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authorLinus Torvalds <torvalds@linux-foundation.org>2021-02-20 21:28:04 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2021-02-20 21:28:04 -0800
commite4286926abbbaab9b047c8bc25cae78ec990928f (patch)
tree02d3c80e581476d93253df5c16dbf9f907494e1c
parent3342ff2698e9720f4040cc458a2744b2b32f5c3a (diff)
parenta157270fbf37f822e1fa9e9faa8ed8c81da1eb28 (diff)
downloadlinux-e4286926abbbaab9b047c8bc25cae78ec990928f.tar.bz2
Merge tag 'tty-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial driver updates from Greg KH: "Here is the big set of tty/serial driver changes for 5.12-rc1. Nothing huge, just lots of good cleanups and additions: - n_tty line discipline cleanups - vt core cleanups and reworks to make the code more "modern" - stm32 driver additions - tty led support added to the tty core and led layer - minor serial driver fixups and additions All of these have been in linux-next for a while with no reported issues" * tag 'tty-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (54 commits) serial: core: Remove BUG_ON(in_interrupt()) check vt_ioctl: Remove in_interrupt() check dt-bindings: serial: imx: Switch to my personal address vt: keyboard, use new API for keyboard_tasklet serial: stm32: improve platform_get_irq condition handling in init_port serial: ifx6x60: Remove driver for deprecated platform tty: fix up iterate_tty_read() EOVERFLOW handling tty: fix up hung_up_tty_read() conversion tty: fix up hung_up_tty_write() conversion tty: teach the n_tty ICANON case about the new "cookie continuations" too tty: teach n_tty line discipline about the new "cookie continuations" tty: clean up legacy leftovers from n_tty line discipline tty: implement read_iter tty: convert tty_ldisc_ops 'read()' function to take a kernel pointer serial: remove sirf prima/atlas driver serial: mxs-auart: Remove <asm/cacheflush.h> serial: mxs-auart: Remove serial_mxs_probe_dt() serial: fsl_lpuart: Use of_device_get_match_data() dt-bindings: serial: renesas,hscif: Add r8a779a0 support tty: serial: Drop unused efm32 serial driver ...
-rw-r--r--Documentation/ABI/testing/sysfs-class-led-trigger-tty6
-rw-r--r--Documentation/devicetree/bindings/serial/fsl-imx-uart.yaml2
-rw-r--r--Documentation/devicetree/bindings/serial/fsl-mxs-auart.yaml2
-rw-r--r--Documentation/devicetree/bindings/serial/renesas,hscif.yaml1
-rw-r--r--Documentation/devicetree/bindings/serial/sirf-uart.txt34
-rw-r--r--Documentation/devicetree/bindings/serial/st,stm32-uart.yaml13
-rw-r--r--Documentation/networking/caif/caif.rst1
-rw-r--r--drivers/accessibility/speakup/spk_ttyio.c2
-rw-r--r--drivers/bluetooth/hci_ldisc.c34
-rw-r--r--drivers/char/pcmcia/synclink_cs.c2
-rw-r--r--drivers/input/serio/serport.c4
-rw-r--r--drivers/leds/trigger/Kconfig9
-rw-r--r--drivers/leds/trigger/Makefile1
-rw-r--r--drivers/leds/trigger/ledtrig-tty.c183
-rw-r--r--drivers/net/caif/caif_serial.c3
-rw-r--r--drivers/net/ppp/ppp_async.c3
-rw-r--r--drivers/net/ppp/ppp_synctty.c3
-rw-r--r--drivers/s390/char/con3215.c1
-rw-r--r--drivers/s390/char/sclp_tty.c1
-rw-r--r--drivers/s390/char/sclp_vt220.c1
-rw-r--r--drivers/s390/char/tty3270.c2
-rw-r--r--drivers/tty/amiserial.c3
-rw-r--r--drivers/tty/hvc/hvcs.c5
-rw-r--r--drivers/tty/ipwireless/tty.c1
-rw-r--r--drivers/tty/mxser.c1
-rw-r--r--drivers/tty/n_gsm.c3
-rw-r--r--drivers/tty/n_hdlc.c60
-rw-r--r--drivers/tty/n_null.c3
-rw-r--r--drivers/tty/n_r3964.c10
-rw-r--r--drivers/tty/n_tracerouter.c4
-rw-r--r--drivers/tty/n_tracesink.c4
-rw-r--r--drivers/tty/n_tty.c153
-rw-r--r--drivers/tty/pty.c16
-rw-r--r--drivers/tty/serial/8250/8250_tegra.c11
-rw-r--r--drivers/tty/serial/Kconfig42
-rw-r--r--drivers/tty/serial/Makefile3
-rw-r--r--drivers/tty/serial/cpm_uart/cpm_uart_core.c43
-rw-r--r--drivers/tty/serial/efm32-uart.c852
-rw-r--r--drivers/tty/serial/fsl_lpuart.c4
-rw-r--r--drivers/tty/serial/icom.c4
-rw-r--r--drivers/tty/serial/ifx6x60.c1390
-rw-r--r--drivers/tty/serial/ifx6x60.h118
-rw-r--r--drivers/tty/serial/imx.c2
-rw-r--r--drivers/tty/serial/lantiq.c2
-rw-r--r--drivers/tty/serial/max3100.c3
-rw-r--r--drivers/tty/serial/mxs-auart.c45
-rw-r--r--drivers/tty/serial/owl-uart.c38
-rw-r--r--drivers/tty/serial/serial_core.c11
-rw-r--r--drivers/tty/serial/sirfsoc_uart.c1503
-rw-r--r--drivers/tty/serial/sirfsoc_uart.h447
-rw-r--r--drivers/tty/serial/stm32-usart.c419
-rw-r--r--drivers/tty/synclink_gt.c1
-rw-r--r--drivers/tty/tty_io.c210
-rw-r--r--drivers/tty/vcc.c10
-rw-r--r--drivers/tty/vt/consolemap.c2
-rw-r--r--drivers/tty/vt/defkeymap.c_shipped82
-rw-r--r--drivers/tty/vt/keyboard.c18
-rw-r--r--drivers/tty/vt/vt.c42
-rw-r--r--drivers/tty/vt/vt_ioctl.c154
-rw-r--r--drivers/video/console/vgacon.c19
-rw-r--r--include/linux/kbd_kern.h10
-rw-r--r--include/linux/kd.h8
-rw-r--r--include/linux/platform_data/efm32-uart.h19
-rw-r--r--include/linux/spi/ifx_modem.h15
-rw-r--r--include/linux/tty.h11
-rw-r--r--include/linux/tty_ldisc.h3
-rw-r--r--include/linux/vt_kern.h12
-rw-r--r--include/uapi/linux/serial_core.h3
-rw-r--r--include/uapi/linux/termios.h15
-rw-r--r--net/nfc/nci/uart.c3
70 files changed, 958 insertions, 5187 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-led-trigger-tty b/Documentation/ABI/testing/sysfs-class-led-trigger-tty
new file mode 100644
index 000000000000..2bf6b24e781b
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-led-trigger-tty
@@ -0,0 +1,6 @@
+What: /sys/class/leds/<led>/ttyname
+Date: Dec 2020
+KernelVersion: 5.10
+Contact: linux-leds@vger.kernel.org
+Description:
+ Specifies the tty device name of the triggering tty
diff --git a/Documentation/devicetree/bindings/serial/fsl-imx-uart.yaml b/Documentation/devicetree/bindings/serial/fsl-imx-uart.yaml
index 9702c07a6b6c..2b06c6ce4a75 100644
--- a/Documentation/devicetree/bindings/serial/fsl-imx-uart.yaml
+++ b/Documentation/devicetree/bindings/serial/fsl-imx-uart.yaml
@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
title: Freescale i.MX Universal Asynchronous Receiver/Transmitter (UART)
maintainers:
- - Fabio Estevam <fabio.estevam@nxp.com>
+ - Fabio Estevam <festevam@gmail.com>
allOf:
- $ref: "serial.yaml"
diff --git a/Documentation/devicetree/bindings/serial/fsl-mxs-auart.yaml b/Documentation/devicetree/bindings/serial/fsl-mxs-auart.yaml
index ce1d89496342..14c7594c88c6 100644
--- a/Documentation/devicetree/bindings/serial/fsl-mxs-auart.yaml
+++ b/Documentation/devicetree/bindings/serial/fsl-mxs-auart.yaml
@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
title: Freescale MXS Application UART (AUART)
maintainers:
- - Fabio Estevam <fabio.estevam@nxp.com>
+ - Fabio Estevam <festevam@gmail.com>
allOf:
- $ref: "serial.yaml"
diff --git a/Documentation/devicetree/bindings/serial/renesas,hscif.yaml b/Documentation/devicetree/bindings/serial/renesas,hscif.yaml
index c139c5edb93e..512a84942f78 100644
--- a/Documentation/devicetree/bindings/serial/renesas,hscif.yaml
+++ b/Documentation/devicetree/bindings/serial/renesas,hscif.yaml
@@ -51,6 +51,7 @@ properties:
- renesas,hscif-r8a77980 # R-Car V3H
- renesas,hscif-r8a77990 # R-Car E3
- renesas,hscif-r8a77995 # R-Car D3
+ - renesas,hscif-r8a779a0 # R-Car V3U
- const: renesas,rcar-gen3-hscif # R-Car Gen3 and RZ/G2
- const: renesas,hscif # generic HSCIF compatible UART
diff --git a/Documentation/devicetree/bindings/serial/sirf-uart.txt b/Documentation/devicetree/bindings/serial/sirf-uart.txt
deleted file mode 100644
index 1e48bbbeecc6..000000000000
--- a/Documentation/devicetree/bindings/serial/sirf-uart.txt
+++ /dev/null
@@ -1,34 +0,0 @@
-* CSR SiRFprimaII/atlasVI Universal Synchronous Asynchronous Receiver/Transmitter *
-
-Required properties:
-- compatible : Should be "sirf,prima2-uart", "sirf, prima2-usp-uart",
- "sirf,atlas7-uart" or "sirf,atlas7-usp-uart".
-- reg : Offset and length of the register set for the device
-- interrupts : Should contain uart interrupt
-- fifosize : Should define hardware rx/tx fifo size
-- clocks : Should contain uart clock number
-
-Optional properties:
-- uart-has-rtscts: we have hardware flow controller pins in hardware
-- rts-gpios: RTS pin for USP-based UART if uart-has-rtscts is true
-- cts-gpios: CTS pin for USP-based UART if uart-has-rtscts is true
-
-Example:
-
-uart0: uart@b0050000 {
- cell-index = <0>;
- compatible = "sirf,prima2-uart";
- reg = <0xb0050000 0x1000>;
- interrupts = <17>;
- fifosize = <128>;
- clocks = <&clks 13>;
-};
-
-On the board-specific dts, we can put rts-gpios and cts-gpios like
-
-usp@b0090000 {
- compatible = "sirf,prima2-usp-uart";
- uart-has-rtscts;
- rts-gpios = <&gpio 15 0>;
- cts-gpios = <&gpio 46 0>;
-};
diff --git a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml
index 06d5f251ec88..8631678283f9 100644
--- a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml
+++ b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml
@@ -50,11 +50,14 @@ properties:
minItems: 1
maxItems: 2
- cts-gpios:
- maxItems: 1
-
- rts-gpios:
- maxItems: 1
+# cts-gpios and rts-gpios properties can be used instead of 'uart-has-rtscts'
+# or 'st,hw-flow-ctrl' (deprecated) for making use of any gpio pins for flow
+# control instead of dedicated pins.
+#
+# It should be noted that both cts-gpios/rts-gpios and 'uart-has-rtscts' or
+# 'st,hw-flow-ctrl' (deprecated) properties cannot co-exist in a design.
+ cts-gpios: true
+ rts-gpios: true
wakeup-source: true
diff --git a/Documentation/networking/caif/caif.rst b/Documentation/networking/caif/caif.rst
index a07213030ccf..81a14373d780 100644
--- a/Documentation/networking/caif/caif.rst
+++ b/Documentation/networking/caif/caif.rst
@@ -68,7 +68,6 @@ There are debugfs parameters provided for serial communication.
* tty_status: Prints the bit-mask tty status information
- 0x01 - tty->warned is on.
- - 0x02 - tty->low_latency is on.
- 0x04 - tty->packed is on.
- 0x08 - tty->flow_stopped is on.
- 0x10 - tty->hw_stopped is on.
diff --git a/drivers/accessibility/speakup/spk_ttyio.c b/drivers/accessibility/speakup/spk_ttyio.c
index 6284aff434a1..835d17455fcd 100644
--- a/drivers/accessibility/speakup/spk_ttyio.c
+++ b/drivers/accessibility/speakup/spk_ttyio.c
@@ -152,7 +152,7 @@ static int spk_ttyio_initialise_ldisc(struct spk_synth *synth)
if (ret)
return ret;
- tty = tty_kopen(dev);
+ tty = tty_kopen_exclusive(dev);
if (IS_ERR(tty))
return PTR_ERR(tty);
diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index 8be4d807d137..637c5b8c2aa1 100644
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -801,7 +801,8 @@ static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file *file,
* We don't provide read/write/poll interface for user space.
*/
static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file,
- unsigned char __user *buf, size_t nr)
+ unsigned char *buf, size_t nr,
+ void **cookie, unsigned long offset)
{
return 0;
}
@@ -818,29 +819,28 @@ static __poll_t hci_uart_tty_poll(struct tty_struct *tty,
return 0;
}
+static struct tty_ldisc_ops hci_uart_ldisc = {
+ .owner = THIS_MODULE,
+ .magic = TTY_LDISC_MAGIC,
+ .name = "n_hci",
+ .open = hci_uart_tty_open,
+ .close = hci_uart_tty_close,
+ .read = hci_uart_tty_read,
+ .write = hci_uart_tty_write,
+ .ioctl = hci_uart_tty_ioctl,
+ .compat_ioctl = hci_uart_tty_ioctl,
+ .poll = hci_uart_tty_poll,
+ .receive_buf = hci_uart_tty_receive,
+ .write_wakeup = hci_uart_tty_wakeup,
+};
+
static int __init hci_uart_init(void)
{
- static struct tty_ldisc_ops hci_uart_ldisc;
int err;
BT_INFO("HCI UART driver ver %s", VERSION);
/* Register the tty discipline */
-
- memset(&hci_uart_ldisc, 0, sizeof(hci_uart_ldisc));
- hci_uart_ldisc.magic = TTY_LDISC_MAGIC;
- hci_uart_ldisc.name = "n_hci";
- hci_uart_ldisc.open = hci_uart_tty_open;
- hci_uart_ldisc.close = hci_uart_tty_close;
- hci_uart_ldisc.read = hci_uart_tty_read;
- hci_uart_ldisc.write = hci_uart_tty_write;
- hci_uart_ldisc.ioctl = hci_uart_tty_ioctl;
- hci_uart_ldisc.compat_ioctl = hci_uart_tty_ioctl;
- hci_uart_ldisc.poll = hci_uart_tty_poll;
- hci_uart_ldisc.receive_buf = hci_uart_tty_receive;
- hci_uart_ldisc.write_wakeup = hci_uart_tty_wakeup;
- hci_uart_ldisc.owner = THIS_MODULE;
-
err = tty_register_ldisc(N_HCI, &hci_uart_ldisc);
if (err) {
BT_ERR("HCI line discipline registration failed. (%d)", err);
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index e342daa73d1b..2be8d9a8eec5 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -2494,8 +2494,6 @@ static int mgslpc_open(struct tty_struct *tty, struct file * filp)
printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
__FILE__, __LINE__, tty->driver->name, port->count);
- port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
-
spin_lock_irqsave(&info->netlock, flags);
if (info->netcount) {
retval = -EBUSY;
diff --git a/drivers/input/serio/serport.c b/drivers/input/serio/serport.c
index 8ac970a423de..33e9d9bfd036 100644
--- a/drivers/input/serio/serport.c
+++ b/drivers/input/serio/serport.c
@@ -156,7 +156,9 @@ out:
* returning 0 characters.
*/
-static ssize_t serport_ldisc_read(struct tty_struct * tty, struct file * file, unsigned char __user * buf, size_t nr)
+static ssize_t serport_ldisc_read(struct tty_struct * tty, struct file * file,
+ unsigned char *kbuf, size_t nr,
+ void **cookie, unsigned long offset)
{
struct serport *serport = (struct serport*) tty->disc_data;
struct serio *serio;
diff --git a/drivers/leds/trigger/Kconfig b/drivers/leds/trigger/Kconfig
index ce9429ca6dde..b77a01bd27f4 100644
--- a/drivers/leds/trigger/Kconfig
+++ b/drivers/leds/trigger/Kconfig
@@ -144,4 +144,13 @@ config LEDS_TRIGGER_AUDIO
the audio mute and mic-mute changes.
If unsure, say N
+config LEDS_TRIGGER_TTY
+ tristate "LED Trigger for TTY devices"
+ depends on TTY
+ help
+ This allows LEDs to be controlled by activity on ttys which includes
+ serial devices like /dev/ttyS0.
+
+ When build as a module this driver will be called ledtrig-tty.
+
endif # LEDS_TRIGGERS
diff --git a/drivers/leds/trigger/Makefile b/drivers/leds/trigger/Makefile
index 733a83e2a718..25c4db97cdd4 100644
--- a/drivers/leds/trigger/Makefile
+++ b/drivers/leds/trigger/Makefile
@@ -15,3 +15,4 @@ obj-$(CONFIG_LEDS_TRIGGER_PANIC) += ledtrig-panic.o
obj-$(CONFIG_LEDS_TRIGGER_NETDEV) += ledtrig-netdev.o
obj-$(CONFIG_LEDS_TRIGGER_PATTERN) += ledtrig-pattern.o
obj-$(CONFIG_LEDS_TRIGGER_AUDIO) += ledtrig-audio.o
+obj-$(CONFIG_LEDS_TRIGGER_TTY) += ledtrig-tty.o
diff --git a/drivers/leds/trigger/ledtrig-tty.c b/drivers/leds/trigger/ledtrig-tty.c
new file mode 100644
index 000000000000..d2ab6ab080ac
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-tty.c
@@ -0,0 +1,183 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/delay.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <uapi/linux/serial.h>
+
+struct ledtrig_tty_data {
+ struct led_classdev *led_cdev;
+ struct delayed_work dwork;
+ struct mutex mutex;
+ const char *ttyname;
+ struct tty_struct *tty;
+ int rx, tx;
+};
+
+static void ledtrig_tty_restart(struct ledtrig_tty_data *trigger_data)
+{
+ schedule_delayed_work(&trigger_data->dwork, 0);
+}
+
+static ssize_t ttyname_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
+ ssize_t len = 0;
+
+ mutex_lock(&trigger_data->mutex);
+
+ if (trigger_data->ttyname)
+ len = sprintf(buf, "%s\n", trigger_data->ttyname);
+
+ mutex_unlock(&trigger_data->mutex);
+
+ return len;
+}
+
+static ssize_t ttyname_store(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t size)
+{
+ struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
+ char *ttyname;
+ ssize_t ret = size;
+ bool running;
+
+ if (size > 0 && buf[size - 1] == '\n')
+ size -= 1;
+
+ if (size) {
+ ttyname = kmemdup_nul(buf, size, GFP_KERNEL);
+ if (!ttyname) {
+ ret = -ENOMEM;
+ goto out_unlock;
+ }
+ } else {
+ ttyname = NULL;
+ }
+
+ mutex_lock(&trigger_data->mutex);
+
+ running = trigger_data->ttyname != NULL;
+
+ kfree(trigger_data->ttyname);
+ tty_kref_put(trigger_data->tty);
+ trigger_data->tty = NULL;
+
+ trigger_data->ttyname = ttyname;
+
+out_unlock:
+ mutex_unlock(&trigger_data->mutex);
+
+ if (ttyname && !running)
+ ledtrig_tty_restart(trigger_data);
+
+ return ret;
+}
+static DEVICE_ATTR_RW(ttyname);
+
+static void ledtrig_tty_work(struct work_struct *work)
+{
+ struct ledtrig_tty_data *trigger_data =
+ container_of(work, struct ledtrig_tty_data, dwork.work);
+ struct serial_icounter_struct icount;
+ int ret;
+
+ mutex_lock(&trigger_data->mutex);
+
+ if (!trigger_data->ttyname) {
+ /* exit without rescheduling */
+ mutex_unlock(&trigger_data->mutex);
+ return;
+ }
+
+ /* try to get the tty corresponding to $ttyname */
+ if (!trigger_data->tty) {
+ dev_t devno;
+ struct tty_struct *tty;
+ int ret;
+
+ ret = tty_dev_name_to_number(trigger_data->ttyname, &devno);
+ if (ret < 0)
+ /*
+ * A device with this name might appear later, so keep
+ * retrying.
+ */
+ goto out;
+
+ tty = tty_kopen_shared(devno);
+ if (IS_ERR(tty) || !tty)
+ /* What to do? retry or abort */
+ goto out;
+
+ trigger_data->tty = tty;
+ }
+
+ ret = tty_get_icount(trigger_data->tty, &icount);
+ if (ret) {
+ dev_info(trigger_data->tty->dev, "Failed to get icount, stopped polling\n");
+ mutex_unlock(&trigger_data->mutex);
+ return;
+ }
+
+ if (icount.rx != trigger_data->rx ||
+ icount.tx != trigger_data->tx) {
+ led_set_brightness(trigger_data->led_cdev, LED_ON);
+
+ trigger_data->rx = icount.rx;
+ trigger_data->tx = icount.tx;
+ } else {
+ led_set_brightness(trigger_data->led_cdev, LED_OFF);
+ }
+
+out:
+ mutex_unlock(&trigger_data->mutex);
+ schedule_delayed_work(&trigger_data->dwork, msecs_to_jiffies(100));
+}
+
+static struct attribute *ledtrig_tty_attrs[] = {
+ &dev_attr_ttyname.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(ledtrig_tty);
+
+static int ledtrig_tty_activate(struct led_classdev *led_cdev)
+{
+ struct ledtrig_tty_data *trigger_data;
+
+ trigger_data = kzalloc(sizeof(*trigger_data), GFP_KERNEL);
+ if (!trigger_data)
+ return -ENOMEM;
+
+ led_set_trigger_data(led_cdev, trigger_data);
+
+ INIT_DELAYED_WORK(&trigger_data->dwork, ledtrig_tty_work);
+ trigger_data->led_cdev = led_cdev;
+ mutex_init(&trigger_data->mutex);
+
+ return 0;
+}
+
+static void ledtrig_tty_deactivate(struct led_classdev *led_cdev)
+{
+ struct ledtrig_tty_data *trigger_data = led_get_trigger_data(led_cdev);
+
+ cancel_delayed_work_sync(&trigger_data->dwork);
+
+ kfree(trigger_data);
+}
+
+static struct led_trigger ledtrig_tty = {
+ .name = "tty",
+ .activate = ledtrig_tty_activate,
+ .deactivate = ledtrig_tty_deactivate,
+ .groups = ledtrig_tty_groups,
+};
+module_led_trigger(ledtrig_tty);
+
+MODULE_AUTHOR("Uwe Kleine-König <u.kleine-koenig@pengutronix.de>");
+MODULE_DESCRIPTION("UART LED trigger");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/net/caif/caif_serial.c b/drivers/net/caif/caif_serial.c
index bcc14c5875bf..8215cd77301f 100644
--- a/drivers/net/caif/caif_serial.c
+++ b/drivers/net/caif/caif_serial.c
@@ -89,8 +89,7 @@ static inline void update_tty_status(struct ser_device *ser)
ser->tty_status =
ser->tty->stopped << 5 |
ser->tty->flow_stopped << 3 |
- ser->tty->packet << 2 |
- ser->tty->port->low_latency << 1;
+ ser->tty->packet << 2;
}
static inline void debugfs_init(struct ser_device *ser, struct tty_struct *tty)
{
diff --git a/drivers/net/ppp/ppp_async.c b/drivers/net/ppp/ppp_async.c
index 2b66cf301b0e..2a91caa4f37b 100644
--- a/drivers/net/ppp/ppp_async.c
+++ b/drivers/net/ppp/ppp_async.c
@@ -259,7 +259,8 @@ static int ppp_asynctty_hangup(struct tty_struct *tty)
*/
static ssize_t
ppp_asynctty_read(struct tty_struct *tty, struct file *file,
- unsigned char __user *buf, size_t count)
+ unsigned char *buf, size_t count,
+ void **cookie, unsigned long offset)
{
return -EAGAIN;
}
diff --git a/drivers/net/ppp/ppp_synctty.c b/drivers/net/ppp/ppp_synctty.c
index 86ee5149f4f2..d8890923a9e3 100644
--- a/drivers/net/ppp/ppp_synctty.c
+++ b/drivers/net/ppp/ppp_synctty.c
@@ -257,7 +257,8 @@ static int ppp_sync_hangup(struct tty_struct *tty)
*/
static ssize_t
ppp_sync_read(struct tty_struct *tty, struct file *file,
- unsigned char __user *buf, size_t count)
+ unsigned char *buf, size_t count,
+ void **cookie, unsigned long offset)
{
return -EAGAIN;
}
diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c
index 1354c42d95aa..671efee612af 100644
--- a/drivers/s390/char/con3215.c
+++ b/drivers/s390/char/con3215.c
@@ -914,7 +914,6 @@ static int tty3215_open(struct tty_struct *tty, struct file * filp)
tty_port_tty_set(&raw->port, tty);
- raw->port.low_latency = 0; /* don't use bottom half for pushing chars */
/*
* Start up 3215 device
*/
diff --git a/drivers/s390/char/sclp_tty.c b/drivers/s390/char/sclp_tty.c
index 5aff8b684eb2..013bcc331305 100644
--- a/drivers/s390/char/sclp_tty.c
+++ b/drivers/s390/char/sclp_tty.c
@@ -65,7 +65,6 @@ sclp_tty_open(struct tty_struct *tty, struct file *filp)
{
tty_port_tty_set(&sclp_port, tty);
tty->driver_data = NULL;
- sclp_port.low_latency = 0;
return 0;
}
diff --git a/drivers/s390/char/sclp_vt220.c b/drivers/s390/char/sclp_vt220.c
index 3f9a6ef650fa..047f812d1a1c 100644
--- a/drivers/s390/char/sclp_vt220.c
+++ b/drivers/s390/char/sclp_vt220.c
@@ -560,7 +560,6 @@ sclp_vt220_open(struct tty_struct *tty, struct file *filp)
{
if (tty->count == 1) {
tty_port_tty_set(&sclp_vt220_port, tty);
- sclp_vt220_port.low_latency = 0;
if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
tty->winsize.ws_row = 24;
tty->winsize.ws_col = 80;
diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c
index aec996de44d9..15692449a1c3 100644
--- a/drivers/s390/char/tty3270.c
+++ b/drivers/s390/char/tty3270.c
@@ -967,7 +967,6 @@ static int tty3270_install(struct tty_driver *driver, struct tty_struct *tty)
tty->driver_data = tp;
tty->winsize.ws_row = tp->view.rows - 2;
tty->winsize.ws_col = tp->view.cols;
- tp->port.low_latency = 0;
tp->inattr = TF_INPUT;
goto port_install;
}
@@ -996,7 +995,6 @@ static int tty3270_install(struct tty_driver *driver, struct tty_struct *tty)
return rc;
}
- tp->port.low_latency = 0;
tty->winsize.ws_row = tp->view.rows - 2;
tty->winsize.ws_col = tp->view.cols;
diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
index 13f63c01c589..18b78ea110ef 100644
--- a/drivers/tty/amiserial.c
+++ b/drivers/tty/amiserial.c
@@ -998,7 +998,6 @@ static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss)
state->custom_divisor = ss->custom_divisor;
port->close_delay = ss->close_delay * HZ/100;
port->closing_wait = ss->closing_wait * HZ/100;
- port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
check_and_exit:
if (tty_port_initialized(port)) {
@@ -1386,8 +1385,6 @@ static int rs_open(struct tty_struct *tty, struct file * filp)
tty->driver_data = info;
tty->port = port;
- port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
-
retval = startup(tty, info);
if (retval) {
return retval;
diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c
index 509d1042825a..c90848919644 100644
--- a/drivers/tty/hvc/hvcs.c
+++ b/drivers/tty/hvc/hvcs.c
@@ -605,7 +605,7 @@ static int hvcs_io(struct hvcs_struct *hvcsd)
hvcsd->todo_mask |= HVCS_QUICK_READ;
spin_unlock_irqrestore(&hvcsd->lock, flags);
- /* This is synch because tty->low_latency == 1 */
+ /* This is synch -- FIXME :js: it is not! */
if(got)
tty_flip_buffer_push(&hvcsd->port);
@@ -825,9 +825,6 @@ static int hvcs_remove(struct vio_dev *dev)
unsigned long flags;
struct tty_struct *tty;
- if (!hvcsd)
- return -ENODEV;
-
/* By this time the vty-server won't be getting any more interrupts */
spin_lock_irqsave(&hvcsd->lock, flags);
diff --git a/drivers/tty/ipwireless/tty.c b/drivers/tty/ipwireless/tty.c
index 23584769fc29..6dacbc5e286c 100644
--- a/drivers/tty/ipwireless/tty.c
+++ b/drivers/tty/ipwireless/tty.c
@@ -101,7 +101,6 @@ static int ipw_open(struct tty_struct *linux_tty, struct file *filp)
tty->port.tty = linux_tty;
linux_tty->driver_data = tty;
- tty->port.low_latency = 1;
if (tty->tty_type == TTYTYPE_MODEM)
ipwireless_ppp_open(tty->network);
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index 3703987c4666..4203b64bccdb 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -1273,7 +1273,6 @@ static int mxser_set_serial_info(struct tty_struct *tty,
(ss->flags & ASYNC_FLAGS));
port->close_delay = ss->close_delay * HZ / 100;
port->closing_wait = ss->closing_wait * HZ / 100;
- port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
(ss->baud_base != info->baud_base ||
ss->custom_divisor !=
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index c676fa89ee0b..51dafc06f541 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -2559,7 +2559,8 @@ static void gsmld_write_wakeup(struct tty_struct *tty)
*/
static ssize_t gsmld_read(struct tty_struct *tty, struct file *file,
- unsigned char __user *buf, size_t nr)
+ unsigned char *buf, size_t nr,
+ void **cookie, unsigned long offset)
{
return -EOPNOTSUPP;
}
diff --git a/drivers/tty/n_hdlc.c b/drivers/tty/n_hdlc.c
index 12557ee1edb6..1363e659dc1d 100644
--- a/drivers/tty/n_hdlc.c
+++ b/drivers/tty/n_hdlc.c
@@ -416,13 +416,19 @@ static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data,
* Returns the number of bytes returned or error code.
*/
static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
- __u8 __user *buf, size_t nr)
+ __u8 *kbuf, size_t nr,
+ void **cookie, unsigned long offset)
{
struct n_hdlc *n_hdlc = tty->disc_data;
int ret = 0;
struct n_hdlc_buf *rbuf;
DECLARE_WAITQUEUE(wait, current);
+ /* Is this a repeated call for an rbuf we already found earlier? */
+ rbuf = *cookie;
+ if (rbuf)
+ goto have_rbuf;
+
add_wait_queue(&tty->read_wait, &wait);
for (;;) {
@@ -436,25 +442,8 @@ static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
set_current_state(TASK_INTERRUPTIBLE);
rbuf = n_hdlc_buf_get(&n_hdlc->rx_buf_list);
- if (rbuf) {
- if (rbuf->count > nr) {
- /* too large for caller's buffer */
- ret = -EOVERFLOW;
- } else {
- __set_current_state(TASK_RUNNING);
- if (copy_to_user(buf, rbuf->buf, rbuf->count))
- ret = -EFAULT;
- else
- ret = rbuf->count;
- }
-
- if (n_hdlc->rx_free_buf_list.count >
- DEFAULT_RX_BUF_COUNT)
- kfree(rbuf);
- else
- n_hdlc_buf_put(&n_hdlc->rx_free_buf_list, rbuf);
+ if (rbuf)
break;
- }
/* no data */
if (tty_io_nonblock(tty, file)) {
@@ -473,6 +462,39 @@ static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
remove_wait_queue(&tty->read_wait, &wait);
__set_current_state(TASK_RUNNING);
+ if (!rbuf)
+ return ret;
+ *cookie = rbuf;
+
+have_rbuf:
+ /* Have we used it up entirely? */
+ if (offset >= rbuf->count)
+ goto done_with_rbuf;
+
+ /* More data to go, but can't copy any more? EOVERFLOW */
+ ret = -EOVERFLOW;
+ if (!nr)
+ goto done_with_rbuf;
+
+ /* Copy as much data as possible */
+ ret = rbuf->count - offset;
+ if (ret > nr)
+ ret = nr;
+ memcpy(kbuf, rbuf->buf+offset, ret);
+ offset += ret;
+
+ /* If we still have data left, we leave the rbuf in the cookie */
+ if (offset < rbuf->count)
+ return ret;
+
+done_with_rbuf:
+ *cookie = NULL;
+
+ if (n_hdlc->rx_free_buf_list.count > DEFAULT_RX_BUF_COUNT)
+ kfree(rbuf);
+ else
+ n_hdlc_buf_put(&n_hdlc->rx_free_buf_list, rbuf);
+
return ret;
} /* end of n_hdlc_tty_read() */
diff --git a/drivers/tty/n_null.c b/drivers/tty/n_null.c
index 96feabae4740..ce03ae78f5c6 100644
--- a/drivers/tty/n_null.c
+++ b/drivers/tty/n_null.c
@@ -20,7 +20,8 @@ static void n_null_close(struct tty_struct *tty)
}
static ssize_t n_null_read(struct tty_struct *tty, struct file *file,
- unsigned char __user * buf, size_t nr)
+ unsigned char *buf, size_t nr,
+ void **cookie, unsigned long offset)
{
return -EOPNOTSUPP;
}
diff --git a/drivers/tty/n_r3964.c b/drivers/tty/n_r3964.c
index 934dd2fb2ec8..3161f0a535e3 100644
--- a/drivers/tty/n_r3964.c
+++ b/drivers/tty/n_r3964.c
@@ -129,7 +129,7 @@ static void remove_client_block(struct r3964_info *pInfo,
static int r3964_open(struct tty_struct *tty);
static void r3964_close(struct tty_struct *tty);
static ssize_t r3964_read(struct tty_struct *tty, struct file *file,
- unsigned char __user * buf, size_t nr);
+ void *cookie, unsigned char *buf, size_t nr);
static ssize_t r3964_write(struct tty_struct *tty, struct file *file,
const unsigned char *buf, size_t nr);
static int r3964_ioctl(struct tty_struct *tty, struct file *file,
@@ -1058,7 +1058,8 @@ static void r3964_close(struct tty_struct *tty)
}
static ssize_t r3964_read(struct tty_struct *tty, struct file *file,
- unsigned char __user * buf, size_t nr)
+ unsigned char *kbuf, size_t nr,
+ void **cookie, unsigned long offset)
{
struct r3964_info *pInfo = tty->disc_data;
struct r3964_client_info *pClient;
@@ -1109,10 +1110,7 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file,
kfree(pMsg);
TRACE_M("r3964_read - msg kfree %p", pMsg);
- if (copy_to_user(buf, &theMsg, ret)) {
- ret = -EFAULT;
- goto unlock;
- }
+ memcpy(kbuf, &theMsg, ret);
TRACE_PS("read - return %d", ret);
goto unlock;
diff --git a/drivers/tty/n_tracerouter.c b/drivers/tty/n_tracerouter.c
index 4479af4d2fa5..3490ed51b1a3 100644
--- a/drivers/tty/n_tracerouter.c
+++ b/drivers/tty/n_tracerouter.c
@@ -118,7 +118,9 @@ static void n_tracerouter_close(struct tty_struct *tty)
* -EINVAL
*/
static ssize_t n_tracerouter_read(struct tty_struct *tty, struct file *file,
- unsigned char __user *buf, size_t nr) {
+ unsigned char *buf, size_t nr,
+ void **cookie, unsigned long offset)
+{
return -EINVAL;
}
diff --git a/drivers/tty/n_tracesink.c b/drivers/tty/n_tracesink.c
index d96ba82cc356..1d9931041fd8 100644
--- a/drivers/tty/n_tracesink.c
+++ b/drivers/tty/n_tracesink.c
@@ -115,7 +115,9 @@ static void n_tracesink_close(struct tty_struct *tty)
* -EINVAL
*/
static ssize_t n_tracesink_read(struct tty_struct *tty, struct file *file,
- unsigned char __user *buf, size_t nr) {
+ unsigned char *buf, size_t nr,
+ void **cookie, unsigned long offset)
+{
return -EINVAL;
}
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 219e85756171..87ec15dbe10d 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -164,29 +164,24 @@ static void zero_buffer(struct tty_struct *tty, u8 *buffer, int size)
memset(buffer, 0x00, size);
}
-static int tty_copy_to_user(struct tty_struct *tty, void __user *to,
- size_t tail, size_t n)
+static void tty_copy(struct tty_struct *tty, void *to, size_t tail, size_t n)
{
struct n_tty_data *ldata = tty->disc_data;
size_t size = N_TTY_BUF_SIZE - tail;
void *from = read_buf_addr(ldata, tail);
- int uncopied;
if (n > size) {
tty_audit_add_data(tty, from, size);
- uncopied = copy_to_user(to, from, size);
- zero_buffer(tty, from, size - uncopied);
- if (uncopied)
- return uncopied;
+ memcpy(to, from, size);
+ zero_buffer(tty, from, size);
to += size;
n -= size;
from = ldata->read_buf;
}
tty_audit_add_data(tty, from, n);
- uncopied = copy_to_user(to, from, n);
- zero_buffer(tty, from, n - uncopied);
- return uncopied;
+ memcpy(to, from, n);
+ zero_buffer(tty, from, n);
}
/**
@@ -1894,8 +1889,10 @@ static void n_tty_close(struct tty_struct *tty)
if (tty->link)
n_tty_packet_mode_flush(tty);
+ down_write(&tty->termios_rwsem);
vfree(ldata);
tty->disc_data = NULL;
+ up_write(&tty->termios_rwsem);
}
/**
@@ -1944,42 +1941,38 @@ static inline int input_available_p(struct tty_struct *tty, int poll)
/**
* copy_from_read_buf - copy read data directly
* @tty: terminal device
- * @b: user data
+ * @kbp: data
* @nr: size of data
*
* Helper function to speed up n_tty_read. It is only called when
- * ICANON is off; it copies characters straight from the tty queue to
- * user space directly. It can be profitably called twice; once to
- * drain the space from the tail pointer to the (physical) end of the
- * buffer, and once to drain the space from the (physical) beginning of
- * the buffer to head pointer.
+ * ICANON is off; it copies characters straight from the tty queue.
*
* Called under the ldata->atomic_read_lock sem
*
+ * Returns true if it successfully copied data, but there is still
+ * more data to be had.
+ *
* n_tty_read()/consumer path:
* caller holds non-exclusive termios_rwsem
* read_tail published
*/
-static int copy_from_read_buf(struct tty_struct *tty,
- unsigned char __user **b,
+static bool copy_from_read_buf(struct tty_struct *tty,
+ unsigned char **kbp,
size_t *nr)
{
struct n_tty_data *ldata = tty->disc_data;
- int retval;
size_t n;
bool is_eof;
size_t head = smp_load_acquire(&ldata->commit_head);
size_t tail = ldata->read_tail & (N_TTY_BUF_SIZE - 1);
- retval = 0;
n = min(head - ldata->read_tail, N_TTY_BUF_SIZE - tail);
n = min(*nr, n);
if (n) {
unsigned char *from = read_buf_addr(ldata, tail);
- retval = copy_to_user(*b, from, n);
- n -= retval;
+ memcpy(*kbp, from, n);
is_eof = n == 1 && *from == EOF_CHAR(tty);
tty_audit_add_data(tty, from, n);
zero_buffer(tty, from, n);
@@ -1987,22 +1980,25 @@ static int copy_from_read_buf(struct tty_struct *tty,
/* Turn single EOF into zero-length read */
if (L_EXTPROC(tty) && ldata->icanon && is_eof &&
(head == ldata->read_tail))
- n = 0;
- *b += n;
+ return false;
+ *kbp += n;
*nr -= n;
+
+ /* If we have more to copy, let the caller know */
+ return head != ldata->read_tail;
}
- return retval;
+ return false;
}
/**
* canon_copy_from_read_buf - copy read data in canonical mode
* @tty: terminal device
- * @b: user data
+ * @kbp: data
* @nr: size of data
*
* Helper function for n_tty_read. It is only called when ICANON is on;
* it copies one line of input up to and including the line-delimiting
- * character into the user-space buffer.
+ * character into the result buffer.
*
* NB: When termios is changed from non-canonical to canonical mode and
* the read buffer contains data, n_tty_set_termios() simulates an EOF
@@ -2017,21 +2013,22 @@ static int copy_from_read_buf(struct tty_struct *tty,
* read_tail published
*/
-static int canon_copy_from_read_buf(struct tty_struct *tty,
- unsigned char __user **b,
- size_t *nr)
+static bool canon_copy_from_read_buf(struct tty_struct *tty,
+ unsigned char **kbp,
+ size_t *nr)
{
struct n_tty_data *ldata = tty->disc_data;
size_t n, size, more, c;
size_t eol;
- size_t tail;
- int ret, found = 0;
+ size_t tail, canon_head;
+ int found = 0;
/* N.B. avoid overrun if nr == 0 */
if (!*nr)
- return 0;
+ return false;
- n = min(*nr + 1, smp_load_acquire(&ldata->canon_head) - ldata->read_tail);
+ canon_head = smp_load_acquire(&ldata->canon_head);
+ n = min(*nr + 1, canon_head - ldata->read_tail);
tail = ldata->read_tail & (N_TTY_BUF_SIZE - 1);
size = min_t(size_t, tail + n, N_TTY_BUF_SIZE);
@@ -2061,10 +2058,8 @@ static int canon_copy_from_read_buf(struct tty_struct *tty,
n_tty_trace("%s: eol:%zu found:%d n:%zu c:%zu tail:%zu more:%zu\n",
__func__, eol, found, n, c, tail, more);
- ret = tty_copy_to_user(tty, *b, tail, n);
- if (ret)
- return -EFAULT;
- *b += n;
+ tty_copy(tty, *kbp, tail, n);
+ *kbp += n;
*nr -= n;
if (found)
@@ -2077,8 +2072,11 @@ static int canon_copy_from_read_buf(struct tty_struct *tty,
else
ldata->push = 0;
tty_audit_push();
+ return false;
}
- return 0;
+
+ /* No EOL found - do a continuation retry if there is more data */
+ return ldata->read_tail != canon_head;
}
/**
@@ -2129,10 +2127,11 @@ static int job_control(struct tty_struct *tty, struct file *file)
*/
static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
- unsigned char __user *buf, size_t nr)
+ unsigned char *kbuf, size_t nr,
+ void **cookie, unsigned long offset)
{
struct n_tty_data *ldata = tty->disc_data;
- unsigned char __user *b = buf;
+ unsigned char *kb = kbuf;
DEFINE_WAIT_FUNC(wait, woken_wake_function);
int c;
int minimum, time;
@@ -2141,6 +2140,30 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
int packet;
size_t tail;
+ /*
+ * Is this a continuation of a read started earler?
+ *
+ * If so, we still hold the atomic_read_lock and the
+ * termios_rwsem, and can just continue to copy data.
+ */
+ if (*cookie) {
+ if (ldata->icanon && !L_EXTPROC(tty)) {
+ if (canon_copy_from_read_buf(tty, &kb, &nr))
+ return kb - kbuf;
+ } else {
+ if (copy_from_read_buf(tty, &kb, &nr))
+ return kb - kbuf;
+ }
+
+ /* No more data - release locks and stop retries */
+ n_tty_kick_worker(tty);
+ n_tty_check_unthrottle(tty);
+ up_read(&tty->termios_rwsem);
+ mutex_unlock(&ldata->atomic_read_lock);
+ *cookie = NULL;
+ return kb - kbuf;
+ }
+
c = job_control(tty, file);
if (c < 0)
return c;
@@ -2178,17 +2201,13 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
/* First test for status change. */
if (packet && tty->link->ctrl_status) {
unsigned char cs;
- if (b != buf)
+ if (kb != kbuf)
break;
spin_lock_irq(&tty->link->ctrl_lock);
cs = tty->link->ctrl_status;
tty->link->ctrl_status = 0;
spin_unlock_irq(&tty->link->ctrl_lock);
- if (put_user(cs, b)) {
- retval = -EFAULT;
- break;
- }
- b++;
+ *kb++ = cs;
nr--;
break;
}
@@ -2231,33 +2250,35 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
}
if (ldata->icanon && !L_EXTPROC(tty)) {
- retval = canon_copy_from_read_buf(tty, &b, &nr);
- if (retval)
- break;
+ if (canon_copy_from_read_buf(tty, &kb, &nr))
+ goto more_to_be_read;
} else {
- int uncopied;
-
/* Deal with packet mode. */
- if (packet && b == buf) {
- if (put_user(TIOCPKT_DATA, b)) {
- retval = -EFAULT;
- break;
- }
- b++;
+ if (packet && kb == kbuf) {
+ *kb++ = TIOCPKT_DATA;
nr--;
}
- uncopied = copy_from_read_buf(tty, &b, &nr);
- uncopied += copy_from_read_buf(tty, &b, &nr);
- if (uncopied) {
- retval = -EFAULT;
- break;
+ /*
+ * Copy data, and if there is more to be had
+ * and we have nothing more to wait for, then
+ * let's mark us for retries.
+ *
+ * NOTE! We return here with both the termios_sem
+ * and atomic_read_lock still held, the retries
+ * will release them when done.
+ */
+ if (copy_from_read_buf(tty, &kb, &nr) && kb - kbuf >= minimum) {
+more_to_be_read:
+ remove_wait_queue(&tty->read_wait, &wait);
+ *cookie = cookie;
+ return kb - kbuf;
}
}
n_tty_check_unthrottle(tty);
- if (b - buf >= minimum)
+ if (kb - kbuf >= minimum)
break;
if (time)
timeout = time;
@@ -2269,8 +2290,8 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
remove_wait_queue(&tty->read_wait, &wait);
mutex_unlock(&ldata->atomic_read_lock);
- if (b - buf)
- retval = b - buf;
+ if (kb - kbuf)
+ retval = kb - kbuf;
return retval;
}
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index a59f1e062bc6..8b2797b6ee44 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -45,7 +45,6 @@ static DEFINE_MUTEX(devpts_mutex);
static void pty_close(struct tty_struct *tty, struct file *filp)
{
- BUG_ON(!tty);
if (tty->driver->subtype == PTY_TYPE_MASTER)
WARN_ON(tty->count > 1);
else {
@@ -67,7 +66,8 @@ static void pty_close(struct tty_struct *tty, struct file *filp)
wake_up_interruptible(&tty->link->read_wait);
wake_up_interruptible(&tty->link->write_wait);
if (tty->driver->subtype == PTY_TYPE_MASTER) {
- set_bit(TTY_OTHER_CLOSED, &tty->flags);
+ struct file *f;
+
#ifdef CONFIG_UNIX98_PTYS
if (tty->driver == ptm_driver) {
mutex_lock(&devpts_mutex);
@@ -76,7 +76,17 @@ static void pty_close(struct tty_struct *tty, struct file *filp)
mutex_unlock(&devpts_mutex);
}
#endif
- tty_vhangup(tty->link);
+
+ /*
+ * This hack is required because a program can open a
+ * pty and redirect a console to it, but if the pty is
+ * closed and the console is not released, then the
+ * slave side will never close. So release the
+ * redirect when the master closes.
+ */
+ f = tty_release_redirect(tty->link);
+ if (f)
+ fput(f);
}
}
diff --git a/drivers/tty/serial/8250/8250_tegra.c b/drivers/tty/serial/8250/8250_tegra.c
index c0ffad1572c6..e13ae18b0713 100644
--- a/drivers/tty/serial/8250/8250_tegra.c
+++ b/drivers/tty/serial/8250/8250_tegra.c
@@ -26,16 +26,17 @@ static void tegra_uart_handle_break(struct uart_port *p)
{
unsigned int status, tmout = 10000;
- do {
+ while (1) {
status = p->serial_in(p, UART_LSR);
- if (status & (UART_LSR_FIFOE | UART_LSR_BRK_ERROR_BITS))
- status = p->serial_in(p, UART_RX);
- else
+ if (!(status & (UART_LSR_FIFOE | UART_LSR_BRK_ERROR_BITS)))
break;
+
+ p->serial_in(p, UART_RX);
+
if (--tmout == 0)
break;
udelay(1);
- } while (1);
+ }
}
static int tegra_uart_probe(struct platform_device *pdev)
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 34a2899e69c0..0c4cd4a348f4 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -276,28 +276,6 @@ config SERIAL_SAMSUNG_CONSOLE
your boot loader about how to pass options to the kernel at
boot time.)
-config SERIAL_SIRFSOC
- tristate "SiRF SoC Platform Serial port support"
- depends on ARCH_SIRF
- select SERIAL_CORE
- help
- Support for the on-chip UART on the CSR SiRFprimaII series,
- providing /dev/ttySiRF0, 1 and 2 (note, some machines may not
- provide all of these ports, depending on how the serial port
- pins are configured).
-
-config SERIAL_SIRFSOC_CONSOLE
- bool "Support for console on SiRF SoC serial port"
- depends on SERIAL_SIRFSOC=y
- select SERIAL_CORE_CONSOLE
- help
- Even if you say Y here, the currently visible virtual console
- (/dev/tty0) will still be used as the system console by default, but
- you can alter that using a kernel command line option such as
- "console=ttySiRFx". (Try "man bootparam" or see the documentation of
- your boot loader about how to pass options to the kernel at
- boot time.)
-
config SERIAL_TEGRA
tristate "NVIDIA Tegra20/30 SoC serial controller"
depends on ARCH_TEGRA && TEGRA20_APB_DMA
@@ -1204,13 +1182,6 @@ config SERIAL_ALTERA_UART_CONSOLE
help
Enable a Altera UART port to be the system console.
-config SERIAL_IFX6X60
- tristate "SPI protocol driver for Infineon 6x60 modem (EXPERIMENTAL)"
- depends on GPIOLIB || COMPILE_TEST
- depends on SPI && HAS_DMA
- help
- Support for the IFX6x60 modem devices on Intel MID platforms.
-
config SERIAL_PCH_UART
tristate "Intel EG20T PCH/LAPIS Semicon IOH(ML7213/ML7223/ML7831) UART"
depends on PCI && (X86_32 || MIPS || COMPILE_TEST)
@@ -1295,14 +1266,6 @@ config SERIAL_AR933X_NR_UARTS
Set this to the number of serial ports you want the driver
to support.
-config SERIAL_EFM32_UART
- tristate "EFM32 UART/USART port"
- depends on ARM && (ARCH_EFM32 || COMPILE_TEST)
- select SERIAL_CORE
- help
- This driver support the USART and UART ports on
- Energy Micro's efm32 SoCs.
-
config SERIAL_MPS2_UART_CONSOLE
bool "MPS2 UART console support"
depends on SERIAL_MPS2_UART
@@ -1316,11 +1279,6 @@ config SERIAL_MPS2_UART
help
This driver support the UART ports on ARM MPS2.
-config SERIAL_EFM32_UART_CONSOLE
- bool "EFM32 UART/USART console support"
- depends on SERIAL_EFM32_UART=y
- select SERIAL_CORE_CONSOLE
-
config SERIAL_ARC
tristate "ARC UART driver support"
select SERIAL_CORE
diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile
index b85d53f9e9ff..7da0856cd198 100644
--- a/drivers/tty/serial/Makefile
+++ b/drivers/tty/serial/Makefile
@@ -64,16 +64,13 @@ obj-$(CONFIG_SERIAL_TIMBERDALE) += timbuart.o
obj-$(CONFIG_SERIAL_GRLIB_GAISLER_APBUART) += apbuart.o
obj-$(CONFIG_SERIAL_ALTERA_JTAGUART) += altera_jtaguart.o
obj-$(CONFIG_SERIAL_VT8500) += vt8500_serial.o
-obj-$(CONFIG_SERIAL_IFX6X60) += ifx6x60.o
obj-$(CONFIG_SERIAL_PCH_UART) += pch_uart.o
obj-$(CONFIG_SERIAL_MXS_AUART) += mxs-auart.o
obj-$(CONFIG_SERIAL_LANTIQ) += lantiq.o
obj-$(CONFIG_SERIAL_XILINX_PS_UART) += xilinx_uartps.o
-obj-$(CONFIG_SERIAL_SIRFSOC) += sirfsoc_uart.o
obj-$(CONFIG_SERIAL_TEGRA) += serial-tegra.o
obj-$(CONFIG_SERIAL_TEGRA_TCU) += tegra-tcu.o
obj-$(CONFIG_SERIAL_AR933X) += ar933x_uart.o
-obj-$(CONFIG_SERIAL_EFM32_UART) += efm32-uart.o
obj-$(CONFIG_SERIAL_ARC) += arc_uart.o
obj-$(CONFIG_SERIAL_RP2) += rp2.o
obj-$(CONFIG_SERIAL_FSL_LPUART) += fsl_lpuart.o
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
index 4df47d02b34b..58aaa533203b 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
@@ -499,8 +499,7 @@ static void cpm_uart_set_termios(struct uart_port *port,
pr_debug("CPM uart[%d]:set_termios\n", port->line);
baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16);
- if (baud < HW_BUF_SPD_THRESHOLD ||
- (pinfo->port.state && pinfo->port.state->port.low_latency))
+ if (baud < HW_BUF_SPD_THRESHOLD || port->flags & UPF_LOW_LATENCY)
pinfo->rx_fifosize = 1;
else
pinfo->rx_fifosize = RX_BUF_SIZE;
@@ -1107,6 +1106,32 @@ static void cpm_put_poll_char(struct uart_port *port,
ch[0] = (char)c;
cpm_uart_early_write(pinfo, ch, 1, false);
}
+
+static struct uart_port *udbg_port;
+
+static void udbg_cpm_putc(char c)
+{
+ if (c == '\n')
+ cpm_put_poll_char(udbg_port, '\r');
+ cpm_put_poll_char(udbg_port, c);
+}
+
+static int udbg_cpm_getc_poll(void)
+{
+ int c = cpm_get_poll_char(udbg_port);
+
+ return c == NO_POLL_CHAR ? -1 : c;
+}
+
+static int udbg_cpm_getc(void)
+{
+ int c;
+
+ while ((c = udbg_cpm_getc_poll()) == -1)
+ cpu_relax();
+ return c;
+}
+
#endif /* CONFIG_CONSOLE_POLL */
static const struct uart_ops cpm_uart_pops = {
@@ -1237,7 +1262,10 @@ static int cpm_uart_init_port(struct device_node *np,
}
#ifdef CONFIG_PPC_EARLY_DEBUG_CPM
- udbg_putc = NULL;
+#ifdef CONFIG_CONSOLE_POLL
+ if (!udbg_port)
+#endif
+ udbg_putc = NULL;
#endif
return cpm_uart_request_port(&pinfo->port);
@@ -1358,6 +1386,15 @@ static int __init cpm_uart_console_setup(struct console *co, char *options)
uart_set_options(port, co, baud, parity, bits, flow);
cpm_line_cr_cmd(pinfo, CPM_CR_RESTART_TX);
+#ifdef CONFIG_CONSOLE_POLL
+ if (!udbg_port) {
+ udbg_port = &pinfo->port;
+ udbg_putc = udbg_cpm_putc;
+ udbg_getc = udbg_cpm_getc;
+ udbg_getc_poll = udbg_cpm_getc_poll;
+ }
+#endif
+
return 0;
}
diff --git a/drivers/tty/serial/efm32-uart.c b/drivers/tty/serial/efm32-uart.c
deleted file mode 100644
index f12f29cf4f31..000000000000
--- a/drivers/tty/serial/efm32-uart.c
+++ /dev/null
@@ -1,852 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/io.h>
-#include <linux/platform_device.h>
-#include <linux/console.h>
-#include <linux/sysrq.h>
-#include <linux/serial_core.h>
-#include <linux/tty_flip.h>
-#include <linux/slab.h>
-#include <linux/clk.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-
-#include <linux/platform_data/efm32-uart.h>
-
-#define DRIVER_NAME "efm32-uart"
-#define DEV_NAME "ttyefm"
-
-#define UARTn_CTRL 0x00
-#define UARTn_CTRL_SYNC 0x0001
-#define UARTn_CTRL_TXBIL 0x1000
-
-#define UARTn_FRAME 0x04
-#define UARTn_FRAME_DATABITS__MASK 0x000f
-#define UARTn_FRAME_DATABITS(n) ((n) - 3)
-#define UARTn_FRAME_PARITY__MASK 0x0300
-#define UARTn_FRAME_PARITY_NONE 0x0000
-#define UARTn_FRAME_PARITY_EVEN 0x0200
-#define UARTn_FRAME_PARITY_ODD 0x0300
-#define UARTn_FRAME_STOPBITS_HALF 0x0000
-#define UARTn_FRAME_STOPBITS_ONE 0x1000
-#define UARTn_FRAME_STOPBITS_TWO 0x3000
-
-#define UARTn_CMD 0x0c
-#define UARTn_CMD_RXEN 0x0001
-#define UARTn_CMD_RXDIS 0x0002
-#define UARTn_CMD_TXEN 0x0004
-#define UARTn_CMD_TXDIS 0x0008
-
-#define UARTn_STATUS 0x10
-#define UARTn_STATUS_TXENS 0x0002
-#define UARTn_STATUS_TXC 0x0020
-#define UARTn_STATUS_TXBL 0x0040
-#define UARTn_STATUS_RXDATAV 0x0080
-
-#define UARTn_CLKDIV 0x14
-
-#define UARTn_RXDATAX 0x18
-#define UARTn_RXDATAX_RXDATA__MASK 0x01ff
-#define UARTn_RXDATAX_PERR 0x4000
-#define UARTn_RXDATAX_FERR 0x8000
-/*
- * This is a software only flag used for ignore_status_mask and
- * read_status_mask! It's used for breaks that the hardware doesn't report
- * explicitly.
- */
-#define SW_UARTn_RXDATAX_BERR 0x2000
-
-#define UARTn_TXDATA 0x34
-
-#define UARTn_IF 0x40
-#define UARTn_IF_TXC 0x0001
-#define UARTn_IF_TXBL 0x0002
-#define UARTn_IF_RXDATAV 0x0004
-#define UARTn_IF_RXOF 0x0010
-
-#define UARTn_IFS 0x44
-#define UARTn_IFC 0x48
-#define UARTn_IEN 0x4c
-
-#define UARTn_ROUTE 0x54
-#define UARTn_ROUTE_LOCATION__MASK 0x0700
-#define UARTn_ROUTE_LOCATION(n) (((n) << 8) & UARTn_ROUTE_LOCATION__MASK)
-#define UARTn_ROUTE_RXPEN 0x0001
-#define UARTn_ROUTE_TXPEN 0x0002
-
-struct efm32_uart_port {
- struct uart_port port;
- unsigned int txirq;
- struct clk *clk;
- struct efm32_uart_pdata pdata;
-};
-#define to_efm_port(_port) container_of(_port, struct efm32_uart_port, port)
-#define efm_debug(efm_port, format, arg...) \
- dev_dbg(efm_port->port.dev, format, ##arg)
-
-static void efm32_uart_write32(struct efm32_uart_port *efm_port,
- u32 value, unsigned offset)
-{
- writel_relaxed(value, efm_port->port.membase + offset);
-}
-
-static u32 efm32_uart_read32(struct efm32_uart_port *efm_port,
- unsigned offset)
-{
- return readl_relaxed(efm_port->port.membase + offset);
-}
-
-static unsigned int efm32_uart_tx_empty(struct uart_port *port)
-{
- struct efm32_uart_port *efm_port = to_efm_port(port);
- u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);
-
- if (status & UARTn_STATUS_TXC)
- return TIOCSER_TEMT;
- else
- return 0;
-}
-
-static void efm32_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
- /* sorry, neither handshaking lines nor loop functionallity */
-}
-
-static unsigned int efm32_uart_get_mctrl(struct uart_port *port)
-{
- /* sorry, no handshaking lines available */
- return TIOCM_CAR | TIOCM_CTS | TIOCM_DSR;
-}
-
-static void efm32_uart_stop_tx(struct uart_port *port)
-{
- struct efm32_uart_port *efm_port = to_efm_port(port);
- u32 ien = efm32_uart_read32(efm_port, UARTn_IEN);
-
- efm32_uart_write32(efm_port, UARTn_CMD_TXDIS, UARTn_CMD);
- ien &= ~(UARTn_IF_TXC | UARTn_IF_TXBL);
- efm32_uart_write32(efm_port, ien, UARTn_IEN);
-}
-
-static void efm32_uart_tx_chars(struct efm32_uart_port *efm_port)
-{
- struct uart_port *port = &efm_port->port;
- struct circ_buf *xmit = &port->state->xmit;
-
- while (efm32_uart_read32(efm_port, UARTn_STATUS) &
- UARTn_STATUS_TXBL) {
- if (port->x_char) {
- port->icount.tx++;
- efm32_uart_write32(efm_port, port->x_char,
- UARTn_TXDATA);
- port->x_char = 0;
- continue;
- }
- if (!uart_circ_empty(xmit) && !uart_tx_stopped(port)) {
- port->icount.tx++;
- efm32_uart_write32(efm_port, xmit->buf[xmit->tail],
- UARTn_TXDATA);
- xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
- } else
- break;
- }
-
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
- uart_write_wakeup(port);
-
- if (!port->x_char && uart_circ_empty(xmit) &&
- efm32_uart_read32(efm_port, UARTn_STATUS) &
- UARTn_STATUS_TXC)
- efm32_uart_stop_tx(port);
-}
-
-static void efm32_uart_start_tx(struct uart_port *port)
-{
- struct efm32_uart_port *efm_port = to_efm_port(port);
- u32 ien;
-
- efm32_uart_write32(efm_port,
- UARTn_IF_TXBL | UARTn_IF_TXC, UARTn_IFC);
- ien = efm32_uart_read32(efm_port, UARTn_IEN);
- efm32_uart_write32(efm_port,
- ien | UARTn_IF_TXBL | UARTn_IF_TXC, UARTn_IEN);
- efm32_uart_write32(efm_port, UARTn_CMD_TXEN, UARTn_CMD);
-
- efm32_uart_tx_chars(efm_port);
-}
-
-static void efm32_uart_stop_rx(struct uart_port *port)
-{
- struct efm32_uart_port *efm_port = to_efm_port(port);
-
- efm32_uart_write32(efm_port, UARTn_CMD_RXDIS, UARTn_CMD);
-}
-
-static void efm32_uart_break_ctl(struct uart_port *port, int ctl)
-{
- /* not possible without fiddling with gpios */
-}
-
-static void efm32_uart_rx_chars(struct efm32_uart_port *efm_port)
-{
- struct uart_port *port = &efm_port->port;
-
- while (efm32_uart_read32(efm_port, UARTn_STATUS) &
- UARTn_STATUS_RXDATAV) {
- u32 rxdata = efm32_uart_read32(efm_port, UARTn_RXDATAX);
- int flag = 0;
-
- /*
- * This is a reserved bit and I only saw it read as 0. But to be
- * sure not to be confused too much by new devices adhere to the
- * warning in the reference manual that reserved bits might
- * read as 1 in the future.
- */
- rxdata &= ~SW_UARTn_RXDATAX_BERR;
-
- port->icount.rx++;
-
- if ((rxdata & UARTn_RXDATAX_FERR) &&
- !(rxdata & UARTn_RXDATAX_RXDATA__MASK)) {
- rxdata |= SW_UARTn_RXDATAX_BERR;
- port->icount.brk++;
- if (uart_handle_break(port))
- continue;
- } else if (rxdata & UARTn_RXDATAX_PERR)
- port->icount.parity++;
- else if (rxdata & UARTn_RXDATAX_FERR)
- port->icount.frame++;
-
- rxdata &= port->read_status_mask;
-
- if (rxdata & SW_UARTn_RXDATAX_BERR)
- flag = TTY_BREAK;
- else if (rxdata & UARTn_RXDATAX_PERR)
- flag = TTY_PARITY;
- else if (rxdata & UARTn_RXDATAX_FERR)
- flag = TTY_FRAME;
- else if (uart_handle_sysrq_char(port,
- rxdata & UARTn_RXDATAX_RXDATA__MASK))
- continue;
-
- if ((rxdata & port->ignore_status_mask) == 0)
- tty_insert_flip_char(&port->state->port,
- rxdata & UARTn_RXDATAX_RXDATA__MASK, flag);
- }
-}
-
-static irqreturn_t efm32_uart_rxirq(int irq, void *data)
-{
- struct efm32_uart_port *efm_port = data;
- u32 irqflag = efm32_uart_read32(efm_port, UARTn_IF);
- int handled = IRQ_NONE;
- struct uart_port *port = &efm_port->port;
- struct tty_port *tport = &port->state->port;
-
- spin_lock(&port->lock);
-
- if (irqflag & UARTn_IF_RXDATAV) {
- efm32_uart_write32(efm_port, UARTn_IF_RXDATAV, UARTn_IFC);
- efm32_uart_rx_chars(efm_port);
-
- handled = IRQ_HANDLED;
- }
-
- if (irqflag & UARTn_IF_RXOF) {
- efm32_uart_write32(efm_port, UARTn_IF_RXOF, UARTn_IFC);
- port->icount.overrun++;
- tty_insert_flip_char(tport, 0, TTY_OVERRUN);
-
- handled = IRQ_HANDLED;
- }
-
- spin_unlock(&port->lock);
-
- tty_flip_buffer_push(tport);
-
- return handled;
-}
-
-static irqreturn_t efm32_uart_txirq(int irq, void *data)
-{
- struct efm32_uart_port *efm_port = data;
- u32 irqflag = efm32_uart_read32(efm_port, UARTn_IF);
-
- /* TXBL doesn't need to be cleared */
- if (irqflag & UARTn_IF_TXC)
- efm32_uart_write32(efm_port, UARTn_IF_TXC, UARTn_IFC);
-
- if (irqflag & (UARTn_IF_TXC | UARTn_IF_TXBL)) {
- efm32_uart_tx_chars(efm_port);
- return IRQ_HANDLED;
- } else
- return IRQ_NONE;
-}
-
-static int efm32_uart_startup(struct uart_port *port)
-{
- struct efm32_uart_port *efm_port = to_efm_port(port);
- int ret;
-
- ret = clk_enable(efm_port->clk);
- if (ret) {
- efm_debug(efm_port, "failed to enable clk\n");
- goto err_clk_enable;
- }
- port->uartclk = clk_get_rate(efm_port->clk);
-
- /* Enable pins at configured location */
- efm32_uart_write32(efm_port,
- UARTn_ROUTE_LOCATION(efm_port->pdata.location) |
- UARTn_ROUTE_RXPEN | UARTn_ROUTE_TXPEN,
- UARTn_ROUTE);
-
- ret = request_irq(port->irq, efm32_uart_rxirq, 0,
- DRIVER_NAME, efm_port);
- if (ret) {
- efm_debug(efm_port, "failed to register rxirq\n");
- goto err_request_irq_rx;
- }
-
- /* disable all irqs */
- efm32_uart_write32(efm_port, 0, UARTn_IEN);
-
- ret = request_irq(efm_port->txirq, efm32_uart_txirq, 0,
- DRIVER_NAME, efm_port);
- if (ret) {
- efm_debug(efm_port, "failed to register txirq\n");
- free_irq(port->irq, efm_port);
-err_request_irq_rx:
-
- clk_disable(efm_port->clk);
- } else {
- efm32_uart_write32(efm_port,
- UARTn_IF_RXDATAV | UARTn_IF_RXOF, UARTn_IEN);
- efm32_uart_write32(efm_port, UARTn_CMD_RXEN, UARTn_CMD);
- }
-
-err_clk_enable:
- return ret;
-}
-
-static void efm32_uart_shutdown(struct uart_port *port)
-{
- struct efm32_uart_port *efm_port = to_efm_port(port);
-
- efm32_uart_write32(efm_port, 0, UARTn_IEN);
- free_irq(port->irq, efm_port);
-
- clk_disable(efm_port->clk);
-}
-
-static void efm32_uart_set_termios(struct uart_port *port,
- struct ktermios *new, struct ktermios *old)
-{
- struct efm32_uart_port *efm_port = to_efm_port(port);
- unsigned long flags;
- unsigned baud;
- u32 clkdiv;
- u32 frame = 0;
-
- /* no modem control lines */
- new->c_cflag &= ~(CRTSCTS | CMSPAR);
-
- baud = uart_get_baud_rate(port, new, old,
- DIV_ROUND_CLOSEST(port->uartclk, 16 * 8192),
- DIV_ROUND_CLOSEST(port->uartclk, 16));
-
- switch (new->c_cflag & CSIZE) {
- case CS5:
- frame |= UARTn_FRAME_DATABITS(5);
- break;
- case CS6:
- frame |= UARTn_FRAME_DATABITS(6);
- break;
- case CS7:
- frame |= UARTn_FRAME_DATABITS(7);
- break;
- case CS8:
- frame |= UARTn_FRAME_DATABITS(8);
- break;
- }
-
- if (new->c_cflag & CSTOPB)
- /* the receiver only verifies the first stop bit */
- frame |= UARTn_FRAME_STOPBITS_TWO;
- else
- frame |= UARTn_FRAME_STOPBITS_ONE;
-
- if (new->c_cflag & PARENB) {
- if (new->c_cflag & PARODD)
- frame |= UARTn_FRAME_PARITY_ODD;
- else
- frame |= UARTn_FRAME_PARITY_EVEN;
- } else
- frame |= UARTn_FRAME_PARITY_NONE;
-
- /*
- * the 6 lowest bits of CLKDIV are dc, bit 6 has value 0.25.
- * port->uartclk <= 14e6, so 4 * port->uartclk doesn't overflow.
- */
- clkdiv = (DIV_ROUND_CLOSEST(4 * port->uartclk, 16 * baud) - 4) << 6;
-
- spin_lock_irqsave(&port->lock, flags);
-
- efm32_uart_write32(efm_port,
- UARTn_CMD_TXDIS | UARTn_CMD_RXDIS, UARTn_CMD);
-
- port->read_status_mask = UARTn_RXDATAX_RXDATA__MASK;
- if (new->c_iflag & INPCK)
- port->read_status_mask |=
- UARTn_RXDATAX_FERR | UARTn_RXDATAX_PERR;
- if (new->c_iflag & (IGNBRK | BRKINT | PARMRK))
- port->read_status_mask |= SW_UARTn_RXDATAX_BERR;
-
- port->ignore_status_mask = 0;
- if (new->c_iflag & IGNPAR)
- port->ignore_status_mask |=
- UARTn_RXDATAX_FERR | UARTn_RXDATAX_PERR;
- if (new->c_iflag & IGNBRK)
- port->ignore_status_mask |= SW_UARTn_RXDATAX_BERR;
-
- uart_update_timeout(port, new->c_cflag, baud);
-
- efm32_uart_write32(efm_port, UARTn_CTRL_TXBIL, UARTn_CTRL);
- efm32_uart_write32(efm_port, frame, UARTn_FRAME);
- efm32_uart_write32(efm_port, clkdiv, UARTn_CLKDIV);
-
- efm32_uart_write32(efm_port, UARTn_CMD_TXEN | UARTn_CMD_RXEN,
- UARTn_CMD);
-
- spin_unlock_irqrestore(&port->lock, flags);
-}
-
-static const char *efm32_uart_type(struct uart_port *port)
-{
- return port->type == PORT_EFMUART ? "efm32-uart" : NULL;
-}
-
-static void efm32_uart_release_port(struct uart_port *port)
-{
- struct efm32_uart_port *efm_port = to_efm_port(port);
-
- clk_unprepare(efm_port->clk);
- clk_put(efm_port->clk);
- iounmap(port->membase);
-}
-
-static int efm32_uart_request_port(struct uart_port *port)
-{
- struct efm32_uart_port *efm_port = to_efm_port(port);
- int ret;
-
- port->membase = ioremap(port->mapbase, 60);
- if (!efm_port->port.membase) {
- ret = -ENOMEM;
- efm_debug(efm_port, "failed to remap\n");
- goto err_ioremap;
- }
-
- efm_port->clk = clk_get(port->dev, NULL);
- if (IS_ERR(efm_port->clk)) {
- ret = PTR_ERR(efm_port->clk);
- efm_debug(efm_port, "failed to get clock\n");
- goto err_clk_get;
- }
-
- ret = clk_prepare(efm_port->clk);
- if (ret) {
- clk_put(efm_port->clk);
-err_clk_get:
-
- iounmap(port->membase);
-err_ioremap:
- return ret;
- }
- return 0;
-}
-
-static void efm32_uart_config_port(struct uart_port *port, int type)
-{
- if (type & UART_CONFIG_TYPE &&
- !efm32_uart_request_port(port))
- port->type = PORT_EFMUART;
-}
-
-static int efm32_uart_verify_port(struct uart_port *port,
- struct serial_struct *serinfo)
-{
- int ret = 0;
-
- if (serinfo->type != PORT_UNKNOWN && serinfo->type != PORT_EFMUART)
- ret = -EINVAL;
-
- return ret;
-}
-
-static const struct uart_ops efm32_uart_pops = {
- .tx_empty = efm32_uart_tx_empty,
- .set_mctrl = efm32_uart_set_mctrl,
- .get_mctrl = efm32_uart_get_mctrl,
- .stop_tx = efm32_uart_stop_tx,
- .start_tx = efm32_uart_start_tx,
- .stop_rx = efm32_uart_stop_rx,
- .break_ctl = efm32_uart_break_ctl,
- .startup = efm32_uart_startup,
- .shutdown = efm32_uart_shutdown,
- .set_termios = efm32_uart_set_termios,
- .type = efm32_uart_type,
- .release_port = efm32_uart_release_port,
- .request_port = efm32_uart_request_port,
- .config_port = efm32_uart_config_port,
- .verify_port = efm32_uart_verify_port,
-};
-
-static struct efm32_uart_port *efm32_uart_ports[5];
-
-#ifdef CONFIG_SERIAL_EFM32_UART_CONSOLE
-static void efm32_uart_console_putchar(struct uart_port *port, int ch)
-{
- struct efm32_uart_port *efm_port = to_efm_port(port);
- unsigned int timeout = 0x400;
- u32 status;
-
- while (1) {
- status = efm32_uart_read32(efm_port, UARTn_STATUS);
-
- if (status & UARTn_STATUS_TXBL)
- break;
- if (!timeout--)
- return;
- }
- efm32_uart_write32(efm_port, ch, UARTn_TXDATA);
-}
-
-static void efm32_uart_console_write(struct console *co, const char *s,
- unsigned int count)
-{
- struct efm32_uart_port *efm_port = efm32_uart_ports[co->index];
- u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);
- unsigned int timeout = 0x400;
-
- if (!(status & UARTn_STATUS_TXENS))
- efm32_uart_write32(efm_port, UARTn_CMD_TXEN, UARTn_CMD);
-
- uart_console_write(&efm_port->port, s, count,
- efm32_uart_console_putchar);
-
- /* Wait for the transmitter to become empty */
- while (1) {
- u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);
- if (status & UARTn_STATUS_TXC)
- break;
- if (!timeout--)
- break;
- }
-
- if (!(status & UARTn_STATUS_TXENS))
- efm32_uart_write32(efm_port, UARTn_CMD_TXDIS, UARTn_CMD);
-}
-
-static void efm32_uart_console_get_options(struct efm32_uart_port *efm_port,
- int *baud, int *parity, int *bits)
-{
- u32 ctrl = efm32_uart_read32(efm_port, UARTn_CTRL);
- u32 route, clkdiv, frame;
-
- if (ctrl & UARTn_CTRL_SYNC)
- /* not operating in async mode */
- return;
-
- route = efm32_uart_read32(efm_port, UARTn_ROUTE);
- if (!(route & UARTn_ROUTE_TXPEN))
- /* tx pin not routed */
- return;
-
- clkdiv = efm32_uart_read32(efm_port, UARTn_CLKDIV);
-
- *baud = DIV_ROUND_CLOSEST(4 * efm_port->port.uartclk,
- 16 * (4 + (clkdiv >> 6)));
-
- frame = efm32_uart_read32(efm_port, UARTn_FRAME);
- switch (frame & UARTn_FRAME_PARITY__MASK) {
- case UARTn_FRAME_PARITY_ODD:
- *parity = 'o';
- break;
- case UARTn_FRAME_PARITY_EVEN:
- *parity = 'e';
- break;
- default:
- *parity = 'n';
- }
-
- *bits = (frame & UARTn_FRAME_DATABITS__MASK) -
- UARTn_FRAME_DATABITS(4) + 4;
-
- efm_debug(efm_port, "get_opts: options=%d%c%d\n",
- *baud, *parity, *bits);
-}
-
-static int efm32_uart_console_setup(struct console *co, char *options)
-{
- struct efm32_uart_port *efm_port;
- int baud = 115200;
- int bits = 8;
- int parity = 'n';
- int flow = 'n';
- int ret;
-
- if (co->index < 0 || co->index >= ARRAY_SIZE(efm32_uart_ports)) {
- unsigned i;
- for (i = 0; i < ARRAY_SIZE(efm32_uart_ports); ++i) {
- if (efm32_uart_ports[i]) {
- pr_warn("efm32-console: fall back to console index %u (from %hhi)\n",
- i, co->index);
- co->index = i;
- break;
- }
- }
- }
-
- efm_port = efm32_uart_ports[co->index];
- if (!efm_port) {
- pr_warn("efm32-console: No port at %d\n", co->index);
- return -ENODEV;
- }
-
- ret = clk_prepare(efm_port->clk);
- if (ret) {
- dev_warn(efm_port->port.dev,
- "console: clk_prepare failed: %d\n", ret);
- return ret;
- }
-
- efm_port->port.uartclk = clk_get_rate(efm_port->clk);
-
- if (options)
- uart_parse_options(options, &baud, &parity, &bits, &flow);
- else
- efm32_uart_console_get_options(efm_port,
- &baud, &parity, &bits);
-
- return uart_set_options(&efm_port->port, co, baud, parity, bits, flow);
-}
-
-static struct uart_driver efm32_uart_reg;
-
-static struct console efm32_uart_console = {
- .name = DEV_NAME,
- .write = efm32_uart_console_write,
- .device = uart_console_device,
- .setup = efm32_uart_console_setup,
- .flags = CON_PRINTBUFFER,
- .index = -1,
- .data = &efm32_uart_reg,
-};
-
-#else
-#define efm32_uart_console (*(struct console *)NULL)
-#endif /* ifdef CONFIG_SERIAL_EFM32_UART_CONSOLE / else */
-
-static struct uart_driver efm32_uart_reg = {
- .owner = THIS_MODULE,
- .driver_name = DRIVER_NAME,
- .dev_name = DEV_NAME,
- .nr = ARRAY_SIZE(efm32_uart_ports),
- .cons = &efm32_uart_console,
-};
-
-static int efm32_uart_probe_dt(struct platform_device *pdev,
- struct efm32_uart_port *efm_port)
-{
- struct device_node *np = pdev->dev.of_node;
- u32 location;
- int ret;
-
- if (!np)
- return 1;
-
- ret = of_property_read_u32(np, "energymicro,location", &location);
-
- if (ret)
- /* fall back to wrongly namespaced property */
- ret = of_property_read_u32(np, "efm32,location", &location);
-
- if (ret)
- /* fall back to old and (wrongly) generic property "location" */
- ret = of_property_read_u32(np, "location", &location);
-
- if (!ret) {
- if (location > 5) {
- dev_err(&pdev->dev, "invalid location\n");
- return -EINVAL;
- }
- efm_debug(efm_port, "using location %u\n", location);
- efm_port->pdata.location = location;
- } else {
- efm_debug(efm_port, "fall back to location 0\n");
- }
-
- ret = of_alias_get_id(np, "serial");
- if (ret < 0) {
- dev_err(&pdev->dev, "failed to get alias id: %d\n", ret);
- return ret;
- } else {
- efm_port->port.line = ret;
- return 0;
- }
-
-}
-
-static int efm32_uart_probe(struct platform_device *pdev)
-{
- struct efm32_uart_port *efm_port;
- struct resource *res;
- unsigned int line;
- int ret;
-
- efm_port = kzalloc(sizeof(*efm_port), GFP_KERNEL);
- if (!efm_port) {
- dev_dbg(&pdev->dev, "failed to allocate private data\n");
- return -ENOMEM;
- }
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- ret = -ENODEV;
- dev_dbg(&pdev->dev, "failed to determine base address\n");
- goto err_get_base;
- }
-
- if (resource_size(res) < 60) {
- ret = -EINVAL;
- dev_dbg(&pdev->dev, "memory resource too small\n");
- goto err_too_small;
- }
-
- ret = platform_get_irq(pdev, 0);
- if (ret <= 0) {
- dev_dbg(&pdev->dev, "failed to get rx irq\n");
- goto err_get_rxirq;
- }
-
- efm_port->port.irq = ret;
-
- ret = platform_get_irq(pdev, 1);
- if (ret <= 0)
- ret = efm_port->port.irq + 1;
-
- efm_port->txirq = ret;
-
- efm_port->port.dev = &pdev->dev;
- efm_port->port.mapbase = res->start;
- efm_port->port.type = PORT_EFMUART;
- efm_port->port.iotype = UPIO_MEM32;
- efm_port->port.fifosize = 2;
- efm_port->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_EFM32_UART_CONSOLE);
- efm_port->port.ops = &efm32_uart_pops;
- efm_port->port.flags = UPF_BOOT_AUTOCONF;
-
- ret = efm32_uart_probe_dt(pdev, efm_port);
- if (ret > 0) {
- /* not created by device tree */
- const struct efm32_uart_pdata *pdata = dev_get_platdata(&pdev->dev);
-
- efm_port->port.line = pdev->id;
-
- if (pdata)
- efm_port->pdata = *pdata;
- } else if (ret < 0)
- goto err_probe_dt;
-
- line = efm_port->port.line;
-
- if (line >= 0 && line < ARRAY_SIZE(efm32_uart_ports))
- efm32_uart_ports[line] = efm_port;
-
- ret = uart_add_one_port(&efm32_uart_reg, &efm_port->port);
- if (ret) {
- dev_dbg(&pdev->dev, "failed to add port: %d\n", ret);
-
- if (line >= 0 && line < ARRAY_SIZE(efm32_uart_ports))
- efm32_uart_ports[line] = NULL;
-err_probe_dt:
-err_get_rxirq:
-err_too_small:
-err_get_base:
- kfree(efm_port);
- } else {
- platform_set_drvdata(pdev, efm_port);
- dev_dbg(&pdev->dev, "\\o/\n");
- }
-
- return ret;
-}
-
-static int efm32_uart_remove(struct platform_device *pdev)
-{
- struct efm32_uart_port *efm_port = platform_get_drvdata(pdev);
- unsigned int line = efm_port->port.line;
-
- uart_remove_one_port(&efm32_uart_reg, &efm_port->port);
-
- if (line >= 0 && line < ARRAY_SIZE(efm32_uart_ports))
- efm32_uart_ports[line] = NULL;
-
- kfree(efm_port);
-
- return 0;
-}
-
-static const struct of_device_id efm32_uart_dt_ids[] = {
- {
- .compatible = "energymicro,efm32-uart",
- }, {
- /* doesn't follow the "vendor,device" scheme, don't use */
- .compatible = "efm32,uart",
- }, {
- /* sentinel */
- }
-};
-MODULE_DEVICE_TABLE(of, efm32_uart_dt_ids);
-
-static struct platform_driver efm32_uart_driver = {
- .probe = efm32_uart_probe,
- .remove = efm32_uart_remove,
-
- .driver = {
- .name = DRIVER_NAME,
- .of_match_table = efm32_uart_dt_ids,
- },
-};
-
-static int __init efm32_uart_init(void)
-{
- int ret;
-
- ret = uart_register_driver(&efm32_uart_reg);
- if (ret)
- return ret;
-
- ret = platform_driver_register(&efm32_uart_driver);
- if (ret)
- uart_unregister_driver(&efm32_uart_reg);
-
- pr_info("EFM32 UART/USART driver\n");
-
- return ret;
-}
-module_init(efm32_uart_init);
-
-static void __exit efm32_uart_exit(void)
-{
- platform_driver_unregister(&efm32_uart_driver);
- uart_unregister_driver(&efm32_uart_reg);
-}
-module_exit(efm32_uart_exit);
-
-MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>");
-MODULE_DESCRIPTION("EFM32 UART/USART driver");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index bd047e1f9bea..794035041744 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -2580,9 +2580,7 @@ static struct uart_driver lpuart_reg = {
static int lpuart_probe(struct platform_device *pdev)
{
- const struct of_device_id *of_id = of_match_device(lpuart_dt_ids,
- &pdev->dev);
- const struct lpuart_soc_data *sdata = of_id->data;
+ const struct lpuart_soc_data *sdata = of_device_get_match_data(&pdev->dev);
struct device_node *np = pdev->dev.of_node;
struct lpuart_port *sport;
struct resource *res;
diff --git a/drivers/tty/serial/icom.c b/drivers/tty/serial/icom.c
index 94c8281ddb5f..9a872750581c 100644
--- a/drivers/tty/serial/icom.c
+++ b/drivers/tty/serial/icom.c
@@ -118,7 +118,7 @@ MODULE_DEVICE_TABLE(pci, icom_pci_table);
static LIST_HEAD(icom_adapter_head);
/* spinlock for adapter initialization and changing adapter operations */
-static spinlock_t icom_lock;
+static DEFINE_SPINLOCK(icom_lock);
#ifdef ICOM_TRACE
static inline void trace(struct icom_port *icom_port, char *trace_pt,
@@ -1616,8 +1616,6 @@ static int __init icom_init(void)
{
int ret;
- spin_lock_init(&icom_lock);
-
ret = uart_register_driver(&icom_uart_driver);
if (ret)
return ret;
diff --git a/drivers/tty/serial/ifx6x60.c b/drivers/tty/serial/ifx6x60.c
deleted file mode 100644
index 182e0ccd60b2..000000000000
--- a/drivers/tty/serial/ifx6x60.c
+++ /dev/null
@@ -1,1390 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/****************************************************************************
- *
- * Driver for the IFX 6x60 spi modem.
- *
- * Copyright (C) 2008 Option International
- * Copyright (C) 2008 Filip Aben <f.aben@option.com>
- * Denis Joseph Barrow <d.barow@option.com>
- * Jan Dumon <j.dumon@option.com>
- *
- * Copyright (C) 2009, 2010 Intel Corp
- * Russ Gorby <russ.gorby@intel.com>
- *
- * Driver modified by Intel from Option gtm501l_spi.c
- *
- * Notes
- * o The driver currently assumes a single device only. If you need to
- * change this then look for saved_ifx_dev and add a device lookup
- * o The driver is intended to be big-endian safe but has never been
- * tested that way (no suitable hardware). There are a couple of FIXME
- * notes by areas that may need addressing
- * o Some of the GPIO naming/setup assumptions may need revisiting if
- * you need to use this driver for another platform.
- *
- *****************************************************************************/
-#include <linux/dma-mapping.h>
-#include <linux/module.h>
-#include <linux/termios.h>
-#include <linux/tty.h>
-#include <linux/device.h>
-#include <linux/spi/spi.h>
-#include <linux/kfifo.h>
-#include <linux/tty_flip.h>
-#include <linux/timer.h>
-#include <linux/serial.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/rfkill.h>
-#include <linux/fs.h>
-#include <linux/ip.h>
-#include <linux/dmapool.h>
-#include <linux/gpio/consumer.h>
-#include <linux/sched.h>
-#include <linux/time.h>
-#include <linux/wait.h>
-#include <linux/pm.h>
-#include <linux/pm_runtime.h>
-#include <linux/spi/ifx_modem.h>
-#include <linux/delay.h>
-#include <linux/reboot.h>
-
-#include "ifx6x60.h"
-
-#define IFX_SPI_MORE_MASK 0x10
-#define IFX_SPI_MORE_BIT 4 /* bit position in u8 */
-#define IFX_SPI_CTS_BIT 6 /* bit position in u8 */
-#define IFX_SPI_MODE SPI_MODE_1
-#define IFX_SPI_TTY_ID 0
-#define IFX_SPI_TIMEOUT_SEC 2
-#define IFX_SPI_HEADER_0 (-1)
-#define IFX_SPI_HEADER_F (-2)
-
-#define PO_POST_DELAY 200
-
-/* forward reference */
-static void ifx_spi_handle_srdy(struct ifx_spi_device *ifx_dev);
-static int ifx_modem_reboot_callback(struct notifier_block *nfb,
- unsigned long event, void *data);
-static int ifx_modem_power_off(struct ifx_spi_device *ifx_dev);
-
-/* local variables */
-static int spi_bpw = 16; /* 8, 16 or 32 bit word length */
-static struct tty_driver *tty_drv;
-static struct ifx_spi_device *saved_ifx_dev;
-static struct lock_class_key ifx_spi_key;
-
-static struct notifier_block ifx_modem_reboot_notifier_block = {
- .notifier_call = ifx_modem_reboot_callback,
-};
-
-static int ifx_modem_power_off(struct ifx_spi_device *ifx_dev)
-{
- gpiod_set_value(ifx_dev->gpio.pmu_reset, 1);
- msleep(PO_POST_DELAY);
-
- return 0;
-}
-
-static int ifx_modem_reboot_callback(struct notifier_block *nfb,
- unsigned long event, void *data)
-{
- if (saved_ifx_dev)
- ifx_modem_power_off(saved_ifx_dev);
- else
- pr_warn("no ifx modem active;\n");
-
- return NOTIFY_OK;
-}
-
-/* GPIO/GPE settings */
-
-/**
- * mrdy_set_high - set MRDY GPIO
- * @ifx: device we are controlling
- *
- */
-static inline void mrdy_set_high(struct ifx_spi_device *ifx)
-{
- gpiod_set_value(ifx->gpio.mrdy, 1);
-}
-
-/**
- * mrdy_set_low - clear MRDY GPIO
- * @ifx: device we are controlling
- *
- */
-static inline void mrdy_set_low(struct ifx_spi_device *ifx)
-{
- gpiod_set_value(ifx->gpio.mrdy, 0);
-}
-
-/**
- * ifx_spi_power_state_set
- * @ifx_dev: our SPI device
- * @val: bits to set
- *
- * Set bit in power status and signal power system if status becomes non-0
- */
-static void
-ifx_spi_power_state_set(struct ifx_spi_device *ifx_dev, unsigned char val)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&ifx_dev->power_lock, flags);
-
- /*
- * if power status is already non-0, just update, else
- * tell power system
- */
- if (!ifx_dev->power_status)
- pm_runtime_get(&ifx_dev->spi_dev->dev);
- ifx_dev->power_status |= val;
-
- spin_unlock_irqrestore(&ifx_dev->power_lock, flags);
-}
-
-/**
- * ifx_spi_power_state_clear - clear power bit
- * @ifx_dev: our SPI device
- * @val: bits to clear
- *
- * clear bit in power status and signal power system if status becomes 0
- */
-static void
-ifx_spi_power_state_clear(struct ifx_spi_device *ifx_dev, unsigned char val)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&ifx_dev->power_lock, flags);
-
- if (ifx_dev->power_status) {
- ifx_dev->power_status &= ~val;
- if (!ifx_dev->power_status)
- pm_runtime_put(&ifx_dev->spi_dev->dev);
- }
-
- spin_unlock_irqrestore(&ifx_dev->power_lock, flags);
-}
-
-/**
- * swap_buf_8
- * @buf: our buffer
- * @len : number of bytes (not words) in the buffer
- * @end: end of buffer
- *
- * Swap the contents of a buffer into big endian format
- */
-static inline void swap_buf_8(unsigned char *buf, int len, void *end)
-{
- /* don't swap buffer if SPI word width is 8 bits */
- return;
-}
-
-/**
- * swap_buf_16
- * @buf: our buffer
- * @len : number of bytes (not words) in the buffer
- * @end: end of buffer
- *
- * Swap the contents of a buffer into big endian format
- */
-static inline void swap_buf_16(unsigned char *buf, int len, void *end)
-{
- int n;
-
- u16 *buf_16 = (u16 *)buf;
- len = ((len + 1) >> 1);
- if ((void *)&buf_16[len] > end) {
- pr_err("swap_buf_16: swap exceeds boundary (%p > %p)!",
- &buf_16[len], end);
- return;
- }
- for (n = 0; n < len; n++) {
- *buf_16 = cpu_to_be16(*buf_16);
- buf_16++;
- }
-}
-
-/**
- * swap_buf_32
- * @buf: our buffer
- * @len : number of bytes (not words) in the buffer
- * @end: end of buffer
- *
- * Swap the contents of a buffer into big endian format
- */
-static inline void swap_buf_32(unsigned char *buf, int len, void *end)
-{
- int n;
-
- u32 *buf_32 = (u32 *)buf;
- len = (len + 3) >> 2;
-
- if ((void *)&buf_32[len] > end) {
- pr_err("swap_buf_32: swap exceeds boundary (%p > %p)!\n",
- &buf_32[len], end);
- return;
- }
- for (n = 0; n < len; n++) {
- *buf_32 = cpu_to_be32(*buf_32);
- buf_32++;
- }
-}
-
-/**
- * mrdy_assert - assert MRDY line
- * @ifx_dev: our SPI device
- *
- * Assert mrdy and set timer to wait for SRDY interrupt, if SRDY is low
- * now.
- *
- * FIXME: Can SRDY even go high as we are running this code ?
- */
-static void mrdy_assert(struct ifx_spi_device *ifx_dev)
-{
- int val = gpiod_get_value(ifx_dev->gpio.srdy);
- if (!val) {
- if (!test_and_set_bit(IFX_SPI_STATE_TIMER_PENDING,
- &ifx_dev->flags)) {
- mod_timer(&ifx_dev->spi_timer,jiffies + IFX_SPI_TIMEOUT_SEC*HZ);
-
- }
- }
- ifx_spi_power_state_set(ifx_dev, IFX_SPI_POWER_DATA_PENDING);
- mrdy_set_high(ifx_dev);
-}
-
-/**
- * ifx_spi_timeout - SPI timeout
- * @t: timer in our SPI device
- *
- * The SPI has timed out: hang up the tty. Users will then see a hangup
- * and error events.
- */
-static void ifx_spi_timeout(struct timer_list *t)
-{
- struct ifx_spi_device *ifx_dev = from_timer(ifx_dev, t, spi_timer);
-
- dev_warn(&ifx_dev->spi_dev->dev, "*** SPI Timeout ***");
- tty_port_tty_hangup(&ifx_dev->tty_port, false);
- mrdy_set_low(ifx_dev);
- clear_bit(IFX_SPI_STATE_TIMER_PENDING, &ifx_dev->flags);
-}
-
-/* char/tty operations */
-
-/**
- * ifx_spi_tiocmget - get modem lines
- * @tty: our tty device
- *
- * Map the signal state into Linux modem flags and report the value
- * in Linux terms
- */
-static int ifx_spi_tiocmget(struct tty_struct *tty)
-{
- unsigned int value;
- struct ifx_spi_device *ifx_dev = tty->driver_data;
-
- value =
- (test_bit(IFX_SPI_RTS, &ifx_dev->signal_state) ? TIOCM_RTS : 0) |
- (test_bit(IFX_SPI_DTR, &ifx_dev->signal_state) ? TIOCM_DTR : 0) |
- (test_bit(IFX_SPI_CTS, &ifx_dev->signal_state) ? TIOCM_CTS : 0) |
- (test_bit(IFX_SPI_DSR, &ifx_dev->signal_state) ? TIOCM_DSR : 0) |
- (test_bit(IFX_SPI_DCD, &ifx_dev->signal_state) ? TIOCM_CAR : 0) |
- (test_bit(IFX_SPI_RI, &ifx_dev->signal_state) ? TIOCM_RNG : 0);
- return value;
-}
-
-/**
- * ifx_spi_tiocmset - set modem bits
- * @tty: the tty structure
- * @set: bits to set
- * @clear: bits to clear
- *
- * The IFX6x60 only supports DTR and RTS. Set them accordingly
- * and flag that an update to the modem is needed.
- *
- * FIXME: do we need to kick the tranfers when we do this ?
- */
-static int ifx_spi_tiocmset(struct tty_struct *tty,
- unsigned int set, unsigned int clear)
-{
- struct ifx_spi_device *ifx_dev = tty->driver_data;
-
- if (set & TIOCM_RTS)
- set_bit(IFX_SPI_RTS, &ifx_dev->signal_state);
- if (set & TIOCM_DTR)
- set_bit(IFX_SPI_DTR, &ifx_dev->signal_state);
- if (clear & TIOCM_RTS)
- clear_bit(IFX_SPI_RTS, &ifx_dev->signal_state);
- if (clear & TIOCM_DTR)
- clear_bit(IFX_SPI_DTR, &ifx_dev->signal_state);
-
- set_bit(IFX_SPI_UPDATE, &ifx_dev->signal_state);
- return 0;
-}
-
-/**
- * ifx_spi_open - called on tty open
- * @tty: our tty device
- * @filp: file handle being associated with the tty
- *
- * Open the tty interface. We let the tty_port layer do all the work
- * for us.
- *
- * FIXME: Remove single device assumption and saved_ifx_dev
- */
-static int ifx_spi_open(struct tty_struct *tty, struct file *filp)
-{
- return tty_port_open(&saved_ifx_dev->tty_port, tty, filp);
-}
-
-/**
- * ifx_spi_close - called when our tty closes
- * @tty: the tty being closed
- * @filp: the file handle being closed
- *
- * Perform the close of the tty. We use the tty_port layer to do all
- * our hard work.
- */
-static void ifx_spi_close(struct tty_struct *tty, struct file *filp)
-{
- struct ifx_spi_device *ifx_dev = tty->driver_data;
- tty_port_close(&ifx_dev->tty_port, tty, filp);
- /* FIXME: should we do an ifx_spi_reset here ? */
-}
-
-/**
- * ifx_decode_spi_header - decode received header
- * @buffer: the received data
- * @length: decoded length
- * @more: decoded more flag
- * @received_cts: status of cts we received
- *
- * Note how received_cts is handled -- if header is all F it is left
- * the same as it was, if header is all 0 it is set to 0 otherwise it is
- * taken from the incoming header.
- *
- * FIXME: endianness
- */
-static int ifx_spi_decode_spi_header(unsigned char *buffer, int *length,
- unsigned char *more, unsigned char *received_cts)
-{
- u16 h1;
- u16 h2;
- u16 *in_buffer = (u16 *)buffer;
-
- h1 = *in_buffer;
- h2 = *(in_buffer+1);
-
- if (h1 == 0 && h2 == 0) {
- *received_cts = 0;
- *more = 0;
- return IFX_SPI_HEADER_0;
- } else if (h1 == 0xffff && h2 == 0xffff) {
- *more = 0;
- /* spi_slave_cts remains as it was */
- return IFX_SPI_HEADER_F;
- }
-
- *length = h1 & 0xfff; /* upper bits of byte are flags */
- *more = (buffer[1] >> IFX_SPI_MORE_BIT) & 1;
- *received_cts = (buffer[3] >> IFX_SPI_CTS_BIT) & 1;
- return 0;
-}
-
-/**
- * ifx_setup_spi_header - set header fields
- * @txbuffer: pointer to start of SPI buffer
- * @tx_count: bytes
- * @more: indicate if more to follow
- *
- * Format up an SPI header for a transfer
- *
- * FIXME: endianness?
- */
-static void ifx_spi_setup_spi_header(unsigned char *txbuffer, int tx_count,
- unsigned char more)
-{
- *(u16 *)(txbuffer) = tx_count;
- *(u16 *)(txbuffer+2) = IFX_SPI_PAYLOAD_SIZE;
- txbuffer[1] |= (more << IFX_SPI_MORE_BIT) & IFX_SPI_MORE_MASK;
-}
-
-/**
- * ifx_spi_prepare_tx_buffer - prepare transmit frame
- * @ifx_dev: our SPI device
- *
- * The transmit buffr needs a header and various other bits of
- * information followed by as much data as we can pull from the FIFO
- * and transfer. This function formats up a suitable buffer in the
- * ifx_dev->tx_buffer
- *
- * FIXME: performance - should we wake the tty when the queue is half
- * empty ?
- */
-static int ifx_spi_prepare_tx_buffer(struct ifx_spi_device *ifx_dev)
-{
- int temp_count;
- int queue_length;
- int tx_count;
- unsigned char *tx_buffer;
-
- tx_buffer = ifx_dev->tx_buffer;
-
- /* make room for required SPI header */
- tx_buffer += IFX_SPI_HEADER_OVERHEAD;
- tx_count = IFX_SPI_HEADER_OVERHEAD;
-
- /* clear to signal no more data if this turns out to be the
- * last buffer sent in a sequence */
- ifx_dev->spi_more = 0;
-
- /* if modem cts is set, just send empty buffer */
- if (!ifx_dev->spi_slave_cts) {
- /* see if there's tx data */
- queue_length = kfifo_len(&ifx_dev->tx_fifo);
- if (queue_length != 0) {
- /* data to mux -- see if there's room for it */
- temp_count = min(queue_length, IFX_SPI_PAYLOAD_SIZE);
- temp_count = kfifo_out_locked(&ifx_dev->tx_fifo,
- tx_buffer, temp_count,
- &ifx_dev->fifo_lock);
-
- /* update buffer pointer and data count in message */
- tx_buffer += temp_count;
- tx_count += temp_count;
- if (temp_count == queue_length)
- /* poke port to get more data */
- tty_port_tty_wakeup(&ifx_dev->tty_port);
- else /* more data in port, use next SPI message */
- ifx_dev->spi_more = 1;
- }
- }
- /* have data and info for header -- set up SPI header in buffer */
- /* spi header needs payload size, not entire buffer size */
- ifx_spi_setup_spi_header(ifx_dev->tx_buffer,
- tx_count-IFX_SPI_HEADER_OVERHEAD,
- ifx_dev->spi_more);
- /* swap actual data in the buffer */
- ifx_dev->swap_buf((ifx_dev->tx_buffer), tx_count,
- &ifx_dev->tx_buffer[IFX_SPI_TRANSFER_SIZE]);
- return tx_count;
-}
-
-/**
- * ifx_spi_write - line discipline write
- * @tty: our tty device
- * @buf: pointer to buffer to write (kernel space)
- * @count: size of buffer
- *
- * Write the characters we have been given into the FIFO. If the device
- * is not active then activate it, when the SRDY line is asserted back
- * this will commence I/O
- */
-static int ifx_spi_write(struct tty_struct *tty, const unsigned char *buf,
- int count)
-{
- struct ifx_spi_device *ifx_dev = tty->driver_data;
- unsigned char *tmp_buf = (unsigned char *)buf;
- unsigned long flags;
- bool is_fifo_empty;
- int tx_count;
-
- spin_lock_irqsave(&ifx_dev->fifo_lock, flags);
- is_fifo_empty = kfifo_is_empty(&ifx_dev->tx_fifo);
- tx_count = kfifo_in(&ifx_dev->tx_fifo, tmp_buf, count);
- spin_unlock_irqrestore(&ifx_dev->fifo_lock, flags);
- if (is_fifo_empty)
- mrdy_assert(ifx_dev);
-
- return tx_count;
-}
-
-/**
- * ifx_spi_chars_in_buffer - line discipline helper
- * @tty: our tty device
- *
- * Report how much data we can accept before we drop bytes. As we use
- * a simple FIFO this is nice and easy.
- */
-static int ifx_spi_write_room(struct tty_struct *tty)
-{
- struct ifx_spi_device *ifx_dev = tty->driver_data;
- return IFX_SPI_FIFO_SIZE - kfifo_len(&ifx_dev->tx_fifo);
-}
-
-/**
- * ifx_spi_chars_in_buffer - line discipline helper
- * @tty: our tty device
- *
- * Report how many characters we have buffered. In our case this is the
- * number of bytes sitting in our transmit FIFO.
- */
-static int ifx_spi_chars_in_buffer(struct tty_struct *tty)
-{
- struct ifx_spi_device *ifx_dev = tty->driver_data;
- return kfifo_len(&ifx_dev->tx_fifo);
-}
-
-/**
- * ifx_port_hangup
- * @tty: our tty
- *
- * tty port hang up. Called when tty_hangup processing is invoked either
- * by loss of carrier, or by software (eg vhangup). Serialized against
- * activate/shutdown by the tty layer.
- */
-static void ifx_spi_hangup(struct tty_struct *tty)
-{
- struct ifx_spi_device *ifx_dev = tty->driver_data;
- tty_port_hangup(&ifx_dev->tty_port);
-}
-
-/**
- * ifx_port_activate
- * @port: our tty port
- * @tty: our tty device
- *
- * tty port activate method - called for first open. Serialized
- * with hangup and shutdown by the tty layer.
- */
-static int ifx_port_activate(struct tty_port *port, struct tty_struct *tty)
-{
- struct ifx_spi_device *ifx_dev =
- container_of(port, struct ifx_spi_device, tty_port);
-
- /* clear any old data; can't do this in 'close' */
- kfifo_reset(&ifx_dev->tx_fifo);
-
- /* clear any flag which may be set in port shutdown procedure */
- clear_bit(IFX_SPI_STATE_IO_IN_PROGRESS, &ifx_dev->flags);
- clear_bit(IFX_SPI_STATE_IO_READY, &ifx_dev->flags);
-
- /* put port data into this tty */
- tty->driver_data = ifx_dev;
-
- /* allows flip string push from int context */
- port->low_latency = 1;
-
- /* set flag to allows data transfer */
- set_bit(IFX_SPI_STATE_IO_AVAILABLE, &ifx_dev->flags);
-
- return 0;
-}
-
-/**
- * ifx_port_shutdown
- * @port: our tty port
- *
- * tty port shutdown method - called for last port close. Serialized
- * with hangup and activate by the tty layer.
- */
-static void ifx_port_shutdown(struct tty_port *port)
-{
- struct ifx_spi_device *ifx_dev =
- container_of(port, struct ifx_spi_device, tty_port);
-
- clear_bit(IFX_SPI_STATE_IO_AVAILABLE, &ifx_dev->flags);
- mrdy_set_low(ifx_dev);
- del_timer(&ifx_dev->spi_timer);
- clear_bit(IFX_SPI_STATE_TIMER_PENDING, &ifx_dev->flags);
- tasklet_kill(&ifx_dev->io_work_tasklet);
-}
-
-static const struct tty_port_operations ifx_tty_port_ops = {
- .activate = ifx_port_activate,
- .shutdown = ifx_port_shutdown,
-};
-
-static const struct tty_operations ifx_spi_serial_ops = {
- .open = ifx_spi_open,
- .close = ifx_spi_close,
- .write = ifx_spi_write,
- .hangup = ifx_spi_hangup,
- .write_room = ifx_spi_write_room,
- .chars_in_buffer = ifx_spi_chars_in_buffer,
- .tiocmget = ifx_spi_tiocmget,
- .tiocmset = ifx_spi_tiocmset,
-};
-
-/**
- * ifx_spi_insert_fip_string - queue received data
- * @ifx_dev: our SPI device
- * @chars: buffer we have received
- * @size: number of chars reeived
- *
- * Queue bytes to the tty assuming the tty side is currently open. If
- * not the discard the data.
- */
-static void ifx_spi_insert_flip_string(struct ifx_spi_device *ifx_dev,
- unsigned char *chars, size_t size)
-{
- tty_insert_flip_string(&ifx_dev->tty_port, chars, size);
- tty_flip_buffer_push(&ifx_dev->tty_port);
-}
-
-/**
- * ifx_spi_complete - SPI transfer completed
- * @ctx: our SPI device
- *
- * An SPI transfer has completed. Process any received data and kick off
- * any further transmits we can commence.
- */
-static void ifx_spi_complete(void *ctx)
-{
- struct ifx_spi_device *ifx_dev = ctx;
- int length;
- int actual_length;
- unsigned char more = 0;
- unsigned char cts;
- int local_write_pending = 0;
- int queue_length;
- int srdy;
- int decode_result;
-
- mrdy_set_low(ifx_dev);
-
- if (!ifx_dev->spi_msg.status) {
- /* check header validity, get comm flags */
- ifx_dev->swap_buf(ifx_dev->rx_buffer, IFX_SPI_HEADER_OVERHEAD,
- &ifx_dev->rx_buffer[IFX_SPI_HEADER_OVERHEAD]);
- decode_result = ifx_spi_decode_spi_header(ifx_dev->rx_buffer,
- &length, &more, &cts);
- if (decode_result == IFX_SPI_HEADER_0) {
- dev_dbg(&ifx_dev->spi_dev->dev,
- "ignore input: invalid header 0");
- ifx_dev->spi_slave_cts = 0;
- goto complete_exit;
- } else if (decode_result == IFX_SPI_HEADER_F) {
- dev_dbg(&ifx_dev->spi_dev->dev,
- "ignore input: invalid header F");
- goto complete_exit;
- }
-
- ifx_dev->spi_slave_cts = cts;
-
- actual_length = min((unsigned int)length,
- ifx_dev->spi_msg.actual_length);
- ifx_dev->swap_buf(
- (ifx_dev->rx_buffer + IFX_SPI_HEADER_OVERHEAD),
- actual_length,
- &ifx_dev->rx_buffer[IFX_SPI_TRANSFER_SIZE]);
- ifx_spi_insert_flip_string(
- ifx_dev,
- ifx_dev->rx_buffer + IFX_SPI_HEADER_OVERHEAD,
- (size_t)actual_length);
- } else {
- more = 0;
- dev_dbg(&ifx_dev->spi_dev->dev, "SPI transfer error %d",
- ifx_dev->spi_msg.status);
- }
-
-complete_exit:
- if (ifx_dev->write_pending) {
- ifx_dev->write_pending = 0;
- local_write_pending = 1;
- }
-
- clear_bit(IFX_SPI_STATE_IO_IN_PROGRESS, &(ifx_dev->flags));
-
- queue_length = kfifo_len(&ifx_dev->tx_fifo);
- srdy = gpiod_get_value(ifx_dev->gpio.srdy);
- if (!srdy)
- ifx_spi_power_state_clear(ifx_dev, IFX_SPI_POWER_SRDY);
-
- /* schedule output if there is more to do */
- if (test_and_clear_bit(IFX_SPI_STATE_IO_READY, &ifx_dev->flags))
- tasklet_schedule(&ifx_dev->io_work_tasklet);
- else {
- if (more || ifx_dev->spi_more || queue_length > 0 ||
- local_write_pending) {
- if (ifx_dev->spi_slave_cts) {
- if (more)
- mrdy_assert(ifx_dev);
- } else
- mrdy_assert(ifx_dev);
- } else {
- /*
- * poke line discipline driver if any for more data
- * may or may not get more data to write
- * for now, say not busy
- */
- ifx_spi_power_state_clear(ifx_dev,
- IFX_SPI_POWER_DATA_PENDING);
- tty_port_tty_wakeup(&ifx_dev->tty_port);
- }
- }
-}
-
-/**
- * ifx_spio_io - I/O tasklet
- * @t: tasklet construct used to fetch the SPI device
- *
- * Queue data for transmission if possible and then kick off the
- * transfer.
- */
-static void ifx_spi_io(struct tasklet_struct *t)
-{
- int retval;
- struct ifx_spi_device *ifx_dev = from_tasklet(ifx_dev, t,
- io_work_tasklet);
-
- if (!test_and_set_bit(IFX_SPI_STATE_IO_IN_PROGRESS, &ifx_dev->flags) &&
- test_bit(IFX_SPI_STATE_IO_AVAILABLE, &ifx_dev->flags)) {
- if (ifx_dev->gpio.unack_srdy_int_nb > 0)
- ifx_dev->gpio.unack_srdy_int_nb--;
-
- ifx_spi_prepare_tx_buffer(ifx_dev);
-
- spi_message_init(&ifx_dev->spi_msg);
- INIT_LIST_HEAD(&ifx_dev->spi_msg.queue);
-
- ifx_dev->spi_msg.context = ifx_dev;
- ifx_dev->spi_msg.complete = ifx_spi_complete;
-
- /* set up our spi transfer */
- /* note len is BYTES, not transfers */
- ifx_dev->spi_xfer.len = IFX_SPI_TRANSFER_SIZE;
- ifx_dev->spi_xfer.cs_change = 0;
- ifx_dev->spi_xfer.speed_hz = ifx_dev->spi_dev->max_speed_hz;
- /* ifx_dev->spi_xfer.speed_hz = 390625; */
- ifx_dev->spi_xfer.bits_per_word =
- ifx_dev->spi_dev->bits_per_word;
-
- ifx_dev->spi_xfer.tx_buf = ifx_dev->tx_buffer;
- ifx_dev->spi_xfer.rx_buf = ifx_dev->rx_buffer;
-
- /*
- * setup dma pointers
- */
- if (ifx_dev->use_dma) {
- ifx_dev->spi_msg.is_dma_mapped = 1;
- ifx_dev->tx_dma = ifx_dev->tx_bus;
- ifx_dev->rx_dma = ifx_dev->rx_bus;
- ifx_dev->spi_xfer.tx_dma = ifx_dev->tx_dma;
- ifx_dev->spi_xfer.rx_dma = ifx_dev->rx_dma;
- } else {
- ifx_dev->spi_msg.is_dma_mapped = 0;
- ifx_dev->tx_dma = (dma_addr_t)0;
- ifx_dev->rx_dma = (dma_addr_t)0;
- ifx_dev->spi_xfer.tx_dma = (dma_addr_t)0;
- ifx_dev->spi_xfer.rx_dma = (dma_addr_t)0;
- }
-
- spi_message_add_tail(&ifx_dev->spi_xfer, &ifx_dev->spi_msg);
-
- /* Assert MRDY. This may have already been done by the write
- * routine.
- */
- mrdy_assert(ifx_dev);
-
- retval = spi_async(ifx_dev->spi_dev, &ifx_dev->spi_msg);
- if (retval) {
- clear_bit(IFX_SPI_STATE_IO_IN_PROGRESS,
- &ifx_dev->flags);
- tasklet_schedule(&ifx_dev->io_work_tasklet);
- return;
- }
- } else
- ifx_dev->write_pending = 1;
-}
-
-/**
- * ifx_spi_free_port - free up the tty side
- * @ifx_dev: IFX device going away
- *
- * Unregister and free up a port when the device goes away
- */
-static void ifx_spi_free_port(struct ifx_spi_device *ifx_dev)
-{
- if (ifx_dev->tty_dev)
- tty_unregister_device(tty_drv, ifx_dev->minor);
- tty_port_destroy(&ifx_dev->tty_port);
- kfifo_free(&ifx_dev->tx_fifo);
-}
-
-/**
- * ifx_spi_create_port - create a new port
- * @ifx_dev: our spi device
- *
- * Allocate and initialise the tty port that goes with this interface
- * and add it to the tty layer so that it can be opened.
- */
-static int ifx_spi_create_port(struct ifx_spi_device *ifx_dev)
-{
- int ret = 0;
- struct tty_port *pport = &ifx_dev->tty_port;
-
- spin_lock_init(&ifx_dev->fifo_lock);
- lockdep_set_class_and_subclass(&ifx_dev->fifo_lock,
- &ifx_spi_key, 0);
-
- if (kfifo_alloc(&ifx_dev->tx_fifo, IFX_SPI_FIFO_SIZE, GFP_KERNEL)) {
- ret = -ENOMEM;
- goto error_ret;
- }
-
- tty_port_init(pport);
- pport->ops = &ifx_tty_port_ops;
- ifx_dev->minor = IFX_SPI_TTY_ID;
- ifx_dev->tty_dev = tty_port_register_device(pport, tty_drv,
- ifx_dev->minor, &ifx_dev->spi_dev->dev);
- if (IS_ERR(ifx_dev->tty_dev)) {
- dev_dbg(&ifx_dev->spi_dev->dev,
- "%s: registering tty device failed", __func__);
- ret = PTR_ERR(ifx_dev->tty_dev);
- goto error_port;
- }
- return 0;
-
-error_port:
- tty_port_destroy(pport);
-error_ret:
- ifx_spi_free_port(ifx_dev);
- return ret;
-}
-
-/**
- * ifx_spi_handle_srdy - handle SRDY
- * @ifx_dev: device asserting SRDY
- *
- * Check our device state and see what we need to kick off when SRDY
- * is asserted. This usually means killing the timer and firing off the
- * I/O processing.
- */
-static void ifx_spi_handle_srdy(struct ifx_spi_device *ifx_dev)
-{
- if (test_bit(IFX_SPI_STATE_TIMER_PENDING, &ifx_dev->flags)) {
- del_timer(&ifx_dev->spi_timer);
- clear_bit(IFX_SPI_STATE_TIMER_PENDING, &ifx_dev->flags);
- }
-
- ifx_spi_power_state_set(ifx_dev, IFX_SPI_POWER_SRDY);
-
- if (!test_bit(IFX_SPI_STATE_IO_IN_PROGRESS, &ifx_dev->flags))
- tasklet_schedule(&ifx_dev->io_work_tasklet);
- else
- set_bit(IFX_SPI_STATE_IO_READY, &ifx_dev->flags);
-}
-
-/**
- * ifx_spi_srdy_interrupt - SRDY asserted
- * @irq: our IRQ number
- * @dev: our ifx device
- *
- * The modem asserted SRDY. Handle the srdy event
- */
-static irqreturn_t ifx_spi_srdy_interrupt(int irq, void *dev)
-{
- struct ifx_spi_device *ifx_dev = dev;
- ifx_dev->gpio.unack_srdy_int_nb++;
- ifx_spi_handle_srdy(ifx_dev);
- return IRQ_HANDLED;
-}
-
-/**
- * ifx_spi_reset_interrupt - Modem has changed reset state
- * @irq: interrupt number
- * @dev: our device pointer
- *
- * The modem has either entered or left reset state. Check the GPIO
- * line to see which.
- *
- * FIXME: review locking on MR_INPROGRESS versus
- * parallel unsolicited reset/solicited reset
- */
-static irqreturn_t ifx_spi_reset_interrupt(int irq, void *dev)
-{
- struct ifx_spi_device *ifx_dev = dev;
- int val = gpiod_get_value(ifx_dev->gpio.reset_out);
- int solreset = test_bit(MR_START, &ifx_dev->mdm_reset_state);
-
- if (val == 0) {
- /* entered reset */
- set_bit(MR_INPROGRESS, &ifx_dev->mdm_reset_state);
- if (!solreset) {
- /* unsolicited reset */
- tty_port_tty_hangup(&ifx_dev->tty_port, false);
- }
- } else {
- /* exited reset */
- clear_bit(MR_INPROGRESS, &ifx_dev->mdm_reset_state);
- if (solreset) {
- set_bit(MR_COMPLETE, &ifx_dev->mdm_reset_state);
- wake_up(&ifx_dev->mdm_reset_wait);
- }
- }
- return IRQ_HANDLED;
-}
-
-/**
- * ifx_spi_free_device - free device
- * @ifx_dev: device to free
- *
- * Free the IFX device
- */
-static void ifx_spi_free_device(struct ifx_spi_device *ifx_dev)
-{
- ifx_spi_free_port(ifx_dev);
- dma_free_coherent(&ifx_dev->spi_dev->dev,
- IFX_SPI_TRANSFER_SIZE,
- ifx_dev->tx_buffer,
- ifx_dev->tx_bus);
- dma_free_coherent(&ifx_dev->spi_dev->dev,
- IFX_SPI_TRANSFER_SIZE,
- ifx_dev->rx_buffer,
- ifx_dev->rx_bus);
-}
-
-/**
- * ifx_spi_reset - reset modem
- * @ifx_dev: modem to reset
- *
- * Perform a reset on the modem
- */
-static int ifx_spi_reset(struct ifx_spi_device *ifx_dev)
-{
- int ret;
- /*
- * set up modem power, reset
- *
- * delays are required on some platforms for the modem
- * to reset properly
- */
- set_bit(MR_START, &ifx_dev->mdm_reset_state);
- gpiod_set_value(ifx_dev->gpio.po, 0);
- gpiod_set_value(ifx_dev->gpio.reset, 0);
- msleep(25);
- gpiod_set_value(ifx_dev->gpio.reset, 1);
- msleep(1);
- gpiod_set_value(ifx_dev->gpio.po, 1);
- msleep(1);
- gpiod_set_value(ifx_dev->gpio.po, 0);
- ret = wait_event_timeout(ifx_dev->mdm_reset_wait,
- test_bit(MR_COMPLETE,
- &ifx_dev->mdm_reset_state),
- IFX_RESET_TIMEOUT);
- if (!ret)
- dev_warn(&ifx_dev->spi_dev->dev, "Modem reset timeout: (state:%lx)",
- ifx_dev->mdm_reset_state);
-
- ifx_dev->mdm_reset_state = 0;
- return ret;
-}
-
-/**
- * ifx_spi_spi_probe - probe callback
- * @spi: our possible matching SPI device
- *
- * Probe for a 6x60 modem on SPI bus. Perform any needed device and
- * GPIO setup.
- *
- * FIXME:
- * - Support for multiple devices
- * - Split out MID specific GPIO handling eventually
- */
-
-static int ifx_spi_spi_probe(struct spi_device *spi)
-{
- int ret;
- int srdy;
- struct ifx_modem_platform_data *pl_data;
- struct ifx_spi_device *ifx_dev;
- struct device *dev = &spi->dev;
-
- if (saved_ifx_dev) {
- dev_dbg(dev, "ignoring subsequent detection");
- return -ENODEV;
- }
-
- pl_data = dev_get_platdata(dev);
- if (!pl_data) {
- dev_err(dev, "missing platform data!");
- return -ENODEV;
- }
-
- /* initialize structure to hold our device variables */
- ifx_dev = kzalloc(sizeof(struct ifx_spi_device), GFP_KERNEL);
- if (!ifx_dev) {
- dev_err(dev, "spi device allocation failed");
- return -ENOMEM;
- }
- saved_ifx_dev = ifx_dev;
- ifx_dev->spi_dev = spi;
- clear_bit(IFX_SPI_STATE_IO_IN_PROGRESS, &ifx_dev->flags);
- spin_lock_init(&ifx_dev->write_lock);
- spin_lock_init(&ifx_dev->power_lock);
- ifx_dev->power_status = 0;
- timer_setup(&ifx_dev->spi_timer, ifx_spi_timeout, 0);
- ifx_dev->modem = pl_data->modem_type;
- ifx_dev->use_dma = pl_data->use_dma;
- ifx_dev->max_hz = pl_data->max_hz;
- /* initialize spi mode, etc */
- spi->max_speed_hz = ifx_dev->max_hz;
- spi->mode = IFX_SPI_MODE | (SPI_LOOP & spi->mode);
- spi->bits_per_word = spi_bpw;
- ret = spi_setup(spi);
- if (ret) {
- dev_err(dev, "SPI setup wasn't successful %d", ret);
- kfree(ifx_dev);
- return -ENODEV;
- }
-
- /* init swap_buf function according to word width configuration */
- if (spi->bits_per_word == 32)
- ifx_dev->swap_buf = swap_buf_32;
- else if (spi->bits_per_word == 16)
- ifx_dev->swap_buf = swap_buf_16;
- else
- ifx_dev->swap_buf = swap_buf_8;
-
- /* ensure SPI protocol flags are initialized to enable transfer */
- ifx_dev->spi_more = 0;
- ifx_dev->spi_slave_cts = 0;
-
- /*initialize transfer and dma buffers */
- ifx_dev->tx_buffer = dma_alloc_coherent(ifx_dev->spi_dev->dev.parent,
- IFX_SPI_TRANSFER_SIZE,
- &ifx_dev->tx_bus,
- GFP_KERNEL);
- if (!ifx_dev->tx_buffer) {
- dev_err(dev, "DMA-TX buffer allocation failed");
- ret = -ENOMEM;
- goto error_ret;
- }
- ifx_dev->rx_buffer = dma_alloc_coherent(ifx_dev->spi_dev->dev.parent,
- IFX_SPI_TRANSFER_SIZE,
- &ifx_dev->rx_bus,
- GFP_KERNEL);
- if (!ifx_dev->rx_buffer) {
- dev_err(dev, "DMA-RX buffer allocation failed");
- ret = -ENOMEM;
- goto error_ret;
- }
-
- /* initialize waitq for modem reset */
- init_waitqueue_head(&ifx_dev->mdm_reset_wait);
-
- spi_set_drvdata(spi, ifx_dev);
- tasklet_setup(&ifx_dev->io_work_tasklet, ifx_spi_io);
-
- set_bit(IFX_SPI_STATE_PRESENT, &ifx_dev->flags);
-
- /* create our tty port */
- ret = ifx_spi_create_port(ifx_dev);
- if (ret != 0) {
- dev_err(dev, "create default tty port failed");
- goto error_ret;
- }
-
- ifx_dev->gpio.reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
- if (IS_ERR(ifx_dev->gpio.reset)) {
- dev_err(dev, "could not obtain reset GPIO\n");
- ret = PTR_ERR(ifx_dev->gpio.reset);
- goto error_ret;
- }
- gpiod_set_consumer_name(ifx_dev->gpio.reset, "ifxModem reset");
- ifx_dev->gpio.po = devm_gpiod_get(dev, "power", GPIOD_OUT_LOW);
- if (IS_ERR(ifx_dev->gpio.po)) {
- dev_err(dev, "could not obtain power GPIO\n");
- ret = PTR_ERR(ifx_dev->gpio.po);
- goto error_ret;
- }
- gpiod_set_consumer_name(ifx_dev->gpio.po, "ifxModem power");
- ifx_dev->gpio.mrdy = devm_gpiod_get(dev, "mrdy", GPIOD_OUT_LOW);
- if (IS_ERR(ifx_dev->gpio.mrdy)) {
- dev_err(dev, "could not obtain mrdy GPIO\n");
- ret = PTR_ERR(ifx_dev->gpio.mrdy);
- goto error_ret;
- }
- gpiod_set_consumer_name(ifx_dev->gpio.mrdy, "ifxModem mrdy");
- ifx_dev->gpio.srdy = devm_gpiod_get(dev, "srdy", GPIOD_IN);
- if (IS_ERR(ifx_dev->gpio.srdy)) {
- dev_err(dev, "could not obtain srdy GPIO\n");
- ret = PTR_ERR(ifx_dev->gpio.srdy);
- goto error_ret;
- }
- gpiod_set_consumer_name(ifx_dev->gpio.srdy, "ifxModem srdy");
- ifx_dev->gpio.reset_out = devm_gpiod_get(dev, "rst_out", GPIOD_IN);
- if (IS_ERR(ifx_dev->gpio.reset_out)) {
- dev_err(dev, "could not obtain rst_out GPIO\n");
- ret = PTR_ERR(ifx_dev->gpio.reset_out);
- goto error_ret;
- }
- gpiod_set_consumer_name(ifx_dev->gpio.reset_out, "ifxModem reset out");
- ifx_dev->gpio.pmu_reset = devm_gpiod_get(dev, "pmu_reset", GPIOD_ASIS);
- if (IS_ERR(ifx_dev->gpio.pmu_reset)) {
- dev_err(dev, "could not obtain pmu_reset GPIO\n");
- ret = PTR_ERR(ifx_dev->gpio.pmu_reset);
- goto error_ret;
- }
- gpiod_set_consumer_name(ifx_dev->gpio.pmu_reset, "ifxModem PMU reset");
-
- ret = request_irq(gpiod_to_irq(ifx_dev->gpio.reset_out),
- ifx_spi_reset_interrupt,
- IRQF_TRIGGER_RISING|IRQF_TRIGGER_FALLING, DRVNAME,
- ifx_dev);
- if (ret) {
- dev_err(dev, "Unable to get irq %x\n",
- gpiod_to_irq(ifx_dev->gpio.reset_out));
- goto error_ret;
- }
-
- ret = ifx_spi_reset(ifx_dev);
-
- ret = request_irq(gpiod_to_irq(ifx_dev->gpio.srdy),
- ifx_spi_srdy_interrupt, IRQF_TRIGGER_RISING, DRVNAME,
- ifx_dev);
- if (ret) {
- dev_err(dev, "Unable to get irq %x",
- gpiod_to_irq(ifx_dev->gpio.srdy));
- goto error_ret2;
- }
-
- /* set pm runtime power state and register with power system */
- pm_runtime_set_active(dev);
- pm_runtime_enable(dev);
-
- /* handle case that modem is already signaling SRDY */
- /* no outgoing tty open at this point, this just satisfies the
- * modem's read and should reset communication properly
- */
- srdy = gpiod_get_value(ifx_dev->gpio.srdy);
-
- if (srdy) {
- mrdy_assert(ifx_dev);
- ifx_spi_handle_srdy(ifx_dev);
- } else
- mrdy_set_low(ifx_dev);
- return 0;
-
-error_ret2:
- free_irq(gpiod_to_irq(ifx_dev->gpio.reset_out), ifx_dev);
-error_ret:
- ifx_spi_free_device(ifx_dev);
- saved_ifx_dev = NULL;
- return ret;
-}
-
-/**
- * ifx_spi_spi_remove - SPI device was removed
- * @spi: SPI device
- *
- * FIXME: We should be shutting the device down here not in
- * the module unload path.
- */
-
-static int ifx_spi_spi_remove(struct spi_device *spi)
-{
- struct ifx_spi_device *ifx_dev = spi_get_drvdata(spi);
- /* stop activity */
- tasklet_kill(&ifx_dev->io_work_tasklet);
-
- pm_runtime_disable(&spi->dev);
-
- /* free irq */
- free_irq(gpiod_to_irq(ifx_dev->gpio.reset_out), ifx_dev);
- free_irq(gpiod_to_irq(ifx_dev->gpio.srdy), ifx_dev);
-
- /* free allocations */
- ifx_spi_free_device(ifx_dev);
-
- saved_ifx_dev = NULL;
- return 0;
-}
-
-/**
- * ifx_spi_spi_shutdown - called on SPI shutdown
- * @spi: SPI device
- *
- * No action needs to be taken here
- */
-
-static void ifx_spi_spi_shutdown(struct spi_device *spi)
-{
- struct ifx_spi_device *ifx_dev = spi_get_drvdata(spi);
-
- ifx_modem_power_off(ifx_dev);
-}
-
-/*
- * various suspends and resumes have nothing to do
- * no hardware to save state for
- */
-
-/**
- * ifx_spi_pm_suspend - suspend modem on system suspend
- * @dev: device being suspended
- *
- * Suspend the modem. No action needed on Intel MID platforms, may
- * need extending for other systems.
- */
-static int ifx_spi_pm_suspend(struct device *dev)
-{
- return 0;
-}
-
-/**
- * ifx_spi_pm_resume - resume modem on system resume
- * @dev: device being suspended
- *
- * Allow the modem to resume. No action needed.
- *
- * FIXME: do we need to reset anything here ?
- */
-static int ifx_spi_pm_resume(struct device *dev)
-{
- return 0;
-}
-
-/**
- * ifx_spi_pm_runtime_resume - suspend modem
- * @dev: device being suspended
- *
- * Allow the modem to resume. No action needed.
- */
-static int ifx_spi_pm_runtime_resume(struct device *dev)
-{
- return 0;
-}
-
-/**
- * ifx_spi_pm_runtime_suspend - suspend modem
- * @dev: device being suspended
- *
- * Allow the modem to suspend and thus suspend to continue up the
- * device tree.
- */
-static int ifx_spi_pm_runtime_suspend(struct device *dev)
-{
- return 0;
-}
-
-/**
- * ifx_spi_pm_runtime_idle - check if modem idle
- * @dev: our device
- *
- * Check conditions and queue runtime suspend if idle.
- */
-static int ifx_spi_pm_runtime_idle(struct device *dev)
-{
- struct spi_device *spi = to_spi_device(dev);
- struct ifx_spi_device *ifx_dev = spi_get_drvdata(spi);
-
- if (!ifx_dev->power_status)
- pm_runtime_suspend(dev);
-
- return 0;
-}
-
-static const struct dev_pm_ops ifx_spi_pm = {
- .resume = ifx_spi_pm_resume,
- .suspend = ifx_spi_pm_suspend,
- .runtime_resume = ifx_spi_pm_runtime_resume,
- .runtime_suspend = ifx_spi_pm_runtime_suspend,
- .runtime_idle = ifx_spi_pm_runtime_idle
-};
-
-static const struct spi_device_id ifx_id_table[] = {
- {"ifx6160", 0},
- {"ifx6260", 0},
- { }
-};
-MODULE_DEVICE_TABLE(spi, ifx_id_table);
-
-/* spi operations */
-static struct spi_driver ifx_spi_driver = {
- .driver = {
- .name = DRVNAME,
- .pm = &ifx_spi_pm,
- },
- .probe = ifx_spi_spi_probe,
- .shutdown = ifx_spi_spi_shutdown,
- .remove = ifx_spi_spi_remove,
- .id_table = ifx_id_table
-};
-
-/**
- * ifx_spi_exit - module exit
- *
- * Unload the module.
- */
-
-static void __exit ifx_spi_exit(void)
-{
- /* unregister */
- spi_unregister_driver(&ifx_spi_driver);
- tty_unregister_driver(tty_drv);
- put_tty_driver(tty_drv);
- unregister_reboot_notifier(&ifx_modem_reboot_notifier_block);
-}
-
-/**
- * ifx_spi_init - module entry point
- *
- * Initialise the SPI and tty interfaces for the IFX SPI driver
- * We need to initialize upper-edge spi driver after the tty
- * driver because otherwise the spi probe will race
- */
-
-static int __init ifx_spi_init(void)
-{
- int result;
-
- tty_drv = alloc_tty_driver(1);
- if (!tty_drv) {
- pr_err("%s: alloc_tty_driver failed", DRVNAME);
- return -ENOMEM;
- }
-
- tty_drv->driver_name = DRVNAME;
- tty_drv->name = TTYNAME;
- tty_drv->minor_start = IFX_SPI_TTY_ID;
- tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
- tty_drv->subtype = SERIAL_TYPE_NORMAL;
- tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
- tty_drv->init_termios = tty_std_termios;
-
- tty_set_operations(tty_drv, &ifx_spi_serial_ops);
-
- result = tty_register_driver(tty_drv);
- if (result) {
- pr_err("%s: tty_register_driver failed(%d)",
- DRVNAME, result);
- goto err_free_tty;
- }
-
- result = spi_register_driver(&ifx_spi_driver);
- if (result) {
- pr_err("%s: spi_register_driver failed(%d)",
- DRVNAME, result);
- goto err_unreg_tty;
- }
-
- result = register_reboot_notifier(&ifx_modem_reboot_notifier_block);
- if (result) {
- pr_err("%s: register ifx modem reboot notifier failed(%d)",
- DRVNAME, result);
- goto err_unreg_spi;
- }
-
- return 0;
-err_unreg_spi:
- spi_unregister_driver(&ifx_spi_driver);
-err_unreg_tty:
- tty_unregister_driver(tty_drv);
-err_free_tty:
- put_tty_driver(tty_drv);
-
- return result;
-}
-
-module_init(ifx_spi_init);
-module_exit(ifx_spi_exit);
-
-MODULE_AUTHOR("Intel");
-MODULE_DESCRIPTION("IFX6x60 spi driver");
-MODULE_LICENSE("GPL");
-MODULE_INFO(Version, "0.1-IFX6x60");
diff --git a/drivers/tty/serial/ifx6x60.h b/drivers/tty/serial/ifx6x60.h
deleted file mode 100644
index ecb841d928a7..000000000000
--- a/drivers/tty/serial/ifx6x60.h
+++ /dev/null
@@ -1,118 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/****************************************************************************
- *
- * Driver for the IFX spi modem.
- *
- * Copyright (C) 2009, 2010 Intel Corp
- * Jim Stanley <jim.stanley@intel.com>
- *
- *****************************************************************************/
-#ifndef _IFX6X60_H
-#define _IFX6X60_H
-
-struct gpio_desc;
-
-#define DRVNAME "ifx6x60"
-#define TTYNAME "ttyIFX"
-
-#define IFX_SPI_MAX_MINORS 1
-#define IFX_SPI_TRANSFER_SIZE 2048
-#define IFX_SPI_FIFO_SIZE 4096
-
-#define IFX_SPI_HEADER_OVERHEAD 4
-#define IFX_RESET_TIMEOUT msecs_to_jiffies(50)
-
-/* device flags bitfield definitions */
-#define IFX_SPI_STATE_PRESENT 0
-#define IFX_SPI_STATE_IO_IN_PROGRESS 1
-#define IFX_SPI_STATE_IO_READY 2
-#define IFX_SPI_STATE_TIMER_PENDING 3
-#define IFX_SPI_STATE_IO_AVAILABLE 4
-
-/* flow control bitfields */
-#define IFX_SPI_DCD 0
-#define IFX_SPI_CTS 1
-#define IFX_SPI_DSR 2
-#define IFX_SPI_RI 3
-#define IFX_SPI_DTR 4
-#define IFX_SPI_RTS 5
-#define IFX_SPI_TX_FC 6
-#define IFX_SPI_RX_FC 7
-#define IFX_SPI_UPDATE 8
-
-#define IFX_SPI_PAYLOAD_SIZE (IFX_SPI_TRANSFER_SIZE - \
- IFX_SPI_HEADER_OVERHEAD)
-
-#define IFX_SPI_IRQ_TYPE DETECT_EDGE_RISING
-#define IFX_SPI_GPIO_TARGET 0
-#define IFX_SPI_GPIO0 0x105
-
-#define IFX_SPI_STATUS_TIMEOUT (2000*HZ)
-
-/* values for bits in power status byte */
-#define IFX_SPI_POWER_DATA_PENDING 1
-#define IFX_SPI_POWER_SRDY 2
-
-struct ifx_spi_device {
- /* Our SPI device */
- struct spi_device *spi_dev;
-
- /* Port specific data */
- struct kfifo tx_fifo;
- spinlock_t fifo_lock;
- unsigned long signal_state;
-
- /* TTY Layer logic */
- struct tty_port tty_port;
- struct device *tty_dev;
- int minor;
-
- /* Low level I/O work */
- struct tasklet_struct io_work_tasklet;
- unsigned long flags;
- dma_addr_t rx_dma;
- dma_addr_t tx_dma;
-
- int modem; /* Modem type */
- int use_dma; /* provide dma-able addrs in SPI msg */
- long max_hz; /* max SPI frequency */
-
- spinlock_t write_lock;
- int write_pending;
- spinlock_t power_lock;
- unsigned char power_status;
-
- unsigned char *rx_buffer;
- unsigned char *tx_buffer;
- dma_addr_t rx_bus;
- dma_addr_t tx_bus;
- unsigned char spi_more;
- unsigned char spi_slave_cts;
-
- struct timer_list spi_timer;
-
- struct spi_message spi_msg;
- struct spi_transfer spi_xfer;
-
- struct {
- /* gpio lines */
- struct gpio_desc *srdy; /* slave-ready gpio */
- struct gpio_desc *mrdy; /* master-ready gpio */
- struct gpio_desc *reset; /* modem-reset gpio */
- struct gpio_desc *po; /* modem-on gpio */
- struct gpio_desc *reset_out; /* modem-in-reset gpio */
- struct gpio_desc *pmu_reset; /* PMU reset gpio */
- /* state/stats */
- int unack_srdy_int_nb;
- } gpio;
-
- /* modem reset */
- unsigned long mdm_reset_state;
-#define MR_START 0
-#define MR_INPROGRESS 1
-#define MR_COMPLETE 2
- wait_queue_head_t mdm_reset_wait;
- void (*swap_buf)(unsigned char *buf, int len, void *end);
-};
-
-#endif /* _IFX6X60_H */
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 425624d794dd..8257597d034d 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -2248,7 +2248,7 @@ static int imx_uart_probe(struct platform_device *pdev)
sport->port.dev = &pdev->dev;
sport->port.mapbase = res->start;
sport->port.membase = base;
- sport->port.type = PORT_IMX,
+ sport->port.type = PORT_IMX;
sport->port.iotype = UPIO_MEM;
sport->port.irq = rxirq;
sport->port.fifosize = 32;
diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c
index 62813e421f12..497b334bc845 100644
--- a/drivers/tty/serial/lantiq.c
+++ b/drivers/tty/serial/lantiq.c
@@ -876,7 +876,7 @@ static int lqasc_probe(struct platform_device *pdev)
port->flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP;
port->ops = &lqasc_pops;
port->fifosize = 16;
- port->type = PORT_LTQ_ASC,
+ port->type = PORT_LTQ_ASC;
port->line = line;
port->dev = &pdev->dev;
/* unused, just to be backward-compatible */
diff --git a/drivers/tty/serial/max3100.c b/drivers/tty/serial/max3100.c
index 371569a0fd00..3c92d4e01488 100644
--- a/drivers/tty/serial/max3100.c
+++ b/drivers/tty/serial/max3100.c
@@ -521,9 +521,6 @@ max3100_set_termios(struct uart_port *port, struct ktermios *termios,
MAX3100_STATUS_PE | MAX3100_STATUS_FE |
MAX3100_STATUS_OE;
- /* we are sending char from a workqueue so enable */
- s->port.state->port.low_latency = 1;
-
if (s->poll_time > 0)
del_timer_sync(&s->timer);
diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index 8ecf622602cb..f414d6acad69 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -34,8 +34,6 @@
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
-#include <asm/cacheflush.h>
-
#include <linux/gpio/consumer.h>
#include <linux/err.h>
#include <linux/irq.h>
@@ -1535,34 +1533,6 @@ disable_clk_ahb:
return err;
}
-/*
- * This function returns 1 if pdev isn't a device instatiated by dt, 0 if it
- * could successfully get all information from dt or a negative errno.
- */
-static int serial_mxs_probe_dt(struct mxs_auart_port *s,
- struct platform_device *pdev)
-{
- struct device_node *np = pdev->dev.of_node;
- int ret;
-
- if (!np)
- /* no device tree device */
- return 1;
-
- ret = of_alias_get_id(np, "serial");
- if (ret < 0) {
- dev_err(&pdev->dev, "failed to get alias id: %d\n", ret);
- return ret;
- }
- s->port.line = ret;
-
- if (of_get_property(np, "uart-has-rtscts", NULL) ||
- of_get_property(np, "fsl,uart-has-rtscts", NULL) /* deprecated */)
- set_bit(MXS_AUART_RTSCTS, &s->flags);
-
- return 0;
-}
-
static int mxs_auart_init_gpios(struct mxs_auart_port *s, struct device *dev)
{
enum mctrl_gpio_idx i;
@@ -1631,6 +1601,7 @@ static int mxs_auart_request_gpio_irq(struct mxs_auart_port *s)
static int mxs_auart_probe(struct platform_device *pdev)
{
+ struct device_node *np = pdev->dev.of_node;
struct mxs_auart_port *s;
u32 version;
int ret, irq;
@@ -1643,11 +1614,17 @@ static int mxs_auart_probe(struct platform_device *pdev)
s->port.dev = &pdev->dev;
s->dev = &pdev->dev;
- ret = serial_mxs_probe_dt(s, pdev);
- if (ret > 0)
- s->port.line = pdev->id < 0 ? 0 : pdev->id;
- else if (ret < 0)
+ ret = of_alias_get_id(np, "serial");
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to get alias id: %d\n", ret);
return ret;
+ }
+ s->port.line = ret;
+
+ if (of_get_property(np, "uart-has-rtscts", NULL) ||
+ of_get_property(np, "fsl,uart-has-rtscts", NULL) /* deprecated */)
+ set_bit(MXS_AUART_RTSCTS, &s->flags);
+
if (s->port.line >= ARRAY_SIZE(auart_port)) {
dev_err(&pdev->dev, "serial%d out of range\n", s->port.line);
return -EINVAL;
diff --git a/drivers/tty/serial/owl-uart.c b/drivers/tty/serial/owl-uart.c
index c149f8c30007..abc6042f0378 100644
--- a/drivers/tty/serial/owl-uart.c
+++ b/drivers/tty/serial/owl-uart.c
@@ -12,6 +12,7 @@
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/io.h>
+#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
@@ -62,6 +63,9 @@
#define OWL_UART_STAT_TRFL_MASK GENMASK(16, 11)
#define OWL_UART_STAT_UTBB BIT(17)
+#define OWL_UART_POLL_USEC 5
+#define OWL_UART_TIMEOUT_USEC 10000
+
static struct uart_driver owl_uart_driver;
struct owl_uart_info {
@@ -461,6 +465,36 @@ static void owl_uart_config_port(struct uart_port *port, int flags)
}
}
+#ifdef CONFIG_CONSOLE_POLL
+
+static int owl_uart_poll_get_char(struct uart_port *port)
+{
+ if (owl_uart_read(port, OWL_UART_STAT) & OWL_UART_STAT_RFEM)
+ return NO_POLL_CHAR;
+
+ return owl_uart_read(port, OWL_UART_RXDAT);
+}
+
+static void owl_uart_poll_put_char(struct uart_port *port, unsigned char ch)
+{
+ u32 reg;
+ int ret;
+
+ /* Wait while FIFO is full or timeout */
+ ret = readl_poll_timeout_atomic(port->membase + OWL_UART_STAT, reg,
+ !(reg & OWL_UART_STAT_TFFU),
+ OWL_UART_POLL_USEC,
+ OWL_UART_TIMEOUT_USEC);
+ if (ret == -ETIMEDOUT) {
+ dev_err(port->dev, "Timeout waiting while UART TX FULL\n");
+ return;
+ }
+
+ owl_uart_write(port, ch, OWL_UART_TXDAT);
+}
+
+#endif /* CONFIG_CONSOLE_POLL */
+
static const struct uart_ops owl_uart_ops = {
.set_mctrl = owl_uart_set_mctrl,
.get_mctrl = owl_uart_get_mctrl,
@@ -476,6 +510,10 @@ static const struct uart_ops owl_uart_ops = {
.request_port = owl_uart_request_port,
.release_port = owl_uart_release_port,
.verify_port = owl_uart_verify_port,
+#ifdef CONFIG_CONSOLE_POLL
+ .poll_get_char = owl_uart_poll_get_char,
+ .poll_put_char = owl_uart_poll_put_char,
+#endif
};
#ifdef CONFIG_SERIAL_OWL_CONSOLE
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 828f9ad1be49..ba31e97d3d96 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -975,7 +975,6 @@ static int uart_set_info(struct tty_struct *tty, struct tty_port *port,
port->closing_wait = closing_wait;
if (new_info->xmit_fifo_size)
uport->fifosize = new_info->xmit_fifo_size;
- port->low_latency = (uport->flags & UPF_LOW_LATENCY) ? 1 : 0;
check_and_exit:
retval = 0;
@@ -1795,8 +1794,6 @@ static int uart_port_activate(struct tty_port *port, struct tty_struct *tty)
if (!uport || uport->flags & UPF_DEAD)
return -ENXIO;
- port->low_latency = (uport->flags & UPF_LOW_LATENCY) ? 1 : 0;
-
/*
* Start up the serial port.
*/
@@ -2851,6 +2848,8 @@ static const struct attribute_group tty_dev_attr_group = {
* @drv: pointer to the uart low level driver structure for this port
* @uport: uart port structure to use for this port.
*
+ * Context: task context, might sleep
+ *
* This allows the driver to register its own uart_port structure
* with the core driver. The main purpose is to allow the low
* level uart drivers to expand uart_port, rather than having yet
@@ -2864,8 +2863,6 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)
struct device *tty_dev;
int num_groups;
- BUG_ON(in_interrupt());
-
if (uport->line >= drv->nr)
return -EINVAL;
@@ -2954,6 +2951,8 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)
* @drv: pointer to the uart low level driver structure for this port
* @uport: uart port structure for this port
*
+ * Context: task context, might sleep
+ *
* This unhooks (and hangs up) the specified port structure from the
* core driver. No further calls will be made to the low-level code
* for this port.
@@ -2966,8 +2965,6 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport)
struct tty_struct *tty;
int ret = 0;
- BUG_ON(in_interrupt());
-
mutex_lock(&port_mutex);
/*
diff --git a/drivers/tty/serial/sirfsoc_uart.c b/drivers/tty/serial/sirfsoc_uart.c
deleted file mode 100644
index 38622f2a30a9..000000000000
--- a/drivers/tty/serial/sirfsoc_uart.c
+++ /dev/null
@@ -1,1503 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Driver for CSR SiRFprimaII onboard UARTs.
- *
- * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
- */
-
-#include <linux/module.h>
-#include <linux/ioport.h>
-#include <linux/platform_device.h>
-#include <linux/init.h>
-#include <linux/sysrq.h>
-#include <linux/console.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial_core.h>
-#include <linux/serial.h>
-#include <linux/clk.h>
-#include <linux/of.h>
-#include <linux/slab.h>
-#include <linux/io.h>
-#include <linux/of_gpio.h>
-#include <linux/dmaengine.h>
-#include <linux/dma-direction.h>
-#include <linux/dma-mapping.h>
-#include <asm/irq.h>
-#include <asm/mach/irq.h>
-
-#include "sirfsoc_uart.h"
-
-static unsigned int
-sirfsoc_uart_pio_tx_chars(struct sirfsoc_uart_port *sirfport, int count);
-static unsigned int
-sirfsoc_uart_pio_rx_chars(struct uart_port *port, unsigned int max_rx_count);
-static struct uart_driver sirfsoc_uart_drv;
-
-static void sirfsoc_uart_tx_dma_complete_callback(void *param);
-static const struct sirfsoc_baudrate_to_regv baudrate_to_regv[] = {
- {4000000, 2359296},
- {3500000, 1310721},
- {3000000, 1572865},
- {2500000, 1245186},
- {2000000, 1572866},
- {1500000, 1245188},
- {1152000, 1638404},
- {1000000, 1572869},
- {921600, 1114120},
- {576000, 1245196},
- {500000, 1245198},
- {460800, 1572876},
- {230400, 1310750},
- {115200, 1310781},
- {57600, 1310843},
- {38400, 1114328},
- {19200, 1114545},
- {9600, 1114979},
-};
-
-static struct sirfsoc_uart_port *sirf_ports[SIRFSOC_UART_NR];
-
-static inline struct sirfsoc_uart_port *to_sirfport(struct uart_port *port)
-{
- return container_of(port, struct sirfsoc_uart_port, port);
-}
-
-static inline unsigned int sirfsoc_uart_tx_empty(struct uart_port *port)
-{
- unsigned long reg;
- struct sirfsoc_uart_port *sirfport = to_sirfport(port);
- struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
- struct sirfsoc_fifo_status *ufifo_st = &sirfport->uart_reg->fifo_status;
- reg = rd_regl(port, ureg->sirfsoc_tx_fifo_status);
- return (reg & ufifo_st->ff_empty(port)) ? TIOCSER_TEMT : 0;
-}
-
-static unsigned int sirfsoc_uart_get_mctrl(struct uart_port *port)
-{
- struct sirfsoc_uart_port *sirfport = to_sirfport(port);
- struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
- if (!sirfport->hw_flow_ctrl || !sirfport->ms_enabled)
- goto cts_asserted;
- if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) {
- if (!(rd_regl(port, ureg->sirfsoc_afc_ctrl) &
- SIRFUART_AFC_CTS_STATUS))
- goto cts_asserted;
- else
- goto cts_deasserted;
- } else {
- if (!gpio_get_value(sirfport->cts_gpio))
- goto cts_asserted;
- else
- goto cts_deasserted;
- }
-cts_deasserted:
- return TIOCM_CAR | TIOCM_DSR;
-cts_asserted:
- return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS;
-}
-
-static void sirfsoc_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
- struct sirfsoc_uart_port *sirfport = to_sirfport(port);
- struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
- unsigned int assert = mctrl & TIOCM_RTS;
- unsigned int val = assert ? SIRFUART_AFC_CTRL_RX_THD : 0x0;
- unsigned int current_val;
-
- if (mctrl & TIOCM_LOOP) {
- if (sirfport->uart_reg->uart_type == SIRF_REAL_UART)
- wr_regl(port, ureg->sirfsoc_line_ctrl,
- rd_regl(port, ureg->sirfsoc_line_ctrl) |
- SIRFUART_LOOP_BACK);
- else
- wr_regl(port, ureg->sirfsoc_mode1,
- rd_regl(port, ureg->sirfsoc_mode1) |
- SIRFSOC_USP_LOOP_BACK_CTRL);
- } else {
- if (sirfport->uart_reg->uart_type == SIRF_REAL_UART)
- wr_regl(port, ureg->sirfsoc_line_ctrl,
- rd_regl(port, ureg->sirfsoc_line_ctrl) &
- ~SIRFUART_LOOP_BACK);
- else
- wr_regl(port, ureg->sirfsoc_mode1,
- rd_regl(port, ureg->sirfsoc_mode1) &
- ~SIRFSOC_USP_LOOP_BACK_CTRL);
- }
-
- if (!sirfport->hw_flow_ctrl || !sirfport->ms_enabled)
- return;
- if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) {
- current_val = rd_regl(port, ureg->sirfsoc_afc_ctrl) & ~0xFF;
- val |= current_val;
- wr_regl(port, ureg->sirfsoc_afc_ctrl, val);
- } else {
- if (!val)
- gpio_set_value(sirfport->rts_gpio, 1);
- else
- gpio_set_value(sirfport->rts_gpio, 0);
- }
-}
-
-static void sirfsoc_uart_stop_tx(struct uart_port *port)
-{
- struct sirfsoc_uart_port *sirfport = to_sirfport(port);
- struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
- struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
-
- if (sirfport->tx_dma_chan) {
- if (sirfport->tx_dma_state == TX_DMA_RUNNING) {
- dmaengine_pause(sirfport->tx_dma_chan);
- sirfport->tx_dma_state = TX_DMA_PAUSE;
- } else {
- if (!sirfport->is_atlas7)
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- rd_regl(port, ureg->sirfsoc_int_en_reg) &
- ~uint_en->sirfsoc_txfifo_empty_en);
- else
- wr_regl(port, ureg->sirfsoc_int_en_clr_reg,
- uint_en->sirfsoc_txfifo_empty_en);
- }
- } else {
- if (sirfport->uart_reg->uart_type == SIRF_USP_UART)
- wr_regl(port, ureg->sirfsoc_tx_rx_en, rd_regl(port,
- ureg->sirfsoc_tx_rx_en) & ~SIRFUART_TX_EN);
- if (!sirfport->is_atlas7)
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- rd_regl(port, ureg->sirfsoc_int_en_reg) &
- ~uint_en->sirfsoc_txfifo_empty_en);
- else
- wr_regl(port, ureg->sirfsoc_int_en_clr_reg,
- uint_en->sirfsoc_txfifo_empty_en);
- }
-}
-
-static void sirfsoc_uart_tx_with_dma(struct sirfsoc_uart_port *sirfport)
-{
- struct uart_port *port = &sirfport->port;
- struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
- struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
- struct circ_buf *xmit = &port->state->xmit;
- unsigned long tran_size;
- unsigned long tran_start;
- unsigned long pio_tx_size;
-
- tran_size = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE);
- tran_start = (unsigned long)(xmit->buf + xmit->tail);
- if (uart_circ_empty(xmit) || uart_tx_stopped(port) ||
- !tran_size)
- return;
- if (sirfport->tx_dma_state == TX_DMA_PAUSE) {
- dmaengine_resume(sirfport->tx_dma_chan);
- return;
- }
- if (sirfport->tx_dma_state == TX_DMA_RUNNING)
- return;
- if (!sirfport->is_atlas7)
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- rd_regl(port, ureg->sirfsoc_int_en_reg)&
- ~(uint_en->sirfsoc_txfifo_empty_en));
- else
- wr_regl(port, ureg->sirfsoc_int_en_clr_reg,
- uint_en->sirfsoc_txfifo_empty_en);
- /*
- * DMA requires buffer address and buffer length are both aligned with
- * 4 bytes, so we use PIO for
- * 1. if address is not aligned with 4bytes, use PIO for the first 1~3
- * bytes, and move to DMA for the left part aligned with 4bytes
- * 2. if buffer length is not aligned with 4bytes, use DMA for aligned
- * part first, move to PIO for the left 1~3 bytes
- */
- if (tran_size < 4 || BYTES_TO_ALIGN(tran_start)) {
- wr_regl(port, ureg->sirfsoc_tx_fifo_op, SIRFUART_FIFO_STOP);
- wr_regl(port, ureg->sirfsoc_tx_dma_io_ctrl,
- rd_regl(port, ureg->sirfsoc_tx_dma_io_ctrl)|
- SIRFUART_IO_MODE);
- if (BYTES_TO_ALIGN(tran_start)) {
- pio_tx_size = sirfsoc_uart_pio_tx_chars(sirfport,
- BYTES_TO_ALIGN(tran_start));
- tran_size -= pio_tx_size;
- }
- if (tran_size < 4)
- sirfsoc_uart_pio_tx_chars(sirfport, tran_size);
- if (!sirfport->is_atlas7)
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- rd_regl(port, ureg->sirfsoc_int_en_reg)|
- uint_en->sirfsoc_txfifo_empty_en);
- else
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- uint_en->sirfsoc_txfifo_empty_en);
- wr_regl(port, ureg->sirfsoc_tx_fifo_op, SIRFUART_FIFO_START);
- } else {
- /* tx transfer mode switch into dma mode */
- wr_regl(port, ureg->sirfsoc_tx_fifo_op, SIRFUART_FIFO_STOP);
- wr_regl(port, ureg->sirfsoc_tx_dma_io_ctrl,
- rd_regl(port, ureg->sirfsoc_tx_dma_io_ctrl)&
- ~SIRFUART_IO_MODE);
- wr_regl(port, ureg->sirfsoc_tx_fifo_op, SIRFUART_FIFO_START);
- tran_size &= ~(0x3);
-
- sirfport->tx_dma_addr = dma_map_single(port->dev,
- xmit->buf + xmit->tail,
- tran_size, DMA_TO_DEVICE);
- sirfport->tx_dma_desc = dmaengine_prep_slave_single(
- sirfport->tx_dma_chan, sirfport->tx_dma_addr,
- tran_size, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT);
- if (!sirfport->tx_dma_desc) {
- dev_err(port->dev, "DMA prep slave single fail\n");
- return;
- }
- sirfport->tx_dma_desc->callback =
- sirfsoc_uart_tx_dma_complete_callback;
- sirfport->tx_dma_desc->callback_param = (void *)sirfport;
- sirfport->transfer_size = tran_size;
-
- dmaengine_submit(sirfport->tx_dma_desc);
- dma_async_issue_pending(sirfport->tx_dma_chan);
- sirfport->tx_dma_state = TX_DMA_RUNNING;
- }
-}
-
-static void sirfsoc_uart_start_tx(struct uart_port *port)
-{
- struct sirfsoc_uart_port *sirfport = to_sirfport(port);
- struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
- struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
- if (sirfport->tx_dma_chan)
- sirfsoc_uart_tx_with_dma(sirfport);
- else {
- if (sirfport->uart_reg->uart_type == SIRF_USP_UART)
- wr_regl(port, ureg->sirfsoc_tx_rx_en, rd_regl(port,
- ureg->sirfsoc_tx_rx_en) | SIRFUART_TX_EN);
- wr_regl(port, ureg->sirfsoc_tx_fifo_op, SIRFUART_FIFO_STOP);
- sirfsoc_uart_pio_tx_chars(sirfport, port->fifosize);
- wr_regl(port, ureg->sirfsoc_tx_fifo_op, SIRFUART_FIFO_START);
- if (!sirfport->is_atlas7)
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- rd_regl(port, ureg->sirfsoc_int_en_reg)|
- uint_en->sirfsoc_txfifo_empty_en);
- else
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- uint_en->sirfsoc_txfifo_empty_en);
- }
-}
-
-static void sirfsoc_uart_stop_rx(struct uart_port *port)
-{
- struct sirfsoc_uart_port *sirfport = to_sirfport(port);
- struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
- struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
-
- wr_regl(port, ureg->sirfsoc_rx_fifo_op, 0);
- if (sirfport->rx_dma_chan) {
- if (!sirfport->is_atlas7)
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- rd_regl(port, ureg->sirfsoc_int_en_reg) &
- ~(SIRFUART_RX_DMA_INT_EN(uint_en,
- sirfport->uart_reg->uart_type) |
- uint_en->sirfsoc_rx_done_en));
- else
- wr_regl(port, ureg->sirfsoc_int_en_clr_reg,
- SIRFUART_RX_DMA_INT_EN(uint_en,
- sirfport->uart_reg->uart_type)|
- uint_en->sirfsoc_rx_done_en);
- dmaengine_terminate_all(sirfport->rx_dma_chan);
- } else {
- if (!sirfport->is_atlas7)
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- rd_regl(port, ureg->sirfsoc_int_en_reg)&
- ~(SIRFUART_RX_IO_INT_EN(uint_en,
- sirfport->uart_reg->uart_type)));
- else
- wr_regl(port, ureg->sirfsoc_int_en_clr_reg,
- SIRFUART_RX_IO_INT_EN(uint_en,
- sirfport->uart_reg->uart_type));
- }
-}
-
-static void sirfsoc_uart_disable_ms(struct uart_port *port)
-{
- struct sirfsoc_uart_port *sirfport = to_sirfport(port);
- struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
- struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
-
- if (!sirfport->hw_flow_ctrl)
- return;
- sirfport->ms_enabled = false;
- if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) {
- wr_regl(port, ureg->sirfsoc_afc_ctrl,
- rd_regl(port, ureg->sirfsoc_afc_ctrl) & ~0x3FF);
- if (!sirfport->is_atlas7)
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- rd_regl(port, ureg->sirfsoc_int_en_reg)&
- ~uint_en->sirfsoc_cts_en);
- else
- wr_regl(port, ureg->sirfsoc_int_en_clr_reg,
- uint_en->sirfsoc_cts_en);
- } else
- disable_irq(gpio_to_irq(sirfport->cts_gpio));
-}
-
-static irqreturn_t sirfsoc_uart_usp_cts_handler(int irq, void *dev_id)
-{
- struct sirfsoc_uart_port *sirfport = (struct sirfsoc_uart_port *)dev_id;
- struct uart_port *port = &sirfport->port;
- spin_lock(&port->lock);
- if (gpio_is_valid(sirfport->cts_gpio) && sirfport->ms_enabled)
- uart_handle_cts_change(port,
- !gpio_get_value(sirfport->cts_gpio));
- spin_unlock(&port->lock);
- return IRQ_HANDLED;
-}
-
-static void sirfsoc_uart_enable_ms(struct uart_port *port)
-{
- struct sirfsoc_uart_port *sirfport = to_sirfport(port);
- struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
- struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
-
- if (!sirfport->hw_flow_ctrl)
- return;
- sirfport->ms_enabled = true;
- if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) {
- wr_regl(port, ureg->sirfsoc_afc_ctrl,
- rd_regl(port, ureg->sirfsoc_afc_ctrl) |
- SIRFUART_AFC_TX_EN | SIRFUART_AFC_RX_EN |
- SIRFUART_AFC_CTRL_RX_THD);
- if (!sirfport->is_atlas7)
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- rd_regl(port, ureg->sirfsoc_int_en_reg)
- | uint_en->sirfsoc_cts_en);
- else
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- uint_en->sirfsoc_cts_en);
- } else
- enable_irq(gpio_to_irq(sirfport->cts_gpio));
-}
-
-static void sirfsoc_uart_break_ctl(struct uart_port *port, int break_state)
-{
- struct sirfsoc_uart_port *sirfport = to_sirfport(port);
- struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
- if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) {
- unsigned long ulcon = rd_regl(port, ureg->sirfsoc_line_ctrl);
- if (break_state)
- ulcon |= SIRFUART_SET_BREAK;
- else
- ulcon &= ~SIRFUART_SET_BREAK;
- wr_regl(port, ureg->sirfsoc_line_ctrl, ulcon);
- }
-}
-
-static unsigned int
-sirfsoc_uart_pio_rx_chars(struct uart_port *port, unsigned int max_rx_count)
-{
- struct sirfsoc_uart_port *sirfport = to_sirfport(port);
- struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
- struct sirfsoc_fifo_status *ufifo_st = &sirfport->uart_reg->fifo_status;
- unsigned int ch, rx_count = 0;
- struct tty_struct *tty;
- tty = tty_port_tty_get(&port->state->port);
- if (!tty)
- return -ENODEV;
- while (!(rd_regl(port, ureg->sirfsoc_rx_fifo_status) &
- ufifo_st->ff_empty(port))) {
- ch = rd_regl(port, ureg->sirfsoc_rx_fifo_data) |
- SIRFUART_DUMMY_READ;
- if (unlikely(uart_handle_sysrq_char(port, ch)))
- continue;
- uart_insert_char(port, 0, 0, ch, TTY_NORMAL);
- rx_count++;
- if (rx_count >= max_rx_count)
- break;
- }
-
- port->icount.rx += rx_count;
-
- return rx_count;
-}
-
-static unsigned int
-sirfsoc_uart_pio_tx_chars(struct sirfsoc_uart_port *sirfport, int count)
-{
- struct uart_port *port = &sirfport->port;
- struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
- struct sirfsoc_fifo_status *ufifo_st = &sirfport->uart_reg->fifo_status;
- struct circ_buf *xmit = &port->state->xmit;
- unsigned int num_tx = 0;
- while (!uart_circ_empty(xmit) &&
- !(rd_regl(port, ureg->sirfsoc_tx_fifo_status) &
- ufifo_st->ff_full(port)) &&
- count--) {
- wr_regl(port, ureg->sirfsoc_tx_fifo_data,
- xmit->buf[xmit->tail]);
- xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
- port->icount.tx++;
- num_tx++;
- }
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
- uart_write_wakeup(port);
- return num_tx;
-}
-
-static void sirfsoc_uart_tx_dma_complete_callback(void *param)
-{
- struct sirfsoc_uart_port *sirfport = (struct sirfsoc_uart_port *)param;
- struct uart_port *port = &sirfport->port;
- struct circ_buf *xmit = &port->state->xmit;
- unsigned long flags;
-
- spin_lock_irqsave(&port->lock, flags);
- xmit->tail = (xmit->tail + sirfport->transfer_size) &
- (UART_XMIT_SIZE - 1);
- port->icount.tx += sirfport->transfer_size;
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
- uart_write_wakeup(port);
- if (sirfport->tx_dma_addr)
- dma_unmap_single(port->dev, sirfport->tx_dma_addr,
- sirfport->transfer_size, DMA_TO_DEVICE);
- sirfport->tx_dma_state = TX_DMA_IDLE;
- sirfsoc_uart_tx_with_dma(sirfport);
- spin_unlock_irqrestore(&port->lock, flags);
-}
-
-static irqreturn_t sirfsoc_uart_isr(int irq, void *dev_id)
-{
- unsigned long intr_status;
- unsigned long cts_status;
- unsigned long flag = TTY_NORMAL;
- struct sirfsoc_uart_port *sirfport = (struct sirfsoc_uart_port *)dev_id;
- struct uart_port *port = &sirfport->port;
- struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
- struct sirfsoc_fifo_status *ufifo_st = &sirfport->uart_reg->fifo_status;
- struct sirfsoc_int_status *uint_st = &sirfport->uart_reg->uart_int_st;
- struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
- struct uart_state *state = port->state;
- struct circ_buf *xmit = &port->state->xmit;
- spin_lock(&port->lock);
- intr_status = rd_regl(port, ureg->sirfsoc_int_st_reg);
- wr_regl(port, ureg->sirfsoc_int_st_reg, intr_status);
- intr_status &= rd_regl(port, ureg->sirfsoc_int_en_reg);
- if (unlikely(intr_status & (SIRFUART_ERR_INT_STAT(uint_st,
- sirfport->uart_reg->uart_type)))) {
- if (intr_status & uint_st->sirfsoc_rxd_brk) {
- port->icount.brk++;
- if (uart_handle_break(port))
- goto recv_char;
- }
- if (intr_status & uint_st->sirfsoc_rx_oflow) {
- port->icount.overrun++;
- flag = TTY_OVERRUN;
- }
- if (intr_status & uint_st->sirfsoc_frm_err) {
- port->icount.frame++;
- flag = TTY_FRAME;
- }
- if (intr_status & uint_st->sirfsoc_parity_err) {
- port->icount.parity++;
- flag = TTY_PARITY;
- }
- wr_regl(port, ureg->sirfsoc_rx_fifo_op, SIRFUART_FIFO_RESET);
- wr_regl(port, ureg->sirfsoc_rx_fifo_op, 0);
- wr_regl(port, ureg->sirfsoc_rx_fifo_op, SIRFUART_FIFO_START);
- intr_status &= port->read_status_mask;
- uart_insert_char(port, intr_status,
- uint_en->sirfsoc_rx_oflow_en, 0, flag);
- }
-recv_char:
- if ((sirfport->uart_reg->uart_type == SIRF_REAL_UART) &&
- (intr_status & SIRFUART_CTS_INT_ST(uint_st)) &&
- !sirfport->tx_dma_state) {
- cts_status = rd_regl(port, ureg->sirfsoc_afc_ctrl) &
- SIRFUART_AFC_CTS_STATUS;
- if (cts_status != 0)
- cts_status = 0;
- else
- cts_status = 1;
- uart_handle_cts_change(port, cts_status);
- wake_up_interruptible(&state->port.delta_msr_wait);
- }
- if (!sirfport->rx_dma_chan &&
- (intr_status & SIRFUART_RX_IO_INT_ST(uint_st))) {
- /*
- * chip will trigger continuous RX_TIMEOUT interrupt
- * in RXFIFO empty and not trigger if RXFIFO recevice
- * data in limit time, original method use RX_TIMEOUT
- * will trigger lots of useless interrupt in RXFIFO
- * empty.RXFIFO received one byte will trigger RX_DONE
- * interrupt.use RX_DONE to wait for data received
- * into RXFIFO, use RX_THD/RX_FULL for lots data receive
- * and use RX_TIMEOUT for the last left data.
- */
- if (intr_status & uint_st->sirfsoc_rx_done) {
- if (!sirfport->is_atlas7) {
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- rd_regl(port, ureg->sirfsoc_int_en_reg)
- & ~(uint_en->sirfsoc_rx_done_en));
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- rd_regl(port, ureg->sirfsoc_int_en_reg)
- | (uint_en->sirfsoc_rx_timeout_en));
- } else {
- wr_regl(port, ureg->sirfsoc_int_en_clr_reg,
- uint_en->sirfsoc_rx_done_en);
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- uint_en->sirfsoc_rx_timeout_en);
- }
- } else {
- if (intr_status & uint_st->sirfsoc_rx_timeout) {
- if (!sirfport->is_atlas7) {
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- rd_regl(port, ureg->sirfsoc_int_en_reg)
- & ~(uint_en->sirfsoc_rx_timeout_en));
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- rd_regl(port, ureg->sirfsoc_int_en_reg)
- | (uint_en->sirfsoc_rx_done_en));
- } else {
- wr_regl(port,
- ureg->sirfsoc_int_en_clr_reg,
- uint_en->sirfsoc_rx_timeout_en);
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- uint_en->sirfsoc_rx_done_en);
- }
- }
- sirfsoc_uart_pio_rx_chars(port, port->fifosize);
- }
- }
- spin_unlock(&port->lock);
- tty_flip_buffer_push(&state->port);
- spin_lock(&port->lock);
- if (intr_status & uint_st->sirfsoc_txfifo_empty) {
- if (sirfport->tx_dma_chan)
- sirfsoc_uart_tx_with_dma(sirfport);
- else {
- if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
- spin_unlock(&port->lock);
- return IRQ_HANDLED;
- } else {
- sirfsoc_uart_pio_tx_chars(sirfport,
- port->fifosize);
- if ((uart_circ_empty(xmit)) &&
- (rd_regl(port, ureg->sirfsoc_tx_fifo_status) &
- ufifo_st->ff_empty(port)))
- sirfsoc_uart_stop_tx(port);
- }
- }
- }
- spin_unlock(&port->lock);
-
- return IRQ_HANDLED;
-}
-
-static void sirfsoc_uart_rx_dma_complete_callback(void *param)
-{
-}
-
-/* submit rx dma task into dmaengine */
-static void sirfsoc_uart_start_next_rx_dma(struct uart_port *port)
-{
- struct sirfsoc_uart_port *sirfport = to_sirfport(port);
- struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
- struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
- wr_regl(port, ureg->sirfsoc_rx_dma_io_ctrl,
- rd_regl(port, ureg->sirfsoc_rx_dma_io_ctrl) &
- ~SIRFUART_IO_MODE);
- sirfport->rx_dma_items.xmit.tail =
- sirfport->rx_dma_items.xmit.head = 0;
- sirfport->rx_dma_items.desc =
- dmaengine_prep_dma_cyclic(sirfport->rx_dma_chan,
- sirfport->rx_dma_items.dma_addr, SIRFSOC_RX_DMA_BUF_SIZE,
- SIRFSOC_RX_DMA_BUF_SIZE / 2,
- DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT);
- if (IS_ERR_OR_NULL(sirfport->rx_dma_items.desc)) {
- dev_err(port->dev, "DMA slave single fail\n");
- return;
- }
- sirfport->rx_dma_items.desc->callback =
- sirfsoc_uart_rx_dma_complete_callback;
- sirfport->rx_dma_items.desc->callback_param = sirfport;
- sirfport->rx_dma_items.cookie =
- dmaengine_submit(sirfport->rx_dma_items.desc);
- dma_async_issue_pending(sirfport->rx_dma_chan);
- if (!sirfport->is_atlas7)
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- rd_regl(port, ureg->sirfsoc_int_en_reg) |
- SIRFUART_RX_DMA_INT_EN(uint_en,
- sirfport->uart_reg->uart_type));
- else
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- SIRFUART_RX_DMA_INT_EN(uint_en,
- sirfport->uart_reg->uart_type));
-}
-
-static unsigned int
-sirfsoc_usp_calc_sample_div(unsigned long set_rate,
- unsigned long ioclk_rate, unsigned long *sample_reg)
-{
- unsigned long min_delta = ~0UL;
- unsigned short sample_div;
- unsigned long ioclk_div = 0;
- unsigned long temp_delta;
-
- for (sample_div = SIRF_USP_MIN_SAMPLE_DIV;
- sample_div <= SIRF_MAX_SAMPLE_DIV; sample_div++) {
- temp_delta = ioclk_rate -
- (ioclk_rate + (set_rate * sample_div) / 2)
- / (set_rate * sample_div) * set_rate * sample_div;
-
- temp_delta = (temp_delta > 0) ? temp_delta : -temp_delta;
- if (temp_delta < min_delta) {
- ioclk_div = (2 * ioclk_rate /
- (set_rate * sample_div) + 1) / 2 - 1;
- if (ioclk_div > SIRF_IOCLK_DIV_MAX)
- continue;
- min_delta = temp_delta;
- *sample_reg = sample_div;
- if (!temp_delta)
- break;
- }
- }
- return ioclk_div;
-}
-
-static unsigned int
-sirfsoc_uart_calc_sample_div(unsigned long baud_rate,
- unsigned long ioclk_rate, unsigned long *set_baud)
-{
- unsigned long min_delta = ~0UL;
- unsigned short sample_div;
- unsigned int regv = 0;
- unsigned long ioclk_div;
- unsigned long baud_tmp;
- int temp_delta;
-
- for (sample_div = SIRF_MIN_SAMPLE_DIV;
- sample_div <= SIRF_MAX_SAMPLE_DIV; sample_div++) {
- ioclk_div = (ioclk_rate / (baud_rate * (sample_div + 1))) - 1;
- if (ioclk_div > SIRF_IOCLK_DIV_MAX)
- continue;
- baud_tmp = ioclk_rate / ((ioclk_div + 1) * (sample_div + 1));
- temp_delta = baud_tmp - baud_rate;
- temp_delta = (temp_delta > 0) ? temp_delta : -temp_delta;
- if (temp_delta < min_delta) {
- regv = regv & (~SIRF_IOCLK_DIV_MASK);
- regv = regv | ioclk_div;
- regv = regv & (~SIRF_SAMPLE_DIV_MASK);
- regv = regv | (sample_div << SIRF_SAMPLE_DIV_SHIFT);
- min_delta = temp_delta;
- *set_baud = baud_tmp;
- }
- }
- return regv;
-}
-
-static void sirfsoc_uart_set_termios(struct uart_port *port,
- struct ktermios *termios,
- struct ktermios *old)
-{
- struct sirfsoc_uart_port *sirfport = to_sirfport(port);
- struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
- struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
- unsigned long config_reg = 0;
- unsigned long baud_rate;
- unsigned long set_baud;
- unsigned long flags;
- unsigned long ic;
- unsigned int clk_div_reg = 0;
- unsigned long txfifo_op_reg, ioclk_rate;
- unsigned long rx_time_out;
- int threshold_div;
- u32 data_bit_len, stop_bit_len, len_val;
- unsigned long sample_div_reg = 0xf;
- ioclk_rate = port->uartclk;
-
- switch (termios->c_cflag & CSIZE) {
- default:
- case CS8:
- data_bit_len = 8;
- config_reg |= SIRFUART_DATA_BIT_LEN_8;
- break;
- case CS7:
- data_bit_len = 7;
- config_reg |= SIRFUART_DATA_BIT_LEN_7;
- break;
- case CS6:
- data_bit_len = 6;
- config_reg |= SIRFUART_DATA_BIT_LEN_6;
- break;
- case CS5:
- data_bit_len = 5;
- config_reg |= SIRFUART_DATA_BIT_LEN_5;
- break;
- }
- if (termios->c_cflag & CSTOPB) {
- config_reg |= SIRFUART_STOP_BIT_LEN_2;
- stop_bit_len = 2;
- } else
- stop_bit_len = 1;
-
- spin_lock_irqsave(&port->lock, flags);
- port->read_status_mask = uint_en->sirfsoc_rx_oflow_en;
- port->ignore_status_mask = 0;
- if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) {
- if (termios->c_iflag & INPCK)
- port->read_status_mask |= uint_en->sirfsoc_frm_err_en |
- uint_en->sirfsoc_parity_err_en;
- } else {
- if (termios->c_iflag & INPCK)
- port->read_status_mask |= uint_en->sirfsoc_frm_err_en;
- }
- if (termios->c_iflag & (IGNBRK | BRKINT | PARMRK))
- port->read_status_mask |= uint_en->sirfsoc_rxd_brk_en;
- if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) {
- if (termios->c_iflag & IGNPAR)
- port->ignore_status_mask |=
- uint_en->sirfsoc_frm_err_en |
- uint_en->sirfsoc_parity_err_en;
- if (termios->c_cflag & PARENB) {
- if (termios->c_cflag & CMSPAR) {
- if (termios->c_cflag & PARODD)
- config_reg |= SIRFUART_STICK_BIT_MARK;
- else
- config_reg |= SIRFUART_STICK_BIT_SPACE;
- } else {
- if (termios->c_cflag & PARODD)
- config_reg |= SIRFUART_STICK_BIT_ODD;
- else
- config_reg |= SIRFUART_STICK_BIT_EVEN;
- }
- }
- } else {
- if (termios->c_iflag & IGNPAR)
- port->ignore_status_mask |=
- uint_en->sirfsoc_frm_err_en;
- if (termios->c_cflag & PARENB)
- dev_warn(port->dev,
- "USP-UART not support parity err\n");
- }
- if (termios->c_iflag & IGNBRK) {
- port->ignore_status_mask |=
- uint_en->sirfsoc_rxd_brk_en;
- if (termios->c_iflag & IGNPAR)
- port->ignore_status_mask |=
- uint_en->sirfsoc_rx_oflow_en;
- }
- if ((termios->c_cflag & CREAD) == 0)
- port->ignore_status_mask |= SIRFUART_DUMMY_READ;
- /* Hardware Flow Control Settings */
- if (UART_ENABLE_MS(port, termios->c_cflag)) {
- if (!sirfport->ms_enabled)
- sirfsoc_uart_enable_ms(port);
- } else {
- if (sirfport->ms_enabled)
- sirfsoc_uart_disable_ms(port);
- }
- baud_rate = uart_get_baud_rate(port, termios, old, 0, 4000000);
- if (ioclk_rate == 150000000) {
- for (ic = 0; ic < SIRF_BAUD_RATE_SUPPORT_NR; ic++)
- if (baud_rate == baudrate_to_regv[ic].baud_rate)
- clk_div_reg = baudrate_to_regv[ic].reg_val;
- }
- set_baud = baud_rate;
- if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) {
- if (unlikely(clk_div_reg == 0))
- clk_div_reg = sirfsoc_uart_calc_sample_div(baud_rate,
- ioclk_rate, &set_baud);
- wr_regl(port, ureg->sirfsoc_divisor, clk_div_reg);
- } else {
- clk_div_reg = sirfsoc_usp_calc_sample_div(baud_rate,
- ioclk_rate, &sample_div_reg);
- sample_div_reg--;
- set_baud = ((ioclk_rate / (clk_div_reg+1) - 1) /
- (sample_div_reg + 1));
- /* setting usp mode 2 */
- len_val = ((1 << SIRFSOC_USP_MODE2_RXD_DELAY_OFFSET) |
- (1 << SIRFSOC_USP_MODE2_TXD_DELAY_OFFSET));
- len_val |= ((clk_div_reg & SIRFSOC_USP_MODE2_CLK_DIVISOR_MASK)
- << SIRFSOC_USP_MODE2_CLK_DIVISOR_OFFSET);
- wr_regl(port, ureg->sirfsoc_mode2, len_val);
- }
- if (tty_termios_baud_rate(termios))
- tty_termios_encode_baud_rate(termios, set_baud, set_baud);
- /* set receive timeout && data bits len */
- rx_time_out = SIRFSOC_UART_RX_TIMEOUT(set_baud, 20000);
- rx_time_out = SIRFUART_RECV_TIMEOUT_VALUE(rx_time_out);
- txfifo_op_reg = rd_regl(port, ureg->sirfsoc_tx_fifo_op);
- wr_regl(port, ureg->sirfsoc_tx_fifo_op,
- (txfifo_op_reg & ~SIRFUART_FIFO_START));
- if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) {
- config_reg |= SIRFUART_UART_RECV_TIMEOUT(rx_time_out);
- wr_regl(port, ureg->sirfsoc_line_ctrl, config_reg);
- } else {
- /*tx frame ctrl*/
- len_val = (data_bit_len - 1) << SIRFSOC_USP_TX_DATA_LEN_OFFSET;
- len_val |= (data_bit_len + 1 + stop_bit_len - 1) <<
- SIRFSOC_USP_TX_FRAME_LEN_OFFSET;
- len_val |= ((data_bit_len - 1) <<
- SIRFSOC_USP_TX_SHIFTER_LEN_OFFSET);
- len_val |= (((clk_div_reg & 0xc00) >> 10) <<
- SIRFSOC_USP_TX_CLK_DIVISOR_OFFSET);
- wr_regl(port, ureg->sirfsoc_tx_frame_ctrl, len_val);
- /*rx frame ctrl*/
- len_val = (data_bit_len - 1) << SIRFSOC_USP_RX_DATA_LEN_OFFSET;
- len_val |= (data_bit_len + 1 + stop_bit_len - 1) <<
- SIRFSOC_USP_RX_FRAME_LEN_OFFSET;
- len_val |= (data_bit_len - 1) <<
- SIRFSOC_USP_RX_SHIFTER_LEN_OFFSET;
- len_val |= (((clk_div_reg & 0xf000) >> 12) <<
- SIRFSOC_USP_RX_CLK_DIVISOR_OFFSET);
- wr_regl(port, ureg->sirfsoc_rx_frame_ctrl, len_val);
- /*async param*/
- wr_regl(port, ureg->sirfsoc_async_param_reg,
- (SIRFUART_USP_RECV_TIMEOUT(rx_time_out)) |
- (sample_div_reg & SIRFSOC_USP_ASYNC_DIV2_MASK) <<
- SIRFSOC_USP_ASYNC_DIV2_OFFSET);
- }
- if (sirfport->tx_dma_chan)
- wr_regl(port, ureg->sirfsoc_tx_dma_io_ctrl, SIRFUART_DMA_MODE);
- else
- wr_regl(port, ureg->sirfsoc_tx_dma_io_ctrl, SIRFUART_IO_MODE);
- if (sirfport->rx_dma_chan)
- wr_regl(port, ureg->sirfsoc_rx_dma_io_ctrl,
- rd_regl(port, ureg->sirfsoc_rx_dma_io_ctrl) &
- ~SIRFUART_IO_MODE);
- else
- wr_regl(port, ureg->sirfsoc_rx_dma_io_ctrl,
- rd_regl(port, ureg->sirfsoc_rx_dma_io_ctrl) |
- SIRFUART_IO_MODE);
- sirfport->rx_period_time = 20000000;
- /* Reset Rx/Tx FIFO Threshold level for proper baudrate */
- if (set_baud < 1000000)
- threshold_div = 1;
- else
- threshold_div = 2;
- wr_regl(port, ureg->sirfsoc_tx_fifo_ctrl,
- SIRFUART_FIFO_THD(port) / threshold_div);
- wr_regl(port, ureg->sirfsoc_rx_fifo_ctrl,
- SIRFUART_FIFO_THD(port) / threshold_div);
- txfifo_op_reg |= SIRFUART_FIFO_START;
- wr_regl(port, ureg->sirfsoc_tx_fifo_op, txfifo_op_reg);
- uart_update_timeout(port, termios->c_cflag, set_baud);
- wr_regl(port, ureg->sirfsoc_tx_rx_en, SIRFUART_TX_EN | SIRFUART_RX_EN);
- spin_unlock_irqrestore(&port->lock, flags);
-}
-
-static void sirfsoc_uart_pm(struct uart_port *port, unsigned int state,
- unsigned int oldstate)
-{
- struct sirfsoc_uart_port *sirfport = to_sirfport(port);
- if (!state)
- clk_prepare_enable(sirfport->clk);
- else
- clk_disable_unprepare(sirfport->clk);
-}
-
-static int sirfsoc_uart_startup(struct uart_port *port)
-{
- struct sirfsoc_uart_port *sirfport = to_sirfport(port);
- struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
- struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
- unsigned int index = port->line;
- int ret;
- irq_modify_status(port->irq, IRQ_NOREQUEST, IRQ_NOAUTOEN);
- ret = request_irq(port->irq,
- sirfsoc_uart_isr,
- 0,
- SIRFUART_PORT_NAME,
- sirfport);
- if (ret != 0) {
- dev_err(port->dev, "UART%d request IRQ line (%d) failed.\n",
- index, port->irq);
- goto irq_err;
- }
- /* initial hardware settings */
- wr_regl(port, ureg->sirfsoc_tx_dma_io_ctrl,
- rd_regl(port, ureg->sirfsoc_tx_dma_io_ctrl) |
- SIRFUART_IO_MODE);
- wr_regl(port, ureg->sirfsoc_rx_dma_io_ctrl,
- rd_regl(port, ureg->sirfsoc_rx_dma_io_ctrl) |
- SIRFUART_IO_MODE);
- wr_regl(port, ureg->sirfsoc_rx_dma_io_ctrl,
- rd_regl(port, ureg->sirfsoc_rx_dma_io_ctrl) &
- ~SIRFUART_RX_DMA_FLUSH);
- wr_regl(port, ureg->sirfsoc_tx_dma_io_len, 0);
- wr_regl(port, ureg->sirfsoc_rx_dma_io_len, 0);
- wr_regl(port, ureg->sirfsoc_tx_rx_en, SIRFUART_RX_EN | SIRFUART_TX_EN);
- if (sirfport->uart_reg->uart_type == SIRF_USP_UART)
- wr_regl(port, ureg->sirfsoc_mode1,
- SIRFSOC_USP_ENDIAN_CTRL_LSBF |
- SIRFSOC_USP_EN);
- wr_regl(port, ureg->sirfsoc_tx_fifo_op, SIRFUART_FIFO_RESET);
- wr_regl(port, ureg->sirfsoc_rx_fifo_op, SIRFUART_FIFO_RESET);
- wr_regl(port, ureg->sirfsoc_rx_fifo_op, 0);
- wr_regl(port, ureg->sirfsoc_tx_fifo_ctrl, SIRFUART_FIFO_THD(port));
- wr_regl(port, ureg->sirfsoc_rx_fifo_ctrl, SIRFUART_FIFO_THD(port));
- if (sirfport->rx_dma_chan)
- wr_regl(port, ureg->sirfsoc_rx_fifo_level_chk,
- SIRFUART_RX_FIFO_CHK_SC(port->line, 0x1) |
- SIRFUART_RX_FIFO_CHK_LC(port->line, 0x2) |
- SIRFUART_RX_FIFO_CHK_HC(port->line, 0x4));
- if (sirfport->tx_dma_chan) {
- sirfport->tx_dma_state = TX_DMA_IDLE;
- wr_regl(port, ureg->sirfsoc_tx_fifo_level_chk,
- SIRFUART_TX_FIFO_CHK_SC(port->line, 0x1b) |
- SIRFUART_TX_FIFO_CHK_LC(port->line, 0xe) |
- SIRFUART_TX_FIFO_CHK_HC(port->line, 0x4));
- }
- sirfport->ms_enabled = false;
- if (sirfport->uart_reg->uart_type == SIRF_USP_UART &&
- sirfport->hw_flow_ctrl) {
- irq_modify_status(gpio_to_irq(sirfport->cts_gpio),
- IRQ_NOREQUEST, IRQ_NOAUTOEN);
- ret = request_irq(gpio_to_irq(sirfport->cts_gpio),
- sirfsoc_uart_usp_cts_handler, IRQF_TRIGGER_FALLING |
- IRQF_TRIGGER_RISING, "usp_cts_irq", sirfport);
- if (ret != 0) {
- dev_err(port->dev, "UART-USP:request gpio irq fail\n");
- goto init_rx_err;
- }
- }
- if (sirfport->uart_reg->uart_type == SIRF_REAL_UART &&
- sirfport->rx_dma_chan)
- wr_regl(port, ureg->sirfsoc_swh_dma_io,
- SIRFUART_CLEAR_RX_ADDR_EN);
- if (sirfport->uart_reg->uart_type == SIRF_USP_UART &&
- sirfport->rx_dma_chan)
- wr_regl(port, ureg->sirfsoc_rx_dma_io_ctrl,
- rd_regl(port, ureg->sirfsoc_rx_dma_io_ctrl) |
- SIRFSOC_USP_FRADDR_CLR_EN);
- if (sirfport->rx_dma_chan && !sirfport->is_hrt_enabled) {
- sirfport->is_hrt_enabled = true;
- sirfport->rx_period_time = 20000000;
- sirfport->rx_last_pos = -1;
- sirfport->pio_fetch_cnt = 0;
- sirfport->rx_dma_items.xmit.tail =
- sirfport->rx_dma_items.xmit.head = 0;
- hrtimer_start(&sirfport->hrt,
- ns_to_ktime(sirfport->rx_period_time),
- HRTIMER_MODE_REL);
- }
- wr_regl(port, ureg->sirfsoc_rx_fifo_op, SIRFUART_FIFO_START);
- if (sirfport->rx_dma_chan)
- sirfsoc_uart_start_next_rx_dma(port);
- else {
- if (!sirfport->is_atlas7)
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- rd_regl(port, ureg->sirfsoc_int_en_reg) |
- SIRFUART_RX_IO_INT_EN(uint_en,
- sirfport->uart_reg->uart_type));
- else
- wr_regl(port, ureg->sirfsoc_int_en_reg,
- SIRFUART_RX_IO_INT_EN(uint_en,
- sirfport->uart_reg->uart_type));
- }
- enable_irq(port->irq);
-
- return 0;
-init_rx_err:
- free_irq(port->irq, sirfport);
-irq_err:
- return ret;
-}
-
-static void sirfsoc_uart_shutdown(struct uart_port *port)
-{
- struct sirfsoc_uart_port *sirfport = to_sirfport(port);
- struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
- struct circ_buf *xmit;
-
- xmit = &sirfport->rx_dma_items.xmit;
- if (!sirfport->is_atlas7)
- wr_regl(port, ureg->sirfsoc_int_en_reg, 0);
- else
- wr_regl(port, ureg->sirfsoc_int_en_clr_reg, ~0UL);
-
- free_irq(port->irq, sirfport);
- if (sirfport->ms_enabled)
- sirfsoc_uart_disable_ms(port);
- if (sirfport->uart_reg->uart_type == SIRF_USP_UART &&
- sirfport->hw_flow_ctrl) {
- gpio_set_value(sirfport->rts_gpio, 1);
- free_irq(gpio_to_irq(sirfport->cts_gpio), sirfport);
- }
- if (sirfport->tx_dma_chan)
- sirfport->tx_dma_state = TX_DMA_IDLE;
- if (sirfport->rx_dma_chan && sirfport->is_hrt_enabled) {
- while (((rd_regl(port, ureg->sirfsoc_rx_fifo_status) &
- SIRFUART_RX_FIFO_MASK) > sirfport->pio_fetch_cnt) &&
- !CIRC_CNT(xmit->head, xmit->tail,
- SIRFSOC_RX_DMA_BUF_SIZE))
- ;
- sirfport->is_hrt_enabled = false;
- hrtimer_cancel(&sirfport->hrt);
- }
-}
-
-static const char *sirfsoc_uart_type(struct uart_port *port)
-{
- return port->type == SIRFSOC_PORT_TYPE ? SIRFUART_PORT_NAME : NULL;
-}
-
-static int sirfsoc_uart_request_port(struct uart_port *port)
-{
- struct sirfsoc_uart_port *sirfport = to_sirfport(port);
- struct sirfsoc_uart_param *uart_param = &sirfport->uart_reg->uart_param;
- void *ret;
- ret = request_mem_region(port->mapbase,
- SIRFUART_MAP_SIZE, uart_param->port_name);
- return ret ? 0 : -EBUSY;
-}
-
-static void sirfsoc_uart_release_port(struct uart_port *port)
-{
- release_mem_region(port->mapbase, SIRFUART_MAP_SIZE);
-}
-
-static void sirfsoc_uart_config_port(struct uart_port *port, int flags)
-{
- if (flags & UART_CONFIG_TYPE) {
- port->type = SIRFSOC_PORT_TYPE;
- sirfsoc_uart_request_port(port);
- }
-}
-
-static const struct uart_ops sirfsoc_uart_ops = {
- .tx_empty = sirfsoc_uart_tx_empty,
- .get_mctrl = sirfsoc_uart_get_mctrl,
- .set_mctrl = sirfsoc_uart_set_mctrl,
- .stop_tx = sirfsoc_uart_stop_tx,
- .start_tx = sirfsoc_uart_start_tx,
- .stop_rx = sirfsoc_uart_stop_rx,
- .enable_ms = sirfsoc_uart_enable_ms,
- .break_ctl = sirfsoc_uart_break_ctl,
- .startup = sirfsoc_uart_startup,
- .shutdown = sirfsoc_uart_shutdown,
- .set_termios = sirfsoc_uart_set_termios,
- .pm = sirfsoc_uart_pm,
- .type = sirfsoc_uart_type,
- .release_port = sirfsoc_uart_release_port,
- .request_port = sirfsoc_uart_request_port,
- .config_port = sirfsoc_uart_config_port,
-};
-
-#ifdef CONFIG_SERIAL_SIRFSOC_CONSOLE
-static int __init
-sirfsoc_uart_console_setup(struct console *co, char *options)
-{
- unsigned int baud = 115200;
- unsigned int bits = 8;
- unsigned int parity = 'n';
- unsigned int flow = 'n';
- struct sirfsoc_uart_port *sirfport;
- struct sirfsoc_register *ureg;
- if (co->index < 0 || co->index >= SIRFSOC_UART_NR)
- co->index = 1;
- sirfport = sirf_ports[co->index];
- if (!sirfport)
- return -ENODEV;
- ureg = &sirfport->uart_reg->uart_reg;
- if (!sirfport->port.mapbase)
- return -ENODEV;
-
- /* enable usp in mode1 register */
- if (sirfport->uart_reg->uart_type == SIRF_USP_UART)
- wr_regl(&sirfport->port, ureg->sirfsoc_mode1, SIRFSOC_USP_EN |
- SIRFSOC_USP_ENDIAN_CTRL_LSBF);
- if (options)
- uart_parse_options(options, &baud, &parity, &bits, &flow);
- sirfport->port.cons = co;
-
- /* default console tx/rx transfer using io mode */
- sirfport->rx_dma_chan = NULL;
- sirfport->tx_dma_chan = NULL;
- return uart_set_options(&sirfport->port, co, baud, parity, bits, flow);
-}
-
-static void sirfsoc_uart_console_putchar(struct uart_port *port, int ch)
-{
- struct sirfsoc_uart_port *sirfport = to_sirfport(port);
- struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
- struct sirfsoc_fifo_status *ufifo_st = &sirfport->uart_reg->fifo_status;
- while (rd_regl(port, ureg->sirfsoc_tx_fifo_status) &
- ufifo_st->ff_full(port))
- cpu_relax();
- wr_regl(port, ureg->sirfsoc_tx_fifo_data, ch);
-}
-
-static void sirfsoc_uart_console_write(struct console *co, const char *s,
- unsigned int count)
-{
- struct sirfsoc_uart_port *sirfport = sirf_ports[co->index];
-
- uart_console_write(&sirfport->port, s, count,
- sirfsoc_uart_console_putchar);
-}
-
-static struct console sirfsoc_uart_console = {
- .name = SIRFSOC_UART_NAME,
- .device = uart_console_device,
- .flags = CON_PRINTBUFFER,
- .index = -1,
- .write = sirfsoc_uart_console_write,
- .setup = sirfsoc_uart_console_setup,
- .data = &sirfsoc_uart_drv,
-};
-
-static int __init sirfsoc_uart_console_init(void)
-{
- register_console(&sirfsoc_uart_console);
- return 0;
-}
-console_initcall(sirfsoc_uart_console_init);
-#endif
-
-static struct uart_driver sirfsoc_uart_drv = {
- .owner = THIS_MODULE,
- .driver_name = SIRFUART_PORT_NAME,
- .nr = SIRFSOC_UART_NR,
- .dev_name = SIRFSOC_UART_NAME,
- .major = SIRFSOC_UART_MAJOR,
- .minor = SIRFSOC_UART_MINOR,
-#ifdef CONFIG_SERIAL_SIRFSOC_CONSOLE
- .cons = &sirfsoc_uart_console,
-#else
- .cons = NULL,
-#endif
-};
-
-static enum hrtimer_restart
- sirfsoc_uart_rx_dma_hrtimer_callback(struct hrtimer *hrt)
-{
- struct sirfsoc_uart_port *sirfport;
- struct uart_port *port;
- int count, inserted;
- struct dma_tx_state tx_state;
- struct tty_struct *tty;
- struct sirfsoc_register *ureg;
- struct circ_buf *xmit;
- struct sirfsoc_fifo_status *ufifo_st;
- int max_pio_cnt;
-
- sirfport = container_of(hrt, struct sirfsoc_uart_port, hrt);
- port = &sirfport->port;
- inserted = 0;
- tty = port->state->port.tty;
- ureg = &sirfport->uart_reg->uart_reg;
- xmit = &sirfport->rx_dma_items.xmit;
- ufifo_st = &sirfport->uart_reg->fifo_status;
-
- dmaengine_tx_status(sirfport->rx_dma_chan,
- sirfport->rx_dma_items.cookie, &tx_state);
- if (SIRFSOC_RX_DMA_BUF_SIZE - tx_state.residue !=
- sirfport->rx_last_pos) {
- xmit->head = SIRFSOC_RX_DMA_BUF_SIZE - tx_state.residue;
- sirfport->rx_last_pos = xmit->head;
- sirfport->pio_fetch_cnt = 0;
- }
- count = CIRC_CNT_TO_END(xmit->head, xmit->tail,
- SIRFSOC_RX_DMA_BUF_SIZE);
- while (count > 0) {
- inserted = tty_insert_flip_string(tty->port,
- (const unsigned char *)&xmit->buf[xmit->tail], count);
- if (!inserted)
- goto next_hrt;
- port->icount.rx += inserted;
- xmit->tail = (xmit->tail + inserted) &
- (SIRFSOC_RX_DMA_BUF_SIZE - 1);
- count = CIRC_CNT_TO_END(xmit->head, xmit->tail,
- SIRFSOC_RX_DMA_BUF_SIZE);
- tty_flip_buffer_push(tty->port);
- }
- /*
- * if RX DMA buffer data have all push into tty buffer, and there is
- * only little data(less than a dma transfer unit) left in rxfifo,
- * fetch it out in pio mode and switch back to dma immediately
- */
- if (!inserted && !count &&
- ((rd_regl(port, ureg->sirfsoc_rx_fifo_status) &
- SIRFUART_RX_FIFO_MASK) > sirfport->pio_fetch_cnt)) {
- dmaengine_pause(sirfport->rx_dma_chan);
- /* switch to pio mode */
- wr_regl(port, ureg->sirfsoc_rx_dma_io_ctrl,
- rd_regl(port, ureg->sirfsoc_rx_dma_io_ctrl) |
- SIRFUART_IO_MODE);
- /*
- * UART controller SWH_DMA_IO register have CLEAR_RX_ADDR_EN
- * When found changing I/O to DMA mode, it clears
- * two low bits of read point;
- * USP have similar FRADDR_CLR_EN bit in USP_RX_DMA_IO_CTRL.
- * Fetch data out from rxfifo into DMA buffer in PIO mode,
- * while switch back to DMA mode, the data fetched will override
- * by DMA, as hardware have a strange behaviour:
- * after switch back to DMA mode, check rxfifo status it will
- * be the number PIO fetched, so record the fetched data count
- * to avoid the repeated fetch
- */
- max_pio_cnt = 3;
- while (!(rd_regl(port, ureg->sirfsoc_rx_fifo_status) &
- ufifo_st->ff_empty(port)) && max_pio_cnt--) {
- xmit->buf[xmit->head] =
- rd_regl(port, ureg->sirfsoc_rx_fifo_data);
- xmit->head = (xmit->head + 1) &
- (SIRFSOC_RX_DMA_BUF_SIZE - 1);
- sirfport->pio_fetch_cnt++;
- }
- /* switch back to dma mode */
- wr_regl(port, ureg->sirfsoc_rx_dma_io_ctrl,
- rd_regl(port, ureg->sirfsoc_rx_dma_io_ctrl) &
- ~SIRFUART_IO_MODE);
- dmaengine_resume(sirfport->rx_dma_chan);
- }
-next_hrt:
- hrtimer_forward_now(hrt, ns_to_ktime(sirfport->rx_period_time));
- return HRTIMER_RESTART;
-}
-
-static const struct of_device_id sirfsoc_uart_ids[] = {
- { .compatible = "sirf,prima2-uart", .data = &sirfsoc_uart,},
- { .compatible = "sirf,atlas7-uart", .data = &sirfsoc_uart},
- { .compatible = "sirf,prima2-usp-uart", .data = &sirfsoc_usp},
- { .compatible = "sirf,atlas7-usp-uart", .data = &sirfsoc_usp},
- {}
-};
-MODULE_DEVICE_TABLE(of, sirfsoc_uart_ids);
-
-static int sirfsoc_uart_probe(struct platform_device *pdev)
-{
- struct device_node *np = pdev->dev.of_node;
- struct sirfsoc_uart_port *sirfport;
- struct uart_port *port;
- struct resource *res;
- int ret;
- struct dma_slave_config slv_cfg = {
- .src_maxburst = 1,
- };
- struct dma_slave_config tx_slv_cfg = {
- .dst_maxburst = 2,
- };
- const struct of_device_id *match;
-
- match = of_match_node(sirfsoc_uart_ids, np);
- sirfport = devm_kzalloc(&pdev->dev, sizeof(*sirfport), GFP_KERNEL);
- if (!sirfport) {
- ret = -ENOMEM;
- goto err;
- }
- sirfport->port.line = of_alias_get_id(np, "serial");
- if (sirfport->port.line >= ARRAY_SIZE(sirf_ports)) {
- dev_err(&pdev->dev, "serial%d out of range\n",
- sirfport->port.line);
- return -EINVAL;
- }
- sirf_ports[sirfport->port.line] = sirfport;
- sirfport->port.iotype = UPIO_MEM;
- sirfport->port.flags = UPF_BOOT_AUTOCONF;
- port = &sirfport->port;
- port->dev = &pdev->dev;
- port->private_data = sirfport;
- sirfport->uart_reg = (struct sirfsoc_uart_register *)match->data;
-
- sirfport->hw_flow_ctrl =
- of_property_read_bool(np, "uart-has-rtscts") ||
- of_property_read_bool(np, "sirf,uart-has-rtscts") /* deprecated */;
- if (of_device_is_compatible(np, "sirf,prima2-uart") ||
- of_device_is_compatible(np, "sirf,atlas7-uart"))
- sirfport->uart_reg->uart_type = SIRF_REAL_UART;
- if (of_device_is_compatible(np, "sirf,prima2-usp-uart") ||
- of_device_is_compatible(np, "sirf,atlas7-usp-uart")) {
- sirfport->uart_reg->uart_type = SIRF_USP_UART;
- if (!sirfport->hw_flow_ctrl)
- goto usp_no_flow_control;
- if (of_find_property(np, "cts-gpios", NULL))
- sirfport->cts_gpio =
- of_get_named_gpio(np, "cts-gpios", 0);
- else
- sirfport->cts_gpio = -1;
- if (of_find_property(np, "rts-gpios", NULL))
- sirfport->rts_gpio =
- of_get_named_gpio(np, "rts-gpios", 0);
- else
- sirfport->rts_gpio = -1;
-
- if ((!gpio_is_valid(sirfport->cts_gpio) ||
- !gpio_is_valid(sirfport->rts_gpio))) {
- ret = -EINVAL;
- dev_err(&pdev->dev,
- "Usp flow control must have cts and rts gpio");
- goto err;
- }
- ret = devm_gpio_request(&pdev->dev, sirfport->cts_gpio,
- "usp-cts-gpio");
- if (ret) {
- dev_err(&pdev->dev, "Unable request cts gpio");
- goto err;
- }
- gpio_direction_input(sirfport->cts_gpio);
- ret = devm_gpio_request(&pdev->dev, sirfport->rts_gpio,
- "usp-rts-gpio");
- if (ret) {
- dev_err(&pdev->dev, "Unable request rts gpio");
- goto err;
- }
- gpio_direction_output(sirfport->rts_gpio, 1);
- }
-usp_no_flow_control:
- if (of_device_is_compatible(np, "sirf,atlas7-uart") ||
- of_device_is_compatible(np, "sirf,atlas7-usp-uart"))
- sirfport->is_atlas7 = true;
-
- if (of_property_read_u32(np, "fifosize", &port->fifosize)) {
- dev_err(&pdev->dev,
- "Unable to find fifosize in uart node.\n");
- ret = -EFAULT;
- goto err;
- }
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (res == NULL) {
- dev_err(&pdev->dev, "Insufficient resources.\n");
- ret = -EFAULT;
- goto err;
- }
- port->mapbase = res->start;
- port->membase = devm_ioremap(&pdev->dev,
- res->start, resource_size(res));
- if (!port->membase) {
- dev_err(&pdev->dev, "Cannot remap resource.\n");
- ret = -ENOMEM;
- goto err;
- }
- res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (res == NULL) {
- dev_err(&pdev->dev, "Insufficient resources.\n");
- ret = -EFAULT;
- goto err;
- }
- port->irq = res->start;
-
- sirfport->clk = devm_clk_get(&pdev->dev, NULL);
- if (IS_ERR(sirfport->clk)) {
- ret = PTR_ERR(sirfport->clk);
- goto err;
- }
- port->uartclk = clk_get_rate(sirfport->clk);
-
- port->ops = &sirfsoc_uart_ops;
- spin_lock_init(&port->lock);
-
- platform_set_drvdata(pdev, sirfport);
- ret = uart_add_one_port(&sirfsoc_uart_drv, port);
- if (ret != 0) {
- dev_err(&pdev->dev, "Cannot add UART port(%d).\n", pdev->id);
- goto err;
- }
-
- sirfport->rx_dma_chan = dma_request_slave_channel(port->dev, "rx");
- sirfport->rx_dma_items.xmit.buf =
- dma_alloc_coherent(port->dev, SIRFSOC_RX_DMA_BUF_SIZE,
- &sirfport->rx_dma_items.dma_addr, GFP_KERNEL);
- if (!sirfport->rx_dma_items.xmit.buf) {
- dev_err(port->dev, "Uart alloc bufa failed\n");
- ret = -ENOMEM;
- goto alloc_coherent_err;
- }
- sirfport->rx_dma_items.xmit.head =
- sirfport->rx_dma_items.xmit.tail = 0;
- if (sirfport->rx_dma_chan)
- dmaengine_slave_config(sirfport->rx_dma_chan, &slv_cfg);
- sirfport->tx_dma_chan = dma_request_slave_channel(port->dev, "tx");
- if (sirfport->tx_dma_chan)
- dmaengine_slave_config(sirfport->tx_dma_chan, &tx_slv_cfg);
- if (sirfport->rx_dma_chan) {
- hrtimer_init(&sirfport->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
- sirfport->hrt.function = sirfsoc_uart_rx_dma_hrtimer_callback;
- sirfport->is_hrt_enabled = false;
- }
-
- return 0;
-alloc_coherent_err:
- dma_free_coherent(port->dev, SIRFSOC_RX_DMA_BUF_SIZE,
- sirfport->rx_dma_items.xmit.buf,
- sirfport->rx_dma_items.dma_addr);
- dma_release_channel(sirfport->rx_dma_chan);
-err:
- return ret;
-}
-
-static int sirfsoc_uart_remove(struct platform_device *pdev)
-{
- struct sirfsoc_uart_port *sirfport = platform_get_drvdata(pdev);
- struct uart_port *port = &sirfport->port;
- uart_remove_one_port(&sirfsoc_uart_drv, port);
- if (sirfport->rx_dma_chan) {
- dmaengine_terminate_all(sirfport->rx_dma_chan);
- dma_release_channel(sirfport->rx_dma_chan);
- dma_free_coherent(port->dev, SIRFSOC_RX_DMA_BUF_SIZE,
- sirfport->rx_dma_items.xmit.buf,
- sirfport->rx_dma_items.dma_addr);
- }
- if (sirfport->tx_dma_chan) {
- dmaengine_terminate_all(sirfport->tx_dma_chan);
- dma_release_channel(sirfport->tx_dma_chan);
- }
- return 0;
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int
-sirfsoc_uart_suspend(struct device *pdev)
-{
- struct sirfsoc_uart_port *sirfport = dev_get_drvdata(pdev);
- struct uart_port *port = &sirfport->port;
- uart_suspend_port(&sirfsoc_uart_drv, port);
- return 0;
-}
-
-static int sirfsoc_uart_resume(struct device *pdev)
-{
- struct sirfsoc_uart_port *sirfport = dev_get_drvdata(pdev);
- struct uart_port *port = &sirfport->port;
- uart_resume_port(&sirfsoc_uart_drv, port);
- return 0;
-}
-#endif
-
-static const struct dev_pm_ops sirfsoc_uart_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(sirfsoc_uart_suspend, sirfsoc_uart_resume)
-};
-
-static struct platform_driver sirfsoc_uart_driver = {
- .probe = sirfsoc_uart_probe,
- .remove = sirfsoc_uart_remove,
- .driver = {
- .name = SIRFUART_PORT_NAME,
- .of_match_table = sirfsoc_uart_ids,
- .pm = &sirfsoc_uart_pm_ops,
- },
-};
-
-static int __init sirfsoc_uart_init(void)
-{
- int ret = 0;
-
- ret = uart_register_driver(&sirfsoc_uart_drv);
- if (ret)
- goto out;
-
- ret = platform_driver_register(&sirfsoc_uart_driver);
- if (ret)
- uart_unregister_driver(&sirfsoc_uart_drv);
-out:
- return ret;
-}
-module_init(sirfsoc_uart_init);
-
-static void __exit sirfsoc_uart_exit(void)
-{
- platform_driver_unregister(&sirfsoc_uart_driver);
- uart_unregister_driver(&sirfsoc_uart_drv);
-}
-module_exit(sirfsoc_uart_exit);
-
-MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR("Bin Shi <Bin.Shi@csr.com>, Rong Wang<Rong.Wang@csr.com>");
-MODULE_DESCRIPTION("CSR SiRFprimaII Uart Driver");
diff --git a/drivers/tty/serial/sirfsoc_uart.h b/drivers/tty/serial/sirfsoc_uart.h
deleted file mode 100644
index fb88ac565227..000000000000
--- a/drivers/tty/serial/sirfsoc_uart.h
+++ /dev/null
@@ -1,447 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0+ */
-/*
- * Drivers for CSR SiRFprimaII onboard UARTs.
- *
- * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
- */
-#include <linux/bitops.h>
-#include <linux/log2.h>
-#include <linux/hrtimer.h>
-struct sirfsoc_uart_param {
- const char *uart_name;
- const char *port_name;
-};
-
-struct sirfsoc_register {
- /* hardware uart specific */
- u32 sirfsoc_line_ctrl;
- u32 sirfsoc_divisor;
- /* uart - usp common */
- u32 sirfsoc_tx_rx_en;
- u32 sirfsoc_int_en_reg;
- u32 sirfsoc_int_st_reg;
- u32 sirfsoc_int_en_clr_reg;
- u32 sirfsoc_tx_dma_io_ctrl;
- u32 sirfsoc_tx_dma_io_len;
- u32 sirfsoc_tx_fifo_ctrl;
- u32 sirfsoc_tx_fifo_level_chk;
- u32 sirfsoc_tx_fifo_op;
- u32 sirfsoc_tx_fifo_status;
- u32 sirfsoc_tx_fifo_data;
- u32 sirfsoc_rx_dma_io_ctrl;
- u32 sirfsoc_rx_dma_io_len;
- u32 sirfsoc_rx_fifo_ctrl;
- u32 sirfsoc_rx_fifo_level_chk;
- u32 sirfsoc_rx_fifo_op;
- u32 sirfsoc_rx_fifo_status;
- u32 sirfsoc_rx_fifo_data;
- u32 sirfsoc_afc_ctrl;
- u32 sirfsoc_swh_dma_io;
- /* hardware usp specific */
- u32 sirfsoc_mode1;
- u32 sirfsoc_mode2;
- u32 sirfsoc_tx_frame_ctrl;
- u32 sirfsoc_rx_frame_ctrl;
- u32 sirfsoc_async_param_reg;
-};
-
-typedef u32 (*fifo_full_mask)(struct uart_port *port);
-typedef u32 (*fifo_empty_mask)(struct uart_port *port);
-
-struct sirfsoc_fifo_status {
- fifo_full_mask ff_full;
- fifo_empty_mask ff_empty;
-};
-
-struct sirfsoc_int_en {
- u32 sirfsoc_rx_done_en;
- u32 sirfsoc_tx_done_en;
- u32 sirfsoc_rx_oflow_en;
- u32 sirfsoc_tx_allout_en;
- u32 sirfsoc_rx_io_dma_en;
- u32 sirfsoc_tx_io_dma_en;
- u32 sirfsoc_rxfifo_full_en;
- u32 sirfsoc_txfifo_empty_en;
- u32 sirfsoc_rxfifo_thd_en;
- u32 sirfsoc_txfifo_thd_en;
- u32 sirfsoc_frm_err_en;
- u32 sirfsoc_rxd_brk_en;
- u32 sirfsoc_rx_timeout_en;
- u32 sirfsoc_parity_err_en;
- u32 sirfsoc_cts_en;
- u32 sirfsoc_rts_en;
-};
-
-struct sirfsoc_int_status {
- u32 sirfsoc_rx_done;
- u32 sirfsoc_tx_done;
- u32 sirfsoc_rx_oflow;
- u32 sirfsoc_tx_allout;
- u32 sirfsoc_rx_io_dma;
- u32 sirfsoc_tx_io_dma;
- u32 sirfsoc_rxfifo_full;
- u32 sirfsoc_txfifo_empty;
- u32 sirfsoc_rxfifo_thd;
- u32 sirfsoc_txfifo_thd;
- u32 sirfsoc_frm_err;
- u32 sirfsoc_rxd_brk;
- u32 sirfsoc_rx_timeout;
- u32 sirfsoc_parity_err;
- u32 sirfsoc_cts;
- u32 sirfsoc_rts;
-};
-
-enum sirfsoc_uart_type {
- SIRF_REAL_UART,
- SIRF_USP_UART,
-};
-
-struct sirfsoc_uart_register {
- struct sirfsoc_register uart_reg;
- struct sirfsoc_int_en uart_int_en;
- struct sirfsoc_int_status uart_int_st;
- struct sirfsoc_fifo_status fifo_status;
- struct sirfsoc_uart_param uart_param;
- enum sirfsoc_uart_type uart_type;
-};
-
-static u32 uart_usp_ff_full_mask(struct uart_port *port)
-{
- u32 full_bit;
-
- full_bit = ilog2(port->fifosize);
- return (1 << full_bit);
-}
-
-static u32 uart_usp_ff_empty_mask(struct uart_port *port)
-{
- u32 empty_bit;
-
- empty_bit = ilog2(port->fifosize) + 1;
- return (1 << empty_bit);
-}
-
-static struct sirfsoc_uart_register sirfsoc_usp = {
- .uart_reg = {
- .sirfsoc_mode1 = 0x0000,
- .sirfsoc_mode2 = 0x0004,
- .sirfsoc_tx_frame_ctrl = 0x0008,
- .sirfsoc_rx_frame_ctrl = 0x000c,
- .sirfsoc_tx_rx_en = 0x0010,
- .sirfsoc_int_en_reg = 0x0014,
- .sirfsoc_int_st_reg = 0x0018,
- .sirfsoc_async_param_reg = 0x0024,
- .sirfsoc_tx_dma_io_ctrl = 0x0100,
- .sirfsoc_tx_dma_io_len = 0x0104,
- .sirfsoc_tx_fifo_ctrl = 0x0108,
- .sirfsoc_tx_fifo_level_chk = 0x010c,
- .sirfsoc_tx_fifo_op = 0x0110,
- .sirfsoc_tx_fifo_status = 0x0114,
- .sirfsoc_tx_fifo_data = 0x0118,
- .sirfsoc_rx_dma_io_ctrl = 0x0120,
- .sirfsoc_rx_dma_io_len = 0x0124,
- .sirfsoc_rx_fifo_ctrl = 0x0128,
- .sirfsoc_rx_fifo_level_chk = 0x012c,
- .sirfsoc_rx_fifo_op = 0x0130,
- .sirfsoc_rx_fifo_status = 0x0134,
- .sirfsoc_rx_fifo_data = 0x0138,
- .sirfsoc_int_en_clr_reg = 0x140,
- },
- .uart_int_en = {
- .sirfsoc_rx_done_en = BIT(0),
- .sirfsoc_tx_done_en = BIT(1),
- .sirfsoc_rx_oflow_en = BIT(2),
- .sirfsoc_tx_allout_en = BIT(3),
- .sirfsoc_rx_io_dma_en = BIT(4),
- .sirfsoc_tx_io_dma_en = BIT(5),
- .sirfsoc_rxfifo_full_en = BIT(6),
- .sirfsoc_txfifo_empty_en = BIT(7),
- .sirfsoc_rxfifo_thd_en = BIT(8),
- .sirfsoc_txfifo_thd_en = BIT(9),
- .sirfsoc_frm_err_en = BIT(10),
- .sirfsoc_rx_timeout_en = BIT(11),
- .sirfsoc_rxd_brk_en = BIT(15),
- },
- .uart_int_st = {
- .sirfsoc_rx_done = BIT(0),
- .sirfsoc_tx_done = BIT(1),
- .sirfsoc_rx_oflow = BIT(2),
- .sirfsoc_tx_allout = BIT(3),
- .sirfsoc_rx_io_dma = BIT(4),
- .sirfsoc_tx_io_dma = BIT(5),
- .sirfsoc_rxfifo_full = BIT(6),
- .sirfsoc_txfifo_empty = BIT(7),
- .sirfsoc_rxfifo_thd = BIT(8),
- .sirfsoc_txfifo_thd = BIT(9),
- .sirfsoc_frm_err = BIT(10),
- .sirfsoc_rx_timeout = BIT(11),
- .sirfsoc_rxd_brk = BIT(15),
- },
- .fifo_status = {
- .ff_full = uart_usp_ff_full_mask,
- .ff_empty = uart_usp_ff_empty_mask,
- },
- .uart_param = {
- .uart_name = "ttySiRF",
- .port_name = "sirfsoc-uart",
- },
-};
-
-static struct sirfsoc_uart_register sirfsoc_uart = {
- .uart_reg = {
- .sirfsoc_line_ctrl = 0x0040,
- .sirfsoc_tx_rx_en = 0x004c,
- .sirfsoc_divisor = 0x0050,
- .sirfsoc_int_en_reg = 0x0054,
- .sirfsoc_int_st_reg = 0x0058,
- .sirfsoc_int_en_clr_reg = 0x0060,
- .sirfsoc_tx_dma_io_ctrl = 0x0100,
- .sirfsoc_tx_dma_io_len = 0x0104,
- .sirfsoc_tx_fifo_ctrl = 0x0108,
- .sirfsoc_tx_fifo_level_chk = 0x010c,
- .sirfsoc_tx_fifo_op = 0x0110,
- .sirfsoc_tx_fifo_status = 0x0114,
- .sirfsoc_tx_fifo_data = 0x0118,
- .sirfsoc_rx_dma_io_ctrl = 0x0120,
- .sirfsoc_rx_dma_io_len = 0x0124,
- .sirfsoc_rx_fifo_ctrl = 0x0128,
- .sirfsoc_rx_fifo_level_chk = 0x012c,
- .sirfsoc_rx_fifo_op = 0x0130,
- .sirfsoc_rx_fifo_status = 0x0134,
- .sirfsoc_rx_fifo_data = 0x0138,
- .sirfsoc_afc_ctrl = 0x0140,
- .sirfsoc_swh_dma_io = 0x0148,
- },
- .uart_int_en = {
- .sirfsoc_rx_done_en = BIT(0),
- .sirfsoc_tx_done_en = BIT(1),
- .sirfsoc_rx_oflow_en = BIT(2),
- .sirfsoc_tx_allout_en = BIT(3),
- .sirfsoc_rx_io_dma_en = BIT(4),
- .sirfsoc_tx_io_dma_en = BIT(5),
- .sirfsoc_rxfifo_full_en = BIT(6),
- .sirfsoc_txfifo_empty_en = BIT(7),
- .sirfsoc_rxfifo_thd_en = BIT(8),
- .sirfsoc_txfifo_thd_en = BIT(9),
- .sirfsoc_frm_err_en = BIT(10),
- .sirfsoc_rxd_brk_en = BIT(11),
- .sirfsoc_rx_timeout_en = BIT(12),
- .sirfsoc_parity_err_en = BIT(13),
- .sirfsoc_cts_en = BIT(14),
- .sirfsoc_rts_en = BIT(15),
- },
- .uart_int_st = {
- .sirfsoc_rx_done = BIT(0),
- .sirfsoc_tx_done = BIT(1),
- .sirfsoc_rx_oflow = BIT(2),
- .sirfsoc_tx_allout = BIT(3),
- .sirfsoc_rx_io_dma = BIT(4),
- .sirfsoc_tx_io_dma = BIT(5),
- .sirfsoc_rxfifo_full = BIT(6),
- .sirfsoc_txfifo_empty = BIT(7),
- .sirfsoc_rxfifo_thd = BIT(8),
- .sirfsoc_txfifo_thd = BIT(9),
- .sirfsoc_frm_err = BIT(10),
- .sirfsoc_rxd_brk = BIT(11),
- .sirfsoc_rx_timeout = BIT(12),
- .sirfsoc_parity_err = BIT(13),
- .sirfsoc_cts = BIT(14),
- .sirfsoc_rts = BIT(15),
- },
- .fifo_status = {
- .ff_full = uart_usp_ff_full_mask,
- .ff_empty = uart_usp_ff_empty_mask,
- },
- .uart_param = {
- .uart_name = "ttySiRF",
- .port_name = "sirfsoc_uart",
- },
-};
-/* uart io ctrl */
-#define SIRFUART_DATA_BIT_LEN_MASK 0x3
-#define SIRFUART_DATA_BIT_LEN_5 BIT(0)
-#define SIRFUART_DATA_BIT_LEN_6 1
-#define SIRFUART_DATA_BIT_LEN_7 2
-#define SIRFUART_DATA_BIT_LEN_8 3
-#define SIRFUART_STOP_BIT_LEN_1 0
-#define SIRFUART_STOP_BIT_LEN_2 BIT(2)
-#define SIRFUART_PARITY_EN BIT(3)
-#define SIRFUART_EVEN_BIT BIT(4)
-#define SIRFUART_STICK_BIT_MASK (7 << 3)
-#define SIRFUART_STICK_BIT_NONE (0 << 3)
-#define SIRFUART_STICK_BIT_EVEN BIT(3)
-#define SIRFUART_STICK_BIT_ODD (3 << 3)
-#define SIRFUART_STICK_BIT_MARK (5 << 3)
-#define SIRFUART_STICK_BIT_SPACE (7 << 3)
-#define SIRFUART_SET_BREAK BIT(6)
-#define SIRFUART_LOOP_BACK BIT(7)
-#define SIRFUART_PARITY_MASK (7 << 3)
-#define SIRFUART_DUMMY_READ BIT(16)
-#define SIRFUART_AFC_CTRL_RX_THD 0x70
-#define SIRFUART_AFC_RX_EN BIT(8)
-#define SIRFUART_AFC_TX_EN BIT(9)
-#define SIRFUART_AFC_CTS_CTRL BIT(10)
-#define SIRFUART_AFC_RTS_CTRL BIT(11)
-#define SIRFUART_AFC_CTS_STATUS BIT(12)
-#define SIRFUART_AFC_RTS_STATUS BIT(13)
-/* UART FIFO Register */
-#define SIRFUART_FIFO_STOP 0x0
-#define SIRFUART_FIFO_RESET BIT(0)
-#define SIRFUART_FIFO_START BIT(1)
-
-#define SIRFUART_RX_EN BIT(0)
-#define SIRFUART_TX_EN BIT(1)
-
-#define SIRFUART_IO_MODE BIT(0)
-#define SIRFUART_DMA_MODE 0x0
-#define SIRFUART_RX_DMA_FLUSH 0x4
-
-#define SIRFUART_CLEAR_RX_ADDR_EN 0x2
-/* Baud Rate Calculation */
-#define SIRF_USP_MIN_SAMPLE_DIV 0x1
-#define SIRF_MIN_SAMPLE_DIV 0xf
-#define SIRF_MAX_SAMPLE_DIV 0x3f
-#define SIRF_IOCLK_DIV_MAX 0xffff
-#define SIRF_SAMPLE_DIV_SHIFT 16
-#define SIRF_IOCLK_DIV_MASK 0xffff
-#define SIRF_SAMPLE_DIV_MASK 0x3f0000
-#define SIRF_BAUD_RATE_SUPPORT_NR 18
-
-/* USP SPEC */
-#define SIRFSOC_USP_ENDIAN_CTRL_LSBF BIT(4)
-#define SIRFSOC_USP_EN BIT(5)
-#define SIRFSOC_USP_MODE2_RXD_DELAY_OFFSET 0
-#define SIRFSOC_USP_MODE2_TXD_DELAY_OFFSET 8
-#define SIRFSOC_USP_MODE2_CLK_DIVISOR_MASK 0x3ff
-#define SIRFSOC_USP_MODE2_CLK_DIVISOR_OFFSET 21
-#define SIRFSOC_USP_TX_DATA_LEN_OFFSET 0
-#define SIRFSOC_USP_TX_SYNC_LEN_OFFSET 8
-#define SIRFSOC_USP_TX_FRAME_LEN_OFFSET 16
-#define SIRFSOC_USP_TX_SHIFTER_LEN_OFFSET 24
-#define SIRFSOC_USP_TX_CLK_DIVISOR_OFFSET 30
-#define SIRFSOC_USP_RX_DATA_LEN_OFFSET 0
-#define SIRFSOC_USP_RX_FRAME_LEN_OFFSET 8
-#define SIRFSOC_USP_RX_SHIFTER_LEN_OFFSET 16
-#define SIRFSOC_USP_RX_CLK_DIVISOR_OFFSET 24
-#define SIRFSOC_USP_ASYNC_DIV2_MASK 0x3f
-#define SIRFSOC_USP_ASYNC_DIV2_OFFSET 16
-#define SIRFSOC_USP_LOOP_BACK_CTRL BIT(2)
-#define SIRFSOC_USP_FRADDR_CLR_EN BIT(1)
-/* USP-UART Common */
-#define SIRFSOC_UART_RX_TIMEOUT(br, to) (((br) * (((to) + 999) / 1000)) / 1000)
-#define SIRFUART_RECV_TIMEOUT_VALUE(x) \
- (((x) > 0xFFFF) ? 0xFFFF : ((x) & 0xFFFF))
-#define SIRFUART_USP_RECV_TIMEOUT(x) (x & 0xFFFF)
-#define SIRFUART_UART_RECV_TIMEOUT(x) ((x & 0xFFFF) << 16)
-
-#define SIRFUART_FIFO_THD(port) (port->fifosize >> 1)
-#define SIRFUART_ERR_INT_STAT(unit_st, uart_type) \
- (uint_st->sirfsoc_rx_oflow | \
- uint_st->sirfsoc_frm_err | \
- uint_st->sirfsoc_rxd_brk | \
- ((uart_type != SIRF_REAL_UART) ? \
- 0 : uint_st->sirfsoc_parity_err))
-#define SIRFUART_RX_IO_INT_EN(uint_en, uart_type) \
- (uint_en->sirfsoc_rx_done_en |\
- uint_en->sirfsoc_rxfifo_thd_en |\
- uint_en->sirfsoc_rxfifo_full_en |\
- uint_en->sirfsoc_frm_err_en |\
- uint_en->sirfsoc_rx_oflow_en |\
- uint_en->sirfsoc_rxd_brk_en |\
- ((uart_type != SIRF_REAL_UART) ? \
- 0 : uint_en->sirfsoc_parity_err_en))
-#define SIRFUART_RX_IO_INT_ST(uint_st) \
- (uint_st->sirfsoc_rxfifo_thd |\
- uint_st->sirfsoc_rxfifo_full|\
- uint_st->sirfsoc_rx_done |\
- uint_st->sirfsoc_rx_timeout)
-#define SIRFUART_CTS_INT_ST(uint_st) (uint_st->sirfsoc_cts)
-#define SIRFUART_RX_DMA_INT_EN(uint_en, uart_type) \
- (uint_en->sirfsoc_frm_err_en |\
- uint_en->sirfsoc_rx_oflow_en |\
- uint_en->sirfsoc_rxd_brk_en |\
- ((uart_type != SIRF_REAL_UART) ? \
- 0 : uint_en->sirfsoc_parity_err_en))
-/* Generic Definitions */
-#define SIRFSOC_UART_NAME "ttySiRF"
-#define SIRFSOC_UART_MAJOR 0
-#define SIRFSOC_UART_MINOR 0
-#define SIRFUART_PORT_NAME "sirfsoc-uart"
-#define SIRFUART_MAP_SIZE 0x200
-#define SIRFSOC_UART_NR 11
-#define SIRFSOC_PORT_TYPE 0xa5
-
-/* Uart Common Use Macro*/
-#define SIRFSOC_RX_DMA_BUF_SIZE (1024 * 32)
-#define BYTES_TO_ALIGN(dma_addr) ((unsigned long)(dma_addr) & 0x3)
-/* Uart Fifo Level Chk */
-#define SIRFUART_TX_FIFO_SC_OFFSET 0
-#define SIRFUART_TX_FIFO_LC_OFFSET 10
-#define SIRFUART_TX_FIFO_HC_OFFSET 20
-#define SIRFUART_TX_FIFO_CHK_SC(line, value) ((((line) == 1) ? (value & 0x3) :\
- (value & 0x1f)) << SIRFUART_TX_FIFO_SC_OFFSET)
-#define SIRFUART_TX_FIFO_CHK_LC(line, value) ((((line) == 1) ? (value & 0x3) :\
- (value & 0x1f)) << SIRFUART_TX_FIFO_LC_OFFSET)
-#define SIRFUART_TX_FIFO_CHK_HC(line, value) ((((line) == 1) ? (value & 0x3) :\
- (value & 0x1f)) << SIRFUART_TX_FIFO_HC_OFFSET)
-
-#define SIRFUART_RX_FIFO_CHK_SC SIRFUART_TX_FIFO_CHK_SC
-#define SIRFUART_RX_FIFO_CHK_LC SIRFUART_TX_FIFO_CHK_LC
-#define SIRFUART_RX_FIFO_CHK_HC SIRFUART_TX_FIFO_CHK_HC
-#define SIRFUART_RX_FIFO_MASK 0x7f
-/* Indicate how many buffers used */
-
-/* For Fast Baud Rate Calculation */
-struct sirfsoc_baudrate_to_regv {
- unsigned int baud_rate;
- unsigned int reg_val;
-};
-
-enum sirfsoc_tx_state {
- TX_DMA_IDLE,
- TX_DMA_RUNNING,
- TX_DMA_PAUSE,
-};
-
-struct sirfsoc_rx_buffer {
- struct circ_buf xmit;
- dma_cookie_t cookie;
- struct dma_async_tx_descriptor *desc;
- dma_addr_t dma_addr;
-};
-
-struct sirfsoc_uart_port {
- bool hw_flow_ctrl;
- bool ms_enabled;
-
- struct uart_port port;
- struct clk *clk;
- /* for SiRFatlas7, there are SET/CLR for UART_INT_EN */
- bool is_atlas7;
- struct sirfsoc_uart_register *uart_reg;
- struct dma_chan *rx_dma_chan;
- struct dma_chan *tx_dma_chan;
- dma_addr_t tx_dma_addr;
- struct dma_async_tx_descriptor *tx_dma_desc;
- unsigned long transfer_size;
- enum sirfsoc_tx_state tx_dma_state;
- unsigned int cts_gpio;
- unsigned int rts_gpio;
-
- struct sirfsoc_rx_buffer rx_dma_items;
- struct hrtimer hrt;
- bool is_hrt_enabled;
- unsigned long rx_period_time;
- unsigned long rx_last_pos;
- unsigned long pio_fetch_cnt;
-};
-
-/* Register Access Control */
-#define portaddr(port, reg) ((port)->membase + (reg))
-#define rd_regl(port, reg) (__raw_readl(portaddr(port, reg)))
-#define wr_regl(port, reg, val) __raw_writel(val, portaddr(port, reg))
-
-/* UART Port Mask */
-#define SIRFUART_FIFOLEVEL_MASK(port) ((port->fifosize - 1) & 0xFFF)
-#define SIRFUART_FIFOFULL_MASK(port) (port->fifosize & 0xFFF)
-#define SIRFUART_FIFOEMPTY_MASK(port) ((port->fifosize & 0xFFF) << 1)
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c
index f4de32d3f2af..dde6d526362d 100644
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c
@@ -3,7 +3,8 @@
* Copyright (C) Maxime Coquelin 2015
* Copyright (C) STMicroelectronics SA 2017
* Authors: Maxime Coquelin <mcoquelin.stm32@gmail.com>
- * Gerald Baeza <gerald.baeza@st.com>
+ * Gerald Baeza <gerald.baeza@foss.st.com>
+ * Erwan Le Ray <erwan.leray@foss.st.com>
*
* Inspired by st-asc.c from STMicroelectronics (c)
*/
@@ -34,15 +35,15 @@
#include "serial_mctrl_gpio.h"
#include "stm32-usart.h"
-static void stm32_stop_tx(struct uart_port *port);
-static void stm32_transmit_chars(struct uart_port *port);
+static void stm32_usart_stop_tx(struct uart_port *port);
+static void stm32_usart_transmit_chars(struct uart_port *port);
static inline struct stm32_port *to_stm32_port(struct uart_port *port)
{
return container_of(port, struct stm32_port, port);
}
-static void stm32_set_bits(struct uart_port *port, u32 reg, u32 bits)
+static void stm32_usart_set_bits(struct uart_port *port, u32 reg, u32 bits)
{
u32 val;
@@ -51,7 +52,7 @@ static void stm32_set_bits(struct uart_port *port, u32 reg, u32 bits)
writel_relaxed(val, port->membase + reg);
}
-static void stm32_clr_bits(struct uart_port *port, u32 reg, u32 bits)
+static void stm32_usart_clr_bits(struct uart_port *port, u32 reg, u32 bits)
{
u32 val;
@@ -60,8 +61,8 @@ static void stm32_clr_bits(struct uart_port *port, u32 reg, u32 bits)
writel_relaxed(val, port->membase + reg);
}
-static void stm32_config_reg_rs485(u32 *cr1, u32 *cr3, u32 delay_ADE,
- u32 delay_DDE, u32 baud)
+static void stm32_usart_config_reg_rs485(u32 *cr1, u32 *cr3, u32 delay_ADE,
+ u32 delay_DDE, u32 baud)
{
u32 rs485_deat_dedt;
u32 rs485_deat_dedt_max = (USART_CR1_DEAT_MASK >> USART_CR1_DEAT_SHIFT);
@@ -95,8 +96,8 @@ static void stm32_config_reg_rs485(u32 *cr1, u32 *cr3, u32 delay_ADE,
*cr1 |= rs485_deat_dedt;
}
-static int stm32_config_rs485(struct uart_port *port,
- struct serial_rs485 *rs485conf)
+static int stm32_usart_config_rs485(struct uart_port *port,
+ struct serial_rs485 *rs485conf)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
@@ -104,7 +105,7 @@ static int stm32_config_rs485(struct uart_port *port,
u32 usartdiv, baud, cr1, cr3;
bool over8;
- stm32_clr_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
+ stm32_usart_clr_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
port->rs485 = *rs485conf;
@@ -122,9 +123,10 @@ static int stm32_config_rs485(struct uart_port *port,
<< USART_BRR_04_R_SHIFT;
baud = DIV_ROUND_CLOSEST(port->uartclk, usartdiv);
- stm32_config_reg_rs485(&cr1, &cr3,
- rs485conf->delay_rts_before_send,
- rs485conf->delay_rts_after_send, baud);
+ stm32_usart_config_reg_rs485(&cr1, &cr3,
+ rs485conf->delay_rts_before_send,
+ rs485conf->delay_rts_after_send,
+ baud);
if (rs485conf->flags & SER_RS485_RTS_ON_SEND) {
cr3 &= ~USART_CR3_DEP;
@@ -137,18 +139,19 @@ static int stm32_config_rs485(struct uart_port *port,
writel_relaxed(cr3, port->membase + ofs->cr3);
writel_relaxed(cr1, port->membase + ofs->cr1);
} else {
- stm32_clr_bits(port, ofs->cr3, USART_CR3_DEM | USART_CR3_DEP);
- stm32_clr_bits(port, ofs->cr1,
- USART_CR1_DEDT_MASK | USART_CR1_DEAT_MASK);
+ stm32_usart_clr_bits(port, ofs->cr3,
+ USART_CR3_DEM | USART_CR3_DEP);
+ stm32_usart_clr_bits(port, ofs->cr1,
+ USART_CR1_DEDT_MASK | USART_CR1_DEAT_MASK);
}
- stm32_set_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
+ stm32_usart_set_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
return 0;
}
-static int stm32_init_rs485(struct uart_port *port,
- struct platform_device *pdev)
+static int stm32_usart_init_rs485(struct uart_port *port,
+ struct platform_device *pdev)
{
struct serial_rs485 *rs485conf = &port->rs485;
@@ -162,8 +165,8 @@ static int stm32_init_rs485(struct uart_port *port,
return uart_get_rs485_mode(port);
}
-static int stm32_pending_rx(struct uart_port *port, u32 *sr, int *last_res,
- bool threaded)
+static int stm32_usart_pending_rx(struct uart_port *port, u32 *sr,
+ int *last_res, bool threaded)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
@@ -176,8 +179,7 @@ static int stm32_pending_rx(struct uart_port *port, u32 *sr, int *last_res,
status = dmaengine_tx_status(stm32_port->rx_ch,
stm32_port->rx_ch->cookie,
&state);
- if ((status == DMA_IN_PROGRESS) &&
- (*last_res != state.residue))
+ if (status == DMA_IN_PROGRESS && (*last_res != state.residue))
return 1;
else
return 0;
@@ -187,8 +189,8 @@ static int stm32_pending_rx(struct uart_port *port, u32 *sr, int *last_res,
return 0;
}
-static unsigned long stm32_get_char(struct uart_port *port, u32 *sr,
- int *last_res)
+static unsigned long stm32_usart_get_char(struct uart_port *port, u32 *sr,
+ int *last_res)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
@@ -207,7 +209,7 @@ static unsigned long stm32_get_char(struct uart_port *port, u32 *sr,
return c;
}
-static void stm32_receive_chars(struct uart_port *port, bool threaded)
+static void stm32_usart_receive_chars(struct uart_port *port, bool threaded)
{
struct tty_port *tport = &port->state->port;
struct stm32_port *stm32_port = to_stm32_port(port);
@@ -219,7 +221,8 @@ static void stm32_receive_chars(struct uart_port *port, bool threaded)
if (irqd_is_wakeup_set(irq_get_irq_data(port->irq)))
pm_wakeup_event(tport->tty->dev, 0);
- while (stm32_pending_rx(port, &sr, &stm32_port->last_res, threaded)) {
+ while (stm32_usart_pending_rx(port, &sr, &stm32_port->last_res,
+ threaded)) {
sr |= USART_SR_DUMMY_RX;
flag = TTY_NORMAL;
@@ -238,7 +241,7 @@ static void stm32_receive_chars(struct uart_port *port, bool threaded)
writel_relaxed(sr & USART_SR_ERR_MASK,
port->membase + ofs->icr);
- c = stm32_get_char(port, &sr, &stm32_port->last_res);
+ c = stm32_usart_get_char(port, &sr, &stm32_port->last_res);
port->icount.rx++;
if (sr & USART_SR_ERR_MASK) {
if (sr & USART_SR_ORE) {
@@ -278,20 +281,20 @@ static void stm32_receive_chars(struct uart_port *port, bool threaded)
spin_lock(&port->lock);
}
-static void stm32_tx_dma_complete(void *arg)
+static void stm32_usart_tx_dma_complete(void *arg)
{
struct uart_port *port = arg;
struct stm32_port *stm32port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32port->info->ofs;
- stm32_clr_bits(port, ofs->cr3, USART_CR3_DMAT);
+ stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_DMAT);
stm32port->tx_dma_busy = false;
/* Let's see if we have pending data to send */
- stm32_transmit_chars(port);
+ stm32_usart_transmit_chars(port);
}
-static void stm32_tx_interrupt_enable(struct uart_port *port)
+static void stm32_usart_tx_interrupt_enable(struct uart_port *port)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
@@ -301,30 +304,30 @@ static void stm32_tx_interrupt_enable(struct uart_port *port)
* or TX empty irq when FIFO is disabled
*/
if (stm32_port->fifoen)
- stm32_set_bits(port, ofs->cr3, USART_CR3_TXFTIE);
+ stm32_usart_set_bits(port, ofs->cr3, USART_CR3_TXFTIE);
else
- stm32_set_bits(port, ofs->cr1, USART_CR1_TXEIE);
+ stm32_usart_set_bits(port, ofs->cr1, USART_CR1_TXEIE);
}
-static void stm32_tx_interrupt_disable(struct uart_port *port)
+static void stm32_usart_tx_interrupt_disable(struct uart_port *port)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
if (stm32_port->fifoen)
- stm32_clr_bits(port, ofs->cr3, USART_CR3_TXFTIE);
+ stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_TXFTIE);
else
- stm32_clr_bits(port, ofs->cr1, USART_CR1_TXEIE);
+ stm32_usart_clr_bits(port, ofs->cr1, USART_CR1_TXEIE);
}
-static void stm32_transmit_chars_pio(struct uart_port *port)
+static void stm32_usart_transmit_chars_pio(struct uart_port *port)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
struct circ_buf *xmit = &port->state->xmit;
if (stm32_port->tx_dma_busy) {
- stm32_clr_bits(port, ofs->cr3, USART_CR3_DMAT);
+ stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_DMAT);
stm32_port->tx_dma_busy = false;
}
@@ -339,12 +342,12 @@ static void stm32_transmit_chars_pio(struct uart_port *port)
/* rely on TXE irq (mask or unmask) for sending remaining data */
if (uart_circ_empty(xmit))
- stm32_tx_interrupt_disable(port);
+ stm32_usart_tx_interrupt_disable(port);
else
- stm32_tx_interrupt_enable(port);
+ stm32_usart_tx_interrupt_enable(port);
}
-static void stm32_transmit_chars_dma(struct uart_port *port)
+static void stm32_usart_transmit_chars_dma(struct uart_port *port)
{
struct stm32_port *stm32port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32port->info->ofs;
@@ -383,28 +386,34 @@ static void stm32_transmit_chars_dma(struct uart_port *port)
DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT);
- if (!desc) {
- for (i = count; i > 0; i--)
- stm32_transmit_chars_pio(port);
- return;
- }
+ if (!desc)
+ goto fallback_err;
- desc->callback = stm32_tx_dma_complete;
+ desc->callback = stm32_usart_tx_dma_complete;
desc->callback_param = port;
/* Push current DMA TX transaction in the pending queue */
- dmaengine_submit(desc);
+ if (dma_submit_error(dmaengine_submit(desc))) {
+ /* dma no yet started, safe to free resources */
+ dmaengine_terminate_async(stm32port->tx_ch);
+ goto fallback_err;
+ }
/* Issue pending DMA TX requests */
dma_async_issue_pending(stm32port->tx_ch);
- stm32_set_bits(port, ofs->cr3, USART_CR3_DMAT);
+ stm32_usart_set_bits(port, ofs->cr3, USART_CR3_DMAT);
xmit->tail = (xmit->tail + count) & (UART_XMIT_SIZE - 1);
port->icount.tx += count;
+ return;
+
+fallback_err:
+ for (i = count; i > 0; i--)
+ stm32_usart_transmit_chars_pio(port);
}
-static void stm32_transmit_chars(struct uart_port *port)
+static void stm32_usart_transmit_chars(struct uart_port *port)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
@@ -412,38 +421,38 @@ static void stm32_transmit_chars(struct uart_port *port)
if (port->x_char) {
if (stm32_port->tx_dma_busy)
- stm32_clr_bits(port, ofs->cr3, USART_CR3_DMAT);
+ stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_DMAT);
writel_relaxed(port->x_char, port->membase + ofs->tdr);
port->x_char = 0;
port->icount.tx++;
if (stm32_port->tx_dma_busy)
- stm32_set_bits(port, ofs->cr3, USART_CR3_DMAT);
+ stm32_usart_set_bits(port, ofs->cr3, USART_CR3_DMAT);
return;
}
if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
- stm32_tx_interrupt_disable(port);
+ stm32_usart_tx_interrupt_disable(port);
return;
}
if (ofs->icr == UNDEF_REG)
- stm32_clr_bits(port, ofs->isr, USART_SR_TC);
+ stm32_usart_clr_bits(port, ofs->isr, USART_SR_TC);
else
writel_relaxed(USART_ICR_TCCF, port->membase + ofs->icr);
if (stm32_port->tx_ch)
- stm32_transmit_chars_dma(port);
+ stm32_usart_transmit_chars_dma(port);
else
- stm32_transmit_chars_pio(port);
+ stm32_usart_transmit_chars_pio(port);
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(port);
if (uart_circ_empty(xmit))
- stm32_tx_interrupt_disable(port);
+ stm32_usart_tx_interrupt_disable(port);
}
-static irqreturn_t stm32_interrupt(int irq, void *ptr)
+static irqreturn_t stm32_usart_interrupt(int irq, void *ptr)
{
struct uart_port *port = ptr;
struct stm32_port *stm32_port = to_stm32_port(port);
@@ -458,15 +467,15 @@ static irqreturn_t stm32_interrupt(int irq, void *ptr)
writel_relaxed(USART_ICR_RTOCF,
port->membase + ofs->icr);
- if ((sr & USART_SR_WUF) && (ofs->icr != UNDEF_REG))
+ if ((sr & USART_SR_WUF) && ofs->icr != UNDEF_REG)
writel_relaxed(USART_ICR_WUCF,
port->membase + ofs->icr);
if ((sr & USART_SR_RXNE) && !(stm32_port->rx_ch))
- stm32_receive_chars(port, false);
+ stm32_usart_receive_chars(port, false);
if ((sr & USART_SR_TXE) && !(stm32_port->tx_ch))
- stm32_transmit_chars(port);
+ stm32_usart_transmit_chars(port);
spin_unlock(&port->lock);
@@ -476,7 +485,7 @@ static irqreturn_t stm32_interrupt(int irq, void *ptr)
return IRQ_HANDLED;
}
-static irqreturn_t stm32_threaded_interrupt(int irq, void *ptr)
+static irqreturn_t stm32_usart_threaded_interrupt(int irq, void *ptr)
{
struct uart_port *port = ptr;
struct stm32_port *stm32_port = to_stm32_port(port);
@@ -484,14 +493,14 @@ static irqreturn_t stm32_threaded_interrupt(int irq, void *ptr)
spin_lock(&port->lock);
if (stm32_port->rx_ch)
- stm32_receive_chars(port, true);
+ stm32_usart_receive_chars(port, true);
spin_unlock(&port->lock);
return IRQ_HANDLED;
}
-static unsigned int stm32_tx_empty(struct uart_port *port)
+static unsigned int stm32_usart_tx_empty(struct uart_port *port)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
@@ -499,20 +508,20 @@ static unsigned int stm32_tx_empty(struct uart_port *port)
return readl_relaxed(port->membase + ofs->isr) & USART_SR_TXE;
}
-static void stm32_set_mctrl(struct uart_port *port, unsigned int mctrl)
+static void stm32_usart_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
if ((mctrl & TIOCM_RTS) && (port->status & UPSTAT_AUTORTS))
- stm32_set_bits(port, ofs->cr3, USART_CR3_RTSE);
+ stm32_usart_set_bits(port, ofs->cr3, USART_CR3_RTSE);
else
- stm32_clr_bits(port, ofs->cr3, USART_CR3_RTSE);
+ stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_RTSE);
mctrl_gpio_set(stm32_port->gpios, mctrl);
}
-static unsigned int stm32_get_mctrl(struct uart_port *port)
+static unsigned int stm32_usart_get_mctrl(struct uart_port *port)
{
struct stm32_port *stm32_port = to_stm32_port(port);
unsigned int ret;
@@ -523,23 +532,23 @@ static unsigned int stm32_get_mctrl(struct uart_port *port)
return mctrl_gpio_get(stm32_port->gpios, &ret);
}
-static void stm32_enable_ms(struct uart_port *port)
+static void stm32_usart_enable_ms(struct uart_port *port)
{
mctrl_gpio_enable_ms(to_stm32_port(port)->gpios);
}
-static void stm32_disable_ms(struct uart_port *port)
+static void stm32_usart_disable_ms(struct uart_port *port)
{
mctrl_gpio_disable_ms(to_stm32_port(port)->gpios);
}
/* Transmit stop */
-static void stm32_stop_tx(struct uart_port *port)
+static void stm32_usart_stop_tx(struct uart_port *port)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct serial_rs485 *rs485conf = &port->rs485;
- stm32_tx_interrupt_disable(port);
+ stm32_usart_tx_interrupt_disable(port);
if (rs485conf->flags & SER_RS485_ENABLED) {
if (rs485conf->flags & SER_RS485_RTS_ON_SEND) {
@@ -553,7 +562,7 @@ static void stm32_stop_tx(struct uart_port *port)
}
/* There are probably characters waiting to be transmitted. */
-static void stm32_start_tx(struct uart_port *port)
+static void stm32_usart_start_tx(struct uart_port *port)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct serial_rs485 *rs485conf = &port->rs485;
@@ -572,57 +581,56 @@ static void stm32_start_tx(struct uart_port *port)
}
}
- stm32_transmit_chars(port);
+ stm32_usart_transmit_chars(port);
}
/* Throttle the remote when input buffer is about to overflow. */
-static void stm32_throttle(struct uart_port *port)
+static void stm32_usart_throttle(struct uart_port *port)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
unsigned long flags;
spin_lock_irqsave(&port->lock, flags);
- stm32_clr_bits(port, ofs->cr1, stm32_port->cr1_irq);
+ stm32_usart_clr_bits(port, ofs->cr1, stm32_port->cr1_irq);
if (stm32_port->cr3_irq)
- stm32_clr_bits(port, ofs->cr3, stm32_port->cr3_irq);
+ stm32_usart_clr_bits(port, ofs->cr3, stm32_port->cr3_irq);
spin_unlock_irqrestore(&port->lock, flags);
}
/* Unthrottle the remote, the input buffer can now accept data. */
-static void stm32_unthrottle(struct uart_port *port)
+static void stm32_usart_unthrottle(struct uart_port *port)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
unsigned long flags;
spin_lock_irqsave(&port->lock, flags);
- stm32_set_bits(port, ofs->cr1, stm32_port->cr1_irq);
+ stm32_usart_set_bits(port, ofs->cr1, stm32_port->cr1_irq);
if (stm32_port->cr3_irq)
- stm32_set_bits(port, ofs->cr3, stm32_port->cr3_irq);
+ stm32_usart_set_bits(port, ofs->cr3, stm32_port->cr3_irq);
spin_unlock_irqrestore(&port->lock, flags);
}
/* Receive stop */
-static void stm32_stop_rx(struct uart_port *port)
+static void stm32_usart_stop_rx(struct uart_port *port)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
- stm32_clr_bits(port, ofs->cr1, stm32_port->cr1_irq);
+ stm32_usart_clr_bits(port, ofs->cr1, stm32_port->cr1_irq);
if (stm32_port->cr3_irq)
- stm32_clr_bits(port, ofs->cr3, stm32_port->cr3_irq);
-
+ stm32_usart_clr_bits(port, ofs->cr3, stm32_port->cr3_irq);
}
/* Handle breaks - ignored by us */
-static void stm32_break_ctl(struct uart_port *port, int break_state)
+static void stm32_usart_break_ctl(struct uart_port *port, int break_state)
{
}
-static int stm32_startup(struct uart_port *port)
+static int stm32_usart_startup(struct uart_port *port)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
@@ -630,15 +638,15 @@ static int stm32_startup(struct uart_port *port)
u32 val;
int ret;
- ret = request_threaded_irq(port->irq, stm32_interrupt,
- stm32_threaded_interrupt,
+ ret = request_threaded_irq(port->irq, stm32_usart_interrupt,
+ stm32_usart_threaded_interrupt,
IRQF_NO_SUSPEND, name, port);
if (ret)
return ret;
/* RX FIFO Flush */
if (ofs->rqr != UNDEF_REG)
- stm32_set_bits(port, ofs->rqr, USART_RQR_RXFRQ);
+ stm32_usart_set_bits(port, ofs->rqr, USART_RQR_RXFRQ);
/* Tx and RX FIFO configuration */
if (stm32_port->fifoen) {
@@ -653,12 +661,12 @@ static int stm32_startup(struct uart_port *port)
val = stm32_port->cr1_irq | USART_CR1_RE;
if (stm32_port->fifoen)
val |= USART_CR1_FIFOEN;
- stm32_set_bits(port, ofs->cr1, val);
+ stm32_usart_set_bits(port, ofs->cr1, val);
return 0;
}
-static void stm32_shutdown(struct uart_port *port)
+static void stm32_usart_shutdown(struct uart_port *port)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
@@ -667,7 +675,7 @@ static void stm32_shutdown(struct uart_port *port)
int ret;
/* Disable modem control interrupts */
- stm32_disable_ms(port);
+ stm32_usart_disable_ms(port);
val = USART_CR1_TXEIE | USART_CR1_TE;
val |= stm32_port->cr1_irq | USART_CR1_RE;
@@ -679,15 +687,16 @@ static void stm32_shutdown(struct uart_port *port)
isr, (isr & USART_SR_TC),
10, 100000);
+ /* Send the TC error message only when ISR_TC is not set */
if (ret)
- dev_err(port->dev, "transmission complete not set\n");
+ dev_err(port->dev, "Transmission is not complete\n");
- stm32_clr_bits(port, ofs->cr1, val);
+ stm32_usart_clr_bits(port, ofs->cr1, val);
free_irq(port->irq, port);
}
-static unsigned int stm32_get_databits(struct ktermios *termios)
+static unsigned int stm32_usart_get_databits(struct ktermios *termios)
{
unsigned int bits;
@@ -717,8 +726,9 @@ static unsigned int stm32_get_databits(struct ktermios *termios)
return bits;
}
-static void stm32_set_termios(struct uart_port *port, struct ktermios *termios,
- struct ktermios *old)
+static void stm32_usart_set_termios(struct uart_port *port,
+ struct ktermios *termios,
+ struct ktermios *old)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
@@ -742,8 +752,8 @@ static void stm32_set_termios(struct uart_port *port, struct ktermios *termios,
/* flush RX & TX FIFO */
if (ofs->rqr != UNDEF_REG)
- stm32_set_bits(port, ofs->rqr,
- USART_RQR_TXFRQ | USART_RQR_RXFRQ);
+ stm32_usart_set_bits(port, ofs->rqr,
+ USART_RQR_TXFRQ | USART_RQR_RXFRQ);
cr1 = USART_CR1_TE | USART_CR1_RE;
if (stm32_port->fifoen)
@@ -756,7 +766,7 @@ static void stm32_set_termios(struct uart_port *port, struct ktermios *termios,
if (cflag & CSTOPB)
cr2 |= USART_CR2_STOP_2B;
- bits = stm32_get_databits(termios);
+ bits = stm32_usart_get_databits(termios);
stm32_port->rdr_mask = (BIT(bits) - 1);
if (cflag & PARENB) {
@@ -809,9 +819,9 @@ static void stm32_set_termios(struct uart_port *port, struct ktermios *termios,
/* Handle modem control interrupts */
if (UART_ENABLE_MS(port, termios->c_cflag))
- stm32_enable_ms(port);
+ stm32_usart_enable_ms(port);
else
- stm32_disable_ms(port);
+ stm32_usart_disable_ms(port);
usartdiv = DIV_ROUND_CLOSEST(port->uartclk, baud);
@@ -824,11 +834,11 @@ static void stm32_set_termios(struct uart_port *port, struct ktermios *termios,
if (usartdiv < 16) {
oversampling = 8;
cr1 |= USART_CR1_OVER8;
- stm32_set_bits(port, ofs->cr1, USART_CR1_OVER8);
+ stm32_usart_set_bits(port, ofs->cr1, USART_CR1_OVER8);
} else {
oversampling = 16;
cr1 &= ~USART_CR1_OVER8;
- stm32_clr_bits(port, ofs->cr1, USART_CR1_OVER8);
+ stm32_usart_clr_bits(port, ofs->cr1, USART_CR1_OVER8);
}
mantissa = (usartdiv / oversampling) << USART_BRR_DIV_M_SHIFT;
@@ -865,9 +875,10 @@ static void stm32_set_termios(struct uart_port *port, struct ktermios *termios,
cr3 |= USART_CR3_DMAR;
if (rs485conf->flags & SER_RS485_ENABLED) {
- stm32_config_reg_rs485(&cr1, &cr3,
- rs485conf->delay_rts_before_send,
- rs485conf->delay_rts_after_send, baud);
+ stm32_usart_config_reg_rs485(&cr1, &cr3,
+ rs485conf->delay_rts_before_send,
+ rs485conf->delay_rts_after_send,
+ baud);
if (rs485conf->flags & SER_RS485_RTS_ON_SEND) {
cr3 &= ~USART_CR3_DEP;
rs485conf->flags &= ~SER_RS485_RTS_AFTER_SEND;
@@ -885,39 +896,39 @@ static void stm32_set_termios(struct uart_port *port, struct ktermios *termios,
writel_relaxed(cr2, port->membase + ofs->cr2);
writel_relaxed(cr1, port->membase + ofs->cr1);
- stm32_set_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
+ stm32_usart_set_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
spin_unlock_irqrestore(&port->lock, flags);
}
-static const char *stm32_type(struct uart_port *port)
+static const char *stm32_usart_type(struct uart_port *port)
{
return (port->type == PORT_STM32) ? DRIVER_NAME : NULL;
}
-static void stm32_release_port(struct uart_port *port)
+static void stm32_usart_release_port(struct uart_port *port)
{
}
-static int stm32_request_port(struct uart_port *port)
+static int stm32_usart_request_port(struct uart_port *port)
{
return 0;
}
-static void stm32_config_port(struct uart_port *port, int flags)
+static void stm32_usart_config_port(struct uart_port *port, int flags)
{
if (flags & UART_CONFIG_TYPE)
port->type = PORT_STM32;
}
static int
-stm32_verify_port(struct uart_port *port, struct serial_struct *ser)
+stm32_usart_verify_port(struct uart_port *port, struct serial_struct *ser)
{
/* No user changeable parameters */
return -EINVAL;
}
-static void stm32_pm(struct uart_port *port, unsigned int state,
- unsigned int oldstate)
+static void stm32_usart_pm(struct uart_port *port, unsigned int state,
+ unsigned int oldstate)
{
struct stm32_port *stm32port = container_of(port,
struct stm32_port, port);
@@ -931,7 +942,7 @@ static void stm32_pm(struct uart_port *port, unsigned int state,
break;
case UART_PM_STATE_OFF:
spin_lock_irqsave(&port->lock, flags);
- stm32_clr_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
+ stm32_usart_clr_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
spin_unlock_irqrestore(&port->lock, flags);
pm_runtime_put_sync(port->dev);
break;
@@ -939,33 +950,42 @@ static void stm32_pm(struct uart_port *port, unsigned int state,
}
static const struct uart_ops stm32_uart_ops = {
- .tx_empty = stm32_tx_empty,
- .set_mctrl = stm32_set_mctrl,
- .get_mctrl = stm32_get_mctrl,
- .stop_tx = stm32_stop_tx,
- .start_tx = stm32_start_tx,
- .throttle = stm32_throttle,
- .unthrottle = stm32_unthrottle,
- .stop_rx = stm32_stop_rx,
- .enable_ms = stm32_enable_ms,
- .break_ctl = stm32_break_ctl,
- .startup = stm32_startup,
- .shutdown = stm32_shutdown,
- .set_termios = stm32_set_termios,
- .pm = stm32_pm,
- .type = stm32_type,
- .release_port = stm32_release_port,
- .request_port = stm32_request_port,
- .config_port = stm32_config_port,
- .verify_port = stm32_verify_port,
+ .tx_empty = stm32_usart_tx_empty,
+ .set_mctrl = stm32_usart_set_mctrl,
+ .get_mctrl = stm32_usart_get_mctrl,
+ .stop_tx = stm32_usart_stop_tx,
+ .start_tx = stm32_usart_start_tx,
+ .throttle = stm32_usart_throttle,
+ .unthrottle = stm32_usart_unthrottle,
+ .stop_rx = stm32_usart_stop_rx,
+ .enable_ms = stm32_usart_enable_ms,
+ .break_ctl = stm32_usart_break_ctl,
+ .startup = stm32_usart_startup,
+ .shutdown = stm32_usart_shutdown,
+ .set_termios = stm32_usart_set_termios,
+ .pm = stm32_usart_pm,
+ .type = stm32_usart_type,
+ .release_port = stm32_usart_release_port,
+ .request_port = stm32_usart_request_port,
+ .config_port = stm32_usart_config_port,
+ .verify_port = stm32_usart_verify_port,
};
-static int stm32_init_port(struct stm32_port *stm32port,
- struct platform_device *pdev)
+static void stm32_usart_deinit_port(struct stm32_port *stm32port)
+{
+ clk_disable_unprepare(stm32port->clk);
+}
+
+static int stm32_usart_init_port(struct stm32_port *stm32port,
+ struct platform_device *pdev)
{
struct uart_port *port = &stm32port->port;
struct resource *res;
- int ret;
+ int ret, irq;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq <= 0)
+ return irq ? : -ENODEV;
port->iotype = UPIO_MEM;
port->flags = UPF_BOOT_AUTOCONF;
@@ -973,15 +993,10 @@ static int stm32_init_port(struct stm32_port *stm32port,
port->dev = &pdev->dev;
port->fifosize = stm32port->info->cfg.fifosize;
port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_STM32_CONSOLE);
+ port->irq = irq;
+ port->rs485_config = stm32_usart_config_rs485;
- ret = platform_get_irq(pdev, 0);
- if (ret <= 0)
- return ret ? : -ENODEV;
- port->irq = ret;
-
- port->rs485_config = stm32_config_rs485;
-
- ret = stm32_init_rs485(port, pdev);
+ ret = stm32_usart_init_rs485(port, pdev);
if (ret)
return ret;
@@ -1022,7 +1037,10 @@ static int stm32_init_port(struct stm32_port *stm32port,
goto err_clk;
}
- /* Both CTS/RTS gpios and "st,hw-flow-ctrl" should not be specified */
+ /*
+ * Both CTS/RTS gpios and "st,hw-flow-ctrl" (deprecated) or "uart-has-rtscts"
+ * properties should not be specified.
+ */
if (stm32port->hw_flow_control) {
if (mctrl_gpio_to_gpiod(stm32port->gpios, UART_GPIO_CTS) ||
mctrl_gpio_to_gpiod(stm32port->gpios, UART_GPIO_RTS)) {
@@ -1040,7 +1058,7 @@ err_clk:
return ret;
}
-static struct stm32_port *stm32_of_get_stm32_port(struct platform_device *pdev)
+static struct stm32_port *stm32_usart_of_get_port(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
int id;
@@ -1078,8 +1096,8 @@ static const struct of_device_id stm32_match[] = {
MODULE_DEVICE_TABLE(of, stm32_match);
#endif
-static int stm32_of_dma_rx_probe(struct stm32_port *stm32port,
- struct platform_device *pdev)
+static int stm32_usart_of_dma_rx_probe(struct stm32_port *stm32port,
+ struct platform_device *pdev)
{
struct stm32_usart_offsets *ofs = &stm32port->info->ofs;
struct uart_port *port = &stm32port->port;
@@ -1095,8 +1113,8 @@ static int stm32_of_dma_rx_probe(struct stm32_port *stm32port,
return -ENODEV;
}
stm32port->rx_buf = dma_alloc_coherent(&pdev->dev, RX_BUF_L,
- &stm32port->rx_dma_buf,
- GFP_KERNEL);
+ &stm32port->rx_dma_buf,
+ GFP_KERNEL);
if (!stm32port->rx_buf) {
ret = -ENOMEM;
goto alloc_err;
@@ -1130,7 +1148,11 @@ static int stm32_of_dma_rx_probe(struct stm32_port *stm32port,
desc->callback_param = NULL;
/* Push current DMA transaction in the pending queue */
- dmaengine_submit(desc);
+ ret = dma_submit_error(dmaengine_submit(desc));
+ if (ret) {
+ dmaengine_terminate_sync(stm32port->rx_ch);
+ goto config_err;
+ }
/* Issue pending DMA requests */
dma_async_issue_pending(stm32port->rx_ch);
@@ -1149,8 +1171,8 @@ alloc_err:
return ret;
}
-static int stm32_of_dma_tx_probe(struct stm32_port *stm32port,
- struct platform_device *pdev)
+static int stm32_usart_of_dma_tx_probe(struct stm32_port *stm32port,
+ struct platform_device *pdev)
{
struct stm32_usart_offsets *ofs = &stm32port->info->ofs;
struct uart_port *port = &stm32port->port;
@@ -1167,8 +1189,8 @@ static int stm32_of_dma_tx_probe(struct stm32_port *stm32port,
return -ENODEV;
}
stm32port->tx_buf = dma_alloc_coherent(&pdev->dev, TX_BUF_L,
- &stm32port->tx_dma_buf,
- GFP_KERNEL);
+ &stm32port->tx_dma_buf,
+ GFP_KERNEL);
if (!stm32port->tx_buf) {
ret = -ENOMEM;
goto alloc_err;
@@ -1200,13 +1222,13 @@ alloc_err:
return ret;
}
-static int stm32_serial_probe(struct platform_device *pdev)
+static int stm32_usart_serial_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
struct stm32_port *stm32port;
int ret;
- stm32port = stm32_of_get_stm32_port(pdev);
+ stm32port = stm32_usart_of_get_port(pdev);
if (!stm32port)
return -ENODEV;
@@ -1216,7 +1238,7 @@ static int stm32_serial_probe(struct platform_device *pdev)
else
return -EINVAL;
- ret = stm32_init_port(stm32port, pdev);
+ ret = stm32_usart_init_port(stm32port, pdev);
if (ret)
return ret;
@@ -1237,11 +1259,11 @@ static int stm32_serial_probe(struct platform_device *pdev)
if (ret)
goto err_wirq;
- ret = stm32_of_dma_rx_probe(stm32port, pdev);
+ ret = stm32_usart_of_dma_rx_probe(stm32port, pdev);
if (ret)
dev_info(&pdev->dev, "interrupt mode used for rx (no dma)\n");
- ret = stm32_of_dma_tx_probe(stm32port, pdev);
+ ret = stm32_usart_of_dma_tx_probe(stm32port, pdev);
if (ret)
dev_info(&pdev->dev, "interrupt mode used for tx (no dma)\n");
@@ -1263,12 +1285,12 @@ err_nowup:
device_init_wakeup(&pdev->dev, false);
err_uninit:
- clk_disable_unprepare(stm32port->clk);
+ stm32_usart_deinit_port(stm32port);
return ret;
}
-static int stm32_serial_remove(struct platform_device *pdev)
+static int stm32_usart_serial_remove(struct platform_device *pdev)
{
struct uart_port *port = platform_get_drvdata(pdev);
struct stm32_port *stm32_port = to_stm32_port(port);
@@ -1277,7 +1299,7 @@ static int stm32_serial_remove(struct platform_device *pdev)
pm_runtime_get_sync(&pdev->dev);
- stm32_clr_bits(port, ofs->cr3, USART_CR3_DMAR);
+ stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_DMAR);
if (stm32_port->rx_ch)
dma_release_channel(stm32_port->rx_ch);
@@ -1287,7 +1309,7 @@ static int stm32_serial_remove(struct platform_device *pdev)
RX_BUF_L, stm32_port->rx_buf,
stm32_port->rx_dma_buf);
- stm32_clr_bits(port, ofs->cr3, USART_CR3_DMAT);
+ stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_DMAT);
if (stm32_port->tx_ch)
dma_release_channel(stm32_port->tx_ch);
@@ -1302,7 +1324,7 @@ static int stm32_serial_remove(struct platform_device *pdev)
device_init_wakeup(&pdev->dev, false);
}
- clk_disable_unprepare(stm32_port->clk);
+ stm32_usart_deinit_port(stm32_port);
err = uart_remove_one_port(&stm32_usart_driver, port);
@@ -1312,9 +1334,8 @@ static int stm32_serial_remove(struct platform_device *pdev)
return err;
}
-
#ifdef CONFIG_SERIAL_STM32_CONSOLE
-static void stm32_console_putchar(struct uart_port *port, int ch)
+static void stm32_usart_console_putchar(struct uart_port *port, int ch)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
@@ -1325,7 +1346,8 @@ static void stm32_console_putchar(struct uart_port *port, int ch)
writel_relaxed(ch, port->membase + ofs->tdr);
}
-static void stm32_console_write(struct console *co, const char *s, unsigned cnt)
+static void stm32_usart_console_write(struct console *co, const char *s,
+ unsigned int cnt)
{
struct uart_port *port = &stm32_ports[co->index].port;
struct stm32_port *stm32_port = to_stm32_port(port);
@@ -1349,7 +1371,7 @@ static void stm32_console_write(struct console *co, const char *s, unsigned cnt)
new_cr1 |= USART_CR1_TE | BIT(cfg->uart_enable_bit);
writel_relaxed(new_cr1, port->membase + ofs->cr1);
- uart_console_write(port, s, cnt, stm32_console_putchar);
+ uart_console_write(port, s, cnt, stm32_usart_console_putchar);
/* Restore interrupt state */
writel_relaxed(old_cr1, port->membase + ofs->cr1);
@@ -1359,7 +1381,7 @@ static void stm32_console_write(struct console *co, const char *s, unsigned cnt)
local_irq_restore(flags);
}
-static int stm32_console_setup(struct console *co, char *options)
+static int stm32_usart_console_setup(struct console *co, char *options)
{
struct stm32_port *stm32port;
int baud = 9600;
@@ -1378,7 +1400,7 @@ static int stm32_console_setup(struct console *co, char *options)
* this to be called during the uart port registration when the
* driver gets probed and the port should be mapped at that point.
*/
- if (stm32port->port.mapbase == 0 || stm32port->port.membase == NULL)
+ if (stm32port->port.mapbase == 0 || !stm32port->port.membase)
return -ENXIO;
if (options)
@@ -1390,8 +1412,8 @@ static int stm32_console_setup(struct console *co, char *options)
static struct console stm32_console = {
.name = STM32_SERIAL_NAME,
.device = uart_console_device,
- .write = stm32_console_write,
- .setup = stm32_console_setup,
+ .write = stm32_usart_console_write,
+ .setup = stm32_usart_console_setup,
.flags = CON_PRINTBUFFER,
.index = -1,
.data = &stm32_usart_driver,
@@ -1412,8 +1434,8 @@ static struct uart_driver stm32_usart_driver = {
.cons = STM32_SERIAL_CONSOLE,
};
-static void __maybe_unused stm32_serial_enable_wakeup(struct uart_port *port,
- bool enable)
+static void __maybe_unused stm32_usart_serial_en_wakeup(struct uart_port *port,
+ bool enable)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
@@ -1424,29 +1446,29 @@ static void __maybe_unused stm32_serial_enable_wakeup(struct uart_port *port,
return;
if (enable) {
- stm32_clr_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
- stm32_set_bits(port, ofs->cr1, USART_CR1_UESM);
+ stm32_usart_clr_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
+ stm32_usart_set_bits(port, ofs->cr1, USART_CR1_UESM);
val = readl_relaxed(port->membase + ofs->cr3);
val &= ~USART_CR3_WUS_MASK;
/* Enable Wake up interrupt from low power on start bit */
val |= USART_CR3_WUS_START_BIT | USART_CR3_WUFIE;
writel_relaxed(val, port->membase + ofs->cr3);
- stm32_set_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
+ stm32_usart_set_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit));
} else {
- stm32_clr_bits(port, ofs->cr1, USART_CR1_UESM);
+ stm32_usart_clr_bits(port, ofs->cr1, USART_CR1_UESM);
}
}
-static int __maybe_unused stm32_serial_suspend(struct device *dev)
+static int __maybe_unused stm32_usart_serial_suspend(struct device *dev)
{
struct uart_port *port = dev_get_drvdata(dev);
uart_suspend_port(&stm32_usart_driver, port);
if (device_may_wakeup(dev))
- stm32_serial_enable_wakeup(port, true);
+ stm32_usart_serial_en_wakeup(port, true);
else
- stm32_serial_enable_wakeup(port, false);
+ stm32_usart_serial_en_wakeup(port, false);
/*
* When "no_console_suspend" is enabled, keep the pinctrl default state
@@ -1464,19 +1486,19 @@ static int __maybe_unused stm32_serial_suspend(struct device *dev)
return 0;
}
-static int __maybe_unused stm32_serial_resume(struct device *dev)
+static int __maybe_unused stm32_usart_serial_resume(struct device *dev)
{
struct uart_port *port = dev_get_drvdata(dev);
pinctrl_pm_select_default_state(dev);
if (device_may_wakeup(dev))
- stm32_serial_enable_wakeup(port, false);
+ stm32_usart_serial_en_wakeup(port, false);
return uart_resume_port(&stm32_usart_driver, port);
}
-static int __maybe_unused stm32_serial_runtime_suspend(struct device *dev)
+static int __maybe_unused stm32_usart_runtime_suspend(struct device *dev)
{
struct uart_port *port = dev_get_drvdata(dev);
struct stm32_port *stm32port = container_of(port,
@@ -1487,7 +1509,7 @@ static int __maybe_unused stm32_serial_runtime_suspend(struct device *dev)
return 0;
}
-static int __maybe_unused stm32_serial_runtime_resume(struct device *dev)
+static int __maybe_unused stm32_usart_runtime_resume(struct device *dev)
{
struct uart_port *port = dev_get_drvdata(dev);
struct stm32_port *stm32port = container_of(port,
@@ -1497,14 +1519,15 @@ static int __maybe_unused stm32_serial_runtime_resume(struct device *dev)
}
static const struct dev_pm_ops stm32_serial_pm_ops = {
- SET_RUNTIME_PM_OPS(stm32_serial_runtime_suspend,
- stm32_serial_runtime_resume, NULL)
- SET_SYSTEM_SLEEP_PM_OPS(stm32_serial_suspend, stm32_serial_resume)
+ SET_RUNTIME_PM_OPS(stm32_usart_runtime_suspend,
+ stm32_usart_runtime_resume, NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(stm32_usart_serial_suspend,
+ stm32_usart_serial_resume)
};
static struct platform_driver stm32_serial_driver = {
- .probe = stm32_serial_probe,
- .remove = stm32_serial_remove,
+ .probe = stm32_usart_serial_probe,
+ .remove = stm32_usart_serial_remove,
.driver = {
.name = DRIVER_NAME,
.pm = &stm32_serial_pm_ops,
@@ -1512,7 +1535,7 @@ static struct platform_driver stm32_serial_driver = {
},
};
-static int __init usart_init(void)
+static int __init stm32_usart_init(void)
{
static char banner[] __initdata = "STM32 USART driver initialized";
int ret;
@@ -1530,14 +1553,14 @@ static int __init usart_init(void)
return ret;
}
-static void __exit usart_exit(void)
+static void __exit stm32_usart_exit(void)
{
platform_driver_unregister(&stm32_serial_driver);
uart_unregister_driver(&stm32_usart_driver);
}
-module_init(usart_init);
-module_exit(usart_exit);
+module_init(stm32_usart_init);
+module_exit(stm32_usart_exit);
MODULE_ALIAS("platform:" DRIVER_NAME);
MODULE_DESCRIPTION("STMicroelectronics STM32 serial port driver");
diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c
index c0b384e3ed4d..644173786bf0 100644
--- a/drivers/tty/synclink_gt.c
+++ b/drivers/tty/synclink_gt.c
@@ -672,7 +672,6 @@ static int open(struct tty_struct *tty, struct file *filp)
DBGINFO(("%s open, old ref count = %d\n", info->device_name, info->port.count));
mutex_lock(&info->port.mutex);
- info->port.low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
spin_lock_irqsave(&info->netlock, flags);
if (info->netcount) {
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 082da38762fc..74733ec8f565 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -142,7 +142,7 @@ LIST_HEAD(tty_drivers); /* linked list of tty drivers */
/* Mutex to protect creating and releasing a tty */
DEFINE_MUTEX(tty_mutex);
-static ssize_t tty_read(struct file *, char __user *, size_t, loff_t *);
+static ssize_t tty_read(struct kiocb *, struct iov_iter *);
static ssize_t tty_write(struct kiocb *, struct iov_iter *);
static __poll_t tty_poll(struct file *, poll_table *);
static int tty_open(struct inode *, struct file *);
@@ -429,8 +429,7 @@ struct tty_driver *tty_find_polling_driver(char *name, int *line)
EXPORT_SYMBOL_GPL(tty_find_polling_driver);
#endif
-static ssize_t hung_up_tty_read(struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
+static ssize_t hung_up_tty_read(struct kiocb *iocb, struct iov_iter *to)
{
return 0;
}
@@ -473,8 +472,9 @@ static void tty_show_fdinfo(struct seq_file *m, struct file *file)
static const struct file_operations tty_fops = {
.llseek = no_llseek,
- .read = tty_read,
+ .read_iter = tty_read,
.write_iter = tty_write,
+ .splice_read = generic_file_splice_read,
.splice_write = iter_file_splice_write,
.poll = tty_poll,
.unlocked_ioctl = tty_ioctl,
@@ -487,8 +487,9 @@ static const struct file_operations tty_fops = {
static const struct file_operations console_fops = {
.llseek = no_llseek,
- .read = tty_read,
+ .read_iter = tty_read,
.write_iter = redirected_tty_write,
+ .splice_read = generic_file_splice_read,
.splice_write = iter_file_splice_write,
.poll = tty_poll,
.unlocked_ioctl = tty_ioctl,
@@ -500,7 +501,7 @@ static const struct file_operations console_fops = {
static const struct file_operations hung_up_tty_fops = {
.llseek = no_llseek,
- .read = hung_up_tty_read,
+ .read_iter = hung_up_tty_read,
.write_iter = hung_up_tty_write,
.poll = hung_up_tty_poll,
.unlocked_ioctl = hung_up_tty_ioctl,
@@ -539,6 +540,29 @@ void tty_wakeup(struct tty_struct *tty)
EXPORT_SYMBOL_GPL(tty_wakeup);
/**
+ * tty_release_redirect - Release a redirect on a pty if present
+ * @tty: tty device
+ *
+ * This is available to the pty code so if the master closes, if the
+ * slave is a redirect it can release the redirect. It returns the
+ * filp for the redirect, which must be fput when the operations on
+ * the tty are completed.
+ */
+struct file *tty_release_redirect(struct tty_struct *tty)
+{
+ struct file *f = NULL;
+
+ spin_lock(&redirect_lock);
+ if (redirect && file_tty(redirect) == tty) {
+ f = redirect;
+ redirect = NULL;
+ }
+ spin_unlock(&redirect_lock);
+
+ return f;
+}
+
+/**
* __tty_hangup - actual handler for hangup events
* @tty: tty device
* @exit_session: if non-zero, signal all foreground group processes
@@ -564,7 +588,7 @@ EXPORT_SYMBOL_GPL(tty_wakeup);
static void __tty_hangup(struct tty_struct *tty, int exit_session)
{
struct file *cons_filp = NULL;
- struct file *filp, *f = NULL;
+ struct file *filp, *f;
struct tty_file_private *priv;
int closecount = 0, n;
int refs;
@@ -572,13 +596,7 @@ static void __tty_hangup(struct tty_struct *tty, int exit_session)
if (!tty)
return;
-
- spin_lock(&redirect_lock);
- if (redirect && file_tty(redirect) == tty) {
- f = redirect;
- redirect = NULL;
- }
- spin_unlock(&redirect_lock);
+ f = tty_release_redirect(tty);
tty_lock(tty);
@@ -829,6 +847,72 @@ static void tty_update_time(struct timespec64 *time)
time->tv_sec = sec;
}
+/*
+ * Iterate on the ldisc ->read() function until we've gotten all
+ * the data the ldisc has for us.
+ *
+ * The "cookie" is something that the ldisc read function can fill
+ * in to let us know that there is more data to be had.
+ *
+ * We promise to continue to call the ldisc until it stops returning
+ * data or clears the cookie. The cookie may be something that the
+ * ldisc maintains state for and needs to free.
+ */
+static int iterate_tty_read(struct tty_ldisc *ld, struct tty_struct *tty,
+ struct file *file, struct iov_iter *to)
+{
+ int retval = 0;
+ void *cookie = NULL;
+ unsigned long offset = 0;
+ char kernel_buf[64];
+ size_t count = iov_iter_count(to);
+
+ do {
+ int size, copied;
+
+ size = count > sizeof(kernel_buf) ? sizeof(kernel_buf) : count;
+ size = ld->ops->read(tty, file, kernel_buf, size, &cookie, offset);
+ if (!size)
+ break;
+
+ if (size < 0) {
+ /* Did we have an earlier error (ie -EFAULT)? */
+ if (retval)
+ break;
+ retval = size;
+
+ /*
+ * -EOVERFLOW means we didn't have enough space
+ * for a whole packet, and we shouldn't return
+ * a partial result.
+ */
+ if (retval == -EOVERFLOW)
+ offset = 0;
+ break;
+ }
+
+ copied = copy_to_iter(kernel_buf, size, to);
+ offset += copied;
+ count -= copied;
+
+ /*
+ * If the user copy failed, we still need to do another ->read()
+ * call if we had a cookie to let the ldisc clear up.
+ *
+ * But make sure size is zeroed.
+ */
+ if (unlikely(copied != size)) {
+ count = 0;
+ retval = -EFAULT;
+ }
+ } while (cookie);
+
+ /* We always clear tty buffer in case they contained passwords */
+ memzero_explicit(kernel_buf, sizeof(kernel_buf));
+ return offset ? offset : retval;
+}
+
+
/**
* tty_read - read method for tty device files
* @file: pointer to tty file
@@ -844,10 +928,10 @@ static void tty_update_time(struct timespec64 *time)
* read calls may be outstanding in parallel.
*/
-static ssize_t tty_read(struct file *file, char __user *buf, size_t count,
- loff_t *ppos)
+static ssize_t tty_read(struct kiocb *iocb, struct iov_iter *to)
{
int i;
+ struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(file);
struct tty_struct *tty = file_tty(file);
struct tty_ldisc *ld;
@@ -861,11 +945,10 @@ static ssize_t tty_read(struct file *file, char __user *buf, size_t count,
situation */
ld = tty_ldisc_ref_wait(tty);
if (!ld)
- return hung_up_tty_read(file, buf, count, ppos);
+ return hung_up_tty_read(iocb, to);
+ i = -EIO;
if (ld->ops->read)
- i = ld->ops->read(tty, file, buf, count);
- else
- i = -EIO;
+ i = iterate_tty_read(ld, tty, file, to);
tty_ldisc_deref(ld);
if (i > 0)
@@ -1889,22 +1972,7 @@ static struct tty_driver *tty_lookup_driver(dev_t device, struct file *filp,
return driver;
}
-/**
- * tty_kopen - open a tty device for kernel
- * @device: dev_t of device to open
- *
- * Opens tty exclusively for kernel. Performs the driver lookup,
- * makes sure it's not already opened and performs the first-time
- * tty initialization.
- *
- * Returns the locked initialized &tty_struct
- *
- * Claims the global tty_mutex to serialize:
- * - concurrent first-time tty initialization
- * - concurrent tty driver removal w/ lookup
- * - concurrent tty removal from driver table
- */
-struct tty_struct *tty_kopen(dev_t device)
+static struct tty_struct *tty_kopen(dev_t device, int shared)
{
struct tty_struct *tty;
struct tty_driver *driver;
@@ -1919,7 +1987,7 @@ struct tty_struct *tty_kopen(dev_t device)
/* check whether we're reopening an existing tty */
tty = tty_driver_lookup_tty(driver, NULL, index);
- if (IS_ERR(tty))
+ if (IS_ERR(tty) || shared)
goto out;
if (tty) {
@@ -1937,7 +2005,42 @@ out:
tty_driver_kref_put(driver);
return tty;
}
-EXPORT_SYMBOL_GPL(tty_kopen);
+
+/**
+ * tty_kopen_exclusive - open a tty device for kernel
+ * @device: dev_t of device to open
+ *
+ * Opens tty exclusively for kernel. Performs the driver lookup,
+ * makes sure it's not already opened and performs the first-time
+ * tty initialization.
+ *
+ * Returns the locked initialized &tty_struct
+ *
+ * Claims the global tty_mutex to serialize:
+ * - concurrent first-time tty initialization
+ * - concurrent tty driver removal w/ lookup
+ * - concurrent tty removal from driver table
+ */
+struct tty_struct *tty_kopen_exclusive(dev_t device)
+{
+ return tty_kopen(device, 0);
+}
+EXPORT_SYMBOL_GPL(tty_kopen_exclusive);
+
+/**
+ * tty_kopen_shared - open a tty device for shared in-kernel use
+ * @device: dev_t of device to open
+ *
+ * Opens an already existing tty for in-kernel use. Compared to
+ * tty_kopen_exclusive() above it doesn't ensure to be the only user.
+ *
+ * Locking is identical to tty_kopen() above.
+ */
+struct tty_struct *tty_kopen_shared(dev_t device)
+{
+ return tty_kopen(device, 1);
+}
+EXPORT_SYMBOL_GPL(tty_kopen_shared);
/**
* tty_open_by_driver - open a tty device
@@ -2488,15 +2591,36 @@ static int tty_tiocmset(struct tty_struct *tty, unsigned int cmd,
return tty->ops->tiocmset(tty, set, clear);
}
+/**
+ * tty_get_icount - get tty statistics
+ * @tty: tty device
+ * @icount: output parameter
+ *
+ * Gets a copy of the tty's icount statistics.
+ *
+ * Locking: none (up to the driver)
+ */
+int tty_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
+{
+ memset(icount, 0, sizeof(*icount));
+
+ if (tty->ops->get_icount)
+ return tty->ops->get_icount(tty, icount);
+ else
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(tty_get_icount);
+
static int tty_tiocgicount(struct tty_struct *tty, void __user *arg)
{
- int retval = -EINVAL;
struct serial_icounter_struct icount;
- memset(&icount, 0, sizeof(icount));
- if (tty->ops->get_icount)
- retval = tty->ops->get_icount(tty, &icount);
+ int retval;
+
+ retval = tty_get_icount(tty, &icount);
if (retval != 0)
return retval;
+
if (copy_to_user(arg, &icount, sizeof(icount)))
return -EFAULT;
return 0;
@@ -2887,7 +3011,7 @@ static long tty_compat_ioctl(struct file *file, unsigned int cmd,
static int this_tty(const void *t, struct file *file, unsigned fd)
{
- if (likely(file->f_op->read != tty_read))
+ if (likely(file->f_op->read_iter != tty_read))
return 0;
return file_tty(file) != t ? 0 : fd + 1;
}
diff --git a/drivers/tty/vcc.c b/drivers/tty/vcc.c
index 9ffd42e333b8..e2d6205f83ce 100644
--- a/drivers/tty/vcc.c
+++ b/drivers/tty/vcc.c
@@ -681,9 +681,6 @@ static int vcc_remove(struct vio_dev *vdev)
{
struct vcc_port *port = dev_get_drvdata(&vdev->dev);
- if (!port)
- return -ENODEV;
-
del_timer_sync(&port->rx_timer);
del_timer_sync(&port->tx_timer);
@@ -695,12 +692,9 @@ static int vcc_remove(struct vio_dev *vdev)
tty_vhangup(port->tty);
/* Get exclusive reference to VCC, ensures that there are no other
- * clients to this port
+ * clients to this port. This cannot fail.
*/
- port = vcc_get(port->index, true);
-
- if (WARN_ON(!port))
- return -ENODEV;
+ vcc_get(port->index, true);
tty_unregister_device(vcc_tty_driver, port->index);
diff --git a/drivers/tty/vt/consolemap.c b/drivers/tty/vt/consolemap.c
index f7d015c67963..d815ac98b39e 100644
--- a/drivers/tty/vt/consolemap.c
+++ b/drivers/tty/vt/consolemap.c
@@ -495,7 +495,7 @@ con_insert_unipair(struct uni_pagedir *p, u_short unicode, u_short fontpos)
p2[unicode & 0x3f] = fontpos;
- p->sum += (fontpos << 20) + unicode;
+ p->sum += (fontpos << 20U) + unicode;
return 0;
}
diff --git a/drivers/tty/vt/defkeymap.c_shipped b/drivers/tty/vt/defkeymap.c_shipped
index c7095fb7d2d1..094d95bf0005 100644
--- a/drivers/tty/vt/defkeymap.c_shipped
+++ b/drivers/tty/vt/defkeymap.c_shipped
@@ -6,7 +6,7 @@
#include <linux/keyboard.h>
#include <linux/kd.h>
-u_short plain_map[NR_KEYS] = {
+unsigned short plain_map[NR_KEYS] = {
0xf200, 0xf01b, 0xf031, 0xf032, 0xf033, 0xf034, 0xf035, 0xf036,
0xf037, 0xf038, 0xf039, 0xf030, 0xf02d, 0xf03d, 0xf07f, 0xf009,
0xfb71, 0xfb77, 0xfb65, 0xfb72, 0xfb74, 0xfb79, 0xfb75, 0xfb69,
@@ -25,7 +25,7 @@ u_short plain_map[NR_KEYS] = {
0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200,
};
-u_short shift_map[NR_KEYS] = {
+static unsigned short shift_map[NR_KEYS] = {
0xf200, 0xf01b, 0xf021, 0xf040, 0xf023, 0xf024, 0xf025, 0xf05e,
0xf026, 0xf02a, 0xf028, 0xf029, 0xf05f, 0xf02b, 0xf07f, 0xf009,
0xfb51, 0xfb57, 0xfb45, 0xfb52, 0xfb54, 0xfb59, 0xfb55, 0xfb49,
@@ -44,7 +44,7 @@ u_short shift_map[NR_KEYS] = {
0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200,
};
-u_short altgr_map[NR_KEYS] = {
+static unsigned short altgr_map[NR_KEYS] = {
0xf200, 0xf200, 0xf200, 0xf040, 0xf200, 0xf024, 0xf200, 0xf200,
0xf07b, 0xf05b, 0xf05d, 0xf07d, 0xf05c, 0xf200, 0xf200, 0xf200,
0xfb71, 0xfb77, 0xf918, 0xfb72, 0xfb74, 0xfb79, 0xfb75, 0xfb69,
@@ -63,7 +63,7 @@ u_short altgr_map[NR_KEYS] = {
0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200,
};
-u_short ctrl_map[NR_KEYS] = {
+static unsigned short ctrl_map[NR_KEYS] = {
0xf200, 0xf200, 0xf200, 0xf000, 0xf01b, 0xf01c, 0xf01d, 0xf01e,
0xf01f, 0xf07f, 0xf200, 0xf200, 0xf01f, 0xf200, 0xf008, 0xf200,
0xf011, 0xf017, 0xf005, 0xf012, 0xf014, 0xf019, 0xf015, 0xf009,
@@ -82,7 +82,7 @@ u_short ctrl_map[NR_KEYS] = {
0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200,
};
-u_short shift_ctrl_map[NR_KEYS] = {
+static unsigned short shift_ctrl_map[NR_KEYS] = {
0xf200, 0xf200, 0xf200, 0xf000, 0xf200, 0xf200, 0xf200, 0xf200,
0xf200, 0xf200, 0xf200, 0xf200, 0xf01f, 0xf200, 0xf200, 0xf200,
0xf011, 0xf017, 0xf005, 0xf012, 0xf014, 0xf019, 0xf015, 0xf009,
@@ -101,7 +101,7 @@ u_short shift_ctrl_map[NR_KEYS] = {
0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200,
};
-u_short alt_map[NR_KEYS] = {
+static unsigned short alt_map[NR_KEYS] = {
0xf200, 0xf81b, 0xf831, 0xf832, 0xf833, 0xf834, 0xf835, 0xf836,
0xf837, 0xf838, 0xf839, 0xf830, 0xf82d, 0xf83d, 0xf87f, 0xf809,
0xf871, 0xf877, 0xf865, 0xf872, 0xf874, 0xf879, 0xf875, 0xf869,
@@ -120,7 +120,7 @@ u_short alt_map[NR_KEYS] = {
0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200,
};
-u_short ctrl_alt_map[NR_KEYS] = {
+static unsigned short ctrl_alt_map[NR_KEYS] = {
0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200,
0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200,
0xf811, 0xf817, 0xf805, 0xf812, 0xf814, 0xf819, 0xf815, 0xf809,
@@ -224,40 +224,40 @@ char *func_table[MAX_NR_FUNC] = {
};
struct kbdiacruc accent_table[MAX_DIACR] = {
- {'`', 'A', 0300}, {'`', 'a', 0340},
- {'\'', 'A', 0301}, {'\'', 'a', 0341},
- {'^', 'A', 0302}, {'^', 'a', 0342},
- {'~', 'A', 0303}, {'~', 'a', 0343},
- {'"', 'A', 0304}, {'"', 'a', 0344},
- {'O', 'A', 0305}, {'o', 'a', 0345},
- {'0', 'A', 0305}, {'0', 'a', 0345},
- {'A', 'A', 0305}, {'a', 'a', 0345},
- {'A', 'E', 0306}, {'a', 'e', 0346},
- {',', 'C', 0307}, {',', 'c', 0347},
- {'`', 'E', 0310}, {'`', 'e', 0350},
- {'\'', 'E', 0311}, {'\'', 'e', 0351},
- {'^', 'E', 0312}, {'^', 'e', 0352},
- {'"', 'E', 0313}, {'"', 'e', 0353},
- {'`', 'I', 0314}, {'`', 'i', 0354},
- {'\'', 'I', 0315}, {'\'', 'i', 0355},
- {'^', 'I', 0316}, {'^', 'i', 0356},
- {'"', 'I', 0317}, {'"', 'i', 0357},
- {'-', 'D', 0320}, {'-', 'd', 0360},
- {'~', 'N', 0321}, {'~', 'n', 0361},
- {'`', 'O', 0322}, {'`', 'o', 0362},
- {'\'', 'O', 0323}, {'\'', 'o', 0363},
- {'^', 'O', 0324}, {'^', 'o', 0364},
- {'~', 'O', 0325}, {'~', 'o', 0365},
- {'"', 'O', 0326}, {'"', 'o', 0366},
- {'/', 'O', 0330}, {'/', 'o', 0370},
- {'`', 'U', 0331}, {'`', 'u', 0371},
- {'\'', 'U', 0332}, {'\'', 'u', 0372},
- {'^', 'U', 0333}, {'^', 'u', 0373},
- {'"', 'U', 0334}, {'"', 'u', 0374},
- {'\'', 'Y', 0335}, {'\'', 'y', 0375},
- {'T', 'H', 0336}, {'t', 'h', 0376},
- {'s', 's', 0337}, {'"', 'y', 0377},
- {'s', 'z', 0337}, {'i', 'j', 0377},
+ {'`', 'A', 0x00c0}, {'`', 'a', 0x00e0},
+ {'\'', 'A', 0x00c1}, {'\'', 'a', 0x00e1},
+ {'^', 'A', 0x00c2}, {'^', 'a', 0x00e2},
+ {'~', 'A', 0x00c3}, {'~', 'a', 0x00e3},
+ {'"', 'A', 0x00c4}, {'"', 'a', 0x00e4},
+ {'O', 'A', 0x00c5}, {'o', 'a', 0x00e5},
+ {'0', 'A', 0x00c5}, {'0', 'a', 0x00e5},
+ {'A', 'A', 0x00c5}, {'a', 'a', 0x00e5},
+ {'A', 'E', 0x00c6}, {'a', 'e', 0x00e6},
+ {',', 'C', 0x00c7}, {',', 'c', 0x00e7},
+ {'`', 'E', 0x00c8}, {'`', 'e', 0x00e8},
+ {'\'', 'E', 0x00c9}, {'\'', 'e', 0x00e9},
+ {'^', 'E', 0x00ca}, {'^', 'e', 0x00ea},
+ {'"', 'E', 0x00cb}, {'"', 'e', 0x00eb},
+ {'`', 'I', 0x00cc}, {'`', 'i', 0x00ec},
+ {'\'', 'I', 0x00cd}, {'\'', 'i', 0x00ed},
+ {'^', 'I', 0x00ce}, {'^', 'i', 0x00ee},
+ {'"', 'I', 0x00cf}, {'"', 'i', 0x00ef},
+ {'-', 'D', 0x00d0}, {'-', 'd', 0x00f0},
+ {'~', 'N', 0x00d1}, {'~', 'n', 0x00f1},
+ {'`', 'O', 0x00d2}, {'`', 'o', 0x00f2},
+ {'\'', 'O', 0x00d3}, {'\'', 'o', 0x00f3},
+ {'^', 'O', 0x00d4}, {'^', 'o', 0x00f4},
+ {'~', 'O', 0x00d5}, {'~', 'o', 0x00f5},
+ {'"', 'O', 0x00d6}, {'"', 'o', 0x00f6},
+ {'/', 'O', 0x00d8}, {'/', 'o', 0x00f8},
+ {'`', 'U', 0x00d9}, {'`', 'u', 0x00f9},
+ {'\'', 'U', 0x00da}, {'\'', 'u', 0x00fa},
+ {'^', 'U', 0x00db}, {'^', 'u', 0x00fb},
+ {'"', 'U', 0x00dc}, {'"', 'u', 0x00fc},
+ {'\'', 'Y', 0x00dd}, {'\'', 'y', 0x00fd},
+ {'T', 'H', 0x00de}, {'t', 'h', 0x00fe},
+ {'s', 's', 0x00df}, {'"', 'y', 0x00ff},
+ {'s', 'z', 0x00df}, {'i', 'j', 0x00ff},
};
unsigned int accent_table_size = 68;
diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c
index 52922d21a49f..77638629c562 100644
--- a/drivers/tty/vt/keyboard.c
+++ b/drivers/tty/vt/keyboard.c
@@ -131,6 +131,9 @@ static const unsigned char max_vals[] = {
static const int NR_TYPES = ARRAY_SIZE(max_vals);
+static void kbd_bh(struct tasklet_struct *unused);
+static DECLARE_TASKLET_DISABLED(keyboard_tasklet, kbd_bh);
+
static struct input_handler kbd_handler;
static DEFINE_SPINLOCK(kbd_event_lock);
static DEFINE_SPINLOCK(led_lock);
@@ -372,6 +375,12 @@ static void to_utf8(struct vc_data *vc, uint c)
}
}
+/* FIXME: review locking for vt.c callers */
+static void set_leds(void)
+{
+ tasklet_schedule(&keyboard_tasklet);
+}
+
/*
* Called after returning from RAW mode or when changing consoles - recompute
* shift_down[] and shift_state from key_down[] maybe called when keymap is
@@ -401,9 +410,12 @@ static void do_compute_shiftstate(void)
}
/* We still have to export this method to vt.c */
-void compute_shiftstate(void)
+void vt_set_leds_compute_shiftstate(void)
{
unsigned long flags;
+
+ set_leds();
+
spin_lock_irqsave(&kbd_event_lock, flags);
do_compute_shiftstate();
spin_unlock_irqrestore(&kbd_event_lock, flags);
@@ -1233,7 +1245,7 @@ void vt_kbd_con_stop(int console)
* handle the scenario when keyboard handler is not registered yet
* but we already getting updates from the VT to update led state.
*/
-static void kbd_bh(unsigned long dummy)
+static void kbd_bh(struct tasklet_struct *unused)
{
unsigned int leds;
unsigned long flags;
@@ -1249,8 +1261,6 @@ static void kbd_bh(unsigned long dummy)
}
}
-DECLARE_TASKLET_DISABLED_OLD(keyboard_tasklet, kbd_bh);
-
#if defined(CONFIG_X86) || defined(CONFIG_IA64) || defined(CONFIG_ALPHA) ||\
defined(CONFIG_MIPS) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) ||\
defined(CONFIG_PARISC) || defined(CONFIG_SUPERH) ||\
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index d04a162939a4..284b07224c55 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -1036,8 +1036,7 @@ void redraw_screen(struct vc_data *vc, int is_switch)
}
set_cursor(vc);
if (is_switch) {
- set_leds();
- compute_shiftstate();
+ vt_set_leds_compute_shiftstate();
notify_update(vc);
}
}
@@ -4584,16 +4583,8 @@ static int con_font_get(struct vc_data *vc, struct console_font_op *op)
if (op->data && font.charcount > op->charcount)
rc = -ENOSPC;
- if (!(op->flags & KD_FONT_FLAG_OLD)) {
- if (font.width > op->width || font.height > op->height)
- rc = -ENOSPC;
- } else {
- if (font.width != 8)
- rc = -EIO;
- else if ((op->height && font.height > op->height) ||
- font.height > 32)
- rc = -ENOSPC;
- }
+ if (font.width > op->width || font.height > op->height)
+ rc = -ENOSPC;
if (rc)
goto out;
@@ -4621,7 +4612,7 @@ static int con_font_set(struct vc_data *vc, struct console_font_op *op)
return -EINVAL;
if (op->charcount > 512)
return -EINVAL;
- if (op->width <= 0 || op->width > 32 || op->height > 32)
+ if (op->width <= 0 || op->width > 32 || !op->height || op->height > 32)
return -EINVAL;
size = (op->width+7)/8 * 32 * op->charcount;
if (size > max_font_size)
@@ -4631,31 +4622,6 @@ static int con_font_set(struct vc_data *vc, struct console_font_op *op)
if (IS_ERR(font.data))
return PTR_ERR(font.data);
- if (!op->height) { /* Need to guess font height [compat] */
- int h, i;
- u8 *charmap = font.data;
-
- /*
- * If from KDFONTOP ioctl, don't allow things which can be done
- * in userland,so that we can get rid of this soon
- */
- if (!(op->flags & KD_FONT_FLAG_OLD)) {
- kfree(font.data);
- return -EINVAL;
- }
-
- for (h = 32; h > 0; h--)
- for (i = 0; i < op->charcount; i++)
- if (charmap[32*i+h-1])
- goto nonzero;
-
- kfree(font.data);
- return -EINVAL;
-
- nonzero:
- op->height = h;
- }
-
font.charcount = op->charcount;
font.width = op->width;
font.height = op->height;
diff --git a/drivers/tty/vt/vt_ioctl.c b/drivers/tty/vt/vt_ioctl.c
index 3813c40f1b48..89aeaf3c1bca 100644
--- a/drivers/tty/vt/vt_ioctl.c
+++ b/drivers/tty/vt/vt_ioctl.c
@@ -484,70 +484,6 @@ static int vt_k_ioctl(struct tty_struct *tty, unsigned int cmd,
return 0;
}
-static inline int do_fontx_ioctl(struct vc_data *vc, int cmd,
- struct consolefontdesc __user *user_cfd,
- struct console_font_op *op)
-{
- struct consolefontdesc cfdarg;
- int i;
-
- if (copy_from_user(&cfdarg, user_cfd, sizeof(struct consolefontdesc)))
- return -EFAULT;
-
- switch (cmd) {
- case PIO_FONTX:
- op->op = KD_FONT_OP_SET;
- op->flags = KD_FONT_FLAG_OLD;
- op->width = 8;
- op->height = cfdarg.charheight;
- op->charcount = cfdarg.charcount;
- op->data = cfdarg.chardata;
- return con_font_op(vc, op);
-
- case GIO_FONTX:
- op->op = KD_FONT_OP_GET;
- op->flags = KD_FONT_FLAG_OLD;
- op->width = 8;
- op->height = cfdarg.charheight;
- op->charcount = cfdarg.charcount;
- op->data = cfdarg.chardata;
- i = con_font_op(vc, op);
- if (i)
- return i;
- cfdarg.charheight = op->height;
- cfdarg.charcount = op->charcount;
- if (copy_to_user(user_cfd, &cfdarg, sizeof(struct consolefontdesc)))
- return -EFAULT;
- return 0;
- }
- return -EINVAL;
-}
-
-static int vt_io_fontreset(struct vc_data *vc, struct console_font_op *op)
-{
- int ret;
-
- if (__is_defined(BROKEN_GRAPHICS_PROGRAMS)) {
- /*
- * With BROKEN_GRAPHICS_PROGRAMS defined, the default font is
- * not saved.
- */
- return -ENOSYS;
- }
-
- op->op = KD_FONT_OP_SET_DEFAULT;
- op->data = NULL;
- ret = con_font_op(vc, op);
- if (ret)
- return ret;
-
- console_lock();
- con_set_default_unimap(vc);
- console_unlock();
-
- return 0;
-}
-
static inline int do_unimap_ioctl(int cmd, struct unimapdesc __user *user_ud,
bool perm, struct vc_data *vc)
{
@@ -572,29 +508,7 @@ static inline int do_unimap_ioctl(int cmd, struct unimapdesc __user *user_ud,
static int vt_io_ioctl(struct vc_data *vc, unsigned int cmd, void __user *up,
bool perm)
{
- struct console_font_op op; /* used in multiple places here */
-
switch (cmd) {
- case PIO_FONT:
- if (!perm)
- return -EPERM;
- op.op = KD_FONT_OP_SET;
- op.flags = KD_FONT_FLAG_OLD | KD_FONT_FLAG_DONT_RECALC; /* Compatibility */
- op.width = 8;
- op.height = 0;
- op.charcount = 256;
- op.data = up;
- return con_font_op(vc, &op);
-
- case GIO_FONT:
- op.op = KD_FONT_OP_GET;
- op.flags = KD_FONT_FLAG_OLD;
- op.width = 8;
- op.height = 32;
- op.charcount = 256;
- op.data = up;
- return con_font_op(vc, &op);
-
case PIO_CMAP:
if (!perm)
return -EPERM;
@@ -603,20 +517,6 @@ static int vt_io_ioctl(struct vc_data *vc, unsigned int cmd, void __user *up,
case GIO_CMAP:
return con_get_cmap(up);
- case PIO_FONTX:
- if (!perm)
- return -EPERM;
-
- fallthrough;
- case GIO_FONTX:
- return do_fontx_ioctl(vc, cmd, up, &op);
-
- case PIO_FONTRESET:
- if (!perm)
- return -EPERM;
-
- return vt_io_fontreset(vc, &op);
-
case PIO_SCRNMAP:
if (!perm)
return -EPERM;
@@ -1030,8 +930,7 @@ void reset_vc(struct vc_data *vc)
put_pid(vc->vt_pid);
vc->vt_pid = NULL;
vc->vt_newvt = -1;
- if (!in_interrupt()) /* Via keyboard.c:SAK() - akpm */
- reset_palette(vc);
+ reset_palette(vc);
}
void vc_SAK(struct work_struct *work)
@@ -1059,54 +958,6 @@ void vc_SAK(struct work_struct *work)
#ifdef CONFIG_COMPAT
-struct compat_consolefontdesc {
- unsigned short charcount; /* characters in font (256 or 512) */
- unsigned short charheight; /* scan lines per character (1-32) */
- compat_caddr_t chardata; /* font data in expanded form */
-};
-
-static inline int
-compat_fontx_ioctl(struct vc_data *vc, int cmd,
- struct compat_consolefontdesc __user *user_cfd,
- int perm, struct console_font_op *op)
-{
- struct compat_consolefontdesc cfdarg;
- int i;
-
- if (copy_from_user(&cfdarg, user_cfd, sizeof(struct compat_consolefontdesc)))
- return -EFAULT;
-
- switch (cmd) {
- case PIO_FONTX:
- if (!perm)
- return -EPERM;
- op->op = KD_FONT_OP_SET;
- op->flags = KD_FONT_FLAG_OLD;
- op->width = 8;
- op->height = cfdarg.charheight;
- op->charcount = cfdarg.charcount;
- op->data = compat_ptr(cfdarg.chardata);
- return con_font_op(vc, op);
-
- case GIO_FONTX:
- op->op = KD_FONT_OP_GET;
- op->flags = KD_FONT_FLAG_OLD;
- op->width = 8;
- op->height = cfdarg.charheight;
- op->charcount = cfdarg.charcount;
- op->data = compat_ptr(cfdarg.chardata);
- i = con_font_op(vc, op);
- if (i)
- return i;
- cfdarg.charheight = op->height;
- cfdarg.charcount = op->charcount;
- if (copy_to_user(user_cfd, &cfdarg, sizeof(struct compat_consolefontdesc)))
- return -EFAULT;
- return 0;
- }
- return -EINVAL;
-}
-
struct compat_console_font_op {
compat_uint_t op; /* operation code KD_FONT_OP_* */
compat_uint_t flags; /* KD_FONT_FLAG_* */
@@ -1183,9 +1034,6 @@ long vt_compat_ioctl(struct tty_struct *tty,
/*
* these need special handlers for incompatible data structures
*/
- case PIO_FONTX:
- case GIO_FONTX:
- return compat_fontx_ioctl(vc, cmd, up, perm, &op);
case KDFONTOP:
return compat_kdfontop_ioctl(up, perm, &op, vc);
diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c
index 17876f0179b5..962c12be9774 100644
--- a/drivers/video/console/vgacon.c
+++ b/drivers/video/console/vgacon.c
@@ -90,7 +90,6 @@ static unsigned int vga_video_num_lines; /* Number of text lines */
static bool vga_can_do_color; /* Do we support colors? */
static unsigned int vga_default_font_height __read_mostly; /* Height of default screen font */
static unsigned char vga_video_type __read_mostly; /* Card type */
-static bool vga_font_is_default = true;
static int vga_vesa_blanked;
static bool vga_palette_blanked;
static bool vga_is_gfx;
@@ -878,7 +877,6 @@ static int vgacon_do_font_op(struct vgastate *state, char *arg, int set,
beg = 0x0a;
}
-#ifdef BROKEN_GRAPHICS_PROGRAMS
/*
* All fonts are loaded in slot 0 (0:1 for 512 ch)
*/
@@ -886,24 +884,7 @@ static int vgacon_do_font_op(struct vgastate *state, char *arg, int set,
if (!arg)
return -EINVAL; /* Return to default font not supported */
- vga_font_is_default = false;
font_select = ch512 ? 0x04 : 0x00;
-#else
- /*
- * The default font is kept in slot 0 and is never touched.
- * A custom font is loaded in slot 2 (256 ch) or 2:3 (512 ch)
- */
-
- if (set) {
- vga_font_is_default = !arg;
- if (!arg)
- ch512 = false; /* Default font is always 256 */
- font_select = arg ? (ch512 ? 0x0e : 0x0a) : 0x00;
- }
-
- if (!vga_font_is_default)
- charmap += 4 * cmapsz;
-#endif
raw_spin_lock_irq(&vga_lock);
/* First, the Sequencer */
diff --git a/include/linux/kbd_kern.h b/include/linux/kbd_kern.h
index 82f29aa35062..c40811d79769 100644
--- a/include/linux/kbd_kern.h
+++ b/include/linux/kbd_kern.h
@@ -6,8 +6,6 @@
#include <linux/interrupt.h>
#include <linux/keyboard.h>
-extern struct tasklet_struct keyboard_tasklet;
-
extern char *func_table[MAX_NR_FUNC];
/*
@@ -71,12 +69,6 @@ extern void (*kbd_ledfunc)(unsigned int led);
extern int set_console(int nr);
extern void schedule_console_callback(void);
-/* FIXME: review locking for vt.c callers */
-static inline void set_leds(void)
-{
- tasklet_schedule(&keyboard_tasklet);
-}
-
static inline int vc_kbd_mode(struct kbd_struct * kbd, int flag)
{
return ((kbd->modeflags >> flag) & 1);
@@ -135,7 +127,7 @@ static inline void chg_vc_kbd_led(struct kbd_struct * kbd, int flag)
struct console;
-void compute_shiftstate(void);
+void vt_set_leds_compute_shiftstate(void);
/* defkeymap.c */
diff --git a/include/linux/kd.h b/include/linux/kd.h
deleted file mode 100644
index b130a18f860f..000000000000
--- a/include/linux/kd.h
+++ /dev/null
@@ -1,8 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _LINUX_KD_H
-#define _LINUX_KD_H
-
-#include <uapi/linux/kd.h>
-
-#define KD_FONT_FLAG_OLD 0x80000000 /* Invoked via old interface [compat] */
-#endif /* _LINUX_KD_H */
diff --git a/include/linux/platform_data/efm32-uart.h b/include/linux/platform_data/efm32-uart.h
deleted file mode 100644
index ccbb8f11db75..000000000000
--- a/include/linux/platform_data/efm32-uart.h
+++ /dev/null
@@ -1,19 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- *
- *
- */
-#ifndef __LINUX_PLATFORM_DATA_EFM32_UART_H__
-#define __LINUX_PLATFORM_DATA_EFM32_UART_H__
-
-#include <linux/types.h>
-
-/**
- * struct efm32_uart_pdata
- * @location: pinmux location for the I/O pins (to be written to the ROUTE
- * register)
- */
-struct efm32_uart_pdata {
- u8 location;
-};
-#endif /* ifndef __LINUX_PLATFORM_DATA_EFM32_UART_H__ */
diff --git a/include/linux/spi/ifx_modem.h b/include/linux/spi/ifx_modem.h
deleted file mode 100644
index 6d19b09139d0..000000000000
--- a/include/linux/spi/ifx_modem.h
+++ /dev/null
@@ -1,15 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef LINUX_IFX_MODEM_H
-#define LINUX_IFX_MODEM_H
-
-struct ifx_modem_platform_data {
- unsigned short tx_pwr; /* modem power threshold */
- unsigned char modem_type; /* Modem type */
- unsigned long max_hz; /* max SPI frequency */
- unsigned short use_dma:1; /* spi protocol driver supplies
- dma-able addrs */
-};
-#define IFX_MODEM_6160 1
-#define IFX_MODEM_6260 2
-
-#endif
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 37803f3e6d49..95fc2f100f12 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -240,8 +240,7 @@ struct tty_port {
wait_queue_head_t delta_msr_wait; /* Modem status change */
unsigned long flags; /* User TTY flags ASYNC_ */
unsigned long iflags; /* Internal flags TTY_PORT_ */
- unsigned char console:1, /* port is a console */
- low_latency:1; /* optional: tune for latency */
+ unsigned char console:1; /* port is a console */
struct mutex mutex; /* Locking */
struct mutex buf_mutex; /* Buffer alloc lock */
unsigned char *xmit_buf; /* Optional buffer */
@@ -416,12 +415,14 @@ extern struct tty_struct *get_current_tty(void);
/* tty_io.c */
extern int __init tty_init(void);
extern const char *tty_name(const struct tty_struct *tty);
-extern struct tty_struct *tty_kopen(dev_t device);
+extern struct tty_struct *tty_kopen_exclusive(dev_t device);
+extern struct tty_struct *tty_kopen_shared(dev_t device);
extern void tty_kclose(struct tty_struct *tty);
extern int tty_dev_name_to_number(const char *name, dev_t *number);
extern int tty_ldisc_lock(struct tty_struct *tty, unsigned long timeout);
extern void tty_ldisc_unlock(struct tty_struct *tty);
extern ssize_t redirected_tty_write(struct kiocb *, struct iov_iter *);
+extern struct file *tty_release_redirect(struct tty_struct *tty);
#else
static inline void tty_kref_put(struct tty_struct *tty)
{ }
@@ -442,7 +443,7 @@ static inline int __init tty_init(void)
{ return 0; }
static inline const char *tty_name(const struct tty_struct *tty)
{ return "(none)"; }
-static inline struct tty_struct *tty_kopen(dev_t device)
+static inline struct tty_struct *tty_kopen_exclusive(dev_t device)
{ return ERR_PTR(-ENODEV); }
static inline void tty_kclose(struct tty_struct *tty)
{ }
@@ -500,6 +501,8 @@ extern void tty_unthrottle(struct tty_struct *tty);
extern int tty_throttle_safe(struct tty_struct *tty);
extern int tty_unthrottle_safe(struct tty_struct *tty);
extern int tty_do_resize(struct tty_struct *tty, struct winsize *ws);
+extern int tty_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount);
extern int is_current_pgrp_orphaned(void);
extern void tty_hangup(struct tty_struct *tty);
extern void tty_vhangup(struct tty_struct *tty);
diff --git a/include/linux/tty_ldisc.h b/include/linux/tty_ldisc.h
index b1e6043e9917..572a07976116 100644
--- a/include/linux/tty_ldisc.h
+++ b/include/linux/tty_ldisc.h
@@ -185,7 +185,8 @@ struct tty_ldisc_ops {
void (*close)(struct tty_struct *);
void (*flush_buffer)(struct tty_struct *tty);
ssize_t (*read)(struct tty_struct *tty, struct file *file,
- unsigned char __user *buf, size_t nr);
+ unsigned char *buf, size_t nr,
+ void **cookie, unsigned long offset);
ssize_t (*write)(struct tty_struct *tty, struct file *file,
const unsigned char *buf, size_t nr);
int (*ioctl)(struct tty_struct *tty, struct file *file,
diff --git a/include/linux/vt_kern.h b/include/linux/vt_kern.h
index 349e39c3ab60..94e7a315479c 100644
--- a/include/linux/vt_kern.h
+++ b/include/linux/vt_kern.h
@@ -16,18 +16,6 @@
#include <linux/consolemap.h>
#include <linux/notifier.h>
-/*
- * Presently, a lot of graphics programs do not restore the contents of
- * the higher font pages. Defining this flag will avoid use of them, but
- * will lose support for PIO_FONTRESET. Note that many font operations are
- * not likely to work with these programs anyway; they need to be
- * fixed. The linux/Documentation directory includes a code snippet
- * to save and restore the text font.
- */
-#ifdef CONFIG_VGA_CONSOLE
-#define BROKEN_GRAPHICS_PROGRAMS 1
-#endif
-
void kd_mksound(unsigned int hz, unsigned int ticks);
int kbd_rate(struct kbd_repeat *rep);
diff --git a/include/uapi/linux/serial_core.h b/include/uapi/linux/serial_core.h
index 62c22045fe65..c4042dcfdc0c 100644
--- a/include/uapi/linux/serial_core.h
+++ b/include/uapi/linux/serial_core.h
@@ -208,9 +208,6 @@
/* Atheros AR933X SoC */
#define PORT_AR933X 99
-/* Energy Micro efm32 SoC */
-#define PORT_EFMUART 100
-
/* ARC (Synopsys) on-chip UART */
#define PORT_ARC 101
diff --git a/include/uapi/linux/termios.h b/include/uapi/linux/termios.h
index 33961d4e4de0..e6da9d4433d1 100644
--- a/include/uapi/linux/termios.h
+++ b/include/uapi/linux/termios.h
@@ -5,19 +5,4 @@
#include <linux/types.h>
#include <asm/termios.h>
-#define NFF 5
-
-struct termiox
-{
- __u16 x_hflag;
- __u16 x_cflag;
- __u16 x_rflag[NFF];
- __u16 x_sflag;
-};
-
-#define RTSXOFF 0x0001 /* RTS flow control on input */
-#define CTSXON 0x0002 /* CTS flow control on output */
-#define DTRXOFF 0x0004 /* DTR flow control on input */
-#define DSRXON 0x0008 /* DCD flow control on output */
-
#endif
diff --git a/net/nfc/nci/uart.c b/net/nfc/nci/uart.c
index 11b554ce07ff..1204c438e87d 100644
--- a/net/nfc/nci/uart.c
+++ b/net/nfc/nci/uart.c
@@ -292,7 +292,8 @@ static int nci_uart_tty_ioctl(struct tty_struct *tty, struct file *file,
/* We don't provide read/write/poll interface for user space. */
static ssize_t nci_uart_tty_read(struct tty_struct *tty, struct file *file,
- unsigned char __user *buf, size_t nr)
+ unsigned char *buf, size_t nr,
+ void **cookie, unsigned long offset)
{
return 0;
}