diff options
author | Sean Young <sean@mess.org> | 2017-11-02 16:39:16 -0400 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-12-14 10:35:23 -0500 |
commit | 42e0442f8a237d3de9ea3f2dd2be2739e6db7fdb (patch) | |
tree | 438851cd2d530b3e80e84ded367bf6ee26cf5a0e | |
parent | 8a866fee3909c49738e1c4429a8d2b9bf27e015d (diff) | |
download | linux-42e0442f8a237d3de9ea3f2dd2be2739e6db7fdb.tar.bz2 |
media: rc: move ir-lirc-codec.c contents into lirc_dev.c
Since removing the lirc kapi, ir-lirc-codec.c only contains lirc fops
so the file name is no longer correct. By moving its content into
lirc_dev.c the ugly extern struct lirc_fops is not longer needed,
and everything lirc related is in one file.
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
-rw-r--r-- | drivers/media/rc/Makefile | 2 | ||||
-rw-r--r-- | drivers/media/rc/ir-lirc-codec.c | 623 | ||||
-rw-r--r-- | drivers/media/rc/lirc_dev.c | 604 | ||||
-rw-r--r-- | drivers/media/rc/rc-core-priv.h | 2 |
4 files changed, 605 insertions, 626 deletions
diff --git a/drivers/media/rc/Makefile b/drivers/media/rc/Makefile index 081b34f97164..0e857816ac2d 100644 --- a/drivers/media/rc/Makefile +++ b/drivers/media/rc/Makefile @@ -4,7 +4,7 @@ obj-y += keymaps/ obj-$(CONFIG_RC_CORE) += rc-core.o rc-core-y := rc-main.o rc-ir-raw.o -rc-core-$(CONFIG_LIRC) += lirc_dev.o ir-lirc-codec.o +rc-core-$(CONFIG_LIRC) += lirc_dev.o obj-$(CONFIG_IR_NEC_DECODER) += ir-nec-decoder.o obj-$(CONFIG_IR_RC5_DECODER) += ir-rc5-decoder.o obj-$(CONFIG_IR_RC6_DECODER) += ir-rc6-decoder.o diff --git a/drivers/media/rc/ir-lirc-codec.c b/drivers/media/rc/ir-lirc-codec.c deleted file mode 100644 index 8c5df6e8579e..000000000000 --- a/drivers/media/rc/ir-lirc-codec.c +++ /dev/null @@ -1,623 +0,0 @@ -/* ir-lirc-codec.c - rc-core to classic lirc interface bridge - * - * Copyright (C) 2010 by Jarod Wilson <jarod@redhat.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation version 2 of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include <linux/poll.h> -#include <linux/sched.h> -#include <linux/wait.h> -#include <media/lirc.h> -#include <media/rc-core.h> -#include "rc-core-priv.h" - -#define LIRCBUF_SIZE 256 - -/** - * ir_lirc_raw_event() - Send raw IR data to lirc to be relayed to userspace - * - * @dev: the struct rc_dev descriptor of the device - * @ev: the struct ir_raw_event descriptor of the pulse/space - */ -void ir_lirc_raw_event(struct rc_dev *dev, struct ir_raw_event ev) -{ - int sample; - - /* Packet start */ - if (ev.reset) { - /* Userspace expects a long space event before the start of - * the signal to use as a sync. This may be done with repeat - * packets and normal samples. But if a reset has been sent - * then we assume that a long time has passed, so we send a - * space with the maximum time value. */ - sample = LIRC_SPACE(LIRC_VALUE_MASK); - IR_dprintk(2, "delivering reset sync space to lirc_dev\n"); - - /* Carrier reports */ - } else if (ev.carrier_report) { - sample = LIRC_FREQUENCY(ev.carrier); - IR_dprintk(2, "carrier report (freq: %d)\n", sample); - - /* Packet end */ - } else if (ev.timeout) { - - if (dev->gap) - return; - - dev->gap_start = ktime_get(); - dev->gap = true; - dev->gap_duration = ev.duration; - - if (!dev->send_timeout_reports) - return; - - sample = LIRC_TIMEOUT(ev.duration / 1000); - IR_dprintk(2, "timeout report (duration: %d)\n", sample); - - /* Normal sample */ - } else { - - if (dev->gap) { - dev->gap_duration += ktime_to_ns(ktime_sub(ktime_get(), - dev->gap_start)); - - /* Convert to ms and cap by LIRC_VALUE_MASK */ - do_div(dev->gap_duration, 1000); - dev->gap_duration = min_t(u64, dev->gap_duration, - LIRC_VALUE_MASK); - - kfifo_put(&dev->rawir, LIRC_SPACE(dev->gap_duration)); - dev->gap = false; - } - - sample = ev.pulse ? LIRC_PULSE(ev.duration / 1000) : - LIRC_SPACE(ev.duration / 1000); - IR_dprintk(2, "delivering %uus %s to lirc_dev\n", - TO_US(ev.duration), TO_STR(ev.pulse)); - } - - kfifo_put(&dev->rawir, sample); - wake_up_poll(&dev->wait_poll, POLLIN | POLLRDNORM); -} - -/** - * ir_lirc_scancode_event() - Send scancode data to lirc to be relayed to - * userspace - * @dev: the struct rc_dev descriptor of the device - * @lsc: the struct lirc_scancode describing the decoded scancode - */ -void ir_lirc_scancode_event(struct rc_dev *dev, struct lirc_scancode *lsc) -{ - lsc->timestamp = ktime_get_ns(); - - if (kfifo_put(&dev->scancodes, *lsc)) - wake_up_poll(&dev->wait_poll, POLLIN | POLLRDNORM); -} -EXPORT_SYMBOL_GPL(ir_lirc_scancode_event); - -static int ir_lirc_open(struct inode *inode, struct file *file) -{ - struct rc_dev *dev = container_of(inode->i_cdev, struct rc_dev, - lirc_cdev); - int retval; - - retval = rc_open(dev); - if (retval) - return retval; - - retval = mutex_lock_interruptible(&dev->lock); - if (retval) - goto out_rc; - - if (!dev->registered) { - retval = -ENODEV; - goto out_unlock; - } - - if (dev->lirc_open) { - retval = -EBUSY; - goto out_unlock; - } - - if (dev->driver_type == RC_DRIVER_IR_RAW) - kfifo_reset_out(&dev->rawir); - if (dev->driver_type != RC_DRIVER_IR_RAW_TX) - kfifo_reset_out(&dev->scancodes); - - dev->lirc_open++; - file->private_data = dev; - - nonseekable_open(inode, file); - mutex_unlock(&dev->lock); - - return 0; - -out_unlock: - mutex_unlock(&dev->lock); -out_rc: - rc_close(dev); - return retval; -} - -static int ir_lirc_close(struct inode *inode, struct file *file) -{ - struct rc_dev *dev = file->private_data; - - mutex_lock(&dev->lock); - dev->lirc_open--; - mutex_unlock(&dev->lock); - - rc_close(dev); - - return 0; -} - -static ssize_t ir_lirc_transmit_ir(struct file *file, const char __user *buf, - size_t n, loff_t *ppos) -{ - struct rc_dev *dev = file->private_data; - unsigned int *txbuf = NULL; - struct ir_raw_event *raw = NULL; - ssize_t ret = -EINVAL; - size_t count; - ktime_t start; - s64 towait; - unsigned int duration = 0; /* signal duration in us */ - int i; - - if (!dev->registered) - return -ENODEV; - - start = ktime_get(); - - if (!dev->tx_ir) { - ret = -EINVAL; - goto out; - } - - if (dev->send_mode == LIRC_MODE_SCANCODE) { - struct lirc_scancode scan; - - if (n != sizeof(scan)) - return -EINVAL; - - if (copy_from_user(&scan, buf, sizeof(scan))) - return -EFAULT; - - if (scan.flags || scan.keycode || scan.timestamp) - return -EINVAL; - - /* - * The scancode field in lirc_scancode is 64-bit simply - * to future-proof it, since there are IR protocols encode - * use more than 32 bits. For now only 32-bit protocols - * are supported. - */ - if (scan.scancode > U32_MAX || - !rc_validate_scancode(scan.rc_proto, scan.scancode)) - return -EINVAL; - - raw = kmalloc_array(LIRCBUF_SIZE, sizeof(*raw), GFP_KERNEL); - if (!raw) - return -ENOMEM; - - ret = ir_raw_encode_scancode(scan.rc_proto, scan.scancode, - raw, LIRCBUF_SIZE); - if (ret < 0) - goto out; - - count = ret; - - txbuf = kmalloc_array(count, sizeof(unsigned int), GFP_KERNEL); - if (!txbuf) { - ret = -ENOMEM; - goto out; - } - - for (i = 0; i < count; i++) - /* Convert from NS to US */ - txbuf[i] = DIV_ROUND_UP(raw[i].duration, 1000); - - if (dev->s_tx_carrier) { - int carrier = ir_raw_encode_carrier(scan.rc_proto); - - if (carrier > 0) - dev->s_tx_carrier(dev, carrier); - } - } else { - if (n < sizeof(unsigned int) || n % sizeof(unsigned int)) - return -EINVAL; - - count = n / sizeof(unsigned int); - if (count > LIRCBUF_SIZE || count % 2 == 0) - return -EINVAL; - - txbuf = memdup_user(buf, n); - if (IS_ERR(txbuf)) - return PTR_ERR(txbuf); - } - - for (i = 0; i < count; i++) { - if (txbuf[i] > IR_MAX_DURATION / 1000 - duration || !txbuf[i]) { - ret = -EINVAL; - goto out; - } - - duration += txbuf[i]; - } - - ret = dev->tx_ir(dev, txbuf, count); - if (ret < 0) - goto out; - - if (dev->send_mode == LIRC_MODE_SCANCODE) { - ret = n; - } else { - for (duration = i = 0; i < ret; i++) - duration += txbuf[i]; - - ret *= sizeof(unsigned int); - - /* - * The lircd gap calculation expects the write function to - * wait for the actual IR signal to be transmitted before - * returning. - */ - towait = ktime_us_delta(ktime_add_us(start, duration), - ktime_get()); - if (towait > 0) { - set_current_state(TASK_INTERRUPTIBLE); - schedule_timeout(usecs_to_jiffies(towait)); - } - } - -out: - kfree(txbuf); - kfree(raw); - return ret; -} - -static long ir_lirc_ioctl(struct file *filep, unsigned int cmd, - unsigned long arg) -{ - struct rc_dev *dev = filep->private_data; - u32 __user *argp = (u32 __user *)(arg); - int ret = 0; - __u32 val = 0, tmp; - - if (_IOC_DIR(cmd) & _IOC_WRITE) { - ret = get_user(val, argp); - if (ret) - return ret; - } - - if (!dev->registered) - return -ENODEV; - - switch (cmd) { - case LIRC_GET_FEATURES: - if (dev->driver_type == RC_DRIVER_SCANCODE) - val |= LIRC_CAN_REC_SCANCODE; - - if (dev->driver_type == RC_DRIVER_IR_RAW) { - val |= LIRC_CAN_REC_MODE2 | LIRC_CAN_REC_SCANCODE; - if (dev->rx_resolution) - val |= LIRC_CAN_GET_REC_RESOLUTION; - } - - if (dev->tx_ir) { - val |= LIRC_CAN_SEND_PULSE | LIRC_CAN_SEND_SCANCODE; - if (dev->s_tx_mask) - val |= LIRC_CAN_SET_TRANSMITTER_MASK; - if (dev->s_tx_carrier) - val |= LIRC_CAN_SET_SEND_CARRIER; - if (dev->s_tx_duty_cycle) - val |= LIRC_CAN_SET_SEND_DUTY_CYCLE; - } - - if (dev->s_rx_carrier_range) - val |= LIRC_CAN_SET_REC_CARRIER | - LIRC_CAN_SET_REC_CARRIER_RANGE; - - if (dev->s_learning_mode) - val |= LIRC_CAN_USE_WIDEBAND_RECEIVER; - - if (dev->s_carrier_report) - val |= LIRC_CAN_MEASURE_CARRIER; - - if (dev->max_timeout) - val |= LIRC_CAN_SET_REC_TIMEOUT; - - break; - - /* mode support */ - case LIRC_GET_REC_MODE: - if (dev->driver_type == RC_DRIVER_IR_RAW_TX) - return -ENOTTY; - - val = dev->rec_mode; - break; - - case LIRC_SET_REC_MODE: - switch (dev->driver_type) { - case RC_DRIVER_IR_RAW_TX: - return -ENOTTY; - case RC_DRIVER_SCANCODE: - if (val != LIRC_MODE_SCANCODE) - return -EINVAL; - break; - case RC_DRIVER_IR_RAW: - if (!(val == LIRC_MODE_MODE2 || - val == LIRC_MODE_SCANCODE)) - return -EINVAL; - break; - } - - dev->rec_mode = val; - return 0; - - case LIRC_GET_SEND_MODE: - if (!dev->tx_ir) - return -ENOTTY; - - val = dev->send_mode; - break; - - case LIRC_SET_SEND_MODE: - if (!dev->tx_ir) - return -ENOTTY; - - if (!(val == LIRC_MODE_PULSE || val == LIRC_MODE_SCANCODE)) - return -EINVAL; - - dev->send_mode = val; - return 0; - - /* TX settings */ - case LIRC_SET_TRANSMITTER_MASK: - if (!dev->s_tx_mask) - return -ENOTTY; - - return dev->s_tx_mask(dev, val); - - case LIRC_SET_SEND_CARRIER: - if (!dev->s_tx_carrier) - return -ENOTTY; - - return dev->s_tx_carrier(dev, val); - - case LIRC_SET_SEND_DUTY_CYCLE: - if (!dev->s_tx_duty_cycle) - return -ENOTTY; - - if (val <= 0 || val >= 100) - return -EINVAL; - - return dev->s_tx_duty_cycle(dev, val); - - /* RX settings */ - case LIRC_SET_REC_CARRIER: - if (!dev->s_rx_carrier_range) - return -ENOTTY; - - if (val <= 0) - return -EINVAL; - - return dev->s_rx_carrier_range(dev, - dev->carrier_low, - val); - - case LIRC_SET_REC_CARRIER_RANGE: - if (!dev->s_rx_carrier_range) - return -ENOTTY; - - if (val <= 0) - return -EINVAL; - - dev->carrier_low = val; - return 0; - - case LIRC_GET_REC_RESOLUTION: - if (!dev->rx_resolution) - return -ENOTTY; - - val = dev->rx_resolution / 1000; - break; - - case LIRC_SET_WIDEBAND_RECEIVER: - if (!dev->s_learning_mode) - return -ENOTTY; - - return dev->s_learning_mode(dev, !!val); - - case LIRC_SET_MEASURE_CARRIER_MODE: - if (!dev->s_carrier_report) - return -ENOTTY; - - return dev->s_carrier_report(dev, !!val); - - /* Generic timeout support */ - case LIRC_GET_MIN_TIMEOUT: - if (!dev->max_timeout) - return -ENOTTY; - val = DIV_ROUND_UP(dev->min_timeout, 1000); - break; - - case LIRC_GET_MAX_TIMEOUT: - if (!dev->max_timeout) - return -ENOTTY; - val = dev->max_timeout / 1000; - break; - - case LIRC_SET_REC_TIMEOUT: - if (!dev->max_timeout) - return -ENOTTY; - - /* Check for multiply overflow */ - if (val > U32_MAX / 1000) - return -EINVAL; - - tmp = val * 1000; - - if (tmp < dev->min_timeout || tmp > dev->max_timeout) - return -EINVAL; - - if (dev->s_timeout) - ret = dev->s_timeout(dev, tmp); - if (!ret) - dev->timeout = tmp; - break; - - case LIRC_SET_REC_TIMEOUT_REPORTS: - if (!dev->timeout) - return -ENOTTY; - - dev->send_timeout_reports = !!val; - break; - - default: - return -ENOTTY; - } - - if (_IOC_DIR(cmd) & _IOC_READ) - ret = put_user(val, argp); - - return ret; -} - -static unsigned int ir_lirc_poll(struct file *file, - struct poll_table_struct *wait) -{ - struct rc_dev *rcdev = file->private_data; - unsigned int events = 0; - - poll_wait(file, &rcdev->wait_poll, wait); - - if (!rcdev->registered) { - events = POLLHUP | POLLERR; - } else if (rcdev->driver_type != RC_DRIVER_IR_RAW_TX) { - if (rcdev->rec_mode == LIRC_MODE_SCANCODE && - !kfifo_is_empty(&rcdev->scancodes)) - events = POLLIN | POLLRDNORM; - - if (rcdev->rec_mode == LIRC_MODE_MODE2 && - !kfifo_is_empty(&rcdev->rawir)) - events = POLLIN | POLLRDNORM; - } - - return events; -} - -static ssize_t ir_lirc_read_mode2(struct file *file, char __user *buffer, - size_t length) -{ - struct rc_dev *rcdev = file->private_data; - unsigned int copied; - int ret; - - if (length < sizeof(unsigned int) || length % sizeof(unsigned int)) - return -EINVAL; - - do { - if (kfifo_is_empty(&rcdev->rawir)) { - if (file->f_flags & O_NONBLOCK) - return -EAGAIN; - - ret = wait_event_interruptible(rcdev->wait_poll, - !kfifo_is_empty(&rcdev->rawir) || - !rcdev->registered); - if (ret) - return ret; - } - - if (!rcdev->registered) - return -ENODEV; - - ret = mutex_lock_interruptible(&rcdev->lock); - if (ret) - return ret; - ret = kfifo_to_user(&rcdev->rawir, buffer, length, &copied); - mutex_unlock(&rcdev->lock); - if (ret) - return ret; - } while (copied == 0); - - return copied; -} - -static ssize_t ir_lirc_read_scancode(struct file *file, char __user *buffer, - size_t length) -{ - struct rc_dev *rcdev = file->private_data; - unsigned int copied; - int ret; - - if (length < sizeof(struct lirc_scancode) || - length % sizeof(struct lirc_scancode)) - return -EINVAL; - - do { - if (kfifo_is_empty(&rcdev->scancodes)) { - if (file->f_flags & O_NONBLOCK) - return -EAGAIN; - - ret = wait_event_interruptible(rcdev->wait_poll, - !kfifo_is_empty(&rcdev->scancodes) || - !rcdev->registered); - if (ret) - return ret; - } - - if (!rcdev->registered) - return -ENODEV; - - ret = mutex_lock_interruptible(&rcdev->lock); - if (ret) - return ret; - ret = kfifo_to_user(&rcdev->scancodes, buffer, length, &copied); - mutex_unlock(&rcdev->lock); - if (ret) - return ret; - } while (copied == 0); - - return copied; -} - -static ssize_t ir_lirc_read(struct file *file, char __user *buffer, - size_t length, loff_t *ppos) -{ - struct rc_dev *rcdev = file->private_data; - - if (rcdev->driver_type == RC_DRIVER_IR_RAW_TX) - return -EINVAL; - - if (!rcdev->registered) - return -ENODEV; - - if (rcdev->rec_mode == LIRC_MODE_MODE2) - return ir_lirc_read_mode2(file, buffer, length); - else /* LIRC_MODE_SCANCODE */ - return ir_lirc_read_scancode(file, buffer, length); -} - -const struct file_operations lirc_fops = { - .owner = THIS_MODULE, - .write = ir_lirc_transmit_ir, - .unlocked_ioctl = ir_lirc_ioctl, -#ifdef CONFIG_COMPAT - .compat_ioctl = ir_lirc_ioctl, -#endif - .read = ir_lirc_read, - .poll = ir_lirc_poll, - .open = ir_lirc_open, - .release = ir_lirc_close, - .llseek = no_llseek, -}; diff --git a/drivers/media/rc/lirc_dev.c b/drivers/media/rc/lirc_dev.c index 2a0c48698309..97d60f0b5836 100644 --- a/drivers/media/rc/lirc_dev.c +++ b/drivers/media/rc/lirc_dev.c @@ -22,11 +22,14 @@ #include <linux/device.h> #include <linux/idr.h> #include <linux/poll.h> +#include <linux/sched.h> +#include <linux/wait.h> #include "rc-core-priv.h" #include <media/lirc.h> #define LOGHEAD "lirc_dev (%s[%d]): " +#define LIRCBUF_SIZE 256 static dev_t lirc_base_dev; @@ -36,6 +39,607 @@ static DEFINE_IDA(lirc_ida); /* Only used for sysfs but defined to void otherwise */ static struct class *lirc_class; +/** + * ir_lirc_raw_event() - Send raw IR data to lirc to be relayed to userspace + * + * @dev: the struct rc_dev descriptor of the device + * @ev: the struct ir_raw_event descriptor of the pulse/space + */ +void ir_lirc_raw_event(struct rc_dev *dev, struct ir_raw_event ev) +{ + int sample; + + /* Packet start */ + if (ev.reset) { + /* + * Userspace expects a long space event before the start of + * the signal to use as a sync. This may be done with repeat + * packets and normal samples. But if a reset has been sent + * then we assume that a long time has passed, so we send a + * space with the maximum time value. + */ + sample = LIRC_SPACE(LIRC_VALUE_MASK); + IR_dprintk(2, "delivering reset sync space to lirc_dev\n"); + + /* Carrier reports */ + } else if (ev.carrier_report) { + sample = LIRC_FREQUENCY(ev.carrier); + IR_dprintk(2, "carrier report (freq: %d)\n", sample); + + /* Packet end */ + } else if (ev.timeout) { + if (dev->gap) + return; + + dev->gap_start = ktime_get(); + dev->gap = true; + dev->gap_duration = ev.duration; + + if (!dev->send_timeout_reports) + return; + + sample = LIRC_TIMEOUT(ev.duration / 1000); + IR_dprintk(2, "timeout report (duration: %d)\n", sample); + + /* Normal sample */ + } else { + if (dev->gap) { + dev->gap_duration += ktime_to_ns(ktime_sub(ktime_get(), + dev->gap_start)); + + /* Convert to ms and cap by LIRC_VALUE_MASK */ + do_div(dev->gap_duration, 1000); + dev->gap_duration = min_t(u64, dev->gap_duration, + LIRC_VALUE_MASK); + + kfifo_put(&dev->rawir, LIRC_SPACE(dev->gap_duration)); + dev->gap = false; + } + + sample = ev.pulse ? LIRC_PULSE(ev.duration / 1000) : + LIRC_SPACE(ev.duration / 1000); + IR_dprintk(2, "delivering %uus %s to lirc_dev\n", + TO_US(ev.duration), TO_STR(ev.pulse)); + } + + kfifo_put(&dev->rawir, sample); + wake_up_poll(&dev->wait_poll, POLLIN | POLLRDNORM); +} + +/** + * ir_lirc_scancode_event() - Send scancode data to lirc to be relayed to + * userspace + * @dev: the struct rc_dev descriptor of the device + * @lsc: the struct lirc_scancode describing the decoded scancode + */ +void ir_lirc_scancode_event(struct rc_dev *dev, struct lirc_scancode *lsc) +{ + lsc->timestamp = ktime_get_ns(); + + if (kfifo_put(&dev->scancodes, *lsc)) + wake_up_poll(&dev->wait_poll, POLLIN | POLLRDNORM); +} +EXPORT_SYMBOL_GPL(ir_lirc_scancode_event); + +static int ir_lirc_open(struct inode *inode, struct file *file) +{ + struct rc_dev *dev = container_of(inode->i_cdev, struct rc_dev, + lirc_cdev); + int retval; + + retval = rc_open(dev); + if (retval) + return retval; + + retval = mutex_lock_interruptible(&dev->lock); + if (retval) + goto out_rc; + + if (!dev->registered) { + retval = -ENODEV; + goto out_unlock; + } + + if (dev->lirc_open) { + retval = -EBUSY; + goto out_unlock; + } + + if (dev->driver_type == RC_DRIVER_IR_RAW) + kfifo_reset_out(&dev->rawir); + if (dev->driver_type != RC_DRIVER_IR_RAW_TX) + kfifo_reset_out(&dev->scancodes); + + dev->lirc_open++; + file->private_data = dev; + + nonseekable_open(inode, file); + mutex_unlock(&dev->lock); + + return 0; + +out_unlock: + mutex_unlock(&dev->lock); +out_rc: + rc_close(dev); + return retval; +} + +static int ir_lirc_close(struct inode *inode, struct file *file) +{ + struct rc_dev *dev = file->private_data; + + mutex_lock(&dev->lock); + dev->lirc_open--; + mutex_unlock(&dev->lock); + + rc_close(dev); + + return 0; +} + +static ssize_t ir_lirc_transmit_ir(struct file *file, const char __user *buf, + size_t n, loff_t *ppos) +{ + struct rc_dev *dev = file->private_data; + unsigned int *txbuf = NULL; + struct ir_raw_event *raw = NULL; + ssize_t ret = -EINVAL; + size_t count; + ktime_t start; + s64 towait; + unsigned int duration = 0; /* signal duration in us */ + int i; + + if (!dev->registered) + return -ENODEV; + + start = ktime_get(); + + if (!dev->tx_ir) { + ret = -EINVAL; + goto out; + } + + if (dev->send_mode == LIRC_MODE_SCANCODE) { + struct lirc_scancode scan; + + if (n != sizeof(scan)) + return -EINVAL; + + if (copy_from_user(&scan, buf, sizeof(scan))) + return -EFAULT; + + if (scan.flags || scan.keycode || scan.timestamp) + return -EINVAL; + + /* + * The scancode field in lirc_scancode is 64-bit simply + * to future-proof it, since there are IR protocols encode + * use more than 32 bits. For now only 32-bit protocols + * are supported. + */ + if (scan.scancode > U32_MAX || + !rc_validate_scancode(scan.rc_proto, scan.scancode)) + return -EINVAL; + + raw = kmalloc_array(LIRCBUF_SIZE, sizeof(*raw), GFP_KERNEL); + if (!raw) + return -ENOMEM; + + ret = ir_raw_encode_scancode(scan.rc_proto, scan.scancode, + raw, LIRCBUF_SIZE); + if (ret < 0) + goto out; + + count = ret; + + txbuf = kmalloc_array(count, sizeof(unsigned int), GFP_KERNEL); + if (!txbuf) { + ret = -ENOMEM; + goto out; + } + + for (i = 0; i < count; i++) + /* Convert from NS to US */ + txbuf[i] = DIV_ROUND_UP(raw[i].duration, 1000); + + if (dev->s_tx_carrier) { + int carrier = ir_raw_encode_carrier(scan.rc_proto); + + if (carrier > 0) + dev->s_tx_carrier(dev, carrier); + } + } else { + if (n < sizeof(unsigned int) || n % sizeof(unsigned int)) + return -EINVAL; + + count = n / sizeof(unsigned int); + if (count > LIRCBUF_SIZE || count % 2 == 0) + return -EINVAL; + + txbuf = memdup_user(buf, n); + if (IS_ERR(txbuf)) + return PTR_ERR(txbuf); + } + + for (i = 0; i < count; i++) { + if (txbuf[i] > IR_MAX_DURATION / 1000 - duration || !txbuf[i]) { + ret = -EINVAL; + goto out; + } + + duration += txbuf[i]; + } + + ret = dev->tx_ir(dev, txbuf, count); + if (ret < 0) + goto out; + + if (dev->send_mode == LIRC_MODE_SCANCODE) { + ret = n; + } else { + for (duration = i = 0; i < ret; i++) + duration += txbuf[i]; + + ret *= sizeof(unsigned int); + + /* + * The lircd gap calculation expects the write function to + * wait for the actual IR signal to be transmitted before + * returning. + */ + towait = ktime_us_delta(ktime_add_us(start, duration), + ktime_get()); + if (towait > 0) { + set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(usecs_to_jiffies(towait)); + } + } + +out: + kfree(txbuf); + kfree(raw); + return ret; +} + +static long ir_lirc_ioctl(struct file *filep, unsigned int cmd, + unsigned long arg) +{ + struct rc_dev *dev = filep->private_data; + u32 __user *argp = (u32 __user *)(arg); + int ret = 0; + __u32 val = 0, tmp; + + if (_IOC_DIR(cmd) & _IOC_WRITE) { + ret = get_user(val, argp); + if (ret) + return ret; + } + + if (!dev->registered) + return -ENODEV; + + switch (cmd) { + case LIRC_GET_FEATURES: + if (dev->driver_type == RC_DRIVER_SCANCODE) + val |= LIRC_CAN_REC_SCANCODE; + + if (dev->driver_type == RC_DRIVER_IR_RAW) { + val |= LIRC_CAN_REC_MODE2 | LIRC_CAN_REC_SCANCODE; + if (dev->rx_resolution) + val |= LIRC_CAN_GET_REC_RESOLUTION; + } + + if (dev->tx_ir) { + val |= LIRC_CAN_SEND_PULSE | LIRC_CAN_SEND_SCANCODE; + if (dev->s_tx_mask) + val |= LIRC_CAN_SET_TRANSMITTER_MASK; + if (dev->s_tx_carrier) + val |= LIRC_CAN_SET_SEND_CARRIER; + if (dev->s_tx_duty_cycle) + val |= LIRC_CAN_SET_SEND_DUTY_CYCLE; + } + + if (dev->s_rx_carrier_range) + val |= LIRC_CAN_SET_REC_CARRIER | + LIRC_CAN_SET_REC_CARRIER_RANGE; + + if (dev->s_learning_mode) + val |= LIRC_CAN_USE_WIDEBAND_RECEIVER; + + if (dev->s_carrier_report) + val |= LIRC_CAN_MEASURE_CARRIER; + + if (dev->max_timeout) + val |= LIRC_CAN_SET_REC_TIMEOUT; + + break; + + /* mode support */ + case LIRC_GET_REC_MODE: + if (dev->driver_type == RC_DRIVER_IR_RAW_TX) + return -ENOTTY; + + val = dev->rec_mode; + break; + + case LIRC_SET_REC_MODE: + switch (dev->driver_type) { + case RC_DRIVER_IR_RAW_TX: + return -ENOTTY; + case RC_DRIVER_SCANCODE: + if (val != LIRC_MODE_SCANCODE) + return -EINVAL; + break; + case RC_DRIVER_IR_RAW: + if (!(val == LIRC_MODE_MODE2 || + val == LIRC_MODE_SCANCODE)) + return -EINVAL; + break; + } + + dev->rec_mode = val; + return 0; + + case LIRC_GET_SEND_MODE: + if (!dev->tx_ir) + return -ENOTTY; + + val = dev->send_mode; + break; + + case LIRC_SET_SEND_MODE: + if (!dev->tx_ir) + return -ENOTTY; + + if (!(val == LIRC_MODE_PULSE || val == LIRC_MODE_SCANCODE)) + return -EINVAL; + + dev->send_mode = val; + return 0; + + /* TX settings */ + case LIRC_SET_TRANSMITTER_MASK: + if (!dev->s_tx_mask) + return -ENOTTY; + + return dev->s_tx_mask(dev, val); + + case LIRC_SET_SEND_CARRIER: + if (!dev->s_tx_carrier) + return -ENOTTY; + + return dev->s_tx_carrier(dev, val); + + case LIRC_SET_SEND_DUTY_CYCLE: + if (!dev->s_tx_duty_cycle) + return -ENOTTY; + + if (val <= 0 || val >= 100) + return -EINVAL; + + return dev->s_tx_duty_cycle(dev, val); + + /* RX settings */ + case LIRC_SET_REC_CARRIER: + if (!dev->s_rx_carrier_range) + return -ENOTTY; + + if (val <= 0) + return -EINVAL; + + return dev->s_rx_carrier_range(dev, + dev->carrier_low, + val); + + case LIRC_SET_REC_CARRIER_RANGE: + if (!dev->s_rx_carrier_range) + return -ENOTTY; + + if (val <= 0) + return -EINVAL; + + dev->carrier_low = val; + return 0; + + case LIRC_GET_REC_RESOLUTION: + if (!dev->rx_resolution) + return -ENOTTY; + + val = dev->rx_resolution / 1000; + break; + + case LIRC_SET_WIDEBAND_RECEIVER: + if (!dev->s_learning_mode) + return -ENOTTY; + + return dev->s_learning_mode(dev, !!val); + + case LIRC_SET_MEASURE_CARRIER_MODE: + if (!dev->s_carrier_report) + return -ENOTTY; + + return dev->s_carrier_report(dev, !!val); + + /* Generic timeout support */ + case LIRC_GET_MIN_TIMEOUT: + if (!dev->max_timeout) + return -ENOTTY; + val = DIV_ROUND_UP(dev->min_timeout, 1000); + break; + + case LIRC_GET_MAX_TIMEOUT: + if (!dev->max_timeout) + return -ENOTTY; + val = dev->max_timeout / 1000; + break; + + case LIRC_SET_REC_TIMEOUT: + if (!dev->max_timeout) + return -ENOTTY; + + /* Check for multiply overflow */ + if (val > U32_MAX / 1000) + return -EINVAL; + + tmp = val * 1000; + + if (tmp < dev->min_timeout || tmp > dev->max_timeout) + return -EINVAL; + + if (dev->s_timeout) + ret = dev->s_timeout(dev, tmp); + if (!ret) + dev->timeout = tmp; + break; + + case LIRC_SET_REC_TIMEOUT_REPORTS: + if (!dev->timeout) + return -ENOTTY; + + dev->send_timeout_reports = !!val; + break; + + default: + return -ENOTTY; + } + + if (_IOC_DIR(cmd) & _IOC_READ) + ret = put_user(val, argp); + + return ret; +} + +static unsigned int ir_lirc_poll(struct file *file, + struct poll_table_struct *wait) +{ + struct rc_dev *rcdev = file->private_data; + unsigned int events = 0; + + poll_wait(file, &rcdev->wait_poll, wait); + + if (!rcdev->registered) { + events = POLLHUP | POLLERR; + } else if (rcdev->driver_type != RC_DRIVER_IR_RAW_TX) { + if (rcdev->rec_mode == LIRC_MODE_SCANCODE && + !kfifo_is_empty(&rcdev->scancodes)) + events = POLLIN | POLLRDNORM; + + if (rcdev->rec_mode == LIRC_MODE_MODE2 && + !kfifo_is_empty(&rcdev->rawir)) + events = POLLIN | POLLRDNORM; + } + + return events; +} + +static ssize_t ir_lirc_read_mode2(struct file *file, char __user *buffer, + size_t length) +{ + struct rc_dev *rcdev = file->private_data; + unsigned int copied; + int ret; + + if (length < sizeof(unsigned int) || length % sizeof(unsigned int)) + return -EINVAL; + + do { + if (kfifo_is_empty(&rcdev->rawir)) { + if (file->f_flags & O_NONBLOCK) + return -EAGAIN; + + ret = wait_event_interruptible(rcdev->wait_poll, + !kfifo_is_empty(&rcdev->rawir) || + !rcdev->registered); + if (ret) + return ret; + } + + if (!rcdev->registered) + return -ENODEV; + + ret = mutex_lock_interruptible(&rcdev->lock); + if (ret) + return ret; + ret = kfifo_to_user(&rcdev->rawir, buffer, length, &copied); + mutex_unlock(&rcdev->lock); + if (ret) + return ret; + } while (copied == 0); + + return copied; +} + +static ssize_t ir_lirc_read_scancode(struct file *file, char __user *buffer, + size_t length) +{ + struct rc_dev *rcdev = file->private_data; + unsigned int copied; + int ret; + + if (length < sizeof(struct lirc_scancode) || + length % sizeof(struct lirc_scancode)) + return -EINVAL; + + do { + if (kfifo_is_empty(&rcdev->scancodes)) { + if (file->f_flags & O_NONBLOCK) + return -EAGAIN; + + ret = wait_event_interruptible(rcdev->wait_poll, + !kfifo_is_empty(&rcdev->scancodes) || + !rcdev->registered); + if (ret) + return ret; + } + + if (!rcdev->registered) + return -ENODEV; + + ret = mutex_lock_interruptible(&rcdev->lock); + if (ret) + return ret; + ret = kfifo_to_user(&rcdev->scancodes, buffer, length, &copied); + mutex_unlock(&rcdev->lock); + if (ret) + return ret; + } while (copied == 0); + + return copied; +} + +static ssize_t ir_lirc_read(struct file *file, char __user *buffer, + size_t length, loff_t *ppos) +{ + struct rc_dev *rcdev = file->private_data; + + if (rcdev->driver_type == RC_DRIVER_IR_RAW_TX) + return -EINVAL; + + if (!rcdev->registered) + return -ENODEV; + + if (rcdev->rec_mode == LIRC_MODE_MODE2) + return ir_lirc_read_mode2(file, buffer, length); + else /* LIRC_MODE_SCANCODE */ + return ir_lirc_read_scancode(file, buffer, length); +} + +static const struct file_operations lirc_fops = { + .owner = THIS_MODULE, + .write = ir_lirc_transmit_ir, + .unlocked_ioctl = ir_lirc_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl = ir_lirc_ioctl, +#endif + .read = ir_lirc_read, + .poll = ir_lirc_poll, + .open = ir_lirc_open, + .release = ir_lirc_close, + .llseek = no_llseek, +}; + static void lirc_release_device(struct device *ld) { struct rc_dev *rcdev = container_of(ld, struct rc_dev, lirc_dev); diff --git a/drivers/media/rc/rc-core-priv.h b/drivers/media/rc/rc-core-priv.h index 2a5e9cc3ddb3..915434855a63 100644 --- a/drivers/media/rc/rc-core-priv.h +++ b/drivers/media/rc/rc-core-priv.h @@ -279,8 +279,6 @@ void ir_lirc_raw_event(struct rc_dev *dev, struct ir_raw_event ev); void ir_lirc_scancode_event(struct rc_dev *dev, struct lirc_scancode *lsc); int ir_lirc_register(struct rc_dev *dev); void ir_lirc_unregister(struct rc_dev *dev); - -extern const struct file_operations lirc_fops; #else static inline int lirc_dev_init(void) { return 0; } static inline void lirc_dev_exit(void) {} |