diff options
Diffstat (limited to 'drivers/mfd')
-rw-r--r-- | drivers/mfd/Kconfig | 8 | ||||
-rw-r--r-- | drivers/mfd/Makefile | 1 | ||||
-rw-r--r-- | drivers/mfd/dm355evm_msp.c | 454 |
3 files changed, 0 insertions, 463 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 9e77f4762999..20613a5648c1 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -1460,14 +1460,6 @@ config MFD_TI_AM335X_TSCADC To compile this driver as a module, choose M here: the module will be called ti_am335x_tscadc. -config MFD_DM355EVM_MSP - bool "TI DaVinci DM355 EVM microcontroller" - depends on I2C=y && MACH_DAVINCI_DM355_EVM - help - This driver supports the MSP430 microcontroller used on these - boards. MSP430 firmware manages resets and power sequencing, - inputs from buttons and the IR remote, LEDs, an RTC, and more. - config MFD_LP3943 tristate "TI/National Semiconductor LP3943 MFD Driver" depends on I2C diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 9387c3ddab4e..6bfe2012e071 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -25,7 +25,6 @@ obj-$(CONFIG_MFD_TI_LP873X) += lp873x.o obj-$(CONFIG_MFD_TI_LP87565) += lp87565.o obj-$(CONFIG_MFD_DAVINCI_VOICECODEC) += davinci_voicecodec.o -obj-$(CONFIG_MFD_DM355EVM_MSP) += dm355evm_msp.o obj-$(CONFIG_MFD_TI_AM335X_TSCADC) += ti_am335x_tscadc.o obj-$(CONFIG_MFD_STA2X11) += sta2x11-mfd.o diff --git a/drivers/mfd/dm355evm_msp.c b/drivers/mfd/dm355evm_msp.c deleted file mode 100644 index 759c59690680..000000000000 --- a/drivers/mfd/dm355evm_msp.c +++ /dev/null @@ -1,454 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * dm355evm_msp.c - driver for MSP430 firmware on DM355EVM board - * - * Copyright (C) 2008 David Brownell - */ - -#include <linux/init.h> -#include <linux/mutex.h> -#include <linux/platform_device.h> -#include <linux/clk.h> -#include <linux/module.h> -#include <linux/err.h> -#include <linux/gpio.h> -#include <linux/gpio/machine.h> -#include <linux/leds.h> -#include <linux/i2c.h> -#include <linux/mfd/dm355evm_msp.h> - - -/* - * The DM355 is a DaVinci chip with video support but no C64+ DSP. Its - * EVM board has an MSP430 programmed with firmware for various board - * support functions. This driver exposes some of them directly, and - * supports other drivers (e.g. RTC, input) for more complex access. - * - * Because this firmware is entirely board-specific, this file embeds - * knowledge that would be passed as platform_data in a generic driver. - * - * This driver was tested with firmware revision A4. - */ - -#if IS_ENABLED(CONFIG_INPUT_DM355EVM) -#define msp_has_keyboard() true -#else -#define msp_has_keyboard() false -#endif - -#if IS_ENABLED(CONFIG_LEDS_GPIO) -#define msp_has_leds() true -#else -#define msp_has_leds() false -#endif - -#if IS_ENABLED(CONFIG_RTC_DRV_DM355EVM) -#define msp_has_rtc() true -#else -#define msp_has_rtc() false -#endif - -#if IS_ENABLED(CONFIG_VIDEO_TVP514X) -#define msp_has_tvp() true -#else -#define msp_has_tvp() false -#endif - - -/*----------------------------------------------------------------------*/ - -/* REVISIT for paranoia's sake, retry reads/writes on error */ - -static struct i2c_client *msp430; - -/** - * dm355evm_msp_write - Writes a register in dm355evm_msp - * @value: the value to be written - * @reg: register address - * - * Returns result of operation - 0 is success, else negative errno - */ -int dm355evm_msp_write(u8 value, u8 reg) -{ - return i2c_smbus_write_byte_data(msp430, reg, value); -} -EXPORT_SYMBOL(dm355evm_msp_write); - -/** - * dm355evm_msp_read - Reads a register from dm355evm_msp - * @reg: register address - * - * Returns result of operation - value, or negative errno - */ -int dm355evm_msp_read(u8 reg) -{ - return i2c_smbus_read_byte_data(msp430, reg); -} -EXPORT_SYMBOL(dm355evm_msp_read); - -/*----------------------------------------------------------------------*/ - -/* - * Many of the msp430 pins are just used as fixed-direction GPIOs. - * We could export a few more of them this way, if we wanted. - */ -#define MSP_GPIO(bit, reg) ((DM355EVM_MSP_ ## reg) << 3 | (bit)) - -static const u8 msp_gpios[] = { - /* eight leds */ - MSP_GPIO(0, LED), MSP_GPIO(1, LED), - MSP_GPIO(2, LED), MSP_GPIO(3, LED), - MSP_GPIO(4, LED), MSP_GPIO(5, LED), - MSP_GPIO(6, LED), MSP_GPIO(7, LED), - /* SW6 and the NTSC/nPAL jumper */ - MSP_GPIO(0, SWITCH1), MSP_GPIO(1, SWITCH1), - MSP_GPIO(2, SWITCH1), MSP_GPIO(3, SWITCH1), - MSP_GPIO(4, SWITCH1), - /* switches on MMC/SD sockets */ - /* - * Note: EVMDM355_ECP_VA4.pdf suggests that Bit 2 and 4 should be - * checked for card detection. However on the EVM bit 1 and 3 gives - * this status, for 0 and 1 instance respectively. The pdf also - * suggests that Bit 1 and 3 should be checked for write protection. - * However on the EVM bit 2 and 4 gives this status,for 0 and 1 - * instance respectively. - */ - MSP_GPIO(2, SDMMC), MSP_GPIO(1, SDMMC), /* mmc0 WP, nCD */ - MSP_GPIO(4, SDMMC), MSP_GPIO(3, SDMMC), /* mmc1 WP, nCD */ -}; - -static struct gpio_led evm_leds[] = { - { .name = "dm355evm::ds14", - .default_trigger = "heartbeat", }, - { .name = "dm355evm::ds15", - .default_trigger = "mmc0", }, - { .name = "dm355evm::ds16", - /* could also be a CE-ATA drive */ - .default_trigger = "mmc1", }, - { .name = "dm355evm::ds17", - .default_trigger = "nand-disk", }, - { .name = "dm355evm::ds18", }, - { .name = "dm355evm::ds19", }, - { .name = "dm355evm::ds20", }, - { .name = "dm355evm::ds21", }, -}; - -static struct gpio_led_platform_data evm_led_data = { - .num_leds = ARRAY_SIZE(evm_leds), - .leds = evm_leds, -}; - -static struct gpiod_lookup_table evm_leds_gpio_table = { - .dev_id = "leds-gpio", - .table = { - /* - * These GPIOs are on the dm355evm_msp - * GPIO chip at index 0..7 - */ - GPIO_LOOKUP_IDX("dm355evm_msp", 0, NULL, - 0, GPIO_ACTIVE_LOW), - GPIO_LOOKUP_IDX("dm355evm_msp", 1, NULL, - 1, GPIO_ACTIVE_LOW), - GPIO_LOOKUP_IDX("dm355evm_msp", 2, NULL, - 2, GPIO_ACTIVE_LOW), - GPIO_LOOKUP_IDX("dm355evm_msp", 3, NULL, - 3, GPIO_ACTIVE_LOW), - GPIO_LOOKUP_IDX("dm355evm_msp", 4, NULL, - 4, GPIO_ACTIVE_LOW), - GPIO_LOOKUP_IDX("dm355evm_msp", 5, NULL, - 5, GPIO_ACTIVE_LOW), - GPIO_LOOKUP_IDX("dm355evm_msp", 6, NULL, - 6, GPIO_ACTIVE_LOW), - GPIO_LOOKUP_IDX("dm355evm_msp", 7, NULL, - 7, GPIO_ACTIVE_LOW), - { }, - }, -}; - -#define MSP_GPIO_REG(offset) (msp_gpios[(offset)] >> 3) -#define MSP_GPIO_MASK(offset) BIT(msp_gpios[(offset)] & 0x07) - -static int msp_gpio_in(struct gpio_chip *chip, unsigned offset) -{ - switch (MSP_GPIO_REG(offset)) { - case DM355EVM_MSP_SWITCH1: - case DM355EVM_MSP_SWITCH2: - case DM355EVM_MSP_SDMMC: - return 0; - default: - return -EINVAL; - } -} - -static u8 msp_led_cache; - -static int msp_gpio_get(struct gpio_chip *chip, unsigned offset) -{ - int reg, status; - - reg = MSP_GPIO_REG(offset); - status = dm355evm_msp_read(reg); - if (status < 0) - return status; - if (reg == DM355EVM_MSP_LED) - msp_led_cache = status; - return !!(status & MSP_GPIO_MASK(offset)); -} - -static int msp_gpio_out(struct gpio_chip *chip, unsigned offset, int value) -{ - int mask, bits; - - /* NOTE: there are some other signals that could be - * packaged as output GPIOs, but they aren't as useful - * as the LEDs ... so for now we don't. - */ - if (MSP_GPIO_REG(offset) != DM355EVM_MSP_LED) - return -EINVAL; - - mask = MSP_GPIO_MASK(offset); - bits = msp_led_cache; - - bits &= ~mask; - if (value) - bits |= mask; - msp_led_cache = bits; - - return dm355evm_msp_write(bits, DM355EVM_MSP_LED); -} - -static void msp_gpio_set(struct gpio_chip *chip, unsigned offset, int value) -{ - msp_gpio_out(chip, offset, value); -} - -static struct gpio_chip dm355evm_msp_gpio = { - .label = "dm355evm_msp", - .owner = THIS_MODULE, - .direction_input = msp_gpio_in, - .get = msp_gpio_get, - .direction_output = msp_gpio_out, - .set = msp_gpio_set, - .base = -EINVAL, /* dynamic assignment */ - .ngpio = ARRAY_SIZE(msp_gpios), - .can_sleep = true, -}; - -/*----------------------------------------------------------------------*/ - -static struct device *add_child(struct i2c_client *client, const char *name, - void *pdata, unsigned pdata_len, - bool can_wakeup, int irq) -{ - struct platform_device *pdev; - int status; - - pdev = platform_device_alloc(name, -1); - if (!pdev) - return ERR_PTR(-ENOMEM); - - device_init_wakeup(&pdev->dev, can_wakeup); - pdev->dev.parent = &client->dev; - - if (pdata) { - status = platform_device_add_data(pdev, pdata, pdata_len); - if (status < 0) { - dev_dbg(&pdev->dev, "can't add platform_data\n"); - goto put_device; - } - } - - if (irq) { - struct resource r = { - .start = irq, - .flags = IORESOURCE_IRQ, - }; - - status = platform_device_add_resources(pdev, &r, 1); - if (status < 0) { - dev_dbg(&pdev->dev, "can't add irq\n"); - goto put_device; - } - } - - status = platform_device_add(pdev); - if (status) - goto put_device; - - return &pdev->dev; - -put_device: - platform_device_put(pdev); - dev_err(&client->dev, "failed to add device %s\n", name); - return ERR_PTR(status); -} - -static int add_children(struct i2c_client *client) -{ - static const struct { - int offset; - char *label; - } config_inputs[] = { - /* 8 == right after the LEDs */ - { 8 + 0, "sw6_1", }, - { 8 + 1, "sw6_2", }, - { 8 + 2, "sw6_3", }, - { 8 + 3, "sw6_4", }, - { 8 + 4, "NTSC/nPAL", }, - }; - - struct device *child; - int status; - int i; - - /* GPIO-ish stuff */ - dm355evm_msp_gpio.parent = &client->dev; - status = gpiochip_add_data(&dm355evm_msp_gpio, NULL); - if (status < 0) - return status; - - /* LED output */ - if (msp_has_leds()) { - gpiod_add_lookup_table(&evm_leds_gpio_table); - /* NOTE: these are the only fully programmable LEDs - * on the board, since GPIO-61/ds22 (and many signals - * going to DC7) must be used for AEMIF address lines - * unless the top 1 GB of NAND is unused... - */ - child = add_child(client, "leds-gpio", - &evm_led_data, sizeof(evm_led_data), - false, 0); - if (IS_ERR(child)) - return PTR_ERR(child); - } - - /* configuration inputs */ - for (i = 0; i < ARRAY_SIZE(config_inputs); i++) { - int gpio = dm355evm_msp_gpio.base + config_inputs[i].offset; - - gpio_request_one(gpio, GPIOF_IN, config_inputs[i].label); - - /* make it easy for userspace to see these */ - gpio_export(gpio, false); - } - - /* MMC/SD inputs -- right after the last config input */ - if (dev_get_platdata(&client->dev)) { - void (*mmcsd_setup)(unsigned) = dev_get_platdata(&client->dev); - - mmcsd_setup(dm355evm_msp_gpio.base + 8 + 5); - } - - /* RTC is a 32 bit counter, no alarm */ - if (msp_has_rtc()) { - child = add_child(client, "rtc-dm355evm", - NULL, 0, false, 0); - if (IS_ERR(child)) - return PTR_ERR(child); - } - - /* input from buttons and IR remote (uses the IRQ) */ - if (msp_has_keyboard()) { - child = add_child(client, "dm355evm_keys", - NULL, 0, true, client->irq); - if (IS_ERR(child)) - return PTR_ERR(child); - } - - return 0; -} - -/*----------------------------------------------------------------------*/ - -static void dm355evm_command(unsigned command) -{ - int status; - - status = dm355evm_msp_write(command, DM355EVM_MSP_COMMAND); - if (status < 0) - dev_err(&msp430->dev, "command %d failure %d\n", - command, status); -} - -static void dm355evm_power_off(void) -{ - dm355evm_command(MSP_COMMAND_POWEROFF); -} - -static void dm355evm_msp_remove(struct i2c_client *client) -{ - pm_power_off = NULL; - msp430 = NULL; -} - -static int -dm355evm_msp_probe(struct i2c_client *client, const struct i2c_device_id *id) -{ - int status; - const char *video = msp_has_tvp() ? "TVP5146" : "imager"; - - if (msp430) - return -EBUSY; - msp430 = client; - - /* display revision status; doubles as sanity check */ - status = dm355evm_msp_read(DM355EVM_MSP_FIRMREV); - if (status < 0) - goto fail; - dev_info(&client->dev, "firmware v.%02X, %s as video-in\n", - status, video); - - /* mux video input: either tvp5146 or some external imager */ - status = dm355evm_msp_write(msp_has_tvp() ? 0 : MSP_VIDEO_IMAGER, - DM355EVM_MSP_VIDEO_IN); - if (status < 0) - dev_warn(&client->dev, "error %d muxing %s as video-in\n", - status, video); - - /* init LED cache, and turn off the LEDs */ - msp_led_cache = 0xff; - dm355evm_msp_write(msp_led_cache, DM355EVM_MSP_LED); - - /* export capabilities we support */ - status = add_children(client); - if (status < 0) - goto fail; - - /* PM hookup */ - pm_power_off = dm355evm_power_off; - - return 0; - -fail: - /* FIXME remove children ... */ - dm355evm_msp_remove(client); - return status; -} - -static const struct i2c_device_id dm355evm_msp_ids[] = { - { "dm355evm_msp", 0 }, - { /* end of list */ }, -}; -MODULE_DEVICE_TABLE(i2c, dm355evm_msp_ids); - -static struct i2c_driver dm355evm_msp_driver = { - .driver.name = "dm355evm_msp", - .id_table = dm355evm_msp_ids, - .probe = dm355evm_msp_probe, - .remove = dm355evm_msp_remove, -}; - -static int __init dm355evm_msp_init(void) -{ - return i2c_add_driver(&dm355evm_msp_driver); -} -subsys_initcall(dm355evm_msp_init); - -static void __exit dm355evm_msp_exit(void) -{ - i2c_del_driver(&dm355evm_msp_driver); -} -module_exit(dm355evm_msp_exit); - -MODULE_DESCRIPTION("Interface to MSP430 firmware on DM355EVM"); -MODULE_LICENSE("GPL"); |