[linux.git] / drivers / mfd / dm355evm_msp.c

/*
 * dm355evm_msp.c - driver for MSP430 firmware on DM355EVM board
 *
 * Copyright (C) 2008 David Brownell
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 */

#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/leds.h>
#include <linux/i2c.h>
#include <linux/i2c/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 defined(CONFIG_INPUT_DM355EVM) || defined(CONFIG_INPUT_DM355EVM_MODULE)
#define msp_has_keyboard()	true
#else
#define msp_has_keyboard()	false
#endif

#if defined(CONFIG_LEDS_GPIO) || defined(CONFIG_LEDS_GPIO_MODULE)
#define msp_has_leds()		true
#else
#define msp_has_leds()		false
#endif

#if defined(CONFIG_RTC_DRV_DM355EVM) || defined(CONFIG_RTC_DRV_DM355EVM_MODULE)
#define msp_has_rtc()		true
#else
#define msp_has_rtc()		false
#endif

#if defined(CONFIG_VIDEO_TVP514X) || defined(CONFIG_VIDEO_TVP514X_MODULE)
#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 */
};

#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) {
		dev_dbg(&client->dev, "can't alloc dev\n");
		status = -ENOMEM;
		goto err;
	}

	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 err;
		}
	}

	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 err;
		}
	}

	status = platform_device_add(pdev);

err:
	if (status < 0) {
		platform_device_put(pdev);
		dev_err(&client->dev, "can't add %s dev\n", name);
		return ERR_PTR(status);
	}
	return &pdev->dev;
}

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.dev = &client->dev;
	status = gpiochip_add(&dm355evm_msp_gpio);
	if (status < 0)
		return status;

	/* LED output */
	if (msp_has_leds()) {
#define GPIO_LED(l)	.name = l, .active_low = true
		static struct gpio_led evm_leds[] = {
			{ GPIO_LED("dm355evm::ds14"),
				.default_trigger = "heartbeat", },
			{ GPIO_LED("dm355evm::ds15"),
				.default_trigger = "mmc0", },
			{ GPIO_LED("dm355evm::ds16"),
				/* could also be a CE-ATA drive */
				.default_trigger = "mmc1", },
			{ GPIO_LED("dm355evm::ds17"),
				.default_trigger = "nand-disk", },
			{ GPIO_LED("dm355evm::ds18"), },
			{ GPIO_LED("dm355evm::ds19"), },
			{ GPIO_LED("dm355evm::ds20"), },
			{ GPIO_LED("dm355evm::ds21"), },
		};
#undef GPIO_LED

		struct gpio_led_platform_data evm_led_data = {
			.num_leds	= ARRAY_SIZE(evm_leds),
			.leds		= evm_leds,
		};

		for (i = 0; i < ARRAY_SIZE(evm_leds); i++)
			evm_leds[i].gpio = i + dm355evm_msp_gpio.base;

		/* 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 (client->dev.platform_data) {
		void (*mmcsd_setup)(unsigned) = client->dev.platform_data;

		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 int dm355evm_msp_remove(struct i2c_client *client)
{
	pm_power_off = NULL;
	msp430 = NULL;
	return 0;
}

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");
Commit	Line	Data
0931a4c6 DB	1	/*
	2	* dm355evm_msp.c - driver for MSP430 firmware on DM355EVM board
	3	*
	4	* Copyright (C) 2008 David Brownell
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*/
	11
	12	#include <linux/init.h>
	13	#include <linux/mutex.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/clk.h>
4e36dd33	16	#include <linux/module.h>
0931a4c6 DB	17	#include <linux/err.h>
	18	#include <linux/gpio.h>
	19	#include <linux/leds.h>
	20	#include <linux/i2c.h>
	21	#include <linux/i2c/dm355evm_msp.h>
	22
	23
	24	/*
	25	* The DM355 is a DaVinci chip with video support but no C64+ DSP. Its
	26	* EVM board has an MSP430 programmed with firmware for various board
	27	* support functions. This driver exposes some of them directly, and
	28	* supports other drivers (e.g. RTC, input) for more complex access.
	29	*
	30	* Because this firmware is entirely board-specific, this file embeds
	31	* knowledge that would be passed as platform_data in a generic driver.
	32	*
	33	* This driver was tested with firmware revision A4.
	34	*/
	35
00b8ac40	36	#if defined(CONFIG_INPUT_DM355EVM) \|\| defined(CONFIG_INPUT_DM355EVM_MODULE)
0931a4c6 DB	37	#define msp_has_keyboard() true
	38	#else
	39	#define msp_has_keyboard() false
	40	#endif
	41
	42	#if defined(CONFIG_LEDS_GPIO) \|\| defined(CONFIG_LEDS_GPIO_MODULE)
	43	#define msp_has_leds() true
	44	#else
	45	#define msp_has_leds() false
	46	#endif
	47
	48	#if defined(CONFIG_RTC_DRV_DM355EVM) \|\| defined(CONFIG_RTC_DRV_DM355EVM_MODULE)
	49	#define msp_has_rtc() true
	50	#else
	51	#define msp_has_rtc() false
	52	#endif
	53
	54	#if defined(CONFIG_VIDEO_TVP514X) \|\| defined(CONFIG_VIDEO_TVP514X_MODULE)
	55	#define msp_has_tvp() true
	56	#else
	57	#define msp_has_tvp() false
	58	#endif
	59
	60
	61	/----------------------------------------------------------------------/
	62
	63	/* REVISIT for paranoia's sake, retry reads/writes on error */
	64
	65	static struct i2c_client *msp430;
	66
	67	/**
	68	* dm355evm_msp_write - Writes a register in dm355evm_msp
	69	* @value: the value to be written
	70	* @reg: register address
	71	*
	72	* Returns result of operation - 0 is success, else negative errno
	73	*/
	74	int dm355evm_msp_write(u8 value, u8 reg)
	75	{
	76	return i2c_smbus_write_byte_data(msp430, reg, value);
	77	}
	78	EXPORT_SYMBOL(dm355evm_msp_write);
	79
	80	/**
	81	* dm355evm_msp_read - Reads a register from dm355evm_msp
	82	* @reg: register address
	83	*
	84	* Returns result of operation - value, or negative errno
	85	*/
	86	int dm355evm_msp_read(u8 reg)
	87	{
	88	return i2c_smbus_read_byte_data(msp430, reg);
	89	}
	90	EXPORT_SYMBOL(dm355evm_msp_read);
	91
	92	/----------------------------------------------------------------------/
	93
	94	/*
	95	* Many of the msp430 pins are just used as fixed-direction GPIOs.
	96	* We could export a few more of them this way, if we wanted.
	97	*/
	98	#define MSP_GPIO(bit,reg) ((DM355EVM_MSP_ ## reg) << 3 \| (bit))
	99
	100	static const u8 msp_gpios[] = {
101	/* eight leds */
102	MSP_GPIO(0, LED), MSP_GPIO(1, LED),
103	MSP_GPIO(2, LED), MSP_GPIO(3, LED),
104	MSP_GPIO(4, LED), MSP_GPIO(5, LED),
105	MSP_GPIO(6, LED), MSP_GPIO(7, LED),
106	/* SW6 and the NTSC/nPAL jumper */
107	MSP_GPIO(0, SWITCH1), MSP_GPIO(1, SWITCH1),
108	MSP_GPIO(2, SWITCH1), MSP_GPIO(3, SWITCH1),
109	MSP_GPIO(4, SWITCH1),
d1fdb4f6	110	/* switches on MMC/SD sockets */
89a99e76 VB	111	/*
	112	* Note: EVMDM355_ECP_VA4.pdf suggests that Bit 2 and 4 should be
	113	* checked for card detection. However on the EVM bit 1 and 3 gives
	114	* this status, for 0 and 1 instance respectively. The pdf also
	115	* suggests that Bit 1 and 3 should be checked for write protection.
	116	* However on the EVM bit 2 and 4 gives this status,for 0 and 1
	117	* instance respectively.
	118	*/
	119	MSP_GPIO(2, SDMMC), MSP_GPIO(1, SDMMC), /* mmc0 WP, nCD */
	120	MSP_GPIO(4, SDMMC), MSP_GPIO(3, SDMMC), /* mmc1 WP, nCD */
0931a4c6 DB	121	};
	122
	123	#define MSP_GPIO_REG(offset) (msp_gpios[(offset)] >> 3)
	124	#define MSP_GPIO_MASK(offset) BIT(msp_gpios[(offset)] & 0x07)
	125
	126	static int msp_gpio_in(struct gpio_chip *chip, unsigned offset)
	127	{
	128	switch (MSP_GPIO_REG(offset)) {
	129	case DM355EVM_MSP_SWITCH1:
	130	case DM355EVM_MSP_SWITCH2:
	131	case DM355EVM_MSP_SDMMC:
	132	return 0;
	133	default:
	134	return -EINVAL;
	135	}
	136	}
	137
	138	static u8 msp_led_cache;
	139
	140	static int msp_gpio_get(struct gpio_chip *chip, unsigned offset)
	141	{
	142	int reg, status;
	143
	144	reg = MSP_GPIO_REG(offset);
	145	status = dm355evm_msp_read(reg);
	146	if (status < 0)
	147	return status;
	148	if (reg == DM355EVM_MSP_LED)
	149	msp_led_cache = status;
	150	return status & MSP_GPIO_MASK(offset);
	151	}
	152
	153	static int msp_gpio_out(struct gpio_chip *chip, unsigned offset, int value)
	154	{
	155	int mask, bits;
	156
	157	/* NOTE: there are some other signals that could be
	158	* packaged as output GPIOs, but they aren't as useful
	159	* as the LEDs ... so for now we don't.
	160	*/
	161	if (MSP_GPIO_REG(offset) != DM355EVM_MSP_LED)
	162	return -EINVAL;
	163
	164	mask = MSP_GPIO_MASK(offset);
	165	bits = msp_led_cache;
	166
	167	bits &= ~mask;
	168	if (value)
	169	bits \|= mask;
	170	msp_led_cache = bits;
	171
	172	return dm355evm_msp_write(bits, DM355EVM_MSP_LED);
	173	}
	174
	175	static void msp_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
	176	{
	177	msp_gpio_out(chip, offset, value);
	178	}
	179
	180	static struct gpio_chip dm355evm_msp_gpio = {
	181	.label = "dm355evm_msp",
	182	.owner = THIS_MODULE,
	183	.direction_input = msp_gpio_in,
	184	.get = msp_gpio_get,
185	.direction_output = msp_gpio_out,
186	.set = msp_gpio_set,
187	.base = -EINVAL, /* dynamic assignment */
188	.ngpio = ARRAY_SIZE(msp_gpios),
189	.can_sleep = true,
190	};
191
192	/----------------------------------------------------------------------/
193
194	static struct device add_child(struct i2c_client client, const char *name,
195	void *pdata, unsigned pdata_len,
196	bool can_wakeup, int irq)
197	{
198	struct platform_device *pdev;
199	int status;
200
201	pdev = platform_device_alloc(name, -1);
202	if (!pdev) {
203	dev_dbg(&client->dev, "can't alloc dev\n");
204	status = -ENOMEM;
205	goto err;
206	}
207
208	device_init_wakeup(&pdev->dev, can_wakeup);
209	pdev->dev.parent = &client->dev;
210
211	if (pdata) {
212	status = platform_device_add_data(pdev, pdata, pdata_len);
213	if (status < 0) {
214	dev_dbg(&pdev->dev, "can't add platform_data\n");
215	goto err;
216	}
217	}
218
219	if (irq) {
220	struct resource r = {
221	.start = irq,
222	.flags = IORESOURCE_IRQ,
223	};
224
225	status = platform_device_add_resources(pdev, &r, 1);
226	if (status < 0) {
227	dev_dbg(&pdev->dev, "can't add irq\n");
228	goto err;
229	}
230	}
231
232	status = platform_device_add(pdev);
233
234	err:
235	if (status < 0) {
236	platform_device_put(pdev);
237	dev_err(&client->dev, "can't add %s dev\n", name);
238	return ERR_PTR(status);
239	}
240	return &pdev->dev;
241	}
242
243	static int add_children(struct i2c_client *client)
244	{
245	static const struct {
246	int offset;
247	char *label;
248	} config_inputs[] = {
249	/* 8 == right after the LEDs */
250	{ 8 + 0, "sw6_1", },
251	{ 8 + 1, "sw6_2", },
252	{ 8 + 2, "sw6_3", },
253	{ 8 + 3, "sw6_4", },
254	{ 8 + 4, "NTSC/nPAL", },
255	};
256
257	struct device *child;
258	int status;
259	int i;
260
261	/* GPIO-ish stuff */
262	dm355evm_msp_gpio.dev = &client->dev;
263	status = gpiochip_add(&dm355evm_msp_gpio);
264	if (status < 0)
265	return status;
266
267	/* LED output */
268	if (msp_has_leds()) {
269	#define GPIO_LED(l) .name = l, .active_low = true
270	static struct gpio_led evm_leds[] = {
271	{ GPIO_LED("dm355evm::ds14"),
272	.default_trigger = "heartbeat", },
273	{ GPIO_LED("dm355evm::ds15"),
274	.default_trigger = "mmc0", },
275	{ GPIO_LED("dm355evm::ds16"),
276	/* could also be a CE-ATA drive */
277	.default_trigger = "mmc1", },
278	{ GPIO_LED("dm355evm::ds17"),
279	.default_trigger = "nand-disk", },
280	{ GPIO_LED("dm355evm::ds18"), },
281	{ GPIO_LED("dm355evm::ds19"), },
282	{ GPIO_LED("dm355evm::ds20"), },
283	{ GPIO_LED("dm355evm::ds21"), },
284	};
285	#undef GPIO_LED
286
287	struct gpio_led_platform_data evm_led_data = {
288	.num_leds = ARRAY_SIZE(evm_leds),
289	.leds = evm_leds,
290	};
291
292	for (i = 0; i < ARRAY_SIZE(evm_leds); i++)
293	evm_leds[i].gpio = i + dm355evm_msp_gpio.base;
294
295	/* NOTE: these are the only fully programmable LEDs
296	* on the board, since GPIO-61/ds22 (and many signals
297	* going to DC7) must be used for AEMIF address lines
298	* unless the top 1 GB of NAND is unused...
299	*/
300	child = add_child(client, "leds-gpio",
301	&evm_led_data, sizeof(evm_led_data),
302	false, 0);
303	if (IS_ERR(child))
304	return PTR_ERR(child);
305	}
306
307	/* configuration inputs */
308	for (i = 0; i < ARRAY_SIZE(config_inputs); i++) {
309	int gpio = dm355evm_msp_gpio.base + config_inputs[i].offset;
310
97f2bf51	311	gpio_request_one(gpio, GPIOF_IN, config_inputs[i].label);
0931a4c6 DB	312
	313	/* make it easy for userspace to see these */
	314	gpio_export(gpio, false);
	315	}
	316
d1fdb4f6 DB	317	/* MMC/SD inputs -- right after the last config input */
	318	if (client->dev.platform_data) {
	319	void (*mmcsd_setup)(unsigned) = client->dev.platform_data;
	320
	321	mmcsd_setup(dm355evm_msp_gpio.base + 8 + 5);
	322	}
	323
0931a4c6 DB	324	/* RTC is a 32 bit counter, no alarm */
	325	if (msp_has_rtc()) {
	326	child = add_child(client, "rtc-dm355evm",
	327	NULL, 0, false, 0);
	328	if (IS_ERR(child))
	329	return PTR_ERR(child);
	330	}
	331
	332	/* input from buttons and IR remote (uses the IRQ) */
	333	if (msp_has_keyboard()) {
	334	child = add_child(client, "dm355evm_keys",
	335	NULL, 0, true, client->irq);
	336	if (IS_ERR(child))
	337	return PTR_ERR(child);
	338	}
	339
	340	return 0;
	341	}
	342
	343	/----------------------------------------------------------------------/
	344
	345	static void dm355evm_command(unsigned command)
	346	{
	347	int status;
	348
	349	status = dm355evm_msp_write(command, DM355EVM_MSP_COMMAND);
	350	if (status < 0)
	351	dev_err(&msp430->dev, "command %d failure %d\n",
	352	command, status);
	353	}
	354
	355	static void dm355evm_power_off(void)
	356	{
	357	dm355evm_command(MSP_COMMAND_POWEROFF);
	358	}
	359
	360	static int dm355evm_msp_remove(struct i2c_client *client)
	361	{
	362	pm_power_off = NULL;
	363	msp430 = NULL;
	364	return 0;
	365	}
	366
	367	static int
	368	dm355evm_msp_probe(struct i2c_client client, const struct i2c_device_id id)
	369	{
	370	int status;
	371	const char *video = msp_has_tvp() ? "TVP5146" : "imager";
	372
	373	if (msp430)
	374	return -EBUSY;
	375	msp430 = client;
	376
	377	/* display revision status; doubles as sanity check */
	378	status = dm355evm_msp_read(DM355EVM_MSP_FIRMREV);
	379	if (status < 0)
	380	goto fail;
	381	dev_info(&client->dev, "firmware v.%02X, %s as video-in\n",
	382	status, video);
	383
	384	/* mux video input: either tvp5146 or some external imager */
	385	status = dm355evm_msp_write(msp_has_tvp() ? 0 : MSP_VIDEO_IMAGER,
	386	DM355EVM_MSP_VIDEO_IN);
	387	if (status < 0)
388	dev_warn(&client->dev, "error %d muxing %s as video-in\n",
389	status, video);
390
391	/* init LED cache, and turn off the LEDs */
392	msp_led_cache = 0xff;
393	dm355evm_msp_write(msp_led_cache, DM355EVM_MSP_LED);
394
395	/* export capabilities we support */
396	status = add_children(client);
397	if (status < 0)
398	goto fail;
399
400	/* PM hookup */
401	pm_power_off = dm355evm_power_off;
402
403	return 0;
404
405	fail:
406	/* FIXME remove children ... */
407	dm355evm_msp_remove(client);
408	return status;
409	}
410
411	static const struct i2c_device_id dm355evm_msp_ids[] = {
412	{ "dm355evm_msp", 0 },
413	{ /* end of list */ },
414	};
415	MODULE_DEVICE_TABLE(i2c, dm355evm_msp_ids);
416
417	static struct i2c_driver dm355evm_msp_driver = {
418	.driver.name = "dm355evm_msp",
419	.id_table = dm355evm_msp_ids,
420	.probe = dm355evm_msp_probe,
421	.remove = dm355evm_msp_remove,
422	};
423
424	static int __init dm355evm_msp_init(void)
425	{
426	return i2c_add_driver(&dm355evm_msp_driver);
427	}
428	subsys_initcall(dm355evm_msp_init);
429
430	static void __exit dm355evm_msp_exit(void)
431	{
432	i2c_del_driver(&dm355evm_msp_driver);
433	}
434	module_exit(dm355evm_msp_exit);
435
436	MODULE_DESCRIPTION("Interface to MSP430 firmware on DM355EVM");
437	MODULE_LICENSE("GPL");