[linux-block.git] / drivers / media / i2c / lm3560.c

/*
 * drivers/media/i2c/lm3560.c
 * General device driver for TI lm3559, lm3560, FLASH LED Driver
 *
 * Copyright (C) 2013 Texas Instruments
 *
 * Contact: Daniel Jeong <gshark.jeong@gmail.com>
 *			Ldd-Mlp <ldd-mlp@list.ti.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * 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/delay.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/regmap.h>
#include <linux/videodev2.h>
#include <media/i2c/lm3560.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>

/* registers definitions */
#define REG_ENABLE		0x10
#define REG_TORCH_BR	0xa0
#define REG_FLASH_BR	0xb0
#define REG_FLASH_TOUT	0xc0
#define REG_FLAG		0xd0
#define REG_CONFIG1		0xe0

/* fault mask */
#define FAULT_TIMEOUT	(1<<0)
#define FAULT_OVERTEMP	(1<<1)
#define FAULT_SHORT_CIRCUIT	(1<<2)

enum led_enable {
	MODE_SHDN = 0x0,
	MODE_TORCH = 0x2,
	MODE_FLASH = 0x3,
};

/**
 * struct lm3560_flash
 *
 * @dev: pointer to &struct device
 * @pdata: platform data
 * @regmap: reg. map for i2c
 * @lock: muxtex for serial access.
 * @led_mode: V4L2 LED mode
 * @ctrls_led: V4L2 contols
 * @subdev_led: V4L2 subdev
 */
struct lm3560_flash {
	struct device *dev;
	struct lm3560_platform_data *pdata;
	struct regmap *regmap;
	struct mutex lock;

	enum v4l2_flash_led_mode led_mode;
	struct v4l2_ctrl_handler ctrls_led[LM3560_LED_MAX];
	struct v4l2_subdev subdev_led[LM3560_LED_MAX];
};

#define to_lm3560_flash(_ctrl, _no)	\
	container_of(_ctrl->handler, struct lm3560_flash, ctrls_led[_no])

/* enable mode control */
static int lm3560_mode_ctrl(struct lm3560_flash *flash)
{
	int rval = -EINVAL;

	switch (flash->led_mode) {
	case V4L2_FLASH_LED_MODE_NONE:
		rval = regmap_update_bits(flash->regmap,
					  REG_ENABLE, 0x03, MODE_SHDN);
		break;
	case V4L2_FLASH_LED_MODE_TORCH:
		rval = regmap_update_bits(flash->regmap,
					  REG_ENABLE, 0x03, MODE_TORCH);
		break;
	case V4L2_FLASH_LED_MODE_FLASH:
		rval = regmap_update_bits(flash->regmap,
					  REG_ENABLE, 0x03, MODE_FLASH);
		break;
	}
	return rval;
}

/* led1/2 enable/disable */
static int lm3560_enable_ctrl(struct lm3560_flash *flash,
			      enum lm3560_led_id led_no, bool on)
{
	int rval;

	if (led_no == LM3560_LED0) {
		if (on)
			rval = regmap_update_bits(flash->regmap,
						  REG_ENABLE, 0x08, 0x08);
		else
			rval = regmap_update_bits(flash->regmap,
						  REG_ENABLE, 0x08, 0x00);
	} else {
		if (on)
			rval = regmap_update_bits(flash->regmap,
						  REG_ENABLE, 0x10, 0x10);
		else
			rval = regmap_update_bits(flash->regmap,
						  REG_ENABLE, 0x10, 0x00);
	}
	return rval;
}

/* torch1/2 brightness control */
static int lm3560_torch_brt_ctrl(struct lm3560_flash *flash,
				 enum lm3560_led_id led_no, unsigned int brt)
{
	int rval;
	u8 br_bits;

	if (brt < LM3560_TORCH_BRT_MIN)
		return lm3560_enable_ctrl(flash, led_no, false);
	else
		rval = lm3560_enable_ctrl(flash, led_no, true);

	br_bits = LM3560_TORCH_BRT_uA_TO_REG(brt);
	if (led_no == LM3560_LED0)
		rval = regmap_update_bits(flash->regmap,
					  REG_TORCH_BR, 0x07, br_bits);
	else
		rval = regmap_update_bits(flash->regmap,
					  REG_TORCH_BR, 0x38, br_bits << 3);

	return rval;
}

/* flash1/2 brightness control */
static int lm3560_flash_brt_ctrl(struct lm3560_flash *flash,
				 enum lm3560_led_id led_no, unsigned int brt)
{
	int rval;
	u8 br_bits;

	if (brt < LM3560_FLASH_BRT_MIN)
		return lm3560_enable_ctrl(flash, led_no, false);
	else
		rval = lm3560_enable_ctrl(flash, led_no, true);

	br_bits = LM3560_FLASH_BRT_uA_TO_REG(brt);
	if (led_no == LM3560_LED0)
		rval = regmap_update_bits(flash->regmap,
					  REG_FLASH_BR, 0x0f, br_bits);
	else
		rval = regmap_update_bits(flash->regmap,
					  REG_FLASH_BR, 0xf0, br_bits << 4);

	return rval;
}

/* v4l2 controls  */
static int lm3560_get_ctrl(struct v4l2_ctrl *ctrl, enum lm3560_led_id led_no)
{
	struct lm3560_flash *flash = to_lm3560_flash(ctrl, led_no);
	int rval = -EINVAL;

	mutex_lock(&flash->lock);

	if (ctrl->id == V4L2_CID_FLASH_FAULT) {
		s32 fault = 0;
		unsigned int reg_val;
		rval = regmap_read(flash->regmap, REG_FLAG, &reg_val);
		if (rval < 0)
			goto out;
		if (reg_val & FAULT_SHORT_CIRCUIT)
			fault |= V4L2_FLASH_FAULT_SHORT_CIRCUIT;
		if (reg_val & FAULT_OVERTEMP)
			fault |= V4L2_FLASH_FAULT_OVER_TEMPERATURE;
		if (reg_val & FAULT_TIMEOUT)
			fault |= V4L2_FLASH_FAULT_TIMEOUT;
		ctrl->cur.val = fault;
	}

out:
	mutex_unlock(&flash->lock);
	return rval;
}

static int lm3560_set_ctrl(struct v4l2_ctrl *ctrl, enum lm3560_led_id led_no)
{
	struct lm3560_flash *flash = to_lm3560_flash(ctrl, led_no);
	u8 tout_bits;
	int rval = -EINVAL;

	mutex_lock(&flash->lock);

	switch (ctrl->id) {
	case V4L2_CID_FLASH_LED_MODE:
		flash->led_mode = ctrl->val;
		if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH)
			rval = lm3560_mode_ctrl(flash);
		break;

	case V4L2_CID_FLASH_STROBE_SOURCE:
		rval = regmap_update_bits(flash->regmap,
					  REG_CONFIG1, 0x04, (ctrl->val) << 2);
		if (rval < 0)
			goto err_out;
		break;

	case V4L2_CID_FLASH_STROBE:
		if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH) {
			rval = -EBUSY;
			goto err_out;
		}
		flash->led_mode = V4L2_FLASH_LED_MODE_FLASH;
		rval = lm3560_mode_ctrl(flash);
		break;

	case V4L2_CID_FLASH_STROBE_STOP:
		if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH) {
			rval = -EBUSY;
			goto err_out;
		}
		flash->led_mode = V4L2_FLASH_LED_MODE_NONE;
		rval = lm3560_mode_ctrl(flash);
		break;

	case V4L2_CID_FLASH_TIMEOUT:
		tout_bits = LM3560_FLASH_TOUT_ms_TO_REG(ctrl->val);
		rval = regmap_update_bits(flash->regmap,
					  REG_FLASH_TOUT, 0x1f, tout_bits);
		break;

	case V4L2_CID_FLASH_INTENSITY:
		rval = lm3560_flash_brt_ctrl(flash, led_no, ctrl->val);
		break;

	case V4L2_CID_FLASH_TORCH_INTENSITY:
		rval = lm3560_torch_brt_ctrl(flash, led_no, ctrl->val);
		break;
	}

err_out:
	mutex_unlock(&flash->lock);
	return rval;
}

static int lm3560_led1_get_ctrl(struct v4l2_ctrl *ctrl)
{
	return lm3560_get_ctrl(ctrl, LM3560_LED1);
}

static int lm3560_led1_set_ctrl(struct v4l2_ctrl *ctrl)
{
	return lm3560_set_ctrl(ctrl, LM3560_LED1);
}

static int lm3560_led0_get_ctrl(struct v4l2_ctrl *ctrl)
{
	return lm3560_get_ctrl(ctrl, LM3560_LED0);
}

static int lm3560_led0_set_ctrl(struct v4l2_ctrl *ctrl)
{
	return lm3560_set_ctrl(ctrl, LM3560_LED0);
}

static const struct v4l2_ctrl_ops lm3560_led_ctrl_ops[LM3560_LED_MAX] = {
	[LM3560_LED0] = {
			 .g_volatile_ctrl = lm3560_led0_get_ctrl,
			 .s_ctrl = lm3560_led0_set_ctrl,
			 },
	[LM3560_LED1] = {
			 .g_volatile_ctrl = lm3560_led1_get_ctrl,
			 .s_ctrl = lm3560_led1_set_ctrl,
			 }
};

static int lm3560_init_controls(struct lm3560_flash *flash,
				enum lm3560_led_id led_no)
{
	struct v4l2_ctrl *fault;
	u32 max_flash_brt = flash->pdata->max_flash_brt[led_no];
	u32 max_torch_brt = flash->pdata->max_torch_brt[led_no];
	struct v4l2_ctrl_handler *hdl = &flash->ctrls_led[led_no];
	const struct v4l2_ctrl_ops *ops = &lm3560_led_ctrl_ops[led_no];

	v4l2_ctrl_handler_init(hdl, 8);

	/* flash mode */
	v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_FLASH_LED_MODE,
			       V4L2_FLASH_LED_MODE_TORCH, ~0x7,
			       V4L2_FLASH_LED_MODE_NONE);
	flash->led_mode = V4L2_FLASH_LED_MODE_NONE;

	/* flash source */
	v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_FLASH_STROBE_SOURCE,
			       0x1, ~0x3, V4L2_FLASH_STROBE_SOURCE_SOFTWARE);

	/* flash strobe */
	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_STROBE, 0, 0, 0, 0);

	/* flash strobe stop */
	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_STROBE_STOP, 0, 0, 0, 0);

	/* flash strobe timeout */
	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_TIMEOUT,
			  LM3560_FLASH_TOUT_MIN,
			  flash->pdata->max_flash_timeout,
			  LM3560_FLASH_TOUT_STEP,
			  flash->pdata->max_flash_timeout);

	/* flash brt */
	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_INTENSITY,
			  LM3560_FLASH_BRT_MIN, max_flash_brt,
			  LM3560_FLASH_BRT_STEP, max_flash_brt);

	/* torch brt */
	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_TORCH_INTENSITY,
			  LM3560_TORCH_BRT_MIN, max_torch_brt,
			  LM3560_TORCH_BRT_STEP, max_torch_brt);

	/* fault */
	fault = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_FAULT, 0,
				  V4L2_FLASH_FAULT_OVER_VOLTAGE
				  | V4L2_FLASH_FAULT_OVER_TEMPERATURE
				  | V4L2_FLASH_FAULT_SHORT_CIRCUIT
				  | V4L2_FLASH_FAULT_TIMEOUT, 0, 0);
	if (fault != NULL)
		fault->flags |= V4L2_CTRL_FLAG_VOLATILE;

	if (hdl->error)
		return hdl->error;

	flash->subdev_led[led_no].ctrl_handler = hdl;
	return 0;
}

/* initialize device */
static const struct v4l2_subdev_ops lm3560_ops = {
	.core = NULL,
};

static const struct regmap_config lm3560_regmap = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = 0xFF,
};

static int lm3560_subdev_init(struct lm3560_flash *flash,
			      enum lm3560_led_id led_no, char *led_name)
{
	struct i2c_client *client = to_i2c_client(flash->dev);
	int rval;

	v4l2_i2c_subdev_init(&flash->subdev_led[led_no], client, &lm3560_ops);
	flash->subdev_led[led_no].flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
	strscpy(flash->subdev_led[led_no].name, led_name,
		sizeof(flash->subdev_led[led_no].name));
	rval = lm3560_init_controls(flash, led_no);
	if (rval)
		goto err_out;
	rval = media_entity_pads_init(&flash->subdev_led[led_no].entity, 0, NULL);
	if (rval < 0)
		goto err_out;
	flash->subdev_led[led_no].entity.function = MEDIA_ENT_F_FLASH;

	return rval;

err_out:
	v4l2_ctrl_handler_free(&flash->ctrls_led[led_no]);
	return rval;
}

static int lm3560_init_device(struct lm3560_flash *flash)
{
	int rval;
	unsigned int reg_val;

	/* set peak current */
	rval = regmap_update_bits(flash->regmap,
				  REG_FLASH_TOUT, 0x60, flash->pdata->peak);
	if (rval < 0)
		return rval;
	/* output disable */
	flash->led_mode = V4L2_FLASH_LED_MODE_NONE;
	rval = lm3560_mode_ctrl(flash);
	if (rval < 0)
		return rval;
	/* reset faults */
	rval = regmap_read(flash->regmap, REG_FLAG, &reg_val);
	return rval;
}

static int lm3560_probe(struct i2c_client *client,
			const struct i2c_device_id *devid)
{
	struct lm3560_flash *flash;
	struct lm3560_platform_data *pdata = dev_get_platdata(&client->dev);
	int rval;

	flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL);
	if (flash == NULL)
		return -ENOMEM;

	flash->regmap = devm_regmap_init_i2c(client, &lm3560_regmap);
	if (IS_ERR(flash->regmap)) {
		rval = PTR_ERR(flash->regmap);
		return rval;
	}

	/* if there is no platform data, use chip default value */
	if (pdata == NULL) {
		pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
		if (pdata == NULL)
			return -ENODEV;
		pdata->peak = LM3560_PEAK_3600mA;
		pdata->max_flash_timeout = LM3560_FLASH_TOUT_MAX;
		/* led 1 */
		pdata->max_flash_brt[LM3560_LED0] = LM3560_FLASH_BRT_MAX;
		pdata->max_torch_brt[LM3560_LED0] = LM3560_TORCH_BRT_MAX;
		/* led 2 */
		pdata->max_flash_brt[LM3560_LED1] = LM3560_FLASH_BRT_MAX;
		pdata->max_torch_brt[LM3560_LED1] = LM3560_TORCH_BRT_MAX;
	}
	flash->pdata = pdata;
	flash->dev = &client->dev;
	mutex_init(&flash->lock);

	rval = lm3560_subdev_init(flash, LM3560_LED0, "lm3560-led0");
	if (rval < 0)
		return rval;

	rval = lm3560_subdev_init(flash, LM3560_LED1, "lm3560-led1");
	if (rval < 0)
		return rval;

	rval = lm3560_init_device(flash);
	if (rval < 0)
		return rval;

	i2c_set_clientdata(client, flash);

	return 0;
}

static int lm3560_remove(struct i2c_client *client)
{
	struct lm3560_flash *flash = i2c_get_clientdata(client);
	unsigned int i;

	for (i = LM3560_LED0; i < LM3560_LED_MAX; i++) {
		v4l2_device_unregister_subdev(&flash->subdev_led[i]);
		v4l2_ctrl_handler_free(&flash->ctrls_led[i]);
		media_entity_cleanup(&flash->subdev_led[i].entity);
	}

	return 0;
}

static const struct i2c_device_id lm3560_id_table[] = {
	{LM3559_NAME, 0},
	{LM3560_NAME, 0},
	{}
};

MODULE_DEVICE_TABLE(i2c, lm3560_id_table);

static struct i2c_driver lm3560_i2c_driver = {
	.driver = {
		   .name = LM3560_NAME,
		   .pm = NULL,
		   },
	.probe = lm3560_probe,
	.remove = lm3560_remove,
	.id_table = lm3560_id_table,
};

module_i2c_driver(lm3560_i2c_driver);

MODULE_AUTHOR("Daniel Jeong <gshark.jeong@gmail.com>");
MODULE_AUTHOR("Ldd Mlp <ldd-mlp@list.ti.com>");
MODULE_DESCRIPTION("Texas Instruments LM3560 LED flash driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
7f6b11a1 DJ	1	/*
7f6b11a1 DJ	2	* drivers/media/i2c/lm3560.c
653d500c	3	* General device driver for TI lm3559, lm3560, FLASH LED Driver
7f6b11a1 DJ	4	*
	5	* Copyright (C) 2013 Texas Instruments
	6	*
	7	* Contact: Daniel Jeong <gshark.jeong@gmail.com>
	8	* Ldd-Mlp <ldd-mlp@list.ti.com>
	9	*
	10	* This program is free software; you can redistribute it and/or
	11	* modify it under the terms of the GNU General Public License
	12	* version 2 as published by the Free Software Foundation.
	13	*
	14	* This program is distributed in the hope that it will be useful, but
	15	* WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* General Public License for more details.
7f6b11a1 DJ	18	*/
	19
	20	#include <linux/delay.h>
	21	#include <linux/module.h>
	22	#include <linux/i2c.h>
	23	#include <linux/slab.h>
	24	#include <linux/mutex.h>
	25	#include <linux/regmap.h>
	26	#include <linux/videodev2.h>
b5dcee22	27	#include <media/i2c/lm3560.h>
7f6b11a1 DJ	28	#include <media/v4l2-ctrls.h>
	29	#include <media/v4l2-device.h>
	30
	31	/* registers definitions */
	32	#define REG_ENABLE 0x10
	33	#define REG_TORCH_BR 0xa0
	34	#define REG_FLASH_BR 0xb0
	35	#define REG_FLASH_TOUT 0xc0
	36	#define REG_FLAG 0xd0
	37	#define REG_CONFIG1 0xe0
	38
d1166b0f	39	/* fault mask */
7f6b11a1 DJ	40	#define FAULT_TIMEOUT (1<<0)
	41	#define FAULT_OVERTEMP (1<<1)
	42	#define FAULT_SHORT_CIRCUIT (1<<2)
	43
	44	enum led_enable {
	45	MODE_SHDN = 0x0,
	46	MODE_TORCH = 0x2,
	47	MODE_FLASH = 0x3,
	48	};
	49
d1166b0f AS	50	/**
d1166b0f AS	51	* struct lm3560_flash
7f6b11a1	52	*
ed050c21	53	* @dev: pointer to &struct device
7f6b11a1 DJ	54	* @pdata: platform data
	55	* @regmap: reg. map for i2c
	56	* @lock: muxtex for serial access.
	57	* @led_mode: V4L2 LED mode
	58	* @ctrls_led: V4L2 contols
	59	* @subdev_led: V4L2 subdev
	60	*/
	61	struct lm3560_flash {
	62	struct device *dev;
	63	struct lm3560_platform_data *pdata;
	64	struct regmap *regmap;
	65	struct mutex lock;
	66
	67	enum v4l2_flash_led_mode led_mode;
	68	struct v4l2_ctrl_handler ctrls_led[LM3560_LED_MAX];
	69	struct v4l2_subdev subdev_led[LM3560_LED_MAX];
	70	};
	71
	72	#define to_lm3560_flash(_ctrl, _no) \
	73	container_of(_ctrl->handler, struct lm3560_flash, ctrls_led[_no])
	74
	75	/* enable mode control */
	76	static int lm3560_mode_ctrl(struct lm3560_flash *flash)
	77	{
	78	int rval = -EINVAL;
	79
	80	switch (flash->led_mode) {
	81	case V4L2_FLASH_LED_MODE_NONE:
	82	rval = regmap_update_bits(flash->regmap,
	83	REG_ENABLE, 0x03, MODE_SHDN);
	84	break;
	85	case V4L2_FLASH_LED_MODE_TORCH:
	86	rval = regmap_update_bits(flash->regmap,
	87	REG_ENABLE, 0x03, MODE_TORCH);
	88	break;
	89	case V4L2_FLASH_LED_MODE_FLASH:
	90	rval = regmap_update_bits(flash->regmap,
	91	REG_ENABLE, 0x03, MODE_FLASH);
	92	break;
	93	}
	94	return rval;
	95	}
	96
d1166b0f	97	/* led1/2 enable/disable */
7f6b11a1 DJ	98	static int lm3560_enable_ctrl(struct lm3560_flash *flash,
	99	enum lm3560_led_id led_no, bool on)
	100	{
	101	int rval;
	102
	103	if (led_no == LM3560_LED0) {
afb666d1	104	if (on)
7f6b11a1 DJ	105	rval = regmap_update_bits(flash->regmap,
	106	REG_ENABLE, 0x08, 0x08);
	107	else
	108	rval = regmap_update_bits(flash->regmap,
	109	REG_ENABLE, 0x08, 0x00);
	110	} else {
afb666d1	111	if (on)
7f6b11a1 DJ	112	rval = regmap_update_bits(flash->regmap,
	113	REG_ENABLE, 0x10, 0x10);
	114	else
	115	rval = regmap_update_bits(flash->regmap,
	116	REG_ENABLE, 0x10, 0x00);
	117	}
	118	return rval;
	119	}
	120
	121	/* torch1/2 brightness control */
	122	static int lm3560_torch_brt_ctrl(struct lm3560_flash *flash,
	123	enum lm3560_led_id led_no, unsigned int brt)
	124	{
	125	int rval;
	126	u8 br_bits;
	127
	128	if (brt < LM3560_TORCH_BRT_MIN)
	129	return lm3560_enable_ctrl(flash, led_no, false);
	130	else
	131	rval = lm3560_enable_ctrl(flash, led_no, true);
	132
	133	br_bits = LM3560_TORCH_BRT_uA_TO_REG(brt);
	134	if (led_no == LM3560_LED0)
	135	rval = regmap_update_bits(flash->regmap,
	136	REG_TORCH_BR, 0x07, br_bits);
	137	else
	138	rval = regmap_update_bits(flash->regmap,
	139	REG_TORCH_BR, 0x38, br_bits << 3);
	140
	141	return rval;
	142	}
	143
	144	/* flash1/2 brightness control */
	145	static int lm3560_flash_brt_ctrl(struct lm3560_flash *flash,
	146	enum lm3560_led_id led_no, unsigned int brt)
	147	{
	148	int rval;
	149	u8 br_bits;
	150
	151	if (brt < LM3560_FLASH_BRT_MIN)
	152	return lm3560_enable_ctrl(flash, led_no, false);
	153	else
	154	rval = lm3560_enable_ctrl(flash, led_no, true);
	155
	156	br_bits = LM3560_FLASH_BRT_uA_TO_REG(brt);
	157	if (led_no == LM3560_LED0)
	158	rval = regmap_update_bits(flash->regmap,
	159	REG_FLASH_BR, 0x0f, br_bits);
	160	else
	161	rval = regmap_update_bits(flash->regmap,
	162	REG_FLASH_BR, 0xf0, br_bits << 4);
	163
	164	return rval;
	165	}
	166
d1166b0f	167	/* v4l2 controls */
7f6b11a1 DJ	168	static int lm3560_get_ctrl(struct v4l2_ctrl *ctrl, enum lm3560_led_id led_no)
	169	{
	170	struct lm3560_flash *flash = to_lm3560_flash(ctrl, led_no);
e1c759bd	171	int rval = -EINVAL;
7f6b11a1 DJ	172
	173	mutex_lock(&flash->lock);
	174
	175	if (ctrl->id == V4L2_CID_FLASH_FAULT) {
7f6b11a1 DJ	176	s32 fault = 0;
	177	unsigned int reg_val;
	178	rval = regmap_read(flash->regmap, REG_FLAG, &reg_val);
	179	if (rval < 0)
e1c759bd DJ	180	goto out;
e1c759bd DJ	181	if (reg_val & FAULT_SHORT_CIRCUIT)
7f6b11a1	182	fault \|= V4L2_FLASH_FAULT_SHORT_CIRCUIT;
e1c759bd	183	if (reg_val & FAULT_OVERTEMP)
7f6b11a1	184	fault \|= V4L2_FLASH_FAULT_OVER_TEMPERATURE;
e1c759bd	185	if (reg_val & FAULT_TIMEOUT)
7f6b11a1 DJ	186	fault \|= V4L2_FLASH_FAULT_TIMEOUT;
7f6b11a1 DJ	187	ctrl->cur.val = fault;
7f6b11a1 DJ	188	}
7f6b11a1 DJ	189
e1c759bd	190	out:
7f6b11a1	191	mutex_unlock(&flash->lock);
e1c759bd	192	return rval;
7f6b11a1 DJ	193	}
	194
	195	static int lm3560_set_ctrl(struct v4l2_ctrl *ctrl, enum lm3560_led_id led_no)
	196	{
	197	struct lm3560_flash *flash = to_lm3560_flash(ctrl, led_no);
	198	u8 tout_bits;
	199	int rval = -EINVAL;
	200
	201	mutex_lock(&flash->lock);
	202
	203	switch (ctrl->id) {
	204	case V4L2_CID_FLASH_LED_MODE:
	205	flash->led_mode = ctrl->val;
	206	if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH)
	207	rval = lm3560_mode_ctrl(flash);
	208	break;
	209
	210	case V4L2_CID_FLASH_STROBE_SOURCE:
	211	rval = regmap_update_bits(flash->regmap,
	212	REG_CONFIG1, 0x04, (ctrl->val) << 2);
	213	if (rval < 0)
	214	goto err_out;
	215	break;
	216
	217	case V4L2_CID_FLASH_STROBE:
eed8c3ee WY	218	if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH) {
	219	rval = -EBUSY;
	220	goto err_out;
	221	}
7f6b11a1 DJ	222	flash->led_mode = V4L2_FLASH_LED_MODE_FLASH;
	223	rval = lm3560_mode_ctrl(flash);
	224	break;
	225
	226	case V4L2_CID_FLASH_STROBE_STOP:
eed8c3ee WY	227	if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH) {
	228	rval = -EBUSY;
	229	goto err_out;
	230	}
7f6b11a1 DJ	231	flash->led_mode = V4L2_FLASH_LED_MODE_NONE;
	232	rval = lm3560_mode_ctrl(flash);
	233	break;
	234
	235	case V4L2_CID_FLASH_TIMEOUT:
	236	tout_bits = LM3560_FLASH_TOUT_ms_TO_REG(ctrl->val);
	237	rval = regmap_update_bits(flash->regmap,
	238	REG_FLASH_TOUT, 0x1f, tout_bits);
	239	break;
	240
	241	case V4L2_CID_FLASH_INTENSITY:
	242	rval = lm3560_flash_brt_ctrl(flash, led_no, ctrl->val);
	243	break;
	244
	245	case V4L2_CID_FLASH_TORCH_INTENSITY:
	246	rval = lm3560_torch_brt_ctrl(flash, led_no, ctrl->val);
	247	break;
	248	}
	249
7f6b11a1	250	err_out:
eed8c3ee	251	mutex_unlock(&flash->lock);
7f6b11a1 DJ	252	return rval;
	253	}
	254
	255	static int lm3560_led1_get_ctrl(struct v4l2_ctrl *ctrl)
	256	{
	257	return lm3560_get_ctrl(ctrl, LM3560_LED1);
	258	}
	259
	260	static int lm3560_led1_set_ctrl(struct v4l2_ctrl *ctrl)
	261	{
	262	return lm3560_set_ctrl(ctrl, LM3560_LED1);
	263	}
	264
	265	static int lm3560_led0_get_ctrl(struct v4l2_ctrl *ctrl)
	266	{
	267	return lm3560_get_ctrl(ctrl, LM3560_LED0);
	268	}
	269
	270	static int lm3560_led0_set_ctrl(struct v4l2_ctrl *ctrl)
	271	{
	272	return lm3560_set_ctrl(ctrl, LM3560_LED0);
	273	}
	274
	275	static const struct v4l2_ctrl_ops lm3560_led_ctrl_ops[LM3560_LED_MAX] = {
	276	[LM3560_LED0] = {
	277	.g_volatile_ctrl = lm3560_led0_get_ctrl,
	278	.s_ctrl = lm3560_led0_set_ctrl,
	279	},
	280	[LM3560_LED1] = {
	281	.g_volatile_ctrl = lm3560_led1_get_ctrl,
	282	.s_ctrl = lm3560_led1_set_ctrl,
	283	}
	284	};
	285
	286	static int lm3560_init_controls(struct lm3560_flash *flash,
	287	enum lm3560_led_id led_no)
	288	{
	289	struct v4l2_ctrl *fault;
	290	u32 max_flash_brt = flash->pdata->max_flash_brt[led_no];
	291	u32 max_torch_brt = flash->pdata->max_torch_brt[led_no];
	292	struct v4l2_ctrl_handler *hdl = &flash->ctrls_led[led_no];
	293	const struct v4l2_ctrl_ops *ops = &lm3560_led_ctrl_ops[led_no];
	294
	295	v4l2_ctrl_handler_init(hdl, 8);
d1166b0f	296
7f6b11a1 DJ	297	/* flash mode */
	298	v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_FLASH_LED_MODE,
	299	V4L2_FLASH_LED_MODE_TORCH, ~0x7,
	300	V4L2_FLASH_LED_MODE_NONE);
	301	flash->led_mode = V4L2_FLASH_LED_MODE_NONE;
	302
	303	/* flash source */
	304	v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_FLASH_STROBE_SOURCE,
	305	0x1, ~0x3, V4L2_FLASH_STROBE_SOURCE_SOFTWARE);
	306
	307	/* flash strobe */
	308	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_STROBE, 0, 0, 0, 0);
d1166b0f	309
7f6b11a1 DJ	310	/* flash strobe stop */
	311	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_STROBE_STOP, 0, 0, 0, 0);
	312
	313	/* flash strobe timeout */
	314	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_TIMEOUT,
	315	LM3560_FLASH_TOUT_MIN,
	316	flash->pdata->max_flash_timeout,
	317	LM3560_FLASH_TOUT_STEP,
	318	flash->pdata->max_flash_timeout);
	319
	320	/* flash brt */
	321	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_INTENSITY,
	322	LM3560_FLASH_BRT_MIN, max_flash_brt,
	323	LM3560_FLASH_BRT_STEP, max_flash_brt);
	324
	325	/* torch brt */
	326	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_TORCH_INTENSITY,
	327	LM3560_TORCH_BRT_MIN, max_torch_brt,
	328	LM3560_TORCH_BRT_STEP, max_torch_brt);
	329
	330	/* fault */
	331	fault = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_FAULT, 0,
	332	V4L2_FLASH_FAULT_OVER_VOLTAGE
	333	\| V4L2_FLASH_FAULT_OVER_TEMPERATURE
	334	\| V4L2_FLASH_FAULT_SHORT_CIRCUIT
	335	\| V4L2_FLASH_FAULT_TIMEOUT, 0, 0);
	336	if (fault != NULL)
	337	fault->flags \|= V4L2_CTRL_FLAG_VOLATILE;
	338
	339	if (hdl->error)
	340	return hdl->error;
	341
	342	flash->subdev_led[led_no].ctrl_handler = hdl;
	343	return 0;
	344	}
	345
	346	/* initialize device */
	347	static const struct v4l2_subdev_ops lm3560_ops = {
	348	.core = NULL,
	349	};
	350
	351	static const struct regmap_config lm3560_regmap = {
	352	.reg_bits = 8,
	353	.val_bits = 8,
	354	.max_register = 0xFF,
	355	};
	356
	357	static int lm3560_subdev_init(struct lm3560_flash *flash,
	358	enum lm3560_led_id led_no, char *led_name)
	359	{
	360	struct i2c_client *client = to_i2c_client(flash->dev);
	361	int rval;
	362
	363	v4l2_i2c_subdev_init(&flash->subdev_led[led_no], client, &lm3560_ops);
	364	flash->subdev_led[led_no].flags \|= V4L2_SUBDEV_FL_HAS_DEVNODE;
cc1e6315 MCC	365	strscpy(flash->subdev_led[led_no].name, led_name,
cc1e6315 MCC	366	sizeof(flash->subdev_led[led_no].name));
7f6b11a1 DJ	367	rval = lm3560_init_controls(flash, led_no);
	368	if (rval)
	369	goto err_out;
ab22e77c	370	rval = media_entity_pads_init(&flash->subdev_led[led_no].entity, 0, NULL);
7f6b11a1 DJ	371	if (rval < 0)
7f6b11a1 DJ	372	goto err_out;
4ca72efa	373	flash->subdev_led[led_no].entity.function = MEDIA_ENT_F_FLASH;
7f6b11a1 DJ	374
	375	return rval;
	376
	377	err_out:
	378	v4l2_ctrl_handler_free(&flash->ctrls_led[led_no]);
	379	return rval;
	380	}
	381
	382	static int lm3560_init_device(struct lm3560_flash *flash)
	383	{
	384	int rval;
	385	unsigned int reg_val;
	386
	387	/* set peak current */
	388	rval = regmap_update_bits(flash->regmap,
	389	REG_FLASH_TOUT, 0x60, flash->pdata->peak);
	390	if (rval < 0)
	391	return rval;
	392	/* output disable */
	393	flash->led_mode = V4L2_FLASH_LED_MODE_NONE;
	394	rval = lm3560_mode_ctrl(flash);
	395	if (rval < 0)
	396	return rval;
d1166b0f	397	/* reset faults */
7f6b11a1 DJ	398	rval = regmap_read(flash->regmap, REG_FLAG, &reg_val);
	399	return rval;
	400	}
	401
	402	static int lm3560_probe(struct i2c_client *client,
	403	const struct i2c_device_id *devid)
	404	{
	405	struct lm3560_flash *flash;
	406	struct lm3560_platform_data *pdata = dev_get_platdata(&client->dev);
	407	int rval;
	408
	409	flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL);
	410	if (flash == NULL)
	411	return -ENOMEM;
	412
	413	flash->regmap = devm_regmap_init_i2c(client, &lm3560_regmap);
	414	if (IS_ERR(flash->regmap)) {
	415	rval = PTR_ERR(flash->regmap);
	416	return rval;
	417	}
	418
	419	/* if there is no platform data, use chip default value */
	420	if (pdata == NULL) {
341ef565	421	pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
7f6b11a1 DJ	422	if (pdata == NULL)
	423	return -ENODEV;
	424	pdata->peak = LM3560_PEAK_3600mA;
	425	pdata->max_flash_timeout = LM3560_FLASH_TOUT_MAX;
	426	/* led 1 */
	427	pdata->max_flash_brt[LM3560_LED0] = LM3560_FLASH_BRT_MAX;
	428	pdata->max_torch_brt[LM3560_LED0] = LM3560_TORCH_BRT_MAX;
	429	/* led 2 */
	430	pdata->max_flash_brt[LM3560_LED1] = LM3560_FLASH_BRT_MAX;
	431	pdata->max_torch_brt[LM3560_LED1] = LM3560_TORCH_BRT_MAX;
	432	}
	433	flash->pdata = pdata;
	434	flash->dev = &client->dev;
	435	mutex_init(&flash->lock);
	436
	437	rval = lm3560_subdev_init(flash, LM3560_LED0, "lm3560-led0");
	438	if (rval < 0)
	439	return rval;
	440
	441	rval = lm3560_subdev_init(flash, LM3560_LED1, "lm3560-led1");
	442	if (rval < 0)
	443	return rval;
	444
	445	rval = lm3560_init_device(flash);
	446	if (rval < 0)
	447	return rval;
	448
cc58f4db WY	449	i2c_set_clientdata(client, flash);
cc58f4db WY	450
7f6b11a1 DJ	451	return 0;
	452	}
	453
	454	static int lm3560_remove(struct i2c_client *client)
	455	{
cc58f4db	456	struct lm3560_flash *flash = i2c_get_clientdata(client);
7f6b11a1 DJ	457	unsigned int i;
	458
	459	for (i = LM3560_LED0; i < LM3560_LED_MAX; i++) {
	460	v4l2_device_unregister_subdev(&flash->subdev_led[i]);
	461	v4l2_ctrl_handler_free(&flash->ctrls_led[i]);
	462	media_entity_cleanup(&flash->subdev_led[i].entity);
	463	}
	464
	465	return 0;
	466	}
	467
	468	static const struct i2c_device_id lm3560_id_table[] = {
653d500c	469	{LM3559_NAME, 0},
7f6b11a1 DJ	470	{LM3560_NAME, 0},
	471	{}
	472	};
	473
	474	MODULE_DEVICE_TABLE(i2c, lm3560_id_table);
	475
	476	static struct i2c_driver lm3560_i2c_driver = {
	477	.driver = {
	478	.name = LM3560_NAME,
	479	.pm = NULL,
	480	},
	481	.probe = lm3560_probe,
	482	.remove = lm3560_remove,
	483	.id_table = lm3560_id_table,
	484	};
	485
	486	module_i2c_driver(lm3560_i2c_driver);
	487
	488	MODULE_AUTHOR("Daniel Jeong <gshark.jeong@gmail.com>");
	489	MODULE_AUTHOR("Ldd Mlp <ldd-mlp@list.ti.com>");
	490	MODULE_DESCRIPTION("Texas Instruments LM3560 LED flash driver");
	491	MODULE_LICENSE("GPL");