[deliverable/linux.git] / drivers / media / i2c / mt9v011.c

/*
 * mt9v011 -Micron 1/4-Inch VGA Digital Image Sensor
 *
 * Copyright (c) 2009 Mauro Carvalho Chehab
 * This code is placed under the terms of the GNU General Public License v2
 */

#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <asm/div64.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
#include <media/mt9v011.h>

MODULE_DESCRIPTION("Micron mt9v011 sensor driver");
MODULE_AUTHOR("Mauro Carvalho Chehab");
MODULE_LICENSE("GPL");

static int debug;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level (0-2)");

#define R00_MT9V011_CHIP_VERSION	0x00
#define R01_MT9V011_ROWSTART		0x01
#define R02_MT9V011_COLSTART		0x02
#define R03_MT9V011_HEIGHT		0x03
#define R04_MT9V011_WIDTH		0x04
#define R05_MT9V011_HBLANK		0x05
#define R06_MT9V011_VBLANK		0x06
#define R07_MT9V011_OUT_CTRL		0x07
#define R09_MT9V011_SHUTTER_WIDTH	0x09
#define R0A_MT9V011_CLK_SPEED		0x0a
#define R0B_MT9V011_RESTART		0x0b
#define R0C_MT9V011_SHUTTER_DELAY	0x0c
#define R0D_MT9V011_RESET		0x0d
#define R1E_MT9V011_DIGITAL_ZOOM	0x1e
#define R20_MT9V011_READ_MODE		0x20
#define R2B_MT9V011_GREEN_1_GAIN	0x2b
#define R2C_MT9V011_BLUE_GAIN		0x2c
#define R2D_MT9V011_RED_GAIN		0x2d
#define R2E_MT9V011_GREEN_2_GAIN	0x2e
#define R35_MT9V011_GLOBAL_GAIN		0x35
#define RF1_MT9V011_CHIP_ENABLE		0xf1

#define MT9V011_VERSION			0x8232
#define MT9V011_REV_B_VERSION		0x8243

struct mt9v011 {
	struct v4l2_subdev sd;
	struct v4l2_ctrl_handler ctrls;
	unsigned width, height;
	unsigned xtal;
	unsigned hflip:1;
	unsigned vflip:1;

	u16 global_gain, exposure;
	s16 red_bal, blue_bal;
};

static inline struct mt9v011 *to_mt9v011(struct v4l2_subdev *sd)
{
	return container_of(sd, struct mt9v011, sd);
}

static int mt9v011_read(struct v4l2_subdev *sd, unsigned char addr)
{
	struct i2c_client *c = v4l2_get_subdevdata(sd);
	__be16 buffer;
	int rc, val;

	rc = i2c_master_send(c, &addr, 1);
	if (rc != 1)
		v4l2_dbg(0, debug, sd,
			 "i2c i/o error: rc == %d (should be 1)\n", rc);

	msleep(10);

	rc = i2c_master_recv(c, (char *)&buffer, 2);
	if (rc != 2)
		v4l2_dbg(0, debug, sd,
			 "i2c i/o error: rc == %d (should be 2)\n", rc);

	val = be16_to_cpu(buffer);

	v4l2_dbg(2, debug, sd, "mt9v011: read 0x%02x = 0x%04x\n", addr, val);

	return val;
}

static void mt9v011_write(struct v4l2_subdev *sd, unsigned char addr,
				 u16 value)
{
	struct i2c_client *c = v4l2_get_subdevdata(sd);
	unsigned char buffer[3];
	int rc;

	buffer[0] = addr;
	buffer[1] = value >> 8;
	buffer[2] = value & 0xff;

	v4l2_dbg(2, debug, sd,
		 "mt9v011: writing 0x%02x 0x%04x\n", buffer[0], value);
	rc = i2c_master_send(c, buffer, 3);
	if (rc != 3)
		v4l2_dbg(0, debug, sd,
			 "i2c i/o error: rc == %d (should be 3)\n", rc);
}


struct i2c_reg_value {
	unsigned char reg;
	u16           value;
};

/*
 * Values used at the original driver
 * Some values are marked as Reserved at the datasheet
 */
static const struct i2c_reg_value mt9v011_init_default[] = {
		{ R0D_MT9V011_RESET, 0x0001 },
		{ R0D_MT9V011_RESET, 0x0000 },

		{ R0C_MT9V011_SHUTTER_DELAY, 0x0000 },
		{ R09_MT9V011_SHUTTER_WIDTH, 0x1fc },

		{ R0A_MT9V011_CLK_SPEED, 0x0000 },
		{ R1E_MT9V011_DIGITAL_ZOOM,  0x0000 },

		{ R07_MT9V011_OUT_CTRL, 0x0002 },	/* chip enable */
};


static u16 calc_mt9v011_gain(s16 lineargain)
{

	u16 digitalgain = 0;
	u16 analogmult = 0;
	u16 analoginit = 0;

	if (lineargain < 0)
		lineargain = 0;

	/* recommended minimum */
	lineargain += 0x0020;

	if (lineargain > 2047)
		lineargain = 2047;

	if (lineargain > 1023) {
		digitalgain = 3;
		analogmult = 3;
		analoginit = lineargain / 16;
	} else if (lineargain > 511) {
		digitalgain = 1;
		analogmult = 3;
		analoginit = lineargain / 8;
	} else if (lineargain > 255) {
		analogmult = 3;
		analoginit = lineargain / 4;
	} else if (lineargain > 127) {
		analogmult = 1;
		analoginit = lineargain / 2;
	} else
		analoginit = lineargain;

	return analoginit + (analogmult << 7) + (digitalgain << 9);

}

static void set_balance(struct v4l2_subdev *sd)
{
	struct mt9v011 *core = to_mt9v011(sd);
	u16 green_gain, blue_gain, red_gain;
	u16 exposure;
	s16 bal;

	exposure = core->exposure;

	green_gain = calc_mt9v011_gain(core->global_gain);

	bal = core->global_gain;
	bal += (core->blue_bal * core->global_gain / (1 << 7));
	blue_gain = calc_mt9v011_gain(bal);

	bal = core->global_gain;
	bal += (core->red_bal * core->global_gain / (1 << 7));
	red_gain = calc_mt9v011_gain(bal);

	mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green_gain);
	mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN, green_gain);
	mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain);
	mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain);
	mt9v011_write(sd, R09_MT9V011_SHUTTER_WIDTH, exposure);
}

static void calc_fps(struct v4l2_subdev *sd, u32 *numerator, u32 *denominator)
{
	struct mt9v011 *core = to_mt9v011(sd);
	unsigned height, width, hblank, vblank, speed;
	unsigned row_time, t_time;
	u64 frames_per_ms;
	unsigned tmp;

	height = mt9v011_read(sd, R03_MT9V011_HEIGHT);
	width = mt9v011_read(sd, R04_MT9V011_WIDTH);
	hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);
	vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);
	speed = mt9v011_read(sd, R0A_MT9V011_CLK_SPEED);

	row_time = (width + 113 + hblank) * (speed + 2);
	t_time = row_time * (height + vblank + 1);

	frames_per_ms = core->xtal * 1000l;
	do_div(frames_per_ms, t_time);
	tmp = frames_per_ms;

	v4l2_dbg(1, debug, sd, "Programmed to %u.%03u fps (%d pixel clcks)\n",
		tmp / 1000, tmp % 1000, t_time);

	if (numerator && denominator) {
		*numerator = 1000;
		*denominator = (u32)frames_per_ms;
	}
}

static u16 calc_speed(struct v4l2_subdev *sd, u32 numerator, u32 denominator)
{
	struct mt9v011 *core = to_mt9v011(sd);
	unsigned height, width, hblank, vblank;
	unsigned row_time, line_time;
	u64 t_time, speed;

	/* Avoid bogus calculus */
	if (!numerator || !denominator)
		return 0;

	height = mt9v011_read(sd, R03_MT9V011_HEIGHT);
	width = mt9v011_read(sd, R04_MT9V011_WIDTH);
	hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);
	vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);

	row_time = width + 113 + hblank;
	line_time = height + vblank + 1;

	t_time = core->xtal * ((u64)numerator);
	/* round to the closest value */
	t_time += denominator / 2;
	do_div(t_time, denominator);

	speed = t_time;
	do_div(speed, row_time * line_time);

	/* Avoid having a negative value for speed */
	if (speed < 2)
		speed = 0;
	else
		speed -= 2;

	/* Avoid speed overflow */
	if (speed > 15)
		return 15;

	return (u16)speed;
}

static void set_res(struct v4l2_subdev *sd)
{
	struct mt9v011 *core = to_mt9v011(sd);
	unsigned vstart, hstart;

	/*
	 * The mt9v011 doesn't have scaling. So, in order to select the desired
	 * resolution, we're cropping at the middle of the sensor.
	 * hblank and vblank should be adjusted, in order to warrant that
	 * we'll preserve the line timings for 30 fps, no matter what resolution
	 * is selected.
	 * NOTE: datasheet says that width (and height) should be filled with
	 * width-1. However, this doesn't work, since one pixel per line will
	 * be missing.
	 */

	hstart = 20 + (640 - core->width) / 2;
	mt9v011_write(sd, R02_MT9V011_COLSTART, hstart);
	mt9v011_write(sd, R04_MT9V011_WIDTH, core->width);
	mt9v011_write(sd, R05_MT9V011_HBLANK, 771 - core->width);

	vstart = 8 + (480 - core->height) / 2;
	mt9v011_write(sd, R01_MT9V011_ROWSTART, vstart);
	mt9v011_write(sd, R03_MT9V011_HEIGHT, core->height);
	mt9v011_write(sd, R06_MT9V011_VBLANK, 508 - core->height);

	calc_fps(sd, NULL, NULL);
};

static void set_read_mode(struct v4l2_subdev *sd)
{
	struct mt9v011 *core = to_mt9v011(sd);
	unsigned mode = 0x1000;

	if (core->hflip)
		mode |= 0x4000;

	if (core->vflip)
		mode |= 0x8000;

	mt9v011_write(sd, R20_MT9V011_READ_MODE, mode);
}

static int mt9v011_reset(struct v4l2_subdev *sd, u32 val)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(mt9v011_init_default); i++)
		mt9v011_write(sd, mt9v011_init_default[i].reg,
			       mt9v011_init_default[i].value);

	set_balance(sd);
	set_res(sd);
	set_read_mode(sd);

	return 0;
}

static int mt9v011_enum_mbus_fmt(struct v4l2_subdev *sd, unsigned index,
					u32 *code)
{
	if (index > 0)
		return -EINVAL;

	*code = MEDIA_BUS_FMT_SGRBG8_1X8;
	return 0;
}

static int mt9v011_try_mbus_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *fmt)
{
	if (fmt->code != MEDIA_BUS_FMT_SGRBG8_1X8)
		return -EINVAL;

	v4l_bound_align_image(&fmt->width, 48, 639, 1,
			      &fmt->height, 32, 480, 1, 0);
	fmt->field = V4L2_FIELD_NONE;
	fmt->colorspace = V4L2_COLORSPACE_SRGB;

	return 0;
}

static int mt9v011_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
{
	struct v4l2_captureparm *cp = &parms->parm.capture;

	if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
		return -EINVAL;

	memset(cp, 0, sizeof(struct v4l2_captureparm));
	cp->capability = V4L2_CAP_TIMEPERFRAME;
	calc_fps(sd,
		 &cp->timeperframe.numerator,
		 &cp->timeperframe.denominator);

	return 0;
}

static int mt9v011_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
{
	struct v4l2_captureparm *cp = &parms->parm.capture;
	struct v4l2_fract *tpf = &cp->timeperframe;
	u16 speed;

	if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
		return -EINVAL;
	if (cp->extendedmode != 0)
		return -EINVAL;

	speed = calc_speed(sd, tpf->numerator, tpf->denominator);

	mt9v011_write(sd, R0A_MT9V011_CLK_SPEED, speed);
	v4l2_dbg(1, debug, sd, "Setting speed to %d\n", speed);

	/* Recalculate and update fps info */
	calc_fps(sd, &tpf->numerator, &tpf->denominator);

	return 0;
}

static int mt9v011_s_mbus_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *fmt)
{
	struct mt9v011 *core = to_mt9v011(sd);
	int rc;

	rc = mt9v011_try_mbus_fmt(sd, fmt);
	if (rc < 0)
		return -EINVAL;

	core->width = fmt->width;
	core->height = fmt->height;

	set_res(sd);

	return 0;
}

#ifdef CONFIG_VIDEO_ADV_DEBUG
static int mt9v011_g_register(struct v4l2_subdev *sd,
			      struct v4l2_dbg_register *reg)
{
	reg->val = mt9v011_read(sd, reg->reg & 0xff);
	reg->size = 2;

	return 0;
}

static int mt9v011_s_register(struct v4l2_subdev *sd,
			      const struct v4l2_dbg_register *reg)
{
	mt9v011_write(sd, reg->reg & 0xff, reg->val & 0xffff);

	return 0;
}
#endif

static int mt9v011_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct mt9v011 *core =
		container_of(ctrl->handler, struct mt9v011, ctrls);
	struct v4l2_subdev *sd = &core->sd;

	switch (ctrl->id) {
	case V4L2_CID_GAIN:
		core->global_gain = ctrl->val;
		break;
	case V4L2_CID_EXPOSURE:
		core->exposure = ctrl->val;
		break;
	case V4L2_CID_RED_BALANCE:
		core->red_bal = ctrl->val;
		break;
	case V4L2_CID_BLUE_BALANCE:
		core->blue_bal = ctrl->val;
		break;
	case V4L2_CID_HFLIP:
		core->hflip = ctrl->val;
		set_read_mode(sd);
		return 0;
	case V4L2_CID_VFLIP:
		core->vflip = ctrl->val;
		set_read_mode(sd);
		return 0;
	default:
		return -EINVAL;
	}

	set_balance(sd);
	return 0;
}

static struct v4l2_ctrl_ops mt9v011_ctrl_ops = {
	.s_ctrl = mt9v011_s_ctrl,
};

static const struct v4l2_subdev_core_ops mt9v011_core_ops = {
	.reset = mt9v011_reset,
#ifdef CONFIG_VIDEO_ADV_DEBUG
	.g_register = mt9v011_g_register,
	.s_register = mt9v011_s_register,
#endif
};

static const struct v4l2_subdev_video_ops mt9v011_video_ops = {
	.enum_mbus_fmt = mt9v011_enum_mbus_fmt,
	.try_mbus_fmt = mt9v011_try_mbus_fmt,
	.s_mbus_fmt = mt9v011_s_mbus_fmt,
	.g_parm = mt9v011_g_parm,
	.s_parm = mt9v011_s_parm,
};

static const struct v4l2_subdev_ops mt9v011_ops = {
	.core  = &mt9v011_core_ops,
	.video = &mt9v011_video_ops,
};


/****************************************************************************
			I2C Client & Driver
 ****************************************************************************/

static int mt9v011_probe(struct i2c_client *c,
			 const struct i2c_device_id *id)
{
	u16 version;
	struct mt9v011 *core;
	struct v4l2_subdev *sd;

	/* Check if the adapter supports the needed features */
	if (!i2c_check_functionality(c->adapter,
	     I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
		return -EIO;

	core = devm_kzalloc(&c->dev, sizeof(struct mt9v011), GFP_KERNEL);
	if (!core)
		return -ENOMEM;

	sd = &core->sd;
	v4l2_i2c_subdev_init(sd, c, &mt9v011_ops);

	/* Check if the sensor is really a MT9V011 */
	version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);
	if ((version != MT9V011_VERSION) &&
	    (version != MT9V011_REV_B_VERSION)) {
		v4l2_info(sd, "*** unknown micron chip detected (0x%04x).\n",
			  version);
		return -EINVAL;
	}

	v4l2_ctrl_handler_init(&core->ctrls, 5);
	v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,
			  V4L2_CID_GAIN, 0, (1 << 12) - 1 - 0x20, 1, 0x20);
	v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,
			  V4L2_CID_EXPOSURE, 0, 2047, 1, 0x01fc);
	v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,
			  V4L2_CID_RED_BALANCE, -(1 << 9), (1 << 9) - 1, 1, 0);
	v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,
			  V4L2_CID_BLUE_BALANCE, -(1 << 9), (1 << 9) - 1, 1, 0);
	v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,
			  V4L2_CID_HFLIP, 0, 1, 1, 0);
	v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,
			  V4L2_CID_VFLIP, 0, 1, 1, 0);

	if (core->ctrls.error) {
		int ret = core->ctrls.error;

		v4l2_err(sd, "control initialization error %d\n", ret);
		v4l2_ctrl_handler_free(&core->ctrls);
		return ret;
	}
	core->sd.ctrl_handler = &core->ctrls;

	core->global_gain = 0x0024;
	core->exposure = 0x01fc;
	core->width  = 640;
	core->height = 480;
	core->xtal = 27000000;	/* Hz */

	if (c->dev.platform_data) {
		struct mt9v011_platform_data *pdata = c->dev.platform_data;

		core->xtal = pdata->xtal;
		v4l2_dbg(1, debug, sd, "xtal set to %d.%03d MHz\n",
			core->xtal / 1000000, (core->xtal / 1000) % 1000);
	}

	v4l_info(c, "chip found @ 0x%02x (%s - chip version 0x%04x)\n",
		 c->addr << 1, c->adapter->name, version);

	return 0;
}

static int mt9v011_remove(struct i2c_client *c)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(c);
	struct mt9v011 *core = to_mt9v011(sd);

	v4l2_dbg(1, debug, sd,
		"mt9v011.c: removing mt9v011 adapter on address 0x%x\n",
		c->addr << 1);

	v4l2_device_unregister_subdev(sd);
	v4l2_ctrl_handler_free(&core->ctrls);

	return 0;
}

/* ----------------------------------------------------------------------- */

static const struct i2c_device_id mt9v011_id[] = {
	{ "mt9v011", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, mt9v011_id);

static struct i2c_driver mt9v011_driver = {
	.driver = {
		.owner	= THIS_MODULE,
		.name	= "mt9v011",
	},
	.probe		= mt9v011_probe,
	.remove		= mt9v011_remove,
	.id_table	= mt9v011_id,
};

module_i2c_driver(mt9v011_driver);
Commit	Line	Data
7dfba00d MCC	1	/*
	2	* mt9v011 -Micron 1/4-Inch VGA Digital Image Sensor
	3	*
37e59f87	4	* Copyright (c) 2009 Mauro Carvalho Chehab
7dfba00d MCC	5	* This code is placed under the terms of the GNU General Public License v2
	6	*/
	7
	8	#include <linux/i2c.h>
5a0e3ad6	9	#include <linux/slab.h>
7dfba00d MCC	10	#include <linux/videodev2.h>
7dfba00d MCC	11	#include <linux/delay.h>
7a707b89	12	#include <linux/module.h>
e11206e6	13	#include <asm/div64.h>
7dfba00d	14	#include <media/v4l2-device.h>
ea01a83d	15	#include <media/v4l2-ctrls.h>
3c7c9370	16	#include <media/mt9v011.h>
7dfba00d MCC	17
7dfba00d MCC	18	MODULE_DESCRIPTION("Micron mt9v011 sensor driver");
37e59f87	19	MODULE_AUTHOR("Mauro Carvalho Chehab");
7dfba00d MCC	20	MODULE_LICENSE("GPL");
7dfba00d MCC	21
7dfba00d MCC	22	static int debug;
	23	module_param(debug, int, 0);
	24	MODULE_PARM_DESC(debug, "Debug level (0-2)");
	25
3c7c9370 HV	26	#define R00_MT9V011_CHIP_VERSION 0x00
	27	#define R01_MT9V011_ROWSTART 0x01
	28	#define R02_MT9V011_COLSTART 0x02
	29	#define R03_MT9V011_HEIGHT 0x03
	30	#define R04_MT9V011_WIDTH 0x04
	31	#define R05_MT9V011_HBLANK 0x05
	32	#define R06_MT9V011_VBLANK 0x06
	33	#define R07_MT9V011_OUT_CTRL 0x07
	34	#define R09_MT9V011_SHUTTER_WIDTH 0x09
	35	#define R0A_MT9V011_CLK_SPEED 0x0a
	36	#define R0B_MT9V011_RESTART 0x0b
	37	#define R0C_MT9V011_SHUTTER_DELAY 0x0c
	38	#define R0D_MT9V011_RESET 0x0d
	39	#define R1E_MT9V011_DIGITAL_ZOOM 0x1e
	40	#define R20_MT9V011_READ_MODE 0x20
	41	#define R2B_MT9V011_GREEN_1_GAIN 0x2b
	42	#define R2C_MT9V011_BLUE_GAIN 0x2c
	43	#define R2D_MT9V011_RED_GAIN 0x2d
	44	#define R2E_MT9V011_GREEN_2_GAIN 0x2e
	45	#define R35_MT9V011_GLOBAL_GAIN 0x35
	46	#define RF1_MT9V011_CHIP_ENABLE 0xf1
	47
	48	#define MT9V011_VERSION 0x8232
	49	#define MT9V011_REV_B_VERSION 0x8243
	50
7dfba00d MCC	51	struct mt9v011 {
7dfba00d MCC	52	struct v4l2_subdev sd;
ea01a83d	53	struct v4l2_ctrl_handler ctrls;
27fe4a30	54	unsigned width, height;
e11206e6	55	unsigned xtal;
2526ea6e MCC	56	unsigned hflip:1;
2526ea6e MCC	57	unsigned vflip:1;
7dfba00d	58
32127363 JO	59	u16 global_gain, exposure;
32127363 JO	60	s16 red_bal, blue_bal;
7dfba00d MCC	61	};
	62
	63	static inline struct mt9v011 to_mt9v011(struct v4l2_subdev sd)
	64	{
	65	return container_of(sd, struct mt9v011, sd);
	66	}
	67
	68	static int mt9v011_read(struct v4l2_subdev *sd, unsigned char addr)
	69	{
	70	struct i2c_client *c = v4l2_get_subdevdata(sd);
	71	__be16 buffer;
	72	int rc, val;
	73
fbe2800c MCC	74	rc = i2c_master_send(c, &addr, 1);
fbe2800c MCC	75	if (rc != 1)
7dfba00d MCC	76	v4l2_dbg(0, debug, sd,
	77	"i2c i/o error: rc == %d (should be 1)\n", rc);
	78
	79	msleep(10);
	80
fbe2800c MCC	81	rc = i2c_master_recv(c, (char *)&buffer, 2);
fbe2800c MCC	82	if (rc != 2)
7dfba00d	83	v4l2_dbg(0, debug, sd,
fbe2800c	84	"i2c i/o error: rc == %d (should be 2)\n", rc);
7dfba00d MCC	85
	86	val = be16_to_cpu(buffer);
	87
	88	v4l2_dbg(2, debug, sd, "mt9v011: read 0x%02x = 0x%04x\n", addr, val);
	89
	90	return val;
	91	}
	92
	93	static void mt9v011_write(struct v4l2_subdev *sd, unsigned char addr,
	94	u16 value)
	95	{
	96	struct i2c_client *c = v4l2_get_subdevdata(sd);
	97	unsigned char buffer[3];
	98	int rc;
	99
	100	buffer[0] = addr;
	101	buffer[1] = value >> 8;
	102	buffer[2] = value & 0xff;
	103
	104	v4l2_dbg(2, debug, sd,
	105	"mt9v011: writing 0x%02x 0x%04x\n", buffer[0], value);
27fe4a30	106	rc = i2c_master_send(c, buffer, 3);
fbe2800c	107	if (rc != 3)
7dfba00d MCC	108	v4l2_dbg(0, debug, sd,
	109	"i2c i/o error: rc == %d (should be 3)\n", rc);
	110	}
	111
	112
	113	struct i2c_reg_value {
	114	unsigned char reg;
	115	u16 value;
	116	};
	117
	118	/*
	119	* Values used at the original driver
	120	* Some values are marked as Reserved at the datasheet
	121	*/
	122	static const struct i2c_reg_value mt9v011_init_default[] = {
7dfba00d MCC	123	{ R0D_MT9V011_RESET, 0x0001 },
7dfba00d MCC	124	{ R0D_MT9V011_RESET, 0x0000 },
afe09f82	125
afe09f82	126	{ R0C_MT9V011_SHUTTER_DELAY, 0x0000 },
6934e6ff MCC	127	{ R09_MT9V011_SHUTTER_WIDTH, 0x1fc },
	128
	129	{ R0A_MT9V011_CLK_SPEED, 0x0000 },
afe09f82	130	{ R1E_MT9V011_DIGITAL_ZOOM, 0x0000 },
afe09f82	131
e11206e6	132	{ R07_MT9V011_OUT_CTRL, 0x0002 }, /* chip enable */
7dfba00d MCC	133	};
7dfba00d MCC	134
32127363 JO	135
	136	static u16 calc_mt9v011_gain(s16 lineargain)
	137	{
	138
	139	u16 digitalgain = 0;
	140	u16 analogmult = 0;
	141	u16 analoginit = 0;
	142
	143	if (lineargain < 0)
	144	lineargain = 0;
	145
	146	/* recommended minimum */
	147	lineargain += 0x0020;
	148
	149	if (lineargain > 2047)
	150	lineargain = 2047;
	151
	152	if (lineargain > 1023) {
	153	digitalgain = 3;
	154	analogmult = 3;
	155	analoginit = lineargain / 16;
	156	} else if (lineargain > 511) {
	157	digitalgain = 1;
	158	analogmult = 3;
	159	analoginit = lineargain / 8;
	160	} else if (lineargain > 255) {
	161	analogmult = 3;
	162	analoginit = lineargain / 4;
	163	} else if (lineargain > 127) {
	164	analogmult = 1;
	165	analoginit = lineargain / 2;
	166	} else
	167	analoginit = lineargain;
	168
	169	return analoginit + (analogmult << 7) + (digitalgain << 9);
	170
	171	}
	172
7dfba00d MCC	173	static void set_balance(struct v4l2_subdev *sd)
	174	{
	175	struct mt9v011 *core = to_mt9v011(sd);
32127363	176	u16 green_gain, blue_gain, red_gain;
590929f3	177	u16 exposure;
32127363	178	s16 bal;
590929f3 JO	179
590929f3 JO	180	exposure = core->exposure;
7dfba00d	181
32127363	182	green_gain = calc_mt9v011_gain(core->global_gain);
7dfba00d	183
32127363 JO	184	bal = core->global_gain;
	185	bal += (core->blue_bal * core->global_gain / (1 << 7));
	186	blue_gain = calc_mt9v011_gain(bal);
7dfba00d	187
32127363 JO	188	bal = core->global_gain;
	189	bal += (core->red_bal * core->global_gain / (1 << 7));
	190	red_gain = calc_mt9v011_gain(bal);
7dfba00d	191
32127363 JO	192	mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green_gain);
32127363 JO	193	mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN, green_gain);
7dfba00d MCC	194	mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain);
7dfba00d MCC	195	mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain);
590929f3	196	mt9v011_write(sd, R09_MT9V011_SHUTTER_WIDTH, exposure);
7dfba00d MCC	197	}
7dfba00d MCC	198
83053f7f	199	static void calc_fps(struct v4l2_subdev sd, u32 numerator, u32 *denominator)
e11206e6 MCC	200	{
	201	struct mt9v011 *core = to_mt9v011(sd);
	202	unsigned height, width, hblank, vblank, speed;
	203	unsigned row_time, t_time;
	204	u64 frames_per_ms;
	205	unsigned tmp;
	206
	207	height = mt9v011_read(sd, R03_MT9V011_HEIGHT);
	208	width = mt9v011_read(sd, R04_MT9V011_WIDTH);
	209	hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);
	210	vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);
	211	speed = mt9v011_read(sd, R0A_MT9V011_CLK_SPEED);
	212
	213	row_time = (width + 113 + hblank) * (speed + 2);
	214	t_time = row_time * (height + vblank + 1);
	215
	216	frames_per_ms = core->xtal * 1000l;
	217	do_div(frames_per_ms, t_time);
	218	tmp = frames_per_ms;
	219
	220	v4l2_dbg(1, debug, sd, "Programmed to %u.%03u fps (%d pixel clcks)\n",
	221	tmp / 1000, tmp % 1000, t_time);
83053f7f MCC	222
	223	if (numerator && denominator) {
	224	*numerator = 1000;
	225	*denominator = (u32)frames_per_ms;
	226	}
	227	}
	228
	229	static u16 calc_speed(struct v4l2_subdev *sd, u32 numerator, u32 denominator)
	230	{
	231	struct mt9v011 *core = to_mt9v011(sd);
	232	unsigned height, width, hblank, vblank;
	233	unsigned row_time, line_time;
	234	u64 t_time, speed;
	235
	236	/* Avoid bogus calculus */
	237	if (!numerator \|\| !denominator)
	238	return 0;
	239
	240	height = mt9v011_read(sd, R03_MT9V011_HEIGHT);
	241	width = mt9v011_read(sd, R04_MT9V011_WIDTH);
	242	hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);
	243	vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);
	244
	245	row_time = width + 113 + hblank;
	246	line_time = height + vblank + 1;
	247
	248	t_time = core->xtal * ((u64)numerator);
	249	/* round to the closest value */
	250	t_time += denominator / 2;
	251	do_div(t_time, denominator);
	252
	253	speed = t_time;
	254	do_div(speed, row_time * line_time);
	255
	256	/* Avoid having a negative value for speed */
	257	if (speed < 2)
	258	speed = 0;
	259	else
	260	speed -= 2;
	261
	262	/* Avoid speed overflow */
	263	if (speed > 15)
	264	return 15;
	265
	266	return (u16)speed;
e11206e6 MCC	267	}
e11206e6 MCC	268
27fe4a30 MCC	269	static void set_res(struct v4l2_subdev *sd)
	270	{
	271	struct mt9v011 *core = to_mt9v011(sd);
	272	unsigned vstart, hstart;
	273
	274	/*
	275	* The mt9v011 doesn't have scaling. So, in order to select the desired
	276	* resolution, we're cropping at the middle of the sensor.
	277	* hblank and vblank should be adjusted, in order to warrant that
	278	* we'll preserve the line timings for 30 fps, no matter what resolution
	279	* is selected.
6934e6ff MCC	280	* NOTE: datasheet says that width (and height) should be filled with
	281	* width-1. However, this doesn't work, since one pixel per line will
	282	* be missing.
27fe4a30 MCC	283	*/
27fe4a30 MCC	284
1048af2f	285	hstart = 20 + (640 - core->width) / 2;
27fe4a30 MCC	286	mt9v011_write(sd, R02_MT9V011_COLSTART, hstart);
	287	mt9v011_write(sd, R04_MT9V011_WIDTH, core->width);
	288	mt9v011_write(sd, R05_MT9V011_HBLANK, 771 - core->width);
	289
c180604a	290	vstart = 8 + (480 - core->height) / 2;
27fe4a30 MCC	291	mt9v011_write(sd, R01_MT9V011_ROWSTART, vstart);
	292	mt9v011_write(sd, R03_MT9V011_HEIGHT, core->height);
	293	mt9v011_write(sd, R06_MT9V011_VBLANK, 508 - core->height);
e11206e6	294
83053f7f	295	calc_fps(sd, NULL, NULL);
27fe4a30 MCC	296	};
27fe4a30 MCC	297
2526ea6e MCC	298	static void set_read_mode(struct v4l2_subdev *sd)
	299	{
	300	struct mt9v011 *core = to_mt9v011(sd);
	301	unsigned mode = 0x1000;
	302
	303	if (core->hflip)
	304	mode \|= 0x4000;
	305
	306	if (core->vflip)
	307	mode \|= 0x8000;
	308
	309	mt9v011_write(sd, R20_MT9V011_READ_MODE, mode);
	310	}
	311
7dfba00d MCC	312	static int mt9v011_reset(struct v4l2_subdev *sd, u32 val)
7dfba00d MCC	313	{
7dfba00d MCC	314	int i;
7dfba00d MCC	315
7dfba00d MCC	316	for (i = 0; i < ARRAY_SIZE(mt9v011_init_default); i++)
	317	mt9v011_write(sd, mt9v011_init_default[i].reg,
	318	mt9v011_init_default[i].value);
	319
	320	set_balance(sd);
27fe4a30	321	set_res(sd);
2526ea6e	322	set_read_mode(sd);
7dfba00d	323
7dfba00d MCC	324	return 0;
	325	}
	326
ea01b11a	327	static int mt9v011_enum_mbus_fmt(struct v4l2_subdev *sd, unsigned index,
f5fe58fd	328	u32 *code)
27fe4a30	329	{
ea01b11a	330	if (index > 0)
27fe4a30 MCC	331	return -EINVAL;
27fe4a30 MCC	332
f5fe58fd	333	*code = MEDIA_BUS_FMT_SGRBG8_1X8;
27fe4a30 MCC	334	return 0;
	335	}
	336
ea01b11a	337	static int mt9v011_try_mbus_fmt(struct v4l2_subdev sd, struct v4l2_mbus_framefmt fmt)
27fe4a30	338	{
f5fe58fd	339	if (fmt->code != MEDIA_BUS_FMT_SGRBG8_1X8)
27fe4a30 MCC	340	return -EINVAL;
27fe4a30 MCC	341
ea01b11a HV	342	v4l_bound_align_image(&fmt->width, 48, 639, 1,
	343	&fmt->height, 32, 480, 1, 0);
	344	fmt->field = V4L2_FIELD_NONE;
	345	fmt->colorspace = V4L2_COLORSPACE_SRGB;
27fe4a30 MCC	346
	347	return 0;
	348	}
	349
83053f7f MCC	350	static int mt9v011_g_parm(struct v4l2_subdev sd, struct v4l2_streamparm parms)
	351	{
	352	struct v4l2_captureparm *cp = &parms->parm.capture;
	353
	354	if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
	355	return -EINVAL;
	356
	357	memset(cp, 0, sizeof(struct v4l2_captureparm));
	358	cp->capability = V4L2_CAP_TIMEPERFRAME;
	359	calc_fps(sd,
	360	&cp->timeperframe.numerator,
	361	&cp->timeperframe.denominator);
	362
	363	return 0;
	364	}
	365
	366	static int mt9v011_s_parm(struct v4l2_subdev sd, struct v4l2_streamparm parms)
	367	{
	368	struct v4l2_captureparm *cp = &parms->parm.capture;
	369	struct v4l2_fract *tpf = &cp->timeperframe;
	370	u16 speed;
	371
	372	if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
	373	return -EINVAL;
	374	if (cp->extendedmode != 0)
	375	return -EINVAL;
	376
	377	speed = calc_speed(sd, tpf->numerator, tpf->denominator);
	378
	379	mt9v011_write(sd, R0A_MT9V011_CLK_SPEED, speed);
	380	v4l2_dbg(1, debug, sd, "Setting speed to %d\n", speed);
	381
	382	/* Recalculate and update fps info */
	383	calc_fps(sd, &tpf->numerator, &tpf->denominator);
	384
	385	return 0;
	386	}
	387
ea01b11a	388	static int mt9v011_s_mbus_fmt(struct v4l2_subdev sd, struct v4l2_mbus_framefmt fmt)
27fe4a30	389	{
27fe4a30 MCC	390	struct mt9v011 *core = to_mt9v011(sd);
	391	int rc;
	392
ea01b11a	393	rc = mt9v011_try_mbus_fmt(sd, fmt);
27fe4a30 MCC	394	if (rc < 0)
	395	return -EINVAL;
	396
ea01b11a HV	397	core->width = fmt->width;
ea01b11a HV	398	core->height = fmt->height;
27fe4a30 MCC	399
	400	set_res(sd);
	401
	402	return 0;
	403	}
	404
7dfba00d MCC	405	#ifdef CONFIG_VIDEO_ADV_DEBUG
	406	static int mt9v011_g_register(struct v4l2_subdev *sd,
	407	struct v4l2_dbg_register *reg)
	408	{
7dfba00d MCC	409	reg->val = mt9v011_read(sd, reg->reg & 0xff);
	410	reg->size = 2;
	411
	412	return 0;
	413	}
	414
	415	static int mt9v011_s_register(struct v4l2_subdev *sd,
977ba3b1	416	const struct v4l2_dbg_register *reg)
7dfba00d	417	{
7dfba00d MCC	418	mt9v011_write(sd, reg->reg & 0xff, reg->val & 0xffff);
	419
	420	return 0;
	421	}
	422	#endif
	423
ea01a83d HV	424	static int mt9v011_s_ctrl(struct v4l2_ctrl *ctrl)
	425	{
	426	struct mt9v011 *core =
	427	container_of(ctrl->handler, struct mt9v011, ctrls);
	428	struct v4l2_subdev *sd = &core->sd;
	429
	430	switch (ctrl->id) {
	431	case V4L2_CID_GAIN:
	432	core->global_gain = ctrl->val;
	433	break;
	434	case V4L2_CID_EXPOSURE:
	435	core->exposure = ctrl->val;
	436	break;
	437	case V4L2_CID_RED_BALANCE:
	438	core->red_bal = ctrl->val;
	439	break;
	440	case V4L2_CID_BLUE_BALANCE:
	441	core->blue_bal = ctrl->val;
	442	break;
	443	case V4L2_CID_HFLIP:
	444	core->hflip = ctrl->val;
	445	set_read_mode(sd);
	446	return 0;
	447	case V4L2_CID_VFLIP:
	448	core->vflip = ctrl->val;
	449	set_read_mode(sd);
	450	return 0;
	451	default:
	452	return -EINVAL;
	453	}
	454
	455	set_balance(sd);
	456	return 0;
	457	}
	458
	459	static struct v4l2_ctrl_ops mt9v011_ctrl_ops = {
7dfba00d	460	.s_ctrl = mt9v011_s_ctrl,
ea01a83d HV	461	};
	462
	463	static const struct v4l2_subdev_core_ops mt9v011_core_ops = {
7dfba00d	464	.reset = mt9v011_reset,
7dfba00d MCC	465	#ifdef CONFIG_VIDEO_ADV_DEBUG
	466	.g_register = mt9v011_g_register,
	467	.s_register = mt9v011_s_register,
	468	#endif
	469	};
	470
27fe4a30	471	static const struct v4l2_subdev_video_ops mt9v011_video_ops = {
ea01b11a HV	472	.enum_mbus_fmt = mt9v011_enum_mbus_fmt,
	473	.try_mbus_fmt = mt9v011_try_mbus_fmt,
	474	.s_mbus_fmt = mt9v011_s_mbus_fmt,
83053f7f MCC	475	.g_parm = mt9v011_g_parm,
83053f7f MCC	476	.s_parm = mt9v011_s_parm,
27fe4a30 MCC	477	};
27fe4a30 MCC	478
7dfba00d	479	static const struct v4l2_subdev_ops mt9v011_ops = {
27fe4a30 MCC	480	.core = &mt9v011_core_ops,
27fe4a30 MCC	481	.video = &mt9v011_video_ops,
7dfba00d MCC	482	};
	483
	484
	485	/****************************************************************************
	486	I2C Client & Driver
	487	****************************************************************************/
	488
	489	static int mt9v011_probe(struct i2c_client *c,
	490	const struct i2c_device_id *id)
	491	{
27fe4a30	492	u16 version;
7dfba00d MCC	493	struct mt9v011 *core;
	494	struct v4l2_subdev *sd;
	495
	496	/* Check if the adapter supports the needed features */
	497	if (!i2c_check_functionality(c->adapter,
	498	I2C_FUNC_SMBUS_READ_BYTE \| I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
	499	return -EIO;
	500
c02b211d	501	core = devm_kzalloc(&c->dev, sizeof(struct mt9v011), GFP_KERNEL);
7dfba00d MCC	502	if (!core)
	503	return -ENOMEM;
	504
7dfba00d MCC	505	sd = &core->sd;
7dfba00d MCC	506	v4l2_i2c_subdev_init(sd, c, &mt9v011_ops);
27fe4a30 MCC	507
	508	/* Check if the sensor is really a MT9V011 */
	509	version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);
296544e1 MCC	510	if ((version != MT9V011_VERSION) &&
	511	(version != MT9V011_REV_B_VERSION)) {
	512	v4l2_info(sd, "*** unknown micron chip detected (0x%04x).\n",
27fe4a30	513	version);
27fe4a30 MCC	514	return -EINVAL;
	515	}
	516
ea01a83d HV	517	v4l2_ctrl_handler_init(&core->ctrls, 5);
	518	v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,
	519	V4L2_CID_GAIN, 0, (1 << 12) - 1 - 0x20, 1, 0x20);
	520	v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,
	521	V4L2_CID_EXPOSURE, 0, 2047, 1, 0x01fc);
	522	v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,
	523	V4L2_CID_RED_BALANCE, -(1 << 9), (1 << 9) - 1, 1, 0);
	524	v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,
	525	V4L2_CID_BLUE_BALANCE, -(1 << 9), (1 << 9) - 1, 1, 0);
	526	v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,
	527	V4L2_CID_HFLIP, 0, 1, 1, 0);
	528	v4l2_ctrl_new_std(&core->ctrls, &mt9v011_ctrl_ops,
	529	V4L2_CID_VFLIP, 0, 1, 1, 0);
	530
	531	if (core->ctrls.error) {
	532	int ret = core->ctrls.error;
	533
	534	v4l2_err(sd, "control initialization error %d\n", ret);
	535	v4l2_ctrl_handler_free(&core->ctrls);
ea01a83d HV	536	return ret;
	537	}
	538	core->sd.ctrl_handler = &core->ctrls;
	539
27fe4a30	540	core->global_gain = 0x0024;
590929f3	541	core->exposure = 0x01fc;
27fe4a30 MCC	542	core->width = 640;
27fe4a30 MCC	543	core->height = 480;
e11206e6	544	core->xtal = 27000000; /* Hz */
27fe4a30	545
3c7c9370 HV	546	if (c->dev.platform_data) {
	547	struct mt9v011_platform_data *pdata = c->dev.platform_data;
	548
	549	core->xtal = pdata->xtal;
	550	v4l2_dbg(1, debug, sd, "xtal set to %d.%03d MHz\n",
	551	core->xtal / 1000000, (core->xtal / 1000) % 1000);
	552	}
	553
296544e1 MCC	554	v4l_info(c, "chip found @ 0x%02x (%s - chip version 0x%04x)\n",
296544e1 MCC	555	c->addr << 1, c->adapter->name, version);
7dfba00d MCC	556
	557	return 0;
	558	}
	559
	560	static int mt9v011_remove(struct i2c_client *c)
	561	{
	562	struct v4l2_subdev *sd = i2c_get_clientdata(c);
ea01a83d	563	struct mt9v011 *core = to_mt9v011(sd);
7dfba00d MCC	564
	565	v4l2_dbg(1, debug, sd,
	566	"mt9v011.c: removing mt9v011 adapter on address 0x%x\n",
	567	c->addr << 1);
	568
	569	v4l2_device_unregister_subdev(sd);
ea01a83d	570	v4l2_ctrl_handler_free(&core->ctrls);
c02b211d	571
7dfba00d MCC	572	return 0;
	573	}
	574
	575	/* ----------------------------------------------------------------------- */
	576
	577	static const struct i2c_device_id mt9v011_id[] = {
	578	{ "mt9v011", 0 },
	579	{ }
	580	};
	581	MODULE_DEVICE_TABLE(i2c, mt9v011_id);
	582
6ce58bea HV	583	static struct i2c_driver mt9v011_driver = {
	584	.driver = {
	585	.owner = THIS_MODULE,
	586	.name = "mt9v011",
	587	},
	588	.probe = mt9v011_probe,
	589	.remove = mt9v011_remove,
	590	.id_table = mt9v011_id,
7dfba00d	591	};
6ce58bea	592
c6e8d86f	593	module_i2c_driver(mt9v011_driver);