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

/*
 * mt9v011 -Micron 1/4-Inch VGA Digital Image Sensor
 *
 * Copyright (c) 2009 Mauro Carvalho Chehab (mchehab@redhat.com)
 * 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 <asm/div64.h>
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>
#include "mt9v011.h"

MODULE_DESCRIPTION("Micron mt9v011 sensor driver");
MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
MODULE_LICENSE("GPL");


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

/* supported controls */
static struct v4l2_queryctrl mt9v011_qctrl[] = {
	{
		.id = V4L2_CID_GAIN,
		.type = V4L2_CTRL_TYPE_INTEGER,
		.name = "Gain",
		.minimum = 0,
		.maximum = (1 << 10) - 1,
		.step = 1,
		.default_value = 0x0020,
		.flags = 0,
	}, {
		.id = V4L2_CID_RED_BALANCE,
		.type = V4L2_CTRL_TYPE_INTEGER,
		.name = "Red Balance",
		.minimum = -1 << 9,
		.maximum = (1 << 9) - 1,
		.step = 1,
		.default_value = 0,
		.flags = 0,
	}, {
		.id = V4L2_CID_BLUE_BALANCE,
		.type = V4L2_CTRL_TYPE_INTEGER,
		.name = "Blue Balance",
		.minimum = -1 << 9,
		.maximum = (1 << 9) - 1,
		.step = 1,
		.default_value = 0,
		.flags = 0,
	}, {
		.id      = V4L2_CID_HFLIP,
		.type    = V4L2_CTRL_TYPE_BOOLEAN,
		.name    = "Mirror",
		.minimum = 0,
		.maximum = 1,
		.step    = 1,
		.default_value = 0,
		.flags = 0,
	}, {
		.id      = V4L2_CID_VFLIP,
		.type    = V4L2_CTRL_TYPE_BOOLEAN,
		.name    = "Vflip",
		.minimum = 0,
		.maximum = 1,
		.step    = 1,
		.default_value = 0,
		.flags = 0,
	}, {
	}
};

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

	u16 global_gain, 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 void set_balance(struct v4l2_subdev *sd)
{
	struct mt9v011 *core = to_mt9v011(sd);
	u16 green1_gain, green2_gain, blue_gain, red_gain;

	green1_gain = core->global_gain;
	green2_gain = core->global_gain;

	blue_gain = core->global_gain +
		    core->global_gain * core->blue_bal / (1 << 9);

	red_gain = core->global_gain +
		   core->global_gain * core->blue_bal / (1 << 9);

	mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green1_gain);
	mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN,  green1_gain);
	mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain);
	mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain);
}

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 = 14 + (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_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
	struct mt9v011 *core = to_mt9v011(sd);

	v4l2_dbg(1, debug, sd, "g_ctrl called\n");

	switch (ctrl->id) {
	case V4L2_CID_GAIN:
		ctrl->value = core->global_gain;
		return 0;
	case V4L2_CID_RED_BALANCE:
		ctrl->value = core->red_bal;
		return 0;
	case V4L2_CID_BLUE_BALANCE:
		ctrl->value = core->blue_bal;
		return 0;
	case V4L2_CID_HFLIP:
		ctrl->value = core->hflip ? 1 : 0;
		return 0;
	case V4L2_CID_VFLIP:
		ctrl->value = core->vflip ? 1 : 0;
		return 0;
	}
	return -EINVAL;
}

static int mt9v011_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
{
	int i;

	v4l2_dbg(1, debug, sd, "queryctrl called\n");

	for (i = 0; i < ARRAY_SIZE(mt9v011_qctrl); i++)
		if (qc->id && qc->id == mt9v011_qctrl[i].id) {
			memcpy(qc, &(mt9v011_qctrl[i]),
			       sizeof(*qc));
			return 0;
		}

	return -EINVAL;
}


static int mt9v011_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
	struct mt9v011 *core = to_mt9v011(sd);
	u8 i, n;
	n = ARRAY_SIZE(mt9v011_qctrl);

	for (i = 0; i < n; i++) {
		if (ctrl->id != mt9v011_qctrl[i].id)
			continue;
		if (ctrl->value < mt9v011_qctrl[i].minimum ||
		    ctrl->value > mt9v011_qctrl[i].maximum)
			return -ERANGE;
		v4l2_dbg(1, debug, sd, "s_ctrl: id=%d, value=%d\n",
					ctrl->id, ctrl->value);
		break;
	}

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

	set_balance(sd);

	return 0;
}

static int mt9v011_enum_mbus_fmt(struct v4l2_subdev *sd, unsigned index,
					enum v4l2_mbus_pixelcode *code)
{
	if (index > 0)
		return -EINVAL;

	*code = V4L2_MBUS_FMT_SGRBG8_1X8;
	return 0;
}

static int mt9v011_try_mbus_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *fmt)
{
	if (fmt->code != V4L2_MBUS_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;
}

static int mt9v011_s_config(struct v4l2_subdev *sd, int dumb, void *data)
{
	struct mt9v011 *core = to_mt9v011(sd);
	unsigned *xtal = data;

	v4l2_dbg(1, debug, sd, "s_config called\n");

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

	return 0;
}


#ifdef CONFIG_VIDEO_ADV_DEBUG
static int mt9v011_g_register(struct v4l2_subdev *sd,
			      struct v4l2_dbg_register *reg)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	if (!v4l2_chip_match_i2c_client(client, &reg->match))
		return -EINVAL;
	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;

	reg->val = mt9v011_read(sd, reg->reg & 0xff);
	reg->size = 2;

	return 0;
}

static int mt9v011_s_register(struct v4l2_subdev *sd,
			      struct v4l2_dbg_register *reg)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	if (!v4l2_chip_match_i2c_client(client, &reg->match))
		return -EINVAL;
	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;

	mt9v011_write(sd, reg->reg & 0xff, reg->val & 0xffff);

	return 0;
}
#endif

static int mt9v011_g_chip_ident(struct v4l2_subdev *sd,
				struct v4l2_dbg_chip_ident *chip)
{
	u16 version;
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);

	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_MT9V011,
					  version);
}

static const struct v4l2_subdev_core_ops mt9v011_core_ops = {
	.queryctrl = mt9v011_queryctrl,
	.g_ctrl = mt9v011_g_ctrl,
	.s_ctrl = mt9v011_s_ctrl,
	.reset = mt9v011_reset,
	.s_config = mt9v011_s_config,
	.g_chip_ident = mt9v011_g_chip_ident,
#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 = kzalloc(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);
		kfree(core);
		return -EINVAL;
	}

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

	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);

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

	v4l2_device_unregister_subdev(sd);
	kfree(to_mt9v011(sd));
	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,
};

static __init int init_mt9v011(void)
{
	return i2c_add_driver(&mt9v011_driver);
}

static __exit void exit_mt9v011(void)
{
	i2c_del_driver(&mt9v011_driver);
}

module_init(init_mt9v011);
module_exit(exit_mt9v011);
Commit	Line	Data
7dfba00d MCC	1	/*
	2	* mt9v011 -Micron 1/4-Inch VGA Digital Image Sensor
	3	*
	4	* Copyright (c) 2009 Mauro Carvalho Chehab (mchehab@redhat.com)
	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>
e11206e6	12	#include <asm/div64.h>
7dfba00d	13	#include <media/v4l2-device.h>
7dfba00d	14	#include <media/v4l2-chip-ident.h>
6ce58bea	15	#include "mt9v011.h"
7dfba00d MCC	16
	17	MODULE_DESCRIPTION("Micron mt9v011 sensor driver");
	18	MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
	19	MODULE_LICENSE("GPL");
	20
	21
	22	static int debug;
	23	module_param(debug, int, 0);
	24	MODULE_PARM_DESC(debug, "Debug level (0-2)");
	25
	26	/* supported controls */
	27	static struct v4l2_queryctrl mt9v011_qctrl[] = {
	28	{
	29	.id = V4L2_CID_GAIN,
	30	.type = V4L2_CTRL_TYPE_INTEGER,
	31	.name = "Gain",
	32	.minimum = 0,
	33	.maximum = (1 << 10) - 1,
	34	.step = 1,
	35	.default_value = 0x0020,
	36	.flags = 0,
	37	}, {
	38	.id = V4L2_CID_RED_BALANCE,
	39	.type = V4L2_CTRL_TYPE_INTEGER,
	40	.name = "Red Balance",
	41	.minimum = -1 << 9,
	42	.maximum = (1 << 9) - 1,
	43	.step = 1,
	44	.default_value = 0,
	45	.flags = 0,
	46	}, {
	47	.id = V4L2_CID_BLUE_BALANCE,
	48	.type = V4L2_CTRL_TYPE_INTEGER,
	49	.name = "Blue Balance",
	50	.minimum = -1 << 9,
	51	.maximum = (1 << 9) - 1,
	52	.step = 1,
	53	.default_value = 0,
	54	.flags = 0,
2526ea6e MCC	55	}, {
	56	.id = V4L2_CID_HFLIP,
	57	.type = V4L2_CTRL_TYPE_BOOLEAN,
	58	.name = "Mirror",
	59	.minimum = 0,
	60	.maximum = 1,
	61	.step = 1,
	62	.default_value = 0,
	63	.flags = 0,
	64	}, {
	65	.id = V4L2_CID_VFLIP,
	66	.type = V4L2_CTRL_TYPE_BOOLEAN,
	67	.name = "Vflip",
	68	.minimum = 0,
	69	.maximum = 1,
	70	.step = 1,
	71	.default_value = 0,
	72	.flags = 0,
	73	}, {
	74	}
7dfba00d MCC	75	};
	76
	77	struct mt9v011 {
	78	struct v4l2_subdev sd;
27fe4a30	79	unsigned width, height;
e11206e6	80	unsigned xtal;
2526ea6e MCC	81	unsigned hflip:1;
2526ea6e MCC	82	unsigned vflip:1;
7dfba00d MCC	83
	84	u16 global_gain, red_bal, blue_bal;
	85	};
	86
	87	static inline struct mt9v011 to_mt9v011(struct v4l2_subdev sd)
	88	{
	89	return container_of(sd, struct mt9v011, sd);
	90	}
	91
	92	static int mt9v011_read(struct v4l2_subdev *sd, unsigned char addr)
	93	{
	94	struct i2c_client *c = v4l2_get_subdevdata(sd);
	95	__be16 buffer;
	96	int rc, val;
	97
fbe2800c MCC	98	rc = i2c_master_send(c, &addr, 1);
fbe2800c MCC	99	if (rc != 1)
7dfba00d MCC	100	v4l2_dbg(0, debug, sd,
	101	"i2c i/o error: rc == %d (should be 1)\n", rc);
	102
	103	msleep(10);
	104
fbe2800c MCC	105	rc = i2c_master_recv(c, (char *)&buffer, 2);
fbe2800c MCC	106	if (rc != 2)
7dfba00d	107	v4l2_dbg(0, debug, sd,
fbe2800c	108	"i2c i/o error: rc == %d (should be 2)\n", rc);
7dfba00d MCC	109
	110	val = be16_to_cpu(buffer);
	111
	112	v4l2_dbg(2, debug, sd, "mt9v011: read 0x%02x = 0x%04x\n", addr, val);
	113
	114	return val;
	115	}
	116
	117	static void mt9v011_write(struct v4l2_subdev *sd, unsigned char addr,
	118	u16 value)
	119	{
	120	struct i2c_client *c = v4l2_get_subdevdata(sd);
	121	unsigned char buffer[3];
	122	int rc;
	123
	124	buffer[0] = addr;
	125	buffer[1] = value >> 8;
	126	buffer[2] = value & 0xff;
	127
	128	v4l2_dbg(2, debug, sd,
	129	"mt9v011: writing 0x%02x 0x%04x\n", buffer[0], value);
27fe4a30	130	rc = i2c_master_send(c, buffer, 3);
fbe2800c	131	if (rc != 3)
7dfba00d MCC	132	v4l2_dbg(0, debug, sd,
	133	"i2c i/o error: rc == %d (should be 3)\n", rc);
	134	}
	135
	136
	137	struct i2c_reg_value {
	138	unsigned char reg;
	139	u16 value;
	140	};
	141
	142	/*
	143	* Values used at the original driver
	144	* Some values are marked as Reserved at the datasheet
	145	*/
	146	static const struct i2c_reg_value mt9v011_init_default[] = {
7dfba00d MCC	147	{ R0D_MT9V011_RESET, 0x0001 },
7dfba00d MCC	148	{ R0D_MT9V011_RESET, 0x0000 },
afe09f82	149
afe09f82	150	{ R0C_MT9V011_SHUTTER_DELAY, 0x0000 },
6934e6ff MCC	151	{ R09_MT9V011_SHUTTER_WIDTH, 0x1fc },
	152
	153	{ R0A_MT9V011_CLK_SPEED, 0x0000 },
afe09f82	154	{ R1E_MT9V011_DIGITAL_ZOOM, 0x0000 },
afe09f82	155
e11206e6	156	{ R07_MT9V011_OUT_CTRL, 0x0002 }, /* chip enable */
7dfba00d MCC	157	};
	158
	159	static void set_balance(struct v4l2_subdev *sd)
	160	{
	161	struct mt9v011 *core = to_mt9v011(sd);
	162	u16 green1_gain, green2_gain, blue_gain, red_gain;
	163
	164	green1_gain = core->global_gain;
	165	green2_gain = core->global_gain;
	166
	167	blue_gain = core->global_gain +
	168	core->global_gain * core->blue_bal / (1 << 9);
	169
	170	red_gain = core->global_gain +
	171	core->global_gain * core->blue_bal / (1 << 9);
	172
	173	mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green1_gain);
	174	mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN, green1_gain);
	175	mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain);
	176	mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain);
	177	}
	178
83053f7f	179	static void calc_fps(struct v4l2_subdev sd, u32 numerator, u32 *denominator)
e11206e6 MCC	180	{
	181	struct mt9v011 *core = to_mt9v011(sd);
	182	unsigned height, width, hblank, vblank, speed;
	183	unsigned row_time, t_time;
	184	u64 frames_per_ms;
	185	unsigned tmp;
	186
	187	height = mt9v011_read(sd, R03_MT9V011_HEIGHT);
	188	width = mt9v011_read(sd, R04_MT9V011_WIDTH);
	189	hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);
	190	vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);
	191	speed = mt9v011_read(sd, R0A_MT9V011_CLK_SPEED);
	192
	193	row_time = (width + 113 + hblank) * (speed + 2);
	194	t_time = row_time * (height + vblank + 1);
	195
	196	frames_per_ms = core->xtal * 1000l;
	197	do_div(frames_per_ms, t_time);
	198	tmp = frames_per_ms;
	199
	200	v4l2_dbg(1, debug, sd, "Programmed to %u.%03u fps (%d pixel clcks)\n",
	201	tmp / 1000, tmp % 1000, t_time);
83053f7f MCC	202
	203	if (numerator && denominator) {
	204	*numerator = 1000;
	205	*denominator = (u32)frames_per_ms;
	206	}
	207	}
	208
	209	static u16 calc_speed(struct v4l2_subdev *sd, u32 numerator, u32 denominator)
	210	{
	211	struct mt9v011 *core = to_mt9v011(sd);
	212	unsigned height, width, hblank, vblank;
	213	unsigned row_time, line_time;
	214	u64 t_time, speed;
	215
	216	/* Avoid bogus calculus */
	217	if (!numerator \|\| !denominator)
	218	return 0;
	219
	220	height = mt9v011_read(sd, R03_MT9V011_HEIGHT);
	221	width = mt9v011_read(sd, R04_MT9V011_WIDTH);
	222	hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);
	223	vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);
	224
	225	row_time = width + 113 + hblank;
	226	line_time = height + vblank + 1;
	227
	228	t_time = core->xtal * ((u64)numerator);
	229	/* round to the closest value */
	230	t_time += denominator / 2;
	231	do_div(t_time, denominator);
	232
	233	speed = t_time;
	234	do_div(speed, row_time * line_time);
	235
	236	/* Avoid having a negative value for speed */
	237	if (speed < 2)
	238	speed = 0;
	239	else
	240	speed -= 2;
	241
	242	/* Avoid speed overflow */
	243	if (speed > 15)
	244	return 15;
	245
	246	return (u16)speed;
e11206e6 MCC	247	}
e11206e6 MCC	248
27fe4a30 MCC	249	static void set_res(struct v4l2_subdev *sd)
	250	{
	251	struct mt9v011 *core = to_mt9v011(sd);
	252	unsigned vstart, hstart;
	253
	254	/*
	255	* The mt9v011 doesn't have scaling. So, in order to select the desired
	256	* resolution, we're cropping at the middle of the sensor.
	257	* hblank and vblank should be adjusted, in order to warrant that
	258	* we'll preserve the line timings for 30 fps, no matter what resolution
	259	* is selected.
6934e6ff MCC	260	* NOTE: datasheet says that width (and height) should be filled with
	261	* width-1. However, this doesn't work, since one pixel per line will
	262	* be missing.
27fe4a30 MCC	263	*/
	264
	265	hstart = 14 + (640 - core->width) / 2;
	266	mt9v011_write(sd, R02_MT9V011_COLSTART, hstart);
	267	mt9v011_write(sd, R04_MT9V011_WIDTH, core->width);
	268	mt9v011_write(sd, R05_MT9V011_HBLANK, 771 - core->width);
	269
c180604a	270	vstart = 8 + (480 - core->height) / 2;
27fe4a30 MCC	271	mt9v011_write(sd, R01_MT9V011_ROWSTART, vstart);
	272	mt9v011_write(sd, R03_MT9V011_HEIGHT, core->height);
	273	mt9v011_write(sd, R06_MT9V011_VBLANK, 508 - core->height);
e11206e6	274
83053f7f	275	calc_fps(sd, NULL, NULL);
27fe4a30 MCC	276	};
27fe4a30 MCC	277
2526ea6e MCC	278	static void set_read_mode(struct v4l2_subdev *sd)
	279	{
	280	struct mt9v011 *core = to_mt9v011(sd);
	281	unsigned mode = 0x1000;
	282
	283	if (core->hflip)
	284	mode \|= 0x4000;
	285
	286	if (core->vflip)
	287	mode \|= 0x8000;
	288
	289	mt9v011_write(sd, R20_MT9V011_READ_MODE, mode);
	290	}
	291
7dfba00d MCC	292	static int mt9v011_reset(struct v4l2_subdev *sd, u32 val)
7dfba00d MCC	293	{
7dfba00d MCC	294	int i;
7dfba00d MCC	295
7dfba00d MCC	296	for (i = 0; i < ARRAY_SIZE(mt9v011_init_default); i++)
	297	mt9v011_write(sd, mt9v011_init_default[i].reg,
	298	mt9v011_init_default[i].value);
	299
	300	set_balance(sd);
27fe4a30	301	set_res(sd);
2526ea6e	302	set_read_mode(sd);
7dfba00d MCC	303
	304	return 0;
	305	};
	306
	307	static int mt9v011_g_ctrl(struct v4l2_subdev sd, struct v4l2_control ctrl)
	308	{
	309	struct mt9v011 *core = to_mt9v011(sd);
	310
	311	v4l2_dbg(1, debug, sd, "g_ctrl called\n");
	312
	313	switch (ctrl->id) {
	314	case V4L2_CID_GAIN:
	315	ctrl->value = core->global_gain;
	316	return 0;
	317	case V4L2_CID_RED_BALANCE:
	318	ctrl->value = core->red_bal;
	319	return 0;
	320	case V4L2_CID_BLUE_BALANCE:
	321	ctrl->value = core->blue_bal;
	322	return 0;
2526ea6e MCC	323	case V4L2_CID_HFLIP:
	324	ctrl->value = core->hflip ? 1 : 0;
	325	return 0;
	326	case V4L2_CID_VFLIP:
	327	ctrl->value = core->vflip ? 1 : 0;
	328	return 0;
7dfba00d MCC	329	}
	330	return -EINVAL;
	331	}
	332
9873740b MCC	333	static int mt9v011_queryctrl(struct v4l2_subdev sd, struct v4l2_queryctrl qc)
	334	{
	335	int i;
	336
	337	v4l2_dbg(1, debug, sd, "queryctrl called\n");
	338
	339	for (i = 0; i < ARRAY_SIZE(mt9v011_qctrl); i++)
	340	if (qc->id && qc->id == mt9v011_qctrl[i].id) {
	341	memcpy(qc, &(mt9v011_qctrl[i]),
	342	sizeof(*qc));
	343	return 0;
	344	}
	345
	346	return -EINVAL;
	347	}
	348
	349
7dfba00d MCC	350	static int mt9v011_s_ctrl(struct v4l2_subdev sd, struct v4l2_control ctrl)
	351	{
	352	struct mt9v011 *core = to_mt9v011(sd);
	353	u8 i, n;
	354	n = ARRAY_SIZE(mt9v011_qctrl);
	355
	356	for (i = 0; i < n; i++) {
	357	if (ctrl->id != mt9v011_qctrl[i].id)
	358	continue;
	359	if (ctrl->value < mt9v011_qctrl[i].minimum \|\|
	360	ctrl->value > mt9v011_qctrl[i].maximum)
	361	return -ERANGE;
	362	v4l2_dbg(1, debug, sd, "s_ctrl: id=%d, value=%d\n",
	363	ctrl->id, ctrl->value);
	364	break;
	365	}
	366
	367	switch (ctrl->id) {
	368	case V4L2_CID_GAIN:
	369	core->global_gain = ctrl->value;
	370	break;
	371	case V4L2_CID_RED_BALANCE:
	372	core->red_bal = ctrl->value;
	373	break;
	374	case V4L2_CID_BLUE_BALANCE:
	375	core->blue_bal = ctrl->value;
	376	break;
2526ea6e MCC	377	case V4L2_CID_HFLIP:
	378	core->hflip = ctrl->value;
	379	set_read_mode(sd);
	380	return 0;
	381	case V4L2_CID_VFLIP:
	382	core->vflip = ctrl->value;
	383	set_read_mode(sd);
	384	return 0;
7dfba00d MCC	385	default:
	386	return -EINVAL;
	387	}
	388
	389	set_balance(sd);
	390
	391	return 0;
	392	}
	393
ea01b11a HV	394	static int mt9v011_enum_mbus_fmt(struct v4l2_subdev *sd, unsigned index,
ea01b11a HV	395	enum v4l2_mbus_pixelcode *code)
27fe4a30	396	{
ea01b11a	397	if (index > 0)
27fe4a30 MCC	398	return -EINVAL;
27fe4a30 MCC	399
ea01b11a	400	*code = V4L2_MBUS_FMT_SGRBG8_1X8;
27fe4a30 MCC	401	return 0;
	402	}
	403
ea01b11a	404	static int mt9v011_try_mbus_fmt(struct v4l2_subdev sd, struct v4l2_mbus_framefmt fmt)
27fe4a30	405	{
ea01b11a	406	if (fmt->code != V4L2_MBUS_FMT_SGRBG8_1X8)
27fe4a30 MCC	407	return -EINVAL;
27fe4a30 MCC	408
ea01b11a HV	409	v4l_bound_align_image(&fmt->width, 48, 639, 1,
	410	&fmt->height, 32, 480, 1, 0);
	411	fmt->field = V4L2_FIELD_NONE;
	412	fmt->colorspace = V4L2_COLORSPACE_SRGB;
27fe4a30 MCC	413
	414	return 0;
	415	}
	416
83053f7f MCC	417	static int mt9v011_g_parm(struct v4l2_subdev sd, struct v4l2_streamparm parms)
	418	{
	419	struct v4l2_captureparm *cp = &parms->parm.capture;
	420
	421	if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
	422	return -EINVAL;
	423
	424	memset(cp, 0, sizeof(struct v4l2_captureparm));
	425	cp->capability = V4L2_CAP_TIMEPERFRAME;
	426	calc_fps(sd,
	427	&cp->timeperframe.numerator,
	428	&cp->timeperframe.denominator);
	429
	430	return 0;
	431	}
	432
	433	static int mt9v011_s_parm(struct v4l2_subdev sd, struct v4l2_streamparm parms)
	434	{
	435	struct v4l2_captureparm *cp = &parms->parm.capture;
	436	struct v4l2_fract *tpf = &cp->timeperframe;
	437	u16 speed;
	438
	439	if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
	440	return -EINVAL;
	441	if (cp->extendedmode != 0)
	442	return -EINVAL;
	443
	444	speed = calc_speed(sd, tpf->numerator, tpf->denominator);
	445
	446	mt9v011_write(sd, R0A_MT9V011_CLK_SPEED, speed);
	447	v4l2_dbg(1, debug, sd, "Setting speed to %d\n", speed);
	448
	449	/* Recalculate and update fps info */
	450	calc_fps(sd, &tpf->numerator, &tpf->denominator);
	451
	452	return 0;
	453	}
	454
ea01b11a	455	static int mt9v011_s_mbus_fmt(struct v4l2_subdev sd, struct v4l2_mbus_framefmt fmt)
27fe4a30	456	{
27fe4a30 MCC	457	struct mt9v011 *core = to_mt9v011(sd);
	458	int rc;
	459
ea01b11a	460	rc = mt9v011_try_mbus_fmt(sd, fmt);
27fe4a30 MCC	461	if (rc < 0)
	462	return -EINVAL;
	463
ea01b11a HV	464	core->width = fmt->width;
ea01b11a HV	465	core->height = fmt->height;
27fe4a30 MCC	466
	467	set_res(sd);
	468
	469	return 0;
	470	}
	471
2ea472ff MCC	472	static int mt9v011_s_config(struct v4l2_subdev sd, int dumb, void data)
	473	{
	474	struct mt9v011 *core = to_mt9v011(sd);
	475	unsigned *xtal = data;
	476
	477	v4l2_dbg(1, debug, sd, "s_config called\n");
	478
	479	if (xtal) {
	480	core->xtal = *xtal;
	481	v4l2_dbg(1, debug, sd, "xtal set to %d.%03d MHz\n",
	482	xtal / 1000000, (xtal / 1000) % 1000);
	483	}
	484
	485	return 0;
	486	}
	487
27fe4a30	488
7dfba00d MCC	489	#ifdef CONFIG_VIDEO_ADV_DEBUG
	490	static int mt9v011_g_register(struct v4l2_subdev *sd,
	491	struct v4l2_dbg_register *reg)
	492	{
	493	struct i2c_client *client = v4l2_get_subdevdata(sd);
	494
	495	if (!v4l2_chip_match_i2c_client(client, &reg->match))
	496	return -EINVAL;
	497	if (!capable(CAP_SYS_ADMIN))
	498	return -EPERM;
	499
	500	reg->val = mt9v011_read(sd, reg->reg & 0xff);
	501	reg->size = 2;
	502
	503	return 0;
	504	}
	505
	506	static int mt9v011_s_register(struct v4l2_subdev *sd,
	507	struct v4l2_dbg_register *reg)
	508	{
	509	struct i2c_client *client = v4l2_get_subdevdata(sd);
	510
	511	if (!v4l2_chip_match_i2c_client(client, &reg->match))
	512	return -EINVAL;
	513	if (!capable(CAP_SYS_ADMIN))
	514	return -EPERM;
	515
	516	mt9v011_write(sd, reg->reg & 0xff, reg->val & 0xffff);
	517
	518	return 0;
	519	}
	520	#endif
	521
	522	static int mt9v011_g_chip_ident(struct v4l2_subdev *sd,
	523	struct v4l2_dbg_chip_ident *chip)
	524	{
296544e1	525	u16 version;
7dfba00d MCC	526	struct i2c_client *client = v4l2_get_subdevdata(sd);
7dfba00d MCC	527
296544e1 MCC	528	version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);
296544e1 MCC	529
7dfba00d	530	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_MT9V011,
296544e1	531	version);
7dfba00d MCC	532	}
	533
	534	static const struct v4l2_subdev_core_ops mt9v011_core_ops = {
9873740b	535	.queryctrl = mt9v011_queryctrl,
7dfba00d MCC	536	.g_ctrl = mt9v011_g_ctrl,
	537	.s_ctrl = mt9v011_s_ctrl,
	538	.reset = mt9v011_reset,
2ea472ff	539	.s_config = mt9v011_s_config,
7dfba00d MCC	540	.g_chip_ident = mt9v011_g_chip_ident,
	541	#ifdef CONFIG_VIDEO_ADV_DEBUG
	542	.g_register = mt9v011_g_register,
	543	.s_register = mt9v011_s_register,
	544	#endif
	545	};
	546
27fe4a30	547	static const struct v4l2_subdev_video_ops mt9v011_video_ops = {
ea01b11a HV	548	.enum_mbus_fmt = mt9v011_enum_mbus_fmt,
	549	.try_mbus_fmt = mt9v011_try_mbus_fmt,
	550	.s_mbus_fmt = mt9v011_s_mbus_fmt,
83053f7f MCC	551	.g_parm = mt9v011_g_parm,
83053f7f MCC	552	.s_parm = mt9v011_s_parm,
27fe4a30 MCC	553	};
27fe4a30 MCC	554
7dfba00d	555	static const struct v4l2_subdev_ops mt9v011_ops = {
27fe4a30 MCC	556	.core = &mt9v011_core_ops,
27fe4a30 MCC	557	.video = &mt9v011_video_ops,
7dfba00d MCC	558	};
	559
	560
	561	/****************************************************************************
	562	I2C Client & Driver
	563	****************************************************************************/
	564
	565	static int mt9v011_probe(struct i2c_client *c,
	566	const struct i2c_device_id *id)
	567	{
27fe4a30	568	u16 version;
7dfba00d MCC	569	struct mt9v011 *core;
	570	struct v4l2_subdev *sd;
	571
	572	/* Check if the adapter supports the needed features */
	573	if (!i2c_check_functionality(c->adapter,
	574	I2C_FUNC_SMBUS_READ_BYTE \| I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
	575	return -EIO;
	576
	577	core = kzalloc(sizeof(struct mt9v011), GFP_KERNEL);
	578	if (!core)
	579	return -ENOMEM;
	580
7dfba00d MCC	581	sd = &core->sd;
7dfba00d MCC	582	v4l2_i2c_subdev_init(sd, c, &mt9v011_ops);
27fe4a30 MCC	583
	584	/* Check if the sensor is really a MT9V011 */
	585	version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);
296544e1 MCC	586	if ((version != MT9V011_VERSION) &&
	587	(version != MT9V011_REV_B_VERSION)) {
	588	v4l2_info(sd, "*** unknown micron chip detected (0x%04x).\n",
27fe4a30 MCC	589	version);
	590	kfree(core);
	591	return -EINVAL;
	592	}
	593
	594	core->global_gain = 0x0024;
	595	core->width = 640;
	596	core->height = 480;
e11206e6	597	core->xtal = 27000000; /* Hz */
27fe4a30	598
296544e1 MCC	599	v4l_info(c, "chip found @ 0x%02x (%s - chip version 0x%04x)\n",
296544e1 MCC	600	c->addr << 1, c->adapter->name, version);
7dfba00d MCC	601
	602	return 0;
	603	}
	604
	605	static int mt9v011_remove(struct i2c_client *c)
	606	{
	607	struct v4l2_subdev *sd = i2c_get_clientdata(c);
	608
	609	v4l2_dbg(1, debug, sd,
	610	"mt9v011.c: removing mt9v011 adapter on address 0x%x\n",
	611	c->addr << 1);
	612
	613	v4l2_device_unregister_subdev(sd);
	614	kfree(to_mt9v011(sd));
	615	return 0;
	616	}
	617
	618	/* ----------------------------------------------------------------------- */
	619
	620	static const struct i2c_device_id mt9v011_id[] = {
	621	{ "mt9v011", 0 },
	622	{ }
	623	};
	624	MODULE_DEVICE_TABLE(i2c, mt9v011_id);
	625
6ce58bea HV	626	static struct i2c_driver mt9v011_driver = {
	627	.driver = {
	628	.owner = THIS_MODULE,
	629	.name = "mt9v011",
	630	},
	631	.probe = mt9v011_probe,
	632	.remove = mt9v011_remove,
	633	.id_table = mt9v011_id,
7dfba00d	634	};
6ce58bea HV	635
	636	static __init int init_mt9v011(void)
	637	{
	638	return i2c_add_driver(&mt9v011_driver);
	639	}
	640
	641	static __exit void exit_mt9v011(void)
	642	{
	643	i2c_del_driver(&mt9v011_driver);
	644	}
	645
	646	module_init(init_mt9v011);
	647	module_exit(exit_mt9v011);