[net-next-2.6.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 "mt9v011.h"
#include <media/v4l2-i2c-drv.h>
#include <media/v4l2-chip-ident.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_fmt(struct v4l2_subdev *sd, struct v4l2_fmtdesc *fmt)
{
	if (fmt->index > 0)
		return -EINVAL;

	fmt->flags = 0;
	strcpy(fmt->description, "8 bpp Bayer GRGR..BGBG");
	fmt->pixelformat = V4L2_PIX_FMT_SGRBG8;

	return 0;
}

static int mt9v011_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
{
	struct v4l2_pix_format *pix = &fmt->fmt.pix;

	if (pix->pixelformat != V4L2_PIX_FMT_SGRBG8)
		return -EINVAL;

	v4l_bound_align_image(&pix->width, 48, 639, 1,
			      &pix->height, 32, 480, 1, 0);

	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_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
{
	struct v4l2_pix_format *pix = &fmt->fmt.pix;
	struct mt9v011 *core = to_mt9v011(sd);
	int rc;

	rc = mt9v011_try_fmt(sd, fmt);
	if (rc < 0)
		return -EINVAL;

	core->width = pix->width;
	core->height = pix->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_fmt = mt9v011_enum_fmt,
	.try_fmt = mt9v011_try_fmt,
	.s_fmt = mt9v011_s_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 v4l2_i2c_driver_data v4l2_i2c_data = {
	.name = "mt9v011",
	.probe = mt9v011_probe,
	.remove = mt9v011_remove,
	.id_table = mt9v011_id,
};
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 MCC	13	#include <media/v4l2-device.h>
	14	#include "mt9v011.h"
	15	#include <media/v4l2-i2c-drv.h>
	16	#include <media/v4l2-chip-ident.h>
	17
	18	MODULE_DESCRIPTION("Micron mt9v011 sensor driver");
	19	MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
	20	MODULE_LICENSE("GPL");
	21
	22
	23	static int debug;
	24	module_param(debug, int, 0);
	25	MODULE_PARM_DESC(debug, "Debug level (0-2)");
	26
	27	/* supported controls */
	28	static struct v4l2_queryctrl mt9v011_qctrl[] = {
	29	{
	30	.id = V4L2_CID_GAIN,
	31	.type = V4L2_CTRL_TYPE_INTEGER,
	32	.name = "Gain",
	33	.minimum = 0,
	34	.maximum = (1 << 10) - 1,
	35	.step = 1,
	36	.default_value = 0x0020,
	37	.flags = 0,
	38	}, {
	39	.id = V4L2_CID_RED_BALANCE,
	40	.type = V4L2_CTRL_TYPE_INTEGER,
	41	.name = "Red Balance",
	42	.minimum = -1 << 9,
	43	.maximum = (1 << 9) - 1,
	44	.step = 1,
	45	.default_value = 0,
	46	.flags = 0,
	47	}, {
	48	.id = V4L2_CID_BLUE_BALANCE,
	49	.type = V4L2_CTRL_TYPE_INTEGER,
	50	.name = "Blue Balance",
	51	.minimum = -1 << 9,
	52	.maximum = (1 << 9) - 1,
	53	.step = 1,
	54	.default_value = 0,
	55	.flags = 0,
2526ea6e MCC	56	}, {
	57	.id = V4L2_CID_HFLIP,
	58	.type = V4L2_CTRL_TYPE_BOOLEAN,
	59	.name = "Mirror",
	60	.minimum = 0,
	61	.maximum = 1,
	62	.step = 1,
	63	.default_value = 0,
	64	.flags = 0,
	65	}, {
	66	.id = V4L2_CID_VFLIP,
	67	.type = V4L2_CTRL_TYPE_BOOLEAN,
	68	.name = "Vflip",
	69	.minimum = 0,
	70	.maximum = 1,
	71	.step = 1,
	72	.default_value = 0,
	73	.flags = 0,
	74	}, {
	75	}
7dfba00d MCC	76	};
	77
	78	struct mt9v011 {
	79	struct v4l2_subdev sd;
27fe4a30	80	unsigned width, height;
e11206e6	81	unsigned xtal;
2526ea6e MCC	82	unsigned hflip:1;
2526ea6e MCC	83	unsigned vflip:1;
7dfba00d MCC	84
	85	u16 global_gain, red_bal, blue_bal;
	86	};
	87
	88	static inline struct mt9v011 to_mt9v011(struct v4l2_subdev sd)
	89	{
	90	return container_of(sd, struct mt9v011, sd);
	91	}
	92
	93	static int mt9v011_read(struct v4l2_subdev *sd, unsigned char addr)
	94	{
	95	struct i2c_client *c = v4l2_get_subdevdata(sd);
	96	__be16 buffer;
	97	int rc, val;
	98
fbe2800c MCC	99	rc = i2c_master_send(c, &addr, 1);
fbe2800c MCC	100	if (rc != 1)
7dfba00d MCC	101	v4l2_dbg(0, debug, sd,
	102	"i2c i/o error: rc == %d (should be 1)\n", rc);
	103
	104	msleep(10);
	105
fbe2800c MCC	106	rc = i2c_master_recv(c, (char *)&buffer, 2);
fbe2800c MCC	107	if (rc != 2)
7dfba00d	108	v4l2_dbg(0, debug, sd,
fbe2800c	109	"i2c i/o error: rc == %d (should be 2)\n", rc);
7dfba00d MCC	110
	111	val = be16_to_cpu(buffer);
	112
	113	v4l2_dbg(2, debug, sd, "mt9v011: read 0x%02x = 0x%04x\n", addr, val);
	114
	115	return val;
	116	}
	117
	118	static void mt9v011_write(struct v4l2_subdev *sd, unsigned char addr,
	119	u16 value)
	120	{
	121	struct i2c_client *c = v4l2_get_subdevdata(sd);
	122	unsigned char buffer[3];
	123	int rc;
	124
	125	buffer[0] = addr;
	126	buffer[1] = value >> 8;
	127	buffer[2] = value & 0xff;
	128
	129	v4l2_dbg(2, debug, sd,
	130	"mt9v011: writing 0x%02x 0x%04x\n", buffer[0], value);
27fe4a30	131	rc = i2c_master_send(c, buffer, 3);
fbe2800c	132	if (rc != 3)
7dfba00d MCC	133	v4l2_dbg(0, debug, sd,
	134	"i2c i/o error: rc == %d (should be 3)\n", rc);
	135	}
	136
	137
	138	struct i2c_reg_value {
	139	unsigned char reg;
	140	u16 value;
	141	};
	142
	143	/*
	144	* Values used at the original driver
	145	* Some values are marked as Reserved at the datasheet
	146	*/
	147	static const struct i2c_reg_value mt9v011_init_default[] = {
7dfba00d MCC	148	{ R0D_MT9V011_RESET, 0x0001 },
7dfba00d MCC	149	{ R0D_MT9V011_RESET, 0x0000 },
afe09f82	150
afe09f82	151	{ R0C_MT9V011_SHUTTER_DELAY, 0x0000 },
6934e6ff MCC	152	{ R09_MT9V011_SHUTTER_WIDTH, 0x1fc },
	153
	154	{ R0A_MT9V011_CLK_SPEED, 0x0000 },
afe09f82	155	{ R1E_MT9V011_DIGITAL_ZOOM, 0x0000 },
afe09f82	156
e11206e6	157	{ R07_MT9V011_OUT_CTRL, 0x0002 }, /* chip enable */
7dfba00d MCC	158	};
	159
	160	static void set_balance(struct v4l2_subdev *sd)
	161	{
	162	struct mt9v011 *core = to_mt9v011(sd);
	163	u16 green1_gain, green2_gain, blue_gain, red_gain;
	164
	165	green1_gain = core->global_gain;
	166	green2_gain = core->global_gain;
	167
	168	blue_gain = core->global_gain +
	169	core->global_gain * core->blue_bal / (1 << 9);
	170
	171	red_gain = core->global_gain +
	172	core->global_gain * core->blue_bal / (1 << 9);
	173
	174	mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green1_gain);
	175	mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN, green1_gain);
	176	mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain);
	177	mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain);
	178	}
	179
83053f7f	180	static void calc_fps(struct v4l2_subdev sd, u32 numerator, u32 *denominator)
e11206e6 MCC	181	{
	182	struct mt9v011 *core = to_mt9v011(sd);
	183	unsigned height, width, hblank, vblank, speed;
	184	unsigned row_time, t_time;
	185	u64 frames_per_ms;
	186	unsigned tmp;
	187
	188	height = mt9v011_read(sd, R03_MT9V011_HEIGHT);
	189	width = mt9v011_read(sd, R04_MT9V011_WIDTH);
	190	hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);
	191	vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);
	192	speed = mt9v011_read(sd, R0A_MT9V011_CLK_SPEED);
	193
	194	row_time = (width + 113 + hblank) * (speed + 2);
	195	t_time = row_time * (height + vblank + 1);
	196
	197	frames_per_ms = core->xtal * 1000l;
	198	do_div(frames_per_ms, t_time);
	199	tmp = frames_per_ms;
	200
	201	v4l2_dbg(1, debug, sd, "Programmed to %u.%03u fps (%d pixel clcks)\n",
	202	tmp / 1000, tmp % 1000, t_time);
83053f7f MCC	203
	204	if (numerator && denominator) {
	205	*numerator = 1000;
	206	*denominator = (u32)frames_per_ms;
	207	}
	208	}
	209
	210	static u16 calc_speed(struct v4l2_subdev *sd, u32 numerator, u32 denominator)
	211	{
	212	struct mt9v011 *core = to_mt9v011(sd);
	213	unsigned height, width, hblank, vblank;
	214	unsigned row_time, line_time;
	215	u64 t_time, speed;
	216
	217	/* Avoid bogus calculus */
	218	if (!numerator \|\| !denominator)
	219	return 0;
	220
	221	height = mt9v011_read(sd, R03_MT9V011_HEIGHT);
	222	width = mt9v011_read(sd, R04_MT9V011_WIDTH);
	223	hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);
	224	vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);
	225
	226	row_time = width + 113 + hblank;
	227	line_time = height + vblank + 1;
	228
	229	t_time = core->xtal * ((u64)numerator);
	230	/* round to the closest value */
	231	t_time += denominator / 2;
	232	do_div(t_time, denominator);
	233
	234	speed = t_time;
	235	do_div(speed, row_time * line_time);
	236
	237	/* Avoid having a negative value for speed */
	238	if (speed < 2)
	239	speed = 0;
	240	else
	241	speed -= 2;
	242
	243	/* Avoid speed overflow */
	244	if (speed > 15)
	245	return 15;
	246
	247	return (u16)speed;
e11206e6 MCC	248	}
e11206e6 MCC	249
27fe4a30 MCC	250	static void set_res(struct v4l2_subdev *sd)
	251	{
	252	struct mt9v011 *core = to_mt9v011(sd);
	253	unsigned vstart, hstart;
	254
	255	/*
	256	* The mt9v011 doesn't have scaling. So, in order to select the desired
	257	* resolution, we're cropping at the middle of the sensor.
	258	* hblank and vblank should be adjusted, in order to warrant that
	259	* we'll preserve the line timings for 30 fps, no matter what resolution
	260	* is selected.
6934e6ff MCC	261	* NOTE: datasheet says that width (and height) should be filled with
	262	* width-1. However, this doesn't work, since one pixel per line will
	263	* be missing.
27fe4a30 MCC	264	*/
	265
	266	hstart = 14 + (640 - core->width) / 2;
	267	mt9v011_write(sd, R02_MT9V011_COLSTART, hstart);
	268	mt9v011_write(sd, R04_MT9V011_WIDTH, core->width);
	269	mt9v011_write(sd, R05_MT9V011_HBLANK, 771 - core->width);
	270
c180604a	271	vstart = 8 + (480 - core->height) / 2;
27fe4a30 MCC	272	mt9v011_write(sd, R01_MT9V011_ROWSTART, vstart);
	273	mt9v011_write(sd, R03_MT9V011_HEIGHT, core->height);
	274	mt9v011_write(sd, R06_MT9V011_VBLANK, 508 - core->height);
e11206e6	275
83053f7f	276	calc_fps(sd, NULL, NULL);
27fe4a30 MCC	277	};
27fe4a30 MCC	278
2526ea6e MCC	279	static void set_read_mode(struct v4l2_subdev *sd)
	280	{
	281	struct mt9v011 *core = to_mt9v011(sd);
	282	unsigned mode = 0x1000;
	283
	284	if (core->hflip)
	285	mode \|= 0x4000;
	286
	287	if (core->vflip)
	288	mode \|= 0x8000;
	289
	290	mt9v011_write(sd, R20_MT9V011_READ_MODE, mode);
	291	}
	292
7dfba00d MCC	293	static int mt9v011_reset(struct v4l2_subdev *sd, u32 val)
7dfba00d MCC	294	{
7dfba00d MCC	295	int i;
7dfba00d MCC	296
7dfba00d MCC	297	for (i = 0; i < ARRAY_SIZE(mt9v011_init_default); i++)
	298	mt9v011_write(sd, mt9v011_init_default[i].reg,
	299	mt9v011_init_default[i].value);
	300
	301	set_balance(sd);
27fe4a30	302	set_res(sd);
2526ea6e	303	set_read_mode(sd);
7dfba00d MCC	304
	305	return 0;
	306	};
	307
	308	static int mt9v011_g_ctrl(struct v4l2_subdev sd, struct v4l2_control ctrl)
	309	{
	310	struct mt9v011 *core = to_mt9v011(sd);
	311
	312	v4l2_dbg(1, debug, sd, "g_ctrl called\n");
	313
	314	switch (ctrl->id) {
	315	case V4L2_CID_GAIN:
	316	ctrl->value = core->global_gain;
	317	return 0;
	318	case V4L2_CID_RED_BALANCE:
	319	ctrl->value = core->red_bal;
	320	return 0;
	321	case V4L2_CID_BLUE_BALANCE:
	322	ctrl->value = core->blue_bal;
	323	return 0;
2526ea6e MCC	324	case V4L2_CID_HFLIP:
	325	ctrl->value = core->hflip ? 1 : 0;
	326	return 0;
	327	case V4L2_CID_VFLIP:
	328	ctrl->value = core->vflip ? 1 : 0;
	329	return 0;
7dfba00d MCC	330	}
	331	return -EINVAL;
	332	}
	333
9873740b MCC	334	static int mt9v011_queryctrl(struct v4l2_subdev sd, struct v4l2_queryctrl qc)
	335	{
	336	int i;
	337
	338	v4l2_dbg(1, debug, sd, "queryctrl called\n");
	339
	340	for (i = 0; i < ARRAY_SIZE(mt9v011_qctrl); i++)
	341	if (qc->id && qc->id == mt9v011_qctrl[i].id) {
	342	memcpy(qc, &(mt9v011_qctrl[i]),
	343	sizeof(*qc));
	344	return 0;
	345	}
	346
	347	return -EINVAL;
	348	}
	349
	350
7dfba00d MCC	351	static int mt9v011_s_ctrl(struct v4l2_subdev sd, struct v4l2_control ctrl)
	352	{
	353	struct mt9v011 *core = to_mt9v011(sd);
	354	u8 i, n;
	355	n = ARRAY_SIZE(mt9v011_qctrl);
	356
	357	for (i = 0; i < n; i++) {
	358	if (ctrl->id != mt9v011_qctrl[i].id)
	359	continue;
	360	if (ctrl->value < mt9v011_qctrl[i].minimum \|\|
	361	ctrl->value > mt9v011_qctrl[i].maximum)
	362	return -ERANGE;
	363	v4l2_dbg(1, debug, sd, "s_ctrl: id=%d, value=%d\n",
	364	ctrl->id, ctrl->value);
	365	break;
	366	}
	367
	368	switch (ctrl->id) {
	369	case V4L2_CID_GAIN:
	370	core->global_gain = ctrl->value;
	371	break;
	372	case V4L2_CID_RED_BALANCE:
	373	core->red_bal = ctrl->value;
	374	break;
	375	case V4L2_CID_BLUE_BALANCE:
	376	core->blue_bal = ctrl->value;
	377	break;
2526ea6e MCC	378	case V4L2_CID_HFLIP:
	379	core->hflip = ctrl->value;
	380	set_read_mode(sd);
	381	return 0;
	382	case V4L2_CID_VFLIP:
	383	core->vflip = ctrl->value;
	384	set_read_mode(sd);
	385	return 0;
7dfba00d MCC	386	default:
	387	return -EINVAL;
	388	}
	389
	390	set_balance(sd);
	391
	392	return 0;
	393	}
	394
27fe4a30 MCC	395	static int mt9v011_enum_fmt(struct v4l2_subdev sd, struct v4l2_fmtdesc fmt)
	396	{
	397	if (fmt->index > 0)
	398	return -EINVAL;
	399
	400	fmt->flags = 0;
	401	strcpy(fmt->description, "8 bpp Bayer GRGR..BGBG");
	402	fmt->pixelformat = V4L2_PIX_FMT_SGRBG8;
	403
	404	return 0;
	405	}
	406
	407	static int mt9v011_try_fmt(struct v4l2_subdev sd, struct v4l2_format fmt)
	408	{
	409	struct v4l2_pix_format *pix = &fmt->fmt.pix;
	410
	411	if (pix->pixelformat != V4L2_PIX_FMT_SGRBG8)
	412	return -EINVAL;
	413
	414	v4l_bound_align_image(&pix->width, 48, 639, 1,
	415	&pix->height, 32, 480, 1, 0);
	416
	417	return 0;
	418	}
	419
83053f7f MCC	420	static int mt9v011_g_parm(struct v4l2_subdev sd, struct v4l2_streamparm parms)
	421	{
	422	struct v4l2_captureparm *cp = &parms->parm.capture;
	423
	424	if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
	425	return -EINVAL;
	426
	427	memset(cp, 0, sizeof(struct v4l2_captureparm));
	428	cp->capability = V4L2_CAP_TIMEPERFRAME;
	429	calc_fps(sd,
	430	&cp->timeperframe.numerator,
	431	&cp->timeperframe.denominator);
	432
	433	return 0;
	434	}
	435
	436	static int mt9v011_s_parm(struct v4l2_subdev sd, struct v4l2_streamparm parms)
	437	{
	438	struct v4l2_captureparm *cp = &parms->parm.capture;
	439	struct v4l2_fract *tpf = &cp->timeperframe;
	440	u16 speed;
	441
	442	if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
	443	return -EINVAL;
	444	if (cp->extendedmode != 0)
	445	return -EINVAL;
	446
	447	speed = calc_speed(sd, tpf->numerator, tpf->denominator);
	448
	449	mt9v011_write(sd, R0A_MT9V011_CLK_SPEED, speed);
	450	v4l2_dbg(1, debug, sd, "Setting speed to %d\n", speed);
	451
	452	/* Recalculate and update fps info */
	453	calc_fps(sd, &tpf->numerator, &tpf->denominator);
	454
	455	return 0;
	456	}
	457
27fe4a30 MCC	458	static int mt9v011_s_fmt(struct v4l2_subdev sd, struct v4l2_format fmt)
	459	{
	460	struct v4l2_pix_format *pix = &fmt->fmt.pix;
	461	struct mt9v011 *core = to_mt9v011(sd);
	462	int rc;
	463
	464	rc = mt9v011_try_fmt(sd, fmt);
	465	if (rc < 0)
	466	return -EINVAL;
	467
	468	core->width = pix->width;
	469	core->height = pix->height;
	470
	471	set_res(sd);
	472
	473	return 0;
	474	}
	475
2ea472ff MCC	476	static int mt9v011_s_config(struct v4l2_subdev sd, int dumb, void data)
	477	{
	478	struct mt9v011 *core = to_mt9v011(sd);
	479	unsigned *xtal = data;
	480
	481	v4l2_dbg(1, debug, sd, "s_config called\n");
	482
	483	if (xtal) {
	484	core->xtal = *xtal;
	485	v4l2_dbg(1, debug, sd, "xtal set to %d.%03d MHz\n",
	486	xtal / 1000000, (xtal / 1000) % 1000);
	487	}
	488
	489	return 0;
	490	}
	491
27fe4a30	492
7dfba00d MCC	493	#ifdef CONFIG_VIDEO_ADV_DEBUG
	494	static int mt9v011_g_register(struct v4l2_subdev *sd,
	495	struct v4l2_dbg_register *reg)
	496	{
	497	struct i2c_client *client = v4l2_get_subdevdata(sd);
	498
	499	if (!v4l2_chip_match_i2c_client(client, &reg->match))
	500	return -EINVAL;
	501	if (!capable(CAP_SYS_ADMIN))
	502	return -EPERM;
	503
	504	reg->val = mt9v011_read(sd, reg->reg & 0xff);
	505	reg->size = 2;
	506
	507	return 0;
	508	}
	509
	510	static int mt9v011_s_register(struct v4l2_subdev *sd,
	511	struct v4l2_dbg_register *reg)
	512	{
	513	struct i2c_client *client = v4l2_get_subdevdata(sd);
	514
	515	if (!v4l2_chip_match_i2c_client(client, &reg->match))
	516	return -EINVAL;
	517	if (!capable(CAP_SYS_ADMIN))
	518	return -EPERM;
	519
	520	mt9v011_write(sd, reg->reg & 0xff, reg->val & 0xffff);
	521
	522	return 0;
	523	}
	524	#endif
	525
	526	static int mt9v011_g_chip_ident(struct v4l2_subdev *sd,
	527	struct v4l2_dbg_chip_ident *chip)
	528	{
296544e1	529	u16 version;
7dfba00d MCC	530	struct i2c_client *client = v4l2_get_subdevdata(sd);
7dfba00d MCC	531
296544e1 MCC	532	version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);
296544e1 MCC	533
7dfba00d	534	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_MT9V011,
296544e1	535	version);
7dfba00d MCC	536	}
	537
	538	static const struct v4l2_subdev_core_ops mt9v011_core_ops = {
9873740b	539	.queryctrl = mt9v011_queryctrl,
7dfba00d MCC	540	.g_ctrl = mt9v011_g_ctrl,
	541	.s_ctrl = mt9v011_s_ctrl,
	542	.reset = mt9v011_reset,
2ea472ff	543	.s_config = mt9v011_s_config,
7dfba00d MCC	544	.g_chip_ident = mt9v011_g_chip_ident,
	545	#ifdef CONFIG_VIDEO_ADV_DEBUG
	546	.g_register = mt9v011_g_register,
	547	.s_register = mt9v011_s_register,
	548	#endif
	549	};
	550
27fe4a30 MCC	551	static const struct v4l2_subdev_video_ops mt9v011_video_ops = {
	552	.enum_fmt = mt9v011_enum_fmt,
	553	.try_fmt = mt9v011_try_fmt,
	554	.s_fmt = mt9v011_s_fmt,
83053f7f MCC	555	.g_parm = mt9v011_g_parm,
83053f7f MCC	556	.s_parm = mt9v011_s_parm,
27fe4a30 MCC	557	};
27fe4a30 MCC	558
7dfba00d	559	static const struct v4l2_subdev_ops mt9v011_ops = {
27fe4a30 MCC	560	.core = &mt9v011_core_ops,
27fe4a30 MCC	561	.video = &mt9v011_video_ops,
7dfba00d MCC	562	};
	563
	564
	565	/****************************************************************************
	566	I2C Client & Driver
	567	****************************************************************************/
	568
	569	static int mt9v011_probe(struct i2c_client *c,
	570	const struct i2c_device_id *id)
	571	{
27fe4a30	572	u16 version;
7dfba00d MCC	573	struct mt9v011 *core;
	574	struct v4l2_subdev *sd;
	575
	576	/* Check if the adapter supports the needed features */
	577	if (!i2c_check_functionality(c->adapter,
	578	I2C_FUNC_SMBUS_READ_BYTE \| I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
	579	return -EIO;
	580
	581	core = kzalloc(sizeof(struct mt9v011), GFP_KERNEL);
	582	if (!core)
	583	return -ENOMEM;
	584
7dfba00d MCC	585	sd = &core->sd;
7dfba00d MCC	586	v4l2_i2c_subdev_init(sd, c, &mt9v011_ops);
27fe4a30 MCC	587
	588	/* Check if the sensor is really a MT9V011 */
	589	version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);
296544e1 MCC	590	if ((version != MT9V011_VERSION) &&
	591	(version != MT9V011_REV_B_VERSION)) {
	592	v4l2_info(sd, "*** unknown micron chip detected (0x%04x).\n",
27fe4a30 MCC	593	version);
	594	kfree(core);
	595	return -EINVAL;
	596	}
	597
	598	core->global_gain = 0x0024;
	599	core->width = 640;
	600	core->height = 480;
e11206e6	601	core->xtal = 27000000; /* Hz */
27fe4a30	602
296544e1 MCC	603	v4l_info(c, "chip found @ 0x%02x (%s - chip version 0x%04x)\n",
296544e1 MCC	604	c->addr << 1, c->adapter->name, version);
7dfba00d MCC	605
	606	return 0;
	607	}
	608
	609	static int mt9v011_remove(struct i2c_client *c)
	610	{
	611	struct v4l2_subdev *sd = i2c_get_clientdata(c);
	612
	613	v4l2_dbg(1, debug, sd,
	614	"mt9v011.c: removing mt9v011 adapter on address 0x%x\n",
	615	c->addr << 1);
	616
	617	v4l2_device_unregister_subdev(sd);
	618	kfree(to_mt9v011(sd));
	619	return 0;
	620	}
	621
	622	/* ----------------------------------------------------------------------- */
	623
	624	static const struct i2c_device_id mt9v011_id[] = {
	625	{ "mt9v011", 0 },
	626	{ }
	627	};
	628	MODULE_DEVICE_TABLE(i2c, mt9v011_id);
	629
	630	static struct v4l2_i2c_driver_data v4l2_i2c_data = {
	631	.name = "mt9v011",
	632	.probe = mt9v011_probe,
	633	.remove = mt9v011_remove,
	634	.id_table = mt9v011_id,
	635	};