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linux/drivers/media/video/mt9v022.c
Guennadi Liakhovetski 979ea1ddf8 V4L/DVB (12510): soc-camera: (partially) convert to v4l2-(sub)dev API 
Convert the soc-camera framework to use the v4l2-(sub)dev API. Start using
v4l2-subdev operations. Only a part of the interface between the
soc_camera core, soc_camera host drivers on one side and soc_camera device
drivers on the other side is replaced so far. The rest of the interface
will be replaced in incremental steps, and will require extensions and,
possibly, modifications to the v4l2-subdev code.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-09-19 00:18:35 -03:00

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/*
* Driver for MT9V022 CMOS Image Sensor from Micron
*
* Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/videodev2.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/log2.h>
#include <media/v4l2-subdev.h>
#include <media/v4l2-chip-ident.h>
#include <media/soc_camera.h>
/* mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c
* The platform has to define ctruct i2c_board_info objects and link to them
* from struct soc_camera_link */
static char *sensor_type;
module_param(sensor_type, charp, S_IRUGO);
MODULE_PARM_DESC(sensor_type, "Sensor type: \"colour\" or \"monochrome\"");
/* mt9v022 selected register addresses */
#define MT9V022_CHIP_VERSION 0x00
#define MT9V022_COLUMN_START 0x01
#define MT9V022_ROW_START 0x02
#define MT9V022_WINDOW_HEIGHT 0x03
#define MT9V022_WINDOW_WIDTH 0x04
#define MT9V022_HORIZONTAL_BLANKING 0x05
#define MT9V022_VERTICAL_BLANKING 0x06
#define MT9V022_CHIP_CONTROL 0x07
#define MT9V022_SHUTTER_WIDTH1 0x08
#define MT9V022_SHUTTER_WIDTH2 0x09
#define MT9V022_SHUTTER_WIDTH_CTRL 0x0a
#define MT9V022_TOTAL_SHUTTER_WIDTH 0x0b
#define MT9V022_RESET 0x0c
#define MT9V022_READ_MODE 0x0d
#define MT9V022_MONITOR_MODE 0x0e
#define MT9V022_PIXEL_OPERATION_MODE 0x0f
#define MT9V022_LED_OUT_CONTROL 0x1b
#define MT9V022_ADC_MODE_CONTROL 0x1c
#define MT9V022_ANALOG_GAIN 0x34
#define MT9V022_BLACK_LEVEL_CALIB_CTRL 0x47
#define MT9V022_PIXCLK_FV_LV 0x74
#define MT9V022_DIGITAL_TEST_PATTERN 0x7f
#define MT9V022_AEC_AGC_ENABLE 0xAF
#define MT9V022_MAX_TOTAL_SHUTTER_WIDTH 0xBD
/* Progressive scan, master, defaults */
#define MT9V022_CHIP_CONTROL_DEFAULT 0x188
static const struct soc_camera_data_format mt9v022_colour_formats[] = {
/* Order important: first natively supported,
* second supported with a GPIO extender */
{
.name = "Bayer (sRGB) 10 bit",
.depth = 10,
.fourcc = V4L2_PIX_FMT_SBGGR16,
.colorspace = V4L2_COLORSPACE_SRGB,
}, {
.name = "Bayer (sRGB) 8 bit",
.depth = 8,
.fourcc = V4L2_PIX_FMT_SBGGR8,
.colorspace = V4L2_COLORSPACE_SRGB,
}
};
static const struct soc_camera_data_format mt9v022_monochrome_formats[] = {
/* Order important - see above */
{
.name = "Monochrome 10 bit",
.depth = 10,
.fourcc = V4L2_PIX_FMT_Y16,
}, {
.name = "Monochrome 8 bit",
.depth = 8,
.fourcc = V4L2_PIX_FMT_GREY,
},
};
struct mt9v022 {
struct v4l2_subdev subdev;
int model; /* V4L2_IDENT_MT9V022* codes from v4l2-chip-ident.h */
u16 chip_control;
};
static struct mt9v022 *to_mt9v022(const struct i2c_client *client)
{
return container_of(i2c_get_clientdata(client), struct mt9v022, subdev);
}
static int reg_read(struct i2c_client *client, const u8 reg)
{
s32 data = i2c_smbus_read_word_data(client, reg);
return data < 0 ? data : swab16(data);
}
static int reg_write(struct i2c_client *client, const u8 reg,
const u16 data)
{
return i2c_smbus_write_word_data(client, reg, swab16(data));
}
static int reg_set(struct i2c_client *client, const u8 reg,
const u16 data)
{
int ret;
ret = reg_read(client, reg);
if (ret < 0)
return ret;
return reg_write(client, reg, ret | data);
}
static int reg_clear(struct i2c_client *client, const u8 reg,
const u16 data)
{
int ret;
ret = reg_read(client, reg);
if (ret < 0)
return ret;
return reg_write(client, reg, ret & ~data);
}
static int mt9v022_init(struct soc_camera_device *icd)
{
struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
struct mt9v022 *mt9v022 = to_mt9v022(client);
int ret;
/* Almost the default mode: master, parallel, simultaneous, and an
* undocumented bit 0x200, which is present in table 7, but not in 8,
* plus snapshot mode to disable scan for now */
mt9v022->chip_control |= 0x10;
ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
if (!ret)
ret = reg_write(client, MT9V022_READ_MODE, 0x300);
/* All defaults */
if (!ret)
/* AEC, AGC on */
ret = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x3);
if (!ret)
ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH, 480);
if (!ret)
/* default - auto */
ret = reg_clear(client, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1);
if (!ret)
ret = reg_write(client, MT9V022_DIGITAL_TEST_PATTERN, 0);
return ret;
}
static int mt9v022_s_stream(struct v4l2_subdev *sd, int enable)
{
struct i2c_client *client = sd->priv;
struct mt9v022 *mt9v022 = to_mt9v022(client);
if (enable)
/* Switch to master "normal" mode */
mt9v022->chip_control &= ~0x10;
else
/* Switch to snapshot mode */
mt9v022->chip_control |= 0x10;
if (reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control) < 0)
return -EIO;
return 0;
}
static int mt9v022_set_bus_param(struct soc_camera_device *icd,
unsigned long flags)
{
struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
struct mt9v022 *mt9v022 = to_mt9v022(client);
struct soc_camera_link *icl = to_soc_camera_link(icd);
unsigned int width_flag = flags & SOCAM_DATAWIDTH_MASK;
int ret;
u16 pixclk = 0;
/* Only one width bit may be set */
if (!is_power_of_2(width_flag))
return -EINVAL;
if (icl->set_bus_param) {
ret = icl->set_bus_param(icl, width_flag);
if (ret)
return ret;
} else {
/*
* Without board specific bus width settings we only support the
* sensors native bus width
*/
if (width_flag != SOCAM_DATAWIDTH_10)
return -EINVAL;
}
flags = soc_camera_apply_sensor_flags(icl, flags);
if (flags & SOCAM_PCLK_SAMPLE_RISING)
pixclk |= 0x10;
if (!(flags & SOCAM_HSYNC_ACTIVE_HIGH))
pixclk |= 0x1;
if (!(flags & SOCAM_VSYNC_ACTIVE_HIGH))
pixclk |= 0x2;
ret = reg_write(client, MT9V022_PIXCLK_FV_LV, pixclk);
if (ret < 0)
return ret;
if (!(flags & SOCAM_MASTER))
mt9v022->chip_control &= ~0x8;
ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
if (ret < 0)
return ret;
dev_dbg(&icd->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
pixclk, mt9v022->chip_control);
return 0;
}
static unsigned long mt9v022_query_bus_param(struct soc_camera_device *icd)
{
struct soc_camera_link *icl = to_soc_camera_link(icd);
unsigned int width_flag;
if (icl->query_bus_param)
width_flag = icl->query_bus_param(icl) &
SOCAM_DATAWIDTH_MASK;
else
width_flag = SOCAM_DATAWIDTH_10;
return SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING |
SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW |
SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW |
SOCAM_DATA_ACTIVE_HIGH | SOCAM_MASTER | SOCAM_SLAVE |
width_flag;
}
static int mt9v022_set_crop(struct soc_camera_device *icd,
struct v4l2_rect *rect)
{
struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
int ret;
/* Like in example app. Contradicts the datasheet though */
ret = reg_read(client, MT9V022_AEC_AGC_ENABLE);
if (ret >= 0) {
if (ret & 1) /* Autoexposure */
ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
rect->height + icd->y_skip_top + 43);
else
ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
rect->height + icd->y_skip_top + 43);
}
/* Setup frame format: defaults apart from width and height */
if (!ret)
ret = reg_write(client, MT9V022_COLUMN_START, rect->left);
if (!ret)
ret = reg_write(client, MT9V022_ROW_START, rect->top);
if (!ret)
/* Default 94, Phytec driver says:
* "width + horizontal blank >= 660" */
ret = reg_write(client, MT9V022_HORIZONTAL_BLANKING,
rect->width > 660 - 43 ? 43 :
660 - rect->width);
if (!ret)
ret = reg_write(client, MT9V022_VERTICAL_BLANKING, 45);
if (!ret)
ret = reg_write(client, MT9V022_WINDOW_WIDTH, rect->width);
if (!ret)
ret = reg_write(client, MT9V022_WINDOW_HEIGHT,
rect->height + icd->y_skip_top);
if (ret < 0)
return ret;
dev_dbg(&icd->dev, "Frame %ux%u pixel\n", rect->width, rect->height);
return 0;
}
static int mt9v022_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
{
struct i2c_client *client = sd->priv;
struct mt9v022 *mt9v022 = to_mt9v022(client);
struct soc_camera_device *icd = client->dev.platform_data;
struct v4l2_pix_format *pix = &f->fmt.pix;
struct v4l2_rect rect = {
.left = icd->x_current,
.top = icd->y_current,
.width = pix->width,
.height = pix->height,
};
/* The caller provides a supported format, as verified per call to
* icd->try_fmt(), datawidth is from our supported format list */
switch (pix->pixelformat) {
case V4L2_PIX_FMT_GREY:
case V4L2_PIX_FMT_Y16:
if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATM)
return -EINVAL;
break;
case V4L2_PIX_FMT_SBGGR8:
case V4L2_PIX_FMT_SBGGR16:
if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATC)
return -EINVAL;
break;
case 0:
/* No format change, only geometry */
break;
default:
return -EINVAL;
}
/* No support for scaling on this camera, just crop. */
return mt9v022_set_crop(icd, &rect);
}
static int mt9v022_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
{
struct i2c_client *client = sd->priv;
struct soc_camera_device *icd = client->dev.platform_data;
struct v4l2_pix_format *pix = &f->fmt.pix;
v4l_bound_align_image(&pix->width, 48, 752, 2 /* ? */,
&pix->height, 32 + icd->y_skip_top,
480 + icd->y_skip_top, 0, 0);
return 0;
}
static int mt9v022_g_chip_ident(struct v4l2_subdev *sd,
struct v4l2_dbg_chip_ident *id)
{
struct i2c_client *client = sd->priv;
struct mt9v022 *mt9v022 = to_mt9v022(client);
if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
return -EINVAL;
if (id->match.addr != client->addr)
return -ENODEV;
id->ident = mt9v022->model;
id->revision = 0;
return 0;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int mt9v022_g_register(struct v4l2_subdev *sd,
struct v4l2_dbg_register *reg)
{
struct i2c_client *client = sd->priv;
if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
return -EINVAL;
if (reg->match.addr != client->addr)
return -ENODEV;
reg->size = 2;
reg->val = reg_read(client, reg->reg);
if (reg->val > 0xffff)
return -EIO;
return 0;
}
static int mt9v022_s_register(struct v4l2_subdev *sd,
struct v4l2_dbg_register *reg)
{
struct i2c_client *client = sd->priv;
if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
return -EINVAL;
if (reg->match.addr != client->addr)
return -ENODEV;
if (reg_write(client, reg->reg, reg->val) < 0)
return -EIO;
return 0;
}
#endif
static const struct v4l2_queryctrl mt9v022_controls[] = {
{
.id = V4L2_CID_VFLIP,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Flip Vertically",
.minimum = 0,
.maximum = 1,
.step = 1,
.default_value = 0,
}, {
.id = V4L2_CID_HFLIP,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Flip Horizontally",
.minimum = 0,
.maximum = 1,
.step = 1,
.default_value = 0,
}, {
.id = V4L2_CID_GAIN,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Analog Gain",
.minimum = 64,
.maximum = 127,
.step = 1,
.default_value = 64,
.flags = V4L2_CTRL_FLAG_SLIDER,
}, {
.id = V4L2_CID_EXPOSURE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Exposure",
.minimum = 1,
.maximum = 255,
.step = 1,
.default_value = 255,
.flags = V4L2_CTRL_FLAG_SLIDER,
}, {
.id = V4L2_CID_AUTOGAIN,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Automatic Gain",
.minimum = 0,
.maximum = 1,
.step = 1,
.default_value = 1,
}, {
.id = V4L2_CID_EXPOSURE_AUTO,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Automatic Exposure",
.minimum = 0,
.maximum = 1,
.step = 1,
.default_value = 1,
}
};
static struct soc_camera_ops mt9v022_ops = {
.init = mt9v022_init,
.set_crop = mt9v022_set_crop,
.set_bus_param = mt9v022_set_bus_param,
.query_bus_param = mt9v022_query_bus_param,
.controls = mt9v022_controls,
.num_controls = ARRAY_SIZE(mt9v022_controls),
};
static int mt9v022_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
struct i2c_client *client = sd->priv;
int data;
switch (ctrl->id) {
case V4L2_CID_VFLIP:
data = reg_read(client, MT9V022_READ_MODE);
if (data < 0)
return -EIO;
ctrl->value = !!(data & 0x10);
break;
case V4L2_CID_HFLIP:
data = reg_read(client, MT9V022_READ_MODE);
if (data < 0)
return -EIO;
ctrl->value = !!(data & 0x20);
break;
case V4L2_CID_EXPOSURE_AUTO:
data = reg_read(client, MT9V022_AEC_AGC_ENABLE);
if (data < 0)
return -EIO;
ctrl->value = !!(data & 0x1);
break;
case V4L2_CID_AUTOGAIN:
data = reg_read(client, MT9V022_AEC_AGC_ENABLE);
if (data < 0)
return -EIO;
ctrl->value = !!(data & 0x2);
break;
}
return 0;
}
static int mt9v022_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
int data;
struct i2c_client *client = sd->priv;
struct soc_camera_device *icd = client->dev.platform_data;
const struct v4l2_queryctrl *qctrl;
qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id);
if (!qctrl)
return -EINVAL;
switch (ctrl->id) {
case V4L2_CID_VFLIP:
if (ctrl->value)
data = reg_set(client, MT9V022_READ_MODE, 0x10);
else
data = reg_clear(client, MT9V022_READ_MODE, 0x10);
if (data < 0)
return -EIO;
break;
case V4L2_CID_HFLIP:
if (ctrl->value)
data = reg_set(client, MT9V022_READ_MODE, 0x20);
else
data = reg_clear(client, MT9V022_READ_MODE, 0x20);
if (data < 0)
return -EIO;
break;
case V4L2_CID_GAIN:
/* mt9v022 has minimum == default */
if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
return -EINVAL;
else {
unsigned long range = qctrl->maximum - qctrl->minimum;
/* Datasheet says 16 to 64. autogain only works properly
* after setting gain to maximum 14. Larger values
* produce "white fly" noise effect. On the whole,
* manually setting analog gain does no good. */
unsigned long gain = ((ctrl->value - qctrl->minimum) *
10 + range / 2) / range + 4;
if (gain >= 32)
gain &= ~1;
/* The user wants to set gain manually, hope, she
* knows, what she's doing... Switch AGC off. */
if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
return -EIO;
dev_info(&icd->dev, "Setting gain from %d to %lu\n",
reg_read(client, MT9V022_ANALOG_GAIN), gain);
if (reg_write(client, MT9V022_ANALOG_GAIN, gain) < 0)
return -EIO;
icd->gain = ctrl->value;
}
break;
case V4L2_CID_EXPOSURE:
/* mt9v022 has maximum == default */
if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
return -EINVAL;
else {
unsigned long range = qctrl->maximum - qctrl->minimum;
unsigned long shutter = ((ctrl->value - qctrl->minimum) *
479 + range / 2) / range + 1;
/* The user wants to set shutter width manually, hope,
* she knows, what she's doing... Switch AEC off. */
if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1) < 0)
return -EIO;
dev_dbg(&icd->dev, "Shutter width from %d to %lu\n",
reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH),
shutter);
if (reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
shutter) < 0)
return -EIO;
icd->exposure = ctrl->value;
}
break;
case V4L2_CID_AUTOGAIN:
if (ctrl->value)
data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x2);
else
data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2);
if (data < 0)
return -EIO;
break;
case V4L2_CID_EXPOSURE_AUTO:
if (ctrl->value)
data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x1);
else
data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1);
if (data < 0)
return -EIO;
break;
}
return 0;
}
/* Interface active, can use i2c. If it fails, it can indeed mean, that
* this wasn't our capture interface, so, we wait for the right one */
static int mt9v022_video_probe(struct soc_camera_device *icd,
struct i2c_client *client)
{
struct mt9v022 *mt9v022 = to_mt9v022(client);
struct soc_camera_link *icl = to_soc_camera_link(icd);
s32 data;
int ret;
unsigned long flags;
if (!icd->dev.parent ||
to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
return -ENODEV;
/* Read out the chip version register */
data = reg_read(client, MT9V022_CHIP_VERSION);
/* must be 0x1311 or 0x1313 */
if (data != 0x1311 && data != 0x1313) {
ret = -ENODEV;
dev_info(&icd->dev, "No MT9V022 detected, ID register 0x%x\n",
data);
goto ei2c;
}
/* Soft reset */
ret = reg_write(client, MT9V022_RESET, 1);
if (ret < 0)
goto ei2c;
/* 15 clock cycles */
udelay(200);
if (reg_read(client, MT9V022_RESET)) {
dev_err(&icd->dev, "Resetting MT9V022 failed!\n");
if (ret > 0)
ret = -EIO;
goto ei2c;
}
/* Set monochrome or colour sensor type */
if (sensor_type && (!strcmp("colour", sensor_type) ||
!strcmp("color", sensor_type))) {
ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
mt9v022->model = V4L2_IDENT_MT9V022IX7ATC;
icd->formats = mt9v022_colour_formats;
} else {
ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 0x11);
mt9v022->model = V4L2_IDENT_MT9V022IX7ATM;
icd->formats = mt9v022_monochrome_formats;
}
if (ret < 0)
goto ei2c;
icd->num_formats = 0;
/*
* This is a 10bit sensor, so by default we only allow 10bit.
* The platform may support different bus widths due to
* different routing of the data lines.
*/
if (icl->query_bus_param)
flags = icl->query_bus_param(icl);
else
flags = SOCAM_DATAWIDTH_10;
if (flags & SOCAM_DATAWIDTH_10)
icd->num_formats++;
else
icd->formats++;
if (flags & SOCAM_DATAWIDTH_8)
icd->num_formats++;
dev_info(&icd->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
data, mt9v022->model == V4L2_IDENT_MT9V022IX7ATM ?
"monochrome" : "colour");
ei2c:
return ret;
}
static void mt9v022_video_remove(struct soc_camera_device *icd)
{
struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
struct soc_camera_link *icl = to_soc_camera_link(icd);
dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", client->addr,
icd->dev.parent, icd->vdev);
if (icl->free_bus)
icl->free_bus(icl);
}
static struct v4l2_subdev_core_ops mt9v022_subdev_core_ops = {
.g_ctrl = mt9v022_g_ctrl,
.s_ctrl = mt9v022_s_ctrl,
.g_chip_ident = mt9v022_g_chip_ident,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = mt9v022_g_register,
.s_register = mt9v022_s_register,
#endif
};
static struct v4l2_subdev_video_ops mt9v022_subdev_video_ops = {
.s_stream = mt9v022_s_stream,
.s_fmt = mt9v022_s_fmt,
.try_fmt = mt9v022_try_fmt,
};
static struct v4l2_subdev_ops mt9v022_subdev_ops = {
.core = &mt9v022_subdev_core_ops,
.video = &mt9v022_subdev_video_ops,
};
static int mt9v022_probe(struct i2c_client *client,
const struct i2c_device_id *did)
{
struct mt9v022 *mt9v022;
struct soc_camera_device *icd = client->dev.platform_data;
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
struct soc_camera_link *icl;
int ret;
if (!icd) {
dev_err(&client->dev, "MT9V022: missing soc-camera data!\n");
return -EINVAL;
}
icl = to_soc_camera_link(icd);
if (!icl) {
dev_err(&client->dev, "MT9V022 driver needs platform data\n");
return -EINVAL;
}
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
dev_warn(&adapter->dev,
"I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
return -EIO;
}
mt9v022 = kzalloc(sizeof(struct mt9v022), GFP_KERNEL);
if (!mt9v022)
return -ENOMEM;
v4l2_i2c_subdev_init(&mt9v022->subdev, client, &mt9v022_subdev_ops);
mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
icd->ops = &mt9v022_ops;
icd->x_min = 1;
icd->y_min = 4;
icd->x_current = 1;
icd->y_current = 4;
icd->width_min = 48;
icd->width_max = 752;
icd->height_min = 32;
icd->height_max = 480;
icd->y_skip_top = 1;
ret = mt9v022_video_probe(icd, client);
if (ret) {
icd->ops = NULL;
i2c_set_clientdata(client, NULL);
kfree(mt9v022);
}
return ret;
}
static int mt9v022_remove(struct i2c_client *client)
{
struct mt9v022 *mt9v022 = to_mt9v022(client);
struct soc_camera_device *icd = client->dev.platform_data;
icd->ops = NULL;
mt9v022_video_remove(icd);
i2c_set_clientdata(client, NULL);
client->driver = NULL;
kfree(mt9v022);
return 0;
}
static const struct i2c_device_id mt9v022_id[] = {
{ "mt9v022", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, mt9v022_id);
static struct i2c_driver mt9v022_i2c_driver = {
.driver = {
.name = "mt9v022",
},
.probe = mt9v022_probe,
.remove = mt9v022_remove,
.id_table = mt9v022_id,
};
static int __init mt9v022_mod_init(void)
{
return i2c_add_driver(&mt9v022_i2c_driver);
}
static void __exit mt9v022_mod_exit(void)
{
i2c_del_driver(&mt9v022_i2c_driver);
}
module_init(mt9v022_mod_init);
module_exit(mt9v022_mod_exit);
MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
MODULE_LICENSE("GPL");
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