/*
* 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 <linux/gpio.h>
#include <media/v4l2-common.h>
#include <media/v4l2-chip-ident.h>
#include <media/soc_camera.h>
/* mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c
* The platform has to define i2c_board_info
* and call i2c_register_board_info() */
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 i2c_client *client;
struct soc_camera_device icd;
int model; /* V4L2_IDENT_MT9V022* codes from v4l2-chip-ident.h */
int switch_gpio;
u16 chip_control;
unsigned char datawidth;
};
static int reg_read(struct soc_camera_device *icd, const u8 reg)
{
struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
struct i2c_client *client = mt9v022->client;
s32 data = i2c_smbus_read_word_data(client, reg);
return data < 0 ? data : swab16(data);
}
static int reg_write(struct soc_camera_device *icd, const u8 reg,
const u16 data)
{
struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
return i2c_smbus_write_word_data(mt9v022->client, reg, swab16(data));
}
static int reg_set(struct soc_camera_device *icd, const u8 reg,
const u16 data)
{
int ret;
ret = reg_read(icd, reg);
if (ret < 0)
return ret;
return reg_write(icd, reg, ret | data);
}
static int reg_clear(struct soc_camera_device *icd, const u8 reg,
const u16 data)
{
int ret;
ret = reg_read(icd, reg);
if (ret < 0)
return ret;
return reg_write(icd, reg, ret & ~data);
}
static int mt9v022_init(struct soc_camera_device *icd)
{
struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
struct soc_camera_link *icl = mt9v022->client->dev.platform_data;
int ret;
if (icl->power) {
ret = icl->power(&mt9v022->client->dev, 1);
if (ret < 0) {
dev_err(icd->vdev->parent,
"Platform failed to power-on the camera.\n");
return ret;
}
}
/*
* The camera could have been already on, we hard-reset it additionally,
* if available. Soft reset is done in video_probe().
*/
if (icl->reset)
icl->reset(&mt9v022->client->dev);
/* 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(icd, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
if (!ret)
ret = reg_write(icd, MT9V022_READ_MODE, 0x300);
/* All defaults */
if (!ret)
/* AEC, AGC on */
ret = reg_set(icd, MT9V022_AEC_AGC_ENABLE, 0x3);
if (!ret)
ret = reg_write(icd, MT9V022_MAX_TOTAL_SHUTTER_WIDTH, 480);
if (!ret)
/* default - auto */
ret = reg_clear(icd, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1);
if (!ret)
ret = reg_write(icd, MT9V022_DIGITAL_TEST_PATTERN, 0);
return ret;
}
static int mt9v022_release(struct soc_camera_device *icd)
{
struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
struct soc_camera_link *icl = mt9v022->client->dev.platform_data;
if (icl->power)
icl->power(&mt9v022->client->dev, 0);
return 0;
}
static int mt9v022_start_capture(struct soc_camera_device *icd)
{
struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
/* Switch to master "normal" mode */
mt9v022->chip_control &= ~0x10;
if (reg_write(icd, MT9V022_CHIP_CONTROL,
mt9v022->chip_control) < 0)
return -EIO;
return 0;
}
static int mt9v022_stop_capture(struct soc_camera_device *icd)
{
struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
/* Switch to snapshot mode */
mt9v022->chip_control |= 0x10;
if (reg_write(icd, MT9V022_CHIP_CONTROL,
mt9v022->chip_control) < 0)
return -EIO;
return 0;
}
static int bus_switch_request(struct mt9v022 *mt9v022, struct soc_camera_link *icl)
{
#ifdef CONFIG_MT9V022_PCA9536_SWITCH
int ret;
unsigned int gpio = icl->gpio;
if (gpio_is_valid(gpio)) {
/* We have a data bus switch. */
ret = gpio_request(gpio, "mt9v022");
if (ret < 0) {
dev_err(&mt9v022->client->dev, "Cannot get GPIO %u\n", gpio);
return ret;
}
ret = gpio_direction_output(gpio, 0);
if (ret < 0) {
dev_err(&mt9v022->client->dev,
"Cannot set GPIO %u to output\n", gpio);
gpio_free(gpio);
return ret;
}
}
mt9v022->switch_gpio = gpio;
#else
mt9v022->switch_gpio = -EINVAL;
#endif
return 0;
}
static void bus_switch_release(struct mt9v022 *mt9v022)
{
#ifdef CONFIG_MT9V022_PCA9536_SWITCH
if (gpio_is_valid(mt9v022->switch_gpio))
gpio_free(mt9v022->switch_gpio);
#endif
}
static int bus_switch_act(struct mt9v022 *mt9v022, int go8bit)
{
#ifdef CONFIG_MT9V022_PCA9536_SWITCH
if (!gpio_is_valid(mt9v022->switch_gpio))
return -ENODEV;
gpio_set_value_cansleep(mt9v022->switch_gpio, go8bit);
return 0;
#else
return -ENODEV;
#endif
}
static int bus_switch_possible(struct mt9v022 *mt9v022)
{
#ifdef CONFIG_MT9V022_PCA9536_SWITCH
return gpio_is_valid(mt9v022->switch_gpio);
#else
return 0;
#endif
}
static int mt9v022_set_bus_param(struct soc_camera_device *icd,
unsigned long flags)
{
struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
struct soc_camera_link *icl = mt9v022->client->dev.platform_data;
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 ((mt9v022->datawidth != 10 && (width_flag == SOCAM_DATAWIDTH_10)) ||
(mt9v022->datawidth != 9 && (width_flag == SOCAM_DATAWIDTH_9)) ||
(mt9v022->datawidth != 8 && (width_flag == SOCAM_DATAWIDTH_8))) {
/* Well, we actually only can do 10 or 8 bits... */
if (width_flag == SOCAM_DATAWIDTH_9)
return -EINVAL;
ret = bus_switch_act(mt9v022,
width_flag == SOCAM_DATAWIDTH_8);
if (ret < 0)
return ret;
mt9v022->datawidth = width_flag == SOCAM_DATAWIDTH_8 ? 8 : 10;
}
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(icd, MT9V022_PIXCLK_FV_LV, pixclk);
if (ret < 0)
return ret;
if (!(flags & SOCAM_MASTER))
mt9v022->chip_control &= ~0x8;
ret = reg_write(icd, 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 mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
unsigned int width_flag = SOCAM_DATAWIDTH_10;
if (bus_switch_possible(mt9v022))
width_flag |= SOCAM_DATAWIDTH_8;
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_fmt(struct soc_camera_device *icd,
__u32 pixfmt, struct v4l2_rect *rect)
{
struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
int ret;
/* The caller provides a supported format, as verified per call to
* icd->try_fmt(), datawidth is from our supported format list */
switch (pixfmt) {
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;
}
/* Like in example app. Contradicts the datasheet though */
ret = reg_read(icd, MT9V022_AEC_AGC_ENABLE);
if (ret >= 0) {
if (ret & 1) /* Autoexposure */
ret = reg_write(icd, MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
rect->height + icd->y_skip_top + 43);
else
ret = reg_write(icd, 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(icd, MT9V022_COLUMN_START, rect->left);
if (!ret)
ret = reg_write(icd, MT9V022_ROW_START, rect->top);
if (!ret)
/* Default 94, Phytec driver says:
* "width + horizontal blank >= 660" */
ret = reg_write(icd, MT9V022_HORIZONTAL_BLANKING,
rect->width > 660 - 43 ? 43 :
660 - rect->width);
if (!ret)
ret = reg_write(icd, MT9V022_VERTICAL_BLANKING, 45);
if (!ret)
ret = reg_write(icd, MT9V022_WINDOW_WIDTH, rect->width);
if (!ret)
ret = reg_write(icd, 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_try_fmt(struct soc_camera_device *icd,
struct v4l2_format *f)
{
struct v4l2_pix_format *pix = &f->fmt.pix;
if (pix->height < 32 + icd->y_skip_top)
pix->height = 32 + icd->y_skip_top;
if (pix->height > 480 + icd->y_skip_top)
pix->height = 480 + icd->y_skip_top;
if (pix->width < 48)
pix->width = 48;
if (pix->width > 752)
pix->width = 752;
pix->width &= ~0x03; /* ? */
return 0;
}
static int mt9v022_get_chip_id(struct soc_camera_device *icd,
struct v4l2_dbg_chip_ident *id)
{
struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
return -EINVAL;
if (id->match.addr != mt9v022->client->addr)
return -ENODEV;
id->ident = mt9v022->model;
id->revision = 0;
return 0;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int mt9v022_get_register(struct soc_camera_device *icd,
struct v4l2_dbg_register *reg)
{
struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
return -EINVAL;
if (reg->match.addr != mt9v022->client->addr)
return -ENODEV;
reg->size = 2;
reg->val = reg_read(icd, reg->reg);
if (reg->val > 0xffff)
return -EIO;
return 0;
}
static int mt9v022_set_register(struct soc_camera_device *icd,
struct v4l2_dbg_register *reg)
{
struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
return -EINVAL;
if (reg->match.addr != mt9v022->client->addr)
return -ENODEV;
if (reg_write(icd, 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 int mt9v022_video_probe(struct soc_camera_device *);
static void mt9v022_video_remove(struct soc_camera_device *);
static int mt9v022_get_control(struct soc_camera_device *, struct v4l2_control *);
static int mt9v022_set_control(struct soc_camera_device *, struct v4l2_control *);
static struct soc_camera_ops mt9v022_ops = {
.owner = THIS_MODULE,
.probe = mt9v022_video_probe,
.remove = mt9v022_video_remove,
.init = mt9v022_init,
.release = mt9v022_release,
.start_capture = mt9v022_start_capture,
.stop_capture = mt9v022_stop_capture,
.set_fmt = mt9v022_set_fmt,
.try_fmt = mt9v022_try_fmt,
.set_bus_param = mt9v022_set_bus_param,
.query_bus_param = mt9v022_query_bus_param,
.controls = mt9v022_controls,
.num_controls = ARRAY_SIZE(mt9v022_controls),
.get_control = mt9v022_get_control,
.set_control = mt9v022_set_control,
.get_chip_id = mt9v022_get_chip_id,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.get_register = mt9v022_get_register,
.set_register = mt9v022_set_register,
#endif
};
static int mt9v022_get_control(struct soc_camera_device *icd,
struct v4l2_control *ctrl)
{
int data;
switch (ctrl->id) {
case V4L2_CID_VFLIP:
data = reg_read(icd, MT9V022_READ_MODE);
if (data < 0)
return -EIO;
ctrl->value = !!(data & 0x10);
break;
case V4L2_CID_HFLIP:
data = reg_read(icd, MT9V022_READ_MODE);
if (data < 0)
return -EIO;
ctrl->value = !!(data & 0x20);
break;
case V4L2_CID_EXPOSURE_AUTO:
data = reg_read(icd, MT9V022_AEC_AGC_ENABLE);
if (data < 0)
return -EIO;
ctrl->value = !!(data & 0x1);
break;
case V4L2_CID_AUTOGAIN:
data = reg_read(icd, MT9V022_AEC_AGC_ENABLE);
if (data < 0)
return -EIO;
ctrl->value = !!(data & 0x2);
break;
}
return 0;
}
static int mt9v022_set_control(struct soc_camera_device *icd,
struct v4l2_control *ctrl)
{
int 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(icd, MT9V022_READ_MODE, 0x10);
else
data = reg_clear(icd, MT9V022_READ_MODE, 0x10);
if (data < 0)
return -EIO;
break;
case V4L2_CID_HFLIP:
if (ctrl->value)
data = reg_set(icd, MT9V022_READ_MODE, 0x20);
else
data = reg_clear(icd, 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(icd, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
return -EIO;
dev_info(&icd->dev, "Setting gain from %d to %lu\n",
reg_read(icd, MT9V022_ANALOG_GAIN), gain);
if (reg_write(icd, 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(icd, MT9V022_AEC_AGC_ENABLE, 0x1) < 0)
return -EIO;
dev_dbg(&icd->dev, "Shutter width from %d to %lu\n",
reg_read(icd, MT9V022_TOTAL_SHUTTER_WIDTH),
shutter);
if (reg_write(icd, MT9V022_TOTAL_SHUTTER_WIDTH,
shutter) < 0)
return -EIO;
icd->exposure = ctrl->value;
}
break;
case V4L2_CID_AUTOGAIN:
if (ctrl->value)
data = reg_set(icd, MT9V022_AEC_AGC_ENABLE, 0x2);
else
data = reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x2);
if (data < 0)
return -EIO;
break;
case V4L2_CID_EXPOSURE_AUTO:
if (ctrl->value)
data = reg_set(icd, MT9V022_AEC_AGC_ENABLE, 0x1);
else
data = reg_clear(icd, 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 mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
struct soc_camera_link *icl = mt9v022->client->dev.platform_data;
s32 data;
int ret;
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(icd, 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(icd, MT9V022_RESET, 1);
if (ret < 0)
goto ei2c;
/* 15 clock cycles */
udelay(200);
if (reg_read(icd, MT9V022_RESET)) {
dev_err(&icd->dev, "Resetting MT9V022 failed!\n");
goto ei2c;
}
/* Set monochrome or colour sensor type */
if (sensor_type && (!strcmp("colour", sensor_type) ||
!strcmp("color", sensor_type))) {
ret = reg_write(icd, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
mt9v022->model = V4L2_IDENT_MT9V022IX7ATC;
icd->formats = mt9v022_colour_formats;
if (gpio_is_valid(icl->gpio))
icd->num_formats = ARRAY_SIZE(mt9v022_colour_formats);
else
icd->num_formats = 1;
} else {
ret = reg_write(icd, MT9V022_PIXEL_OPERATION_MODE, 0x11);
mt9v022->model = V4L2_IDENT_MT9V022IX7ATM;
icd->formats = mt9v022_monochrome_formats;
if (gpio_is_valid(icl->gpio))
icd->num_formats = ARRAY_SIZE(mt9v022_monochrome_formats);
else
icd->num_formats = 1;
}
if (!ret)
ret = soc_camera_video_start(icd);
if (ret < 0)
goto eisis;
dev_info(&icd->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
data, mt9v022->model == V4L2_IDENT_MT9V022IX7ATM ?
"monochrome" : "colour");
return 0;
eisis:
ei2c:
return ret;
}
static void mt9v022_video_remove(struct soc_camera_device *icd)
{
struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", mt9v022->client->addr,
icd->dev.parent, icd->vdev);
soc_camera_video_stop(icd);
}
static int mt9v022_probe(struct i2c_client *client,
const struct i2c_device_id *did)
{
struct mt9v022 *mt9v022;
struct soc_camera_device *icd;
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
struct soc_camera_link *icl = client->dev.platform_data;
int ret;
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;
mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
mt9v022->client = client;
i2c_set_clientdata(client, mt9v022);
icd = &mt9v022->icd;
icd->ops = &mt9v022_ops;
icd->control = &client->dev;
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;
icd->iface = icl->bus_id;
/* Default datawidth - this is the only width this camera (normally)
* supports. It is only with extra logic that it can support
* other widths. Therefore it seems to be a sensible default. */
mt9v022->datawidth = 10;
ret = bus_switch_request(mt9v022, icl);
if (ret)
goto eswinit;
ret = soc_camera_device_register(icd);
if (ret)
goto eisdr;
return 0;
eisdr:
bus_switch_release(mt9v022);
eswinit:
kfree(mt9v022);
return ret;
}
static int mt9v022_remove(struct i2c_client *client)
{
struct mt9v022 *mt9v022 = i2c_get_clientdata(client);
soc_camera_device_unregister(&mt9v022->icd);
bus_switch_release(mt9v022);
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");
