1014 lines
27 KiB
C
1014 lines
27 KiB
C
/*
|
|
* 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/module.h>
|
|
|
|
#include <media/i2c/mt9v022.h>
|
|
#include <media/soc_camera.h>
|
|
#include <media/drv-intf/soc_mediabus.h>
|
|
#include <media/v4l2-subdev.h>
|
|
#include <media/v4l2-clk.h>
|
|
#include <media/v4l2-ctrls.h>
|
|
|
|
/*
|
|
* mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c
|
|
* The platform has to define struct i2c_board_info objects and link to them
|
|
* from struct soc_camera_host_desc
|
|
*/
|
|
|
|
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_REG32 0x20
|
|
#define MT9V022_ANALOG_GAIN 0x35
|
|
#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
|
|
|
|
/* mt9v024 partial list register addresses changes with respect to mt9v022 */
|
|
#define MT9V024_PIXCLK_FV_LV 0x72
|
|
#define MT9V024_MAX_TOTAL_SHUTTER_WIDTH 0xAD
|
|
|
|
/* Progressive scan, master, defaults */
|
|
#define MT9V022_CHIP_CONTROL_DEFAULT 0x188
|
|
|
|
#define MT9V022_MAX_WIDTH 752
|
|
#define MT9V022_MAX_HEIGHT 480
|
|
#define MT9V022_MIN_WIDTH 48
|
|
#define MT9V022_MIN_HEIGHT 32
|
|
#define MT9V022_COLUMN_SKIP 1
|
|
#define MT9V022_ROW_SKIP 4
|
|
|
|
#define MT9V022_HORIZONTAL_BLANKING_MIN 43
|
|
#define MT9V022_HORIZONTAL_BLANKING_MAX 1023
|
|
#define MT9V022_HORIZONTAL_BLANKING_DEF 94
|
|
#define MT9V022_VERTICAL_BLANKING_MIN 2
|
|
#define MT9V022_VERTICAL_BLANKING_MAX 3000
|
|
#define MT9V022_VERTICAL_BLANKING_DEF 45
|
|
|
|
#define is_mt9v022_rev3(id) (id == 0x1313)
|
|
#define is_mt9v024(id) (id == 0x1324)
|
|
|
|
/* MT9V022 has only one fixed colorspace per pixelcode */
|
|
struct mt9v022_datafmt {
|
|
u32 code;
|
|
enum v4l2_colorspace colorspace;
|
|
};
|
|
|
|
/* Find a data format by a pixel code in an array */
|
|
static const struct mt9v022_datafmt *mt9v022_find_datafmt(
|
|
u32 code, const struct mt9v022_datafmt *fmt,
|
|
int n)
|
|
{
|
|
int i;
|
|
for (i = 0; i < n; i++)
|
|
if (fmt[i].code == code)
|
|
return fmt + i;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static const struct mt9v022_datafmt mt9v022_colour_fmts[] = {
|
|
/*
|
|
* Order important: first natively supported,
|
|
* second supported with a GPIO extender
|
|
*/
|
|
{MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
|
|
{MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
|
|
};
|
|
|
|
static const struct mt9v022_datafmt mt9v022_monochrome_fmts[] = {
|
|
/* Order important - see above */
|
|
{MEDIA_BUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG},
|
|
{MEDIA_BUS_FMT_Y8_1X8, V4L2_COLORSPACE_JPEG},
|
|
};
|
|
|
|
/* only registers with different addresses on different mt9v02x sensors */
|
|
struct mt9v02x_register {
|
|
u8 max_total_shutter_width;
|
|
u8 pixclk_fv_lv;
|
|
};
|
|
|
|
static const struct mt9v02x_register mt9v022_register = {
|
|
.max_total_shutter_width = MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
|
|
.pixclk_fv_lv = MT9V022_PIXCLK_FV_LV,
|
|
};
|
|
|
|
static const struct mt9v02x_register mt9v024_register = {
|
|
.max_total_shutter_width = MT9V024_MAX_TOTAL_SHUTTER_WIDTH,
|
|
.pixclk_fv_lv = MT9V024_PIXCLK_FV_LV,
|
|
};
|
|
|
|
enum mt9v022_model {
|
|
MT9V022IX7ATM,
|
|
MT9V022IX7ATC,
|
|
};
|
|
|
|
struct mt9v022 {
|
|
struct v4l2_subdev subdev;
|
|
struct v4l2_ctrl_handler hdl;
|
|
struct {
|
|
/* exposure/auto-exposure cluster */
|
|
struct v4l2_ctrl *autoexposure;
|
|
struct v4l2_ctrl *exposure;
|
|
};
|
|
struct {
|
|
/* gain/auto-gain cluster */
|
|
struct v4l2_ctrl *autogain;
|
|
struct v4l2_ctrl *gain;
|
|
};
|
|
struct v4l2_ctrl *hblank;
|
|
struct v4l2_ctrl *vblank;
|
|
struct v4l2_rect rect; /* Sensor window */
|
|
struct v4l2_clk *clk;
|
|
const struct mt9v022_datafmt *fmt;
|
|
const struct mt9v022_datafmt *fmts;
|
|
const struct mt9v02x_register *reg;
|
|
int num_fmts;
|
|
enum mt9v022_model model;
|
|
u16 chip_control;
|
|
u16 chip_version;
|
|
unsigned short y_skip_top; /* Lines to skip at the top */
|
|
};
|
|
|
|
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)
|
|
{
|
|
return i2c_smbus_read_word_swapped(client, reg);
|
|
}
|
|
|
|
static int reg_write(struct i2c_client *client, const u8 reg,
|
|
const u16 data)
|
|
{
|
|
return i2c_smbus_write_word_swapped(client, reg, 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 i2c_client *client)
|
|
{
|
|
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_ANALOG_GAIN, 16);
|
|
if (!ret)
|
|
ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH, 480);
|
|
if (!ret)
|
|
ret = reg_write(client, mt9v022->reg->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);
|
|
if (!ret)
|
|
return v4l2_ctrl_handler_setup(&mt9v022->hdl);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int mt9v022_s_stream(struct v4l2_subdev *sd, int enable)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct mt9v022 *mt9v022 = to_mt9v022(client);
|
|
|
|
if (enable) {
|
|
/* Switch to master "normal" mode */
|
|
mt9v022->chip_control &= ~0x10;
|
|
if (is_mt9v022_rev3(mt9v022->chip_version) ||
|
|
is_mt9v024(mt9v022->chip_version)) {
|
|
/*
|
|
* Unset snapshot mode specific settings: clear bit 9
|
|
* and bit 2 in reg. 0x20 when in normal mode.
|
|
*/
|
|
if (reg_clear(client, MT9V022_REG32, 0x204))
|
|
return -EIO;
|
|
}
|
|
} else {
|
|
/* Switch to snapshot mode */
|
|
mt9v022->chip_control |= 0x10;
|
|
if (is_mt9v022_rev3(mt9v022->chip_version) ||
|
|
is_mt9v024(mt9v022->chip_version)) {
|
|
/*
|
|
* Required settings for snapshot mode: set bit 9
|
|
* (RST enable) and bit 2 (CR enable) in reg. 0x20
|
|
* See TechNote TN0960 or TN-09-225.
|
|
*/
|
|
if (reg_set(client, MT9V022_REG32, 0x204))
|
|
return -EIO;
|
|
}
|
|
}
|
|
|
|
if (reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control) < 0)
|
|
return -EIO;
|
|
return 0;
|
|
}
|
|
|
|
static int mt9v022_set_selection(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_pad_config *cfg,
|
|
struct v4l2_subdev_selection *sel)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct mt9v022 *mt9v022 = to_mt9v022(client);
|
|
struct v4l2_rect rect = sel->r;
|
|
int min_row, min_blank;
|
|
int ret;
|
|
|
|
if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE ||
|
|
sel->target != V4L2_SEL_TGT_CROP)
|
|
return -EINVAL;
|
|
|
|
/* Bayer format - even size lengths */
|
|
if (mt9v022->fmts == mt9v022_colour_fmts) {
|
|
rect.width = ALIGN(rect.width, 2);
|
|
rect.height = ALIGN(rect.height, 2);
|
|
/* Let the user play with the starting pixel */
|
|
}
|
|
|
|
soc_camera_limit_side(&rect.left, &rect.width,
|
|
MT9V022_COLUMN_SKIP, MT9V022_MIN_WIDTH, MT9V022_MAX_WIDTH);
|
|
|
|
soc_camera_limit_side(&rect.top, &rect.height,
|
|
MT9V022_ROW_SKIP, MT9V022_MIN_HEIGHT, MT9V022_MAX_HEIGHT);
|
|
|
|
/* 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->reg->max_total_shutter_width,
|
|
rect.height + mt9v022->y_skip_top + 43);
|
|
/*
|
|
* If autoexposure is off, there is no need to set
|
|
* MT9V022_TOTAL_SHUTTER_WIDTH here. Autoexposure can be off
|
|
* only if the user has set exposure manually, using the
|
|
* V4L2_CID_EXPOSURE_AUTO with the value V4L2_EXPOSURE_MANUAL.
|
|
* In this case the register MT9V022_TOTAL_SHUTTER_WIDTH
|
|
* already contains the correct value.
|
|
*/
|
|
}
|
|
/* 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);
|
|
/*
|
|
* mt9v022: min total row time is 660 columns, min blanking is 43
|
|
* mt9v024: min total row time is 690 columns, min blanking is 61
|
|
*/
|
|
if (is_mt9v024(mt9v022->chip_version)) {
|
|
min_row = 690;
|
|
min_blank = 61;
|
|
} else {
|
|
min_row = 660;
|
|
min_blank = 43;
|
|
}
|
|
if (!ret)
|
|
ret = v4l2_ctrl_s_ctrl(mt9v022->hblank,
|
|
rect.width > min_row - min_blank ?
|
|
min_blank : min_row - rect.width);
|
|
if (!ret)
|
|
ret = v4l2_ctrl_s_ctrl(mt9v022->vblank, 45);
|
|
if (!ret)
|
|
ret = reg_write(client, MT9V022_WINDOW_WIDTH, rect.width);
|
|
if (!ret)
|
|
ret = reg_write(client, MT9V022_WINDOW_HEIGHT,
|
|
rect.height + mt9v022->y_skip_top);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
dev_dbg(&client->dev, "Frame %dx%d pixel\n", rect.width, rect.height);
|
|
|
|
mt9v022->rect = rect;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mt9v022_get_selection(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_pad_config *cfg,
|
|
struct v4l2_subdev_selection *sel)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct mt9v022 *mt9v022 = to_mt9v022(client);
|
|
|
|
if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
|
|
return -EINVAL;
|
|
|
|
switch (sel->target) {
|
|
case V4L2_SEL_TGT_CROP_BOUNDS:
|
|
case V4L2_SEL_TGT_CROP_DEFAULT:
|
|
sel->r.left = MT9V022_COLUMN_SKIP;
|
|
sel->r.top = MT9V022_ROW_SKIP;
|
|
sel->r.width = MT9V022_MAX_WIDTH;
|
|
sel->r.height = MT9V022_MAX_HEIGHT;
|
|
return 0;
|
|
case V4L2_SEL_TGT_CROP:
|
|
sel->r = mt9v022->rect;
|
|
return 0;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int mt9v022_get_fmt(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_pad_config *cfg,
|
|
struct v4l2_subdev_format *format)
|
|
{
|
|
struct v4l2_mbus_framefmt *mf = &format->format;
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct mt9v022 *mt9v022 = to_mt9v022(client);
|
|
|
|
if (format->pad)
|
|
return -EINVAL;
|
|
|
|
mf->width = mt9v022->rect.width;
|
|
mf->height = mt9v022->rect.height;
|
|
mf->code = mt9v022->fmt->code;
|
|
mf->colorspace = mt9v022->fmt->colorspace;
|
|
mf->field = V4L2_FIELD_NONE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mt9v022_s_fmt(struct v4l2_subdev *sd,
|
|
const struct mt9v022_datafmt *fmt,
|
|
struct v4l2_mbus_framefmt *mf)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct mt9v022 *mt9v022 = to_mt9v022(client);
|
|
struct v4l2_subdev_selection sel = {
|
|
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
|
|
.target = V4L2_SEL_TGT_CROP,
|
|
.r.left = mt9v022->rect.left,
|
|
.r.top = mt9v022->rect.top,
|
|
.r.width = mf->width,
|
|
.r.height = mf->height,
|
|
};
|
|
int ret;
|
|
|
|
/*
|
|
* The caller provides a supported format, as verified per call to
|
|
* .set_fmt(FORMAT_TRY), datawidth is from our supported format list
|
|
*/
|
|
switch (mf->code) {
|
|
case MEDIA_BUS_FMT_Y8_1X8:
|
|
case MEDIA_BUS_FMT_Y10_1X10:
|
|
if (mt9v022->model != MT9V022IX7ATM)
|
|
return -EINVAL;
|
|
break;
|
|
case MEDIA_BUS_FMT_SBGGR8_1X8:
|
|
case MEDIA_BUS_FMT_SBGGR10_1X10:
|
|
if (mt9v022->model != MT9V022IX7ATC)
|
|
return -EINVAL;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* No support for scaling on this camera, just crop. */
|
|
ret = mt9v022_set_selection(sd, NULL, &sel);
|
|
if (!ret) {
|
|
mf->width = mt9v022->rect.width;
|
|
mf->height = mt9v022->rect.height;
|
|
mt9v022->fmt = fmt;
|
|
mf->colorspace = fmt->colorspace;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int mt9v022_set_fmt(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_pad_config *cfg,
|
|
struct v4l2_subdev_format *format)
|
|
{
|
|
struct v4l2_mbus_framefmt *mf = &format->format;
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct mt9v022 *mt9v022 = to_mt9v022(client);
|
|
const struct mt9v022_datafmt *fmt;
|
|
int align = mf->code == MEDIA_BUS_FMT_SBGGR8_1X8 ||
|
|
mf->code == MEDIA_BUS_FMT_SBGGR10_1X10;
|
|
|
|
if (format->pad)
|
|
return -EINVAL;
|
|
|
|
v4l_bound_align_image(&mf->width, MT9V022_MIN_WIDTH,
|
|
MT9V022_MAX_WIDTH, align,
|
|
&mf->height, MT9V022_MIN_HEIGHT + mt9v022->y_skip_top,
|
|
MT9V022_MAX_HEIGHT + mt9v022->y_skip_top, align, 0);
|
|
|
|
fmt = mt9v022_find_datafmt(mf->code, mt9v022->fmts,
|
|
mt9v022->num_fmts);
|
|
if (!fmt) {
|
|
fmt = mt9v022->fmt;
|
|
mf->code = fmt->code;
|
|
}
|
|
|
|
mf->colorspace = fmt->colorspace;
|
|
|
|
if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
|
|
return mt9v022_s_fmt(sd, fmt, mf);
|
|
cfg->try_fmt = *mf;
|
|
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 = v4l2_get_subdevdata(sd);
|
|
|
|
if (reg->reg > 0xff)
|
|
return -EINVAL;
|
|
|
|
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,
|
|
const struct v4l2_dbg_register *reg)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
|
|
if (reg->reg > 0xff)
|
|
return -EINVAL;
|
|
|
|
if (reg_write(client, reg->reg, reg->val) < 0)
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int mt9v022_s_power(struct v4l2_subdev *sd, int on)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
|
|
struct mt9v022 *mt9v022 = to_mt9v022(client);
|
|
|
|
return soc_camera_set_power(&client->dev, ssdd, mt9v022->clk, on);
|
|
}
|
|
|
|
static int mt9v022_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
|
|
{
|
|
struct mt9v022 *mt9v022 = container_of(ctrl->handler,
|
|
struct mt9v022, hdl);
|
|
struct v4l2_subdev *sd = &mt9v022->subdev;
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct v4l2_ctrl *gain = mt9v022->gain;
|
|
struct v4l2_ctrl *exp = mt9v022->exposure;
|
|
unsigned long range;
|
|
int data;
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_AUTOGAIN:
|
|
data = reg_read(client, MT9V022_ANALOG_GAIN);
|
|
if (data < 0)
|
|
return -EIO;
|
|
|
|
range = gain->maximum - gain->minimum;
|
|
gain->val = ((data - 16) * range + 24) / 48 + gain->minimum;
|
|
return 0;
|
|
case V4L2_CID_EXPOSURE_AUTO:
|
|
data = reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH);
|
|
if (data < 0)
|
|
return -EIO;
|
|
|
|
range = exp->maximum - exp->minimum;
|
|
exp->val = ((data - 1) * range + 239) / 479 + exp->minimum;
|
|
return 0;
|
|
case V4L2_CID_HBLANK:
|
|
data = reg_read(client, MT9V022_HORIZONTAL_BLANKING);
|
|
if (data < 0)
|
|
return -EIO;
|
|
ctrl->val = data;
|
|
return 0;
|
|
case V4L2_CID_VBLANK:
|
|
data = reg_read(client, MT9V022_VERTICAL_BLANKING);
|
|
if (data < 0)
|
|
return -EIO;
|
|
ctrl->val = data;
|
|
return 0;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int mt9v022_s_ctrl(struct v4l2_ctrl *ctrl)
|
|
{
|
|
struct mt9v022 *mt9v022 = container_of(ctrl->handler,
|
|
struct mt9v022, hdl);
|
|
struct v4l2_subdev *sd = &mt9v022->subdev;
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
int data;
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_VFLIP:
|
|
if (ctrl->val)
|
|
data = reg_set(client, MT9V022_READ_MODE, 0x10);
|
|
else
|
|
data = reg_clear(client, MT9V022_READ_MODE, 0x10);
|
|
if (data < 0)
|
|
return -EIO;
|
|
return 0;
|
|
case V4L2_CID_HFLIP:
|
|
if (ctrl->val)
|
|
data = reg_set(client, MT9V022_READ_MODE, 0x20);
|
|
else
|
|
data = reg_clear(client, MT9V022_READ_MODE, 0x20);
|
|
if (data < 0)
|
|
return -EIO;
|
|
return 0;
|
|
case V4L2_CID_AUTOGAIN:
|
|
if (ctrl->val) {
|
|
if (reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
|
|
return -EIO;
|
|
} else {
|
|
struct v4l2_ctrl *gain = mt9v022->gain;
|
|
/* mt9v022 has minimum == default */
|
|
unsigned long range = gain->maximum - gain->minimum;
|
|
/* Valid values 16 to 64, 32 to 64 must be even. */
|
|
unsigned long gain_val = ((gain->val - (s32)gain->minimum) *
|
|
48 + range / 2) / range + 16;
|
|
|
|
if (gain_val >= 32)
|
|
gain_val &= ~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_dbg(&client->dev, "Setting gain from %d to %lu\n",
|
|
reg_read(client, MT9V022_ANALOG_GAIN), gain_val);
|
|
if (reg_write(client, MT9V022_ANALOG_GAIN, gain_val) < 0)
|
|
return -EIO;
|
|
}
|
|
return 0;
|
|
case V4L2_CID_EXPOSURE_AUTO:
|
|
if (ctrl->val == V4L2_EXPOSURE_AUTO) {
|
|
data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x1);
|
|
} else {
|
|
struct v4l2_ctrl *exp = mt9v022->exposure;
|
|
unsigned long range = exp->maximum - exp->minimum;
|
|
unsigned long shutter = ((exp->val - (s32)exp->minimum) *
|
|
479 + range / 2) / range + 1;
|
|
|
|
/*
|
|
* The user wants to set shutter width manually, hope,
|
|
* she knows, what she's doing... Switch AEC off.
|
|
*/
|
|
data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1);
|
|
if (data < 0)
|
|
return -EIO;
|
|
dev_dbg(&client->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;
|
|
}
|
|
return 0;
|
|
case V4L2_CID_HBLANK:
|
|
if (reg_write(client, MT9V022_HORIZONTAL_BLANKING,
|
|
ctrl->val) < 0)
|
|
return -EIO;
|
|
return 0;
|
|
case V4L2_CID_VBLANK:
|
|
if (reg_write(client, MT9V022_VERTICAL_BLANKING,
|
|
ctrl->val) < 0)
|
|
return -EIO;
|
|
return 0;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* 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 i2c_client *client)
|
|
{
|
|
struct mt9v022 *mt9v022 = to_mt9v022(client);
|
|
struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
|
|
s32 data;
|
|
int ret;
|
|
unsigned long flags;
|
|
|
|
ret = mt9v022_s_power(&mt9v022->subdev, 1);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Read out the chip version register */
|
|
data = reg_read(client, MT9V022_CHIP_VERSION);
|
|
|
|
/* must be 0x1311, 0x1313 or 0x1324 */
|
|
if (data != 0x1311 && data != 0x1313 && data != 0x1324) {
|
|
ret = -ENODEV;
|
|
dev_info(&client->dev, "No MT9V022 found, ID register 0x%x\n",
|
|
data);
|
|
goto ei2c;
|
|
}
|
|
|
|
mt9v022->chip_version = data;
|
|
|
|
mt9v022->reg = is_mt9v024(data) ? &mt9v024_register :
|
|
&mt9v022_register;
|
|
|
|
/* 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(&client->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 = MT9V022IX7ATC;
|
|
mt9v022->fmts = mt9v022_colour_fmts;
|
|
} else {
|
|
ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 0x11);
|
|
mt9v022->model = MT9V022IX7ATM;
|
|
mt9v022->fmts = mt9v022_monochrome_fmts;
|
|
}
|
|
|
|
if (ret < 0)
|
|
goto ei2c;
|
|
|
|
mt9v022->num_fmts = 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 (ssdd->query_bus_param)
|
|
flags = ssdd->query_bus_param(ssdd);
|
|
else
|
|
flags = SOCAM_DATAWIDTH_10;
|
|
|
|
if (flags & SOCAM_DATAWIDTH_10)
|
|
mt9v022->num_fmts++;
|
|
else
|
|
mt9v022->fmts++;
|
|
|
|
if (flags & SOCAM_DATAWIDTH_8)
|
|
mt9v022->num_fmts++;
|
|
|
|
mt9v022->fmt = &mt9v022->fmts[0];
|
|
|
|
dev_info(&client->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
|
|
data, mt9v022->model == MT9V022IX7ATM ?
|
|
"monochrome" : "colour");
|
|
|
|
ret = mt9v022_init(client);
|
|
if (ret < 0)
|
|
dev_err(&client->dev, "Failed to initialise the camera\n");
|
|
|
|
ei2c:
|
|
mt9v022_s_power(&mt9v022->subdev, 0);
|
|
return ret;
|
|
}
|
|
|
|
static int mt9v022_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct mt9v022 *mt9v022 = to_mt9v022(client);
|
|
|
|
*lines = mt9v022->y_skip_top;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct v4l2_ctrl_ops mt9v022_ctrl_ops = {
|
|
.g_volatile_ctrl = mt9v022_g_volatile_ctrl,
|
|
.s_ctrl = mt9v022_s_ctrl,
|
|
};
|
|
|
|
static const struct v4l2_subdev_core_ops mt9v022_subdev_core_ops = {
|
|
#ifdef CONFIG_VIDEO_ADV_DEBUG
|
|
.g_register = mt9v022_g_register,
|
|
.s_register = mt9v022_s_register,
|
|
#endif
|
|
.s_power = mt9v022_s_power,
|
|
};
|
|
|
|
static int mt9v022_enum_mbus_code(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_pad_config *cfg,
|
|
struct v4l2_subdev_mbus_code_enum *code)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct mt9v022 *mt9v022 = to_mt9v022(client);
|
|
|
|
if (code->pad || code->index >= mt9v022->num_fmts)
|
|
return -EINVAL;
|
|
|
|
code->code = mt9v022->fmts[code->index].code;
|
|
return 0;
|
|
}
|
|
|
|
static int mt9v022_g_mbus_config(struct v4l2_subdev *sd,
|
|
struct v4l2_mbus_config *cfg)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
|
|
|
|
cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_SLAVE |
|
|
V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING |
|
|
V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW |
|
|
V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW |
|
|
V4L2_MBUS_DATA_ACTIVE_HIGH;
|
|
cfg->type = V4L2_MBUS_PARALLEL;
|
|
cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mt9v022_s_mbus_config(struct v4l2_subdev *sd,
|
|
const struct v4l2_mbus_config *cfg)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
|
|
struct mt9v022 *mt9v022 = to_mt9v022(client);
|
|
unsigned long flags = soc_camera_apply_board_flags(ssdd, cfg);
|
|
unsigned int bps = soc_mbus_get_fmtdesc(mt9v022->fmt->code)->bits_per_sample;
|
|
int ret;
|
|
u16 pixclk = 0;
|
|
|
|
if (ssdd->set_bus_param) {
|
|
ret = ssdd->set_bus_param(ssdd, 1 << (bps - 1));
|
|
if (ret)
|
|
return ret;
|
|
} else if (bps != 10) {
|
|
/*
|
|
* Without board specific bus width settings we only support the
|
|
* sensors native bus width
|
|
*/
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
|
|
pixclk |= 0x10;
|
|
|
|
if (!(flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH))
|
|
pixclk |= 0x1;
|
|
|
|
if (!(flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH))
|
|
pixclk |= 0x2;
|
|
|
|
ret = reg_write(client, mt9v022->reg->pixclk_fv_lv, pixclk);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (!(flags & V4L2_MBUS_MASTER))
|
|
mt9v022->chip_control &= ~0x8;
|
|
|
|
ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
dev_dbg(&client->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
|
|
pixclk, mt9v022->chip_control);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct v4l2_subdev_video_ops mt9v022_subdev_video_ops = {
|
|
.s_stream = mt9v022_s_stream,
|
|
.g_mbus_config = mt9v022_g_mbus_config,
|
|
.s_mbus_config = mt9v022_s_mbus_config,
|
|
};
|
|
|
|
static const struct v4l2_subdev_sensor_ops mt9v022_subdev_sensor_ops = {
|
|
.g_skip_top_lines = mt9v022_g_skip_top_lines,
|
|
};
|
|
|
|
static const struct v4l2_subdev_pad_ops mt9v022_subdev_pad_ops = {
|
|
.enum_mbus_code = mt9v022_enum_mbus_code,
|
|
.get_selection = mt9v022_get_selection,
|
|
.set_selection = mt9v022_set_selection,
|
|
.get_fmt = mt9v022_get_fmt,
|
|
.set_fmt = mt9v022_set_fmt,
|
|
};
|
|
|
|
static const struct v4l2_subdev_ops mt9v022_subdev_ops = {
|
|
.core = &mt9v022_subdev_core_ops,
|
|
.video = &mt9v022_subdev_video_ops,
|
|
.sensor = &mt9v022_subdev_sensor_ops,
|
|
.pad = &mt9v022_subdev_pad_ops,
|
|
};
|
|
|
|
static int mt9v022_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *did)
|
|
{
|
|
struct mt9v022 *mt9v022;
|
|
struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
|
|
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
|
|
struct mt9v022_platform_data *pdata;
|
|
int ret;
|
|
|
|
if (!ssdd) {
|
|
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 = devm_kzalloc(&client->dev, sizeof(struct mt9v022), GFP_KERNEL);
|
|
if (!mt9v022)
|
|
return -ENOMEM;
|
|
|
|
pdata = ssdd->drv_priv;
|
|
v4l2_i2c_subdev_init(&mt9v022->subdev, client, &mt9v022_subdev_ops);
|
|
v4l2_ctrl_handler_init(&mt9v022->hdl, 6);
|
|
v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
|
|
V4L2_CID_VFLIP, 0, 1, 1, 0);
|
|
v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
|
|
V4L2_CID_HFLIP, 0, 1, 1, 0);
|
|
mt9v022->autogain = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
|
|
V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
|
|
mt9v022->gain = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
|
|
V4L2_CID_GAIN, 0, 127, 1, 64);
|
|
|
|
/*
|
|
* Simulated autoexposure. If enabled, we calculate shutter width
|
|
* ourselves in the driver based on vertical blanking and frame width
|
|
*/
|
|
mt9v022->autoexposure = v4l2_ctrl_new_std_menu(&mt9v022->hdl,
|
|
&mt9v022_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
|
|
V4L2_EXPOSURE_AUTO);
|
|
mt9v022->exposure = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
|
|
V4L2_CID_EXPOSURE, 1, 255, 1, 255);
|
|
|
|
mt9v022->hblank = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
|
|
V4L2_CID_HBLANK, MT9V022_HORIZONTAL_BLANKING_MIN,
|
|
MT9V022_HORIZONTAL_BLANKING_MAX, 1,
|
|
MT9V022_HORIZONTAL_BLANKING_DEF);
|
|
|
|
mt9v022->vblank = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
|
|
V4L2_CID_VBLANK, MT9V022_VERTICAL_BLANKING_MIN,
|
|
MT9V022_VERTICAL_BLANKING_MAX, 1,
|
|
MT9V022_VERTICAL_BLANKING_DEF);
|
|
|
|
mt9v022->subdev.ctrl_handler = &mt9v022->hdl;
|
|
if (mt9v022->hdl.error) {
|
|
int err = mt9v022->hdl.error;
|
|
|
|
dev_err(&client->dev, "control initialisation err %d\n", err);
|
|
return err;
|
|
}
|
|
v4l2_ctrl_auto_cluster(2, &mt9v022->autoexposure,
|
|
V4L2_EXPOSURE_MANUAL, true);
|
|
v4l2_ctrl_auto_cluster(2, &mt9v022->autogain, 0, true);
|
|
|
|
mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
|
|
|
|
/*
|
|
* On some platforms the first read out line is corrupted.
|
|
* Workaround it by skipping if indicated by platform data.
|
|
*/
|
|
mt9v022->y_skip_top = pdata ? pdata->y_skip_top : 0;
|
|
mt9v022->rect.left = MT9V022_COLUMN_SKIP;
|
|
mt9v022->rect.top = MT9V022_ROW_SKIP;
|
|
mt9v022->rect.width = MT9V022_MAX_WIDTH;
|
|
mt9v022->rect.height = MT9V022_MAX_HEIGHT;
|
|
|
|
mt9v022->clk = v4l2_clk_get(&client->dev, "mclk");
|
|
if (IS_ERR(mt9v022->clk)) {
|
|
ret = PTR_ERR(mt9v022->clk);
|
|
goto eclkget;
|
|
}
|
|
|
|
ret = mt9v022_video_probe(client);
|
|
if (ret) {
|
|
v4l2_clk_put(mt9v022->clk);
|
|
eclkget:
|
|
v4l2_ctrl_handler_free(&mt9v022->hdl);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int mt9v022_remove(struct i2c_client *client)
|
|
{
|
|
struct mt9v022 *mt9v022 = to_mt9v022(client);
|
|
struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
|
|
|
|
v4l2_clk_put(mt9v022->clk);
|
|
v4l2_device_unregister_subdev(&mt9v022->subdev);
|
|
if (ssdd->free_bus)
|
|
ssdd->free_bus(ssdd);
|
|
v4l2_ctrl_handler_free(&mt9v022->hdl);
|
|
|
|
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,
|
|
};
|
|
|
|
module_i2c_driver(mt9v022_i2c_driver);
|
|
|
|
MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
|
|
MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
|
|
MODULE_LICENSE("GPL");
|