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linux-stable/drivers/media/i2c/mt9m032.c
Thomas Gleixner 1802d0beec treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 
Based on 1 normalized pattern(s):

  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 this program is
  distributed in the hope that it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 655 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:41 -07:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for MT9M032 CMOS Image Sensor from Micron
*
* Copyright (C) 2010-2011 Lund Engineering
* Contact: Gil Lund <gwlund@lundeng.com>
* Author: Martin Hostettler <martin@neutronstar.dyndns.org>
*/
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/math64.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/v4l2-mediabus.h>
#include <media/media-entity.h>
#include <media/i2c/mt9m032.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-subdev.h>
#include "aptina-pll.h"
/*
* width and height include active boundary and black parts
*
* column 0- 15 active boundary
* column 16-1455 image
* column 1456-1471 active boundary
* column 1472-1599 black
*
* row 0- 51 black
* row 53- 59 active boundary
* row 60-1139 image
* row 1140-1147 active boundary
* row 1148-1151 black
*/
#define MT9M032_PIXEL_ARRAY_WIDTH 1600
#define MT9M032_PIXEL_ARRAY_HEIGHT 1152
#define MT9M032_CHIP_VERSION 0x00
#define MT9M032_CHIP_VERSION_VALUE 0x1402
#define MT9M032_ROW_START 0x01
#define MT9M032_ROW_START_MIN 0
#define MT9M032_ROW_START_MAX 1152
#define MT9M032_ROW_START_DEF 60
#define MT9M032_COLUMN_START 0x02
#define MT9M032_COLUMN_START_MIN 0
#define MT9M032_COLUMN_START_MAX 1600
#define MT9M032_COLUMN_START_DEF 16
#define MT9M032_ROW_SIZE 0x03
#define MT9M032_ROW_SIZE_MIN 32
#define MT9M032_ROW_SIZE_MAX 1152
#define MT9M032_ROW_SIZE_DEF 1080
#define MT9M032_COLUMN_SIZE 0x04
#define MT9M032_COLUMN_SIZE_MIN 32
#define MT9M032_COLUMN_SIZE_MAX 1600
#define MT9M032_COLUMN_SIZE_DEF 1440
#define MT9M032_HBLANK 0x05
#define MT9M032_VBLANK 0x06
#define MT9M032_VBLANK_MAX 0x7ff
#define MT9M032_SHUTTER_WIDTH_HIGH 0x08
#define MT9M032_SHUTTER_WIDTH_LOW 0x09
#define MT9M032_SHUTTER_WIDTH_MIN 1
#define MT9M032_SHUTTER_WIDTH_MAX 1048575
#define MT9M032_SHUTTER_WIDTH_DEF 1943
#define MT9M032_PIX_CLK_CTRL 0x0a
#define MT9M032_PIX_CLK_CTRL_INV_PIXCLK 0x8000
#define MT9M032_RESTART 0x0b
#define MT9M032_RESET 0x0d
#define MT9M032_PLL_CONFIG1 0x11
#define MT9M032_PLL_CONFIG1_PREDIV_MASK 0x3f
#define MT9M032_PLL_CONFIG1_MUL_SHIFT 8
#define MT9M032_READ_MODE1 0x1e
#define MT9M032_READ_MODE1_OUTPUT_BAD_FRAMES (1 << 13)
#define MT9M032_READ_MODE1_MAINTAIN_FRAME_RATE (1 << 12)
#define MT9M032_READ_MODE1_XOR_LINE_VALID (1 << 11)
#define MT9M032_READ_MODE1_CONT_LINE_VALID (1 << 10)
#define MT9M032_READ_MODE1_INVERT_TRIGGER (1 << 9)
#define MT9M032_READ_MODE1_SNAPSHOT (1 << 8)
#define MT9M032_READ_MODE1_GLOBAL_RESET (1 << 7)
#define MT9M032_READ_MODE1_BULB_EXPOSURE (1 << 6)
#define MT9M032_READ_MODE1_INVERT_STROBE (1 << 5)
#define MT9M032_READ_MODE1_STROBE_ENABLE (1 << 4)
#define MT9M032_READ_MODE1_STROBE_START_TRIG1 (0 << 2)
#define MT9M032_READ_MODE1_STROBE_START_EXP (1 << 2)
#define MT9M032_READ_MODE1_STROBE_START_SHUTTER (2 << 2)
#define MT9M032_READ_MODE1_STROBE_START_TRIG2 (3 << 2)
#define MT9M032_READ_MODE1_STROBE_END_TRIG1 (0 << 0)
#define MT9M032_READ_MODE1_STROBE_END_EXP (1 << 0)
#define MT9M032_READ_MODE1_STROBE_END_SHUTTER (2 << 0)
#define MT9M032_READ_MODE1_STROBE_END_TRIG2 (3 << 0)
#define MT9M032_READ_MODE2 0x20
#define MT9M032_READ_MODE2_VFLIP_SHIFT 15
#define MT9M032_READ_MODE2_HFLIP_SHIFT 14
#define MT9M032_READ_MODE2_ROW_BLC 0x40
#define MT9M032_GAIN_GREEN1 0x2b
#define MT9M032_GAIN_BLUE 0x2c
#define MT9M032_GAIN_RED 0x2d
#define MT9M032_GAIN_GREEN2 0x2e
/* write only */
#define MT9M032_GAIN_ALL 0x35
#define MT9M032_GAIN_DIGITAL_MASK 0x7f
#define MT9M032_GAIN_DIGITAL_SHIFT 8
#define MT9M032_GAIN_AMUL_SHIFT 6
#define MT9M032_GAIN_ANALOG_MASK 0x3f
#define MT9M032_FORMATTER1 0x9e
#define MT9M032_FORMATTER1_PLL_P1_6 (1 << 8)
#define MT9M032_FORMATTER1_PARALLEL (1 << 12)
#define MT9M032_FORMATTER2 0x9f
#define MT9M032_FORMATTER2_DOUT_EN 0x1000
#define MT9M032_FORMATTER2_PIXCLK_EN 0x2000
/*
* The available MT9M032 datasheet is missing documentation for register 0x10
* MT9P031 seems to be close enough, so use constants from that datasheet for
* now.
* But keep the name MT9P031 to remind us, that this isn't really confirmed
* for this sensor.
*/
#define MT9P031_PLL_CONTROL 0x10
#define MT9P031_PLL_CONTROL_PWROFF 0x0050
#define MT9P031_PLL_CONTROL_PWRON 0x0051
#define MT9P031_PLL_CONTROL_USEPLL 0x0052
struct mt9m032 {
struct v4l2_subdev subdev;
struct media_pad pad;
struct mt9m032_platform_data *pdata;
unsigned int pix_clock;
struct v4l2_ctrl_handler ctrls;
struct {
struct v4l2_ctrl *hflip;
struct v4l2_ctrl *vflip;
};
struct mutex lock; /* Protects streaming, format, interval and crop */
bool streaming;
struct v4l2_mbus_framefmt format;
struct v4l2_rect crop;
struct v4l2_fract frame_interval;
};
#define to_mt9m032(sd) container_of(sd, struct mt9m032, subdev)
#define to_dev(sensor) \
(&((struct i2c_client *)v4l2_get_subdevdata(&(sensor)->subdev))->dev)
static int mt9m032_read(struct i2c_client *client, u8 reg)
{
return i2c_smbus_read_word_swapped(client, reg);
}
static int mt9m032_write(struct i2c_client *client, u8 reg, const u16 data)
{
return i2c_smbus_write_word_swapped(client, reg, data);
}
static u32 mt9m032_row_time(struct mt9m032 *sensor, unsigned int width)
{
unsigned int effective_width;
u32 ns;
effective_width = width + 716; /* empirical value */
ns = div_u64(1000000000ULL * effective_width, sensor->pix_clock);
dev_dbg(to_dev(sensor), "MT9M032 line time: %u ns\n", ns);
return ns;
}
static int mt9m032_update_timing(struct mt9m032 *sensor,
struct v4l2_fract *interval)
{
struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
struct v4l2_rect *crop = &sensor->crop;
unsigned int min_vblank;
unsigned int vblank;
u32 row_time;
if (!interval)
interval = &sensor->frame_interval;
row_time = mt9m032_row_time(sensor, crop->width);
vblank = div_u64(1000000000ULL * interval->numerator,
(u64)row_time * interval->denominator)
- crop->height;
if (vblank > MT9M032_VBLANK_MAX) {
/* hardware limits to 11 bit values */
interval->denominator = 1000;
interval->numerator =
div_u64((crop->height + MT9M032_VBLANK_MAX) *
(u64)row_time * interval->denominator,
1000000000ULL);
vblank = div_u64(1000000000ULL * interval->numerator,
(u64)row_time * interval->denominator)
- crop->height;
}
/* enforce minimal 1.6ms blanking time. */
min_vblank = 1600000 / row_time;
vblank = clamp_t(unsigned int, vblank, min_vblank, MT9M032_VBLANK_MAX);
return mt9m032_write(client, MT9M032_VBLANK, vblank);
}
static int mt9m032_update_geom_timing(struct mt9m032 *sensor)
{
struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
int ret;
ret = mt9m032_write(client, MT9M032_COLUMN_SIZE,
sensor->crop.width - 1);
if (!ret)
ret = mt9m032_write(client, MT9M032_ROW_SIZE,
sensor->crop.height - 1);
if (!ret)
ret = mt9m032_write(client, MT9M032_COLUMN_START,
sensor->crop.left);
if (!ret)
ret = mt9m032_write(client, MT9M032_ROW_START,
sensor->crop.top);
if (!ret)
ret = mt9m032_update_timing(sensor, NULL);
return ret;
}
static int update_formatter2(struct mt9m032 *sensor, bool streaming)
{
struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
u16 reg_val = MT9M032_FORMATTER2_DOUT_EN
| 0x0070; /* parts reserved! */
/* possibly for changing to 14-bit mode */
if (streaming)
reg_val |= MT9M032_FORMATTER2_PIXCLK_EN; /* pixclock enable */
return mt9m032_write(client, MT9M032_FORMATTER2, reg_val);
}
static int mt9m032_setup_pll(struct mt9m032 *sensor)
{
static const struct aptina_pll_limits limits = {
.ext_clock_min = 8000000,
.ext_clock_max = 16500000,
.int_clock_min = 2000000,
.int_clock_max = 24000000,
.out_clock_min = 322000000,
.out_clock_max = 693000000,
.pix_clock_max = 99000000,
.n_min = 1,
.n_max = 64,
.m_min = 16,
.m_max = 255,
.p1_min = 6,
.p1_max = 7,
};
struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
struct mt9m032_platform_data *pdata = sensor->pdata;
struct aptina_pll pll;
u16 reg_val;
int ret;
pll.ext_clock = pdata->ext_clock;
pll.pix_clock = pdata->pix_clock;
ret = aptina_pll_calculate(&client->dev, &limits, &pll);
if (ret < 0)
return ret;
sensor->pix_clock = pdata->pix_clock;
ret = mt9m032_write(client, MT9M032_PLL_CONFIG1,
(pll.m << MT9M032_PLL_CONFIG1_MUL_SHIFT) |
((pll.n - 1) & MT9M032_PLL_CONFIG1_PREDIV_MASK));
if (!ret)
ret = mt9m032_write(client, MT9P031_PLL_CONTROL,
MT9P031_PLL_CONTROL_PWRON |
MT9P031_PLL_CONTROL_USEPLL);
if (!ret) /* more reserved, Continuous, Master Mode */
ret = mt9m032_write(client, MT9M032_READ_MODE1, 0x8000 |
MT9M032_READ_MODE1_STROBE_START_EXP |
MT9M032_READ_MODE1_STROBE_END_SHUTTER);
if (!ret) {
reg_val = (pll.p1 == 6 ? MT9M032_FORMATTER1_PLL_P1_6 : 0)
| MT9M032_FORMATTER1_PARALLEL | 0x001e; /* 14-bit */
ret = mt9m032_write(client, MT9M032_FORMATTER1, reg_val);
}
return ret;
}
/* -----------------------------------------------------------------------------
* Subdev pad operations
*/
static int mt9m032_enum_mbus_code(struct v4l2_subdev *subdev,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_mbus_code_enum *code)
{
if (code->index != 0)
return -EINVAL;
code->code = MEDIA_BUS_FMT_Y8_1X8;
return 0;
}
static int mt9m032_enum_frame_size(struct v4l2_subdev *subdev,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_frame_size_enum *fse)
{
if (fse->index != 0 || fse->code != MEDIA_BUS_FMT_Y8_1X8)
return -EINVAL;
fse->min_width = MT9M032_COLUMN_SIZE_DEF;
fse->max_width = MT9M032_COLUMN_SIZE_DEF;
fse->min_height = MT9M032_ROW_SIZE_DEF;
fse->max_height = MT9M032_ROW_SIZE_DEF;
return 0;
}
/**
* __mt9m032_get_pad_crop() - get crop rect
* @sensor: pointer to the sensor struct
* @cfg: v4l2_subdev_pad_config for getting the try crop rect from
* @which: select try or active crop rect
*
* Returns a pointer the current active or fh relative try crop rect
*/
static struct v4l2_rect *
__mt9m032_get_pad_crop(struct mt9m032 *sensor, struct v4l2_subdev_pad_config *cfg,
enum v4l2_subdev_format_whence which)
{
switch (which) {
case V4L2_SUBDEV_FORMAT_TRY:
return v4l2_subdev_get_try_crop(&sensor->subdev, cfg, 0);
case V4L2_SUBDEV_FORMAT_ACTIVE:
return &sensor->crop;
default:
return NULL;
}
}
/**
* __mt9m032_get_pad_format() - get format
* @sensor: pointer to the sensor struct
* @cfg: v4l2_subdev_pad_config for getting the try format from
* @which: select try or active format
*
* Returns a pointer the current active or fh relative try format
*/
static struct v4l2_mbus_framefmt *
__mt9m032_get_pad_format(struct mt9m032 *sensor, struct v4l2_subdev_pad_config *cfg,
enum v4l2_subdev_format_whence which)
{
switch (which) {
case V4L2_SUBDEV_FORMAT_TRY:
return v4l2_subdev_get_try_format(&sensor->subdev, cfg, 0);
case V4L2_SUBDEV_FORMAT_ACTIVE:
return &sensor->format;
default:
return NULL;
}
}
static int mt9m032_get_pad_format(struct v4l2_subdev *subdev,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct mt9m032 *sensor = to_mt9m032(subdev);
mutex_lock(&sensor->lock);
fmt->format = *__mt9m032_get_pad_format(sensor, cfg, fmt->which);
mutex_unlock(&sensor->lock);
return 0;
}
static int mt9m032_set_pad_format(struct v4l2_subdev *subdev,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct mt9m032 *sensor = to_mt9m032(subdev);
int ret;
mutex_lock(&sensor->lock);
if (sensor->streaming && fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
ret = -EBUSY;
goto done;
}
/* Scaling is not supported, the format is thus fixed. */
fmt->format = *__mt9m032_get_pad_format(sensor, cfg, fmt->which);
ret = 0;
done:
mutex_unlock(&sensor->lock);
return ret;
}
static int mt9m032_get_pad_selection(struct v4l2_subdev *subdev,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_selection *sel)
{
struct mt9m032 *sensor = to_mt9m032(subdev);
if (sel->target != V4L2_SEL_TGT_CROP)
return -EINVAL;
mutex_lock(&sensor->lock);
sel->r = *__mt9m032_get_pad_crop(sensor, cfg, sel->which);
mutex_unlock(&sensor->lock);
return 0;
}
static int mt9m032_set_pad_selection(struct v4l2_subdev *subdev,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_selection *sel)
{
struct mt9m032 *sensor = to_mt9m032(subdev);
struct v4l2_mbus_framefmt *format;
struct v4l2_rect *__crop;
struct v4l2_rect rect;
int ret = 0;
if (sel->target != V4L2_SEL_TGT_CROP)
return -EINVAL;
mutex_lock(&sensor->lock);
if (sensor->streaming && sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
ret = -EBUSY;
goto done;
}
/* Clamp the crop rectangle boundaries and align them to a multiple of 2
* pixels to ensure a GRBG Bayer pattern.
*/
rect.left = clamp(ALIGN(sel->r.left, 2), MT9M032_COLUMN_START_MIN,
MT9M032_COLUMN_START_MAX);
rect.top = clamp(ALIGN(sel->r.top, 2), MT9M032_ROW_START_MIN,
MT9M032_ROW_START_MAX);
rect.width = clamp_t(unsigned int, ALIGN(sel->r.width, 2),
MT9M032_COLUMN_SIZE_MIN, MT9M032_COLUMN_SIZE_MAX);
rect.height = clamp_t(unsigned int, ALIGN(sel->r.height, 2),
MT9M032_ROW_SIZE_MIN, MT9M032_ROW_SIZE_MAX);
rect.width = min_t(unsigned int, rect.width,
MT9M032_PIXEL_ARRAY_WIDTH - rect.left);
rect.height = min_t(unsigned int, rect.height,
MT9M032_PIXEL_ARRAY_HEIGHT - rect.top);
__crop = __mt9m032_get_pad_crop(sensor, cfg, sel->which);
if (rect.width != __crop->width || rect.height != __crop->height) {
/* Reset the output image size if the crop rectangle size has
* been modified.
*/
format = __mt9m032_get_pad_format(sensor, cfg, sel->which);
format->width = rect.width;
format->height = rect.height;
}
*__crop = rect;
sel->r = rect;
if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE)
ret = mt9m032_update_geom_timing(sensor);
done:
mutex_unlock(&sensor->lock);
return ret;
}
static int mt9m032_get_frame_interval(struct v4l2_subdev *subdev,
struct v4l2_subdev_frame_interval *fi)
{
struct mt9m032 *sensor = to_mt9m032(subdev);
mutex_lock(&sensor->lock);
memset(fi, 0, sizeof(*fi));
fi->interval = sensor->frame_interval;
mutex_unlock(&sensor->lock);
return 0;
}
static int mt9m032_set_frame_interval(struct v4l2_subdev *subdev,
struct v4l2_subdev_frame_interval *fi)
{
struct mt9m032 *sensor = to_mt9m032(subdev);
int ret;
mutex_lock(&sensor->lock);
if (sensor->streaming) {
ret = -EBUSY;
goto done;
}
/* Avoid divisions by 0. */
if (fi->interval.denominator == 0)
fi->interval.denominator = 1;
ret = mt9m032_update_timing(sensor, &fi->interval);
if (!ret)
sensor->frame_interval = fi->interval;
done:
mutex_unlock(&sensor->lock);
return ret;
}
static int mt9m032_s_stream(struct v4l2_subdev *subdev, int streaming)
{
struct mt9m032 *sensor = to_mt9m032(subdev);
int ret;
mutex_lock(&sensor->lock);
ret = update_formatter2(sensor, streaming);
if (!ret)
sensor->streaming = streaming;
mutex_unlock(&sensor->lock);
return ret;
}
/* -----------------------------------------------------------------------------
* V4L2 subdev core operations
*/
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int mt9m032_g_register(struct v4l2_subdev *sd,
struct v4l2_dbg_register *reg)
{
struct mt9m032 *sensor = to_mt9m032(sd);
struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
int val;
if (reg->reg > 0xff)
return -EINVAL;
val = mt9m032_read(client, reg->reg);
if (val < 0)
return -EIO;
reg->size = 2;
reg->val = val;
return 0;
}
static int mt9m032_s_register(struct v4l2_subdev *sd,
const struct v4l2_dbg_register *reg)
{
struct mt9m032 *sensor = to_mt9m032(sd);
struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
if (reg->reg > 0xff)
return -EINVAL;
return mt9m032_write(client, reg->reg, reg->val);
}
#endif
/* -----------------------------------------------------------------------------
* V4L2 subdev control operations
*/
static int update_read_mode2(struct mt9m032 *sensor, bool vflip, bool hflip)
{
struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
int reg_val = (vflip << MT9M032_READ_MODE2_VFLIP_SHIFT)
| (hflip << MT9M032_READ_MODE2_HFLIP_SHIFT)
| MT9M032_READ_MODE2_ROW_BLC
| 0x0007;
return mt9m032_write(client, MT9M032_READ_MODE2, reg_val);
}
static int mt9m032_set_gain(struct mt9m032 *sensor, s32 val)
{
struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
int digital_gain_val; /* in 1/8th (0..127) */
int analog_mul; /* 0 or 1 */
int analog_gain_val; /* in 1/16th. (0..63) */
u16 reg_val;
digital_gain_val = 51; /* from setup example */
if (val < 63) {
analog_mul = 0;
analog_gain_val = val;
} else {
analog_mul = 1;
analog_gain_val = val / 2;
}
/* a_gain = (1 + analog_mul) + (analog_gain_val + 1) / 16 */
/* overall_gain = a_gain * (1 + digital_gain_val / 8) */
reg_val = ((digital_gain_val & MT9M032_GAIN_DIGITAL_MASK)
<< MT9M032_GAIN_DIGITAL_SHIFT)
| ((analog_mul & 1) << MT9M032_GAIN_AMUL_SHIFT)
| (analog_gain_val & MT9M032_GAIN_ANALOG_MASK);
return mt9m032_write(client, MT9M032_GAIN_ALL, reg_val);
}
static int mt9m032_try_ctrl(struct v4l2_ctrl *ctrl)
{
if (ctrl->id == V4L2_CID_GAIN && ctrl->val >= 63) {
/* round because of multiplier used for values >= 63 */
ctrl->val &= ~1;
}
return 0;
}
static int mt9m032_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct mt9m032 *sensor =
container_of(ctrl->handler, struct mt9m032, ctrls);
struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
int ret;
switch (ctrl->id) {
case V4L2_CID_GAIN:
return mt9m032_set_gain(sensor, ctrl->val);
case V4L2_CID_HFLIP:
/* case V4L2_CID_VFLIP: -- In the same cluster */
return update_read_mode2(sensor, sensor->vflip->val,
sensor->hflip->val);
case V4L2_CID_EXPOSURE:
ret = mt9m032_write(client, MT9M032_SHUTTER_WIDTH_HIGH,
(ctrl->val >> 16) & 0xffff);
if (ret < 0)
return ret;
return mt9m032_write(client, MT9M032_SHUTTER_WIDTH_LOW,
ctrl->val & 0xffff);
}
return 0;
}
static const struct v4l2_ctrl_ops mt9m032_ctrl_ops = {
.s_ctrl = mt9m032_set_ctrl,
.try_ctrl = mt9m032_try_ctrl,
};
/* -------------------------------------------------------------------------- */
static const struct v4l2_subdev_core_ops mt9m032_core_ops = {
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = mt9m032_g_register,
.s_register = mt9m032_s_register,
#endif
};
static const struct v4l2_subdev_video_ops mt9m032_video_ops = {
.s_stream = mt9m032_s_stream,
.g_frame_interval = mt9m032_get_frame_interval,
.s_frame_interval = mt9m032_set_frame_interval,
};
static const struct v4l2_subdev_pad_ops mt9m032_pad_ops = {
.enum_mbus_code = mt9m032_enum_mbus_code,
.enum_frame_size = mt9m032_enum_frame_size,
.get_fmt = mt9m032_get_pad_format,
.set_fmt = mt9m032_set_pad_format,
.set_selection = mt9m032_set_pad_selection,
.get_selection = mt9m032_get_pad_selection,
};
static const struct v4l2_subdev_ops mt9m032_ops = {
.core = &mt9m032_core_ops,
.video = &mt9m032_video_ops,
.pad = &mt9m032_pad_ops,
};
/* -----------------------------------------------------------------------------
* Driver initialization and probing
*/
static int mt9m032_probe(struct i2c_client *client,
const struct i2c_device_id *devid)
{
struct mt9m032_platform_data *pdata = client->dev.platform_data;
struct i2c_adapter *adapter = client->adapter;
struct mt9m032 *sensor;
int chip_version;
int ret;
if (pdata == NULL) {
dev_err(&client->dev, "No platform data\n");
return -EINVAL;
}
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
dev_warn(&client->dev,
"I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
return -EIO;
}
if (!client->dev.platform_data)
return -ENODEV;
sensor = devm_kzalloc(&client->dev, sizeof(*sensor), GFP_KERNEL);
if (sensor == NULL)
return -ENOMEM;
mutex_init(&sensor->lock);
sensor->pdata = pdata;
v4l2_i2c_subdev_init(&sensor->subdev, client, &mt9m032_ops);
sensor->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
chip_version = mt9m032_read(client, MT9M032_CHIP_VERSION);
if (chip_version != MT9M032_CHIP_VERSION_VALUE) {
dev_err(&client->dev, "MT9M032 not detected, wrong version "
"0x%04x\n", chip_version);
ret = -ENODEV;
goto error_sensor;
}
dev_info(&client->dev, "MT9M032 detected at address 0x%02x\n",
client->addr);
sensor->frame_interval.numerator = 1;
sensor->frame_interval.denominator = 30;
sensor->crop.left = MT9M032_COLUMN_START_DEF;
sensor->crop.top = MT9M032_ROW_START_DEF;
sensor->crop.width = MT9M032_COLUMN_SIZE_DEF;
sensor->crop.height = MT9M032_ROW_SIZE_DEF;
sensor->format.width = sensor->crop.width;
sensor->format.height = sensor->crop.height;
sensor->format.code = MEDIA_BUS_FMT_Y8_1X8;
sensor->format.field = V4L2_FIELD_NONE;
sensor->format.colorspace = V4L2_COLORSPACE_SRGB;
v4l2_ctrl_handler_init(&sensor->ctrls, 5);
v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops,
V4L2_CID_GAIN, 0, 127, 1, 64);
sensor->hflip = v4l2_ctrl_new_std(&sensor->ctrls,
&mt9m032_ctrl_ops,
V4L2_CID_HFLIP, 0, 1, 1, 0);
sensor->vflip = v4l2_ctrl_new_std(&sensor->ctrls,
&mt9m032_ctrl_ops,
V4L2_CID_VFLIP, 0, 1, 1, 0);
v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops,
V4L2_CID_EXPOSURE, MT9M032_SHUTTER_WIDTH_MIN,
MT9M032_SHUTTER_WIDTH_MAX, 1,
MT9M032_SHUTTER_WIDTH_DEF);
v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops,
V4L2_CID_PIXEL_RATE, pdata->pix_clock,
pdata->pix_clock, 1, pdata->pix_clock);
if (sensor->ctrls.error) {
ret = sensor->ctrls.error;
dev_err(&client->dev, "control initialization error %d\n", ret);
goto error_ctrl;
}
v4l2_ctrl_cluster(2, &sensor->hflip);
sensor->subdev.ctrl_handler = &sensor->ctrls;
sensor->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR;
sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
ret = media_entity_pads_init(&sensor->subdev.entity, 1, &sensor->pad);
if (ret < 0)
goto error_ctrl;
ret = mt9m032_write(client, MT9M032_RESET, 1); /* reset on */
if (ret < 0)
goto error_entity;
ret = mt9m032_write(client, MT9M032_RESET, 0); /* reset off */
if (ret < 0)
goto error_entity;
ret = mt9m032_setup_pll(sensor);
if (ret < 0)
goto error_entity;
usleep_range(10000, 11000);
ret = v4l2_ctrl_handler_setup(&sensor->ctrls);
if (ret < 0)
goto error_entity;
/* SIZE */
ret = mt9m032_update_geom_timing(sensor);
if (ret < 0)
goto error_entity;
ret = mt9m032_write(client, 0x41, 0x0000); /* reserved !!! */
if (ret < 0)
goto error_entity;
ret = mt9m032_write(client, 0x42, 0x0003); /* reserved !!! */
if (ret < 0)
goto error_entity;
ret = mt9m032_write(client, 0x43, 0x0003); /* reserved !!! */
if (ret < 0)
goto error_entity;
ret = mt9m032_write(client, 0x7f, 0x0000); /* reserved !!! */
if (ret < 0)
goto error_entity;
if (sensor->pdata->invert_pixclock) {
ret = mt9m032_write(client, MT9M032_PIX_CLK_CTRL,
MT9M032_PIX_CLK_CTRL_INV_PIXCLK);
if (ret < 0)
goto error_entity;
}
ret = mt9m032_write(client, MT9M032_RESTART, 1); /* Restart on */
if (ret < 0)
goto error_entity;
msleep(100);
ret = mt9m032_write(client, MT9M032_RESTART, 0); /* Restart off */
if (ret < 0)
goto error_entity;
msleep(100);
ret = update_formatter2(sensor, false);
if (ret < 0)
goto error_entity;
return ret;
error_entity:
media_entity_cleanup(&sensor->subdev.entity);
error_ctrl:
v4l2_ctrl_handler_free(&sensor->ctrls);
error_sensor:
mutex_destroy(&sensor->lock);
return ret;
}
static int mt9m032_remove(struct i2c_client *client)
{
struct v4l2_subdev *subdev = i2c_get_clientdata(client);
struct mt9m032 *sensor = to_mt9m032(subdev);
v4l2_device_unregister_subdev(subdev);
v4l2_ctrl_handler_free(&sensor->ctrls);
media_entity_cleanup(&subdev->entity);
mutex_destroy(&sensor->lock);
return 0;
}
static const struct i2c_device_id mt9m032_id_table[] = {
{ MT9M032_NAME, 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, mt9m032_id_table);
static struct i2c_driver mt9m032_i2c_driver = {
.driver = {
.name = MT9M032_NAME,
},
.probe = mt9m032_probe,
.remove = mt9m032_remove,
.id_table = mt9m032_id_table,
};
module_i2c_driver(mt9m032_i2c_driver);
MODULE_AUTHOR("Martin Hostettler <martin@neutronstar.dyndns.org>");
MODULE_DESCRIPTION("MT9M032 camera sensor driver");
MODULE_LICENSE("GPL v2");
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