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linux/drivers/media/i2c/ov7740.c
Krzysztof Kozlowski fc7586e7c8 media: i2c: ov7740: simplify getting state container 
The pointer to 'struct v4l2_subdev' is stored in drvdata via
v4l2_i2c_subdev_init() so there is no point of a dance like:

    struct i2c_client *client = to_i2c_client(struct device *dev)
    struct v4l2_subdev *sd = i2c_get_clientdata(client);

This allows to remove local variable 'client' and few pointer
dereferences.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-11-16 10:31:12 +01:00

1226 lines
28 KiB
C
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// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2017 Microchip Corporation.
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-event.h>
#include <media/v4l2-image-sizes.h>
#include <media/v4l2-subdev.h>
#define REG_OUTSIZE_LSB 0x34
/* OV7740 register tables */
#define REG_GAIN 0x00 /* Gain lower 8 bits (rest in vref) */
#define REG_BGAIN 0x01 /* blue gain */
#define REG_RGAIN 0x02 /* red gain */
#define REG_GGAIN 0x03 /* green gain */
#define REG_REG04 0x04 /* analog setting, don't change*/
#define REG_BAVG 0x05 /* b channel average */
#define REG_GAVG 0x06 /* g channel average */
#define REG_RAVG 0x07 /* r channel average */
#define REG_REG0C 0x0C /* filp enable */
#define REG0C_IMG_FLIP 0x80
#define REG0C_IMG_MIRROR 0x40
#define REG_REG0E 0x0E /* blc line */
#define REG_HAEC 0x0F /* auto exposure cntrl */
#define REG_AEC 0x10 /* auto exposure cntrl */
#define REG_CLK 0x11 /* Clock control */
#define REG_REG55 0x55 /* Clock PLL DIV/PreDiv */
#define REG_REG12 0x12
#define REG_REG13 0x13 /* auto/manual AGC, AEC, Write Balance*/
#define REG13_AEC_EN 0x01
#define REG13_AGC_EN 0x04
#define REG_REG14 0x14
#define REG_CTRL15 0x15
#define REG15_GAIN_MSB 0x03
#define REG_REG16 0x16
#define REG_MIDH 0x1C /* manufacture id byte */
#define REG_MIDL 0x1D /* manufacture id byre */
#define REG_PIDH 0x0A /* Product ID MSB */
#define REG_PIDL 0x0B /* Product ID LSB */
#define REG_84 0x84 /* lots of stuff */
#define REG_REG38 0x38 /* sub-addr */
#define REG_AHSTART 0x17 /* Horiz start high bits */
#define REG_AHSIZE 0x18
#define REG_AVSTART 0x19 /* Vert start high bits */
#define REG_AVSIZE 0x1A
#define REG_PSHFT 0x1b /* Pixel delay after HREF */
#define REG_HOUTSIZE 0x31
#define REG_VOUTSIZE 0x32
#define REG_HVSIZEOFF 0x33
#define REG_REG34 0x34 /* DSP output size H/V LSB*/
#define REG_ISP_CTRL00 0x80
#define ISPCTRL00_AWB_EN 0x10
#define ISPCTRL00_AWB_GAIN_EN 0x04
#define REG_YGAIN 0xE2 /* ygain for contrast control */
#define REG_YBRIGHT 0xE3
#define REG_SGNSET 0xE4
#define SGNSET_YBRIGHT_MASK 0x08
#define REG_USAT 0xDD
#define REG_VSAT 0xDE
struct ov7740 {
struct v4l2_subdev subdev;
#if defined(CONFIG_MEDIA_CONTROLLER)
struct media_pad pad;
#endif
struct v4l2_mbus_framefmt format;
const struct ov7740_pixfmt *fmt; /* Current format */
const struct ov7740_framesize *frmsize;
struct regmap *regmap;
struct clk *xvclk;
struct v4l2_ctrl_handler ctrl_handler;
struct {
/* gain cluster */
struct v4l2_ctrl *auto_gain;
struct v4l2_ctrl *gain;
};
struct {
struct v4l2_ctrl *auto_wb;
struct v4l2_ctrl *blue_balance;
struct v4l2_ctrl *red_balance;
};
struct {
struct v4l2_ctrl *hflip;
struct v4l2_ctrl *vflip;
};
struct {
/* exposure cluster */
struct v4l2_ctrl *auto_exposure;
struct v4l2_ctrl *exposure;
};
struct {
/* saturation/hue cluster */
struct v4l2_ctrl *saturation;
struct v4l2_ctrl *hue;
};
struct v4l2_ctrl *brightness;
struct v4l2_ctrl *contrast;
struct mutex mutex; /* To serialize asynchronus callbacks */
bool streaming; /* Streaming on/off */
struct gpio_desc *resetb_gpio;
struct gpio_desc *pwdn_gpio;
};
struct ov7740_pixfmt {
u32 mbus_code;
enum v4l2_colorspace colorspace;
const struct reg_sequence *regs;
u32 reg_num;
};
struct ov7740_framesize {
u16 width;
u16 height;
const struct reg_sequence *regs;
u32 reg_num;
};
static const struct reg_sequence ov7740_vga[] = {
{0x55, 0x40},
{0x11, 0x02},
{0xd5, 0x10},
{0x0c, 0x12},
{0x0d, 0x34},
{0x17, 0x25},
{0x18, 0xa0},
{0x19, 0x03},
{0x1a, 0xf0},
{0x1b, 0x89},
{0x22, 0x03},
{0x29, 0x18},
{0x2b, 0xf8},
{0x2c, 0x01},
{REG_HOUTSIZE, 0xa0},
{REG_VOUTSIZE, 0xf0},
{0x33, 0xc4},
{REG_OUTSIZE_LSB, 0x0},
{0x35, 0x05},
{0x04, 0x60},
{0x27, 0x80},
{0x3d, 0x0f},
{0x3e, 0x80},
{0x3f, 0x40},
{0x40, 0x7f},
{0x41, 0x6a},
{0x42, 0x29},
{0x44, 0x22},
{0x45, 0x41},
{0x47, 0x02},
{0x49, 0x64},
{0x4a, 0xa1},
{0x4b, 0x40},
{0x4c, 0x1a},
{0x4d, 0x50},
{0x4e, 0x13},
{0x64, 0x00},
{0x67, 0x88},
{0x68, 0x1a},
{0x14, 0x28},
{0x24, 0x3c},
{0x25, 0x30},
{0x26, 0x72},
{0x50, 0x97},
{0x51, 0x1f},
{0x52, 0x00},
{0x53, 0x00},
{0x20, 0x00},
{0x21, 0xcf},
{0x50, 0x4b},
{0x38, 0x14},
{0xe9, 0x00},
{0x56, 0x55},
{0x57, 0xff},
{0x58, 0xff},
{0x59, 0xff},
{0x5f, 0x04},
{0xec, 0x00},
{0x13, 0xff},
{0x81, 0x3f},
{0x82, 0x32},
{0x38, 0x11},
{0x84, 0x70},
{0x85, 0x00},
{0x86, 0x03},
{0x87, 0x01},
{0x88, 0x05},
{0x89, 0x30},
{0x8d, 0x30},
{0x8f, 0x85},
{0x93, 0x30},
{0x95, 0x85},
{0x99, 0x30},
{0x9b, 0x85},
{0x9c, 0x08},
{0x9d, 0x12},
{0x9e, 0x23},
{0x9f, 0x45},
{0xa0, 0x55},
{0xa1, 0x64},
{0xa2, 0x72},
{0xa3, 0x7f},
{0xa4, 0x8b},
{0xa5, 0x95},
{0xa6, 0xa7},
{0xa7, 0xb5},
{0xa8, 0xcb},
{0xa9, 0xdd},
{0xaa, 0xec},
{0xab, 0x1a},
{0xce, 0x78},
{0xcf, 0x6e},
{0xd0, 0x0a},
{0xd1, 0x0c},
{0xd2, 0x84},
{0xd3, 0x90},
{0xd4, 0x1e},
{0x5a, 0x24},
{0x5b, 0x1f},
{0x5c, 0x88},
{0x5d, 0x60},
{0xac, 0x6e},
{0xbe, 0xff},
{0xbf, 0x00},
{0x0f, 0x1d},
{0x0f, 0x1f},
};
static const struct ov7740_framesize ov7740_framesizes[] = {
{
.width = VGA_WIDTH,
.height = VGA_HEIGHT,
.regs = ov7740_vga,
.reg_num = ARRAY_SIZE(ov7740_vga),
},
};
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int ov7740_get_register(struct v4l2_subdev *sd,
struct v4l2_dbg_register *reg)
{
struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
struct regmap *regmap = ov7740->regmap;
unsigned int val = 0;
int ret;
ret = regmap_read(regmap, reg->reg & 0xff, &val);
reg->val = val;
reg->size = 1;
return ret;
}
static int ov7740_set_register(struct v4l2_subdev *sd,
const struct v4l2_dbg_register *reg)
{
struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
struct regmap *regmap = ov7740->regmap;
regmap_write(regmap, reg->reg & 0xff, reg->val & 0xff);
return 0;
}
#endif
static int ov7740_set_power(struct ov7740 *ov7740, int on)
{
int ret;
if (on) {
ret = clk_prepare_enable(ov7740->xvclk);
if (ret)
return ret;
if (ov7740->pwdn_gpio)
gpiod_direction_output(ov7740->pwdn_gpio, 0);
if (ov7740->resetb_gpio) {
gpiod_set_value(ov7740->resetb_gpio, 1);
usleep_range(500, 1000);
gpiod_set_value(ov7740->resetb_gpio, 0);
usleep_range(3000, 5000);
}
} else {
clk_disable_unprepare(ov7740->xvclk);
if (ov7740->pwdn_gpio)
gpiod_direction_output(ov7740->pwdn_gpio, 0);
}
return 0;
}
static const struct v4l2_subdev_core_ops ov7740_subdev_core_ops = {
.log_status = v4l2_ctrl_subdev_log_status,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = ov7740_get_register,
.s_register = ov7740_set_register,
#endif
.subscribe_event = v4l2_ctrl_subdev_subscribe_event,
.unsubscribe_event = v4l2_event_subdev_unsubscribe,
};
static int ov7740_set_white_balance(struct ov7740 *ov7740, int awb)
{
struct regmap *regmap = ov7740->regmap;
unsigned int value;
int ret;
ret = regmap_read(regmap, REG_ISP_CTRL00, &value);
if (!ret) {
if (awb)
value |= (ISPCTRL00_AWB_EN | ISPCTRL00_AWB_GAIN_EN);
else
value &= ~(ISPCTRL00_AWB_EN | ISPCTRL00_AWB_GAIN_EN);
ret = regmap_write(regmap, REG_ISP_CTRL00, value);
if (ret)
return ret;
}
if (!awb) {
ret = regmap_write(regmap, REG_BGAIN,
ov7740->blue_balance->val);
if (ret)
return ret;
ret = regmap_write(regmap, REG_RGAIN, ov7740->red_balance->val);
if (ret)
return ret;
}
return 0;
}
static int ov7740_set_saturation(struct regmap *regmap, int value)
{
int ret;
ret = regmap_write(regmap, REG_USAT, (unsigned char)value);
if (ret)
return ret;
return regmap_write(regmap, REG_VSAT, (unsigned char)value);
}
static int ov7740_set_gain(struct regmap *regmap, int value)
{
int ret;
ret = regmap_write(regmap, REG_GAIN, value & 0xff);
if (ret)
return ret;
ret = regmap_update_bits(regmap, REG_CTRL15,
REG15_GAIN_MSB, (value >> 8) & 0x3);
if (!ret)
ret = regmap_update_bits(regmap, REG_REG13, REG13_AGC_EN, 0);
return ret;
}
static int ov7740_set_autogain(struct regmap *regmap, int value)
{
unsigned int reg;
int ret;
ret = regmap_read(regmap, REG_REG13, &reg);
if (ret)
return ret;
if (value)
reg |= REG13_AGC_EN;
else
reg &= ~REG13_AGC_EN;
return regmap_write(regmap, REG_REG13, reg);
}
static int ov7740_set_brightness(struct regmap *regmap, int value)
{
/* Turn off AEC/AGC */
regmap_update_bits(regmap, REG_REG13, REG13_AEC_EN, 0);
regmap_update_bits(regmap, REG_REG13, REG13_AGC_EN, 0);
if (value >= 0) {
regmap_write(regmap, REG_YBRIGHT, (unsigned char)value);
regmap_update_bits(regmap, REG_SGNSET, SGNSET_YBRIGHT_MASK, 0);
} else{
regmap_write(regmap, REG_YBRIGHT, (unsigned char)(-value));
regmap_update_bits(regmap, REG_SGNSET, SGNSET_YBRIGHT_MASK, 1);
}
return 0;
}
static int ov7740_set_contrast(struct regmap *regmap, int value)
{
return regmap_write(regmap, REG_YGAIN, (unsigned char)value);
}
static int ov7740_get_gain(struct ov7740 *ov7740, struct v4l2_ctrl *ctrl)
{
struct regmap *regmap = ov7740->regmap;
unsigned int value0, value1;
int ret;
if (!ctrl->val)
return 0;
ret = regmap_read(regmap, REG_GAIN, &value0);
if (ret)
return ret;
ret = regmap_read(regmap, REG_CTRL15, &value1);
if (ret)
return ret;
ov7740->gain->val = (value1 << 8) | (value0 & 0xff);
return 0;
}
static int ov7740_get_exp(struct ov7740 *ov7740, struct v4l2_ctrl *ctrl)
{
struct regmap *regmap = ov7740->regmap;
unsigned int value0, value1;
int ret;
if (ctrl->val == V4L2_EXPOSURE_MANUAL)
return 0;
ret = regmap_read(regmap, REG_AEC, &value0);
if (ret)
return ret;
ret = regmap_read(regmap, REG_HAEC, &value1);
if (ret)
return ret;
ov7740->exposure->val = (value1 << 8) | (value0 & 0xff);
return 0;
}
static int ov7740_set_exp(struct regmap *regmap, int value)
{
int ret;
/* Turn off AEC/AGC */
ret = regmap_update_bits(regmap, REG_REG13,
REG13_AEC_EN | REG13_AGC_EN, 0);
if (ret)
return ret;
ret = regmap_write(regmap, REG_AEC, (unsigned char)value);
if (ret)
return ret;
return regmap_write(regmap, REG_HAEC, (unsigned char)(value >> 8));
}
static int ov7740_set_autoexp(struct regmap *regmap,
enum v4l2_exposure_auto_type value)
{
unsigned int reg;
int ret;
ret = regmap_read(regmap, REG_REG13, &reg);
if (!ret) {
if (value == V4L2_EXPOSURE_AUTO)
reg |= (REG13_AEC_EN | REG13_AGC_EN);
else
reg &= ~(REG13_AEC_EN | REG13_AGC_EN);
ret = regmap_write(regmap, REG_REG13, reg);
}
return ret;
}
static int ov7740_get_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov7740 *ov7740 = container_of(ctrl->handler,
struct ov7740, ctrl_handler);
int ret;
switch (ctrl->id) {
case V4L2_CID_AUTOGAIN:
ret = ov7740_get_gain(ov7740, ctrl);
break;
case V4L2_CID_EXPOSURE_AUTO:
ret = ov7740_get_exp(ov7740, ctrl);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int ov7740_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov7740 *ov7740 = container_of(ctrl->handler,
struct ov7740, ctrl_handler);
struct i2c_client *client = v4l2_get_subdevdata(&ov7740->subdev);
struct regmap *regmap = ov7740->regmap;
int ret;
u8 val;
if (!pm_runtime_get_if_in_use(&client->dev))
return 0;
switch (ctrl->id) {
case V4L2_CID_AUTO_WHITE_BALANCE:
ret = ov7740_set_white_balance(ov7740, ctrl->val);
break;
case V4L2_CID_SATURATION:
ret = ov7740_set_saturation(regmap, ctrl->val);
break;
case V4L2_CID_BRIGHTNESS:
ret = ov7740_set_brightness(regmap, ctrl->val);
break;
case V4L2_CID_CONTRAST:
ret = ov7740_set_contrast(regmap, ctrl->val);
break;
case V4L2_CID_VFLIP:
val = ctrl->val ? REG0C_IMG_FLIP : 0x00;
ret = regmap_update_bits(regmap, REG_REG0C,
REG0C_IMG_FLIP, val);
break;
case V4L2_CID_HFLIP:
val = ctrl->val ? REG0C_IMG_MIRROR : 0x00;
ret = regmap_update_bits(regmap, REG_REG0C,
REG0C_IMG_MIRROR, val);
break;
case V4L2_CID_AUTOGAIN:
if (!ctrl->val)
ret = ov7740_set_gain(regmap, ov7740->gain->val);
else
ret = ov7740_set_autogain(regmap, ctrl->val);
break;
case V4L2_CID_EXPOSURE_AUTO:
if (ctrl->val == V4L2_EXPOSURE_MANUAL)
ret = ov7740_set_exp(regmap, ov7740->exposure->val);
else
ret = ov7740_set_autoexp(regmap, ctrl->val);
break;
default:
ret = -EINVAL;
break;
}
pm_runtime_put(&client->dev);
return ret;
}
static const struct v4l2_ctrl_ops ov7740_ctrl_ops = {
.g_volatile_ctrl = ov7740_get_volatile_ctrl,
.s_ctrl = ov7740_set_ctrl,
};
static int ov7740_start_streaming(struct ov7740 *ov7740)
{
int ret;
if (ov7740->fmt) {
ret = regmap_multi_reg_write(ov7740->regmap,
ov7740->fmt->regs,
ov7740->fmt->reg_num);
if (ret)
return ret;
}
if (ov7740->frmsize) {
ret = regmap_multi_reg_write(ov7740->regmap,
ov7740->frmsize->regs,
ov7740->frmsize->reg_num);
if (ret)
return ret;
}
return __v4l2_ctrl_handler_setup(ov7740->subdev.ctrl_handler);
}
static int ov7740_set_stream(struct v4l2_subdev *sd, int enable)
{
struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret = 0;
mutex_lock(&ov7740->mutex);
if (ov7740->streaming == enable) {
mutex_unlock(&ov7740->mutex);
return 0;
}
if (enable) {
ret = pm_runtime_get_sync(&client->dev);
if (ret < 0) {
pm_runtime_put_noidle(&client->dev);
goto err_unlock;
}
ret = ov7740_start_streaming(ov7740);
if (ret)
goto err_rpm_put;
} else {
pm_runtime_put(&client->dev);
}
ov7740->streaming = enable;
mutex_unlock(&ov7740->mutex);
return ret;
err_rpm_put:
pm_runtime_put(&client->dev);
err_unlock:
mutex_unlock(&ov7740->mutex);
return ret;
}
static int ov7740_g_frame_interval(struct v4l2_subdev *sd,
struct v4l2_subdev_frame_interval *ival)
{
struct v4l2_fract *tpf = &ival->interval;
tpf->numerator = 1;
tpf->denominator = 60;
return 0;
}
static int ov7740_s_frame_interval(struct v4l2_subdev *sd,
struct v4l2_subdev_frame_interval *ival)
{
struct v4l2_fract *tpf = &ival->interval;
tpf->numerator = 1;
tpf->denominator = 60;
return 0;
}
static const struct v4l2_subdev_video_ops ov7740_subdev_video_ops = {
.s_stream = ov7740_set_stream,
.s_frame_interval = ov7740_s_frame_interval,
.g_frame_interval = ov7740_g_frame_interval,
};
static const struct reg_sequence ov7740_format_yuyv[] = {
{0x12, 0x00},
{0x36, 0x3f},
{0x80, 0x7f},
{0x83, 0x01},
};
static const struct reg_sequence ov7740_format_bggr8[] = {
{0x36, 0x2f},
{0x80, 0x01},
{0x83, 0x04},
};
static const struct ov7740_pixfmt ov7740_formats[] = {
{
.mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
.colorspace = V4L2_COLORSPACE_SRGB,
.regs = ov7740_format_yuyv,
.reg_num = ARRAY_SIZE(ov7740_format_yuyv),
},
{
.mbus_code = MEDIA_BUS_FMT_SBGGR8_1X8,
.colorspace = V4L2_COLORSPACE_SRGB,
.regs = ov7740_format_bggr8,
.reg_num = ARRAY_SIZE(ov7740_format_bggr8),
}
};
#define N_OV7740_FMTS ARRAY_SIZE(ov7740_formats)
static int ov7740_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_mbus_code_enum *code)
{
if (code->pad || code->index >= N_OV7740_FMTS)
return -EINVAL;
code->code = ov7740_formats[code->index].mbus_code;
return 0;
}
static int ov7740_enum_frame_interval(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_frame_interval_enum *fie)
{
if (fie->pad)
return -EINVAL;
if (fie->index >= 1)
return -EINVAL;
if ((fie->width != VGA_WIDTH) || (fie->height != VGA_HEIGHT))
return -EINVAL;
fie->interval.numerator = 1;
fie->interval.denominator = 60;
return 0;
}
static int ov7740_enum_frame_size(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_frame_size_enum *fse)
{
if (fse->pad)
return -EINVAL;
if (fse->index > 0)
return -EINVAL;
fse->min_width = fse->max_width = VGA_WIDTH;
fse->min_height = fse->max_height = VGA_HEIGHT;
return 0;
}
static int ov7740_try_fmt_internal(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *fmt,
const struct ov7740_pixfmt **ret_fmt,
const struct ov7740_framesize **ret_frmsize)
{
struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
const struct ov7740_framesize *fsize = &ov7740_framesizes[0];
int index, i;
for (index = 0; index < N_OV7740_FMTS; index++) {
if (ov7740_formats[index].mbus_code == fmt->code)
break;
}
if (index >= N_OV7740_FMTS) {
/* default to first format */
index = 0;
fmt->code = ov7740_formats[0].mbus_code;
}
if (ret_fmt != NULL)
*ret_fmt = ov7740_formats + index;
for (i = 0; i < ARRAY_SIZE(ov7740_framesizes); i++) {
if ((fsize->width >= fmt->width) &&
(fsize->height >= fmt->height)) {
fmt->width = fsize->width;
fmt->height = fsize->height;
break;
}
fsize++;
}
if (i >= ARRAY_SIZE(ov7740_framesizes)) {
fsize = &ov7740_framesizes[0];
fmt->width = fsize->width;
fmt->height = fsize->height;
}
if (ret_frmsize != NULL)
*ret_frmsize = fsize;
fmt->field = V4L2_FIELD_NONE;
fmt->colorspace = ov7740_formats[index].colorspace;
ov7740->format = *fmt;
return 0;
}
static int ov7740_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *format)
{
struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
const struct ov7740_pixfmt *ovfmt;
const struct ov7740_framesize *fsize;
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
struct v4l2_mbus_framefmt *mbus_fmt;
#endif
int ret;
mutex_lock(&ov7740->mutex);
if (format->pad) {
ret = -EINVAL;
goto error;
}
if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
ret = ov7740_try_fmt_internal(sd, &format->format, NULL, NULL);
if (ret)
goto error;
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
mbus_fmt = v4l2_subdev_get_try_format(sd, cfg, format->pad);
*mbus_fmt = format->format;
#endif
mutex_unlock(&ov7740->mutex);
return 0;
}
ret = ov7740_try_fmt_internal(sd, &format->format, &ovfmt, &fsize);
if (ret)
goto error;
ov7740->fmt = ovfmt;
ov7740->frmsize = fsize;
mutex_unlock(&ov7740->mutex);
return 0;
error:
mutex_unlock(&ov7740->mutex);
return ret;
}
static int ov7740_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *format)
{
struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
struct v4l2_mbus_framefmt *mbus_fmt;
#endif
int ret = 0;
mutex_lock(&ov7740->mutex);
if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
mbus_fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
format->format = *mbus_fmt;
ret = 0;
#else
ret = -EINVAL;
#endif
} else {
format->format = ov7740->format;
}
mutex_unlock(&ov7740->mutex);
return ret;
}
static const struct v4l2_subdev_pad_ops ov7740_subdev_pad_ops = {
.enum_frame_interval = ov7740_enum_frame_interval,
.enum_frame_size = ov7740_enum_frame_size,
.enum_mbus_code = ov7740_enum_mbus_code,
.get_fmt = ov7740_get_fmt,
.set_fmt = ov7740_set_fmt,
};
static const struct v4l2_subdev_ops ov7740_subdev_ops = {
.core = &ov7740_subdev_core_ops,
.video = &ov7740_subdev_video_ops,
.pad = &ov7740_subdev_pad_ops,
};
static void ov7740_get_default_format(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *format)
{
struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
format->width = ov7740->frmsize->width;
format->height = ov7740->frmsize->height;
format->colorspace = ov7740->fmt->colorspace;
format->code = ov7740->fmt->mbus_code;
format->field = V4L2_FIELD_NONE;
}
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
static int ov7740_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
struct v4l2_mbus_framefmt *format =
v4l2_subdev_get_try_format(sd, fh->pad, 0);
mutex_lock(&ov7740->mutex);
ov7740_get_default_format(sd, format);
mutex_unlock(&ov7740->mutex);
return 0;
}
static const struct v4l2_subdev_internal_ops ov7740_subdev_internal_ops = {
.open = ov7740_open,
};
#endif
static int ov7740_probe_dt(struct i2c_client *client,
struct ov7740 *ov7740)
{
ov7740->resetb_gpio = devm_gpiod_get_optional(&client->dev, "reset",
GPIOD_OUT_HIGH);
if (IS_ERR(ov7740->resetb_gpio)) {
dev_info(&client->dev, "can't get %s GPIO\n", "reset");
return PTR_ERR(ov7740->resetb_gpio);
}
ov7740->pwdn_gpio = devm_gpiod_get_optional(&client->dev, "powerdown",
GPIOD_OUT_LOW);
if (IS_ERR(ov7740->pwdn_gpio)) {
dev_info(&client->dev, "can't get %s GPIO\n", "powerdown");
return PTR_ERR(ov7740->pwdn_gpio);
}
return 0;
}
static int ov7740_detect(struct ov7740 *ov7740)
{
struct regmap *regmap = ov7740->regmap;
unsigned int midh, midl, pidh, pidl;
int ret;
ret = regmap_read(regmap, REG_MIDH, &midh);
if (ret)
return ret;
if (midh != 0x7f)
return -ENODEV;
ret = regmap_read(regmap, REG_MIDL, &midl);
if (ret)
return ret;
if (midl != 0xa2)
return -ENODEV;
ret = regmap_read(regmap, REG_PIDH, &pidh);
if (ret)
return ret;
if (pidh != 0x77)
return -ENODEV;
ret = regmap_read(regmap, REG_PIDL, &pidl);
if (ret)
return ret;
if ((pidl != 0x40) && (pidl != 0x41) && (pidl != 0x42))
return -ENODEV;
return 0;
}
static int ov7740_init_controls(struct ov7740 *ov7740)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov7740->subdev);
struct v4l2_ctrl_handler *ctrl_hdlr = &ov7740->ctrl_handler;
int ret;
ret = v4l2_ctrl_handler_init(ctrl_hdlr, 12);
if (ret < 0)
return ret;
ctrl_hdlr->lock = &ov7740->mutex;
ov7740->auto_wb = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
V4L2_CID_AUTO_WHITE_BALANCE,
0, 1, 1, 1);
ov7740->blue_balance = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
V4L2_CID_BLUE_BALANCE,
0, 0xff, 1, 0x80);
ov7740->red_balance = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
V4L2_CID_RED_BALANCE,
0, 0xff, 1, 0x80);
ov7740->brightness = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
V4L2_CID_BRIGHTNESS,
-255, 255, 1, 0);
ov7740->contrast = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
V4L2_CID_CONTRAST,
0, 127, 1, 0x20);
ov7740->saturation = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
V4L2_CID_SATURATION, 0, 256, 1, 0x80);
ov7740->hflip = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
V4L2_CID_HFLIP, 0, 1, 1, 0);
ov7740->vflip = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
V4L2_CID_VFLIP, 0, 1, 1, 0);
ov7740->gain = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
V4L2_CID_GAIN, 0, 1023, 1, 500);
ov7740->auto_gain = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
ov7740->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
V4L2_CID_EXPOSURE, 0, 65535, 1, 500);
ov7740->auto_exposure = v4l2_ctrl_new_std_menu(ctrl_hdlr,
&ov7740_ctrl_ops,
V4L2_CID_EXPOSURE_AUTO,
V4L2_EXPOSURE_MANUAL, 0,
V4L2_EXPOSURE_AUTO);
v4l2_ctrl_auto_cluster(3, &ov7740->auto_wb, 0, false);
v4l2_ctrl_auto_cluster(2, &ov7740->auto_gain, 0, true);
v4l2_ctrl_auto_cluster(2, &ov7740->auto_exposure,
V4L2_EXPOSURE_MANUAL, true);
if (ctrl_hdlr->error) {
ret = ctrl_hdlr->error;
dev_err(&client->dev, "controls initialisation failed (%d)\n",
ret);
goto error;
}
ret = v4l2_ctrl_handler_setup(ctrl_hdlr);
if (ret) {
dev_err(&client->dev, "%s control init failed (%d)\n",
__func__, ret);
goto error;
}
ov7740->subdev.ctrl_handler = ctrl_hdlr;
return 0;
error:
v4l2_ctrl_handler_free(ctrl_hdlr);
mutex_destroy(&ov7740->mutex);
return ret;
}
static void ov7740_free_controls(struct ov7740 *ov7740)
{
v4l2_ctrl_handler_free(ov7740->subdev.ctrl_handler);
mutex_destroy(&ov7740->mutex);
}
#define OV7740_MAX_REGISTER 0xff
static const struct regmap_config ov7740_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = OV7740_MAX_REGISTER,
};
static int ov7740_probe(struct i2c_client *client)
{
struct ov7740 *ov7740;
struct v4l2_subdev *sd;
int ret;
ov7740 = devm_kzalloc(&client->dev, sizeof(*ov7740), GFP_KERNEL);
if (!ov7740)
return -ENOMEM;
ov7740->xvclk = devm_clk_get(&client->dev, "xvclk");
if (IS_ERR(ov7740->xvclk)) {
ret = PTR_ERR(ov7740->xvclk);
dev_err(&client->dev,
"OV7740: fail to get xvclk: %d\n", ret);
return ret;
}
ret = ov7740_probe_dt(client, ov7740);
if (ret)
return ret;
ov7740->regmap = devm_regmap_init_sccb(client, &ov7740_regmap_config);
if (IS_ERR(ov7740->regmap)) {
ret = PTR_ERR(ov7740->regmap);
dev_err(&client->dev, "Failed to allocate register map: %d\n",
ret);
return ret;
}
sd = &ov7740->subdev;
v4l2_i2c_subdev_init(sd, client, &ov7740_subdev_ops);
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
sd->internal_ops = &ov7740_subdev_internal_ops;
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
#endif
#if defined(CONFIG_MEDIA_CONTROLLER)
ov7740->pad.flags = MEDIA_PAD_FL_SOURCE;
sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
ret = media_entity_pads_init(&sd->entity, 1, &ov7740->pad);
if (ret)
return ret;
#endif
ret = ov7740_set_power(ov7740, 1);
if (ret)
return ret;
pm_runtime_set_active(&client->dev);
pm_runtime_enable(&client->dev);
ret = ov7740_detect(ov7740);
if (ret)
goto error_detect;
mutex_init(&ov7740->mutex);
ret = ov7740_init_controls(ov7740);
if (ret)
goto error_init_controls;
v4l_info(client, "chip found @ 0x%02x (%s)\n",
client->addr << 1, client->adapter->name);
ov7740->fmt = &ov7740_formats[0];
ov7740->frmsize = &ov7740_framesizes[0];
ov7740_get_default_format(sd, &ov7740->format);
ret = v4l2_async_register_subdev(sd);
if (ret)
goto error_async_register;
pm_runtime_idle(&client->dev);
return 0;
error_async_register:
v4l2_ctrl_handler_free(ov7740->subdev.ctrl_handler);
error_init_controls:
ov7740_free_controls(ov7740);
error_detect:
pm_runtime_disable(&client->dev);
pm_runtime_set_suspended(&client->dev);
ov7740_set_power(ov7740, 0);
media_entity_cleanup(&ov7740->subdev.entity);
return ret;
}
static int ov7740_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
mutex_destroy(&ov7740->mutex);
v4l2_ctrl_handler_free(ov7740->subdev.ctrl_handler);
media_entity_cleanup(&ov7740->subdev.entity);
v4l2_async_unregister_subdev(sd);
ov7740_free_controls(ov7740);
pm_runtime_get_sync(&client->dev);
pm_runtime_disable(&client->dev);
pm_runtime_set_suspended(&client->dev);
pm_runtime_put_noidle(&client->dev);
ov7740_set_power(ov7740, 0);
return 0;
}
static int __maybe_unused ov7740_runtime_suspend(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
ov7740_set_power(ov7740, 0);
return 0;
}
static int __maybe_unused ov7740_runtime_resume(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
return ov7740_set_power(ov7740, 1);
}
static const struct i2c_device_id ov7740_id[] = {
{ "ov7740", 0 },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(i2c, ov7740_id);
static const struct dev_pm_ops ov7740_pm_ops = {
SET_RUNTIME_PM_OPS(ov7740_runtime_suspend, ov7740_runtime_resume, NULL)
};
static const struct of_device_id ov7740_of_match[] = {
{.compatible = "ovti,ov7740", },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, ov7740_of_match);
static struct i2c_driver ov7740_i2c_driver = {
.driver = {
.name = "ov7740",
.pm = &ov7740_pm_ops,
.of_match_table = of_match_ptr(ov7740_of_match),
},
.probe_new = ov7740_probe,
.remove = ov7740_remove,
.id_table = ov7740_id,
};
module_i2c_driver(ov7740_i2c_driver);
MODULE_DESCRIPTION("The V4L2 driver for Omnivision 7740 sensor");
MODULE_AUTHOR("Songjun Wu <songjun.wu@atmel.com>");
MODULE_LICENSE("GPL v2");
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