// SPDX-License-Identifier: GPL-2.0
/*
* ov7750 driver
*
* Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd.
*
* V0.0X01.0X01 add poweron function.
* V0.0X01.0X02 fix mclk issue when probe multiple camera.
* V0.0X01.0X03 add enum_frame_interval function.
* V0.0X01.0X04 add quick stream on/off
* V0.0X01.0X05 add function g_mbus_config
*/
#include <linux/clk.h>
#include <linux/device.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/regulator/consumer.h>
#include <linux/sysfs.h>
#include <linux/slab.h>
#include <linux/version.h>
#include <linux/rk-camera-module.h>
#include <media/media-entity.h>
#include <media/v4l2-async.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-subdev.h>
#include <linux/pinctrl/consumer.h>
#define DRIVER_VERSION KERNEL_VERSION(0, 0x01, 0x05)
#ifndef V4L2_CID_DIGITAL_GAIN
#define V4L2_CID_DIGITAL_GAIN V4L2_CID_GAIN
#endif
/* 45Mhz * 4 Binning */
#define OV7750_PIXEL_RATE (49 * 1000 * 1000)
#define OV7750_XVCLK_FREQ 24000000
#define CHIP_ID 0x7750
#define OV7750_REG_CHIP_ID 0x300a
#define OV7750_REG_CTRL_MODE 0x0100
#define OV7750_MODE_SW_STANDBY 0x0
#define OV7750_MODE_STREAMING BIT(0)
#define OV7750_REG_EXPOSURE 0x3500
#define OV7750_EXPOSURE_MIN 4
#define OV7750_EXPOSURE_STEP 1
#define OV7750_VTS_MAX 0x7fff
#define OV7750_REG_GAIN_H 0x350a
#define OV7750_REG_GAIN_L 0x350b
#define OV7750_GAIN_H_MASK 0x07
#define OV7750_GAIN_H_SHIFT 8
#define OV7750_GAIN_L_MASK 0xff
#define OV7750_GAIN_MIN 0x10
#define OV7750_GAIN_MAX 0xf8
#define OV7750_GAIN_STEP 1
#define OV7750_GAIN_DEFAULT 0x10
#define OV7750_REG_TEST_PATTERN 0x5e00
#define OV7750_TEST_PATTERN_ENABLE 0x80
#define OV7750_TEST_PATTERN_DISABLE 0x0
#define OV7750_REG_VTS 0x380e
#define REG_NULL 0xFFFF
#define OV7750_REG_VALUE_08BIT 1
#define OV7750_REG_VALUE_16BIT 2
#define OV7750_REG_VALUE_24BIT 3
#define OV7750_BITS_PER_SAMPLE 10
#define OV7750_REG_MANUAL_CTL 0x3503
#define OV7750_CHIP_REVISION_REG 0x3029
#define OV7750_R1F 0x70
#define OV7750_EXP_MARGIN_LIMIT 10
#define OF_CAMERA_PINCTRL_DEFAULT "rockchip,camera_default"
#define OF_CAMERA_PINCTRL_SLEEP "rockchip,camera_sleep"
#define OV7750_NAME "ov7750"
#define OV7750_LANES 1
static const struct regval *ov7750_global_regs;
static const char * const ov7750_supply_names[] = {
"avdd", /* Analog power */
"dovdd", /* Digital I/O power */
"dvdd", /* Digital core power */
};
#define OV7750_NUM_SUPPLIES ARRAY_SIZE(ov7750_supply_names)
struct regval {
u16 addr;
u8 val;
};
struct ov7750_mode {
u32 width;
u32 height;
struct v4l2_fract max_fps;
u32 hts_def;
u32 vts_def;
u32 exp_def;
const struct regval *reg_list;
};
struct ov7750 {
struct i2c_client *client;
struct clk *xvclk;
struct gpio_desc *reset_gpio;
struct gpio_desc *pwdn_gpio;
struct regulator_bulk_data supplies[OV7750_NUM_SUPPLIES];
struct pinctrl *pinctrl;
struct pinctrl_state *pins_default;
struct pinctrl_state *pins_sleep;
struct v4l2_subdev subdev;
struct media_pad pad;
struct v4l2_ctrl_handler ctrl_handler;
struct v4l2_ctrl *exposure;
struct v4l2_ctrl *anal_gain;
struct v4l2_ctrl *digi_gain;
struct v4l2_ctrl *hblank;
struct v4l2_ctrl *vblank;
struct v4l2_ctrl *test_pattern;
struct mutex mutex;
bool streaming;
bool power_on;
const struct ov7750_mode *cur_mode;
u32 module_index;
const char *module_facing;
const char *module_name;
const char *len_name;
};
#define to_ov7750(sd) container_of(sd, struct ov7750, subdev)
/*
* Rev: 1F
* Xclk 24Mhz
*/
static const struct regval ov7750_global_regs_r1f[] = {
{0x0103, 0x01},
{0x0100, 0x00},
{0x3005, 0x00},
{0x3012, 0xc0},
{0x3013, 0xd2},
{0x3014, 0x04},
{0x3016, 0x10},
{0x3017, 0x00},
{0x3018, 0x00},
{0x301a, 0x00},
{0x301b, 0x00},
{0x301c, 0x00},
{0x3023, 0x05},
{0x3037, 0xf0},
{0x3098, 0x04},
{0x3099, 0x28},
{0x309a, 0x05},
{0x309b, 0x04},
{0x30b0, 0x0a},
{0x30b1, 0x01},
{0x30b3, 0x64},
{0x30b4, 0x03},
{0x30b5, 0x05},
{0x3106, 0xda},
{0x3500, 0x00},
{0x3501, 0x1f},
{0x3502, 0x80},
{0x3503, 0x07},
{0x3509, 0x10},
{0x350b, 0x10},
{0x3600, 0x1c},
{0x3602, 0x62},
{0x3620, 0xb7},
{0x3622, 0x04},
{0x3626, 0x21},
{0x3627, 0x30},
{0x3630, 0x44},
{0x3631, 0x35},
{0x3634, 0x60},
{0x3636, 0x00},
{0x3662, 0x01},
{0x3663, 0x70},
{0x3664, 0xf0},
{0x3666, 0x0a},
{0x3669, 0x1a},
{0x366a, 0x00},
{0x366b, 0x50},
{0x3673, 0x01},
{0x3674, 0xff},
{0x3675, 0x03},
{0x3705, 0xc1},
{0x3709, 0x40},
{0x373c, 0x08},
{0x3742, 0x00},
{0x3757, 0xb3},
{0x3788, 0x00},
{0x37a8, 0x01},
{0x37a9, 0xc0},
{0x3800, 0x00},
{0x3801, 0x04},
{0x3802, 0x00},
{0x3803, 0x04},
{0x3804, 0x02},
{0x3805, 0x8b},
{0x3806, 0x01},
{0x3807, 0xeb},
{0x3808, 0x02},
{0x3809, 0x80},
{0x380a, 0x01},
{0x380b, 0xe0},
/* line length_pclk */
{0x380c, 0x03}, //{0x380c, 0x03},
{0x380d, 0xa0}, //{0x380d, 0x10},
/* frame_length_line */
{0x380e, 0x07}, //{0x380e, 0x02},
{0x380f, 0xd0}, //{0x380f, 0x00},
{0x3810, 0x00},
{0x3811, 0x04},
{0x3812, 0x00},
{0x3813, 0x05},
{0x3814, 0x11},
{0x3815, 0x11},
{0x3820, 0x40},
{0x3821, 0x00},
{0x382f, 0x0e},
{0x3832, 0x00},
{0x3833, 0x05},
{0x3834, 0x00},
{0x3835, 0x0c},
{0x3837, 0x00},
{0x3b80, 0x00},
{0x3b81, 0xa5},
{0x3b82, 0x10},
{0x3b83, 0x00},
{0x3b84, 0x08},
{0x3b85, 0x00},
{0x3b86, 0x01},
{0x3b87, 0x00},
{0x3b88, 0x00},
{0x3b89, 0x00},
{0x3b8a, 0x00},
{0x3b8b, 0x05},
{0x3b8c, 0x00},
{0x3b8d, 0x00},
{0x3b8e, 0x00},
{0x3b8f, 0x1a},
{0x3b94, 0x05},
{0x3b95, 0xf2},
{0x3b96, 0x40},
{0x3c00, 0x89},
{0x3c01, 0x63},
{0x3c02, 0x01},
{0x3c03, 0x00},
{0x3c04, 0x00},
{0x3c05, 0x03},
{0x3c06, 0x00},
{0x3c07, 0x06},
{0x3c0c, 0x01},
{0x3c0d, 0xd0},
{0x3c0e, 0x02},
{0x3c0f, 0x04},
{0x4001, 0x42},
{0x4004, 0x04},
{0x4005, 0x00},
{0x404e, 0x01},
{0x4241, 0x00},
{0x4242, 0x00},
{0x4300, 0xff},
{0x4301, 0x00},
{0x4501, 0x48},
{0x4600, 0x00},
{0x4601, 0x4e},
{0x4801, 0x0f},
{0x4806, 0x0f},
{0x4819, 0xaa},
{0x4823, 0x3e},
{0x4837, 0x19},
{0x4a0d, 0x00},
{0x4a47, 0x7f},
{0x4a49, 0xf0},
{0x4a4b, 0x30},
{0x5000, 0x85},
{0x5001, 0x80},
{REG_NULL, 0x00}
};
/*
* Rev: xx
* Xclk 24Mhz
*/
static const struct regval ov7750_global_regs_rxx[] = {
{REG_NULL, 0x00}
};
/*
* Xclk 24Mhz
* max_framerate 60fps
* mipi_datarate per lane 400Mbps
*/
static const struct regval ov7750_640x480_regs[] = {
{0x3500, 0x00},
{0x3501, 0x1f},
{0x3502, 0x80},
{0x3503, 0x07},
{0x3509, 0x10},
{0x350b, 0x10},
{0x3600, 0x1c},
{0x3602, 0x62},
{0x3620, 0xb7},
{0x3622, 0x04},
{0x3626, 0x21},
{0x3627, 0x30},
{0x3630, 0x44},
{0x3631, 0x35},
{0x3634, 0x60},
{0x3636, 0x00},
{0x3662, 0x01},
{0x3663, 0x70},
{0x3664, 0xf0},
{0x3666, 0x0a},
{0x3669, 0x1a},
{0x366a, 0x00},
{0x366b, 0x50},
{0x3673, 0x01},
{0x3674, 0xff},
{0x3675, 0x03},
{0x3705, 0xc1},
{0x3709, 0x40},
{0x373c, 0x08},
{0x3742, 0x00},
{0x3757, 0xb3},
{0x3788, 0x00},
{0x37a8, 0x01},
{0x37a9, 0xc0},
/* vga */
{0x3800, 0x00},
{0x3801, 0x04},
{0x3802, 0x00},
{0x3803, 0x04},
{0x3804, 0x02},
{0x3805, 0x8b},
{0x3806, 0x01},
{0x3807, 0xeb},
/* vaga end */
{0x3808, 0x02},
{0x3809, 0x80},
{0x380a, 0x01},
{0x380b, 0xe0},
{0x380c, 0x03},
{0x380d, 0xa0},
{0x380e, 0x07},
{0x380f, 0xd0},
{0x3810, 0x00},
{0x3811, 0x04},
{0x3812, 0x00},
{0x3813, 0x05},
{0x3814, 0x11},
{0x3815, 0x11},
{0x3820, 0x40},
{0x3821, 0x00},
{0x382f, 0x0e},
{0x3832, 0x00},
{0x3833, 0x05},
{0x3834, 0x00},
{0x3835, 0x0c},
{0x3837, 0x00},
{REG_NULL, 0x00}
};
static const struct ov7750_mode supported_modes[] = {
{
.width = 640,
.height = 480,
.max_fps = {
.numerator = 10000,
.denominator = 600000,
},
.exp_def = 0x0200,
.hts_def = 0x03a0,
.vts_def = 0x07d0,
.reg_list = ov7750_640x480_regs,
},
};
#define OV7750_LINK_FREQ_400MHZ 400000000
static const s64 link_freq_menu_items[] = {
OV7750_LINK_FREQ_400MHZ
};
static const char * const ov7750_test_pattern_menu[] = {
"Disabled",
"Vertical Color Bar Type 1",
"Vertical Color Bar Type 2",
"Vertical Color Bar Type 3",
"Vertical Color Bar Type 4"
};
/* Write registers up to 4 at a time */
static int ov7750_write_reg(struct i2c_client *client, u16 reg,
int len, u32 val)
{
u32 buf_i, val_i;
u8 buf[6];
u8 *val_p;
__be32 val_be;
if (len > 4)
return -EINVAL;
buf[0] = reg >> 8;
buf[1] = reg & 0xff;
val_be = cpu_to_be32(val);
val_p = (u8 *)&val_be;
buf_i = 2;
val_i = 4 - len;
while (val_i < 4)
buf[buf_i++] = val_p[val_i++];
if (i2c_master_send(client, buf, len + 2) != len + 2)
return -EIO;
return 0;
}
static int ov7750_write_array(struct i2c_client *client,
const struct regval *regs)
{
u32 i;
int ret = 0;
for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++)
ret = ov7750_write_reg(client, regs[i].addr,
OV7750_REG_VALUE_08BIT,
regs[i].val);
return ret;
}
/* Read registers up to 4 at a time */
static int ov7750_read_reg(struct i2c_client *client, u16 reg,
unsigned int len, u32 *val)
{
struct i2c_msg msgs[2];
u8 *data_be_p;
__be32 data_be = 0;
__be16 reg_addr_be = cpu_to_be16(reg);
int ret;
if (len > 4 || !len)
return -EINVAL;
data_be_p = (u8 *)&data_be;
/* Write register address */
msgs[0].addr = client->addr;
msgs[0].flags = 0;
msgs[0].len = 2;
msgs[0].buf = (u8 *)®_addr_be;
/* Read data from register */
msgs[1].addr = client->addr;
msgs[1].flags = I2C_M_RD;
msgs[1].len = len;
msgs[1].buf = &data_be_p[4 - len];
ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (ret != ARRAY_SIZE(msgs))
return -EIO;
*val = be32_to_cpu(data_be);
return 0;
}
static int ov7750_get_reso_dist(const struct ov7750_mode *mode,
struct v4l2_mbus_framefmt *framefmt)
{
return abs(mode->width - framefmt->width) +
abs(mode->height - framefmt->height);
}
static const struct ov7750_mode *
ov7750_find_best_fit(struct v4l2_subdev_format *fmt)
{
struct v4l2_mbus_framefmt *framefmt = &fmt->format;
int dist;
int cur_best_fit = 0;
int cur_best_fit_dist = -1;
unsigned int i;
for (i = 0; i < ARRAY_SIZE(supported_modes); i++) {
dist = ov7750_get_reso_dist(&supported_modes[i], framefmt);
if (cur_best_fit_dist == -1 || dist < cur_best_fit_dist) {
cur_best_fit_dist = dist;
cur_best_fit = i;
}
}
return &supported_modes[cur_best_fit];
}
static int ov7750_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct ov7750 *ov7750 = to_ov7750(sd);
const struct ov7750_mode *mode;
s64 h_blank, vblank_def;
mutex_lock(&ov7750->mutex);
mode = ov7750_find_best_fit(fmt);
fmt->format.code = MEDIA_BUS_FMT_SBGGR10_1X10;
fmt->format.width = mode->width;
fmt->format.height = mode->height;
fmt->format.field = V4L2_FIELD_NONE;
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
*v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format;
#else
mutex_unlock(&ov7750->mutex);
return -ENOTTY;
#endif
} else {
ov7750->cur_mode = mode;
h_blank = mode->hts_def - mode->width;
__v4l2_ctrl_modify_range(ov7750->hblank, h_blank,
h_blank, 1, h_blank);
vblank_def = mode->vts_def - mode->height;
__v4l2_ctrl_modify_range(ov7750->vblank, vblank_def,
OV7750_VTS_MAX - mode->height,
1, vblank_def);
}
mutex_unlock(&ov7750->mutex);
return 0;
}
static int ov7750_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct ov7750 *ov7750 = to_ov7750(sd);
const struct ov7750_mode *mode = ov7750->cur_mode;
mutex_lock(&ov7750->mutex);
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
fmt->format = *v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
#else
mutex_unlock(&ov7750->mutex);
return -ENOTTY;
#endif
} else {
fmt->format.width = mode->width;
fmt->format.height = mode->height;
fmt->format.code = MEDIA_BUS_FMT_SBGGR10_1X10;
fmt->format.field = V4L2_FIELD_NONE;
}
mutex_unlock(&ov7750->mutex);
return 0;
}
static int ov7750_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_mbus_code_enum *code)
{
if (code->index != 0)
return -EINVAL;
code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
return 0;
}
static int ov7750_enum_frame_sizes(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_frame_size_enum *fse)
{
if (fse->index >= ARRAY_SIZE(supported_modes))
return -EINVAL;
if (fse->code != MEDIA_BUS_FMT_SBGGR10_1X10)
return -EINVAL;
fse->min_width = supported_modes[fse->index].width;
fse->max_width = supported_modes[fse->index].width;
fse->max_height = supported_modes[fse->index].height;
fse->min_height = supported_modes[fse->index].height;
return 0;
}
static int ov7750_enable_test_pattern(struct ov7750 *ov7750, u32 pattern)
{
u32 val;
if (pattern)
val = (pattern - 1) | OV7750_TEST_PATTERN_ENABLE;
else
val = OV7750_TEST_PATTERN_DISABLE;
return ov7750_write_reg(ov7750->client,
OV7750_REG_TEST_PATTERN,
OV7750_REG_VALUE_08BIT,
val);
}
static void ov7750_get_module_inf(struct ov7750 *ov7750,
struct rkmodule_inf *inf)
{
memset(inf, 0, sizeof(*inf));
strlcpy(inf->base.sensor, OV7750_NAME, sizeof(inf->base.sensor));
strlcpy(inf->base.module, ov7750->module_name,
sizeof(inf->base.module));
strlcpy(inf->base.lens, ov7750->len_name, sizeof(inf->base.lens));
}
static long ov7750_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
{
struct ov7750 *ov7750 = to_ov7750(sd);
long ret = 0;
u32 stream = 0;
switch (cmd) {
case RKMODULE_GET_MODULE_INFO:
ov7750_get_module_inf(ov7750, (struct rkmodule_inf *)arg);
break;
case RKMODULE_SET_QUICK_STREAM:
stream = *((u32 *)arg);
if (stream)
ret = ov7750_write_reg(ov7750->client,
OV7750_REG_CTRL_MODE,
OV7750_REG_VALUE_08BIT,
OV7750_MODE_STREAMING);
else
ret = ov7750_write_reg(ov7750->client,
OV7750_REG_CTRL_MODE,
OV7750_REG_VALUE_08BIT,
OV7750_MODE_SW_STANDBY);
break;
default:
ret = -ENOTTY;
break;
}
return ret;
}
#ifdef CONFIG_COMPAT
static long ov7750_compat_ioctl32(struct v4l2_subdev *sd,
unsigned int cmd, unsigned long arg)
{
void __user *up = compat_ptr(arg);
struct rkmodule_inf *inf;
struct rkmodule_awb_cfg *cfg;
long ret;
u32 stream = 0;
switch (cmd) {
case RKMODULE_GET_MODULE_INFO:
inf = kzalloc(sizeof(*inf), GFP_KERNEL);
if (!inf) {
ret = -ENOMEM;
return ret;
}
ret = ov7750_ioctl(sd, cmd, inf);
if (!ret)
ret = copy_to_user(up, inf, sizeof(*inf));
kfree(inf);
break;
case RKMODULE_AWB_CFG:
cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
if (!cfg) {
ret = -ENOMEM;
return ret;
}
ret = copy_from_user(cfg, up, sizeof(*cfg));
if (!ret)
ret = ov7750_ioctl(sd, cmd, cfg);
kfree(cfg);
break;
case RKMODULE_SET_QUICK_STREAM:
ret = copy_from_user(&stream, up, sizeof(u32));
if (!ret)
ret = ov7750_ioctl(sd, cmd, &stream);
break;
default:
ret = -ENOIOCTLCMD;
break;
}
return ret;
}
#endif
static int __ov7750_start_stream(struct ov7750 *ov7750)
{
int ret;
ret = ov7750_write_array(ov7750->client, ov7750->cur_mode->reg_list);
if (ret)
return ret;
/* In case these controls are set before streaming */
mutex_unlock(&ov7750->mutex);
ret = v4l2_ctrl_handler_setup(&ov7750->ctrl_handler);
mutex_lock(&ov7750->mutex);
if (ret)
return ret;
return ov7750_write_reg(ov7750->client,
OV7750_REG_CTRL_MODE,
OV7750_REG_VALUE_08BIT,
OV7750_MODE_STREAMING);
}
static int __ov7750_stop_stream(struct ov7750 *ov7750)
{
return ov7750_write_reg(ov7750->client,
OV7750_REG_CTRL_MODE,
OV7750_REG_VALUE_08BIT,
OV7750_MODE_SW_STANDBY);
}
static int ov7750_s_stream(struct v4l2_subdev *sd, int on)
{
struct ov7750 *ov7750 = to_ov7750(sd);
struct i2c_client *client = ov7750->client;
int ret = 0;
mutex_lock(&ov7750->mutex);
on = !!on;
if (on == ov7750->streaming)
goto unlock_and_return;
if (on) {
ret = pm_runtime_get_sync(&client->dev);
if (ret < 0) {
pm_runtime_put_noidle(&client->dev);
goto unlock_and_return;
}
ret = __ov7750_start_stream(ov7750);
if (ret) {
v4l2_err(sd, "start stream failed while write regs\n");
pm_runtime_put(&client->dev);
goto unlock_and_return;
}
} else {
__ov7750_stop_stream(ov7750);
pm_runtime_put(&client->dev);
}
ov7750->streaming = on;
unlock_and_return:
mutex_unlock(&ov7750->mutex);
return ret;
}
static int ov7750_s_power(struct v4l2_subdev *sd, int on)
{
struct ov7750 *ov7750 = to_ov7750(sd);
struct i2c_client *client = ov7750->client;
int ret = 0;
mutex_lock(&ov7750->mutex);
/* If the power state is not modified - no work to do. */
if (ov7750->power_on == !!on)
goto unlock_and_return;
if (on) {
ret = pm_runtime_get_sync(&client->dev);
if (ret < 0) {
pm_runtime_put_noidle(&client->dev);
goto unlock_and_return;
}
ret = ov7750_write_array(ov7750->client, ov7750_global_regs);
if (ret) {
v4l2_err(sd, "could not set init registers\n");
pm_runtime_put_noidle(&client->dev);
goto unlock_and_return;
}
ov7750->power_on = true;
} else {
pm_runtime_put(&client->dev);
ov7750->power_on = false;
}
unlock_and_return:
mutex_unlock(&ov7750->mutex);
return ret;
}
/* Calculate the delay in us by clock rate and clock cycles */
static inline u32 ov7750_cal_delay(u32 cycles)
{
return DIV_ROUND_UP(cycles, OV7750_XVCLK_FREQ / 1000 / 1000);
}
static int __ov7750_power_on(struct ov7750 *ov7750)
{
int ret;
u32 delay_us;
struct device *dev = &ov7750->client->dev;
if (!IS_ERR_OR_NULL(ov7750->pins_default)) {
ret = pinctrl_select_state(ov7750->pinctrl,
ov7750->pins_default);
if (ret < 0)
dev_err(dev, "could not set pins\n");
}
ret = clk_set_rate(ov7750->xvclk, OV7750_XVCLK_FREQ);
if (ret < 0)
dev_warn(dev, "Failed to set xvclk rate (24MHz)\n");
if (clk_get_rate(ov7750->xvclk) != OV7750_XVCLK_FREQ)
dev_warn(dev, "xvclk mismatched, modes are based on 24MHz\n");
ret = clk_prepare_enable(ov7750->xvclk);
if (ret < 0) {
dev_err(dev, "Failed to enable xvclk\n");
return ret;
}
if (!IS_ERR(ov7750->reset_gpio))
gpiod_set_value_cansleep(ov7750->reset_gpio, 0);
ret = regulator_bulk_enable(OV7750_NUM_SUPPLIES, ov7750->supplies);
if (ret < 0) {
dev_err(dev, "Failed to enable regulators\n");
goto disable_clk;
}
if (!IS_ERR(ov7750->reset_gpio))
gpiod_set_value_cansleep(ov7750->reset_gpio, 1);
usleep_range(500, 1000);
if (!IS_ERR(ov7750->pwdn_gpio))
gpiod_set_value_cansleep(ov7750->pwdn_gpio, 1);
/* 8192 cycles prior to first SCCB transaction */
delay_us = ov7750_cal_delay(8192);
usleep_range(delay_us, delay_us * 2);
return 0;
disable_clk:
clk_disable_unprepare(ov7750->xvclk);
return ret;
}
static void __ov7750_power_off(struct ov7750 *ov7750)
{
int ret;
struct device *dev = &ov7750->client->dev;
if (!IS_ERR(ov7750->pwdn_gpio))
gpiod_set_value_cansleep(ov7750->pwdn_gpio, 0);
clk_disable_unprepare(ov7750->xvclk);
if (!IS_ERR(ov7750->reset_gpio))
gpiod_set_value_cansleep(ov7750->reset_gpio, 0);
if (!IS_ERR_OR_NULL(ov7750->pins_sleep)) {
ret = pinctrl_select_state(ov7750->pinctrl,
ov7750->pins_sleep);
if (ret < 0)
dev_err(dev, "could not set pins\n");
}
regulator_bulk_disable(OV7750_NUM_SUPPLIES, ov7750->supplies);
}
static int ov7750_runtime_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ov7750 *ov7750 = to_ov7750(sd);
return __ov7750_power_on(ov7750);
}
static int ov7750_runtime_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ov7750 *ov7750 = to_ov7750(sd);
__ov7750_power_off(ov7750);
return 0;
}
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
static int ov7750_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
struct ov7750 *ov7750 = to_ov7750(sd);
struct v4l2_mbus_framefmt *try_fmt =
v4l2_subdev_get_try_format(sd, fh->pad, 0);
const struct ov7750_mode *def_mode = &supported_modes[0];
mutex_lock(&ov7750->mutex);
/* Initialize try_fmt */
try_fmt->width = def_mode->width;
try_fmt->height = def_mode->height;
try_fmt->code = MEDIA_BUS_FMT_SBGGR10_1X10;
try_fmt->field = V4L2_FIELD_NONE;
mutex_unlock(&ov7750->mutex);
/* No crop or compose */
return 0;
}
#endif
static int ov7750_enum_frame_interval(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_frame_interval_enum *fie)
{
if (fie->index >= ARRAY_SIZE(supported_modes))
return -EINVAL;
if (fie->code != MEDIA_BUS_FMT_SBGGR10_1X10)
return -EINVAL;
fie->width = supported_modes[fie->index].width;
fie->height = supported_modes[fie->index].height;
fie->interval = supported_modes[fie->index].max_fps;
return 0;
}
static int ov7750_g_mbus_config(struct v4l2_subdev *sd,
struct v4l2_mbus_config *config)
{
u32 val = 0;
val = 1 << (OV7750_LANES - 1) |
V4L2_MBUS_CSI2_CHANNEL_0 |
V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
config->type = V4L2_MBUS_CSI2;
config->flags = val;
return 0;
}
static const struct dev_pm_ops ov7750_pm_ops = {
SET_RUNTIME_PM_OPS(ov7750_runtime_suspend,
ov7750_runtime_resume, NULL)
};
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
static const struct v4l2_subdev_internal_ops ov7750_internal_ops = {
.open = ov7750_open,
};
#endif
static const struct v4l2_subdev_core_ops ov7750_core_ops = {
.s_power = ov7750_s_power,
.ioctl = ov7750_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl32 = ov7750_compat_ioctl32,
#endif
};
static const struct v4l2_subdev_video_ops ov7750_video_ops = {
.s_stream = ov7750_s_stream,
.g_mbus_config = ov7750_g_mbus_config,
};
static const struct v4l2_subdev_pad_ops ov7750_pad_ops = {
.enum_mbus_code = ov7750_enum_mbus_code,
.enum_frame_size = ov7750_enum_frame_sizes,
.enum_frame_interval = ov7750_enum_frame_interval,
.get_fmt = ov7750_get_fmt,
.set_fmt = ov7750_set_fmt,
};
static const struct v4l2_subdev_ops ov7750_subdev_ops = {
.core = &ov7750_core_ops,
.video = &ov7750_video_ops,
.pad = &ov7750_pad_ops,
};
static int ov7750_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov7750 *ov7750 = container_of(ctrl->handler,
struct ov7750, ctrl_handler);
struct i2c_client *client = ov7750->client;
s64 max;
int ret = 0;
/* Propagate change of current control to all related controls */
switch (ctrl->id) {
case V4L2_CID_VBLANK:
/* Update max exposure while meeting expected vblanking */
max = ov7750->cur_mode->height + ctrl->val -
OV7750_EXP_MARGIN_LIMIT;
__v4l2_ctrl_modify_range(ov7750->exposure,
ov7750->exposure->minimum, max,
ov7750->exposure->step,
ov7750->exposure->default_value);
break;
}
if (!pm_runtime_get_if_in_use(&client->dev))
return 0;
switch (ctrl->id) {
case V4L2_CID_EXPOSURE:
/* 4 least significant bits of expsoure are fractional part */
ret = ov7750_write_reg(ov7750->client,
OV7750_REG_EXPOSURE,
OV7750_REG_VALUE_24BIT,
ctrl->val << 4);
break;
case V4L2_CID_ANALOGUE_GAIN:
ret = ov7750_write_reg(ov7750->client,
OV7750_REG_GAIN_H,
OV7750_REG_VALUE_08BIT,
(ctrl->val >> OV7750_GAIN_H_SHIFT) &
OV7750_GAIN_H_MASK);
ret |= ov7750_write_reg(ov7750->client,
OV7750_REG_GAIN_L,
OV7750_REG_VALUE_08BIT,
ctrl->val & OV7750_GAIN_L_MASK);
break;
case V4L2_CID_VBLANK:
ret = ov7750_write_reg(ov7750->client,
OV7750_REG_VTS,
OV7750_REG_VALUE_16BIT,
ctrl->val + ov7750->cur_mode->height);
break;
case V4L2_CID_TEST_PATTERN:
ret = ov7750_enable_test_pattern(ov7750, ctrl->val);
break;
default:
dev_warn(&client->dev, "%s Unhandled id:0x%x, val:0x%x\n",
__func__, ctrl->id, ctrl->val);
break;
}
pm_runtime_put(&client->dev);
return ret;
}
static const struct v4l2_ctrl_ops ov7750_ctrl_ops = {
.s_ctrl = ov7750_set_ctrl,
};
static int ov7750_initialize_controls(struct ov7750 *ov7750)
{
const struct ov7750_mode *mode;
struct v4l2_ctrl_handler *handler;
struct v4l2_ctrl *ctrl;
s64 exposure_max, vblank_def;
u32 h_blank;
int ret;
handler = &ov7750->ctrl_handler;
mode = ov7750->cur_mode;
ret = v4l2_ctrl_handler_init(handler, 8);
if (ret)
return ret;
handler->lock = &ov7750->mutex;
ctrl = v4l2_ctrl_new_int_menu(handler, NULL, V4L2_CID_LINK_FREQ,
0, 0, link_freq_menu_items);
if (ctrl)
ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
v4l2_ctrl_new_std(handler, NULL, V4L2_CID_PIXEL_RATE,
0, OV7750_PIXEL_RATE, 1, OV7750_PIXEL_RATE);
h_blank = mode->hts_def - mode->width;
ov7750->hblank = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK,
h_blank, h_blank, 1, h_blank);
if (ov7750->hblank)
ov7750->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
vblank_def = mode->vts_def - mode->height;
ov7750->vblank = v4l2_ctrl_new_std(handler, &ov7750_ctrl_ops,
V4L2_CID_VBLANK, vblank_def,
OV7750_VTS_MAX - mode->height,
1, vblank_def);
exposure_max = mode->vts_def - OV7750_EXP_MARGIN_LIMIT;
ov7750->exposure = v4l2_ctrl_new_std(handler, &ov7750_ctrl_ops,
V4L2_CID_EXPOSURE, OV7750_EXPOSURE_MIN,
exposure_max, OV7750_EXPOSURE_STEP,
mode->exp_def);
ov7750->anal_gain = v4l2_ctrl_new_std(handler, &ov7750_ctrl_ops,
V4L2_CID_ANALOGUE_GAIN, OV7750_GAIN_MIN,
OV7750_GAIN_MAX, OV7750_GAIN_STEP,
OV7750_GAIN_DEFAULT);
ov7750->test_pattern = v4l2_ctrl_new_std_menu_items(handler,
&ov7750_ctrl_ops, V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(ov7750_test_pattern_menu) - 1,
0, 0, ov7750_test_pattern_menu);
if (handler->error) {
ret = handler->error;
dev_err(&ov7750->client->dev,
"Failed to init controls(%d)\n", ret);
goto err_free_handler;
}
ov7750->subdev.ctrl_handler = handler;
return 0;
err_free_handler:
v4l2_ctrl_handler_free(handler);
return ret;
}
static int ov7750_check_sensor_id(struct ov7750 *ov7750,
struct i2c_client *client)
{
struct device *dev = &ov7750->client->dev;
u32 id = 0;
int ret;
ret = ov7750_read_reg(client, OV7750_REG_CHIP_ID,
OV7750_REG_VALUE_16BIT, &id);
if (id != CHIP_ID) {
dev_err(dev, "Unexpected sensor id(%04x), ret(%d)\n", id, ret);
return -ENODEV;
}
ret = ov7750_read_reg(client, OV7750_CHIP_REVISION_REG,
OV7750_REG_VALUE_08BIT, &id);
if (ret) {
dev_err(dev, "Read chip revision register error\n");
return ret;
}
id &= 0xf0;
if (id == OV7750_R1F)
ov7750_global_regs = ov7750_global_regs_r1f;
else
ov7750_global_regs = ov7750_global_regs_rxx;
dev_info(dev, "Detected OV%04x sensor, REVISION 0x%x\n", CHIP_ID, id);
return 0;
}
static int ov7750_configure_regulators(struct ov7750 *ov7750)
{
unsigned int i;
for (i = 0; i < OV7750_NUM_SUPPLIES; i++)
ov7750->supplies[i].supply = ov7750_supply_names[i];
return devm_regulator_bulk_get(&ov7750->client->dev,
OV7750_NUM_SUPPLIES,
ov7750->supplies);
}
static int ov7750_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct device_node *node = dev->of_node;
struct ov7750 *ov7750;
struct v4l2_subdev *sd;
char facing[2];
int ret;
dev_info(dev, "driver version: %02x.%02x.%02x",
DRIVER_VERSION >> 16,
(DRIVER_VERSION & 0xff00) >> 8,
DRIVER_VERSION & 0x00ff);
ov7750 = devm_kzalloc(dev, sizeof(*ov7750), GFP_KERNEL);
if (!ov7750)
return -ENOMEM;
ret = of_property_read_u32(node, RKMODULE_CAMERA_MODULE_INDEX,
&ov7750->module_index);
ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_FACING,
&ov7750->module_facing);
ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_NAME,
&ov7750->module_name);
ret |= of_property_read_string(node, RKMODULE_CAMERA_LENS_NAME,
&ov7750->len_name);
if (ret) {
dev_err(dev, "could not get module information!\n");
return -EINVAL;
}
ov7750->client = client;
ov7750->cur_mode = &supported_modes[0];
ov7750->xvclk = devm_clk_get(dev, "xvclk");
if (IS_ERR(ov7750->xvclk)) {
dev_err(dev, "Failed to get xvclk\n");
return -EINVAL;
}
ov7750->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(ov7750->reset_gpio))
dev_warn(dev, "Failed to get reset-gpios\n");
ov7750->pwdn_gpio = devm_gpiod_get(dev, "pwdn", GPIOD_OUT_LOW);
if (IS_ERR(ov7750->pwdn_gpio))
dev_warn(dev, "Failed to get pwdn-gpios\n");
ret = ov7750_configure_regulators(ov7750);
if (ret) {
dev_err(dev, "Failed to get power regulators\n");
return ret;
}
ov7750->pinctrl = devm_pinctrl_get(dev);
if (!IS_ERR(ov7750->pinctrl)) {
ov7750->pins_default =
pinctrl_lookup_state(ov7750->pinctrl,
OF_CAMERA_PINCTRL_DEFAULT);
if (IS_ERR(ov7750->pins_default))
dev_err(dev, "could not get default pinstate\n");
ov7750->pins_sleep =
pinctrl_lookup_state(ov7750->pinctrl,
OF_CAMERA_PINCTRL_SLEEP);
if (IS_ERR(ov7750->pins_sleep))
dev_err(dev, "could not get sleep pinstate\n");
}
mutex_init(&ov7750->mutex);
sd = &ov7750->subdev;
v4l2_i2c_subdev_init(sd, client, &ov7750_subdev_ops);
ret = ov7750_initialize_controls(ov7750);
if (ret)
goto err_destroy_mutex;
ret = __ov7750_power_on(ov7750);
if (ret)
goto err_free_handler;
ret = ov7750_check_sensor_id(ov7750, client);
if (ret)
goto err_power_off;
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
sd->internal_ops = &ov7750_internal_ops;
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
V4L2_SUBDEV_FL_HAS_EVENTS;
#endif
#if defined(CONFIG_MEDIA_CONTROLLER)
ov7750->pad.flags = MEDIA_PAD_FL_SOURCE;
sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
ret = media_entity_pads_init(&sd->entity, 1, &ov7750->pad);
if (ret < 0)
goto err_power_off;
#endif
memset(facing, 0, sizeof(facing));
if (strcmp(ov7750->module_facing, "back") == 0)
facing[0] = 'b';
else
facing[0] = 'f';
snprintf(sd->name, sizeof(sd->name), "m%02d_%s_%s %s",
ov7750->module_index, facing,
OV7750_NAME, dev_name(sd->dev));
ret = v4l2_async_register_subdev_sensor_common(sd);
if (ret) {
dev_err(dev, "v4l2 async register subdev failed\n");
goto err_clean_entity;
}
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
pm_runtime_idle(dev);
return 0;
err_clean_entity:
#if defined(CONFIG_MEDIA_CONTROLLER)
media_entity_cleanup(&sd->entity);
#endif
err_power_off:
__ov7750_power_off(ov7750);
err_free_handler:
v4l2_ctrl_handler_free(&ov7750->ctrl_handler);
err_destroy_mutex:
mutex_destroy(&ov7750->mutex);
return ret;
}
static int ov7750_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ov7750 *ov7750 = to_ov7750(sd);
v4l2_async_unregister_subdev(sd);
#if defined(CONFIG_MEDIA_CONTROLLER)
media_entity_cleanup(&sd->entity);
#endif
v4l2_ctrl_handler_free(&ov7750->ctrl_handler);
mutex_destroy(&ov7750->mutex);
pm_runtime_disable(&client->dev);
if (!pm_runtime_status_suspended(&client->dev))
__ov7750_power_off(ov7750);
pm_runtime_set_suspended(&client->dev);
return 0;
}
#if IS_ENABLED(CONFIG_OF)
static const struct of_device_id ov7750_of_match[] = {
{ .compatible = "ovti,ov7750" },
{},
};
MODULE_DEVICE_TABLE(of, ov7750_of_match);
#endif
static const struct i2c_device_id ov7750_match_id[] = {
{ "ovti,ov7750", 0 },
{ },
};
static struct i2c_driver ov7750_i2c_driver = {
.driver = {
.name = OV7750_NAME,
.pm = &ov7750_pm_ops,
.of_match_table = of_match_ptr(ov7750_of_match),
},
.probe = &ov7750_probe,
.remove = &ov7750_remove,
.id_table = ov7750_match_id,
};
static int __init sensor_mod_init(void)
{
return i2c_add_driver(&ov7750_i2c_driver);
}
static void __exit sensor_mod_exit(void)
{
i2c_del_driver(&ov7750_i2c_driver);
}
device_initcall_sync(sensor_mod_init);
module_exit(sensor_mod_exit);
MODULE_DESCRIPTION("OmniVision ov7750 sensor driver");
MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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