// SPDX-License-Identifier: GPL-2.0
|
/*
|
* ov7725 driver
|
*
|
* Copyright (C) 2018 Fuzhou Rockchip Electronics Co., Ltd.
|
*/
|
|
#include <linux/clk.h>
|
#include <linux/device.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 <media/media-entity.h>
|
#include <media/v4l2-async.h>
|
#include <media/v4l2-ctrls.h>
|
#include <media/v4l2-subdev.h>
|
|
#define REG_CHIP_ID_H 0x0a
|
#define REG_CHIP_ID_L 0x0b
|
#define CHIP_ID_H 0x77
|
#define CHIP_ID_L 0x21
|
|
#define REG_NULL 0xFF
|
|
#define ov7725_XVCLK_FREQ 24000000
|
|
static const char * const ov7725_supply_names[] = {
|
"avdd",
|
"dovdd",
|
"dvdd",
|
};
|
|
#define ov7725_NUM_SUPPLIES ARRAY_SIZE(ov7725_supply_names)
|
|
struct regval {
|
u8 addr;
|
u8 val;
|
};
|
|
struct ov7725_mode {
|
u32 width;
|
u32 height;
|
const struct regval *reg_list;
|
};
|
|
struct ov7725 {
|
struct i2c_client *client;
|
struct clk *xvclk;
|
struct gpio_desc *reset_gpio;
|
struct gpio_desc *pwdn_gpio;
|
struct regulator_bulk_data supplies[ov7725_NUM_SUPPLIES];
|
|
bool streaming;
|
struct mutex mutex; /* lock to serialize v4l2 callback */
|
struct v4l2_subdev subdev;
|
struct media_pad pad;
|
|
const struct ov7725_mode *cur_mode;
|
};
|
|
#define to_ov7725(sd) container_of(sd, struct ov7725, subdev)
|
|
/* 30fps at 24MHz input clock,4x maximum gain */
|
static struct regval ov7725_640x480_30fps[] = {
|
{0x12, 0x80},
|
{0x3d, 0x03},
|
{0x17, 0x25}, /* Raw: 0x17,0x22 */
|
{0x18, 0xa4}, /* Raw: 0x18,0xa4 */
|
{0x19, 0x06}, /* Raw: 0x19,0x07 */
|
{0x1a, 0xf0},
|
{0x32, 0x60}, /* Raw: 0x32,0x00 */
|
{0x29, 0xa0},
|
{0x2c, 0xf0},
|
{0x2a, 0x00},
|
{0x11, 0x01},
|
{0x42, 0x7f},
|
{0x4d, 0x00},
|
{0x63, 0xe0},
|
{0x64, 0xff},
|
{0x65, 0x20},
|
{0x66, 0x00},
|
{0x67, 0x48},
|
{0x13, 0xf0},
|
{0x0d, 0x41},
|
{0x0f, 0xc5},
|
|
{0x14, 0x17}, /* 0x14,0x11 */
|
{0x22, 0x3f},
|
{0x23, 0x07},
|
{0x24, 0x44},
|
{0x25, 0x3c},
|
{0x26, 0xa1},
|
{0x2b, 0x00},
|
{0x6b, 0xaa},
|
{0x13, 0xff},
|
{0x90, 0x05},
|
{0x91, 0x01},
|
{0x92, 0x03},
|
{0x93, 0x00},
|
{0x94, 0x40},
|
{0x95, 0x40},
|
{0x96, 0x00},
|
{0x97, 0x11},
|
{0x98, 0x2f},
|
{0x99, 0x40},
|
{0x9a, 0x9e},
|
{0x9b, 0x08},
|
{0x9c, 0x20},
|
{0x9e, 0x81},
|
{0xa6, 0x06},
|
{0x7e, 0x0c},
|
{0x7f, 0x16},
|
{0x80, 0x2a},
|
{0x81, 0x4e},
|
{0x82, 0x61},
|
{0x83, 0x6f},
|
{0x84, 0x7b},
|
{0x85, 0x86},
|
{0x86, 0x8e},
|
{0x87, 0x97},
|
{0x88, 0xa4},
|
{0x89, 0xaf},
|
{0x8a, 0xc5},
|
{0x8b, 0xd7},
|
{0x8c, 0xe8},
|
{0x8d, 0x20},
|
{0x33, 0x00},
|
{0x22, 0x99},
|
{0x23, 0x03},
|
{0x4a, 0x00},
|
{0x49, 0x13},
|
{0x47, 0x08},
|
{0x4b, 0x14},
|
{0x4c, 0x17},
|
{0x46, 0x05},
|
{0x0e, 0x65},
|
{0x0c, 0x00},
|
{REG_NULL, 0x0},
|
};
|
|
static struct regval ov7725_1600x1200_7fps[] = {
|
{REG_NULL, 0x0},
|
};
|
|
static const struct ov7725_mode supported_modes[] = {
|
{
|
.width = 640,
|
.height = 480,
|
.reg_list = ov7725_640x480_30fps,
|
},
|
{
|
.width = 1600,
|
.height = 1200,
|
.reg_list = ov7725_1600x1200_7fps,
|
},
|
};
|
|
static int ov7725_write_reg(struct i2c_client *client, u8 reg, u8 val)
|
{
|
int ret;
|
|
ret = i2c_smbus_write_byte_data(client, reg, val);
|
|
if (ret < 0)
|
dev_err(&client->dev, "write reg error: %d\n", ret);
|
|
return ret;
|
}
|
|
static int ov7725_write_array(struct i2c_client *client,
|
const struct regval *regs)
|
{
|
int i, ret = 0;
|
|
for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++)
|
ret = ov7725_write_reg(client, regs[i].addr, regs[i].val);
|
|
return ret;
|
}
|
|
static inline u8 ov7725_read_reg(struct i2c_client *client, u8 reg)
|
{
|
return i2c_smbus_read_byte_data(client, reg);
|
}
|
|
static int ov7725_get_reso_dist(const struct ov7725_mode *mode,
|
struct v4l2_mbus_framefmt *framefmt)
|
{
|
return abs(mode->width - framefmt->width) +
|
abs(mode->height - framefmt->height);
|
}
|
|
static const struct ov7725_mode *
|
ov7725_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;
|
size_t i;
|
|
for (i = 0; i < ARRAY_SIZE(supported_modes); i++) {
|
dist = ov7725_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 ov7725_set_fmt(struct v4l2_subdev *sd,
|
struct v4l2_subdev_pad_config *cfg,
|
struct v4l2_subdev_format *fmt)
|
{
|
struct ov7725 *ov7725 = to_ov7725(sd);
|
const struct ov7725_mode *mode;
|
|
mutex_lock(&ov7725->mutex);
|
|
mode = ov7725_find_best_fit(fmt);
|
fmt->format.code = MEDIA_BUS_FMT_UYVY8_2X8;
|
fmt->format.width = mode->width;
|
fmt->format.height = mode->height;
|
fmt->format.field = V4L2_FIELD_NONE;
|
fmt->format.colorspace = V4L2_COLORSPACE_JPEG;
|
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(&ov7725->mutex);
|
return -ENOTTY;
|
#endif
|
} else {
|
ov7725->cur_mode = mode;
|
}
|
|
mutex_unlock(&ov7725->mutex);
|
|
return 0;
|
}
|
|
static int ov7725_get_fmt(struct v4l2_subdev *sd,
|
struct v4l2_subdev_pad_config *cfg,
|
struct v4l2_subdev_format *fmt)
|
{
|
struct ov7725 *ov7725 = to_ov7725(sd);
|
const struct ov7725_mode *mode = ov7725->cur_mode;
|
|
mutex_lock(&ov7725->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(&ov7725->mutex);
|
return -ENOTTY;
|
#endif
|
} else {
|
fmt->format.width = mode->width;
|
fmt->format.height = mode->height;
|
fmt->format.code = MEDIA_BUS_FMT_UYVY8_2X8;
|
fmt->format.field = V4L2_FIELD_NONE;
|
fmt->format.colorspace = V4L2_COLORSPACE_JPEG;
|
}
|
mutex_unlock(&ov7725->mutex);
|
|
return 0;
|
}
|
|
static int ov7725_enum_mbus_code(struct v4l2_subdev *sd,
|
struct v4l2_subdev_pad_config *cfg,
|
struct v4l2_subdev_mbus_code_enum *code)
|
{
|
if (code->index >= ARRAY_SIZE(supported_modes))
|
return -EINVAL;
|
|
code->code = MEDIA_BUS_FMT_UYVY8_2X8;
|
|
return 0;
|
}
|
|
static int ov7725_enum_frame_sizes(struct v4l2_subdev *sd,
|
struct v4l2_subdev_pad_config *cfg,
|
struct v4l2_subdev_frame_size_enum *fse)
|
{
|
u32 index = fse->index;
|
|
if (index >= ARRAY_SIZE(supported_modes))
|
return -EINVAL;
|
|
fse->code = MEDIA_BUS_FMT_UYVY8_2X8;
|
|
fse->min_width = supported_modes[index].width;
|
fse->max_width = supported_modes[index].width;
|
fse->max_height = supported_modes[index].height;
|
fse->min_height = supported_modes[index].height;
|
|
return 0;
|
}
|
|
static int __ov7725_power_on(struct ov7725 *ov7725)
|
{
|
int ret;
|
struct device *dev = &ov7725->client->dev;
|
|
if (!IS_ERR(ov7725->reset_gpio))
|
gpiod_set_value_cansleep(ov7725->reset_gpio, 0);
|
|
ret = regulator_bulk_enable(ov7725_NUM_SUPPLIES, ov7725->supplies);
|
if (ret < 0) {
|
dev_err(dev, "Failed to enable regulators\n");
|
return ret;
|
}
|
|
if (!IS_ERR(ov7725->xvclk)) {
|
ret = clk_prepare_enable(ov7725->xvclk);
|
if (ret < 0) {
|
dev_err(dev, "Failed to enable xvclk\n");
|
return ret;
|
}
|
}
|
|
if (!IS_ERR(ov7725->pwdn_gpio))
|
gpiod_set_value_cansleep(ov7725->pwdn_gpio, 0);
|
|
if (!IS_ERR(ov7725->reset_gpio))
|
gpiod_set_value_cansleep(ov7725->reset_gpio, 1);
|
|
return 0;
|
}
|
|
static void __ov7725_power_off(struct ov7725 *ov7725)
|
{
|
if (!IS_ERR(ov7725->reset_gpio))
|
gpiod_set_value_cansleep(ov7725->reset_gpio, 0);
|
if (!IS_ERR(ov7725->pwdn_gpio))
|
gpiod_set_value_cansleep(ov7725->pwdn_gpio, 1);
|
|
if (!IS_ERR(ov7725->xvclk))
|
clk_disable_unprepare(ov7725->xvclk);
|
|
regulator_bulk_disable(ov7725_NUM_SUPPLIES, ov7725->supplies);
|
}
|
|
static int ov7725_s_stream(struct v4l2_subdev *sd, int on)
|
{
|
struct ov7725 *ov7725 = to_ov7725(sd);
|
struct i2c_client *client = ov7725->client;
|
int ret = 0;
|
|
mutex_lock(&ov7725->mutex);
|
|
on = !!on;
|
if (on == ov7725->streaming)
|
goto unlock_and_return;
|
|
if (on) {
|
ret = pm_runtime_get_sync(&ov7725->client->dev);
|
if (ret < 0) {
|
pm_runtime_put_noidle(&client->dev);
|
goto unlock_and_return;
|
}
|
|
ret = ov7725_write_array(ov7725->client,
|
ov7725->cur_mode->reg_list);
|
if (ret) {
|
pm_runtime_put(&client->dev);
|
goto unlock_and_return;
|
}
|
|
} else {
|
pm_runtime_put(&client->dev);
|
}
|
|
ov7725->streaming = on;
|
|
unlock_and_return:
|
mutex_unlock(&ov7725->mutex);
|
|
return ret;
|
}
|
|
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
|
static int ov7725_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
|
{
|
struct ov7725 *ov7725 = to_ov7725(sd);
|
struct v4l2_mbus_framefmt *try_fmt =
|
v4l2_subdev_get_try_format(sd, fh->pad, 0);
|
const struct ov7725_mode *def_mode = &supported_modes[0];
|
|
mutex_lock(&ov7725->mutex);
|
|
try_fmt->width = def_mode->width;
|
try_fmt->height = def_mode->height;
|
try_fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
|
try_fmt->field = V4L2_FIELD_NONE;
|
try_fmt->colorspace = V4L2_COLORSPACE_JPEG;
|
|
mutex_unlock(&ov7725->mutex);
|
|
return 0;
|
}
|
#endif
|
|
static int ov7725_runtime_resume(struct device *dev)
|
{
|
struct i2c_client *client = to_i2c_client(dev);
|
struct v4l2_subdev *sd = i2c_get_clientdata(client);
|
struct ov7725 *ov7725 = to_ov7725(sd);
|
|
return __ov7725_power_on(ov7725);
|
}
|
|
static int ov7725_runtime_suspend(struct device *dev)
|
{
|
struct i2c_client *client = to_i2c_client(dev);
|
struct v4l2_subdev *sd = i2c_get_clientdata(client);
|
struct ov7725 *ov7725 = to_ov7725(sd);
|
|
__ov7725_power_off(ov7725);
|
|
return 0;
|
}
|
|
static const struct dev_pm_ops ov7725_pm_ops = {
|
SET_RUNTIME_PM_OPS(ov7725_runtime_suspend,
|
ov7725_runtime_resume, NULL)
|
};
|
|
static const struct v4l2_subdev_video_ops ov7725_video_ops = {
|
.s_stream = ov7725_s_stream,
|
};
|
|
static const struct v4l2_subdev_pad_ops ov7725_pad_ops = {
|
.enum_mbus_code = ov7725_enum_mbus_code,
|
.enum_frame_size = ov7725_enum_frame_sizes,
|
.get_fmt = ov7725_get_fmt,
|
.set_fmt = ov7725_set_fmt,
|
};
|
|
static const struct v4l2_subdev_ops ov7725_subdev_ops = {
|
.video = &ov7725_video_ops,
|
.pad = &ov7725_pad_ops,
|
};
|
|
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
|
static const struct v4l2_subdev_internal_ops ov7725_internal_ops = {
|
.open = ov7725_open,
|
};
|
#endif
|
|
static int ov7725_check_sensor_id(struct ov7725 *ov7725,
|
struct i2c_client *client)
|
{
|
struct device *dev = &ov7725->client->dev;
|
u8 id_h = 0, id_l = 0;
|
|
id_h = ov7725_read_reg(client, REG_CHIP_ID_H);
|
id_l = ov7725_read_reg(client, REG_CHIP_ID_L);
|
if (id_h != CHIP_ID_H && id_l != CHIP_ID_L) {
|
dev_err(dev, "Wrong camera sensor id(0x%02x%02x)\n",
|
id_h, id_l);
|
return -EINVAL;
|
}
|
|
dev_info(dev, "Detected ov7725 (0x%02x%02x) sensor\n",
|
CHIP_ID_H, CHIP_ID_L);
|
|
return 0;
|
}
|
|
static int ov7725_configure_regulators(struct ov7725 *ov7725)
|
{
|
u32 i;
|
|
for (i = 0; i < ov7725_NUM_SUPPLIES; i++)
|
ov7725->supplies[i].supply = ov7725_supply_names[i];
|
|
return devm_regulator_bulk_get(&ov7725->client->dev,
|
ov7725_NUM_SUPPLIES,
|
ov7725->supplies);
|
}
|
|
static int ov7725_probe(struct i2c_client *client,
|
const struct i2c_device_id *id)
|
{
|
struct device *dev = &client->dev;
|
struct ov7725 *ov7725;
|
int ret;
|
|
ov7725 = devm_kzalloc(dev, sizeof(*ov7725), GFP_KERNEL);
|
if (!ov7725)
|
return -ENOMEM;
|
|
ov7725->client = client;
|
ov7725->cur_mode = &supported_modes[0];
|
|
ov7725->xvclk = devm_clk_get(dev, "xvclk");
|
if (IS_ERR(ov7725->xvclk)) {
|
dev_err(dev, "Failed to get xvclk\n");
|
return -EINVAL;
|
}
|
ret = clk_set_rate(ov7725->xvclk, ov7725_XVCLK_FREQ);
|
if (ret < 0) {
|
dev_err(dev, "Failed to set xvclk rate (24MHz)\n");
|
return ret;
|
}
|
if (clk_get_rate(ov7725->xvclk) != ov7725_XVCLK_FREQ)
|
dev_warn(dev, "xvclk mismatched, modes are based on 24MHz\n");
|
|
ov7725->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
|
if (IS_ERR(ov7725->reset_gpio))
|
dev_warn(dev, "Failed to get reset-gpios\n");
|
|
ov7725->pwdn_gpio = devm_gpiod_get(dev, "pwdn", GPIOD_OUT_LOW);
|
if (IS_ERR(ov7725->pwdn_gpio))
|
dev_warn(dev, "Failed to get ov7725-gpios\n");
|
|
ret = ov7725_configure_regulators(ov7725);
|
if (ret) {
|
dev_warn(dev, "Failed to get power regulators\n");
|
return ret;
|
}
|
|
mutex_init(&ov7725->mutex);
|
v4l2_i2c_subdev_init(&ov7725->subdev, client, &ov7725_subdev_ops);
|
|
ret = __ov7725_power_on(ov7725);
|
if (ret)
|
goto err_destroy_mutex;
|
|
ret = ov7725_check_sensor_id(ov7725, client);
|
if (ret)
|
goto err_power_off;
|
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
|
ov7725->subdev.internal_ops = &ov7725_internal_ops;
|
ov7725->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
|
#endif
|
#if defined(CONFIG_MEDIA_CONTROLLER)
|
ov7725->pad.flags = MEDIA_PAD_FL_SOURCE;
|
ov7725->subdev.entity.type = MEDIA_ENT_T_V4L2_SUBDEV_SENSOR;
|
ret = media_entity_init(&ov7725->subdev.entity, 1, &ov7725->pad, 0);
|
if (ret < 0)
|
goto err_power_off;
|
#endif
|
|
ret = v4l2_async_register_subdev(&ov7725->subdev);
|
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(&ov7725->subdev.entity);
|
#endif
|
err_power_off:
|
__ov7725_power_off(ov7725);
|
err_destroy_mutex:
|
mutex_destroy(&ov7725->mutex);
|
|
return ret;
|
}
|
|
static int ov7725_remove(struct i2c_client *client)
|
{
|
struct v4l2_subdev *sd = i2c_get_clientdata(client);
|
struct ov7725 *ov7725 = to_ov7725(sd);
|
|
v4l2_async_unregister_subdev(sd);
|
#if defined(CONFIG_MEDIA_CONTROLLER)
|
media_entity_cleanup(&sd->entity);
|
#endif
|
mutex_destroy(&ov7725->mutex);
|
|
pm_runtime_disable(&client->dev);
|
if (!pm_runtime_status_suspended(&client->dev))
|
__ov7725_power_off(ov7725);
|
pm_runtime_set_suspended(&client->dev);
|
|
return 0;
|
}
|
|
#if IS_ENABLED(CONFIG_OF)
|
static const struct of_device_id ov7725_of_match[] = {
|
{ .compatible = "ovti,ov7725" },
|
{},
|
};
|
MODULE_DEVICE_TABLE(of, ov7725_of_match);
|
#endif
|
|
static const struct i2c_device_id ov7725_match_id[] = {
|
{"ovti,ov7251", 0},
|
{},
|
};
|
|
static struct i2c_driver ov7725_i2c_driver = {
|
.driver = {
|
.name = "ov7725",
|
.pm = &ov7725_pm_ops,
|
.of_match_table = of_match_ptr(ov7725_of_match),
|
},
|
.probe = ov7725_probe,
|
.remove = ov7725_remove,
|
.id_table = ov7725_match_id,
|
};
|
|
static int __init sensor_mod_init(void)
|
{
|
return i2c_add_driver(&ov7725_i2c_driver);
|
}
|
|
static void __exit sensor_mod_exit(void)
|
{
|
i2c_del_driver(&ov7725_i2c_driver);
|
}
|
|
device_initcall_sync(sensor_mod_init);
|
module_exit(sensor_mod_exit);
|
|
MODULE_DESCRIPTION("OmniVision ov7725 sensor driver");
|
MODULE_LICENSE("GPL v2");
|
