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linuxdebug/drivers/media/i2c/ov02a10.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2020 MediaTek Inc.
#include <linux/clk.h>
#include <linux/delay.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/units.h>
#include <media/media-entity.h>
#include <media/v4l2-async.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-subdev.h>
#define OV02A10_ID 0x2509
#define OV02A10_ID_MASK GENMASK(15, 0)
#define OV02A10_REG_CHIP_ID 0x02
/* Bit[1] vertical upside down */
/* Bit[0] horizontal mirror */
#define REG_MIRROR_FLIP_CONTROL 0x3f
/* Orientation */
#define REG_MIRROR_FLIP_ENABLE 0x03
/* Bit[2:0] MIPI transmission speed select */
#define TX_SPEED_AREA_SEL 0xa1
#define OV02A10_MIPI_TX_SPEED_DEFAULT 0x04
#define REG_PAGE_SWITCH 0xfd
#define REG_GLOBAL_EFFECTIVE 0x01
#define REG_ENABLE BIT(0)
#define REG_SC_CTRL_MODE 0xac
#define SC_CTRL_MODE_STANDBY 0x00
#define SC_CTRL_MODE_STREAMING 0x01
/* Exposure control */
#define OV02A10_EXP_SHIFT 8
#define OV02A10_REG_EXPOSURE_H 0x03
#define OV02A10_REG_EXPOSURE_L 0x04
#define OV02A10_EXPOSURE_MIN 4
#define OV02A10_EXPOSURE_MAX_MARGIN 4
#define OV02A10_EXPOSURE_STEP 1
/* Vblanking control */
#define OV02A10_VTS_SHIFT 8
#define OV02A10_REG_VTS_H 0x05
#define OV02A10_REG_VTS_L 0x06
#define OV02A10_VTS_MAX 0x209f
#define OV02A10_BASE_LINES 1224
/* Analog gain control */
#define OV02A10_REG_GAIN 0x24
#define OV02A10_GAIN_MIN 0x10
#define OV02A10_GAIN_MAX 0xf8
#define OV02A10_GAIN_STEP 0x01
#define OV02A10_GAIN_DEFAULT 0x40
/* Test pattern control */
#define OV02A10_REG_TEST_PATTERN 0xb6
#define OV02A10_LINK_FREQ_390MHZ (390 * HZ_PER_MHZ)
#define OV02A10_ECLK_FREQ (24 * HZ_PER_MHZ)
/* Number of lanes supported by this driver */
#define OV02A10_DATA_LANES 1
/* Bits per sample of sensor output */
#define OV02A10_BITS_PER_SAMPLE 10
static const char * const ov02a10_supply_names[] = {
"dovdd", /* Digital I/O power */
"avdd", /* Analog power */
"dvdd", /* Digital core power */
};
struct ov02a10_reg {
u8 addr;
u8 val;
};
struct ov02a10_reg_list {
u32 num_of_regs;
const struct ov02a10_reg *regs;
};
struct ov02a10_mode {
u32 width;
u32 height;
u32 exp_def;
u32 hts_def;
u32 vts_def;
const struct ov02a10_reg_list reg_list;
};
struct ov02a10 {
u32 eclk_freq;
/* Indication of MIPI transmission speed select */
u32 mipi_clock_voltage;
struct clk *eclk;
struct gpio_desc *pd_gpio;
struct gpio_desc *rst_gpio;
struct regulator_bulk_data supplies[ARRAY_SIZE(ov02a10_supply_names)];
bool streaming;
bool upside_down;
/*
* Serialize control access, get/set format, get selection
* and start streaming.
*/
struct mutex mutex;
struct v4l2_subdev subdev;
struct media_pad pad;
struct v4l2_mbus_framefmt fmt;
struct v4l2_ctrl_handler ctrl_handler;
struct v4l2_ctrl *exposure;
const struct ov02a10_mode *cur_mode;
};
static inline struct ov02a10 *to_ov02a10(struct v4l2_subdev *sd)
{
return container_of(sd, struct ov02a10, subdev);
}
/*
* eclk 24Mhz
* pclk 39Mhz
* linelength 934(0x3a6)
* framelength 1390(0x56E)
* grabwindow_width 1600
* grabwindow_height 1200
* max_framerate 30fps
* mipi_datarate per lane 780Mbps
*/
static const struct ov02a10_reg ov02a10_1600x1200_regs[] = {
{0xfd, 0x01},
{0xac, 0x00},
{0xfd, 0x00},
{0x2f, 0x29},
{0x34, 0x00},
{0x35, 0x21},
{0x30, 0x15},
{0x33, 0x01},
{0xfd, 0x01},
{0x44, 0x00},
{0x2a, 0x4c},
{0x2b, 0x1e},
{0x2c, 0x60},
{0x25, 0x11},
{0x03, 0x01},
{0x04, 0xae},
{0x09, 0x00},
{0x0a, 0x02},
{0x06, 0xa6},
{0x31, 0x00},
{0x24, 0x40},
{0x01, 0x01},
{0xfb, 0x73},
{0xfd, 0x01},
{0x16, 0x04},
{0x1c, 0x09},
{0x21, 0x42},
{0x12, 0x04},
{0x13, 0x10},
{0x11, 0x40},
{0x33, 0x81},
{0xd0, 0x00},
{0xd1, 0x01},
{0xd2, 0x00},
{0x50, 0x10},
{0x51, 0x23},
{0x52, 0x20},
{0x53, 0x10},
{0x54, 0x02},
{0x55, 0x20},
{0x56, 0x02},
{0x58, 0x48},
{0x5d, 0x15},
{0x5e, 0x05},
{0x66, 0x66},
{0x68, 0x68},
{0x6b, 0x00},
{0x6c, 0x00},
{0x6f, 0x40},
{0x70, 0x40},
{0x71, 0x0a},
{0x72, 0xf0},
{0x73, 0x10},
{0x75, 0x80},
{0x76, 0x10},
{0x84, 0x00},
{0x85, 0x10},
{0x86, 0x10},
{0x87, 0x00},
{0x8a, 0x22},
{0x8b, 0x22},
{0x19, 0xf1},
{0x29, 0x01},
{0xfd, 0x01},
{0x9d, 0x16},
{0xa0, 0x29},
{0xa1, 0x04},
{0xad, 0x62},
{0xae, 0x00},
{0xaf, 0x85},
{0xb1, 0x01},
{0x8e, 0x06},
{0x8f, 0x40},
{0x90, 0x04},
{0x91, 0xb0},
{0x45, 0x01},
{0x46, 0x00},
{0x47, 0x6c},
{0x48, 0x03},
{0x49, 0x8b},
{0x4a, 0x00},
{0x4b, 0x07},
{0x4c, 0x04},
{0x4d, 0xb7},
{0xf0, 0x40},
{0xf1, 0x40},
{0xf2, 0x40},
{0xf3, 0x40},
{0x3f, 0x00},
{0xfd, 0x01},
{0x05, 0x00},
{0x06, 0xa6},
{0xfd, 0x01},
};
static const char * const ov02a10_test_pattern_menu[] = {
"Disabled",
"Eight Vertical Colour Bars",
};
static const s64 link_freq_menu_items[] = {
OV02A10_LINK_FREQ_390MHZ,
};
static u64 to_pixel_rate(u32 f_index)
{
u64 pixel_rate = link_freq_menu_items[f_index] * 2 * OV02A10_DATA_LANES;
do_div(pixel_rate, OV02A10_BITS_PER_SAMPLE);
return pixel_rate;
}
static const struct ov02a10_mode supported_modes[] = {
{
.width = 1600,
.height = 1200,
.exp_def = 0x01ae,
.hts_def = 0x03a6,
.vts_def = 0x056e,
.reg_list = {
.num_of_regs = ARRAY_SIZE(ov02a10_1600x1200_regs),
.regs = ov02a10_1600x1200_regs,
},
},
};
static int ov02a10_write_array(struct ov02a10 *ov02a10,
const struct ov02a10_reg_list *r_list)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
unsigned int i;
int ret;
for (i = 0; i < r_list->num_of_regs; i++) {
ret = i2c_smbus_write_byte_data(client, r_list->regs[i].addr,
r_list->regs[i].val);
if (ret < 0)
return ret;
}
return 0;
}
static void ov02a10_fill_fmt(const struct ov02a10_mode *mode,
struct v4l2_mbus_framefmt *fmt)
{
fmt->width = mode->width;
fmt->height = mode->height;
fmt->field = V4L2_FIELD_NONE;
}
static int ov02a10_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct ov02a10 *ov02a10 = to_ov02a10(sd);
struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format;
struct v4l2_mbus_framefmt *frame_fmt;
int ret = 0;
mutex_lock(&ov02a10->mutex);
if (ov02a10->streaming && fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
ret = -EBUSY;
goto out_unlock;
}
/* Only one sensor mode supported */
mbus_fmt->code = ov02a10->fmt.code;
ov02a10_fill_fmt(ov02a10->cur_mode, mbus_fmt);
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
frame_fmt = v4l2_subdev_get_try_format(sd, sd_state, 0);
else
frame_fmt = &ov02a10->fmt;
*frame_fmt = *mbus_fmt;
out_unlock:
mutex_unlock(&ov02a10->mutex);
return ret;
}
static int ov02a10_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct ov02a10 *ov02a10 = to_ov02a10(sd);
struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format;
mutex_lock(&ov02a10->mutex);
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
fmt->format = *v4l2_subdev_get_try_format(sd, sd_state,
fmt->pad);
} else {
fmt->format = ov02a10->fmt;
mbus_fmt->code = ov02a10->fmt.code;
ov02a10_fill_fmt(ov02a10->cur_mode, mbus_fmt);
}
mutex_unlock(&ov02a10->mutex);
return 0;
}
static int ov02a10_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
struct ov02a10 *ov02a10 = to_ov02a10(sd);
if (code->index != 0)
return -EINVAL;
code->code = ov02a10->fmt.code;
return 0;
}
static int ov02a10_enum_frame_sizes(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_size_enum *fse)
{
if (fse->index >= ARRAY_SIZE(supported_modes))
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 ov02a10_check_sensor_id(struct ov02a10 *ov02a10)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
u16 chip_id;
int ret;
/* Validate the chip ID */
ret = i2c_smbus_read_word_swapped(client, OV02A10_REG_CHIP_ID);
if (ret < 0)
return ret;
chip_id = le16_to_cpu((__force __le16)ret);
if ((chip_id & OV02A10_ID_MASK) != OV02A10_ID) {
dev_err(&client->dev, "unexpected sensor id(0x%04x)\n", chip_id);
return -EINVAL;
}
return 0;
}
static int ov02a10_power_on(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ov02a10 *ov02a10 = to_ov02a10(sd);
int ret;
gpiod_set_value_cansleep(ov02a10->rst_gpio, 1);
gpiod_set_value_cansleep(ov02a10->pd_gpio, 1);
ret = clk_prepare_enable(ov02a10->eclk);
if (ret < 0) {
dev_err(dev, "failed to enable eclk\n");
return ret;
}
ret = regulator_bulk_enable(ARRAY_SIZE(ov02a10_supply_names),
ov02a10->supplies);
if (ret < 0) {
dev_err(dev, "failed to enable regulators\n");
goto disable_clk;
}
usleep_range(5000, 6000);
gpiod_set_value_cansleep(ov02a10->pd_gpio, 0);
usleep_range(5000, 6000);
gpiod_set_value_cansleep(ov02a10->rst_gpio, 0);
usleep_range(5000, 6000);
ret = ov02a10_check_sensor_id(ov02a10);
if (ret)
goto disable_regulator;
return 0;
disable_regulator:
regulator_bulk_disable(ARRAY_SIZE(ov02a10_supply_names),
ov02a10->supplies);
disable_clk:
clk_disable_unprepare(ov02a10->eclk);
return ret;
}
static int ov02a10_power_off(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ov02a10 *ov02a10 = to_ov02a10(sd);
gpiod_set_value_cansleep(ov02a10->rst_gpio, 1);
clk_disable_unprepare(ov02a10->eclk);
gpiod_set_value_cansleep(ov02a10->pd_gpio, 1);
regulator_bulk_disable(ARRAY_SIZE(ov02a10_supply_names),
ov02a10->supplies);
return 0;
}
static int __ov02a10_start_stream(struct ov02a10 *ov02a10)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
const struct ov02a10_reg_list *reg_list;
int ret;
/* Apply default values of current mode */
reg_list = &ov02a10->cur_mode->reg_list;
ret = ov02a10_write_array(ov02a10, reg_list);
if (ret)
return ret;
/* Apply customized values from user */
ret = __v4l2_ctrl_handler_setup(ov02a10->subdev.ctrl_handler);
if (ret)
return ret;
/* Set orientation to 180 degree */
if (ov02a10->upside_down) {
ret = i2c_smbus_write_byte_data(client, REG_MIRROR_FLIP_CONTROL,
REG_MIRROR_FLIP_ENABLE);
if (ret < 0) {
dev_err(&client->dev, "failed to set orientation\n");
return ret;
}
ret = i2c_smbus_write_byte_data(client, REG_GLOBAL_EFFECTIVE,
REG_ENABLE);
if (ret < 0)
return ret;
}
/* Set MIPI TX speed according to DT property */
if (ov02a10->mipi_clock_voltage != OV02A10_MIPI_TX_SPEED_DEFAULT) {
ret = i2c_smbus_write_byte_data(client, TX_SPEED_AREA_SEL,
ov02a10->mipi_clock_voltage);
if (ret < 0)
return ret;
}
/* Set stream on register */
return i2c_smbus_write_byte_data(client, REG_SC_CTRL_MODE,
SC_CTRL_MODE_STREAMING);
}
static int __ov02a10_stop_stream(struct ov02a10 *ov02a10)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
return i2c_smbus_write_byte_data(client, REG_SC_CTRL_MODE,
SC_CTRL_MODE_STANDBY);
}
static int ov02a10_entity_init_cfg(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state)
{
struct v4l2_subdev_format fmt = {
.which = V4L2_SUBDEV_FORMAT_TRY,
.format = {
.width = 1600,
.height = 1200,
}
};
ov02a10_set_fmt(sd, sd_state, &fmt);
return 0;
}
static int ov02a10_s_stream(struct v4l2_subdev *sd, int on)
{
struct ov02a10 *ov02a10 = to_ov02a10(sd);
struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
int ret;
mutex_lock(&ov02a10->mutex);
if (ov02a10->streaming == on) {
ret = 0;
goto unlock_and_return;
}
if (on) {
ret = pm_runtime_resume_and_get(&client->dev);
if (ret < 0)
goto unlock_and_return;
ret = __ov02a10_start_stream(ov02a10);
if (ret) {
__ov02a10_stop_stream(ov02a10);
ov02a10->streaming = !on;
goto err_rpm_put;
}
} else {
__ov02a10_stop_stream(ov02a10);
pm_runtime_put(&client->dev);
}
ov02a10->streaming = on;
mutex_unlock(&ov02a10->mutex);
return 0;
err_rpm_put:
pm_runtime_put(&client->dev);
unlock_and_return:
mutex_unlock(&ov02a10->mutex);
return ret;
}
static const struct dev_pm_ops ov02a10_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
pm_runtime_force_resume)
SET_RUNTIME_PM_OPS(ov02a10_power_off, ov02a10_power_on, NULL)
};
static int ov02a10_set_exposure(struct ov02a10 *ov02a10, int val)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
int ret;
ret = i2c_smbus_write_byte_data(client, REG_PAGE_SWITCH, REG_ENABLE);
if (ret < 0)
return ret;
ret = i2c_smbus_write_byte_data(client, OV02A10_REG_EXPOSURE_H,
val >> OV02A10_EXP_SHIFT);
if (ret < 0)
return ret;
ret = i2c_smbus_write_byte_data(client, OV02A10_REG_EXPOSURE_L, val);
if (ret < 0)
return ret;
return i2c_smbus_write_byte_data(client, REG_GLOBAL_EFFECTIVE,
REG_ENABLE);
}
static int ov02a10_set_gain(struct ov02a10 *ov02a10, int val)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
int ret;
ret = i2c_smbus_write_byte_data(client, REG_PAGE_SWITCH, REG_ENABLE);
if (ret < 0)
return ret;
ret = i2c_smbus_write_byte_data(client, OV02A10_REG_GAIN, val);
if (ret < 0)
return ret;
return i2c_smbus_write_byte_data(client, REG_GLOBAL_EFFECTIVE,
REG_ENABLE);
}
static int ov02a10_set_vblank(struct ov02a10 *ov02a10, int val)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
u32 vts = val + ov02a10->cur_mode->height - OV02A10_BASE_LINES;
int ret;
ret = i2c_smbus_write_byte_data(client, REG_PAGE_SWITCH, REG_ENABLE);
if (ret < 0)
return ret;
ret = i2c_smbus_write_byte_data(client, OV02A10_REG_VTS_H,
vts >> OV02A10_VTS_SHIFT);
if (ret < 0)
return ret;
ret = i2c_smbus_write_byte_data(client, OV02A10_REG_VTS_L, vts);
if (ret < 0)
return ret;
return i2c_smbus_write_byte_data(client, REG_GLOBAL_EFFECTIVE,
REG_ENABLE);
}
static int ov02a10_set_test_pattern(struct ov02a10 *ov02a10, int pattern)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
int ret;
ret = i2c_smbus_write_byte_data(client, REG_PAGE_SWITCH, REG_ENABLE);
if (ret < 0)
return ret;
ret = i2c_smbus_write_byte_data(client, OV02A10_REG_TEST_PATTERN,
pattern);
if (ret < 0)
return ret;
ret = i2c_smbus_write_byte_data(client, REG_GLOBAL_EFFECTIVE,
REG_ENABLE);
if (ret < 0)
return ret;
return i2c_smbus_write_byte_data(client, REG_SC_CTRL_MODE,
SC_CTRL_MODE_STREAMING);
}
static int ov02a10_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov02a10 *ov02a10 = container_of(ctrl->handler,
struct ov02a10, ctrl_handler);
struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
s64 max_expo;
int ret;
/* Propagate change of current control to all related controls */
if (ctrl->id == V4L2_CID_VBLANK) {
/* Update max exposure while meeting expected vblanking */
max_expo = ov02a10->cur_mode->height + ctrl->val -
OV02A10_EXPOSURE_MAX_MARGIN;
__v4l2_ctrl_modify_range(ov02a10->exposure,
ov02a10->exposure->minimum, max_expo,
ov02a10->exposure->step,
ov02a10->exposure->default_value);
}
/* V4L2 controls values will be applied only when power is already up */
if (!pm_runtime_get_if_in_use(&client->dev))
return 0;
switch (ctrl->id) {
case V4L2_CID_EXPOSURE:
ret = ov02a10_set_exposure(ov02a10, ctrl->val);
break;
case V4L2_CID_ANALOGUE_GAIN:
ret = ov02a10_set_gain(ov02a10, ctrl->val);
break;
case V4L2_CID_VBLANK:
ret = ov02a10_set_vblank(ov02a10, ctrl->val);
break;
case V4L2_CID_TEST_PATTERN:
ret = ov02a10_set_test_pattern(ov02a10, ctrl->val);
break;
default:
ret = -EINVAL;
break;
}
pm_runtime_put(&client->dev);
return ret;
}
static const struct v4l2_subdev_video_ops ov02a10_video_ops = {
.s_stream = ov02a10_s_stream,
};
static const struct v4l2_subdev_pad_ops ov02a10_pad_ops = {
.init_cfg = ov02a10_entity_init_cfg,
.enum_mbus_code = ov02a10_enum_mbus_code,
.enum_frame_size = ov02a10_enum_frame_sizes,
.get_fmt = ov02a10_get_fmt,
.set_fmt = ov02a10_set_fmt,
};
static const struct v4l2_subdev_ops ov02a10_subdev_ops = {
.video = &ov02a10_video_ops,
.pad = &ov02a10_pad_ops,
};
static const struct media_entity_operations ov02a10_subdev_entity_ops = {
.link_validate = v4l2_subdev_link_validate,
};
static const struct v4l2_ctrl_ops ov02a10_ctrl_ops = {
.s_ctrl = ov02a10_set_ctrl,
};
static int ov02a10_initialize_controls(struct ov02a10 *ov02a10)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev);
const struct ov02a10_mode *mode;
struct v4l2_ctrl_handler *handler;
struct v4l2_ctrl *ctrl;
s64 exposure_max;
s64 vblank_def;
s64 pixel_rate;
s64 h_blank;
int ret;
handler = &ov02a10->ctrl_handler;
mode = ov02a10->cur_mode;
ret = v4l2_ctrl_handler_init(handler, 7);
if (ret)
return ret;
handler->lock = &ov02a10->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;
pixel_rate = to_pixel_rate(0);
v4l2_ctrl_new_std(handler, NULL, V4L2_CID_PIXEL_RATE, 0, pixel_rate, 1,
pixel_rate);
h_blank = mode->hts_def - mode->width;
v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK, h_blank, h_blank, 1,
h_blank);
vblank_def = mode->vts_def - mode->height;
v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops, V4L2_CID_VBLANK,
vblank_def, OV02A10_VTS_MAX - mode->height, 1,
vblank_def);
exposure_max = mode->vts_def - 4;
ov02a10->exposure = v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops,
V4L2_CID_EXPOSURE,
OV02A10_EXPOSURE_MIN,
exposure_max,
OV02A10_EXPOSURE_STEP,
mode->exp_def);
v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops,
V4L2_CID_ANALOGUE_GAIN, OV02A10_GAIN_MIN,
OV02A10_GAIN_MAX, OV02A10_GAIN_STEP,
OV02A10_GAIN_DEFAULT);
v4l2_ctrl_new_std_menu_items(handler, &ov02a10_ctrl_ops,
V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(ov02a10_test_pattern_menu) - 1,
0, 0, ov02a10_test_pattern_menu);
if (handler->error) {
ret = handler->error;
dev_err(&client->dev, "failed to init controls(%d)\n", ret);
goto err_free_handler;
}
ov02a10->subdev.ctrl_handler = handler;
return 0;
err_free_handler:
v4l2_ctrl_handler_free(handler);
return ret;
}
static int ov02a10_check_hwcfg(struct device *dev, struct ov02a10 *ov02a10)
{
struct fwnode_handle *ep;
struct fwnode_handle *fwnode = dev_fwnode(dev);
struct v4l2_fwnode_endpoint bus_cfg = {
.bus_type = V4L2_MBUS_CSI2_DPHY,
};
unsigned int i, j;
u32 clk_volt;
int ret;
if (!fwnode)
return -EINVAL;
ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
if (!ep)
return -ENXIO;
ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
fwnode_handle_put(ep);
if (ret)
return ret;
/* Optional indication of MIPI clock voltage unit */
ret = fwnode_property_read_u32(ep, "ovti,mipi-clock-voltage",
&clk_volt);
if (!ret)
ov02a10->mipi_clock_voltage = clk_volt;
for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) {
for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) {
if (link_freq_menu_items[i] ==
bus_cfg.link_frequencies[j])
break;
}
if (j == bus_cfg.nr_of_link_frequencies) {
dev_err(dev, "no link frequency %lld supported\n",
link_freq_menu_items[i]);
ret = -EINVAL;
break;
}
}
v4l2_fwnode_endpoint_free(&bus_cfg);
return ret;
}
static int ov02a10_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct ov02a10 *ov02a10;
unsigned int i;
unsigned int rotation;
int ret;
ov02a10 = devm_kzalloc(dev, sizeof(*ov02a10), GFP_KERNEL);
if (!ov02a10)
return -ENOMEM;
ret = ov02a10_check_hwcfg(dev, ov02a10);
if (ret)
return dev_err_probe(dev, ret,
"failed to check HW configuration\n");
v4l2_i2c_subdev_init(&ov02a10->subdev, client, &ov02a10_subdev_ops);
ov02a10->mipi_clock_voltage = OV02A10_MIPI_TX_SPEED_DEFAULT;
ov02a10->fmt.code = MEDIA_BUS_FMT_SBGGR10_1X10;
/* Optional indication of physical rotation of sensor */
rotation = 0;
device_property_read_u32(dev, "rotation", &rotation);
if (rotation == 180) {
ov02a10->upside_down = true;
ov02a10->fmt.code = MEDIA_BUS_FMT_SRGGB10_1X10;
}
ov02a10->eclk = devm_clk_get(dev, "eclk");
if (IS_ERR(ov02a10->eclk))
return dev_err_probe(dev, PTR_ERR(ov02a10->eclk),
"failed to get eclk\n");
ret = device_property_read_u32(dev, "clock-frequency",
&ov02a10->eclk_freq);
if (ret < 0)
return dev_err_probe(dev, ret,
"failed to get eclk frequency\n");
ret = clk_set_rate(ov02a10->eclk, ov02a10->eclk_freq);
if (ret < 0)
return dev_err_probe(dev, ret,
"failed to set eclk frequency (24MHz)\n");
if (clk_get_rate(ov02a10->eclk) != OV02A10_ECLK_FREQ)
dev_warn(dev, "eclk mismatched, mode is based on 24MHz\n");
ov02a10->pd_gpio = devm_gpiod_get(dev, "powerdown", GPIOD_OUT_HIGH);
if (IS_ERR(ov02a10->pd_gpio))
return dev_err_probe(dev, PTR_ERR(ov02a10->pd_gpio),
"failed to get powerdown-gpios\n");
ov02a10->rst_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(ov02a10->rst_gpio))
return dev_err_probe(dev, PTR_ERR(ov02a10->rst_gpio),
"failed to get reset-gpios\n");
for (i = 0; i < ARRAY_SIZE(ov02a10_supply_names); i++)
ov02a10->supplies[i].supply = ov02a10_supply_names[i];
ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ov02a10_supply_names),
ov02a10->supplies);
if (ret)
return dev_err_probe(dev, ret, "failed to get regulators\n");
mutex_init(&ov02a10->mutex);
/* Set default mode */
ov02a10->cur_mode = &supported_modes[0];
ret = ov02a10_initialize_controls(ov02a10);
if (ret) {
dev_err_probe(dev, ret, "failed to initialize controls\n");
goto err_destroy_mutex;
}
/* Initialize subdev */
ov02a10->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
ov02a10->subdev.entity.ops = &ov02a10_subdev_entity_ops;
ov02a10->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR;
ov02a10->pad.flags = MEDIA_PAD_FL_SOURCE;
ret = media_entity_pads_init(&ov02a10->subdev.entity, 1, &ov02a10->pad);
if (ret < 0) {
dev_err_probe(dev, ret, "failed to initialize entity pads\n");
goto err_free_handler;
}
pm_runtime_enable(dev);
if (!pm_runtime_enabled(dev)) {
ret = ov02a10_power_on(dev);
if (ret < 0) {
dev_err_probe(dev, ret, "failed to power on\n");
goto err_clean_entity;
}
}
ret = v4l2_async_register_subdev(&ov02a10->subdev);
if (ret) {
dev_err_probe(dev, ret, "failed to register V4L2 subdev\n");
goto err_power_off;
}
return 0;
err_power_off:
if (pm_runtime_enabled(dev))
pm_runtime_disable(dev);
else
ov02a10_power_off(dev);
err_clean_entity:
media_entity_cleanup(&ov02a10->subdev.entity);
err_free_handler:
v4l2_ctrl_handler_free(ov02a10->subdev.ctrl_handler);
err_destroy_mutex:
mutex_destroy(&ov02a10->mutex);
return ret;
}
static void ov02a10_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ov02a10 *ov02a10 = to_ov02a10(sd);
v4l2_async_unregister_subdev(sd);
media_entity_cleanup(&sd->entity);
v4l2_ctrl_handler_free(sd->ctrl_handler);
pm_runtime_disable(&client->dev);
if (!pm_runtime_status_suspended(&client->dev))
ov02a10_power_off(&client->dev);
pm_runtime_set_suspended(&client->dev);
mutex_destroy(&ov02a10->mutex);
}
static const struct of_device_id ov02a10_of_match[] = {
{ .compatible = "ovti,ov02a10" },
{}
};
MODULE_DEVICE_TABLE(of, ov02a10_of_match);
static struct i2c_driver ov02a10_i2c_driver = {
.driver = {
.name = "ov02a10",
.pm = &ov02a10_pm_ops,
.of_match_table = ov02a10_of_match,
},
.probe_new = &ov02a10_probe,
.remove = &ov02a10_remove,
};
module_i2c_driver(ov02a10_i2c_driver);
MODULE_AUTHOR("Dongchun Zhu <dongchun.zhu@mediatek.com>");
MODULE_DESCRIPTION("OmniVision OV02A10 sensor driver");
MODULE_LICENSE("GPL v2");