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linux-zen-server/drivers/media/i2c/ov4689.c

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Initial commit
2023-08-30 17:53:23 +02:00
// SPDX-License-Identifier: GPL-2.0
/*
* ov4689 driver
*
* Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd.
* Copyright (C) 2022 Mikhail Rudenko
*/
#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/regulator/consumer.h>
#include <media/media-entity.h>
#include <media/v4l2-async.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-subdev.h>
#include <media/v4l2-fwnode.h>
#define CHIP_ID 0x004688
#define OV4689_REG_CHIP_ID 0x300a
#define OV4689_XVCLK_FREQ 24000000
#define OV4689_REG_CTRL_MODE 0x0100
#define OV4689_MODE_SW_STANDBY 0x0
#define OV4689_MODE_STREAMING BIT(0)
#define OV4689_REG_EXPOSURE 0x3500
#define OV4689_EXPOSURE_MIN 4
#define OV4689_EXPOSURE_STEP 1
#define OV4689_VTS_MAX 0x7fff
#define OV4689_REG_GAIN_H 0x3508
#define OV4689_REG_GAIN_L 0x3509
#define OV4689_GAIN_H_MASK 0x07
#define OV4689_GAIN_H_SHIFT 8
#define OV4689_GAIN_L_MASK 0xff
#define OV4689_GAIN_STEP 1
#define OV4689_GAIN_DEFAULT 0x80
#define OV4689_REG_TEST_PATTERN 0x5040
#define OV4689_TEST_PATTERN_ENABLE 0x80
#define OV4689_TEST_PATTERN_DISABLE 0x0
#define OV4689_REG_VTS 0x380e
#define REG_NULL 0xFFFF
#define OV4689_REG_VALUE_08BIT 1
#define OV4689_REG_VALUE_16BIT 2
#define OV4689_REG_VALUE_24BIT 3
#define OV4689_LANES 4
static const char *const ov4689_supply_names[] = {
"avdd", /* Analog power */
"dovdd", /* Digital I/O power */
"dvdd", /* Digital core power */
};
struct regval {
u16 addr;
u8 val;
};
enum ov4689_mode_id {
OV4689_MODE_2688_1520 = 0,
OV4689_NUM_MODES,
};
struct ov4689_mode {
enum ov4689_mode_id id;
u32 width;
u32 height;
u32 max_fps;
u32 hts_def;
u32 vts_def;
u32 exp_def;
u32 pixel_rate;
u32 sensor_width;
u32 sensor_height;
u32 crop_top;
u32 crop_left;
const struct regval *reg_list;
};
struct ov4689 {
struct i2c_client *client;
struct clk *xvclk;
struct gpio_desc *reset_gpio;
struct gpio_desc *pwdn_gpio;
struct regulator_bulk_data supplies[ARRAY_SIZE(ov4689_supply_names)];
struct v4l2_subdev subdev;
struct media_pad pad;
u32 clock_rate;
struct mutex mutex; /* lock to protect streaming, ctrls and cur_mode */
bool streaming;
struct v4l2_ctrl_handler ctrl_handler;
struct v4l2_ctrl *exposure;
const struct ov4689_mode *cur_mode;
};
#define to_ov4689(sd) container_of(sd, struct ov4689, subdev)
struct ov4689_gain_range {
u32 logical_min;
u32 logical_max;
u32 offset;
u32 divider;
u32 physical_min;
u32 physical_max;
};
/*
* Xclk 24Mhz
* max_framerate 30fps
* mipi_datarate per lane 1008Mbps
*/
static const struct regval ov4689_2688x1520_regs[] = {
{0x0103, 0x01}, {0x3638, 0x00}, {0x0300, 0x00},
{0x0302, 0x2a}, {0x0303, 0x00}, {0x0304, 0x03},
{0x030b, 0x00}, {0x030d, 0x1e}, {0x030e, 0x04},
{0x030f, 0x01}, {0x0312, 0x01}, {0x031e, 0x00},
{0x3000, 0x20}, {0x3002, 0x00}, {0x3018, 0x72},
{0x3020, 0x93}, {0x3021, 0x03}, {0x3022, 0x01},
{0x3031, 0x0a}, {0x303f, 0x0c}, {0x3305, 0xf1},
{0x3307, 0x04}, {0x3309, 0x29}, {0x3500, 0x00},
{0x3501, 0x60}, {0x3502, 0x00}, {0x3503, 0x04},
{0x3504, 0x00}, {0x3505, 0x00}, {0x3506, 0x00},
{0x3507, 0x00}, {0x3508, 0x00}, {0x3509, 0x80},
{0x350a, 0x00}, {0x350b, 0x00}, {0x350c, 0x00},
{0x350d, 0x00}, {0x350e, 0x00}, {0x350f, 0x80},
{0x3510, 0x00}, {0x3511, 0x00}, {0x3512, 0x00},
{0x3513, 0x00}, {0x3514, 0x00}, {0x3515, 0x80},
{0x3516, 0x00}, {0x3517, 0x00}, {0x3518, 0x00},
{0x3519, 0x00}, {0x351a, 0x00}, {0x351b, 0x80},
{0x351c, 0x00}, {0x351d, 0x00}, {0x351e, 0x00},
{0x351f, 0x00}, {0x3520, 0x00}, {0x3521, 0x80},
{0x3522, 0x08}, {0x3524, 0x08}, {0x3526, 0x08},
{0x3528, 0x08}, {0x352a, 0x08}, {0x3602, 0x00},
{0x3603, 0x40}, {0x3604, 0x02}, {0x3605, 0x00},
{0x3606, 0x00}, {0x3607, 0x00}, {0x3609, 0x12},
{0x360a, 0x40}, {0x360c, 0x08}, {0x360f, 0xe5},
{0x3608, 0x8f}, {0x3611, 0x00}, {0x3613, 0xf7},
{0x3616, 0x58}, {0x3619, 0x99}, {0x361b, 0x60},
{0x361c, 0x7a}, {0x361e, 0x79}, {0x361f, 0x02},
{0x3632, 0x00}, {0x3633, 0x10}, {0x3634, 0x10},
{0x3635, 0x10}, {0x3636, 0x15}, {0x3646, 0x86},
{0x364a, 0x0b}, {0x3700, 0x17}, {0x3701, 0x22},
{0x3703, 0x10}, {0x370a, 0x37}, {0x3705, 0x00},
{0x3706, 0x63}, {0x3709, 0x3c}, {0x370b, 0x01},
{0x370c, 0x30}, {0x3710, 0x24}, {0x3711, 0x0c},
{0x3716, 0x00}, {0x3720, 0x28}, {0x3729, 0x7b},
{0x372a, 0x84}, {0x372b, 0xbd}, {0x372c, 0xbc},
{0x372e, 0x52}, {0x373c, 0x0e}, {0x373e, 0x33},
{0x3743, 0x10}, {0x3744, 0x88}, {0x3745, 0xc0},
{0x374a, 0x43}, {0x374c, 0x00}, {0x374e, 0x23},
{0x3751, 0x7b}, {0x3752, 0x84}, {0x3753, 0xbd},
{0x3754, 0xbc}, {0x3756, 0x52}, {0x375c, 0x00},
{0x3760, 0x00}, {0x3761, 0x00}, {0x3762, 0x00},
{0x3763, 0x00}, {0x3764, 0x00}, {0x3767, 0x04},
{0x3768, 0x04}, {0x3769, 0x08}, {0x376a, 0x08},
{0x376b, 0x20}, {0x376c, 0x00}, {0x376d, 0x00},
{0x376e, 0x00}, {0x3773, 0x00}, {0x3774, 0x51},
{0x3776, 0xbd}, {0x3777, 0xbd}, {0x3781, 0x18},
{0x3783, 0x25}, {0x3798, 0x1b}, {0x3800, 0x00},
{0x3801, 0x08}, {0x3802, 0x00}, {0x3803, 0x04},
{0x3804, 0x0a}, {0x3805, 0x97}, {0x3806, 0x05},
{0x3807, 0xfb}, {0x3808, 0x0a}, {0x3809, 0x80},
{0x380a, 0x05}, {0x380b, 0xf0}, {0x380c, 0x0a},
{0x380d, 0x0e}, {0x380e, 0x06}, {0x380f, 0x12},
{0x3810, 0x00}, {0x3811, 0x08}, {0x3812, 0x00},
{0x3813, 0x04}, {0x3814, 0x01}, {0x3815, 0x01},
{0x3819, 0x01}, {0x3820, 0x00}, {0x3821, 0x06},
{0x3829, 0x00}, {0x382a, 0x01}, {0x382b, 0x01},
{0x382d, 0x7f}, {0x3830, 0x04}, {0x3836, 0x01},
{0x3837, 0x00}, {0x3841, 0x02}, {0x3846, 0x08},
{0x3847, 0x07}, {0x3d85, 0x36}, {0x3d8c, 0x71},
{0x3d8d, 0xcb}, {0x3f0a, 0x00}, {0x4000, 0xf1},
{0x4001, 0x40}, {0x4002, 0x04}, {0x4003, 0x14},
{0x400e, 0x00}, {0x4011, 0x00}, {0x401a, 0x00},
{0x401b, 0x00}, {0x401c, 0x00}, {0x401d, 0x00},
{0x401f, 0x00}, {0x4020, 0x00}, {0x4021, 0x10},
{0x4022, 0x07}, {0x4023, 0xcf}, {0x4024, 0x09},
{0x4025, 0x60}, {0x4026, 0x09}, {0x4027, 0x6f},
{0x4028, 0x00}, {0x4029, 0x02}, {0x402a, 0x06},
{0x402b, 0x04}, {0x402c, 0x02}, {0x402d, 0x02},
{0x402e, 0x0e}, {0x402f, 0x04}, {0x4302, 0xff},
{0x4303, 0xff}, {0x4304, 0x00}, {0x4305, 0x00},
{0x4306, 0x00}, {0x4308, 0x02}, {0x4500, 0x6c},
{0x4501, 0xc4}, {0x4502, 0x40}, {0x4503, 0x01},
{0x4601, 0xa7}, {0x4800, 0x04}, {0x4813, 0x08},
{0x481f, 0x40}, {0x4829, 0x78}, {0x4837, 0x10},
{0x4b00, 0x2a}, {0x4b0d, 0x00}, {0x4d00, 0x04},
{0x4d01, 0x42}, {0x4d02, 0xd1}, {0x4d03, 0x93},
{0x4d04, 0xf5}, {0x4d05, 0xc1}, {0x5000, 0xf3},
{0x5001, 0x11}, {0x5004, 0x00}, {0x500a, 0x00},
{0x500b, 0x00}, {0x5032, 0x00}, {0x5040, 0x00},
{0x5050, 0x0c}, {0x5500, 0x00}, {0x5501, 0x10},
{0x5502, 0x01}, {0x5503, 0x0f}, {0x8000, 0x00},
{0x8001, 0x00}, {0x8002, 0x00}, {0x8003, 0x00},
{0x8004, 0x00}, {0x8005, 0x00}, {0x8006, 0x00},
{0x8007, 0x00}, {0x8008, 0x00}, {0x3638, 0x00},
{REG_NULL, 0x00},
};
static const struct ov4689_mode supported_modes[] = {
{
.id = OV4689_MODE_2688_1520,
.width = 2688,
.height = 1520,
.sensor_width = 2720,
.sensor_height = 1536,
.crop_top = 8,
.crop_left = 16,
.max_fps = 30,
.exp_def = 1536,
.hts_def = 4 * 2574,
.vts_def = 1554,
.pixel_rate = 480000000,
.reg_list = ov4689_2688x1520_regs,
},
};
static const u64 link_freq_menu_items[] = { 504000000 };
static const char *const ov4689_test_pattern_menu[] = {
"Disabled",
"Vertical Color Bar Type 1",
"Vertical Color Bar Type 2",
"Vertical Color Bar Type 3",
"Vertical Color Bar Type 4"
};
/*
* These coefficients are based on those used in Rockchip's camera
* engine, with minor tweaks for continuity.
*/
static const struct ov4689_gain_range ov4689_gain_ranges[] = {
{
.logical_min = 0,
.logical_max = 255,
.offset = 0,
.divider = 1,
.physical_min = 0,
.physical_max = 255,
},
{
.logical_min = 256,
.logical_max = 511,
.offset = 252,
.divider = 2,
.physical_min = 376,
.physical_max = 504,
},
{
.logical_min = 512,
.logical_max = 1023,
.offset = 758,
.divider = 4,
.physical_min = 884,
.physical_max = 1012,
},
{
.logical_min = 1024,
.logical_max = 2047,
.offset = 1788,
.divider = 8,
.physical_min = 1912,
.physical_max = 2047,
},
};
/* Write registers up to 4 at a time */
static int ov4689_write_reg(struct i2c_client *client, u16 reg, u32 len,
u32 val)
{
u32 buf_i, val_i;
__be32 val_be;
u8 *val_p;
u8 buf[6];
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 ov4689_write_array(struct i2c_client *client,
const struct regval *regs)
{
int ret = 0;
u32 i;
for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++)
ret = ov4689_write_reg(client, regs[i].addr,
OV4689_REG_VALUE_08BIT, regs[i].val);
return ret;
}
/* Read registers up to 4 at a time */
static int ov4689_read_reg(struct i2c_client *client, u16 reg, unsigned int len,
u32 *val)
{
__be16 reg_addr_be = cpu_to_be16(reg);
struct i2c_msg msgs[2];
__be32 data_be = 0;
u8 *data_be_p;
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 *)&reg_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 void ov4689_fill_fmt(const struct ov4689_mode *mode,
struct v4l2_mbus_framefmt *fmt)
{
fmt->code = MEDIA_BUS_FMT_SBGGR10_1X10;
fmt->width = mode->width;
fmt->height = mode->height;
fmt->field = V4L2_FIELD_NONE;
}
static int ov4689_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format;
struct ov4689 *ov4689 = to_ov4689(sd);
/* only one mode supported for now */
ov4689_fill_fmt(ov4689->cur_mode, mbus_fmt);
return 0;
}
static int ov4689_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format;
struct ov4689 *ov4689 = to_ov4689(sd);
/* only one mode supported for now */
ov4689_fill_fmt(ov4689->cur_mode, mbus_fmt);
return 0;
}
static int ov4689_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
if (code->index != 0)
return -EINVAL;
code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
return 0;
}
static int ov4689_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;
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 ov4689_enable_test_pattern(struct ov4689 *ov4689, u32 pattern)
{
u32 val;
if (pattern)
val = (pattern - 1) | OV4689_TEST_PATTERN_ENABLE;
else
val = OV4689_TEST_PATTERN_DISABLE;
return ov4689_write_reg(ov4689->client, OV4689_REG_TEST_PATTERN,
OV4689_REG_VALUE_08BIT, val);
}
static int ov4689_get_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
struct v4l2_subdev_selection *sel)
{
const struct ov4689_mode *mode = to_ov4689(sd)->cur_mode;
if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
return -EINVAL;
switch (sel->target) {
case V4L2_SEL_TGT_CROP_BOUNDS:
sel->r.top = 0;
sel->r.left = 0;
sel->r.width = mode->sensor_width;
sel->r.height = mode->sensor_height;
return 0;
case V4L2_SEL_TGT_CROP:
case V4L2_SEL_TGT_CROP_DEFAULT:
sel->r.top = mode->crop_top;
sel->r.left = mode->crop_left;
sel->r.width = mode->width;
sel->r.height = mode->height;
return 0;
}
return -EINVAL;
}
static int ov4689_s_stream(struct v4l2_subdev *sd, int on)
{
struct ov4689 *ov4689 = to_ov4689(sd);
struct i2c_client *client = ov4689->client;
int ret = 0;
mutex_lock(&ov4689->mutex);
on = !!on;
if (on == ov4689->streaming)
goto unlock_and_return;
if (on) {
ret = pm_runtime_resume_and_get(&client->dev);
if (ret < 0)
goto unlock_and_return;
ret = ov4689_write_array(ov4689->client,
ov4689->cur_mode->reg_list);
if (ret) {
pm_runtime_put(&client->dev);
goto unlock_and_return;
}
ret = __v4l2_ctrl_handler_setup(&ov4689->ctrl_handler);
if (ret) {
pm_runtime_put(&client->dev);
goto unlock_and_return;
}
ret = ov4689_write_reg(ov4689->client, OV4689_REG_CTRL_MODE,
OV4689_REG_VALUE_08BIT,
OV4689_MODE_STREAMING);
if (ret) {
pm_runtime_put(&client->dev);
goto unlock_and_return;
}
} else {
ov4689_write_reg(ov4689->client, OV4689_REG_CTRL_MODE,
OV4689_REG_VALUE_08BIT,
OV4689_MODE_SW_STANDBY);
pm_runtime_put(&client->dev);
}
ov4689->streaming = on;
unlock_and_return:
mutex_unlock(&ov4689->mutex);
return ret;
}
/* Calculate the delay in us by clock rate and clock cycles */
static inline u32 ov4689_cal_delay(struct ov4689 *ov4689, u32 cycles)
{
return DIV_ROUND_UP(cycles * 1000,
DIV_ROUND_UP(ov4689->clock_rate, 1000));
}
static int __maybe_unused ov4689_power_on(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct ov4689 *ov4689 = to_ov4689(sd);
u32 delay_us;
int ret;
ret = clk_prepare_enable(ov4689->xvclk);
if (ret < 0) {
dev_err(dev, "Failed to enable xvclk\n");
return ret;
}
gpiod_set_value_cansleep(ov4689->reset_gpio, 1);
ret = regulator_bulk_enable(ARRAY_SIZE(ov4689_supply_names),
ov4689->supplies);
if (ret < 0) {
dev_err(dev, "Failed to enable regulators\n");
goto disable_clk;
}
gpiod_set_value_cansleep(ov4689->reset_gpio, 0);
usleep_range(500, 1000);
gpiod_set_value_cansleep(ov4689->pwdn_gpio, 0);
/* 8192 cycles prior to first SCCB transaction */
delay_us = ov4689_cal_delay(ov4689, 8192);
usleep_range(delay_us, delay_us * 2);
return 0;
disable_clk:
clk_disable_unprepare(ov4689->xvclk);
return ret;
}
static int __maybe_unused ov4689_power_off(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct ov4689 *ov4689 = to_ov4689(sd);
gpiod_set_value_cansleep(ov4689->pwdn_gpio, 1);
clk_disable_unprepare(ov4689->xvclk);
gpiod_set_value_cansleep(ov4689->reset_gpio, 1);
regulator_bulk_disable(ARRAY_SIZE(ov4689_supply_names),
ov4689->supplies);
return 0;
}
static int ov4689_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
struct ov4689 *ov4689 = to_ov4689(sd);
struct v4l2_mbus_framefmt *try_fmt;
mutex_lock(&ov4689->mutex);
try_fmt = v4l2_subdev_get_try_format(sd, fh->state, 0);
/* Initialize try_fmt */
ov4689_fill_fmt(&supported_modes[OV4689_MODE_2688_1520], try_fmt);
mutex_unlock(&ov4689->mutex);
return 0;
}
static const struct dev_pm_ops ov4689_pm_ops = {
SET_RUNTIME_PM_OPS(ov4689_power_off, ov4689_power_on, NULL)
};
static const struct v4l2_subdev_internal_ops ov4689_internal_ops = {
.open = ov4689_open,
};
static const struct v4l2_subdev_video_ops ov4689_video_ops = {
.s_stream = ov4689_s_stream,
};
static const struct v4l2_subdev_pad_ops ov4689_pad_ops = {
.enum_mbus_code = ov4689_enum_mbus_code,
.enum_frame_size = ov4689_enum_frame_sizes,
.get_fmt = ov4689_get_fmt,
.set_fmt = ov4689_set_fmt,
.get_selection = ov4689_get_selection,
};
static const struct v4l2_subdev_ops ov4689_subdev_ops = {
.video = &ov4689_video_ops,
.pad = &ov4689_pad_ops,
};
/*
* Map userspace (logical) gain to sensor (physical) gain using
* ov4689_gain_ranges table.
*/
static int ov4689_map_gain(struct ov4689 *ov4689, int logical_gain, int *result)
{
const struct device *dev = &ov4689->client->dev;
const struct ov4689_gain_range *range;
unsigned int n;
for (n = 0; n < ARRAY_SIZE(ov4689_gain_ranges); n++) {
if (logical_gain >= ov4689_gain_ranges[n].logical_min &&
logical_gain <= ov4689_gain_ranges[n].logical_max)
break;
}
if (n == ARRAY_SIZE(ov4689_gain_ranges)) {
dev_warn_ratelimited(dev, "no mapping found for gain %d\n",
logical_gain);
return -EINVAL;
}
range = &ov4689_gain_ranges[n];
*result = clamp(range->offset + (logical_gain) / range->divider,
range->physical_min, range->physical_max);
return 0;
}
static int ov4689_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov4689 *ov4689 =
container_of(ctrl->handler, struct ov4689, ctrl_handler);
struct i2c_client *client = ov4689->client;
int sensor_gain;
s64 max_expo;
int ret;
/* Propagate change of current control to all related controls */
switch (ctrl->id) {
case V4L2_CID_VBLANK:
/* Update max exposure while meeting expected vblanking */
max_expo = ov4689->cur_mode->height + ctrl->val - 4;
__v4l2_ctrl_modify_range(ov4689->exposure,
ov4689->exposure->minimum, max_expo,
ov4689->exposure->step,
ov4689->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 = ov4689_write_reg(ov4689->client, OV4689_REG_EXPOSURE,
OV4689_REG_VALUE_24BIT, ctrl->val << 4);
break;
case V4L2_CID_ANALOGUE_GAIN:
ret = ov4689_map_gain(ov4689, ctrl->val, &sensor_gain);
ret = ret ?:
ov4689_write_reg(ov4689->client, OV4689_REG_GAIN_H,
OV4689_REG_VALUE_08BIT,
(sensor_gain >> OV4689_GAIN_H_SHIFT) &
OV4689_GAIN_H_MASK);
ret = ret ?:
ov4689_write_reg(ov4689->client, OV4689_REG_GAIN_L,
OV4689_REG_VALUE_08BIT,
sensor_gain & OV4689_GAIN_L_MASK);
break;
case V4L2_CID_VBLANK:
ret = ov4689_write_reg(ov4689->client, OV4689_REG_VTS,
OV4689_REG_VALUE_16BIT,
ctrl->val + ov4689->cur_mode->height);
break;
case V4L2_CID_TEST_PATTERN:
ret = ov4689_enable_test_pattern(ov4689, ctrl->val);
break;
default:
dev_warn(&client->dev, "%s Unhandled id:0x%x, val:0x%x\n",
__func__, ctrl->id, ctrl->val);
ret = -EINVAL;
break;
}
pm_runtime_put(&client->dev);
return ret;
}
static const struct v4l2_ctrl_ops ov4689_ctrl_ops = {
.s_ctrl = ov4689_set_ctrl,
};
static int ov4689_initialize_controls(struct ov4689 *ov4689)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov4689->subdev);
struct v4l2_fwnode_device_properties props;
struct v4l2_ctrl_handler *handler;
const struct ov4689_mode *mode;
s64 exposure_max, vblank_def;
struct v4l2_ctrl *ctrl;
s64 h_blank_def;
int ret;
handler = &ov4689->ctrl_handler;
mode = ov4689->cur_mode;
ret = v4l2_ctrl_handler_init(handler, 10);
if (ret)
return ret;
handler->lock = &ov4689->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,
mode->pixel_rate, 1, mode->pixel_rate);
h_blank_def = mode->hts_def - mode->width;
ctrl = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK, h_blank_def,
h_blank_def, 1, h_blank_def);
if (ctrl)
ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
vblank_def = mode->vts_def - mode->height;
v4l2_ctrl_new_std(handler, &ov4689_ctrl_ops, V4L2_CID_VBLANK,
vblank_def, OV4689_VTS_MAX - mode->height, 1,
vblank_def);
exposure_max = mode->vts_def - 4;
ov4689->exposure =
v4l2_ctrl_new_std(handler, &ov4689_ctrl_ops, V4L2_CID_EXPOSURE,
OV4689_EXPOSURE_MIN, exposure_max,
OV4689_EXPOSURE_STEP, mode->exp_def);
v4l2_ctrl_new_std(handler, &ov4689_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
ov4689_gain_ranges[0].logical_min,
ov4689_gain_ranges[ARRAY_SIZE(ov4689_gain_ranges) - 1]
.logical_max,
OV4689_GAIN_STEP, OV4689_GAIN_DEFAULT);
v4l2_ctrl_new_std_menu_items(handler, &ov4689_ctrl_ops,
V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(ov4689_test_pattern_menu) - 1,
0, 0, ov4689_test_pattern_menu);
if (handler->error) {
ret = handler->error;
dev_err(&ov4689->client->dev, "Failed to init controls(%d)\n",
ret);
goto err_free_handler;
}
ret = v4l2_fwnode_device_parse(&client->dev, &props);
if (ret)
goto err_free_handler;
ret = v4l2_ctrl_new_fwnode_properties(handler, &ov4689_ctrl_ops,
&props);
if (ret)
goto err_free_handler;
ov4689->subdev.ctrl_handler = handler;
return 0;
err_free_handler:
v4l2_ctrl_handler_free(handler);
return ret;
}
static int ov4689_check_sensor_id(struct ov4689 *ov4689,
struct i2c_client *client)
{
struct device *dev = &ov4689->client->dev;
u32 id = 0;
int ret;
ret = ov4689_read_reg(client, OV4689_REG_CHIP_ID,
OV4689_REG_VALUE_16BIT, &id);
if (ret) {
dev_err(dev, "Cannot read sensor ID\n");
return ret;
}
if (id != CHIP_ID) {
dev_err(dev, "Unexpected sensor ID %06x, expected %06x\n",
id, CHIP_ID);
return -ENODEV;
}
dev_info(dev, "Detected OV%06x sensor\n", CHIP_ID);
return 0;
}
static int ov4689_configure_regulators(struct ov4689 *ov4689)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(ov4689_supply_names); i++)
ov4689->supplies[i].supply = ov4689_supply_names[i];
return devm_regulator_bulk_get(&ov4689->client->dev,
ARRAY_SIZE(ov4689_supply_names),
ov4689->supplies);
}
static u64 ov4689_check_link_frequency(struct v4l2_fwnode_endpoint *ep)
{
const u64 *freqs = link_freq_menu_items;
unsigned int i, j;
for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) {
for (j = 0; j < ep->nr_of_link_frequencies; j++)
if (freqs[i] == ep->link_frequencies[j])
return freqs[i];
}
return 0;
}
static int ov4689_check_hwcfg(struct device *dev)
{
struct fwnode_handle *fwnode = dev_fwnode(dev);
struct v4l2_fwnode_endpoint bus_cfg = {
.bus_type = V4L2_MBUS_CSI2_DPHY,
};
struct fwnode_handle *endpoint;
int ret;
endpoint = fwnode_graph_get_next_endpoint(fwnode, NULL);
if (!endpoint)
return -EINVAL;
ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &bus_cfg);
fwnode_handle_put(endpoint);
if (ret)
return ret;
if (bus_cfg.bus.mipi_csi2.num_data_lanes != OV4689_LANES) {
dev_err(dev, "Only a 4-lane CSI2 config is supported");
ret = -EINVAL;
goto out_free_bus_cfg;
}
if (!ov4689_check_link_frequency(&bus_cfg)) {
dev_err(dev, "No supported link frequency found\n");
ret = -EINVAL;
}
out_free_bus_cfg:
v4l2_fwnode_endpoint_free(&bus_cfg);
return ret;
}
static int ov4689_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct v4l2_subdev *sd;
struct ov4689 *ov4689;
int ret;
ret = ov4689_check_hwcfg(dev);
if (ret)
return ret;
ov4689 = devm_kzalloc(dev, sizeof(*ov4689), GFP_KERNEL);
if (!ov4689)
return -ENOMEM;
ov4689->client = client;
ov4689->cur_mode = &supported_modes[OV4689_MODE_2688_1520];
ov4689->xvclk = devm_clk_get_optional(dev, NULL);
if (IS_ERR(ov4689->xvclk))
return dev_err_probe(dev, PTR_ERR(ov4689->xvclk),
"Failed to get external clock\n");
if (!ov4689->xvclk) {
dev_dbg(dev,
"No clock provided, using clock-frequency property\n");
device_property_read_u32(dev, "clock-frequency",
&ov4689->clock_rate);
} else {
ov4689->clock_rate = clk_get_rate(ov4689->xvclk);
}
if (ov4689->clock_rate != OV4689_XVCLK_FREQ) {
dev_err(dev,
"External clock rate mismatch: got %d Hz, expected %d Hz\n",
ov4689->clock_rate, OV4689_XVCLK_FREQ);
return -EINVAL;
}
ov4689->reset_gpio = devm_gpiod_get_optional(dev, "reset",
GPIOD_OUT_LOW);
if (IS_ERR(ov4689->reset_gpio)) {
dev_err(dev, "Failed to get reset-gpios\n");
return PTR_ERR(ov4689->reset_gpio);
}
ov4689->pwdn_gpio = devm_gpiod_get_optional(dev, "pwdn", GPIOD_OUT_LOW);
if (IS_ERR(ov4689->pwdn_gpio)) {
dev_err(dev, "Failed to get pwdn-gpios\n");
return PTR_ERR(ov4689->pwdn_gpio);
}
ret = ov4689_configure_regulators(ov4689);
if (ret)
return dev_err_probe(dev, ret,
"Failed to get power regulators\n");
mutex_init(&ov4689->mutex);
sd = &ov4689->subdev;
v4l2_i2c_subdev_init(sd, client, &ov4689_subdev_ops);
ret = ov4689_initialize_controls(ov4689);
if (ret)
goto err_destroy_mutex;
ret = ov4689_power_on(dev);
if (ret)
goto err_free_handler;
ret = ov4689_check_sensor_id(ov4689, client);
if (ret)
goto err_power_off;
sd->internal_ops = &ov4689_internal_ops;
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
ov4689->pad.flags = MEDIA_PAD_FL_SOURCE;
sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
ret = media_entity_pads_init(&sd->entity, 1, &ov4689->pad);
if (ret < 0)
goto err_power_off;
ret = v4l2_async_register_subdev_sensor(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:
media_entity_cleanup(&sd->entity);
err_power_off:
ov4689_power_off(dev);
err_free_handler:
v4l2_ctrl_handler_free(&ov4689->ctrl_handler);
err_destroy_mutex:
mutex_destroy(&ov4689->mutex);
return ret;
}
static void ov4689_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ov4689 *ov4689 = to_ov4689(sd);
v4l2_async_unregister_subdev(sd);
media_entity_cleanup(&sd->entity);
v4l2_ctrl_handler_free(&ov4689->ctrl_handler);
mutex_destroy(&ov4689->mutex);
pm_runtime_disable(&client->dev);
if (!pm_runtime_status_suspended(&client->dev))
ov4689_power_off(&client->dev);
pm_runtime_set_suspended(&client->dev);
}
static const struct of_device_id ov4689_of_match[] = {
{ .compatible = "ovti,ov4689" },
{},
};
MODULE_DEVICE_TABLE(of, ov4689_of_match);
static struct i2c_driver ov4689_i2c_driver = {
.driver = {
.name = "ov4689",
.pm = &ov4689_pm_ops,
.of_match_table = ov4689_of_match,
},
.probe_new = ov4689_probe,
.remove = ov4689_remove,
};
module_i2c_driver(ov4689_i2c_driver);
MODULE_DESCRIPTION("OmniVision ov4689 sensor driver");
MODULE_LICENSE("GPL");