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linuxdebug/drivers/media/i2c/ov13b10.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2021 Intel Corporation.
#include <linux/acpi.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-fwnode.h>
#define OV13B10_REG_VALUE_08BIT 1
#define OV13B10_REG_VALUE_16BIT 2
#define OV13B10_REG_VALUE_24BIT 3
#define OV13B10_REG_MODE_SELECT 0x0100
#define OV13B10_MODE_STANDBY 0x00
#define OV13B10_MODE_STREAMING 0x01
#define OV13B10_REG_SOFTWARE_RST 0x0103
#define OV13B10_SOFTWARE_RST 0x01
/* Chip ID */
#define OV13B10_REG_CHIP_ID 0x300a
#define OV13B10_CHIP_ID 0x560d42
/* V_TIMING internal */
#define OV13B10_REG_VTS 0x380e
#define OV13B10_VTS_30FPS 0x0c7c
#define OV13B10_VTS_60FPS 0x063e
#define OV13B10_VTS_MAX 0x7fff
/* HBLANK control - read only */
#define OV13B10_PPL_560MHZ 4704
/* Exposure control */
#define OV13B10_REG_EXPOSURE 0x3500
#define OV13B10_EXPOSURE_MIN 4
#define OV13B10_EXPOSURE_STEP 1
#define OV13B10_EXPOSURE_DEFAULT 0x40
/* Analog gain control */
#define OV13B10_REG_ANALOG_GAIN 0x3508
#define OV13B10_ANA_GAIN_MIN 0x80
#define OV13B10_ANA_GAIN_MAX 0x07c0
#define OV13B10_ANA_GAIN_STEP 1
#define OV13B10_ANA_GAIN_DEFAULT 0x80
/* Digital gain control */
#define OV13B10_REG_DGTL_GAIN_H 0x350a
#define OV13B10_REG_DGTL_GAIN_M 0x350b
#define OV13B10_REG_DGTL_GAIN_L 0x350c
#define OV13B10_DGTL_GAIN_MIN 1024 /* Min = 1 X */
#define OV13B10_DGTL_GAIN_MAX (4096 - 1) /* Max = 4 X */
#define OV13B10_DGTL_GAIN_DEFAULT 2560 /* Default gain = 2.5 X */
#define OV13B10_DGTL_GAIN_STEP 1 /* Each step = 1/1024 */
#define OV13B10_DGTL_GAIN_L_SHIFT 6
#define OV13B10_DGTL_GAIN_L_MASK 0x3
#define OV13B10_DGTL_GAIN_M_SHIFT 2
#define OV13B10_DGTL_GAIN_M_MASK 0xff
#define OV13B10_DGTL_GAIN_H_SHIFT 10
#define OV13B10_DGTL_GAIN_H_MASK 0x3
/* Test Pattern Control */
#define OV13B10_REG_TEST_PATTERN 0x5080
#define OV13B10_TEST_PATTERN_ENABLE BIT(7)
#define OV13B10_TEST_PATTERN_MASK 0xf3
#define OV13B10_TEST_PATTERN_BAR_SHIFT 2
/* Flip Control */
#define OV13B10_REG_FORMAT1 0x3820
#define OV13B10_REG_FORMAT2 0x3821
/* Horizontal Window Offset */
#define OV13B10_REG_H_WIN_OFFSET 0x3811
/* Vertical Window Offset */
#define OV13B10_REG_V_WIN_OFFSET 0x3813
struct ov13b10_reg {
u16 address;
u8 val;
};
struct ov13b10_reg_list {
u32 num_of_regs;
const struct ov13b10_reg *regs;
};
/* Link frequency config */
struct ov13b10_link_freq_config {
u32 pixels_per_line;
/* registers for this link frequency */
struct ov13b10_reg_list reg_list;
};
/* Mode : resolution and related config&values */
struct ov13b10_mode {
/* Frame width */
u32 width;
/* Frame height */
u32 height;
/* V-timing */
u32 vts_def;
u32 vts_min;
/* Index of Link frequency config to be used */
u32 link_freq_index;
/* Default register values */
struct ov13b10_reg_list reg_list;
};
/* 4208x3120 needs 1120Mbps/lane, 4 lanes */
static const struct ov13b10_reg mipi_data_rate_1120mbps[] = {
{0x0103, 0x01},
{0x0303, 0x04},
{0x0305, 0xaf},
{0x0321, 0x00},
{0x0323, 0x04},
{0x0324, 0x01},
{0x0325, 0xa4},
{0x0326, 0x81},
{0x0327, 0x04},
{0x3012, 0x07},
{0x3013, 0x32},
{0x3107, 0x23},
{0x3501, 0x0c},
{0x3502, 0x10},
{0x3504, 0x08},
{0x3508, 0x07},
{0x3509, 0xc0},
{0x3600, 0x16},
{0x3601, 0x54},
{0x3612, 0x4e},
{0x3620, 0x00},
{0x3621, 0x68},
{0x3622, 0x66},
{0x3623, 0x03},
{0x3662, 0x92},
{0x3666, 0xbb},
{0x3667, 0x44},
{0x366e, 0xff},
{0x366f, 0xf3},
{0x3675, 0x44},
{0x3676, 0x00},
{0x367f, 0xe9},
{0x3681, 0x32},
{0x3682, 0x1f},
{0x3683, 0x0b},
{0x3684, 0x0b},
{0x3704, 0x0f},
{0x3706, 0x40},
{0x3708, 0x3b},
{0x3709, 0x72},
{0x370b, 0xa2},
{0x3714, 0x24},
{0x371a, 0x3e},
{0x3725, 0x42},
{0x3739, 0x12},
{0x3767, 0x00},
{0x377a, 0x0d},
{0x3789, 0x18},
{0x3790, 0x40},
{0x3791, 0xa2},
{0x37c2, 0x04},
{0x37c3, 0xf1},
{0x37d9, 0x0c},
{0x37da, 0x02},
{0x37dc, 0x02},
{0x37e1, 0x04},
{0x37e2, 0x0a},
{0x3800, 0x00},
{0x3801, 0x00},
{0x3802, 0x00},
{0x3803, 0x08},
{0x3804, 0x10},
{0x3805, 0x8f},
{0x3806, 0x0c},
{0x3807, 0x47},
{0x3808, 0x10},
{0x3809, 0x70},
{0x380a, 0x0c},
{0x380b, 0x30},
{0x380c, 0x04},
{0x380d, 0x98},
{0x380e, 0x0c},
{0x380f, 0x7c},
{0x3811, 0x0f},
{0x3813, 0x09},
{0x3814, 0x01},
{0x3815, 0x01},
{0x3816, 0x01},
{0x3817, 0x01},
{0x381f, 0x08},
{0x3820, 0x88},
{0x3821, 0x00},
{0x3822, 0x14},
{0x382e, 0xe6},
{0x3c80, 0x00},
{0x3c87, 0x01},
{0x3c8c, 0x19},
{0x3c8d, 0x1c},
{0x3ca0, 0x00},
{0x3ca1, 0x00},
{0x3ca2, 0x00},
{0x3ca3, 0x00},
{0x3ca4, 0x50},
{0x3ca5, 0x11},
{0x3ca6, 0x01},
{0x3ca7, 0x00},
{0x3ca8, 0x00},
{0x4008, 0x02},
{0x4009, 0x0f},
{0x400a, 0x01},
{0x400b, 0x19},
{0x4011, 0x21},
{0x4017, 0x08},
{0x4019, 0x04},
{0x401a, 0x58},
{0x4032, 0x1e},
{0x4050, 0x02},
{0x4051, 0x09},
{0x405e, 0x00},
{0x4066, 0x02},
{0x4501, 0x00},
{0x4502, 0x10},
{0x4505, 0x00},
{0x4800, 0x64},
{0x481b, 0x3e},
{0x481f, 0x30},
{0x4825, 0x34},
{0x4837, 0x0e},
{0x484b, 0x01},
{0x4883, 0x02},
{0x5000, 0xff},
{0x5001, 0x0f},
{0x5045, 0x20},
{0x5046, 0x20},
{0x5047, 0xa4},
{0x5048, 0x20},
{0x5049, 0xa4},
{0x0100, 0x01},
};
static const struct ov13b10_reg mode_4208x3120_regs[] = {
{0x0305, 0xaf},
{0x3501, 0x0c},
{0x3662, 0x92},
{0x3714, 0x24},
{0x3739, 0x12},
{0x37c2, 0x04},
{0x37d9, 0x0c},
{0x37e2, 0x0a},
{0x3800, 0x00},
{0x3801, 0x00},
{0x3802, 0x00},
{0x3803, 0x08},
{0x3804, 0x10},
{0x3805, 0x8f},
{0x3806, 0x0c},
{0x3807, 0x47},
{0x3808, 0x10},
{0x3809, 0x70},
{0x380a, 0x0c},
{0x380b, 0x30},
{0x380c, 0x04},
{0x380d, 0x98},
{0x380e, 0x0c},
{0x380f, 0x7c},
{0x3810, 0x00},
{0x3811, 0x0f},
{0x3812, 0x00},
{0x3813, 0x09},
{0x3814, 0x01},
{0x3816, 0x01},
{0x3820, 0x88},
{0x3c8c, 0x19},
{0x4008, 0x02},
{0x4009, 0x0f},
{0x4050, 0x02},
{0x4051, 0x09},
{0x4501, 0x00},
{0x4505, 0x00},
{0x4837, 0x0e},
{0x5000, 0xff},
{0x5001, 0x0f},
};
static const struct ov13b10_reg mode_4160x3120_regs[] = {
{0x0305, 0xaf},
{0x3501, 0x0c},
{0x3662, 0x92},
{0x3714, 0x24},
{0x3739, 0x12},
{0x37c2, 0x04},
{0x37d9, 0x0c},
{0x37e2, 0x0a},
{0x3800, 0x00},
{0x3801, 0x00},
{0x3802, 0x00},
{0x3803, 0x08},
{0x3804, 0x10},
{0x3805, 0x8f},
{0x3806, 0x0c},
{0x3807, 0x47},
{0x3808, 0x10},
{0x3809, 0x40},
{0x380a, 0x0c},
{0x380b, 0x30},
{0x380c, 0x04},
{0x380d, 0x98},
{0x380e, 0x0c},
{0x380f, 0x7c},
{0x3810, 0x00},
{0x3811, 0x27},
{0x3812, 0x00},
{0x3813, 0x09},
{0x3814, 0x01},
{0x3816, 0x01},
{0x3820, 0x88},
{0x3c8c, 0x19},
{0x4008, 0x02},
{0x4009, 0x0f},
{0x4050, 0x02},
{0x4051, 0x09},
{0x4501, 0x00},
{0x4505, 0x00},
{0x4837, 0x0e},
{0x5000, 0xff},
{0x5001, 0x0f},
};
static const struct ov13b10_reg mode_4160x2340_regs[] = {
{0x0305, 0xaf},
{0x3501, 0x0c},
{0x3662, 0x92},
{0x3714, 0x24},
{0x3739, 0x12},
{0x37c2, 0x04},
{0x37d9, 0x0c},
{0x37e2, 0x0a},
{0x3800, 0x00},
{0x3801, 0x00},
{0x3802, 0x00},
{0x3803, 0x08},
{0x3804, 0x10},
{0x3805, 0x8f},
{0x3806, 0x0c},
{0x3807, 0x47},
{0x3808, 0x10},
{0x3809, 0x40},
{0x380a, 0x09},
{0x380b, 0x24},
{0x380c, 0x04},
{0x380d, 0x98},
{0x380e, 0x0c},
{0x380f, 0x7c},
{0x3810, 0x00},
{0x3811, 0x27},
{0x3812, 0x01},
{0x3813, 0x8f},
{0x3814, 0x01},
{0x3816, 0x01},
{0x3820, 0x88},
{0x3c8c, 0x19},
{0x4008, 0x02},
{0x4009, 0x0f},
{0x4050, 0x02},
{0x4051, 0x09},
{0x4501, 0x00},
{0x4505, 0x00},
{0x4837, 0x0e},
{0x5000, 0xff},
{0x5001, 0x0f},
};
static const struct ov13b10_reg mode_2104x1560_regs[] = {
{0x0305, 0xaf},
{0x3501, 0x06},
{0x3662, 0x88},
{0x3714, 0x28},
{0x3739, 0x10},
{0x37c2, 0x14},
{0x37d9, 0x06},
{0x37e2, 0x0c},
{0x3800, 0x00},
{0x3801, 0x00},
{0x3802, 0x00},
{0x3803, 0x08},
{0x3804, 0x10},
{0x3805, 0x8f},
{0x3806, 0x0c},
{0x3807, 0x47},
{0x3808, 0x08},
{0x3809, 0x38},
{0x380a, 0x06},
{0x380b, 0x18},
{0x380c, 0x04},
{0x380d, 0x98},
{0x380e, 0x06},
{0x380f, 0x3e},
{0x3810, 0x00},
{0x3811, 0x07},
{0x3812, 0x00},
{0x3813, 0x05},
{0x3814, 0x03},
{0x3816, 0x03},
{0x3820, 0x8b},
{0x3c8c, 0x18},
{0x4008, 0x00},
{0x4009, 0x05},
{0x4050, 0x00},
{0x4051, 0x05},
{0x4501, 0x08},
{0x4505, 0x00},
{0x4837, 0x0e},
{0x5000, 0xfd},
{0x5001, 0x0d},
};
static const struct ov13b10_reg mode_2080x1170_regs[] = {
{0x0305, 0xaf},
{0x3501, 0x06},
{0x3662, 0x88},
{0x3714, 0x28},
{0x3739, 0x10},
{0x37c2, 0x14},
{0x37d9, 0x06},
{0x37e2, 0x0c},
{0x3800, 0x00},
{0x3801, 0x00},
{0x3802, 0x00},
{0x3803, 0x08},
{0x3804, 0x10},
{0x3805, 0x8f},
{0x3806, 0x0c},
{0x3807, 0x47},
{0x3808, 0x08},
{0x3809, 0x20},
{0x380a, 0x04},
{0x380b, 0x92},
{0x380c, 0x04},
{0x380d, 0x98},
{0x380e, 0x06},
{0x380f, 0x3e},
{0x3810, 0x00},
{0x3811, 0x13},
{0x3812, 0x00},
{0x3813, 0xc9},
{0x3814, 0x03},
{0x3816, 0x03},
{0x3820, 0x8b},
{0x3c8c, 0x18},
{0x4008, 0x00},
{0x4009, 0x05},
{0x4050, 0x00},
{0x4051, 0x05},
{0x4501, 0x08},
{0x4505, 0x00},
{0x4837, 0x0e},
{0x5000, 0xfd},
{0x5001, 0x0d},
};
static const char * const ov13b10_test_pattern_menu[] = {
"Disabled",
"Vertical Color Bar Type 1",
"Vertical Color Bar Type 2",
"Vertical Color Bar Type 3",
"Vertical Color Bar Type 4"
};
/* Configurations for supported link frequencies */
#define OV13B10_LINK_FREQ_560MHZ 560000000ULL
#define OV13B10_LINK_FREQ_INDEX_0 0
#define OV13B10_EXT_CLK 19200000
#define OV13B10_DATA_LANES 4
/*
* pixel_rate = link_freq * data-rate * nr_of_lanes / bits_per_sample
* data rate => double data rate; number of lanes => 4; bits per pixel => 10
*/
static u64 link_freq_to_pixel_rate(u64 f)
{
f *= 2 * OV13B10_DATA_LANES;
do_div(f, 10);
return f;
}
/* Menu items for LINK_FREQ V4L2 control */
static const s64 link_freq_menu_items[] = {
OV13B10_LINK_FREQ_560MHZ
};
/* Link frequency configs */
static const struct ov13b10_link_freq_config
link_freq_configs[] = {
{
.pixels_per_line = OV13B10_PPL_560MHZ,
.reg_list = {
.num_of_regs = ARRAY_SIZE(mipi_data_rate_1120mbps),
.regs = mipi_data_rate_1120mbps,
}
}
};
/* Mode configs */
static const struct ov13b10_mode supported_modes[] = {
{
.width = 4208,
.height = 3120,
.vts_def = OV13B10_VTS_30FPS,
.vts_min = OV13B10_VTS_30FPS,
.reg_list = {
.num_of_regs = ARRAY_SIZE(mode_4208x3120_regs),
.regs = mode_4208x3120_regs,
},
.link_freq_index = OV13B10_LINK_FREQ_INDEX_0,
},
{
.width = 4160,
.height = 3120,
.vts_def = OV13B10_VTS_30FPS,
.vts_min = OV13B10_VTS_30FPS,
.reg_list = {
.num_of_regs = ARRAY_SIZE(mode_4160x3120_regs),
.regs = mode_4160x3120_regs,
},
.link_freq_index = OV13B10_LINK_FREQ_INDEX_0,
},
{
.width = 4160,
.height = 2340,
.vts_def = OV13B10_VTS_30FPS,
.vts_min = OV13B10_VTS_30FPS,
.reg_list = {
.num_of_regs = ARRAY_SIZE(mode_4160x2340_regs),
.regs = mode_4160x2340_regs,
},
.link_freq_index = OV13B10_LINK_FREQ_INDEX_0,
},
{
.width = 2104,
.height = 1560,
.vts_def = OV13B10_VTS_60FPS,
.vts_min = OV13B10_VTS_60FPS,
.reg_list = {
.num_of_regs = ARRAY_SIZE(mode_2104x1560_regs),
.regs = mode_2104x1560_regs,
},
.link_freq_index = OV13B10_LINK_FREQ_INDEX_0,
},
{
.width = 2080,
.height = 1170,
.vts_def = OV13B10_VTS_60FPS,
.vts_min = OV13B10_VTS_60FPS,
.reg_list = {
.num_of_regs = ARRAY_SIZE(mode_2080x1170_regs),
.regs = mode_2080x1170_regs,
},
.link_freq_index = OV13B10_LINK_FREQ_INDEX_0,
}
};
struct ov13b10 {
struct v4l2_subdev sd;
struct media_pad pad;
struct v4l2_ctrl_handler ctrl_handler;
/* V4L2 Controls */
struct v4l2_ctrl *link_freq;
struct v4l2_ctrl *pixel_rate;
struct v4l2_ctrl *vblank;
struct v4l2_ctrl *hblank;
struct v4l2_ctrl *exposure;
/* Current mode */
const struct ov13b10_mode *cur_mode;
/* Mutex for serialized access */
struct mutex mutex;
/* Streaming on/off */
bool streaming;
};
#define to_ov13b10(_sd) container_of(_sd, struct ov13b10, sd)
/* Read registers up to 4 at a time */
static int ov13b10_read_reg(struct ov13b10 *ov13b,
u16 reg, u32 len, u32 *val)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov13b->sd);
struct i2c_msg msgs[2];
u8 *data_be_p;
int ret;
__be32 data_be = 0;
__be16 reg_addr_be = cpu_to_be16(reg);
if (len > 4)
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;
}
/* Write registers up to 4 at a time */
static int ov13b10_write_reg(struct ov13b10 *ov13b,
u16 reg, u32 len, u32 __val)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov13b->sd);
int buf_i, val_i;
u8 buf[6], *val_p;
__be32 val;
if (len > 4)
return -EINVAL;
buf[0] = reg >> 8;
buf[1] = reg & 0xff;
val = cpu_to_be32(__val);
val_p = (u8 *)&val;
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;
}
/* Write a list of registers */
static int ov13b10_write_regs(struct ov13b10 *ov13b,
const struct ov13b10_reg *regs, u32 len)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov13b->sd);
int ret;
u32 i;
for (i = 0; i < len; i++) {
ret = ov13b10_write_reg(ov13b, regs[i].address, 1,
regs[i].val);
if (ret) {
dev_err_ratelimited(&client->dev,
"Failed to write reg 0x%4.4x. error = %d\n",
regs[i].address, ret);
return ret;
}
}
return 0;
}
static int ov13b10_write_reg_list(struct ov13b10 *ov13b,
const struct ov13b10_reg_list *r_list)
{
return ov13b10_write_regs(ov13b, r_list->regs, r_list->num_of_regs);
}
/* Open sub-device */
static int ov13b10_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
const struct ov13b10_mode *default_mode = &supported_modes[0];
struct ov13b10 *ov13b = to_ov13b10(sd);
struct v4l2_mbus_framefmt *try_fmt = v4l2_subdev_get_try_format(sd,
fh->state,
0);
mutex_lock(&ov13b->mutex);
/* Initialize try_fmt */
try_fmt->width = default_mode->width;
try_fmt->height = default_mode->height;
try_fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
try_fmt->field = V4L2_FIELD_NONE;
/* No crop or compose */
mutex_unlock(&ov13b->mutex);
return 0;
}
static int ov13b10_update_digital_gain(struct ov13b10 *ov13b, u32 d_gain)
{
int ret;
u32 val;
/*
* 0x350C[7:6], 0x350B[7:0], 0x350A[1:0]
*/
val = (d_gain & OV13B10_DGTL_GAIN_L_MASK) << OV13B10_DGTL_GAIN_L_SHIFT;
ret = ov13b10_write_reg(ov13b, OV13B10_REG_DGTL_GAIN_L,
OV13B10_REG_VALUE_08BIT, val);
if (ret)
return ret;
val = (d_gain >> OV13B10_DGTL_GAIN_M_SHIFT) & OV13B10_DGTL_GAIN_M_MASK;
ret = ov13b10_write_reg(ov13b, OV13B10_REG_DGTL_GAIN_M,
OV13B10_REG_VALUE_08BIT, val);
if (ret)
return ret;
val = (d_gain >> OV13B10_DGTL_GAIN_H_SHIFT) & OV13B10_DGTL_GAIN_H_MASK;
ret = ov13b10_write_reg(ov13b, OV13B10_REG_DGTL_GAIN_H,
OV13B10_REG_VALUE_08BIT, val);
return ret;
}
static int ov13b10_enable_test_pattern(struct ov13b10 *ov13b, u32 pattern)
{
int ret;
u32 val;
ret = ov13b10_read_reg(ov13b, OV13B10_REG_TEST_PATTERN,
OV13B10_REG_VALUE_08BIT, &val);
if (ret)
return ret;
if (pattern) {
val &= OV13B10_TEST_PATTERN_MASK;
val |= ((pattern - 1) << OV13B10_TEST_PATTERN_BAR_SHIFT) |
OV13B10_TEST_PATTERN_ENABLE;
} else {
val &= ~OV13B10_TEST_PATTERN_ENABLE;
}
return ov13b10_write_reg(ov13b, OV13B10_REG_TEST_PATTERN,
OV13B10_REG_VALUE_08BIT, val);
}
static int ov13b10_set_ctrl_hflip(struct ov13b10 *ov13b, u32 ctrl_val)
{
int ret;
u32 val;
ret = ov13b10_read_reg(ov13b, OV13B10_REG_FORMAT1,
OV13B10_REG_VALUE_08BIT, &val);
if (ret)
return ret;
ret = ov13b10_write_reg(ov13b, OV13B10_REG_FORMAT1,
OV13B10_REG_VALUE_08BIT,
ctrl_val ? val & ~BIT(3) : val);
if (ret)
return ret;
ret = ov13b10_read_reg(ov13b, OV13B10_REG_H_WIN_OFFSET,
OV13B10_REG_VALUE_08BIT, &val);
if (ret)
return ret;
/*
* Applying cropping offset to reverse the change of Bayer order
* after mirroring image
*/
return ov13b10_write_reg(ov13b, OV13B10_REG_H_WIN_OFFSET,
OV13B10_REG_VALUE_08BIT,
ctrl_val ? ++val : val);
}
static int ov13b10_set_ctrl_vflip(struct ov13b10 *ov13b, u32 ctrl_val)
{
int ret;
u32 val;
ret = ov13b10_read_reg(ov13b, OV13B10_REG_FORMAT1,
OV13B10_REG_VALUE_08BIT, &val);
if (ret)
return ret;
ret = ov13b10_write_reg(ov13b, OV13B10_REG_FORMAT1,
OV13B10_REG_VALUE_08BIT,
ctrl_val ? val | BIT(4) | BIT(5) : val);
if (ret)
return ret;
ret = ov13b10_read_reg(ov13b, OV13B10_REG_V_WIN_OFFSET,
OV13B10_REG_VALUE_08BIT, &val);
if (ret)
return ret;
/*
* Applying cropping offset to reverse the change of Bayer order
* after flipping image
*/
return ov13b10_write_reg(ov13b, OV13B10_REG_V_WIN_OFFSET,
OV13B10_REG_VALUE_08BIT,
ctrl_val ? --val : val);
}
static int ov13b10_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov13b10 *ov13b = container_of(ctrl->handler,
struct ov13b10, ctrl_handler);
struct i2c_client *client = v4l2_get_subdevdata(&ov13b->sd);
s64 max;
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 = ov13b->cur_mode->height + ctrl->val - 8;
__v4l2_ctrl_modify_range(ov13b->exposure,
ov13b->exposure->minimum,
max, ov13b->exposure->step, max);
break;
}
/*
* Applying V4L2 control value only happens
* when power is up for streaming
*/
if (!pm_runtime_get_if_in_use(&client->dev))
return 0;
ret = 0;
switch (ctrl->id) {
case V4L2_CID_ANALOGUE_GAIN:
ret = ov13b10_write_reg(ov13b, OV13B10_REG_ANALOG_GAIN,
OV13B10_REG_VALUE_16BIT,
ctrl->val << 1);
break;
case V4L2_CID_DIGITAL_GAIN:
ret = ov13b10_update_digital_gain(ov13b, ctrl->val);
break;
case V4L2_CID_EXPOSURE:
ret = ov13b10_write_reg(ov13b, OV13B10_REG_EXPOSURE,
OV13B10_REG_VALUE_24BIT,
ctrl->val);
break;
case V4L2_CID_VBLANK:
ret = ov13b10_write_reg(ov13b, OV13B10_REG_VTS,
OV13B10_REG_VALUE_16BIT,
ov13b->cur_mode->height
+ ctrl->val);
break;
case V4L2_CID_TEST_PATTERN:
ret = ov13b10_enable_test_pattern(ov13b, ctrl->val);
break;
case V4L2_CID_HFLIP:
ov13b10_set_ctrl_hflip(ov13b, ctrl->val);
break;
case V4L2_CID_VFLIP:
ov13b10_set_ctrl_vflip(ov13b, ctrl->val);
break;
default:
dev_info(&client->dev,
"ctrl(id:0x%x,val:0x%x) is not handled\n",
ctrl->id, ctrl->val);
break;
}
pm_runtime_put(&client->dev);
return ret;
}
static const struct v4l2_ctrl_ops ov13b10_ctrl_ops = {
.s_ctrl = ov13b10_set_ctrl,
};
static int ov13b10_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
/* Only one bayer order(GRBG) is supported */
if (code->index > 0)
return -EINVAL;
code->code = MEDIA_BUS_FMT_SGRBG10_1X10;
return 0;
}
static int ov13b10_enum_frame_size(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_SGRBG10_1X10)
return -EINVAL;
fse->min_width = supported_modes[fse->index].width;
fse->max_width = fse->min_width;
fse->min_height = supported_modes[fse->index].height;
fse->max_height = fse->min_height;
return 0;
}
static void ov13b10_update_pad_format(const struct ov13b10_mode *mode,
struct v4l2_subdev_format *fmt)
{
fmt->format.width = mode->width;
fmt->format.height = mode->height;
fmt->format.code = MEDIA_BUS_FMT_SGRBG10_1X10;
fmt->format.field = V4L2_FIELD_NONE;
}
static int ov13b10_do_get_pad_format(struct ov13b10 *ov13b,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct v4l2_mbus_framefmt *framefmt;
struct v4l2_subdev *sd = &ov13b->sd;
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
framefmt = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad);
fmt->format = *framefmt;
} else {
ov13b10_update_pad_format(ov13b->cur_mode, fmt);
}
return 0;
}
static int ov13b10_get_pad_format(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct ov13b10 *ov13b = to_ov13b10(sd);
int ret;
mutex_lock(&ov13b->mutex);
ret = ov13b10_do_get_pad_format(ov13b, sd_state, fmt);
mutex_unlock(&ov13b->mutex);
return ret;
}
static int
ov13b10_set_pad_format(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct ov13b10 *ov13b = to_ov13b10(sd);
const struct ov13b10_mode *mode;
struct v4l2_mbus_framefmt *framefmt;
s32 vblank_def;
s32 vblank_min;
s64 h_blank;
s64 pixel_rate;
s64 link_freq;
mutex_lock(&ov13b->mutex);
/* Only one raw bayer(GRBG) order is supported */
if (fmt->format.code != MEDIA_BUS_FMT_SGRBG10_1X10)
fmt->format.code = MEDIA_BUS_FMT_SGRBG10_1X10;
mode = v4l2_find_nearest_size(supported_modes,
ARRAY_SIZE(supported_modes),
width, height,
fmt->format.width, fmt->format.height);
ov13b10_update_pad_format(mode, fmt);
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
framefmt = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad);
*framefmt = fmt->format;
} else {
ov13b->cur_mode = mode;
__v4l2_ctrl_s_ctrl(ov13b->link_freq, mode->link_freq_index);
link_freq = link_freq_menu_items[mode->link_freq_index];
pixel_rate = link_freq_to_pixel_rate(link_freq);
__v4l2_ctrl_s_ctrl_int64(ov13b->pixel_rate, pixel_rate);
/* Update limits and set FPS to default */
vblank_def = ov13b->cur_mode->vts_def -
ov13b->cur_mode->height;
vblank_min = ov13b->cur_mode->vts_min -
ov13b->cur_mode->height;
__v4l2_ctrl_modify_range(ov13b->vblank, vblank_min,
OV13B10_VTS_MAX
- ov13b->cur_mode->height,
1,
vblank_def);
__v4l2_ctrl_s_ctrl(ov13b->vblank, vblank_def);
h_blank =
link_freq_configs[mode->link_freq_index].pixels_per_line
- ov13b->cur_mode->width;
__v4l2_ctrl_modify_range(ov13b->hblank, h_blank,
h_blank, 1, h_blank);
}
mutex_unlock(&ov13b->mutex);
return 0;
}
static int ov13b10_start_streaming(struct ov13b10 *ov13b)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov13b->sd);
const struct ov13b10_reg_list *reg_list;
int ret, link_freq_index;
/* Get out of from software reset */
ret = ov13b10_write_reg(ov13b, OV13B10_REG_SOFTWARE_RST,
OV13B10_REG_VALUE_08BIT, OV13B10_SOFTWARE_RST);
if (ret) {
dev_err(&client->dev, "%s failed to set powerup registers\n",
__func__);
return ret;
}
link_freq_index = ov13b->cur_mode->link_freq_index;
reg_list = &link_freq_configs[link_freq_index].reg_list;
ret = ov13b10_write_reg_list(ov13b, reg_list);
if (ret) {
dev_err(&client->dev, "%s failed to set plls\n", __func__);
return ret;
}
/* Apply default values of current mode */
reg_list = &ov13b->cur_mode->reg_list;
ret = ov13b10_write_reg_list(ov13b, reg_list);
if (ret) {
dev_err(&client->dev, "%s failed to set mode\n", __func__);
return ret;
}
/* Apply customized values from user */
ret = __v4l2_ctrl_handler_setup(ov13b->sd.ctrl_handler);
if (ret)
return ret;
return ov13b10_write_reg(ov13b, OV13B10_REG_MODE_SELECT,
OV13B10_REG_VALUE_08BIT,
OV13B10_MODE_STREAMING);
}
/* Stop streaming */
static int ov13b10_stop_streaming(struct ov13b10 *ov13b)
{
return ov13b10_write_reg(ov13b, OV13B10_REG_MODE_SELECT,
OV13B10_REG_VALUE_08BIT, OV13B10_MODE_STANDBY);
}
static int ov13b10_set_stream(struct v4l2_subdev *sd, int enable)
{
struct ov13b10 *ov13b = to_ov13b10(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret = 0;
mutex_lock(&ov13b->mutex);
if (ov13b->streaming == enable) {
mutex_unlock(&ov13b->mutex);
return 0;
}
if (enable) {
ret = pm_runtime_resume_and_get(&client->dev);
if (ret < 0)
goto err_unlock;
/*
* Apply default & customized values
* and then start streaming.
*/
ret = ov13b10_start_streaming(ov13b);
if (ret)
goto err_rpm_put;
} else {
ov13b10_stop_streaming(ov13b);
pm_runtime_put(&client->dev);
}
ov13b->streaming = enable;
mutex_unlock(&ov13b->mutex);
return ret;
err_rpm_put:
pm_runtime_put(&client->dev);
err_unlock:
mutex_unlock(&ov13b->mutex);
return ret;
}
static int __maybe_unused ov13b10_suspend(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct ov13b10 *ov13b = to_ov13b10(sd);
if (ov13b->streaming)
ov13b10_stop_streaming(ov13b);
return 0;
}
static int __maybe_unused ov13b10_resume(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct ov13b10 *ov13b = to_ov13b10(sd);
int ret;
if (ov13b->streaming) {
ret = ov13b10_start_streaming(ov13b);
if (ret)
goto error;
}
return 0;
error:
ov13b10_stop_streaming(ov13b);
ov13b->streaming = false;
return ret;
}
/* Verify chip ID */
static int ov13b10_identify_module(struct ov13b10 *ov13b)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov13b->sd);
int ret;
u32 val;
ret = ov13b10_read_reg(ov13b, OV13B10_REG_CHIP_ID,
OV13B10_REG_VALUE_24BIT, &val);
if (ret)
return ret;
if (val != OV13B10_CHIP_ID) {
dev_err(&client->dev, "chip id mismatch: %x!=%x\n",
OV13B10_CHIP_ID, val);
return -EIO;
}
return 0;
}
static const struct v4l2_subdev_video_ops ov13b10_video_ops = {
.s_stream = ov13b10_set_stream,
};
static const struct v4l2_subdev_pad_ops ov13b10_pad_ops = {
.enum_mbus_code = ov13b10_enum_mbus_code,
.get_fmt = ov13b10_get_pad_format,
.set_fmt = ov13b10_set_pad_format,
.enum_frame_size = ov13b10_enum_frame_size,
};
static const struct v4l2_subdev_ops ov13b10_subdev_ops = {
.video = &ov13b10_video_ops,
.pad = &ov13b10_pad_ops,
};
static const struct media_entity_operations ov13b10_subdev_entity_ops = {
.link_validate = v4l2_subdev_link_validate,
};
static const struct v4l2_subdev_internal_ops ov13b10_internal_ops = {
.open = ov13b10_open,
};
/* Initialize control handlers */
static int ov13b10_init_controls(struct ov13b10 *ov13b)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov13b->sd);
struct v4l2_fwnode_device_properties props;
struct v4l2_ctrl_handler *ctrl_hdlr;
s64 exposure_max;
s64 vblank_def;
s64 vblank_min;
s64 hblank;
s64 pixel_rate_min;
s64 pixel_rate_max;
const struct ov13b10_mode *mode;
u32 max;
int ret;
ctrl_hdlr = &ov13b->ctrl_handler;
ret = v4l2_ctrl_handler_init(ctrl_hdlr, 10);
if (ret)
return ret;
mutex_init(&ov13b->mutex);
ctrl_hdlr->lock = &ov13b->mutex;
max = ARRAY_SIZE(link_freq_menu_items) - 1;
ov13b->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr,
&ov13b10_ctrl_ops,
V4L2_CID_LINK_FREQ,
max,
0,
link_freq_menu_items);
if (ov13b->link_freq)
ov13b->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
pixel_rate_max = link_freq_to_pixel_rate(link_freq_menu_items[0]);
pixel_rate_min = 0;
/* By default, PIXEL_RATE is read only */
ov13b->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov13b10_ctrl_ops,
V4L2_CID_PIXEL_RATE,
pixel_rate_min, pixel_rate_max,
1, pixel_rate_max);
mode = ov13b->cur_mode;
vblank_def = mode->vts_def - mode->height;
vblank_min = mode->vts_min - mode->height;
ov13b->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov13b10_ctrl_ops,
V4L2_CID_VBLANK,
vblank_min,
OV13B10_VTS_MAX - mode->height, 1,
vblank_def);
hblank = link_freq_configs[mode->link_freq_index].pixels_per_line -
mode->width;
ov13b->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov13b10_ctrl_ops,
V4L2_CID_HBLANK,
hblank, hblank, 1, hblank);
if (ov13b->hblank)
ov13b->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
exposure_max = mode->vts_def - 8;
ov13b->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &ov13b10_ctrl_ops,
V4L2_CID_EXPOSURE,
OV13B10_EXPOSURE_MIN,
exposure_max, OV13B10_EXPOSURE_STEP,
exposure_max);
v4l2_ctrl_new_std(ctrl_hdlr, &ov13b10_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
OV13B10_ANA_GAIN_MIN, OV13B10_ANA_GAIN_MAX,
OV13B10_ANA_GAIN_STEP, OV13B10_ANA_GAIN_DEFAULT);
/* Digital gain */
v4l2_ctrl_new_std(ctrl_hdlr, &ov13b10_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
OV13B10_DGTL_GAIN_MIN, OV13B10_DGTL_GAIN_MAX,
OV13B10_DGTL_GAIN_STEP, OV13B10_DGTL_GAIN_DEFAULT);
v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &ov13b10_ctrl_ops,
V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(ov13b10_test_pattern_menu) - 1,
0, 0, ov13b10_test_pattern_menu);
v4l2_ctrl_new_std(ctrl_hdlr, &ov13b10_ctrl_ops,
V4L2_CID_HFLIP, 0, 1, 1, 0);
v4l2_ctrl_new_std(ctrl_hdlr, &ov13b10_ctrl_ops,
V4L2_CID_VFLIP, 0, 1, 1, 0);
if (ctrl_hdlr->error) {
ret = ctrl_hdlr->error;
dev_err(&client->dev, "%s control init failed (%d)\n",
__func__, ret);
goto error;
}
ret = v4l2_fwnode_device_parse(&client->dev, &props);
if (ret)
goto error;
ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &ov13b10_ctrl_ops,
&props);
if (ret)
goto error;
ov13b->sd.ctrl_handler = ctrl_hdlr;
return 0;
error:
v4l2_ctrl_handler_free(ctrl_hdlr);
mutex_destroy(&ov13b->mutex);
return ret;
}
static void ov13b10_free_controls(struct ov13b10 *ov13b)
{
v4l2_ctrl_handler_free(ov13b->sd.ctrl_handler);
mutex_destroy(&ov13b->mutex);
}
static int ov13b10_check_hwcfg(struct device *dev)
{
struct v4l2_fwnode_endpoint bus_cfg = {
.bus_type = V4L2_MBUS_CSI2_DPHY
};
struct fwnode_handle *ep;
struct fwnode_handle *fwnode = dev_fwnode(dev);
unsigned int i, j;
int ret;
u32 ext_clk;
if (!fwnode)
return -ENXIO;
ret = fwnode_property_read_u32(dev_fwnode(dev), "clock-frequency",
&ext_clk);
if (ret) {
dev_err(dev, "can't get clock frequency");
return ret;
}
if (ext_clk != OV13B10_EXT_CLK) {
dev_err(dev, "external clock %d is not supported",
ext_clk);
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;
if (bus_cfg.bus.mipi_csi2.num_data_lanes != OV13B10_DATA_LANES) {
dev_err(dev, "number of CSI2 data lanes %d is not supported",
bus_cfg.bus.mipi_csi2.num_data_lanes);
ret = -EINVAL;
goto out_err;
}
if (!bus_cfg.nr_of_link_frequencies) {
dev_err(dev, "no link frequencies defined");
ret = -EINVAL;
goto out_err;
}
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",
link_freq_menu_items[i]);
ret = -EINVAL;
goto out_err;
}
}
out_err:
v4l2_fwnode_endpoint_free(&bus_cfg);
return ret;
}
static int ov13b10_probe(struct i2c_client *client)
{
struct ov13b10 *ov13b;
int ret;
/* Check HW config */
ret = ov13b10_check_hwcfg(&client->dev);
if (ret) {
dev_err(&client->dev, "failed to check hwcfg: %d", ret);
return ret;
}
ov13b = devm_kzalloc(&client->dev, sizeof(*ov13b), GFP_KERNEL);
if (!ov13b)
return -ENOMEM;
/* Initialize subdev */
v4l2_i2c_subdev_init(&ov13b->sd, client, &ov13b10_subdev_ops);
/* Check module identity */
ret = ov13b10_identify_module(ov13b);
if (ret) {
dev_err(&client->dev, "failed to find sensor: %d\n", ret);
return ret;
}
/* Set default mode to max resolution */
ov13b->cur_mode = &supported_modes[0];
ret = ov13b10_init_controls(ov13b);
if (ret)
return ret;
/* Initialize subdev */
ov13b->sd.internal_ops = &ov13b10_internal_ops;
ov13b->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
ov13b->sd.entity.ops = &ov13b10_subdev_entity_ops;
ov13b->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
/* Initialize source pad */
ov13b->pad.flags = MEDIA_PAD_FL_SOURCE;
ret = media_entity_pads_init(&ov13b->sd.entity, 1, &ov13b->pad);
if (ret) {
dev_err(&client->dev, "%s failed:%d\n", __func__, ret);
goto error_handler_free;
}
ret = v4l2_async_register_subdev_sensor(&ov13b->sd);
if (ret < 0)
goto error_media_entity;
/*
* Device is already turned on by i2c-core with ACPI domain PM.
* Enable runtime PM and turn off the device.
*/
pm_runtime_set_active(&client->dev);
pm_runtime_enable(&client->dev);
pm_runtime_idle(&client->dev);
return 0;
error_media_entity:
media_entity_cleanup(&ov13b->sd.entity);
error_handler_free:
ov13b10_free_controls(ov13b);
dev_err(&client->dev, "%s failed:%d\n", __func__, ret);
return ret;
}
static void ov13b10_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ov13b10 *ov13b = to_ov13b10(sd);
v4l2_async_unregister_subdev(sd);
media_entity_cleanup(&sd->entity);
ov13b10_free_controls(ov13b);
pm_runtime_disable(&client->dev);
}
static const struct dev_pm_ops ov13b10_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(ov13b10_suspend, ov13b10_resume)
};
#ifdef CONFIG_ACPI
static const struct acpi_device_id ov13b10_acpi_ids[] = {
{"OVTIDB10"},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(acpi, ov13b10_acpi_ids);
#endif
static struct i2c_driver ov13b10_i2c_driver = {
.driver = {
.name = "ov13b10",
.pm = &ov13b10_pm_ops,
.acpi_match_table = ACPI_PTR(ov13b10_acpi_ids),
},
.probe_new = ov13b10_probe,
.remove = ov13b10_remove,
};
module_i2c_driver(ov13b10_i2c_driver);
MODULE_AUTHOR("Kao, Arec <arec.kao@intel.com>");
MODULE_DESCRIPTION("Omnivision ov13b10 sensor driver");
MODULE_LICENSE("GPL v2");