/
ov2740.c
1443 lines (1230 loc) · 33 KB
/
ov2740.c
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// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2020 Intel Corporation.
#include <asm/unaligned.h>
#include <linux/acpi.h>
#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/nvmem-provider.h>
#include <linux/regmap.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-fwnode.h>
#define OV2740_LINK_FREQ_360MHZ 360000000ULL
#define OV2740_LINK_FREQ_180MHZ 180000000ULL
#define OV2740_SCLK 72000000LL
#define OV2740_MCLK 19200000
#define OV2740_DATA_LANES 2
#define OV2740_RGB_DEPTH 10
#define OV2740_REG_CHIP_ID 0x300a
#define OV2740_CHIP_ID 0x2740
#define OV2740_REG_MODE_SELECT 0x0100
#define OV2740_MODE_STANDBY 0x00
#define OV2740_MODE_STREAMING 0x01
/* vertical-timings from sensor */
#define OV2740_REG_VTS 0x380e
/* horizontal-timings from sensor */
#define OV2740_REG_HTS 0x380c
/* Exposure controls from sensor */
#define OV2740_REG_EXPOSURE 0x3500
#define OV2740_EXPOSURE_MIN 4
#define OV2740_EXPOSURE_MAX_MARGIN 8
#define OV2740_EXPOSURE_STEP 1
/* Analog gain controls from sensor */
#define OV2740_REG_ANALOG_GAIN 0x3508
#define OV2740_ANAL_GAIN_MIN 128
#define OV2740_ANAL_GAIN_MAX 1983
#define OV2740_ANAL_GAIN_STEP 1
/* Digital gain controls from sensor */
#define OV2740_REG_MWB_R_GAIN 0x500a
#define OV2740_REG_MWB_G_GAIN 0x500c
#define OV2740_REG_MWB_B_GAIN 0x500e
#define OV2740_DGTL_GAIN_MIN 1024
#define OV2740_DGTL_GAIN_MAX 4095
#define OV2740_DGTL_GAIN_STEP 1
#define OV2740_DGTL_GAIN_DEFAULT 1024
/* Test Pattern Control */
#define OV2740_REG_TEST_PATTERN 0x5040
#define OV2740_TEST_PATTERN_ENABLE BIT(7)
#define OV2740_TEST_PATTERN_BAR_SHIFT 2
/* Group Access */
#define OV2740_REG_GROUP_ACCESS 0x3208
#define OV2740_GROUP_HOLD_START 0x0
#define OV2740_GROUP_HOLD_END 0x10
#define OV2740_GROUP_HOLD_LAUNCH 0xa0
/* ISP CTRL00 */
#define OV2740_REG_ISP_CTRL00 0x5000
/* ISP CTRL01 */
#define OV2740_REG_ISP_CTRL01 0x5001
/* Customer Addresses: 0x7010 - 0x710F */
#define CUSTOMER_USE_OTP_SIZE 0x100
/* OTP registers from sensor */
#define OV2740_REG_OTP_CUSTOMER 0x7010
struct nvm_data {
struct nvmem_device *nvmem;
struct regmap *regmap;
char *nvm_buffer;
};
enum {
OV2740_LINK_FREQ_360MHZ_INDEX,
OV2740_LINK_FREQ_180MHZ_INDEX,
};
struct ov2740_reg {
u16 address;
u8 val;
};
struct ov2740_reg_list {
u32 num_of_regs;
const struct ov2740_reg *regs;
};
struct ov2740_link_freq_config {
const struct ov2740_reg_list reg_list;
};
struct ov2740_mode {
/* Frame width in pixels */
u32 width;
/* Frame height in pixels */
u32 height;
/* Horizontal timining size */
u32 hts;
/* Default vertical timining size */
u32 vts_def;
/* Min vertical timining size */
u32 vts_min;
/* Max vertical timining size */
u32 vts_max;
/* Link frequency needed for this resolution */
u32 link_freq_index;
/* Sensor register settings for this resolution */
const struct ov2740_reg_list reg_list;
};
static const struct ov2740_reg mipi_data_rate_720mbps[] = {
{0x0302, 0x4b},
{0x030d, 0x4b},
{0x030e, 0x02},
{0x030a, 0x01},
{0x0312, 0x11},
};
static const struct ov2740_reg mipi_data_rate_360mbps[] = {
{0x0302, 0x4b},
{0x0303, 0x01},
{0x030d, 0x4b},
{0x030e, 0x02},
{0x030a, 0x01},
{0x0312, 0x11},
{0x4837, 0x2c},
};
static const struct ov2740_reg mode_1932x1092_regs_360mhz[] = {
{0x3000, 0x00},
{0x3018, 0x32},
{0x3031, 0x0a},
{0x3080, 0x08},
{0x3083, 0xB4},
{0x3103, 0x00},
{0x3104, 0x01},
{0x3106, 0x01},
{0x3500, 0x00},
{0x3501, 0x44},
{0x3502, 0x40},
{0x3503, 0x88},
{0x3507, 0x00},
{0x3508, 0x00},
{0x3509, 0x80},
{0x350c, 0x00},
{0x350d, 0x80},
{0x3510, 0x00},
{0x3511, 0x00},
{0x3512, 0x20},
{0x3632, 0x00},
{0x3633, 0x10},
{0x3634, 0x10},
{0x3635, 0x10},
{0x3645, 0x13},
{0x3646, 0x81},
{0x3636, 0x10},
{0x3651, 0x0a},
{0x3656, 0x02},
{0x3659, 0x04},
{0x365a, 0xda},
{0x365b, 0xa2},
{0x365c, 0x04},
{0x365d, 0x1d},
{0x365e, 0x1a},
{0x3662, 0xd7},
{0x3667, 0x78},
{0x3669, 0x0a},
{0x366a, 0x92},
{0x3700, 0x54},
{0x3702, 0x10},
{0x3706, 0x42},
{0x3709, 0x30},
{0x370b, 0xc2},
{0x3714, 0x63},
{0x3715, 0x01},
{0x3716, 0x00},
{0x371a, 0x3e},
{0x3732, 0x0e},
{0x3733, 0x10},
{0x375f, 0x0e},
{0x3768, 0x30},
{0x3769, 0x44},
{0x376a, 0x22},
{0x377b, 0x20},
{0x377c, 0x00},
{0x377d, 0x0c},
{0x3798, 0x00},
{0x37a1, 0x55},
{0x37a8, 0x6d},
{0x37c2, 0x04},
{0x37c5, 0x00},
{0x37c8, 0x00},
{0x3800, 0x00},
{0x3801, 0x00},
{0x3802, 0x00},
{0x3803, 0x00},
{0x3804, 0x07},
{0x3805, 0x8f},
{0x3806, 0x04},
{0x3807, 0x47},
{0x3808, 0x07},
{0x3809, 0x88},
{0x380a, 0x04},
{0x380b, 0x40},
{0x380c, 0x04},
{0x380d, 0x38},
{0x380e, 0x04},
{0x380f, 0x60},
{0x3810, 0x00},
{0x3811, 0x04},
{0x3812, 0x00},
{0x3813, 0x04},
{0x3814, 0x01},
{0x3815, 0x01},
{0x3820, 0x80},
{0x3821, 0x46},
{0x3822, 0x84},
{0x3829, 0x00},
{0x382a, 0x01},
{0x382b, 0x01},
{0x3830, 0x04},
{0x3836, 0x01},
{0x3837, 0x08},
{0x3839, 0x01},
{0x383a, 0x00},
{0x383b, 0x08},
{0x383c, 0x00},
{0x3f0b, 0x00},
{0x4001, 0x20},
{0x4009, 0x07},
{0x4003, 0x10},
{0x4010, 0xe0},
{0x4016, 0x00},
{0x4017, 0x10},
{0x4044, 0x02},
{0x4304, 0x08},
{0x4307, 0x30},
{0x4320, 0x80},
{0x4322, 0x00},
{0x4323, 0x00},
{0x4324, 0x00},
{0x4325, 0x00},
{0x4326, 0x00},
{0x4327, 0x00},
{0x4328, 0x00},
{0x4329, 0x00},
{0x432c, 0x03},
{0x432d, 0x81},
{0x4501, 0x84},
{0x4502, 0x40},
{0x4503, 0x18},
{0x4504, 0x04},
{0x4508, 0x02},
{0x4601, 0x10},
{0x4800, 0x00},
{0x4816, 0x52},
{0x4837, 0x16},
{0x5000, 0x7f},
{0x5001, 0x00},
{0x5005, 0x38},
{0x501e, 0x0d},
{0x5040, 0x00},
{0x5901, 0x00},
{0x3800, 0x00},
{0x3801, 0x00},
{0x3802, 0x00},
{0x3803, 0x00},
{0x3804, 0x07},
{0x3805, 0x8f},
{0x3806, 0x04},
{0x3807, 0x47},
{0x3808, 0x07},
{0x3809, 0x8c},
{0x380a, 0x04},
{0x380b, 0x44},
{0x3810, 0x00},
{0x3811, 0x00},
{0x3812, 0x00},
{0x3813, 0x01},
};
static const struct ov2740_reg mode_1932x1092_regs_180mhz[] = {
{0x3000, 0x00},
{0x3018, 0x32}, /* 0x32 for 2 lanes, 0x12 for 1 lane */
{0x3031, 0x0a},
{0x3080, 0x08},
{0x3083, 0xB4},
{0x3103, 0x00},
{0x3104, 0x01},
{0x3106, 0x01},
{0x3500, 0x00},
{0x3501, 0x44},
{0x3502, 0x40},
{0x3503, 0x88},
{0x3507, 0x00},
{0x3508, 0x00},
{0x3509, 0x80},
{0x350c, 0x00},
{0x350d, 0x80},
{0x3510, 0x00},
{0x3511, 0x00},
{0x3512, 0x20},
{0x3632, 0x00},
{0x3633, 0x10},
{0x3634, 0x10},
{0x3635, 0x10},
{0x3645, 0x13},
{0x3646, 0x81},
{0x3636, 0x10},
{0x3651, 0x0a},
{0x3656, 0x02},
{0x3659, 0x04},
{0x365a, 0xda},
{0x365b, 0xa2},
{0x365c, 0x04},
{0x365d, 0x1d},
{0x365e, 0x1a},
{0x3662, 0xd7},
{0x3667, 0x78},
{0x3669, 0x0a},
{0x366a, 0x92},
{0x3700, 0x54},
{0x3702, 0x10},
{0x3706, 0x42},
{0x3709, 0x30},
{0x370b, 0xc2},
{0x3714, 0x63},
{0x3715, 0x01},
{0x3716, 0x00},
{0x371a, 0x3e},
{0x3732, 0x0e},
{0x3733, 0x10},
{0x375f, 0x0e},
{0x3768, 0x30},
{0x3769, 0x44},
{0x376a, 0x22},
{0x377b, 0x20},
{0x377c, 0x00},
{0x377d, 0x0c},
{0x3798, 0x00},
{0x37a1, 0x55},
{0x37a8, 0x6d},
{0x37c2, 0x04},
{0x37c5, 0x00},
{0x37c8, 0x00},
{0x3800, 0x00},
{0x3801, 0x00},
{0x3802, 0x00},
{0x3803, 0x00},
{0x3804, 0x07},
{0x3805, 0x8f},
{0x3806, 0x04},
{0x3807, 0x47},
{0x3808, 0x07},
{0x3809, 0x88},
{0x380a, 0x04},
{0x380b, 0x40},
{0x380c, 0x08},
{0x380d, 0x70},
{0x380e, 0x04},
{0x380f, 0x56},
{0x3810, 0x00},
{0x3811, 0x04},
{0x3812, 0x00},
{0x3813, 0x04},
{0x3814, 0x01},
{0x3815, 0x01},
{0x3820, 0x80},
{0x3821, 0x46},
{0x3822, 0x84},
{0x3829, 0x00},
{0x382a, 0x01},
{0x382b, 0x01},
{0x3830, 0x04},
{0x3836, 0x01},
{0x3837, 0x08},
{0x3839, 0x01},
{0x383a, 0x00},
{0x383b, 0x08},
{0x383c, 0x00},
{0x3f0b, 0x00},
{0x4001, 0x20},
{0x4009, 0x07},
{0x4003, 0x10},
{0x4010, 0xe0},
{0x4016, 0x00},
{0x4017, 0x10},
{0x4044, 0x02},
{0x4304, 0x08},
{0x4307, 0x30},
{0x4320, 0x80},
{0x4322, 0x00},
{0x4323, 0x00},
{0x4324, 0x00},
{0x4325, 0x00},
{0x4326, 0x00},
{0x4327, 0x00},
{0x4328, 0x00},
{0x4329, 0x00},
{0x432c, 0x03},
{0x432d, 0x81},
{0x4501, 0x84},
{0x4502, 0x40},
{0x4503, 0x18},
{0x4504, 0x04},
{0x4508, 0x02},
{0x4601, 0x10},
{0x4800, 0x00},
{0x4816, 0x52},
{0x5000, 0x73}, /* 0x7f enable DPC */
{0x5001, 0x00},
{0x5005, 0x38},
{0x501e, 0x0d},
{0x5040, 0x00},
{0x5901, 0x00},
{0x3800, 0x00},
{0x3801, 0x00},
{0x3802, 0x00},
{0x3803, 0x00},
{0x3804, 0x07},
{0x3805, 0x8f},
{0x3806, 0x04},
{0x3807, 0x47},
{0x3808, 0x07},
{0x3809, 0x8c},
{0x380a, 0x04},
{0x380b, 0x44},
{0x3810, 0x00},
{0x3811, 0x00},
{0x3812, 0x00},
{0x3813, 0x01},
{0x4003, 0x40}, /* set Black level to 0x40 */
};
static const char * const ov2740_test_pattern_menu[] = {
"Disabled",
"Color Bar",
"Top-Bottom Darker Color Bar",
"Right-Left Darker Color Bar",
"Bottom-Top Darker Color Bar",
};
static const s64 link_freq_menu_items[] = {
OV2740_LINK_FREQ_360MHZ,
OV2740_LINK_FREQ_180MHZ,
};
static const struct ov2740_link_freq_config link_freq_configs[] = {
[OV2740_LINK_FREQ_360MHZ_INDEX] = {
.reg_list = {
.num_of_regs = ARRAY_SIZE(mipi_data_rate_720mbps),
.regs = mipi_data_rate_720mbps,
}
},
[OV2740_LINK_FREQ_180MHZ_INDEX] = {
.reg_list = {
.num_of_regs = ARRAY_SIZE(mipi_data_rate_360mbps),
.regs = mipi_data_rate_360mbps,
}
},
};
static const struct ov2740_mode supported_modes_360mhz[] = {
{
.width = 1932,
.height = 1092,
.hts = 2160,
.vts_min = 1120,
.vts_def = 2186,
.vts_max = 32767,
.reg_list = {
.num_of_regs = ARRAY_SIZE(mode_1932x1092_regs_360mhz),
.regs = mode_1932x1092_regs_360mhz,
},
.link_freq_index = OV2740_LINK_FREQ_360MHZ_INDEX,
},
};
static const struct ov2740_mode supported_modes_180mhz[] = {
{
.width = 1932,
.height = 1092,
.hts = 2160,
.vts_min = 1110,
.vts_def = 1110,
.vts_max = 2047,
.reg_list = {
.num_of_regs = ARRAY_SIZE(mode_1932x1092_regs_180mhz),
.regs = mode_1932x1092_regs_180mhz,
},
.link_freq_index = OV2740_LINK_FREQ_180MHZ_INDEX,
},
};
struct ov2740 {
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;
/* GPIOs, clocks */
struct gpio_desc *reset_gpio;
struct clk *clk;
/* Current mode */
const struct ov2740_mode *cur_mode;
/* NVM data inforamtion */
struct nvm_data *nvm;
/* Supported modes */
const struct ov2740_mode *supported_modes;
int supported_modes_count;
/* True if the device has been identified */
bool identified;
};
static inline struct ov2740 *to_ov2740(struct v4l2_subdev *subdev)
{
return container_of(subdev, struct ov2740, sd);
}
static u64 to_pixel_rate(u32 f_index)
{
u64 pixel_rate = link_freq_menu_items[f_index] * 2 * OV2740_DATA_LANES;
do_div(pixel_rate, OV2740_RGB_DEPTH);
return pixel_rate;
}
static int ov2740_read_reg(struct ov2740 *ov2740, u16 reg, u16 len, u32 *val)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
struct i2c_msg msgs[2];
u8 addr_buf[2];
u8 data_buf[4] = {0};
int ret;
if (len > sizeof(data_buf))
return -EINVAL;
put_unaligned_be16(reg, addr_buf);
msgs[0].addr = client->addr;
msgs[0].flags = 0;
msgs[0].len = sizeof(addr_buf);
msgs[0].buf = addr_buf;
msgs[1].addr = client->addr;
msgs[1].flags = I2C_M_RD;
msgs[1].len = len;
msgs[1].buf = &data_buf[sizeof(data_buf) - len];
ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (ret != ARRAY_SIZE(msgs))
return ret < 0 ? ret : -EIO;
*val = get_unaligned_be32(data_buf);
return 0;
}
static int ov2740_write_reg(struct ov2740 *ov2740, u16 reg, u16 len, u32 val)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
u8 buf[6];
int ret;
if (len > 4)
return -EINVAL;
put_unaligned_be16(reg, buf);
put_unaligned_be32(val << 8 * (4 - len), buf + 2);
ret = i2c_master_send(client, buf, len + 2);
if (ret != len + 2)
return ret < 0 ? ret : -EIO;
return 0;
}
static int ov2740_write_reg_list(struct ov2740 *ov2740,
const struct ov2740_reg_list *r_list)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
unsigned int i;
int ret;
for (i = 0; i < r_list->num_of_regs; i++) {
ret = ov2740_write_reg(ov2740, r_list->regs[i].address, 1,
r_list->regs[i].val);
if (ret) {
dev_err_ratelimited(&client->dev,
"write reg 0x%4.4x return err = %d\n",
r_list->regs[i].address, ret);
return ret;
}
}
return 0;
}
static int ov2740_identify_module(struct ov2740 *ov2740)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
int ret;
u32 val;
if (ov2740->identified)
return 0;
ret = ov2740_read_reg(ov2740, OV2740_REG_CHIP_ID, 3, &val);
if (ret)
return ret;
if (val != OV2740_CHIP_ID) {
dev_err(&client->dev, "chip id mismatch: %x != %x\n",
OV2740_CHIP_ID, val);
return -ENXIO;
}
ov2740->identified = true;
return 0;
}
static int ov2740_update_digital_gain(struct ov2740 *ov2740, u32 d_gain)
{
int ret;
ret = ov2740_write_reg(ov2740, OV2740_REG_GROUP_ACCESS, 1,
OV2740_GROUP_HOLD_START);
if (ret)
return ret;
ret = ov2740_write_reg(ov2740, OV2740_REG_MWB_R_GAIN, 2, d_gain);
if (ret)
return ret;
ret = ov2740_write_reg(ov2740, OV2740_REG_MWB_G_GAIN, 2, d_gain);
if (ret)
return ret;
ret = ov2740_write_reg(ov2740, OV2740_REG_MWB_B_GAIN, 2, d_gain);
if (ret)
return ret;
ret = ov2740_write_reg(ov2740, OV2740_REG_GROUP_ACCESS, 1,
OV2740_GROUP_HOLD_END);
if (ret)
return ret;
ret = ov2740_write_reg(ov2740, OV2740_REG_GROUP_ACCESS, 1,
OV2740_GROUP_HOLD_LAUNCH);
return ret;
}
static int ov2740_test_pattern(struct ov2740 *ov2740, u32 pattern)
{
if (pattern)
pattern = (pattern - 1) << OV2740_TEST_PATTERN_BAR_SHIFT |
OV2740_TEST_PATTERN_ENABLE;
return ov2740_write_reg(ov2740, OV2740_REG_TEST_PATTERN, 1, pattern);
}
static int ov2740_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov2740 *ov2740 = container_of(ctrl->handler,
struct ov2740, ctrl_handler);
struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
s64 exposure_max;
int ret;
/* Propagate change of current control to all related controls */
if (ctrl->id == V4L2_CID_VBLANK) {
/* Update max exposure while meeting expected vblanking */
exposure_max = ov2740->cur_mode->height + ctrl->val -
OV2740_EXPOSURE_MAX_MARGIN;
__v4l2_ctrl_modify_range(ov2740->exposure,
ov2740->exposure->minimum,
exposure_max, ov2740->exposure->step,
exposure_max);
}
/* 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_ANALOGUE_GAIN:
ret = ov2740_write_reg(ov2740, OV2740_REG_ANALOG_GAIN, 2,
ctrl->val);
break;
case V4L2_CID_DIGITAL_GAIN:
ret = ov2740_update_digital_gain(ov2740, ctrl->val);
break;
case V4L2_CID_EXPOSURE:
/* 4 least significant bits of expsoure are fractional part */
ret = ov2740_write_reg(ov2740, OV2740_REG_EXPOSURE, 3,
ctrl->val << 4);
break;
case V4L2_CID_VBLANK:
ret = ov2740_write_reg(ov2740, OV2740_REG_VTS, 2,
ov2740->cur_mode->height + ctrl->val);
break;
case V4L2_CID_TEST_PATTERN:
ret = ov2740_test_pattern(ov2740, ctrl->val);
break;
default:
ret = -EINVAL;
break;
}
pm_runtime_put(&client->dev);
return ret;
}
static const struct v4l2_ctrl_ops ov2740_ctrl_ops = {
.s_ctrl = ov2740_set_ctrl,
};
static int ov2740_init_controls(struct ov2740 *ov2740)
{
struct v4l2_ctrl_handler *ctrl_hdlr;
const struct ov2740_mode *cur_mode;
s64 exposure_max, h_blank, pixel_rate;
u32 vblank_min, vblank_max, vblank_default;
int size;
int ret;
ctrl_hdlr = &ov2740->ctrl_handler;
ret = v4l2_ctrl_handler_init(ctrl_hdlr, 8);
if (ret)
return ret;
cur_mode = ov2740->cur_mode;
size = ARRAY_SIZE(link_freq_menu_items);
ov2740->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, &ov2740_ctrl_ops,
V4L2_CID_LINK_FREQ,
size - 1, 0,
link_freq_menu_items);
if (ov2740->link_freq)
ov2740->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
pixel_rate = to_pixel_rate(OV2740_LINK_FREQ_360MHZ_INDEX);
ov2740->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov2740_ctrl_ops,
V4L2_CID_PIXEL_RATE, 0,
pixel_rate, 1, pixel_rate);
vblank_min = cur_mode->vts_min - cur_mode->height;
vblank_max = cur_mode->vts_max - cur_mode->height;
vblank_default = cur_mode->vts_def - cur_mode->height;
ov2740->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov2740_ctrl_ops,
V4L2_CID_VBLANK, vblank_min,
vblank_max, 1, vblank_default);
h_blank = cur_mode->hts - cur_mode->width;
ov2740->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov2740_ctrl_ops,
V4L2_CID_HBLANK, h_blank, h_blank, 1,
h_blank);
if (ov2740->hblank)
ov2740->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
v4l2_ctrl_new_std(ctrl_hdlr, &ov2740_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
OV2740_ANAL_GAIN_MIN, OV2740_ANAL_GAIN_MAX,
OV2740_ANAL_GAIN_STEP, OV2740_ANAL_GAIN_MIN);
v4l2_ctrl_new_std(ctrl_hdlr, &ov2740_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
OV2740_DGTL_GAIN_MIN, OV2740_DGTL_GAIN_MAX,
OV2740_DGTL_GAIN_STEP, OV2740_DGTL_GAIN_DEFAULT);
exposure_max = cur_mode->vts_def - OV2740_EXPOSURE_MAX_MARGIN;
ov2740->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &ov2740_ctrl_ops,
V4L2_CID_EXPOSURE,
OV2740_EXPOSURE_MIN, exposure_max,
OV2740_EXPOSURE_STEP,
exposure_max);
v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &ov2740_ctrl_ops,
V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(ov2740_test_pattern_menu) - 1,
0, 0, ov2740_test_pattern_menu);
if (ctrl_hdlr->error) {
v4l2_ctrl_handler_free(ctrl_hdlr);
return ctrl_hdlr->error;
}
ov2740->sd.ctrl_handler = ctrl_hdlr;
return 0;
}
static void ov2740_update_pad_format(const struct ov2740_mode *mode,
struct v4l2_mbus_framefmt *fmt)
{
fmt->width = mode->width;
fmt->height = mode->height;
fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
fmt->field = V4L2_FIELD_NONE;
}
static int ov2740_load_otp_data(struct nvm_data *nvm)
{
struct device *dev = regmap_get_device(nvm->regmap);
struct ov2740 *ov2740 = to_ov2740(dev_get_drvdata(dev));
u32 isp_ctrl00 = 0;
u32 isp_ctrl01 = 0;
int ret;
if (nvm->nvm_buffer)
return 0;
nvm->nvm_buffer = kzalloc(CUSTOMER_USE_OTP_SIZE, GFP_KERNEL);
if (!nvm->nvm_buffer)
return -ENOMEM;
ret = ov2740_read_reg(ov2740, OV2740_REG_ISP_CTRL00, 1, &isp_ctrl00);
if (ret) {
dev_err(dev, "failed to read ISP CTRL00\n");
goto err;
}
ret = ov2740_read_reg(ov2740, OV2740_REG_ISP_CTRL01, 1, &isp_ctrl01);
if (ret) {
dev_err(dev, "failed to read ISP CTRL01\n");
goto err;
}
/* Clear bit 5 of ISP CTRL00 */
ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL00, 1,
isp_ctrl00 & ~BIT(5));
if (ret) {
dev_err(dev, "failed to set ISP CTRL00\n");
goto err;
}
/* Clear bit 7 of ISP CTRL01 */
ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL01, 1,
isp_ctrl01 & ~BIT(7));
if (ret) {
dev_err(dev, "failed to set ISP CTRL01\n");
goto err;
}
ret = ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, 1,
OV2740_MODE_STREAMING);
if (ret) {
dev_err(dev, "failed to set streaming mode\n");
goto err;
}
/*
* Users are not allowed to access OTP-related registers and memory
* during the 20 ms period after streaming starts (0x100 = 0x01).
*/
msleep(20);
ret = regmap_bulk_read(nvm->regmap, OV2740_REG_OTP_CUSTOMER,
nvm->nvm_buffer, CUSTOMER_USE_OTP_SIZE);
if (ret) {
dev_err(dev, "failed to read OTP data, ret %d\n", ret);
goto err;
}
ret = ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, 1,
OV2740_MODE_STANDBY);
if (ret) {
dev_err(dev, "failed to set streaming mode\n");
goto err;
}
ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL01, 1, isp_ctrl01);
if (ret) {
dev_err(dev, "failed to set ISP CTRL01\n");
goto err;
}
ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL00, 1, isp_ctrl00);
if (ret) {
dev_err(dev, "failed to set ISP CTRL00\n");
goto err;
}
return 0;
err:
kfree(nvm->nvm_buffer);
nvm->nvm_buffer = NULL;
return ret;
}
static int ov2740_start_streaming(struct ov2740 *ov2740)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
const struct ov2740_reg_list *reg_list;
int link_freq_index;
int ret;
ret = ov2740_identify_module(ov2740);
if (ret)
return ret;
if (ov2740->nvm)
ov2740_load_otp_data(ov2740->nvm);
/* Reset the sensor */
ret = ov2740_write_reg(ov2740, 0x0103, 1, 0x01);
if (ret) {
dev_err(&client->dev, "failed to reset\n");
return ret;
}
usleep_range(10000, 15000);
link_freq_index = ov2740->cur_mode->link_freq_index;
reg_list = &link_freq_configs[link_freq_index].reg_list;
ret = ov2740_write_reg_list(ov2740, reg_list);
if (ret) {
dev_err(&client->dev, "failed to set plls\n");
return ret;
}
reg_list = &ov2740->cur_mode->reg_list;
ret = ov2740_write_reg_list(ov2740, reg_list);
if (ret) {
dev_err(&client->dev, "failed to set mode\n");
return ret;
}
ret = __v4l2_ctrl_handler_setup(ov2740->sd.ctrl_handler);
if (ret)
return ret;
ret = ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, 1,
OV2740_MODE_STREAMING);
if (ret)
dev_err(&client->dev, "failed to start streaming\n");
return ret;
}
static void ov2740_stop_streaming(struct ov2740 *ov2740)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
if (ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, 1,
OV2740_MODE_STANDBY))
dev_err(&client->dev, "failed to stop streaming\n");
}
static int ov2740_set_stream(struct v4l2_subdev *sd, int enable)
{
struct ov2740 *ov2740 = to_ov2740(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct v4l2_subdev_state *sd_state;
int ret = 0;
sd_state = v4l2_subdev_lock_and_get_active_state(&ov2740->sd);
if (enable) {
ret = pm_runtime_resume_and_get(&client->dev);
if (ret < 0)
goto out_unlock;
ret = ov2740_start_streaming(ov2740);
if (ret) {
enable = 0;
ov2740_stop_streaming(ov2740);
pm_runtime_put(&client->dev);
}