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linux/linux-5.4.31/drivers/media/i2c/ov5695.c

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2024-01-30 10:43:28 +00:00
// SPDX-License-Identifier: GPL-2.0
/*
* ov5695 driver
*
* Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd.
*/
#include <linux/clk.h>
#include <linux/device.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 <linux/sysfs.h>
#include <media/media-entity.h>
#include <media/v4l2-async.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-subdev.h>
#ifndef V4L2_CID_DIGITAL_GAIN
#define V4L2_CID_DIGITAL_GAIN V4L2_CID_GAIN
#endif
/* 45Mhz * 4 Binning */
#define OV5695_PIXEL_RATE (45 * 1000 * 1000 * 4)
#define OV5695_XVCLK_FREQ 24000000
#define CHIP_ID 0x005695
#define OV5695_REG_CHIP_ID 0x300a
#define OV5695_REG_CTRL_MODE 0x0100
#define OV5695_MODE_SW_STANDBY 0x0
#define OV5695_MODE_STREAMING BIT(0)
#define OV5695_REG_EXPOSURE 0x3500
#define OV5695_EXPOSURE_MIN 4
#define OV5695_EXPOSURE_STEP 1
#define OV5695_VTS_MAX 0x7fff
#define OV5695_REG_ANALOG_GAIN 0x3509
#define ANALOG_GAIN_MIN 0x10
#define ANALOG_GAIN_MAX 0xf8
#define ANALOG_GAIN_STEP 1
#define ANALOG_GAIN_DEFAULT 0xf8
#define OV5695_REG_DIGI_GAIN_H 0x350a
#define OV5695_REG_DIGI_GAIN_L 0x350b
#define OV5695_DIGI_GAIN_L_MASK 0x3f
#define OV5695_DIGI_GAIN_H_SHIFT 6
#define OV5695_DIGI_GAIN_MIN 0
#define OV5695_DIGI_GAIN_MAX (0x4000 - 1)
#define OV5695_DIGI_GAIN_STEP 1
#define OV5695_DIGI_GAIN_DEFAULT 1024
#define OV5695_REG_TEST_PATTERN 0x4503
#define OV5695_TEST_PATTERN_ENABLE 0x80
#define OV5695_TEST_PATTERN_DISABLE 0x0
#define OV5695_REG_VTS 0x380e
#define REG_NULL 0xFFFF
#define OV5695_REG_VALUE_08BIT 1
#define OV5695_REG_VALUE_16BIT 2
#define OV5695_REG_VALUE_24BIT 3
#define OV5695_LANES 2
#define OV5695_BITS_PER_SAMPLE 10
static const char * const ov5695_supply_names[] = {
"avdd", /* Analog power */
"dovdd", /* Digital I/O power */
"dvdd", /* Digital core power */
};
#define OV5695_NUM_SUPPLIES ARRAY_SIZE(ov5695_supply_names)
struct regval {
u16 addr;
u8 val;
};
struct ov5695_mode {
u32 width;
u32 height;
u32 max_fps;
u32 hts_def;
u32 vts_def;
u32 exp_def;
const struct regval *reg_list;
};
struct ov5695 {
struct i2c_client *client;
struct clk *xvclk;
struct gpio_desc *reset_gpio;
struct regulator_bulk_data supplies[OV5695_NUM_SUPPLIES];
struct v4l2_subdev subdev;
struct media_pad pad;
struct v4l2_ctrl_handler ctrl_handler;
struct v4l2_ctrl *exposure;
struct v4l2_ctrl *anal_gain;
struct v4l2_ctrl *digi_gain;
struct v4l2_ctrl *hblank;
struct v4l2_ctrl *vblank;
struct v4l2_ctrl *test_pattern;
struct mutex mutex;
bool streaming;
const struct ov5695_mode *cur_mode;
};
#define to_ov5695(sd) container_of(sd, struct ov5695, subdev)
/*
* Xclk 24Mhz
* Pclk 45Mhz
* linelength 672(0x2a0)
* framelength 2232(0x8b8)
* grabwindow_width 1296
* grabwindow_height 972
* max_framerate 30fps
* mipi_datarate per lane 840Mbps
*/
static const struct regval ov5695_global_regs[] = {
{0x0103, 0x01},
{0x0100, 0x00},
{0x0300, 0x04},
{0x0301, 0x00},
{0x0302, 0x69},
{0x0303, 0x00},
{0x0304, 0x00},
{0x0305, 0x01},
{0x0307, 0x00},
{0x030b, 0x00},
{0x030c, 0x00},
{0x030d, 0x1e},
{0x030e, 0x04},
{0x030f, 0x03},
{0x0312, 0x01},
{0x3000, 0x00},
{0x3002, 0xa1},
{0x3008, 0x00},
{0x3010, 0x00},
{0x3022, 0x51},
{0x3106, 0x15},
{0x3107, 0x01},
{0x3108, 0x05},
{0x3500, 0x00},
{0x3501, 0x45},
{0x3502, 0x00},
{0x3503, 0x08},
{0x3504, 0x03},
{0x3505, 0x8c},
{0x3507, 0x03},
{0x3508, 0x00},
{0x3509, 0x10},
{0x350c, 0x00},
{0x350d, 0x80},
{0x3510, 0x00},
{0x3511, 0x02},
{0x3512, 0x00},
{0x3601, 0x55},
{0x3602, 0x58},
{0x3614, 0x30},
{0x3615, 0x77},
{0x3621, 0x08},
{0x3624, 0x40},
{0x3633, 0x0c},
{0x3634, 0x0c},
{0x3635, 0x0c},
{0x3636, 0x0c},
{0x3638, 0x00},
{0x3639, 0x00},
{0x363a, 0x00},
{0x363b, 0x00},
{0x363c, 0xff},
{0x363d, 0xfa},
{0x3650, 0x44},
{0x3651, 0x44},
{0x3652, 0x44},
{0x3653, 0x44},
{0x3654, 0x44},
{0x3655, 0x44},
{0x3656, 0x44},
{0x3657, 0x44},
{0x3660, 0x00},
{0x3661, 0x00},
{0x3662, 0x00},
{0x366a, 0x00},
{0x366e, 0x0c},
{0x3673, 0x04},
{0x3700, 0x14},
{0x3703, 0x0c},
{0x3715, 0x01},
{0x3733, 0x10},
{0x3734, 0x40},
{0x373f, 0xa0},
{0x3765, 0x20},
{0x37a1, 0x1d},
{0x37a8, 0x26},
{0x37ab, 0x14},
{0x37c2, 0x04},
{0x37cb, 0x09},
{0x37cc, 0x13},
{0x37cd, 0x1f},
{0x37ce, 0x1f},
{0x3800, 0x00},
{0x3801, 0x00},
{0x3802, 0x00},
{0x3803, 0x00},
{0x3804, 0x0a},
{0x3805, 0x3f},
{0x3806, 0x07},
{0x3807, 0xaf},
{0x3808, 0x05},
{0x3809, 0x10},
{0x380a, 0x03},
{0x380b, 0xcc},
{0x380c, 0x02},
{0x380d, 0xa0},
{0x380e, 0x08},
{0x380f, 0xb8},
{0x3810, 0x00},
{0x3811, 0x06},
{0x3812, 0x00},
{0x3813, 0x06},
{0x3814, 0x03},
{0x3815, 0x01},
{0x3816, 0x03},
{0x3817, 0x01},
{0x3818, 0x00},
{0x3819, 0x00},
{0x381a, 0x00},
{0x381b, 0x01},
{0x3820, 0x8b},
{0x3821, 0x01},
{0x3c80, 0x08},
{0x3c82, 0x00},
{0x3c83, 0x00},
{0x3c88, 0x00},
{0x3d85, 0x14},
{0x3f02, 0x08},
{0x3f03, 0x10},
{0x4008, 0x02},
{0x4009, 0x09},
{0x404e, 0x20},
{0x4501, 0x00},
{0x4502, 0x10},
{0x4800, 0x00},
{0x481f, 0x2a},
{0x4837, 0x13},
{0x5000, 0x17},
{0x5780, 0x3e},
{0x5781, 0x0f},
{0x5782, 0x44},
{0x5783, 0x02},
{0x5784, 0x01},
{0x5785, 0x01},
{0x5786, 0x00},
{0x5787, 0x04},
{0x5788, 0x02},
{0x5789, 0x0f},
{0x578a, 0xfd},
{0x578b, 0xf5},
{0x578c, 0xf5},
{0x578d, 0x03},
{0x578e, 0x08},
{0x578f, 0x0c},
{0x5790, 0x08},
{0x5791, 0x06},
{0x5792, 0x00},
{0x5793, 0x52},
{0x5794, 0xa3},
{0x5b00, 0x00},
{0x5b01, 0x1c},
{0x5b02, 0x00},
{0x5b03, 0x7f},
{0x5b05, 0x6c},
{0x5e10, 0xfc},
{0x4010, 0xf1},
{0x3503, 0x08},
{0x3505, 0x8c},
{0x3507, 0x03},
{0x3508, 0x00},
{0x3509, 0xf8},
{REG_NULL, 0x00},
};
/*
* Xclk 24Mhz
* Pclk 45Mhz
* linelength 740(0x2e4)
* framelength 2024(0x7e8)
* grabwindow_width 2592
* grabwindow_height 1944
* max_framerate 30fps
* mipi_datarate per lane 840Mbps
*/
static const struct regval ov5695_2592x1944_regs[] = {
{0x3501, 0x7e},
{0x366e, 0x18},
{0x3800, 0x00},
{0x3801, 0x00},
{0x3802, 0x00},
{0x3803, 0x04},
{0x3804, 0x0a},
{0x3805, 0x3f},
{0x3806, 0x07},
{0x3807, 0xab},
{0x3808, 0x0a},
{0x3809, 0x20},
{0x380a, 0x07},
{0x380b, 0x98},
{0x380c, 0x02},
{0x380d, 0xe4},
{0x380e, 0x07},
{0x380f, 0xe8},
{0x3811, 0x06},
{0x3813, 0x08},
{0x3814, 0x01},
{0x3816, 0x01},
{0x3817, 0x01},
{0x3820, 0x88},
{0x3821, 0x00},
{0x4501, 0x00},
{0x4008, 0x04},
{0x4009, 0x13},
{REG_NULL, 0x00},
};
/*
* Xclk 24Mhz
* Pclk 45Mhz
* linelength 672(0x2a0)
* framelength 2232(0x8b8)
* grabwindow_width 1920
* grabwindow_height 1080
* max_framerate 30fps
* mipi_datarate per lane 840Mbps
*/
static const struct regval ov5695_1920x1080_regs[] = {
{0x3501, 0x45},
{0x366e, 0x18},
{0x3800, 0x01},
{0x3801, 0x50},
{0x3802, 0x01},
{0x3803, 0xb8},
{0x3804, 0x08},
{0x3805, 0xef},
{0x3806, 0x05},
{0x3807, 0xf7},
{0x3808, 0x07},
{0x3809, 0x80},
{0x380a, 0x04},
{0x380b, 0x38},
{0x380c, 0x02},
{0x380d, 0xa0},
{0x380e, 0x08},
{0x380f, 0xb8},
{0x3811, 0x06},
{0x3813, 0x04},
{0x3814, 0x01},
{0x3816, 0x01},
{0x3817, 0x01},
{0x3820, 0x88},
{0x3821, 0x00},
{0x4501, 0x00},
{0x4008, 0x04},
{0x4009, 0x13},
{REG_NULL, 0x00}
};
/*
* Xclk 24Mhz
* Pclk 45Mhz
* linelength 740(0x02e4)
* framelength 1012(0x03f4)
* grabwindow_width 1296
* grabwindow_height 972
* max_framerate 60fps
* mipi_datarate per lane 840Mbps
*/
static const struct regval ov5695_1296x972_regs[] = {
{0x0103, 0x01},
{0x0100, 0x00},
{0x0300, 0x04},
{0x0301, 0x00},
{0x0302, 0x69},
{0x0303, 0x00},
{0x0304, 0x00},
{0x0305, 0x01},
{0x0307, 0x00},
{0x030b, 0x00},
{0x030c, 0x00},
{0x030d, 0x1e},
{0x030e, 0x04},
{0x030f, 0x03},
{0x0312, 0x01},
{0x3000, 0x00},
{0x3002, 0xa1},
{0x3008, 0x00},
{0x3010, 0x00},
{0x3016, 0x32},
{0x3022, 0x51},
{0x3106, 0x15},
{0x3107, 0x01},
{0x3108, 0x05},
{0x3500, 0x00},
{0x3501, 0x3e},
{0x3502, 0x00},
{0x3503, 0x08},
{0x3504, 0x03},
{0x3505, 0x8c},
{0x3507, 0x03},
{0x3508, 0x00},
{0x3509, 0x10},
{0x350c, 0x00},
{0x350d, 0x80},
{0x3510, 0x00},
{0x3511, 0x02},
{0x3512, 0x00},
{0x3601, 0x55},
{0x3602, 0x58},
{0x3611, 0x58},
{0x3614, 0x30},
{0x3615, 0x77},
{0x3621, 0x08},
{0x3624, 0x40},
{0x3633, 0x0c},
{0x3634, 0x0c},
{0x3635, 0x0c},
{0x3636, 0x0c},
{0x3638, 0x00},
{0x3639, 0x00},
{0x363a, 0x00},
{0x363b, 0x00},
{0x363c, 0xff},
{0x363d, 0xfa},
{0x3650, 0x44},
{0x3651, 0x44},
{0x3652, 0x44},
{0x3653, 0x44},
{0x3654, 0x44},
{0x3655, 0x44},
{0x3656, 0x44},
{0x3657, 0x44},
{0x3660, 0x00},
{0x3661, 0x00},
{0x3662, 0x00},
{0x366a, 0x00},
{0x366e, 0x0c},
{0x3673, 0x04},
{0x3700, 0x14},
{0x3703, 0x0c},
{0x3706, 0x24},
{0x3714, 0x27},
{0x3715, 0x01},
{0x3716, 0x00},
{0x3717, 0x02},
{0x3733, 0x10},
{0x3734, 0x40},
{0x373f, 0xa0},
{0x3765, 0x20},
{0x37a1, 0x1d},
{0x37a8, 0x26},
{0x37ab, 0x14},
{0x37c2, 0x04},
{0x37c3, 0xf0},
{0x37cb, 0x09},
{0x37cc, 0x13},
{0x37cd, 0x1f},
{0x37ce, 0x1f},
{0x3800, 0x00},
{0x3801, 0x00},
{0x3802, 0x00},
{0x3803, 0x00},
{0x3804, 0x0a},
{0x3805, 0x3f},
{0x3806, 0x07},
{0x3807, 0xaf},
{0x3808, 0x05},
{0x3809, 0x10},
{0x380a, 0x03},
{0x380b, 0xcc},
{0x380c, 0x02},
{0x380d, 0xe4},
{0x380e, 0x03},
{0x380f, 0xf4},
{0x3810, 0x00},
{0x3811, 0x00},
{0x3812, 0x00},
{0x3813, 0x06},
{0x3814, 0x03},
{0x3815, 0x01},
{0x3816, 0x03},
{0x3817, 0x01},
{0x3818, 0x00},
{0x3819, 0x00},
{0x381a, 0x00},
{0x381b, 0x01},
{0x3820, 0x8b},
{0x3821, 0x01},
{0x3c80, 0x08},
{0x3c82, 0x00},
{0x3c83, 0x00},
{0x3c88, 0x00},
{0x3d85, 0x14},
{0x3f02, 0x08},
{0x3f03, 0x10},
{0x4008, 0x02},
{0x4009, 0x09},
{0x404e, 0x20},
{0x4501, 0x00},
{0x4502, 0x10},
{0x4800, 0x00},
{0x481f, 0x2a},
{0x4837, 0x13},
{0x5000, 0x13},
{0x5780, 0x3e},
{0x5781, 0x0f},
{0x5782, 0x44},
{0x5783, 0x02},
{0x5784, 0x01},
{0x5785, 0x01},
{0x5786, 0x00},
{0x5787, 0x04},
{0x5788, 0x02},
{0x5789, 0x0f},
{0x578a, 0xfd},
{0x578b, 0xf5},
{0x578c, 0xf5},
{0x578d, 0x03},
{0x578e, 0x08},
{0x578f, 0x0c},
{0x5790, 0x08},
{0x5791, 0x06},
{0x5792, 0x00},
{0x5793, 0x52},
{0x5794, 0xa3},
{0x5b00, 0x00},
{0x5b01, 0x1c},
{0x5b02, 0x00},
{0x5b03, 0x7f},
{0x5b05, 0x6c},
{0x5e10, 0xfc},
{0x4010, 0xf1},
{0x3503, 0x08},
{0x3505, 0x8c},
{0x3507, 0x03},
{0x3508, 0x00},
{0x3509, 0xf8},
{0x0100, 0x01},
{REG_NULL, 0x00}
};
/*
* Xclk 24Mhz
* Pclk 45Mhz
* linelength 672(0x2a0)
* framelength 2232(0x8b8)
* grabwindow_width 1280
* grabwindow_height 720
* max_framerate 30fps
* mipi_datarate per lane 840Mbps
*/
static const struct regval ov5695_1280x720_regs[] = {
{0x3501, 0x45},
{0x366e, 0x0c},
{0x3800, 0x00},
{0x3801, 0x00},
{0x3802, 0x01},
{0x3803, 0x00},
{0x3804, 0x0a},
{0x3805, 0x3f},
{0x3806, 0x06},
{0x3807, 0xaf},
{0x3808, 0x05},
{0x3809, 0x00},
{0x380a, 0x02},
{0x380b, 0xd0},
{0x380c, 0x02},
{0x380d, 0xa0},
{0x380e, 0x08},
{0x380f, 0xb8},
{0x3811, 0x06},
{0x3813, 0x02},
{0x3814, 0x03},
{0x3816, 0x03},
{0x3817, 0x01},
{0x3820, 0x8b},
{0x3821, 0x01},
{0x4501, 0x00},
{0x4008, 0x02},
{0x4009, 0x09},
{REG_NULL, 0x00}
};
/*
* Xclk 24Mhz
* Pclk 45Mhz
* linelength 672(0x2a0)
* framelength 558(0x22e)
* grabwindow_width 640
* grabwindow_height 480
* max_framerate 120fps
* mipi_datarate per lane 840Mbps
*/
static const struct regval ov5695_640x480_regs[] = {
{0x3501, 0x22},
{0x366e, 0x0c},
{0x3800, 0x00},
{0x3801, 0x00},
{0x3802, 0x00},
{0x3803, 0x08},
{0x3804, 0x0a},
{0x3805, 0x3f},
{0x3806, 0x07},
{0x3807, 0xa7},
{0x3808, 0x02},
{0x3809, 0x80},
{0x380a, 0x01},
{0x380b, 0xe0},
{0x380c, 0x02},
{0x380d, 0xa0},
{0x380e, 0x02},
{0x380f, 0x2e},
{0x3811, 0x06},
{0x3813, 0x04},
{0x3814, 0x07},
{0x3816, 0x05},
{0x3817, 0x03},
{0x3820, 0x8d},
{0x3821, 0x01},
{0x4501, 0x00},
{0x4008, 0x02},
{0x4009, 0x09},
{REG_NULL, 0x00}
};
static const struct ov5695_mode supported_modes[] = {
{
.width = 2592,
.height = 1944,
.max_fps = 30,
.exp_def = 0x0450,
.hts_def = 0x02e4 * 4,
.vts_def = 0x07e8,
.reg_list = ov5695_2592x1944_regs,
},
{
.width = 1920,
.height = 1080,
.max_fps = 30,
.exp_def = 0x0450,
.hts_def = 0x02a0 * 4,
.vts_def = 0x08b8,
.reg_list = ov5695_1920x1080_regs,
},
{
.width = 1296,
.height = 972,
.max_fps = 60,
.exp_def = 0x03e0,
.hts_def = 0x02e4 * 4,
.vts_def = 0x03f4,
.reg_list = ov5695_1296x972_regs,
},
{
.width = 1280,
.height = 720,
.max_fps = 30,
.exp_def = 0x0450,
.hts_def = 0x02a0 * 4,
.vts_def = 0x08b8,
.reg_list = ov5695_1280x720_regs,
},
{
.width = 640,
.height = 480,
.max_fps = 120,
.exp_def = 0x0450,
.hts_def = 0x02a0 * 4,
.vts_def = 0x022e,
.reg_list = ov5695_640x480_regs,
},
};
#define OV5695_LINK_FREQ_420MHZ 420000000
static const s64 link_freq_menu_items[] = {
OV5695_LINK_FREQ_420MHZ
};
static const char * const ov5695_test_pattern_menu[] = {
"Disabled",
"Vertical Color Bar Type 1",
"Vertical Color Bar Type 2",
"Vertical Color Bar Type 3",
"Vertical Color Bar Type 4"
};
/* Write registers up to 4 at a time */
static int ov5695_write_reg(struct i2c_client *client, u16 reg,
u32 len, u32 val)
{
u32 buf_i, val_i;
u8 buf[6];
u8 *val_p;
__be32 val_be;
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 ov5695_write_array(struct i2c_client *client,
const struct regval *regs)
{
u32 i;
int ret = 0;
for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++)
ret = ov5695_write_reg(client, regs[i].addr,
OV5695_REG_VALUE_08BIT, regs[i].val);
return ret;
}
/* Read registers up to 4 at a time */
static int ov5695_read_reg(struct i2c_client *client, u16 reg, unsigned int len,
u32 *val)
{
struct i2c_msg msgs[2];
u8 *data_be_p;
__be32 data_be = 0;
__be16 reg_addr_be = cpu_to_be16(reg);
int ret;
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;
}
static int ov5695_get_reso_dist(const struct ov5695_mode *mode,
struct v4l2_mbus_framefmt *framefmt)
{
return abs(mode->width - framefmt->width) +
abs(mode->height - framefmt->height);
}
static const struct ov5695_mode *
ov5695_find_best_fit(struct v4l2_subdev_format *fmt)
{
struct v4l2_mbus_framefmt *framefmt = &fmt->format;
int dist;
int cur_best_fit = 0;
int cur_best_fit_dist = -1;
int i;
for (i = 0; i < ARRAY_SIZE(supported_modes); i++) {
dist = ov5695_get_reso_dist(&supported_modes[i], framefmt);
if (cur_best_fit_dist == -1 || dist < cur_best_fit_dist) {
cur_best_fit_dist = dist;
cur_best_fit = i;
}
}
return &supported_modes[cur_best_fit];
}
static int ov5695_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct ov5695 *ov5695 = to_ov5695(sd);
const struct ov5695_mode *mode;
s64 h_blank, vblank_def;
mutex_lock(&ov5695->mutex);
mode = ov5695_find_best_fit(fmt);
fmt->format.code = MEDIA_BUS_FMT_SBGGR10_1X10;
fmt->format.width = mode->width;
fmt->format.height = mode->height;
fmt->format.field = V4L2_FIELD_NONE;
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
*v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format;
#endif
} else {
ov5695->cur_mode = mode;
h_blank = mode->hts_def - mode->width;
__v4l2_ctrl_modify_range(ov5695->hblank, h_blank,
h_blank, 1, h_blank);
vblank_def = mode->vts_def - mode->height;
__v4l2_ctrl_modify_range(ov5695->vblank, vblank_def,
OV5695_VTS_MAX - mode->height,
1, vblank_def);
}
mutex_unlock(&ov5695->mutex);
return 0;
}
static int ov5695_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct ov5695 *ov5695 = to_ov5695(sd);
const struct ov5695_mode *mode = ov5695->cur_mode;
mutex_lock(&ov5695->mutex);
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
fmt->format = *v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
#else
mutex_unlock(&ov5695->mutex);
return -EINVAL;
#endif
} else {
fmt->format.width = mode->width;
fmt->format.height = mode->height;
fmt->format.code = MEDIA_BUS_FMT_SBGGR10_1X10;
fmt->format.field = V4L2_FIELD_NONE;
}
mutex_unlock(&ov5695->mutex);
return 0;
}
static int ov5695_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_mbus_code_enum *code)
{
if (code->index != 0)
return -EINVAL;
code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
return 0;
}
static int ov5695_enum_frame_sizes(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
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 ov5695_enable_test_pattern(struct ov5695 *ov5695, u32 pattern)
{
u32 val;
if (pattern)
val = (pattern - 1) | OV5695_TEST_PATTERN_ENABLE;
else
val = OV5695_TEST_PATTERN_DISABLE;
return ov5695_write_reg(ov5695->client, OV5695_REG_TEST_PATTERN,
OV5695_REG_VALUE_08BIT, val);
}
static int __ov5695_start_stream(struct ov5695 *ov5695)
{
int ret;
ret = ov5695_write_array(ov5695->client, ov5695_global_regs);
if (ret)
return ret;
ret = ov5695_write_array(ov5695->client, ov5695->cur_mode->reg_list);
if (ret)
return ret;
/* In case these controls are set before streaming */
ret = __v4l2_ctrl_handler_setup(&ov5695->ctrl_handler);
if (ret)
return ret;
return ov5695_write_reg(ov5695->client, OV5695_REG_CTRL_MODE,
OV5695_REG_VALUE_08BIT, OV5695_MODE_STREAMING);
}
static int __ov5695_stop_stream(struct ov5695 *ov5695)
{
return ov5695_write_reg(ov5695->client, OV5695_REG_CTRL_MODE,
OV5695_REG_VALUE_08BIT, OV5695_MODE_SW_STANDBY);
}
static int ov5695_s_stream(struct v4l2_subdev *sd, int on)
{
struct ov5695 *ov5695 = to_ov5695(sd);
struct i2c_client *client = ov5695->client;
int ret = 0;
mutex_lock(&ov5695->mutex);
on = !!on;
if (on == ov5695->streaming)
goto unlock_and_return;
if (on) {
ret = pm_runtime_get_sync(&client->dev);
if (ret < 0) {
pm_runtime_put_noidle(&client->dev);
goto unlock_and_return;
}
ret = __ov5695_start_stream(ov5695);
if (ret) {
v4l2_err(sd, "start stream failed while write regs\n");
pm_runtime_put(&client->dev);
goto unlock_and_return;
}
} else {
__ov5695_stop_stream(ov5695);
pm_runtime_put(&client->dev);
}
ov5695->streaming = on;
unlock_and_return:
mutex_unlock(&ov5695->mutex);
return ret;
}
/* Calculate the delay in us by clock rate and clock cycles */
static inline u32 ov5695_cal_delay(u32 cycles)
{
return DIV_ROUND_UP(cycles, OV5695_XVCLK_FREQ / 1000 / 1000);
}
static int __ov5695_power_on(struct ov5695 *ov5695)
{
int ret;
u32 delay_us;
struct device *dev = &ov5695->client->dev;
ret = clk_prepare_enable(ov5695->xvclk);
if (ret < 0) {
dev_err(dev, "Failed to enable xvclk\n");
return ret;
}
gpiod_set_value_cansleep(ov5695->reset_gpio, 1);
ret = regulator_bulk_enable(OV5695_NUM_SUPPLIES, ov5695->supplies);
if (ret < 0) {
dev_err(dev, "Failed to enable regulators\n");
goto disable_clk;
}
gpiod_set_value_cansleep(ov5695->reset_gpio, 0);
/* 8192 cycles prior to first SCCB transaction */
delay_us = ov5695_cal_delay(8192);
usleep_range(delay_us, delay_us * 2);
return 0;
disable_clk:
clk_disable_unprepare(ov5695->xvclk);
return ret;
}
static void __ov5695_power_off(struct ov5695 *ov5695)
{
clk_disable_unprepare(ov5695->xvclk);
gpiod_set_value_cansleep(ov5695->reset_gpio, 1);
regulator_bulk_disable(OV5695_NUM_SUPPLIES, ov5695->supplies);
}
static int __maybe_unused ov5695_runtime_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ov5695 *ov5695 = to_ov5695(sd);
return __ov5695_power_on(ov5695);
}
static int __maybe_unused ov5695_runtime_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ov5695 *ov5695 = to_ov5695(sd);
__ov5695_power_off(ov5695);
return 0;
}
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
static int ov5695_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
struct ov5695 *ov5695 = to_ov5695(sd);
struct v4l2_mbus_framefmt *try_fmt =
v4l2_subdev_get_try_format(sd, fh->pad, 0);
const struct ov5695_mode *def_mode = &supported_modes[0];
mutex_lock(&ov5695->mutex);
/* Initialize try_fmt */
try_fmt->width = def_mode->width;
try_fmt->height = def_mode->height;
try_fmt->code = MEDIA_BUS_FMT_SBGGR10_1X10;
try_fmt->field = V4L2_FIELD_NONE;
mutex_unlock(&ov5695->mutex);
/* No crop or compose */
return 0;
}
#endif
static const struct dev_pm_ops ov5695_pm_ops = {
SET_RUNTIME_PM_OPS(ov5695_runtime_suspend,
ov5695_runtime_resume, NULL)
};
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
static const struct v4l2_subdev_internal_ops ov5695_internal_ops = {
.open = ov5695_open,
};
#endif
static const struct v4l2_subdev_video_ops ov5695_video_ops = {
.s_stream = ov5695_s_stream,
};
static const struct v4l2_subdev_pad_ops ov5695_pad_ops = {
.enum_mbus_code = ov5695_enum_mbus_code,
.enum_frame_size = ov5695_enum_frame_sizes,
.get_fmt = ov5695_get_fmt,
.set_fmt = ov5695_set_fmt,
};
static const struct v4l2_subdev_ops ov5695_subdev_ops = {
.video = &ov5695_video_ops,
.pad = &ov5695_pad_ops,
};
static int ov5695_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov5695 *ov5695 = container_of(ctrl->handler,
struct ov5695, ctrl_handler);
struct i2c_client *client = ov5695->client;
s64 max;
int ret = 0;
/* Propagate change of current control to all related controls */
switch (ctrl->id) {
case V4L2_CID_VBLANK:
/* Update max exposure while meeting expected vblanking */
max = ov5695->cur_mode->height + ctrl->val - 4;
__v4l2_ctrl_modify_range(ov5695->exposure,
ov5695->exposure->minimum, max,
ov5695->exposure->step,
ov5695->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 = ov5695_write_reg(ov5695->client, OV5695_REG_EXPOSURE,
OV5695_REG_VALUE_24BIT, ctrl->val << 4);
break;
case V4L2_CID_ANALOGUE_GAIN:
ret = ov5695_write_reg(ov5695->client, OV5695_REG_ANALOG_GAIN,
OV5695_REG_VALUE_08BIT, ctrl->val);
break;
case V4L2_CID_DIGITAL_GAIN:
ret = ov5695_write_reg(ov5695->client, OV5695_REG_DIGI_GAIN_L,
OV5695_REG_VALUE_08BIT,
ctrl->val & OV5695_DIGI_GAIN_L_MASK);
ret = ov5695_write_reg(ov5695->client, OV5695_REG_DIGI_GAIN_H,
OV5695_REG_VALUE_08BIT,
ctrl->val >> OV5695_DIGI_GAIN_H_SHIFT);
break;
case V4L2_CID_VBLANK:
ret = ov5695_write_reg(ov5695->client, OV5695_REG_VTS,
OV5695_REG_VALUE_16BIT,
ctrl->val + ov5695->cur_mode->height);
break;
case V4L2_CID_TEST_PATTERN:
ret = ov5695_enable_test_pattern(ov5695, ctrl->val);
break;
default:
dev_warn(&client->dev, "%s Unhandled id:0x%x, val:0x%x\n",
__func__, ctrl->id, ctrl->val);
break;
}
pm_runtime_put(&client->dev);
return ret;
}
static const struct v4l2_ctrl_ops ov5695_ctrl_ops = {
.s_ctrl = ov5695_set_ctrl,
};
static int ov5695_initialize_controls(struct ov5695 *ov5695)
{
const struct ov5695_mode *mode;
struct v4l2_ctrl_handler *handler;
struct v4l2_ctrl *ctrl;
s64 exposure_max, vblank_def;
u32 h_blank;
int ret;
handler = &ov5695->ctrl_handler;
mode = ov5695->cur_mode;
ret = v4l2_ctrl_handler_init(handler, 8);
if (ret)
return ret;
handler->lock = &ov5695->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, OV5695_PIXEL_RATE, 1, OV5695_PIXEL_RATE);
h_blank = mode->hts_def - mode->width;
ov5695->hblank = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK,
h_blank, h_blank, 1, h_blank);
if (ov5695->hblank)
ov5695->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
vblank_def = mode->vts_def - mode->height;
ov5695->vblank = v4l2_ctrl_new_std(handler, &ov5695_ctrl_ops,
V4L2_CID_VBLANK, vblank_def,
OV5695_VTS_MAX - mode->height,
1, vblank_def);
exposure_max = mode->vts_def - 4;
ov5695->exposure = v4l2_ctrl_new_std(handler, &ov5695_ctrl_ops,
V4L2_CID_EXPOSURE, OV5695_EXPOSURE_MIN,
exposure_max, OV5695_EXPOSURE_STEP,
mode->exp_def);
ov5695->anal_gain = v4l2_ctrl_new_std(handler, &ov5695_ctrl_ops,
V4L2_CID_ANALOGUE_GAIN, ANALOG_GAIN_MIN,
ANALOG_GAIN_MAX, ANALOG_GAIN_STEP,
ANALOG_GAIN_DEFAULT);
/* Digital gain */
ov5695->digi_gain = v4l2_ctrl_new_std(handler, &ov5695_ctrl_ops,
V4L2_CID_DIGITAL_GAIN, OV5695_DIGI_GAIN_MIN,
OV5695_DIGI_GAIN_MAX, OV5695_DIGI_GAIN_STEP,
OV5695_DIGI_GAIN_DEFAULT);
ov5695->test_pattern = v4l2_ctrl_new_std_menu_items(handler,
&ov5695_ctrl_ops, V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(ov5695_test_pattern_menu) - 1,
0, 0, ov5695_test_pattern_menu);
if (handler->error) {
ret = handler->error;
dev_err(&ov5695->client->dev,
"Failed to init controls(%d)\n", ret);
goto err_free_handler;
}
ov5695->subdev.ctrl_handler = handler;
return 0;
err_free_handler:
v4l2_ctrl_handler_free(handler);
return ret;
}
static int ov5695_check_sensor_id(struct ov5695 *ov5695,
struct i2c_client *client)
{
struct device *dev = &ov5695->client->dev;
u32 id = 0;
int ret;
ret = ov5695_read_reg(client, OV5695_REG_CHIP_ID,
OV5695_REG_VALUE_24BIT, &id);
if (id != CHIP_ID) {
dev_err(dev, "Unexpected sensor id(%06x), ret(%d)\n", id, ret);
return ret;
}
dev_info(dev, "Detected OV%06x sensor\n", CHIP_ID);
return 0;
}
static int ov5695_configure_regulators(struct ov5695 *ov5695)
{
int i;
for (i = 0; i < OV5695_NUM_SUPPLIES; i++)
ov5695->supplies[i].supply = ov5695_supply_names[i];
return devm_regulator_bulk_get(&ov5695->client->dev,
OV5695_NUM_SUPPLIES,
ov5695->supplies);
}
static int ov5695_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct ov5695 *ov5695;
struct v4l2_subdev *sd;
int ret;
ov5695 = devm_kzalloc(dev, sizeof(*ov5695), GFP_KERNEL);
if (!ov5695)
return -ENOMEM;
ov5695->client = client;
ov5695->cur_mode = &supported_modes[0];
ov5695->xvclk = devm_clk_get(dev, "xvclk");
if (IS_ERR(ov5695->xvclk)) {
dev_err(dev, "Failed to get xvclk\n");
return -EINVAL;
}
ret = clk_set_rate(ov5695->xvclk, OV5695_XVCLK_FREQ);
if (ret < 0) {
dev_err(dev, "Failed to set xvclk rate (24MHz)\n");
return ret;
}
if (clk_get_rate(ov5695->xvclk) != OV5695_XVCLK_FREQ)
dev_warn(dev, "xvclk mismatched, modes are based on 24MHz\n");
ov5695->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(ov5695->reset_gpio)) {
dev_err(dev, "Failed to get reset-gpios\n");
return -EINVAL;
}
ret = ov5695_configure_regulators(ov5695);
if (ret) {
dev_err(dev, "Failed to get power regulators\n");
return ret;
}
mutex_init(&ov5695->mutex);
sd = &ov5695->subdev;
v4l2_i2c_subdev_init(sd, client, &ov5695_subdev_ops);
ret = ov5695_initialize_controls(ov5695);
if (ret)
goto err_destroy_mutex;
ret = __ov5695_power_on(ov5695);
if (ret)
goto err_free_handler;
ret = ov5695_check_sensor_id(ov5695, client);
if (ret)
goto err_power_off;
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
sd->internal_ops = &ov5695_internal_ops;
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
#endif
#if defined(CONFIG_MEDIA_CONTROLLER)
ov5695->pad.flags = MEDIA_PAD_FL_SOURCE;
sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
ret = media_entity_pads_init(&sd->entity, 1, &ov5695->pad);
if (ret < 0)
goto err_power_off;
#endif
ret = v4l2_async_register_subdev(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:
#if defined(CONFIG_MEDIA_CONTROLLER)
media_entity_cleanup(&sd->entity);
#endif
err_power_off:
__ov5695_power_off(ov5695);
err_free_handler:
v4l2_ctrl_handler_free(&ov5695->ctrl_handler);
err_destroy_mutex:
mutex_destroy(&ov5695->mutex);
return ret;
}
static int ov5695_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ov5695 *ov5695 = to_ov5695(sd);
v4l2_async_unregister_subdev(sd);
#if defined(CONFIG_MEDIA_CONTROLLER)
media_entity_cleanup(&sd->entity);
#endif
v4l2_ctrl_handler_free(&ov5695->ctrl_handler);
mutex_destroy(&ov5695->mutex);
pm_runtime_disable(&client->dev);
if (!pm_runtime_status_suspended(&client->dev))
__ov5695_power_off(ov5695);
pm_runtime_set_suspended(&client->dev);
return 0;
}
#if IS_ENABLED(CONFIG_OF)
static const struct of_device_id ov5695_of_match[] = {
{ .compatible = "ovti,ov5695" },
{},
};
MODULE_DEVICE_TABLE(of, ov5695_of_match);
#endif
static struct i2c_driver ov5695_i2c_driver = {
.driver = {
.name = "ov5695",
.pm = &ov5695_pm_ops,
.of_match_table = of_match_ptr(ov5695_of_match),
},
.probe = &ov5695_probe,
.remove = &ov5695_remove,
};
module_i2c_driver(ov5695_i2c_driver);
MODULE_DESCRIPTION("OmniVision ov5695 sensor driver");
MODULE_LICENSE("GPL v2");