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linux/drivers/media/i2c/ov5693.c
Daniel Scally 89aef879cb media: i2c: Add support for ov5693 sensor 
The OV5693 is a 5 Mpx CMOS image sensor, connected via MIPI CSI-2. The
chip is capable of a single lane configuration, but currently only two
lanes are supported.

Most of the sensor's features are supported, with the main exception
being the lens correction algorithm.

The driver provides all mandatory, optional and recommended V4L2 controls
for maximum compatibility with libcamera.

[mchehab: fixed a coding style warning]

Signed-off-by: Daniel Scally <djrscally@gmail.com>
Tested-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2021-11-30 10:50:51 +01:00

1538 lines
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2013 Intel Corporation. All Rights Reserved.
*
* Adapted from the atomisp-ov5693 driver, with contributions from:
*
* Daniel Scally
* Jean-Michel Hautbois
* Fabian Wuthrich
* Tsuchiya Yuto
* Jordan Hand
* Jake Day
*/
#include <asm/unaligned.h>
#include <linux/acpi.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-fwnode.h>
#define OV5693_REG_8BIT(n) ((1 << 16) | (n))
#define OV5693_REG_16BIT(n) ((2 << 16) | (n))
#define OV5693_REG_24BIT(n) ((3 << 16) | (n))
#define OV5693_REG_SIZE_SHIFT 16
#define OV5693_REG_ADDR_MASK 0xffff
/* System Control */
#define OV5693_SW_RESET_REG OV5693_REG_8BIT(0x0103)
#define OV5693_SW_STREAM_REG OV5693_REG_8BIT(0x0100)
#define OV5693_START_STREAMING 0x01
#define OV5693_STOP_STREAMING 0x00
#define OV5693_SW_RESET 0x01
#define OV5693_REG_CHIP_ID OV5693_REG_16BIT(0x300a)
/* Yes, this is right. The datasheet for the OV5693 gives its ID as 0x5690 */
#define OV5693_CHIP_ID 0x5690
/* Exposure */
#define OV5693_EXPOSURE_CTRL_REG OV5693_REG_24BIT(0x3500)
#define OV5693_EXPOSURE_CTRL_MASK GENMASK(19, 4)
#define OV5693_INTEGRATION_TIME_MARGIN 8
#define OV5693_EXPOSURE_MIN 1
#define OV5693_EXPOSURE_STEP 1
/* Analogue Gain */
#define OV5693_GAIN_CTRL_REG OV5693_REG_16BIT(0x350a)
#define OV5693_GAIN_CTRL_MASK GENMASK(10, 4)
#define OV5693_GAIN_MIN 1
#define OV5693_GAIN_MAX 127
#define OV5693_GAIN_DEF 8
#define OV5693_GAIN_STEP 1
/* Digital Gain */
#define OV5693_MWB_RED_GAIN_REG OV5693_REG_16BIT(0x3400)
#define OV5693_MWB_GREEN_GAIN_REG OV5693_REG_16BIT(0x3402)
#define OV5693_MWB_BLUE_GAIN_REG OV5693_REG_16BIT(0x3404)
#define OV5693_MWB_GAIN_MASK GENMASK(11, 0)
#define OV5693_MWB_GAIN_MAX 0x0fff
#define OV5693_DIGITAL_GAIN_MIN 1
#define OV5693_DIGITAL_GAIN_MAX 4095
#define OV5693_DIGITAL_GAIN_DEF 1024
#define OV5693_DIGITAL_GAIN_STEP 1
/* Timing and Format */
#define OV5693_CROP_START_X_REG OV5693_REG_16BIT(0x3800)
#define OV5693_CROP_START_Y_REG OV5693_REG_16BIT(0x3802)
#define OV5693_CROP_END_X_REG OV5693_REG_16BIT(0x3804)
#define OV5693_CROP_END_Y_REG OV5693_REG_16BIT(0x3806)
#define OV5693_OUTPUT_SIZE_X_REG OV5693_REG_16BIT(0x3808)
#define OV5693_OUTPUT_SIZE_Y_REG OV5693_REG_16BIT(0x380a)
#define OV5693_TIMING_HTS_REG OV5693_REG_16BIT(0x380c)
#define OV5693_FIXED_PPL 2688U
#define OV5693_TIMING_VTS_REG OV5693_REG_16BIT(0x380e)
#define OV5693_TIMING_MAX_VTS 0xffff
#define OV5693_TIMING_MIN_VTS 0x04
#define OV5693_OFFSET_START_X_REG OV5693_REG_16BIT(0x3810)
#define OV5693_OFFSET_START_Y_REG OV5693_REG_16BIT(0x3812)
#define OV5693_SUB_INC_X_REG OV5693_REG_8BIT(0x3814)
#define OV5693_SUB_INC_Y_REG OV5693_REG_8BIT(0x3815)
#define OV5693_FORMAT1_REG OV5693_REG_8BIT(0x3820)
#define OV5693_FORMAT1_FLIP_VERT_ISP_EN BIT(6)
#define OV5693_FORMAT1_FLIP_VERT_SENSOR_EN BIT(1)
#define OV5693_FORMAT1_VBIN_EN BIT(0)
#define OV5693_FORMAT2_REG OV5693_REG_8BIT(0x3821)
#define OV5693_FORMAT2_HDR_EN BIT(7)
#define OV5693_FORMAT2_FLIP_HORZ_ISP_EN BIT(2)
#define OV5693_FORMAT2_FLIP_HORZ_SENSOR_EN BIT(1)
#define OV5693_FORMAT2_HBIN_EN BIT(0)
#define OV5693_ISP_CTRL2_REG OV5693_REG_8BIT(0x5002)
#define OV5693_ISP_SCALE_ENABLE BIT(7)
/* Pixel Array */
#define OV5693_NATIVE_WIDTH 2624
#define OV5693_NATIVE_HEIGHT 1956
#define OV5693_NATIVE_START_LEFT 0
#define OV5693_NATIVE_START_TOP 0
#define OV5693_ACTIVE_WIDTH 2592
#define OV5693_ACTIVE_HEIGHT 1944
#define OV5693_ACTIVE_START_LEFT 16
#define OV5693_ACTIVE_START_TOP 6
#define OV5693_MIN_CROP_WIDTH 2
#define OV5693_MIN_CROP_HEIGHT 2
/* Test Pattern */
#define OV5693_TEST_PATTERN_REG OV5693_REG_8BIT(0x5e00)
#define OV5693_TEST_PATTERN_ENABLE BIT(7)
#define OV5693_TEST_PATTERN_ROLLING BIT(6)
#define OV5693_TEST_PATTERN_RANDOM 0x01
#define OV5693_TEST_PATTERN_BARS 0x00
/* System Frequencies */
#define OV5693_XVCLK_FREQ 19200000
#define OV5693_LINK_FREQ_419_2MHZ 419200000
#define OV5693_PIXEL_RATE 167680000
/* Miscellaneous */
#define OV5693_NUM_SUPPLIES 2
#define to_ov5693_sensor(x) container_of(x, struct ov5693_device, sd)
struct ov5693_reg {
u32 reg;
u8 val;
};
struct ov5693_reg_list {
u32 num_regs;
const struct ov5693_reg *regs;
};
struct ov5693_device {
struct i2c_client *client;
struct device *dev;
/* Protect against concurrent changes to controls */
struct mutex lock;
struct gpio_desc *reset;
struct gpio_desc *powerdown;
struct regulator_bulk_data supplies[OV5693_NUM_SUPPLIES];
struct clk *clk;
struct ov5693_mode {
struct v4l2_rect crop;
struct v4l2_mbus_framefmt format;
bool binning_x;
bool binning_y;
unsigned int inc_x_odd;
unsigned int inc_y_odd;
unsigned int vts;
} mode;
bool streaming;
struct v4l2_subdev sd;
struct media_pad pad;
struct ov5693_v4l2_ctrls {
struct v4l2_ctrl_handler handler;
struct v4l2_ctrl *link_freq;
struct v4l2_ctrl *pixel_rate;
struct v4l2_ctrl *exposure;
struct v4l2_ctrl *analogue_gain;
struct v4l2_ctrl *digital_gain;
struct v4l2_ctrl *hflip;
struct v4l2_ctrl *vflip;
struct v4l2_ctrl *hblank;
struct v4l2_ctrl *vblank;
struct v4l2_ctrl *test_pattern;
} ctrls;
};
static const struct ov5693_reg ov5693_global_regs[] = {
{OV5693_REG_8BIT(0x3016), 0xf0},
{OV5693_REG_8BIT(0x3017), 0xf0},
{OV5693_REG_8BIT(0x3018), 0xf0},
{OV5693_REG_8BIT(0x3022), 0x01},
{OV5693_REG_8BIT(0x3028), 0x44},
{OV5693_REG_8BIT(0x3098), 0x02},
{OV5693_REG_8BIT(0x3099), 0x19},
{OV5693_REG_8BIT(0x309a), 0x02},
{OV5693_REG_8BIT(0x309b), 0x01},
{OV5693_REG_8BIT(0x309c), 0x00},
{OV5693_REG_8BIT(0x30a0), 0xd2},
{OV5693_REG_8BIT(0x30a2), 0x01},
{OV5693_REG_8BIT(0x30b2), 0x00},
{OV5693_REG_8BIT(0x30b3), 0x83},
{OV5693_REG_8BIT(0x30b4), 0x03},
{OV5693_REG_8BIT(0x30b5), 0x04},
{OV5693_REG_8BIT(0x30b6), 0x01},
{OV5693_REG_8BIT(0x3080), 0x01},
{OV5693_REG_8BIT(0x3104), 0x21},
{OV5693_REG_8BIT(0x3106), 0x00},
{OV5693_REG_8BIT(0x3406), 0x01},
{OV5693_REG_8BIT(0x3503), 0x07},
{OV5693_REG_8BIT(0x350b), 0x40},
{OV5693_REG_8BIT(0x3601), 0x0a},
{OV5693_REG_8BIT(0x3602), 0x38},
{OV5693_REG_8BIT(0x3612), 0x80},
{OV5693_REG_8BIT(0x3620), 0x54},
{OV5693_REG_8BIT(0x3621), 0xc7},
{OV5693_REG_8BIT(0x3622), 0x0f},
{OV5693_REG_8BIT(0x3625), 0x10},
{OV5693_REG_8BIT(0x3630), 0x55},
{OV5693_REG_8BIT(0x3631), 0xf4},
{OV5693_REG_8BIT(0x3632), 0x00},
{OV5693_REG_8BIT(0x3633), 0x34},
{OV5693_REG_8BIT(0x3634), 0x02},
{OV5693_REG_8BIT(0x364d), 0x0d},
{OV5693_REG_8BIT(0x364f), 0xdd},
{OV5693_REG_8BIT(0x3660), 0x04},
{OV5693_REG_8BIT(0x3662), 0x10},
{OV5693_REG_8BIT(0x3663), 0xf1},
{OV5693_REG_8BIT(0x3665), 0x00},
{OV5693_REG_8BIT(0x3666), 0x20},
{OV5693_REG_8BIT(0x3667), 0x00},
{OV5693_REG_8BIT(0x366a), 0x80},
{OV5693_REG_8BIT(0x3680), 0xe0},
{OV5693_REG_8BIT(0x3681), 0x00},
{OV5693_REG_8BIT(0x3700), 0x42},
{OV5693_REG_8BIT(0x3701), 0x14},
{OV5693_REG_8BIT(0x3702), 0xa0},
{OV5693_REG_8BIT(0x3703), 0xd8},
{OV5693_REG_8BIT(0x3704), 0x78},
{OV5693_REG_8BIT(0x3705), 0x02},
{OV5693_REG_8BIT(0x370a), 0x00},
{OV5693_REG_8BIT(0x370b), 0x20},
{OV5693_REG_8BIT(0x370c), 0x0c},
{OV5693_REG_8BIT(0x370d), 0x11},
{OV5693_REG_8BIT(0x370e), 0x00},
{OV5693_REG_8BIT(0x370f), 0x40},
{OV5693_REG_8BIT(0x3710), 0x00},
{OV5693_REG_8BIT(0x371a), 0x1c},
{OV5693_REG_8BIT(0x371b), 0x05},
{OV5693_REG_8BIT(0x371c), 0x01},
{OV5693_REG_8BIT(0x371e), 0xa1},
{OV5693_REG_8BIT(0x371f), 0x0c},
{OV5693_REG_8BIT(0x3721), 0x00},
{OV5693_REG_8BIT(0x3724), 0x10},
{OV5693_REG_8BIT(0x3726), 0x00},
{OV5693_REG_8BIT(0x372a), 0x01},
{OV5693_REG_8BIT(0x3730), 0x10},
{OV5693_REG_8BIT(0x3738), 0x22},
{OV5693_REG_8BIT(0x3739), 0xe5},
{OV5693_REG_8BIT(0x373a), 0x50},
{OV5693_REG_8BIT(0x373b), 0x02},
{OV5693_REG_8BIT(0x373c), 0x41},
{OV5693_REG_8BIT(0x373f), 0x02},
{OV5693_REG_8BIT(0x3740), 0x42},
{OV5693_REG_8BIT(0x3741), 0x02},
{OV5693_REG_8BIT(0x3742), 0x18},
{OV5693_REG_8BIT(0x3743), 0x01},
{OV5693_REG_8BIT(0x3744), 0x02},
{OV5693_REG_8BIT(0x3747), 0x10},
{OV5693_REG_8BIT(0x374c), 0x04},
{OV5693_REG_8BIT(0x3751), 0xf0},
{OV5693_REG_8BIT(0x3752), 0x00},
{OV5693_REG_8BIT(0x3753), 0x00},
{OV5693_REG_8BIT(0x3754), 0xc0},
{OV5693_REG_8BIT(0x3755), 0x00},
{OV5693_REG_8BIT(0x3756), 0x1a},
{OV5693_REG_8BIT(0x3758), 0x00},
{OV5693_REG_8BIT(0x3759), 0x0f},
{OV5693_REG_8BIT(0x376b), 0x44},
{OV5693_REG_8BIT(0x375c), 0x04},
{OV5693_REG_8BIT(0x3774), 0x10},
{OV5693_REG_8BIT(0x3776), 0x00},
{OV5693_REG_8BIT(0x377f), 0x08},
{OV5693_REG_8BIT(0x3780), 0x22},
{OV5693_REG_8BIT(0x3781), 0x0c},
{OV5693_REG_8BIT(0x3784), 0x2c},
{OV5693_REG_8BIT(0x3785), 0x1e},
{OV5693_REG_8BIT(0x378f), 0xf5},
{OV5693_REG_8BIT(0x3791), 0xb0},
{OV5693_REG_8BIT(0x3795), 0x00},
{OV5693_REG_8BIT(0x3796), 0x64},
{OV5693_REG_8BIT(0x3797), 0x11},
{OV5693_REG_8BIT(0x3798), 0x30},
{OV5693_REG_8BIT(0x3799), 0x41},
{OV5693_REG_8BIT(0x379a), 0x07},
{OV5693_REG_8BIT(0x379b), 0xb0},
{OV5693_REG_8BIT(0x379c), 0x0c},
{OV5693_REG_8BIT(0x3a04), 0x06},
{OV5693_REG_8BIT(0x3a05), 0x14},
{OV5693_REG_8BIT(0x3e07), 0x20},
{OV5693_REG_8BIT(0x4000), 0x08},
{OV5693_REG_8BIT(0x4001), 0x04},
{OV5693_REG_8BIT(0x4004), 0x08},
{OV5693_REG_8BIT(0x4006), 0x20},
{OV5693_REG_8BIT(0x4008), 0x24},
{OV5693_REG_8BIT(0x4009), 0x10},
{OV5693_REG_8BIT(0x4058), 0x00},
{OV5693_REG_8BIT(0x4101), 0xb2},
{OV5693_REG_8BIT(0x4307), 0x31},
{OV5693_REG_8BIT(0x4511), 0x05},
{OV5693_REG_8BIT(0x4512), 0x01},
{OV5693_REG_8BIT(0x481f), 0x30},
{OV5693_REG_8BIT(0x4826), 0x2c},
{OV5693_REG_8BIT(0x4d02), 0xfd},
{OV5693_REG_8BIT(0x4d03), 0xf5},
{OV5693_REG_8BIT(0x4d04), 0x0c},
{OV5693_REG_8BIT(0x4d05), 0xcc},
{OV5693_REG_8BIT(0x4837), 0x0a},
{OV5693_REG_8BIT(0x5003), 0x20},
{OV5693_REG_8BIT(0x5013), 0x00},
{OV5693_REG_8BIT(0x5842), 0x01},
{OV5693_REG_8BIT(0x5843), 0x2b},
{OV5693_REG_8BIT(0x5844), 0x01},
{OV5693_REG_8BIT(0x5845), 0x92},
{OV5693_REG_8BIT(0x5846), 0x01},
{OV5693_REG_8BIT(0x5847), 0x8f},
{OV5693_REG_8BIT(0x5848), 0x01},
{OV5693_REG_8BIT(0x5849), 0x0c},
{OV5693_REG_8BIT(0x5e10), 0x0c},
{OV5693_REG_8BIT(0x3820), 0x00},
{OV5693_REG_8BIT(0x3821), 0x1e},
{OV5693_REG_8BIT(0x5041), 0x14}
};
static const struct ov5693_reg_list ov5693_global_setting = {
.num_regs = ARRAY_SIZE(ov5693_global_regs),
.regs = ov5693_global_regs,
};
static const struct v4l2_rect ov5693_default_crop = {
.left = OV5693_ACTIVE_START_LEFT,
.top = OV5693_ACTIVE_START_TOP,
.width = OV5693_ACTIVE_WIDTH,
.height = OV5693_ACTIVE_HEIGHT,
};
static const struct v4l2_mbus_framefmt ov5693_default_fmt = {
.width = OV5693_ACTIVE_WIDTH,
.height = OV5693_ACTIVE_HEIGHT,
.code = MEDIA_BUS_FMT_SBGGR10_1X10,
};
static const s64 link_freq_menu_items[] = {
OV5693_LINK_FREQ_419_2MHZ
};
static const char * const ov5693_supply_names[] = {
"avdd",
"dovdd",
};
static const char * const ov5693_test_pattern_menu[] = {
"Disabled",
"Random Data",
"Colour Bars",
"Colour Bars with Rolling Bar"
};
static const u8 ov5693_test_pattern_bits[] = {
0,
OV5693_TEST_PATTERN_ENABLE | OV5693_TEST_PATTERN_RANDOM,
OV5693_TEST_PATTERN_ENABLE | OV5693_TEST_PATTERN_BARS,
OV5693_TEST_PATTERN_ENABLE | OV5693_TEST_PATTERN_BARS |
OV5693_TEST_PATTERN_ROLLING,
};
/* I2C I/O Operations */
static int ov5693_read_reg(struct ov5693_device *ov5693, u32 addr, u32 *value)
{
struct i2c_client *client = ov5693->client;
__be16 reg;
u8 val[4];
struct i2c_msg msg[] = {
{
.addr = client->addr,
.flags = 0,
.len = 2,
.buf = (u8 *)&reg,
},
{
.addr = client->addr,
.flags = I2C_M_RD,
.buf = (u8 *)&val,
},
};
unsigned int len = ((addr >> OV5693_REG_SIZE_SHIFT) & 3);
unsigned int i;
int ret;
reg = cpu_to_be16(addr & OV5693_REG_ADDR_MASK);
msg[1].len = len;
ret = i2c_transfer(client->adapter, msg, 2);
if (ret < 0)
return dev_err_probe(&client->dev, ret,
"Failed to read register 0x%04x: %d\n",
addr & OV5693_REG_ADDR_MASK, ret);
*value = 0;
for (i = 0; i < len; ++i) {
*value <<= 8;
*value |= val[i];
}
return 0;
}
static void ov5693_write_reg(struct ov5693_device *ov5693, u32 addr, u32 value,
int *error)
{
struct i2c_client *client = ov5693->client;
struct {
__be16 reg;
u8 val[4];
} __packed buf;
struct i2c_msg msg = {
.addr = client->addr,
.buf = (u8 *)&buf,
};
unsigned int len = ((addr >> OV5693_REG_SIZE_SHIFT) & 3);
unsigned int i;
int ret;
if (*error < 0)
return;
buf.reg = cpu_to_be16(addr & OV5693_REG_ADDR_MASK);
for (i = 0; i < len; ++i) {
buf.val[len - i - 1] = value & 0xff;
value >>= 8;
}
msg.len = len + 2;
ret = i2c_transfer(client->adapter, &msg, 1);
if (ret < 0) {
dev_err(&client->dev, "Failed to write register 0x%04x: %d\n",
addr & OV5693_REG_ADDR_MASK, ret);
*error = ret;
}
}
static int ov5693_write_reg_array(struct ov5693_device *ov5693,
const struct ov5693_reg_list *reglist)
{
unsigned int i;
int ret = 0;
for (i = 0; i < reglist->num_regs; i++)
ov5693_write_reg(ov5693, reglist->regs[i].reg,
reglist->regs[i].val, &ret);
return ret;
}
static int ov5693_update_bits(struct ov5693_device *ov5693, u32 address,
u32 mask, u32 bits)
{
u32 value = 0;
int ret;
ret = ov5693_read_reg(ov5693, address, &value);
if (ret)
return ret;
value &= ~mask;
value |= bits;
ov5693_write_reg(ov5693, address, value, &ret);
return ret;
}
/* V4L2 Controls Functions */
static int ov5693_flip_vert_configure(struct ov5693_device *ov5693,
bool enable)
{
u8 bits = OV5693_FORMAT1_FLIP_VERT_ISP_EN |
OV5693_FORMAT1_FLIP_VERT_SENSOR_EN;
int ret;
ret = ov5693_update_bits(ov5693, OV5693_FORMAT1_REG, bits,
enable ? bits : 0);
if (ret)
return ret;
return 0;
}
static int ov5693_flip_horz_configure(struct ov5693_device *ov5693,
bool enable)
{
u8 bits = OV5693_FORMAT2_FLIP_HORZ_ISP_EN |
OV5693_FORMAT2_FLIP_HORZ_SENSOR_EN;
int ret;
ret = ov5693_update_bits(ov5693, OV5693_FORMAT2_REG, bits,
enable ? bits : 0);
if (ret)
return ret;
return 0;
}
static int ov5693_get_exposure(struct ov5693_device *ov5693, s32 *value)
{
u32 exposure;
int ret;
ret = ov5693_read_reg(ov5693, OV5693_EXPOSURE_CTRL_REG, &exposure);
if (ret)
return ret;
/* The lowest 4 bits are unsupported fractional bits */
*value = exposure >> 4;
return 0;
}
static int ov5693_exposure_configure(struct ov5693_device *ov5693,
u32 exposure)
{
int ret = 0;
exposure = (exposure << 4) & OV5693_EXPOSURE_CTRL_MASK;
ov5693_write_reg(ov5693, OV5693_EXPOSURE_CTRL_REG, exposure, &ret);
return ret;
}
static int ov5693_get_gain(struct ov5693_device *ov5693, u32 *gain)
{
u32 value;
int ret;
ret = ov5693_read_reg(ov5693, OV5693_GAIN_CTRL_REG, &value);
if (ret)
return ret;
/* As with exposure, the lowest 4 bits are fractional bits. */
*gain = value >> 4;
return ret;
}
static int ov5693_digital_gain_configure(struct ov5693_device *ov5693,
u32 gain)
{
int ret = 0;
gain &= OV5693_MWB_GAIN_MASK;
ov5693_write_reg(ov5693, OV5693_MWB_RED_GAIN_REG, gain, &ret);
ov5693_write_reg(ov5693, OV5693_MWB_GREEN_GAIN_REG, gain, &ret);
ov5693_write_reg(ov5693, OV5693_MWB_BLUE_GAIN_REG, gain, &ret);
return ret;
}
static int ov5693_analog_gain_configure(struct ov5693_device *ov5693, u32 gain)
{
int ret = 0;
gain = (gain << 4) & OV5693_GAIN_CTRL_MASK;
ov5693_write_reg(ov5693, OV5693_GAIN_CTRL_REG, gain, &ret);
return ret;
}
static int ov5693_vts_configure(struct ov5693_device *ov5693, u32 vblank)
{
u16 vts = ov5693->mode.format.height + vblank;
int ret = 0;
ov5693_write_reg(ov5693, OV5693_TIMING_VTS_REG, vts, &ret);
return ret;
}
static int ov5693_test_pattern_configure(struct ov5693_device *ov5693, u32 idx)
{
int ret = 0;
ov5693_write_reg(ov5693, OV5693_TEST_PATTERN_REG,
ov5693_test_pattern_bits[idx], &ret);
return ret;
}
static int ov5693_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov5693_device *ov5693 =
container_of(ctrl->handler, struct ov5693_device, ctrls.handler);
int ret = 0;
/* If VBLANK is altered we need to update exposure to compensate */
if (ctrl->id == V4L2_CID_VBLANK) {
int exposure_max;
exposure_max = ov5693->mode.format.height + ctrl->val -
OV5693_INTEGRATION_TIME_MARGIN;
__v4l2_ctrl_modify_range(ov5693->ctrls.exposure,
ov5693->ctrls.exposure->minimum,
exposure_max,
ov5693->ctrls.exposure->step,
min(ov5693->ctrls.exposure->val,
exposure_max));
}
/* Only apply changes to the controls if the device is powered up */
if (!pm_runtime_get_if_in_use(ov5693->dev))
return 0;
switch (ctrl->id) {
case V4L2_CID_EXPOSURE:
ret = ov5693_exposure_configure(ov5693, ctrl->val);
break;
case V4L2_CID_ANALOGUE_GAIN:
ret = ov5693_analog_gain_configure(ov5693, ctrl->val);
break;
case V4L2_CID_DIGITAL_GAIN:
ret = ov5693_digital_gain_configure(ov5693, ctrl->val);
break;
case V4L2_CID_HFLIP:
ret = ov5693_flip_horz_configure(ov5693, !!ctrl->val);
break;
case V4L2_CID_VFLIP:
ret = ov5693_flip_vert_configure(ov5693, !!ctrl->val);
break;
case V4L2_CID_VBLANK:
ret = ov5693_vts_configure(ov5693, ctrl->val);
break;
case V4L2_CID_TEST_PATTERN:
ret = ov5693_test_pattern_configure(ov5693, ctrl->val);
break;
default:
ret = -EINVAL;
}
pm_runtime_put(ov5693->dev);
return ret;
}
static int ov5693_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov5693_device *ov5693 = container_of(ctrl->handler,
struct ov5693_device,
ctrls.handler);
switch (ctrl->id) {
case V4L2_CID_EXPOSURE_ABSOLUTE:
return ov5693_get_exposure(ov5693, &ctrl->val);
case V4L2_CID_AUTOGAIN:
return ov5693_get_gain(ov5693, &ctrl->val);
default:
return -EINVAL;
}
}
static const struct v4l2_ctrl_ops ov5693_ctrl_ops = {
.s_ctrl = ov5693_s_ctrl,
.g_volatile_ctrl = ov5693_g_volatile_ctrl
};
/* System Control Functions */
static int ov5693_mode_configure(struct ov5693_device *ov5693)
{
const struct ov5693_mode *mode = &ov5693->mode;
int ret = 0;
/* Crop Start X */
ov5693_write_reg(ov5693, OV5693_CROP_START_X_REG, mode->crop.left,
&ret);
/* Offset X */
ov5693_write_reg(ov5693, OV5693_OFFSET_START_X_REG, 0, &ret);
/* Output Size X */
ov5693_write_reg(ov5693, OV5693_OUTPUT_SIZE_X_REG, mode->format.width,
&ret);
/* Crop End X */
ov5693_write_reg(ov5693, OV5693_CROP_END_X_REG,
mode->crop.left + mode->crop.width, &ret);
/* Horizontal Total Size */
ov5693_write_reg(ov5693, OV5693_TIMING_HTS_REG, OV5693_FIXED_PPL,
&ret);
/* Crop Start Y */
ov5693_write_reg(ov5693, OV5693_CROP_START_Y_REG, mode->crop.top,
&ret);
/* Offset Y */
ov5693_write_reg(ov5693, OV5693_OFFSET_START_Y_REG, 0, &ret);
/* Output Size Y */
ov5693_write_reg(ov5693, OV5693_OUTPUT_SIZE_Y_REG, mode->format.height,
&ret);
/* Crop End Y */
ov5693_write_reg(ov5693, OV5693_CROP_END_Y_REG,
mode->crop.top + mode->crop.height, &ret);
/* Subsample X increase */
ov5693_write_reg(ov5693, OV5693_SUB_INC_X_REG,
((mode->inc_x_odd << 4) & 0xf0) | 0x01, &ret);
/* Subsample Y increase */
ov5693_write_reg(ov5693, OV5693_SUB_INC_Y_REG,
((mode->inc_y_odd << 4) & 0xf0) | 0x01, &ret);
if (ret)
return ret;
/* Binning */
ret = ov5693_update_bits(ov5693, OV5693_FORMAT1_REG,
OV5693_FORMAT1_VBIN_EN,
mode->binning_y ? OV5693_FORMAT1_VBIN_EN : 0);
if (ret)
return ret;
ret = ov5693_update_bits(ov5693, OV5693_FORMAT2_REG,
OV5693_FORMAT2_HBIN_EN,
mode->binning_x ? OV5693_FORMAT2_HBIN_EN : 0);
return ret;
}
static int ov5693_enable_streaming(struct ov5693_device *ov5693, bool enable)
{
int ret = 0;
ov5693_write_reg(ov5693, OV5693_SW_STREAM_REG,
enable ? OV5693_START_STREAMING :
OV5693_STOP_STREAMING, &ret);
return ret;
}
static int ov5693_sw_reset(struct ov5693_device *ov5693)
{
int ret = 0;
ov5693_write_reg(ov5693, OV5693_SW_RESET_REG, OV5693_SW_RESET, &ret);
return ret;
}
static int ov5693_sensor_init(struct ov5693_device *ov5693)
{
int ret;
ret = ov5693_sw_reset(ov5693);
if (ret)
return dev_err_probe(ov5693->dev, ret,
"software reset error\n");
ret = ov5693_write_reg_array(ov5693, &ov5693_global_setting);
if (ret)
return dev_err_probe(ov5693->dev, ret,
"global settings error\n");
ret = ov5693_mode_configure(ov5693);
if (ret)
return dev_err_probe(ov5693->dev, ret,
"mode configure error\n");
ret = ov5693_enable_streaming(ov5693, false);
if (ret)
dev_err(ov5693->dev, "stop streaming error\n");
return ret;
}
static void ov5693_sensor_powerdown(struct ov5693_device *ov5693)
{
gpiod_set_value_cansleep(ov5693->reset, 1);
gpiod_set_value_cansleep(ov5693->powerdown, 1);
regulator_bulk_disable(OV5693_NUM_SUPPLIES, ov5693->supplies);
clk_disable_unprepare(ov5693->clk);
}
static int ov5693_sensor_powerup(struct ov5693_device *ov5693)
{
int ret;
gpiod_set_value_cansleep(ov5693->reset, 1);
gpiod_set_value_cansleep(ov5693->powerdown, 1);
ret = clk_prepare_enable(ov5693->clk);
if (ret) {
dev_err(ov5693->dev, "Failed to enable clk\n");
goto fail_power;
}
ret = regulator_bulk_enable(OV5693_NUM_SUPPLIES, ov5693->supplies);
if (ret) {
dev_err(ov5693->dev, "Failed to enable regulators\n");
goto fail_power;
}
gpiod_set_value_cansleep(ov5693->powerdown, 0);
gpiod_set_value_cansleep(ov5693->reset, 0);
usleep_range(5000, 7500);
return 0;
fail_power:
ov5693_sensor_powerdown(ov5693);
return ret;
}
static int __maybe_unused ov5693_sensor_suspend(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct ov5693_device *ov5693 = to_ov5693_sensor(sd);
ov5693_sensor_powerdown(ov5693);
return 0;
}
static int __maybe_unused ov5693_sensor_resume(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct ov5693_device *ov5693 = to_ov5693_sensor(sd);
int ret;
mutex_lock(&ov5693->lock);
ret = ov5693_sensor_powerup(ov5693);
if (ret)
goto out_unlock;
ret = ov5693_sensor_init(ov5693);
if (ret) {
dev_err(dev, "ov5693 sensor init failure\n");
goto err_power;
}
goto out_unlock;
err_power:
ov5693_sensor_powerdown(ov5693);
out_unlock:
mutex_unlock(&ov5693->lock);
return ret;
}
static int ov5693_detect(struct ov5693_device *ov5693)
{
int ret;
u32 id;
ret = ov5693_read_reg(ov5693, OV5693_REG_CHIP_ID, &id);
if (ret)
return ret;
if (id != OV5693_CHIP_ID)
return dev_err_probe(ov5693->dev, -ENODEV,
"sensor ID mismatch. Found 0x%04x\n", id);
return 0;
}
/* V4L2 Framework callbacks */
static unsigned int __ov5693_calc_vts(u32 height)
{
/*
* We need to set a sensible default VTS for whatever format height we
* happen to be given from set_fmt(). This function just targets
* an even multiple of 30fps.
*/
unsigned int tgt_fps;
tgt_fps = rounddown(OV5693_PIXEL_RATE / OV5693_FIXED_PPL / height, 30);
return ALIGN_DOWN(OV5693_PIXEL_RATE / OV5693_FIXED_PPL / tgt_fps, 2);
}
static struct v4l2_mbus_framefmt *
__ov5693_get_pad_format(struct ov5693_device *ov5693,
struct v4l2_subdev_state *state,
unsigned int pad, enum v4l2_subdev_format_whence which)
{
switch (which) {
case V4L2_SUBDEV_FORMAT_TRY:
return v4l2_subdev_get_try_format(&ov5693->sd, state, pad);
case V4L2_SUBDEV_FORMAT_ACTIVE:
return &ov5693->mode.format;
default:
return NULL;
}
}
static struct v4l2_rect *
__ov5693_get_pad_crop(struct ov5693_device *ov5693,
struct v4l2_subdev_state *state,
unsigned int pad, enum v4l2_subdev_format_whence which)
{
switch (which) {
case V4L2_SUBDEV_FORMAT_TRY:
return v4l2_subdev_get_try_crop(&ov5693->sd, state, pad);
case V4L2_SUBDEV_FORMAT_ACTIVE:
return &ov5693->mode.crop;
}
return NULL;
}
static int ov5693_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
struct v4l2_subdev_format *format)
{
struct ov5693_device *ov5693 = to_ov5693_sensor(sd);
format->format = ov5693->mode.format;
return 0;
}
static int ov5693_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
struct v4l2_subdev_format *format)
{
struct ov5693_device *ov5693 = to_ov5693_sensor(sd);
const struct v4l2_rect *crop;
struct v4l2_mbus_framefmt *fmt;
unsigned int hratio, vratio;
unsigned int width, height;
unsigned int hblank;
int exposure_max;
int ret = 0;
crop = __ov5693_get_pad_crop(ov5693, state, format->pad, format->which);
/*
* Align to two to simplify the binning calculations below, and clamp
* the requested format at the crop rectangle
*/
width = clamp_t(unsigned int, ALIGN(format->format.width, 2),
OV5693_MIN_CROP_WIDTH, crop->width);
height = clamp_t(unsigned int, ALIGN(format->format.height, 2),
OV5693_MIN_CROP_HEIGHT, crop->height);
/*
* We can only support setting either the dimensions of the crop rect
* or those dimensions binned (separately) by a factor of two.
*/
hratio = clamp_t(unsigned int,
DIV_ROUND_CLOSEST(crop->width, width), 1, 2);
vratio = clamp_t(unsigned int,
DIV_ROUND_CLOSEST(crop->height, height), 1, 2);
fmt = __ov5693_get_pad_format(ov5693, state, format->pad,
format->which);
fmt->width = crop->width / hratio;
fmt->height = crop->height / vratio;
fmt->code = MEDIA_BUS_FMT_SBGGR10_1X10;
format->format = *fmt;
if (format->which == V4L2_SUBDEV_FORMAT_TRY)
return ret;
mutex_lock(&ov5693->lock);
ov5693->mode.binning_x = hratio > 1 ? true : false;
ov5693->mode.inc_x_odd = hratio > 1 ? 3 : 1;
ov5693->mode.binning_y = vratio > 1 ? true : false;
ov5693->mode.inc_y_odd = vratio > 1 ? 3 : 1;
ov5693->mode.vts = __ov5693_calc_vts(fmt->height);
__v4l2_ctrl_modify_range(ov5693->ctrls.vblank,
OV5693_TIMING_MIN_VTS,
OV5693_TIMING_MAX_VTS - fmt->height,
1, ov5693->mode.vts - fmt->height);
__v4l2_ctrl_s_ctrl(ov5693->ctrls.vblank,
ov5693->mode.vts - fmt->height);
hblank = OV5693_FIXED_PPL - fmt->width;
__v4l2_ctrl_modify_range(ov5693->ctrls.hblank, hblank, hblank, 1,
hblank);
exposure_max = ov5693->mode.vts - OV5693_INTEGRATION_TIME_MARGIN;
__v4l2_ctrl_modify_range(ov5693->ctrls.exposure,
ov5693->ctrls.exposure->minimum, exposure_max,
ov5693->ctrls.exposure->step,
min(ov5693->ctrls.exposure->val,
exposure_max));
mutex_unlock(&ov5693->lock);
return ret;
}
static int ov5693_get_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
struct v4l2_subdev_selection *sel)
{
struct ov5693_device *ov5693 = to_ov5693_sensor(sd);
switch (sel->target) {
case V4L2_SEL_TGT_CROP:
mutex_lock(&ov5693->lock);
sel->r = *__ov5693_get_pad_crop(ov5693, state, sel->pad,
sel->which);
mutex_unlock(&ov5693->lock);
break;
case V4L2_SEL_TGT_NATIVE_SIZE:
sel->r.top = 0;
sel->r.left = 0;
sel->r.width = OV5693_NATIVE_WIDTH;
sel->r.height = OV5693_NATIVE_HEIGHT;
break;
case V4L2_SEL_TGT_CROP_BOUNDS:
case V4L2_SEL_TGT_CROP_DEFAULT:
sel->r.top = OV5693_ACTIVE_START_TOP;
sel->r.left = OV5693_ACTIVE_START_LEFT;
sel->r.width = OV5693_ACTIVE_WIDTH;
sel->r.height = OV5693_ACTIVE_HEIGHT;
break;
default:
return -EINVAL;
}
return 0;
}
static int ov5693_set_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
struct v4l2_subdev_selection *sel)
{
struct ov5693_device *ov5693 = to_ov5693_sensor(sd);
struct v4l2_mbus_framefmt *format;
struct v4l2_rect *__crop;
struct v4l2_rect rect;
if (sel->target != V4L2_SEL_TGT_CROP)
return -EINVAL;
/*
* Clamp the boundaries of the crop rectangle to the size of the sensor
* pixel array. Align to multiples of 2 to ensure Bayer pattern isn't
* disrupted.
*/
rect.left = clamp(ALIGN(sel->r.left, 2), OV5693_NATIVE_START_LEFT,
OV5693_NATIVE_WIDTH);
rect.top = clamp(ALIGN(sel->r.top, 2), OV5693_NATIVE_START_TOP,
OV5693_NATIVE_HEIGHT);
rect.width = clamp_t(unsigned int, ALIGN(sel->r.width, 2),
OV5693_MIN_CROP_WIDTH, OV5693_NATIVE_WIDTH);
rect.height = clamp_t(unsigned int, ALIGN(sel->r.height, 2),
OV5693_MIN_CROP_HEIGHT, OV5693_NATIVE_HEIGHT);
/* Make sure the crop rectangle isn't outside the bounds of the array */
rect.width = min_t(unsigned int, rect.width,
OV5693_NATIVE_WIDTH - rect.left);
rect.height = min_t(unsigned int, rect.height,
OV5693_NATIVE_HEIGHT - rect.top);
__crop = __ov5693_get_pad_crop(ov5693, state, sel->pad, sel->which);
if (rect.width != __crop->width || rect.height != __crop->height) {
/*
* Reset the output image size if the crop rectangle size has
* been modified.
*/
format = __ov5693_get_pad_format(ov5693, state, sel->pad,
sel->which);
format->width = rect.width;
format->height = rect.height;
}
*__crop = rect;
sel->r = rect;
return 0;
}
static int ov5693_s_stream(struct v4l2_subdev *sd, int enable)
{
struct ov5693_device *ov5693 = to_ov5693_sensor(sd);
int ret;
if (enable) {
ret = pm_runtime_get_sync(ov5693->dev);
if (ret < 0)
goto err_power_down;
mutex_lock(&ov5693->lock);
ret = __v4l2_ctrl_handler_setup(&ov5693->ctrls.handler);
if (ret) {
mutex_unlock(&ov5693->lock);
goto err_power_down;
}
ret = ov5693_enable_streaming(ov5693, true);
mutex_unlock(&ov5693->lock);
} else {
mutex_lock(&ov5693->lock);
ret = ov5693_enable_streaming(ov5693, false);
mutex_unlock(&ov5693->lock);
}
if (ret)
goto err_power_down;
ov5693->streaming = !!enable;
if (!enable)
pm_runtime_put(ov5693->dev);
return 0;
err_power_down:
pm_runtime_put_noidle(ov5693->dev);
return ret;
}
static int ov5693_g_frame_interval(struct v4l2_subdev *sd,
struct v4l2_subdev_frame_interval *interval)
{
struct ov5693_device *ov5693 = to_ov5693_sensor(sd);
unsigned int framesize = OV5693_FIXED_PPL * (ov5693->mode.format.height +
ov5693->ctrls.vblank->val);
unsigned int fps = DIV_ROUND_CLOSEST(OV5693_PIXEL_RATE, framesize);
interval->interval.numerator = 1;
interval->interval.denominator = fps;
return 0;
}
static int ov5693_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
struct v4l2_subdev_mbus_code_enum *code)
{
/* Only a single mbus format is supported */
if (code->index > 0)
return -EINVAL;
code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
return 0;
}
static int ov5693_enum_frame_size(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
struct v4l2_subdev_frame_size_enum *fse)
{
struct ov5693_device *ov5693 = to_ov5693_sensor(sd);
struct v4l2_rect *__crop;
if (fse->index > 1 || fse->code != MEDIA_BUS_FMT_SBGGR10_1X10)
return -EINVAL;
__crop = __ov5693_get_pad_crop(ov5693, state, fse->pad, fse->which);
if (!__crop)
return -EINVAL;
fse->min_width = __crop->width / (fse->index + 1);
fse->min_height = __crop->height / (fse->index + 1);
fse->max_width = fse->min_width;
fse->max_height = fse->min_height;
return 0;
}
static const struct v4l2_subdev_video_ops ov5693_video_ops = {
.s_stream = ov5693_s_stream,
.g_frame_interval = ov5693_g_frame_interval,
};
static const struct v4l2_subdev_pad_ops ov5693_pad_ops = {
.enum_mbus_code = ov5693_enum_mbus_code,
.enum_frame_size = ov5693_enum_frame_size,
.get_fmt = ov5693_get_fmt,
.set_fmt = ov5693_set_fmt,
.get_selection = ov5693_get_selection,
.set_selection = ov5693_set_selection,
};
static const struct v4l2_subdev_ops ov5693_ops = {
.video = &ov5693_video_ops,
.pad = &ov5693_pad_ops,
};
/* Sensor and Driver Configuration Functions */
static int ov5693_init_controls(struct ov5693_device *ov5693)
{
const struct v4l2_ctrl_ops *ops = &ov5693_ctrl_ops;
struct ov5693_v4l2_ctrls *ctrls = &ov5693->ctrls;
struct v4l2_fwnode_device_properties props;
int vblank_max, vblank_def;
int exposure_max;
int hblank;
int ret;
ret = v4l2_ctrl_handler_init(&ctrls->handler, 12);
if (ret)
return ret;
/* link freq */
ctrls->link_freq = v4l2_ctrl_new_int_menu(&ctrls->handler,
NULL, V4L2_CID_LINK_FREQ,
0, 0, link_freq_menu_items);
if (ctrls->link_freq)
ctrls->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
/* pixel rate */
ctrls->pixel_rate = v4l2_ctrl_new_std(&ctrls->handler, NULL,
V4L2_CID_PIXEL_RATE, 0,
OV5693_PIXEL_RATE, 1,
OV5693_PIXEL_RATE);
/* Exposure */
exposure_max = ov5693->mode.vts - OV5693_INTEGRATION_TIME_MARGIN;
ctrls->exposure = v4l2_ctrl_new_std(&ctrls->handler, ops,
V4L2_CID_EXPOSURE,
OV5693_EXPOSURE_MIN, exposure_max,
OV5693_EXPOSURE_STEP, exposure_max);
/* Gain */
ctrls->analogue_gain = v4l2_ctrl_new_std(&ctrls->handler,
ops, V4L2_CID_ANALOGUE_GAIN,
OV5693_GAIN_MIN,
OV5693_GAIN_MAX,
OV5693_GAIN_STEP,
OV5693_GAIN_DEF);
ctrls->digital_gain = v4l2_ctrl_new_std(&ctrls->handler, ops,
V4L2_CID_DIGITAL_GAIN,
OV5693_DIGITAL_GAIN_MIN,
OV5693_DIGITAL_GAIN_MAX,
OV5693_DIGITAL_GAIN_STEP,
OV5693_DIGITAL_GAIN_DEF);
/* Flip */
ctrls->hflip = v4l2_ctrl_new_std(&ctrls->handler, ops,
V4L2_CID_HFLIP, 0, 1, 1, 0);
ctrls->vflip = v4l2_ctrl_new_std(&ctrls->handler, ops,
V4L2_CID_VFLIP, 0, 1, 1, 0);
hblank = OV5693_FIXED_PPL - ov5693->mode.format.width;
ctrls->hblank = v4l2_ctrl_new_std(&ctrls->handler, ops,
V4L2_CID_HBLANK, hblank,
hblank, 1, hblank);
if (ctrls->hblank)
ctrls->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
vblank_max = OV5693_TIMING_MAX_VTS - ov5693->mode.format.height;
vblank_def = ov5693->mode.vts - ov5693->mode.format.height;
ctrls->vblank = v4l2_ctrl_new_std(&ctrls->handler, ops,
V4L2_CID_VBLANK,
OV5693_TIMING_MIN_VTS,
vblank_max, 1, vblank_def);
ctrls->test_pattern = v4l2_ctrl_new_std_menu_items(
&ctrls->handler, ops,
V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(ov5693_test_pattern_menu) - 1,
0, 0, ov5693_test_pattern_menu);
if (ctrls->handler.error) {
dev_err(ov5693->dev, "Error initialising v4l2 ctrls\n");
ret = ctrls->handler.error;
goto err_free_handler;
}
/* set properties from fwnode (e.g. rotation, orientation) */
ret = v4l2_fwnode_device_parse(ov5693->dev, &props);
if (ret)
goto err_free_handler;
ret = v4l2_ctrl_new_fwnode_properties(&ctrls->handler, ops,
&props);
if (ret)
goto err_free_handler;
/* Use same lock for controls as for everything else. */
ctrls->handler.lock = &ov5693->lock;
ov5693->sd.ctrl_handler = &ctrls->handler;
return 0;
err_free_handler:
v4l2_ctrl_handler_free(&ctrls->handler);
return ret;
}
static int ov5693_configure_gpios(struct ov5693_device *ov5693)
{
ov5693->reset = devm_gpiod_get_optional(ov5693->dev, "reset",
GPIOD_OUT_HIGH);
if (IS_ERR(ov5693->reset)) {
dev_err(ov5693->dev, "Error fetching reset GPIO\n");
return PTR_ERR(ov5693->reset);
}
ov5693->powerdown = devm_gpiod_get_optional(ov5693->dev, "powerdown",
GPIOD_OUT_HIGH);
if (IS_ERR(ov5693->powerdown)) {
dev_err(ov5693->dev, "Error fetching powerdown GPIO\n");
return PTR_ERR(ov5693->powerdown);
}
return 0;
}
static int ov5693_get_regulators(struct ov5693_device *ov5693)
{
unsigned int i;
for (i = 0; i < OV5693_NUM_SUPPLIES; i++)
ov5693->supplies[i].supply = ov5693_supply_names[i];
return devm_regulator_bulk_get(ov5693->dev, OV5693_NUM_SUPPLIES,
ov5693->supplies);
}
static int ov5693_check_hwcfg(struct ov5693_device *ov5693)
{
struct fwnode_handle *fwnode = dev_fwnode(ov5693->dev);
struct v4l2_fwnode_endpoint bus_cfg = {
.bus_type = V4L2_MBUS_CSI2_DPHY,
};
struct fwnode_handle *endpoint;
unsigned int i;
int ret;
endpoint = fwnode_graph_get_next_endpoint(fwnode, NULL);
if (!endpoint)
return -EPROBE_DEFER; /* Could be provided by cio2-bridge */
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 != 2) {
dev_err(ov5693->dev, "only a 2-lane CSI2 config is supported");
ret = -EINVAL;
goto out_free_bus_cfg;
}
if (!bus_cfg.nr_of_link_frequencies) {
dev_err(ov5693->dev, "no link frequencies defined\n");
ret = -EINVAL;
goto out_free_bus_cfg;
}
for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++)
if (bus_cfg.link_frequencies[i] == OV5693_LINK_FREQ_419_2MHZ)
break;
if (i == bus_cfg.nr_of_link_frequencies) {
dev_err(ov5693->dev, "supported link freq %ull not found\n",
OV5693_LINK_FREQ_419_2MHZ);
ret = -EINVAL;
goto out_free_bus_cfg;
}
out_free_bus_cfg:
v4l2_fwnode_endpoint_free(&bus_cfg);
return ret;
}
static int ov5693_probe(struct i2c_client *client)
{
struct ov5693_device *ov5693;
u32 clk_rate;
int ret = 0;
ov5693 = devm_kzalloc(&client->dev, sizeof(*ov5693), GFP_KERNEL);
if (!ov5693)
return -ENOMEM;
ov5693->client = client;
ov5693->dev = &client->dev;
ret = ov5693_check_hwcfg(ov5693);
if (ret)
return ret;
mutex_init(&ov5693->lock);
v4l2_i2c_subdev_init(&ov5693->sd, client, &ov5693_ops);
ov5693->clk = devm_clk_get(&client->dev, "xvclk");
if (IS_ERR(ov5693->clk)) {
dev_err(&client->dev, "Error getting clock\n");
return PTR_ERR(ov5693->clk);
}
clk_rate = clk_get_rate(ov5693->clk);
if (clk_rate != OV5693_XVCLK_FREQ)
dev_warn(&client->dev, "Found clk freq %u, expected %u\n",
clk_rate, OV5693_XVCLK_FREQ);
ret = ov5693_configure_gpios(ov5693);
if (ret)
return ret;
ret = ov5693_get_regulators(ov5693);
if (ret)
return dev_err_probe(&client->dev, ret,
"Error fetching regulators\n");
ov5693->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
ov5693->pad.flags = MEDIA_PAD_FL_SOURCE;
ov5693->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
ov5693->mode.crop = ov5693_default_crop;
ov5693->mode.format = ov5693_default_fmt;
ov5693->mode.vts = __ov5693_calc_vts(ov5693->mode.format.height);
ret = ov5693_init_controls(ov5693);
if (ret)
return ret;
ret = media_entity_pads_init(&ov5693->sd.entity, 1, &ov5693->pad);
if (ret)
goto err_ctrl_handler_free;
/*
* We need the driver to work in the event that pm runtime is disable in
* the kernel, so power up and verify the chip now. In the event that
* runtime pm is disabled this will leave the chip on, so that streaming
* will work.
*/
ret = ov5693_sensor_powerup(ov5693);
if (ret)
goto err_media_entity_cleanup;
ret = ov5693_detect(ov5693);
if (ret)
goto err_powerdown;
pm_runtime_set_active(&client->dev);
pm_runtime_get_noresume(&client->dev);
pm_runtime_enable(&client->dev);
ret = v4l2_async_register_subdev_sensor(&ov5693->sd);
if (ret) {
dev_err(&client->dev, "failed to register V4L2 subdev: %d",
ret);
goto err_pm_runtime;
}
pm_runtime_set_autosuspend_delay(&client->dev, 1000);
pm_runtime_use_autosuspend(&client->dev);
pm_runtime_put_autosuspend(&client->dev);
return ret;
err_pm_runtime:
pm_runtime_disable(&client->dev);
pm_runtime_put_noidle(&client->dev);
err_powerdown:
ov5693_sensor_powerdown(ov5693);
err_media_entity_cleanup:
media_entity_cleanup(&ov5693->sd.entity);
err_ctrl_handler_free:
v4l2_ctrl_handler_free(&ov5693->ctrls.handler);
return ret;
}
static int ov5693_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ov5693_device *ov5693 = to_ov5693_sensor(sd);
v4l2_async_unregister_subdev(sd);
media_entity_cleanup(&ov5693->sd.entity);
v4l2_ctrl_handler_free(&ov5693->ctrls.handler);
mutex_destroy(&ov5693->lock);
/*
* Disable runtime PM. In case runtime PM is disabled in the kernel,
* make sure to turn power off manually.
*/
pm_runtime_disable(&client->dev);
if (!pm_runtime_status_suspended(&client->dev))
ov5693_sensor_powerdown(ov5693);
pm_runtime_set_suspended(&client->dev);
return 0;
}
static const struct dev_pm_ops ov5693_pm_ops = {
SET_RUNTIME_PM_OPS(ov5693_sensor_suspend, ov5693_sensor_resume, NULL)
};
static const struct acpi_device_id ov5693_acpi_match[] = {
{"INT33BE"},
{},
};
MODULE_DEVICE_TABLE(acpi, ov5693_acpi_match);
static struct i2c_driver ov5693_driver = {
.driver = {
.name = "ov5693",
.acpi_match_table = ov5693_acpi_match,
.pm = &ov5693_pm_ops,
},
.probe_new = ov5693_probe,
.remove = ov5693_remove,
};
module_i2c_driver(ov5693_driver);
MODULE_DESCRIPTION("A low-level driver for OmniVision 5693 sensors");
MODULE_LICENSE("GPL");
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