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linux/drivers/media/i2c/ov5693.c
Hans de Goede 2fa8d1d768 media: ov5693: Add support for a privacy-led GPIO 
Add support for a privacy-led GPIO.

Making the privacy LED to controlable from userspace, as using the LED
class subsystem would do, would make it too easy for spy-ware to disable
the LED.

To avoid this have the sensor driver directly control the LED.

Link: https://lore.kernel.org/linux-media/20221129231149.697154-2-hdegoede@redhat.com

Reviewed-by: Andy Shevchenko <andy@kernel.org>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2022-12-06 07:10:07 +00:00

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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
#define to_ov5693_sensor(x) container_of(x, struct ov5693_device, sd)
static const char * const ov5693_supply_names[] = {
"avdd", /* Analog power */
"dovdd", /* Digital I/O power */
"dvdd", /* Digital circuit power */
};
#define OV5693_NUM_SUPPLIES ARRAY_SIZE(ov5693_supply_names)
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 gpio_desc *privacy_led;
struct regulator_bulk_data supplies[OV5693_NUM_SUPPLIES];
struct clk *xvclk;
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_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->privacy_led, 0);
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->xvclk);
}
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->xvclk);
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);
gpiod_set_value_cansleep(ov5693->privacy_led, 1);
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;
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 0;
mutex_lock(&ov5693->lock);
ov5693->mode.binning_x = hratio > 1;
ov5693->mode.inc_x_odd = hratio > 1 ? 3 : 1;
ov5693->mode.binning_y = vratio > 1;
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 0;
}
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);
}
ov5693->privacy_led = devm_gpiod_get_optional(ov5693->dev, "privacy-led",
GPIOD_OUT_LOW);
if (IS_ERR(ov5693->privacy_led)) {
dev_err(ov5693->dev, "Error fetching privacy-led GPIO\n");
return PTR_ERR(ov5693->privacy_led);
}
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 xvclk_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->xvclk = devm_clk_get_optional(&client->dev, "xvclk");
if (IS_ERR(ov5693->xvclk))
return dev_err_probe(&client->dev, PTR_ERR(ov5693->xvclk),
"failed to get xvclk: %ld\n",
PTR_ERR(ov5693->xvclk));
if (ov5693->xvclk) {
xvclk_rate = clk_get_rate(ov5693->xvclk);
} else {
ret = fwnode_property_read_u32(dev_fwnode(&client->dev),
"clock-frequency",
&xvclk_rate);
if (ret) {
dev_err(&client->dev, "can't get clock frequency");
return ret;
}
}
if (xvclk_rate != OV5693_XVCLK_FREQ)
dev_warn(&client->dev, "Found clk freq %u, expected %u\n",
xvclk_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 void 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);
}
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 const struct of_device_id ov5693_of_match[] = {
{ .compatible = "ovti,ov5693", },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, ov5693_of_match);
static struct i2c_driver ov5693_driver = {
.driver = {
.name = "ov5693",
.acpi_match_table = ov5693_acpi_match,
.of_match_table = ov5693_of_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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