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linux/drivers/media/i2c/ov5645.c
Todor Tomov 4adb0a0432 media: ov5645: Supported external clock is 24MHz 
The external clock frequency was set to 23.88MHz by mistake
because of a platform which cannot get closer to 24MHz.
The supported by the driver external clock is 24MHz so
set it correctly and also fix the values of the pixel
clock and link clock.
However allow 1% tolerance to the external clock as this
difference is small enough to be insignificant.

Signed-off-by: Todor Tomov <todor.tomov@linaro.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-07-24 15:00:22 -04:00

1376 lines
31 KiB
C
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/*
* Driver for the OV5645 camera sensor.
*
* Copyright (c) 2011-2015, The Linux Foundation. All rights reserved.
* Copyright (C) 2015 By Tech Design S.L. All Rights Reserved.
* Copyright (C) 2012-2013 Freescale Semiconductor, Inc. All Rights Reserved.
*
* Based on:
* - the OV5645 driver from QC msm-3.10 kernel on codeaurora.org:
* https://us.codeaurora.org/cgit/quic/la/kernel/msm-3.10/tree/drivers/
* media/platform/msm/camera_v2/sensor/ov5645.c?h=LA.BR.1.2.4_rb1.41
* - the OV5640 driver posted on linux-media:
* https://www.mail-archive.com/linux-media%40vger.kernel.org/msg92671.html
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/bitops.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_graph.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-subdev.h>
#define OV5645_VOLTAGE_ANALOG 2800000
#define OV5645_VOLTAGE_DIGITAL_CORE 1500000
#define OV5645_VOLTAGE_DIGITAL_IO 1800000
#define OV5645_SYSTEM_CTRL0 0x3008
#define OV5645_SYSTEM_CTRL0_START 0x02
#define OV5645_SYSTEM_CTRL0_STOP 0x42
#define OV5645_CHIP_ID_HIGH 0x300a
#define OV5645_CHIP_ID_HIGH_BYTE 0x56
#define OV5645_CHIP_ID_LOW 0x300b
#define OV5645_CHIP_ID_LOW_BYTE 0x45
#define OV5645_AWB_MANUAL_CONTROL 0x3406
#define OV5645_AWB_MANUAL_ENABLE BIT(0)
#define OV5645_AEC_PK_MANUAL 0x3503
#define OV5645_AEC_MANUAL_ENABLE BIT(0)
#define OV5645_AGC_MANUAL_ENABLE BIT(1)
#define OV5645_TIMING_TC_REG20 0x3820
#define OV5645_SENSOR_VFLIP BIT(1)
#define OV5645_ISP_VFLIP BIT(2)
#define OV5645_TIMING_TC_REG21 0x3821
#define OV5645_SENSOR_MIRROR BIT(1)
#define OV5645_PRE_ISP_TEST_SETTING_1 0x503d
#define OV5645_TEST_PATTERN_MASK 0x3
#define OV5645_SET_TEST_PATTERN(x) ((x) & OV5645_TEST_PATTERN_MASK)
#define OV5645_TEST_PATTERN_ENABLE BIT(7)
#define OV5645_SDE_SAT_U 0x5583
#define OV5645_SDE_SAT_V 0x5584
struct reg_value {
u16 reg;
u8 val;
};
struct ov5645_mode_info {
u32 width;
u32 height;
const struct reg_value *data;
u32 data_size;
u32 pixel_clock;
u32 link_freq;
};
struct ov5645 {
struct i2c_client *i2c_client;
struct device *dev;
struct v4l2_subdev sd;
struct media_pad pad;
struct v4l2_fwnode_endpoint ep;
struct v4l2_mbus_framefmt fmt;
struct v4l2_rect crop;
struct clk *xclk;
struct regulator *io_regulator;
struct regulator *core_regulator;
struct regulator *analog_regulator;
const struct ov5645_mode_info *current_mode;
struct v4l2_ctrl_handler ctrls;
struct v4l2_ctrl *pixel_clock;
struct v4l2_ctrl *link_freq;
/* Cached register values */
u8 aec_pk_manual;
u8 timing_tc_reg20;
u8 timing_tc_reg21;
struct mutex power_lock; /* lock to protect power state */
int power_count;
struct gpio_desc *enable_gpio;
struct gpio_desc *rst_gpio;
};
static inline struct ov5645 *to_ov5645(struct v4l2_subdev *sd)
{
return container_of(sd, struct ov5645, sd);
}
static const struct reg_value ov5645_global_init_setting[] = {
{ 0x3103, 0x11 },
{ 0x3008, 0x82 },
{ 0x3008, 0x42 },
{ 0x3103, 0x03 },
{ 0x3503, 0x07 },
{ 0x3002, 0x1c },
{ 0x3006, 0xc3 },
{ 0x300e, 0x45 },
{ 0x3017, 0x00 },
{ 0x3018, 0x00 },
{ 0x302e, 0x0b },
{ 0x3037, 0x13 },
{ 0x3108, 0x01 },
{ 0x3611, 0x06 },
{ 0x3500, 0x00 },
{ 0x3501, 0x01 },
{ 0x3502, 0x00 },
{ 0x350a, 0x00 },
{ 0x350b, 0x3f },
{ 0x3620, 0x33 },
{ 0x3621, 0xe0 },
{ 0x3622, 0x01 },
{ 0x3630, 0x2e },
{ 0x3631, 0x00 },
{ 0x3632, 0x32 },
{ 0x3633, 0x52 },
{ 0x3634, 0x70 },
{ 0x3635, 0x13 },
{ 0x3636, 0x03 },
{ 0x3703, 0x5a },
{ 0x3704, 0xa0 },
{ 0x3705, 0x1a },
{ 0x3709, 0x12 },
{ 0x370b, 0x61 },
{ 0x370f, 0x10 },
{ 0x3715, 0x78 },
{ 0x3717, 0x01 },
{ 0x371b, 0x20 },
{ 0x3731, 0x12 },
{ 0x3901, 0x0a },
{ 0x3905, 0x02 },
{ 0x3906, 0x10 },
{ 0x3719, 0x86 },
{ 0x3810, 0x00 },
{ 0x3811, 0x10 },
{ 0x3812, 0x00 },
{ 0x3821, 0x01 },
{ 0x3824, 0x01 },
{ 0x3826, 0x03 },
{ 0x3828, 0x08 },
{ 0x3a19, 0xf8 },
{ 0x3c01, 0x34 },
{ 0x3c04, 0x28 },
{ 0x3c05, 0x98 },
{ 0x3c07, 0x07 },
{ 0x3c09, 0xc2 },
{ 0x3c0a, 0x9c },
{ 0x3c0b, 0x40 },
{ 0x3c01, 0x34 },
{ 0x4001, 0x02 },
{ 0x4514, 0x00 },
{ 0x4520, 0xb0 },
{ 0x460b, 0x37 },
{ 0x460c, 0x20 },
{ 0x4818, 0x01 },
{ 0x481d, 0xf0 },
{ 0x481f, 0x50 },
{ 0x4823, 0x70 },
{ 0x4831, 0x14 },
{ 0x5000, 0xa7 },
{ 0x5001, 0x83 },
{ 0x501d, 0x00 },
{ 0x501f, 0x00 },
{ 0x503d, 0x00 },
{ 0x505c, 0x30 },
{ 0x5181, 0x59 },
{ 0x5183, 0x00 },
{ 0x5191, 0xf0 },
{ 0x5192, 0x03 },
{ 0x5684, 0x10 },
{ 0x5685, 0xa0 },
{ 0x5686, 0x0c },
{ 0x5687, 0x78 },
{ 0x5a00, 0x08 },
{ 0x5a21, 0x00 },
{ 0x5a24, 0x00 },
{ 0x3008, 0x02 },
{ 0x3503, 0x00 },
{ 0x5180, 0xff },
{ 0x5181, 0xf2 },
{ 0x5182, 0x00 },
{ 0x5183, 0x14 },
{ 0x5184, 0x25 },
{ 0x5185, 0x24 },
{ 0x5186, 0x09 },
{ 0x5187, 0x09 },
{ 0x5188, 0x0a },
{ 0x5189, 0x75 },
{ 0x518a, 0x52 },
{ 0x518b, 0xea },
{ 0x518c, 0xa8 },
{ 0x518d, 0x42 },
{ 0x518e, 0x38 },
{ 0x518f, 0x56 },
{ 0x5190, 0x42 },
{ 0x5191, 0xf8 },
{ 0x5192, 0x04 },
{ 0x5193, 0x70 },
{ 0x5194, 0xf0 },
{ 0x5195, 0xf0 },
{ 0x5196, 0x03 },
{ 0x5197, 0x01 },
{ 0x5198, 0x04 },
{ 0x5199, 0x12 },
{ 0x519a, 0x04 },
{ 0x519b, 0x00 },
{ 0x519c, 0x06 },
{ 0x519d, 0x82 },
{ 0x519e, 0x38 },
{ 0x5381, 0x1e },
{ 0x5382, 0x5b },
{ 0x5383, 0x08 },
{ 0x5384, 0x0a },
{ 0x5385, 0x7e },
{ 0x5386, 0x88 },
{ 0x5387, 0x7c },
{ 0x5388, 0x6c },
{ 0x5389, 0x10 },
{ 0x538a, 0x01 },
{ 0x538b, 0x98 },
{ 0x5300, 0x08 },
{ 0x5301, 0x30 },
{ 0x5302, 0x10 },
{ 0x5303, 0x00 },
{ 0x5304, 0x08 },
{ 0x5305, 0x30 },
{ 0x5306, 0x08 },
{ 0x5307, 0x16 },
{ 0x5309, 0x08 },
{ 0x530a, 0x30 },
{ 0x530b, 0x04 },
{ 0x530c, 0x06 },
{ 0x5480, 0x01 },
{ 0x5481, 0x08 },
{ 0x5482, 0x14 },
{ 0x5483, 0x28 },
{ 0x5484, 0x51 },
{ 0x5485, 0x65 },
{ 0x5486, 0x71 },
{ 0x5487, 0x7d },
{ 0x5488, 0x87 },
{ 0x5489, 0x91 },
{ 0x548a, 0x9a },
{ 0x548b, 0xaa },
{ 0x548c, 0xb8 },
{ 0x548d, 0xcd },
{ 0x548e, 0xdd },
{ 0x548f, 0xea },
{ 0x5490, 0x1d },
{ 0x5580, 0x02 },
{ 0x5583, 0x40 },
{ 0x5584, 0x10 },
{ 0x5589, 0x10 },
{ 0x558a, 0x00 },
{ 0x558b, 0xf8 },
{ 0x5800, 0x3f },
{ 0x5801, 0x16 },
{ 0x5802, 0x0e },
{ 0x5803, 0x0d },
{ 0x5804, 0x17 },
{ 0x5805, 0x3f },
{ 0x5806, 0x0b },
{ 0x5807, 0x06 },
{ 0x5808, 0x04 },
{ 0x5809, 0x04 },
{ 0x580a, 0x06 },
{ 0x580b, 0x0b },
{ 0x580c, 0x09 },
{ 0x580d, 0x03 },
{ 0x580e, 0x00 },
{ 0x580f, 0x00 },
{ 0x5810, 0x03 },
{ 0x5811, 0x08 },
{ 0x5812, 0x0a },
{ 0x5813, 0x03 },
{ 0x5814, 0x00 },
{ 0x5815, 0x00 },
{ 0x5816, 0x04 },
{ 0x5817, 0x09 },
{ 0x5818, 0x0f },
{ 0x5819, 0x08 },
{ 0x581a, 0x06 },
{ 0x581b, 0x06 },
{ 0x581c, 0x08 },
{ 0x581d, 0x0c },
{ 0x581e, 0x3f },
{ 0x581f, 0x1e },
{ 0x5820, 0x12 },
{ 0x5821, 0x13 },
{ 0x5822, 0x21 },
{ 0x5823, 0x3f },
{ 0x5824, 0x68 },
{ 0x5825, 0x28 },
{ 0x5826, 0x2c },
{ 0x5827, 0x28 },
{ 0x5828, 0x08 },
{ 0x5829, 0x48 },
{ 0x582a, 0x64 },
{ 0x582b, 0x62 },
{ 0x582c, 0x64 },
{ 0x582d, 0x28 },
{ 0x582e, 0x46 },
{ 0x582f, 0x62 },
{ 0x5830, 0x60 },
{ 0x5831, 0x62 },
{ 0x5832, 0x26 },
{ 0x5833, 0x48 },
{ 0x5834, 0x66 },
{ 0x5835, 0x44 },
{ 0x5836, 0x64 },
{ 0x5837, 0x28 },
{ 0x5838, 0x66 },
{ 0x5839, 0x48 },
{ 0x583a, 0x2c },
{ 0x583b, 0x28 },
{ 0x583c, 0x26 },
{ 0x583d, 0xae },
{ 0x5025, 0x00 },
{ 0x3a0f, 0x30 },
{ 0x3a10, 0x28 },
{ 0x3a1b, 0x30 },
{ 0x3a1e, 0x26 },
{ 0x3a11, 0x60 },
{ 0x3a1f, 0x14 },
{ 0x0601, 0x02 },
{ 0x3008, 0x42 },
{ 0x3008, 0x02 }
};
static const struct reg_value ov5645_setting_sxga[] = {
{ 0x3612, 0xa9 },
{ 0x3614, 0x50 },
{ 0x3618, 0x00 },
{ 0x3034, 0x18 },
{ 0x3035, 0x21 },
{ 0x3036, 0x70 },
{ 0x3600, 0x09 },
{ 0x3601, 0x43 },
{ 0x3708, 0x66 },
{ 0x370c, 0xc3 },
{ 0x3800, 0x00 },
{ 0x3801, 0x00 },
{ 0x3802, 0x00 },
{ 0x3803, 0x06 },
{ 0x3804, 0x0a },
{ 0x3805, 0x3f },
{ 0x3806, 0x07 },
{ 0x3807, 0x9d },
{ 0x3808, 0x05 },
{ 0x3809, 0x00 },
{ 0x380a, 0x03 },
{ 0x380b, 0xc0 },
{ 0x380c, 0x07 },
{ 0x380d, 0x68 },
{ 0x380e, 0x03 },
{ 0x380f, 0xd8 },
{ 0x3813, 0x06 },
{ 0x3814, 0x31 },
{ 0x3815, 0x31 },
{ 0x3820, 0x47 },
{ 0x3a02, 0x03 },
{ 0x3a03, 0xd8 },
{ 0x3a08, 0x01 },
{ 0x3a09, 0xf8 },
{ 0x3a0a, 0x01 },
{ 0x3a0b, 0xa4 },
{ 0x3a0e, 0x02 },
{ 0x3a0d, 0x02 },
{ 0x3a14, 0x03 },
{ 0x3a15, 0xd8 },
{ 0x3a18, 0x00 },
{ 0x4004, 0x02 },
{ 0x4005, 0x18 },
{ 0x4300, 0x32 },
{ 0x4202, 0x00 }
};
static const struct reg_value ov5645_setting_1080p[] = {
{ 0x3612, 0xab },
{ 0x3614, 0x50 },
{ 0x3618, 0x04 },
{ 0x3034, 0x18 },
{ 0x3035, 0x11 },
{ 0x3036, 0x54 },
{ 0x3600, 0x08 },
{ 0x3601, 0x33 },
{ 0x3708, 0x63 },
{ 0x370c, 0xc0 },
{ 0x3800, 0x01 },
{ 0x3801, 0x50 },
{ 0x3802, 0x01 },
{ 0x3803, 0xb2 },
{ 0x3804, 0x08 },
{ 0x3805, 0xef },
{ 0x3806, 0x05 },
{ 0x3807, 0xf1 },
{ 0x3808, 0x07 },
{ 0x3809, 0x80 },
{ 0x380a, 0x04 },
{ 0x380b, 0x38 },
{ 0x380c, 0x09 },
{ 0x380d, 0xc4 },
{ 0x380e, 0x04 },
{ 0x380f, 0x60 },
{ 0x3813, 0x04 },
{ 0x3814, 0x11 },
{ 0x3815, 0x11 },
{ 0x3820, 0x47 },
{ 0x4514, 0x88 },
{ 0x3a02, 0x04 },
{ 0x3a03, 0x60 },
{ 0x3a08, 0x01 },
{ 0x3a09, 0x50 },
{ 0x3a0a, 0x01 },
{ 0x3a0b, 0x18 },
{ 0x3a0e, 0x03 },
{ 0x3a0d, 0x04 },
{ 0x3a14, 0x04 },
{ 0x3a15, 0x60 },
{ 0x3a18, 0x00 },
{ 0x4004, 0x06 },
{ 0x4005, 0x18 },
{ 0x4300, 0x32 },
{ 0x4202, 0x00 },
{ 0x4837, 0x0b }
};
static const struct reg_value ov5645_setting_full[] = {
{ 0x3612, 0xab },
{ 0x3614, 0x50 },
{ 0x3618, 0x04 },
{ 0x3034, 0x18 },
{ 0x3035, 0x11 },
{ 0x3036, 0x54 },
{ 0x3600, 0x08 },
{ 0x3601, 0x33 },
{ 0x3708, 0x63 },
{ 0x370c, 0xc0 },
{ 0x3800, 0x00 },
{ 0x3801, 0x00 },
{ 0x3802, 0x00 },
{ 0x3803, 0x00 },
{ 0x3804, 0x0a },
{ 0x3805, 0x3f },
{ 0x3806, 0x07 },
{ 0x3807, 0x9f },
{ 0x3808, 0x0a },
{ 0x3809, 0x20 },
{ 0x380a, 0x07 },
{ 0x380b, 0x98 },
{ 0x380c, 0x0b },
{ 0x380d, 0x1c },
{ 0x380e, 0x07 },
{ 0x380f, 0xb0 },
{ 0x3813, 0x06 },
{ 0x3814, 0x11 },
{ 0x3815, 0x11 },
{ 0x3820, 0x47 },
{ 0x4514, 0x88 },
{ 0x3a02, 0x07 },
{ 0x3a03, 0xb0 },
{ 0x3a08, 0x01 },
{ 0x3a09, 0x27 },
{ 0x3a0a, 0x00 },
{ 0x3a0b, 0xf6 },
{ 0x3a0e, 0x06 },
{ 0x3a0d, 0x08 },
{ 0x3a14, 0x07 },
{ 0x3a15, 0xb0 },
{ 0x3a18, 0x01 },
{ 0x4004, 0x06 },
{ 0x4005, 0x18 },
{ 0x4300, 0x32 },
{ 0x4837, 0x0b },
{ 0x4202, 0x00 }
};
static const s64 link_freq[] = {
224000000,
336000000
};
static const struct ov5645_mode_info ov5645_mode_info_data[] = {
{
.width = 1280,
.height = 960,
.data = ov5645_setting_sxga,
.data_size = ARRAY_SIZE(ov5645_setting_sxga),
.pixel_clock = 112000000,
.link_freq = 0 /* an index in link_freq[] */
},
{
.width = 1920,
.height = 1080,
.data = ov5645_setting_1080p,
.data_size = ARRAY_SIZE(ov5645_setting_1080p),
.pixel_clock = 168000000,
.link_freq = 1 /* an index in link_freq[] */
},
{
.width = 2592,
.height = 1944,
.data = ov5645_setting_full,
.data_size = ARRAY_SIZE(ov5645_setting_full),
.pixel_clock = 168000000,
.link_freq = 1 /* an index in link_freq[] */
},
};
static int ov5645_regulators_enable(struct ov5645 *ov5645)
{
int ret;
ret = regulator_enable(ov5645->io_regulator);
if (ret < 0) {
dev_err(ov5645->dev, "set io voltage failed\n");
return ret;
}
ret = regulator_enable(ov5645->analog_regulator);
if (ret) {
dev_err(ov5645->dev, "set analog voltage failed\n");
goto err_disable_io;
}
ret = regulator_enable(ov5645->core_regulator);
if (ret) {
dev_err(ov5645->dev, "set core voltage failed\n");
goto err_disable_analog;
}
return 0;
err_disable_analog:
regulator_disable(ov5645->analog_regulator);
err_disable_io:
regulator_disable(ov5645->io_regulator);
return ret;
}
static void ov5645_regulators_disable(struct ov5645 *ov5645)
{
int ret;
ret = regulator_disable(ov5645->core_regulator);
if (ret < 0)
dev_err(ov5645->dev, "core regulator disable failed\n");
ret = regulator_disable(ov5645->analog_regulator);
if (ret < 0)
dev_err(ov5645->dev, "analog regulator disable failed\n");
ret = regulator_disable(ov5645->io_regulator);
if (ret < 0)
dev_err(ov5645->dev, "io regulator disable failed\n");
}
static int ov5645_write_reg(struct ov5645 *ov5645, u16 reg, u8 val)
{
u8 regbuf[3];
int ret;
regbuf[0] = reg >> 8;
regbuf[1] = reg & 0xff;
regbuf[2] = val;
ret = i2c_master_send(ov5645->i2c_client, regbuf, 3);
if (ret < 0) {
dev_err(ov5645->dev, "%s: write reg error %d: reg=%x, val=%x\n",
__func__, ret, reg, val);
return ret;
}
return 0;
}
static int ov5645_read_reg(struct ov5645 *ov5645, u16 reg, u8 *val)
{
u8 regbuf[2];
int ret;
regbuf[0] = reg >> 8;
regbuf[1] = reg & 0xff;
ret = i2c_master_send(ov5645->i2c_client, regbuf, 2);
if (ret < 0) {
dev_err(ov5645->dev, "%s: write reg error %d: reg=%x\n",
__func__, ret, reg);
return ret;
}
ret = i2c_master_recv(ov5645->i2c_client, val, 1);
if (ret < 0) {
dev_err(ov5645->dev, "%s: read reg error %d: reg=%x\n",
__func__, ret, reg);
return ret;
}
return 0;
}
static int ov5645_set_aec_mode(struct ov5645 *ov5645, u32 mode)
{
u8 val = ov5645->aec_pk_manual;
int ret;
if (mode == V4L2_EXPOSURE_AUTO)
val &= ~OV5645_AEC_MANUAL_ENABLE;
else /* V4L2_EXPOSURE_MANUAL */
val |= OV5645_AEC_MANUAL_ENABLE;
ret = ov5645_write_reg(ov5645, OV5645_AEC_PK_MANUAL, val);
if (!ret)
ov5645->aec_pk_manual = val;
return ret;
}
static int ov5645_set_agc_mode(struct ov5645 *ov5645, u32 enable)
{
u8 val = ov5645->aec_pk_manual;
int ret;
if (enable)
val &= ~OV5645_AGC_MANUAL_ENABLE;
else
val |= OV5645_AGC_MANUAL_ENABLE;
ret = ov5645_write_reg(ov5645, OV5645_AEC_PK_MANUAL, val);
if (!ret)
ov5645->aec_pk_manual = val;
return ret;
}
static int ov5645_set_register_array(struct ov5645 *ov5645,
const struct reg_value *settings,
unsigned int num_settings)
{
unsigned int i;
int ret;
for (i = 0; i < num_settings; ++i, ++settings) {
ret = ov5645_write_reg(ov5645, settings->reg, settings->val);
if (ret < 0)
return ret;
}
return 0;
}
static int ov5645_set_power_on(struct ov5645 *ov5645)
{
int ret;
ret = ov5645_regulators_enable(ov5645);
if (ret < 0) {
return ret;
}
ret = clk_prepare_enable(ov5645->xclk);
if (ret < 0) {
dev_err(ov5645->dev, "clk prepare enable failed\n");
ov5645_regulators_disable(ov5645);
return ret;
}
usleep_range(5000, 15000);
gpiod_set_value_cansleep(ov5645->enable_gpio, 1);
usleep_range(1000, 2000);
gpiod_set_value_cansleep(ov5645->rst_gpio, 0);
msleep(20);
return 0;
}
static void ov5645_set_power_off(struct ov5645 *ov5645)
{
gpiod_set_value_cansleep(ov5645->rst_gpio, 1);
gpiod_set_value_cansleep(ov5645->enable_gpio, 0);
clk_disable_unprepare(ov5645->xclk);
ov5645_regulators_disable(ov5645);
}
static int ov5645_s_power(struct v4l2_subdev *sd, int on)
{
struct ov5645 *ov5645 = to_ov5645(sd);
int ret = 0;
mutex_lock(&ov5645->power_lock);
/* If the power count is modified from 0 to != 0 or from != 0 to 0,
* update the power state.
*/
if (ov5645->power_count == !on) {
if (on) {
ret = ov5645_set_power_on(ov5645);
if (ret < 0)
goto exit;
ret = ov5645_set_register_array(ov5645,
ov5645_global_init_setting,
ARRAY_SIZE(ov5645_global_init_setting));
if (ret < 0) {
dev_err(ov5645->dev,
"could not set init registers\n");
ov5645_set_power_off(ov5645);
goto exit;
}
ret = ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
OV5645_SYSTEM_CTRL0_STOP);
if (ret < 0) {
ov5645_set_power_off(ov5645);
goto exit;
}
} else {
ov5645_set_power_off(ov5645);
}
}
/* Update the power count. */
ov5645->power_count += on ? 1 : -1;
WARN_ON(ov5645->power_count < 0);
exit:
mutex_unlock(&ov5645->power_lock);
return ret;
}
static int ov5645_set_saturation(struct ov5645 *ov5645, s32 value)
{
u32 reg_value = (value * 0x10) + 0x40;
int ret;
ret = ov5645_write_reg(ov5645, OV5645_SDE_SAT_U, reg_value);
if (ret < 0)
return ret;
return ov5645_write_reg(ov5645, OV5645_SDE_SAT_V, reg_value);
}
static int ov5645_set_hflip(struct ov5645 *ov5645, s32 value)
{
u8 val = ov5645->timing_tc_reg21;
int ret;
if (value == 0)
val &= ~(OV5645_SENSOR_MIRROR);
else
val |= (OV5645_SENSOR_MIRROR);
ret = ov5645_write_reg(ov5645, OV5645_TIMING_TC_REG21, val);
if (!ret)
ov5645->timing_tc_reg21 = val;
return ret;
}
static int ov5645_set_vflip(struct ov5645 *ov5645, s32 value)
{
u8 val = ov5645->timing_tc_reg20;
int ret;
if (value == 0)
val |= (OV5645_SENSOR_VFLIP | OV5645_ISP_VFLIP);
else
val &= ~(OV5645_SENSOR_VFLIP | OV5645_ISP_VFLIP);
ret = ov5645_write_reg(ov5645, OV5645_TIMING_TC_REG20, val);
if (!ret)
ov5645->timing_tc_reg20 = val;
return ret;
}
static int ov5645_set_test_pattern(struct ov5645 *ov5645, s32 value)
{
u8 val = 0;
if (value) {
val = OV5645_SET_TEST_PATTERN(value - 1);
val |= OV5645_TEST_PATTERN_ENABLE;
}
return ov5645_write_reg(ov5645, OV5645_PRE_ISP_TEST_SETTING_1, val);
}
static const char * const ov5645_test_pattern_menu[] = {
"Disabled",
"Vertical Color Bars",
"Pseudo-Random Data",
"Color Square",
"Black Image",
};
static int ov5645_set_awb(struct ov5645 *ov5645, s32 enable_auto)
{
u8 val = 0;
if (!enable_auto)
val = OV5645_AWB_MANUAL_ENABLE;
return ov5645_write_reg(ov5645, OV5645_AWB_MANUAL_CONTROL, val);
}
static int ov5645_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov5645 *ov5645 = container_of(ctrl->handler,
struct ov5645, ctrls);
int ret;
mutex_lock(&ov5645->power_lock);
if (!ov5645->power_count) {
mutex_unlock(&ov5645->power_lock);
return 0;
}
switch (ctrl->id) {
case V4L2_CID_SATURATION:
ret = ov5645_set_saturation(ov5645, ctrl->val);
break;
case V4L2_CID_AUTO_WHITE_BALANCE:
ret = ov5645_set_awb(ov5645, ctrl->val);
break;
case V4L2_CID_AUTOGAIN:
ret = ov5645_set_agc_mode(ov5645, ctrl->val);
break;
case V4L2_CID_EXPOSURE_AUTO:
ret = ov5645_set_aec_mode(ov5645, ctrl->val);
break;
case V4L2_CID_TEST_PATTERN:
ret = ov5645_set_test_pattern(ov5645, ctrl->val);
break;
case V4L2_CID_HFLIP:
ret = ov5645_set_hflip(ov5645, ctrl->val);
break;
case V4L2_CID_VFLIP:
ret = ov5645_set_vflip(ov5645, ctrl->val);
break;
default:
ret = -EINVAL;
break;
}
mutex_unlock(&ov5645->power_lock);
return ret;
}
static struct v4l2_ctrl_ops ov5645_ctrl_ops = {
.s_ctrl = ov5645_s_ctrl,
};
static int ov5645_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_UYVY8_2X8;
return 0;
}
static int ov5645_enum_frame_size(struct v4l2_subdev *subdev,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_frame_size_enum *fse)
{
if (fse->code != MEDIA_BUS_FMT_UYVY8_2X8)
return -EINVAL;
if (fse->index >= ARRAY_SIZE(ov5645_mode_info_data))
return -EINVAL;
fse->min_width = ov5645_mode_info_data[fse->index].width;
fse->max_width = ov5645_mode_info_data[fse->index].width;
fse->min_height = ov5645_mode_info_data[fse->index].height;
fse->max_height = ov5645_mode_info_data[fse->index].height;
return 0;
}
static struct v4l2_mbus_framefmt *
__ov5645_get_pad_format(struct ov5645 *ov5645,
struct v4l2_subdev_pad_config *cfg,
unsigned int pad,
enum v4l2_subdev_format_whence which)
{
switch (which) {
case V4L2_SUBDEV_FORMAT_TRY:
return v4l2_subdev_get_try_format(&ov5645->sd, cfg, pad);
case V4L2_SUBDEV_FORMAT_ACTIVE:
return &ov5645->fmt;
default:
return NULL;
}
}
static int ov5645_get_format(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *format)
{
struct ov5645 *ov5645 = to_ov5645(sd);
format->format = *__ov5645_get_pad_format(ov5645, cfg, format->pad,
format->which);
return 0;
}
static struct v4l2_rect *
__ov5645_get_pad_crop(struct ov5645 *ov5645, struct v4l2_subdev_pad_config *cfg,
unsigned int pad, enum v4l2_subdev_format_whence which)
{
switch (which) {
case V4L2_SUBDEV_FORMAT_TRY:
return v4l2_subdev_get_try_crop(&ov5645->sd, cfg, pad);
case V4L2_SUBDEV_FORMAT_ACTIVE:
return &ov5645->crop;
default:
return NULL;
}
}
static int ov5645_set_format(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *format)
{
struct ov5645 *ov5645 = to_ov5645(sd);
struct v4l2_mbus_framefmt *__format;
struct v4l2_rect *__crop;
const struct ov5645_mode_info *new_mode;
int ret;
__crop = __ov5645_get_pad_crop(ov5645, cfg, format->pad,
format->which);
new_mode = v4l2_find_nearest_size(ov5645_mode_info_data,
ARRAY_SIZE(ov5645_mode_info_data),
width, height,
format->format.width, format->format.height);
__crop->width = new_mode->width;
__crop->height = new_mode->height;
if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
ret = v4l2_ctrl_s_ctrl_int64(ov5645->pixel_clock,
new_mode->pixel_clock);
if (ret < 0)
return ret;
ret = v4l2_ctrl_s_ctrl(ov5645->link_freq,
new_mode->link_freq);
if (ret < 0)
return ret;
ov5645->current_mode = new_mode;
}
__format = __ov5645_get_pad_format(ov5645, cfg, format->pad,
format->which);
__format->width = __crop->width;
__format->height = __crop->height;
__format->code = MEDIA_BUS_FMT_UYVY8_2X8;
__format->field = V4L2_FIELD_NONE;
__format->colorspace = V4L2_COLORSPACE_SRGB;
format->format = *__format;
return 0;
}
static int ov5645_entity_init_cfg(struct v4l2_subdev *subdev,
struct v4l2_subdev_pad_config *cfg)
{
struct v4l2_subdev_format fmt = { 0 };
fmt.which = cfg ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
fmt.format.width = 1920;
fmt.format.height = 1080;
ov5645_set_format(subdev, cfg, &fmt);
return 0;
}
static int ov5645_get_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_selection *sel)
{
struct ov5645 *ov5645 = to_ov5645(sd);
if (sel->target != V4L2_SEL_TGT_CROP)
return -EINVAL;
sel->r = *__ov5645_get_pad_crop(ov5645, cfg, sel->pad,
sel->which);
return 0;
}
static int ov5645_s_stream(struct v4l2_subdev *subdev, int enable)
{
struct ov5645 *ov5645 = to_ov5645(subdev);
int ret;
if (enable) {
ret = ov5645_set_register_array(ov5645,
ov5645->current_mode->data,
ov5645->current_mode->data_size);
if (ret < 0) {
dev_err(ov5645->dev, "could not set mode %dx%d\n",
ov5645->current_mode->width,
ov5645->current_mode->height);
return ret;
}
ret = v4l2_ctrl_handler_setup(&ov5645->ctrls);
if (ret < 0) {
dev_err(ov5645->dev, "could not sync v4l2 controls\n");
return ret;
}
ret = ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
OV5645_SYSTEM_CTRL0_START);
if (ret < 0)
return ret;
} else {
ret = ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
OV5645_SYSTEM_CTRL0_STOP);
if (ret < 0)
return ret;
}
return 0;
}
static const struct v4l2_subdev_core_ops ov5645_core_ops = {
.s_power = ov5645_s_power,
};
static const struct v4l2_subdev_video_ops ov5645_video_ops = {
.s_stream = ov5645_s_stream,
};
static const struct v4l2_subdev_pad_ops ov5645_subdev_pad_ops = {
.init_cfg = ov5645_entity_init_cfg,
.enum_mbus_code = ov5645_enum_mbus_code,
.enum_frame_size = ov5645_enum_frame_size,
.get_fmt = ov5645_get_format,
.set_fmt = ov5645_set_format,
.get_selection = ov5645_get_selection,
};
static const struct v4l2_subdev_ops ov5645_subdev_ops = {
.core = &ov5645_core_ops,
.video = &ov5645_video_ops,
.pad = &ov5645_subdev_pad_ops,
};
static int ov5645_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct device_node *endpoint;
struct ov5645 *ov5645;
u8 chip_id_high, chip_id_low;
u32 xclk_freq;
int ret;
ov5645 = devm_kzalloc(dev, sizeof(struct ov5645), GFP_KERNEL);
if (!ov5645)
return -ENOMEM;
ov5645->i2c_client = client;
ov5645->dev = dev;
endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
if (!endpoint) {
dev_err(dev, "endpoint node not found\n");
return -EINVAL;
}
ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(endpoint),
&ov5645->ep);
of_node_put(endpoint);
if (ret < 0) {
dev_err(dev, "parsing endpoint node failed\n");
return ret;
}
if (ov5645->ep.bus_type != V4L2_MBUS_CSI2) {
dev_err(dev, "invalid bus type, must be CSI2\n");
return -EINVAL;
}
/* get system clock (xclk) */
ov5645->xclk = devm_clk_get(dev, "xclk");
if (IS_ERR(ov5645->xclk)) {
dev_err(dev, "could not get xclk");
return PTR_ERR(ov5645->xclk);
}
ret = of_property_read_u32(dev->of_node, "clock-frequency", &xclk_freq);
if (ret) {
dev_err(dev, "could not get xclk frequency\n");
return ret;
}
/* external clock must be 24MHz, allow 1% tolerance */
if (xclk_freq < 23760000 || xclk_freq > 24240000) {
dev_err(dev, "external clock frequency %u is not supported\n",
xclk_freq);
return -EINVAL;
}
ret = clk_set_rate(ov5645->xclk, xclk_freq);
if (ret) {
dev_err(dev, "could not set xclk frequency\n");
return ret;
}
ov5645->io_regulator = devm_regulator_get(dev, "vdddo");
if (IS_ERR(ov5645->io_regulator)) {
dev_err(dev, "cannot get io regulator\n");
return PTR_ERR(ov5645->io_regulator);
}
ret = regulator_set_voltage(ov5645->io_regulator,
OV5645_VOLTAGE_DIGITAL_IO,
OV5645_VOLTAGE_DIGITAL_IO);
if (ret < 0) {
dev_err(dev, "cannot set io voltage\n");
return ret;
}
ov5645->core_regulator = devm_regulator_get(dev, "vddd");
if (IS_ERR(ov5645->core_regulator)) {
dev_err(dev, "cannot get core regulator\n");
return PTR_ERR(ov5645->core_regulator);
}
ret = regulator_set_voltage(ov5645->core_regulator,
OV5645_VOLTAGE_DIGITAL_CORE,
OV5645_VOLTAGE_DIGITAL_CORE);
if (ret < 0) {
dev_err(dev, "cannot set core voltage\n");
return ret;
}
ov5645->analog_regulator = devm_regulator_get(dev, "vdda");
if (IS_ERR(ov5645->analog_regulator)) {
dev_err(dev, "cannot get analog regulator\n");
return PTR_ERR(ov5645->analog_regulator);
}
ret = regulator_set_voltage(ov5645->analog_regulator,
OV5645_VOLTAGE_ANALOG,
OV5645_VOLTAGE_ANALOG);
if (ret < 0) {
dev_err(dev, "cannot set analog voltage\n");
return ret;
}
ov5645->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_HIGH);
if (IS_ERR(ov5645->enable_gpio)) {
dev_err(dev, "cannot get enable gpio\n");
return PTR_ERR(ov5645->enable_gpio);
}
ov5645->rst_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(ov5645->rst_gpio)) {
dev_err(dev, "cannot get reset gpio\n");
return PTR_ERR(ov5645->rst_gpio);
}
mutex_init(&ov5645->power_lock);
v4l2_ctrl_handler_init(&ov5645->ctrls, 9);
v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
V4L2_CID_SATURATION, -4, 4, 1, 0);
v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
V4L2_CID_HFLIP, 0, 1, 1, 0);
v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
V4L2_CID_VFLIP, 0, 1, 1, 0);
v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
v4l2_ctrl_new_std_menu(&ov5645->ctrls, &ov5645_ctrl_ops,
V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL,
0, V4L2_EXPOSURE_AUTO);
v4l2_ctrl_new_std_menu_items(&ov5645->ctrls, &ov5645_ctrl_ops,
V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(ov5645_test_pattern_menu) - 1,
0, 0, ov5645_test_pattern_menu);
ov5645->pixel_clock = v4l2_ctrl_new_std(&ov5645->ctrls,
&ov5645_ctrl_ops,
V4L2_CID_PIXEL_RATE,
1, INT_MAX, 1, 1);
ov5645->link_freq = v4l2_ctrl_new_int_menu(&ov5645->ctrls,
&ov5645_ctrl_ops,
V4L2_CID_LINK_FREQ,
ARRAY_SIZE(link_freq) - 1,
0, link_freq);
if (ov5645->link_freq)
ov5645->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
ov5645->sd.ctrl_handler = &ov5645->ctrls;
if (ov5645->ctrls.error) {
dev_err(dev, "%s: control initialization error %d\n",
__func__, ov5645->ctrls.error);
ret = ov5645->ctrls.error;
goto free_ctrl;
}
v4l2_i2c_subdev_init(&ov5645->sd, client, &ov5645_subdev_ops);
ov5645->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
ov5645->pad.flags = MEDIA_PAD_FL_SOURCE;
ov5645->sd.dev = &client->dev;
ov5645->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
ret = media_entity_pads_init(&ov5645->sd.entity, 1, &ov5645->pad);
if (ret < 0) {
dev_err(dev, "could not register media entity\n");
goto free_ctrl;
}
ret = ov5645_s_power(&ov5645->sd, true);
if (ret < 0) {
dev_err(dev, "could not power up OV5645\n");
goto free_entity;
}
ret = ov5645_read_reg(ov5645, OV5645_CHIP_ID_HIGH, &chip_id_high);
if (ret < 0 || chip_id_high != OV5645_CHIP_ID_HIGH_BYTE) {
dev_err(dev, "could not read ID high\n");
ret = -ENODEV;
goto power_down;
}
ret = ov5645_read_reg(ov5645, OV5645_CHIP_ID_LOW, &chip_id_low);
if (ret < 0 || chip_id_low != OV5645_CHIP_ID_LOW_BYTE) {
dev_err(dev, "could not read ID low\n");
ret = -ENODEV;
goto power_down;
}
dev_info(dev, "OV5645 detected at address 0x%02x\n", client->addr);
ret = ov5645_read_reg(ov5645, OV5645_AEC_PK_MANUAL,
&ov5645->aec_pk_manual);
if (ret < 0) {
dev_err(dev, "could not read AEC/AGC mode\n");
ret = -ENODEV;
goto power_down;
}
ret = ov5645_read_reg(ov5645, OV5645_TIMING_TC_REG20,
&ov5645->timing_tc_reg20);
if (ret < 0) {
dev_err(dev, "could not read vflip value\n");
ret = -ENODEV;
goto power_down;
}
ret = ov5645_read_reg(ov5645, OV5645_TIMING_TC_REG21,
&ov5645->timing_tc_reg21);
if (ret < 0) {
dev_err(dev, "could not read hflip value\n");
ret = -ENODEV;
goto power_down;
}
ov5645_s_power(&ov5645->sd, false);
ret = v4l2_async_register_subdev(&ov5645->sd);
if (ret < 0) {
dev_err(dev, "could not register v4l2 device\n");
goto free_entity;
}
ov5645_entity_init_cfg(&ov5645->sd, NULL);
return 0;
power_down:
ov5645_s_power(&ov5645->sd, false);
free_entity:
media_entity_cleanup(&ov5645->sd.entity);
free_ctrl:
v4l2_ctrl_handler_free(&ov5645->ctrls);
mutex_destroy(&ov5645->power_lock);
return ret;
}
static int ov5645_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ov5645 *ov5645 = to_ov5645(sd);
v4l2_async_unregister_subdev(&ov5645->sd);
media_entity_cleanup(&ov5645->sd.entity);
v4l2_ctrl_handler_free(&ov5645->ctrls);
mutex_destroy(&ov5645->power_lock);
return 0;
}
static const struct i2c_device_id ov5645_id[] = {
{ "ov5645", 0 },
{}
};
MODULE_DEVICE_TABLE(i2c, ov5645_id);
static const struct of_device_id ov5645_of_match[] = {
{ .compatible = "ovti,ov5645" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, ov5645_of_match);
static struct i2c_driver ov5645_i2c_driver = {
.driver = {
.of_match_table = of_match_ptr(ov5645_of_match),
.name = "ov5645",
},
.probe = ov5645_probe,
.remove = ov5645_remove,
.id_table = ov5645_id,
};
module_i2c_driver(ov5645_i2c_driver);
MODULE_DESCRIPTION("Omnivision OV5645 Camera Driver");
MODULE_AUTHOR("Todor Tomov <todor.tomov@linaro.org>");
MODULE_LICENSE("GPL v2");
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