1169 lines
26 KiB
C
1169 lines
26 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Omnivision OV2680 CMOS Image Sensor driver
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*
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* Copyright (C) 2018 Linaro Ltd
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*
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* Based on OV5640 Sensor Driver
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* Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
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* Copyright (C) 2014-2017 Mentor Graphics Inc.
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*
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*/
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#include <asm/unaligned.h>
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/gpio/consumer.h>
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#include <linux/regulator/consumer.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-subdev.h>
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#define OV2680_XVCLK_VALUE 24000000
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#define OV2680_CHIP_ID 0x2680
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#define OV2680_REG_STREAM_CTRL 0x0100
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#define OV2680_REG_SOFT_RESET 0x0103
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#define OV2680_REG_CHIP_ID_HIGH 0x300a
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#define OV2680_REG_CHIP_ID_LOW 0x300b
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#define OV2680_REG_R_MANUAL 0x3503
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#define OV2680_REG_GAIN_PK 0x350a
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#define OV2680_REG_EXPOSURE_PK_HIGH 0x3500
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#define OV2680_REG_TIMING_HTS 0x380c
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#define OV2680_REG_TIMING_VTS 0x380e
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#define OV2680_REG_FORMAT1 0x3820
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#define OV2680_REG_FORMAT2 0x3821
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#define OV2680_REG_ISP_CTRL00 0x5080
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#define OV2680_FRAME_RATE 30
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#define OV2680_REG_VALUE_8BIT 1
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#define OV2680_REG_VALUE_16BIT 2
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#define OV2680_REG_VALUE_24BIT 3
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#define OV2680_WIDTH_MAX 1600
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#define OV2680_HEIGHT_MAX 1200
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enum ov2680_mode_id {
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OV2680_MODE_QUXGA_800_600,
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OV2680_MODE_720P_1280_720,
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OV2680_MODE_UXGA_1600_1200,
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OV2680_MODE_MAX,
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};
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struct reg_value {
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u16 reg_addr;
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u8 val;
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};
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static const char * const ov2680_supply_name[] = {
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"DOVDD",
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"DVDD",
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"AVDD",
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};
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#define OV2680_NUM_SUPPLIES ARRAY_SIZE(ov2680_supply_name)
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struct ov2680_mode_info {
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const char *name;
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enum ov2680_mode_id id;
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u32 width;
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u32 height;
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const struct reg_value *reg_data;
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u32 reg_data_size;
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};
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struct ov2680_ctrls {
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struct v4l2_ctrl_handler handler;
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struct {
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struct v4l2_ctrl *auto_exp;
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struct v4l2_ctrl *exposure;
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};
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struct {
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struct v4l2_ctrl *auto_gain;
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struct v4l2_ctrl *gain;
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};
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struct v4l2_ctrl *hflip;
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struct v4l2_ctrl *vflip;
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struct v4l2_ctrl *test_pattern;
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};
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struct ov2680_dev {
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struct i2c_client *i2c_client;
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struct v4l2_subdev sd;
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struct media_pad pad;
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struct clk *xvclk;
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u32 xvclk_freq;
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struct regulator_bulk_data supplies[OV2680_NUM_SUPPLIES];
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struct gpio_desc *reset_gpio;
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struct mutex lock; /* protect members */
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bool mode_pending_changes;
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bool is_enabled;
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bool is_streaming;
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struct ov2680_ctrls ctrls;
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struct v4l2_mbus_framefmt fmt;
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struct v4l2_fract frame_interval;
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const struct ov2680_mode_info *current_mode;
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};
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static const char * const test_pattern_menu[] = {
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"Disabled",
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"Color Bars",
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"Random Data",
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"Square",
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"Black Image",
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};
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static const int ov2680_hv_flip_bayer_order[] = {
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MEDIA_BUS_FMT_SBGGR10_1X10,
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MEDIA_BUS_FMT_SGRBG10_1X10,
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MEDIA_BUS_FMT_SGBRG10_1X10,
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MEDIA_BUS_FMT_SRGGB10_1X10,
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};
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static const struct reg_value ov2680_setting_30fps_QUXGA_800_600[] = {
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{0x3086, 0x01}, {0x370a, 0x23}, {0x3808, 0x03}, {0x3809, 0x20},
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{0x380a, 0x02}, {0x380b, 0x58}, {0x380c, 0x06}, {0x380d, 0xac},
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{0x380e, 0x02}, {0x380f, 0x84}, {0x3811, 0x04}, {0x3813, 0x04},
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{0x3814, 0x31}, {0x3815, 0x31}, {0x3820, 0xc0}, {0x4008, 0x00},
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{0x4009, 0x03}, {0x4837, 0x1e}, {0x3501, 0x4e}, {0x3502, 0xe0},
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};
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static const struct reg_value ov2680_setting_30fps_720P_1280_720[] = {
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{0x3086, 0x00}, {0x3808, 0x05}, {0x3809, 0x00}, {0x380a, 0x02},
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{0x380b, 0xd0}, {0x380c, 0x06}, {0x380d, 0xa8}, {0x380e, 0x05},
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{0x380f, 0x0e}, {0x3811, 0x08}, {0x3813, 0x06}, {0x3814, 0x11},
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{0x3815, 0x11}, {0x3820, 0xc0}, {0x4008, 0x00},
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};
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static const struct reg_value ov2680_setting_30fps_UXGA_1600_1200[] = {
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{0x3086, 0x00}, {0x3501, 0x4e}, {0x3502, 0xe0}, {0x3808, 0x06},
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{0x3809, 0x40}, {0x380a, 0x04}, {0x380b, 0xb0}, {0x380c, 0x06},
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{0x380d, 0xa8}, {0x380e, 0x05}, {0x380f, 0x0e}, {0x3811, 0x00},
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{0x3813, 0x00}, {0x3814, 0x11}, {0x3815, 0x11}, {0x3820, 0xc0},
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{0x4008, 0x00}, {0x4837, 0x18}
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};
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static const struct ov2680_mode_info ov2680_mode_init_data = {
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"mode_quxga_800_600", OV2680_MODE_QUXGA_800_600, 800, 600,
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ov2680_setting_30fps_QUXGA_800_600,
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ARRAY_SIZE(ov2680_setting_30fps_QUXGA_800_600),
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};
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static const struct ov2680_mode_info ov2680_mode_data[OV2680_MODE_MAX] = {
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{"mode_quxga_800_600", OV2680_MODE_QUXGA_800_600,
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800, 600, ov2680_setting_30fps_QUXGA_800_600,
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ARRAY_SIZE(ov2680_setting_30fps_QUXGA_800_600)},
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{"mode_720p_1280_720", OV2680_MODE_720P_1280_720,
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1280, 720, ov2680_setting_30fps_720P_1280_720,
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ARRAY_SIZE(ov2680_setting_30fps_720P_1280_720)},
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{"mode_uxga_1600_1200", OV2680_MODE_UXGA_1600_1200,
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1600, 1200, ov2680_setting_30fps_UXGA_1600_1200,
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ARRAY_SIZE(ov2680_setting_30fps_UXGA_1600_1200)},
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};
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static struct ov2680_dev *to_ov2680_dev(struct v4l2_subdev *sd)
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{
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return container_of(sd, struct ov2680_dev, sd);
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}
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static struct device *ov2680_to_dev(struct ov2680_dev *sensor)
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{
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return &sensor->i2c_client->dev;
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}
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static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
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{
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return &container_of(ctrl->handler, struct ov2680_dev,
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ctrls.handler)->sd;
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}
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static int __ov2680_write_reg(struct ov2680_dev *sensor, u16 reg,
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unsigned int len, u32 val)
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{
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struct i2c_client *client = sensor->i2c_client;
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u8 buf[6];
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int ret;
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if (len > 4)
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return -EINVAL;
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put_unaligned_be16(reg, buf);
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put_unaligned_be32(val << (8 * (4 - len)), buf + 2);
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ret = i2c_master_send(client, buf, len + 2);
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if (ret != len + 2) {
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dev_err(&client->dev, "write error: reg=0x%4x: %d\n", reg, ret);
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return -EIO;
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}
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return 0;
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}
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#define ov2680_write_reg(s, r, v) \
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__ov2680_write_reg(s, r, OV2680_REG_VALUE_8BIT, v)
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#define ov2680_write_reg16(s, r, v) \
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__ov2680_write_reg(s, r, OV2680_REG_VALUE_16BIT, v)
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#define ov2680_write_reg24(s, r, v) \
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__ov2680_write_reg(s, r, OV2680_REG_VALUE_24BIT, v)
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static int __ov2680_read_reg(struct ov2680_dev *sensor, u16 reg,
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unsigned int len, u32 *val)
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{
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struct i2c_client *client = sensor->i2c_client;
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struct i2c_msg msgs[2];
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u8 addr_buf[2] = { reg >> 8, reg & 0xff };
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u8 data_buf[4] = { 0, };
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int ret;
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if (len > 4)
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return -EINVAL;
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msgs[0].addr = client->addr;
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msgs[0].flags = 0;
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msgs[0].len = ARRAY_SIZE(addr_buf);
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msgs[0].buf = addr_buf;
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msgs[1].addr = client->addr;
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msgs[1].flags = I2C_M_RD;
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msgs[1].len = len;
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msgs[1].buf = &data_buf[4 - len];
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ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
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if (ret != ARRAY_SIZE(msgs)) {
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dev_err(&client->dev, "read error: reg=0x%4x: %d\n", reg, ret);
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return -EIO;
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}
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*val = get_unaligned_be32(data_buf);
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return 0;
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}
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#define ov2680_read_reg(s, r, v) \
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__ov2680_read_reg(s, r, OV2680_REG_VALUE_8BIT, v)
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#define ov2680_read_reg16(s, r, v) \
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__ov2680_read_reg(s, r, OV2680_REG_VALUE_16BIT, v)
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#define ov2680_read_reg24(s, r, v) \
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__ov2680_read_reg(s, r, OV2680_REG_VALUE_24BIT, v)
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static int ov2680_mod_reg(struct ov2680_dev *sensor, u16 reg, u8 mask, u8 val)
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{
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u32 readval;
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int ret;
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ret = ov2680_read_reg(sensor, reg, &readval);
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if (ret < 0)
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return ret;
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readval &= ~mask;
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val &= mask;
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val |= readval;
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return ov2680_write_reg(sensor, reg, val);
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}
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static int ov2680_load_regs(struct ov2680_dev *sensor,
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const struct ov2680_mode_info *mode)
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{
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const struct reg_value *regs = mode->reg_data;
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unsigned int i;
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int ret = 0;
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u16 reg_addr;
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u8 val;
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for (i = 0; i < mode->reg_data_size; ++i, ++regs) {
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reg_addr = regs->reg_addr;
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val = regs->val;
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ret = ov2680_write_reg(sensor, reg_addr, val);
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if (ret)
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break;
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}
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return ret;
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}
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static void ov2680_power_up(struct ov2680_dev *sensor)
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{
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if (!sensor->reset_gpio)
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return;
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gpiod_set_value(sensor->reset_gpio, 0);
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usleep_range(5000, 10000);
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}
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static void ov2680_power_down(struct ov2680_dev *sensor)
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{
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if (!sensor->reset_gpio)
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return;
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gpiod_set_value(sensor->reset_gpio, 1);
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usleep_range(5000, 10000);
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}
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static int ov2680_bayer_order(struct ov2680_dev *sensor)
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{
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u32 format1;
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u32 format2;
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u32 hv_flip;
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int ret;
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ret = ov2680_read_reg(sensor, OV2680_REG_FORMAT1, &format1);
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if (ret < 0)
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return ret;
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ret = ov2680_read_reg(sensor, OV2680_REG_FORMAT2, &format2);
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if (ret < 0)
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return ret;
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hv_flip = (format2 & BIT(2) << 1) | (format1 & BIT(2));
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sensor->fmt.code = ov2680_hv_flip_bayer_order[hv_flip];
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return 0;
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}
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static int ov2680_vflip_enable(struct ov2680_dev *sensor)
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{
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int ret;
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ret = ov2680_mod_reg(sensor, OV2680_REG_FORMAT1, BIT(2), BIT(2));
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if (ret < 0)
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return ret;
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return ov2680_bayer_order(sensor);
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}
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static int ov2680_vflip_disable(struct ov2680_dev *sensor)
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{
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int ret;
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ret = ov2680_mod_reg(sensor, OV2680_REG_FORMAT1, BIT(2), BIT(0));
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if (ret < 0)
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return ret;
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return ov2680_bayer_order(sensor);
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}
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static int ov2680_hflip_enable(struct ov2680_dev *sensor)
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{
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int ret;
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ret = ov2680_mod_reg(sensor, OV2680_REG_FORMAT2, BIT(2), BIT(2));
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if (ret < 0)
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return ret;
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return ov2680_bayer_order(sensor);
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}
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static int ov2680_hflip_disable(struct ov2680_dev *sensor)
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{
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int ret;
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ret = ov2680_mod_reg(sensor, OV2680_REG_FORMAT2, BIT(2), BIT(0));
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if (ret < 0)
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return ret;
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return ov2680_bayer_order(sensor);
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}
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static int ov2680_test_pattern_set(struct ov2680_dev *sensor, int value)
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{
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int ret;
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if (!value)
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return ov2680_mod_reg(sensor, OV2680_REG_ISP_CTRL00, BIT(7), 0);
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ret = ov2680_mod_reg(sensor, OV2680_REG_ISP_CTRL00, 0x03, value - 1);
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if (ret < 0)
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return ret;
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ret = ov2680_mod_reg(sensor, OV2680_REG_ISP_CTRL00, BIT(7), BIT(7));
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if (ret < 0)
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return ret;
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return 0;
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}
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static int ov2680_gain_set(struct ov2680_dev *sensor, bool auto_gain)
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{
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struct ov2680_ctrls *ctrls = &sensor->ctrls;
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u32 gain;
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int ret;
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ret = ov2680_mod_reg(sensor, OV2680_REG_R_MANUAL, BIT(1),
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auto_gain ? 0 : BIT(1));
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if (ret < 0)
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return ret;
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if (auto_gain || !ctrls->gain->is_new)
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return 0;
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gain = ctrls->gain->val;
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ret = ov2680_write_reg16(sensor, OV2680_REG_GAIN_PK, gain);
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return 0;
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}
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static int ov2680_gain_get(struct ov2680_dev *sensor)
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{
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u32 gain;
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int ret;
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ret = ov2680_read_reg16(sensor, OV2680_REG_GAIN_PK, &gain);
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if (ret)
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return ret;
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return gain;
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}
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static int ov2680_exposure_set(struct ov2680_dev *sensor, bool auto_exp)
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{
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struct ov2680_ctrls *ctrls = &sensor->ctrls;
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u32 exp;
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int ret;
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ret = ov2680_mod_reg(sensor, OV2680_REG_R_MANUAL, BIT(0),
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auto_exp ? 0 : BIT(0));
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if (ret < 0)
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return ret;
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if (auto_exp || !ctrls->exposure->is_new)
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return 0;
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exp = (u32)ctrls->exposure->val;
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exp <<= 4;
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return ov2680_write_reg24(sensor, OV2680_REG_EXPOSURE_PK_HIGH, exp);
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}
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static int ov2680_exposure_get(struct ov2680_dev *sensor)
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{
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int ret;
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u32 exp;
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ret = ov2680_read_reg24(sensor, OV2680_REG_EXPOSURE_PK_HIGH, &exp);
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if (ret)
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return ret;
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return exp >> 4;
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}
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static int ov2680_stream_enable(struct ov2680_dev *sensor)
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{
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return ov2680_write_reg(sensor, OV2680_REG_STREAM_CTRL, 1);
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}
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static int ov2680_stream_disable(struct ov2680_dev *sensor)
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{
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return ov2680_write_reg(sensor, OV2680_REG_STREAM_CTRL, 0);
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}
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static int ov2680_mode_set(struct ov2680_dev *sensor)
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{
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struct ov2680_ctrls *ctrls = &sensor->ctrls;
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int ret;
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ret = ov2680_gain_set(sensor, false);
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if (ret < 0)
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return ret;
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|
ret = ov2680_exposure_set(sensor, false);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = ov2680_load_regs(sensor, sensor->current_mode);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (ctrls->auto_gain->val) {
|
|
ret = ov2680_gain_set(sensor, true);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if (ctrls->auto_exp->val == V4L2_EXPOSURE_AUTO) {
|
|
ret = ov2680_exposure_set(sensor, true);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
sensor->mode_pending_changes = false;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ov2680_mode_restore(struct ov2680_dev *sensor)
|
|
{
|
|
int ret;
|
|
|
|
ret = ov2680_load_regs(sensor, &ov2680_mode_init_data);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return ov2680_mode_set(sensor);
|
|
}
|
|
|
|
static int ov2680_power_off(struct ov2680_dev *sensor)
|
|
{
|
|
if (!sensor->is_enabled)
|
|
return 0;
|
|
|
|
clk_disable_unprepare(sensor->xvclk);
|
|
ov2680_power_down(sensor);
|
|
regulator_bulk_disable(OV2680_NUM_SUPPLIES, sensor->supplies);
|
|
sensor->is_enabled = false;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ov2680_power_on(struct ov2680_dev *sensor)
|
|
{
|
|
struct device *dev = ov2680_to_dev(sensor);
|
|
int ret;
|
|
|
|
if (sensor->is_enabled)
|
|
return 0;
|
|
|
|
ret = regulator_bulk_enable(OV2680_NUM_SUPPLIES, sensor->supplies);
|
|
if (ret < 0) {
|
|
dev_err(dev, "failed to enable regulators: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (!sensor->reset_gpio) {
|
|
ret = ov2680_write_reg(sensor, OV2680_REG_SOFT_RESET, 0x01);
|
|
if (ret != 0) {
|
|
dev_err(dev, "sensor soft reset failed\n");
|
|
return ret;
|
|
}
|
|
usleep_range(1000, 2000);
|
|
} else {
|
|
ov2680_power_down(sensor);
|
|
ov2680_power_up(sensor);
|
|
}
|
|
|
|
ret = clk_prepare_enable(sensor->xvclk);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
sensor->is_enabled = true;
|
|
|
|
/* Set clock lane into LP-11 state */
|
|
ov2680_stream_enable(sensor);
|
|
usleep_range(1000, 2000);
|
|
ov2680_stream_disable(sensor);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ov2680_s_power(struct v4l2_subdev *sd, int on)
|
|
{
|
|
struct ov2680_dev *sensor = to_ov2680_dev(sd);
|
|
int ret = 0;
|
|
|
|
mutex_lock(&sensor->lock);
|
|
|
|
if (on)
|
|
ret = ov2680_power_on(sensor);
|
|
else
|
|
ret = ov2680_power_off(sensor);
|
|
|
|