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1167 lines
26 KiB
1167 lines
26 KiB
// 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); |
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if (ret < 0) |
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return ret; |
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ret = ov2680_load_regs(sensor, sensor->current_mode); |
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if (ret < 0) |
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return ret; |
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if (ctrls->auto_gain->val) { |
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ret = ov2680_gain_set(sensor, true); |
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if (ret < 0) |
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return ret; |
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} |
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if (ctrls->auto_exp->val == V4L2_EXPOSURE_AUTO) { |
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ret = ov2680_exposure_set(sensor, true); |
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if (ret < 0) |
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return ret; |
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} |
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sensor->mode_pending_changes = false; |
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return 0; |
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} |
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static int ov2680_mode_restore(struct ov2680_dev *sensor) |
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{ |
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int ret; |
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ret = ov2680_load_regs(sensor, &ov2680_mode_init_data); |
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if (ret < 0) |
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return ret; |
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return ov2680_mode_set(sensor); |
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} |
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static int ov2680_power_off(struct ov2680_dev *sensor) |
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{ |
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if (!sensor->is_enabled) |
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return 0; |
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clk_disable_unprepare(sensor->xvclk); |
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ov2680_power_down(sensor); |
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regulator_bulk_disable(OV2680_NUM_SUPPLIES, sensor->supplies); |
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sensor->is_enabled = false; |
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return 0; |
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} |
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static int ov2680_power_on(struct ov2680_dev *sensor) |
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{ |
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struct device *dev = ov2680_to_dev(sensor); |
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int ret; |
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|
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if (sensor->is_enabled) |
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return 0; |
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|
|
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); |
|
|
|
mutex_unlock(&sensor->lock); |
|
|
|
if (on && ret == 0) { |
|
ret = v4l2_ctrl_handler_setup(&sensor->ctrls.handler); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ret = ov2680_mode_restore(sensor); |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static int ov2680_s_g_frame_interval(struct v4l2_subdev *sd, |
|
struct v4l2_subdev_frame_interval *fi) |
|
{ |
|
struct ov2680_dev *sensor = to_ov2680_dev(sd); |
|
|
|
mutex_lock(&sensor->lock); |
|
fi->interval = sensor->frame_interval; |
|
mutex_unlock(&sensor->lock); |
|
|
|
return 0; |
|
} |
|
|
|
static int ov2680_s_stream(struct v4l2_subdev *sd, int enable) |
|
{ |
|
struct ov2680_dev *sensor = to_ov2680_dev(sd); |
|
int ret = 0; |
|
|
|
mutex_lock(&sensor->lock); |
|
|
|
if (sensor->is_streaming == !!enable) |
|
goto unlock; |
|
|
|
if (enable && sensor->mode_pending_changes) { |
|
ret = ov2680_mode_set(sensor); |
|
if (ret < 0) |
|
goto unlock; |
|
} |
|
|
|
if (enable) |
|
ret = ov2680_stream_enable(sensor); |
|
else |
|
ret = ov2680_stream_disable(sensor); |
|
|
|
sensor->is_streaming = !!enable; |
|
|
|
unlock: |
|
mutex_unlock(&sensor->lock); |
|
|
|
return ret; |
|
} |
|
|
|
static int ov2680_enum_mbus_code(struct v4l2_subdev *sd, |
|
struct v4l2_subdev_pad_config *cfg, |
|
struct v4l2_subdev_mbus_code_enum *code) |
|
{ |
|
struct ov2680_dev *sensor = to_ov2680_dev(sd); |
|
|
|
if (code->pad != 0 || code->index != 0) |
|
return -EINVAL; |
|
|
|
code->code = sensor->fmt.code; |
|
|
|
return 0; |
|
} |
|
|
|
static int ov2680_get_fmt(struct v4l2_subdev *sd, |
|
struct v4l2_subdev_pad_config *cfg, |
|
struct v4l2_subdev_format *format) |
|
{ |
|
struct ov2680_dev *sensor = to_ov2680_dev(sd); |
|
struct v4l2_mbus_framefmt *fmt = NULL; |
|
int ret = 0; |
|
|
|
if (format->pad != 0) |
|
return -EINVAL; |
|
|
|
mutex_lock(&sensor->lock); |
|
|
|
if (format->which == V4L2_SUBDEV_FORMAT_TRY) { |
|
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API |
|
fmt = v4l2_subdev_get_try_format(&sensor->sd, cfg, format->pad); |
|
#else |
|
ret = -EINVAL; |
|
#endif |
|
} else { |
|
fmt = &sensor->fmt; |
|
} |
|
|
|
if (fmt) |
|
format->format = *fmt; |
|
|
|
mutex_unlock(&sensor->lock); |
|
|
|
return ret; |
|
} |
|
|
|
static int ov2680_set_fmt(struct v4l2_subdev *sd, |
|
struct v4l2_subdev_pad_config *cfg, |
|
struct v4l2_subdev_format *format) |
|
{ |
|
struct ov2680_dev *sensor = to_ov2680_dev(sd); |
|
struct v4l2_mbus_framefmt *fmt = &format->format; |
|
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API |
|
struct v4l2_mbus_framefmt *try_fmt; |
|
#endif |
|
const struct ov2680_mode_info *mode; |
|
int ret = 0; |
|
|
|
if (format->pad != 0) |
|
return -EINVAL; |
|
|
|
mutex_lock(&sensor->lock); |
|
|
|
if (sensor->is_streaming) { |
|
ret = -EBUSY; |
|
goto unlock; |
|
} |
|
|
|
mode = v4l2_find_nearest_size(ov2680_mode_data, |
|
ARRAY_SIZE(ov2680_mode_data), width, |
|
height, fmt->width, fmt->height); |
|
if (!mode) { |
|
ret = -EINVAL; |
|
goto unlock; |
|
} |
|
|
|
if (format->which == V4L2_SUBDEV_FORMAT_TRY) { |
|
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API |
|
try_fmt = v4l2_subdev_get_try_format(sd, cfg, 0); |
|
format->format = *try_fmt; |
|
#endif |
|
goto unlock; |
|
} |
|
|
|
fmt->width = mode->width; |
|
fmt->height = mode->height; |
|
fmt->code = sensor->fmt.code; |
|
fmt->colorspace = sensor->fmt.colorspace; |
|
|
|
sensor->current_mode = mode; |
|
sensor->fmt = format->format; |
|
sensor->mode_pending_changes = true; |
|
|
|
unlock: |
|
mutex_unlock(&sensor->lock); |
|
|
|
return ret; |
|
} |
|
|
|
static int ov2680_init_cfg(struct v4l2_subdev *sd, |
|
struct v4l2_subdev_pad_config *cfg) |
|
{ |
|
struct v4l2_subdev_format fmt = { |
|
.which = cfg ? V4L2_SUBDEV_FORMAT_TRY |
|
: V4L2_SUBDEV_FORMAT_ACTIVE, |
|
.format = { |
|
.width = 800, |
|
.height = 600, |
|
} |
|
}; |
|
|
|
return ov2680_set_fmt(sd, cfg, &fmt); |
|
} |
|
|
|
static int ov2680_enum_frame_size(struct v4l2_subdev *sd, |
|
struct v4l2_subdev_pad_config *cfg, |
|
struct v4l2_subdev_frame_size_enum *fse) |
|
{ |
|
int index = fse->index; |
|
|
|
if (index >= OV2680_MODE_MAX || index < 0) |
|
return -EINVAL; |
|
|
|
fse->min_width = ov2680_mode_data[index].width; |
|
fse->min_height = ov2680_mode_data[index].height; |
|
fse->max_width = ov2680_mode_data[index].width; |
|
fse->max_height = ov2680_mode_data[index].height; |
|
|
|
return 0; |
|
} |
|
|
|
static int ov2680_enum_frame_interval(struct v4l2_subdev *sd, |
|
struct v4l2_subdev_pad_config *cfg, |
|
struct v4l2_subdev_frame_interval_enum *fie) |
|
{ |
|
struct v4l2_fract tpf; |
|
|
|
if (fie->index >= OV2680_MODE_MAX || fie->width > OV2680_WIDTH_MAX || |
|
fie->height > OV2680_HEIGHT_MAX || |
|
fie->which > V4L2_SUBDEV_FORMAT_ACTIVE) |
|
return -EINVAL; |
|
|
|
tpf.denominator = OV2680_FRAME_RATE; |
|
tpf.numerator = 1; |
|
|
|
fie->interval = tpf; |
|
|
|
return 0; |
|
} |
|
|
|
static int ov2680_g_volatile_ctrl(struct v4l2_ctrl *ctrl) |
|
{ |
|
struct v4l2_subdev *sd = ctrl_to_sd(ctrl); |
|
struct ov2680_dev *sensor = to_ov2680_dev(sd); |
|
struct ov2680_ctrls *ctrls = &sensor->ctrls; |
|
int val; |
|
|
|
if (!sensor->is_enabled) |
|
return 0; |
|
|
|
switch (ctrl->id) { |
|
case V4L2_CID_GAIN: |
|
val = ov2680_gain_get(sensor); |
|
if (val < 0) |
|
return val; |
|
ctrls->gain->val = val; |
|
break; |
|
case V4L2_CID_EXPOSURE: |
|
val = ov2680_exposure_get(sensor); |
|
if (val < 0) |
|
return val; |
|
ctrls->exposure->val = val; |
|
break; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int ov2680_s_ctrl(struct v4l2_ctrl *ctrl) |
|
{ |
|
struct v4l2_subdev *sd = ctrl_to_sd(ctrl); |
|
struct ov2680_dev *sensor = to_ov2680_dev(sd); |
|
struct ov2680_ctrls *ctrls = &sensor->ctrls; |
|
|
|
if (!sensor->is_enabled) |
|
return 0; |
|
|
|
switch (ctrl->id) { |
|
case V4L2_CID_AUTOGAIN: |
|
return ov2680_gain_set(sensor, !!ctrl->val); |
|
case V4L2_CID_GAIN: |
|
return ov2680_gain_set(sensor, !!ctrls->auto_gain->val); |
|
case V4L2_CID_EXPOSURE_AUTO: |
|
return ov2680_exposure_set(sensor, !!ctrl->val); |
|
case V4L2_CID_EXPOSURE: |
|
return ov2680_exposure_set(sensor, !!ctrls->auto_exp->val); |
|
case V4L2_CID_VFLIP: |
|
if (sensor->is_streaming) |
|
return -EBUSY; |
|
if (ctrl->val) |
|
return ov2680_vflip_enable(sensor); |
|
else |
|
return ov2680_vflip_disable(sensor); |
|
case V4L2_CID_HFLIP: |
|
if (sensor->is_streaming) |
|
return -EBUSY; |
|
if (ctrl->val) |
|
return ov2680_hflip_enable(sensor); |
|
else |
|
return ov2680_hflip_disable(sensor); |
|
case V4L2_CID_TEST_PATTERN: |
|
return ov2680_test_pattern_set(sensor, ctrl->val); |
|
default: |
|
break; |
|
} |
|
|
|
return -EINVAL; |
|
} |
|
|
|
static const struct v4l2_ctrl_ops ov2680_ctrl_ops = { |
|
.g_volatile_ctrl = ov2680_g_volatile_ctrl, |
|
.s_ctrl = ov2680_s_ctrl, |
|
}; |
|
|
|
static const struct v4l2_subdev_core_ops ov2680_core_ops = { |
|
.s_power = ov2680_s_power, |
|
}; |
|
|
|
static const struct v4l2_subdev_video_ops ov2680_video_ops = { |
|
.g_frame_interval = ov2680_s_g_frame_interval, |
|
.s_frame_interval = ov2680_s_g_frame_interval, |
|
.s_stream = ov2680_s_stream, |
|
}; |
|
|
|
static const struct v4l2_subdev_pad_ops ov2680_pad_ops = { |
|
.init_cfg = ov2680_init_cfg, |
|
.enum_mbus_code = ov2680_enum_mbus_code, |
|
.get_fmt = ov2680_get_fmt, |
|
.set_fmt = ov2680_set_fmt, |
|
.enum_frame_size = ov2680_enum_frame_size, |
|
.enum_frame_interval = ov2680_enum_frame_interval, |
|
}; |
|
|
|
static const struct v4l2_subdev_ops ov2680_subdev_ops = { |
|
.core = &ov2680_core_ops, |
|
.video = &ov2680_video_ops, |
|
.pad = &ov2680_pad_ops, |
|
}; |
|
|
|
static int ov2680_mode_init(struct ov2680_dev *sensor) |
|
{ |
|
const struct ov2680_mode_info *init_mode; |
|
|
|
/* set initial mode */ |
|
sensor->fmt.code = MEDIA_BUS_FMT_SBGGR10_1X10; |
|
sensor->fmt.width = 800; |
|
sensor->fmt.height = 600; |
|
sensor->fmt.field = V4L2_FIELD_NONE; |
|
sensor->fmt.colorspace = V4L2_COLORSPACE_SRGB; |
|
|
|
sensor->frame_interval.denominator = OV2680_FRAME_RATE; |
|
sensor->frame_interval.numerator = 1; |
|
|
|
init_mode = &ov2680_mode_init_data; |
|
|
|
sensor->current_mode = init_mode; |
|
|
|
sensor->mode_pending_changes = true; |
|
|
|
return 0; |
|
} |
|
|
|
static int ov2680_v4l2_register(struct ov2680_dev *sensor) |
|
{ |
|
const struct v4l2_ctrl_ops *ops = &ov2680_ctrl_ops; |
|
struct ov2680_ctrls *ctrls = &sensor->ctrls; |
|
struct v4l2_ctrl_handler *hdl = &ctrls->handler; |
|
int ret = 0; |
|
|
|
v4l2_i2c_subdev_init(&sensor->sd, sensor->i2c_client, |
|
&ov2680_subdev_ops); |
|
|
|
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API |
|
sensor->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE; |
|
#endif |
|
sensor->pad.flags = MEDIA_PAD_FL_SOURCE; |
|
sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; |
|
|
|
ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad); |
|
if (ret < 0) |
|
return ret; |
|
|
|
v4l2_ctrl_handler_init(hdl, 7); |
|
|
|
hdl->lock = &sensor->lock; |
|
|
|
ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0); |
|
ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0); |
|
|
|
ctrls->test_pattern = v4l2_ctrl_new_std_menu_items(hdl, |
|
&ov2680_ctrl_ops, V4L2_CID_TEST_PATTERN, |
|
ARRAY_SIZE(test_pattern_menu) - 1, |
|
0, 0, test_pattern_menu); |
|
|
|
ctrls->auto_exp = v4l2_ctrl_new_std_menu(hdl, ops, |
|
V4L2_CID_EXPOSURE_AUTO, |
|
V4L2_EXPOSURE_MANUAL, 0, |
|
V4L2_EXPOSURE_AUTO); |
|
|
|
ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE, |
|
0, 32767, 1, 0); |
|
|
|
ctrls->auto_gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTOGAIN, |
|
0, 1, 1, 1); |
|
ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN, 0, 2047, 1, 0); |
|
|
|
if (hdl->error) { |
|
ret = hdl->error; |
|
goto cleanup_entity; |
|
} |
|
|
|
ctrls->gain->flags |= V4L2_CTRL_FLAG_VOLATILE; |
|
ctrls->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE; |
|
|
|
v4l2_ctrl_auto_cluster(2, &ctrls->auto_gain, 0, true); |
|
v4l2_ctrl_auto_cluster(2, &ctrls->auto_exp, 1, true); |
|
|
|
sensor->sd.ctrl_handler = hdl; |
|
|
|
ret = v4l2_async_register_subdev(&sensor->sd); |
|
if (ret < 0) |
|
goto cleanup_entity; |
|
|
|
return 0; |
|
|
|
cleanup_entity: |
|
media_entity_cleanup(&sensor->sd.entity); |
|
v4l2_ctrl_handler_free(hdl); |
|
|
|
return ret; |
|
} |
|
|
|
static int ov2680_get_regulators(struct ov2680_dev *sensor) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < OV2680_NUM_SUPPLIES; i++) |
|
sensor->supplies[i].supply = ov2680_supply_name[i]; |
|
|
|
return devm_regulator_bulk_get(&sensor->i2c_client->dev, |
|
OV2680_NUM_SUPPLIES, |
|
sensor->supplies); |
|
} |
|
|
|
static int ov2680_check_id(struct ov2680_dev *sensor) |
|
{ |
|
struct device *dev = ov2680_to_dev(sensor); |
|
u32 chip_id; |
|
int ret; |
|
|
|
ov2680_power_on(sensor); |
|
|
|
ret = ov2680_read_reg16(sensor, OV2680_REG_CHIP_ID_HIGH, &chip_id); |
|
if (ret < 0) { |
|
dev_err(dev, "failed to read chip id high\n"); |
|
return -ENODEV; |
|
} |
|
|
|
if (chip_id != OV2680_CHIP_ID) { |
|
dev_err(dev, "chip id: 0x%04x does not match expected 0x%04x\n", |
|
chip_id, OV2680_CHIP_ID); |
|
return -ENODEV; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int ov2680_parse_dt(struct ov2680_dev *sensor) |
|
{ |
|
struct device *dev = ov2680_to_dev(sensor); |
|
int ret; |
|
|
|
sensor->reset_gpio = devm_gpiod_get_optional(dev, "reset", |
|
GPIOD_OUT_HIGH); |
|
ret = PTR_ERR_OR_ZERO(sensor->reset_gpio); |
|
if (ret < 0) { |
|
dev_dbg(dev, "error while getting reset gpio: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
sensor->xvclk = devm_clk_get(dev, "xvclk"); |
|
if (IS_ERR(sensor->xvclk)) { |
|
dev_err(dev, "xvclk clock missing or invalid\n"); |
|
return PTR_ERR(sensor->xvclk); |
|
} |
|
|
|
sensor->xvclk_freq = clk_get_rate(sensor->xvclk); |
|
if (sensor->xvclk_freq != OV2680_XVCLK_VALUE) { |
|
dev_err(dev, "wrong xvclk frequency %d HZ, expected: %d Hz\n", |
|
sensor->xvclk_freq, OV2680_XVCLK_VALUE); |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int ov2680_probe(struct i2c_client *client) |
|
{ |
|
struct device *dev = &client->dev; |
|
struct ov2680_dev *sensor; |
|
int ret; |
|
|
|
sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL); |
|
if (!sensor) |
|
return -ENOMEM; |
|
|
|
sensor->i2c_client = client; |
|
|
|
ret = ov2680_parse_dt(sensor); |
|
if (ret < 0) |
|
return -EINVAL; |
|
|
|
ret = ov2680_mode_init(sensor); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ret = ov2680_get_regulators(sensor); |
|
if (ret < 0) { |
|
dev_err(dev, "failed to get regulators\n"); |
|
return ret; |
|
} |
|
|
|
mutex_init(&sensor->lock); |
|
|
|
ret = ov2680_check_id(sensor); |
|
if (ret < 0) |
|
goto lock_destroy; |
|
|
|
ret = ov2680_v4l2_register(sensor); |
|
if (ret < 0) |
|
goto lock_destroy; |
|
|
|
dev_info(dev, "ov2680 init correctly\n"); |
|
|
|
return 0; |
|
|
|
lock_destroy: |
|
dev_err(dev, "ov2680 init fail: %d\n", ret); |
|
mutex_destroy(&sensor->lock); |
|
|
|
return ret; |
|
} |
|
|
|
static int ov2680_remove(struct i2c_client *client) |
|
{ |
|
struct v4l2_subdev *sd = i2c_get_clientdata(client); |
|
struct ov2680_dev *sensor = to_ov2680_dev(sd); |
|
|
|
v4l2_async_unregister_subdev(&sensor->sd); |
|
mutex_destroy(&sensor->lock); |
|
media_entity_cleanup(&sensor->sd.entity); |
|
v4l2_ctrl_handler_free(&sensor->ctrls.handler); |
|
|
|
return 0; |
|
} |
|
|
|
static int __maybe_unused ov2680_suspend(struct device *dev) |
|
{ |
|
struct v4l2_subdev *sd = dev_get_drvdata(dev); |
|
struct ov2680_dev *sensor = to_ov2680_dev(sd); |
|
|
|
if (sensor->is_streaming) |
|
ov2680_stream_disable(sensor); |
|
|
|
return 0; |
|
} |
|
|
|
static int __maybe_unused ov2680_resume(struct device *dev) |
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{ |
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struct v4l2_subdev *sd = dev_get_drvdata(dev); |
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struct ov2680_dev *sensor = to_ov2680_dev(sd); |
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int ret; |
|
|
|
if (sensor->is_streaming) { |
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ret = ov2680_stream_enable(sensor); |
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if (ret < 0) |
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goto stream_disable; |
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} |
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|
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return 0; |
|
|
|
stream_disable: |
|
ov2680_stream_disable(sensor); |
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sensor->is_streaming = false; |
|
|
|
return ret; |
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} |
|
|
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static const struct dev_pm_ops ov2680_pm_ops = { |
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SET_SYSTEM_SLEEP_PM_OPS(ov2680_suspend, ov2680_resume) |
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}; |
|
|
|
static const struct of_device_id ov2680_dt_ids[] = { |
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{ .compatible = "ovti,ov2680" }, |
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{ /* sentinel */ }, |
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}; |
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MODULE_DEVICE_TABLE(of, ov2680_dt_ids); |
|
|
|
static struct i2c_driver ov2680_i2c_driver = { |
|
.driver = { |
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.name = "ov2680", |
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.pm = &ov2680_pm_ops, |
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.of_match_table = of_match_ptr(ov2680_dt_ids), |
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}, |
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.probe_new = ov2680_probe, |
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.remove = ov2680_remove, |
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}; |
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module_i2c_driver(ov2680_i2c_driver); |
|
|
|
MODULE_AUTHOR("Rui Miguel Silva <[email protected]>"); |
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MODULE_DESCRIPTION("OV2680 CMOS Image Sensor driver"); |
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MODULE_LICENSE("GPL v2");
|
|
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