| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Omnivision OV2680 CMOS Image Sensor driver |
| * |
| * Copyright (C) 2018 Linaro Ltd |
| * |
| * Based on OV5640 Sensor Driver |
| * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved. |
| * Copyright (C) 2014-2017 Mentor Graphics Inc. |
| * |
| */ |
| |
| #include <asm/unaligned.h> |
| #include <linux/clk.h> |
| #include <linux/delay.h> |
| #include <linux/err.h> |
| #include <linux/i2c.h> |
| #include <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/of_device.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/regulator/consumer.h> |
| |
| #include <media/v4l2-common.h> |
| #include <media/v4l2-ctrls.h> |
| #include <media/v4l2-subdev.h> |
| |
| #define OV2680_XVCLK_VALUE 24000000 |
| |
| #define OV2680_CHIP_ID 0x2680 |
| |
| #define OV2680_REG_STREAM_CTRL 0x0100 |
| #define OV2680_REG_SOFT_RESET 0x0103 |
| |
| #define OV2680_REG_CHIP_ID_HIGH 0x300a |
| #define OV2680_REG_CHIP_ID_LOW 0x300b |
| |
| #define OV2680_REG_R_MANUAL 0x3503 |
| #define OV2680_REG_GAIN_PK 0x350a |
| #define OV2680_REG_EXPOSURE_PK_HIGH 0x3500 |
| #define OV2680_REG_TIMING_HTS 0x380c |
| #define OV2680_REG_TIMING_VTS 0x380e |
| #define OV2680_REG_FORMAT1 0x3820 |
| #define OV2680_REG_FORMAT2 0x3821 |
| |
| #define OV2680_REG_ISP_CTRL00 0x5080 |
| |
| #define OV2680_FRAME_RATE 30 |
| |
| #define OV2680_REG_VALUE_8BIT 1 |
| #define OV2680_REG_VALUE_16BIT 2 |
| #define OV2680_REG_VALUE_24BIT 3 |
| |
| #define OV2680_WIDTH_MAX 1600 |
| #define OV2680_HEIGHT_MAX 1200 |
| |
| enum ov2680_mode_id { |
| OV2680_MODE_QUXGA_800_600, |
| OV2680_MODE_720P_1280_720, |
| OV2680_MODE_UXGA_1600_1200, |
| OV2680_MODE_MAX, |
| }; |
| |
| struct reg_value { |
| u16 reg_addr; |
| u8 val; |
| }; |
| |
| static const char * const ov2680_supply_name[] = { |
| "DOVDD", |
| "DVDD", |
| "AVDD", |
| }; |
| |
| #define OV2680_NUM_SUPPLIES ARRAY_SIZE(ov2680_supply_name) |
| |
| struct ov2680_mode_info { |
| const char *name; |
| enum ov2680_mode_id id; |
| u32 width; |
| u32 height; |
| const struct reg_value *reg_data; |
| u32 reg_data_size; |
| }; |
| |
| struct ov2680_ctrls { |
| struct v4l2_ctrl_handler handler; |
| struct { |
| struct v4l2_ctrl *auto_exp; |
| struct v4l2_ctrl *exposure; |
| }; |
| struct { |
| struct v4l2_ctrl *auto_gain; |
| struct v4l2_ctrl *gain; |
| }; |
| |
| struct v4l2_ctrl *hflip; |
| struct v4l2_ctrl *vflip; |
| struct v4l2_ctrl *test_pattern; |
| }; |
| |
| struct ov2680_dev { |
| struct i2c_client *i2c_client; |
| struct v4l2_subdev sd; |
| |
| struct media_pad pad; |
| struct clk *xvclk; |
| u32 xvclk_freq; |
| struct regulator_bulk_data supplies[OV2680_NUM_SUPPLIES]; |
| |
| struct gpio_desc *reset_gpio; |
| struct mutex lock; /* protect members */ |
| |
| bool mode_pending_changes; |
| bool is_enabled; |
| bool is_streaming; |
| |
| struct ov2680_ctrls ctrls; |
| struct v4l2_mbus_framefmt fmt; |
| struct v4l2_fract frame_interval; |
| |
| const struct ov2680_mode_info *current_mode; |
| }; |
| |
| static const char * const test_pattern_menu[] = { |
| "Disabled", |
| "Color Bars", |
| "Random Data", |
| "Square", |
| "Black Image", |
| }; |
| |
| static const int ov2680_hv_flip_bayer_order[] = { |
| MEDIA_BUS_FMT_SBGGR10_1X10, |
| MEDIA_BUS_FMT_SGRBG10_1X10, |
| MEDIA_BUS_FMT_SGBRG10_1X10, |
| MEDIA_BUS_FMT_SRGGB10_1X10, |
| }; |
| |
| static const struct reg_value ov2680_setting_30fps_QUXGA_800_600[] = { |
| {0x3086, 0x01}, {0x370a, 0x23}, {0x3808, 0x03}, {0x3809, 0x20}, |
| {0x380a, 0x02}, {0x380b, 0x58}, {0x380c, 0x06}, {0x380d, 0xac}, |
| {0x380e, 0x02}, {0x380f, 0x84}, {0x3811, 0x04}, {0x3813, 0x04}, |
| {0x3814, 0x31}, {0x3815, 0x31}, {0x3820, 0xc0}, {0x4008, 0x00}, |
| {0x4009, 0x03}, {0x4837, 0x1e}, {0x3501, 0x4e}, {0x3502, 0xe0}, |
| }; |
| |
| static const struct reg_value ov2680_setting_30fps_720P_1280_720[] = { |
| {0x3086, 0x00}, {0x3808, 0x05}, {0x3809, 0x00}, {0x380a, 0x02}, |
| {0x380b, 0xd0}, {0x380c, 0x06}, {0x380d, 0xa8}, {0x380e, 0x05}, |
| {0x380f, 0x0e}, {0x3811, 0x08}, {0x3813, 0x06}, {0x3814, 0x11}, |
| {0x3815, 0x11}, {0x3820, 0xc0}, {0x4008, 0x00}, |
| }; |
| |
| static const struct reg_value ov2680_setting_30fps_UXGA_1600_1200[] = { |
| {0x3086, 0x00}, {0x3501, 0x4e}, {0x3502, 0xe0}, {0x3808, 0x06}, |
| {0x3809, 0x40}, {0x380a, 0x04}, {0x380b, 0xb0}, {0x380c, 0x06}, |
| {0x380d, 0xa8}, {0x380e, 0x05}, {0x380f, 0x0e}, {0x3811, 0x00}, |
| {0x3813, 0x00}, {0x3814, 0x11}, {0x3815, 0x11}, {0x3820, 0xc0}, |
| {0x4008, 0x00}, {0x4837, 0x18} |
| }; |
| |
| static const struct ov2680_mode_info ov2680_mode_init_data = { |
| "mode_quxga_800_600", OV2680_MODE_QUXGA_800_600, 800, 600, |
| ov2680_setting_30fps_QUXGA_800_600, |
| ARRAY_SIZE(ov2680_setting_30fps_QUXGA_800_600), |
| }; |
| |
| static const struct ov2680_mode_info ov2680_mode_data[OV2680_MODE_MAX] = { |
| {"mode_quxga_800_600", OV2680_MODE_QUXGA_800_600, |
| 800, 600, ov2680_setting_30fps_QUXGA_800_600, |
| ARRAY_SIZE(ov2680_setting_30fps_QUXGA_800_600)}, |
| {"mode_720p_1280_720", OV2680_MODE_720P_1280_720, |
| 1280, 720, ov2680_setting_30fps_720P_1280_720, |
| ARRAY_SIZE(ov2680_setting_30fps_720P_1280_720)}, |
| {"mode_uxga_1600_1200", OV2680_MODE_UXGA_1600_1200, |
| 1600, 1200, ov2680_setting_30fps_UXGA_1600_1200, |
| ARRAY_SIZE(ov2680_setting_30fps_UXGA_1600_1200)}, |
| }; |
| |
| static struct ov2680_dev *to_ov2680_dev(struct v4l2_subdev *sd) |
| { |
| return container_of(sd, struct ov2680_dev, sd); |
| } |
| |
| static struct device *ov2680_to_dev(struct ov2680_dev *sensor) |
| { |
| return &sensor->i2c_client->dev; |
| } |
| |
| static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl) |
| { |
| return &container_of(ctrl->handler, struct ov2680_dev, |
| ctrls.handler)->sd; |
| } |
| |
| static int __ov2680_write_reg(struct ov2680_dev *sensor, u16 reg, |
| unsigned int len, u32 val) |
| { |
| struct i2c_client *client = sensor->i2c_client; |
| u8 buf[6]; |
| int ret; |
| |
| if (len > 4) |
| return -EINVAL; |
| |
| put_unaligned_be16(reg, buf); |
| put_unaligned_be32(val << (8 * (4 - len)), buf + 2); |
| ret = i2c_master_send(client, buf, len + 2); |
| if (ret != len + 2) { |
| dev_err(&client->dev, "write error: reg=0x%4x: %d\n", reg, ret); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| #define ov2680_write_reg(s, r, v) \ |
| __ov2680_write_reg(s, r, OV2680_REG_VALUE_8BIT, v) |
| |
| #define ov2680_write_reg16(s, r, v) \ |
| __ov2680_write_reg(s, r, OV2680_REG_VALUE_16BIT, v) |
| |
| #define ov2680_write_reg24(s, r, v) \ |
| __ov2680_write_reg(s, r, OV2680_REG_VALUE_24BIT, v) |
| |
| static int __ov2680_read_reg(struct ov2680_dev *sensor, u16 reg, |
| unsigned int len, u32 *val) |
| { |
| struct i2c_client *client = sensor->i2c_client; |
| struct i2c_msg msgs[2]; |
| u8 addr_buf[2] = { reg >> 8, reg & 0xff }; |
| u8 data_buf[4] = { 0, }; |
| int ret; |
| |
| if (len > 4) |
| return -EINVAL; |
| |
| msgs[0].addr = client->addr; |
| msgs[0].flags = 0; |
| msgs[0].len = ARRAY_SIZE(addr_buf); |
| msgs[0].buf = addr_buf; |
| |
| msgs[1].addr = client->addr; |
| msgs[1].flags = I2C_M_RD; |
| msgs[1].len = len; |
| msgs[1].buf = &data_buf[4 - len]; |
| |
| ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); |
| if (ret != ARRAY_SIZE(msgs)) { |
| dev_err(&client->dev, "read error: reg=0x%4x: %d\n", reg, ret); |
| return -EIO; |
| } |
| |
| *val = get_unaligned_be32(data_buf); |
| |
| return 0; |
| } |
| |
| #define ov2680_read_reg(s, r, v) \ |
| __ov2680_read_reg(s, r, OV2680_REG_VALUE_8BIT, v) |
| |
| #define ov2680_read_reg16(s, r, v) \ |
| __ov2680_read_reg(s, r, OV2680_REG_VALUE_16BIT, v) |
| |
| #define ov2680_read_reg24(s, r, v) \ |
| __ov2680_read_reg(s, r, OV2680_REG_VALUE_24BIT, v) |
| |
| static int ov2680_mod_reg(struct ov2680_dev *sensor, u16 reg, u8 mask, u8 val) |
| { |
| u32 readval; |
| int ret; |
| |
| ret = ov2680_read_reg(sensor, reg, &readval); |
| if (ret < 0) |
| return ret; |
| |
| readval &= ~mask; |
| val &= mask; |
| val |= readval; |
| |
| return ov2680_write_reg(sensor, reg, val); |
| } |
| |
| static int ov2680_load_regs(struct ov2680_dev *sensor, |
| const struct ov2680_mode_info *mode) |
| { |
| const struct reg_value *regs = mode->reg_data; |
| unsigned int i; |
| int ret = 0; |
| u16 reg_addr; |
| u8 val; |
| |
| for (i = 0; i < mode->reg_data_size; ++i, ++regs) { |
| reg_addr = regs->reg_addr; |
| val = regs->val; |
| |
| ret = ov2680_write_reg(sensor, reg_addr, val); |
| if (ret) |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static void ov2680_power_up(struct ov2680_dev *sensor) |
| { |
| if (!sensor->reset_gpio) |
| return; |
| |
| gpiod_set_value(sensor->reset_gpio, 0); |
| usleep_range(5000, 10000); |
| } |
| |
| static void ov2680_power_down(struct ov2680_dev *sensor) |
| { |
| if (!sensor->reset_gpio) |
| return; |
| |
| gpiod_set_value(sensor->reset_gpio, 1); |
| usleep_range(5000, 10000); |
| } |
| |
| static int ov2680_bayer_order(struct ov2680_dev *sensor) |
| { |
| u32 format1; |
| u32 format2; |
| u32 hv_flip; |
| int ret; |
| |
| ret = ov2680_read_reg(sensor, OV2680_REG_FORMAT1, &format1); |
| if (ret < 0) |
| return ret; |
| |
| ret = ov2680_read_reg(sensor, OV2680_REG_FORMAT2, &format2); |
| if (ret < 0) |
| return ret; |
| |
| hv_flip = (format2 & BIT(2) << 1) | (format1 & BIT(2)); |
| |
| sensor->fmt.code = ov2680_hv_flip_bayer_order[hv_flip]; |
| |
| return 0; |
| } |
| |
| static int ov2680_vflip_enable(struct ov2680_dev *sensor) |
| { |
| int ret; |
| |
| ret = ov2680_mod_reg(sensor, OV2680_REG_FORMAT1, BIT(2), BIT(2)); |
| if (ret < 0) |
| return ret; |
| |
| return ov2680_bayer_order(sensor); |
| } |
| |
| static int ov2680_vflip_disable(struct ov2680_dev *sensor) |
| { |
| int ret; |
| |
| ret = ov2680_mod_reg(sensor, OV2680_REG_FORMAT1, BIT(2), BIT(0)); |
| if (ret < 0) |
| return ret; |
| |
| return ov2680_bayer_order(sensor); |
| } |
| |
| static int ov2680_hflip_enable(struct ov2680_dev *sensor) |
| { |
| int ret; |
| |
| ret = ov2680_mod_reg(sensor, OV2680_REG_FORMAT2, BIT(2), BIT(2)); |
| if (ret < 0) |
| return ret; |
| |
| return ov2680_bayer_order(sensor); |
| } |
| |
| static int ov2680_hflip_disable(struct ov2680_dev *sensor) |
| { |
| int ret; |
| |
| ret = ov2680_mod_reg(sensor, OV2680_REG_FORMAT2, BIT(2), BIT(0)); |
| if (ret < 0) |
| return ret; |
| |
| return ov2680_bayer_order(sensor); |
| } |
| |
| static int ov2680_test_pattern_set(struct ov2680_dev *sensor, int value) |
| { |
| int ret; |
| |
| if (!value) |
| return ov2680_mod_reg(sensor, OV2680_REG_ISP_CTRL00, BIT(7), 0); |
| |
| ret = ov2680_mod_reg(sensor, OV2680_REG_ISP_CTRL00, 0x03, value - 1); |
| if (ret < 0) |
| return ret; |
| |
| ret = ov2680_mod_reg(sensor, OV2680_REG_ISP_CTRL00, BIT(7), BIT(7)); |
| if (ret < 0) |
| return ret; |
| |
| return 0; |
| } |
| |
| static int ov2680_gain_set(struct ov2680_dev *sensor, bool auto_gain) |
| { |
| struct ov2680_ctrls *ctrls = &sensor->ctrls; |
| u32 gain; |
| int ret; |
| |
| ret = ov2680_mod_reg(sensor, OV2680_REG_R_MANUAL, BIT(1), |
| auto_gain ? 0 : BIT(1)); |
| if (ret < 0) |
| return ret; |
| |
| if (auto_gain || !ctrls->gain->is_new) |
| return 0; |
| |
| gain = ctrls->gain->val; |
| |
| ret = ov2680_write_reg16(sensor, OV2680_REG_GAIN_PK, gain); |
| |
| return 0; |
| } |
| |
| static int ov2680_gain_get(struct ov2680_dev *sensor) |
| { |
| u32 gain; |
| int ret; |
| |
| ret = ov2680_read_reg16(sensor, OV2680_REG_GAIN_PK, &gain); |
| if (ret) |
| return ret; |
| |
| return gain; |
| } |
| |
| static int ov2680_exposure_set(struct ov2680_dev *sensor, bool auto_exp) |
| { |
| struct ov2680_ctrls *ctrls = &sensor->ctrls; |
| u32 exp; |
| int ret; |
| |
| ret = ov2680_mod_reg(sensor, OV2680_REG_R_MANUAL, BIT(0), |
| auto_exp ? 0 : BIT(0)); |
| if (ret < 0) |
| return ret; |
| |
| if (auto_exp || !ctrls->exposure->is_new) |
| return 0; |
| |
| exp = (u32)ctrls->exposure->val; |
| exp <<= 4; |
| |
| return ov2680_write_reg24(sensor, OV2680_REG_EXPOSURE_PK_HIGH, exp); |
| } |
| |
| static int ov2680_exposure_get(struct ov2680_dev *sensor) |
| { |
| int ret; |
| u32 exp; |
| |
| ret = ov2680_read_reg24(sensor, OV2680_REG_EXPOSURE_PK_HIGH, &exp); |
| if (ret) |
| return ret; |
| |
| return exp >> 4; |
| } |
| |
| static int ov2680_stream_enable(struct ov2680_dev *sensor) |
| { |
| return ov2680_write_reg(sensor, OV2680_REG_STREAM_CTRL, 1); |
| } |
| |
| static int ov2680_stream_disable(struct ov2680_dev *sensor) |
| { |
| return ov2680_write_reg(sensor, OV2680_REG_STREAM_CTRL, 0); |
| } |
| |
| static int ov2680_mode_set(struct ov2680_dev *sensor) |
| { |
| struct ov2680_ctrls *ctrls = &sensor->ctrls; |
| int ret; |
| |
| ret = ov2680_gain_set(sensor, false); |
| if (ret < 0) |
| return ret; |
| |
| 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); |
| |
| 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 ov2860_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 = ov2860_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 i2c_client *client = to_i2c_client(dev); |
| struct v4l2_subdev *sd = i2c_get_clientdata(client); |
| 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) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct v4l2_subdev *sd = i2c_get_clientdata(client); |
| struct ov2680_dev *sensor = to_ov2680_dev(sd); |
| int ret; |
| |
| if (sensor->is_streaming) { |
| ret = ov2680_stream_enable(sensor); |
| if (ret < 0) |
| goto stream_disable; |
| } |
| |
| return 0; |
| |
| stream_disable: |
| ov2680_stream_disable(sensor); |
| sensor->is_streaming = false; |
| |
| return ret; |
| } |
| |
| static const struct dev_pm_ops ov2680_pm_ops = { |
| SET_SYSTEM_SLEEP_PM_OPS(ov2680_suspend, ov2680_resume) |
| }; |
| |
| static const struct of_device_id ov2680_dt_ids[] = { |
| { .compatible = "ovti,ov2680" }, |
| { /* sentinel */ }, |
| }; |
| MODULE_DEVICE_TABLE(of, ov2680_dt_ids); |
| |
| static struct i2c_driver ov2680_i2c_driver = { |
| .driver = { |
| .name = "ov2680", |
| .pm = &ov2680_pm_ops, |
| .of_match_table = of_match_ptr(ov2680_dt_ids), |
| }, |
| .probe_new = ov2680_probe, |
| .remove = ov2680_remove, |
| }; |
| module_i2c_driver(ov2680_i2c_driver); |
| |
| MODULE_AUTHOR("Rui Miguel Silva <rui.silva@linaro.org>"); |
| MODULE_DESCRIPTION("OV2680 CMOS Image Sensor driver"); |
| MODULE_LICENSE("GPL v2"); |