From 12f88749b4a6b3a08bd8cf6733d030150e363f9b Mon Sep 17 00:00:00 2001 From: Rui Miguel Silva Date: Fri, 9 Feb 2018 11:26:27 +0000 Subject: media: ov2680: add ov2680 sensor driver Add driver to support the 2 megapixel CMOS image sensor from Omnivision, OV2680. This is based on the ov5640 driver. Signed-off-by: Rui Miguel Silva --- .../devicetree/bindings/media/i2c/ov2680.txt | 34 + drivers/media/i2c/Kconfig | 13 + drivers/media/i2c/Makefile | 1 + drivers/media/i2c/ov2680.c | 1194 ++++++++++++++++++++ 4 files changed, 1242 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/i2c/ov2680.txt create mode 100644 drivers/media/i2c/ov2680.c diff --git a/Documentation/devicetree/bindings/media/i2c/ov2680.txt b/Documentation/devicetree/bindings/media/i2c/ov2680.txt new file mode 100644 index 000000000000..b45980d5defd --- /dev/null +++ b/Documentation/devicetree/bindings/media/i2c/ov2680.txt @@ -0,0 +1,34 @@ +* Omnivision OV2680 MIPI CSI-2 sensor + +Required Properties: +- compatible: should be "ovti,ov2680" +- clocks: reference to the xvclk input clock. +- clock-names: should be "xvclk". + +Optional Properties: +- powerdown-gpios: reference to the GPIO connected to the powerdown pin, + if any. This is an active high signal to the OV2680. + +The device node must contain one 'port' child node for its digital output +video port, in accordance with the video interface bindings defined in +Documentation/devicetree/bindings/media/video-interfaces.txt. + +Example: + +&i2c2 { + ov2680: camera@36 { + compatible = "ovti,ov2680"; + reg = <0x36>; + clocks = <&osc>; + clock-names = "xvclk"; + powerdown-gpios = <&gpio1 3 GPIO_ACTIVE_HIGH>; + + port { + ov2680_mipi_ep: endpoint { + remote-endpoint = <&mipi_sensor_ep>; + clock-lanes = <0>; + data-lanes = <1>; + }; + }; + }; +}; diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 3bdc34deae7b..c3699d69ec42 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -570,6 +570,19 @@ config VIDEO_OV2659 To compile this driver as a module, choose M here: the module will be called ov2659. +config VIDEO_OV2680 + tristate "OmniVision OV2680 sensor support" + depends on OF + depends on GPIOLIB && VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API + depends on MEDIA_CAMERA_SUPPORT + select V4L2_FWNODE + ---help--- + This is a Video4Linux2 sensor-level driver for the OmniVision + OV2680 camera. + + To compile this driver as a module, choose M here: the + module will be called ov2680. + config VIDEO_OV5640 tristate "OmniVision OV5640 sensor support" depends on OF diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile index f104650d6000..a9b5dc12d567 100644 --- a/drivers/media/i2c/Makefile +++ b/drivers/media/i2c/Makefile @@ -61,6 +61,7 @@ obj-$(CONFIG_VIDEO_SONY_BTF_MPX) += sony-btf-mpx.o obj-$(CONFIG_VIDEO_UPD64031A) += upd64031a.o obj-$(CONFIG_VIDEO_UPD64083) += upd64083.o obj-$(CONFIG_VIDEO_OV2640) += ov2640.o +obj-$(CONFIG_VIDEO_OV2680) += ov2680.o obj-$(CONFIG_VIDEO_OV5640) += ov5640.o obj-$(CONFIG_VIDEO_OV5645) += ov5645.o obj-$(CONFIG_VIDEO_OV5647) += ov5647.o diff --git a/drivers/media/i2c/ov2680.c b/drivers/media/i2c/ov2680.c new file mode 100644 index 000000000000..2d64f1bdd4de --- /dev/null +++ b/drivers/media/i2c/ov2680.c @@ -0,0 +1,1194 @@ +// 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 +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include + +#define OV2680_XVCLK_MIN 6000000 +#define OV2680_XVCLK_MAX 24000000 + +#define OV2680_CHIP_ID_HIGH 0x26 +#define OV2680_CHIP_ID_LOW 0x80 + +#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_EXPOSURE_PK_MED 0x3501 +#define OV2680_REG_EXPOSURE_PK_LOW 0x3502 +#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 + +enum ov2680_frame_rate { + OV2680_30_FPS, + OV2680_FRAMERATES_MAX, +}; + +static const int ov2680_framerates[] = { + [OV2680_30_FPS] = 30, +}; + +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; +}; + +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 v4l2_fwnode_endpoint ep; + struct clk *xvclk; + u32 xvclk_freq; + + struct gpio_desc *pwdn_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; + + enum ov2680_frame_rate current_fps; + const struct ov2680_mode_info *current_mode; +}; + +static const char * const test_pattern_menu[] = { + "Disabled", + "Color bars", + "Random Data", + "Square", + "Black Image", +}; + +static const struct reg_value ov2680_init_settings[] = { + {0x3002, 0x00}, {0x3016, 0x1c}, {0x3082, 0x45}, {0x350b, 0x36}, + {0x3600, 0xb4}, {0x3603, 0x39}, {0x3604, 0x24}, {0x3605, 0x00}, + {0x3620, 0x26}, {0x3621, 0x37}, {0x3622, 0x04}, {0x3628, 0x00}, + {0x3701, 0x64}, {0x3784, 0x0c}, {0x3705, 0x3c}, {0x370c, 0x50}, + {0x370d, 0xc0}, {0x3718, 0x88}, {0x3720, 0x00}, {0x3721, 0x00}, + {0x3722, 0x00}, {0x3723, 0x00}, {0x3738, 0x00}, {0x3717, 0x58}, + {0x3781, 0x80}, {0x3789, 0x60}, {0x4000, 0x81}, {0x4602, 0x02}, + {0x481f, 0x36}, {0x4825, 0x36}, {0x5000, 0x3f}, {0x5002, 0x30}, + {0x5780, 0x3e}, {0x5788, 0x02}, {0x578e, 0x08}, {0x578f, 0x0c}, + {0x5792, 0x00}, +}; + +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}, {0x370a, 0x23}, {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, 0x01}, {0x370a, 0x23}, {0x3808, 0x06}, {0x3809, 0x40}, + {0x380a, 0x04}, {0x380b, 0xb0}, {0x380c, 0x06}, {0x380d, 0xac}, + {0x380e, 0x05}, {0x380f, 0x0e}, {0x3811, 0x00}, {0x3813, 0x00}, + {0x3814, 0x11}, {0x3815, 0x11}, {0x3820, 0xc0}, {0x4008, 0x00}, + {0x3501, 0x4e}, {0x3502, 0xe0}, +}; + +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_FRAMERATES_MAX][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, u8 val) +{ + struct i2c_client *client = sensor->i2c_client; + struct i2c_msg msg; + u8 buf[3]; + int ret; + + buf[0] = reg >> 8; + buf[1] = reg & 0xff; + buf[2] = val; + + msg.addr = client->addr; + msg.flags = client->flags; + msg.buf = buf; + msg.len = sizeof(buf); + + ret = i2c_transfer(client->adapter, &msg, 1); + if (ret < 0) { + dev_err(&client->dev, "write error: reg=0x%4x: %d\n", reg, ret); + return ret; + } + + return 0; +} + +static int ov2680_write_reg16(struct ov2680_dev *sensor, u16 reg, u16 val) +{ + int ret; + + ret = ov2680_write_reg(sensor, reg, val >> 8); + if (ret) + return ret; + + return ov2680_write_reg(sensor, reg + 1, val & 0xff); +} + +static int ov2680_read_reg(struct ov2680_dev *sensor, u16 reg, u8 *val) +{ + struct i2c_client *client = sensor->i2c_client; + struct i2c_msg msg[2]; + u8 buf[2]; + int ret; + + buf[0] = reg >> 8; + buf[1] = reg & 0xff; + + msg[0].addr = client->addr; + msg[0].flags = client->flags; + msg[0].buf = buf; + msg[0].len = sizeof(buf); + + msg[1].addr = client->addr; + msg[1].flags = client->flags | I2C_M_RD; + msg[1].buf = buf; + msg[1].len = 1; + + ret = i2c_transfer(client->adapter, msg, 2); + if (ret < 0) { + dev_err(&client->dev, "read error: reg=0x%4x: %d\n", reg, ret); + return ret; + } + + *val = buf[0]; + return 0; +} + +static int ov2680_read_reg16(struct ov2680_dev *sensor, u16 reg, u16 *val) +{ + u8 hi, lo; + int ret; + + ret = ov2680_read_reg(sensor, reg, &hi); + if (ret) + return ret; + ret = ov2680_read_reg(sensor, reg + 1, &lo); + if (ret) + return ret; + + *val = ((u16)hi << 8) | (u16)lo; + + return 0; +} + +static int ov2680_mod_reg(struct ov2680_dev *sensor, u16 reg, u8 mask, u8 val) +{ + u8 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->pwdn_gpio) + return; + + gpiod_set_value(sensor->pwdn_gpio, 1); + usleep_range(5000, 10000); +} + +static void ov2680_power_down(struct ov2680_dev *sensor) +{ + if (!sensor->pwdn_gpio) + return; + + gpiod_set_value(sensor->pwdn_gpio, 0); + usleep_range(5000, 10000); +} + +static int ov2680_soft_reset(struct ov2680_dev *sensor) +{ + struct device *dev = ov2680_to_dev(sensor); + int ret; + + 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); + return 0; +} + +static void ov2680_reset(struct ov2680_dev *sensor) +{ + if (!sensor->pwdn_gpio) { + ov2680_soft_reset(sensor); + return; + } + + ov2680_power_down(sensor); + ov2680_power_up(sensor); +} + +static int ov2680_vflip_enable(struct ov2680_dev *sensor) +{ + return ov2680_mod_reg(sensor, OV2680_REG_FORMAT1, BIT(2), BIT(2)); +} + +static int ov2680_vflip_disable(struct ov2680_dev *sensor) +{ + return ov2680_mod_reg(sensor, OV2680_REG_FORMAT1, BIT(2), 0); +} + +static int ov2680_hflip_enable(struct ov2680_dev *sensor) +{ + return ov2680_mod_reg(sensor, OV2680_REG_FORMAT2, BIT(2), BIT(2)); +} + +static int ov2680_hflip_disable(struct ov2680_dev *sensor) +{ + return ov2680_mod_reg(sensor, OV2680_REG_FORMAT2, BIT(2), 0); +} + +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; + u16 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) + return 0; + + gain = (u16)ctrls->gain->val; + + ret = ov2680_write_reg16(sensor, OV2680_REG_GAIN_PK, gain & 0x7ff); + + return 0; +} + +static int ov2680_gain_get(struct ov2680_dev *sensor) +{ + u16 gain; + int ret; + + ret = ov2680_read_reg16(sensor, OV2680_REG_GAIN_PK, &gain); + if (ret) + return ret; + + return gain & 0x3ff; +} + +static int ov2680_auto_gain_enable(struct ov2680_dev *sensor) +{ + return ov2680_gain_set(sensor, true); +} + +static int ov2680_auto_gain_disable(struct ov2680_dev *sensor) +{ + return ov2680_gain_set(sensor, false); +} + +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) + return 0; + + exp = (u32)ctrls->exposure->val; + exp <<= 4; + + ret = ov2680_write_reg(sensor, OV2680_REG_EXPOSURE_PK_LOW, + (exp << 4) & 0xf0); + if (ret) + return ret; + + ret = ov2680_write_reg(sensor, OV2680_REG_EXPOSURE_PK_MED, + (exp >> 4) & 0xff); + if (ret) + return ret; + + return ov2680_write_reg(sensor, OV2680_REG_EXPOSURE_PK_HIGH, + (exp >> 12) & 0x0f); +} + +static int ov2680_exposure_get(struct ov2680_dev *sensor) +{ + int exp, ret; + u8 temp; + + ret = ov2680_read_reg(sensor, OV2680_REG_EXPOSURE_PK_HIGH, &temp); + if (ret) + return ret; + exp = ((int)temp & 0x0f) << 12; + + ret = ov2680_read_reg(sensor, OV2680_REG_EXPOSURE_PK_MED, &temp); + if (ret) + return ret; + exp |= ((int)temp << 4); + + ret = ov2680_read_reg(sensor, OV2680_REG_EXPOSURE_PK_LOW, &temp); + if (ret) + return ret; + exp |= ((int)temp & 0xf0) >> 4; + + return exp; +} + +static int ov2680_auto_exposure_enable(struct ov2680_dev *sensor) +{ + return ov2680_exposure_set(sensor, true); +} + +static int ov2680_auto_exposure_disable(struct ov2680_dev *sensor) +{ + return ov2680_exposure_set(sensor, false); +} + +static int ov2680_mode_set_direct(struct ov2680_dev *sensor) +{ + int ret; + + if (!sensor->current_mode->reg_data) + return -EINVAL; + + ret = ov2680_load_regs(sensor, sensor->current_mode); + if (ret < 0) + return ret; + + return 0; +} + +static int ov2680_mode_set(struct ov2680_dev *sensor) +{ + u32 wait4stable_ms; + int ret; + + ret = ov2680_auto_gain_disable(sensor); + if (ret < 0) + return ret; + + ret = ov2680_auto_exposure_disable(sensor); + if (ret < 0) + return ret; + + ret = ov2680_mode_set_direct(sensor); + if (ret < 0) + return ret; + + ret = ov2680_auto_gain_enable(sensor); + if (ret < 0) + return ret; + + ret = ov2680_auto_exposure_enable(sensor); + if (ret < 0) + return ret; + + if (sensor->current_mode->id == OV2680_MODE_UXGA_1600_1200) + wait4stable_ms = 267; + else + wait4stable_ms = 600; + + msleep(wait4stable_ms); + + 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 0; +} + +static int ov2680_disable(struct ov2680_dev *sensor) +{ + if (!sensor->is_enabled) + return 0; + + clk_disable_unprepare(sensor->xvclk); + ov2680_power_down(sensor); + sensor->is_enabled = false; + + return 0; +} + +static int ov2680_enable(struct ov2680_dev *sensor) +{ + struct device *dev = ov2680_to_dev(sensor); + int ret; + + if (sensor->is_enabled) + return 0; + + ov2680_reset(sensor); + + ret = clk_prepare_enable(sensor->xvclk); + if (ret < 0) + return ret; + + ret = ov2680_mode_restore(sensor); + if (ret < 0) + goto disable; + + sensor->is_enabled = true; + return 0; + +disable: + dev_err(dev, "failed to enable sensor: %d\n", ret); + ov2680_disable(sensor); + + return ret; +} + +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_enable(sensor); + else + ret = ov2680_disable(sensor); + + mutex_unlock(&sensor->lock); + + if (on && ret == 0) { + ret = v4l2_ctrl_handler_setup(&sensor->ctrls.handler); + if (ret < 0) + return ret; + } + + return ret; +} + +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_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_frame_interval(struct v4l2_subdev *sd, + struct v4l2_subdev_frame_interval *fi) +{ + 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; + + if (format->pad != 0) + return -EINVAL; + + mutex_lock(&sensor->lock); + + if (format->which == V4L2_SUBDEV_FORMAT_TRY) + fmt = v4l2_subdev_get_try_format(&sensor->sd, cfg, format->pad); + else + fmt = &sensor->fmt; + + format->format = *fmt; + + mutex_unlock(&sensor->lock); + + return 0; +} + +static const struct ov2680_mode_info * +ov2680_mode_find(struct ov2680_dev *sensor, enum ov2680_frame_rate fps, + int width, int height) +{ + const struct ov2680_mode_info *mode = NULL; + bool mode_found = false; + int i; + + for (i = OV2680_MODE_MAX - 1; i >= 0; i--) { + mode = &ov2680_mode_data[fps][i]; + + if (!mode->reg_data) + continue; + + if (mode->width == width && mode->height == height) { + mode_found = true; + break; + } + } + + return mode_found ? mode : NULL; +} + +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; + 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 = ov2680_mode_find(sensor, sensor->current_fps, fmt->width, + fmt->height); + if (!mode) { + ret = -EINVAL; + goto unlock; + } + + if (format->which == V4L2_SUBDEV_FORMAT_TRY) { + fmt = v4l2_subdev_get_try_format(sd, cfg, 0); + + *fmt = format->format; + } + + 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_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) + return -EINVAL; + + fse->min_width = ov2680_mode_data[0][index].width; + fse->min_height = ov2680_mode_data[0][index].height; + fse->max_width = ov2680_mode_data[0][index].width; + fse->max_height = ov2680_mode_data[0][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 ov2680_dev *sensor = to_ov2680_dev(sd); + const struct ov2680_mode_info *mode; + struct v4l2_fract tpf; + + if (fie->index >= OV2680_FRAMERATES_MAX) + return -EINVAL; + + tpf.denominator = ov2680_framerates[fie->index]; + tpf.numerator = 1; + + fie->interval = tpf; + + mode = ov2680_mode_find(sensor, sensor->current_fps, fie->width, + fie->height); + + return mode ? 0 : -EINVAL; +} + +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); + int val; + + switch (ctrl->id) { + case V4L2_CID_AUTOGAIN: + if (!ctrl->val) + return 0; + val = ov2680_gain_get(sensor); + if (val < 0) + return val; + sensor->ctrls.gain->val = val; + break; + case V4L2_CID_EXPOSURE_AUTO: + if (ctrl->val == V4L2_EXPOSURE_MANUAL) + return 0; + val = ov2680_exposure_get(sensor); + if (val < 0) + return val; + sensor->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); + + if (!sensor->is_enabled) + return 0; + + switch (ctrl->id) { + case V4L2_CID_AUTOGAIN: + return ov2680_gain_set(sensor, !!ctrl->val); + case V4L2_CID_EXPOSURE_AUTO: + return ov2680_exposure_set(sensor, !!ctrl->val); + case V4L2_CID_VFLIP: + if (ctrl->val) + return ov2680_vflip_enable(sensor); + else + return ov2680_vflip_disable(sensor); + case V4L2_CID_HFLIP: + 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_g_frame_interval, + .s_frame_interval = ov2680_s_frame_interval, + .s_stream = ov2680_s_stream, +}; + +static const struct v4l2_subdev_pad_ops ov2680_pad_ops = { + .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_framerates[OV2680_30_FPS]; + sensor->frame_interval.numerator = 1; + + sensor->current_fps = OV2680_30_FPS; + init_mode = &ov2680_mode_data[OV2680_30_FPS][OV2680_MODE_QUXGA_800_600]; + + sensor->current_mode = init_mode; + + sensor->mode_pending_changes = true; + + return 0; +} + +static int ov2680_v4l2_init(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); + + sensor->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE; + 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, 32); + + 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); + + 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) { + media_entity_cleanup(&sensor->sd.entity); + v4l2_ctrl_handler_free(hdl); + } + + return ret; +} + +static int ov2680_check_id(struct ov2680_dev *sensor) +{ + struct device *dev = ov2680_to_dev(sensor); + u8 chip_id_high; + u8 chip_id_low; + int ret; + + ov2680_reset(sensor); + + ret = ov2680_read_reg(sensor, OV2680_REG_CHIP_ID_HIGH, &chip_id_high); + if (ret < 0) { + dev_err(dev, "failed to read chip id high\n"); + return -ENODEV; + } + + ret = ov2680_read_reg(sensor, OV2680_REG_CHIP_ID_LOW, &chip_id_low); + if (ret < 0) { + dev_err(dev, "failed to read chip id low\n"); + return -ENODEV; + } + + if (chip_id_high != OV2680_CHIP_ID_HIGH || + chip_id_low != OV2680_CHIP_ID_LOW) { + dev_err(dev, "chip id: 0x%02x%02x does not match expected: 0x%02x%02x\n", + chip_id_high, chip_id_low, OV2680_CHIP_ID_HIGH, + OV2680_CHIP_ID_LOW); + return -ENODEV; + } + + return 0; +} + +static int ov2860_parse_dt(struct ov2680_dev *sensor) +{ + struct device *dev = ov2680_to_dev(sensor); + int ret; + + sensor->pwdn_gpio = devm_gpiod_get_optional(dev, "powerdown", + GPIOD_OUT_HIGH); + ret = PTR_ERR_OR_ZERO(sensor->pwdn_gpio); + if (ret < 0) { + dev_dbg(dev, "error while getting powerdown 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_MIN || + sensor->xvclk_freq > OV2680_XVCLK_MAX) { + dev_err(dev, "xvclk frequency out of range: %d Hz\n", + sensor->xvclk_freq); + return -EINVAL; + } + + return 0; +} + +static int ov2680_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + 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_check_id(sensor); + if (ret < 0) + return ret; + + ret = ov2680_mode_init(sensor); + if (ret < 0) + return ret; + + mutex_init(&sensor->lock); + + ret = ov2680_v4l2_init(sensor); + if (ret < 0) + goto lock_destroy; + + dev_info(dev, "ov2680 init correctly\n"); + + return 0; + +lock_destroy: + 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 i2c_device_id ov2680_id[] = { + {"ov2680", 0}, + { }, +}; +MODULE_DEVICE_TABLE(i2c, ov2680_id); + +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 = "ovti,ov2680", + .of_match_table = ov2680_dt_ids, + }, + .id_table = ov2680_id, + .probe = ov2680_probe, + .remove = ov2680_remove, +}; +module_i2c_driver(ov2680_i2c_driver); + +MODULE_AUTHOR("Rui Miguel Silva "); +MODULE_DESCRIPTION("OV2680 CMOS Image Sensor driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3