From: Dongchun Zhu <dongchun....@mediatek.com> This patch adds a V4L2 sub-device driver for OV02A10 image sensor. The OV02A10 is a 1/5" CMOS sensor from Omnivision, which supports output format: 10-bit Raw. The OV02A10 has a single MIPI lane interface and use the I2C bus for control and the CSI-2 bus for data.
Signed-off-by: Dongchun Zhu <dongchun....@mediatek.com> --- MAINTAINERS | 1 + drivers/media/i2c/Kconfig | 11 + drivers/media/i2c/Makefile | 1 + drivers/media/i2c/ov02a10.c | 1018 +++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 1031 insertions(+) create mode 100644 drivers/media/i2c/ov02a10.c diff --git a/MAINTAINERS b/MAINTAINERS index 41734fb..4b714a2 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11821,6 +11821,7 @@ M: Dongchun Zhu <dongchun....@mediatek.com> L: linux-media@vger.kernel.org T: git git://linuxtv.org/media_tree.git S: Maintained +F: drivers/media/i2c/ov02a10.c F: Documentation/devicetree/bindings/media/i2c/ov02a10.txt OMNIVISION OV2680 SENSOR DRIVER diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 79ce9ec..d063a82 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -617,6 +617,17 @@ config VIDEO_IMX355 To compile this driver as a module, choose M here: the module will be called imx355. +config VIDEO_OV02A10 + tristate "OmniVision OV02A10 sensor support" + depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API + depends on MEDIA_CAMERA_SUPPORT + help + This is a Video4Linux2 sensor driver for the OmniVision + OV02A10 camera. + + To compile this driver as a module, choose M here: the + module will be called ov02a10. + config VIDEO_OV2640 tristate "OmniVision OV2640 sensor support" depends on VIDEO_V4L2 && I2C diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile index fd4ea86..f34a7ac 100644 --- a/drivers/media/i2c/Makefile +++ b/drivers/media/i2c/Makefile @@ -71,6 +71,7 @@ obj-$(CONFIG_VIDEO_OV5645) += ov5645.o obj-$(CONFIG_VIDEO_OV5647) += ov5647.o obj-$(CONFIG_VIDEO_OV5670) += ov5670.o obj-$(CONFIG_VIDEO_OV5695) += ov5695.o +obj-$(CONFIG_VIDEO_OV02A10) += ov02a10.o obj-$(CONFIG_VIDEO_OV6650) += ov6650.o obj-$(CONFIG_VIDEO_OV7251) += ov7251.o obj-$(CONFIG_VIDEO_OV7640) += ov7640.o diff --git a/drivers/media/i2c/ov02a10.c b/drivers/media/i2c/ov02a10.c new file mode 100644 index 0000000..ff5460a --- /dev/null +++ b/drivers/media/i2c/ov02a10.c @@ -0,0 +1,1018 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2018 MediaTek Inc. + */ + +#include <linux/clk.h> +#include <linux/device.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/pm_runtime.h> +#include <linux/regulator/consumer.h> +#include <media/media-entity.h> +#include <media/v4l2-async.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-subdev.h> + +#define CHIP_ID 0x2509 +#define OV02A10_REG_CHIP_ID_H 0x02 +#define OV02A10_REG_CHIP_ID_L 0x03 +#define OV02A10_ID(_msb, _lsb) ((_msb) << 8 | (_lsb)) + +/* Bit[1] vertical upside down */ +/* Bit[0] horizontal mirror */ +#define REG_MIRROR_FLIP_CONTROL 0x3f + +/* Orientation */ +#define REG_CONFIG_MIRROR_FLIP 0x03 + +#define REG_PAGE_SWITCH 0xfd +#define REG_GLOBAL_EFFECTIVE 0x01 +#define REG_ENABLE BIT(0) + +#define REG_SC_CTRL_MODE 0xac +#define SC_CTRL_MODE_STANDBY 0x00 +#define SC_CTRL_MODE_STREAMING 0x01 + +#define OV02A10_REG_EXPOSURE_H 0x03 +#define OV02A10_REG_EXPOSURE_L 0x04 +#define OV02A10_EXPOSURE_MIN 4 +#define OV02A10_EXPOSURE_STEP 1 + +#define OV02A10_REG_VTS_H 0x05 +#define OV02A10_REG_VTS_L 0x06 +#define OV02A10_VTS_MAX 0x209f +#define OV02A10_VTS_MIN 0x04cf +#define OV02A10_BASIC_LINE 1224 + +#define OV02A10_REG_GAIN 0x24 +#define OV02A10_GAIN_MIN 0x10 +#define OV02A10_GAIN_MAX 0xf8 +#define OV02A10_GAIN_STEP 0x01 +#define OV02A10_GAIN_DEFAULT 0x40 + +#define REG_NULL 0xff + +#define OV02A10_LANES 1 +#define OV02A10_BITS_PER_SAMPLE 10 + +static const char * const ov02a10_supply_names[] = { + "dovdd", /* Digital I/O power */ + "avdd", /* Analog power */ + "dvdd", /* Digital core power */ +}; + +#define OV02A10_NUM_SUPPLIES ARRAY_SIZE(ov02a10_supply_names) + +struct regval { + u16 addr; + u8 val; +}; + +struct ov02a10_mode { + u32 width; + u32 height; + u32 exp_def; + u32 hts_def; + u32 vts_def; + const struct regval *reg_list; +}; + +struct ov02a10 { + struct clk *xvclk; + struct gpio_desc *powerdown_gpio; + struct gpio_desc *reset_gpio; + struct regulator_bulk_data supplies[OV02A10_NUM_SUPPLIES]; + + bool streaming; + bool upside_down; + + /* + * Serialize control access, get/set format, get selection + * and start streaming. + */ + struct mutex mutex; + struct v4l2_subdev subdev; + struct media_pad pad; + struct v4l2_ctrl *anal_gain; + struct v4l2_ctrl *exposure; + struct v4l2_ctrl *hblank; + struct v4l2_ctrl *vblank; + struct v4l2_ctrl *hflip; + struct v4l2_ctrl *vflip; + struct v4l2_ctrl *test_pattern; + struct v4l2_mbus_framefmt fmt; + struct v4l2_ctrl_handler ctrl_handler; + + const struct ov02a10_mode *cur_mode; +}; + +#define to_ov02a10(sd) container_of(sd, struct ov02a10, subdev) + +static inline void msleep_range(unsigned int delay_base) +{ + usleep_range(delay_base * 1000, delay_base * 1000 + 500); +} + +/* MIPI color bar enable output */ +static const struct regval ov02a10_test_pattern_enable_regs[] = { + {0xfd, 0x01}, + {0x0d, 0x00}, + {0xb6, 0x01}, + {0x01, 0x01}, + {0xfd, 0x01}, + {0xac, 0x01}, + {REG_NULL, 0x00} +}; + +/* MIPI color bar disable output */ +static const struct regval ov02a10_test_pattern_disable_regs[] = { + {0xfd, 0x01}, + {0x0d, 0x00}, + {0xb6, 0x00}, + {0x01, 0x01}, + {0xfd, 0x01}, + {0xac, 0x01}, + {REG_NULL, 0x00} +}; + +/* + * xvclk 24Mhz + * pclk 39Mhz + * linelength 934(0x3a6) + * framelength 1390(0x56e) + * grabwindow_width 1600 + * grabwindow_height 1200 + * max_framerate 30fps + * mipi_datarate per lane 780Mbps + */ +static const struct regval ov02a10_1600x1200_regs[] = { + {0xfd, 0x01}, + {0xac, 0x00}, + {0xfd, 0x00}, + {0x2f, 0x29}, + {0x34, 0x00}, + {0x35, 0x21}, + {0x30, 0x15}, + {0x33, 0x01}, + {0xfd, 0x01}, + {0x44, 0x00}, + {0x2a, 0x4c}, + {0x2b, 0x1e}, + {0x2c, 0x60}, + {0x25, 0x11}, + {0x03, 0x01}, + {0x04, 0xae}, + {0x09, 0x00}, + {0x0a, 0x02}, + {0x06, 0xa6}, + {0x31, 0x00}, + {0x24, 0x40}, + {0x01, 0x01}, + {0xfb, 0x73}, + {0xfd, 0x01}, + {0x16, 0x04}, + {0x1c, 0x09}, + {0x21, 0x42}, + {0x12, 0x04}, + {0x13, 0x10}, + {0x11, 0x40}, + {0x33, 0x81}, + {0xd0, 0x00}, + {0xd1, 0x01}, + {0xd2, 0x00}, + {0x50, 0x10}, + {0x51, 0x23}, + {0x52, 0x20}, + {0x53, 0x10}, + {0x54, 0x02}, + {0x55, 0x20}, + {0x56, 0x02}, + {0x58, 0x48}, + {0x5d, 0x15}, + {0x5e, 0x05}, + {0x66, 0x66}, + {0x68, 0x68}, + {0x6b, 0x00}, + {0x6c, 0x00}, + {0x6f, 0x40}, + {0x70, 0x40}, + {0x71, 0x0a}, + {0x72, 0xf0}, + {0x73, 0x10}, + {0x75, 0x80}, + {0x76, 0x10}, + {0x84, 0x00}, + {0x85, 0x10}, + {0x86, 0x10}, + {0x87, 0x00}, + {0x8a, 0x22}, + {0x8b, 0x22}, + {0x19, 0xf1}, + {0x29, 0x01}, + {0xfd, 0x01}, + {0x9d, 0xd6}, + {0xa0, 0x29}, + {0xa1, 0x03}, + {0xad, 0x62}, + {0xae, 0x00}, + {0xaf, 0x85}, + {0xb1, 0x01}, + {0x8e, 0x06}, + {0x8f, 0x40}, + {0x90, 0x04}, + {0x91, 0xb0}, + {0x45, 0x01}, + {0x46, 0x00}, + {0x47, 0x6c}, + {0x48, 0x03}, + {0x49, 0x8b}, + {0x4a, 0x00}, + {0x4b, 0x07}, + {0x4c, 0x04}, + {0x4d, 0xb7}, + {0xf0, 0x40}, + {0xf1, 0x40}, + {0xf2, 0x40}, + {0xf3, 0x40}, + {0x3f, 0x00}, + {0xfd, 0x01}, + {0x05, 0x00}, + {0x06, 0xa6}, + {0xfd, 0x01}, + {REG_NULL, 0x00} +}; + +#define OV02A10_LINK_FREQ_390MHZ 390000000 +static const s64 link_freq_menu_items[] = { + OV02A10_LINK_FREQ_390MHZ +}; + +static const char * const ov02a10_test_pattern_menu[] = { + "Disabled", + "Color Bar", +}; + +static const struct ov02a10_mode supported_modes[] = { + { + .width = 1600, + .height = 1200, + .exp_def = 0x01ae, + .hts_def = 0x03a6, + .vts_def = 0x056e, + .reg_list = ov02a10_1600x1200_regs, + }, +}; + +/* Write a register */ +static int ov02a10_write_reg(struct ov02a10 *ov02a10, u8 addr, u8 val) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + u8 buf[2] = {addr, val}; + int ret; + + ret = i2c_master_send(client, buf, 2); + + if (ret != 2) { + dev_err(&client->dev, "%s: error: reg=%x, val=%x\n", + __func__, addr, val); + return -EIO; + } + + return 0; +} + +static int ov02a10_write_array(struct ov02a10 *ov02a10, + const struct regval *regs) +{ + u32 i; + int ret; + + for (i = 0; regs[i].addr != REG_NULL; i++) { + ret = ov02a10_write_reg(ov02a10, regs[i].addr, regs[i].val); + if (ret < 0) + return ret; + } + + return 0; +} + +/* Read a register */ +static int ov02a10_read_reg(struct ov02a10 *ov02a10, u8 reg, u8 *val) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + u8 data = reg; + struct i2c_msg msg = { + .addr = client->addr, + .flags = 0, + .len = 1, + .buf = &data, + }; + int ret; + + ret = i2c_transfer(client->adapter, &msg, 1); + if (ret < 0) + goto err_wr; + + msg.flags = I2C_M_RD; + ret = i2c_transfer(client->adapter, &msg, 1); + if (ret < 0) + goto err_rd; + + *val = data; + return 0; + +err_rd: + dev_err(&client->dev, "i2c_transfer --I2C_M_RD failed\n"); +err_wr: + dev_err(&client->dev, "read error: reg=0x%02x: %d\n", reg, ret); + return ret; +} + +static void ov02a10_fill_fmt(const struct ov02a10_mode *mode, + struct v4l2_mbus_framefmt *fmt) +{ + fmt->width = mode->width; + fmt->height = mode->height; + fmt->field = V4L2_FIELD_NONE; +} + +static int ov02a10_set_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *fmt) +{ + struct ov02a10 *ov02a10 = to_ov02a10(sd); + struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format; + + mutex_lock(&ov02a10->mutex); + + if (ov02a10->streaming) { + mutex_unlock(&ov02a10->mutex); + return -EBUSY; + } + + /* Only one sensor mode supported */ + mbus_fmt->code = ov02a10->fmt.code; + ov02a10_fill_fmt(ov02a10->cur_mode, mbus_fmt); + ov02a10->fmt = fmt->format; + + mutex_unlock(&ov02a10->mutex); + + return 0; +} + +static int ov02a10_get_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *fmt) +{ + struct ov02a10 *ov02a10 = to_ov02a10(sd); + struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format; + + mutex_lock(&ov02a10->mutex); + + fmt->format = ov02a10->fmt; + mbus_fmt->code = ov02a10->fmt.code; + ov02a10_fill_fmt(ov02a10->cur_mode, mbus_fmt); + + mutex_unlock(&ov02a10->mutex); + + return 0; +} + +static int ov02a10_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_mbus_code_enum *code) +{ + struct ov02a10 *ov02a10 = to_ov02a10(sd); + + if (code->index >= ARRAY_SIZE(supported_modes) || !(code->index)) + return -EINVAL; + + code->code = ov02a10->fmt.code; + + return 0; +} + +static int ov02a10_enum_frame_sizes(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_frame_size_enum *fse) +{ + if (fse->index >= ARRAY_SIZE(supported_modes) || !(fse->index)) + return -EINVAL; + + fse->min_width = supported_modes[fse->index].width; + fse->max_width = supported_modes[fse->index].width; + fse->max_height = supported_modes[fse->index].height; + fse->min_height = supported_modes[fse->index].height; + + return 0; +} + +static int __ov02a10_power_on(struct ov02a10 *ov02a10) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + struct device *dev = &client->dev; + int ret; + + ret = clk_prepare_enable(ov02a10->xvclk); + if (ret < 0) { + dev_err(dev, "Failed to enable xvclk\n"); + return ret; + } + + /* Note: set 0 is high, set 1 is low */ + gpiod_set_value_cansleep(ov02a10->reset_gpio, 1); + gpiod_set_value_cansleep(ov02a10->powerdown_gpio, 0); + + ret = regulator_bulk_enable(OV02A10_NUM_SUPPLIES, ov02a10->supplies); + if (ret < 0) { + dev_err(dev, "Failed to enable regulators\n"); + goto disable_clk; + } + msleep_range(7); + + gpiod_set_value_cansleep(ov02a10->powerdown_gpio, 1); + msleep_range(10); + + gpiod_set_value_cansleep(ov02a10->reset_gpio, 0); + msleep_range(10); + + return 0; + +disable_clk: + clk_disable_unprepare(ov02a10->xvclk); + + return ret; +} + +static void __ov02a10_power_off(struct ov02a10 *ov02a10) +{ + clk_disable_unprepare(ov02a10->xvclk); + gpiod_set_value_cansleep(ov02a10->reset_gpio, 1); + gpiod_set_value_cansleep(ov02a10->powerdown_gpio, 1); + regulator_bulk_disable(OV02A10_NUM_SUPPLIES, ov02a10->supplies); +} + +static int __ov02a10_start_stream(struct ov02a10 *ov02a10) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + int ret; + + /* Apply default values of current mode */ + ret = ov02a10_write_array(ov02a10, ov02a10->cur_mode->reg_list); + if (ret) + return ret; + + /* Apply customized values from user */ + ret = __v4l2_ctrl_handler_setup(ov02a10->subdev.ctrl_handler); + if (ret) + return ret; + + /* Set orientation to 180 degree */ + if (ov02a10->upside_down) { + ret = ov02a10_write_reg(ov02a10, REG_MIRROR_FLIP_CONTROL, + REG_CONFIG_MIRROR_FLIP); + if (ret) { + dev_err(&client->dev, "%s failed to set orientation\n", + __func__); + return ret; + } + ret = ov02a10_write_reg(ov02a10, REG_GLOBAL_EFFECTIVE, + REG_ENABLE); + if (ret < 0) + return ret; + } + + /* Set stream on register */ + return ov02a10_write_reg(ov02a10, + REG_SC_CTRL_MODE, SC_CTRL_MODE_STREAMING); +} + +static int __ov02a10_stop_stream(struct ov02a10 *ov02a10) +{ + return ov02a10_write_reg(ov02a10, + REG_SC_CTRL_MODE, SC_CTRL_MODE_STANDBY); +} + +static int ov02a10_entity_init_cfg(struct v4l2_subdev *subdev, + struct v4l2_subdev_pad_config *cfg) +{ + struct v4l2_subdev_format fmt = { 0 }; + + fmt.which = cfg ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; + fmt.format.width = 1600; + fmt.format.height = 1200; + + ov02a10_set_fmt(subdev, cfg, &fmt); + + return 0; +} + +static int ov02a10_s_stream(struct v4l2_subdev *sd, int on) +{ + struct ov02a10 *ov02a10 = to_ov02a10(sd); + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + int ret = 0; + + mutex_lock(&ov02a10->mutex); + + if (ov02a10->streaming == on) + goto unlock_and_return; + + if (on) { + ret = pm_runtime_get_sync(&client->dev); + if (ret < 0) { + pm_runtime_put_noidle(&client->dev); + goto unlock_and_return; + } + + ret = __ov02a10_start_stream(ov02a10); + if (ret) { + __ov02a10_stop_stream(ov02a10); + ov02a10->streaming = !on; + goto err_rpm_put; + } + } else { + __ov02a10_stop_stream(ov02a10); + pm_runtime_put(&client->dev); + } + + ov02a10->streaming = on; + mutex_unlock(&ov02a10->mutex); + + return ret; + +err_rpm_put: + pm_runtime_put(&client->dev); +unlock_and_return: + mutex_unlock(&ov02a10->mutex); + + return ret; +} + +static int ov02a10_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + struct ov02a10 *ov02a10 = to_ov02a10(sd); + struct v4l2_mbus_framefmt *try_fmt = v4l2_subdev_get_try_format(sd, + fh->pad, + 0); + + mutex_lock(&ov02a10->mutex); + /* Initialize try_fmt */ + try_fmt->code = ov02a10->fmt.code; + ov02a10_fill_fmt(&supported_modes[0], try_fmt); + + mutex_unlock(&ov02a10->mutex); + + return 0; +} + +static int __maybe_unused ov02a10_runtime_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov02a10 *ov02a10 = to_ov02a10(sd); + + return __ov02a10_power_on(ov02a10); +} + +static int __maybe_unused ov02a10_runtime_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov02a10 *ov02a10 = to_ov02a10(sd); + + __ov02a10_power_off(ov02a10); + + return 0; +} + +static const struct dev_pm_ops ov02a10_pm_ops = { + SET_RUNTIME_PM_OPS(ov02a10_runtime_suspend, + ov02a10_runtime_resume, NULL) +}; + +static int ov02a10_set_test_pattern(struct ov02a10 *ov02a10, s32 value) +{ + if (value) + return ov02a10_write_array(ov02a10, + ov02a10_test_pattern_enable_regs); + + return ov02a10_write_array(ov02a10, + ov02a10_test_pattern_disable_regs); +} + +static int ov02a10_set_ctrl(struct v4l2_ctrl *ctrl) +{ + struct ov02a10 *ov02a10 = container_of(ctrl->handler, + struct ov02a10, ctrl_handler); + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + s64 max_expo; + int ret; + + /* Propagate change of current control to all related controls */ + if (ctrl->id == V4L2_CID_VBLANK) { + /* Update max exposure while meeting expected vblanking */ + max_expo = ov02a10->cur_mode->height + ctrl->val - 4; + __v4l2_ctrl_modify_range(ov02a10->exposure, + ov02a10->exposure->minimum, max_expo, + ov02a10->exposure->step, + ov02a10->exposure->default_value); + } + + /* V4L2 controls values will be applied only when power is already up */ + if (!pm_runtime_get_if_in_use(&client->dev)) + return 0; + + switch (ctrl->id) { + case V4L2_CID_EXPOSURE: + ret = ov02a10_write_reg(ov02a10, REG_PAGE_SWITCH, REG_ENABLE); + if (ret < 0) + return ret; + ret = ov02a10_write_reg(ov02a10, OV02A10_REG_EXPOSURE_H, + ((ctrl->val >> 8) & 0xFF)); + if (!ret) { + ret = ov02a10_write_reg(ov02a10, OV02A10_REG_EXPOSURE_L, + (ctrl->val & 0xFF)); + if (ret < 0) + return ret; + } + ret = ov02a10_write_reg(ov02a10, REG_GLOBAL_EFFECTIVE, + REG_ENABLE); + if (ret < 0) + return ret; + break; + case V4L2_CID_ANALOGUE_GAIN: + ret = ov02a10_write_reg(ov02a10, REG_PAGE_SWITCH, REG_ENABLE); + if (ret < 0) + return ret; + ret = ov02a10_write_reg(ov02a10, OV02A10_REG_GAIN, + (ctrl->val & 0xFF)); + if (ret < 0) + return ret; + ret = ov02a10_write_reg(ov02a10, REG_GLOBAL_EFFECTIVE, + REG_ENABLE); + if (ret < 0) + return ret; + break; + case V4L2_CID_VBLANK: + ret = ov02a10_write_reg(ov02a10, REG_PAGE_SWITCH, REG_ENABLE); + if (ret < 0) + return ret; + ret = ov02a10_write_reg(ov02a10, OV02A10_REG_VTS_H, + (((ctrl->val + + ov02a10->cur_mode->height - + OV02A10_BASIC_LINE) >> 8) + & 0xFF)); + if (!ret) { + ret = ov02a10_write_reg(ov02a10, OV02A10_REG_VTS_L, + ((ctrl->val + + ov02a10->cur_mode->height - + OV02A10_BASIC_LINE) & 0xFF)); + if (ret < 0) + return ret; + } + ret = ov02a10_write_reg(ov02a10, REG_GLOBAL_EFFECTIVE, + REG_ENABLE); + if (ret < 0) + return ret; + break; + case V4L2_CID_TEST_PATTERN: + ret = ov02a10_set_test_pattern(ov02a10, ctrl->val); + if (ret < 0) + return ret; + break; + default: + dev_warn(&client->dev, "%s Unhandled id:0x%x, val:0x%x\n", + __func__, ctrl->id, ctrl->val); + ret = -EINVAL; + break; + }; + + pm_runtime_put(&client->dev); + + return ret; +} + +static const struct v4l2_subdev_video_ops ov02a10_video_ops = { + .s_stream = ov02a10_s_stream, +}; + +static const struct v4l2_subdev_pad_ops ov02a10_pad_ops = { + .init_cfg = ov02a10_entity_init_cfg, + .enum_mbus_code = ov02a10_enum_mbus_code, + .enum_frame_size = ov02a10_enum_frame_sizes, + .get_fmt = ov02a10_get_fmt, + .set_fmt = ov02a10_set_fmt, +}; + +static const struct v4l2_subdev_ops ov02a10_subdev_ops = { + .video = &ov02a10_video_ops, + .pad = &ov02a10_pad_ops, +}; + +static const struct media_entity_operations ov02a10_subdev_entity_ops = { + .link_validate = v4l2_subdev_link_validate, +}; + +static const struct v4l2_subdev_internal_ops ov02a10_internal_ops = { + .open = ov02a10_open, +}; + +static const struct v4l2_ctrl_ops ov02a10_ctrl_ops = { + .s_ctrl = ov02a10_set_ctrl, +}; + +static int ov02a10_initialize_controls(struct ov02a10 *ov02a10) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + const struct ov02a10_mode *mode; + struct v4l2_ctrl_handler *handler; + struct v4l2_ctrl *ctrl; + u64 exposure_max; + u32 pixel_rate, h_blank; + int ret; + + handler = &ov02a10->ctrl_handler; + mode = ov02a10->cur_mode; + ret = v4l2_ctrl_handler_init(handler, 10); + if (ret) + return ret; + handler->lock = &ov02a10->mutex; + + ctrl = v4l2_ctrl_new_int_menu(handler, NULL, V4L2_CID_LINK_FREQ, + 0, 0, link_freq_menu_items); + if (ctrl) + ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; + + pixel_rate = (link_freq_menu_items[0] * 2 * OV02A10_LANES) / + OV02A10_BITS_PER_SAMPLE; + v4l2_ctrl_new_std(handler, NULL, V4L2_CID_PIXEL_RATE, + 0, pixel_rate, 1, pixel_rate); + + h_blank = mode->hts_def - mode->width; + ov02a10->hblank = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK, + h_blank, h_blank, 1, h_blank); + if (ov02a10->hblank) + ov02a10->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; + + ov02a10->vblank = v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops, + V4L2_CID_VBLANK, mode->vts_def - + mode->height, + OV02A10_VTS_MAX - mode->height, 1, + mode->vts_def - mode->height); + + exposure_max = mode->vts_def - 4; + ov02a10->exposure = v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops, + V4L2_CID_EXPOSURE, + OV02A10_EXPOSURE_MIN, + exposure_max, + OV02A10_EXPOSURE_STEP, + mode->exp_def); + + ov02a10->anal_gain = v4l2_ctrl_new_std(handler, &ov02a10_ctrl_ops, + V4L2_CID_ANALOGUE_GAIN, + OV02A10_GAIN_MIN, + OV02A10_GAIN_MAX, + OV02A10_GAIN_STEP, + OV02A10_GAIN_DEFAULT); + + ov02a10->test_pattern = + v4l2_ctrl_new_std_menu_items(handler, + &ov02a10_ctrl_ops, + V4L2_CID_TEST_PATTERN, + ARRAY_SIZE(ov02a10_test_pattern_menu) - + 1, 0, 0, ov02a10_test_pattern_menu); + + if (handler->error) { + ret = handler->error; + dev_err(&client->dev, + "Failed to init controls(%d)\n", ret); + goto err_free_handler; + } + + ov02a10->subdev.ctrl_handler = handler; + + return 0; + +err_free_handler: + v4l2_ctrl_handler_free(handler); + + return ret; +} + +static int ov02a10_check_sensor_id(struct ov02a10 *ov02a10) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + u16 id; + u8 pid = 0; + u8 ver = 0; + int ret; + + /* Check sensor revision */ + ret = ov02a10_read_reg(ov02a10, OV02A10_REG_CHIP_ID_H, &pid); + if (ret) + return ret; + + ret = ov02a10_read_reg(ov02a10, OV02A10_REG_CHIP_ID_L, &ver); + if (ret) + return ret; + + id = OV02A10_ID(pid, ver); + if (id != CHIP_ID) { + dev_err(&client->dev, "Unexpected sensor id(%04x)\n", id); + return ret; + } + + dev_info(&client->dev, "Detected OV%04X sensor\n", id); + + return 0; +} + +static int ov02a10_configure_regulators(struct ov02a10 *ov02a10) +{ + struct i2c_client *client = v4l2_get_subdevdata(&ov02a10->subdev); + unsigned int i; + + for (i = 0; i < OV02A10_NUM_SUPPLIES; i++) + ov02a10->supplies[i].supply = ov02a10_supply_names[i]; + + return devm_regulator_bulk_get(&client->dev, + OV02A10_NUM_SUPPLIES, + ov02a10->supplies); +} + +static int ov02a10_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct ov02a10 *ov02a10; + u32 rotation; + u32 xclk_freq; + int ret; + + ov02a10 = devm_kzalloc(dev, sizeof(*ov02a10), GFP_KERNEL); + if (!ov02a10) + return -ENOMEM; + + v4l2_i2c_subdev_init(&ov02a10->subdev, client, &ov02a10_subdev_ops); + ov02a10->fmt.code = MEDIA_BUS_FMT_SBGGR10_1X10; + + /* Optional indication of physical rotation of sensor */ + ret = fwnode_property_read_u32(dev_fwnode(dev), "rotation", + &rotation); + if (!ret) { + switch (rotation) { + case 180: + ov02a10->upside_down = true; + ov02a10->fmt.code = MEDIA_BUS_FMT_SRGGB10_1X10; + break; + case 0: + break; + default: + dev_warn(dev, "%u degrees rotation is not supported, ignoring...\n", + rotation); + } + } + + /* Get system clock (xvclk) */ + ov02a10->xvclk = devm_clk_get(dev, "xvclk"); + if (IS_ERR(ov02a10->xvclk)) { + dev_err(dev, "Failed to get xvclk\n"); + return -EINVAL; + } + + ret = of_property_read_u32(dev->of_node, "clock-frequency", &xclk_freq); + if (ret) { + dev_err(dev, "Failed to get xclk frequency\n"); + return ret; + } + + /* External clock must be 24MHz, allow 1% tolerance */ + if (xclk_freq < 23760000 || xclk_freq > 24240000) { + dev_err(dev, "external clock frequency %u is not supported\n", + xclk_freq); + return -EINVAL; + } + dev_dbg(dev, "external clock frequency %u\n", xclk_freq); + + ret = clk_set_rate(ov02a10->xvclk, xclk_freq); + if (ret) { + dev_err(dev, "Failed to set xvclk frequency (24MHz)\n"); + return ret; + } + + ov02a10->powerdown_gpio = devm_gpiod_get(dev, "powerdown", + GPIOD_OUT_LOW); + if (IS_ERR(ov02a10->powerdown_gpio)) { + dev_err(dev, "Failed to get powerdown-gpios\n"); + return -EINVAL; + } + + ov02a10->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(ov02a10->reset_gpio)) { + dev_err(dev, "Failed to get reset-gpios\n"); + return -EINVAL; + } + + ret = ov02a10_configure_regulators(ov02a10); + if (ret) { + dev_err(dev, "Failed to get power regulators\n"); + return ret; + } + + mutex_init(&ov02a10->mutex); + ov02a10->cur_mode = &supported_modes[0]; + ret = ov02a10_initialize_controls(ov02a10); + if (ret) { + dev_err(dev, "Failed to initialize controls\n"); + goto err_destroy_mutex; + } + + ret = __ov02a10_power_on(ov02a10); + if (ret) + goto err_free_handler; + + ret = ov02a10_check_sensor_id(ov02a10); + if (ret) + goto err_power_off; + + ov02a10->subdev.internal_ops = &ov02a10_internal_ops; + ov02a10->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + ov02a10->subdev.entity.ops = &ov02a10_subdev_entity_ops; + ov02a10->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR; + ov02a10->pad.flags = MEDIA_PAD_FL_SOURCE; + ret = media_entity_pads_init(&ov02a10->subdev.entity, 1, &ov02a10->pad); + if (ret < 0) { + dev_err(dev, "failed to init entity pads: %d", ret); + goto err_power_off; + } + + ret = v4l2_async_register_subdev(&ov02a10->subdev); + if (ret) { + dev_err(dev, "failed to register V4L2 subdev: %d", + ret); + goto err_clean_entity; + } + + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + pm_runtime_idle(dev); + + dev_info(dev, "ov02a10 probe --\n"); + return 0; + +err_clean_entity: + media_entity_cleanup(&ov02a10->subdev.entity); +err_power_off: + __ov02a10_power_off(ov02a10); +err_free_handler: + v4l2_ctrl_handler_free(ov02a10->subdev.ctrl_handler); +err_destroy_mutex: + mutex_destroy(&ov02a10->mutex); + + return ret; +} + +static int ov02a10_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov02a10 *ov02a10 = to_ov02a10(sd); + + v4l2_async_unregister_subdev(sd); + media_entity_cleanup(&sd->entity); + v4l2_ctrl_handler_free(sd->ctrl_handler); + pm_runtime_disable(&client->dev); + if (!pm_runtime_status_suspended(&client->dev)) + __ov02a10_power_off(ov02a10); + pm_runtime_set_suspended(&client->dev); + mutex_destroy(&ov02a10->mutex); + + return 0; +} + +#if IS_ENABLED(CONFIG_OF) +static const struct of_device_id ov02a10_of_match[] = { + { .compatible = "ovti,ov02a10" }, + {}, +}; +MODULE_DEVICE_TABLE(of, ov02a10_of_match); +#endif + +static struct i2c_driver ov02a10_i2c_driver = { + .driver = { + .name = "ov02a10", + .pm = &ov02a10_pm_ops, + .of_match_table = ov02a10_of_match, + }, + .probe_new = &ov02a10_probe, + .remove = &ov02a10_remove, +}; + +module_i2c_driver(ov02a10_i2c_driver); + +MODULE_AUTHOR("Dongchun Zhu <dongchun....@mediatek.com>"); +MODULE_DESCRIPTION("OmniVision OV02A10 sensor driver"); +MODULE_LICENSE("GPL v2"); + -- 2.9.2