| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Martina Krasteva | 3983 | 68.37% | 1 | 3.70% |
| Dave Stevenson | 1781 | 30.57% | 18 | 66.67% |
| Alexander Stein | 32 | 0.55% | 2 | 7.41% |
| Laurent Pinchart | 15 | 0.26% | 2 | 7.41% |
| Steve Longerbeam | 10 | 0.17% | 1 | 3.70% |
| Sakari Ailus | 3 | 0.05% | 1 | 3.70% |
| Uwe Kleine-König | 2 | 0.03% | 2 | 7.41% |
| Total | 5826 | 27 |
// SPDX-License-Identifier: GPL-2.0-only /* * OmniVision ov9282 Camera Sensor Driver * * Copyright (C) 2021 Intel Corporation */ #include <asm/unaligned.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/i2c.h> #include <linux/module.h> #include <linux/pm_runtime.h> #include <linux/regulator/consumer.h> #include <media/v4l2-ctrls.h> #include <media/v4l2-event.h> #include <media/v4l2-fwnode.h> #include <media/v4l2-subdev.h> /* Streaming Mode */ #define OV9282_REG_MODE_SELECT 0x0100 #define OV9282_MODE_STANDBY 0x00 #define OV9282_MODE_STREAMING 0x01 #define OV9282_REG_PLL_CTRL_0D 0x030d #define OV9282_PLL_CTRL_0D_RAW8 0x60 #define OV9282_PLL_CTRL_0D_RAW10 0x50 #define OV9282_REG_TIMING_HTS 0x380c #define OV9282_TIMING_HTS_MAX 0x7fff /* Lines per frame */ #define OV9282_REG_LPFR 0x380e /* Chip ID */ #define OV9282_REG_ID 0x300a #define OV9282_ID 0x9281 /* Exposure control */ #define OV9282_REG_EXPOSURE 0x3500 #define OV9282_EXPOSURE_MIN 1 #define OV9282_EXPOSURE_OFFSET 12 #define OV9282_EXPOSURE_STEP 1 #define OV9282_EXPOSURE_DEFAULT 0x0282 /* Analog gain control */ #define OV9282_REG_AGAIN 0x3509 #define OV9282_AGAIN_MIN 0x10 #define OV9282_AGAIN_MAX 0xff #define OV9282_AGAIN_STEP 1 #define OV9282_AGAIN_DEFAULT 0x10 /* Group hold register */ #define OV9282_REG_HOLD 0x3308 #define OV9282_REG_ANA_CORE_2 0x3662 #define OV9282_ANA_CORE2_RAW8 0x07 #define OV9282_ANA_CORE2_RAW10 0x05 #define OV9282_REG_TIMING_FORMAT_1 0x3820 #define OV9282_REG_TIMING_FORMAT_2 0x3821 #define OV9282_FLIP_BIT BIT(2) #define OV9282_REG_MIPI_CTRL00 0x4800 #define OV9282_GATED_CLOCK BIT(5) /* Input clock rate */ #define OV9282_INCLK_RATE 24000000 /* CSI2 HW configuration */ #define OV9282_LINK_FREQ 400000000 #define OV9282_NUM_DATA_LANES 2 /* Pixel rate */ #define OV9282_PIXEL_RATE_10BIT (OV9282_LINK_FREQ * 2 * \ OV9282_NUM_DATA_LANES / 10) #define OV9282_PIXEL_RATE_8BIT (OV9282_LINK_FREQ * 2 * \ OV9282_NUM_DATA_LANES / 8) /* * OV9282 native and active pixel array size. * 8 dummy rows/columns on each edge of a 1280x800 active array */ #define OV9282_NATIVE_WIDTH 1296U #define OV9282_NATIVE_HEIGHT 816U #define OV9282_PIXEL_ARRAY_LEFT 8U #define OV9282_PIXEL_ARRAY_TOP 8U #define OV9282_PIXEL_ARRAY_WIDTH 1280U #define OV9282_PIXEL_ARRAY_HEIGHT 800U #define OV9282_REG_MIN 0x00 #define OV9282_REG_MAX 0xfffff static const char * const ov9282_supply_names[] = { "avdd", /* Analog power */ "dovdd", /* Digital I/O power */ "dvdd", /* Digital core power */ }; #define OV9282_NUM_SUPPLIES ARRAY_SIZE(ov9282_supply_names) /** * struct ov9282_reg - ov9282 sensor register * @address: Register address * @val: Register value */ struct ov9282_reg { u16 address; u8 val; }; /** * struct ov9282_reg_list - ov9282 sensor register list * @num_of_regs: Number of registers in the list * @regs: Pointer to register list */ struct ov9282_reg_list { u32 num_of_regs; const struct ov9282_reg *regs; }; /** * struct ov9282_mode - ov9282 sensor mode structure * @width: Frame width * @height: Frame height * @hblank_min: Minimum horizontal blanking in lines for non-continuous[0] and * continuous[1] clock modes * @vblank: Vertical blanking in lines * @vblank_min: Minimum vertical blanking in lines * @vblank_max: Maximum vertical blanking in lines * @link_freq_idx: Link frequency index * @crop: on-sensor cropping for this mode * @reg_list: Register list for sensor mode */ struct ov9282_mode { u32 width; u32 height; u32 hblank_min[2]; u32 vblank; u32 vblank_min; u32 vblank_max; u32 link_freq_idx; struct v4l2_rect crop; struct ov9282_reg_list reg_list; }; /** * struct ov9282 - ov9282 sensor device structure * @dev: Pointer to generic device * @sd: V4L2 sub-device * @pad: Media pad. Only one pad supported * @reset_gpio: Sensor reset gpio * @inclk: Sensor input clock * @supplies: Regulator supplies for the sensor * @ctrl_handler: V4L2 control handler * @link_freq_ctrl: Pointer to link frequency control * @hblank_ctrl: Pointer to horizontal blanking control * @vblank_ctrl: Pointer to vertical blanking control * @exp_ctrl: Pointer to exposure control * @again_ctrl: Pointer to analog gain control * @pixel_rate: Pointer to pixel rate control * @vblank: Vertical blanking in lines * @noncontinuous_clock: Selection of CSI2 noncontinuous clock mode * @cur_mode: Pointer to current selected sensor mode * @code: Mbus code currently selected * @mutex: Mutex for serializing sensor controls */ struct ov9282 { struct device *dev; struct v4l2_subdev sd; struct media_pad pad; struct gpio_desc *reset_gpio; struct clk *inclk; struct regulator_bulk_data supplies[OV9282_NUM_SUPPLIES]; struct v4l2_ctrl_handler ctrl_handler; struct v4l2_ctrl *link_freq_ctrl; struct v4l2_ctrl *hblank_ctrl; struct v4l2_ctrl *vblank_ctrl; struct { struct v4l2_ctrl *exp_ctrl; struct v4l2_ctrl *again_ctrl; }; struct v4l2_ctrl *pixel_rate; u32 vblank; bool noncontinuous_clock; const struct ov9282_mode *cur_mode; u32 code; struct mutex mutex; }; static const s64 link_freq[] = { OV9282_LINK_FREQ, }; /* * Common registers * * Note: Do NOT include a software reset (0x0103, 0x01) in any of these * register arrays as some settings are written as part of ov9282_power_on, * and the reset will clear them. */ static const struct ov9282_reg common_regs[] = { {0x0302, 0x32}, {0x030e, 0x02}, {0x3001, 0x00}, {0x3004, 0x00}, {0x3005, 0x00}, {0x3006, 0x04}, {0x3011, 0x0a}, {0x3013, 0x18}, {0x301c, 0xf0}, {0x3022, 0x01}, {0x3030, 0x10}, {0x3039, 0x32}, {0x303a, 0x00}, {0x3503, 0x08}, {0x3505, 0x8c}, {0x3507, 0x03}, {0x3508, 0x00}, {0x3610, 0x80}, {0x3611, 0xa0}, {0x3620, 0x6e}, {0x3632, 0x56}, {0x3633, 0x78}, {0x3666, 0x00}, {0x366f, 0x5a}, {0x3680, 0x84}, {0x3712, 0x80}, {0x372d, 0x22}, {0x3731, 0x80}, {0x3732, 0x30}, {0x377d, 0x22}, {0x3788, 0x02}, {0x3789, 0xa4}, {0x378a, 0x00}, {0x378b, 0x4a}, {0x3799, 0x20}, {0x3881, 0x42}, {0x38a8, 0x02}, {0x38a9, 0x80}, {0x38b1, 0x00}, {0x38c4, 0x00}, {0x38c5, 0xc0}, {0x38c6, 0x04}, {0x38c7, 0x80}, {0x3920, 0xff}, {0x4010, 0x40}, {0x4043, 0x40}, {0x4307, 0x30}, {0x4317, 0x00}, {0x4501, 0x00}, {0x450a, 0x08}, {0x4601, 0x04}, {0x470f, 0x00}, {0x4f07, 0x00}, {0x5000, 0x9f}, {0x5001, 0x00}, {0x5e00, 0x00}, {0x5d00, 0x07}, {0x5d01, 0x00}, {0x0101, 0x01}, {0x1000, 0x03}, {0x5a08, 0x84}, }; static struct ov9282_reg_list common_regs_list = { .num_of_regs = ARRAY_SIZE(common_regs), .regs = common_regs, }; #define MODE_1280_800 0 #define MODE_1280_720 1 #define MODE_640_400 2 #define DEFAULT_MODE MODE_1280_720 /* Sensor mode registers */ static const struct ov9282_reg mode_1280x800_regs[] = { {0x3778, 0x00}, {0x3800, 0x00}, {0x3801, 0x00}, {0x3802, 0x00}, {0x3803, 0x00}, {0x3804, 0x05}, {0x3805, 0x0f}, {0x3806, 0x03}, {0x3807, 0x2f}, {0x3808, 0x05}, {0x3809, 0x00}, {0x380a, 0x03}, {0x380b, 0x20}, {0x3810, 0x00}, {0x3811, 0x08}, {0x3812, 0x00}, {0x3813, 0x08}, {0x3814, 0x11}, {0x3815, 0x11}, {0x3820, 0x40}, {0x3821, 0x00}, {0x4003, 0x40}, {0x4008, 0x04}, {0x4009, 0x0b}, {0x400c, 0x00}, {0x400d, 0x07}, {0x4507, 0x00}, {0x4509, 0x00}, }; static const struct ov9282_reg mode_1280x720_regs[] = { {0x3778, 0x00}, {0x3800, 0x00}, {0x3801, 0x00}, {0x3802, 0x00}, {0x3803, 0x00}, {0x3804, 0x05}, {0x3805, 0x0f}, {0x3806, 0x02}, {0x3807, 0xdf}, {0x3808, 0x05}, {0x3809, 0x00}, {0x380a, 0x02}, {0x380b, 0xd0}, {0x3810, 0x00}, {0x3811, 0x08}, {0x3812, 0x00}, {0x3813, 0x08}, {0x3814, 0x11}, {0x3815, 0x11}, {0x3820, 0x3c}, {0x3821, 0x84}, {0x4003, 0x40}, {0x4008, 0x02}, {0x4009, 0x05}, {0x400c, 0x00}, {0x400d, 0x03}, {0x4507, 0x00}, {0x4509, 0x80}, }; static const struct ov9282_reg mode_640x400_regs[] = { {0x3778, 0x10}, {0x3800, 0x00}, {0x3801, 0x00}, {0x3802, 0x00}, {0x3803, 0x00}, {0x3804, 0x05}, {0x3805, 0x0f}, {0x3806, 0x03}, {0x3807, 0x2f}, {0x3808, 0x02}, {0x3809, 0x80}, {0x380a, 0x01}, {0x380b, 0x90}, {0x3810, 0x00}, {0x3811, 0x04}, {0x3812, 0x00}, {0x3813, 0x04}, {0x3814, 0x31}, {0x3815, 0x22}, {0x3820, 0x60}, {0x3821, 0x01}, {0x4008, 0x02}, {0x4009, 0x05}, {0x400c, 0x00}, {0x400d, 0x03}, {0x4507, 0x03}, {0x4509, 0x80}, }; /* Supported sensor mode configurations */ static const struct ov9282_mode supported_modes[] = { [MODE_1280_800] = { .width = 1280, .height = 800, .hblank_min = { 250, 176 }, .vblank = 1022, .vblank_min = 110, .vblank_max = 51540, .link_freq_idx = 0, .crop = { .left = OV9282_PIXEL_ARRAY_LEFT, .top = OV9282_PIXEL_ARRAY_TOP, .width = 1280, .height = 800 }, .reg_list = { .num_of_regs = ARRAY_SIZE(mode_1280x800_regs), .regs = mode_1280x800_regs, }, }, [MODE_1280_720] = { .width = 1280, .height = 720, .hblank_min = { 250, 176 }, .vblank = 1022, .vblank_min = 41, .vblank_max = 51540, .link_freq_idx = 0, .crop = { /* * Note that this mode takes the top 720 lines from the * 800 of the sensor. It does not take a middle crop. */ .left = OV9282_PIXEL_ARRAY_LEFT, .top = OV9282_PIXEL_ARRAY_TOP, .width = 1280, .height = 720 }, .reg_list = { .num_of_regs = ARRAY_SIZE(mode_1280x720_regs), .regs = mode_1280x720_regs, }, }, [MODE_640_400] = { .width = 640, .height = 400, .hblank_min = { 890, 816 }, .vblank = 1022, .vblank_min = 22, .vblank_max = 51540, .link_freq_idx = 0, .crop = { .left = OV9282_PIXEL_ARRAY_LEFT, .top = OV9282_PIXEL_ARRAY_TOP, .width = 1280, .height = 800 }, .reg_list = { .num_of_regs = ARRAY_SIZE(mode_640x400_regs), .regs = mode_640x400_regs, }, }, }; /** * to_ov9282() - ov9282 V4L2 sub-device to ov9282 device. * @subdev: pointer to ov9282 V4L2 sub-device * * Return: pointer to ov9282 device */ static inline struct ov9282 *to_ov9282(struct v4l2_subdev *subdev) { return container_of(subdev, struct ov9282, sd); } /** * ov9282_read_reg() - Read registers. * @ov9282: pointer to ov9282 device * @reg: register address * @len: length of bytes to read. Max supported bytes is 4 * @val: pointer to register value to be filled. * * Return: 0 if successful, error code otherwise. */ static int ov9282_read_reg(struct ov9282 *ov9282, u16 reg, u32 len, u32 *val) { struct i2c_client *client = v4l2_get_subdevdata(&ov9282->sd); struct i2c_msg msgs[2] = {0}; u8 addr_buf[2] = {0}; u8 data_buf[4] = {0}; int ret; if (WARN_ON(len > 4)) return -EINVAL; put_unaligned_be16(reg, addr_buf); /* Write register address */ msgs[0].addr = client->addr; msgs[0].flags = 0; msgs[0].len = ARRAY_SIZE(addr_buf); msgs[0].buf = addr_buf; /* Read data from register */ 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)) return -EIO; *val = get_unaligned_be32(data_buf); return 0; } /** * ov9282_write_reg() - Write register * @ov9282: pointer to ov9282 device * @reg: register address * @len: length of bytes. Max supported bytes is 4 * @val: register value * * Return: 0 if successful, error code otherwise. */ static int ov9282_write_reg(struct ov9282 *ov9282, u16 reg, u32 len, u32 val) { struct i2c_client *client = v4l2_get_subdevdata(&ov9282->sd); u8 buf[6] = {0}; if (WARN_ON(len > 4)) return -EINVAL; put_unaligned_be16(reg, buf); put_unaligned_be32(val << (8 * (4 - len)), buf + 2); if (i2c_master_send(client, buf, len + 2) != len + 2) return -EIO; return 0; } /** * ov9282_write_regs() - Write a list of registers * @ov9282: pointer to ov9282 device * @regs: list of registers to be written * @len: length of registers array * * Return: 0 if successful, error code otherwise. */ static int ov9282_write_regs(struct ov9282 *ov9282, const struct ov9282_reg *regs, u32 len) { unsigned int i; int ret; for (i = 0; i < len; i++) { ret = ov9282_write_reg(ov9282, regs[i].address, 1, regs[i].val); if (ret) return ret; } return 0; } /** * ov9282_update_controls() - Update control ranges based on streaming mode * @ov9282: pointer to ov9282 device * @mode: pointer to ov9282_mode sensor mode * @fmt: pointer to the requested mode * * Return: 0 if successful, error code otherwise. */ static int ov9282_update_controls(struct ov9282 *ov9282, const struct ov9282_mode *mode, const struct v4l2_subdev_format *fmt) { u32 hblank_min; s64 pixel_rate; int ret; ret = __v4l2_ctrl_s_ctrl(ov9282->link_freq_ctrl, mode->link_freq_idx); if (ret) return ret; pixel_rate = (fmt->format.code == MEDIA_BUS_FMT_Y10_1X10) ? OV9282_PIXEL_RATE_10BIT : OV9282_PIXEL_RATE_8BIT; ret = __v4l2_ctrl_modify_range(ov9282->pixel_rate, pixel_rate, pixel_rate, 1, pixel_rate); if (ret) return ret; hblank_min = mode->hblank_min[ov9282->noncontinuous_clock ? 0 : 1]; ret = __v4l2_ctrl_modify_range(ov9282->hblank_ctrl, hblank_min, OV9282_TIMING_HTS_MAX - mode->width, 1, hblank_min); if (ret) return ret; return __v4l2_ctrl_modify_range(ov9282->vblank_ctrl, mode->vblank_min, mode->vblank_max, 1, mode->vblank); } /** * ov9282_update_exp_gain() - Set updated exposure and gain * @ov9282: pointer to ov9282 device * @exposure: updated exposure value * @gain: updated analog gain value * * Return: 0 if successful, error code otherwise. */ static int ov9282_update_exp_gain(struct ov9282 *ov9282, u32 exposure, u32 gain) { int ret; dev_dbg(ov9282->dev, "Set exp %u, analog gain %u", exposure, gain); ret = ov9282_write_reg(ov9282, OV9282_REG_HOLD, 1, 1); if (ret) return ret; ret = ov9282_write_reg(ov9282, OV9282_REG_EXPOSURE, 3, exposure << 4); if (ret) goto error_release_group_hold; ret = ov9282_write_reg(ov9282, OV9282_REG_AGAIN, 1, gain); error_release_group_hold: ov9282_write_reg(ov9282, OV9282_REG_HOLD, 1, 0); return ret; } static int ov9282_set_ctrl_hflip(struct ov9282 *ov9282, int value) { u32 current_val; int ret = ov9282_read_reg(ov9282, OV9282_REG_TIMING_FORMAT_2, 1, ¤t_val); if (ret) return ret; if (value) current_val |= OV9282_FLIP_BIT; else current_val &= ~OV9282_FLIP_BIT; return ov9282_write_reg(ov9282, OV9282_REG_TIMING_FORMAT_2, 1, current_val); } static int ov9282_set_ctrl_vflip(struct ov9282 *ov9282, int value) { u32 current_val; int ret = ov9282_read_reg(ov9282, OV9282_REG_TIMING_FORMAT_1, 1, ¤t_val); if (ret) return ret; if (value) current_val |= OV9282_FLIP_BIT; else current_val &= ~OV9282_FLIP_BIT; return ov9282_write_reg(ov9282, OV9282_REG_TIMING_FORMAT_1, 1, current_val); } /** * ov9282_set_ctrl() - Set subdevice control * @ctrl: pointer to v4l2_ctrl structure * * Supported controls: * - V4L2_CID_VBLANK * - cluster controls: * - V4L2_CID_ANALOGUE_GAIN * - V4L2_CID_EXPOSURE * * Return: 0 if successful, error code otherwise. */ static int ov9282_set_ctrl(struct v4l2_ctrl *ctrl) { struct ov9282 *ov9282 = container_of(ctrl->handler, struct ov9282, ctrl_handler); u32 analog_gain; u32 exposure; u32 lpfr; int ret; switch (ctrl->id) { case V4L2_CID_VBLANK: ov9282->vblank = ov9282->vblank_ctrl->val; dev_dbg(ov9282->dev, "Received vblank %u, new lpfr %u", ov9282->vblank, ov9282->vblank + ov9282->cur_mode->height); ret = __v4l2_ctrl_modify_range(ov9282->exp_ctrl, OV9282_EXPOSURE_MIN, ov9282->vblank + ov9282->cur_mode->height - OV9282_EXPOSURE_OFFSET, 1, OV9282_EXPOSURE_DEFAULT); break; } /* Set controls only if sensor is in power on state */ if (!pm_runtime_get_if_in_use(ov9282->dev)) return 0; switch (ctrl->id) { case V4L2_CID_EXPOSURE: exposure = ctrl->val; analog_gain = ov9282->again_ctrl->val; dev_dbg(ov9282->dev, "Received exp %u, analog gain %u", exposure, analog_gain); ret = ov9282_update_exp_gain(ov9282, exposure, analog_gain); break; case V4L2_CID_VBLANK: lpfr = ov9282->vblank + ov9282->cur_mode->height; ret = ov9282_write_reg(ov9282, OV9282_REG_LPFR, 2, lpfr); break; case V4L2_CID_HFLIP: ret = ov9282_set_ctrl_hflip(ov9282, ctrl->val); break; case V4L2_CID_VFLIP: ret = ov9282_set_ctrl_vflip(ov9282, ctrl->val); break; case V4L2_CID_HBLANK: ret = ov9282_write_reg(ov9282, OV9282_REG_TIMING_HTS, 2, (ctrl->val + ov9282->cur_mode->width) >> 1); break; default: dev_err(ov9282->dev, "Invalid control %d", ctrl->id); ret = -EINVAL; } pm_runtime_put(ov9282->dev); return ret; } /* V4l2 subdevice control ops*/ static const struct v4l2_ctrl_ops ov9282_ctrl_ops = { .s_ctrl = ov9282_set_ctrl, }; /** * ov9282_enum_mbus_code() - Enumerate V4L2 sub-device mbus codes * @sd: pointer to ov9282 V4L2 sub-device structure * @sd_state: V4L2 sub-device configuration * @code: V4L2 sub-device code enumeration need to be filled * * Return: 0 if successful, error code otherwise. */ static int ov9282_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_mbus_code_enum *code) { switch (code->index) { case 0: code->code = MEDIA_BUS_FMT_Y10_1X10; break; case 1: code->code = MEDIA_BUS_FMT_Y8_1X8; break; default: return -EINVAL; } return 0; } /** * ov9282_enum_frame_size() - Enumerate V4L2 sub-device frame sizes * @sd: pointer to ov9282 V4L2 sub-device structure * @sd_state: V4L2 sub-device configuration * @fsize: V4L2 sub-device size enumeration need to be filled * * Return: 0 if successful, error code otherwise. */ static int ov9282_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_frame_size_enum *fsize) { if (fsize->index >= ARRAY_SIZE(supported_modes)) return -EINVAL; if (fsize->code != MEDIA_BUS_FMT_Y10_1X10 && fsize->code != MEDIA_BUS_FMT_Y8_1X8) return -EINVAL; fsize->min_width = supported_modes[fsize->index].width; fsize->max_width = fsize->min_width; fsize->min_height = supported_modes[fsize->index].height; fsize->max_height = fsize->min_height; return 0; } /** * ov9282_fill_pad_format() - Fill subdevice pad format * from selected sensor mode * @ov9282: pointer to ov9282 device * @mode: pointer to ov9282_mode sensor mode * @code: mbus code to be stored * @fmt: V4L2 sub-device format need to be filled */ static void ov9282_fill_pad_format(struct ov9282 *ov9282, const struct ov9282_mode *mode, u32 code, struct v4l2_subdev_format *fmt) { fmt->format.width = mode->width; fmt->format.height = mode->height; fmt->format.code = code; fmt->format.field = V4L2_FIELD_NONE; fmt->format.colorspace = V4L2_COLORSPACE_RAW; fmt->format.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT; fmt->format.quantization = V4L2_QUANTIZATION_DEFAULT; fmt->format.xfer_func = V4L2_XFER_FUNC_NONE; } /** * ov9282_get_pad_format() - Get subdevice pad format * @sd: pointer to ov9282 V4L2 sub-device structure * @sd_state: V4L2 sub-device configuration * @fmt: V4L2 sub-device format need to be set * * Return: 0 if successful, error code otherwise. */ static int ov9282_get_pad_format(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *fmt) { struct ov9282 *ov9282 = to_ov9282(sd); mutex_lock(&ov9282->mutex); if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { struct v4l2_mbus_framefmt *framefmt; framefmt = v4l2_subdev_state_get_format(sd_state, fmt->pad); fmt->format = *framefmt; } else { ov9282_fill_pad_format(ov9282, ov9282->cur_mode, ov9282->code, fmt); } mutex_unlock(&ov9282->mutex); return 0; } /** * ov9282_set_pad_format() - Set subdevice pad format * @sd: pointer to ov9282 V4L2 sub-device structure * @sd_state: V4L2 sub-device configuration * @fmt: V4L2 sub-device format need to be set * * Return: 0 if successful, error code otherwise. */ static int ov9282_set_pad_format(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *fmt) { struct ov9282 *ov9282 = to_ov9282(sd); const struct ov9282_mode *mode; u32 code; int ret = 0; mutex_lock(&ov9282->mutex); mode = v4l2_find_nearest_size(supported_modes, ARRAY_SIZE(supported_modes), width, height, fmt->format.width, fmt->format.height); if (fmt->format.code == MEDIA_BUS_FMT_Y8_1X8) code = MEDIA_BUS_FMT_Y8_1X8; else code = MEDIA_BUS_FMT_Y10_1X10; ov9282_fill_pad_format(ov9282, mode, code, fmt); if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { struct v4l2_mbus_framefmt *framefmt; framefmt = v4l2_subdev_state_get_format(sd_state, fmt->pad); *framefmt = fmt->format; } else { ret = ov9282_update_controls(ov9282, mode, fmt); if (!ret) { ov9282->cur_mode = mode; ov9282->code = code; } } mutex_unlock(&ov9282->mutex); return ret; } /** * ov9282_init_state() - Initialize sub-device state * @sd: pointer to ov9282 V4L2 sub-device structure * @sd_state: V4L2 sub-device configuration * * Return: 0 if successful, error code otherwise. */ static int ov9282_init_state(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state) { struct ov9282 *ov9282 = to_ov9282(sd); struct v4l2_subdev_format fmt = { 0 }; fmt.which = sd_state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; ov9282_fill_pad_format(ov9282, &supported_modes[DEFAULT_MODE], ov9282->code, &fmt); return ov9282_set_pad_format(sd, sd_state, &fmt); } static const struct v4l2_rect * __ov9282_get_pad_crop(struct ov9282 *ov9282, struct v4l2_subdev_state *sd_state, unsigned int pad, enum v4l2_subdev_format_whence which) { switch (which) { case V4L2_SUBDEV_FORMAT_TRY: return v4l2_subdev_state_get_crop(sd_state, pad); case V4L2_SUBDEV_FORMAT_ACTIVE: return &ov9282->cur_mode->crop; } return NULL; } static int ov9282_get_selection(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_selection *sel) { switch (sel->target) { case V4L2_SEL_TGT_CROP: { struct ov9282 *ov9282 = to_ov9282(sd); mutex_lock(&ov9282->mutex); sel->r = *__ov9282_get_pad_crop(ov9282, sd_state, sel->pad, sel->which); mutex_unlock(&ov9282->mutex); return 0; } case V4L2_SEL_TGT_NATIVE_SIZE: sel->r.top = 0; sel->r.left = 0; sel->r.width = OV9282_NATIVE_WIDTH; sel->r.height = OV9282_NATIVE_HEIGHT; return 0; case V4L2_SEL_TGT_CROP_DEFAULT: case V4L2_SEL_TGT_CROP_BOUNDS: sel->r.top = OV9282_PIXEL_ARRAY_TOP; sel->r.left = OV9282_PIXEL_ARRAY_LEFT; sel->r.width = OV9282_PIXEL_ARRAY_WIDTH; sel->r.height = OV9282_PIXEL_ARRAY_HEIGHT; return 0; } return -EINVAL; } /** * ov9282_start_streaming() - Start sensor stream * @ov9282: pointer to ov9282 device * * Return: 0 if successful, error code otherwise. */ static int ov9282_start_streaming(struct ov9282 *ov9282) { const struct ov9282_reg bitdepth_regs[2][2] = { { {OV9282_REG_PLL_CTRL_0D, OV9282_PLL_CTRL_0D_RAW10}, {OV9282_REG_ANA_CORE_2, OV9282_ANA_CORE2_RAW10}, }, { {OV9282_REG_PLL_CTRL_0D, OV9282_PLL_CTRL_0D_RAW8}, {OV9282_REG_ANA_CORE_2, OV9282_ANA_CORE2_RAW8}, } }; const struct ov9282_reg_list *reg_list; int bitdepth_index; int ret; /* Write common registers */ ret = ov9282_write_regs(ov9282, common_regs_list.regs, common_regs_list.num_of_regs); if (ret) { dev_err(ov9282->dev, "fail to write common registers"); return ret; } bitdepth_index = ov9282->code == MEDIA_BUS_FMT_Y10_1X10 ? 0 : 1; ret = ov9282_write_regs(ov9282, bitdepth_regs[bitdepth_index], 2); if (ret) { dev_err(ov9282->dev, "fail to write bitdepth regs"); return ret; } /* Write sensor mode registers */ reg_list = &ov9282->cur_mode->reg_list; ret = ov9282_write_regs(ov9282, reg_list->regs, reg_list->num_of_regs); if (ret) { dev_err(ov9282->dev, "fail to write initial registers"); return ret; } /* Setup handler will write actual exposure and gain */ ret = __v4l2_ctrl_handler_setup(ov9282->sd.ctrl_handler); if (ret) { dev_err(ov9282->dev, "fail to setup handler"); return ret; } /* Start streaming */ ret = ov9282_write_reg(ov9282, OV9282_REG_MODE_SELECT, 1, OV9282_MODE_STREAMING); if (ret) { dev_err(ov9282->dev, "fail to start streaming"); return ret; } return 0; } /** * ov9282_stop_streaming() - Stop sensor stream * @ov9282: pointer to ov9282 device * * Return: 0 if successful, error code otherwise. */ static int ov9282_stop_streaming(struct ov9282 *ov9282) { return ov9282_write_reg(ov9282, OV9282_REG_MODE_SELECT, 1, OV9282_MODE_STANDBY); } /** * ov9282_set_stream() - Enable sensor streaming * @sd: pointer to ov9282 subdevice * @enable: set to enable sensor streaming * * Return: 0 if successful, error code otherwise. */ static int ov9282_set_stream(struct v4l2_subdev *sd, int enable) { struct ov9282 *ov9282 = to_ov9282(sd); int ret; mutex_lock(&ov9282->mutex); if (enable) { ret = pm_runtime_resume_and_get(ov9282->dev); if (ret) goto error_unlock; ret = ov9282_start_streaming(ov9282); if (ret) goto error_power_off; } else { ov9282_stop_streaming(ov9282); pm_runtime_put(ov9282->dev); } mutex_unlock(&ov9282->mutex); return 0; error_power_off: pm_runtime_put(ov9282->dev); error_unlock: mutex_unlock(&ov9282->mutex); return ret; } /** * ov9282_detect() - Detect ov9282 sensor * @ov9282: pointer to ov9282 device * * Return: 0 if successful, -EIO if sensor id does not match */ static int ov9282_detect(struct ov9282 *ov9282) { int ret; u32 val; ret = ov9282_read_reg(ov9282, OV9282_REG_ID, 2, &val); if (ret) return ret; if (val != OV9282_ID) { dev_err(ov9282->dev, "chip id mismatch: %x!=%x", OV9282_ID, val); return -ENXIO; } return 0; } static int ov9282_configure_regulators(struct ov9282 *ov9282) { unsigned int i; for (i = 0; i < OV9282_NUM_SUPPLIES; i++) ov9282->supplies[i].supply = ov9282_supply_names[i]; return devm_regulator_bulk_get(ov9282->dev, OV9282_NUM_SUPPLIES, ov9282->supplies); } /** * ov9282_parse_hw_config() - Parse HW configuration and check if supported * @ov9282: pointer to ov9282 device * * Return: 0 if successful, error code otherwise. */ static int ov9282_parse_hw_config(struct ov9282 *ov9282) { struct fwnode_handle *fwnode = dev_fwnode(ov9282->dev); struct v4l2_fwnode_endpoint bus_cfg = { .bus_type = V4L2_MBUS_CSI2_DPHY }; struct fwnode_handle *ep; unsigned long rate; unsigned int i; int ret; if (!fwnode) return -ENXIO; /* Request optional reset pin */ ov9282->reset_gpio = devm_gpiod_get_optional(ov9282->dev, "reset", GPIOD_OUT_LOW); if (IS_ERR(ov9282->reset_gpio)) { dev_err(ov9282->dev, "failed to get reset gpio %ld", PTR_ERR(ov9282->reset_gpio)); return PTR_ERR(ov9282->reset_gpio); } /* Get sensor input clock */ ov9282->inclk = devm_clk_get(ov9282->dev, NULL); if (IS_ERR(ov9282->inclk)) { dev_err(ov9282->dev, "could not get inclk"); return PTR_ERR(ov9282->inclk); } ret = ov9282_configure_regulators(ov9282); if (ret) return dev_err_probe(ov9282->dev, ret, "Failed to get power regulators\n"); rate = clk_get_rate(ov9282->inclk); if (rate != OV9282_INCLK_RATE) { dev_err(ov9282->dev, "inclk frequency mismatch"); return -EINVAL; } ep = fwnode_graph_get_next_endpoint(fwnode, NULL); if (!ep) return -ENXIO; ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg); fwnode_handle_put(ep); if (ret) return ret; ov9282->noncontinuous_clock = bus_cfg.bus.mipi_csi2.flags & V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK; if (bus_cfg.bus.mipi_csi2.num_data_lanes != OV9282_NUM_DATA_LANES) { dev_err(ov9282->dev, "number of CSI2 data lanes %d is not supported", bus_cfg.bus.mipi_csi2.num_data_lanes); ret = -EINVAL; goto done_endpoint_free; } if (!bus_cfg.nr_of_link_frequencies) { dev_err(ov9282->dev, "no link frequencies defined"); ret = -EINVAL; goto done_endpoint_free; } for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++) if (bus_cfg.link_frequencies[i] == OV9282_LINK_FREQ) goto done_endpoint_free; ret = -EINVAL; done_endpoint_free: v4l2_fwnode_endpoint_free(&bus_cfg); return ret; } /* V4l2 subdevice ops */ static const struct v4l2_subdev_core_ops ov9282_core_ops = { .subscribe_event = v4l2_ctrl_subdev_subscribe_event, .unsubscribe_event = v4l2_event_subdev_unsubscribe, }; static const struct v4l2_subdev_video_ops ov9282_video_ops = { .s_stream = ov9282_set_stream, }; static const struct v4l2_subdev_pad_ops ov9282_pad_ops = { .enum_mbus_code = ov9282_enum_mbus_code, .enum_frame_size = ov9282_enum_frame_size, .get_fmt = ov9282_get_pad_format, .set_fmt = ov9282_set_pad_format, .get_selection = ov9282_get_selection, }; static const struct v4l2_subdev_ops ov9282_subdev_ops = { .core = &ov9282_core_ops, .video = &ov9282_video_ops, .pad = &ov9282_pad_ops, }; static const struct v4l2_subdev_internal_ops ov9282_internal_ops = { .init_state = ov9282_init_state, }; /** * ov9282_power_on() - Sensor power on sequence * @dev: pointer to i2c device * * Return: 0 if successful, error code otherwise. */ static int ov9282_power_on(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct ov9282 *ov9282 = to_ov9282(sd); int ret; ret = regulator_bulk_enable(OV9282_NUM_SUPPLIES, ov9282->supplies); if (ret < 0) { dev_err(dev, "Failed to enable regulators\n"); return ret; } usleep_range(400, 600); gpiod_set_value_cansleep(ov9282->reset_gpio, 1); ret = clk_prepare_enable(ov9282->inclk); if (ret) { dev_err(ov9282->dev, "fail to enable inclk"); goto error_reset; } usleep_range(400, 600); ret = ov9282_write_reg(ov9282, OV9282_REG_MIPI_CTRL00, 1, ov9282->noncontinuous_clock ? OV9282_GATED_CLOCK : 0); if (ret) { dev_err(ov9282->dev, "fail to write MIPI_CTRL00"); goto error_clk; } return 0; error_clk: clk_disable_unprepare(ov9282->inclk); error_reset: gpiod_set_value_cansleep(ov9282->reset_gpio, 0); regulator_bulk_disable(OV9282_NUM_SUPPLIES, ov9282->supplies); return ret; } /** * ov9282_power_off() - Sensor power off sequence * @dev: pointer to i2c device * * Return: 0 if successful, error code otherwise. */ static int ov9282_power_off(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct ov9282 *ov9282 = to_ov9282(sd); gpiod_set_value_cansleep(ov9282->reset_gpio, 0); clk_disable_unprepare(ov9282->inclk); regulator_bulk_disable(OV9282_NUM_SUPPLIES, ov9282->supplies); return 0; } /** * ov9282_init_controls() - Initialize sensor subdevice controls * @ov9282: pointer to ov9282 device * * Return: 0 if successful, error code otherwise. */ static int ov9282_init_controls(struct ov9282 *ov9282) { struct v4l2_ctrl_handler *ctrl_hdlr = &ov9282->ctrl_handler; const struct ov9282_mode *mode = ov9282->cur_mode; struct v4l2_fwnode_device_properties props; u32 hblank_min; u32 lpfr; int ret; ret = v4l2_ctrl_handler_init(ctrl_hdlr, 10); if (ret) return ret; /* Serialize controls with sensor device */ ctrl_hdlr->lock = &ov9282->mutex; /* Initialize exposure and gain */ lpfr = mode->vblank + mode->height; ov9282->exp_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &ov9282_ctrl_ops, V4L2_CID_EXPOSURE, OV9282_EXPOSURE_MIN, lpfr - OV9282_EXPOSURE_OFFSET, OV9282_EXPOSURE_STEP, OV9282_EXPOSURE_DEFAULT); ov9282->again_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &ov9282_ctrl_ops, V4L2_CID_ANALOGUE_GAIN, OV9282_AGAIN_MIN, OV9282_AGAIN_MAX, OV9282_AGAIN_STEP, OV9282_AGAIN_DEFAULT); v4l2_ctrl_cluster(2, &ov9282->exp_ctrl); ov9282->vblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &ov9282_ctrl_ops, V4L2_CID_VBLANK, mode->vblank_min, mode->vblank_max, 1, mode->vblank); v4l2_ctrl_new_std(ctrl_hdlr, &ov9282_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 1); v4l2_ctrl_new_std(ctrl_hdlr, &ov9282_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 1); /* Read only controls */ ov9282->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov9282_ctrl_ops, V4L2_CID_PIXEL_RATE, OV9282_PIXEL_RATE_10BIT, OV9282_PIXEL_RATE_10BIT, 1, OV9282_PIXEL_RATE_10BIT); ov9282->link_freq_ctrl = v4l2_ctrl_new_int_menu(ctrl_hdlr, &ov9282_ctrl_ops, V4L2_CID_LINK_FREQ, ARRAY_SIZE(link_freq) - 1, mode->link_freq_idx, link_freq); if (ov9282->link_freq_ctrl) ov9282->link_freq_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; hblank_min = mode->hblank_min[ov9282->noncontinuous_clock ? 0 : 1]; ov9282->hblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &ov9282_ctrl_ops, V4L2_CID_HBLANK, hblank_min, OV9282_TIMING_HTS_MAX - mode->width, 1, hblank_min); ret = v4l2_fwnode_device_parse(ov9282->dev, &props); if (!ret) { /* Failure sets ctrl_hdlr->error, which we check afterwards anyway */ v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &ov9282_ctrl_ops, &props); } if (ctrl_hdlr->error || ret) { dev_err(ov9282->dev, "control init failed: %d", ctrl_hdlr->error); v4l2_ctrl_handler_free(ctrl_hdlr); return ctrl_hdlr->error; } ov9282->sd.ctrl_handler = ctrl_hdlr; return 0; } /** * ov9282_probe() - I2C client device binding * @client: pointer to i2c client device * * Return: 0 if successful, error code otherwise. */ static int ov9282_probe(struct i2c_client *client) { struct ov9282 *ov9282; int ret; ov9282 = devm_kzalloc(&client->dev, sizeof(*ov9282), GFP_KERNEL); if (!ov9282) return -ENOMEM; ov9282->dev = &client->dev; /* Initialize subdev */ v4l2_i2c_subdev_init(&ov9282->sd, client, &ov9282_subdev_ops); ov9282->sd.internal_ops = &ov9282_internal_ops; v4l2_i2c_subdev_set_name(&ov9282->sd, client, device_get_match_data(ov9282->dev), NULL); ret = ov9282_parse_hw_config(ov9282); if (ret) { dev_err(ov9282->dev, "HW configuration is not supported"); return ret; } mutex_init(&ov9282->mutex); ret = ov9282_power_on(ov9282->dev); if (ret) { dev_err(ov9282->dev, "failed to power-on the sensor"); goto error_mutex_destroy; } /* Check module identity */ ret = ov9282_detect(ov9282); if (ret) { dev_err(ov9282->dev, "failed to find sensor: %d", ret); goto error_power_off; } /* Set default mode to first mode */ ov9282->cur_mode = &supported_modes[DEFAULT_MODE]; ov9282->code = MEDIA_BUS_FMT_Y10_1X10; ov9282->vblank = ov9282->cur_mode->vblank; ret = ov9282_init_controls(ov9282); if (ret) { dev_err(ov9282->dev, "failed to init controls: %d", ret); goto error_power_off; } /* Initialize subdev */ ov9282->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; ov9282->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; /* Initialize source pad */ ov9282->pad.flags = MEDIA_PAD_FL_SOURCE; ret = media_entity_pads_init(&ov9282->sd.entity, 1, &ov9282->pad); if (ret) { dev_err(ov9282->dev, "failed to init entity pads: %d", ret); goto error_handler_free; } ret = v4l2_async_register_subdev_sensor(&ov9282->sd); if (ret < 0) { dev_err(ov9282->dev, "failed to register async subdev: %d", ret); goto error_media_entity; } pm_runtime_set_active(ov9282->dev); pm_runtime_enable(ov9282->dev); pm_runtime_idle(ov9282->dev); return 0; error_media_entity: media_entity_cleanup(&ov9282->sd.entity); error_handler_free: v4l2_ctrl_handler_free(ov9282->sd.ctrl_handler); error_power_off: ov9282_power_off(ov9282->dev); error_mutex_destroy: mutex_destroy(&ov9282->mutex); return ret; } /** * ov9282_remove() - I2C client device unbinding * @client: pointer to I2C client device * * Return: 0 if successful, error code otherwise. */ static void ov9282_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); struct ov9282 *ov9282 = to_ov9282(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)) ov9282_power_off(&client->dev); pm_runtime_set_suspended(&client->dev); mutex_destroy(&ov9282->mutex); } static const struct dev_pm_ops ov9282_pm_ops = { SET_RUNTIME_PM_OPS(ov9282_power_off, ov9282_power_on, NULL) }; static const struct of_device_id ov9282_of_match[] = { { .compatible = "ovti,ov9281", .data = "ov9281" }, { .compatible = "ovti,ov9282", .data = "ov9282" }, { } }; MODULE_DEVICE_TABLE(of, ov9282_of_match); static struct i2c_driver ov9282_driver = { .probe = ov9282_probe, .remove = ov9282_remove, .driver = { .name = "ov9282", .pm = &ov9282_pm_ops, .of_match_table = ov9282_of_match, }, }; module_i2c_driver(ov9282_driver); MODULE_DESCRIPTION("OmniVision ov9282 sensor driver"); MODULE_LICENSE("GPL");
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