// SPDX-License-Identifier: GPL-2.0 /* * ov7251 driver * * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef V4L2_CID_DIGITAL_GAIN #define V4L2_CID_DIGITAL_GAIN V4L2_CID_GAIN #endif /* 48Mhz */ #define OV7251_PIXEL_RATE (48 * 1000 * 1000) #define OV7251_XVCLK_FREQ 24000000 #define CHIP_ID 0x007750 #define OV7251_REG_CHIP_ID 0x300a #define OV7251_REG_MOD_VENDOR_ID 0x3d10 #define OV7251_REG_OPT_LOAD_CTRL 0x3d81 #define OV7251_REG_CTRL_MODE 0x0100 #define OV7251_MODE_SW_STANDBY 0x0 #define OV7251_MODE_STREAMING BIT(0) #define OV7251_REG_EXPOSURE 0x3500 #define OV7251_EXPOSURE_MIN 4 #define OV7251_EXPOSURE_STEP 0xf #define OV7251_VTS_MAX 0xffff #define OV7251_REG_ANALOG_GAIN 0x350a #define ANALOG_GAIN_MASK 0x3ff #define ANALOG_GAIN_MIN 0x10 #define ANALOG_GAIN_MAX 0x3e0 #define ANALOG_GAIN_STEP 1 #define ANALOG_GAIN_DEFAULT 0x20 #define OV7251_REG_TEST_PATTERN 0x5e00 #define OV7251_TEST_PATTERN_ENABLE 0x80 #define OV7251_TEST_PATTERN_DISABLE 0x0 #define OV7251_REG_VTS 0x380e #define REG_NULL 0xFFFF #define OV7251_REG_VALUE_08BIT 1 #define OV7251_REG_VALUE_16BIT 2 #define OV7251_REG_VALUE_24BIT 3 #define OV7251_NAME "ov7251" static const char * const ov7251_supply_names[] = { "avdd", /* Analog power */ "dovdd", /* Digital I/O power */ "dvdd", /* Digital core power not needed*/ }; #define OV7251_NUM_SUPPLIES ARRAY_SIZE(ov7251_supply_names) struct regval { u16 addr; u8 val; }; struct ov7251_mode { u32 width; u32 height; u32 max_fps; u32 hts_def; u32 vts_def; u32 exp_def; const struct regval *reg_list; }; struct ov7251 { struct i2c_client *client; struct clk *xvclk; struct gpio_desc *reset_gpio; struct gpio_desc *pwdn_gpio; struct regulator_bulk_data supplies[OV7251_NUM_SUPPLIES]; struct v4l2_subdev subdev; struct media_pad pad; struct v4l2_ctrl_handler ctrl_handler; struct v4l2_ctrl *exposure; struct v4l2_ctrl *anal_gain; struct v4l2_ctrl *digi_gain; struct v4l2_ctrl *hblank; struct v4l2_ctrl *vblank; struct v4l2_ctrl *test_pattern; struct mutex mutex; bool streaming; const struct ov7251_mode *cur_mode; u32 module_index; const char *module_facing; const char *module_name; const char *len_name; }; #define to_ov7251(sd) container_of(sd, struct ov7251, subdev) /* * Xclk 24Mhz * Pclk 48Mhz * PCLK = HTS * VTS * FPS * linelength 928(0x3a0) * framelength 1720(0x6b8) * grabwindow_width 640 * grabwindow_height 480 * max_framerate 30fps * mipi_datarate per lane 640Mbps */ static const struct regval ov7251_640x480_regs[] = { {0x0100, 0x00}, {0x0103, 0x01}, {0x3001, 0x62}, {0x3005, 0x00}, {0x3012, 0xc0}, {0x3013, 0xd2}, {0x3014, 0x04}, {0x3016, 0x10}, {0x3017, 0x00}, {0x3018, 0x00}, {0x301a, 0x00}, {0x301b, 0x00}, {0x301c, 0x20}, {0x3023, 0x05}, {0x3037, 0xf0}, {0x3098, 0x04}, {0x3099, 0x28}, {0x309a, 0x05}, {0x309b, 0x04}, {0x30b0, 0x0a}, {0x30b1, 0x01}, {0x30b3, 0x64}, {0x30b4, 0x03}, {0x30b5, 0x05}, {0x3106, 0xda}, {0x3500, 0x00}, {0x3501, 0x1f}, {0x3502, 0x80}, {0x3503, 0x07}, {0x3509, 0x10}, {0x350b, 0x10}, {0x3600, 0x1c}, {0x3602, 0x62}, {0x3620, 0xb7}, {0x3622, 0x04}, {0x3626, 0x21}, {0x3627, 0x30}, {0x3630, 0x44}, {0x3631, 0x35}, {0x3634, 0x60}, {0x3636, 0x00}, {0x3662, 0x01}, {0x3663, 0x70}, {0x3664, 0xf0}, {0x3666, 0x0a}, {0x3669, 0x1a}, {0x366a, 0x00}, {0x366b, 0x50}, {0x3673, 0x01}, {0x3674, 0xff}, {0x3675, 0x03}, {0x3705, 0xc1}, {0x3709, 0x40}, {0x373c, 0x08}, {0x3742, 0x00}, {0x3757, 0xb3}, {0x3788, 0x00}, {0x37a8, 0x01}, {0x37a9, 0xc0}, {0x3800, 0x00}, {0x3801, 0x04}, {0x3802, 0x00}, {0x3803, 0x04}, {0x3804, 0x02}, {0x3805, 0x8b}, {0x3806, 0x01}, {0x3807, 0xeb}, {0x3808, 0x02}, {0x3809, 0x80}, {0x380a, 0x01}, {0x380b, 0xe0}, {0x380c, 0x03}, {0x380d, 0xa0}, {0x380e, 0x06}, {0x380f, 0xb8}, {0x3810, 0x00}, {0x3811, 0x02}, {0x3812, 0x00}, {0x3813, 0x02}, {0x3814, 0x11}, {0x3815, 0x11}, {0x3820, 0x40}, {0x3821, 0x00}, {0x382f, 0x0e}, {0x3832, 0x00}, {0x3833, 0x05}, {0x3834, 0x00}, {0x3835, 0x0c}, {0x3837, 0x00}, {0x3b80, 0x00}, {0x3b81, 0xa5}, {0x3b82, 0x10}, {0x3b83, 0x00}, {0x3b84, 0x08}, {0x3b85, 0x00}, {0x3b86, 0x01}, {0x3b87, 0x00}, {0x3b88, 0x00}, {0x3b89, 0x00}, {0x3b8a, 0x00}, {0x3b8b, 0x05}, {0x3b8c, 0x00}, {0x3b8d, 0x00}, {0x3b8e, 0x00}, {0x3b8f, 0x1a}, {0x3b94, 0x05}, {0x3b95, 0xf2}, {0x3b96, 0x40}, {0x3c00, 0x89}, {0x3c01, 0x63}, {0x3c02, 0x01}, {0x3c03, 0x00}, {0x3c04, 0x00}, {0x3c05, 0x03}, {0x3c06, 0x00}, {0x3c07, 0x06}, {0x3c0c, 0x01}, {0x3c0d, 0xd0}, {0x3c0e, 0x02}, {0x3c0f, 0x04}, {0x4001, 0x42}, {0x4004, 0x04}, {0x4005, 0x00}, {0x404e, 0x01}, {0x4241, 0x00}, {0x4242, 0x00}, {0x4300, 0xff}, {0x4301, 0x00}, {0x4501, 0x48}, {0x4600, 0x00}, {0x4601, 0x4e}, {0x4801, 0x0f}, {0x4806, 0x0f}, {0x4819, 0xaa}, {0x4823, 0x3e}, {0x4837, 0x19}, {0x4a0d, 0x00}, {0x4a47, 0x7f}, {0x4a49, 0xf0}, {0x4a4b, 0x30}, {0x5000, 0x85}, {0x5001, 0x80}, {REG_NULL, 0x00}, }; static const struct ov7251_mode supported_modes[] = { { .width = 640, .height = 480, .max_fps = 30, .exp_def = 0x061c, .hts_def = 0x03a0, .vts_def = 0x06b8, .reg_list = ov7251_640x480_regs, }, }; #define OV7251_LINK_FREQ_320MHZ 320000000 static const s64 link_freq_menu_items[] = { OV7251_LINK_FREQ_320MHZ }; static const char * const ov7251_test_pattern_menu[] = { "Disabled", "Vertical Color Bar", }; /* Write registers up to 4 at a time */ static int ov7251_write_reg(struct i2c_client *client, u16 reg, int len, u32 val) { u32 buf_i, val_i; u8 buf[6]; u8 *val_p; __be32 val_be; usleep_range(1500, 1600); if (len > 4) return -EINVAL; buf[0] = reg >> 8; buf[1] = reg & 0xff; val_be = cpu_to_be32(val); val_p = (u8 *)&val_be; buf_i = 2; val_i = 4 - len; while (val_i < 4) buf[buf_i++] = val_p[val_i++]; if (i2c_master_send(client, buf, len + 2) != len + 2) return -EIO; return 0; } static int ov7251_write_array(struct i2c_client *client, const struct regval *regs) { u32 i; int ret = 0; for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++) ret = ov7251_write_reg(client, regs[i].addr, OV7251_REG_VALUE_08BIT, regs[i].val); return ret; } /* Read registers up to 4 at a time */ static int ov7251_read_reg(struct i2c_client *client, u16 reg, unsigned int len, u32 *val) { struct i2c_msg msgs[2]; u8 *data_be_p; __be32 data_be = 0; __be16 reg_addr_be = cpu_to_be16(reg); int ret; if (len > 4 || !len) return -EINVAL; data_be_p = (u8 *)&data_be; /* Write register address */ msgs[0].addr = client->addr; msgs[0].flags = 0; msgs[0].len = 2; msgs[0].buf = (u8 *)®_addr_be; /* Read data from register */ msgs[1].addr = client->addr; msgs[1].flags = I2C_M_RD; msgs[1].len = len; msgs[1].buf = &data_be_p[4 - len]; ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); if (ret != ARRAY_SIZE(msgs)) return -EIO; *val = be32_to_cpu(data_be); return 0; } static int ov7251_get_reso_dist(const struct ov7251_mode *mode, struct v4l2_mbus_framefmt *framefmt) { return abs(mode->width - framefmt->width) + abs(mode->height - framefmt->height); } static const struct ov7251_mode * ov7251_find_best_fit(struct v4l2_subdev_format *fmt) { struct v4l2_mbus_framefmt *framefmt = &fmt->format; int dist; int cur_best_fit = 0; int cur_best_fit_dist = -1; size_t i; for (i = 0; i < ARRAY_SIZE(supported_modes); i++) { dist = ov7251_get_reso_dist(&supported_modes[i], framefmt); if (cur_best_fit_dist == -1 || dist < cur_best_fit_dist) { cur_best_fit_dist = dist; cur_best_fit = i; } } return &supported_modes[cur_best_fit]; } static int ov7251_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *fmt) { struct ov7251 *ov7251 = to_ov7251(sd); const struct ov7251_mode *mode; s64 h_blank, vblank_def; mutex_lock(&ov7251->mutex); mode = ov7251_find_best_fit(fmt); fmt->format.code = MEDIA_BUS_FMT_Y10_1X10; fmt->format.width = mode->width; fmt->format.height = mode->height; fmt->format.field = V4L2_FIELD_NONE; if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format; #else mutex_unlock(&ov7251->mutex); return -ENOTTY; #endif } else { ov7251->cur_mode = mode; h_blank = mode->hts_def - mode->width; __v4l2_ctrl_modify_range(ov7251->hblank, h_blank, h_blank, 1, h_blank); vblank_def = mode->vts_def - mode->height; __v4l2_ctrl_modify_range(ov7251->vblank, vblank_def, OV7251_VTS_MAX - mode->height, 1, vblank_def); } mutex_unlock(&ov7251->mutex); return 0; } static int ov7251_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *fmt) { struct ov7251 *ov7251 = to_ov7251(sd); const struct ov7251_mode *mode = ov7251->cur_mode; mutex_lock(&ov7251->mutex); if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API fmt->format = *v4l2_subdev_get_try_format(sd, cfg, fmt->pad); #else mutex_unlock(&ov7251->mutex); return -ENOTTY; #endif } else { fmt->format.width = mode->width; fmt->format.height = mode->height; fmt->format.code = MEDIA_BUS_FMT_Y10_1X10; fmt->format.field = V4L2_FIELD_NONE; } mutex_unlock(&ov7251->mutex); return 0; } static int ov7251_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_mbus_code_enum *code) { if (code->index != 0) return -EINVAL; code->code = MEDIA_BUS_FMT_Y10_1X10; return 0; } static int ov7251_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)) return -EINVAL; if (fse->code != MEDIA_BUS_FMT_Y10_1X10) 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 ov7251_enable_test_pattern(struct ov7251 *ov7251, u32 pattern) { u32 val; if (pattern) val = (pattern - 1) | OV7251_TEST_PATTERN_ENABLE; else val = OV7251_TEST_PATTERN_DISABLE; return ov7251_write_reg(ov7251->client, OV7251_REG_TEST_PATTERN, OV7251_REG_VALUE_08BIT, val); } static int ov7251_g_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_frame_interval *fi) { struct ov7251 *ov7251 = to_ov7251(sd); const struct ov7251_mode *mode = ov7251->cur_mode; mutex_lock(&ov7251->mutex); fi->interval.numerator = 10000; fi->interval.denominator = mode->max_fps * 10000; mutex_unlock(&ov7251->mutex); return 0; } static void ov7251_get_module_inf(struct ov7251 *ov7251, struct rkmodule_inf *inf) { memset(inf, 0, sizeof(*inf)); strlcpy(inf->base.sensor, OV7251_NAME, sizeof(inf->base.sensor)); strlcpy(inf->base.module, ov7251->module_name, sizeof(inf->base.module)); strlcpy(inf->base.lens, ov7251->len_name, sizeof(inf->base.lens)); } static long ov7251_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg) { struct ov7251 *ov7251 = to_ov7251(sd); long ret = 0; switch (cmd) { case RKMODULE_GET_MODULE_INFO: ov7251_get_module_inf(ov7251, (struct rkmodule_inf *)arg); break; default: ret = -ENOTTY; break; } return ret; } #ifdef CONFIG_COMPAT static long ov7251_compat_ioctl32(struct v4l2_subdev *sd, unsigned int cmd, unsigned long arg) { void __user *up = compat_ptr(arg); struct rkmodule_inf *inf; struct rkmodule_awb_cfg *cfg; long ret; switch (cmd) { case RKMODULE_GET_MODULE_INFO: inf = kzalloc(sizeof(*inf), GFP_KERNEL); if (!inf) { ret = -ENOMEM; return ret; } ret = ov7251_ioctl(sd, cmd, inf); if (!ret) ret = copy_to_user(up, inf, sizeof(*inf)); kfree(inf); break; case RKMODULE_AWB_CFG: cfg = kzalloc(sizeof(*cfg), GFP_KERNEL); if (!cfg) { ret = -ENOMEM; return ret; } ret = copy_from_user(cfg, up, sizeof(*cfg)); if (!ret) ret = ov7251_ioctl(sd, cmd, cfg); kfree(cfg); break; default: ret = -ENOIOCTLCMD; break; } return ret; } #endif static int __ov7251_start_stream(struct ov7251 *ov7251) { int ret; ret = ov7251_write_array(ov7251->client, ov7251->cur_mode->reg_list); if (ret) return ret; /* In case these controls are set before streaming */ mutex_unlock(&ov7251->mutex); ret = v4l2_ctrl_handler_setup(&ov7251->ctrl_handler); mutex_lock(&ov7251->mutex); if (ret) return ret; return ov7251_write_reg(ov7251->client, OV7251_REG_CTRL_MODE, OV7251_REG_VALUE_08BIT, OV7251_MODE_STREAMING); } static int __ov7251_stop_stream(struct ov7251 *ov7251) { return ov7251_write_reg(ov7251->client, OV7251_REG_CTRL_MODE, OV7251_REG_VALUE_08BIT, OV7251_MODE_SW_STANDBY); } static int ov7251_s_stream(struct v4l2_subdev *sd, int on) { struct ov7251 *ov7251 = to_ov7251(sd); struct i2c_client *client = ov7251->client; int ret = 0; mutex_lock(&ov7251->mutex); on = !!on; if (on == ov7251->streaming) 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 = __ov7251_start_stream(ov7251); if (ret) { v4l2_err(sd, "start stream failed while write regs\n"); pm_runtime_put(&client->dev); goto unlock_and_return; } usleep_range(10 * 1000, 12 * 1000); } else { __ov7251_stop_stream(ov7251); pm_runtime_put(&client->dev); } ov7251->streaming = on; unlock_and_return: mutex_unlock(&ov7251->mutex); return ret; } /* Calculate the delay in us by clock rate and clock cycles */ static inline u32 ov7251_cal_delay(u32 cycles) { return DIV_ROUND_UP(cycles, OV7251_XVCLK_FREQ / 1000 / 1000); } static int __ov7251_power_on(struct ov7251 *ov7251) { int ret; u32 delay_us; struct device *dev = &ov7251->client->dev; ret = clk_prepare_enable(ov7251->xvclk); if (ret < 0) { dev_err(dev, "Failed to enable xvclk\n"); return ret; } if (!IS_ERR(ov7251->reset_gpio)) gpiod_set_value_cansleep(ov7251->reset_gpio, 1); ret = regulator_bulk_enable(OV7251_NUM_SUPPLIES, ov7251->supplies); if (ret < 0) { dev_err(dev, "Failed to enable regulators\n"); goto disable_clk; } usleep_range(1000, 1100); if (!IS_ERR(ov7251->reset_gpio)) gpiod_set_value_cansleep(ov7251->reset_gpio, 0); if (!IS_ERR(ov7251->pwdn_gpio)) gpiod_set_value_cansleep(ov7251->pwdn_gpio, 1); /* 8192 cycles prior to first SCCB transaction */ delay_us = ov7251_cal_delay(8192); usleep_range(delay_us, delay_us * 2); return 0; disable_clk: clk_disable_unprepare(ov7251->xvclk); return ret; } static void __ov7251_power_off(struct ov7251 *ov7251) { if (!IS_ERR(ov7251->pwdn_gpio)) gpiod_set_value_cansleep(ov7251->pwdn_gpio, 0); clk_disable_unprepare(ov7251->xvclk); if (!IS_ERR(ov7251->reset_gpio)) gpiod_set_value_cansleep(ov7251->reset_gpio, 1); regulator_bulk_disable(OV7251_NUM_SUPPLIES, ov7251->supplies); } static int ov7251_runtime_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); struct ov7251 *ov7251 = to_ov7251(sd); return __ov7251_power_on(ov7251); } static int ov7251_runtime_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); struct ov7251 *ov7251 = to_ov7251(sd); __ov7251_power_off(ov7251); return 0; } #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API static int ov7251_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) { struct ov7251 *ov7251 = to_ov7251(sd); struct v4l2_mbus_framefmt *try_fmt = v4l2_subdev_get_try_format(sd, fh->pad, 0); const struct ov7251_mode *def_mode = &supported_modes[0]; mutex_lock(&ov7251->mutex); /* Initialize try_fmt */ try_fmt->width = def_mode->width; try_fmt->height = def_mode->height; try_fmt->code = MEDIA_BUS_FMT_Y10_1X10; try_fmt->field = V4L2_FIELD_NONE; mutex_unlock(&ov7251->mutex); /* No crop or compose */ return 0; } #endif static const struct dev_pm_ops ov7251_pm_ops = { SET_RUNTIME_PM_OPS(ov7251_runtime_suspend, ov7251_runtime_resume, NULL) }; #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API static const struct v4l2_subdev_internal_ops ov7251_internal_ops = { .open = ov7251_open, }; #endif static const struct v4l2_subdev_core_ops ov7251_core_ops = { .ioctl = ov7251_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl32 = ov7251_compat_ioctl32, #endif }; static const struct v4l2_subdev_video_ops ov7251_video_ops = { .s_stream = ov7251_s_stream, .g_frame_interval = ov7251_g_frame_interval, }; static const struct v4l2_subdev_pad_ops ov7251_pad_ops = { .enum_mbus_code = ov7251_enum_mbus_code, .enum_frame_size = ov7251_enum_frame_sizes, .get_fmt = ov7251_get_fmt, .set_fmt = ov7251_set_fmt, }; static const struct v4l2_subdev_ops ov7251_subdev_ops = { .core = &ov7251_core_ops, .video = &ov7251_video_ops, .pad = &ov7251_pad_ops, }; static int ov7251_set_ctrl(struct v4l2_ctrl *ctrl) { struct ov7251 *ov7251 = container_of(ctrl->handler, struct ov7251, ctrl_handler); struct i2c_client *client = ov7251->client; s64 max; int ret = 0; /* Propagate change of current control to all related controls */ switch (ctrl->id) { case V4L2_CID_VBLANK: /* Update max exposure while meeting expected vblanking */ max = ov7251->cur_mode->height + ctrl->val - 20; __v4l2_ctrl_modify_range(ov7251->exposure, ov7251->exposure->minimum, max, ov7251->exposure->step, ov7251->exposure->default_value); break; } if (pm_runtime_get(&client->dev) <= 0) return 0; switch (ctrl->id) { case V4L2_CID_EXPOSURE: /* 4 least significant bits of expsoure are fractional part */ ret = ov7251_write_reg(ov7251->client, OV7251_REG_EXPOSURE, OV7251_REG_VALUE_24BIT, ctrl->val << 4); break; case V4L2_CID_ANALOGUE_GAIN: ret = ov7251_write_reg(ov7251->client, OV7251_REG_ANALOG_GAIN, OV7251_REG_VALUE_16BIT, ctrl->val & ANALOG_GAIN_MASK); break; case V4L2_CID_VBLANK: ret = ov7251_write_reg(ov7251->client, OV7251_REG_VTS, OV7251_REG_VALUE_16BIT, ctrl->val + ov7251->cur_mode->height); break; case V4L2_CID_TEST_PATTERN: ret = ov7251_enable_test_pattern(ov7251, ctrl->val); break; default: dev_warn(&client->dev, "%s Unhandled id:0x%x, val:0x%x\n", __func__, ctrl->id, ctrl->val); break; } pm_runtime_put(&client->dev); return ret; } static const struct v4l2_ctrl_ops ov7251_ctrl_ops = { .s_ctrl = ov7251_set_ctrl, }; static int ov7251_initialize_controls(struct ov7251 *ov7251) { const struct ov7251_mode *mode; struct v4l2_ctrl_handler *handler; struct v4l2_ctrl *ctrl; s64 exposure_max, vblank_def; u32 h_blank; int ret; handler = &ov7251->ctrl_handler; mode = ov7251->cur_mode; ret = v4l2_ctrl_handler_init(handler, 8); if (ret) return ret; handler->lock = &ov7251->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; v4l2_ctrl_new_std(handler, NULL, V4L2_CID_PIXEL_RATE, 0, OV7251_PIXEL_RATE, 1, OV7251_PIXEL_RATE); h_blank = mode->hts_def - mode->width; ov7251->hblank = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK, h_blank, h_blank, 1, h_blank); if (ov7251->hblank) ov7251->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; vblank_def = mode->vts_def - mode->height; ov7251->vblank = v4l2_ctrl_new_std(handler, &ov7251_ctrl_ops, V4L2_CID_VBLANK, vblank_def, OV7251_VTS_MAX - mode->height, 1, vblank_def); exposure_max = mode->vts_def - 20; ov7251->exposure = v4l2_ctrl_new_std(handler, &ov7251_ctrl_ops, V4L2_CID_EXPOSURE, OV7251_EXPOSURE_MIN, exposure_max, OV7251_EXPOSURE_STEP, mode->exp_def); ov7251->anal_gain = v4l2_ctrl_new_std(handler, &ov7251_ctrl_ops, V4L2_CID_ANALOGUE_GAIN, ANALOG_GAIN_MIN, ANALOG_GAIN_MAX, ANALOG_GAIN_STEP, ANALOG_GAIN_DEFAULT); ov7251->test_pattern = v4l2_ctrl_new_std_menu_items(handler, &ov7251_ctrl_ops, V4L2_CID_TEST_PATTERN, ARRAY_SIZE(ov7251_test_pattern_menu) - 1, 0, 0, ov7251_test_pattern_menu); if (handler->error) { ret = handler->error; dev_err(&ov7251->client->dev, "Failed to init controls(%d)\n", ret); goto err_free_handler; } ov7251->subdev.ctrl_handler = handler; return 0; err_free_handler: v4l2_ctrl_handler_free(handler); return ret; } static int ov7251_check_sensor_id(struct ov7251 *ov7251, struct i2c_client *client) { struct device *dev = &ov7251->client->dev; u32 id = 0; int ret; ret = ov7251_read_reg(client, OV7251_REG_CHIP_ID, OV7251_REG_VALUE_16BIT, &id); if (id != CHIP_ID) { dev_err(dev, "Unexpected sensor id(%06x), ret(%d)\n", id, ret); return ret; } dev_info(dev, "Detected OV%06x sensor\n", CHIP_ID); return 0; } static int ov7251_configure_regulators(struct ov7251 *ov7251) { size_t i; for (i = 0; i < OV7251_NUM_SUPPLIES; i++) ov7251->supplies[i].supply = ov7251_supply_names[i]; return devm_regulator_bulk_get(&ov7251->client->dev, OV7251_NUM_SUPPLIES, ov7251->supplies); } static int ov7251_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct device *dev = &client->dev; struct device_node *node = dev->of_node; struct ov7251 *ov7251; struct v4l2_subdev *sd; char facing[2]; int ret; ov7251 = devm_kzalloc(dev, sizeof(*ov7251), GFP_KERNEL); if (!ov7251) return -ENOMEM; ret = of_property_read_u32(node, RKMODULE_CAMERA_MODULE_INDEX, &ov7251->module_index); ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_FACING, &ov7251->module_facing); ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_NAME, &ov7251->module_name); ret |= of_property_read_string(node, RKMODULE_CAMERA_LENS_NAME, &ov7251->len_name); if (ret) { dev_err(dev, "could not get module information!\n"); return -EINVAL; } ov7251->client = client; ov7251->cur_mode = &supported_modes[0]; ov7251->xvclk = devm_clk_get(dev, "xvclk"); if (IS_ERR(ov7251->xvclk)) { dev_err(dev, "Failed to get xvclk\n"); return -EINVAL; } ret = clk_set_rate(ov7251->xvclk, OV7251_XVCLK_FREQ); if (ret < 0) { dev_err(dev, "Failed to set xvclk rate (24MHz)\n"); return ret; } if (clk_get_rate(ov7251->xvclk) != OV7251_XVCLK_FREQ) dev_warn(dev, "xvclk mismatched, modes are based on 24MHz\n"); ov7251->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); if (IS_ERR(ov7251->reset_gpio)) dev_warn(dev, "Failed to get reset-gpios\n"); ov7251->pwdn_gpio = devm_gpiod_get(dev, "pwdn", GPIOD_OUT_LOW); if (IS_ERR(ov7251->pwdn_gpio)) dev_warn(dev, "Failed to get pwdn-gpios\n"); ret = ov7251_configure_regulators(ov7251); if (ret) { dev_err(dev, "Failed to get power regulators\n"); return ret; } mutex_init(&ov7251->mutex); sd = &ov7251->subdev; v4l2_i2c_subdev_init(sd, client, &ov7251_subdev_ops); ret = ov7251_initialize_controls(ov7251); if (ret) goto err_destroy_mutex; ret = __ov7251_power_on(ov7251); if (ret) goto err_free_handler; ret = ov7251_check_sensor_id(ov7251, client); if (ret) goto err_power_off; #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API sd->internal_ops = &ov7251_internal_ops; sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; #endif #if defined(CONFIG_MEDIA_CONTROLLER) ov7251->pad.flags = MEDIA_PAD_FL_SOURCE; sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV_SENSOR; ret = media_entity_init(&sd->entity, 1, &ov7251->pad, 0); if (ret < 0) goto err_power_off; #endif memset(facing, 0, sizeof(facing)); if (strcmp(ov7251->module_facing, "back") == 0) facing[0] = 'b'; else facing[0] = 'f'; snprintf(sd->name, sizeof(sd->name), "m%02d_%s_%s %s", ov7251->module_index, facing, OV7251_NAME, dev_name(sd->dev)); ret = v4l2_async_register_subdev_sensor_common(sd); if (ret) { dev_err(dev, "v4l2 async register subdev failed\n"); goto err_clean_entity; } pm_runtime_set_active(dev); pm_runtime_enable(dev); pm_runtime_idle(dev); return 0; err_clean_entity: #if defined(CONFIG_MEDIA_CONTROLLER) media_entity_cleanup(&sd->entity); #endif err_power_off: __ov7251_power_off(ov7251); err_free_handler: v4l2_ctrl_handler_free(&ov7251->ctrl_handler); err_destroy_mutex: mutex_destroy(&ov7251->mutex); return ret; } static int ov7251_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); struct ov7251 *ov7251 = to_ov7251(sd); v4l2_async_unregister_subdev(sd); #if defined(CONFIG_MEDIA_CONTROLLER) media_entity_cleanup(&sd->entity); #endif v4l2_ctrl_handler_free(&ov7251->ctrl_handler); mutex_destroy(&ov7251->mutex); pm_runtime_disable(&client->dev); if (!pm_runtime_status_suspended(&client->dev)) __ov7251_power_off(ov7251); pm_runtime_set_suspended(&client->dev); return 0; } #if IS_ENABLED(CONFIG_OF) static const struct of_device_id ov7251_of_match[] = { { .compatible = "ovti,ov7251" }, {}, }; MODULE_DEVICE_TABLE(of, ov7251_of_match); #endif static const struct i2c_device_id ov7251_match_id[] = { { "ovti,ov7251", 0 }, { }, }; static struct i2c_driver ov7251_i2c_driver = { .driver = { .name = OV7251_NAME, .pm = &ov7251_pm_ops, .of_match_table = of_match_ptr(ov7251_of_match), }, .probe = &ov7251_probe, .remove = &ov7251_remove, .id_table = ov7251_match_id, }; static int __init sensor_mod_init(void) { return i2c_add_driver(&ov7251_i2c_driver); } static void __exit sensor_mod_exit(void) { i2c_del_driver(&ov7251_i2c_driver); } device_initcall_sync(sensor_mod_init); module_exit(sensor_mod_exit); MODULE_DESCRIPTION("OmniVision ov7251 sensor driver"); MODULE_LICENSE("GPL v2");