// SPDX-License-Identifier: GPL-2.0 /* * Support for OmniVision OV2680 1080p HD camera sensor. * * Copyright (c) 2013 Intel Corporation. All Rights Reserved. * Copyright (c) 2023 Hans de Goede * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License version * 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * */ #include #include #include #include #include #include #include #include #include #include #include "ov2680.h" static const struct v4l2_rect ov2680_default_crop = { .left = OV2680_ACTIVE_START_LEFT, .top = OV2680_ACTIVE_START_TOP, .width = OV2680_ACTIVE_WIDTH, .height = OV2680_ACTIVE_HEIGHT, }; static int ov2680_write_reg_array(struct i2c_client *client, const struct ov2680_reg *reglist) { const struct ov2680_reg *next = reglist; int ret; for (; next->reg != 0; next++) { ret = ov_write_reg8(client, next->reg, next->val); if (ret) return ret; } return 0; } static void ov2680_set_bayer_order(struct ov2680_dev *sensor, struct v4l2_mbus_framefmt *fmt) { static const int ov2680_hv_flip_bayer_order[] = { MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SRGGB10_1X10, }; int hv_flip = 0; if (sensor->ctrls.vflip->val) hv_flip += 1; if (sensor->ctrls.hflip->val) hv_flip += 2; fmt->code = ov2680_hv_flip_bayer_order[hv_flip]; } static int ov2680_set_vflip(struct ov2680_dev *sensor, s32 val) { int ret; if (sensor->is_streaming) return -EBUSY; ret = ov_update_reg(sensor->client, OV2680_REG_FORMAT1, BIT(2), val ? BIT(2) : 0); if (ret < 0) return ret; ov2680_set_bayer_order(sensor, &sensor->mode.fmt); return 0; } static int ov2680_set_hflip(struct ov2680_dev *sensor, s32 val) { int ret; if (sensor->is_streaming) return -EBUSY; ret = ov_update_reg(sensor->client, OV2680_REG_FORMAT2, BIT(2), val ? BIT(2) : 0); if (ret < 0) return ret; ov2680_set_bayer_order(sensor, &sensor->mode.fmt); return 0; } static int ov2680_exposure_set(struct ov2680_dev *sensor, u32 exp) { return ov_write_reg24(sensor->client, OV2680_REG_EXPOSURE_PK_HIGH, exp << 4); } static int ov2680_gain_set(struct ov2680_dev *sensor, u32 gain) { return ov_write_reg16(sensor->client, OV2680_REG_GAIN_PK, gain); } static int ov2680_test_pattern_set(struct ov2680_dev *sensor, int value) { int ret; if (!value) return ov_update_reg(sensor->client, OV2680_REG_ISP_CTRL00, BIT(7), 0); ret = ov_update_reg(sensor->client, OV2680_REG_ISP_CTRL00, 0x03, value - 1); if (ret < 0) return ret; ret = ov_update_reg(sensor->client, OV2680_REG_ISP_CTRL00, BIT(7), BIT(7)); if (ret < 0) return ret; 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_sensor(sd); int ret; /* Only apply changes to the controls if the device is powered up */ if (!pm_runtime_get_if_in_use(sensor->sd.dev)) { ov2680_set_bayer_order(sensor, &sensor->mode.fmt); return 0; } switch (ctrl->id) { case V4L2_CID_VFLIP: ret = ov2680_set_vflip(sensor, ctrl->val); break; case V4L2_CID_HFLIP: ret = ov2680_set_hflip(sensor, ctrl->val); break; case V4L2_CID_EXPOSURE: ret = ov2680_exposure_set(sensor, ctrl->val); break; case V4L2_CID_GAIN: ret = ov2680_gain_set(sensor, ctrl->val); break; case V4L2_CID_TEST_PATTERN: ret = ov2680_test_pattern_set(sensor, ctrl->val); break; default: ret = -EINVAL; } pm_runtime_put(sensor->sd.dev); return ret; } static const struct v4l2_ctrl_ops ov2680_ctrl_ops = { .s_ctrl = ov2680_s_ctrl, }; static int ov2680_init_registers(struct v4l2_subdev *sd) { struct i2c_client *client = v4l2_get_subdevdata(sd); int ret; ret = ov_write_reg8(client, OV2680_SW_RESET, 0x01); /* Wait for sensor reset */ usleep_range(1000, 2000); ret |= ov2680_write_reg_array(client, ov2680_global_setting); return ret; } static struct v4l2_mbus_framefmt * __ov2680_get_pad_format(struct ov2680_dev *sensor, struct v4l2_subdev_state *state, unsigned int pad, enum v4l2_subdev_format_whence which) { if (which == V4L2_SUBDEV_FORMAT_TRY) return v4l2_subdev_get_try_format(&sensor->sd, state, pad); return &sensor->mode.fmt; } static struct v4l2_rect * __ov2680_get_pad_crop(struct ov2680_dev *sensor, struct v4l2_subdev_state *state, unsigned int pad, enum v4l2_subdev_format_whence which) { if (which == V4L2_SUBDEV_FORMAT_TRY) return v4l2_subdev_get_try_crop(&sensor->sd, state, pad); return &sensor->mode.crop; } static void ov2680_fill_format(struct ov2680_dev *sensor, struct v4l2_mbus_framefmt *fmt, unsigned int width, unsigned int height) { memset(fmt, 0, sizeof(*fmt)); fmt->width = width; fmt->height = height; fmt->field = V4L2_FIELD_NONE; ov2680_set_bayer_order(sensor, fmt); } static void ov2680_calc_mode(struct ov2680_dev *sensor) { int width = sensor->mode.fmt.width; int height = sensor->mode.fmt.height; int orig_width = width; int orig_height = height; if (width <= (sensor->mode.crop.width / 2) && height <= (sensor->mode.crop.height / 2)) { sensor->mode.binning = true; width *= 2; height *= 2; } else { sensor->mode.binning = false; } sensor->mode.h_start = (sensor->mode.crop.left + (sensor->mode.crop.width - width) / 2) & ~1; sensor->mode.v_start = (sensor->mode.crop.top + (sensor->mode.crop.height - height) / 2) & ~1; sensor->mode.h_end = min(sensor->mode.h_start + width + OV2680_END_MARGIN - 1, OV2680_NATIVE_WIDTH - 1); sensor->mode.v_end = min(sensor->mode.v_start + height + OV2680_END_MARGIN - 1, OV2680_NATIVE_HEIGHT - 1); sensor->mode.h_output_size = orig_width; sensor->mode.v_output_size = orig_height; sensor->mode.hts = OV2680_PIXELS_PER_LINE; sensor->mode.vts = OV2680_LINES_PER_FRAME; } static int ov2680_set_mode(struct ov2680_dev *sensor) { struct i2c_client *client = sensor->client; u8 sensor_ctrl_0a, inc, fmt1, fmt2; int ret; if (sensor->mode.binning) { sensor_ctrl_0a = 0x23; inc = 0x31; fmt1 = 0xc2; fmt2 = 0x01; } else { sensor_ctrl_0a = 0x21; inc = 0x11; fmt1 = 0xc0; fmt2 = 0x00; } ret = ov_write_reg8(client, OV2680_REG_SENSOR_CTRL_0A, sensor_ctrl_0a); if (ret) return ret; ret = ov_write_reg16(client, OV2680_HORIZONTAL_START_H, sensor->mode.h_start); if (ret) return ret; ret = ov_write_reg16(client, OV2680_VERTICAL_START_H, sensor->mode.v_start); if (ret) return ret; ret = ov_write_reg16(client, OV2680_HORIZONTAL_END_H, sensor->mode.h_end); if (ret) return ret; ret = ov_write_reg16(client, OV2680_VERTICAL_END_H, sensor->mode.v_end); if (ret) return ret; ret = ov_write_reg16(client, OV2680_HORIZONTAL_OUTPUT_SIZE_H, sensor->mode.h_output_size); if (ret) return ret; ret = ov_write_reg16(client, OV2680_VERTICAL_OUTPUT_SIZE_H, sensor->mode.v_output_size); if (ret) return ret; ret = ov_write_reg16(client, OV2680_HTS, sensor->mode.hts); if (ret) return ret; ret = ov_write_reg16(client, OV2680_VTS, sensor->mode.vts); if (ret) return ret; ret = ov_write_reg16(client, OV2680_ISP_X_WIN, 0); if (ret) return ret; ret = ov_write_reg16(client, OV2680_ISP_Y_WIN, 0); if (ret) return ret; ret = ov_write_reg8(client, OV2680_X_INC, inc); if (ret) return ret; ret = ov_write_reg8(client, OV2680_Y_INC, inc); if (ret) return ret; ret = ov_write_reg16(client, OV2680_X_WIN, sensor->mode.h_output_size); if (ret) return ret; ret = ov_write_reg16(client, OV2680_Y_WIN, sensor->mode.v_output_size); if (ret) return ret; ret = ov_write_reg8(client, OV2680_REG_FORMAT1, fmt1); if (ret) return ret; ret = ov_write_reg8(client, OV2680_REG_FORMAT2, fmt2); if (ret) return ret; return 0; } static int ov2680_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *format) { struct ov2680_dev *sensor = to_ov2680_sensor(sd); struct v4l2_mbus_framefmt *fmt; const struct v4l2_rect *crop; unsigned int width, height; crop = __ov2680_get_pad_crop(sensor, sd_state, format->pad, format->which); /* Limit set_fmt max size to crop width / height */ width = clamp_t(unsigned int, ALIGN(format->format.width, 2), OV2680_MIN_CROP_WIDTH, crop->width); height = clamp_t(unsigned int, ALIGN(format->format.height, 2), OV2680_MIN_CROP_HEIGHT, crop->height); fmt = __ov2680_get_pad_format(sensor, sd_state, format->pad, format->which); ov2680_fill_format(sensor, fmt, width, height); format->format = *fmt; if (format->which == V4L2_SUBDEV_FORMAT_TRY) return 0; mutex_lock(&sensor->lock); ov2680_calc_mode(sensor); mutex_unlock(&sensor->lock); return 0; } static int ov2680_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *format) { struct ov2680_dev *sensor = to_ov2680_sensor(sd); struct v4l2_mbus_framefmt *fmt; fmt = __ov2680_get_pad_format(sensor, sd_state, format->pad, format->which); format->format = *fmt; return 0; } static int ov2680_get_selection(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, struct v4l2_subdev_selection *sel) { struct ov2680_dev *sensor = to_ov2680_sensor(sd); switch (sel->target) { case V4L2_SEL_TGT_CROP: mutex_lock(&sensor->lock); sel->r = *__ov2680_get_pad_crop(sensor, state, sel->pad, sel->which); mutex_unlock(&sensor->lock); break; case V4L2_SEL_TGT_NATIVE_SIZE: case V4L2_SEL_TGT_CROP_BOUNDS: sel->r.top = 0; sel->r.left = 0; sel->r.width = OV2680_NATIVE_WIDTH; sel->r.height = OV2680_NATIVE_HEIGHT; break; case V4L2_SEL_TGT_CROP_DEFAULT: sel->r.top = OV2680_ACTIVE_START_TOP; sel->r.left = OV2680_ACTIVE_START_LEFT; sel->r.width = OV2680_ACTIVE_WIDTH; sel->r.height = OV2680_ACTIVE_HEIGHT; break; default: return -EINVAL; } return 0; } static int ov2680_set_selection(struct v4l2_subdev *sd, struct v4l2_subdev_state *state, struct v4l2_subdev_selection *sel) { struct ov2680_dev *sensor = to_ov2680_sensor(sd); struct v4l2_mbus_framefmt *format; struct v4l2_rect *__crop; struct v4l2_rect rect; if (sel->target != V4L2_SEL_TGT_CROP) return -EINVAL; /* * Clamp the boundaries of the crop rectangle to the size of the sensor * pixel array. Align to multiples of 2 to ensure Bayer pattern isn't * disrupted. */ rect.left = clamp(ALIGN(sel->r.left, 2), OV2680_NATIVE_START_LEFT, OV2680_NATIVE_WIDTH); rect.top = clamp(ALIGN(sel->r.top, 2), OV2680_NATIVE_START_TOP, OV2680_NATIVE_HEIGHT); rect.width = clamp_t(unsigned int, ALIGN(sel->r.width, 2), OV2680_MIN_CROP_WIDTH, OV2680_NATIVE_WIDTH); rect.height = clamp_t(unsigned int, ALIGN(sel->r.height, 2), OV2680_MIN_CROP_HEIGHT, OV2680_NATIVE_HEIGHT); /* Make sure the crop rectangle isn't outside the bounds of the array */ rect.width = min_t(unsigned int, rect.width, OV2680_NATIVE_WIDTH - rect.left); rect.height = min_t(unsigned int, rect.height, OV2680_NATIVE_HEIGHT - rect.top); __crop = __ov2680_get_pad_crop(sensor, state, sel->pad, sel->which); if (rect.width != __crop->width || rect.height != __crop->height) { /* * Reset the output image size if the crop rectangle size has * been modified. */ format = __ov2680_get_pad_format(sensor, state, sel->pad, sel->which); format->width = rect.width; format->height = rect.height; } *__crop = rect; sel->r = rect; return 0; } static int ov2680_init_cfg(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state) { struct v4l2_subdev_format fmt = { .which = sd_state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE, .format = { .width = 800, .height = 600, }, }; sd_state->pads[0].try_crop = ov2680_default_crop; return ov2680_set_fmt(sd, sd_state, &fmt); } static int ov2680_detect(struct i2c_client *client) { struct i2c_adapter *adapter = client->adapter; u32 high = 0, low = 0; int ret; u16 id; u8 revision; if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) return -ENODEV; ret = ov_read_reg8(client, OV2680_SC_CMMN_CHIP_ID_H, &high); if (ret) { dev_err(&client->dev, "sensor_id_high read failed (%d)\n", ret); return -ENODEV; } ret = ov_read_reg8(client, OV2680_SC_CMMN_CHIP_ID_L, &low); id = ((((u16)high) << 8) | (u16)low); if (id != OV2680_ID) { dev_err(&client->dev, "sensor ID error 0x%x\n", id); return -ENODEV; } ret = ov_read_reg8(client, OV2680_SC_CMMN_SUB_ID, &high); revision = (u8)high & 0x0f; dev_info(&client->dev, "sensor_revision id = 0x%x, rev= %d\n", id, revision); return 0; } static int ov2680_s_stream(struct v4l2_subdev *sd, int enable) { struct ov2680_dev *sensor = to_ov2680_sensor(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); int ret = 0; mutex_lock(&sensor->lock); if (sensor->is_streaming == enable) { dev_warn(&client->dev, "stream already %s\n", enable ? "started" : "stopped"); goto error_unlock; } if (enable) { ret = pm_runtime_get_sync(sensor->sd.dev); if (ret < 0) goto error_power_down; ret = ov2680_set_mode(sensor); if (ret) goto error_power_down; /* Restore value of all ctrls */ ret = __v4l2_ctrl_handler_setup(&sensor->ctrls.handler); if (ret) goto error_power_down; ret = ov_write_reg8(client, OV2680_SW_STREAM, OV2680_START_STREAMING); if (ret) goto error_power_down; } else { ov_write_reg8(client, OV2680_SW_STREAM, OV2680_STOP_STREAMING); pm_runtime_put(sensor->sd.dev); } sensor->is_streaming = enable; v4l2_ctrl_activate(sensor->ctrls.vflip, !enable); v4l2_ctrl_activate(sensor->ctrls.hflip, !enable); mutex_unlock(&sensor->lock); return 0; error_power_down: pm_runtime_put(sensor->sd.dev); sensor->is_streaming = false; error_unlock: mutex_unlock(&sensor->lock); return ret; } static int ov2680_s_config(struct v4l2_subdev *sd) { struct i2c_client *client = v4l2_get_subdevdata(sd); int ret; ret = pm_runtime_get_sync(&client->dev); if (ret < 0) { dev_err(&client->dev, "ov2680 power-up err.\n"); goto fail_power_on; } /* config & detect sensor */ ret = ov2680_detect(client); if (ret) dev_err(&client->dev, "ov2680_detect err s_config.\n"); fail_power_on: pm_runtime_put(&client->dev); return ret; } static int ov2680_g_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_frame_interval *interval) { interval->interval.numerator = 1; interval->interval.denominator = OV2680_FPS; return 0; } static int ov2680_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_mbus_code_enum *code) { /* We support only a single format */ if (code->index) return -EINVAL; code->code = MEDIA_BUS_FMT_SBGGR10_1X10; return 0; } static int ov2680_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_frame_size_enum *fse) { static const struct v4l2_frmsize_discrete ov2680_frame_sizes[] = { { 1616, 1216 }, { 1616, 1096 }, { 1616, 916 }, { 1456, 1096 }, { 1296, 976 }, { 1296, 736 }, { 784, 592 }, { 656, 496 }, }; int index = fse->index; if (index >= ARRAY_SIZE(ov2680_frame_sizes)) return -EINVAL; fse->min_width = ov2680_frame_sizes[index].width; fse->min_height = ov2680_frame_sizes[index].height; fse->max_width = ov2680_frame_sizes[index].width; fse->max_height = ov2680_frame_sizes[index].height; return 0; } static int ov2680_enum_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_frame_interval_enum *fie) { /* Only 1 framerate */ if (fie->index) return -EINVAL; fie->interval.numerator = 1; fie->interval.denominator = OV2680_FPS; return 0; } static int ov2680_g_skip_frames(struct v4l2_subdev *sd, u32 *frames) { *frames = OV2680_SKIP_FRAMES; return 0; } static const struct v4l2_subdev_video_ops ov2680_video_ops = { .s_stream = ov2680_s_stream, .g_frame_interval = ov2680_g_frame_interval, }; static const struct v4l2_subdev_sensor_ops ov2680_sensor_ops = { .g_skip_frames = ov2680_g_skip_frames, }; static const struct v4l2_subdev_pad_ops ov2680_pad_ops = { .init_cfg = ov2680_init_cfg, .enum_mbus_code = ov2680_enum_mbus_code, .enum_frame_size = ov2680_enum_frame_size, .enum_frame_interval = ov2680_enum_frame_interval, .get_fmt = ov2680_get_fmt, .set_fmt = ov2680_set_fmt, .get_selection = ov2680_get_selection, .set_selection = ov2680_set_selection, }; static const struct v4l2_subdev_ops ov2680_ops = { .video = &ov2680_video_ops, .pad = &ov2680_pad_ops, .sensor = &ov2680_sensor_ops, }; static int ov2680_init_controls(struct ov2680_dev *sensor) { static const char * const test_pattern_menu[] = { "Disabled", "Color Bars", "Random Data", "Square", "Black Image", }; const struct v4l2_ctrl_ops *ops = &ov2680_ctrl_ops; struct ov2680_ctrls *ctrls = &sensor->ctrls; struct v4l2_ctrl_handler *hdl = &ctrls->handler; int exp_max = OV2680_LINES_PER_FRAME - OV2680_INTEGRATION_TIME_MARGIN; v4l2_ctrl_handler_init(hdl, 4); hdl->lock = &sensor->lock; ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0); ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0); ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE, 0, exp_max, 1, exp_max); ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN, 0, 1023, 1, 250); 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->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT; ctrls->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT; if (hdl->error) return hdl->error; sensor->sd.ctrl_handler = hdl; return 0; } static void ov2680_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); struct ov2680_dev *sensor = to_ov2680_sensor(sd); dev_dbg(&client->dev, "ov2680_remove...\n"); v4l2_async_unregister_subdev(&sensor->sd); media_entity_cleanup(&sensor->sd.entity); v4l2_ctrl_handler_free(&sensor->ctrls.handler); mutex_destroy(&sensor->lock); fwnode_handle_put(sensor->ep_fwnode); pm_runtime_disable(&client->dev); } static int ov2680_probe(struct i2c_client *client) { struct device *dev = &client->dev; struct ov2680_dev *sensor; int ret; sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL); if (!sensor) return -ENOMEM; mutex_init(&sensor->lock); sensor->client = client; v4l2_i2c_subdev_init(&sensor->sd, client, &ov2680_ops); /* * Sometimes the fwnode graph is initialized by the bridge driver. * Bridge drivers doing this may also add GPIO mappings, wait for this. */ sensor->ep_fwnode = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL); if (!sensor->ep_fwnode) return dev_err_probe(dev, -EPROBE_DEFER, "waiting for fwnode graph endpoint\n"); sensor->powerdown = devm_gpiod_get_optional(dev, "powerdown", GPIOD_OUT_HIGH); if (IS_ERR(sensor->powerdown)) { fwnode_handle_put(sensor->ep_fwnode); return dev_err_probe(dev, PTR_ERR(sensor->powerdown), "getting powerdown GPIO\n"); } pm_runtime_set_suspended(dev); pm_runtime_enable(dev); pm_runtime_set_autosuspend_delay(dev, 1000); pm_runtime_use_autosuspend(dev); ret = ov2680_s_config(&sensor->sd); if (ret) { ov2680_remove(client); return ret; } sensor->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; sensor->pad.flags = MEDIA_PAD_FL_SOURCE; sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; sensor->sd.fwnode = sensor->ep_fwnode; ret = ov2680_init_controls(sensor); if (ret) { ov2680_remove(client); return ret; } ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad); if (ret) { ov2680_remove(client); return ret; } sensor->mode.crop = ov2680_default_crop; ov2680_fill_format(sensor, &sensor->mode.fmt, OV2680_NATIVE_WIDTH, OV2680_NATIVE_HEIGHT); ov2680_calc_mode(sensor); ret = v4l2_async_register_subdev_sensor(&sensor->sd); if (ret) { ov2680_remove(client); return ret; } return 0; } static int ov2680_suspend(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct ov2680_dev *sensor = to_ov2680_sensor(sd); gpiod_set_value_cansleep(sensor->powerdown, 1); return 0; } static int ov2680_resume(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct ov2680_dev *sensor = to_ov2680_sensor(sd); /* according to DS, at least 5ms is needed after DOVDD (enabled by ACPI) */ usleep_range(5000, 6000); gpiod_set_value_cansleep(sensor->powerdown, 0); /* according to DS, 20ms is needed between PWDN and i2c access */ msleep(20); ov2680_init_registers(sd); return 0; } static DEFINE_RUNTIME_DEV_PM_OPS(ov2680_pm_ops, ov2680_suspend, ov2680_resume, NULL); static const struct acpi_device_id ov2680_acpi_match[] = { {"XXOV2680"}, {"OVTI2680"}, {}, }; MODULE_DEVICE_TABLE(acpi, ov2680_acpi_match); static struct i2c_driver ov2680_driver = { .driver = { .name = "ov2680", .pm = pm_sleep_ptr(&ov2680_pm_ops), .acpi_match_table = ov2680_acpi_match, }, .probe = ov2680_probe, .remove = ov2680_remove, }; module_i2c_driver(ov2680_driver); MODULE_AUTHOR("Jacky Wang "); MODULE_DESCRIPTION("A low-level driver for OmniVision 2680 sensors"); MODULE_LICENSE("GPL");