| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Laurent Pinchart | 7498 | 60.79% | 55 | 41.67% |
| Ricardo Ribalda Delgado | 2098 | 17.01% | 31 | 23.48% |
| Hans de Goede | 1269 | 10.29% | 9 | 6.82% |
| Guennadi Liakhovetski | 437 | 3.54% | 1 | 0.76% |
| Martin Rubli | 260 | 2.11% | 3 | 2.27% |
| Vincent Palatin | 233 | 1.89% | 1 | 0.76% |
| Hans Verkuil | 168 | 1.36% | 4 | 3.03% |
| Yunke Cao | 90 | 0.73% | 1 | 0.76% |
| Edgar Thier | 76 | 0.62% | 1 | 0.76% |
| Joe Perches | 39 | 0.32% | 2 | 1.52% |
| Márton Németh | 39 | 0.32% | 1 | 0.76% |
| Guenter Roeck | 35 | 0.28% | 1 | 0.76% |
| Daniel Schaefer | 17 | 0.14% | 1 | 0.76% |
| Daniel W. S. Almeida | 14 | 0.11% | 1 | 0.76% |
| Oliver Neukum | 11 | 0.09% | 1 | 0.76% |
| Kieran Bingham | 7 | 0.06% | 2 | 1.52% |
| Alexey Fisher | 5 | 0.04% | 1 | 0.76% |
| Rafael J. Wysocki | 5 | 0.04% | 1 | 0.76% |
| zhong jiang | 4 | 0.03% | 1 | 0.76% |
| Akinobu Mita | 4 | 0.03% | 1 | 0.76% |
| Ralph Loader | 4 | 0.03% | 1 | 0.76% |
| Stephan Lachowsky | 3 | 0.02% | 1 | 0.76% |
| Michael Grzeschik | 3 | 0.02% | 1 | 0.76% |
| Chanho Min | 2 | 0.02% | 1 | 0.76% |
| Anton V. Shokurov | 2 | 0.02% | 1 | 0.76% |
| Mauro Carvalho Chehab | 2 | 0.02% | 1 | 0.76% |
| Linus Torvalds (pre-git) | 2 | 0.02% | 1 | 0.76% |
| Thomas Gleixner | 2 | 0.02% | 1 | 0.76% |
| Thomas Meyer | 2 | 0.02% | 1 | 0.76% |
| Arun Sharma | 1 | 0.01% | 1 | 0.76% |
| Ezequiel García | 1 | 0.01% | 1 | 0.76% |
| Linus Torvalds | 1 | 0.01% | 1 | 0.76% |
| William Manley | 1 | 0.01% | 1 | 0.76% |
| Total | 12335 | 132 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * uvc_ctrl.c -- USB Video Class driver - Controls * * Copyright (C) 2005-2010 * Laurent Pinchart (laurent.pinchart@ideasonboard.com) */ #include <asm/barrier.h> #include <linux/bitops.h> #include <linux/kernel.h> #include <linux/list.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/uaccess.h> #include <linux/usb.h> #include <linux/usb/uvc.h> #include <linux/videodev2.h> #include <linux/vmalloc.h> #include <linux/wait.h> #include <linux/workqueue.h> #include <linux/atomic.h> #include <media/v4l2-ctrls.h> #include "uvcvideo.h" #define UVC_CTRL_DATA_CURRENT 0 #define UVC_CTRL_DATA_BACKUP 1 #define UVC_CTRL_DATA_MIN 2 #define UVC_CTRL_DATA_MAX 3 #define UVC_CTRL_DATA_RES 4 #define UVC_CTRL_DATA_DEF 5 #define UVC_CTRL_DATA_LAST 6 /* ------------------------------------------------------------------------ * Controls */ static const struct uvc_control_info uvc_ctrls[] = { { .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_BRIGHTNESS_CONTROL, .index = 0, .size = 2, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE | UVC_CTRL_FLAG_RESTORE, }, { .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_CONTRAST_CONTROL, .index = 1, .size = 2, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE | UVC_CTRL_FLAG_RESTORE, }, { .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_HUE_CONTROL, .index = 2, .size = 2, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE | UVC_CTRL_FLAG_RESTORE | UVC_CTRL_FLAG_AUTO_UPDATE, }, { .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_SATURATION_CONTROL, .index = 3, .size = 2, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE | UVC_CTRL_FLAG_RESTORE, }, { .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_SHARPNESS_CONTROL, .index = 4, .size = 2, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE | UVC_CTRL_FLAG_RESTORE, }, { .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_GAMMA_CONTROL, .index = 5, .size = 2, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE | UVC_CTRL_FLAG_RESTORE, }, { .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL, .index = 6, .size = 2, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE | UVC_CTRL_FLAG_RESTORE | UVC_CTRL_FLAG_AUTO_UPDATE, }, { .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL, .index = 7, .size = 4, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE | UVC_CTRL_FLAG_RESTORE | UVC_CTRL_FLAG_AUTO_UPDATE, }, { .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_BACKLIGHT_COMPENSATION_CONTROL, .index = 8, .size = 2, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE | UVC_CTRL_FLAG_RESTORE, }, { .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_GAIN_CONTROL, .index = 9, .size = 2, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE | UVC_CTRL_FLAG_RESTORE, }, { .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL, .index = 10, .size = 1, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE, }, { .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_HUE_AUTO_CONTROL, .index = 11, .size = 1, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE, }, { .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL, .index = 12, .size = 1, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE, }, { .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL, .index = 13, .size = 1, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE, }, { .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_DIGITAL_MULTIPLIER_CONTROL, .index = 14, .size = 2, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE | UVC_CTRL_FLAG_RESTORE, }, { .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_DIGITAL_MULTIPLIER_LIMIT_CONTROL, .index = 15, .size = 2, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE | UVC_CTRL_FLAG_RESTORE, }, { .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_ANALOG_VIDEO_STANDARD_CONTROL, .index = 16, .size = 1, .flags = UVC_CTRL_FLAG_GET_CUR, }, { .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_ANALOG_LOCK_STATUS_CONTROL, .index = 17, .size = 1, .flags = UVC_CTRL_FLAG_GET_CUR, }, { .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_SCANNING_MODE_CONTROL, .index = 0, .size = 1, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR | UVC_CTRL_FLAG_RESTORE, }, { .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_AE_MODE_CONTROL, .index = 1, .size = 1, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_GET_RES | UVC_CTRL_FLAG_RESTORE, }, { .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_AE_PRIORITY_CONTROL, .index = 2, .size = 1, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR | UVC_CTRL_FLAG_RESTORE, }, { .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL, .index = 3, .size = 4, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE | UVC_CTRL_FLAG_RESTORE | UVC_CTRL_FLAG_AUTO_UPDATE, }, { .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_EXPOSURE_TIME_RELATIVE_CONTROL, .index = 4, .size = 1, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_RESTORE, }, { .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_FOCUS_ABSOLUTE_CONTROL, .index = 5, .size = 2, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE | UVC_CTRL_FLAG_RESTORE | UVC_CTRL_FLAG_AUTO_UPDATE, }, { .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_FOCUS_RELATIVE_CONTROL, .index = 6, .size = 2, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_AUTO_UPDATE, }, { .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_IRIS_ABSOLUTE_CONTROL, .index = 7, .size = 2, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE | UVC_CTRL_FLAG_RESTORE | UVC_CTRL_FLAG_AUTO_UPDATE, }, { .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_IRIS_RELATIVE_CONTROL, .index = 8, .size = 1, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_AUTO_UPDATE, }, { .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_ZOOM_ABSOLUTE_CONTROL, .index = 9, .size = 2, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE | UVC_CTRL_FLAG_RESTORE | UVC_CTRL_FLAG_AUTO_UPDATE, }, { .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_ZOOM_RELATIVE_CONTROL, .index = 10, .size = 3, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_AUTO_UPDATE, }, { .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL, .index = 11, .size = 8, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE | UVC_CTRL_FLAG_RESTORE | UVC_CTRL_FLAG_AUTO_UPDATE, }, { .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_PANTILT_RELATIVE_CONTROL, .index = 12, .size = 4, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE | UVC_CTRL_FLAG_AUTO_UPDATE, }, { .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_ROLL_ABSOLUTE_CONTROL, .index = 13, .size = 2, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_RANGE | UVC_CTRL_FLAG_RESTORE | UVC_CTRL_FLAG_AUTO_UPDATE, }, { .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_ROLL_RELATIVE_CONTROL, .index = 14, .size = 2, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_AUTO_UPDATE, }, { .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_FOCUS_AUTO_CONTROL, .index = 17, .size = 1, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE, }, { .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_PRIVACY_CONTROL, .index = 18, .size = 1, .flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR | UVC_CTRL_FLAG_RESTORE | UVC_CTRL_FLAG_AUTO_UPDATE, }, { .entity = UVC_GUID_EXT_GPIO_CONTROLLER, .selector = UVC_CT_PRIVACY_CONTROL, .index = 0, .size = 1, .flags = UVC_CTRL_FLAG_GET_CUR | UVC_CTRL_FLAG_AUTO_UPDATE, }, }; static const u32 uvc_control_classes[] = { V4L2_CID_CAMERA_CLASS, V4L2_CID_USER_CLASS, }; static const int exposure_auto_mapping[] = { 2, 1, 4, 8 }; /* * This function translates the V4L2 menu index @idx, as exposed to userspace as * the V4L2 control value, to the corresponding UVC control value used by the * device. The custom menu_mapping in the control @mapping is used when * available, otherwise the function assumes that the V4L2 and UVC values are * identical. * * For controls of type UVC_CTRL_DATA_TYPE_BITMASK, the UVC control value is * expressed as a bitmask and is thus guaranteed to have a single bit set. * * The function returns -EINVAL if the V4L2 menu index @idx isn't valid for the * control, which includes all controls whose type isn't UVC_CTRL_DATA_TYPE_ENUM * or UVC_CTRL_DATA_TYPE_BITMASK. */ static int uvc_mapping_get_menu_value(const struct uvc_control_mapping *mapping, u32 idx) { if (!test_bit(idx, &mapping->menu_mask)) return -EINVAL; if (mapping->menu_mapping) return mapping->menu_mapping[idx]; return idx; } static const char * uvc_mapping_get_menu_name(const struct uvc_control_mapping *mapping, u32 idx) { if (!test_bit(idx, &mapping->menu_mask)) return NULL; if (mapping->menu_names) return mapping->menu_names[idx]; return v4l2_ctrl_get_menu(mapping->id)[idx]; } static s32 uvc_ctrl_get_zoom(struct uvc_control_mapping *mapping, u8 query, const u8 *data) { s8 zoom = (s8)data[0]; switch (query) { case UVC_GET_CUR: return (zoom == 0) ? 0 : (zoom > 0 ? data[2] : -data[2]); case UVC_GET_MIN: case UVC_GET_MAX: case UVC_GET_RES: case UVC_GET_DEF: default: return data[2]; } } static void uvc_ctrl_set_zoom(struct uvc_control_mapping *mapping, s32 value, u8 *data) { data[0] = value == 0 ? 0 : (value > 0) ? 1 : 0xff; data[2] = min((int)abs(value), 0xff); } static s32 uvc_ctrl_get_rel_speed(struct uvc_control_mapping *mapping, u8 query, const u8 *data) { unsigned int first = mapping->offset / 8; s8 rel = (s8)data[first]; switch (query) { case UVC_GET_CUR: return (rel == 0) ? 0 : (rel > 0 ? data[first+1] : -data[first+1]); case UVC_GET_MIN: return -data[first+1]; case UVC_GET_MAX: case UVC_GET_RES: case UVC_GET_DEF: default: return data[first+1]; } } static void uvc_ctrl_set_rel_speed(struct uvc_control_mapping *mapping, s32 value, u8 *data) { unsigned int first = mapping->offset / 8; data[first] = value == 0 ? 0 : (value > 0) ? 1 : 0xff; data[first+1] = min_t(int, abs(value), 0xff); } static const struct uvc_control_mapping uvc_ctrl_power_line_mapping_limited = { .id = V4L2_CID_POWER_LINE_FREQUENCY, .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL, .size = 2, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_MENU, .data_type = UVC_CTRL_DATA_TYPE_ENUM, .menu_mask = GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_60HZ, V4L2_CID_POWER_LINE_FREQUENCY_50HZ), }; static const struct uvc_control_mapping uvc_ctrl_power_line_mapping_uvc11 = { .id = V4L2_CID_POWER_LINE_FREQUENCY, .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL, .size = 2, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_MENU, .data_type = UVC_CTRL_DATA_TYPE_ENUM, .menu_mask = GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_60HZ, V4L2_CID_POWER_LINE_FREQUENCY_DISABLED), }; static const struct uvc_control_mapping uvc_ctrl_power_line_mapping_uvc15 = { .id = V4L2_CID_POWER_LINE_FREQUENCY, .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL, .size = 2, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_MENU, .data_type = UVC_CTRL_DATA_TYPE_ENUM, .menu_mask = GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_AUTO, V4L2_CID_POWER_LINE_FREQUENCY_DISABLED), }; static const struct uvc_control_mapping *uvc_ctrl_filter_plf_mapping( struct uvc_video_chain *chain, struct uvc_control *ctrl) { const struct uvc_control_mapping *out_mapping = &uvc_ctrl_power_line_mapping_uvc11; u8 *buf __free(kfree) = NULL; u8 init_val; int ret; buf = kmalloc(sizeof(*buf), GFP_KERNEL); if (!buf) return NULL; /* Save the current PLF value, so we can restore it. */ ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, ctrl->entity->id, chain->dev->intfnum, ctrl->info.selector, buf, sizeof(*buf)); /* If we cannot read the control skip it. */ if (ret) return NULL; init_val = *buf; /* If PLF value cannot be set to off, it is limited. */ *buf = V4L2_CID_POWER_LINE_FREQUENCY_DISABLED; ret = uvc_query_ctrl(chain->dev, UVC_SET_CUR, ctrl->entity->id, chain->dev->intfnum, ctrl->info.selector, buf, sizeof(*buf)); if (ret) return &uvc_ctrl_power_line_mapping_limited; /* UVC 1.1 does not define auto, we can exit. */ if (chain->dev->uvc_version < 0x150) goto end; /* Check if the device supports auto. */ *buf = V4L2_CID_POWER_LINE_FREQUENCY_AUTO; ret = uvc_query_ctrl(chain->dev, UVC_SET_CUR, ctrl->entity->id, chain->dev->intfnum, ctrl->info.selector, buf, sizeof(*buf)); if (!ret) out_mapping = &uvc_ctrl_power_line_mapping_uvc15; end: /* Restore initial value and add mapping. */ *buf = init_val; uvc_query_ctrl(chain->dev, UVC_SET_CUR, ctrl->entity->id, chain->dev->intfnum, ctrl->info.selector, buf, sizeof(*buf)); return out_mapping; } static const struct uvc_control_mapping uvc_ctrl_mappings[] = { { .id = V4L2_CID_BRIGHTNESS, .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_BRIGHTNESS_CONTROL, .size = 16, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_SIGNED, }, { .id = V4L2_CID_CONTRAST, .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_CONTRAST_CONTROL, .size = 16, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, }, { .id = V4L2_CID_HUE, .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_HUE_CONTROL, .size = 16, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_SIGNED, .master_id = V4L2_CID_HUE_AUTO, .master_manual = 0, }, { .id = V4L2_CID_SATURATION, .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_SATURATION_CONTROL, .size = 16, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, }, { .id = V4L2_CID_SHARPNESS, .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_SHARPNESS_CONTROL, .size = 16, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, }, { .id = V4L2_CID_GAMMA, .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_GAMMA_CONTROL, .size = 16, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, }, { .id = V4L2_CID_BACKLIGHT_COMPENSATION, .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_BACKLIGHT_COMPENSATION_CONTROL, .size = 16, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, }, { .id = V4L2_CID_GAIN, .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_GAIN_CONTROL, .size = 16, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, }, { .id = V4L2_CID_HUE_AUTO, .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_HUE_AUTO_CONTROL, .size = 1, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, .slave_ids = { V4L2_CID_HUE, }, }, { .id = V4L2_CID_EXPOSURE_AUTO, .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_AE_MODE_CONTROL, .size = 4, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_MENU, .data_type = UVC_CTRL_DATA_TYPE_BITMASK, .menu_mapping = exposure_auto_mapping, .menu_mask = GENMASK(V4L2_EXPOSURE_APERTURE_PRIORITY, V4L2_EXPOSURE_AUTO), .slave_ids = { V4L2_CID_EXPOSURE_ABSOLUTE, }, }, { .id = V4L2_CID_EXPOSURE_AUTO_PRIORITY, .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_AE_PRIORITY_CONTROL, .size = 1, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, }, { .id = V4L2_CID_EXPOSURE_ABSOLUTE, .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL, .size = 32, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, .master_id = V4L2_CID_EXPOSURE_AUTO, .master_manual = V4L2_EXPOSURE_MANUAL, }, { .id = V4L2_CID_AUTO_WHITE_BALANCE, .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL, .size = 1, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, .slave_ids = { V4L2_CID_WHITE_BALANCE_TEMPERATURE, }, }, { .id = V4L2_CID_WHITE_BALANCE_TEMPERATURE, .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL, .size = 16, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, .master_id = V4L2_CID_AUTO_WHITE_BALANCE, .master_manual = 0, }, { .id = V4L2_CID_AUTO_WHITE_BALANCE, .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL, .size = 1, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, .slave_ids = { V4L2_CID_BLUE_BALANCE, V4L2_CID_RED_BALANCE }, }, { .id = V4L2_CID_BLUE_BALANCE, .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL, .size = 16, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_SIGNED, .master_id = V4L2_CID_AUTO_WHITE_BALANCE, .master_manual = 0, }, { .id = V4L2_CID_RED_BALANCE, .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL, .size = 16, .offset = 16, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_SIGNED, .master_id = V4L2_CID_AUTO_WHITE_BALANCE, .master_manual = 0, }, { .id = V4L2_CID_FOCUS_ABSOLUTE, .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_FOCUS_ABSOLUTE_CONTROL, .size = 16, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, .master_id = V4L2_CID_FOCUS_AUTO, .master_manual = 0, }, { .id = V4L2_CID_FOCUS_AUTO, .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_FOCUS_AUTO_CONTROL, .size = 1, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, .slave_ids = { V4L2_CID_FOCUS_ABSOLUTE, }, }, { .id = V4L2_CID_IRIS_ABSOLUTE, .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_IRIS_ABSOLUTE_CONTROL, .size = 16, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, }, { .id = V4L2_CID_IRIS_RELATIVE, .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_IRIS_RELATIVE_CONTROL, .size = 8, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_SIGNED, }, { .id = V4L2_CID_ZOOM_ABSOLUTE, .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_ZOOM_ABSOLUTE_CONTROL, .size = 16, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, }, { .id = V4L2_CID_ZOOM_CONTINUOUS, .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_ZOOM_RELATIVE_CONTROL, .size = 0, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_SIGNED, .get = uvc_ctrl_get_zoom, .set = uvc_ctrl_set_zoom, }, { .id = V4L2_CID_PAN_ABSOLUTE, .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL, .size = 32, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_SIGNED, }, { .id = V4L2_CID_TILT_ABSOLUTE, .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL, .size = 32, .offset = 32, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_SIGNED, }, { .id = V4L2_CID_PAN_SPEED, .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_PANTILT_RELATIVE_CONTROL, .size = 16, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_SIGNED, .get = uvc_ctrl_get_rel_speed, .set = uvc_ctrl_set_rel_speed, }, { .id = V4L2_CID_TILT_SPEED, .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_PANTILT_RELATIVE_CONTROL, .size = 16, .offset = 16, .v4l2_type = V4L2_CTRL_TYPE_INTEGER, .data_type = UVC_CTRL_DATA_TYPE_SIGNED, .get = uvc_ctrl_get_rel_speed, .set = uvc_ctrl_set_rel_speed, }, { .id = V4L2_CID_PRIVACY, .entity = UVC_GUID_UVC_CAMERA, .selector = UVC_CT_PRIVACY_CONTROL, .size = 1, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, }, { .id = V4L2_CID_PRIVACY, .entity = UVC_GUID_EXT_GPIO_CONTROLLER, .selector = UVC_CT_PRIVACY_CONTROL, .size = 1, .offset = 0, .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, }, { .entity = UVC_GUID_UVC_PROCESSING, .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL, .filter_mapping = uvc_ctrl_filter_plf_mapping, }, }; /* ------------------------------------------------------------------------ * Utility functions */ static inline u8 *uvc_ctrl_data(struct uvc_control *ctrl, int id) { return ctrl->uvc_data + id * ctrl->info.size; } static inline int uvc_test_bit(const u8 *data, int bit) { return (data[bit >> 3] >> (bit & 7)) & 1; } static inline void uvc_clear_bit(u8 *data, int bit) { data[bit >> 3] &= ~(1 << (bit & 7)); } /* * Extract the bit string specified by mapping->offset and mapping->size * from the little-endian data stored at 'data' and return the result as * a signed 32bit integer. Sign extension will be performed if the mapping * references a signed data type. */ static s32 uvc_get_le_value(struct uvc_control_mapping *mapping, u8 query, const u8 *data) { int bits = mapping->size; int offset = mapping->offset; s32 value = 0; u8 mask; data += offset / 8; offset &= 7; mask = ((1LL << bits) - 1) << offset; while (1) { u8 byte = *data & mask; value |= offset > 0 ? (byte >> offset) : (byte << (-offset)); bits -= 8 - max(offset, 0); if (bits <= 0) break; offset -= 8; mask = (1 << bits) - 1; data++; } /* Sign-extend the value if needed. */ if (mapping->data_type == UVC_CTRL_DATA_TYPE_SIGNED) value |= -(value & (1 << (mapping->size - 1))); return value; } /* * Set the bit string specified by mapping->offset and mapping->size * in the little-endian data stored at 'data' to the value 'value'. */ static void uvc_set_le_value(struct uvc_control_mapping *mapping, s32 value, u8 *data) { int bits = mapping->size; int offset = mapping->offset; u8 mask; /* * According to the v4l2 spec, writing any value to a button control * should result in the action belonging to the button control being * triggered. UVC devices however want to see a 1 written -> override * value. */ if (mapping->v4l2_type == V4L2_CTRL_TYPE_BUTTON) value = -1; data += offset / 8; offset &= 7; for (; bits > 0; data++) { mask = ((1LL << bits) - 1) << offset; *data = (*data & ~mask) | ((value << offset) & mask); value >>= offset ? offset : 8; bits -= 8 - offset; offset = 0; } } /* ------------------------------------------------------------------------ * Terminal and unit management */ static int uvc_entity_match_guid(const struct uvc_entity *entity, const u8 guid[16]) { return memcmp(entity->guid, guid, sizeof(entity->guid)) == 0; } /* ------------------------------------------------------------------------ * UVC Controls */ static void __uvc_find_control(struct uvc_entity *entity, u32 v4l2_id, struct uvc_control_mapping **mapping, struct uvc_control **control, int next) { struct uvc_control *ctrl; struct uvc_control_mapping *map; unsigned int i; if (entity == NULL) return; for (i = 0; i < entity->ncontrols; ++i) { ctrl = &entity->controls[i]; if (!ctrl->initialized) continue; list_for_each_entry(map, &ctrl->info.mappings, list) { if ((map->id == v4l2_id) && !next) { *control = ctrl; *mapping = map; return; } if ((*mapping == NULL || (*mapping)->id > map->id) && (map->id > v4l2_id) && next) { *control = ctrl; *mapping = map; } } } } static struct uvc_control *uvc_find_control(struct uvc_video_chain *chain, u32 v4l2_id, struct uvc_control_mapping **mapping) { struct uvc_control *ctrl = NULL; struct uvc_entity *entity; int next = v4l2_id & V4L2_CTRL_FLAG_NEXT_CTRL; *mapping = NULL; /* Mask the query flags. */ v4l2_id &= V4L2_CTRL_ID_MASK; /* Find the control. */ list_for_each_entry(entity, &chain->entities, chain) { __uvc_find_control(entity, v4l2_id, mapping, &ctrl, next); if (ctrl && !next) return ctrl; } if (ctrl == NULL && !next) uvc_dbg(chain->dev, CONTROL, "Control 0x%08x not found\n", v4l2_id); return ctrl; } static int uvc_ctrl_populate_cache(struct uvc_video_chain *chain, struct uvc_control *ctrl) { int ret; if (ctrl->info.flags & UVC_CTRL_FLAG_GET_DEF) { ret = uvc_query_ctrl(chain->dev, UVC_GET_DEF, ctrl->entity->id, chain->dev->intfnum, ctrl->info.selector, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF), ctrl->info.size); if (ret < 0) return ret; } if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN) { ret = uvc_query_ctrl(chain->dev, UVC_GET_MIN, ctrl->entity->id, chain->dev->intfnum, ctrl->info.selector, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN), ctrl->info.size); if (ret < 0) return ret; } if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX) { ret = uvc_query_ctrl(chain->dev, UVC_GET_MAX, ctrl->entity->id, chain->dev->intfnum, ctrl->info.selector, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX), ctrl->info.size); if (ret < 0) return ret; } if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES) { ret = uvc_query_ctrl(chain->dev, UVC_GET_RES, ctrl->entity->id, chain->dev->intfnum, ctrl->info.selector, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES), ctrl->info.size); if (ret < 0) { if (UVC_ENTITY_TYPE(ctrl->entity) != UVC_VC_EXTENSION_UNIT) return ret; /* * GET_RES is mandatory for XU controls, but some * cameras still choke on it. Ignore errors and set the * resolution value to zero. */ uvc_warn_once(chain->dev, UVC_WARN_XU_GET_RES, "UVC non compliance - GET_RES failed on " "an XU control. Enabling workaround.\n"); memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES), 0, ctrl->info.size); } } ctrl->cached = 1; return 0; } static s32 __uvc_ctrl_get_value(struct uvc_control_mapping *mapping, const u8 *data) { s32 value = mapping->get(mapping, UVC_GET_CUR, data); if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) { unsigned int i; for (i = 0; BIT(i) <= mapping->menu_mask; ++i) { u32 menu_value; if (!test_bit(i, &mapping->menu_mask)) continue; menu_value = uvc_mapping_get_menu_value(mapping, i); if (menu_value == value) { value = i; break; } } } return value; } static int __uvc_ctrl_load_cur(struct uvc_video_chain *chain, struct uvc_control *ctrl) { u8 *data; int ret; if (ctrl->loaded) return 0; data = uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT); if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) { memset(data, 0, ctrl->info.size); ctrl->loaded = 1; return 0; } if (ctrl->entity->get_cur) ret = ctrl->entity->get_cur(chain->dev, ctrl->entity, ctrl->info.selector, data, ctrl->info.size); else ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, ctrl->entity->id, chain->dev->intfnum, ctrl->info.selector, data, ctrl->info.size); if (ret < 0) return ret; ctrl->loaded = 1; return ret; } static int __uvc_ctrl_get(struct uvc_video_chain *chain, struct uvc_control *ctrl, struct uvc_control_mapping *mapping, s32 *value) { int ret; if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) return -EACCES; ret = __uvc_ctrl_load_cur(chain, ctrl); if (ret < 0) return ret; *value = __uvc_ctrl_get_value(mapping, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); return 0; } static int __uvc_query_v4l2_class(struct uvc_video_chain *chain, u32 req_id, u32 found_id) { bool find_next = req_id & V4L2_CTRL_FLAG_NEXT_CTRL; unsigned int i; req_id &= V4L2_CTRL_ID_MASK; for (i = 0; i < ARRAY_SIZE(uvc_control_classes); i++) { if (!(chain->ctrl_class_bitmap & BIT(i))) continue; if (!find_next) { if (uvc_control_classes[i] == req_id) return i; continue; } if (uvc_control_classes[i] > req_id && uvc_control_classes[i] < found_id) return i; } return -ENODEV; } static int uvc_query_v4l2_class(struct uvc_video_chain *chain, u32 req_id, u32 found_id, struct v4l2_queryctrl *v4l2_ctrl) { int idx; idx = __uvc_query_v4l2_class(chain, req_id, found_id); if (idx < 0) return -ENODEV; memset(v4l2_ctrl, 0, sizeof(*v4l2_ctrl)); v4l2_ctrl->id = uvc_control_classes[idx]; strscpy(v4l2_ctrl->name, v4l2_ctrl_get_name(v4l2_ctrl->id), sizeof(v4l2_ctrl->name)); v4l2_ctrl->type = V4L2_CTRL_TYPE_CTRL_CLASS; v4l2_ctrl->flags = V4L2_CTRL_FLAG_WRITE_ONLY | V4L2_CTRL_FLAG_READ_ONLY; return 0; } /* * Check if control @v4l2_id can be accessed by the given control @ioctl * (VIDIOC_G_EXT_CTRLS, VIDIOC_TRY_EXT_CTRLS or VIDIOC_S_EXT_CTRLS). * * For set operations on slave controls, check if the master's value is set to * manual, either in the others controls set in the same ioctl call, or from * the master's current value. This catches VIDIOC_S_EXT_CTRLS calls that set * both the master and slave control, such as for instance setting * auto_exposure=1, exposure_time_absolute=251. */ int uvc_ctrl_is_accessible(struct uvc_video_chain *chain, u32 v4l2_id, const struct v4l2_ext_controls *ctrls, unsigned long ioctl) { struct uvc_control_mapping *master_map = NULL; struct uvc_control *master_ctrl = NULL; struct uvc_control_mapping *mapping; struct uvc_control *ctrl; bool read = ioctl == VIDIOC_G_EXT_CTRLS; s32 val; int ret; int i; if (__uvc_query_v4l2_class(chain, v4l2_id, 0) >= 0) return -EACCES; ctrl = uvc_find_control(chain, v4l2_id, &mapping); if (!ctrl) return -EINVAL; if (!(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) && read) return -EACCES; if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR) && !read) return -EACCES; if (ioctl != VIDIOC_S_EXT_CTRLS || !mapping->master_id) return 0; /* * Iterate backwards in cases where the master control is accessed * multiple times in the same ioctl. We want the last value. */ for (i = ctrls->count - 1; i >= 0; i--) { if (ctrls->controls[i].id == mapping->master_id) return ctrls->controls[i].value == mapping->master_manual ? 0 : -EACCES; } __uvc_find_control(ctrl->entity, mapping->master_id, &master_map, &master_ctrl, 0); if (!master_ctrl || !(master_ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) return 0; ret = __uvc_ctrl_get(chain, master_ctrl, master_map, &val); if (ret >= 0 && val != mapping->master_manual) return -EACCES; return 0; } static const char *uvc_map_get_name(const struct uvc_control_mapping *map) { const char *name; if (map->name) return map->name; name = v4l2_ctrl_get_name(map->id); if (name) return name; return "Unknown Control"; } static u32 uvc_get_ctrl_bitmap(struct uvc_control *ctrl, struct uvc_control_mapping *mapping) { /* * Some controls, like CT_AE_MODE_CONTROL, use GET_RES to represent * the number of bits supported. Those controls do not list GET_MAX * as supported. */ if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES) return mapping->get(mapping, UVC_GET_RES, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX) return mapping->get(mapping, UVC_GET_MAX, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX)); return ~0; } static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, struct uvc_control *ctrl, struct uvc_control_mapping *mapping, struct v4l2_queryctrl *v4l2_ctrl) { struct uvc_control_mapping *master_map = NULL; struct uvc_control *master_ctrl = NULL; unsigned int i; memset(v4l2_ctrl, 0, sizeof(*v4l2_ctrl)); v4l2_ctrl->id = mapping->id; v4l2_ctrl->type = mapping->v4l2_type; strscpy(v4l2_ctrl->name, uvc_map_get_name(mapping), sizeof(v4l2_ctrl->name)); v4l2_ctrl->flags = 0; if (!(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) v4l2_ctrl->flags |= V4L2_CTRL_FLAG_WRITE_ONLY; if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR)) v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; if (mapping->master_id) __uvc_find_control(ctrl->entity, mapping->master_id, &master_map, &master_ctrl, 0); if (master_ctrl && (master_ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) { s32 val; int ret = __uvc_ctrl_get(chain, master_ctrl, master_map, &val); if (ret < 0) return ret; if (val != mapping->master_manual) v4l2_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE; } if (!ctrl->cached) { int ret = uvc_ctrl_populate_cache(chain, ctrl); if (ret < 0) return ret; } if (ctrl->info.flags & UVC_CTRL_FLAG_GET_DEF) { v4l2_ctrl->default_value = mapping->get(mapping, UVC_GET_DEF, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF)); } switch (mapping->v4l2_type) { case V4L2_CTRL_TYPE_MENU: v4l2_ctrl->minimum = ffs(mapping->menu_mask) - 1; v4l2_ctrl->maximum = fls(mapping->menu_mask) - 1; v4l2_ctrl->step = 1; for (i = 0; BIT(i) <= mapping->menu_mask; ++i) { u32 menu_value; if (!test_bit(i, &mapping->menu_mask)) continue; menu_value = uvc_mapping_get_menu_value(mapping, i); if (menu_value == v4l2_ctrl->default_value) { v4l2_ctrl->default_value = i; break; } } return 0; case V4L2_CTRL_TYPE_BOOLEAN: v4l2_ctrl->minimum = 0; v4l2_ctrl->maximum = 1; v4l2_ctrl->step = 1; return 0; case V4L2_CTRL_TYPE_BUTTON: v4l2_ctrl->minimum = 0; v4l2_ctrl->maximum = 0; v4l2_ctrl->step = 0; return 0; case V4L2_CTRL_TYPE_BITMASK: v4l2_ctrl->minimum = 0; v4l2_ctrl->maximum = uvc_get_ctrl_bitmap(ctrl, mapping); v4l2_ctrl->step = 0; return 0; default: break; } if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN) v4l2_ctrl->minimum = mapping->get(mapping, UVC_GET_MIN, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN)); if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX) v4l2_ctrl->maximum = mapping->get(mapping, UVC_GET_MAX, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX)); if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES) v4l2_ctrl->step = mapping->get(mapping, UVC_GET_RES, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); return 0; } int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, struct v4l2_queryctrl *v4l2_ctrl) { struct uvc_control *ctrl; struct uvc_control_mapping *mapping; int ret; ret = mutex_lock_interruptible(&chain->ctrl_mutex); if (ret < 0) return -ERESTARTSYS; /* Check if the ctrl is a know class */ if (!(v4l2_ctrl->id & V4L2_CTRL_FLAG_NEXT_CTRL)) { ret = uvc_query_v4l2_class(chain, v4l2_ctrl->id, 0, v4l2_ctrl); if (!ret) goto done; } ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping); if (ctrl == NULL) { ret = -EINVAL; goto done; } /* * If we're enumerating control with V4L2_CTRL_FLAG_NEXT_CTRL, check if * a class should be inserted between the previous control and the one * we have just found. */ if (v4l2_ctrl->id & V4L2_CTRL_FLAG_NEXT_CTRL) { ret = uvc_query_v4l2_class(chain, v4l2_ctrl->id, mapping->id, v4l2_ctrl); if (!ret) goto done; } ret = __uvc_query_v4l2_ctrl(chain, ctrl, mapping, v4l2_ctrl); done: mutex_unlock(&chain->ctrl_mutex); return ret; } /* * Mapping V4L2 controls to UVC controls can be straightforward if done well. * Most of the UVC controls exist in V4L2, and can be mapped directly. Some * must be grouped (for instance the Red Balance, Blue Balance and Do White * Balance V4L2 controls use the White Balance Component UVC control) or * otherwise translated. The approach we take here is to use a translation * table for the controls that can be mapped directly, and handle the others * manually. */ int uvc_query_v4l2_menu(struct uvc_video_chain *chain, struct v4l2_querymenu *query_menu) { struct uvc_control_mapping *mapping; struct uvc_control *ctrl; u32 index = query_menu->index; u32 id = query_menu->id; const char *name; int ret; memset(query_menu, 0, sizeof(*query_menu)); query_menu->id = id; query_menu->index = index; if (index >= BITS_PER_TYPE(mapping->menu_mask)) return -EINVAL; ret = mutex_lock_interruptible(&chain->ctrl_mutex); if (ret < 0) return -ERESTARTSYS; ctrl = uvc_find_control(chain, query_menu->id, &mapping); if (ctrl == NULL || mapping->v4l2_type != V4L2_CTRL_TYPE_MENU) { ret = -EINVAL; goto done; } if (!test_bit(query_menu->index, &mapping->menu_mask)) { ret = -EINVAL; goto done; } if (mapping->data_type == UVC_CTRL_DATA_TYPE_BITMASK) { int mask; if (!ctrl->cached) { ret = uvc_ctrl_populate_cache(chain, ctrl); if (ret < 0) goto done; } mask = uvc_mapping_get_menu_value(mapping, query_menu->index); if (mask < 0) { ret = mask; goto done; } if (!(uvc_get_ctrl_bitmap(ctrl, mapping) & mask)) { ret = -EINVAL; goto done; } } name = uvc_mapping_get_menu_name(mapping, query_menu->index); if (!name) { ret = -EINVAL; goto done; } strscpy(query_menu->name, name, sizeof(query_menu->name)); done: mutex_unlock(&chain->ctrl_mutex); return ret; } /* -------------------------------------------------------------------------- * Ctrl event handling */ static void uvc_ctrl_fill_event(struct uvc_video_chain *chain, struct v4l2_event *ev, struct uvc_control *ctrl, struct uvc_control_mapping *mapping, s32 value, u32 changes) { struct v4l2_queryctrl v4l2_ctrl; __uvc_query_v4l2_ctrl(chain, ctrl, mapping, &v4l2_ctrl); memset(ev, 0, sizeof(*ev)); ev->type = V4L2_EVENT_CTRL; ev->id = v4l2_ctrl.id; ev->u.ctrl.value = value; ev->u.ctrl.changes = changes; ev->u.ctrl.type = v4l2_ctrl.type; ev->u.ctrl.flags = v4l2_ctrl.flags; ev->u.ctrl.minimum = v4l2_ctrl.minimum; ev->u.ctrl.maximum = v4l2_ctrl.maximum; ev->u.ctrl.step = v4l2_ctrl.step; ev->u.ctrl.default_value = v4l2_ctrl.default_value; } /* * Send control change events to all subscribers for the @ctrl control. By * default the subscriber that generated the event, as identified by @handle, * is not notified unless it has set the V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK flag. * @handle can be NULL for asynchronous events related to auto-update controls, * in which case all subscribers are notified. */ static void uvc_ctrl_send_event(struct uvc_video_chain *chain, struct uvc_fh *handle, struct uvc_control *ctrl, struct uvc_control_mapping *mapping, s32 value, u32 changes) { struct v4l2_fh *originator = handle ? &handle->vfh : NULL; struct v4l2_subscribed_event *sev; struct v4l2_event ev; if (list_empty(&mapping->ev_subs)) return; uvc_ctrl_fill_event(chain, &ev, ctrl, mapping, value, changes); list_for_each_entry(sev, &mapping->ev_subs, node) { if (sev->fh != originator || (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK) || (changes & V4L2_EVENT_CTRL_CH_FLAGS)) v4l2_event_queue_fh(sev->fh, &ev); } } /* * Send control change events for the slave of the @master control identified * by the V4L2 ID @slave_id. The @handle identifies the event subscriber that * generated the event and may be NULL for auto-update events. */ static void uvc_ctrl_send_slave_event(struct uvc_video_chain *chain, struct uvc_fh *handle, struct uvc_control *master, u32 slave_id) { struct uvc_control_mapping *mapping = NULL; struct uvc_control *ctrl = NULL; u32 changes = V4L2_EVENT_CTRL_CH_FLAGS; s32 val = 0; __uvc_find_control(master->entity, slave_id, &mapping, &ctrl, 0); if (ctrl == NULL) return; if (__uvc_ctrl_get(chain, ctrl, mapping, &val) == 0) changes |= V4L2_EVENT_CTRL_CH_VALUE; uvc_ctrl_send_event(chain, handle, ctrl, mapping, val, changes); } void uvc_ctrl_status_event(struct uvc_video_chain *chain, struct uvc_control *ctrl, const u8 *data) { struct uvc_control_mapping *mapping; struct uvc_fh *handle; unsigned int i; mutex_lock(&chain->ctrl_mutex); handle = ctrl->handle; ctrl->handle = NULL; list_for_each_entry(mapping, &ctrl->info.mappings, list) { s32 value = __uvc_ctrl_get_value(mapping, data); /* * handle may be NULL here if the device sends auto-update * events without a prior related control set from userspace. */ for (i = 0; i < ARRAY_SIZE(mapping->slave_ids); ++i) { if (!mapping->slave_ids[i]) break; uvc_ctrl_send_slave_event(chain, handle, ctrl, mapping->slave_ids[i]); } uvc_ctrl_send_event(chain, handle, ctrl, mapping, value, V4L2_EVENT_CTRL_CH_VALUE); } mutex_unlock(&chain->ctrl_mutex); } static void uvc_ctrl_status_event_work(struct work_struct *work) { struct uvc_device *dev = container_of(work, struct uvc_device, async_ctrl.work); struct uvc_ctrl_work *w = &dev->async_ctrl; int ret; uvc_ctrl_status_event(w->chain, w->ctrl, w->data); /* The barrier is needed to synchronize with uvc_status_stop(). */ if (smp_load_acquire(&dev->flush_status)) return; /* Resubmit the URB. */ w->urb->interval = dev->int_ep->desc.bInterval; ret = usb_submit_urb(w->urb, GFP_KERNEL); if (ret < 0) dev_err(&dev->udev->dev, "Failed to resubmit status URB (%d).\n", ret); } bool uvc_ctrl_status_event_async(struct urb *urb, struct uvc_video_chain *chain, struct uvc_control *ctrl, const u8 *data) { struct uvc_device *dev = chain->dev; struct uvc_ctrl_work *w = &dev->async_ctrl; if (list_empty(&ctrl->info.mappings)) { ctrl->handle = NULL; return false; } w->data = data; w->urb = urb; w->chain = chain; w->ctrl = ctrl; schedule_work(&w->work); return true; } static bool uvc_ctrl_xctrls_has_control(const struct v4l2_ext_control *xctrls, unsigned int xctrls_count, u32 id) { unsigned int i; for (i = 0; i < xctrls_count; ++i) { if (xctrls[i].id == id) return true; } return false; } static void uvc_ctrl_send_events(struct uvc_fh *handle, const struct v4l2_ext_control *xctrls, unsigned int xctrls_count) { struct uvc_control_mapping *mapping; struct uvc_control *ctrl; u32 changes = V4L2_EVENT_CTRL_CH_VALUE; unsigned int i; unsigned int j; for (i = 0; i < xctrls_count; ++i) { ctrl = uvc_find_control(handle->chain, xctrls[i].id, &mapping); if (ctrl->info.flags & UVC_CTRL_FLAG_ASYNCHRONOUS) /* Notification will be sent from an Interrupt event. */ continue; for (j = 0; j < ARRAY_SIZE(mapping->slave_ids); ++j) { u32 slave_id = mapping->slave_ids[j]; if (!slave_id) break; /* * We can skip sending an event for the slave if the * slave is being modified in the same transaction. */ if (uvc_ctrl_xctrls_has_control(xctrls, xctrls_count, slave_id)) continue; uvc_ctrl_send_slave_event(handle->chain, handle, ctrl, slave_id); } /* * If the master is being modified in the same transaction * flags may change too. */ if (mapping->master_id && uvc_ctrl_xctrls_has_control(xctrls, xctrls_count, mapping->master_id)) changes |= V4L2_EVENT_CTRL_CH_FLAGS; uvc_ctrl_send_event(handle->chain, handle, ctrl, mapping, xctrls[i].value, changes); } } static int uvc_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems) { struct uvc_fh *handle = container_of(sev->fh, struct uvc_fh, vfh); struct uvc_control_mapping *mapping; struct uvc_control *ctrl; int ret; ret = mutex_lock_interruptible(&handle->chain->ctrl_mutex); if (ret < 0) return -ERESTARTSYS; if (__uvc_query_v4l2_class(handle->chain, sev->id, 0) >= 0) { ret = 0; goto done; } ctrl = uvc_find_control(handle->chain, sev->id, &mapping); if (ctrl == NULL) { ret = -EINVAL; goto done; } list_add_tail(&sev->node, &mapping->ev_subs); if (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL) { struct v4l2_event ev; u32 changes = V4L2_EVENT_CTRL_CH_FLAGS; s32 val = 0; if (__uvc_ctrl_get(handle->chain, ctrl, mapping, &val) == 0) changes |= V4L2_EVENT_CTRL_CH_VALUE; uvc_ctrl_fill_event(handle->chain, &ev, ctrl, mapping, val, changes); /* * Mark the queue as active, allowing this initial event to be * accepted. */ sev->elems = elems; v4l2_event_queue_fh(sev->fh, &ev); } done: mutex_unlock(&handle->chain->ctrl_mutex); return ret; } static void uvc_ctrl_del_event(struct v4l2_subscribed_event *sev) { struct uvc_fh *handle = container_of(sev->fh, struct uvc_fh, vfh); mutex_lock(&handle->chain->ctrl_mutex); if (__uvc_query_v4l2_class(handle->chain, sev->id, 0) >= 0) goto done; list_del(&sev->node); done: mutex_unlock(&handle->chain->ctrl_mutex); } const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops = { .add = uvc_ctrl_add_event, .del = uvc_ctrl_del_event, .replace = v4l2_ctrl_replace, .merge = v4l2_ctrl_merge, }; /* -------------------------------------------------------------------------- * Control transactions * * To make extended set operations as atomic as the hardware allows, controls * are handled using begin/commit/rollback operations. * * At the beginning of a set request, uvc_ctrl_begin should be called to * initialize the request. This function acquires the control lock. * * When setting a control, the new value is stored in the control data field * at position UVC_CTRL_DATA_CURRENT. The control is then marked as dirty for * later processing. If the UVC and V4L2 control sizes differ, the current * value is loaded from the hardware before storing the new value in the data * field. * * After processing all controls in the transaction, uvc_ctrl_commit or * uvc_ctrl_rollback must be called to apply the pending changes to the * hardware or revert them. When applying changes, all controls marked as * dirty will be modified in the UVC device, and the dirty flag will be * cleared. When reverting controls, the control data field * UVC_CTRL_DATA_CURRENT is reverted to its previous value * (UVC_CTRL_DATA_BACKUP) for all dirty controls. Both functions release the * control lock. */ int uvc_ctrl_begin(struct uvc_video_chain *chain) { return mutex_lock_interruptible(&chain->ctrl_mutex) ? -ERESTARTSYS : 0; } static int uvc_ctrl_commit_entity(struct uvc_device *dev, struct uvc_entity *entity, int rollback, struct uvc_control **err_ctrl) { struct uvc_control *ctrl; unsigned int i; int ret; if (entity == NULL) return 0; for (i = 0; i < entity->ncontrols; ++i) { ctrl = &entity->controls[i]; if (!ctrl->initialized) continue; /* * Reset the loaded flag for auto-update controls that were * marked as loaded in uvc_ctrl_get/uvc_ctrl_set to prevent * uvc_ctrl_get from using the cached value, and for write-only * controls to prevent uvc_ctrl_set from setting bits not * explicitly set by the user. */ if (ctrl->info.flags & UVC_CTRL_FLAG_AUTO_UPDATE || !(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) ctrl->loaded = 0; if (!ctrl->dirty) continue; if (!rollback) ret = uvc_query_ctrl(dev, UVC_SET_CUR, ctrl->entity->id, dev->intfnum, ctrl->info.selector, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), ctrl->info.size); else ret = 0; if (rollback || ret < 0) memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), ctrl->info.size); ctrl->dirty = 0; if (ret < 0) { if (err_ctrl) *err_ctrl = ctrl; return ret; } } return 0; } static int uvc_ctrl_find_ctrl_idx(struct uvc_entity *entity, struct v4l2_ext_controls *ctrls, struct uvc_control *uvc_control) { struct uvc_control_mapping *mapping = NULL; struct uvc_control *ctrl_found = NULL; unsigned int i; if (!entity) return ctrls->count; for (i = 0; i < ctrls->count; i++) { __uvc_find_control(entity, ctrls->controls[i].id, &mapping, &ctrl_found, 0); if (uvc_control == ctrl_found) return i; } return ctrls->count; } int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback, struct v4l2_ext_controls *ctrls) { struct uvc_video_chain *chain = handle->chain; struct uvc_control *err_ctrl; struct uvc_entity *entity; int ret = 0; /* Find the control. */ list_for_each_entry(entity, &chain->entities, chain) { ret = uvc_ctrl_commit_entity(chain->dev, entity, rollback, &err_ctrl); if (ret < 0) { if (ctrls) ctrls->error_idx = uvc_ctrl_find_ctrl_idx(entity, ctrls, err_ctrl); goto done; } } if (!rollback) uvc_ctrl_send_events(handle, ctrls->controls, ctrls->count); done: mutex_unlock(&chain->ctrl_mutex); return ret; } int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl) { struct uvc_control *ctrl; struct uvc_control_mapping *mapping; if (__uvc_query_v4l2_class(chain, xctrl->id, 0) >= 0) return -EACCES; ctrl = uvc_find_control(chain, xctrl->id, &mapping); if (ctrl == NULL) return -EINVAL; return __uvc_ctrl_get(chain, ctrl, mapping, &xctrl->value); } int uvc_ctrl_set(struct uvc_fh *handle, struct v4l2_ext_control *xctrl) { struct uvc_video_chain *chain = handle->chain; struct uvc_control *ctrl; struct uvc_control_mapping *mapping; s32 value; u32 step; s32 min; s32 max; int ret; if (__uvc_query_v4l2_class(chain, xctrl->id, 0) >= 0) return -EACCES; ctrl = uvc_find_control(chain, xctrl->id, &mapping); if (ctrl == NULL) return -EINVAL; if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR)) return -EACCES; /* Clamp out of range values. */ switch (mapping->v4l2_type) { case V4L2_CTRL_TYPE_INTEGER: if (!ctrl->cached) { ret = uvc_ctrl_populate_cache(chain, ctrl); if (ret < 0) return ret; } min = mapping->get(mapping, UVC_GET_MIN, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN)); max = mapping->get(mapping, UVC_GET_MAX, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX)); step = mapping->get(mapping, UVC_GET_RES, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); if (step == 0) step = 1; xctrl->value = min + DIV_ROUND_CLOSEST((u32)(xctrl->value - min), step) * step; if (mapping->data_type == UVC_CTRL_DATA_TYPE_SIGNED) xctrl->value = clamp(xctrl->value, min, max); else xctrl->value = clamp_t(u32, xctrl->value, min, max); value = xctrl->value; break; case V4L2_CTRL_TYPE_BITMASK: if (!ctrl->cached) { ret = uvc_ctrl_populate_cache(chain, ctrl); if (ret < 0) return ret; } xctrl->value &= uvc_get_ctrl_bitmap(ctrl, mapping); value = xctrl->value; break; case V4L2_CTRL_TYPE_BOOLEAN: xctrl->value = clamp(xctrl->value, 0, 1); value = xctrl->value; break; case V4L2_CTRL_TYPE_MENU: if (xctrl->value < (ffs(mapping->menu_mask) - 1) || xctrl->value > (fls(mapping->menu_mask) - 1)) return -ERANGE; if (!test_bit(xctrl->value, &mapping->menu_mask)) return -EINVAL; value = uvc_mapping_get_menu_value(mapping, xctrl->value); /* * Valid menu indices are reported by the GET_RES request for * UVC controls that support it. */ if (mapping->data_type == UVC_CTRL_DATA_TYPE_BITMASK) { if (!ctrl->cached) { ret = uvc_ctrl_populate_cache(chain, ctrl); if (ret < 0) return ret; } if (!(uvc_get_ctrl_bitmap(ctrl, mapping) & value)) return -EINVAL; } break; default: value = xctrl->value; break; } /* * If the mapping doesn't span the whole UVC control, the current value * needs to be loaded from the device to perform the read-modify-write * operation. */ if ((ctrl->info.size * 8) != mapping->size) { ret = __uvc_ctrl_load_cur(chain, ctrl); if (ret < 0) return ret; } /* Backup the current value in case we need to rollback later. */ if (!ctrl->dirty) { memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), ctrl->info.size); } mapping->set(mapping, value, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); if (ctrl->info.flags & UVC_CTRL_FLAG_ASYNCHRONOUS) ctrl->handle = handle; ctrl->dirty = 1; ctrl->modified = 1; return 0; } /* -------------------------------------------------------------------------- * Dynamic controls */ /* * Retrieve flags for a given control */ static int uvc_ctrl_get_flags(struct uvc_device *dev, const struct uvc_control *ctrl, struct uvc_control_info *info) { u8 *data; int ret; data = kmalloc(1, GFP_KERNEL); if (data == NULL) return -ENOMEM; if (ctrl->entity->get_info) ret = ctrl->entity->get_info(dev, ctrl->entity, ctrl->info.selector, data); else ret = uvc_query_ctrl(dev, UVC_GET_INFO, ctrl->entity->id, dev->intfnum, info->selector, data, 1); if (!ret) { info->flags &= ~(UVC_CTRL_FLAG_GET_CUR | UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_AUTO_UPDATE | UVC_CTRL_FLAG_ASYNCHRONOUS); info->flags |= (data[0] & UVC_CONTROL_CAP_GET ? UVC_CTRL_FLAG_GET_CUR : 0) | (data[0] & UVC_CONTROL_CAP_SET ? UVC_CTRL_FLAG_SET_CUR : 0) | (data[0] & UVC_CONTROL_CAP_AUTOUPDATE ? UVC_CTRL_FLAG_AUTO_UPDATE : 0) | (data[0] & UVC_CONTROL_CAP_ASYNCHRONOUS ? UVC_CTRL_FLAG_ASYNCHRONOUS : 0); } kfree(data); return ret; } static void uvc_ctrl_fixup_xu_info(struct uvc_device *dev, const struct uvc_control *ctrl, struct uvc_control_info *info) { struct uvc_ctrl_fixup { struct usb_device_id id; u8 entity; u8 selector; u8 flags; }; static const struct uvc_ctrl_fixup fixups[] = { { { USB_DEVICE(0x046d, 0x08c2) }, 9, 1, UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_AUTO_UPDATE }, { { USB_DEVICE(0x046d, 0x08cc) }, 9, 1, UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_AUTO_UPDATE }, { { USB_DEVICE(0x046d, 0x0994) }, 9, 1, UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_AUTO_UPDATE }, }; unsigned int i; for (i = 0; i < ARRAY_SIZE(fixups); ++i) { if (!usb_match_one_id(dev->intf, &fixups[i].id)) continue; if (fixups[i].entity == ctrl->entity->id && fixups[i].selector == info->selector) { info->flags = fixups[i].flags; return; } } } /* * Query control information (size and flags) for XU controls. */ static int uvc_ctrl_fill_xu_info(struct uvc_device *dev, const struct uvc_control *ctrl, struct uvc_control_info *info) { u8 *data; int ret; data = kmalloc(2, GFP_KERNEL); if (data == NULL) return -ENOMEM; memcpy(info->entity, ctrl->entity->guid, sizeof(info->entity)); info->index = ctrl->index; info->selector = ctrl->index + 1; /* Query and verify the control length (GET_LEN) */ ret = uvc_query_ctrl(dev, UVC_GET_LEN, ctrl->entity->id, dev->intfnum, info->selector, data, 2); if (ret < 0) { uvc_dbg(dev, CONTROL, "GET_LEN failed on control %pUl/%u (%d)\n", info->entity, info->selector, ret); goto done; } info->size = le16_to_cpup((__le16 *)data); info->flags = UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES | UVC_CTRL_FLAG_GET_DEF; ret = uvc_ctrl_get_flags(dev, ctrl, info); if (ret < 0) { uvc_dbg(dev, CONTROL, "Failed to get flags for control %pUl/%u (%d)\n", info->entity, info->selector, ret); goto done; } uvc_ctrl_fixup_xu_info(dev, ctrl, info); uvc_dbg(dev, CONTROL, "XU control %pUl/%u queried: len %u, flags { get %u set %u auto %u }\n", info->entity, info->selector, info->size, (info->flags & UVC_CTRL_FLAG_GET_CUR) ? 1 : 0, (info->flags & UVC_CTRL_FLAG_SET_CUR) ? 1 : 0, (info->flags & UVC_CTRL_FLAG_AUTO_UPDATE) ? 1 : 0); done: kfree(data); return ret; } static int uvc_ctrl_add_info(struct uvc_device *dev, struct uvc_control *ctrl, const struct uvc_control_info *info); static int uvc_ctrl_init_xu_ctrl(struct uvc_device *dev, struct uvc_control *ctrl) { struct uvc_control_info info; int ret; if (ctrl->initialized) return 0; ret = uvc_ctrl_fill_xu_info(dev, ctrl, &info); if (ret < 0) return ret; ret = uvc_ctrl_add_info(dev, ctrl, &info); if (ret < 0) uvc_dbg(dev, CONTROL, "Failed to initialize control %pUl/%u on device %s entity %u\n", info.entity, info.selector, dev->udev->devpath, ctrl->entity->id); return ret; } int uvc_xu_ctrl_query(struct uvc_video_chain *chain, struct uvc_xu_control_query *xqry) { struct uvc_entity *entity, *iter; struct uvc_control *ctrl; unsigned int i; bool found; u32 reqflags; u16 size; u8 *data = NULL; int ret; /* Find the extension unit. */ entity = NULL; list_for_each_entry(iter, &chain->entities, chain) { if (UVC_ENTITY_TYPE(iter) == UVC_VC_EXTENSION_UNIT && iter->id == xqry->unit) { entity = iter; break; } } if (!entity) { uvc_dbg(chain->dev, CONTROL, "Extension unit %u not found\n", xqry->unit); return -ENOENT; } /* Find the control and perform delayed initialization if needed. */ found = false; for (i = 0; i < entity->ncontrols; ++i) { ctrl = &entity->controls[i]; if (ctrl->index == xqry->selector - 1) { found = true; break; } } if (!found) { uvc_dbg(chain->dev, CONTROL, "Control %pUl/%u not found\n", entity->guid, xqry->selector); return -ENOENT; } if (mutex_lock_interruptible(&chain->ctrl_mutex)) return -ERESTARTSYS; ret = uvc_ctrl_init_xu_ctrl(chain->dev, ctrl); if (ret < 0) { ret = -ENOENT; goto done; } /* Validate the required buffer size and flags for the request */ reqflags = 0; size = ctrl->info.size; switch (xqry->query) { case UVC_GET_CUR: reqflags = UVC_CTRL_FLAG_GET_CUR; break; case UVC_GET_MIN: reqflags = UVC_CTRL_FLAG_GET_MIN; break; case UVC_GET_MAX: reqflags = UVC_CTRL_FLAG_GET_MAX; break; case UVC_GET_DEF: reqflags = UVC_CTRL_FLAG_GET_DEF; break; case UVC_GET_RES: reqflags = UVC_CTRL_FLAG_GET_RES; break; case UVC_SET_CUR: reqflags = UVC_CTRL_FLAG_SET_CUR; break; case UVC_GET_LEN: size = 2; break; case UVC_GET_INFO: size = 1; break; default: ret = -EINVAL; goto done; } if (size != xqry->size) { ret = -ENOBUFS; goto done; } if (reqflags && !(ctrl->info.flags & reqflags)) { ret = -EBADRQC; goto done; } data = kmalloc(size, GFP_KERNEL); if (data == NULL) { ret = -ENOMEM; goto done; } if (xqry->query == UVC_SET_CUR && copy_from_user(data, xqry->data, size)) { ret = -EFAULT; goto done; } ret = uvc_query_ctrl(chain->dev, xqry->query, xqry->unit, chain->dev->intfnum, xqry->selector, data, size); if (ret < 0) goto done; if (xqry->query != UVC_SET_CUR && copy_to_user(xqry->data, data, size)) ret = -EFAULT; done: kfree(data); mutex_unlock(&chain->ctrl_mutex); return ret; } /* -------------------------------------------------------------------------- * Suspend/resume */ /* * Restore control values after resume, skipping controls that haven't been * changed. * * TODO * - Don't restore modified controls that are back to their default value. * - Handle restore order (Auto-Exposure Mode should be restored before * Exposure Time). */ int uvc_ctrl_restore_values(struct uvc_device *dev) { struct uvc_control *ctrl; struct uvc_entity *entity; unsigned int i; int ret; /* Walk the entities list and restore controls when possible. */ list_for_each_entry(entity, &dev->entities, list) { for (i = 0; i < entity->ncontrols; ++i) { ctrl = &entity->controls[i]; if (!ctrl->initialized || !ctrl->modified || (ctrl->info.flags & UVC_CTRL_FLAG_RESTORE) == 0) continue; dev_dbg(&dev->udev->dev, "restoring control %pUl/%u/%u\n", ctrl->info.entity, ctrl->info.index, ctrl->info.selector); ctrl->dirty = 1; } ret = uvc_ctrl_commit_entity(dev, entity, 0, NULL); if (ret < 0) return ret; } return 0; } /* -------------------------------------------------------------------------- * Control and mapping handling */ /* * Add control information to a given control. */ static int uvc_ctrl_add_info(struct uvc_device *dev, struct uvc_control *ctrl, const struct uvc_control_info *info) { ctrl->info = *info; INIT_LIST_HEAD(&ctrl->info.mappings); /* Allocate an array to save control values (cur, def, max, etc.) */ ctrl->uvc_data = kzalloc(ctrl->info.size * UVC_CTRL_DATA_LAST + 1, GFP_KERNEL); if (!ctrl->uvc_data) return -ENOMEM; ctrl->initialized = 1; uvc_dbg(dev, CONTROL, "Added control %pUl/%u to device %s entity %u\n", ctrl->info.entity, ctrl->info.selector, dev->udev->devpath, ctrl->entity->id); return 0; } /* * Add a control mapping to a given control. */ static int __uvc_ctrl_add_mapping(struct uvc_video_chain *chain, struct uvc_control *ctrl, const struct uvc_control_mapping *mapping) { struct uvc_control_mapping *map; unsigned int size; unsigned int i; /* * Most mappings come from static kernel data, and need to be duplicated. * Mappings that come from userspace will be unnecessarily duplicated, * this could be optimized. */ map = kmemdup(mapping, sizeof(*mapping), GFP_KERNEL); if (!map) return -ENOMEM; map->name = NULL; map->menu_names = NULL; map->menu_mapping = NULL; /* For UVCIOC_CTRL_MAP custom control */ if (mapping->name) { map->name = kstrdup(mapping->name, GFP_KERNEL); if (!map->name) goto err_nomem; } INIT_LIST_HEAD(&map->ev_subs); if (mapping->menu_mapping && mapping->menu_mask) { size = sizeof(mapping->menu_mapping[0]) * fls(mapping->menu_mask); map->menu_mapping = kmemdup(mapping->menu_mapping, size, GFP_KERNEL); if (!map->menu_mapping) goto err_nomem; } if (mapping->menu_names && mapping->menu_mask) { size = sizeof(mapping->menu_names[0]) * fls(mapping->menu_mask); map->menu_names = kmemdup(mapping->menu_names, size, GFP_KERNEL); if (!map->menu_names) goto err_nomem; } if (map->get == NULL) map->get = uvc_get_le_value; if (map->set == NULL) map->set = uvc_set_le_value; for (i = 0; i < ARRAY_SIZE(uvc_control_classes); i++) { if (V4L2_CTRL_ID2WHICH(uvc_control_classes[i]) == V4L2_CTRL_ID2WHICH(map->id)) { chain->ctrl_class_bitmap |= BIT(i); break; } } list_add_tail(&map->list, &ctrl->info.mappings); uvc_dbg(chain->dev, CONTROL, "Adding mapping '%s' to control %pUl/%u\n", uvc_map_get_name(map), ctrl->info.entity, ctrl->info.selector); return 0; err_nomem: kfree(map->menu_names); kfree(map->menu_mapping); kfree(map->name); kfree(map); return -ENOMEM; } int uvc_ctrl_add_mapping(struct uvc_video_chain *chain, const struct uvc_control_mapping *mapping) { struct uvc_device *dev = chain->dev; struct uvc_control_mapping *map; struct uvc_entity *entity; struct uvc_control *ctrl; int found = 0; int ret; if (mapping->id & ~V4L2_CTRL_ID_MASK) { uvc_dbg(dev, CONTROL, "Can't add mapping '%s', control id 0x%08x is invalid\n", uvc_map_get_name(mapping), mapping->id); return -EINVAL; } /* Search for the matching (GUID/CS) control on the current chain */ list_for_each_entry(entity, &chain->entities, chain) { unsigned int i; if (UVC_ENTITY_TYPE(entity) != UVC_VC_EXTENSION_UNIT || !uvc_entity_match_guid(entity, mapping->entity)) continue; for (i = 0; i < entity->ncontrols; ++i) { ctrl = &entity->controls[i]; if (ctrl->index == mapping->selector - 1) { found = 1; break; } } if (found) break; } if (!found) return -ENOENT; if (mutex_lock_interruptible(&chain->ctrl_mutex)) return -ERESTARTSYS; /* Perform delayed initialization of XU controls */ ret = uvc_ctrl_init_xu_ctrl(dev, ctrl); if (ret < 0) { ret = -ENOENT; goto done; } /* Validate the user-provided bit-size and offset */ if (mapping->size > 32 || mapping->offset + mapping->size > ctrl->info.size * 8) { ret = -EINVAL; goto done; } list_for_each_entry(map, &ctrl->info.mappings, list) { if (mapping->id == map->id) { uvc_dbg(dev, CONTROL, "Can't add mapping '%s', control id 0x%08x already exists\n", uvc_map_get_name(mapping), mapping->id); ret = -EEXIST; goto done; } } /* Prevent excess memory consumption */ if (atomic_inc_return(&dev->nmappings) > UVC_MAX_CONTROL_MAPPINGS) { atomic_dec(&dev->nmappings); uvc_dbg(dev, CONTROL, "Can't add mapping '%s', maximum mappings count (%u) exceeded\n", uvc_map_get_name(mapping), UVC_MAX_CONTROL_MAPPINGS); ret = -ENOMEM; goto done; } ret = __uvc_ctrl_add_mapping(chain, ctrl, mapping); if (ret < 0) atomic_dec(&dev->nmappings); done: mutex_unlock(&chain->ctrl_mutex); return ret; } /* * Prune an entity of its bogus controls using a blacklist. Bogus controls * are currently the ones that crash the camera or unconditionally return an * error when queried. */ static void uvc_ctrl_prune_entity(struct uvc_device *dev, struct uvc_entity *entity) { struct uvc_ctrl_blacklist { struct usb_device_id id; u8 index; }; static const struct uvc_ctrl_blacklist processing_blacklist[] = { { { USB_DEVICE(0x13d3, 0x509b) }, 9 }, /* Gain */ { { USB_DEVICE(0x1c4f, 0x3000) }, 6 }, /* WB Temperature */ { { USB_DEVICE(0x5986, 0x0241) }, 2 }, /* Hue */ }; static const struct uvc_ctrl_blacklist camera_blacklist[] = { { { USB_DEVICE(0x06f8, 0x3005) }, 9 }, /* Zoom, Absolute */ }; const struct uvc_ctrl_blacklist *blacklist; unsigned int size; unsigned int count; unsigned int i; u8 *controls; switch (UVC_ENTITY_TYPE(entity)) { case UVC_VC_PROCESSING_UNIT: blacklist = processing_blacklist; count = ARRAY_SIZE(processing_blacklist); controls = entity->processing.bmControls; size = entity->processing.bControlSize; break; case UVC_ITT_CAMERA: blacklist = camera_blacklist; count = ARRAY_SIZE(camera_blacklist); controls = entity->camera.bmControls; size = entity->camera.bControlSize; break; default: return; } for (i = 0; i < count; ++i) { if (!usb_match_one_id(dev->intf, &blacklist[i].id)) continue; if (blacklist[i].index >= 8 * size || !uvc_test_bit(controls, blacklist[i].index)) continue; uvc_dbg(dev, CONTROL, "%u/%u control is black listed, removing it\n", entity->id, blacklist[i].index); uvc_clear_bit(controls, blacklist[i].index); } } /* * Add control information and hardcoded stock control mappings to the given * device. */ static void uvc_ctrl_init_ctrl(struct uvc_video_chain *chain, struct uvc_control *ctrl) { unsigned int i; /* * XU controls initialization requires querying the device for control * information. As some buggy UVC devices will crash when queried * repeatedly in a tight loop, delay XU controls initialization until * first use. */ if (UVC_ENTITY_TYPE(ctrl->entity) == UVC_VC_EXTENSION_UNIT) return; for (i = 0; i < ARRAY_SIZE(uvc_ctrls); ++i) { const struct uvc_control_info *info = &uvc_ctrls[i]; if (uvc_entity_match_guid(ctrl->entity, info->entity) && ctrl->index == info->index) { uvc_ctrl_add_info(chain->dev, ctrl, info); /* * Retrieve control flags from the device. Ignore errors * and work with default flag values from the uvc_ctrl * array when the device doesn't properly implement * GET_INFO on standard controls. */ uvc_ctrl_get_flags(chain->dev, ctrl, &ctrl->info); break; } } if (!ctrl->initialized) return; /* Process common mappings. */ for (i = 0; i < ARRAY_SIZE(uvc_ctrl_mappings); ++i) { const struct uvc_control_mapping *mapping = &uvc_ctrl_mappings[i]; if (!uvc_entity_match_guid(ctrl->entity, mapping->entity) || ctrl->info.selector != mapping->selector) continue; /* Let the device provide a custom mapping. */ if (mapping->filter_mapping) { mapping = mapping->filter_mapping(chain, ctrl); if (!mapping) continue; } __uvc_ctrl_add_mapping(chain, ctrl, mapping); } } /* * Initialize device controls. */ static int uvc_ctrl_init_chain(struct uvc_video_chain *chain) { struct uvc_entity *entity; unsigned int i; /* Walk the entities list and instantiate controls */ list_for_each_entry(entity, &chain->entities, chain) { struct uvc_control *ctrl; unsigned int bControlSize = 0, ncontrols; u8 *bmControls = NULL; if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT) { bmControls = entity->extension.bmControls; bControlSize = entity->extension.bControlSize; } else if (UVC_ENTITY_TYPE(entity) == UVC_VC_PROCESSING_UNIT) { bmControls = entity->processing.bmControls; bControlSize = entity->processing.bControlSize; } else if (UVC_ENTITY_TYPE(entity) == UVC_ITT_CAMERA) { bmControls = entity->camera.bmControls; bControlSize = entity->camera.bControlSize; } else if (UVC_ENTITY_TYPE(entity) == UVC_EXT_GPIO_UNIT) { bmControls = entity->gpio.bmControls; bControlSize = entity->gpio.bControlSize; } /* Remove bogus/blacklisted controls */ uvc_ctrl_prune_entity(chain->dev, entity); /* Count supported controls and allocate the controls array */ ncontrols = memweight(bmControls, bControlSize); if (ncontrols == 0) continue; entity->controls = kcalloc(ncontrols, sizeof(*ctrl), GFP_KERNEL); if (entity->controls == NULL) return -ENOMEM; entity->ncontrols = ncontrols; /* Initialize all supported controls */ ctrl = entity->controls; for (i = 0; i < bControlSize * 8; ++i) { if (uvc_test_bit(bmControls, i) == 0) continue; ctrl->entity = entity; ctrl->index = i; uvc_ctrl_init_ctrl(chain, ctrl); ctrl++; } } return 0; } int uvc_ctrl_init_device(struct uvc_device *dev) { struct uvc_video_chain *chain; int ret; INIT_WORK(&dev->async_ctrl.work, uvc_ctrl_status_event_work); list_for_each_entry(chain, &dev->chains, list) { ret = uvc_ctrl_init_chain(chain); if (ret) return ret; } return 0; } /* * Cleanup device controls. */ static void uvc_ctrl_cleanup_mappings(struct uvc_device *dev, struct uvc_control *ctrl) { struct uvc_control_mapping *mapping, *nm; list_for_each_entry_safe(mapping, nm, &ctrl->info.mappings, list) { list_del(&mapping->list); kfree(mapping->menu_names); kfree(mapping->menu_mapping); kfree(mapping->name); kfree(mapping); } } void uvc_ctrl_cleanup_device(struct uvc_device *dev) { struct uvc_entity *entity; unsigned int i; /* Can be uninitialized if we are aborting on probe error. */ if (dev->async_ctrl.work.func) cancel_work_sync(&dev->async_ctrl.work); /* Free controls and control mappings for all entities. */ list_for_each_entry(entity, &dev->entities, list) { for (i = 0; i < entity->ncontrols; ++i) { struct uvc_control *ctrl = &entity->controls[i]; if (!ctrl->initialized) continue; uvc_ctrl_cleanup_mappings(dev, ctrl); kfree(ctrl->uvc_data); } kfree(entity->controls); } }
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