| /* |
| * uvc_ctrl.c -- USB Video Class driver - Controls |
| * |
| * Copyright (C) 2005-2008 |
| * Laurent Pinchart (laurent.pinchart@skynet.be) |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/version.h> |
| #include <linux/list.h> |
| #include <linux/module.h> |
| #include <linux/uaccess.h> |
| #include <linux/usb.h> |
| #include <linux/videodev2.h> |
| #include <linux/vmalloc.h> |
| #include <linux/wait.h> |
| #include <asm/atomic.h> |
| |
| #include "uvcvideo.h" |
| |
| #define UVC_CTRL_NDATA 2 |
| #define UVC_CTRL_DATA_CURRENT 0 |
| #define UVC_CTRL_DATA_BACKUP 1 |
| |
| /* ------------------------------------------------------------------------ |
| * Control, formats, ... |
| */ |
| |
| static struct uvc_control_info uvc_ctrls[] = { |
| { |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_BRIGHTNESS_CONTROL, |
| .index = 0, |
| .size = 2, |
| .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE |
| | UVC_CONTROL_RESTORE, |
| }, |
| { |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_CONTRAST_CONTROL, |
| .index = 1, |
| .size = 2, |
| .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE |
| | UVC_CONTROL_RESTORE, |
| }, |
| { |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_HUE_CONTROL, |
| .index = 2, |
| .size = 2, |
| .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE |
| | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE, |
| }, |
| { |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_SATURATION_CONTROL, |
| .index = 3, |
| .size = 2, |
| .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE |
| | UVC_CONTROL_RESTORE, |
| }, |
| { |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_SHARPNESS_CONTROL, |
| .index = 4, |
| .size = 2, |
| .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE |
| | UVC_CONTROL_RESTORE, |
| }, |
| { |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_GAMMA_CONTROL, |
| .index = 5, |
| .size = 2, |
| .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE |
| | UVC_CONTROL_RESTORE, |
| }, |
| { |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_BACKLIGHT_COMPENSATION_CONTROL, |
| .index = 8, |
| .size = 2, |
| .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE |
| | UVC_CONTROL_RESTORE, |
| }, |
| { |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_GAIN_CONTROL, |
| .index = 9, |
| .size = 2, |
| .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE |
| | UVC_CONTROL_RESTORE, |
| }, |
| { |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_POWER_LINE_FREQUENCY_CONTROL, |
| .index = 10, |
| .size = 1, |
| .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE |
| | UVC_CONTROL_RESTORE, |
| }, |
| { |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_HUE_AUTO_CONTROL, |
| .index = 11, |
| .size = 1, |
| .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR |
| | UVC_CONTROL_GET_DEF | UVC_CONTROL_RESTORE, |
| }, |
| { |
| .entity = UVC_GUID_UVC_CAMERA, |
| .selector = CT_AE_MODE_CONTROL, |
| .index = 1, |
| .size = 1, |
| .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR |
| | UVC_CONTROL_GET_DEF | UVC_CONTROL_GET_RES |
| | UVC_CONTROL_RESTORE, |
| }, |
| { |
| .entity = UVC_GUID_UVC_CAMERA, |
| .selector = CT_AE_PRIORITY_CONTROL, |
| .index = 2, |
| .size = 1, |
| .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR |
| | UVC_CONTROL_RESTORE, |
| }, |
| { |
| .entity = UVC_GUID_UVC_CAMERA, |
| .selector = CT_EXPOSURE_TIME_ABSOLUTE_CONTROL, |
| .index = 3, |
| .size = 4, |
| .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE |
| | UVC_CONTROL_RESTORE, |
| }, |
| { |
| .entity = UVC_GUID_UVC_CAMERA, |
| .selector = CT_FOCUS_ABSOLUTE_CONTROL, |
| .index = 5, |
| .size = 2, |
| .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE |
| | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE, |
| }, |
| { |
| .entity = UVC_GUID_UVC_CAMERA, |
| .selector = CT_FOCUS_AUTO_CONTROL, |
| .index = 17, |
| .size = 1, |
| .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR |
| | UVC_CONTROL_GET_DEF | UVC_CONTROL_RESTORE, |
| }, |
| { |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL, |
| .index = 12, |
| .size = 1, |
| .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR |
| | UVC_CONTROL_GET_DEF | UVC_CONTROL_RESTORE, |
| }, |
| { |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_WHITE_BALANCE_TEMPERATURE_CONTROL, |
| .index = 6, |
| .size = 2, |
| .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE |
| | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE, |
| }, |
| { |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL, |
| .index = 13, |
| .size = 1, |
| .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR |
| | UVC_CONTROL_GET_DEF | UVC_CONTROL_RESTORE, |
| }, |
| { |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_WHITE_BALANCE_COMPONENT_CONTROL, |
| .index = 7, |
| .size = 4, |
| .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE |
| | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE, |
| }, |
| }; |
| |
| static struct uvc_menu_info power_line_frequency_controls[] = { |
| { 0, "Disabled" }, |
| { 1, "50 Hz" }, |
| { 2, "60 Hz" }, |
| }; |
| |
| static struct uvc_menu_info exposure_auto_controls[] = { |
| { 2, "Auto Mode" }, |
| { 1, "Manual Mode" }, |
| { 4, "Shutter Priority Mode" }, |
| { 8, "Aperture Priority Mode" }, |
| }; |
| |
| static struct uvc_control_mapping uvc_ctrl_mappings[] = { |
| { |
| .id = V4L2_CID_BRIGHTNESS, |
| .name = "Brightness", |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_BRIGHTNESS_CONTROL, |
| .size = 16, |
| .offset = 0, |
| .v4l2_type = V4L2_CTRL_TYPE_INTEGER, |
| .data_type = UVC_CTRL_DATA_TYPE_SIGNED, |
| }, |
| { |
| .id = V4L2_CID_CONTRAST, |
| .name = "Contrast", |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_CONTRAST_CONTROL, |
| .size = 16, |
| .offset = 0, |
| .v4l2_type = V4L2_CTRL_TYPE_INTEGER, |
| .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, |
| }, |
| { |
| .id = V4L2_CID_HUE, |
| .name = "Hue", |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_HUE_CONTROL, |
| .size = 16, |
| .offset = 0, |
| .v4l2_type = V4L2_CTRL_TYPE_INTEGER, |
| .data_type = UVC_CTRL_DATA_TYPE_SIGNED, |
| }, |
| { |
| .id = V4L2_CID_SATURATION, |
| .name = "Saturation", |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_SATURATION_CONTROL, |
| .size = 16, |
| .offset = 0, |
| .v4l2_type = V4L2_CTRL_TYPE_INTEGER, |
| .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, |
| }, |
| { |
| .id = V4L2_CID_SHARPNESS, |
| .name = "Sharpness", |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_SHARPNESS_CONTROL, |
| .size = 16, |
| .offset = 0, |
| .v4l2_type = V4L2_CTRL_TYPE_INTEGER, |
| .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, |
| }, |
| { |
| .id = V4L2_CID_GAMMA, |
| .name = "Gamma", |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = 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, |
| .name = "Backlight Compensation", |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = 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, |
| .name = "Gain", |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_GAIN_CONTROL, |
| .size = 16, |
| .offset = 0, |
| .v4l2_type = V4L2_CTRL_TYPE_INTEGER, |
| .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, |
| }, |
| { |
| .id = V4L2_CID_POWER_LINE_FREQUENCY, |
| .name = "Power Line Frequency", |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_POWER_LINE_FREQUENCY_CONTROL, |
| .size = 2, |
| .offset = 0, |
| .v4l2_type = V4L2_CTRL_TYPE_MENU, |
| .data_type = UVC_CTRL_DATA_TYPE_ENUM, |
| .menu_info = power_line_frequency_controls, |
| .menu_count = ARRAY_SIZE(power_line_frequency_controls), |
| }, |
| { |
| .id = V4L2_CID_HUE_AUTO, |
| .name = "Hue, Auto", |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_HUE_AUTO_CONTROL, |
| .size = 1, |
| .offset = 0, |
| .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, |
| .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, |
| }, |
| { |
| .id = V4L2_CID_EXPOSURE_AUTO, |
| .name = "Exposure, Auto", |
| .entity = UVC_GUID_UVC_CAMERA, |
| .selector = CT_AE_MODE_CONTROL, |
| .size = 4, |
| .offset = 0, |
| .v4l2_type = V4L2_CTRL_TYPE_MENU, |
| .data_type = UVC_CTRL_DATA_TYPE_BITMASK, |
| .menu_info = exposure_auto_controls, |
| .menu_count = ARRAY_SIZE(exposure_auto_controls), |
| }, |
| { |
| .id = V4L2_CID_EXPOSURE_AUTO_PRIORITY, |
| .name = "Exposure, Auto Priority", |
| .entity = UVC_GUID_UVC_CAMERA, |
| .selector = 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, |
| .name = "Exposure (Absolute)", |
| .entity = UVC_GUID_UVC_CAMERA, |
| .selector = CT_EXPOSURE_TIME_ABSOLUTE_CONTROL, |
| .size = 32, |
| .offset = 0, |
| .v4l2_type = V4L2_CTRL_TYPE_INTEGER, |
| .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, |
| }, |
| { |
| .id = V4L2_CID_AUTO_WHITE_BALANCE, |
| .name = "White Balance Temperature, Auto", |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL, |
| .size = 1, |
| .offset = 0, |
| .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, |
| .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, |
| }, |
| { |
| .id = V4L2_CID_WHITE_BALANCE_TEMPERATURE, |
| .name = "White Balance Temperature", |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_WHITE_BALANCE_TEMPERATURE_CONTROL, |
| .size = 16, |
| .offset = 0, |
| .v4l2_type = V4L2_CTRL_TYPE_INTEGER, |
| .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, |
| }, |
| { |
| .id = V4L2_CID_AUTO_WHITE_BALANCE, |
| .name = "White Balance Component, Auto", |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL, |
| .size = 1, |
| .offset = 0, |
| .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, |
| .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, |
| }, |
| { |
| .id = V4L2_CID_BLUE_BALANCE, |
| .name = "White Balance Blue Component", |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_WHITE_BALANCE_COMPONENT_CONTROL, |
| .size = 16, |
| .offset = 0, |
| .v4l2_type = V4L2_CTRL_TYPE_INTEGER, |
| .data_type = UVC_CTRL_DATA_TYPE_SIGNED, |
| }, |
| { |
| .id = V4L2_CID_RED_BALANCE, |
| .name = "White Balance Red Component", |
| .entity = UVC_GUID_UVC_PROCESSING, |
| .selector = PU_WHITE_BALANCE_COMPONENT_CONTROL, |
| .size = 16, |
| .offset = 16, |
| .v4l2_type = V4L2_CTRL_TYPE_INTEGER, |
| .data_type = UVC_CTRL_DATA_TYPE_SIGNED, |
| }, |
| { |
| .id = V4L2_CID_FOCUS_ABSOLUTE, |
| .name = "Focus (absolute)", |
| .entity = UVC_GUID_UVC_CAMERA, |
| .selector = CT_FOCUS_ABSOLUTE_CONTROL, |
| .size = 16, |
| .offset = 0, |
| .v4l2_type = V4L2_CTRL_TYPE_INTEGER, |
| .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, |
| }, |
| { |
| .id = V4L2_CID_FOCUS_AUTO, |
| .name = "Focus, Auto", |
| .entity = UVC_GUID_UVC_CAMERA, |
| .selector = CT_FOCUS_AUTO_CONTROL, |
| .size = 1, |
| .offset = 0, |
| .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, |
| .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, |
| }, |
| }; |
| |
| /* ------------------------------------------------------------------------ |
| * Utility functions |
| */ |
| |
| static inline __u8 *uvc_ctrl_data(struct uvc_control *ctrl, int id) |
| { |
| return ctrl->data + id * ctrl->info->size; |
| } |
| |
| static inline int uvc_get_bit(const __u8 *data, int bit) |
| { |
| return (data[bit >> 3] >> (bit & 7)) & 1; |
| } |
| |
| /* 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(const __u8 *data, |
| struct uvc_control_mapping *mapping) |
| { |
| int bits = mapping->size; |
| int offset = mapping->offset; |
| __s32 value = 0; |
| __u8 mask; |
| |
| data += offset / 8; |
| offset &= 7; |
| mask = ((1LL << bits) - 1) << offset; |
| |
| for (; bits > 0; data++) { |
| __u8 byte = *data & mask; |
| value |= offset > 0 ? (byte >> offset) : (byte << (-offset)); |
| bits -= 8 - (offset > 0 ? offset : 0); |
| offset -= 8; |
| mask = (1 << bits) - 1; |
| } |
| |
| /* 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(__s32 value, __u8 *data, |
| struct uvc_control_mapping *mapping) |
| { |
| int bits = mapping->size; |
| int offset = mapping->offset; |
| __u8 mask; |
| |
| 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 const __u8 uvc_processing_guid[16] = UVC_GUID_UVC_PROCESSING; |
| static const __u8 uvc_camera_guid[16] = UVC_GUID_UVC_CAMERA; |
| static const __u8 uvc_media_transport_input_guid[16] = |
| UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT; |
| |
| static int uvc_entity_match_guid(struct uvc_entity *entity, __u8 guid[16]) |
| { |
| switch (UVC_ENTITY_TYPE(entity)) { |
| case ITT_CAMERA: |
| return memcmp(uvc_camera_guid, guid, 16) == 0; |
| |
| case ITT_MEDIA_TRANSPORT_INPUT: |
| return memcmp(uvc_media_transport_input_guid, guid, 16) == 0; |
| |
| case VC_PROCESSING_UNIT: |
| return memcmp(uvc_processing_guid, guid, 16) == 0; |
| |
| case VC_EXTENSION_UNIT: |
| return memcmp(entity->extension.guidExtensionCode, |
| guid, 16) == 0; |
| |
| default: |
| return 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->info == NULL) |
| 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; |
| } |
| } |
| } |
| } |
| |
| struct uvc_control *uvc_find_control(struct uvc_video_device *video, |
| __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. */ |
| __uvc_find_control(video->processing, v4l2_id, mapping, &ctrl, next); |
| if (ctrl && !next) |
| return ctrl; |
| |
| list_for_each_entry(entity, &video->iterms, chain) { |
| __uvc_find_control(entity, v4l2_id, mapping, &ctrl, next); |
| if (ctrl && !next) |
| return ctrl; |
| } |
| |
| list_for_each_entry(entity, &video->extensions, chain) { |
| __uvc_find_control(entity, v4l2_id, mapping, &ctrl, next); |
| if (ctrl && !next) |
| return ctrl; |
| } |
| |
| if (ctrl == NULL && !next) |
| uvc_trace(UVC_TRACE_CONTROL, "Control 0x%08x not found.\n", |
| v4l2_id); |
| |
| return ctrl; |
| } |
| |
| int uvc_query_v4l2_ctrl(struct uvc_video_device *video, |
| struct v4l2_queryctrl *v4l2_ctrl) |
| { |
| struct uvc_control *ctrl; |
| struct uvc_control_mapping *mapping; |
| struct uvc_menu_info *menu; |
| unsigned int i; |
| __u8 *data; |
| int ret; |
| |
| ctrl = uvc_find_control(video, v4l2_ctrl->id, &mapping); |
| if (ctrl == NULL) |
| return -EINVAL; |
| |
| data = kmalloc(8, GFP_KERNEL); |
| if (data == NULL) |
| return -ENOMEM; |
| |
| memset(v4l2_ctrl, 0, sizeof *v4l2_ctrl); |
| v4l2_ctrl->id = mapping->id; |
| v4l2_ctrl->type = mapping->v4l2_type; |
| strncpy(v4l2_ctrl->name, mapping->name, sizeof v4l2_ctrl->name); |
| v4l2_ctrl->flags = 0; |
| |
| if (!(ctrl->info->flags & UVC_CONTROL_SET_CUR)) |
| v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; |
| |
| if (ctrl->info->flags & UVC_CONTROL_GET_DEF) { |
| if ((ret = uvc_query_ctrl(video->dev, GET_DEF, ctrl->entity->id, |
| video->dev->intfnum, ctrl->info->selector, |
| data, ctrl->info->size)) < 0) |
| goto out; |
| v4l2_ctrl->default_value = uvc_get_le_value(data, mapping); |
| } |
| |
| switch (mapping->v4l2_type) { |
| case V4L2_CTRL_TYPE_MENU: |
| v4l2_ctrl->minimum = 0; |
| v4l2_ctrl->maximum = mapping->menu_count - 1; |
| v4l2_ctrl->step = 1; |
| |
| menu = mapping->menu_info; |
| for (i = 0; i < mapping->menu_count; ++i, ++menu) { |
| if (menu->value == v4l2_ctrl->default_value) { |
| v4l2_ctrl->default_value = i; |
| break; |
| } |
| } |
| |
| ret = 0; |
| goto out; |
| |
| case V4L2_CTRL_TYPE_BOOLEAN: |
| v4l2_ctrl->minimum = 0; |
| v4l2_ctrl->maximum = 1; |
| v4l2_ctrl->step = 1; |
| ret = 0; |
| goto out; |
| |
| default: |
| break; |
| } |
| |
| if (ctrl->info->flags & UVC_CONTROL_GET_MIN) { |
| if ((ret = uvc_query_ctrl(video->dev, GET_MIN, ctrl->entity->id, |
| video->dev->intfnum, ctrl->info->selector, |
| data, ctrl->info->size)) < 0) |
| goto out; |
| v4l2_ctrl->minimum = uvc_get_le_value(data, mapping); |
| } |
| if (ctrl->info->flags & UVC_CONTROL_GET_MAX) { |
| if ((ret = uvc_query_ctrl(video->dev, GET_MAX, ctrl->entity->id, |
| video->dev->intfnum, ctrl->info->selector, |
| data, ctrl->info->size)) < 0) |
| goto out; |
| v4l2_ctrl->maximum = uvc_get_le_value(data, mapping); |
| } |
| if (ctrl->info->flags & UVC_CONTROL_GET_RES) { |
| if ((ret = uvc_query_ctrl(video->dev, GET_RES, ctrl->entity->id, |
| video->dev->intfnum, ctrl->info->selector, |
| data, ctrl->info->size)) < 0) |
| goto out; |
| v4l2_ctrl->step = uvc_get_le_value(data, mapping); |
| } |
| |
| ret = 0; |
| out: |
| kfree(data); |
| return ret; |
| } |
| |
| |
| /* -------------------------------------------------------------------------- |
| * 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_device *video) |
| { |
| return mutex_lock_interruptible(&video->ctrl_mutex) ? -ERESTARTSYS : 0; |
| } |
| |
| static int uvc_ctrl_commit_entity(struct uvc_device *dev, |
| struct uvc_entity *entity, int rollback) |
| { |
| 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->info == NULL || !ctrl->dirty) |
| continue; |
| |
| if (!rollback) |
| ret = uvc_query_ctrl(dev, 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); |
| |
| if ((ctrl->info->flags & UVC_CONTROL_GET_CUR) == 0) |
| ctrl->loaded = 0; |
| |
| ctrl->dirty = 0; |
| |
| if (ret < 0) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| int __uvc_ctrl_commit(struct uvc_video_device *video, int rollback) |
| { |
| struct uvc_entity *entity; |
| int ret = 0; |
| |
| /* Find the control. */ |
| ret = uvc_ctrl_commit_entity(video->dev, video->processing, rollback); |
| if (ret < 0) |
| goto done; |
| |
| list_for_each_entry(entity, &video->iterms, chain) { |
| ret = uvc_ctrl_commit_entity(video->dev, entity, rollback); |
| if (ret < 0) |
| goto done; |
| } |
| |
| list_for_each_entry(entity, &video->extensions, chain) { |
| ret = uvc_ctrl_commit_entity(video->dev, entity, rollback); |
| if (ret < 0) |
| goto done; |
| } |
| |
| done: |
| mutex_unlock(&video->ctrl_mutex); |
| return ret; |
| } |
| |
| int uvc_ctrl_get(struct uvc_video_device *video, |
| struct v4l2_ext_control *xctrl) |
| { |
| struct uvc_control *ctrl; |
| struct uvc_control_mapping *mapping; |
| struct uvc_menu_info *menu; |
| unsigned int i; |
| int ret; |
| |
| ctrl = uvc_find_control(video, xctrl->id, &mapping); |
| if (ctrl == NULL || (ctrl->info->flags & UVC_CONTROL_GET_CUR) == 0) |
| return -EINVAL; |
| |
| if (!ctrl->loaded) { |
| ret = uvc_query_ctrl(video->dev, GET_CUR, ctrl->entity->id, |
| video->dev->intfnum, ctrl->info->selector, |
| uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
| ctrl->info->size); |
| if (ret < 0) |
| return ret; |
| |
| if ((ctrl->info->flags & UVC_CONTROL_AUTO_UPDATE) == 0) |
| ctrl->loaded = 1; |
| } |
| |
| xctrl->value = uvc_get_le_value( |
| uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), mapping); |
| |
| if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) { |
| menu = mapping->menu_info; |
| for (i = 0; i < mapping->menu_count; ++i, ++menu) { |
| if (menu->value == xctrl->value) { |
| xctrl->value = i; |
| break; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| int uvc_ctrl_set(struct uvc_video_device *video, |
| struct v4l2_ext_control *xctrl) |
| { |
| struct uvc_control *ctrl; |
| struct uvc_control_mapping *mapping; |
| s32 value = xctrl->value; |
| int ret; |
| |
| ctrl = uvc_find_control(video, xctrl->id, &mapping); |
| if (ctrl == NULL || (ctrl->info->flags & UVC_CONTROL_SET_CUR) == 0) |
| return -EINVAL; |
| |
| if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) { |
| if (value < 0 || value >= mapping->menu_count) |
| return -EINVAL; |
| value = mapping->menu_info[value].value; |
| } |
| |
| if (!ctrl->loaded && (ctrl->info->size * 8) != mapping->size) { |
| if ((ctrl->info->flags & UVC_CONTROL_GET_CUR) == 0) { |
| memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
| 0, ctrl->info->size); |
| } else { |
| ret = uvc_query_ctrl(video->dev, GET_CUR, |
| ctrl->entity->id, video->dev->intfnum, |
| ctrl->info->selector, |
| uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
| ctrl->info->size); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if ((ctrl->info->flags & UVC_CONTROL_AUTO_UPDATE) == 0) |
| ctrl->loaded = 1; |
| } |
| |
| if (!ctrl->dirty) { |
| memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), |
| uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
| ctrl->info->size); |
| } |
| |
| uvc_set_le_value(value, |
| uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), mapping); |
| |
| ctrl->dirty = 1; |
| ctrl->modified = 1; |
| return 0; |
| } |
| |
| /* -------------------------------------------------------------------------- |
| * Dynamic controls |
| */ |
| |
| int uvc_xu_ctrl_query(struct uvc_video_device *video, |
| struct uvc_xu_control *xctrl, int set) |
| { |
| struct uvc_entity *entity; |
| struct uvc_control *ctrl = NULL; |
| unsigned int i, found = 0; |
| __u8 *data; |
| int ret; |
| |
| /* Find the extension unit. */ |
| list_for_each_entry(entity, &video->extensions, chain) { |
| if (entity->id == xctrl->unit) |
| break; |
| } |
| |
| if (entity->id != xctrl->unit) { |
| uvc_trace(UVC_TRACE_CONTROL, "Extension unit %u not found.\n", |
| xctrl->unit); |
| return -EINVAL; |
| } |
| |
| /* Find the control. */ |
| for (i = 0; i < entity->ncontrols; ++i) { |
| ctrl = &entity->controls[i]; |
| if (ctrl->info == NULL) |
| continue; |
| |
| if (ctrl->info->selector == xctrl->selector) { |
| found = 1; |
| break; |
| } |
| } |
| |
| if (!found) { |
| uvc_trace(UVC_TRACE_CONTROL, |
| "Control " UVC_GUID_FORMAT "/%u not found.\n", |
| UVC_GUID_ARGS(entity->extension.guidExtensionCode), |
| xctrl->selector); |
| return -EINVAL; |
| } |
| |
| /* Validate control data size. */ |
| if (ctrl->info->size != xctrl->size) |
| return -EINVAL; |
| |
| if ((set && !(ctrl->info->flags & UVC_CONTROL_SET_CUR)) || |
| (!set && !(ctrl->info->flags & UVC_CONTROL_GET_CUR))) |
| return -EINVAL; |
| |
| if (mutex_lock_interruptible(&video->ctrl_mutex)) |
| return -ERESTARTSYS; |
| |
| memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), |
| uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
| xctrl->size); |
| data = uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT); |
| |
| if (set && copy_from_user(data, xctrl->data, xctrl->size)) { |
| ret = -EFAULT; |
| goto out; |
| } |
| |
| ret = uvc_query_ctrl(video->dev, set ? SET_CUR : GET_CUR, xctrl->unit, |
| video->dev->intfnum, xctrl->selector, data, |
| xctrl->size); |
| if (ret < 0) |
| goto out; |
| |
| if (!set && copy_to_user(xctrl->data, data, xctrl->size)) { |
| ret = -EFAULT; |
| goto out; |
| } |
| |
| out: |
| if (ret) |
| memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
| uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), |
| xctrl->size); |
| |
| mutex_unlock(&video->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_resume_device(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->info == NULL || !ctrl->modified || |
| (ctrl->info->flags & UVC_CONTROL_RESTORE) == 0) |
| continue; |
| |
| printk(KERN_INFO "restoring control " UVC_GUID_FORMAT |
| "/%u/%u\n", UVC_GUID_ARGS(ctrl->info->entity), |
| ctrl->info->index, ctrl->info->selector); |
| ctrl->dirty = 1; |
| } |
| |
| ret = uvc_ctrl_commit_entity(dev, entity, 0); |
| if (ret < 0) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| /* -------------------------------------------------------------------------- |
| * Control and mapping handling |
| */ |
| |
| static void uvc_ctrl_add_ctrl(struct uvc_device *dev, |
| struct uvc_control_info *info) |
| { |
| struct uvc_entity *entity; |
| struct uvc_control *ctrl = NULL; |
| int ret, found = 0; |
| unsigned int i; |
| |
| list_for_each_entry(entity, &dev->entities, list) { |
| if (!uvc_entity_match_guid(entity, info->entity)) |
| continue; |
| |
| for (i = 0; i < entity->ncontrols; ++i) { |
| ctrl = &entity->controls[i]; |
| if (ctrl->index == info->index) { |
| found = 1; |
| break; |
| } |
| } |
| |
| if (found) |
| break; |
| } |
| |
| if (!found) |
| return; |
| |
| if (UVC_ENTITY_TYPE(entity) == VC_EXTENSION_UNIT) { |
| /* Check if the device control information and length match |
| * the user supplied information. |
| */ |
| __u32 flags; |
| __le16 size; |
| __u8 inf; |
| |
| if ((ret = uvc_query_ctrl(dev, GET_LEN, ctrl->entity->id, |
| dev->intfnum, info->selector, (__u8 *)&size, 2)) < 0) { |
| uvc_trace(UVC_TRACE_CONTROL, "GET_LEN failed on " |
| "control " UVC_GUID_FORMAT "/%u (%d).\n", |
| UVC_GUID_ARGS(info->entity), info->selector, |
| ret); |
| return; |
| } |
| |
| if (info->size != le16_to_cpu(size)) { |
| uvc_trace(UVC_TRACE_CONTROL, "Control " UVC_GUID_FORMAT |
| "/%u size doesn't match user supplied " |
| "value.\n", UVC_GUID_ARGS(info->entity), |
| info->selector); |
| return; |
| } |
| |
| if ((ret = uvc_query_ctrl(dev, GET_INFO, ctrl->entity->id, |
| dev->intfnum, info->selector, &inf, 1)) < 0) { |
| uvc_trace(UVC_TRACE_CONTROL, "GET_INFO failed on " |
| "control " UVC_GUID_FORMAT "/%u (%d).\n", |
| UVC_GUID_ARGS(info->entity), info->selector, |
| ret); |
| return; |
| } |
| |
| flags = info->flags; |
| if (((flags & UVC_CONTROL_GET_CUR) && !(inf & (1 << 0))) || |
| ((flags & UVC_CONTROL_SET_CUR) && !(inf & (1 << 1)))) { |
| uvc_trace(UVC_TRACE_CONTROL, "Control " |
| UVC_GUID_FORMAT "/%u flags don't match " |
| "supported operations.\n", |
| UVC_GUID_ARGS(info->entity), info->selector); |
| return; |
| } |
| } |
| |
| ctrl->info = info; |
| ctrl->data = kmalloc(ctrl->info->size * UVC_CTRL_NDATA, GFP_KERNEL); |
| uvc_trace(UVC_TRACE_CONTROL, "Added control " UVC_GUID_FORMAT "/%u " |
| "to device %s entity %u\n", UVC_GUID_ARGS(ctrl->info->entity), |
| ctrl->info->selector, dev->udev->devpath, entity->id); |
| } |
| |
| /* |
| * Add an item to the UVC control information list, and instantiate a control |
| * structure for each device that supports the control. |
| */ |
| int uvc_ctrl_add_info(struct uvc_control_info *info) |
| { |
| struct uvc_control_info *ctrl; |
| struct uvc_device *dev; |
| int ret = 0; |
| |
| /* Find matching controls by walking the devices, entities and |
| * controls list. |
| */ |
| mutex_lock(&uvc_driver.ctrl_mutex); |
| |
| /* First check if the list contains a control matching the new one. |
| * Bail out if it does. |
| */ |
| list_for_each_entry(ctrl, &uvc_driver.controls, list) { |
| if (memcmp(ctrl->entity, info->entity, 16)) |
| continue; |
| |
| if (ctrl->selector == info->selector) { |
| uvc_trace(UVC_TRACE_CONTROL, "Control " |
| UVC_GUID_FORMAT "/%u is already defined.\n", |
| UVC_GUID_ARGS(info->entity), info->selector); |
| ret = -EEXIST; |
| goto end; |
| } |
| if (ctrl->index == info->index) { |
| uvc_trace(UVC_TRACE_CONTROL, "Control " |
| UVC_GUID_FORMAT "/%u would overwrite index " |
| "%d.\n", UVC_GUID_ARGS(info->entity), |
| info->selector, info->index); |
| ret = -EEXIST; |
| goto end; |
| } |
| } |
| |
| list_for_each_entry(dev, &uvc_driver.devices, list) |
| uvc_ctrl_add_ctrl(dev, info); |
| |
| INIT_LIST_HEAD(&info->mappings); |
| list_add_tail(&info->list, &uvc_driver.controls); |
| end: |
| mutex_unlock(&uvc_driver.ctrl_mutex); |
| return ret; |
| } |
| |
| int uvc_ctrl_add_mapping(struct uvc_control_mapping *mapping) |
| { |
| struct uvc_control_info *info; |
| struct uvc_control_mapping *map; |
| int ret = -EINVAL; |
| |
| if (mapping->id & ~V4L2_CTRL_ID_MASK) { |
| uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s' with " |
| "invalid control id 0x%08x\n", mapping->name, |
| mapping->id); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&uvc_driver.ctrl_mutex); |
| list_for_each_entry(info, &uvc_driver.controls, list) { |
| if (memcmp(info->entity, mapping->entity, 16) || |
| info->selector != mapping->selector) |
| continue; |
| |
| if (info->size * 8 < mapping->size + mapping->offset) { |
| uvc_trace(UVC_TRACE_CONTROL, "Mapping '%s' would " |
| "overflow control " UVC_GUID_FORMAT "/%u\n", |
| mapping->name, UVC_GUID_ARGS(info->entity), |
| info->selector); |
| ret = -EOVERFLOW; |
| goto end; |
| } |
| |
| /* Check if the list contains a mapping matching the new one. |
| * Bail out if it does. |
| */ |
| list_for_each_entry(map, &info->mappings, list) { |
| if (map->id == mapping->id) { |
| uvc_trace(UVC_TRACE_CONTROL, "Mapping '%s' is " |
| "already defined.\n", mapping->name); |
| ret = -EEXIST; |
| goto end; |
| } |
| } |
| |
| mapping->ctrl = info; |
| list_add_tail(&mapping->list, &info->mappings); |
| uvc_trace(UVC_TRACE_CONTROL, "Adding mapping %s to control " |
| UVC_GUID_FORMAT "/%u.\n", mapping->name, |
| UVC_GUID_ARGS(info->entity), info->selector); |
| |
| ret = 0; |
| break; |
| } |
| end: |
| mutex_unlock(&uvc_driver.ctrl_mutex); |
| return ret; |
| } |
| |
| /* |
| * Initialize device controls. |
| */ |
| int uvc_ctrl_init_device(struct uvc_device *dev) |
| { |
| struct uvc_control_info *info; |
| struct uvc_control *ctrl; |
| struct uvc_entity *entity; |
| unsigned int i; |
| |
| /* Walk the entities list and instantiate controls */ |
| list_for_each_entry(entity, &dev->entities, list) { |
| unsigned int bControlSize = 0, ncontrols = 0; |
| __u8 *bmControls = NULL; |
| |
| if (UVC_ENTITY_TYPE(entity) == VC_EXTENSION_UNIT) { |
| bmControls = entity->extension.bmControls; |
| bControlSize = entity->extension.bControlSize; |
| } else if (UVC_ENTITY_TYPE(entity) == VC_PROCESSING_UNIT) { |
| bmControls = entity->processing.bmControls; |
| bControlSize = entity->processing.bControlSize; |
| } else if (UVC_ENTITY_TYPE(entity) == ITT_CAMERA) { |
| bmControls = entity->camera.bmControls; |
| bControlSize = entity->camera.bControlSize; |
| } |
| |
| for (i = 0; i < bControlSize; ++i) |
| ncontrols += hweight8(bmControls[i]); |
| |
| if (ncontrols == 0) |
| continue; |
| |
| entity->controls = kzalloc(ncontrols*sizeof *ctrl, GFP_KERNEL); |
| if (entity->controls == NULL) |
| return -ENOMEM; |
| |
| entity->ncontrols = ncontrols; |
| |
| ctrl = entity->controls; |
| for (i = 0; i < bControlSize * 8; ++i) { |
| if (uvc_get_bit(bmControls, i) == 0) |
| continue; |
| |
| ctrl->entity = entity; |
| ctrl->index = i; |
| ctrl++; |
| } |
| } |
| |
| /* Walk the controls info list and associate them with the device |
| * controls, then add the device to the global device list. This has |
| * to be done while holding the controls lock, to make sure |
| * uvc_ctrl_add_info() will not get called in-between. |
| */ |
| mutex_lock(&uvc_driver.ctrl_mutex); |
| list_for_each_entry(info, &uvc_driver.controls, list) |
| uvc_ctrl_add_ctrl(dev, info); |
| |
| list_add_tail(&dev->list, &uvc_driver.devices); |
| mutex_unlock(&uvc_driver.ctrl_mutex); |
| |
| return 0; |
| } |
| |
| /* |
| * Cleanup device controls. |
| */ |
| void uvc_ctrl_cleanup_device(struct uvc_device *dev) |
| { |
| struct uvc_entity *entity; |
| unsigned int i; |
| |
| /* Remove the device from the global devices list */ |
| mutex_lock(&uvc_driver.ctrl_mutex); |
| if (dev->list.next != NULL) |
| list_del(&dev->list); |
| mutex_unlock(&uvc_driver.ctrl_mutex); |
| |
| list_for_each_entry(entity, &dev->entities, list) { |
| for (i = 0; i < entity->ncontrols; ++i) |
| kfree(entity->controls[i].data); |
| |
| kfree(entity->controls); |
| } |
| } |
| |
| void uvc_ctrl_init(void) |
| { |
| struct uvc_control_info *ctrl = uvc_ctrls; |
| struct uvc_control_info *cend = ctrl + ARRAY_SIZE(uvc_ctrls); |
| struct uvc_control_mapping *mapping = uvc_ctrl_mappings; |
| struct uvc_control_mapping *mend = |
| mapping + ARRAY_SIZE(uvc_ctrl_mappings); |
| |
| for (; ctrl < cend; ++ctrl) |
| uvc_ctrl_add_info(ctrl); |
| |
| for (; mapping < mend; ++mapping) |
| uvc_ctrl_add_mapping(mapping); |
| } |
| |