| /* |
| * uvc_ctrl.c -- USB Video Class driver - Controls |
| * |
| * Copyright (C) 2005-2010 |
| * Laurent Pinchart (laurent.pinchart@ideasonboard.com) |
| * |
| * 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/list.h> |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/uaccess.h> |
| #include <linux/usb.h> |
| #include <linux/videodev2.h> |
| #include <linux/vmalloc.h> |
| #include <linux/wait.h> |
| #include <linux/atomic.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 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, |
| }, |
| { |
| .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_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_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, |
| }, |
| }; |
| |
| 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 __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 struct uvc_control_mapping uvc_ctrl_mappings[] = { |
| { |
| .id = V4L2_CID_BRIGHTNESS, |
| .name = "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, |
| .name = "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, |
| .name = "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, |
| }, |
| { |
| .id = V4L2_CID_SATURATION, |
| .name = "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, |
| .name = "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, |
| .name = "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, |
| .name = "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, |
| .name = "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_POWER_LINE_FREQUENCY, |
| .name = "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_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 = UVC_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 = UVC_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 = 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, |
| .name = "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, |
| }, |
| { |
| .id = V4L2_CID_AUTO_WHITE_BALANCE, |
| .name = "White Balance Temperature, Auto", |
| .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, |
| }, |
| { |
| .id = V4L2_CID_WHITE_BALANCE_TEMPERATURE, |
| .name = "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, |
| }, |
| { |
| .id = V4L2_CID_AUTO_WHITE_BALANCE, |
| .name = "White Balance Component, Auto", |
| .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, |
| }, |
| { |
| .id = V4L2_CID_BLUE_BALANCE, |
| .name = "White Balance Blue Component", |
| .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, |
| }, |
| { |
| .id = V4L2_CID_RED_BALANCE, |
| .name = "White Balance Red Component", |
| .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, |
| }, |
| { |
| .id = V4L2_CID_FOCUS_ABSOLUTE, |
| .name = "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, |
| }, |
| { |
| .id = V4L2_CID_FOCUS_AUTO, |
| .name = "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, |
| }, |
| { |
| .id = V4L2_CID_IRIS_ABSOLUTE, |
| .name = "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, |
| .name = "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, |
| .name = "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, |
| .name = "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, |
| .name = "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_UNSIGNED, |
| }, |
| { |
| .id = V4L2_CID_TILT_ABSOLUTE, |
| .name = "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_UNSIGNED, |
| }, |
| { |
| .id = V4L2_CID_PRIVACY, |
| .name = "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, |
| }, |
| }; |
| |
| /* ------------------------------------------------------------------------ |
| * 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; |
| |
| 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(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 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(const struct uvc_entity *entity, |
| const __u8 guid[16]) |
| { |
| switch (UVC_ENTITY_TYPE(entity)) { |
| case UVC_ITT_CAMERA: |
| return memcmp(uvc_camera_guid, guid, 16) == 0; |
| |
| case UVC_ITT_MEDIA_TRANSPORT_INPUT: |
| return memcmp(uvc_media_transport_input_guid, guid, 16) == 0; |
| |
| case UVC_VC_PROCESSING_UNIT: |
| return memcmp(uvc_processing_guid, guid, 16) == 0; |
| |
| case UVC_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->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_trace(UVC_TRACE_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) |
| return ret; |
| } |
| |
| ctrl->cached = 1; |
| 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; |
| struct uvc_menu_info *menu; |
| unsigned int i; |
| int ret; |
| |
| ret = mutex_lock_interruptible(&chain->ctrl_mutex); |
| if (ret < 0) |
| return -ERESTARTSYS; |
| |
| ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping); |
| if (ctrl == NULL) { |
| ret = -EINVAL; |
| goto done; |
| } |
| |
| memset(v4l2_ctrl, 0, sizeof *v4l2_ctrl); |
| v4l2_ctrl->id = mapping->id; |
| v4l2_ctrl->type = mapping->v4l2_type; |
| strlcpy(v4l2_ctrl->name, mapping->name, 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 (!ctrl->cached) { |
| ret = uvc_ctrl_populate_cache(chain, ctrl); |
| if (ret < 0) |
| goto done; |
| } |
| |
| 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 = 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; |
| } |
| } |
| |
| goto done; |
| |
| case V4L2_CTRL_TYPE_BOOLEAN: |
| v4l2_ctrl->minimum = 0; |
| v4l2_ctrl->maximum = 1; |
| v4l2_ctrl->step = 1; |
| goto done; |
| |
| case V4L2_CTRL_TYPE_BUTTON: |
| v4l2_ctrl->minimum = 0; |
| v4l2_ctrl->maximum = 0; |
| v4l2_ctrl->step = 0; |
| goto done; |
| |
| 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)); |
| |
| done: |
| mutex_unlock(&chain->ctrl_mutex); |
| return ret; |
| } |
| |
| /* |
| * Mapping V4L2 controls to UVC controls can be straighforward 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_menu_info *menu_info; |
| struct uvc_control_mapping *mapping; |
| struct uvc_control *ctrl; |
| u32 index = query_menu->index; |
| u32 id = query_menu->id; |
| int ret; |
| |
| memset(query_menu, 0, sizeof(*query_menu)); |
| query_menu->id = id; |
| query_menu->index = index; |
| |
| 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 (query_menu->index >= mapping->menu_count) { |
| ret = -EINVAL; |
| goto done; |
| } |
| |
| menu_info = &mapping->menu_info[query_menu->index]; |
| |
| if (mapping->data_type == UVC_CTRL_DATA_TYPE_BITMASK && |
| (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES)) { |
| s32 bitmap; |
| |
| if (!ctrl->cached) { |
| ret = uvc_ctrl_populate_cache(chain, ctrl); |
| if (ret < 0) |
| goto done; |
| } |
| |
| bitmap = mapping->get(mapping, UVC_GET_RES, |
| uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); |
| if (!(bitmap & menu_info->value)) { |
| ret = -EINVAL; |
| goto done; |
| } |
| } |
| |
| strlcpy(query_menu->name, menu_info->name, sizeof query_menu->name); |
| |
| done: |
| mutex_unlock(&chain->ctrl_mutex); |
| 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_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 *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. |
| */ |
| if (ctrl->info.flags & UVC_CTRL_FLAG_AUTO_UPDATE) |
| 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) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| int __uvc_ctrl_commit(struct uvc_video_chain *chain, int rollback) |
| { |
| 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); |
| if (ret < 0) |
| goto done; |
| } |
| |
| 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; |
| struct uvc_menu_info *menu; |
| unsigned int i; |
| int ret; |
| |
| ctrl = uvc_find_control(chain, xctrl->id, &mapping); |
| if (ctrl == NULL || (ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) |
| return -EINVAL; |
| |
| if (!ctrl->loaded) { |
| ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, ctrl->entity->id, |
| chain->dev->intfnum, ctrl->info.selector, |
| uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
| ctrl->info.size); |
| if (ret < 0) |
| return ret; |
| |
| ctrl->loaded = 1; |
| } |
| |
| xctrl->value = mapping->get(mapping, UVC_GET_CUR, |
| uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); |
| |
| 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_chain *chain, |
| struct v4l2_ext_control *xctrl) |
| { |
| struct uvc_control *ctrl; |
| struct uvc_control_mapping *mapping; |
| s32 value; |
| u32 step; |
| s32 min; |
| s32 max; |
| int ret; |
| |
| ctrl = uvc_find_control(chain, xctrl->id, &mapping); |
| if (ctrl == NULL || (ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR) == 0) |
| return -EINVAL; |
| |
| /* 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 + (xctrl->value - min + step/2) / step * step; |
| xctrl->value = clamp(xctrl->value, min, max); |
| 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 < 0 || xctrl->value >= mapping->menu_count) |
| return -ERANGE; |
| value = mapping->menu_info[xctrl->value].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 && |
| (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES)) { |
| if (!ctrl->cached) { |
| ret = uvc_ctrl_populate_cache(chain, ctrl); |
| if (ret < 0) |
| return ret; |
| } |
| |
| step = mapping->get(mapping, UVC_GET_RES, |
| uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES)); |
| if (!(step & value)) |
| return -ERANGE; |
| } |
| |
| 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->loaded && (ctrl->info.size * 8) != mapping->size) { |
| if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) { |
| memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
| 0, ctrl->info.size); |
| } else { |
| ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, |
| ctrl->entity->id, chain->dev->intfnum, |
| ctrl->info.selector, |
| uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), |
| ctrl->info.size); |
| if (ret < 0) |
| return ret; |
| } |
| |
| ctrl->loaded = 1; |
| } |
| |
| /* 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)); |
| |
| ctrl->dirty = 1; |
| ctrl->modified = 1; |
| return 0; |
| } |
| |
| /* -------------------------------------------------------------------------- |
| * Dynamic controls |
| */ |
| |
| 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->extension.guidExtensionCode, |
| 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_trace(UVC_TRACE_CONTROL, |
| "GET_LEN failed on control %pUl/%u (%d).\n", |
| info->entity, info->selector, ret); |
| goto done; |
| } |
| |
| info->size = le16_to_cpup((__le16 *)data); |
| |
| /* Query the control information (GET_INFO) */ |
| ret = uvc_query_ctrl(dev, UVC_GET_INFO, ctrl->entity->id, dev->intfnum, |
| info->selector, data, 1); |
| if (ret < 0) { |
| uvc_trace(UVC_TRACE_CONTROL, |
| "GET_INFO failed on control %pUl/%u (%d).\n", |
| info->entity, info->selector, ret); |
| goto done; |
| } |
| |
| info->flags = UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX |
| | UVC_CTRL_FLAG_GET_RES | UVC_CTRL_FLAG_GET_DEF |
| | (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); |
| |
| uvc_ctrl_fixup_xu_info(dev, ctrl, info); |
| |
| uvc_trace(UVC_TRACE_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_trace(UVC_TRACE_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; |
| struct uvc_control *ctrl; |
| unsigned int i, found = 0; |
| __u32 reqflags; |
| __u16 size; |
| __u8 *data = NULL; |
| int ret; |
| |
| /* Find the extension unit. */ |
| list_for_each_entry(entity, &chain->entities, chain) { |
| if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT && |
| entity->id == xqry->unit) |
| break; |
| } |
| |
| if (entity->id != xqry->unit) { |
| uvc_trace(UVC_TRACE_CONTROL, "Extension unit %u not found.\n", |
| xqry->unit); |
| return -ENOENT; |
| } |
| |
| /* Find the control and perform delayed initialization if needed. */ |
| for (i = 0; i < entity->ncontrols; ++i) { |
| ctrl = &entity->controls[i]; |
| if (ctrl->index == xqry->selector - 1) { |
| found = 1; |
| break; |
| } |
| } |
| |
| if (!found) { |
| uvc_trace(UVC_TRACE_CONTROL, "Control %pUl/%u not found.\n", |
| entity->extension.guidExtensionCode, 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_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->initialized || !ctrl->modified || |
| (ctrl->info.flags & UVC_CTRL_FLAG_RESTORE) == 0) |
| continue; |
| |
| printk(KERN_INFO "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); |
| 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) |
| { |
| int ret = 0; |
| |
| memcpy(&ctrl->info, info, sizeof(*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 == NULL) { |
| ret = -ENOMEM; |
| goto done; |
| } |
| |
| ctrl->initialized = 1; |
| |
| uvc_trace(UVC_TRACE_CONTROL, "Added control %pUl/%u to device %s " |
| "entity %u\n", ctrl->info.entity, ctrl->info.selector, |
| dev->udev->devpath, ctrl->entity->id); |
| |
| done: |
| if (ret < 0) |
| kfree(ctrl->uvc_data); |
| return ret; |
| } |
| |
| /* |
| * Add a control mapping to a given control. |
| */ |
| static int __uvc_ctrl_add_mapping(struct uvc_device *dev, |
| struct uvc_control *ctrl, const struct uvc_control_mapping *mapping) |
| { |
| struct uvc_control_mapping *map; |
| unsigned int size; |
| |
| /* 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 == NULL) |
| return -ENOMEM; |
| |
| size = sizeof(*mapping->menu_info) * mapping->menu_count; |
| map->menu_info = kmemdup(mapping->menu_info, size, GFP_KERNEL); |
| if (map->menu_info == NULL) { |
| kfree(map); |
| return -ENOMEM; |
| } |
| |
| if (map->get == NULL) |
| map->get = uvc_get_le_value; |
| if (map->set == NULL) |
| map->set = uvc_set_le_value; |
| |
| map->ctrl = &ctrl->info; |
| list_add_tail(&map->list, &ctrl->info.mappings); |
| uvc_trace(UVC_TRACE_CONTROL, |
| "Adding mapping '%s' to control %pUl/%u.\n", |
| map->name, ctrl->info.entity, ctrl->info.selector); |
| |
| return 0; |
| } |
| |
| 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_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s', control " |
| "id 0x%08x is invalid.\n", mapping->name, |
| 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; |
| } |
| |
| list_for_each_entry(map, &ctrl->info.mappings, list) { |
| if (mapping->id == map->id) { |
| uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s', " |
| "control id 0x%08x already exists.\n", |
| mapping->name, 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_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s', maximum " |
| "mappings count (%u) exceeded.\n", mapping->name, |
| UVC_MAX_CONTROL_MAPPINGS); |
| ret = -ENOMEM; |
| goto done; |
| } |
| |
| ret = __uvc_ctrl_add_mapping(dev, 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_trace(UVC_TRACE_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_device *dev, struct uvc_control *ctrl) |
| { |
| const struct uvc_control_info *info = uvc_ctrls; |
| const struct uvc_control_info *iend = info + ARRAY_SIZE(uvc_ctrls); |
| const struct uvc_control_mapping *mapping = uvc_ctrl_mappings; |
| const struct uvc_control_mapping *mend = |
| mapping + ARRAY_SIZE(uvc_ctrl_mappings); |
| |
| /* 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 (; info < iend; ++info) { |
| if (uvc_entity_match_guid(ctrl->entity, info->entity) && |
| ctrl->index == info->index) { |
| uvc_ctrl_add_info(dev, ctrl, info); |
| break; |
| } |
| } |
| |
| if (!ctrl->initialized) |
| return; |
| |
| for (; mapping < mend; ++mapping) { |
| if (uvc_entity_match_guid(ctrl->entity, mapping->entity) && |
| ctrl->info.selector == mapping->selector) |
| __uvc_ctrl_add_mapping(dev, ctrl, mapping); |
| } |
| } |
| |
| /* |
| * Initialize device controls. |
| */ |
| int uvc_ctrl_init_device(struct uvc_device *dev) |
| { |
| struct uvc_entity *entity; |
| unsigned int i; |
| |
| /* Walk the entities list and instantiate controls */ |
| list_for_each_entry(entity, &dev->entities, list) { |
| struct uvc_control *ctrl; |
| unsigned int bControlSize = 0, ncontrols = 0; |
| __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; |
| } |
| |
| /* Remove bogus/blacklisted controls */ |
| uvc_ctrl_prune_entity(dev, entity); |
| |
| /* Count supported controls and allocate the controls array */ |
| 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; |
| |
| /* 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(dev, ctrl); |
| ctrl++; |
| } |
| } |
| |
| 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_info); |
| kfree(mapping); |
| } |
| } |
| |
| void uvc_ctrl_cleanup_device(struct uvc_device *dev) |
| { |
| struct uvc_entity *entity; |
| unsigned int i; |
| |
| /* 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); |
| } |
| } |