diff options
author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-08-14 00:13:22 -0300 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-08-15 16:25:07 -0300 |
commit | 0c0d06cac63ee327ceaab4b5ffe2206574ab86bd (patch) | |
tree | e759f0dc3185d97f2a0c6b5cd5e32ea6faa74d40 /drivers/media/video/uvc/uvc_ctrl.c | |
parent | 84cfe9e79bd5ac11c963f4841158454fefa872f6 (diff) |
[media] rename most media/video usb drivers to media/usb
Rename all USB drivers with their own directory under
drivers/media/video into drivers/media/usb and update the
building system.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/uvc/uvc_ctrl.c')
-rw-r--r-- | drivers/media/video/uvc/uvc_ctrl.c | 2165 |
1 files changed, 0 insertions, 2165 deletions
diff --git a/drivers/media/video/uvc/uvc_ctrl.c b/drivers/media/video/uvc/uvc_ctrl.c deleted file mode 100644 index f7061a5ef1d2..000000000000 --- a/drivers/media/video/uvc/uvc_ctrl.c +++ /dev/null @@ -1,2165 +0,0 @@ -/* - * 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 <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 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, - .master_id = V4L2_CID_HUE_AUTO, - .master_manual = 0, - }, - { - .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, - .slave_ids = { V4L2_CID_HUE, }, - }, - { - .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), - .slave_ids = { V4L2_CID_EXPOSURE_ABSOLUTE, }, - }, - { - .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, - .master_id = V4L2_CID_EXPOSURE_AUTO, - .master_manual = V4L2_EXPOSURE_MANUAL, - }, - { - .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, - .slave_ids = { V4L2_CID_WHITE_BALANCE_TEMPERATURE, }, - }, - { - .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, - .master_id = V4L2_CID_AUTO_WHITE_BALANCE, - .master_manual = 0, - }, - { - .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, - .slave_ids = { V4L2_CID_BLUE_BALANCE, - V4L2_CID_RED_BALANCE }, - }, - { - .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, - .master_id = V4L2_CID_AUTO_WHITE_BALANCE, - .master_manual = 0, - }, - { - .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, - .master_id = V4L2_CID_AUTO_WHITE_BALANCE, - .master_manual = 0, - }, - { - .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, - .master_id = V4L2_CID_FOCUS_AUTO, - .master_manual = 0, - }, - { - .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, - .slave_ids = { V4L2_CID_FOCUS_ABSOLUTE, }, - }, - { - .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) { - 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 int __uvc_ctrl_get(struct uvc_video_chain *chain, - struct uvc_control *ctrl, struct uvc_control_mapping *mapping, - s32 *value) -{ - struct uvc_menu_info *menu; - unsigned int i; - int ret; - - if ((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; - } - - *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 == *value) { - *value = i; - break; - } - } - } - - 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; - struct uvc_menu_info *menu; - unsigned int i; - - 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 (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 = 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; - } - } - - 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; - - 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; - - ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping); - if (ctrl == NULL) { - ret = -EINVAL; - 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 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; -} - -/* -------------------------------------------------------------------------- - * 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->reserved, 0, sizeof(ev->reserved)); - 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; -} - -static void uvc_ctrl_send_event(struct uvc_fh *handle, - struct uvc_control *ctrl, struct uvc_control_mapping *mapping, - s32 value, u32 changes) -{ - struct v4l2_subscribed_event *sev; - struct v4l2_event ev; - - if (list_empty(&mapping->ev_subs)) - return; - - uvc_ctrl_fill_event(handle->chain, &ev, ctrl, mapping, value, changes); - - list_for_each_entry(sev, &mapping->ev_subs, node) { - if (sev->fh && (sev->fh != &handle->vfh || - (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK) || - (changes & V4L2_EVENT_CTRL_CH_FLAGS))) - v4l2_event_queue_fh(sev->fh, &ev); - } -} - -static void uvc_ctrl_send_slave_event(struct uvc_fh *handle, - struct uvc_control *master, u32 slave_id, - const struct v4l2_ext_control *xctrls, unsigned int xctrls_count) -{ - struct uvc_control_mapping *mapping = NULL; - struct uvc_control *ctrl = NULL; - u32 changes = V4L2_EVENT_CTRL_CH_FLAGS; - unsigned int i; - s32 val = 0; - - /* - * We can skip sending an event for the slave if the slave - * is being modified in the same transaction. - */ - for (i = 0; i < xctrls_count; i++) { - if (xctrls[i].id == slave_id) - return; - } - - __uvc_find_control(master->entity, slave_id, &mapping, &ctrl, 0); - if (ctrl == NULL) - return; - - if (__uvc_ctrl_get(handle->chain, ctrl, mapping, &val) == 0) - changes |= V4L2_EVENT_CTRL_CH_VALUE; - - uvc_ctrl_send_event(handle, ctrl, mapping, val, changes); -} - -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); - - for (j = 0; j < ARRAY_SIZE(mapping->slave_ids); ++j) { - if (!mapping->slave_ids[j]) - break; - uvc_ctrl_send_slave_event(handle, ctrl, - mapping->slave_ids[j], - xctrls, xctrls_count); - } - - /* - * If the master is being modified in the same transaction - * flags may change too. - */ - if (mapping->master_id) { - for (j = 0; j < xctrls_count; j++) { - if (xctrls[j].id == mapping->master_id) { - changes |= V4L2_EVENT_CTRL_CH_FLAGS; - break; - } - } - } - - uvc_ctrl_send_event(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; - - 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); - list_del(&sev->node); - 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 *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) - return ret; - } - - return 0; -} - -int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback, - const struct v4l2_ext_control *xctrls, - unsigned int xctrls_count) -{ - struct uvc_video_chain *chain = handle->chain; - 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; - } - - if (!rollback) - uvc_ctrl_send_events(handle, xctrls, xctrls_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; - - 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_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; - - INIT_LIST_HEAD(&map->ev_subs); - - 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; - - 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; - __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 */ - 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(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); - } -} |