diff options
Diffstat (limited to 'drivers/media/video/uvc/uvc_v4l2.c')
-rw-r--r-- | drivers/media/video/uvc/uvc_v4l2.c | 135 |
1 files changed, 79 insertions, 56 deletions
diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c index 7c9ab2933496..6d15de9b5204 100644 --- a/drivers/media/video/uvc/uvc_v4l2.c +++ b/drivers/media/video/uvc/uvc_v4l2.c @@ -1,8 +1,8 @@ /* * uvc_v4l2.c -- USB Video Class driver - V4L2 API * - * Copyright (C) 2005-2009 - * Laurent Pinchart (laurent.pinchart@skynet.be) + * 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 @@ -29,6 +29,74 @@ #include "uvcvideo.h" /* ------------------------------------------------------------------------ + * UVC ioctls + */ +static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain, + struct uvc_xu_control_mapping *xmap, int old) +{ + struct uvc_control_mapping *map; + unsigned int size; + int ret; + + map = kzalloc(sizeof *map, GFP_KERNEL); + if (map == NULL) + return -ENOMEM; + + map->id = xmap->id; + memcpy(map->name, xmap->name, sizeof map->name); + memcpy(map->entity, xmap->entity, sizeof map->entity); + map->selector = xmap->selector; + map->size = xmap->size; + map->offset = xmap->offset; + map->v4l2_type = xmap->v4l2_type; + map->data_type = xmap->data_type; + + switch (xmap->v4l2_type) { + case V4L2_CTRL_TYPE_INTEGER: + case V4L2_CTRL_TYPE_BOOLEAN: + case V4L2_CTRL_TYPE_BUTTON: + break; + + case V4L2_CTRL_TYPE_MENU: + if (old) { + uvc_trace(UVC_TRACE_CONTROL, "V4L2_CTRL_TYPE_MENU not " + "supported for UVCIOC_CTRL_MAP_OLD.\n"); + ret = -EINVAL; + goto done; + } + + size = xmap->menu_count * sizeof(*map->menu_info); + map->menu_info = kmalloc(size, GFP_KERNEL); + if (map->menu_info == NULL) { + ret = -ENOMEM; + goto done; + } + + if (copy_from_user(map->menu_info, xmap->menu_info, size)) { + ret = -EFAULT; + goto done; + } + + map->menu_count = xmap->menu_count; + break; + + default: + uvc_trace(UVC_TRACE_CONTROL, "Unsupported V4L2 control type " + "%u.\n", xmap->v4l2_type); + ret = -EINVAL; + goto done; + } + + ret = uvc_ctrl_add_mapping(chain, map); + +done: + kfree(map->menu_info); + kfree(map); + + return ret; +} + +/* ------------------------------------------------------------------------ * V4L2 interface */ @@ -451,7 +519,7 @@ static int uvc_v4l2_open(struct file *file) static int uvc_v4l2_release(struct file *file) { - struct uvc_fh *handle = (struct uvc_fh *)file->private_data; + struct uvc_fh *handle = file->private_data; struct uvc_streaming *stream = handle->stream; uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_release\n"); @@ -482,7 +550,7 @@ static int uvc_v4l2_release(struct file *file) static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) { struct video_device *vdev = video_devdata(file); - struct uvc_fh *handle = (struct uvc_fh *)file->private_data; + struct uvc_fh *handle = file->private_data; struct uvc_video_chain *chain = handle->chain; struct uvc_streaming *stream = handle->stream; long ret = 0; @@ -956,58 +1024,13 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) /* Dynamic controls. */ case UVCIOC_CTRL_ADD: - { - struct uvc_xu_control_info *xinfo = arg; - struct uvc_control_info *info; - - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - - info = kzalloc(sizeof *info, GFP_KERNEL); - if (info == NULL) - return -ENOMEM; - - memcpy(info->entity, xinfo->entity, sizeof info->entity); - info->index = xinfo->index; - info->selector = xinfo->selector; - info->size = xinfo->size; - info->flags = xinfo->flags; - - info->flags |= UVC_CONTROL_GET_MIN | UVC_CONTROL_GET_MAX | - UVC_CONTROL_GET_RES | UVC_CONTROL_GET_DEF; - - ret = uvc_ctrl_add_info(info); - if (ret < 0) - kfree(info); - break; - } + /* Legacy ioctl, kept for API compatibility reasons */ + return -EEXIST; + case UVCIOC_CTRL_MAP_OLD: case UVCIOC_CTRL_MAP: - { - struct uvc_xu_control_mapping *xmap = arg; - struct uvc_control_mapping *map; - - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - - map = kzalloc(sizeof *map, GFP_KERNEL); - if (map == NULL) - return -ENOMEM; - - map->id = xmap->id; - memcpy(map->name, xmap->name, sizeof map->name); - memcpy(map->entity, xmap->entity, sizeof map->entity); - map->selector = xmap->selector; - map->size = xmap->size; - map->offset = xmap->offset; - map->v4l2_type = xmap->v4l2_type; - map->data_type = xmap->data_type; - - ret = uvc_ctrl_add_mapping(map); - if (ret < 0) - kfree(map); - break; - } + return uvc_ioctl_ctrl_map(chain, arg, + cmd == UVCIOC_CTRL_MAP_OLD); case UVCIOC_CTRL_GET: return uvc_xu_ctrl_query(chain, arg, 0); @@ -1067,7 +1090,7 @@ static const struct vm_operations_struct uvc_vm_ops = { static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma) { - struct uvc_fh *handle = (struct uvc_fh *)file->private_data; + struct uvc_fh *handle = file->private_data; struct uvc_streaming *stream = handle->stream; struct uvc_video_queue *queue = &stream->queue; struct uvc_buffer *uninitialized_var(buffer); @@ -1122,7 +1145,7 @@ done: static unsigned int uvc_v4l2_poll(struct file *file, poll_table *wait) { - struct uvc_fh *handle = (struct uvc_fh *)file->private_data; + struct uvc_fh *handle = file->private_data; struct uvc_streaming *stream = handle->stream; uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_poll\n"); |