diff options
| author | Bhupesh Sharma <bhupesh.sharma@st.com> | 2013-03-28 09:41:53 (GMT) |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2013-04-02 08:42:49 (GMT) |
| commit | 2f1d57069338b14fcf4765ae2c25fc377da45b1f (patch) | |
| tree | 3b2cbfd148a6d5766ebd3b2b0decd6346b94e929 /drivers | |
| parent | d692522577c051058efbe9e3c8aef68a4c36e4f7 (diff) | |
| download | linux-2f1d57069338b14fcf4765ae2c25fc377da45b1f.tar.xz | |
usb: gadget/uvc: Add support for 'get_unmapped_area' for MMUless architectures
This patch adds the support for 'get_unmapped_area' in UVC gadget
which is called when the 'mmap' system call is executed on MMUless
architectures.
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@st.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/gadget/uvc_queue.c | 18 | ||||
| -rw-r--r-- | drivers/usb/gadget/uvc_v4l2.c | 15 |
2 files changed, 33 insertions, 0 deletions
diff --git a/drivers/usb/gadget/uvc_queue.c b/drivers/usb/gadget/uvc_queue.c index 3139795..7ce27e3 100644 --- a/drivers/usb/gadget/uvc_queue.c +++ b/drivers/usb/gadget/uvc_queue.c @@ -232,6 +232,24 @@ static int uvc_queue_mmap(struct uvc_video_queue *queue, return ret; } +#ifndef CONFIG_MMU +/* + * Get unmapped area. + * + * NO-MMU arch need this function to make mmap() work correctly. + */ +static unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue, + unsigned long pgoff) +{ + unsigned long ret; + + mutex_lock(&queue->mutex); + ret = vb2_get_unmapped_area(&queue->queue, 0, 0, pgoff, 0); + mutex_unlock(&queue->mutex); + return ret; +} +#endif + /* * Cancel the video buffers queue. * diff --git a/drivers/usb/gadget/uvc_v4l2.c b/drivers/usb/gadget/uvc_v4l2.c index c058867..ad48e81 100644 --- a/drivers/usb/gadget/uvc_v4l2.c +++ b/drivers/usb/gadget/uvc_v4l2.c @@ -339,6 +339,18 @@ uvc_v4l2_poll(struct file *file, poll_table *wait) return uvc_queue_poll(&uvc->video.queue, file, wait); } +#ifndef CONFIG_MMU +static unsigned long uvc_v4l2_get_unmapped_area(struct file *file, + unsigned long addr, unsigned long len, unsigned long pgoff, + unsigned long flags) +{ + struct video_device *vdev = video_devdata(file); + struct uvc_device *uvc = video_get_drvdata(vdev); + + return uvc_queue_get_unmapped_area(&uvc->video.queue, pgoff); +} +#endif + static struct v4l2_file_operations uvc_v4l2_fops = { .owner = THIS_MODULE, .open = uvc_v4l2_open, @@ -346,5 +358,8 @@ static struct v4l2_file_operations uvc_v4l2_fops = { .ioctl = uvc_v4l2_ioctl, .mmap = uvc_v4l2_mmap, .poll = uvc_v4l2_poll, +#ifndef CONFIG_MMU + .get_unmapped_area = uvc_v4l2_get_unmapped_area, +#endif }; |