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-rw-r--r--drivers/media/video/uvc/uvc_ctrl.c2
-rw-r--r--drivers/media/video/uvc/uvc_driver.c45
-rw-r--r--drivers/media/video/uvc/uvc_status.c16
-rw-r--r--drivers/media/video/uvc/uvc_v4l2.c20
-rw-r--r--drivers/media/video/uvc/uvc_video.c133
-rw-r--r--drivers/media/video/uvc/uvcvideo.h8
6 files changed, 146 insertions, 78 deletions
diff --git a/drivers/media/video/uvc/uvc_ctrl.c b/drivers/media/video/uvc/uvc_ctrl.c
index d2576f6391c0..0d7e38d6ff6a 100644
--- a/drivers/media/video/uvc/uvc_ctrl.c
+++ b/drivers/media/video/uvc/uvc_ctrl.c
@@ -786,7 +786,7 @@ int uvc_query_v4l2_ctrl(struct uvc_video_device *video,
memset(v4l2_ctrl, 0, sizeof *v4l2_ctrl);
v4l2_ctrl->id = mapping->id;
v4l2_ctrl->type = mapping->v4l2_type;
- strncpy(v4l2_ctrl->name, mapping->name, sizeof v4l2_ctrl->name);
+ strlcpy(v4l2_ctrl->name, mapping->name, sizeof v4l2_ctrl->name);
v4l2_ctrl->flags = 0;
if (!(ctrl->info->flags & UVC_CONTROL_SET_CUR))
diff --git a/drivers/media/video/uvc/uvc_driver.c b/drivers/media/video/uvc/uvc_driver.c
index b12873265cc5..399412d7f020 100644
--- a/drivers/media/video/uvc/uvc_driver.c
+++ b/drivers/media/video/uvc/uvc_driver.c
@@ -314,7 +314,7 @@ static int uvc_parse_format(struct uvc_device *dev,
fmtdesc = uvc_format_by_guid(&buffer[5]);
if (fmtdesc != NULL) {
- strncpy(format->name, fmtdesc->name,
+ strlcpy(format->name, fmtdesc->name,
sizeof format->name);
format->fcc = fmtdesc->fcc;
} else {
@@ -345,7 +345,7 @@ static int uvc_parse_format(struct uvc_device *dev,
return -EINVAL;
}
- strncpy(format->name, "MJPEG", sizeof format->name);
+ strlcpy(format->name, "MJPEG", sizeof format->name);
format->fcc = V4L2_PIX_FMT_MJPEG;
format->flags = UVC_FMT_FLAG_COMPRESSED;
format->bpp = 0;
@@ -363,13 +363,13 @@ static int uvc_parse_format(struct uvc_device *dev,
switch (buffer[8] & 0x7f) {
case 0:
- strncpy(format->name, "SD-DV", sizeof format->name);
+ strlcpy(format->name, "SD-DV", sizeof format->name);
break;
case 1:
- strncpy(format->name, "SDL-DV", sizeof format->name);
+ strlcpy(format->name, "SDL-DV", sizeof format->name);
break;
case 2:
- strncpy(format->name, "HD-DV", sizeof format->name);
+ strlcpy(format->name, "HD-DV", sizeof format->name);
break;
default:
uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming"
@@ -379,7 +379,7 @@ static int uvc_parse_format(struct uvc_device *dev,
return -EINVAL;
}
- strncat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz",
+ strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz",
sizeof format->name);
format->fcc = V4L2_PIX_FMT_DV;
@@ -1526,7 +1526,7 @@ static int uvc_register_video(struct uvc_device *dev)
vdev->minor = -1;
vdev->fops = &uvc_fops;
vdev->release = video_device_release;
- strncpy(vdev->name, dev->name, sizeof vdev->name);
+ strlcpy(vdev->name, dev->name, sizeof vdev->name);
/* Set the driver data before calling video_register_device, otherwise
* uvc_v4l2_open might race us.
@@ -1621,7 +1621,7 @@ static int uvc_probe(struct usb_interface *intf,
dev->quirks = id->driver_info | uvc_quirks_param;
if (udev->product != NULL)
- strncpy(dev->name, udev->product, sizeof dev->name);
+ strlcpy(dev->name, udev->product, sizeof dev->name);
else
snprintf(dev->name, sizeof dev->name,
"UVC Camera (%04x:%04x)",
@@ -1833,6 +1833,15 @@ static struct usb_device_id uvc_ids[] = {
.bInterfaceClass = USB_CLASS_VENDOR_SPEC,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0 },
+ /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */
+ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
+ | USB_DEVICE_ID_MATCH_INT_INFO,
+ .idVendor = 0x058f,
+ .idProduct = 0x3820,
+ .bInterfaceClass = USB_CLASS_VIDEO,
+ .bInterfaceSubClass = 1,
+ .bInterfaceProtocol = 0,
+ .driver_info = UVC_QUIRK_PROBE_MINMAX },
/* Apple Built-In iSight */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
@@ -1852,6 +1861,15 @@ static struct usb_device_id uvc_ids[] = {
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = UVC_QUIRK_STREAM_NO_FID },
+ /* ViMicro */
+ { .match_flags = USB_DEVICE_ID_MATCH_VENDOR
+ | USB_DEVICE_ID_MATCH_INT_INFO,
+ .idVendor = 0x0ac8,
+ .idProduct = 0x0000,
+ .bInterfaceClass = USB_CLASS_VIDEO,
+ .bInterfaceSubClass = 1,
+ .bInterfaceProtocol = 0,
+ .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
/* MT6227 */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
@@ -1879,7 +1897,7 @@ static struct usb_device_id uvc_ids[] = {
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = UVC_QUIRK_STREAM_NO_FID },
- /* Asus F9SG */
+ /* Syntek (Asus F9SG) */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x174f,
@@ -1897,6 +1915,15 @@ static struct usb_device_id uvc_ids[] = {
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = UVC_QUIRK_STREAM_NO_FID },
+ /* Syntek (JAOtech Smart Terminal) */
+ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
+ | USB_DEVICE_ID_MATCH_INT_INFO,
+ .idVendor = 0x174f,
+ .idProduct = 0x8a34,
+ .bInterfaceClass = USB_CLASS_VIDEO,
+ .bInterfaceSubClass = 1,
+ .bInterfaceProtocol = 0,
+ .driver_info = UVC_QUIRK_STREAM_NO_FID },
/* Lenovo Thinkpad SL500 */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
diff --git a/drivers/media/video/uvc/uvc_status.c b/drivers/media/video/uvc/uvc_status.c
index c705f248da88..21d87124986b 100644
--- a/drivers/media/video/uvc/uvc_status.c
+++ b/drivers/media/video/uvc/uvc_status.c
@@ -24,26 +24,19 @@
#ifdef CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV
static int uvc_input_init(struct uvc_device *dev)
{
- struct usb_device *udev = dev->udev;
struct input_dev *input;
- char *phys = NULL;
int ret;
input = input_allocate_device();
if (input == NULL)
return -ENOMEM;
- phys = kmalloc(6 + strlen(udev->bus->bus_name) + strlen(udev->devpath),
- GFP_KERNEL);
- if (phys == NULL) {
- ret = -ENOMEM;
- goto error;
- }
- sprintf(phys, "usb-%s-%s", udev->bus->bus_name, udev->devpath);
+ usb_make_path(dev->udev, dev->input_phys, sizeof(dev->input_phys));
+ strlcat(dev->input_phys, "/button", sizeof(dev->input_phys));
input->name = dev->name;
- input->phys = phys;
- usb_to_input_id(udev, &input->id);
+ input->phys = dev->input_phys;
+ usb_to_input_id(dev->udev, &input->id);
input->dev.parent = &dev->intf->dev;
__set_bit(EV_KEY, input->evbit);
@@ -57,7 +50,6 @@ static int uvc_input_init(struct uvc_device *dev)
error:
input_free_device(input);
- kfree(phys);
return ret;
}
diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c
index d681519d0c8a..2a80caa54fb4 100644
--- a/drivers/media/video/uvc/uvc_v4l2.c
+++ b/drivers/media/video/uvc/uvc_v4l2.c
@@ -55,7 +55,7 @@ static int uvc_v4l2_query_menu(struct uvc_video_device *video,
return -EINVAL;
menu_info = &mapping->menu_info[query_menu->index];
- strncpy(query_menu->name, menu_info->name, 32);
+ strlcpy(query_menu->name, menu_info->name, sizeof query_menu->name);
return 0;
}
@@ -486,10 +486,10 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
struct v4l2_capability *cap = arg;
memset(cap, 0, sizeof *cap);
- strncpy(cap->driver, "uvcvideo", sizeof cap->driver);
- strncpy(cap->card, vdev->name, 32);
- strncpy(cap->bus_info, video->dev->udev->bus->bus_name,
- sizeof cap->bus_info);
+ strlcpy(cap->driver, "uvcvideo", sizeof cap->driver);
+ strlcpy(cap->card, vdev->name, sizeof cap->card);
+ usb_make_path(video->dev->udev,
+ cap->bus_info, sizeof(cap->bus_info));
cap->version = DRIVER_VERSION_NUMBER;
if (video->streaming->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
@@ -620,7 +620,7 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
memset(input, 0, sizeof *input);
input->index = index;
- strncpy(input->name, iterm->name, sizeof input->name);
+ strlcpy(input->name, iterm->name, sizeof input->name);
if (UVC_ENTITY_TYPE(iterm) == ITT_CAMERA)
input->type = V4L2_INPUT_TYPE_CAMERA;
break;
@@ -673,16 +673,22 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
{
struct v4l2_fmtdesc *fmt = arg;
struct uvc_format *format;
+ enum v4l2_buf_type type = fmt->type;
+ __u32 index = fmt->index;
if (fmt->type != video->streaming->type ||
fmt->index >= video->streaming->nformats)
return -EINVAL;
+ memset(fmt, 0, sizeof(*fmt));
+ fmt->index = index;
+ fmt->type = type;
+
format = &video->streaming->format[fmt->index];
fmt->flags = 0;
if (format->flags & UVC_FMT_FLAG_COMPRESSED)
fmt->flags |= V4L2_FMT_FLAG_COMPRESSED;
- strncpy(fmt->description, format->name,
+ strlcpy(fmt->description, format->name,
sizeof fmt->description);
fmt->description[sizeof fmt->description - 1] = 0;
fmt->pixelformat = format->fcc;
diff --git a/drivers/media/video/uvc/uvc_video.c b/drivers/media/video/uvc/uvc_video.c
index 9bc4705be78d..a95e17329c5b 100644
--- a/drivers/media/video/uvc/uvc_video.c
+++ b/drivers/media/video/uvc/uvc_video.c
@@ -61,7 +61,7 @@ int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit,
return 0;
}
-static void uvc_fixup_buffer_size(struct uvc_video_device *video,
+static void uvc_fixup_video_ctrl(struct uvc_video_device *video,
struct uvc_streaming_control *ctrl)
{
struct uvc_format *format;
@@ -84,6 +84,31 @@ static void uvc_fixup_buffer_size(struct uvc_video_device *video,
video->dev->uvc_version < 0x0110))
ctrl->dwMaxVideoFrameSize =
frame->dwMaxVideoFrameBufferSize;
+
+ if (video->dev->quirks & UVC_QUIRK_FIX_BANDWIDTH &&
+ video->streaming->intf->num_altsetting > 1) {
+ u32 interval;
+ u32 bandwidth;
+
+ interval = (ctrl->dwFrameInterval > 100000)
+ ? ctrl->dwFrameInterval
+ : frame->dwFrameInterval[0];
+
+ /* Compute a bandwidth estimation by multiplying the frame
+ * size by the number of video frames per second, divide the
+ * result by the number of USB frames (or micro-frames for
+ * high-speed devices) per second and add the UVC header size
+ * (assumed to be 12 bytes long).
+ */
+ bandwidth = frame->wWidth * frame->wHeight / 8 * format->bpp;
+ bandwidth *= 10000000 / interval + 1;
+ bandwidth /= 1000;
+ if (video->dev->udev->speed == USB_SPEED_HIGH)
+ bandwidth /= 8;
+ bandwidth += 12;
+
+ ctrl->dwMaxPayloadTransferSize = bandwidth;
+ }
}
static int uvc_get_video_ctrl(struct uvc_video_device *video,
@@ -158,10 +183,11 @@ static int uvc_get_video_ctrl(struct uvc_video_device *video,
ctrl->bMaxVersion = 0;
}
- /* Some broken devices return a null or wrong dwMaxVideoFrameSize.
- * Try to get the value from the format and frame descriptors.
+ /* Some broken devices return null or wrong dwMaxVideoFrameSize and
+ * dwMaxPayloadTransferSize fields. Try to get the value from the
+ * format and frame descriptors.
*/
- uvc_fixup_buffer_size(video, ctrl);
+ uvc_fixup_video_ctrl(video, ctrl);
ret = 0;
out:
@@ -540,6 +566,9 @@ static void uvc_video_decode_bulk(struct urb *urb,
u8 *mem;
int len, ret;
+ if (urb->actual_length == 0)
+ return;
+
mem = urb->transfer_buffer;
len = urb->actual_length;
video->bulk.payload_size += len;
@@ -699,27 +728,47 @@ static void uvc_free_urb_buffers(struct uvc_video_device *video)
* already allocated when resuming from suspend, in which case it will
* return without touching the buffers.
*
- * Return 0 on success or -ENOMEM when out of memory.
+ * Limit the buffer size to UVC_MAX_PACKETS bulk/isochronous packets. If the
+ * system is too low on memory try successively smaller numbers of packets
+ * until allocation succeeds.
+ *
+ * Return the number of allocated packets on success or 0 when out of memory.
*/
static int uvc_alloc_urb_buffers(struct uvc_video_device *video,
- unsigned int size)
+ unsigned int size, unsigned int psize, gfp_t gfp_flags)
{
+ unsigned int npackets;
unsigned int i;
/* Buffers are already allocated, bail out. */
if (video->urb_size)
return 0;
- for (i = 0; i < UVC_URBS; ++i) {
- video->urb_buffer[i] = usb_buffer_alloc(video->dev->udev,
- size, GFP_KERNEL, &video->urb_dma[i]);
- if (video->urb_buffer[i] == NULL) {
- uvc_free_urb_buffers(video);
- return -ENOMEM;
+ /* Compute the number of packets. Bulk endpoints might transfer UVC
+ * payloads accross multiple URBs.
+ */
+ npackets = DIV_ROUND_UP(size, psize);
+ if (npackets > UVC_MAX_PACKETS)
+ npackets = UVC_MAX_PACKETS;
+
+ /* Retry allocations until one succeed. */
+ for (; npackets > 1; npackets /= 2) {
+ for (i = 0; i < UVC_URBS; ++i) {
+ video->urb_buffer[i] = usb_buffer_alloc(
+ video->dev->udev, psize * npackets,
+ gfp_flags | __GFP_NOWARN, &video->urb_dma[i]);
+ if (!video->urb_buffer[i]) {
+ uvc_free_urb_buffers(video);
+ break;
+ }
+ }
+
+ if (i == UVC_URBS) {
+ video->urb_size = psize * npackets;
+ return npackets;
}
}
- video->urb_size = size;
return 0;
}
@@ -753,29 +802,19 @@ static int uvc_init_video_isoc(struct uvc_video_device *video,
{
struct urb *urb;
unsigned int npackets, i, j;
- __u16 psize;
- __u32 size;
+ u16 psize;
+ u32 size;
- /* Compute the number of isochronous packets to allocate by dividing
- * the maximum video frame size by the packet size. Limit the result
- * to UVC_MAX_ISO_PACKETS.
- */
psize = le16_to_cpu(ep->desc.wMaxPacketSize);
psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
-
size = video->streaming->ctrl.dwMaxVideoFrameSize;
- if (size > UVC_MAX_FRAME_SIZE)
- return -EINVAL;
- npackets = DIV_ROUND_UP(size, psize);
- if (npackets > UVC_MAX_ISO_PACKETS)
- npackets = UVC_MAX_ISO_PACKETS;
+ npackets = uvc_alloc_urb_buffers(video, size, psize, gfp_flags);
+ if (npackets == 0)
+ return -ENOMEM;
size = npackets * psize;
- if (uvc_alloc_urb_buffers(video, size) < 0)
- return -ENOMEM;
-
for (i = 0; i < UVC_URBS; ++i) {
urb = usb_alloc_urb(npackets, gfp_flags);
if (urb == NULL) {
@@ -814,25 +853,20 @@ static int uvc_init_video_bulk(struct uvc_video_device *video,
struct usb_host_endpoint *ep, gfp_t gfp_flags)
{
struct urb *urb;
- unsigned int pipe, i;
- __u16 psize;
- __u32 size;
-
- /* Compute the bulk URB size. Some devices set the maximum payload
- * size to a value too high for memory-constrained devices. We must
- * then transfer the payload accross multiple URBs. To be consistant
- * with isochronous mode, allocate maximum UVC_MAX_ISO_PACKETS per bulk
- * URB.
- */
+ unsigned int npackets, pipe, i;
+ u16 psize;
+ u32 size;
+
psize = le16_to_cpu(ep->desc.wMaxPacketSize) & 0x07ff;
size = video->streaming->ctrl.dwMaxPayloadTransferSize;
video->bulk.max_payload_size = size;
- if (size > psize * UVC_MAX_ISO_PACKETS)
- size = psize * UVC_MAX_ISO_PACKETS;
- if (uvc_alloc_urb_buffers(video, size) < 0)
+ npackets = uvc_alloc_urb_buffers(video, size, psize, gfp_flags);
+ if (npackets == 0)
return -ENOMEM;
+ size = npackets * psize;
+
if (usb_endpoint_dir_in(&ep->desc))
pipe = usb_rcvbulkpipe(video->dev->udev,
ep->desc.bEndpointAddress);
@@ -1021,11 +1055,20 @@ int uvc_video_init(struct uvc_video_device *video)
*/
usb_set_interface(video->dev->udev, video->streaming->intfnum, 0);
- /* Some webcams don't suport GET_DEF requests on the probe control. We
- * fall back to GET_CUR if GET_DEF fails.
+ /* Set the streaming probe control with default streaming parameters
+ * retrieved from the device. Webcams that don't suport GET_DEF
+ * requests on the probe control will just keep their current streaming
+ * parameters.
+ */
+ if (uvc_get_video_ctrl(video, probe, 1, GET_DEF) == 0)
+ uvc_set_video_ctrl(video, probe, 1);
+
+ /* Initialize the streaming parameters with the probe control current
+ * value. This makes sure SET_CUR requests on the streaming commit
+ * control will always use values retrieved from a successful GET_CUR
+ * request on the probe control, as required by the UVC specification.
*/
- if ((ret = uvc_get_video_ctrl(video, probe, 1, GET_DEF)) < 0 &&
- (ret = uvc_get_video_ctrl(video, probe, 1, GET_CUR)) < 0)
+ if ((ret = uvc_get_video_ctrl(video, probe, 1, GET_CUR)) < 0)
return ret;
/* Check if the default format descriptor exists. Use the first
diff --git a/drivers/media/video/uvc/uvcvideo.h b/drivers/media/video/uvc/uvcvideo.h
index 027947ea9b6e..e5014e668f99 100644
--- a/drivers/media/video/uvc/uvcvideo.h
+++ b/drivers/media/video/uvc/uvcvideo.h
@@ -296,10 +296,8 @@ struct uvc_xu_control {
/* Number of isochronous URBs. */
#define UVC_URBS 5
-/* Maximum number of packets per isochronous URB. */
-#define UVC_MAX_ISO_PACKETS 40
-/* Maximum frame size in bytes, for sanity checking. */
-#define UVC_MAX_FRAME_SIZE (16*1024*1024)
+/* Maximum number of packets per URB. */
+#define UVC_MAX_PACKETS 32
/* Maximum number of video buffers. */
#define UVC_MAX_VIDEO_BUFFERS 32
/* Maximum status buffer size in bytes of interrupt URB. */
@@ -316,6 +314,7 @@ struct uvc_xu_control {
#define UVC_QUIRK_STREAM_NO_FID 0x00000010
#define UVC_QUIRK_IGNORE_SELECTOR_UNIT 0x00000020
#define UVC_QUIRK_PRUNE_CONTROLS 0x00000040
+#define UVC_QUIRK_FIX_BANDWIDTH 0x00000080
/* Format flags */
#define UVC_FMT_FLAG_COMPRESSED 0x00000001
@@ -649,6 +648,7 @@ struct uvc_device {
struct urb *int_urb;
__u8 *status;
struct input_dev *input;
+ char input_phys[64];
/* Video Streaming interfaces */
struct list_head streaming;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.