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path: root/drivers/media/video/gspca/gspca.c
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Diffstat (limited to 'drivers/media/video/gspca/gspca.c')
-rw-r--r--drivers/media/video/gspca/gspca.c115
1 files changed, 88 insertions, 27 deletions
diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index ac95c55887df..496d58d479da 100644
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -178,6 +178,48 @@ static void isoc_irq(struct urb *urb
}
/*
+ * bulk message interrupt from the USB device
+ */
+static void bulk_irq(struct urb *urb
+)
+{
+ struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
+ struct gspca_frame *frame;
+ int j, ret;
+
+ PDEBUG(D_PACK, "bulk irq");
+ if (!gspca_dev->streaming)
+ return;
+ if (urb->status != 0 && urb->status != -ECONNRESET) {
+#ifdef CONFIG_PM
+ if (!gspca_dev->frozen)
+#endif
+ PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
+ return; /* disconnection ? */
+ }
+
+ /* check the availability of the frame buffer */
+ j = gspca_dev->fr_i;
+ j = gspca_dev->fr_queue[j];
+ frame = &gspca_dev->frame[j];
+ if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
+ != V4L2_BUF_FLAG_QUEUED) {
+ gspca_dev->last_packet_type = DISCARD_PACKET;
+ } else {
+ PDEBUG(D_PACK, "packet l:%d", urb->actual_length);
+ gspca_dev->sd_desc->pkt_scan(gspca_dev,
+ frame,
+ urb->transfer_buffer,
+ urb->actual_length);
+ }
+ /* resubmit the URB */
+ urb->status = 0;
+ ret = usb_submit_urb(urb, GFP_ATOMIC);
+ if (ret < 0)
+ PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", ret);
+}
+
+/*
* add data to the current frame
*
* This function is called by the subdrivers at interrupt level.
@@ -374,10 +416,11 @@ static void destroy_urbs(struct gspca_dev *gspca_dev)
}
/*
- * search an input isochronous endpoint in an alternate setting
+ * search an input transfer endpoint in an alternate setting
*/
-static struct usb_host_endpoint *alt_isoc(struct usb_host_interface *alt,
- __u8 epaddr)
+static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
+ __u8 epaddr,
+ __u8 xfer)
{
struct usb_host_endpoint *ep;
int i, attr;
@@ -388,7 +431,7 @@ static struct usb_host_endpoint *alt_isoc(struct usb_host_interface *alt,
if (ep->desc.bEndpointAddress == epaddr) {
attr = ep->desc.bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK;
- if (attr == USB_ENDPOINT_XFER_ISOC)
+ if (attr == xfer)
return ep;
break;
}
@@ -397,14 +440,14 @@ static struct usb_host_endpoint *alt_isoc(struct usb_host_interface *alt,
}
/*
- * search an input isochronous endpoint
+ * search an input (isoc or bulk) endpoint
*
* The endpoint is defined by the subdriver.
* Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep).
* This routine may be called many times when the bandwidth is too small
* (the bandwidth is checked on urb submit).
*/
-static struct usb_host_endpoint *get_isoc_ep(struct gspca_dev *gspca_dev)
+static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev)
{
struct usb_interface *intf;
struct usb_host_endpoint *ep;
@@ -414,15 +457,19 @@ static struct usb_host_endpoint *get_isoc_ep(struct gspca_dev *gspca_dev)
ep = NULL;
i = gspca_dev->alt; /* previous alt setting */
while (--i > 0) { /* alt 0 is unusable */
- ep = alt_isoc(&intf->altsetting[i], gspca_dev->cam.epaddr);
+ ep = alt_xfer(&intf->altsetting[i],
+ gspca_dev->cam.epaddr,
+ gspca_dev->bulk
+ ? USB_ENDPOINT_XFER_BULK
+ : USB_ENDPOINT_XFER_ISOC);
if (ep)
break;
}
if (ep == NULL) {
- err("no ISOC endpoint found");
+ err("no transfer endpoint found");
return NULL;
}
- PDEBUG(D_STREAM, "use ISOC alt %d ep 0x%02x",
+ PDEBUG(D_STREAM, "use alt %d ep 0x%02x",
i, ep->desc.bEndpointAddress);
ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i);
if (ret < 0) {
@@ -434,7 +481,7 @@ static struct usb_host_endpoint *get_isoc_ep(struct gspca_dev *gspca_dev)
}
/*
- * create the isochronous URBs
+ * create the URBs for image transfer
*/
static int create_urbs(struct gspca_dev *gspca_dev,
struct usb_host_endpoint *ep)
@@ -447,12 +494,20 @@ static int create_urbs(struct gspca_dev *gspca_dev,
/* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
- npkt = ISO_MAX_SIZE / psize;
- if (npkt > ISO_MAX_PKT)
- npkt = ISO_MAX_PKT;
- bsize = psize * npkt;
- PDEBUG(D_STREAM,
- "isoc %d pkts size %d (bsize:%d)", npkt, psize, bsize);
+ if (!gspca_dev->bulk) {
+ npkt = ISO_MAX_SIZE / psize;
+ if (npkt > ISO_MAX_PKT)
+ npkt = ISO_MAX_PKT;
+ bsize = psize * npkt;
+ PDEBUG(D_STREAM,
+ "isoc %d pkts size %d = bsize:%d",
+ npkt, psize, bsize);
+ } else {
+ npkt = 0;
+ bsize = psize;
+ PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
+ }
+
nurbs = DEF_NURBS;
gspca_dev->nurbs = nurbs;
for (n = 0; n < nurbs; n++) {
@@ -476,17 +531,23 @@ static int create_urbs(struct gspca_dev *gspca_dev,
gspca_dev->urb[n] = urb;
urb->dev = gspca_dev->dev;
urb->context = gspca_dev;
- urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
- ep->desc.bEndpointAddress);
- urb->transfer_flags = URB_ISO_ASAP
- | URB_NO_TRANSFER_DMA_MAP;
- urb->interval = ep->desc.bInterval;
- urb->complete = isoc_irq;
- urb->number_of_packets = npkt;
urb->transfer_buffer_length = bsize;
- for (i = 0; i < npkt; i++) {
- urb->iso_frame_desc[i].length = psize;
- urb->iso_frame_desc[i].offset = psize * i;
+ if (npkt != 0) { /* ISOC */
+ urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
+ ep->desc.bEndpointAddress);
+ urb->transfer_flags = URB_ISO_ASAP
+ | URB_NO_TRANSFER_DMA_MAP;
+ urb->interval = ep->desc.bInterval;
+ urb->complete = isoc_irq;
+ urb->number_of_packets = npkt;
+ for (i = 0; i < npkt; i++) {
+ urb->iso_frame_desc[i].length = psize;
+ urb->iso_frame_desc[i].offset = psize * i;
+ }
+ } else { /* bulk */
+ urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
+ ep->desc.bEndpointAddress),
+ urb->complete = bulk_irq;
}
}
return 0;
@@ -508,7 +569,7 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev)
gspca_dev->alt = gspca_dev->nbalt;
for (;;) {
PDEBUG(D_STREAM, "init transfer alt %d", gspca_dev->alt);
- ep = get_isoc_ep(gspca_dev);
+ ep = get_ep(gspca_dev);
if (ep == NULL) {
ret = -EIO;
goto out;
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