V4L/DVB (8910): gspca: Add support of image transfer by bulk and minor change.
- image transfer by bulk - set the max number of transfer URS's to 4 (was 16) Signed-off-by: Jean-Francois Moine <moinejf@free.fr> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jean-Francois Moine
Mauro Carvalho Chehab
parent
d45b9b8ab4
commit
0be01004dd
2 changed files with 91 additions and 29 deletions
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@ -177,6 +177,48 @@ static void isoc_irq(struct urb *urb
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fill_frame(gspca_dev, urb);
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}
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/*
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* bulk message interrupt from the USB device
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*/
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static void bulk_irq(struct urb *urb
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)
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{
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struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
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struct gspca_frame *frame;
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int j, ret;
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PDEBUG(D_PACK, "bulk irq");
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if (!gspca_dev->streaming)
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return;
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if (urb->status != 0 && urb->status != -ECONNRESET) {
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#ifdef CONFIG_PM
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if (!gspca_dev->frozen)
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#endif
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PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
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return; /* disconnection ? */
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}
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/* check the availability of the frame buffer */
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j = gspca_dev->fr_i;
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j = gspca_dev->fr_queue[j];
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frame = &gspca_dev->frame[j];
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if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
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!= V4L2_BUF_FLAG_QUEUED) {
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gspca_dev->last_packet_type = DISCARD_PACKET;
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} else {
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PDEBUG(D_PACK, "packet l:%d", urb->actual_length);
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gspca_dev->sd_desc->pkt_scan(gspca_dev,
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frame,
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urb->transfer_buffer,
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urb->actual_length);
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}
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/* resubmit the URB */
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urb->status = 0;
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ret = usb_submit_urb(urb, GFP_ATOMIC);
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if (ret < 0)
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PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", ret);
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}
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/*
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* add data to the current frame
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*
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@ -374,10 +416,11 @@ static void destroy_urbs(struct gspca_dev *gspca_dev)
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}
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/*
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* search an input isochronous endpoint in an alternate setting
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* search an input transfer endpoint in an alternate setting
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*/
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static struct usb_host_endpoint *alt_isoc(struct usb_host_interface *alt,
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__u8 epaddr)
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static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
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__u8 epaddr,
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__u8 xfer)
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{
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struct usb_host_endpoint *ep;
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int i, attr;
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@ -388,7 +431,7 @@ static struct usb_host_endpoint *alt_isoc(struct usb_host_interface *alt,
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if (ep->desc.bEndpointAddress == epaddr) {
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attr = ep->desc.bmAttributes
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& USB_ENDPOINT_XFERTYPE_MASK;
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if (attr == USB_ENDPOINT_XFER_ISOC)
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if (attr == xfer)
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return ep;
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break;
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}
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@ -397,14 +440,14 @@ static struct usb_host_endpoint *alt_isoc(struct usb_host_interface *alt,
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}
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/*
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* search an input isochronous endpoint
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* search an input (isoc or bulk) endpoint
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*
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* The endpoint is defined by the subdriver.
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* Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep).
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* This routine may be called many times when the bandwidth is too small
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* (the bandwidth is checked on urb submit).
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*/
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static struct usb_host_endpoint *get_isoc_ep(struct gspca_dev *gspca_dev)
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static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev)
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{
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struct usb_interface *intf;
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struct usb_host_endpoint *ep;
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@ -414,15 +457,19 @@ static struct usb_host_endpoint *get_isoc_ep(struct gspca_dev *gspca_dev)
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ep = NULL;
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i = gspca_dev->alt; /* previous alt setting */
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while (--i > 0) { /* alt 0 is unusable */
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ep = alt_isoc(&intf->altsetting[i], gspca_dev->cam.epaddr);
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ep = alt_xfer(&intf->altsetting[i],
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gspca_dev->cam.epaddr,
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gspca_dev->bulk
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? USB_ENDPOINT_XFER_BULK
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: USB_ENDPOINT_XFER_ISOC);
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if (ep)
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break;
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}
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if (ep == NULL) {
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err("no ISOC endpoint found");
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err("no transfer endpoint found");
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return NULL;
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}
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PDEBUG(D_STREAM, "use ISOC alt %d ep 0x%02x",
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PDEBUG(D_STREAM, "use alt %d ep 0x%02x",
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i, ep->desc.bEndpointAddress);
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ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i);
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if (ret < 0) {
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@ -434,7 +481,7 @@ static struct usb_host_endpoint *get_isoc_ep(struct gspca_dev *gspca_dev)
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}
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/*
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* create the isochronous URBs
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* create the URBs for image transfer
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*/
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static int create_urbs(struct gspca_dev *gspca_dev,
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struct usb_host_endpoint *ep)
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@ -447,12 +494,20 @@ static int create_urbs(struct gspca_dev *gspca_dev,
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/* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
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psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
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npkt = ISO_MAX_SIZE / psize;
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if (npkt > ISO_MAX_PKT)
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npkt = ISO_MAX_PKT;
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bsize = psize * npkt;
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PDEBUG(D_STREAM,
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"isoc %d pkts size %d (bsize:%d)", npkt, psize, bsize);
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if (!gspca_dev->bulk) {
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npkt = ISO_MAX_SIZE / psize;
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if (npkt > ISO_MAX_PKT)
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npkt = ISO_MAX_PKT;
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bsize = psize * npkt;
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PDEBUG(D_STREAM,
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"isoc %d pkts size %d = bsize:%d",
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npkt, psize, bsize);
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} else {
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npkt = 0;
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bsize = psize;
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PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
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}
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nurbs = DEF_NURBS;
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gspca_dev->nurbs = nurbs;
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for (n = 0; n < nurbs; n++) {
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@ -476,17 +531,23 @@ static int create_urbs(struct gspca_dev *gspca_dev,
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gspca_dev->urb[n] = urb;
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urb->dev = gspca_dev->dev;
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urb->context = gspca_dev;
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urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
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ep->desc.bEndpointAddress);
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urb->transfer_flags = URB_ISO_ASAP
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| URB_NO_TRANSFER_DMA_MAP;
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urb->interval = ep->desc.bInterval;
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urb->complete = isoc_irq;
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urb->number_of_packets = npkt;
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urb->transfer_buffer_length = bsize;
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for (i = 0; i < npkt; i++) {
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urb->iso_frame_desc[i].length = psize;
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urb->iso_frame_desc[i].offset = psize * i;
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if (npkt != 0) { /* ISOC */
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urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
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ep->desc.bEndpointAddress);
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urb->transfer_flags = URB_ISO_ASAP
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| URB_NO_TRANSFER_DMA_MAP;
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urb->interval = ep->desc.bInterval;
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urb->complete = isoc_irq;
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urb->number_of_packets = npkt;
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for (i = 0; i < npkt; i++) {
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urb->iso_frame_desc[i].length = psize;
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urb->iso_frame_desc[i].offset = psize * i;
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}
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} else { /* bulk */
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urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
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ep->desc.bEndpointAddress),
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urb->complete = bulk_irq;
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}
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}
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return 0;
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@ -508,7 +569,7 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev)
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gspca_dev->alt = gspca_dev->nbalt;
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for (;;) {
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PDEBUG(D_STREAM, "init transfer alt %d", gspca_dev->alt);
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ep = get_isoc_ep(gspca_dev);
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ep = get_ep(gspca_dev);
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if (ep == NULL) {
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ret = -EIO;
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goto out;
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@ -49,8 +49,8 @@ extern int gspca_debug;
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} while (0)
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#define GSPCA_MAX_FRAMES 16 /* maximum number of video frame buffers */
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/* ISOC transfers */
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#define MAX_NURBS 16 /* max number of URBs */
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/* image transfers */
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#define MAX_NURBS 4 /* max number of URBs */
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#define ISO_MAX_PKT 32 /* max number of packets in an ISOC transfer */
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#define ISO_MAX_SIZE 0x8000 /* max size of one URB buffer (32 Kb) */
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@ -143,6 +143,7 @@ struct gspca_dev {
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__u8 iface; /* USB interface number */
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__u8 alt; /* USB alternate setting */
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__u8 bulk; /* image transfer by isoc (0) or bulk (1) */
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__u8 curr_mode; /* current camera mode */
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__u32 pixfmt; /* current mode parameters */
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__u16 width;
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