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V4L/DVB (12829): tm6000: several changes on usb preparation trying to avoid -EPROTO errors 

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
hifive-unleashed-5.1
Mauro Carvalho Chehab 2008-01-10 17:27:26 -03:00
parent c4acf48cad
commit ee1fc07c9f
1 changed files with 49 additions and 47 deletions
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96
drivers/staging/tm6000/tm6000-video.c
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@ -47,6 +47,8 @@
#define TM6000_MIN_BUF 4
#define TM6000_DEF_BUF 8
#define TM6000_MAX_ISO_PACKETS 40 /* Max number of ISO packets */
/* Declare static vars that will be used as parameters */
static unsigned int vid_limit = 16; /* Video memory limit, in Mb */
static int video_nr = -1; /* /dev/videoN, -1 for autodetect */
@ -532,7 +534,7 @@ static void tm6000_irq_callback(struct urb *urb)
struct tm6000_buffer *buf;
struct tm6000_dmaqueue *dma_q = urb->context;
struct tm6000_core *dev = container_of(dma_q, struct tm6000_core, vidq);
int rc, i;
int rc;
unsigned long flags;
spin_lock_irqsave(&dev->slock, flags);
@ -550,11 +552,6 @@ static void tm6000_irq_callback(struct urb *urb)
dev->isoc_ctl.buf = buf;
ret:
/* Reset urb buffers */
for (i = 0; i < urb->number_of_packets; i++) {
urb->iso_frame_desc[i].status = 0;
urb->iso_frame_desc[i].actual_length = 0;
}
urb->status = usb_submit_urb(urb, GFP_ATOMIC);
if (urb->status)
@ -576,8 +573,8 @@ static void tm6000_uninit_isoc(struct tm6000_core *dev)
struct urb *urb;
int i;
dev->isoc_ctl.nfields=-1;
dev->isoc_ctl.buf=NULL;
dev->isoc_ctl.nfields = -1;
dev->isoc_ctl.buf = NULL;
for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
urb=dev->isoc_ctl.urb[i];
if (urb) {
@ -613,38 +610,47 @@ static void tm6000_stop_thread(struct tm6000_dmaqueue *dma_q)
tm6000_uninit_isoc(dev);
}
/*
* Allocate URBs and start IRQ
*/
static int tm6000_prepare_isoc(struct tm6000_core *dev,
int max_packets, int num_bufs)
static int tm6000_prepare_isoc(struct tm6000_core *dev, unsigned int framesize)
{
struct tm6000_dmaqueue *dma_q = &dev->vidq;
int i;
int sb_size, pipe;
int i, j, sb_size, pipe, size, max_packets, num_bufs = 5;
struct urb *urb;
int j, k;
dprintk(dev, V4L2_DEBUG_QUEUE, "Allocating %dx%d packets"
" of %d bytes each to handle %u size\n",
max_packets, num_bufs,
dev->max_isoc_in, dev->isoc_ctl.max_pkt_size);
/* De-allocates all pending stuff */
tm6000_uninit_isoc(dev);
dev->isoc_ctl.num_bufs=num_bufs;
dev->isoc_ctl.urb=kmalloc(sizeof(void *)*num_bufs,
GFP_KERNEL);
pipe = usb_rcvisocpipe(dev->udev,
dev->isoc_in->desc.bEndpointAddress &
USB_ENDPOINT_NUMBER_MASK);
size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe));
if (size > dev->max_isoc_in)
size = dev->max_isoc_in;
dev->isoc_ctl.max_pkt_size = size;
max_packets = ( framesize + size - 1) / size;
if (max_packets > TM6000_MAX_ISO_PACKETS)
max_packets = TM6000_MAX_ISO_PACKETS;
sb_size = max_packets * size;
dev->isoc_ctl.num_bufs = num_bufs;
dev->isoc_ctl.urb = kmalloc(sizeof(void *)*num_bufs,
GFP_KERNEL);
if (!dev->isoc_ctl.urb) {
tm6000_err("cannot alloc memory for usb buffers\n");
return -ENOMEM;
}
dev->isoc_ctl.transfer_buffer=kmalloc(sizeof(void *)*num_bufs,
dev->isoc_ctl.transfer_buffer = kmalloc(sizeof(void *)*num_bufs,
GFP_KERNEL);
if (!dev->isoc_ctl.urb) {
tm6000_err("cannot allocate memory for usbtransfer\n");
@ -652,9 +658,10 @@ static int tm6000_prepare_isoc(struct tm6000_core *dev,
return -ENOMEM;
}
dev->isoc_ctl.max_pkt_size=dev->max_isoc_in;
sb_size = max_packets * dev->isoc_ctl.max_pkt_size;
dprintk(dev, V4L2_DEBUG_QUEUE, "Allocating %d x %d packets"
" (%d bytes) of %d bytes each to handle %u size\n",
max_packets, num_bufs, sb_size,
dev->max_isoc_in, size);
/* allocate urbs and transfer buffers */
@ -680,23 +687,17 @@ static int tm6000_prepare_isoc(struct tm6000_core *dev,
}
memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size);
pipe=usb_rcvisocpipe(dev->udev,
dev->isoc_in->desc.bEndpointAddress &
USB_ENDPOINT_NUMBER_MASK);
usb_fill_int_urb(urb, dev->udev, pipe,
dev->isoc_ctl.transfer_buffer[i],sb_size,
tm6000_irq_callback, dma_q,
dev->isoc_in->desc.bInterval);
usb_fill_bulk_urb(urb, dev->udev, pipe,
dev->isoc_ctl.transfer_buffer[i], sb_size,
tm6000_irq_callback, dma_q);
// urb->interval = dev->isoc_in->desc.bInterval;
urb->interval = 2;
urb->number_of_packets = max_packets;
urb->transfer_flags = URB_ISO_ASAP;
urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
k = 0;
for (j = 0; j < max_packets; j++) {
urb->iso_frame_desc[j].offset = k;
urb->iso_frame_desc[j].length =
dev->isoc_ctl.max_pkt_size;
k += dev->isoc_ctl.max_pkt_size;
urb->iso_frame_desc[j].offset = size * j;
urb->iso_frame_desc[j].length = size;
}
}
@ -881,17 +882,18 @@ buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
}
if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
if (0 != (rc = videobuf_iolock(vq,&buf->vb,NULL)))
if (0 != (rc = videobuf_iolock(vq, &buf->vb, NULL)))
goto fail;
urb_init=1;
urb_init = 1;
}
if (!dev->isoc_ctl.num_bufs)
urb_init=1;
urb_init = 1;
if (urb_init) {
rc = tm6000_prepare_isoc(dev, 128, 1);
if (rc<0)
rc = tm6000_prepare_isoc(dev, buf->vb.size);
if (rc < 0)
goto fail;
}
@ -899,7 +901,7 @@ buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
return 0;
fail:
free_buffer(vq,buf);
free_buffer(vq, buf);
return rc;
}