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[media] em28xx: rename function em28xx_isoc_copy and extend for USB bulk transfers 

The URB data processing for bulk transfers is very similar to what
is done with isoc transfers, so create a common function that works
with both transfer types based on the existing isoc function.

[mchehab@redhat.com: Fix a CodingStyle issue: don't break strings
 into separate lines]

Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Frank Schaefer 2012-11-08 14:11:45 -03:00 committed by Mauro Carvalho Chehab
parent 1653cb0cb2
commit 0fa4a40290
1 changed files with 40 additions and 25 deletions
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65
drivers/media/usb/em28xx/em28xx-video.c
View File

@ -6,6 +6,7 @@
Markus Rechberger <mrechberger@gmail.com>
Mauro Carvalho Chehab <mchehab@infradead.org>
Sascha Sommer <saschasommer@freenet.de>
Copyright (C) 2012 Frank Schäfer <fschaefer.oss@googlemail.com>
Some parts based on SN9C10x PC Camera Controllers GPL driver made
by Luca Risolia <luca.risolia@studio.unibo.it>
@ -412,16 +413,14 @@ static inline void vbi_get_next_buf(struct em28xx_dmaqueue *dma_q,
return;
}
/*
* Controls the isoc copy of each urb packet
*/
static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
/* Processes and copies the URB data content to a frame buffer queue */
static inline int em28xx_urb_data_copy(struct em28xx *dev, struct urb *urb)
{
struct em28xx_buffer *buf;
struct em28xx_dmaqueue *dma_q = &dev->vidq;
unsigned char *outp = NULL;
int i, len = 0, rc = 1;
unsigned char *p;
int xfer_bulk, num_packets, i, rc = 1;
unsigned int actual_length, len = 0;
unsigned char *p, *outp = NULL;
if (!dev)
return 0;
@ -432,32 +431,45 @@ static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
if (urb->status < 0)
print_err_status(dev, -1, urb->status);
xfer_bulk = usb_pipebulk(urb->pipe);
buf = dev->usb_ctl.vid_buf;
if (buf != NULL)
outp = videobuf_to_vmalloc(&buf->vb);
for (i = 0; i < urb->number_of_packets; i++) {
int status = urb->iso_frame_desc[i].status;
if (xfer_bulk) /* bulk */
num_packets = 1;
else /* isoc */
num_packets = urb->number_of_packets;
if (status < 0) {
print_err_status(dev, i, status);
if (urb->iso_frame_desc[i].status != -EPROTO)
for (i = 0; i < num_packets; i++) {
if (xfer_bulk) { /* bulk */
actual_length = urb->actual_length;
p = urb->transfer_buffer;
} else { /* isoc */
if (urb->iso_frame_desc[i].status < 0) {
print_err_status(dev, i,
urb->iso_frame_desc[i].status);
if (urb->iso_frame_desc[i].status != -EPROTO)
continue;
}
actual_length = urb->iso_frame_desc[i].actual_length;
if (actual_length > dev->max_pkt_size) {
em28xx_isocdbg("packet bigger than packet size");
continue;
}
p = urb->transfer_buffer +
urb->iso_frame_desc[i].offset;
}
len = urb->iso_frame_desc[i].actual_length - 4;
if (urb->iso_frame_desc[i].actual_length <= 0) {
/* em28xx_isocdbg("packet %d is empty",i); - spammy */
if (actual_length <= 0) {
/* NOTE: happens very often with isoc transfers */
/* em28xx_usbdbg("packet %d is empty",i); - spammy */
continue;
}
if (urb->iso_frame_desc[i].actual_length >
dev->max_pkt_size) {
em28xx_isocdbg("packet bigger than packet size");
continue;
}
p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
/* FIXME: incomplete buffer checks where removed to make
logic simpler. Impacts of those changes should be evaluated
@ -492,9 +504,12 @@ static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
}
if (buf != NULL) {
if (p[0] != 0x88 && p[0] != 0x22) {
/* NOTE: no intermediate data packet header
* 88 88 88 88 when using bulk transfers */
em28xx_isocdbg("frame is not complete\n");
len += 4;
len = actual_length;
} else {
len = actual_length - 4;
p += 4;
}
em28xx_copy_video(dev, dma_q, buf, p, outp, len);
@ -767,7 +782,7 @@ buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
EM28XX_NUM_BUFS,
dev->max_pkt_size,
EM28XX_NUM_ISOC_PACKETS,
em28xx_isoc_copy);
em28xx_urb_data_copy);
if (rc < 0)
goto fail;
}