linux/drivers/media/dvb/dvb-usb/dvb-usb-urb.c

325 lines
8.3 KiB
C

/* dvb-usb-urb.c is part of the DVB USB library.
*
* Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
* see dvb-usb-init.c for copyright information.
*
* This file contains functions for initializing and handling the
* USB and URB stuff.
*/
#include "dvb-usb-common.h"
int dvb_usb_generic_rw(struct dvb_usb_device *d, u8 *wbuf, u16 wlen, u8 *rbuf,
u16 rlen, int delay_ms)
{
int actlen,ret = -ENOMEM;
if (d->props.generic_bulk_ctrl_endpoint == 0) {
err("endpoint for generic control not specified.");
return -EINVAL;
}
if (wbuf == NULL || wlen == 0)
return -EINVAL;
if ((ret = mutex_lock_interruptible(&d->usb_mutex)))
return ret;
deb_xfer(">>> ");
debug_dump(wbuf,wlen,deb_xfer);
ret = usb_bulk_msg(d->udev,usb_sndbulkpipe(d->udev,
d->props.generic_bulk_ctrl_endpoint), wbuf,wlen,&actlen,
2000);
if (ret)
err("bulk message failed: %d (%d/%d)",ret,wlen,actlen);
else
ret = actlen != wlen ? -1 : 0;
/* an answer is expected, and no error before */
if (!ret && rbuf && rlen) {
if (delay_ms)
msleep(delay_ms);
ret = usb_bulk_msg(d->udev,usb_rcvbulkpipe(d->udev,
d->props.generic_bulk_ctrl_endpoint),rbuf,rlen,&actlen,
2000);
if (ret)
err("recv bulk message failed: %d",ret);
else {
deb_xfer("<<< ");
debug_dump(rbuf,actlen,deb_xfer);
}
}
mutex_unlock(&d->usb_mutex);
return ret;
}
EXPORT_SYMBOL(dvb_usb_generic_rw);
int dvb_usb_generic_write(struct dvb_usb_device *d, u8 *buf, u16 len)
{
return dvb_usb_generic_rw(d,buf,len,NULL,0,0);
}
EXPORT_SYMBOL(dvb_usb_generic_write);
/* URB stuff for streaming */
static void dvb_usb_urb_complete(struct urb *urb, struct pt_regs *ptregs)
{
struct dvb_usb_device *d = urb->context;
int ptype = usb_pipetype(urb->pipe);
int i;
u8 *b;
deb_ts("'%s' urb completed. feedcount: %d, status: %d, length: %d/%d, pack_num: %d, errors: %d\n",
ptype == PIPE_ISOCHRONOUS ? "isoc" : "bulk", d->feedcount,
urb->status,urb->actual_length,urb->transfer_buffer_length,
urb->number_of_packets,urb->error_count);
switch (urb->status) {
case 0: /* success */
case -ETIMEDOUT: /* NAK */
break;
case -ECONNRESET: /* kill */
case -ENOENT:
case -ESHUTDOWN:
return;
default: /* error */
deb_ts("urb completition error %d.", urb->status);
break;
}
if (d->feedcount > 0) {
if (d->state & DVB_USB_STATE_DVB) {
switch (ptype) {
case PIPE_ISOCHRONOUS:
b = (u8 *) urb->transfer_buffer;
for (i = 0; i < urb->number_of_packets; i++) {
if (urb->iso_frame_desc[i].status != 0)
deb_ts("iso frame descriptor has an error: %d\n",urb->iso_frame_desc[i].status);
else if (urb->iso_frame_desc[i].actual_length > 0) {
dvb_dmx_swfilter(&d->demux,b + urb->iso_frame_desc[i].offset,
urb->iso_frame_desc[i].actual_length);
}
urb->iso_frame_desc[i].status = 0;
urb->iso_frame_desc[i].actual_length = 0;
}
debug_dump(b,20,deb_ts);
break;
case PIPE_BULK:
if (urb->actual_length > 0)
dvb_dmx_swfilter(&d->demux, (u8 *) urb->transfer_buffer,urb->actual_length);
break;
default:
err("unkown endpoint type in completition handler.");
return;
}
}
}
usb_submit_urb(urb,GFP_ATOMIC);
}
int dvb_usb_urb_kill(struct dvb_usb_device *d)
{
int i;
for (i = 0; i < d->urbs_submitted; i++) {
deb_ts("killing URB no. %d.\n",i);
/* stop the URB */
usb_kill_urb(d->urb_list[i]);
}
d->urbs_submitted = 0;
return 0;
}
int dvb_usb_urb_submit(struct dvb_usb_device *d)
{
int i,ret;
for (i = 0; i < d->urbs_initialized; i++) {
deb_ts("submitting URB no. %d\n",i);
if ((ret = usb_submit_urb(d->urb_list[i],GFP_ATOMIC))) {
err("could not submit URB no. %d - get them all back",i);
dvb_usb_urb_kill(d);
return ret;
}
d->urbs_submitted++;
}
return 0;
}
static int dvb_usb_free_stream_buffers(struct dvb_usb_device *d)
{
if (d->state & DVB_USB_STATE_URB_BUF) {
while (d->buf_num) {
d->buf_num--;
deb_mem("freeing buffer %d\n",d->buf_num);
usb_buffer_free(d->udev, d->buf_size,
d->buf_list[d->buf_num], d->dma_addr[d->buf_num]);
}
kfree(d->buf_list);
kfree(d->dma_addr);
}
d->state &= ~DVB_USB_STATE_URB_BUF;
return 0;
}
static int dvb_usb_allocate_stream_buffers(struct dvb_usb_device *d, int num, unsigned long size)
{
d->buf_num = 0;
d->buf_size = size;
deb_mem("all in all I will use %lu bytes for streaming\n",num*size);
if ((d->buf_list = kcalloc(num, sizeof(u8 *), GFP_ATOMIC)) == NULL)
return -ENOMEM;
if ((d->dma_addr = kcalloc(num, sizeof(dma_addr_t), GFP_ATOMIC)) == NULL) {
kfree(d->buf_list);
return -ENOMEM;
}
d->state |= DVB_USB_STATE_URB_BUF;
for (d->buf_num = 0; d->buf_num < num; d->buf_num++) {
deb_mem("allocating buffer %d\n",d->buf_num);
if (( d->buf_list[d->buf_num] =
usb_buffer_alloc(d->udev, size, SLAB_ATOMIC,
&d->dma_addr[d->buf_num]) ) == NULL) {
deb_mem("not enough memory for urb-buffer allocation.\n");
dvb_usb_free_stream_buffers(d);
return -ENOMEM;
}
deb_mem("buffer %d: %p (dma: %llu)\n",
d->buf_num, d->buf_list[d->buf_num],
(unsigned long long)d->dma_addr[d->buf_num]);
memset(d->buf_list[d->buf_num],0,size);
}
deb_mem("allocation successful\n");
return 0;
}
static int dvb_usb_bulk_urb_init(struct dvb_usb_device *d)
{
int i;
if ((i = dvb_usb_allocate_stream_buffers(d,d->props.urb.count,
d->props.urb.u.bulk.buffersize)) < 0)
return i;
/* allocate the URBs */
for (i = 0; i < d->props.urb.count; i++) {
if ((d->urb_list[i] = usb_alloc_urb(0,GFP_ATOMIC)) == NULL)
return -ENOMEM;
usb_fill_bulk_urb( d->urb_list[i], d->udev,
usb_rcvbulkpipe(d->udev,d->props.urb.endpoint),
d->buf_list[i],
d->props.urb.u.bulk.buffersize,
dvb_usb_urb_complete, d);
d->urb_list[i]->transfer_flags = 0;
d->urbs_initialized++;
}
return 0;
}
static int dvb_usb_isoc_urb_init(struct dvb_usb_device *d)
{
int i,j;
if ((i = dvb_usb_allocate_stream_buffers(d,d->props.urb.count,
d->props.urb.u.isoc.framesize*d->props.urb.u.isoc.framesperurb)) < 0)
return i;
/* allocate the URBs */
for (i = 0; i < d->props.urb.count; i++) {
struct urb *urb;
int frame_offset = 0;
if ((d->urb_list[i] =
usb_alloc_urb(d->props.urb.u.isoc.framesperurb,GFP_ATOMIC)) == NULL)
return -ENOMEM;
urb = d->urb_list[i];
urb->dev = d->udev;
urb->context = d;
urb->complete = dvb_usb_urb_complete;
urb->pipe = usb_rcvisocpipe(d->udev,d->props.urb.endpoint);
urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
urb->interval = d->props.urb.u.isoc.interval;
urb->number_of_packets = d->props.urb.u.isoc.framesperurb;
urb->transfer_buffer_length = d->buf_size;
urb->transfer_buffer = d->buf_list[i];
urb->transfer_dma = d->dma_addr[i];
for (j = 0; j < d->props.urb.u.isoc.framesperurb; j++) {
urb->iso_frame_desc[j].offset = frame_offset;
urb->iso_frame_desc[j].length = d->props.urb.u.isoc.framesize;
frame_offset += d->props.urb.u.isoc.framesize;
}
d->urbs_initialized++;
}
return 0;
}
int dvb_usb_urb_init(struct dvb_usb_device *d)
{
/*
* when reloading the driver w/o replugging the device
* sometimes a timeout occures, this helps
*/
if (d->props.generic_bulk_ctrl_endpoint != 0) {
usb_clear_halt(d->udev,usb_sndbulkpipe(d->udev,d->props.generic_bulk_ctrl_endpoint));
usb_clear_halt(d->udev,usb_rcvbulkpipe(d->udev,d->props.generic_bulk_ctrl_endpoint));
}
usb_clear_halt(d->udev,usb_rcvbulkpipe(d->udev,d->props.urb.endpoint));
/* allocate the array for the data transfer URBs */
d->urb_list = kzalloc(d->props.urb.count * sizeof(struct urb *),GFP_KERNEL);
if (d->urb_list == NULL)
return -ENOMEM;
d->state |= DVB_USB_STATE_URB_LIST;
switch (d->props.urb.type) {
case DVB_USB_BULK:
return dvb_usb_bulk_urb_init(d);
case DVB_USB_ISOC:
return dvb_usb_isoc_urb_init(d);
default:
err("unkown URB-type for data transfer.");
return -EINVAL;
}
}
int dvb_usb_urb_exit(struct dvb_usb_device *d)
{
int i;
dvb_usb_urb_kill(d);
if (d->state & DVB_USB_STATE_URB_LIST) {
for (i = 0; i < d->urbs_initialized; i++) {
if (d->urb_list[i] != NULL) {
deb_mem("freeing URB no. %d.\n",i);
/* free the URBs */
usb_free_urb(d->urb_list[i]);
}
}
d->urbs_initialized = 0;
/* free the urb array */
kfree(d->urb_list);
d->state &= ~DVB_USB_STATE_URB_LIST;
}
dvb_usb_free_stream_buffers(d);
return 0;
}