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/* 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 = down_interruptible(&d->usb_sem)))
return ret;
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,
2*HZ);
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,
2*HZ);
if (ret)
err("recv bulk message failed: %d",ret);
else
debug_dump(rbuf,actlen,deb_xfer);
}
up(&d->usb_sem);
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);
static void dvb_usb_bulk_urb_complete(struct urb *urb, struct pt_regs *ptregs)
{
struct dvb_usb_device *d = urb->context;
deb_ts("bulk urb completed. feedcount: %d, status: %d, length: %d\n",d->feedcount,urb->status,
urb->actual_length);
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 && urb->actual_length > 0) {
if (d->state & DVB_USB_STATE_DVB)
dvb_dmx_swfilter(&d->demux, (u8*) urb->transfer_buffer,urb->actual_length);
} else
deb_ts("URB dropped because of feedcount.\n");
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_info("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_info("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\n",i);
dvb_usb_urb_kill(d);
return ret;
}
d->urbs_submitted++;
}
return 0;
}
static int dvb_usb_bulk_urb_init(struct dvb_usb_device *d)
{
int i,bufsize = d->props.urb.count * d->props.urb.u.bulk.buffersize;
deb_info("allocate %d bytes as buffersize for all URBs\n",bufsize);
/* allocate the actual buffer for the URBs */
if ((d->buffer = usb_buffer_alloc(d->udev, bufsize, SLAB_ATOMIC, &d->dma_handle)) == NULL) {
deb_info("not enough memory for urb-buffer allocation.\n");
return -ENOMEM;
}
deb_info("allocation successful\n");
memset(d->buffer,0,bufsize);
d->state |= DVB_USB_STATE_URB_BUF;
/* allocate the URBs */
for (i = 0; i < d->props.urb.count; i++) {
if (!(d->urb_list[i] = usb_alloc_urb(0,GFP_ATOMIC))) {
return -ENOMEM;
}
usb_fill_bulk_urb( d->urb_list[i], d->udev,
usb_rcvbulkpipe(d->udev,d->props.urb.endpoint),
&d->buffer[i*d->props.urb.u.bulk.buffersize],
d->props.urb.u.bulk.buffersize,
dvb_usb_bulk_urb_complete, d);
d->urb_list[i]->transfer_flags = 0;
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 = kmalloc(d->props.urb.count * sizeof(struct urb *),GFP_KERNEL);
if (d->urb_list == NULL)
return -ENOMEM;
memset(d->urb_list,0,d->props.urb.count * sizeof(struct urb *));
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:
err("isochronous transfer not yet implemented in dvb-usb.");
return -EINVAL;
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_info("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;
}
if (d->state & DVB_USB_STATE_URB_BUF)
usb_buffer_free(d->udev, d->props.urb.u.bulk.buffersize * d->props.urb.count,
d->buffer, d->dma_handle);
d->state &= ~DVB_USB_STATE_URB_BUF;
return 0;
}
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