1/* dvb-usb-urb.c is part of the DVB USB library.
2 *
3 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)
4 * see dvb-usb-init.c for copyright information.
5 *
6 * This file keeps functions for initializing and handling the
7 * USB and URB stuff.
8 */
9#include "dvb-usb-common.h"
10
11int dvb_usb_generic_rw(struct dvb_usb_device *d, u8 *wbuf, u16 wlen, u8 *rbuf,
12	u16 rlen, int delay_ms)
13{
14	int actlen,ret = -ENOMEM;
15
16	if (d->props.generic_bulk_ctrl_endpoint == 0) {
17		err("endpoint for generic control not specified.");
18		return -EINVAL;
19	}
20
21	if (wbuf == NULL || wlen == 0)
22		return -EINVAL;
23
24	if ((ret = mutex_lock_interruptible(&d->usb_mutex)))
25		return ret;
26
27	deb_xfer(">>> ");
28	debug_dump(wbuf,wlen,deb_xfer);
29
30	ret = usb_bulk_msg(d->udev,usb_sndbulkpipe(d->udev,
31			d->props.generic_bulk_ctrl_endpoint), wbuf,wlen,&actlen,
32			2000);
33
34	if (ret)
35		err("bulk message failed: %d (%d/%d)",ret,wlen,actlen);
36	else
37		ret = actlen != wlen ? -1 : 0;
38
39	/* an answer is expected, and no error before */
40	if (!ret && rbuf && rlen) {
41		if (delay_ms)
42			msleep(delay_ms);
43
44		ret = usb_bulk_msg(d->udev,usb_rcvbulkpipe(d->udev,
45				d->props.generic_bulk_ctrl_endpoint),rbuf,rlen,&actlen,
46				2000);
47
48		if (ret)
49			err("recv bulk message failed: %d",ret);
50		else {
51			deb_xfer("<<< ");
52			debug_dump(rbuf,actlen,deb_xfer);
53		}
54	}
55
56	mutex_unlock(&d->usb_mutex);
57	return ret;
58}
59EXPORT_SYMBOL(dvb_usb_generic_rw);
60
61int dvb_usb_generic_write(struct dvb_usb_device *d, u8 *buf, u16 len)
62{
63	return dvb_usb_generic_rw(d,buf,len,NULL,0,0);
64}
65EXPORT_SYMBOL(dvb_usb_generic_write);
66
67static void dvb_usb_data_complete(struct usb_data_stream *stream, u8 *buffer, size_t length)
68{
69	struct dvb_usb_adapter *adap = stream->user_priv;
70	if (adap->feedcount > 0 && adap->state & DVB_USB_ADAP_STATE_DVB)
71		dvb_dmx_swfilter(&adap->demux, buffer, length);
72}
73
74static void dvb_usb_data_complete_204(struct usb_data_stream *stream, u8 *buffer, size_t length)
75{
76	struct dvb_usb_adapter *adap = stream->user_priv;
77	if (adap->feedcount > 0 && adap->state & DVB_USB_ADAP_STATE_DVB)
78		dvb_dmx_swfilter_204(&adap->demux, buffer, length);
79}
80
81int dvb_usb_adapter_stream_init(struct dvb_usb_adapter *adap)
82{
83	adap->stream.udev      = adap->dev->udev;
84	if (adap->props.caps & DVB_USB_ADAP_RECEIVES_204_BYTE_TS)
85		adap->stream.complete = dvb_usb_data_complete_204;
86	else
87	adap->stream.complete  = dvb_usb_data_complete;
88	adap->stream.user_priv = adap;
89	return usb_urb_init(&adap->stream, &adap->props.stream);
90}
91
92int dvb_usb_adapter_stream_exit(struct dvb_usb_adapter *adap)
93{
94	return usb_urb_exit(&adap->stream);
95}
96