1// SPDX-License-Identifier: GPL-2.0
2/* dvb-usb-urb.c is part of the DVB USB library.
3 *
4 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de)
5 * see dvb-usb-init.c for copyright information.
6 *
7 * This file keeps functions for initializing and handling the
8 * USB and URB stuff.
9 */
10#include "dvb-usb-common.h"
11
12int dvb_usb_generic_rw(struct dvb_usb_device *d, u8 *wbuf, u16 wlen, u8 *rbuf,
13	u16 rlen, int delay_ms)
14{
15	int actlen = 0, ret = -ENOMEM;
16
17	if (!d || wbuf == NULL || wlen == 0)
18		return -EINVAL;
19
20	if (d->props.generic_bulk_ctrl_endpoint == 0) {
21		err("endpoint for generic control not specified.");
22		return -EINVAL;
23	}
24
25	if ((ret = mutex_lock_interruptible(&d->usb_mutex)))
26		return ret;
27
28	deb_xfer(">>> ");
29	debug_dump(wbuf,wlen,deb_xfer);
30
31	ret = usb_bulk_msg(d->udev,usb_sndbulkpipe(d->udev,
32			d->props.generic_bulk_ctrl_endpoint), wbuf,wlen,&actlen,
33			2000);
34
35	if (ret)
36		err("bulk message failed: %d (%d/%d)",ret,wlen,actlen);
37	else
38		ret = actlen != wlen ? -1 : 0;
39
40	/* an answer is expected, and no error before */
41	if (!ret && rbuf && rlen) {
42		if (delay_ms)
43			msleep(delay_ms);
44
45		ret = usb_bulk_msg(d->udev,usb_rcvbulkpipe(d->udev,
46				d->props.generic_bulk_ctrl_endpoint_response ?
47				d->props.generic_bulk_ctrl_endpoint_response :
48				d->props.generic_bulk_ctrl_endpoint),rbuf,rlen,&actlen,
49				2000);
50
51		if (ret)
52			err("recv bulk message failed: %d",ret);
53		else {
54			deb_xfer("<<< ");
55			debug_dump(rbuf,actlen,deb_xfer);
56		}
57	}
58
59	mutex_unlock(&d->usb_mutex);
60	return ret;
61}
62EXPORT_SYMBOL(dvb_usb_generic_rw);
63
64int dvb_usb_generic_write(struct dvb_usb_device *d, u8 *buf, u16 len)
65{
66	return dvb_usb_generic_rw(d,buf,len,NULL,0,0);
67}
68EXPORT_SYMBOL(dvb_usb_generic_write);
69
70static void dvb_usb_data_complete(struct usb_data_stream *stream, u8 *buffer, size_t length)
71{
72	struct dvb_usb_adapter *adap = stream->user_priv;
73	if (adap->feedcount > 0 && adap->state & DVB_USB_ADAP_STATE_DVB)
74		dvb_dmx_swfilter(&adap->demux, buffer, length);
75}
76
77static void dvb_usb_data_complete_204(struct usb_data_stream *stream, u8 *buffer, size_t length)
78{
79	struct dvb_usb_adapter *adap = stream->user_priv;
80	if (adap->feedcount > 0 && adap->state & DVB_USB_ADAP_STATE_DVB)
81		dvb_dmx_swfilter_204(&adap->demux, buffer, length);
82}
83
84static void dvb_usb_data_complete_raw(struct usb_data_stream *stream,
85				      u8 *buffer, size_t length)
86{
87	struct dvb_usb_adapter *adap = stream->user_priv;
88	if (adap->feedcount > 0 && adap->state & DVB_USB_ADAP_STATE_DVB)
89		dvb_dmx_swfilter_raw(&adap->demux, buffer, length);
90}
91
92int dvb_usb_adapter_stream_init(struct dvb_usb_adapter *adap)
93{
94	int i, ret = 0;
95	for (i = 0; i < adap->props.num_frontends; i++) {
96
97		adap->fe_adap[i].stream.udev      = adap->dev->udev;
98		if (adap->props.fe[i].caps & DVB_USB_ADAP_RECEIVES_204_BYTE_TS)
99			adap->fe_adap[i].stream.complete =
100				dvb_usb_data_complete_204;
101		else
102		if (adap->props.fe[i].caps & DVB_USB_ADAP_RECEIVES_RAW_PAYLOAD)
103			adap->fe_adap[i].stream.complete =
104				dvb_usb_data_complete_raw;
105		else
106		adap->fe_adap[i].stream.complete  = dvb_usb_data_complete;
107		adap->fe_adap[i].stream.user_priv = adap;
108		ret = usb_urb_init(&adap->fe_adap[i].stream,
109				   &adap->props.fe[i].stream);
110		if (ret < 0)
111			break;
112	}
113	return ret;
114}
115
116int dvb_usb_adapter_stream_exit(struct dvb_usb_adapter *adap)
117{
118	int i;
119	for (i = 0; i < adap->props.num_frontends; i++)
120		usb_urb_exit(&adap->fe_adap[i].stream);
121	return 0;
122}
123