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(usb_dev: d->udev,usb_sndbulkpipe(d->udev,
32 d->props.generic_bulk_ctrl_endpoint), data: wbuf,len: wlen,actual_length: &actlen,
33 timeout: 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(msecs: delay_ms);
44
45 ret = usb_bulk_msg(usb_dev: 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),data: rbuf,len: rlen,actual_length: &actlen,
49 timeout: 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(lock: &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(demux: &adap->demux, buf: buffer, count: 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(demux: &adap->demux, buf: buffer, count: 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(demux: &adap->demux, buf: buffer, count: 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(stream: &adap->fe_adap[i].stream,
109 props: &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(stream: &adap->fe_adap[i].stream);
121 return 0;
122}
123

source code of linux/drivers/media/usb/dvb-usb/dvb-usb-urb.c