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
dvb_usb_generic_rw(struct dvb_usb_device * d,u8 * wbuf,u16 wlen,u8 * rbuf,u16 rlen,int delay_ms)11 int 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 || wbuf == NULL || wlen == 0)
17 return -EINVAL;
18
19 if (d->props.generic_bulk_ctrl_endpoint == 0) {
20 err("endpoint for generic control not specified.");
21 return -EINVAL;
22 }
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 }
59 EXPORT_SYMBOL(dvb_usb_generic_rw);
60
dvb_usb_generic_write(struct dvb_usb_device * d,u8 * buf,u16 len)61 int 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 }
65 EXPORT_SYMBOL(dvb_usb_generic_write);
66
dvb_usb_data_complete(struct usb_data_stream * stream,u8 * buffer,size_t length)67 static 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
dvb_usb_data_complete_204(struct usb_data_stream * stream,u8 * buffer,size_t length)74 static 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
dvb_usb_adapter_stream_init(struct dvb_usb_adapter * adap)81 int 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
dvb_usb_adapter_stream_exit(struct dvb_usb_adapter * adap)92 int dvb_usb_adapter_stream_exit(struct dvb_usb_adapter *adap)
93 {
94 return usb_urb_exit(&adap->stream);
95 }
96