1/*
2 *  ALSA interface to cx18 PCM capture streams
3 *
4 *  Copyright (C) 2009  Andy Walls <awalls@md.metrocast.net>
5 *
6 *  This program is free software; you can redistribute it and/or modify
7 *  it under the terms of the GNU General Public License as published by
8 *  the Free Software Foundation; either version 2 of the License, or
9 *  (at your option) any later version.
10 *
11 *  This program is distributed in the hope that it will be useful,
12 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 *  GNU General Public License for more details.
15 *
16 *  You should have received a copy of the GNU General Public License
17 *  along with this program; if not, write to the Free Software
18 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 *  02111-1307  USA
20 */
21
22struct snd_card;
23
24struct snd_cx18_card {
25	struct v4l2_device *v4l2_dev;
26	struct snd_card *sc;
27	unsigned int capture_transfer_done;
28	unsigned int hwptr_done_capture;
29	struct snd_pcm_substream *capture_pcm_substream;
30	spinlock_t slock;
31};
32
33extern int cx18_alsa_debug;
34
35/*
36 * File operations that manipulate the encoder or video or audio subdevices
37 * need to be serialized.  Use the same lock we use for v4l2 file ops.
38 */
39static inline void snd_cx18_lock(struct snd_cx18_card *cxsc)
40{
41	struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
42	mutex_lock(&cx->serialize_lock);
43}
44
45static inline void snd_cx18_unlock(struct snd_cx18_card *cxsc)
46{
47	struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
48	mutex_unlock(&cx->serialize_lock);
49}
50
51#define CX18_ALSA_DBGFLG_WARN  (1 << 0)
52#define CX18_ALSA_DBGFLG_WARN  (1 << 0)
53#define CX18_ALSA_DBGFLG_INFO  (1 << 1)
54
55#define CX18_ALSA_DEBUG(x, type, fmt, args...) \
56	do { \
57		if ((x) & cx18_alsa_debug) \
58			printk(KERN_INFO "%s-alsa: " type ": " fmt, \
59				v4l2_dev->name , ## args); \
60	} while (0)
61
62#define CX18_ALSA_DEBUG_WARN(fmt, args...) \
63	CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_WARN, "warning", fmt , ## args)
64
65#define CX18_ALSA_DEBUG_INFO(fmt, args...) \
66	CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_INFO, "info", fmt , ## args)
67
68#define CX18_ALSA_ERR(fmt, args...) \
69	printk(KERN_ERR "%s-alsa: " fmt, v4l2_dev->name , ## args)
70
71#define CX18_ALSA_WARN(fmt, args...) \
72	printk(KERN_WARNING "%s-alsa: " fmt, v4l2_dev->name , ## args)
73
74#define CX18_ALSA_INFO(fmt, args...) \
75	printk(KERN_INFO "%s-alsa: " fmt, v4l2_dev->name , ## args)
76