1/*
2 *  ALSA interface to ivtv PCM capture streams
3 *
4 *  Copyright (C) 2009,2012  Andy Walls <awalls@md.metrocast.net>
5 *  Copyright (C) 2009  Devin Heitmueller <dheitmueller@kernellabs.com>
6 *
7 *  This program is free software; you can redistribute it and/or modify
8 *  it under the terms of the GNU General Public License as published by
9 *  the Free Software Foundation; either version 2 of the License, or
10 *  (at your option) any later version.
11 *
12 *  This program is distributed in the hope that it will be useful,
13 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
14 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 *  GNU General Public License for more details.
16 *
17 *  You should have received a copy of the GNU General Public License
18 *  along with this program; if not, write to the Free Software
19 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
20 *  02111-1307  USA
21 */
22
23struct snd_card;
24
25struct snd_ivtv_card {
26	struct v4l2_device *v4l2_dev;
27	struct snd_card *sc;
28	unsigned int capture_transfer_done;
29	unsigned int hwptr_done_capture;
30	struct snd_pcm_substream *capture_pcm_substream;
31	spinlock_t slock;
32};
33
34extern int ivtv_alsa_debug;
35
36/*
37 * File operations that manipulate the encoder or video or audio subdevices
38 * need to be serialized.  Use the same lock we use for v4l2 file ops.
39 */
40static inline void snd_ivtv_lock(struct snd_ivtv_card *itvsc)
41{
42	struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
43	mutex_lock(&itv->serialize_lock);
44}
45
46static inline void snd_ivtv_unlock(struct snd_ivtv_card *itvsc)
47{
48	struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
49	mutex_unlock(&itv->serialize_lock);
50}
51
52#define IVTV_ALSA_DBGFLG_WARN  (1 << 0)
53#define IVTV_ALSA_DBGFLG_INFO  (1 << 1)
54
55#define IVTV_ALSA_DEBUG(x, type, fmt, args...) \
56	do { \
57		if ((x) & ivtv_alsa_debug) \
58			pr_info("%s-alsa: " type ": " fmt, \
59				v4l2_dev->name , ## args); \
60	} while (0)
61
62#define IVTV_ALSA_DEBUG_WARN(fmt, args...) \
63	IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_WARN, "warning", fmt , ## args)
64
65#define IVTV_ALSA_DEBUG_INFO(fmt, args...) \
66	IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_INFO, "info", fmt , ## args)
67
68#define IVTV_ALSA_ERR(fmt, args...) \
69	pr_err("%s-alsa: " fmt, v4l2_dev->name , ## args)
70
71#define IVTV_ALSA_WARN(fmt, args...) \
72	pr_warn("%s-alsa: " fmt, v4l2_dev->name , ## args)
73
74#define IVTV_ALSA_INFO(fmt, args...) \
75	pr_info("%s-alsa: " fmt, v4l2_dev->name , ## args)
76