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
22 struct snd_card;
23
24 struct 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
33 extern 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 */
snd_cx18_lock(struct snd_cx18_card * cxsc)39 static 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
snd_cx18_unlock(struct snd_cx18_card * cxsc)45 static 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_INFO (1 << 1)
53
54 #define CX18_ALSA_DEBUG(x, type, fmt, args...) \
55 do { \
56 if ((x) & cx18_alsa_debug) \
57 printk(KERN_INFO "%s-alsa: " type ": " fmt, \
58 v4l2_dev->name , ## args); \
59 } while (0)
60
61 #define CX18_ALSA_DEBUG_WARN(fmt, args...) \
62 CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_WARN, "warning", fmt , ## args)
63
64 #define CX18_ALSA_DEBUG_INFO(fmt, args...) \
65 CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_INFO, "info", fmt , ## args)
66
67 #define CX18_ALSA_ERR(fmt, args...) \
68 printk(KERN_ERR "%s-alsa: " fmt, v4l2_dev->name , ## args)
69
70 #define CX18_ALSA_WARN(fmt, args...) \
71 printk(KERN_WARNING "%s-alsa: " fmt, v4l2_dev->name , ## args)
72
73 #define CX18_ALSA_INFO(fmt, args...) \
74 printk(KERN_INFO "%s-alsa: " fmt, v4l2_dev->name , ## args)
75