1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * ALSA interface to cx18 PCM capture streams
4 *
5 * Copyright (C) 2009 Andy Walls <awalls@md.metrocast.net>
6 */
7
8 struct snd_card;
9
10 struct snd_cx18_card {
11 struct v4l2_device *v4l2_dev;
12 struct snd_card *sc;
13 unsigned int capture_transfer_done;
14 unsigned int hwptr_done_capture;
15 struct snd_pcm_substream *capture_pcm_substream;
16 spinlock_t slock;
17 };
18
19 extern int cx18_alsa_debug;
20
21 /*
22 * File operations that manipulate the encoder or video or audio subdevices
23 * need to be serialized. Use the same lock we use for v4l2 file ops.
24 */
snd_cx18_lock(struct snd_cx18_card * cxsc)25 static inline void snd_cx18_lock(struct snd_cx18_card *cxsc)
26 {
27 struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
28 mutex_lock(&cx->serialize_lock);
29 }
30
snd_cx18_unlock(struct snd_cx18_card * cxsc)31 static inline void snd_cx18_unlock(struct snd_cx18_card *cxsc)
32 {
33 struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
34 mutex_unlock(&cx->serialize_lock);
35 }
36
37 #define CX18_ALSA_DBGFLG_WARN (1 << 0)
38 #define CX18_ALSA_DBGFLG_INFO (1 << 1)
39
40 #define CX18_ALSA_DEBUG(x, type, fmt, args...) \
41 do { \
42 if ((x) & cx18_alsa_debug) \
43 printk(KERN_INFO "%s-alsa: " type ": " fmt, \
44 v4l2_dev->name , ## args); \
45 } while (0)
46
47 #define CX18_ALSA_DEBUG_WARN(fmt, args...) \
48 CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_WARN, "warning", fmt , ## args)
49
50 #define CX18_ALSA_DEBUG_INFO(fmt, args...) \
51 CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_INFO, "info", fmt , ## args)
52
53 #define CX18_ALSA_ERR(fmt, args...) \
54 printk(KERN_ERR "%s-alsa: " fmt, v4l2_dev->name , ## args)
55
56 #define CX18_ALSA_WARN(fmt, args...) \
57 printk(KERN_WARNING "%s-alsa: " fmt, v4l2_dev->name , ## args)
58
59 #define CX18_ALSA_INFO(fmt, args...) \
60 printk(KERN_INFO "%s-alsa: " fmt, v4l2_dev->name , ## args)
61