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 | */ |
25 | static inline void snd_cx18_lock(struct snd_cx18_card *cxsc) |
26 | { |
27 | struct cx18 *cx = to_cx18(v4l2_dev: cxsc->v4l2_dev); |
28 | mutex_lock(&cx->serialize_lock); |
29 | } |
30 | |
31 | static inline void snd_cx18_unlock(struct snd_cx18_card *cxsc) |
32 | { |
33 | struct cx18 *cx = to_cx18(v4l2_dev: cxsc->v4l2_dev); |
34 | mutex_unlock(lock: &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 | |