1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  *  ALSA interface to ivtv PCM capture streams
4  *
5  *  Copyright (C) 2009,2012  Andy Walls <awalls@md.metrocast.net>
6  *  Copyright (C) 2009  Devin Heitmueller <dheitmueller@kernellabs.com>
7  */
8 
9 struct snd_card;
10 
11 struct snd_ivtv_card {
12 	struct v4l2_device *v4l2_dev;
13 	struct snd_card *sc;
14 	unsigned int capture_transfer_done;
15 	unsigned int hwptr_done_capture;
16 	struct snd_pcm_substream *capture_pcm_substream;
17 	spinlock_t slock;
18 };
19 
20 extern int ivtv_alsa_debug;
21 
22 /*
23  * File operations that manipulate the encoder or video or audio subdevices
24  * need to be serialized.  Use the same lock we use for v4l2 file ops.
25  */
snd_ivtv_lock(struct snd_ivtv_card * itvsc)26 static inline void snd_ivtv_lock(struct snd_ivtv_card *itvsc)
27 {
28 	struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
29 	mutex_lock(&itv->serialize_lock);
30 }
31 
snd_ivtv_unlock(struct snd_ivtv_card * itvsc)32 static inline void snd_ivtv_unlock(struct snd_ivtv_card *itvsc)
33 {
34 	struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
35 	mutex_unlock(&itv->serialize_lock);
36 }
37 
38 #define IVTV_ALSA_DBGFLG_WARN  (1 << 0)
39 #define IVTV_ALSA_DBGFLG_INFO  (1 << 1)
40 
41 #define IVTV_ALSA_DEBUG(x, type, fmt, args...) \
42 	do { \
43 		if ((x) & ivtv_alsa_debug) \
44 			pr_info("%s-alsa: " type ": " fmt, \
45 				v4l2_dev->name , ## args); \
46 	} while (0)
47 
48 #define IVTV_ALSA_DEBUG_WARN(fmt, args...) \
49 	IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_WARN, "warning", fmt , ## args)
50 
51 #define IVTV_ALSA_DEBUG_INFO(fmt, args...) \
52 	IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_INFO, "info", fmt , ## args)
53 
54 #define IVTV_ALSA_ERR(fmt, args...) \
55 	pr_err("%s-alsa: " fmt, v4l2_dev->name , ## args)
56 
57 #define IVTV_ALSA_WARN(fmt, args...) \
58 	pr_warn("%s-alsa: " fmt, v4l2_dev->name , ## args)
59 
60 #define IVTV_ALSA_INFO(fmt, args...) \
61 	pr_info("%s-alsa: " fmt, v4l2_dev->name , ## args)
62