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(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(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