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 17 struct snd_card; 18 19 struct snd_cx18_card { 20 struct v4l2_device *v4l2_dev; 21 struct snd_card *sc; 22 unsigned int capture_transfer_done; 23 unsigned int hwptr_done_capture; 24 struct snd_pcm_substream *capture_pcm_substream; 25 spinlock_t slock; 26 }; 27 28 extern int cx18_alsa_debug; 29 30 /* 31 * File operations that manipulate the encoder or video or audio subdevices 32 * need to be serialized. Use the same lock we use for v4l2 file ops. 33 */ 34 static inline void snd_cx18_lock(struct snd_cx18_card *cxsc) 35 { 36 struct cx18 *cx = to_cx18(cxsc->v4l2_dev); 37 mutex_lock(&cx->serialize_lock); 38 } 39 40 static inline void snd_cx18_unlock(struct snd_cx18_card *cxsc) 41 { 42 struct cx18 *cx = to_cx18(cxsc->v4l2_dev); 43 mutex_unlock(&cx->serialize_lock); 44 } 45 46 #define CX18_ALSA_DBGFLG_WARN (1 << 0) 47 #define CX18_ALSA_DBGFLG_INFO (1 << 1) 48 49 #define CX18_ALSA_DEBUG(x, type, fmt, args...) \ 50 do { \ 51 if ((x) & cx18_alsa_debug) \ 52 printk(KERN_INFO "%s-alsa: " type ": " fmt, \ 53 v4l2_dev->name , ## args); \ 54 } while (0) 55 56 #define CX18_ALSA_DEBUG_WARN(fmt, args...) \ 57 CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_WARN, "warning", fmt , ## args) 58 59 #define CX18_ALSA_DEBUG_INFO(fmt, args...) \ 60 CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_INFO, "info", fmt , ## args) 61 62 #define CX18_ALSA_ERR(fmt, args...) \ 63 printk(KERN_ERR "%s-alsa: " fmt, v4l2_dev->name , ## args) 64 65 #define CX18_ALSA_WARN(fmt, args...) \ 66 printk(KERN_WARNING "%s-alsa: " fmt, v4l2_dev->name , ## args) 67 68 #define CX18_ALSA_INFO(fmt, args...) \ 69 printk(KERN_INFO "%s-alsa: " fmt, v4l2_dev->name , ## args) 70