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 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 19 * 02111-1307 USA 20 */ 21 22 struct snd_card; 23 24 struct snd_cx18_card { 25 struct v4l2_device *v4l2_dev; 26 struct snd_card *sc; 27 unsigned int capture_transfer_done; 28 unsigned int hwptr_done_capture; 29 struct snd_pcm_substream *capture_pcm_substream; 30 spinlock_t slock; 31 }; 32 33 extern int cx18_alsa_debug; 34 35 /* 36 * File operations that manipulate the encoder or video or audio subdevices 37 * need to be serialized. Use the same lock we use for v4l2 file ops. 38 */ 39 static inline void snd_cx18_lock(struct snd_cx18_card *cxsc) 40 { 41 struct cx18 *cx = to_cx18(cxsc->v4l2_dev); 42 mutex_lock(&cx->serialize_lock); 43 } 44 45 static inline void snd_cx18_unlock(struct snd_cx18_card *cxsc) 46 { 47 struct cx18 *cx = to_cx18(cxsc->v4l2_dev); 48 mutex_unlock(&cx->serialize_lock); 49 } 50 51 #define CX18_ALSA_DBGFLG_WARN (1 << 0) 52 #define CX18_ALSA_DBGFLG_INFO (1 << 1) 53 54 #define CX18_ALSA_DEBUG(x, type, fmt, args...) \ 55 do { \ 56 if ((x) & cx18_alsa_debug) \ 57 printk(KERN_INFO "%s-alsa: " type ": " fmt, \ 58 v4l2_dev->name , ## args); \ 59 } while (0) 60 61 #define CX18_ALSA_DEBUG_WARN(fmt, args...) \ 62 CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_WARN, "warning", fmt , ## args) 63 64 #define CX18_ALSA_DEBUG_INFO(fmt, args...) \ 65 CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_INFO, "info", fmt , ## args) 66 67 #define CX18_ALSA_ERR(fmt, args...) \ 68 printk(KERN_ERR "%s-alsa: " fmt, v4l2_dev->name , ## args) 69 70 #define CX18_ALSA_WARN(fmt, args...) \ 71 printk(KERN_WARNING "%s-alsa: " fmt, v4l2_dev->name , ## args) 72 73 #define CX18_ALSA_INFO(fmt, args...) \ 74 printk(KERN_INFO "%s-alsa: " fmt, v4l2_dev->name , ## args) 75