1 /* 2 * ALSA interface to ivtv PCM capture streams 3 * 4 * Copyright (C) 2009,2012 Andy Walls <awalls@md.metrocast.net> 5 * Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 20 * 02111-1307 USA 21 */ 22 23 struct snd_card; 24 25 struct snd_ivtv_card { 26 struct v4l2_device *v4l2_dev; 27 struct snd_card *sc; 28 unsigned int capture_transfer_done; 29 unsigned int hwptr_done_capture; 30 struct snd_pcm_substream *capture_pcm_substream; 31 spinlock_t slock; 32 }; 33 34 extern int ivtv_alsa_debug; 35 36 /* 37 * File operations that manipulate the encoder or video or audio subdevices 38 * need to be serialized. Use the same lock we use for v4l2 file ops. 39 */ 40 static inline void snd_ivtv_lock(struct snd_ivtv_card *itvsc) 41 { 42 struct ivtv *itv = to_ivtv(itvsc->v4l2_dev); 43 mutex_lock(&itv->serialize_lock); 44 } 45 46 static inline void snd_ivtv_unlock(struct snd_ivtv_card *itvsc) 47 { 48 struct ivtv *itv = to_ivtv(itvsc->v4l2_dev); 49 mutex_unlock(&itv->serialize_lock); 50 } 51 52 #define IVTV_ALSA_DBGFLG_WARN (1 << 0) 53 #define IVTV_ALSA_DBGFLG_INFO (1 << 1) 54 55 #define IVTV_ALSA_DEBUG(x, type, fmt, args...) \ 56 do { \ 57 if ((x) & ivtv_alsa_debug) \ 58 pr_info("%s-alsa: " type ": " fmt, \ 59 v4l2_dev->name , ## args); \ 60 } while (0) 61 62 #define IVTV_ALSA_DEBUG_WARN(fmt, args...) \ 63 IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_WARN, "warning", fmt , ## args) 64 65 #define IVTV_ALSA_DEBUG_INFO(fmt, args...) \ 66 IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_INFO, "info", fmt , ## args) 67 68 #define IVTV_ALSA_ERR(fmt, args...) \ 69 pr_err("%s-alsa: " fmt, v4l2_dev->name , ## args) 70 71 #define IVTV_ALSA_WARN(fmt, args...) \ 72 pr_warn("%s-alsa: " fmt, v4l2_dev->name , ## args) 73 74 #define IVTV_ALSA_INFO(fmt, args...) \ 75 pr_info("%s-alsa: " fmt, v4l2_dev->name , ## args) 76