drivers/media/pci/cx18/cx18-alsa.h

   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)