release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/media/video/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  *  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_WARN  (1 << 0)
  53 #define CX18_ALSA_DBGFLG_INFO  (1 << 1)
  54
  55 #define CX18_ALSA_DEBUG(x, type, fmt, args...) \
  56         do { \
  57                 if ((x) & cx18_alsa_debug) \
  58                         printk(KERN_INFO "%s-alsa: " type ": " fmt, \
  59                                 v4l2_dev->name , ## args); \
  60         } while (0)
  61
  62 #define CX18_ALSA_DEBUG_WARN(fmt, args...) \
  63         CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_WARN, "warning", fmt , ## args)
  64
  65 #define CX18_ALSA_DEBUG_INFO(fmt, args...) \
  66         CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_INFO, "info", fmt , ## args)
  67
  68 #define CX18_ALSA_ERR(fmt, args...) \
  69         printk(KERN_ERR "%s-alsa: " fmt, v4l2_dev->name , ## args)
  70
  71 #define CX18_ALSA_WARN(fmt, args...) \
  72         printk(KERN_WARNING "%s-alsa: " fmt, v4l2_dev->name , ## args)
  73
  74 #define CX18_ALSA_INFO(fmt, args...) \
  75         printk(KERN_INFO "%s-alsa: " fmt, v4l2_dev->name , ## args)