text: /*
   *  ALSA interface to cx18 PCM capture streams
   *
   *  Copyright (C) 2009  Andy Walls <awalls@md.metrocast.net>
   *
   *  This program is free software; you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation; either version 2 of the License, or
   *  (at your option) any later version.
   *
   *  This program is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *  along with this program; if not, write to the Free Software
   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   *  02111-1307  USA
   */
  
  struct snd_card;
  
  struct snd_cx18_card {
  	struct v4l2_device *v4l2_dev;
  	struct snd_card *sc;
  	unsigned int capture_transfer_done;
  	unsigned int hwptr_done_capture;
  	struct snd_pcm_substream *capture_pcm_substream;
  	spinlock_t slock;
  };
  
  extern int cx18_alsa_debug;
  
  /*
   * File operations that manipulate the encoder or video or audio subdevices
   * need to be serialized.  Use the same lock we use for v4l2 file ops.
   */
  static inline void snd_cx18_lock(struct snd_cx18_card *cxsc)
  {
  	struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
  	mutex_lock(&cx->serialize_lock);
  }
  
  static inline void snd_cx18_unlock(struct snd_cx18_card *cxsc)
  {
  	struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
  	mutex_unlock(&cx->serialize_lock);
  }
  
  #define CX18_ALSA_DBGFLG_WARN  (1 << 0)
  #define CX18_ALSA_DBGFLG_WARN  (1 << 0)
  #define CX18_ALSA_DBGFLG_INFO  (1 << 1)
  
  #define CX18_ALSA_DEBUG(x, type, fmt, args...) \
  	do { \
  		if ((x) & cx18_alsa_debug) \
  			printk(KERN_INFO "%s-alsa: " type ": " fmt, \
  				v4l2_dev->name , ## args); \
  	} while (0)
  
  #define CX18_ALSA_DEBUG_WARN(fmt, args...) \
  	CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_WARN, "warning", fmt , ## args)
  
  #define CX18_ALSA_DEBUG_INFO(fmt, args...) \
  	CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_INFO, "info", fmt , ## args)
  
  #define CX18_ALSA_ERR(fmt, args...) \
  	printk(KERN_ERR "%s-alsa: " fmt, v4l2_dev->name , ## args)
  
  #define CX18_ALSA_WARN(fmt, args...) \
  	printk(KERN_WARNING "%s-alsa: " fmt, v4l2_dev->name , ## args)
  
  #define CX18_ALSA_INFO(fmt, args...) \
  	printk(KERN_INFO "%s-alsa: " fmt, v4l2_dev->name , ## args)
  