LXR linux/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 *  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
  22struct snd_card;
  23
  24struct 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
  33extern 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 */
  39static 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
  45static 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