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

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 *  ALSA interface to cx18 PCM capture streams
   4 *
   5 *  Copyright (C) 2009  Andy Walls <awalls@md.metrocast.net>
   6 */
   7
   8struct snd_card;
   9
  10struct snd_cx18_card {
  11        struct v4l2_device *v4l2_dev;
  12        struct snd_card *sc;
  13        unsigned int capture_transfer_done;
  14        unsigned int hwptr_done_capture;
  15        struct snd_pcm_substream *capture_pcm_substream;
  16        spinlock_t slock;
  17};
  18
  19extern int cx18_alsa_debug;
  20
  21/*
  22 * File operations that manipulate the encoder or video or audio subdevices
  23 * need to be serialized.  Use the same lock we use for v4l2 file ops.
  24 */
  25static inline void snd_cx18_lock(struct snd_cx18_card *cxsc)
  26{
  27        struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
  28        mutex_lock(&cx->serialize_lock);
  29}
  30
  31static inline void snd_cx18_unlock(struct snd_cx18_card *cxsc)
  32{
  33        struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
  34        mutex_unlock(&cx->serialize_lock);
  35}
  36
  37#define CX18_ALSA_DBGFLG_WARN  (1 << 0)
  38#define CX18_ALSA_DBGFLG_INFO  (1 << 1)
  39
  40#define CX18_ALSA_DEBUG(x, type, fmt, args...) \
  41        do { \
  42                if ((x) & cx18_alsa_debug) \
  43                        printk(KERN_INFO "%s-alsa: " type ": " fmt, \
  44                                v4l2_dev->name , ## args); \
  45        } while (0)
  46
  47#define CX18_ALSA_DEBUG_WARN(fmt, args...) \
  48        CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_WARN, "warning", fmt , ## args)
  49
  50#define CX18_ALSA_DEBUG_INFO(fmt, args...) \
  51        CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_INFO, "info", fmt , ## args)
  52
  53#define CX18_ALSA_ERR(fmt, args...) \
  54        printk(KERN_ERR "%s-alsa: " fmt, v4l2_dev->name , ## args)
  55
  56#define CX18_ALSA_WARN(fmt, args...) \
  57        printk(KERN_WARNING "%s-alsa: " fmt, v4l2_dev->name , ## args)
  58
  59#define CX18_ALSA_INFO(fmt, args...) \
  60        printk(KERN_INFO "%s-alsa: " fmt, v4l2_dev->name , ## args)
  61