sound/pci/hda/hda_controller.h

   1 /*
   2  *  Common functionality for the alsa driver code base for HD Audio.
   3  *
   4  *  This program is free software; you can redistribute it and/or modify it
   5  *  under the terms of the GNU General Public License as published by the Free
   6  *  Software Foundation; either version 2 of the License, or (at your option)
   7  *  any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful, but WITHOUT
  10  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  *  more details.
  13  */
  14
  15 #ifndef __SOUND_HDA_CONTROLLER_H
  16 #define __SOUND_HDA_CONTROLLER_H
  17
  18 #include <sound/core.h>
  19 #include <sound/initval.h>
  20 #include "hda_codec.h"
  21 #include "hda_priv.h"
  22
  23 /* PCM setup */
  24 int azx_attach_pcm_stream(struct hda_bus *bus, struct hda_codec *codec,
  25                           struct hda_pcm *cpcm);
  26 static inline struct azx_dev *get_azx_dev(struct snd_pcm_substream *substream)
  27 {
  28         return substream->runtime->private_data;
  29 }
  30 unsigned int azx_get_position(struct azx *chip,
  31                               struct azx_dev *azx_dev,
  32                               bool with_check);
  33
  34 /* Stream control. */
  35 void azx_stream_start(struct azx *chip, struct azx_dev *azx_dev);
  36 void azx_stream_stop(struct azx *chip, struct azx_dev *azx_dev);
  37 void azx_stream_reset(struct azx *chip, struct azx_dev *azx_dev);
  38 int azx_setup_controller(struct azx *chip, struct azx_dev *azx_dev);
  39 int setup_bdle(struct azx *chip,
  40                struct snd_dma_buffer *dmab,
  41                struct azx_dev *azx_dev, u32 **bdlp,
  42                int ofs, int size, int with_ioc);
  43
  44 /* DSP lock helpers */
  45 #ifdef CONFIG_SND_HDA_DSP_LOADER
  46 #define dsp_lock_init(dev)      mutex_init(&(dev)->dsp_mutex)
  47 #define dsp_lock(dev)           mutex_lock(&(dev)->dsp_mutex)
  48 #define dsp_unlock(dev)         mutex_unlock(&(dev)->dsp_mutex)
  49 #define dsp_is_locked(dev)      ((dev)->locked)
  50 #else
  51 #define dsp_lock_init(dev)      do {} while (0)
  52 #define dsp_lock(dev)           do {} while (0)
  53 #define dsp_unlock(dev)         do {} while (0)
  54 #define dsp_is_locked(dev)      0
  55 #endif
  56
  57 /* Allocation functions. */
  58 int azx_alloc_stream_pages(struct azx *chip);
  59 void azx_free_stream_pages(struct azx *chip);
  60
  61 #endif /* __SOUND_HDA_CONTROLLER_H */