sound/arm/pxa2xx-i2sound.h

   1 /*
   2  * PXA2xx i2Sound: support for Intel PXA2xx I2S audio
   3  *
   4  * Copyright (c) 2005 Giorgio Padrin <giorgio@mandarinlogiq.org>
   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 version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * History:
  11  *
  12  * 2005-03      Giorgio Padrin          Initial release
  13  * 2005-05-02   Giorgio Padrin          added event() to board plugins interface
  14  * 2005-05-14   Giorgio Padrin          Splitted event()
  15  */
  16
  17 #ifndef __SOUND_PXA2xx_I2SOUND_H
  18 #define __SOUND_PXA2xx_I2SOUND_H
  19
  20 #include <sound/driver.h>
  21 #include <sound/core.h>
  22 #include <sound/pcm.h>
  23 #include <sound/initval.h>
  24
  25 struct snd_pxa2xx_i2sound_board_stream_hw {
  26         unsigned int rates;             /* SNDRV_PCM_RATE_* */
  27         unsigned int rate_min;          /* min rate */
  28         unsigned int rate_max;          /* max rate */
  29         unsigned int *rates_table;      /* in case the field rates is not enough */
  30         unsigned int rates_num;         /* size of rates_table */
  31 };
  32
  33 struct snd_pxa2xx_i2sound_board {
  34         char *name;
  35         char *desc;     /* short description */
  36         char *acard_id; /* ALSA card id */
  37
  38         unsigned int info;
  39
  40         struct snd_pxa2xx_i2sound_board_stream_hw streams_hw[2];
  41
  42         int (*activate)(void);
  43         void (*deactivate)(void);
  44
  45         int (*set_rate)(unsigned int rate);
  46
  47         int (*open_stream)(int stream);
  48         void (*close_stream)(int stream);
  49
  50         /* ALSA mixer */
  51         int (*add_mixer_controls)(struct snd_card *acard);
  52
  53         /* tune ALSA hw params space at substream opening */
  54         int (*add_hw_constraints)(struct snd_pcm_substream *asubs);
  55
  56 #ifdef CONFIG_PM
  57         /* Power Management */
  58         int (*suspend) (pm_message_t state);
  59         int (*resume) (void);
  60 #endif
  61 };
  62
  63 #define SND_PXA2xx_I2SOUND_INFO_CLOCK_FROM_PXA  1 << 0
  64 #define SND_PXA2xx_I2SOUND_INFO_CAN_CAPTURE     1 << 1
  65 #define SND_PXA2xx_I2SOUND_INFO_HALF_DUPLEX     1 << 2
  66
  67 void snd_pxa2xx_i2sound_i2slink_get(void);
  68 void snd_pxa2xx_i2sound_i2slink_free(void);
  69
  70 int snd_pxa2xx_i2sound_card_activate(struct snd_pxa2xx_i2sound_board *board);
  71 void snd_pxa2xx_i2sound_card_deactivate(void);
  72
  73 #endif /* __SOUND_PXA2xx_I2SOUND_H */