sound/soc/at32/at32-ssc.h

   1 /* sound/soc/at32/at32-ssc.h
   2  * ASoC SSC interface for Atmel AT32 SoC
   3  *
   4  * Copyright (C) 2008 Long Range Systems
   5  *    Geoffrey Wossum <gwossum@acm.org>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #ifndef __SOUND_SOC_AT32_AT32_SSC_H
  13 #define __SOUND_SOC_AT32_AT32_SSC_H __FILE__
  14
  15 #include <linux/types.h>
  16 #include <linux/atmel-ssc.h>
  17
  18 #include "at32-pcm.h"
  19
  20
  21
  22 struct at32_ssc_state {
  23         u32 ssc_cmr;
  24         u32 ssc_rcmr;
  25         u32 ssc_rfmr;
  26         u32 ssc_tcmr;
  27         u32 ssc_tfmr;
  28         u32 ssc_sr;
  29         u32 ssc_imr;
  30 };
  31
  32
  33
  34 struct at32_ssc_info {
  35         char *name;
  36         struct ssc_device *ssc;
  37         spinlock_t lock;        /* lock for dir_mask */
  38         unsigned short dir_mask;        /* 0=unused, 1=playback, 2=capture */
  39         unsigned short initialized;     /* true if SSC has been initialized */
  40         unsigned short daifmt;
  41         unsigned short cmr_div;
  42         unsigned short tcmr_period;
  43         unsigned short rcmr_period;
  44         struct at32_pcm_dma_params *dma_params[2];
  45         struct at32_ssc_state ssc_state;
  46 };
  47
  48
  49 /* SSC divider ids */
  50 #define AT32_SSC_CMR_DIV        0       /* MCK divider for BCLK */
  51 #define AT32_SSC_TCMR_PERIOD    1       /* BCLK divider for transmit FS */
  52 #define AT32_SSC_RCMR_PERIOD    2       /* BCLK divider for receive FS */
  53
  54
  55 extern struct snd_soc_dai at32_ssc_dai[];
  56
  57
  58
  59 #endif /* __SOUND_SOC_AT32_AT32_SSC_H */