sound/soc/au1x/psc.h

   1 /*
   2  * Au12x0/Au1550 PSC ALSA ASoC audio support.
   3  *
   4  * (c) 2007-2008 MSC Vertriebsges.m.b.H.,
   5  *      Manuel Lauss <manuel.lauss@gmail.com>
   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  * NOTE: all of these drivers can only work with a SINGLE instance
  12  *       of a PSC. Multiple independent audio devices are impossible
  13  *       with ASoC v1.
  14  */
  15
  16 #ifndef _AU1X_PCM_H
  17 #define _AU1X_PCM_H
  18
  19 extern struct snd_ac97_bus_ops soc_ac97_ops;
  20
  21 /* DBDMA helpers */
  22 extern struct platform_device *au1xpsc_pcm_add(struct platform_device *pdev);
  23 extern void au1xpsc_pcm_destroy(struct platform_device *dmapd);
  24
  25 struct au1xpsc_audio_data {
  26         void __iomem *mmio;
  27
  28         unsigned long cfg;
  29         unsigned long rate;
  30
  31         unsigned long pm[2];
  32         struct mutex lock;
  33         struct platform_device *dmapd;
  34 };
  35
  36 #define PCM_TX  0
  37 #define PCM_RX  1
  38
  39 #define SUBSTREAM_TYPE(substream) \
  40         ((substream)->stream == SNDRV_PCM_STREAM_PLAYBACK ? PCM_TX : PCM_RX)
  41
  42 /* easy access macros */
  43 #define PSC_CTRL(x)     ((unsigned long)((x)->mmio) + PSC_CTRL_OFFSET)
  44 #define PSC_SEL(x)      ((unsigned long)((x)->mmio) + PSC_SEL_OFFSET)
  45 #define I2S_STAT(x)     ((unsigned long)((x)->mmio) + PSC_I2SSTAT_OFFSET)
  46 #define I2S_CFG(x)      ((unsigned long)((x)->mmio) + PSC_I2SCFG_OFFSET)
  47 #define I2S_PCR(x)      ((unsigned long)((x)->mmio) + PSC_I2SPCR_OFFSET)
  48 #define AC97_CFG(x)     ((unsigned long)((x)->mmio) + PSC_AC97CFG_OFFSET)
  49 #define AC97_CDC(x)     ((unsigned long)((x)->mmio) + PSC_AC97CDC_OFFSET)
  50 #define AC97_EVNT(x)    ((unsigned long)((x)->mmio) + PSC_AC97EVNT_OFFSET)
  51 #define AC97_PCR(x)     ((unsigned long)((x)->mmio) + PSC_AC97PCR_OFFSET)
  52 #define AC97_RST(x)     ((unsigned long)((x)->mmio) + PSC_AC97RST_OFFSET)
  53 #define AC97_STAT(x)    ((unsigned long)((x)->mmio) + PSC_AC97STAT_OFFSET)
  54
  55 #endif