sound/arm/pxa2xx-pcm.h

   1 /*
   2  * linux/sound/arm/pxa2xx-pcm.h -- ALSA PCM interface for the Intel PXA2xx chip
   3  *
   4  * Author:      Nicolas Pitre
   5  * Created:     Nov 30, 2004
   6  * Copyright:   MontaVista Software, Inc.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 struct pxa2xx_pcm_dma_params {
  14         char *name;                     /* stream identifier */
  15         u32 dcmd;                       /* DMA descriptor dcmd field */
  16         volatile u32 *drcmr;            /* the DMA request channel to use */
  17         u32 dev_addr;                   /* device physical address for DMA */
  18 };
  19
  20 struct pxa2xx_pcm_client {
  21         struct pxa2xx_pcm_dma_params *playback_params;
  22         struct pxa2xx_pcm_dma_params *capture_params;
  23         int (*startup)(struct snd_pcm_substream *);
  24         void (*shutdown)(struct snd_pcm_substream *);
  25         int (*prepare)(struct snd_pcm_substream *);
  26 };
  27
  28 extern int pxa2xx_pcm_new(struct snd_card *, struct pxa2xx_pcm_client *, struct snd_pcm **);
  29