sound/soc/fsl/imx-pcm.h

   1 /*
   2  * Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de>
   3  *
   4  * This code is based on code copyrighted by Freescale,
   5  * Liam Girdwood, Javier Martin and probably others.
   6  *
   7  * This program is free software; you can redistribute  it and/or modify it
   8  * under  the terms of  the GNU General  Public License as published by the
   9  * Free Software Foundation;  either version 2 of the  License, or (at your
  10  * option) any later version.
  11  */
  12
  13 #ifndef _IMX_PCM_H
  14 #define _IMX_PCM_H
  15
  16 #include <linux/platform_data/dma-imx.h>
  17
  18 /*
  19  * Do not change this as the FIQ handler depends on this size
  20  */
  21 #define IMX_SSI_DMABUF_SIZE     (64 * 1024)
  22
  23 static inline void
  24 imx_pcm_dma_params_init_data(struct imx_dma_data *dma_data,
  25         int dma, enum sdma_peripheral_type peripheral_type)
  26 {
  27         dma_data->dma_request = dma;
  28         dma_data->priority = DMA_PRIO_HIGH;
  29         dma_data->peripheral_type = peripheral_type;
  30 }
  31
  32 struct imx_pcm_fiq_params {
  33         int irq;
  34         void __iomem *base;
  35
  36         /* Pointer to original ssi driver to setup tx rx sizes */
  37         struct snd_dmaengine_dai_dma_data *dma_params_rx;
  38         struct snd_dmaengine_dai_dma_data *dma_params_tx;
  39 };
  40
  41 #ifdef CONFIG_SND_SOC_IMX_PCM_DMA
  42 int imx_pcm_dma_init(struct platform_device *pdev);
  43 void imx_pcm_dma_exit(struct platform_device *pdev);
  44 #else
  45 static inline int imx_pcm_dma_init(struct platform_device *pdev)
  46 {
  47         return -ENODEV;
  48 }
  49
  50 static inline void imx_pcm_dma_exit(struct platform_device *pdev)
  51 {
  52 }
  53 #endif
  54
  55 #ifdef CONFIG_SND_SOC_IMX_PCM_FIQ
  56 int imx_pcm_fiq_init(struct platform_device *pdev,
  57                 struct imx_pcm_fiq_params *params);
  58 void imx_pcm_fiq_exit(struct platform_device *pdev);
  59 #else
  60 static inline int imx_pcm_fiq_init(struct platform_device *pdev,
  61                 struct imx_pcm_fiq_params *params)
  62 {
  63         return -ENODEV;
  64 }
  65
  66 static inline void imx_pcm_fiq_exit(struct platform_device *pdev)
  67 {
  68 }
  69 #endif
  70
  71 #endif /* _IMX_PCM_H */