include/sound/atmel-ac97c.h

   1 /*
   2  * Driver for the Atmel AC97C controller
   3  *
   4  * Copyright (C) 2005-2009 Atmel Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published
   8  * by the Free Software Foundation.
   9  */
  10 #ifndef __INCLUDE_SOUND_ATMEL_AC97C_H
  11 #define __INCLUDE_SOUND_ATMEL_AC97C_H
  12
  13 #include <linux/platform_data/dma-dw.h>
  14
  15 #define AC97C_CAPTURE   0x01
  16 #define AC97C_PLAYBACK  0x02
  17 #define AC97C_BOTH      (AC97C_CAPTURE | AC97C_PLAYBACK)
  18
  19 /**
  20  * struct atmel_ac97c_pdata - board specific AC97C configuration
  21  * @rx_dws: DMA slave interface to use for sound capture.
  22  * @tx_dws: DMA slave interface to use for sound playback.
  23  * @reset_pin: GPIO pin wired to the reset input on the external AC97 codec,
  24  *             optional to use, set to -ENODEV if not in use. AC97 layer will
  25  *             try to do a software reset of the external codec anyway.
  26  *
  27  * If the user do not want to use a DMA channel for playback or capture, i.e.
  28  * only one feature is required on the board. The slave for playback or capture
  29  * can be set to NULL. The AC97C driver will take use of this when setting up
  30  * the sound streams.
  31  */
  32 struct ac97c_platform_data {
  33         struct dw_dma_slave     rx_dws;
  34         struct dw_dma_slave     tx_dws;
  35         int                     reset_pin;
  36 };
  37
  38 #endif /* __INCLUDE_SOUND_ATMEL_AC97C_H */