linux/include/sound/atmel-ac97c.h
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   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/dw_dmac.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 * @flags: Flags for which directions should be enabled.
  27 *
  28 * If the user do not want to use a DMA channel for playback or capture, i.e.
  29 * only one feature is required on the board. The slave for playback or capture
  30 * can be set to NULL. The AC97C driver will take use of this when setting up
  31 * the sound streams.
  32 */
  33struct ac97c_platform_data {
  34        struct dw_dma_slave     rx_dws;
  35        struct dw_dma_slave     tx_dws;
  36        unsigned int            flags;
  37        int                     reset_pin;
  38};
  39
  40#endif /* __INCLUDE_SOUND_ATMEL_AC97C_H */
  41
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