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Commit 4ede028f authored by Hans-Christian Egtvedt's avatar Hans-Christian Egtvedt Committed by Takashi Iwai
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ALSA: Add ALSA driver for Atmel AC97 controller 



This patch adds ALSA support for the AC97 controller found on Atmel
AVR32 devices.

Tested on ATSTK1006 + ATSTK1000 with a development board with a AC97
codec.

Signed-off-by: default avatarHans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent e4967d60

include/sound/atmel-ac97c.h

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/*

 * Driver for the Atmel AC97C controller

 *

 * Copyright (C) 2005-2009 Atmel Corporation

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 as published

 * by the Free Software Foundation.

 */

#ifndef __INCLUDE_SOUND_ATMEL_AC97C_H

#define __INCLUDE_SOUND_ATMEL_AC97C_H



#include <linux/dw_dmac.h>



#define AC97C_CAPTURE	0x01

#define AC97C_PLAYBACK	0x02

#define AC97C_BOTH	(AC97C_CAPTURE | AC97C_PLAYBACK)



/**

 * struct atmel_ac97c_pdata - board specific AC97C configuration

 * @rx_dws: DMA slave interface to use for sound capture.

 * @tx_dws: DMA slave interface to use for sound playback.

 * @reset_pin: GPIO pin wired to the reset input on the external AC97 codec,

 *             optional to use, set to -ENODEV if not in use. AC97 layer will

 *             try to do a software reset of the external codec anyway.

 * @flags: Flags for which directions should be enabled.

 *

 * If the user do not want to use a DMA channel for playback or capture, i.e.

 * only one feature is required on the board. The slave for playback or capture

 * can be set to NULL. The AC97C driver will take use of this when setting up

 * the sound streams.

 */

struct ac97c_platform_data {

	struct dw_dma_slave	rx_dws;

	struct dw_dma_slave	tx_dws;

	unsigned int 		flags;

	int			reset_pin;

};



#endif /* __INCLUDE_SOUND_ATMEL_AC97C_H */

sound/atmel/Kconfig

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@@ -8,4 +8,12 @@ config SND_ATMEL_ABDAC 
	help

	  ALSA sound driver for the Atmel Audio Bitstream DAC (ABDAC).



config SND_ATMEL_AC97C

	tristate "Atmel AC97 Controller (AC97C) driver"

	select SND_PCM

	select SND_AC97_CODEC

	depends on DW_DMAC && AVR32

	help

	  ALSA sound driver for the Atmel AC97 controller.



endmenu

sound/atmel/Makefile

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snd-atmel-abdac-objs		:= abdac.o

snd-atmel-ac97c-objs		:= ac97c.o



obj-$(CONFIG_SND_ATMEL_ABDAC)	+= snd-atmel-abdac.o

obj-$(CONFIG_SND_ATMEL_AC97C)	+= snd-atmel-ac97c.o