From 4ede028f8716523fc31e0d3d01b81405613dfb8f Mon Sep 17 00:00:00 2001 From: Hans-Christian Egtvedt Date: Thu, 5 Feb 2009 13:11:00 +0100 Subject: 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: Hans-Christian Egtvedt Signed-off-by: Takashi Iwai --- include/sound/atmel-ac97c.h | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 include/sound/atmel-ac97c.h (limited to 'include/sound/atmel-ac97c.h') diff --git a/include/sound/atmel-ac97c.h b/include/sound/atmel-ac97c.h new file mode 100644 index 00000000000..e6aabdb4586 --- /dev/null +++ b/include/sound/atmel-ac97c.h @@ -0,0 +1,40 @@ +/* + * 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 + +#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 */ -- cgit v1.2.3