ALSA: Add ALSA driver for Atmel AC97 controller

/*

 * 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 */

	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

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

/*

 * Register definitions 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 __SOUND_ATMEL_AC97C_H

#define __SOUND_ATMEL_AC97C_H

#define AC97C_MR		0x08

#define AC97C_ICA		0x10

#define AC97C_OCA		0x14

#define AC97C_CARHR		0x20

#define AC97C_CATHR		0x24

#define AC97C_CASR		0x28

#define AC97C_CAMR		0x2c

#define AC97C_CBRHR		0x30

#define AC97C_CBTHR		0x34

#define AC97C_CBSR		0x38

#define AC97C_CBMR		0x3c

#define AC97C_CORHR		0x40

#define AC97C_COTHR		0x44

#define AC97C_COSR		0x48

#define AC97C_COMR		0x4c

#define AC97C_SR		0x50

#define AC97C_IER		0x54

#define AC97C_IDR		0x58

#define AC97C_IMR		0x5c

#define AC97C_VERSION		0xfc

#define AC97C_CATPR		PDC_TPR

#define AC97C_CATCR		PDC_TCR

#define AC97C_CATNPR		PDC_TNPR

#define AC97C_CATNCR		PDC_TNCR

#define AC97C_CARPR		PDC_RPR

#define AC97C_CARCR		PDC_RCR

#define AC97C_CARNPR		PDC_RNPR

#define AC97C_CARNCR		PDC_RNCR

#define AC97C_PTCR		PDC_PTCR

#define AC97C_MR_ENA		(1 << 0)

#define AC97C_MR_WRST		(1 << 1)

#define AC97C_MR_VRA		(1 << 2)

#define AC97C_CSR_TXRDY		(1 << 0)

#define AC97C_CSR_UNRUN		(1 << 2)

#define AC97C_CSR_RXRDY		(1 << 4)

#define AC97C_CSR_ENDTX		(1 << 10)

#define AC97C_CSR_ENDRX		(1 << 14)

#define AC97C_CMR_SIZE_20	(0 << 16)

#define AC97C_CMR_SIZE_18	(1 << 16)

#define AC97C_CMR_SIZE_16	(2 << 16)

#define AC97C_CMR_SIZE_10	(3 << 16)

#define AC97C_CMR_CEM_LITTLE	(1 << 18)

#define AC97C_CMR_CEM_BIG	(0 << 18)

#define AC97C_CMR_CENA		(1 << 21)

#define AC97C_CMR_DMAEN		(1 << 22)

#define AC97C_SR_CAEVT		(1 << 3)

#define AC97C_CH_ASSIGN(slot, channel)					\

	(AC97C_CHANNEL_##channel << (3 * (AC97_SLOT_##slot - 3)))

#define AC97C_CHANNEL_NONE	0x0

#define AC97C_CHANNEL_A		0x1

#define AC97C_CHANNEL_B		0x2

#endif /* __SOUND_ATMEL_AC97C_H */