Permalink
Browse files

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 <hans-christian.egtvedt@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
  • Loading branch information...
1 parent e4967d6 commit 4ede028f8716523fc31e0d3d01b81405613dfb8f Hans-Christian Egtvedt committed with tiwai Feb 5, 2009
Showing with 1,053 additions and 0 deletions.
  1. +40 −0 include/sound/atmel-ac97c.h
  2. +8 −0 sound/atmel/Kconfig
  3. +2 −0 sound/atmel/Makefile
  4. +932 −0 sound/atmel/ac97c.c
  5. +71 −0 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 <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 */
View
@@ -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
View
@@ -1,3 +1,5 @@
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
Oops, something went wrong.

0 comments on commit 4ede028

Please sign in to comment.