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authorHans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>2009-02-05 13:11:00 +0100
committerTakashi Iwai <tiwai@suse.de>2009-02-05 15:08:51 +0100
commit4ede028f8716523fc31e0d3d01b81405613dfb8f (patch)
treebd8e9ebd0396e1e687f8bd5bd8b2b53f89a53ea1 /include/sound
parente4967d6016b7785edafdb871e6d3e4426cb4bd1f (diff)
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>
Diffstat (limited to 'include/sound')
-rw-r--r--include/sound/atmel-ac97c.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/include/sound/atmel-ac97c.h b/include/sound/atmel-ac97c.h
new file mode 100644
index 000000000000..e6aabdb45865
--- /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 <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 */