[ALSA] ASoC pxa2xx DMA support

This patch adds pxa2xx ASoC DMA audio support. It's based on
sound/arm/pxa-pcm.c by Nicolas Pitre with the following differences.
o Modified driver structure to use ASoC core PCM callbacks and data
structures.
o Registration with ASoC core.
From: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 48 insertions, 0 deletions

diff --git a/sound/soc/pxa/pxa2xx-pcm.h b/sound/soc/pxa/pxa2xx-pcm.h
new file mode 100644
index 000000000000..0b55f070da27
--- /dev/null
+++ b/sound/soc/pxa/pxa2xx-pcm.h
@@ -0,0 +1,48 @@
+/*
+ * linux/sound/arm/pxa2xx-pcm.h -- ALSA PCM interface for the Intel PXA2xx chip
+ *
+ * Author:      Nicolas Pitre
+ * Created:     Nov 30, 2004
+ * Copyright:   MontaVista Software, Inc.
+ *
+ * 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 _PXA2XX_PCM_H
+#define _PXA2XX_PCM_H
+
+struct pxa2xx_pcm_dma_params {
+        char *name;                     /* stream identifier */
+        u32 dcmd;                       /* DMA descriptor dcmd field */
+        volatile u32 *drcmr;            /* the DMA request channel to use */
+        u32 dev_addr;                   /* device physical address for DMA */
+};
+
+struct pxa2xx_gpio {
+        u32 sys;
+        u32     rx;
+        u32 tx;
+        u32 clk;
+        u32 frm;
+};
+
+/* pxa2xx DAI ID's */
+#define PXA2XX_DAI_AC97_HIFI    0
+#define PXA2XX_DAI_AC97_AUX             1
+#define PXA2XX_DAI_AC97_MIC             2
+#define PXA2XX_DAI_I2S                  0
+#define PXA2XX_DAI_SSP1                 0
+#define PXA2XX_DAI_SSP2                 1
+#define PXA2XX_DAI_SSP3                 2
+
+extern struct snd_soc_cpu_dai pxa_ac97_dai[3];
+extern struct snd_soc_cpu_dai pxa_i2s_dai;
+extern struct snd_soc_cpu_dai pxa_ssp_dai[3];
+
+/* platform data */
+extern struct snd_soc_platform pxa2xx_soc_platform;
+extern struct snd_ac97_bus_ops pxa2xx_ac97_ops;
+
+#endif