ASoC: Add driver for s6000 I2S interface

This patch adds a driver for the I2S interface found on Stretch s6000
family processors.
Signed-off-by: Daniel Glöckner <dg@emlix.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/Kconfig

@@ -32,6 +32,7 @@ source "sound/soc/fsl/Kconfig"
 source "sound/soc/omap/Kconfig"
 source "sound/soc/pxa/Kconfig"
 source "sound/soc/s3c24xx/Kconfig"
+source "sound/soc/s6000/Kconfig"
 source "sound/soc/sh/Kconfig"
 
 # Supported codecs

sound/soc/Makefile

@@ -10,4 +10,5 @@ obj-$(CONFIG_SND_SOC)	+= fsl/
 obj-$(CONFIG_SND_SOC)	+= omap/
 obj-$(CONFIG_SND_SOC)	+= pxa/
 obj-$(CONFIG_SND_SOC)	+= s3c24xx/
+obj-$(CONFIG_SND_SOC)	+= s6000/
 obj-$(CONFIG_SND_SOC)	+= sh/

sound/soc/s6000/Kconfig

+config SND_S6000_SOC
+	tristate "SoC Audio for the Stretch s6000 family"
+	depends on XTENSA_VARIANT_S6000
+	help
+	  Say Y or M if you want to add support for codecs attached to
+	  s6000 family chips. You will also need to select the platform
+	  to support below.
+
+config SND_S6000_SOC_I2S
+	tristate

sound/soc/s6000/Makefile

+# s6000 Platform Support
+snd-soc-s6000-objs := s6000-pcm.o
+snd-soc-s6000-i2s-objs := s6000-i2s.o
+
+obj-$(CONFIG_SND_S6000_SOC) += snd-soc-s6000.o
+obj-$(CONFIG_SND_S6000_SOC_I2S) += snd-soc-s6000-i2s.o

sound/soc/s6000/s6000-i2s.h

+/*
+ * ALSA SoC I2S Audio Layer for the Stretch s6000 family
+ *
+ * Author:      Daniel Gloeckner, <dg@emlix.com>
+ * Copyright:   (C) 2009 emlix GmbH <info@emlix.com>
+ *
+ * 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 _S6000_I2S_H
+#define _S6000_I2S_H
+
+extern struct snd_soc_dai s6000_i2s_dai;
+
+struct s6000_snd_platform_data {
+	int lines_in;
+	int lines_out;
+	int channel_in;
+	int channel_out;
+	int wide;
+	int same_rate;
+};
+#endif

sound/soc/s6000/s6000-pcm.h

+/*
+ * ALSA PCM interface for the Stretch s6000 family
+ *
+ * Author:      Daniel Gloeckner, <dg@emlix.com>
+ * Copyright:   (C) 2009 emlix GmbH <info@emlix.com>
+ *
+ * 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 _S6000_PCM_H
+#define _S6000_PCM_H
+
+struct snd_soc_dai;
+struct snd_pcm_substream;
+
+struct s6000_pcm_dma_params {
+	unsigned int (*check_xrun)(struct snd_soc_dai *cpu_dai);
+	int (*trigger)(struct snd_pcm_substream *substream, int cmd, int after);
+	dma_addr_t sif_in;
+	dma_addr_t sif_out;
+	u32 dma_in;
+	u32 dma_out;
+	int irq;
+	int same_rate;
+
+	spinlock_t lock;
+	int in_use;
+	int rate;
+};
+
+extern struct snd_soc_platform s6000_soc_platform;
+
+#endif