1 files changed, 75 insertions, 0 deletions

diff --git a/sound/soc/at91/at91rm9200-pcm.h b/sound/soc/at91/at91rm9200-pcm.h
new file mode 100644
index 000000000000..65468f173771
--- /dev/null
+++ b/sound/soc/at91/at91rm9200-pcm.h
@@ -0,0 +1,75 @@
+/*
+ * at91rm9200-pcm.h - ALSA PCM interface for the Atmel AT91RM9200 chip
+ *
+ * Author:      Frank Mandarino <fmandarino@endrelia.com>
+ *              Endrelia Technologies Inc.
+ * Created:     Mar 3, 2006
+ *
+ * Based on pxa2xx-pcm.h by:
+ *
+ * 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.
+ */
+
+/*
+ * Registers and status bits that are required by the PCM driver.
+ */
+struct at91rm9200_ssc_regs {
+        void __iomem    *cr;            /* SSC control */
+        void __iomem    *ier;           /* SSC interrupt enable */
+        void __iomem    *idr;           /* SSC interrupt disable */
+};
+
+struct at91rm9200_pdc_regs {
+        void __iomem    *xpr;           /* PDC recv/trans pointer */
+        void __iomem    *xcr;           /* PDC recv/trans counter */
+        void __iomem    *xnpr;          /* PDC next recv/trans pointer */
+        void __iomem    *xncr;          /* PDC next recv/trans counter */
+        void __iomem    *ptcr;          /* PDC transfer control */
+};
+
+struct at91rm9200_ssc_mask {
+        u32     ssc_enable;             /* SSC recv/trans enable */
+        u32     ssc_disable;            /* SSC recv/trans disable */
+        u32     ssc_endx;               /* SSC ENDTX or ENDRX */
+        u32     ssc_endbuf;             /* SSC TXBUFE or RXBUFF */
+        u32     pdc_enable;             /* PDC recv/trans enable */
+        u32     pdc_disable;            /* PDC recv/trans disable */
+};
+
+
+/*
+ * This structure, shared between the PCM driver and the interface,
+ * contains all information required by the PCM driver to perform the
+ * PDC DMA operation.  All fields except dma_intr_handler() are initialized
+ * by the interface.  The dms_intr_handler() pointer is set by the PCM
+ * driver and called by the interface SSC interrupt handler if it is
+ * non-NULL.
+ */
+typedef struct {
+        char *name;                     /* stream identifier */
+        int pdc_xfer_size;              /* PDC counter increment in bytes */
+        struct at91rm9200_ssc_regs *ssc; /* SSC register addresses */
+        struct at91rm9200_pdc_regs *pdc; /* PDC receive/transmit registers */
+        struct at91rm9200_ssc_mask *mask;/* SSC & PDC status bits */
+        snd_pcm_substream_t *substream;
+        void (*dma_intr_handler)(u32, snd_pcm_substream_t *);
+} at91rm9200_pcm_dma_params_t;
+
+extern struct snd_soc_cpu_dai at91rm9200_i2s_dai[3];
+extern struct snd_soc_platform at91rm9200_soc_platform;
+
+
+/*
+ * SSC I/O helpers.
+ * E.g., at91_ssc_write(AT91_SSC(1) + AT91_SSC_CR, AT91_SSC_RXEN);
+ */
+#define AT91_SSC(x) (((x)==0) ? AT91_VA_BASE_SSC0 :\
+         ((x)==1) ? AT91_VA_BASE_SSC1 : ((x)==2) ? AT91_VA_BASE_SSC2 : NULL)
+#define at91_ssc_read(a)        ((unsigned long) __raw_readl(a))
+#define at91_ssc_write(a,v)     __raw_writel((v),(a))