1 files changed, 79 insertions, 0 deletions

diff --git a/sound/soc/at32/at32-pcm.h b/sound/soc/at32/at32-pcm.h
new file mode 100644
index 000000000000..2a52430417da
--- /dev/null
+++ b/sound/soc/at32/at32-pcm.h
@@ -0,0 +1,79 @@
+/* sound/soc/at32/at32-pcm.h
+ * ASoC PCM interface for Atmel AT32 SoC
+ *
+ * Copyright (C) 2008 Long Range Systems
+ *    Geoffrey Wossum <gwossum@acm.org>
+ *
+ * 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 __SOUND_SOC_AT32_AT32_PCM_H
+#define __SOUND_SOC_AT32_AT32_PCM_H __FILE__
+
+#include <linux/atmel-ssc.h>
+
+
+/*
+ * Registers and status bits that are required by the PCM driver
+ * TODO: Is ptcr really used?
+ */
+struct at32_pdc_regs {
+        u32 xpr;                /* PDC RX/TX pointer */
+        u32 xcr;                /* PDC RX/TX counter */
+        u32 xnpr;               /* PDC next RX/TX pointer */
+        u32 xncr;               /* PDC next RX/TX counter */
+        u32 ptcr;               /* PDC transfer control */
+};
+
+
+
+/*
+ * SSC mask info
+ */
+struct at32_ssc_mask {
+        u32 ssc_enable;         /* SSC RX/TX enable */
+        u32 ssc_disable;        /* SSC RX/TX disable */
+        u32 ssc_endx;           /* SSC ENDTX or ENDRX */
+        u32 ssc_endbuf;         /* SSC TXBUFF or RXBUFF */
+        u32 pdc_enable;         /* PDC RX/TX enable */
+        u32 pdc_disable;        /* PDC RX/TX 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.
+ */
+struct at32_pcm_dma_params {
+        char *name;             /* stream identifier */
+        int pdc_xfer_size;      /* PDC counter increment in bytes */
+        struct ssc_device *ssc; /* SSC device for stream */
+        struct at32_pdc_regs *pdc;      /* PDC register info */
+        struct at32_ssc_mask *mask;     /* SSC mask info */
+        struct snd_pcm_substream *substream;
+        void (*dma_intr_handler) (u32, struct snd_pcm_substream *);
+};
+
+
+
+/*
+ * The AT32 ASoC platform driver
+ */
+extern struct snd_soc_platform at32_soc_platform;
+
+
+
+/*
+ * SSC register access (since ssc_writel() / ssc_readl() require literal name)
+ */
+#define ssc_readx(base, reg)            (__raw_readl((base) + (reg)))
+#define ssc_writex(base, reg, value)    __raw_writel((value), (base) + (reg))
+
+#endif /* __SOUND_SOC_AT32_AT32_PCM_H */