1 files changed, 67 insertions, 0 deletions

diff --git a/include/asm-arm/arch-pxa/dma.h b/include/asm-arm/arch-pxa/dma.h
new file mode 100644
index 000000000000..56db3d49bfc8
--- /dev/null
+++ b/include/asm-arm/arch-pxa/dma.h
@@ -0,0 +1,67 @@
+/*
+ *  linux/include/asm-arm/arch-pxa/dma.h
+ *
+ *  Author:     Nicolas Pitre
+ *  Created:    Jun 15, 2001
+ *  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 __ASM_ARCH_DMA_H
+#define __ASM_ARCH_DMA_H
+
+#define MAX_DMA_ADDRESS         0xffffffff
+
+/* No DMA as the rest of the world see it */
+#define MAX_DMA_CHANNELS        0
+
+/*
+ * Descriptor structure for PXA's DMA engine
+ * Note: this structure must always be aligned to a 16-byte boundary.
+ */
+
+typedef struct pxa_dma_desc {
+        volatile u32 ddadr;     /* Points to the next descriptor + flags */
+        volatile u32 dsadr;     /* DSADR value for the current transfer */
+        volatile u32 dtadr;     /* DTADR value for the current transfer */
+        volatile u32 dcmd;      /* DCMD value for the current transfer */
+} pxa_dma_desc;
+
+#if defined(CONFIG_PXA27x)
+
+#define PXA_DMA_CHANNELS        32
+#define PXA_DMA_NBCH(prio)      ((prio == DMA_PRIO_LOW) ? 16 : 8)
+
+typedef enum {
+        DMA_PRIO_HIGH = 0,
+        DMA_PRIO_MEDIUM = 8,
+        DMA_PRIO_LOW = 16
+} pxa_dma_prio;
+
+#elif defined(CONFIG_PXA25x)
+
+#define PXA_DMA_CHANNELS        16
+#define PXA_DMA_NBCH(prio)      ((prio == DMA_PRIO_LOW) ? 8 : 4)
+
+typedef enum {
+        DMA_PRIO_HIGH = 0,
+        DMA_PRIO_MEDIUM = 4,
+        DMA_PRIO_LOW = 8
+} pxa_dma_prio;
+
+#endif
+
+/*
+ * DMA registration
+ */
+
+int pxa_request_dma (char *name,
+                         pxa_dma_prio prio,
+                         void (*irq_handler)(int, void *, struct pt_regs *),
+                         void *data);
+
+void pxa_free_dma (int dma_ch);
+
+#endif /* _ASM_ARCH_DMA_H */