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Diffstat (limited to 'arch/arm/include/asm/mach/dma.h')
-rw-r--r--arch/arm/include/asm/mach/dma.h57
1 files changed, 57 insertions, 0 deletions
diff --git a/arch/arm/include/asm/mach/dma.h b/arch/arm/include/asm/mach/dma.h
new file mode 100644
index 00000000000..fc7278ea714
--- /dev/null
+++ b/arch/arm/include/asm/mach/dma.h
@@ -0,0 +1,57 @@
+/*
+ * arch/arm/include/asm/mach/dma.h
+ *
+ * Copyright (C) 1998-2000 Russell King
+ *
+ * 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.
+ *
+ * This header file describes the interface between the generic DMA handler
+ * (dma.c) and the architecture-specific DMA backends (dma-*.c)
+ */
+
+struct dma_struct;
+typedef struct dma_struct dma_t;
+
+struct dma_ops {
+ int (*request)(dmach_t, dma_t *); /* optional */
+ void (*free)(dmach_t, dma_t *); /* optional */
+ void (*enable)(dmach_t, dma_t *); /* mandatory */
+ void (*disable)(dmach_t, dma_t *); /* mandatory */
+ int (*residue)(dmach_t, dma_t *); /* optional */
+ int (*setspeed)(dmach_t, dma_t *, int); /* optional */
+ char *type;
+};
+
+struct dma_struct {
+ void *addr; /* single DMA address */
+ unsigned long count; /* single DMA size */
+ struct scatterlist buf; /* single DMA */
+ int sgcount; /* number of DMA SG */
+ struct scatterlist *sg; /* DMA Scatter-Gather List */
+
+ unsigned int active:1; /* Transfer active */
+ unsigned int invalid:1; /* Address/Count changed */
+
+ dmamode_t dma_mode; /* DMA mode */
+ int speed; /* DMA speed */
+
+ unsigned int lock; /* Device is allocated */
+ const char *device_id; /* Device name */
+
+ unsigned int dma_base; /* Controller base address */
+ int dma_irq; /* Controller IRQ */
+ struct scatterlist cur_sg; /* Current controller buffer */
+ unsigned int state;
+
+ struct dma_ops *d_ops;
+};
+
+/* Prototype: void arch_dma_init(dma)
+ * Purpose : Initialise architecture specific DMA
+ * Params : dma - pointer to array of DMA structures
+ */
+extern void arch_dma_init(dma_t *dma);
+
+extern void isa_init_dma(dma_t *dma);