patch-2.4.0-test8 linux/include/asm-arm/mach/dma.h

• Lines: 50
• Date: Sun Sep 3 11:19:11 2000
• Orig file: v2.4.0-test7/linux/include/asm-arm/mach/dma.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test7/linux/include/asm-arm/mach/dma.h linux/include/asm-arm/mach/dma.h
@@ -0,0 +1,49 @@
+/*
+ * linux/arch/arm/kernel/dma.h
+ *
+ * Copyright (C) 1998-2000 Russell King
+ *
+ * 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 {
+	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	*/
+	unsigned int	using_sg:1;	/* using scatter list?		*/
+	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		*/
+	int		state;		/* Controller state		*/
+	struct scatterlist cur_sg;	/* Current controller buffer	*/
+
+	struct dma_ops	*d_ops;
+};
+
+/* Prototype: void arch_dma_init(dma)
+ * Purpose  : Initialise architecture specific DMA
+ * Params   : dma - pointer to array of DMA structures
+ */
+void arch_dma_init(dma_t *dma);