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- /*
- * 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);
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