Logo Search packages:      
Sourcecode: linux version File versions  Download package

dma.h

/*
 *  arch/arm/mach-pxa/include/mach/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

/*
 * Descriptor structure for PXA's DMA engine
 * Note: this structure must always be aligned to a 16-byte boundary.
 */

00020 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;

typedef enum {
      DMA_PRIO_HIGH = 0,
      DMA_PRIO_MEDIUM = 1,
      DMA_PRIO_LOW = 2
} pxa_dma_prio;

#if defined(CONFIG_MACH_ARMCORE) && defined(CONFIG_PCI)
#define HAVE_ARCH_PCI_SET_DMA_MASK  1
#endif

/*
 * DMA registration
 */

int __init pxa_init_dma(int num_ch);

int pxa_request_dma (char *name,
                   pxa_dma_prio prio,
                   void (*irq_handler)(int, void *),
                   void *data);

void pxa_free_dma (int dma_ch);

#endif /* _ASM_ARCH_DMA_H */

Generated by  Doxygen 1.6.0   Back to index