| /* |
| * 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 |
| |
| /* |
| * 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; |
| |
| 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 */ |