| Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * arch/arm/mach-pxa/include/mach/dma.h |
| 3 | * |
| 4 | * Author: Nicolas Pitre |
| 5 | * Created: Jun 15, 2001 |
| 6 | * Copyright: MontaVista Software, Inc. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | #ifndef __ASM_ARCH_DMA_H |
| 13 | #define __ASM_ARCH_DMA_H |
| 14 | |
| 15 | /* |
| 16 | * Descriptor structure for PXA's DMA engine |
| 17 | * Note: this structure must always be aligned to a 16-byte boundary. |
| 18 | */ |
| 19 | |
| 20 | typedef struct pxa_dma_desc { |
| 21 | volatile u32 ddadr; /* Points to the next descriptor + flags */ |
| 22 | volatile u32 dsadr; /* DSADR value for the current transfer */ |
| 23 | volatile u32 dtadr; /* DTADR value for the current transfer */ |
| 24 | volatile u32 dcmd; /* DCMD value for the current transfer */ |
| 25 | } pxa_dma_desc; |
| 26 | |
| 27 | typedef enum { |
| 28 | DMA_PRIO_HIGH = 0, |
| 29 | DMA_PRIO_MEDIUM = 1, |
| 30 | DMA_PRIO_LOW = 2 |
| 31 | } pxa_dma_prio; |
| 32 | |
| 33 | #if defined(CONFIG_MACH_ARMCORE) && defined(CONFIG_PCI) |
| 34 | #define HAVE_ARCH_PCI_SET_DMA_MASK 1 |
| 35 | #endif |
| 36 | |
| 37 | /* |
| 38 | * DMA registration |
| 39 | */ |
| 40 | |
| 41 | int __init pxa_init_dma(int num_ch); |
| 42 | |
| 43 | int pxa_request_dma (char *name, |
| 44 | pxa_dma_prio prio, |
| 45 | void (*irq_handler)(int, void *), |
| 46 | void *data); |
| 47 | |
| 48 | void pxa_free_dma (int dma_ch); |
| 49 | |
| 50 | #endif /* _ASM_ARCH_DMA_H */ |