| * linux/include/asm-arm/arch-pxa/dma.h |
| * 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. |
| * 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 */ |
| #if defined(CONFIG_PXA27x) |
| #define PXA_DMA_CHANNELS 32 |
| #define PXA_DMA_NBCH(prio) ((prio == DMA_PRIO_LOW) ? 16 : 8) |
| #elif defined(CONFIG_PXA25x) |
| #define PXA_DMA_CHANNELS 16 |
| #define PXA_DMA_NBCH(prio) ((prio == DMA_PRIO_LOW) ? 8 : 4) |
| int pxa_request_dma (char *name, |
| void (*irq_handler)(int, void *, struct pt_regs *), |
| void pxa_free_dma (int dma_ch); |
| #endif /* _ASM_ARCH_DMA_H */ |