From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- include/asm-arm/arch-pxa/dma.h | 67 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 include/asm-arm/arch-pxa/dma.h (limited to 'include/asm-arm/arch-pxa/dma.h') diff --git a/include/asm-arm/arch-pxa/dma.h b/include/asm-arm/arch-pxa/dma.h new file mode 100644 index 00000000000..56db3d49bfc --- /dev/null +++ b/include/asm-arm/arch-pxa/dma.h @@ -0,0 +1,67 @@ +/* + * 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 + +#define MAX_DMA_ADDRESS 0xffffffff + +/* No DMA as the rest of the world see it */ +#define MAX_DMA_CHANNELS 0 + +/* + * 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; + +#if defined(CONFIG_PXA27x) + +#define PXA_DMA_CHANNELS 32 +#define PXA_DMA_NBCH(prio) ((prio == DMA_PRIO_LOW) ? 16 : 8) + +typedef enum { + DMA_PRIO_HIGH = 0, + DMA_PRIO_MEDIUM = 8, + DMA_PRIO_LOW = 16 +} pxa_dma_prio; + +#elif defined(CONFIG_PXA25x) + +#define PXA_DMA_CHANNELS 16 +#define PXA_DMA_NBCH(prio) ((prio == DMA_PRIO_LOW) ? 8 : 4) + +typedef enum { + DMA_PRIO_HIGH = 0, + DMA_PRIO_MEDIUM = 4, + DMA_PRIO_LOW = 8 +} pxa_dma_prio; + +#endif + +/* + * DMA registration + */ + +int pxa_request_dma (char *name, + pxa_dma_prio prio, + void (*irq_handler)(int, void *, struct pt_regs *), + void *data); + +void pxa_free_dma (int dma_ch); + +#endif /* _ASM_ARCH_DMA_H */ -- cgit v1.2.3