diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 2008-07-16 17:12:25 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2008-07-20 15:38:18 +0200 |
| commit | 73b4390fb23456964201abda79f1210fe337d01a (patch) | |
| tree | bc613dfa0a3926bd889025cebbc28ae034b8c854 /include/asm-mips/mach-rc32434/dma_v.h | |
| parent | [MIPS] IP32: Use common SGI button driver (diff) | |
| download | linux-73b4390fb23456964201abda79f1210fe337d01a.tar.xz linux-73b4390fb23456964201abda79f1210fe337d01a.zip | |
[MIPS] Routerboard 532: Support for base system
Signed-off-by: Phil Sutter <n0-1@freewrt.org>
Signed-off-by: Florian Fainelli <florian.fainelli@telecomint.eu>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include/asm-mips/mach-rc32434/dma_v.h')
| -rw-r--r-- | include/asm-mips/mach-rc32434/dma_v.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/include/asm-mips/mach-rc32434/dma_v.h b/include/asm-mips/mach-rc32434/dma_v.h new file mode 100644 index 000000000000..173a9f9146cd --- /dev/null +++ b/include/asm-mips/mach-rc32434/dma_v.h @@ -0,0 +1,52 @@ +/* + * Copyright 2002 Integrated Device Technology, Inc. + * All rights reserved. + * + * DMA register definition. + * + * Author : ryan.holmQVist@idt.com + * Date : 20011005 + */ + +#ifndef _ASM_RC32434_DMA_V_H_ +#define _ASM_RC32434_DMA_V_H_ + +#include <asm/mach-rc32434/dma.h> +#include <asm/mach-rc32434/rc32434.h> + +#define DMA_CHAN_OFFSET 0x14 +#define IS_DMA_USED(X) (((X) & \ + (DMA_DESC_FINI | DMA_DESC_DONE | DMA_DESC_TERM)) \ + != 0) +#define DMA_COUNT(count) ((count) & DMA_DESC_COUNT_MSK) + +#define DMA_HALT_TIMEOUT 500 + +static inline int rc32434_halt_dma(struct dma_reg *ch) +{ + int timeout = 1; + if (__raw_readl(&ch->dmac) & DMA_CHAN_RUN_BIT) { + __raw_writel(0, &ch->dmac); + for (timeout = DMA_HALT_TIMEOUT; timeout > 0; timeout--) { + if (__raw_readl(&ch->dmas) & DMA_STAT_HALT) { + __raw_writel(0, &ch->dmas); + break; + } + } + } + + return timeout ? 0 : 1; +} + +static inline void rc32434_start_dma(struct dma_reg *ch, u32 dma_addr) +{ + __raw_writel(0, &ch->dmandptr); + __raw_writel(dma_addr, &ch->dmadptr); +} + +static inline void rc32434_chain_dma(struct dma_reg *ch, u32 dma_addr) +{ + __raw_writel(dma_addr, &ch->dmandptr); +} + +#endif /* _ASM_RC32434_DMA_V_H_ */ |