projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 73b4390f RB |
1 | /* |
| 2 | * Copyright 2002 Integrated Device Technology, Inc. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * DMA register definition. | |
| 6 | * | |
| 7 | * Author : ryan.holmQVist@idt.com | |
| 70342287 | 8 | * Date : 20011005 |
| 73b4390f RB |
9 | */ |
| 10 | ||
| 11 | #ifndef _ASM_RC32434_DMA_V_H_ | |
| 12 | #define _ASM_RC32434_DMA_V_H_ | |
| 13 | ||
| 14 | #include <asm/mach-rc32434/dma.h> | |
| 15 | #include <asm/mach-rc32434/rc32434.h> | |
| 16 | ||
| 17 | #define DMA_CHAN_OFFSET 0x14 | |
| 18 | #define IS_DMA_USED(X) (((X) & \ | |
| 19 | (DMA_DESC_FINI | DMA_DESC_DONE | DMA_DESC_TERM)) \ | |
| 20 | != 0) | |
| 21 | #define DMA_COUNT(count) ((count) & DMA_DESC_COUNT_MSK) | |
| 22 | ||
| 23 | #define DMA_HALT_TIMEOUT 500 | |
| 24 | ||
| 25 | static inline int rc32434_halt_dma(struct dma_reg *ch) | |
| 26 | { | |
| 27 | int timeout = 1; | |
| 28 | if (__raw_readl(&ch->dmac) & DMA_CHAN_RUN_BIT) { | |
| 29 | __raw_writel(0, &ch->dmac); | |
| 30 | for (timeout = DMA_HALT_TIMEOUT; timeout > 0; timeout--) { | |
| 31 | if (__raw_readl(&ch->dmas) & DMA_STAT_HALT) { | |
| 32 | __raw_writel(0, &ch->dmas); | |
| 33 | break; | |
| 34 | } | |
| 35 | } | |
| 36 | } | |
| 37 | ||
| 38 | return timeout ? 0 : 1; | |
| 39 | } | |
| 40 | ||
| 41 | static inline void rc32434_start_dma(struct dma_reg *ch, u32 dma_addr) | |
| 42 | { | |
| 43 | __raw_writel(0, &ch->dmandptr); | |
| 44 | __raw_writel(dma_addr, &ch->dmadptr); | |
| 45 | } | |
| 46 | ||
| 47 | static inline void rc32434_chain_dma(struct dma_reg *ch, u32 dma_addr) | |
| 48 | { | |
| 49 | __raw_writel(dma_addr, &ch->dmandptr); | |
| 50 | } | |
| 51 | ||
| 70342287 | 52 | #endif /* _ASM_RC32434_DMA_V_H_ */ |