projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 73b4390f RB |
2 | /* |
| 3 | * Copyright 2002 Integrated Device Technology, Inc. | |
| 4 | * All rights reserved. | |
| 5 | * | |
| 6 | * DMA register definition. | |
| 7 | * | |
| 8 | * Author : ryan.holmQVist@idt.com | |
| 70342287 | 9 | * Date : 20011005 |
| 73b4390f RB |
10 | */ |
| 11 | ||
| 12 | #ifndef _ASM_RC32434_DMA_V_H_ | |
| 13 | #define _ASM_RC32434_DMA_V_H_ | |
| 14 | ||
| 15 | #include <asm/mach-rc32434/dma.h> | |
| 16 | #include <asm/mach-rc32434/rc32434.h> | |
| 17 | ||
| 18 | #define DMA_CHAN_OFFSET 0x14 | |
| 19 | #define IS_DMA_USED(X) (((X) & \ | |
| 20 | (DMA_DESC_FINI | DMA_DESC_DONE | DMA_DESC_TERM)) \ | |
| 21 | != 0) | |
| 22 | #define DMA_COUNT(count) ((count) & DMA_DESC_COUNT_MSK) | |
| 23 | ||
| 24 | #define DMA_HALT_TIMEOUT 500 | |
| 25 | ||
| 26 | static inline int rc32434_halt_dma(struct dma_reg *ch) | |
| 27 | { | |
| 28 | int timeout = 1; | |
| 29 | if (__raw_readl(&ch->dmac) & DMA_CHAN_RUN_BIT) { | |
| 30 | __raw_writel(0, &ch->dmac); | |
| 31 | for (timeout = DMA_HALT_TIMEOUT; timeout > 0; timeout--) { | |
| 32 | if (__raw_readl(&ch->dmas) & DMA_STAT_HALT) { | |
| 33 | __raw_writel(0, &ch->dmas); | |
| 34 | break; | |
| 35 | } | |
| 36 | } | |
| 37 | } | |
| 38 | ||
| 39 | return timeout ? 0 : 1; | |
| 40 | } | |
| 41 | ||
| 42 | static inline void rc32434_start_dma(struct dma_reg *ch, u32 dma_addr) | |
| 43 | { | |
| 44 | __raw_writel(0, &ch->dmandptr); | |
| 45 | __raw_writel(dma_addr, &ch->dmadptr); | |
| 46 | } | |
| 47 | ||
| 48 | static inline void rc32434_chain_dma(struct dma_reg *ch, u32 dma_addr) | |
| 49 | { | |
| 50 | __raw_writel(dma_addr, &ch->dmandptr); | |
| 51 | } | |
| 52 | ||
| 70342287 | 53 | #endif /* _ASM_RC32434_DMA_V_H_ */ |