1/* 2 * Copyright 2002 Integrated Device Technology, Inc. 3 * All rights reserved. 4 * 5 * DMA register definition. 6 * 7 * Author : ryan.holmQVist@idt.com 8 * Date : 20011005 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 25static 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 41static 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 47static inline void rc32434_chain_dma(struct dma_reg *ch, u32 dma_addr) 48{ 49 __raw_writel(dma_addr, &ch->dmandptr); 50} 51 52#endif /* _ASM_RC32434_DMA_V_H_ */ 53