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
rc32434_halt_dma(struct dma_reg * ch)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
rc32434_start_dma(struct dma_reg * ch,u32 dma_addr)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
rc32434_chain_dma(struct dma_reg * ch,u32 dma_addr)47 static 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