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 
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 
52 #endif  /* _ASM_RC32434_DMA_V_H_ */
53