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/arch/mips/include/asm/mach-rc32434/dma_v.h

https://bitbucket.org/thekraven/iscream_thunderc-2.6.35
C++ Header | 52 lines | 34 code | 9 blank | 9 comment | 4 complexity | 2bc4a8e40e24da032de09f3db834d269 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
 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_ */