1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright 2002 Integrated Device Technology, Inc.
4 *		All rights reserved.
5 *
6 * DMA register definition.
7 *
8 * Author : ryan.holmQVist@idt.com
9 * Date	  : 20011005
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
26static 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
42static 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
48static inline void rc32434_chain_dma(struct dma_reg *ch, u32 dma_addr)
49{
50	__raw_writel(dma_addr, &ch->dmandptr);
51}
52
53#endif	/* _ASM_RC32434_DMA_V_H_ */
54