1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright 2002 Integrated Device Technology, Inc.
* All rights reserved.
*
* DMA register definition.
*
* Author : ryan.holmQVist@idt.com
* Date : 20011005
*/
#ifndef _ASM_RC32434_DMA_V_H_
#define _ASM_RC32434_DMA_V_H_
#include <asm/mach-rc32434/dma.h>
#include <asm/mach-rc32434/rc32434.h>
#define DMA_CHAN_OFFSET 0x14
#define IS_DMA_USED(X) (((X) & \
(DMA_DESC_FINI | DMA_DESC_DONE | DMA_DESC_TERM)) \
!= 0)
#define DMA_COUNT(count) ((count) & DMA_DESC_COUNT_MSK)
#define DMA_HALT_TIMEOUT 500
static inline int rc32434_halt_dma(struct dma_reg *ch)
{
int timeout = 1;
if (__raw_readl(&ch->dmac) & DMA_CHAN_RUN_BIT) {
__raw_writel(0, &ch->dmac);
for (timeout = DMA_HALT_TIMEOUT; timeout > 0; timeout--) {
if (__raw_readl(&ch->dmas) & DMA_STAT_HALT) {
__raw_writel(0, &ch->dmas);
break;
}
}
}
return timeout ? 0 : 1;
}
static inline void rc32434_start_dma(struct dma_reg *ch, u32 dma_addr)
{
__raw_writel(0, &ch->dmandptr);
__raw_writel(dma_addr, &ch->dmadptr);
}
static inline void rc32434_chain_dma(struct dma_reg *ch, u32 dma_addr)
{
__raw_writel(dma_addr, &ch->dmandptr);
}
#endif /* _ASM_RC32434_DMA_V_H_ */
|
