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_H
13 #define __ASM_RC32434_DMA_H
14
15 #include <asm/mach-rc32434/rb.h>
16
17 #define DMA0_BASE_ADDR 0x18040000
18
19 /*
20 * DMA descriptor (in physical memory).
21 */
22
23 struct dma_desc {
24 u32 control; /* Control. use DMAD_* */
25 u32 ca; /* Current Address. */
26 u32 devcs; /* Device control and status. */
27 u32 link; /* Next descriptor in chain. */
28 };
29
30 #define DMA_DESC_SIZ sizeof(struct dma_desc)
31 #define DMA_DESC_COUNT_BIT 0
32 #define DMA_DESC_COUNT_MSK 0x0003ffff
33 #define DMA_DESC_DS_BIT 20
34 #define DMA_DESC_DS_MSK 0x00300000
35
36 #define DMA_DESC_DEV_CMD_BIT 22
37 #define DMA_DESC_DEV_CMD_MSK 0x01c00000
38
39 /* DMA command sizes */
40 #define DMA_DESC_DEV_CMD_BYTE 0
41 #define DMA_DESC_DEV_CMD_HLF_WD 1
42 #define DMA_DESC_DEV_CMD_WORD 2
43 #define DMA_DESC_DEV_CMD_2WORDS 3
44 #define DMA_DESC_DEV_CMD_4WORDS 4
45 #define DMA_DESC_DEV_CMD_6WORDS 5
46 #define DMA_DESC_DEV_CMD_8WORDS 6
47 #define DMA_DESC_DEV_CMD_16WORDS 7
48
49 /* DMA descriptors interrupts */
50 #define DMA_DESC_COF (1 << 25) /* Chain on finished */
51 #define DMA_DESC_COD (1 << 26) /* Chain on done */
52 #define DMA_DESC_IOF (1 << 27) /* Interrupt on finished */
53 #define DMA_DESC_IOD (1 << 28) /* Interrupt on done */
54 #define DMA_DESC_TERM (1 << 29) /* Terminated */
55 #define DMA_DESC_DONE (1 << 30) /* Done */
56 #define DMA_DESC_FINI (1 << 31) /* Finished */
57
58 /*
59 * DMA register (within Internal Register Map).
60 */
61
62 struct dma_reg {
63 u32 dmac; /* Control. */
64 u32 dmas; /* Status. */
65 u32 dmasm; /* Mask. */
66 u32 dmadptr; /* Descriptor pointer. */
67 u32 dmandptr; /* Next descriptor pointer. */
68 };
69
70 /* DMA channels specific registers */
71 #define DMA_CHAN_RUN_BIT (1 << 0)
72 #define DMA_CHAN_DONE_BIT (1 << 1)
73 #define DMA_CHAN_MODE_BIT (1 << 2)
74 #define DMA_CHAN_MODE_MSK 0x0000000c
75 #define DMA_CHAN_MODE_AUTO 0
76 #define DMA_CHAN_MODE_BURST 1
77 #define DMA_CHAN_MODE_XFRT 2
78 #define DMA_CHAN_MODE_RSVD 3
79 #define DMA_CHAN_ACT_BIT (1 << 4)
80
81 /* DMA status registers */
82 #define DMA_STAT_FINI (1 << 0)
83 #define DMA_STAT_DONE (1 << 1)
84 #define DMA_STAT_CHAIN (1 << 2)
85 #define DMA_STAT_ERR (1 << 3)
86 #define DMA_STAT_HALT (1 << 4)
87
88 /*
89 * DMA channel definitions
90 */
91
92 #define DMA_CHAN_ETH_RCV 0
93 #define DMA_CHAN_ETH_XMT 1
94 #define DMA_CHAN_MEM_TO_FIFO 2
95 #define DMA_CHAN_FIFO_TO_MEM 3
96 #define DMA_CHAN_PCI_TO_MEM 4
97 #define DMA_CHAN_MEM_TO_PCI 5
98 #define DMA_CHAN_COUNT 6
99
100 struct dma_channel {
101 struct dma_reg ch[DMA_CHAN_COUNT];
102 };
103
104 #endif /* __ASM_RC32434_DMA_H */
105
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