2 * Copyright 2002 Integrated Device Technology, Inc.
5 * DMA register definition.
7 * Author : ryan.holmQVist@idt.com
11 #ifndef __ASM_RC32434_DMA_H
12 #define __ASM_RC32434_DMA_H
14 #include <asm/mach-rc32434/rb.h>
16 #define DMA0_BASE_ADDR 0x18040000
19 * DMA descriptor (in physical memory).
23 u32 control; /* Control. use DMAD_* */
24 u32 ca; /* Current Address. */
25 u32 devcs; /* Device control and status. */
26 u32 link; /* Next descriptor in chain. */
29 #define DMA_DESC_SIZ sizeof(struct dma_desc)
30 #define DMA_DESC_COUNT_BIT 0
31 #define DMA_DESC_COUNT_MSK 0x0003ffff
32 #define DMA_DESC_DS_BIT 20
33 #define DMA_DESC_DS_MSK 0x00300000
35 #define DMA_DESC_DEV_CMD_BIT 22
36 #define DMA_DESC_DEV_CMD_MSK 0x01c00000
38 /* DMA command sizes */
39 #define DMA_DESC_DEV_CMD_BYTE 0
40 #define DMA_DESC_DEV_CMD_HLF_WD 1
41 #define DMA_DESC_DEV_CMD_WORD 2
42 #define DMA_DESC_DEV_CMD_2WORDS 3
43 #define DMA_DESC_DEV_CMD_4WORDS 4
44 #define DMA_DESC_DEV_CMD_6WORDS 5
45 #define DMA_DESC_DEV_CMD_8WORDS 6
46 #define DMA_DESC_DEV_CMD_16WORDS 7
48 /* DMA descriptors interrupts */
49 #define DMA_DESC_COF (1 << 25) /* Chain on finished */
50 #define DMA_DESC_COD (1 << 26) /* Chain on done */
51 #define DMA_DESC_IOF (1 << 27) /* Interrupt on finished */
52 #define DMA_DESC_IOD (1 << 28) /* Interrupt on done */
53 #define DMA_DESC_TERM (1 << 29) /* Terminated */
54 #define DMA_DESC_DONE (1 << 30) /* Done */
55 #define DMA_DESC_FINI (1 << 31) /* Finished */
58 * DMA register (within Internal Register Map).
62 u32 dmac; /* Control. */
63 u32 dmas; /* Status. */
64 u32 dmasm; /* Mask. */
65 u32 dmadptr; /* Descriptor pointer. */
66 u32 dmandptr; /* Next descriptor pointer. */
69 /* DMA channels specific registers */
70 #define DMA_CHAN_RUN_BIT (1 << 0)
71 #define DMA_CHAN_DONE_BIT (1 << 1)
72 #define DMA_CHAN_MODE_BIT (1 << 2)
73 #define DMA_CHAN_MODE_MSK 0x0000000c
74 #define DMA_CHAN_MODE_AUTO 0
75 #define DMA_CHAN_MODE_BURST 1
76 #define DMA_CHAN_MODE_XFRT 2
77 #define DMA_CHAN_MODE_RSVD 3
78 #define DMA_CHAN_ACT_BIT (1 << 4)
80 /* DMA status registers */
81 #define DMA_STAT_FINI (1 << 0)
82 #define DMA_STAT_DONE (1 << 1)
83 #define DMA_STAT_CHAIN (1 << 2)
84 #define DMA_STAT_ERR (1 << 3)
85 #define DMA_STAT_HALT (1 << 4)
88 * DMA channel definitions
91 #define DMA_CHAN_ETH_RCV 0
92 #define DMA_CHAN_ETH_XMT 1
93 #define DMA_CHAN_MEM_TO_FIFO 2
94 #define DMA_CHAN_FIFO_TO_MEM 3
95 #define DMA_CHAN_PCI_TO_MEM 4
96 #define DMA_CHAN_MEM_TO_PCI 5
97 #define DMA_CHAN_COUNT 6
100 struct dma_reg ch[DMA_CHAN_COUNT];
103 #endif /* __ASM_RC32434_DMA_H */