projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 73b4390f RB |
2 | /* |
| 3 | * Copyright 2002 Integrated Device Technology, Inc. | |
| 4 | * All rights reserved. | |
| 5 | * | |
| 6 | * DMA register definition. | |
| 7 | * | |
| 8 | * Author : ryan.holmQVist@idt.com | |
| 70342287 | 9 | * Date : 20011005 |
| 73b4390f RB |
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 | |
| 70342287 RB |
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 | |
| 73b4390f RB |
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 | ||
| 70342287 | 104 | #endif /* __ASM_RC32434_DMA_H */ |