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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | /* |
3 | * Helpfile for jazzdma.c -- Mips Jazz R4030 DMA controller support | |
4 | */ | |
5 | #ifndef _ASM_JAZZDMA_H | |
6 | #define _ASM_JAZZDMA_H | |
7 | ||
8 | /* | |
9 | * Prototypes and macros | |
10 | */ | |
1da177e4 LT |
11 | extern unsigned long vdma_alloc(unsigned long paddr, unsigned long size); |
12 | extern int vdma_free(unsigned long laddr); | |
13 | extern int vdma_remap(unsigned long laddr, unsigned long paddr, | |
70342287 | 14 | unsigned long size); |
1da177e4 LT |
15 | extern unsigned long vdma_phys2log(unsigned long paddr); |
16 | extern unsigned long vdma_log2phys(unsigned long laddr); | |
17 | extern void vdma_stats(void); /* for debugging only */ | |
18 | ||
19 | extern void vdma_enable(int channel); | |
20 | extern void vdma_disable(int channel); | |
21 | extern void vdma_set_mode(int channel, int mode); | |
22 | extern void vdma_set_addr(int channel, long addr); | |
23 | extern void vdma_set_count(int channel, int count); | |
24 | extern int vdma_get_residue(int channel); | |
25 | extern int vdma_get_enable(int channel); | |
26 | ||
27 | /* | |
28 | * some definitions used by the driver functions | |
29 | */ | |
30 | #define VDMA_PAGESIZE 4096 | |
31 | #define VDMA_PGTBL_ENTRIES 4096 | |
32 | #define VDMA_PGTBL_SIZE (sizeof(VDMA_PGTBL_ENTRY) * VDMA_PGTBL_ENTRIES) | |
33 | #define VDMA_PAGE_EMPTY 0xff000000 | |
34 | ||
35 | /* | |
36 | * Macros to get page no. and offset of a given address | |
37 | * Note that VDMA_PAGE() works for physical addresses only | |
38 | */ | |
70342287 RB |
39 | #define VDMA_PAGE(a) ((unsigned int)(a) >> 12) |
40 | #define VDMA_OFFSET(a) ((unsigned int)(a) & (VDMA_PAGESIZE-1)) | |
1da177e4 LT |
41 | |
42 | /* | |
43 | * error code returned by vdma_alloc() | |
44 | * (See also arch/mips/kernel/jazzdma.c) | |
45 | */ | |
70342287 | 46 | #define VDMA_ERROR 0xffffffff |
1da177e4 LT |
47 | |
48 | /* | |
49 | * VDMA pagetable entry description | |
50 | */ | |
51 | typedef volatile struct VDMA_PGTBL_ENTRY { | |
52 | unsigned int frame; /* physical frame no. */ | |
53 | unsigned int owner; /* owner of this entry (0=free) */ | |
54 | } VDMA_PGTBL_ENTRY; | |
55 | ||
56 | ||
57 | /* | |
58 | * DMA channel control registers | |
59 | * in the R4030 MCT_ADR chip | |
60 | */ | |
61 | #define JAZZ_R4030_CHNL_MODE 0xE0000100 /* 8 DMA Channel Mode Registers, */ | |
62 | /* 0xE0000100,120,140... */ | |
70342287 | 63 | #define JAZZ_R4030_CHNL_ENABLE 0xE0000108 /* 8 DMA Channel Enable Regs, */ |
1da177e4 | 64 | /* 0xE0000108,128,148... */ |
70342287 | 65 | #define JAZZ_R4030_CHNL_COUNT 0xE0000110 /* 8 DMA Channel Byte Cnt Regs, */ |
1da177e4 LT |
66 | /* 0xE0000110,130,150... */ |
67 | #define JAZZ_R4030_CHNL_ADDR 0xE0000118 /* 8 DMA Channel Address Regs, */ | |
68 | /* 0xE0000118,138,158... */ | |
69 | ||
70 | /* channel enable register bits */ | |
71 | ||
70342287 RB |
72 | #define R4030_CHNL_ENABLE (1<<0) |
73 | #define R4030_CHNL_WRITE (1<<1) | |
74 | #define R4030_TC_INTR (1<<8) | |
75 | #define R4030_MEM_INTR (1<<9) | |
76 | #define R4030_ADDR_INTR (1<<10) | |
1da177e4 LT |
77 | |
78 | /* | |
79 | * Channel mode register bits | |
80 | */ | |
70342287 RB |
81 | #define R4030_MODE_ATIME_40 (0) /* device access time on remote bus */ |
82 | #define R4030_MODE_ATIME_80 (1) | |
83 | #define R4030_MODE_ATIME_120 (2) | |
84 | #define R4030_MODE_ATIME_160 (3) | |
85 | #define R4030_MODE_ATIME_200 (4) | |
86 | #define R4030_MODE_ATIME_240 (5) | |
87 | #define R4030_MODE_ATIME_280 (6) | |
88 | #define R4030_MODE_ATIME_320 (7) | |
89 | #define R4030_MODE_WIDTH_8 (1<<3) /* device data bus width */ | |
90 | #define R4030_MODE_WIDTH_16 (2<<3) | |
91 | #define R4030_MODE_WIDTH_32 (3<<3) | |
92 | #define R4030_MODE_INTR_EN (1<<5) | |
93 | #define R4030_MODE_BURST (1<<6) /* Rev. 2 only */ | |
94 | #define R4030_MODE_FAST_ACK (1<<7) /* Rev. 2 only */ | |
1da177e4 LT |
95 | |
96 | #endif /* _ASM_JAZZDMA_H */ |