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