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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - include/asm-mips/jazzdma.h
2 * Helpfile for jazzdma.c -- Mips Jazz R4030 DMA controller support
8 * Prototypes and macros
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
,
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 */
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
);
27 * some definitions used by the driver functions
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
35 * Macros to get page no. and offset of a given address
36 * Note that VDMA_PAGE() works for physical addresses only
38 #define VDMA_PAGE(a) ((unsigned int)(a) >> 12)
39 #define VDMA_OFFSET(a) ((unsigned int)(a) & (VDMA_PAGESIZE-1))
42 * error code returned by vdma_alloc()
43 * (See also arch/mips/kernel/jazzdma.c)
45 #define VDMA_ERROR 0xffffffff
48 * VDMA pagetable entry description
50 typedef volatile struct VDMA_PGTBL_ENTRY
{
51 unsigned int frame
; /* physical frame no. */
52 unsigned int owner
; /* owner of this entry (0=free) */
57 * DMA channel control registers
58 * in the R4030 MCT_ADR chip
60 #define JAZZ_R4030_CHNL_MODE 0xE0000100 /* 8 DMA Channel Mode Registers, */
61 /* 0xE0000100,120,140... */
62 #define JAZZ_R4030_CHNL_ENABLE 0xE0000108 /* 8 DMA Channel Enable Regs, */
63 /* 0xE0000108,128,148... */
64 #define JAZZ_R4030_CHNL_COUNT 0xE0000110 /* 8 DMA Channel Byte Cnt Regs, */
65 /* 0xE0000110,130,150... */
66 #define JAZZ_R4030_CHNL_ADDR 0xE0000118 /* 8 DMA Channel Address Regs, */
67 /* 0xE0000118,138,158... */
69 /* channel enable register bits */
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)
78 * Channel mode register bits
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 */
95 #endif /* _ASM_JAZZDMA_H */