include/asm-mips/jazzdma.h

/* */
   1 /*
   2  * Helpfile for jazzdma.c -- Mips Jazz R4030 DMA controller support
   3  */
   4 
   5 #ifndef __ASM_JAZZDMA_H
   6 #define __ASM_JAZZDMA_H
   7 
   8 /*
   9  * Prototypes and macros
  10  */
  11 
  12 unsigned long vdma_init(unsigned long memory_start, unsigned long memory_end);
  13 unsigned long vdma_alloc(unsigned long paddr, unsigned long size);
  14 int vdma_free(unsigned long laddr);
  15 int vdma_remap(unsigned long laddr, unsigned long paddr, unsigned long size);
  16 unsigned long vdma_phys2log(unsigned long paddr);
  17 unsigned long vdma_log2phys(unsigned long laddr);
  18 void vdma_stats(void);          /* for debugging only */
  19 
  20 void vdma_enable(int channel);
  21 void vdma_disable(int channel);
  22 void vdma_set_mode(int channel, int mode);
  23 void vdma_set_addr(int channel, long addr);
  24 void vdma_set_count(int channel, int count);
  25 int vdma_get_residue(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         0
  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  */
  39 #define VDMA_PAGE(a)            ((unsigned int)(a) >> 12)
  40 #define VDMA_OFFSET(a)          ((unsigned int)(a) & (VDMA_PAGESIZE-1))
  41 
  42 /*
  43  * error code returned by vdma_alloc()
  44  * (See also arch/mips/kernel/jazzdma.c)
  45  */
  46 #define VDMA_ERROR              0xffffffff
  47 
  48 /*
  49  * VDMA pagetable entry description
  50  */
  51 typedef volatile struct VDMA_PGTBL_ENTRY
  52 {
  53         unsigned int frame;             /* physical frame no. */
  54         unsigned int owner;             /* owner of this entry (0=free) */
  55 } VDMA_PGTBL_ENTRY;
  56 
  57 
  58 /*
  59  * DMA channel control registers
  60  * in the R4030 MCT_ADR chip
  61  */
  62 #define JAZZ_R4030_CHNL_MODE    0xE0000100      /* 8 DMA Channel Mode Registers, */
  63                                                 /* 0xE0000100,120,140... */
  64 #define JAZZ_R4030_CHNL_ENABLE  0xE0000108      /* 8 DMA Channel Enable Regs, */
  65                                                 /* 0xE0000108,128,148... */
  66 #define JAZZ_R4030_CHNL_COUNT   0xE0000110      /* 8 DMA Channel Byte Cnt Regs, */
  67                                                 /* 0xE0000110,130,150... */
  68 #define JAZZ_R4030_CHNL_ADDR    0xE0000118      /* 8 DMA Channel Address Regs, */
  69                                                 /* 0xE0000118,138,158... */
  70 
  71 /* channel enable register bits */
  72 
  73 #define R4030_CHNL_ENABLE        (1<<0)
  74 #define R4030_CHNL_WRITE         (1<<1)
  75 #define R4030_TC_INTR            (1<<8)
  76 #define R4030_MEM_INTR           (1<<9)
  77 #define R4030_ADDR_INTR          (1<<10)
  78 
  79 /* channel mode register bits */
  80 
  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 */
  95 
  96 #endif /* __ASM_JAZZDMA_H */
/* */
root/include/asm-mips/jazzdma.h

INCLUDED FROM
