arch/m68k/include/asm/mcfdma.h

   1 /****************************************************************************/
   2
   3 /*
   4  *      mcfdma.h -- Coldfire internal DMA support defines.
   5  *
   6  *      (C) Copyright 1999, Rob Scott (rscott@mtrob.ml.org)
   7  */
   8
   9 /****************************************************************************/
  10 #ifndef mcfdma_h
  11 #define mcfdma_h
  12 /****************************************************************************/
  13
  14 #if !defined(CONFIG_M5272)
  15
  16 /*
  17  *      Define the DMA register set addresses.
  18  *      Note: these are longword registers, use unsigned long as data type
  19  */
  20 #define MCFDMA_SAR              0x00            /* DMA source address (r/w) */
  21 #define MCFDMA_DAR              0x01            /* DMA destination adr (r/w) */
  22 /* these are word registers, use unsigned short data type */
  23 #define MCFDMA_DCR              0x04            /* DMA control reg (r/w) */
  24 #define MCFDMA_BCR              0x06            /* DMA byte count reg (r/w) */
  25 /* these are byte registers, use unsiged char data type */
  26 #define MCFDMA_DSR              0x10            /* DMA status reg (r/w) */
  27 #define MCFDMA_DIVR             0x14            /* DMA interrupt vec (r/w) */
  28
  29 /*
  30  *      Bit definitions for the DMA Control Register (DCR).
  31  */
  32 #define MCFDMA_DCR_INT          0x8000          /* Enable completion irq */
  33 #define MCFDMA_DCR_EEXT         0x4000          /* Enable external DMA req */
  34 #define MCFDMA_DCR_CS           0x2000          /* Enable cycle steal */
  35 #define MCFDMA_DCR_AA           0x1000          /* Enable auto alignment */
  36 #define MCFDMA_DCR_BWC_MASK     0x0E00          /* Bandwidth ctl mask */
  37 #define MCFDMA_DCR_BWC_512      0x0200          /* Bandwidth:   512 Bytes */
  38 #define MCFDMA_DCR_BWC_1024     0x0400          /* Bandwidth:  1024 Bytes */
  39 #define MCFDMA_DCR_BWC_2048     0x0600          /* Bandwidth:  2048 Bytes */
  40 #define MCFDMA_DCR_BWC_4096     0x0800          /* Bandwidth:  4096 Bytes */
  41 #define MCFDMA_DCR_BWC_8192     0x0a00          /* Bandwidth:  8192 Bytes */
  42 #define MCFDMA_DCR_BWC_16384    0x0c00          /* Bandwidth: 16384 Bytes */
  43 #define MCFDMA_DCR_BWC_32768    0x0e00          /* Bandwidth: 32768 Bytes */
  44 #define MCFDMA_DCR_SAA          0x0100          /* Single Address Access */
  45 #define MCFDMA_DCR_S_RW         0x0080          /* SAA read/write value */
  46 #define MCFDMA_DCR_SINC         0x0040          /* Source addr inc enable */
  47 #define MCFDMA_DCR_SSIZE_MASK   0x0030          /* Src xfer size */
  48 #define MCFDMA_DCR_SSIZE_LONG   0x0000          /* Src xfer size, 00 = longw */
  49 #define MCFDMA_DCR_SSIZE_BYTE   0x0010          /* Src xfer size, 01 = byte */
  50 #define MCFDMA_DCR_SSIZE_WORD   0x0020          /* Src xfer size, 10 = word */
  51 #define MCFDMA_DCR_SSIZE_LINE   0x0030          /* Src xfer size, 11 = line */
  52 #define MCFDMA_DCR_DINC         0x0008          /* Dest addr inc enable */
  53 #define MCFDMA_DCR_DSIZE_MASK   0x0006          /* Dest xfer size */
  54 #define MCFDMA_DCR_DSIZE_LONG   0x0000          /* Dest xfer size, 00 = long */
  55 #define MCFDMA_DCR_DSIZE_BYTE   0x0002          /* Dest xfer size, 01 = byte */
  56 #define MCFDMA_DCR_DSIZE_WORD   0x0004          /* Dest xfer size, 10 = word */
  57 #define MCFDMA_DCR_DSIZE_LINE   0x0006          /* Dest xfer size, 11 = line */
  58 #define MCFDMA_DCR_START        0x0001          /* Start transfer */
  59
  60 /*
  61  *      Bit definitions for the DMA Status Register (DSR).
  62  */
  63 #define MCFDMA_DSR_CE           0x40            /* Config error */
  64 #define MCFDMA_DSR_BES          0x20            /* Bus Error on source */
  65 #define MCFDMA_DSR_BED          0x10            /* Bus Error on dest */
  66 #define MCFDMA_DSR_REQ          0x04            /* Requests remaining */
  67 #define MCFDMA_DSR_BSY          0x02            /* Busy */
  68 #define MCFDMA_DSR_DONE         0x01            /* DMA transfer complete */
  69
  70 #else /* This is an MCF5272 */
  71
  72 #define MCFDMA_DMR        0x00    /* Mode Register (r/w) */
  73 #define MCFDMA_DIR        0x03    /* Interrupt trigger register (r/w) */
  74 #define MCFDMA_DSAR       0x03    /* Source Address register (r/w) */
  75 #define MCFDMA_DDAR       0x04    /* Destination Address register (r/w) */
  76 #define MCFDMA_DBCR       0x02    /* Byte Count Register (r/w) */
  77
  78 /* Bit definitions for the DMA Mode Register (DMR) */
  79 #define MCFDMA_DMR_RESET     0x80000000L /* Reset bit */
  80 #define MCFDMA_DMR_EN        0x40000000L /* DMA enable */
  81 #define MCFDMA_DMR_RQM       0x000C0000L /* Request Mode Mask */
  82 #define MCFDMA_DMR_RQM_DUAL  0x000C0000L /* Dual address mode, the only valid mode */
  83 #define MCFDMA_DMR_DSTM      0x00002000L /* Destination addressing mask */
  84 #define MCFDMA_DMR_DSTM_SA   0x00000000L /* Destination uses static addressing */
  85 #define MCFDMA_DMR_DSTM_IA   0x00002000L /* Destination uses incremental addressing */
  86 #define MCFDMA_DMR_DSTT_UD   0x00000400L /* Destination is user data */
  87 #define MCFDMA_DMR_DSTT_UC   0x00000800L /* Destination is user code */
  88 #define MCFDMA_DMR_DSTT_SD   0x00001400L /* Destination is supervisor data */
  89 #define MCFDMA_DMR_DSTT_SC   0x00001800L /* Destination is supervisor code */
  90 #define MCFDMA_DMR_DSTS_OFF  0x8         /* offset to the destination size bits */
  91 #define MCFDMA_DMR_DSTS_LONG 0x00000000L /* Long destination size */
  92 #define MCFDMA_DMR_DSTS_BYTE 0x00000100L /* Byte destination size */
  93 #define MCFDMA_DMR_DSTS_WORD 0x00000200L /* Word destination size */
  94 #define MCFDMA_DMR_DSTS_LINE 0x00000300L /* Line destination size */
  95 #define MCFDMA_DMR_SRCM      0x00000020L /* Source addressing mask */
  96 #define MCFDMA_DMR_SRCM_SA   0x00000000L /* Source uses static addressing */
  97 #define MCFDMA_DMR_SRCM_IA   0x00000020L /* Source uses incremental addressing */
  98 #define MCFDMA_DMR_SRCT_UD   0x00000004L /* Source is user data */
  99 #define MCFDMA_DMR_SRCT_UC   0x00000008L /* Source is user code */
 100 #define MCFDMA_DMR_SRCT_SD   0x00000014L /* Source is supervisor data */
 101 #define MCFDMA_DMR_SRCT_SC   0x00000018L /* Source is supervisor code */
 102 #define MCFDMA_DMR_SRCS_OFF  0x0         /* Offset to the source size bits */
 103 #define MCFDMA_DMR_SRCS_LONG 0x00000000L /* Long source size */
 104 #define MCFDMA_DMR_SRCS_BYTE 0x00000001L /* Byte source size */
 105 #define MCFDMA_DMR_SRCS_WORD 0x00000002L /* Word source size */
 106 #define MCFDMA_DMR_SRCS_LINE 0x00000003L /* Line source size */
 107
 108 /* Bit definitions for the DMA interrupt register (DIR) */
 109 #define MCFDMA_DIR_INVEN     0x1000 /* Invalid Combination interrupt enable */
 110 #define MCFDMA_DIR_ASCEN     0x0800 /* Address Sequence Complete (Completion) interrupt enable */
 111 #define MCFDMA_DIR_TEEN      0x0200 /* Transfer Error interrupt enable */
 112 #define MCFDMA_DIR_TCEN      0x0100 /* Transfer Complete (a bus transfer, that is) interrupt enable */
 113 #define MCFDMA_DIR_INV       0x0010 /* Invalid Combination */
 114 #define MCFDMA_DIR_ASC       0x0008 /* Address Sequence Complete (DMA Completion) */
 115 #define MCFDMA_DIR_TE        0x0002 /* Transfer Error */
 116 #define MCFDMA_DIR_TC        0x0001 /* Transfer Complete */
 117
 118 #endif /* !defined(CONFIG_M5272) */
 119
 120 /****************************************************************************/
 121 #endif  /* mcfdma_h */