release/src-rt-6.x.4708/linux/linux-2.6.36/arch/mips/include/asm/mach-rc32434/dma.h

   1 /*
   2  * Copyright 2002 Integrated Device Technology, Inc.
   3  *              All rights reserved.
   4  *
   5  * DMA register definition.
   6  *
   7  * Author : ryan.holmQVist@idt.com
   8  * Date   : 20011005
   9  */
  10
  11 #ifndef __ASM_RC32434_DMA_H
  12 #define __ASM_RC32434_DMA_H
  13
  14 #include <asm/mach-rc32434/rb.h>
  15
  16 #define DMA0_BASE_ADDR                  0x18040000
  17
  18 /*
  19  * DMA descriptor (in physical memory).
  20  */
  21
  22 struct dma_desc {
  23         u32 control;                    /* Control. use DMAD_* */
  24         u32 ca;                         /* Current Address. */
  25         u32 devcs;                      /* Device control and status. */
  26         u32 link;                       /* Next descriptor in chain. */
  27 };
  28
  29 #define DMA_DESC_SIZ                    sizeof(struct dma_desc)
  30 #define DMA_DESC_COUNT_BIT              0
  31 #define DMA_DESC_COUNT_MSK              0x0003ffff
  32 #define DMA_DESC_DS_BIT                 20
  33 #define DMA_DESC_DS_MSK                 0x00300000
  34
  35 #define DMA_DESC_DEV_CMD_BIT            22
  36 #define DMA_DESC_DEV_CMD_MSK            0x01c00000
  37
  38 /* DMA command sizes */
  39 #define DMA_DESC_DEV_CMD_BYTE           0
  40 #define DMA_DESC_DEV_CMD_HLF_WD         1
  41 #define DMA_DESC_DEV_CMD_WORD           2
  42 #define DMA_DESC_DEV_CMD_2WORDS         3
  43 #define DMA_DESC_DEV_CMD_4WORDS         4
  44 #define DMA_DESC_DEV_CMD_6WORDS         5
  45 #define DMA_DESC_DEV_CMD_8WORDS         6
  46 #define DMA_DESC_DEV_CMD_16WORDS        7
  47
  48 /* DMA descriptors interrupts */
  49 #define DMA_DESC_COF                    (1 << 25) /* Chain on finished */
  50 #define DMA_DESC_COD                    (1 << 26) /* Chain on done */
  51 #define DMA_DESC_IOF                    (1 << 27) /* Interrupt on finished */
  52 #define DMA_DESC_IOD                    (1 << 28) /* Interrupt on done */
  53 #define DMA_DESC_TERM                   (1 << 29) /* Terminated */
  54 #define DMA_DESC_DONE                   (1 << 30) /* Done */
  55 #define DMA_DESC_FINI                   (1 << 31) /* Finished */
  56
  57 /*
  58  * DMA register (within Internal Register Map).
  59  */
  60
  61 struct dma_reg {
  62         u32 dmac;               /* Control. */
  63         u32 dmas;               /* Status. */
  64         u32 dmasm;              /* Mask. */
  65         u32 dmadptr;            /* Descriptor pointer. */
  66         u32 dmandptr;           /* Next descriptor pointer. */
  67 };
  68
  69 /* DMA channels specific registers */
  70 #define DMA_CHAN_RUN_BIT                (1 << 0)
  71 #define DMA_CHAN_DONE_BIT               (1 << 1)
  72 #define DMA_CHAN_MODE_BIT               (1 << 2)
  73 #define DMA_CHAN_MODE_MSK               0x0000000c
  74 #define  DMA_CHAN_MODE_AUTO             0
  75 #define  DMA_CHAN_MODE_BURST            1
  76 #define  DMA_CHAN_MODE_XFRT             2
  77 #define  DMA_CHAN_MODE_RSVD             3
  78 #define DMA_CHAN_ACT_BIT                (1 << 4)
  79
  80 /* DMA status registers */
  81 #define DMA_STAT_FINI                   (1 << 0)
  82 #define DMA_STAT_DONE                   (1 << 1)
  83 #define DMA_STAT_CHAIN                  (1 << 2)
  84 #define DMA_STAT_ERR                    (1 << 3)
  85 #define DMA_STAT_HALT                   (1 << 4)
  86
  87 /*
  88  * DMA channel definitions
  89  */
  90
  91 #define DMA_CHAN_ETH_RCV                0
  92 #define DMA_CHAN_ETH_XMT                1
  93 #define DMA_CHAN_MEM_TO_FIFO            2
  94 #define DMA_CHAN_FIFO_TO_MEM            3
  95 #define DMA_CHAN_PCI_TO_MEM             4
  96 #define DMA_CHAN_MEM_TO_PCI             5
  97 #define DMA_CHAN_COUNT                  6
  98
  99 struct dma_channel {
 100         struct dma_reg ch[DMA_CHAN_COUNT];
 101 };
 102
 103 #endif  /* __ASM_RC32434_DMA_H */