arch/powerpc/cpu/mpc8220/dma.h

   1 /*
   2  * (C) Copyright 2003
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * This file is based on code
   6  * (C) Copyright Motorola, Inc., 2000
   7  *
   8  * MPC8220 dma header file
   9  */
  10
  11 #ifndef __MPC8220_DMA_H
  12 #define __MPC8220_DMA_H
  13
  14 #include <common.h>
  15 #include <mpc8220.h>
  16
  17 /* Task number assignment */
  18 #define FEC_RECV_TASK_NO            0
  19 #define FEC_XMIT_TASK_NO            1
  20
  21 /*---------------------------------------------------------------------
  22  * Stuff for Ethernet Tx/Rx tasks
  23  *---------------------------------------------------------------------
  24  */
  25
  26 /* Layout of Ethernet controller Parameter SRAM area:
  27  * ----------------------------------------------------------------
  28  * 0x00: TBD_BASE, base address of TX BD ring
  29  * 0x04: TBD_NEXT, address of next TX BD to be processed
  30  * 0x08: RBD_BASE, base address of RX BD ring
  31  * 0x0C: RBD_NEXT, address of next RX BD to be processed
  32  * ---------------------------------------------------------------
  33  * ALL PARAMETERS ARE ALL LONGWORDS (FOUR BYTES EACH).
  34  */
  35
  36 /* base address of SRAM area to store parameters used by Ethernet tasks */
  37 #define FEC_PARAM_BASE  (MMAP_SRAM + 0x5b00)
  38
  39 /* base address of SRAM area for buffer descriptors */
  40 #define FEC_BD_BASE     (MMAP_SRAM + 0x5b20)
  41
  42 /*---------------------------------------------------------------------
  43  * common shortcuts  used  by driver C code
  44  *---------------------------------------------------------------------
  45  */
  46
  47 /* Disable SmartDMA task */
  48 #define DMA_TASK_DISABLE(tasknum)                                               \
  49 {                                                                               \
  50         volatile ushort *tcr = (ushort *)(MMAP_DMA + 0x0000001c + 2 * tasknum); \
  51         *tcr = (*tcr) & (~0x8000);                                              \
  52 }
  53
  54 /* Enable SmartDMA task */
  55 #define DMA_TASK_ENABLE(tasknum)                                                \
  56 {                                                                               \
  57         volatile ushort *tcr = (ushort *) (MMAP_DMA + 0x0000001c + 2 * tasknum);\
  58         *tcr = (*tcr)  | 0x8000;                                                \
  59 }
  60
  61 /* Clear interrupt pending bits */
  62 #define DMA_CLEAR_IEVENT(tasknum)                                               \
  63 {                                                                               \
  64         struct mpc8220_dma *dma = (struct mpc8220_dma *)MMAP_DMA;               \
  65         dma->IntPend = (1 << tasknum);                                          \
  66 }
  67
  68 #endif  /* __MPC8220_DMA_H */