| wdenk | 983fda8 | 2004-10-28 00:09:35 +0000 | [diff] [blame^] | 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 */ |