| /* |
| * board/mx1ads/memsetup.S |
| * |
| * (c) Copyright 2004 |
| * Techware Information Technology, Inc. |
| * http://www.techware.com.tw/ |
| * |
| * Ming-Len Wu <minglen_wu@techware.com.tw> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of |
| * the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| * MA 02111-1307 USA |
| */ |
| |
| #include <config.h> |
| #include <version.h> |
| |
| #define SDCTL0 0x221000 |
| #define SDCTL1 0x221004 |
| |
| |
| _TEXT_BASE: |
| .word TEXT_BASE |
| |
| .globl memsetup |
| memsetup: |
| /* memory controller init */ |
| |
| ldr r1, =SDCTL0 |
| |
| /* Set Precharge Command */ |
| |
| ldr r3, =0x92120200 |
| /* ldr r3, =0x92120251 |
| */ |
| str r3, [r1] |
| |
| /* Issue Precharge All Commad */ |
| ldr r3, =0x8200000 |
| ldr r2, [r3] |
| |
| /* Set AutoRefresh Command */ |
| ldr r3, =0xA2120200 |
| str r3, [r1] |
| |
| /* Issue AutoRefresh Command */ |
| ldr r3, =0x8000000 |
| ldr r2, [r3] |
| ldr r2, [r3] |
| ldr r2, [r3] |
| ldr r2, [r3] |
| ldr r2, [r3] |
| ldr r2, [r3] |
| ldr r2, [r3] |
| ldr r2, [r3] |
| |
| /* Set Mode Register */ |
| ldr r3, =0xB2120200 |
| str r3, [r1] |
| |
| /* Issue Mode Register Command */ |
| ldr r3, =0x08111800 /* Mode Register Value */ |
| ldr r2, [r3] |
| |
| /* Set Normal Mode */ |
| ldr r3, =0x82124200 |
| str r3, [r1] |
| |
| /* everything is fine now */ |
| mov pc, lr |
| |