| /* |
| * board/mx1ads/lowlevel_init.S |
| * |
| * (c) Copyright 2004 |
| * Techware Information Technology, Inc. |
| * http://www.techware.com.tw/ |
| * |
| * Ming-Len Wu <minglen_wu@techware.com.tw> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <config.h> |
| #include <version.h> |
| |
| #define SDCTL0 0x221000 |
| #define SDCTL1 0x221004 |
| |
| |
| _TEXT_BASE: |
| .word CONFIG_SYS_TEXT_BASE |
| |
| .globl lowlevel_init |
| lowlevel_init: |
| /* 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 |