82 lines
1.8 KiB
ArmAsm
82 lines
1.8 KiB
ArmAsm
/*
|
|
* 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>
|
|
*
|
|
* 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 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
|