53 lines
1.3 KiB
ArmAsm
53 lines
1.3 KiB
ArmAsm
|
/*
|
||
|
|
* MS7724SE sdram self/auto-refresh setup code
|
||
|
|
*
|
||
|
|
* Copyright (C) 2009 Magnus Damm
|
||
|
|
*
|
||
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
||
|
|
* License. See the file "COPYING" in the main directory of this archive
|
||
|
|
* for more details.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/sys.h>
|
||
|
|
#include <linux/errno.h>
|
||
|
|
#include <linux/linkage.h>
|
||
|
|
#include <asm/asm-offsets.h>
|
||
|
|
#include <asm/suspend.h>
|
||
|
|
#include <asm/romimage-macros.h>
|
||
|
|
|
||
|
|
/* code to enter and leave self-refresh. must be self-contained.
|
||
|
|
* this code will be copied to on-chip memory and executed from there.
|
||
|
|
*/
|
||
|
|
.balign 4
|
||
|
|
ENTRY(ms7724se_sdram_enter_start)
|
||
|
|
|
||
|
|
/* DBSC: put memory in self-refresh mode */
|
||
|
|
|
||
|
|
ED 0xFD000010, 0x00000000 /* DBEN */
|
||
|
|
ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
|
||
|
|
ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
|
||
|
|
ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
|
||
|
|
ED 0xFD000040, 0x00000001 /* DBRFPDN0 */
|
||
|
|
|
||
|
|
rts
|
||
|
|
nop
|
||
|
|
|
||
|
|
ENTRY(ms7724se_sdram_enter_end)
|
||
|
|
|
||
|
|
.balign 4
|
||
|
|
ENTRY(ms7724se_sdram_leave_start)
|
||
|
|
|
||
|
|
/* DBSC: put memory in auto-refresh mode */
|
||
|
|
|
||
|
|
ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
|
||
|
|
WAIT 1
|
||
|
|
ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
|
||
|
|
ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
|
||
|
|
ED 0xFD000010, 0x00000001 /* DBEN */
|
||
|
|
ED 0xFD000040, 0x00010000 /* DBRFPDN0 */
|
||
|
|
|
||
|
|
rts
|
||
|
|
nop
|
||
|
|
|
||
|
|
ENTRY(ms7724se_sdram_leave_end)
|