mirror of
https://github.com/torvalds/linux.git
synced 2024-11-01 17:51:43 +00:00
13fa551b5e
Add self-refresh handling code for the Migo-R board. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
70 lines
1.3 KiB
ArmAsm
70 lines
1.3 KiB
ArmAsm
/*
|
|
* Migo-R 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(migor_sdram_enter_start)
|
|
|
|
/* SBSC: disable power down and put in self-refresh mode */
|
|
mov.l 1f, r4
|
|
mov.l 2f, r1
|
|
mov.l @r4, r2
|
|
or r1, r2
|
|
mov.l 3f, r3
|
|
and r3, r2
|
|
mov.l r2, @r4
|
|
|
|
rts
|
|
nop
|
|
|
|
.balign 4
|
|
1: .long 0xfe400008 /* SDCR0 */
|
|
2: .long 0x00000400
|
|
3: .long 0xffff7fff
|
|
ENTRY(migor_sdram_enter_end)
|
|
|
|
.balign 4
|
|
ENTRY(migor_sdram_leave_start)
|
|
|
|
/* SBSC: set auto-refresh mode */
|
|
mov.l 1f, r4
|
|
mov.l @r4, r0
|
|
mov.l 4f, r1
|
|
and r1, r0
|
|
mov.l r0, @r4
|
|
mov.l 6f, r4
|
|
mov.l 8f, r0
|
|
mov.l @r4, r1
|
|
mov #-1, r4
|
|
add r4, r1
|
|
or r1, r0
|
|
mov.l 7f, r1
|
|
mov.l r0, @r1
|
|
|
|
rts
|
|
nop
|
|
|
|
.balign 4
|
|
1: .long 0xfe400008 /* SDCR0 */
|
|
4: .long 0xfffffbff
|
|
6: .long 0xfe40001c /* RTCOR */
|
|
7: .long 0xfe400018 /* RTCNT */
|
|
8: .long 0xa55a0000
|
|
ENTRY(migor_sdram_leave_end)
|