mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
66 lines
1.2 KiB
66 lines
1.2 KiB
/* SPDX-License-Identifier: GPL-2.0 |
|
* |
|
* Migo-R sdram self/auto-refresh setup code |
|
* |
|
* Copyright (C) 2009 Magnus Damm |
|
*/ |
|
|
|
#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)
|
|
|