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| /* 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)
|
|
