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/* SPDX-License-Identifier: GPL-2.0
*
* KFR2R09 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(kfr2r09_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(kfr2r09_sdram_enter_end)
.balign 4
ENTRY(kfr2r09_sdram_leave_start)
/* DBSC: put memory in auto-refresh mode */
mov.l @(SH_SLEEP_MODE, r5), r0
tst #SUSP_SH_RSTANDBY, r0
bf resume_rstandby
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
resume_rstandby:
/* DBSC: re-initialize and put in auto-refresh */
ED 0xFD000108, 0x40000301 /* DBPDCNT0 */
ED 0xFD000020, 0x011B0002 /* DBCONF */
ED 0xFD000030, 0x03060E02 /* DBTR0 */
ED 0xFD000034, 0x01020102 /* DBTR1 */
ED 0xFD000038, 0x01090406 /* DBTR2 */
ED 0xFD000008, 0x00000004 /* DBKIND */
ED 0xFD000040, 0x00000001 /* DBRFPDN0 */
ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
ED 0xFD000018, 0x00000001 /* DBCKECNT */
WAIT 1
ED 0xFD000010, 0x00000001 /* DBEN */
ED 0xFD000044, 0x000004AF /* DBRFPDN1 */
ED 0xFD000048, 0x20CF0037 /* DBRFPDN2 */
ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
ED 0xFD000108, 0x40000300 /* DBPDCNT0 */
ED 0xFD000040, 0x00010000 /* DBRFPDN0 */
rts
nop
ENTRY(kfr2r09_sdram_leave_end)
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