162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci * 362306a36Sopenharmony_ci * Ecovec24 sdram self/auto-refresh setup code 462306a36Sopenharmony_ci * 562306a36Sopenharmony_ci * Copyright (C) 2009 Magnus Damm 662306a36Sopenharmony_ci */ 762306a36Sopenharmony_ci 862306a36Sopenharmony_ci#include <linux/sys.h> 962306a36Sopenharmony_ci#include <linux/errno.h> 1062306a36Sopenharmony_ci#include <linux/linkage.h> 1162306a36Sopenharmony_ci#include <asm/asm-offsets.h> 1262306a36Sopenharmony_ci#include <asm/suspend.h> 1362306a36Sopenharmony_ci#include <asm/romimage-macros.h> 1462306a36Sopenharmony_ci 1562306a36Sopenharmony_ci/* code to enter and leave self-refresh. must be self-contained. 1662306a36Sopenharmony_ci * this code will be copied to on-chip memory and executed from there. 1762306a36Sopenharmony_ci */ 1862306a36Sopenharmony_ci .balign 4 1962306a36Sopenharmony_ciENTRY(ecovec24_sdram_enter_start) 2062306a36Sopenharmony_ci 2162306a36Sopenharmony_ci /* DBSC: put memory in self-refresh mode */ 2262306a36Sopenharmony_ci 2362306a36Sopenharmony_ci ED 0xFD000010, 0x00000000 /* DBEN */ 2462306a36Sopenharmony_ci ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ 2562306a36Sopenharmony_ci ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 2662306a36Sopenharmony_ci ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 2762306a36Sopenharmony_ci ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ 2862306a36Sopenharmony_ci 2962306a36Sopenharmony_ci rts 3062306a36Sopenharmony_ci nop 3162306a36Sopenharmony_ci 3262306a36Sopenharmony_ciENTRY(ecovec24_sdram_enter_end) 3362306a36Sopenharmony_ci 3462306a36Sopenharmony_ci .balign 4 3562306a36Sopenharmony_ciENTRY(ecovec24_sdram_leave_start) 3662306a36Sopenharmony_ci 3762306a36Sopenharmony_ci mov.l @(SH_SLEEP_MODE, r5), r0 3862306a36Sopenharmony_ci tst #SUSP_SH_RSTANDBY, r0 3962306a36Sopenharmony_ci bf resume_rstandby 4062306a36Sopenharmony_ci 4162306a36Sopenharmony_ci /* DBSC: put memory in auto-refresh mode */ 4262306a36Sopenharmony_ci 4362306a36Sopenharmony_ci ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ 4462306a36Sopenharmony_ci WAIT 1 4562306a36Sopenharmony_ci ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 4662306a36Sopenharmony_ci ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 4762306a36Sopenharmony_ci ED 0xFD000010, 0x00000001 /* DBEN */ 4862306a36Sopenharmony_ci ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ 4962306a36Sopenharmony_ci 5062306a36Sopenharmony_ci rts 5162306a36Sopenharmony_ci nop 5262306a36Sopenharmony_ci 5362306a36Sopenharmony_ciresume_rstandby: 5462306a36Sopenharmony_ci 5562306a36Sopenharmony_ci /* DBSC: re-initialize and put in auto-refresh */ 5662306a36Sopenharmony_ci 5762306a36Sopenharmony_ci ED 0xFD000108, 0x00000181 /* DBPDCNT0 */ 5862306a36Sopenharmony_ci ED 0xFD000020, 0x015B0002 /* DBCONF */ 5962306a36Sopenharmony_ci ED 0xFD000030, 0x03071502 /* DBTR0 */ 6062306a36Sopenharmony_ci ED 0xFD000034, 0x02020102 /* DBTR1 */ 6162306a36Sopenharmony_ci ED 0xFD000038, 0x01090405 /* DBTR2 */ 6262306a36Sopenharmony_ci ED 0xFD00003C, 0x00000002 /* DBTR3 */ 6362306a36Sopenharmony_ci ED 0xFD000008, 0x00000005 /* DBKIND */ 6462306a36Sopenharmony_ci ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ 6562306a36Sopenharmony_ci ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ 6662306a36Sopenharmony_ci ED 0xFD000018, 0x00000001 /* DBCKECNT */ 6762306a36Sopenharmony_ci 6862306a36Sopenharmony_ci mov #100,r0 6962306a36Sopenharmony_ciWAIT_400NS: 7062306a36Sopenharmony_ci dt r0 7162306a36Sopenharmony_ci bf WAIT_400NS 7262306a36Sopenharmony_ci 7362306a36Sopenharmony_ci ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 7462306a36Sopenharmony_ci ED 0xFD000060, 0x00020000 /* DBMRCNT (EMR2) */ 7562306a36Sopenharmony_ci ED 0xFD000060, 0x00030000 /* DBMRCNT (EMR3) */ 7662306a36Sopenharmony_ci ED 0xFD000060, 0x00010004 /* DBMRCNT (EMR) */ 7762306a36Sopenharmony_ci ED 0xFD000060, 0x00000532 /* DBMRCNT (MRS) */ 7862306a36Sopenharmony_ci ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 7962306a36Sopenharmony_ci ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 8062306a36Sopenharmony_ci ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 8162306a36Sopenharmony_ci ED 0xFD000060, 0x00000432 /* DBMRCNT (MRS) */ 8262306a36Sopenharmony_ci ED 0xFD000060, 0x000103c0 /* DBMRCNT (EMR) */ 8362306a36Sopenharmony_ci ED 0xFD000060, 0x00010040 /* DBMRCNT (EMR) */ 8462306a36Sopenharmony_ci 8562306a36Sopenharmony_ci mov #100,r0 8662306a36Sopenharmony_ciWAIT_400NS_2: 8762306a36Sopenharmony_ci dt r0 8862306a36Sopenharmony_ci bf WAIT_400NS_2 8962306a36Sopenharmony_ci 9062306a36Sopenharmony_ci ED 0xFD000010, 0x00000001 /* DBEN */ 9162306a36Sopenharmony_ci ED 0xFD000044, 0x0000050f /* DBRFPDN1 */ 9262306a36Sopenharmony_ci ED 0xFD000048, 0x236800e6 /* DBRFPDN2 */ 9362306a36Sopenharmony_ci 9462306a36Sopenharmony_ci mov.l DUMMY,r0 9562306a36Sopenharmony_ci mov.l @r0, r1 /* force single dummy read */ 9662306a36Sopenharmony_ci 9762306a36Sopenharmony_ci ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 9862306a36Sopenharmony_ci ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 9962306a36Sopenharmony_ci ED 0xFD000108, 0x00000080 /* DBPDCNT0 */ 10062306a36Sopenharmony_ci ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ 10162306a36Sopenharmony_ci 10262306a36Sopenharmony_ci rts 10362306a36Sopenharmony_ci nop 10462306a36Sopenharmony_ci 10562306a36Sopenharmony_ci .balign 4 10662306a36Sopenharmony_ciDUMMY: .long 0xac400000 10762306a36Sopenharmony_ci 10862306a36Sopenharmony_ciENTRY(ecovec24_sdram_leave_end) 109