162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci * 362306a36Sopenharmony_ci * MS7724SE 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(ms7724se_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(ms7724se_sdram_enter_end) 3362306a36Sopenharmony_ci 3462306a36Sopenharmony_ci .balign 4 3562306a36Sopenharmony_ciENTRY(ms7724se_sdram_leave_start) 3662306a36Sopenharmony_ci 3762306a36Sopenharmony_ci /* DBSC: put memory in auto-refresh mode */ 3862306a36Sopenharmony_ci 3962306a36Sopenharmony_ci mov.l @(SH_SLEEP_MODE, r5), r0 4062306a36Sopenharmony_ci tst #SUSP_SH_RSTANDBY, r0 4162306a36Sopenharmony_ci bf resume_rstandby 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 /* CPG: setup clocks before restarting external memory */ 5662306a36Sopenharmony_ci 5762306a36Sopenharmony_ci ED 0xA4150024, 0x00004000 /* PLLCR */ 5862306a36Sopenharmony_ci 5962306a36Sopenharmony_ci mov.l FRQCRA,r0 6062306a36Sopenharmony_ci mov.l @r0,r3 6162306a36Sopenharmony_ci mov.l KICK,r1 6262306a36Sopenharmony_ci or r1, r3 6362306a36Sopenharmony_ci mov.l r3, @r0 6462306a36Sopenharmony_ci 6562306a36Sopenharmony_ci mov.l LSTATS,r0 6662306a36Sopenharmony_ci mov #1,r1 6762306a36Sopenharmony_ciWAIT_LSTATS: 6862306a36Sopenharmony_ci mov.l @r0,r3 6962306a36Sopenharmony_ci tst r1,r3 7062306a36Sopenharmony_ci bf WAIT_LSTATS 7162306a36Sopenharmony_ci 7262306a36Sopenharmony_ci /* DBSC: re-initialize and put in auto-refresh */ 7362306a36Sopenharmony_ci 7462306a36Sopenharmony_ci ED 0xFD000108, 0x00000181 /* DBPDCNT0 */ 7562306a36Sopenharmony_ci ED 0xFD000020, 0x015B0002 /* DBCONF */ 7662306a36Sopenharmony_ci ED 0xFD000030, 0x03071502 /* DBTR0 */ 7762306a36Sopenharmony_ci ED 0xFD000034, 0x02020102 /* DBTR1 */ 7862306a36Sopenharmony_ci ED 0xFD000038, 0x01090405 /* DBTR2 */ 7962306a36Sopenharmony_ci ED 0xFD00003C, 0x00000002 /* DBTR3 */ 8062306a36Sopenharmony_ci ED 0xFD000008, 0x00000005 /* DBKIND */ 8162306a36Sopenharmony_ci ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ 8262306a36Sopenharmony_ci ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ 8362306a36Sopenharmony_ci ED 0xFD000018, 0x00000001 /* DBCKECNT */ 8462306a36Sopenharmony_ci 8562306a36Sopenharmony_ci mov #100,r0 8662306a36Sopenharmony_ciWAIT_400NS: 8762306a36Sopenharmony_ci dt r0 8862306a36Sopenharmony_ci bf WAIT_400NS 8962306a36Sopenharmony_ci 9062306a36Sopenharmony_ci ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 9162306a36Sopenharmony_ci ED 0xFD000060, 0x00020000 /* DBMRCNT (EMR2) */ 9262306a36Sopenharmony_ci ED 0xFD000060, 0x00030000 /* DBMRCNT (EMR3) */ 9362306a36Sopenharmony_ci ED 0xFD000060, 0x00010004 /* DBMRCNT (EMR) */ 9462306a36Sopenharmony_ci ED 0xFD000060, 0x00000532 /* DBMRCNT (MRS) */ 9562306a36Sopenharmony_ci ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 9662306a36Sopenharmony_ci ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 9762306a36Sopenharmony_ci ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 9862306a36Sopenharmony_ci ED 0xFD000060, 0x00000432 /* DBMRCNT (MRS) */ 9962306a36Sopenharmony_ci ED 0xFD000060, 0x000103c0 /* DBMRCNT (EMR) */ 10062306a36Sopenharmony_ci ED 0xFD000060, 0x00010040 /* DBMRCNT (EMR) */ 10162306a36Sopenharmony_ci 10262306a36Sopenharmony_ci mov #100,r0 10362306a36Sopenharmony_ciWAIT_400NS_2: 10462306a36Sopenharmony_ci dt r0 10562306a36Sopenharmony_ci bf WAIT_400NS_2 10662306a36Sopenharmony_ci 10762306a36Sopenharmony_ci ED 0xFD000010, 0x00000001 /* DBEN */ 10862306a36Sopenharmony_ci ED 0xFD000044, 0x0000050f /* DBRFPDN1 */ 10962306a36Sopenharmony_ci ED 0xFD000048, 0x236800e6 /* DBRFPDN2 */ 11062306a36Sopenharmony_ci 11162306a36Sopenharmony_ci mov.l DUMMY,r0 11262306a36Sopenharmony_ci mov.l @r0, r1 /* force single dummy read */ 11362306a36Sopenharmony_ci 11462306a36Sopenharmony_ci ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 11562306a36Sopenharmony_ci ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 11662306a36Sopenharmony_ci ED 0xFD000108, 0x00000080 /* DBPDCNT0 */ 11762306a36Sopenharmony_ci ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ 11862306a36Sopenharmony_ci 11962306a36Sopenharmony_ci rts 12062306a36Sopenharmony_ci nop 12162306a36Sopenharmony_ci 12262306a36Sopenharmony_ci .balign 4 12362306a36Sopenharmony_ciDUMMY: .long 0xac400000 12462306a36Sopenharmony_ciFRQCRA: .long 0xa4150000 12562306a36Sopenharmony_ciKICK: .long 0x80000000 12662306a36Sopenharmony_ciLSTATS: .long 0xa4150060 12762306a36Sopenharmony_ci 12862306a36Sopenharmony_ciENTRY(ms7724se_sdram_leave_end) 129