1*4882a593Smuzhiyun/* SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun * 3*4882a593Smuzhiyun * MS7724SE sdram self/auto-refresh setup code 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (C) 2009 Magnus Damm 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun#include <linux/sys.h> 9*4882a593Smuzhiyun#include <linux/errno.h> 10*4882a593Smuzhiyun#include <linux/linkage.h> 11*4882a593Smuzhiyun#include <asm/asm-offsets.h> 12*4882a593Smuzhiyun#include <asm/suspend.h> 13*4882a593Smuzhiyun#include <asm/romimage-macros.h> 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun/* code to enter and leave self-refresh. must be self-contained. 16*4882a593Smuzhiyun * this code will be copied to on-chip memory and executed from there. 17*4882a593Smuzhiyun */ 18*4882a593Smuzhiyun .balign 4 19*4882a593SmuzhiyunENTRY(ms7724se_sdram_enter_start) 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun /* DBSC: put memory in self-refresh mode */ 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun ED 0xFD000010, 0x00000000 /* DBEN */ 24*4882a593Smuzhiyun ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ 25*4882a593Smuzhiyun ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 26*4882a593Smuzhiyun ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 27*4882a593Smuzhiyun ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun rts 30*4882a593Smuzhiyun nop 31*4882a593Smuzhiyun 32*4882a593SmuzhiyunENTRY(ms7724se_sdram_enter_end) 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun .balign 4 35*4882a593SmuzhiyunENTRY(ms7724se_sdram_leave_start) 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun /* DBSC: put memory in auto-refresh mode */ 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun mov.l @(SH_SLEEP_MODE, r5), r0 40*4882a593Smuzhiyun tst #SUSP_SH_RSTANDBY, r0 41*4882a593Smuzhiyun bf resume_rstandby 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ 44*4882a593Smuzhiyun WAIT 1 45*4882a593Smuzhiyun ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 46*4882a593Smuzhiyun ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 47*4882a593Smuzhiyun ED 0xFD000010, 0x00000001 /* DBEN */ 48*4882a593Smuzhiyun ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun rts 51*4882a593Smuzhiyun nop 52*4882a593Smuzhiyun 53*4882a593Smuzhiyunresume_rstandby: 54*4882a593Smuzhiyun 55*4882a593Smuzhiyun /* CPG: setup clocks before restarting external memory */ 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun ED 0xA4150024, 0x00004000 /* PLLCR */ 58*4882a593Smuzhiyun 59*4882a593Smuzhiyun mov.l FRQCRA,r0 60*4882a593Smuzhiyun mov.l @r0,r3 61*4882a593Smuzhiyun mov.l KICK,r1 62*4882a593Smuzhiyun or r1, r3 63*4882a593Smuzhiyun mov.l r3, @r0 64*4882a593Smuzhiyun 65*4882a593Smuzhiyun mov.l LSTATS,r0 66*4882a593Smuzhiyun mov #1,r1 67*4882a593SmuzhiyunWAIT_LSTATS: 68*4882a593Smuzhiyun mov.l @r0,r3 69*4882a593Smuzhiyun tst r1,r3 70*4882a593Smuzhiyun bf WAIT_LSTATS 71*4882a593Smuzhiyun 72*4882a593Smuzhiyun /* DBSC: re-initialize and put in auto-refresh */ 73*4882a593Smuzhiyun 74*4882a593Smuzhiyun ED 0xFD000108, 0x00000181 /* DBPDCNT0 */ 75*4882a593Smuzhiyun ED 0xFD000020, 0x015B0002 /* DBCONF */ 76*4882a593Smuzhiyun ED 0xFD000030, 0x03071502 /* DBTR0 */ 77*4882a593Smuzhiyun ED 0xFD000034, 0x02020102 /* DBTR1 */ 78*4882a593Smuzhiyun ED 0xFD000038, 0x01090405 /* DBTR2 */ 79*4882a593Smuzhiyun ED 0xFD00003C, 0x00000002 /* DBTR3 */ 80*4882a593Smuzhiyun ED 0xFD000008, 0x00000005 /* DBKIND */ 81*4882a593Smuzhiyun ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ 82*4882a593Smuzhiyun ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ 83*4882a593Smuzhiyun ED 0xFD000018, 0x00000001 /* DBCKECNT */ 84*4882a593Smuzhiyun 85*4882a593Smuzhiyun mov #100,r0 86*4882a593SmuzhiyunWAIT_400NS: 87*4882a593Smuzhiyun dt r0 88*4882a593Smuzhiyun bf WAIT_400NS 89*4882a593Smuzhiyun 90*4882a593Smuzhiyun ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 91*4882a593Smuzhiyun ED 0xFD000060, 0x00020000 /* DBMRCNT (EMR2) */ 92*4882a593Smuzhiyun ED 0xFD000060, 0x00030000 /* DBMRCNT (EMR3) */ 93*4882a593Smuzhiyun ED 0xFD000060, 0x00010004 /* DBMRCNT (EMR) */ 94*4882a593Smuzhiyun ED 0xFD000060, 0x00000532 /* DBMRCNT (MRS) */ 95*4882a593Smuzhiyun ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 96*4882a593Smuzhiyun ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 97*4882a593Smuzhiyun ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 98*4882a593Smuzhiyun ED 0xFD000060, 0x00000432 /* DBMRCNT (MRS) */ 99*4882a593Smuzhiyun ED 0xFD000060, 0x000103c0 /* DBMRCNT (EMR) */ 100*4882a593Smuzhiyun ED 0xFD000060, 0x00010040 /* DBMRCNT (EMR) */ 101*4882a593Smuzhiyun 102*4882a593Smuzhiyun mov #100,r0 103*4882a593SmuzhiyunWAIT_400NS_2: 104*4882a593Smuzhiyun dt r0 105*4882a593Smuzhiyun bf WAIT_400NS_2 106*4882a593Smuzhiyun 107*4882a593Smuzhiyun ED 0xFD000010, 0x00000001 /* DBEN */ 108*4882a593Smuzhiyun ED 0xFD000044, 0x0000050f /* DBRFPDN1 */ 109*4882a593Smuzhiyun ED 0xFD000048, 0x236800e6 /* DBRFPDN2 */ 110*4882a593Smuzhiyun 111*4882a593Smuzhiyun mov.l DUMMY,r0 112*4882a593Smuzhiyun mov.l @r0, r1 /* force single dummy read */ 113*4882a593Smuzhiyun 114*4882a593Smuzhiyun ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 115*4882a593Smuzhiyun ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 116*4882a593Smuzhiyun ED 0xFD000108, 0x00000080 /* DBPDCNT0 */ 117*4882a593Smuzhiyun ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ 118*4882a593Smuzhiyun 119*4882a593Smuzhiyun rts 120*4882a593Smuzhiyun nop 121*4882a593Smuzhiyun 122*4882a593Smuzhiyun .balign 4 123*4882a593SmuzhiyunDUMMY: .long 0xac400000 124*4882a593SmuzhiyunFRQCRA: .long 0xa4150000 125*4882a593SmuzhiyunKICK: .long 0x80000000 126*4882a593SmuzhiyunLSTATS: .long 0xa4150060 127*4882a593Smuzhiyun 128*4882a593SmuzhiyunENTRY(ms7724se_sdram_leave_end) 129