1*4882a593Smuzhiyun/* SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun * 3*4882a593Smuzhiyun * Ecovec24 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(ecovec24_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(ecovec24_sdram_enter_end) 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun .balign 4 35*4882a593SmuzhiyunENTRY(ecovec24_sdram_leave_start) 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun mov.l @(SH_SLEEP_MODE, r5), r0 38*4882a593Smuzhiyun tst #SUSP_SH_RSTANDBY, r0 39*4882a593Smuzhiyun bf resume_rstandby 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun /* DBSC: put memory in auto-refresh mode */ 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 /* DBSC: re-initialize and put in auto-refresh */ 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun ED 0xFD000108, 0x00000181 /* DBPDCNT0 */ 58*4882a593Smuzhiyun ED 0xFD000020, 0x015B0002 /* DBCONF */ 59*4882a593Smuzhiyun ED 0xFD000030, 0x03071502 /* DBTR0 */ 60*4882a593Smuzhiyun ED 0xFD000034, 0x02020102 /* DBTR1 */ 61*4882a593Smuzhiyun ED 0xFD000038, 0x01090405 /* DBTR2 */ 62*4882a593Smuzhiyun ED 0xFD00003C, 0x00000002 /* DBTR3 */ 63*4882a593Smuzhiyun ED 0xFD000008, 0x00000005 /* DBKIND */ 64*4882a593Smuzhiyun ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ 65*4882a593Smuzhiyun ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ 66*4882a593Smuzhiyun ED 0xFD000018, 0x00000001 /* DBCKECNT */ 67*4882a593Smuzhiyun 68*4882a593Smuzhiyun mov #100,r0 69*4882a593SmuzhiyunWAIT_400NS: 70*4882a593Smuzhiyun dt r0 71*4882a593Smuzhiyun bf WAIT_400NS 72*4882a593Smuzhiyun 73*4882a593Smuzhiyun ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 74*4882a593Smuzhiyun ED 0xFD000060, 0x00020000 /* DBMRCNT (EMR2) */ 75*4882a593Smuzhiyun ED 0xFD000060, 0x00030000 /* DBMRCNT (EMR3) */ 76*4882a593Smuzhiyun ED 0xFD000060, 0x00010004 /* DBMRCNT (EMR) */ 77*4882a593Smuzhiyun ED 0xFD000060, 0x00000532 /* DBMRCNT (MRS) */ 78*4882a593Smuzhiyun ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 79*4882a593Smuzhiyun ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 80*4882a593Smuzhiyun ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 81*4882a593Smuzhiyun ED 0xFD000060, 0x00000432 /* DBMRCNT (MRS) */ 82*4882a593Smuzhiyun ED 0xFD000060, 0x000103c0 /* DBMRCNT (EMR) */ 83*4882a593Smuzhiyun ED 0xFD000060, 0x00010040 /* DBMRCNT (EMR) */ 84*4882a593Smuzhiyun 85*4882a593Smuzhiyun mov #100,r0 86*4882a593SmuzhiyunWAIT_400NS_2: 87*4882a593Smuzhiyun dt r0 88*4882a593Smuzhiyun bf WAIT_400NS_2 89*4882a593Smuzhiyun 90*4882a593Smuzhiyun ED 0xFD000010, 0x00000001 /* DBEN */ 91*4882a593Smuzhiyun ED 0xFD000044, 0x0000050f /* DBRFPDN1 */ 92*4882a593Smuzhiyun ED 0xFD000048, 0x236800e6 /* DBRFPDN2 */ 93*4882a593Smuzhiyun 94*4882a593Smuzhiyun mov.l DUMMY,r0 95*4882a593Smuzhiyun mov.l @r0, r1 /* force single dummy read */ 96*4882a593Smuzhiyun 97*4882a593Smuzhiyun ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 98*4882a593Smuzhiyun ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 99*4882a593Smuzhiyun ED 0xFD000108, 0x00000080 /* DBPDCNT0 */ 100*4882a593Smuzhiyun ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ 101*4882a593Smuzhiyun 102*4882a593Smuzhiyun rts 103*4882a593Smuzhiyun nop 104*4882a593Smuzhiyun 105*4882a593Smuzhiyun .balign 4 106*4882a593SmuzhiyunDUMMY: .long 0xac400000 107*4882a593Smuzhiyun 108*4882a593SmuzhiyunENTRY(ecovec24_sdram_leave_end) 109