1*4882a593Smuzhiyun/* SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun * 3*4882a593Smuzhiyun * KFR2R09 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(kfr2r09_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(kfr2r09_sdram_enter_end) 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun .balign 4 35*4882a593SmuzhiyunENTRY(kfr2r09_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 /* DBSC: re-initialize and put in auto-refresh */ 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun ED 0xFD000108, 0x40000301 /* DBPDCNT0 */ 58*4882a593Smuzhiyun ED 0xFD000020, 0x011B0002 /* DBCONF */ 59*4882a593Smuzhiyun ED 0xFD000030, 0x03060E02 /* DBTR0 */ 60*4882a593Smuzhiyun ED 0xFD000034, 0x01020102 /* DBTR1 */ 61*4882a593Smuzhiyun ED 0xFD000038, 0x01090406 /* DBTR2 */ 62*4882a593Smuzhiyun ED 0xFD000008, 0x00000004 /* DBKIND */ 63*4882a593Smuzhiyun ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ 64*4882a593Smuzhiyun ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ 65*4882a593Smuzhiyun ED 0xFD000018, 0x00000001 /* DBCKECNT */ 66*4882a593Smuzhiyun WAIT 1 67*4882a593Smuzhiyun ED 0xFD000010, 0x00000001 /* DBEN */ 68*4882a593Smuzhiyun ED 0xFD000044, 0x000004AF /* DBRFPDN1 */ 69*4882a593Smuzhiyun ED 0xFD000048, 0x20CF0037 /* DBRFPDN2 */ 70*4882a593Smuzhiyun ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 71*4882a593Smuzhiyun ED 0xFD000108, 0x40000300 /* DBPDCNT0 */ 72*4882a593Smuzhiyun ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ 73*4882a593Smuzhiyun 74*4882a593Smuzhiyun rts 75*4882a593Smuzhiyun nop 76*4882a593Smuzhiyun 77*4882a593SmuzhiyunENTRY(kfr2r09_sdram_leave_end) 78