1eb0cd9e8SMagnus Damm/* 2eb0cd9e8SMagnus Damm * Ecovec24 sdram self/auto-refresh setup code 3eb0cd9e8SMagnus Damm * 4eb0cd9e8SMagnus Damm * Copyright (C) 2009 Magnus Damm 5eb0cd9e8SMagnus Damm * 6eb0cd9e8SMagnus Damm * This file is subject to the terms and conditions of the GNU General Public 7eb0cd9e8SMagnus Damm * License. See the file "COPYING" in the main directory of this archive 8eb0cd9e8SMagnus Damm * for more details. 9eb0cd9e8SMagnus Damm */ 10eb0cd9e8SMagnus Damm 11eb0cd9e8SMagnus Damm#include <linux/sys.h> 12eb0cd9e8SMagnus Damm#include <linux/errno.h> 13eb0cd9e8SMagnus Damm#include <linux/linkage.h> 14eb0cd9e8SMagnus Damm#include <asm/asm-offsets.h> 15eb0cd9e8SMagnus Damm#include <asm/suspend.h> 16eb0cd9e8SMagnus Damm#include <asm/romimage-macros.h> 17eb0cd9e8SMagnus Damm 18eb0cd9e8SMagnus Damm/* code to enter and leave self-refresh. must be self-contained. 19eb0cd9e8SMagnus Damm * this code will be copied to on-chip memory and executed from there. 20eb0cd9e8SMagnus Damm */ 21eb0cd9e8SMagnus Damm .balign 4 22eb0cd9e8SMagnus DammENTRY(ecovec24_sdram_enter_start) 23eb0cd9e8SMagnus Damm 24eb0cd9e8SMagnus Damm /* DBSC: put memory in self-refresh mode */ 25eb0cd9e8SMagnus Damm 26eb0cd9e8SMagnus Damm ED 0xFD000010, 0x00000000 /* DBEN */ 27eb0cd9e8SMagnus Damm ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ 28eb0cd9e8SMagnus Damm ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 29eb0cd9e8SMagnus Damm ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 30eb0cd9e8SMagnus Damm ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ 31eb0cd9e8SMagnus Damm 32eb0cd9e8SMagnus Damm rts 33eb0cd9e8SMagnus Damm nop 34eb0cd9e8SMagnus Damm 35eb0cd9e8SMagnus DammENTRY(ecovec24_sdram_enter_end) 36eb0cd9e8SMagnus Damm 37eb0cd9e8SMagnus Damm .balign 4 38eb0cd9e8SMagnus DammENTRY(ecovec24_sdram_leave_start) 39eb0cd9e8SMagnus Damm 40*2839bd61SMagnus Damm mov.l @(SH_SLEEP_MODE, r5), r0 41*2839bd61SMagnus Damm tst #SUSP_SH_RSTANDBY, r0 42*2839bd61SMagnus Damm bf resume_rstandby 43*2839bd61SMagnus Damm 44eb0cd9e8SMagnus Damm /* DBSC: put memory in auto-refresh mode */ 45eb0cd9e8SMagnus Damm 46eb0cd9e8SMagnus Damm ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ 47eb0cd9e8SMagnus Damm WAIT 1 48eb0cd9e8SMagnus Damm ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 49eb0cd9e8SMagnus Damm ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 50eb0cd9e8SMagnus Damm ED 0xFD000010, 0x00000001 /* DBEN */ 51eb0cd9e8SMagnus Damm ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ 52eb0cd9e8SMagnus Damm 53eb0cd9e8SMagnus Damm rts 54eb0cd9e8SMagnus Damm nop 55eb0cd9e8SMagnus Damm 56*2839bd61SMagnus Dammresume_rstandby: 57*2839bd61SMagnus Damm 58*2839bd61SMagnus Damm /* DBSC: re-initialize and put in auto-refresh */ 59*2839bd61SMagnus Damm 60*2839bd61SMagnus Damm ED 0xFD000108, 0x00000181 /* DBPDCNT0 */ 61*2839bd61SMagnus Damm ED 0xFD000020, 0x015B0002 /* DBCONF */ 62*2839bd61SMagnus Damm ED 0xFD000030, 0x03071502 /* DBTR0 */ 63*2839bd61SMagnus Damm ED 0xFD000034, 0x02020102 /* DBTR1 */ 64*2839bd61SMagnus Damm ED 0xFD000038, 0x01090405 /* DBTR2 */ 65*2839bd61SMagnus Damm ED 0xFD00003C, 0x00000002 /* DBTR3 */ 66*2839bd61SMagnus Damm ED 0xFD000008, 0x00000005 /* DBKIND */ 67*2839bd61SMagnus Damm ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ 68*2839bd61SMagnus Damm ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ 69*2839bd61SMagnus Damm ED 0xFD000018, 0x00000001 /* DBCKECNT */ 70*2839bd61SMagnus Damm 71*2839bd61SMagnus Damm mov #100,r0 72*2839bd61SMagnus DammWAIT_400NS: 73*2839bd61SMagnus Damm dt r0 74*2839bd61SMagnus Damm bf WAIT_400NS 75*2839bd61SMagnus Damm 76*2839bd61SMagnus Damm ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 77*2839bd61SMagnus Damm ED 0xFD000060, 0x00020000 /* DBMRCNT (EMR2) */ 78*2839bd61SMagnus Damm ED 0xFD000060, 0x00030000 /* DBMRCNT (EMR3) */ 79*2839bd61SMagnus Damm ED 0xFD000060, 0x00010004 /* DBMRCNT (EMR) */ 80*2839bd61SMagnus Damm ED 0xFD000060, 0x00000532 /* DBMRCNT (MRS) */ 81*2839bd61SMagnus Damm ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 82*2839bd61SMagnus Damm ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 83*2839bd61SMagnus Damm ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 84*2839bd61SMagnus Damm ED 0xFD000060, 0x00000432 /* DBMRCNT (MRS) */ 85*2839bd61SMagnus Damm ED 0xFD000060, 0x000103c0 /* DBMRCNT (EMR) */ 86*2839bd61SMagnus Damm ED 0xFD000060, 0x00010040 /* DBMRCNT (EMR) */ 87*2839bd61SMagnus Damm 88*2839bd61SMagnus Damm mov #100,r0 89*2839bd61SMagnus DammWAIT_400NS_2: 90*2839bd61SMagnus Damm dt r0 91*2839bd61SMagnus Damm bf WAIT_400NS_2 92*2839bd61SMagnus Damm 93*2839bd61SMagnus Damm ED 0xFD000010, 0x00000001 /* DBEN */ 94*2839bd61SMagnus Damm ED 0xFD000044, 0x0000050f /* DBRFPDN1 */ 95*2839bd61SMagnus Damm ED 0xFD000048, 0x236800e6 /* DBRFPDN2 */ 96*2839bd61SMagnus Damm 97*2839bd61SMagnus Damm mov.l DUMMY,r0 98*2839bd61SMagnus Damm mov.l @r0, r1 /* force single dummy read */ 99*2839bd61SMagnus Damm 100*2839bd61SMagnus Damm ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 101*2839bd61SMagnus Damm ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 102*2839bd61SMagnus Damm ED 0xFD000108, 0x00000080 /* DBPDCNT0 */ 103*2839bd61SMagnus Damm ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ 104*2839bd61SMagnus Damm 105*2839bd61SMagnus Damm rts 106*2839bd61SMagnus Damm nop 107*2839bd61SMagnus Damm 108*2839bd61SMagnus Damm .balign 4 109*2839bd61SMagnus DammDUMMY: .long 0xac400000 110*2839bd61SMagnus Damm 111eb0cd9e8SMagnus DammENTRY(ecovec24_sdram_leave_end) 112