1/* 2 * KFR2R09 sdram self/auto-refresh setup code 3 * 4 * Copyright (C) 2009 Magnus Damm 5 * 6 * This file is subject to the terms and conditions of the GNU General Public 7 * License. See the file "COPYING" in the main directory of this archive 8 * for more details. 9 */ 10 11#include <linux/sys.h> 12#include <linux/errno.h> 13#include <linux/linkage.h> 14#include <asm/asm-offsets.h> 15#include <asm/suspend.h> 16#include <asm/romimage-macros.h> 17 18/* code to enter and leave self-refresh. must be self-contained. 19 * this code will be copied to on-chip memory and executed from there. 20 */ 21 .balign 4 22ENTRY(kfr2r09_sdram_enter_start) 23 24 /* DBSC: put memory in self-refresh mode */ 25 26 ED 0xFD000010, 0x00000000 /* DBEN */ 27 ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ 28 ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 29 ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 30 ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ 31 32 rts 33 nop 34 35ENTRY(kfr2r09_sdram_enter_end) 36 37 .balign 4 38ENTRY(kfr2r09_sdram_leave_start) 39 40 /* DBSC: put memory in auto-refresh mode */ 41 42 mov.l @(SH_SLEEP_MODE, r5), r0 43 tst #SUSP_SH_RSTANDBY, r0 44 bf resume_rstandby 45 46 ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ 47 WAIT 1 48 ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 49 ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 50 ED 0xFD000010, 0x00000001 /* DBEN */ 51 ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ 52 53 rts 54 nop 55 56resume_rstandby: 57 58 /* DBSC: re-initialize and put in auto-refresh */ 59 60 ED 0xFD000108, 0x40000301 /* DBPDCNT0 */ 61 ED 0xFD000020, 0x011B0002 /* DBCONF */ 62 ED 0xFD000030, 0x03060E02 /* DBTR0 */ 63 ED 0xFD000034, 0x01020102 /* DBTR1 */ 64 ED 0xFD000038, 0x01090406 /* DBTR2 */ 65 ED 0xFD000008, 0x00000004 /* DBKIND */ 66 ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ 67 ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ 68 ED 0xFD000018, 0x00000001 /* DBCKECNT */ 69 WAIT 1 70 ED 0xFD000010, 0x00000001 /* DBEN */ 71 ED 0xFD000044, 0x000004AF /* DBRFPDN1 */ 72 ED 0xFD000048, 0x20CF0037 /* DBRFPDN2 */ 73 ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 74 ED 0xFD000108, 0x40000300 /* DBPDCNT0 */ 75 ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ 76 77 rts 78 nop 79 80ENTRY(kfr2r09_sdram_leave_end) 81