1 /* SPDX-License-Identifier: GPL-2.0 2 * 3 * KFR2R09 sdram self/auto-refresh setup code 4 * 5 * Copyright (C) 2009 Magnus Damm 6 */ 7 8 #include <linux/sys.h> 9 #include <linux/errno.h> 10 #include <linux/linkage.h> 11 #include <asm/asm-offsets.h> 12 #include <asm/suspend.h> 13 #include <asm/romimage-macros.h> 14 15 /* code to enter and leave self-refresh. must be self-contained. 16 * this code will be copied to on-chip memory and executed from there. 17 */ 18 .balign 4 19 ENTRY(kfr2r09_sdram_enter_start) 20 21 /* DBSC: put memory in self-refresh mode */ 22 23 ED 0xFD000010, 0x00000000 /* DBEN */ 24 ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ 25 ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 26 ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 27 ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ 28 29 rts 30 nop 31 32 ENTRY(kfr2r09_sdram_enter_end) 33 34 .balign 4 35 ENTRY(kfr2r09_sdram_leave_start) 36 37 /* DBSC: put memory in auto-refresh mode */ 38 39 mov.l @(SH_SLEEP_MODE, r5), r0 40 tst #SUSP_SH_RSTANDBY, r0 41 bf resume_rstandby 42 43 ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ 44 WAIT 1 45 ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ 46 ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 47 ED 0xFD000010, 0x00000001 /* DBEN */ 48 ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ 49 50 rts 51 nop 52 53 resume_rstandby: 54 55 /* DBSC: re-initialize and put in auto-refresh */ 56 57 ED 0xFD000108, 0x40000301 /* DBPDCNT0 */ 58 ED 0xFD000020, 0x011B0002 /* DBCONF */ 59 ED 0xFD000030, 0x03060E02 /* DBTR0 */ 60 ED 0xFD000034, 0x01020102 /* DBTR1 */ 61 ED 0xFD000038, 0x01090406 /* DBTR2 */ 62 ED 0xFD000008, 0x00000004 /* DBKIND */ 63 ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ 64 ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ 65 ED 0xFD000018, 0x00000001 /* DBCKECNT */ 66 WAIT 1 67 ED 0xFD000010, 0x00000001 /* DBEN */ 68 ED 0xFD000044, 0x000004AF /* DBRFPDN1 */ 69 ED 0xFD000048, 0x20CF0037 /* DBRFPDN2 */ 70 ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ 71 ED 0xFD000108, 0x40000300 /* DBPDCNT0 */ 72 ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ 73 74 rts 75 nop 76 77 ENTRY(kfr2r09_sdram_leave_end) 78