| /* SPDX-License-Identifier: GPL-2.0 |
| * |
| * KFR2R09 sdram self/auto-refresh setup code |
| * |
| * Copyright (C) 2009 Magnus Damm |
| */ |
| |
| #include <linux/sys.h> |
| #include <linux/errno.h> |
| #include <linux/linkage.h> |
| #include <asm/asm-offsets.h> |
| #include <asm/suspend.h> |
| #include <asm/romimage-macros.h> |
| |
| /* code to enter and leave self-refresh. must be self-contained. |
| * this code will be copied to on-chip memory and executed from there. |
| */ |
| .balign 4 |
| ENTRY(kfr2r09_sdram_enter_start) |
| |
| /* DBSC: put memory in self-refresh mode */ |
| |
| ED 0xFD000010, 0x00000000 /* DBEN */ |
| ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ |
| ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ |
| ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ |
| ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ |
| |
| rts |
| nop |
| |
| ENTRY(kfr2r09_sdram_enter_end) |
| |
| .balign 4 |
| ENTRY(kfr2r09_sdram_leave_start) |
| |
| /* DBSC: put memory in auto-refresh mode */ |
| |
| mov.l @(SH_SLEEP_MODE, r5), r0 |
| tst #SUSP_SH_RSTANDBY, r0 |
| bf resume_rstandby |
| |
| ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ |
| WAIT 1 |
| ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */ |
| ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ |
| ED 0xFD000010, 0x00000001 /* DBEN */ |
| ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ |
| |
| rts |
| nop |
| |
| resume_rstandby: |
| |
| /* DBSC: re-initialize and put in auto-refresh */ |
| |
| ED 0xFD000108, 0x40000301 /* DBPDCNT0 */ |
| ED 0xFD000020, 0x011B0002 /* DBCONF */ |
| ED 0xFD000030, 0x03060E02 /* DBTR0 */ |
| ED 0xFD000034, 0x01020102 /* DBTR1 */ |
| ED 0xFD000038, 0x01090406 /* DBTR2 */ |
| ED 0xFD000008, 0x00000004 /* DBKIND */ |
| ED 0xFD000040, 0x00000001 /* DBRFPDN0 */ |
| ED 0xFD000040, 0x00000000 /* DBRFPDN0 */ |
| ED 0xFD000018, 0x00000001 /* DBCKECNT */ |
| WAIT 1 |
| ED 0xFD000010, 0x00000001 /* DBEN */ |
| ED 0xFD000044, 0x000004AF /* DBRFPDN1 */ |
| ED 0xFD000048, 0x20CF0037 /* DBRFPDN2 */ |
| ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */ |
| ED 0xFD000108, 0x40000300 /* DBPDCNT0 */ |
| ED 0xFD000040, 0x00010000 /* DBRFPDN0 */ |
| |
| rts |
| nop |
| |
| ENTRY(kfr2r09_sdram_leave_end) |
