From 67e522d0f91349127b3e0e536578be484cdb3367 Mon Sep 17 00:00:00 2001 From: Magnus Damm Date: Thu, 29 Oct 2009 10:52:15 +0000 Subject: sh: Add kfr2r09 specific memory pre/post sleep code Add self-refresh handling code for the KFR2R09 board. Signed-off-by: Magnus Damm Signed-off-by: Paul Mundt --- arch/sh/boards/mach-kfr2r09/sdram.S | 52 +++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 arch/sh/boards/mach-kfr2r09/sdram.S (limited to 'arch/sh/boards/mach-kfr2r09/sdram.S') diff --git a/arch/sh/boards/mach-kfr2r09/sdram.S b/arch/sh/boards/mach-kfr2r09/sdram.S new file mode 100644 index 000000000000..4ce78fcf5674 --- /dev/null +++ b/arch/sh/boards/mach-kfr2r09/sdram.S @@ -0,0 +1,52 @@ +/* + * KFR2R09 sdram self/auto-refresh setup code + * + * Copyright (C) 2009 Magnus Damm + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include +#include +#include +#include +#include +#include + +/* 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 */ + + 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 + +ENTRY(kfr2r09_sdram_leave_end) -- cgit v1.2.2 From 58ee987e2fd8acff6263d194d8fa43267cc8b1c9 Mon Sep 17 00:00:00 2001 From: Magnus Damm Date: Fri, 30 Oct 2009 04:24:48 +0000 Subject: sh: Add KFR2R09 specific memory pre/post R-standby code Add R-standby support to the KFR2R09 sdram code. Signed-off-by: Magnus Damm Signed-off-by: Paul Mundt --- arch/sh/boards/mach-kfr2r09/sdram.S | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) (limited to 'arch/sh/boards/mach-kfr2r09/sdram.S') diff --git a/arch/sh/boards/mach-kfr2r09/sdram.S b/arch/sh/boards/mach-kfr2r09/sdram.S index 4ce78fcf5674..0c9f55bec2fe 100644 --- a/arch/sh/boards/mach-kfr2r09/sdram.S +++ b/arch/sh/boards/mach-kfr2r09/sdram.S @@ -39,6 +39,10 @@ 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) */ @@ -49,4 +53,28 @@ ENTRY(kfr2r09_sdram_leave_start) 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) -- cgit v1.2.2