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67e522d0f9
Add self-refresh handling code for the KFR2R09 board. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
52 lines
1.3 KiB
ArmAsm
52 lines
1.3 KiB
ArmAsm
/*
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* KFR2R09 sdram self/auto-refresh setup code
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*
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* Copyright (C) 2009 Magnus Damm
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/sys.h>
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#include <linux/errno.h>
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#include <linux/linkage.h>
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#include <asm/asm-offsets.h>
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#include <asm/suspend.h>
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#include <asm/romimage-macros.h>
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/* code to enter and leave self-refresh. must be self-contained.
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* this code will be copied to on-chip memory and executed from there.
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*/
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.balign 4
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ENTRY(kfr2r09_sdram_enter_start)
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/* DBSC: put memory in self-refresh mode */
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ED 0xFD000010, 0x00000000 /* DBEN */
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ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
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ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
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ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
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ED 0xFD000040, 0x00000001 /* DBRFPDN0 */
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rts
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nop
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ENTRY(kfr2r09_sdram_enter_end)
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.balign 4
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ENTRY(kfr2r09_sdram_leave_start)
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/* DBSC: put memory in auto-refresh mode */
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ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
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WAIT 1
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ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
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ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
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ED 0xFD000010, 0x00000001 /* DBEN */
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ED 0xFD000040, 0x00010000 /* DBRFPDN0 */
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rts
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nop
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ENTRY(kfr2r09_sdram_leave_end)
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