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sh: Add ms7724se specific memory pre/post sleep code

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Add self-refresh handling code for the MS7724SE board.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Magnus Damm 2009-10-29 10:52:23 +00:00 committed by Paul Mundt
parent 67e522d0f9
commit 3b9f2952a3
3 changed files with 65 additions and 1 deletions
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2
arch/sh/boards/mach-se/7724/Makefile
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@ -7,4 +7,4 @@
#
#
obj-y := setup.o irq.o
obj-y := setup.o irq.o sdram.o

52
arch/sh/boards/mach-se/7724/sdram.S Normal file
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@ -0,0 +1,52 @@
/*
* MS7724SE 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 <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(ms7724se_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(ms7724se_sdram_enter_end)
.balign 4
ENTRY(ms7724se_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(ms7724se_sdram_leave_end)

12
arch/sh/boards/mach-se/7724/setup.c
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@ -28,6 +28,7 @@
#include <asm/sh_eth.h>
#include <asm/clock.h>
#include <asm/sh_keysc.h>
#include <asm/suspend.h>
#include <cpu/sh7724.h>
#include <mach-se/mach/se7724.h>
@ -566,11 +567,22 @@ static void __init sh_eth_init(void)
#define SW41_G 0x4000
#define SW41_H 0x8000
extern char ms7724se_sdram_enter_start;
extern char ms7724se_sdram_enter_end;
extern char ms7724se_sdram_leave_start;
extern char ms7724se_sdram_leave_end;
static int __init devices_setup(void)
{
u16 sw = ctrl_inw(SW4140); /* select camera, monitor */
struct clk *fsia_clk;
/* register board specific self-refresh code */
sh_mobile_register_self_refresh(SUSP_SH_STANDBY | SUSP_SH_SF,
&ms7724se_sdram_enter_start,
&ms7724se_sdram_enter_end,
&ms7724se_sdram_leave_start,
&ms7724se_sdram_leave_end);
/* Reset Release */
ctrl_outw(ctrl_inw(FPGA_OUT) &
~((1 << 1) | /* LAN */