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sh: Add kfr2r09 specific memory pre/post sleep code

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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>
This commit is contained in:
Magnus Damm 2009-10-29 10:52:15 +00:00 committed by Paul Mundt
parent 159f8cd99e
commit 67e522d0f9
3 changed files with 66 additions and 1 deletions
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2
arch/sh/boards/mach-kfr2r09/Makefile
View file

@ -1,2 +1,2 @@
obj-y := setup.o
obj-y := setup.o sdram.o
obj-$(CONFIG_FB_SH_MOBILE_LCDC) += lcd_wqvga.o

52
arch/sh/boards/mach-kfr2r09/sdram.S Normal file
View file

@ -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 <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 */
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)

13
arch/sh/boards/mach-kfr2r09/setup.c
View file

@ -21,6 +21,7 @@
#include <media/soc_camera.h>
#include <media/sh_mobile_ceu.h>
#include <video/sh_mobile_lcdc.h>
#include <asm/suspend.h>
#include <asm/clock.h>
#include <asm/machvec.h>
#include <asm/io.h>
@ -444,8 +445,20 @@ static int kfr2r09_usb0_gadget_setup(void)
return 0;
}
extern char kfr2r09_sdram_enter_start;
extern char kfr2r09_sdram_enter_end;
extern char kfr2r09_sdram_leave_start;
extern char kfr2r09_sdram_leave_end;
static int __init kfr2r09_devices_setup(void)
{
/* register board specific self-refresh code */
sh_mobile_register_self_refresh(SUSP_SH_STANDBY | SUSP_SH_SF,
&kfr2r09_sdram_enter_start,
&kfr2r09_sdram_enter_end,
&kfr2r09_sdram_leave_start,
&kfr2r09_sdram_leave_end);
/* enable SCIF1 serial port for YC401 console support */
gpio_request(GPIO_FN_SCIF1_RXD, NULL);
gpio_request(GPIO_FN_SCIF1_TXD, NULL);