diff options
author | Magnus Damm <damm@opensource.se> | 2009-10-29 10:52:31 +0000 |
---|---|---|
committer | Paul Mundt <lethal@linux-sh.org> | 2009-10-30 11:59:27 +0900 |
commit | 13fa551b5eb1752c6974a81ef19f369220972cf2 (patch) | |
tree | 1c5d64664d36dc4784451fabb1da8629026d4067 /arch | |
parent | 3b9f2952a3eda738f5f2d7610b76e284cbac581f (diff) | |
download | op-kernel-dev-13fa551b5eb1752c6974a81ef19f369220972cf2.zip op-kernel-dev-13fa551b5eb1752c6974a81ef19f369220972cf2.tar.gz |
sh: Add migor specific memory pre/post sleep code
Add self-refresh handling code for the Migo-R board.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/sh/boards/mach-migor/Makefile | 2 | ||||
-rw-r--r-- | arch/sh/boards/mach-migor/sdram.S | 69 | ||||
-rw-r--r-- | arch/sh/boards/mach-migor/setup.c | 13 |
3 files changed, 82 insertions, 2 deletions
diff --git a/arch/sh/boards/mach-migor/Makefile b/arch/sh/boards/mach-migor/Makefile index 5f231dd..4601a89 100644 --- a/arch/sh/boards/mach-migor/Makefile +++ b/arch/sh/boards/mach-migor/Makefile @@ -1,2 +1,2 @@ -obj-y := setup.o +obj-y := setup.o sdram.o obj-$(CONFIG_SH_MIGOR_QVGA) += lcd_qvga.o diff --git a/arch/sh/boards/mach-migor/sdram.S b/arch/sh/boards/mach-migor/sdram.S new file mode 100644 index 0000000..614aa3a --- /dev/null +++ b/arch/sh/boards/mach-migor/sdram.S @@ -0,0 +1,69 @@ +/* + * Migo-R 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(migor_sdram_enter_start) + + /* SBSC: disable power down and put in self-refresh mode */ + mov.l 1f, r4 + mov.l 2f, r1 + mov.l @r4, r2 + or r1, r2 + mov.l 3f, r3 + and r3, r2 + mov.l r2, @r4 + + rts + nop + + .balign 4 +1: .long 0xfe400008 /* SDCR0 */ +2: .long 0x00000400 +3: .long 0xffff7fff +ENTRY(migor_sdram_enter_end) + + .balign 4 +ENTRY(migor_sdram_leave_start) + + /* SBSC: set auto-refresh mode */ + mov.l 1f, r4 + mov.l @r4, r0 + mov.l 4f, r1 + and r1, r0 + mov.l r0, @r4 + mov.l 6f, r4 + mov.l 8f, r0 + mov.l @r4, r1 + mov #-1, r4 + add r4, r1 + or r1, r0 + mov.l 7f, r1 + mov.l r0, @r1 + + rts + nop + + .balign 4 +1: .long 0xfe400008 /* SDCR0 */ +4: .long 0xfffffbff +6: .long 0xfe40001c /* RTCOR */ +7: .long 0xfe400018 /* RTCNT */ +8: .long 0xa55a0000 +ENTRY(migor_sdram_leave_end) diff --git a/arch/sh/boards/mach-migor/setup.c b/arch/sh/boards/mach-migor/setup.c index 8e91136..3695257 100644 --- a/arch/sh/boards/mach-migor/setup.c +++ b/arch/sh/boards/mach-migor/setup.c @@ -26,6 +26,7 @@ #include <asm/machvec.h> #include <asm/io.h> #include <asm/sh_keysc.h> +#include <asm/suspend.h> #include <mach/migor.h> #include <cpu/sh7722.h> @@ -478,9 +479,19 @@ static struct platform_device *migor_devices[] __initdata = { &migor_camera[1], }; +extern char migor_sdram_enter_start; +extern char migor_sdram_enter_end; +extern char migor_sdram_leave_start; +extern char migor_sdram_leave_end; + static int __init migor_devices_setup(void) { - + /* register board specific self-refresh code */ + sh_mobile_register_self_refresh(SUSP_SH_STANDBY | SUSP_SH_SF, + &migor_sdram_enter_start, + &migor_sdram_enter_end, + &migor_sdram_leave_start, + &migor_sdram_leave_end); #ifdef CONFIG_PM /* Let D11 LED show STATUS0 */ gpio_request(GPIO_FN_STATUS0, NULL); |