diff options
| author | Magnus Damm <damm@opensource.se> | 2009-10-29 13:52:23 +0300 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-10-30 05:59:26 +0300 |
| commit | 3b9f2952a3eda738f5f2d7610b76e284cbac581f (patch) | |
| tree | 23937cebe892efcb3d5d8767c0b5606f61aece4a /arch/sh/boards/mach-se | |
| parent | 67e522d0f91349127b3e0e536578be484cdb3367 (diff) | |
| download | linux-3b9f2952a3eda738f5f2d7610b76e284cbac581f.tar.xz | |
sh: Add ms7724se specific memory pre/post sleep code
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>
Diffstat (limited to 'arch/sh/boards/mach-se')
| -rw-r--r-- | arch/sh/boards/mach-se/7724/Makefile | 2 | ||||
| -rw-r--r-- | arch/sh/boards/mach-se/7724/sdram.S | 52 | ||||
| -rw-r--r-- | arch/sh/boards/mach-se/7724/setup.c | 12 |
3 files changed, 65 insertions, 1 deletions
diff --git a/arch/sh/boards/mach-se/7724/Makefile b/arch/sh/boards/mach-se/7724/Makefile index 349cbd6ce82d..a08b36830f0e 100644 --- a/arch/sh/boards/mach-se/7724/Makefile +++ b/arch/sh/boards/mach-se/7724/Makefile @@ -7,4 +7,4 @@ # # -obj-y := setup.o irq.o
\ No newline at end of file +obj-y := setup.o irq.o sdram.o diff --git a/arch/sh/boards/mach-se/7724/sdram.S b/arch/sh/boards/mach-se/7724/sdram.S new file mode 100644 index 000000000000..9040167d5022 --- /dev/null +++ b/arch/sh/boards/mach-se/7724/sdram.S @@ -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) diff --git a/arch/sh/boards/mach-se/7724/setup.c b/arch/sh/boards/mach-se/7724/setup.c index ffb97f22783c..ae23fa970e6d 100644 --- a/arch/sh/boards/mach-se/7724/setup.c +++ b/arch/sh/boards/mach-se/7724/setup.c @@ -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 */ |