diff options
| author | Magnus Damm <damm@opensource.se> | 2009-10-30 04:23:59 +0000 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-10-30 14:33:46 +0900 |
| commit | eb0cd9e88c6a6561055b32a17d44d8918aecc3c7 (patch) | |
| tree | 7f91f60d07f07bc5b06879ee534958eb5ebc8de5 /arch/sh/boards/mach-ecovec24 | |
| parent | 86c7d03a0fe4241e64eb19b86544647c8ee4bac9 (diff) | |
sh: Add Ecovec24 specific memory pre/post sleep code
Add self-refresh handling code for the Ecovec24 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-ecovec24')
| -rw-r--r-- | arch/sh/boards/mach-ecovec24/Makefile | 2 | ||||
| -rw-r--r-- | arch/sh/boards/mach-ecovec24/sdram.S | 52 | ||||
| -rw-r--r-- | arch/sh/boards/mach-ecovec24/setup.c | 14 |
3 files changed, 67 insertions, 1 deletions
diff --git a/arch/sh/boards/mach-ecovec24/Makefile b/arch/sh/boards/mach-ecovec24/Makefile index 51f85215165..e69bc82208f 100644 --- a/arch/sh/boards/mach-ecovec24/Makefile +++ b/arch/sh/boards/mach-ecovec24/Makefile @@ -6,4 +6,4 @@ # for more details. # -obj-y := setup.o
\ No newline at end of file +obj-y := setup.o sdram.o
\ No newline at end of file diff --git a/arch/sh/boards/mach-ecovec24/sdram.S b/arch/sh/boards/mach-ecovec24/sdram.S new file mode 100644 index 00000000000..83344004440 --- /dev/null +++ b/arch/sh/boards/mach-ecovec24/sdram.S @@ -0,0 +1,52 @@ +/* + * Ecovec24 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(ecovec24_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(ecovec24_sdram_enter_end) + + .balign 4 +ENTRY(ecovec24_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(ecovec24_sdram_leave_end) diff --git a/arch/sh/boards/mach-ecovec24/setup.c b/arch/sh/boards/mach-ecovec24/setup.c index c3d05e5be2e..2274985753a 100644 --- a/arch/sh/boards/mach-ecovec24/setup.c +++ b/arch/sh/boards/mach-ecovec24/setup.c @@ -26,6 +26,7 @@ #include <asm/sh_eth.h> #include <asm/sh_keysc.h> #include <asm/clock.h> +#include <asm/suspend.h> #include <cpu/sh7724.h> /* @@ -526,8 +527,21 @@ static void __init sh_eth_init(struct sh_eth_plat_data *pd) #define PORT_HIZA 0xA4050158 #define IODRIVEA 0xA405018A + +extern char ecovec24_sdram_enter_start; +extern char ecovec24_sdram_enter_end; +extern char ecovec24_sdram_leave_start; +extern char ecovec24_sdram_leave_end; + static int __init arch_setup(void) { + /* register board specific self-refresh code */ + sh_mobile_register_self_refresh(SUSP_SH_STANDBY | SUSP_SH_SF, + &ecovec24_sdram_enter_start, + &ecovec24_sdram_enter_end, + &ecovec24_sdram_leave_start, + &ecovec24_sdram_leave_end); + /* enable STATUS0, STATUS2 and PDSTATUS */ gpio_request(GPIO_FN_STATUS0, NULL); gpio_request(GPIO_FN_STATUS2, NULL); |