From 55ba99eb211a06709237cb322ecd8c8b6faf6159 Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Tue, 3 Mar 2009 15:40:25 +0900 Subject: sh: Add support for SH7786 CPU subtype. This adds preliminary support for the SH7786 CPU subtype. While this is a dual-core CPU, only UP is supported for now. L2 cache support is likewise not yet implemented. More information on this particular CPU subtype is available at: http://www.renesas.com/fmwk.jsp?cnt=sh7786_root.jsp&fp=/products/mpumcu/superh_family/sh7780_series/sh7786_group/ Signed-off-by: Kuninori Morimoto Signed-off-by: Paul Mundt --- arch/sh/kernel/cpu/sh4a/Makefile | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/sh/kernel/cpu/sh4a/Makefile') diff --git a/arch/sh/kernel/cpu/sh4a/Makefile b/arch/sh/kernel/cpu/sh4a/Makefile index 8e344ec5847..1a92361feeb 100644 --- a/arch/sh/kernel/cpu/sh4a/Makefile +++ b/arch/sh/kernel/cpu/sh4a/Makefile @@ -7,6 +7,7 @@ obj-$(CONFIG_CPU_SUBTYPE_SH7763) += setup-sh7763.o obj-$(CONFIG_CPU_SUBTYPE_SH7770) += setup-sh7770.o obj-$(CONFIG_CPU_SUBTYPE_SH7780) += setup-sh7780.o obj-$(CONFIG_CPU_SUBTYPE_SH7785) += setup-sh7785.o +obj-$(CONFIG_CPU_SUBTYPE_SH7786) += setup-sh7786.o obj-$(CONFIG_CPU_SUBTYPE_SH7343) += setup-sh7343.o obj-$(CONFIG_CPU_SUBTYPE_SH7722) += setup-sh7722.o obj-$(CONFIG_CPU_SUBTYPE_SH7723) += setup-sh7723.o @@ -21,6 +22,7 @@ clock-$(CONFIG_CPU_SUBTYPE_SH7763) := clock-sh7763.o clock-$(CONFIG_CPU_SUBTYPE_SH7770) := clock-sh7770.o clock-$(CONFIG_CPU_SUBTYPE_SH7780) := clock-sh7780.o clock-$(CONFIG_CPU_SUBTYPE_SH7785) := clock-sh7785.o +clock-$(CONFIG_CPU_SUBTYPE_SH7786) := clock-sh7786.o clock-$(CONFIG_CPU_SUBTYPE_SH7343) := clock-sh7722.o clock-$(CONFIG_CPU_SUBTYPE_SH7722) := clock-sh7722.o clock-$(CONFIG_CPU_SUBTYPE_SH7723) := clock-sh7722.o @@ -31,6 +33,7 @@ clock-$(CONFIG_CPU_SUBTYPE_SHX3) := clock-shx3.o pinmux-$(CONFIG_CPU_SUBTYPE_SH7722) := pinmux-sh7722.o pinmux-$(CONFIG_CPU_SUBTYPE_SH7723) := pinmux-sh7723.o pinmux-$(CONFIG_CPU_SUBTYPE_SH7785) := pinmux-sh7785.o +pinmux-$(CONFIG_CPU_SUBTYPE_SH7786) := pinmux-sh7786.o obj-y += $(clock-y) obj-$(CONFIG_SMP) += $(smp-y) -- cgit v1.2.3-70-g09d2 From 7759491274bc5ba7cd72b3b9cc5ec8247b937efb Mon Sep 17 00:00:00 2001 From: Magnus Damm Date: Fri, 13 Mar 2009 15:23:04 +0000 Subject: sh: SuperH Mobile suspend support This patch contains CONFIG_SUSPEND support to the SuperH architecture. If enabled, SuperH Mobile processors will register their suspend callbacks during boot. To suspend, use "echo mem > /sys/power/state". To allow wakeup, make sure "/sys/device/platform/../power/wakeup" contains "enabled". Additional per-device driver patches are most likely needed. Signed-off-by: Magnus Damm Signed-off-by: Paul Mundt --- arch/sh/Kconfig | 1 + arch/sh/include/asm/suspend.h | 9 +++ arch/sh/kernel/cpu/sh4a/Makefile | 4 + arch/sh/kernel/cpu/sh4a/pm-sh_mobile.c | 92 ++++++++++++++++++++++ arch/sh/kernel/cpu/sh4a/sleep-sh_mobile.S | 125 ++++++++++++++++++++++++++++++ 5 files changed, 231 insertions(+) create mode 100644 arch/sh/kernel/cpu/sh4a/pm-sh_mobile.c create mode 100644 arch/sh/kernel/cpu/sh4a/sleep-sh_mobile.S (limited to 'arch/sh/kernel/cpu/sh4a/Makefile') diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index adffbf4048b..a0c879d17fd 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -181,6 +181,7 @@ config CPU_SHX3 config ARCH_SHMOBILE bool + select ARCH_SUSPEND_POSSIBLE choice prompt "Processor sub-type selection" diff --git a/arch/sh/include/asm/suspend.h b/arch/sh/include/asm/suspend.h index 5d6d8aba568..b1b995370e7 100644 --- a/arch/sh/include/asm/suspend.h +++ b/arch/sh/include/asm/suspend.h @@ -1,6 +1,7 @@ #ifndef _ASM_SH_SUSPEND_H #define _ASM_SH_SUSPEND_H +#ifndef __ASSEMBLY__ static inline int arch_prepare_suspend(void) { return 0; } #include @@ -9,5 +10,13 @@ struct swsusp_arch_regs { struct pt_regs user_regs; unsigned long bank1_regs[8]; }; +#endif + +/* flags passed to assembly suspend code */ +#define SUSP_SH_SLEEP (1 << 0) /* Regular sleep mode */ +#define SUSP_SH_STANDBY (1 << 1) /* SH-Mobile Software standby mode */ +#define SUSP_SH_RSTANDBY (1 << 2) /* SH-Mobile R-standby mode */ +#define SUSP_SH_USTANDBY (1 << 3) /* SH-Mobile U-standby mode */ +#define SUSP_SH_SF (1 << 4) /* Enable self-refresh */ #endif /* _ASM_SH_SUSPEND_H */ diff --git a/arch/sh/kernel/cpu/sh4a/Makefile b/arch/sh/kernel/cpu/sh4a/Makefile index 1a92361feeb..09967dc0065 100644 --- a/arch/sh/kernel/cpu/sh4a/Makefile +++ b/arch/sh/kernel/cpu/sh4a/Makefile @@ -35,6 +35,10 @@ pinmux-$(CONFIG_CPU_SUBTYPE_SH7723) := pinmux-sh7723.o pinmux-$(CONFIG_CPU_SUBTYPE_SH7785) := pinmux-sh7785.o pinmux-$(CONFIG_CPU_SUBTYPE_SH7786) := pinmux-sh7786.o +# Power Mangement & Sleep mode +pm-$(CONFIG_ARCH_SHMOBILE) := pm-sh_mobile.o sleep-sh_mobile.o + obj-y += $(clock-y) obj-$(CONFIG_SMP) += $(smp-y) obj-$(CONFIG_GENERIC_GPIO) += $(pinmux-y) +obj-$(CONFIG_PM) += $(pm-y) diff --git a/arch/sh/kernel/cpu/sh4a/pm-sh_mobile.c b/arch/sh/kernel/cpu/sh4a/pm-sh_mobile.c new file mode 100644 index 00000000000..8c067adf683 --- /dev/null +++ b/arch/sh/kernel/cpu/sh4a/pm-sh_mobile.c @@ -0,0 +1,92 @@ +/* + * arch/sh/kernel/cpu/sh4a/pm-sh_mobile.c + * + * Power management support code for SuperH Mobile + * + * 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 +#include +#include +#include +#include +#include + +/* + * Sleep modes available on SuperH Mobile: + * + * Sleep mode is just plain "sleep" instruction + * Sleep Self-Refresh mode is above plus RAM put in Self-Refresh + * Standby Self-Refresh mode is above plus stopped clocks + */ +#define SUSP_MODE_SLEEP (SUSP_SH_SLEEP) +#define SUSP_MODE_SLEEP_SF (SUSP_SH_SLEEP | SUSP_SH_SF) +#define SUSP_MODE_STANDBY_SF (SUSP_SH_STANDBY | SUSP_SH_SF) + +/* + * The following modes are not there yet: + * + * R-standby mode is unsupported, but will be added in the future + * U-standby mode is low priority since it needs bootloader hacks + * + * All modes should be tied in with cpuidle. But before that can + * happen we need to keep track of enabled hardware blocks so we + * can avoid entering sleep modes that stop clocks to hardware + * blocks that are in use even though the cpu core is idle. + */ + +extern const unsigned char sh_mobile_standby[]; +extern const unsigned int sh_mobile_standby_size; + +static void sh_mobile_call_standby(unsigned long mode) +{ + extern void *vbr_base; + void *onchip_mem = (void *)0xe5200000; /* ILRAM */ + void (*standby_onchip_mem)(unsigned long) = onchip_mem; + + /* Note: Wake up from sleep may generate exceptions! + * Setup VBR to point to on-chip ram if self-refresh is + * going to be used. + */ + if (mode & SUSP_SH_SF) + asm volatile("ldc %0, vbr" : : "r" (onchip_mem) : "memory"); + + /* Copy the assembly snippet to the otherwise ununsed ILRAM */ + memcpy(onchip_mem, sh_mobile_standby, sh_mobile_standby_size); + wmb(); + ctrl_barrier(); + + /* Let assembly snippet in on-chip memory handle the rest */ + standby_onchip_mem(mode); + + /* Put VBR back in System RAM again */ + if (mode & SUSP_SH_SF) + asm volatile("ldc %0, vbr" : : "r" (&vbr_base) : "memory"); +} + +static int sh_pm_enter(suspend_state_t state) +{ + local_irq_disable(); + set_bl_bit(); + sh_mobile_call_standby(SUSP_MODE_STANDBY_SF); + local_irq_disable(); + clear_bl_bit(); + return 0; +} + +static struct platform_suspend_ops sh_pm_ops = { + .enter = sh_pm_enter, + .valid = suspend_valid_only_mem, +}; + +static int __init sh_pm_init(void) +{ + suspend_set_ops(&sh_pm_ops); + return 0; +} + +late_initcall(sh_pm_init); diff --git a/arch/sh/kernel/cpu/sh4a/sleep-sh_mobile.S b/arch/sh/kernel/cpu/sh4a/sleep-sh_mobile.S new file mode 100644 index 00000000000..5d888ef53d8 --- /dev/null +++ b/arch/sh/kernel/cpu/sh4a/sleep-sh_mobile.S @@ -0,0 +1,125 @@ +/* + * arch/sh/kernel/cpu/sh4a/sleep-sh_mobile.S + * + * Sleep mode and Standby modes support for SuperH Mobile + * + * 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 +#include +#include +#include +#include + +/* manage self-refresh and enter standby mode. + * this code will be copied to on-chip memory and executed from there. + */ + + .balign 4096,0,4096 +ENTRY(sh_mobile_standby) + mov r4, r0 + + tst #SUSP_SH_SF, r0 + bt skip_set_sf + + /* SDRAM: 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 + +skip_set_sf: + tst #SUSP_SH_SLEEP, r0 + bt test_standby + + /* set mode to "sleep mode" */ + bra do_sleep + mov #0x00, r1 + +test_standby: + tst #SUSP_SH_STANDBY, r0 + bt test_rstandby + + /* set mode to "software standby mode" */ + bra do_sleep + mov #0x80, r1 + +test_rstandby: + tst #SUSP_SH_RSTANDBY, r0 + bt test_ustandby + + /* set mode to "r-standby mode" */ + bra do_sleep + mov #0x20, r1 + +test_ustandby: + tst #SUSP_SH_USTANDBY, r0 + bt done_sleep + + /* set mode to "u-standby mode" */ + mov #0x10, r1 + + /* fall-through */ + +do_sleep: + /* setup and enter selected standby mode */ + mov.l 5f, r4 + mov.l r1, @r4 + sleep + +done_sleep: + /* reset standby mode to sleep mode */ + mov.l 5f, r4 + mov #0x00, r1 + mov.l r1, @r4 + + tst #SUSP_SH_SF, r0 + bt skip_restore_sf + + /* SDRAM: set auto-refresh mode */ + mov.l 1f, r4 + mov.l @r4, r2 + mov.l 4f, r3 + and r3, r2 + mov.l r2, @r4 + mov.l 6f, r4 + mov.l 7f, r1 + mov.l 8f, r2 + mov.l @r4, r3 + mov #-1, r4 + add r4, r3 + or r2, r3 + mov.l r3, @r1 +skip_restore_sf: + rts + nop + + .balign 4 +1: .long 0xfe400008 /* SDCR0 */ +2: .long 0x00000400 +3: .long 0xffff7fff +4: .long 0xfffffbff +5: .long 0xa4150020 /* STBCR */ +6: .long 0xfe40001c /* RTCOR */ +7: .long 0xfe400018 /* RTCNT */ +8: .long 0xa55a0000 + +/* interrupt vector @ 0x600 */ + .balign 0x400,0,0x400 + .long 0xdeadbeef + .balign 0x200,0,0x200 + /* sh7722 will end up here in sleep mode */ + rte + nop +sh_mobile_standby_end: + +ENTRY(sh_mobile_standby_size) + .long sh_mobile_standby_end - sh_mobile_standby -- cgit v1.2.3-70-g09d2 From e9edb3fec2260b5a64e9ca9e09160b74f1b106e3 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Mon, 16 Mar 2009 20:00:17 +0900 Subject: sh: Consolidate SH-Mobile CPU code in arch/sh/kernel/cpu/shmobile/. Signed-off-by: Paul Mundt --- arch/sh/kernel/cpu/Makefile | 1 + arch/sh/kernel/cpu/sh4a/Makefile | 4 - arch/sh/kernel/cpu/sh4a/pm-sh_mobile.c | 92 ---------------------- arch/sh/kernel/cpu/sh4a/sleep-sh_mobile.S | 125 ------------------------------ arch/sh/kernel/cpu/shmobile/Makefile | 6 ++ arch/sh/kernel/cpu/shmobile/pm.c | 92 ++++++++++++++++++++++ arch/sh/kernel/cpu/shmobile/sleep.S | 125 ++++++++++++++++++++++++++++++ 7 files changed, 224 insertions(+), 221 deletions(-) delete mode 100644 arch/sh/kernel/cpu/sh4a/pm-sh_mobile.c delete mode 100644 arch/sh/kernel/cpu/sh4a/sleep-sh_mobile.S create mode 100644 arch/sh/kernel/cpu/shmobile/Makefile create mode 100644 arch/sh/kernel/cpu/shmobile/pm.c create mode 100644 arch/sh/kernel/cpu/shmobile/sleep.S (limited to 'arch/sh/kernel/cpu/sh4a/Makefile') diff --git a/arch/sh/kernel/cpu/Makefile b/arch/sh/kernel/cpu/Makefile index f471d242774..2600641a483 100644 --- a/arch/sh/kernel/cpu/Makefile +++ b/arch/sh/kernel/cpu/Makefile @@ -11,6 +11,7 @@ obj-$(CONFIG_CPU_SH5) = sh5/ # Special cases for family ancestry. obj-$(CONFIG_CPU_SH4A) += sh4a/ +obj-$(CONFIG_ARCH_SHMOBILE) += shmobile/ # Common interfaces. diff --git a/arch/sh/kernel/cpu/sh4a/Makefile b/arch/sh/kernel/cpu/sh4a/Makefile index 09967dc0065..1a92361feeb 100644 --- a/arch/sh/kernel/cpu/sh4a/Makefile +++ b/arch/sh/kernel/cpu/sh4a/Makefile @@ -35,10 +35,6 @@ pinmux-$(CONFIG_CPU_SUBTYPE_SH7723) := pinmux-sh7723.o pinmux-$(CONFIG_CPU_SUBTYPE_SH7785) := pinmux-sh7785.o pinmux-$(CONFIG_CPU_SUBTYPE_SH7786) := pinmux-sh7786.o -# Power Mangement & Sleep mode -pm-$(CONFIG_ARCH_SHMOBILE) := pm-sh_mobile.o sleep-sh_mobile.o - obj-y += $(clock-y) obj-$(CONFIG_SMP) += $(smp-y) obj-$(CONFIG_GENERIC_GPIO) += $(pinmux-y) -obj-$(CONFIG_PM) += $(pm-y) diff --git a/arch/sh/kernel/cpu/sh4a/pm-sh_mobile.c b/arch/sh/kernel/cpu/sh4a/pm-sh_mobile.c deleted file mode 100644 index 8c067adf683..00000000000 --- a/arch/sh/kernel/cpu/sh4a/pm-sh_mobile.c +++ /dev/null @@ -1,92 +0,0 @@ -/* - * arch/sh/kernel/cpu/sh4a/pm-sh_mobile.c - * - * Power management support code for SuperH Mobile - * - * 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 -#include -#include -#include -#include -#include - -/* - * Sleep modes available on SuperH Mobile: - * - * Sleep mode is just plain "sleep" instruction - * Sleep Self-Refresh mode is above plus RAM put in Self-Refresh - * Standby Self-Refresh mode is above plus stopped clocks - */ -#define SUSP_MODE_SLEEP (SUSP_SH_SLEEP) -#define SUSP_MODE_SLEEP_SF (SUSP_SH_SLEEP | SUSP_SH_SF) -#define SUSP_MODE_STANDBY_SF (SUSP_SH_STANDBY | SUSP_SH_SF) - -/* - * The following modes are not there yet: - * - * R-standby mode is unsupported, but will be added in the future - * U-standby mode is low priority since it needs bootloader hacks - * - * All modes should be tied in with cpuidle. But before that can - * happen we need to keep track of enabled hardware blocks so we - * can avoid entering sleep modes that stop clocks to hardware - * blocks that are in use even though the cpu core is idle. - */ - -extern const unsigned char sh_mobile_standby[]; -extern const unsigned int sh_mobile_standby_size; - -static void sh_mobile_call_standby(unsigned long mode) -{ - extern void *vbr_base; - void *onchip_mem = (void *)0xe5200000; /* ILRAM */ - void (*standby_onchip_mem)(unsigned long) = onchip_mem; - - /* Note: Wake up from sleep may generate exceptions! - * Setup VBR to point to on-chip ram if self-refresh is - * going to be used. - */ - if (mode & SUSP_SH_SF) - asm volatile("ldc %0, vbr" : : "r" (onchip_mem) : "memory"); - - /* Copy the assembly snippet to the otherwise ununsed ILRAM */ - memcpy(onchip_mem, sh_mobile_standby, sh_mobile_standby_size); - wmb(); - ctrl_barrier(); - - /* Let assembly snippet in on-chip memory handle the rest */ - standby_onchip_mem(mode); - - /* Put VBR back in System RAM again */ - if (mode & SUSP_SH_SF) - asm volatile("ldc %0, vbr" : : "r" (&vbr_base) : "memory"); -} - -static int sh_pm_enter(suspend_state_t state) -{ - local_irq_disable(); - set_bl_bit(); - sh_mobile_call_standby(SUSP_MODE_STANDBY_SF); - local_irq_disable(); - clear_bl_bit(); - return 0; -} - -static struct platform_suspend_ops sh_pm_ops = { - .enter = sh_pm_enter, - .valid = suspend_valid_only_mem, -}; - -static int __init sh_pm_init(void) -{ - suspend_set_ops(&sh_pm_ops); - return 0; -} - -late_initcall(sh_pm_init); diff --git a/arch/sh/kernel/cpu/sh4a/sleep-sh_mobile.S b/arch/sh/kernel/cpu/sh4a/sleep-sh_mobile.S deleted file mode 100644 index 5d888ef53d8..00000000000 --- a/arch/sh/kernel/cpu/sh4a/sleep-sh_mobile.S +++ /dev/null @@ -1,125 +0,0 @@ -/* - * arch/sh/kernel/cpu/sh4a/sleep-sh_mobile.S - * - * Sleep mode and Standby modes support for SuperH Mobile - * - * 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 -#include -#include -#include -#include - -/* manage self-refresh and enter standby mode. - * this code will be copied to on-chip memory and executed from there. - */ - - .balign 4096,0,4096 -ENTRY(sh_mobile_standby) - mov r4, r0 - - tst #SUSP_SH_SF, r0 - bt skip_set_sf - - /* SDRAM: 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 - -skip_set_sf: - tst #SUSP_SH_SLEEP, r0 - bt test_standby - - /* set mode to "sleep mode" */ - bra do_sleep - mov #0x00, r1 - -test_standby: - tst #SUSP_SH_STANDBY, r0 - bt test_rstandby - - /* set mode to "software standby mode" */ - bra do_sleep - mov #0x80, r1 - -test_rstandby: - tst #SUSP_SH_RSTANDBY, r0 - bt test_ustandby - - /* set mode to "r-standby mode" */ - bra do_sleep - mov #0x20, r1 - -test_ustandby: - tst #SUSP_SH_USTANDBY, r0 - bt done_sleep - - /* set mode to "u-standby mode" */ - mov #0x10, r1 - - /* fall-through */ - -do_sleep: - /* setup and enter selected standby mode */ - mov.l 5f, r4 - mov.l r1, @r4 - sleep - -done_sleep: - /* reset standby mode to sleep mode */ - mov.l 5f, r4 - mov #0x00, r1 - mov.l r1, @r4 - - tst #SUSP_SH_SF, r0 - bt skip_restore_sf - - /* SDRAM: set auto-refresh mode */ - mov.l 1f, r4 - mov.l @r4, r2 - mov.l 4f, r3 - and r3, r2 - mov.l r2, @r4 - mov.l 6f, r4 - mov.l 7f, r1 - mov.l 8f, r2 - mov.l @r4, r3 - mov #-1, r4 - add r4, r3 - or r2, r3 - mov.l r3, @r1 -skip_restore_sf: - rts - nop - - .balign 4 -1: .long 0xfe400008 /* SDCR0 */ -2: .long 0x00000400 -3: .long 0xffff7fff -4: .long 0xfffffbff -5: .long 0xa4150020 /* STBCR */ -6: .long 0xfe40001c /* RTCOR */ -7: .long 0xfe400018 /* RTCNT */ -8: .long 0xa55a0000 - -/* interrupt vector @ 0x600 */ - .balign 0x400,0,0x400 - .long 0xdeadbeef - .balign 0x200,0,0x200 - /* sh7722 will end up here in sleep mode */ - rte - nop -sh_mobile_standby_end: - -ENTRY(sh_mobile_standby_size) - .long sh_mobile_standby_end - sh_mobile_standby diff --git a/arch/sh/kernel/cpu/shmobile/Makefile b/arch/sh/kernel/cpu/shmobile/Makefile new file mode 100644 index 00000000000..08bfa7c7db2 --- /dev/null +++ b/arch/sh/kernel/cpu/shmobile/Makefile @@ -0,0 +1,6 @@ +# +# Makefile for the Linux/SuperH SH-Mobile backends. +# + +# Power Management & Sleep mode +obj-$(CONFIG_PM) += pm.o sleep.o diff --git a/arch/sh/kernel/cpu/shmobile/pm.c b/arch/sh/kernel/cpu/shmobile/pm.c new file mode 100644 index 00000000000..8c067adf683 --- /dev/null +++ b/arch/sh/kernel/cpu/shmobile/pm.c @@ -0,0 +1,92 @@ +/* + * arch/sh/kernel/cpu/sh4a/pm-sh_mobile.c + * + * Power management support code for SuperH Mobile + * + * 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 +#include +#include +#include +#include +#include + +/* + * Sleep modes available on SuperH Mobile: + * + * Sleep mode is just plain "sleep" instruction + * Sleep Self-Refresh mode is above plus RAM put in Self-Refresh + * Standby Self-Refresh mode is above plus stopped clocks + */ +#define SUSP_MODE_SLEEP (SUSP_SH_SLEEP) +#define SUSP_MODE_SLEEP_SF (SUSP_SH_SLEEP | SUSP_SH_SF) +#define SUSP_MODE_STANDBY_SF (SUSP_SH_STANDBY | SUSP_SH_SF) + +/* + * The following modes are not there yet: + * + * R-standby mode is unsupported, but will be added in the future + * U-standby mode is low priority since it needs bootloader hacks + * + * All modes should be tied in with cpuidle. But before that can + * happen we need to keep track of enabled hardware blocks so we + * can avoid entering sleep modes that stop clocks to hardware + * blocks that are in use even though the cpu core is idle. + */ + +extern const unsigned char sh_mobile_standby[]; +extern const unsigned int sh_mobile_standby_size; + +static void sh_mobile_call_standby(unsigned long mode) +{ + extern void *vbr_base; + void *onchip_mem = (void *)0xe5200000; /* ILRAM */ + void (*standby_onchip_mem)(unsigned long) = onchip_mem; + + /* Note: Wake up from sleep may generate exceptions! + * Setup VBR to point to on-chip ram if self-refresh is + * going to be used. + */ + if (mode & SUSP_SH_SF) + asm volatile("ldc %0, vbr" : : "r" (onchip_mem) : "memory"); + + /* Copy the assembly snippet to the otherwise ununsed ILRAM */ + memcpy(onchip_mem, sh_mobile_standby, sh_mobile_standby_size); + wmb(); + ctrl_barrier(); + + /* Let assembly snippet in on-chip memory handle the rest */ + standby_onchip_mem(mode); + + /* Put VBR back in System RAM again */ + if (mode & SUSP_SH_SF) + asm volatile("ldc %0, vbr" : : "r" (&vbr_base) : "memory"); +} + +static int sh_pm_enter(suspend_state_t state) +{ + local_irq_disable(); + set_bl_bit(); + sh_mobile_call_standby(SUSP_MODE_STANDBY_SF); + local_irq_disable(); + clear_bl_bit(); + return 0; +} + +static struct platform_suspend_ops sh_pm_ops = { + .enter = sh_pm_enter, + .valid = suspend_valid_only_mem, +}; + +static int __init sh_pm_init(void) +{ + suspend_set_ops(&sh_pm_ops); + return 0; +} + +late_initcall(sh_pm_init); diff --git a/arch/sh/kernel/cpu/shmobile/sleep.S b/arch/sh/kernel/cpu/shmobile/sleep.S new file mode 100644 index 00000000000..5d888ef53d8 --- /dev/null +++ b/arch/sh/kernel/cpu/shmobile/sleep.S @@ -0,0 +1,125 @@ +/* + * arch/sh/kernel/cpu/sh4a/sleep-sh_mobile.S + * + * Sleep mode and Standby modes support for SuperH Mobile + * + * 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 +#include +#include +#include +#include + +/* manage self-refresh and enter standby mode. + * this code will be copied to on-chip memory and executed from there. + */ + + .balign 4096,0,4096 +ENTRY(sh_mobile_standby) + mov r4, r0 + + tst #SUSP_SH_SF, r0 + bt skip_set_sf + + /* SDRAM: 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 + +skip_set_sf: + tst #SUSP_SH_SLEEP, r0 + bt test_standby + + /* set mode to "sleep mode" */ + bra do_sleep + mov #0x00, r1 + +test_standby: + tst #SUSP_SH_STANDBY, r0 + bt test_rstandby + + /* set mode to "software standby mode" */ + bra do_sleep + mov #0x80, r1 + +test_rstandby: + tst #SUSP_SH_RSTANDBY, r0 + bt test_ustandby + + /* set mode to "r-standby mode" */ + bra do_sleep + mov #0x20, r1 + +test_ustandby: + tst #SUSP_SH_USTANDBY, r0 + bt done_sleep + + /* set mode to "u-standby mode" */ + mov #0x10, r1 + + /* fall-through */ + +do_sleep: + /* setup and enter selected standby mode */ + mov.l 5f, r4 + mov.l r1, @r4 + sleep + +done_sleep: + /* reset standby mode to sleep mode */ + mov.l 5f, r4 + mov #0x00, r1 + mov.l r1, @r4 + + tst #SUSP_SH_SF, r0 + bt skip_restore_sf + + /* SDRAM: set auto-refresh mode */ + mov.l 1f, r4 + mov.l @r4, r2 + mov.l 4f, r3 + and r3, r2 + mov.l r2, @r4 + mov.l 6f, r4 + mov.l 7f, r1 + mov.l 8f, r2 + mov.l @r4, r3 + mov #-1, r4 + add r4, r3 + or r2, r3 + mov.l r3, @r1 +skip_restore_sf: + rts + nop + + .balign 4 +1: .long 0xfe400008 /* SDCR0 */ +2: .long 0x00000400 +3: .long 0xffff7fff +4: .long 0xfffffbff +5: .long 0xa4150020 /* STBCR */ +6: .long 0xfe40001c /* RTCOR */ +7: .long 0xfe400018 /* RTCNT */ +8: .long 0xa55a0000 + +/* interrupt vector @ 0x600 */ + .balign 0x400,0,0x400 + .long 0xdeadbeef + .balign 0x200,0,0x200 + /* sh7722 will end up here in sleep mode */ + rte + nop +sh_mobile_standby_end: + +ENTRY(sh_mobile_standby_size) + .long sh_mobile_standby_end - sh_mobile_standby -- cgit v1.2.3-70-g09d2