@@ -159,6 +159,7 @@ config CPU_SH4
select CPU_HAS_SR_RB
select CPU_HAS_PTEA if !CPU_SH4A || CPU_SHX2
select CPU_HAS_FPU if !CPU_SH4AL_DSP
+ select ARCH_SUSPEND_POSSIBLE
config CPU_SH4A
bool
@@ -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 <asm/ptrace.h>
@@ -9,5 +10,16 @@ struct swsusp_arch_regs {
struct pt_regs user_regs;
unsigned long bank1_regs[8];
};
+#endif
+
+#define SUSP_SH_SLEEP (1 << 0) /* Regular sleep mode */
+#define SUSP_SH_STANDBY (1 << 1) /* Software standby mode */
+#define SUSP_SH_RSTANDBY (1 << 2) /* R-standby mode */
+#define SUSP_SH_USTANDBY (1 << 3) /* U-standby mode */
+#define SUSP_SH_SF (1 << 4) /* Enable self-refresh */
+
+#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)
#endif /* _ASM_SH_SUSPEND_H */
@@ -35,6 +35,13 @@ pinmux-$(CONFIG_CPU_SUBTYPE_SH7723) := p
pinmux-$(CONFIG_CPU_SUBTYPE_SH7785) := pinmux-sh7785.o
pinmux-$(CONFIG_CPU_SUBTYPE_SH7786) := pinmux-sh7786.o
+# Power Mangement & Sleep mode
+pm-$(CONFIG_CPU_SUBTYPE_SH7343) := pm-sh_mobile.o sleep-sh_mobile.o
+pm-$(CONFIG_CPU_SUBTYPE_SH7366) := pm-sh_mobile.o sleep-sh_mobile.o
+pm-$(CONFIG_CPU_SUBTYPE_SH7722) := pm-sh_mobile.o sleep-sh_mobile.o
+pm-$(CONFIG_CPU_SUBTYPE_SH7723) := 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)
@@ -0,0 +1,76 @@
+/*
+ * 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 <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/suspend.h>
+#include <asm/suspend.h>
+#include <asm/uaccess.h>
+
+extern const unsigned char do_standby[];
+extern const unsigned int do_standby_size;
+
+#define ILRAM_ADDR 0xe5200000
+
+static void set_vbr(void *base)
+{
+ asm volatile("ldc %0, vbr"
+ : /* no output */
+ : "r" (base)
+ : "memory");
+}
+
+static void sh_suspend_mode(unsigned long mode)
+{
+ extern void *vbr_base;
+ void *onchip_memory = (void *)ILRAM_ADDR;
+ void (*do_standby_ilram)(unsigned long) = onchip_memory;
+
+ /* wake up from sleep may generate exceptions
+ * so setup temporary VBR to point to on-chip ram
+ * if system ram will be put self-refresh during sleep.
+ */
+
+ if (mode & SUSP_SH_SF)
+ set_vbr(onchip_memory);
+
+ memcpy(onchip_memory, do_standby, do_standby_size);
+ wmb();
+ ctrl_barrier();
+ do_standby_ilram(mode);
+
+ if (mode & SUSP_SH_SF)
+ set_vbr(&vbr_base);
+}
+
+static int sh_pm_enter(suspend_state_t state)
+{
+ local_irq_disable();
+ set_bl_bit();
+ sh_suspend_mode(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);
@@ -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 <linux/sys.h>
+#include <linux/errno.h>
+#include <linux/linkage.h>
+#include <asm/asm-offsets.h>
+#include <asm/suspend.h>
+
+/* 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(do_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
+do_standby_end:
+
+ENTRY(do_standby_size)
+ .long do_standby_end - do_standby