6 files changed, 118 insertions, 31 deletions

diff --git a/arch/arm/mach-shmobile/include/mach/common.h b/arch/arm/mach-shmobile/include/mach/common.h
index 834bd6cd508f..4807623fb71c 100644
--- a/arch/arm/mach-shmobile/include/mach/common.h
+++ b/arch/arm/mach-shmobile/include/mach/common.h
@@ -35,8 +35,8 @@ extern void sh7372_add_standard_devices(void);
 extern void sh7372_clock_init(void);
 extern void sh7372_pinmux_init(void);
 extern void sh7372_pm_init(void);
-extern void sh7372_resume_core_standby_a3sm(void);
-extern int sh7372_do_idle_a3sm(unsigned long unused);
+extern void sh7372_resume_core_standby_sysc(void);
+extern int sh7372_do_idle_sysc(unsigned long sleep_mode);
 extern struct clk sh7372_extal1_clk;
 extern struct clk sh7372_extal2_clk;
 
diff --git a/arch/arm/mach-shmobile/include/mach/sh7372.h b/arch/arm/mach-shmobile/include/mach/sh7372.h
index 84532f9629b2..d0731d973f1f 100644
--- a/arch/arm/mach-shmobile/include/mach/sh7372.h
+++ b/arch/arm/mach-shmobile/include/mach/sh7372.h
@@ -499,6 +499,7 @@ extern struct sh7372_pm_domain sh7372_d4;
 extern struct sh7372_pm_domain sh7372_a4r;
 extern struct sh7372_pm_domain sh7372_a3rv;
 extern struct sh7372_pm_domain sh7372_a3ri;
+extern struct sh7372_pm_domain sh7372_a4s;
 extern struct sh7372_pm_domain sh7372_a3sp;
 extern struct sh7372_pm_domain sh7372_a3sg;
 
@@ -515,5 +516,7 @@ extern void sh7372_pm_add_subdomain(struct sh7372_pm_domain *sh7372_pd,
 
 extern void sh7372_intcs_suspend(void);
 extern void sh7372_intcs_resume(void);
+extern void sh7372_intca_suspend(void);
+extern void sh7372_intca_resume(void);
 
 #endif /* __ASM_SH7372_H__ */
diff --git a/arch/arm/mach-shmobile/intc-sh7372.c b/arch/arm/mach-shmobile/intc-sh7372.c
index 2d8856df80e2..d087b31b5d12 100644
--- a/arch/arm/mach-shmobile/intc-sh7372.c
+++ b/arch/arm/mach-shmobile/intc-sh7372.c
@@ -611,3 +611,52 @@ void sh7372_intcs_resume(void)
         for (k = 0x80; k <= 0x9c; k += 4)
                 __raw_writeb(ffd5[k], intcs_ffd5 + k);
 }
+
+static unsigned short e694[0x200];
+static unsigned short e695[0x200];
+
+void sh7372_intca_suspend(void)
+{
+        int k;
+
+        for (k = 0x00; k <= 0x38; k += 4)
+                e694[k] = __raw_readw(0xe6940000 + k);
+
+        for (k = 0x80; k <= 0xb4; k += 4)
+                e694[k] = __raw_readb(0xe6940000 + k);
+
+        for (k = 0x180; k <= 0x1b4; k += 4)
+                e694[k] = __raw_readb(0xe6940000 + k);
+
+        for (k = 0x00; k <= 0x50; k += 4)
+                e695[k] = __raw_readw(0xe6950000 + k);
+
+        for (k = 0x80; k <= 0xa8; k += 4)
+                e695[k] = __raw_readb(0xe6950000 + k);
+
+        for (k = 0x180; k <= 0x1a8; k += 4)
+                e695[k] = __raw_readb(0xe6950000 + k);
+}
+
+void sh7372_intca_resume(void)
+{
+        int k;
+
+        for (k = 0x00; k <= 0x38; k += 4)
+                __raw_writew(e694[k], 0xe6940000 + k);
+
+        for (k = 0x80; k <= 0xb4; k += 4)
+                __raw_writeb(e694[k], 0xe6940000 + k);
+
+        for (k = 0x180; k <= 0x1b4; k += 4)
+                __raw_writeb(e694[k], 0xe6940000 + k);
+
+        for (k = 0x00; k <= 0x50; k += 4)
+                __raw_writew(e695[k], 0xe6950000 + k);
+
+        for (k = 0x80; k <= 0xa8; k += 4)
+                __raw_writeb(e695[k], 0xe6950000 + k);
+
+        for (k = 0x180; k <= 0x1a8; k += 4)
+                __raw_writeb(e695[k], 0xe6950000 + k);
+}
diff --git a/arch/arm/mach-shmobile/pm-sh7372.c b/arch/arm/mach-shmobile/pm-sh7372.c
index f742c61c8902..1e659d7360d1 100644
--- a/arch/arm/mach-shmobile/pm-sh7372.c
+++ b/arch/arm/mach-shmobile/pm-sh7372.c
@@ -256,6 +256,14 @@ struct sh7372_pm_domain sh7372_a3ri = {
         .bit_shift = 8,
 };
 
+struct sh7372_pm_domain sh7372_a4s = {
+        .genpd.name = "A4S",
+        .bit_shift = 10,
+        .gov = &pm_domain_always_on_gov,
+        .no_debug = true,
+        .stay_on = true,
+};
+
 struct sh7372_pm_domain sh7372_a3sp = {
         .genpd.name = "A3SP",
         .bit_shift = 11,
@@ -289,11 +297,16 @@ static int sh7372_do_idle_core_standby(unsigned long unused)
         return 0;
 }
 
-static void sh7372_enter_core_standby(void)
+static void sh7372_set_reset_vector(unsigned long address)
 {
         /* set reset vector, translate 4k */
-        __raw_writel(__pa(sh7372_resume_core_standby_a3sm), SBAR);
+        __raw_writel(address, SBAR);
         __raw_writel(0, APARMBAREA);
+}
+
+static void sh7372_enter_core_standby(void)
+{
+        sh7372_set_reset_vector(__pa(sh7372_resume_core_standby_sysc));
 
         /* enter sleep mode with SYSTBCR to 0x10 */
         __raw_writel(0x10, SYSTBCR);
@@ -306,27 +319,22 @@ static void sh7372_enter_core_standby(void)
 #endif
 
 #ifdef CONFIG_SUSPEND
-static void sh7372_enter_a3sm_common(int pllc0_on)
+static void sh7372_enter_sysc(int pllc0_on, unsigned long sleep_mode)
 {
-        /* set reset vector, translate 4k */
-        __raw_writel(__pa(sh7372_resume_core_standby_a3sm), SBAR);
-        __raw_writel(0, APARMBAREA);
-
         if (pllc0_on)
                 __raw_writel(0, PLLC01STPCR);
         else
                 __raw_writel(1 << 28, PLLC01STPCR);
 
-        __raw_writel(0, PDNSEL); /* power-down A3SM only, not A4S */
         __raw_readl(WUPSFAC); /* read wakeup int. factor before sleep */
-        cpu_suspend(0, sh7372_do_idle_a3sm);
+        cpu_suspend(sleep_mode, sh7372_do_idle_sysc);
         __raw_readl(WUPSFAC); /* read wakeup int. factor after wakeup */
 
          /* disable reset vector translation */
         __raw_writel(0, SBAR);
 }
 
-static int sh7372_a3sm_valid(unsigned long *mskp, unsigned long *msk2p)
+static int sh7372_sysc_valid(unsigned long *mskp, unsigned long *msk2p)
 {
         unsigned long mstpsr0, mstpsr1, mstpsr2, mstpsr3, mstpsr4;
         unsigned long msk, msk2;
@@ -414,7 +422,7 @@ static void sh7372_icr_to_irqcr(unsigned long icr, u16 *irqcr1p, u16 *irqcr2p)
         *irqcr2p = irqcr2;
 }
 
-static void sh7372_setup_a3sm(unsigned long msk, unsigned long msk2)
+static void sh7372_setup_sysc(unsigned long msk, unsigned long msk2)
 {
         u16 irqcrx_low, irqcrx_high, irqcry_low, irqcry_high;
         unsigned long tmp;
@@ -447,6 +455,22 @@ static void sh7372_setup_a3sm(unsigned long msk, unsigned long msk2)
         __raw_writel((irqcrx_high << 16) | irqcrx_low, IRQCR3);
         __raw_writel((irqcry_high << 16) | irqcry_low, IRQCR4);
 }
+
+static void sh7372_enter_a3sm_common(int pllc0_on)
+{
+        sh7372_set_reset_vector(__pa(sh7372_resume_core_standby_sysc));
+        sh7372_enter_sysc(pllc0_on, 1 << 12);
+}
+
+static void sh7372_enter_a4s_common(int pllc0_on)
+{
+        sh7372_intca_suspend();
+        memcpy((void *)SMFRAM, sh7372_resume_core_standby_sysc, 0x100);
+        sh7372_set_reset_vector(SMFRAM);
+        sh7372_enter_sysc(pllc0_on, 1 << 10);
+        sh7372_intca_resume();
+}
+
 #endif
 
 #ifdef CONFIG_CPU_IDLE
@@ -480,14 +504,20 @@ static int sh7372_enter_suspend(suspend_state_t suspend_state)
         unsigned long msk, msk2;
 
         /* check active clocks to determine potential wakeup sources */
-        if (sh7372_a3sm_valid(&msk, &msk2)) {
-
+        if (sh7372_sysc_valid(&msk, &msk2)) {
                 /* convert INTC mask and sense to SYSC mask and sense */
-                sh7372_setup_a3sm(msk, msk2);
-
-                /* enter A3SM sleep with PLLC0 off */
-                pr_debug("entering A3SM\n");
-                sh7372_enter_a3sm_common(0);
+                sh7372_setup_sysc(msk, msk2);
+
+                if (!sh7372_a3sp.stay_on &&
+                    sh7372_a4s.genpd.status == GPD_STATE_POWER_OFF) {
+                        /* enter A4S sleep with PLLC0 off */
+                        pr_debug("entering A4S\n");
+                        sh7372_enter_a4s_common(0);
+                } else {
+                        /* enter A3SM sleep with PLLC0 off */
+                        pr_debug("entering A3SM\n");
+                        sh7372_enter_a3sm_common(0);
+                }
         } else {
                 /* default to Core Standby that supports all wakeup sources */
                 pr_debug("entering Core Standby\n");
diff --git a/arch/arm/mach-shmobile/setup-sh7372.c b/arch/arm/mach-shmobile/setup-sh7372.c
index 2380389e6ac5..c197f9d29d04 100644
--- a/arch/arm/mach-shmobile/setup-sh7372.c
+++ b/arch/arm/mach-shmobile/setup-sh7372.c
@@ -994,12 +994,16 @@ void __init sh7372_add_standard_devices(void)
         sh7372_init_pm_domain(&sh7372_a4r);
         sh7372_init_pm_domain(&sh7372_a3rv);
         sh7372_init_pm_domain(&sh7372_a3ri);
-        sh7372_init_pm_domain(&sh7372_a3sg);
+        sh7372_init_pm_domain(&sh7372_a4s);
         sh7372_init_pm_domain(&sh7372_a3sp);
+        sh7372_init_pm_domain(&sh7372_a3sg);
 
         sh7372_pm_add_subdomain(&sh7372_a4lc, &sh7372_a3rv);
         sh7372_pm_add_subdomain(&sh7372_a4r, &sh7372_a4lc);
 
+        sh7372_pm_add_subdomain(&sh7372_a4s, &sh7372_a3sg);
+        sh7372_pm_add_subdomain(&sh7372_a4s, &sh7372_a3sp);
+
         platform_add_devices(sh7372_early_devices,
                             ARRAY_SIZE(sh7372_early_devices));
 
diff --git a/arch/arm/mach-shmobile/sleep-sh7372.S b/arch/arm/mach-shmobile/sleep-sh7372.S
index f3ab3c5810ea..1d564674451d 100644
--- a/arch/arm/mach-shmobile/sleep-sh7372.S
+++ b/arch/arm/mach-shmobile/sleep-sh7372.S
@@ -37,13 +37,18 @@
 #if defined(CONFIG_SUSPEND) || defined(CONFIG_CPU_IDLE)
         .align  12
         .text
-        .global sh7372_resume_core_standby_a3sm
-sh7372_resume_core_standby_a3sm:
+        .global sh7372_resume_core_standby_sysc
+sh7372_resume_core_standby_sysc:
         ldr     pc, 1f
 1:      .long   cpu_resume - PAGE_OFFSET + PLAT_PHYS_OFFSET
 
-        .global sh7372_do_idle_a3sm
-sh7372_do_idle_a3sm:
+#define SPDCR 0xe6180008
+
+        /* A3SM & A4S power down */
+        .global sh7372_do_idle_sysc
+sh7372_do_idle_sysc:
+        mov     r8, r0 /* sleep mode passed in r0 */
+
         /*
          * Clear the SCTLR.C bit to prevent further data cache
          * allocation. Clearing SCTLR.C would make all the data accesses
@@ -80,13 +85,9 @@ sh7372_do_idle_a3sm:
         dsb
         dmb
 
-#define SPDCR 0xe6180008
-#define A3SM (1 << 12)
-
-        /* A3SM power down */
+        /* SYSC power down */
         ldr     r0, =SPDCR
-        ldr     r1, =A3SM
-        str     r1, [r0]
+        str     r8, [r0]
 1:
         b      1b