hikey: pm: finish PSCI hook functions

This patch is to enable CPU suspend/resume and system level's
suspend/resume; also enable system power off state.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>

2 files changed, 132 insertions, 47 deletions

diff --git a/plat/hisilicon/hikey/hikey_pm.c b/plat/hisilicon/hikey/hikey_pm.c
index 9b4ef5bf..c796e8a5 100644
--- a/plat/hisilicon/hikey/hikey_pm.c
+++ b/plat/hisilicon/hikey/hikey_pm.c
@@ -15,21 +15,19 @@
 #include <hisi_sram_map.h>
 #include <mmio.h>
 #include <psci.h>
+#include <sp804_delay_timer.h>
 
 #include "hikey_def.h"
 
-#define HIKEY_CLUSTER_STATE_ON		0
-#define HIKEY_CLUSTER_STATE_OFF		1
+#define CORE_PWR_STATE(state) \
+	((state)->pwr_domain_state[MPIDR_AFFLVL0])
+#define CLUSTER_PWR_STATE(state) \
+	((state)->pwr_domain_state[MPIDR_AFFLVL1])
+#define SYSTEM_PWR_STATE(state) \
+	((state)->pwr_domain_state[PLAT_MAX_PWR_LVL])
 
 static uintptr_t hikey_sec_entrypoint;
-/* There're two clusters in HiKey. */
-static int hikey_cluster_state[] = {HIKEY_CLUSTER_STATE_OFF,
-				    HIKEY_CLUSTER_STATE_OFF};
-
-/*******************************************************************************
- * Handler called when a power domain is about to be turned on. The
- * level and mpidr determine the affinity instance.
- ******************************************************************************/
+
 static int hikey_pwr_domain_on(u_register_t mpidr)
 {
 	int cpu, cluster;
@@ -54,14 +52,14 @@ static void hikey_pwr_domain_on_finish(const psci_power_state_t *target_state)
 	mpidr = read_mpidr();
 	cluster = MPIDR_AFFLVL1_VAL(mpidr);
 	cpu = MPIDR_AFFLVL0_VAL(mpidr);
-	if (hikey_cluster_state[cluster] == HIKEY_CLUSTER_STATE_OFF) {
-		/*
-		 * Enable CCI coherency for this cluster.
-		 * No need for locks as no other cpu is active at the moment.
-		 */
+
+
+	/*
+	 * Enable CCI coherency for this cluster.
+	 * No need for locks as no other cpu is active at the moment.
+	 */
+	if (CLUSTER_PWR_STATE(target_state) == PLAT_MAX_OFF_STATE)
 		cci_enable_snoop_dvm_reqs(MPIDR_AFFLVL1_VAL(mpidr));
-		hikey_cluster_state[cluster] = HIKEY_CLUSTER_STATE_ON;
-	}
 
 	/* Zero the jump address in the mailbox for this cpu */
 	hisi_pwrc_set_core_bx_addr(cpu, cluster, 0);
@@ -72,35 +70,133 @@ static void hikey_pwr_domain_on_finish(const psci_power_state_t *target_state)
 	gicv2_cpuif_enable();
 }
 
-/*******************************************************************************
- * Handler called when a power domain is about to be turned off. The
- * target_state encodes the power state that each level should transition to.
- ******************************************************************************/
 void hikey_pwr_domain_off(const psci_power_state_t *target_state)
 {
 	unsigned long mpidr;
 	int cpu, cluster;
 
-	gicv2_cpuif_disable();
-
 	mpidr = read_mpidr();
 	cluster = MPIDR_AFFLVL1_VAL(mpidr);
 	cpu = MPIDR_AFFLVL0_VAL(mpidr);
-	if (target_state->pwr_domain_state[MPIDR_AFFLVL1] ==
-	    PLAT_MAX_OFF_STATE) {
+
+	gicv2_cpuif_disable();
+	hisi_ipc_cpu_off(cpu, cluster);
+
+	if (CLUSTER_PWR_STATE(target_state) == PLAT_MAX_OFF_STATE) {
 		hisi_ipc_spin_lock(HISI_IPC_SEM_CPUIDLE);
 		cci_disable_snoop_dvm_reqs(MPIDR_AFFLVL1_VAL(mpidr));
 		hisi_ipc_spin_unlock(HISI_IPC_SEM_CPUIDLE);
 
 		hisi_ipc_cluster_off(cpu, cluster);
-		hikey_cluster_state[cluster] = HIKEY_CLUSTER_STATE_OFF;
 	}
-	hisi_ipc_cpu_off(cpu, cluster);
 }
 
-/*******************************************************************************
- * Handler to reboot the system.
- ******************************************************************************/
+static void hikey_pwr_domain_suspend(const psci_power_state_t *target_state)
+{
+	u_register_t mpidr = read_mpidr_el1();
+	unsigned int cpu = mpidr & MPIDR_CPU_MASK;
+	unsigned int cluster =
+		(mpidr & MPIDR_CLUSTER_MASK) >> MPIDR_AFFINITY_BITS;
+
+	if (CORE_PWR_STATE(target_state) != PLAT_MAX_OFF_STATE)
+		return;
+
+	if (CORE_PWR_STATE(target_state) == PLAT_MAX_OFF_STATE) {
+
+		/* Program the jump address for the target cpu */
+		hisi_pwrc_set_core_bx_addr(cpu, cluster, hikey_sec_entrypoint);
+
+		gicv2_cpuif_disable();
+
+		if (SYSTEM_PWR_STATE(target_state) != PLAT_MAX_OFF_STATE)
+			hisi_ipc_cpu_suspend(cpu, cluster);
+	}
+
+	/* Perform the common cluster specific operations */
+	if (CLUSTER_PWR_STATE(target_state) == PLAT_MAX_OFF_STATE) {
+		hisi_ipc_spin_lock(HISI_IPC_SEM_CPUIDLE);
+		cci_disable_snoop_dvm_reqs(MPIDR_AFFLVL1_VAL(mpidr));
+		hisi_ipc_spin_unlock(HISI_IPC_SEM_CPUIDLE);
+
+		if (SYSTEM_PWR_STATE(target_state) == PLAT_MAX_OFF_STATE) {
+			hisi_pwrc_set_cluster_wfi(1);
+			hisi_pwrc_set_cluster_wfi(0);
+			hisi_ipc_psci_system_off();
+		} else
+			hisi_ipc_cluster_suspend(cpu, cluster);
+	}
+}
+
+static void hikey_pwr_domain_suspend_finish(const psci_power_state_t *target_state)
+{
+	unsigned long mpidr;
+	unsigned int cluster, cpu;
+
+	/* Nothing to be done on waking up from retention from CPU level */
+	if (CORE_PWR_STATE(target_state) != PLAT_MAX_OFF_STATE)
+		return;
+
+	/* Get the mpidr for this cpu */
+	mpidr = read_mpidr_el1();
+	cluster = (mpidr & MPIDR_CLUSTER_MASK) >> MPIDR_AFF1_SHIFT;
+	cpu = mpidr & MPIDR_CPU_MASK;
+
+	/* Enable CCI coherency for cluster */
+	if (CLUSTER_PWR_STATE(target_state) == PLAT_MAX_OFF_STATE)
+		cci_enable_snoop_dvm_reqs(MPIDR_AFFLVL1_VAL(mpidr));
+
+	hisi_pwrc_set_core_bx_addr(cpu, cluster, 0);
+
+	if (SYSTEM_PWR_STATE(target_state) == PLAT_MAX_OFF_STATE) {
+		gicv2_distif_init();
+		gicv2_pcpu_distif_init();
+		gicv2_cpuif_enable();
+	} else {
+		gicv2_pcpu_distif_init();
+		gicv2_cpuif_enable();
+	}
+}
+
+static void hikey_get_sys_suspend_power_state(psci_power_state_t *req_state)
+{
+	int i;
+
+	for (i = MPIDR_AFFLVL0; i <= PLAT_MAX_PWR_LVL; i++)
+		req_state->pwr_domain_state[i] = PLAT_MAX_OFF_STATE;
+}
+
+static void __dead2 hikey_system_off(void)
+{
+	NOTICE("%s: off system\n", __func__);
+
+	/* Pull down GPIO_0_0 to trigger PMIC shutdown */
+	mmio_write_32(0xF8001810, 0x2); /* Pinmux */
+	mmio_write_8(0xF8011400, 1);	/* Pin direction */
+	mmio_write_8(0xF8011004, 0);	/* Pin output value */
+
+	/* Wait for 2s to power off system by PMIC */
+	sp804_timer_init(SP804_TIMER0_BASE, 10, 192);
+	mdelay(2000);
+
+	/*
+	 * PMIC shutdown depends on two conditions: GPIO_0_0 (PWR_HOLD) low,
+	 * and VBUS_DET < 3.6V. For HiKey, VBUS_DET is connected to VDD_4V2
+	 * through Jumper 1-2. So, to complete shutdown, user needs to manually
+	 * remove Jumper 1-2.
+	 */
+	NOTICE("+------------------------------------------+\n");
+	NOTICE("| IMPORTANT: Remove Jumper 1-2 to shutdown |\n");
+	NOTICE("| DANGER:    SoC is still burning. DANGER! |\n");
+	NOTICE("| Board will be reboot to avoid overheat   |\n");
+	NOTICE("+------------------------------------------+\n");
+
+	/* Send the system reset request */
+	mmio_write_32(AO_SC_SYS_STAT0, 0x48698284);
+
+	wfi();
+	panic();
+}
+
 static void __dead2 hikey_system_reset(void)
 {
 	/* Send the system reset request */
@@ -112,9 +208,6 @@ static void __dead2 hikey_system_reset(void)
 	panic();
 }
 
-/*******************************************************************************
- * Handler called to check the validity of the power state parameter.
- ******************************************************************************/
 int hikey_validate_power_state(unsigned int power_state,
 			       psci_power_state_t *req_state)
 {
@@ -153,9 +246,6 @@ int hikey_validate_power_state(unsigned int power_state,
 	return PSCI_E_SUCCESS;
 }
 
-/*******************************************************************************
- * Handler called to check the validity of the non secure entrypoint.
- ******************************************************************************/
 static int hikey_validate_ns_entrypoint(uintptr_t entrypoint)
 {
 	/*
@@ -168,26 +258,20 @@ static int hikey_validate_ns_entrypoint(uintptr_t entrypoint)
 	return PSCI_E_INVALID_ADDRESS;
 }
 
-/*******************************************************************************
- * Export the platform handlers to enable psci to invoke them
- ******************************************************************************/
 static const plat_psci_ops_t hikey_psci_ops = {
 	.cpu_standby			= NULL,
 	.pwr_domain_on			= hikey_pwr_domain_on,
 	.pwr_domain_on_finish		= hikey_pwr_domain_on_finish,
 	.pwr_domain_off			= hikey_pwr_domain_off,
-	.pwr_domain_suspend		= NULL,
-	.pwr_domain_suspend_finish	= NULL,
-	.system_off			= NULL,
+	.pwr_domain_suspend		= hikey_pwr_domain_suspend,
+	.pwr_domain_suspend_finish	= hikey_pwr_domain_suspend_finish,
+	.system_off			= hikey_system_off,
 	.system_reset			= hikey_system_reset,
 	.validate_power_state		= hikey_validate_power_state,
 	.validate_ns_entrypoint		= hikey_validate_ns_entrypoint,
-	.get_sys_suspend_power_state	= NULL,
+	.get_sys_suspend_power_state	= hikey_get_sys_suspend_power_state,
 };
 
-/*******************************************************************************
- * Export the platform specific power ops and initialize Power Controller
- ******************************************************************************/
 int plat_setup_psci_ops(uintptr_t sec_entrypoint,
 			const plat_psci_ops_t **psci_ops)
 {
@@ -197,6 +281,5 @@ int plat_setup_psci_ops(uintptr_t sec_entrypoint,
 	 * Initialize PSCI ops struct
 	 */
 	*psci_ops = &hikey_psci_ops;
-
 	return 0;
 }
diff --git a/plat/hisilicon/hikey/platform.mk b/plat/hisilicon/hikey/platform.mk
index ec4bb5ca..fb5f8525 100644
--- a/plat/hisilicon/hikey/platform.mk
+++ b/plat/hisilicon/hikey/platform.mk
@@ -65,6 +65,8 @@ HIKEY_GIC_SOURCES	:=	drivers/arm/gic/common/gic_common.c	\
 				plat/common/plat_gicv2.c
 
 BL31_SOURCES		+=	drivers/arm/cci/cci.c			\
+				drivers/arm/sp804/sp804_delay_timer.c	\
+				drivers/delay_timer/delay_timer.c	\
 				lib/cpus/aarch64/cortex_a53.S		\
 				plat/common/aarch64/plat_psci_common.c	\
 				plat/hisilicon/hikey/aarch64/hikey_helpers.S \