1 files changed, 288 insertions, 0 deletions
diff --git a/plat/hisilicon/hikey/hikey_pm.c b/plat/hisilicon/hikey/hikey_pm.c
new file mode 100644
index 0000000..05c1e7f
--- /dev/null
+++ b/plat/hisilicon/hikey/hikey_pm.c
@@ -0,0 +1,288 @@
+/*
+ * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+
+#include <arch_helpers.h>
+#include <common/debug.h>
+#include <drivers/arm/cci.h>
+#include <drivers/arm/gicv2.h>
+#include <drivers/arm/sp804_delay_timer.h>
+#include <lib/mmio.h>
+#include <lib/psci/psci.h>
+
+#include <hi6220.h>
+#include <hikey_def.h>
+#include <hisi_ipc.h>
+#include <hisi_pwrc.h>
+#include <hisi_sram_map.h>
+
+#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;
+
+static int hikey_pwr_domain_on(u_register_t mpidr)
+{
+	int cpu, cluster;
+	int curr_cluster;
+
+	cluster = MPIDR_AFFLVL1_VAL(mpidr);
+	cpu = MPIDR_AFFLVL0_VAL(mpidr);
+	curr_cluster = MPIDR_AFFLVL1_VAL(read_mpidr());
+	if (cluster != curr_cluster)
+		hisi_ipc_cluster_on(cpu, cluster);
+
+	hisi_pwrc_set_core_bx_addr(cpu, cluster, hikey_sec_entrypoint);
+	hisi_pwrc_enable_debug(cpu, cluster);
+	hisi_ipc_cpu_on(cpu, cluster);
+
+	return 0;
+}
+
+static void hikey_pwr_domain_on_finish(const psci_power_state_t *target_state)
+{
+	unsigned long mpidr;
+	int cpu, cluster;
+
+	mpidr = read_mpidr();
+	cluster = MPIDR_AFFLVL1_VAL(mpidr);
+	cpu = MPIDR_AFFLVL0_VAL(mpidr);
+
+
+	/*
+	 * 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));
+
+	/* Zero the jump address in the mailbox for this cpu */
+	hisi_pwrc_set_core_bx_addr(cpu, cluster, 0);
+
+	/* Program the GIC per-cpu distributor or re-distributor interface */
+	gicv2_pcpu_distif_init();
+	/* Enable the GIC cpu interface */
+	gicv2_cpuif_enable();
+}
+
+void hikey_pwr_domain_off(const psci_power_state_t *target_state)
+{
+	unsigned long mpidr;
+	int cpu, cluster;
+
+	mpidr = read_mpidr();
+	cluster = MPIDR_AFFLVL1_VAL(mpidr);
+	cpu = MPIDR_AFFLVL0_VAL(mpidr);
+
+	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);
+	}
+}
+
+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 */
+	mmio_write_32(AO_SC_SYS_STAT0, 0x48698284);
+	isb();
+	dsb();
+
+	wfi();
+	panic();
+}
+
+int hikey_validate_power_state(unsigned int power_state,
+			       psci_power_state_t *req_state)
+{
+	int pstate = psci_get_pstate_type(power_state);
+	int pwr_lvl = psci_get_pstate_pwrlvl(power_state);
+	int i;
+
+	assert(req_state);
+
+	if (pwr_lvl > PLAT_MAX_PWR_LVL)
+		return PSCI_E_INVALID_PARAMS;
+
+	/* Sanity check the requested state */
+	if (pstate == PSTATE_TYPE_STANDBY) {
+		/*
+		 * It's possible to enter standby only on power level 0
+		 * Ignore any other power level.
+		 */
+		if (pwr_lvl != MPIDR_AFFLVL0)
+			return PSCI_E_INVALID_PARAMS;
+
+		req_state->pwr_domain_state[MPIDR_AFFLVL0] =
+					PLAT_MAX_RET_STATE;
+	} else {
+		for (i = MPIDR_AFFLVL0; i <= pwr_lvl; i++)
+			req_state->pwr_domain_state[i] =
+					PLAT_MAX_OFF_STATE;
+	}
+
+	/*
+	 * We expect the 'state id' to be zero.
+	 */
+	if (psci_get_pstate_id(power_state))
+		return PSCI_E_INVALID_PARAMS;
+
+	return PSCI_E_SUCCESS;
+}
+
+static int hikey_validate_ns_entrypoint(uintptr_t entrypoint)
+{
+	/*
+	 * Check if the non secure entrypoint lies within the non
+	 * secure DRAM.
+	 */
+	if ((entrypoint > DDR_BASE) && (entrypoint < (DDR_BASE + DDR_SIZE)))
+		return PSCI_E_SUCCESS;
+
+	return PSCI_E_INVALID_ADDRESS;
+}
+
+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		= 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	= hikey_get_sys_suspend_power_state,
+};
+
+int plat_setup_psci_ops(uintptr_t sec_entrypoint,
+			const plat_psci_ops_t **psci_ops)
+{
+	hikey_sec_entrypoint = sec_entrypoint;
+
+	/*
+	 * Initialize PSCI ops struct
+	 */
+	*psci_ops = &hikey_psci_ops;
+	return 0;
+}