1 files changed, 337 insertions, 0 deletions
diff --git a/plat/hisilicon/hikey960/hikey960_pm.c b/plat/hisilicon/hikey960/hikey960_pm.c
new file mode 100644
index 0000000..f836508
--- /dev/null
+++ b/plat/hisilicon/hikey960/hikey960_pm.c
@@ -0,0 +1,337 @@
+/*
+ * Copyright (c) 2017, 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/pl011.h>
+#include <drivers/arm/pl061_gpio.h>
+#include <drivers/delay_timer.h>
+#include <lib/mmio.h>
+#include <lib/psci/psci.h>
+
+#include <hi3660.h>
+#include <hi3660_crg.h>
+
+#include "drivers/pwrc/hisi_pwrc.h"
+#include "hikey960_def.h"
+#include "hikey960_private.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])
+
+#define DMAC_GLB_REG_SEC	0x694
+#define AXI_CONF_BASE		0x820
+
+static unsigned int uart_base;
+static console_t console;
+static uintptr_t hikey960_sec_entrypoint;
+
+static void hikey960_pwr_domain_standby(plat_local_state_t cpu_state)
+{
+	unsigned long scr;
+
+	scr = read_scr_el3();
+
+	/* Enable Physical IRQ and FIQ to wake the CPU */
+	write_scr_el3(scr | SCR_IRQ_BIT | SCR_FIQ_BIT);
+
+	/* Add barrier before CPU enter WFI state */
+	isb();
+	dsb();
+	wfi();
+
+	/*
+	 * Restore SCR to the original value, synchronisazion of
+	 * scr_el3 is done by eret while el3_exit to save some
+	 * execution cycles.
+	 */
+	write_scr_el3(scr);
+}
+
+static int hikey960_pwr_domain_on(u_register_t mpidr)
+{
+	unsigned int core = mpidr & MPIDR_CPU_MASK;
+	unsigned int cluster =
+		(mpidr & MPIDR_CLUSTER_MASK) >> MPIDR_AFFINITY_BITS;
+	int cluster_stat = cluster_is_powered_on(cluster);
+
+	hisi_set_cpu_boot_flag(cluster, core);
+
+	mmio_write_32(CRG_REG_BASE + CRG_RVBAR(cluster, core),
+		      hikey960_sec_entrypoint >> 2);
+
+	if (cluster_stat)
+		hisi_powerup_core(cluster, core);
+	else
+		hisi_powerup_cluster(cluster, core);
+
+	return PSCI_E_SUCCESS;
+}
+
+static void
+hikey960_pwr_domain_on_finish(const psci_power_state_t *target_state)
+{
+	if (CLUSTER_PWR_STATE(target_state) == PLAT_MAX_OFF_STATE)
+		cci_enable_snoop_dvm_reqs(MPIDR_AFFLVL1_VAL(read_mpidr_el1()));
+
+	gicv2_pcpu_distif_init();
+	gicv2_cpuif_enable();
+}
+
+void hikey960_pwr_domain_off(const psci_power_state_t *target_state)
+{
+	unsigned long mpidr = read_mpidr_el1();
+	unsigned int core = mpidr & MPIDR_CPU_MASK;
+	unsigned int cluster =
+		(mpidr & MPIDR_CLUSTER_MASK) >> MPIDR_AFFINITY_BITS;
+
+	clr_ex();
+	isb();
+	dsbsy();
+
+	gicv2_cpuif_disable();
+
+	hisi_clear_cpu_boot_flag(cluster, core);
+	hisi_powerdn_core(cluster, core);
+
+	/* check if any core is powered up */
+	if (hisi_test_cpu_down(cluster, core)) {
+
+		cci_disable_snoop_dvm_reqs(MPIDR_AFFLVL1_VAL(read_mpidr_el1()));
+
+		isb();
+		dsbsy();
+
+		hisi_powerdn_cluster(cluster, core);
+	}
+}
+
+static void __dead2 hikey960_system_off(void)
+{
+	gpio_set_direction(176, GPIO_DIR_OUT);
+	gpio_set_value(176, GPIO_LEVEL_LOW);
+	panic();
+}
+
+static void __dead2 hikey960_system_reset(void)
+{
+	dsb();
+	isb();
+	mdelay(2000);
+	mmio_write_32(SCTRL_SCPEREN1_REG,
+		      SCPEREN1_WAIT_DDR_SELFREFRESH_DONE_BYPASS);
+	mmio_write_32(SCTRL_SCSYSSTAT_REG, 0xdeadbeef);
+	panic();
+}
+
+int hikey960_validate_power_state(unsigned int power_state,
+			       psci_power_state_t *req_state)
+{
+	unsigned int pstate = psci_get_pstate_type(power_state);
+	unsigned 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 hikey960_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 void hikey960_pwr_domain_suspend(const psci_power_state_t *target_state)
+{
+	u_register_t mpidr = read_mpidr_el1();
+	unsigned int core = 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) {
+		clr_ex();
+		isb();
+		dsbsy();
+
+		gicv2_cpuif_disable();
+
+		hisi_cpuidle_lock(cluster, core);
+		hisi_set_cpuidle_flag(cluster, core);
+		hisi_cpuidle_unlock(cluster, core);
+
+		mmio_write_32(CRG_REG_BASE + CRG_RVBAR(cluster, core),
+		      hikey960_sec_entrypoint >> 2);
+
+		hisi_enter_core_idle(cluster, core);
+	}
+
+	/* Perform the common cluster specific operations */
+	if (CLUSTER_PWR_STATE(target_state) == PLAT_MAX_OFF_STATE) {
+		hisi_cpuidle_lock(cluster, core);
+		hisi_disable_pdc(cluster);
+
+		/* check if any core is powered up */
+		if (hisi_test_pwrdn_allcores(cluster, core)) {
+
+			cci_disable_snoop_dvm_reqs(MPIDR_AFFLVL1_VAL(mpidr));
+
+			isb();
+			dsbsy();
+
+			/* mask the pdc wakeup irq, then
+			 * enable pdc to power down the core
+			 */
+			hisi_pdc_mask_cluster_wakeirq(cluster);
+			hisi_enable_pdc(cluster);
+
+			hisi_cpuidle_unlock(cluster, core);
+
+			/* check the SR flag bit to determine
+			 * CLUSTER_IDLE_IPC or AP_SR_IPC to send
+			 */
+			if (hisi_test_ap_suspend_flag())
+				hisi_enter_ap_suspend(cluster, core);
+			else
+				hisi_enter_cluster_idle(cluster, core);
+		} else {
+			/* enable pdc */
+			hisi_enable_pdc(cluster);
+			hisi_cpuidle_unlock(cluster, core);
+		}
+	}
+}
+
+static void hikey960_sr_dma_reinit(void)
+{
+	unsigned int ctr = 0;
+
+	mmio_write_32(DMAC_BASE + DMAC_GLB_REG_SEC, 0x3);
+
+	/* 1~15 channel is set non_secure */
+	for (ctr = 1; ctr <= 15; ctr++)
+		mmio_write_32(DMAC_BASE + AXI_CONF_BASE + ctr * (0x40),
+			      (1 << 6) | (1 << 18));
+}
+
+static void
+hikey960_pwr_domain_suspend_finish(const psci_power_state_t *target_state)
+{
+	unsigned long mpidr = read_mpidr_el1();
+	unsigned int core = mpidr & MPIDR_CPU_MASK;
+	unsigned int cluster =
+		(mpidr & MPIDR_CLUSTER_MASK) >> MPIDR_AFFINITY_BITS;
+
+	/* Nothing to be done on waking up from retention from CPU level */
+	if (CORE_PWR_STATE(target_state) != PLAT_MAX_OFF_STATE)
+		return;
+
+	hisi_cpuidle_lock(cluster, core);
+	hisi_clear_cpuidle_flag(cluster, core);
+	hisi_cpuidle_unlock(cluster, core);
+
+	if (hisi_test_ap_suspend_flag()) {
+		hikey960_sr_dma_reinit();
+		gicv2_cpuif_enable();
+		console_pl011_register(uart_base, PL011_UART_CLK_IN_HZ,
+				       PL011_BAUDRATE, &console);
+	}
+
+	hikey960_pwr_domain_on_finish(target_state);
+}
+
+static void hikey960_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 const plat_psci_ops_t hikey960_psci_ops = {
+	.cpu_standby			= hikey960_pwr_domain_standby,
+	.pwr_domain_on			= hikey960_pwr_domain_on,
+	.pwr_domain_on_finish		= hikey960_pwr_domain_on_finish,
+	.pwr_domain_off			= hikey960_pwr_domain_off,
+	.pwr_domain_suspend		= hikey960_pwr_domain_suspend,
+	.pwr_domain_suspend_finish	= hikey960_pwr_domain_suspend_finish,
+	.system_off			= hikey960_system_off,
+	.system_reset			= hikey960_system_reset,
+	.validate_power_state		= hikey960_validate_power_state,
+	.validate_ns_entrypoint		= hikey960_validate_ns_entrypoint,
+	.get_sys_suspend_power_state	= hikey960_get_sys_suspend_power_state,
+};
+
+int plat_setup_psci_ops(uintptr_t sec_entrypoint,
+			const plat_psci_ops_t **psci_ops)
+{
+	unsigned int id = 0;
+	int ret;
+
+	ret = hikey960_read_boardid(&id);
+	if (ret == 0) {
+		if (id == 5300U)
+			uart_base = PL011_UART5_BASE;
+		else
+			uart_base = PL011_UART6_BASE;
+	} else {
+		uart_base = PL011_UART6_BASE;
+	}
+
+	hikey960_sec_entrypoint = sec_entrypoint;
+
+	INFO("%s: sec_entrypoint=0x%lx\n", __func__,
+	     (unsigned long)hikey960_sec_entrypoint);
+
+	/*
+	 * Initialize PSCI ops struct
+	 */
+	*psci_ops = &hikey960_psci_ops;
+	return 0;
+}