1 files changed, 242 insertions, 0 deletions
diff --git a/plat/imx/imx8mq/imx8mq_psci.c b/plat/imx/imx8mq/imx8mq_psci.c
new file mode 100644
index 00000000..d0c3b367
--- /dev/null
+++ b/plat/imx/imx8mq/imx8mq_psci.c
@@ -0,0 +1,242 @@
+/*
+ * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
+ * Copyright 2017 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch.h>
+#include <arch_helpers.h>
+#include <debug.h>
+#include <stdbool.h>
+#include <plat_imx8.h>
+#include <psci.h>
+#include <mmio.h>
+#include <soc.h>
+
+#define SNVS_LPCR	0x38
+
+#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])
+
+const unsigned char imx_power_domain_tree_desc[] = {
+	/* number of root nodes */
+	PWR_DOMAIN_AT_MAX_LVL,
+	/* number of child at the first node */
+	PLATFORM_CLUSTER_COUNT,
+	PLATFORM_CLUSTER0_CORE_COUNT,
+};
+
+int imx_pwr_domain_on(u_register_t mpidr)
+{
+	unsigned int core_id;
+	uint64_t base_addr = BL31_BASE;
+
+	core_id = MPIDR_AFFLVL0_VAL(mpidr);
+
+	/* set the secure entrypoint */
+	imx_set_cpu_secure_entry(core_id, base_addr);
+	/* power up the core */
+	imx_set_cpu_pwr_on(core_id);
+
+	return PSCI_E_SUCCESS;
+}
+
+void imx_pwr_domain_on_finish(const psci_power_state_t *target_state)
+{
+	/* program the GIC per cpu dist and rdist interface */
+	plat_gic_pcpu_init();
+	/* enable the GICv3 cpu interface */
+	plat_gic_cpuif_enable();
+}
+
+void imx_pwr_domain_off(const psci_power_state_t *target_state)
+{
+	uint64_t mpidr = read_mpidr_el1();
+	unsigned int core_id = MPIDR_AFFLVL0_VAL(mpidr);
+
+	/* disable the GIC cpu interface first */
+	plat_gic_cpuif_disable();
+	/* config the core for power down */
+	imx_set_cpu_pwr_off(core_id);
+}
+
+int imx_validate_ns_entrypoint(uintptr_t ns_entrypoint)
+{
+	/* The non-secure entrypoint should be in RAM space */
+	if (ns_entrypoint < 0x40000000)
+		return PSCI_E_INVALID_PARAMS;
+
+	return PSCI_E_SUCCESS;
+}
+
+int imx_validate_power_state(unsigned int power_state,
+			 psci_power_state_t *req_state)
+{
+	int pwr_lvl = psci_get_pstate_pwrlvl(power_state);
+	int pwr_type = psci_get_pstate_type(power_state);
+	int state_id = psci_get_pstate_id(power_state);
+
+	if (pwr_lvl > PLAT_MAX_PWR_LVL)
+		return PSCI_E_INVALID_PARAMS;
+
+	if (pwr_type == PSTATE_TYPE_STANDBY) {
+		CORE_PWR_STATE(req_state) = PLAT_MAX_RET_STATE;
+		CLUSTER_PWR_STATE(req_state) = PLAT_MAX_RET_STATE;
+	}
+
+	if (pwr_type == PSTATE_TYPE_POWERDOWN && state_id == 0x33) {
+		CORE_PWR_STATE(req_state) = PLAT_MAX_OFF_STATE;
+		CLUSTER_PWR_STATE(req_state) = PLAT_MAX_RET_STATE;
+	}
+
+	return PSCI_E_SUCCESS;
+}
+
+void imx_cpu_standby(plat_local_state_t cpu_state)
+{
+	dsb();
+	write_scr_el3(read_scr_el3() | 0x4);
+	isb();
+
+	wfi();
+
+	write_scr_el3(read_scr_el3() & (~0x4));
+	isb();
+}
+
+void imx_domain_suspend(const psci_power_state_t *target_state)
+{
+	uint64_t base_addr = BL31_BASE;
+	uint64_t mpidr = read_mpidr_el1();
+	unsigned int core_id = MPIDR_AFFLVL0_VAL(mpidr);
+
+	if (is_local_state_off(CORE_PWR_STATE(target_state))) {
+		/* disable the cpu interface */
+		plat_gic_cpuif_disable();
+		imx_set_cpu_secure_entry(core_id, base_addr);
+		imx_set_cpu_lpm(core_id, true);
+	} else {
+		/* TODO cluster level clock gate off ? */
+		dsb();
+		write_scr_el3(read_scr_el3() | 0x4);
+		isb();
+	}
+
+	if (is_local_state_off(CLUSTER_PWR_STATE(target_state)))
+		imx_set_cluster_powerdown(core_id, true);
+	else
+		imx_set_cluster_standby(true);
+
+	if (is_local_state_retn(SYSTEM_PWR_STATE(target_state))) {
+		/* put DDR into retention mode */
+		imx_set_sys_lpm(true);
+		imx_anamix_pre_suspend();
+	}
+}
+
+void imx_domain_suspend_finish(const psci_power_state_t *target_state)
+{
+	uint64_t mpidr = read_mpidr_el1();
+	unsigned int core_id = MPIDR_AFFLVL0_VAL(mpidr);
+
+	/* check the system level status */
+	if (is_local_state_retn(SYSTEM_PWR_STATE(target_state))) {
+		imx_set_sys_lpm(false);
+		imx_anamix_post_resume();
+		imx_clear_rbc_count();
+	}
+
+	/* check the cluster level power status */
+	if (is_local_state_off(CLUSTER_PWR_STATE(target_state)))
+		imx_set_cluster_powerdown(core_id, false);
+	else
+		imx_set_cluster_standby(false);
+
+	/* check the core level power status */
+	if (is_local_state_off(CORE_PWR_STATE(target_state))) {
+		/* clear the core lpm setting */
+		imx_set_cpu_lpm(core_id, false);
+		/* enable the gic cpu interface */
+		plat_gic_cpuif_enable();
+	} else {
+		write_scr_el3(read_scr_el3() & (~0x4));
+		isb();
+	}
+}
+
+void imx_get_sys_suspend_power_state(psci_power_state_t *req_state)
+{
+	unsigned int i;
+
+	for (i = IMX_PWR_LVL0; i < PLAT_MAX_PWR_LVL; i++)
+		req_state->pwr_domain_state[i] = PLAT_STOP_OFF_STATE;
+
+	req_state->pwr_domain_state[PLAT_MAX_PWR_LVL] = PLAT_MAX_RET_STATE;
+}
+
+void __dead2 imx_system_reset(void)
+{
+	uintptr_t wdog_base = IMX_WDOG_BASE;
+	unsigned int val;
+
+	/* WDOG_B reset */
+	val = mmio_read_16(wdog_base);
+#ifdef IMX_WDOG_B_RESET
+	val = (val & 0x00FF) | (7 << 2) | (1 << 0);
+#else
+	val = (val & 0x00FF) | (4 << 2) | (1 << 0);
+#endif
+	mmio_write_16(wdog_base, val);
+
+	mmio_write_16(wdog_base + 0x2, 0x5555);
+	mmio_write_16(wdog_base + 0x2, 0xaaaa);
+	while (1)
+		;
+}
+
+void __dead2 imx_system_off(void)
+{
+	mmio_write_32(IMX_SNVS_BASE + SNVS_LPCR, 0x61);
+
+	tf_printf("Unable to poweroff system\n");
+
+	while (1)
+		;
+}
+
+void __dead2 imx_pwr_domain_pwr_down_wfi(const psci_power_state_t *target_state)
+{
+	if (is_local_state_off(CLUSTER_PWR_STATE(target_state)))
+		imx_set_rbc_count();
+
+	while (1)
+		wfi();
+}
+
+static const plat_psci_ops_t imx_plat_psci_ops = {
+	.pwr_domain_on = imx_pwr_domain_on,
+	.pwr_domain_on_finish = imx_pwr_domain_on_finish,
+	.pwr_domain_off = imx_pwr_domain_off,
+	.validate_ns_entrypoint = imx_validate_ns_entrypoint,
+	.validate_power_state = imx_validate_power_state,
+	.cpu_standby = imx_cpu_standby,
+	.pwr_domain_suspend = imx_domain_suspend,
+	.pwr_domain_suspend_finish = imx_domain_suspend_finish,
+	.pwr_domain_pwr_down_wfi = imx_pwr_domain_pwr_down_wfi,
+	.get_sys_suspend_power_state = imx_get_sys_suspend_power_state,
+	.system_reset = imx_system_reset,
+	.system_off = imx_system_off,
+};
+
+/* export the platform specific psci ops */
+int plat_setup_psci_ops(uintptr_t sec_entrypoint,
+			const plat_psci_ops_t **psci_ops)
+{
+	imx_mailbox_init(sec_entrypoint);
+	/* sec_entrypoint is used for warm reset */
+	*psci_ops = &imx_plat_psci_ops;
+
+	return 0;
+}