Adding upstream version 2.8.0+dfsg.upstream/2.8.0+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 589 insertions, 0 deletions

diff --git a/plat/mediatek/mt8183/plat_pm.c b/plat/mediatek/mt8183/plat_pm.c
new file mode 100644
index 0000000..6094a17
--- /dev/null
+++ b/plat/mediatek/mt8183/plat_pm.c
@@ -0,0 +1,589 @@
+/*
+ * Copyright (c) 2019-2020, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/* common headers */
+#include <arch_helpers.h>
+#include <assert.h>
+#include <common/debug.h>
+#include <lib/mmio.h>
+#include <lib/psci/psci.h>
+#include <errno.h>
+
+/* mediatek platform specific headers */
+#include <platform_def.h>
+#include <scu.h>
+#include <mt_gic_v3.h>
+#include <mtk_mcdi.h>
+#include <mtk_plat_common.h>
+#include <mtgpio.h>
+#include <mtspmc.h>
+#include <plat_dcm.h>
+#include <plat_debug.h>
+#include <plat_params.h>
+#include <plat_private.h>
+#include <power_tracer.h>
+#include <pmic.h>
+#include <spm.h>
+#include <spm_suspend.h>
+#include <sspm.h>
+#include <rtc.h>
+
+/* Local power state for power domains in Run state. */
+#define MTK_LOCAL_STATE_RUN	0
+/* Local power state for retention. */
+#define MTK_LOCAL_STATE_RET	1
+/* Local power state for OFF/power-down. */
+#define MTK_LOCAL_STATE_OFF	2
+
+#if PSCI_EXTENDED_STATE_ID
+/*
+ * Macros used to parse state information from State-ID if it is using the
+ * recommended encoding for State-ID.
+ */
+#define MTK_LOCAL_PSTATE_WIDTH		4
+#define MTK_LOCAL_PSTATE_MASK		((1 << MTK_LOCAL_PSTATE_WIDTH) - 1)
+
+/* Macros to construct the composite power state */
+
+/* Make composite power state parameter till power level 0 */
+
+#define mtk_make_pwrstate_lvl0(lvl0_state, pwr_lvl, type) \
+	(((lvl0_state) << PSTATE_ID_SHIFT) | ((type) << PSTATE_TYPE_SHIFT))
+
+#else /* !PSCI_EXTENDED_STATE_ID */
+
+#define mtk_make_pwrstate_lvl0(lvl0_state, pwr_lvl, type) \
+		(((lvl0_state) << PSTATE_ID_SHIFT) | \
+		((pwr_lvl) << PSTATE_PWR_LVL_SHIFT) | \
+		((type) << PSTATE_TYPE_SHIFT))
+
+#endif /* PSCI_EXTENDED_STATE_ID */
+
+/* Make composite power state parameter till power level 1 */
+#define mtk_make_pwrstate_lvl1(lvl1_state, lvl0_state, pwr_lvl, type) \
+		(((lvl1_state) << MTK_LOCAL_PSTATE_WIDTH) | \
+		mtk_make_pwrstate_lvl0(lvl0_state, pwr_lvl, type))
+
+/* Make composite power state parameter till power level 2 */
+#define mtk_make_pwrstate_lvl2( \
+		lvl2_state, lvl1_state, lvl0_state, pwr_lvl, type) \
+		(((lvl2_state) << (MTK_LOCAL_PSTATE_WIDTH * 2)) | \
+		mtk_make_pwrstate_lvl1(lvl1_state, lvl0_state, pwr_lvl, type))
+
+#define MTK_PWR_LVL0	0
+#define MTK_PWR_LVL1	1
+#define MTK_PWR_LVL2	2
+
+/* Macros to read the MTK power domain state */
+#define MTK_CORE_PWR_STATE(state)	(state)->pwr_domain_state[MTK_PWR_LVL0]
+#define MTK_CLUSTER_PWR_STATE(state)	(state)->pwr_domain_state[MTK_PWR_LVL1]
+#define MTK_SYSTEM_PWR_STATE(state)	((PLAT_MAX_PWR_LVL > MTK_PWR_LVL1) ? \
+			(state)->pwr_domain_state[MTK_PWR_LVL2] : 0)
+
+#if PSCI_EXTENDED_STATE_ID
+/*
+ *  The table storing the valid idle power states. Ensure that the
+ *  array entries are populated in ascending order of state-id to
+ *  enable us to use binary search during power state validation.
+ *  The table must be terminated by a NULL entry.
+ */
+const unsigned int mtk_pm_idle_states[] = {
+	/* State-id - 0x001 */
+	mtk_make_pwrstate_lvl2(MTK_LOCAL_STATE_RUN, MTK_LOCAL_STATE_RUN,
+		MTK_LOCAL_STATE_RET, MTK_PWR_LVL0, PSTATE_TYPE_STANDBY),
+	/* State-id - 0x002 */
+	mtk_make_pwrstate_lvl2(MTK_LOCAL_STATE_RUN, MTK_LOCAL_STATE_RUN,
+		MTK_LOCAL_STATE_OFF, MTK_PWR_LVL0, PSTATE_TYPE_POWERDOWN),
+	/* State-id - 0x022 */
+	mtk_make_pwrstate_lvl2(MTK_LOCAL_STATE_RUN, MTK_LOCAL_STATE_OFF,
+		MTK_LOCAL_STATE_OFF, MTK_PWR_LVL1, PSTATE_TYPE_POWERDOWN),
+#if PLAT_MAX_PWR_LVL > MTK_PWR_LVL1
+	/* State-id - 0x222 */
+	mtk_make_pwrstate_lvl2(MTK_LOCAL_STATE_OFF, MTK_LOCAL_STATE_OFF,
+		MTK_LOCAL_STATE_OFF, MTK_PWR_LVL2, PSTATE_TYPE_POWERDOWN),
+#endif
+	0,
+};
+#endif
+
+#define CPU_IDX(cluster, cpu)		((cluster << 2) + cpu)
+#define ON	true
+#define OFF	false
+
+/* Pause MCDI when CPU hotplug */
+static bool HP_SSPM_PAUSE;
+/* CPU Hotplug by SSPM */
+static bool HP_SSPM_CTRL = true;
+/* Turn off cluster when CPU hotplug off */
+static bool HP_CLUSTER_OFF = true;
+/* Turn off cluster when CPU MCDI off */
+static bool MCDI_C2 = true;
+/* Enable MCDI */
+static bool MCDI_SSPM = true;
+
+static uintptr_t secure_entrypoint;
+
+static void mp1_L2_desel_config(void)
+{
+	mmio_write_64(MCUCFG_BASE + 0x2200, 0x2092c820);
+
+	dsb();
+}
+
+static bool clst_single_pwr(int cluster, int cpu)
+{
+	uint32_t cpu_mask[2] = {0x00001e00, 0x000f0000};
+	uint32_t cpu_pwr_bit[] = {9, 10, 11, 12, 16, 17, 18, 19};
+	int my_idx = (cluster << 2) + cpu;
+	uint32_t pwr_stat = mmio_read_32(0x10006180);
+
+	return !(pwr_stat & (cpu_mask[cluster] & ~BIT(cpu_pwr_bit[my_idx])));
+}
+
+static bool clst_single_on(int cluster, int cpu)
+{
+	uint32_t cpu_mask[2] = {0x0f, 0xf0};
+	int my_idx = (cluster << 2) + cpu;
+	uint32_t on_stat = mcdi_avail_cpu_mask_read();
+
+	return !(on_stat & (cpu_mask[cluster] & ~BIT(my_idx)));
+}
+
+static void plat_cpu_pwrdwn_common(void)
+{
+	/* Prevent interrupts from spuriously waking up this cpu */
+	mt_gic_rdistif_save();
+	mt_gic_cpuif_disable();
+}
+
+static void plat_cpu_pwron_common(void)
+{
+	/* Enable the gic cpu interface */
+	mt_gic_cpuif_enable();
+	mt_gic_rdistif_init();
+	mt_gic_rdistif_restore();
+}
+
+static void plat_cluster_pwrdwn_common(uint64_t mpidr, int cluster)
+{
+	if (cluster > 0)
+		mt_gic_sync_dcm_enable();
+
+	/* Disable coherency */
+	plat_mtk_cci_disable();
+	disable_scu(mpidr);
+}
+
+static void plat_cluster_pwron_common(uint64_t mpidr, int cluster)
+{
+	if (cluster > 0) {
+		l2c_parity_check_setup();
+		circular_buffer_setup();
+		mp1_L2_desel_config();
+		mt_gic_sync_dcm_disable();
+	}
+
+	/* Enable coherency */
+	enable_scu(mpidr);
+	plat_mtk_cci_enable();
+	/* Enable big core dcm */
+	plat_dcm_restore_cluster_on(mpidr);
+	/* Enable rgu dcm */
+	plat_dcm_rgu_enable();
+}
+
+static void plat_cpu_standby(plat_local_state_t cpu_state)
+{
+	u_register_t scr;
+
+	scr = read_scr_el3();
+	write_scr_el3(scr | SCR_IRQ_BIT | SCR_FIQ_BIT);
+
+	isb();
+	dsb();
+	wfi();
+
+	write_scr_el3(scr);
+}
+
+static void mcdi_ctrl_before_hotplug_on(int cluster, int cpu)
+{
+	if (!HP_SSPM_CTRL && HP_SSPM_PAUSE && MCDI_SSPM) {
+		mcdi_pause_clr(cluster, CPU_IDX(cluster, cpu), OFF);
+		mcdi_pause_set(cluster, CPU_IDX(cluster, cpu), ON);
+	}
+}
+
+static void mcdi_ctrl_before_hotplug_off(int cluster, int cpu, bool cluster_off)
+{
+	if (!HP_SSPM_CTRL && HP_SSPM_PAUSE && MCDI_SSPM)
+		mcdi_pause_set(cluster_off ? cluster : -1,
+				CPU_IDX(cluster, cpu), OFF);
+}
+
+static void mcdi_ctrl_cluster_cpu_off(int cluster, int cpu, bool cluster_off)
+{
+	if (MCDI_SSPM) {
+		sspm_set_bootaddr(secure_entrypoint);
+
+		sspm_standbywfi_irq_enable(CPU_IDX(cluster, cpu));
+
+		if (cluster_off)
+			sspm_cluster_pwr_off_notify(cluster);
+		else
+			sspm_cluster_pwr_on_notify(cluster);
+	}
+}
+
+static void mcdi_ctrl_suspend(void)
+{
+	if (MCDI_SSPM)
+		mcdi_pause();
+}
+
+static void mcdi_ctrl_resume(void)
+{
+	if (MCDI_SSPM)
+		mcdi_unpause();
+}
+
+static void hotplug_ctrl_cluster_on(int cluster, int cpu)
+{
+	if (HP_SSPM_CTRL && MCDI_SSPM) {
+		mcdi_hotplug_clr(cluster, CPU_IDX(cluster, cpu), OFF);
+		mcdi_hotplug_set(cluster, -1, ON);
+		mcdi_hotplug_wait_ack(cluster, -1, ON);
+	} else {
+		/* power on cluster */
+		if (!spm_get_cluster_powerstate(cluster))
+			spm_poweron_cluster(cluster);
+	}
+}
+
+static void hotplug_ctrl_cpu_on(int cluster, int cpu)
+{
+	if (HP_SSPM_CTRL && MCDI_SSPM)
+		mcdi_hotplug_set(cluster, CPU_IDX(cluster, cpu), ON);
+	else
+		spm_poweron_cpu(cluster, cpu);
+}
+
+static void hotplug_ctrl_cpu_on_finish(int cluster, int cpu)
+{
+	spm_disable_cpu_auto_off(cluster, cpu);
+
+	if (HP_SSPM_CTRL && MCDI_SSPM)
+		mcdi_hotplug_clr(cluster, CPU_IDX(cluster, cpu), ON);
+	else if (HP_SSPM_PAUSE && MCDI_SSPM)
+		mcdi_pause_clr(cluster, CPU_IDX(cluster, cpu), ON);
+
+	mcdi_avail_cpu_mask_set(BIT(CPU_IDX(cluster, cpu)));
+}
+
+static void hotplug_ctrl_cluster_cpu_off(int cluster, int cpu, bool cluster_off)
+{
+	mcdi_avail_cpu_mask_clr(BIT(CPU_IDX(cluster, cpu)));
+
+	if (HP_SSPM_CTRL && MCDI_SSPM) {
+		mcdi_hotplug_set(cluster_off ? cluster : -1,
+				CPU_IDX(cluster, cpu), OFF);
+	} else {
+		spm_enable_cpu_auto_off(cluster, cpu);
+
+		if (cluster_off)
+			spm_enable_cluster_auto_off(cluster);
+
+		spm_set_cpu_power_off(cluster, cpu);
+	}
+}
+
+static int plat_mtk_power_domain_on(unsigned long mpidr)
+{
+	int cpu = MPIDR_AFFLVL0_VAL(mpidr);
+	int cluster = MPIDR_AFFLVL1_VAL(mpidr);
+	int clst_pwr = spm_get_cluster_powerstate(cluster);
+	unsigned int i;
+
+	mcdi_ctrl_before_hotplug_on(cluster, cpu);
+	hotplug_ctrl_cluster_on(cluster, cpu);
+
+	if (clst_pwr == 0) {
+		/* init cpu reset arch as AARCH64 of cluster */
+		for (i = 0; i < PLATFORM_MAX_CPUS_PER_CLUSTER; i++) {
+			mcucfg_init_archstate(cluster, i, 1);
+			mcucfg_set_bootaddr(cluster, i, secure_entrypoint);
+		}
+	}
+
+	hotplug_ctrl_cpu_on(cluster, cpu);
+
+	return PSCI_E_SUCCESS;
+}
+
+static void plat_mtk_power_domain_off(const psci_power_state_t *state)
+{
+	uint64_t mpidr = read_mpidr();
+	int cpu = MPIDR_AFFLVL0_VAL(mpidr);
+	int cluster = MPIDR_AFFLVL1_VAL(mpidr);
+	const plat_local_state_t *pds = state->pwr_domain_state;
+	bool afflvl1 = (pds[MPIDR_AFFLVL1] == MTK_LOCAL_STATE_OFF);
+	bool cluster_off = (HP_CLUSTER_OFF && afflvl1 &&
+					clst_single_on(cluster, cpu));
+
+	plat_cpu_pwrdwn_common();
+
+	if (cluster_off)
+		plat_cluster_pwrdwn_common(mpidr, cluster);
+
+	mcdi_ctrl_before_hotplug_off(cluster, cpu, cluster_off);
+	hotplug_ctrl_cluster_cpu_off(cluster, cpu, cluster_off);
+}
+
+static void plat_mtk_power_domain_on_finish(const psci_power_state_t *state)
+{
+	uint64_t mpidr = read_mpidr();
+	int cpu = MPIDR_AFFLVL0_VAL(mpidr);
+	int cluster = MPIDR_AFFLVL1_VAL(mpidr);
+	const plat_local_state_t *pds = state->pwr_domain_state;
+	bool afflvl1 = (pds[MPIDR_AFFLVL1] == MTK_LOCAL_STATE_OFF);
+
+	if (afflvl1)
+		plat_cluster_pwron_common(mpidr, cluster);
+
+	plat_cpu_pwron_common();
+
+	hotplug_ctrl_cpu_on_finish(cluster, cpu);
+}
+
+static void plat_mtk_power_domain_suspend(const psci_power_state_t *state)
+{
+	uint64_t mpidr = read_mpidr();
+	int cpu = MPIDR_AFFLVL0_VAL(mpidr);
+	int cluster = MPIDR_AFFLVL1_VAL(mpidr);
+	const plat_local_state_t *pds = state->pwr_domain_state;
+	bool afflvl1 = (pds[MPIDR_AFFLVL1] == MTK_LOCAL_STATE_OFF);
+	bool afflvl2 = (pds[MPIDR_AFFLVL2] == MTK_LOCAL_STATE_OFF);
+	bool cluster_off = MCDI_C2 && afflvl1 && clst_single_pwr(cluster, cpu);
+
+	plat_cpu_pwrdwn_common();
+
+	plat_dcm_mcsi_a_backup();
+
+	if (cluster_off || afflvl2)
+		plat_cluster_pwrdwn_common(mpidr, cluster);
+
+	if (afflvl2) {
+		spm_data_t spm_d = { .cmd = SPM_SUSPEND };
+		uint32_t *d = (uint32_t *)&spm_d;
+		uint32_t l = sizeof(spm_d) / sizeof(uint32_t);
+
+		mcdi_ctrl_suspend();
+
+		spm_set_bootaddr(secure_entrypoint);
+
+		if (MCDI_SSPM)
+			sspm_ipi_send_non_blocking(IPI_ID_SUSPEND, d);
+
+		spm_system_suspend();
+
+		if (MCDI_SSPM)
+			while (sspm_ipi_recv_non_blocking(IPI_ID_SUSPEND, d, l))
+				;
+
+		mt_gic_distif_save();
+	} else {
+		mcdi_ctrl_cluster_cpu_off(cluster, cpu, cluster_off);
+	}
+}
+
+static void plat_mtk_power_domain_suspend_finish(const psci_power_state_t *state)
+{
+	uint64_t mpidr = read_mpidr();
+	int cluster = MPIDR_AFFLVL1_VAL(mpidr);
+	const plat_local_state_t *pds = state->pwr_domain_state;
+	bool afflvl2 = (pds[MPIDR_AFFLVL2] == MTK_LOCAL_STATE_OFF);
+
+	if (afflvl2) {
+		spm_data_t spm_d = { .cmd = SPM_RESUME };
+		uint32_t *d = (uint32_t *)&spm_d;
+		uint32_t l = sizeof(spm_d) / sizeof(uint32_t);
+
+		mt_gic_init();
+		mt_gic_distif_restore();
+		mt_gic_rdistif_restore();
+
+		mmio_write_32(EMI_WFIFO, 0xf);
+
+		if (MCDI_SSPM)
+			sspm_ipi_send_non_blocking(IPI_ID_SUSPEND, d);
+
+		spm_system_suspend_finish();
+
+		if (MCDI_SSPM)
+			while (sspm_ipi_recv_non_blocking(IPI_ID_SUSPEND, d, l))
+				;
+
+		mcdi_ctrl_resume();
+	} else {
+		plat_cpu_pwron_common();
+	}
+
+	plat_cluster_pwron_common(mpidr, cluster);
+
+	plat_dcm_mcsi_a_restore();
+}
+
+#if PSCI_EXTENDED_STATE_ID
+
+static int plat_mtk_validate_power_state(unsigned int power_state,
+				psci_power_state_t *req_state)
+{
+	unsigned int state_id;
+	int i;
+
+	assert(req_state);
+
+	if (!MCDI_SSPM)
+		return PSCI_E_INVALID_PARAMS;
+
+	/*
+	 *  Currently we are using a linear search for finding the matching
+	 *  entry in the idle power state array. This can be made a binary
+	 *  search if the number of entries justify the additional complexity.
+	 */
+	for (i = 0; !!mtk_pm_idle_states[i]; i++) {
+		if (power_state == mtk_pm_idle_states[i])
+			break;
+	}
+
+	/* Return error if entry not found in the idle state array */
+	if (!mtk_pm_idle_states[i])
+		return PSCI_E_INVALID_PARAMS;
+
+	i = 0;
+	state_id = psci_get_pstate_id(power_state);
+
+	/* Parse the State ID and populate the state info parameter */
+	while (state_id) {
+		req_state->pwr_domain_state[i++] = state_id &
+						MTK_LOCAL_PSTATE_MASK;
+		state_id >>= MTK_LOCAL_PSTATE_WIDTH;
+	}
+
+	return PSCI_E_SUCCESS;
+}
+
+#else /* if !PSCI_EXTENDED_STATE_ID */
+
+static int plat_mtk_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 != 0)
+			return PSCI_E_INVALID_PARAMS;
+
+		req_state->pwr_domain_state[MTK_PWR_LVL0] = MTK_LOCAL_STATE_RET;
+	} else if (!MCDI_SSPM) {
+		return PSCI_E_INVALID_PARAMS;
+	} else {
+		for (i = 0; i <= pwr_lvl; i++)
+			req_state->pwr_domain_state[i] = MTK_LOCAL_STATE_OFF;
+	}
+
+	return PSCI_E_SUCCESS;
+}
+
+#endif /* PSCI_EXTENDED_STATE_ID */
+
+/*******************************************************************************
+ * MTK handlers to shutdown/reboot the system
+ ******************************************************************************/
+static void __dead2 plat_mtk_system_off(void)
+{
+	INFO("MTK System Off\n");
+
+	rtc_power_off_sequence();
+	wk_pmic_enable_sdn_delay();
+	pmic_power_off();
+
+	wfi();
+	ERROR("MTK System Off: operation not handled.\n");
+	panic();
+}
+
+static void __dead2 plat_mtk_system_reset(void)
+{
+	struct bl_aux_gpio_info *gpio_reset = plat_get_mtk_gpio_reset();
+
+	INFO("MTK System Reset\n");
+
+	mt_set_gpio_out(gpio_reset->index, gpio_reset->polarity);
+
+	wfi();
+	ERROR("MTK System Reset: operation not handled.\n");
+	panic();
+}
+
+static void plat_mtk_get_sys_suspend_power_state(psci_power_state_t *req_state)
+{
+	assert(PLAT_MAX_PWR_LVL >= 2);
+
+	for (int i = MPIDR_AFFLVL0; i <= PLAT_MAX_PWR_LVL; i++)
+		req_state->pwr_domain_state[i] = MTK_LOCAL_STATE_OFF;
+}
+
+/*******************************************************************************
+ * MTK_platform handler called when an affinity instance is about to be turned
+ * on. The level and mpidr determine the affinity instance.
+ ******************************************************************************/
+static const plat_psci_ops_t plat_plat_pm_ops = {
+	.cpu_standby			= plat_cpu_standby,
+	.pwr_domain_on			= plat_mtk_power_domain_on,
+	.pwr_domain_on_finish		= plat_mtk_power_domain_on_finish,
+	.pwr_domain_off			= plat_mtk_power_domain_off,
+	.pwr_domain_suspend		= plat_mtk_power_domain_suspend,
+	.pwr_domain_suspend_finish	= plat_mtk_power_domain_suspend_finish,
+	.system_off			= plat_mtk_system_off,
+	.system_reset			= plat_mtk_system_reset,
+	.validate_power_state		= plat_mtk_validate_power_state,
+	.get_sys_suspend_power_state	= plat_mtk_get_sys_suspend_power_state
+};
+
+int plat_setup_psci_ops(uintptr_t sec_entrypoint,
+			const plat_psci_ops_t **psci_ops)
+{
+	unsigned int i;
+
+	*psci_ops = &plat_plat_pm_ops;
+	secure_entrypoint = sec_entrypoint;
+
+	/* Init cpu reset arch as AARCH64 of cluster 0 */
+	for (i = 0; i < PLATFORM_MAX_CPUS_PER_CLUSTER; i++) {
+		mcucfg_init_archstate(0, i, 1);
+		mcucfg_set_bootaddr(0, i, secure_entrypoint);
+	}
+
+	if (!check_mcdi_ctl_stat()) {
+		HP_SSPM_CTRL = false;
+		MCDI_SSPM = false;
+	}
+
+	return 0;
+}