/* * Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of ARM nor the names of its contributors may be used * to endorse or promote products derived from this software without specific * prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include extern void prepare_cpu_pwr_dwn(void); /* state id mask */ #define TEGRA186_STATE_ID_MASK 0xF /* constants to get power state's wake time */ #define TEGRA186_WAKE_TIME_MASK 0xFFFFFF #define TEGRA186_WAKE_TIME_SHIFT 4 /* context size to save during system suspend */ #define TEGRA186_SE_CONTEXT_SIZE 3 static uint32_t se_regs[TEGRA186_SE_CONTEXT_SIZE]; static unsigned int wake_time[PLATFORM_CORE_COUNT]; /* System power down state */ uint32_t tegra186_system_powerdn_state = TEGRA_ARI_MISC_CCPLEX_SHUTDOWN_POWER_OFF; int32_t tegra_soc_validate_power_state(unsigned int power_state, psci_power_state_t *req_state) { int state_id = psci_get_pstate_id(power_state) & TEGRA186_STATE_ID_MASK; int cpu = read_mpidr() & MPIDR_CPU_MASK; int impl = (read_midr() >> MIDR_IMPL_SHIFT) & MIDR_IMPL_MASK; if (impl == DENVER_IMPL) cpu |= 0x4; wake_time[cpu] = (power_state >> TEGRA186_WAKE_TIME_SHIFT) & TEGRA186_WAKE_TIME_MASK; /* Sanity check the requested state id */ switch (state_id) { case PSTATE_ID_CORE_IDLE: case PSTATE_ID_CORE_POWERDN: /* * Core powerdown request only for afflvl 0 */ req_state->pwr_domain_state[MPIDR_AFFLVL0] = state_id; break; default: ERROR("%s: unsupported state id (%d)\n", __func__, state_id); return PSCI_E_INVALID_PARAMS; } return PSCI_E_SUCCESS; } int tegra_soc_pwr_domain_suspend(const psci_power_state_t *target_state) { const plat_local_state_t *pwr_domain_state; unsigned int stateid_afflvl0, stateid_afflvl2; int cpu = read_mpidr() & MPIDR_CPU_MASK; int impl = (read_midr() >> MIDR_IMPL_SHIFT) & MIDR_IMPL_MASK; cpu_context_t *ctx = cm_get_context(NON_SECURE); gp_regs_t *gp_regs = get_gpregs_ctx(ctx); uint32_t val; assert(ctx); assert(gp_regs); if (impl == DENVER_IMPL) cpu |= 0x4; /* get the state ID */ pwr_domain_state = target_state->pwr_domain_state; stateid_afflvl0 = pwr_domain_state[MPIDR_AFFLVL0] & TEGRA186_STATE_ID_MASK; stateid_afflvl2 = pwr_domain_state[PLAT_MAX_PWR_LVL] & TEGRA186_STATE_ID_MASK; if (stateid_afflvl0 == PSTATE_ID_CORE_IDLE) { /* Prepare for cpu idle */ (void)mce_command_handler(MCE_CMD_ENTER_CSTATE, TEGRA_ARI_CORE_C6, wake_time[cpu], 0); } else if (stateid_afflvl0 == PSTATE_ID_CORE_POWERDN) { /* Prepare for cpu powerdn */ (void)mce_command_handler(MCE_CMD_ENTER_CSTATE, TEGRA_ARI_CORE_C7, wake_time[cpu], 0); } else if (stateid_afflvl2 == PSTATE_ID_SOC_POWERDN) { /* loop until SC7 is allowed */ do { val = mce_command_handler(MCE_CMD_IS_SC7_ALLOWED, TEGRA_ARI_CORE_C7, MCE_CORE_SLEEP_TIME_INFINITE, 0); } while (val == 0); /* save SE registers */ se_regs[0] = mmio_read_32(TEGRA_SE0_BASE + SE_MUTEX_WATCHDOG_NS_LIMIT); se_regs[1] = mmio_read_32(TEGRA_RNG1_BASE + RNG_MUTEX_WATCHDOG_NS_LIMIT); se_regs[2] = mmio_read_32(TEGRA_PKA1_BASE + PKA_MUTEX_WATCHDOG_NS_LIMIT); /* save 'Secure Boot' Processor Feature Config Register */ val = mmio_read_32(TEGRA_MISC_BASE + MISCREG_PFCFG); mmio_write_32(TEGRA_SCRATCH_BASE + SECURE_SCRATCH_RSV6, val); /* save SMMU context */ tegra_smmu_save_context(); /* Prepare for system suspend */ write_ctx_reg(gp_regs, CTX_GPREG_X4, 1); write_ctx_reg(gp_regs, CTX_GPREG_X5, 0); write_ctx_reg(gp_regs, CTX_GPREG_X6, 1); (void)mce_command_handler(MCE_CMD_UPDATE_CSTATE_INFO, TEGRA_ARI_CLUSTER_CC7, 0, TEGRA_ARI_SYSTEM_SC7); /* Enter system suspend state */ (void)mce_command_handler(MCE_CMD_ENTER_CSTATE, TEGRA_ARI_CORE_C7, MCE_CORE_SLEEP_TIME_INFINITE, 0); } else { ERROR("%s: Unknown state id\n", __func__); return PSCI_E_NOT_SUPPORTED; } return PSCI_E_SUCCESS; } int tegra_soc_pwr_domain_on(u_register_t mpidr) { int target_cpu = mpidr & MPIDR_CPU_MASK; int target_cluster = (mpidr & MPIDR_CLUSTER_MASK) >> MPIDR_AFFINITY_BITS; if (target_cluster > MPIDR_AFFLVL1) { ERROR("%s: unsupported CPU (0x%lx)\n", __func__, mpidr); return PSCI_E_NOT_PRESENT; } /* construct the target CPU # */ target_cpu |= (target_cluster << 2); mce_command_handler(MCE_CMD_ONLINE_CORE, target_cpu, 0, 0); return PSCI_E_SUCCESS; } int tegra_soc_pwr_domain_on_finish(const psci_power_state_t *target_state) { int state_id = target_state->pwr_domain_state[PLAT_MAX_PWR_LVL]; /* * Check if we are exiting from deep sleep and restore SE * context if we are. */ if (state_id == PSTATE_ID_SOC_POWERDN) { mmio_write_32(TEGRA_SE0_BASE + SE_MUTEX_WATCHDOG_NS_LIMIT, se_regs[0]); mmio_write_32(TEGRA_RNG1_BASE + RNG_MUTEX_WATCHDOG_NS_LIMIT, se_regs[1]); mmio_write_32(TEGRA_PKA1_BASE + PKA_MUTEX_WATCHDOG_NS_LIMIT, se_regs[2]); /* Init SMMU */ tegra_smmu_init(); } return PSCI_E_SUCCESS; } int tegra_soc_pwr_domain_off(const psci_power_state_t *target_state) { cpu_context_t *ctx = cm_get_context(NON_SECURE); gp_regs_t *gp_regs = get_gpregs_ctx(ctx); int impl = (read_midr() >> MIDR_IMPL_SHIFT) & MIDR_IMPL_MASK; assert(ctx); assert(gp_regs); /* Turn off wake_mask */ write_ctx_reg(gp_regs, CTX_GPREG_X4, 0); write_ctx_reg(gp_regs, CTX_GPREG_X5, 0); write_ctx_reg(gp_regs, CTX_GPREG_X6, 1); mce_command_handler(MCE_CMD_UPDATE_CSTATE_INFO, TEGRA_ARI_CLUSTER_CC7, 0, TEGRA_ARI_SYSTEM_SC7); /* Disable Denver's DCO operations */ if (impl == DENVER_IMPL) denver_disable_dco(); /* Turn off CPU */ return mce_command_handler(MCE_CMD_ENTER_CSTATE, TEGRA_ARI_CORE_C7, MCE_CORE_SLEEP_TIME_INFINITE, 0); } __dead2 void tegra_soc_prepare_system_off(void) { cpu_context_t *ctx = cm_get_context(NON_SECURE); gp_regs_t *gp_regs = get_gpregs_ctx(ctx); uint32_t val; if (tegra186_system_powerdn_state == TEGRA_ARI_MISC_CCPLEX_SHUTDOWN_POWER_OFF) { /* power off the entire system */ mce_enter_ccplex_state(tegra186_system_powerdn_state); } else if (tegra186_system_powerdn_state == TEGRA_ARI_SYSTEM_SC8) { /* loop until other CPUs power down */ do { val = mce_command_handler(MCE_CMD_IS_SC7_ALLOWED, TEGRA_ARI_CORE_C7, MCE_CORE_SLEEP_TIME_INFINITE, 0); } while (val == 0); /* Prepare for quasi power down */ write_ctx_reg(gp_regs, CTX_GPREG_X4, 1); write_ctx_reg(gp_regs, CTX_GPREG_X5, 0); write_ctx_reg(gp_regs, CTX_GPREG_X6, 1); (void)mce_command_handler(MCE_CMD_UPDATE_CSTATE_INFO, TEGRA_ARI_CLUSTER_CC7, 0, TEGRA_ARI_SYSTEM_SC8); /* Enter quasi power down state */ (void)mce_command_handler(MCE_CMD_ENTER_CSTATE, TEGRA_ARI_CORE_C7, MCE_CORE_SLEEP_TIME_INFINITE, 0); /* disable GICC */ tegra_gic_cpuif_deactivate(); /* power down core */ prepare_cpu_pwr_dwn(); } else { ERROR("%s: unsupported power down state (%d)\n", __func__, tegra186_system_powerdn_state); } wfi(); /* wait for the system to power down */ for (;;) { ; } } int tegra_soc_prepare_system_reset(void) { mce_enter_ccplex_state(TEGRA_ARI_MISC_CCPLEX_SHUTDOWN_REBOOT); return PSCI_E_SUCCESS; }