Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 1 | /* |
Varun Wadekar | 6077dce | 2016-01-27 11:31:06 -0800 | [diff] [blame] | 2 | * Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved. |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 3 | * |
dp-arm | fa3cf0b | 2017-05-03 09:38:09 +0100 | [diff] [blame] | 4 | * SPDX-License-Identifier: BSD-3-Clause |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 5 | */ |
| 6 | |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 7 | #include <assert.h> |
Antonio Nino Diaz | e0f9063 | 2018-12-14 00:18:21 +0000 | [diff] [blame] | 8 | |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 9 | #include <platform_def.h> |
Antonio Nino Diaz | e0f9063 | 2018-12-14 00:18:21 +0000 | [diff] [blame] | 10 | |
| 11 | #include <arch_helpers.h> |
| 12 | #include <common/debug.h> |
| 13 | #include <drivers/delay_timer.h> |
| 14 | #include <lib/mmio.h> |
| 15 | #include <lib/psci/psci.h> |
| 16 | #include <plat/common/platform.h> |
| 17 | |
| 18 | #include <flowctrl.h> |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 19 | #include <pmc.h> |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 20 | #include <tegra_def.h> |
| 21 | #include <tegra_private.h> |
| 22 | |
Varun Wadekar | 071b787 | 2015-07-08 17:42:02 +0530 | [diff] [blame] | 23 | /* |
| 24 | * Register used to clear CPU reset signals. Each CPU has two reset |
| 25 | * signals: CPU reset (3:0) and Core reset (19:16). |
| 26 | */ |
| 27 | #define CPU_CMPLX_RESET_CLR 0x454 |
| 28 | #define CPU_CORE_RESET_MASK 0x10001 |
| 29 | |
Varun Wadekar | 8b82fae | 2015-11-09 17:39:28 -0800 | [diff] [blame] | 30 | /* Clock and Reset controller registers for system clock's settings */ |
| 31 | #define SCLK_RATE 0x30 |
| 32 | #define SCLK_BURST_POLICY 0x28 |
| 33 | #define SCLK_BURST_POLICY_DEFAULT 0x10000000 |
| 34 | |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 35 | static int cpu_powergate_mask[PLATFORM_MAX_CPUS_PER_CLUSTER]; |
| 36 | |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 37 | int32_t tegra_soc_validate_power_state(unsigned int power_state, |
| 38 | psci_power_state_t *req_state) |
Varun Wadekar | 254441d | 2015-07-23 10:07:54 +0530 | [diff] [blame] | 39 | { |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 40 | int state_id = psci_get_pstate_id(power_state); |
| 41 | |
Varun Wadekar | 254441d | 2015-07-23 10:07:54 +0530 | [diff] [blame] | 42 | /* Sanity check the requested state id */ |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 43 | switch (state_id) { |
Varun Wadekar | 254441d | 2015-07-23 10:07:54 +0530 | [diff] [blame] | 44 | case PSTATE_ID_CORE_POWERDN: |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 45 | /* |
| 46 | * Core powerdown request only for afflvl 0 |
| 47 | */ |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 48 | req_state->pwr_domain_state[MPIDR_AFFLVL0] = state_id & 0xff; |
| 49 | |
| 50 | break; |
| 51 | |
Varun Wadekar | 254441d | 2015-07-23 10:07:54 +0530 | [diff] [blame] | 52 | case PSTATE_ID_CLUSTER_IDLE: |
| 53 | case PSTATE_ID_CLUSTER_POWERDN: |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 54 | /* |
| 55 | * Cluster powerdown/idle request only for afflvl 1 |
| 56 | */ |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 57 | req_state->pwr_domain_state[MPIDR_AFFLVL1] = state_id; |
Varun Wadekar | dba8007 | 2016-09-01 14:56:17 -0700 | [diff] [blame] | 58 | req_state->pwr_domain_state[MPIDR_AFFLVL0] = state_id; |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 59 | |
| 60 | break; |
| 61 | |
Varun Wadekar | 254441d | 2015-07-23 10:07:54 +0530 | [diff] [blame] | 62 | case PSTATE_ID_SOC_POWERDN: |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 63 | /* |
| 64 | * System powerdown request only for afflvl 2 |
| 65 | */ |
Varun Wadekar | 66231d1 | 2017-06-07 09:57:42 -0700 | [diff] [blame] | 66 | for (uint32_t i = MPIDR_AFFLVL0; i < PLAT_MAX_PWR_LVL; i++) |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 67 | req_state->pwr_domain_state[i] = PLAT_MAX_OFF_STATE; |
| 68 | |
| 69 | req_state->pwr_domain_state[PLAT_MAX_PWR_LVL] = |
| 70 | PLAT_SYS_SUSPEND_STATE_ID; |
| 71 | |
Varun Wadekar | 254441d | 2015-07-23 10:07:54 +0530 | [diff] [blame] | 72 | break; |
| 73 | |
| 74 | default: |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 75 | ERROR("%s: unsupported state id (%d)\n", __func__, state_id); |
| 76 | return PSCI_E_INVALID_PARAMS; |
Varun Wadekar | 254441d | 2015-07-23 10:07:54 +0530 | [diff] [blame] | 77 | } |
| 78 | |
| 79 | return PSCI_E_SUCCESS; |
| 80 | } |
| 81 | |
Varun Wadekar | b91b5fc | 2017-04-18 11:22:01 -0700 | [diff] [blame] | 82 | /******************************************************************************* |
| 83 | * Platform handler to calculate the proper target power level at the |
| 84 | * specified affinity level |
| 85 | ******************************************************************************/ |
| 86 | plat_local_state_t tegra_soc_get_target_pwr_state(unsigned int lvl, |
| 87 | const plat_local_state_t *states, |
| 88 | unsigned int ncpu) |
| 89 | { |
| 90 | plat_local_state_t target = *states; |
| 91 | int cpu = plat_my_core_pos(); |
| 92 | int core_pos = read_mpidr() & MPIDR_CPU_MASK; |
| 93 | |
| 94 | /* get the power state at this level */ |
| 95 | if (lvl == MPIDR_AFFLVL1) |
| 96 | target = *(states + core_pos); |
| 97 | if (lvl == MPIDR_AFFLVL2) |
| 98 | target = *(states + cpu); |
| 99 | |
| 100 | /* Cluster idle/power-down */ |
| 101 | if ((lvl == MPIDR_AFFLVL1) && ((target == PSTATE_ID_CLUSTER_IDLE) || |
| 102 | (target == PSTATE_ID_CLUSTER_POWERDN))) { |
| 103 | return target; |
| 104 | } |
| 105 | |
| 106 | /* System Suspend */ |
| 107 | if (((lvl == MPIDR_AFFLVL2) || (lvl == MPIDR_AFFLVL1)) && |
| 108 | (target == PSTATE_ID_SOC_POWERDN)) |
| 109 | return PSTATE_ID_SOC_POWERDN; |
| 110 | |
| 111 | /* default state */ |
| 112 | return PSCI_LOCAL_STATE_RUN; |
| 113 | } |
| 114 | |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 115 | int tegra_soc_pwr_domain_suspend(const psci_power_state_t *target_state) |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 116 | { |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 117 | u_register_t mpidr = read_mpidr(); |
| 118 | const plat_local_state_t *pwr_domain_state = |
| 119 | target_state->pwr_domain_state; |
| 120 | unsigned int stateid_afflvl2 = pwr_domain_state[MPIDR_AFFLVL2]; |
| 121 | unsigned int stateid_afflvl1 = pwr_domain_state[MPIDR_AFFLVL1]; |
| 122 | unsigned int stateid_afflvl0 = pwr_domain_state[MPIDR_AFFLVL0]; |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 123 | |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 124 | if (stateid_afflvl2 == PSTATE_ID_SOC_POWERDN) { |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 125 | |
Harvey Hsieh | 20e9fef | 2016-12-28 21:53:18 +0800 | [diff] [blame] | 126 | assert((stateid_afflvl0 == PLAT_MAX_OFF_STATE) || |
| 127 | (stateid_afflvl0 == PSTATE_ID_SOC_POWERDN)); |
| 128 | assert((stateid_afflvl1 == PLAT_MAX_OFF_STATE) || |
| 129 | (stateid_afflvl1 == PSTATE_ID_SOC_POWERDN)); |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 130 | |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 131 | /* suspend the entire soc */ |
| 132 | tegra_fc_soc_powerdn(mpidr); |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 133 | |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 134 | } else if (stateid_afflvl1 == PSTATE_ID_CLUSTER_IDLE) { |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 135 | |
Varun Wadekar | b91b5fc | 2017-04-18 11:22:01 -0700 | [diff] [blame] | 136 | assert(stateid_afflvl0 == PSTATE_ID_CLUSTER_IDLE); |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 137 | |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 138 | /* Prepare for cluster idle */ |
| 139 | tegra_fc_cluster_idle(mpidr); |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 140 | |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 141 | } else if (stateid_afflvl1 == PSTATE_ID_CLUSTER_POWERDN) { |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 142 | |
Varun Wadekar | b91b5fc | 2017-04-18 11:22:01 -0700 | [diff] [blame] | 143 | assert(stateid_afflvl0 == PSTATE_ID_CLUSTER_POWERDN); |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 144 | |
| 145 | /* Prepare for cluster powerdn */ |
| 146 | tegra_fc_cluster_powerdn(mpidr); |
| 147 | |
| 148 | } else if (stateid_afflvl0 == PSTATE_ID_CORE_POWERDN) { |
| 149 | |
| 150 | /* Prepare for cpu powerdn */ |
| 151 | tegra_fc_cpu_powerdn(mpidr); |
| 152 | |
| 153 | } else { |
| 154 | ERROR("%s: Unknown state id\n", __func__); |
| 155 | return PSCI_E_NOT_SUPPORTED; |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 156 | } |
| 157 | |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 158 | return PSCI_E_SUCCESS; |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 159 | } |
| 160 | |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 161 | int tegra_soc_pwr_domain_on_finish(const psci_power_state_t *target_state) |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 162 | { |
Varun Wadekar | bc78744 | 2015-07-27 13:00:50 +0530 | [diff] [blame] | 163 | uint32_t val; |
| 164 | |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 165 | /* |
| 166 | * Check if we are exiting from SOC_POWERDN. |
| 167 | */ |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 168 | if (target_state->pwr_domain_state[PLAT_MAX_PWR_LVL] == |
| 169 | PLAT_SYS_SUSPEND_STATE_ID) { |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 170 | |
| 171 | /* |
Varun Wadekar | 6eec6d6 | 2016-03-03 13:28:10 -0800 | [diff] [blame] | 172 | * Lock scratch registers which hold the CPU vectors |
| 173 | */ |
| 174 | tegra_pmc_lock_cpu_vectors(); |
| 175 | |
| 176 | /* |
Varun Wadekar | bc78744 | 2015-07-27 13:00:50 +0530 | [diff] [blame] | 177 | * Enable WRAP to INCR burst type conversions for |
| 178 | * incoming requests on the AXI slave ports. |
| 179 | */ |
| 180 | val = mmio_read_32(TEGRA_MSELECT_BASE + MSELECT_CONFIG); |
| 181 | val &= ~ENABLE_UNSUP_TX_ERRORS; |
| 182 | val |= ENABLE_WRAP_TO_INCR_BURSTS; |
| 183 | mmio_write_32(TEGRA_MSELECT_BASE + MSELECT_CONFIG, val); |
| 184 | |
| 185 | /* |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 186 | * Restore Boot and Power Management Processor (BPMP) reset |
| 187 | * address and reset it. |
| 188 | */ |
| 189 | tegra_fc_reset_bpmp(); |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | /* |
| 193 | * T210 has a dedicated ARMv7 boot and power mgmt processor, BPMP. It's |
| 194 | * used for power management and boot purposes. Inform the BPMP that |
| 195 | * we have completed the cluster power up. |
| 196 | */ |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 197 | tegra_fc_lock_active_cluster(); |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 198 | |
| 199 | return PSCI_E_SUCCESS; |
| 200 | } |
| 201 | |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 202 | int tegra_soc_pwr_domain_on(u_register_t mpidr) |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 203 | { |
| 204 | int cpu = mpidr & MPIDR_CPU_MASK; |
Varun Wadekar | 071b787 | 2015-07-08 17:42:02 +0530 | [diff] [blame] | 205 | uint32_t mask = CPU_CORE_RESET_MASK << cpu; |
| 206 | |
| 207 | /* Deassert CPU reset signals */ |
| 208 | mmio_write_32(TEGRA_CAR_RESET_BASE + CPU_CMPLX_RESET_CLR, mask); |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 209 | |
| 210 | /* Turn on CPU using flow controller or PMC */ |
| 211 | if (cpu_powergate_mask[cpu] == 0) { |
| 212 | tegra_pmc_cpu_on(cpu); |
| 213 | cpu_powergate_mask[cpu] = 1; |
| 214 | } else { |
| 215 | tegra_fc_cpu_on(cpu); |
| 216 | } |
| 217 | |
| 218 | return PSCI_E_SUCCESS; |
| 219 | } |
| 220 | |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 221 | int tegra_soc_pwr_domain_off(const psci_power_state_t *target_state) |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 222 | { |
Varun Wadekar | a78bb1b | 2015-08-07 10:03:00 +0530 | [diff] [blame] | 223 | tegra_fc_cpu_off(read_mpidr() & MPIDR_CPU_MASK); |
Varun Wadekar | b316e24 | 2015-05-19 16:48:04 +0530 | [diff] [blame] | 224 | return PSCI_E_SUCCESS; |
| 225 | } |
Varun Wadekar | 8b82fae | 2015-11-09 17:39:28 -0800 | [diff] [blame] | 226 | |
| 227 | int tegra_soc_prepare_system_reset(void) |
| 228 | { |
| 229 | /* |
| 230 | * Set System Clock (SCLK) to POR default so that the clock source |
| 231 | * for the PMC APB clock would not be changed due to system reset. |
| 232 | */ |
| 233 | mmio_write_32((uintptr_t)TEGRA_CAR_RESET_BASE + SCLK_BURST_POLICY, |
| 234 | SCLK_BURST_POLICY_DEFAULT); |
| 235 | mmio_write_32((uintptr_t)TEGRA_CAR_RESET_BASE + SCLK_RATE, 0); |
| 236 | |
| 237 | /* Wait 1 ms to make sure clock source/device logic is stabilized. */ |
| 238 | mdelay(1); |
| 239 | |
| 240 | return PSCI_E_SUCCESS; |
| 241 | } |