1 /* 2 * Copyright (c) 2019-2022, Xilinx, Inc. All rights reserved. 3 * Copyright (c) 2022-2023, Advanced Micro Devices, Inc. All rights reserved. 4 * 5 * SPDX-License-Identifier: BSD-3-Clause 6 */ 7 8 /* 9 * APU specific definition of processors in the subsystem as well as functions 10 * for getting information about and changing state of the APU. 11 */ 12 13 #include <assert.h> 14 #include <plat_ipi.h> 15 #include <platform_def.h> 16 #include <versal_def.h> 17 #include <lib/bakery_lock.h> 18 #include <lib/mmio.h> 19 #include <lib/utils.h> 20 #include <drivers/arm/gicv3.h> 21 #include <drivers/arm/gic_common.h> 22 #include <plat/common/platform.h> 23 #include "pm_api_sys.h" 24 #include "pm_client.h" 25 #include "pm_defs.h" 26 27 #define UNDEFINED_CPUID (~0) 28 29 DEFINE_BAKERY_LOCK(pm_client_secure_lock); 30 31 static const struct pm_ipi apu_ipi = { 32 .local_ipi_id = IPI_ID_APU, 33 .remote_ipi_id = IPI_ID_PMC, 34 .buffer_base = IPI_BUFFER_APU_BASE, 35 }; 36 37 /* Order in pm_procs_all array must match cpu ids */ 38 static const struct pm_proc pm_procs_all[] = { 39 { 40 .node_id = XPM_DEVID_ACPU_0, 41 .ipi = &apu_ipi, 42 .pwrdn_mask = APU_0_PWRCTL_CPUPWRDWNREQ_MASK, 43 }, 44 { 45 .node_id = XPM_DEVID_ACPU_1, 46 .ipi = &apu_ipi, 47 .pwrdn_mask = APU_1_PWRCTL_CPUPWRDWNREQ_MASK, 48 } 49 }; 50 51 const struct pm_proc *primary_proc = &pm_procs_all[0]; 52 53 /** 54 * irq_to_pm_node_idx - Get PM node index corresponding to the interrupt number 55 * @irq: Interrupt number 56 * 57 * Return: PM node index corresponding to the specified interrupt 58 */ 59 enum pm_device_node_idx irq_to_pm_node_idx(uint32_t irq) 60 { 61 enum pm_device_node_idx dev_idx = XPM_NODEIDX_DEV_MIN; 62 63 assert(irq <= IRQ_MAX); 64 65 switch (irq) { 66 case 13: 67 dev_idx = XPM_NODEIDX_DEV_GPIO; 68 break; 69 case 14: 70 dev_idx = XPM_NODEIDX_DEV_I2C_0; 71 break; 72 case 15: 73 dev_idx = XPM_NODEIDX_DEV_I2C_1; 74 break; 75 case 16: 76 dev_idx = XPM_NODEIDX_DEV_SPI_0; 77 break; 78 case 17: 79 dev_idx = XPM_NODEIDX_DEV_SPI_1; 80 break; 81 case 18: 82 dev_idx = XPM_NODEIDX_DEV_UART_0; 83 break; 84 case 19: 85 dev_idx = XPM_NODEIDX_DEV_UART_1; 86 break; 87 case 20: 88 dev_idx = XPM_NODEIDX_DEV_CAN_FD_0; 89 break; 90 case 21: 91 dev_idx = XPM_NODEIDX_DEV_CAN_FD_1; 92 break; 93 case 22: 94 case 23: 95 case 24: 96 case 25: 97 case 26: 98 dev_idx = XPM_NODEIDX_DEV_USB_0; 99 break; 100 case 37: 101 case 38: 102 case 39: 103 dev_idx = XPM_NODEIDX_DEV_TTC_0; 104 break; 105 case 40: 106 case 41: 107 case 42: 108 dev_idx = XPM_NODEIDX_DEV_TTC_1; 109 break; 110 case 43: 111 case 44: 112 case 45: 113 dev_idx = XPM_NODEIDX_DEV_TTC_2; 114 break; 115 case 46: 116 case 47: 117 case 48: 118 dev_idx = XPM_NODEIDX_DEV_TTC_3; 119 break; 120 case 56: 121 case 57: 122 dev_idx = XPM_NODEIDX_DEV_GEM_0; 123 break; 124 default: 125 dev_idx = XPM_NODEIDX_DEV_MIN; 126 break; 127 } 128 129 return dev_idx; 130 } 131 132 /** 133 * pm_client_suspend() - Client-specific suspend actions 134 * 135 * This function should contain any PU-specific actions 136 * required prior to sending suspend request to PMU 137 * Actions taken depend on the state system is suspending to. 138 */ 139 void pm_client_suspend(const struct pm_proc *proc, uint32_t state) 140 { 141 bakery_lock_get(&pm_client_secure_lock); 142 143 if (state == PM_STATE_SUSPEND_TO_RAM) { 144 pm_client_set_wakeup_sources((uint32_t)proc->node_id); 145 } 146 147 /* Set powerdown request */ 148 mmio_write_32(FPD_APU_PWRCTL, mmio_read_32(FPD_APU_PWRCTL) | 149 (uint32_t)proc->pwrdn_mask); 150 151 bakery_lock_release(&pm_client_secure_lock); 152 } 153 154 /** 155 * pm_client_abort_suspend() - Client-specific abort-suspend actions 156 * 157 * This function should contain any PU-specific actions 158 * required for aborting a prior suspend request 159 */ 160 void pm_client_abort_suspend(void) 161 { 162 /* Enable interrupts at processor level (for current cpu) */ 163 gicv3_cpuif_enable(plat_my_core_pos()); 164 165 bakery_lock_get(&pm_client_secure_lock); 166 167 /* Clear powerdown request */ 168 mmio_write_32(FPD_APU_PWRCTL, mmio_read_32(FPD_APU_PWRCTL) & 169 ~((uint32_t)primary_proc->pwrdn_mask)); 170 171 bakery_lock_release(&pm_client_secure_lock); 172 } 173 174 /** 175 * pm_get_cpuid() - get the local cpu ID for a global node ID 176 * @nid: node id of the processor 177 * 178 * Return: the cpu ID (starting from 0) for the subsystem 179 */ 180 static uint32_t pm_get_cpuid(uint32_t nid) 181 { 182 for (size_t i = 0U; i < ARRAY_SIZE(pm_procs_all); i++) { 183 if (pm_procs_all[i].node_id == nid) { 184 return i; 185 } 186 } 187 return UNDEFINED_CPUID; 188 } 189 190 /** 191 * pm_client_wakeup() - Client-specific wakeup actions 192 * 193 * This function should contain any PU-specific actions 194 * required for waking up another APU core 195 */ 196 void pm_client_wakeup(const struct pm_proc *proc) 197 { 198 uint32_t cpuid = pm_get_cpuid(proc->node_id); 199 200 if (cpuid == UNDEFINED_CPUID) { 201 return; 202 } 203 204 bakery_lock_get(&pm_client_secure_lock); 205 206 /* clear powerdown bit for affected cpu */ 207 uint32_t val = mmio_read_32(FPD_APU_PWRCTL); 208 val &= ~(proc->pwrdn_mask); 209 mmio_write_32(FPD_APU_PWRCTL, val); 210 211 bakery_lock_release(&pm_client_secure_lock); 212 } 213 214 /** 215 * pm_get_proc() - returns pointer to the proc structure 216 * @cpuid: id of the cpu whose proc struct pointer should be returned 217 * 218 * Return: pointer to a proc structure if proc is found, otherwise NULL 219 */ 220 const struct pm_proc *pm_get_proc(uint32_t cpuid) 221 { 222 if (cpuid < ARRAY_SIZE(pm_procs_all)) { 223 return &pm_procs_all[cpuid]; 224 } 225 226 return NULL; 227 } 228