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_LOCAL_ID, 33 .remote_ipi_id = IPI_REMOTE_ID, 34 .buffer_base = IPI_BUFFER_LOCAL_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 case 58: 125 case 59: 126 dev_idx = XPM_NODEIDX_DEV_GEM_1; 127 break; 128 case 60: 129 dev_idx = XPM_NODEIDX_DEV_ADMA_0; 130 break; 131 case 61: 132 dev_idx = XPM_NODEIDX_DEV_ADMA_1; 133 break; 134 case 62: 135 dev_idx = XPM_NODEIDX_DEV_ADMA_2; 136 break; 137 case 63: 138 dev_idx = XPM_NODEIDX_DEV_ADMA_3; 139 break; 140 case 64: 141 dev_idx = XPM_NODEIDX_DEV_ADMA_4; 142 break; 143 case 65: 144 dev_idx = XPM_NODEIDX_DEV_ADMA_5; 145 break; 146 case 66: 147 dev_idx = XPM_NODEIDX_DEV_ADMA_6; 148 break; 149 case 67: 150 dev_idx = XPM_NODEIDX_DEV_ADMA_7; 151 break; 152 case 74: 153 dev_idx = XPM_NODEIDX_DEV_USB_0; 154 break; 155 case 126: 156 case 127: 157 dev_idx = XPM_NODEIDX_DEV_SDIO_0; 158 break; 159 case 128: 160 case 129: 161 dev_idx = XPM_NODEIDX_DEV_SDIO_1; 162 break; 163 case 142: 164 dev_idx = XPM_NODEIDX_DEV_RTC; 165 break; 166 default: 167 dev_idx = XPM_NODEIDX_DEV_MIN; 168 break; 169 } 170 171 return dev_idx; 172 } 173 174 /** 175 * pm_client_suspend() - Client-specific suspend actions 176 * 177 * This function should contain any PU-specific actions 178 * required prior to sending suspend request to PMU 179 * Actions taken depend on the state system is suspending to. 180 */ 181 void pm_client_suspend(const struct pm_proc *proc, uint32_t state) 182 { 183 bakery_lock_get(&pm_client_secure_lock); 184 185 if (state == PM_STATE_SUSPEND_TO_RAM) { 186 pm_client_set_wakeup_sources((uint32_t)proc->node_id); 187 } 188 189 /* Set powerdown request */ 190 mmio_write_32(FPD_APU_PWRCTL, mmio_read_32(FPD_APU_PWRCTL) | 191 (uint32_t)proc->pwrdn_mask); 192 193 bakery_lock_release(&pm_client_secure_lock); 194 } 195 196 /** 197 * pm_client_abort_suspend() - Client-specific abort-suspend actions 198 * 199 * This function should contain any PU-specific actions 200 * required for aborting a prior suspend request 201 */ 202 void pm_client_abort_suspend(void) 203 { 204 /* Enable interrupts at processor level (for current cpu) */ 205 gicv3_cpuif_enable(plat_my_core_pos()); 206 207 bakery_lock_get(&pm_client_secure_lock); 208 209 /* Clear powerdown request */ 210 mmio_write_32(FPD_APU_PWRCTL, mmio_read_32(FPD_APU_PWRCTL) & 211 ~((uint32_t)primary_proc->pwrdn_mask)); 212 213 bakery_lock_release(&pm_client_secure_lock); 214 } 215 216 /** 217 * pm_get_cpuid() - get the local cpu ID for a global node ID 218 * @nid: node id of the processor 219 * 220 * Return: the cpu ID (starting from 0) for the subsystem 221 */ 222 static uint32_t pm_get_cpuid(uint32_t nid) 223 { 224 for (size_t i = 0U; i < ARRAY_SIZE(pm_procs_all); i++) { 225 if (pm_procs_all[i].node_id == nid) { 226 return i; 227 } 228 } 229 return UNDEFINED_CPUID; 230 } 231 232 /** 233 * pm_client_wakeup() - Client-specific wakeup actions 234 * 235 * This function should contain any PU-specific actions 236 * required for waking up another APU core 237 */ 238 void pm_client_wakeup(const struct pm_proc *proc) 239 { 240 uint32_t cpuid = pm_get_cpuid(proc->node_id); 241 242 if (cpuid == UNDEFINED_CPUID) { 243 return; 244 } 245 246 bakery_lock_get(&pm_client_secure_lock); 247 248 /* clear powerdown bit for affected cpu */ 249 uint32_t val = mmio_read_32(FPD_APU_PWRCTL); 250 val &= ~(proc->pwrdn_mask); 251 mmio_write_32(FPD_APU_PWRCTL, val); 252 253 bakery_lock_release(&pm_client_secure_lock); 254 } 255 256 /** 257 * pm_get_proc() - returns pointer to the proc structure 258 * @cpuid: id of the cpu whose proc struct pointer should be returned 259 * 260 * Return: pointer to a proc structure if proc is found, otherwise NULL 261 */ 262 const struct pm_proc *pm_get_proc(uint32_t cpuid) 263 { 264 if (cpuid < ARRAY_SIZE(pm_procs_all)) { 265 return &pm_procs_all[cpuid]; 266 } 267 268 return NULL; 269 } 270