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 */ 60 enum pm_device_node_idx irq_to_pm_node_idx(uint32_t irq) 61 { 62 enum pm_device_node_idx dev_idx = XPM_NODEIDX_DEV_MIN; 63 64 assert(irq <= IRQ_MAX); 65 66 switch (irq) { 67 case 13: 68 dev_idx = XPM_NODEIDX_DEV_GPIO; 69 break; 70 case 14: 71 dev_idx = XPM_NODEIDX_DEV_I2C_0; 72 break; 73 case 15: 74 dev_idx = XPM_NODEIDX_DEV_I2C_1; 75 break; 76 case 16: 77 dev_idx = XPM_NODEIDX_DEV_SPI_0; 78 break; 79 case 17: 80 dev_idx = XPM_NODEIDX_DEV_SPI_1; 81 break; 82 case 18: 83 dev_idx = XPM_NODEIDX_DEV_UART_0; 84 break; 85 case 19: 86 dev_idx = XPM_NODEIDX_DEV_UART_1; 87 break; 88 case 20: 89 dev_idx = XPM_NODEIDX_DEV_CAN_FD_0; 90 break; 91 case 21: 92 dev_idx = XPM_NODEIDX_DEV_CAN_FD_1; 93 break; 94 case 22: 95 case 23: 96 case 24: 97 case 25: 98 case 26: 99 dev_idx = XPM_NODEIDX_DEV_USB_0; 100 break; 101 case 37: 102 case 38: 103 case 39: 104 dev_idx = XPM_NODEIDX_DEV_TTC_0; 105 break; 106 case 40: 107 case 41: 108 case 42: 109 dev_idx = XPM_NODEIDX_DEV_TTC_1; 110 break; 111 case 43: 112 case 44: 113 case 45: 114 dev_idx = XPM_NODEIDX_DEV_TTC_2; 115 break; 116 case 46: 117 case 47: 118 case 48: 119 dev_idx = XPM_NODEIDX_DEV_TTC_3; 120 break; 121 case 56: 122 case 57: 123 dev_idx = XPM_NODEIDX_DEV_GEM_0; 124 break; 125 case 58: 126 case 59: 127 dev_idx = XPM_NODEIDX_DEV_GEM_1; 128 break; 129 case 60: 130 dev_idx = XPM_NODEIDX_DEV_ADMA_0; 131 break; 132 case 61: 133 dev_idx = XPM_NODEIDX_DEV_ADMA_1; 134 break; 135 case 62: 136 dev_idx = XPM_NODEIDX_DEV_ADMA_2; 137 break; 138 case 63: 139 dev_idx = XPM_NODEIDX_DEV_ADMA_3; 140 break; 141 case 64: 142 dev_idx = XPM_NODEIDX_DEV_ADMA_4; 143 break; 144 case 65: 145 dev_idx = XPM_NODEIDX_DEV_ADMA_5; 146 break; 147 case 66: 148 dev_idx = XPM_NODEIDX_DEV_ADMA_6; 149 break; 150 case 67: 151 dev_idx = XPM_NODEIDX_DEV_ADMA_7; 152 break; 153 case 74: 154 dev_idx = XPM_NODEIDX_DEV_USB_0; 155 break; 156 case 126: 157 case 127: 158 dev_idx = XPM_NODEIDX_DEV_SDIO_0; 159 break; 160 case 128: 161 case 129: 162 dev_idx = XPM_NODEIDX_DEV_SDIO_1; 163 break; 164 case 142: 165 dev_idx = XPM_NODEIDX_DEV_RTC; 166 break; 167 default: 168 dev_idx = XPM_NODEIDX_DEV_MIN; 169 break; 170 } 171 172 return dev_idx; 173 } 174 175 /** 176 * pm_client_suspend() - Client-specific suspend actions. 177 * @proc: processor which need to suspend. 178 * @state: desired suspend state. 179 * 180 * This function should contain any PU-specific actions 181 * required prior to sending suspend request to PMU 182 * Actions taken depend on the state system is suspending to. 183 * 184 */ 185 void pm_client_suspend(const struct pm_proc *proc, uint32_t state) 186 { 187 bakery_lock_get(&pm_client_secure_lock); 188 189 if (state == PM_STATE_SUSPEND_TO_RAM) { 190 pm_client_set_wakeup_sources((uint32_t)proc->node_id); 191 } 192 193 /* Set powerdown request */ 194 mmio_write_32(FPD_APU_PWRCTL, mmio_read_32(FPD_APU_PWRCTL) | 195 (uint32_t)proc->pwrdn_mask); 196 197 bakery_lock_release(&pm_client_secure_lock); 198 } 199 200 /** 201 * pm_client_abort_suspend() - Client-specific abort-suspend actions. 202 * 203 * This function should contain any PU-specific actions 204 * required for aborting a prior suspend request. 205 * 206 */ 207 void pm_client_abort_suspend(void) 208 { 209 /* Enable interrupts at processor level (for current cpu) */ 210 gicv3_cpuif_enable(plat_my_core_pos()); 211 212 bakery_lock_get(&pm_client_secure_lock); 213 214 /* Clear powerdown request */ 215 mmio_write_32(FPD_APU_PWRCTL, mmio_read_32(FPD_APU_PWRCTL) & 216 ~((uint32_t)primary_proc->pwrdn_mask)); 217 218 bakery_lock_release(&pm_client_secure_lock); 219 } 220 221 /** 222 * pm_get_cpuid() - get the local cpu ID for a global node ID. 223 * @nid: node id of the processor. 224 * 225 * Return: the cpu ID (starting from 0) for the subsystem. 226 * 227 */ 228 static uint32_t pm_get_cpuid(uint32_t nid) 229 { 230 for (size_t i = 0U; i < ARRAY_SIZE(pm_procs_all); i++) { 231 if (pm_procs_all[i].node_id == nid) { 232 return i; 233 } 234 } 235 return UNDEFINED_CPUID; 236 } 237 238 /** 239 * pm_client_wakeup() - Client-specific wakeup actions. 240 * @proc: Processor which need to wakeup. 241 * 242 * This function should contain any PU-specific actions 243 * required for waking up another APU core. 244 * 245 */ 246 void pm_client_wakeup(const struct pm_proc *proc) 247 { 248 uint32_t cpuid = pm_get_cpuid(proc->node_id); 249 250 if (cpuid == UNDEFINED_CPUID) { 251 return; 252 } 253 254 bakery_lock_get(&pm_client_secure_lock); 255 256 /* clear powerdown bit for affected cpu */ 257 uint32_t val = mmio_read_32(FPD_APU_PWRCTL); 258 val &= ~(proc->pwrdn_mask); 259 mmio_write_32(FPD_APU_PWRCTL, val); 260 261 bakery_lock_release(&pm_client_secure_lock); 262 } 263 264 /** 265 * pm_get_proc() - returns pointer to the proc structure. 266 * @cpuid: id of the cpu whose proc struct pointer should be returned. 267 * 268 * Return: pointer to a proc structure if proc is found, otherwise NULL. 269 * 270 */ 271 const struct pm_proc *pm_get_proc(uint32_t cpuid) 272 { 273 if (cpuid < ARRAY_SIZE(pm_procs_all)) { 274 return &pm_procs_all[cpuid]; 275 } 276 277 return NULL; 278 } 279