developer | 037c99f | 2020-06-15 16:41:03 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2020, MediaTek Inc. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <string.h> |
| 8 | |
| 9 | #include <drivers/delay_timer.h> |
| 10 | |
| 11 | #include <mt_cpu_pm_cpc.h> |
| 12 | #include <mt_timer.h> |
| 13 | |
| 14 | struct mtk_cpc_dev { |
| 15 | int auto_off; |
| 16 | unsigned int auto_thres_tick; |
| 17 | }; |
| 18 | |
| 19 | static struct mtk_cpc_dev cpc; |
| 20 | |
| 21 | static int mtk_cpc_last_core_prot(uint32_t prot_req, |
| 22 | uint32_t resp_reg, uint32_t resp_ofs) |
| 23 | { |
| 24 | uint32_t sta, retry; |
| 25 | |
| 26 | retry = 0U; |
| 27 | |
| 28 | while (retry++ < RETRY_CNT_MAX) { |
| 29 | |
| 30 | mmio_write_32(CPC_MCUSYS_LAST_CORE_REQ, prot_req); |
| 31 | |
| 32 | udelay(1U); |
| 33 | |
| 34 | sta = (mmio_read_32(resp_reg) >> resp_ofs) & CPC_PROT_RESP_MASK; |
| 35 | |
| 36 | if (sta == PROT_SUCCESS) { |
| 37 | return CPC_SUCCESS; |
| 38 | } else if (sta == PROT_GIVEUP) { |
| 39 | return CPC_ERR_FAIL; |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | return CPC_ERR_TIMEOUT; |
| 44 | } |
| 45 | |
| 46 | int mtk_cpu_pm_mcusys_prot_aquire(void) |
| 47 | { |
| 48 | return mtk_cpc_last_core_prot( |
| 49 | MCUSYS_PROT_SET, |
| 50 | CPC_MCUSYS_LAST_CORE_RESP, |
| 51 | MCUSYS_RESP_OFS); |
| 52 | } |
| 53 | |
| 54 | void mtk_cpu_pm_mcusys_prot_release(void) |
| 55 | { |
| 56 | mmio_write_32(CPC_MCUSYS_PWR_ON_MASK, MCUSYS_PROT_CLR); |
| 57 | } |
| 58 | |
| 59 | int mtk_cpu_pm_cluster_prot_aquire(unsigned int cluster) |
| 60 | { |
| 61 | return mtk_cpc_last_core_prot( |
| 62 | CPUSYS_PROT_SET, |
| 63 | CPC_MCUSYS_MP_LAST_CORE_RESP, |
| 64 | CPUSYS_RESP_OFS); |
| 65 | } |
| 66 | |
| 67 | void mtk_cpu_pm_cluster_prot_release(unsigned int cluster) |
| 68 | { |
| 69 | mmio_write_32(CPC_MCUSYS_PWR_ON_MASK, CPUSYS_PROT_CLR); |
| 70 | } |
| 71 | |
| 72 | static void mtk_cpc_cluster_cnt_backup(void) |
| 73 | { |
| 74 | uint32_t backup_cnt; |
| 75 | uint32_t curr_cnt; |
| 76 | uint32_t cnt_mask = GENMASK(14, 0); |
| 77 | uint32_t clr_mask = GENMASK(1, 0); |
| 78 | |
| 79 | /* Single Cluster */ |
| 80 | backup_cnt = mmio_read_32(CPC_CLUSTER_CNT_BACKUP); |
| 81 | curr_cnt = mmio_read_32(CPC_MCUSYS_CLUSTER_COUNTER); |
| 82 | |
| 83 | /* Get off count if dormant count is 0 */ |
| 84 | if ((curr_cnt & cnt_mask) == 0U) { |
| 85 | curr_cnt = (curr_cnt >> 16) & cnt_mask; |
| 86 | } else { |
| 87 | curr_cnt = curr_cnt & cnt_mask; |
| 88 | } |
| 89 | |
| 90 | mmio_write_32(CPC_CLUSTER_CNT_BACKUP, backup_cnt + curr_cnt); |
| 91 | mmio_write_32(CPC_MCUSYS_CLUSTER_COUNTER_CLR, clr_mask); |
| 92 | } |
| 93 | |
| 94 | static inline void mtk_cpc_mcusys_off_en(void) |
| 95 | { |
| 96 | mmio_write_32(CPC_MCUSYS_PWR_CTRL, 1U); |
| 97 | } |
| 98 | |
| 99 | static inline void mtk_cpc_mcusys_off_dis(void) |
| 100 | { |
| 101 | mmio_write_32(CPC_MCUSYS_PWR_CTRL, 0U); |
| 102 | } |
| 103 | |
| 104 | void mtk_cpc_mcusys_off_reflect(void) |
| 105 | { |
| 106 | mtk_cpc_mcusys_off_dis(); |
| 107 | mtk_cpu_pm_mcusys_prot_release(); |
| 108 | } |
| 109 | |
| 110 | int mtk_cpc_mcusys_off_prepare(void) |
| 111 | { |
| 112 | if (mtk_cpu_pm_mcusys_prot_aquire() != CPC_SUCCESS) { |
| 113 | return CPC_ERR_FAIL; |
| 114 | } |
| 115 | |
| 116 | mtk_cpc_cluster_cnt_backup(); |
| 117 | mtk_cpc_mcusys_off_en(); |
| 118 | |
| 119 | return CPC_SUCCESS; |
| 120 | } |
| 121 | |
| 122 | void mtk_cpc_core_on_hint_set(unsigned int cpu) |
| 123 | { |
| 124 | mmio_write_32(CPC_MCUSYS_CPU_ON_SW_HINT_SET, BIT(cpu)); |
| 125 | } |
| 126 | |
| 127 | void mtk_cpc_core_on_hint_clr(unsigned int cpu) |
| 128 | { |
| 129 | mmio_write_32(CPC_MCUSYS_CPU_ON_SW_HINT_CLR, BIT(cpu)); |
| 130 | } |
| 131 | |
| 132 | static void mtk_cpc_dump_timestamp(void) |
| 133 | { |
| 134 | uint32_t id; |
| 135 | |
| 136 | for (id = 0U; id < CPC_TRACE_ID_NUM; id++) { |
| 137 | mmio_write_32(CPC_MCUSYS_TRACE_SEL, id); |
| 138 | |
| 139 | memcpy((void *)(uintptr_t)CPC_TRACE_SRAM(id), |
| 140 | (const void *)(uintptr_t)CPC_MCUSYS_TRACE_DATA, |
| 141 | CPC_TRACE_SIZE); |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | void mtk_cpc_time_sync(void) |
| 146 | { |
| 147 | uint64_t kt; |
| 148 | uint32_t systime_l, systime_h; |
| 149 | |
| 150 | kt = sched_clock(); |
| 151 | systime_l = mmio_read_32(CNTSYS_L_REG); |
| 152 | systime_h = mmio_read_32(CNTSYS_H_REG); |
| 153 | |
| 154 | /* sync kernel timer to cpc */ |
| 155 | mmio_write_32(CPC_MCUSYS_CPC_KERNEL_TIME_L_BASE, (uint32_t)kt); |
| 156 | mmio_write_32(CPC_MCUSYS_CPC_KERNEL_TIME_H_BASE, (uint32_t)(kt >> 32)); |
| 157 | /* sync system timer to cpc */ |
| 158 | mmio_write_32(CPC_MCUSYS_CPC_SYSTEM_TIME_L_BASE, systime_l); |
| 159 | mmio_write_32(CPC_MCUSYS_CPC_SYSTEM_TIME_H_BASE, systime_h); |
| 160 | } |
| 161 | |
| 162 | static void mtk_cpc_config(uint32_t cfg, uint32_t data) |
| 163 | { |
| 164 | uint32_t val; |
| 165 | uint32_t reg = 0U; |
| 166 | |
| 167 | switch (cfg) { |
| 168 | case CPC_SMC_CONFIG_PROF: |
| 169 | reg = CPC_MCUSYS_CPC_DBG_SETTING; |
| 170 | val = mmio_read_32(reg); |
| 171 | val = (data != 0U) ? (val | CPC_PROF_EN) : (val & ~CPC_PROF_EN); |
| 172 | break; |
| 173 | case CPC_SMC_CONFIG_AUTO_OFF: |
| 174 | reg = CPC_MCUSYS_CPC_FLOW_CTRL_CFG; |
| 175 | val = mmio_read_32(reg); |
| 176 | if (data != 0U) { |
| 177 | val |= CPC_AUTO_OFF_EN; |
| 178 | cpc.auto_off = 1; |
| 179 | } else { |
| 180 | val &= ~CPC_AUTO_OFF_EN; |
| 181 | cpc.auto_off = 0; |
| 182 | } |
| 183 | break; |
| 184 | case CPC_SMC_CONFIG_AUTO_OFF_THRES: |
| 185 | reg = CPC_MCUSYS_CPC_OFF_THRES; |
| 186 | cpc.auto_thres_tick = us_to_ticks(data); |
| 187 | val = cpc.auto_thres_tick; |
| 188 | break; |
| 189 | case CPC_SMC_CONFIG_CNT_CLR: |
| 190 | reg = CPC_MCUSYS_CLUSTER_COUNTER_CLR; |
| 191 | val = GENMASK(1, 0); /* clr_mask */ |
| 192 | break; |
| 193 | case CPC_SMC_CONFIG_TIME_SYNC: |
| 194 | mtk_cpc_time_sync(); |
| 195 | break; |
| 196 | default: |
| 197 | break; |
| 198 | } |
| 199 | |
| 200 | if (reg != 0U) { |
| 201 | mmio_write_32(reg, val); |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | static uint32_t mtk_cpc_read_config(uint32_t cfg) |
| 206 | { |
| 207 | uint32_t res = 0U; |
| 208 | |
| 209 | switch (cfg) { |
| 210 | case CPC_SMC_CONFIG_PROF: |
| 211 | res = (mmio_read_32(CPC_MCUSYS_CPC_DBG_SETTING) & CPC_PROF_EN) ? |
| 212 | 1U : 0U; |
| 213 | break; |
| 214 | case CPC_SMC_CONFIG_AUTO_OFF: |
| 215 | res = cpc.auto_off; |
| 216 | break; |
| 217 | case CPC_SMC_CONFIG_AUTO_OFF_THRES: |
| 218 | res = ticks_to_us(cpc.auto_thres_tick); |
| 219 | break; |
| 220 | case CPC_SMC_CONFIG_CNT_CLR: |
| 221 | break; |
| 222 | default: |
| 223 | break; |
| 224 | } |
| 225 | |
| 226 | return res; |
| 227 | } |
| 228 | |
| 229 | uint64_t mtk_cpc_handler(uint64_t act, uint64_t arg1, uint64_t arg2) |
| 230 | { |
| 231 | uint64_t res = 0ULL; |
| 232 | |
| 233 | switch (act) { |
| 234 | case CPC_SMC_EVENT_DUMP_TRACE_DATA: |
| 235 | mtk_cpc_dump_timestamp(); |
| 236 | break; |
| 237 | case CPC_SMC_EVENT_GIC_DPG_SET: |
| 238 | /* isolated_status = x2; */ |
| 239 | break; |
| 240 | case CPC_SMC_EVENT_CPC_CONFIG: |
| 241 | mtk_cpc_config((uint32_t)arg1, (uint32_t)arg2); |
| 242 | break; |
| 243 | case CPC_SMC_EVENT_READ_CONFIG: |
| 244 | res = mtk_cpc_read_config((uint32_t)arg1); |
| 245 | break; |
| 246 | default: |
| 247 | break; |
| 248 | } |
| 249 | |
| 250 | return res; |
| 251 | } |
| 252 | |
| 253 | void mtk_cpc_init(void) |
| 254 | { |
| 255 | mmio_write_32(CPC_MCUSYS_CPC_DBG_SETTING, |
| 256 | mmio_read_32(CPC_MCUSYS_CPC_DBG_SETTING) |
| 257 | | CPC_DBG_EN |
| 258 | | CPC_CALC_EN); |
| 259 | |
| 260 | cpc.auto_off = 1; |
| 261 | cpc.auto_thres_tick = us_to_ticks(8000); |
| 262 | |
| 263 | mmio_write_32(CPC_MCUSYS_CPC_FLOW_CTRL_CFG, |
| 264 | mmio_read_32(CPC_MCUSYS_CPC_FLOW_CTRL_CFG) |
| 265 | | CPC_OFF_PRE_EN |
| 266 | | (cpc.auto_off ? CPC_AUTO_OFF_EN : 0U)); |
| 267 | |
| 268 | mmio_write_32(CPC_MCUSYS_CPC_OFF_THRES, cpc.auto_thres_tick); |
| 269 | } |