1 // Copyright 2015-2017 Espressif Systems (Shanghai) PTE LTD
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
7 // http://www.apache.org/licenses/LICENSE-2.0
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
18 #include "soc/rtc_cntl_reg.h"
19 #include "soc/dport_reg.h"
21 #include "soc/i2s_reg.h"
22 #include "soc/timer_group_reg.h"
23 #include "soc/bb_reg.h"
24 #include "soc/nrx_reg.h"
25 #include "soc/fe_reg.h"
27 #include "rom/ets_sys.h"
31 /* Various delays to be programmed into power control state machines */
32 #define RTC_CNTL_XTL_BUF_WAIT_SLP 2
33 #define RTC_CNTL_PLL_BUF_WAIT_SLP 2
34 #define RTC_CNTL_CK8M_WAIT_SLP 4
35 #define OTHER_BLOCKS_POWERUP 1
36 #define OTHER_BLOCKS_WAIT 1
38 #define ROM_RAM_POWERUP_CYCLES OTHER_BLOCKS_POWERUP
39 #define ROM_RAM_WAIT_CYCLES OTHER_BLOCKS_WAIT
41 #define WIFI_POWERUP_CYCLES OTHER_BLOCKS_POWERUP
42 #define WIFI_WAIT_CYCLES OTHER_BLOCKS_WAIT
44 #define RTC_POWERUP_CYCLES OTHER_BLOCKS_POWERUP
45 #define RTC_WAIT_CYCLES OTHER_BLOCKS_WAIT
47 #define DG_WRAP_POWERUP_CYCLES OTHER_BLOCKS_POWERUP
48 #define DG_WRAP_WAIT_CYCLES OTHER_BLOCKS_WAIT
50 #define RTC_MEM_POWERUP_CYCLES OTHER_BLOCKS_POWERUP
51 #define RTC_MEM_WAIT_CYCLES OTHER_BLOCKS_WAIT
54 * @brief Power down flags for rtc_sleep_pd function
57 uint32_t dig_pd : 1; //!< Set to 1 to power down digital part in sleep
58 uint32_t rtc_pd : 1; //!< Set to 1 to power down RTC memories in sleep
59 uint32_t cpu_pd : 1; //!< Set to 1 to power down digital memories and CPU in sleep
60 uint32_t i2s_pd : 1; //!< Set to 1 to power down I2S in sleep
61 uint32_t bb_pd : 1; //!< Set to 1 to power down WiFi in sleep
62 uint32_t nrx_pd : 1; //!< Set to 1 to power down WiFi in sleep
63 uint32_t fe_pd : 1; //!< Set to 1 to power down WiFi in sleep
64 } rtc_sleep_pd_config_t;
67 * Initializer for rtc_sleep_pd_config_t which sets all flags to the same value
69 #define RTC_SLEEP_PD_CONFIG_ALL(val) {\
80 * Configure whether certain peripherals are powered down in deep sleep
81 * @param cfg power down flags as rtc_sleep_pd_config_t structure
83 static void rtc_sleep_pd(rtc_sleep_pd_config_t cfg)
85 REG_SET_FIELD(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_LSLP_MEM_FORCE_PU, ~cfg.dig_pd);
86 REG_SET_FIELD(RTC_CNTL_PWC_REG, RTC_CNTL_SLOWMEM_FORCE_LPU, ~cfg.rtc_pd);
87 REG_SET_FIELD(RTC_CNTL_PWC_REG, RTC_CNTL_FASTMEM_FORCE_LPU, ~cfg.rtc_pd);
88 DPORT_REG_SET_FIELD(DPORT_MEM_PD_MASK_REG, DPORT_LSLP_MEM_PD_MASK, ~cfg.cpu_pd);
89 REG_SET_FIELD(I2S_PD_CONF_REG(0), I2S_PLC_MEM_FORCE_PU, ~cfg.i2s_pd);
90 REG_SET_FIELD(I2S_PD_CONF_REG(0), I2S_FIFO_FORCE_PU, ~cfg.i2s_pd);
91 REG_SET_FIELD(BBPD_CTRL, BB_FFT_FORCE_PU, ~cfg.bb_pd);
92 REG_SET_FIELD(BBPD_CTRL, BB_DC_EST_FORCE_PU, ~cfg.bb_pd);
93 REG_SET_FIELD(NRXPD_CTRL, NRX_RX_ROT_FORCE_PU, ~cfg.nrx_pd);
94 REG_SET_FIELD(NRXPD_CTRL, NRX_VIT_FORCE_PU, ~cfg.nrx_pd);
95 REG_SET_FIELD(NRXPD_CTRL, NRX_DEMAP_FORCE_PU, ~cfg.nrx_pd);
96 REG_SET_FIELD(FE_GEN_CTRL, FE_IQ_EST_FORCE_PU, ~cfg.fe_pd);
97 REG_SET_FIELD(FE2_TX_INTERP_CTRL, FE2_TX_INF_FORCE_PU, ~cfg.fe_pd);
100 void rtc_sleep_init(rtc_sleep_config_t cfg)
102 // set 5 PWC state machine times to fit in main state machine time
103 REG_SET_FIELD(RTC_CNTL_TIMER1_REG, RTC_CNTL_PLL_BUF_WAIT, RTC_CNTL_PLL_BUF_WAIT_SLP);
104 REG_SET_FIELD(RTC_CNTL_TIMER1_REG, RTC_CNTL_XTL_BUF_WAIT, RTC_CNTL_XTL_BUF_WAIT_SLP);
105 REG_SET_FIELD(RTC_CNTL_TIMER1_REG, RTC_CNTL_CK8M_WAIT, RTC_CNTL_CK8M_WAIT_SLP);
107 // set shortest possible sleep time limit
108 REG_SET_FIELD(RTC_CNTL_TIMER5_REG, RTC_CNTL_MIN_SLP_VAL, RTC_CNTL_MIN_SLP_VAL_MIN);
111 REG_SET_FIELD(RTC_CNTL_TIMER3_REG, RTC_CNTL_ROM_RAM_POWERUP_TIMER, ROM_RAM_POWERUP_CYCLES);
112 REG_SET_FIELD(RTC_CNTL_TIMER3_REG, RTC_CNTL_ROM_RAM_WAIT_TIMER, ROM_RAM_WAIT_CYCLES);
114 REG_SET_FIELD(RTC_CNTL_TIMER3_REG, RTC_CNTL_WIFI_POWERUP_TIMER, WIFI_POWERUP_CYCLES);
115 REG_SET_FIELD(RTC_CNTL_TIMER3_REG, RTC_CNTL_WIFI_WAIT_TIMER, WIFI_WAIT_CYCLES);
116 // set rtc peri timer
117 REG_SET_FIELD(RTC_CNTL_TIMER4_REG, RTC_CNTL_POWERUP_TIMER, RTC_POWERUP_CYCLES);
118 REG_SET_FIELD(RTC_CNTL_TIMER4_REG, RTC_CNTL_WAIT_TIMER, RTC_WAIT_CYCLES);
119 // set digital wrap timer
120 REG_SET_FIELD(RTC_CNTL_TIMER4_REG, RTC_CNTL_DG_WRAP_POWERUP_TIMER, DG_WRAP_POWERUP_CYCLES);
121 REG_SET_FIELD(RTC_CNTL_TIMER4_REG, RTC_CNTL_DG_WRAP_WAIT_TIMER, DG_WRAP_WAIT_CYCLES);
122 // set rtc memory timer
123 REG_SET_FIELD(RTC_CNTL_TIMER5_REG, RTC_CNTL_RTCMEM_POWERUP_TIMER, RTC_MEM_POWERUP_CYCLES);
124 REG_SET_FIELD(RTC_CNTL_TIMER5_REG, RTC_CNTL_RTCMEM_WAIT_TIMER, RTC_MEM_WAIT_CYCLES);
126 REG_SET_FIELD(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_LSLP_MEM_FORCE_PU, cfg.lslp_mem_inf_fpu);
128 rtc_sleep_pd_config_t pd_cfg = RTC_SLEEP_PD_CONFIG_ALL(cfg.lslp_meminf_pd);
129 rtc_sleep_pd(pd_cfg);
131 if (cfg.rtc_mem_inf_fpu) {
132 SET_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_MEM_FORCE_PU);
134 CLEAR_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_MEM_FORCE_PU);
137 if (cfg.rtc_mem_inf_follow_cpu) {
138 SET_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_MEM_FOLW_CPU);
140 CLEAR_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_MEM_FOLW_CPU);
143 if (cfg.rtc_fastmem_pd_en) {
144 SET_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_FASTMEM_PD_EN);
145 CLEAR_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_FASTMEM_FORCE_PU);
146 CLEAR_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_FASTMEM_FORCE_NOISO);
148 CLEAR_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_FASTMEM_PD_EN);
149 SET_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_FASTMEM_FORCE_PU);
150 SET_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_FASTMEM_FORCE_NOISO);
153 if (cfg.rtc_slowmem_pd_en) {
154 SET_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_SLOWMEM_PD_EN);
155 CLEAR_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_SLOWMEM_FORCE_PU);
156 CLEAR_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_SLOWMEM_FORCE_NOISO);
158 CLEAR_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_SLOWMEM_PD_EN);
159 SET_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_SLOWMEM_FORCE_PU);
160 SET_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_SLOWMEM_FORCE_NOISO);
163 if (cfg.rtc_peri_pd_en) {
164 SET_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_PD_EN);
166 CLEAR_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_PD_EN);
169 if (cfg.wifi_pd_en) {
170 SET_PERI_REG_MASK(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_WIFI_PD_EN);
172 CLEAR_PERI_REG_MASK(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_WIFI_PD_EN);
175 if (cfg.rom_mem_pd_en) {
176 SET_PERI_REG_MASK(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_CPU_ROM_RAM_PD_EN);
178 CLEAR_PERI_REG_MASK(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_CPU_ROM_RAM_PD_EN);
182 CLEAR_PERI_REG_MASK(RTC_CNTL_DIG_ISO_REG,
183 RTC_CNTL_DG_PAD_FORCE_ISO | RTC_CNTL_DG_PAD_FORCE_NOISO);
184 SET_PERI_REG_MASK(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_DG_WRAP_PD_EN);
185 CLEAR_PERI_REG_MASK(RTC_CNTL_DIG_PWC_REG,
186 RTC_CNTL_DG_WRAP_FORCE_PU | RTC_CNTL_DG_WRAP_FORCE_PD);
187 CLEAR_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_BIAS_FORCE_NOSLEEP);
189 // Shut down parts of RTC which may have been left enabled by the wireless drivers
190 CLEAR_PERI_REG_MASK(RTC_CNTL_ANA_CONF_REG,
191 RTC_CNTL_CKGEN_I2C_PU | RTC_CNTL_PLL_I2C_PU |
192 RTC_CNTL_RFRX_PBUS_PU | RTC_CNTL_TXRF_I2C_PU);
194 CLEAR_PERI_REG_MASK(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_DG_WRAP_PD_EN);
195 REG_SET_FIELD(RTC_CNTL_BIAS_CONF_REG, RTC_CNTL_DBG_ATTEN, 0);
198 REG_SET_FIELD(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_XTL_FORCE_PU, cfg.xtal_fpu);
200 /* enable VDDSDIO control by state machine */
201 REG_CLR_BIT(RTC_CNTL_SDIO_CONF_REG, RTC_CNTL_SDIO_FORCE);
202 REG_SET_FIELD(RTC_CNTL_SDIO_CONF_REG, RTC_CNTL_SDIO_PD_EN, cfg.vddsdio_pd_en);
204 REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DBIAS_SLP, cfg.rtc_dbias_slp);
205 REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DBIAS_WAK, cfg.rtc_dbias_wak);
206 REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DIG_DBIAS_WAK, cfg.dig_dbias_wak);
207 REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DIG_DBIAS_SLP, cfg.dig_dbias_slp);
210 void rtc_sleep_set_wakeup_time(uint64_t t)
212 WRITE_PERI_REG(RTC_CNTL_SLP_TIMER0_REG, t & UINT32_MAX);
213 WRITE_PERI_REG(RTC_CNTL_SLP_TIMER1_REG, t >> 32);
216 uint32_t rtc_sleep_start(uint32_t wakeup_opt, uint32_t reject_opt)
218 REG_SET_FIELD(RTC_CNTL_WAKEUP_STATE_REG, RTC_CNTL_WAKEUP_ENA, wakeup_opt);
219 WRITE_PERI_REG(RTC_CNTL_SLP_REJECT_CONF_REG, reject_opt);
221 /* Start entry into sleep mode */
222 SET_PERI_REG_MASK(RTC_CNTL_STATE0_REG, RTC_CNTL_SLEEP_EN);
224 while (GET_PERI_REG_MASK(RTC_CNTL_INT_RAW_REG,
225 RTC_CNTL_SLP_REJECT_INT_RAW | RTC_CNTL_SLP_WAKEUP_INT_RAW) == 0) {
228 /* In deep sleep mode, we never get here */
229 uint32_t reject = REG_GET_FIELD(RTC_CNTL_INT_RAW_REG, RTC_CNTL_SLP_REJECT_INT_RAW);
230 SET_PERI_REG_MASK(RTC_CNTL_INT_CLR_REG,
231 RTC_CNTL_SLP_REJECT_INT_CLR | RTC_CNTL_SLP_WAKEUP_INT_CLR);
233 /* restore DBG_ATTEN to the default value */
234 REG_SET_FIELD(RTC_CNTL_BIAS_CONF_REG, RTC_CNTL_DBG_ATTEN, RTC_CNTL_DBG_ATTEN_DEFAULT);