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 ROM_RAM_POWERUP_DELAY 3
33 #define ROM_RAM_WAIT_DELAY 3
34 #define WIFI_POWERUP_DELAY 3
35 #define WIFI_WAIT_DELAY 3
36 #define RTC_POWERUP_DELAY 3
37 #define RTC_WAIT_DELAY 3
38 #define DG_WRAP_POWERUP_DELAY 3
39 #define DG_WRAP_WAIT_DELAY 3
40 #define RTC_MEM_POWERUP_DELAY 3
41 #define RTC_MEM_WAIT_DELAY 3
44 * @brief Power down flags for rtc_sleep_pd function
47 uint32_t dig_pd : 1; //!< Set to 1 to power down digital part in sleep
48 uint32_t rtc_pd : 1; //!< Set to 1 to power down RTC memories in sleep
49 uint32_t cpu_pd : 1; //!< Set to 1 to power down digital memories and CPU in sleep
50 uint32_t i2s_pd : 1; //!< Set to 1 to power down I2S in sleep
51 uint32_t bb_pd : 1; //!< Set to 1 to power down WiFi in sleep
52 uint32_t nrx_pd : 1; //!< Set to 1 to power down WiFi in sleep
53 uint32_t fe_pd : 1; //!< Set to 1 to power down WiFi in sleep
54 } rtc_sleep_pd_config_t;
57 * Initializer for rtc_sleep_pd_config_t which sets all flags to the same value
59 #define RTC_SLEEP_PD_CONFIG_ALL(val) {\
70 * Configure whether certain peripherals are powered down in deep sleep
71 * @param cfg power down flags as rtc_sleep_pd_config_t structure
73 static void rtc_sleep_pd(rtc_sleep_pd_config_t cfg)
75 REG_SET_FIELD(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_LSLP_MEM_FORCE_PU, ~cfg.dig_pd);
76 REG_SET_FIELD(RTC_CNTL_PWC_REG, RTC_CNTL_SLOWMEM_FORCE_LPU, ~cfg.rtc_pd);
77 REG_SET_FIELD(RTC_CNTL_PWC_REG, RTC_CNTL_FASTMEM_FORCE_LPU, ~cfg.rtc_pd);
78 DPORT_REG_SET_FIELD(DPORT_MEM_PD_MASK_REG, DPORT_LSLP_MEM_PD_MASK, ~cfg.cpu_pd);
79 REG_SET_FIELD(I2S_PD_CONF_REG(0), I2S_PLC_MEM_FORCE_PU, ~cfg.i2s_pd);
80 REG_SET_FIELD(I2S_PD_CONF_REG(0), I2S_FIFO_FORCE_PU, ~cfg.i2s_pd);
81 REG_SET_FIELD(BBPD_CTRL, BB_FFT_FORCE_PU, ~cfg.bb_pd);
82 REG_SET_FIELD(BBPD_CTRL, BB_DC_EST_FORCE_PU, ~cfg.bb_pd);
83 REG_SET_FIELD(NRXPD_CTRL, NRX_RX_ROT_FORCE_PU, ~cfg.nrx_pd);
84 REG_SET_FIELD(NRXPD_CTRL, NRX_VIT_FORCE_PU, ~cfg.nrx_pd);
85 REG_SET_FIELD(NRXPD_CTRL, NRX_DEMAP_FORCE_PU, ~cfg.nrx_pd);
86 REG_SET_FIELD(FE_GEN_CTRL, FE_IQ_EST_FORCE_PU, ~cfg.fe_pd);
87 REG_SET_FIELD(FE2_TX_INTERP_CTRL, FE2_TX_INF_FORCE_PU, ~cfg.fe_pd);
90 void rtc_sleep_init(rtc_sleep_config_t cfg)
92 //set 5 PWC state machine times to fit in main state machine time
93 REG_SET_FIELD(RTC_CNTL_TIMER1_REG, RTC_CNTL_PLL_BUF_WAIT, 1);
94 REG_SET_FIELD(RTC_CNTL_TIMER1_REG, RTC_CNTL_XTL_BUF_WAIT, RTC_CNTL_XTL_BUF_WAIT_DEFAULT);
95 REG_SET_FIELD(RTC_CNTL_TIMER1_REG, RTC_CNTL_CK8M_WAIT, RTC_CNTL_CK8M_WAIT_DEFAULT);
97 REG_SET_FIELD(RTC_CNTL_TIMER3_REG, RTC_CNTL_ROM_RAM_POWERUP_TIMER, ROM_RAM_POWERUP_DELAY);
98 REG_SET_FIELD(RTC_CNTL_TIMER3_REG, RTC_CNTL_ROM_RAM_WAIT_TIMER, ROM_RAM_WAIT_DELAY);
100 REG_SET_FIELD(RTC_CNTL_TIMER3_REG, RTC_CNTL_WIFI_POWERUP_TIMER, WIFI_POWERUP_DELAY);
101 REG_SET_FIELD(RTC_CNTL_TIMER3_REG, RTC_CNTL_WIFI_WAIT_TIMER, WIFI_WAIT_DELAY);
103 REG_SET_FIELD(RTC_CNTL_TIMER4_REG, RTC_CNTL_POWERUP_TIMER, RTC_POWERUP_DELAY);
104 REG_SET_FIELD(RTC_CNTL_TIMER4_REG, RTC_CNTL_WAIT_TIMER, RTC_WAIT_DELAY);
105 //set digital wrap timer
106 REG_SET_FIELD(RTC_CNTL_TIMER4_REG, RTC_CNTL_DG_WRAP_POWERUP_TIMER, DG_WRAP_POWERUP_DELAY);
107 REG_SET_FIELD(RTC_CNTL_TIMER4_REG, RTC_CNTL_DG_WRAP_WAIT_TIMER, DG_WRAP_WAIT_DELAY);
108 //set rtc memory timer
109 REG_SET_FIELD(RTC_CNTL_TIMER5_REG, RTC_CNTL_RTCMEM_POWERUP_TIMER, RTC_MEM_POWERUP_DELAY);
110 REG_SET_FIELD(RTC_CNTL_TIMER5_REG, RTC_CNTL_RTCMEM_WAIT_TIMER, RTC_MEM_WAIT_DELAY);
112 if (cfg.lslp_mem_inf_fpu) {
113 SET_PERI_REG_MASK(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_LSLP_MEM_FORCE_PU);
115 CLEAR_PERI_REG_MASK(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_LSLP_MEM_FORCE_PU);
118 rtc_sleep_pd_config_t pd_cfg = RTC_SLEEP_PD_CONFIG_ALL(cfg.lslp_meminf_pd);
119 rtc_sleep_pd(pd_cfg);
121 if (cfg.rtc_mem_inf_fpu) {
122 SET_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_MEM_FORCE_PU);
124 CLEAR_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_MEM_FORCE_PU);
127 if (cfg.rtc_mem_inf_follow_cpu) {
128 SET_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_MEM_FOLW_CPU);
130 CLEAR_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_MEM_FOLW_CPU);
133 if (cfg.rtc_fastmem_pd_en) {
134 SET_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_FASTMEM_PD_EN);
135 CLEAR_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_FASTMEM_FORCE_PU);
136 CLEAR_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_FASTMEM_FORCE_NOISO);
138 CLEAR_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_FASTMEM_PD_EN);
139 SET_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_FASTMEM_FORCE_PU);
140 SET_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_FASTMEM_FORCE_NOISO);
143 if (cfg.rtc_slowmem_pd_en) {
144 SET_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_SLOWMEM_PD_EN);
145 CLEAR_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_SLOWMEM_FORCE_PU);
146 CLEAR_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_SLOWMEM_FORCE_NOISO);
148 CLEAR_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_SLOWMEM_PD_EN);
149 SET_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_SLOWMEM_FORCE_PU);
150 SET_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_SLOWMEM_FORCE_NOISO);
153 if (cfg.rtc_peri_pd_en) {
154 SET_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_PD_EN);
156 CLEAR_PERI_REG_MASK(RTC_CNTL_PWC_REG, RTC_CNTL_PD_EN);
159 if (cfg.wifi_pd_en) {
160 SET_PERI_REG_MASK(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_WIFI_PD_EN);
162 CLEAR_PERI_REG_MASK(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_WIFI_PD_EN);
165 if (cfg.rom_mem_pd_en) {
166 SET_PERI_REG_MASK(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_CPU_ROM_RAM_PD_EN);
168 CLEAR_PERI_REG_MASK(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_CPU_ROM_RAM_PD_EN);
172 CLEAR_PERI_REG_MASK(RTC_CNTL_DIG_ISO_REG,
173 RTC_CNTL_DG_PAD_FORCE_ISO | RTC_CNTL_DG_PAD_FORCE_NOISO);
174 SET_PERI_REG_MASK(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_DG_WRAP_PD_EN);
175 CLEAR_PERI_REG_MASK(RTC_CNTL_DIG_PWC_REG,
176 RTC_CNTL_DG_WRAP_FORCE_PU | RTC_CNTL_DG_WRAP_FORCE_PD);
177 CLEAR_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_BIAS_FORCE_NOSLEEP);
179 // Shut down parts of RTC which may have been left enabled by the wireless drivers
180 CLEAR_PERI_REG_MASK(RTC_CNTL_ANA_CONF_REG,
181 RTC_CNTL_CKGEN_I2C_PU | RTC_CNTL_PLL_I2C_PU |
182 RTC_CNTL_RFRX_PBUS_PU | RTC_CNTL_TXRF_I2C_PU);
184 CLEAR_PERI_REG_MASK(RTC_CNTL_DIG_PWC_REG, RTC_CNTL_DG_WRAP_PD_EN);
185 REG_SET_FIELD(RTC_CNTL_BIAS_CONF_REG, RTC_CNTL_DBG_ATTEN, 0);
188 REG_SET_FIELD(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_XTL_FORCE_PU, cfg.xtal_fpu);
190 /* enable VDDSDIO control by state machine */
191 REG_CLR_BIT(RTC_CNTL_SDIO_CONF_REG, RTC_CNTL_SDIO_FORCE);
192 REG_SET_FIELD(RTC_CNTL_SDIO_CONF_REG, RTC_CNTL_SDIO_PD_EN, cfg.vddsdio_pd_en);
194 REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DBIAS_SLP, cfg.rtc_dbias_slp);
195 REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DBIAS_WAK, cfg.rtc_dbias_wak);
196 REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DIG_DBIAS_WAK, cfg.dig_dbias_wak);
197 REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DIG_DBIAS_SLP, cfg.dig_dbias_slp);
200 void rtc_sleep_set_wakeup_time(uint64_t t)
202 WRITE_PERI_REG(RTC_CNTL_SLP_TIMER0_REG, t & UINT32_MAX);
203 WRITE_PERI_REG(RTC_CNTL_SLP_TIMER1_REG, t >> 32);
206 uint32_t rtc_sleep_start(uint32_t wakeup_opt, uint32_t reject_opt)
208 REG_SET_FIELD(RTC_CNTL_WAKEUP_STATE_REG, RTC_CNTL_WAKEUP_ENA, wakeup_opt);
209 WRITE_PERI_REG(RTC_CNTL_SLP_REJECT_CONF_REG, reject_opt);
211 /* Start entry into sleep mode */
212 SET_PERI_REG_MASK(RTC_CNTL_STATE0_REG, RTC_CNTL_SLEEP_EN);
214 while (GET_PERI_REG_MASK(RTC_CNTL_INT_RAW_REG,
215 RTC_CNTL_SLP_REJECT_INT_RAW | RTC_CNTL_SLP_WAKEUP_INT_RAW) == 0) {
218 /* In deep sleep mode, we never get here */
219 uint32_t reject = REG_GET_FIELD(RTC_CNTL_INT_RAW_REG, RTC_CNTL_SLP_REJECT_INT_RAW);
220 SET_PERI_REG_MASK(RTC_CNTL_INT_CLR_REG,
221 RTC_CNTL_SLP_REJECT_INT_CLR | RTC_CNTL_SLP_WAKEUP_INT_CLR);