| /* |
| * Copyright (c) 2020 Mohamed ElShahawi. |
| * Copyright (c) 2021 Espressif Systems (Shanghai) Co., Ltd. |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #define DT_DRV_COMPAT espressif_esp32_rtc |
| |
| #define CPU_RESET_REASON RTC_SW_CPU_RESET |
| |
| #if defined(CONFIG_SOC_SERIES_ESP32) |
| #define DT_CPU_COMPAT cdns_tensilica_xtensa_lx6 |
| #undef CPU_RESET_REASON |
| #define CPU_RESET_REASON SW_CPU_RESET |
| #include <zephyr/dt-bindings/clock/esp32_clock.h> |
| #include "esp32/rom/rtc.h" |
| #include "soc/dport_reg.h" |
| #elif defined(CONFIG_SOC_SERIES_ESP32S2) |
| #define DT_CPU_COMPAT cdns_tensilica_xtensa_lx7 |
| #include <zephyr/dt-bindings/clock/esp32s2_clock.h> |
| #include "esp32s2/rom/rtc.h" |
| #include "soc/dport_reg.h" |
| #elif defined(CONFIG_SOC_SERIES_ESP32S3) |
| #define DT_CPU_COMPAT cdns_tensilica_xtensa_lx7 |
| #include <zephyr/dt-bindings/clock/esp32s3_clock.h> |
| #include "esp32s3/rom/rtc.h" |
| #include "soc/dport_reg.h" |
| #include "esp32s3/clk.h" |
| #elif CONFIG_SOC_SERIES_ESP32C3 |
| #define DT_CPU_COMPAT espressif_riscv |
| #include <zephyr/dt-bindings/clock/esp32c3_clock.h> |
| #include "esp32c3/rom/rtc.h" |
| #include <soc/soc_caps.h> |
| #include <soc/soc.h> |
| #include <soc/rtc.h> |
| #endif /* CONFIG_SOC_SERIES_ESP32xx */ |
| |
| #include "esp_rom_sys.h" |
| #include <soc/rtc.h> |
| #include <soc/i2s_reg.h> |
| #include <soc/apb_ctrl_reg.h> |
| #include <soc/timer_group_reg.h> |
| #include <hal/clk_gate_ll.h> |
| #include <soc.h> |
| #include <zephyr/drivers/clock_control.h> |
| #include <driver/periph_ctrl.h> |
| #include <hal/cpu_hal.h> |
| |
| struct esp32_clock_config { |
| int clk_src_sel; |
| uint32_t cpu_freq; |
| uint32_t xtal_freq_sel; |
| int xtal_div; |
| }; |
| |
| static uint8_t const xtal_freq[] = { |
| #if defined(CONFIG_SOC_SERIES_ESP32) || \ |
| defined(CONFIG_SOC_SERIES_ESP32S3) |
| [ESP32_CLK_XTAL_24M] = 24, |
| [ESP32_CLK_XTAL_26M] = 26, |
| [ESP32_CLK_XTAL_40M] = 40, |
| [ESP32_CLK_XTAL_AUTO] = 0 |
| #elif defined(CONFIG_SOC_SERIES_ESP32S2) |
| [ESP32_CLK_XTAL_40M] = 40, |
| #elif defined(CONFIG_SOC_SERIES_ESP32C3) |
| [ESP32_CLK_XTAL_32M] = 32, |
| [ESP32_CLK_XTAL_40M] = 40, |
| #endif |
| }; |
| |
| static int clock_control_esp32_on(const struct device *dev, |
| clock_control_subsys_t sys) |
| { |
| ARG_UNUSED(dev); |
| periph_module_enable((periph_module_t)sys); |
| return 0; |
| } |
| |
| static int clock_control_esp32_off(const struct device *dev, |
| clock_control_subsys_t sys) |
| { |
| ARG_UNUSED(dev); |
| periph_module_disable((periph_module_t)sys); |
| return 0; |
| } |
| |
| static int clock_control_esp32_async_on(const struct device *dev, |
| clock_control_subsys_t sys, |
| clock_control_cb_t cb, |
| void *user_data) |
| { |
| ARG_UNUSED(dev); |
| ARG_UNUSED(sys); |
| ARG_UNUSED(cb); |
| ARG_UNUSED(user_data); |
| return -ENOTSUP; |
| } |
| |
| static enum clock_control_status clock_control_esp32_get_status(const struct device *dev, |
| clock_control_subsys_t sys) |
| { |
| ARG_UNUSED(dev); |
| uint32_t clk_en_reg = periph_ll_get_clk_en_reg((periph_module_t)sys); |
| uint32_t clk_en_mask = periph_ll_get_clk_en_mask((periph_module_t)sys); |
| |
| if (DPORT_GET_PERI_REG_MASK(clk_en_reg, clk_en_mask)) { |
| return CLOCK_CONTROL_STATUS_ON; |
| } |
| return CLOCK_CONTROL_STATUS_OFF; |
| } |
| |
| static int clock_control_esp32_get_rate(const struct device *dev, |
| clock_control_subsys_t sub_system, |
| uint32_t *rate) |
| { |
| ARG_UNUSED(sub_system); |
| |
| rtc_cpu_freq_config_t config; |
| |
| rtc_clk_cpu_freq_get_config(&config); |
| |
| *rate = config.freq_mhz; |
| |
| return 0; |
| } |
| |
| #if defined(CONFIG_SOC_SERIES_ESP32) |
| static void esp32_clock_perip_init(void) |
| { |
| uint32_t common_perip_clk; |
| uint32_t hwcrypto_perip_clk; |
| uint32_t wifi_bt_sdio_clk; |
| |
| #if !CONFIG_SMP |
| soc_reset_reason_t rst_reas[1]; |
| #else |
| soc_reset_reason_t rst_reas[2]; |
| #endif |
| |
| rst_reas[0] = esp_rom_get_reset_reason(0); |
| #if CONFIG_SMP |
| rst_reas[1] = esp_rom_get_reset_reason(1); |
| #endif |
| |
| /* For reason that only reset CPU, do not disable the clocks |
| * that have been enabled before reset. |
| */ |
| if ((rst_reas[0] == RESET_REASON_CPU0_MWDT0 || rst_reas[0] == RESET_REASON_CPU0_SW || |
| rst_reas[0] == RESET_REASON_CPU0_RTC_WDT) |
| #if CONFIG_SMP |
| || (rst_reas[1] == RESET_REASON_CPU1_MWDT1 || rst_reas[1] == RESET_REASON_CPU1_SW || |
| rst_reas[1] == RESET_REASON_CPU1_RTC_WDT) |
| #endif |
| ) { |
| common_perip_clk = ~DPORT_READ_PERI_REG(DPORT_PERIP_CLK_EN_REG); |
| hwcrypto_perip_clk = ~DPORT_READ_PERI_REG(DPORT_PERI_CLK_EN_REG); |
| wifi_bt_sdio_clk = ~DPORT_READ_PERI_REG(DPORT_WIFI_CLK_EN_REG); |
| } else { |
| common_perip_clk = DPORT_WDG_CLK_EN | |
| DPORT_PCNT_CLK_EN | |
| DPORT_LEDC_CLK_EN | |
| DPORT_TIMERGROUP1_CLK_EN | |
| DPORT_PWM0_CLK_EN | |
| DPORT_TWAI_CLK_EN | |
| DPORT_PWM1_CLK_EN | |
| DPORT_PWM2_CLK_EN | |
| DPORT_PWM3_CLK_EN; |
| |
| hwcrypto_perip_clk = DPORT_PERI_EN_AES | |
| DPORT_PERI_EN_SHA | |
| DPORT_PERI_EN_RSA | |
| DPORT_PERI_EN_SECUREBOOT; |
| |
| wifi_bt_sdio_clk = DPORT_WIFI_CLK_WIFI_EN | |
| DPORT_WIFI_CLK_BT_EN_M | |
| DPORT_WIFI_CLK_UNUSED_BIT5 | |
| DPORT_WIFI_CLK_UNUSED_BIT12 | |
| DPORT_WIFI_CLK_SDIOSLAVE_EN | |
| DPORT_WIFI_CLK_SDIO_HOST_EN | |
| DPORT_WIFI_CLK_EMAC_EN; |
| } |
| |
| /* Reset peripherals like I2C, SPI, UART, I2S and bring them to known state */ |
| common_perip_clk |= DPORT_I2S0_CLK_EN | |
| DPORT_UART_CLK_EN | |
| DPORT_SPI2_CLK_EN | |
| DPORT_I2C_EXT0_CLK_EN | |
| DPORT_UHCI0_CLK_EN | |
| DPORT_RMT_CLK_EN | |
| DPORT_UHCI1_CLK_EN | |
| DPORT_SPI3_CLK_EN | |
| DPORT_I2C_EXT1_CLK_EN | |
| DPORT_I2S1_CLK_EN | |
| DPORT_SPI_DMA_CLK_EN; |
| |
| common_perip_clk &= ~DPORT_SPI01_CLK_EN; |
| common_perip_clk &= ~DPORT_SPI2_CLK_EN; |
| common_perip_clk &= ~DPORT_SPI3_CLK_EN; |
| |
| /* Change I2S clock to audio PLL first. Because if I2S uses 160MHz clock, |
| * the current is not reduced when disable I2S clock. |
| */ |
| DPORT_SET_PERI_REG_MASK(I2S_CLKM_CONF_REG(0), I2S_CLKA_ENA); |
| DPORT_SET_PERI_REG_MASK(I2S_CLKM_CONF_REG(1), I2S_CLKA_ENA); |
| |
| /* Disable some peripheral clocks. */ |
| DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, common_perip_clk); |
| DPORT_SET_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, common_perip_clk); |
| |
| /* Disable hardware crypto clocks. */ |
| DPORT_CLEAR_PERI_REG_MASK(DPORT_PERI_CLK_EN_REG, hwcrypto_perip_clk); |
| DPORT_SET_PERI_REG_MASK(DPORT_PERI_RST_EN_REG, hwcrypto_perip_clk); |
| |
| /* Disable WiFi/BT/SDIO clocks. */ |
| DPORT_CLEAR_PERI_REG_MASK(DPORT_WIFI_CLK_EN_REG, wifi_bt_sdio_clk); |
| |
| /* Enable RNG clock. */ |
| periph_module_enable(PERIPH_RNG_MODULE); |
| } |
| #endif /* CONFIG_SOC_SERIES_ESP32 */ |
| |
| #if defined(CONFIG_SOC_SERIES_ESP32S2) |
| static void esp32_clock_perip_init(void) |
| { |
| uint32_t common_perip_clk; |
| uint32_t hwcrypto_perip_clk; |
| uint32_t wifi_bt_sdio_clk; |
| uint32_t common_perip_clk1; |
| |
| soc_reset_reason_t rst_reason = esp_rom_get_reset_reason(0); |
| |
| /* For reason that only reset CPU, do not disable the clocks |
| * that have been enabled before reset. |
| */ |
| if (rst_reason == RESET_REASON_CPU0_MWDT0 || rst_reason == RESET_REASON_CPU0_SW || |
| rst_reason == RESET_REASON_CPU0_RTC_WDT || rst_reason == RESET_REASON_CPU0_MWDT1) { |
| common_perip_clk = ~DPORT_READ_PERI_REG(DPORT_PERIP_CLK_EN_REG); |
| hwcrypto_perip_clk = ~DPORT_READ_PERI_REG(DPORT_PERIP_CLK_EN1_REG); |
| wifi_bt_sdio_clk = ~DPORT_READ_PERI_REG(DPORT_WIFI_CLK_EN_REG); |
| } else { |
| common_perip_clk = DPORT_WDG_CLK_EN | |
| DPORT_I2S0_CLK_EN | |
| DPORT_UART1_CLK_EN | |
| DPORT_SPI2_CLK_EN | |
| DPORT_I2C_EXT0_CLK_EN | |
| DPORT_UHCI0_CLK_EN | |
| DPORT_RMT_CLK_EN | |
| DPORT_PCNT_CLK_EN | |
| DPORT_LEDC_CLK_EN | |
| DPORT_TIMERGROUP1_CLK_EN | |
| DPORT_SPI3_CLK_EN | |
| DPORT_PWM0_CLK_EN | |
| DPORT_TWAI_CLK_EN | |
| DPORT_PWM1_CLK_EN | |
| DPORT_I2S1_CLK_EN | |
| DPORT_SPI2_DMA_CLK_EN | |
| DPORT_SPI3_DMA_CLK_EN | |
| DPORT_PWM2_CLK_EN | |
| DPORT_PWM3_CLK_EN; |
| |
| common_perip_clk1 = 0; |
| |
| hwcrypto_perip_clk = DPORT_CRYPTO_AES_CLK_EN | |
| DPORT_CRYPTO_SHA_CLK_EN | |
| DPORT_CRYPTO_RSA_CLK_EN; |
| |
| wifi_bt_sdio_clk = DPORT_WIFI_CLK_WIFI_EN | |
| DPORT_WIFI_CLK_BT_EN_M | |
| DPORT_WIFI_CLK_UNUSED_BIT5 | |
| DPORT_WIFI_CLK_UNUSED_BIT12 | |
| DPORT_WIFI_CLK_SDIOSLAVE_EN | |
| DPORT_WIFI_CLK_SDIO_HOST_EN | |
| DPORT_WIFI_CLK_EMAC_EN; |
| } |
| |
| /* Reset peripherals like I2C, SPI, UART, I2S and bring them to known state */ |
| common_perip_clk |= DPORT_I2S0_CLK_EN | |
| DPORT_UART1_CLK_EN | |
| DPORT_USB_CLK_EN | |
| DPORT_SPI2_CLK_EN | |
| DPORT_I2C_EXT0_CLK_EN | |
| DPORT_UHCI0_CLK_EN | |
| DPORT_RMT_CLK_EN | |
| DPORT_UHCI1_CLK_EN | |
| DPORT_SPI3_CLK_EN | |
| DPORT_I2C_EXT1_CLK_EN | |
| DPORT_I2S1_CLK_EN | |
| DPORT_SPI2_DMA_CLK_EN | |
| DPORT_SPI3_DMA_CLK_EN; |
| |
| common_perip_clk1 = 0; |
| |
| /* Change I2S clock to audio PLL first. Because if I2S uses 160MHz clock, |
| * the current is not reduced when disable I2S clock. |
| */ |
| REG_SET_FIELD(I2S_CLKM_CONF_REG(0), I2S_CLK_SEL, I2S_CLK_AUDIO_PLL); |
| REG_SET_FIELD(I2S_CLKM_CONF_REG(1), I2S_CLK_SEL, I2S_CLK_AUDIO_PLL); |
| |
| /* Disable some peripheral clocks. */ |
| DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, common_perip_clk); |
| DPORT_SET_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, common_perip_clk); |
| |
| DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_CLK_EN1_REG, common_perip_clk1); |
| DPORT_SET_PERI_REG_MASK(DPORT_PERIP_RST_EN1_REG, common_perip_clk1); |
| |
| /* Disable hardware crypto clocks. */ |
| DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_CLK_EN1_REG, hwcrypto_perip_clk); |
| DPORT_SET_PERI_REG_MASK(DPORT_PERIP_RST_EN1_REG, hwcrypto_perip_clk); |
| |
| /* Disable WiFi/BT/SDIO clocks. */ |
| DPORT_CLEAR_PERI_REG_MASK(DPORT_WIFI_CLK_EN_REG, wifi_bt_sdio_clk); |
| |
| /* Enable WiFi MAC and POWER clocks */ |
| DPORT_SET_PERI_REG_MASK(DPORT_WIFI_CLK_EN_REG, DPORT_WIFI_CLK_WIFI_EN); |
| |
| /* Set WiFi light sleep clock source to RTC slow clock */ |
| DPORT_REG_SET_FIELD(DPORT_BT_LPCK_DIV_INT_REG, DPORT_BT_LPCK_DIV_NUM, 0); |
| DPORT_CLEAR_PERI_REG_MASK(DPORT_BT_LPCK_DIV_FRAC_REG, DPORT_LPCLK_SEL_8M); |
| DPORT_SET_PERI_REG_MASK(DPORT_BT_LPCK_DIV_FRAC_REG, DPORT_LPCLK_SEL_RTC_SLOW); |
| |
| /* Enable RNG clock. */ |
| periph_module_enable(PERIPH_RNG_MODULE); |
| } |
| #endif /* CONFIG_SOC_SERIES_ESP32S2 */ |
| |
| #if defined(CONFIG_SOC_SERIES_ESP32S3) |
| static void esp32_clock_perip_init(void) |
| { |
| #if defined(CONFIG_SOC_ESP32S3_APPCPU) |
| /* skip APPCPU configuration */ |
| return; |
| #endif |
| |
| uint32_t common_perip_clk, hwcrypto_perip_clk, wifi_bt_sdio_clk = 0; |
| uint32_t common_perip_clk1 = 0; |
| |
| soc_reset_reason_t rst_reason = esp_rom_get_reset_reason(0); |
| |
| /* For reason that only reset CPU, do not disable the clocks |
| * that have been enabled before reset. |
| */ |
| if (rst_reason == RESET_REASON_CPU0_MWDT0 || rst_reason == RESET_REASON_CPU0_SW || |
| rst_reason == RESET_REASON_CPU0_RTC_WDT || rst_reason == RESET_REASON_CPU0_MWDT1) { |
| common_perip_clk = ~READ_PERI_REG(SYSTEM_PERIP_CLK_EN0_REG); |
| hwcrypto_perip_clk = ~READ_PERI_REG(SYSTEM_PERIP_CLK_EN1_REG); |
| wifi_bt_sdio_clk = ~READ_PERI_REG(SYSTEM_WIFI_CLK_EN_REG); |
| } else { |
| common_perip_clk = SYSTEM_WDG_CLK_EN | |
| SYSTEM_I2S0_CLK_EN | |
| SYSTEM_UART1_CLK_EN | |
| SYSTEM_UART2_CLK_EN | |
| SYSTEM_USB_CLK_EN | |
| SYSTEM_SPI2_CLK_EN | |
| SYSTEM_I2C_EXT0_CLK_EN | |
| SYSTEM_UHCI0_CLK_EN | |
| SYSTEM_RMT_CLK_EN | |
| SYSTEM_PCNT_CLK_EN | |
| SYSTEM_LEDC_CLK_EN | |
| SYSTEM_TIMERGROUP1_CLK_EN | |
| SYSTEM_SPI3_CLK_EN | |
| SYSTEM_SPI4_CLK_EN | |
| SYSTEM_PWM0_CLK_EN | |
| SYSTEM_TWAI_CLK_EN | |
| SYSTEM_PWM1_CLK_EN | |
| SYSTEM_I2S1_CLK_EN | |
| SYSTEM_SPI2_DMA_CLK_EN | |
| SYSTEM_SPI3_DMA_CLK_EN | |
| SYSTEM_PWM2_CLK_EN | |
| SYSTEM_PWM3_CLK_EN; |
| |
| common_perip_clk1 = 0; |
| |
| hwcrypto_perip_clk = SYSTEM_CRYPTO_AES_CLK_EN | |
| SYSTEM_CRYPTO_SHA_CLK_EN | |
| SYSTEM_CRYPTO_RSA_CLK_EN; |
| |
| wifi_bt_sdio_clk = SYSTEM_WIFI_CLK_WIFI_EN | |
| SYSTEM_WIFI_CLK_BT_EN_M | |
| SYSTEM_WIFI_CLK_UNUSED_BIT5 | |
| SYSTEM_WIFI_CLK_UNUSED_BIT12 | |
| SYSTEM_WIFI_CLK_SDIO_HOST_EN; |
| } |
| |
| /* Reset peripherals like I2C, SPI, UART, I2S and bring them to known state */ |
| common_perip_clk |= SYSTEM_I2S0_CLK_EN | |
| SYSTEM_UART1_CLK_EN | |
| SYSTEM_UART2_CLK_EN | |
| SYSTEM_USB_CLK_EN | |
| SYSTEM_SPI2_CLK_EN | |
| SYSTEM_I2C_EXT0_CLK_EN | |
| SYSTEM_UHCI0_CLK_EN | |
| SYSTEM_RMT_CLK_EN | |
| SYSTEM_UHCI1_CLK_EN | |
| SYSTEM_SPI3_CLK_EN | |
| SYSTEM_SPI4_CLK_EN | |
| SYSTEM_I2C_EXT1_CLK_EN | |
| SYSTEM_I2S1_CLK_EN | |
| SYSTEM_SPI2_DMA_CLK_EN | |
| SYSTEM_SPI3_DMA_CLK_EN; |
| |
| common_perip_clk1 = 0; |
| |
| /* Disable some peripheral clocks. */ |
| CLEAR_PERI_REG_MASK(SYSTEM_PERIP_CLK_EN0_REG, common_perip_clk); |
| SET_PERI_REG_MASK(SYSTEM_PERIP_RST_EN0_REG, common_perip_clk); |
| |
| CLEAR_PERI_REG_MASK(SYSTEM_PERIP_CLK_EN1_REG, common_perip_clk1); |
| SET_PERI_REG_MASK(SYSTEM_PERIP_RST_EN1_REG, common_perip_clk1); |
| |
| /* Disable hardware crypto clocks. */ |
| CLEAR_PERI_REG_MASK(SYSTEM_PERIP_CLK_EN1_REG, hwcrypto_perip_clk); |
| SET_PERI_REG_MASK(SYSTEM_PERIP_RST_EN1_REG, hwcrypto_perip_clk); |
| |
| /* Disable WiFi/BT/SDIO clocks. */ |
| CLEAR_PERI_REG_MASK(SYSTEM_WIFI_CLK_EN_REG, wifi_bt_sdio_clk); |
| SET_PERI_REG_MASK(SYSTEM_WIFI_CLK_EN_REG, SYSTEM_WIFI_CLK_EN); |
| |
| /* Set WiFi light sleep clock source to RTC slow clock */ |
| REG_SET_FIELD(SYSTEM_BT_LPCK_DIV_INT_REG, SYSTEM_BT_LPCK_DIV_NUM, 0); |
| CLEAR_PERI_REG_MASK(SYSTEM_BT_LPCK_DIV_FRAC_REG, SYSTEM_LPCLK_SEL_8M); |
| SET_PERI_REG_MASK(SYSTEM_BT_LPCK_DIV_FRAC_REG, SYSTEM_LPCLK_SEL_RTC_SLOW); |
| |
| /* Enable RNG clock. */ |
| periph_module_enable(PERIPH_RNG_MODULE); |
| |
| esp_rom_uart_tx_wait_idle(0); |
| esp_rom_uart_set_clock_baudrate(0, UART_CLK_FREQ_ROM, 115200); |
| } |
| #endif /* CONFIG_SOC_SERIES_ESP32S3 */ |
| |
| #if defined(CONFIG_SOC_SERIES_ESP32C3) |
| static void esp32_clock_perip_init(void) |
| { |
| uint32_t common_perip_clk; |
| uint32_t hwcrypto_perip_clk; |
| uint32_t wifi_bt_sdio_clk; |
| uint32_t common_perip_clk1; |
| |
| soc_reset_reason_t rst_reason = esp_rom_get_reset_reason(0); |
| |
| /* For reason that only reset CPU, do not disable the clocks |
| * that have been enabled before reset. |
| */ |
| if (rst_reason == RESET_REASON_CPU0_MWDT0 || rst_reason == RESET_REASON_CPU0_SW || |
| rst_reason == RESET_REASON_CPU0_RTC_WDT || rst_reason == RESET_REASON_CPU0_MWDT1) { |
| common_perip_clk = ~READ_PERI_REG(SYSTEM_PERIP_CLK_EN0_REG); |
| hwcrypto_perip_clk = ~READ_PERI_REG(SYSTEM_PERIP_CLK_EN1_REG); |
| wifi_bt_sdio_clk = ~READ_PERI_REG(SYSTEM_WIFI_CLK_EN_REG); |
| } else { |
| common_perip_clk = SYSTEM_WDG_CLK_EN | |
| SYSTEM_I2S0_CLK_EN | |
| SYSTEM_UART1_CLK_EN | |
| SYSTEM_SPI2_CLK_EN | |
| SYSTEM_I2C_EXT0_CLK_EN | |
| SYSTEM_UHCI0_CLK_EN | |
| SYSTEM_RMT_CLK_EN | |
| SYSTEM_LEDC_CLK_EN | |
| SYSTEM_TIMERGROUP1_CLK_EN | |
| SYSTEM_SPI3_CLK_EN | |
| SYSTEM_SPI4_CLK_EN | |
| SYSTEM_TWAI_CLK_EN | |
| SYSTEM_I2S1_CLK_EN | |
| SYSTEM_SPI2_DMA_CLK_EN | |
| SYSTEM_SPI3_DMA_CLK_EN; |
| |
| common_perip_clk1 = 0; |
| |
| hwcrypto_perip_clk = SYSTEM_CRYPTO_AES_CLK_EN | |
| SYSTEM_CRYPTO_SHA_CLK_EN | |
| SYSTEM_CRYPTO_RSA_CLK_EN; |
| |
| wifi_bt_sdio_clk = SYSTEM_WIFI_CLK_WIFI_EN | |
| SYSTEM_WIFI_CLK_BT_EN_M | |
| SYSTEM_WIFI_CLK_UNUSED_BIT5 | |
| SYSTEM_WIFI_CLK_UNUSED_BIT12; |
| } |
| |
| /* Reset peripherals like I2C, SPI, UART, I2S and bring them to known state */ |
| common_perip_clk |= SYSTEM_I2S0_CLK_EN | |
| SYSTEM_UART1_CLK_EN | |
| SYSTEM_SPI2_CLK_EN | |
| SYSTEM_I2C_EXT0_CLK_EN | |
| SYSTEM_UHCI0_CLK_EN | |
| SYSTEM_RMT_CLK_EN | |
| SYSTEM_UHCI1_CLK_EN | |
| SYSTEM_SPI3_CLK_EN | |
| SYSTEM_SPI4_CLK_EN | |
| SYSTEM_I2C_EXT1_CLK_EN | |
| SYSTEM_I2S1_CLK_EN | |
| SYSTEM_SPI2_DMA_CLK_EN | |
| SYSTEM_SPI3_DMA_CLK_EN; |
| |
| common_perip_clk1 = 0; |
| |
| /* Disable some peripheral clocks. */ |
| CLEAR_PERI_REG_MASK(SYSTEM_PERIP_CLK_EN0_REG, common_perip_clk); |
| SET_PERI_REG_MASK(SYSTEM_PERIP_RST_EN0_REG, common_perip_clk); |
| |
| CLEAR_PERI_REG_MASK(SYSTEM_PERIP_CLK_EN1_REG, common_perip_clk1); |
| SET_PERI_REG_MASK(SYSTEM_PERIP_RST_EN1_REG, common_perip_clk1); |
| |
| /* Disable hardware crypto clocks. */ |
| CLEAR_PERI_REG_MASK(SYSTEM_PERIP_CLK_EN1_REG, hwcrypto_perip_clk); |
| SET_PERI_REG_MASK(SYSTEM_PERIP_RST_EN1_REG, hwcrypto_perip_clk); |
| |
| /* Disable WiFi/BT/SDIO clocks. */ |
| CLEAR_PERI_REG_MASK(SYSTEM_WIFI_CLK_EN_REG, wifi_bt_sdio_clk); |
| SET_PERI_REG_MASK(SYSTEM_WIFI_CLK_EN_REG, SYSTEM_WIFI_CLK_EN); |
| |
| /* Set WiFi light sleep clock source to RTC slow clock */ |
| REG_SET_FIELD(SYSTEM_BT_LPCK_DIV_INT_REG, SYSTEM_BT_LPCK_DIV_NUM, 0); |
| CLEAR_PERI_REG_MASK(SYSTEM_BT_LPCK_DIV_FRAC_REG, SYSTEM_LPCLK_SEL_8M); |
| SET_PERI_REG_MASK(SYSTEM_BT_LPCK_DIV_FRAC_REG, SYSTEM_LPCLK_SEL_RTC_SLOW); |
| |
| /* Enable RNG clock. */ |
| periph_module_enable(PERIPH_RNG_MODULE); |
| } |
| #endif /* CONFIG_SOC_SERIES_ESP32C3 */ |
| |
| static int clock_control_esp32_init(const struct device *dev) |
| { |
| const struct esp32_clock_config *cfg = dev->config; |
| rtc_cpu_freq_config_t old_config; |
| rtc_cpu_freq_config_t new_config; |
| bool res; |
| |
| /* reset default config to use dts config */ |
| if (rtc_clk_apb_freq_get() < APB_CLK_FREQ || rtc_get_reset_reason(0) != CPU_RESET_REASON) { |
| rtc_clk_config_t clk_cfg = RTC_CLK_CONFIG_DEFAULT(); |
| |
| clk_cfg.xtal_freq = xtal_freq[cfg->xtal_freq_sel]; |
| clk_cfg.cpu_freq_mhz = cfg->cpu_freq; |
| clk_cfg.slow_freq = rtc_clk_slow_freq_get(); |
| clk_cfg.fast_freq = rtc_clk_fast_freq_get(); |
| rtc_clk_init(clk_cfg); |
| } |
| |
| rtc_clk_fast_freq_set(RTC_FAST_FREQ_8M); |
| |
| rtc_clk_cpu_freq_get_config(&old_config); |
| |
| const uint32_t old_freq_mhz = old_config.freq_mhz; |
| const uint32_t new_freq_mhz = cfg->cpu_freq; |
| |
| res = rtc_clk_cpu_freq_mhz_to_config(cfg->cpu_freq, &new_config); |
| if (!res) { |
| return -ENOTSUP; |
| } |
| |
| /* wait uart output to be cleared */ |
| esp_rom_uart_tx_wait_idle(0); |
| |
| if (cfg->xtal_div >= 0) { |
| new_config.div = cfg->xtal_div; |
| } |
| |
| if (cfg->clk_src_sel >= 0) { |
| new_config.source = cfg->clk_src_sel; |
| } |
| |
| /* set new configuration */ |
| rtc_clk_cpu_freq_set_config(&new_config); |
| |
| /* Re-calculate the ccount to make time calculation correct */ |
| cpu_hal_set_cycle_count((uint64_t)cpu_hal_get_cycle_count() * new_freq_mhz / old_freq_mhz); |
| |
| esp32_clock_perip_init(); |
| |
| return 0; |
| } |
| |
| static const struct clock_control_driver_api clock_control_esp32_api = { |
| .on = clock_control_esp32_on, |
| .off = clock_control_esp32_off, |
| .async_on = clock_control_esp32_async_on, |
| .get_rate = clock_control_esp32_get_rate, |
| .get_status = clock_control_esp32_get_status, |
| }; |
| |
| #define ESP32_CLOCK_SOURCE \ |
| COND_CODE_1(DT_NODE_HAS_PROP(DT_INST(0, DT_CPU_COMPAT), clock_source), \ |
| (DT_PROP(DT_INST(0, DT_CPU_COMPAT), clock_source)), (-1)) |
| |
| #define ESP32_CLOCK_XTAL_DIV \ |
| COND_CODE_1(DT_NODE_HAS_PROP(0, xtal_div), \ |
| (DT_INST_PROP(0, xtal_div)), (-1)) |
| |
| static const struct esp32_clock_config esp32_clock_config0 = { |
| .clk_src_sel = ESP32_CLOCK_SOURCE, |
| .cpu_freq = DT_PROP(DT_INST(0, DT_CPU_COMPAT), clock_frequency) / 1000000, |
| .xtal_freq_sel = DT_INST_PROP(0, xtal_freq), |
| .xtal_div = ESP32_CLOCK_XTAL_DIV |
| }; |
| |
| DEVICE_DT_DEFINE(DT_NODELABEL(rtc), |
| &clock_control_esp32_init, |
| NULL, |
| NULL, |
| &esp32_clock_config0, |
| PRE_KERNEL_1, |
| CONFIG_CLOCK_CONTROL_INIT_PRIORITY, |
| &clock_control_esp32_api); |
