/* * Copyright (c) 2016 Open-RnD Sp. z o.o. * Copyright (c) 2017 RnDity Sp. z o.o. * Copyright (c) 2019 Linaro Limited * * SPDX-License-Identifier: Apache-2.0 */ /** * @brief Driver for External interrupt/event controller in STM32 MCUs * * Driver is currently implemented to support following EXTI lines * STM32F1/STM32F3: Lines 0 to 15. Lines > 15 not supported * STM32F0/STM32L0/STM32L4: Lines 0 to 15. Lines > 15 are not mapped on an IRQ * STM32F2/STM32F4: Lines 0 to 15, 16, 17 18, 21 and 22. Others not supported * STM32F7: Lines 0 to 15, 16, 17 18, 21, 22 and 23. Others not supported * */ #include #include #include #include "exti_stm32.h" #if defined(CONFIG_SOC_SERIES_STM32F0X) #define EXTI_LINES 32 #elif defined(CONFIG_SOC_SERIES_STM32F1X) #define EXTI_LINES 19 #elif defined(CONFIG_SOC_SERIES_STM32F2X) #define EXTI_LINES 23 #elif defined(CONFIG_SOC_STM32F302X8) #define EXTI_LINES 36 #elif defined(CONFIG_SOC_STM32F303XC) #define EXTI_LINES 36 #elif defined(CONFIG_SOC_STM32F334X8) #define EXTI_LINES 36 #elif defined(CONFIG_SOC_STM32F373XC) #define EXTI_LINES 29 #elif defined(CONFIG_SOC_SERIES_STM32F4X) #define EXTI_LINES 23 #elif defined(CONFIG_SOC_SERIES_STM32F7X) #define EXTI_LINES 24 #elif defined(CONFIG_SOC_SERIES_STM32L0X) #define EXTI_LINES 30 #elif defined(CONFIG_SOC_SERIES_STM32L1X) #define EXTI_LINES 24 #elif defined(CONFIG_SOC_SERIES_STM32L4X) #define EXTI_LINES 40 #elif defined(CONFIG_SOC_SERIES_STM32MP1X) #define EXTI_LINES 76 #elif defined(CONFIG_SOC_SERIES_STM32WBX) #define EXTI_LINES 49 #endif #if defined(CONFIG_SOC_SERIES_STM32MP1X) IRQn_Type exti_irq_table[] = { EXTI0_IRQn, EXTI1_IRQn, EXTI2_IRQn, EXTI3_IRQn, EXTI4_IRQn, EXTI5_IRQn, EXTI6_IRQn, EXTI7_IRQn, EXTI8_IRQn, EXTI9_IRQn, EXTI10_IRQn, EXTI11_IRQn, EXTI12_IRQn, EXTI13_IRQn, EXTI14_IRQn, EXTI15_IRQn, PVD_AVD_IRQn, RTC_TIMESTAMP_IRQn, TAMP_IRQn, RTC_WKUP_ALARM_IRQn, 0xFF, I2C1_EV_IRQn, I2C2_EV_IRQn, I2C3_EV_IRQn, I2C3_EV_IRQn, I2C5_EV_IRQn, USART1_IRQn, USART2_IRQn, USART3_IRQn, USART6_IRQn, UART4_IRQn, UART5_IRQn, UART7_IRQn, UART8_IRQn, 0xFF, 0xFF, SPI1_IRQn, SPI2_IRQn, SPI3_IRQn, SPI4_IRQn, SPI5_IRQn, SPI6_IRQn, MDIOS_IRQn, USBH_OHCI_IRQn, OTG_IRQn, 0xFF, 0xFF, LPTIM1_IRQn, LPTIM2_IRQn, 0xFF, LPTIM3_IRQn, 0xFF, LPTIM4_IRQn, LPTIM5_IRQn, I2C6_EV_IRQn, WAKEUP_PIN_IRQn, WAKEUP_PIN_IRQn, WAKEUP_PIN_IRQn, WAKEUP_PIN_IRQn, WAKEUP_PIN_IRQn, WAKEUP_PIN_IRQn, IPCC_RX0_IRQn, IPCC_RX1_IRQn, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, CEC_IRQn, ETH1_WKUP_IRQn, 0xFF, DTS_IRQn }; #endif /* wrapper for user callback */ struct __exti_cb { stm32_exti_callback_t cb; void *data; }; /* driver data */ struct stm32_exti_data { /* per-line callbacks */ struct __exti_cb cb[EXTI_LINES]; }; int stm32_exti_enable(int line) { int irqnum = 0; if (line < 32) { LL_EXTI_EnableIT_0_31(1 << line); } else if (line < 64) { #if EXTI_LINES > 32 LL_EXTI_EnableIT_32_63(1 << (line - 32)); #else __ASSERT_NO_MSG(line); #endif } else { #if EXTI_LINES > 64 LL_EXTI_EnableIT_64_95(1 << (line - 32)); #else __ASSERT_NO_MSG(line); #endif } #if defined(CONFIG_SOC_SERIES_STM32F0X) || \ defined(CONFIG_SOC_SERIES_STM32L0X) if (line >= 4 && line <= 15) { irqnum = EXTI4_15_IRQn; } else if (line >= 2 && line <= 3) { irqnum = EXTI2_3_IRQn; } else if (line >= 0 && line <= 1) { irqnum = EXTI0_1_IRQn; } else { /* > 15 are not mapped on an IRQ */ /* * On STM32F0X, this function also support enabling EXTI * lines that are not connected to an IRQ. This might be used * by other drivers or boards, to allow the device wakeup on * some non-GPIO signals. */ return 0; } #elif defined(CONFIG_SOC_SERIES_STM32F1X) || \ defined(CONFIG_SOC_SERIES_STM32F2X) || \ defined(CONFIG_SOC_SERIES_STM32F3X) || \ defined(CONFIG_SOC_SERIES_STM32F4X) || \ defined(CONFIG_SOC_SERIES_STM32F7X) || \ defined(CONFIG_SOC_SERIES_STM32L1X) || \ defined(CONFIG_SOC_SERIES_STM32L4X) || \ defined(CONFIG_SOC_SERIES_STM32WBX) if (line >= 5 && line <= 9) { irqnum = EXTI9_5_IRQn; } else if (line >= 10 && line <= 15) { irqnum = EXTI15_10_IRQn; } else if (line >= 0 && line <= 4) { /* pins 0..4 are mapped to EXTI0.. EXTI4 */ irqnum = EXTI0_IRQn + line; } else { switch (line) { #if defined(CONFIG_SOC_SERIES_STM32F2X) || \ defined(CONFIG_SOC_SERIES_STM32F4X) || \ defined(CONFIG_SOC_SERIES_STM32F7X) case 16: irqnum = PVD_IRQn; break; case 18: irqnum = OTG_FS_WKUP_IRQn; break; case 21: irqnum = TAMP_STAMP_IRQn; break; case 22: irqnum = RTC_WKUP_IRQn; break; #endif #if defined(CONFIG_SOC_SERIES_STM32F7X) case 23: irqnum = LPTIM1_IRQn; break; #endif default: /* No IRQ associated to this line */ #if defined(CONFIG_SOC_SERIES_STM32L4X) || \ defined(CONFIG_SOC_SERIES_STM32WBX) /* > 15 are not mapped on an IRQ */ /* * On specified soc, this function also support enabling EXTI * lines that are not connected to an IRQ. This might be used * by other drivers or boards, to allow the device wakeup on * some non-GPIO signals. */ return 0; #else return -ENOTSUP; #endif /* CONFIG_SOC_SERIES_STM32L4X */ } } #elif defined(CONFIG_SOC_SERIES_STM32MP1X) if (line <= 72) { irqnum = exti_irq_table[line]; if (irqnum == 0xFF) return 0; } else { return -ENOTSUP; } #else #error "Unknown STM32 SoC" #endif irq_enable(irqnum); return 0; } void stm32_exti_disable(int line) { if (line < 32) { LL_EXTI_DisableIT_0_31(1 << line); } else if (line < 64) { #if EXTI_LINES > 32 LL_EXTI_DisableIT_32_63(1 << (line - 32)); #else __ASSERT_NO_MSG(line); #endif } else { #if EXTI_LINES > 64 LL_EXTI_DisableIT_64_95(1 << (line - 64)); #else __ASSERT_NO_MSG(line); #endif } } /** * @brief check if interrupt is pending * * @param line line number */ static inline int stm32_exti_is_pending(int line) { if (line < 32) { #if defined(CONFIG_SOC_SERIES_STM32MP1X) return (LL_EXTI_IsActiveRisingFlag_0_31(1 << line) || LL_EXTI_IsActiveFallingFlag_0_31(1 << line)); #else return LL_EXTI_IsActiveFlag_0_31(1 << line); #endif } else if (line < 64) { #if EXTI_LINES > 32 #if defined(CONFIG_SOC_SERIES_STM32MP1X) __ASSERT_NO_MSG(line); return 0; #else return LL_EXTI_IsActiveFlag_32_63(1 << (line - 32)); #endif #else __ASSERT_NO_MSG(line); return 0; #endif } else { #if EXTI_LINES > 64 #if defined(CONFIG_SOC_SERIES_STM32MP1X) return (LL_EXTI_IsActiveRisingFlag_64_95(1 << (line - 64)) || LL_EXTI_IsActiveFallingFlag_64_95(1 << (line - 64))); #else return LL_EXTI_IsActiveFlag_64_96(1 << (line - 64)); #endif #else __ASSERT_NO_MSG(line); return 0; #endif } } /** * @brief clear pending interrupt bit * * @param line line number */ static inline void stm32_exti_clear_pending(int line) { if (line < 32) { #if defined(CONFIG_SOC_SERIES_STM32MP1X) LL_EXTI_ClearRisingFlag_0_31(1 << line); LL_EXTI_ClearFallingFlag_0_31(1 << line); #else LL_EXTI_ClearFlag_0_31(1 << line); #endif } else if (line < 64) { #if EXTI_LINES > 32 #if !defined(CONFIG_SOC_SERIES_STM32MP1X) LL_EXTI_ClearFlag_32_63(1 << (line - 32)); #endif #else __ASSERT_NO_MSG(line); #endif } else { #if EXTI_LINES > 64 #if defined(CONFIG_SOC_SERIES_STM32MP1X) LL_EXTI_ClearRisingFlag_64_95(1 << (line - 64)); LL_EXTI_ClearFallingFlag_64_95(1 << (line - 64)); #else __ASSERT_NO_MSG(line); #endif #else __ASSERT_NO_MSG(line); #endif } } void stm32_exti_trigger(int line, int trigger) { if (trigger & STM32_EXTI_TRIG_RISING) { if (line < 32) { LL_EXTI_EnableRisingTrig_0_31(1 << line); } else if (line < 64) { #if EXTI_LINES > 32 #if defined(CONFIG_SOC_SERIES_STM32MP1X) __ASSERT_NO_MSG(line); #else LL_EXTI_EnableRisingTrig_32_63(1 << (line - 32)); #endif #else __ASSERT_NO_MSG(line); #endif } else { #if EXTI_LINES > 64 #if !defined(CONFIG_SOC_SERIES_STM32MP1X) __ASSERT_NO_MSG(line); #else LL_EXTI_EnableRisingTrig_64_95(1 << (line - 64)); #endif #endif } } if (trigger & STM32_EXTI_TRIG_FALLING) { if (line < 32) { LL_EXTI_EnableFallingTrig_0_31(1 << line); } else if (line < 64) { #if EXTI_LINES > 32 #if defined(CONFIG_SOC_SERIES_STM32MP1X) __ASSERT_NO_MSG(line); #else LL_EXTI_EnableFallingTrig_32_63(1 << (line - 32)); #endif #else __ASSERT_NO_MSG(line); #endif } else { #if EXTI_LINES > 64 #if !defined(CONFIG_SOC_SERIES_STM32MP1X) __ASSERT_NO_MSG(line); #else LL_EXTI_EnableRisingTrig_64_95(1 << (line - 64)); #endif #endif } } } /** * @brief EXTI ISR handler * * Check EXTI lines in range @min @max for pending interrupts * * @param arg isr argument * @param min low end of EXTI# range * @param max low end of EXTI# range */ static void __stm32_exti_isr(int min, int max, void *arg) { struct device *dev = arg; struct stm32_exti_data *data = dev->driver_data; int line; /* see which bits are set */ for (line = min; line < max; line++) { /* check if interrupt is pending */ if (stm32_exti_is_pending(line)) { /* clear pending interrupt */ stm32_exti_clear_pending(line); /* run callback only if one is registered */ if (!data->cb[line].cb) { continue; } data->cb[line].cb(line, data->cb[line].data); } } } #if defined(CONFIG_SOC_SERIES_STM32F0X) || defined(CONFIG_SOC_SERIES_STM32L0X) static inline void __stm32_exti_isr_0_1(void *arg) { __stm32_exti_isr(0, 2, arg); } static inline void __stm32_exti_isr_2_3(void *arg) { __stm32_exti_isr(2, 4, arg); } static inline void __stm32_exti_isr_4_15(void *arg) { __stm32_exti_isr(4, 16, arg); } #else static inline void __stm32_exti_isr_0(void *arg) { __stm32_exti_isr(0, 1, arg); } static inline void __stm32_exti_isr_1(void *arg) { __stm32_exti_isr(1, 2, arg); } static inline void __stm32_exti_isr_2(void *arg) { __stm32_exti_isr(2, 3, arg); } static inline void __stm32_exti_isr_3(void *arg) { __stm32_exti_isr(3, 4, arg); } static inline void __stm32_exti_isr_4(void *arg) { __stm32_exti_isr(4, 5, arg); } #if defined(CONFIG_SOC_SERIES_STM32MP1X) static inline void __stm32_exti_isr_5(void *arg) { __stm32_exti_isr(5, 6, arg); } static inline void __stm32_exti_isr_6(void *arg) { __stm32_exti_isr(6, 7, arg); } static inline void __stm32_exti_isr_7(void *arg) { __stm32_exti_isr(7, 8, arg); } static inline void __stm32_exti_isr_8(void *arg) { __stm32_exti_isr(8, 9, arg); } static inline void __stm32_exti_isr_9(void *arg) { __stm32_exti_isr(9, 10, arg); } static inline void __stm32_exti_isr_10(void *arg) { __stm32_exti_isr(10, 11, arg); } static inline void __stm32_exti_isr_11(void *arg) { __stm32_exti_isr(11, 12, arg); } static inline void __stm32_exti_isr_12(void *arg) { __stm32_exti_isr(12, 13, arg); } static inline void __stm32_exti_isr_13(void *arg) { __stm32_exti_isr(13, 14, arg); } static inline void __stm32_exti_isr_14(void *arg) { __stm32_exti_isr(14, 15, arg); } static inline void __stm32_exti_isr_15(void *arg) { __stm32_exti_isr(15, 16, arg); } #endif static inline void __stm32_exti_isr_9_5(void *arg) { __stm32_exti_isr(5, 10, arg); } static inline void __stm32_exti_isr_15_10(void *arg) { __stm32_exti_isr(10, 16, arg); } #if defined(CONFIG_SOC_SERIES_STM32F4X) || \ defined(CONFIG_SOC_SERIES_STM32F7X) || \ defined(CONFIG_SOC_SERIES_STM32F2X) || \ defined(CONFIG_SOC_SERIES_STM32MP1X) static inline void __stm32_exti_isr_16(void *arg) { __stm32_exti_isr(16, 17, arg); } static inline void __stm32_exti_isr_18(void *arg) { __stm32_exti_isr(18, 19, arg); } static inline void __stm32_exti_isr_21(void *arg) { __stm32_exti_isr(21, 22, arg); } static inline void __stm32_exti_isr_22(void *arg) { __stm32_exti_isr(22, 23, arg); } #endif #if defined(CONFIG_SOC_SERIES_STM32F7X) || \ defined(CONFIG_SOC_SERIES_STM32MP1X) static inline void __stm32_exti_isr_23(void *arg) { __stm32_exti_isr(23, 24, arg); } #endif #endif /* CONFIG_SOC_SERIES_STM32F0X */ static void __stm32_exti_connect_irqs(struct device *dev); /** * @brief initialize EXTI device driver */ static int stm32_exti_init(struct device *dev) { __stm32_exti_connect_irqs(dev); return 0; } static struct stm32_exti_data exti_data; DEVICE_INIT(exti_stm32, STM32_EXTI_NAME, stm32_exti_init, &exti_data, NULL, PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEVICE); /** * @brief set & unset for the interrupt callbacks */ int stm32_exti_set_callback(int line, int port, stm32_exti_callback_t cb, void *arg) { struct device *dev = DEVICE_GET(exti_stm32); struct stm32_exti_data *data = dev->driver_data; if (data->cb[line].cb) { return -EBUSY; } data->cb[line].cb = cb; data->cb[line].data = arg; return 0; } void stm32_exti_unset_callback(int line) { struct device *dev = DEVICE_GET(exti_stm32); struct stm32_exti_data *data = dev->driver_data; data->cb[line].cb = NULL; data->cb[line].data = NULL; } /** * @brief connect all interrupts */ static void __stm32_exti_connect_irqs(struct device *dev) { ARG_UNUSED(dev); #if defined(CONFIG_SOC_SERIES_STM32F0X) || \ defined(CONFIG_SOC_SERIES_STM32L0X) IRQ_CONNECT(EXTI0_1_IRQn, CONFIG_EXTI_STM32_EXTI1_0_IRQ_PRI, __stm32_exti_isr_0_1, DEVICE_GET(exti_stm32), 0); IRQ_CONNECT(EXTI2_3_IRQn, CONFIG_EXTI_STM32_EXTI3_2_IRQ_PRI, __stm32_exti_isr_2_3, DEVICE_GET(exti_stm32), 0); IRQ_CONNECT(EXTI4_15_IRQn, CONFIG_EXTI_STM32_EXTI15_4_IRQ_PRI, __stm32_exti_isr_4_15, DEVICE_GET(exti_stm32), 0); #elif defined(CONFIG_SOC_SERIES_STM32F1X) || \ defined(CONFIG_SOC_SERIES_STM32F2X) || \ defined(CONFIG_SOC_SERIES_STM32F3X) || \ defined(CONFIG_SOC_SERIES_STM32F4X) || \ defined(CONFIG_SOC_SERIES_STM32F7X) || \ defined(CONFIG_SOC_SERIES_STM32L1X) || \ defined(CONFIG_SOC_SERIES_STM32L4X) || \ defined(CONFIG_SOC_SERIES_STM32MP1X) || \ defined(CONFIG_SOC_SERIES_STM32WBX) IRQ_CONNECT(EXTI0_IRQn, CONFIG_EXTI_STM32_EXTI0_IRQ_PRI, __stm32_exti_isr_0, DEVICE_GET(exti_stm32), 0); IRQ_CONNECT(EXTI1_IRQn, CONFIG_EXTI_STM32_EXTI1_IRQ_PRI, __stm32_exti_isr_1, DEVICE_GET(exti_stm32), 0); #ifdef CONFIG_SOC_SERIES_STM32F3X IRQ_CONNECT(EXTI2_TSC_IRQn, CONFIG_EXTI_STM32_EXTI2_IRQ_PRI, __stm32_exti_isr_2, DEVICE_GET(exti_stm32), 0); #else IRQ_CONNECT(EXTI2_IRQn, CONFIG_EXTI_STM32_EXTI2_IRQ_PRI, __stm32_exti_isr_2, DEVICE_GET(exti_stm32), 0); #endif /* CONFIG_SOC_SERIES_STM32F3X */ IRQ_CONNECT(EXTI3_IRQn, CONFIG_EXTI_STM32_EXTI3_IRQ_PRI, __stm32_exti_isr_3, DEVICE_GET(exti_stm32), 0); IRQ_CONNECT(EXTI4_IRQn, CONFIG_EXTI_STM32_EXTI4_IRQ_PRI, __stm32_exti_isr_4, DEVICE_GET(exti_stm32), 0); #ifndef CONFIG_SOC_SERIES_STM32MP1X IRQ_CONNECT(EXTI9_5_IRQn, CONFIG_EXTI_STM32_EXTI9_5_IRQ_PRI, __stm32_exti_isr_9_5, DEVICE_GET(exti_stm32), 0); IRQ_CONNECT(EXTI15_10_IRQn, CONFIG_EXTI_STM32_EXTI15_10_IRQ_PRI, __stm32_exti_isr_15_10, DEVICE_GET(exti_stm32), 0); #else IRQ_CONNECT(EXTI5_IRQn, CONFIG_EXTI_STM32_EXTI5_IRQ_PRI, __stm32_exti_isr_5, DEVICE_GET(exti_stm32), 0); IRQ_CONNECT(EXTI6_IRQn, CONFIG_EXTI_STM32_EXTI6_IRQ_PRI, __stm32_exti_isr_6, DEVICE_GET(exti_stm32), 0); IRQ_CONNECT(EXTI7_IRQn, CONFIG_EXTI_STM32_EXTI7_IRQ_PRI, __stm32_exti_isr_7, DEVICE_GET(exti_stm32), 0); IRQ_CONNECT(EXTI8_IRQn, CONFIG_EXTI_STM32_EXTI8_IRQ_PRI, __stm32_exti_isr_8, DEVICE_GET(exti_stm32), 0); IRQ_CONNECT(EXTI9_IRQn, CONFIG_EXTI_STM32_EXTI9_IRQ_PRI, __stm32_exti_isr_9, DEVICE_GET(exti_stm32), 0); IRQ_CONNECT(EXTI10_IRQn, CONFIG_EXTI_STM32_EXTI10_IRQ_PRI, __stm32_exti_isr_10, DEVICE_GET(exti_stm32), 0); IRQ_CONNECT(EXTI11_IRQn, CONFIG_EXTI_STM32_EXTI11_IRQ_PRI, __stm32_exti_isr_11, DEVICE_GET(exti_stm32), 0); IRQ_CONNECT(EXTI12_IRQn, CONFIG_EXTI_STM32_EXTI12_IRQ_PRI, __stm32_exti_isr_12, DEVICE_GET(exti_stm32), 0); IRQ_CONNECT(EXTI13_IRQn, CONFIG_EXTI_STM32_EXTI13_IRQ_PRI, __stm32_exti_isr_13, DEVICE_GET(exti_stm32), 0); IRQ_CONNECT(EXTI14_IRQn, CONFIG_EXTI_STM32_EXTI14_IRQ_PRI, __stm32_exti_isr_14, DEVICE_GET(exti_stm32), 0); IRQ_CONNECT(EXTI15_IRQn, CONFIG_EXTI_STM32_EXTI15_IRQ_PRI, __stm32_exti_isr_15, DEVICE_GET(exti_stm32), 0); #endif /* CONFIG_SOC_SERIES_STM32MP1X */ #if defined(CONFIG_SOC_SERIES_STM32F2X) || \ defined(CONFIG_SOC_SERIES_STM32F4X) || \ defined(CONFIG_SOC_SERIES_STM32F7X) IRQ_CONNECT(PVD_IRQn, CONFIG_EXTI_STM32_PVD_IRQ_PRI, __stm32_exti_isr_16, DEVICE_GET(exti_stm32), 0); IRQ_CONNECT(OTG_FS_WKUP_IRQn, CONFIG_EXTI_STM32_OTG_FS_WKUP_IRQ_PRI, __stm32_exti_isr_18, DEVICE_GET(exti_stm32), 0); IRQ_CONNECT(TAMP_STAMP_IRQn, CONFIG_EXTI_STM32_TAMP_STAMP_IRQ_PRI, __stm32_exti_isr_21, DEVICE_GET(exti_stm32), 0); IRQ_CONNECT(RTC_WKUP_IRQn, CONFIG_EXTI_STM32_RTC_WKUP_IRQ_PRI, __stm32_exti_isr_22, DEVICE_GET(exti_stm32), 0); #endif #if CONFIG_SOC_SERIES_STM32F7X IRQ_CONNECT(LPTIM1_IRQn, CONFIG_EXTI_STM32_LPTIM1_IRQ_PRI, __stm32_exti_isr_23, DEVICE_GET(exti_stm32), 0); #endif /* CONFIG_SOC_SERIES_STM32F7X */ #endif }