1 /* 2 * Copyright (c) 2016 BayLibre, SAS 3 * Copyright (c) 2017 Linaro Ltd 4 * 5 * SPDX-License-Identifier: Apache-2.0 6 * 7 */ 8 9 #ifndef ZEPHYR_DRIVERS_I2C_I2C_LL_STM32_H_ 10 #define ZEPHYR_DRIVERS_I2C_I2C_LL_STM32_H_ 11 12 #include <zephyr/drivers/i2c/stm32.h> 13 14 #ifdef CONFIG_I2C_STM32_BUS_RECOVERY 15 #include <zephyr/drivers/gpio.h> 16 #endif /* CONFIG_I2C_STM32_BUS_RECOVERY */ 17 18 typedef void (*irq_config_func_t)(const struct device *port); 19 20 #if DT_HAS_COMPAT_STATUS_OKAY(st_stm32_i2c_v2) 21 /** 22 * @brief structure to convey optional i2c timings settings 23 */ 24 struct i2c_config_timing { 25 /* i2c peripheral clock in Hz */ 26 uint32_t periph_clock; 27 /* i2c bus speed in Hz */ 28 uint32_t i2c_speed; 29 /* I2C_TIMINGR register value of i2c v2 peripheral */ 30 uint32_t timing_setting; 31 }; 32 #endif 33 34 struct i2c_stm32_config { 35 #ifdef CONFIG_I2C_STM32_INTERRUPT 36 irq_config_func_t irq_config_func; 37 #endif 38 #ifdef CONFIG_I2C_STM32_BUS_RECOVERY 39 struct gpio_dt_spec scl; 40 struct gpio_dt_spec sda; 41 #endif /* CONFIG_I2C_STM32_BUS_RECOVERY */ 42 const struct stm32_pclken *pclken; 43 size_t pclk_len; 44 I2C_TypeDef *i2c; 45 uint32_t bitrate; 46 const struct pinctrl_dev_config *pcfg; 47 #if DT_HAS_COMPAT_STATUS_OKAY(st_stm32_i2c_v2) 48 const struct i2c_config_timing *timings; 49 size_t n_timings; 50 #endif 51 }; 52 53 struct i2c_stm32_data { 54 #ifdef CONFIG_I2C_STM32_INTERRUPT 55 struct k_sem device_sync_sem; 56 #endif 57 struct k_sem bus_mutex; 58 uint32_t dev_config; 59 #if DT_HAS_COMPAT_STATUS_OKAY(st_stm32_i2c_v2) 60 /* Store the current timing structure set by runtime config */ 61 struct i2c_config_timing current_timing; 62 #endif 63 #ifdef CONFIG_I2C_STM32_V1 64 uint16_t slave_address; 65 #endif 66 struct { 67 #ifdef CONFIG_I2C_STM32_V1 68 unsigned int is_restart; 69 unsigned int flags; 70 #endif 71 unsigned int is_write; 72 unsigned int is_arlo; 73 unsigned int is_nack; 74 unsigned int is_err; 75 struct i2c_msg *msg; 76 unsigned int len; 77 uint8_t *buf; 78 } current; 79 #ifdef CONFIG_I2C_TARGET 80 bool master_active; 81 struct i2c_target_config *slave_cfg; 82 #ifdef CONFIG_I2C_STM32_V2 83 struct i2c_target_config *slave2_cfg; 84 #endif 85 bool slave_attached; 86 #endif 87 bool is_configured; 88 bool smbalert_active; 89 enum i2c_stm32_mode mode; 90 #ifdef CONFIG_SMBUS_STM32_SMBALERT 91 i2c_stm32_smbalert_cb_func_t smbalert_cb_func; 92 const struct device *smbalert_cb_dev; 93 #endif 94 }; 95 96 int32_t stm32_i2c_transaction(const struct device *dev, 97 struct i2c_msg msg, uint8_t *next_msg_flags, 98 uint16_t periph); 99 int32_t stm32_i2c_configure_timing(const struct device *dev, uint32_t clk); 100 int i2c_stm32_runtime_configure(const struct device *dev, uint32_t config); 101 int i2c_stm32_get_config(const struct device *dev, uint32_t *config); 102 103 void stm32_i2c_event_isr(void *arg); 104 void stm32_i2c_error_isr(void *arg); 105 #ifdef CONFIG_I2C_STM32_COMBINED_INTERRUPT 106 void stm32_i2c_combined_isr(void *arg); 107 #endif 108 109 #ifdef CONFIG_I2C_TARGET 110 int i2c_stm32_target_register(const struct device *dev, struct i2c_target_config *config); 111 int i2c_stm32_target_unregister(const struct device *dev, struct i2c_target_config *config); 112 #endif 113 114 #endif /* ZEPHYR_DRIVERS_I2C_I2C_LL_STM32_H_ */ 115
