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 typedef void (*irq_config_func_t)(const struct device *port); 13 14 #if DT_HAS_COMPAT_STATUS_OKAY(st_stm32_i2c_v2) 15 /** 16 * @brief structure to convey optional i2c timings settings 17 */ 18 struct i2c_config_timing { 19 /* i2c peripheral clock in Hz */ 20 uint32_t periph_clock; 21 /* i2c bus speed in Hz */ 22 uint32_t i2c_speed; 23 /* I2C_TIMINGR register value of i2c v2 peripheral */ 24 uint32_t timing_setting; 25 }; 26 #endif 27 28 struct i2c_stm32_config { 29 #ifdef CONFIG_I2C_STM32_INTERRUPT 30 irq_config_func_t irq_config_func; 31 #endif 32 struct stm32_pclken pclken; 33 I2C_TypeDef *i2c; 34 uint32_t bitrate; 35 const struct soc_gpio_pinctrl *pinctrl_list; 36 size_t pinctrl_list_size; 37 #if DT_HAS_COMPAT_STATUS_OKAY(st_stm32_i2c_v2) 38 const struct i2c_config_timing *timings; 39 size_t n_timings; 40 #endif 41 }; 42 43 struct i2c_stm32_data { 44 #ifdef CONFIG_I2C_STM32_INTERRUPT 45 struct k_sem device_sync_sem; 46 #endif 47 struct k_sem bus_mutex; 48 uint32_t dev_config; 49 #ifdef CONFIG_I2C_STM32_V1 50 uint16_t slave_address; 51 #endif 52 struct { 53 #ifdef CONFIG_I2C_STM32_V1 54 unsigned int is_restart; 55 unsigned int flags; 56 #endif 57 unsigned int is_write; 58 unsigned int is_arlo; 59 unsigned int is_nack; 60 unsigned int is_err; 61 struct i2c_msg *msg; 62 unsigned int len; 63 uint8_t *buf; 64 } current; 65 #ifdef CONFIG_I2C_SLAVE 66 bool master_active; 67 struct i2c_slave_config *slave_cfg; 68 bool slave_attached; 69 #endif 70 }; 71 72 int32_t stm32_i2c_msg_write(const struct device *dev, struct i2c_msg *msg, 73 uint8_t *flg, 74 uint16_t sadr); 75 int32_t stm32_i2c_msg_read(const struct device *dev, struct i2c_msg *msg, 76 uint8_t *flg, 77 uint16_t sadr); 78 int32_t stm32_i2c_configure_timing(const struct device *dev, uint32_t clk); 79 int i2c_stm32_runtime_configure(const struct device *dev, uint32_t config); 80 81 void stm32_i2c_event_isr(void *arg); 82 void stm32_i2c_error_isr(void *arg); 83 #ifdef CONFIG_I2C_STM32_COMBINED_INTERRUPT 84 void stm32_i2c_combined_isr(void *arg); 85 #endif 86 87 #ifdef CONFIG_I2C_SLAVE 88 int i2c_stm32_slave_register(const struct device *dev, 89 struct i2c_slave_config *config); 90 int i2c_stm32_slave_unregister(const struct device *dev, 91 struct i2c_slave_config *config); 92 #endif 93 94 #define DEV_DATA(dev) ((struct i2c_stm32_data * const)(dev)->data) 95 #define DEV_CFG(dev) \ 96 ((const struct i2c_stm32_config * const)(dev)->config) 97 98 #endif /* ZEPHYR_DRIVERS_I2C_I2C_LL_STM32_H_ */ 99
