0861395713
Implement a SMBus driver for STM32, which reuses the I2C implementation. Signed-off-by: Benedikt Schmidt <benedikt.schmidt@embedded-solutions.at>
111 lines
2.8 KiB
C
111 lines
2.8 KiB
C
/*
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* Copyright (c) 2016 BayLibre, SAS
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* Copyright (c) 2017 Linaro Ltd
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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*/
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#ifndef ZEPHYR_DRIVERS_I2C_I2C_LL_STM32_H_
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#define ZEPHYR_DRIVERS_I2C_I2C_LL_STM32_H_
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#include <zephyr/drivers/i2c/stm32.h>
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#ifdef CONFIG_I2C_STM32_BUS_RECOVERY
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#include <zephyr/drivers/gpio.h>
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#endif /* CONFIG_I2C_STM32_BUS_RECOVERY */
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typedef void (*irq_config_func_t)(const struct device *port);
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#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32_i2c_v2)
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/**
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* @brief structure to convey optional i2c timings settings
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*/
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struct i2c_config_timing {
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/* i2c peripheral clock in Hz */
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uint32_t periph_clock;
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/* i2c bus speed in Hz */
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uint32_t i2c_speed;
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/* I2C_TIMINGR register value of i2c v2 peripheral */
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uint32_t timing_setting;
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};
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#endif
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struct i2c_stm32_config {
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#ifdef CONFIG_I2C_STM32_INTERRUPT
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irq_config_func_t irq_config_func;
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#endif
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#ifdef CONFIG_I2C_STM32_BUS_RECOVERY
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struct gpio_dt_spec scl;
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struct gpio_dt_spec sda;
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#endif /* CONFIG_I2C_STM32_BUS_RECOVERY */
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const struct stm32_pclken *pclken;
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size_t pclk_len;
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I2C_TypeDef *i2c;
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uint32_t bitrate;
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const struct pinctrl_dev_config *pcfg;
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#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32_i2c_v2)
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const struct i2c_config_timing *timings;
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size_t n_timings;
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#endif
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};
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struct i2c_stm32_data {
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#ifdef CONFIG_I2C_STM32_INTERRUPT
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struct k_sem device_sync_sem;
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#endif
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struct k_sem bus_mutex;
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uint32_t dev_config;
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#ifdef CONFIG_I2C_STM32_V1
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uint16_t slave_address;
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#endif
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struct {
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#ifdef CONFIG_I2C_STM32_V1
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unsigned int is_restart;
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unsigned int flags;
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#endif
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unsigned int is_write;
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unsigned int is_arlo;
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unsigned int is_nack;
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unsigned int is_err;
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struct i2c_msg *msg;
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unsigned int len;
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uint8_t *buf;
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} current;
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#ifdef CONFIG_I2C_TARGET
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bool master_active;
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struct i2c_target_config *slave_cfg;
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#ifdef CONFIG_I2C_STM32_V2
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struct i2c_target_config *slave2_cfg;
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#endif
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bool slave_attached;
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#endif
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bool is_configured;
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bool smbalert_active;
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enum i2c_stm32_mode mode;
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#ifdef CONFIG_SMBUS_STM32_SMBALERT
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i2c_stm32_smbalert_cb_func_t smbalert_cb_func;
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const struct device *smbalert_cb_dev;
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#endif
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};
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int32_t stm32_i2c_transaction(const struct device *dev,
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struct i2c_msg msg, uint8_t *next_msg_flags,
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uint16_t periph);
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int32_t stm32_i2c_configure_timing(const struct device *dev, uint32_t clk);
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int i2c_stm32_runtime_configure(const struct device *dev, uint32_t config);
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int i2c_stm32_get_config(const struct device *dev, uint32_t *config);
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void stm32_i2c_event_isr(void *arg);
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void stm32_i2c_error_isr(void *arg);
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#ifdef CONFIG_I2C_STM32_COMBINED_INTERRUPT
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void stm32_i2c_combined_isr(void *arg);
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#endif
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#ifdef CONFIG_I2C_TARGET
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int i2c_stm32_target_register(const struct device *dev, struct i2c_target_config *config);
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int i2c_stm32_target_unregister(const struct device *dev, struct i2c_target_config *config);
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#endif
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#endif /* ZEPHYR_DRIVERS_I2C_I2C_LL_STM32_H_ */
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