mirror of
https://github.com/zephyrproject-rtos/zephyr
synced 2025-09-10 06:21:57 +00:00
c7875b75aa
This patch adds I2C Slave support conforming to the syscalls and funcs, only for the STM32 V2 I2C Driver for the moment. It is capable of handling multi-master bus setups. Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Daniel Wagenknecht <wagenknecht@clage.de>
76 lines
1.8 KiB
C
76 lines
1.8 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 _STM32_I2C_H_
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#define _STM32_I2C_H_
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typedef void (*irq_config_func_t)(struct device *port);
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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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struct stm32_pclken pclken;
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I2C_TypeDef *i2c;
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u32_t bitrate;
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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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u32_t dev_config;
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#ifdef CONFIG_I2C_STM32_V1
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u16_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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u8_t *buf;
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} current;
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#ifdef CONFIG_I2C_SLAVE
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bool master_active;
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struct i2c_slave_config *slave_cfg;
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bool slave_attached;
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#endif
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};
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s32_t stm32_i2c_msg_write(struct device *dev, struct i2c_msg *msg, u8_t *flg,
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u16_t sadr);
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s32_t stm32_i2c_msg_read(struct device *dev, struct i2c_msg *msg, u8_t *flg,
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u16_t sadr);
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s32_t stm32_i2c_configure_timing(struct device *dev, u32_t clk);
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int i2c_stm32_runtime_configure(struct device *dev, u32_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_SLAVE
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int i2c_stm32_slave_register(struct device *dev,
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struct i2c_slave_config *config);
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int i2c_stm32_slave_unregister(struct device *dev,
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struct i2c_slave_config *config);
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#endif
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#define DEV_DATA(dev) ((struct i2c_stm32_data * const)(dev)->driver_data)
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#define DEV_CFG(dev) \
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((const struct i2c_stm32_config * const)(dev)->config->config_info)
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#endif /* _STM32_I2C_H_ */
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