147 lines
4.2 KiB
C
147 lines
4.2 KiB
C
/*
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* Copyright (c) 2021 Nuvoton Technology Corporation.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_DRIVERS_GPIO_GPIO_NCT38XX_H_
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#define ZEPHYR_DRIVERS_GPIO_GPIO_NCT38XX_H_
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#include <zephyr/device.h>
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#include <zephyr/drivers/gpio.h>
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#include <zephyr/drivers/i2c.h>
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#include <zephyr/kernel.h>
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/* NCT38XX controller register */
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#define NCT38XX_REG_ALERT 0x10
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#define NCT38XX_REG_ALERT_MASK 0x12
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#define NCT38XX_REG_GPIO_DATA_IN(n) (0xC0 + ((n) * 8))
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#define NCT38XX_REG_GPIO_DATA_OUT(n) (0xC1 + ((n) * 8))
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#define NCT38XX_REG_GPIO_DIR(n) (0xC2 + ((n) * 8))
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#define NCT38XX_REG_GPIO_OD_SEL(n) (0xC3 + ((n) * 8))
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#define NCT38XX_REG_GPIO_ALERT_RISE(n) (0xC4 + ((n) * 8))
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#define NCT38XX_REG_GPIO_ALERT_FALL(n) (0xC5 + ((n) * 8))
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#define NCT38XX_REG_GPIO_ALERT_LEVEL(n) (0xC6 + ((n) * 8))
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#define NCT38XX_REG_GPIO_ALERT_MASK(n) (0xC7 + ((n) * 8))
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#define NCT38XX_REG_MUX_CONTROL 0xD0
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#define NCT38XX_REG_GPIO_ALERT_STAT(n) (0xD4 + (n))
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/* NCT38XX controller register field */
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#define NCT38XX_REG_ALERT_VENDOR_DEFINDED_ALERT 15
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#define NCT38XX_REG_ALERT_MASK_VENDOR_DEFINDED_ALERT 15
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/* Driver config */
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struct gpio_nct38xx_config {
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/* I2C device */
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const struct i2c_dt_spec i2c_dev;
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/* GPIO ports */
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const struct device **sub_gpio_dev;
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uint8_t sub_gpio_port_num;
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/* Alert handler */
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const struct device *alert_dev;
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};
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/* Driver data */
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struct gpio_nct38xx_data {
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/* NCT38XX device */
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const struct device *dev;
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};
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/**
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* @brief Read a NCT38XX register
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*
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* @param dev NCT38XX device
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* @param reg_addr Register address
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* @param val A pointer to a buffer for the data to return
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*
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* @return 0 if successful, otherwise failed.
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*/
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static inline int nct38xx_reg_read_byte(const struct device *dev, uint8_t reg_addr, uint8_t *val)
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{
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const struct gpio_nct38xx_config *const config =
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(const struct gpio_nct38xx_config *)dev->config;
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return i2c_reg_read_byte_dt(&config->i2c_dev, reg_addr, val);
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}
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/**
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* @brief Read a sequence of NCT38XX registers
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*
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* @param dev NCT38XX device
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* @param start_addr The register start address
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* @param buf A pointer to a buffer for the data to return
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* @param num_bytes Number of data to read
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*
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* @return 0 if successful, otherwise failed.
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*/
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static inline int nct38xx_reg_burst_read(const struct device *dev, uint8_t start_addr, uint8_t *buf,
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uint32_t num_bytes)
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{
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const struct gpio_nct38xx_config *const config =
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(const struct gpio_nct38xx_config *)dev->config;
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return i2c_burst_read_dt(&config->i2c_dev, start_addr, buf, num_bytes);
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}
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/**
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* @brief Write a NCT38XX register
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*
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* @param dev NCT38XX device
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* @param reg_addr Register address
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* @param val Data to write
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*
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* @return 0 if successful, otherwise failed.
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*/
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static inline int nct38xx_reg_write_byte(const struct device *dev, uint8_t reg_addr, uint8_t val)
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{
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const struct gpio_nct38xx_config *const config =
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(const struct gpio_nct38xx_config *)dev->config;
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return i2c_reg_write_byte_dt(&config->i2c_dev, reg_addr, val);
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}
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/**
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* @brief Write a sequence of NCT38XX registers
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*
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* @param dev NCT38XX device
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* @param start_addr The register start address
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* @param buf A pointer to a buffer for the data to write
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* @param num_bytes Number of data to write
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*
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* @return 0 if successful, otherwise failed.
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*/
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static inline int nct38xx_reg_burst_write(const struct device *dev, uint8_t start_addr,
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uint8_t *buf, uint32_t num_bytes)
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{
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const struct gpio_nct38xx_config *const config =
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(const struct gpio_nct38xx_config *)dev->config;
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return i2c_burst_write_dt(&config->i2c_dev, start_addr, buf, num_bytes);
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}
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/**
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* @brief Compare data & write a NCT38XX register
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*
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* @param dev NCT38XX device
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* @param reg_addr Register address
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* @param reg_val Old register data
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* @param new_val New register data
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*
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* @return 0 if successful, otherwise failed.
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*/
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static inline int nct38xx_reg_update(const struct device *dev, uint8_t reg_addr, uint8_t reg_val,
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uint8_t new_val)
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{
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if (reg_val == new_val)
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return 0;
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return nct38xx_reg_write_byte(dev, reg_addr, new_val);
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}
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/**
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* @brief Dispatch GPIO port ISR
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*
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* @param dev GPIO port device
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* @return 0 if successful, otherwise failed.
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*/
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int gpio_nct38xx_dispatch_port_isr(const struct device *dev);
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#endif /* ZEPHYR_DRIVERS_GPIO_GPIO_NCT38XX_H_*/
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