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zephyr/drivers/gpio/gpio_pca_series.c
James Roy e9a5b48b6c drivers: gpio: Fix uninitialized variable in gpio_pca_series 
Fix uninitialized val variables scanned by Coverity.

Signed-off-by: James Roy <rruuaanng@outlook.com>
2025-01-28 23:41:19 +01:00

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71 KiB
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/*
* Copyright 2024 NXP
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file Driver for PCA(L)xxxx SERIES I2C-based GPIO expander.
*/
#include <errno.h>
#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <zephyr/init.h>
#include <zephyr/sys/byteorder.h>
#include <zephyr/sys/util.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/drivers/gpio/gpio_utils.h>
#include <zephyr/drivers/i2c.h>
#define LOG_LEVEL CONFIG_GPIO_LOG_LEVEL
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(gpio_pca_series);
/** Private debug macro, enable more error checking and print more log. */
/* #define GPIO_NXP_PCA_SERIES_DEBUG */
/* Feature flags */
#define PCA_HAS_LATCH BIT(0) /** + output_drive_strength, + input_latch */
#define PCA_HAS_PULL BIT(1) /** + pull_enable, + pull_select */
#define PCA_HAS_INT_MASK BIT(2) /** + interrupt_mask, + int_status */
#define PCA_HAS_INT_EXTEND BIT(3) /** + interrupt_edge, + interrupt_clear */
#define PCA_HAS_OUT_CONFIG BIT(4) /** + input_status, + output_config */
/* get port and pin from gpio_pin_t */
#define PCA_PORT(gpio_pin) (gpio_pin >> 3)
#define PCA_PIN(gpio_pin) (gpio_pin & GENMASK(2, 0))
#define PCA_REG_INVALID (0xff)
/**
* @brief part number definition.
*/
enum gpio_pca_series_part_no {
PCA_PART_NO_PCA9538,
PCA_PART_NO_PCA9539,
PCA_PART_NO_PCA9554,
PCA_PART_NO_PCA9555,
PCA_PART_NO_PCAL6524,
PCA_PART_NO_PCAL6534,
};
/**
* @brief part name definition for debug.
*
* @note must be consistent in order with @ref enum gpio_pca_series_part_no
*/
const char *const gpio_pca_series_part_name[] = {
"pca9538",
"pca9539",
"pca9554",
"pca9555",
"pcal6524",
"pcal6534",
};
/**
* Device reg layout types:
* - Type 0: PCA953X, PCA955X
* - Type 1: PCAL953X, PCAL955X, PCAL64XXA
* - Type 2: PCA957X
* - Type 3: PCAL65XX
*/
enum gpio_pca_series_reg_type { /** Type0 Type1 Type2 Type3 */
PCA_REG_TYPE_1B_INPUT_PORT = 0U, /** x x x x */
PCA_REG_TYPE_1B_OUTPUT_PORT, /** x x x x */
/* PCA_REG_TYPE_1B_POLARITY_INVERSION, x x x x * (unused, omitted) */
PCA_REG_TYPE_1B_CONFIGURATION, /** x x x x */
PCA_REG_TYPE_2B_OUTPUT_DRIVE_STRENGTH, /** x x */
PCA_REG_TYPE_1B_INPUT_LATCH, /** x x */
PCA_REG_TYPE_1B_PULL_ENABLE, /** x x*1 x */
PCA_REG_TYPE_1B_PULL_SELECT, /** x x x */
PCA_REG_TYPE_1B_INPUT_STATUS, /** x */
PCA_REG_TYPE_1B_OUTPUT_CONFIG, /** x*2 */
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT /** */
PCA_REG_TYPE_1B_INTERRUPT_MASK, /** x x x */
PCA_REG_TYPE_1B_INTERRUPT_STATUS, /** x x x */
PCA_REG_TYPE_2B_INTERRUPT_EDGE, /** x */
PCA_REG_TYPE_1B_INTERRUPT_CLEAR, /** x */
# ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
PCA_REG_TYPE_1B_INPUT_HISTORY, /** x x x * (cache registry) */
PCA_REG_TYPE_1B_INTERRUPT_RISE, /** x x x * (cache registry) */
PCA_REG_TYPE_1B_INTERRUPT_FALL, /** x x x * (cache registry) */
# endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
#endif /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
PCA_REG_TYPE_COUNT, /** not a register */
};
/**
* #1: "pull_enable" register is named "bus_hold" in PCA957x datasheet.
* #2: this is for "individual pin output configuration register". We do not use
* port-level "pin output configuration" register.
*/
const char *const gpio_pca_series_reg_name[] = {
"1b_input_port",
"1b_output_port",
/* "1b_polarity_inversion," */
"1b_configuration",
"2b_output_drive_strength",
"1b_input_latch",
"1b_pull_enable",
"1b_pull_select",
"1b_input_status",
"1b_output_config",
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
"1b_interrupt_mask",
"1b_interrupt_status",
"2b_interrupt_edge",
"1b_interrupt_clear",
# ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
"1b_input_history",
"1b_interrupt_rise",
"ib_interrupt_fall",
# endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
#endif /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
"reg_end",
};
/**
* @brief interrupt config for interrupt_edge register
*
* @note Only applies to part no with PCA_HAS_INT_EXTEND capability.
*/
enum PCA_INTERRUPT_config_extended {
PCA_INTERRUPT_LEVEL_CHANGE = 0U, /* default */
PCA_INTERRUPT_RISING_EDGE,
PCA_INTERRUPT_FALLING_EDGE,
PCA_INTERRUPT_EITHER_EDGE,
};
struct gpio_pca_series_part_config {
uint8_t port_no; /* number of 8-pin ports on device */
uint8_t flags; /* capability flags */
const uint8_t *regs; /* pointer to register map */
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
# ifdef GPIO_NXP_PCA_SERIES_DEBUG
uint8_t cache_size;
# endif /* GPIO_NXP_PCA_SERIES_DEBUG */
const uint8_t *cache_map;
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
};
/** Configuration data */
struct gpio_pca_series_config {
struct gpio_driver_config common; /* gpio_driver_config needs to be first */
struct i2c_dt_spec i2c; /* i2c bus dt spec */
const struct gpio_pca_series_part_config *part_cfg; /* config of part unmber */
struct gpio_dt_spec gpio_rst; /* device reset gpio */
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
struct gpio_dt_spec gpio_int; /** device interrupt gpio */
#endif /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
};
/** Runtime driver data */
struct gpio_pca_series_data {
struct gpio_driver_data common; /** gpio_driver_data needs to be first */
struct k_sem lock;
void *cache; /** device spicific reg cache
* - if CONFIG_GPIO_PCA_SERIES_CACHE_ALL is set,
* it points to device specific cache memory.
* - if CONFIG_GPIO_PCA_SERIES_CACHE_ALL is not set,
* it point to a struct gpio_pca_series_reg_cache_mini
* instance.
*/
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
const struct device *self; /** Self-reference to the driver instance */
struct gpio_callback gpio_cb; /** gpio_int ISR callback */
sys_slist_t callbacks; /** port pin callbacks list */
struct k_work int_work; /** worker that fire callbacks */
#endif
};
/**
* gpio_pca_reg_access_api
* {
*/
/**
* @brief get internal address of register from register type
*
* @param dev device struct
* @param reg_type value from enum gpio_pca_series_reg_type
* @return uint8_t PCA_REG_INVALID if reg is not used
* other internal address of register
*/
static inline uint8_t gpio_pca_series_reg_get_addr(const struct device *dev,
enum gpio_pca_series_reg_type reg_type)
{
const struct gpio_pca_series_config *cfg = dev->config;
#ifdef GPIO_NXP_PCA_SERIES_DEBUG
if (reg_type >= PCA_REG_TYPE_COUNT) {
LOG_ERR("reg_type %d out of range", reg_type);
return 0;
}
#endif /* GPIO_NXP_PCA_SERIES_DEBUG */
return cfg->part_cfg->regs[reg_type];
}
/**
* @brief get per-port size for register
*
* @param dev device struct
* @param reg_type value from enum gpio_pca_series_reg_type
* @return uint32_t size in bytes
* 0 if fail
*/
static inline uint32_t gpio_pca_series_reg_size_per_port(const struct device *dev,
enum gpio_pca_series_reg_type reg_type)
{
#ifdef GPIO_NXP_PCA_SERIES_DEBUG
if (reg_type >= PCA_REG_TYPE_COUNT) {
LOG_ERR("reg_type %d out of range", reg_type);
return 0;
}
#endif /* GPIO_NXP_PCA_SERIES_DEBUG */
switch (reg_type) {
case PCA_REG_TYPE_1B_INPUT_PORT:
case PCA_REG_TYPE_1B_OUTPUT_PORT:
/* case PCA_REG_TYPE_1B_POLARITY_INVERSION: */
case PCA_REG_TYPE_1B_CONFIGURATION:
case PCA_REG_TYPE_1B_INPUT_LATCH:
case PCA_REG_TYPE_1B_PULL_ENABLE:
case PCA_REG_TYPE_1B_PULL_SELECT:
case PCA_REG_TYPE_1B_INPUT_STATUS:
case PCA_REG_TYPE_1B_OUTPUT_CONFIG:
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
case PCA_REG_TYPE_1B_INTERRUPT_MASK:
case PCA_REG_TYPE_1B_INTERRUPT_STATUS:
case PCA_REG_TYPE_1B_INTERRUPT_CLEAR:
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
case PCA_REG_TYPE_1B_INPUT_HISTORY:
case PCA_REG_TYPE_1B_INTERRUPT_RISE:
case PCA_REG_TYPE_1B_INTERRUPT_FALL:
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
#endif /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
return 1;
case PCA_REG_TYPE_2B_OUTPUT_DRIVE_STRENGTH:
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
case PCA_REG_TYPE_2B_INTERRUPT_EDGE:
#endif /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
return 2;
default:
LOG_ERR("unsupported reg type %d", reg_type);
return 0; /** should never happen */
}
}
/**
* @brief get read size for register
*
* @param dev device struct
* @param reg_type value from enum gpio_pca_series_reg_type
* @return uint32_t size in bytes
* 0 if fail
*/
static inline uint32_t gpio_pca_series_reg_size(const struct device *dev,
enum gpio_pca_series_reg_type reg_type)
{
const struct gpio_pca_series_config *cfg = dev->config;
return gpio_pca_series_reg_size_per_port(dev, reg_type) * cfg->part_cfg->port_no;
}
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
/** forward declarations */
static inline uint8_t gpio_pca_series_reg_cache_offset(const struct device *dev,
enum gpio_pca_series_reg_type reg_type);
static inline int gpio_pca_series_reg_cache_update(const struct device *dev,
enum gpio_pca_series_reg_type reg_type,
const uint8_t *buf);
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
/**
* @brief read register with i2c interface.
*
* @note if CONFIG_GPIO_PCA_SERIES_CACHE_ALL is enabled, this will
* not update reg cache. Cache must be updated with
* @ref gpio_pca_series_reg_cache_update.
*
* @param dev device struct
* @param reg_type value from enum gpio_pca_series_reg_type
* @param buf pointer to data in little-endian byteorder
* @return int 0 if success
* -EFAULT if register is not supported
* -EIO if i2c failure
*/
static inline int gpio_pca_series_reg_read(const struct device *dev,
enum gpio_pca_series_reg_type reg_type, uint8_t *buf)
{
const struct gpio_pca_series_config *cfg = dev->config;
int ret = 0;
uint32_t size = gpio_pca_series_reg_size(dev, reg_type);
uint8_t addr = gpio_pca_series_reg_get_addr(dev, reg_type);
LOG_DBG("device read type %d addr 0x%x len %d", reg_type, addr, size);
#ifdef GPIO_NXP_PCA_SERIES_DEBUG
if (!buf) {
return -EFAULT;
}
if (addr == PCA_REG_INVALID) {
LOG_ERR("trying to read unsupported reg, reg type %d", reg_type);
return -EFAULT;
}
#endif /* GPIO_NXP_PCA_SERIES_DEBUG */
ret = i2c_write_read_dt(&cfg->i2c, (uint8_t *)&addr, 1, (uint8_t *)buf, size);
if (ret) {
LOG_ERR("i2c read error [%d]", ret);
}
return ret;
}
/**
* @brief write register with i2c interface.
*
* @note if CONFIG_GPIO_PCA_SERIES_CACHE_ALL is enabled, this will
* also update reg cache.
*
* @param dev device struct
* @param reg_type value from enum gpio_pca_series_reg_type
* @param buf pointer to data in little-endian byteorder
* @return int 0 if success
* -EFAULT if register is not supported
* -EIO if i2c failure
*/
static inline int gpio_pca_series_reg_write(const struct device *dev,
enum gpio_pca_series_reg_type reg_type, const uint8_t *buf)
{
const struct gpio_pca_series_config *cfg = dev->config;
int ret = 0;
struct i2c_msg msg[2];
uint32_t size = gpio_pca_series_reg_size(dev, reg_type);
uint8_t addr = gpio_pca_series_reg_get_addr(dev, reg_type);
#ifdef GPIO_NXP_PCA_SERIES_DEBUG
if (!buf) {
return -EFAULT;
}
if (addr == PCA_REG_INVALID) {
LOG_ERR("trying to write unsupported reg type %d", reg_type);
return -EFAULT;
}
#endif /* GPIO_NXP_PCA_SERIES_DEBUG */
LOG_DBG("device write type %d addr 0x%x len %d", reg_type, addr, size);
msg[0].buf = (uint8_t *)&addr;
msg[0].len = 1;
msg[0].flags = I2C_MSG_WRITE;
msg[1].buf = (uint8_t *)buf;
msg[1].len = size;
msg[1].flags = I2C_MSG_WRITE | I2C_MSG_STOP;
ret = i2c_transfer_dt(&cfg->i2c, msg, 2);
if (ret) {
LOG_ERR("i2c write error [%d]", ret);
return ret;
}
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
if (gpio_pca_series_reg_cache_offset(dev, reg_type) != PCA_REG_INVALID) {
(void)gpio_pca_series_reg_cache_update(dev, reg_type, buf);
}
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
return ret;
}
/**
* }
* gpio_pca_reg_access_api
*/
/**
* gpio_pca_reg_cache_api
* {
* @note full cache is stored in le byteorder, consistent with reg layout.
* mini cache is stored in cpu byteorder
*/
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
/**
* @brief get memory offset of register cache from register type
*
* @param dev device struct
* @param reg_type value from enum gpio_pca_series_reg_type
* @return uint8_t PCA_REG_INVALID if reg is not used or uncacheable
* other offset in bytes related to cache pointer
*/
static inline uint8_t gpio_pca_series_reg_cache_offset(const struct device *dev,
enum gpio_pca_series_reg_type reg_type)
{
const struct gpio_pca_series_config *cfg = dev->config;
if (cfg->part_cfg->cache_map[reg_type] == PCA_REG_INVALID) {
return PCA_REG_INVALID;
} else {
return cfg->part_cfg->cache_map[reg_type] * cfg->part_cfg->port_no;
}
}
/**
* @brief read all cacheable physical registers from device and update them
* in cache
*
* @param dev device struct
* @param reg_type value from enum gpio_pca_series_reg_type
* @return uint8_t PCA_REG_INVALID if reg is not used or uncacheable
* other offset in bytes related to cache pointer
*/
static inline int gpio_pca_series_reg_cache_reset(const struct device *dev)
{
struct gpio_pca_series_data *data = dev->data;
int ret = 0;
for (int reg_type = 0; reg_type < PCA_REG_TYPE_COUNT; ++reg_type) {
uint8_t cache_offset = gpio_pca_series_reg_cache_offset(dev, reg_type);
if (cache_offset == PCA_REG_INVALID) {
continue;
}
LOG_DBG("cache init type %d", reg_type);
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
/**
* On devices without PCA_HAS_INT_EXTEND calabilitiy,
* PCA_REG_TYPE_2B_INTERRUPT_EDGE caches mask of rising and falling pins,
* while the actual register is not present. Account for that here:
*/
uint8_t reg_addr = gpio_pca_series_reg_get_addr(dev, reg_type);
if (reg_addr == PCA_REG_INVALID) {
const uint8_t reset_value_0[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
switch (reg_type) {
case PCA_REG_TYPE_1B_INPUT_HISTORY:
ret = gpio_pca_series_reg_read(dev, PCA_REG_TYPE_1B_INPUT_PORT,
((uint8_t *)data->cache) + cache_offset);
if (ret) {
LOG_ERR("cache initial input read failed %d", ret);
}
break;
case PCA_REG_TYPE_1B_INTERRUPT_RISE:
case PCA_REG_TYPE_1B_INTERRUPT_FALL:
ret = gpio_pca_series_reg_cache_update(dev, reg_type,
reset_value_0);
if (ret) {
LOG_ERR("init initial interrupt config failed %d", ret);
}
break;
default:
LOG_ERR("trying to cache reg that is not present");
break;
}
if (ret) {
break;
}
continue;
}
#endif /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
ret = gpio_pca_series_reg_read(dev, reg_type,
((uint8_t *)data->cache) + cache_offset);
if (ret) {
LOG_ERR("reg type %d cache init fail %d", reg_type, ret);
break;
}
}
return ret;
}
/**
* @brief read register value from reg cache
*
* @param dev device struct
* @param reg_type value from enum gpio_pca_series_reg_type
* @param buf pointer to read data in little-endian byteorder
* @return int 0 if success
* -EINVAL if invalid arguments
* -EACCES if register is uncacheable
*/
static inline int gpio_pca_series_reg_cache_read(const struct device *dev,
enum gpio_pca_series_reg_type reg_type,
uint8_t *buf)
{
struct gpio_pca_series_data *data = dev->data;
int ret = 0;
uint8_t offset = gpio_pca_series_reg_cache_offset(dev, reg_type);
uint32_t size = gpio_pca_series_reg_size(dev, reg_type);
uint8_t *src;
#ifdef GPIO_NXP_PCA_SERIES_DEBUG
if (!buf) {
return -EINVAL;
}
if (offset == PCA_REG_INVALID) {
LOG_ERR("can not get noncacheable reg %d");
return -EFAULT;
}
#endif /* GPIO_NXP_PCA_SERIES_DEBUG */
src = ((uint8_t *)data->cache) + offset;
LOG_DBG("cache read type %d len %d mem addr 0x%p", reg_type, size, src);
memcpy(buf, src, size);
return ret;
}
/**
* @brief update register cache from device or existing value.
*
* @param dev device struct
* @param reg_type value from enum gpio_pca_series_reg_type
* @param buf pointer to new data to update from, in little-endian byteorder
* @return int 0 if success
* -EINVAL if invalid arguments
* -EACCES if register is uncacheable
*/
static inline int gpio_pca_series_reg_cache_update(const struct device *dev,
enum gpio_pca_series_reg_type reg_type,
const uint8_t *buf)
{
struct gpio_pca_series_data *data = dev->data;
uint8_t offset = gpio_pca_series_reg_cache_offset(dev, reg_type);
uint32_t size = gpio_pca_series_reg_size(dev, reg_type);
uint8_t *dst;
#ifdef GPIO_NXP_PCA_SERIES_DEBUG
if (!buf) {
return -EINVAL;
}
if (offset == PCA_REG_INVALID) {
LOG_ERR("can not update non-cacheable reg type %d", reg_type);
return -EACCES;
}
#endif /* GPIO_NXP_PCA_SERIES_DEBUG */
LOG_DBG("cache update type %d len %d from %s", reg_type, size,
(buf ? "buffer" : "device"));
dst = ((uint8_t *)data->cache) + offset;
LOG_DBG("cache write mem addr 0x%p len %d", dst, size);
/** update cache from buf */
memcpy(dst, buf, size);
return 0;
}
#else /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
#define gpio_pca_series_reg_cache_read gpio_pca_series_reg_read
struct gpio_pca_series_reg_cache_mini {
uint32_t output; /** cache output value for faster output */
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
uint32_t input_old; /** only used when interrupt mask & edge config is not present */
uint32_t int_rise; /** only used if interrupt edge is software-compared */
uint32_t int_fall; /** only used if interrupt edge is software-compared */
#endif /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
};
static inline struct gpio_pca_series_reg_cache_mini *gpio_pca_series_reg_cache_mini_get(
const struct device *dev)
{
struct gpio_pca_series_data *data = dev->data;
struct gpio_pca_series_reg_cache_mini *cache =
(struct gpio_pca_series_reg_cache_mini *)(&data->cache);
LOG_DBG("mini cache addr 0x%p", cache);
return cache;
}
static inline int gpio_pca_series_reg_cache_mini_reset(const struct device *dev)
{
const struct gpio_pca_series_config *cfg = dev->config;
struct gpio_pca_series_reg_cache_mini *cache =
gpio_pca_series_reg_cache_mini_get(dev);
int ret = 0;
ret = gpio_pca_series_reg_read(dev, PCA_REG_TYPE_1B_OUTPUT_PORT,
(uint8_t *)&cache->output);
if (ret) {
LOG_ERR("minimum cache failed to read initial output: %d", ret);
goto out;
}
cache->output = sys_le32_to_cpu(cache->output);
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
cache->int_rise = 0;
cache->int_fall = 0;
/* Read initial input value */
enum gpio_pca_series_reg_type input_reg =
cfg->part_cfg->flags & PCA_HAS_OUT_CONFIG ?
PCA_REG_TYPE_1B_INPUT_STATUS : PCA_REG_TYPE_1B_INPUT_PORT;
ret = gpio_pca_series_reg_read(dev, input_reg, (uint8_t *)&cache->input_old);
if (ret) {
LOG_ERR("minimum cache failed to read initial input: %d", ret);
}
cache->input_old = sys_le32_to_cpu(cache->input_old);
#else
ARG_UNUSED(cfg);
#endif /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
out:
return ret;
}
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
/**
* }
* gpio_pca_cache_api
*/
/**
* gpio_pca_custom_api
* {
*/
/**
* @brief Reset function of pca_series
*
* This function pulls reset pin to reset a pca_series
* device if reset_pin is present. Otherwise it write
* reset value to device registers.
*/
static inline void gpio_pca_series_reset(const struct device *dev)
{
const struct gpio_pca_series_config *cfg = dev->config;
const uint8_t reset_value_0[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
const uint8_t reset_value_1[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
int ret = 0;
/** Reset pin connected, do hardware reset */
if (cfg->gpio_rst.port != NULL) {
if (!device_is_ready(cfg->gpio_rst.port)) {
goto sw_rst;
}
/* Reset gpio should be set to active LOW in dts */
ret = gpio_pin_configure_dt(&cfg->gpio_rst,
GPIO_OUTPUT_HIGH | GPIO_OUTPUT_INIT_LOGICAL);
if (ret) {
goto sw_rst;
}
k_sleep(K_USEC(1));
ret = gpio_pin_set_dt(&cfg->gpio_rst, 0U);
if (ret) {
goto sw_rst;
}
k_sleep(K_USEC(1));
return;
}
sw_rst:
/** Warn that gpio configured but failed */
if (cfg->gpio_rst.port != NULL) {
LOG_WRN("gpio reset failed, fallback to soft reset");
}
/**
* Reset pin not connected, write reset value to registers
* No need to check return, as unsupported reg will return early with error
*/
gpio_pca_series_reg_write(dev, PCA_REG_TYPE_1B_OUTPUT_PORT, reset_value_1);
gpio_pca_series_reg_write(dev, PCA_REG_TYPE_1B_CONFIGURATION, reset_value_1);
if (cfg->part_cfg->flags & PCA_HAS_LATCH) {
gpio_pca_series_reg_write(dev, PCA_REG_TYPE_2B_OUTPUT_DRIVE_STRENGTH,
reset_value_1);
gpio_pca_series_reg_write(dev, PCA_REG_TYPE_1B_INPUT_LATCH, reset_value_0);
}
if (cfg->part_cfg->flags & PCA_HAS_PULL) {
gpio_pca_series_reg_write(dev, PCA_REG_TYPE_1B_PULL_ENABLE, reset_value_0);
gpio_pca_series_reg_write(dev, PCA_REG_TYPE_1B_PULL_SELECT, reset_value_1);
}
if (cfg->part_cfg->flags & PCA_HAS_OUT_CONFIG) {
gpio_pca_series_reg_write(dev, PCA_REG_TYPE_1B_OUTPUT_CONFIG, reset_value_0);
}
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
if (cfg->part_cfg->flags & PCA_HAS_INT_MASK) {
gpio_pca_series_reg_write(dev, PCA_REG_TYPE_1B_INTERRUPT_MASK, reset_value_1);
}
if (cfg->part_cfg->flags & PCA_HAS_INT_EXTEND) {
gpio_pca_series_reg_write(dev, PCA_REG_TYPE_2B_INTERRUPT_EDGE, reset_value_0);
}
#endif /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
}
#ifdef GPIO_NXP_PCA_SERIES_DEBUG
/**
* @brief Dump all available register and cache for debug purpose.
*
* @note This function does not consider cpu byteorder.
*/
void gpio_pca_series_debug_dump(const struct device *dev)
{
const struct gpio_pca_series_config *cfg = dev->config;
struct gpio_pca_series_data *data = dev->data;
int ret = 0;
LOG_WRN("**** debug dump ****");
LOG_WRN("device: %s", dev->name);
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
LOG_WRN("cache base addr: 0x%p size: 0x%2.2x",
data->cache, cfg->part_cfg->cache_size);
#else
LOG_WRN("cache base addr: 0x%p", data->cache);
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
LOG_WRN("register profile:");
LOG_WRN("type\t"
"name\t\t\t"
"addr\t"
"reg_value\t\t\t"
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
"cache\t"
"cache_value\t\t"
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
);
for (int reg_type = 0; reg_type < PCA_REG_TYPE_COUNT; ++reg_type) {
uint8_t reg = cfg->part_cfg->regs[reg_type];
uint8_t reg_val[8];
uint64_t *reg_val_p = (uint64_t *)&reg_val;
uint32_t reg_size = gpio_pca_series_reg_size(dev, reg_type);
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
uint8_t cache = gpio_pca_series_reg_cache_offset(dev, reg_type);
uint8_t cache_val[8];
uint64_t *cache_val_p = (uint64_t *)&cache_val;
if (reg == PCA_REG_INVALID && cache == PCA_REG_INVALID)
#else
if (reg == PCA_REG_INVALID)
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
{
continue;
}
if (reg != PCA_REG_INVALID) {
*reg_val_p = 0;
ret = gpio_pca_series_reg_read(dev, reg_type, reg_val);
if (ret) {
LOG_ERR("read reg error from reg type %d, invalidate this reg",
reg_type);
reg = PCA_REG_INVALID;
}
}
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
if (cache != PCA_REG_INVALID) {
*cache_val_p = 0;
ret = gpio_pca_series_reg_cache_read(dev, reg_type, cache_val);
if (ret) {
LOG_ERR("read reg cache error from reg type %d, invalidate this "
"reg cache",
reg_type);
reg = PCA_REG_INVALID;
}
}
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
/** do_print */
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
if (reg != PCA_REG_INVALID && cache != PCA_REG_INVALID) {
LOG_WRN("%.2d\t%-24s\t0x%2.2x\t0x%16.16x\t0x%2.2x\t0x%16.16x\t"
, reg_type, gpio_pca_series_reg_name[reg_type]
, reg, *reg_val_p
, cache, *cache_val_p
);
if (memcmp(reg_val, cache_val, reg_size)) {
LOG_ERR("reg %d cache mismatch", reg_type);
}
} else if (reg == PCA_REG_INVALID && cache != PCA_REG_INVALID) {
/**
* On devices without PCA_HAS_INT_EXTEND calabilitiy,
* PCA_REG_TYPE_2B_INTERRUPT_EDGE caches mask of rising and falling pins,
* while the actual register is not present. Account for that here:
*/
LOG_WRN("%.2d\t%-24s\tNone\tNone\t\t\t0x%2.2x\t0x%16.16x\t"
, reg_type, gpio_pca_series_reg_name[reg_type]
, cache, *cache_val_p
);
} else {
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
LOG_WRN("%.2d\t%-24s\t0x%2.2x\t0x%16.16x\t"
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
"None\tNone\t\t\t"
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
, reg_type, gpio_pca_series_reg_name[reg_type]
, reg, *reg_val_p
);
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
}
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
}
LOG_WRN("**** dump finish ****");
}
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
/**
* @brief Validate the cache api by filling data to the cache.
*/
void gpio_pca_series_cache_test(const struct device *dev)
{
const struct gpio_pca_series_config *cfg = dev->config;
const uint8_t reset_value_0[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
const uint8_t reset_value_1[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
uint8_t buffer[8];
uint8_t expected_offset = 0U;
uint64_t *buffer_p = (uint64_t *)buffer;
LOG_WRN("**** cache test ****");
LOG_WRN("device: %s", dev->name);
for (int reg_type = 0; reg_type < PCA_REG_TYPE_COUNT; ++reg_type) {
uint8_t cache_offset = gpio_pca_series_reg_cache_offset(dev, reg_type);
uint32_t cache_size = gpio_pca_series_reg_size(dev, reg_type);
if (cache_offset == PCA_REG_INVALID) {
LOG_WRN("skip reg %d: not present or non-cacheable", reg_type);
continue;
}
if (cache_offset != expected_offset) {
LOG_ERR("reg %d cache offset 0x%2.2x error, expected 0x%2.2x",
reg_type, cache_offset, expected_offset);
break;
}
expected_offset += cache_size;
LOG_WRN("testing reg %d size %d", reg_type, cache_size);
(void)gpio_pca_series_reg_cache_update(dev, reg_type, reset_value_0);
*buffer_p = 0;
gpio_pca_series_reg_cache_read(dev, reg_type, buffer);
LOG_WRN("fill 00, result: 0x%16.16x", *buffer_p);
(void)gpio_pca_series_reg_cache_update(dev, reg_type, reset_value_1);
*buffer_p = 0;
gpio_pca_series_reg_cache_read(dev, reg_type, buffer);
LOG_WRN("fill ff, result: 0x%16.16x", *buffer_p);
}
LOG_WRN("**** test finish ****");
}
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
#endif /* GPIO_NXP_PCA_SERIES_DEBUG */
/**
* }
* gpio_pca_custom_api
*/
/**
* gpio_pca_zephyr_gpio_api
* {
*/
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
/** Forward declaration */
static inline void gpio_pca_series_interrupt_handler_standard(
const struct device *dev, gpio_port_value_t *input_value);
#endif /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
/**
* @brief configure gpio port.
*
* @note This API applies to all supported part no. Capabilities (
* PCA_HAS_PULL and PCA_HAS_OUT_CONFIG) are evaluated and handled.
*
* @return int 0 if success
* -ENOTSUP if unsupported config flags are provided
*/
static int gpio_pca_series_pin_configure(const struct device *dev,
gpio_pin_t pin, gpio_flags_t flags)
{
const struct gpio_pca_series_config *cfg = dev->config;
struct gpio_pca_series_data *data = dev->data;
uint32_t reg_value = 0;
int ret = 0;
if ((flags & GPIO_INPUT) && (flags & GPIO_OUTPUT)) {
return -ENOTSUP;
}
if ((flags & GPIO_SINGLE_ENDED) &&
(cfg->part_cfg->flags & PCA_HAS_OUT_CONFIG) == 0U) {
return -ENOTSUP;
}
if ((flags & GPIO_PULL_UP) || (flags & GPIO_PULL_DOWN)) {
if ((cfg->part_cfg->flags & PCA_HAS_PULL) == 0U) {
return -ENOTSUP;
}
} /* Can't do I2C bus operations from an ISR */
if (k_is_in_isr()) {
return -EWOULDBLOCK;
}
LOG_DBG("dev %s configure pin %d flag 0x%x", dev->name, pin, flags);
k_sem_take(&data->lock, K_FOREVER);
/**
* TODO: Only write 1 byte.
*
* The config api only configures 1 pin, so only need to write the
* modified byte. Need to create new register & cache api to provide
* single byte access.
* This applies to: pin_configure, pin_interrupt_configure
*/
if (cfg->part_cfg->flags & PCA_HAS_OUT_CONFIG) {
/* configure PCA_REG_TYPE_1B_OUTPUT_CONFIG */
ret = gpio_pca_series_reg_cache_read(dev,
PCA_REG_TYPE_1B_OUTPUT_CONFIG, (uint8_t *)&reg_value);
reg_value = sys_le32_to_cpu(reg_value);
if (flags & GPIO_SINGLE_ENDED) {
reg_value |= (BIT(pin)); /* set bit to set open-drain */
} else {
reg_value &= (~BIT(pin)); /* clear bit to set push-pull */
}
reg_value = sys_cpu_to_le32(reg_value);
ret = gpio_pca_series_reg_write(dev,
PCA_REG_TYPE_1B_OUTPUT_CONFIG, (uint8_t *)&reg_value);
}
if ((cfg->part_cfg->flags & PCA_HAS_PULL)) {
if ((flags & GPIO_PULL_UP) || (flags & GPIO_PULL_DOWN)) {
/* configure PCA_REG_TYPE_1B_PULL_SELECT */
ret = gpio_pca_series_reg_cache_read(dev,
PCA_REG_TYPE_1B_PULL_SELECT, (uint8_t *)&reg_value);
reg_value = sys_le32_to_cpu(reg_value);
if (flags & GPIO_PULL_UP) {
reg_value |= (BIT(pin));
} else {
reg_value &= (~BIT(pin));
}
reg_value = sys_cpu_to_le32(reg_value);
ret = gpio_pca_series_reg_write(dev,
PCA_REG_TYPE_1B_PULL_SELECT, (uint8_t *)&reg_value);
}
/* configure PCA_REG_TYPE_1B_PULL_ENABLE */
ret = gpio_pca_series_reg_cache_read(dev,
PCA_REG_TYPE_1B_PULL_ENABLE, (uint8_t *)&reg_value);
reg_value = sys_le32_to_cpu(reg_value);
if ((flags & GPIO_PULL_UP) || (flags & GPIO_PULL_DOWN)) {
reg_value |= (BIT(pin)); /* set bit to enable pull */
} else {
reg_value &= (~BIT(pin)); /* clear bit to disable pull */
}
reg_value = sys_cpu_to_le32(reg_value);
ret = gpio_pca_series_reg_write(dev, PCA_REG_TYPE_1B_PULL_ENABLE,
(uint8_t *)&reg_value);
}
/* configure PCA_REG_TYPE_1B_OUTPUT */
if ((flags & GPIO_OUTPUT_INIT_HIGH) || (flags & GPIO_OUTPUT_INIT_LOW)) {
uint32_t out_old;
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
/* get output register old value from reg cache */
ret = gpio_pca_series_reg_cache_read(dev, PCA_REG_TYPE_1B_OUTPUT_PORT,
(uint8_t *)&out_old);
if (ret) {
ret = -EINVAL; /* should never fail */
goto out;
}
out_old = sys_le32_to_cpu(out_old);
#else /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
out_old = gpio_pca_series_reg_cache_mini_get(dev)->output;
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
if (flags & GPIO_OUTPUT_INIT_HIGH) {
reg_value = out_old | (BIT(pin));
}
if (flags & GPIO_OUTPUT_INIT_LOW) {
reg_value = out_old & (~BIT(pin));
}
reg_value = sys_cpu_to_le32(reg_value);
ret = gpio_pca_series_reg_write(dev, PCA_REG_TYPE_1B_OUTPUT_PORT,
(uint8_t *)&reg_value);
if (ret != 0) {
goto out;
}
#ifndef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
/** update output register old value to void* cache raw value */
gpio_pca_series_reg_cache_mini_get(dev)->output =
sys_le32_to_cpu(reg_value);
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
}
/* configure PCA_REG_TYPE_1B_CONFIGURATION */
ret = gpio_pca_series_reg_cache_read(dev,
PCA_REG_TYPE_1B_CONFIGURATION, (uint8_t *)&reg_value);
reg_value = sys_le32_to_cpu(reg_value);
if (flags & GPIO_INPUT) {
reg_value |= (BIT(pin)); /* set bit to set input */
} else {
reg_value &= (~BIT(pin)); /* clear bit to set output */
}
reg_value = sys_cpu_to_le32(reg_value);
ret = gpio_pca_series_reg_write(dev,
PCA_REG_TYPE_1B_CONFIGURATION, (uint8_t *)&reg_value);
out:
k_sem_give(&data->lock);
LOG_DBG("dev %s configure return %d", dev->name, ret);
return ret;
}
/**
* @brief read gpio port
*
* @note read input_port register will clear interrupt masks
* on supported devices. This API is used for part no
* without PCA_HAS_INT_EXTEND capability.
*
* @param dev
* @param value
* @return int 0 if success
* -EWOULDBLOCK if called from ISR context
*/
static int gpio_pca_series_port_read_standard(
const struct device *dev, gpio_port_value_t *value)
{
struct gpio_pca_series_data *data = dev->data;
uint32_t input_data;
int ret = 0;
/* Can't do I2C bus operations from an ISR */
if (k_is_in_isr()) {
return -EWOULDBLOCK;
}
LOG_DBG("dev %s standard_read", dev->name);
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
gpio_pca_series_interrupt_handler_standard(dev, value);
ARG_UNUSED(data);
ARG_UNUSED(input_data);
#else
k_sem_take(&data->lock, K_FOREVER);
/* Read Input Register */
ret = gpio_pca_series_reg_read(dev,
PCA_REG_TYPE_1B_INPUT_PORT, (uint8_t *)&input_data);
if (ret) {
LOG_ERR("port read error %d", ret);
} else {
value = sys_le32_to_cpu(input_data);
}
k_sem_give(&data->lock);
#endif /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
LOG_DBG("dev %s standard_read return %d result 0x%8.8x",
dev->name, ret, (uint32_t) *value);
return ret;
}
/**
* @brief read gpio port
*
* @note This API is used for part no with PCA_HAS_INT_EXTEND capability.
* It read input_status register, which will NOT clear interrupt masks.
*
* @return int 0 if success
* -EWOULDBLOCK if called from ISR context
*/
static int gpio_pca_series_port_read_extended(
const struct device *dev, gpio_port_value_t *value)
{
const struct gpio_pca_series_config *cfg = dev->config;
struct gpio_pca_series_data *data = dev->data;
uint32_t input_data;
int ret = 0;
#ifdef GPIO_NXP_PCA_SERIES_DEBUG
/**
* Check the flags during runtime.
*
* The purpose is to check api assignment for developer who is adding
* new device support to this driver.
*/
const uint8_t check_flags = (PCA_HAS_LATCH | PCA_HAS_INT_MASK | PCA_HAS_INT_EXTEND);
if ((cfg->part_cfg->flags & check_flags) != check_flags) {
LOG_ERR("unsupported device trying to read gpio with extended api");
return -ENOTSUP;
}
#else
ARG_UNUSED(cfg);
#endif /* GPIO_NXP_PCA_SERIES_DEBUG */
/* Can't do I2C bus operations from an ISR */
if (k_is_in_isr()) {
return -EWOULDBLOCK;
}
LOG_DBG("dev %s extended_read", dev->name);
k_sem_take(&data->lock, K_FOREVER);
/* Read Input Status Register */
ret = gpio_pca_series_reg_read(dev, PCA_REG_TYPE_1B_INPUT_STATUS,
(uint8_t *)&input_data);
if (ret) {
LOG_ERR("port read error %d", ret);
} else {
*value = sys_le32_to_cpu(input_data);
}
k_sem_give(&data->lock);
LOG_DBG("dev %s extended_read return %d result 0x%8.8x",
dev->name, ret, (uint32_t) *value);
return ret;
}
static int gpio_pca_series_port_write(const struct device *dev,
gpio_port_pins_t mask, gpio_port_value_t value, gpio_port_value_t toggle)
{
struct gpio_pca_series_data *data = dev->data;
uint32_t out_old;
uint32_t out;
int ret = 0;
/* Can't do I2C bus operations from an ISR */
if (k_is_in_isr()) {
return -EWOULDBLOCK;
}
LOG_DBG("dev %s write mask 0x%8.8x value 0x%8.8x toggle 0x%8.8x",
dev->name, (uint32_t)mask, (uint32_t)value, (uint32_t)toggle);
k_sem_take(&data->lock, K_FOREVER);
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
/** get output register old value from reg cache */
ret = gpio_pca_series_reg_cache_read(dev, PCA_REG_TYPE_1B_OUTPUT_PORT,
(uint8_t *)&out_old);
if (ret) {
return -EINVAL; /** should never fail */
}
out_old = sys_le32_to_cpu(out_old);
#else /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
LOG_DBG("access address 0x%8.8x", (uint32_t)data->cache);
out_old = gpio_pca_series_reg_cache_mini_get(dev)->output;
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
out = ((out_old & ~mask) | (value & mask)) ^ toggle;
out = sys_cpu_to_le32(out);
ret = gpio_pca_series_reg_write(dev, PCA_REG_TYPE_1B_OUTPUT_PORT, (uint8_t *)&out);
if (ret == 0) {
#ifndef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
/** update output register old value to void* cache raw value */
gpio_pca_series_reg_cache_mini_get(dev)->output = sys_le32_to_cpu(out);
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
}
k_sem_give(&data->lock);
LOG_DBG("dev %s write return %d result 0x%8.8x", dev->name, ret, out);
return ret;
}
static int gpio_pca_series_port_set_masked(const struct device *dev, gpio_port_pins_t mask,
gpio_port_value_t value)
{
return gpio_pca_series_port_write(dev, mask, value, 0);
}
static int gpio_pca_series_port_set_bits(const struct device *dev, gpio_port_pins_t pins)
{
return gpio_pca_series_port_write(dev, pins, pins, 0);
}
static int gpio_pca_series_port_clear_bits(const struct device *dev, gpio_port_pins_t pins)
{
return gpio_pca_series_port_write(dev, pins, 0, 0);
}
static int gpio_pca_series_port_toggle_bits(const struct device *dev, gpio_port_pins_t pins)
{
return gpio_pca_series_port_write(dev, 0, 0, pins);
}
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
/**
* @brief Configure interrupt for device with software-compared interrupt edge
*
* @note This version is used by devices that does not have interrupt edge config
* (aka PCA_HAS_INT_EXTEND), and relies on software to check the edge.
* This applies to all pca(l)9xxx and pcal64xxa devices.
* This will also configure interrupt mask register if the device has it.
*
* @param dev
* @param pin
* @param mode
* @param trig
* @return int
*/
static int gpio_pca_series_pin_interrupt_configure_standard(
const struct device *dev, gpio_pin_t pin, enum gpio_int_mode mode,
enum gpio_int_trig trig)
{
const struct gpio_pca_series_config *cfg = dev->config;
struct gpio_pca_series_data *data = dev->data;
uint32_t int_rise, int_fall;
uint32_t int_mask, input_latch;
int ret = 0;
if (cfg->gpio_int.port == NULL) {
return -ENOTSUP;
}
/* Device does not support level-triggered interrupts. */
if (mode == GPIO_INT_MODE_LEVEL) {
return -ENOTSUP;
}
if (k_is_in_isr()) {
return -EWOULDBLOCK;
}
k_sem_take(&data->lock, K_FOREVER);
/**
* TODO: Only write 1 byte.
*
* The config api only configures 1 pin, so only need to write the
* modified byte. Need to create new register & cache api to provide
* single byte access.
* This applies to: pin_configure, pin_interrupt_configure
*/
/** get current interrupt config */
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
/** read from cache even if this register is not present on device */
ret = gpio_pca_series_reg_cache_read(dev, PCA_REG_TYPE_1B_INTERRUPT_RISE,
(uint8_t *)&int_rise);
if (ret) {
goto out;
}
int_rise = sys_le32_to_cpu(int_rise);
/** read from cache even if this register is not present on device */
ret = gpio_pca_series_reg_cache_read(dev, PCA_REG_TYPE_1B_INTERRUPT_FALL,
(uint8_t *)&int_fall);
if (ret) {
goto out;
}
int_fall = sys_le32_to_cpu(int_fall);
#else
int_rise = gpio_pca_series_reg_cache_mini_get(dev)->int_rise;
int_fall = gpio_pca_series_reg_cache_mini_get(dev)->int_fall;
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
if (mode == GPIO_INT_MODE_DISABLED) {
int_fall &= ~BIT(pin);
int_rise &= ~BIT(pin);
} else {
if (trig == GPIO_INT_TRIG_BOTH) {
int_fall |= BIT(pin);
int_rise |= BIT(pin);
} else if (trig == GPIO_INT_TRIG_LOW) {
int_fall |= BIT(pin);
int_rise &= ~BIT(pin);
} else if (trig == GPIO_INT_TRIG_HIGH) {
int_fall &= ~BIT(pin);
int_rise |= BIT(pin);
}
}
int_mask = int_fall | int_rise;
input_latch = ~int_mask;
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
/** read from cache even if this register is not present on device */
int_rise = sys_cpu_to_le32(int_rise);
ret = gpio_pca_series_reg_cache_update(dev, PCA_REG_TYPE_1B_INTERRUPT_RISE,
(uint8_t *)&int_rise);
if (ret) {
goto out;
}
/** read from cache even if this register is not present on device */
int_fall = sys_cpu_to_le32(int_fall);
ret = gpio_pca_series_reg_cache_update(dev, PCA_REG_TYPE_1B_INTERRUPT_FALL,
(uint8_t *)&int_fall);
if (ret) {
goto out;
}
#else
gpio_pca_series_reg_cache_mini_get(dev)->int_rise = int_rise;
gpio_pca_series_reg_cache_mini_get(dev)->int_fall = int_fall;
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
/** enable latch if available, so we do not lost interrupt */
if (cfg->part_cfg->flags & PCA_HAS_LATCH) {
input_latch = sys_cpu_to_le32(input_latch);
ret = gpio_pca_series_reg_write(dev, PCA_REG_TYPE_1B_INPUT_LATCH,
(uint8_t *)&input_latch);
if (ret) {
goto out;
}
}
/** update interrupt mask register if available */
if (cfg->part_cfg->flags & PCA_HAS_INT_MASK) {
int_mask = sys_cpu_to_le32(int_mask);
ret = gpio_pca_series_reg_write(dev, PCA_REG_TYPE_1B_INTERRUPT_MASK,
(uint8_t *)&int_mask);
if (ret) {
goto out;
}
}
out:
k_sem_give(&data->lock);
if (ret) {
LOG_ERR("int config(s) error %d", ret);
}
return ret;
}
/**
* @brief Configure interrupt for device with hardware-selected interrupt edge
*
* @note This version is used by devices that have interrupt edge config
* (aka PCA_HAS_INT_EXTEND), so interrupt only triggers on selected edge.
* This applies to all pcal65xx devices.
* This will configure interrupt mask register and interrupt edge register.
* (All devices that have PCA_HAS_INT_EXTEND flag should have PCA_HAS_INT_MASK
* flag. Otherwise, throw out error.)
*/
static int gpio_pca_series_pin_interrupt_configure_extended(
const struct device *dev,
gpio_pin_t pin, enum gpio_int_mode mode,
enum gpio_int_trig trig)
{
const struct gpio_pca_series_config *cfg = dev->config;
struct gpio_pca_series_data *data = dev->data;
uint64_t int_edge;
uint32_t int_mask, input_latch;
int ret = 0;
uint32_t edge_cfg_shift = pin << 1U;
uint64_t edge_cfg_mask = 0b11 << edge_cfg_shift;
if (cfg->gpio_int.port == NULL) {
return -ENOTSUP;
}
/* Device does not support level-triggered interrupts. */
if (mode == GPIO_INT_MODE_LEVEL) {
return -ENOTSUP;
}
#ifdef GPIO_NXP_PCA_SERIES_DEBUG
/**
* Check the flags during runtime.
*
* The purpose is to check api assignment for developer who is adding
* new device support to this driver.
*/
const uint8_t check_flags = (PCA_HAS_LATCH | PCA_HAS_INT_MASK | PCA_HAS_INT_EXTEND);
if ((cfg->part_cfg->flags & check_flags) != check_flags) {
LOG_ERR("unsupported device trying to configure interrupt with extended api");
return -ENOTSUP;
}
#endif /* GPIO_NXP_PCA_SERIES_DEBUG */
if (k_is_in_isr()) {
return -EWOULDBLOCK;
}
LOG_DBG("int cfg(e) pin %d mode %d trig %d", pin, mode, trig);
k_sem_take(&data->lock, K_FOREVER);
/**
* TODO: Only write 1 byte.
*
* The config api only configures 1 pin, so only need to write the
* modified byte. Need to create new register & cache api to provide
* single byte access.
* This applies to: pin_configure, pin_interrupt_configure
*/
/** get current interrupt edge config */
ret = gpio_pca_series_reg_cache_read(dev, PCA_REG_TYPE_2B_INTERRUPT_EDGE,
(uint8_t *)&int_edge);
if (ret) {
LOG_ERR("get current interrupt edge config fail [%d]", ret);
goto out;
}
int_edge = sys_le64_to_cpu(int_edge);
ret = gpio_pca_series_reg_cache_read(dev, PCA_REG_TYPE_1B_INTERRUPT_MASK,
(uint8_t *)&int_mask);
if (ret) {
goto out;
}
int_mask = sys_le32_to_cpu(int_mask);
if (mode == GPIO_INT_MODE_DISABLED) {
int_mask |= BIT(pin); /** set 1 to disable interrupt */
} else {
if (trig == GPIO_INT_TRIG_BOTH) {
int_edge = (int_edge & (~edge_cfg_mask)) |
(PCA_INTERRUPT_EITHER_EDGE << edge_cfg_shift);
} else if (trig == GPIO_INT_TRIG_LOW) {
int_edge = (int_edge & (~edge_cfg_mask)) |
(PCA_INTERRUPT_FALLING_EDGE << edge_cfg_shift);
} else if (trig == GPIO_INT_TRIG_HIGH) {
int_edge = (int_edge & (~edge_cfg_mask)) |
(PCA_INTERRUPT_RISING_EDGE << edge_cfg_shift);
}
int_mask &= ~BIT(pin); /** set 0 to enable interrupt */
}
/** update interrupt edge config */
int_edge = sys_cpu_to_le64(int_edge);
ret = gpio_pca_series_reg_write(dev, PCA_REG_TYPE_2B_INTERRUPT_EDGE,
(uint8_t *)&int_edge);
if (ret) {
goto out;
}
/** enable latch, so we do not lost interrupt */
input_latch = ~int_mask;
input_latch = sys_cpu_to_le32(input_latch);
ret = gpio_pca_series_reg_write(dev, PCA_REG_TYPE_1B_INPUT_LATCH,
(uint8_t *)&input_latch);
if (ret) {
goto out;
}
/** update interrupt mask register */
int_mask = sys_cpu_to_le32(int_mask);
ret = gpio_pca_series_reg_write(dev, PCA_REG_TYPE_1B_INTERRUPT_MASK,
(uint8_t *)&int_mask);
if (ret) {
goto out;
}
out:
k_sem_give(&data->lock);
return ret;
}
static int gpio_pca_series_manage_callback(const struct device *dev,
struct gpio_callback *callback, bool set)
{
struct gpio_pca_series_data *data = dev->data;
return gpio_manage_callback(&data->callbacks, callback, set);
}
static void gpio_pca_series_interrupt_handler_standard(const struct device *dev,
gpio_port_value_t *input_value)
{
struct gpio_pca_series_data *data = dev->data;
int ret = 0;
uint32_t input_old = 0, int_rise = 0, int_fall = 0;
uint32_t input = 0;
uint32_t transitioned_pins = 0;
uint32_t int_status = 0;
k_sem_take(&data->lock, K_FOREVER);
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
/** read from cache even if this register is not present on device */
ret = gpio_pca_series_reg_cache_read(dev, PCA_REG_TYPE_1B_INPUT_HISTORY,
(uint8_t *)&input_old);
if (ret) {
goto out;
}
input_old = sys_le32_to_cpu(input_old);
/** read from cache even if this register is not present on device */
ret = gpio_pca_series_reg_cache_read(dev, PCA_REG_TYPE_1B_INTERRUPT_RISE,
(uint8_t *)&int_rise);
if (ret) {
goto out;
}
int_rise = sys_le32_to_cpu(int_rise);
/** read from cache even if this register is not present on device */
ret = gpio_pca_series_reg_cache_read(dev, PCA_REG_TYPE_1B_INTERRUPT_FALL,
(uint8_t *)&int_fall);
if (ret) {
goto out;
}
int_fall = sys_le32_to_cpu(int_fall);
#else
input_old = gpio_pca_series_reg_cache_mini_get(dev)->input_old;
int_rise = gpio_pca_series_reg_cache_mini_get(dev)->int_rise;
int_fall = gpio_pca_series_reg_cache_mini_get(dev)->int_fall;
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
/** check if any interrupt enabled */
if ((!int_rise) && (!int_fall)) {
goto out;
}
/** read current input value, and clear status if reg is present */
ret = gpio_pca_series_reg_read(dev, PCA_REG_TYPE_1B_INPUT_PORT, (uint8_t *)&input);
if (ret) {
goto out;
}
input = sys_le32_to_cpu(input);
/** compare input to input_old to get transitioned_pins */
transitioned_pins = input_old ^ input;
/** Mask gpio transactions with rising/falling edge interrupt config */
int_status = (int_rise & transitioned_pins & input)
| (int_fall & transitioned_pins & (~input));
/** update current input to cache */
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
uint32_t input_le = sys_cpu_to_le32(input);
ret = gpio_pca_series_reg_cache_update(dev, PCA_REG_TYPE_1B_INPUT_HISTORY,
(uint8_t *)&input_le);
#else
gpio_pca_series_reg_cache_mini_get(dev)->input_old = input;
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
out:
k_sem_give(&data->lock);
if (input_value) {
*input_value = input;
}
if ((ret == 0) && (int_status)) {
gpio_fire_callbacks(&data->callbacks, dev, int_status);
}
}
static void gpio_pca_series_interrupt_handler_extended(const struct device *dev)
{
const struct gpio_pca_series_config *cfg = dev->config;
struct gpio_pca_series_data *data = dev->data;
int ret = 0;
uint32_t int_status = 0;
#ifdef GPIO_NXP_PCA_SERIES_DEBUG
/**
* Check the flags during runtime.
*
* The purpose is to check api assignment for developer who is adding
* new device support to this driver.
*/
const uint8_t check_flags = (PCA_HAS_LATCH | PCA_HAS_INT_MASK | PCA_HAS_INT_EXTEND);
if ((cfg->part_cfg->flags & check_flags) != check_flags) {
LOG_ERR("unsupported device trying to read gpio with extended api");
return;
}
#else
ARG_UNUSED(cfg);
#endif /* GPIO_NXP_PCA_SERIES_DEBUG */
LOG_DBG("enter int handler(e)");
k_sem_take(&data->lock, K_FOREVER);
/** get transitioned_pins from interrupt_status register */
ret = gpio_pca_series_reg_read(dev, PCA_REG_TYPE_1B_INTERRUPT_STATUS,
(uint8_t *)&int_status);
if (ret) {
goto out;
}
/** clear status */
ret = gpio_pca_series_reg_write(dev, PCA_REG_TYPE_1B_INTERRUPT_CLEAR,
(uint8_t *)&int_status);
if (ret) {
goto out;
}
out:
k_sem_give(&data->lock);
if ((ret == 0) && (int_status)) {
int_status = sys_le32_to_cpu(int_status);
gpio_fire_callbacks(&data->callbacks, dev, int_status);
}
}
static void gpio_pca_series_interrupt_worker_standard(struct k_work *work)
{
struct gpio_pca_series_data *data =
CONTAINER_OF(work, struct gpio_pca_series_data, int_work);
const struct device *dev = data->self;
gpio_pca_series_interrupt_handler_standard(dev, NULL);
}
static void gpio_pca_series_interrupt_worker_extended(struct k_work *work)
{
struct gpio_pca_series_data *data =
CONTAINER_OF(work, struct gpio_pca_series_data, int_work);
const struct device *dev = data->self;
gpio_pca_series_interrupt_handler_extended(dev);
}
static void gpio_pca_series_gpio_int_handler(const struct device *dev,
struct gpio_callback *gpio_cb, uint32_t pins)
{
ARG_UNUSED(dev);
ARG_UNUSED(pins);
LOG_DBG("gpio_int trigger");
struct gpio_pca_series_data *data =
CONTAINER_OF(gpio_cb, struct gpio_pca_series_data, gpio_cb);
k_work_submit(&data->int_work);
}
#endif /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
/**
* }
* gpio_pca_zephyr_gpio_api
*/
static DEVICE_API(gpio, gpio_pca_series_api_funcs_standard) = {
.pin_configure = gpio_pca_series_pin_configure,
.port_get_raw = gpio_pca_series_port_read_standard,
.port_set_masked_raw = gpio_pca_series_port_set_masked,
.port_set_bits_raw = gpio_pca_series_port_set_bits,
.port_clear_bits_raw = gpio_pca_series_port_clear_bits,
.port_toggle_bits = gpio_pca_series_port_toggle_bits,
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
.pin_interrupt_configure = gpio_pca_series_pin_interrupt_configure_standard,
.manage_callback = gpio_pca_series_manage_callback,
#endif
};
static DEVICE_API(gpio, gpio_pca_series_api_funcs_extended) = {
.pin_configure = gpio_pca_series_pin_configure,
.port_get_raw = gpio_pca_series_port_read_extended, /* special version used */
.port_set_masked_raw = gpio_pca_series_port_set_masked,
.port_set_bits_raw = gpio_pca_series_port_set_bits,
.port_clear_bits_raw = gpio_pca_series_port_clear_bits,
.port_toggle_bits = gpio_pca_series_port_toggle_bits,
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
.pin_interrupt_configure = gpio_pca_series_pin_interrupt_configure_extended,
.manage_callback = gpio_pca_series_manage_callback,
#endif
};
/**
* @brief Initialization function of pca_series
*
* This sets initial input/ output configuration and output states.
* The interrupt is configured if this is enabled.
*
* @param dev Device struct
* @return 0 if successful, failed otherwise.
*/
static int gpio_pca_series_init(const struct device *dev)
{
const struct gpio_pca_series_config *cfg = dev->config;
struct gpio_pca_series_data *data = dev->data;
int ret = 0;
if (!device_is_ready(cfg->i2c.bus)) {
LOG_ERR("i2c bus device not found");
goto out_bus;
}
#ifdef GPIO_NXP_PCA_SERIES_DEBUG
# ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
gpio_pca_series_cache_test(dev);
# endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
#endif /* GPIO_NXP_PCA_SERIES_DEBUG */
/** Set cache to initial state */
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
ret = gpio_pca_series_reg_cache_reset(dev);
#else
ret = gpio_pca_series_reg_cache_mini_reset(dev);
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
if (ret) {
LOG_ERR("cache init error %d", ret);
goto out;
}
LOG_DBG("cache init done");
/** device reset */
gpio_pca_series_reset(dev);
LOG_DBG("device reset done");
/** configure interrupt */
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
/** save dev pointer */
data->self = dev;
/** check the flags and init work obj */
const uint8_t check_flags = (PCA_HAS_LATCH | PCA_HAS_INT_MASK | PCA_HAS_INT_EXTEND);
if ((cfg->part_cfg->flags & check_flags) == check_flags) {
k_work_init(&data->int_work, gpio_pca_series_interrupt_worker_extended);
} else {
k_work_init(&data->int_work, gpio_pca_series_interrupt_worker_standard);
}
/** Interrupt pin connected, enable interrupt */
if (cfg->gpio_int.port != NULL) {
if (!device_is_ready(cfg->gpio_int.port)) {
LOG_ERR("Cannot get pointer to gpio interrupt device");
ret = -EINVAL;
goto out;
}
ret = gpio_pin_configure_dt(&cfg->gpio_int, GPIO_INPUT);
if (ret) {
goto out;
}
ret = gpio_pin_interrupt_configure_dt(&cfg->gpio_int, GPIO_INT_EDGE_TO_ACTIVE);
if (ret) {
goto out;
}
gpio_init_callback(&data->gpio_cb, gpio_pca_series_gpio_int_handler,
BIT(cfg->gpio_int.pin));
ret = gpio_add_callback(cfg->gpio_int.port, &data->gpio_cb);
} else {
LOG_WRN("pca interrupt enabled w/o int-gpios configured in dts");
}
#else
ARG_UNUSED(data);
#endif /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
out:
#ifdef GPIO_NXP_PCA_SERIES_DEBUG
gpio_pca_series_debug_dump(dev);
#endif /* GPIO_NXP_PCA_SERIES_DEBUG */
out_bus:
if (ret) {
LOG_ERR("%s init failed: %d", dev->name, ret);
} else {
LOG_INF("%s init ok", dev->name);
}
return ret;
}
/**
* @brief get device description by part_no
*/
#define GPIO_PCA_GET_API_BY_PART_NO(part_no) ( \
(part_no == PCA_PART_NO_PCAL6524) ? &gpio_pca_series_api_funcs_extended : \
(part_no == PCA_PART_NO_PCAL6534) ? &gpio_pca_series_api_funcs_extended : \
&gpio_pca_series_api_funcs_standard \
)
#define GPIO_PCA_GET_PORT_NO_CFG_BY_PART_NO(part_no) (GPIO_PCA_PORT_NO_##part_no)
#define GPIO_PCA_GET_PART_FLAG_BY_PART_NO(part_no) (GPIO_PCA_FLAG_##part_no)
#define GPIO_PCA_GET_PART_CFG_BY_PART_NO(part_no) (GPIO_PCA_PART_CFG_##part_no)
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
/** Cache size increment by feature flags */
#define PCA_REG_HAS_LATCH (3U) /* +2b_drive_strength, +1b_input_latch */
#define PCA_REG_HAS_PULL (2U) /* +1b_pull_enable, +1b_pull_select */
#define PCA_REG_HAS_OUT_CONFIG (1U) /* +1b_output_config */
#define GPIO_PCA_GET_CACHE_SIZE_BY_PART_NO_NO_INT(part_no) (( \
2U /* basic: +output_port, +configuration */ \
+ ((GPIO_PCA_GET_PART_FLAG_BY_PART_NO(part_no) & PCA_HAS_LATCH) ? \
PCA_REG_HAS_LATCH : 0U) \
+ ((GPIO_PCA_GET_PART_FLAG_BY_PART_NO(part_no) & PCA_HAS_PULL) ? \
PCA_REG_HAS_PULL : 0U) \
+ ((GPIO_PCA_GET_PART_FLAG_BY_PART_NO(part_no) & PCA_HAS_OUT_CONFIG) ? \
PCA_REG_HAS_OUT_CONFIG : 0U) \
) * GPIO_PCA_GET_PORT_NO_CFG_BY_PART_NO(part_no) \
)
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
/** Cache size increment by feature flags (continued) */
#define PCA_REG_HAS_INT_EXTEND (3U) /* true: +2b_interrupt_edge, +1b_interrupt_mask */
#define PCA_REG_NO_INT_EXTEND (3U) /* false: +1b_input_history, +1b_interrupt_rise,
* +1b_interrupt_fall
*/
/**
* registers:
* 1b_input_port
* - present on all devices
* - not used if PCA_HAS_OUT_CONFIG
* - non-cacheable
* 1b_output_port
* - present on all devices
* - cacheable
* 1b_configuration
* - present on all devices
* - cacheable
* 2b_output_drive_strength
* - present if PCA_HAS_LATCH
* - cacheable if present
* 1b_input_latch
* - present if PCA_HAS_LATCH
* - non-cacheable
* 1b_pull_enable
* - present if PCA_HAS_PULL
* - cacheable if present
* 1b_pull_select
* - present if PCA_HAS_PULL
* - cacheable if present
* 1b_input_status
* - present if PCA_HAS_OUT_CONFIG
* - replaces 1b_input_port if present
* - non-cacheable
* 1b_output_config
* - present if PCA_HAS_OUT_CONFIG
* - cacheable if present
* 1b_interrupt_mask
* - present if PCA_HAS_INT_MASK
* - not present by default
* - cacheable if PCA_HAS_INT_EXTEND
* 1b_interrupt_status
* - present if PCA_HAS_INT_MASK
* - not used if not PCA_HAS_INT_EXTEND
* - read only
* - non-cacheable
* 2b_interrupt_edge
* - present if PCA_HAS_INT_EXTEND
* - cacheable if present
* 1b_interrupt_clear
* - present if PCA_HAS_INT_EXTEND
* - write only
* - non-cacheable
* 1b_input_history
* - not present on all devices (fake cache)
* - store last input value
* - cacheable (present) if not PCA_HAS_INT_EXTEND
* 1b_interrupt_rise
* - not present on all devices (fake cache)
* - store pins interrupt on rising edge
* - cacheable (present) if not PCA_HAS_INT_EXTEND
* 1b_interrupt_fall
* - not present on all devices (fake cache)
* - store pins interrupt on falling edge
* - cacheable (present) if not PCA_HAS_INT_EXTEND
*/
#define GPIO_PCA_GET_CACHE_SIZE_BY_PART_NO(part_no) ( \
GPIO_PCA_GET_CACHE_SIZE_BY_PART_NO_NO_INT(part_no) \
+ (((GPIO_PCA_GET_PART_FLAG_BY_PART_NO(part_no) & PCA_HAS_INT_EXTEND) ? \
PCA_REG_HAS_INT_EXTEND : PCA_REG_NO_INT_EXTEND) \
) * GPIO_PCA_GET_PORT_NO_CFG_BY_PART_NO(part_no) \
)
#else /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
#define GPIO_PCA_GET_CACHE_SIZE_BY_PART_NO(part_no) ( \
GPIO_PCA_GET_CACHE_SIZE_BY_PART_NO_NO_INT(part_no) \
)
#endif /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
/**
* @brief implement pca953x driver
*
* @note flags = 0U;
*
* api set : standard
* ngpios : 8, 16
* part_no : pca9534 pca9538 pca9535 pca9539
*/
#define GPIO_PCA_SERIES_FLAG_TYPE_0 (0U)
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
/**
* cache map for flag = 0U
*/
static const uint8_t gpio_pca_series_cache_map_pca953x[] = {
PCA_REG_INVALID, /** input_port if not PCA_HAS_OUT_CONFIG, non-cacheable */
0x00, /** output_port */
/* 0x02, polarity_inversion (unused, omitted) */
0x01, /** configuration */
PCA_REG_INVALID, /** 2b_output_drive_strength if PCA_HAS_LATCH*/
PCA_REG_INVALID, /** input_latch if PCA_HAS_LATCH*/
PCA_REG_INVALID, /** pull_enable if PCA_HAS_PULL */
PCA_REG_INVALID, /** pull_select if PCA_HAS_PULL */
PCA_REG_INVALID, /** input_status if PCA_HAS_OUT_CONFIG, non-cacheable */
PCA_REG_INVALID, /** output_config if PCA_HAS_OUT_CONFIG */
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
PCA_REG_INVALID, /** interrupt_mask if PCA_HAS_INT_MASK,
* non-cacheable if not PCA_HAS_INT_EXTEND
*/
PCA_REG_INVALID, /** int_status if PCA_HAS_INT_MASK, non-cacheable */
PCA_REG_INVALID, /** 2b_interrupt_edge if PCA_HAS_INT_EXTEND */
PCA_REG_INVALID, /** interrupt_clear if PCA_HAS_INT_EXTEND, non-cacheable */
# ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
0x02, /** 1b_input_history if PCA_HAS_LATCH and not PCA_HAS_INT_EXTEND */
0x03, /** 1b_interrupt_rise if PCA_HAS_LATCH and not PCA_HAS_INT_EXTEND */
0x04, /** 1b_interrupt_fall if PCA_HAS_LATCH and not PCA_HAS_INT_EXTEND */
# endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
#endif /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
};
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
static const uint8_t gpio_pca_series_reg_pca9538[] = {
0x00, /** input_port if not PCA_HAS_OUT_CONFIG, non-cacheable */
0x01, /** output_port */
/* 0x02, polarity_inversion (unused, omitted) */
0x03, /** configuration */
PCA_REG_INVALID, /** 2b_output_drive_strength if PCA_HAS_LATCH*/
PCA_REG_INVALID, /** input_latch if PCA_HAS_LATCH*/
PCA_REG_INVALID, /** pull_enable if PCA_HAS_PULL */
PCA_REG_INVALID, /** pull_select if PCA_HAS_PULL */
PCA_REG_INVALID, /** input_status if PCA_HAS_OUT_CONFIG, non-cacheable */
PCA_REG_INVALID, /** output_config if PCA_HAS_OUT_CONFIG */
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
PCA_REG_INVALID, /** interrupt_mask if PCA_HAS_INT_MASK,
* non-cacheable if not PCA_HAS_INT_EXTEND
*/
PCA_REG_INVALID, /** int_status if PCA_HAS_INT_MASK */
PCA_REG_INVALID, /** 2b_interrupt_edge if PCA_HAS_INT_EXTEND */
PCA_REG_INVALID, /** interrupt_clear if PCA_HAS_INT_EXTEND, non-cacheable */
# ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
PCA_REG_INVALID, /** 1b_input_history if PCA_HAS_LATCH and not PCA_HAS_INT_EXTEND */
PCA_REG_INVALID, /** 1b_interrupt_rise if PCA_HAS_LATCH and not PCA_HAS_INT_EXTEND */
PCA_REG_INVALID, /** 1b_interrupt_fall if PCA_HAS_LATCH and not PCA_HAS_INT_EXTEND */
# endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
#endif /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
};
#define GPIO_PCA_PORT_NO_PCA_PART_NO_PCA9538 (1U)
#define GPIO_PCA_FLAG_PCA_PART_NO_PCA9538 GPIO_PCA_SERIES_FLAG_TYPE_0
#define GPIO_PCA_PART_CFG_PCA_PART_NO_PCA9538 (&gpio_pca_series_part_cfg_pca9538)
const struct gpio_pca_series_part_config gpio_pca_series_part_cfg_pca9538 = {
.port_no = GPIO_PCA_PORT_NO_PCA_PART_NO_PCA9538,
.flags = GPIO_PCA_FLAG_PCA_PART_NO_PCA9538,
.regs = gpio_pca_series_reg_pca9538,
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
# ifdef GPIO_NXP_PCA_SERIES_DEBUG
.cache_size = GPIO_PCA_GET_CACHE_SIZE_BY_PART_NO(PCA_PART_NO_PCA9538),
# endif /* GPIO_NXP_PCA_SERIES_DEBUG */
.cache_map = gpio_pca_series_cache_map_pca953x,
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
};
/**
* pca9555 share the same register layout with pca9539, with
* RESET pin repurposed to another address strapping pin.
* no difference from driver perspective.
*/
#define GPIO_PCA_PORT_NO_PCA_PART_NO_PCA9554 GPIO_PCA_PORT_NO_PCA_PART_NO_PCA9538
#define GPIO_PCA_FLAG_PCA_PART_NO_PCA9554 GPIO_PCA_FLAG_PCA_PART_NO_PCA9538
#define GPIO_PCA_PART_CFG_PCA_PART_NO_PCA9554 (&gpio_pca_series_part_cfg_pca9554)
const struct gpio_pca_series_part_config gpio_pca_series_part_cfg_pca9554 = {
.port_no = GPIO_PCA_PORT_NO_PCA_PART_NO_PCA9554,
.flags = GPIO_PCA_FLAG_PCA_PART_NO_PCA9554,
.regs = gpio_pca_series_reg_pca9538,
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
# ifdef GPIO_NXP_PCA_SERIES_DEBUG
.cache_size = GPIO_PCA_GET_CACHE_SIZE_BY_PART_NO(PCA_PART_NO_PCA9554),
# endif /* GPIO_NXP_PCA_SERIES_DEBUG */
.cache_map = gpio_pca_series_cache_map_pca953x,
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
};
static const uint8_t gpio_pca_series_reg_pca9539[] = {
0x00, /** input_port if not PCA_HAS_OUT_CONFIG, non-cacheable */
0x02, /** output_port */
/* 0x04, polarity_inversion (unused, omitted) */
0x06, /** configuration */
PCA_REG_INVALID, /** 2b_output_drive_strength if PCA_HAS_LATCH*/
PCA_REG_INVALID, /** input_latch if PCA_HAS_LATCH*/
PCA_REG_INVALID, /** pull_enable if PCA_HAS_PULL */
PCA_REG_INVALID, /** pull_select if PCA_HAS_PULL */
PCA_REG_INVALID, /** input_status if PCA_HAS_OUT_CONFIG, non-cacheable */
PCA_REG_INVALID, /** output_config if PCA_HAS_OUT_CONFIG */
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
PCA_REG_INVALID, /** interrupt_mask if PCA_HAS_INT_MASK,
* non-cacheable if not PCA_HAS_INT_EXTEND
*/
PCA_REG_INVALID, /** int_status if PCA_HAS_INT_MASK */
PCA_REG_INVALID, /** 2b_interrupt_edge if PCA_HAS_INT_EXTEND */
PCA_REG_INVALID, /** interrupt_clear if PCA_HAS_INT_EXTEND, non-cacheable */
# ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
PCA_REG_INVALID, /** 1b_input_history if PCA_HAS_LATCH and not PCA_HAS_INT_EXTEND */
PCA_REG_INVALID, /** 1b_interrupt_rise if PCA_HAS_LATCH and not PCA_HAS_INT_EXTEND */
PCA_REG_INVALID, /** 1b_interrupt_fall if PCA_HAS_LATCH and not PCA_HAS_INT_EXTEND */
# endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
#endif /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
};
#define GPIO_PCA_PORT_NO_PCA_PART_NO_PCA9539 (2U)
#define GPIO_PCA_FLAG_PCA_PART_NO_PCA9539 GPIO_PCA_SERIES_FLAG_TYPE_0
#define GPIO_PCA_PART_CFG_PCA_PART_NO_PCA9539 (&gpio_pca_series_part_cfg_pca9539)
const struct gpio_pca_series_part_config gpio_pca_series_part_cfg_pca9539 = {
.port_no = GPIO_PCA_PORT_NO_PCA_PART_NO_PCA9539,
.flags = GPIO_PCA_FLAG_PCA_PART_NO_PCA9539,
.regs = gpio_pca_series_reg_pca9539,
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
# ifdef GPIO_NXP_PCA_SERIES_DEBUG
.cache_size = GPIO_PCA_GET_CACHE_SIZE_BY_PART_NO(PCA_PART_NO_PCA9539),
# endif /* GPIO_NXP_PCA_SERIES_DEBUG */
.cache_map = gpio_pca_series_cache_map_pca953x,
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
};
/**
* pca9555 share the same register layout with pca9539, with
* RESET pin repurposed to another address strapping pin.
* no difference from driver perspective.
*/
#define GPIO_PCA_PORT_NO_PCA_PART_NO_PCA9555 GPIO_PCA_PORT_NO_PCA_PART_NO_PCA9539
#define GPIO_PCA_FLAG_PCA_PART_NO_PCA9555 GPIO_PCA_FLAG_PCA_PART_NO_PCA9539
#define GPIO_PCA_PART_CFG_PCA_PART_NO_PCA9555 (&gpio_pca_series_part_cfg_pca9555)
const struct gpio_pca_series_part_config gpio_pca_series_part_cfg_pca9555 = {
.port_no = GPIO_PCA_PORT_NO_PCA_PART_NO_PCA9555,
.flags = GPIO_PCA_FLAG_PCA_PART_NO_PCA9555,
.regs = gpio_pca_series_reg_pca9539,
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
# ifdef GPIO_NXP_PCA_SERIES_DEBUG
.cache_size = GPIO_PCA_GET_CACHE_SIZE_BY_PART_NO(PCA_PART_NO_PCA9555),
# endif /* GPIO_NXP_PCA_SERIES_DEBUG */
.cache_map = gpio_pca_series_cache_map_pca953x,
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
};
/**
* @brief implement pcal65xx driver
*
* @note flags = PCA_HAS_LATCH
* | PCA_HAS_PULL
* | PCA_HAS_INT_MASK
* | PCA_HAS_INT_EXTEND
* | PCA_HAS_OUT_CONFIG
*
* api set : pcal65xx
* ngpios : 24, 32
* part_no : pcal6524 pcal6534
*/
#define GPIO_PCA_SERIES_FLAG_TYPE_3 (PCA_HAS_LATCH | PCA_HAS_PULL | PCA_HAS_INT_MASK \
| PCA_HAS_INT_EXTEND | PCA_HAS_OUT_CONFIG)
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
/**
* cache map for flag = PCA_HAS_LATCH
* | PCA_HAS_PULL
* | PCA_HAS_INT_MASK
* | PCA_HAS_INT_EXTEND
* | PCA_HAS_OUT_CONFIG
*/
static const uint8_t gpio_pca_series_cache_map_pcal65xx[] = {
PCA_REG_INVALID, /** input_port if not PCA_HAS_OUT_CONFIG, non-cacheable */
0x00, /** output_port */
/* 0x02, polarity_inversion (unused, omitted) */
0x01, /** configuration */
0x02, /** 2b_output_drive_strength if PCA_HAS_LATCH*/
0x04, /** input_latch if PCA_HAS_LATCH*/
0x05, /** pull_enable if PCA_HAS_PULL */
0x06, /** pull_select if PCA_HAS_PULL */
PCA_REG_INVALID, /** input_status if PCA_HAS_OUT_CONFIG, non-cacheable */
0x07, /** output_config if PCA_HAS_OUT_CONFIG */
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
0x08, /** interrupt_mask if PCA_HAS_INT_MASK,
* non-cacheable if not PCA_HAS_INT_EXTEND
*/
PCA_REG_INVALID, /** int_status if PCA_HAS_INT_MASK, non-cacheable */
0x09, /** 2b_interrupt_edge if PCA_HAS_INT_EXTEND */
PCA_REG_INVALID, /** interrupt_clear if PCA_HAS_INT_EXTEND, non-cacheable */
# ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
PCA_REG_INVALID, /** 1b_input_history if PCA_HAS_LATCH and not PCA_HAS_INT_EXTEND */
PCA_REG_INVALID, /** 1b_interrupt_rise if PCA_HAS_LATCH and not PCA_HAS_INT_EXTEND */
PCA_REG_INVALID, /** 1b_interrupt_fall if PCA_HAS_LATCH and not PCA_HAS_INT_EXTEND */
# endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
#endif /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
};
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
static const uint8_t gpio_pca_series_reg_pcal6524[] = {
PCA_REG_INVALID, /** input_port if not PCA_HAS_OUT_CONFIG, non-cacheable */
0x04, /** output_port */
/* 0x08, polarity_inversion (unused, omitted) */
0x0c, /** configuration */
0x40, /** 2b_output_drive_strength if PCA_HAS_LATCH*/
0x48, /** input_latch if PCA_HAS_LATCH*/
0x4c, /** pull_enable if PCA_HAS_PULL */
0x50, /** pull_select if PCA_HAS_PULL */
0x6c, /** input_status if PCA_HAS_OUT_CONFIG, non-cacheable */
0x70, /** output_config if PCA_HAS_OUT_CONFIG */
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
0x54, /** interrupt_mask if PCA_HAS_INT_MASK,
* non-cacheable if not PCA_HAS_INT_EXTEND
*/
0x58, /** int_status if PCA_HAS_INT_MASK */
0x60, /** 2b_interrupt_edge if PCA_HAS_INT_EXTEND */
0x68, /** interrupt_clear if PCA_HAS_INT_EXTEND, non-cacheable */
# ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
PCA_REG_INVALID, /** 1b_input_history if PCA_HAS_LATCH and not PCA_HAS_INT_EXTEND */
PCA_REG_INVALID, /** 1b_interrupt_rise if PCA_HAS_LATCH and not PCA_HAS_INT_EXTEND */
PCA_REG_INVALID, /** 1b_interrupt_fall if PCA_HAS_LATCH and not PCA_HAS_INT_EXTEND */
# endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
#endif /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
};
#define GPIO_PCA_PORT_NO_PCA_PART_NO_PCAL6524 (3U)
#define GPIO_PCA_FLAG_PCA_PART_NO_PCAL6524 GPIO_PCA_SERIES_FLAG_TYPE_3
#define GPIO_PCA_PART_CFG_PCA_PART_NO_PCAL6524 (&gpio_pca_series_part_cfg_pcal6524)
const struct gpio_pca_series_part_config gpio_pca_series_part_cfg_pcal6524 = {
.port_no = GPIO_PCA_PORT_NO_PCA_PART_NO_PCAL6524,
.flags = GPIO_PCA_FLAG_PCA_PART_NO_PCAL6524,
.regs = gpio_pca_series_reg_pcal6524,
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
# ifdef GPIO_NXP_PCA_SERIES_DEBUG
.cache_size = GPIO_PCA_GET_CACHE_SIZE_BY_PART_NO(PCA_PART_NO_PCAL6524),
# endif /* GPIO_NXP_PCA_SERIES_DEBUG */
.cache_map = gpio_pca_series_cache_map_pcal65xx,
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
};
static const uint8_t gpio_pca_series_reg_pcal6534[] = {
PCA_REG_INVALID, /** input_port if not PCA_HAS_OUT_CONFIG, non-cacheable */
0x04, /** output_port */
/* 0x08, polarity_inversion (unused, omitted) */
0x0c, /** configuration */
0x40, /** 2b_output_drive_strength if PCA_HAS_LATCH*/
0x48, /** input_latch if PCA_HAS_LATCH*/
0x4c, /** pull_enable if PCA_HAS_PULL */
0x50, /** pull_select if PCA_HAS_PULL */
0x6c, /** input_status if PCA_HAS_OUT_CONFIG, non-cacheable */
0x70, /** output_config if PCA_HAS_OUT_CONFIG */
#ifdef CONFIG_GPIO_PCA_SERIES_INTERRUPT
0x54, /** interrupt_mask if PCA_HAS_INT_MASK,
* non-cacheable if not PCA_HAS_INT_EXTEND
*/
0x58, /** int_status if PCA_HAS_INT_MASK */
0x60, /** 2b_interrupt_edge if PCA_HAS_INT_EXTEND */
0x68, /** interrupt_clear if PCA_HAS_INT_EXTEND, non-cacheable */
# ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
PCA_REG_INVALID, /** 1b_input_history if PCA_HAS_LATCH and not PCA_HAS_INT_EXTEND */
PCA_REG_INVALID, /** 1b_interrupt_rise if PCA_HAS_LATCH and not PCA_HAS_INT_EXTEND */
PCA_REG_INVALID, /** 1b_interrupt_fall if PCA_HAS_LATCH and not PCA_HAS_INT_EXTEND */
# endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
#endif /* CONFIG_GPIO_PCA_SERIES_INTERRUPT */
};
#define GPIO_PCA_PORT_NO_PCA_PART_NO_PCAL6534 (4U)
#define GPIO_PCA_FLAG_PCA_PART_NO_PCAL6534 GPIO_PCA_SERIES_FLAG_TYPE_3
#define GPIO_PCA_PART_CFG_PCA_PART_NO_PCAL6534 (&gpio_pca_series_part_cfg_pcal6534)
const struct gpio_pca_series_part_config gpio_pca_series_part_cfg_pcal6534 = {
.port_no = GPIO_PCA_PORT_NO_PCA_PART_NO_PCAL6534,
.flags = GPIO_PCA_FLAG_PCA_PART_NO_PCAL6534,
.regs = gpio_pca_series_reg_pcal6534,
#ifdef CONFIG_GPIO_PCA_SERIES_CACHE_ALL
# ifdef GPIO_NXP_PCA_SERIES_DEBUG
.cache_size = GPIO_PCA_GET_CACHE_SIZE_BY_PART_NO(PCA_PART_NO_PCAL6534),
# endif /* GPIO_NXP_PCA_SERIES_DEBUG */
.cache_map = gpio_pca_series_cache_map_pcal65xx,
#endif /* CONFIG_GPIO_PCA_SERIES_CACHE_ALL */
};
/**
* @brief common device instance
*
*/
#define GPIO_PCA_SERIES_DEVICE_INSTANCE(inst, part_no) \
static const struct gpio_pca_series_config gpio_##part_no##_##inst##_cfg = { \
.common = { \
.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(inst), \
}, \
.i2c = I2C_DT_SPEC_INST_GET(inst), \
.part_cfg = GPIO_PCA_GET_PART_CFG_BY_PART_NO(part_no), \
.gpio_rst = GPIO_DT_SPEC_INST_GET_OR(inst, reset_gpios, {}), \
IF_ENABLED(CONFIG_GPIO_PCA_SERIES_INTERRUPT, \
(.gpio_int = GPIO_DT_SPEC_INST_GET_OR(inst, int_gpios, {}),)) \
}; \
static uint8_t gpio_##part_no##_##inst##_reg_cache[COND_CODE_1( \
CONFIG_GPIO_PCA_SERIES_CACHE_ALL, \
(GPIO_PCA_GET_CACHE_SIZE_BY_PART_NO(part_no) /** true */\
), \
(sizeof(struct gpio_pca_series_reg_cache_mini) /** false */ \
))]; \
static struct gpio_pca_series_data gpio_##part_no##_##inst##_data = { \
.lock = Z_SEM_INITIALIZER(gpio_##part_no##_##inst##_data.lock, 1, 1), \
.cache = (void *)gpio_##part_no##_##inst##_reg_cache, \
}; \
DEVICE_DT_INST_DEFINE(inst, gpio_pca_series_init, NULL, \
&gpio_##part_no##_##inst##_data, \
&gpio_##part_no##_##inst##_cfg, POST_KERNEL, \
CONFIG_GPIO_PCA_SERIES_INIT_PRIORITY, \
GPIO_PCA_GET_API_BY_PART_NO(part_no));
#undef DT_DRV_COMPAT
#define DT_DRV_COMPAT nxp_pca9538
DT_INST_FOREACH_STATUS_OKAY_VARGS(GPIO_PCA_SERIES_DEVICE_INSTANCE, PCA_PART_NO_PCA9538)
#undef DT_DRV_COMPAT
#define DT_DRV_COMPAT nxp_pca9539
DT_INST_FOREACH_STATUS_OKAY_VARGS(GPIO_PCA_SERIES_DEVICE_INSTANCE, PCA_PART_NO_PCA9539)
#undef DT_DRV_COMPAT
#define DT_DRV_COMPAT nxp_pca9554
DT_INST_FOREACH_STATUS_OKAY_VARGS(GPIO_PCA_SERIES_DEVICE_INSTANCE, PCA_PART_NO_PCA9554)
#undef DT_DRV_COMPAT
#define DT_DRV_COMPAT nxp_pca9555
DT_INST_FOREACH_STATUS_OKAY_VARGS(GPIO_PCA_SERIES_DEVICE_INSTANCE, PCA_PART_NO_PCA9555)
#undef DT_DRV_COMPAT
#define DT_DRV_COMPAT nxp_pcal6524
DT_INST_FOREACH_STATUS_OKAY_VARGS(GPIO_PCA_SERIES_DEVICE_INSTANCE, PCA_PART_NO_PCAL6524)
#undef DT_DRV_COMPAT
#define DT_DRV_COMPAT nxp_pcal6534
DT_INST_FOREACH_STATUS_OKAY_VARGS(GPIO_PCA_SERIES_DEVICE_INSTANCE, PCA_PART_NO_PCAL6534)
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