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zephyr/drivers/gpio/gpio_cc32xx.c

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/*
* Copyright (c) 2016, Texas Instruments Incorporated
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <errno.h>
#include <device.h>
#include <gpio.h>
#include <init.h>
#include <kernel.h>
#include <sys_io.h>
/* Driverlib includes */
#include <inc/hw_types.h>
#include <inc/hw_memmap.h>
#include <inc/hw_ints.h>
#include <inc/hw_gpio.h>
#include <driverlib/rom.h>
#include <driverlib/pin.h>
#undef __GPIO_H__ /* Zephyr and CC3200SDK gpio.h conflict */
#include <driverlib/gpio.h>
#include <driverlib/rom_map.h>
#include <driverlib/interrupt.h>
#include "gpio_utils.h"
/* Note: Zephyr uses exception numbers, vs the IRQ #s used by the CC3200 SDK */
#define EXCEPTION_GPIOA0 0 /* (INT_GPIOA0 - 16) = (16-16) */
#define EXCEPTION_GPIOA1 1 /* (INT_GPIOA1 - 16) = (17-16) */
#define EXCEPTION_GPIOA2 2 /* (INT_GPIOA2 - 16) = (18-16) */
#define EXCEPTION_GPIOA3 3 /* (INT_GPIOA3 - 16) = (19-16) */
struct gpio_cc32xx_config {
/* base address of GPIO port */
unsigned long port_base;
/* GPIO IRQ number */
unsigned long irq_num;
};
struct gpio_cc32xx_data {
/* list of registered callbacks */
sys_slist_t callbacks;
/* callback enable pin bitmask */
u32_t pin_callback_enables;
};
#define DEV_CFG(dev) \
((const struct gpio_cc32xx_config *)(dev)->config->config_info)
#define DEV_DATA(dev) \
((struct gpio_cc32xx_data *)(dev)->driver_data)
static inline int gpio_cc32xx_config(struct device *port,
int access_op, u32_t pin, int flags)
{
const struct gpio_cc32xx_config *gpio_config = DEV_CFG(port);
unsigned long port_base = gpio_config->port_base;
unsigned long int_type;
/*
* See pinmux_initialize(): which leverages TI's recommended
* method of using the PinMux utility for most pin configuration.
*/
if (access_op == GPIO_ACCESS_BY_PIN) {
/* Just handle runtime interrupt type config here: */
if (flags & GPIO_INT) {
if (flags & GPIO_INT_EDGE) {
if (flags & GPIO_INT_ACTIVE_HIGH) {
int_type = GPIO_RISING_EDGE;
} else if (flags & GPIO_INT_DOUBLE_EDGE) {
int_type = GPIO_BOTH_EDGES;
} else {
int_type = GPIO_FALLING_EDGE;
}
} else { /* GPIO_INT_LEVEL */
if (flags & GPIO_INT_ACTIVE_HIGH) {
int_type = GPIO_HIGH_LEVEL;
} else {
int_type = GPIO_LOW_LEVEL;
}
}
MAP_GPIOIntTypeSet(port_base, (1 << pin), int_type);
MAP_GPIOIntClear(port_base, (1 << pin));
MAP_GPIOIntEnable(port_base, (1 << pin));
}
} else {
return -ENOTSUP;
}
return 0;
}
static inline int gpio_cc32xx_write(struct device *port,
int access_op, u32_t pin, u32_t value)
{
const struct gpio_cc32xx_config *gpio_config = DEV_CFG(port);
unsigned long port_base = gpio_config->port_base;
if (access_op == GPIO_ACCESS_BY_PIN) {
value = value << pin;
/* Bitpack external GPIO pin number for GPIOPinWrite API: */
pin = 1 << pin;
MAP_GPIOPinWrite(port_base, (unsigned char)pin, value);
} else {
return -ENOTSUP;
}
return 0;
}
static inline int gpio_cc32xx_read(struct device *port,
int access_op, u32_t pin, u32_t *value)
{
const struct gpio_cc32xx_config *gpio_config = DEV_CFG(port);
unsigned long port_base = gpio_config->port_base;
long status;
unsigned char pin_packed;
if (access_op == GPIO_ACCESS_BY_PIN) {
/* Bitpack external GPIO pin number for GPIOPinRead API: */
pin_packed = 1 << pin;
status = MAP_GPIOPinRead(port_base, pin_packed);
*value = status >> pin;
} else {
return -ENOTSUP;
}
return 0;
}
static int gpio_cc32xx_manage_callback(struct device *dev,
struct gpio_callback *callback, bool set)
{
struct gpio_cc32xx_data *data = DEV_DATA(dev);
_gpio_manage_callback(&data->callbacks, callback, set);
return 0;
}
static int gpio_cc32xx_enable_callback(struct device *dev,
int access_op, u32_t pin)
{
struct gpio_cc32xx_data *data = DEV_DATA(dev);
if (access_op == GPIO_ACCESS_BY_PIN) {
data->pin_callback_enables |= (1 << pin);
} else {
data->pin_callback_enables = 0xFFFFFFFF;
}
return 0;
}
static int gpio_cc32xx_disable_callback(struct device *dev,
int access_op, u32_t pin)
{
struct gpio_cc32xx_data *data = DEV_DATA(dev);
if (access_op == GPIO_ACCESS_BY_PIN) {
data->pin_callback_enables &= ~(1 << pin);
} else {
data->pin_callback_enables = 0;
}
return 0;
}
static void gpio_cc32xx_port_isr(void *arg)
{
struct device *dev = arg;
const struct gpio_cc32xx_config *config = DEV_CFG(dev);
struct gpio_cc32xx_data *data = DEV_DATA(dev);
u32_t enabled_int, int_status;
/* See which interrupts triggered: */
int_status = (u32_t)MAP_GPIOIntStatus(config->port_base, 1);
enabled_int = int_status & data->pin_callback_enables;
/* Clear and Disable GPIO Interrupt */
MAP_GPIOIntDisable(config->port_base, int_status);
MAP_GPIOIntClear(config->port_base, int_status);
/* Call the registered callbacks */
_gpio_fire_callbacks(&data->callbacks, (struct device *)dev,
enabled_int);
/* Re-enable the interrupts */
MAP_GPIOIntEnable(config->port_base, int_status);
}
static const struct gpio_driver_api api_funcs = {
.config = gpio_cc32xx_config,
.write = gpio_cc32xx_write,
.read = gpio_cc32xx_read,
.manage_callback = gpio_cc32xx_manage_callback,
.enable_callback = gpio_cc32xx_enable_callback,
.disable_callback = gpio_cc32xx_disable_callback,
};
#ifdef CONFIG_GPIO_CC32XX_A0
static const struct gpio_cc32xx_config gpio_cc32xx_a0_config = {
.port_base = GPIOA0_BASE,
.irq_num = INT_GPIOA0,
};
static struct device DEVICE_NAME_GET(gpio_cc32xx_a0);
static struct gpio_cc32xx_data gpio_cc32xx_a0_data;
static int gpio_cc32xx_a0_init(struct device *dev)
{
ARG_UNUSED(dev);
IRQ_CONNECT(EXCEPTION_GPIOA0, CONFIG_GPIO_CC32XX_A0_IRQ_PRI,
gpio_cc32xx_port_isr, DEVICE_GET(gpio_cc32xx_a0), 0);
MAP_IntPendClear(INT_GPIOA0);
irq_enable(EXCEPTION_GPIOA0);
return 0;
}
DEVICE_AND_API_INIT(gpio_cc32xx_a0, CONFIG_GPIO_CC32XX_A0_NAME,
&gpio_cc32xx_a0_init, &gpio_cc32xx_a0_data,
&gpio_cc32xx_a0_config,
POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
&api_funcs);
#endif
#ifdef CONFIG_GPIO_CC32XX_A1
static const struct gpio_cc32xx_config gpio_cc32xx_a1_config = {
.port_base = GPIOA1_BASE,
.irq_num = INT_GPIOA1,
};
static struct device DEVICE_NAME_GET(gpio_cc32xx_a1);
static struct gpio_cc32xx_data gpio_cc32xx_a1_data;
static int gpio_cc32xx_a1_init(struct device *dev)
{
ARG_UNUSED(dev);
IRQ_CONNECT(EXCEPTION_GPIOA1, CONFIG_GPIO_CC32XX_A1_IRQ_PRI,
gpio_cc32xx_port_isr, DEVICE_GET(gpio_cc32xx_a1), 0);
MAP_IntPendClear(INT_GPIOA1);
irq_enable(EXCEPTION_GPIOA1);
return 0;
}
DEVICE_AND_API_INIT(gpio_cc32xx_a1, CONFIG_GPIO_CC32XX_A1_NAME,
&gpio_cc32xx_a1_init, &gpio_cc32xx_a1_data,
&gpio_cc32xx_a1_config,
POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
&api_funcs);
#endif /* CONFIG_GPIO_CC32XX_A1 */
#ifdef CONFIG_GPIO_CC32XX_A2
static const struct gpio_cc32xx_config gpio_cc32xx_a2_config = {
.port_base = GPIOA2_BASE,
.irq_num = INT_GPIOA2,
};
static struct device DEVICE_NAME_GET(gpio_cc32xx_a2);
static struct gpio_cc32xx_data gpio_cc32xx_a2_data;
static int gpio_cc32xx_a2_init(struct device *dev)
{
ARG_UNUSED(dev);
IRQ_CONNECT(EXCEPTION_GPIOA2, CONFIG_GPIO_CC32XX_A2_IRQ_PRI,
gpio_cc32xx_port_isr, DEVICE_GET(gpio_cc32xx_a2), 0);
MAP_IntPendClear(INT_GPIOA2);
irq_enable(EXCEPTION_GPIOA2);
return 0;
}
DEVICE_AND_API_INIT(gpio_cc32xx_a2, CONFIG_GPIO_CC32XX_A2_NAME,
&gpio_cc32xx_a2_init, &gpio_cc32xx_a2_data,
&gpio_cc32xx_a2_config,
POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
&api_funcs);
#endif
#ifdef CONFIG_GPIO_CC32XX_A3
static const struct gpio_cc32xx_config gpio_cc32xx_a3_config = {
.port_base = GPIOA3_BASE,
.irq_num = INT_GPIOA3,
};
static struct device DEVICE_NAME_GET(gpio_cc32xx_a3);
static struct gpio_cc32xx_data gpio_cc32xx_a3_data;
static int gpio_cc32xx_a3_init(struct device *dev)
{
ARG_UNUSED(dev);
IRQ_CONNECT(EXCEPTION_GPIOA3, CONFIG_GPIO_CC32XX_A3_IRQ_PRI,
gpio_cc32xx_port_isr, DEVICE_GET(gpio_cc32xx_a3), 0);
MAP_IntPendClear(INT_GPIOA3);
irq_enable(EXCEPTION_GPIOA3);
return 0;
}
DEVICE_AND_API_INIT(gpio_cc32xx_a3, CONFIG_GPIO_CC32XX_A3_NAME,
&gpio_cc32xx_a3_init, &gpio_cc32xx_a3_data,
&gpio_cc32xx_a3_config,
POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
&api_funcs);
#endif
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