blob: e383625f6b30ccb2272ddfe5ea712bd3654f572b [file] [log] [blame]
/*
* Copyright (c) 2019 Brett Witherspoon
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT ti_cc13xx_cc26xx_gpio
#include <zephyr/types.h>
#include <sys/__assert.h>
#include <device.h>
#include <errno.h>
#include <drivers/gpio.h>
#include <driverlib/gpio.h>
#include <driverlib/interrupt.h>
#include <driverlib/ioc.h>
#include <driverlib/prcm.h>
#include <inc/hw_aon_event.h>
#include <ti/drivers/Power.h>
#include <ti/drivers/power/PowerCC26XX.h>
#include "gpio_utils.h"
/* bits 16-18 in iocfg registers correspond to interrupt settings */
#define IOCFG_INT_MASK 0x00070000
/* the rest are for general (non-interrupt) config */
#define IOCFG_GEN_MASK (~IOCFG_INT_MASK)
struct gpio_cc13xx_cc26xx_data {
/* gpio_driver_data needs to be first */
struct gpio_driver_data common;
sys_slist_t callbacks;
};
static struct gpio_cc13xx_cc26xx_data gpio_cc13xx_cc26xx_data_0;
static const struct gpio_driver_config gpio_cc13xx_cc26xx_cfg_0 = {
.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(0),
};
static int gpio_cc13xx_cc26xx_port_set_bits_raw(const struct device *port,
uint32_t mask);
static int gpio_cc13xx_cc26xx_port_clear_bits_raw(const struct device *port,
uint32_t mask);
static int gpio_cc13xx_cc26xx_config(const struct device *port,
gpio_pin_t pin,
gpio_flags_t flags)
{
uint32_t config = 0;
__ASSERT_NO_MSG(pin < NUM_IO_MAX);
switch (flags & (GPIO_INPUT | GPIO_OUTPUT)) {
case GPIO_INPUT:
config = IOC_INPUT_ENABLE;
break;
case GPIO_OUTPUT:
config = IOC_INPUT_DISABLE;
break;
case 0: /* disconnected */
IOCPortConfigureSet(pin, IOC_PORT_GPIO, IOC_NO_IOPULL);
GPIO_setOutputEnableDio(pin, GPIO_OUTPUT_DISABLE);
return 0;
default:
return -ENOTSUP;
}
config |= IOC_SLEW_DISABLE | IOC_NO_WAKE_UP;
config |= (flags & GPIO_INT_DEBOUNCE) ? IOC_HYST_ENABLE :
IOC_HYST_DISABLE;
/*
* The GPIO_DS_ALT_HIGH and GPIO_DS_ALT_LOW flags are for setting
* the highest drive strength for a GPIO in the output HIGH and
* output LOW states, respectively. Since only 1 drive strength
* setting is available for a GPIO (irrespective of output state),
* require both flags to be set for highest drive strength, default
* to low/auto drive strength.
* Not all GPIO support 8ma, but setting that bit will use the highest
* supported drive strength.
*/
switch (flags & (GPIO_DS_ALT_HIGH | GPIO_DS_ALT_LOW)) {
case 0:
config |= IOC_CURRENT_2MA | IOC_STRENGTH_AUTO;
break;
case (GPIO_DS_ALT_HIGH | GPIO_DS_ALT_LOW):
config |= IOC_CURRENT_8MA | IOC_STRENGTH_MAX;
break;
case GPIO_DS_ALT_HIGH:
case GPIO_DS_ALT_LOW:
return -ENOTSUP;
}
switch (flags & (GPIO_PULL_UP | GPIO_PULL_DOWN)) {
case 0:
config |= IOC_NO_IOPULL;
break;
case GPIO_PULL_UP:
config |= IOC_IOPULL_UP;
break;
case GPIO_PULL_DOWN:
config |= IOC_IOPULL_DOWN;
break;
default:
return -EINVAL;
}
config |= IOCPortConfigureGet(pin) & IOCFG_INT_MASK;
IOCPortConfigureSet(pin, IOC_PORT_GPIO, config);
if ((flags & GPIO_OUTPUT) != 0) {
if ((flags & GPIO_OUTPUT_INIT_HIGH) != 0) {
gpio_cc13xx_cc26xx_port_set_bits_raw(port, BIT(pin));
} else if ((flags & GPIO_OUTPUT_INIT_LOW) != 0) {
gpio_cc13xx_cc26xx_port_clear_bits_raw(port, BIT(pin));
}
GPIO_setOutputEnableDio(pin, GPIO_OUTPUT_ENABLE);
} else {
GPIO_setOutputEnableDio(pin, GPIO_OUTPUT_DISABLE);
}
return 0;
}
static int gpio_cc13xx_cc26xx_port_get_raw(const struct device *port,
uint32_t *value)
{
__ASSERT_NO_MSG(value != NULL);
*value = GPIO_readMultiDio(GPIO_DIO_ALL_MASK);
return 0;
}
static int gpio_cc13xx_cc26xx_port_set_masked_raw(const struct device *port,
uint32_t mask,
uint32_t value)
{
GPIO_setMultiDio(mask & value);
GPIO_clearMultiDio(mask & ~value);
return 0;
}
static int gpio_cc13xx_cc26xx_port_set_bits_raw(const struct device *port,
uint32_t mask)
{
GPIO_setMultiDio(mask);
return 0;
}
static int gpio_cc13xx_cc26xx_port_clear_bits_raw(const struct device *port,
uint32_t mask)
{
GPIO_clearMultiDio(mask);
return 0;
}
static int gpio_cc13xx_cc26xx_port_toggle_bits(const struct device *port,
uint32_t mask)
{
GPIO_toggleMultiDio(mask);
return 0;
}
static int gpio_cc13xx_cc26xx_pin_interrupt_configure(const struct device *port,
gpio_pin_t pin,
enum gpio_int_mode mode,
enum gpio_int_trig trig)
{
uint32_t config = 0;
if (mode != GPIO_INT_MODE_DISABLED) {
if (mode == GPIO_INT_MODE_EDGE) {
if (trig == GPIO_INT_TRIG_BOTH) {
config |= IOC_BOTH_EDGES;
} else if (trig == GPIO_INT_TRIG_HIGH) {
config |= IOC_RISING_EDGE;
} else { /* GPIO_INT_TRIG_LOW */
config |= IOC_FALLING_EDGE;
}
} else {
return -ENOTSUP;
}
config |= IOC_INT_ENABLE;
} else {
config |= IOC_INT_DISABLE | IOC_NO_EDGE;
}
config |= IOCPortConfigureGet(pin) & IOCFG_GEN_MASK;
IOCPortConfigureSet(pin, IOC_PORT_GPIO, config);
return 0;
}
static int gpio_cc13xx_cc26xx_manage_callback(const struct device *port,
struct gpio_callback *callback,
bool set)
{
struct gpio_cc13xx_cc26xx_data *data = port->data;
return gpio_manage_callback(&data->callbacks, callback, set);
}
static uint32_t gpio_cc13xx_cc26xx_get_pending_int(const struct device *dev)
{
return GPIO_getEventMultiDio(GPIO_DIO_ALL_MASK);
}
static void gpio_cc13xx_cc26xx_isr(const struct device *dev)
{
struct gpio_cc13xx_cc26xx_data *data = dev->data;
uint32_t status = GPIO_getEventMultiDio(GPIO_DIO_ALL_MASK);
GPIO_clearEventMultiDio(status);
gpio_fire_callbacks(&data->callbacks, dev, status);
}
static int gpio_cc13xx_cc26xx_init(const struct device *dev)
{
#ifdef CONFIG_PM
/* Set dependency on gpio resource to turn on power domains */
Power_setDependency(PowerCC26XX_PERIPH_GPIO);
#else
/* Enable peripheral power domain */
PRCMPowerDomainOn(PRCM_DOMAIN_PERIPH);
/* Enable GPIO peripheral */
PRCMPeripheralRunEnable(PRCM_PERIPH_GPIO);
/* Load PRCM settings */
PRCMLoadSet();
while (!PRCMLoadGet()) {
continue;
}
#endif
/* Enable edge detection on any pad as a wakeup source */
HWREG(AON_EVENT_BASE + AON_EVENT_O_MCUWUSEL) =
(HWREG(AON_EVENT_BASE + AON_EVENT_O_MCUWUSEL) &
(~AON_EVENT_MCUWUSEL_WU1_EV_M)) |
AON_EVENT_MCUWUSEL_WU1_EV_PAD;
/* Enable IRQ */
IRQ_CONNECT(DT_INST_IRQN(0),
DT_INST_IRQ(0, priority),
gpio_cc13xx_cc26xx_isr, DEVICE_DT_INST_GET(0), 0);
irq_enable(DT_INST_IRQN(0));
/* Peripheral should not be accessed until power domain is on. */
while (PRCMPowerDomainStatus(PRCM_DOMAIN_PERIPH) !=
PRCM_DOMAIN_POWER_ON) {
continue;
}
return 0;
}
static const struct gpio_driver_api gpio_cc13xx_cc26xx_driver_api = {
.pin_configure = gpio_cc13xx_cc26xx_config,
.port_get_raw = gpio_cc13xx_cc26xx_port_get_raw,
.port_set_masked_raw = gpio_cc13xx_cc26xx_port_set_masked_raw,
.port_set_bits_raw = gpio_cc13xx_cc26xx_port_set_bits_raw,
.port_clear_bits_raw = gpio_cc13xx_cc26xx_port_clear_bits_raw,
.port_toggle_bits = gpio_cc13xx_cc26xx_port_toggle_bits,
.pin_interrupt_configure = gpio_cc13xx_cc26xx_pin_interrupt_configure,
.manage_callback = gpio_cc13xx_cc26xx_manage_callback,
.get_pending_int = gpio_cc13xx_cc26xx_get_pending_int
};
DEVICE_DT_INST_DEFINE(0, gpio_cc13xx_cc26xx_init,
NULL, &gpio_cc13xx_cc26xx_data_0,
&gpio_cc13xx_cc26xx_cfg_0,
POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
&gpio_cc13xx_cc26xx_driver_api);