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zephyr/drivers/gpio/gpio_ite_it8xxx2.c

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/*
* Copyright (c) 2020 ITE Corporation. All Rights Reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
*/
#include <errno.h>
#include <zephyr/device.h>
#include <zephyr/devicetree.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/dt-bindings/gpio/ite-it8xxx2-gpio.h>
#include <zephyr/dt-bindings/interrupt-controller/ite-intc.h>
#include <zephyr/init.h>
#include <zephyr/irq.h>
#include <zephyr/types.h>
#include <zephyr/sys/util.h>
#include <string.h>
#include <zephyr/logging/log.h>
#include <zephyr/drivers/gpio/gpio_utils.h>
#include <chip_chipregs.h>
#include <soc_common.h>
LOG_MODULE_REGISTER(gpio_it8xxx2, LOG_LEVEL_ERR);
#define DT_DRV_COMPAT ite_it8xxx2_gpio
/*
* Structure gpio_ite_cfg is about the setting of gpio
* this config will be used at initial time
*/
struct gpio_ite_cfg {
/* gpio_driver_config needs to be first */
struct gpio_driver_config common;
/* gpio port data register (bit mapping to pin) */
uintptr_t reg_gpdr;
/* gpio port control register (byte mapping to pin) */
uintptr_t reg_gpcr;
/* gpio port data mirror register (bit mapping to pin) */
uintptr_t reg_gpdmr;
/* gpio port output type register (bit mapping to pin) */
uintptr_t reg_gpotr;
/* Index in gpio_1p8v for voltage level control register element. */
uint8_t index;
/* gpio's irq */
uint8_t gpio_irq[8];
};
/* Structure gpio_ite_data is about callback function */
struct gpio_ite_data {
struct gpio_driver_data common;
sys_slist_t callbacks;
};
/* dev macros for GPIO */
#define DEV_GPIO_DATA(dev) \
((struct gpio_ite_data *)(dev)->data)
#define DEV_GPIO_CFG(dev) \
((const struct gpio_ite_cfg *)(dev)->config)
/**
* Convert wake-up controller (WUC) group to the corresponding wake-up edge
* sense register (WUESR). Return pointer to the register.
*
* @param grp WUC group.
*
* @return Pointer to corresponding WUESR register.
*/
static volatile uint8_t *wuesr(uint8_t grp)
{
/*
* From WUESR1-WUESR4, the address increases by ones. From WUESR5 on
* the address increases by fours.
*/
return (grp <= 4) ?
(volatile uint8_t *)(IT8XXX2_WUC_WUESR1 + grp-1) :
(volatile uint8_t *)(IT8XXX2_WUC_WUESR5 + 4*(grp-5));
}
/**
* Convert wake-up controller (WUC) group to the corresponding wake-up edge
* mode register (WUEMR). Return pointer to the register.
*
* @param grp WUC group.
*
* @return Pointer to corresponding WUEMR register.
*/
static volatile uint8_t *wuemr(uint8_t grp)
{
/*
* From WUEMR1-WUEMR4, the address increases by ones. From WUEMR5 on
* the address increases by fours.
*/
return (grp <= 4) ?
(volatile uint8_t *)(IT8XXX2_WUC_WUEMR1 + grp-1) :
(volatile uint8_t *)(IT8XXX2_WUC_WUEMR5 + 4*(grp-5));
}
/**
* Convert wake-up controller (WUC) group to the corresponding wake-up both edge
* mode register (WUBEMR). Return pointer to the register.
*
* @param grp WUC group.
*
* @return Pointer to corresponding WUBEMR register.
*/
static volatile uint8_t *wubemr(uint8_t grp)
{
/*
* From WUBEMR1-WUBEMR4, the address increases by ones. From WUBEMR5 on
* the address increases by fours.
*/
return (grp <= 4) ?
(volatile uint8_t *)(IT8XXX2_WUC_WUBEMR1 + grp-1) :
(volatile uint8_t *)(IT8XXX2_WUC_WUBEMR5 + 4*(grp-5));
}
/*
* Array to store the corresponding GPIO WUC group and mask
* for each WUC interrupt. This allows GPIO interrupts coming in through WUC
* to easily identify which pin caused the interrupt.
*/
static const struct {
uint8_t gpio_mask;
uint8_t wuc_group;
uint8_t wuc_mask;
} gpio_irqs[] = {
/* irq gpio_mask, wuc_group, wuc_mask */
[IT8XXX2_IRQ_WU20] = {BIT(0), 2, BIT(0)},
[IT8XXX2_IRQ_WU21] = {BIT(1), 2, BIT(1)},
[IT8XXX2_IRQ_WU22] = {BIT(4), 2, BIT(2)},
[IT8XXX2_IRQ_WU23] = {BIT(6), 2, BIT(3)},
[IT8XXX2_IRQ_WU24] = {BIT(2), 2, BIT(4)},
[IT8XXX2_IRQ_WU40] = {BIT(5), 4, BIT(0)},
[IT8XXX2_IRQ_WU45] = {BIT(6), 4, BIT(5)},
[IT8XXX2_IRQ_WU46] = {BIT(7), 4, BIT(6)},
[IT8XXX2_IRQ_WU50] = {BIT(0), 5, BIT(0)},
[IT8XXX2_IRQ_WU51] = {BIT(1), 5, BIT(1)},
[IT8XXX2_IRQ_WU52] = {BIT(2), 5, BIT(2)},
[IT8XXX2_IRQ_WU53] = {BIT(3), 5, BIT(3)},
[IT8XXX2_IRQ_WU54] = {BIT(4), 5, BIT(4)},
[IT8XXX2_IRQ_WU55] = {BIT(5), 5, BIT(5)},
[IT8XXX2_IRQ_WU56] = {BIT(6), 5, BIT(6)},
[IT8XXX2_IRQ_WU57] = {BIT(7), 5, BIT(7)},
[IT8XXX2_IRQ_WU60] = {BIT(0), 6, BIT(0)},
[IT8XXX2_IRQ_WU61] = {BIT(1), 6, BIT(1)},
[IT8XXX2_IRQ_WU62] = {BIT(2), 6, BIT(2)},
[IT8XXX2_IRQ_WU63] = {BIT(3), 6, BIT(3)},
[IT8XXX2_IRQ_WU64] = {BIT(4), 6, BIT(4)},
[IT8XXX2_IRQ_WU65] = {BIT(5), 6, BIT(5)},
[IT8XXX2_IRQ_WU66] = {BIT(6), 6, BIT(6)},
[IT8XXX2_IRQ_WU67] = {BIT(7), 6, BIT(7)},
[IT8XXX2_IRQ_WU70] = {BIT(0), 7, BIT(0)},
[IT8XXX2_IRQ_WU71] = {BIT(1), 7, BIT(1)},
[IT8XXX2_IRQ_WU72] = {BIT(2), 7, BIT(2)},
[IT8XXX2_IRQ_WU73] = {BIT(3), 7, BIT(3)},
[IT8XXX2_IRQ_WU74] = {BIT(4), 7, BIT(4)},
[IT8XXX2_IRQ_WU75] = {BIT(5), 7, BIT(5)},
[IT8XXX2_IRQ_WU76] = {BIT(6), 7, BIT(6)},
[IT8XXX2_IRQ_WU77] = {BIT(7), 7, BIT(7)},
[IT8XXX2_IRQ_WU80] = {BIT(3), 8, BIT(0)},
[IT8XXX2_IRQ_WU81] = {BIT(4), 8, BIT(1)},
[IT8XXX2_IRQ_WU82] = {BIT(5), 8, BIT(2)},
[IT8XXX2_IRQ_WU83] = {BIT(6), 8, BIT(3)},
[IT8XXX2_IRQ_WU84] = {BIT(2), 8, BIT(4)},
[IT8XXX2_IRQ_WU85] = {BIT(0), 8, BIT(5)},
[IT8XXX2_IRQ_WU86] = {BIT(7), 8, BIT(6)},
[IT8XXX2_IRQ_WU87] = {BIT(7), 8, BIT(7)},
[IT8XXX2_IRQ_WU88] = {BIT(4), 9, BIT(0)},
[IT8XXX2_IRQ_WU89] = {BIT(5), 9, BIT(1)},
[IT8XXX2_IRQ_WU90] = {BIT(6), 9, BIT(2)},
[IT8XXX2_IRQ_WU91] = {BIT(0), 9, BIT(3)},
[IT8XXX2_IRQ_WU92] = {BIT(1), 9, BIT(4)},
[IT8XXX2_IRQ_WU93] = {BIT(2), 9, BIT(5)},
[IT8XXX2_IRQ_WU94] = {BIT(4), 9, BIT(6)},
[IT8XXX2_IRQ_WU95] = {BIT(2), 9, BIT(7)},
[IT8XXX2_IRQ_WU96] = {BIT(0), 10, BIT(0)},
[IT8XXX2_IRQ_WU97] = {BIT(1), 10, BIT(1)},
[IT8XXX2_IRQ_WU98] = {BIT(2), 10, BIT(2)},
[IT8XXX2_IRQ_WU99] = {BIT(3), 10, BIT(3)},
[IT8XXX2_IRQ_WU100] = {BIT(7), 10, BIT(4)},
[IT8XXX2_IRQ_WU101] = {BIT(0), 10, BIT(5)},
[IT8XXX2_IRQ_WU102] = {BIT(1), 10, BIT(6)},
[IT8XXX2_IRQ_WU103] = {BIT(3), 10, BIT(7)},
[IT8XXX2_IRQ_WU104] = {BIT(5), 11, BIT(0)},
[IT8XXX2_IRQ_WU105] = {BIT(6), 11, BIT(1)},
[IT8XXX2_IRQ_WU106] = {BIT(7), 11, BIT(2)},
[IT8XXX2_IRQ_WU107] = {BIT(1), 11, BIT(3)},
[IT8XXX2_IRQ_WU108] = {BIT(3), 11, BIT(4)},
[IT8XXX2_IRQ_WU109] = {BIT(5), 11, BIT(5)},
[IT8XXX2_IRQ_WU110] = {BIT(3), 11, BIT(6)},
[IT8XXX2_IRQ_WU111] = {BIT(4), 11, BIT(7)},
[IT8XXX2_IRQ_WU112] = {BIT(5), 12, BIT(0)},
[IT8XXX2_IRQ_WU113] = {BIT(6), 12, BIT(1)},
[IT8XXX2_IRQ_WU114] = {BIT(4), 12, BIT(2)},
[IT8XXX2_IRQ_WU115] = {BIT(0), 12, BIT(3)},
[IT8XXX2_IRQ_WU116] = {BIT(1), 12, BIT(4)},
[IT8XXX2_IRQ_WU117] = {BIT(2), 12, BIT(5)},
[IT8XXX2_IRQ_WU118] = {BIT(6), 12, BIT(6)},
[IT8XXX2_IRQ_WU119] = {BIT(0), 12, BIT(7)},
[IT8XXX2_IRQ_WU120] = {BIT(1), 13, BIT(0)},
[IT8XXX2_IRQ_WU121] = {BIT(2), 13, BIT(1)},
[IT8XXX2_IRQ_WU122] = {BIT(3), 13, BIT(2)},
[IT8XXX2_IRQ_WU123] = {BIT(3), 13, BIT(3)},
[IT8XXX2_IRQ_WU124] = {BIT(4), 13, BIT(4)},
[IT8XXX2_IRQ_WU125] = {BIT(5), 13, BIT(5)},
[IT8XXX2_IRQ_WU126] = {BIT(7), 13, BIT(6)},
[IT8XXX2_IRQ_WU128] = {BIT(0), 14, BIT(0)},
[IT8XXX2_IRQ_WU129] = {BIT(1), 14, BIT(1)},
[IT8XXX2_IRQ_WU130] = {BIT(2), 14, BIT(2)},
[IT8XXX2_IRQ_WU131] = {BIT(3), 14, BIT(3)},
[IT8XXX2_IRQ_WU132] = {BIT(4), 14, BIT(4)},
[IT8XXX2_IRQ_WU133] = {BIT(5), 14, BIT(5)},
[IT8XXX2_IRQ_WU134] = {BIT(6), 14, BIT(6)},
[IT8XXX2_IRQ_WU135] = {BIT(7), 14, BIT(7)},
[IT8XXX2_IRQ_WU136] = {BIT(0), 15, BIT(0)},
[IT8XXX2_IRQ_WU137] = {BIT(1), 15, BIT(1)},
[IT8XXX2_IRQ_WU138] = {BIT(2), 15, BIT(2)},
[IT8XXX2_IRQ_WU139] = {BIT(3), 15, BIT(3)},
[IT8XXX2_IRQ_WU140] = {BIT(4), 15, BIT(4)},
[IT8XXX2_IRQ_WU141] = {BIT(5), 15, BIT(5)},
[IT8XXX2_IRQ_WU142] = {BIT(6), 15, BIT(6)},
[IT8XXX2_IRQ_WU143] = {BIT(7), 15, BIT(7)},
[IT8XXX2_IRQ_WU144] = {BIT(0), 16, BIT(0)},
[IT8XXX2_IRQ_WU145] = {BIT(1), 16, BIT(1)},
[IT8XXX2_IRQ_WU146] = {BIT(2), 16, BIT(2)},
[IT8XXX2_IRQ_WU147] = {BIT(3), 16, BIT(3)},
[IT8XXX2_IRQ_WU148] = {BIT(4), 16, BIT(4)},
[IT8XXX2_IRQ_WU149] = {BIT(5), 16, BIT(5)},
[IT8XXX2_IRQ_WU150] = {BIT(6), 16, BIT(6)},
[IT8XXX2_IRQ_COUNT] = { 0, 0, 0},
};
BUILD_ASSERT(ARRAY_SIZE(gpio_irqs) == IT8XXX2_IRQ_COUNT + 1);
/* 1.8v gpio group a, b, c, d, e, f, g, h, i, j, k, l, and m */
#define GPIO_GROUP_COUNT 13
#define GPIO_GROUP_INDEX(label) \
(uint8_t)(DT_REG_ADDR(DT_NODELABEL(label)) - \
DT_REG_ADDR(DT_NODELABEL(gpioa)))
/* general control registers for selecting 1.8V/3.3V */
static const struct {
uint8_t offset;
uint8_t mask_1p8v;
} gpio_1p8v[GPIO_GROUP_COUNT][8] = {
[GPIO_GROUP_INDEX(gpioa)] = {
[4] = {IT8XXX2_GPIO_GCR24_OFFSET, BIT(0)},
[5] = {IT8XXX2_GPIO_GCR24_OFFSET, BIT(1)},
[6] = {IT8XXX2_GPIO_GCR24_OFFSET, BIT(5)},
[7] = {IT8XXX2_GPIO_GCR24_OFFSET, BIT(6)} },
[GPIO_GROUP_INDEX(gpiob)] = {
[3] = {IT8XXX2_GPIO_GCR22_OFFSET, BIT(1)},
[4] = {IT8XXX2_GPIO_GCR22_OFFSET, BIT(0)},
[5] = {IT8XXX2_GPIO_GCR19_OFFSET, BIT(7)},
[6] = {IT8XXX2_GPIO_GCR19_OFFSET, BIT(6)},
[7] = {IT8XXX2_GPIO_GCR24_OFFSET, BIT(4)} },
[GPIO_GROUP_INDEX(gpioc)] = {
[0] = {IT8XXX2_GPIO_GCR22_OFFSET, BIT(7)},
[1] = {IT8XXX2_GPIO_GCR19_OFFSET, BIT(5)},
[2] = {IT8XXX2_GPIO_GCR19_OFFSET, BIT(4)},
[4] = {IT8XXX2_GPIO_GCR24_OFFSET, BIT(2)},
[6] = {IT8XXX2_GPIO_GCR24_OFFSET, BIT(3)},
[7] = {IT8XXX2_GPIO_GCR19_OFFSET, BIT(3)} },
[GPIO_GROUP_INDEX(gpiod)] = {
[0] = {IT8XXX2_GPIO_GCR19_OFFSET, BIT(2)},
[1] = {IT8XXX2_GPIO_GCR19_OFFSET, BIT(1)},
[2] = {IT8XXX2_GPIO_GCR19_OFFSET, BIT(0)},
[3] = {IT8XXX2_GPIO_GCR20_OFFSET, BIT(7)},
[4] = {IT8XXX2_GPIO_GCR20_OFFSET, BIT(6)},
[5] = {IT8XXX2_GPIO_GCR22_OFFSET, BIT(4)},
[6] = {IT8XXX2_GPIO_GCR22_OFFSET, BIT(5)},
[7] = {IT8XXX2_GPIO_GCR22_OFFSET, BIT(6)} },
[GPIO_GROUP_INDEX(gpioe)] = {
[0] = {IT8XXX2_GPIO_GCR20_OFFSET, BIT(5)},
[1] = {IT8XXX2_GPIO_GCR28_OFFSET, BIT(6)},
[2] = {IT8XXX2_GPIO_GCR28_OFFSET, BIT(7)},
[4] = {IT8XXX2_GPIO_GCR22_OFFSET, BIT(2)},
[5] = {IT8XXX2_GPIO_GCR22_OFFSET, BIT(3)},
[6] = {IT8XXX2_GPIO_GCR20_OFFSET, BIT(4)},
[7] = {IT8XXX2_GPIO_GCR20_OFFSET, BIT(3)} },
[GPIO_GROUP_INDEX(gpiof)] = {
[0] = {IT8XXX2_GPIO_GCR28_OFFSET, BIT(4)},
[1] = {IT8XXX2_GPIO_GCR28_OFFSET, BIT(5)},
[2] = {IT8XXX2_GPIO_GCR20_OFFSET, BIT(2)},
[3] = {IT8XXX2_GPIO_GCR20_OFFSET, BIT(1)},
[4] = {IT8XXX2_GPIO_GCR20_OFFSET, BIT(0)},
[5] = {IT8XXX2_GPIO_GCR21_OFFSET, BIT(7)},
[6] = {IT8XXX2_GPIO_GCR21_OFFSET, BIT(6)},
[7] = {IT8XXX2_GPIO_GCR21_OFFSET, BIT(5)} },
[GPIO_GROUP_INDEX(gpiog)] = {
[0] = {IT8XXX2_GPIO_GCR28_OFFSET, BIT(2)},
[1] = {IT8XXX2_GPIO_GCR21_OFFSET, BIT(4)},
[2] = {IT8XXX2_GPIO_GCR28_OFFSET, BIT(3)},
[6] = {IT8XXX2_GPIO_GCR21_OFFSET, BIT(3)} },
[GPIO_GROUP_INDEX(gpioh)] = {
[0] = {IT8XXX2_GPIO_GCR21_OFFSET, BIT(2)},
[1] = {IT8XXX2_GPIO_GCR21_OFFSET, BIT(1)},
[2] = {IT8XXX2_GPIO_GCR21_OFFSET, BIT(0)},
[5] = {IT8XXX2_GPIO_GCR27_OFFSET, BIT(7)},
[6] = {IT8XXX2_GPIO_GCR28_OFFSET, BIT(0)} },
[GPIO_GROUP_INDEX(gpioi)] = {
[0] = {IT8XXX2_GPIO_GCR27_OFFSET, BIT(3)},
[1] = {IT8XXX2_GPIO_GCR23_OFFSET, BIT(4)},
[2] = {IT8XXX2_GPIO_GCR23_OFFSET, BIT(5)},
[3] = {IT8XXX2_GPIO_GCR23_OFFSET, BIT(6)},
[4] = {IT8XXX2_GPIO_GCR23_OFFSET, BIT(7)},
[5] = {IT8XXX2_GPIO_GCR27_OFFSET, BIT(4)},
[6] = {IT8XXX2_GPIO_GCR27_OFFSET, BIT(5)},
[7] = {IT8XXX2_GPIO_GCR27_OFFSET, BIT(6)} },
[GPIO_GROUP_INDEX(gpioj)] = {
[0] = {IT8XXX2_GPIO_GCR23_OFFSET, BIT(0)},
[1] = {IT8XXX2_GPIO_GCR23_OFFSET, BIT(1)},
[2] = {IT8XXX2_GPIO_GCR23_OFFSET, BIT(2)},
[3] = {IT8XXX2_GPIO_GCR23_OFFSET, BIT(3)},
[4] = {IT8XXX2_GPIO_GCR27_OFFSET, BIT(0)},
[5] = {IT8XXX2_GPIO_GCR27_OFFSET, BIT(1)},
[6] = {IT8XXX2_GPIO_GCR27_OFFSET, BIT(2)},
[7] = {IT8XXX2_GPIO_GCR33_OFFSET, BIT(2)} },
[GPIO_GROUP_INDEX(gpiok)] = {
[0] = {IT8XXX2_GPIO_GCR26_OFFSET, BIT(0)},
[1] = {IT8XXX2_GPIO_GCR26_OFFSET, BIT(1)},
[2] = {IT8XXX2_GPIO_GCR26_OFFSET, BIT(2)},
[3] = {IT8XXX2_GPIO_GCR26_OFFSET, BIT(3)},
[4] = {IT8XXX2_GPIO_GCR26_OFFSET, BIT(4)},
[5] = {IT8XXX2_GPIO_GCR26_OFFSET, BIT(5)},
[6] = {IT8XXX2_GPIO_GCR26_OFFSET, BIT(6)},
[7] = {IT8XXX2_GPIO_GCR26_OFFSET, BIT(7)} },
[GPIO_GROUP_INDEX(gpiol)] = {
[0] = {IT8XXX2_GPIO_GCR25_OFFSET, BIT(0)},
[1] = {IT8XXX2_GPIO_GCR25_OFFSET, BIT(1)},
[2] = {IT8XXX2_GPIO_GCR25_OFFSET, BIT(2)},
[3] = {IT8XXX2_GPIO_GCR25_OFFSET, BIT(3)},
[4] = {IT8XXX2_GPIO_GCR25_OFFSET, BIT(4)},
[5] = {IT8XXX2_GPIO_GCR25_OFFSET, BIT(5)},
[6] = {IT8XXX2_GPIO_GCR25_OFFSET, BIT(6)},
[7] = {IT8XXX2_GPIO_GCR25_OFFSET, BIT(7)} },
/*
* M group's voltage level is according to chip's VCC is connected
* to 1.8V or 3.3V.
*/
[GPIO_GROUP_INDEX(gpiom)] = {
[0] = {IT8XXX2_GPIO_GCR30_OFFSET, BIT(4)},
[1] = {IT8XXX2_GPIO_GCR30_OFFSET, BIT(4)},
[2] = {IT8XXX2_GPIO_GCR30_OFFSET, BIT(4)},
[3] = {IT8XXX2_GPIO_GCR30_OFFSET, BIT(4)},
[4] = {IT8XXX2_GPIO_GCR30_OFFSET, BIT(4)},
[5] = {IT8XXX2_GPIO_GCR30_OFFSET, BIT(4)},
[6] = {IT8XXX2_GPIO_GCR30_OFFSET, BIT(4)} },
};
/**
* Driver functions
*/
static int gpio_ite_configure(const struct device *dev,
gpio_pin_t pin,
gpio_flags_t flags)
{
const struct gpio_ite_cfg *gpio_config = DEV_GPIO_CFG(dev);
volatile uint8_t *reg_gpdr = (uint8_t *)gpio_config->reg_gpdr;
volatile uint8_t *reg_gpcr = (uint8_t *)(gpio_config->reg_gpcr + pin);
volatile uint8_t *reg_gpotr = (uint8_t *)gpio_config->reg_gpotr;
volatile uint8_t *reg_1p8v;
volatile uint8_t mask_1p8v;
uint8_t mask = BIT(pin);
__ASSERT(gpio_config->index < GPIO_GROUP_COUNT,
"Invalid GPIO group index");
/* Don't support "open source" mode */
if (((flags & GPIO_SINGLE_ENDED) != 0) &&
((flags & GPIO_LINE_OPEN_DRAIN) == 0)) {
return -ENOTSUP;
}
if (flags == GPIO_DISCONNECTED) {
*reg_gpcr = GPCR_PORT_PIN_MODE_TRISTATE;
/*
* Since not all GPIOs can be to configured as tri-state,
* prompt error if pin doesn't support the flag.
*/
if (*reg_gpcr != GPCR_PORT_PIN_MODE_TRISTATE) {
/* Go back to default setting (input) */
*reg_gpcr = GPCR_PORT_PIN_MODE_INPUT;
LOG_ERR("Cannot config GPIO-%c%d as tri-state",
(gpio_config->index + 'A'), pin);
return -ENOTSUP;
}
/*
* The following configuration isn't necessary because the pin
* was configured as disconnected.
*/
return 0;
}
/*
* Select open drain first, so that we don't glitch the signal
* when changing the line to an output.
*/
if (flags & GPIO_OPEN_DRAIN) {
*reg_gpotr |= mask;
} else {
*reg_gpotr &= ~mask;
}
/* 1.8V or 3.3V */
reg_1p8v = &IT8XXX2_GPIO_GCRX(
gpio_1p8v[gpio_config->index][pin].offset);
mask_1p8v = gpio_1p8v[gpio_config->index][pin].mask_1p8v;
if (reg_1p8v != &IT8XXX2_GPIO_GCRX(0)) {
gpio_flags_t volt = flags & IT8XXX2_GPIO_VOLTAGE_MASK;
if (volt == IT8XXX2_GPIO_VOLTAGE_1P8) {
__ASSERT(!(flags & GPIO_PULL_UP),
"Don't enable internal pullup if 1.8V voltage is used");
*reg_1p8v |= mask_1p8v;
} else if (volt == IT8XXX2_GPIO_VOLTAGE_3P3 ||
volt == IT8XXX2_GPIO_VOLTAGE_DEFAULT) {
*reg_1p8v &= ~mask_1p8v;
} else {
return -EINVAL;
}
}
/* If output, set level before changing type to an output. */
if (flags & GPIO_OUTPUT) {
if (flags & GPIO_OUTPUT_INIT_HIGH) {
*reg_gpdr |= mask;
} else if (flags & GPIO_OUTPUT_INIT_LOW) {
*reg_gpdr &= ~mask;
}
}
/* Set input or output. */
if (flags & GPIO_OUTPUT) {
*reg_gpcr = (*reg_gpcr | GPCR_PORT_PIN_MODE_OUTPUT) &
~GPCR_PORT_PIN_MODE_INPUT;
} else {
*reg_gpcr = (*reg_gpcr | GPCR_PORT_PIN_MODE_INPUT) &
~GPCR_PORT_PIN_MODE_OUTPUT;
}
/* Handle pullup / pulldown */
if (flags & GPIO_PULL_UP) {
*reg_gpcr = (*reg_gpcr | GPCR_PORT_PIN_MODE_PULLUP) &
~GPCR_PORT_PIN_MODE_PULLDOWN;
} else if (flags & GPIO_PULL_DOWN) {
*reg_gpcr = (*reg_gpcr | GPCR_PORT_PIN_MODE_PULLDOWN) &
~GPCR_PORT_PIN_MODE_PULLUP;
} else {
/* No pull up/down */
*reg_gpcr &= ~(GPCR_PORT_PIN_MODE_PULLUP |
GPCR_PORT_PIN_MODE_PULLDOWN);
}
return 0;
}
#ifdef CONFIG_GPIO_GET_CONFIG
static int gpio_ite_get_config(const struct device *dev,
gpio_pin_t pin,
gpio_flags_t *out_flags)
{
const struct gpio_ite_cfg *gpio_config = DEV_GPIO_CFG(dev);
volatile uint8_t *reg_gpdr = (uint8_t *)gpio_config->reg_gpdr;
volatile uint8_t *reg_gpcr = (uint8_t *)(gpio_config->reg_gpcr + pin);
volatile uint8_t *reg_gpotr = (uint8_t *)gpio_config->reg_gpotr;
volatile uint8_t *reg_1p8v;
volatile uint8_t mask_1p8v;
uint8_t mask = BIT(pin);
gpio_flags_t flags = 0;
__ASSERT(gpio_config->index < GPIO_GROUP_COUNT,
"Invalid GPIO group index");
/* push-pull or open-drain */
if (*reg_gpotr & mask) {
flags |= GPIO_OPEN_DRAIN;
}
/* 1.8V or 3.3V */
reg_1p8v = &IT8XXX2_GPIO_GCRX(
gpio_1p8v[gpio_config->index][pin].offset);
/*
* Since not all GPIOs support voltage selection, voltage flag
* is only set if voltage selection register is present.
*/
if (reg_1p8v != &IT8XXX2_GPIO_GCRX(0)) {
mask_1p8v = gpio_1p8v[gpio_config->index][pin].mask_1p8v;
if (*reg_1p8v & mask_1p8v) {
flags |= IT8XXX2_GPIO_VOLTAGE_1P8;
} else {
flags |= IT8XXX2_GPIO_VOLTAGE_3P3;
}
}
/* set input or output. */
if (*reg_gpcr & GPCR_PORT_PIN_MODE_OUTPUT) {
flags |= GPIO_OUTPUT;
/* set level */
if (*reg_gpdr & mask) {
flags |= GPIO_OUTPUT_HIGH;
} else {
flags |= GPIO_OUTPUT_LOW;
}
}
if (*reg_gpcr & GPCR_PORT_PIN_MODE_INPUT) {
flags |= GPIO_INPUT;
/* pullup / pulldown */
if (*reg_gpcr & GPCR_PORT_PIN_MODE_PULLUP) {
flags |= GPIO_PULL_UP;
}
if (*reg_gpcr & GPCR_PORT_PIN_MODE_PULLDOWN) {
flags |= GPIO_PULL_DOWN;
}
}
*out_flags = flags;
return 0;
}
#endif
static int gpio_ite_port_get_raw(const struct device *dev,
gpio_port_value_t *value)
{
const struct gpio_ite_cfg *gpio_config = DEV_GPIO_CFG(dev);
volatile uint8_t *reg_gpdmr = (uint8_t *)gpio_config->reg_gpdmr;
/* Get raw bits of GPIO mirror register */
*value = *reg_gpdmr;
return 0;
}
static int gpio_ite_port_set_masked_raw(const struct device *dev,
gpio_port_pins_t mask,
gpio_port_value_t value)
{
const struct gpio_ite_cfg *gpio_config = DEV_GPIO_CFG(dev);
volatile uint8_t *reg_gpdr = (uint8_t *)gpio_config->reg_gpdr;
uint8_t out = *reg_gpdr;
*reg_gpdr = ((out & ~mask) | (value & mask));
return 0;
}
static int gpio_ite_port_set_bits_raw(const struct device *dev,
gpio_port_pins_t pins)
{
const struct gpio_ite_cfg *gpio_config = DEV_GPIO_CFG(dev);
volatile uint8_t *reg_gpdr = (uint8_t *)gpio_config->reg_gpdr;
/* Set raw bits of GPIO data register */
*reg_gpdr |= pins;
return 0;
}
static int gpio_ite_port_clear_bits_raw(const struct device *dev,
gpio_port_pins_t pins)
{
const struct gpio_ite_cfg *gpio_config = DEV_GPIO_CFG(dev);
volatile uint8_t *reg_gpdr = (uint8_t *)gpio_config->reg_gpdr;
/* Clear raw bits of GPIO data register */
*reg_gpdr &= ~pins;
return 0;
}
static int gpio_ite_port_toggle_bits(const struct device *dev,
gpio_port_pins_t pins)
{
const struct gpio_ite_cfg *gpio_config = DEV_GPIO_CFG(dev);
volatile uint8_t *reg_gpdr = (uint8_t *)gpio_config->reg_gpdr;
/* Toggle raw bits of GPIO data register */
*reg_gpdr ^= pins;
return 0;
}
static int gpio_ite_manage_callback(const struct device *dev,
struct gpio_callback *callback,
bool set)
{
struct gpio_ite_data *data = DEV_GPIO_DATA(dev);
return gpio_manage_callback(&data->callbacks, callback, set);
}
static void gpio_ite_isr(const void *arg)
{
uint8_t irq = ite_intc_get_irq_num();
const struct device *dev = arg;
struct gpio_ite_data *data = DEV_GPIO_DATA(dev);
uint8_t gpio_mask = gpio_irqs[irq].gpio_mask;
if (gpio_irqs[irq].wuc_group) {
/* Clear the WUC status register. */
*(wuesr(gpio_irqs[irq].wuc_group)) = gpio_irqs[irq].wuc_mask;
gpio_fire_callbacks(&data->callbacks, dev, gpio_mask);
}
}
static int gpio_ite_pin_interrupt_configure(const struct device *dev,
gpio_pin_t pin,
enum gpio_int_mode mode,
enum gpio_int_trig trig)
{
const struct gpio_ite_cfg *gpio_config = DEV_GPIO_CFG(dev);
uint8_t gpio_irq = gpio_config->gpio_irq[pin];
#ifdef CONFIG_GPIO_ENABLE_DISABLE_INTERRUPT
if (mode == GPIO_INT_MODE_DISABLED || mode == GPIO_INT_MODE_DISABLE_ONLY) {
#else
if (mode == GPIO_INT_MODE_DISABLED) {
#endif /* CONFIG_GPIO_ENABLE_DISABLE_INTERRUPT */
/* Disable GPIO interrupt */
irq_disable(gpio_irq);
return 0;
#ifdef CONFIG_GPIO_ENABLE_DISABLE_INTERRUPT
} else if (mode == GPIO_INT_MODE_ENABLE_ONLY) {
/* Only enable GPIO interrupt */
irq_enable(gpio_irq);
return 0;
#endif /* CONFIG_GPIO_ENABLE_DISABLE_INTERRUPT */
}
if (mode == GPIO_INT_MODE_LEVEL) {
LOG_ERR("Level trigger mode not supported");
return -ENOTSUP;
}
/* Disable irq before configuring it */
irq_disable(gpio_irq);
if (trig & GPIO_INT_TRIG_BOTH) {
uint8_t wuc_group = gpio_irqs[gpio_irq].wuc_group;
uint8_t wuc_mask = gpio_irqs[gpio_irq].wuc_mask;
/* Set both edges interrupt. */
if ((trig & GPIO_INT_TRIG_BOTH) == GPIO_INT_TRIG_BOTH) {
*(wubemr(wuc_group)) |= wuc_mask;
} else {
*(wubemr(wuc_group)) &= ~wuc_mask;
}
if (trig & GPIO_INT_TRIG_LOW) {
*(wuemr(wuc_group)) |= wuc_mask;
} else {
*(wuemr(wuc_group)) &= ~wuc_mask;
}
/*
* Always write 1 to clear the WUC status register after
* modifying edge mode selection register (WUBEMR and WUEMR).
*/
*(wuesr(wuc_group)) = wuc_mask;
}
/* Enable GPIO interrupt */
irq_connect_dynamic(gpio_irq, 0, gpio_ite_isr, dev, 0);
irq_enable(gpio_irq);
return 0;
}
static const struct gpio_driver_api gpio_ite_driver_api = {
.pin_configure = gpio_ite_configure,
#ifdef CONFIG_GPIO_GET_CONFIG
.pin_get_config = gpio_ite_get_config,
#endif
.port_get_raw = gpio_ite_port_get_raw,
.port_set_masked_raw = gpio_ite_port_set_masked_raw,
.port_set_bits_raw = gpio_ite_port_set_bits_raw,
.port_clear_bits_raw = gpio_ite_port_clear_bits_raw,
.port_toggle_bits = gpio_ite_port_toggle_bits,
.pin_interrupt_configure = gpio_ite_pin_interrupt_configure,
.manage_callback = gpio_ite_manage_callback,
};
#define GPIO_ITE_DEV_CFG_DATA(inst) \
static struct gpio_ite_data gpio_ite_data_##inst; \
static const struct gpio_ite_cfg gpio_ite_cfg_##inst = { \
.common = { \
.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_NGPIOS( \
DT_INST_PROP(inst, ngpios)) \
}, \
.reg_gpdr = DT_INST_REG_ADDR_BY_IDX(inst, 0), \
.reg_gpcr = DT_INST_REG_ADDR_BY_IDX(inst, 1), \
.reg_gpdmr = DT_INST_REG_ADDR_BY_IDX(inst, 2), \
.reg_gpotr = DT_INST_REG_ADDR_BY_IDX(inst, 3), \
.index = (uint8_t)(DT_INST_REG_ADDR(inst) - \
DT_REG_ADDR(DT_NODELABEL(gpioa))), \
.gpio_irq[0] = DT_INST_IRQ_BY_IDX(inst, 0, irq), \
.gpio_irq[1] = DT_INST_IRQ_BY_IDX(inst, 1, irq), \
.gpio_irq[2] = DT_INST_IRQ_BY_IDX(inst, 2, irq), \
.gpio_irq[3] = DT_INST_IRQ_BY_IDX(inst, 3, irq), \
.gpio_irq[4] = DT_INST_IRQ_BY_IDX(inst, 4, irq), \
.gpio_irq[5] = DT_INST_IRQ_BY_IDX(inst, 5, irq), \
.gpio_irq[6] = DT_INST_IRQ_BY_IDX(inst, 6, irq), \
.gpio_irq[7] = DT_INST_IRQ_BY_IDX(inst, 7, irq), \
}; \
DEVICE_DT_INST_DEFINE(inst, \
NULL, \
NULL, \
&gpio_ite_data_##inst, \
&gpio_ite_cfg_##inst, \
PRE_KERNEL_1, \
CONFIG_GPIO_INIT_PRIORITY, \
&gpio_ite_driver_api);
DT_INST_FOREACH_STATUS_OKAY(GPIO_ITE_DEV_CFG_DATA)
static int gpio_it8xxx2_init_set(void)
{
if (IS_ENABLED(CONFIG_SOC_IT8XXX2_GPIO_GROUP_K_L_DEFAULT_PULL_DOWN)) {
const struct device *const gpiok = DEVICE_DT_GET(DT_NODELABEL(gpiok));
const struct device *const gpiol = DEVICE_DT_GET(DT_NODELABEL(gpiol));
for (int i = 0; i < 8; i++) {
gpio_pin_configure(gpiok, i, GPIO_INPUT | GPIO_PULL_DOWN);
gpio_pin_configure(gpiol, i, GPIO_INPUT | GPIO_PULL_DOWN);
}
}
if (IS_ENABLED(CONFIG_SOC_IT8XXX2_GPIO_H7_DEFAULT_OUTPUT_LOW)) {
const struct device *const gpioh = DEVICE_DT_GET(DT_NODELABEL(gpioh));
gpio_pin_configure(gpioh, 7, GPIO_OUTPUT_LOW);
}
return 0;
}
SYS_INIT(gpio_it8xxx2_init_set, PRE_KERNEL_1, CONFIG_GPIO_INIT_PRIORITY);
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