blob: 5726ed1bf32e83bbcc7d69dab57b05e006c609c3 [file] [log] [blame]
/*
* Copyright (C) 2023 BeagleBoard.org Foundation
* Copyright (C) 2023 S Prashanth
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT ti_davinci_gpio
#include <errno.h>
#include <zephyr/arch/common/sys_bitops.h>
#include <zephyr/device.h>
#include <zephyr/devicetree.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/drivers/gpio/gpio_utils.h>
#include <zephyr/init.h>
#include <zephyr/kernel.h>
#include <zephyr/sys/sys_io.h>
/* Helper Macros for GPIO */
#define DEV_CFG(dev) \
((const struct gpio_davinci_config * const)((dev)->config))
#define DEV_DATA(dev) ((struct gpio_davinci_data *)(dev)->data)
#define DEV_GPIO_CFG_BASE(dev) \
((struct gpio_davinci_regs *)DEVICE_MMIO_NAMED_GET(dev, port_base))
#define GPIO_DAVINCI_DIR_RESET_VAL (0xFFFFFFFF)
struct gpio_davinci_regs {
uint32_t dir;
uint32_t out_data;
uint32_t set_data;
uint32_t clr_data;
uint32_t in_data;
uint32_t set_ris_trig;
uint32_t clr_ris_trig;
uint32_t set_fal_trig;
uint32_t clr_fal_trig;
uint32_t intstat;
};
struct gpio_davinci_data {
struct gpio_driver_data common;
DEVICE_MMIO_NAMED_RAM(port_base);
sys_slist_t cb;
};
struct gpio_davinci_config {
void (*bank_config)(const struct device *dev);
struct gpio_driver_config common;
DEVICE_MMIO_NAMED_ROM(port_base);
uint32_t port_num;
};
static int gpio_davinci_configure(const struct device *dev, gpio_pin_t pin,
gpio_flags_t flags)
{
volatile struct gpio_davinci_regs *regs = DEV_GPIO_CFG_BASE(dev);
if ((flags & GPIO_SINGLE_ENDED) != 0) {
return -ENOTSUP;
}
if ((flags & (GPIO_PULL_UP | GPIO_PULL_DOWN)) != 0) {
return -ENOTSUP;
}
if ((flags & GPIO_OUTPUT) != 0) {
if ((flags & GPIO_OUTPUT_INIT_HIGH) != 0) {
regs->set_data = BIT(pin);
} else {
regs->clr_data = BIT(pin);
}
regs->dir &= (~(BIT(pin)));
} else {
regs->dir |= (BIT(pin));
}
return 0;
}
static int gpio_davinci_port_get_raw(const struct device *dev,
gpio_port_value_t *value)
{
volatile struct gpio_davinci_regs *regs = DEV_GPIO_CFG_BASE(dev);
*value = regs->in_data;
return 0;
}
static int gpio_davinci_port_set_masked_raw(const struct device *dev,
gpio_port_pins_t mask, gpio_port_value_t value)
{
volatile struct gpio_davinci_regs *regs = DEV_GPIO_CFG_BASE(dev);
regs->out_data = (regs->out_data & (~mask)) | (mask & value);
return 0;
}
static int gpio_davinci_port_set_bits_raw(const struct device *dev,
gpio_port_pins_t mask)
{
volatile struct gpio_davinci_regs *regs = DEV_GPIO_CFG_BASE(dev);
regs->set_data |= mask;
return 0;
}
static int gpio_davinci_port_clear_bits_raw(const struct device *dev,
gpio_port_pins_t mask)
{
volatile struct gpio_davinci_regs *regs = DEV_GPIO_CFG_BASE(dev);
regs->clr_data |= mask;
return 0;
}
static int gpio_davinci_port_toggle_bits(const struct device *dev,
gpio_port_pins_t mask)
{
volatile struct gpio_davinci_regs *regs = DEV_GPIO_CFG_BASE(dev);
regs->out_data ^= mask;
return 0;
}
static const struct gpio_driver_api gpio_davinci_driver_api = {
.pin_configure = gpio_davinci_configure,
.port_get_raw = gpio_davinci_port_get_raw,
.port_set_masked_raw = gpio_davinci_port_set_masked_raw,
.port_set_bits_raw = gpio_davinci_port_set_bits_raw,
.port_clear_bits_raw = gpio_davinci_port_clear_bits_raw,
.port_toggle_bits = gpio_davinci_port_toggle_bits
};
static int gpio_davinci_init(const struct device *dev)
{
const struct gpio_davinci_config *config = DEV_CFG(dev);
volatile struct gpio_davinci_regs *regs = DEV_GPIO_CFG_BASE(dev);
DEVICE_MMIO_NAMED_MAP(dev, port_base, K_MEM_CACHE_NONE);
regs->dir = GPIO_DAVINCI_DIR_RESET_VAL;
config->bank_config(dev);
return 0;
}
#define GPIO_DAVINCI_INIT_FUNC(n) \
static void gpio_davinci_bank_##n##_config(const struct device *dev) \
{ \
volatile struct gpio_davinci_regs *regs = DEV_GPIO_CFG_BASE(dev); \
ARG_UNUSED(regs); \
}
#define GPIO_DAVINCI_DEVICE_INIT(n) \
DEVICE_DT_INST_DEFINE(n, &gpio_davinci_##n##_init, \
NULL, &gpio_davinci_##n##_data, \
&gpio_davinci_##n##_config, \
POST_KERNEL, CONFIG_GPIO_INIT_PRIORITY, \
&api_funcs)
#define GPIO_DAVINCI_INIT(n) \
\
GPIO_DAVINCI_INIT_FUNC(n) \
static const struct gpio_davinci_config gpio_davinci_##n##_config = { \
.bank_config = gpio_davinci_bank_##n##_config, \
.common = { \
.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(n), \
}, \
DEVICE_MMIO_NAMED_ROM_INIT(port_base, DT_DRV_INST(n)), \
.port_num = n \
}; \
\
static struct gpio_davinci_data gpio_davinci_##n##_data; \
\
DEVICE_DT_INST_DEFINE(n, \
&gpio_davinci_init, \
NULL, \
&gpio_davinci_##n##_data, \
&gpio_davinci_##n##_config, \
PRE_KERNEL_2, \
CONFIG_GPIO_INIT_PRIORITY, \
&gpio_davinci_driver_api);
DT_INST_FOREACH_STATUS_OKAY(GPIO_DAVINCI_INIT)