272 lines
7.4 KiB
C
272 lines
7.4 KiB
C
/*
|
|
* Copyright (c) 2018 Zilogic Systems.
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#define DT_DRV_COMPAT ti_stellaris_gpio
|
|
|
|
#include <errno.h>
|
|
#include <device.h>
|
|
#include <drivers/gpio.h>
|
|
#include <soc.h>
|
|
#include <sys/sys_io.h>
|
|
#include "gpio_utils.h"
|
|
|
|
typedef void (*config_func_t)(const struct device *dev);
|
|
|
|
struct gpio_stellaris_config {
|
|
/* gpio_driver_config needs to be first */
|
|
struct gpio_driver_config common;
|
|
uint32_t base;
|
|
uint32_t port_map;
|
|
config_func_t config_func;
|
|
};
|
|
|
|
struct gpio_stellaris_runtime {
|
|
/* gpio_driver_data needs to be first */
|
|
struct gpio_driver_data common;
|
|
sys_slist_t cb;
|
|
};
|
|
|
|
#define DEV_CFG(dev) \
|
|
((const struct gpio_stellaris_config *const) \
|
|
(dev)->config)
|
|
|
|
#define DEV_DATA(dev) \
|
|
((struct gpio_stellaris_runtime *const) \
|
|
(dev)->data)
|
|
|
|
#define GPIO_REG_ADDR(base, offset) (base + offset)
|
|
|
|
#define GPIO_RW_ADDR(base, offset, p) \
|
|
(GPIO_REG_ADDR(base, offset) | (1 << (p + 2)))
|
|
|
|
#define GPIO_RW_MASK_ADDR(base, offset, mask) \
|
|
(GPIO_REG_ADDR(base, offset) | (mask << 2))
|
|
|
|
enum gpio_regs {
|
|
GPIO_DATA_OFFSET = 0x000,
|
|
GPIO_DIR_OFFSET = 0x400,
|
|
GPIO_DEN_OFFSET = 0x51C,
|
|
GPIO_IS_OFFSET = 0x404,
|
|
GPIO_IBE_OFFSET = 0x408,
|
|
GPIO_IEV_OFFSET = 0x40C,
|
|
GPIO_IM_OFFSET = 0x410,
|
|
GPIO_MIS_OFFSET = 0x418,
|
|
GPIO_ICR_OFFSET = 0x41C,
|
|
};
|
|
|
|
static void gpio_stellaris_isr(const struct device *dev)
|
|
{
|
|
const struct gpio_stellaris_config * const cfg = DEV_CFG(dev);
|
|
struct gpio_stellaris_runtime *context = DEV_DATA(dev);
|
|
uint32_t base = cfg->base;
|
|
uint32_t int_stat = sys_read32(GPIO_REG_ADDR(base, GPIO_MIS_OFFSET));
|
|
|
|
gpio_fire_callbacks(&context->cb, dev, int_stat);
|
|
|
|
sys_write32(int_stat, GPIO_REG_ADDR(base, GPIO_ICR_OFFSET));
|
|
}
|
|
|
|
static int gpio_stellaris_configure(const struct device *dev,
|
|
gpio_pin_t pin, gpio_flags_t flags)
|
|
{
|
|
const struct gpio_stellaris_config *cfg = DEV_CFG(dev);
|
|
uint32_t base = cfg->base;
|
|
uint32_t port_map = cfg->port_map;
|
|
|
|
if ((flags & (GPIO_PULL_UP | GPIO_PULL_DOWN)) != 0) {
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
if ((flags & GPIO_SINGLE_ENDED) != 0) {
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
/* Check for pin availability */
|
|
if (!sys_test_bit((uint32_t)&port_map, pin)) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
if ((flags & GPIO_OUTPUT) != 0) {
|
|
mm_reg_t mask_addr;
|
|
|
|
mask_addr = GPIO_RW_MASK_ADDR(base, GPIO_DATA_OFFSET, BIT(pin));
|
|
if ((flags & GPIO_OUTPUT_INIT_HIGH) != 0) {
|
|
sys_write32(BIT(pin), mask_addr);
|
|
} else if ((flags & GPIO_OUTPUT_INIT_LOW) != 0) {
|
|
sys_write32(0, mask_addr);
|
|
}
|
|
sys_set_bit(GPIO_REG_ADDR(base, GPIO_DIR_OFFSET), pin);
|
|
/* Pin digital enable */
|
|
sys_set_bit(GPIO_REG_ADDR(base, GPIO_DEN_OFFSET), pin);
|
|
} else if ((flags & GPIO_INPUT) != 0) {
|
|
sys_clear_bit(GPIO_REG_ADDR(base, GPIO_DIR_OFFSET), pin);
|
|
/* Pin digital enable */
|
|
sys_set_bit(GPIO_REG_ADDR(base, GPIO_DEN_OFFSET), pin);
|
|
} else {
|
|
/* Pin digital disable */
|
|
sys_clear_bit(GPIO_REG_ADDR(base, GPIO_DEN_OFFSET), pin);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gpio_stellaris_port_get_raw(const struct device *dev,
|
|
uint32_t *value)
|
|
{
|
|
const struct gpio_stellaris_config *cfg = DEV_CFG(dev);
|
|
uint32_t base = cfg->base;
|
|
|
|
*value = sys_read32(GPIO_RW_MASK_ADDR(base, GPIO_DATA_OFFSET, 0xff));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gpio_stellaris_port_set_masked_raw(const struct device *dev,
|
|
uint32_t mask,
|
|
uint32_t value)
|
|
{
|
|
const struct gpio_stellaris_config *cfg = DEV_CFG(dev);
|
|
uint32_t base = cfg->base;
|
|
|
|
sys_write32(value, GPIO_RW_MASK_ADDR(base, GPIO_DATA_OFFSET, mask));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gpio_stellaris_port_set_bits_raw(const struct device *dev,
|
|
uint32_t mask)
|
|
{
|
|
const struct gpio_stellaris_config *cfg = DEV_CFG(dev);
|
|
uint32_t base = cfg->base;
|
|
|
|
sys_write32(mask, GPIO_RW_MASK_ADDR(base, GPIO_DATA_OFFSET, mask));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gpio_stellaris_port_clear_bits_raw(const struct device *dev,
|
|
uint32_t mask)
|
|
{
|
|
const struct gpio_stellaris_config *cfg = DEV_CFG(dev);
|
|
uint32_t base = cfg->base;
|
|
|
|
sys_write32(0, GPIO_RW_MASK_ADDR(base, GPIO_DATA_OFFSET, mask));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gpio_stellaris_port_toggle_bits(const struct device *dev,
|
|
uint32_t mask)
|
|
{
|
|
const struct gpio_stellaris_config *cfg = DEV_CFG(dev);
|
|
uint32_t base = cfg->base;
|
|
uint32_t value;
|
|
|
|
value = sys_read32(GPIO_RW_MASK_ADDR(base, GPIO_DATA_OFFSET, 0xff));
|
|
value ^= mask;
|
|
sys_write32(value, GPIO_RW_MASK_ADDR(base, GPIO_DATA_OFFSET, 0xff));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gpio_stellaris_pin_interrupt_configure(const struct device *dev,
|
|
gpio_pin_t pin,
|
|
enum gpio_int_mode mode,
|
|
enum gpio_int_trig trig)
|
|
{
|
|
const struct gpio_stellaris_config *cfg = DEV_CFG(dev);
|
|
uint32_t base = cfg->base;
|
|
|
|
/* Check if GPIO port needs interrupt support */
|
|
if (mode == GPIO_INT_MODE_DISABLED) {
|
|
/* Set the mask to disable the interrupt */
|
|
sys_set_bit(GPIO_REG_ADDR(base, GPIO_IM_OFFSET), pin);
|
|
} else {
|
|
if (mode == GPIO_INT_MODE_EDGE) {
|
|
sys_clear_bit(GPIO_REG_ADDR(base, GPIO_IS_OFFSET), pin);
|
|
} else {
|
|
sys_set_bit(GPIO_REG_ADDR(base, GPIO_IS_OFFSET), pin);
|
|
}
|
|
|
|
if (trig == GPIO_INT_TRIG_BOTH) {
|
|
sys_set_bit(GPIO_REG_ADDR(base, GPIO_IBE_OFFSET), pin);
|
|
} else if (trig == GPIO_INT_TRIG_HIGH) {
|
|
sys_set_bit(GPIO_REG_ADDR(base, GPIO_IEV_OFFSET), pin);
|
|
} else {
|
|
sys_clear_bit(GPIO_REG_ADDR(base,
|
|
GPIO_IEV_OFFSET), pin);
|
|
}
|
|
/* Clear the Mask to enable the interrupt */
|
|
sys_clear_bit(GPIO_REG_ADDR(base, GPIO_IM_OFFSET), pin);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gpio_stellaris_init(const struct device *dev)
|
|
{
|
|
const struct gpio_stellaris_config *cfg = DEV_CFG(dev);
|
|
|
|
cfg->config_func(dev);
|
|
return 0;
|
|
}
|
|
|
|
static int gpio_stellaris_manage_callback(const struct device *dev,
|
|
struct gpio_callback *callback,
|
|
bool set)
|
|
{
|
|
struct gpio_stellaris_runtime *context = DEV_DATA(dev);
|
|
|
|
gpio_manage_callback(&context->cb, callback, set);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct gpio_driver_api gpio_stellaris_driver_api = {
|
|
.pin_configure = gpio_stellaris_configure,
|
|
.port_get_raw = gpio_stellaris_port_get_raw,
|
|
.port_set_masked_raw = gpio_stellaris_port_set_masked_raw,
|
|
.port_set_bits_raw = gpio_stellaris_port_set_bits_raw,
|
|
.port_clear_bits_raw = gpio_stellaris_port_clear_bits_raw,
|
|
.port_toggle_bits = gpio_stellaris_port_toggle_bits,
|
|
.pin_interrupt_configure = gpio_stellaris_pin_interrupt_configure,
|
|
.manage_callback = gpio_stellaris_manage_callback,
|
|
};
|
|
|
|
#define STELLARIS_GPIO_DEVICE(n) \
|
|
static void port_## n ##_stellaris_config_func(const struct device *dev); \
|
|
\
|
|
static struct gpio_stellaris_runtime port_## n ##_stellaris_runtime; \
|
|
\
|
|
static const struct gpio_stellaris_config gpio_stellaris_port_## n ##_config = {\
|
|
.common = { \
|
|
.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(n), \
|
|
}, \
|
|
.base = DT_INST_REG_ADDR(n), \
|
|
.port_map = BIT_MASK(DT_INST_PROP(n, ngpios)), \
|
|
.config_func = port_## n ##_stellaris_config_func, \
|
|
}; \
|
|
\
|
|
DEVICE_DT_INST_DEFINE(n, \
|
|
gpio_stellaris_init, \
|
|
device_pm_control_nop, \
|
|
&port_## n ##_stellaris_runtime, \
|
|
&gpio_stellaris_port_## n ##_config, \
|
|
POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT, \
|
|
&gpio_stellaris_driver_api); \
|
|
\
|
|
static void port_## n ##_stellaris_config_func(const struct device *dev) \
|
|
{ \
|
|
IRQ_CONNECT(DT_INST_IRQN(n), \
|
|
DT_INST_IRQ(n, priority), \
|
|
gpio_stellaris_isr, \
|
|
DEVICE_DT_INST_GET(n), 0); \
|
|
\
|
|
irq_enable(DT_INST_IRQN(n)); \
|
|
}
|
|
|
|
DT_INST_FOREACH_STATUS_OKAY(STELLARIS_GPIO_DEVICE)
|