blob: 17115a23e1a6e960143a1750e395664fec7ea541 [file] [log] [blame]
/*
* Copyright (c) 2016 Intel Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <errno.h>
#include <gpio.h>
#include <board.h>
#include <misc/util.h>
#include "qm_ss_gpio.h"
#include "qm_ss_isr.h"
#include "ss_clk.h"
#include "gpio_utils.h"
struct ss_gpio_qmsi_config {
qm_ss_gpio_t gpio;
u8_t num_pins;
};
struct ss_gpio_qmsi_runtime {
sys_slist_t callbacks;
u32_t pin_callbacks;
#ifdef CONFIG_GPIO_QMSI_API_REENTRANCY
struct k_sem sem;
#endif /* CONFIG_GPIO_QMSI_API_REENTRANCY */
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
u32_t device_power_state;
qm_ss_gpio_context_t gpio_ctx;
#endif
};
#ifdef CONFIG_GPIO_QMSI_API_REENTRANCY
#define RP_GET(dev) (&((struct ss_gpio_qmsi_runtime *)(dev->driver_data))->sem)
#else
#define RP_GET(context) (NULL)
#endif /* CONFIG_GPIO_QMSI_API_REENTRANCY */
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
static void ss_gpio_qmsi_set_power_state(struct device *dev,
u32_t power_state)
{
struct ss_gpio_qmsi_runtime *context = dev->driver_data;
context->device_power_state = power_state;
}
static u32_t ss_gpio_qmsi_get_power_state(struct device *dev)
{
struct ss_gpio_qmsi_runtime *context = dev->driver_data;
return context->device_power_state;
}
static int ss_gpio_suspend_device(struct device *dev)
{
const struct ss_gpio_qmsi_config *gpio_config =
dev->config->config_info;
struct ss_gpio_qmsi_runtime *drv_data = dev->driver_data;
qm_ss_gpio_save_context(gpio_config->gpio, &drv_data->gpio_ctx);
ss_gpio_qmsi_set_power_state(dev, DEVICE_PM_SUSPEND_STATE);
return 0;
}
static int ss_gpio_resume_device_from_suspend(struct device *dev)
{
const struct ss_gpio_qmsi_config *gpio_config =
dev->config->config_info;
struct ss_gpio_qmsi_runtime *drv_data = dev->driver_data;
qm_ss_gpio_restore_context(gpio_config->gpio, &drv_data->gpio_ctx);
ss_gpio_qmsi_set_power_state(dev, DEVICE_PM_ACTIVE_STATE);
return 0;
}
/*
* Implements the driver control management functionality
* the *context may include IN data or/and OUT data
*/
static int ss_gpio_qmsi_device_ctrl(struct device *port, u32_t ctrl_command,
void *context)
{
if (ctrl_command == DEVICE_PM_SET_POWER_STATE) {
if (*((u32_t *)context) == DEVICE_PM_SUSPEND_STATE) {
return ss_gpio_suspend_device(port);
} else if (*((u32_t *)context) == DEVICE_PM_ACTIVE_STATE) {
return ss_gpio_resume_device_from_suspend(port);
}
} else if (ctrl_command == DEVICE_PM_GET_POWER_STATE) {
*((u32_t *)context) = ss_gpio_qmsi_get_power_state(port);
}
return 0;
}
#else
#define ss_gpio_qmsi_set_power_state(...)
#endif /* CONFIG_DEVICE_POWER_MANAGEMENT */
static int ss_gpio_qmsi_init(struct device *dev);
#ifdef CONFIG_GPIO_QMSI_SS_0
static const struct ss_gpio_qmsi_config ss_gpio_0_config = {
.gpio = QM_SS_GPIO_0,
.num_pins = QM_SS_GPIO_NUM_PINS,
};
static struct ss_gpio_qmsi_runtime ss_gpio_0_runtime;
DEVICE_DEFINE(ss_gpio_0, CONFIG_GPIO_QMSI_SS_0_NAME, &ss_gpio_qmsi_init,
ss_gpio_qmsi_device_ctrl, &ss_gpio_0_runtime, &ss_gpio_0_config,
POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE, NULL);
#endif /* CONFIG_GPIO_QMSI_SS_0 */
#ifdef CONFIG_GPIO_QMSI_SS_1
static const struct ss_gpio_qmsi_config ss_gpio_1_config = {
.gpio = QM_SS_GPIO_1,
.num_pins = QM_SS_GPIO_NUM_PINS,
};
static struct ss_gpio_qmsi_runtime gpio_1_runtime;
DEVICE_DEFINE(ss_gpio_1, CONFIG_GPIO_QMSI_SS_1_NAME, &ss_gpio_qmsi_init,
ss_gpio_qmsi_device_ctrl, &gpio_1_runtime, &ss_gpio_1_config,
POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE, NULL);
#endif /* CONFIG_GPIO_QMSI_SS_1 */
static void ss_gpio_qmsi_callback(void *data, u32_t status)
{
struct device *port = data;
struct ss_gpio_qmsi_runtime *context = port->driver_data;
const u32_t enabled_mask = context->pin_callbacks & status;
if (enabled_mask) {
_gpio_fire_callbacks(&context->callbacks, port, enabled_mask);
}
}
static void ss_qmsi_write_bit(u32_t *target, u8_t bit, u8_t value)
{
if (value) {
sys_set_bit((uintptr_t) target, bit);
} else {
sys_clear_bit((uintptr_t) target, bit);
}
}
static inline void ss_qmsi_pin_config(struct device *port, u32_t pin,
int flags)
{
const struct ss_gpio_qmsi_config *gpio_config =
port->config->config_info;
qm_ss_gpio_t gpio = gpio_config->gpio;
u32_t controller;
qm_ss_gpio_port_config_t cfg = { 0 };
switch (gpio) {
#ifdef CONFIG_GPIO_QMSI_SS_0
case QM_SS_GPIO_0:
controller = QM_SS_GPIO_0_BASE;
break;
#endif /* CONFIG_GPIO_QMSI_SS_0 */
#ifdef CONFIG_GPIO_QMSI_SS_1
case QM_SS_GPIO_1:
controller = QM_SS_GPIO_1_BASE;
break;
#endif /* CONFIG_GPIO_QMSI_SS_1 */
default:
return;
}
cfg.direction = __builtin_arc_lr(controller + QM_SS_GPIO_SWPORTA_DDR);
cfg.int_en = __builtin_arc_lr(controller + QM_SS_GPIO_INTEN);
cfg.int_type = __builtin_arc_lr(controller + QM_SS_GPIO_INTTYPE_LEVEL);
cfg.int_polarity =
__builtin_arc_lr(controller + QM_SS_GPIO_INT_POLARITY);
cfg.int_debounce = __builtin_arc_lr(controller + QM_SS_GPIO_DEBOUNCE);
cfg.callback = ss_gpio_qmsi_callback;
cfg.callback_data = port;
ss_qmsi_write_bit(&cfg.direction, pin, (flags & GPIO_DIR_MASK));
if (flags & GPIO_INT) {
ss_qmsi_write_bit(&cfg.int_type, pin, (flags & GPIO_INT_EDGE));
ss_qmsi_write_bit(&cfg.int_polarity, pin,
(flags & GPIO_INT_ACTIVE_HIGH));
ss_qmsi_write_bit(&cfg.int_debounce, pin,
(flags & GPIO_INT_DEBOUNCE));
ss_qmsi_write_bit(&cfg.int_en, pin, 1);
} else {
ss_qmsi_write_bit(&cfg.int_en, pin, 0);
}
if (IS_ENABLED(CONFIG_GPIO_QMSI_API_REENTRANCY)) {
k_sem_take(RP_GET(port), K_FOREVER);
}
qm_ss_gpio_set_config(gpio, &cfg);
if (IS_ENABLED(CONFIG_GPIO_QMSI_API_REENTRANCY)) {
k_sem_give(RP_GET(port));
}
}
static inline void ss_qmsi_port_config(struct device *port, int flags)
{
const struct ss_gpio_qmsi_config *gpio_config =
port->config->config_info;
u8_t num_pins = gpio_config->num_pins;
int i;
for (i = 0; i < num_pins; i++) {
ss_qmsi_pin_config(port, i, flags);
}
}
static inline int ss_gpio_qmsi_config(struct device *port, int access_op,
u32_t pin, int flags)
{
/* check for an invalid pin configuration */
if ((flags & GPIO_INT) && (flags & GPIO_DIR_OUT)) {
return -EINVAL;
}
if (access_op == GPIO_ACCESS_BY_PIN) {
ss_qmsi_pin_config(port, pin, flags);
} else {
ss_qmsi_port_config(port, flags);
}
return 0;
}
static inline int ss_gpio_qmsi_write(struct device *port, int access_op,
u32_t pin, u32_t value)
{
const struct ss_gpio_qmsi_config *gpio_config =
port->config->config_info;
qm_ss_gpio_t gpio = gpio_config->gpio;
if (IS_ENABLED(CONFIG_GPIO_QMSI_API_REENTRANCY)) {
k_sem_take(RP_GET(port), K_FOREVER);
}
if (access_op == GPIO_ACCESS_BY_PIN) {
if (value) {
qm_ss_gpio_set_pin(gpio, pin);
} else {
qm_ss_gpio_clear_pin(gpio, pin);
}
} else {
qm_ss_gpio_write_port(gpio, value);
}
if (IS_ENABLED(CONFIG_GPIO_QMSI_API_REENTRANCY)) {
k_sem_give(RP_GET(port));
}
return 0;
}
static inline int ss_gpio_qmsi_read(struct device *port, int access_op,
u32_t pin, u32_t *value)
{
const struct ss_gpio_qmsi_config *gpio_config =
port->config->config_info;
qm_ss_gpio_t gpio = gpio_config->gpio;
qm_ss_gpio_state_t state;
if (access_op == GPIO_ACCESS_BY_PIN) {
qm_ss_gpio_read_pin(gpio, pin, &state);
*value = state;
} else {
qm_ss_gpio_read_port(gpio, value);
}
return 0;
}
static inline int ss_gpio_qmsi_manage_callback(struct device *port,
struct gpio_callback *callback,
bool set)
{
struct ss_gpio_qmsi_runtime *context = port->driver_data;
_gpio_manage_callback(&context->callbacks, callback, set);
return 0;
}
static inline int ss_gpio_qmsi_enable_callback(struct device *port,
int access_op, u32_t pin)
{
struct ss_gpio_qmsi_runtime *context = port->driver_data;
if (IS_ENABLED(CONFIG_GPIO_QMSI_API_REENTRANCY)) {
k_sem_take(RP_GET(port), K_FOREVER);
}
if (access_op == GPIO_ACCESS_BY_PIN) {
context->pin_callbacks |= BIT(pin);
} else {
context->pin_callbacks = 0xffffffff;
}
if (IS_ENABLED(CONFIG_GPIO_QMSI_API_REENTRANCY)) {
k_sem_give(RP_GET(port));
}
return 0;
}
static inline int ss_gpio_qmsi_disable_callback(struct device *port,
int access_op, u32_t pin)
{
struct ss_gpio_qmsi_runtime *context = port->driver_data;
if (IS_ENABLED(CONFIG_GPIO_QMSI_API_REENTRANCY)) {
k_sem_take(RP_GET(port), K_FOREVER);
}
if (access_op == GPIO_ACCESS_BY_PIN) {
context->pin_callbacks &= ~BIT(pin);
} else {
context->pin_callbacks = 0;
}
if (IS_ENABLED(CONFIG_GPIO_QMSI_API_REENTRANCY)) {
k_sem_give(RP_GET(port));
}
return 0;
}
static const struct gpio_driver_api api_funcs = {
.config = ss_gpio_qmsi_config,
.write = ss_gpio_qmsi_write,
.read = ss_gpio_qmsi_read,
.manage_callback = ss_gpio_qmsi_manage_callback,
.enable_callback = ss_gpio_qmsi_enable_callback,
.disable_callback = ss_gpio_qmsi_disable_callback,
};
void ss_gpio_isr(void *arg)
{
struct device *port = arg;
const struct ss_gpio_qmsi_config *gpio_config =
port->config->config_info;
if (gpio_config->gpio == QM_SS_GPIO_0) {
qm_ss_gpio_0_isr(NULL);
} else {
qm_ss_gpio_1_isr(NULL);
}
}
static int ss_gpio_qmsi_init(struct device *port)
{
const struct ss_gpio_qmsi_config *gpio_config =
port->config->config_info;
u32_t *scss_intmask = NULL;
if (IS_ENABLED(CONFIG_GPIO_QMSI_API_REENTRANCY)) {
k_sem_init(RP_GET(port), 1, UINT_MAX);
}
switch (gpio_config->gpio) {
#ifdef CONFIG_GPIO_QMSI_SS_0
case QM_SS_GPIO_0:
IRQ_CONNECT(IRQ_GPIO0_INTR,
CONFIG_GPIO_QMSI_SS_0_IRQ_PRI, ss_gpio_isr,
DEVICE_GET(ss_gpio_0), 0);
irq_enable(IRQ_GPIO0_INTR);
ss_clk_gpio_enable(QM_SS_GPIO_0);
scss_intmask =
(u32_t *)&QM_INTERRUPT_ROUTER->ss_gpio_0_int_mask;
*scss_intmask &= ~BIT(8);
break;
#endif /* CONFIG_GPIO_QMSI_SS_0 */
#ifdef CONFIG_GPIO_QMSI_SS_1
case QM_SS_GPIO_1:
IRQ_CONNECT(IRQ_GPIO1_INTR,
CONFIG_GPIO_QMSI_SS_1_IRQ_PRI, ss_gpio_isr,
DEVICE_GET(ss_gpio_1), 0);
irq_enable(IRQ_GPIO1_INTR);
ss_clk_gpio_enable(QM_SS_GPIO_1);
scss_intmask =
(u32_t *)&QM_INTERRUPT_ROUTER->ss_gpio_1_int_mask;
*scss_intmask &= ~BIT(8);
break;
#endif /* CONFIG_GPIO_QMSI_SS_1 */
default:
return -EIO;
}
ss_gpio_qmsi_set_power_state(port, DEVICE_PM_ACTIVE_STATE);
port->driver_api = &api_funcs;
return 0;
}