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/*
* Copyright (c) 2015 Intel Corporation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <errno.h>
#include <nanokernel.h>
#include <device.h>
#include <shared_irq.h>
#include <init.h>
#include <board.h>
#include <sys_io.h>
#ifdef CONFIG_IOAPIC
#include <drivers/ioapic.h>
#endif
/**
* @brief Register a device ISR
* @param dev Pointer to device structure for SHARED_IRQ driver instance.
* @param isr_func Pointer to the ISR function for the device.
* @param isr_dev Pointer to the device that will service the interrupt.
*/
static int isr_register(struct device *dev, isr_t isr_func,
struct device *isr_dev)
{
struct shared_irq_runtime *clients = dev->driver_data;
struct shared_irq_config *config = dev->config->config_info;
uint32_t i;
for (i = 0; i < config->client_count; i++) {
if (!clients->client[i].isr_dev) {
clients->client[i].isr_dev = isr_dev;
clients->client[i].isr_func = isr_func;
return 0;
}
}
return -EIO;
}
/**
* @brief Enable ISR for device
* @param dev Pointer to device structure for SHARED_IRQ driver instance.
* @param isr_dev Pointer to the device that will service the interrupt.
*/
static inline int enable(struct device *dev, struct device *isr_dev)
{
struct shared_irq_runtime *clients = dev->driver_data;
struct shared_irq_config *config = dev->config->config_info;
uint32_t i;
for (i = 0; i < config->client_count; i++) {
if (clients->client[i].isr_dev == isr_dev) {
clients->client[i].enabled = 1;
irq_enable(config->irq_num);
return 0;
}
}
return -EIO;
}
static int last_enabled_isr(struct shared_irq_runtime *clients, int count)
{
uint32_t i;
for (i = 0; i < count; i++) {
if (clients->client[i].enabled) {
return 0;
}
}
return 1;
}
/**
* @brief Disable ISR for device
* @param dev Pointer to device structure for SHARED_IRQ driver instance.
* @param isr_dev Pointer to the device that will service the interrupt.
*/
static inline int disable(struct device *dev, struct device *isr_dev)
{
struct shared_irq_runtime *clients = dev->driver_data;
struct shared_irq_config *config = dev->config->config_info;
uint32_t i;
for (i = 0; i < config->client_count; i++) {
if (clients->client[i].isr_dev == isr_dev) {
clients->client[i].enabled = 0;
if (last_enabled_isr(clients, config->client_count)) {
irq_disable(config->irq_num);
}
return 0;
}
}
return -EIO;
}
void shared_irq_isr(struct device *dev)
{
struct shared_irq_runtime *clients = dev->driver_data;
struct shared_irq_config *config = dev->config->config_info;
uint32_t i;
for (i = 0; i < config->client_count; i++) {
if (clients->client[i].isr_dev) {
clients->client[i].isr_func(clients->client[i].isr_dev);
}
}
}
static struct shared_irq_driver_api api_funcs = {
.isr_register = isr_register,
.enable = enable,
.disable = disable,
};
int shared_irq_initialize(struct device *dev)
{
struct shared_irq_config *config = dev->config->config_info;
dev->driver_api = &api_funcs;
config->config();
return 0;
}
#if CONFIG_SHARED_IRQ_0
void shared_irq_config_0_irq(void);
struct shared_irq_config shared_irq_config_0 = {
.irq_num = CONFIG_SHARED_IRQ_0_IRQ,
.client_count = CONFIG_SHARED_IRQ_NUM_CLIENTS,
.config = shared_irq_config_0_irq
};
struct shared_irq_runtime shared_irq_0_runtime;
DEVICE_INIT(shared_irq_0, CONFIG_SHARED_IRQ_0_NAME, shared_irq_initialize,
&shared_irq_0_runtime, &shared_irq_config_0,
SECONDARY, CONFIG_SHARED_IRQ_INIT_PRIORITY);
#if defined(CONFIG_IOAPIC)
#if defined(CONFIG_SHARED_IRQ_0)
#if defined(CONFIG_SHARED_IRQ_0_FALLING_EDGE)
#define SHARED_IRQ_0_FLAGS (IOAPIC_EDGE | IOAPIC_LOW)
#elif defined(CONFIG_SHARED_IRQ_0_RISING_EDGE)
#define SHARED_IRQ_0_FLAGS (IOAPIC_EDGE | IOAPIC_HIGH)
#elif defined(CONFIG_SHARED_IRQ_0_LEVEL_HIGH)
#define SHARED_IRQ_0_FLAGS (IOAPIC_LEVEL | IOAPIC_HIGH)
#elif defined(CONFIG_SHARED_IRQ_0_LEVEL_LOW)
#define SHARED_IRQ_0_FLAGS (IOAPIC_LEVEL | IOAPIC_LOW)
#endif
#endif /* CONFIG_SHARED_IRQ_0 */
#else
#define SHARED_IRQ_0_FLAGS 0
#endif /* CONFIG_IOAPIC */
void shared_irq_config_0_irq(void)
{
IRQ_CONNECT(CONFIG_SHARED_IRQ_0_IRQ, CONFIG_SHARED_IRQ_0_PRI,
shared_irq_isr, DEVICE_GET(shared_irq_0),
SHARED_IRQ_0_FLAGS);
}
#endif /* CONFIG_SHARED_IRQ_0 */
#if CONFIG_SHARED_IRQ_1
void shared_irq_config_1_irq(void);
struct shared_irq_config shared_irq_config_1 = {
.irq_num = CONFIG_SHARED_IRQ_1_IRQ,
.client_count = CONFIG_SHARED_IRQ_NUM_CLIENTS,
.config = shared_irq_config_1_irq
};
struct shared_irq_runtime shared_irq_1_runtime;
DEVICE_INIT(shared_irq_1, CONFIG_SHARED_IRQ_1_NAME, shared_irq_initialize,
&shared_irq_1_runtime, &shared_irq_config_1,
SECONDARY, CONFIG_SHARED_IRQ_INIT_PRIORITY);
#if defined(CONFIG_IOAPIC)
#if defined(CONFIG_SHARED_IRQ_1)
#if defined(CONFIG_SHARED_IRQ_1_FALLING_EDGE)
#define SHARED_IRQ_1_FLAGS (IOAPIC_EDGE | IOAPIC_LOW)
#elif defined(CONFIG_SHARED_IRQ_1_RISING_EDGE)
#define SHARED_IRQ_1_FLAGS (IOAPIC_EDGE | IOAPIC_HIGH)
#elif defined(CONFIG_SHARED_IRQ_1_LEVEL_HIGH)
#define SHARED_IRQ_1_FLAGS (IOAPIC_LEVEL | IOAPIC_HIGH)
#elif defined(CONFIG_SHARED_IRQ_1_LEVEL_LOW)
#define SHARED_IRQ_1_FLAGS (IOAPIC_LEVEL | IOAPIC_LOW)
#endif
#endif /* CONFIG_SHARED_IRQ_1 */
#else
#define SHARED_IRQ_1_FLAGS 0
#endif /* CONFIG_IOAPIC */
void shared_irq_config_1_irq(void)
{
IRQ_CONNECT(CONFIG_SHARED_IRQ_1_IRQ, CONFIG_SHARED_IRQ_1_PRI,
shared_irq_isr, DEVICE_GET(shared_irq_1),
SHARED_IRQ_1_FLAGS);
}
#endif /* CONFIG_SHARED_IRQ_1 */