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