Import Mbed OS hard-float snapshot

targets/TARGET_RENESAS/TARGET_RZ_A1XX/gpio_irq_api.c

@@ -0,0 +1,189 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * 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 <stddef.h>
+
+#include "gpio_irq_api.h"
+#include "iodefine.h"
+#include "PeripheralPins.h"
+#include "cmsis.h"
+#include "gpio_addrdefine.h"
+
+#define CHANNEL_NUM     8
+
+static void gpio_irq0(void);
+static void gpio_irq1(void);
+static void gpio_irq2(void);
+static void gpio_irq3(void);
+static void gpio_irq4(void);
+static void gpio_irq5(void);
+static void gpio_irq6(void);
+static void gpio_irq7(void);
+
+static gpio_irq_t *channel_obj[CHANNEL_NUM] = {NULL};
+static gpio_irq_handler irq_handler;
+static const int nIRQn_h = 32;
+extern PinName gpio_multi_guard;
+
+static const IRQHandler irq_tbl[CHANNEL_NUM] = {
+    &gpio_irq0,
+    &gpio_irq1,
+    &gpio_irq2,
+    &gpio_irq3,
+    &gpio_irq4,
+    &gpio_irq5,
+    &gpio_irq6,
+    &gpio_irq7,
+};
+
+static void handle_interrupt_in(int irq_num) {
+    uint16_t irqs;
+    uint16_t edge_req;
+    gpio_irq_t *obj;
+    gpio_irq_event irq_event;
+
+    irqs = INTCIRQRR;
+    if (irqs & (1 << irq_num)) {
+        obj = channel_obj[irq_num];
+        if (obj != NULL) {
+            edge_req = ((INTCICR1 >> (obj->ch * 2)) & 3);
+            if (edge_req == 1) {
+                irq_event = IRQ_FALL;
+            } else if (edge_req == 2) {
+                irq_event = IRQ_RISE;
+            } else {
+                uint32_t      mask    = (1 << (obj->pin & 0x0F));
+                __I  uint32_t *reg_in = (volatile uint32_t *) PPR((int)PINGROUP(obj->pin));
+
+                if ((*reg_in & mask) == 0) {
+                    irq_event = IRQ_FALL;
+                } else {
+                    irq_event = IRQ_RISE;
+                }
+	        }
+            irq_handler(obj->port, irq_event);
+        }
+        INTCIRQRR &= ~(1 << irq_num);
+    }
+}
+
+static void gpio_irq0(void) {
+    handle_interrupt_in(0);
+}
+
+static void gpio_irq1(void) {
+    handle_interrupt_in(1);
+}
+
+static void gpio_irq2(void) {
+    handle_interrupt_in(2);
+}
+
+static void gpio_irq3(void) {
+    handle_interrupt_in(3);
+}
+
+static void gpio_irq4(void) {
+    handle_interrupt_in(4);
+}
+
+static void gpio_irq5(void) {
+    handle_interrupt_in(5);
+}
+
+static void gpio_irq6(void) {
+    handle_interrupt_in(6);
+}
+
+static void gpio_irq7(void) {
+    handle_interrupt_in(7);
+}
+
+int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
+    int shift;
+    if (pin == NC) return -1;
+
+    obj->ch = pinmap_peripheral(pin, PinMap_IRQ);
+    obj->pin = (int)pin ;
+    obj->port = (int)id ;
+
+    shift = obj->ch*2;
+    channel_obj[obj->ch] = obj;
+    irq_handler = handler;
+    
+    pinmap_pinout(pin, PinMap_IRQ);
+    gpio_multi_guard = pin;           /* Set multi guard */
+
+    // INTC settings
+    InterruptHandlerRegister((IRQn_Type)(nIRQn_h+obj->ch), (void (*)(uint32_t))irq_tbl[obj->ch]);
+    INTCICR1 &= ~(0x3 << shift);
+    GIC_SetPriority((IRQn_Type)(nIRQn_h+obj->ch), 5);
+    GIC_SetConfiguration((IRQn_Type)(nIRQn_h + obj->ch), 1);
+    obj->int_enable = 1;
+    __enable_irq();
+
+    return 0;
+}
+
+void gpio_irq_free(gpio_irq_t *obj) {
+    channel_obj[obj->ch] = NULL;
+}
+
+void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
+    int shift = obj->ch*2;
+    uint16_t val = event == IRQ_RISE ? 2 : 
+                   event == IRQ_FALL ? 1 : 0;
+    uint16_t work_icr_val;
+
+    /* check edge interrupt setting */
+    work_icr_val = INTCICR1;
+    if (enable == 1) {
+        /* Set interrupt serect */
+        work_icr_val |=  (val << shift);
+    } else {
+        /* Clear interrupt serect */
+        work_icr_val &= ~(val << shift);
+    }
+
+    if ((work_icr_val & (3 << shift)) == 0) {
+        /* No edge interrupt setting */
+        GIC_DisableIRQ((IRQn_Type)(nIRQn_h+obj->ch));
+        /* Clear Interrupt flags */
+        INTCIRQRR &= ~(1 << obj->ch);
+        INTCICR1  = work_icr_val;
+    } else if (obj->int_enable == 1) {
+        INTCICR1  = work_icr_val;
+        GIC_EnableIRQ((IRQn_Type)(nIRQn_h + obj->ch));
+    } else {
+        INTCICR1  = work_icr_val;
+    }
+}
+
+void gpio_irq_enable(gpio_irq_t *obj) {
+    int shift = obj->ch*2;
+    uint16_t work_icr_val = INTCICR1;
+
+    /* check edge interrupt setting */
+    if ((work_icr_val & (3 << shift)) != 0) {
+        GIC_EnableIRQ((IRQn_Type)(nIRQn_h + obj->ch));
+    }
+    obj->int_enable = 1;
+}
+
+void gpio_irq_disable(gpio_irq_t *obj) {
+    GIC_DisableIRQ((IRQn_Type)(nIRQn_h + obj->ch));
+    obj->int_enable = 0;
+}
+