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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef _EXTI_H_
     18 #define _EXTI_H_
     19 
     20 #include <isr.h>
     21 #include <stdbool.h>
     22 #include <plat/cmsis.h>
     23 #include <plat/gpio.h>
     24 #include <gpio.h>
     25 
     26 #ifdef __cplusplus
     27 extern "C" {
     28 #endif
     29 
     30 enum ExtiTrigger
     31 {
     32     EXTI_TRIGGER_RISING = 0,
     33     EXTI_TRIGGER_FALLING,
     34     EXTI_TRIGGER_BOTH,
     35 };
     36 
     37 enum ExtiLine
     38 {
     39     EXTI_LINE_P0 = 0,
     40     EXTI_LINE_P1,
     41     EXTI_LINE_P2,
     42     EXTI_LINE_P3,
     43     EXTI_LINE_P4,
     44     EXTI_LINE_P5,
     45     EXTI_LINE_P6,
     46     EXTI_LINE_P7,
     47     EXTI_LINE_P8,
     48     EXTI_LINE_P9,
     49     EXTI_LINE_P10,
     50     EXTI_LINE_P11,
     51     EXTI_LINE_P12,
     52     EXTI_LINE_P13,
     53     EXTI_LINE_P14,
     54     EXTI_LINE_P15,
     55     EXTI_LINE_PVD = 16,
     56     EXTI_LINE_RTC_ALARM = 17,
     57     EXTI_LINE_USB_OTG_FS_WKUP = 18,
     58     EXTI_LINE_RTC_TAMPER_TS = 21,
     59     EXTI_LINE_RTC_WKUP = 22,
     60 };
     61 
     62 void extiEnableIntLine(const enum ExtiLine line, enum ExtiTrigger trigger);
     63 void extiDisableIntLine(const enum ExtiLine line);
     64 bool extiIsPendingLine(const enum ExtiLine line);
     65 void extiClearPendingLine(const enum ExtiLine line);
     66 
     67 int extiChainIsr(IRQn_Type n, struct ChainedIsr *isr);
     68 int extiUnchainIsr(IRQn_Type n, struct ChainedIsr *isr);
     69 int extiUnchainAll(uint32_t tid);
     70 
     71 int extiSetMaxLatency(struct ChainedIsr *isr, uint32_t maxLatencyNs);
     72 
     73 static inline void extiEnableIntGpio(const struct Gpio *__restrict gpioHandle, enum ExtiTrigger trigger)
     74 {
     75     if (gpioHandle) {
     76         uint32_t gpioNum = (uint32_t)gpioHandle - GPIO_HANDLE_OFFSET;
     77         extiEnableIntLine(gpioNum & GPIO_PIN_MASK, trigger);
     78     }
     79 }
     80 static inline void extiDisableIntGpio(const struct Gpio *__restrict gpioHandle)
     81 {
     82     if (gpioHandle) {
     83         uint32_t gpioNum = (uint32_t)gpioHandle - GPIO_HANDLE_OFFSET;
     84         extiDisableIntLine(gpioNum & GPIO_PIN_MASK);
     85     }
     86 }
     87 static inline bool extiIsPendingGpio(const struct Gpio *__restrict gpioHandle)
     88 {
     89     if (gpioHandle) {
     90         uint32_t gpioNum = (uint32_t)gpioHandle - GPIO_HANDLE_OFFSET;
     91         return extiIsPendingLine(gpioNum & GPIO_PIN_MASK);
     92     }
     93     return false;
     94 }
     95 static inline void extiClearPendingGpio(const struct Gpio *__restrict gpioHandle)
     96 {
     97     if (gpioHandle) {
     98         uint32_t gpioNum = (uint32_t)gpioHandle - GPIO_HANDLE_OFFSET;
     99         extiClearPendingLine(gpioNum & GPIO_PIN_MASK);
    100     }
    101 }
    102 
    103 #ifdef __cplusplus
    104 }
    105 #endif
    106 
    107 #endif
    108