47 lines
1.5 KiB
C
47 lines
1.5 KiB
C
/*
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* Copyright (C) 2016 The Android Open Source Project
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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 <plat/pwr.h>
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#include <plat/syscfg.h>
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#define SYSCFG_REG_SHIFT 2
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struct StmSyscfg
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{
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volatile uint32_t MEMRMP;
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volatile uint32_t PMC;
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volatile uint32_t EXTICR[4];
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volatile uint32_t CMPCR;
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};
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void syscfgSetExtiPort(const struct Gpio *__restrict gpioHandle)
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{
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if (gpioHandle) {
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uint32_t gpioNum = (uint32_t)gpioHandle - GPIO_HANDLE_OFFSET;
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struct StmSyscfg *block = (struct StmSyscfg *)SYSCFG_BASE;
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const uint32_t bankNo = gpioNum >> GPIO_PORT_SHIFT;
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const uint32_t pinNo = gpioNum & GPIO_PIN_MASK;
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const uint32_t regNo = pinNo >> SYSCFG_REG_SHIFT;
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const uint32_t nibbleNo = pinNo & ((1UL << SYSCFG_REG_SHIFT) - 1UL);
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const uint32_t shift_4b = nibbleNo << 2UL;
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const uint32_t mask_4b = 0x0FUL << shift_4b;
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pwrUnitClock(PERIPH_BUS_APB2, PERIPH_APB2_SYSCFG, true);
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block->EXTICR[regNo] = (block->EXTICR[regNo] & ~mask_4b) | (bankNo << shift_4b);
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}
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}
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