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 #include <plat/inc/pwr.h> 18 #include <plat/inc/syscfg.h> 19 20 #define SYSCFG_REG_SHIFT 2 21 22 struct StmSyscfg 23 { 24 volatile uint32_t MEMRMP; 25 volatile uint32_t PMC; 26 volatile uint32_t EXTICR[4]; 27 volatile uint32_t CMPCR; 28 }; 29 syscfgSetExtiPort(const struct Gpio * __restrict gpioHandle)30void syscfgSetExtiPort(const struct Gpio *__restrict gpioHandle) 31 { 32 if (gpioHandle) { 33 uint32_t gpioNum = (uint32_t)gpioHandle - GPIO_HANDLE_OFFSET; 34 struct StmSyscfg *block = (struct StmSyscfg *)SYSCFG_BASE; 35 const uint32_t bankNo = gpioNum >> GPIO_PORT_SHIFT; 36 const uint32_t pinNo = gpioNum & GPIO_PIN_MASK; 37 const uint32_t regNo = pinNo >> SYSCFG_REG_SHIFT; 38 const uint32_t nibbleNo = pinNo & ((1UL << SYSCFG_REG_SHIFT) - 1UL); 39 const uint32_t shift_4b = nibbleNo << 2UL; 40 const uint32_t mask_4b = 0x0FUL << shift_4b; 41 42 pwrUnitClock(PERIPH_BUS_APB2, PERIPH_APB2_SYSCFG, true); 43 44 block->EXTICR[regNo] = (block->EXTICR[regNo] & ~mask_4b) | (bankNo << shift_4b); 45 } 46 } 47