135 lines
2.5 KiB
C
135 lines
2.5 KiB
C
/*
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* Copyright (c) 2016 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 <nanokernel.h>
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#include <board.h>
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#include <device.h>
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#include <errno.h>
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#include <init.h>
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#include <pinmux.h>
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#include <soc.h>
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#include <misc/util.h>
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static volatile struct __pio *_get_port(uint32_t pin)
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{
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uint32_t port_num = pin / 32;
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switch (port_num) {
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case 0:
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return __PIOA;
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case 1:
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return __PIOB;
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case 2:
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return __PIOC;
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case 3:
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return __PIOD;
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default:
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/* return null if pin is outside range */
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return NULL;
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}
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}
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static int pinmux_set(struct device *dev, uint32_t pin, uint32_t func)
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{
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volatile struct __pio *port = _get_port(pin);
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uint32_t tmp;
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ARG_UNUSED(dev);
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if (!port) {
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return -EINVAL;
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}
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tmp = port->absr;
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if (func) {
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tmp |= (1 << (pin % 32));
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} else {
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tmp &= ~(1 << (pin % 32));
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}
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port->absr = tmp;
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return 0;
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}
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static int pinmux_get(struct device *dev, uint32_t pin, uint32_t *func)
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{
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volatile struct __pio *port = _get_port(pin);
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ARG_UNUSED(dev);
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if (!port) {
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return -EINVAL;
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}
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*func = (port->absr & (1 << (pin % 32))) ? 1 : 0;
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return 0;
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}
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static int pinmux_pullup(struct device *dev, uint32_t pin, uint8_t func)
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{
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volatile struct __pio *port = _get_port(pin);
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ARG_UNUSED(dev);
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if (!port) {
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return -EINVAL;
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}
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if (func) {
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port->puer = (1 << (pin % 32));
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} else {
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port->pudr = (1 << (pin % 32));
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}
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return 0;
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}
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static int pinmux_input(struct device *dev, uint32_t pin, uint8_t func)
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{
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volatile struct __pio *port = _get_port(pin);
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ARG_UNUSED(dev);
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if (!port) {
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return -EINVAL;
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}
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if (func) {
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port->odr = (1 << (pin % 32));
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} else {
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port->oer = (1 << (pin % 32));
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}
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return 0;
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}
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static struct pinmux_driver_api api_funcs = {
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.set = pinmux_set,
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.get = pinmux_get,
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.pullup = pinmux_pullup,
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.input = pinmux_input
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};
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static int pinmux_dev_init(struct device *port)
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{
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return 0;
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}
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DEVICE_AND_API_INIT(pmux_dev, CONFIG_PINMUX_DEV_NAME,
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&pinmux_dev_init, NULL, NULL,
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PRIMARY, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,
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&api_funcs);
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