mirror of https://github.com/ARMmbed/mbed-os.git
146 lines
4.1 KiB
C
146 lines
4.1 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2017-2020 Arm Limited
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* SPDX-License-Identifier: Apache-2.0
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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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/*
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* This file implements APIS defined in hal/pinmap.h
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*
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* Pin functions are not available in interrupt context, because the
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* NS side is only allowed to call TF-M secure functions (veneers) from
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* the NS Thread mode.
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*
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*/
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#include "mbed_assert.h"
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#include "mbed_error.h"
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#include "objects.h"
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#include "pinmap.h"
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#include "musca_b1_scc_drv.h"
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#include "tfm_ioctl_api.h"
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#include "rtx_lib.h"
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const PinMap PinMap_I2C_SDA[] = {
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{I2C0_SDA, I2C_0, ALTERNATE_FUNC_1},
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{I2C1_SDA, I2C_1, PRIMARY_FUNC},
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{NC, NC, 0}
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};
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const PinMap PinMap_I2C_SCL[] = {
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{I2C0_SCL, I2C_0, ALTERNATE_FUNC_1},
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{I2C1_SCL, I2C_1, PRIMARY_FUNC},
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{NC, NC, 0}
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};
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/**
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* \brief Translates between different pin mode enums
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*
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* \param[in] mode Pin mode to translate \ref PinMode
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*
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* \return Translated pin mode \ref pinmode_select_t
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*/
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static enum pinmode_select_t translate_pinmode(PinMode mode)
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{
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switch (mode) {
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case PullNone:
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return PINMODE_NONE;
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case PullDown:
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return PINMODE_PULL_DOWN;
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case PullUp:
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return PINMODE_PULL_UP;
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default:
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return PINMODE_NONE;
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}
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}
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/**
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* \brief Configures the GPIO pin and sets the alternate function
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*
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* \param[in] pin GPIO pin number \ref PinName
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* \param[in] function Alternate function to set \ref PinFunction
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*/
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void pin_function(PinName pin, int function)
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{
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enum gpio_altfunc_t flags;
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uint32_t result = 0;
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enum tfm_platform_err_t ret = TFM_PLATFORM_ERR_SUCCESS;
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MBED_ASSERT(pin != NC);
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/* Secure service can't be called in interrupt context. */
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if (IsException()) {
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MBED_WARNING(MBED_MAKE_ERROR(MBED_MODULE_HAL,
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MBED_ERROR_INVALID_OPERATION),
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"Pin secure service can't be called in interrupt context\n");
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return;
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}
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switch (function) {
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case PRIMARY_FUNC:
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flags = GPIO_MAIN_FUNC;
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break;
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case ALTERNATE_FUNC_1:
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flags = GPIO_ALTFUNC_1;
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break;
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case ALTERNATE_FUNC_2:
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flags = GPIO_ALTFUNC_2;
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break;
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case ALTERNATE_FUNC_3:
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flags = GPIO_ALTFUNC_3;
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break;
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default:
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return;
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}
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ret = tfm_platform_set_pin_alt_func(flags, (1u<<pin), &result);
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if (result != SCC_ERR_NONE) {
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error("Can not set pin alt func %d", pin);
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}
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if (ret != TFM_PLATFORM_ERR_SUCCESS) {
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error("tfm_platform_set_pin_alt_func failed for pin %d", pin);
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}
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}
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/**
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* \brief Sets pin mode for the given GPIO pin
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*
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* \param[in] pin GPIO pin number \ref PinName
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* \param[in] mode Pin mode to set \ref PinMode
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*/
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void pin_mode(PinName pin, PinMode mode)
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{
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enum tfm_platform_err_t ret = TFM_PLATFORM_ERR_SUCCESS;
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uint32_t result = 0;
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MBED_ASSERT(pin != NC);
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/* Secure service can't be called in interrupt context. */
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if (IsException()) {
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MBED_WARNING(MBED_MAKE_ERROR(MBED_MODULE_HAL,
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MBED_ERROR_INVALID_OPERATION),
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"Pin secure service can't be called in interrupt context\n");
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return;
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}
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ret = tfm_platform_set_pin_mode((1u<<pin), translate_pinmode(mode),
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&result);
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if (result != SCC_ERR_NONE) {
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error("Can not set pin mode %d", pin);
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}
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if (ret != TFM_PLATFORM_ERR_SUCCESS) {
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error("tfm_platform_set_pin_mode failed for pin %d", pin);
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}
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}
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