128 lines
4 KiB
C
128 lines
4 KiB
C
/*
|
|
* Original file:
|
|
* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
|
|
* All rights reserved.
|
|
*
|
|
* Port to Contiki:
|
|
* Copyright (c) 2014 Andreas Dröscher <contiki@anticat.ch>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 3. Neither the name of the copyright holder nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
/**
|
|
* \addtogroup cc2538-pka
|
|
* @{
|
|
*
|
|
* \file
|
|
* Implementation of the cc2538 PKA engine driver
|
|
*/
|
|
#include "contiki.h"
|
|
#include "sys/energest.h"
|
|
#include "dev/pka.h"
|
|
#include "dev/sys-ctrl.h"
|
|
#include "dev/nvic.h"
|
|
#include "lpm.h"
|
|
#include "reg.h"
|
|
|
|
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
|
|
static volatile struct process *notification_process = NULL;
|
|
/*---------------------------------------------------------------------------*/
|
|
/** \brief The PKA engine ISR
|
|
*
|
|
* This is the interrupt service routine for the PKA engine.
|
|
*
|
|
* This ISR is called at worst from PM0, so lpm_exit() does not need
|
|
* to be called.
|
|
*/
|
|
void
|
|
pka_isr(void)
|
|
{
|
|
ENERGEST_ON(ENERGEST_TYPE_IRQ);
|
|
|
|
nvic_interrupt_unpend(NVIC_INT_PKA);
|
|
nvic_interrupt_disable(NVIC_INT_PKA);
|
|
|
|
if(notification_process != NULL) {
|
|
process_poll((struct process *)notification_process);
|
|
notification_process = NULL;
|
|
}
|
|
|
|
ENERGEST_OFF(ENERGEST_TYPE_IRQ);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static bool
|
|
permit_pm1(void)
|
|
{
|
|
return (REG(PKA_FUNCTION) & PKA_FUNCTION_RUN) == 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
pka_init(void)
|
|
{
|
|
volatile int i;
|
|
|
|
lpm_register_peripheral(permit_pm1);
|
|
|
|
pka_enable();
|
|
|
|
/* Reset the PKA engine */
|
|
REG(SYS_CTRL_SRSEC) |= SYS_CTRL_SRSEC_PKA;
|
|
for(i = 0; i < 16; i++) {
|
|
REG(SYS_CTRL_SRSEC) &= ~SYS_CTRL_SRSEC_PKA;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
pka_enable(void)
|
|
{
|
|
/* Enable the clock for the PKA engine */
|
|
REG(SYS_CTRL_RCGCSEC) |= SYS_CTRL_RCGCSEC_PKA;
|
|
REG(SYS_CTRL_SCGCSEC) |= SYS_CTRL_SCGCSEC_PKA;
|
|
REG(SYS_CTRL_DCGCSEC) |= SYS_CTRL_DCGCSEC_PKA;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
pka_disable(void)
|
|
{
|
|
/* Gate the clock for the PKA engine */
|
|
REG(SYS_CTRL_RCGCSEC) &= ~SYS_CTRL_RCGCSEC_PKA;
|
|
REG(SYS_CTRL_SCGCSEC) &= ~SYS_CTRL_SCGCSEC_PKA;
|
|
REG(SYS_CTRL_DCGCSEC) &= ~SYS_CTRL_DCGCSEC_PKA;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
uint8_t
|
|
pka_check_status(void)
|
|
{
|
|
return (REG(PKA_FUNCTION) & PKA_FUNCTION_RUN) == 0;
|
|
}
|
|
void
|
|
pka_register_process_notification(struct process *p)
|
|
{
|
|
notification_process = p;
|
|
}
|
|
/** @} */
|