hal_lld.c

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/*
    ChibiOS - Copyright (C) 2014-2015 Fabio Utzig
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at
 
        http://www.apache.org/licenses/LICENSE-2.0
 
    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/
 
/**
 * @file    KE1xF/hal_lld.c
 * @brief   HAL Driver subsystem low level driver source.
 * @author  andreika <prometheus.pcb@gmail.com>
 *
 * @addtogroup HAL
 * @{
 */
 
#include <stdint.h>
#include "hal.h"
#include "clock_config.h"
 
/*===========================================================================*/
/* Driver local definitions.                                                 */
/*===========================================================================*/
 
/*===========================================================================*/
/* Driver exported variables.                                                */
/*===========================================================================*/
 
/*===========================================================================*/
/* Driver local variables and types.                                         */
/*===========================================================================*/
 
// Bootloader config peripheral enable flags
// Bootloader on LPUART & LPSPI, not on CAN
#ifndef BCA_PERIPH
#define BCA_PERIPH ((1<<0) | (1<<2))  /* LPUART | LPSPI */
#endif /* BCA_PERIPH */
 
__attribute__ ((used,section(".bcaconfig")))
const uint8_t _bca[0x40] = {
   'k',  'c',  'f',  'g', 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  BCA_PERIPH, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
};
 
__attribute__ ((used,section(".cfmconfig")))
const uint8_t _cfm[0x10] = {
  0xFF,  /* NV_BACKKEY3: KEY=0xFF */
  0xFF,  /* NV_BACKKEY2: KEY=0xFF */
  0xFF,  /* NV_BACKKEY1: KEY=0xFF */
  0xFF,  /* NV_BACKKEY0: KEY=0xFF */
  0xFF,  /* NV_BACKKEY7: KEY=0xFF */
  0xFF,  /* NV_BACKKEY6: KEY=0xFF */
  0xFF,  /* NV_BACKKEY5: KEY=0xFF */
  0xFF,  /* NV_BACKKEY4: KEY=0xFF */
  0xFF,  /* NV_FPROT3: PROT=0xFF */
  0xFF,  /* NV_FPROT2: PROT=0xFF */
  0xFF,  /* NV_FPROT1: PROT=0xFF */
  0xFF,  /* NV_FPROT0: PROT=0xFF */
  /* [andreika][rusefi]: Warning! These two bytes are extremely important! Don't change them until 100% sure! */
  /* there is an opinion that wrong values would brick your Kinetis chip for good */
  0x7E,  /* NV_FSEC: KEYEN=1,MEEN=3,FSLACC=3,SEC=2 */
  0xFB,  /* NV_FOPT: BOOTSRC_SEL=1,res=111,RESET_PIN_CFG=1,NMI_DIS=0,BOOTPIN_OPT=1,LPBOOT=1 */
 
  0xFF,
  0xFF
};
 
/*===========================================================================*/
/* Driver local functions.                                                   */
/*===========================================================================*/
 
/*===========================================================================*/
/* Driver interrupt handlers.                                                */
/*===========================================================================*/
 
/*===========================================================================*/
/* Driver exported functions.                                                */
/*===========================================================================*/
 
/**
 * @brief   Low level HAL driver initialization.
 * @todo    Use a macro to define the system clock frequency.
 *
 * @notapi
 */
void hal_lld_init(void) {
    // Enable DMA
    dmaInit();
}
 
/**
 * @brief   KE1xF initialization.
 * @note    All the involved constants come from the file @p board.h.
 * @note    This function is meant to be invoked early during the system
 *          initialization, it is usually invoked from the file
 *          @p board.c.
 * @todo    This function needs to be more generic.
 *
 * @special
 */
void ke1xf_init(void) {
#if ((__FPU_PRESENT == 1) && (__FPU_USED == 1))
    SCB->CPACR |= ((3UL << 10*2) | (3UL << 11*2));    /* set CP10, CP11 Full Access */
#endif /* ((__FPU_PRESENT == 1) && (__FPU_USED == 1)) */
 
    /* Disable Watchdog */
    WDOG->CNT = WDOG_UPDATE_KEY;
    WDOG->TOVAL = 0xFFFF;
    WDOG->CS = (uint32_t) ((WDOG->CS) & ~WDOG_CS_EN_MASK) | WDOG_CS_UPDATE_MASK;
 
    /* Initialize Cache */
    /* Enable Code Bus Cache */
    /* set command to invalidate all ways, enable write buffer and write GO bit to initiate command */
    LMEM->PCCCR |= LMEM_PCCCR_INVW1_MASK | LMEM_PCCCR_INVW0_MASK;
    LMEM->PCCCR |= LMEM_PCCCR_GO_MASK;
    /* Wait until the command completes */
    while (LMEM->PCCCR & LMEM_PCCCR_GO_MASK) {
    }
    /* Enable cache, enable write buffer */
    LMEM->PCCCR |= (LMEM_PCCCR_ENWRBUF_MASK | LMEM_PCCCR_ENCACHE_MASK);
    __ISB();
}
 
/** @} */