mirror of https://github.com/wolfSSL/wolfBoot.git
105 lines
2.5 KiB
C
105 lines
2.5 KiB
C
/* nrf52.c
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*
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* Copyright (C) 2018 wolfSSL Inc.
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*
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* This file is part of wolfBoot.
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*
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* wolfBoot is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* wolfBoot is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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#include <stdint.h>
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/* Assembly helpers */
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#define DMB() __asm__ volatile ("dmb")
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/* Instantiation */
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#define CLOCK_CONTROL_BASE (0x40000000)
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#define NVMC_BASE (0x4001E000)
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/* Flash write/erase control */
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#define NVMC_CONFIG *((volatile uint32_t *)(NVMC_BASE + 0x504))
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#define NVMC_ERASEPAGE *((volatile uint32_t *)(NVMC_BASE + 0x508))
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#define NVMC_READY *((volatile uint32_t *)(NVMC_BASE + 0x400))
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#define NVMC_CONFIG_REN 0
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#define NVMC_CONFIG_WEN 1
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#define NVMC_CONFIG_EEN 2
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#define FLASH_PAGE_SIZE (4096)
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/* Clock control */
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#define TASKS_HFCLKSTART *((volatile uint32_t *)(CLOCK_CONTROL_BASE + 0x000))
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#define TASKS_HFCLKSTOP *((volatile uint32_t *)(CLOCK_CONTROL_BASE + 0x004))
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#define TASKS_HFCLKSTARTED *((volatile uint32_t *)(CLOCK_CONTROL_BASE + 0x100))
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static void flash_wait_complete(void)
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{
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while (NVMC_READY == 0)
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;
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}
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int hal_flash_write(uint32_t address, const uint8_t *data, int len)
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{
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int i;
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NVMC_CONFIG = NVMC_CONFIG_WEN;
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flash_wait_complete();
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/* Set 8-bit write */
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for (i = 0; i < len; i++) {
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((uint8_t *)(address))[i] = data[i];
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flash_wait_complete();
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}
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return 0;
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}
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void hal_flash_unlock(void)
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{
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}
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void hal_flash_lock(void)
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{
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}
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int hal_flash_erase(uint32_t address, int len)
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{
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int start = -1, end = -1, i;
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uint32_t end_address = address + len;
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start = (address / FLASH_PAGE_SIZE);
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if (start == 0)
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return -1;
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end = end_address / FLASH_PAGE_SIZE;
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NVMC_CONFIG = NVMC_CONFIG_EEN;
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flash_wait_complete();
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for (i = start; i <= end; i++) {
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NVMC_ERASEPAGE = i;
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flash_wait_complete();
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}
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return 0;
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}
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void hal_init(void)
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{
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TASKS_HFCLKSTART = 1;
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while(TASKS_HFCLKSTARTED == 0)
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;
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}
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void hal_prepare_boot(void)
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{
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TASKS_HFCLKSTOP = 1;
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}
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