Aaron Fischer
f24858d162
This step seems bold, but is saves us so much hassle. Even better, we have a reliable codebase, with all the dependencies (and their versions) we need in order to build the project. If a library got an update, we can replace it inplace if the code is still compatible.
154 lines
4.4 KiB
C
154 lines
4.4 KiB
C
/*! \page License
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* Copyright (C) 2009, H&D Wireless AB All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. The name of H&D Wireless AB may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY H&D WIRELESS AB ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY AND
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* SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <string.h>
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#include "compiler.h"
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#include "preprocessor.h"
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#include "board.h"
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#include "power_clocks_lib.h"
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#include "gpio.h"
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#include "spi.h"
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#include "conf_at45dbx.h"
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#include "at45dbx.h"
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#include <board_init.h>
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#include <nvram.h>
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static struct nvram {
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uint8_t read;
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void *data;
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uint32_t len;
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uint16_t off;
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} PRIV;
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int nvram_init(void)
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{
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spi_options_t spiOptions = {
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.reg = AT45DBX_SPI_FIRST_NPCS,
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.baudrate = AT45DBX_SPI_MASTER_SPEED,
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.bits = AT45DBX_SPI_BITS,
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.spck_delay = 0,
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.trans_delay = 0,
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.stay_act = 1,
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.spi_mode = 0,
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.modfdis = 1
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};
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at45dbx_init(spiOptions, FPBA_HZ);
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return 0;
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}
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/**
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* Invoked by at45dbx driver
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*
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*/
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void at45dbx_read_multiple_sector_callback(const void *psector)
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{
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struct nvram *priv = &PRIV;
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const uint8_t *buf = psector;
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if (!priv->read)
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return;
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memcpy(priv->data, buf + priv->off, priv->len);
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}
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/**
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* Invoked by at45dbx driver
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*
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*/
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void at45dbx_write_multiple_sector_callback(void *psector)
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{
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struct nvram *priv = &PRIV;
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uint8_t *buf = psector;
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memcpy(buf + priv->off, priv->data, priv->len);
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}
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/**
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* Write/read any number bytes into any offset of nor flash by taking care
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* of cases where the length is not aligned to the sector size or where
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* the addr is not aligned to the sector offsets.
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*
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*/
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static int nvram_rw(uint32_t addr, void *data, uint16_t len, int write)
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{
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struct nvram *priv = &PRIV;
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priv->read = write ? 0 : 1;
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while (len) {
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uint32_t sector = addr / AT45DBX_SECTOR_SIZE;
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priv->data = data;
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priv->off = addr % AT45DBX_SECTOR_SIZE;
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priv->len = AT45DBX_SECTOR_SIZE;
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if (len < AT45DBX_SECTOR_SIZE)
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priv->len = len;
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if (priv->len > AT45DBX_SECTOR_SIZE - priv->off)
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priv->len = AT45DBX_SECTOR_SIZE - priv->off;
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at45dbx_read_open(sector);
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at45dbx_read_multiple_sector(1);
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at45dbx_read_close();
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if (write) {
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at45dbx_write_open(sector);
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at45dbx_write_multiple_sector(1);
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at45dbx_write_close();
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}
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data += priv->len;
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len -= priv->len;
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addr += priv->len;
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}
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return 0;
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}
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/**
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* Write any number bytes into any offset of nor flash.
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*
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*/
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int nvram_write(uint32_t addr, const void *data, uint32_t len)
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{
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return nvram_rw(addr, (void *) data, len, 1);
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}
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/**
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* Read any number bytes into any offset of nor flash.
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*
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*/
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int nvram_read(uint32_t addr, void *data, uint32_t len)
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{
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return nvram_rw(addr, data, len, 0);
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}
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