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/*! \page License
* Copyright (C) 2009, H&D Wireless AB All rights reserved.
*
* 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. The name of H&D Wireless AB may not be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY H&D WIRELESS AB ``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 EXPRESSLY AND
* SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
*/
#include <string.h>
#include "compiler.h"
#include "preprocessor.h"
#include "board.h"
#include "power_clocks_lib.h"
#include "gpio.h"
#include "spi.h"
#include "conf_at45dbx.h"
#include "at45dbx.h"
#include <board_init.h>
#include <nvram.h>
static struct nvram {
uint8_t read;
void *data;
uint32_t len;
uint16_t off;
} PRIV;
int nvram_init(void)
{
spi_options_t spiOptions = {
.reg = AT45DBX_SPI_FIRST_NPCS,
.baudrate = AT45DBX_SPI_MASTER_SPEED,
.bits = AT45DBX_SPI_BITS,
.spck_delay = 0,
.trans_delay = 0,
.stay_act = 1,
.spi_mode = 0,
.modfdis = 1
};
at45dbx_init(spiOptions, FPBA_HZ);
return 0;
}
/**
* Invoked by at45dbx driver
*
*/
void at45dbx_read_multiple_sector_callback(const void *psector)
{
struct nvram *priv = &PRIV;
const uint8_t *buf = psector;
if (!priv->read)
return;
memcpy(priv->data, buf + priv->off, priv->len);
}
/**
* Invoked by at45dbx driver
*
*/
void at45dbx_write_multiple_sector_callback(void *psector)
{
struct nvram *priv = &PRIV;
uint8_t *buf = psector;
memcpy(buf + priv->off, priv->data, priv->len);
}
/**
* Write/read any number bytes into any offset of nor flash by taking care
* of cases where the length is not aligned to the sector size or where
* the addr is not aligned to the sector offsets.
*
*/
static int nvram_rw(uint32_t addr, void *data, uint16_t len, int write)
{
struct nvram *priv = &PRIV;
priv->read = write ? 0 : 1;
while (len) {
uint32_t sector = addr / AT45DBX_SECTOR_SIZE;
priv->data = data;
priv->off = addr % AT45DBX_SECTOR_SIZE;
priv->len = AT45DBX_SECTOR_SIZE;
if (len < AT45DBX_SECTOR_SIZE)
priv->len = len;
if (priv->len > AT45DBX_SECTOR_SIZE - priv->off)
priv->len = AT45DBX_SECTOR_SIZE - priv->off;
at45dbx_read_open(sector);
at45dbx_read_multiple_sector(1);
at45dbx_read_close();
if (write) {
at45dbx_write_open(sector);
at45dbx_write_multiple_sector(1);
at45dbx_write_close();
}
data += priv->len;
len -= priv->len;
addr += priv->len;
}
return 0;
}
/**
* Write any number bytes into any offset of nor flash.
*
*/
int nvram_write(uint32_t addr, const void *data, uint32_t len)
{
return nvram_rw(addr, (void *) data, len, 1);
}
/**
* Read any number bytes into any offset of nor flash.
*
*/
int nvram_read(uint32_t addr, void *data, uint32_t len)
{
return nvram_rw(addr, data, len, 0);
}
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