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/*
* stm-keystore.c
* ----------
* Functions for accessing the keystore memory.
*
* Copyright (c) 2016, NORDUnet A/S All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - 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.
*
* - Neither the name of the NORDUnet 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.
*/
#include "stm32f4xx_hal.h"
#include "stm-keystore.h"
#include "stm-init.h"
SPI_HandleTypeDef hspi_keystore;
struct spiflash_ctx keystore_ctx = {&hspi_keystore, KSM_PROM_CS_N_GPIO_Port, KSM_PROM_CS_N_Pin};
int keystore_check_id()
{
return n25q128_check_id(&keystore_ctx);
}
int keystore_read_data(uint32_t offset, uint8_t *buf, const uint32_t len)
{
return n25q128_read_data(&keystore_ctx, offset, buf, len);
}
int keystore_write_data(uint32_t offset, const uint8_t *buf, const uint32_t len)
{
return n25q128_write_data(&keystore_ctx, offset, buf, len, 0);
}
static int keystore_erase_something(uint32_t start, uint32_t stop, uint32_t limit,
int (*eraser)(struct spiflash_ctx *, uint32_t))
{
uint32_t something;
if (start > limit) return -2;
if (stop > limit || stop < start) return -3;
for (something = start; something <= stop; something++) {
int timeout = 200; /* times 10ms = 2 seconds timeout */
while (timeout--) {
int i = n25q128_get_wip_flag(&keystore_ctx);
if (i < 0) return 0;
if (! i) break;
HAL_Delay(10);
}
if (! timeout) return 0;
if (! eraser(&keystore_ctx, something)) {
return -1;
}
}
return 1;
}
int keystore_erase_sectors(uint32_t start, uint32_t stop)
{
return keystore_erase_something(start, stop, N25Q128_NUM_SECTORS,
n25q128_erase_sector);
}
int keystore_erase_subsectors(uint32_t start, uint32_t stop)
{
return keystore_erase_something(start, stop, N25Q128_NUM_SUBSECTORS,
n25q128_erase_subsector);
}
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