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/*
* stm-fpgacfg.c
* ----------
* Functions for accessing the FPGA config memory and controlling
* the low-level status of the FPGA (reset registers/reboot etc.).
*
* 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-fpgacfg.h"
#include "stm-init.h"
SPI_HandleTypeDef hspi_fpgacfg;
struct spiflash_ctx fpgacfg_ctx = {&hspi_fpgacfg, PROM_CS_N_GPIO_Port, PROM_CS_N_Pin};
int fpgacfg_check_id()
{
return n25q128_check_id(&fpgacfg_ctx);
}
int fpgacfg_write_data(uint32_t offset, const uint8_t *buf, const uint32_t len)
{
if ((offset % N25Q128_SECTOR_SIZE) == 0)
// first page in sector, need to erase sector
if (! n25q128_erase_sector(&fpgacfg_ctx, offset / N25Q128_SECTOR_SIZE))
return -4;
return n25q128_write_data(&fpgacfg_ctx, offset, buf, len);
}
void fpgacfg_access_control(enum fpgacfg_access_ctrl access)
{
if (access == ALLOW_ARM) {
// fpga disable = 1
HAL_GPIO_WritePin(PROM_FPGA_DIS_GPIO_Port, PROM_FPGA_DIS_Pin, GPIO_PIN_SET);
// arm enable = 0
HAL_GPIO_WritePin(GPIOF, PROM_ARM_ENA_Pin, GPIO_PIN_RESET);
} else if (access == ALLOW_FPGA) {
// fpga disable = 0
HAL_GPIO_WritePin(PROM_FPGA_DIS_GPIO_Port, PROM_FPGA_DIS_Pin, GPIO_PIN_RESET);
// arm enable = 1
HAL_GPIO_WritePin(GPIOF, PROM_ARM_ENA_Pin, GPIO_PIN_SET);
} else {
// fpga disable = 1
HAL_GPIO_WritePin(PROM_FPGA_DIS_GPIO_Port, PROM_FPGA_DIS_Pin, GPIO_PIN_SET);
// arm enable = 1
HAL_GPIO_WritePin(GPIOF, PROM_ARM_ENA_Pin, GPIO_PIN_SET);
}
}
void fpgacfg_reset_fpga(enum fpgacfg_reset reset)
{
if (reset == RESET_FULL) {
/* The delay should be at least 250 uS. With HAL_Delay(1) the pulse is very close
* to that, and With HAL_Delay(3) the pulse is close to 2 ms. */
HAL_GPIO_WritePin(FPGA_PROGRAM_Port, FPGA_PROGRAM_Pin, GPIO_PIN_RESET);
HAL_Delay(3);
HAL_GPIO_WritePin(FPGA_PROGRAM_Port, FPGA_PROGRAM_Pin, GPIO_PIN_SET);
} else if (reset == RESET_REGISTERS) {
HAL_GPIO_WritePin(FPGA_INIT_Port, FPGA_INIT_Pin, GPIO_PIN_SET);
HAL_Delay(3);
HAL_GPIO_WritePin(FPGA_INIT_Port, FPGA_INIT_Pin, GPIO_PIN_RESET);
}
}
int fpgacfg_check_done(void)
{
GPIO_PinState status = HAL_GPIO_ReadPin(FPGA_DONE_Port, FPGA_DONE_Pin);
return (status == GPIO_PIN_SET);
}
int fpgacfg_erase_sectors(int num)
{
if (num > N25Q128_NUM_SECTORS || num < 0) num = N25Q128_NUM_SECTORS;
while (num) {
if (! n25q128_erase_sector(&fpgacfg_ctx, num - 1)) {
return -1;
}
num--;
}
return 1;
}
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