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/*
* hal_io_fmc.c
* ------------
* This module contains common code to talk to the FPGA over the FMC bus.
*
* Author: Paul Selkirk
* Copyright (c) 2014-2016, 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 <stdio.h>
#include <stdint.h>
#include "stm-fmc.h"
/* stm32f4xx_hal_def.h and hal.h both define HAL_OK as an enum value */
#define HAL_OK HAL_OKAY
#include "hal.h"
#include "hal_internal.h"
static int debug = 0;
static int inited = 0;
#ifndef FMC_IO_TIMEOUT
#define FMC_IO_TIMEOUT 100000000
#endif
static hal_error_t init(void)
{
if (!inited) {
fmc_init();
inited = 1;
}
return HAL_OK;
}
/* Translate cryptech register number to FMC address.
*/
static hal_addr_t fmc_offset(hal_addr_t offset)
{
return offset << 2;
}
void hal_io_set_debug(int onoff)
{
debug = onoff;
}
static void dump(char *label, hal_addr_t offset, const uint8_t *buf, size_t len)
{
if (debug) {
size_t i;
printf("%s %04x [", label, (unsigned int)offset);
for (i = 0; i < len; ++i)
printf(" %02x", buf[i]);
printf(" ]\n");
}
}
hal_error_t hal_io_write(const hal_core_t *core, hal_addr_t offset, const uint8_t *buf, size_t len)
{
hal_error_t err;
if (core == NULL)
return HAL_ERROR_CORE_NOT_FOUND;
if (len % 4 != 0)
return HAL_ERROR_IO_BAD_COUNT;
if ((err = init()) != HAL_OK)
return err;
dump("write ", offset + hal_core_base(core), buf, len);
offset = fmc_offset(offset + hal_core_base(core));
for (; len > 0; offset += 4, buf += 4, len -= 4) {
uint32_t val;
val = htonl(*(uint32_t *)buf);
fmc_write_32(offset, &val);
}
return HAL_OK;
}
hal_error_t hal_io_read(const hal_core_t *core, hal_addr_t offset, uint8_t *buf, size_t len)
{
uint8_t *rbuf = buf;
int rlen = len;
hal_addr_t orig_offset = offset;
hal_error_t err;
if (core == NULL)
return HAL_ERROR_CORE_NOT_FOUND;
if (len % 4 != 0)
return HAL_ERROR_IO_BAD_COUNT;
if ((err = init()) != HAL_OK)
return err;
offset = fmc_offset(offset + hal_core_base(core));
for (; rlen > 0; offset += 4, rbuf += 4, rlen -= 4) {
uint32_t val;
fmc_read_32(offset, &val);
*(uint32_t *)rbuf = ntohl(val);
}
dump("read ", orig_offset + hal_core_base(core), buf, len);
return HAL_OK;
}
hal_error_t hal_io_init(const hal_core_t *core)
{
uint8_t buf[4] = { 0, 0, 0, CTRL_INIT };
return hal_io_write(core, ADDR_CTRL, buf, sizeof(buf));
}
hal_error_t hal_io_next(const hal_core_t *core)
{
uint8_t buf[4] = { 0, 0, 0, CTRL_NEXT };
return hal_io_write(core, ADDR_CTRL, buf, sizeof(buf));
}
hal_error_t hal_io_wait(const hal_core_t *core, uint8_t status, int *count)
{
hal_error_t err;
uint8_t buf[4];
int i;
for (i = 1; ; ++i) {
if (count && (*count > 0) && (i >= *count))
return HAL_ERROR_IO_TIMEOUT;
if ((err = hal_io_read(core, ADDR_STATUS, buf, sizeof(buf))) != HAL_OK)
return err;
if ((buf[3] & status) != 0) {
if (count)
*count = i;
return HAL_OK;
}
}
}
hal_error_t hal_io_wait_ready(const hal_core_t *core)
{
int limit = FMC_IO_TIMEOUT;
return hal_io_wait(core, STATUS_READY, &limit);
}
hal_error_t hal_io_wait_valid(const hal_core_t *core)
{
int limit = FMC_IO_TIMEOUT;
return hal_io_wait(core, STATUS_VALID, &limit);
}
/*
* Local variables:
* indent-tabs-mode: nil
* c-basic-offset: 2
* End:
*/
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