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// SPDX-License-Identifier: GPL-2.0-or-later
/***************************************************************************
* Copyright (C) 2022 by Daniel Anselmi *
* danselmi@gmx.ch *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "lattice_bit.h"
#include "raw_bit.h"
#include "pld.h"
#include <helper/system.h>
#include <helper/log.h>
#include <helper/binarybuffer.h>
enum read_bit_state {
SEEK_HEADER_START,
SEEK_HEADER_END,
SEEK_PREAMBLE,
SEEK_ID,
DONE,
};
static int lattice_read_bit_file(struct lattice_bit_file *bit_file, const char *filename, enum lattice_family_e family)
{
int retval = cpld_read_raw_bit_file(&bit_file->raw_bit, filename);
if (retval != ERROR_OK)
return retval;
bit_file->part = NULL;
bit_file->has_id = false;
enum read_bit_state state = SEEK_HEADER_START;
for (size_t pos = 1; pos < bit_file->raw_bit.length && state != DONE; ++pos) {
switch (state) {
case SEEK_HEADER_START:
if (bit_file->raw_bit.data[pos] == 0 && bit_file->raw_bit.data[pos - 1] == 0xff)
state = SEEK_HEADER_END;
break;
case SEEK_HEADER_END:
if (pos + 6 < bit_file->raw_bit.length &&
strncmp((const char *)(bit_file->raw_bit.data + pos), "Part: ", 6) == 0) {
bit_file->part = (const char *)bit_file->raw_bit.data + pos + 6;
LOG_INFO("part found: %s\n", bit_file->part);
} else if (bit_file->raw_bit.data[pos] == 0xff && bit_file->raw_bit.data[pos - 1] == 0) {
bit_file->offset = pos;
state = (family != LATTICE_ECP2 && family != LATTICE_ECP3) ? SEEK_PREAMBLE : DONE;
}
break;
case SEEK_PREAMBLE:
if (pos >= 4) {
uint32_t preamble = be_to_h_u32(bit_file->raw_bit.data + pos - 3);
switch (preamble) {
case 0xffffbdb3:
state = SEEK_ID;
break;
case 0xffffbfb3:
case 0xffffbeb3:
state = DONE;
break;
}
}
break;
case SEEK_ID:
if (pos + 7 < bit_file->raw_bit.length && bit_file->raw_bit.data[pos] == 0xe2) {
bit_file->idcode = be_to_h_u32(&bit_file->raw_bit.data[pos + 4]);
bit_file->has_id = true;
state = DONE;
}
break;
default:
break;
}
}
if (state != DONE) {
LOG_ERROR("parsing bitstream failed");
return ERROR_PLD_FILE_LOAD_FAILED;
}
for (size_t i = bit_file->offset; i < bit_file->raw_bit.length; i++)
bit_file->raw_bit.data[i] = flip_u32(bit_file->raw_bit.data[i], 8);
return ERROR_OK;
}
int lattice_read_file(struct lattice_bit_file *bit_file, const char *filename, enum lattice_family_e family)
{
if (!filename || !bit_file)
return ERROR_COMMAND_SYNTAX_ERROR;
/* check if binary .bin or ascii .bit/.hex */
const char *file_suffix_pos = strrchr(filename, '.');
if (!file_suffix_pos) {
LOG_ERROR("Unable to detect filename suffix");
return ERROR_PLD_FILE_LOAD_FAILED;
}
if (strcasecmp(file_suffix_pos, ".bit") == 0)
return lattice_read_bit_file(bit_file, filename, family);
LOG_ERROR("Filetype not supported");
return ERROR_PLD_FILE_LOAD_FAILED;
}