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// SPDX-License-Identifier: GPL-2.0-or-later
/***************************************************************************
* Copyright (C) 2007 by Pavel Chromy *
* chromy@asix.cz *
***************************************************************************/
#include "platform.h"
#include <flash/nor/ocl.h>
#include "dcc.h"
#include "samflash.h"
#define BUFSIZE 1024 /* words, i.e. 4 KiB */
uint32 buffer[1024];
void cmd_flash(uint32 cmd)
{
unsigned int len;
uint32 adr;
uint32 chksum;
unsigned int bi; /* buffer index */
unsigned int bi_start; /* receive start mark */
unsigned int bi_end; /* receive end mark */
unsigned int ofs;
int pagenum;
int result;
adr = dcc_rd();
len = cmd&0xffff;
ofs = adr%flash_page_size;
bi_start = ofs/4;
bi_end = (ofs + len + 3)/4;
if (bi_end > BUFSIZE) {
dcc_wr(OCL_BUFF_OVER);
return;
}
chksum = OCL_CHKS_INIT;
for (bi = 0; bi < bi_end; bi++) chksum^=buffer[bi]=dcc_rd();
if (dcc_rd() != chksum) {
dcc_wr(OCL_CHKS_FAIL);
return;
}
/* fill in unused positions with unprogrammed values */
for (bi = 0; bi < bi_start; bi++) buffer[bi]=0xffffffff;
for (bi = bi_end; bi%flash_page_size; bi++) buffer[bi]=0xffffffff;
result = 0;
pagenum = adr/flash_page_size;
for (bi = 0; bi < bi_end; bi += flash_page_size/4) {
result = flash_page_program(buffer + bi, pagenum++);
if (result) break;
}
/* verify written data */
if (!result) result = flash_verify(adr, len, ((uint8 *)buffer) + ofs);
dcc_wr(OCL_CMD_DONE | result);
}
int main (void)
{
uint32 cmd;
for (;;) {
cmd = dcc_rd();
switch (cmd&OCL_CMD_MASK) {
case OCL_PROBE:
dcc_wr(OCL_CMD_DONE | flash_init());
dcc_wr(0x100000); /* base */
dcc_wr(flash_page_count*flash_page_size); /* size */
dcc_wr(1); /* num_sectors */
dcc_wr(4096 | ((unsigned long) flash_page_size << 16)); /* buflen and bufalign */
break;
case OCL_ERASE_ALL:
dcc_wr(OCL_CMD_DONE | flash_erase_all());
break;
case OCL_FLASH_BLOCK:
cmd_flash(cmd);
break;
default:
/* unknown command */
dcc_wr(OCL_CMD_ERR);
break;
}
}
return 0; /* we shall never get here, just to suppress compiler warning */
}
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