108 lines
3.3 KiB
C
108 lines
3.3 KiB
C
/***************************************************************************
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* Copyright (C) 2007 by Pavel Chromy *
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* chromy@asix.cz *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
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***************************************************************************/
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#include "platform.h"
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#include <flash/nor/ocl.h>
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#include "dcc.h"
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#include "samflash.h"
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#define BUFSIZE 1024 /* words, i.e. 4 KiB */
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uint32 buffer[1024];
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void cmd_flash(uint32 cmd)
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{
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unsigned int len;
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uint32 adr;
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uint32 chksum;
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unsigned int bi; /* buffer index */
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unsigned int bi_start; /* receive start mark */
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unsigned int bi_end; /* receive end mark */
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unsigned int ofs;
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int pagenum;
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int result;
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adr = dcc_rd();
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len = cmd&0xffff;
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ofs = adr%flash_page_size;
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bi_start = ofs/4;
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bi_end = (ofs + len + 3)/4;
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if (bi_end > BUFSIZE) {
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dcc_wr(OCL_BUFF_OVER);
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return;
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}
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chksum = OCL_CHKS_INIT;
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for (bi = 0; bi < bi_end; bi++) chksum^=buffer[bi]=dcc_rd();
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if (dcc_rd() != chksum) {
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dcc_wr(OCL_CHKS_FAIL);
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return;
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}
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/* fill in unused positions with unprogrammed values */
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for (bi = 0; bi < bi_start; bi++) buffer[bi]=0xffffffff;
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for (bi = bi_end; bi%flash_page_size; bi++) buffer[bi]=0xffffffff;
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result = 0;
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pagenum = adr/flash_page_size;
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for (bi = 0; bi < bi_end; bi += flash_page_size/4) {
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result = flash_page_program(buffer + bi, pagenum++);
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if (result) break;
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}
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/* verify written data */
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if (!result) result = flash_verify(adr, len, ((uint8 *)buffer) + ofs);
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dcc_wr(OCL_CMD_DONE | result);
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}
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int main (void)
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{
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uint32 cmd;
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for (;;) {
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cmd = dcc_rd();
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switch (cmd&OCL_CMD_MASK) {
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case OCL_PROBE:
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dcc_wr(OCL_CMD_DONE | flash_init());
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dcc_wr(0x100000); /* base */
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dcc_wr(flash_page_count*flash_page_size); /* size */
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dcc_wr(1); /* num_sectors */
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dcc_wr(4096 | ((unsigned long) flash_page_size << 16)); /* buflen and bufalign */
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break;
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case OCL_ERASE_ALL:
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dcc_wr(OCL_CMD_DONE | flash_erase_all());
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break;
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case OCL_FLASH_BLOCK:
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cmd_flash(cmd);
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break;
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default:
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/* unknown command */
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dcc_wr(OCL_CMD_ERR);
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break;
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}
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}
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return(0); /* we shall never get here, just to supress compiler warning */
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}
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