From 831d41e75064130f596896974869ce5595406dec Mon Sep 17 00:00:00 2001
From: oharboe <oharboe@b42882b7-edfa-0310-969c-e2dbd0fdcd60>
Date: Wed, 23 Apr 2008 16:36:02 +0000
Subject: Pavel Chromy's on chip flash loader

git-svn-id: svn://svn.berlios.de/openocd/trunk@612 b42882b7-edfa-0310-969c-e2dbd0fdcd60
---
 src/flash/ocl/at91sam7x/main.c | 107 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 src/flash/ocl/at91sam7x/main.c

(limited to 'src/flash/ocl/at91sam7x/main.c')

diff --git a/src/flash/ocl/at91sam7x/main.c b/src/flash/ocl/at91sam7x/main.c
new file mode 100644
index 00000000..c9e93ddb
--- /dev/null
+++ b/src/flash/ocl/at91sam7x/main.c
@@ -0,0 +1,107 @@
+/***************************************************************************
+ *   Copyright (C) 2007 by Pavel Chromy                                    *
+ *   chromy@asix.cz                                                        *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+#include "platform.h"
+
+#include "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 supress compiler warning */
+}
-- 
cgit v1.2.3