1 files changed, 107 insertions, 0 deletions
diff --git a/contrib/loaders/flash/at91sam7x/main.c b/contrib/loaders/flash/at91sam7x/main.c
new file mode 100644
index 00000000..c4b4dcf2
--- /dev/null
+++ b/contrib/loaders/flash/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.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
+ ***************************************************************************/
+#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 supress compiler warning */
+}