diff options
Diffstat (limited to 'src/flash/ocl/at91sam7x/main.c')
| -rw-r--r-- | src/flash/ocl/at91sam7x/main.c | 107 |
1 files changed, 107 insertions, 0 deletions
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 */
+}
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