1 files changed, 201 insertions, 0 deletions
diff --git a/util/flashrom/82802ab.c b/util/flashrom/82802ab.c
new file mode 100644
index 0000000000..80945ad832
--- /dev/null
+++ b/util/flashrom/82802ab.c
@@ -0,0 +1,201 @@
+/*
+ * 82802ab.c: driver for programming JEDEC standard flash parts
+ *
+ *
+ * Copyright 2000 Silicon Integrated System Corporation
+ *
+ *	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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ * Reference: http://www.intel.com/design/chipsets/datashts/290658.htm
+ *
+ * $Id$
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <sys/io.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "flash.h"
+#include "82802ab.h"
+
+// I need that Berkeley bit-map printer
+void print_82802ab_status(unsigned char status)
+{
+	printf("%s", status & 0x80 ? "Ready:" : "Busy:");
+	printf("%s", status & 0x40 ? "BE SUSPEND:" : "BE RUN/FINISH:");
+	printf("%s", status & 0x20 ? "BE ERROR:" : "BE OK:");
+	printf("%s", status & 0x10 ? "PROG ERR:" : "PROG OK:");
+	printf("%s", status & 0x8 ? "VP ERR:" : "VPP OK:");
+	printf("%s", status & 0x4 ? "PROG SUSPEND:" : "PROG RUN/FINISH:");
+	printf("%s", status & 0x2 ? "WP|TBL#|WP#,ABORT:" : "UNLOCK:");
+}
+
+int probe_82802ab(struct flashchip *flash)
+{
+	volatile unsigned char *bios = flash->virt_addr;
+	unsigned char id1, id2;
+
+#if 0
+	*(volatile unsigned char *) (bios + 0x5555) = 0xAA;
+	*(volatile unsigned char *) (bios + 0x2AAA) = 0x55;
+	*(volatile unsigned char *) (bios + 0x5555) = 0x90;
+#endif
+
+	*bios = 0xff;
+	myusec_delay(10);
+	*bios = 0x90;
+	myusec_delay(10);
+
+	id1 = *(volatile unsigned char *) bios;
+	id2 = *(volatile unsigned char *) (bios + 0x01);
+
+#if 1
+	*(volatile unsigned char *) (bios + 0x5555) = 0xAA;
+	*(volatile unsigned char *) (bios + 0x2AAA) = 0x55;
+	*(volatile unsigned char *) (bios + 0x5555) = 0xF0;
+
+#endif
+	myusec_delay(10);
+
+	printf("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
+
+	if (id1 == flash->manufacture_id && id2 == flash->model_id) {
+		size_t size = flash->total_size * 1024;
+		// we need to mmap the write-protect space. 
+		bios = mmap(0, size, PROT_WRITE | PROT_READ, MAP_SHARED,
+			    flash->fd_mem, (off_t) (0 - 0x400000 - size));
+		if (bios == MAP_FAILED) {
+			// it's this part but we can't map it ...
+			perror("Error MMAP /dev/mem");
+			exit(1);
+		}
+
+		flash->virt_addr_2 = bios;
+		return 1;
+	}
+
+	return 0;
+}
+
+unsigned char wait_82802ab(volatile unsigned char *bios)
+{
+
+	unsigned char status;
+	unsigned char id1, id2;
+
+	*bios = 0x70;
+	if ((*bios & 0x80) == 0) {	// it's busy
+		while ((*bios & 0x80) == 0);
+	}
+
+	status = *bios;
+
+	// put another command to get out of status register mode
+
+	*bios = 0x90;
+	myusec_delay(10);
+
+	id1 = *(volatile unsigned char *) bios;
+	id2 = *(volatile unsigned char *) (bios + 0x01);
+
+	// this is needed to jam it out of "read id" mode
+	*(volatile unsigned char *) (bios + 0x5555) = 0xAA;
+	*(volatile unsigned char *) (bios + 0x2AAA) = 0x55;
+	*(volatile unsigned char *) (bios + 0x5555) = 0xF0;
+	return status;
+
+}
+int erase_82802ab_block(struct flashchip *flash, int offset)
+{
+	volatile unsigned char *bios = flash->virt_addr + offset;
+	volatile unsigned char *wrprotect =
+	    flash->virt_addr_2 + offset + 2;
+	unsigned char status;
+
+	// clear status register
+	*bios = 0x50;
+	//printf("Erase at %p\n", bios);
+	// clear write protect
+	//printf("write protect is at %p\n", (wrprotect));
+	//printf("write protect is 0x%x\n", *(wrprotect));
+	*(wrprotect) = 0;
+	//printf("write protect is 0x%x\n", *(wrprotect));
+
+	// now start it
+	*(volatile unsigned char *) (bios) = 0x20;
+	*(volatile unsigned char *) (bios) = 0xd0;
+	myusec_delay(10);
+	// now let's see what the register is
+	status = wait_82802ab(flash->virt_addr);
+	//print_82802ab_status(status);
+	printf("DONE BLOCK 0x%x\n", offset);
+	return (0);
+}
+int erase_82802ab(struct flashchip *flash)
+{
+	int i;
+	unsigned int total_size = flash->total_size * 1024;
+
+	printf("total_size is %d; flash->page_size is %d\n",
+	       total_size, flash->page_size);
+	for (i = 0; i < total_size; i += flash->page_size)
+		erase_82802ab_block(flash, i);
+	printf("DONE ERASE\n");
+	return (0);
+}
+
+void write_page_82802ab(volatile char *bios, char *src, volatile char *dst,
+			int page_size)
+{
+	int i;
+
+	for (i = 0; i < page_size; i++) {
+		/* transfer data from source to destination */
+		*dst = 0x40;
+		*dst++ = *src++;
+		wait_82802ab(bios);
+	}
+
+}
+
+int write_82802ab(struct flashchip *flash, unsigned char *buf)
+{
+	int i;
+	int total_size = flash->total_size * 1024, page_size =
+	    flash->page_size;
+	volatile unsigned char *bios = flash->virt_addr;
+
+	erase_82802ab(flash);
+	if (*bios != 0xff) {
+		printf("ERASE FAILED\n");
+		return -1;
+	}
+	printf("Programming Page: ");
+	for (i = 0; i < total_size / page_size; i++) {
+		printf("%04d at address: 0x%08x", i, i * page_size);
+		write_page_82802ab(bios, buf + i * page_size,
+				   bios + i * page_size, page_size);
+		printf
+		    ("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
+	}
+	printf("\n");
+	protect_82802ab(bios);
+	return (0);
+}