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authorStefan Reinauer <stepan@openbios.org>2005-11-24 10:45:34 +0000
committerStefan Reinauer <stepan@openbios.org>2005-11-24 10:45:34 +0000
commit7d5c7a7f1794cf846f2b62813c81f0f2a0ac5b54 (patch)
tree3ea89e5f20c249f3c0c8f31408577d3141214d3a /util/flashrom/82802ab.c
parente0e137844adc8366de58514b10ed962da46ce77b (diff)
downloadcoreboot-7d5c7a7f1794cf846f2b62813c81f0f2a0ac5b54.tar.xz
rename the directory to match the program name
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2102 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'util/flashrom/82802ab.c')
-rw-r--r--util/flashrom/82802ab.c201
1 files changed, 201 insertions, 0 deletions
diff --git a/util/flashrom/82802ab.c b/util/flashrom/82802ab.c
new file mode 100644
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+/*
+ * 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);
+}