2007/11/22, "Alan Alexander" <[EMAIL PROTECTED]>:
>
> Hi all,
>
> I've recently checked out and built revision 2977 of flashrom in order
> to apply a simple BIOS configuration change to approx 200 embedded Linux
> devices.
> Unfortunately although flashrom is able to read the contents of the BIOS
> flash, writes fail to take (verification fails).
>
> The system basics are as follows:
> IEI NanoLX Board (AMD LX800 + CS5536 + Winbond W83627EHG)
> http://www.ieiworld.com/en/product_IPC.asp?model=NANO-LX
> Linux Kernel Version 2.6.20
> Flash part identified by flashrom as Pm49FL004 at physical
> address 0xfff80000 (512 KB)
>
> I see from the source code that the CS5536 chipset is directly supported
> and that the code attempts to remove the write protection via MSR
> 0x1808. This all looks good and yet the writes fail to take. I assume
> therefore that this board is using some GPIOs to disable writes to the
> BIOS flash?
>
> Does it sound likely that GPIOs are causing the write problem that I am
> seeing? Does anyone know how I might go about figuring out which GPIOs
> to look at?
>
> Any help would be very appreciated.
>
> Best regards,
>
>
> Alan Alexander mailto:[EMAIL PROTECTED]
> Icera Inc, 2520 The Quadrant, Aztec west, Bristol BS32 4AQ, UK
> Tel. +44 (0)1454 284805
I have the same problems with flashrom on iei/pcisa-lx.
http://www.ieiworld.com/en/product_IPC.asp?model=PCISA-LX (Flash Pm49FL004)
Info from pm49fl002/4's manual: Pm49fl002/4 write protected at power up.
This patch fix it.
--
Nikolay
diff -Nru LinuxBIOSv2-2978/util/flashrom/flashchips.c LinuxBIOSv2-2978-pm49fl00x/util/flashrom/flashchips.c
--- LinuxBIOSv2-2978/util/flashrom/flashchips.c 2007-10-30 05:56:50.000000000 +0500
+++ LinuxBIOSv2-2978-pm49fl00x/util/flashrom/flashchips.c 2007-11-23 11:25:04.000000000 +0500
@@ -83,9 +83,9 @@
{"SST49LF160C", SST_ID, SST_49LF160C, 2048, 4 * 1024 ,
probe_49lfxxxc, erase_49lfxxxc, write_49lfxxxc},
{"Pm49FL002", PMC_ID, PMC_49FL002, 256, 16 * 1024,
- probe_jedec, erase_chip_jedec, write_49fl004},
+ probe_49fl00x, erase_49fl00x, write_49fl00x},
{"Pm49FL004", PMC_ID, PMC_49FL004, 512, 64 * 1024,
- probe_jedec, erase_chip_jedec, write_49fl004},
+ probe_49fl00x, erase_49fl00x, write_49fl00x},
{"W29C011", WINBOND_ID, W_29C011, 128, 128,
probe_jedec, erase_chip_jedec, write_jedec},
{"W29C040P", WINBOND_ID, W_29C040P, 512, 256,
diff -Nru LinuxBIOSv2-2978/util/flashrom/flash.h LinuxBIOSv2-2978-pm49fl00x/util/flashrom/flash.h
--- LinuxBIOSv2-2978/util/flashrom/flash.h 2007-10-30 05:56:50.000000000 +0500
+++ LinuxBIOSv2-2978-pm49fl00x/util/flashrom/flash.h 2007-11-23 11:24:42.000000000 +0500
@@ -289,10 +289,10 @@
int erase_29f002(struct flashchip *flash);
int write_29f002(struct flashchip *flash, uint8_t *buf);
-/* pm49fl004.c */
-int probe_49fl004(struct flashchip *flash);
-int erase_49fl004(struct flashchip *flash);
-int write_49fl004(struct flashchip *flash, uint8_t *buf);
+/* pm49fl00x.c */
+int probe_49fl00x(struct flashchip *flash);
+int erase_49fl00x(struct flashchip *flash);
+int write_49fl00x(struct flashchip *flash, uint8_t *buf);
/* sharplhf00l04.c */
int probe_lhf00l04(struct flashchip *flash);
diff -Nru LinuxBIOSv2-2978/util/flashrom/Makefile LinuxBIOSv2-2978-pm49fl00x/util/flashrom/Makefile
--- LinuxBIOSv2-2978/util/flashrom/Makefile 2007-10-17 05:36:34.000000000 +0600
+++ LinuxBIOSv2-2978-pm49fl00x/util/flashrom/Makefile 2007-11-23 10:56:11.000000000 +0500
@@ -22,7 +22,7 @@
OBJS = chipset_enable.o board_enable.o udelay.o jedec.o sst28sf040.o \
am29f040b.o mx29f002.o sst39sf020.o m29f400bt.o w49f002u.o \
- 82802ab.o msys_doc.o pm49fl004.o sst49lf040.o sst49lfxxxc.o \
+ 82802ab.o msys_doc.o pm49fl00x.o sst49lf040.o sst49lfxxxc.o \
sst_fwhub.o layout.o lbtable.o flashchips.o flashrom.o \
sharplhf00l04.o w29ee011.o spi.o
diff -Nru LinuxBIOSv2-2978/util/flashrom/pm49fl004.c LinuxBIOSv2-2978-pm49fl00x/util/flashrom/pm49fl004.c
--- LinuxBIOSv2-2978/util/flashrom/pm49fl004.c 2007-10-18 05:55:15.000000000 +0600
+++ LinuxBIOSv2-2978-pm49fl00x/util/flashrom/pm49fl004.c 1970-01-01 05:00:00.000000000 +0500
@@ -1,51 +0,0 @@
-/*
- * This file is part of the flashrom project.
- *
- * Copyright (C) 2004 Tyan 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <stdio.h>
-#include "flash.h"
-
-extern int exclude_start_page, exclude_end_page;
-
-int write_49fl004(struct flashchip *flash, uint8_t *buf)
-{
- int i;
- int total_size = flash->total_size * 1024;
- int page_size = flash->page_size;
- volatile uint8_t *bios = flash->virtual_memory;
-
- printf("Programming page: ");
- for (i = 0; i < total_size / page_size; i++) {
- if ((i >= exclude_start_page) && (i < exclude_end_page))
- continue;
-
- /* erase the page before programming */
- erase_block_jedec(bios, i * page_size);
-
- /* write to the sector */
- printf("%04d at address: 0x%08x", i, i * page_size);
- write_sector_jedec(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");
- fflush(stdout);
- }
- printf("\n");
-
- return 0;
-}
diff -Nru LinuxBIOSv2-2978/util/flashrom/pm49fl00x.c LinuxBIOSv2-2978-pm49fl00x/util/flashrom/pm49fl00x.c
--- LinuxBIOSv2-2978/util/flashrom/pm49fl00x.c 1970-01-01 05:00:00.000000000 +0500
+++ LinuxBIOSv2-2978-pm49fl00x/util/flashrom/pm49fl00x.c 2007-11-23 11:43:47.000000000 +0500
@@ -0,0 +1,95 @@
+/*
+ * This file is part of the flashrom project.
+ *
+ * Copyright (C) 2004 Tyan 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdio.h>
+#include "flash.h"
+
+extern int exclude_start_page, exclude_end_page;
+
+static __inline__ int write_lockbits_49fl00x(volatile uint8_t *bios, int size,
+ unsigned char bits, int block_size)
+{
+ int i, left = size;
+
+ //printf("bios=0x%08lx\n", (unsigned long)bios);
+ for (i = 0; left >= block_size; i++, left -= block_size) {
+
+ /* pm49fl002 */
+ if (block_size == 16384 && i%2)
+ continue;
+
+ //printf("lockbits at address=0x%08lx is 0x%01x\n", (unsigned long)0xFFC00000 - size + (i * block_size) + 2, *(bios + (i * block_size) + 2) );
+ *(bios + (i * block_size) + 2) = bits;
+ //printf("lockbits at address=0x%08lx is 0x%01x\n", (unsigned long)0xFFC00000 - size + (i * block_size) + 2, *(bios + (i * block_size) + 2) );
+ }
+
+ return 0;
+}
+
+int probe_49fl00x(struct flashchip *flash)
+{
+ int ret = probe_jedec(flash);
+
+ if (ret == 1)
+ map_flash_registers(flash);
+
+ return ret;
+}
+
+int erase_49fl00x(struct flashchip *flash)
+{
+ int total_size = flash->total_size * 1024;
+ int page_size = flash->page_size;
+ write_lockbits_49fl00x(flash->virtual_registers, total_size, 0, page_size);
+ return erase_chip_jedec(flash);
+}
+
+int write_49fl00x(struct flashchip *flash, uint8_t *buf)
+{
+ int i;
+ int total_size = flash->total_size * 1024;
+ int page_size = flash->page_size;
+ volatile uint8_t *bios = flash->virtual_memory;
+
+ /* unprotected */
+ write_lockbits_49fl00x(flash->virtual_registers, total_size, 0, page_size);
+
+ printf("Programming page: ");
+ for (i = 0; i < total_size / page_size; i++) {
+ if ((i >= exclude_start_page) && (i < exclude_end_page))
+ continue;
+
+ /* erase the page before programming */
+ erase_block_jedec(bios, i * page_size);
+
+ /* write to the sector */
+ printf("%04d at address: 0x%08x", i, i * page_size);
+ write_sector_jedec(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");
+ fflush(stdout);
+ }
+ printf("\n");
+
+ /* protected */
+ write_lockbits_49fl00x(flash->virtual_registers, total_size, 1, page_size);
+
+ return 0;
+}
--
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