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This patch removes the extremely dangerous unprotect_jedec function which is not used at all within flashrom code, and renames the misleadingly named protect_jedec function to start_program_jedec. Calls to protect_jedec after flashing are removed, because a) on LPC chips, the command sent by protoct_jedec is not even in the datasheet and b) on parallel chips, the block write command issued before already contained the software protection sequence, so software protection is definitely enabled. This patch also removes two clones of protect_jedec Background: JEDEC Software Data Protection started as an optional feature, which was disabled on the first single-voltage-flash chips. The software data protection is the need to prefix a write with a magic "write enable" command, while without write protection every write access into the chip's address space modifies flash content. This magic write enable command also tells the flash chip that the programmer obviously support sending write-enable commands and turns off the "any write modifies flash content" mode. There also exist a two-command (6 writes) sequence that disables Software Data Protection completey, which should only ever be used to prepare updating with a device that can't handle software data protection. Corresponding to flashrom svn r783. Signed-off-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de> Acked-by: Sean Nelson <audiohacked@gmail.com> Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
------------------------------------------------------------------------------- flashrom README ------------------------------------------------------------------------------- flashrom is a utility for detecting, reading, writing, verifying and erasing flash chips. It is often used to flash BIOS/EFI/coreboot/firmware images in-system using a supported mainboard, but it also supports flashing of network cards (NICs), SATA controller cards, and other external devices which can program flash chips. It supports a wide range of DIP32, PLCC32, DIP8, SO8/SOIC8, TSOP32, and TSOP40 chips, which use various protocols such as LPC, FWH, parallel flash, or SPI. Packaging --------- To package flashrom and remove dependencies on subversion, either use make export or make tarball make export will export all flashrom files from the subversion repository at revision BASE into a directory named $EXPORTDIR/flashrom-$VERSION-r$SVNREVISION and will additionally modify the Makefile in that directory to contain the svn revision of the exported tree. make tarball will simply tar up the result of make export and gzip compress it. The snapshot tarballs are the result of make tarball and require no further processing. Build Instructions ------------------ To build flashrom you need to install the following packages or ports: Linux et al: * pciutils / libpci * pciutils-devel / pciutils-dev / libpci-dev * zlib-devel / zlib1g-dev (only needed if libpci is static) On FreeBSD, you need the following ports: * devel/gmake * devel/libpci To compile on Linux, use: make To compile on FreeBSD, use: gmake To compile on Nexenta, use: make To compile on Solaris, use: gmake LDFLAGS="-L$pathtolibpci" CC="gcc -I$pathtopciheaders" CFLAGS=-O2 To compile on DragonFly BSD, use: ln -s /usr/pkg/include/pciutils pci gmake CFLAGS=-I. LDFLAGS="-L/usr/pkg/lib" To compile and run on Darwin/Mac OS X: Install DirectIO from coresystems GmbH. DirectIO is available at http://www.coresystems.de/en/directio. Installation ------------ In order to install flashrom and the manpage into /usr/local, type: make install For installation in a different directory use DESTDIR, e.g. like this: make DESTDIR=/usr install If you have insufficient permissions for the destination directory, use sudo by adding sudo in front of the commands above. Usage / Options --------------- Please see the flashrom(8) manpage. Exit status ----------- Please see the flashrom(8) manpage. coreboot Table and Mainboard Identification -------------------------------------------- Please see the flashrom(8) manpage. ROM Layout Support ------------------ Please see the flashrom(8) manpage. Supported Flash Chips / Chipsets / Mainboards --------------------------------------------- Please check the output of 'flashrom -L' for the list of supported flash chips, chipsets/southbridges, mainboards, and flash programmers. Contact ------- The official flashrom website is: http://www.flashrom.org/ The IRC channel is #flashrom at irc.freenode.net The Mailing list addess is flashrom@flashrom.org