281 lines
11 KiB
Text
281 lines
11 KiB
Text
NOTE! NOTE! NOTE! NOTE! NOTE! NOTE! NOTE! NOTE! NOTE! NOTE! NOTE! NOTE!
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/dev/bios is obsolete and no longer under development.
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Please use the flashrom utility instead: https://www.flashrom.org/
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NOTE! NOTE! NOTE! NOTE! NOTE! NOTE! NOTE! NOTE! NOTE! NOTE! NOTE! NOTE!
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ChangeLog for /dev/bios
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** 2004/03/31 ********************************************************
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* Added fix from Alex Beregszaszi to remove global *bios
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** 2004/03/05 ********************************************************
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* fix compiling for 2.6 kernels.
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** 03/06/04 **********************************************************
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* add SST49LF080A
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* small 2.5 fix.
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** 02/06/10 **********************************************************
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* some changes to detect pci cards firmware.
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* pci cards firmware can be read even if flashing is not possible.
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This is a new feature and might cause problems on some systems.
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** 02/04/16 **********************************************************
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* reorganize Makefile, include .config from kernel.
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* platform fixes for clean compilation.
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** 02/04/12 **********************************************************
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* proprietary x86-64 support.
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* change ruffian probe address
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** 02/03/28 **********************************************************
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* proper implementation of system firmware detection on LX164 Alphas
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* partly include jedec command cleanup patch from Pierrick Hascoet
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<pierrick.hascoet@hydromel.net>
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** 02/03/11 **********************************************************
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* only probe 512k on CS5530(A)
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* add EON EN29F002 chips.
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** 02/02/22 **********************************************************
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* rewrite major parts of bridge probing to make driver more generic.
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* add Ali chipset support
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* Saner iounmap() of flash devices.
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** 02/02/18 * 0.3.2 **************************************************
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* change cs5530 driver to map high rom range instead of low one
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and don't use positive decode.
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* remove ruffian flag. Alpha (164LX/UX) almost works with pc code.
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* don't rely on register defaults in intel 8xx driver.
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* updated pci device list. more entries, join amd and via entry.
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* fix error handling in chipset detection.
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* add support for Reliance/ServerWorks chipsets
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* enable 1M 512k on intel 4x0 chips where it's possible
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* cleanup proc file handling
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** 02/02/17 **********************************************************
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* rewrote chipset initialisation skeleton.
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* fix pci bios (un)mapping.
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* experimental support for AlphaPC 164UX (Ruffian)
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(probes at 0xfffffffffffc0000 instead of 0xfffffc87C0000000
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* initial code for FWH mode chips
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* Fix Toggle-Until-Ready code.
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** 02/02/16 **********************************************************
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* iounmapping fixed. no more address space wasted.
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* /proc/bios shows physical address now. dmesg shows
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physical address and virtual memory area and offset.
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** 02/02/13 **********************************************************
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* added i820/i830 chipset support
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* added AMD 751/760MP(X) support
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* added support for Itanium and 84460GX chipset
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* added experimental support for some flash chips (ST, Intel,
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Winbond)
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* use spinlocks instead of hard cli()
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** 02/02/11 **********************************************************
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* added GPL licence tag
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* remove low bios area access tweaking for intel drivers
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* speed up SST 39SF020 write
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* fix compilation for 2.5 kernels
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** 02/02/05 **********************************************************
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* added support for cs5530 (nsc/cyrix mediagx) chipset
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* reorganized shadow/wp handling
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* probe for 2mb high memory area instead of 256k only
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** 01/08/01 * 0.3.1 **************************************************
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* compiles and works with Linux kernel 2.4
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* rewrote flash chip probing
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* always use ioremap now
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* flash chips above 128k should work transparent
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* Support for newer VIA chipsets
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** 00/10/15 * 0.3.0pre1 **********************************************
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* added patch from Eric Estabrook
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* support for 256k flash chips on intel 430/440 chipsets and via vp3
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* split up source into several files
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* Changes for Ruffian AXP machines. Does not work (yet).
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** 99/07/29 * 0.2.101 ************************************************
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* Oh well.. 11 months? Impossible. I am a lazy guy. Implemented
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some support for VIA Apollo VP3. Don't know whether it works, since
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I don't have one.
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** 98/09/06 **********************************************************
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patches by prumpf@jcsbs.lanobis.de:
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* The pointer to bios_release in bios.c was on the flush pointer's
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position. This caused Oopses.
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* When bios_read was called with a file position after the actual end
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of bios, it tried to read non-existant memory positions due to size
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being unsigned (it isn't anymore) , causing spontaneous reboots on
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my system
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** 98/08/22 **********************************************************
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* Well,.. The diskless spectacle (0.2.100) was caused by a little bug
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in in handling Intel PCI chipsets. Works now.
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* Threw out the chipset_backout stuff. the PCI chipset handling should
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always leave the machine in the same state it was before. ALWAYS.
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** 98/08/18 * 0.2.100 ************************************************
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* Threw out the mem_type stuff. There are more important things than
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this.
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* Argh! After flashing fine on an Intel 28F001BT, the computer kept
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hanging in an endless loop and refused writing the emergency boot
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block to the end :-( There's some work until 0.3 is ready.
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Implemented a timeout so that the system will not hang forever if
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the flashchip behaves unexpected.
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* Removed x86 probing in a loop. I think it never found anything else
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but the system bios and *maybe* the graphics adapter bios. On the
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other hand, it reconfigures some networking cards to silence.
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Bad thing on diskless Linux boxes :)
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** 98/08/15 **********************************************************
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* added some changes for intel to compile without warnings..
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** 98/08/02 **********************************************************
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* What a boring job! Checked some dozen of flash chip entries today
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and added a lot of new ones. I bet it gets hard to find anything
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this driver does not know.
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** 98/07/28 **********************************************************
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* Yeah! Atmel Chips finally work.. These Atmel guys are really weird.
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* Testing last instead of first written byte now, when polling for the
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end of a write access.
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** 98/07/28 **********************************************************
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* Well, I am definitely spending too much time in IRC, but detecting
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PCI cards' bioses works now (at least for me)
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* Thrown out some obsolete stuff.
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* Declared PCI and Flash reading/writing __inline__. Don't know,
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whether this is a good idea. But let's try it for a while.
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* Aaaargh! Some major mistakes in handling whether a flash has to
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be erased before programming. FIXED!
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* Even worse. An endless loop made it into writing in 0.2.99. Sorry!
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I had no chance to test writing on an intel board with that release.
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At least my warning, not to write, made sense.
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* Intel flashchips are supported now!! It's at least tested on my
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Alpha AXP LX164 Board (1MByte i28f008 chip) But all Intel flash chips
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seem to work in the same way.
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* Atmel 64kByte flash chips supported.
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** 98/07/27 **********************************************************
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* Split up flash_probe in 2 parts to be able to expand probing on
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PCI bioses and others correctly.
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* Turned around 1st and 2nd probing codes. This is funny, Atmel
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Flashroms give some wrong numbers if they are probed with the
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0x80/0x60 way. I only hope that no flashchips react on the
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0x90 method with wrong values.
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** 98/07/19 * V0.2.99 ************************************************
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* Reading the flashchip works now on Alpha AXP (at least on my LX164
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Board)
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Writing ought to work, too, but Intel Flashchips are not supported
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yet. This should be done until 0.3.0.
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NOTE: I have no idea whether this driver still works on intel
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boards or not. There have been too many changes. Please try, but
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do not flash with this release of the driver.
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* Minor Changes and fixes. Naming scheme changed a bit. This version
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might work on James Mastros' machine again ?!?
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** 98/07/11 **********************************************************
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* Started porting stuff to Alpha AXP architecture to continue testing
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the flashing routines. We have a lot of tests next week, so I
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won't get much stuff done..
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Porting to AXP seems to be much more work than I thought. It may
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take some time until the next version is released.
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* Moved major number again. This time we have an official major
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number for /dev/bios. Thanks to Hans Peter Anvin.
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(Well, we have this one since May 1st, sorry for the delay)
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** 98/06/26 * V0.2.95 ************************************************
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* added all Manufacturer IDs from the JEDEC standards publication.
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* sorry for not having released a new version since months, but
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my x86 machine died and I have no chance to do any testing right
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now. I guess I must get a new Intel box, as Alpha AXP are all
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delivered with the same Intel flash chips.
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** 98/04/30 * V0.2.9 *************************************************
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* removed ioctls. They have been really unneccesary and did not fit
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into the new driver layout.
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* cleaned up the code. Hey, it should be readable again.
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* Moved device minors from 10+ to 0+
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* Rewrote most of the documentation
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* changed intel shadowing routines. Now original values are saved
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and shadowing is turned off for 0xc0000 to 0xdffff, too (This
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was needed to support 2MBit system bios flash chips. Thanks again
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to Matthew Harrell for intensive testing.
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* Removed dirty hacks from bios_read_proc()
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* Added some fields to struct flashdevice to support all ROM types,
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not only flash roms. Probing for other types still missing.
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* Implemented probing for some strange Winbond chips (0x80/0x20).
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** 98/04/27 * V0.2.8 *************************************************
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*** Attention *** This version has a lot of changes since
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0.2.7, so be very careful, when testing. Things may
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be broken that used to work.
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* Rewrote big parts of the driver to (theoretically) support
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multiple flash chips and/or ROM areas.
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* Tried to implement support for 2MBit System BIOS chips, but
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I have no idea, whether it works. I don't have one.
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* added some more OPTi, SiS and VIA PCI chipsets to chipset list.
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They have no function yet, though.
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* Some weird computers have an ISA bridge, but don't have it declared
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as one. Now probing for known ISA bridge IDs. (Thanks to Matthew
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Harrell for reporting this.)
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* Added some new flashchip IDs and made some old ones work.
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** 98/04/24 * V0.2.7 *************************************************
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* rewrote shadowing and wp functions to use a pci_functions structure
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This makes it very easy to include new PCI chipsets.
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* function chipset_init() detects PCI chipset.
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* modversions support. Thanks to Matthew Harrell.
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* moved PCI bridge detection to chipset_init()
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** 98/04/23 * V0.2.6 *************************************************
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* repaired flashchip_ready_toggle and flashchip_ready_poll.
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* Set WRITE_DELAY to 300 as it should be (works now)
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* NOTE: These two changes make the operation of /dev/bios
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theoretically correct, and by that quite secure.
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**********************************************************************
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There was no ChangeLog for versions prior to 0.2.6
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