flashrom February 2015

flashrom@flashrom.org

30 participants
77 discussions

0x05 TPM error in read-only firmware on Samsung Cromebook XE303C12
by Jaroslav Pšenička 08 Feb '15

08 Feb '15

Hi all, I've got the "0x05 TPM error in read-only firmware" on my Samsung Cromebook XE303C12, it looks like the TPM chip is dead and does not communicate. Is there a chance to bypass the chip, e.g. b flushing a custom firmware (and using Linux, because the ChromeOS requires secure boot)? If so, is nv-U-Boot the correct firmware? If not, is it possible to (unsolder and) replace the chip? I understand the chip holds the security key, so, it should be pre-programmed first? Thank you, Jaroslav

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Re: [flashrom] [PATCH] Add support for Spansion S25FL127S.
by Stefan Tauner 08 Feb '15

08 Feb '15

On Sun, 7 Dec 2014 11:02:35 +0100 Stefan Tauner <stefan.tauner(a)alumni.tuwien.ac.at> wrote: > This flash chip can be configured (one time) to use 64 KiB or 256 KiB sectors. > Additionally, in the 64 KiB mode it supports 16 4 KiB sub-sectors that can be > (one time) programmed to be on the top or bottom of the device. The sub-sectors > can be erased with the 0x20 opcode but because this opcode does not work > with the remaining sectors and flashrom can not cope with that the 0x20 > opcode is not supported yet. > > This patch adds two definitions, one for the 64 KiB and 256 KiB configuration > respectively. The device also shares the RDID with the various S25FL128 > devices so we have to increase the maximum number of successfully probed > chips to 8. > > The 64 KiB mode was tested on real hardware. > > Signed-off-by: Jernej Škrabec <jernej.skrabec(a)planet.si> > Signed-off-by: Stefan Tauner <stefan.tauner(a)alumni.tuwien.ac.at> I have committed this patch in r1858 because Jernej told me that he *currently* is unable to test the patch on real hardware. Since the modifications were minor there shouldn't be any issues though. -- Kind regards/Mit freundlichen Grüßen, Stefan Tauner

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Re: [flashrom] [PATCH 2/3] Add support for SPARC (maybe).
by Carl-Daniel Hailfinger 07 Feb '15

07 Feb '15

On 19.01.2015 21:39, Stefan Tauner wrote: > Does (cross-)compile but is not run-tested. > > Signed-off-by: Stefan Tauner <stefan.tauner(a)alumni.tuwien.ac.at> > Acked-by: Stefan Tauner <stefan.tauner(a)alumni.tuwien.ac.at> > --- > Makefile | 2 +- > hwaccess.h | 8 ++++++++ > platform.h | 5 ++++- > 3 files changed, 13 insertions(+), 2 deletions(-) hwaccess.c needs to be patched as well. Specifically, static inline void sync_primitive(void) needs either a comment why sync_primitive is unneeded or a a code snippet with correct code. Not sure if I read http://lxr.free-electrons.com/source/arch/sparc/include/asm/barrier_64.h#L47 correctly, but we may need __asm__ __volatile__("membar #StoreLoad":::"memory") Mh. That might not be needed if /dev/mem uses a special access mode which enforces memory access ordering in Sparc. Someone else with Sparc knowledge needs to check this. That said, the patch looks correct apart from the missing hwaccess.c stuff mentioned above. Regards, Carl-Daniel

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Re: [flashrom] Add PICkit2 as an SPI programmer
by Riccardo Delpopolo Carciopolo 06 Feb '15

06 Feb '15

The trunk version didn't compile with the patch. Checked out the 1817 version, applied the patch, compiled and successfully read and write a Pm25LD020 2Mbit SPI Thank you!

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Test-Results for "Pm25LV512(A)"
by The Raven 04 Feb '15

04 Feb '15

Hello :-) Here are the results for this chip. Tested with Arduino (serprog). Probing: OK Reading: OK Erasing: OK Writing: OK The writing (sign) on the Chip is: Pm25LV512 AE1034 M23360LG Should i test something else? BTW: This chip was found on a "newer" nvidia graphic card (GF108 / Gforce GT430 / 1GB Ram).

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Re: [flashrom] Test Results for SST SST39VF020
by Stefan Tauner 04 Feb '15

04 Feb '15

On Wed, 4 Feb 2015 10:00:02 +0200 Urja Rannikko <urjaman(a)gmail.com> wrote: > All works, tested on that avr serprog thing of mine and r1878 of flashrom. > > I first read the contents (not logged), then erased it, checked the > erase, and wrote 256k of /dev/urandom into it (which flashrom > verified). > Hello Urja, thanks for your report! I have marked the flash chip as fully tested and will commit that later together with other small changes. -- Kind regards/Mit freundlichen Grüßen, Stefan Tauner

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Test Results for SST SST39VF020
by Urja Rannikko 04 Feb '15

04 Feb '15

All works, tested on that avr serprog thing of mine and r1878 of flashrom. I first read the contents (not logged), then erased it, checked the erase, and wrote 256k of /dev/urandom into it (which flashrom verified). -- Urja Rannikko

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flashrom February 2015