Re: [coreboot] Flashing problem with SST49LF004B

[malatesh kamatad]

Hi...
      But in the data sheet they have mentioned like the SST49LF00xB detects
whether it is being

accessed   via a FWH or LPC protocol by detecting the START field contents;
a 1101b or 1110b

indi-cates a Firmware Memory cycle and a 0000b indicates an LPC memory
cycle.

but when i checked the content in the empty SST chip it shows like this

[root at localhost http://www.coreboot.org/mailman/listinfo/coreboot
~]# hexdump sst_after_erase.bin
0000000 ffff ffff ffff ffff ffff ffff ffff ffff
*
0080000

from this i came to know that SST chip is working in LPC mode  as

compared  to  data sheet ...is  it  right?  i  am  totally  confusing....

please inform me how to find  whether chip is in FWH or LPC mode.

thanks in advance
Malatesh

On 05/04/2008, malatesh kamatad  wrote:
> Hello,
>   But the content after writing by using  below command shows result like
> this....
>
> [root@localhost ~]# /usr/local/sbin/flashrom -r | hexdump
>
> 0000000 6143 696c 7262 7461 6e69 2067 6564 616c
> 0000010 2079 6f6c 706f 2e2e 202e 4b4f 0a2e 6f4e
> 0000020 6320 726f 6265 6f6f 2074 6174 6c62 2065
> 0000030 6f66 6e75 2e64 460a 756f 646e 6320 6968
> 0000040 7370 7465 2220 4956 2041 5456 3238 3733
> 0000050 2c22 6520 616e 6c62 6e69 2067 6c66 7361
> 0000060 2068 7277 7469 2e65 2e2e 4f20 2e4b 530a
> 0000070 5453 3934 464c 3030 4134 422f 6620 756f
> 0000080 646e 6120 2074 6870 7379 6369 6c61 6120
> 0000090 6464 6572 7373 3020 6678 6666 3038 3030
> 00000a0 2e30 460a 616c 6873 7020 7261 2074 7369
> 00000b0 5320 5453 3934 464c 3030 4134 422f 2820
> 00000c0 3135 2032 424b 2e29 450a 7272 726f 203a
> 00000d0 6f4e 6620 6c69 6e65 6d61 2065 7073 6365
> 00000e0 6669 6569 2e64 000a
> 00000e7
>
> But using only hexdump i got result like this ...
>
> [root@localhost ~]# hexdump sst_after_write05.bin
> 0000000 ffff ffff ffff ffff ffff ffff ffff ffff
>
> 0080000
>
> Thanks.
> Malatesh
>
> On 04/04/2008, malatesh kamatad  wrote:
> > Ya .. after checking that file i got result like this ...it shows that
> > there is a content in that file
> >
> > [root@localhost ~]# hexdump sst_after_erase.bin
> > 0000000 ffff ffff ffff ffff ffff ffff ffff ffff
> >
> > 0080000
> >
> > I think erasing is not happened properly..
> >
> > Thanks..
> > malatesh
> >
> > On 04/04/2008, Corey Osgood  wrote:
> > > Ok, so if you open up the sst_after_erase.bin with a hex editor, is
> > > there anything in it? Does that match the data from the diff, or is it a
> > > binary ORing of the data from the diff? Do you have any other flash chips
> > > you can try on the board?
> > >
> > > On Fri, Apr 4, 2008 at 8:41 AM, malatesh kamatad <
> > > [e-mail]> wrote:
> > > > Ya i got result like this after comparing
> > > >
> > > > [root@localhost ~]# diff -us original.bin sst_after_write.bin
> > > > Binary files original.bin and sst_after_write.bin differ
> > > >
> > > > but its showing that there is a difference in between to files
> > > > ....
> > > >
> > > > i think write is not happening proper ....
> > > >
> > > > Thanks .
> > > > malatesh
> > > >
> > > > On 04/04/2008, Corey Osgood  wrote:
> > > > > what's the output of diff -us original.bin sst_after_write.bin?
> > > > > Can you download the bios from the manufacturer and see if flashing that
> > > > > works?
> > > > >
> > > > > -Corey
> > > > >
> > > > > On Fri, Apr 4, 2008 at 7:03 AM, malatesh kamatad <
> > > > > [e-mail]> wrote:
> > > > > > I worked with the step by step this is the output......
> > > > > >
> > > > > > [root@localhost ~]# flashrom -r original.bin
> > > > > > Calibrating delay loop... OK.
> > > > > > No coreboot table found.
> > > > > > Found chipset "VIA VT8237", enabling flash write... OK.
> > > > > > Pm49FL004 found at physical address 0xfff80000.
> > > > > > Flash part is Pm49FL004 (512 KB).
> > > > > > Reading Flash...done
> > > > > >
> > > > > > [root@localhost ~]# flashrom -E
> > > > > > Calibrating delay loop... OK.
> > > > > > No coreboot table found.
> > > > > > Found chipset "VIA VT8237", enabling flash write... OK.
> > > > > > SST49LF004A/B found at physical address 0xfff80000.
> > > > > > Flash part is SST49LF004A/B (512 KB).
> > > > > > Erasing flash chip
> > > > > >
> > > > > > [root@localhost ~]# flashrom -r sst_after_erase.bin
> > > > > > Calibrating delay loop... OK.
> > > > > > No coreboot table found.
> > > > > > Found chipset "VIA VT8237", enabling flash write... OK.
> > > > > > SST49LF004A/B found at physical address 0xfff80000.
> > > > > > Flash part is SST49LF004A/B (512 KB).
> > > > > > Reading Flash...done
> > > > > >
> > > > > > [root@localhost ~]# flashrom -w original.bin
> > > > > > Calibrating delay loop... OK.
> > > > > > No coreboot table found.
> > > > > > Found chipset "VIA VT8237", enabling flash write... OK.
> > > > > > SST49LF004A/B found at physical address 0xfff80000.
> > > > > > Flash part is SST49LF004A/B (512 KB).
> > > > > > Flash image seems to be a legacy BIOS. Disabling checks.
> > > > > > Programming page: 0007 at address: 0x00070000
> > > > > >
> > > > > > [root@localhost ~]# flashrom -r sst_after_write.bin
> > > > > > Calibrating delay loop... OK.
> > > > > > No coreboot table found.
> > > > > > Found chipset "VIA VT8237", enabling flash write... OK.
> > > > > > SST49LF004A/B found at physical address 0xfff80000.
> > > > > > Flash part is SST49LF004A/B (512 KB).
> > > > > > Reading Flash...done
> > > > > >
> > > > > > Thanks,
> > > > > > Malatesh.
> > > > > >
> > > > > > On 04/04/2008, malatesh kamatad  wrote:
> > > > > > >
> > > > > > > Hi..
> > > > > > >
> > > > > > >          We are having two BIOS i.e, PM49FL004( motherboard's
> > > > > > > BIOS) and empty flashrom
> > > > > > >
> > > > > > >         SST49LF004B ..
> > > > > > >
> > > > > > >        We are trying to flash the content of PM49FL004 to
> > > > > > > SST49LF004B flashrom
> > > > > > >
> > > > > > >         according to your suggestion we have done ..we are
> > > > > > > getting output  as bellow..
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > [root@localhost ~]# flashrom -E
> > > > > > >
> > > > > > > Calibrating delay loop... OK.
> > > > > > >
> > > > > > > No coreboot table found.
> > > > > > >
> > > > > > > Found chipset "VIA VT8237", enabling flash write... OK.
> > > > > > >
> > > > > > > SST49LF004A/B found at physical address 0xfff80000.
> > > > > > >
> > > > > > > Flash part is SST49LF004A/B (512 KB).
> > > > > > >
> > > > > > > Erasing flash chip
> > > > > > >
> > > > > > > Erasing page: 0007 at address: 0x00070000
> > > > > > >
> > > > > > > [root@localhost ~]# flashrom -r malateh.bin
> > > > > > >
> > > > > > > Calibrating delay loop... OK.
> > > > > > >
> > > > > > > No coreboot table found.
> > > > > > >
> > > > > > > Found chipset "VIA VT8237", enabling flash write... OK.
> > > > > > >
> > > > > > > SST49LF004A/B found at physical address 0xfff80000.
> > > > > > >
> > > > > > > Flash part is SST49LF004A/B (512 KB).
> > > > > > >
> > > > > > > Reading Flash...done
> > > > > > >
> > > > > > > [root@localhost ~]# flashrom -w malateh.bin
> > > > > > >
> > > > > > > Calibrating delay loop... OK.
> > > > > > >
> > > > > > > No coreboot table found.
> > > > > > >
> > > > > > > Found chipset "VIA VT8237", enabling flash write... OK.
> > > > > > >
> > > > > > > SST49LF004A/B found at physical address 0xfff80000.
> > > > > > >
> > > > > > > Flash part is SST49LF004A/B (512 KB).
> > > > > > >
> > > > > > > Flash image seems to be a legacy BIOS. Disabling checks.
> > > > > > >
> > > > > > > Programming page: 0007 at address: 0x00070000
> > > > > > >
> > > > > > > [root@localhost ~]# flashrom -v malateh.bin
> > > > > > >
> > > > > > > Calibrating delay loop... OK.
> > > > > > >
> > > > > > > No coreboot table found.
> > > > > > >
> > > > > > > Found chipset "VIA VT8237", enabling flash write... OK.
> > > > > > >
> > > > > > > SST49LF004A/B found at physical address 0xfff80000.
> > > > > > >
> > > > > > > Flash part is SST49LF004A/B (512 KB).
> > > > > > >
> > > > > > > Flash image seems to be a legacy BIOS. Disabling checks.
> > > > > > >
> > > > > > > Verifying flash... VERIFIED.
> > > > > > >
> > > > > > >
> > > > > > >  After that we tried to boot the system by SST49lf004B but
> > > > > > > system is not rebooting....
> > > > > > >
> > > > > > > So we want to flash the content of the Pm49fl004 to SST49lf004
> > > > > > > so that our system can boot
> > > > > > >
> > > > > > > using SST49lf004....
> > > > > > >
> > > > > > > thanks,
> > > > > > > Malatesh..
> > > > > > >
> > > > > > >
> > > > > > > On 04/04/2008, bari  wrote:
> > > > > > > >
> > > > > > > > Try Peters suggestion of reading the flash after an erase
> > > > > > > > and see what is there.
> > > > > > > >
> > > > > > > > If it is erased, read back after you have tried to write and
> > > > > > > > compare.
> > > > > > > >
> > > > > > > > See what is or is not happening.
> > > > > > > >
> > > > > > > > -Bari
> > > > > > > >
> > > > > > > > malatesh kamatad wrote:
> > > > > > > >
> > > > > > > > > Hi...
> > > > > > > > >       I am working on ASRock motherboard .....in FWH
> > > > > > > > > mode...
> > > > > > > > >
> > > > > > > > > with regards.
> > > > > > > > > Malatesh
> > > > > > > > >
> > > > > > > > > On 03/04/2008, *bari* <[e-mail]  > > [e-mail]>> wrote:
> > > > > > > > >
> > > > > > > > >    malatesh kamatad wrote:
> > > > > > > > >
> > > > > > > > >
> > > > > > > > >        Hi all..
> > > > > > > > >              I have worked with PM49fl00x.diff patch ,its
> > > > > > > > > worked fine
> > > > > > > > >        and i got the output as below
> > > > > > > > >
> > > > > > > > >    The PM49fl00x can work in LPC and FWH modes. Do you
> > > > > > > > > know which
> > > > > > > > >    mode is being used?
> > > > > > > > >    What mainboard did you test this in?
> > > > > > > > >
> > > > > > > > >                           Now i am working on SST49LF004B
> > > > > > > > >                                          33-4C-NHE
> > > > > > > > >                                          0710022-CA   with
> > > > > > > > > the
> > > > > > > > >         motherboard  K8Upgrade-VM800
> > > > > > > > >                         The flashrom detect flash device
> > > > > > > > > on this
> > > > > > > > >        board, But the erasing and writting operation is
> > > > > > > > > not happening
> > > > > > > > >        properly
> > > > > > > > >          hier flashrom output :
> > > > > > > > >    Is this the board by ASRock?
> > > > > > > > >
> > > > > > > > >    -Bari
> > > > > > > > >
> > > > > > > > >
> > > > > > > > >
> > > > > > > > >
> > > > > > > >
> > > > > > >