[U-Boot] Problem with flash on a MPC5200B board

[Sylvain Lamontagne]

Humm ... Nobody can help me ?
If you need more informations I can get them, I would really like to
understand the debug output I'm seeing.

Thank you

Sylvain

2008/10/7 Sylvain Lamontagne <sylvain.lamontagne at gmail.com>

> Hi Everyone
>
> I'm pretty new to U-Boot and Embedded system globally, but in the last few
> weeks I have learn a lot and I'm now trying to port correctly U-Boot v 1.3.4
> to a custom board based on a Icecube. I'm able to boot a linux kernel with
> it when I use the RAM with the bootm command.
>
> Unfortunately, I must make it work with the FLASH. The chip used for the
> flash is a S29GL128 or a S29GL256 from Spansion, they are 16bits chips but
> the bus is only 8bits. By reading the datasheet, these chips are supposed to
> support the Common Flash Interface so I'm trying to make then work with the
> CFI driver of U-Boot.
>
> Here is what I get when booting with DEBUG activated:
>
> U-Boot 1.3.4 (Oct  7 2008 - 16:39:49)
>>
>> CPU:   MPC5200B v2.2, Core v1.4 at 378 MHz
>>       Bus 84 MHz, IPB 84 MHz, PCI 21 MHz
>> Board: Icecube Based Board
>> I2C:   93 kHz, ready
>> DRAM:  64 MB
>> Top of RAM usable for U-Boot at: 04000000
>> Reserving 551k for U-Boot at: 03f76000
>> Reserving 130k for malloc() at: 03f55800
>> Reserving 68 Bytes for Board Info at: 03f557bc
>> Reserving 60 Bytes for Global Data at: 03f55780
>> Stack Pointer at: 03f55768
>> New Stack Pointer is: 03f55768
>> Now running in RAM - U-Boot at: 03f76000
>> FLASH: flash detect cfi
>> fwc addr ff000000 cmd f0 f0 8bit x 8 bit
>> fwc addr ff000000 cmd f0 f0 8bit x 8 bit
>> fwc addr ff000055 cmd 98 98 8bit x 8 bit
>> is= cmd 51(Q) addr ff000010 is= 0 51
>> fwc addr ff000555 cmd 98 98 8bit x 8 bit
>> is= cmd 51(Q) addr ff000010 is= 0 51
>> fwc addr ff000000 cmd f0 f0f0 16bit x 8 bit
>> fwc addr ff000000 cmd f0 f0f0 16bit x 8 bit
>> fwc addr ff0000aa cmd 98 9898 16bit x 8 bit
>> is= cmd 51(Q) addr ff000020 is= 5151 5151
>> is= cmd 52(R) addr ff000022 is= 5252 5252
>> is= cmd 59(Y) addr ff000024 is= 5959 5959
>> device interface is 2
>> found port 2 chip 1 port 16 bits chip 8 bits
>> 00 : 51 52 59 02 00 40 00 00 00 00 00 27 36 00 00 06  QRY.. at .....'6...
>> 10 : 06 09 13 03 05 03 02 19 02 00 06 00 01 ff 00 00  ................
>> 20 : 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20  ...............
>> fwc addr ff000000 cmd f0 f0f0 16bit x 8 bit
>> fwc addr ff001554 cmd aa aaaa 16bit x 8 bit
>> fwc addr ff000aaa cmd 55 5555 16bit x 8 bit
>> fwc addr ff001554 cmd 90 9090 16bit x 8 bit
>> fwc addr ff000000 cmd f0 f0f0 16bit x 8 bit
>> fwc addr ff0000aa cmd 98 9898 16bit x 8 bit
>> manufacturer is 2
>> manufacturer id is 0x5
>> device id is 0x56
>> device id2 is 0x0
>> cfi version is 0x3133
>> size_ratio 1 port 16 bits chip 8 bits
>> found 1 erase regions
>> erase region 0: 0x020000ff
>> erase_region_count = 256 erase_region_size = 131072
>> ERROR: too many flash sectors
>> fwc addr ff000000 cmd f0 f0 8bit x 8 bit
>> flash_protect ON: from 0xFFF00000 to 0xFFF43FFF
>> flash_protect ON: from 0xFFFE0000 to 0xFFFFFFFF
>> 32 MB
>> basetask = 0, tasks = 2
>> task_org = 0x03fb4c00
>> TDT start = 0x00000040, end = 0x000001b8
>> PCI:   Bus Dev VenId DevId Class Int
>> PCI Scan: Found Bus 0, Device 24, Function 0
>>        00  18  168c  001b  0200  00
>> PCI Scan: Found Bus 0, Device 26, Function 0
>>        00  1a  1057  5809  0680  00
>> In:    serial
>> Out:   serial
>> Err:   serial
>> U-Boot relocated to 03f76000
>> Net:   mpc5xxx_fec_init_phy... Begin
>> mpc5xxx_fec_init_phy... Done
>> FEC ETHERNET
>>
>> Type "boot" to boot to Linux (default)
>> Type "help" for a list of commands
>
>
> So I got an "ERROR: too many flash sectors" and a 32 MB size ... I know for
> sure that the chip is 16 MB so there is a kind of inconsistency...
> I'm also a bit confuse about what "#define" I should use to force my board
> to communicate in 8bit even if it's capable of 16bit.
> I though that I simply had to "#undef FLASH_CFI_16BIT" but that doesn't
> seem to do the trick.
>
> I'm not sure to understand the debug output I got...
> fwc addr ff000000 cmd f0 f0 8bit x 8 bit
> ...
> fwc addr ff000000 cmd f0 f0f0 16bit x 8 bit
>
> Also is the value of erase_region_count = 256 should be the number of
> sector on the chip ???? Because I know that the ship have a maximum of 128
> sectors...
> If someone could brief me a bit about the debug output posted above I would
> greatly appreciate.
>
> I'm pretty sure I have nearly complete the port except for this FLASH
> issue...
>
> Help/Suggestion/Comments are welcome
>
> Thank you
>
> Sylvain
>