Re: Invalid ONFI PARAM PAGE

[Marco Felsch <m.felsch@pengutronix.de>]

Hi Miquel,

thanks for your response :)

On 20-08-03 10:47, Miquel Raynal wrote:
> Hi Marco,
> 
> Marco Felsch <m.felsch@pengutronix.de> wrote on Thu, 30 Jul 2020
> 14:14:25 +0200:
> 
> > Hi,
> > 
> > a customer of us uses micron nand flash devices for their local storage.
> > They are now having some troubles with a few devices. Let me start with
> > the following:
> >   1) We can successfully read the nand id field by:
> >      -> select_chip
> >      -> cmdfunc(mtd, NAND_CMD_RESET)
> >      -> cmdfunc(mtd, NAND_CMD_READID) Addr=0x00
> >      -> 8times: read_byte(mtd)  
> > 
> >      The NAND device response with the following:
> >      nand: id_data[0]: 0x2c
> >      nand: id_data[1]: 0xdc
> >      nand: id_data[2]: 0x90
> >      nand: id_data[3]: 0x95
> >      nand: id_data[4]: 0x56
> >      nand: id_data[5]: 0x0
> >      nand: id_data[6]: 0x0
> >      nand: id_data[7]: 0x0
> > 
> >      Accroding the schematic and the datasheet this is right.
> > 
> >   2) To detect the ONFI compatibility we now issue:
> >      -> cmdfunc(mtd, NAND_CMD_READID) Addr=0x20  
> > 
> >      and getting the expected 'O','N','F','I' signature.
> > 
> >    3) Now we are trying to Read the PARAM Page by:
> >       -> cmdfunc(mtd, NAND_CMD_PARAM)
> >       -> try to read the the param page and if not successful try to  
> >          read the copies.
> > 
> >       Here things getting crazy since we are reading all the time '0xff'.
> > 
> >    4) Since Barebox (Bootloader) can't read the ONFI param page we
> >       calculate the values as expected from the param page. But now we
> >       can't access BBT (not found) nor we are not able to write to the
> >       OOB Area (the chip is not write protected).
> > 
> > The electrical signals are looking good and since we can retrieve the
> > id-data it should be no PCB bug. Did anyone struggled with such problems
> > too?
> > 
> > BTW:
> > I also get '0xff' if I send a READ_UNIQUE_ID command and trying to read
> > the 16 copies of the 32byte unique-id.
> > 
> > Any answers are welcome :)
> 
> Could you share more details about the situation your customer is
> facing? Did this work before? Is this an update? If yes from what
> version to what version? Also, is this a Linux or Barebox issue?

This issue get's triggered right after the first start-up. Some devices
do work and some of them don't after the production. I think it's not a
Linux nor a Barebox issue. Since Barebox can't find the BBT and all
other stuff I skipped propper Linux tests. I will test if Linux can
identify and setup the chip. But I think Linux will setp into the same
NAND-Issues.

I asked on this ML since you guys are the Experts here and maybe you had
see a 'not full prefactored' NAND device too.

Regards,
  Marco

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