How to add/change spi nor flash support into sf_probe in uboot

[peng_cheng-hui]

Hi there,

I'm using a custom made i.MX6dl-sabresd board to develop our product. We change the spi flash to S25FL128S and I can't probe the flash corretly in u-boot. When I use

sf probe

in u-boot, I got message:

SF: Unsupported flash IDs: manuf 00, jedec 0000, ext_jedec 0000

Is there any document that explains how to add the support for new SPI NOR flash in U-boot? or what files I should update/modify to make S25FL128S be detected in u-boot and kernel?

For more detailed,
1. The custom made board is almost as same as standard i.MX6dl-sabresd reference board.

2. I don't have standard i.MX6dl-sabresd reference board now, so I can't try the "sf" command on it.
3. The BSP release used is  Yocto project 2.1(release L4.1.15_2.1.0).
4. Hardware changed eMMC, ram, spi flash from standard platform.

5. I'm NOT going to boot-up system from spi nor flash, I will boot it up from eMMC, I just want to make sure the spi nor flash is readable and writable.

Thank you for your patient.

Best Regards,
PENG, Cheng-Hui

[igorpadykov]

Hi PENG

please look at spi_flash_params_table in uboot/drivers/mtd/spi/sf_params.c
http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/tree/drivers/mtd/spi/sf_params.c?h=imx_v2016...

Best regards
igor
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[peng_cheng-hui]

Hi igorpadykov,

Thank you for your reply. I have checked my sf_params.c and the ID of new device is listed in the file. I measured the IC pins of spi flash and there is no clock out put. So I checked the circuit and it's different from reference board, the spi nor flash is connected to SPI3.

I tried to us command

sf probe X:0 (X=1 or 2 or 3)

but it still failed to init spi  flash.

Starting to read SPI device ID...
 spi_xchg_single: Timeout!
SF: Failed to get idcodes
Failed to initialize SPI flash at X:0 ( X= 1 or 2 or 3)

Should I change any settings or modify any files?

[tengri]

If you're using a different ecspi bus, make sure you have enabled the clock for it in u-boot !

 i.e. static void setup_spi(void){
      u32 reg;
      struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;

      // Enable ECSPI3 clocks
      reg = readl(&ccm->CCGR1);
      reg |= 0x30;
      writel(reg, &ccm->CCGR1);
}