[U-Boot] i.MX35PDK: Starting U-Boot from serial NOR-Flash

[Fabio Estevam]

Hi Michael,

On Mon, Jul 9, 2012 at 9:57 AM, Hornung, Michael <mhornung at init-ka.de> wrote:

> +++ b/board/freescale/mx35pdk/imximage.cfg
>
> +BOOT_FROM      spi

Please see the Freescale U-boot, you missed the initialization of the CS5:

  //WEIM config-CS5 init
  DCDGEN(1, 4, 0xB8002050, 0x0000d843)
  DCDGEN(1_1, 4, 0xB8002054, 0x22252521)
  DCDGEN(1_2, 4, 0xB8002058, 0x22220a00)

> +# DDR2 init
> +DATA 4 0xB8001010 0x00000304
> +DATA 4 0xB8001010 0x0000030C
> +DATA 4 0xB8001004 0x007ffc3f
> +DATA 4 0xB8001000 0x92220000
> +DATA 4 0x80000400 0x12345678
> +DATA 4 0xB8001000 0xA2220000
> +DATA 4 0x80000000 0x87654321
> +DATA 4 0x80000000 0x87654321
> +DATA 4 0xB8001000 0xB2220000
> +DATA 1 0x80000233 0xda
> +DATA 1 0x82000780 0xda
> +DATA 1 0x82000400 0xda
> +DATA 4 0xB8001000 0x82226080
> +DATA 4 0xB8001004 0x007ffc3f
> +DATA 4 0xB800100C 0x007ffc3f
> +DATA 4 0xB8001010 0x00000304
> +DATA 4 0xB8001008 0x00002000
>
>
> --- a/board/freescale/mx35pdk/lowlevel_init.S
> +++ b/board/freescale/mx35pdk/lowlevel_init.S
>
> init_sdram_start:
>         /*init_sdram*/
> -       setup_sdram
> +  /* setup_sdram */
>
>
> And here the result (output on the serial line):
>
> ---------------------------------------------------------------------------------------------------
> U-Boot 2012.04.01-00077-g48bcd18-dirty (Jul 09 2012 - 15:22:31)
>
> CPU:   Freescale i.MX35 rev 2.1 at 532 MHz.
> Reset cause: POR
> I2C:   ready
> ----------------------------------------------------------------------------------------------------
>
> And that's it, no more output after "I2C:   ready".  Perhaps you have some more hints about what to do?

Most likely it is because it will try to access the network, but you
missed to setup the CS5 as per the Freescale U-boot init sequence.

Regards,

Fabio Estevam