[PATCH 2/2] imx8mm_evk: Add Serial Download Protocol support

[Fabio Estevam]

Hi Peng,

On Tue, Sep 20, 2022 at 3:56 AM Peng Fan <peng.fan at oss.nxp.com> wrote:
>
> Hi Fabio,
>
> Just have a question, the tcpci driver is not supported, so how
> do you manage to make SDP work?

I understand that the tcpci driver is required when a USB role switch is needed.

I am only using the usbotg1 as a peripheral.

Here are the logs:

On the host PC:

$ sudo uuu -brun spl flash.bin

On the console:

U-Boot SPL 2022.10-rc5-00003-g9e02955991-dirty (Sep 19 2022 - 21:49:01 -0300)
No pmic
SEC0:  RNG instantiated
Normal Boot
WDT:   Started watchdog at 30280000 with servicing (60s timeout)
Trying to boot from USB SDP
SDP: initialize...
SDP: handle requests...
Downloading file of size 885712 to 0x40400000... done
Jumping to header at 0x40400000
Header Tag is not an IMX image
Found header at 0x40420400
NOTICE:  BL31: v2.2(release):rel_imx_5.4.47_2.2.0-0-gc949a888e
NOTICE:  BL31: Built : 17:18:02, Sep 19 2022


U-Boot 2022.10-rc5-00003-g9e02955991-dirty (Sep 19 2022 - 21:49:01 -0300)

CPU:   Freescale i.MX8MMQ rev1.0 at 1200 MHz
Reset cause: POR
Model: FSL i.MX8MM EVK board
DRAM:  2 GiB
Core:  176 devices, 23 uclasses, devicetree: separate
WDT:   Started watchdog at 30280000 with servicing (60s timeout)
MMC:   FSL_SDHC: 1, FSL_SDHC: 2
Loading Environment from MMC... OK
In:    serial at 30890000
Out:   serial at 30890000
Err:   serial at 30890000
SEC0:  RNG instantiated
Net:   eth0: ethernet at 30be0000
Hit any key to stop autoboot:  0
u-boot=>

One issue that I observed and haven't had a chance to debug yet is that
running 'ums 0 mmc 1' works only when issued for the first time.

If I interrupt with CRLC+C and then launch 'ums 0 mmc 1' again, it
does not work.

This is unrelated to SDP and happens when I boot from SD card as well.

If you have any ideas, please let me know.

Thanks,

Fabio Estevam