[U-Boot] DFU to MMC #1

[Lukasz Majewski]

Hi Tamás,

> Hi Lukasz,
> 
> I'm not sure what to check. Could you specify it more exactly? I'm 
> quite sure that on the BeagleBone Black MMC0 is the SD card and MMC1
> is the eMMC.
> 
> I'm not familiar with the U-Boot source code, but what I was trying
> to point out is that the <dev> parameter from the dfu command might
> be ignored by the writing routine:
> 
> 1) This is the usage of the dfu command:
> 
> dfu <USB_controller> <interface> <dev> [list]
> 
> 2) So, this command should write to MMC1:
> 
> U-Boot# dfu 0 mmc 1

This is strange since the "1" here specify the mmc device.

Could you type when SD and eMMC is inserted:
"mmc list" and then

"mmc part"
mmc dev 1
"mmc part"
mmc dev 0

and paste the output?

As fair as I noticed on my board (TRATS2):
MMC0 is eMMC and MMC2 = SD.

On beagle bone black it is the opposite:
MMC0 is SD and MMC1 is eMMC.


> 
> 3) But the output of the command above indicates writing to MMC0:
> 
> MMC write: dev # 0, block # 63, count 762 ... 762 blocks write: OK
> 
> In accordance to the message above the SD card (MMC0) was
> overwritten. Let me know how I can help to sort this out.
> 
> Thanks,
> -Tamás
> 
> On 2014-08-18 15:53, Lukasz Majewski wrote:
> > Hi Tamás,
> > 
> >> Dear All,
> >> 
> >> I'm trying to do a firmware update on my BeagleBone Black using DFU
> >> and nearly getting there:
> >> 
> >> 
> >> U-Boot# dfu 0 mmc 1
> >> GADGET DRIVER: usb_dnl_dfu
> >> musb-hdrc: peripheral reset irq lost!
> >> 
> >> MMC write: dev # 0, block # 63, count 762 ... 762 blocks write: OK
> >> #
> >> DFU complete CRC32: 0xee7826ec
> >> DOWNLOAD ... OK
> >> Ctrl+C to exit ...
> >> U-Boot#
> >> 
> >> 
> >> However, the problem is that I'm trying to write to MMC #1 (eMMC),
> >> but U-Boot updates MMC #0 (SD card) as it can be seen from the
> >> output above.
> >> 
> >> Is this a bug in U-Boot or I am doing something wrong?
> >> 
> >> I'm using U-Boot version: u-boot-2013.10-ti2013.12.01 (from TI
> >> Sitara SDK 07).
> >> 
> > 
> > It is strange. I will look into this tomorrow.
> > 
> > BTW: Are you sure that the mmc dev points to correct mmc device?
> > Could you check this for me?
> > 
> >> Thanks,
> >> -Tamás
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-- 
Best regards,

Lukasz Majewski

Samsung R&D Institute Poland (SRPOL) | Linux Platform Group