Re: USB 1.0/1.1 devices on modern machines with only EHCI/XHCI.

[Aleš Nesrsta]

Hi again,

probably did you mean SD card reader instead of smart card reader?

In this case:

1) SD card reader is PCI device, not USB device:
lspci
...
03:01.2 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro 
Host Adapter (rev 21) (prog-if 01)
...
AFAIK, it needs SDHCI PCI driver.

2) Similarly as smart card reader, SD reader is also usually not
recognized by BIOS (it is not possible to boot from this device - at
least on my notebook - but I did not check if there exists some BIOS 
settings which can enable another behavior).


BR,
Ales


> Hi,
> what do you mean exactly by "GRUB does not detect this device"?
> 1) Do you mean it is not listed by "usb" command?
> 2) Or do you mean it is not listed by "ls" command as disk?
>
> In the case 2) it is most probably caused by this: Such device is not
> mass storage class device. I.e., it probably needs some additional
> special driver.
> You can check this by lsusb -v
> Mass storage device should have something like this (important are
> values in last three rows):
> ...
>      Interface Descriptor:
>        bLength                 9
>        bDescriptorType         4
>        bInterfaceNumber        0
>        bAlternateSetting       0
>        bNumEndpoints           2
>        bInterfaceClass         8 Mass Storage
>        bInterfaceSubClass      6 SCSI
>        bInterfaceProtocol     80 Bulk-Only
> ...
>
> I have Dell Latitude E6500 - there is also smart card reader (connected
> directly to UHCI controller) and its interface descriptor unfortunately
> looks like this:
> ...
>      Interface Descriptor:
>        bLength                 9
>        bDescriptorType         4
>        bInterfaceNumber        0
>        bAlternateSetting       0
>        bNumEndpoints           3
>        bInterfaceClass       254 Application Specific Interface
>        bInterfaceSubClass      0
>        bInterfaceProtocol      0
> ...
>
> Additionally - this smart card reader device is (AFAIK) also usually not
> recognized by BIOS (it is not possible to boot from this device - at
> least on my notebook).
>
>
> BR,
> Ales
>
> Dne 29.8.2013 09:10, Melki Christian (consultant) napsal(a):
> > Hi,
> >
> > Is there a known problem with these devices in GRUB?
> >
> > I have a core i7 based Dell Latitude 6430 with an integrated broadcom
> > smart card reader. The devices looks like it is a USB 1.0/1.1 device,
> > probably sitting behind some hub to the EHCI-controller.
> >
> > As far as I can tell, this machine does not have a companion UHCI
> > controller at all.
> >
> > GRUB does not detect this device. I had a older machine with the same
> > broadcom smart card reader but sitting on a companion controller UHCI.
> > That worked just fine.
> >
> > Regards,
> >
> > Christian
> >
> >
> >
> > _______________________________________________
> > Grub-devel mailing list
> > address@hidden
> > https://lists.gnu.org/mailman/listinfo/grub-devel
>
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