Larry Battraw wrote:
On 1/16/07, Frantisek Dufka wrote:
Seems to be 2.0, capable of high speed mode (480MBits), chip is TUSB6010
by TI. No usb host mode is compiled in the kernel. Usb host mode support
was also removed from initfs (usb booting) so this may look bad.
Looking at the "shiny brochure"-level documentation for the TUSB6010
it looks like it has full support for USB-OTG, including a 5V charge
pump for driving peripheral devices. Whether or not it's possible to
write support for it due to available documentation is another matter.
Looks like the support is written in the kernel but simply disabled. I'm
not familiar with USB to such detail but I guess the problem may be
whether it is wired in n800 to support OTG mode. Kernel configuration
looks like this:
| |< > Support for Host-side USB
|
| |<*> Inventra Highspeed Dual Role Controller (TI, ...)
|
| |[*] TUSB 6010 support
|
| |[*] TUSB 6010 loopback test support
The 'Inventra Highspeed Dual Role Controller' help says
"Say Y here if your system has a dual role high speed USB
controller based on the Mentor Graphics silicon IP. Then
configure options to match your silicon and the board
it's being used with, including the USB peripheral role,
or the USB host role, or both."
Host-side usb disabled means that host side support for Inventra
Highspeed Dual Role Controller and all the usb peripherial drivers are
not built.
So either OTG mode is not possible due to HW in n800 or Nokia has no use
for it so they made the kernel smaller.
Frantisek
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