[Arm-netbook] allwinner USB HOST errors

[nikk gitanes]

10.05.2012, в 11:52, Henrik Nordström написал(а):

> tor 2012-05-10 klockan 11:33 +0400 skrev nikk gitanes:
> 
>> Yes, Henrik. There is only OTG port on Ainol NOVO7 Advanced. Didn't find any testpoints on PCB for other
>> USB ports inside (
> 
> Ok, so using a 3G dongle is a true mess then needing adapter cable.
> 
> Why do they omit the USB host port(s) on devices like this? There is
> plenty of space to fit one, and the only components needed is connector
> + 2 channel (per port) ESD protection. It's odd, considering the Novo
> A10 product range is not targeting the ultra-low budget tablet.
> 

True. Even more odd thing is any 3G modem in tablet OTG port flooding dmesg with NAK timeout messages
from host driver, so it's suffering during 3G operation. I need to comment line 2300 in sw_hcd_host.c:

DMSG_PANIC("ERR: sw_hcd_host_rx, RX end %d NAK timeout(0x%x)\n", epnum, rx_csr);

			/* NOTE: NAKing is *NOT* an error, so we want to
			 * continue.  Except ... if there's a request for
			 * another QH, use that instead of starving it.
			 *
			 * Devices like Ethernet and serial adapters keep
			 * reads posted at all times, which will starve
			 * other devices without this logic.

to solve this.