[Arm-netbook] Allwinner 2.6.36 kernel and poor USB performance

[Guo, Yifu]

I'll look in to it this weekend
On Apr 6, 2012 11:12 AM, "nikk gitanes" <tsynik at gmail.com> wrote:

> Hi, I'm working on Allwinner A10 Android 2.3 tablet connected with many
> USB devices,
> and found very poor USB performance on 2.6.36 kernel.
>
> My device have only one OTG port, so I attach self-powered USB Hub to it.
>
> Connected USB devices are: USB DAC, PL2303 based GPS, DVB-T Tuner,
> Bluetooth stick, 3G Modem.
>
> I have no major issues with soundcard and dvb, all other devices also work
> fine alone, BUT
> when 3G or BT device have activity (for example, I enable bluetooth, or
> plug 3G modem and it establishing 3G connection),
> sound, transferred to USB DAC, goes choppy, and not listenable at all.
>
> After some debugging (thanks dmesg), I realise that it's all related to
> allwinners' USB host driver.
>
> ...
> <7>[  597.740000]       [ fire_audio_urb : 216 ]
> <6>[  597.750000]
> WRN:L2286(drivers/usb/sun4i_usb/hcd/core/sw_hcd_host.c):ERR:
> sw_hcd_host_rx, end 1 RX proto error(0x4)
> <6>[  597.760000]
> WRN:L2286(drivers/usb/sun4i_usb/hcd/core/sw_hcd_host.c):ERR:
> sw_hcd_host_rx, end 1 RX proto error(0x4)
> <6>[  597.770000]
> WRN:L2286(drivers/usb/sun4i_usb/hcd/core/sw_hcd_host.c):ERR:
> sw_hcd_host_rx, end 1 RX proto error(0x4)
> <7>[  608.940000]       [ fire_audio_urb : 216 ]
>
> DVB doesn't work also, if connected to 2nd usb hub, connected to 1st one:
>
> ...
> <7>[  396.040000]       [ fire_audio_urb : 216 ]
> <6>[  407.140000]
> WRN:L3142(drivers/usb/sun4i_usb/hcd/core/sw_hcd_host.c):ERR: not support
> type(1)
> <6>[  407.140000]
> WRN:L3142(drivers/usb/sun4i_usb/hcd/core/sw_hcd_host.c):ERR: not support
> type(1)
> <6>[  407.140000]
> WRN:L3142(drivers/usb/sun4i_usb/hcd/core/sw_hcd_host.c):ERR: not support
> type(1)
> <6>[  407.150000]
> WRN:L1867(drivers/usb/sun4i_usb/hcd/core/sw_hcd_host.c):ERR:
> sw_hcd_host_tx, urb is NULL
> <7>[  407.180000]       [ fire_audio_urb : 216 ]
>
> There are many other errors from sw_hcd_host.c in various conditions.
>
> Does this mean driver is incomplete? Do you have issues with USB devices
> on your hardware?
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