Hi all,
I have a T40 with an Intel 82801DB:
00:1d.0 USB Controller: Intel Corp. 82801DB USB (Hub #1) (rev 01)
00:1d.1 USB Controller: Intel Corp. 82801DB USB (Hub #2) (rev 01)
00:1d.2 USB Controller: Intel Corp. 82801DB USB (Hub #3) (rev 01)
00:1d.7 USB Controller: Intel Corp. 82801DB USB EHCI Controller (rev 01)
When I plug things into my USB ports, they always show up on the uhci
hub (#1-3), not the ehci hub, and only give me full-speed, not high-speed.
Both hubs are in my usbtree:
[EMAIL PROTECTED]:~$ ./usbtree
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=uhci-hcd/2p, 12M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=uhci-hcd/2p, 12M
|__ Port 1: Dev 2, If 0, Class=HID, Driver=hid, 1.5M
|__ Port 2: Dev 3, If 0, Class=stor., Driver=none, 12M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=uhci-hcd/2p, 12M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=Corp./6p, 480M
I looked into this a bit. Here's what the kernel says when I plug in a
USB2 device:
Jul 5 13:54:22 fermat kernel: hub 1-0:0: debounce: port 3: delay 100ms
stable 4 status 0x501
Looks good, it has USB_PORT_STAT_HIGH_SPEED | USB_PORT_STAT_POWER |
USB_PORT_STAT_CONNECTION.
But it fails to follow up on this good news by actually attaching the
device to hub1 (the high speed hub).
By inserting print statements, I tracked the execution through to
hub_port_reset, which always returns status 1, 'device disconnected'.
Weird. When hub_port_reset calls hub_port_wait_reset, we get the
following iterations through the loop:
Jul 5 13:45:45 fermat kernel: hub 1-0:0: plam: hub_port_wait_reset got
portstatus 0x511
Jul 5 13:45:45 fermat kernel: hub 1-0:0: plam: hub_port_wait_reset got
portstatus 0x511
Jul 5 13:45:45 fermat kernel: hub 1-0:0: plam: hub_port_wait_reset got
portstatus 0x511
Jul 5 13:45:45 fermat kernel: hub 1-0:0: plam: hub_port_wait_reset got
portstatus 0x0
Jul 5 13:45:45 fermat kernel: hub 1-0:0: plam: hub_port_wait_reset got
portstatus 0x0
>From the code, it looks like portstatus should not go to 0. It should,
instead, go to !USB_PORT_STAT_RESET & USB_PORT_STAT_ENABLE, which would
be 0x503 or something like that.
Does anyone have any ideas as to what might be happening?
I haven't seen any reports of anyone successfully using USB2 on this
particular controller. I don't know enough about Windows to find out if
it properly initializes USB2 devices.
pat
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