On Mon, 2012-01-23 at 19:56 +0100, Bjørn Mork wrote:
> Dan Williams <dcbw@xxxxxxxxxx> writes:
>
> > So the Pantech UML290 has the following layout:
> >
> > 0 (2/2/1): CDC-ACM for AT commands
> > 1 (10/0/0): CDC-DATA for interface 0
> > 2 (ff/ff/ff): Qualcomm DIAG
> > 3 (ff/fd/ff): NMEA
> > 4 (ff/fe/ff): Pantech WMC
> > 5 (ff/f0/ff): RMNET/QMI port
>
> I assume this is after som modeswitch command? The same as the Windows
> driver uses? And you don't know if there are other options?
The UML290 does not require modeswitching at all.
> > Interface 5 is obviously the one we want here. And the WDM driver is
> > only looking for certain descriptors. Do we hack CDC-WDM and qmi_wwan
> > up for these types of devices?
>
>
> Interface 5 has three endpoints? Bulk in/out and interrupt in?
Yes, three endpoints like you describe.
> OK, this is where the fun begins. I knew there was some reason why I
> was struggling with the interface sharing... I guess we cannot expect
> every vendor to provide a "Linux mode" with two separate interfaces for
> the RMNET/QMI port.
>
> > Second, on Gobi devices, we have four USB interfaces, all FF/FF/FF.
> > Intf 0 and 2 have interrupt endpoints. One of them is a DIAG interface,
> > one is NMEA, and the other two are AT and RMNET/QMI.
>
> What kind of endpoints are on the RMNET/QMI interface?
see Elly's cleaned up Gobi driver here: http://lwn.net/Articles/439173/
as it has the logic to set everything up for Gobi devices. I expect
that it would work with the UML290 as well if things were hacked up a
bit. It should be pretty clear here how to talk to them.
In short we have:
0: (ff/ff/ff) (in/out/interrupt) - rmnet/QMI
1: (ff/ff/ff) (in/out) - DIAG
2: (ff/ff/ff) (in/out) - AT commands & PPP
3: (ff/ff/ff) (in/out/interrupt) - NMEA (?)
lsusb attached for both a Gobi 2K device and the UML290.
> If you have these devices, then it would be useful to verify that the
> cdc-wdm driver can be used to provide access to QMI without any further
> changes. This should in theory just work if you unload any other
> drivers binding to the RMNET/QMI interface, and bind cdc-wdm to it
> instead. This requires that you have the minimum buffer size patch
> installed, but should not require any other changes.
I tried that quickly but of course the WDM driver fails with EINVAL
because there are 3 endpoints on the RMNET/QMI interface (bulk
in/out/interrupt) instead of the 1 expected:
rv = -EINVAL;
iface = intf->cur_altsetting;
if (iface->desc.bNumEndpoints != 1)
goto err;
I briefly thought about hacking it to find the interrupt endpoing, but
if the cdc-wdm driver apparently only cares about 1 endpoint there's not
much point to handing it an interface with 3 I don't think...
> > I think so far the Huawei device is the only one that I've seen that
> > exposes descriptors that are quasi-CDC at all. How should we handle the
> > rest of these?
>
> Good question. Guess I'm going to see if I can make qmi_wwan and
> cdc-wdm share an interface after all.
Also you may not have seen, but the QUIC codeaurora people pushed a new
rmnet USB driver to their MSM kernel tree:
https://www.codeaurora.org/gitweb/quic/le/?p=kernel/msm.git;a=commit;h=37c35e4ee5226099374a1a1eda637d0f26fc023d
In the end, if the Huawei device mostly presents itself as WDM, and
other Gobi/MSM8xxx/MSM9xxx devices present themselves like Gobi cards
do, perhaps we should have separate drivers? Does it make sense to keep
hacking up CDC-WDM for devices that are clearly not exposed that way,
even if the internal operation would be similar? Also in the end they
are all just character devices to talk QMI so it doesn't really matter
what driver exposes that interface. It would be nice to share if we
can, but making too many changes to WDM probably isn't the right
approach either.
Dan
Bus 001 Device 005: ID 413c:8186 Dell Computer Corp. Gobi 2000 Wireless Modem
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x413c Dell Computer Corp.
idProduct 0x8186 Gobi 2000 Wireless Modem
bcdDevice 0.02
iManufacturer 3 Qualcomm Incorporated
iProduct 2 Dell Wireless 5620 (EV-DO-HSPA) Mobile Broadband Mini-Card
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 245
bNumInterfaces 4
bConfigurationValue 1
iConfiguration 1 Qualcomm Configuration
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 5
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 0
** UNRECOGNIZED: 05 24 00 10 01
** UNRECOGNIZED: 05 24 15 00 01
** UNRECOGNIZED: 05 24 06 01 01
** UNRECOGNIZED: 15 24 12 20 01 98 b0 6a 49 b0 9e 48 96 94 46 d9 9a 28 ca 4e 5d
** UNRECOGNIZED: 06 24 13 00 01 10
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 0
** UNRECOGNIZED: 05 24 00 10 01
** UNRECOGNIZED: 04 24 02 02
** UNRECOGNIZED: 05 24 01 03 02
** UNRECOGNIZED: 05 24 06 02 02
** UNRECOGNIZED: 15 24 12 20 01 98 b0 6a 49 b0 9e 48 96 94 46 d9 9a 28 ca 4e 5d
** UNRECOGNIZED: 06 24 13 00 01 10
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 5
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x85 EP 5 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 0
** UNRECOGNIZED: 05 24 00 10 01
** UNRECOGNIZED: 05 24 15 00 01
** UNRECOGNIZED: 05 24 06 03 03
** UNRECOGNIZED: 15 24 12 20 01 98 b0 6a 49 b0 9e 48 96 94 46 d9 9a 28 ca 4e 5d
** UNRECOGNIZED: 06 24 13 00 01 30
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x86 EP 6 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x04 EP 4 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0001
Self Powered
Bus 002 Device 028: ID 106c:3718 Curitel Communications, Inc.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 2 Communications
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x106c Curitel Communications, Inc.
idProduct 0x3718
bcdDevice 0.00
iManufacturer 3 Pantech, Incorporated
iProduct 2 PANTECH UML290
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 166
bNumInterfaces 6
bConfigurationValue 1
iConfiguration 1 Pantech, Incorporated
bmAttributes 0xc0
Self Powered
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 2 Abstract (modem)
bInterfaceProtocol 1 AT-commands (v.25ter)
iInterface 0
CDC Header:
bcdCDC 1.10
CDC ACM:
bmCapabilities 0x02
line coding and serial state
CDC Call Management:
bmCapabilities 0x03
call management
use DataInterface
bDataInterface 1
CDC Union:
bMasterInterface 0
bSlaveInterface 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 5
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 253
bInterfaceProtocol 255
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 4
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 254
bInterfaceProtocol 255
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x85 EP 5 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x04 EP 4 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 5
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 240
bInterfaceProtocol 255
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x86 EP 6 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 5
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x87 EP 7 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x05 EP 5 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 32
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 2 Communications
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0000
(Bus Powered)
