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Date: Thu, 1 Jul 2021 18:28:14 +0200
From: Stefan Brüns <stefan.bruens@...h-aachen.de>
To: Johan Hovold <johan@...nel.org>,
Bjørn Mork <bjorn@...k.no>
CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
Daniele Palmas <dnlplm@...il.com>
Subject: Re: [PATCH v2] USB: serial: qcserial: Support for SDX55 based Sierra Wireless 5G modules
On Donnerstag, 24. Juni 2021 13:15:07 CEST Bjørn Mork wrote:
> Johan Hovold <johan@...nel.org> writes:
> > Could you please also post the output of usb-devices (or lsusb -v) for
> > this device in MBIM mode?
>
> Yes, this would be nice to have.
See below.
> I suspect that this device is like other SDX55 devices we've seen, using
> class/subclass/function to map the vendor specific functions
> too. Dropping static interface numbers. If correct, then the patch is
> bogus and the interface numbers might change based on firmware version
> and configuration.
Do you really expect Sierra do to something sensible? According to their
documentation functions are matched by interface numbers.
They still use broken interface descriptors with holes in interface numbering
(i.e. interface number 2 does not exist, which violates the USB standard).
Regards, Stefan
lsusb -v -d 1199:
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.10
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x1199 Sierra Wireless, Inc.
idProduct 0x90d3
bcdDevice 0.06
iManufacturer 1 Sierra Wireless, Incorporated
iProduct 2 Sierra Wireless EM9191
iSerial 3 8W<nnnnnnnnnnnnn>
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x00a7
bNumInterfaces 4
bConfigurationValue 1
iConfiguration 4
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 500mA
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 0
bInterfaceCount 2
bFunctionClass 2 Communications
bFunctionSubClass 14
bFunctionProtocol 0
iFunction 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 14
bInterfaceProtocol 0
iInterface 0
CDC Header:
bcdCDC 1.10
CDC Union:
bMasterInterface 0
bSlaveInterface 1
CDC MBIM:
bcdMBIMVersion 1.00
wMaxControlMessage 4096
bNumberFilters 32
bMaxFilterSize 128
wMaxSegmentSize 2048
bmNetworkCapabilities 0x20
8-byte ntb input size
CDC MBIM Extended:
bcdMBIMExtendedVersion 1.00
bMaxOutstandingCommandMessages 64
wMTU 1500
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 9
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0
bInterfaceProtocol 2
iInterface 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 1
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0
bInterfaceProtocol 2
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x8e EP 14 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x0f EP 15 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
** UNRECOGNIZED: 05 24 00 10 01
** UNRECOGNIZED: 05 24 01 00 00
** UNRECOGNIZED: 04 24 02 02
** UNRECOGNIZED: 05 24 06 00 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x000a 1x 10 bytes
bInterval 9
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 0
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 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 4
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 48
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 0
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 0
--
Stefan Brüns / Bergstraße 21 / 52062 Aachen
home: +49 241 53809034 mobile: +49 151 50412019
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