On Thu, Jun 20, 2024 at 8:41 AM Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> > > On Thu, Jun 20, 2024 at 07:58:13AM +0200, Giacinto Cifelli wrote:
> > > > greetings,
> > > >
> > > > question:
> > > >
> > > > on a system (yocto), I have a usb composition that doesn't assign the
> > > > class for the interfaces:
> > > > |__ Port 3: Dev 3, If 10, Class=, Driver=cdc_mbim, 480M
> > > > |__ Port 3: Dev 3, If 8, Class=, Driver=cdc_acm, 480M
> > > > |__ Port 3: Dev 3, If 6, Class=, Driver=cdc_acm, 480M
> > > > |__ Port 3: Dev 3, If 4, Class=, Driver=cdc_acm, 480M
> > > > |__ Port 3: Dev 3, If 2, Class=, Driver=cdc_acm, 480M
> > > > |__ Port 3: Dev 3, If 11, Class=, Driver=cdc_mbim, 480M
> > > > |__ Port 3: Dev 3, If 0, Class=, Driver=cdc_acm, 480M
> > > > |__ Port 3: Dev 3, If 9, Class=, Driver=cdc_acm, 480M
> > > > |__ Port 3: Dev 3, If 7, Class=, Driver=cdc_acm, 480M
> > > > |__ Port 3: Dev 3, If 5, Class=, Driver=cdc_acm, 480M
> > > > |__ Port 3: Dev 3, If 3, Class=, Driver=cdc_acm, 480M
> > > > |__ Port 3: Dev 3, If 1, Class=, Driver=cdc_acm, 480M
> > > > Kernel: Linux version 6.1.35 (oe-user@oe-host) (x86_64-poky-linux-gcc
> > > > (GCC) 11.4.0, GNU ld (GNU Binutils) 2.38.20220708) #1 SMP
> > > > PREEMPT_DYNAMIC Thu Jun 22 18:03:13 UTC 2023
> > > >
> > > > instead of (arch):
> > > > |__ Port 004: Dev 004, If 0, Class=Communications, Driver=cdc_acm, 5000M
> > > > |__ Port 004: Dev 004, If 1, Class=CDC Data, Driver=cdc_acm, 5000M
> > > > |__ Port 004: Dev 004, If 2, Class=Communications, Driver=cdc_acm, 5000M
> > > > |__ Port 004: Dev 004, If 3, Class=CDC Data, Driver=cdc_acm, 5000M
> > > > |__ Port 004: Dev 004, If 4, Class=Communications, Driver=cdc_acm, 5000M
> > > > |__ Port 004: Dev 004, If 5, Class=CDC Data, Driver=cdc_acm, 5000M
> > > > |__ Port 004: Dev 004, If 6, Class=Communications, Driver=cdc_acm, 5000M
> > > > |__ Port 004: Dev 004, If 7, Class=CDC Data, Driver=cdc_acm, 5000M
> > > > |__ Port 004: Dev 004, If 8, Class=Communications, Driver=cdc_acm, 5000M
> > > > |__ Port 004: Dev 004, If 9, Class=CDC Data, Driver=cdc_acm, 5000M
> > > > |__ Port 004: Dev 004, If 10, Class=Communications, Driver=cdc_mbim, 5000M
> > > > |__ Port 004: Dev 004, If 11, Class=CDC Data, Driver=cdc_mbim, 5000M
> > > > Kernel: Linux 6.6.34-1-lts #1 SMP PREEMPT_DYNAMIC Sun, 16 Jun 2024
> > > > 14:45:31 +0000 x86_64 GNU/Linux
> > > >
> > > > This lack of class creates too many /dev/ttyACMx ports, and
> > > > ModemManager tries to access them all, perhaps also blocking the
> > > > device, and the whole system doesn't work.
> > > >
> > > > For completeness, the device is:
> > > > Bus 002 Device 004: ID 1e2d:0065 Gemalto M2M GmbH LTE Modem
> > > > which is supported without any customs in the cdc-acm and cdc_mbim drivers.
> > > >
> > > > I spotted only two options not compiled-in in the yocto .config
> > > > (compared with the arch one), but I strongly doubt this is related:
> > > > CONFIG_USB_G_MULTI
> > > > CONFIG_USB_G_MULTI_CDC
> > > >
> > > > Would you know why the class is not assigned?
> > >
> > > This is just a userspace issue, right?
> >
> > I think the class is assigned by the kernel/driver.
> >
> > > Or are you saying that somehow
> > > the same device plugged into two different systems works differently?
> >
> > correct: the same device works differently in the two systems... in
> > the sense of the class not assigned.
>
> It's not that it is not assigned, it's that something isn't figuring it
> out properly.
>
> Can you provide the output of 'lsusb -v -d 1e2d:0065' for both systems?
they seem ok with -v, I don't understand it.
yocto:
Bus 001 Device 003: ID 1e2d:0065 Cinterion LTE Modem
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 239
bDeviceSubClass 2
bDeviceProtocol 1
bMaxPacketSize0 64
idVendor 0x1e2d
idProduct 0x0065
bcdDevice 3.18
iManufacturer 1 Cinterion
iProduct 2 LTE Modem
iSerial 3 2de297b0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x01a9
bNumInterfaces 12
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 500mA
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 0
bInterfaceCount 2
bFunctionClass 2
bFunctionSubClass 2
bFunctionProtocol 1
iFunction 8 CDC Serial
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2
bInterfaceSubClass 2
bInterfaceProtocol 1
iInterface 6 CDC Abstract Control Model (ACM)
CDC Header:
bcdCDC 1.10
CDC Call Management:
bmCapabilities 0x00
bDataInterface 1
CDC ACM:
bmCapabilities 0x02
line coding and serial state
CDC Union:
bMasterInterface 0
bSlaveInterface 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 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 2
bInterfaceClass 10
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 7 CDC ACM Data
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 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 Association:
bLength 8
bDescriptorType 11
bFirstInterface 2
bInterfaceCount 2
bFunctionClass 2
bFunctionSubClass 2
bFunctionProtocol 1
iFunction 8 CDC Serial
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2
bInterfaceSubClass 2
bInterfaceProtocol 1
iInterface 6 CDC Abstract Control Model (ACM)
CDC Header:
bcdCDC 1.10
CDC Call Management:
bmCapabilities 0x00
bDataInterface 3
CDC ACM:
bmCapabilities 0x02
line coding and serial state
CDC Union:
bMasterInterface 2
bSlaveInterface 3
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 9
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 7 CDC ACM Data
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 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
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 4
bInterfaceCount 2
bFunctionClass 2
bFunctionSubClass 2
bFunctionProtocol 1
iFunction 8 CDC Serial
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 4
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2
bInterfaceSubClass 2
bInterfaceProtocol 1
iInterface 6 CDC Abstract Control Model (ACM)
CDC Header:
bcdCDC 1.10
CDC Call Management:
bmCapabilities 0x00
bDataInterface 5
CDC ACM:
bmCapabilities 0x02
line coding and serial state
CDC Union:
bMasterInterface 4
bSlaveInterface 5
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 9
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 5
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 7 CDC ACM Data
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 0
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 0
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 6
bInterfaceCount 2
bFunctionClass 2
bFunctionSubClass 2
bFunctionProtocol 1
iFunction 8 CDC Serial
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 6
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2
bInterfaceSubClass 2
bInterfaceProtocol 1
iInterface 6 CDC Abstract Control Model (ACM)
CDC Header:
bcdCDC 1.10
CDC Call Management:
bmCapabilities 0x00
bDataInterface 7
CDC ACM:
bmCapabilities 0x02
line coding and serial state
CDC Union:
bMasterInterface 6
bSlaveInterface 7
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x88 EP 8 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 7
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 7 CDC ACM Data
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 0
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 0
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 8
bInterfaceCount 2
bFunctionClass 2
bFunctionSubClass 2
bFunctionProtocol 1
iFunction 10 CDC Serial (DIAG)
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 8
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2
bInterfaceSubClass 2
bInterfaceProtocol 1
iInterface 11 CDC Abstract Control Model (ACM) for DIAG
CDC Header:
bcdCDC 1.10
CDC Call Management:
bmCapabilities 0x00
bDataInterface 0
CDC ACM:
bmCapabilities 0x00
CDC Union:
bMasterInterface 8
bSlaveInterface 9
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x8a EP 10 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 9
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 12 CDC ACM Data for DIAG
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x89 EP 9 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 0x05 EP 5 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 10
bInterfaceCount 2
bFunctionClass 2
bFunctionSubClass 14
bFunctionProtocol 0
iFunction 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 10
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2
bInterfaceSubClass 14
bInterfaceProtocol 0
iInterface 13 MBIM Control
CDC Header:
bcdCDC 1.10
CDC Union:
bMasterInterface 10
bSlaveInterface 11
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 0x8b EP 11 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 11
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 10
bInterfaceSubClass 0
bInterfaceProtocol 2
iInterface 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 11
bAlternateSetting 1
bNumEndpoints 2
bInterfaceClass 10
bInterfaceSubClass 0
bInterfaceProtocol 2
iInterface 14 MBIM Data
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
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 239
bDeviceSubClass 2
bDeviceProtocol 1
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0000
(Bus Powered)
arch:
Bus 002 Device 004: ID 1e2d:0065 Gemalto M2M GmbH LTE Modem
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 3.10
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 [unknown]
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 9
idVendor 0x1e2d Gemalto M2M GmbH
idProduct 0x0065 LTE Modem
bcdDevice 3.18
iManufacturer 1 Cinterion
iProduct 2 LTE Modem
iSerial 3 2de297b0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x0215
bNumInterfaces 12
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 896mA
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 0
bInterfaceCount 2
bFunctionClass 2 Communications
bFunctionSubClass 2 Abstract (modem)
bFunctionProtocol 1 AT-commands (v.25ter)
iFunction 8
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 6
CDC Header:
bcdCDC 1.10
CDC Call Management:
bmCapabilities 0x00
bDataInterface 1
CDC ACM:
bmCapabilities 0x02
line coding and serial state
CDC Union:
bMasterInterface 0
bSlaveInterface 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 9
bMaxBurst 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 [unknown]
bInterfaceProtocol 0
iInterface 7
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 0
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 2
bInterfaceCount 2
bFunctionClass 2 Communications
bFunctionSubClass 2 Abstract (modem)
bFunctionProtocol 1 AT-commands (v.25ter)
iFunction 8
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 2 Abstract (modem)
bInterfaceProtocol 1 AT-commands (v.25ter)
iInterface 6
CDC Header:
bcdCDC 1.10
CDC Call Management:
bmCapabilities 0x00
bDataInterface 3
CDC ACM:
bmCapabilities 0x02
line coding and serial state
CDC Union:
bMasterInterface 2
bSlaveInterface 3
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 9
bMaxBurst 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 [unknown]
bInterfaceProtocol 0
iInterface 7
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 0
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 4
bInterfaceCount 2
bFunctionClass 2 Communications
bFunctionSubClass 2 Abstract (modem)
bFunctionProtocol 1 AT-commands (v.25ter)
iFunction 8
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 4
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 2 Abstract (modem)
bInterfaceProtocol 1 AT-commands (v.25ter)
iInterface 6
CDC Header:
bcdCDC 1.10
CDC Call Management:
bmCapabilities 0x00
bDataInterface 5
CDC ACM:
bmCapabilities 0x02
line coding and serial state
CDC Union:
bMasterInterface 4
bSlaveInterface 5
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 9
bMaxBurst 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 5
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 [unknown]
bInterfaceProtocol 0
iInterface 7
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x85 EP 5 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 0
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 6
bInterfaceCount 2
bFunctionClass 2 Communications
bFunctionSubClass 2 Abstract (modem)
bFunctionProtocol 1 AT-commands (v.25ter)
iFunction 8
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 6
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 2 Abstract (modem)
bInterfaceProtocol 1 AT-commands (v.25ter)
iInterface 6
CDC Header:
bcdCDC 1.10
CDC Call Management:
bmCapabilities 0x00
bDataInterface 7
CDC ACM:
bmCapabilities 0x02
line coding and serial state
CDC Union:
bMasterInterface 6
bSlaveInterface 7
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x88 EP 8 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 9
bMaxBurst 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 7
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 [unknown]
bInterfaceProtocol 0
iInterface 7
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x87 EP 7 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x04 EP 4 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 0
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 8
bInterfaceCount 2
bFunctionClass 2 Communications
bFunctionSubClass 2 Abstract (modem)
bFunctionProtocol 1 AT-commands (v.25ter)
iFunction 10
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 8
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 2 Abstract (modem)
bInterfaceProtocol 1 AT-commands (v.25ter)
iInterface 11
CDC Header:
bcdCDC 1.10
CDC Call Management:
bmCapabilities 0x00
bDataInterface 0
CDC ACM:
bmCapabilities 0x00
CDC Union:
bMasterInterface 8
bSlaveInterface 9
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x8a EP 10 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 9
bMaxBurst 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 9
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 [unknown]
bInterfaceProtocol 0
iInterface 12
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x89 EP 9 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x05 EP 5 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 0
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 10
bInterfaceCount 2
bFunctionClass 2 Communications
bFunctionSubClass 14 [unknown]
bFunctionProtocol 0
iFunction 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 10
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 14 [unknown]
bInterfaceProtocol 0
iInterface 13
CDC Header:
bcdCDC 1.10
CDC Union:
bMasterInterface 10
bSlaveInterface 11
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 0x8b EP 11 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 9
bMaxBurst 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 11
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 [unknown]
bInterfaceProtocol 2
iInterface 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 11
bAlternateSetting 1
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 [unknown]
bInterfaceProtocol 2
iInterface 14
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x8e EP 14 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 2
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x0f EP 15 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 2
>
> > The device boots in the same way, the difference is not in the device.
>
> True, but this type of device has had a lot of quirks added to it for
> the cdc_ether driver for other ones by this vendor, but not for this
> specific device from what I can tell. So perhaps we got it right in
> newer kernels, but not older ones?
it was working in the 4.x series, and I never had issues since. I
think it is some compile option for yocto.
>
> thanks,
>
> greg k-h
