From: Lars Melin <larsm17@gmail.com>
To: Svyatoslav Ryhel <clamor95@gmail.com>
Cc: Oliver Neukum <oneukum@suse.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 1/1] usb: csc-acm: add Infineon/Comneon modem support (1519:0020)
Date: Tue, 27 Jan 2026 08:12:15 +0700 [thread overview]
Message-ID: <8794178c-0522-4532-b21e-3904f90619f6@gmail.com> (raw)
In-Reply-To: <CAPVz0n1x9gWC0XzC0VQ=syT3LAm_5xof-_T5=8TzKapBQheVjw@mail.gmail.com>
On 2026-01-26 21:55, Svyatoslav Ryhel wrote:
/snip
>
> Bus 001 Device 002: ID 1519:0020 Comneon HSIC Device
> Couldn't open device, some information will be missing
> Negotiated speed: High Speed (480Mbps)
> Device Descriptor:
> bLength 18
> bDescriptorType 1
> bcdUSB 2.00
> bDeviceClass 2 [unknown]
> bDeviceSubClass 0 [unknown]
> bDeviceProtocol 0
> bMaxPacketSize0 64
> idVendor 0x1519 Comneon
> idProduct 0x0020 HSIC Device
> bcdDevice 12.74
> iManufacturer 1 Comneon
> iProduct 2 HSIC Device
> iSerial 3 0123456789
> bNumConfigurations 1
> Configuration Descriptor:
> bLength 9
> bDescriptorType 2
> wTotalLength 0x0111
> bNumInterfaces 8
> bConfigurationValue 1
> iConfiguration 0
> bmAttributes 0xc0
> Self Powered
> MaxPower 100mA
> Interface Association:
> bLength 8
> bDescriptorType 11
> bFirstInterface 0
> bInterfaceCount 2
> bFunctionClass 2 [unknown]
> bFunctionSubClass 2 [unknown]
> bFunctionProtocol 1
> iFunction 0
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 0
> bAlternateSetting 0
> bNumEndpoints 1
> bInterfaceClass 2 [unknown]
> bInterfaceSubClass 2 [unknown]
> bInterfaceProtocol 1
> iInterface 4
> CDC Header:
> bcdCDC 1.10
> CDC Union:
> bMasterInterface 0
> bSlaveInterface 1
> CDC Call Management:
> bmCapabilities 0x00
> bDataInterface 1
> CDC ACM:
> bmCapabilities 0x07
> sends break
> line coding and serial state
> get/set/clear comm features
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x85 EP 5 IN
> bmAttributes 3
> Transfer Type Interrupt
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0040 1x 64 bytes
> bInterval 4
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 1
> bAlternateSetting 0
> bNumEndpoints 2
> bInterfaceClass 10 [unknown]
> bInterfaceSubClass 0 [unknown]
> bInterfaceProtocol 0
> iInterface 5
> 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 [unknown]
> bFunctionSubClass 2 [unknown]
> bFunctionProtocol 1
> iFunction 0
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 2
> bAlternateSetting 0
> bNumEndpoints 1
> bInterfaceClass 2 [unknown]
> bInterfaceSubClass 2 [unknown]
> bInterfaceProtocol 1
> iInterface 6
> CDC Header:
> bcdCDC 1.10
> CDC Union:
> bMasterInterface 2
> bSlaveInterface 3
> CDC Call Management:
> bmCapabilities 0x00
> bDataInterface 3
> CDC ACM:
> bmCapabilities 0x07
> sends break
> line coding and serial state
> get/set/clear comm features
> 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 4
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 3
> bAlternateSetting 0
> bNumEndpoints 2
> bInterfaceClass 10 [unknown]
> bInterfaceSubClass 0 [unknown]
> bInterfaceProtocol 0
> iInterface 7
> 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 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 [unknown]
> bFunctionSubClass 2 [unknown]
> bFunctionProtocol 1
> iFunction 0
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 4
> bAlternateSetting 0
> bNumEndpoints 1
> bInterfaceClass 2 [unknown]
> bInterfaceSubClass 2 [unknown]
> bInterfaceProtocol 1
> iInterface 8
> CDC Header:
> bcdCDC 1.10
> CDC Union:
> bMasterInterface 4
> bSlaveInterface 5
> CDC Call Management:
> bmCapabilities 0x00
> bDataInterface 5
> CDC ACM:
> bmCapabilities 0x07
> sends break
> line coding and serial state
> get/set/clear comm features
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x87 EP 7 IN
> bmAttributes 3
> Transfer Type Interrupt
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0040 1x 64 bytes
> bInterval 4
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 5
> bAlternateSetting 0
> bNumEndpoints 2
> bInterfaceClass 10 [unknown]
> bInterfaceSubClass 0 [unknown]
> bInterfaceProtocol 0
> iInterface 9
> 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 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 [unknown]
> bFunctionSubClass 2 [unknown]
> bFunctionProtocol 1
> iFunction 0
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 6
> bAlternateSetting 0
> bNumEndpoints 1
> bInterfaceClass 2 [unknown]
> bInterfaceSubClass 2 [unknown]
> bInterfaceProtocol 1
> iInterface 10
> CDC Header:
> bcdCDC 1.10
> CDC Union:
> bMasterInterface 6
> bSlaveInterface 7
> CDC Call Management:
> bmCapabilities 0x00
> bDataInterface 7
> CDC ACM:
> bmCapabilities 0x07
> sends break
> line coding and serial state
> get/set/clear comm features
> 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 4
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 7
> bAlternateSetting 0
> bNumEndpoints 2
> bInterfaceClass 10 [unknown]
> bInterfaceSubClass 0 [unknown]
> bInterfaceProtocol 0
> iInterface 11
> 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 0x04 EP 4 OUT
> bmAttributes 2
> Transfer Type Bulk
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0200 1x 512 bytes
> bInterval 0
>
Hi,
I can't see anything wrong with the union descriptor in your listing.
What is your reason for adding this device to cdc-acm?
thanks
Lars
next prev parent reply other threads:[~2026-01-27 1:12 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-22 15:17 [PATCH v1 0/1] usb: csc-acm: add Infineon/Comneon modem support Svyatoslav Ryhel
2026-01-22 15:17 ` [PATCH v1 1/1] usb: csc-acm: add Infineon/Comneon modem support (1519:0020) Svyatoslav Ryhel
2026-01-22 15:58 ` Lars Melin
2026-01-22 16:17 ` Svyatoslav Ryhel
2026-01-26 13:51 ` Lars Melin
2026-01-26 14:55 ` Svyatoslav Ryhel
2026-01-27 1:12 ` Lars Melin [this message]
2026-01-27 6:50 ` Svyatoslav Ryhel
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