* linux-3.2.12: uvcvideo: ** UNRECOGNIZED: 24 ff 42 49 53 54 00 01 05 02 10 00 00 00 00 00 01 06 b8 0b 02 07 b8 0b 03 08 b8 0b 04 09 4e 20 05 0a b8 0b
@ 2012-03-31 15:07 Martin Mokrejs
2012-04-02 9:17 ` Laurent Pinchart
0 siblings, 1 reply; 2+ messages in thread
From: Martin Mokrejs @ 2012-03-31 15:07 UTC (permalink / raw)
To: linux-uvc-devel, linux-media, laurent.pinchart
Hi,
when inspecting "lsusb -v" output I came across this UNRECOGNIZED message. Anything to worry about?
Bus 001 Device 003: ID 05ca:1820 Ricoh Co., Ltd
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 ?
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
idVendor 0x05ca Ricoh Co., Ltd
idProduct 0x1820
bcdDevice c.27
iManufacturer 1 CN01MWM9724871A4KB28A00
iProduct 2 Laptop_Integrated_Webcam_FHD
[cut]
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 13
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x1400 3x 1024 bytes
bInterval 1
** UNRECOGNIZED: 24 ff 42 49 53 54 00 01 05 02 10 00 00 00 00 00 01 06 b8 0b 02 07 b8 0b 03 08 b8 0b 04 09 4e 20 05 0a b8 0b
It is about the uvcvideo driver I think. The camera works, at least in skype
so probably I should not bother you asking this question at all. ;-)
usb 1-1.5: new high-speed USB device number 3 using ehci_hcd
usb 1-1.5: skipped 1 descriptor after configuration
usb 1-1.5: skipped 6 descriptors after interface
usb 1-1.5: skipped 1 descriptor after endpoint
usb 1-1.5: skipped 19 descriptors after interface
usb 1-1.5: skipped 1 descriptor after endpoint
usb 1-1.5: default language 0x0409
usb 1-1.5: udev 3, busnum 1, minor = 2
usb 1-1.5: New USB device found, idVendor=05ca, idProduct=1820
usb 1-1.5: New USB device strings: Mfr=1, Product=2, SerialNumber=0
usb 1-1.5: Product: Laptop_Integrated_Webcam_FHD
usb 1-1.5: Manufacturer: CN01MWM9724871A4KB28A00
usb 1-1.5: usb_probe_device
usb 1-1.5: configuration #1 chosen from 1 choice
usb 1-1.5: adding 1-1.5:1.0 (config #1, interface 0)
uvcvideo 1-1.5:1.0: usb_probe_interface
uvcvideo 1-1.5:1.0: usb_probe_interface - got id
uvcvideo: Found UVC 1.00 device Laptop_Integrated_Webcam_FHD (05ca:1820)
input: Laptop_Integrated_Webcam_FHD as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.5/1-1.5:1.0/input/input8
usb 1-1.5: adding 1-1.5:1.1 (config #1, interface 1)
Thanks,
Martin
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: linux-3.2.12: uvcvideo: ** UNRECOGNIZED: 24 ff 42 49 53 54 00 01 05 02 10 00 00 00 00 00 01 06 b8 0b 02 07 b8 0b 03 08 b8 0b 04 09 4e 20 05 0a b8 0b
2012-03-31 15:07 linux-3.2.12: uvcvideo: ** UNRECOGNIZED: 24 ff 42 49 53 54 00 01 05 02 10 00 00 00 00 00 01 06 b8 0b 02 07 b8 0b 03 08 b8 0b 04 09 4e 20 05 0a b8 0b Martin Mokrejs
@ 2012-04-02 9:17 ` Laurent Pinchart
0 siblings, 0 replies; 2+ messages in thread
From: Laurent Pinchart @ 2012-04-02 9:17 UTC (permalink / raw)
To: Martin Mokrejs, linux-media
Hi Martin,
On Saturday 31 March 2012 17:07:22 Martin Mokrejs wrote:
> Hi,
> when inspecting "lsusb -v" output I came across this UNRECOGNIZED message.
> Anything to worry about?
>
> Bus 001 Device 003: ID 05ca:1820 Ricoh Co., Ltd
> Device Descriptor:
> bLength 18
> bDescriptorType 1
> bcdUSB 2.00
> bDeviceClass 239 Miscellaneous Device
> bDeviceSubClass 2 ?
> bDeviceProtocol 1 Interface Association
> bMaxPacketSize0 64
> idVendor 0x05ca Ricoh Co., Ltd
> idProduct 0x1820
> bcdDevice c.27
> iManufacturer 1 CN01MWM9724871A4KB28A00
> iProduct 2 Laptop_Integrated_Webcam_FHD
> [cut]
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 1
> bAlternateSetting 13
> bNumEndpoints 1
> bInterfaceClass 14 Video
> bInterfaceSubClass 2 Video Streaming
> bInterfaceProtocol 0
> iInterface 0
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x82 EP 2 IN
> bmAttributes 5
> Transfer Type Isochronous
> Synch Type Asynchronous
> Usage Type Data
> wMaxPacketSize 0x1400 3x 1024 bytes
> bInterval 1
> ** UNRECOGNIZED: 24 ff 42 49 53 54 00 01 05 02 10 00 00 00 00 00 01
> 06 b8 0b 02 07 b8 0b 03 08 b8 0b 04 09 4e 20 05 0a b8 0b
That's a vendor-specific descriptor, as reported by the second byte being
0xff. Vendor-specific descriptors are not standard (and very often not
documented), so lsusb doesn't know how to decode it. The uvcvideo driver
happily ignores it completely.
Such descriptors are used for various purposes, often to add proprietary
extensions to the device. In this case, as the next 4 bytes decode to 'BIST'
(most likely Built-In Self Test) in ASCII, I expect the descriptor to be used
for production and QA purpose.
> It is about the uvcvideo driver I think. The camera works, at least in skype
> so probably I should not bother you asking this question at all. ;-)
Getting a better understanding of Linux is always worth a question :-)
> usb 1-1.5: new high-speed USB device number 3 using ehci_hcd
> usb 1-1.5: skipped 1 descriptor after configuration
> usb 1-1.5: skipped 6 descriptors after interface
> usb 1-1.5: skipped 1 descriptor after endpoint
> usb 1-1.5: skipped 19 descriptors after interface
> usb 1-1.5: skipped 1 descriptor after endpoint
> usb 1-1.5: default language 0x0409
> usb 1-1.5: udev 3, busnum 1, minor = 2
> usb 1-1.5: New USB device found, idVendor=05ca, idProduct=1820
> usb 1-1.5: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> usb 1-1.5: Product: Laptop_Integrated_Webcam_FHD
> usb 1-1.5: Manufacturer: CN01MWM9724871A4KB28A00
> usb 1-1.5: usb_probe_device
> usb 1-1.5: configuration #1 chosen from 1 choice
> usb 1-1.5: adding 1-1.5:1.0 (config #1, interface 0)
> uvcvideo 1-1.5:1.0: usb_probe_interface
> uvcvideo 1-1.5:1.0: usb_probe_interface - got id
> uvcvideo: Found UVC 1.00 device Laptop_Integrated_Webcam_FHD (05ca:1820)
> input: Laptop_Integrated_Webcam_FHD as
> /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.5/1-1.5:1.0/input/input8 usb
> 1-1.5: adding 1-1.5:1.1 (config #1, interface 1)
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 2+ messages in thread
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2012-03-31 15:07 linux-3.2.12: uvcvideo: ** UNRECOGNIZED: 24 ff 42 49 53 54 00 01 05 02 10 00 00 00 00 00 01 06 b8 0b 02 07 b8 0b 03 08 b8 0b 04 09 4e 20 05 0a b8 0b Martin Mokrejs
2012-04-02 9:17 ` Laurent Pinchart
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