OTG102
The page is to describe and provide information for a device called EZgrabber2 which appears to be produced Mygica and Geniatech.
Overview/Features
The EZGrabber2 device shares the Windows drivers for the similar devices Capit and EZGrabber, so likely much of the information will be in common with those. Please clarify if you have any of these products:
| Device | Product url(s) | USB ID | Chipset |
|---|---|---|---|
| EZGrabber2 | Mygica and Geniatech | 1f4d:0102
0572:58a3 (not verified, see below) |
CX78921-11z, compatible with cx231xx Linux framework |
| EZGrabber | My Gica EZGrabber | ? | ? |
| Capit | MyGica Capit MyGica Capit Old site Geniatech | ? | ? |
Supposedly supports output of compressed MPEG1/2/4 stream(on Windows). On Linux, using a patched cx231xx driver, it is at least possible to get uncompressed YUV4:2:2 video and 48000Hz stereo through the corresponding alsa device.
It has the standard USB 2.0 interface with stereo, composite video and S-video inputs.
Components Used
The single chip on the board is labeled as CX78921-11z. There is no reference to this chip on Conexant's website nor practically any the entire internet, so likely this is just a renumbered chip for these specific vendors. However the indication that it can output compressed MPEG4 video does suggest that it is not a standard cx23100/1/2.
However examining the Windows drivers provided by the vendors, they refer to the device Polaris.CVBS or POLARIS.OTG102, and contain many of the same driver files as other devices containing the cx23100/1/2 chips .
Images
Making it work
We need to add the device definition and some related details to the cx231xx driver and have installed the appropriate firmware (see below). Once the module is built and installed, the cx231xx module should autoload on detecting the device. If not, it can be manually loaded (#modprobe cx231xx).
When/if the hardware encoding is ever functioning, the cx25840 module seems to be also needed, however it wouldn't autoload in my experimentation. Thus load the kernel modules for cx25840 and cx231xx before plugging in the device (#modprobe cx25840;modprobe cx231xx). If I don't do this, the cx231xx module will autoload on detecting the device, but the cx25840 module will not autoload, and the device doesn't function at all. Doing this and using the below patch but with the .had_417=1 uncommented, two video device nodes are created, /dev/video0 and /dev/video1. video0 would be for compressed video, but nothing comes out of it. video1 becomes the uncompressed video output. Without the .has_417=1 defined in the driver, only /dev/video0 is created and is the uncompressed video.
The following is a patch against a kernel source 3.6. It should be fairly applicable to sources from 2.6.32 on through 3.7, with the possible note of the device number in cx2311.h. Note that in 3.8 and presumably onwards, the structure of the drivers/media/ directory has been changed and no longer is there a drivers/media/video directory, but rather the video drivers are regrouped by interface (usb, pci), so the cx231xx drivers are under drivers/media/usb/cx231xx while the related and also needed driver for the cx25840 is under drivers/media/pci/.
The has also been a lot of recent (early 2013) patches submitted to patchwork.kernel.org/project/linux-media that may require subsequent modifications. A patch for this device has been submitted and will hopefully be pulled into to 3.9 or following kernel.
Kernel Patch
diff -uprN linux-3.6/drivers/media/video/cx231xx/cx231xx-avcore.c linux-3.6.new/drivers/media/video/cx231xx/cx231xx-avcore.c
--- linux-3.6/drivers/media/video/cx231xx/cx231xx-avcore.c 2012-09-30 17:47:46.000000000 -0600
+++ linux-3.6.new/drivers/media/video/cx231xx/cx231xx-avcore.c 2013-02-26 19:58:51.096793077 -0700
@@ -352,6 +352,7 @@ int cx231xx_afe_update_power_control(str
case CX231XX_BOARD_CNXT_RDE_253S:
case CX231XX_BOARD_CNXT_RDU_253S:
case CX231XX_BOARD_CNXT_VIDEO_GRABBER:
+ case CX231XX_BOARD_OTG102:
case CX231XX_BOARD_HAUPPAUGE_EXETER:
case CX231XX_BOARD_HAUPPAUGE_USBLIVE2:
case CX231XX_BOARD_PV_PLAYTV_USB_HYBRID:
@@ -1719,6 +1720,7 @@ int cx231xx_dif_set_standard(struct cx23
case CX231XX_BOARD_CNXT_SHELBY:
case CX231XX_BOARD_CNXT_RDU_250:
case CX231XX_BOARD_CNXT_VIDEO_GRABBER:
+ case CX231XX_BOARD_OTG102:
case CX231XX_BOARD_HAUPPAUGE_EXETER:
func_mode = 0x03;
break;
diff -uprN linux-3.6/drivers/media/video/cx231xx/cx231xx-cards.c linux-3.6.new/drivers/media/video/cx231xx/cx231xx-cards.c
--- linux-3.6/drivers/media/video/cx231xx/cx231xx-cards.c 2012-09-30 17:47:46.000000000 -0600
+++ linux-3.6.new/drivers/media/video/cx231xx/cx231xx-cards.c 2013-02-28 12:23:58.925869674 -0700
@@ -280,6 +280,37 @@ struct cx231xx_board cx231xx_boards[] =
}
},
},
+ [CX231XX_BOARD_OTG102] = {
+ .name = "Geniatech OTG102",
+ .tuner_type = TUNER_ABSENT,
+ .decoder = CX231XX_AVDECODER,
+ .output_mode = OUT_MODE_VIP11,
+ .ctl_pin_status_mask = 0xFFFFFFC4,
+ .agc_analog_digital_select_gpio = 0x0c, /* According with PV CxPlrCAP.inf file */
+ .gpio_pin_status_mask = 0x4001000,
+ .norm = V4L2_STD_NTSC,
+ .no_alt_vanc = 1,
+ .external_av = 1,
+ .dont_use_port_3 = 1,
+ /*.has_417 = 1, */
+ /* This board is believed to have a hardware encoding chip
+ * supporting mpeg1/2/4, but as the 417 is apparently not
+ * working for the reference board it is not here either. */
+
+ .input = {{
+ .type = CX231XX_VMUX_COMPOSITE1,
+ .vmux = CX231XX_VIN_2_1,
+ .amux = CX231XX_AMUX_LINE_IN,
+ .gpio = NULL,
+ }, {
+ .type = CX231XX_VMUX_SVIDEO,
+ .vmux = CX231XX_VIN_1_1 |
+ (CX231XX_VIN_1_2 << 8) |
+ CX25840_SVIDEO_ON,
+ .amux = CX231XX_AMUX_LINE_IN,
+ .gpio = NULL,
+ }
+ },
+ },
[CX231XX_BOARD_CNXT_RDE_250] = {
.name = "Conexant Hybrid TV - rde 250",
.tuner_type = TUNER_XC5000,
@@ -620,6 +651,8 @@ struct usb_device_id cx231xx_id_table[]
.driver_info = CX231XX_BOARD_CNXT_RDU_253S},
{USB_DEVICE(0x0572, 0x58A6),
.driver_info = CX231XX_BOARD_CNXT_VIDEO_GRABBER},
+ {USB_DEVICE(0x1F4D, 0x0102),
+ .driver_info = CX231XX_BOARD_OTG102},
{USB_DEVICE(0x0572, 0x589E),
.driver_info = CX231XX_BOARD_CNXT_RDE_250},
{USB_DEVICE(0x0572, 0x58A0),
diff -uprN linux-3.6/drivers/media/video/cx231xx/cx231xx.h linux-3.6.new/drivers/media/video/cx231xx/cx231xx.h
--- linux-3.6/drivers/media/video/cx231xx/cx231xx.h 2012-09-30 17:47:46.000000000 -0600
+++ linux-3.6.new/drivers/media/video/cx231xx/cx231xx.h 2013-02-26 16:01:58.924653199 -0700
@@ -68,6 +68,7 @@
#define CX231XX_BOARD_ICONBIT_U100 13
#define CX231XX_BOARD_HAUPPAUGE_USB2_FM_PAL 14
#define CX231XX_BOARD_HAUPPAUGE_USB2_FM_NTSC 15
+#define CX231XX_BOARD_OTG102 16
/* Limits minimum and default number of buffers */
#define CX231XX_MIN_BUF 4
Firmware
Like for many similar devices of various chipsets, a firmware image or images are required that the driver uploads to the device. These are often closed source binary blobs under unclear license as far as their redistributeability. To further complicate matters, there are various versions of these firmwares with the same name that are not (always) cross-compatible. To complicate matters even further, there is apparently a mix-up one of the firmware files distrusted though linuxtv.org and linux-firmware.git. See [1] and especially [2] for more information.
I have these in my /lib/firmware folder. These came from [3]. The Geniatech driver also contains a firmware image called cx416enc.rom which is very similar to the v4l-cx23885-enc.fw file (which is a renamed hcw85enc.rom from the HVR1800 driver).
16382 Jun 22 2010 /lib/firmware/v4l-cx231xx-avcore-01.fw (loads, but driver still works even without) 16382 Feb 27 17:49 /lib/firmware/v4l-cx23885-avcore-01.fw (not needed here?) 376836 Feb 25 22:23 /lib/firmware/v4l-cx23885-enc.fw (not needed here?) 16382 Jun 22 2010 /lib/firmware/v4l-cx25840.fw #md5sum /lib/firmware/v4l-cx2* a9f8f5d901a7fb42f552e1ee6384f3bb /lib/firmware/v4l-cx231xx-avcore-01.fw a9f8f5d901a7fb42f552e1ee6384f3bb /lib/firmware/v4l-cx23885-avcore-01.fw 1cb3c48a6684126f5e503a434f2d636b /lib/firmware/v4l-cx23885-enc.fw dadb79e9904fc8af96e8111d9cb59320 /lib/firmware/v4l-cx25840.fw
Usage
Live Viewing
- mplayer tv:// -tv driver=v4l2:device=/dev/video0:normid=0:alsa:adevice=hw.1:forceaudio:volume=80
- mplayer tv:// -tv driver=v4l2:device=/dev/video0:norm=NTSC:alsa:adevice=hw.1:forceaudio:volume=80:immediatemode=0:width=720
Encoding
- with mencoder, x264 video, mp3 audio, mp4 container (eg for computer viewing)
- mencoder tv:// -tv driver=v4l2:device=/dev/video0:norm=NTSC:alsa:adevice=hw.1:forceaudio:volume=80:immediatemode=0 -oac lavc -lavcopts acodec=libmp3lame:abitrate=192 -srate 48000 -ovc x264 -x264encopts global_header:nr=200:threads=auto:frameref=4:subq=4:8x8dct:crf=25:trellis=1:keyint=1000:keyint_min=10:bframes=16:b-adapt=1:b_pyramid=normal -of lavf -lavfopts format=mp4 -o test.mp4
- with mencoder, mpeg2 video, ac3audio, mpeg2 container (eg for dvd transfer)
- mencoder tv:// -tv driver=v4l2:device=/dev/video0:norm=NTSC:alsa:adevice=hw.1:forceaudio:volume=80:immediatemode=0:width=640 -of mpeg -mpegopts format=dvd:vaspect=4/3:vframerate=30 -ofps 30000/1001 -ovc lavc -oac lavc -lavcopts vcodec=mpeg2video:vrc_buf_size=1835:keyint=18:vbitrate=9000:vrc_maxrate=9800:acodec=ac3:abitrate=192:aspect=4/3 -o test.mpg
- some possibly useful video filters see mplayer man page for more
- -vf crop=w:h:x:y,scale=-2:480,expand=704:480
- crop video to specified width:height at position x:y, to remove fuzzy edges or unwanted parts of image, then scale to SD height of 480 and expand to SD 4/3 width of 704 (puts black bars on side of image, but maybe helpful for DVD player compatibility)
- -vf pp=ci,hqdn3d
- deinterlace with cubic interpolation, apply high quality denoise3d
- -vf crop=w:h:x:y,scale=-2:480,expand=704:480
Problems with audio
If mplayer etc. reports that the audio device is busy "error opening audio: Device or resource busy" and you are using pulseaudio, disable pulseaudio's control of the device, eg in pavucontrol (Pulse Audio Volume Control) under configuration, set the Cx231xx Audio device to be off. This will allow other programs to access the resource through the alsa device.
Problems with interference
Probably not specific to this board, but as a general note: I was initially getting frequent green lines (of about 1 line thickness) that ran across the image once every 0.5 to 3 seconds. I attributed this to some interference on the video feed, however changing cables did not help. I was especially stumped once the same pattern of interference occurred on the s-video input. Then I moved the device to a rear USB port on the motherboard instead of the front which it had been placed on. That solved the problem. Apparently the cable running from the motherboard header to the front USB ports on case was the source of interference, and it was on the USB output side rather than the video input.
Notes about the Windows drivers
I purchased an EZGrabber2 from Meritline early February 2013. It was the MyGica variant although the product page links to the Geniatech driver and software.
MyGica provides drivers at ezgrabber2driver.zip and otg103driver.zip (for the Capit) , both are the exact same file.
Geniatech lists a single driver for the EzGrabber/EzGrabber2/Capit products, ezgrabber2driver.zip.
MyGica
The install .inf file from the MyGica driver is called CxPlrCap.inf and contains the following device definitions:
[Maxytech] %CXPOLARIS_NAME.OTG102% =POLARIS.OTG102, USB\VID_1F4D&PID_0102&MI_01 %CXPOLARIS_NAME.U237% =POLARIS.U237, USB\VID_1F4D&PID_0237&MI_01 %CXPOLARIS_NAME.OTG102CIR% =POLARIS.CIR, USB\VID_1F4D&PID_0102&MI_00
The driver directory contains the following files:
23678 Oct 28 2009 CxPlrCap.inf
187776 Jan 6 2010 CxPlrCap.sys
29184 Sep 8 2009 CxPolaris.ax
18432 Sep 8 2009 cpnotify.ax
10154 Jan 7 2010 cxplrcap.cat
24576 Sep 8 2009 cxtvrate.dll
336 Sep 24 2009 maxcir.bin
8404 Jan 7 2010 maxcir.cat
1440 Sep 17 2009 maxcir.inf
32256 Oct 9 2009 maxcir.sys
16382 Jan 20 2009 merlinD.bin
28672 Sep 8 2009 y8cnvt.ax
Geniatech
The install .inf file from the Geniatech driver is called CxCVBS.inf and contains the following device definitions:
[Conexant.NTx86] %CXPOLARIS.DeviceDesc-CVBS%=POLARIS.CVBS, USB\VID_1F4D&PID_0102&MI_01 %CXPOLARIS.DeviceDesc-CVBS%=POLARIS.CVBS, USB\VID_0572&PID_58A3&MI_01 %CXPOLARIS.DeviceDesc-VGrabber%=POLARIS.VGrabber, USB\VID_0572&PID_58A6&MI_01 %CXPOLARIS.DeviceDesc-EZCap%=POLARIS.EZCap, USB\VID_0572&PID_58A7&MI_01
The driver directory contains the following files:
18432 Oct 23 16:12 CPNotify.ax
31704 Oct 23 16:11 CxCVBS.inf
195712 Oct 23 16:13 CxCVBS.sys
3449 Oct 23 17:36 CxUnCir.inf
47104 Oct 23 16:12 EncPrxyPage.ax
2944000 Sep 7 15:31 Setup.exe
33792 Oct 23 16:12 Y8Cnvt.ax
376836 Jul 18 2012 cx416enc.rom
15360 Oct 23 16:12 cxEZCAP.ax
47104 Oct 23 16:12 cxTVRate.dll
11407 Oct 23 16:13 cxcvbs.cat
30720 Oct 23 16:12 cxpolaris.ax
8578 Oct 23 17:36 cxuncir.cat
16382 Jul 18 2012 merlinD.rom
It is also worth noting that the Geniatech ezgrabber2driver.zip file contains both Windows and Linux directories. It was due to this that I originally purchased this device hoping they had included some support for Linux, and they do provide Linux drivers for some of their other products. However, it appears to be a mistake. The only modification of drivers in the tree I can find are some alternate definitions for au0828 cards, specifically defining 05e1:0400 and 1f4d:6011 as AU0828_BOARD_HAUPPAUGE_WOODBURY.
Other notes
Diamond VC500 EZgrabber
In some places it is noted that (some versions of?) the Diamond VC500 EZgrabber are also identified as OTG102, a cursory web search suggests this has a TM5600/6000 chipset and the Windows drivers provided by Diamond appear totally different.
lsusb ouput
lsusb -v -d 1f4d:
Bus 001 Device 006: ID 1f4d:0102 G-Tek Electronics Group
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 ?
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
idVendor 0x1f4d G-Tek Electronics Group
idProduct 0x0102
bcdDevice 40.01
iManufacturer 1 Geniatech
iProduct 2 OTG102
iSerial 3 20090427
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 248
bNumInterfaces 6
bConfigurationValue 1
iConfiguration 4 OTG102
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 32 OTG102
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x8e EP 14 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0020 1x 32 bytes
bInterval 4
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x0e EP 14 OUT
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0020 1x 32 bytes
bInterval 4
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 1
bInterfaceCount 5
bFunctionClass 255 Vendor Specific Class
bFunctionSubClass 255 Vendor Specific Subclass
bFunctionProtocol 255 Vendor Specific Protocol
iFunction 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 7 OTG102
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x8f EP 15 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 7
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 20 OTG102
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
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 21 OTG102
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x001c 1x 28 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 2
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 22 OTG102
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0034 1x 52 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 23 OTG102
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
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 24 OTG102
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x00b8 1x 184 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 2
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 25 OTG102
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x02d8 1x 728 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 3
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 26 OTG102
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x13c4 3x 964 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 4
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 27 OTG102
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0b84 2x 900 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 4
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 28 OTG102
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
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 4
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 31 OTG102
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 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 5
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 29 OTG102
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 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 5
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 30 OTG102
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x86 EP 6 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0240 1x 576 bytes
bInterval 1
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 ?
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0000
(Bus Powered)
dmesg output
(load modules) [12648.151975] i2c-core: driver [cx25840] registered [12653.604826] usbcore: registered new interface driver cx231xx ... (plug in device) ... [44269.470642] usb 1-10: new high-speed USB device number 6 using ehci_hcd [44269.588530] cx231xx #0: New device Geniatech OTG102 @ 480 Mbps (1f4d:0102) with 5 interfaces [44269.588534] cx231xx #0: registering interface 1 [44269.588700] cx231xx #0: Identified as Geniatech OTG102 (card=16) [44269.588906] i2c-dev: adapter [cx231xx #0] registered as minor 9 [44269.588922] i2c i2c-9: adapter [cx231xx #0] registered [44269.588987] i2c-dev: adapter [cx231xx #0] registered as minor 10 [44269.589000] i2c i2c-10: adapter [cx231xx #0] registered [44269.589059] i2c-dev: adapter [cx231xx #0] registered as minor 11 [44269.589071] i2c i2c-11: adapter [cx231xx #0] registered [44269.652071] cx231xx #0: cx231xx_dif_set_standard: setStandard to ffffffff [44269.661396] i2c 9-0044: uevent [44269.661413] cx25840 9-0044: probe [44269.662686] cx25840 9-0044: cx23102 A/V decoder found @ 0x88 (cx231xx #0) [44269.670801] i2c i2c-9: client [cx25840] registered with bus id 9-0044 [44269.680705] cx25840 9-0044: Firmware download size changed to 16 bytes max length [44271.728514] cx25840 9-0044: loaded v4l-cx231xx-avcore-01.fw firmware (16382 bytes) [44271.762699] cx231xx #0: cx231xx #0: v4l2 driver version 0.0.2 [44271.780277] cx231xx #0: cx231xx_dif_set_standard: setStandard to ffffffff [44271.825192] cx231xx #0: video_mux : 0 [44271.825194] cx231xx #0: do_mode_ctrl_overrides : 0xb000 [44271.825936] cx231xx #0: do_mode_ctrl_overrides NTSC [44271.832517] cx231xx #0: cx231xx #0/0: registered device video0 [v4l2] [44271.832587] cx231xx #0: cx231xx #0/0: registered device vbi0 [44271.832589] cx231xx #0: V4L2 device registered as video0 and vbi0 [44271.832593] cx231xx #0: EndPoint Addr 0x84, Alternate settings: 5 [44271.832595] cx231xx #0: Alternate setting 0, max size= 512 [44271.832597] cx231xx #0: Alternate setting 1, max size= 184 [44271.832599] cx231xx #0: Alternate setting 2, max size= 728 [44271.832601] cx231xx #0: Alternate setting 3, max size= 2892 [44271.832603] cx231xx #0: Alternate setting 4, max size= 1800 [44271.832605] cx231xx #0: EndPoint Addr 0x85, Alternate settings: 2 [44271.832608] cx231xx #0: Alternate setting 0, max size= 512 [44271.832610] cx231xx #0: Alternate setting 1, max size= 512 [44271.832612] cx231xx #0: EndPoint Addr 0x86, Alternate settings: 2 [44271.832614] cx231xx #0: Alternate setting 0, max size= 512 [44271.832616] cx231xx #0: Alternate setting 1, max size= 576 [44272.257701] cx231xx #0: cx231xx-audio.c: probing for cx231xx non standard usbaudio [44272.258497] cx231xx #0: EndPoint Addr 0x83, Alternate settings: 3 [44272.258502] cx231xx #0: Alternate setting 0, max size= 512 [44272.258505] cx231xx #0: Alternate setting 1, max size= 28 [44272.258507] cx231xx #0: Alternate setting 2, max size= 52 [44272.258509] cx231xx: Cx231xx Audio Extension initialized [44272.263730] cx25840 9-0044: uevent [44272.263891] cx25840 9-0044: uevent [44272.264295] cx25840 9-0044: uevent [44272.272518] cx231xx #0: cx231xx_stop_stream():: ep_mask = 8 [44272.273408] cx231xx #0: setPowerMode::mode = 48, No Change req. [44272.274797] cx231xx #0: cx231xx_stop_stream():: ep_mask = 8
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