/dev/video? on Somagic SMI-2021CBE

Bartek Zdanowski

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Oct 31, 2013, 5:54:27 AM10/31/13

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Hello.

My name is Bartek. This is my first post on this group.

My problem is that, I've succeeded to run Somagic SMI-2021CBE with easycap-somagic. I can successfuly do somagic-capture | mplayer and see output.

But now is the question. How can I create /dev/video* device file so I can use other software that streams video from it? There's no any file after running firmware upload and somagic-capture.

Other question will be how to have all 4 video files for all 4 channels but that's next story.

Thank you for any suggestions,

Bartek

tosiara

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Oct 31, 2013, 4:12:18 PM10/31/13

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After you plugged in and initialized the device, loaded all needed modules - /dev/video should be auto created.

Maybe there is something logged in dmesg?

Pedro Martos

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Oct 31, 2013, 4:22:25 PM10/31/13

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Hi Bartek,

To get /dev/videoX you need to use the v4l driver (the driver creates the device file), not the userland application somagic-capture.

best regards,

Pedro

2013/10/31 Bartek Zdanowski <bartek.z...@gmail.com>

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Bartek Zdanowski

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Oct 31, 2013, 5:35:53 PM10/31/13

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On Thursday, October 31, 2013 9:12:18 PM UTC+1, tosiara wrote:

After you plugged in and initialized the device, loaded all needed modules - /dev/video should be auto created.

Maybe there is something logged in dmesg?

Only info that device was discovered. No errors there. I have obviously /dev/video0 but it's my built in laptop camera. But no new /dev/video

Bartek Zdanowski

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Oct 31, 2013, 5:37:35 PM10/31/13

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On Thursday, October 31, 2013 9:22:25 PM UTC+1, Pedro wrote:

Hi Bartek,

To get /dev/videoX you need to use the v4l driver (the driver creates the device file), not the userland application somagic-capture.

I don't get it.
Can you give me an example or point to some readings or exactly write what you mean?

Thank you all for responses.

best regards,

Pedro

2013/10/31 Bartek Zdanowski <bartek.z...@gmail.com>

Hello.
My name is Bartek. This is my first post on this group.

My problem is that, I've succeeded to run Somagic SMI-2021CBE with easycap-somagic. I can successfuly do somagic-capture | mplayer and see output.

But now is the question. How can I create /dev/video* device file so I can use other software that streams video from it? There's no any file after running firmware upload and somagic-capture.

Other question will be how to have all 4 video files for all 4 channels but that's next story.

Thank you for any suggestions,
Bartek

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calamari

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Oct 31, 2013, 5:40:46 PM10/31/13

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You need to build and insert the kernel module to get something in /dev.
Jeff

Bartek Zdanowski

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Oct 31, 2013, 5:44:31 PM10/31/13

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Tosiara,
I missed the "modules" word. What exactly do you mean? I followed instructions on
http://code.google.com/p/easycap-somagic-linux/wiki/GettingStarted

this is the only thing I did.

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Bartek Zdanowski

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Oct 31, 2013, 6:11:07 PM10/31/13

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Jeff, guys,

On Thursday, October 31, 2013 10:40:46 PM UTC+1, calamari wrote:

You need to build and insert the kernel module to get something in /dev.

Now I get it! I'm stupid regarding all those kernels and modules. I just don't understand this. I suggest to put some info at the top of main page that building and running module is essential to have separate video device.

The page describing building the module has no word about it. One should already know that building module is needed. And I suppose all linux hackers already know that. But I'm ordinary user and don't know that.

Anyway, thank you ALL for responses. Now I will download and build module from sources.

Greetings,

Bartek

tosiara

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Nov 1, 2013, 8:05:39 AM11/1/13

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Can you please post your dmesg (or at least those lines that related to your device plug/unplug)?

Bartek Zdanowski

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Nov 2, 2013, 5:11:21 AM11/2/13

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Hi.

Plugin in

[11704.143238] usb 2-1.1: new high-speed USB device number 5 using ehci-pci

[11704.236709] usb 2-1.1: New USB device found, idVendor=1c88, idProduct=0007

[11704.236721] usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3

[11704.236728] usb 2-1.1: Product: SM-USB 007

[11704.236733] usb 2-1.1: Manufacturer: Somagic, Inc.

[11704.236737] usb 2-1.1: SerialNumber: SMBL007

initializing somagic with firmware

[11753.181381] usb 2-1.1: USB disconnect, device number 5

[11753.379507] usb 2-1.1: new high-speed USB device number 6 using ehci-pci

[11753.473162] usb 2-1.1: New USB device found, idVendor=1c88, idProduct=003f

[11753.473174] usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3

[11753.473180] usb 2-1.1: Product: SMI Grabber Dev

[11753.473185] usb 2-1.1: Manufacturer: Somagic, Inc.

[11753.473190] usb 2-1.1: SerialNumber: SMIVIDEO3E9876543210

disconnecting

[11795.302248] usb 2-1.1: USB disconnect, device number 6

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tosiara

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Nov 2, 2013, 3:46:40 PM11/2/13

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Are using driver from Google repo (outdated) or built your own from linuxtv patch (using current build instructions)?

Could you provide you output of "uname -a"?

My dmesg looks like this:

[ 2242.356019] usb 2-6: new high-speed USB device number 3 using ehci-pci
[ 2242.471499] usb 2-6: New USB device found, idVendor=1c88, idProduct=0007
[ 2242.471510] usb 2-6: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 2242.471517] usb 2-6: Product: SM-USB 007
[ 2242.471524] usb 2-6: Manufacturer: Somagic, Inc.
[ 2242.471529] usb 2-6: SerialNumber: SMBL007
[ 2242.471952] usb 2-6: Looking for: smi2021_3c.bin
[ 2242.473977] usb 2-6: Looking for: smi2021_3e.bin
[ 2242.474087] usb 2-6: Found firmware for 0x003e
[ 2242.474094] usb 2-6: Looking for: smi2021_3f.bin
[ 2242.491672] usb 2-6: USB disconnect, device number 3
[ 2242.491725] usb 2-6: Releasing firmware for 0x003e
[ 2242.726326] usb 2-6: new high-speed USB device number 4 using ehci-pci
[ 2242.841907] usb 2-6: New USB device found, idVendor=1c88, idProduct=003e
[ 2242.841918] usb 2-6: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 2242.841925] usb 2-6: Product: SMI Grabber Dev
[ 2242.841931] usb 2-6: Manufacturer: Somagic, Inc.
[ 2242.841937] usb 2-6: SerialNumber: SMIVIDEO3E9876543210
[ 2242.859546] saa7115 3-004a: gm7113c found @ 0x94 (smi2021)
[ 2242.879146] smi2021 2-6:1.0: Somagic Easy-Cap Video Grabber

The last line indicates that module has successfully loaded and I don't see this line in your output

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Bartek Zdanowski

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Nov 3, 2013, 8:38:10 AM11/3/13

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Hi.

I'm using soft taken from

https://code.google.com/p/easycap-somagic-linux/downloads/list

My uname

Linux 3.11.0-12-generic #19-Ubuntu SMP Wed Oct 9 16:20:46 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

b

Tosiara, I don't use module. I just stick grabber into USB port and run steps from page

http://code.google.com/p/easycap-somagic-linux/wiki/GettingStarted

I think that I should compile a module. Or is it available from somewhere, ready to use?

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tosiara

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Nov 3, 2013, 10:36:50 AM11/3/13

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There is no pre-built module for download because it depends on the kernel you re running.

Not sure how that goes with Ubuntu, but I have successfully built the new module for openSUSE 3.11 kernel

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Bartek Zdanowski

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Nov 3, 2013, 10:58:15 AM11/3/13

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I'm currently trying to build new module. I have first difference with Ubuntu. I will provide the list of differences in Ubuntu to put on the page so that will be helpful for others.

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Bartek Zdanowski

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Nov 4, 2013, 5:08:47 PM11/4/13

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Hi.

I've build module but no progress. I do modprobe without errors. lsmod shows saa7115 module on the list.

When I plug my easycap device I get the same output in dmesg.

[ 7673.729603] usb 2-1.1: New USB device found, idVendor=1c88, idProduct=0007

[ 7673.729608] usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3

[ 7673.729611] usb 2-1.1: Product: SM-USB 007

[ 7673.729613] usb 2-1.1: Manufacturer: Somagic, Inc.

[ 7673.729616] usb 2-1.1: SerialNumber: SMBL007

Nothing more. I can see that your module tries to locate firmware. I don't have any of these entries in dmesg.

:(

On Sat, Nov 2, 2013 at 8:46 PM, tosiara <tos...@gmail.com> wrote:

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Bartek Zdanowski

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Nov 7, 2013, 9:27:33 AM11/7/13

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@Tosiara

any thoughts? @Others?

I've compiled modules with DEBUG but nothing showed up in dmesg :(

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Jon Arne Jørgensen

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Nov 7, 2013, 10:29:39 AM11/7/13

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Did you modprobe the smi2021 module also?
Or did you just modprobe saa7115?

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Bartek Zdanowski

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Nov 7, 2013, 10:59:36 AM11/7/13

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Both.

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tosiara

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Nov 13, 2013, 9:34:10 AM11/13/13

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Could you post complete sequence of command that you are doing?
How did you built the module? Where it is located? What is PWD? When you use modprobe and when insmod? Is there any errors about symbols in dmesg when you do insmod?

Both.

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Bartek Zdanowski

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Nov 14, 2013, 3:07:30 AM11/14/13

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I will do it in a few days. I have less spare time. Thank you for your help and patience.

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