DVB-T (siano sms1xxx) w Video4BSD/Cuse4BSD

[Joerg Pulz]

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Hi,

today i found some time to try the latest stuff regarding Video4BSD and 
DVB-T USB devices.
My system is:
FreeBSD hades.admin.frm2 8.0-STABLE FreeBSD 8.0-STABLE #2: Thu Jan 21 
12:42:55 CET 2010     root at hades.admin.frm2:/usr/obj/usr/src/sys/GENERIC 
amd64

My device is a Hauupauge WinTV MiniStick:
usbconfig -u 7 -a 3 dump_device_desc

ugen7.3: <WinTV MiniStick Hauppauge Computer Works> at usbus7, cfg=0 
md=HOST spd=HIGH (480Mbps) pwr=ON

   bLength = 0x0012
   bDescriptorType = 0x0001
   bcdUSB = 0x0200
   bDeviceClass = 0x0000
   bDeviceSubClass = 0x0000
   bDeviceProtocol = 0x0000
   bMaxPacketSize0 = 0x0040
   idVendor = 0x2040
   idProduct = 0x5500
   bcdDevice = 0x0001
   iManufacturer = 0x0001  <Hauppauge Computer Works>
   iProduct = 0x0002  <WinTV MiniStick>
   iSerialNumber = 0x0003  <f0683e81>
   bNumConfigurations = 0x0001

I svn up'ed the sources (revision 1469) and recompiled. So far everything 
wnet fine. I kldload'ed video4bsd and cuse4bsd without errors.
After plugging in the DVB-T stick i tried to start webcamd and it just 
bails out with a segmentation fault:
./webcamd
Attached ugen7.3[0] to cuse unit 0
Segmentation fault (core dumped)

After recompiling webcamd with "-g" and using gdb i found that it faults 
at: v4l-dvb-82bbb3bd0f0a/linux/drivers/media/dvb/siano/smsusb.c (line 358)
Which is the following line:
     snprintf(params.devpath, sizeof(params.devpath),
         "usb\\%d-%s", dev->udev->bus->busnum, dev->udev->devpath);

As i'm not that deep inside Video4BSD i'm lost at this point.

The only thing i already tried was uncommentig the above line and trying 
again. This in fact, solved the segmentation fault and results in the 
following output:

./webcamd -f /tmp
Attached ugen7.3[0] to cuse unit 0
Loading firmware at '/tmp/sms1xxx-hcw-55xxx-dvbt-02.fw', f=7
Creating /dev/dvb/adapter0/demux0
Creating /dev/dvb/adapter0/dvr0
Creating /dev/dvb/adapter0/frontend0

So it seems the device should work but it doesn't. Whatever i try no 
application identifies it as a usable device.
A simple 'cat /dev/dvb/adapter0/dvr0' results in "Device not configured".
May be this is due to uncommenting the code in smsusb.c, i don't know.
What i found by doing a simple 'ls -l /dev/dvb/adapter0' is that the above 
mentioned devices (demux0, dvr0 and frontend0) exist twice!

ls -l /dev/dvb/adapter0
<snip>
crw-r--r--  1 root  operator    0, 224 Feb 15 15:25 demux0
crw-r--r--  1 root  operator    0, 224 Feb 15 15:25 demux0
crw-------  1 root  operator    0, 225 Feb 15 15:25 demux_daemon0
crw-r--r--  1 root  operator    0, 226 Feb 15 15:25 dvr0
crw-r--r--  1 root  operator    0, 226 Feb 15 15:25 dvr0
crw-------  1 root  operator    0, 227 Feb 15 15:25 dvr_daemon0
crw-r--r--  1 root  operator    0, 228 Feb 15 15:25 frontend0
crw-r--r--  1 root  operator    0, 228 Feb 15 15:25 frontend0
crw-------  1 root  operator    0, 229 Feb 15 15:25 frontend_daemon0
<snap>

I don't know how this is possible?

Anyway, any help is much appreciated.

Thanks and kind regards
Joerg

- -- 
The beginning is the most important part of the work.
 				-Plato
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