Hello everyone,
One of these arrived at my door today, the world's first USB DVB-T2
tuner. So PCs can finally receive Freeview HD here in the UK... but only
on Windows.
My experience with Linux kernel development is more or less zilch - more
of a spectator sport for me, although I've been subscribed to
linux-media for a couple of months now. I will help how I can, but I
expect that by myself, this would take an awful long time and never make
it into the kernel. So everyone's help is appreciated.
Pics to follow once my camera battery is recharged, but here is
preliminary info:
dmesg
-----
[27892.030018] usb 2-2: new high speed USB device using ehci_hcd and
address 54
lsusb
-----
Bus 002 Device 054: ID 2013:024f Unknown (Pinnacle?)
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x2013 Unknown (Pinnacle?)
idProduct 0x024f
bcdDevice 1.00
iManufacturer 1 PCTV Systems
iProduct 2 PCTV 290e
iSerial 3 00000006LL9R
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 55
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x85 EP 5 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 1
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x03ac 1x 940 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x85 EP 5 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x03ac 1x 940 bytes
bInterval 1
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0000
(Bus Powered)
PCB
---
It's a very small (smaller than most USB-stick tuners) device,
implemented on two PCBs sandwiched together.
Tuner: NXP TDA18271HDA2
USB IC: Empia em28174 (is this part of the 2874 family, the 2871, or
something else?
http://www.linuxtv.org/wiki/index.php/Em28xx_devices#em2874 )
Demod: Sony CXD2820R
The demod is no surprise given it's about the only T2 compatible demod
out there (LSI might have one too, if memory serves).
So, what's next? Any PCTV Linux driver contributors active here? I will
next attempt to find a datasheet for the Sony demod, then grab some
usbsnoop data, although the only Windows machine I have that can get
near a fixed antenna is Atom powered... so it ain't great.
Questions, requests, demands and insults are all welcomed.
Regards,
--
Steve Kerrison MEng Hons.
http://www.stevekerrison.com/
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