[linux-dvb] Question regarding stv0299_send_diseqc_msg

[Manfred Petz <pm@deuromedia.at>]

Hi all,

I'm trying to solve a problem with the 2.4 DVB driver and WinTV Nova-CI cards 
and Technistat Gigaswitch 11/20G DiSEqC's. The 2.4 version of the driver cannot 
tune with these switches. The 2.6 version works fine. WinTV Nexus cards with 
2.4 driver also work.

I traced down the I2C dialog. I did a small modification to the SU1278 
initialization, to make it identical to what the 2.6 driver does.


There's a difference between the 2.4 and 2.6 version when it comes to sending 
the DiSEqC message:


2.4 driver in stv0299_send_diseqc_msg()

	R 0x0a -> 0xc2	Is Idle (&0x2 == 0x2)	stv0299_wait_diseqc_idle()
	R 0x08 -> 0x42	Get DiSEqC mode
	W 0x08 -> 0x46	Set mode to (0x42&~0x7) | 0x6

	Send DiSEqC message:

		R 0x0a -> 0xc2	Fifo ready (0xc2&0x01 == 0x00)
		W 0x09 -> 0xe0	Octet #0
		R 0x0a -> 0xc0	Fifo ready (0xc0&0x01 == 0x00)
		W 0x09 -> 0x10	Octet #1
		R 0x0a -> 0xe0	Fifo ready (0xe0&0x01 == 0x00) !!!??
		.
		.
		.

In the 2.6 driver, the last line is

		R 0x0a -> 0xe1	Fifo NOT ready
		R 0x0a -> 0xc0	Fifo Ready
		.
		.
		.


It's reproducible, I don't think, that this is a timing issue. Can someone 
explain me that or give me a hint where to search? It seems  that the STV0299 
is just ignoring the command...?

The complete stv0299_send_diseqc_msg() in the non-working 2.4 is:

		R 0x0a -> 0xc2
		R 0x08 -> 0x42
		W 0x08 -> 0x46
		R 0x0a -> 0xc2
		W 0x09 -> 0xe0
		R 0x0a -> 0xc2
		W 0x09 -> 0x10
		R 0x0a -> 0xc2
		W 0x09 -> 0x38
		R 0x0a -> 0xc2
		W 0x09 -> 0xf3
		R 0x0a -> 0xc0
		R 0x0a -> 0xc2

And for the working 2.6 version:

		R 0x0a -> 0xc2
		R 0x08 -> 0x42
		W 0x08 -> 0x46
		R 0x0a -> 0xc2
		W 0x09 -> 0xe0
		R 0x0a -> 0xc0
		W 0x09 -> 0x10
		R 0x0a -> 0xe1
		R 0x0a -> 0xc0
		W 0x09 -> 0x38
		R 0x0a -> 0xc0
		W 0x09 -> 0xf3
		R 0x0a -> 0xc1
		R 0x0a -> 0xe0



The DiSEqC is o.k. The same Nova card is functioning in a Windoze machine with 
the
TT software.


pm