On Jun 15, 2008, at 9:17 PM, Andy Walls wrote: > On Mon, 2008-06-16 at 01:43 +0200, hermann pitton wrote: >> Hi, >> >> Am Sonntag, den 15.06.2008, 18:04 -0400 schrieb Andy Walls: >>> On Sun, 2008-06-15 at 08:05 -0400, Brandon Jenkins wrote: > >>>> Also, I have noticed a new message in dmesg indicating that ir >>>> transmitters may now be accessible? Is there anything I need to >>>> do to >>>> make use of them? >>>> >>>> tveeprom 2-0050: has no radio, has IR receiver, has IR transmitter >>> >>> The IR on the HVR-1600 (a Zilog Z8F0811 microcontroller) is very >>> much >>> like that of the PVR-150. From what I can tell, it even appears >>> to be >>> at the same i2c address. >>> >>> This previous message also indicates the PVR-150/500 IR is very >>> similar >>> to the HVR-1600: >>> http://www.linuxtv.org/pipermail/linux-dvb/2008-February/023532.html >>> >>> >>> Right now the cx18 driver has omitted some code present in ivtv >>> related >>> to explicit reset of the IR microcontroller. It shouldn't be hard >>> to >>> add back that reset code, if needed. >>> >>> I haven't had a chance to try the IR blaster out yet (it was on my >>> todo >>> list before Feb 2009). "Mark's brain dump" has a modified lirc >>> package >>> for the PVR-150 IR blaster: >>> >>> http://www.blushingpenguin.com/mark/blog/?p=24 >>> http://charles.hopto.org/blog/?p=24 >>> >>> It's probably a good starting point. There are likely to be >>> differences >>> though, as the cx23418 has 2 I2C buses where the cx23416 only has >>> 1 I2C >>> bus. >>> >>> It looks like you're blazing a trail, as I can't find any >>> documentation >>> on the 'net by anyone who has done this with a HVR-1600. If >>> lirc_i2c, >>> available with the normal lirc distribution for IR receive, can >>> detect >>> the Z8F0811, you've probably got a good start. >>> >>> Regards, >>> Andy >>> >>>> Thanks! >>>> >>>> Brandon >>> >> >> just a note, have been there already coming from other stuff to it, >> but don't remember the details off hand. >> >> http://marc.info/?l=linux-video&m=119705840327989&w=2 >> >> and following. > > Hermann, > > Thanks. More information is always good. > > > Hermann and Brandon, > > I have done some research, (at least one version of) the PVR-150 and > the > HVR-1600 both appear to use the Zilog Z8F0811 microcontroller. The > lirc_pvr150 module probably has a good chance of working for IR Tx > with > the HVR-1600. > > I have just examined the lirc_pvr150 code, the kernel i2c-core, the > cx18 > and ivtv code. Changes will be needed in: > > 1. lirc_pvr150.c > - add request_module("cx18") near the end > > - change the explicit call to ivtv_reset_ir_gpio() to a > cx18 equivalent or somehow change to an ioctl() > so that the code is more flexible. > (Note that the cx18 i2c_adapter callback data has a > different structure than ivtv to include not only the > card handle (struct ivtv/cx18 *), but also the i2c bus index) > (Note that this module directly calls an ivtv module function: > not a very clean interface.) > > - change the struct ivtv declaration to a struct cx18 > > - maybe some other stuff that all looks straightforward > > 2. cx18 driver: > - port the ivtv_reset_ir_gpio() to cx18-gpio.c but using the > struct cx18_i2c_callback_data * as the input argument. > > - add back the (private) ioctl() that also resets the IR chip > > - perhaps modify the cx18's "read/modify/write" strategy for i2c > bus registers to "read mirrored copy/modify/write" to > avoid PCI bus read aborts from trashing CX23418 I2C > registers > > I'll add the reset code to the cx18-i2c repository I have at > linuxtv.org > when I get the chance. > > I am at a loss to describe the lirc_pvr150.c code. I don't quite > understand all the firmware "magic" going on in the code. The scripts > in lirc/tools/pvr150 help a little. I'd want to make as few changes > as > possible to lirc_pvr150.c and hope it works. > > >> I was under the impression we have already duplicate code? > > Almost duplicate. In the initial port from ivtv to cx18, Hans left > out > the CX23415 decoder code and the (ugly?) things which may not have > been > needed or used. We'll add those back in as needed. > > It already appears necessary to add Zilog IR chip reset (and GPIO > audio > mux switching) back into the cx18 driver. But I'd like a cleaner > interface to the IR chip reset functions in the long run. > > -Andy > >> Cheers, >> Hermann > > Andy, Thank you for taking an interest. I am not quite sure what you said above, but if you need someone to test I am willing to do so. While I was trying to figure out how to make this work; I did find the lirc_pvr150 code, but got lost when trying to make it work with the cx18. I do have the firmware downloaded as well. I can set up a HG clone of which ever branch of yours you'd like me to use. The only drivers I compile are for the cx18 and for the HD-PVR, which I can merge into your branch. Regards, Brandon _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
