Em Sun, 9 Nov 2014 21:35:17 +0000 Sean Young <sean@xxxxxxxx> escreveu: > On Thu, Nov 06, 2014 at 08:56:47AM -0500, Andy Walls wrote: > > On November 6, 2014 8:54:28 AM EST, Andy Walls <awalls.cx18@xxxxxxxxx> wrote: > > >Sean, > > > > > >Ir-kbd-i2c was never intended for Tx. > > > > > >You can transmit *short* arbitrary pulse-space streams with the zilog > > >chip, by feeding it a parameter block that has the pulse timing > > >information and then subsequently has been obfuscated. The firmware > > >file that LIRC uses in userspace is full of predefined versions of > > >these things for RC5 and NEC IIRC. This LIRC firmware file also holds > > >the (de)obfuscation key. > > > > > >I've got a bunch of old notes on this stuff from essentially reverse > > >engineering the firmware in the Z8. IANAL, but to me, its use in > > >developing in-kernel stuff could be dubious. > > > > > >Regards, > > >Andy > > Very interesting. > > I had considered reverse engineering the z8 firmware but I never found a > way to access it. I guess we have three options: > > 1. I could use Andy's notes to implement Tx. I have not seen the original > firmware code so I'm not contaminated by reverse engineering it. IANAL > but I thought this is an acceptable way of writing a driver. > > 2. Hauppauge could prove us with documentation to write a driver with. I tried to get some info about that, but they are unable to get anything related to this design so far. So, I think that, if you have some time to dedicate to it, the best would be to go for option #1. > 3. Leave it as-is, lirc_zilog will eventually be deleted from staging as it > can't be ported to rc-core. > > > Sean > -- > To unsubscribe from this list: send the line "unsubscribe linux-media" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
