Damn Small Linux - Not!

Juanito · Joined: 11 Sep 2006 Posts: 88 Location: Dubai, U.A.E.

This might be trivial to some, but I never managed to get infrared working on DSL and it took a lot of searching with Google to find the parameters to pass to get things working with DSL-N.

This works for an SMC Fast Infrared (FIR) port on a Dell Latitude D400 - using the Device Manager in W2k, I found the following:

ISA IRQ=3, DMA=3, I/O port adresses 0x0280, 0x02F0

So, after "apt-get install irda-utils", you need to do the following:
[code:1]root@dslbox:~# setserial /dev/ttyS1 uart none
root@dslbox:~# modprobe smsc-ircc2 ircc_irq=3 ircc_dma=3 ircc_sir=0x2f8 ircc_fir=0x280
root@dslbox:~# irattach irda0 -s[/code:1]
To check that the modules loaded and device irda0 was configured on IRQ3:
[code:1]root@dslbox:~# lsmod
Module Size Used by
...
smsc_ircc2 17948 0
irda 118200 1 smsc_ircc2
crc_ccitt 5888 1 irda
root@dslbox:~# cat /proc/interrupts
CPU0
...
3: 451611 XT-PIC irda0
...[/code:1]
Then you can test if the port "sees" other devices by using "irdadump" from irda-utils:
[code:1]root@dslbox:~# irdadump
17:16:25.865506 xid:cmd a1e01eea > ffffffff S=6 s=4 (14)
17:16:25.955455 xid:cmd a1e01eea > ffffffff S=6 s=5 (14)
17:16:26.045442 xid:cmd a1e01eea > ffffffff S=6 s=* dslbox hint=0400 [ Computer ] (22)
...
[brought SonyEricsson P900 mobile phone within range of FIR port]
...
17:16:29.027553 xid:rsp a1e01eea < 2498301e S=6 s=1 P900 hint=9325 [ PnP PDA/Palmtop Modem Telephony IrCOMM IrOBEX ] (21)
17:16:29.044986 xid:cmd a1e01eea > ffffffff S=6 s=* dslbox hint=0400 [ Computer ] (22)
17:16:30.739679 xid:cmd ffffffff < 2498301e S=1 s=0 (14)
17:16:30.739689 xid:rsp a1e01eea > 2498301e S=1 s=0 dslbox hint=0400 [ Computer ] (22)
17:16:30.856458 xid:cmd ffffffff < 2498301e S=1 s=* P900 hint=9325 [ PnP PDA/Palmtop Modem Telephony IrCOMM IrOBEX ] (21)
17:16:30.904344 snrm:cmd ca=fe pf=1 a1e01eea < 2498301e new-ca=8e
...[/code:1]
Of course now it works, I have to figure out what to do with it... Laughing