I am having trouble writing a parport device driver which
seems to relate to the kernel driver code from parport_pc.
That is the parport_pc code seems to detect the port
differently depending on its mood. It's a modern parallel
port (Pentium III) with everything enabled. Here are two
entries from the same day.
Apr 9 15:52:23 continuum kernel: parport0: PC-style at
0x378 (0x778) [SPP,ECP,ECPEPP,ECPPS2]
Or there's this one.
Apr 10 00:34:11 continuum kernel: 0x278: CTR: wrote 0x0c,
Apr 10 00:34:11 continuum kernel: 0x278: DATA: wrote 0xaa,
Apr 10 00:34:11 continuum kernel: parport0: PC-style at
The driver I'm writing needs the port in standard SPP mode
with bidirectional enabled.
outb 34, 77a
inb 77a = 35
outb 30, 37a
I do this in the driver as I can't seem to get the parport
layer to do it automatically. The thing is, when it
doesn't decide to detect all the fancy ECP/EPP features,
the above steps don't work.
Any suggestions would be greatly appreciated.
-- Shane Wegner: email@example.com http://www.cm.nu/~shane/ PGP: 1024D/FFE3035D A0ED DAC4 77EC D674 5487 5B5C 4F89 9A4E FFE3 035D
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