On Mon, May 13, 2002 at 08:38:37PM -0400, Charles Lepple wrote:
> The SMSC datasheet talks about the Distec (sp?) daisy-chain
> protocol, which I assume is what drivers/parport/daisy.c is doing,
> but some pieces seem to be missing.
drivers/parport/daisy.c implements IEEE 1284.3 daisy-chaining. I
don't know what 'Distec' is I'm afraid.
> parport0: PC-style at 0x378 (0x778), irq 7 [PCSPP,TRISTATE,COMPAT,ECP]
> parport0: Found 1 daisy-chained devices
> parport0: Peripheral not IEEE1284 compliant (0x7F)
> basically empty, and the kernel message log doesn't indicate any sort of
> attempt at probing.
The attempt is cut short by the realization that it's going
wrong---that's what the 'not compliant' message is I think.
> Does anyone know if I can even do the daisy-chain enable command
> from user space?
Of course, since you have access to all the wires. But you have to do
it by waving the wires around; there's no PPDAISY ioctl or anything
> Also, shouldn't there be some sort of indication about the product
> ID from the daisy-chain scan?
Yes, it should.
> Once I solve the problem of getting the chip to respond, I'd love to hear
> from anyone who has a good example driver that does byte-wide reads, but I'
> m getting ahead of myself now.
'Byte-wide reads' isn't specific enough: using what protocol?
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This archive was generated by hypermail 2b29 : Tue May 14 2002 - 04:26:59 EDT