Messages in this thread | | | Date | Wed, 21 Mar 2001 19:41:15 -0700 | From | TimO <> | Subject | Re: VIA audio and parport in 2.4.2 |
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Tim Waugh wrote: > > On Wed, Mar 21, 2001 at 09:19:35AM -0500, Jeff Garzik wrote: > > > Attempting to pretend that the parallel port is not in an interrupt > > driven mode by passing irq=none is folly. > > No, that's not what it's for. It means 'for Christ sake don't use > interrupts, I know what I'm doing'. > > > If irq=none is passed to tell the Via code to -force- the parallel > > port into a non-irq-driven mode is one thing. If irq=none is passed > > to hide a problem with spurious interrupts, we need to fix that > > problem, not hide it. > > irq=none is passed in order to diagnose whether a problem happens on > only the interrupt-driven path or not. Read the trouble-shooting > section parport.txt. Understand that there are lots of printing code > paths nowadays (polling, interrupt-driven, PIO, DMA, etc). > > > I still am not convinced that irq=<anything> should affect the Via > > code at all. Maybe I can print out a message "irq=foo ignored". > > Jeff, it needs to. If you want to make irq=auto the default > (currently it's 'probe only'), then that is an entirely different > thing. > > When the user tells you not to use interrupts, you'd better not. > > > Optionally, I could handle irq=none by force-disabling the parallel > > port's interrupt driven modes, if they are active. > > What the hell for? Just don't use the interrupts. > > Tim. > */ >
Hi, Tim
What is the default anyway? My BIOS is 0x378, 7, 3 and the driver reports this:
0x378: FIFO is 16 bytes 0x378: writeIntrThreshold is 8 0x378: readIntrThreshold is 8 0x378: PWord is 8 bits 0x378: Interrupts are ISA-Pulses 0x378: possible IRQ conflict! [Don't know why it always reports this] 0x378: ECP port cfgA=0x10 cfgB=0x00 0x378: ECP settings irq=<none or set by other means> dma=<none or set by other means> parport0: PC-style at 0x378 (0x778), irq 7, using FIFO [PCSPP,TRISTATE,COMPAT,ECP] parport0: cpp_daisy: aa5500ff(98) parport0: assign_addrs: aa5500ff(98) parport0: cpp_daisy: aa5500ff(98) parport0: assign_addrs: aa5500ff(98)
With no options in modules.conf, lp0 uses polling; with irq=auto dma=auto it uses interrupt-driven but no dma?.
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