Messages in this thread | | | From | Andrey Borzenkov <> | Subject | parport_pc does not enable DMA by default (both 2.5.72 and 2.4.21) | Date | Wed, 18 Jun 2003 23:26:54 +0400 |
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I have CUSL2 motherboard (i815e based) that allows to select different parallel port modes; for ECP or ECP+EPP I also can choose DMA channel.
Neither 2.4.21 nor 2.5.72 would enable DMA by default. I have (currently ECP but the same for ECP_EPP)
parport0: PC-style at 0x378 (0x778), irq 7, using FIFO [PCSPP,TRISTATE,COMPAT,ECP] parport0: cpp_daisy: aa5500ff(38) parport0: assign_addrs: aa5500ff(38) parport0: cpp_daisy: aa5500ff(38) parport0: assign_addrs: aa5500ff(38)
and as options
{pts/1}% grep parport /etc/modprobe.conf options parport_pc irq=auto dma=auto
IRQ is correctly autodeteted and it appears it is also correctly configured in BIOS:
{pts/1}% cat /sys/devices/pnp0/00:01/name ECP printer port {pts/1}% cat /sys/devices/pnp0/00:01/resources mode = auto state = active io 0x378-0x37f io 0x778-0x77f irq 7 dma 3
Is it expected? Any additional info I can provide?
TIA
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