I've compiled 2.4.3-ac9 with support for PNP BIOS. I understand that this
is a new feature experimental and the feedback is requested.
The setting is BIOS is to use irq 7 and dma 3. I normally use "options
parport_pc io=0x378 irq=7 dma=3" in /etc/modules.conf, but this time I
commented them out hoping that the driver will ask BIOS.
Although the kernel can see those settings, the dma is not used by the
driver. This is the output from dmesg.
PnPBIOS: Parport found PNPBIOS PNP0401 at io=0378,0778 irq=7 dma=-1
0x378: FIFO is 16 bytes
0x378: writeIntrThreshold is 7
0x378: readIntrThreshold is 7
0x378: PWord is 8 bits
0x378: Interrupts are ISA-Pulses
0x378: ECP port cfgA=0x10 cfgB=0x4b
0x378: ECP settings irq=7 dma=3
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: Printer, Canon BJC-1000
# cat /proc/dma
4: cascade
# cat /proc/interrupts
CPU0
0: 1323677 XT-PIC timer
1: 20176 XT-PIC keyboard
2: 0 XT-PIC cascade
3: 0 XT-PIC eth1
4: 288111 XT-PIC
7: 2 XT-PIC parport0
8: 1 XT-PIC rtc
12: 41138 XT-PIC eth0
14: 22503 XT-PIC ide0
15: 0 XT-PIC ide1
NMI: 0
ERR: 0
The full output is here: http://www.red-bean.com/~proski/linux/dmesg
First time parport_pc was loaded with the explicit options.
-- Regards, Pavel Roskin- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/