Re: PIIX4: DMA timeout issue

[gshan <gshan@alcatel-lucent.com>]

>> Another question is my PIIX4 chip has device ID + vendor ID of 
>> 0x71108086. But it finally
>> was mapped to following ID of piix_pci_tbl[] array. Device of 0x7110 and 
>> 0x7010 should
>> be quit different, right?
>>     
>
> Yes - I find tht one very odd - you might need to debug a bit to see what
> is occuring if you think this is the case.
>
> Alan
>   
Alan/Jeff, I tried to install ATA driver on PIIX4. After fixing IRQ number
to 143 for primary and secondary channel. I got following output and
it seems the driver has been loaded sucessfully. However, I couldn't
see any information from /proc/devices. Do you have any ideas?

piix_init: enter
piix_init_one: pci device: �[eh
piix_init_one: vendor=0x00008086, device=0x00007111
piix_init_one: piix_host_priv allocated
piix_init_one: ent->driver_data=0
ata_pci_init_one: n_ports=2
ata_pci_init_one: pci device enabled
ata_pci_init_one: pci device class=0x00010180
ata_pci_init_one: legacy_mode=8
ata_pci_init_one: DMA mode has been set
ata_pci_init_legacy_port: port_mask=0x0000000b
ata_pci_init_legacy_port: ATA_PRIMARY_CMD=0x000001f0, 
ATA_PRIMARY_CTL=0x000003f6
ata_pci_init_legacy_port: ATA_SECONDARY_CMD=0x00000170, 
ATA_SECONDARY_CTL=0x00000376
ata_pci_init_legacy_port: BMDMA=0xfbf00000
, phys=0x00001000, phys_end=0x0000100f
ata_pci_init_legacy_port: probe_ent initialized
ata_pci_init_legacy_port: IRQ line of primary channel is 143
ata_pci_init_legacy_port: IRQ line of secondary channel is 143
ata_pci_init_one: Master set
ata1: PATA max UDMA/33 cmd 0xfbeff1f0 ctl 0xfbeff3f6 bmdma 0xfbf00000 
irq 143
ata2: PATA max UDMA/33 cmd 0xfbeff170 ctl 0xfbeff376 bmdma 0xfbf00008 
irq 143
scsi0 : ata_piix
scsi1 : ata_piix
ata2.00: ATA-6: HTE721010G9AT00, MCZOA51A, max UDMA/100
ata2.00: 195371568 sectors, multi 0: LBA48
ata2.00: configured for UDMA/33
1:0:0:0: Direct-Access ATA HTE721010G9AT00 MCZO PQ: 0 ANSI: 5

/ $ cat /proc/devices
Character devices:
1 mem
2 pty
3 ttyp
4 /dev/vc/0
4 tty
5 /dev/tty
5 /dev/console
5 /dev/ptmx
7 vcs
10 misc
13 input
90 mtd
128 ptm
136 pts
204 ttyMM
205 ttyVC
206 ttySC
253 telica_sysinfo
254 mlba

Block devices:
1 ramdisk
7 loop
31 mtdblock

Gavin