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SubjectRe: UDMA trouble in VT82C586 IDE

Hi Cesar,

All Vojtech has to do is accept responsiblity for the chipset code.
I mean all flavors of the bastardization of the design.
This includes the ones that you can change the chipset reporting type if
you know the dirty-secrets. The problem is that some mainboard
manufacturers alter the PCI ID codes to fake compatablity.

Now if your board is one of these boards, then I would expect it to not
work.

On Sat, 26 Aug 2000, Cesar Eduardo Barros wrote:

>
> It works great now. I got a month-old full rewrite of via82cxxx.c from
> Vojtech Pavlik in the lkml archives and compiled it.
>
> Linus: I think it should be included. The old driver is messy, hairy, and fails
> to work here. The new one is clean, neat, and works fine. If you lost the

Just because you have a newer wierder combination does not mean the old
and lousy is junk.

Again, if Vojtech will put it on the line that compatablity/support is
better go for it. In the past Vojtech was not ready to jump on this and
run. I have one, and only one, completely corrupted drive, beyond
recovery by any means, because of one incomplete thought in the design.

I will not accept this happenning again.

> message I can send you the copy of the driver I got here.
>
> Uniform Multi-Platform E-IDE driver Revision: 6.31
> ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> VP_IDE: IDE controller on PCI bus 00 dev 39
> VP_IDE: chipset revision 6
> VP_IDE: not 100% native mode: will probe irqs later
> VP_IDE: VIA vt82c686a IDE UDMA66 controller on pci0:7.1
> ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:DMA, hdb:pio
> ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:pio, hdd:pio
> hda: ST320423A, ATA DISK drive
> ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> hdc: CR-2802TE, ATAPI CDROM drive
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> ide1 at 0x170-0x177,0x376 on irq 15
> hda: 40011300 sectors (20486 MB) w/512KiB Cache, CHS=2490/255/63, UDMA(66)
> Partition check:
> hda: hda1
>
> /proc/ide$ cat via
> ----------VIA BusMastering IDE Configuration-----------------
> Command register: 0x7
> Latency timer: 32
> Master Read Cycle IRDY: 0ws
> Master Write Cycle IRDY: 0ws
> FIFO Output Data 1/2 Clock Advance: off
> BM IDE Status Register Read Retry: on
> Max DRDY Pulse Width: No limit
> -----------------------Primary IDE-------Secondary IDE-------
> Read DMA FIFO flush: on on
> End Sect. FIFO flush: on on
> Prefetch Buffer: on on
> Post Write Buffer: on on
> FIFO size: 8 8
> Threshold Prim.: 1/2 1/2
> Bytes Per Sector: 512 512
> Both channels togth: yes yes
> -------------------drive0----drive1----drive2----drive3-----
> BMDMA enabled: yes no no no
> Transfer Mode: UDMA DMA/PIO DMA/PIO DMA/PIO
> Cycle (T): 15ns 30ns 30ns 30ns
> Address Setup: --- 3T 2T 4T
> Active Pulse: --- 11T 4T 11T
> Recovery Time: --- 9T 2T 9T
> Cycle Time: 2T 23T 8T 24T
> Transfer Rate: 66.0MB/s 2.8MB/s 8.2MB/s 2.7MB/s
>
> --
> Cesar Eduardo Barros
> cesarb@nitnet.com.br
> cesarb@dcc.ufrj.br
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
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> Please read the FAQ at http://www.tux.org/lkml/
>

Andre Hedrick
The Linux ATA/IDE guy


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