LKML: Andre Hedrick: Re: IDE UDMA on a CMD-648 Chip

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On Fri, 16 Mar 2001, John Heil wrote:

>
> I've acquired a UDMA66 capable IDE card with a CMD-648 chip,
> which is supposed to provide me with ide2 and ide3.
>
> ide2 is empty and ide3 has a writeable cdrom and an IDE zip
> drive on it.
>
> At boot up, the card's bios scan recognizes the cdrom and zip
> as master and slave on its secondary ide i/f, which is correct.
>
> However, it indicates that since it...
> 'Can't find a UDMA66 capable device'
> it is
> 'Disabling the UDMA66 bios'.
>
> I've done the usual append for ide3, in lilo.conf but w/o benefit.
>
> Kernel is currently 2.2.16,
> The mobo is an Asus A7V133 and the CPU is an 1.1 Athlon
> South bridge is a via 686b which runs fine at UDMA100 on a
> pair of Maxtors on IDE-0.
>
> I'll be upgrading this machine to 2.4.n-whatever in about 3 wks but...
> ...I'd like to get the 2 devices operational on this or
> some other 2.2.x, before that, if I can.
>
> I can't find the chip's datasheet. CMD only gives it to direct customers.
> I do have the datasheet for the CMD-646U, a prior UDMA supporting chip.
>
> I take this to be a bug in the on-card Bios.
>
> I am hoping to circumvent the bios. I assume it will involve some
> measure of IDE initialization which I don't mind coding if
> it does not exist yet.
>
>
> So has anyone encountered this chip yet and
> are there any existing solutions or suggestions.
>
>
> Thanx much
>
>
> The CMD-648 chip's vital statistics follow...
>
> root@scsoftware50:~# lspci -vvxxxs 00:0c.0
> 00:0c.0 RAID bus controller: CMD Technology Inc PCI0648 (rev 01)
> Subsystem: CMD Technology Inc PCI0648
> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR- FastB2B-
> Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
> <TAbort- <MAbort- >SERR- <PERR-
> Latency: 32 (500ns min, 1000ns max)
> Interrupt: pin A routed to IRQ 11
> Region 0: I/O ports at 9400
> Region 1: I/O ports at 9000
> Region 2: I/O ports at 8800
> Region 3: I/O ports at 8400
> Region 4: I/O ports at 8000
> Capabilities: [60] Power Management version 1
> Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA
> PME(D0-,D1-,D2-,D3hot-,D3cold-)
> Status: D0 PME-Enable- DSel=0 DScale=3 PME-
> 00: 95 10 48 06 07 00 90 02 01 00 04 01 00 20 00 00
> 10: 01 94 00 00 01 90 00 00 01 88 00 00 01 84 00 00
> 20: 01 80 00 00 00 00 00 00 00 00 00 00 95 10 48 06
> 30: 00 00 00 00 60 00 00 00 00 00 00 00 0b 01 02 04
> 40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02
> 50: 40 ec 00 c0 00 c0 00 dc 32 40 00 00 00 00 00 00
> 60: 01 00 21 06 00 60 00 f0 00 00 00 00 00 00 00 00
> 70: 00 08 00 f0 94 0a 00 00 00 82 00 f0 c8 01 48 2a
> 80: 00 00 00 00 00 00 00 00 00 00 00 00 95 10 48 06
> 90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>
>
>
> -----------------------------------------------------------------
> John Heil
> South Coast Software
> Custom systems software for UNIX and IBM MVS mainframes
> 1-714-774-6952
> johnhscs@sc-software.com
> http://www.sc-software.com
> -----------------------------------------------------------------
>
>
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>

Andre Hedrick
Linux ATA Development
ASL Kernel Development
-----------------------------------------------------------------------------
ASL, Inc. Toll free: 1-877-ASL-3535
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