Greg Lehey wrote:
> On Saturday, 1 December 2001 at 13:05:53 +0100, Søren Schmidt wrote:
>
>>It seems Zwane Mwaikambo wrote:
>>
>>>Hi,
>>> I've got a box which boots up with UDMA33 but during the boot
>>>sequence gets write problems and ends up disabling it and i presume
>>>falling back to PIO4. I've tested the same box on Linux 2.4.2+ and have
>>>had no problems running it at UDMA33.
>>>
>>>Host: SiS 5591 (revision?)
>>>Disk: Seagate 3.2G ATA2
>>>
>>Ohhh, I need alot more info before I can tell whats going on..
>>I need at least the dmesg from a verbosely booted system and
>>also a pciconf -l to tell what chips you have.
>>
>
> Note that there are other chips out there which return the same PCI
> information but which appear to be capable of ATA 100. I recently
> gave a patch to Richard Sharpe (copied) which he says was able to get
> his "SiS 5591" to run at ATA 100. I'm still waiting for feedback from
> him before forwarding it to you. I also have a machine with a "SiS
> 5591" which can't go beyond ATA 33. Here are the pciconf outputs for
> each chip:
>
> Mine (ATA 33):
>
> atapci0@pci0:0:1: class=0x01018a card=0x00000000 chip=0x55131039 rev=0xd0
>hdr=0x00
>
> Richard's (ATA 100):
> pci0:0:1 Class=0x010180 card=0x55131039 chip=0x55131039 red=0xd0
>hdr=0x00
>
> Dwayne's:
>
> atapci0@pci0:0:1: class=0x010180 card=0x55131039 chip=0x55131039 rev=0xd0
>hdr=0x00
>
> I don't understand why Richard's output is missing the atapci@ at the
> beginning. I believe he was using 4.3-RELEASE at this point; mine was
> from 4-STABLE of May this year.
Here is what pciconf gives me:
atapci0@pci0:0:1: class=0x010180 card=0x55131039 chip=0x55131039
rev=0xd0 hdr=0x00
Attached is the patch I am using, which is based on what Greg gave me.
It tries UDMA5 first, and steps down ...
--
Richard Sharpe, [EMAIL PROTECTED], LPIC-1
www.samba.org, www.ethereal.com, SAMS Teach Yourself Samba
in 24 Hours, Special Edition, Using Samba
--- ata-dma.c.orig Wed Oct 31 07:29:52 2001
+++ ata-dma.c Fri Nov 30 14:38:52 2001
@@ -519,30 +519,61 @@
break;
case 0x55131039: /* SiS 5591 */
- if (udmamode >= 2 && pci_get_revid(parent) > 0xc1) {
- error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
- ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
- if (bootverbose)
- ata_printf(scp, device,
- "%s setting UDMA2 on SiS chip\n",
- (error) ? "failed" : "success");
- if (!error) {
- pci_write_config(parent, 0x40 + (devno << 1), 0xa301, 2);
- scp->mode[ATA_DEV(device)] = ATA_UDMA2;
- return;
+ if (bootverbose)
+ printf ("SiS 5513/5591, udmamode %d\n", udmamode);
+ if (pci_get_revid(parent) > 0xc1) {
+ udmamode = 5; /* Force it to 100 */
+ if (udmamode >= 5) { /* Claims UDMA 100 */
+ error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
+ ATA_UDMA5, ATA_C_F_SETXFER, ATA_WAIT_READY);
+ if (bootverbose)
+ ata_printf(scp, device,
+ "%s setting UDMA5 on SiS chip\n",
+ (error) ? "failed" : "success");
+ if (!error) {
+ pci_write_config(parent, 0x40 + (devno << 1), 0xa301, 2);
+ scp->mode[ATA_DEV(device)] = ATA_UDMA5;
+ return;
+ }
}
- }
- if (wdmamode >=2 && apiomode >= 4) {
- error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
- ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
- if (bootverbose)
- ata_printf(scp, device,
- "%s setting WDMA2 on SiS chip\n",
- (error) ? "failed" : "success");
- if (!error) {
- pci_write_config(parent, 0x40 + (devno << 1), 0x0301, 2);
- scp->mode[ATA_DEV(device)] = ATA_WDMA2;
- return;
+ if (udmamode >= 4) { /* Claims UDMA 66 */
+ error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
+ ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
+ if (bootverbose)
+ ata_printf(scp, device,
+ "%s setting UDMA4 on SiS chip\n",
+ (error) ? "failed" : "success");
+ if (!error) {
+ pci_write_config(parent, 0x40 + (devno << 1), 0xa301, 2);
+ scp->mode[ATA_DEV(device)] = ATA_UDMA4;
+ return;
+ }
+ }
+ if (udmamode >= 2) {
+ error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
+ ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
+ if (bootverbose)
+ ata_printf(scp, device,
+ "%s setting UDMA2 on SiS chip\n",
+ (error) ? "failed" : "success");
+ if (!error) {
+ pci_write_config(parent, 0x40 + (devno << 1), 0xa301, 2);
+ scp->mode[ATA_DEV(device)] = ATA_UDMA2;
+ return;
+ }
+ }
+ if (wdmamode >=2 && apiomode >= 4) {
+ error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
+ ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
+ if (bootverbose)
+ ata_printf(scp, device,
+ "%s setting WDMA2 on SiS chip\n",
+ (error) ? "failed" : "success");
+ if (!error) {
+ pci_write_config(parent, 0x40 + (devno << 1), 0x0301, 2);
+ scp->mode[ATA_DEV(device)] = ATA_WDMA2;
+ return;
+ }
}
}
/* we could set PIO mode timings, but we assume the BIOS did that */
