Date: Wed, 23 Feb 2000 02:40:01 +0900 (JST) From: sakichan@lares.dti.ne.jp To: FreeBSD-gnats-submit@freebsd.org Subject: kern/16912: ATA66 support for Intel ICH Message-ID: <200002221739.CAA21478@shrike.dti.ad.jp>
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>Number: 16912
>Category: kern
>Synopsis: add UDMA4 mode for Intel ICH
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: change-request
>Submitter-Id: current-users
>Arrival-Date: Tue Feb 22 09:40:01 PST 2000
>Closed-Date:
>Last-Modified:
>Originator: SAKIYAMA Nobuo
>Release: FreeBSD 4.0-current i386
>Organization:
none
>Environment:
i386 systems on i810/820/840 chipsets platform,
with Ultra ATA66 hard disks.
>Description:
IDE controller in Intel 82801AA (ICH) can handle
ATA66 mode, but the current ATA driver does not
try to ATA66.
>How-To-Repeat:
Every boot on i386 systems on i810/820/840 chipsets platform,
with Ultra ATA66 hard disks connected to the IDE interface
on the motherboard wired to ICH by the ATA66 cable.
>Fix:
Patch below fix the problem. PCI Config register 0x54
is "IDE I/O Configuration Register". Bit 0-3 is the base
clock flag of each drive for UDMA timings. '1' means 66MHz,
and '0' means 33MHz. bit 4-7 is set/reset for each drive
by BIOS in the startup, which reports whether the ATA cable
is the 80-pin or the 40-pin.
--- src/sys/dev/ata/ata-dma.c-orig Sat Feb 19 05:57:29 2000
+++ src/sys/dev/ata/ata-dma.c Tue Feb 22 02:46:56 2000
@@ -96,9 +96,33 @@
switch (scp->chiptype) {
+ case 0x24118086: /* Intel ICH */
+ if (udmamode >= 4) {
+ int32_t mask48, new48, new54;
+
+ new54 = pci_read_config(parent, 0x54, 2);
+ if (new54 & ( 1<< (devno+4))) {
+ 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, "ICH setting up UDMA4 mode on %s chip\n",
+ (error) ? "failed" : "success");
+ if (!error) {
+ mask48 = (1 << devno) + (3 << (16 + (devno << 2)));
+ new48 = (1 << devno) + (2 << (16 + (devno << 2)));
+ pci_write_config(parent, 0x48,
+ (pci_read_config(parent, 0x48, 4) &
+ ~mask48) | new48, 4);
+ pci_write_config(parent, 0x54, new54 | (1 << devno), 2);
+ scp->mode[ATA_DEV(device)] = ATA_UDMA4;
+ return;
+ }
+ }
+ }
+ /* FALLTHROUGH */
+
case 0x71118086: /* Intel PIIX4 */
case 0x71998086: /* Intel PIIX4e */
- case 0x24118086: /* Intel ICH */
case 0x24218086: /* Intel ICH0 */
if (udmamode >= 2) {
int32_t mask48, new48;
>Release-Note:
>Audit-Trail:
>Unformatted:
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