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Subject[bk+patch] Support for UDMA133 on ICH2, ICH3 and C-ICH
ChangeSet@1.570, 2002-04-28 14:11:19+02:00, vojtech@twilight.ucw.cz
This patch adds experimental support for enabling UDMA133 modes even on
ICH2, ICH2-M, ICH3, ICH3-M, ICH3-S and C-ICH chips, which can support the 133 MB/sec
mode, even though the specs deny it. It's marked experimental, because it's beyond
the specs, and also not really tested yet.


Config.help | 9 +++++++++
Config.in | 3 +++
piix.c | 9 +++++++--
3 files changed, 19 insertions(+), 2 deletions(-)

diff -Nru a/drivers/ide/Config.help b/drivers/ide/Config.help
--- a/drivers/ide/Config.help Sun Apr 28 14:11:40 2002
+++ b/drivers/ide/Config.help Sun Apr 28 14:11:40 2002
@@ -431,6 +431,15 @@
the kernel to change PIO, DMA and UDMA speeds and to configure
the chip to optimum performance.

+CONFIG_BLK_DEV_PIIX_TRY133
+ The ICH2, ICH2-M, ICH3, ICH3-M, ICH3-S and CICH chips can support
+ UDMA133 in hardware, even though the specifications of the chips
+ say otherwise. By enabling this option, you allow the driver to
+ enable the UDMA133 mode on these chips.
+
+ If you want to stay on the safe side, say N here.
+ If you prefer maximum performance, say Y here.
+
CONFIG_BLK_DEV_PDC202XX
Promise Ultra33 or PDC20246
Promise Ultra66 or PDC20262
diff -Nru a/drivers/ide/Config.in b/drivers/ide/Config.in
--- a/drivers/ide/Config.in Sun Apr 28 14:11:40 2002
+++ b/drivers/ide/Config.in Sun Apr 28 14:11:40 2002
@@ -61,6 +61,9 @@
dep_mbool ' HPT34X AUTODMA support (WIP)' CONFIG_HPT34X_AUTODMA $CONFIG_BLK_DEV_HPT34X $CONFIG_IDEDMA_PCI_WIP
dep_bool ' HPT366 chipset support' CONFIG_BLK_DEV_HPT366 $CONFIG_BLK_DEV_IDEDMA_PCI
dep_bool ' Intel and Efar (SMsC) chipset support' CONFIG_BLK_DEV_PIIX $CONFIG_BLK_DEV_IDEDMA_PCI
+ if [ "$CONFIG_BLK_DEV_PIIX" = "y" ]; then
+ dep_bool ' Use UDMA133 even on ICH2, ICH3 and CICH chips (EXPERIMENTAL)' CONFIG_BLK_DEV_PIIX_TRY133 $CONFIG_EXPERIMENTAL
+ fi
if [ "$CONFIG_MIPS_ITE8172" = "y" -o "$CONFIG_MIPS_IVR" = "y" ]; then
dep_mbool ' IT8172 IDE support' CONFIG_BLK_DEV_IT8172 $CONFIG_BLK_DEV_IDEDMA_PCI
dep_mbool ' IT8172 IDE Tuning support' CONFIG_IT8172_TUNING $CONFIG_BLK_DEV_IT8172 $CONFIG_IDEDMA_PCI_AUTO
diff -Nru a/drivers/ide/piix.c b/drivers/ide/piix.c
--- a/drivers/ide/piix.c Sun Apr 28 14:11:40 2002
+++ b/drivers/ide/piix.c Sun Apr 28 14:11:40 2002
@@ -69,6 +69,11 @@
#define PIIX_CHECK_REV 0x40 /* May be a buggy revision of PIIX */
#define PIIX_NODMA 0x80 /* Don't do DMA with this chip */

+#ifdef CONFIG_BLK_DEV_PIIX_TRY133 /* I think even the older ICHs should be able to do UDMA133 */
+#undef PIIX_UDMA_100
+#define PIIX_UDMA_100 PIIX_UDMA_133
+#endif
+
/*
* Intel IDE chips
*/
@@ -78,7 +83,7 @@
unsigned char flags;
} piix_ide_chips[] = {
{ PCI_DEVICE_ID_INTEL_82801DB_9, PIIX_UDMA_133 | PIIX_PINGPONG }, /* Intel 82801DB ICH4 */
- { PCI_DEVICE_ID_INTEL_82801CA_11, PIIX_UDMA_100 | PIIX_PINGPONG }, /* Intel 82801CA ICH3 */
+ { PCI_DEVICE_ID_INTEL_82801CA_11, PIIX_UDMA_100 | PIIX_PINGPONG }, /* Intel 82801CA ICH3/ICH3-S */
{ PCI_DEVICE_ID_INTEL_82801CA_10, PIIX_UDMA_100 | PIIX_PINGPONG }, /* Intel 82801CAM ICH3-M */
{ PCI_DEVICE_ID_INTEL_82801E_9, PIIX_UDMA_100 | PIIX_PINGPONG }, /* Intel 82801E C-ICH */
{ PCI_DEVICE_ID_INTEL_82801BA_9, PIIX_UDMA_100 | PIIX_PINGPONG }, /* Intel 82801BA ICH2 */
@@ -87,7 +92,7 @@
{ PCI_DEVICE_ID_INTEL_82801AA_1, PIIX_UDMA_66 | PIIX_PINGPONG }, /* Intel 82801AA ICH */
{ PCI_DEVICE_ID_INTEL_82372FB_1, PIIX_UDMA_66 }, /* Intel 82372FB PIIX5 */
{ PCI_DEVICE_ID_INTEL_82443MX_1, PIIX_UDMA_33 }, /* Intel 82443MX MPIIX4 */
- { PCI_DEVICE_ID_INTEL_82371AB, PIIX_UDMA_33 }, /* Intel 82371AB/EB PIIX4/4E */
+ { PCI_DEVICE_ID_INTEL_82371AB, PIIX_UDMA_33 }, /* Intel 82371AB/EB PIIX4/PIIX4E */
{ PCI_DEVICE_ID_INTEL_82371SB_1, PIIX_UDMA_NONE }, /* Intel 82371SB PIIX3 */
{ PCI_DEVICE_ID_INTEL_82371FB_1, PIIX_UDMA_NONE | PIIX_NO_SITRE | PIIX_CHECK_REV }, /* Intel 82371FB PIIX */
{ PCI_DEVICE_ID_EFAR_SLC90E66_1, PIIX_UDMA_66 | PIIX_VICTORY }, /* Efar Victory66 */
===================================================================

This BitKeeper patch contains the following changesets:
+
## Wrapped with gzip_uu ##


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`
end
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