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v0.8.1
https://github.com/torvalds/linux
02 December 2023, 22:23:51 UTC
Revision 9448732f6c9ef4932b226056338d1084f3669752 authored by Sergei Shtylyov on 13 December 2006, 08:35:49 UTC, committed by Linus Torvalds on 13 December 2006, 17:05:55 UTC 
[PATCH] ide: fix HPT37x timing tables
 
Fix/remove bad/unused timing tables: HPT370/A 66 MHz tables weren't really
needed (the chips are not UltraATA/133 capable and shouldn't support 66 MHz
PCI) and had many modes over- and underclocked, HPT372 33 MHz table was in
fact for 66 MHz and 50 MHz table missed UltraDMA mode 6, HPT374 33 MHz table
was really for 50 MHz...  (Actually, HPT370/A 33 MHz tables also have issues.
e.g.  HPT370 has PIO modes 0/1 overlocked.)

There's also no need in the separate HPT374 tables because HPT372 timings
should be the same (and those tables has UltraDMA mode 6 which HPT374 supports
depending on HPT374_ALLOW_ATA133_6 #define)...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
1 parent 836c006
Raw File
Tip revision: 9448732f6c9ef4932b226056338d1084f3669752 authored by Sergei Shtylyov on 13 December 2006, 08:35:49 UTC
[PATCH] ide: fix HPT37x timing tables
Tip revision: 9448732
ohci.txt 
23-Aug-2002

The "ohci-hcd" driver is a USB Host Controller Driver (HCD) that is derived
from the "usb-ohci" driver from the 2.4 kernel series.  The "usb-ohci" code
was written primarily by Roman Weissgaerber <weissg@vienna.at> but with
contributions from many others (read its copyright/licencing header).

It supports the "Open Host Controller Interface" (OHCI), which standardizes
hardware register protocols used to talk to USB 1.1 host controllers.  As
compared to the earlier "Universal Host Controller Interface" (UHCI) from
Intel, it pushes more intelligence into the hardware.  USB 1.1 controllers
from vendors other than Intel and VIA generally use OHCI.

Changes since the 2.4 kernel include

	- improved robustness; bugfixes; and less overhead
	- supports the updated and simplified usbcore APIs
	- interrupt transfers can be larger, and can be queued
	- less code, by using the upper level "hcd" framework
	- supports some non-PCI implementations of OHCI
	- ... more

The "ohci-hcd" driver handles all USB 1.1 transfer types.  Transfers of all
types can be queued.  That was also true in "usb-ohci", except for interrupt
transfers.  Previously, using periods of one frame would risk data loss due
to overhead in IRQ processing.  When interrupt transfers are queued, those
risks can be minimized by making sure the hardware always has transfers to
work on while the OS is getting around to the relevant IRQ processing.

- David Brownell
  <dbrownell@users.sourceforge.net>
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