linux-kernel - [PATCH pata-2.6 fix] hpt366: disallow Ultra133 for HPT374

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Date:	Wed, 6 Jun 2007 23:53:28 +0400
From:	Sergei Shtylyov <sshtylyov@...mvista.com>
To:	bzolnier@...il.com, wildy@...ra.hos.u-szeged.hu
Cc:	linux-ide@...r.kernel.org, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH pata-2.6 fix] hpt366: disallow Ultra133 for HPT374

Eliminate UltraATA/133 support for HPT374 -- the chip isn't capable of this mode
according to the manual, and doesn't even seem to tolerate 66 MHz DPLL clock...

Signed-off-by: Sergei Shtylyov <sshtylyov@...mvista.com>

---
 drivers/ide/pci/hpt366.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

Index: linux-2.6/drivers/ide/pci/hpt366.c
===================================================================
--- linux-2.6.orig/drivers/ide/pci/hpt366.c
+++ linux-2.6/drivers/ide/pci/hpt366.c
@@ -1,5 +1,5 @@
 /*
- * linux/drivers/ide/pci/hpt366.c		Version 1.03	May 4, 2007
+ * linux/drivers/ide/pci/hpt366.c		Version 1.04	Jun 4, 2007
  *
  * Copyright (C) 1999-2003		Andre Hedrick <andre@...ux-ide.org>
  * Portions Copyright (C) 2001	        Sun Microsystems, Inc.
@@ -106,7 +106,8 @@
  *   switch  to calculating  PCI clock frequency based on the chip's base DPLL
  *   frequency
  * - switch to using the  DPLL clock and enable UltraATA/133 mode by default on
- *   anything  newer than HPT370/A
+ *   anything  newer than HPT370/A (except HPT374 that is not capable of this
+ *   mode according to the manual)
  * - fold PCI clock detection and DPLL setup code into init_chipset_hpt366(),
  *   also fixing the interchanged 25/40 MHz PCI clock cases for HPT36x chips;
  *   unify HPT36x/37x timing setup code and the speedproc handlers by joining
@@ -365,7 +366,6 @@ static u32 sixty_six_base_hpt37x[] = {
 };
 
 #define HPT366_DEBUG_DRIVE_INFO		0
-#define HPT374_ALLOW_ATA133_6		1
 #define HPT371_ALLOW_ATA133_6		1
 #define HPT302_ALLOW_ATA133_6		1
 #define HPT372_ALLOW_ATA133_6		1
@@ -450,7 +450,7 @@ static struct hpt_info hpt370a __devinit
 
 static struct hpt_info hpt374 __devinitdata = {
 	.chip_type	= HPT374,
-	.max_mode	= HPT374_ALLOW_ATA133_6 ? 4 : 3,
+	.max_mode	= 3,
 	.dpll_clk	= 48,
 	.settings	= hpt37x_settings
 };

-
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