Add the unhide_ICH_SMBus script

git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@4283 7894878c-1315-0410-8ee3-d5d059ff63e0

CHANGES

@@ -25,6 +25,8 @@ SVN HEAD
   Program eepromer: Fix loads of warnings
   Program i2cdetect: Make the output clearer
   Program py-smbus: New! Python i2c-dev bindings (prog/py-smbus)
+  Program unhide_ICH_SMBus: New! Unhides the ICH SMBus even for 2.6 kernels
+                            without need of recompilation.
   Programs dump/*: More robust handling of user inputs
   Programs pwmconfig, fancontrol: Handle write errors for bash 3.1
   Program sensord: Add pc87247 support (fans only)

doc/progs

@@ -90,6 +90,9 @@ see useful_addresses.html.
   on Asus P4B boards.
   See prog/hotplug/README.p4b for details.
 
+* prog/hotplug/unhide_ICH_SMBus (shell script, not installed)
+  It unhides the ICH Intel SMBus for 2.6 kernels
+
 * prog/init/lm_sensors.init (shell script, not installed)
   A SysV init script to be installed in /etc/rc.d/init.d/
   It inserts the bus and chip modules.

prog/hotplug/README

@@ -1,14 +1,16 @@
-M7101 - SMBus Support for ALi M15x3 based motherboards.
-For Asus P4B motherboards, use the p4b_smbus module;
-see the file README.p4b.
+Files in this directory:
 
-NOTE:
-This module is for 2.4 kernels only. For 2.6 kernels,
-activation is handled by the code in drivers/pci/quirks.c
-in the kernel source. If you have the latest 2.6 kernel and
-the quirks code does not activate your SMBus, try adding support
-in quirks.c, recompile and test your new kernel, and then
-submit a patch to us. Contact us if you need assistance.
+* m7101.c
+  M7101 - SMBus Support for ALi M15x3 based motherboards.
+
+* README.p4b
+  More detailed information for files below.
+
+* p4b_smbus.c
+  2.4 Kernel module which unhides the bus for ASUS boards.
+  
+* unhide_ICH_SMBus
+  Script which unhides the bus for 2.6 kernel.
 
 --------------------------------------------------------
 Quick Start (2.4 kernels only):

prog/hotplug/README.p4b

@@ -1,18 +1,10 @@
 What is it?
 -----------
 
-NOTE:
-This module is for 2.4 kernels only. For 2.6 kernels,
-activation is handled by the code in drivers/pci/quirks.c
-in the kernel source. If you have the latest 2.6 kernel and
-the quirks code does not activate your SMBus, try adding support
-in quirks.c, recompile and test your new kernel, and then
-submit a patch to us. Contact us if you need assistance.
+It unhides the SMBus of Intel ICH southbridges hidden
+on ASUS P4B series. It is implemented as a module (p4b_smbus.o),
+or a shell script for the 2.6 kernel (unhide_ICH_SMBus).
 
-This is just a quick and dirty hack to get the hardware monitoring working
-on the ASUS P4B board under Linux.
-It works by turning on the SMBus PCI device.
-It is implemented as a module, p4b_smbus.o.
 It works with the following chips:
  * ICH2   (82801BA)
  * ICH2-M (82801BAM)
@@ -25,6 +17,24 @@ with the German support and learned that: "We do not want the users to be
 irritated by just another PCI Device in the Win98 device manager."
 Really funny :-).
 
+This module is for 2.4 kernels only. For 2.6 kernels, activation is
+handled by the code in drivers/pci/quirks.c in the kernel source. If you
+have the 2.6 kernel and the quirks code does not activate your SMBus,
+you may:
+
+ * check if you have kernel version from 2.6.17 to 2.6.19
+   If so you, need to disable ACPI sleep support and recompile kernel. 
+   If you don't use suspend try below instead of recompilation.
+
+ * run as root the ./unhide_ICH_SMBus script. It will unhide the bus 
+   and load the i2c-i801 driver.
+
+ * if above script works and you have latest kernel, you may 
+   try to fix the quirks.c, recompile and test your new kernel,
+   and then submit a patch to us. Contact us if you need assistance.
+
+Information for 2.4 users continues below.
+
 NOTE: As of kernel 2.4.23, the kernel activates the SMBus PCI device
 on the following boards:
  * Asus P4B
@@ -35,7 +45,6 @@ on the following boards:
 So this module is no longer required for these boards. For the other 
 affected boards, it still is.
 
-
 What does the module do?
 ------------------------
 (Note: the following instructions assume the ICH2. For the ICH4,

prog/hotplug/unhide_ICH_SMBus

@@ -0,0 +1,39 @@
+#!/bin/bash
+# (C) Rudolf Marek <r.marek@assembler.cz>,
+#     Jean Delvare <khali@linux-fr.org>
+#
+#    Thanks Jean Delvare and Oliver Dreier <oliver@dinux.de> for testing.
+#
+#    This program is free software; you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License version 2
+#    as published by the Free Software Foundation
+
+pcibus="/sys/bus/pci/slots/"
+device="00:1f"
+
+intel=`lspci -n -s $device.0 | grep 8086`
+
+if [ -z "$intel" ] ; then
+	echo "Not for your chipset - Intel (ICH) only"
+	exit 255;
+fi
+modprobe fakephp &> /dev/null
+
+if [ ! -d "$pcibus" ] ; then
+	echo "You need the fake PCI hotplug driver! (fakephp.ko and 2.6 kernel)"
+	exit 255;
+fi
+
+echo "Enabling SMBus PCI device ..."
+
+newval=$( printf '%x' $((0x$(setpci -s $device.0 f2.w) & 0xfff7))) 
+setpci -s $device.0 f2.w=$newval
+
+echo "Rescanning the bus ..."
+echo 1 > $pcibus/0000:$device.0/power 2>/dev/null
+if [ ! -d "$pcibus/0000:$device.3" ] ; then
+	echo "Failed to enable the SMBUS"
+	exit 253;
+fi
+echo "Done, loading i2c-i801 ..."
+modprobe i2c-i801  &> /dev/null