hwmon: Add support for newer uGuru's

This patch adds a new driver for the hardware monitoring features of the
third revision of the Abit uGuru chip, found on recent Abit
motherboards. This is an entirely different beast then the first and
second revision (its again a winbond microcontroller, but the "protocol"
to talk to it and the bank addresses are very different.

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>

Documentation/hwmon/abituguru

@@ -2,7 +2,7 @@ Kernel driver abituguru
 =======================
 
 Supported chips:
-  * Abit uGuru revision 1-3 (Hardware Monitor part only)
+  * Abit uGuru revision 1 & 2 (Hardware Monitor part only)
     Prefix: 'abituguru'
     Addresses scanned: ISA 0x0E0
     Datasheet: Not available, this driver is based on reverse engineering.
@@ -20,8 +20,8 @@ Supported chips:
 	uGuru 2.1.0.0 ~ 2.1.2.8 (AS8, AV8, AA8, AG8, AA8XE, AX8)
 	uGuru 2.2.0.0 ~ 2.2.0.6 (AA8 Fatal1ty)
 	uGuru 2.3.0.0 ~ 2.3.0.9 (AN8)
-	uGuru 3.0.0.0 ~ 3.0.1.2 (AW8, AL8, NI8)
-	uGuru 4.xxxxx?          (AT8 32X) (2)
+	uGuru 3.0.0.0 ~ 3.0.x.x (AW8, AL8, AT8, NI8 SLI, AT8 32X, AN8 32X,
+				 AW9D-MAX) (2)
 	1) For revisions 2 and 3 uGuru's the driver can autodetect the
 	   sensortype (Volt or Temp) for bank1 sensors, for revision 1 uGuru's
 	   this doesnot always work. For these uGuru's the autodection can
@@ -30,8 +30,9 @@ Supported chips:
 	   bank1_types=1,1,0,0,0,0,0,2,0,0,0,0,2,0,0,1
 	   You may also need to specify the fan_sensors option for these boards
 	   fan_sensors=5
-	2) The current version of the abituguru driver is known to NOT work
-	   on these Motherboards
+	2) There is a seperate abituguru3 driver for these motherboards,
+	   the abituguru (without the 3 !) driver will not work on these
+	   motherboards (and visa versa)!
 
 Authors:
 	Hans de Goede <j.w.r.degoede@hhs.nl>,
@@ -43,8 +44,10 @@ Module Parameters
 -----------------
 
 * force: bool		Force detection. Note this parameter only causes the
-			detection to be skipped, if the uGuru can't be read
-			the module initialization (insmod) will still fail.
+			detection to be skipped, and thus the insmod to
+			succeed. If the uGuru can't be read the actual hwmon
+			driver will not load and thus no hwmon device will get
+			registered.
 * bank1_types: int[]	Bank1 sensortype autodetection override:
 			  -1 autodetect (default)
 			   0 volt sensor
@@ -69,13 +72,15 @@ dmesg | grep abituguru
 Description
 -----------
 
-This driver supports the hardware monitoring features of the Abit uGuru chip
-found on Abit uGuru featuring motherboards (most modern Abit motherboards).
+This driver supports the hardware monitoring features of the first and
+second revision of the Abit uGuru chip found on Abit uGuru featuring
+motherboards (most modern Abit motherboards).
 
-The uGuru chip in reality is a Winbond W83L950D in disguise (despite Abit
-claiming it is "a new microprocessor designed by the ABIT Engineers").
-Unfortunatly this doesn't help since the W83L950D is a generic
-microcontroller with a custom Abit application running on it.
+The first and second revision of the uGuru chip in reality is a Winbond
+W83L950D in disguise (despite Abit claiming it is "a new microprocessor
+designed by the ABIT Engineers"). Unfortunatly this doesn't help since the
+W83L950D is a generic microcontroller with a custom Abit application running
+on it.
 
 Despite Abit not releasing any information regarding the uGuru, Olle
 Sandberg <ollebull@gmail.com> has managed to reverse engineer the sensor part

Documentation/hwmon/abituguru3

@@ -0,0 +1,65 @@
+Kernel driver abituguru3
+========================
+
+Supported chips:
+  * Abit uGuru revision 3 (Hardware Monitor part, reading only)
+    Prefix: 'abituguru3'
+    Addresses scanned: ISA 0x0E0
+    Datasheet: Not available, this driver is based on reverse engineering.
+    Note:
+	The uGuru is a microcontroller with onboard firmware which programs
+	it to behave as a hwmon IC. There are many different revisions of the
+	firmware and thus effectivly many different revisions of the uGuru.
+	Below is an incomplete list with which revisions are used for which
+	Motherboards:
+	uGuru 1.00    ~ 1.24    (AI7, KV8-MAX3, AN7)
+	uGuru 2.0.0.0 ~ 2.0.4.2 (KV8-PRO)
+	uGuru 2.1.0.0 ~ 2.1.2.8 (AS8, AV8, AA8, AG8, AA8XE, AX8)
+	uGuru 2.3.0.0 ~ 2.3.0.9 (AN8)
+	uGuru 3.0.0.0 ~ 3.0.x.x (AW8, AL8, AT8, NI8 SLI, AT8 32X, AN8 32X,
+				 AW9D-MAX)
+	The abituguru3 driver is only for revison 3.0.x.x motherboards,
+	this driver will not work on older motherboards. For older
+	motherboards use the abituguru (without the 3 !) driver.
+
+Authors:
+	Hans de Goede <j.w.r.degoede@hhs.nl>,
+	(Initial reverse engineering done by Louis Kruger)
+
+
+Module Parameters
+-----------------
+
+* force: bool		Force detection. Note this parameter only causes the
+			detection to be skipped, and thus the insmod to
+			succeed. If the uGuru can't be read the actual hwmon
+			driver will not load and thus no hwmon device will get
+			registered.
+* verbose: bool		Should the driver be verbose?
+			0/off/false  normal output
+			1/on/true    + verbose error reporting (default)
+			Default: 1 (the driver is still in the testing phase)
+
+Description
+-----------
+
+This driver supports the hardware monitoring features of the third revision of
+the Abit uGuru chip, found on recent Abit uGuru featuring motherboards.
+
+The 3rd revision of the uGuru chip in reality is a Winbond W83L951G.
+Unfortunatly this doesn't help since the W83L951G is a generic microcontroller
+with a custom Abit application running on it.
+
+Despite Abit not releasing any information regarding the uGuru revision 3,
+Louis Kruger has managed to reverse engineer the sensor part of the uGuru.
+Without his work this driver would not have been possible.
+
+Known Issues
+------------
+
+The voltage and frequency control parts of the Abit uGuru are not supported,
+neither is writing any of the sensor settings and writing / reading the
+fanspeed control registers (FanEQ)
+
+If you encounter any problems please mail me <j.w.r.degoede@hhs.nl> and
+include the output of: "dmesg | grep abituguru"

drivers/hwmon/Kconfig

@@ -29,17 +29,34 @@ config HWMON_VID
 	default n
 
 config SENSORS_ABITUGURU
-	tristate "Abit uGuru"
+	tristate "Abit uGuru (rev 1 & 2)"
 	depends on EXPERIMENTAL
 	help
-	  If you say yes here you get support for the Abit uGuru chips
-	  sensor part. The voltage and frequency control parts of the Abit
-	  uGuru are not supported. The Abit uGuru chip can be found on Abit
-	  uGuru featuring motherboards (most modern Abit motherboards).
+	  If you say yes here you get support for the sensor part of the first
+	  and second revision of the Abit uGuru chip. The voltage and frequency
+	  control parts of the Abit uGuru are not supported. The Abit uGuru
+	  chip can be found on Abit uGuru featuring motherboards (most modern
+	  Abit motherboards from before end 2005). For more info and a list
+	  of which motherboards have which revision see
+	  Documentation/hwmon/abituguru
 
 	  This driver can also be built as a module.  If so, the module
 	  will be called abituguru.
 
+config SENSORS_ABITUGURU3
+	tristate "Abit uGuru (rev 3)"
+	depends on HWMON && EXPERIMENTAL
+	help
+	  If you say yes here you get support for the sensor part of the
+	  third revision of the Abit uGuru chip. Only reading the sensors
+	  and their settings is supported. The third revision of the Abit
+	  uGuru chip can be found on recent Abit motherboards (since end
+	  2005). For more info and a list of which motherboards have which
+	  revision see Documentation/hwmon/abituguru3
+
+	  This driver can also be built as a module.  If so, the module
+	  will be called abituguru3.
+
 config SENSORS_AD7418
 	tristate "Analog Devices AD7416, AD7417 and AD7418"
 	depends on I2C && EXPERIMENTAL

drivers/hwmon/Makefile

@@ -14,6 +14,7 @@ obj-$(CONFIG_SENSORS_W83781D)	+= w83781d.o
 obj-$(CONFIG_SENSORS_W83791D)	+= w83791d.o
 
 obj-$(CONFIG_SENSORS_ABITUGURU)	+= abituguru.o
+obj-$(CONFIG_SENSORS_ABITUGURU3)+= abituguru3.o
 obj-$(CONFIG_SENSORS_AD7418)	+= ad7418.o
 obj-$(CONFIG_SENSORS_ADM1021)	+= adm1021.o
 obj-$(CONFIG_SENSORS_ADM1025)	+= adm1025.o

drivers/hwmon/abituguru.c

@@ -16,9 +16,9 @@
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
 /*
-    This driver supports the sensor part of the custom Abit uGuru chip found
-    on Abit uGuru motherboards. Note: because of lack of specs the CPU / RAM /
-    etc voltage & frequency control is not supported!
+    This driver supports the sensor part of the first and second revision of
+    the custom Abit uGuru chip found on Abit uGuru motherboards. Note: because
+    of lack of specs the CPU/RAM voltage & frequency control is not supported!
 */
 #include <linux/module.h>
 #include <linux/sched.h>