mirror of
https://github.com/lm-sensors/lm-sensors.git
synced 2026-11-09 16:21:51 +00:00
(mds) Add i810 dual-bus (I2C/DDC) driver using algo-bit.
The i801 driver is for the standard I2C bus on an i810 board.
This driver adds the support for the DDC and TV-out busses.
git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@729 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Mark D. Studebaker committed
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8 files changed
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@@ -15,6 +15,9 @@ ask CVS about it:
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2.5.0 (200001??)
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Dropped all kernel 2.0 and 2.1 compatibility
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Module i2c-i810: new
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Module i2c-amd756: fixed region request
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Module ddcmon: new
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2.4.5 (20000116)
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Introduced DESTDIR installation prefix
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+1
-2
@@ -24,7 +24,7 @@ problems.
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Author of the i2c-via and i2c-viapro host drivers. Sis5595 hack.
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Extended support for GL518SM and GL520SM sensors.
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* Mark D. Studebaker <mdsxyz123@yahoo.com>
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Author of the i2c-ali15x3 bus driver and the i2c-i810 bus driver.
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Author of the i2c-ali15x3, i2c-i801, and i2c-i810 bus drivers.
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Added w83782d, w83783s, w83627hf, and as99127f support to the w83781d driver.
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Added max1617, thmc10, gl523sm, and lm84 support to the adm1021 driver.
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Added lm81 support to the adm9240 driver.
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@@ -41,7 +41,6 @@ problems.
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Author of the AMD756 module and sensord.
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* Constantine Gavrilov <const-g@xpert.com>
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Created and maintains the RPM files
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* Simon Vogl <simon@tk.uni-linz.ac.at>
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Wrote the new i2c kernel driver. This driver is indispensable for the
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workings of lm_sensors version 2.
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@@ -40,7 +40,9 @@ At least the following SMBus adapters are supported:
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Apple Hydra (used on some PPC machines)
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Intel ICH (used in the Intel 810 and 810E chipsets)
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Intel PIIX4 (used in most Intel chipsets)
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Intel I810 GMCH
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SiS 5595 (used in many SiS chipsets)
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3Dfx Voodoo 3 and Banshee
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VIA Technologies 82C586B (used in most VIA chipsets)
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VIA Technologies VT596A/B (used in some more modern VIA chipsets)
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@@ -63,6 +65,7 @@ We also support some miscellaneous chips:
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Linear Technologies LTC1710
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Dimms with EEPROMs
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Intel Xeon processor embedded EEPROMs
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DDC Monitor embedded EEPROMs
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We could use some testers of hardware. If you own a specific monitoring
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chip or I2C bus, and are willing to help us out, please contact us - even
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@@ -42,6 +42,9 @@ KERNEL MODULES
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an lm75. Add support for the two new registers.
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* Add MTP006F chip: http://www.myson.com/Pcd/MTP006/Mtp006.pdf
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gfiala@s.netic.de (Guido Fiala) has one on his mainboard
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* Rewrite i2c-voodoo3 to use i2c-algo-bit
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* Add support for Via 686a integrated sensors
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* Figure out what chips are appearing at 0x08 and 0x30
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LIBRARY
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=======
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@@ -0,0 +1,62 @@
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Kernel driver `i2c-i810.o'
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Status: 'Beta', still under development and testing
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Supported adapters:
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* Intel 82810 and 82810-DC100 (GMCH)
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Author: Frodo Looijaard <frodol@dds.nl>, Philip Edelbrock
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<phil@netroedge.com>,
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Kyösti Mälkki <kmalkki@cc.hut.fi>,
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and Mark D. Studebaker <mdsxyz123@yahoo.com>
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Main contact: Mark Studebaker <mdsxyz123@yahoo.com>
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Module Parameters
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-----------------
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(none)
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Description
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-----------
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WARNING: If you have an '810' motherboard, your standard I2C
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temperature sensors are most likely on the 801's I2C bus.
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You want the i2c-i801.o driver for those.
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Now for the i2c-i810...
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The GMCH chip contains two I2C interfaces.
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The first interface is used for DDC (Data Display Channel)
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which is a serial channel through the VGA monitor connector
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to a DDC-compliant monitor. This interface is defined by the
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Video Electronics Standards Association (VESA). The standards
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are available for purchase at http://www.vesa.org .
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The second interface is a general-purpose I2C bus.
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It may be connected to a TV-out chip such as the BT869 or possibly
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to a digital flat-panel display.
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Stability
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---------
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Seems to be stable on the test machine, but needs more testing on other
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machines.
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Supported Devices
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-----------------
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Specifically, this driver was written and tested on the '3dfx Voodoo3 AGP
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3000' which has a tv-out feature (s-video or composite). According to the
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docs and discussions, this code should work for any Voodoo3 based cards as
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well as Voodoo Banshee based cards. The DDC interface has been tested
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on a Voodoo Banshee card.
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Features
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--------
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Both busses use the i2c-algo-bit driver for 'bit banging' and support
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for specific transactions is provided by i2c-algo-bit.
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Issues
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------
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If you enable bus testing in i2c-algo-bit (insmod i2c-algo-bit bit_test=1),
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the test may fail and the i2c-i810 driver won't be inserted.
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@@ -27,6 +27,7 @@ KERNELBUSSESTARGETS := $(MODULE_DIR)/i2c-i801.o \
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$(MODULE_DIR)/i2c-viapro.o \
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$(MODULE_DIR)/i2c-voodoo3.o \
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$(MODULE_DIR)/i2c-amd756.o \
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$(MODULE_DIR)/i2c-i810.o \
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$(MODULE_DIR)/i2c-sis5595.o
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ifneq ($(shell if grep -q '^CONFIG_I2C_ALI15X3=y' $(LINUX)/.config; then echo 1; fi),1)
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KERNELBUSSESTARGETS += $(MODULE_DIR)/i2c-ali15x3.o
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@@ -0,0 +1,342 @@
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/*
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i2c-i810.c - Part of lm_sensors, Linux kernel modules for hardware
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monitoring
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Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>,
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Philip Edelbrock <phil@netroedge.com>,
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Ralph Metzler <rjkm@thp.uni-koeln.de>, and
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Mark D. Studebaker <mdsxyz123@yahoo.com>
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Based on code written by Ralph Metzler <rjkm@thp.uni-koeln.de> and
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Simon Vogl
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* This interfaces to the I2C bus of the I810 to gain access to
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the DDC Bus and possibly other I2C devices. */
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#include <linux/version.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <asm/io.h>
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#include <linux/i2c.h>
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#include <linux/i2c-algo-bit.h>
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#include "version.h"
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#include <linux/init.h>
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/* PCI defines */
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#ifndef PCI_DEVICE_ID_INTEL_82810
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#define PCI_DEVICE_ID_INTEL_82810 0x7121
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#endif
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#ifndef PCI_DEVICE_ID_INTEL_82810_DC100
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#define PCI_DEVICE_ID_INTEL_82810_DC100 0x7123
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#endif
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/* GPIO register locations */
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#define I810_IOCONTROL_OFFSET 0x5000
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#define I810_HVSYNC 0x00 /* not used */
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#define I810_GPIOA 0x10
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#define I810_GPIOB 0x14
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/* bit locations in the registers */
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#define SCL_DIR_MASK 0x0001
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#define SCL_DIR 0x0002
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#define SCL_VAL_MASK 0x0004
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#define SCL_VAL_OUT 0x0008
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#define SCL_VAL_IN 0x0010
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#define SDA_DIR_MASK 0x0100
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#define SDA_DIR 0x0200
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#define SDA_VAL_MASK 0x0400
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#define SDA_VAL_OUT 0x0800
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#define SDA_VAL_IN 0x1000
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/* initialization states */
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#define INIT1 0x1
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#define INIT2 0x2
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#define INIT3 0x4
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/* delays */
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#define CYCLE_DELAY 10
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#define TIMEOUT 50
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#ifdef MODULE
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static
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#else
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extern
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#endif
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int __init i2c_i810i2c_init(void);
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static int __init i810i2c_cleanup(void);
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static int i810i2c_setup(void);
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static void config_i810(struct pci_dev *dev);
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static void i810_inc(struct i2c_adapter *adapter);
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static void i810_dec(struct i2c_adapter *adapter);
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#ifdef MODULE
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extern int init_module(void);
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extern int cleanup_module(void);
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#endif /* MODULE */
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static int __initdata i810i2c_initialized;
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static unsigned char *mem;
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static inline void outlong(unsigned int dat, int off)
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{
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*((unsigned int *) (mem + off)) = dat;
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}
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static inline unsigned int readlong(int off)
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{
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return *((unsigned int *) (mem + off));
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}
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/* The i810 GPIO registers have individual masks for each bit
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so we never have to read before writing. Nice. */
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static void bit_i810i2c_setscl(void *data, int val)
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{
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outlong((val ? SCL_VAL_OUT : 0) | SCL_DIR | SCL_DIR_MASK | SCL_VAL_MASK,
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I810_GPIOB);
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}
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static void bit_i810i2c_setsda(void *data, int val)
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{
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outlong((val ? SDA_VAL_OUT : 0) | SDA_DIR | SDA_DIR_MASK | SDA_VAL_MASK,
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I810_GPIOB);
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}
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/* The GPIO pins are open drain, so the pins always remain outputs.
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We rely on the i2c-algo-bit routines to set the pins high before
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reading the input from other chips. */
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static int bit_i810i2c_getscl(void *data)
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{
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return (0 != (readlong(I810_GPIOB) & SCL_VAL_IN));
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}
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static int bit_i810i2c_getsda(void *data)
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{
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return (0 != (readlong(I810_GPIOB) & SDA_VAL_IN));
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}
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static void bit_i810ddc_setscl(void *data, int val)
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{
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outlong((val ? SCL_VAL_OUT : 0) | SCL_DIR | SCL_DIR_MASK | SCL_VAL_MASK,
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I810_GPIOA);
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}
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static void bit_i810ddc_setsda(void *data, int val)
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{
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outlong((val ? SDA_VAL_OUT : 0) | SDA_DIR | SDA_DIR_MASK | SDA_VAL_MASK,
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I810_GPIOA);
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}
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static int bit_i810ddc_getscl(void *data)
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{
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return (0 != (readlong(I810_GPIOA) & SCL_VAL_IN));
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}
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static int bit_i810ddc_getsda(void *data)
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{
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return (0 != (readlong(I810_GPIOA) & SDA_VAL_IN));
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}
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static struct i2c_algo_bit_data i810_i2c_bit_data = {
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NULL,
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bit_i810i2c_setsda,
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bit_i810i2c_setscl,
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bit_i810i2c_getsda,
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bit_i810i2c_getscl,
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CYCLE_DELAY, CYCLE_DELAY, TIMEOUT
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};
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static struct i2c_adapter i810_i2c_adapter = {
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"I810 I2C Adapter",
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I2C_HW_B_I810,
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NULL,
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&i810_i2c_bit_data,
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i810_inc,
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i810_dec,
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NULL,
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NULL,
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};
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static struct i2c_algo_bit_data i810_ddc_bit_data = {
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NULL,
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bit_i810ddc_setsda,
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bit_i810ddc_setscl,
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bit_i810ddc_getsda,
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bit_i810ddc_getscl,
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CYCLE_DELAY, CYCLE_DELAY, TIMEOUT
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};
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static struct i2c_adapter i810_ddc_adapter = {
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"I810 DDC Adapter",
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I2C_HW_B_I810,
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NULL,
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&i810_ddc_bit_data,
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i810_inc,
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i810_dec,
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NULL,
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NULL,
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};
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/* Configures the chip */
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void config_i810(struct pci_dev *dev)
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{
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unsigned long cadr;
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/* map I810 memory */
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,13)
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cadr = dev->resource[1].start;
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#else
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cadr = dev->base_address[1];
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#endif
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cadr += I810_IOCONTROL_OFFSET;
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cadr &= PCI_BASE_ADDRESS_MEM_MASK;
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mem = ioremap_nocache(cadr, 0x1000);
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bit_i810i2c_setscl(NULL, 1);
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bit_i810i2c_setsda(NULL, 1);
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bit_i810ddc_setscl(NULL, 1);
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bit_i810ddc_setsda(NULL, 1);
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}
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/* Detect whether a I810 or I810_DC100 can be found,
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and initialize it */
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static int i810i2c_setup(void)
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{
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struct pci_dev *dev;
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int num = 0;
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dev = NULL;
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do {
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if ((dev = pci_find_device(PCI_VENDOR_ID_INTEL,
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PCI_DEVICE_ID_INTEL_82810,
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dev))) {
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if (!num)
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config_i810(dev);
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num++;
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}
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} while (dev);
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dev = NULL;
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do {
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if ((dev = pci_find_device(PCI_VENDOR_ID_INTEL,
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PCI_DEVICE_ID_INTEL_82810_DC100,
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dev))) {
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if (!num)
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config_i810(dev);
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num++;
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}
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} while (dev);
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if (num > 0) {
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printk(KERN_INFO
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"i2c-i810.o: %d i810 found.\n", num);
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if (num > 1)
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printk(KERN_INFO
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"i2c-i810.o: warning: only 1 supported.\n");
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return 0;
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} else {
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return -ENODEV;
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}
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}
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void i810_inc(struct i2c_adapter *adapter)
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{
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MOD_INC_USE_COUNT;
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}
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void i810_dec(struct i2c_adapter *adapter)
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{
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MOD_DEC_USE_COUNT;
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}
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int __init i2c_i810i2c_init(void)
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{
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int res;
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printk("i2c-i810.o version %s (%s)\n", LM_VERSION, LM_DATE);
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i810i2c_initialized = 0;
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if ((res = i810i2c_setup())) {
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printk
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("i2c-i810.o: i810 not detected, module not inserted.\n");
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i810i2c_cleanup();
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return res;
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}
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if ((res = i2c_bit_add_bus(&i810_i2c_adapter))) {
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printk("i2c-i810.o: I2C adapter registration failed\n");
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} else {
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printk("i2c-i810.o: I810 I2C bus initialized\n");
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i810i2c_initialized |= INIT2;
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}
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if ((res = i2c_bit_add_bus(&i810_ddc_adapter))) {
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printk("i2c-i810.o: DDC adapter registration failed\n");
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} else {
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printk("i2c-i810.o: I810 DDC bus initialized\n");
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i810i2c_initialized |= INIT3;
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}
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if(!(i810i2c_initialized & (INIT2 | INIT3))) {
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printk("i2c-i810.o: Both registrations failed, module not inserted\n");
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i810i2c_cleanup();
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return res;
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}
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return 0;
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}
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int __init i810i2c_cleanup(void)
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{
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int res;
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iounmap(mem);
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if (i810i2c_initialized & INIT3) {
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if ((res = i2c_bit_del_bus(&i810_ddc_adapter))) {
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printk
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("i2c-i810.o: i2c_del_adapter failed, module not removed\n");
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return res;
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}
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}
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if (i810i2c_initialized & INIT2) {
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if ((res = i2c_bit_del_bus(&i810_i2c_adapter))) {
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printk
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("i2c-i810.o: i2c_del_adapter failed, module not removed\n");
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return res;
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}
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}
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i810i2c_initialized = 0;
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return 0;
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}
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EXPORT_NO_SYMBOLS;
|
||||
|
||||
#ifdef MODULE
|
||||
|
||||
MODULE_AUTHOR
|
||||
("Frodo Looijaard <frodol@dds.nl>, Philip Edelbrock <phil@netroedge.com>, Ralph Metzler <rjkm@thp.uni-koeln.de>, and Mark D. Studebaker <mdsxyz123@yahoo.com>");
|
||||
MODULE_DESCRIPTION("I810 I2C/DDC driver");
|
||||
|
||||
|
||||
int init_module(void)
|
||||
{
|
||||
return i2c_i810i2c_init();
|
||||
}
|
||||
|
||||
int cleanup_module(void)
|
||||
{
|
||||
return i810i2c_cleanup();
|
||||
}
|
||||
|
||||
#endif /* MODULE */
|
||||
@@ -224,6 +224,22 @@ use vars qw(@pci_adapters @chip_ids @undetectable_adapters);
|
||||
driver => "i2c-voodoo3",
|
||||
match => sub { $_[0] =~ /Banshee adapter/ },
|
||||
},
|
||||
{
|
||||
vendid => 0x8086,
|
||||
devid => 0x7121,
|
||||
func => 0,
|
||||
procid => "Intel 82810 GMCH",
|
||||
driver => "i2c-i810",
|
||||
match => sub { $_[0] =~ /^I810/ },
|
||||
} ,
|
||||
{
|
||||
vendid => 0x8086,
|
||||
devid => 0x7123,
|
||||
func => 0,
|
||||
procid => "Intel 82810-DC100 GMCH",
|
||||
driver => "i2c-i810",
|
||||
match => sub { $_[0] =~ /^I810/ },
|
||||
} ,
|
||||
);
|
||||
|
||||
use subs qw(lm78_detect lm78_isa_detect lm78_alias_detect lm75_detect
|
||||
|
||||
Reference in new issue
Block a user