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https://github.com/lm-sensors/lm-sensors.git
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Mark D. Studebaker
6306bbecca
uninitialized base address; remove compilation warning git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@1490 7894878c-1315-0410-8ee3-d5d059ff63e0
100 lines
2.7 KiB
Plaintext
100 lines
2.7 KiB
Plaintext
Kernel driver `i2c-i801.o'
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Status: Tested and stable.
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Block reads/writes lightly tested.
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ICH4 HW PEC support Beta.
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Supported adapters:
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* Intel 82801AA and 82801AB (ICH and ICH0 - part of the
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'810' and '810E' chipsets)
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* Intel 82801BA (ICH2 - part of the '815E' chipset)
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* Intel 82801CA/CAM (ICH3)
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* Intel 82801DB (ICH4)
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Datasheets: Publicly available at the Intel website
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Author: Frodo Looijaard <frodol@dds.nl>, Philip Edelbrock
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<phil@netroedge.com>, and Mark Studebaker <mdsxyz123@yahoo.com>
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Module Parameters
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-----------------
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* force_addr: int
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Forcibly enable the ICH at the given address. EXTREMELY DANGEROUS!
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Description
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-----------
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The ICH (properly known as the 82801AA), ICH0 (82801AB),
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ICH2 (82801BA) and ICH3 (82801CA/CAM) are Intel chips that are a part of
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Intel's '810' chipset for Celeron-based PCs,
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'810E' chipset for Pentium-based PCs, '815E' chipset, and others.
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The ICH chips contain at least SEVEN separate PCI functions
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in TWO logical PCI devices.
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An output of lspci will show something similar to the following:
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00:1e.0 PCI bridge: Intel Corporation: Unknown device 2418 (rev 01)
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00:1f.0 ISA bridge: Intel Corporation: Unknown device 2410 (rev 01)
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00:1f.1 IDE interface: Intel Corporation: Unknown device 2411 (rev 01)
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00:1f.2 USB Controller: Intel Corporation: Unknown device 2412 (rev 01)
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00:1f.3 Unknown class [0c05]: Intel Corporation: Unknown device 2413 (rev 01)
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The SMBus controller is function 3 in device 1f.
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Class 0c05 is SMBus Serial Controller.
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If you do NOT see the 24x3 device at function 3, and you can't
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figure out any way in the BIOS to enable it,
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(and especially if you have an Asus P4B board),
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see prog/hotplug/README.p4b.
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The ICH chips are quite similar to Intel's PIIX4 chip,
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at least in the SMBus controller.
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See the file i2c-piix4 for some additional information.
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Process Call Support
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--------------------
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Not supported.
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I2C Block Read Support
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----------------------
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The devices support a special 3-byte address (command code
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plus 2 more bytes) I2C block read.
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The driver and the kernel i2c protocol stack do not
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support this.
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SMBus 2.0 Support
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-----------------
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The 82801DB (ICH4) supports several SMBus 2.0 features.
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Kernel and driver support are as follows:
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Feature Kernel Driver
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Slave mode no no
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Host notify no no
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Block PEC yes yes
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Hardware PEC yes yes
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Other ICH4 Features
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-------------------
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The following additional ICH4 features are also _not_ supported:
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32 Byte buffer
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**********************
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The lm_sensors project gratefully acknowledges the support of
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Texas Instruments in the initial development of this driver.
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The lm_sensors project gratefully acknowledges the support of
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Intel in the development of SMBus 2.0 / ICH4 features of this driver.
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