tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1Kernel driver i2c-i801
2
3Supported adapters:
4 * Intel 82801AA and 82801AB (ICH and ICH0 - part of the
5 '810' and '810E' chipsets)
6 * Intel 82801BA (ICH2 - part of the '815E' chipset)
7 * Intel 82801CA/CAM (ICH3)
8 * Intel 82801DB (ICH4) (HW PEC supported, 32 byte buffer not supported)
9 * Intel 82801EB/ER (ICH5) (HW PEC supported, 32 byte buffer not supported)
10 * Intel 6300ESB
11 * Intel 82801FB/FR/FW/FRW (ICH6)
12 * Intel ICH7
13 Datasheets: Publicly available at the Intel website
14
15Authors:
16 Frodo Looijaard <frodol@dds.nl>,
17 Philip Edelbrock <phil@netroedge.com>,
18 Mark Studebaker <mdsxyz123@yahoo.com>
19
20
21Module Parameters
22-----------------
23
24None.
25
26
27Description
28-----------
29
30The ICH (properly known as the 82801AA), ICH0 (82801AB), ICH2 (82801BA),
31ICH3 (82801CA/CAM) and later devices are Intel chips that are a part of
32Intel's '810' chipset for Celeron-based PCs, '810E' chipset for
33Pentium-based PCs, '815E' chipset, and others.
34
35The ICH chips contain at least SEVEN separate PCI functions in TWO logical
36PCI devices. An output of lspci will show something similar to the
37following:
38
39 00:1e.0 PCI bridge: Intel Corporation: Unknown device 2418 (rev 01)
40 00:1f.0 ISA bridge: Intel Corporation: Unknown device 2410 (rev 01)
41 00:1f.1 IDE interface: Intel Corporation: Unknown device 2411 (rev 01)
42 00:1f.2 USB Controller: Intel Corporation: Unknown device 2412 (rev 01)
43 00:1f.3 Unknown class [0c05]: Intel Corporation: Unknown device 2413 (rev 01)
44
45The SMBus controller is function 3 in device 1f. Class 0c05 is SMBus Serial
46Controller.
47
48If you do NOT see the 24x3 device at function 3, and you can't figure out
49any way in the BIOS to enable it,
50
51The ICH chips are quite similar to Intel's PIIX4 chip, at least in the
52SMBus controller.
53
54See the file i2c-piix4 for some additional information.
55
56
57Process Call Support
58--------------------
59
60Not supported.
61
62
63I2C Block Read Support
64----------------------
65
66Not supported at the moment.
67
68
69SMBus 2.0 Support
70-----------------
71
72The 82801DB (ICH4) and later chips support several SMBus 2.0 features.
73
74**********************
75The lm_sensors project gratefully acknowledges the support of Texas
76Instruments in the initial development of this driver.
77
78The lm_sensors project gratefully acknowledges the support of Intel in the
79development of SMBus 2.0 / ICH4 features of this driver.