projects / mirror_ubuntu-focal-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | Kernel driver i2c-i801 |
| 2 | ||
| 3 | Supported 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 | ||
| 15 | Authors: | |
| 16 | Frodo Looijaard <frodol@dds.nl>, | |
| 17 | Philip Edelbrock <phil@netroedge.com>, | |
| 18 | Mark Studebaker <mdsxyz123@yahoo.com> | |
| 19 | ||
| 20 | ||
| 21 | Module Parameters | |
| 22 | ----------------- | |
| 23 | ||
| d8db8f98 | 24 | None. |
| 1da177e4 LT |
25 | |
| 26 | ||
| 27 | Description | |
| 28 | ----------- | |
| 29 | ||
| 30 | The ICH (properly known as the 82801AA), ICH0 (82801AB), ICH2 (82801BA), | |
| 31 | ICH3 (82801CA/CAM) and later devices are Intel chips that are a part of | |
| 32 | Intel's '810' chipset for Celeron-based PCs, '810E' chipset for | |
| 33 | Pentium-based PCs, '815E' chipset, and others. | |
| 34 | ||
| 35 | The ICH chips contain at least SEVEN separate PCI functions in TWO logical | |
| 36 | PCI devices. An output of lspci will show something similar to the | |
| 37 | following: | |
| 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 | ||
| 45 | The SMBus controller is function 3 in device 1f. Class 0c05 is SMBus Serial | |
| 46 | Controller. | |
| 47 | ||
| 48 | If you do NOT see the 24x3 device at function 3, and you can't figure out | |
| 49 | any way in the BIOS to enable it, | |
| 50 | ||
| 51 | The ICH chips are quite similar to Intel's PIIX4 chip, at least in the | |
| 52 | SMBus controller. | |
| 53 | ||
| 54 | See the file i2c-piix4 for some additional information. | |
| 55 | ||
| 56 | ||
| 57 | Process Call Support | |
| 58 | -------------------- | |
| 59 | ||
| 60 | Not supported. | |
| 61 | ||
| 62 | ||
| 63 | I2C Block Read Support | |
| 64 | ---------------------- | |
| 65 | ||
| 66 | Not supported at the moment. | |
| 67 | ||
| 68 | ||
| 69 | SMBus 2.0 Support | |
| 70 | ----------------- | |
| 71 | ||
| 72 | The 82801DB (ICH4) and later chips support several SMBus 2.0 features. | |
| 73 | ||
| 74 | ********************** | |
| 75 | The lm_sensors project gratefully acknowledges the support of Texas | |
| 76 | Instruments in the initial development of this driver. | |
| 77 | ||
| 78 | The lm_sensors project gratefully acknowledges the support of Intel in the | |
| 79 | development of SMBus 2.0 / ICH4 features of this driver. |