| 1 | Kernel driver `i2c-sis645.o' |
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| 2 | |
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| 3 | Status: Beta |
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| 4 | |
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| 5 | Supported adapters: |
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| 6 | * Silicon Integrated Systems Corp (SiS) |
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| 7 | 645/961 chipset |
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| 8 | 645DX/961 chipset |
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| 9 | 735 chipset |
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| 10 | |
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| 11 | Author: Mark M. Hoffman <mhoffman@lightlink.com> |
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| 12 | |
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| 13 | License: GPL |
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| 14 | |
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| 15 | |
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| 16 | Module Parameters |
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| 17 | ----------------- |
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| 18 | |
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| 19 | (none) |
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| 20 | |
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| 21 | |
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| 22 | Description |
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| 23 | ----------- |
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| 24 | |
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| 25 | This SMBus only driver is known to work on motherboards with the above named |
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| 26 | chipset combinations. The driver was developed without benefit of a proper |
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| 27 | datasheet from SiS. The SMBus registers are assumed compatible with those of |
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| 28 | the SiS630, although they are located in a completely different place. Thanks |
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| 29 | to Alexander Malysh <amalysh@web.de> for providing the SiS630 datasheet (and |
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| 30 | driver). |
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| 31 | |
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| 32 | The command "lspci" as root should produce something like these lines: |
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| 33 | |
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| 34 | 00:00.0 Host bridge: Silicon Integrated Systems [SiS]: Unknown device 0645 |
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| 35 | 00:02.0 ISA bridge: Silicon Integrated Systems [SiS] 85C503/5513 |
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| 36 | 00:02.1 SMBus: Silicon Integrated Systems [SiS]: Unknown device 0016 |
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| 37 | |
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| 38 | or perhaps this... |
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| 39 | |
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| 40 | 00:00.0 Host bridge: Silicon Integrated Systems [SiS]: Unknown device 0645 (rev 02) |
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| 41 | 00:02.0 ISA bridge: Silicon Integrated Systems [SiS]: Unknown device 0961 |
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| 42 | 00:02.1 SMBus: Silicon Integrated Systems [SiS]: Unknown device 0016 |
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| 43 | |
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| 44 | (kernel versions later than 2.4.18 may fill in the "Unknown"s) |
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| 45 | |
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| 46 | If the SMBus line is missing, then the BIOS on the board has disabled the |
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| 47 | device. This driver is capable of enabling it, as long as the kernel has |
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| 48 | CONFIG_HOTPLUG enabled. In that case, the SMBus device will appear in "lspci" |
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| 49 | after the driver is loaded. Note that you need to rebuild lm_sensors AFTER |
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| 50 | running "make config" or equivalent on your kernel, otherwise the i2c-sis645 |
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| 51 | driver will not build in this support. |
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| 52 | |
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| 53 | I suspect that this driver could be made to work for the following SiS chipsets |
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| 54 | as well: 648/963, 651/962, 650/961, 635, and 635T. |
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| 55 | If anyone owns a board with those chips AND is willing to risk crashing & |
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| 56 | burning an otherwise well-behaved kernel in the name of progress... please |
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| 57 | contact me at <mhoffman@lightlink.com> or via the project's mailing list: |
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| 58 | <sensors@stimpy.netroedge.com>. Please send bug reports and/or success |
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| 59 | stories as well. |
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| 60 | |
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| 61 | |
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| 62 | TO DOs |
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| 63 | ----------- |
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| 64 | * The driver does not support SMBus block reads/writes; I may add them if a |
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| 65 | scenario is found where they're needed. |
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| 66 | * Determine if any of Albert Cranford's cleanups for kernel 2.5.34 can be |
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| 67 | applied to this code. |
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| 68 | |
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| 69 | |
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| 70 | Thank Yous |
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| 71 | ----------- |
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| 72 | Mark D. Studebaker <mds@paradyne.com> |
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| 73 | - design hints and bug fixes |
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| 74 | Alexander Maylsh <amalysh@web.de> |
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| 75 | - ditto, plus an important datasheet... almost the one I really wanted |
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| 76 | Hans-Günter Lütke Uphues <hg_lu@t-online.de> |
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| 77 | - patch for SiS735 |
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| 78 | Robert Zwerus <arzie@dds.nl> |
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| 79 | - testing for SiS645DX |
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| 80 | To anyone else who has written w/ feedback, thanks! |
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| 81 | |
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