1 =========================
2 Kernel driver i2c-ali15x3
3 =========================
4
5 Supported adapters:
6 * Acer Labs, Inc. ALI 1533 and 1543C (south
7
8 Datasheet: Now under NDA
9 http://www.ali.com.tw/
10
11 Authors:
12 - Frodo Looijaard <frodol@dds.nl>,
13 - Philip Edelbrock <phil@netroedge.com>
14 - Mark D. Studebaker <mdsxyz123@yahoo.c
15
16 Module Parameters
17 -----------------
18
19 * force_addr: int
20 Initialize the base address of the i2c con
21
22
23 Notes
24 -----
25
26 The force_addr parameter is useful for boards
27 the BIOS. Does not do a PCI force; the device
28 lspci. Don't use this unless the driver compla
29 not set.
30
31 Example::
32
33 modprobe i2c-ali15x3 force_addr=0xe800
34
35 SMBus periodically hangs on ASUS P5A motherboa
36 by a power cycle. Cause unknown (see Issues be
37
38
39 Description
40 -----------
41
42 This is the driver for the SMB Host controller
43 M1541 and M1543C South Bridges.
44
45 The M1543C is a South bridge for desktop syste
46
47 The M1541 is a South bridge for portable syste
48
49 They are part of the following ALI chipsets:
50
51 * "Aladdin Pro 2" includes the M1621 Slot 1 N
52 100MHz CPU Front Side bus
53 * "Aladdin V" includes the M1541 Socket 7 Nor
54 CPU Front Side bus
55
56 Some Aladdin V motherboards:
57 - Asus P5A
58 - Atrend ATC-5220
59 - BCM/GVC VP1541
60 - Biostar M5ALA
61 - Gigabyte GA-5AX (Generally doesn't w
62 enable the 7101 device!)
63 - Iwill XA100 Plus
64 - Micronics C200
65 - Microstar (MSI) MS-5169
66
67 * "Aladdin IV" includes the M1541 Socket 7 N
68 with host bus up to 83.3 MHz.
69
70 For an overview of these chips see http://www.
71 full data sheets on the web site are password
72 contact the ALI office in San Jose they may gi
73
74 The M1533/M1543C devices appear as FOUR separa
75 output of lspci will show something similar to
76
77 00:02.0 USB Controller: Acer Laboratories In
78 00:03.0 Bridge: Acer Laboratories Inc. M7101
79 00:07.0 ISA bridge: Acer Laboratories Inc. M
80 00:0f.0 IDE interface: Acer Laboratories Inc
81
82 .. important::
83
84 If you have a M1533 or M1543C on the board
85 "ali15x3: Error: Can't detect ali15x3!"
86 then run lspci.
87
88 If you see the 1533 and 5229 devices but NO
89 then you must enable ACPI, the PMU, SMB, or
90 in the BIOS.
91
92 The driver won't work if it can't find the
93
94 The SMB controller is part of the M7101 device
95 Power Management Unit (PMU).
96
97 The whole M7101 device has to be enabled for t
98 just enable the SMB alone. The SMB and the ACP
99 We make sure that the SMB is enabled. We leave
100
101 Features
102 --------
103
104 This driver controls the SMB Host only. The SM
105 controller on the M15X3 is not enabled. This d
106 interrupts.
107
108
109 Issues
110 ------
111
112 This driver requests the I/O space for only th
113 registers. It doesn't use the ACPI region.
114
115 On the ASUS P5A motherboard, there are several
116 the SMBus will hang and this can only be resol
117 powering off the computer. It appears to be wo
118 gets hot, for example under heavy CPU load, or
119 There may be electrical problems on this board
120 On the P5A, the W83781D sensor chip is on both
121 SMBus. Therefore the SMBus hangs can generally
122 by accessing the W83781D on the ISA bus only.
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