1 Kernel driver smsc47b397
2 ========================
3
4 Supported chips:
5
6 * SMSC LPC47B397-NC
7
8 * SMSC SCH5307-NS
9
10 * SMSC SCH5317
11
12 Prefix: 'smsc47b397'
13
14 Addresses scanned: none, address read from
15
16 Datasheet: In this file
17
18 Authors:
19
20 - Mark M. Hoffman <mhoffman@lightlink.co
21 - Utilitek Systems, Inc.
22
23 November 23, 2004
24
25 The following specification describes the SMSC
26 (for which there is no public datasheet availa
27 provided by Craig Kelly (In-Store Broadcast Ne
28 by Mark M. Hoffman <mhoffman@lightlink.com>.
29
30 .. [1] And SMSC SCH5307-NS and SCH5317, which
31 otherwise compatible.
32
33 ----------------------------------------------
34
35 Methods for detecting the HP SIO and reading t
36 ----------------------------------------------
37
38 The thermal information on the dc7100 is conta
39 (HWM). The information is accessed through an
40 pair is located at the HWM Base Address + 0 an
41 HWM Base address can be obtained from Logical
42 and 0x61 (LSB). Currently we are using 0x480 f
43 0x480 and 0x481 for the index/data pair.
44
45 Reading temperature information.
46 The temperature information is located in the
47
48 =============== ======= ======================
49 Temp1 0x25 (Currently, this refle
50 Temp2 0x26
51 Temp3 0x27
52 Temp4 0x80
53 =============== ======= ======================
54
55 Programming Example
56 The following is an example of how to read the
57
58 MOV DX,480H
59 MOV AX,25H
60 OUT DX,AL
61 MOV DX,481H
62 IN AL,DX
63
64 AL contains the data in hex, the temperature i
65 equivalent.
66
67 Ex: If AL contains 0x2A, the temperature is 42
68
69 Reading tach information.
70 The fan speed information is located in the fo
71
72 =============== ======= ======= ==============
73 LSB MSB
74 Tach1 0x28 0x29 (Currently, th
75 fan speed on a
76 Tach2 0x2A 0x2B
77 Tach3 0x2C 0x2D
78 Tach4 0x2E 0x2F
79 =============== ======= ======= ==============
80
81 .. Important::
82
83 Reading the tach LSB locks the tach MS
84 The LSB Must be read first.
85
86 How to convert the tach reading to RPM
87 --------------------------------------
88
89 The tach reading (TCount) is given by: (Tach M
90 The SIO counts the number of 90kHz (11.111us)
91 RPM = 60/(TCount * 11.111us)
92
93 Example::
94
95 Reg 0x28 = 0x9B
96 Reg 0x29 = 0x08
97
98 TCount = 0x89B = 2203
99
100 RPM = 60 / (2203 * 11.11111 E-6) = 2451 RPM
101
102 Obtaining the SIO version.
103
104 Configuration Sequence
105 ----------------------
106
107 To program the configuration registers, the fo
108 1. Enter Configuration Mode
109 2. Configure the Configuration Registers
110 3. Exit Configuration Mode.
111
112 Enter Configuration Mode
113 ^^^^^^^^^^^^^^^^^^^^^^^^
114
115 To place the chip into the Configuration State
116 to the CONFIG PORT (0x2E).
117
118 Configuration Mode
119 ^^^^^^^^^^^^^^^^^^
120
121 In configuration mode, the INDEX PORT is locat
122 the DATA PORT is at INDEX PORT address + 1.
123
124 The desired configuration registers are access
125
126 a. Write the index of the Logical Device
127 (i.e., 0x07) to the INDEX PORT and the
128 desired logical device to the DATA POR
129
130 b. Write the address of the desired confi
131 logical device to the INDEX PORT and t
132 uration register through the DATA PORT
133
134 Note:
135 If accessing the Global Configuration
136
137 Exit Configuration Mode
138 ^^^^^^^^^^^^^^^^^^^^^^^
139
140 To exit the Configuration State the write 0xAA
141 The chip returns to the RUN State. (This is i
142
143 Programming Example
144 ^^^^^^^^^^^^^^^^^^^
145
146 The following is an example of how to read the
147
148 ; ENTER CONFIGURATION MODE
149 MOV DX,02EH
150 MOV AX,055H
151 OUT DX,AL
152 ; GLOBAL CONFIGURATION REGISTER
153 MOV DX,02EH
154 MOV AL,20H
155 OUT DX,AL
156 ; READ THE DATA
157 MOV DX,02FH
158 IN AL,DX
159 ; EXIT CONFIGURATION MODE
160 MOV DX,02EH
161 MOV AX,0AAH
162 OUT DX,AL
163
164 The registers of interest for identifying the
165 (0x20) and Device Rev (0x21).
166
167 The Device ID will read 0x6F (0x81 for SCH5307
168 The Device Rev currently reads 0x01
169
170 Obtaining the HWM Base Address
171 ------------------------------
172
173 The following is an example of how to read the
174 Logical Device 8::
175
176 ; ENTER CONFIGURATION MODE
177 MOV DX,02EH
178 MOV AX,055H
179 OUT DX,AL
180 ; CONFIGURE REGISTER CRE0,
181 ; LOGICAL DEVICE 8
182 MOV DX,02EH
183 MOV AL,07H
184 OUT DX,AL ;Point to LD# Config Reg
185 MOV DX,02FH
186 MOV AL, 08H
187 OUT DX,AL;Point to Logical Device
188 ;
189 MOV DX,02EH
190 MOV AL,60H
191 OUT DX,AL ; Point to HWM Base Ad
192 MOV DX,02FH
193 IN AL,DX ; Get MSB of HWM Base
194 ; EXIT CONFIGURATION MODE
195 MOV DX,02EH
196 MOV AX,0AAH
197 OUT DX,AL
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