Commit | Line | Data |
---|---|---|
7f15b664 M |
1 | Kernel driver smsc47b397 |
2 | ======================== | |
3 | ||
4 | Supported chips: | |
b04f2f7d | 5 | |
7f15b664 | 6 | * SMSC LPC47B397-NC |
b04f2f7d | 7 | |
7ab83a91 | 8 | * SMSC SCH5307-NS |
b04f2f7d | 9 | |
2dbbdb35 | 10 | * SMSC SCH5317 |
b04f2f7d | 11 | |
7f15b664 | 12 | Prefix: 'smsc47b397' |
b04f2f7d | 13 | |
7f15b664 | 14 | Addresses scanned: none, address read from Super I/O config space |
b04f2f7d | 15 | |
7f15b664 M |
16 | Datasheet: In this file |
17 | ||
b04f2f7d MCC |
18 | Authors: |
19 | ||
20 | - Mark M. Hoffman <mhoffman@lightlink.com> | |
21 | - Utilitek Systems, Inc. | |
7f15b664 | 22 | |
1da177e4 LT |
23 | November 23, 2004 |
24 | ||
b04f2f7d | 25 | The following specification describes the SMSC LPC47B397-NC [1]_ sensor chip |
7f15b664 | 26 | (for which there is no public datasheet available). This document was |
1da177e4 LT |
27 | provided by Craig Kelly (In-Store Broadcast Network) and edited/corrected |
28 | by Mark M. Hoffman <mhoffman@lightlink.com>. | |
29 | ||
b04f2f7d MCC |
30 | .. [1] And SMSC SCH5307-NS and SCH5317, which have different device IDs but are |
31 | otherwise compatible. | |
7ab83a91 | 32 | |
b04f2f7d | 33 | ------------------------------------------------------------------------- |
1da177e4 | 34 | |
b04f2f7d MCC |
35 | Methods for detecting the HP SIO and reading the thermal data on a dc7100 |
36 | ------------------------------------------------------------------------- | |
1da177e4 LT |
37 | |
38 | The thermal information on the dc7100 is contained in the SIO Hardware Monitor | |
7f15b664 M |
39 | (HWM). The information is accessed through an index/data pair. The index/data |
40 | pair is located at the HWM Base Address + 0 and the HWM Base Address + 1. The | |
1da177e4 | 41 | HWM Base address can be obtained from Logical Device 8, registers 0x60 (MSB) |
7f15b664 | 42 | and 0x61 (LSB). Currently we are using 0x480 for the HWM Base Address and |
1da177e4 LT |
43 | 0x480 and 0x481 for the index/data pair. |
44 | ||
45 | Reading temperature information. | |
46 | The temperature information is located in the following registers: | |
b04f2f7d MCC |
47 | |
48 | =============== ======= ======================================================= | |
1da177e4 LT |
49 | Temp1 0x25 (Currently, this reflects the CPU temp on all systems). |
50 | Temp2 0x26 | |
51 | Temp3 0x27 | |
52 | Temp4 0x80 | |
b04f2f7d | 53 | =============== ======= ======================================================= |
1da177e4 LT |
54 | |
55 | Programming Example | |
b04f2f7d MCC |
56 | The following is an example of how to read the HWM temperature registers:: |
57 | ||
58 | MOV DX,480H | |
59 | MOV AX,25H | |
60 | OUT DX,AL | |
61 | MOV DX,481H | |
62 | IN AL,DX | |
1da177e4 LT |
63 | |
64 | AL contains the data in hex, the temperature in Celsius is the decimal | |
65 | equivalent. | |
66 | ||
67 | Ex: If AL contains 0x2A, the temperature is 42 degrees C. | |
68 | ||
69 | Reading tach information. | |
70 | The fan speed information is located in the following registers: | |
b04f2f7d MCC |
71 | |
72 | =============== ======= ======= ================================= | |
1da177e4 LT |
73 | LSB MSB |
74 | Tach1 0x28 0x29 (Currently, this reflects the CPU | |
75 | fan speed on all systems). | |
76 | Tach2 0x2A 0x2B | |
77 | Tach3 0x2C 0x2D | |
78 | Tach4 0x2E 0x2F | |
b04f2f7d | 79 | =============== ======= ======= ================================= |
1da177e4 | 80 | |
b04f2f7d MCC |
81 | .. Important:: |
82 | ||
83 | Reading the tach LSB locks the tach MSB. | |
84 | The LSB Must be read first. | |
85 | ||
86 | How to convert the tach reading to RPM | |
87 | -------------------------------------- | |
1da177e4 | 88 | |
7f15b664 | 89 | The tach reading (TCount) is given by: (Tach MSB * 256) + (Tach LSB) |
1da177e4 LT |
90 | The SIO counts the number of 90kHz (11.111us) pulses per revolution. |
91 | RPM = 60/(TCount * 11.111us) | |
92 | ||
b04f2f7d MCC |
93 | Example:: |
94 | ||
95 | Reg 0x28 = 0x9B | |
96 | Reg 0x29 = 0x08 | |
1da177e4 LT |
97 | |
98 | TCount = 0x89B = 2203 | |
99 | ||
100 | RPM = 60 / (2203 * 11.11111 E-6) = 2451 RPM | |
101 | ||
102 | Obtaining the SIO version. | |
103 | ||
b04f2f7d MCC |
104 | Configuration Sequence |
105 | ---------------------- | |
106 | ||
1da177e4 LT |
107 | To program the configuration registers, the following sequence must be followed: |
108 | 1. Enter Configuration Mode | |
109 | 2. Configure the Configuration Registers | |
110 | 3. Exit Configuration Mode. | |
111 | ||
112 | Enter Configuration Mode | |
b04f2f7d MCC |
113 | ^^^^^^^^^^^^^^^^^^^^^^^^ |
114 | ||
1da177e4 | 115 | To place the chip into the Configuration State The config key (0x55) is written |
2bf34a1c | 116 | to the CONFIG PORT (0x2E). |
1da177e4 LT |
117 | |
118 | Configuration Mode | |
b04f2f7d MCC |
119 | ^^^^^^^^^^^^^^^^^^ |
120 | ||
1da177e4 LT |
121 | In configuration mode, the INDEX PORT is located at the CONFIG PORT address and |
122 | the DATA PORT is at INDEX PORT address + 1. | |
123 | ||
2bf34a1c | 124 | The desired configuration registers are accessed in two steps: |
b04f2f7d | 125 | |
1da177e4 LT |
126 | a. Write the index of the Logical Device Number Configuration Register |
127 | (i.e., 0x07) to the INDEX PORT and then write the number of the | |
128 | desired logical device to the DATA PORT. | |
129 | ||
130 | b. Write the address of the desired configuration register within the | |
131 | logical device to the INDEX PORT and then write or read the config- | |
2bf34a1c | 132 | uration register through the DATA PORT. |
1da177e4 | 133 | |
b04f2f7d MCC |
134 | Note: |
135 | If accessing the Global Configuration Registers, step (a) is not required. | |
1da177e4 LT |
136 | |
137 | Exit Configuration Mode | |
b04f2f7d MCC |
138 | ^^^^^^^^^^^^^^^^^^^^^^^ |
139 | ||
1da177e4 LT |
140 | To exit the Configuration State the write 0xAA to the CONFIG PORT (0x2E). |
141 | The chip returns to the RUN State. (This is important). | |
142 | ||
143 | Programming Example | |
b04f2f7d MCC |
144 | ^^^^^^^^^^^^^^^^^^^ |
145 | ||
146 | The following is an example of how to read the SIO Device ID located at 0x20: | |
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 | |
1da177e4 LT |
163 | |
164 | The registers of interest for identifying the SIO on the dc7100 are Device ID | |
165 | (0x20) and Device Rev (0x21). | |
166 | ||
2dbbdb35 | 167 | The Device ID will read 0x6F (0x81 for SCH5307-NS, and 0x85 for SCH5317) |
1da177e4 LT |
168 | The Device Rev currently reads 0x01 |
169 | ||
b04f2f7d MCC |
170 | Obtaining the HWM Base Address |
171 | ------------------------------ | |
172 | ||
1da177e4 | 173 | The following is an example of how to read the HWM Base Address located in |
b04f2f7d MCC |
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 8 | |
188 | ; | |
189 | MOV DX,02EH | |
190 | MOV AL,60H | |
191 | OUT DX,AL ; Point to HWM Base Addr MSB | |
192 | MOV DX,02FH | |
193 | IN AL,DX ; Get MSB of HWM Base Addr | |
194 | ; EXIT CONFIGURATION MODE | |
195 | MOV DX,02EH | |
196 | MOV AX,0AAH | |
197 | OUT DX,AL |