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1da177e4 LT |
1 | /* |
2 | * lm80.c - From lm_sensors, Linux kernel modules for hardware | |
3 | * monitoring | |
4 | * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl> | |
5 | * and Philip Edelbrock <phil@netroedge.com> | |
6 | * | |
7 | * Ported to Linux 2.6 by Tiago Sousa <mirage@kaotik.org> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | */ | |
23 | ||
1da177e4 LT |
24 | #include <linux/module.h> |
25 | #include <linux/init.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/jiffies.h> | |
28 | #include <linux/i2c.h> | |
943b0830 MH |
29 | #include <linux/hwmon.h> |
30 | #include <linux/err.h> | |
9a61bf63 | 31 | #include <linux/mutex.h> |
1da177e4 LT |
32 | |
33 | /* Addresses to scan */ | |
34 | static unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, | |
35 | 0x2d, 0x2e, 0x2f, I2C_CLIENT_END }; | |
1da177e4 LT |
36 | |
37 | /* Insmod parameters */ | |
f4b50261 | 38 | I2C_CLIENT_INSMOD_1(lm80); |
1da177e4 LT |
39 | |
40 | /* Many LM80 constants specified below */ | |
41 | ||
42 | /* The LM80 registers */ | |
43 | #define LM80_REG_IN_MAX(nr) (0x2a + (nr) * 2) | |
44 | #define LM80_REG_IN_MIN(nr) (0x2b + (nr) * 2) | |
45 | #define LM80_REG_IN(nr) (0x20 + (nr)) | |
46 | ||
47 | #define LM80_REG_FAN1 0x28 | |
48 | #define LM80_REG_FAN2 0x29 | |
49 | #define LM80_REG_FAN_MIN(nr) (0x3b + (nr)) | |
50 | ||
51 | #define LM80_REG_TEMP 0x27 | |
52 | #define LM80_REG_TEMP_HOT_MAX 0x38 | |
53 | #define LM80_REG_TEMP_HOT_HYST 0x39 | |
54 | #define LM80_REG_TEMP_OS_MAX 0x3a | |
55 | #define LM80_REG_TEMP_OS_HYST 0x3b | |
56 | ||
57 | #define LM80_REG_CONFIG 0x00 | |
58 | #define LM80_REG_ALARM1 0x01 | |
59 | #define LM80_REG_ALARM2 0x02 | |
60 | #define LM80_REG_MASK1 0x03 | |
61 | #define LM80_REG_MASK2 0x04 | |
62 | #define LM80_REG_FANDIV 0x05 | |
63 | #define LM80_REG_RES 0x06 | |
64 | ||
65 | ||
66 | /* Conversions. Rounding and limit checking is only done on the TO_REG | |
67 | variants. Note that you should be a bit careful with which arguments | |
68 | these macros are called: arguments may be evaluated more than once. | |
69 | Fixing this is just not worth it. */ | |
70 | ||
71 | #define IN_TO_REG(val) (SENSORS_LIMIT(((val)+5)/10,0,255)) | |
72 | #define IN_FROM_REG(val) ((val)*10) | |
73 | ||
74 | static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div) | |
75 | { | |
76 | if (rpm == 0) | |
77 | return 255; | |
78 | rpm = SENSORS_LIMIT(rpm, 1, 1000000); | |
79 | return SENSORS_LIMIT((1350000 + rpm*div / 2) / (rpm*div), 1, 254); | |
80 | } | |
81 | ||
82 | #define FAN_FROM_REG(val,div) ((val)==0?-1:\ | |
83 | (val)==255?0:1350000/((div)*(val))) | |
84 | ||
85 | static inline long TEMP_FROM_REG(u16 temp) | |
86 | { | |
87 | long res; | |
88 | ||
89 | temp >>= 4; | |
90 | if (temp < 0x0800) | |
91 | res = 625 * (long) temp; | |
92 | else | |
93 | res = ((long) temp - 0x01000) * 625; | |
94 | ||
95 | return res / 10; | |
96 | } | |
97 | ||
98 | #define TEMP_LIMIT_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000) | |
99 | ||
100 | #define TEMP_LIMIT_TO_REG(val) SENSORS_LIMIT((val)<0?\ | |
101 | ((val)-500)/1000:((val)+500)/1000,0,255) | |
102 | ||
103 | #define DIV_FROM_REG(val) (1 << (val)) | |
104 | ||
105 | /* | |
106 | * Client data (each client gets its own) | |
107 | */ | |
108 | ||
109 | struct lm80_data { | |
110 | struct i2c_client client; | |
1beeffe4 | 111 | struct device *hwmon_dev; |
9a61bf63 | 112 | struct mutex update_lock; |
1da177e4 LT |
113 | char valid; /* !=0 if following fields are valid */ |
114 | unsigned long last_updated; /* In jiffies */ | |
115 | ||
116 | u8 in[7]; /* Register value */ | |
117 | u8 in_max[7]; /* Register value */ | |
118 | u8 in_min[7]; /* Register value */ | |
119 | u8 fan[2]; /* Register value */ | |
120 | u8 fan_min[2]; /* Register value */ | |
121 | u8 fan_div[2]; /* Register encoding, shifted right */ | |
122 | u16 temp; /* Register values, shifted right */ | |
123 | u8 temp_hot_max; /* Register value */ | |
124 | u8 temp_hot_hyst; /* Register value */ | |
125 | u8 temp_os_max; /* Register value */ | |
126 | u8 temp_os_hyst; /* Register value */ | |
127 | u16 alarms; /* Register encoding, combined */ | |
128 | }; | |
129 | ||
130 | /* | |
131 | * Functions declaration | |
132 | */ | |
133 | ||
134 | static int lm80_attach_adapter(struct i2c_adapter *adapter); | |
135 | static int lm80_detect(struct i2c_adapter *adapter, int address, int kind); | |
136 | static void lm80_init_client(struct i2c_client *client); | |
137 | static int lm80_detach_client(struct i2c_client *client); | |
138 | static struct lm80_data *lm80_update_device(struct device *dev); | |
139 | static int lm80_read_value(struct i2c_client *client, u8 reg); | |
140 | static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value); | |
141 | ||
142 | /* | |
143 | * Driver data (common to all clients) | |
144 | */ | |
145 | ||
146 | static struct i2c_driver lm80_driver = { | |
cdaf7934 | 147 | .driver = { |
cdaf7934 LR |
148 | .name = "lm80", |
149 | }, | |
1da177e4 | 150 | .id = I2C_DRIVERID_LM80, |
1da177e4 LT |
151 | .attach_adapter = lm80_attach_adapter, |
152 | .detach_client = lm80_detach_client, | |
153 | }; | |
154 | ||
155 | /* | |
156 | * Sysfs stuff | |
157 | */ | |
158 | ||
159 | #define show_in(suffix, value) \ | |
8627f9ba | 160 | static ssize_t show_in_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
161 | { \ |
162 | struct lm80_data *data = lm80_update_device(dev); \ | |
163 | return sprintf(buf, "%d\n", IN_FROM_REG(data->value)); \ | |
164 | } | |
165 | show_in(min0, in_min[0]); | |
166 | show_in(min1, in_min[1]); | |
167 | show_in(min2, in_min[2]); | |
168 | show_in(min3, in_min[3]); | |
169 | show_in(min4, in_min[4]); | |
170 | show_in(min5, in_min[5]); | |
171 | show_in(min6, in_min[6]); | |
172 | show_in(max0, in_max[0]); | |
173 | show_in(max1, in_max[1]); | |
174 | show_in(max2, in_max[2]); | |
175 | show_in(max3, in_max[3]); | |
176 | show_in(max4, in_max[4]); | |
177 | show_in(max5, in_max[5]); | |
178 | show_in(max6, in_max[6]); | |
179 | show_in(input0, in[0]); | |
180 | show_in(input1, in[1]); | |
181 | show_in(input2, in[2]); | |
182 | show_in(input3, in[3]); | |
183 | show_in(input4, in[4]); | |
184 | show_in(input5, in[5]); | |
185 | show_in(input6, in[6]); | |
186 | ||
187 | #define set_in(suffix, value, reg) \ | |
8627f9ba | 188 | static ssize_t set_in_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \ |
1da177e4 LT |
189 | size_t count) \ |
190 | { \ | |
191 | struct i2c_client *client = to_i2c_client(dev); \ | |
192 | struct lm80_data *data = i2c_get_clientdata(client); \ | |
193 | long val = simple_strtol(buf, NULL, 10); \ | |
194 | \ | |
9a61bf63 | 195 | mutex_lock(&data->update_lock);\ |
1da177e4 LT |
196 | data->value = IN_TO_REG(val); \ |
197 | lm80_write_value(client, reg, data->value); \ | |
9a61bf63 | 198 | mutex_unlock(&data->update_lock);\ |
1da177e4 LT |
199 | return count; \ |
200 | } | |
201 | set_in(min0, in_min[0], LM80_REG_IN_MIN(0)); | |
202 | set_in(min1, in_min[1], LM80_REG_IN_MIN(1)); | |
203 | set_in(min2, in_min[2], LM80_REG_IN_MIN(2)); | |
204 | set_in(min3, in_min[3], LM80_REG_IN_MIN(3)); | |
205 | set_in(min4, in_min[4], LM80_REG_IN_MIN(4)); | |
206 | set_in(min5, in_min[5], LM80_REG_IN_MIN(5)); | |
207 | set_in(min6, in_min[6], LM80_REG_IN_MIN(6)); | |
208 | set_in(max0, in_max[0], LM80_REG_IN_MAX(0)); | |
209 | set_in(max1, in_max[1], LM80_REG_IN_MAX(1)); | |
210 | set_in(max2, in_max[2], LM80_REG_IN_MAX(2)); | |
211 | set_in(max3, in_max[3], LM80_REG_IN_MAX(3)); | |
212 | set_in(max4, in_max[4], LM80_REG_IN_MAX(4)); | |
213 | set_in(max5, in_max[5], LM80_REG_IN_MAX(5)); | |
214 | set_in(max6, in_max[6], LM80_REG_IN_MAX(6)); | |
215 | ||
216 | #define show_fan(suffix, value, div) \ | |
8627f9ba | 217 | static ssize_t show_fan_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
218 | { \ |
219 | struct lm80_data *data = lm80_update_device(dev); \ | |
220 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->value, \ | |
221 | DIV_FROM_REG(data->div))); \ | |
222 | } | |
223 | show_fan(min1, fan_min[0], fan_div[0]); | |
224 | show_fan(min2, fan_min[1], fan_div[1]); | |
225 | show_fan(input1, fan[0], fan_div[0]); | |
226 | show_fan(input2, fan[1], fan_div[1]); | |
227 | ||
228 | #define show_fan_div(suffix, value) \ | |
8627f9ba | 229 | static ssize_t show_fan_div##suffix(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
230 | { \ |
231 | struct lm80_data *data = lm80_update_device(dev); \ | |
232 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->value)); \ | |
233 | } | |
234 | show_fan_div(1, fan_div[0]); | |
235 | show_fan_div(2, fan_div[1]); | |
236 | ||
237 | #define set_fan(suffix, value, reg, div) \ | |
8627f9ba | 238 | static ssize_t set_fan_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \ |
1da177e4 LT |
239 | size_t count) \ |
240 | { \ | |
241 | struct i2c_client *client = to_i2c_client(dev); \ | |
242 | struct lm80_data *data = i2c_get_clientdata(client); \ | |
243 | long val = simple_strtoul(buf, NULL, 10); \ | |
244 | \ | |
9a61bf63 | 245 | mutex_lock(&data->update_lock);\ |
1da177e4 LT |
246 | data->value = FAN_TO_REG(val, DIV_FROM_REG(data->div)); \ |
247 | lm80_write_value(client, reg, data->value); \ | |
9a61bf63 | 248 | mutex_unlock(&data->update_lock);\ |
1da177e4 LT |
249 | return count; \ |
250 | } | |
251 | set_fan(min1, fan_min[0], LM80_REG_FAN_MIN(1), fan_div[0]); | |
252 | set_fan(min2, fan_min[1], LM80_REG_FAN_MIN(2), fan_div[1]); | |
253 | ||
254 | /* Note: we save and restore the fan minimum here, because its value is | |
255 | determined in part by the fan divisor. This follows the principle of | |
d6e05edc | 256 | least surprise; the user doesn't expect the fan minimum to change just |
1da177e4 LT |
257 | because the divisor changed. */ |
258 | static ssize_t set_fan_div(struct device *dev, const char *buf, | |
259 | size_t count, int nr) | |
260 | { | |
261 | struct i2c_client *client = to_i2c_client(dev); | |
262 | struct lm80_data *data = i2c_get_clientdata(client); | |
263 | unsigned long min, val = simple_strtoul(buf, NULL, 10); | |
264 | u8 reg; | |
265 | ||
266 | /* Save fan_min */ | |
9a61bf63 | 267 | mutex_lock(&data->update_lock); |
1da177e4 LT |
268 | min = FAN_FROM_REG(data->fan_min[nr], |
269 | DIV_FROM_REG(data->fan_div[nr])); | |
270 | ||
271 | switch (val) { | |
272 | case 1: data->fan_div[nr] = 0; break; | |
273 | case 2: data->fan_div[nr] = 1; break; | |
274 | case 4: data->fan_div[nr] = 2; break; | |
275 | case 8: data->fan_div[nr] = 3; break; | |
276 | default: | |
277 | dev_err(&client->dev, "fan_div value %ld not " | |
278 | "supported. Choose one of 1, 2, 4 or 8!\n", val); | |
9a61bf63 | 279 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
280 | return -EINVAL; |
281 | } | |
282 | ||
283 | reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1)))) | |
284 | | (data->fan_div[nr] << (2 * (nr + 1))); | |
285 | lm80_write_value(client, LM80_REG_FANDIV, reg); | |
286 | ||
287 | /* Restore fan_min */ | |
288 | data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); | |
289 | lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]); | |
9a61bf63 | 290 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
291 | |
292 | return count; | |
293 | } | |
294 | ||
295 | #define set_fan_div(number) \ | |
8627f9ba | 296 | static ssize_t set_fan_div##number(struct device *dev, struct device_attribute *attr, const char *buf, \ |
1da177e4 LT |
297 | size_t count) \ |
298 | { \ | |
299 | return set_fan_div(dev, buf, count, number - 1); \ | |
300 | } | |
301 | set_fan_div(1); | |
302 | set_fan_div(2); | |
303 | ||
8627f9ba | 304 | static ssize_t show_temp_input1(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
305 | { |
306 | struct lm80_data *data = lm80_update_device(dev); | |
307 | return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp)); | |
308 | } | |
309 | ||
310 | #define show_temp(suffix, value) \ | |
8627f9ba | 311 | static ssize_t show_temp_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
312 | { \ |
313 | struct lm80_data *data = lm80_update_device(dev); \ | |
314 | return sprintf(buf, "%d\n", TEMP_LIMIT_FROM_REG(data->value)); \ | |
315 | } | |
316 | show_temp(hot_max, temp_hot_max); | |
317 | show_temp(hot_hyst, temp_hot_hyst); | |
318 | show_temp(os_max, temp_os_max); | |
319 | show_temp(os_hyst, temp_os_hyst); | |
320 | ||
321 | #define set_temp(suffix, value, reg) \ | |
8627f9ba | 322 | static ssize_t set_temp_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \ |
1da177e4 LT |
323 | size_t count) \ |
324 | { \ | |
325 | struct i2c_client *client = to_i2c_client(dev); \ | |
326 | struct lm80_data *data = i2c_get_clientdata(client); \ | |
327 | long val = simple_strtoul(buf, NULL, 10); \ | |
328 | \ | |
9a61bf63 | 329 | mutex_lock(&data->update_lock); \ |
1da177e4 LT |
330 | data->value = TEMP_LIMIT_TO_REG(val); \ |
331 | lm80_write_value(client, reg, data->value); \ | |
9a61bf63 | 332 | mutex_unlock(&data->update_lock); \ |
1da177e4 LT |
333 | return count; \ |
334 | } | |
335 | set_temp(hot_max, temp_hot_max, LM80_REG_TEMP_HOT_MAX); | |
336 | set_temp(hot_hyst, temp_hot_hyst, LM80_REG_TEMP_HOT_HYST); | |
337 | set_temp(os_max, temp_os_max, LM80_REG_TEMP_OS_MAX); | |
338 | set_temp(os_hyst, temp_os_hyst, LM80_REG_TEMP_OS_HYST); | |
339 | ||
8627f9ba | 340 | static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
341 | { |
342 | struct lm80_data *data = lm80_update_device(dev); | |
343 | return sprintf(buf, "%u\n", data->alarms); | |
344 | } | |
345 | ||
346 | static DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min0, set_in_min0); | |
347 | static DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min1, set_in_min1); | |
348 | static DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min2, set_in_min2); | |
349 | static DEVICE_ATTR(in3_min, S_IWUSR | S_IRUGO, show_in_min3, set_in_min3); | |
350 | static DEVICE_ATTR(in4_min, S_IWUSR | S_IRUGO, show_in_min4, set_in_min4); | |
351 | static DEVICE_ATTR(in5_min, S_IWUSR | S_IRUGO, show_in_min5, set_in_min5); | |
352 | static DEVICE_ATTR(in6_min, S_IWUSR | S_IRUGO, show_in_min6, set_in_min6); | |
353 | static DEVICE_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max0, set_in_max0); | |
354 | static DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max1, set_in_max1); | |
355 | static DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max2, set_in_max2); | |
356 | static DEVICE_ATTR(in3_max, S_IWUSR | S_IRUGO, show_in_max3, set_in_max3); | |
357 | static DEVICE_ATTR(in4_max, S_IWUSR | S_IRUGO, show_in_max4, set_in_max4); | |
358 | static DEVICE_ATTR(in5_max, S_IWUSR | S_IRUGO, show_in_max5, set_in_max5); | |
359 | static DEVICE_ATTR(in6_max, S_IWUSR | S_IRUGO, show_in_max6, set_in_max6); | |
360 | static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL); | |
361 | static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL); | |
362 | static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL); | |
363 | static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL); | |
364 | static DEVICE_ATTR(in4_input, S_IRUGO, show_in_input4, NULL); | |
365 | static DEVICE_ATTR(in5_input, S_IRUGO, show_in_input5, NULL); | |
366 | static DEVICE_ATTR(in6_input, S_IRUGO, show_in_input6, NULL); | |
367 | static DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min1, | |
368 | set_fan_min1); | |
369 | static DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min2, | |
370 | set_fan_min2); | |
371 | static DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input1, NULL); | |
372 | static DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input2, NULL); | |
373 | static DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div1, set_fan_div1); | |
374 | static DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div2, set_fan_div2); | |
375 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL); | |
376 | static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_hot_max, | |
377 | set_temp_hot_max); | |
378 | static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp_hot_hyst, | |
379 | set_temp_hot_hyst); | |
380 | static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_os_max, | |
381 | set_temp_os_max); | |
382 | static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_os_hyst, | |
383 | set_temp_os_hyst); | |
384 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
385 | ||
386 | /* | |
387 | * Real code | |
388 | */ | |
389 | ||
390 | static int lm80_attach_adapter(struct i2c_adapter *adapter) | |
391 | { | |
392 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
393 | return 0; | |
2ed2dc3c | 394 | return i2c_probe(adapter, &addr_data, lm80_detect); |
1da177e4 LT |
395 | } |
396 | ||
0501a381 MH |
397 | static struct attribute *lm80_attributes[] = { |
398 | &dev_attr_in0_min.attr, | |
399 | &dev_attr_in1_min.attr, | |
400 | &dev_attr_in2_min.attr, | |
401 | &dev_attr_in3_min.attr, | |
402 | &dev_attr_in4_min.attr, | |
403 | &dev_attr_in5_min.attr, | |
404 | &dev_attr_in6_min.attr, | |
405 | &dev_attr_in0_max.attr, | |
406 | &dev_attr_in1_max.attr, | |
407 | &dev_attr_in2_max.attr, | |
408 | &dev_attr_in3_max.attr, | |
409 | &dev_attr_in4_max.attr, | |
410 | &dev_attr_in5_max.attr, | |
411 | &dev_attr_in6_max.attr, | |
412 | &dev_attr_in0_input.attr, | |
413 | &dev_attr_in1_input.attr, | |
414 | &dev_attr_in2_input.attr, | |
415 | &dev_attr_in3_input.attr, | |
416 | &dev_attr_in4_input.attr, | |
417 | &dev_attr_in5_input.attr, | |
418 | &dev_attr_in6_input.attr, | |
419 | &dev_attr_fan1_min.attr, | |
420 | &dev_attr_fan2_min.attr, | |
421 | &dev_attr_fan1_input.attr, | |
422 | &dev_attr_fan2_input.attr, | |
423 | &dev_attr_fan1_div.attr, | |
424 | &dev_attr_fan2_div.attr, | |
425 | &dev_attr_temp1_input.attr, | |
426 | &dev_attr_temp1_max.attr, | |
427 | &dev_attr_temp1_max_hyst.attr, | |
428 | &dev_attr_temp1_crit.attr, | |
429 | &dev_attr_temp1_crit_hyst.attr, | |
430 | &dev_attr_alarms.attr, | |
431 | ||
432 | NULL | |
433 | }; | |
434 | ||
435 | static const struct attribute_group lm80_group = { | |
436 | .attrs = lm80_attributes, | |
437 | }; | |
438 | ||
c49efcef | 439 | static int lm80_detect(struct i2c_adapter *adapter, int address, int kind) |
1da177e4 LT |
440 | { |
441 | int i, cur; | |
442 | struct i2c_client *new_client; | |
443 | struct lm80_data *data; | |
444 | int err = 0; | |
445 | const char *name; | |
446 | ||
447 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
448 | goto exit; | |
449 | ||
450 | /* OK. For now, we presume we have a valid client. We now create the | |
451 | client structure, even though we cannot fill it completely yet. | |
452 | But it allows us to access lm80_{read,write}_value. */ | |
ba9c2e8d | 453 | if (!(data = kzalloc(sizeof(struct lm80_data), GFP_KERNEL))) { |
1da177e4 LT |
454 | err = -ENOMEM; |
455 | goto exit; | |
456 | } | |
1da177e4 LT |
457 | |
458 | new_client = &data->client; | |
459 | i2c_set_clientdata(new_client, data); | |
460 | new_client->addr = address; | |
461 | new_client->adapter = adapter; | |
462 | new_client->driver = &lm80_driver; | |
463 | new_client->flags = 0; | |
464 | ||
465 | /* Now, we do the remaining detection. It is lousy. */ | |
466 | if (lm80_read_value(new_client, LM80_REG_ALARM2) & 0xc0) | |
467 | goto error_free; | |
468 | for (i = 0x2a; i <= 0x3d; i++) { | |
469 | cur = i2c_smbus_read_byte_data(new_client, i); | |
470 | if ((i2c_smbus_read_byte_data(new_client, i + 0x40) != cur) | |
471 | || (i2c_smbus_read_byte_data(new_client, i + 0x80) != cur) | |
472 | || (i2c_smbus_read_byte_data(new_client, i + 0xc0) != cur)) | |
473 | goto error_free; | |
474 | } | |
475 | ||
476 | /* Determine the chip type - only one kind supported! */ | |
477 | kind = lm80; | |
478 | name = "lm80"; | |
479 | ||
480 | /* Fill in the remaining client fields and put it into the global list */ | |
481 | strlcpy(new_client->name, name, I2C_NAME_SIZE); | |
482 | data->valid = 0; | |
9a61bf63 | 483 | mutex_init(&data->update_lock); |
1da177e4 LT |
484 | |
485 | /* Tell the I2C layer a new client has arrived */ | |
486 | if ((err = i2c_attach_client(new_client))) | |
487 | goto error_free; | |
488 | ||
489 | /* Initialize the LM80 chip */ | |
490 | lm80_init_client(new_client); | |
491 | ||
492 | /* A few vars need to be filled upon startup */ | |
493 | data->fan_min[0] = lm80_read_value(new_client, LM80_REG_FAN_MIN(1)); | |
494 | data->fan_min[1] = lm80_read_value(new_client, LM80_REG_FAN_MIN(2)); | |
495 | ||
496 | /* Register sysfs hooks */ | |
0501a381 MH |
497 | if ((err = sysfs_create_group(&new_client->dev.kobj, &lm80_group))) |
498 | goto error_detach; | |
499 | ||
1beeffe4 TJ |
500 | data->hwmon_dev = hwmon_device_register(&new_client->dev); |
501 | if (IS_ERR(data->hwmon_dev)) { | |
502 | err = PTR_ERR(data->hwmon_dev); | |
0501a381 | 503 | goto error_remove; |
943b0830 MH |
504 | } |
505 | ||
1da177e4 LT |
506 | return 0; |
507 | ||
0501a381 MH |
508 | error_remove: |
509 | sysfs_remove_group(&new_client->dev.kobj, &lm80_group); | |
943b0830 MH |
510 | error_detach: |
511 | i2c_detach_client(new_client); | |
1da177e4 LT |
512 | error_free: |
513 | kfree(data); | |
514 | exit: | |
515 | return err; | |
516 | } | |
517 | ||
518 | static int lm80_detach_client(struct i2c_client *client) | |
519 | { | |
943b0830 | 520 | struct lm80_data *data = i2c_get_clientdata(client); |
1da177e4 LT |
521 | int err; |
522 | ||
1beeffe4 | 523 | hwmon_device_unregister(data->hwmon_dev); |
0501a381 | 524 | sysfs_remove_group(&client->dev.kobj, &lm80_group); |
7bef5594 | 525 | if ((err = i2c_detach_client(client))) |
1da177e4 | 526 | return err; |
1da177e4 | 527 | |
943b0830 | 528 | kfree(data); |
1da177e4 LT |
529 | return 0; |
530 | } | |
531 | ||
532 | static int lm80_read_value(struct i2c_client *client, u8 reg) | |
533 | { | |
534 | return i2c_smbus_read_byte_data(client, reg); | |
535 | } | |
536 | ||
537 | static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value) | |
538 | { | |
539 | return i2c_smbus_write_byte_data(client, reg, value); | |
540 | } | |
541 | ||
542 | /* Called when we have found a new LM80. */ | |
543 | static void lm80_init_client(struct i2c_client *client) | |
544 | { | |
545 | /* Reset all except Watchdog values and last conversion values | |
546 | This sets fan-divs to 2, among others. This makes most other | |
547 | initializations unnecessary */ | |
548 | lm80_write_value(client, LM80_REG_CONFIG, 0x80); | |
549 | /* Set 11-bit temperature resolution */ | |
550 | lm80_write_value(client, LM80_REG_RES, 0x08); | |
551 | ||
552 | /* Start monitoring */ | |
553 | lm80_write_value(client, LM80_REG_CONFIG, 0x01); | |
554 | } | |
555 | ||
556 | static struct lm80_data *lm80_update_device(struct device *dev) | |
557 | { | |
558 | struct i2c_client *client = to_i2c_client(dev); | |
559 | struct lm80_data *data = i2c_get_clientdata(client); | |
560 | int i; | |
561 | ||
9a61bf63 | 562 | mutex_lock(&data->update_lock); |
1da177e4 LT |
563 | |
564 | if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { | |
565 | dev_dbg(&client->dev, "Starting lm80 update\n"); | |
566 | for (i = 0; i <= 6; i++) { | |
567 | data->in[i] = | |
568 | lm80_read_value(client, LM80_REG_IN(i)); | |
569 | data->in_min[i] = | |
570 | lm80_read_value(client, LM80_REG_IN_MIN(i)); | |
571 | data->in_max[i] = | |
572 | lm80_read_value(client, LM80_REG_IN_MAX(i)); | |
573 | } | |
574 | data->fan[0] = lm80_read_value(client, LM80_REG_FAN1); | |
575 | data->fan_min[0] = | |
576 | lm80_read_value(client, LM80_REG_FAN_MIN(1)); | |
577 | data->fan[1] = lm80_read_value(client, LM80_REG_FAN2); | |
578 | data->fan_min[1] = | |
579 | lm80_read_value(client, LM80_REG_FAN_MIN(2)); | |
580 | ||
581 | data->temp = | |
582 | (lm80_read_value(client, LM80_REG_TEMP) << 8) | | |
583 | (lm80_read_value(client, LM80_REG_RES) & 0xf0); | |
584 | data->temp_os_max = | |
585 | lm80_read_value(client, LM80_REG_TEMP_OS_MAX); | |
586 | data->temp_os_hyst = | |
587 | lm80_read_value(client, LM80_REG_TEMP_OS_HYST); | |
588 | data->temp_hot_max = | |
589 | lm80_read_value(client, LM80_REG_TEMP_HOT_MAX); | |
590 | data->temp_hot_hyst = | |
591 | lm80_read_value(client, LM80_REG_TEMP_HOT_HYST); | |
592 | ||
593 | i = lm80_read_value(client, LM80_REG_FANDIV); | |
594 | data->fan_div[0] = (i >> 2) & 0x03; | |
595 | data->fan_div[1] = (i >> 4) & 0x03; | |
596 | data->alarms = lm80_read_value(client, LM80_REG_ALARM1) + | |
597 | (lm80_read_value(client, LM80_REG_ALARM2) << 8); | |
598 | data->last_updated = jiffies; | |
599 | data->valid = 1; | |
600 | } | |
601 | ||
9a61bf63 | 602 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
603 | |
604 | return data; | |
605 | } | |
606 | ||
607 | static int __init sensors_lm80_init(void) | |
608 | { | |
609 | return i2c_add_driver(&lm80_driver); | |
610 | } | |
611 | ||
612 | static void __exit sensors_lm80_exit(void) | |
613 | { | |
614 | i2c_del_driver(&lm80_driver); | |
615 | } | |
616 | ||
617 | MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and " | |
618 | "Philip Edelbrock <phil@netroedge.com>"); | |
619 | MODULE_DESCRIPTION("LM80 driver"); | |
620 | MODULE_LICENSE("GPL"); | |
621 | ||
622 | module_init(sensors_lm80_init); | |
623 | module_exit(sensors_lm80_exit); |