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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 | ||
24 | #include <linux/config.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/jiffies.h> | |
29 | #include <linux/i2c.h> | |
30 | #include <linux/i2c-sensor.h> | |
31 | ||
32 | /* Addresses to scan */ | |
33 | static unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, | |
34 | 0x2d, 0x2e, 0x2f, I2C_CLIENT_END }; | |
35 | static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END }; | |
36 | ||
37 | /* Insmod parameters */ | |
38 | SENSORS_INSMOD_1(lm80); | |
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; | |
111 | struct semaphore update_lock; | |
112 | char valid; /* !=0 if following fields are valid */ | |
113 | unsigned long last_updated; /* In jiffies */ | |
114 | ||
115 | u8 in[7]; /* Register value */ | |
116 | u8 in_max[7]; /* Register value */ | |
117 | u8 in_min[7]; /* Register value */ | |
118 | u8 fan[2]; /* Register value */ | |
119 | u8 fan_min[2]; /* Register value */ | |
120 | u8 fan_div[2]; /* Register encoding, shifted right */ | |
121 | u16 temp; /* Register values, shifted right */ | |
122 | u8 temp_hot_max; /* Register value */ | |
123 | u8 temp_hot_hyst; /* Register value */ | |
124 | u8 temp_os_max; /* Register value */ | |
125 | u8 temp_os_hyst; /* Register value */ | |
126 | u16 alarms; /* Register encoding, combined */ | |
127 | }; | |
128 | ||
129 | /* | |
130 | * Functions declaration | |
131 | */ | |
132 | ||
133 | static int lm80_attach_adapter(struct i2c_adapter *adapter); | |
134 | static int lm80_detect(struct i2c_adapter *adapter, int address, int kind); | |
135 | static void lm80_init_client(struct i2c_client *client); | |
136 | static int lm80_detach_client(struct i2c_client *client); | |
137 | static struct lm80_data *lm80_update_device(struct device *dev); | |
138 | static int lm80_read_value(struct i2c_client *client, u8 reg); | |
139 | static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value); | |
140 | ||
141 | /* | |
142 | * Driver data (common to all clients) | |
143 | */ | |
144 | ||
145 | static struct i2c_driver lm80_driver = { | |
146 | .owner = THIS_MODULE, | |
147 | .name = "lm80", | |
148 | .id = I2C_DRIVERID_LM80, | |
149 | .flags = I2C_DF_NOTIFY, | |
150 | .attach_adapter = lm80_attach_adapter, | |
151 | .detach_client = lm80_detach_client, | |
152 | }; | |
153 | ||
154 | /* | |
155 | * Sysfs stuff | |
156 | */ | |
157 | ||
158 | #define show_in(suffix, value) \ | |
159 | static ssize_t show_in_##suffix(struct device *dev, char *buf) \ | |
160 | { \ | |
161 | struct lm80_data *data = lm80_update_device(dev); \ | |
162 | return sprintf(buf, "%d\n", IN_FROM_REG(data->value)); \ | |
163 | } | |
164 | show_in(min0, in_min[0]); | |
165 | show_in(min1, in_min[1]); | |
166 | show_in(min2, in_min[2]); | |
167 | show_in(min3, in_min[3]); | |
168 | show_in(min4, in_min[4]); | |
169 | show_in(min5, in_min[5]); | |
170 | show_in(min6, in_min[6]); | |
171 | show_in(max0, in_max[0]); | |
172 | show_in(max1, in_max[1]); | |
173 | show_in(max2, in_max[2]); | |
174 | show_in(max3, in_max[3]); | |
175 | show_in(max4, in_max[4]); | |
176 | show_in(max5, in_max[5]); | |
177 | show_in(max6, in_max[6]); | |
178 | show_in(input0, in[0]); | |
179 | show_in(input1, in[1]); | |
180 | show_in(input2, in[2]); | |
181 | show_in(input3, in[3]); | |
182 | show_in(input4, in[4]); | |
183 | show_in(input5, in[5]); | |
184 | show_in(input6, in[6]); | |
185 | ||
186 | #define set_in(suffix, value, reg) \ | |
187 | static ssize_t set_in_##suffix(struct device *dev, const char *buf, \ | |
188 | size_t count) \ | |
189 | { \ | |
190 | struct i2c_client *client = to_i2c_client(dev); \ | |
191 | struct lm80_data *data = i2c_get_clientdata(client); \ | |
192 | long val = simple_strtol(buf, NULL, 10); \ | |
193 | \ | |
194 | down(&data->update_lock);\ | |
195 | data->value = IN_TO_REG(val); \ | |
196 | lm80_write_value(client, reg, data->value); \ | |
197 | up(&data->update_lock);\ | |
198 | return count; \ | |
199 | } | |
200 | set_in(min0, in_min[0], LM80_REG_IN_MIN(0)); | |
201 | set_in(min1, in_min[1], LM80_REG_IN_MIN(1)); | |
202 | set_in(min2, in_min[2], LM80_REG_IN_MIN(2)); | |
203 | set_in(min3, in_min[3], LM80_REG_IN_MIN(3)); | |
204 | set_in(min4, in_min[4], LM80_REG_IN_MIN(4)); | |
205 | set_in(min5, in_min[5], LM80_REG_IN_MIN(5)); | |
206 | set_in(min6, in_min[6], LM80_REG_IN_MIN(6)); | |
207 | set_in(max0, in_max[0], LM80_REG_IN_MAX(0)); | |
208 | set_in(max1, in_max[1], LM80_REG_IN_MAX(1)); | |
209 | set_in(max2, in_max[2], LM80_REG_IN_MAX(2)); | |
210 | set_in(max3, in_max[3], LM80_REG_IN_MAX(3)); | |
211 | set_in(max4, in_max[4], LM80_REG_IN_MAX(4)); | |
212 | set_in(max5, in_max[5], LM80_REG_IN_MAX(5)); | |
213 | set_in(max6, in_max[6], LM80_REG_IN_MAX(6)); | |
214 | ||
215 | #define show_fan(suffix, value, div) \ | |
216 | static ssize_t show_fan_##suffix(struct device *dev, char *buf) \ | |
217 | { \ | |
218 | struct lm80_data *data = lm80_update_device(dev); \ | |
219 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->value, \ | |
220 | DIV_FROM_REG(data->div))); \ | |
221 | } | |
222 | show_fan(min1, fan_min[0], fan_div[0]); | |
223 | show_fan(min2, fan_min[1], fan_div[1]); | |
224 | show_fan(input1, fan[0], fan_div[0]); | |
225 | show_fan(input2, fan[1], fan_div[1]); | |
226 | ||
227 | #define show_fan_div(suffix, value) \ | |
228 | static ssize_t show_fan_div##suffix(struct device *dev, char *buf) \ | |
229 | { \ | |
230 | struct lm80_data *data = lm80_update_device(dev); \ | |
231 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->value)); \ | |
232 | } | |
233 | show_fan_div(1, fan_div[0]); | |
234 | show_fan_div(2, fan_div[1]); | |
235 | ||
236 | #define set_fan(suffix, value, reg, div) \ | |
237 | static ssize_t set_fan_##suffix(struct device *dev, const char *buf, \ | |
238 | size_t count) \ | |
239 | { \ | |
240 | struct i2c_client *client = to_i2c_client(dev); \ | |
241 | struct lm80_data *data = i2c_get_clientdata(client); \ | |
242 | long val = simple_strtoul(buf, NULL, 10); \ | |
243 | \ | |
244 | down(&data->update_lock);\ | |
245 | data->value = FAN_TO_REG(val, DIV_FROM_REG(data->div)); \ | |
246 | lm80_write_value(client, reg, data->value); \ | |
247 | up(&data->update_lock);\ | |
248 | return count; \ | |
249 | } | |
250 | set_fan(min1, fan_min[0], LM80_REG_FAN_MIN(1), fan_div[0]); | |
251 | set_fan(min2, fan_min[1], LM80_REG_FAN_MIN(2), fan_div[1]); | |
252 | ||
253 | /* Note: we save and restore the fan minimum here, because its value is | |
254 | determined in part by the fan divisor. This follows the principle of | |
255 | least suprise; the user doesn't expect the fan minimum to change just | |
256 | because the divisor changed. */ | |
257 | static ssize_t set_fan_div(struct device *dev, const char *buf, | |
258 | size_t count, int nr) | |
259 | { | |
260 | struct i2c_client *client = to_i2c_client(dev); | |
261 | struct lm80_data *data = i2c_get_clientdata(client); | |
262 | unsigned long min, val = simple_strtoul(buf, NULL, 10); | |
263 | u8 reg; | |
264 | ||
265 | /* Save fan_min */ | |
266 | down(&data->update_lock); | |
267 | min = FAN_FROM_REG(data->fan_min[nr], | |
268 | DIV_FROM_REG(data->fan_div[nr])); | |
269 | ||
270 | switch (val) { | |
271 | case 1: data->fan_div[nr] = 0; break; | |
272 | case 2: data->fan_div[nr] = 1; break; | |
273 | case 4: data->fan_div[nr] = 2; break; | |
274 | case 8: data->fan_div[nr] = 3; break; | |
275 | default: | |
276 | dev_err(&client->dev, "fan_div value %ld not " | |
277 | "supported. Choose one of 1, 2, 4 or 8!\n", val); | |
278 | up(&data->update_lock); | |
279 | return -EINVAL; | |
280 | } | |
281 | ||
282 | reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1)))) | |
283 | | (data->fan_div[nr] << (2 * (nr + 1))); | |
284 | lm80_write_value(client, LM80_REG_FANDIV, reg); | |
285 | ||
286 | /* Restore fan_min */ | |
287 | data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); | |
288 | lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]); | |
289 | up(&data->update_lock); | |
290 | ||
291 | return count; | |
292 | } | |
293 | ||
294 | #define set_fan_div(number) \ | |
295 | static ssize_t set_fan_div##number(struct device *dev, const char *buf, \ | |
296 | size_t count) \ | |
297 | { \ | |
298 | return set_fan_div(dev, buf, count, number - 1); \ | |
299 | } | |
300 | set_fan_div(1); | |
301 | set_fan_div(2); | |
302 | ||
303 | static ssize_t show_temp_input1(struct device *dev, char *buf) | |
304 | { | |
305 | struct lm80_data *data = lm80_update_device(dev); | |
306 | return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp)); | |
307 | } | |
308 | ||
309 | #define show_temp(suffix, value) \ | |
310 | static ssize_t show_temp_##suffix(struct device *dev, char *buf) \ | |
311 | { \ | |
312 | struct lm80_data *data = lm80_update_device(dev); \ | |
313 | return sprintf(buf, "%d\n", TEMP_LIMIT_FROM_REG(data->value)); \ | |
314 | } | |
315 | show_temp(hot_max, temp_hot_max); | |
316 | show_temp(hot_hyst, temp_hot_hyst); | |
317 | show_temp(os_max, temp_os_max); | |
318 | show_temp(os_hyst, temp_os_hyst); | |
319 | ||
320 | #define set_temp(suffix, value, reg) \ | |
321 | static ssize_t set_temp_##suffix(struct device *dev, const char *buf, \ | |
322 | size_t count) \ | |
323 | { \ | |
324 | struct i2c_client *client = to_i2c_client(dev); \ | |
325 | struct lm80_data *data = i2c_get_clientdata(client); \ | |
326 | long val = simple_strtoul(buf, NULL, 10); \ | |
327 | \ | |
328 | down(&data->update_lock); \ | |
329 | data->value = TEMP_LIMIT_TO_REG(val); \ | |
330 | lm80_write_value(client, reg, data->value); \ | |
331 | up(&data->update_lock); \ | |
332 | return count; \ | |
333 | } | |
334 | set_temp(hot_max, temp_hot_max, LM80_REG_TEMP_HOT_MAX); | |
335 | set_temp(hot_hyst, temp_hot_hyst, LM80_REG_TEMP_HOT_HYST); | |
336 | set_temp(os_max, temp_os_max, LM80_REG_TEMP_OS_MAX); | |
337 | set_temp(os_hyst, temp_os_hyst, LM80_REG_TEMP_OS_HYST); | |
338 | ||
339 | static ssize_t show_alarms(struct device *dev, char *buf) | |
340 | { | |
341 | struct lm80_data *data = lm80_update_device(dev); | |
342 | return sprintf(buf, "%u\n", data->alarms); | |
343 | } | |
344 | ||
345 | static DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min0, set_in_min0); | |
346 | static DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min1, set_in_min1); | |
347 | static DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min2, set_in_min2); | |
348 | static DEVICE_ATTR(in3_min, S_IWUSR | S_IRUGO, show_in_min3, set_in_min3); | |
349 | static DEVICE_ATTR(in4_min, S_IWUSR | S_IRUGO, show_in_min4, set_in_min4); | |
350 | static DEVICE_ATTR(in5_min, S_IWUSR | S_IRUGO, show_in_min5, set_in_min5); | |
351 | static DEVICE_ATTR(in6_min, S_IWUSR | S_IRUGO, show_in_min6, set_in_min6); | |
352 | static DEVICE_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max0, set_in_max0); | |
353 | static DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max1, set_in_max1); | |
354 | static DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max2, set_in_max2); | |
355 | static DEVICE_ATTR(in3_max, S_IWUSR | S_IRUGO, show_in_max3, set_in_max3); | |
356 | static DEVICE_ATTR(in4_max, S_IWUSR | S_IRUGO, show_in_max4, set_in_max4); | |
357 | static DEVICE_ATTR(in5_max, S_IWUSR | S_IRUGO, show_in_max5, set_in_max5); | |
358 | static DEVICE_ATTR(in6_max, S_IWUSR | S_IRUGO, show_in_max6, set_in_max6); | |
359 | static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL); | |
360 | static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL); | |
361 | static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL); | |
362 | static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL); | |
363 | static DEVICE_ATTR(in4_input, S_IRUGO, show_in_input4, NULL); | |
364 | static DEVICE_ATTR(in5_input, S_IRUGO, show_in_input5, NULL); | |
365 | static DEVICE_ATTR(in6_input, S_IRUGO, show_in_input6, NULL); | |
366 | static DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min1, | |
367 | set_fan_min1); | |
368 | static DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min2, | |
369 | set_fan_min2); | |
370 | static DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input1, NULL); | |
371 | static DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input2, NULL); | |
372 | static DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div1, set_fan_div1); | |
373 | static DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div2, set_fan_div2); | |
374 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL); | |
375 | static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_hot_max, | |
376 | set_temp_hot_max); | |
377 | static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp_hot_hyst, | |
378 | set_temp_hot_hyst); | |
379 | static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_os_max, | |
380 | set_temp_os_max); | |
381 | static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_os_hyst, | |
382 | set_temp_os_hyst); | |
383 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
384 | ||
385 | /* | |
386 | * Real code | |
387 | */ | |
388 | ||
389 | static int lm80_attach_adapter(struct i2c_adapter *adapter) | |
390 | { | |
391 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
392 | return 0; | |
393 | return i2c_detect(adapter, &addr_data, lm80_detect); | |
394 | } | |
395 | ||
396 | int lm80_detect(struct i2c_adapter *adapter, int address, int kind) | |
397 | { | |
398 | int i, cur; | |
399 | struct i2c_client *new_client; | |
400 | struct lm80_data *data; | |
401 | int err = 0; | |
402 | const char *name; | |
403 | ||
404 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
405 | goto exit; | |
406 | ||
407 | /* OK. For now, we presume we have a valid client. We now create the | |
408 | client structure, even though we cannot fill it completely yet. | |
409 | But it allows us to access lm80_{read,write}_value. */ | |
410 | if (!(data = kmalloc(sizeof(struct lm80_data), GFP_KERNEL))) { | |
411 | err = -ENOMEM; | |
412 | goto exit; | |
413 | } | |
414 | memset(data, 0, sizeof(struct lm80_data)); | |
415 | ||
416 | new_client = &data->client; | |
417 | i2c_set_clientdata(new_client, data); | |
418 | new_client->addr = address; | |
419 | new_client->adapter = adapter; | |
420 | new_client->driver = &lm80_driver; | |
421 | new_client->flags = 0; | |
422 | ||
423 | /* Now, we do the remaining detection. It is lousy. */ | |
424 | if (lm80_read_value(new_client, LM80_REG_ALARM2) & 0xc0) | |
425 | goto error_free; | |
426 | for (i = 0x2a; i <= 0x3d; i++) { | |
427 | cur = i2c_smbus_read_byte_data(new_client, i); | |
428 | if ((i2c_smbus_read_byte_data(new_client, i + 0x40) != cur) | |
429 | || (i2c_smbus_read_byte_data(new_client, i + 0x80) != cur) | |
430 | || (i2c_smbus_read_byte_data(new_client, i + 0xc0) != cur)) | |
431 | goto error_free; | |
432 | } | |
433 | ||
434 | /* Determine the chip type - only one kind supported! */ | |
435 | kind = lm80; | |
436 | name = "lm80"; | |
437 | ||
438 | /* Fill in the remaining client fields and put it into the global list */ | |
439 | strlcpy(new_client->name, name, I2C_NAME_SIZE); | |
440 | data->valid = 0; | |
441 | init_MUTEX(&data->update_lock); | |
442 | ||
443 | /* Tell the I2C layer a new client has arrived */ | |
444 | if ((err = i2c_attach_client(new_client))) | |
445 | goto error_free; | |
446 | ||
447 | /* Initialize the LM80 chip */ | |
448 | lm80_init_client(new_client); | |
449 | ||
450 | /* A few vars need to be filled upon startup */ | |
451 | data->fan_min[0] = lm80_read_value(new_client, LM80_REG_FAN_MIN(1)); | |
452 | data->fan_min[1] = lm80_read_value(new_client, LM80_REG_FAN_MIN(2)); | |
453 | ||
454 | /* Register sysfs hooks */ | |
455 | device_create_file(&new_client->dev, &dev_attr_in0_min); | |
456 | device_create_file(&new_client->dev, &dev_attr_in1_min); | |
457 | device_create_file(&new_client->dev, &dev_attr_in2_min); | |
458 | device_create_file(&new_client->dev, &dev_attr_in3_min); | |
459 | device_create_file(&new_client->dev, &dev_attr_in4_min); | |
460 | device_create_file(&new_client->dev, &dev_attr_in5_min); | |
461 | device_create_file(&new_client->dev, &dev_attr_in6_min); | |
462 | device_create_file(&new_client->dev, &dev_attr_in0_max); | |
463 | device_create_file(&new_client->dev, &dev_attr_in1_max); | |
464 | device_create_file(&new_client->dev, &dev_attr_in2_max); | |
465 | device_create_file(&new_client->dev, &dev_attr_in3_max); | |
466 | device_create_file(&new_client->dev, &dev_attr_in4_max); | |
467 | device_create_file(&new_client->dev, &dev_attr_in5_max); | |
468 | device_create_file(&new_client->dev, &dev_attr_in6_max); | |
469 | device_create_file(&new_client->dev, &dev_attr_in0_input); | |
470 | device_create_file(&new_client->dev, &dev_attr_in1_input); | |
471 | device_create_file(&new_client->dev, &dev_attr_in2_input); | |
472 | device_create_file(&new_client->dev, &dev_attr_in3_input); | |
473 | device_create_file(&new_client->dev, &dev_attr_in4_input); | |
474 | device_create_file(&new_client->dev, &dev_attr_in5_input); | |
475 | device_create_file(&new_client->dev, &dev_attr_in6_input); | |
476 | device_create_file(&new_client->dev, &dev_attr_fan1_min); | |
477 | device_create_file(&new_client->dev, &dev_attr_fan2_min); | |
478 | device_create_file(&new_client->dev, &dev_attr_fan1_input); | |
479 | device_create_file(&new_client->dev, &dev_attr_fan2_input); | |
480 | device_create_file(&new_client->dev, &dev_attr_fan1_div); | |
481 | device_create_file(&new_client->dev, &dev_attr_fan2_div); | |
482 | device_create_file(&new_client->dev, &dev_attr_temp1_input); | |
483 | device_create_file(&new_client->dev, &dev_attr_temp1_max); | |
484 | device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst); | |
485 | device_create_file(&new_client->dev, &dev_attr_temp1_crit); | |
486 | device_create_file(&new_client->dev, &dev_attr_temp1_crit_hyst); | |
487 | device_create_file(&new_client->dev, &dev_attr_alarms); | |
488 | ||
489 | return 0; | |
490 | ||
491 | error_free: | |
492 | kfree(data); | |
493 | exit: | |
494 | return err; | |
495 | } | |
496 | ||
497 | static int lm80_detach_client(struct i2c_client *client) | |
498 | { | |
499 | int err; | |
500 | ||
501 | if ((err = i2c_detach_client(client))) { | |
502 | dev_err(&client->dev, "Client deregistration failed, " | |
503 | "client not detached.\n"); | |
504 | return err; | |
505 | } | |
506 | ||
507 | kfree(i2c_get_clientdata(client)); | |
508 | return 0; | |
509 | } | |
510 | ||
511 | static int lm80_read_value(struct i2c_client *client, u8 reg) | |
512 | { | |
513 | return i2c_smbus_read_byte_data(client, reg); | |
514 | } | |
515 | ||
516 | static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value) | |
517 | { | |
518 | return i2c_smbus_write_byte_data(client, reg, value); | |
519 | } | |
520 | ||
521 | /* Called when we have found a new LM80. */ | |
522 | static void lm80_init_client(struct i2c_client *client) | |
523 | { | |
524 | /* Reset all except Watchdog values and last conversion values | |
525 | This sets fan-divs to 2, among others. This makes most other | |
526 | initializations unnecessary */ | |
527 | lm80_write_value(client, LM80_REG_CONFIG, 0x80); | |
528 | /* Set 11-bit temperature resolution */ | |
529 | lm80_write_value(client, LM80_REG_RES, 0x08); | |
530 | ||
531 | /* Start monitoring */ | |
532 | lm80_write_value(client, LM80_REG_CONFIG, 0x01); | |
533 | } | |
534 | ||
535 | static struct lm80_data *lm80_update_device(struct device *dev) | |
536 | { | |
537 | struct i2c_client *client = to_i2c_client(dev); | |
538 | struct lm80_data *data = i2c_get_clientdata(client); | |
539 | int i; | |
540 | ||
541 | down(&data->update_lock); | |
542 | ||
543 | if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { | |
544 | dev_dbg(&client->dev, "Starting lm80 update\n"); | |
545 | for (i = 0; i <= 6; i++) { | |
546 | data->in[i] = | |
547 | lm80_read_value(client, LM80_REG_IN(i)); | |
548 | data->in_min[i] = | |
549 | lm80_read_value(client, LM80_REG_IN_MIN(i)); | |
550 | data->in_max[i] = | |
551 | lm80_read_value(client, LM80_REG_IN_MAX(i)); | |
552 | } | |
553 | data->fan[0] = lm80_read_value(client, LM80_REG_FAN1); | |
554 | data->fan_min[0] = | |
555 | lm80_read_value(client, LM80_REG_FAN_MIN(1)); | |
556 | data->fan[1] = lm80_read_value(client, LM80_REG_FAN2); | |
557 | data->fan_min[1] = | |
558 | lm80_read_value(client, LM80_REG_FAN_MIN(2)); | |
559 | ||
560 | data->temp = | |
561 | (lm80_read_value(client, LM80_REG_TEMP) << 8) | | |
562 | (lm80_read_value(client, LM80_REG_RES) & 0xf0); | |
563 | data->temp_os_max = | |
564 | lm80_read_value(client, LM80_REG_TEMP_OS_MAX); | |
565 | data->temp_os_hyst = | |
566 | lm80_read_value(client, LM80_REG_TEMP_OS_HYST); | |
567 | data->temp_hot_max = | |
568 | lm80_read_value(client, LM80_REG_TEMP_HOT_MAX); | |
569 | data->temp_hot_hyst = | |
570 | lm80_read_value(client, LM80_REG_TEMP_HOT_HYST); | |
571 | ||
572 | i = lm80_read_value(client, LM80_REG_FANDIV); | |
573 | data->fan_div[0] = (i >> 2) & 0x03; | |
574 | data->fan_div[1] = (i >> 4) & 0x03; | |
575 | data->alarms = lm80_read_value(client, LM80_REG_ALARM1) + | |
576 | (lm80_read_value(client, LM80_REG_ALARM2) << 8); | |
577 | data->last_updated = jiffies; | |
578 | data->valid = 1; | |
579 | } | |
580 | ||
581 | up(&data->update_lock); | |
582 | ||
583 | return data; | |
584 | } | |
585 | ||
586 | static int __init sensors_lm80_init(void) | |
587 | { | |
588 | return i2c_add_driver(&lm80_driver); | |
589 | } | |
590 | ||
591 | static void __exit sensors_lm80_exit(void) | |
592 | { | |
593 | i2c_del_driver(&lm80_driver); | |
594 | } | |
595 | ||
596 | MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and " | |
597 | "Philip Edelbrock <phil@netroedge.com>"); | |
598 | MODULE_DESCRIPTION("LM80 driver"); | |
599 | MODULE_LICENSE("GPL"); | |
600 | ||
601 | module_init(sensors_lm80_init); | |
602 | module_exit(sensors_lm80_exit); |