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1da177e4 LT |
1 | /* |
2 | * lm80.c - From lm_sensors, Linux kernel modules for hardware | |
1160631b | 3 | * monitoring |
1da177e4 | 4 | * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl> |
1160631b | 5 | * and Philip Edelbrock <phil@netroedge.com> |
1da177e4 LT |
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 | 29 | #include <linux/hwmon.h> |
f8181762 | 30 | #include <linux/hwmon-sysfs.h> |
943b0830 | 31 | #include <linux/err.h> |
9a61bf63 | 32 | #include <linux/mutex.h> |
1da177e4 LT |
33 | |
34 | /* Addresses to scan */ | |
25e9c86d MH |
35 | static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, |
36 | 0x2e, 0x2f, I2C_CLIENT_END }; | |
1da177e4 | 37 | |
1da177e4 LT |
38 | /* Many LM80 constants specified below */ |
39 | ||
40 | /* The LM80 registers */ | |
41 | #define LM80_REG_IN_MAX(nr) (0x2a + (nr) * 2) | |
42 | #define LM80_REG_IN_MIN(nr) (0x2b + (nr) * 2) | |
43 | #define LM80_REG_IN(nr) (0x20 + (nr)) | |
44 | ||
45 | #define LM80_REG_FAN1 0x28 | |
46 | #define LM80_REG_FAN2 0x29 | |
47 | #define LM80_REG_FAN_MIN(nr) (0x3b + (nr)) | |
48 | ||
49 | #define LM80_REG_TEMP 0x27 | |
50 | #define LM80_REG_TEMP_HOT_MAX 0x38 | |
51 | #define LM80_REG_TEMP_HOT_HYST 0x39 | |
52 | #define LM80_REG_TEMP_OS_MAX 0x3a | |
53 | #define LM80_REG_TEMP_OS_HYST 0x3b | |
54 | ||
55 | #define LM80_REG_CONFIG 0x00 | |
56 | #define LM80_REG_ALARM1 0x01 | |
57 | #define LM80_REG_ALARM2 0x02 | |
58 | #define LM80_REG_MASK1 0x03 | |
59 | #define LM80_REG_MASK2 0x04 | |
60 | #define LM80_REG_FANDIV 0x05 | |
61 | #define LM80_REG_RES 0x06 | |
62 | ||
9908ad4c JD |
63 | #define LM96080_REG_CONV_RATE 0x07 |
64 | #define LM96080_REG_MAN_ID 0x3e | |
65 | #define LM96080_REG_DEV_ID 0x3f | |
66 | ||
1da177e4 | 67 | |
1160631b GR |
68 | /* |
69 | * Conversions. Rounding and limit checking is only done on the TO_REG | |
70 | * variants. Note that you should be a bit careful with which arguments | |
71 | * these macros are called: arguments may be evaluated more than once. | |
72 | * Fixing this is just not worth it. | |
73 | */ | |
1da177e4 | 74 | |
2a844c14 | 75 | #define IN_TO_REG(val) (clamp_val(((val) + 5) / 10, 0, 255)) |
66b3b1f7 | 76 | #define IN_FROM_REG(val) ((val) * 10) |
1da177e4 LT |
77 | |
78 | static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div) | |
79 | { | |
80 | if (rpm == 0) | |
81 | return 255; | |
2a844c14 GR |
82 | rpm = clamp_val(rpm, 1, 1000000); |
83 | return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254); | |
1da177e4 LT |
84 | } |
85 | ||
66b3b1f7 FM |
86 | #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \ |
87 | (val) == 255 ? 0 : 1350000/((div) * (val))) | |
1da177e4 LT |
88 | |
89 | static inline long TEMP_FROM_REG(u16 temp) | |
90 | { | |
91 | long res; | |
92 | ||
93 | temp >>= 4; | |
94 | if (temp < 0x0800) | |
95 | res = 625 * (long) temp; | |
96 | else | |
97 | res = ((long) temp - 0x01000) * 625; | |
98 | ||
99 | return res / 10; | |
100 | } | |
101 | ||
66b3b1f7 FM |
102 | #define TEMP_LIMIT_FROM_REG(val) (((val) > 0x80 ? \ |
103 | (val) - 0x100 : (val)) * 1000) | |
1da177e4 | 104 | |
2a844c14 | 105 | #define TEMP_LIMIT_TO_REG(val) clamp_val((val) < 0 ? \ |
66b3b1f7 | 106 | ((val) - 500) / 1000 : ((val) + 500) / 1000, 0, 255) |
1da177e4 LT |
107 | |
108 | #define DIV_FROM_REG(val) (1 << (val)) | |
109 | ||
110 | /* | |
111 | * Client data (each client gets its own) | |
112 | */ | |
113 | ||
114 | struct lm80_data { | |
1beeffe4 | 115 | struct device *hwmon_dev; |
9a61bf63 | 116 | struct mutex update_lock; |
96585f1a | 117 | char error; /* !=0 if error occurred during last update */ |
1da177e4 LT |
118 | char valid; /* !=0 if following fields are valid */ |
119 | unsigned long last_updated; /* In jiffies */ | |
120 | ||
121 | u8 in[7]; /* Register value */ | |
122 | u8 in_max[7]; /* Register value */ | |
123 | u8 in_min[7]; /* Register value */ | |
124 | u8 fan[2]; /* Register value */ | |
125 | u8 fan_min[2]; /* Register value */ | |
126 | u8 fan_div[2]; /* Register encoding, shifted right */ | |
127 | u16 temp; /* Register values, shifted right */ | |
128 | u8 temp_hot_max; /* Register value */ | |
129 | u8 temp_hot_hyst; /* Register value */ | |
130 | u8 temp_os_max; /* Register value */ | |
131 | u8 temp_os_hyst; /* Register value */ | |
132 | u16 alarms; /* Register encoding, combined */ | |
133 | }; | |
134 | ||
6cc37ee5 | 135 | /* |
1da177e4 LT |
136 | * Functions declaration |
137 | */ | |
138 | ||
8c8bacc8 JD |
139 | static int lm80_probe(struct i2c_client *client, |
140 | const struct i2c_device_id *id); | |
310ec792 | 141 | static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info); |
1da177e4 | 142 | static void lm80_init_client(struct i2c_client *client); |
8c8bacc8 | 143 | static int lm80_remove(struct i2c_client *client); |
1da177e4 LT |
144 | static struct lm80_data *lm80_update_device(struct device *dev); |
145 | static int lm80_read_value(struct i2c_client *client, u8 reg); | |
146 | static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value); | |
147 | ||
148 | /* | |
149 | * Driver data (common to all clients) | |
150 | */ | |
151 | ||
8c8bacc8 | 152 | static const struct i2c_device_id lm80_id[] = { |
1f86df49 | 153 | { "lm80", 0 }, |
9908ad4c | 154 | { "lm96080", 1 }, |
8c8bacc8 JD |
155 | { } |
156 | }; | |
157 | MODULE_DEVICE_TABLE(i2c, lm80_id); | |
158 | ||
1da177e4 | 159 | static struct i2c_driver lm80_driver = { |
8c8bacc8 | 160 | .class = I2C_CLASS_HWMON, |
cdaf7934 | 161 | .driver = { |
cdaf7934 LR |
162 | .name = "lm80", |
163 | }, | |
8c8bacc8 JD |
164 | .probe = lm80_probe, |
165 | .remove = lm80_remove, | |
166 | .id_table = lm80_id, | |
167 | .detect = lm80_detect, | |
c3813d6a | 168 | .address_list = normal_i2c, |
1da177e4 LT |
169 | }; |
170 | ||
171 | /* | |
172 | * Sysfs stuff | |
173 | */ | |
174 | ||
175 | #define show_in(suffix, value) \ | |
66b3b1f7 FM |
176 | static ssize_t show_in_##suffix(struct device *dev, \ |
177 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 178 | { \ |
f8181762 | 179 | int nr = to_sensor_dev_attr(attr)->index; \ |
1da177e4 | 180 | struct lm80_data *data = lm80_update_device(dev); \ |
2faaa931 FM |
181 | if (IS_ERR(data)) \ |
182 | return PTR_ERR(data); \ | |
f8181762 | 183 | return sprintf(buf, "%d\n", IN_FROM_REG(data->value[nr])); \ |
1da177e4 | 184 | } |
f8181762 JD |
185 | show_in(min, in_min) |
186 | show_in(max, in_max) | |
187 | show_in(input, in) | |
1da177e4 LT |
188 | |
189 | #define set_in(suffix, value, reg) \ | |
66b3b1f7 FM |
190 | static ssize_t set_in_##suffix(struct device *dev, \ |
191 | struct device_attribute *attr, const char *buf, size_t count) \ | |
1da177e4 | 192 | { \ |
f8181762 | 193 | int nr = to_sensor_dev_attr(attr)->index; \ |
1da177e4 LT |
194 | struct i2c_client *client = to_i2c_client(dev); \ |
195 | struct lm80_data *data = i2c_get_clientdata(client); \ | |
6a9e7c4c FM |
196 | long val; \ |
197 | int err = kstrtol(buf, 10, &val); \ | |
198 | if (err < 0) \ | |
199 | return err; \ | |
66b3b1f7 | 200 | \ |
9a61bf63 | 201 | mutex_lock(&data->update_lock);\ |
f8181762 JD |
202 | data->value[nr] = IN_TO_REG(val); \ |
203 | lm80_write_value(client, reg(nr), data->value[nr]); \ | |
9a61bf63 | 204 | mutex_unlock(&data->update_lock);\ |
1da177e4 LT |
205 | return count; \ |
206 | } | |
f8181762 JD |
207 | set_in(min, in_min, LM80_REG_IN_MIN) |
208 | set_in(max, in_max, LM80_REG_IN_MAX) | |
209 | ||
210 | #define show_fan(suffix, value) \ | |
66b3b1f7 FM |
211 | static ssize_t show_fan_##suffix(struct device *dev, \ |
212 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 213 | { \ |
f8181762 | 214 | int nr = to_sensor_dev_attr(attr)->index; \ |
1da177e4 | 215 | struct lm80_data *data = lm80_update_device(dev); \ |
2faaa931 FM |
216 | if (IS_ERR(data)) \ |
217 | return PTR_ERR(data); \ | |
f8181762 JD |
218 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->value[nr], \ |
219 | DIV_FROM_REG(data->fan_div[nr]))); \ | |
1da177e4 | 220 | } |
f8181762 JD |
221 | show_fan(min, fan_min) |
222 | show_fan(input, fan) | |
1da177e4 | 223 | |
f8181762 JD |
224 | static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, |
225 | char *buf) | |
226 | { | |
227 | int nr = to_sensor_dev_attr(attr)->index; | |
228 | struct lm80_data *data = lm80_update_device(dev); | |
2faaa931 FM |
229 | if (IS_ERR(data)) |
230 | return PTR_ERR(data); | |
f8181762 | 231 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); |
1da177e4 | 232 | } |
1da177e4 | 233 | |
f8181762 JD |
234 | static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, |
235 | const char *buf, size_t count) | |
236 | { | |
237 | int nr = to_sensor_dev_attr(attr)->index; | |
238 | struct i2c_client *client = to_i2c_client(dev); | |
239 | struct lm80_data *data = i2c_get_clientdata(client); | |
6a9e7c4c FM |
240 | unsigned long val; |
241 | int err = kstrtoul(buf, 10, &val); | |
242 | if (err < 0) | |
243 | return err; | |
f8181762 JD |
244 | |
245 | mutex_lock(&data->update_lock); | |
246 | data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); | |
247 | lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]); | |
248 | mutex_unlock(&data->update_lock); | |
249 | return count; | |
1da177e4 | 250 | } |
1da177e4 | 251 | |
1160631b GR |
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 surprise; the user doesn't expect the fan minimum to change just | |
256 | * because the divisor changed. | |
257 | */ | |
f8181762 JD |
258 | static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, |
259 | const char *buf, size_t count) | |
1da177e4 | 260 | { |
f8181762 | 261 | int nr = to_sensor_dev_attr(attr)->index; |
1da177e4 LT |
262 | struct i2c_client *client = to_i2c_client(dev); |
263 | struct lm80_data *data = i2c_get_clientdata(client); | |
6a9e7c4c | 264 | unsigned long min, val; |
1da177e4 | 265 | u8 reg; |
6a9e7c4c FM |
266 | int err = kstrtoul(buf, 10, &val); |
267 | if (err < 0) | |
268 | return err; | |
1da177e4 LT |
269 | |
270 | /* Save fan_min */ | |
9a61bf63 | 271 | mutex_lock(&data->update_lock); |
1da177e4 LT |
272 | min = FAN_FROM_REG(data->fan_min[nr], |
273 | DIV_FROM_REG(data->fan_div[nr])); | |
274 | ||
275 | switch (val) { | |
66b3b1f7 FM |
276 | case 1: |
277 | data->fan_div[nr] = 0; | |
278 | break; | |
279 | case 2: | |
280 | data->fan_div[nr] = 1; | |
281 | break; | |
282 | case 4: | |
283 | data->fan_div[nr] = 2; | |
284 | break; | |
285 | case 8: | |
286 | data->fan_div[nr] = 3; | |
287 | break; | |
1da177e4 | 288 | default: |
b55f3757 GR |
289 | dev_err(&client->dev, |
290 | "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", | |
291 | val); | |
9a61bf63 | 292 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
293 | return -EINVAL; |
294 | } | |
295 | ||
296 | reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1)))) | |
297 | | (data->fan_div[nr] << (2 * (nr + 1))); | |
298 | lm80_write_value(client, LM80_REG_FANDIV, reg); | |
299 | ||
300 | /* Restore fan_min */ | |
301 | data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); | |
302 | lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]); | |
9a61bf63 | 303 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
304 | |
305 | return count; | |
306 | } | |
307 | ||
66b3b1f7 FM |
308 | static ssize_t show_temp_input1(struct device *dev, |
309 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
310 | { |
311 | struct lm80_data *data = lm80_update_device(dev); | |
2faaa931 FM |
312 | if (IS_ERR(data)) |
313 | return PTR_ERR(data); | |
1da177e4 LT |
314 | return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp)); |
315 | } | |
316 | ||
317 | #define show_temp(suffix, value) \ | |
66b3b1f7 FM |
318 | static ssize_t show_temp_##suffix(struct device *dev, \ |
319 | struct device_attribute *attr, char *buf) \ | |
1da177e4 LT |
320 | { \ |
321 | struct lm80_data *data = lm80_update_device(dev); \ | |
2faaa931 FM |
322 | if (IS_ERR(data)) \ |
323 | return PTR_ERR(data); \ | |
1da177e4 LT |
324 | return sprintf(buf, "%d\n", TEMP_LIMIT_FROM_REG(data->value)); \ |
325 | } | |
326 | show_temp(hot_max, temp_hot_max); | |
327 | show_temp(hot_hyst, temp_hot_hyst); | |
328 | show_temp(os_max, temp_os_max); | |
329 | show_temp(os_hyst, temp_os_hyst); | |
330 | ||
331 | #define set_temp(suffix, value, reg) \ | |
66b3b1f7 FM |
332 | static ssize_t set_temp_##suffix(struct device *dev, \ |
333 | struct device_attribute *attr, const char *buf, size_t count) \ | |
1da177e4 LT |
334 | { \ |
335 | struct i2c_client *client = to_i2c_client(dev); \ | |
336 | struct lm80_data *data = i2c_get_clientdata(client); \ | |
6a9e7c4c FM |
337 | long val; \ |
338 | int err = kstrtol(buf, 10, &val); \ | |
339 | if (err < 0) \ | |
340 | return err; \ | |
66b3b1f7 | 341 | \ |
9a61bf63 | 342 | mutex_lock(&data->update_lock); \ |
1da177e4 LT |
343 | data->value = TEMP_LIMIT_TO_REG(val); \ |
344 | lm80_write_value(client, reg, data->value); \ | |
9a61bf63 | 345 | mutex_unlock(&data->update_lock); \ |
1da177e4 LT |
346 | return count; \ |
347 | } | |
348 | set_temp(hot_max, temp_hot_max, LM80_REG_TEMP_HOT_MAX); | |
349 | set_temp(hot_hyst, temp_hot_hyst, LM80_REG_TEMP_HOT_HYST); | |
350 | set_temp(os_max, temp_os_max, LM80_REG_TEMP_OS_MAX); | |
351 | set_temp(os_hyst, temp_os_hyst, LM80_REG_TEMP_OS_HYST); | |
352 | ||
6cc37ee5 JD |
353 | static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, |
354 | char *buf) | |
1da177e4 LT |
355 | { |
356 | struct lm80_data *data = lm80_update_device(dev); | |
2faaa931 FM |
357 | if (IS_ERR(data)) |
358 | return PTR_ERR(data); | |
1da177e4 LT |
359 | return sprintf(buf, "%u\n", data->alarms); |
360 | } | |
361 | ||
e84542f5 JD |
362 | static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, |
363 | char *buf) | |
364 | { | |
365 | int bitnr = to_sensor_dev_attr(attr)->index; | |
366 | struct lm80_data *data = lm80_update_device(dev); | |
2faaa931 FM |
367 | if (IS_ERR(data)) |
368 | return PTR_ERR(data); | |
e84542f5 JD |
369 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); |
370 | } | |
371 | ||
f8181762 JD |
372 | static SENSOR_DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO, |
373 | show_in_min, set_in_min, 0); | |
374 | static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, | |
375 | show_in_min, set_in_min, 1); | |
376 | static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, | |
377 | show_in_min, set_in_min, 2); | |
378 | static SENSOR_DEVICE_ATTR(in3_min, S_IWUSR | S_IRUGO, | |
379 | show_in_min, set_in_min, 3); | |
380 | static SENSOR_DEVICE_ATTR(in4_min, S_IWUSR | S_IRUGO, | |
381 | show_in_min, set_in_min, 4); | |
382 | static SENSOR_DEVICE_ATTR(in5_min, S_IWUSR | S_IRUGO, | |
383 | show_in_min, set_in_min, 5); | |
384 | static SENSOR_DEVICE_ATTR(in6_min, S_IWUSR | S_IRUGO, | |
385 | show_in_min, set_in_min, 6); | |
386 | static SENSOR_DEVICE_ATTR(in0_max, S_IWUSR | S_IRUGO, | |
387 | show_in_max, set_in_max, 0); | |
388 | static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, | |
389 | show_in_max, set_in_max, 1); | |
390 | static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, | |
391 | show_in_max, set_in_max, 2); | |
392 | static SENSOR_DEVICE_ATTR(in3_max, S_IWUSR | S_IRUGO, | |
393 | show_in_max, set_in_max, 3); | |
394 | static SENSOR_DEVICE_ATTR(in4_max, S_IWUSR | S_IRUGO, | |
395 | show_in_max, set_in_max, 4); | |
396 | static SENSOR_DEVICE_ATTR(in5_max, S_IWUSR | S_IRUGO, | |
397 | show_in_max, set_in_max, 5); | |
398 | static SENSOR_DEVICE_ATTR(in6_max, S_IWUSR | S_IRUGO, | |
399 | show_in_max, set_in_max, 6); | |
400 | static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in_input, NULL, 0); | |
401 | static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in_input, NULL, 1); | |
402 | static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in_input, NULL, 2); | |
403 | static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in_input, NULL, 3); | |
404 | static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in_input, NULL, 4); | |
405 | static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, show_in_input, NULL, 5); | |
406 | static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_in_input, NULL, 6); | |
407 | static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, | |
408 | show_fan_min, set_fan_min, 0); | |
409 | static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, | |
410 | show_fan_min, set_fan_min, 1); | |
411 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0); | |
412 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1); | |
413 | static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO, | |
414 | show_fan_div, set_fan_div, 0); | |
415 | static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO, | |
416 | show_fan_div, set_fan_div, 1); | |
1da177e4 LT |
417 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL); |
418 | static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_hot_max, | |
66b3b1f7 | 419 | set_temp_hot_max); |
1da177e4 | 420 | static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp_hot_hyst, |
66b3b1f7 | 421 | set_temp_hot_hyst); |
1da177e4 | 422 | static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_os_max, |
66b3b1f7 | 423 | set_temp_os_max); |
1da177e4 | 424 | static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_os_hyst, |
66b3b1f7 | 425 | set_temp_os_hyst); |
1da177e4 | 426 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
e84542f5 JD |
427 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); |
428 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
429 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
430 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
431 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 4); | |
432 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 5); | |
433 | static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6); | |
434 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10); | |
435 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11); | |
436 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 8); | |
437 | static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 13); | |
1da177e4 LT |
438 | |
439 | /* | |
440 | * Real code | |
441 | */ | |
442 | ||
0501a381 | 443 | static struct attribute *lm80_attributes[] = { |
f8181762 JD |
444 | &sensor_dev_attr_in0_min.dev_attr.attr, |
445 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
446 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
447 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
448 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
449 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
450 | &sensor_dev_attr_in6_min.dev_attr.attr, | |
451 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
452 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
453 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
454 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
455 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
456 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
457 | &sensor_dev_attr_in6_max.dev_attr.attr, | |
458 | &sensor_dev_attr_in0_input.dev_attr.attr, | |
459 | &sensor_dev_attr_in1_input.dev_attr.attr, | |
460 | &sensor_dev_attr_in2_input.dev_attr.attr, | |
461 | &sensor_dev_attr_in3_input.dev_attr.attr, | |
462 | &sensor_dev_attr_in4_input.dev_attr.attr, | |
463 | &sensor_dev_attr_in5_input.dev_attr.attr, | |
464 | &sensor_dev_attr_in6_input.dev_attr.attr, | |
465 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
466 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
467 | &sensor_dev_attr_fan1_input.dev_attr.attr, | |
468 | &sensor_dev_attr_fan2_input.dev_attr.attr, | |
469 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
470 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
0501a381 MH |
471 | &dev_attr_temp1_input.attr, |
472 | &dev_attr_temp1_max.attr, | |
473 | &dev_attr_temp1_max_hyst.attr, | |
474 | &dev_attr_temp1_crit.attr, | |
475 | &dev_attr_temp1_crit_hyst.attr, | |
476 | &dev_attr_alarms.attr, | |
e84542f5 JD |
477 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
478 | &sensor_dev_attr_in1_alarm.dev_attr.attr, | |
479 | &sensor_dev_attr_in2_alarm.dev_attr.attr, | |
480 | &sensor_dev_attr_in3_alarm.dev_attr.attr, | |
481 | &sensor_dev_attr_in4_alarm.dev_attr.attr, | |
482 | &sensor_dev_attr_in5_alarm.dev_attr.attr, | |
483 | &sensor_dev_attr_in6_alarm.dev_attr.attr, | |
484 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, | |
485 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, | |
486 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
487 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, | |
0501a381 MH |
488 | NULL |
489 | }; | |
490 | ||
491 | static const struct attribute_group lm80_group = { | |
492 | .attrs = lm80_attributes, | |
493 | }; | |
494 | ||
8c8bacc8 | 495 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
310ec792 | 496 | static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info) |
1da177e4 | 497 | { |
8c8bacc8 | 498 | struct i2c_adapter *adapter = client->adapter; |
9908ad4c JD |
499 | int i, cur, man_id, dev_id; |
500 | const char *name = NULL; | |
1da177e4 LT |
501 | |
502 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
8c8bacc8 | 503 | return -ENODEV; |
1da177e4 | 504 | |
9908ad4c JD |
505 | /* First check for unused bits, common to both chip types */ |
506 | if ((lm80_read_value(client, LM80_REG_ALARM2) & 0xc0) | |
507 | || (lm80_read_value(client, LM80_REG_CONFIG) & 0x80)) | |
8c8bacc8 | 508 | return -ENODEV; |
9908ad4c JD |
509 | |
510 | /* | |
511 | * The LM96080 has manufacturer and stepping/die rev registers so we | |
512 | * can just check that. The LM80 does not have such registers so we | |
513 | * have to use a more expensive trick. | |
514 | */ | |
515 | man_id = lm80_read_value(client, LM96080_REG_MAN_ID); | |
516 | dev_id = lm80_read_value(client, LM96080_REG_DEV_ID); | |
517 | if (man_id == 0x01 && dev_id == 0x08) { | |
518 | /* Check more unused bits for confirmation */ | |
519 | if (lm80_read_value(client, LM96080_REG_CONV_RATE) & 0xfe) | |
66b3b1f7 | 520 | return -ENODEV; |
9908ad4c JD |
521 | |
522 | name = "lm96080"; | |
523 | } else { | |
524 | /* Check 6-bit addressing */ | |
525 | for (i = 0x2a; i <= 0x3d; i++) { | |
526 | cur = i2c_smbus_read_byte_data(client, i); | |
527 | if ((i2c_smbus_read_byte_data(client, i + 0x40) != cur) | |
528 | || (i2c_smbus_read_byte_data(client, i + 0x80) != cur) | |
529 | || (i2c_smbus_read_byte_data(client, i + 0xc0) != cur)) | |
530 | return -ENODEV; | |
531 | } | |
532 | ||
533 | name = "lm80"; | |
1da177e4 LT |
534 | } |
535 | ||
9908ad4c | 536 | strlcpy(info->type, name, I2C_NAME_SIZE); |
1da177e4 | 537 | |
8c8bacc8 JD |
538 | return 0; |
539 | } | |
1da177e4 | 540 | |
8c8bacc8 JD |
541 | static int lm80_probe(struct i2c_client *client, |
542 | const struct i2c_device_id *id) | |
543 | { | |
544 | struct lm80_data *data; | |
545 | int err; | |
546 | ||
c38b2820 GR |
547 | data = devm_kzalloc(&client->dev, sizeof(struct lm80_data), GFP_KERNEL); |
548 | if (!data) | |
549 | return -ENOMEM; | |
8c8bacc8 JD |
550 | |
551 | i2c_set_clientdata(client, data); | |
552 | mutex_init(&data->update_lock); | |
1da177e4 LT |
553 | |
554 | /* Initialize the LM80 chip */ | |
6cc37ee5 | 555 | lm80_init_client(client); |
1da177e4 LT |
556 | |
557 | /* A few vars need to be filled upon startup */ | |
6cc37ee5 JD |
558 | data->fan_min[0] = lm80_read_value(client, LM80_REG_FAN_MIN(1)); |
559 | data->fan_min[1] = lm80_read_value(client, LM80_REG_FAN_MIN(2)); | |
1da177e4 LT |
560 | |
561 | /* Register sysfs hooks */ | |
66b3b1f7 FM |
562 | err = sysfs_create_group(&client->dev.kobj, &lm80_group); |
563 | if (err) | |
c38b2820 | 564 | return err; |
0501a381 | 565 | |
6cc37ee5 | 566 | data->hwmon_dev = hwmon_device_register(&client->dev); |
1beeffe4 TJ |
567 | if (IS_ERR(data->hwmon_dev)) { |
568 | err = PTR_ERR(data->hwmon_dev); | |
0501a381 | 569 | goto error_remove; |
943b0830 MH |
570 | } |
571 | ||
1da177e4 LT |
572 | return 0; |
573 | ||
0501a381 | 574 | error_remove: |
6cc37ee5 | 575 | sysfs_remove_group(&client->dev.kobj, &lm80_group); |
1da177e4 LT |
576 | return err; |
577 | } | |
578 | ||
8c8bacc8 | 579 | static int lm80_remove(struct i2c_client *client) |
1da177e4 | 580 | { |
943b0830 | 581 | struct lm80_data *data = i2c_get_clientdata(client); |
1da177e4 | 582 | |
1beeffe4 | 583 | hwmon_device_unregister(data->hwmon_dev); |
0501a381 | 584 | sysfs_remove_group(&client->dev.kobj, &lm80_group); |
1da177e4 | 585 | |
1da177e4 LT |
586 | return 0; |
587 | } | |
588 | ||
589 | static int lm80_read_value(struct i2c_client *client, u8 reg) | |
590 | { | |
591 | return i2c_smbus_read_byte_data(client, reg); | |
592 | } | |
593 | ||
594 | static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value) | |
595 | { | |
596 | return i2c_smbus_write_byte_data(client, reg, value); | |
597 | } | |
598 | ||
599 | /* Called when we have found a new LM80. */ | |
600 | static void lm80_init_client(struct i2c_client *client) | |
601 | { | |
1160631b GR |
602 | /* |
603 | * Reset all except Watchdog values and last conversion values | |
604 | * This sets fan-divs to 2, among others. This makes most other | |
605 | * initializations unnecessary | |
606 | */ | |
1da177e4 LT |
607 | lm80_write_value(client, LM80_REG_CONFIG, 0x80); |
608 | /* Set 11-bit temperature resolution */ | |
609 | lm80_write_value(client, LM80_REG_RES, 0x08); | |
610 | ||
611 | /* Start monitoring */ | |
612 | lm80_write_value(client, LM80_REG_CONFIG, 0x01); | |
613 | } | |
614 | ||
615 | static struct lm80_data *lm80_update_device(struct device *dev) | |
616 | { | |
617 | struct i2c_client *client = to_i2c_client(dev); | |
618 | struct lm80_data *data = i2c_get_clientdata(client); | |
619 | int i; | |
2faaa931 FM |
620 | int rv; |
621 | int prev_rv; | |
622 | struct lm80_data *ret = data; | |
1da177e4 | 623 | |
9a61bf63 | 624 | mutex_lock(&data->update_lock); |
1da177e4 | 625 | |
96585f1a FM |
626 | if (data->error) |
627 | lm80_init_client(client); | |
628 | ||
1da177e4 LT |
629 | if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { |
630 | dev_dbg(&client->dev, "Starting lm80 update\n"); | |
631 | for (i = 0; i <= 6; i++) { | |
2faaa931 FM |
632 | rv = lm80_read_value(client, LM80_REG_IN(i)); |
633 | if (rv < 0) | |
634 | goto abort; | |
635 | data->in[i] = rv; | |
636 | ||
637 | rv = lm80_read_value(client, LM80_REG_IN_MIN(i)); | |
638 | if (rv < 0) | |
639 | goto abort; | |
640 | data->in_min[i] = rv; | |
641 | ||
642 | rv = lm80_read_value(client, LM80_REG_IN_MAX(i)); | |
643 | if (rv < 0) | |
644 | goto abort; | |
645 | data->in_max[i] = rv; | |
1da177e4 | 646 | } |
2faaa931 FM |
647 | |
648 | rv = lm80_read_value(client, LM80_REG_FAN1); | |
649 | if (rv < 0) | |
650 | goto abort; | |
651 | data->fan[0] = rv; | |
652 | ||
653 | rv = lm80_read_value(client, LM80_REG_FAN_MIN(1)); | |
654 | if (rv < 0) | |
655 | goto abort; | |
656 | data->fan_min[0] = rv; | |
657 | ||
658 | rv = lm80_read_value(client, LM80_REG_FAN2); | |
659 | if (rv < 0) | |
660 | goto abort; | |
661 | data->fan[1] = rv; | |
662 | ||
663 | rv = lm80_read_value(client, LM80_REG_FAN_MIN(2)); | |
664 | if (rv < 0) | |
665 | goto abort; | |
666 | data->fan_min[1] = rv; | |
667 | ||
668 | prev_rv = rv = lm80_read_value(client, LM80_REG_TEMP); | |
669 | if (rv < 0) | |
670 | goto abort; | |
671 | rv = lm80_read_value(client, LM80_REG_RES); | |
672 | if (rv < 0) | |
673 | goto abort; | |
674 | data->temp = (prev_rv << 8) | (rv & 0xf0); | |
675 | ||
676 | rv = lm80_read_value(client, LM80_REG_TEMP_OS_MAX); | |
677 | if (rv < 0) | |
678 | goto abort; | |
679 | data->temp_os_max = rv; | |
680 | ||
681 | rv = lm80_read_value(client, LM80_REG_TEMP_OS_HYST); | |
682 | if (rv < 0) | |
683 | goto abort; | |
684 | data->temp_os_hyst = rv; | |
685 | ||
686 | rv = lm80_read_value(client, LM80_REG_TEMP_HOT_MAX); | |
687 | if (rv < 0) | |
688 | goto abort; | |
689 | data->temp_hot_max = rv; | |
690 | ||
691 | rv = lm80_read_value(client, LM80_REG_TEMP_HOT_HYST); | |
692 | if (rv < 0) | |
693 | goto abort; | |
694 | data->temp_hot_hyst = rv; | |
695 | ||
696 | rv = lm80_read_value(client, LM80_REG_FANDIV); | |
697 | if (rv < 0) | |
698 | goto abort; | |
699 | data->fan_div[0] = (rv >> 2) & 0x03; | |
700 | data->fan_div[1] = (rv >> 4) & 0x03; | |
701 | ||
702 | prev_rv = rv = lm80_read_value(client, LM80_REG_ALARM1); | |
703 | if (rv < 0) | |
704 | goto abort; | |
705 | rv = lm80_read_value(client, LM80_REG_ALARM2); | |
706 | if (rv < 0) | |
707 | goto abort; | |
708 | data->alarms = prev_rv + (rv << 8); | |
709 | ||
1da177e4 LT |
710 | data->last_updated = jiffies; |
711 | data->valid = 1; | |
96585f1a | 712 | data->error = 0; |
1da177e4 | 713 | } |
2faaa931 FM |
714 | goto done; |
715 | ||
716 | abort: | |
717 | ret = ERR_PTR(rv); | |
718 | data->valid = 0; | |
96585f1a | 719 | data->error = 1; |
1da177e4 | 720 | |
2faaa931 | 721 | done: |
9a61bf63 | 722 | mutex_unlock(&data->update_lock); |
1da177e4 | 723 | |
2faaa931 | 724 | return ret; |
1da177e4 LT |
725 | } |
726 | ||
f0967eea | 727 | module_i2c_driver(lm80_driver); |
1da177e4 LT |
728 | |
729 | MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and " | |
730 | "Philip Edelbrock <phil@netroedge.com>"); | |
731 | MODULE_DESCRIPTION("LM80 driver"); | |
732 | MODULE_LICENSE("GPL"); |