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40b5cda2 GC |
1 | /* |
2 | * adm9240.c Part of lm_sensors, Linux kernel modules for hardware | |
c387e4eb | 3 | * monitoring |
40b5cda2 GC |
4 | * |
5 | * Copyright (C) 1999 Frodo Looijaard <frodol@dds.nl> | |
6 | * Philip Edelbrock <phil@netroedge.com> | |
7 | * Copyright (C) 2003 Michiel Rook <michiel@grendelproject.nl> | |
2ca7b961 | 8 | * Copyright (C) 2005 Grant Coady <gcoady.lk@gmail.com> with valuable |
c387e4eb | 9 | * guidance from Jean Delvare |
40b5cda2 GC |
10 | * |
11 | * Driver supports Analog Devices ADM9240 | |
12 | * Dallas Semiconductor DS1780 | |
13 | * National Semiconductor LM81 | |
14 | * | |
15 | * ADM9240 is the reference, DS1780 and LM81 are register compatibles | |
16 | * | |
17 | * Voltage Six inputs are scaled by chip, VID also reported | |
18 | * Temperature Chip temperature to 0.5'C, maximum and max_hysteris | |
19 | * Fans 2 fans, low speed alarm, automatic fan clock divider | |
20 | * Alarms 16-bit map of active alarms | |
21 | * Analog Out 0..1250 mV output | |
22 | * | |
0de2b244 | 23 | * Chassis Intrusion: clear CI latch with 'echo 0 > intrusion0_alarm' |
40b5cda2 GC |
24 | * |
25 | * Test hardware: Intel SE440BX-2 desktop motherboard --Grant | |
26 | * | |
27 | * LM81 extended temp reading not implemented | |
28 | * | |
29 | * This program is free software; you can redistribute it and/or modify | |
30 | * it under the terms of the GNU General Public License as published by | |
31 | * the Free Software Foundation; either version 2 of the License, or | |
32 | * (at your option) any later version. | |
33 | * | |
34 | * This program is distributed in the hope that it will be useful, | |
35 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
36 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
37 | * GNU General Public License for more details. | |
38 | * | |
39 | * You should have received a copy of the GNU General Public License | |
40 | * along with this program; if not, write to the Free Software | |
41 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
42 | */ | |
43 | ||
44 | #include <linux/init.h> | |
45 | #include <linux/module.h> | |
46 | #include <linux/slab.h> | |
47 | #include <linux/i2c.h> | |
c7461a66 | 48 | #include <linux/hwmon-sysfs.h> |
943b0830 | 49 | #include <linux/hwmon.h> |
303760b4 | 50 | #include <linux/hwmon-vid.h> |
943b0830 | 51 | #include <linux/err.h> |
9a61bf63 | 52 | #include <linux/mutex.h> |
dcd8f392 | 53 | #include <linux/jiffies.h> |
40b5cda2 GC |
54 | |
55 | /* Addresses to scan */ | |
25e9c86d | 56 | static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, |
40b5cda2 GC |
57 | I2C_CLIENT_END }; |
58 | ||
e5e9f44c | 59 | enum chips { adm9240, ds1780, lm81 }; |
40b5cda2 GC |
60 | |
61 | /* ADM9240 registers */ | |
62 | #define ADM9240_REG_MAN_ID 0x3e | |
63 | #define ADM9240_REG_DIE_REV 0x3f | |
64 | #define ADM9240_REG_CONFIG 0x40 | |
65 | ||
66 | #define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */ | |
67 | #define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2) | |
68 | #define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2) | |
69 | #define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */ | |
70 | #define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr)) | |
71 | #define ADM9240_REG_INT(nr) (0x41 + (nr)) | |
72 | #define ADM9240_REG_INT_MASK(nr) (0x43 + (nr)) | |
73 | #define ADM9240_REG_TEMP 0x27 | |
c7461a66 | 74 | #define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */ |
40b5cda2 GC |
75 | #define ADM9240_REG_ANALOG_OUT 0x19 |
76 | #define ADM9240_REG_CHASSIS_CLEAR 0x46 | |
77 | #define ADM9240_REG_VID_FAN_DIV 0x47 | |
78 | #define ADM9240_REG_I2C_ADDR 0x48 | |
79 | #define ADM9240_REG_VID4 0x49 | |
80 | #define ADM9240_REG_TEMP_CONF 0x4b | |
81 | ||
82 | /* generalised scaling with integer rounding */ | |
83 | static inline int SCALE(long val, int mul, int div) | |
84 | { | |
85 | if (val < 0) | |
86 | return (val * mul - div / 2) / div; | |
87 | else | |
88 | return (val * mul + div / 2) / div; | |
89 | } | |
90 | ||
91 | /* adm9240 internally scales voltage measurements */ | |
92 | static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 }; | |
93 | ||
94 | static inline unsigned int IN_FROM_REG(u8 reg, int n) | |
95 | { | |
96 | return SCALE(reg, nom_mv[n], 192); | |
97 | } | |
98 | ||
99 | static inline u8 IN_TO_REG(unsigned long val, int n) | |
100 | { | |
0fb620c4 GR |
101 | val = clamp_val(val, 0, nom_mv[n] * 255 / 192); |
102 | return SCALE(val, 192, nom_mv[n]); | |
40b5cda2 GC |
103 | } |
104 | ||
105 | /* temperature range: -40..125, 127 disables temperature alarm */ | |
106 | static inline s8 TEMP_TO_REG(long val) | |
107 | { | |
0fb620c4 GR |
108 | val = clamp_val(val, -40000, 127000); |
109 | return SCALE(val, 1, 1000); | |
40b5cda2 GC |
110 | } |
111 | ||
112 | /* two fans, each with low fan speed limit */ | |
113 | static inline unsigned int FAN_FROM_REG(u8 reg, u8 div) | |
114 | { | |
115 | if (!reg) /* error */ | |
116 | return -1; | |
117 | ||
118 | if (reg == 255) | |
119 | return 0; | |
120 | ||
121 | return SCALE(1350000, 1, reg * div); | |
122 | } | |
123 | ||
124 | /* analog out 0..1250mV */ | |
125 | static inline u8 AOUT_TO_REG(unsigned long val) | |
126 | { | |
0fb620c4 GR |
127 | val = clamp_val(val, 0, 1250); |
128 | return SCALE(val, 255, 1250); | |
40b5cda2 GC |
129 | } |
130 | ||
131 | static inline unsigned int AOUT_FROM_REG(u8 reg) | |
132 | { | |
133 | return SCALE(reg, 1250, 255); | |
134 | } | |
135 | ||
40b5cda2 GC |
136 | /* per client data */ |
137 | struct adm9240_data { | |
715f69be | 138 | struct i2c_client *client; |
9a61bf63 | 139 | struct mutex update_lock; |
40b5cda2 GC |
140 | char valid; |
141 | unsigned long last_updated_measure; | |
142 | unsigned long last_updated_config; | |
143 | ||
144 | u8 in[6]; /* ro in0_input */ | |
145 | u8 in_max[6]; /* rw in0_max */ | |
146 | u8 in_min[6]; /* rw in0_min */ | |
147 | u8 fan[2]; /* ro fan1_input */ | |
148 | u8 fan_min[2]; /* rw fan1_min */ | |
149 | u8 fan_div[2]; /* rw fan1_div, read-only accessor */ | |
150 | s16 temp; /* ro temp1_input, 9-bit sign-extended */ | |
c7461a66 | 151 | s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */ |
40b5cda2 | 152 | u16 alarms; /* ro alarms */ |
8e8f9289 | 153 | u8 aout; /* rw aout_output */ |
40b5cda2 GC |
154 | u8 vid; /* ro vid */ |
155 | u8 vrm; /* -- vrm set on startup, no accessor */ | |
156 | }; | |
157 | ||
4341fc3f AL |
158 | /* write new fan div, callers must hold data->update_lock */ |
159 | static void adm9240_write_fan_div(struct i2c_client *client, int nr, | |
160 | u8 fan_div) | |
161 | { | |
162 | u8 reg, old, shift = (nr + 2) * 2; | |
163 | ||
164 | reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); | |
165 | old = (reg >> shift) & 3; | |
166 | reg &= ~(3 << shift); | |
167 | reg |= (fan_div << shift); | |
168 | i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg); | |
169 | dev_dbg(&client->dev, | |
170 | "fan%d clock divider changed from %u to %u\n", | |
171 | nr + 1, 1 << old, 1 << fan_div); | |
172 | } | |
173 | ||
174 | static struct adm9240_data *adm9240_update_device(struct device *dev) | |
175 | { | |
715f69be AL |
176 | struct adm9240_data *data = dev_get_drvdata(dev); |
177 | struct i2c_client *client = data->client; | |
4341fc3f AL |
178 | int i; |
179 | ||
180 | mutex_lock(&data->update_lock); | |
181 | ||
182 | /* minimum measurement cycle: 1.75 seconds */ | |
183 | if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4)) | |
184 | || !data->valid) { | |
185 | ||
186 | for (i = 0; i < 6; i++) { /* read voltages */ | |
187 | data->in[i] = i2c_smbus_read_byte_data(client, | |
188 | ADM9240_REG_IN(i)); | |
189 | } | |
190 | data->alarms = i2c_smbus_read_byte_data(client, | |
191 | ADM9240_REG_INT(0)) | | |
192 | i2c_smbus_read_byte_data(client, | |
193 | ADM9240_REG_INT(1)) << 8; | |
194 | ||
195 | /* | |
196 | * read temperature: assume temperature changes less than | |
197 | * 0.5'C per two measurement cycles thus ignore possible | |
198 | * but unlikely aliasing error on lsb reading. --Grant | |
199 | */ | |
667f4bab | 200 | data->temp = (i2c_smbus_read_byte_data(client, |
4341fc3f AL |
201 | ADM9240_REG_TEMP) << 8) | |
202 | i2c_smbus_read_byte_data(client, | |
667f4bab | 203 | ADM9240_REG_TEMP_CONF); |
4341fc3f AL |
204 | |
205 | for (i = 0; i < 2; i++) { /* read fans */ | |
206 | data->fan[i] = i2c_smbus_read_byte_data(client, | |
207 | ADM9240_REG_FAN(i)); | |
208 | ||
209 | /* adjust fan clock divider on overflow */ | |
210 | if (data->valid && data->fan[i] == 255 && | |
211 | data->fan_div[i] < 3) { | |
212 | ||
213 | adm9240_write_fan_div(client, i, | |
214 | ++data->fan_div[i]); | |
215 | ||
216 | /* adjust fan_min if active, but not to 0 */ | |
217 | if (data->fan_min[i] < 255 && | |
218 | data->fan_min[i] >= 2) | |
219 | data->fan_min[i] /= 2; | |
220 | } | |
221 | } | |
222 | data->last_updated_measure = jiffies; | |
223 | } | |
224 | ||
225 | /* minimum config reading cycle: 300 seconds */ | |
226 | if (time_after(jiffies, data->last_updated_config + (HZ * 300)) | |
227 | || !data->valid) { | |
228 | ||
229 | for (i = 0; i < 6; i++) { | |
230 | data->in_min[i] = i2c_smbus_read_byte_data(client, | |
231 | ADM9240_REG_IN_MIN(i)); | |
232 | data->in_max[i] = i2c_smbus_read_byte_data(client, | |
233 | ADM9240_REG_IN_MAX(i)); | |
234 | } | |
235 | for (i = 0; i < 2; i++) { | |
236 | data->fan_min[i] = i2c_smbus_read_byte_data(client, | |
237 | ADM9240_REG_FAN_MIN(i)); | |
238 | } | |
239 | data->temp_max[0] = i2c_smbus_read_byte_data(client, | |
240 | ADM9240_REG_TEMP_MAX(0)); | |
241 | data->temp_max[1] = i2c_smbus_read_byte_data(client, | |
242 | ADM9240_REG_TEMP_MAX(1)); | |
243 | ||
244 | /* read fan divs and 5-bit VID */ | |
245 | i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); | |
246 | data->fan_div[0] = (i >> 4) & 3; | |
247 | data->fan_div[1] = (i >> 6) & 3; | |
248 | data->vid = i & 0x0f; | |
249 | data->vid |= (i2c_smbus_read_byte_data(client, | |
250 | ADM9240_REG_VID4) & 1) << 4; | |
251 | /* read analog out */ | |
252 | data->aout = i2c_smbus_read_byte_data(client, | |
253 | ADM9240_REG_ANALOG_OUT); | |
254 | ||
255 | data->last_updated_config = jiffies; | |
256 | data->valid = 1; | |
257 | } | |
258 | mutex_unlock(&data->update_lock); | |
259 | return data; | |
260 | } | |
261 | ||
40b5cda2 GC |
262 | /*** sysfs accessors ***/ |
263 | ||
264 | /* temperature */ | |
c7461a66 GC |
265 | static ssize_t show_temp(struct device *dev, struct device_attribute *dummy, |
266 | char *buf) | |
267 | { | |
268 | struct adm9240_data *data = adm9240_update_device(dev); | |
667f4bab | 269 | return sprintf(buf, "%d\n", data->temp / 128 * 500); /* 9-bit value */ |
c7461a66 GC |
270 | } |
271 | ||
272 | static ssize_t show_max(struct device *dev, struct device_attribute *devattr, | |
273 | char *buf) | |
274 | { | |
275 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
276 | struct adm9240_data *data = adm9240_update_device(dev); | |
277 | return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000); | |
278 | } | |
279 | ||
280 | static ssize_t set_max(struct device *dev, struct device_attribute *devattr, | |
281 | const char *buf, size_t count) | |
282 | { | |
283 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
715f69be AL |
284 | struct adm9240_data *data = dev_get_drvdata(dev); |
285 | struct i2c_client *client = data->client; | |
c387e4eb GR |
286 | long val; |
287 | int err; | |
288 | ||
289 | err = kstrtol(buf, 10, &val); | |
290 | if (err) | |
291 | return err; | |
c7461a66 | 292 | |
9a61bf63 | 293 | mutex_lock(&data->update_lock); |
c7461a66 GC |
294 | data->temp_max[attr->index] = TEMP_TO_REG(val); |
295 | i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(attr->index), | |
296 | data->temp_max[attr->index]); | |
9a61bf63 | 297 | mutex_unlock(&data->update_lock); |
c7461a66 GC |
298 | return count; |
299 | } | |
300 | ||
40b5cda2 | 301 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); |
c7461a66 GC |
302 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, |
303 | show_max, set_max, 0); | |
304 | static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, | |
305 | show_max, set_max, 1); | |
40b5cda2 GC |
306 | |
307 | /* voltage */ | |
c7461a66 GC |
308 | static ssize_t show_in(struct device *dev, struct device_attribute *devattr, |
309 | char *buf) | |
40b5cda2 | 310 | { |
c7461a66 | 311 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 312 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
313 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index], |
314 | attr->index)); | |
40b5cda2 GC |
315 | } |
316 | ||
e415e48b JD |
317 | static ssize_t show_in_min(struct device *dev, |
318 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 319 | { |
c7461a66 | 320 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 321 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
322 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index], |
323 | attr->index)); | |
40b5cda2 GC |
324 | } |
325 | ||
e415e48b JD |
326 | static ssize_t show_in_max(struct device *dev, |
327 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 328 | { |
c7461a66 | 329 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 330 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
331 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index], |
332 | attr->index)); | |
40b5cda2 GC |
333 | } |
334 | ||
e415e48b JD |
335 | static ssize_t set_in_min(struct device *dev, |
336 | struct device_attribute *devattr, | |
c7461a66 | 337 | const char *buf, size_t count) |
40b5cda2 | 338 | { |
c7461a66 | 339 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
715f69be AL |
340 | struct adm9240_data *data = dev_get_drvdata(dev); |
341 | struct i2c_client *client = data->client; | |
c387e4eb GR |
342 | unsigned long val; |
343 | int err; | |
344 | ||
345 | err = kstrtoul(buf, 10, &val); | |
346 | if (err) | |
347 | return err; | |
40b5cda2 | 348 | |
9a61bf63 | 349 | mutex_lock(&data->update_lock); |
c7461a66 GC |
350 | data->in_min[attr->index] = IN_TO_REG(val, attr->index); |
351 | i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(attr->index), | |
352 | data->in_min[attr->index]); | |
9a61bf63 | 353 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
354 | return count; |
355 | } | |
356 | ||
e415e48b JD |
357 | static ssize_t set_in_max(struct device *dev, |
358 | struct device_attribute *devattr, | |
c7461a66 | 359 | const char *buf, size_t count) |
40b5cda2 | 360 | { |
c7461a66 | 361 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
715f69be AL |
362 | struct adm9240_data *data = dev_get_drvdata(dev); |
363 | struct i2c_client *client = data->client; | |
c387e4eb GR |
364 | unsigned long val; |
365 | int err; | |
366 | ||
367 | err = kstrtoul(buf, 10, &val); | |
368 | if (err) | |
369 | return err; | |
40b5cda2 | 370 | |
9a61bf63 | 371 | mutex_lock(&data->update_lock); |
c7461a66 GC |
372 | data->in_max[attr->index] = IN_TO_REG(val, attr->index); |
373 | i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(attr->index), | |
374 | data->in_max[attr->index]); | |
9a61bf63 | 375 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
376 | return count; |
377 | } | |
378 | ||
c7461a66 | 379 | #define vin(nr) \ |
c387e4eb | 380 | static SENSOR_DEVICE_ATTR(in##nr##_input, S_IRUGO, \ |
c7461a66 GC |
381 | show_in, NULL, nr); \ |
382 | static SENSOR_DEVICE_ATTR(in##nr##_min, S_IRUGO | S_IWUSR, \ | |
383 | show_in_min, set_in_min, nr); \ | |
384 | static SENSOR_DEVICE_ATTR(in##nr##_max, S_IRUGO | S_IWUSR, \ | |
385 | show_in_max, set_in_max, nr); | |
386 | ||
387 | vin(0); | |
388 | vin(1); | |
389 | vin(2); | |
390 | vin(3); | |
391 | vin(4); | |
392 | vin(5); | |
40b5cda2 GC |
393 | |
394 | /* fans */ | |
c7461a66 GC |
395 | static ssize_t show_fan(struct device *dev, |
396 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 397 | { |
c7461a66 | 398 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 399 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
400 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index], |
401 | 1 << data->fan_div[attr->index])); | |
40b5cda2 GC |
402 | } |
403 | ||
c7461a66 GC |
404 | static ssize_t show_fan_min(struct device *dev, |
405 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 406 | { |
c7461a66 | 407 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 408 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
409 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index], |
410 | 1 << data->fan_div[attr->index])); | |
40b5cda2 GC |
411 | } |
412 | ||
c7461a66 GC |
413 | static ssize_t show_fan_div(struct device *dev, |
414 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 415 | { |
c7461a66 | 416 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 417 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 | 418 | return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]); |
40b5cda2 GC |
419 | } |
420 | ||
e415e48b | 421 | /* |
40b5cda2 GC |
422 | * set fan speed low limit: |
423 | * | |
424 | * - value is zero: disable fan speed low limit alarm | |
425 | * | |
426 | * - value is below fan speed measurement range: enable fan speed low | |
427 | * limit alarm to be asserted while fan speed too slow to measure | |
428 | * | |
429 | * - otherwise: select fan clock divider to suit fan speed low limit, | |
430 | * measurement code may adjust registers to ensure fan speed reading | |
431 | */ | |
c7461a66 GC |
432 | static ssize_t set_fan_min(struct device *dev, |
433 | struct device_attribute *devattr, | |
434 | const char *buf, size_t count) | |
40b5cda2 | 435 | { |
c7461a66 | 436 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
715f69be AL |
437 | struct adm9240_data *data = dev_get_drvdata(dev); |
438 | struct i2c_client *client = data->client; | |
c7461a66 | 439 | int nr = attr->index; |
40b5cda2 | 440 | u8 new_div; |
c387e4eb GR |
441 | unsigned long val; |
442 | int err; | |
443 | ||
444 | err = kstrtoul(buf, 10, &val); | |
445 | if (err) | |
446 | return err; | |
40b5cda2 | 447 | |
9a61bf63 | 448 | mutex_lock(&data->update_lock); |
40b5cda2 GC |
449 | |
450 | if (!val) { | |
451 | data->fan_min[nr] = 255; | |
452 | new_div = data->fan_div[nr]; | |
453 | ||
454 | dev_dbg(&client->dev, "fan%u low limit set disabled\n", | |
455 | nr + 1); | |
456 | ||
457 | } else if (val < 1350000 / (8 * 254)) { | |
458 | new_div = 3; | |
459 | data->fan_min[nr] = 254; | |
460 | ||
461 | dev_dbg(&client->dev, "fan%u low limit set minimum %u\n", | |
462 | nr + 1, FAN_FROM_REG(254, 1 << new_div)); | |
463 | ||
464 | } else { | |
465 | unsigned int new_min = 1350000 / val; | |
466 | ||
467 | new_div = 0; | |
468 | while (new_min > 192 && new_div < 3) { | |
469 | new_div++; | |
470 | new_min /= 2; | |
471 | } | |
472 | if (!new_min) /* keep > 0 */ | |
473 | new_min++; | |
474 | ||
475 | data->fan_min[nr] = new_min; | |
476 | ||
477 | dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n", | |
478 | nr + 1, FAN_FROM_REG(new_min, 1 << new_div)); | |
479 | } | |
480 | ||
481 | if (new_div != data->fan_div[nr]) { | |
482 | data->fan_div[nr] = new_div; | |
483 | adm9240_write_fan_div(client, nr, new_div); | |
484 | } | |
205cf13e | 485 | i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr), |
40b5cda2 GC |
486 | data->fan_min[nr]); |
487 | ||
9a61bf63 | 488 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
489 | return count; |
490 | } | |
491 | ||
c7461a66 GC |
492 | #define fan(nr) \ |
493 | static SENSOR_DEVICE_ATTR(fan##nr##_input, S_IRUGO, \ | |
494 | show_fan, NULL, nr - 1); \ | |
495 | static SENSOR_DEVICE_ATTR(fan##nr##_div, S_IRUGO, \ | |
496 | show_fan_div, NULL, nr - 1); \ | |
497 | static SENSOR_DEVICE_ATTR(fan##nr##_min, S_IRUGO | S_IWUSR, \ | |
498 | show_fan_min, set_fan_min, nr - 1); | |
499 | ||
500 | fan(1); | |
501 | fan(2); | |
40b5cda2 GC |
502 | |
503 | /* alarms */ | |
e415e48b JD |
504 | static ssize_t show_alarms(struct device *dev, |
505 | struct device_attribute *attr, char *buf) | |
40b5cda2 GC |
506 | { |
507 | struct adm9240_data *data = adm9240_update_device(dev); | |
508 | return sprintf(buf, "%u\n", data->alarms); | |
509 | } | |
510 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
511 | ||
360f9452 JD |
512 | static ssize_t show_alarm(struct device *dev, |
513 | struct device_attribute *attr, char *buf) | |
514 | { | |
515 | int bitnr = to_sensor_dev_attr(attr)->index; | |
516 | struct adm9240_data *data = adm9240_update_device(dev); | |
517 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); | |
518 | } | |
519 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); | |
520 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
521 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
522 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
523 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); | |
524 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); | |
525 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4); | |
526 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); | |
527 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); | |
528 | ||
40b5cda2 | 529 | /* vid */ |
e415e48b JD |
530 | static ssize_t show_vid(struct device *dev, |
531 | struct device_attribute *attr, char *buf) | |
40b5cda2 GC |
532 | { |
533 | struct adm9240_data *data = adm9240_update_device(dev); | |
534 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); | |
535 | } | |
536 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); | |
537 | ||
538 | /* analog output */ | |
e415e48b JD |
539 | static ssize_t show_aout(struct device *dev, |
540 | struct device_attribute *attr, char *buf) | |
40b5cda2 GC |
541 | { |
542 | struct adm9240_data *data = adm9240_update_device(dev); | |
543 | return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); | |
544 | } | |
545 | ||
e415e48b JD |
546 | static ssize_t set_aout(struct device *dev, |
547 | struct device_attribute *attr, | |
548 | const char *buf, size_t count) | |
40b5cda2 | 549 | { |
715f69be AL |
550 | struct adm9240_data *data = dev_get_drvdata(dev); |
551 | struct i2c_client *client = data->client; | |
c387e4eb GR |
552 | long val; |
553 | int err; | |
554 | ||
555 | err = kstrtol(buf, 10, &val); | |
556 | if (err) | |
557 | return err; | |
40b5cda2 | 558 | |
9a61bf63 | 559 | mutex_lock(&data->update_lock); |
40b5cda2 | 560 | data->aout = AOUT_TO_REG(val); |
205cf13e | 561 | i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout); |
9a61bf63 | 562 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
563 | return count; |
564 | } | |
565 | static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout); | |
566 | ||
0de2b244 JD |
567 | static ssize_t chassis_clear(struct device *dev, |
568 | struct device_attribute *attr, | |
569 | const char *buf, size_t count) | |
570 | { | |
715f69be AL |
571 | struct adm9240_data *data = dev_get_drvdata(dev); |
572 | struct i2c_client *client = data->client; | |
0de2b244 JD |
573 | unsigned long val; |
574 | ||
179c4fdb | 575 | if (kstrtoul(buf, 10, &val) || val != 0) |
0de2b244 JD |
576 | return -EINVAL; |
577 | ||
578 | mutex_lock(&data->update_lock); | |
579 | i2c_smbus_write_byte_data(client, ADM9240_REG_CHASSIS_CLEAR, 0x80); | |
580 | data->valid = 0; /* Force cache refresh */ | |
581 | mutex_unlock(&data->update_lock); | |
582 | dev_dbg(&client->dev, "chassis intrusion latch cleared\n"); | |
583 | ||
584 | return count; | |
585 | } | |
586 | static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR, show_alarm, | |
587 | chassis_clear, 12); | |
40b5cda2 | 588 | |
715f69be | 589 | static struct attribute *adm9240_attrs[] = { |
681c6f7a MH |
590 | &sensor_dev_attr_in0_input.dev_attr.attr, |
591 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
592 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
360f9452 | 593 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
681c6f7a MH |
594 | &sensor_dev_attr_in1_input.dev_attr.attr, |
595 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
596 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
360f9452 | 597 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
681c6f7a MH |
598 | &sensor_dev_attr_in2_input.dev_attr.attr, |
599 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
600 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
360f9452 | 601 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
681c6f7a MH |
602 | &sensor_dev_attr_in3_input.dev_attr.attr, |
603 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
604 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
360f9452 | 605 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
681c6f7a MH |
606 | &sensor_dev_attr_in4_input.dev_attr.attr, |
607 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
608 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
360f9452 | 609 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
681c6f7a MH |
610 | &sensor_dev_attr_in5_input.dev_attr.attr, |
611 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
612 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
360f9452 | 613 | &sensor_dev_attr_in5_alarm.dev_attr.attr, |
681c6f7a MH |
614 | &dev_attr_temp1_input.attr, |
615 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
616 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, | |
360f9452 | 617 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
681c6f7a MH |
618 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
619 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
620 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
360f9452 | 621 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
681c6f7a MH |
622 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
623 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
624 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
360f9452 | 625 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
681c6f7a MH |
626 | &dev_attr_alarms.attr, |
627 | &dev_attr_aout_output.attr, | |
0de2b244 | 628 | &sensor_dev_attr_intrusion0_alarm.dev_attr.attr, |
681c6f7a MH |
629 | &dev_attr_cpu0_vid.attr, |
630 | NULL | |
631 | }; | |
632 | ||
715f69be | 633 | ATTRIBUTE_GROUPS(adm9240); |
681c6f7a | 634 | |
40b5cda2 GC |
635 | |
636 | /*** sensor chip detect and driver install ***/ | |
637 | ||
7fae8283 | 638 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
310ec792 | 639 | static int adm9240_detect(struct i2c_client *new_client, |
7fae8283 | 640 | struct i2c_board_info *info) |
40b5cda2 | 641 | { |
7fae8283 | 642 | struct i2c_adapter *adapter = new_client->adapter; |
40b5cda2 | 643 | const char *name = ""; |
7fae8283 | 644 | int address = new_client->addr; |
40b5cda2 GC |
645 | u8 man_id, die_rev; |
646 | ||
647 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
7fae8283 | 648 | return -ENODEV; |
40b5cda2 | 649 | |
52df6440 JD |
650 | /* verify chip: reg address should match i2c address */ |
651 | if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR) | |
652 | != address) { | |
653 | dev_err(&adapter->dev, "detect fail: address match, 0x%02x\n", | |
654 | address); | |
655 | return -ENODEV; | |
40b5cda2 GC |
656 | } |
657 | ||
52df6440 JD |
658 | /* check known chip manufacturer */ |
659 | man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID); | |
660 | if (man_id == 0x23) { | |
40b5cda2 | 661 | name = "adm9240"; |
52df6440 | 662 | } else if (man_id == 0xda) { |
40b5cda2 | 663 | name = "ds1780"; |
52df6440 | 664 | } else if (man_id == 0x01) { |
40b5cda2 | 665 | name = "lm81"; |
52df6440 JD |
666 | } else { |
667 | dev_err(&adapter->dev, "detect fail: unknown manuf, 0x%02x\n", | |
668 | man_id); | |
669 | return -ENODEV; | |
40b5cda2 | 670 | } |
52df6440 JD |
671 | |
672 | /* successful detect, print chip info */ | |
673 | die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV); | |
674 | dev_info(&adapter->dev, "found %s revision %u\n", | |
675 | man_id == 0x23 ? "ADM9240" : | |
676 | man_id == 0xda ? "DS1780" : "LM81", die_rev); | |
677 | ||
7fae8283 | 678 | strlcpy(info->type, name, I2C_NAME_SIZE); |
40b5cda2 | 679 | |
7fae8283 JD |
680 | return 0; |
681 | } | |
40b5cda2 | 682 | |
40b5cda2 GC |
683 | static void adm9240_init_client(struct i2c_client *client) |
684 | { | |
685 | struct adm9240_data *data = i2c_get_clientdata(client); | |
205cf13e GC |
686 | u8 conf = i2c_smbus_read_byte_data(client, ADM9240_REG_CONFIG); |
687 | u8 mode = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF) & 3; | |
40b5cda2 | 688 | |
303760b4 | 689 | data->vrm = vid_which_vrm(); /* need this to report vid as mV */ |
40b5cda2 | 690 | |
8e8f9289 GC |
691 | dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10, |
692 | data->vrm % 10); | |
693 | ||
40b5cda2 GC |
694 | if (conf & 1) { /* measurement cycle running: report state */ |
695 | ||
696 | dev_info(&client->dev, "status: config 0x%02x mode %u\n", | |
697 | conf, mode); | |
698 | ||
699 | } else { /* cold start: open limits before starting chip */ | |
700 | int i; | |
701 | ||
c387e4eb | 702 | for (i = 0; i < 6; i++) { |
205cf13e | 703 | i2c_smbus_write_byte_data(client, |
40b5cda2 | 704 | ADM9240_REG_IN_MIN(i), 0); |
205cf13e | 705 | i2c_smbus_write_byte_data(client, |
40b5cda2 GC |
706 | ADM9240_REG_IN_MAX(i), 255); |
707 | } | |
205cf13e GC |
708 | i2c_smbus_write_byte_data(client, |
709 | ADM9240_REG_FAN_MIN(0), 255); | |
710 | i2c_smbus_write_byte_data(client, | |
711 | ADM9240_REG_FAN_MIN(1), 255); | |
712 | i2c_smbus_write_byte_data(client, | |
c7461a66 | 713 | ADM9240_REG_TEMP_MAX(0), 127); |
205cf13e | 714 | i2c_smbus_write_byte_data(client, |
c7461a66 | 715 | ADM9240_REG_TEMP_MAX(1), 127); |
40b5cda2 GC |
716 | |
717 | /* start measurement cycle */ | |
205cf13e | 718 | i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1); |
40b5cda2 | 719 | |
b55f3757 GR |
720 | dev_info(&client->dev, |
721 | "cold start: config was 0x%02x mode %u\n", conf, mode); | |
40b5cda2 GC |
722 | } |
723 | } | |
724 | ||
4341fc3f AL |
725 | static int adm9240_probe(struct i2c_client *new_client, |
726 | const struct i2c_device_id *id) | |
40b5cda2 | 727 | { |
715f69be AL |
728 | struct device *dev = &new_client->dev; |
729 | struct device *hwmon_dev; | |
4341fc3f | 730 | struct adm9240_data *data; |
40b5cda2 | 731 | |
715f69be | 732 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); |
4341fc3f AL |
733 | if (!data) |
734 | return -ENOMEM; | |
40b5cda2 | 735 | |
4341fc3f | 736 | i2c_set_clientdata(new_client, data); |
715f69be | 737 | data->client = new_client; |
4341fc3f | 738 | mutex_init(&data->update_lock); |
40b5cda2 | 739 | |
4341fc3f | 740 | adm9240_init_client(new_client); |
40b5cda2 | 741 | |
715f69be AL |
742 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, |
743 | new_client->name, | |
744 | data, | |
745 | adm9240_groups); | |
746 | return PTR_ERR_OR_ZERO(hwmon_dev); | |
4341fc3f | 747 | } |
40b5cda2 | 748 | |
4341fc3f AL |
749 | static const struct i2c_device_id adm9240_id[] = { |
750 | { "adm9240", adm9240 }, | |
751 | { "ds1780", ds1780 }, | |
752 | { "lm81", lm81 }, | |
753 | { } | |
754 | }; | |
755 | MODULE_DEVICE_TABLE(i2c, adm9240_id); | |
40b5cda2 | 756 | |
4341fc3f AL |
757 | static struct i2c_driver adm9240_driver = { |
758 | .class = I2C_CLASS_HWMON, | |
759 | .driver = { | |
760 | .name = "adm9240", | |
761 | }, | |
762 | .probe = adm9240_probe, | |
4341fc3f AL |
763 | .id_table = adm9240_id, |
764 | .detect = adm9240_detect, | |
765 | .address_list = normal_i2c, | |
766 | }; | |
40b5cda2 | 767 | |
f0967eea | 768 | module_i2c_driver(adm9240_driver); |
40b5cda2 GC |
769 | |
770 | MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, " | |
2ca7b961 | 771 | "Grant Coady <gcoady.lk@gmail.com> and others"); |
40b5cda2 GC |
772 | MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); |
773 | MODULE_LICENSE("GPL"); |