Commit | Line | Data |
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74ba9207 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
40b5cda2 GC |
2 | /* |
3 | * adm9240.c Part of lm_sensors, Linux kernel modules for hardware | |
c387e4eb | 4 | * monitoring |
40b5cda2 GC |
5 | * |
6 | * Copyright (C) 1999 Frodo Looijaard <frodol@dds.nl> | |
7 | * Philip Edelbrock <phil@netroedge.com> | |
8 | * Copyright (C) 2003 Michiel Rook <michiel@grendelproject.nl> | |
2ca7b961 | 9 | * Copyright (C) 2005 Grant Coady <gcoady.lk@gmail.com> with valuable |
c387e4eb | 10 | * guidance from Jean Delvare |
40b5cda2 GC |
11 | * |
12 | * Driver supports Analog Devices ADM9240 | |
13 | * Dallas Semiconductor DS1780 | |
14 | * National Semiconductor LM81 | |
15 | * | |
16 | * ADM9240 is the reference, DS1780 and LM81 are register compatibles | |
17 | * | |
18 | * Voltage Six inputs are scaled by chip, VID also reported | |
19 | * Temperature Chip temperature to 0.5'C, maximum and max_hysteris | |
20 | * Fans 2 fans, low speed alarm, automatic fan clock divider | |
21 | * Alarms 16-bit map of active alarms | |
22 | * Analog Out 0..1250 mV output | |
23 | * | |
0de2b244 | 24 | * Chassis Intrusion: clear CI latch with 'echo 0 > intrusion0_alarm' |
40b5cda2 GC |
25 | * |
26 | * Test hardware: Intel SE440BX-2 desktop motherboard --Grant | |
27 | * | |
28 | * LM81 extended temp reading not implemented | |
40b5cda2 GC |
29 | */ |
30 | ||
31 | #include <linux/init.h> | |
32 | #include <linux/module.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/i2c.h> | |
c7461a66 | 35 | #include <linux/hwmon-sysfs.h> |
943b0830 | 36 | #include <linux/hwmon.h> |
303760b4 | 37 | #include <linux/hwmon-vid.h> |
943b0830 | 38 | #include <linux/err.h> |
9a61bf63 | 39 | #include <linux/mutex.h> |
dcd8f392 | 40 | #include <linux/jiffies.h> |
40b5cda2 GC |
41 | |
42 | /* Addresses to scan */ | |
25e9c86d | 43 | static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, |
40b5cda2 GC |
44 | I2C_CLIENT_END }; |
45 | ||
e5e9f44c | 46 | enum chips { adm9240, ds1780, lm81 }; |
40b5cda2 GC |
47 | |
48 | /* ADM9240 registers */ | |
49 | #define ADM9240_REG_MAN_ID 0x3e | |
50 | #define ADM9240_REG_DIE_REV 0x3f | |
51 | #define ADM9240_REG_CONFIG 0x40 | |
52 | ||
53 | #define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */ | |
54 | #define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2) | |
55 | #define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2) | |
56 | #define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */ | |
57 | #define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr)) | |
58 | #define ADM9240_REG_INT(nr) (0x41 + (nr)) | |
59 | #define ADM9240_REG_INT_MASK(nr) (0x43 + (nr)) | |
60 | #define ADM9240_REG_TEMP 0x27 | |
c7461a66 | 61 | #define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */ |
40b5cda2 GC |
62 | #define ADM9240_REG_ANALOG_OUT 0x19 |
63 | #define ADM9240_REG_CHASSIS_CLEAR 0x46 | |
64 | #define ADM9240_REG_VID_FAN_DIV 0x47 | |
65 | #define ADM9240_REG_I2C_ADDR 0x48 | |
66 | #define ADM9240_REG_VID4 0x49 | |
67 | #define ADM9240_REG_TEMP_CONF 0x4b | |
68 | ||
69 | /* generalised scaling with integer rounding */ | |
70 | static inline int SCALE(long val, int mul, int div) | |
71 | { | |
72 | if (val < 0) | |
73 | return (val * mul - div / 2) / div; | |
74 | else | |
75 | return (val * mul + div / 2) / div; | |
76 | } | |
77 | ||
78 | /* adm9240 internally scales voltage measurements */ | |
79 | static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 }; | |
80 | ||
81 | static inline unsigned int IN_FROM_REG(u8 reg, int n) | |
82 | { | |
83 | return SCALE(reg, nom_mv[n], 192); | |
84 | } | |
85 | ||
86 | static inline u8 IN_TO_REG(unsigned long val, int n) | |
87 | { | |
0fb620c4 GR |
88 | val = clamp_val(val, 0, nom_mv[n] * 255 / 192); |
89 | return SCALE(val, 192, nom_mv[n]); | |
40b5cda2 GC |
90 | } |
91 | ||
92 | /* temperature range: -40..125, 127 disables temperature alarm */ | |
93 | static inline s8 TEMP_TO_REG(long val) | |
94 | { | |
0fb620c4 GR |
95 | val = clamp_val(val, -40000, 127000); |
96 | return SCALE(val, 1, 1000); | |
40b5cda2 GC |
97 | } |
98 | ||
99 | /* two fans, each with low fan speed limit */ | |
100 | static inline unsigned int FAN_FROM_REG(u8 reg, u8 div) | |
101 | { | |
102 | if (!reg) /* error */ | |
103 | return -1; | |
104 | ||
105 | if (reg == 255) | |
106 | return 0; | |
107 | ||
108 | return SCALE(1350000, 1, reg * div); | |
109 | } | |
110 | ||
111 | /* analog out 0..1250mV */ | |
112 | static inline u8 AOUT_TO_REG(unsigned long val) | |
113 | { | |
0fb620c4 GR |
114 | val = clamp_val(val, 0, 1250); |
115 | return SCALE(val, 255, 1250); | |
40b5cda2 GC |
116 | } |
117 | ||
118 | static inline unsigned int AOUT_FROM_REG(u8 reg) | |
119 | { | |
120 | return SCALE(reg, 1250, 255); | |
121 | } | |
122 | ||
40b5cda2 GC |
123 | /* per client data */ |
124 | struct adm9240_data { | |
715f69be | 125 | struct i2c_client *client; |
9a61bf63 | 126 | struct mutex update_lock; |
40b5cda2 GC |
127 | char valid; |
128 | unsigned long last_updated_measure; | |
129 | unsigned long last_updated_config; | |
130 | ||
131 | u8 in[6]; /* ro in0_input */ | |
132 | u8 in_max[6]; /* rw in0_max */ | |
133 | u8 in_min[6]; /* rw in0_min */ | |
134 | u8 fan[2]; /* ro fan1_input */ | |
135 | u8 fan_min[2]; /* rw fan1_min */ | |
136 | u8 fan_div[2]; /* rw fan1_div, read-only accessor */ | |
137 | s16 temp; /* ro temp1_input, 9-bit sign-extended */ | |
c7461a66 | 138 | s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */ |
40b5cda2 | 139 | u16 alarms; /* ro alarms */ |
8e8f9289 | 140 | u8 aout; /* rw aout_output */ |
40b5cda2 GC |
141 | u8 vid; /* ro vid */ |
142 | u8 vrm; /* -- vrm set on startup, no accessor */ | |
143 | }; | |
144 | ||
4341fc3f AL |
145 | /* write new fan div, callers must hold data->update_lock */ |
146 | static void adm9240_write_fan_div(struct i2c_client *client, int nr, | |
147 | u8 fan_div) | |
148 | { | |
149 | u8 reg, old, shift = (nr + 2) * 2; | |
150 | ||
151 | reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); | |
152 | old = (reg >> shift) & 3; | |
153 | reg &= ~(3 << shift); | |
154 | reg |= (fan_div << shift); | |
155 | i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg); | |
156 | dev_dbg(&client->dev, | |
157 | "fan%d clock divider changed from %u to %u\n", | |
158 | nr + 1, 1 << old, 1 << fan_div); | |
159 | } | |
160 | ||
161 | static struct adm9240_data *adm9240_update_device(struct device *dev) | |
162 | { | |
715f69be AL |
163 | struct adm9240_data *data = dev_get_drvdata(dev); |
164 | struct i2c_client *client = data->client; | |
4341fc3f AL |
165 | int i; |
166 | ||
167 | mutex_lock(&data->update_lock); | |
168 | ||
169 | /* minimum measurement cycle: 1.75 seconds */ | |
170 | if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4)) | |
171 | || !data->valid) { | |
172 | ||
173 | for (i = 0; i < 6; i++) { /* read voltages */ | |
174 | data->in[i] = i2c_smbus_read_byte_data(client, | |
175 | ADM9240_REG_IN(i)); | |
176 | } | |
177 | data->alarms = i2c_smbus_read_byte_data(client, | |
178 | ADM9240_REG_INT(0)) | | |
179 | i2c_smbus_read_byte_data(client, | |
180 | ADM9240_REG_INT(1)) << 8; | |
181 | ||
182 | /* | |
183 | * read temperature: assume temperature changes less than | |
184 | * 0.5'C per two measurement cycles thus ignore possible | |
185 | * but unlikely aliasing error on lsb reading. --Grant | |
186 | */ | |
667f4bab | 187 | data->temp = (i2c_smbus_read_byte_data(client, |
4341fc3f AL |
188 | ADM9240_REG_TEMP) << 8) | |
189 | i2c_smbus_read_byte_data(client, | |
667f4bab | 190 | ADM9240_REG_TEMP_CONF); |
4341fc3f AL |
191 | |
192 | for (i = 0; i < 2; i++) { /* read fans */ | |
193 | data->fan[i] = i2c_smbus_read_byte_data(client, | |
194 | ADM9240_REG_FAN(i)); | |
195 | ||
196 | /* adjust fan clock divider on overflow */ | |
197 | if (data->valid && data->fan[i] == 255 && | |
198 | data->fan_div[i] < 3) { | |
199 | ||
200 | adm9240_write_fan_div(client, i, | |
201 | ++data->fan_div[i]); | |
202 | ||
203 | /* adjust fan_min if active, but not to 0 */ | |
204 | if (data->fan_min[i] < 255 && | |
205 | data->fan_min[i] >= 2) | |
206 | data->fan_min[i] /= 2; | |
207 | } | |
208 | } | |
209 | data->last_updated_measure = jiffies; | |
210 | } | |
211 | ||
212 | /* minimum config reading cycle: 300 seconds */ | |
213 | if (time_after(jiffies, data->last_updated_config + (HZ * 300)) | |
214 | || !data->valid) { | |
215 | ||
216 | for (i = 0; i < 6; i++) { | |
217 | data->in_min[i] = i2c_smbus_read_byte_data(client, | |
218 | ADM9240_REG_IN_MIN(i)); | |
219 | data->in_max[i] = i2c_smbus_read_byte_data(client, | |
220 | ADM9240_REG_IN_MAX(i)); | |
221 | } | |
222 | for (i = 0; i < 2; i++) { | |
223 | data->fan_min[i] = i2c_smbus_read_byte_data(client, | |
224 | ADM9240_REG_FAN_MIN(i)); | |
225 | } | |
226 | data->temp_max[0] = i2c_smbus_read_byte_data(client, | |
227 | ADM9240_REG_TEMP_MAX(0)); | |
228 | data->temp_max[1] = i2c_smbus_read_byte_data(client, | |
229 | ADM9240_REG_TEMP_MAX(1)); | |
230 | ||
231 | /* read fan divs and 5-bit VID */ | |
232 | i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); | |
233 | data->fan_div[0] = (i >> 4) & 3; | |
234 | data->fan_div[1] = (i >> 6) & 3; | |
235 | data->vid = i & 0x0f; | |
236 | data->vid |= (i2c_smbus_read_byte_data(client, | |
237 | ADM9240_REG_VID4) & 1) << 4; | |
238 | /* read analog out */ | |
239 | data->aout = i2c_smbus_read_byte_data(client, | |
240 | ADM9240_REG_ANALOG_OUT); | |
241 | ||
242 | data->last_updated_config = jiffies; | |
243 | data->valid = 1; | |
244 | } | |
245 | mutex_unlock(&data->update_lock); | |
246 | return data; | |
247 | } | |
248 | ||
40b5cda2 GC |
249 | /*** sysfs accessors ***/ |
250 | ||
251 | /* temperature */ | |
b5751116 JL |
252 | static ssize_t temp1_input_show(struct device *dev, |
253 | struct device_attribute *dummy, char *buf) | |
c7461a66 GC |
254 | { |
255 | struct adm9240_data *data = adm9240_update_device(dev); | |
667f4bab | 256 | return sprintf(buf, "%d\n", data->temp / 128 * 500); /* 9-bit value */ |
c7461a66 GC |
257 | } |
258 | ||
7352ae8d GR |
259 | static ssize_t max_show(struct device *dev, struct device_attribute *devattr, |
260 | char *buf) | |
c7461a66 GC |
261 | { |
262 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
263 | struct adm9240_data *data = adm9240_update_device(dev); | |
264 | return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000); | |
265 | } | |
266 | ||
7352ae8d GR |
267 | static ssize_t max_store(struct device *dev, struct device_attribute *devattr, |
268 | const char *buf, size_t count) | |
c7461a66 GC |
269 | { |
270 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
715f69be AL |
271 | struct adm9240_data *data = dev_get_drvdata(dev); |
272 | struct i2c_client *client = data->client; | |
c387e4eb GR |
273 | long val; |
274 | int err; | |
275 | ||
276 | err = kstrtol(buf, 10, &val); | |
277 | if (err) | |
278 | return err; | |
c7461a66 | 279 | |
9a61bf63 | 280 | mutex_lock(&data->update_lock); |
c7461a66 GC |
281 | data->temp_max[attr->index] = TEMP_TO_REG(val); |
282 | i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(attr->index), | |
283 | data->temp_max[attr->index]); | |
9a61bf63 | 284 | mutex_unlock(&data->update_lock); |
c7461a66 GC |
285 | return count; |
286 | } | |
287 | ||
b5751116 | 288 | static DEVICE_ATTR_RO(temp1_input); |
7352ae8d GR |
289 | static SENSOR_DEVICE_ATTR_RW(temp1_max, max, 0); |
290 | static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, max, 1); | |
40b5cda2 GC |
291 | |
292 | /* voltage */ | |
7352ae8d GR |
293 | static ssize_t in_show(struct device *dev, struct device_attribute *devattr, |
294 | char *buf) | |
40b5cda2 | 295 | { |
c7461a66 | 296 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 297 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
298 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index], |
299 | attr->index)); | |
40b5cda2 GC |
300 | } |
301 | ||
7352ae8d GR |
302 | static ssize_t in_min_show(struct device *dev, |
303 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 304 | { |
c7461a66 | 305 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 306 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
307 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index], |
308 | attr->index)); | |
40b5cda2 GC |
309 | } |
310 | ||
7352ae8d GR |
311 | static ssize_t in_max_show(struct device *dev, |
312 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 313 | { |
c7461a66 | 314 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 315 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
316 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index], |
317 | attr->index)); | |
40b5cda2 GC |
318 | } |
319 | ||
7352ae8d GR |
320 | static ssize_t in_min_store(struct device *dev, |
321 | struct device_attribute *devattr, const char *buf, | |
322 | size_t count) | |
40b5cda2 | 323 | { |
c7461a66 | 324 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
715f69be AL |
325 | struct adm9240_data *data = dev_get_drvdata(dev); |
326 | struct i2c_client *client = data->client; | |
c387e4eb GR |
327 | unsigned long val; |
328 | int err; | |
329 | ||
330 | err = kstrtoul(buf, 10, &val); | |
331 | if (err) | |
332 | return err; | |
40b5cda2 | 333 | |
9a61bf63 | 334 | mutex_lock(&data->update_lock); |
c7461a66 GC |
335 | data->in_min[attr->index] = IN_TO_REG(val, attr->index); |
336 | i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(attr->index), | |
337 | data->in_min[attr->index]); | |
9a61bf63 | 338 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
339 | return count; |
340 | } | |
341 | ||
7352ae8d GR |
342 | static ssize_t in_max_store(struct device *dev, |
343 | struct device_attribute *devattr, const char *buf, | |
344 | size_t count) | |
40b5cda2 | 345 | { |
c7461a66 | 346 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
715f69be AL |
347 | struct adm9240_data *data = dev_get_drvdata(dev); |
348 | struct i2c_client *client = data->client; | |
c387e4eb GR |
349 | unsigned long val; |
350 | int err; | |
351 | ||
352 | err = kstrtoul(buf, 10, &val); | |
353 | if (err) | |
354 | return err; | |
40b5cda2 | 355 | |
9a61bf63 | 356 | mutex_lock(&data->update_lock); |
c7461a66 GC |
357 | data->in_max[attr->index] = IN_TO_REG(val, attr->index); |
358 | i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(attr->index), | |
359 | data->in_max[attr->index]); | |
9a61bf63 | 360 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
361 | return count; |
362 | } | |
363 | ||
7352ae8d GR |
364 | static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0); |
365 | static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0); | |
366 | static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0); | |
367 | static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1); | |
368 | static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1); | |
369 | static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1); | |
370 | static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2); | |
371 | static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2); | |
372 | static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2); | |
373 | static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3); | |
374 | static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3); | |
375 | static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3); | |
376 | static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4); | |
377 | static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4); | |
378 | static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4); | |
379 | static SENSOR_DEVICE_ATTR_RO(in5_input, in, 5); | |
380 | static SENSOR_DEVICE_ATTR_RW(in5_min, in_min, 5); | |
381 | static SENSOR_DEVICE_ATTR_RW(in5_max, in_max, 5); | |
40b5cda2 GC |
382 | |
383 | /* fans */ | |
7352ae8d GR |
384 | static ssize_t fan_show(struct device *dev, struct device_attribute *devattr, |
385 | char *buf) | |
40b5cda2 | 386 | { |
c7461a66 | 387 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 388 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
389 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index], |
390 | 1 << data->fan_div[attr->index])); | |
40b5cda2 GC |
391 | } |
392 | ||
7352ae8d GR |
393 | static ssize_t fan_min_show(struct device *dev, |
394 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 395 | { |
c7461a66 | 396 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 397 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 GC |
398 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index], |
399 | 1 << data->fan_div[attr->index])); | |
40b5cda2 GC |
400 | } |
401 | ||
7352ae8d GR |
402 | static ssize_t fan_div_show(struct device *dev, |
403 | struct device_attribute *devattr, char *buf) | |
40b5cda2 | 404 | { |
c7461a66 | 405 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
40b5cda2 | 406 | struct adm9240_data *data = adm9240_update_device(dev); |
c7461a66 | 407 | return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]); |
40b5cda2 GC |
408 | } |
409 | ||
e415e48b | 410 | /* |
40b5cda2 GC |
411 | * set fan speed low limit: |
412 | * | |
413 | * - value is zero: disable fan speed low limit alarm | |
414 | * | |
415 | * - value is below fan speed measurement range: enable fan speed low | |
416 | * limit alarm to be asserted while fan speed too slow to measure | |
417 | * | |
418 | * - otherwise: select fan clock divider to suit fan speed low limit, | |
419 | * measurement code may adjust registers to ensure fan speed reading | |
420 | */ | |
7352ae8d GR |
421 | static ssize_t fan_min_store(struct device *dev, |
422 | struct device_attribute *devattr, | |
423 | const char *buf, size_t count) | |
40b5cda2 | 424 | { |
c7461a66 | 425 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
715f69be AL |
426 | struct adm9240_data *data = dev_get_drvdata(dev); |
427 | struct i2c_client *client = data->client; | |
c7461a66 | 428 | int nr = attr->index; |
40b5cda2 | 429 | u8 new_div; |
c387e4eb GR |
430 | unsigned long val; |
431 | int err; | |
432 | ||
433 | err = kstrtoul(buf, 10, &val); | |
434 | if (err) | |
435 | return err; | |
40b5cda2 | 436 | |
9a61bf63 | 437 | mutex_lock(&data->update_lock); |
40b5cda2 GC |
438 | |
439 | if (!val) { | |
440 | data->fan_min[nr] = 255; | |
441 | new_div = data->fan_div[nr]; | |
442 | ||
443 | dev_dbg(&client->dev, "fan%u low limit set disabled\n", | |
444 | nr + 1); | |
445 | ||
446 | } else if (val < 1350000 / (8 * 254)) { | |
447 | new_div = 3; | |
448 | data->fan_min[nr] = 254; | |
449 | ||
450 | dev_dbg(&client->dev, "fan%u low limit set minimum %u\n", | |
451 | nr + 1, FAN_FROM_REG(254, 1 << new_div)); | |
452 | ||
453 | } else { | |
454 | unsigned int new_min = 1350000 / val; | |
455 | ||
456 | new_div = 0; | |
457 | while (new_min > 192 && new_div < 3) { | |
458 | new_div++; | |
459 | new_min /= 2; | |
460 | } | |
461 | if (!new_min) /* keep > 0 */ | |
462 | new_min++; | |
463 | ||
464 | data->fan_min[nr] = new_min; | |
465 | ||
466 | dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n", | |
467 | nr + 1, FAN_FROM_REG(new_min, 1 << new_div)); | |
468 | } | |
469 | ||
470 | if (new_div != data->fan_div[nr]) { | |
471 | data->fan_div[nr] = new_div; | |
472 | adm9240_write_fan_div(client, nr, new_div); | |
473 | } | |
205cf13e | 474 | i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr), |
40b5cda2 GC |
475 | data->fan_min[nr]); |
476 | ||
9a61bf63 | 477 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
478 | return count; |
479 | } | |
480 | ||
7352ae8d GR |
481 | static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); |
482 | static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); | |
483 | static SENSOR_DEVICE_ATTR_RO(fan1_div, fan_div, 0); | |
484 | static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); | |
485 | static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); | |
486 | static SENSOR_DEVICE_ATTR_RO(fan2_div, fan_div, 1); | |
40b5cda2 GC |
487 | |
488 | /* alarms */ | |
b5751116 | 489 | static ssize_t alarms_show(struct device *dev, |
e415e48b | 490 | struct device_attribute *attr, char *buf) |
40b5cda2 GC |
491 | { |
492 | struct adm9240_data *data = adm9240_update_device(dev); | |
493 | return sprintf(buf, "%u\n", data->alarms); | |
494 | } | |
b5751116 | 495 | static DEVICE_ATTR_RO(alarms); |
40b5cda2 | 496 | |
7352ae8d GR |
497 | static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, |
498 | char *buf) | |
360f9452 JD |
499 | { |
500 | int bitnr = to_sensor_dev_attr(attr)->index; | |
501 | struct adm9240_data *data = adm9240_update_device(dev); | |
502 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); | |
503 | } | |
7352ae8d GR |
504 | static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0); |
505 | static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1); | |
506 | static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2); | |
507 | static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3); | |
508 | static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8); | |
509 | static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 9); | |
510 | static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4); | |
511 | static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6); | |
512 | static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7); | |
360f9452 | 513 | |
40b5cda2 | 514 | /* vid */ |
b5751116 JL |
515 | static ssize_t cpu0_vid_show(struct device *dev, |
516 | struct device_attribute *attr, char *buf) | |
40b5cda2 GC |
517 | { |
518 | struct adm9240_data *data = adm9240_update_device(dev); | |
519 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); | |
520 | } | |
b5751116 | 521 | static DEVICE_ATTR_RO(cpu0_vid); |
40b5cda2 GC |
522 | |
523 | /* analog output */ | |
b5751116 JL |
524 | static ssize_t aout_output_show(struct device *dev, |
525 | struct device_attribute *attr, char *buf) | |
40b5cda2 GC |
526 | { |
527 | struct adm9240_data *data = adm9240_update_device(dev); | |
528 | return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); | |
529 | } | |
530 | ||
b5751116 JL |
531 | static ssize_t aout_output_store(struct device *dev, |
532 | struct device_attribute *attr, | |
533 | const char *buf, size_t count) | |
40b5cda2 | 534 | { |
715f69be AL |
535 | struct adm9240_data *data = dev_get_drvdata(dev); |
536 | struct i2c_client *client = data->client; | |
c387e4eb GR |
537 | long val; |
538 | int err; | |
539 | ||
540 | err = kstrtol(buf, 10, &val); | |
541 | if (err) | |
542 | return err; | |
40b5cda2 | 543 | |
9a61bf63 | 544 | mutex_lock(&data->update_lock); |
40b5cda2 | 545 | data->aout = AOUT_TO_REG(val); |
205cf13e | 546 | i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout); |
9a61bf63 | 547 | mutex_unlock(&data->update_lock); |
40b5cda2 GC |
548 | return count; |
549 | } | |
b5751116 | 550 | static DEVICE_ATTR_RW(aout_output); |
40b5cda2 | 551 | |
7352ae8d GR |
552 | static ssize_t alarm_store(struct device *dev, struct device_attribute *attr, |
553 | const char *buf, size_t count) | |
0de2b244 | 554 | { |
715f69be AL |
555 | struct adm9240_data *data = dev_get_drvdata(dev); |
556 | struct i2c_client *client = data->client; | |
0de2b244 JD |
557 | unsigned long val; |
558 | ||
179c4fdb | 559 | if (kstrtoul(buf, 10, &val) || val != 0) |
0de2b244 JD |
560 | return -EINVAL; |
561 | ||
562 | mutex_lock(&data->update_lock); | |
563 | i2c_smbus_write_byte_data(client, ADM9240_REG_CHASSIS_CLEAR, 0x80); | |
564 | data->valid = 0; /* Force cache refresh */ | |
565 | mutex_unlock(&data->update_lock); | |
566 | dev_dbg(&client->dev, "chassis intrusion latch cleared\n"); | |
567 | ||
568 | return count; | |
569 | } | |
7352ae8d | 570 | static SENSOR_DEVICE_ATTR_RW(intrusion0_alarm, alarm, 12); |
40b5cda2 | 571 | |
715f69be | 572 | static struct attribute *adm9240_attrs[] = { |
681c6f7a MH |
573 | &sensor_dev_attr_in0_input.dev_attr.attr, |
574 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
575 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
360f9452 | 576 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
681c6f7a MH |
577 | &sensor_dev_attr_in1_input.dev_attr.attr, |
578 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
579 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
360f9452 | 580 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
681c6f7a MH |
581 | &sensor_dev_attr_in2_input.dev_attr.attr, |
582 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
583 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
360f9452 | 584 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
681c6f7a MH |
585 | &sensor_dev_attr_in3_input.dev_attr.attr, |
586 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
587 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
360f9452 | 588 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
681c6f7a MH |
589 | &sensor_dev_attr_in4_input.dev_attr.attr, |
590 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
591 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
360f9452 | 592 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
681c6f7a MH |
593 | &sensor_dev_attr_in5_input.dev_attr.attr, |
594 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
595 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
360f9452 | 596 | &sensor_dev_attr_in5_alarm.dev_attr.attr, |
681c6f7a MH |
597 | &dev_attr_temp1_input.attr, |
598 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
599 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, | |
360f9452 | 600 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
681c6f7a MH |
601 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
602 | &sensor_dev_attr_fan1_div.dev_attr.attr, | |
603 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
360f9452 | 604 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, |
681c6f7a MH |
605 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
606 | &sensor_dev_attr_fan2_div.dev_attr.attr, | |
607 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
360f9452 | 608 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, |
681c6f7a MH |
609 | &dev_attr_alarms.attr, |
610 | &dev_attr_aout_output.attr, | |
0de2b244 | 611 | &sensor_dev_attr_intrusion0_alarm.dev_attr.attr, |
681c6f7a MH |
612 | &dev_attr_cpu0_vid.attr, |
613 | NULL | |
614 | }; | |
615 | ||
715f69be | 616 | ATTRIBUTE_GROUPS(adm9240); |
681c6f7a | 617 | |
40b5cda2 GC |
618 | /*** sensor chip detect and driver install ***/ |
619 | ||
7fae8283 | 620 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
310ec792 | 621 | static int adm9240_detect(struct i2c_client *new_client, |
7fae8283 | 622 | struct i2c_board_info *info) |
40b5cda2 | 623 | { |
7fae8283 | 624 | struct i2c_adapter *adapter = new_client->adapter; |
40b5cda2 | 625 | const char *name = ""; |
7fae8283 | 626 | int address = new_client->addr; |
40b5cda2 GC |
627 | u8 man_id, die_rev; |
628 | ||
629 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
7fae8283 | 630 | return -ENODEV; |
40b5cda2 | 631 | |
52df6440 JD |
632 | /* verify chip: reg address should match i2c address */ |
633 | if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR) | |
634 | != address) { | |
635 | dev_err(&adapter->dev, "detect fail: address match, 0x%02x\n", | |
636 | address); | |
637 | return -ENODEV; | |
40b5cda2 GC |
638 | } |
639 | ||
52df6440 JD |
640 | /* check known chip manufacturer */ |
641 | man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID); | |
642 | if (man_id == 0x23) { | |
40b5cda2 | 643 | name = "adm9240"; |
52df6440 | 644 | } else if (man_id == 0xda) { |
40b5cda2 | 645 | name = "ds1780"; |
52df6440 | 646 | } else if (man_id == 0x01) { |
40b5cda2 | 647 | name = "lm81"; |
52df6440 JD |
648 | } else { |
649 | dev_err(&adapter->dev, "detect fail: unknown manuf, 0x%02x\n", | |
650 | man_id); | |
651 | return -ENODEV; | |
40b5cda2 | 652 | } |
52df6440 JD |
653 | |
654 | /* successful detect, print chip info */ | |
655 | die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV); | |
656 | dev_info(&adapter->dev, "found %s revision %u\n", | |
657 | man_id == 0x23 ? "ADM9240" : | |
658 | man_id == 0xda ? "DS1780" : "LM81", die_rev); | |
659 | ||
7fae8283 | 660 | strlcpy(info->type, name, I2C_NAME_SIZE); |
40b5cda2 | 661 | |
7fae8283 JD |
662 | return 0; |
663 | } | |
40b5cda2 | 664 | |
40b5cda2 GC |
665 | static void adm9240_init_client(struct i2c_client *client) |
666 | { | |
667 | struct adm9240_data *data = i2c_get_clientdata(client); | |
205cf13e GC |
668 | u8 conf = i2c_smbus_read_byte_data(client, ADM9240_REG_CONFIG); |
669 | u8 mode = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF) & 3; | |
40b5cda2 | 670 | |
303760b4 | 671 | data->vrm = vid_which_vrm(); /* need this to report vid as mV */ |
40b5cda2 | 672 | |
8e8f9289 GC |
673 | dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10, |
674 | data->vrm % 10); | |
675 | ||
40b5cda2 GC |
676 | if (conf & 1) { /* measurement cycle running: report state */ |
677 | ||
678 | dev_info(&client->dev, "status: config 0x%02x mode %u\n", | |
679 | conf, mode); | |
680 | ||
681 | } else { /* cold start: open limits before starting chip */ | |
682 | int i; | |
683 | ||
c387e4eb | 684 | for (i = 0; i < 6; i++) { |
205cf13e | 685 | i2c_smbus_write_byte_data(client, |
40b5cda2 | 686 | ADM9240_REG_IN_MIN(i), 0); |
205cf13e | 687 | i2c_smbus_write_byte_data(client, |
40b5cda2 GC |
688 | ADM9240_REG_IN_MAX(i), 255); |
689 | } | |
205cf13e GC |
690 | i2c_smbus_write_byte_data(client, |
691 | ADM9240_REG_FAN_MIN(0), 255); | |
692 | i2c_smbus_write_byte_data(client, | |
693 | ADM9240_REG_FAN_MIN(1), 255); | |
694 | i2c_smbus_write_byte_data(client, | |
c7461a66 | 695 | ADM9240_REG_TEMP_MAX(0), 127); |
205cf13e | 696 | i2c_smbus_write_byte_data(client, |
c7461a66 | 697 | ADM9240_REG_TEMP_MAX(1), 127); |
40b5cda2 GC |
698 | |
699 | /* start measurement cycle */ | |
205cf13e | 700 | i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1); |
40b5cda2 | 701 | |
b55f3757 GR |
702 | dev_info(&client->dev, |
703 | "cold start: config was 0x%02x mode %u\n", conf, mode); | |
40b5cda2 GC |
704 | } |
705 | } | |
706 | ||
4341fc3f AL |
707 | static int adm9240_probe(struct i2c_client *new_client, |
708 | const struct i2c_device_id *id) | |
40b5cda2 | 709 | { |
715f69be AL |
710 | struct device *dev = &new_client->dev; |
711 | struct device *hwmon_dev; | |
4341fc3f | 712 | struct adm9240_data *data; |
40b5cda2 | 713 | |
715f69be | 714 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); |
4341fc3f AL |
715 | if (!data) |
716 | return -ENOMEM; | |
40b5cda2 | 717 | |
4341fc3f | 718 | i2c_set_clientdata(new_client, data); |
715f69be | 719 | data->client = new_client; |
4341fc3f | 720 | mutex_init(&data->update_lock); |
40b5cda2 | 721 | |
4341fc3f | 722 | adm9240_init_client(new_client); |
40b5cda2 | 723 | |
715f69be AL |
724 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, |
725 | new_client->name, | |
726 | data, | |
727 | adm9240_groups); | |
728 | return PTR_ERR_OR_ZERO(hwmon_dev); | |
4341fc3f | 729 | } |
40b5cda2 | 730 | |
4341fc3f AL |
731 | static const struct i2c_device_id adm9240_id[] = { |
732 | { "adm9240", adm9240 }, | |
733 | { "ds1780", ds1780 }, | |
734 | { "lm81", lm81 }, | |
735 | { } | |
736 | }; | |
737 | MODULE_DEVICE_TABLE(i2c, adm9240_id); | |
40b5cda2 | 738 | |
4341fc3f AL |
739 | static struct i2c_driver adm9240_driver = { |
740 | .class = I2C_CLASS_HWMON, | |
741 | .driver = { | |
742 | .name = "adm9240", | |
743 | }, | |
744 | .probe = adm9240_probe, | |
4341fc3f AL |
745 | .id_table = adm9240_id, |
746 | .detect = adm9240_detect, | |
747 | .address_list = normal_i2c, | |
748 | }; | |
40b5cda2 | 749 | |
f0967eea | 750 | module_i2c_driver(adm9240_driver); |
40b5cda2 GC |
751 | |
752 | MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, " | |
2ca7b961 | 753 | "Grant Coady <gcoady.lk@gmail.com> and others"); |
40b5cda2 GC |
754 | MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); |
755 | MODULE_LICENSE("GPL"); |