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74ba9207 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
59ac8367 | 2 | /* |
7cc3cb66 GR |
3 | * smsc47m192.c - Support for hardware monitoring block of |
4 | * SMSC LPC47M192 and compatible Super I/O chips | |
5 | * | |
6 | * Copyright (C) 2006 Hartmut Rick <linux@rick.claranet.de> | |
7 | * | |
8 | * Derived from lm78.c and other chip drivers. | |
7cc3cb66 | 9 | */ |
59ac8367 HR |
10 | |
11 | #include <linux/module.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/slab.h> | |
14 | #include <linux/jiffies.h> | |
15 | #include <linux/i2c.h> | |
16 | #include <linux/hwmon.h> | |
17 | #include <linux/hwmon-sysfs.h> | |
18 | #include <linux/hwmon-vid.h> | |
19 | #include <linux/err.h> | |
ce8c6ce1 | 20 | #include <linux/sysfs.h> |
e4a7167f | 21 | #include <linux/mutex.h> |
59ac8367 HR |
22 | |
23 | /* Addresses to scan */ | |
25e9c86d | 24 | static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END }; |
59ac8367 | 25 | |
59ac8367 | 26 | /* SMSC47M192 registers */ |
7cc3cb66 | 27 | #define SMSC47M192_REG_IN(nr) ((nr) < 6 ? (0x20 + (nr)) : \ |
59ac8367 | 28 | (0x50 + (nr) - 6)) |
7cc3cb66 | 29 | #define SMSC47M192_REG_IN_MAX(nr) ((nr) < 6 ? (0x2b + (nr) * 2) : \ |
59ac8367 | 30 | (0x54 + (((nr) - 6) * 2))) |
7cc3cb66 | 31 | #define SMSC47M192_REG_IN_MIN(nr) ((nr) < 6 ? (0x2c + (nr) * 2) : \ |
59ac8367 HR |
32 | (0x55 + (((nr) - 6) * 2))) |
33 | static u8 SMSC47M192_REG_TEMP[3] = { 0x27, 0x26, 0x52 }; | |
34 | static u8 SMSC47M192_REG_TEMP_MAX[3] = { 0x39, 0x37, 0x58 }; | |
35 | static u8 SMSC47M192_REG_TEMP_MIN[3] = { 0x3A, 0x38, 0x59 }; | |
7cc3cb66 | 36 | #define SMSC47M192_REG_TEMP_OFFSET(nr) ((nr) == 2 ? 0x1e : 0x1f) |
59ac8367 HR |
37 | #define SMSC47M192_REG_ALARM1 0x41 |
38 | #define SMSC47M192_REG_ALARM2 0x42 | |
39 | #define SMSC47M192_REG_VID 0x47 | |
40 | #define SMSC47M192_REG_VID4 0x49 | |
41 | #define SMSC47M192_REG_CONFIG 0x40 | |
42 | #define SMSC47M192_REG_SFR 0x4f | |
43 | #define SMSC47M192_REG_COMPANY_ID 0x3e | |
44 | #define SMSC47M192_REG_VERSION 0x3f | |
45 | ||
46 | /* generalised scaling with integer rounding */ | |
47 | static inline int SCALE(long val, int mul, int div) | |
48 | { | |
49 | if (val < 0) | |
50 | return (val * mul - div / 2) / div; | |
51 | else | |
52 | return (val * mul + div / 2) / div; | |
53 | } | |
54 | ||
55 | /* Conversions */ | |
56 | ||
57 | /* smsc47m192 internally scales voltage measurements */ | |
58 | static const u16 nom_mv[] = { 2500, 2250, 3300, 5000, 12000, 3300, 1500, 1800 }; | |
59 | ||
60 | static inline unsigned int IN_FROM_REG(u8 reg, int n) | |
61 | { | |
62 | return SCALE(reg, nom_mv[n], 192); | |
63 | } | |
64 | ||
65 | static inline u8 IN_TO_REG(unsigned long val, int n) | |
66 | { | |
78305ae7 GR |
67 | val = clamp_val(val, 0, nom_mv[n] * 255 / 192); |
68 | return SCALE(val, 192, nom_mv[n]); | |
59ac8367 HR |
69 | } |
70 | ||
7cc3cb66 GR |
71 | /* |
72 | * TEMP: 0.001 degC units (-128C to +127C) | |
73 | * REG: 1C/bit, two's complement | |
74 | */ | |
78305ae7 | 75 | static inline s8 TEMP_TO_REG(long val) |
59ac8367 | 76 | { |
043572d5 | 77 | return SCALE(clamp_val(val, -128000, 127000), 1, 1000); |
59ac8367 HR |
78 | } |
79 | ||
80 | static inline int TEMP_FROM_REG(s8 val) | |
81 | { | |
82 | return val * 1000; | |
83 | } | |
84 | ||
85 | struct smsc47m192_data { | |
166f7296 AL |
86 | struct i2c_client *client; |
87 | const struct attribute_group *groups[3]; | |
e4a7167f | 88 | struct mutex update_lock; |
59ac8367 HR |
89 | char valid; /* !=0 if following fields are valid */ |
90 | unsigned long last_updated; /* In jiffies */ | |
91 | ||
92 | u8 in[8]; /* Register value */ | |
93 | u8 in_max[8]; /* Register value */ | |
94 | u8 in_min[8]; /* Register value */ | |
95 | s8 temp[3]; /* Register value */ | |
96 | s8 temp_max[3]; /* Register value */ | |
97 | s8 temp_min[3]; /* Register value */ | |
98 | s8 temp_offset[3]; /* Register value */ | |
99 | u16 alarms; /* Register encoding, combined */ | |
100 | u8 vid; /* Register encoding, combined */ | |
101 | u8 vrm; | |
102 | }; | |
103 | ||
94314e25 AL |
104 | static struct smsc47m192_data *smsc47m192_update_device(struct device *dev) |
105 | { | |
166f7296 AL |
106 | struct smsc47m192_data *data = dev_get_drvdata(dev); |
107 | struct i2c_client *client = data->client; | |
94314e25 | 108 | int i, config; |
59ac8367 | 109 | |
94314e25 | 110 | mutex_lock(&data->update_lock); |
8fb597bb | 111 | |
94314e25 AL |
112 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) |
113 | || !data->valid) { | |
114 | u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); | |
115 | ||
116 | dev_dbg(&client->dev, "Starting smsc47m192 update\n"); | |
117 | ||
118 | for (i = 0; i <= 7; i++) { | |
119 | data->in[i] = i2c_smbus_read_byte_data(client, | |
120 | SMSC47M192_REG_IN(i)); | |
121 | data->in_min[i] = i2c_smbus_read_byte_data(client, | |
122 | SMSC47M192_REG_IN_MIN(i)); | |
123 | data->in_max[i] = i2c_smbus_read_byte_data(client, | |
124 | SMSC47M192_REG_IN_MAX(i)); | |
125 | } | |
126 | for (i = 0; i < 3; i++) { | |
127 | data->temp[i] = i2c_smbus_read_byte_data(client, | |
128 | SMSC47M192_REG_TEMP[i]); | |
129 | data->temp_max[i] = i2c_smbus_read_byte_data(client, | |
130 | SMSC47M192_REG_TEMP_MAX[i]); | |
131 | data->temp_min[i] = i2c_smbus_read_byte_data(client, | |
132 | SMSC47M192_REG_TEMP_MIN[i]); | |
133 | } | |
134 | for (i = 1; i < 3; i++) | |
135 | data->temp_offset[i] = i2c_smbus_read_byte_data(client, | |
136 | SMSC47M192_REG_TEMP_OFFSET(i)); | |
137 | /* | |
138 | * first offset is temp_offset[0] if SFR bit 4 is set, | |
139 | * temp_offset[1] otherwise | |
140 | */ | |
141 | if (sfr & 0x10) { | |
142 | data->temp_offset[0] = data->temp_offset[1]; | |
143 | data->temp_offset[1] = 0; | |
144 | } else | |
145 | data->temp_offset[0] = 0; | |
146 | ||
147 | data->vid = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VID) | |
148 | & 0x0f; | |
149 | config = i2c_smbus_read_byte_data(client, | |
150 | SMSC47M192_REG_CONFIG); | |
151 | if (config & 0x20) | |
152 | data->vid |= (i2c_smbus_read_byte_data(client, | |
153 | SMSC47M192_REG_VID4) & 0x01) << 4; | |
154 | data->alarms = i2c_smbus_read_byte_data(client, | |
155 | SMSC47M192_REG_ALARM1) | | |
156 | (i2c_smbus_read_byte_data(client, | |
157 | SMSC47M192_REG_ALARM2) << 8); | |
158 | ||
159 | data->last_updated = jiffies; | |
160 | data->valid = 1; | |
161 | } | |
162 | ||
163 | mutex_unlock(&data->update_lock); | |
164 | ||
165 | return data; | |
166 | } | |
59ac8367 HR |
167 | |
168 | /* Voltages */ | |
f2bec7ea GR |
169 | static ssize_t in_show(struct device *dev, struct device_attribute *attr, |
170 | char *buf) | |
59ac8367 HR |
171 | { |
172 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
173 | int nr = sensor_attr->index; | |
174 | struct smsc47m192_data *data = smsc47m192_update_device(dev); | |
175 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr)); | |
176 | } | |
177 | ||
f2bec7ea GR |
178 | static ssize_t in_min_show(struct device *dev, struct device_attribute *attr, |
179 | char *buf) | |
59ac8367 HR |
180 | { |
181 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
182 | int nr = sensor_attr->index; | |
183 | struct smsc47m192_data *data = smsc47m192_update_device(dev); | |
184 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr)); | |
185 | } | |
186 | ||
f2bec7ea GR |
187 | static ssize_t in_max_show(struct device *dev, struct device_attribute *attr, |
188 | char *buf) | |
59ac8367 HR |
189 | { |
190 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
191 | int nr = sensor_attr->index; | |
192 | struct smsc47m192_data *data = smsc47m192_update_device(dev); | |
193 | return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr)); | |
194 | } | |
195 | ||
f2bec7ea GR |
196 | static ssize_t in_min_store(struct device *dev, struct device_attribute *attr, |
197 | const char *buf, size_t count) | |
59ac8367 HR |
198 | { |
199 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
200 | int nr = sensor_attr->index; | |
166f7296 AL |
201 | struct smsc47m192_data *data = dev_get_drvdata(dev); |
202 | struct i2c_client *client = data->client; | |
7cc3cb66 GR |
203 | unsigned long val; |
204 | int err; | |
205 | ||
206 | err = kstrtoul(buf, 10, &val); | |
207 | if (err) | |
208 | return err; | |
59ac8367 | 209 | |
e4a7167f | 210 | mutex_lock(&data->update_lock); |
59ac8367 HR |
211 | data->in_min[nr] = IN_TO_REG(val, nr); |
212 | i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MIN(nr), | |
213 | data->in_min[nr]); | |
e4a7167f | 214 | mutex_unlock(&data->update_lock); |
59ac8367 HR |
215 | return count; |
216 | } | |
217 | ||
f2bec7ea GR |
218 | static ssize_t in_max_store(struct device *dev, struct device_attribute *attr, |
219 | const char *buf, size_t count) | |
59ac8367 HR |
220 | { |
221 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
222 | int nr = sensor_attr->index; | |
166f7296 AL |
223 | struct smsc47m192_data *data = dev_get_drvdata(dev); |
224 | struct i2c_client *client = data->client; | |
7cc3cb66 GR |
225 | unsigned long val; |
226 | int err; | |
227 | ||
228 | err = kstrtoul(buf, 10, &val); | |
229 | if (err) | |
230 | return err; | |
59ac8367 | 231 | |
e4a7167f | 232 | mutex_lock(&data->update_lock); |
59ac8367 HR |
233 | data->in_max[nr] = IN_TO_REG(val, nr); |
234 | i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MAX(nr), | |
235 | data->in_max[nr]); | |
e4a7167f | 236 | mutex_unlock(&data->update_lock); |
59ac8367 HR |
237 | return count; |
238 | } | |
239 | ||
f2bec7ea GR |
240 | static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0); |
241 | static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0); | |
242 | static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0); | |
243 | static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1); | |
244 | static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1); | |
245 | static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1); | |
246 | static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2); | |
247 | static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2); | |
248 | static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2); | |
249 | static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3); | |
250 | static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3); | |
251 | static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3); | |
252 | static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4); | |
253 | static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4); | |
254 | static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4); | |
255 | static SENSOR_DEVICE_ATTR_RO(in5_input, in, 5); | |
256 | static SENSOR_DEVICE_ATTR_RW(in5_min, in_min, 5); | |
257 | static SENSOR_DEVICE_ATTR_RW(in5_max, in_max, 5); | |
258 | static SENSOR_DEVICE_ATTR_RO(in6_input, in, 6); | |
259 | static SENSOR_DEVICE_ATTR_RW(in6_min, in_min, 6); | |
260 | static SENSOR_DEVICE_ATTR_RW(in6_max, in_max, 6); | |
261 | static SENSOR_DEVICE_ATTR_RO(in7_input, in, 7); | |
262 | static SENSOR_DEVICE_ATTR_RW(in7_min, in_min, 7); | |
263 | static SENSOR_DEVICE_ATTR_RW(in7_max, in_max, 7); | |
59ac8367 HR |
264 | |
265 | /* Temperatures */ | |
f2bec7ea GR |
266 | static ssize_t temp_show(struct device *dev, struct device_attribute *attr, |
267 | char *buf) | |
59ac8367 HR |
268 | { |
269 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
270 | int nr = sensor_attr->index; | |
271 | struct smsc47m192_data *data = smsc47m192_update_device(dev); | |
272 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); | |
273 | } | |
274 | ||
f2bec7ea GR |
275 | static ssize_t temp_min_show(struct device *dev, |
276 | struct device_attribute *attr, char *buf) | |
59ac8367 HR |
277 | { |
278 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
279 | int nr = sensor_attr->index; | |
280 | struct smsc47m192_data *data = smsc47m192_update_device(dev); | |
281 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr])); | |
282 | } | |
283 | ||
f2bec7ea GR |
284 | static ssize_t temp_max_show(struct device *dev, |
285 | struct device_attribute *attr, char *buf) | |
59ac8367 HR |
286 | { |
287 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
288 | int nr = sensor_attr->index; | |
289 | struct smsc47m192_data *data = smsc47m192_update_device(dev); | |
290 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr])); | |
291 | } | |
292 | ||
f2bec7ea GR |
293 | static ssize_t temp_min_store(struct device *dev, |
294 | struct device_attribute *attr, const char *buf, | |
295 | size_t count) | |
59ac8367 HR |
296 | { |
297 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
298 | int nr = sensor_attr->index; | |
166f7296 AL |
299 | struct smsc47m192_data *data = dev_get_drvdata(dev); |
300 | struct i2c_client *client = data->client; | |
7cc3cb66 GR |
301 | long val; |
302 | int err; | |
303 | ||
304 | err = kstrtol(buf, 10, &val); | |
305 | if (err) | |
306 | return err; | |
59ac8367 | 307 | |
e4a7167f | 308 | mutex_lock(&data->update_lock); |
59ac8367 HR |
309 | data->temp_min[nr] = TEMP_TO_REG(val); |
310 | i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MIN[nr], | |
311 | data->temp_min[nr]); | |
e4a7167f | 312 | mutex_unlock(&data->update_lock); |
59ac8367 HR |
313 | return count; |
314 | } | |
315 | ||
f2bec7ea GR |
316 | static ssize_t temp_max_store(struct device *dev, |
317 | struct device_attribute *attr, const char *buf, | |
318 | size_t count) | |
59ac8367 HR |
319 | { |
320 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
321 | int nr = sensor_attr->index; | |
166f7296 AL |
322 | struct smsc47m192_data *data = dev_get_drvdata(dev); |
323 | struct i2c_client *client = data->client; | |
7cc3cb66 GR |
324 | long val; |
325 | int err; | |
326 | ||
327 | err = kstrtol(buf, 10, &val); | |
328 | if (err) | |
329 | return err; | |
59ac8367 | 330 | |
e4a7167f | 331 | mutex_lock(&data->update_lock); |
59ac8367 HR |
332 | data->temp_max[nr] = TEMP_TO_REG(val); |
333 | i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MAX[nr], | |
334 | data->temp_max[nr]); | |
e4a7167f | 335 | mutex_unlock(&data->update_lock); |
59ac8367 HR |
336 | return count; |
337 | } | |
338 | ||
f2bec7ea GR |
339 | static ssize_t temp_offset_show(struct device *dev, |
340 | struct device_attribute *attr, char *buf) | |
59ac8367 HR |
341 | { |
342 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
343 | int nr = sensor_attr->index; | |
344 | struct smsc47m192_data *data = smsc47m192_update_device(dev); | |
345 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_offset[nr])); | |
346 | } | |
347 | ||
f2bec7ea GR |
348 | static ssize_t temp_offset_store(struct device *dev, |
349 | struct device_attribute *attr, | |
350 | const char *buf, size_t count) | |
59ac8367 HR |
351 | { |
352 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
353 | int nr = sensor_attr->index; | |
166f7296 AL |
354 | struct smsc47m192_data *data = dev_get_drvdata(dev); |
355 | struct i2c_client *client = data->client; | |
59ac8367 | 356 | u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); |
7cc3cb66 GR |
357 | long val; |
358 | int err; | |
359 | ||
360 | err = kstrtol(buf, 10, &val); | |
361 | if (err) | |
362 | return err; | |
59ac8367 | 363 | |
e4a7167f | 364 | mutex_lock(&data->update_lock); |
59ac8367 | 365 | data->temp_offset[nr] = TEMP_TO_REG(val); |
7cc3cb66 | 366 | if (nr > 1) |
59ac8367 HR |
367 | i2c_smbus_write_byte_data(client, |
368 | SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]); | |
369 | else if (data->temp_offset[nr] != 0) { | |
7cc3cb66 GR |
370 | /* |
371 | * offset[0] and offset[1] share the same register, | |
372 | * SFR bit 4 activates offset[0] | |
373 | */ | |
59ac8367 | 374 | i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR, |
7cc3cb66 | 375 | (sfr & 0xef) | (nr == 0 ? 0x10 : 0)); |
59ac8367 HR |
376 | data->temp_offset[1-nr] = 0; |
377 | i2c_smbus_write_byte_data(client, | |
378 | SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]); | |
7cc3cb66 | 379 | } else if ((sfr & 0x10) == (nr == 0 ? 0x10 : 0)) |
59ac8367 HR |
380 | i2c_smbus_write_byte_data(client, |
381 | SMSC47M192_REG_TEMP_OFFSET(nr), 0); | |
e4a7167f | 382 | mutex_unlock(&data->update_lock); |
59ac8367 HR |
383 | return count; |
384 | } | |
385 | ||
f2bec7ea GR |
386 | static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0); |
387 | static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0); | |
388 | static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0); | |
389 | static SENSOR_DEVICE_ATTR_RW(temp1_offset, temp_offset, 0); | |
390 | static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); | |
391 | static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1); | |
392 | static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1); | |
393 | static SENSOR_DEVICE_ATTR_RW(temp2_offset, temp_offset, 1); | |
394 | static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); | |
395 | static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_min, 2); | |
396 | static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2); | |
397 | static SENSOR_DEVICE_ATTR_RW(temp3_offset, temp_offset, 2); | |
59ac8367 HR |
398 | |
399 | /* VID */ | |
2d1c4cf1 JL |
400 | static ssize_t cpu0_vid_show(struct device *dev, |
401 | struct device_attribute *attr, char *buf) | |
59ac8367 HR |
402 | { |
403 | struct smsc47m192_data *data = smsc47m192_update_device(dev); | |
404 | return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); | |
405 | } | |
2d1c4cf1 | 406 | static DEVICE_ATTR_RO(cpu0_vid); |
59ac8367 | 407 | |
2d1c4cf1 | 408 | static ssize_t vrm_show(struct device *dev, struct device_attribute *attr, |
59ac8367 HR |
409 | char *buf) |
410 | { | |
90d6619a | 411 | struct smsc47m192_data *data = dev_get_drvdata(dev); |
59ac8367 HR |
412 | return sprintf(buf, "%d\n", data->vrm); |
413 | } | |
414 | ||
2d1c4cf1 JL |
415 | static ssize_t vrm_store(struct device *dev, struct device_attribute *attr, |
416 | const char *buf, size_t count) | |
59ac8367 | 417 | { |
8f74efe8 | 418 | struct smsc47m192_data *data = dev_get_drvdata(dev); |
7cc3cb66 GR |
419 | unsigned long val; |
420 | int err; | |
421 | ||
422 | err = kstrtoul(buf, 10, &val); | |
423 | if (err) | |
424 | return err; | |
043572d5 GR |
425 | if (val > 255) |
426 | return -EINVAL; | |
7cc3cb66 GR |
427 | |
428 | data->vrm = val; | |
59ac8367 HR |
429 | return count; |
430 | } | |
2d1c4cf1 | 431 | static DEVICE_ATTR_RW(vrm); |
59ac8367 HR |
432 | |
433 | /* Alarms */ | |
f2bec7ea GR |
434 | static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, |
435 | char *buf) | |
59ac8367 HR |
436 | { |
437 | struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); | |
438 | int nr = sensor_attr->index; | |
439 | struct smsc47m192_data *data = smsc47m192_update_device(dev); | |
440 | return sprintf(buf, "%u\n", (data->alarms & nr) ? 1 : 0); | |
441 | } | |
442 | ||
f2bec7ea GR |
443 | static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 0x0010); |
444 | static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 0x0020); | |
445 | static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 0x0040); | |
446 | static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 0x4000); | |
447 | static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 0x8000); | |
448 | static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0x0001); | |
449 | static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 0x0002); | |
450 | static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 0x0004); | |
451 | static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 0x0008); | |
452 | static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 0x0100); | |
453 | static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 0x0200); | |
454 | static SENSOR_DEVICE_ATTR_RO(in6_alarm, alarm, 0x0400); | |
455 | static SENSOR_DEVICE_ATTR_RO(in7_alarm, alarm, 0x0800); | |
59ac8367 | 456 | |
ce8c6ce1 JD |
457 | static struct attribute *smsc47m192_attributes[] = { |
458 | &sensor_dev_attr_in0_input.dev_attr.attr, | |
459 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
460 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
461 | &sensor_dev_attr_in0_alarm.dev_attr.attr, | |
462 | &sensor_dev_attr_in1_input.dev_attr.attr, | |
463 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
464 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
465 | &sensor_dev_attr_in1_alarm.dev_attr.attr, | |
466 | &sensor_dev_attr_in2_input.dev_attr.attr, | |
467 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
468 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
469 | &sensor_dev_attr_in2_alarm.dev_attr.attr, | |
470 | &sensor_dev_attr_in3_input.dev_attr.attr, | |
471 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
472 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
473 | &sensor_dev_attr_in3_alarm.dev_attr.attr, | |
474 | &sensor_dev_attr_in5_input.dev_attr.attr, | |
475 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
476 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
477 | &sensor_dev_attr_in5_alarm.dev_attr.attr, | |
478 | &sensor_dev_attr_in6_input.dev_attr.attr, | |
479 | &sensor_dev_attr_in6_min.dev_attr.attr, | |
480 | &sensor_dev_attr_in6_max.dev_attr.attr, | |
481 | &sensor_dev_attr_in6_alarm.dev_attr.attr, | |
482 | &sensor_dev_attr_in7_input.dev_attr.attr, | |
483 | &sensor_dev_attr_in7_min.dev_attr.attr, | |
484 | &sensor_dev_attr_in7_max.dev_attr.attr, | |
485 | &sensor_dev_attr_in7_alarm.dev_attr.attr, | |
486 | ||
487 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
488 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
489 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
490 | &sensor_dev_attr_temp1_offset.dev_attr.attr, | |
491 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, | |
492 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
493 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
494 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
495 | &sensor_dev_attr_temp2_offset.dev_attr.attr, | |
496 | &sensor_dev_attr_temp2_alarm.dev_attr.attr, | |
7817a39e | 497 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
ce8c6ce1 JD |
498 | &sensor_dev_attr_temp3_input.dev_attr.attr, |
499 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
500 | &sensor_dev_attr_temp3_min.dev_attr.attr, | |
501 | &sensor_dev_attr_temp3_offset.dev_attr.attr, | |
502 | &sensor_dev_attr_temp3_alarm.dev_attr.attr, | |
7817a39e | 503 | &sensor_dev_attr_temp3_fault.dev_attr.attr, |
ce8c6ce1 JD |
504 | |
505 | &dev_attr_cpu0_vid.attr, | |
506 | &dev_attr_vrm.attr, | |
507 | NULL | |
508 | }; | |
509 | ||
510 | static const struct attribute_group smsc47m192_group = { | |
511 | .attrs = smsc47m192_attributes, | |
512 | }; | |
513 | ||
514 | static struct attribute *smsc47m192_attributes_in4[] = { | |
515 | &sensor_dev_attr_in4_input.dev_attr.attr, | |
516 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
517 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
518 | &sensor_dev_attr_in4_alarm.dev_attr.attr, | |
519 | NULL | |
520 | }; | |
521 | ||
522 | static const struct attribute_group smsc47m192_group_in4 = { | |
523 | .attrs = smsc47m192_attributes_in4, | |
524 | }; | |
525 | ||
59ac8367 HR |
526 | static void smsc47m192_init_client(struct i2c_client *client) |
527 | { | |
528 | int i; | |
529 | u8 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG); | |
530 | u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); | |
531 | ||
532 | /* select cycle mode (pause 1 sec between updates) */ | |
533 | i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR, | |
534 | (sfr & 0xfd) | 0x02); | |
535 | if (!(config & 0x01)) { | |
536 | /* initialize alarm limits */ | |
7cc3cb66 | 537 | for (i = 0; i < 8; i++) { |
59ac8367 HR |
538 | i2c_smbus_write_byte_data(client, |
539 | SMSC47M192_REG_IN_MIN(i), 0); | |
540 | i2c_smbus_write_byte_data(client, | |
541 | SMSC47M192_REG_IN_MAX(i), 0xff); | |
542 | } | |
7cc3cb66 | 543 | for (i = 0; i < 3; i++) { |
59ac8367 HR |
544 | i2c_smbus_write_byte_data(client, |
545 | SMSC47M192_REG_TEMP_MIN[i], 0x80); | |
546 | i2c_smbus_write_byte_data(client, | |
547 | SMSC47M192_REG_TEMP_MAX[i], 0x7f); | |
548 | } | |
549 | ||
550 | /* start monitoring */ | |
551 | i2c_smbus_write_byte_data(client, SMSC47M192_REG_CONFIG, | |
552 | (config & 0xf7) | 0x01); | |
553 | } | |
554 | } | |
555 | ||
8fb597bb | 556 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
310ec792 | 557 | static int smsc47m192_detect(struct i2c_client *client, |
8fb597bb | 558 | struct i2c_board_info *info) |
59ac8367 | 559 | { |
8fb597bb JD |
560 | struct i2c_adapter *adapter = client->adapter; |
561 | int version; | |
59ac8367 HR |
562 | |
563 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
8fb597bb | 564 | return -ENODEV; |
59ac8367 HR |
565 | |
566 | /* Detection criteria from sensors_detect script */ | |
52df6440 JD |
567 | version = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VERSION); |
568 | if (i2c_smbus_read_byte_data(client, | |
59ac8367 | 569 | SMSC47M192_REG_COMPANY_ID) == 0x55 |
52df6440 JD |
570 | && (version & 0xf0) == 0x20 |
571 | && (i2c_smbus_read_byte_data(client, | |
59ac8367 | 572 | SMSC47M192_REG_VID) & 0x70) == 0x00 |
52df6440 | 573 | && (i2c_smbus_read_byte_data(client, |
59ac8367 | 574 | SMSC47M192_REG_VID4) & 0xfe) == 0x80) { |
52df6440 JD |
575 | dev_info(&adapter->dev, |
576 | "found SMSC47M192 or compatible, " | |
577 | "version 2, stepping A%d\n", version & 0x0f); | |
578 | } else { | |
579 | dev_dbg(&adapter->dev, | |
580 | "SMSC47M192 detection failed at 0x%02x\n", | |
581 | client->addr); | |
582 | return -ENODEV; | |
59ac8367 HR |
583 | } |
584 | ||
8fb597bb JD |
585 | strlcpy(info->type, "smsc47m192", I2C_NAME_SIZE); |
586 | ||
587 | return 0; | |
588 | } | |
589 | ||
590 | static int smsc47m192_probe(struct i2c_client *client, | |
591 | const struct i2c_device_id *id) | |
592 | { | |
166f7296 AL |
593 | struct device *dev = &client->dev; |
594 | struct device *hwmon_dev; | |
8fb597bb JD |
595 | struct smsc47m192_data *data; |
596 | int config; | |
8fb597bb | 597 | |
166f7296 | 598 | data = devm_kzalloc(dev, sizeof(struct smsc47m192_data), GFP_KERNEL); |
2625996b GR |
599 | if (!data) |
600 | return -ENOMEM; | |
8fb597bb | 601 | |
166f7296 | 602 | data->client = client; |
59ac8367 | 603 | data->vrm = vid_which_vrm(); |
e4a7167f | 604 | mutex_init(&data->update_lock); |
59ac8367 | 605 | |
59ac8367 HR |
606 | /* Initialize the SMSC47M192 chip */ |
607 | smsc47m192_init_client(client); | |
608 | ||
166f7296 AL |
609 | /* sysfs hooks */ |
610 | data->groups[0] = &smsc47m192_group; | |
59ac8367 HR |
611 | /* Pin 110 is either in4 (+12V) or VID4 */ |
612 | config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG); | |
166f7296 AL |
613 | if (!(config & 0x20)) |
614 | data->groups[1] = &smsc47m192_group_in4; | |
59ac8367 | 615 | |
166f7296 AL |
616 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
617 | data, data->groups); | |
618 | return PTR_ERR_OR_ZERO(hwmon_dev); | |
59ac8367 HR |
619 | } |
620 | ||
94314e25 AL |
621 | static const struct i2c_device_id smsc47m192_id[] = { |
622 | { "smsc47m192", 0 }, | |
623 | { } | |
624 | }; | |
625 | MODULE_DEVICE_TABLE(i2c, smsc47m192_id); | |
59ac8367 | 626 | |
94314e25 AL |
627 | static struct i2c_driver smsc47m192_driver = { |
628 | .class = I2C_CLASS_HWMON, | |
629 | .driver = { | |
630 | .name = "smsc47m192", | |
631 | }, | |
632 | .probe = smsc47m192_probe, | |
94314e25 AL |
633 | .id_table = smsc47m192_id, |
634 | .detect = smsc47m192_detect, | |
635 | .address_list = normal_i2c, | |
636 | }; | |
59ac8367 | 637 | |
f0967eea | 638 | module_i2c_driver(smsc47m192_driver); |
59ac8367 HR |
639 | |
640 | MODULE_AUTHOR("Hartmut Rick <linux@rick.claranet.de>"); | |
641 | MODULE_DESCRIPTION("SMSC47M192 driver"); | |
642 | MODULE_LICENSE("GPL"); |