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include: replace linux/module.h with "struct module" wherever possible
[linux-2.6/next.git] / drivers / hwmon / smsc47m192.c
blob40b26673d87f3563946dd34a8cac909b31ddfdaa
1 /*
2 smsc47m192.c - Support for hardware monitoring block of
3 SMSC LPC47M192 and compatible Super I/O chips
4
5 Copyright (C) 2006 Hartmut Rick <linux@rick.claranet.de>
6
7 Derived from lm78.c and other chip drivers.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24 #include <linux/module.h>
25 #include <linux/init.h>
26 #include <linux/slab.h>
27 #include <linux/jiffies.h>
28 #include <linux/i2c.h>
29 #include <linux/hwmon.h>
30 #include <linux/hwmon-sysfs.h>
31 #include <linux/hwmon-vid.h>
32 #include <linux/err.h>
33 #include <linux/sysfs.h>
34 #include <linux/mutex.h>
35
36 /* Addresses to scan */
37 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
38
39 /* SMSC47M192 registers */
40 #define SMSC47M192_REG_IN(nr) ((nr)<6 ? (0x20 + (nr)) : \
41 (0x50 + (nr) - 6))
42 #define SMSC47M192_REG_IN_MAX(nr) ((nr)<6 ? (0x2b + (nr) * 2) : \
43 (0x54 + (((nr) - 6) * 2)))
44 #define SMSC47M192_REG_IN_MIN(nr) ((nr)<6 ? (0x2c + (nr) * 2) : \
45 (0x55 + (((nr) - 6) * 2)))
46 static u8 SMSC47M192_REG_TEMP[3] = { 0x27, 0x26, 0x52 };
47 static u8 SMSC47M192_REG_TEMP_MAX[3] = { 0x39, 0x37, 0x58 };
48 static u8 SMSC47M192_REG_TEMP_MIN[3] = { 0x3A, 0x38, 0x59 };
49 #define SMSC47M192_REG_TEMP_OFFSET(nr) ((nr)==2 ? 0x1e : 0x1f)
50 #define SMSC47M192_REG_ALARM1 0x41
51 #define SMSC47M192_REG_ALARM2 0x42
52 #define SMSC47M192_REG_VID 0x47
53 #define SMSC47M192_REG_VID4 0x49
54 #define SMSC47M192_REG_CONFIG 0x40
55 #define SMSC47M192_REG_SFR 0x4f
56 #define SMSC47M192_REG_COMPANY_ID 0x3e
57 #define SMSC47M192_REG_VERSION 0x3f
58
59 /* generalised scaling with integer rounding */
60 static inline int SCALE(long val, int mul, int div)
61 {
62 if (val < 0)
63 return (val * mul - div / 2) / div;
64 else
65 return (val * mul + div / 2) / div;
66 }
67
68 /* Conversions */
69
70 /* smsc47m192 internally scales voltage measurements */
71 static const u16 nom_mv[] = { 2500, 2250, 3300, 5000, 12000, 3300, 1500, 1800 };
72
73 static inline unsigned int IN_FROM_REG(u8 reg, int n)
74 {
75 return SCALE(reg, nom_mv[n], 192);
76 }
77
78 static inline u8 IN_TO_REG(unsigned long val, int n)
79 {
80 return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255);
81 }
82
83 /* TEMP: 0.001 degC units (-128C to +127C)
84 REG: 1C/bit, two's complement */
85 static inline s8 TEMP_TO_REG(int val)
86 {
87 return SENSORS_LIMIT(SCALE(val, 1, 1000), -128000, 127000);
88 }
89
90 static inline int TEMP_FROM_REG(s8 val)
91 {
92 return val * 1000;
93 }
94
95 struct smsc47m192_data {
96 struct device *hwmon_dev;
97 struct mutex update_lock;
98 char valid; /* !=0 if following fields are valid */
99 unsigned long last_updated; /* In jiffies */
100
101 u8 in[8]; /* Register value */
102 u8 in_max[8]; /* Register value */
103 u8 in_min[8]; /* Register value */
104 s8 temp[3]; /* Register value */
105 s8 temp_max[3]; /* Register value */
106 s8 temp_min[3]; /* Register value */
107 s8 temp_offset[3]; /* Register value */
108 u16 alarms; /* Register encoding, combined */
109 u8 vid; /* Register encoding, combined */
110 u8 vrm;
111 };
112
113 static int smsc47m192_probe(struct i2c_client *client,
114 const struct i2c_device_id *id);
115 static int smsc47m192_detect(struct i2c_client *client,
116 struct i2c_board_info *info);
117 static int smsc47m192_remove(struct i2c_client *client);
118 static struct smsc47m192_data *smsc47m192_update_device(struct device *dev);
119
120 static const struct i2c_device_id smsc47m192_id[] = {
121 { "smsc47m192", 0 },
122 { }
123 };
124 MODULE_DEVICE_TABLE(i2c, smsc47m192_id);
125
126 static struct i2c_driver smsc47m192_driver = {
127 .class = I2C_CLASS_HWMON,
128 .driver = {
129 .name = "smsc47m192",
130 },
131 .probe = smsc47m192_probe,
132 .remove = smsc47m192_remove,
133 .id_table = smsc47m192_id,
134 .detect = smsc47m192_detect,
135 .address_list = normal_i2c,
136 };
137
138 /* Voltages */
139 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
140 char *buf)
141 {
142 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
143 int nr = sensor_attr->index;
144 struct smsc47m192_data *data = smsc47m192_update_device(dev);
145 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr));
146 }
147
148 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
149 char *buf)
150 {
151 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
152 int nr = sensor_attr->index;
153 struct smsc47m192_data *data = smsc47m192_update_device(dev);
154 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr));
155 }
156
157 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
158 char *buf)
159 {
160 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
161 int nr = sensor_attr->index;
162 struct smsc47m192_data *data = smsc47m192_update_device(dev);
163 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr));
164 }
165
166 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
167 const char *buf, size_t count)
168 {
169 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
170 int nr = sensor_attr->index;
171 struct i2c_client *client = to_i2c_client(dev);
172 struct smsc47m192_data *data = i2c_get_clientdata(client);
173 unsigned long val = simple_strtoul(buf, NULL, 10);
174
175 mutex_lock(&data->update_lock);
176 data->in_min[nr] = IN_TO_REG(val, nr);
177 i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MIN(nr),
178 data->in_min[nr]);
179 mutex_unlock(&data->update_lock);
180 return count;
181 }
182
183 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
184 const char *buf, size_t count)
185 {
186 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
187 int nr = sensor_attr->index;
188 struct i2c_client *client = to_i2c_client(dev);
189 struct smsc47m192_data *data = i2c_get_clientdata(client);
190 unsigned long val = simple_strtoul(buf, NULL, 10);
191
192 mutex_lock(&data->update_lock);
193 data->in_max[nr] = IN_TO_REG(val, nr);
194 i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MAX(nr),
195 data->in_max[nr]);
196 mutex_unlock(&data->update_lock);
197 return count;
198 }
199
200 #define show_in_offset(offset) \
201 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
202 show_in, NULL, offset); \
203 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
204 show_in_min, set_in_min, offset); \
205 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
206 show_in_max, set_in_max, offset);
207
208 show_in_offset(0)
209 show_in_offset(1)
210 show_in_offset(2)
211 show_in_offset(3)
212 show_in_offset(4)
213 show_in_offset(5)
214 show_in_offset(6)
215 show_in_offset(7)
216
217 /* Temperatures */
218 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
219 char *buf)
220 {
221 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
222 int nr = sensor_attr->index;
223 struct smsc47m192_data *data = smsc47m192_update_device(dev);
224 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
225 }
226
227 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
228 char *buf)
229 {
230 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
231 int nr = sensor_attr->index;
232 struct smsc47m192_data *data = smsc47m192_update_device(dev);
233 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
234 }
235
236 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
237 char *buf)
238 {
239 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
240 int nr = sensor_attr->index;
241 struct smsc47m192_data *data = smsc47m192_update_device(dev);
242 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
243 }
244
245 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
246 const char *buf, size_t count)
247 {
248 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
249 int nr = sensor_attr->index;
250 struct i2c_client *client = to_i2c_client(dev);
251 struct smsc47m192_data *data = i2c_get_clientdata(client);
252 long val = simple_strtol(buf, NULL, 10);
253
254 mutex_lock(&data->update_lock);
255 data->temp_min[nr] = TEMP_TO_REG(val);
256 i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MIN[nr],
257 data->temp_min[nr]);
258 mutex_unlock(&data->update_lock);
259 return count;
260 }
261
262 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
263 const char *buf, size_t count)
264 {
265 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
266 int nr = sensor_attr->index;
267 struct i2c_client *client = to_i2c_client(dev);
268 struct smsc47m192_data *data = i2c_get_clientdata(client);
269 long val = simple_strtol(buf, NULL, 10);
270
271 mutex_lock(&data->update_lock);
272 data->temp_max[nr] = TEMP_TO_REG(val);
273 i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MAX[nr],
274 data->temp_max[nr]);
275 mutex_unlock(&data->update_lock);
276 return count;
277 }
278
279 static ssize_t show_temp_offset(struct device *dev, struct device_attribute
280 *attr, char *buf)
281 {
282 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
283 int nr = sensor_attr->index;
284 struct smsc47m192_data *data = smsc47m192_update_device(dev);
285 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_offset[nr]));
286 }
287
288 static ssize_t set_temp_offset(struct device *dev, struct device_attribute
289 *attr, const char *buf, size_t count)
290 {
291 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
292 int nr = sensor_attr->index;
293 struct i2c_client *client = to_i2c_client(dev);
294 struct smsc47m192_data *data = i2c_get_clientdata(client);
295 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
296 long val = simple_strtol(buf, NULL, 10);
297
298 mutex_lock(&data->update_lock);
299 data->temp_offset[nr] = TEMP_TO_REG(val);
300 if (nr>1)
301 i2c_smbus_write_byte_data(client,
302 SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]);
303 else if (data->temp_offset[nr] != 0) {
304 /* offset[0] and offset[1] share the same register,
305 SFR bit 4 activates offset[0] */
306 i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR,
307 (sfr & 0xef) | (nr==0 ? 0x10 : 0));
308 data->temp_offset[1-nr] = 0;
309 i2c_smbus_write_byte_data(client,
310 SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]);
311 } else if ((sfr & 0x10) == (nr==0 ? 0x10 : 0))
312 i2c_smbus_write_byte_data(client,
313 SMSC47M192_REG_TEMP_OFFSET(nr), 0);
314 mutex_unlock(&data->update_lock);
315 return count;
316 }
317
318 #define show_temp_index(index) \
319 static SENSOR_DEVICE_ATTR(temp##index##_input, S_IRUGO, \
320 show_temp, NULL, index-1); \
321 static SENSOR_DEVICE_ATTR(temp##index##_min, S_IRUGO | S_IWUSR, \
322 show_temp_min, set_temp_min, index-1); \
323 static SENSOR_DEVICE_ATTR(temp##index##_max, S_IRUGO | S_IWUSR, \
324 show_temp_max, set_temp_max, index-1); \
325 static SENSOR_DEVICE_ATTR(temp##index##_offset, S_IRUGO | S_IWUSR, \
326 show_temp_offset, set_temp_offset, index-1);
327
328 show_temp_index(1)
329 show_temp_index(2)
330 show_temp_index(3)
331
332 /* VID */
333 static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
334 char *buf)
335 {
336 struct smsc47m192_data *data = smsc47m192_update_device(dev);
337 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
338 }
339 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
340
341 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
342 char *buf)
343 {
344 struct smsc47m192_data *data = dev_get_drvdata(dev);
345 return sprintf(buf, "%d\n", data->vrm);
346 }
347
348 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
349 const char *buf, size_t count)
350 {
351 struct smsc47m192_data *data = dev_get_drvdata(dev);
352 data->vrm = simple_strtoul(buf, NULL, 10);
353 return count;
354 }
355 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
356
357 /* Alarms */
358 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
359 char *buf)
360 {
361 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
362 int nr = sensor_attr->index;
363 struct smsc47m192_data *data = smsc47m192_update_device(dev);
364 return sprintf(buf, "%u\n", (data->alarms & nr) ? 1 : 0);
365 }
366
367 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0x0010);
368 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 0x0020);
369 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0x0040);
370 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 0x4000);
371 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 0x8000);
372 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0x0001);
373 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0x0002);
374 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 0x0004);
375 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 0x0008);
376 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 0x0100);
377 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 0x0200);
378 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 0x0400);
379 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 0x0800);
380
381 static struct attribute *smsc47m192_attributes[] = {
382 &sensor_dev_attr_in0_input.dev_attr.attr,
383 &sensor_dev_attr_in0_min.dev_attr.attr,
384 &sensor_dev_attr_in0_max.dev_attr.attr,
385 &sensor_dev_attr_in0_alarm.dev_attr.attr,
386 &sensor_dev_attr_in1_input.dev_attr.attr,
387 &sensor_dev_attr_in1_min.dev_attr.attr,
388 &sensor_dev_attr_in1_max.dev_attr.attr,
389 &sensor_dev_attr_in1_alarm.dev_attr.attr,
390 &sensor_dev_attr_in2_input.dev_attr.attr,
391 &sensor_dev_attr_in2_min.dev_attr.attr,
392 &sensor_dev_attr_in2_max.dev_attr.attr,
393 &sensor_dev_attr_in2_alarm.dev_attr.attr,
394 &sensor_dev_attr_in3_input.dev_attr.attr,
395 &sensor_dev_attr_in3_min.dev_attr.attr,
396 &sensor_dev_attr_in3_max.dev_attr.attr,
397 &sensor_dev_attr_in3_alarm.dev_attr.attr,
398 &sensor_dev_attr_in5_input.dev_attr.attr,
399 &sensor_dev_attr_in5_min.dev_attr.attr,
400 &sensor_dev_attr_in5_max.dev_attr.attr,
401 &sensor_dev_attr_in5_alarm.dev_attr.attr,
402 &sensor_dev_attr_in6_input.dev_attr.attr,
403 &sensor_dev_attr_in6_min.dev_attr.attr,
404 &sensor_dev_attr_in6_max.dev_attr.attr,
405 &sensor_dev_attr_in6_alarm.dev_attr.attr,
406 &sensor_dev_attr_in7_input.dev_attr.attr,
407 &sensor_dev_attr_in7_min.dev_attr.attr,
408 &sensor_dev_attr_in7_max.dev_attr.attr,
409 &sensor_dev_attr_in7_alarm.dev_attr.attr,
410
411 &sensor_dev_attr_temp1_input.dev_attr.attr,
412 &sensor_dev_attr_temp1_max.dev_attr.attr,
413 &sensor_dev_attr_temp1_min.dev_attr.attr,
414 &sensor_dev_attr_temp1_offset.dev_attr.attr,
415 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
416 &sensor_dev_attr_temp2_input.dev_attr.attr,
417 &sensor_dev_attr_temp2_max.dev_attr.attr,
418 &sensor_dev_attr_temp2_min.dev_attr.attr,
419 &sensor_dev_attr_temp2_offset.dev_attr.attr,
420 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
421 &sensor_dev_attr_temp2_fault.dev_attr.attr,
422 &sensor_dev_attr_temp3_input.dev_attr.attr,
423 &sensor_dev_attr_temp3_max.dev_attr.attr,
424 &sensor_dev_attr_temp3_min.dev_attr.attr,
425 &sensor_dev_attr_temp3_offset.dev_attr.attr,
426 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
427 &sensor_dev_attr_temp3_fault.dev_attr.attr,
428
429 &dev_attr_cpu0_vid.attr,
430 &dev_attr_vrm.attr,
431 NULL
432 };
433
434 static const struct attribute_group smsc47m192_group = {
435 .attrs = smsc47m192_attributes,
436 };
437
438 static struct attribute *smsc47m192_attributes_in4[] = {
439 &sensor_dev_attr_in4_input.dev_attr.attr,
440 &sensor_dev_attr_in4_min.dev_attr.attr,
441 &sensor_dev_attr_in4_max.dev_attr.attr,
442 &sensor_dev_attr_in4_alarm.dev_attr.attr,
443 NULL
444 };
445
446 static const struct attribute_group smsc47m192_group_in4 = {
447 .attrs = smsc47m192_attributes_in4,
448 };
449
450 static void smsc47m192_init_client(struct i2c_client *client)
451 {
452 int i;
453 u8 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG);
454 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
455
456 /* select cycle mode (pause 1 sec between updates) */
457 i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR,
458 (sfr & 0xfd) | 0x02);
459 if (!(config & 0x01)) {
460 /* initialize alarm limits */
461 for (i=0; i<8; i++) {
462 i2c_smbus_write_byte_data(client,
463 SMSC47M192_REG_IN_MIN(i), 0);
464 i2c_smbus_write_byte_data(client,
465 SMSC47M192_REG_IN_MAX(i), 0xff);
466 }
467 for (i=0; i<3; i++) {
468 i2c_smbus_write_byte_data(client,
469 SMSC47M192_REG_TEMP_MIN[i], 0x80);
470 i2c_smbus_write_byte_data(client,
471 SMSC47M192_REG_TEMP_MAX[i], 0x7f);
472 }
473
474 /* start monitoring */
475 i2c_smbus_write_byte_data(client, SMSC47M192_REG_CONFIG,
476 (config & 0xf7) | 0x01);
477 }
478 }
479
480 /* Return 0 if detection is successful, -ENODEV otherwise */
481 static int smsc47m192_detect(struct i2c_client *client,
482 struct i2c_board_info *info)
483 {
484 struct i2c_adapter *adapter = client->adapter;
485 int version;
486
487 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
488 return -ENODEV;
489
490 /* Detection criteria from sensors_detect script */
491 version = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VERSION);
492 if (i2c_smbus_read_byte_data(client,
493 SMSC47M192_REG_COMPANY_ID) == 0x55
494 && (version & 0xf0) == 0x20
495 && (i2c_smbus_read_byte_data(client,
496 SMSC47M192_REG_VID) & 0x70) == 0x00
497 && (i2c_smbus_read_byte_data(client,
498 SMSC47M192_REG_VID4) & 0xfe) == 0x80) {
499 dev_info(&adapter->dev,
500 "found SMSC47M192 or compatible, "
501 "version 2, stepping A%d\n", version & 0x0f);
502 } else {
503 dev_dbg(&adapter->dev,
504 "SMSC47M192 detection failed at 0x%02x\n",
505 client->addr);
506 return -ENODEV;
507 }
508
509 strlcpy(info->type, "smsc47m192", I2C_NAME_SIZE);
510
511 return 0;
512 }
513
514 static int smsc47m192_probe(struct i2c_client *client,
515 const struct i2c_device_id *id)
516 {
517 struct smsc47m192_data *data;
518 int config;
519 int err;
520
521 data = kzalloc(sizeof(struct smsc47m192_data), GFP_KERNEL);
522 if (!data) {
523 err = -ENOMEM;
524 goto exit;
525 }
526
527 i2c_set_clientdata(client, data);
528 data->vrm = vid_which_vrm();
529 mutex_init(&data->update_lock);
530
531 /* Initialize the SMSC47M192 chip */
532 smsc47m192_init_client(client);
533
534 /* Register sysfs hooks */
535 if ((err = sysfs_create_group(&client->dev.kobj, &smsc47m192_group)))
536 goto exit_free;
537
538 /* Pin 110 is either in4 (+12V) or VID4 */
539 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG);
540 if (!(config & 0x20)) {
541 if ((err = sysfs_create_group(&client->dev.kobj,
542 &smsc47m192_group_in4)))
543 goto exit_remove_files;
544 }
545
546 data->hwmon_dev = hwmon_device_register(&client->dev);
547 if (IS_ERR(data->hwmon_dev)) {
548 err = PTR_ERR(data->hwmon_dev);
549 goto exit_remove_files;
550 }
551
552 return 0;
553
554 exit_remove_files:
555 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group);
556 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4);
557 exit_free:
558 kfree(data);
559 exit:
560 return err;
561 }
562
563 static int smsc47m192_remove(struct i2c_client *client)
564 {
565 struct smsc47m192_data *data = i2c_get_clientdata(client);
566
567 hwmon_device_unregister(data->hwmon_dev);
568 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group);
569 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4);
570
571 kfree(data);
572
573 return 0;
574 }
575
576 static struct smsc47m192_data *smsc47m192_update_device(struct device *dev)
577 {
578 struct i2c_client *client = to_i2c_client(dev);
579 struct smsc47m192_data *data = i2c_get_clientdata(client);
580 int i, config;
581
582 mutex_lock(&data->update_lock);
583
584 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
585 || !data->valid) {
586 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
587
588 dev_dbg(&client->dev, "Starting smsc47m192 update\n");
589
590 for (i = 0; i <= 7; i++) {
591 data->in[i] = i2c_smbus_read_byte_data(client,
592 SMSC47M192_REG_IN(i));
593 data->in_min[i] = i2c_smbus_read_byte_data(client,
594 SMSC47M192_REG_IN_MIN(i));
595 data->in_max[i] = i2c_smbus_read_byte_data(client,
596 SMSC47M192_REG_IN_MAX(i));
597 }
598 for (i = 0; i < 3; i++) {
599 data->temp[i] = i2c_smbus_read_byte_data(client,
600 SMSC47M192_REG_TEMP[i]);
601 data->temp_max[i] = i2c_smbus_read_byte_data(client,
602 SMSC47M192_REG_TEMP_MAX[i]);
603 data->temp_min[i] = i2c_smbus_read_byte_data(client,
604 SMSC47M192_REG_TEMP_MIN[i]);
605 }
606 for (i = 1; i < 3; i++)
607 data->temp_offset[i] = i2c_smbus_read_byte_data(client,
608 SMSC47M192_REG_TEMP_OFFSET(i));
609 /* first offset is temp_offset[0] if SFR bit 4 is set,
610 temp_offset[1] otherwise */
611 if (sfr & 0x10) {
612 data->temp_offset[0] = data->temp_offset[1];
613 data->temp_offset[1] = 0;
614 } else
615 data->temp_offset[0] = 0;
616
617 data->vid = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VID)
618 & 0x0f;
619 config = i2c_smbus_read_byte_data(client,
620 SMSC47M192_REG_CONFIG);
621 if (config & 0x20)
622 data->vid |= (i2c_smbus_read_byte_data(client,
623 SMSC47M192_REG_VID4) & 0x01) << 4;
624 data->alarms = i2c_smbus_read_byte_data(client,
625 SMSC47M192_REG_ALARM1) |
626 (i2c_smbus_read_byte_data(client,
627 SMSC47M192_REG_ALARM2) << 8);
628
629 data->last_updated = jiffies;
630 data->valid = 1;
631 }
632
633 mutex_unlock(&data->update_lock);
634
635 return data;
636 }
637
638 static int __init smsc47m192_init(void)
639 {
640 return i2c_add_driver(&smsc47m192_driver);
641 }
642
643 static void __exit smsc47m192_exit(void)
644 {
645 i2c_del_driver(&smsc47m192_driver);
646 }
647
648 MODULE_AUTHOR("Hartmut Rick <linux@rick.claranet.de>");
649 MODULE_DESCRIPTION("SMSC47M192 driver");
650 MODULE_LICENSE("GPL");
651
652 module_init(smsc47m192_init);
653 module_exit(smsc47m192_exit);
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