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[ARM] pxa: Gumstix Verdex PCMCIA support
[linux-2.6/verdex.git] / drivers / hwmon / smsc47m192.c
blob8bb5cb532d4d8c121595298729f7b85c03ed3d50
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 /* Insmod parameters */
40 I2C_CLIENT_INSMOD_1(smsc47m192);
41
42 /* SMSC47M192 registers */
43 #define SMSC47M192_REG_IN(nr) ((nr)<6 ? (0x20 + (nr)) : \
44 (0x50 + (nr) - 6))
45 #define SMSC47M192_REG_IN_MAX(nr) ((nr)<6 ? (0x2b + (nr) * 2) : \
46 (0x54 + (((nr) - 6) * 2)))
47 #define SMSC47M192_REG_IN_MIN(nr) ((nr)<6 ? (0x2c + (nr) * 2) : \
48 (0x55 + (((nr) - 6) * 2)))
49 static u8 SMSC47M192_REG_TEMP[3] = { 0x27, 0x26, 0x52 };
50 static u8 SMSC47M192_REG_TEMP_MAX[3] = { 0x39, 0x37, 0x58 };
51 static u8 SMSC47M192_REG_TEMP_MIN[3] = { 0x3A, 0x38, 0x59 };
52 #define SMSC47M192_REG_TEMP_OFFSET(nr) ((nr)==2 ? 0x1e : 0x1f)
53 #define SMSC47M192_REG_ALARM1 0x41
54 #define SMSC47M192_REG_ALARM2 0x42
55 #define SMSC47M192_REG_VID 0x47
56 #define SMSC47M192_REG_VID4 0x49
57 #define SMSC47M192_REG_CONFIG 0x40
58 #define SMSC47M192_REG_SFR 0x4f
59 #define SMSC47M192_REG_COMPANY_ID 0x3e
60 #define SMSC47M192_REG_VERSION 0x3f
61
62 /* generalised scaling with integer rounding */
63 static inline int SCALE(long val, int mul, int div)
64 {
65 if (val < 0)
66 return (val * mul - div / 2) / div;
67 else
68 return (val * mul + div / 2) / div;
69 }
70
71 /* Conversions */
72
73 /* smsc47m192 internally scales voltage measurements */
74 static const u16 nom_mv[] = { 2500, 2250, 3300, 5000, 12000, 3300, 1500, 1800 };
75
76 static inline unsigned int IN_FROM_REG(u8 reg, int n)
77 {
78 return SCALE(reg, nom_mv[n], 192);
79 }
80
81 static inline u8 IN_TO_REG(unsigned long val, int n)
82 {
83 return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255);
84 }
85
86 /* TEMP: 0.001 degC units (-128C to +127C)
87 REG: 1C/bit, two's complement */
88 static inline s8 TEMP_TO_REG(int val)
89 {
90 return SENSORS_LIMIT(SCALE(val, 1, 1000), -128000, 127000);
91 }
92
93 static inline int TEMP_FROM_REG(s8 val)
94 {
95 return val * 1000;
96 }
97
98 struct smsc47m192_data {
99 struct device *hwmon_dev;
100 struct mutex update_lock;
101 char valid; /* !=0 if following fields are valid */
102 unsigned long last_updated; /* In jiffies */
103
104 u8 in[8]; /* Register value */
105 u8 in_max[8]; /* Register value */
106 u8 in_min[8]; /* Register value */
107 s8 temp[3]; /* Register value */
108 s8 temp_max[3]; /* Register value */
109 s8 temp_min[3]; /* Register value */
110 s8 temp_offset[3]; /* Register value */
111 u16 alarms; /* Register encoding, combined */
112 u8 vid; /* Register encoding, combined */
113 u8 vrm;
114 };
115
116 static int smsc47m192_probe(struct i2c_client *client,
117 const struct i2c_device_id *id);
118 static int smsc47m192_detect(struct i2c_client *client, int kind,
119 struct i2c_board_info *info);
120 static int smsc47m192_remove(struct i2c_client *client);
121 static struct smsc47m192_data *smsc47m192_update_device(struct device *dev);
122
123 static const struct i2c_device_id smsc47m192_id[] = {
124 { "smsc47m192", smsc47m192 },
125 { }
126 };
127 MODULE_DEVICE_TABLE(i2c, smsc47m192_id);
128
129 static struct i2c_driver smsc47m192_driver = {
130 .class = I2C_CLASS_HWMON,
131 .driver = {
132 .name = "smsc47m192",
133 },
134 .probe = smsc47m192_probe,
135 .remove = smsc47m192_remove,
136 .id_table = smsc47m192_id,
137 .detect = smsc47m192_detect,
138 .address_data = &addr_data,
139 };
140
141 /* Voltages */
142 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
143 char *buf)
144 {
145 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
146 int nr = sensor_attr->index;
147 struct smsc47m192_data *data = smsc47m192_update_device(dev);
148 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr));
149 }
150
151 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
152 char *buf)
153 {
154 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
155 int nr = sensor_attr->index;
156 struct smsc47m192_data *data = smsc47m192_update_device(dev);
157 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr));
158 }
159
160 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
161 char *buf)
162 {
163 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
164 int nr = sensor_attr->index;
165 struct smsc47m192_data *data = smsc47m192_update_device(dev);
166 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr));
167 }
168
169 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
170 const char *buf, size_t count)
171 {
172 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
173 int nr = sensor_attr->index;
174 struct i2c_client *client = to_i2c_client(dev);
175 struct smsc47m192_data *data = i2c_get_clientdata(client);
176 unsigned long val = simple_strtoul(buf, NULL, 10);
177
178 mutex_lock(&data->update_lock);
179 data->in_min[nr] = IN_TO_REG(val, nr);
180 i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MIN(nr),
181 data->in_min[nr]);
182 mutex_unlock(&data->update_lock);
183 return count;
184 }
185
186 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
187 const char *buf, size_t count)
188 {
189 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
190 int nr = sensor_attr->index;
191 struct i2c_client *client = to_i2c_client(dev);
192 struct smsc47m192_data *data = i2c_get_clientdata(client);
193 unsigned long val = simple_strtoul(buf, NULL, 10);
194
195 mutex_lock(&data->update_lock);
196 data->in_max[nr] = IN_TO_REG(val, nr);
197 i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MAX(nr),
198 data->in_max[nr]);
199 mutex_unlock(&data->update_lock);
200 return count;
201 }
202
203 #define show_in_offset(offset) \
204 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
205 show_in, NULL, offset); \
206 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
207 show_in_min, set_in_min, offset); \
208 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
209 show_in_max, set_in_max, offset);
210
211 show_in_offset(0)
212 show_in_offset(1)
213 show_in_offset(2)
214 show_in_offset(3)
215 show_in_offset(4)
216 show_in_offset(5)
217 show_in_offset(6)
218 show_in_offset(7)
219
220 /* Temperatures */
221 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
222 char *buf)
223 {
224 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
225 int nr = sensor_attr->index;
226 struct smsc47m192_data *data = smsc47m192_update_device(dev);
227 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
228 }
229
230 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
231 char *buf)
232 {
233 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
234 int nr = sensor_attr->index;
235 struct smsc47m192_data *data = smsc47m192_update_device(dev);
236 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
237 }
238
239 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
240 char *buf)
241 {
242 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
243 int nr = sensor_attr->index;
244 struct smsc47m192_data *data = smsc47m192_update_device(dev);
245 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
246 }
247
248 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
249 const char *buf, size_t count)
250 {
251 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
252 int nr = sensor_attr->index;
253 struct i2c_client *client = to_i2c_client(dev);
254 struct smsc47m192_data *data = i2c_get_clientdata(client);
255 long val = simple_strtol(buf, NULL, 10);
256
257 mutex_lock(&data->update_lock);
258 data->temp_min[nr] = TEMP_TO_REG(val);
259 i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MIN[nr],
260 data->temp_min[nr]);
261 mutex_unlock(&data->update_lock);
262 return count;
263 }
264
265 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
266 const char *buf, size_t count)
267 {
268 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
269 int nr = sensor_attr->index;
270 struct i2c_client *client = to_i2c_client(dev);
271 struct smsc47m192_data *data = i2c_get_clientdata(client);
272 long val = simple_strtol(buf, NULL, 10);
273
274 mutex_lock(&data->update_lock);
275 data->temp_max[nr] = TEMP_TO_REG(val);
276 i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MAX[nr],
277 data->temp_max[nr]);
278 mutex_unlock(&data->update_lock);
279 return count;
280 }
281
282 static ssize_t show_temp_offset(struct device *dev, struct device_attribute
283 *attr, char *buf)
284 {
285 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
286 int nr = sensor_attr->index;
287 struct smsc47m192_data *data = smsc47m192_update_device(dev);
288 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_offset[nr]));
289 }
290
291 static ssize_t set_temp_offset(struct device *dev, struct device_attribute
292 *attr, const char *buf, size_t count)
293 {
294 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
295 int nr = sensor_attr->index;
296 struct i2c_client *client = to_i2c_client(dev);
297 struct smsc47m192_data *data = i2c_get_clientdata(client);
298 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
299 long val = simple_strtol(buf, NULL, 10);
300
301 mutex_lock(&data->update_lock);
302 data->temp_offset[nr] = TEMP_TO_REG(val);
303 if (nr>1)
304 i2c_smbus_write_byte_data(client,
305 SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]);
306 else if (data->temp_offset[nr] != 0) {
307 /* offset[0] and offset[1] share the same register,
308 SFR bit 4 activates offset[0] */
309 i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR,
310 (sfr & 0xef) | (nr==0 ? 0x10 : 0));
311 data->temp_offset[1-nr] = 0;
312 i2c_smbus_write_byte_data(client,
313 SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]);
314 } else if ((sfr & 0x10) == (nr==0 ? 0x10 : 0))
315 i2c_smbus_write_byte_data(client,
316 SMSC47M192_REG_TEMP_OFFSET(nr), 0);
317 mutex_unlock(&data->update_lock);
318 return count;
319 }
320
321 #define show_temp_index(index) \
322 static SENSOR_DEVICE_ATTR(temp##index##_input, S_IRUGO, \
323 show_temp, NULL, index-1); \
324 static SENSOR_DEVICE_ATTR(temp##index##_min, S_IRUGO | S_IWUSR, \
325 show_temp_min, set_temp_min, index-1); \
326 static SENSOR_DEVICE_ATTR(temp##index##_max, S_IRUGO | S_IWUSR, \
327 show_temp_max, set_temp_max, index-1); \
328 static SENSOR_DEVICE_ATTR(temp##index##_offset, S_IRUGO | S_IWUSR, \
329 show_temp_offset, set_temp_offset, index-1);
330
331 show_temp_index(1)
332 show_temp_index(2)
333 show_temp_index(3)
334
335 /* VID */
336 static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
337 char *buf)
338 {
339 struct smsc47m192_data *data = smsc47m192_update_device(dev);
340 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
341 }
342 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
343
344 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
345 char *buf)
346 {
347 struct smsc47m192_data *data = dev_get_drvdata(dev);
348 return sprintf(buf, "%d\n", data->vrm);
349 }
350
351 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
352 const char *buf, size_t count)
353 {
354 struct smsc47m192_data *data = dev_get_drvdata(dev);
355 data->vrm = simple_strtoul(buf, NULL, 10);
356 return count;
357 }
358 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
359
360 /* Alarms */
361 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
362 char *buf)
363 {
364 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
365 int nr = sensor_attr->index;
366 struct smsc47m192_data *data = smsc47m192_update_device(dev);
367 return sprintf(buf, "%u\n", (data->alarms & nr) ? 1 : 0);
368 }
369
370 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0x0010);
371 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 0x0020);
372 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0x0040);
373 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 0x4000);
374 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 0x8000);
375 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0x0001);
376 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0x0002);
377 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 0x0004);
378 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 0x0008);
379 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 0x0100);
380 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 0x0200);
381 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 0x0400);
382 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 0x0800);
383
384 static struct attribute *smsc47m192_attributes[] = {
385 &sensor_dev_attr_in0_input.dev_attr.attr,
386 &sensor_dev_attr_in0_min.dev_attr.attr,
387 &sensor_dev_attr_in0_max.dev_attr.attr,
388 &sensor_dev_attr_in0_alarm.dev_attr.attr,
389 &sensor_dev_attr_in1_input.dev_attr.attr,
390 &sensor_dev_attr_in1_min.dev_attr.attr,
391 &sensor_dev_attr_in1_max.dev_attr.attr,
392 &sensor_dev_attr_in1_alarm.dev_attr.attr,
393 &sensor_dev_attr_in2_input.dev_attr.attr,
394 &sensor_dev_attr_in2_min.dev_attr.attr,
395 &sensor_dev_attr_in2_max.dev_attr.attr,
396 &sensor_dev_attr_in2_alarm.dev_attr.attr,
397 &sensor_dev_attr_in3_input.dev_attr.attr,
398 &sensor_dev_attr_in3_min.dev_attr.attr,
399 &sensor_dev_attr_in3_max.dev_attr.attr,
400 &sensor_dev_attr_in3_alarm.dev_attr.attr,
401 &sensor_dev_attr_in5_input.dev_attr.attr,
402 &sensor_dev_attr_in5_min.dev_attr.attr,
403 &sensor_dev_attr_in5_max.dev_attr.attr,
404 &sensor_dev_attr_in5_alarm.dev_attr.attr,
405 &sensor_dev_attr_in6_input.dev_attr.attr,
406 &sensor_dev_attr_in6_min.dev_attr.attr,
407 &sensor_dev_attr_in6_max.dev_attr.attr,
408 &sensor_dev_attr_in6_alarm.dev_attr.attr,
409 &sensor_dev_attr_in7_input.dev_attr.attr,
410 &sensor_dev_attr_in7_min.dev_attr.attr,
411 &sensor_dev_attr_in7_max.dev_attr.attr,
412 &sensor_dev_attr_in7_alarm.dev_attr.attr,
413
414 &sensor_dev_attr_temp1_input.dev_attr.attr,
415 &sensor_dev_attr_temp1_max.dev_attr.attr,
416 &sensor_dev_attr_temp1_min.dev_attr.attr,
417 &sensor_dev_attr_temp1_offset.dev_attr.attr,
418 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
419 &sensor_dev_attr_temp2_input.dev_attr.attr,
420 &sensor_dev_attr_temp2_max.dev_attr.attr,
421 &sensor_dev_attr_temp2_min.dev_attr.attr,
422 &sensor_dev_attr_temp2_offset.dev_attr.attr,
423 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
424 &sensor_dev_attr_temp2_fault.dev_attr.attr,
425 &sensor_dev_attr_temp3_input.dev_attr.attr,
426 &sensor_dev_attr_temp3_max.dev_attr.attr,
427 &sensor_dev_attr_temp3_min.dev_attr.attr,
428 &sensor_dev_attr_temp3_offset.dev_attr.attr,
429 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
430 &sensor_dev_attr_temp3_fault.dev_attr.attr,
431
432 &dev_attr_cpu0_vid.attr,
433 &dev_attr_vrm.attr,
434 NULL
435 };
436
437 static const struct attribute_group smsc47m192_group = {
438 .attrs = smsc47m192_attributes,
439 };
440
441 static struct attribute *smsc47m192_attributes_in4[] = {
442 &sensor_dev_attr_in4_input.dev_attr.attr,
443 &sensor_dev_attr_in4_min.dev_attr.attr,
444 &sensor_dev_attr_in4_max.dev_attr.attr,
445 &sensor_dev_attr_in4_alarm.dev_attr.attr,
446 NULL
447 };
448
449 static const struct attribute_group smsc47m192_group_in4 = {
450 .attrs = smsc47m192_attributes_in4,
451 };
452
453 static void smsc47m192_init_client(struct i2c_client *client)
454 {
455 int i;
456 u8 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG);
457 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
458
459 /* select cycle mode (pause 1 sec between updates) */
460 i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR,
461 (sfr & 0xfd) | 0x02);
462 if (!(config & 0x01)) {
463 /* initialize alarm limits */
464 for (i=0; i<8; i++) {
465 i2c_smbus_write_byte_data(client,
466 SMSC47M192_REG_IN_MIN(i), 0);
467 i2c_smbus_write_byte_data(client,
468 SMSC47M192_REG_IN_MAX(i), 0xff);
469 }
470 for (i=0; i<3; i++) {
471 i2c_smbus_write_byte_data(client,
472 SMSC47M192_REG_TEMP_MIN[i], 0x80);
473 i2c_smbus_write_byte_data(client,
474 SMSC47M192_REG_TEMP_MAX[i], 0x7f);
475 }
476
477 /* start monitoring */
478 i2c_smbus_write_byte_data(client, SMSC47M192_REG_CONFIG,
479 (config & 0xf7) | 0x01);
480 }
481 }
482
483 /* Return 0 if detection is successful, -ENODEV otherwise */
484 static int smsc47m192_detect(struct i2c_client *client, int kind,
485 struct i2c_board_info *info)
486 {
487 struct i2c_adapter *adapter = client->adapter;
488 int version;
489
490 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
491 return -ENODEV;
492
493 /* Detection criteria from sensors_detect script */
494 if (kind < 0) {
495 if (i2c_smbus_read_byte_data(client,
496 SMSC47M192_REG_COMPANY_ID) == 0x55
497 && ((version = i2c_smbus_read_byte_data(client,
498 SMSC47M192_REG_VERSION)) & 0xf0) == 0x20
499 && (i2c_smbus_read_byte_data(client,
500 SMSC47M192_REG_VID) & 0x70) == 0x00
501 && (i2c_smbus_read_byte_data(client,
502 SMSC47M192_REG_VID4) & 0xfe) == 0x80) {
503 dev_info(&adapter->dev,
504 "found SMSC47M192 or compatible, "
505 "version 2, stepping A%d\n", version & 0x0f);
506 } else {
507 dev_dbg(&adapter->dev,
508 "SMSC47M192 detection failed at 0x%02x\n",
509 client->addr);
510 return -ENODEV;
511 }
512 }
513
514 strlcpy(info->type, "smsc47m192", I2C_NAME_SIZE);
515
516 return 0;
517 }
518
519 static int smsc47m192_probe(struct i2c_client *client,
520 const struct i2c_device_id *id)
521 {
522 struct smsc47m192_data *data;
523 int config;
524 int err;
525
526 data = kzalloc(sizeof(struct smsc47m192_data), GFP_KERNEL);
527 if (!data) {
528 err = -ENOMEM;
529 goto exit;
530 }
531
532 i2c_set_clientdata(client, data);
533 data->vrm = vid_which_vrm();
534 mutex_init(&data->update_lock);
535
536 /* Initialize the SMSC47M192 chip */
537 smsc47m192_init_client(client);
538
539 /* Register sysfs hooks */
540 if ((err = sysfs_create_group(&client->dev.kobj, &smsc47m192_group)))
541 goto exit_free;
542
543 /* Pin 110 is either in4 (+12V) or VID4 */
544 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG);
545 if (!(config & 0x20)) {
546 if ((err = sysfs_create_group(&client->dev.kobj,
547 &smsc47m192_group_in4)))
548 goto exit_remove_files;
549 }
550
551 data->hwmon_dev = hwmon_device_register(&client->dev);
552 if (IS_ERR(data->hwmon_dev)) {
553 err = PTR_ERR(data->hwmon_dev);
554 goto exit_remove_files;
555 }
556
557 return 0;
558
559 exit_remove_files:
560 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group);
561 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4);
562 exit_free:
563 kfree(data);
564 exit:
565 return err;
566 }
567
568 static int smsc47m192_remove(struct i2c_client *client)
569 {
570 struct smsc47m192_data *data = i2c_get_clientdata(client);
571
572 hwmon_device_unregister(data->hwmon_dev);
573 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group);
574 sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4);
575
576 kfree(data);
577
578 return 0;
579 }
580
581 static struct smsc47m192_data *smsc47m192_update_device(struct device *dev)
582 {
583 struct i2c_client *client = to_i2c_client(dev);
584 struct smsc47m192_data *data = i2c_get_clientdata(client);
585 int i, config;
586
587 mutex_lock(&data->update_lock);
588
589 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
590 || !data->valid) {
591 u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
592
593 dev_dbg(&client->dev, "Starting smsc47m192 update\n");
594
595 for (i = 0; i <= 7; i++) {
596 data->in[i] = i2c_smbus_read_byte_data(client,
597 SMSC47M192_REG_IN(i));
598 data->in_min[i] = i2c_smbus_read_byte_data(client,
599 SMSC47M192_REG_IN_MIN(i));
600 data->in_max[i] = i2c_smbus_read_byte_data(client,
601 SMSC47M192_REG_IN_MAX(i));
602 }
603 for (i = 0; i < 3; i++) {
604 data->temp[i] = i2c_smbus_read_byte_data(client,
605 SMSC47M192_REG_TEMP[i]);
606 data->temp_max[i] = i2c_smbus_read_byte_data(client,
607 SMSC47M192_REG_TEMP_MAX[i]);
608 data->temp_min[i] = i2c_smbus_read_byte_data(client,
609 SMSC47M192_REG_TEMP_MIN[i]);
610 }
611 for (i = 1; i < 3; i++)
612 data->temp_offset[i] = i2c_smbus_read_byte_data(client,
613 SMSC47M192_REG_TEMP_OFFSET(i));
614 /* first offset is temp_offset[0] if SFR bit 4 is set,
615 temp_offset[1] otherwise */
616 if (sfr & 0x10) {
617 data->temp_offset[0] = data->temp_offset[1];
618 data->temp_offset[1] = 0;
619 } else
620 data->temp_offset[0] = 0;
621
622 data->vid = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VID)
623 & 0x0f;
624 config = i2c_smbus_read_byte_data(client,
625 SMSC47M192_REG_CONFIG);
626 if (config & 0x20)
627 data->vid |= (i2c_smbus_read_byte_data(client,
628 SMSC47M192_REG_VID4) & 0x01) << 4;
629 data->alarms = i2c_smbus_read_byte_data(client,
630 SMSC47M192_REG_ALARM1) |
631 (i2c_smbus_read_byte_data(client,
632 SMSC47M192_REG_ALARM2) << 8);
633
634 data->last_updated = jiffies;
635 data->valid = 1;
636 }
637
638 mutex_unlock(&data->update_lock);
639
640 return data;
641 }
642
643 static int __init smsc47m192_init(void)
644 {
645 return i2c_add_driver(&smsc47m192_driver);
646 }
647
648 static void __exit smsc47m192_exit(void)
649 {
650 i2c_del_driver(&smsc47m192_driver);
651 }
652
653 MODULE_AUTHOR("Hartmut Rick <linux@rick.claranet.de>");
654 MODULE_DESCRIPTION("SMSC47M192 driver");
655 MODULE_LICENSE("GPL");
656
657 module_init(smsc47m192_init);
658 module_exit(smsc47m192_exit);
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