3beaa6191ef4ca5b6ba926fdc9c864d66d145ccc
[linux-2.6.git] / drivers / hwmon / fscpos.c
1 /*
2         fscpos.c - Kernel module for hardware monitoring with FSC Poseidon chips
3         Copyright (C) 2004, 2005 Stefan Ott <stefan@desire.ch>
4
5         This program is free software; you can redistribute it and/or modify
6         it under the terms of the GNU General Public License as published by
7         the Free Software Foundation; either version 2 of the License, or
8         (at your option) any later version.
9
10         This program is distributed in the hope that it will be useful,
11         but WITHOUT ANY WARRANTY; without even the implied warranty of
12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13         GNU General Public License for more details.
14
15         You should have received a copy of the GNU General Public License
16         along with this program; if not, write to the Free Software
17         Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19
20 /*
21         fujitsu siemens poseidon chip,
22         module based on the old fscpos module by Hermann Jung <hej@odn.de> and
23         the fscher module by Reinhard Nissl <rnissl@gmx.de>
24
25         original module based on lm80.c
26         Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
27         and Philip Edelbrock <phil@netroedge.com>
28
29         Thanks to Jean Delvare for reviewing my code and suggesting a lot of
30         improvements.
31 */
32
33 #include <linux/module.h>
34 #include <linux/slab.h>
35 #include <linux/i2c.h>
36 #include <linux/i2c-sensor.h>
37 #include <linux/init.h>
38
39 /*
40  * Addresses to scan
41  */
42 static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
43 static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
44
45 /*
46  * Insmod parameters
47  */
48 SENSORS_INSMOD_1(fscpos);
49
50 /*
51  * The FSCPOS registers
52  */
53
54 /* chip identification */
55 #define FSCPOS_REG_IDENT_0              0x00
56 #define FSCPOS_REG_IDENT_1              0x01
57 #define FSCPOS_REG_IDENT_2              0x02
58 #define FSCPOS_REG_REVISION             0x03
59
60 /* global control and status */
61 #define FSCPOS_REG_EVENT_STATE          0x04
62 #define FSCPOS_REG_CONTROL              0x05
63
64 /* watchdog */
65 #define FSCPOS_REG_WDOG_PRESET          0x28
66 #define FSCPOS_REG_WDOG_STATE           0x23
67 #define FSCPOS_REG_WDOG_CONTROL         0x21
68
69 /* voltages */
70 #define FSCPOS_REG_VOLT_12              0x45
71 #define FSCPOS_REG_VOLT_5               0x42
72 #define FSCPOS_REG_VOLT_BATT            0x48
73
74 /* fans - the chip does not support minimum speed for fan2 */
75 static u8 FSCPOS_REG_PWM[] = { 0x55, 0x65 };
76 static u8 FSCPOS_REG_FAN_ACT[] = { 0x0e, 0x6b, 0xab };
77 static u8 FSCPOS_REG_FAN_STATE[] = { 0x0d, 0x62, 0xa2 };
78 static u8 FSCPOS_REG_FAN_RIPPLE[] = { 0x0f, 0x6f, 0xaf };
79
80 /* temperatures */
81 static u8 FSCPOS_REG_TEMP_ACT[] = { 0x64, 0x32, 0x35 };
82 static u8 FSCPOS_REG_TEMP_STATE[] = { 0x71, 0x81, 0x91 };
83
84 /*
85  * Functions declaration
86  */
87 static int fscpos_attach_adapter(struct i2c_adapter *adapter);
88 static int fscpos_detect(struct i2c_adapter *adapter, int address, int kind);
89 static int fscpos_detach_client(struct i2c_client *client);
90
91 static int fscpos_read_value(struct i2c_client *client, u8 register);
92 static int fscpos_write_value(struct i2c_client *client, u8 register, u8 value);
93 static struct fscpos_data *fscpos_update_device(struct device *dev);
94 static void fscpos_init_client(struct i2c_client *client);
95
96 static void reset_fan_alarm(struct i2c_client *client, int nr);
97
98 /*
99  * Driver data (common to all clients)
100  */
101 static struct i2c_driver fscpos_driver = {
102         .owner          = THIS_MODULE,
103         .name           = "fscpos",
104         .id             = I2C_DRIVERID_FSCPOS,
105         .flags          = I2C_DF_NOTIFY,
106         .attach_adapter = fscpos_attach_adapter,
107         .detach_client  = fscpos_detach_client,
108 };
109
110 /*
111  * Client data (each client gets its own)
112  */
113 struct fscpos_data {
114         struct i2c_client client;
115         struct semaphore update_lock;
116         char valid;             /* 0 until following fields are valid */
117         unsigned long last_updated;     /* In jiffies */
118
119         /* register values */
120         u8 revision;            /* revision of chip */
121         u8 global_event;        /* global event status */
122         u8 global_control;      /* global control register */
123         u8 wdog_control;        /* watchdog control */
124         u8 wdog_state;          /* watchdog status */
125         u8 wdog_preset;         /* watchdog preset */
126         u8 volt[3];             /* 12, 5, battery current */
127         u8 temp_act[3];         /* temperature */
128         u8 temp_status[3];      /* status of sensor */
129         u8 fan_act[3];          /* fans revolutions per second */
130         u8 fan_status[3];       /* fan status */
131         u8 pwm[2];              /* fan min value for rps */
132         u8 fan_ripple[3];       /* divider for rps */
133 };
134
135 /* Temperature */
136 #define TEMP_FROM_REG(val)      (((val) - 128) * 1000)
137
138 static ssize_t show_temp_input(struct fscpos_data *data, char *buf, int nr)
139 {
140         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[nr - 1]));
141 }
142
143 static ssize_t show_temp_status(struct fscpos_data *data, char *buf, int nr)
144 {
145         /* bits 2..7 reserved => mask with 0x03 */
146         return sprintf(buf, "%u\n", data->temp_status[nr - 1] & 0x03);
147 }
148
149 static ssize_t show_temp_reset(struct fscpos_data *data, char *buf, int nr)
150 {
151         return sprintf(buf, "1\n");
152 }
153
154 static ssize_t set_temp_reset(struct i2c_client *client, struct fscpos_data
155                         *data, const char *buf, size_t count, int nr, int reg)
156 {
157         unsigned long v = simple_strtoul(buf, NULL, 10);
158         if (v != 1) {
159                 dev_err(&client->dev, "temp_reset value %ld not supported. "
160                                         "Use 1 to reset the alarm!\n", v);
161                 return -EINVAL;
162         }
163
164         dev_info(&client->dev, "You used the temp_reset feature which has not "
165                                 "been proplerly tested. Please report your "
166                                 "experience to the module author.\n");
167
168         /* Supported value: 2 (clears the status) */
169         fscpos_write_value(client, FSCPOS_REG_TEMP_STATE[nr], 2);
170         return count;
171 }
172
173 /* Fans */
174 #define RPM_FROM_REG(val)       ((val) * 60)
175
176 static ssize_t show_fan_status(struct fscpos_data *data, char *buf, int nr)
177 {
178         /* bits 0..1, 3..7 reserved => mask with 0x04 */
179         return sprintf(buf, "%u\n", data->fan_status[nr - 1] & 0x04);
180 }
181
182 static ssize_t show_fan_input(struct fscpos_data *data, char *buf, int nr)
183 {
184         return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[nr - 1]));
185 }
186
187 static ssize_t show_fan_ripple(struct fscpos_data *data, char *buf, int nr)
188 {
189         /* bits 2..7 reserved => mask with 0x03 */
190         return sprintf(buf, "%u\n", data->fan_ripple[nr - 1] & 0x03);
191 }
192
193 static ssize_t set_fan_ripple(struct i2c_client *client, struct fscpos_data
194                         *data, const char *buf, size_t count, int nr, int reg)
195 {
196         /* supported values: 2, 4, 8 */
197         unsigned long v = simple_strtoul(buf, NULL, 10);
198
199         switch (v) {
200                 case 2: v = 1; break;
201                 case 4: v = 2; break;
202                 case 8: v = 3; break;
203         default:
204                 dev_err(&client->dev, "fan_ripple value %ld not supported. "
205                                         "Must be one of 2, 4 or 8!\n", v);
206                 return -EINVAL;
207         }
208         
209         down(&data->update_lock);
210         /* bits 2..7 reserved => mask with 0x03 */
211         data->fan_ripple[nr - 1] &= ~0x03;
212         data->fan_ripple[nr - 1] |= v;
213         
214         fscpos_write_value(client, reg, data->fan_ripple[nr - 1]);
215         up(&data->update_lock);
216         return count;
217 }
218
219 static ssize_t show_pwm(struct fscpos_data *data, char *buf, int nr)
220 {
221         return sprintf(buf, "%u\n", data->pwm[nr - 1]);
222 }
223
224 static ssize_t set_pwm(struct i2c_client *client, struct fscpos_data *data,
225                                 const char *buf, size_t count, int nr, int reg)
226 {
227         unsigned long v = simple_strtoul(buf, NULL, 10);
228
229         /* Range: 0..255 */
230         if (v < 0) v = 0;
231         if (v > 255) v = 255;
232
233         down(&data->update_lock);
234         data->pwm[nr - 1] = v;
235         fscpos_write_value(client, reg, data->pwm[nr - 1]);
236         up(&data->update_lock);
237         return count;
238 }
239
240 static void reset_fan_alarm(struct i2c_client *client, int nr)
241 {
242         fscpos_write_value(client, FSCPOS_REG_FAN_STATE[nr], 4);
243 }
244
245 /* Volts */
246 #define VOLT_FROM_REG(val, mult)        ((val) * (mult) / 255)
247
248 static ssize_t show_volt_12(struct device *dev, struct device_attribute *attr, char *buf)
249 {
250         struct fscpos_data *data = fscpos_update_device(dev);
251         return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[0], 14200));
252 }
253
254 static ssize_t show_volt_5(struct device *dev, struct device_attribute *attr, char *buf)
255 {
256         struct fscpos_data *data = fscpos_update_device(dev);
257         return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[1], 6600));
258 }
259
260 static ssize_t show_volt_batt(struct device *dev, struct device_attribute *attr, char *buf)
261 {
262         struct fscpos_data *data = fscpos_update_device(dev);
263         return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[2], 3300));
264 }
265
266 /* Watchdog */
267 static ssize_t show_wdog_control(struct fscpos_data *data, char *buf)
268 {
269         /* bits 0..3 reserved, bit 6 write only => mask with 0xb0 */
270         return sprintf(buf, "%u\n", data->wdog_control & 0xb0);
271 }
272
273 static ssize_t set_wdog_control(struct i2c_client *client, struct fscpos_data
274                                 *data, const char *buf, size_t count, int reg)
275 {
276         /* bits 0..3 reserved => mask with 0xf0 */
277         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
278
279         down(&data->update_lock);
280         data->wdog_control &= ~0xf0;
281         data->wdog_control |= v;
282         fscpos_write_value(client, reg, data->wdog_control);
283         up(&data->update_lock);
284         return count;
285 }
286
287 static ssize_t show_wdog_state(struct fscpos_data *data, char *buf)
288 {
289         /* bits 0, 2..7 reserved => mask with 0x02 */
290         return sprintf(buf, "%u\n", data->wdog_state & 0x02);
291 }
292
293 static ssize_t set_wdog_state(struct i2c_client *client, struct fscpos_data
294                                 *data, const char *buf, size_t count, int reg)
295 {
296         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
297
298         /* Valid values: 2 (clear) */
299         if (v != 2) {
300                 dev_err(&client->dev, "wdog_state value %ld not supported. "
301                                         "Must be 2 to clear the state!\n", v);
302                 return -EINVAL;
303         }
304
305         down(&data->update_lock);
306         data->wdog_state &= ~v;
307         fscpos_write_value(client, reg, v);
308         up(&data->update_lock);
309         return count;
310 }
311
312 static ssize_t show_wdog_preset(struct fscpos_data *data, char *buf)
313 {
314         return sprintf(buf, "%u\n", data->wdog_preset);
315 }
316
317 static ssize_t set_wdog_preset(struct i2c_client *client, struct fscpos_data
318                                 *data, const char *buf, size_t count, int reg)
319 {
320         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
321
322         down(&data->update_lock);
323         data->wdog_preset = v;
324         fscpos_write_value(client, reg, data->wdog_preset);
325         up(&data->update_lock);
326         return count;
327 }
328
329 /* Event */
330 static ssize_t show_event(struct device *dev, struct device_attribute *attr, char *buf)
331 {
332         /* bits 5..7 reserved => mask with 0x1f */
333         struct fscpos_data *data = fscpos_update_device(dev);
334         return sprintf(buf, "%u\n", data->global_event & 0x9b);
335 }
336
337 /*
338  * Sysfs stuff
339  */
340 #define create_getter(kind, sub) \
341         static ssize_t sysfs_show_##kind##sub(struct device *dev, struct device_attribute *attr, char *buf) \
342         { \
343                 struct fscpos_data *data = fscpos_update_device(dev); \
344                 return show_##kind##sub(data, buf); \
345         }
346
347 #define create_getter_n(kind, offset, sub) \
348         static ssize_t sysfs_show_##kind##offset##sub(struct device *dev, struct device_attribute *attr, char\
349                                                                         *buf) \
350         { \
351                 struct fscpos_data *data = fscpos_update_device(dev); \
352                 return show_##kind##sub(data, buf, offset); \
353         }
354
355 #define create_setter(kind, sub, reg) \
356         static ssize_t sysfs_set_##kind##sub (struct device *dev, struct device_attribute *attr, const char \
357                                                         *buf, size_t count) \
358         { \
359                 struct i2c_client *client = to_i2c_client(dev); \
360                 struct fscpos_data *data = i2c_get_clientdata(client); \
361                 return set_##kind##sub(client, data, buf, count, reg); \
362         }
363
364 #define create_setter_n(kind, offset, sub, reg) \
365         static ssize_t sysfs_set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, \
366                                         const char *buf, size_t count) \
367         { \
368                 struct i2c_client *client = to_i2c_client(dev); \
369                 struct fscpos_data *data = i2c_get_clientdata(client); \
370                 return set_##kind##sub(client, data, buf, count, offset, reg);\
371         }
372
373 #define create_sysfs_device_ro(kind, sub, offset) \
374         static DEVICE_ATTR(kind##offset##sub, S_IRUGO, \
375                                         sysfs_show_##kind##offset##sub, NULL);
376
377 #define create_sysfs_device_rw(kind, sub, offset) \
378         static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, \
379                 sysfs_show_##kind##offset##sub, sysfs_set_##kind##offset##sub);
380
381 #define sysfs_ro_n(kind, sub, offset) \
382         create_getter_n(kind, offset, sub); \
383         create_sysfs_device_ro(kind, sub, offset);
384
385 #define sysfs_rw_n(kind, sub, offset, reg) \
386         create_getter_n(kind, offset, sub); \
387         create_setter_n(kind, offset, sub, reg); \
388         create_sysfs_device_rw(kind, sub, offset);
389
390 #define sysfs_rw(kind, sub, reg) \
391         create_getter(kind, sub); \
392         create_setter(kind, sub, reg); \
393         create_sysfs_device_rw(kind, sub,);
394
395 #define sysfs_fan_with_min(offset, reg_status, reg_ripple, reg_min) \
396         sysfs_fan(offset, reg_status, reg_ripple); \
397         sysfs_rw_n(pwm,, offset, reg_min);
398
399 #define sysfs_fan(offset, reg_status, reg_ripple) \
400         sysfs_ro_n(fan, _input, offset); \
401         sysfs_ro_n(fan, _status, offset); \
402         sysfs_rw_n(fan, _ripple, offset, reg_ripple);
403
404 #define sysfs_temp(offset, reg_status) \
405         sysfs_ro_n(temp, _input, offset); \
406         sysfs_ro_n(temp, _status, offset); \
407         sysfs_rw_n(temp, _reset, offset, reg_status);
408
409 #define sysfs_watchdog(reg_wdog_preset, reg_wdog_state, reg_wdog_control) \
410         sysfs_rw(wdog, _control, reg_wdog_control); \
411         sysfs_rw(wdog, _preset, reg_wdog_preset); \
412         sysfs_rw(wdog, _state, reg_wdog_state);
413
414 sysfs_fan_with_min(1, FSCPOS_REG_FAN_STATE[0], FSCPOS_REG_FAN_RIPPLE[0],
415                                                         FSCPOS_REG_PWM[0]);
416 sysfs_fan_with_min(2, FSCPOS_REG_FAN_STATE[1], FSCPOS_REG_FAN_RIPPLE[1],
417                                                         FSCPOS_REG_PWM[1]);
418 sysfs_fan(3, FSCPOS_REG_FAN_STATE[2], FSCPOS_REG_FAN_RIPPLE[2]);
419
420 sysfs_temp(1, FSCPOS_REG_TEMP_STATE[0]);
421 sysfs_temp(2, FSCPOS_REG_TEMP_STATE[1]);
422 sysfs_temp(3, FSCPOS_REG_TEMP_STATE[2]);
423
424 sysfs_watchdog(FSCPOS_REG_WDOG_PRESET, FSCPOS_REG_WDOG_STATE,
425                                                 FSCPOS_REG_WDOG_CONTROL);
426
427 static DEVICE_ATTR(event, S_IRUGO, show_event, NULL);
428 static DEVICE_ATTR(in0_input, S_IRUGO, show_volt_12, NULL);
429 static DEVICE_ATTR(in1_input, S_IRUGO, show_volt_5, NULL);
430 static DEVICE_ATTR(in2_input, S_IRUGO, show_volt_batt, NULL);
431
432 static int fscpos_attach_adapter(struct i2c_adapter *adapter)
433 {
434         if (!(adapter->class & I2C_CLASS_HWMON))
435                 return 0;
436         return i2c_detect(adapter, &addr_data, fscpos_detect);
437 }
438
439 int fscpos_detect(struct i2c_adapter *adapter, int address, int kind)
440 {
441         struct i2c_client *new_client;
442         struct fscpos_data *data;
443         int err = 0;
444
445         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
446                 goto exit;
447
448         /*
449          * OK. For now, we presume we have a valid client. We now create the
450          * client structure, even though we cannot fill it completely yet.
451          * But it allows us to access fscpos_{read,write}_value.
452          */
453
454         if (!(data = kmalloc(sizeof(struct fscpos_data), GFP_KERNEL))) {
455                 err = -ENOMEM;
456                 goto exit;
457         }
458         memset(data, 0, sizeof(struct fscpos_data));
459
460         new_client = &data->client;
461         i2c_set_clientdata(new_client, data);
462         new_client->addr = address;
463         new_client->adapter = adapter;
464         new_client->driver = &fscpos_driver;
465         new_client->flags = 0;
466
467         /* Do the remaining detection unless force or force_fscpos parameter */
468         if (kind < 0) {
469                 if ((fscpos_read_value(new_client, FSCPOS_REG_IDENT_0)
470                         != 0x50) /* 'P' */
471                 || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_1)
472                         != 0x45) /* 'E' */
473                 || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_2)
474                         != 0x47))/* 'G' */
475                 {
476                         dev_dbg(&new_client->dev, "fscpos detection failed\n");
477                         goto exit_free;
478                 }
479         }
480
481         /* Fill in the remaining client fields and put it in the global list */
482         strlcpy(new_client->name, "fscpos", I2C_NAME_SIZE);
483
484         data->valid = 0;
485         init_MUTEX(&data->update_lock);
486
487         /* Tell the I2C layer a new client has arrived */
488         if ((err = i2c_attach_client(new_client)))
489                 goto exit_free;
490
491         /* Inizialize the fscpos chip */
492         fscpos_init_client(new_client);
493
494         /* Announce that the chip was found */
495         dev_info(&new_client->dev, "Found fscpos chip, rev %u\n", data->revision);
496
497         /* Register sysfs hooks */
498         device_create_file(&new_client->dev, &dev_attr_event);
499         device_create_file(&new_client->dev, &dev_attr_in0_input);
500         device_create_file(&new_client->dev, &dev_attr_in1_input);
501         device_create_file(&new_client->dev, &dev_attr_in2_input);
502         device_create_file(&new_client->dev, &dev_attr_wdog_control);
503         device_create_file(&new_client->dev, &dev_attr_wdog_preset);
504         device_create_file(&new_client->dev, &dev_attr_wdog_state);
505         device_create_file(&new_client->dev, &dev_attr_temp1_input);
506         device_create_file(&new_client->dev, &dev_attr_temp1_status);
507         device_create_file(&new_client->dev, &dev_attr_temp1_reset);
508         device_create_file(&new_client->dev, &dev_attr_temp2_input);
509         device_create_file(&new_client->dev, &dev_attr_temp2_status);
510         device_create_file(&new_client->dev, &dev_attr_temp2_reset);
511         device_create_file(&new_client->dev, &dev_attr_temp3_input);
512         device_create_file(&new_client->dev, &dev_attr_temp3_status);
513         device_create_file(&new_client->dev, &dev_attr_temp3_reset);
514         device_create_file(&new_client->dev, &dev_attr_fan1_input);
515         device_create_file(&new_client->dev, &dev_attr_fan1_status);
516         device_create_file(&new_client->dev, &dev_attr_fan1_ripple);
517         device_create_file(&new_client->dev, &dev_attr_pwm1);
518         device_create_file(&new_client->dev, &dev_attr_fan2_input);
519         device_create_file(&new_client->dev, &dev_attr_fan2_status);
520         device_create_file(&new_client->dev, &dev_attr_fan2_ripple);
521         device_create_file(&new_client->dev, &dev_attr_pwm2);
522         device_create_file(&new_client->dev, &dev_attr_fan3_input);
523         device_create_file(&new_client->dev, &dev_attr_fan3_status);
524         device_create_file(&new_client->dev, &dev_attr_fan3_ripple);
525
526         return 0;
527
528 exit_free:
529         kfree(data);
530 exit:
531         return err;
532 }
533
534 static int fscpos_detach_client(struct i2c_client *client)
535 {
536         int err;
537
538         if ((err = i2c_detach_client(client))) {
539                 dev_err(&client->dev, "Client deregistration failed, client"
540                                                         " not detached.\n");
541                 return err;
542         }
543         kfree(i2c_get_clientdata(client));
544         return 0;
545 }
546
547 static int fscpos_read_value(struct i2c_client *client, u8 reg)
548 {
549         dev_dbg(&client->dev, "Read reg 0x%02x\n", reg);
550         return i2c_smbus_read_byte_data(client, reg);
551 }
552
553 static int fscpos_write_value(struct i2c_client *client, u8 reg, u8 value)
554 {
555         dev_dbg(&client->dev, "Write reg 0x%02x, val 0x%02x\n", reg, value);
556         return i2c_smbus_write_byte_data(client, reg, value);
557 }
558
559 /* Called when we have found a new FSCPOS chip */
560 static void fscpos_init_client(struct i2c_client *client)
561 {
562         struct fscpos_data *data = i2c_get_clientdata(client);
563
564         /* read revision from chip */
565         data->revision = fscpos_read_value(client, FSCPOS_REG_REVISION);
566 }
567
568 static struct fscpos_data *fscpos_update_device(struct device *dev)
569 {
570         struct i2c_client *client = to_i2c_client(dev);
571         struct fscpos_data *data = i2c_get_clientdata(client);
572
573         down(&data->update_lock);
574
575         if ((jiffies - data->last_updated > 2 * HZ) ||
576                         (jiffies < data->last_updated) || !data->valid) {
577                 int i;
578
579                 dev_dbg(&client->dev, "Starting fscpos update\n");
580
581                 for (i = 0; i < 3; i++) {
582                         data->temp_act[i] = fscpos_read_value(client,
583                                                 FSCPOS_REG_TEMP_ACT[i]);
584                         data->temp_status[i] = fscpos_read_value(client,
585                                                 FSCPOS_REG_TEMP_STATE[i]);
586                         data->fan_act[i] = fscpos_read_value(client,
587                                                 FSCPOS_REG_FAN_ACT[i]);
588                         data->fan_status[i] = fscpos_read_value(client,
589                                                 FSCPOS_REG_FAN_STATE[i]);
590                         data->fan_ripple[i] = fscpos_read_value(client,
591                                                 FSCPOS_REG_FAN_RIPPLE[i]);
592                         if (i < 2) {
593                                 /* fan2_min is not supported by the chip */
594                                 data->pwm[i] = fscpos_read_value(client,
595                                                         FSCPOS_REG_PWM[i]);
596                         }
597                         /* reset fan status if speed is back to > 0 */
598                         if (data->fan_status[i] != 0 && data->fan_act[i] > 0) {
599                                 reset_fan_alarm(client, i);
600                         }
601                 }
602
603                 data->volt[0] = fscpos_read_value(client, FSCPOS_REG_VOLT_12);
604                 data->volt[1] = fscpos_read_value(client, FSCPOS_REG_VOLT_5);
605                 data->volt[2] = fscpos_read_value(client, FSCPOS_REG_VOLT_BATT);
606
607                 data->wdog_preset = fscpos_read_value(client,
608                                                         FSCPOS_REG_WDOG_PRESET);
609                 data->wdog_state = fscpos_read_value(client,
610                                                         FSCPOS_REG_WDOG_STATE);
611                 data->wdog_control = fscpos_read_value(client,
612                                                 FSCPOS_REG_WDOG_CONTROL);
613
614                 data->global_event = fscpos_read_value(client,
615                                                 FSCPOS_REG_EVENT_STATE);
616
617                 data->last_updated = jiffies;
618                 data->valid = 1;
619         }
620         up(&data->update_lock);
621         return data;
622 }
623
624 static int __init sm_fscpos_init(void)
625 {
626         return i2c_add_driver(&fscpos_driver);
627 }
628
629 static void __exit sm_fscpos_exit(void)
630 {
631         i2c_del_driver(&fscpos_driver);
632 }
633
634 MODULE_AUTHOR("Stefan Ott <stefan@desire.ch> based on work from Hermann Jung "
635                                 "<hej@odn.de>, Frodo Looijaard <frodol@dds.nl>"
636                                 " and Philip Edelbrock <phil@netroedge.com>");
637 MODULE_DESCRIPTION("fujitsu siemens poseidon chip driver");
638 MODULE_LICENSE("GPL");
639
640 module_init(sm_fscpos_init);
641 module_exit(sm_fscpos_exit);