6d0146b570201533d99b346e4aa1612c4fbcd06c
[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/jiffies.h>
36 #include <linux/i2c.h>
37 #include <linux/init.h>
38 #include <linux/hwmon.h>
39 #include <linux/err.h>
40
41 /*
42  * Addresses to scan
43  */
44 static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
45
46 /*
47  * Insmod parameters
48  */
49 I2C_CLIENT_INSMOD_1(fscpos);
50
51 /*
52  * The FSCPOS registers
53  */
54
55 /* chip identification */
56 #define FSCPOS_REG_IDENT_0              0x00
57 #define FSCPOS_REG_IDENT_1              0x01
58 #define FSCPOS_REG_IDENT_2              0x02
59 #define FSCPOS_REG_REVISION             0x03
60
61 /* global control and status */
62 #define FSCPOS_REG_EVENT_STATE          0x04
63 #define FSCPOS_REG_CONTROL              0x05
64
65 /* watchdog */
66 #define FSCPOS_REG_WDOG_PRESET          0x28
67 #define FSCPOS_REG_WDOG_STATE           0x23
68 #define FSCPOS_REG_WDOG_CONTROL         0x21
69
70 /* voltages */
71 #define FSCPOS_REG_VOLT_12              0x45
72 #define FSCPOS_REG_VOLT_5               0x42
73 #define FSCPOS_REG_VOLT_BATT            0x48
74
75 /* fans - the chip does not support minimum speed for fan2 */
76 static u8 FSCPOS_REG_PWM[] = { 0x55, 0x65 };
77 static u8 FSCPOS_REG_FAN_ACT[] = { 0x0e, 0x6b, 0xab };
78 static u8 FSCPOS_REG_FAN_STATE[] = { 0x0d, 0x62, 0xa2 };
79 static u8 FSCPOS_REG_FAN_RIPPLE[] = { 0x0f, 0x6f, 0xaf };
80
81 /* temperatures */
82 static u8 FSCPOS_REG_TEMP_ACT[] = { 0x64, 0x32, 0x35 };
83 static u8 FSCPOS_REG_TEMP_STATE[] = { 0x71, 0x81, 0x91 };
84
85 /*
86  * Functions declaration
87  */
88 static int fscpos_attach_adapter(struct i2c_adapter *adapter);
89 static int fscpos_detect(struct i2c_adapter *adapter, int address, int kind);
90 static int fscpos_detach_client(struct i2c_client *client);
91
92 static int fscpos_read_value(struct i2c_client *client, u8 register);
93 static int fscpos_write_value(struct i2c_client *client, u8 register, u8 value);
94 static struct fscpos_data *fscpos_update_device(struct device *dev);
95 static void fscpos_init_client(struct i2c_client *client);
96
97 static void reset_fan_alarm(struct i2c_client *client, int nr);
98
99 /*
100  * Driver data (common to all clients)
101  */
102 static struct i2c_driver fscpos_driver = {
103         .driver = {
104                 .name   = "fscpos",
105         },
106         .id             = I2C_DRIVERID_FSCPOS,
107         .attach_adapter = fscpos_attach_adapter,
108         .detach_client  = fscpos_detach_client,
109 };
110
111 /*
112  * Client data (each client gets its own)
113  */
114 struct fscpos_data {
115         struct i2c_client client;
116         struct class_device *class_dev;
117         struct semaphore update_lock;
118         char valid;             /* 0 until following fields are valid */
119         unsigned long last_updated;     /* In jiffies */
120
121         /* register values */
122         u8 revision;            /* revision of chip */
123         u8 global_event;        /* global event status */
124         u8 global_control;      /* global control register */
125         u8 wdog_control;        /* watchdog control */
126         u8 wdog_state;          /* watchdog status */
127         u8 wdog_preset;         /* watchdog preset */
128         u8 volt[3];             /* 12, 5, battery current */
129         u8 temp_act[3];         /* temperature */
130         u8 temp_status[3];      /* status of sensor */
131         u8 fan_act[3];          /* fans revolutions per second */
132         u8 fan_status[3];       /* fan status */
133         u8 pwm[2];              /* fan min value for rps */
134         u8 fan_ripple[3];       /* divider for rps */
135 };
136
137 /* Temperature */
138 #define TEMP_FROM_REG(val)      (((val) - 128) * 1000)
139
140 static ssize_t show_temp_input(struct fscpos_data *data, char *buf, int nr)
141 {
142         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[nr - 1]));
143 }
144
145 static ssize_t show_temp_status(struct fscpos_data *data, char *buf, int nr)
146 {
147         /* bits 2..7 reserved => mask with 0x03 */
148         return sprintf(buf, "%u\n", data->temp_status[nr - 1] & 0x03);
149 }
150
151 static ssize_t show_temp_reset(struct fscpos_data *data, char *buf, int nr)
152 {
153         return sprintf(buf, "1\n");
154 }
155
156 static ssize_t set_temp_reset(struct i2c_client *client, struct fscpos_data
157                         *data, const char *buf, size_t count, int nr, int reg)
158 {
159         unsigned long v = simple_strtoul(buf, NULL, 10);
160         if (v != 1) {
161                 dev_err(&client->dev, "temp_reset value %ld not supported. "
162                                         "Use 1 to reset the alarm!\n", v);
163                 return -EINVAL;
164         }
165
166         dev_info(&client->dev, "You used the temp_reset feature which has not "
167                                 "been proplerly tested. Please report your "
168                                 "experience to the module author.\n");
169
170         /* Supported value: 2 (clears the status) */
171         fscpos_write_value(client, FSCPOS_REG_TEMP_STATE[nr - 1], 2);
172         return count;
173 }
174
175 /* Fans */
176 #define RPM_FROM_REG(val)       ((val) * 60)
177
178 static ssize_t show_fan_status(struct fscpos_data *data, char *buf, int nr)
179 {
180         /* bits 0..1, 3..7 reserved => mask with 0x04 */
181         return sprintf(buf, "%u\n", data->fan_status[nr - 1] & 0x04);
182 }
183
184 static ssize_t show_fan_input(struct fscpos_data *data, char *buf, int nr)
185 {
186         return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[nr - 1]));
187 }
188
189 static ssize_t show_fan_ripple(struct fscpos_data *data, char *buf, int nr)
190 {
191         /* bits 2..7 reserved => mask with 0x03 */
192         return sprintf(buf, "%u\n", data->fan_ripple[nr - 1] & 0x03);
193 }
194
195 static ssize_t set_fan_ripple(struct i2c_client *client, struct fscpos_data
196                         *data, const char *buf, size_t count, int nr, int reg)
197 {
198         /* supported values: 2, 4, 8 */
199         unsigned long v = simple_strtoul(buf, NULL, 10);
200
201         switch (v) {
202                 case 2: v = 1; break;
203                 case 4: v = 2; break;
204                 case 8: v = 3; break;
205         default:
206                 dev_err(&client->dev, "fan_ripple value %ld not supported. "
207                                         "Must be one of 2, 4 or 8!\n", v);
208                 return -EINVAL;
209         }
210         
211         down(&data->update_lock);
212         /* bits 2..7 reserved => mask with 0x03 */
213         data->fan_ripple[nr - 1] &= ~0x03;
214         data->fan_ripple[nr - 1] |= v;
215         
216         fscpos_write_value(client, reg, data->fan_ripple[nr - 1]);
217         up(&data->update_lock);
218         return count;
219 }
220
221 static ssize_t show_pwm(struct fscpos_data *data, char *buf, int nr)
222 {
223         return sprintf(buf, "%u\n", data->pwm[nr - 1]);
224 }
225
226 static ssize_t set_pwm(struct i2c_client *client, struct fscpos_data *data,
227                                 const char *buf, size_t count, int nr, int reg)
228 {
229         unsigned long v = simple_strtoul(buf, NULL, 10);
230
231         /* Range: 0..255 */
232         if (v < 0) v = 0;
233         if (v > 255) v = 255;
234
235         down(&data->update_lock);
236         data->pwm[nr - 1] = v;
237         fscpos_write_value(client, reg, data->pwm[nr - 1]);
238         up(&data->update_lock);
239         return count;
240 }
241
242 static void reset_fan_alarm(struct i2c_client *client, int nr)
243 {
244         fscpos_write_value(client, FSCPOS_REG_FAN_STATE[nr], 4);
245 }
246
247 /* Volts */
248 #define VOLT_FROM_REG(val, mult)        ((val) * (mult) / 255)
249
250 static ssize_t show_volt_12(struct device *dev, struct device_attribute *attr, char *buf)
251 {
252         struct fscpos_data *data = fscpos_update_device(dev);
253         return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[0], 14200));
254 }
255
256 static ssize_t show_volt_5(struct device *dev, struct device_attribute *attr, char *buf)
257 {
258         struct fscpos_data *data = fscpos_update_device(dev);
259         return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[1], 6600));
260 }
261
262 static ssize_t show_volt_batt(struct device *dev, struct device_attribute *attr, char *buf)
263 {
264         struct fscpos_data *data = fscpos_update_device(dev);
265         return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[2], 3300));
266 }
267
268 /* Watchdog */
269 static ssize_t show_wdog_control(struct fscpos_data *data, char *buf)
270 {
271         /* bits 0..3 reserved, bit 6 write only => mask with 0xb0 */
272         return sprintf(buf, "%u\n", data->wdog_control & 0xb0);
273 }
274
275 static ssize_t set_wdog_control(struct i2c_client *client, struct fscpos_data
276                                 *data, const char *buf, size_t count, int reg)
277 {
278         /* bits 0..3 reserved => mask with 0xf0 */
279         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
280
281         down(&data->update_lock);
282         data->wdog_control &= ~0xf0;
283         data->wdog_control |= v;
284         fscpos_write_value(client, reg, data->wdog_control);
285         up(&data->update_lock);
286         return count;
287 }
288
289 static ssize_t show_wdog_state(struct fscpos_data *data, char *buf)
290 {
291         /* bits 0, 2..7 reserved => mask with 0x02 */
292         return sprintf(buf, "%u\n", data->wdog_state & 0x02);
293 }
294
295 static ssize_t set_wdog_state(struct i2c_client *client, struct fscpos_data
296                                 *data, const char *buf, size_t count, int reg)
297 {
298         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
299
300         /* Valid values: 2 (clear) */
301         if (v != 2) {
302                 dev_err(&client->dev, "wdog_state value %ld not supported. "
303                                         "Must be 2 to clear the state!\n", v);
304                 return -EINVAL;
305         }
306
307         down(&data->update_lock);
308         data->wdog_state &= ~v;
309         fscpos_write_value(client, reg, v);
310         up(&data->update_lock);
311         return count;
312 }
313
314 static ssize_t show_wdog_preset(struct fscpos_data *data, char *buf)
315 {
316         return sprintf(buf, "%u\n", data->wdog_preset);
317 }
318
319 static ssize_t set_wdog_preset(struct i2c_client *client, struct fscpos_data
320                                 *data, const char *buf, size_t count, int reg)
321 {
322         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
323
324         down(&data->update_lock);
325         data->wdog_preset = v;
326         fscpos_write_value(client, reg, data->wdog_preset);
327         up(&data->update_lock);
328         return count;
329 }
330
331 /* Event */
332 static ssize_t show_event(struct device *dev, struct device_attribute *attr, char *buf)
333 {
334         /* bits 5..7 reserved => mask with 0x1f */
335         struct fscpos_data *data = fscpos_update_device(dev);
336         return sprintf(buf, "%u\n", data->global_event & 0x9b);
337 }
338
339 /*
340  * Sysfs stuff
341  */
342 #define create_getter(kind, sub) \
343         static ssize_t sysfs_show_##kind##sub(struct device *dev, struct device_attribute *attr, char *buf) \
344         { \
345                 struct fscpos_data *data = fscpos_update_device(dev); \
346                 return show_##kind##sub(data, buf); \
347         }
348
349 #define create_getter_n(kind, offset, sub) \
350         static ssize_t sysfs_show_##kind##offset##sub(struct device *dev, struct device_attribute *attr, char\
351                                                                         *buf) \
352         { \
353                 struct fscpos_data *data = fscpos_update_device(dev); \
354                 return show_##kind##sub(data, buf, offset); \
355         }
356
357 #define create_setter(kind, sub, reg) \
358         static ssize_t sysfs_set_##kind##sub (struct device *dev, struct device_attribute *attr, const char \
359                                                         *buf, size_t count) \
360         { \
361                 struct i2c_client *client = to_i2c_client(dev); \
362                 struct fscpos_data *data = i2c_get_clientdata(client); \
363                 return set_##kind##sub(client, data, buf, count, reg); \
364         }
365
366 #define create_setter_n(kind, offset, sub, reg) \
367         static ssize_t sysfs_set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, \
368                                         const char *buf, size_t count) \
369         { \
370                 struct i2c_client *client = to_i2c_client(dev); \
371                 struct fscpos_data *data = i2c_get_clientdata(client); \
372                 return set_##kind##sub(client, data, buf, count, offset, reg);\
373         }
374
375 #define create_sysfs_device_ro(kind, sub, offset) \
376         static DEVICE_ATTR(kind##offset##sub, S_IRUGO, \
377                                         sysfs_show_##kind##offset##sub, NULL);
378
379 #define create_sysfs_device_rw(kind, sub, offset) \
380         static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, \
381                 sysfs_show_##kind##offset##sub, sysfs_set_##kind##offset##sub);
382
383 #define sysfs_ro_n(kind, sub, offset) \
384         create_getter_n(kind, offset, sub); \
385         create_sysfs_device_ro(kind, sub, offset);
386
387 #define sysfs_rw_n(kind, sub, offset, reg) \
388         create_getter_n(kind, offset, sub); \
389         create_setter_n(kind, offset, sub, reg); \
390         create_sysfs_device_rw(kind, sub, offset);
391
392 #define sysfs_rw(kind, sub, reg) \
393         create_getter(kind, sub); \
394         create_setter(kind, sub, reg); \
395         create_sysfs_device_rw(kind, sub,);
396
397 #define sysfs_fan_with_min(offset, reg_status, reg_ripple, reg_min) \
398         sysfs_fan(offset, reg_status, reg_ripple); \
399         sysfs_rw_n(pwm,, offset, reg_min);
400
401 #define sysfs_fan(offset, reg_status, reg_ripple) \
402         sysfs_ro_n(fan, _input, offset); \
403         sysfs_ro_n(fan, _status, offset); \
404         sysfs_rw_n(fan, _ripple, offset, reg_ripple);
405
406 #define sysfs_temp(offset, reg_status) \
407         sysfs_ro_n(temp, _input, offset); \
408         sysfs_ro_n(temp, _status, offset); \
409         sysfs_rw_n(temp, _reset, offset, reg_status);
410
411 #define sysfs_watchdog(reg_wdog_preset, reg_wdog_state, reg_wdog_control) \
412         sysfs_rw(wdog, _control, reg_wdog_control); \
413         sysfs_rw(wdog, _preset, reg_wdog_preset); \
414         sysfs_rw(wdog, _state, reg_wdog_state);
415
416 sysfs_fan_with_min(1, FSCPOS_REG_FAN_STATE[0], FSCPOS_REG_FAN_RIPPLE[0],
417                                                         FSCPOS_REG_PWM[0]);
418 sysfs_fan_with_min(2, FSCPOS_REG_FAN_STATE[1], FSCPOS_REG_FAN_RIPPLE[1],
419                                                         FSCPOS_REG_PWM[1]);
420 sysfs_fan(3, FSCPOS_REG_FAN_STATE[2], FSCPOS_REG_FAN_RIPPLE[2]);
421
422 sysfs_temp(1, FSCPOS_REG_TEMP_STATE[0]);
423 sysfs_temp(2, FSCPOS_REG_TEMP_STATE[1]);
424 sysfs_temp(3, FSCPOS_REG_TEMP_STATE[2]);
425
426 sysfs_watchdog(FSCPOS_REG_WDOG_PRESET, FSCPOS_REG_WDOG_STATE,
427                                                 FSCPOS_REG_WDOG_CONTROL);
428
429 static DEVICE_ATTR(event, S_IRUGO, show_event, NULL);
430 static DEVICE_ATTR(in0_input, S_IRUGO, show_volt_12, NULL);
431 static DEVICE_ATTR(in1_input, S_IRUGO, show_volt_5, NULL);
432 static DEVICE_ATTR(in2_input, S_IRUGO, show_volt_batt, NULL);
433
434 static int fscpos_attach_adapter(struct i2c_adapter *adapter)
435 {
436         if (!(adapter->class & I2C_CLASS_HWMON))
437                 return 0;
438         return i2c_probe(adapter, &addr_data, fscpos_detect);
439 }
440
441 static int fscpos_detect(struct i2c_adapter *adapter, int address, int kind)
442 {
443         struct i2c_client *new_client;
444         struct fscpos_data *data;
445         int err = 0;
446
447         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
448                 goto exit;
449
450         /*
451          * OK. For now, we presume we have a valid client. We now create the
452          * client structure, even though we cannot fill it completely yet.
453          * But it allows us to access fscpos_{read,write}_value.
454          */
455
456         if (!(data = kzalloc(sizeof(struct fscpos_data), GFP_KERNEL))) {
457                 err = -ENOMEM;
458                 goto exit;
459         }
460
461         new_client = &data->client;
462         i2c_set_clientdata(new_client, data);
463         new_client->addr = address;
464         new_client->adapter = adapter;
465         new_client->driver = &fscpos_driver;
466         new_client->flags = 0;
467
468         /* Do the remaining detection unless force or force_fscpos parameter */
469         if (kind < 0) {
470                 if ((fscpos_read_value(new_client, FSCPOS_REG_IDENT_0)
471                         != 0x50) /* 'P' */
472                 || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_1)
473                         != 0x45) /* 'E' */
474                 || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_2)
475                         != 0x47))/* 'G' */
476                 {
477                         dev_dbg(&new_client->dev, "fscpos detection failed\n");
478                         goto exit_free;
479                 }
480         }
481
482         /* Fill in the remaining client fields and put it in the global list */
483         strlcpy(new_client->name, "fscpos", I2C_NAME_SIZE);
484
485         data->valid = 0;
486         init_MUTEX(&data->update_lock);
487
488         /* Tell the I2C layer a new client has arrived */
489         if ((err = i2c_attach_client(new_client)))
490                 goto exit_free;
491
492         /* Inizialize the fscpos chip */
493         fscpos_init_client(new_client);
494
495         /* Announce that the chip was found */
496         dev_info(&new_client->dev, "Found fscpos chip, rev %u\n", data->revision);
497
498         /* Register sysfs hooks */
499         data->class_dev = hwmon_device_register(&new_client->dev);
500         if (IS_ERR(data->class_dev)) {
501                 err = PTR_ERR(data->class_dev);
502                 goto exit_detach;
503         }
504
505         device_create_file(&new_client->dev, &dev_attr_event);
506         device_create_file(&new_client->dev, &dev_attr_in0_input);
507         device_create_file(&new_client->dev, &dev_attr_in1_input);
508         device_create_file(&new_client->dev, &dev_attr_in2_input);
509         device_create_file(&new_client->dev, &dev_attr_wdog_control);
510         device_create_file(&new_client->dev, &dev_attr_wdog_preset);
511         device_create_file(&new_client->dev, &dev_attr_wdog_state);
512         device_create_file(&new_client->dev, &dev_attr_temp1_input);
513         device_create_file(&new_client->dev, &dev_attr_temp1_status);
514         device_create_file(&new_client->dev, &dev_attr_temp1_reset);
515         device_create_file(&new_client->dev, &dev_attr_temp2_input);
516         device_create_file(&new_client->dev, &dev_attr_temp2_status);
517         device_create_file(&new_client->dev, &dev_attr_temp2_reset);
518         device_create_file(&new_client->dev, &dev_attr_temp3_input);
519         device_create_file(&new_client->dev, &dev_attr_temp3_status);
520         device_create_file(&new_client->dev, &dev_attr_temp3_reset);
521         device_create_file(&new_client->dev, &dev_attr_fan1_input);
522         device_create_file(&new_client->dev, &dev_attr_fan1_status);
523         device_create_file(&new_client->dev, &dev_attr_fan1_ripple);
524         device_create_file(&new_client->dev, &dev_attr_pwm1);
525         device_create_file(&new_client->dev, &dev_attr_fan2_input);
526         device_create_file(&new_client->dev, &dev_attr_fan2_status);
527         device_create_file(&new_client->dev, &dev_attr_fan2_ripple);
528         device_create_file(&new_client->dev, &dev_attr_pwm2);
529         device_create_file(&new_client->dev, &dev_attr_fan3_input);
530         device_create_file(&new_client->dev, &dev_attr_fan3_status);
531         device_create_file(&new_client->dev, &dev_attr_fan3_ripple);
532
533         return 0;
534
535 exit_detach:
536         i2c_detach_client(new_client);
537 exit_free:
538         kfree(data);
539 exit:
540         return err;
541 }
542
543 static int fscpos_detach_client(struct i2c_client *client)
544 {
545         struct fscpos_data *data = i2c_get_clientdata(client);
546         int err;
547
548         hwmon_device_unregister(data->class_dev);
549
550         if ((err = i2c_detach_client(client)))
551                 return err;
552         kfree(data);
553         return 0;
554 }
555
556 static int fscpos_read_value(struct i2c_client *client, u8 reg)
557 {
558         dev_dbg(&client->dev, "Read reg 0x%02x\n", reg);
559         return i2c_smbus_read_byte_data(client, reg);
560 }
561
562 static int fscpos_write_value(struct i2c_client *client, u8 reg, u8 value)
563 {
564         dev_dbg(&client->dev, "Write reg 0x%02x, val 0x%02x\n", reg, value);
565         return i2c_smbus_write_byte_data(client, reg, value);
566 }
567
568 /* Called when we have found a new FSCPOS chip */
569 static void fscpos_init_client(struct i2c_client *client)
570 {
571         struct fscpos_data *data = i2c_get_clientdata(client);
572
573         /* read revision from chip */
574         data->revision = fscpos_read_value(client, FSCPOS_REG_REVISION);
575 }
576
577 static struct fscpos_data *fscpos_update_device(struct device *dev)
578 {
579         struct i2c_client *client = to_i2c_client(dev);
580         struct fscpos_data *data = i2c_get_clientdata(client);
581
582         down(&data->update_lock);
583
584         if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
585                 int i;
586
587                 dev_dbg(&client->dev, "Starting fscpos update\n");
588
589                 for (i = 0; i < 3; i++) {
590                         data->temp_act[i] = fscpos_read_value(client,
591                                                 FSCPOS_REG_TEMP_ACT[i]);
592                         data->temp_status[i] = fscpos_read_value(client,
593                                                 FSCPOS_REG_TEMP_STATE[i]);
594                         data->fan_act[i] = fscpos_read_value(client,
595                                                 FSCPOS_REG_FAN_ACT[i]);
596                         data->fan_status[i] = fscpos_read_value(client,
597                                                 FSCPOS_REG_FAN_STATE[i]);
598                         data->fan_ripple[i] = fscpos_read_value(client,
599                                                 FSCPOS_REG_FAN_RIPPLE[i]);
600                         if (i < 2) {
601                                 /* fan2_min is not supported by the chip */
602                                 data->pwm[i] = fscpos_read_value(client,
603                                                         FSCPOS_REG_PWM[i]);
604                         }
605                         /* reset fan status if speed is back to > 0 */
606                         if (data->fan_status[i] != 0 && data->fan_act[i] > 0) {
607                                 reset_fan_alarm(client, i);
608                         }
609                 }
610
611                 data->volt[0] = fscpos_read_value(client, FSCPOS_REG_VOLT_12);
612                 data->volt[1] = fscpos_read_value(client, FSCPOS_REG_VOLT_5);
613                 data->volt[2] = fscpos_read_value(client, FSCPOS_REG_VOLT_BATT);
614
615                 data->wdog_preset = fscpos_read_value(client,
616                                                         FSCPOS_REG_WDOG_PRESET);
617                 data->wdog_state = fscpos_read_value(client,
618                                                         FSCPOS_REG_WDOG_STATE);
619                 data->wdog_control = fscpos_read_value(client,
620                                                 FSCPOS_REG_WDOG_CONTROL);
621
622                 data->global_event = fscpos_read_value(client,
623                                                 FSCPOS_REG_EVENT_STATE);
624
625                 data->last_updated = jiffies;
626                 data->valid = 1;
627         }
628         up(&data->update_lock);
629         return data;
630 }
631
632 static int __init sm_fscpos_init(void)
633 {
634         return i2c_add_driver(&fscpos_driver);
635 }
636
637 static void __exit sm_fscpos_exit(void)
638 {
639         i2c_del_driver(&fscpos_driver);
640 }
641
642 MODULE_AUTHOR("Stefan Ott <stefan@desire.ch> based on work from Hermann Jung "
643                                 "<hej@odn.de>, Frodo Looijaard <frodol@dds.nl>"
644                                 " and Philip Edelbrock <phil@netroedge.com>");
645 MODULE_DESCRIPTION("fujitsu siemens poseidon chip driver");
646 MODULE_LICENSE("GPL");
647
648 module_init(sm_fscpos_init);
649 module_exit(sm_fscpos_exit);