1 /*
2 * fscher.c - Part of lm_sensors, Linux kernel modules for hardware
3 * monitoring
4 * Copyright (C) 2003, 2004 Reinhard Nissl <rnissl@gmx.de>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21 /*
22 * fujitsu siemens hermes chip,
23 * module based on fscpos.c
24 * Copyright (C) 2000 Hermann Jung <hej@odn.de>
25 * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
26 * and Philip Edelbrock <phil@netroedge.com>
27 */
28
29 #include <linux/module.h>
30 #include <linux/init.h>
31 #include <linux/slab.h>
32 #include <linux/jiffies.h>
33 #include <linux/i2c.h>
34 #include <linux/hwmon.h>
35 #include <linux/err.h>
36 #include <linux/mutex.h>
37 #include <linux/sysfs.h>
38
39 /*
40 * Addresses to scan
41 */
42
43 static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
44
45 /*
46 * Insmod parameters
47 */
48
49 I2C_CLIENT_INSMOD_1(fscher);
50
51 /*
52 * The FSCHER registers
53 */
54
55 /* chip identification */
56 #define FSCHER_REG_IDENT_0 0x00
57 #define FSCHER_REG_IDENT_1 0x01
58 #define FSCHER_REG_IDENT_2 0x02
59 #define FSCHER_REG_REVISION 0x03
60
61 /* global control and status */
62 #define FSCHER_REG_EVENT_STATE 0x04
63 #define FSCHER_REG_CONTROL 0x05
64
65 /* watchdog */
66 #define FSCHER_REG_WDOG_PRESET 0x28
67 #define FSCHER_REG_WDOG_STATE 0x23
68 #define FSCHER_REG_WDOG_CONTROL 0x21
69
70 /* fan 0 */
71 #define FSCHER_REG_FAN0_MIN 0x55
72 #define FSCHER_REG_FAN0_ACT 0x0e
73 #define FSCHER_REG_FAN0_STATE 0x0d
74 #define FSCHER_REG_FAN0_RIPPLE 0x0f
75
76 /* fan 1 */
77 #define FSCHER_REG_FAN1_MIN 0x65
78 #define FSCHER_REG_FAN1_ACT 0x6b
79 #define FSCHER_REG_FAN1_STATE 0x62
80 #define FSCHER_REG_FAN1_RIPPLE 0x6f
81
82 /* fan 2 */
83 #define FSCHER_REG_FAN2_MIN 0xb5
84 #define FSCHER_REG_FAN2_ACT 0xbb
85 #define FSCHER_REG_FAN2_STATE 0xb2
86 #define FSCHER_REG_FAN2_RIPPLE 0xbf
87
88 /* voltage supervision */
89 #define FSCHER_REG_VOLT_12 0x45
90 #define FSCHER_REG_VOLT_5 0x42
91 #define FSCHER_REG_VOLT_BATT 0x48
92
93 /* temperature 0 */
94 #define FSCHER_REG_TEMP0_ACT 0x64
95 #define FSCHER_REG_TEMP0_STATE 0x71
96
97 /* temperature 1 */
98 #define FSCHER_REG_TEMP1_ACT 0x32
99 #define FSCHER_REG_TEMP1_STATE 0x81
100
101 /* temperature 2 */
102 #define FSCHER_REG_TEMP2_ACT 0x35
103 #define FSCHER_REG_TEMP2_STATE 0x91
104
105 /*
106 * Functions declaration
107 */
108
109 static int fscher_probe(struct i2c_client *client,
110 const struct i2c_device_id *id);
111 static int fscher_detect(struct i2c_client *client, int kind,
112 struct i2c_board_info *info);
113 static int fscher_remove(struct i2c_client *client);
114 static struct fscher_data *fscher_update_device(struct device *dev);
115 static void fscher_init_client(struct i2c_client *client);
116
117 static int fscher_read_value(struct i2c_client *client, u8 reg);
118 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value);
119
120 /*
121 * Driver data (common to all clients)
122 */
123
124 static const struct i2c_device_id fscher_id[] = {
125 { "fscher", fscher },
126 { }
127 };
128
129 static struct i2c_driver fscher_driver = {
130 .class = I2C_CLASS_HWMON,
131 .driver = {
132 .name = "fscher",
133 },
134 .probe = fscher_probe,
135 .remove = fscher_remove,
136 .id_table = fscher_id,
137 .detect = fscher_detect,
138 .address_data = &addr_data,
139 };
140
141 /*
142 * Client data (each client gets its own)
143 */
144
145 struct fscher_data {
146 struct device *hwmon_dev;
147 struct mutex update_lock;
148 char valid; /* zero until following fields are valid */
149 unsigned long last_updated; /* in jiffies */
150
151 /* register values */
152 u8 revision; /* revision of chip */
153 u8 global_event; /* global event status */
154 u8 global_control; /* global control register */
155 u8 watchdog[3]; /* watchdog */
156 u8 volt[3]; /* 12, 5, battery voltage */
157 u8 temp_act[3]; /* temperature */
158 u8 temp_status[3]; /* status of sensor */
159 u8 fan_act[3]; /* fans revolutions per second */
160 u8 fan_status[3]; /* fan status */
161 u8 fan_min[3]; /* fan min value for rps */
162 u8 fan_ripple[3]; /* divider for rps */
163 };
164
165 /*
166 * Sysfs stuff
167 */
168
169 #define sysfs_r(kind, sub, offset, reg) \
170 static ssize_t show_##kind##sub (struct fscher_data *, char *, int); \
171 static ssize_t show_##kind##offset##sub (struct device *, struct device_attribute *attr, char *); \
172 static ssize_t show_##kind##offset##sub (struct device *dev, struct device_attribute *attr, char *buf) \
173 { \
174 struct fscher_data *data = fscher_update_device(dev); \
175 return show_##kind##sub(data, buf, (offset)); \
176 }
177
178 #define sysfs_w(kind, sub, offset, reg) \
179 static ssize_t set_##kind##sub (struct i2c_client *, struct fscher_data *, const char *, size_t, int, int); \
180 static ssize_t set_##kind##offset##sub (struct device *, struct device_attribute *attr, const char *, size_t); \
181 static ssize_t set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
182 { \
183 struct i2c_client *client = to_i2c_client(dev); \
184 struct fscher_data *data = i2c_get_clientdata(client); \
185 return set_##kind##sub(client, data, buf, count, (offset), reg); \
186 }
187
188 #define sysfs_rw_n(kind, sub, offset, reg) \
189 sysfs_r(kind, sub, offset, reg) \
190 sysfs_w(kind, sub, offset, reg) \
191 static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, show_##kind##offset##sub, set_##kind##offset##sub);
192
193 #define sysfs_rw(kind, sub, reg) \
194 sysfs_r(kind, sub, 0, reg) \
195 sysfs_w(kind, sub, 0, reg) \
196 static DEVICE_ATTR(kind##sub, S_IRUGO | S_IWUSR, show_##kind##0##sub, set_##kind##0##sub);
197
198 #define sysfs_ro_n(kind, sub, offset, reg) \
199 sysfs_r(kind, sub, offset, reg) \
200 static DEVICE_ATTR(kind##offset##sub, S_IRUGO, show_##kind##offset##sub, NULL);
201
202 #define sysfs_ro(kind, sub, reg) \
203 sysfs_r(kind, sub, 0, reg) \
204 static DEVICE_ATTR(kind, S_IRUGO, show_##kind##0##sub, NULL);
205
206 #define sysfs_fan(offset, reg_status, reg_min, reg_ripple, reg_act) \
207 sysfs_rw_n(pwm, , offset, reg_min) \
208 sysfs_rw_n(fan, _status, offset, reg_status) \
209 sysfs_rw_n(fan, _div , offset, reg_ripple) \
210 sysfs_ro_n(fan, _input , offset, reg_act)
211
212 #define sysfs_temp(offset, reg_status, reg_act) \
213 sysfs_rw_n(temp, _status, offset, reg_status) \
214 sysfs_ro_n(temp, _input , offset, reg_act)
215
216 #define sysfs_in(offset, reg_act) \
217 sysfs_ro_n(in, _input, offset, reg_act)
218
219 #define sysfs_revision(reg_revision) \
220 sysfs_ro(revision, , reg_revision)
221
222 #define sysfs_alarms(reg_events) \
223 sysfs_ro(alarms, , reg_events)
224
225 #define sysfs_control(reg_control) \
226 sysfs_rw(control, , reg_control)
227
228 #define sysfs_watchdog(reg_control, reg_status, reg_preset) \
229 sysfs_rw(watchdog, _control, reg_control) \
230 sysfs_rw(watchdog, _status , reg_status) \
231 sysfs_rw(watchdog, _preset , reg_preset)
232
233 sysfs_fan(1, FSCHER_REG_FAN0_STATE, FSCHER_REG_FAN0_MIN,
234 FSCHER_REG_FAN0_RIPPLE, FSCHER_REG_FAN0_ACT)
235 sysfs_fan(2, FSCHER_REG_FAN1_STATE, FSCHER_REG_FAN1_MIN,
236 FSCHER_REG_FAN1_RIPPLE, FSCHER_REG_FAN1_ACT)
237 sysfs_fan(3, FSCHER_REG_FAN2_STATE, FSCHER_REG_FAN2_MIN,
238 FSCHER_REG_FAN2_RIPPLE, FSCHER_REG_FAN2_ACT)
239
240 sysfs_temp(1, FSCHER_REG_TEMP0_STATE, FSCHER_REG_TEMP0_ACT)
241 sysfs_temp(2, FSCHER_REG_TEMP1_STATE, FSCHER_REG_TEMP1_ACT)
242 sysfs_temp(3, FSCHER_REG_TEMP2_STATE, FSCHER_REG_TEMP2_ACT)
243
244 sysfs_in(0, FSCHER_REG_VOLT_12)
245 sysfs_in(1, FSCHER_REG_VOLT_5)
246 sysfs_in(2, FSCHER_REG_VOLT_BATT)
247
248 sysfs_revision(FSCHER_REG_REVISION)
249 sysfs_alarms(FSCHER_REG_EVENTS)
250 sysfs_control(FSCHER_REG_CONTROL)
251 sysfs_watchdog(FSCHER_REG_WDOG_CONTROL, FSCHER_REG_WDOG_STATE, FSCHER_REG_WDOG_PRESET)
252
253 static struct attribute *fscher_attributes[] = {
254 &dev_attr_revision.attr,
255 &dev_attr_alarms.attr,
256 &dev_attr_control.attr,
257
258 &dev_attr_watchdog_status.attr,
259 &dev_attr_watchdog_control.attr,
260 &dev_attr_watchdog_preset.attr,
261
262 &dev_attr_in0_input.attr,
263 &dev_attr_in1_input.attr,
264 &dev_attr_in2_input.attr,
265
266 &dev_attr_fan1_status.attr,
267 &dev_attr_fan1_div.attr,
268 &dev_attr_fan1_input.attr,
269 &dev_attr_pwm1.attr,
270 &dev_attr_fan2_status.attr,
271 &dev_attr_fan2_div.attr,
272 &dev_attr_fan2_input.attr,
273 &dev_attr_pwm2.attr,
274 &dev_attr_fan3_status.attr,
275 &dev_attr_fan3_div.attr,
276 &dev_attr_fan3_input.attr,
277 &dev_attr_pwm3.attr,
278
279 &dev_attr_temp1_status.attr,
280 &dev_attr_temp1_input.attr,
281 &dev_attr_temp2_status.attr,
282 &dev_attr_temp2_input.attr,
283 &dev_attr_temp3_status.attr,
284 &dev_attr_temp3_input.attr,
285 NULL
286 };
287
288 static const struct attribute_group fscher_group = {
289 .attrs = fscher_attributes,
290 };
291
292 /*
293 * Real code
294 */
295
296 /* Return 0 if detection is successful, -ENODEV otherwise */
fscher_detect(struct i2c_client * new_client,int kind,struct i2c_board_info * info)297 static int fscher_detect(struct i2c_client *new_client, int kind,
298 struct i2c_board_info *info)
299 {
300 struct i2c_adapter *adapter = new_client->adapter;
301
302 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
303 return -ENODEV;
304
305 /* Do the remaining detection unless force or force_fscher parameter */
306 if (kind < 0) {
307 if ((i2c_smbus_read_byte_data(new_client,
308 FSCHER_REG_IDENT_0) != 0x48) /* 'H' */
309 || (i2c_smbus_read_byte_data(new_client,
310 FSCHER_REG_IDENT_1) != 0x45) /* 'E' */
311 || (i2c_smbus_read_byte_data(new_client,
312 FSCHER_REG_IDENT_2) != 0x52)) /* 'R' */
313 return -ENODEV;
314 }
315
316 strlcpy(info->type, "fscher", I2C_NAME_SIZE);
317
318 return 0;
319 }
320
fscher_probe(struct i2c_client * new_client,const struct i2c_device_id * id)321 static int fscher_probe(struct i2c_client *new_client,
322 const struct i2c_device_id *id)
323 {
324 struct fscher_data *data;
325 int err;
326
327 data = kzalloc(sizeof(struct fscher_data), GFP_KERNEL);
328 if (!data) {
329 err = -ENOMEM;
330 goto exit;
331 }
332
333 i2c_set_clientdata(new_client, data);
334 data->valid = 0;
335 mutex_init(&data->update_lock);
336
337 fscher_init_client(new_client);
338
339 /* Register sysfs hooks */
340 if ((err = sysfs_create_group(&new_client->dev.kobj, &fscher_group)))
341 goto exit_free;
342
343 data->hwmon_dev = hwmon_device_register(&new_client->dev);
344 if (IS_ERR(data->hwmon_dev)) {
345 err = PTR_ERR(data->hwmon_dev);
346 goto exit_remove_files;
347 }
348
349 return 0;
350
351 exit_remove_files:
352 sysfs_remove_group(&new_client->dev.kobj, &fscher_group);
353 exit_free:
354 kfree(data);
355 exit:
356 return err;
357 }
358
fscher_remove(struct i2c_client * client)359 static int fscher_remove(struct i2c_client *client)
360 {
361 struct fscher_data *data = i2c_get_clientdata(client);
362
363 hwmon_device_unregister(data->hwmon_dev);
364 sysfs_remove_group(&client->dev.kobj, &fscher_group);
365
366 kfree(data);
367 return 0;
368 }
369
fscher_read_value(struct i2c_client * client,u8 reg)370 static int fscher_read_value(struct i2c_client *client, u8 reg)
371 {
372 dev_dbg(&client->dev, "read reg 0x%02x\n", reg);
373
374 return i2c_smbus_read_byte_data(client, reg);
375 }
376
fscher_write_value(struct i2c_client * client,u8 reg,u8 value)377 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value)
378 {
379 dev_dbg(&client->dev, "write reg 0x%02x, val 0x%02x\n",
380 reg, value);
381
382 return i2c_smbus_write_byte_data(client, reg, value);
383 }
384
385 /* Called when we have found a new FSC Hermes. */
fscher_init_client(struct i2c_client * client)386 static void fscher_init_client(struct i2c_client *client)
387 {
388 struct fscher_data *data = i2c_get_clientdata(client);
389
390 /* Read revision from chip */
391 data->revision = fscher_read_value(client, FSCHER_REG_REVISION);
392 }
393
fscher_update_device(struct device * dev)394 static struct fscher_data *fscher_update_device(struct device *dev)
395 {
396 struct i2c_client *client = to_i2c_client(dev);
397 struct fscher_data *data = i2c_get_clientdata(client);
398
399 mutex_lock(&data->update_lock);
400
401 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
402
403 dev_dbg(&client->dev, "Starting fscher update\n");
404
405 data->temp_act[0] = fscher_read_value(client, FSCHER_REG_TEMP0_ACT);
406 data->temp_act[1] = fscher_read_value(client, FSCHER_REG_TEMP1_ACT);
407 data->temp_act[2] = fscher_read_value(client, FSCHER_REG_TEMP2_ACT);
408 data->temp_status[0] = fscher_read_value(client, FSCHER_REG_TEMP0_STATE);
409 data->temp_status[1] = fscher_read_value(client, FSCHER_REG_TEMP1_STATE);
410 data->temp_status[2] = fscher_read_value(client, FSCHER_REG_TEMP2_STATE);
411
412 data->volt[0] = fscher_read_value(client, FSCHER_REG_VOLT_12);
413 data->volt[1] = fscher_read_value(client, FSCHER_REG_VOLT_5);
414 data->volt[2] = fscher_read_value(client, FSCHER_REG_VOLT_BATT);
415
416 data->fan_act[0] = fscher_read_value(client, FSCHER_REG_FAN0_ACT);
417 data->fan_act[1] = fscher_read_value(client, FSCHER_REG_FAN1_ACT);
418 data->fan_act[2] = fscher_read_value(client, FSCHER_REG_FAN2_ACT);
419 data->fan_status[0] = fscher_read_value(client, FSCHER_REG_FAN0_STATE);
420 data->fan_status[1] = fscher_read_value(client, FSCHER_REG_FAN1_STATE);
421 data->fan_status[2] = fscher_read_value(client, FSCHER_REG_FAN2_STATE);
422 data->fan_min[0] = fscher_read_value(client, FSCHER_REG_FAN0_MIN);
423 data->fan_min[1] = fscher_read_value(client, FSCHER_REG_FAN1_MIN);
424 data->fan_min[2] = fscher_read_value(client, FSCHER_REG_FAN2_MIN);
425 data->fan_ripple[0] = fscher_read_value(client, FSCHER_REG_FAN0_RIPPLE);
426 data->fan_ripple[1] = fscher_read_value(client, FSCHER_REG_FAN1_RIPPLE);
427 data->fan_ripple[2] = fscher_read_value(client, FSCHER_REG_FAN2_RIPPLE);
428
429 data->watchdog[0] = fscher_read_value(client, FSCHER_REG_WDOG_PRESET);
430 data->watchdog[1] = fscher_read_value(client, FSCHER_REG_WDOG_STATE);
431 data->watchdog[2] = fscher_read_value(client, FSCHER_REG_WDOG_CONTROL);
432
433 data->global_event = fscher_read_value(client, FSCHER_REG_EVENT_STATE);
434 data->global_control = fscher_read_value(client,
435 FSCHER_REG_CONTROL);
436
437 data->last_updated = jiffies;
438 data->valid = 1;
439 }
440
441 mutex_unlock(&data->update_lock);
442
443 return data;
444 }
445
446
447
448 #define FAN_INDEX_FROM_NUM(nr) ((nr) - 1)
449
set_fan_status(struct i2c_client * client,struct fscher_data * data,const char * buf,size_t count,int nr,int reg)450 static ssize_t set_fan_status(struct i2c_client *client, struct fscher_data *data,
451 const char *buf, size_t count, int nr, int reg)
452 {
453 /* bits 0..1, 3..7 reserved => mask with 0x04 */
454 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x04;
455
456 mutex_lock(&data->update_lock);
457 data->fan_status[FAN_INDEX_FROM_NUM(nr)] &= ~v;
458 fscher_write_value(client, reg, v);
459 mutex_unlock(&data->update_lock);
460 return count;
461 }
462
show_fan_status(struct fscher_data * data,char * buf,int nr)463 static ssize_t show_fan_status(struct fscher_data *data, char *buf, int nr)
464 {
465 /* bits 0..1, 3..7 reserved => mask with 0x04 */
466 return sprintf(buf, "%u\n", data->fan_status[FAN_INDEX_FROM_NUM(nr)] & 0x04);
467 }
468
set_pwm(struct i2c_client * client,struct fscher_data * data,const char * buf,size_t count,int nr,int reg)469 static ssize_t set_pwm(struct i2c_client *client, struct fscher_data *data,
470 const char *buf, size_t count, int nr, int reg)
471 {
472 unsigned long v = simple_strtoul(buf, NULL, 10);
473
474 mutex_lock(&data->update_lock);
475 data->fan_min[FAN_INDEX_FROM_NUM(nr)] = v > 0xff ? 0xff : v;
476 fscher_write_value(client, reg, data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
477 mutex_unlock(&data->update_lock);
478 return count;
479 }
480
show_pwm(struct fscher_data * data,char * buf,int nr)481 static ssize_t show_pwm(struct fscher_data *data, char *buf, int nr)
482 {
483 return sprintf(buf, "%u\n", data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
484 }
485
set_fan_div(struct i2c_client * client,struct fscher_data * data,const char * buf,size_t count,int nr,int reg)486 static ssize_t set_fan_div(struct i2c_client *client, struct fscher_data *data,
487 const char *buf, size_t count, int nr, int reg)
488 {
489 /* supported values: 2, 4, 8 */
490 unsigned long v = simple_strtoul(buf, NULL, 10);
491
492 switch (v) {
493 case 2: v = 1; break;
494 case 4: v = 2; break;
495 case 8: v = 3; break;
496 default:
497 dev_err(&client->dev, "fan_div value %ld not "
498 "supported. Choose one of 2, 4 or 8!\n", v);
499 return -EINVAL;
500 }
501
502 mutex_lock(&data->update_lock);
503
504 /* bits 2..7 reserved => mask with 0x03 */
505 data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] &= ~0x03;
506 data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] |= v;
507
508 fscher_write_value(client, reg, data->fan_ripple[FAN_INDEX_FROM_NUM(nr)]);
509 mutex_unlock(&data->update_lock);
510 return count;
511 }
512
show_fan_div(struct fscher_data * data,char * buf,int nr)513 static ssize_t show_fan_div(struct fscher_data *data, char *buf, int nr)
514 {
515 /* bits 2..7 reserved => mask with 0x03 */
516 return sprintf(buf, "%u\n", 1 << (data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] & 0x03));
517 }
518
519 #define RPM_FROM_REG(val) (val*60)
520
show_fan_input(struct fscher_data * data,char * buf,int nr)521 static ssize_t show_fan_input (struct fscher_data *data, char *buf, int nr)
522 {
523 return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[FAN_INDEX_FROM_NUM(nr)]));
524 }
525
526
527
528 #define TEMP_INDEX_FROM_NUM(nr) ((nr) - 1)
529
set_temp_status(struct i2c_client * client,struct fscher_data * data,const char * buf,size_t count,int nr,int reg)530 static ssize_t set_temp_status(struct i2c_client *client, struct fscher_data *data,
531 const char *buf, size_t count, int nr, int reg)
532 {
533 /* bits 2..7 reserved, 0 read only => mask with 0x02 */
534 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
535
536 mutex_lock(&data->update_lock);
537 data->temp_status[TEMP_INDEX_FROM_NUM(nr)] &= ~v;
538 fscher_write_value(client, reg, v);
539 mutex_unlock(&data->update_lock);
540 return count;
541 }
542
show_temp_status(struct fscher_data * data,char * buf,int nr)543 static ssize_t show_temp_status(struct fscher_data *data, char *buf, int nr)
544 {
545 /* bits 2..7 reserved => mask with 0x03 */
546 return sprintf(buf, "%u\n", data->temp_status[TEMP_INDEX_FROM_NUM(nr)] & 0x03);
547 }
548
549 #define TEMP_FROM_REG(val) (((val) - 128) * 1000)
550
show_temp_input(struct fscher_data * data,char * buf,int nr)551 static ssize_t show_temp_input(struct fscher_data *data, char *buf, int nr)
552 {
553 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[TEMP_INDEX_FROM_NUM(nr)]));
554 }
555
556 /*
557 * The final conversion is specified in sensors.conf, as it depends on
558 * mainboard specific values. We export the registers contents as
559 * pseudo-hundredths-of-Volts (range 0V - 2.55V). Not that it makes much
560 * sense per se, but it minimizes the conversions count and keeps the
561 * values within a usual range.
562 */
563 #define VOLT_FROM_REG(val) ((val) * 10)
564
show_in_input(struct fscher_data * data,char * buf,int nr)565 static ssize_t show_in_input(struct fscher_data *data, char *buf, int nr)
566 {
567 return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[nr]));
568 }
569
570
571
show_revision(struct fscher_data * data,char * buf,int nr)572 static ssize_t show_revision(struct fscher_data *data, char *buf, int nr)
573 {
574 return sprintf(buf, "%u\n", data->revision);
575 }
576
577
578
show_alarms(struct fscher_data * data,char * buf,int nr)579 static ssize_t show_alarms(struct fscher_data *data, char *buf, int nr)
580 {
581 /* bits 2, 5..6 reserved => mask with 0x9b */
582 return sprintf(buf, "%u\n", data->global_event & 0x9b);
583 }
584
585
586
set_control(struct i2c_client * client,struct fscher_data * data,const char * buf,size_t count,int nr,int reg)587 static ssize_t set_control(struct i2c_client *client, struct fscher_data *data,
588 const char *buf, size_t count, int nr, int reg)
589 {
590 /* bits 1..7 reserved => mask with 0x01 */
591 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x01;
592
593 mutex_lock(&data->update_lock);
594 data->global_control = v;
595 fscher_write_value(client, reg, v);
596 mutex_unlock(&data->update_lock);
597 return count;
598 }
599
show_control(struct fscher_data * data,char * buf,int nr)600 static ssize_t show_control(struct fscher_data *data, char *buf, int nr)
601 {
602 /* bits 1..7 reserved => mask with 0x01 */
603 return sprintf(buf, "%u\n", data->global_control & 0x01);
604 }
605
606
607
set_watchdog_control(struct i2c_client * client,struct fscher_data * data,const char * buf,size_t count,int nr,int reg)608 static ssize_t set_watchdog_control(struct i2c_client *client, struct
609 fscher_data *data, const char *buf, size_t count,
610 int nr, int reg)
611 {
612 /* bits 0..3 reserved => mask with 0xf0 */
613 unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
614
615 mutex_lock(&data->update_lock);
616 data->watchdog[2] &= ~0xf0;
617 data->watchdog[2] |= v;
618 fscher_write_value(client, reg, data->watchdog[2]);
619 mutex_unlock(&data->update_lock);
620 return count;
621 }
622
show_watchdog_control(struct fscher_data * data,char * buf,int nr)623 static ssize_t show_watchdog_control(struct fscher_data *data, char *buf, int nr)
624 {
625 /* bits 0..3 reserved, bit 5 write only => mask with 0xd0 */
626 return sprintf(buf, "%u\n", data->watchdog[2] & 0xd0);
627 }
628
set_watchdog_status(struct i2c_client * client,struct fscher_data * data,const char * buf,size_t count,int nr,int reg)629 static ssize_t set_watchdog_status(struct i2c_client *client, struct fscher_data *data,
630 const char *buf, size_t count, int nr, int reg)
631 {
632 /* bits 0, 2..7 reserved => mask with 0x02 */
633 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
634
635 mutex_lock(&data->update_lock);
636 data->watchdog[1] &= ~v;
637 fscher_write_value(client, reg, v);
638 mutex_unlock(&data->update_lock);
639 return count;
640 }
641
show_watchdog_status(struct fscher_data * data,char * buf,int nr)642 static ssize_t show_watchdog_status(struct fscher_data *data, char *buf, int nr)
643 {
644 /* bits 0, 2..7 reserved => mask with 0x02 */
645 return sprintf(buf, "%u\n", data->watchdog[1] & 0x02);
646 }
647
set_watchdog_preset(struct i2c_client * client,struct fscher_data * data,const char * buf,size_t count,int nr,int reg)648 static ssize_t set_watchdog_preset(struct i2c_client *client, struct fscher_data *data,
649 const char *buf, size_t count, int nr, int reg)
650 {
651 unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
652
653 mutex_lock(&data->update_lock);
654 data->watchdog[0] = v;
655 fscher_write_value(client, reg, data->watchdog[0]);
656 mutex_unlock(&data->update_lock);
657 return count;
658 }
659
show_watchdog_preset(struct fscher_data * data,char * buf,int nr)660 static ssize_t show_watchdog_preset(struct fscher_data *data, char *buf, int nr)
661 {
662 return sprintf(buf, "%u\n", data->watchdog[0]);
663 }
664
sensors_fscher_init(void)665 static int __init sensors_fscher_init(void)
666 {
667 return i2c_add_driver(&fscher_driver);
668 }
669
sensors_fscher_exit(void)670 static void __exit sensors_fscher_exit(void)
671 {
672 i2c_del_driver(&fscher_driver);
673 }
674
675 MODULE_AUTHOR("Reinhard Nissl <rnissl@gmx.de>");
676 MODULE_DESCRIPTION("FSC Hermes driver");
677 MODULE_LICENSE("GPL");
678
679 module_init(sensors_fscher_init);
680 module_exit(sensors_fscher_exit);
681