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
38 /*
39 * Addresses to scan
40 */
41
42 static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
43
44 /*
45 * Insmod parameters
46 */
47
48 I2C_CLIENT_INSMOD_1(fscher);
49
50 /*
51 * The FSCHER registers
52 */
53
54 /* chip identification */
55 #define FSCHER_REG_IDENT_0 0x00
56 #define FSCHER_REG_IDENT_1 0x01
57 #define FSCHER_REG_IDENT_2 0x02
58 #define FSCHER_REG_REVISION 0x03
59
60 /* global control and status */
61 #define FSCHER_REG_EVENT_STATE 0x04
62 #define FSCHER_REG_CONTROL 0x05
63
64 /* watchdog */
65 #define FSCHER_REG_WDOG_PRESET 0x28
66 #define FSCHER_REG_WDOG_STATE 0x23
67 #define FSCHER_REG_WDOG_CONTROL 0x21
68
69 /* fan 0 */
70 #define FSCHER_REG_FAN0_MIN 0x55
71 #define FSCHER_REG_FAN0_ACT 0x0e
72 #define FSCHER_REG_FAN0_STATE 0x0d
73 #define FSCHER_REG_FAN0_RIPPLE 0x0f
74
75 /* fan 1 */
76 #define FSCHER_REG_FAN1_MIN 0x65
77 #define FSCHER_REG_FAN1_ACT 0x6b
78 #define FSCHER_REG_FAN1_STATE 0x62
79 #define FSCHER_REG_FAN1_RIPPLE 0x6f
80
81 /* fan 2 */
82 #define FSCHER_REG_FAN2_MIN 0xb5
83 #define FSCHER_REG_FAN2_ACT 0xbb
84 #define FSCHER_REG_FAN2_STATE 0xb2
85 #define FSCHER_REG_FAN2_RIPPLE 0xbf
86
87 /* voltage supervision */
88 #define FSCHER_REG_VOLT_12 0x45
89 #define FSCHER_REG_VOLT_5 0x42
90 #define FSCHER_REG_VOLT_BATT 0x48
91
92 /* temperature 0 */
93 #define FSCHER_REG_TEMP0_ACT 0x64
94 #define FSCHER_REG_TEMP0_STATE 0x71
95
96 /* temperature 1 */
97 #define FSCHER_REG_TEMP1_ACT 0x32
98 #define FSCHER_REG_TEMP1_STATE 0x81
99
100 /* temperature 2 */
101 #define FSCHER_REG_TEMP2_ACT 0x35
102 #define FSCHER_REG_TEMP2_STATE 0x91
103
104 /*
105 * Functions declaration
106 */
107
108 static int fscher_attach_adapter(struct i2c_adapter *adapter);
109 static int fscher_detect(struct i2c_adapter *adapter, int address, int kind);
110 static int fscher_detach_client(struct i2c_client *client);
111 static struct fscher_data *fscher_update_device(struct device *dev);
112 static void fscher_init_client(struct i2c_client *client);
113
114 static int fscher_read_value(struct i2c_client *client, u8 reg);
115 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value);
116
117 /*
118 * Driver data (common to all clients)
119 */
120
121 static struct i2c_driver fscher_driver = {
122 .driver = {
123 .name = "fscher",
124 },
125 .id = I2C_DRIVERID_FSCHER,
126 .attach_adapter = fscher_attach_adapter,
127 .detach_client = fscher_detach_client,
128 };
129
130 /*
131 * Client data (each client gets its own)
132 */
133
134 struct fscher_data {
135 struct i2c_client client;
136 struct class_device *class_dev;
137 struct mutex update_lock;
138 char valid; /* zero until following fields are valid */
139 unsigned long last_updated; /* in jiffies */
140
141 /* register values */
142 u8 revision; /* revision of chip */
143 u8 global_event; /* global event status */
144 u8 global_control; /* global control register */
145 u8 watchdog[3]; /* watchdog */
146 u8 volt[3]; /* 12, 5, battery voltage */
147 u8 temp_act[3]; /* temperature */
148 u8 temp_status[3]; /* status of sensor */
149 u8 fan_act[3]; /* fans revolutions per second */
150 u8 fan_status[3]; /* fan status */
151 u8 fan_min[3]; /* fan min value for rps */
152 u8 fan_ripple[3]; /* divider for rps */
153 };
154
155 /*
156 * Sysfs stuff
157 */
158
159 #define sysfs_r(kind, sub, offset, reg) \
160 static ssize_t show_##kind##sub (struct fscher_data *, char *, int); \
161 static ssize_t show_##kind##offset##sub (struct device *, struct device_attribute *attr, char *); \
162 static ssize_t show_##kind##offset##sub (struct device *dev, struct device_attribute *attr, char *buf) \
163 { \
164 struct fscher_data *data = fscher_update_device(dev); \
165 return show_##kind##sub(data, buf, (offset)); \
166 }
167
168 #define sysfs_w(kind, sub, offset, reg) \
169 static ssize_t set_##kind##sub (struct i2c_client *, struct fscher_data *, const char *, size_t, int, int); \
170 static ssize_t set_##kind##offset##sub (struct device *, struct device_attribute *attr, const char *, size_t); \
171 static ssize_t set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
172 { \
173 struct i2c_client *client = to_i2c_client(dev); \
174 struct fscher_data *data = i2c_get_clientdata(client); \
175 return set_##kind##sub(client, data, buf, count, (offset), reg); \
176 }
177
178 #define sysfs_rw_n(kind, sub, offset, reg) \
179 sysfs_r(kind, sub, offset, reg) \
180 sysfs_w(kind, sub, offset, reg) \
181 static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, show_##kind##offset##sub, set_##kind##offset##sub);
182
183 #define sysfs_rw(kind, sub, reg) \
184 sysfs_r(kind, sub, 0, reg) \
185 sysfs_w(kind, sub, 0, reg) \
186 static DEVICE_ATTR(kind##sub, S_IRUGO | S_IWUSR, show_##kind##0##sub, set_##kind##0##sub);
187
188 #define sysfs_ro_n(kind, sub, offset, reg) \
189 sysfs_r(kind, sub, offset, reg) \
190 static DEVICE_ATTR(kind##offset##sub, S_IRUGO, show_##kind##offset##sub, NULL);
191
192 #define sysfs_ro(kind, sub, reg) \
193 sysfs_r(kind, sub, 0, reg) \
194 static DEVICE_ATTR(kind, S_IRUGO, show_##kind##0##sub, NULL);
195
196 #define sysfs_fan(offset, reg_status, reg_min, reg_ripple, reg_act) \
197 sysfs_rw_n(pwm, , offset, reg_min) \
198 sysfs_rw_n(fan, _status, offset, reg_status) \
199 sysfs_rw_n(fan, _div , offset, reg_ripple) \
200 sysfs_ro_n(fan, _input , offset, reg_act)
201
202 #define sysfs_temp(offset, reg_status, reg_act) \
203 sysfs_rw_n(temp, _status, offset, reg_status) \
204 sysfs_ro_n(temp, _input , offset, reg_act)
205
206 #define sysfs_in(offset, reg_act) \
207 sysfs_ro_n(in, _input, offset, reg_act)
208
209 #define sysfs_revision(reg_revision) \
210 sysfs_ro(revision, , reg_revision)
211
212 #define sysfs_alarms(reg_events) \
213 sysfs_ro(alarms, , reg_events)
214
215 #define sysfs_control(reg_control) \
216 sysfs_rw(control, , reg_control)
217
218 #define sysfs_watchdog(reg_control, reg_status, reg_preset) \
219 sysfs_rw(watchdog, _control, reg_control) \
220 sysfs_rw(watchdog, _status , reg_status) \
221 sysfs_rw(watchdog, _preset , reg_preset)
222
223 sysfs_fan(1, FSCHER_REG_FAN0_STATE, FSCHER_REG_FAN0_MIN,
224 FSCHER_REG_FAN0_RIPPLE, FSCHER_REG_FAN0_ACT)
225 sysfs_fan(2, FSCHER_REG_FAN1_STATE, FSCHER_REG_FAN1_MIN,
226 FSCHER_REG_FAN1_RIPPLE, FSCHER_REG_FAN1_ACT)
227 sysfs_fan(3, FSCHER_REG_FAN2_STATE, FSCHER_REG_FAN2_MIN,
228 FSCHER_REG_FAN2_RIPPLE, FSCHER_REG_FAN2_ACT)
229
230 sysfs_temp(1, FSCHER_REG_TEMP0_STATE, FSCHER_REG_TEMP0_ACT)
231 sysfs_temp(2, FSCHER_REG_TEMP1_STATE, FSCHER_REG_TEMP1_ACT)
232 sysfs_temp(3, FSCHER_REG_TEMP2_STATE, FSCHER_REG_TEMP2_ACT)
233
234 sysfs_in(0, FSCHER_REG_VOLT_12)
235 sysfs_in(1, FSCHER_REG_VOLT_5)
236 sysfs_in(2, FSCHER_REG_VOLT_BATT)
237
238 sysfs_revision(FSCHER_REG_REVISION)
239 sysfs_alarms(FSCHER_REG_EVENTS)
240 sysfs_control(FSCHER_REG_CONTROL)
241 sysfs_watchdog(FSCHER_REG_WDOG_CONTROL, FSCHER_REG_WDOG_STATE, FSCHER_REG_WDOG_PRESET)
242
243 #define device_create_file_fan(client, offset) \
244 do { \
245 device_create_file(&client->dev, &dev_attr_fan##offset##_status); \
246 device_create_file(&client->dev, &dev_attr_pwm##offset); \
247 device_create_file(&client->dev, &dev_attr_fan##offset##_div); \
248 device_create_file(&client->dev, &dev_attr_fan##offset##_input); \
249 } while (0)
250
251 #define device_create_file_temp(client, offset) \
252 do { \
253 device_create_file(&client->dev, &dev_attr_temp##offset##_status); \
254 device_create_file(&client->dev, &dev_attr_temp##offset##_input); \
255 } while (0)
256
257 #define device_create_file_in(client, offset) \
258 do { \
259 device_create_file(&client->dev, &dev_attr_in##offset##_input); \
260 } while (0)
261
262 #define device_create_file_revision(client) \
263 do { \
264 device_create_file(&client->dev, &dev_attr_revision); \
265 } while (0)
266
267 #define device_create_file_alarms(client) \
268 do { \
269 device_create_file(&client->dev, &dev_attr_alarms); \
270 } while (0)
271
272 #define device_create_file_control(client) \
273 do { \
274 device_create_file(&client->dev, &dev_attr_control); \
275 } while (0)
276
277 #define device_create_file_watchdog(client) \
278 do { \
279 device_create_file(&client->dev, &dev_attr_watchdog_status); \
280 device_create_file(&client->dev, &dev_attr_watchdog_control); \
281 device_create_file(&client->dev, &dev_attr_watchdog_preset); \
282 } while (0)
283
284 /*
285 * Real code
286 */
287
288 static int fscher_attach_adapter(struct i2c_adapter *adapter)
289 {
290 if (!(adapter->class & I2C_CLASS_HWMON))
291 return 0;
292 return i2c_probe(adapter, &addr_data, fscher_detect);
293 }
294
295 static int fscher_detect(struct i2c_adapter *adapter, int address, int kind)
296 {
297 struct i2c_client *new_client;
298 struct fscher_data *data;
299 int err = 0;
300
301 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
302 goto exit;
303
304 /* OK. For now, we presume we have a valid client. We now create the
305 * client structure, even though we cannot fill it completely yet.
306 * But it allows us to access i2c_smbus_read_byte_data. */
307 if (!(data = kzalloc(sizeof(struct fscher_data), GFP_KERNEL))) {
308 err = -ENOMEM;
309 goto exit;
310 }
311
312 /* The common I2C client data is placed right before the
313 * Hermes-specific data. */
314 new_client = &data->client;
315 i2c_set_clientdata(new_client, data);
316 new_client->addr = address;
317 new_client->adapter = adapter;
318 new_client->driver = &fscher_driver;
319 new_client->flags = 0;
320
321 /* Do the remaining detection unless force or force_fscher parameter */
322 if (kind < 0) {
323 if ((i2c_smbus_read_byte_data(new_client,
324 FSCHER_REG_IDENT_0) != 0x48) /* 'H' */
325 || (i2c_smbus_read_byte_data(new_client,
326 FSCHER_REG_IDENT_1) != 0x45) /* 'E' */
327 || (i2c_smbus_read_byte_data(new_client,
328 FSCHER_REG_IDENT_2) != 0x52)) /* 'R' */
329 goto exit_free;
330 }
331
332 /* Fill in the remaining client fields and put it into the
333 * global list */
334 strlcpy(new_client->name, "fscher", I2C_NAME_SIZE);
335 data->valid = 0;
336 mutex_init(&data->update_lock);
337
338 /* Tell the I2C layer a new client has arrived */
339 if ((err = i2c_attach_client(new_client)))
340 goto exit_free;
341
342 fscher_init_client(new_client);
343
344 /* Register sysfs hooks */
345 data->class_dev = hwmon_device_register(&new_client->dev);
346 if (IS_ERR(data->class_dev)) {
347 err = PTR_ERR(data->class_dev);
348 goto exit_detach;
349 }
350
351 device_create_file_revision(new_client);
352 device_create_file_alarms(new_client);
353 device_create_file_control(new_client);
354 device_create_file_watchdog(new_client);
355
356 device_create_file_in(new_client, 0);
357 device_create_file_in(new_client, 1);
358 device_create_file_in(new_client, 2);
359
360 device_create_file_fan(new_client, 1);
361 device_create_file_fan(new_client, 2);
362 device_create_file_fan(new_client, 3);
363
364 device_create_file_temp(new_client, 1);
365 device_create_file_temp(new_client, 2);
366 device_create_file_temp(new_client, 3);
367
368 return 0;
369
370 exit_detach:
371 i2c_detach_client(new_client);
372 exit_free:
373 kfree(data);
374 exit:
375 return err;
376 }
377
378 static int fscher_detach_client(struct i2c_client *client)
379 {
380 struct fscher_data *data = i2c_get_clientdata(client);
381 int err;
382
383 hwmon_device_unregister(data->class_dev);
384
385 if ((err = i2c_detach_client(client)))
386 return err;
387
388 kfree(data);
389 return 0;
390 }
391
392 static int fscher_read_value(struct i2c_client *client, u8 reg)
393 {
394 dev_dbg(&client->dev, "read reg 0x%02x\n", reg);
395
396 return i2c_smbus_read_byte_data(client, reg);
397 }
398
399 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value)
400 {
401 dev_dbg(&client->dev, "write reg 0x%02x, val 0x%02x\n",
402 reg, value);
403
404 return i2c_smbus_write_byte_data(client, reg, value);
405 }
406
407 /* Called when we have found a new FSC Hermes. */
408 static void fscher_init_client(struct i2c_client *client)
409 {
410 struct fscher_data *data = i2c_get_clientdata(client);
411
412 /* Read revision from chip */
413 data->revision = fscher_read_value(client, FSCHER_REG_REVISION);
414 }
415
416 static struct fscher_data *fscher_update_device(struct device *dev)
417 {
418 struct i2c_client *client = to_i2c_client(dev);
419 struct fscher_data *data = i2c_get_clientdata(client);
420
421 mutex_lock(&data->update_lock);
422
423 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
424
425 dev_dbg(&client->dev, "Starting fscher update\n");
426
427 data->temp_act[0] = fscher_read_value(client, FSCHER_REG_TEMP0_ACT);
428 data->temp_act[1] = fscher_read_value(client, FSCHER_REG_TEMP1_ACT);
429 data->temp_act[2] = fscher_read_value(client, FSCHER_REG_TEMP2_ACT);
430 data->temp_status[0] = fscher_read_value(client, FSCHER_REG_TEMP0_STATE);
431 data->temp_status[1] = fscher_read_value(client, FSCHER_REG_TEMP1_STATE);
432 data->temp_status[2] = fscher_read_value(client, FSCHER_REG_TEMP2_STATE);
433
434 data->volt[0] = fscher_read_value(client, FSCHER_REG_VOLT_12);
435 data->volt[1] = fscher_read_value(client, FSCHER_REG_VOLT_5);
436 data->volt[2] = fscher_read_value(client, FSCHER_REG_VOLT_BATT);
437
438 data->fan_act[0] = fscher_read_value(client, FSCHER_REG_FAN0_ACT);
439 data->fan_act[1] = fscher_read_value(client, FSCHER_REG_FAN1_ACT);
440 data->fan_act[2] = fscher_read_value(client, FSCHER_REG_FAN2_ACT);
441 data->fan_status[0] = fscher_read_value(client, FSCHER_REG_FAN0_STATE);
442 data->fan_status[1] = fscher_read_value(client, FSCHER_REG_FAN1_STATE);
443 data->fan_status[2] = fscher_read_value(client, FSCHER_REG_FAN2_STATE);
444 data->fan_min[0] = fscher_read_value(client, FSCHER_REG_FAN0_MIN);
445 data->fan_min[1] = fscher_read_value(client, FSCHER_REG_FAN1_MIN);
446 data->fan_min[2] = fscher_read_value(client, FSCHER_REG_FAN2_MIN);
447 data->fan_ripple[0] = fscher_read_value(client, FSCHER_REG_FAN0_RIPPLE);
448 data->fan_ripple[1] = fscher_read_value(client, FSCHER_REG_FAN1_RIPPLE);
449 data->fan_ripple[2] = fscher_read_value(client, FSCHER_REG_FAN2_RIPPLE);
450
451 data->watchdog[0] = fscher_read_value(client, FSCHER_REG_WDOG_PRESET);
452 data->watchdog[1] = fscher_read_value(client, FSCHER_REG_WDOG_STATE);
453 data->watchdog[2] = fscher_read_value(client, FSCHER_REG_WDOG_CONTROL);
454
455 data->global_event = fscher_read_value(client, FSCHER_REG_EVENT_STATE);
456
457 data->last_updated = jiffies;
458 data->valid = 1;
459 }
460
461 mutex_unlock(&data->update_lock);
462
463 return data;
464 }
465
466
467
468 #define FAN_INDEX_FROM_NUM(nr) ((nr) - 1)
469
470 static ssize_t set_fan_status(struct i2c_client *client, struct fscher_data *data,
471 const char *buf, size_t count, int nr, int reg)
472 {
473 /* bits 0..1, 3..7 reserved => mask with 0x04 */
474 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x04;
475
476 mutex_lock(&data->update_lock);
477 data->fan_status[FAN_INDEX_FROM_NUM(nr)] &= ~v;
478 fscher_write_value(client, reg, v);
479 mutex_unlock(&data->update_lock);
480 return count;
481 }
482
483 static ssize_t show_fan_status(struct fscher_data *data, char *buf, int nr)
484 {
485 /* bits 0..1, 3..7 reserved => mask with 0x04 */
486 return sprintf(buf, "%u\n", data->fan_status[FAN_INDEX_FROM_NUM(nr)] & 0x04);
487 }
488
489 static ssize_t set_pwm(struct i2c_client *client, struct fscher_data *data,
490 const char *buf, size_t count, int nr, int reg)
491 {
492 unsigned long v = simple_strtoul(buf, NULL, 10);
493
494 mutex_lock(&data->update_lock);
495 data->fan_min[FAN_INDEX_FROM_NUM(nr)] = v > 0xff ? 0xff : v;
496 fscher_write_value(client, reg, data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
497 mutex_unlock(&data->update_lock);
498 return count;
499 }
500
501 static ssize_t show_pwm(struct fscher_data *data, char *buf, int nr)
502 {
503 return sprintf(buf, "%u\n", data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
504 }
505
506 static ssize_t set_fan_div(struct i2c_client *client, struct fscher_data *data,
507 const char *buf, size_t count, int nr, int reg)
508 {
509 /* supported values: 2, 4, 8 */
510 unsigned long v = simple_strtoul(buf, NULL, 10);
511
512 switch (v) {
513 case 2: v = 1; break;
514 case 4: v = 2; break;
515 case 8: v = 3; break;
516 default:
517 dev_err(&client->dev, "fan_div value %ld not "
518 "supported. Choose one of 2, 4 or 8!\n", v);
519 return -EINVAL;
520 }
521
522 mutex_lock(&data->update_lock);
523
524 /* bits 2..7 reserved => mask with 0x03 */
525 data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] &= ~0x03;
526 data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] |= v;
527
528 fscher_write_value(client, reg, data->fan_ripple[FAN_INDEX_FROM_NUM(nr)]);
529 mutex_unlock(&data->update_lock);
530 return count;
531 }
532
533 static ssize_t show_fan_div(struct fscher_data *data, char *buf, int nr)
534 {
535 /* bits 2..7 reserved => mask with 0x03 */
536 return sprintf(buf, "%u\n", 1 << (data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] & 0x03));
537 }
538
539 #define RPM_FROM_REG(val) (val*60)
540
541 static ssize_t show_fan_input (struct fscher_data *data, char *buf, int nr)
542 {
543 return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[FAN_INDEX_FROM_NUM(nr)]));
544 }
545
546
547
548 #define TEMP_INDEX_FROM_NUM(nr) ((nr) - 1)
549
550 static ssize_t set_temp_status(struct i2c_client *client, struct fscher_data *data,
551 const char *buf, size_t count, int nr, int reg)
552 {
553 /* bits 2..7 reserved, 0 read only => mask with 0x02 */
554 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
555
556 mutex_lock(&data->update_lock);
557 data->temp_status[TEMP_INDEX_FROM_NUM(nr)] &= ~v;
558 fscher_write_value(client, reg, v);
559 mutex_unlock(&data->update_lock);
560 return count;
561 }
562
563 static ssize_t show_temp_status(struct fscher_data *data, char *buf, int nr)
564 {
565 /* bits 2..7 reserved => mask with 0x03 */
566 return sprintf(buf, "%u\n", data->temp_status[TEMP_INDEX_FROM_NUM(nr)] & 0x03);
567 }
568
569 #define TEMP_FROM_REG(val) (((val) - 128) * 1000)
570
571 static ssize_t show_temp_input(struct fscher_data *data, char *buf, int nr)
572 {
573 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[TEMP_INDEX_FROM_NUM(nr)]));
574 }
575
576 /*
577 * The final conversion is specified in sensors.conf, as it depends on
578 * mainboard specific values. We export the registers contents as
579 * pseudo-hundredths-of-Volts (range 0V - 2.55V). Not that it makes much
580 * sense per se, but it minimizes the conversions count and keeps the
581 * values within a usual range.
582 */
583 #define VOLT_FROM_REG(val) ((val) * 10)
584
585 static ssize_t show_in_input(struct fscher_data *data, char *buf, int nr)
586 {
587 return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[nr]));
588 }
589
590
591
592 static ssize_t show_revision(struct fscher_data *data, char *buf, int nr)
593 {
594 return sprintf(buf, "%u\n", data->revision);
595 }
596
597
598
599 static ssize_t show_alarms(struct fscher_data *data, char *buf, int nr)
600 {
601 /* bits 2, 5..6 reserved => mask with 0x9b */
602 return sprintf(buf, "%u\n", data->global_event & 0x9b);
603 }
604
605
606
607 static ssize_t set_control(struct i2c_client *client, struct fscher_data *data,
608 const char *buf, size_t count, int nr, int reg)
609 {
610 /* bits 1..7 reserved => mask with 0x01 */
611 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x01;
612
613 mutex_lock(&data->update_lock);
614 data->global_control &= ~v;
615 fscher_write_value(client, reg, v);
616 mutex_unlock(&data->update_lock);
617 return count;
618 }
619
620 static ssize_t show_control(struct fscher_data *data, char *buf, int nr)
621 {
622 /* bits 1..7 reserved => mask with 0x01 */
623 return sprintf(buf, "%u\n", data->global_control & 0x01);
624 }
625
626
627
628 static ssize_t set_watchdog_control(struct i2c_client *client, struct
629 fscher_data *data, const char *buf, size_t count,
630 int nr, int reg)
631 {
632 /* bits 0..3 reserved => mask with 0xf0 */
633 unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
634
635 mutex_lock(&data->update_lock);
636 data->watchdog[2] &= ~0xf0;
637 data->watchdog[2] |= v;
638 fscher_write_value(client, reg, data->watchdog[2]);
639 mutex_unlock(&data->update_lock);
640 return count;
641 }
642
643 static ssize_t show_watchdog_control(struct fscher_data *data, char *buf, int nr)
644 {
645 /* bits 0..3 reserved, bit 5 write only => mask with 0xd0 */
646 return sprintf(buf, "%u\n", data->watchdog[2] & 0xd0);
647 }
648
649 static ssize_t set_watchdog_status(struct i2c_client *client, struct fscher_data *data,
650 const char *buf, size_t count, int nr, int reg)
651 {
652 /* bits 0, 2..7 reserved => mask with 0x02 */
653 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
654
655 mutex_lock(&data->update_lock);
656 data->watchdog[1] &= ~v;
657 fscher_write_value(client, reg, v);
658 mutex_unlock(&data->update_lock);
659 return count;
660 }
661
662 static ssize_t show_watchdog_status(struct fscher_data *data, char *buf, int nr)
663 {
664 /* bits 0, 2..7 reserved => mask with 0x02 */
665 return sprintf(buf, "%u\n", data->watchdog[1] & 0x02);
666 }
667
668 static ssize_t set_watchdog_preset(struct i2c_client *client, struct fscher_data *data,
669 const char *buf, size_t count, int nr, int reg)
670 {
671 unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
672
673 mutex_lock(&data->update_lock);
674 data->watchdog[0] = v;
675 fscher_write_value(client, reg, data->watchdog[0]);
676 mutex_unlock(&data->update_lock);
677 return count;
678 }
679
680 static ssize_t show_watchdog_preset(struct fscher_data *data, char *buf, int nr)
681 {
682 return sprintf(buf, "%u\n", data->watchdog[0]);
683 }
684
685 static int __init sensors_fscher_init(void)
686 {
687 return i2c_add_driver(&fscher_driver);
688 }
689
690 static void __exit sensors_fscher_exit(void)
691 {
692 i2c_del_driver(&fscher_driver);
693 }
694
695 MODULE_AUTHOR("Reinhard Nissl <rnissl@gmx.de>");
696 MODULE_DESCRIPTION("FSC Hermes driver");
697 MODULE_LICENSE("GPL");
698
699 module_init(sensors_fscher_init);
700 module_exit(sensors_fscher_exit);
701
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