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1/*
2 * Support for the FTS Systemmonitoring Chip "Teutates"
3 *
4 * Copyright (C) 2016 Fujitsu Technology Solutions GmbH,
5 * Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 */
18#include <linux/err.h>
19#include <linux/fs.h>
20#include <linux/hwmon.h>
21#include <linux/hwmon-sysfs.h>
22#include <linux/i2c.h>
23#include <linux/init.h>
24#include <linux/jiffies.h>
25#include <linux/module.h>
26#include <linux/mutex.h>
27#include <linux/slab.h>
28#include <linux/sysfs.h>
29#include <linux/uaccess.h>
30#include <linux/watchdog.h>
31
32#define FTS_DEVICE_ID_REG 0x0000
33#define FTS_DEVICE_REVISION_REG 0x0001
34#define FTS_DEVICE_STATUS_REG 0x0004
35#define FTS_SATELLITE_STATUS_REG 0x0005
36#define FTS_EVENT_STATUS_REG 0x0006
37#define FTS_GLOBAL_CONTROL_REG 0x0007
38
39#define FTS_DEVICE_DETECT_REG_1 0x0C
40#define FTS_DEVICE_DETECT_REG_2 0x0D
41#define FTS_DEVICE_DETECT_REG_3 0x0E
42
43#define FTS_SENSOR_EVENT_REG 0x0010
44
45#define FTS_FAN_EVENT_REG 0x0014
46#define FTS_FAN_PRESENT_REG 0x0015
47
48#define FTS_POWER_ON_TIME_COUNTER_A 0x007A
49#define FTS_POWER_ON_TIME_COUNTER_B 0x007B
50#define FTS_POWER_ON_TIME_COUNTER_C 0x007C
51
52#define FTS_PAGE_SELECT_REG 0x007F
53
54#define FTS_WATCHDOG_TIME_PRESET 0x000B
55#define FTS_WATCHDOG_CONTROL 0x5081
56
57#define FTS_NO_FAN_SENSORS 0x08
58#define FTS_NO_TEMP_SENSORS 0x10
59#define FTS_NO_VOLT_SENSORS 0x04
60
61static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
62
63static struct i2c_device_id fts_id[] = {
64 { "ftsteutates", 0 },
65 { }
66};
67MODULE_DEVICE_TABLE(i2c, fts_id);
68
69enum WATCHDOG_RESOLUTION {
70 seconds = 1,
71 minutes = 60
72};
73
74struct fts_data {
75 struct i2c_client *client;
76 /* update sensor data lock */
77 struct mutex update_lock;
78 /* read/write register lock */
79 struct mutex access_lock;
80 unsigned long last_updated; /* in jiffies */
81 struct watchdog_device wdd;
82 enum WATCHDOG_RESOLUTION resolution;
83 bool valid; /* false until following fields are valid */
84
85 u8 volt[FTS_NO_VOLT_SENSORS];
86
87 u8 temp_input[FTS_NO_TEMP_SENSORS];
88 u8 temp_alarm;
89
90 u8 fan_present;
91 u8 fan_input[FTS_NO_FAN_SENSORS]; /* in rps */
92 u8 fan_source[FTS_NO_FAN_SENSORS];
93 u8 fan_alarm;
94};
95
96#define FTS_REG_FAN_INPUT(idx) ((idx) + 0x20)
97#define FTS_REG_FAN_SOURCE(idx) ((idx) + 0x30)
98#define FTS_REG_FAN_CONTROL(idx) (((idx) << 16) + 0x4881)
99
100#define FTS_REG_TEMP_INPUT(idx) ((idx) + 0x40)
101#define FTS_REG_TEMP_CONTROL(idx) (((idx) << 16) + 0x0681)
102
103#define FTS_REG_VOLT(idx) ((idx) + 0x18)
104
105/*****************************************************************************/
106/* I2C Helper functions */
107/*****************************************************************************/
108static int fts_read_byte(struct i2c_client *client, unsigned short reg)
109{
110 int ret;
111 unsigned char page = reg >> 8;
112 struct fts_data *data = dev_get_drvdata(&client->dev);
113
114 mutex_lock(&data->access_lock);
115
116 dev_dbg(&client->dev, "page select - page: 0x%.02x\n", page);
117 ret = i2c_smbus_write_byte_data(client, FTS_PAGE_SELECT_REG, page);
118 if (ret < 0)
119 goto error;
120
121 reg &= 0xFF;
122 ret = i2c_smbus_read_byte_data(client, reg);
123 dev_dbg(&client->dev, "read - reg: 0x%.02x: val: 0x%.02x\n", reg, ret);
124
125error:
126 mutex_unlock(&data->access_lock);
127 return ret;
128}
129
130static int fts_write_byte(struct i2c_client *client, unsigned short reg,
131 unsigned char value)
132{
133 int ret;
134 unsigned char page = reg >> 8;
135 struct fts_data *data = dev_get_drvdata(&client->dev);
136
137 mutex_lock(&data->access_lock);
138
139 dev_dbg(&client->dev, "page select - page: 0x%.02x\n", page);
140 ret = i2c_smbus_write_byte_data(client, FTS_PAGE_SELECT_REG, page);
141 if (ret < 0)
142 goto error;
143
144 reg &= 0xFF;
145 dev_dbg(&client->dev,
146 "write - reg: 0x%.02x: val: 0x%.02x\n", reg, value);
147 ret = i2c_smbus_write_byte_data(client, reg, value);
148
149error:
150 mutex_unlock(&data->access_lock);
151 return ret;
152}
153
154/*****************************************************************************/
155/* Data Updater Helper function */
156/*****************************************************************************/
157static int fts_update_device(struct fts_data *data)
158{
159 int i;
160 int err = 0;
161
162 mutex_lock(&data->update_lock);
163 if (!time_after(jiffies, data->last_updated + 2 * HZ) && data->valid)
164 goto exit;
165
166 err = fts_read_byte(data->client, FTS_DEVICE_STATUS_REG);
167 if (err < 0)
168 goto exit;
169
170 data->valid = !!(err & 0x02); /* Data not ready yet */
171 if (unlikely(!data->valid)) {
172 err = -EAGAIN;
173 goto exit;
174 }
175
176 err = fts_read_byte(data->client, FTS_FAN_PRESENT_REG);
177 if (err < 0)
178 goto exit;
179 data->fan_present = err;
180
181 err = fts_read_byte(data->client, FTS_FAN_EVENT_REG);
182 if (err < 0)
183 goto exit;
184 data->fan_alarm = err;
185
186 for (i = 0; i < FTS_NO_FAN_SENSORS; i++) {
187 if (data->fan_present & BIT(i)) {
188 err = fts_read_byte(data->client, FTS_REG_FAN_INPUT(i));
189 if (err < 0)
190 goto exit;
191 data->fan_input[i] = err;
192
193 err = fts_read_byte(data->client,
194 FTS_REG_FAN_SOURCE(i));
195 if (err < 0)
196 goto exit;
197 data->fan_source[i] = err;
198 } else {
199 data->fan_input[i] = 0;
200 data->fan_source[i] = 0;
201 }
202 }
203
204 err = fts_read_byte(data->client, FTS_SENSOR_EVENT_REG);
205 if (err < 0)
206 goto exit;
207 data->temp_alarm = err;
208
209 for (i = 0; i < FTS_NO_TEMP_SENSORS; i++) {
210 err = fts_read_byte(data->client, FTS_REG_TEMP_INPUT(i));
211 if (err < 0)
212 goto exit;
213 data->temp_input[i] = err;
214 }
215
216 for (i = 0; i < FTS_NO_VOLT_SENSORS; i++) {
217 err = fts_read_byte(data->client, FTS_REG_VOLT(i));
218 if (err < 0)
219 goto exit;
220 data->volt[i] = err;
221 }
222 data->last_updated = jiffies;
223 err = 0;
224exit:
225 mutex_unlock(&data->update_lock);
226 return err;
227}
228
229/*****************************************************************************/
230/* Watchdog functions */
231/*****************************************************************************/
232static int fts_wd_set_resolution(struct fts_data *data,
233 enum WATCHDOG_RESOLUTION resolution)
234{
235 int ret;
236
237 if (data->resolution == resolution)
238 return 0;
239
240 ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL);
241 if (ret < 0)
242 return ret;
243
244 if ((resolution == seconds && ret & BIT(1)) ||
245 (resolution == minutes && (ret & BIT(1)) == 0)) {
246 data->resolution = resolution;
247 return 0;
248 }
249
250 if (resolution == seconds)
251 ret |= BIT(1);
252 else
253 ret &= ~BIT(1);
254
255 ret = fts_write_byte(data->client, FTS_WATCHDOG_CONTROL, ret);
256 if (ret < 0)
257 return ret;
258
259 data->resolution = resolution;
260 return ret;
261}
262
263static int fts_wd_set_timeout(struct watchdog_device *wdd, unsigned int timeout)
264{
265 struct fts_data *data;
266 enum WATCHDOG_RESOLUTION resolution = seconds;
267 int ret;
268
269 data = watchdog_get_drvdata(wdd);
270 /* switch watchdog resolution to minutes if timeout does not fit
271 * into a byte
272 */
273 if (timeout > 0xFF) {
274 timeout = DIV_ROUND_UP(timeout, 60) * 60;
275 resolution = minutes;
276 }
277
278 ret = fts_wd_set_resolution(data, resolution);
279 if (ret < 0)
280 return ret;
281
282 wdd->timeout = timeout;
283 return 0;
284}
285
286static int fts_wd_start(struct watchdog_device *wdd)
287{
288 struct fts_data *data = watchdog_get_drvdata(wdd);
289
290 return fts_write_byte(data->client, FTS_WATCHDOG_TIME_PRESET,
291 wdd->timeout / (u8)data->resolution);
292}
293
294static int fts_wd_stop(struct watchdog_device *wdd)
295{
296 struct fts_data *data;
297
298 data = watchdog_get_drvdata(wdd);
299 return fts_write_byte(data->client, FTS_WATCHDOG_TIME_PRESET, 0);
300}
301
302static const struct watchdog_info fts_wd_info = {
303 .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
304 .identity = "FTS Teutates Hardware Watchdog",
305};
306
307static const struct watchdog_ops fts_wd_ops = {
308 .owner = THIS_MODULE,
309 .start = fts_wd_start,
310 .stop = fts_wd_stop,
311 .set_timeout = fts_wd_set_timeout,
312};
313
314static int fts_watchdog_init(struct fts_data *data)
315{
316 int timeout, ret;
317
318 watchdog_set_drvdata(&data->wdd, data);
319
320 timeout = fts_read_byte(data->client, FTS_WATCHDOG_TIME_PRESET);
321 if (timeout < 0)
322 return timeout;
323
324 /* watchdog not running, set timeout to a default of 60 sec. */
325 if (timeout == 0) {
326 ret = fts_wd_set_resolution(data, seconds);
327 if (ret < 0)
328 return ret;
329 data->wdd.timeout = 60;
330 } else {
331 ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL);
332 if (ret < 0)
333 return ret;
334
335 data->resolution = ret & BIT(1) ? seconds : minutes;
336 data->wdd.timeout = timeout * (u8)data->resolution;
337 set_bit(WDOG_HW_RUNNING, &data->wdd.status);
338 }
339
340 /* Register our watchdog part */
341 data->wdd.info = &fts_wd_info;
342 data->wdd.ops = &fts_wd_ops;
343 data->wdd.parent = &data->client->dev;
344 data->wdd.min_timeout = 1;
345
346 /* max timeout 255 minutes. */
347 data->wdd.max_hw_heartbeat_ms = 0xFF * 60 * MSEC_PER_SEC;
348
349 return watchdog_register_device(&data->wdd);
350}
351
352/*****************************************************************************/
353/* SysFS handler functions */
354/*****************************************************************************/
355static ssize_t show_in_value(struct device *dev,
356 struct device_attribute *devattr, char *buf)
357{
358 struct fts_data *data = dev_get_drvdata(dev);
359 int index = to_sensor_dev_attr(devattr)->index;
360 int err;
361
362 err = fts_update_device(data);
363 if (err < 0)
364 return err;
365
366 return sprintf(buf, "%u\n", data->volt[index]);
367}
368
369static ssize_t show_temp_value(struct device *dev,
370 struct device_attribute *devattr, char *buf)
371{
372 struct fts_data *data = dev_get_drvdata(dev);
373 int index = to_sensor_dev_attr(devattr)->index;
374 int err;
375
376 err = fts_update_device(data);
377 if (err < 0)
378 return err;
379
380 return sprintf(buf, "%u\n", data->temp_input[index]);
381}
382
383static ssize_t show_temp_fault(struct device *dev,
384 struct device_attribute *devattr, char *buf)
385{
386 struct fts_data *data = dev_get_drvdata(dev);
387 int index = to_sensor_dev_attr(devattr)->index;
388 int err;
389
390 err = fts_update_device(data);
391 if (err < 0)
392 return err;
393
394 /* 00h Temperature = Sensor Error */
395 return sprintf(buf, "%d\n", data->temp_input[index] == 0);
396}
397
398static ssize_t show_temp_alarm(struct device *dev,
399 struct device_attribute *devattr, char *buf)
400{
401 struct fts_data *data = dev_get_drvdata(dev);
402 int index = to_sensor_dev_attr(devattr)->index;
403 int err;
404
405 err = fts_update_device(data);
406 if (err < 0)
407 return err;
408
409 return sprintf(buf, "%u\n", !!(data->temp_alarm & BIT(index)));
410}
411
412static ssize_t
413clear_temp_alarm(struct device *dev, struct device_attribute *devattr,
414 const char *buf, size_t count)
415{
416 struct fts_data *data = dev_get_drvdata(dev);
417 int index = to_sensor_dev_attr(devattr)->index;
418 long ret;
419
420 ret = fts_update_device(data);
421 if (ret < 0)
422 return ret;
423
424 if (kstrtoul(buf, 10, &ret) || ret != 0)
425 return -EINVAL;
426
427 mutex_lock(&data->update_lock);
428 ret = fts_read_byte(data->client, FTS_REG_TEMP_CONTROL(index));
429 if (ret < 0)
430 goto error;
431
432 ret = fts_write_byte(data->client, FTS_REG_TEMP_CONTROL(index),
433 ret | 0x1);
434 if (ret < 0)
435 goto error;
436
437 data->valid = false;
438error:
439 mutex_unlock(&data->update_lock);
440 return ret;
441}
442
443static ssize_t show_fan_value(struct device *dev,
444 struct device_attribute *devattr, char *buf)
445{
446 struct fts_data *data = dev_get_drvdata(dev);
447 int index = to_sensor_dev_attr(devattr)->index;
448 int err;
449
450 err = fts_update_device(data);
451 if (err < 0)
452 return err;
453
454 return sprintf(buf, "%u\n", data->fan_input[index]);
455}
456
457static ssize_t show_fan_source(struct device *dev,
458 struct device_attribute *devattr, char *buf)
459{
460 struct fts_data *data = dev_get_drvdata(dev);
461 int index = to_sensor_dev_attr(devattr)->index;
462 int err;
463
464 err = fts_update_device(data);
465 if (err < 0)
466 return err;
467
468 return sprintf(buf, "%u\n", data->fan_source[index]);
469}
470
471static ssize_t show_fan_alarm(struct device *dev,
472 struct device_attribute *devattr, char *buf)
473{
474 struct fts_data *data = dev_get_drvdata(dev);
475 int index = to_sensor_dev_attr(devattr)->index;
476 int err;
477
478 err = fts_update_device(data);
479 if (err < 0)
480 return err;
481
482 return sprintf(buf, "%d\n", !!(data->fan_alarm & BIT(index)));
483}
484
485static ssize_t
486clear_fan_alarm(struct device *dev, struct device_attribute *devattr,
487 const char *buf, size_t count)
488{
489 struct fts_data *data = dev_get_drvdata(dev);
490 int index = to_sensor_dev_attr(devattr)->index;
491 long ret;
492
493 ret = fts_update_device(data);
494 if (ret < 0)
495 return ret;
496
497 if (kstrtoul(buf, 10, &ret) || ret != 0)
498 return -EINVAL;
499
500 mutex_lock(&data->update_lock);
501 ret = fts_read_byte(data->client, FTS_REG_FAN_CONTROL(index));
502 if (ret < 0)
503 goto error;
504
505 ret = fts_write_byte(data->client, FTS_REG_FAN_CONTROL(index),
506 ret | 0x1);
507 if (ret < 0)
508 goto error;
509
510 data->valid = false;
511error:
512 mutex_unlock(&data->update_lock);
513 return ret;
514}
515
516/*****************************************************************************/
517/* SysFS structs */
518/*****************************************************************************/
519
520/* Temprature sensors */
521static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_value, NULL, 0);
522static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_value, NULL, 1);
523static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp_value, NULL, 2);
524static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp_value, NULL, 3);
525static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp_value, NULL, 4);
526static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp_value, NULL, 5);
527static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp_value, NULL, 6);
528static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp_value, NULL, 7);
529static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, show_temp_value, NULL, 8);
530static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, show_temp_value, NULL, 9);
531static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO, show_temp_value, NULL, 10);
532static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO, show_temp_value, NULL, 11);
533static SENSOR_DEVICE_ATTR(temp13_input, S_IRUGO, show_temp_value, NULL, 12);
534static SENSOR_DEVICE_ATTR(temp14_input, S_IRUGO, show_temp_value, NULL, 13);
535static SENSOR_DEVICE_ATTR(temp15_input, S_IRUGO, show_temp_value, NULL, 14);
536static SENSOR_DEVICE_ATTR(temp16_input, S_IRUGO, show_temp_value, NULL, 15);
537
538static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0);
539static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1);
540static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2);
541static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3);
542static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4);
543static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5);
544static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_temp_fault, NULL, 6);
545static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_temp_fault, NULL, 7);
546static SENSOR_DEVICE_ATTR(temp9_fault, S_IRUGO, show_temp_fault, NULL, 8);
547static SENSOR_DEVICE_ATTR(temp10_fault, S_IRUGO, show_temp_fault, NULL, 9);
548static SENSOR_DEVICE_ATTR(temp11_fault, S_IRUGO, show_temp_fault, NULL, 10);
549static SENSOR_DEVICE_ATTR(temp12_fault, S_IRUGO, show_temp_fault, NULL, 11);
550static SENSOR_DEVICE_ATTR(temp13_fault, S_IRUGO, show_temp_fault, NULL, 12);
551static SENSOR_DEVICE_ATTR(temp14_fault, S_IRUGO, show_temp_fault, NULL, 13);
552static SENSOR_DEVICE_ATTR(temp15_fault, S_IRUGO, show_temp_fault, NULL, 14);
553static SENSOR_DEVICE_ATTR(temp16_fault, S_IRUGO, show_temp_fault, NULL, 15);
554
555static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
556 clear_temp_alarm, 0);
557static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
558 clear_temp_alarm, 1);
559static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
560 clear_temp_alarm, 2);
561static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
562 clear_temp_alarm, 3);
563static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
564 clear_temp_alarm, 4);
565static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
566 clear_temp_alarm, 5);
567static SENSOR_DEVICE_ATTR(temp7_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
568 clear_temp_alarm, 6);
569static SENSOR_DEVICE_ATTR(temp8_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
570 clear_temp_alarm, 7);
571static SENSOR_DEVICE_ATTR(temp9_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
572 clear_temp_alarm, 8);
573static SENSOR_DEVICE_ATTR(temp10_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
574 clear_temp_alarm, 9);
575static SENSOR_DEVICE_ATTR(temp11_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
576 clear_temp_alarm, 10);
577static SENSOR_DEVICE_ATTR(temp12_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
578 clear_temp_alarm, 11);
579static SENSOR_DEVICE_ATTR(temp13_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
580 clear_temp_alarm, 12);
581static SENSOR_DEVICE_ATTR(temp14_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
582 clear_temp_alarm, 13);
583static SENSOR_DEVICE_ATTR(temp15_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
584 clear_temp_alarm, 14);
585static SENSOR_DEVICE_ATTR(temp16_alarm, S_IRUGO | S_IWUSR, show_temp_alarm,
586 clear_temp_alarm, 15);
587
588static struct attribute *fts_temp_attrs[] = {
589 &sensor_dev_attr_temp1_input.dev_attr.attr,
590 &sensor_dev_attr_temp2_input.dev_attr.attr,
591 &sensor_dev_attr_temp3_input.dev_attr.attr,
592 &sensor_dev_attr_temp4_input.dev_attr.attr,
593 &sensor_dev_attr_temp5_input.dev_attr.attr,
594 &sensor_dev_attr_temp6_input.dev_attr.attr,
595 &sensor_dev_attr_temp7_input.dev_attr.attr,
596 &sensor_dev_attr_temp8_input.dev_attr.attr,
597 &sensor_dev_attr_temp9_input.dev_attr.attr,
598 &sensor_dev_attr_temp10_input.dev_attr.attr,
599 &sensor_dev_attr_temp11_input.dev_attr.attr,
600 &sensor_dev_attr_temp12_input.dev_attr.attr,
601 &sensor_dev_attr_temp13_input.dev_attr.attr,
602 &sensor_dev_attr_temp14_input.dev_attr.attr,
603 &sensor_dev_attr_temp15_input.dev_attr.attr,
604 &sensor_dev_attr_temp16_input.dev_attr.attr,
605
606 &sensor_dev_attr_temp1_fault.dev_attr.attr,
607 &sensor_dev_attr_temp2_fault.dev_attr.attr,
608 &sensor_dev_attr_temp3_fault.dev_attr.attr,
609 &sensor_dev_attr_temp4_fault.dev_attr.attr,
610 &sensor_dev_attr_temp5_fault.dev_attr.attr,
611 &sensor_dev_attr_temp6_fault.dev_attr.attr,
612 &sensor_dev_attr_temp7_fault.dev_attr.attr,
613 &sensor_dev_attr_temp8_fault.dev_attr.attr,
614 &sensor_dev_attr_temp9_fault.dev_attr.attr,
615 &sensor_dev_attr_temp10_fault.dev_attr.attr,
616 &sensor_dev_attr_temp11_fault.dev_attr.attr,
617 &sensor_dev_attr_temp12_fault.dev_attr.attr,
618 &sensor_dev_attr_temp13_fault.dev_attr.attr,
619 &sensor_dev_attr_temp14_fault.dev_attr.attr,
620 &sensor_dev_attr_temp15_fault.dev_attr.attr,
621 &sensor_dev_attr_temp16_fault.dev_attr.attr,
622
623 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
624 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
625 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
626 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
627 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
628 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
629 &sensor_dev_attr_temp7_alarm.dev_attr.attr,
630 &sensor_dev_attr_temp8_alarm.dev_attr.attr,
631 &sensor_dev_attr_temp9_alarm.dev_attr.attr,
632 &sensor_dev_attr_temp10_alarm.dev_attr.attr,
633 &sensor_dev_attr_temp11_alarm.dev_attr.attr,
634 &sensor_dev_attr_temp12_alarm.dev_attr.attr,
635 &sensor_dev_attr_temp13_alarm.dev_attr.attr,
636 &sensor_dev_attr_temp14_alarm.dev_attr.attr,
637 &sensor_dev_attr_temp15_alarm.dev_attr.attr,
638 &sensor_dev_attr_temp16_alarm.dev_attr.attr,
639 NULL
640};
641
642/* Fans */
643static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_value, NULL, 0);
644static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_value, NULL, 1);
645static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan_value, NULL, 2);
646static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan_value, NULL, 3);
647static SENSOR_DEVICE_ATTR(fan5_input, S_IRUGO, show_fan_value, NULL, 4);
648static SENSOR_DEVICE_ATTR(fan6_input, S_IRUGO, show_fan_value, NULL, 5);
649static SENSOR_DEVICE_ATTR(fan7_input, S_IRUGO, show_fan_value, NULL, 6);
650static SENSOR_DEVICE_ATTR(fan8_input, S_IRUGO, show_fan_value, NULL, 7);
651
652static SENSOR_DEVICE_ATTR(fan1_source, S_IRUGO, show_fan_source, NULL, 0);
653static SENSOR_DEVICE_ATTR(fan2_source, S_IRUGO, show_fan_source, NULL, 1);
654static SENSOR_DEVICE_ATTR(fan3_source, S_IRUGO, show_fan_source, NULL, 2);
655static SENSOR_DEVICE_ATTR(fan4_source, S_IRUGO, show_fan_source, NULL, 3);
656static SENSOR_DEVICE_ATTR(fan5_source, S_IRUGO, show_fan_source, NULL, 4);
657static SENSOR_DEVICE_ATTR(fan6_source, S_IRUGO, show_fan_source, NULL, 5);
658static SENSOR_DEVICE_ATTR(fan7_source, S_IRUGO, show_fan_source, NULL, 6);
659static SENSOR_DEVICE_ATTR(fan8_source, S_IRUGO, show_fan_source, NULL, 7);
660
661static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO | S_IWUSR,
662 show_fan_alarm, clear_fan_alarm, 0);
663static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO | S_IWUSR,
664 show_fan_alarm, clear_fan_alarm, 1);
665static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO | S_IWUSR,
666 show_fan_alarm, clear_fan_alarm, 2);
667static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO | S_IWUSR,
668 show_fan_alarm, clear_fan_alarm, 3);
669static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO | S_IWUSR,
670 show_fan_alarm, clear_fan_alarm, 4);
671static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO | S_IWUSR,
672 show_fan_alarm, clear_fan_alarm, 5);
673static SENSOR_DEVICE_ATTR(fan7_alarm, S_IRUGO | S_IWUSR,
674 show_fan_alarm, clear_fan_alarm, 6);
675static SENSOR_DEVICE_ATTR(fan8_alarm, S_IRUGO | S_IWUSR,
676 show_fan_alarm, clear_fan_alarm, 7);
677
678static struct attribute *fts_fan_attrs[] = {
679 &sensor_dev_attr_fan1_input.dev_attr.attr,
680 &sensor_dev_attr_fan2_input.dev_attr.attr,
681 &sensor_dev_attr_fan3_input.dev_attr.attr,
682 &sensor_dev_attr_fan4_input.dev_attr.attr,
683 &sensor_dev_attr_fan5_input.dev_attr.attr,
684 &sensor_dev_attr_fan6_input.dev_attr.attr,
685 &sensor_dev_attr_fan7_input.dev_attr.attr,
686 &sensor_dev_attr_fan8_input.dev_attr.attr,
687
688 &sensor_dev_attr_fan1_source.dev_attr.attr,
689 &sensor_dev_attr_fan2_source.dev_attr.attr,
690 &sensor_dev_attr_fan3_source.dev_attr.attr,
691 &sensor_dev_attr_fan4_source.dev_attr.attr,
692 &sensor_dev_attr_fan5_source.dev_attr.attr,
693 &sensor_dev_attr_fan6_source.dev_attr.attr,
694 &sensor_dev_attr_fan7_source.dev_attr.attr,
695 &sensor_dev_attr_fan8_source.dev_attr.attr,
696
697 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
698 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
699 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
700 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
701 &sensor_dev_attr_fan5_alarm.dev_attr.attr,
702 &sensor_dev_attr_fan6_alarm.dev_attr.attr,
703 &sensor_dev_attr_fan7_alarm.dev_attr.attr,
704 &sensor_dev_attr_fan8_alarm.dev_attr.attr,
705 NULL
706};
707
708/* Voltages */
709static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in_value, NULL, 0);
710static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in_value, NULL, 1);
711static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in_value, NULL, 2);
712static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in_value, NULL, 3);
713static struct attribute *fts_voltage_attrs[] = {
714 &sensor_dev_attr_in1_input.dev_attr.attr,
715 &sensor_dev_attr_in2_input.dev_attr.attr,
716 &sensor_dev_attr_in3_input.dev_attr.attr,
717 &sensor_dev_attr_in4_input.dev_attr.attr,
718 NULL
719};
720
721static const struct attribute_group fts_voltage_attr_group = {
722 .attrs = fts_voltage_attrs
723};
724
725static const struct attribute_group fts_temp_attr_group = {
726 .attrs = fts_temp_attrs
727};
728
729static const struct attribute_group fts_fan_attr_group = {
730 .attrs = fts_fan_attrs
731};
732
733static const struct attribute_group *fts_attr_groups[] = {
734 &fts_voltage_attr_group,
735 &fts_temp_attr_group,
736 &fts_fan_attr_group,
737 NULL
738};
739
740/*****************************************************************************/
741/* Module initialization / remove functions */
742/*****************************************************************************/
743static int fts_detect(struct i2c_client *client,
744 struct i2c_board_info *info)
745{
746 int val;
747
748 /* detection works with revsion greater or equal to 0x2b */
749 val = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG);
750 if (val < 0x2b)
751 return -ENODEV;
752
753 /* Device Detect Regs must have 0x17 0x34 and 0x54 */
754 val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_1);
755 if (val != 0x17)
756 return -ENODEV;
757
758 val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_2);
759 if (val != 0x34)
760 return -ENODEV;
761
762 val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_3);
763 if (val != 0x54)
764 return -ENODEV;
765
766 /*
767 * 0x10 == Baseboard Management Controller, 0x01 == Teutates
768 * Device ID Reg needs to be 0x11
769 */
770 val = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG);
771 if (val != 0x11)
772 return -ENODEV;
773
774 strlcpy(info->type, fts_id[0].name, I2C_NAME_SIZE);
775 info->flags = 0;
776 return 0;
777}
778
779static int fts_remove(struct i2c_client *client)
780{
781 struct fts_data *data = dev_get_drvdata(&client->dev);
782
783 watchdog_unregister_device(&data->wdd);
784 return 0;
785}
786
787static int fts_probe(struct i2c_client *client, const struct i2c_device_id *id)
788{
789 u8 revision;
790 struct fts_data *data;
791 int err;
792 s8 deviceid;
793 struct device *hwmon_dev;
794
795 if (client->addr != 0x73)
796 return -ENODEV;
797
798 /* Baseboard Management Controller check */
799 deviceid = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG);
800 if (deviceid > 0 && (deviceid & 0xF0) == 0x10) {
801 switch (deviceid & 0x0F) {
802 case 0x01:
803 break;
804 default:
805 dev_dbg(&client->dev,
806 "No Baseboard Management Controller\n");
807 return -ENODEV;
808 }
809 } else {
810 dev_dbg(&client->dev, "No fujitsu board\n");
811 return -ENODEV;
812 }
813
814 data = devm_kzalloc(&client->dev, sizeof(struct fts_data),
815 GFP_KERNEL);
816 if (!data)
817 return -ENOMEM;
818
819 mutex_init(&data->update_lock);
820 mutex_init(&data->access_lock);
821 data->client = client;
822 dev_set_drvdata(&client->dev, data);
823
824 err = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG);
825 if (err < 0)
826 return err;
827 revision = err;
828
829 hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
830 "ftsteutates",
831 data,
832 fts_attr_groups);
833 if (IS_ERR(hwmon_dev))
834 return PTR_ERR(hwmon_dev);
835
836 err = fts_watchdog_init(data);
837 if (err)
838 return err;
839
840 dev_info(&client->dev, "Detected FTS Teutates chip, revision: %d.%d\n",
841 (revision & 0xF0) >> 4, revision & 0x0F);
842 return 0;
843}
844
845/*****************************************************************************/
846/* Module Details */
847/*****************************************************************************/
848static struct i2c_driver fts_driver = {
849 .class = I2C_CLASS_HWMON,
850 .driver = {
851 .name = "ftsteutates",
852 },
853 .id_table = fts_id,
854 .probe = fts_probe,
855 .remove = fts_remove,
856 .detect = fts_detect,
857 .address_list = normal_i2c,
858};
859
860module_i2c_driver(fts_driver);
861
862MODULE_AUTHOR("Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>");
863MODULE_DESCRIPTION("FTS Teutates driver");
864MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Support for the FTS Systemmonitoring Chip "Teutates"
4 *
5 * Copyright (C) 2016 Fujitsu Technology Solutions GmbH,
6 * Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>
7 */
8#include <linux/err.h>
9#include <linux/fs.h>
10#include <linux/hwmon.h>
11#include <linux/hwmon-sysfs.h>
12#include <linux/i2c.h>
13#include <linux/init.h>
14#include <linux/jiffies.h>
15#include <linux/module.h>
16#include <linux/mutex.h>
17#include <linux/slab.h>
18#include <linux/sysfs.h>
19#include <linux/uaccess.h>
20#include <linux/watchdog.h>
21
22#define FTS_DEVICE_ID_REG 0x0000
23#define FTS_DEVICE_REVISION_REG 0x0001
24#define FTS_DEVICE_STATUS_REG 0x0004
25#define FTS_SATELLITE_STATUS_REG 0x0005
26#define FTS_EVENT_STATUS_REG 0x0006
27#define FTS_GLOBAL_CONTROL_REG 0x0007
28
29#define FTS_DEVICE_DETECT_REG_1 0x0C
30#define FTS_DEVICE_DETECT_REG_2 0x0D
31#define FTS_DEVICE_DETECT_REG_3 0x0E
32
33#define FTS_SENSOR_EVENT_REG 0x0010
34
35#define FTS_FAN_EVENT_REG 0x0014
36#define FTS_FAN_PRESENT_REG 0x0015
37
38#define FTS_POWER_ON_TIME_COUNTER_A 0x007A
39#define FTS_POWER_ON_TIME_COUNTER_B 0x007B
40#define FTS_POWER_ON_TIME_COUNTER_C 0x007C
41
42#define FTS_PAGE_SELECT_REG 0x007F
43
44#define FTS_WATCHDOG_TIME_PRESET 0x000B
45#define FTS_WATCHDOG_CONTROL 0x5081
46
47#define FTS_NO_FAN_SENSORS 0x08
48#define FTS_NO_TEMP_SENSORS 0x10
49#define FTS_NO_VOLT_SENSORS 0x04
50
51static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
52
53static const struct i2c_device_id fts_id[] = {
54 { "ftsteutates", 0 },
55 { }
56};
57MODULE_DEVICE_TABLE(i2c, fts_id);
58
59enum WATCHDOG_RESOLUTION {
60 seconds = 1,
61 minutes = 60
62};
63
64struct fts_data {
65 struct i2c_client *client;
66 /* update sensor data lock */
67 struct mutex update_lock;
68 /* read/write register lock */
69 struct mutex access_lock;
70 unsigned long last_updated; /* in jiffies */
71 struct watchdog_device wdd;
72 enum WATCHDOG_RESOLUTION resolution;
73 bool valid; /* false until following fields are valid */
74
75 u8 volt[FTS_NO_VOLT_SENSORS];
76
77 u8 temp_input[FTS_NO_TEMP_SENSORS];
78 u8 temp_alarm;
79
80 u8 fan_present;
81 u8 fan_input[FTS_NO_FAN_SENSORS]; /* in rps */
82 u8 fan_source[FTS_NO_FAN_SENSORS];
83 u8 fan_alarm;
84};
85
86#define FTS_REG_FAN_INPUT(idx) ((idx) + 0x20)
87#define FTS_REG_FAN_SOURCE(idx) ((idx) + 0x30)
88#define FTS_REG_FAN_CONTROL(idx) (((idx) << 16) + 0x4881)
89
90#define FTS_REG_TEMP_INPUT(idx) ((idx) + 0x40)
91#define FTS_REG_TEMP_CONTROL(idx) (((idx) << 16) + 0x0681)
92
93#define FTS_REG_VOLT(idx) ((idx) + 0x18)
94
95/*****************************************************************************/
96/* I2C Helper functions */
97/*****************************************************************************/
98static int fts_read_byte(struct i2c_client *client, unsigned short reg)
99{
100 int ret;
101 unsigned char page = reg >> 8;
102 struct fts_data *data = dev_get_drvdata(&client->dev);
103
104 mutex_lock(&data->access_lock);
105
106 dev_dbg(&client->dev, "page select - page: 0x%.02x\n", page);
107 ret = i2c_smbus_write_byte_data(client, FTS_PAGE_SELECT_REG, page);
108 if (ret < 0)
109 goto error;
110
111 reg &= 0xFF;
112 ret = i2c_smbus_read_byte_data(client, reg);
113 dev_dbg(&client->dev, "read - reg: 0x%.02x: val: 0x%.02x\n", reg, ret);
114
115error:
116 mutex_unlock(&data->access_lock);
117 return ret;
118}
119
120static int fts_write_byte(struct i2c_client *client, unsigned short reg,
121 unsigned char value)
122{
123 int ret;
124 unsigned char page = reg >> 8;
125 struct fts_data *data = dev_get_drvdata(&client->dev);
126
127 mutex_lock(&data->access_lock);
128
129 dev_dbg(&client->dev, "page select - page: 0x%.02x\n", page);
130 ret = i2c_smbus_write_byte_data(client, FTS_PAGE_SELECT_REG, page);
131 if (ret < 0)
132 goto error;
133
134 reg &= 0xFF;
135 dev_dbg(&client->dev,
136 "write - reg: 0x%.02x: val: 0x%.02x\n", reg, value);
137 ret = i2c_smbus_write_byte_data(client, reg, value);
138
139error:
140 mutex_unlock(&data->access_lock);
141 return ret;
142}
143
144/*****************************************************************************/
145/* Data Updater Helper function */
146/*****************************************************************************/
147static int fts_update_device(struct fts_data *data)
148{
149 int i;
150 int err = 0;
151
152 mutex_lock(&data->update_lock);
153 if (!time_after(jiffies, data->last_updated + 2 * HZ) && data->valid)
154 goto exit;
155
156 err = fts_read_byte(data->client, FTS_DEVICE_STATUS_REG);
157 if (err < 0)
158 goto exit;
159
160 data->valid = !!(err & 0x02); /* Data not ready yet */
161 if (unlikely(!data->valid)) {
162 err = -EAGAIN;
163 goto exit;
164 }
165
166 err = fts_read_byte(data->client, FTS_FAN_PRESENT_REG);
167 if (err < 0)
168 goto exit;
169 data->fan_present = err;
170
171 err = fts_read_byte(data->client, FTS_FAN_EVENT_REG);
172 if (err < 0)
173 goto exit;
174 data->fan_alarm = err;
175
176 for (i = 0; i < FTS_NO_FAN_SENSORS; i++) {
177 if (data->fan_present & BIT(i)) {
178 err = fts_read_byte(data->client, FTS_REG_FAN_INPUT(i));
179 if (err < 0)
180 goto exit;
181 data->fan_input[i] = err;
182
183 err = fts_read_byte(data->client,
184 FTS_REG_FAN_SOURCE(i));
185 if (err < 0)
186 goto exit;
187 data->fan_source[i] = err;
188 } else {
189 data->fan_input[i] = 0;
190 data->fan_source[i] = 0;
191 }
192 }
193
194 err = fts_read_byte(data->client, FTS_SENSOR_EVENT_REG);
195 if (err < 0)
196 goto exit;
197 data->temp_alarm = err;
198
199 for (i = 0; i < FTS_NO_TEMP_SENSORS; i++) {
200 err = fts_read_byte(data->client, FTS_REG_TEMP_INPUT(i));
201 if (err < 0)
202 goto exit;
203 data->temp_input[i] = err;
204 }
205
206 for (i = 0; i < FTS_NO_VOLT_SENSORS; i++) {
207 err = fts_read_byte(data->client, FTS_REG_VOLT(i));
208 if (err < 0)
209 goto exit;
210 data->volt[i] = err;
211 }
212 data->last_updated = jiffies;
213 err = 0;
214exit:
215 mutex_unlock(&data->update_lock);
216 return err;
217}
218
219/*****************************************************************************/
220/* Watchdog functions */
221/*****************************************************************************/
222static int fts_wd_set_resolution(struct fts_data *data,
223 enum WATCHDOG_RESOLUTION resolution)
224{
225 int ret;
226
227 if (data->resolution == resolution)
228 return 0;
229
230 ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL);
231 if (ret < 0)
232 return ret;
233
234 if ((resolution == seconds && ret & BIT(1)) ||
235 (resolution == minutes && (ret & BIT(1)) == 0)) {
236 data->resolution = resolution;
237 return 0;
238 }
239
240 if (resolution == seconds)
241 ret |= BIT(1);
242 else
243 ret &= ~BIT(1);
244
245 ret = fts_write_byte(data->client, FTS_WATCHDOG_CONTROL, ret);
246 if (ret < 0)
247 return ret;
248
249 data->resolution = resolution;
250 return ret;
251}
252
253static int fts_wd_set_timeout(struct watchdog_device *wdd, unsigned int timeout)
254{
255 struct fts_data *data;
256 enum WATCHDOG_RESOLUTION resolution = seconds;
257 int ret;
258
259 data = watchdog_get_drvdata(wdd);
260 /* switch watchdog resolution to minutes if timeout does not fit
261 * into a byte
262 */
263 if (timeout > 0xFF) {
264 timeout = DIV_ROUND_UP(timeout, 60) * 60;
265 resolution = minutes;
266 }
267
268 ret = fts_wd_set_resolution(data, resolution);
269 if (ret < 0)
270 return ret;
271
272 wdd->timeout = timeout;
273 return 0;
274}
275
276static int fts_wd_start(struct watchdog_device *wdd)
277{
278 struct fts_data *data = watchdog_get_drvdata(wdd);
279
280 return fts_write_byte(data->client, FTS_WATCHDOG_TIME_PRESET,
281 wdd->timeout / (u8)data->resolution);
282}
283
284static int fts_wd_stop(struct watchdog_device *wdd)
285{
286 struct fts_data *data;
287
288 data = watchdog_get_drvdata(wdd);
289 return fts_write_byte(data->client, FTS_WATCHDOG_TIME_PRESET, 0);
290}
291
292static const struct watchdog_info fts_wd_info = {
293 .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
294 .identity = "FTS Teutates Hardware Watchdog",
295};
296
297static const struct watchdog_ops fts_wd_ops = {
298 .owner = THIS_MODULE,
299 .start = fts_wd_start,
300 .stop = fts_wd_stop,
301 .set_timeout = fts_wd_set_timeout,
302};
303
304static int fts_watchdog_init(struct fts_data *data)
305{
306 int timeout, ret;
307
308 watchdog_set_drvdata(&data->wdd, data);
309
310 timeout = fts_read_byte(data->client, FTS_WATCHDOG_TIME_PRESET);
311 if (timeout < 0)
312 return timeout;
313
314 /* watchdog not running, set timeout to a default of 60 sec. */
315 if (timeout == 0) {
316 ret = fts_wd_set_resolution(data, seconds);
317 if (ret < 0)
318 return ret;
319 data->wdd.timeout = 60;
320 } else {
321 ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL);
322 if (ret < 0)
323 return ret;
324
325 data->resolution = ret & BIT(1) ? seconds : minutes;
326 data->wdd.timeout = timeout * (u8)data->resolution;
327 set_bit(WDOG_HW_RUNNING, &data->wdd.status);
328 }
329
330 /* Register our watchdog part */
331 data->wdd.info = &fts_wd_info;
332 data->wdd.ops = &fts_wd_ops;
333 data->wdd.parent = &data->client->dev;
334 data->wdd.min_timeout = 1;
335
336 /* max timeout 255 minutes. */
337 data->wdd.max_hw_heartbeat_ms = 0xFF * 60 * MSEC_PER_SEC;
338
339 return watchdog_register_device(&data->wdd);
340}
341
342/*****************************************************************************/
343/* SysFS handler functions */
344/*****************************************************************************/
345static ssize_t in_value_show(struct device *dev,
346 struct device_attribute *devattr, char *buf)
347{
348 struct fts_data *data = dev_get_drvdata(dev);
349 int index = to_sensor_dev_attr(devattr)->index;
350 int err;
351
352 err = fts_update_device(data);
353 if (err < 0)
354 return err;
355
356 return sprintf(buf, "%u\n", data->volt[index]);
357}
358
359static ssize_t temp_value_show(struct device *dev,
360 struct device_attribute *devattr, char *buf)
361{
362 struct fts_data *data = dev_get_drvdata(dev);
363 int index = to_sensor_dev_attr(devattr)->index;
364 int err;
365
366 err = fts_update_device(data);
367 if (err < 0)
368 return err;
369
370 return sprintf(buf, "%u\n", data->temp_input[index]);
371}
372
373static ssize_t temp_fault_show(struct device *dev,
374 struct device_attribute *devattr, char *buf)
375{
376 struct fts_data *data = dev_get_drvdata(dev);
377 int index = to_sensor_dev_attr(devattr)->index;
378 int err;
379
380 err = fts_update_device(data);
381 if (err < 0)
382 return err;
383
384 /* 00h Temperature = Sensor Error */
385 return sprintf(buf, "%d\n", data->temp_input[index] == 0);
386}
387
388static ssize_t temp_alarm_show(struct device *dev,
389 struct device_attribute *devattr, char *buf)
390{
391 struct fts_data *data = dev_get_drvdata(dev);
392 int index = to_sensor_dev_attr(devattr)->index;
393 int err;
394
395 err = fts_update_device(data);
396 if (err < 0)
397 return err;
398
399 return sprintf(buf, "%u\n", !!(data->temp_alarm & BIT(index)));
400}
401
402static ssize_t
403temp_alarm_store(struct device *dev, struct device_attribute *devattr,
404 const char *buf, size_t count)
405{
406 struct fts_data *data = dev_get_drvdata(dev);
407 int index = to_sensor_dev_attr(devattr)->index;
408 long ret;
409
410 ret = fts_update_device(data);
411 if (ret < 0)
412 return ret;
413
414 if (kstrtoul(buf, 10, &ret) || ret != 0)
415 return -EINVAL;
416
417 mutex_lock(&data->update_lock);
418 ret = fts_read_byte(data->client, FTS_REG_TEMP_CONTROL(index));
419 if (ret < 0)
420 goto error;
421
422 ret = fts_write_byte(data->client, FTS_REG_TEMP_CONTROL(index),
423 ret | 0x1);
424 if (ret < 0)
425 goto error;
426
427 data->valid = false;
428 ret = count;
429error:
430 mutex_unlock(&data->update_lock);
431 return ret;
432}
433
434static ssize_t fan_value_show(struct device *dev,
435 struct device_attribute *devattr, char *buf)
436{
437 struct fts_data *data = dev_get_drvdata(dev);
438 int index = to_sensor_dev_attr(devattr)->index;
439 int err;
440
441 err = fts_update_device(data);
442 if (err < 0)
443 return err;
444
445 return sprintf(buf, "%u\n", data->fan_input[index]);
446}
447
448static ssize_t fan_source_show(struct device *dev,
449 struct device_attribute *devattr, char *buf)
450{
451 struct fts_data *data = dev_get_drvdata(dev);
452 int index = to_sensor_dev_attr(devattr)->index;
453 int err;
454
455 err = fts_update_device(data);
456 if (err < 0)
457 return err;
458
459 return sprintf(buf, "%u\n", data->fan_source[index]);
460}
461
462static ssize_t fan_alarm_show(struct device *dev,
463 struct device_attribute *devattr, char *buf)
464{
465 struct fts_data *data = dev_get_drvdata(dev);
466 int index = to_sensor_dev_attr(devattr)->index;
467 int err;
468
469 err = fts_update_device(data);
470 if (err < 0)
471 return err;
472
473 return sprintf(buf, "%d\n", !!(data->fan_alarm & BIT(index)));
474}
475
476static ssize_t
477fan_alarm_store(struct device *dev, struct device_attribute *devattr,
478 const char *buf, size_t count)
479{
480 struct fts_data *data = dev_get_drvdata(dev);
481 int index = to_sensor_dev_attr(devattr)->index;
482 long ret;
483
484 ret = fts_update_device(data);
485 if (ret < 0)
486 return ret;
487
488 if (kstrtoul(buf, 10, &ret) || ret != 0)
489 return -EINVAL;
490
491 mutex_lock(&data->update_lock);
492 ret = fts_read_byte(data->client, FTS_REG_FAN_CONTROL(index));
493 if (ret < 0)
494 goto error;
495
496 ret = fts_write_byte(data->client, FTS_REG_FAN_CONTROL(index),
497 ret | 0x1);
498 if (ret < 0)
499 goto error;
500
501 data->valid = false;
502 ret = count;
503error:
504 mutex_unlock(&data->update_lock);
505 return ret;
506}
507
508/*****************************************************************************/
509/* SysFS structs */
510/*****************************************************************************/
511
512/* Temperature sensors */
513static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_value, 0);
514static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_value, 1);
515static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_value, 2);
516static SENSOR_DEVICE_ATTR_RO(temp4_input, temp_value, 3);
517static SENSOR_DEVICE_ATTR_RO(temp5_input, temp_value, 4);
518static SENSOR_DEVICE_ATTR_RO(temp6_input, temp_value, 5);
519static SENSOR_DEVICE_ATTR_RO(temp7_input, temp_value, 6);
520static SENSOR_DEVICE_ATTR_RO(temp8_input, temp_value, 7);
521static SENSOR_DEVICE_ATTR_RO(temp9_input, temp_value, 8);
522static SENSOR_DEVICE_ATTR_RO(temp10_input, temp_value, 9);
523static SENSOR_DEVICE_ATTR_RO(temp11_input, temp_value, 10);
524static SENSOR_DEVICE_ATTR_RO(temp12_input, temp_value, 11);
525static SENSOR_DEVICE_ATTR_RO(temp13_input, temp_value, 12);
526static SENSOR_DEVICE_ATTR_RO(temp14_input, temp_value, 13);
527static SENSOR_DEVICE_ATTR_RO(temp15_input, temp_value, 14);
528static SENSOR_DEVICE_ATTR_RO(temp16_input, temp_value, 15);
529
530static SENSOR_DEVICE_ATTR_RO(temp1_fault, temp_fault, 0);
531static SENSOR_DEVICE_ATTR_RO(temp2_fault, temp_fault, 1);
532static SENSOR_DEVICE_ATTR_RO(temp3_fault, temp_fault, 2);
533static SENSOR_DEVICE_ATTR_RO(temp4_fault, temp_fault, 3);
534static SENSOR_DEVICE_ATTR_RO(temp5_fault, temp_fault, 4);
535static SENSOR_DEVICE_ATTR_RO(temp6_fault, temp_fault, 5);
536static SENSOR_DEVICE_ATTR_RO(temp7_fault, temp_fault, 6);
537static SENSOR_DEVICE_ATTR_RO(temp8_fault, temp_fault, 7);
538static SENSOR_DEVICE_ATTR_RO(temp9_fault, temp_fault, 8);
539static SENSOR_DEVICE_ATTR_RO(temp10_fault, temp_fault, 9);
540static SENSOR_DEVICE_ATTR_RO(temp11_fault, temp_fault, 10);
541static SENSOR_DEVICE_ATTR_RO(temp12_fault, temp_fault, 11);
542static SENSOR_DEVICE_ATTR_RO(temp13_fault, temp_fault, 12);
543static SENSOR_DEVICE_ATTR_RO(temp14_fault, temp_fault, 13);
544static SENSOR_DEVICE_ATTR_RO(temp15_fault, temp_fault, 14);
545static SENSOR_DEVICE_ATTR_RO(temp16_fault, temp_fault, 15);
546
547static SENSOR_DEVICE_ATTR_RW(temp1_alarm, temp_alarm, 0);
548static SENSOR_DEVICE_ATTR_RW(temp2_alarm, temp_alarm, 1);
549static SENSOR_DEVICE_ATTR_RW(temp3_alarm, temp_alarm, 2);
550static SENSOR_DEVICE_ATTR_RW(temp4_alarm, temp_alarm, 3);
551static SENSOR_DEVICE_ATTR_RW(temp5_alarm, temp_alarm, 4);
552static SENSOR_DEVICE_ATTR_RW(temp6_alarm, temp_alarm, 5);
553static SENSOR_DEVICE_ATTR_RW(temp7_alarm, temp_alarm, 6);
554static SENSOR_DEVICE_ATTR_RW(temp8_alarm, temp_alarm, 7);
555static SENSOR_DEVICE_ATTR_RW(temp9_alarm, temp_alarm, 8);
556static SENSOR_DEVICE_ATTR_RW(temp10_alarm, temp_alarm, 9);
557static SENSOR_DEVICE_ATTR_RW(temp11_alarm, temp_alarm, 10);
558static SENSOR_DEVICE_ATTR_RW(temp12_alarm, temp_alarm, 11);
559static SENSOR_DEVICE_ATTR_RW(temp13_alarm, temp_alarm, 12);
560static SENSOR_DEVICE_ATTR_RW(temp14_alarm, temp_alarm, 13);
561static SENSOR_DEVICE_ATTR_RW(temp15_alarm, temp_alarm, 14);
562static SENSOR_DEVICE_ATTR_RW(temp16_alarm, temp_alarm, 15);
563
564static struct attribute *fts_temp_attrs[] = {
565 &sensor_dev_attr_temp1_input.dev_attr.attr,
566 &sensor_dev_attr_temp2_input.dev_attr.attr,
567 &sensor_dev_attr_temp3_input.dev_attr.attr,
568 &sensor_dev_attr_temp4_input.dev_attr.attr,
569 &sensor_dev_attr_temp5_input.dev_attr.attr,
570 &sensor_dev_attr_temp6_input.dev_attr.attr,
571 &sensor_dev_attr_temp7_input.dev_attr.attr,
572 &sensor_dev_attr_temp8_input.dev_attr.attr,
573 &sensor_dev_attr_temp9_input.dev_attr.attr,
574 &sensor_dev_attr_temp10_input.dev_attr.attr,
575 &sensor_dev_attr_temp11_input.dev_attr.attr,
576 &sensor_dev_attr_temp12_input.dev_attr.attr,
577 &sensor_dev_attr_temp13_input.dev_attr.attr,
578 &sensor_dev_attr_temp14_input.dev_attr.attr,
579 &sensor_dev_attr_temp15_input.dev_attr.attr,
580 &sensor_dev_attr_temp16_input.dev_attr.attr,
581
582 &sensor_dev_attr_temp1_fault.dev_attr.attr,
583 &sensor_dev_attr_temp2_fault.dev_attr.attr,
584 &sensor_dev_attr_temp3_fault.dev_attr.attr,
585 &sensor_dev_attr_temp4_fault.dev_attr.attr,
586 &sensor_dev_attr_temp5_fault.dev_attr.attr,
587 &sensor_dev_attr_temp6_fault.dev_attr.attr,
588 &sensor_dev_attr_temp7_fault.dev_attr.attr,
589 &sensor_dev_attr_temp8_fault.dev_attr.attr,
590 &sensor_dev_attr_temp9_fault.dev_attr.attr,
591 &sensor_dev_attr_temp10_fault.dev_attr.attr,
592 &sensor_dev_attr_temp11_fault.dev_attr.attr,
593 &sensor_dev_attr_temp12_fault.dev_attr.attr,
594 &sensor_dev_attr_temp13_fault.dev_attr.attr,
595 &sensor_dev_attr_temp14_fault.dev_attr.attr,
596 &sensor_dev_attr_temp15_fault.dev_attr.attr,
597 &sensor_dev_attr_temp16_fault.dev_attr.attr,
598
599 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
600 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
601 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
602 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
603 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
604 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
605 &sensor_dev_attr_temp7_alarm.dev_attr.attr,
606 &sensor_dev_attr_temp8_alarm.dev_attr.attr,
607 &sensor_dev_attr_temp9_alarm.dev_attr.attr,
608 &sensor_dev_attr_temp10_alarm.dev_attr.attr,
609 &sensor_dev_attr_temp11_alarm.dev_attr.attr,
610 &sensor_dev_attr_temp12_alarm.dev_attr.attr,
611 &sensor_dev_attr_temp13_alarm.dev_attr.attr,
612 &sensor_dev_attr_temp14_alarm.dev_attr.attr,
613 &sensor_dev_attr_temp15_alarm.dev_attr.attr,
614 &sensor_dev_attr_temp16_alarm.dev_attr.attr,
615 NULL
616};
617
618/* Fans */
619static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_value, 0);
620static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_value, 1);
621static SENSOR_DEVICE_ATTR_RO(fan3_input, fan_value, 2);
622static SENSOR_DEVICE_ATTR_RO(fan4_input, fan_value, 3);
623static SENSOR_DEVICE_ATTR_RO(fan5_input, fan_value, 4);
624static SENSOR_DEVICE_ATTR_RO(fan6_input, fan_value, 5);
625static SENSOR_DEVICE_ATTR_RO(fan7_input, fan_value, 6);
626static SENSOR_DEVICE_ATTR_RO(fan8_input, fan_value, 7);
627
628static SENSOR_DEVICE_ATTR_RO(fan1_source, fan_source, 0);
629static SENSOR_DEVICE_ATTR_RO(fan2_source, fan_source, 1);
630static SENSOR_DEVICE_ATTR_RO(fan3_source, fan_source, 2);
631static SENSOR_DEVICE_ATTR_RO(fan4_source, fan_source, 3);
632static SENSOR_DEVICE_ATTR_RO(fan5_source, fan_source, 4);
633static SENSOR_DEVICE_ATTR_RO(fan6_source, fan_source, 5);
634static SENSOR_DEVICE_ATTR_RO(fan7_source, fan_source, 6);
635static SENSOR_DEVICE_ATTR_RO(fan8_source, fan_source, 7);
636
637static SENSOR_DEVICE_ATTR_RW(fan1_alarm, fan_alarm, 0);
638static SENSOR_DEVICE_ATTR_RW(fan2_alarm, fan_alarm, 1);
639static SENSOR_DEVICE_ATTR_RW(fan3_alarm, fan_alarm, 2);
640static SENSOR_DEVICE_ATTR_RW(fan4_alarm, fan_alarm, 3);
641static SENSOR_DEVICE_ATTR_RW(fan5_alarm, fan_alarm, 4);
642static SENSOR_DEVICE_ATTR_RW(fan6_alarm, fan_alarm, 5);
643static SENSOR_DEVICE_ATTR_RW(fan7_alarm, fan_alarm, 6);
644static SENSOR_DEVICE_ATTR_RW(fan8_alarm, fan_alarm, 7);
645
646static struct attribute *fts_fan_attrs[] = {
647 &sensor_dev_attr_fan1_input.dev_attr.attr,
648 &sensor_dev_attr_fan2_input.dev_attr.attr,
649 &sensor_dev_attr_fan3_input.dev_attr.attr,
650 &sensor_dev_attr_fan4_input.dev_attr.attr,
651 &sensor_dev_attr_fan5_input.dev_attr.attr,
652 &sensor_dev_attr_fan6_input.dev_attr.attr,
653 &sensor_dev_attr_fan7_input.dev_attr.attr,
654 &sensor_dev_attr_fan8_input.dev_attr.attr,
655
656 &sensor_dev_attr_fan1_source.dev_attr.attr,
657 &sensor_dev_attr_fan2_source.dev_attr.attr,
658 &sensor_dev_attr_fan3_source.dev_attr.attr,
659 &sensor_dev_attr_fan4_source.dev_attr.attr,
660 &sensor_dev_attr_fan5_source.dev_attr.attr,
661 &sensor_dev_attr_fan6_source.dev_attr.attr,
662 &sensor_dev_attr_fan7_source.dev_attr.attr,
663 &sensor_dev_attr_fan8_source.dev_attr.attr,
664
665 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
666 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
667 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
668 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
669 &sensor_dev_attr_fan5_alarm.dev_attr.attr,
670 &sensor_dev_attr_fan6_alarm.dev_attr.attr,
671 &sensor_dev_attr_fan7_alarm.dev_attr.attr,
672 &sensor_dev_attr_fan8_alarm.dev_attr.attr,
673 NULL
674};
675
676/* Voltages */
677static SENSOR_DEVICE_ATTR_RO(in1_input, in_value, 0);
678static SENSOR_DEVICE_ATTR_RO(in2_input, in_value, 1);
679static SENSOR_DEVICE_ATTR_RO(in3_input, in_value, 2);
680static SENSOR_DEVICE_ATTR_RO(in4_input, in_value, 3);
681static struct attribute *fts_voltage_attrs[] = {
682 &sensor_dev_attr_in1_input.dev_attr.attr,
683 &sensor_dev_attr_in2_input.dev_attr.attr,
684 &sensor_dev_attr_in3_input.dev_attr.attr,
685 &sensor_dev_attr_in4_input.dev_attr.attr,
686 NULL
687};
688
689static const struct attribute_group fts_voltage_attr_group = {
690 .attrs = fts_voltage_attrs
691};
692
693static const struct attribute_group fts_temp_attr_group = {
694 .attrs = fts_temp_attrs
695};
696
697static const struct attribute_group fts_fan_attr_group = {
698 .attrs = fts_fan_attrs
699};
700
701static const struct attribute_group *fts_attr_groups[] = {
702 &fts_voltage_attr_group,
703 &fts_temp_attr_group,
704 &fts_fan_attr_group,
705 NULL
706};
707
708/*****************************************************************************/
709/* Module initialization / remove functions */
710/*****************************************************************************/
711static int fts_detect(struct i2c_client *client,
712 struct i2c_board_info *info)
713{
714 int val;
715
716 /* detection works with revision greater or equal to 0x2b */
717 val = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG);
718 if (val < 0x2b)
719 return -ENODEV;
720
721 /* Device Detect Regs must have 0x17 0x34 and 0x54 */
722 val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_1);
723 if (val != 0x17)
724 return -ENODEV;
725
726 val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_2);
727 if (val != 0x34)
728 return -ENODEV;
729
730 val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_3);
731 if (val != 0x54)
732 return -ENODEV;
733
734 /*
735 * 0x10 == Baseboard Management Controller, 0x01 == Teutates
736 * Device ID Reg needs to be 0x11
737 */
738 val = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG);
739 if (val != 0x11)
740 return -ENODEV;
741
742 strscpy(info->type, fts_id[0].name, I2C_NAME_SIZE);
743 info->flags = 0;
744 return 0;
745}
746
747static void fts_remove(struct i2c_client *client)
748{
749 struct fts_data *data = dev_get_drvdata(&client->dev);
750
751 watchdog_unregister_device(&data->wdd);
752}
753
754static int fts_probe(struct i2c_client *client)
755{
756 u8 revision;
757 struct fts_data *data;
758 int err;
759 s8 deviceid;
760 struct device *hwmon_dev;
761
762 if (client->addr != 0x73)
763 return -ENODEV;
764
765 /* Baseboard Management Controller check */
766 deviceid = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG);
767 if (deviceid > 0 && (deviceid & 0xF0) == 0x10) {
768 switch (deviceid & 0x0F) {
769 case 0x01:
770 break;
771 default:
772 dev_dbg(&client->dev,
773 "No Baseboard Management Controller\n");
774 return -ENODEV;
775 }
776 } else {
777 dev_dbg(&client->dev, "No fujitsu board\n");
778 return -ENODEV;
779 }
780
781 data = devm_kzalloc(&client->dev, sizeof(struct fts_data),
782 GFP_KERNEL);
783 if (!data)
784 return -ENOMEM;
785
786 mutex_init(&data->update_lock);
787 mutex_init(&data->access_lock);
788 data->client = client;
789 dev_set_drvdata(&client->dev, data);
790
791 err = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG);
792 if (err < 0)
793 return err;
794 revision = err;
795
796 hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
797 "ftsteutates",
798 data,
799 fts_attr_groups);
800 if (IS_ERR(hwmon_dev))
801 return PTR_ERR(hwmon_dev);
802
803 err = fts_watchdog_init(data);
804 if (err)
805 return err;
806
807 dev_info(&client->dev, "Detected FTS Teutates chip, revision: %d.%d\n",
808 (revision & 0xF0) >> 4, revision & 0x0F);
809 return 0;
810}
811
812/*****************************************************************************/
813/* Module Details */
814/*****************************************************************************/
815static struct i2c_driver fts_driver = {
816 .class = I2C_CLASS_HWMON,
817 .driver = {
818 .name = "ftsteutates",
819 },
820 .id_table = fts_id,
821 .probe_new = fts_probe,
822 .remove = fts_remove,
823 .detect = fts_detect,
824 .address_list = normal_i2c,
825};
826
827module_i2c_driver(fts_driver);
828
829MODULE_AUTHOR("Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>");
830MODULE_DESCRIPTION("FTS Teutates driver");
831MODULE_LICENSE("GPL");