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 const 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 in_value_show(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 temp_value_show(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 temp_fault_show(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 temp_alarm_show(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
413temp_alarm_store(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;
438 ret = count;
439error:
440 mutex_unlock(&data->update_lock);
441 return ret;
442}
443
444static ssize_t fan_value_show(struct device *dev,
445 struct device_attribute *devattr, char *buf)
446{
447 struct fts_data *data = dev_get_drvdata(dev);
448 int index = to_sensor_dev_attr(devattr)->index;
449 int err;
450
451 err = fts_update_device(data);
452 if (err < 0)
453 return err;
454
455 return sprintf(buf, "%u\n", data->fan_input[index]);
456}
457
458static ssize_t fan_source_show(struct device *dev,
459 struct device_attribute *devattr, char *buf)
460{
461 struct fts_data *data = dev_get_drvdata(dev);
462 int index = to_sensor_dev_attr(devattr)->index;
463 int err;
464
465 err = fts_update_device(data);
466 if (err < 0)
467 return err;
468
469 return sprintf(buf, "%u\n", data->fan_source[index]);
470}
471
472static ssize_t fan_alarm_show(struct device *dev,
473 struct device_attribute *devattr, char *buf)
474{
475 struct fts_data *data = dev_get_drvdata(dev);
476 int index = to_sensor_dev_attr(devattr)->index;
477 int err;
478
479 err = fts_update_device(data);
480 if (err < 0)
481 return err;
482
483 return sprintf(buf, "%d\n", !!(data->fan_alarm & BIT(index)));
484}
485
486static ssize_t
487fan_alarm_store(struct device *dev, struct device_attribute *devattr,
488 const char *buf, size_t count)
489{
490 struct fts_data *data = dev_get_drvdata(dev);
491 int index = to_sensor_dev_attr(devattr)->index;
492 long ret;
493
494 ret = fts_update_device(data);
495 if (ret < 0)
496 return ret;
497
498 if (kstrtoul(buf, 10, &ret) || ret != 0)
499 return -EINVAL;
500
501 mutex_lock(&data->update_lock);
502 ret = fts_read_byte(data->client, FTS_REG_FAN_CONTROL(index));
503 if (ret < 0)
504 goto error;
505
506 ret = fts_write_byte(data->client, FTS_REG_FAN_CONTROL(index),
507 ret | 0x1);
508 if (ret < 0)
509 goto error;
510
511 data->valid = false;
512 ret = count;
513error:
514 mutex_unlock(&data->update_lock);
515 return ret;
516}
517
518/*****************************************************************************/
519/* SysFS structs */
520/*****************************************************************************/
521
522/* Temprature sensors */
523static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_value, 0);
524static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_value, 1);
525static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_value, 2);
526static SENSOR_DEVICE_ATTR_RO(temp4_input, temp_value, 3);
527static SENSOR_DEVICE_ATTR_RO(temp5_input, temp_value, 4);
528static SENSOR_DEVICE_ATTR_RO(temp6_input, temp_value, 5);
529static SENSOR_DEVICE_ATTR_RO(temp7_input, temp_value, 6);
530static SENSOR_DEVICE_ATTR_RO(temp8_input, temp_value, 7);
531static SENSOR_DEVICE_ATTR_RO(temp9_input, temp_value, 8);
532static SENSOR_DEVICE_ATTR_RO(temp10_input, temp_value, 9);
533static SENSOR_DEVICE_ATTR_RO(temp11_input, temp_value, 10);
534static SENSOR_DEVICE_ATTR_RO(temp12_input, temp_value, 11);
535static SENSOR_DEVICE_ATTR_RO(temp13_input, temp_value, 12);
536static SENSOR_DEVICE_ATTR_RO(temp14_input, temp_value, 13);
537static SENSOR_DEVICE_ATTR_RO(temp15_input, temp_value, 14);
538static SENSOR_DEVICE_ATTR_RO(temp16_input, temp_value, 15);
539
540static SENSOR_DEVICE_ATTR_RO(temp1_fault, temp_fault, 0);
541static SENSOR_DEVICE_ATTR_RO(temp2_fault, temp_fault, 1);
542static SENSOR_DEVICE_ATTR_RO(temp3_fault, temp_fault, 2);
543static SENSOR_DEVICE_ATTR_RO(temp4_fault, temp_fault, 3);
544static SENSOR_DEVICE_ATTR_RO(temp5_fault, temp_fault, 4);
545static SENSOR_DEVICE_ATTR_RO(temp6_fault, temp_fault, 5);
546static SENSOR_DEVICE_ATTR_RO(temp7_fault, temp_fault, 6);
547static SENSOR_DEVICE_ATTR_RO(temp8_fault, temp_fault, 7);
548static SENSOR_DEVICE_ATTR_RO(temp9_fault, temp_fault, 8);
549static SENSOR_DEVICE_ATTR_RO(temp10_fault, temp_fault, 9);
550static SENSOR_DEVICE_ATTR_RO(temp11_fault, temp_fault, 10);
551static SENSOR_DEVICE_ATTR_RO(temp12_fault, temp_fault, 11);
552static SENSOR_DEVICE_ATTR_RO(temp13_fault, temp_fault, 12);
553static SENSOR_DEVICE_ATTR_RO(temp14_fault, temp_fault, 13);
554static SENSOR_DEVICE_ATTR_RO(temp15_fault, temp_fault, 14);
555static SENSOR_DEVICE_ATTR_RO(temp16_fault, temp_fault, 15);
556
557static SENSOR_DEVICE_ATTR_RW(temp1_alarm, temp_alarm, 0);
558static SENSOR_DEVICE_ATTR_RW(temp2_alarm, temp_alarm, 1);
559static SENSOR_DEVICE_ATTR_RW(temp3_alarm, temp_alarm, 2);
560static SENSOR_DEVICE_ATTR_RW(temp4_alarm, temp_alarm, 3);
561static SENSOR_DEVICE_ATTR_RW(temp5_alarm, temp_alarm, 4);
562static SENSOR_DEVICE_ATTR_RW(temp6_alarm, temp_alarm, 5);
563static SENSOR_DEVICE_ATTR_RW(temp7_alarm, temp_alarm, 6);
564static SENSOR_DEVICE_ATTR_RW(temp8_alarm, temp_alarm, 7);
565static SENSOR_DEVICE_ATTR_RW(temp9_alarm, temp_alarm, 8);
566static SENSOR_DEVICE_ATTR_RW(temp10_alarm, temp_alarm, 9);
567static SENSOR_DEVICE_ATTR_RW(temp11_alarm, temp_alarm, 10);
568static SENSOR_DEVICE_ATTR_RW(temp12_alarm, temp_alarm, 11);
569static SENSOR_DEVICE_ATTR_RW(temp13_alarm, temp_alarm, 12);
570static SENSOR_DEVICE_ATTR_RW(temp14_alarm, temp_alarm, 13);
571static SENSOR_DEVICE_ATTR_RW(temp15_alarm, temp_alarm, 14);
572static SENSOR_DEVICE_ATTR_RW(temp16_alarm, temp_alarm, 15);
573
574static struct attribute *fts_temp_attrs[] = {
575 &sensor_dev_attr_temp1_input.dev_attr.attr,
576 &sensor_dev_attr_temp2_input.dev_attr.attr,
577 &sensor_dev_attr_temp3_input.dev_attr.attr,
578 &sensor_dev_attr_temp4_input.dev_attr.attr,
579 &sensor_dev_attr_temp5_input.dev_attr.attr,
580 &sensor_dev_attr_temp6_input.dev_attr.attr,
581 &sensor_dev_attr_temp7_input.dev_attr.attr,
582 &sensor_dev_attr_temp8_input.dev_attr.attr,
583 &sensor_dev_attr_temp9_input.dev_attr.attr,
584 &sensor_dev_attr_temp10_input.dev_attr.attr,
585 &sensor_dev_attr_temp11_input.dev_attr.attr,
586 &sensor_dev_attr_temp12_input.dev_attr.attr,
587 &sensor_dev_attr_temp13_input.dev_attr.attr,
588 &sensor_dev_attr_temp14_input.dev_attr.attr,
589 &sensor_dev_attr_temp15_input.dev_attr.attr,
590 &sensor_dev_attr_temp16_input.dev_attr.attr,
591
592 &sensor_dev_attr_temp1_fault.dev_attr.attr,
593 &sensor_dev_attr_temp2_fault.dev_attr.attr,
594 &sensor_dev_attr_temp3_fault.dev_attr.attr,
595 &sensor_dev_attr_temp4_fault.dev_attr.attr,
596 &sensor_dev_attr_temp5_fault.dev_attr.attr,
597 &sensor_dev_attr_temp6_fault.dev_attr.attr,
598 &sensor_dev_attr_temp7_fault.dev_attr.attr,
599 &sensor_dev_attr_temp8_fault.dev_attr.attr,
600 &sensor_dev_attr_temp9_fault.dev_attr.attr,
601 &sensor_dev_attr_temp10_fault.dev_attr.attr,
602 &sensor_dev_attr_temp11_fault.dev_attr.attr,
603 &sensor_dev_attr_temp12_fault.dev_attr.attr,
604 &sensor_dev_attr_temp13_fault.dev_attr.attr,
605 &sensor_dev_attr_temp14_fault.dev_attr.attr,
606 &sensor_dev_attr_temp15_fault.dev_attr.attr,
607 &sensor_dev_attr_temp16_fault.dev_attr.attr,
608
609 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
610 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
611 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
612 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
613 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
614 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
615 &sensor_dev_attr_temp7_alarm.dev_attr.attr,
616 &sensor_dev_attr_temp8_alarm.dev_attr.attr,
617 &sensor_dev_attr_temp9_alarm.dev_attr.attr,
618 &sensor_dev_attr_temp10_alarm.dev_attr.attr,
619 &sensor_dev_attr_temp11_alarm.dev_attr.attr,
620 &sensor_dev_attr_temp12_alarm.dev_attr.attr,
621 &sensor_dev_attr_temp13_alarm.dev_attr.attr,
622 &sensor_dev_attr_temp14_alarm.dev_attr.attr,
623 &sensor_dev_attr_temp15_alarm.dev_attr.attr,
624 &sensor_dev_attr_temp16_alarm.dev_attr.attr,
625 NULL
626};
627
628/* Fans */
629static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_value, 0);
630static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_value, 1);
631static SENSOR_DEVICE_ATTR_RO(fan3_input, fan_value, 2);
632static SENSOR_DEVICE_ATTR_RO(fan4_input, fan_value, 3);
633static SENSOR_DEVICE_ATTR_RO(fan5_input, fan_value, 4);
634static SENSOR_DEVICE_ATTR_RO(fan6_input, fan_value, 5);
635static SENSOR_DEVICE_ATTR_RO(fan7_input, fan_value, 6);
636static SENSOR_DEVICE_ATTR_RO(fan8_input, fan_value, 7);
637
638static SENSOR_DEVICE_ATTR_RO(fan1_source, fan_source, 0);
639static SENSOR_DEVICE_ATTR_RO(fan2_source, fan_source, 1);
640static SENSOR_DEVICE_ATTR_RO(fan3_source, fan_source, 2);
641static SENSOR_DEVICE_ATTR_RO(fan4_source, fan_source, 3);
642static SENSOR_DEVICE_ATTR_RO(fan5_source, fan_source, 4);
643static SENSOR_DEVICE_ATTR_RO(fan6_source, fan_source, 5);
644static SENSOR_DEVICE_ATTR_RO(fan7_source, fan_source, 6);
645static SENSOR_DEVICE_ATTR_RO(fan8_source, fan_source, 7);
646
647static SENSOR_DEVICE_ATTR_RW(fan1_alarm, fan_alarm, 0);
648static SENSOR_DEVICE_ATTR_RW(fan2_alarm, fan_alarm, 1);
649static SENSOR_DEVICE_ATTR_RW(fan3_alarm, fan_alarm, 2);
650static SENSOR_DEVICE_ATTR_RW(fan4_alarm, fan_alarm, 3);
651static SENSOR_DEVICE_ATTR_RW(fan5_alarm, fan_alarm, 4);
652static SENSOR_DEVICE_ATTR_RW(fan6_alarm, fan_alarm, 5);
653static SENSOR_DEVICE_ATTR_RW(fan7_alarm, fan_alarm, 6);
654static SENSOR_DEVICE_ATTR_RW(fan8_alarm, fan_alarm, 7);
655
656static struct attribute *fts_fan_attrs[] = {
657 &sensor_dev_attr_fan1_input.dev_attr.attr,
658 &sensor_dev_attr_fan2_input.dev_attr.attr,
659 &sensor_dev_attr_fan3_input.dev_attr.attr,
660 &sensor_dev_attr_fan4_input.dev_attr.attr,
661 &sensor_dev_attr_fan5_input.dev_attr.attr,
662 &sensor_dev_attr_fan6_input.dev_attr.attr,
663 &sensor_dev_attr_fan7_input.dev_attr.attr,
664 &sensor_dev_attr_fan8_input.dev_attr.attr,
665
666 &sensor_dev_attr_fan1_source.dev_attr.attr,
667 &sensor_dev_attr_fan2_source.dev_attr.attr,
668 &sensor_dev_attr_fan3_source.dev_attr.attr,
669 &sensor_dev_attr_fan4_source.dev_attr.attr,
670 &sensor_dev_attr_fan5_source.dev_attr.attr,
671 &sensor_dev_attr_fan6_source.dev_attr.attr,
672 &sensor_dev_attr_fan7_source.dev_attr.attr,
673 &sensor_dev_attr_fan8_source.dev_attr.attr,
674
675 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
676 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
677 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
678 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
679 &sensor_dev_attr_fan5_alarm.dev_attr.attr,
680 &sensor_dev_attr_fan6_alarm.dev_attr.attr,
681 &sensor_dev_attr_fan7_alarm.dev_attr.attr,
682 &sensor_dev_attr_fan8_alarm.dev_attr.attr,
683 NULL
684};
685
686/* Voltages */
687static SENSOR_DEVICE_ATTR_RO(in1_input, in_value, 0);
688static SENSOR_DEVICE_ATTR_RO(in2_input, in_value, 1);
689static SENSOR_DEVICE_ATTR_RO(in3_input, in_value, 2);
690static SENSOR_DEVICE_ATTR_RO(in4_input, in_value, 3);
691static struct attribute *fts_voltage_attrs[] = {
692 &sensor_dev_attr_in1_input.dev_attr.attr,
693 &sensor_dev_attr_in2_input.dev_attr.attr,
694 &sensor_dev_attr_in3_input.dev_attr.attr,
695 &sensor_dev_attr_in4_input.dev_attr.attr,
696 NULL
697};
698
699static const struct attribute_group fts_voltage_attr_group = {
700 .attrs = fts_voltage_attrs
701};
702
703static const struct attribute_group fts_temp_attr_group = {
704 .attrs = fts_temp_attrs
705};
706
707static const struct attribute_group fts_fan_attr_group = {
708 .attrs = fts_fan_attrs
709};
710
711static const struct attribute_group *fts_attr_groups[] = {
712 &fts_voltage_attr_group,
713 &fts_temp_attr_group,
714 &fts_fan_attr_group,
715 NULL
716};
717
718/*****************************************************************************/
719/* Module initialization / remove functions */
720/*****************************************************************************/
721static int fts_detect(struct i2c_client *client,
722 struct i2c_board_info *info)
723{
724 int val;
725
726 /* detection works with revsion greater or equal to 0x2b */
727 val = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG);
728 if (val < 0x2b)
729 return -ENODEV;
730
731 /* Device Detect Regs must have 0x17 0x34 and 0x54 */
732 val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_1);
733 if (val != 0x17)
734 return -ENODEV;
735
736 val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_2);
737 if (val != 0x34)
738 return -ENODEV;
739
740 val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_3);
741 if (val != 0x54)
742 return -ENODEV;
743
744 /*
745 * 0x10 == Baseboard Management Controller, 0x01 == Teutates
746 * Device ID Reg needs to be 0x11
747 */
748 val = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG);
749 if (val != 0x11)
750 return -ENODEV;
751
752 strlcpy(info->type, fts_id[0].name, I2C_NAME_SIZE);
753 info->flags = 0;
754 return 0;
755}
756
757static int fts_remove(struct i2c_client *client)
758{
759 struct fts_data *data = dev_get_drvdata(&client->dev);
760
761 watchdog_unregister_device(&data->wdd);
762 return 0;
763}
764
765static int fts_probe(struct i2c_client *client, const struct i2c_device_id *id)
766{
767 u8 revision;
768 struct fts_data *data;
769 int err;
770 s8 deviceid;
771 struct device *hwmon_dev;
772
773 if (client->addr != 0x73)
774 return -ENODEV;
775
776 /* Baseboard Management Controller check */
777 deviceid = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG);
778 if (deviceid > 0 && (deviceid & 0xF0) == 0x10) {
779 switch (deviceid & 0x0F) {
780 case 0x01:
781 break;
782 default:
783 dev_dbg(&client->dev,
784 "No Baseboard Management Controller\n");
785 return -ENODEV;
786 }
787 } else {
788 dev_dbg(&client->dev, "No fujitsu board\n");
789 return -ENODEV;
790 }
791
792 data = devm_kzalloc(&client->dev, sizeof(struct fts_data),
793 GFP_KERNEL);
794 if (!data)
795 return -ENOMEM;
796
797 mutex_init(&data->update_lock);
798 mutex_init(&data->access_lock);
799 data->client = client;
800 dev_set_drvdata(&client->dev, data);
801
802 err = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG);
803 if (err < 0)
804 return err;
805 revision = err;
806
807 hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
808 "ftsteutates",
809 data,
810 fts_attr_groups);
811 if (IS_ERR(hwmon_dev))
812 return PTR_ERR(hwmon_dev);
813
814 err = fts_watchdog_init(data);
815 if (err)
816 return err;
817
818 dev_info(&client->dev, "Detected FTS Teutates chip, revision: %d.%d\n",
819 (revision & 0xF0) >> 4, revision & 0x0F);
820 return 0;
821}
822
823/*****************************************************************************/
824/* Module Details */
825/*****************************************************************************/
826static struct i2c_driver fts_driver = {
827 .class = I2C_CLASS_HWMON,
828 .driver = {
829 .name = "ftsteutates",
830 },
831 .id_table = fts_id,
832 .probe = fts_probe,
833 .remove = fts_remove,
834 .detect = fts_detect,
835 .address_list = normal_i2c,
836};
837
838module_i2c_driver(fts_driver);
839
840MODULE_AUTHOR("Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>");
841MODULE_DESCRIPTION("FTS Teutates driver");
842MODULE_LICENSE("GPL");
843