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  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");