1/***************************************************************************
2 * Copyright (C) 2011-2012 Hans de Goede <hdegoede@redhat.com> *
3 * *
4 * This program is free software; you can redistribute it and/or modify *
5 * it under the terms of the GNU General Public License as published by *
6 * the Free Software Foundation; either version 2 of the License, or *
7 * (at your option) any later version. *
8 * *
9 * This program is distributed in the hope that it will be useful, *
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
12 * GNU General Public License for more details. *
13 * *
14 * You should have received a copy of the GNU General Public License *
15 * along with this program; if not, write to the *
16 * Free Software Foundation, Inc., *
17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
18 ***************************************************************************/
19
20#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21
22#include <linux/module.h>
23#include <linux/init.h>
24#include <linux/slab.h>
25#include <linux/jiffies.h>
26#include <linux/platform_device.h>
27#include <linux/hwmon.h>
28#include <linux/hwmon-sysfs.h>
29#include <linux/err.h>
30#include <linux/mutex.h>
31#include "sch56xx-common.h"
32
33#define DRVNAME "sch5636"
34#define DEVNAME "theseus" /* We only support one model for now */
35
36#define SCH5636_REG_FUJITSU_ID 0x780
37#define SCH5636_REG_FUJITSU_REV 0x783
38
39#define SCH5636_NO_INS 5
40#define SCH5636_NO_TEMPS 16
41#define SCH5636_NO_FANS 8
42
43static const u16 SCH5636_REG_IN_VAL[SCH5636_NO_INS] = {
44 0x22, 0x23, 0x24, 0x25, 0x189 };
45static const u16 SCH5636_REG_IN_FACTORS[SCH5636_NO_INS] = {
46 4400, 1500, 4000, 4400, 16000 };
47static const char * const SCH5636_IN_LABELS[SCH5636_NO_INS] = {
48 "3.3V", "VREF", "VBAT", "3.3AUX", "12V" };
49
50static const u16 SCH5636_REG_TEMP_VAL[SCH5636_NO_TEMPS] = {
51 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181,
52 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C };
53#define SCH5636_REG_TEMP_CTRL(i) (0x790 + (i))
54#define SCH5636_TEMP_WORKING 0x01
55#define SCH5636_TEMP_ALARM 0x02
56#define SCH5636_TEMP_DEACTIVATED 0x80
57
58static const u16 SCH5636_REG_FAN_VAL[SCH5636_NO_FANS] = {
59 0x2C, 0x2E, 0x30, 0x32, 0x62, 0x64, 0x66, 0x68 };
60#define SCH5636_REG_FAN_CTRL(i) (0x880 + (i))
61/* FAULT in datasheet, but acts as an alarm */
62#define SCH5636_FAN_ALARM 0x04
63#define SCH5636_FAN_NOT_PRESENT 0x08
64#define SCH5636_FAN_DEACTIVATED 0x80
65
66
67struct sch5636_data {
68 unsigned short addr;
69 struct device *hwmon_dev;
70 struct sch56xx_watchdog_data *watchdog;
71
72 struct mutex update_lock;
73 char valid; /* !=0 if following fields are valid */
74 unsigned long last_updated; /* In jiffies */
75 u8 in[SCH5636_NO_INS];
76 u8 temp_val[SCH5636_NO_TEMPS];
77 u8 temp_ctrl[SCH5636_NO_TEMPS];
78 u16 fan_val[SCH5636_NO_FANS];
79 u8 fan_ctrl[SCH5636_NO_FANS];
80};
81
82static struct sch5636_data *sch5636_update_device(struct device *dev)
83{
84 struct sch5636_data *data = dev_get_drvdata(dev);
85 struct sch5636_data *ret = data;
86 int i, val;
87
88 mutex_lock(&data->update_lock);
89
90 /* Cache the values for 1 second */
91 if (data->valid && !time_after(jiffies, data->last_updated + HZ))
92 goto abort;
93
94 for (i = 0; i < SCH5636_NO_INS; i++) {
95 val = sch56xx_read_virtual_reg(data->addr,
96 SCH5636_REG_IN_VAL[i]);
97 if (unlikely(val < 0)) {
98 ret = ERR_PTR(val);
99 goto abort;
100 }
101 data->in[i] = val;
102 }
103
104 for (i = 0; i < SCH5636_NO_TEMPS; i++) {
105 if (data->temp_ctrl[i] & SCH5636_TEMP_DEACTIVATED)
106 continue;
107
108 val = sch56xx_read_virtual_reg(data->addr,
109 SCH5636_REG_TEMP_VAL[i]);
110 if (unlikely(val < 0)) {
111 ret = ERR_PTR(val);
112 goto abort;
113 }
114 data->temp_val[i] = val;
115
116 val = sch56xx_read_virtual_reg(data->addr,
117 SCH5636_REG_TEMP_CTRL(i));
118 if (unlikely(val < 0)) {
119 ret = ERR_PTR(val);
120 goto abort;
121 }
122 data->temp_ctrl[i] = val;
123 /* Alarms need to be explicitly write-cleared */
124 if (val & SCH5636_TEMP_ALARM) {
125 sch56xx_write_virtual_reg(data->addr,
126 SCH5636_REG_TEMP_CTRL(i), val);
127 }
128 }
129
130 for (i = 0; i < SCH5636_NO_FANS; i++) {
131 if (data->fan_ctrl[i] & SCH5636_FAN_DEACTIVATED)
132 continue;
133
134 val = sch56xx_read_virtual_reg16(data->addr,
135 SCH5636_REG_FAN_VAL[i]);
136 if (unlikely(val < 0)) {
137 ret = ERR_PTR(val);
138 goto abort;
139 }
140 data->fan_val[i] = val;
141
142 val = sch56xx_read_virtual_reg(data->addr,
143 SCH5636_REG_FAN_CTRL(i));
144 if (unlikely(val < 0)) {
145 ret = ERR_PTR(val);
146 goto abort;
147 }
148 data->fan_ctrl[i] = val;
149 /* Alarms need to be explicitly write-cleared */
150 if (val & SCH5636_FAN_ALARM) {
151 sch56xx_write_virtual_reg(data->addr,
152 SCH5636_REG_FAN_CTRL(i), val);
153 }
154 }
155
156 data->last_updated = jiffies;
157 data->valid = 1;
158abort:
159 mutex_unlock(&data->update_lock);
160 return ret;
161}
162
163static int reg_to_rpm(u16 reg)
164{
165 if (reg == 0)
166 return -EIO;
167 if (reg == 0xffff)
168 return 0;
169
170 return 5400540 / reg;
171}
172
173static ssize_t name_show(struct device *dev, struct device_attribute *devattr,
174 char *buf)
175{
176 return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
177}
178
179static ssize_t in_value_show(struct device *dev,
180 struct device_attribute *devattr, char *buf)
181{
182 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
183 struct sch5636_data *data = sch5636_update_device(dev);
184 int val;
185
186 if (IS_ERR(data))
187 return PTR_ERR(data);
188
189 val = DIV_ROUND_CLOSEST(
190 data->in[attr->index] * SCH5636_REG_IN_FACTORS[attr->index],
191 255);
192 return snprintf(buf, PAGE_SIZE, "%d\n", val);
193}
194
195static ssize_t in_label_show(struct device *dev,
196 struct device_attribute *devattr, char *buf)
197{
198 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
199
200 return snprintf(buf, PAGE_SIZE, "%s\n",
201 SCH5636_IN_LABELS[attr->index]);
202}
203
204static ssize_t temp_value_show(struct device *dev,
205 struct device_attribute *devattr, char *buf)
206{
207 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
208 struct sch5636_data *data = sch5636_update_device(dev);
209 int val;
210
211 if (IS_ERR(data))
212 return PTR_ERR(data);
213
214 val = (data->temp_val[attr->index] - 64) * 1000;
215 return snprintf(buf, PAGE_SIZE, "%d\n", val);
216}
217
218static ssize_t temp_fault_show(struct device *dev,
219 struct device_attribute *devattr, char *buf)
220{
221 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
222 struct sch5636_data *data = sch5636_update_device(dev);
223 int val;
224
225 if (IS_ERR(data))
226 return PTR_ERR(data);
227
228 val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_WORKING) ? 0 : 1;
229 return snprintf(buf, PAGE_SIZE, "%d\n", val);
230}
231
232static ssize_t temp_alarm_show(struct device *dev,
233 struct device_attribute *devattr, char *buf)
234{
235 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
236 struct sch5636_data *data = sch5636_update_device(dev);
237 int val;
238
239 if (IS_ERR(data))
240 return PTR_ERR(data);
241
242 val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_ALARM) ? 1 : 0;
243 return snprintf(buf, PAGE_SIZE, "%d\n", val);
244}
245
246static ssize_t fan_value_show(struct device *dev,
247 struct device_attribute *devattr, char *buf)
248{
249 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
250 struct sch5636_data *data = sch5636_update_device(dev);
251 int val;
252
253 if (IS_ERR(data))
254 return PTR_ERR(data);
255
256 val = reg_to_rpm(data->fan_val[attr->index]);
257 if (val < 0)
258 return val;
259
260 return snprintf(buf, PAGE_SIZE, "%d\n", val);
261}
262
263static ssize_t fan_fault_show(struct device *dev,
264 struct device_attribute *devattr, char *buf)
265{
266 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
267 struct sch5636_data *data = sch5636_update_device(dev);
268 int val;
269
270 if (IS_ERR(data))
271 return PTR_ERR(data);
272
273 val = (data->fan_ctrl[attr->index] & SCH5636_FAN_NOT_PRESENT) ? 1 : 0;
274 return snprintf(buf, PAGE_SIZE, "%d\n", val);
275}
276
277static ssize_t fan_alarm_show(struct device *dev,
278 struct device_attribute *devattr, char *buf)
279{
280 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
281 struct sch5636_data *data = sch5636_update_device(dev);
282 int val;
283
284 if (IS_ERR(data))
285 return PTR_ERR(data);
286
287 val = (data->fan_ctrl[attr->index] & SCH5636_FAN_ALARM) ? 1 : 0;
288 return snprintf(buf, PAGE_SIZE, "%d\n", val);
289}
290
291static struct sensor_device_attribute sch5636_attr[] = {
292 SENSOR_ATTR_RO(name, name, 0),
293 SENSOR_ATTR_RO(in0_input, in_value, 0),
294 SENSOR_ATTR_RO(in0_label, in_label, 0),
295 SENSOR_ATTR_RO(in1_input, in_value, 1),
296 SENSOR_ATTR_RO(in1_label, in_label, 1),
297 SENSOR_ATTR_RO(in2_input, in_value, 2),
298 SENSOR_ATTR_RO(in2_label, in_label, 2),
299 SENSOR_ATTR_RO(in3_input, in_value, 3),
300 SENSOR_ATTR_RO(in3_label, in_label, 3),
301 SENSOR_ATTR_RO(in4_input, in_value, 4),
302 SENSOR_ATTR_RO(in4_label, in_label, 4),
303};
304
305static struct sensor_device_attribute sch5636_temp_attr[] = {
306 SENSOR_ATTR_RO(temp1_input, temp_value, 0),
307 SENSOR_ATTR_RO(temp1_fault, temp_fault, 0),
308 SENSOR_ATTR_RO(temp1_alarm, temp_alarm, 0),
309 SENSOR_ATTR_RO(temp2_input, temp_value, 1),
310 SENSOR_ATTR_RO(temp2_fault, temp_fault, 1),
311 SENSOR_ATTR_RO(temp2_alarm, temp_alarm, 1),
312 SENSOR_ATTR_RO(temp3_input, temp_value, 2),
313 SENSOR_ATTR_RO(temp3_fault, temp_fault, 2),
314 SENSOR_ATTR_RO(temp3_alarm, temp_alarm, 2),
315 SENSOR_ATTR_RO(temp4_input, temp_value, 3),
316 SENSOR_ATTR_RO(temp4_fault, temp_fault, 3),
317 SENSOR_ATTR_RO(temp4_alarm, temp_alarm, 3),
318 SENSOR_ATTR_RO(temp5_input, temp_value, 4),
319 SENSOR_ATTR_RO(temp5_fault, temp_fault, 4),
320 SENSOR_ATTR_RO(temp5_alarm, temp_alarm, 4),
321 SENSOR_ATTR_RO(temp6_input, temp_value, 5),
322 SENSOR_ATTR_RO(temp6_fault, temp_fault, 5),
323 SENSOR_ATTR_RO(temp6_alarm, temp_alarm, 5),
324 SENSOR_ATTR_RO(temp7_input, temp_value, 6),
325 SENSOR_ATTR_RO(temp7_fault, temp_fault, 6),
326 SENSOR_ATTR_RO(temp7_alarm, temp_alarm, 6),
327 SENSOR_ATTR_RO(temp8_input, temp_value, 7),
328 SENSOR_ATTR_RO(temp8_fault, temp_fault, 7),
329 SENSOR_ATTR_RO(temp8_alarm, temp_alarm, 7),
330 SENSOR_ATTR_RO(temp9_input, temp_value, 8),
331 SENSOR_ATTR_RO(temp9_fault, temp_fault, 8),
332 SENSOR_ATTR_RO(temp9_alarm, temp_alarm, 8),
333 SENSOR_ATTR_RO(temp10_input, temp_value, 9),
334 SENSOR_ATTR_RO(temp10_fault, temp_fault, 9),
335 SENSOR_ATTR_RO(temp10_alarm, temp_alarm, 9),
336 SENSOR_ATTR_RO(temp11_input, temp_value, 10),
337 SENSOR_ATTR_RO(temp11_fault, temp_fault, 10),
338 SENSOR_ATTR_RO(temp11_alarm, temp_alarm, 10),
339 SENSOR_ATTR_RO(temp12_input, temp_value, 11),
340 SENSOR_ATTR_RO(temp12_fault, temp_fault, 11),
341 SENSOR_ATTR_RO(temp12_alarm, temp_alarm, 11),
342 SENSOR_ATTR_RO(temp13_input, temp_value, 12),
343 SENSOR_ATTR_RO(temp13_fault, temp_fault, 12),
344 SENSOR_ATTR_RO(temp13_alarm, temp_alarm, 12),
345 SENSOR_ATTR_RO(temp14_input, temp_value, 13),
346 SENSOR_ATTR_RO(temp14_fault, temp_fault, 13),
347 SENSOR_ATTR_RO(temp14_alarm, temp_alarm, 13),
348 SENSOR_ATTR_RO(temp15_input, temp_value, 14),
349 SENSOR_ATTR_RO(temp15_fault, temp_fault, 14),
350 SENSOR_ATTR_RO(temp15_alarm, temp_alarm, 14),
351 SENSOR_ATTR_RO(temp16_input, temp_value, 15),
352 SENSOR_ATTR_RO(temp16_fault, temp_fault, 15),
353 SENSOR_ATTR_RO(temp16_alarm, temp_alarm, 15),
354};
355
356static struct sensor_device_attribute sch5636_fan_attr[] = {
357 SENSOR_ATTR_RO(fan1_input, fan_value, 0),
358 SENSOR_ATTR_RO(fan1_fault, fan_fault, 0),
359 SENSOR_ATTR_RO(fan1_alarm, fan_alarm, 0),
360 SENSOR_ATTR_RO(fan2_input, fan_value, 1),
361 SENSOR_ATTR_RO(fan2_fault, fan_fault, 1),
362 SENSOR_ATTR_RO(fan2_alarm, fan_alarm, 1),
363 SENSOR_ATTR_RO(fan3_input, fan_value, 2),
364 SENSOR_ATTR_RO(fan3_fault, fan_fault, 2),
365 SENSOR_ATTR_RO(fan3_alarm, fan_alarm, 2),
366 SENSOR_ATTR_RO(fan4_input, fan_value, 3),
367 SENSOR_ATTR_RO(fan4_fault, fan_fault, 3),
368 SENSOR_ATTR_RO(fan4_alarm, fan_alarm, 3),
369 SENSOR_ATTR_RO(fan5_input, fan_value, 4),
370 SENSOR_ATTR_RO(fan5_fault, fan_fault, 4),
371 SENSOR_ATTR_RO(fan5_alarm, fan_alarm, 4),
372 SENSOR_ATTR_RO(fan6_input, fan_value, 5),
373 SENSOR_ATTR_RO(fan6_fault, fan_fault, 5),
374 SENSOR_ATTR_RO(fan6_alarm, fan_alarm, 5),
375 SENSOR_ATTR_RO(fan7_input, fan_value, 6),
376 SENSOR_ATTR_RO(fan7_fault, fan_fault, 6),
377 SENSOR_ATTR_RO(fan7_alarm, fan_alarm, 6),
378 SENSOR_ATTR_RO(fan8_input, fan_value, 7),
379 SENSOR_ATTR_RO(fan8_fault, fan_fault, 7),
380 SENSOR_ATTR_RO(fan8_alarm, fan_alarm, 7),
381};
382
383static int sch5636_remove(struct platform_device *pdev)
384{
385 struct sch5636_data *data = platform_get_drvdata(pdev);
386 int i;
387
388 if (data->watchdog)
389 sch56xx_watchdog_unregister(data->watchdog);
390
391 if (data->hwmon_dev)
392 hwmon_device_unregister(data->hwmon_dev);
393
394 for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++)
395 device_remove_file(&pdev->dev, &sch5636_attr[i].dev_attr);
396
397 for (i = 0; i < SCH5636_NO_TEMPS * 3; i++)
398 device_remove_file(&pdev->dev,
399 &sch5636_temp_attr[i].dev_attr);
400
401 for (i = 0; i < SCH5636_NO_FANS * 3; i++)
402 device_remove_file(&pdev->dev,
403 &sch5636_fan_attr[i].dev_attr);
404
405 return 0;
406}
407
408static int sch5636_probe(struct platform_device *pdev)
409{
410 struct sch5636_data *data;
411 int i, err, val, revision[2];
412 char id[4];
413
414 data = devm_kzalloc(&pdev->dev, sizeof(struct sch5636_data),
415 GFP_KERNEL);
416 if (!data)
417 return -ENOMEM;
418
419 data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
420 mutex_init(&data->update_lock);
421 platform_set_drvdata(pdev, data);
422
423 for (i = 0; i < 3; i++) {
424 val = sch56xx_read_virtual_reg(data->addr,
425 SCH5636_REG_FUJITSU_ID + i);
426 if (val < 0) {
427 pr_err("Could not read Fujitsu id byte at %#x\n",
428 SCH5636_REG_FUJITSU_ID + i);
429 err = val;
430 goto error;
431 }
432 id[i] = val;
433 }
434 id[i] = '\0';
435
436 if (strcmp(id, "THS")) {
437 pr_err("Unknown Fujitsu id: %02x%02x%02x\n",
438 id[0], id[1], id[2]);
439 err = -ENODEV;
440 goto error;
441 }
442
443 for (i = 0; i < 2; i++) {
444 val = sch56xx_read_virtual_reg(data->addr,
445 SCH5636_REG_FUJITSU_REV + i);
446 if (val < 0) {
447 err = val;
448 goto error;
449 }
450 revision[i] = val;
451 }
452 pr_info("Found %s chip at %#hx, revision: %d.%02d\n", DEVNAME,
453 data->addr, revision[0], revision[1]);
454
455 /* Read all temp + fan ctrl registers to determine which are active */
456 for (i = 0; i < SCH5636_NO_TEMPS; i++) {
457 val = sch56xx_read_virtual_reg(data->addr,
458 SCH5636_REG_TEMP_CTRL(i));
459 if (unlikely(val < 0)) {
460 err = val;
461 goto error;
462 }
463 data->temp_ctrl[i] = val;
464 }
465
466 for (i = 0; i < SCH5636_NO_FANS; i++) {
467 val = sch56xx_read_virtual_reg(data->addr,
468 SCH5636_REG_FAN_CTRL(i));
469 if (unlikely(val < 0)) {
470 err = val;
471 goto error;
472 }
473 data->fan_ctrl[i] = val;
474 }
475
476 for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++) {
477 err = device_create_file(&pdev->dev,
478 &sch5636_attr[i].dev_attr);
479 if (err)
480 goto error;
481 }
482
483 for (i = 0; i < (SCH5636_NO_TEMPS * 3); i++) {
484 if (data->temp_ctrl[i/3] & SCH5636_TEMP_DEACTIVATED)
485 continue;
486
487 err = device_create_file(&pdev->dev,
488 &sch5636_temp_attr[i].dev_attr);
489 if (err)
490 goto error;
491 }
492
493 for (i = 0; i < (SCH5636_NO_FANS * 3); i++) {
494 if (data->fan_ctrl[i/3] & SCH5636_FAN_DEACTIVATED)
495 continue;
496
497 err = device_create_file(&pdev->dev,
498 &sch5636_fan_attr[i].dev_attr);
499 if (err)
500 goto error;
501 }
502
503 data->hwmon_dev = hwmon_device_register(&pdev->dev);
504 if (IS_ERR(data->hwmon_dev)) {
505 err = PTR_ERR(data->hwmon_dev);
506 data->hwmon_dev = NULL;
507 goto error;
508 }
509
510 /* Note failing to register the watchdog is not a fatal error */
511 data->watchdog = sch56xx_watchdog_register(&pdev->dev, data->addr,
512 (revision[0] << 8) | revision[1],
513 &data->update_lock, 0);
514
515 return 0;
516
517error:
518 sch5636_remove(pdev);
519 return err;
520}
521
522static struct platform_driver sch5636_driver = {
523 .driver = {
524 .name = DRVNAME,
525 },
526 .probe = sch5636_probe,
527 .remove = sch5636_remove,
528};
529
530module_platform_driver(sch5636_driver);
531
532MODULE_DESCRIPTION("SMSC SCH5636 Hardware Monitoring Driver");
533MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
534MODULE_LICENSE("GPL");
535