1/*
2 * nct6683 - Driver for the hardware monitoring functionality of
3 * Nuvoton NCT6683D eSIO
4 *
5 * Copyright (C) 2013 Guenter Roeck <linux@roeck-us.net>
6 *
7 * Derived from nct6775 driver
8 * Copyright (C) 2012, 2013 Guenter Roeck <linux@roeck-us.net>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * Supports the following chips:
21 *
22 * Chip #vin #fan #pwm #temp chip ID
23 * nct6683d 21(1) 16 8 32(1) 0xc730
24 *
25 * Notes:
26 * (1) Total number of vin and temp inputs is 32.
27 */
28
29#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
30
31#include <linux/acpi.h>
32#include <linux/delay.h>
33#include <linux/err.h>
34#include <linux/init.h>
35#include <linux/io.h>
36#include <linux/jiffies.h>
37#include <linux/hwmon.h>
38#include <linux/hwmon-sysfs.h>
39#include <linux/module.h>
40#include <linux/mutex.h>
41#include <linux/platform_device.h>
42#include <linux/slab.h>
43
44enum kinds { nct6683 };
45
46static bool force;
47module_param(force, bool, 0);
48MODULE_PARM_DESC(force, "Set to one to enable support for unknown vendors");
49
50static const char * const nct6683_device_names[] = {
51 "nct6683",
52};
53
54static const char * const nct6683_chip_names[] = {
55 "NCT6683D",
56};
57
58#define DRVNAME "nct6683"
59
60/*
61 * Super-I/O constants and functions
62 */
63
64#define NCT6683_LD_ACPI 0x0a
65#define NCT6683_LD_HWM 0x0b
66#define NCT6683_LD_VID 0x0d
67
68#define SIO_REG_LDSEL 0x07 /* Logical device select */
69#define SIO_REG_DEVID 0x20 /* Device ID (2 bytes) */
70#define SIO_REG_ENABLE 0x30 /* Logical device enable */
71#define SIO_REG_ADDR 0x60 /* Logical device address (2 bytes) */
72
73#define SIO_NCT6681_ID 0xb270 /* for later */
74#define SIO_NCT6683_ID 0xc730
75#define SIO_ID_MASK 0xFFF0
76
77static inline void
78superio_outb(int ioreg, int reg, int val)
79{
80 outb(reg, ioreg);
81 outb(val, ioreg + 1);
82}
83
84static inline int
85superio_inb(int ioreg, int reg)
86{
87 outb(reg, ioreg);
88 return inb(ioreg + 1);
89}
90
91static inline void
92superio_select(int ioreg, int ld)
93{
94 outb(SIO_REG_LDSEL, ioreg);
95 outb(ld, ioreg + 1);
96}
97
98static inline int
99superio_enter(int ioreg)
100{
101 /*
102 * Try to reserve <ioreg> and <ioreg + 1> for exclusive access.
103 */
104 if (!request_muxed_region(ioreg, 2, DRVNAME))
105 return -EBUSY;
106
107 outb(0x87, ioreg);
108 outb(0x87, ioreg);
109
110 return 0;
111}
112
113static inline void
114superio_exit(int ioreg)
115{
116 outb(0xaa, ioreg);
117 outb(0x02, ioreg);
118 outb(0x02, ioreg + 1);
119 release_region(ioreg, 2);
120}
121
122/*
123 * ISA constants
124 */
125
126#define IOREGION_ALIGNMENT (~7)
127#define IOREGION_OFFSET 4 /* Use EC port 1 */
128#define IOREGION_LENGTH 4
129
130#define EC_PAGE_REG 0
131#define EC_INDEX_REG 1
132#define EC_DATA_REG 2
133#define EC_EVENT_REG 3
134
135/* Common and NCT6683 specific data */
136
137#define NCT6683_NUM_REG_MON 32
138#define NCT6683_NUM_REG_FAN 16
139#define NCT6683_NUM_REG_PWM 8
140
141#define NCT6683_REG_MON(x) (0x100 + (x) * 2)
142#define NCT6683_REG_FAN_RPM(x) (0x140 + (x) * 2)
143#define NCT6683_REG_PWM(x) (0x160 + (x))
144#define NCT6683_REG_PWM_WRITE(x) (0xa28 + (x))
145
146#define NCT6683_REG_MON_STS(x) (0x174 + (x))
147#define NCT6683_REG_IDLE(x) (0x178 + (x))
148
149#define NCT6683_REG_FAN_STS(x) (0x17c + (x))
150#define NCT6683_REG_FAN_ERRSTS 0x17e
151#define NCT6683_REG_FAN_INITSTS 0x17f
152
153#define NCT6683_HWM_CFG 0x180
154
155#define NCT6683_REG_MON_CFG(x) (0x1a0 + (x))
156#define NCT6683_REG_FANIN_CFG(x) (0x1c0 + (x))
157#define NCT6683_REG_FANOUT_CFG(x) (0x1d0 + (x))
158
159#define NCT6683_REG_INTEL_TEMP_MAX(x) (0x901 + (x) * 16)
160#define NCT6683_REG_INTEL_TEMP_CRIT(x) (0x90d + (x) * 16)
161
162#define NCT6683_REG_TEMP_HYST(x) (0x330 + (x)) /* 8 bit */
163#define NCT6683_REG_TEMP_MAX(x) (0x350 + (x)) /* 8 bit */
164#define NCT6683_REG_MON_HIGH(x) (0x370 + (x) * 2) /* 8 bit */
165#define NCT6683_REG_MON_LOW(x) (0x371 + (x) * 2) /* 8 bit */
166
167#define NCT6683_REG_FAN_MIN(x) (0x3b8 + (x) * 2) /* 16 bit */
168
169#define NCT6683_REG_FAN_CFG_CTRL 0xa01
170#define NCT6683_FAN_CFG_REQ 0x80
171#define NCT6683_FAN_CFG_DONE 0x40
172
173#define NCT6683_REG_CUSTOMER_ID 0x602
174#define NCT6683_CUSTOMER_ID_INTEL 0x805
175#define NCT6683_CUSTOMER_ID_MITAC 0xa0e
176
177#define NCT6683_REG_BUILD_YEAR 0x604
178#define NCT6683_REG_BUILD_MONTH 0x605
179#define NCT6683_REG_BUILD_DAY 0x606
180#define NCT6683_REG_SERIAL 0x607
181#define NCT6683_REG_VERSION_HI 0x608
182#define NCT6683_REG_VERSION_LO 0x609
183
184#define NCT6683_REG_CR_CASEOPEN 0xe8
185#define NCT6683_CR_CASEOPEN_MASK (1 << 7)
186
187#define NCT6683_REG_CR_BEEP 0xe0
188#define NCT6683_CR_BEEP_MASK (1 << 6)
189
190static const char *const nct6683_mon_label[] = {
191 NULL, /* disabled */
192 "Local",
193 "Diode 0 (curr)",
194 "Diode 1 (curr)",
195 "Diode 2 (curr)",
196 "Diode 0 (volt)",
197 "Diode 1 (volt)",
198 "Diode 2 (volt)",
199 "Thermistor 14",
200 "Thermistor 15",
201 "Thermistor 16",
202 "Thermistor 0",
203 "Thermistor 1",
204 "Thermistor 2",
205 "Thermistor 3",
206 "Thermistor 4",
207 "Thermistor 5", /* 0x10 */
208 "Thermistor 6",
209 "Thermistor 7",
210 "Thermistor 8",
211 "Thermistor 9",
212 "Thermistor 10",
213 "Thermistor 11",
214 "Thermistor 12",
215 "Thermistor 13",
216 NULL, NULL, NULL, NULL, NULL, NULL, NULL,
217 "PECI 0.0", /* 0x20 */
218 "PECI 1.0",
219 "PECI 2.0",
220 "PECI 3.0",
221 "PECI 0.1",
222 "PECI 1.1",
223 "PECI 2.1",
224 "PECI 3.1",
225 "PECI DIMM 0",
226 "PECI DIMM 1",
227 "PECI DIMM 2",
228 "PECI DIMM 3",
229 NULL, NULL, NULL, NULL,
230 "PCH CPU", /* 0x30 */
231 "PCH CHIP",
232 "PCH CHIP CPU MAX",
233 "PCH MCH",
234 "PCH DIMM 0",
235 "PCH DIMM 1",
236 "PCH DIMM 2",
237 "PCH DIMM 3",
238 "SMBus 0",
239 "SMBus 1",
240 "SMBus 2",
241 "SMBus 3",
242 "SMBus 4",
243 "SMBus 5",
244 "DIMM 0",
245 "DIMM 1",
246 "DIMM 2", /* 0x40 */
247 "DIMM 3",
248 "AMD TSI Addr 90h",
249 "AMD TSI Addr 92h",
250 "AMD TSI Addr 94h",
251 "AMD TSI Addr 96h",
252 "AMD TSI Addr 98h",
253 "AMD TSI Addr 9ah",
254 "AMD TSI Addr 9ch",
255 "AMD TSI Addr 9dh",
256 NULL, NULL, NULL, NULL, NULL, NULL,
257 "Virtual 0", /* 0x50 */
258 "Virtual 1",
259 "Virtual 2",
260 "Virtual 3",
261 "Virtual 4",
262 "Virtual 5",
263 "Virtual 6",
264 "Virtual 7",
265 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
266 "VCC", /* 0x60 voltage sensors */
267 "VSB",
268 "AVSB",
269 "VTT",
270 "VBAT",
271 "VREF",
272 "VIN0",
273 "VIN1",
274 "VIN2",
275 "VIN3",
276 "VIN4",
277 "VIN5",
278 "VIN6",
279 "VIN7",
280 "VIN8",
281 "VIN9",
282 "VIN10",
283 "VIN11",
284 "VIN12",
285 "VIN13",
286 "VIN14",
287 "VIN15",
288 "VIN16",
289};
290
291#define NUM_MON_LABELS ARRAY_SIZE(nct6683_mon_label)
292#define MON_VOLTAGE_START 0x60
293
294/* ------------------------------------------------------- */
295
296struct nct6683_data {
297 int addr; /* IO base of EC space */
298 int sioreg; /* SIO register */
299 enum kinds kind;
300 u16 customer_id;
301
302 struct device *hwmon_dev;
303 const struct attribute_group *groups[6];
304
305 int temp_num; /* number of temperature attributes */
306 u8 temp_index[NCT6683_NUM_REG_MON];
307 u8 temp_src[NCT6683_NUM_REG_MON];
308
309 u8 in_num; /* number of voltage attributes */
310 u8 in_index[NCT6683_NUM_REG_MON];
311 u8 in_src[NCT6683_NUM_REG_MON];
312
313 struct mutex update_lock; /* used to protect sensor updates */
314 bool valid; /* true if following fields are valid */
315 unsigned long last_updated; /* In jiffies */
316
317 /* Voltage attribute values */
318 u8 in[3][NCT6683_NUM_REG_MON]; /* [0]=in, [1]=in_max, [2]=in_min */
319
320 /* Temperature attribute values */
321 s16 temp_in[NCT6683_NUM_REG_MON];
322 s8 temp[4][NCT6683_NUM_REG_MON];/* [0]=min, [1]=max, [2]=hyst,
323 * [3]=crit
324 */
325
326 /* Fan attribute values */
327 unsigned int rpm[NCT6683_NUM_REG_FAN];
328 u16 fan_min[NCT6683_NUM_REG_FAN];
329 u8 fanin_cfg[NCT6683_NUM_REG_FAN];
330 u8 fanout_cfg[NCT6683_NUM_REG_FAN];
331 u16 have_fan; /* some fan inputs can be disabled */
332
333 u8 have_pwm;
334 u8 pwm[NCT6683_NUM_REG_PWM];
335
336#ifdef CONFIG_PM
337 /* Remember extra register values over suspend/resume */
338 u8 hwm_cfg;
339#endif
340};
341
342struct nct6683_sio_data {
343 int sioreg;
344 enum kinds kind;
345};
346
347struct sensor_device_template {
348 struct device_attribute dev_attr;
349 union {
350 struct {
351 u8 nr;
352 u8 index;
353 } s;
354 int index;
355 } u;
356 bool s2; /* true if both index and nr are used */
357};
358
359struct sensor_device_attr_u {
360 union {
361 struct sensor_device_attribute a1;
362 struct sensor_device_attribute_2 a2;
363 } u;
364 char name[32];
365};
366
367#define __TEMPLATE_ATTR(_template, _mode, _show, _store) { \
368 .attr = {.name = _template, .mode = _mode }, \
369 .show = _show, \
370 .store = _store, \
371}
372
373#define SENSOR_DEVICE_TEMPLATE(_template, _mode, _show, _store, _index) \
374 { .dev_attr = __TEMPLATE_ATTR(_template, _mode, _show, _store), \
375 .u.index = _index, \
376 .s2 = false }
377
378#define SENSOR_DEVICE_TEMPLATE_2(_template, _mode, _show, _store, \
379 _nr, _index) \
380 { .dev_attr = __TEMPLATE_ATTR(_template, _mode, _show, _store), \
381 .u.s.index = _index, \
382 .u.s.nr = _nr, \
383 .s2 = true }
384
385#define SENSOR_TEMPLATE(_name, _template, _mode, _show, _store, _index) \
386static struct sensor_device_template sensor_dev_template_##_name \
387 = SENSOR_DEVICE_TEMPLATE(_template, _mode, _show, _store, \
388 _index)
389
390#define SENSOR_TEMPLATE_2(_name, _template, _mode, _show, _store, \
391 _nr, _index) \
392static struct sensor_device_template sensor_dev_template_##_name \
393 = SENSOR_DEVICE_TEMPLATE_2(_template, _mode, _show, _store, \
394 _nr, _index)
395
396struct sensor_template_group {
397 struct sensor_device_template **templates;
398 umode_t (*is_visible)(struct kobject *, struct attribute *, int);
399 int base;
400};
401
402static struct attribute_group *
403nct6683_create_attr_group(struct device *dev,
404 const struct sensor_template_group *tg,
405 int repeat)
406{
407 struct sensor_device_attribute_2 *a2;
408 struct sensor_device_attribute *a;
409 struct sensor_device_template **t;
410 struct sensor_device_attr_u *su;
411 struct attribute_group *group;
412 struct attribute **attrs;
413 int i, j, count;
414
415 if (repeat <= 0)
416 return ERR_PTR(-EINVAL);
417
418 t = tg->templates;
419 for (count = 0; *t; t++, count++)
420 ;
421
422 if (count == 0)
423 return ERR_PTR(-EINVAL);
424
425 group = devm_kzalloc(dev, sizeof(*group), GFP_KERNEL);
426 if (group == NULL)
427 return ERR_PTR(-ENOMEM);
428
429 attrs = devm_kcalloc(dev, repeat * count + 1, sizeof(*attrs),
430 GFP_KERNEL);
431 if (attrs == NULL)
432 return ERR_PTR(-ENOMEM);
433
434 su = devm_kzalloc(dev, array3_size(repeat, count, sizeof(*su)),
435 GFP_KERNEL);
436 if (su == NULL)
437 return ERR_PTR(-ENOMEM);
438
439 group->attrs = attrs;
440 group->is_visible = tg->is_visible;
441
442 for (i = 0; i < repeat; i++) {
443 t = tg->templates;
444 for (j = 0; *t != NULL; j++) {
445 snprintf(su->name, sizeof(su->name),
446 (*t)->dev_attr.attr.name, tg->base + i);
447 if ((*t)->s2) {
448 a2 = &su->u.a2;
449 sysfs_attr_init(&a2->dev_attr.attr);
450 a2->dev_attr.attr.name = su->name;
451 a2->nr = (*t)->u.s.nr + i;
452 a2->index = (*t)->u.s.index;
453 a2->dev_attr.attr.mode =
454 (*t)->dev_attr.attr.mode;
455 a2->dev_attr.show = (*t)->dev_attr.show;
456 a2->dev_attr.store = (*t)->dev_attr.store;
457 *attrs = &a2->dev_attr.attr;
458 } else {
459 a = &su->u.a1;
460 sysfs_attr_init(&a->dev_attr.attr);
461 a->dev_attr.attr.name = su->name;
462 a->index = (*t)->u.index + i;
463 a->dev_attr.attr.mode =
464 (*t)->dev_attr.attr.mode;
465 a->dev_attr.show = (*t)->dev_attr.show;
466 a->dev_attr.store = (*t)->dev_attr.store;
467 *attrs = &a->dev_attr.attr;
468 }
469 attrs++;
470 su++;
471 t++;
472 }
473 }
474
475 return group;
476}
477
478/* LSB is 16 mV, except for the following sources, where it is 32 mV */
479#define MON_SRC_VCC 0x60
480#define MON_SRC_VSB 0x61
481#define MON_SRC_AVSB 0x62
482#define MON_SRC_VBAT 0x64
483
484static inline long in_from_reg(u16 reg, u8 src)
485{
486 int scale = 16;
487
488 if (src == MON_SRC_VCC || src == MON_SRC_VSB || src == MON_SRC_AVSB ||
489 src == MON_SRC_VBAT)
490 scale <<= 1;
491 return reg * scale;
492}
493
494static inline u16 in_to_reg(u32 val, u8 src)
495{
496 int scale = 16;
497
498 if (src == MON_SRC_VCC || src == MON_SRC_VSB || src == MON_SRC_AVSB ||
499 src == MON_SRC_VBAT)
500 scale <<= 1;
501
502 return clamp_val(DIV_ROUND_CLOSEST(val, scale), 0, 127);
503}
504
505static u16 nct6683_read(struct nct6683_data *data, u16 reg)
506{
507 int res;
508
509 outb_p(0xff, data->addr + EC_PAGE_REG); /* unlock */
510 outb_p(reg >> 8, data->addr + EC_PAGE_REG);
511 outb_p(reg & 0xff, data->addr + EC_INDEX_REG);
512 res = inb_p(data->addr + EC_DATA_REG);
513 return res;
514}
515
516static u16 nct6683_read16(struct nct6683_data *data, u16 reg)
517{
518 return (nct6683_read(data, reg) << 8) | nct6683_read(data, reg + 1);
519}
520
521static void nct6683_write(struct nct6683_data *data, u16 reg, u16 value)
522{
523 outb_p(0xff, data->addr + EC_PAGE_REG); /* unlock */
524 outb_p(reg >> 8, data->addr + EC_PAGE_REG);
525 outb_p(reg & 0xff, data->addr + EC_INDEX_REG);
526 outb_p(value & 0xff, data->addr + EC_DATA_REG);
527}
528
529static int get_in_reg(struct nct6683_data *data, int nr, int index)
530{
531 int ch = data->in_index[index];
532 int reg = -EINVAL;
533
534 switch (nr) {
535 case 0:
536 reg = NCT6683_REG_MON(ch);
537 break;
538 case 1:
539 if (data->customer_id != NCT6683_CUSTOMER_ID_INTEL)
540 reg = NCT6683_REG_MON_LOW(ch);
541 break;
542 case 2:
543 if (data->customer_id != NCT6683_CUSTOMER_ID_INTEL)
544 reg = NCT6683_REG_MON_HIGH(ch);
545 break;
546 default:
547 break;
548 }
549 return reg;
550}
551
552static int get_temp_reg(struct nct6683_data *data, int nr, int index)
553{
554 int ch = data->temp_index[index];
555 int reg = -EINVAL;
556
557 switch (data->customer_id) {
558 case NCT6683_CUSTOMER_ID_INTEL:
559 switch (nr) {
560 default:
561 case 1: /* max */
562 reg = NCT6683_REG_INTEL_TEMP_MAX(ch);
563 break;
564 case 3: /* crit */
565 reg = NCT6683_REG_INTEL_TEMP_CRIT(ch);
566 break;
567 }
568 break;
569 case NCT6683_CUSTOMER_ID_MITAC:
570 default:
571 switch (nr) {
572 default:
573 case 0: /* min */
574 reg = NCT6683_REG_MON_LOW(ch);
575 break;
576 case 1: /* max */
577 reg = NCT6683_REG_TEMP_MAX(ch);
578 break;
579 case 2: /* hyst */
580 reg = NCT6683_REG_TEMP_HYST(ch);
581 break;
582 case 3: /* crit */
583 reg = NCT6683_REG_MON_HIGH(ch);
584 break;
585 }
586 break;
587 }
588 return reg;
589}
590
591static void nct6683_update_pwm(struct device *dev)
592{
593 struct nct6683_data *data = dev_get_drvdata(dev);
594 int i;
595
596 for (i = 0; i < NCT6683_NUM_REG_PWM; i++) {
597 if (!(data->have_pwm & (1 << i)))
598 continue;
599 data->pwm[i] = nct6683_read(data, NCT6683_REG_PWM(i));
600 }
601}
602
603static struct nct6683_data *nct6683_update_device(struct device *dev)
604{
605 struct nct6683_data *data = dev_get_drvdata(dev);
606 int i, j;
607
608 mutex_lock(&data->update_lock);
609
610 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
611 /* Measured voltages and limits */
612 for (i = 0; i < data->in_num; i++) {
613 for (j = 0; j < 3; j++) {
614 int reg = get_in_reg(data, j, i);
615
616 if (reg >= 0)
617 data->in[j][i] =
618 nct6683_read(data, reg);
619 }
620 }
621
622 /* Measured temperatures and limits */
623 for (i = 0; i < data->temp_num; i++) {
624 u8 ch = data->temp_index[i];
625
626 data->temp_in[i] = nct6683_read16(data,
627 NCT6683_REG_MON(ch));
628 for (j = 0; j < 4; j++) {
629 int reg = get_temp_reg(data, j, i);
630
631 if (reg >= 0)
632 data->temp[j][i] =
633 nct6683_read(data, reg);
634 }
635 }
636
637 /* Measured fan speeds and limits */
638 for (i = 0; i < ARRAY_SIZE(data->rpm); i++) {
639 if (!(data->have_fan & (1 << i)))
640 continue;
641
642 data->rpm[i] = nct6683_read16(data,
643 NCT6683_REG_FAN_RPM(i));
644 data->fan_min[i] = nct6683_read16(data,
645 NCT6683_REG_FAN_MIN(i));
646 }
647
648 nct6683_update_pwm(dev);
649
650 data->last_updated = jiffies;
651 data->valid = true;
652 }
653
654 mutex_unlock(&data->update_lock);
655 return data;
656}
657
658/*
659 * Sysfs callback functions
660 */
661static ssize_t
662show_in_label(struct device *dev, struct device_attribute *attr, char *buf)
663{
664 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
665 struct nct6683_data *data = nct6683_update_device(dev);
666 int nr = sattr->index;
667
668 return sprintf(buf, "%s\n", nct6683_mon_label[data->in_src[nr]]);
669}
670
671static ssize_t
672show_in_reg(struct device *dev, struct device_attribute *attr, char *buf)
673{
674 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
675 struct nct6683_data *data = nct6683_update_device(dev);
676 int index = sattr->index;
677 int nr = sattr->nr;
678
679 return sprintf(buf, "%ld\n",
680 in_from_reg(data->in[index][nr], data->in_index[index]));
681}
682
683static umode_t nct6683_in_is_visible(struct kobject *kobj,
684 struct attribute *attr, int index)
685{
686 struct device *dev = container_of(kobj, struct device, kobj);
687 struct nct6683_data *data = dev_get_drvdata(dev);
688 int nr = index % 4; /* attribute */
689
690 /*
691 * Voltage limits exist for Intel boards,
692 * but register location and encoding is unknown
693 */
694 if ((nr == 2 || nr == 3) &&
695 data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
696 return 0;
697
698 return attr->mode;
699}
700
701SENSOR_TEMPLATE(in_label, "in%d_label", S_IRUGO, show_in_label, NULL, 0);
702SENSOR_TEMPLATE_2(in_input, "in%d_input", S_IRUGO, show_in_reg, NULL, 0, 0);
703SENSOR_TEMPLATE_2(in_min, "in%d_min", S_IRUGO, show_in_reg, NULL, 0, 1);
704SENSOR_TEMPLATE_2(in_max, "in%d_max", S_IRUGO, show_in_reg, NULL, 0, 2);
705
706static struct sensor_device_template *nct6683_attributes_in_template[] = {
707 &sensor_dev_template_in_label,
708 &sensor_dev_template_in_input,
709 &sensor_dev_template_in_min,
710 &sensor_dev_template_in_max,
711 NULL
712};
713
714static const struct sensor_template_group nct6683_in_template_group = {
715 .templates = nct6683_attributes_in_template,
716 .is_visible = nct6683_in_is_visible,
717};
718
719static ssize_t
720show_fan(struct device *dev, struct device_attribute *attr, char *buf)
721{
722 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
723 struct nct6683_data *data = nct6683_update_device(dev);
724
725 return sprintf(buf, "%d\n", data->rpm[sattr->index]);
726}
727
728static ssize_t
729show_fan_min(struct device *dev, struct device_attribute *attr, char *buf)
730{
731 struct nct6683_data *data = nct6683_update_device(dev);
732 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
733 int nr = sattr->index;
734
735 return sprintf(buf, "%d\n", data->fan_min[nr]);
736}
737
738static ssize_t
739show_fan_pulses(struct device *dev, struct device_attribute *attr, char *buf)
740{
741 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
742 struct nct6683_data *data = nct6683_update_device(dev);
743
744 return sprintf(buf, "%d\n",
745 ((data->fanin_cfg[sattr->index] >> 5) & 0x03) + 1);
746}
747
748static umode_t nct6683_fan_is_visible(struct kobject *kobj,
749 struct attribute *attr, int index)
750{
751 struct device *dev = container_of(kobj, struct device, kobj);
752 struct nct6683_data *data = dev_get_drvdata(dev);
753 int fan = index / 3; /* fan index */
754 int nr = index % 3; /* attribute index */
755
756 if (!(data->have_fan & (1 << fan)))
757 return 0;
758
759 /*
760 * Intel may have minimum fan speed limits,
761 * but register location and encoding are unknown.
762 */
763 if (nr == 2 && data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
764 return 0;
765
766 return attr->mode;
767}
768
769SENSOR_TEMPLATE(fan_input, "fan%d_input", S_IRUGO, show_fan, NULL, 0);
770SENSOR_TEMPLATE(fan_pulses, "fan%d_pulses", S_IRUGO, show_fan_pulses, NULL, 0);
771SENSOR_TEMPLATE(fan_min, "fan%d_min", S_IRUGO, show_fan_min, NULL, 0);
772
773/*
774 * nct6683_fan_is_visible uses the index into the following array
775 * to determine if attributes should be created or not.
776 * Any change in order or content must be matched.
777 */
778static struct sensor_device_template *nct6683_attributes_fan_template[] = {
779 &sensor_dev_template_fan_input,
780 &sensor_dev_template_fan_pulses,
781 &sensor_dev_template_fan_min,
782 NULL
783};
784
785static const struct sensor_template_group nct6683_fan_template_group = {
786 .templates = nct6683_attributes_fan_template,
787 .is_visible = nct6683_fan_is_visible,
788 .base = 1,
789};
790
791static ssize_t
792show_temp_label(struct device *dev, struct device_attribute *attr, char *buf)
793{
794 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
795 struct nct6683_data *data = nct6683_update_device(dev);
796 int nr = sattr->index;
797
798 return sprintf(buf, "%s\n", nct6683_mon_label[data->temp_src[nr]]);
799}
800
801static ssize_t
802show_temp8(struct device *dev, struct device_attribute *attr, char *buf)
803{
804 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
805 struct nct6683_data *data = nct6683_update_device(dev);
806 int index = sattr->index;
807 int nr = sattr->nr;
808
809 return sprintf(buf, "%d\n", data->temp[index][nr] * 1000);
810}
811
812static ssize_t
813show_temp_hyst(struct device *dev, struct device_attribute *attr, char *buf)
814{
815 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
816 struct nct6683_data *data = nct6683_update_device(dev);
817 int nr = sattr->index;
818 int temp = data->temp[1][nr] - data->temp[2][nr];
819
820 return sprintf(buf, "%d\n", temp * 1000);
821}
822
823static ssize_t
824show_temp16(struct device *dev, struct device_attribute *attr, char *buf)
825{
826 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
827 struct nct6683_data *data = nct6683_update_device(dev);
828 int index = sattr->index;
829
830 return sprintf(buf, "%d\n", (data->temp_in[index] / 128) * 500);
831}
832
833/*
834 * Temperature sensor type is determined by temperature source
835 * and can not be modified.
836 * 0x02..0x07: Thermal diode
837 * 0x08..0x18: Thermistor
838 * 0x20..0x2b: Intel PECI
839 * 0x42..0x49: AMD TSI
840 * Others are unspecified (not visible)
841 */
842
843static int get_temp_type(u8 src)
844{
845 if (src >= 0x02 && src <= 0x07)
846 return 3; /* thermal diode */
847 else if (src >= 0x08 && src <= 0x18)
848 return 4; /* thermistor */
849 else if (src >= 0x20 && src <= 0x2b)
850 return 6; /* PECI */
851 else if (src >= 0x42 && src <= 0x49)
852 return 5;
853
854 return 0;
855}
856
857static ssize_t
858show_temp_type(struct device *dev, struct device_attribute *attr, char *buf)
859{
860 struct nct6683_data *data = nct6683_update_device(dev);
861 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
862 int nr = sattr->index;
863 return sprintf(buf, "%d\n", get_temp_type(data->temp_src[nr]));
864}
865
866static umode_t nct6683_temp_is_visible(struct kobject *kobj,
867 struct attribute *attr, int index)
868{
869 struct device *dev = container_of(kobj, struct device, kobj);
870 struct nct6683_data *data = dev_get_drvdata(dev);
871 int temp = index / 7; /* temp index */
872 int nr = index % 7; /* attribute index */
873
874 /*
875 * Intel does not have low temperature limits or temperature hysteresis
876 * registers, or at least register location and encoding is unknown.
877 */
878 if ((nr == 2 || nr == 4) &&
879 data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
880 return 0;
881
882 if (nr == 6 && get_temp_type(data->temp_src[temp]) == 0)
883 return 0; /* type */
884
885 return attr->mode;
886}
887
888SENSOR_TEMPLATE(temp_input, "temp%d_input", S_IRUGO, show_temp16, NULL, 0);
889SENSOR_TEMPLATE(temp_label, "temp%d_label", S_IRUGO, show_temp_label, NULL, 0);
890SENSOR_TEMPLATE_2(temp_min, "temp%d_min", S_IRUGO, show_temp8, NULL, 0, 0);
891SENSOR_TEMPLATE_2(temp_max, "temp%d_max", S_IRUGO, show_temp8, NULL, 0, 1);
892SENSOR_TEMPLATE(temp_max_hyst, "temp%d_max_hyst", S_IRUGO, show_temp_hyst, NULL,
893 0);
894SENSOR_TEMPLATE_2(temp_crit, "temp%d_crit", S_IRUGO, show_temp8, NULL, 0, 3);
895SENSOR_TEMPLATE(temp_type, "temp%d_type", S_IRUGO, show_temp_type, NULL, 0);
896
897/*
898 * nct6683_temp_is_visible uses the index into the following array
899 * to determine if attributes should be created or not.
900 * Any change in order or content must be matched.
901 */
902static struct sensor_device_template *nct6683_attributes_temp_template[] = {
903 &sensor_dev_template_temp_input,
904 &sensor_dev_template_temp_label,
905 &sensor_dev_template_temp_min, /* 2 */
906 &sensor_dev_template_temp_max, /* 3 */
907 &sensor_dev_template_temp_max_hyst, /* 4 */
908 &sensor_dev_template_temp_crit, /* 5 */
909 &sensor_dev_template_temp_type, /* 6 */
910 NULL
911};
912
913static const struct sensor_template_group nct6683_temp_template_group = {
914 .templates = nct6683_attributes_temp_template,
915 .is_visible = nct6683_temp_is_visible,
916 .base = 1,
917};
918
919static ssize_t
920show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
921{
922 struct nct6683_data *data = nct6683_update_device(dev);
923 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
924 int index = sattr->index;
925
926 return sprintf(buf, "%d\n", data->pwm[index]);
927}
928
929static ssize_t
930store_pwm(struct device *dev, struct device_attribute *attr, const char *buf,
931 size_t count)
932{
933 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
934 struct nct6683_data *data = dev_get_drvdata(dev);
935 int index = sattr->index;
936 unsigned long val;
937
938 if (kstrtoul(buf, 10, &val) || val > 255)
939 return -EINVAL;
940
941 mutex_lock(&data->update_lock);
942 nct6683_write(data, NCT6683_REG_FAN_CFG_CTRL, NCT6683_FAN_CFG_REQ);
943 usleep_range(1000, 2000);
944 nct6683_write(data, NCT6683_REG_PWM_WRITE(index), val);
945 nct6683_write(data, NCT6683_REG_FAN_CFG_CTRL, NCT6683_FAN_CFG_DONE);
946 mutex_unlock(&data->update_lock);
947
948 return count;
949}
950
951SENSOR_TEMPLATE(pwm, "pwm%d", S_IRUGO, show_pwm, store_pwm, 0);
952
953static umode_t nct6683_pwm_is_visible(struct kobject *kobj,
954 struct attribute *attr, int index)
955{
956 struct device *dev = container_of(kobj, struct device, kobj);
957 struct nct6683_data *data = dev_get_drvdata(dev);
958 int pwm = index; /* pwm index */
959
960 if (!(data->have_pwm & (1 << pwm)))
961 return 0;
962
963 /* Only update pwm values for Mitac boards */
964 if (data->customer_id == NCT6683_CUSTOMER_ID_MITAC)
965 return attr->mode | S_IWUSR;
966
967 return attr->mode;
968}
969
970static struct sensor_device_template *nct6683_attributes_pwm_template[] = {
971 &sensor_dev_template_pwm,
972 NULL
973};
974
975static const struct sensor_template_group nct6683_pwm_template_group = {
976 .templates = nct6683_attributes_pwm_template,
977 .is_visible = nct6683_pwm_is_visible,
978 .base = 1,
979};
980
981static ssize_t
982beep_enable_show(struct device *dev, struct device_attribute *attr, char *buf)
983{
984 struct nct6683_data *data = dev_get_drvdata(dev);
985 int ret;
986 u8 reg;
987
988 mutex_lock(&data->update_lock);
989
990 ret = superio_enter(data->sioreg);
991 if (ret)
992 goto error;
993 superio_select(data->sioreg, NCT6683_LD_HWM);
994 reg = superio_inb(data->sioreg, NCT6683_REG_CR_BEEP);
995 superio_exit(data->sioreg);
996
997 mutex_unlock(&data->update_lock);
998
999 return sprintf(buf, "%u\n", !!(reg & NCT6683_CR_BEEP_MASK));
1000
1001error:
1002 mutex_unlock(&data->update_lock);
1003 return ret;
1004}
1005
1006static ssize_t
1007beep_enable_store(struct device *dev, struct device_attribute *attr,
1008 const char *buf, size_t count)
1009{
1010 struct nct6683_data *data = dev_get_drvdata(dev);
1011 unsigned long val;
1012 u8 reg;
1013 int ret;
1014
1015 if (kstrtoul(buf, 10, &val) || (val != 0 && val != 1))
1016 return -EINVAL;
1017
1018 mutex_lock(&data->update_lock);
1019
1020 ret = superio_enter(data->sioreg);
1021 if (ret) {
1022 count = ret;
1023 goto error;
1024 }
1025
1026 superio_select(data->sioreg, NCT6683_LD_HWM);
1027 reg = superio_inb(data->sioreg, NCT6683_REG_CR_BEEP);
1028 if (val)
1029 reg |= NCT6683_CR_BEEP_MASK;
1030 else
1031 reg &= ~NCT6683_CR_BEEP_MASK;
1032 superio_outb(data->sioreg, NCT6683_REG_CR_BEEP, reg);
1033 superio_exit(data->sioreg);
1034error:
1035 mutex_unlock(&data->update_lock);
1036 return count;
1037}
1038
1039/* Case open detection */
1040
1041static ssize_t
1042intrusion0_alarm_show(struct device *dev, struct device_attribute *attr,
1043 char *buf)
1044{
1045 struct nct6683_data *data = dev_get_drvdata(dev);
1046 int ret;
1047 u8 reg;
1048
1049 mutex_lock(&data->update_lock);
1050
1051 ret = superio_enter(data->sioreg);
1052 if (ret)
1053 goto error;
1054 superio_select(data->sioreg, NCT6683_LD_ACPI);
1055 reg = superio_inb(data->sioreg, NCT6683_REG_CR_CASEOPEN);
1056 superio_exit(data->sioreg);
1057
1058 mutex_unlock(&data->update_lock);
1059
1060 return sprintf(buf, "%u\n", !(reg & NCT6683_CR_CASEOPEN_MASK));
1061
1062error:
1063 mutex_unlock(&data->update_lock);
1064 return ret;
1065}
1066
1067static ssize_t
1068intrusion0_alarm_store(struct device *dev, struct device_attribute *attr,
1069 const char *buf, size_t count)
1070{
1071 struct nct6683_data *data = dev_get_drvdata(dev);
1072 unsigned long val;
1073 u8 reg;
1074 int ret;
1075
1076 if (kstrtoul(buf, 10, &val) || val != 0)
1077 return -EINVAL;
1078
1079 mutex_lock(&data->update_lock);
1080
1081 /*
1082 * Use CR registers to clear caseopen status.
1083 * Caseopen is activ low, clear by writing 1 into the register.
1084 */
1085
1086 ret = superio_enter(data->sioreg);
1087 if (ret) {
1088 count = ret;
1089 goto error;
1090 }
1091
1092 superio_select(data->sioreg, NCT6683_LD_ACPI);
1093 reg = superio_inb(data->sioreg, NCT6683_REG_CR_CASEOPEN);
1094 reg |= NCT6683_CR_CASEOPEN_MASK;
1095 superio_outb(data->sioreg, NCT6683_REG_CR_CASEOPEN, reg);
1096 reg &= ~NCT6683_CR_CASEOPEN_MASK;
1097 superio_outb(data->sioreg, NCT6683_REG_CR_CASEOPEN, reg);
1098 superio_exit(data->sioreg);
1099
1100 data->valid = false; /* Force cache refresh */
1101error:
1102 mutex_unlock(&data->update_lock);
1103 return count;
1104}
1105
1106static DEVICE_ATTR_RW(intrusion0_alarm);
1107static DEVICE_ATTR_RW(beep_enable);
1108
1109static struct attribute *nct6683_attributes_other[] = {
1110 &dev_attr_intrusion0_alarm.attr,
1111 &dev_attr_beep_enable.attr,
1112 NULL
1113};
1114
1115static const struct attribute_group nct6683_group_other = {
1116 .attrs = nct6683_attributes_other,
1117};
1118
1119/* Get the monitoring functions started */
1120static inline void nct6683_init_device(struct nct6683_data *data)
1121{
1122 u8 tmp;
1123
1124 /* Start hardware monitoring if needed */
1125 tmp = nct6683_read(data, NCT6683_HWM_CFG);
1126 if (!(tmp & 0x80))
1127 nct6683_write(data, NCT6683_HWM_CFG, tmp | 0x80);
1128}
1129
1130/*
1131 * There are a total of 24 fan inputs. Each can be configured as input
1132 * or as output. A maximum of 16 inputs and 8 outputs is configurable.
1133 */
1134static void
1135nct6683_setup_fans(struct nct6683_data *data)
1136{
1137 int i;
1138 u8 reg;
1139
1140 for (i = 0; i < NCT6683_NUM_REG_FAN; i++) {
1141 reg = nct6683_read(data, NCT6683_REG_FANIN_CFG(i));
1142 if (reg & 0x80)
1143 data->have_fan |= 1 << i;
1144 data->fanin_cfg[i] = reg;
1145 }
1146 for (i = 0; i < NCT6683_NUM_REG_PWM; i++) {
1147 reg = nct6683_read(data, NCT6683_REG_FANOUT_CFG(i));
1148 if (reg & 0x80)
1149 data->have_pwm |= 1 << i;
1150 data->fanout_cfg[i] = reg;
1151 }
1152}
1153
1154/*
1155 * Translation from monitoring register to temperature and voltage attributes
1156 * ==========================================================================
1157 *
1158 * There are a total of 32 monitoring registers. Each can be assigned to either
1159 * a temperature or voltage monitoring source.
1160 * NCT6683_REG_MON_CFG(x) defines assignment for each monitoring source.
1161 *
1162 * Temperature and voltage attribute mapping is determined by walking through
1163 * the NCT6683_REG_MON_CFG registers. If the assigned source is
1164 * a temperature, temp_index[n] is set to the monitor register index, and
1165 * temp_src[n] is set to the temperature source. If the assigned source is
1166 * a voltage, the respective values are stored in in_index[] and in_src[],
1167 * respectively.
1168 */
1169
1170static void nct6683_setup_sensors(struct nct6683_data *data)
1171{
1172 u8 reg;
1173 int i;
1174
1175 data->temp_num = 0;
1176 data->in_num = 0;
1177 for (i = 0; i < NCT6683_NUM_REG_MON; i++) {
1178 reg = nct6683_read(data, NCT6683_REG_MON_CFG(i)) & 0x7f;
1179 /* Ignore invalid assignments */
1180 if (reg >= NUM_MON_LABELS)
1181 continue;
1182 /* Skip if disabled or reserved */
1183 if (nct6683_mon_label[reg] == NULL)
1184 continue;
1185 if (reg < MON_VOLTAGE_START) {
1186 data->temp_index[data->temp_num] = i;
1187 data->temp_src[data->temp_num] = reg;
1188 data->temp_num++;
1189 } else {
1190 data->in_index[data->in_num] = i;
1191 data->in_src[data->in_num] = reg;
1192 data->in_num++;
1193 }
1194 }
1195}
1196
1197static int nct6683_probe(struct platform_device *pdev)
1198{
1199 struct device *dev = &pdev->dev;
1200 struct nct6683_sio_data *sio_data = dev->platform_data;
1201 struct attribute_group *group;
1202 struct nct6683_data *data;
1203 struct device *hwmon_dev;
1204 struct resource *res;
1205 int groups = 0;
1206 char build[16];
1207
1208 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1209 if (!devm_request_region(dev, res->start, IOREGION_LENGTH, DRVNAME))
1210 return -EBUSY;
1211
1212 data = devm_kzalloc(dev, sizeof(struct nct6683_data), GFP_KERNEL);
1213 if (!data)
1214 return -ENOMEM;
1215
1216 data->kind = sio_data->kind;
1217 data->sioreg = sio_data->sioreg;
1218 data->addr = res->start;
1219 mutex_init(&data->update_lock);
1220 platform_set_drvdata(pdev, data);
1221
1222 data->customer_id = nct6683_read16(data, NCT6683_REG_CUSTOMER_ID);
1223
1224 /* By default only instantiate driver if the customer ID is known */
1225 switch (data->customer_id) {
1226 case NCT6683_CUSTOMER_ID_INTEL:
1227 break;
1228 case NCT6683_CUSTOMER_ID_MITAC:
1229 break;
1230 default:
1231 if (!force)
1232 return -ENODEV;
1233 }
1234
1235 nct6683_init_device(data);
1236 nct6683_setup_fans(data);
1237 nct6683_setup_sensors(data);
1238
1239 /* Register sysfs hooks */
1240
1241 if (data->have_pwm) {
1242 group = nct6683_create_attr_group(dev,
1243 &nct6683_pwm_template_group,
1244 fls(data->have_pwm));
1245 if (IS_ERR(group))
1246 return PTR_ERR(group);
1247 data->groups[groups++] = group;
1248 }
1249
1250 if (data->in_num) {
1251 group = nct6683_create_attr_group(dev,
1252 &nct6683_in_template_group,
1253 data->in_num);
1254 if (IS_ERR(group))
1255 return PTR_ERR(group);
1256 data->groups[groups++] = group;
1257 }
1258
1259 if (data->have_fan) {
1260 group = nct6683_create_attr_group(dev,
1261 &nct6683_fan_template_group,
1262 fls(data->have_fan));
1263 if (IS_ERR(group))
1264 return PTR_ERR(group);
1265 data->groups[groups++] = group;
1266 }
1267
1268 if (data->temp_num) {
1269 group = nct6683_create_attr_group(dev,
1270 &nct6683_temp_template_group,
1271 data->temp_num);
1272 if (IS_ERR(group))
1273 return PTR_ERR(group);
1274 data->groups[groups++] = group;
1275 }
1276 data->groups[groups++] = &nct6683_group_other;
1277
1278 if (data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
1279 scnprintf(build, sizeof(build), "%02x/%02x/%02x",
1280 nct6683_read(data, NCT6683_REG_BUILD_MONTH),
1281 nct6683_read(data, NCT6683_REG_BUILD_DAY),
1282 nct6683_read(data, NCT6683_REG_BUILD_YEAR));
1283 else
1284 scnprintf(build, sizeof(build), "%02d/%02d/%02d",
1285 nct6683_read(data, NCT6683_REG_BUILD_MONTH),
1286 nct6683_read(data, NCT6683_REG_BUILD_DAY),
1287 nct6683_read(data, NCT6683_REG_BUILD_YEAR));
1288
1289 dev_info(dev, "%s EC firmware version %d.%d build %s\n",
1290 nct6683_chip_names[data->kind],
1291 nct6683_read(data, NCT6683_REG_VERSION_HI),
1292 nct6683_read(data, NCT6683_REG_VERSION_LO),
1293 build);
1294
1295 hwmon_dev = devm_hwmon_device_register_with_groups(dev,
1296 nct6683_device_names[data->kind], data, data->groups);
1297 return PTR_ERR_OR_ZERO(hwmon_dev);
1298}
1299
1300#ifdef CONFIG_PM
1301static int nct6683_suspend(struct device *dev)
1302{
1303 struct nct6683_data *data = nct6683_update_device(dev);
1304
1305 mutex_lock(&data->update_lock);
1306 data->hwm_cfg = nct6683_read(data, NCT6683_HWM_CFG);
1307 mutex_unlock(&data->update_lock);
1308
1309 return 0;
1310}
1311
1312static int nct6683_resume(struct device *dev)
1313{
1314 struct nct6683_data *data = dev_get_drvdata(dev);
1315
1316 mutex_lock(&data->update_lock);
1317
1318 nct6683_write(data, NCT6683_HWM_CFG, data->hwm_cfg);
1319
1320 /* Force re-reading all values */
1321 data->valid = false;
1322 mutex_unlock(&data->update_lock);
1323
1324 return 0;
1325}
1326
1327static const struct dev_pm_ops nct6683_dev_pm_ops = {
1328 .suspend = nct6683_suspend,
1329 .resume = nct6683_resume,
1330 .freeze = nct6683_suspend,
1331 .restore = nct6683_resume,
1332};
1333
1334#define NCT6683_DEV_PM_OPS (&nct6683_dev_pm_ops)
1335#else
1336#define NCT6683_DEV_PM_OPS NULL
1337#endif /* CONFIG_PM */
1338
1339static struct platform_driver nct6683_driver = {
1340 .driver = {
1341 .name = DRVNAME,
1342 .pm = NCT6683_DEV_PM_OPS,
1343 },
1344 .probe = nct6683_probe,
1345};
1346
1347static int __init nct6683_find(int sioaddr, struct nct6683_sio_data *sio_data)
1348{
1349 int addr;
1350 u16 val;
1351 int err;
1352
1353 err = superio_enter(sioaddr);
1354 if (err)
1355 return err;
1356
1357 val = (superio_inb(sioaddr, SIO_REG_DEVID) << 8)
1358 | superio_inb(sioaddr, SIO_REG_DEVID + 1);
1359
1360 switch (val & SIO_ID_MASK) {
1361 case SIO_NCT6683_ID:
1362 sio_data->kind = nct6683;
1363 break;
1364 default:
1365 if (val != 0xffff)
1366 pr_debug("unsupported chip ID: 0x%04x\n", val);
1367 goto fail;
1368 }
1369
1370 /* We have a known chip, find the HWM I/O address */
1371 superio_select(sioaddr, NCT6683_LD_HWM);
1372 val = (superio_inb(sioaddr, SIO_REG_ADDR) << 8)
1373 | superio_inb(sioaddr, SIO_REG_ADDR + 1);
1374 addr = val & IOREGION_ALIGNMENT;
1375 if (addr == 0) {
1376 pr_err("EC base I/O port unconfigured\n");
1377 goto fail;
1378 }
1379
1380 /* Activate logical device if needed */
1381 val = superio_inb(sioaddr, SIO_REG_ENABLE);
1382 if (!(val & 0x01)) {
1383 pr_warn("Forcibly enabling EC access. Data may be unusable.\n");
1384 superio_outb(sioaddr, SIO_REG_ENABLE, val | 0x01);
1385 }
1386
1387 superio_exit(sioaddr);
1388 pr_info("Found %s or compatible chip at %#x:%#x\n",
1389 nct6683_chip_names[sio_data->kind], sioaddr, addr);
1390 sio_data->sioreg = sioaddr;
1391
1392 return addr;
1393
1394fail:
1395 superio_exit(sioaddr);
1396 return -ENODEV;
1397}
1398
1399/*
1400 * when Super-I/O functions move to a separate file, the Super-I/O
1401 * bus will manage the lifetime of the device and this module will only keep
1402 * track of the nct6683 driver. But since we use platform_device_alloc(), we
1403 * must keep track of the device
1404 */
1405static struct platform_device *pdev[2];
1406
1407static int __init sensors_nct6683_init(void)
1408{
1409 struct nct6683_sio_data sio_data;
1410 int sioaddr[2] = { 0x2e, 0x4e };
1411 struct resource res;
1412 bool found = false;
1413 int address;
1414 int i, err;
1415
1416 err = platform_driver_register(&nct6683_driver);
1417 if (err)
1418 return err;
1419
1420 /*
1421 * initialize sio_data->kind and sio_data->sioreg.
1422 *
1423 * when Super-I/O functions move to a separate file, the Super-I/O
1424 * driver will probe 0x2e and 0x4e and auto-detect the presence of a
1425 * nct6683 hardware monitor, and call probe()
1426 */
1427 for (i = 0; i < ARRAY_SIZE(pdev); i++) {
1428 address = nct6683_find(sioaddr[i], &sio_data);
1429 if (address <= 0)
1430 continue;
1431
1432 found = true;
1433
1434 pdev[i] = platform_device_alloc(DRVNAME, address);
1435 if (!pdev[i]) {
1436 err = -ENOMEM;
1437 goto exit_device_unregister;
1438 }
1439
1440 err = platform_device_add_data(pdev[i], &sio_data,
1441 sizeof(struct nct6683_sio_data));
1442 if (err)
1443 goto exit_device_put;
1444
1445 memset(&res, 0, sizeof(res));
1446 res.name = DRVNAME;
1447 res.start = address + IOREGION_OFFSET;
1448 res.end = address + IOREGION_OFFSET + IOREGION_LENGTH - 1;
1449 res.flags = IORESOURCE_IO;
1450
1451 err = acpi_check_resource_conflict(&res);
1452 if (err) {
1453 platform_device_put(pdev[i]);
1454 pdev[i] = NULL;
1455 continue;
1456 }
1457
1458 err = platform_device_add_resources(pdev[i], &res, 1);
1459 if (err)
1460 goto exit_device_put;
1461
1462 /* platform_device_add calls probe() */
1463 err = platform_device_add(pdev[i]);
1464 if (err)
1465 goto exit_device_put;
1466 }
1467 if (!found) {
1468 err = -ENODEV;
1469 goto exit_unregister;
1470 }
1471
1472 return 0;
1473
1474exit_device_put:
1475 platform_device_put(pdev[i]);
1476exit_device_unregister:
1477 while (--i >= 0) {
1478 if (pdev[i])
1479 platform_device_unregister(pdev[i]);
1480 }
1481exit_unregister:
1482 platform_driver_unregister(&nct6683_driver);
1483 return err;
1484}
1485
1486static void __exit sensors_nct6683_exit(void)
1487{
1488 int i;
1489
1490 for (i = 0; i < ARRAY_SIZE(pdev); i++) {
1491 if (pdev[i])
1492 platform_device_unregister(pdev[i]);
1493 }
1494 platform_driver_unregister(&nct6683_driver);
1495}
1496
1497MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
1498MODULE_DESCRIPTION("NCT6683D driver");
1499MODULE_LICENSE("GPL");
1500
1501module_init(sensors_nct6683_init);
1502module_exit(sensors_nct6683_exit);
1503