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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / hwmon / nct6683.c
blobc0229152296f898fa4b391b3f010a3ae0e9e81d3
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * nct6683 - Driver for the hardware monitoring functionality of
4 * Nuvoton NCT6683D eSIO
5 *
6 * Copyright (C) 2013 Guenter Roeck <linux@roeck-us.net>
7 *
8 * Derived from nct6775 driver
9 * Copyright (C) 2012, 2013 Guenter Roeck <linux@roeck-us.net>
10 *
11 * Supports the following chips:
12 *
13 * Chip #vin #fan #pwm #temp chip ID
14 * nct6683d 21(1) 16 8 32(1) 0xc730
15 *
16 * Notes:
17 * (1) Total number of vin and temp inputs is 32.
18 */
19
20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21
22 #include <linux/acpi.h>
23 #include <linux/delay.h>
24 #include <linux/err.h>
25 #include <linux/init.h>
26 #include <linux/io.h>
27 #include <linux/jiffies.h>
28 #include <linux/hwmon.h>
29 #include <linux/hwmon-sysfs.h>
30 #include <linux/module.h>
31 #include <linux/mutex.h>
32 #include <linux/platform_device.h>
33 #include <linux/slab.h>
34
35 enum kinds { nct6683 };
36
37 static bool force;
38 module_param(force, bool, 0);
39 MODULE_PARM_DESC(force, "Set to one to enable support for unknown vendors");
40
41 static const char * const nct6683_device_names[] = {
42 "nct6683",
43 };
44
45 static const char * const nct6683_chip_names[] = {
46 "NCT6683D",
47 };
48
49 #define DRVNAME "nct6683"
50
51 /*
52 * Super-I/O constants and functions
53 */
54
55 #define NCT6683_LD_ACPI 0x0a
56 #define NCT6683_LD_HWM 0x0b
57 #define NCT6683_LD_VID 0x0d
58
59 #define SIO_REG_LDSEL 0x07 /* Logical device select */
60 #define SIO_REG_DEVID 0x20 /* Device ID (2 bytes) */
61 #define SIO_REG_ENABLE 0x30 /* Logical device enable */
62 #define SIO_REG_ADDR 0x60 /* Logical device address (2 bytes) */
63
64 #define SIO_NCT6681_ID 0xb270 /* for later */
65 #define SIO_NCT6683_ID 0xc730
66 #define SIO_ID_MASK 0xFFF0
67
68 static inline void
69 superio_outb(int ioreg, int reg, int val)
70 {
71 outb(reg, ioreg);
72 outb(val, ioreg + 1);
73 }
74
75 static inline int
76 superio_inb(int ioreg, int reg)
77 {
78 outb(reg, ioreg);
79 return inb(ioreg + 1);
80 }
81
82 static inline void
83 superio_select(int ioreg, int ld)
84 {
85 outb(SIO_REG_LDSEL, ioreg);
86 outb(ld, ioreg + 1);
87 }
88
89 static inline int
90 superio_enter(int ioreg)
91 {
92 /*
93 * Try to reserve <ioreg> and <ioreg + 1> for exclusive access.
94 */
95 if (!request_muxed_region(ioreg, 2, DRVNAME))
96 return -EBUSY;
97
98 outb(0x87, ioreg);
99 outb(0x87, ioreg);
100
101 return 0;
102 }
103
104 static inline void
105 superio_exit(int ioreg)
106 {
107 outb(0xaa, ioreg);
108 outb(0x02, ioreg);
109 outb(0x02, ioreg + 1);
110 release_region(ioreg, 2);
111 }
112
113 /*
114 * ISA constants
115 */
116
117 #define IOREGION_ALIGNMENT (~7)
118 #define IOREGION_OFFSET 4 /* Use EC port 1 */
119 #define IOREGION_LENGTH 4
120
121 #define EC_PAGE_REG 0
122 #define EC_INDEX_REG 1
123 #define EC_DATA_REG 2
124 #define EC_EVENT_REG 3
125
126 /* Common and NCT6683 specific data */
127
128 #define NCT6683_NUM_REG_MON 32
129 #define NCT6683_NUM_REG_FAN 16
130 #define NCT6683_NUM_REG_PWM 8
131
132 #define NCT6683_REG_MON(x) (0x100 + (x) * 2)
133 #define NCT6683_REG_FAN_RPM(x) (0x140 + (x) * 2)
134 #define NCT6683_REG_PWM(x) (0x160 + (x))
135 #define NCT6683_REG_PWM_WRITE(x) (0xa28 + (x))
136
137 #define NCT6683_REG_MON_STS(x) (0x174 + (x))
138 #define NCT6683_REG_IDLE(x) (0x178 + (x))
139
140 #define NCT6683_REG_FAN_STS(x) (0x17c + (x))
141 #define NCT6683_REG_FAN_ERRSTS 0x17e
142 #define NCT6683_REG_FAN_INITSTS 0x17f
143
144 #define NCT6683_HWM_CFG 0x180
145
146 #define NCT6683_REG_MON_CFG(x) (0x1a0 + (x))
147 #define NCT6683_REG_FANIN_CFG(x) (0x1c0 + (x))
148 #define NCT6683_REG_FANOUT_CFG(x) (0x1d0 + (x))
149
150 #define NCT6683_REG_INTEL_TEMP_MAX(x) (0x901 + (x) * 16)
151 #define NCT6683_REG_INTEL_TEMP_CRIT(x) (0x90d + (x) * 16)
152
153 #define NCT6683_REG_TEMP_HYST(x) (0x330 + (x)) /* 8 bit */
154 #define NCT6683_REG_TEMP_MAX(x) (0x350 + (x)) /* 8 bit */
155 #define NCT6683_REG_MON_HIGH(x) (0x370 + (x) * 2) /* 8 bit */
156 #define NCT6683_REG_MON_LOW(x) (0x371 + (x) * 2) /* 8 bit */
157
158 #define NCT6683_REG_FAN_MIN(x) (0x3b8 + (x) * 2) /* 16 bit */
159
160 #define NCT6683_REG_FAN_CFG_CTRL 0xa01
161 #define NCT6683_FAN_CFG_REQ 0x80
162 #define NCT6683_FAN_CFG_DONE 0x40
163
164 #define NCT6683_REG_CUSTOMER_ID 0x602
165 #define NCT6683_CUSTOMER_ID_INTEL 0x805
166 #define NCT6683_CUSTOMER_ID_MITAC 0xa0e
167
168 #define NCT6683_REG_BUILD_YEAR 0x604
169 #define NCT6683_REG_BUILD_MONTH 0x605
170 #define NCT6683_REG_BUILD_DAY 0x606
171 #define NCT6683_REG_SERIAL 0x607
172 #define NCT6683_REG_VERSION_HI 0x608
173 #define NCT6683_REG_VERSION_LO 0x609
174
175 #define NCT6683_REG_CR_CASEOPEN 0xe8
176 #define NCT6683_CR_CASEOPEN_MASK (1 << 7)
177
178 #define NCT6683_REG_CR_BEEP 0xe0
179 #define NCT6683_CR_BEEP_MASK (1 << 6)
180
181 static const char *const nct6683_mon_label[] = {
182 NULL, /* disabled */
183 "Local",
184 "Diode 0 (curr)",
185 "Diode 1 (curr)",
186 "Diode 2 (curr)",
187 "Diode 0 (volt)",
188 "Diode 1 (volt)",
189 "Diode 2 (volt)",
190 "Thermistor 14",
191 "Thermistor 15",
192 "Thermistor 16",
193 "Thermistor 0",
194 "Thermistor 1",
195 "Thermistor 2",
196 "Thermistor 3",
197 "Thermistor 4",
198 "Thermistor 5", /* 0x10 */
199 "Thermistor 6",
200 "Thermistor 7",
201 "Thermistor 8",
202 "Thermistor 9",
203 "Thermistor 10",
204 "Thermistor 11",
205 "Thermistor 12",
206 "Thermistor 13",
207 NULL, NULL, NULL, NULL, NULL, NULL, NULL,
208 "PECI 0.0", /* 0x20 */
209 "PECI 1.0",
210 "PECI 2.0",
211 "PECI 3.0",
212 "PECI 0.1",
213 "PECI 1.1",
214 "PECI 2.1",
215 "PECI 3.1",
216 "PECI DIMM 0",
217 "PECI DIMM 1",
218 "PECI DIMM 2",
219 "PECI DIMM 3",
220 NULL, NULL, NULL, NULL,
221 "PCH CPU", /* 0x30 */
222 "PCH CHIP",
223 "PCH CHIP CPU MAX",
224 "PCH MCH",
225 "PCH DIMM 0",
226 "PCH DIMM 1",
227 "PCH DIMM 2",
228 "PCH DIMM 3",
229 "SMBus 0",
230 "SMBus 1",
231 "SMBus 2",
232 "SMBus 3",
233 "SMBus 4",
234 "SMBus 5",
235 "DIMM 0",
236 "DIMM 1",
237 "DIMM 2", /* 0x40 */
238 "DIMM 3",
239 "AMD TSI Addr 90h",
240 "AMD TSI Addr 92h",
241 "AMD TSI Addr 94h",
242 "AMD TSI Addr 96h",
243 "AMD TSI Addr 98h",
244 "AMD TSI Addr 9ah",
245 "AMD TSI Addr 9ch",
246 "AMD TSI Addr 9dh",
247 NULL, NULL, NULL, NULL, NULL, NULL,
248 "Virtual 0", /* 0x50 */
249 "Virtual 1",
250 "Virtual 2",
251 "Virtual 3",
252 "Virtual 4",
253 "Virtual 5",
254 "Virtual 6",
255 "Virtual 7",
256 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
257 "VCC", /* 0x60 voltage sensors */
258 "VSB",
259 "AVSB",
260 "VTT",
261 "VBAT",
262 "VREF",
263 "VIN0",
264 "VIN1",
265 "VIN2",
266 "VIN3",
267 "VIN4",
268 "VIN5",
269 "VIN6",
270 "VIN7",
271 "VIN8",
272 "VIN9",
273 "VIN10",
274 "VIN11",
275 "VIN12",
276 "VIN13",
277 "VIN14",
278 "VIN15",
279 "VIN16",
280 };
281
282 #define NUM_MON_LABELS ARRAY_SIZE(nct6683_mon_label)
283 #define MON_VOLTAGE_START 0x60
284
285 /* ------------------------------------------------------- */
286
287 struct nct6683_data {
288 int addr; /* IO base of EC space */
289 int sioreg; /* SIO register */
290 enum kinds kind;
291 u16 customer_id;
292
293 struct device *hwmon_dev;
294 const struct attribute_group *groups[6];
295
296 int temp_num; /* number of temperature attributes */
297 u8 temp_index[NCT6683_NUM_REG_MON];
298 u8 temp_src[NCT6683_NUM_REG_MON];
299
300 u8 in_num; /* number of voltage attributes */
301 u8 in_index[NCT6683_NUM_REG_MON];
302 u8 in_src[NCT6683_NUM_REG_MON];
303
304 struct mutex update_lock; /* used to protect sensor updates */
305 bool valid; /* true if following fields are valid */
306 unsigned long last_updated; /* In jiffies */
307
308 /* Voltage attribute values */
309 u8 in[3][NCT6683_NUM_REG_MON]; /* [0]=in, [1]=in_max, [2]=in_min */
310
311 /* Temperature attribute values */
312 s16 temp_in[NCT6683_NUM_REG_MON];
313 s8 temp[4][NCT6683_NUM_REG_MON];/* [0]=min, [1]=max, [2]=hyst,
314 * [3]=crit
315 */
316
317 /* Fan attribute values */
318 unsigned int rpm[NCT6683_NUM_REG_FAN];
319 u16 fan_min[NCT6683_NUM_REG_FAN];
320 u8 fanin_cfg[NCT6683_NUM_REG_FAN];
321 u8 fanout_cfg[NCT6683_NUM_REG_FAN];
322 u16 have_fan; /* some fan inputs can be disabled */
323
324 u8 have_pwm;
325 u8 pwm[NCT6683_NUM_REG_PWM];
326
327 #ifdef CONFIG_PM
328 /* Remember extra register values over suspend/resume */
329 u8 hwm_cfg;
330 #endif
331 };
332
333 struct nct6683_sio_data {
334 int sioreg;
335 enum kinds kind;
336 };
337
338 struct sensor_device_template {
339 struct device_attribute dev_attr;
340 union {
341 struct {
342 u8 nr;
343 u8 index;
344 } s;
345 int index;
346 } u;
347 bool s2; /* true if both index and nr are used */
348 };
349
350 struct sensor_device_attr_u {
351 union {
352 struct sensor_device_attribute a1;
353 struct sensor_device_attribute_2 a2;
354 } u;
355 char name[32];
356 };
357
358 #define __TEMPLATE_ATTR(_template, _mode, _show, _store) { \
359 .attr = {.name = _template, .mode = _mode }, \
360 .show = _show, \
361 .store = _store, \
362 }
363
364 #define SENSOR_DEVICE_TEMPLATE(_template, _mode, _show, _store, _index) \
365 { .dev_attr = __TEMPLATE_ATTR(_template, _mode, _show, _store), \
366 .u.index = _index, \
367 .s2 = false }
368
369 #define SENSOR_DEVICE_TEMPLATE_2(_template, _mode, _show, _store, \
370 _nr, _index) \
371 { .dev_attr = __TEMPLATE_ATTR(_template, _mode, _show, _store), \
372 .u.s.index = _index, \
373 .u.s.nr = _nr, \
374 .s2 = true }
375
376 #define SENSOR_TEMPLATE(_name, _template, _mode, _show, _store, _index) \
377 static struct sensor_device_template sensor_dev_template_##_name \
378 = SENSOR_DEVICE_TEMPLATE(_template, _mode, _show, _store, \
379 _index)
380
381 #define SENSOR_TEMPLATE_2(_name, _template, _mode, _show, _store, \
382 _nr, _index) \
383 static struct sensor_device_template sensor_dev_template_##_name \
384 = SENSOR_DEVICE_TEMPLATE_2(_template, _mode, _show, _store, \
385 _nr, _index)
386
387 struct sensor_template_group {
388 struct sensor_device_template **templates;
389 umode_t (*is_visible)(struct kobject *, struct attribute *, int);
390 int base;
391 };
392
393 static struct attribute_group *
394 nct6683_create_attr_group(struct device *dev,
395 const struct sensor_template_group *tg,
396 int repeat)
397 {
398 struct sensor_device_attribute_2 *a2;
399 struct sensor_device_attribute *a;
400 struct sensor_device_template **t;
401 struct sensor_device_attr_u *su;
402 struct attribute_group *group;
403 struct attribute **attrs;
404 int i, j, count;
405
406 if (repeat <= 0)
407 return ERR_PTR(-EINVAL);
408
409 t = tg->templates;
410 for (count = 0; *t; t++, count++)
411 ;
412
413 if (count == 0)
414 return ERR_PTR(-EINVAL);
415
416 group = devm_kzalloc(dev, sizeof(*group), GFP_KERNEL);
417 if (group == NULL)
418 return ERR_PTR(-ENOMEM);
419
420 attrs = devm_kcalloc(dev, repeat * count + 1, sizeof(*attrs),
421 GFP_KERNEL);
422 if (attrs == NULL)
423 return ERR_PTR(-ENOMEM);
424
425 su = devm_kzalloc(dev, array3_size(repeat, count, sizeof(*su)),
426 GFP_KERNEL);
427 if (su == NULL)
428 return ERR_PTR(-ENOMEM);
429
430 group->attrs = attrs;
431 group->is_visible = tg->is_visible;
432
433 for (i = 0; i < repeat; i++) {
434 t = tg->templates;
435 for (j = 0; *t != NULL; j++) {
436 snprintf(su->name, sizeof(su->name),
437 (*t)->dev_attr.attr.name, tg->base + i);
438 if ((*t)->s2) {
439 a2 = &su->u.a2;
440 sysfs_attr_init(&a2->dev_attr.attr);
441 a2->dev_attr.attr.name = su->name;
442 a2->nr = (*t)->u.s.nr + i;
443 a2->index = (*t)->u.s.index;
444 a2->dev_attr.attr.mode =
445 (*t)->dev_attr.attr.mode;
446 a2->dev_attr.show = (*t)->dev_attr.show;
447 a2->dev_attr.store = (*t)->dev_attr.store;
448 *attrs = &a2->dev_attr.attr;
449 } else {
450 a = &su->u.a1;
451 sysfs_attr_init(&a->dev_attr.attr);
452 a->dev_attr.attr.name = su->name;
453 a->index = (*t)->u.index + i;
454 a->dev_attr.attr.mode =
455 (*t)->dev_attr.attr.mode;
456 a->dev_attr.show = (*t)->dev_attr.show;
457 a->dev_attr.store = (*t)->dev_attr.store;
458 *attrs = &a->dev_attr.attr;
459 }
460 attrs++;
461 su++;
462 t++;
463 }
464 }
465
466 return group;
467 }
468
469 /* LSB is 16 mV, except for the following sources, where it is 32 mV */
470 #define MON_SRC_VCC 0x60
471 #define MON_SRC_VSB 0x61
472 #define MON_SRC_AVSB 0x62
473 #define MON_SRC_VBAT 0x64
474
475 static inline long in_from_reg(u16 reg, u8 src)
476 {
477 int scale = 16;
478
479 if (src == MON_SRC_VCC || src == MON_SRC_VSB || src == MON_SRC_AVSB ||
480 src == MON_SRC_VBAT)
481 scale <<= 1;
482 return reg * scale;
483 }
484
485 static inline u16 in_to_reg(u32 val, u8 src)
486 {
487 int scale = 16;
488
489 if (src == MON_SRC_VCC || src == MON_SRC_VSB || src == MON_SRC_AVSB ||
490 src == MON_SRC_VBAT)
491 scale <<= 1;
492
493 return clamp_val(DIV_ROUND_CLOSEST(val, scale), 0, 127);
494 }
495
496 static u16 nct6683_read(struct nct6683_data *data, u16 reg)
497 {
498 int res;
499
500 outb_p(0xff, data->addr + EC_PAGE_REG); /* unlock */
501 outb_p(reg >> 8, data->addr + EC_PAGE_REG);
502 outb_p(reg & 0xff, data->addr + EC_INDEX_REG);
503 res = inb_p(data->addr + EC_DATA_REG);
504 return res;
505 }
506
507 static u16 nct6683_read16(struct nct6683_data *data, u16 reg)
508 {
509 return (nct6683_read(data, reg) << 8) | nct6683_read(data, reg + 1);
510 }
511
512 static void nct6683_write(struct nct6683_data *data, u16 reg, u16 value)
513 {
514 outb_p(0xff, data->addr + EC_PAGE_REG); /* unlock */
515 outb_p(reg >> 8, data->addr + EC_PAGE_REG);
516 outb_p(reg & 0xff, data->addr + EC_INDEX_REG);
517 outb_p(value & 0xff, data->addr + EC_DATA_REG);
518 }
519
520 static int get_in_reg(struct nct6683_data *data, int nr, int index)
521 {
522 int ch = data->in_index[index];
523 int reg = -EINVAL;
524
525 switch (nr) {
526 case 0:
527 reg = NCT6683_REG_MON(ch);
528 break;
529 case 1:
530 if (data->customer_id != NCT6683_CUSTOMER_ID_INTEL)
531 reg = NCT6683_REG_MON_LOW(ch);
532 break;
533 case 2:
534 if (data->customer_id != NCT6683_CUSTOMER_ID_INTEL)
535 reg = NCT6683_REG_MON_HIGH(ch);
536 break;
537 default:
538 break;
539 }
540 return reg;
541 }
542
543 static int get_temp_reg(struct nct6683_data *data, int nr, int index)
544 {
545 int ch = data->temp_index[index];
546 int reg = -EINVAL;
547
548 switch (data->customer_id) {
549 case NCT6683_CUSTOMER_ID_INTEL:
550 switch (nr) {
551 default:
552 case 1: /* max */
553 reg = NCT6683_REG_INTEL_TEMP_MAX(ch);
554 break;
555 case 3: /* crit */
556 reg = NCT6683_REG_INTEL_TEMP_CRIT(ch);
557 break;
558 }
559 break;
560 case NCT6683_CUSTOMER_ID_MITAC:
561 default:
562 switch (nr) {
563 default:
564 case 0: /* min */
565 reg = NCT6683_REG_MON_LOW(ch);
566 break;
567 case 1: /* max */
568 reg = NCT6683_REG_TEMP_MAX(ch);
569 break;
570 case 2: /* hyst */
571 reg = NCT6683_REG_TEMP_HYST(ch);
572 break;
573 case 3: /* crit */
574 reg = NCT6683_REG_MON_HIGH(ch);
575 break;
576 }
577 break;
578 }
579 return reg;
580 }
581
582 static void nct6683_update_pwm(struct device *dev)
583 {
584 struct nct6683_data *data = dev_get_drvdata(dev);
585 int i;
586
587 for (i = 0; i < NCT6683_NUM_REG_PWM; i++) {
588 if (!(data->have_pwm & (1 << i)))
589 continue;
590 data->pwm[i] = nct6683_read(data, NCT6683_REG_PWM(i));
591 }
592 }
593
594 static struct nct6683_data *nct6683_update_device(struct device *dev)
595 {
596 struct nct6683_data *data = dev_get_drvdata(dev);
597 int i, j;
598
599 mutex_lock(&data->update_lock);
600
601 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
602 /* Measured voltages and limits */
603 for (i = 0; i < data->in_num; i++) {
604 for (j = 0; j < 3; j++) {
605 int reg = get_in_reg(data, j, i);
606
607 if (reg >= 0)
608 data->in[j][i] =
609 nct6683_read(data, reg);
610 }
611 }
612
613 /* Measured temperatures and limits */
614 for (i = 0; i < data->temp_num; i++) {
615 u8 ch = data->temp_index[i];
616
617 data->temp_in[i] = nct6683_read16(data,
618 NCT6683_REG_MON(ch));
619 for (j = 0; j < 4; j++) {
620 int reg = get_temp_reg(data, j, i);
621
622 if (reg >= 0)
623 data->temp[j][i] =
624 nct6683_read(data, reg);
625 }
626 }
627
628 /* Measured fan speeds and limits */
629 for (i = 0; i < ARRAY_SIZE(data->rpm); i++) {
630 if (!(data->have_fan & (1 << i)))
631 continue;
632
633 data->rpm[i] = nct6683_read16(data,
634 NCT6683_REG_FAN_RPM(i));
635 data->fan_min[i] = nct6683_read16(data,
636 NCT6683_REG_FAN_MIN(i));
637 }
638
639 nct6683_update_pwm(dev);
640
641 data->last_updated = jiffies;
642 data->valid = true;
643 }
644
645 mutex_unlock(&data->update_lock);
646 return data;
647 }
648
649 /*
650 * Sysfs callback functions
651 */
652 static ssize_t
653 show_in_label(struct device *dev, struct device_attribute *attr, char *buf)
654 {
655 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
656 struct nct6683_data *data = nct6683_update_device(dev);
657 int nr = sattr->index;
658
659 return sprintf(buf, "%s\n", nct6683_mon_label[data->in_src[nr]]);
660 }
661
662 static ssize_t
663 show_in_reg(struct device *dev, struct device_attribute *attr, char *buf)
664 {
665 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
666 struct nct6683_data *data = nct6683_update_device(dev);
667 int index = sattr->index;
668 int nr = sattr->nr;
669
670 return sprintf(buf, "%ld\n",
671 in_from_reg(data->in[index][nr], data->in_index[index]));
672 }
673
674 static umode_t nct6683_in_is_visible(struct kobject *kobj,
675 struct attribute *attr, int index)
676 {
677 struct device *dev = container_of(kobj, struct device, kobj);
678 struct nct6683_data *data = dev_get_drvdata(dev);
679 int nr = index % 4; /* attribute */
680
681 /*
682 * Voltage limits exist for Intel boards,
683 * but register location and encoding is unknown
684 */
685 if ((nr == 2 || nr == 3) &&
686 data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
687 return 0;
688
689 return attr->mode;
690 }
691
692 SENSOR_TEMPLATE(in_label, "in%d_label", S_IRUGO, show_in_label, NULL, 0);
693 SENSOR_TEMPLATE_2(in_input, "in%d_input", S_IRUGO, show_in_reg, NULL, 0, 0);
694 SENSOR_TEMPLATE_2(in_min, "in%d_min", S_IRUGO, show_in_reg, NULL, 0, 1);
695 SENSOR_TEMPLATE_2(in_max, "in%d_max", S_IRUGO, show_in_reg, NULL, 0, 2);
696
697 static struct sensor_device_template *nct6683_attributes_in_template[] = {
698 &sensor_dev_template_in_label,
699 &sensor_dev_template_in_input,
700 &sensor_dev_template_in_min,
701 &sensor_dev_template_in_max,
702 NULL
703 };
704
705 static const struct sensor_template_group nct6683_in_template_group = {
706 .templates = nct6683_attributes_in_template,
707 .is_visible = nct6683_in_is_visible,
708 };
709
710 static ssize_t
711 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
712 {
713 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
714 struct nct6683_data *data = nct6683_update_device(dev);
715
716 return sprintf(buf, "%d\n", data->rpm[sattr->index]);
717 }
718
719 static ssize_t
720 show_fan_min(struct device *dev, struct device_attribute *attr, char *buf)
721 {
722 struct nct6683_data *data = nct6683_update_device(dev);
723 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
724 int nr = sattr->index;
725
726 return sprintf(buf, "%d\n", data->fan_min[nr]);
727 }
728
729 static ssize_t
730 show_fan_pulses(struct device *dev, struct device_attribute *attr, char *buf)
731 {
732 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
733 struct nct6683_data *data = nct6683_update_device(dev);
734
735 return sprintf(buf, "%d\n",
736 ((data->fanin_cfg[sattr->index] >> 5) & 0x03) + 1);
737 }
738
739 static umode_t nct6683_fan_is_visible(struct kobject *kobj,
740 struct attribute *attr, int index)
741 {
742 struct device *dev = container_of(kobj, struct device, kobj);
743 struct nct6683_data *data = dev_get_drvdata(dev);
744 int fan = index / 3; /* fan index */
745 int nr = index % 3; /* attribute index */
746
747 if (!(data->have_fan & (1 << fan)))
748 return 0;
749
750 /*
751 * Intel may have minimum fan speed limits,
752 * but register location and encoding are unknown.
753 */
754 if (nr == 2 && data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
755 return 0;
756
757 return attr->mode;
758 }
759
760 SENSOR_TEMPLATE(fan_input, "fan%d_input", S_IRUGO, show_fan, NULL, 0);
761 SENSOR_TEMPLATE(fan_pulses, "fan%d_pulses", S_IRUGO, show_fan_pulses, NULL, 0);
762 SENSOR_TEMPLATE(fan_min, "fan%d_min", S_IRUGO, show_fan_min, NULL, 0);
763
764 /*
765 * nct6683_fan_is_visible uses the index into the following array
766 * to determine if attributes should be created or not.
767 * Any change in order or content must be matched.
768 */
769 static struct sensor_device_template *nct6683_attributes_fan_template[] = {
770 &sensor_dev_template_fan_input,
771 &sensor_dev_template_fan_pulses,
772 &sensor_dev_template_fan_min,
773 NULL
774 };
775
776 static const struct sensor_template_group nct6683_fan_template_group = {
777 .templates = nct6683_attributes_fan_template,
778 .is_visible = nct6683_fan_is_visible,
779 .base = 1,
780 };
781
782 static ssize_t
783 show_temp_label(struct device *dev, struct device_attribute *attr, char *buf)
784 {
785 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
786 struct nct6683_data *data = nct6683_update_device(dev);
787 int nr = sattr->index;
788
789 return sprintf(buf, "%s\n", nct6683_mon_label[data->temp_src[nr]]);
790 }
791
792 static ssize_t
793 show_temp8(struct device *dev, struct device_attribute *attr, char *buf)
794 {
795 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
796 struct nct6683_data *data = nct6683_update_device(dev);
797 int index = sattr->index;
798 int nr = sattr->nr;
799
800 return sprintf(buf, "%d\n", data->temp[index][nr] * 1000);
801 }
802
803 static ssize_t
804 show_temp_hyst(struct device *dev, struct device_attribute *attr, char *buf)
805 {
806 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
807 struct nct6683_data *data = nct6683_update_device(dev);
808 int nr = sattr->index;
809 int temp = data->temp[1][nr] - data->temp[2][nr];
810
811 return sprintf(buf, "%d\n", temp * 1000);
812 }
813
814 static ssize_t
815 show_temp16(struct device *dev, struct device_attribute *attr, char *buf)
816 {
817 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
818 struct nct6683_data *data = nct6683_update_device(dev);
819 int index = sattr->index;
820
821 return sprintf(buf, "%d\n", (data->temp_in[index] / 128) * 500);
822 }
823
824 /*
825 * Temperature sensor type is determined by temperature source
826 * and can not be modified.
827 * 0x02..0x07: Thermal diode
828 * 0x08..0x18: Thermistor
829 * 0x20..0x2b: Intel PECI
830 * 0x42..0x49: AMD TSI
831 * Others are unspecified (not visible)
832 */
833
834 static int get_temp_type(u8 src)
835 {
836 if (src >= 0x02 && src <= 0x07)
837 return 3; /* thermal diode */
838 else if (src >= 0x08 && src <= 0x18)
839 return 4; /* thermistor */
840 else if (src >= 0x20 && src <= 0x2b)
841 return 6; /* PECI */
842 else if (src >= 0x42 && src <= 0x49)
843 return 5;
844
845 return 0;
846 }
847
848 static ssize_t
849 show_temp_type(struct device *dev, struct device_attribute *attr, char *buf)
850 {
851 struct nct6683_data *data = nct6683_update_device(dev);
852 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
853 int nr = sattr->index;
854 return sprintf(buf, "%d\n", get_temp_type(data->temp_src[nr]));
855 }
856
857 static umode_t nct6683_temp_is_visible(struct kobject *kobj,
858 struct attribute *attr, int index)
859 {
860 struct device *dev = container_of(kobj, struct device, kobj);
861 struct nct6683_data *data = dev_get_drvdata(dev);
862 int temp = index / 7; /* temp index */
863 int nr = index % 7; /* attribute index */
864
865 /*
866 * Intel does not have low temperature limits or temperature hysteresis
867 * registers, or at least register location and encoding is unknown.
868 */
869 if ((nr == 2 || nr == 4) &&
870 data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
871 return 0;
872
873 if (nr == 6 && get_temp_type(data->temp_src[temp]) == 0)
874 return 0; /* type */
875
876 return attr->mode;
877 }
878
879 SENSOR_TEMPLATE(temp_input, "temp%d_input", S_IRUGO, show_temp16, NULL, 0);
880 SENSOR_TEMPLATE(temp_label, "temp%d_label", S_IRUGO, show_temp_label, NULL, 0);
881 SENSOR_TEMPLATE_2(temp_min, "temp%d_min", S_IRUGO, show_temp8, NULL, 0, 0);
882 SENSOR_TEMPLATE_2(temp_max, "temp%d_max", S_IRUGO, show_temp8, NULL, 0, 1);
883 SENSOR_TEMPLATE(temp_max_hyst, "temp%d_max_hyst", S_IRUGO, show_temp_hyst, NULL,
884 0);
885 SENSOR_TEMPLATE_2(temp_crit, "temp%d_crit", S_IRUGO, show_temp8, NULL, 0, 3);
886 SENSOR_TEMPLATE(temp_type, "temp%d_type", S_IRUGO, show_temp_type, NULL, 0);
887
888 /*
889 * nct6683_temp_is_visible uses the index into the following array
890 * to determine if attributes should be created or not.
891 * Any change in order or content must be matched.
892 */
893 static struct sensor_device_template *nct6683_attributes_temp_template[] = {
894 &sensor_dev_template_temp_input,
895 &sensor_dev_template_temp_label,
896 &sensor_dev_template_temp_min, /* 2 */
897 &sensor_dev_template_temp_max, /* 3 */
898 &sensor_dev_template_temp_max_hyst, /* 4 */
899 &sensor_dev_template_temp_crit, /* 5 */
900 &sensor_dev_template_temp_type, /* 6 */
901 NULL
902 };
903
904 static const struct sensor_template_group nct6683_temp_template_group = {
905 .templates = nct6683_attributes_temp_template,
906 .is_visible = nct6683_temp_is_visible,
907 .base = 1,
908 };
909
910 static ssize_t
911 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
912 {
913 struct nct6683_data *data = nct6683_update_device(dev);
914 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
915 int index = sattr->index;
916
917 return sprintf(buf, "%d\n", data->pwm[index]);
918 }
919
920 static ssize_t
921 store_pwm(struct device *dev, struct device_attribute *attr, const char *buf,
922 size_t count)
923 {
924 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
925 struct nct6683_data *data = dev_get_drvdata(dev);
926 int index = sattr->index;
927 unsigned long val;
928
929 if (kstrtoul(buf, 10, &val) || val > 255)
930 return -EINVAL;
931
932 mutex_lock(&data->update_lock);
933 nct6683_write(data, NCT6683_REG_FAN_CFG_CTRL, NCT6683_FAN_CFG_REQ);
934 usleep_range(1000, 2000);
935 nct6683_write(data, NCT6683_REG_PWM_WRITE(index), val);
936 nct6683_write(data, NCT6683_REG_FAN_CFG_CTRL, NCT6683_FAN_CFG_DONE);
937 mutex_unlock(&data->update_lock);
938
939 return count;
940 }
941
942 SENSOR_TEMPLATE(pwm, "pwm%d", S_IRUGO, show_pwm, store_pwm, 0);
943
944 static umode_t nct6683_pwm_is_visible(struct kobject *kobj,
945 struct attribute *attr, int index)
946 {
947 struct device *dev = container_of(kobj, struct device, kobj);
948 struct nct6683_data *data = dev_get_drvdata(dev);
949 int pwm = index; /* pwm index */
950
951 if (!(data->have_pwm & (1 << pwm)))
952 return 0;
953
954 /* Only update pwm values for Mitac boards */
955 if (data->customer_id == NCT6683_CUSTOMER_ID_MITAC)
956 return attr->mode | S_IWUSR;
957
958 return attr->mode;
959 }
960
961 static struct sensor_device_template *nct6683_attributes_pwm_template[] = {
962 &sensor_dev_template_pwm,
963 NULL
964 };
965
966 static const struct sensor_template_group nct6683_pwm_template_group = {
967 .templates = nct6683_attributes_pwm_template,
968 .is_visible = nct6683_pwm_is_visible,
969 .base = 1,
970 };
971
972 static ssize_t
973 beep_enable_show(struct device *dev, struct device_attribute *attr, char *buf)
974 {
975 struct nct6683_data *data = dev_get_drvdata(dev);
976 int ret;
977 u8 reg;
978
979 mutex_lock(&data->update_lock);
980
981 ret = superio_enter(data->sioreg);
982 if (ret)
983 goto error;
984 superio_select(data->sioreg, NCT6683_LD_HWM);
985 reg = superio_inb(data->sioreg, NCT6683_REG_CR_BEEP);
986 superio_exit(data->sioreg);
987
988 mutex_unlock(&data->update_lock);
989
990 return sprintf(buf, "%u\n", !!(reg & NCT6683_CR_BEEP_MASK));
991
992 error:
993 mutex_unlock(&data->update_lock);
994 return ret;
995 }
996
997 static ssize_t
998 beep_enable_store(struct device *dev, struct device_attribute *attr,
999 const char *buf, size_t count)
1000 {
1001 struct nct6683_data *data = dev_get_drvdata(dev);
1002 unsigned long val;
1003 u8 reg;
1004 int ret;
1005
1006 if (kstrtoul(buf, 10, &val) || (val != 0 && val != 1))
1007 return -EINVAL;
1008
1009 mutex_lock(&data->update_lock);
1010
1011 ret = superio_enter(data->sioreg);
1012 if (ret) {
1013 count = ret;
1014 goto error;
1015 }
1016
1017 superio_select(data->sioreg, NCT6683_LD_HWM);
1018 reg = superio_inb(data->sioreg, NCT6683_REG_CR_BEEP);
1019 if (val)
1020 reg |= NCT6683_CR_BEEP_MASK;
1021 else
1022 reg &= ~NCT6683_CR_BEEP_MASK;
1023 superio_outb(data->sioreg, NCT6683_REG_CR_BEEP, reg);
1024 superio_exit(data->sioreg);
1025 error:
1026 mutex_unlock(&data->update_lock);
1027 return count;
1028 }
1029
1030 /* Case open detection */
1031
1032 static ssize_t
1033 intrusion0_alarm_show(struct device *dev, struct device_attribute *attr,
1034 char *buf)
1035 {
1036 struct nct6683_data *data = dev_get_drvdata(dev);
1037 int ret;
1038 u8 reg;
1039
1040 mutex_lock(&data->update_lock);
1041
1042 ret = superio_enter(data->sioreg);
1043 if (ret)
1044 goto error;
1045 superio_select(data->sioreg, NCT6683_LD_ACPI);
1046 reg = superio_inb(data->sioreg, NCT6683_REG_CR_CASEOPEN);
1047 superio_exit(data->sioreg);
1048
1049 mutex_unlock(&data->update_lock);
1050
1051 return sprintf(buf, "%u\n", !(reg & NCT6683_CR_CASEOPEN_MASK));
1052
1053 error:
1054 mutex_unlock(&data->update_lock);
1055 return ret;
1056 }
1057
1058 static ssize_t
1059 intrusion0_alarm_store(struct device *dev, struct device_attribute *attr,
1060 const char *buf, size_t count)
1061 {
1062 struct nct6683_data *data = dev_get_drvdata(dev);
1063 unsigned long val;
1064 u8 reg;
1065 int ret;
1066
1067 if (kstrtoul(buf, 10, &val) || val != 0)
1068 return -EINVAL;
1069
1070 mutex_lock(&data->update_lock);
1071
1072 /*
1073 * Use CR registers to clear caseopen status.
1074 * Caseopen is activ low, clear by writing 1 into the register.
1075 */
1076
1077 ret = superio_enter(data->sioreg);
1078 if (ret) {
1079 count = ret;
1080 goto error;
1081 }
1082
1083 superio_select(data->sioreg, NCT6683_LD_ACPI);
1084 reg = superio_inb(data->sioreg, NCT6683_REG_CR_CASEOPEN);
1085 reg |= NCT6683_CR_CASEOPEN_MASK;
1086 superio_outb(data->sioreg, NCT6683_REG_CR_CASEOPEN, reg);
1087 reg &= ~NCT6683_CR_CASEOPEN_MASK;
1088 superio_outb(data->sioreg, NCT6683_REG_CR_CASEOPEN, reg);
1089 superio_exit(data->sioreg);
1090
1091 data->valid = false; /* Force cache refresh */
1092 error:
1093 mutex_unlock(&data->update_lock);
1094 return count;
1095 }
1096
1097 static DEVICE_ATTR_RW(intrusion0_alarm);
1098 static DEVICE_ATTR_RW(beep_enable);
1099
1100 static struct attribute *nct6683_attributes_other[] = {
1101 &dev_attr_intrusion0_alarm.attr,
1102 &dev_attr_beep_enable.attr,
1103 NULL
1104 };
1105
1106 static const struct attribute_group nct6683_group_other = {
1107 .attrs = nct6683_attributes_other,
1108 };
1109
1110 /* Get the monitoring functions started */
1111 static inline void nct6683_init_device(struct nct6683_data *data)
1112 {
1113 u8 tmp;
1114
1115 /* Start hardware monitoring if needed */
1116 tmp = nct6683_read(data, NCT6683_HWM_CFG);
1117 if (!(tmp & 0x80))
1118 nct6683_write(data, NCT6683_HWM_CFG, tmp | 0x80);
1119 }
1120
1121 /*
1122 * There are a total of 24 fan inputs. Each can be configured as input
1123 * or as output. A maximum of 16 inputs and 8 outputs is configurable.
1124 */
1125 static void
1126 nct6683_setup_fans(struct nct6683_data *data)
1127 {
1128 int i;
1129 u8 reg;
1130
1131 for (i = 0; i < NCT6683_NUM_REG_FAN; i++) {
1132 reg = nct6683_read(data, NCT6683_REG_FANIN_CFG(i));
1133 if (reg & 0x80)
1134 data->have_fan |= 1 << i;
1135 data->fanin_cfg[i] = reg;
1136 }
1137 for (i = 0; i < NCT6683_NUM_REG_PWM; i++) {
1138 reg = nct6683_read(data, NCT6683_REG_FANOUT_CFG(i));
1139 if (reg & 0x80)
1140 data->have_pwm |= 1 << i;
1141 data->fanout_cfg[i] = reg;
1142 }
1143 }
1144
1145 /*
1146 * Translation from monitoring register to temperature and voltage attributes
1147 * ==========================================================================
1148 *
1149 * There are a total of 32 monitoring registers. Each can be assigned to either
1150 * a temperature or voltage monitoring source.
1151 * NCT6683_REG_MON_CFG(x) defines assignment for each monitoring source.
1152 *
1153 * Temperature and voltage attribute mapping is determined by walking through
1154 * the NCT6683_REG_MON_CFG registers. If the assigned source is
1155 * a temperature, temp_index[n] is set to the monitor register index, and
1156 * temp_src[n] is set to the temperature source. If the assigned source is
1157 * a voltage, the respective values are stored in in_index[] and in_src[],
1158 * respectively.
1159 */
1160
1161 static void nct6683_setup_sensors(struct nct6683_data *data)
1162 {
1163 u8 reg;
1164 int i;
1165
1166 data->temp_num = 0;
1167 data->in_num = 0;
1168 for (i = 0; i < NCT6683_NUM_REG_MON; i++) {
1169 reg = nct6683_read(data, NCT6683_REG_MON_CFG(i)) & 0x7f;
1170 /* Ignore invalid assignments */
1171 if (reg >= NUM_MON_LABELS)
1172 continue;
1173 /* Skip if disabled or reserved */
1174 if (nct6683_mon_label[reg] == NULL)
1175 continue;
1176 if (reg < MON_VOLTAGE_START) {
1177 data->temp_index[data->temp_num] = i;
1178 data->temp_src[data->temp_num] = reg;
1179 data->temp_num++;
1180 } else {
1181 data->in_index[data->in_num] = i;
1182 data->in_src[data->in_num] = reg;
1183 data->in_num++;
1184 }
1185 }
1186 }
1187
1188 static int nct6683_probe(struct platform_device *pdev)
1189 {
1190 struct device *dev = &pdev->dev;
1191 struct nct6683_sio_data *sio_data = dev->platform_data;
1192 struct attribute_group *group;
1193 struct nct6683_data *data;
1194 struct device *hwmon_dev;
1195 struct resource *res;
1196 int groups = 0;
1197 char build[16];
1198
1199 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1200 if (!devm_request_region(dev, res->start, IOREGION_LENGTH, DRVNAME))
1201 return -EBUSY;
1202
1203 data = devm_kzalloc(dev, sizeof(struct nct6683_data), GFP_KERNEL);
1204 if (!data)
1205 return -ENOMEM;
1206
1207 data->kind = sio_data->kind;
1208 data->sioreg = sio_data->sioreg;
1209 data->addr = res->start;
1210 mutex_init(&data->update_lock);
1211 platform_set_drvdata(pdev, data);
1212
1213 data->customer_id = nct6683_read16(data, NCT6683_REG_CUSTOMER_ID);
1214
1215 /* By default only instantiate driver if the customer ID is known */
1216 switch (data->customer_id) {
1217 case NCT6683_CUSTOMER_ID_INTEL:
1218 break;
1219 case NCT6683_CUSTOMER_ID_MITAC:
1220 break;
1221 default:
1222 if (!force)
1223 return -ENODEV;
1224 }
1225
1226 nct6683_init_device(data);
1227 nct6683_setup_fans(data);
1228 nct6683_setup_sensors(data);
1229
1230 /* Register sysfs hooks */
1231
1232 if (data->have_pwm) {
1233 group = nct6683_create_attr_group(dev,
1234 &nct6683_pwm_template_group,
1235 fls(data->have_pwm));
1236 if (IS_ERR(group))
1237 return PTR_ERR(group);
1238 data->groups[groups++] = group;
1239 }
1240
1241 if (data->in_num) {
1242 group = nct6683_create_attr_group(dev,
1243 &nct6683_in_template_group,
1244 data->in_num);
1245 if (IS_ERR(group))
1246 return PTR_ERR(group);
1247 data->groups[groups++] = group;
1248 }
1249
1250 if (data->have_fan) {
1251 group = nct6683_create_attr_group(dev,
1252 &nct6683_fan_template_group,
1253 fls(data->have_fan));
1254 if (IS_ERR(group))
1255 return PTR_ERR(group);
1256 data->groups[groups++] = group;
1257 }
1258
1259 if (data->temp_num) {
1260 group = nct6683_create_attr_group(dev,
1261 &nct6683_temp_template_group,
1262 data->temp_num);
1263 if (IS_ERR(group))
1264 return PTR_ERR(group);
1265 data->groups[groups++] = group;
1266 }
1267 data->groups[groups++] = &nct6683_group_other;
1268
1269 if (data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
1270 scnprintf(build, sizeof(build), "%02x/%02x/%02x",
1271 nct6683_read(data, NCT6683_REG_BUILD_MONTH),
1272 nct6683_read(data, NCT6683_REG_BUILD_DAY),
1273 nct6683_read(data, NCT6683_REG_BUILD_YEAR));
1274 else
1275 scnprintf(build, sizeof(build), "%02d/%02d/%02d",
1276 nct6683_read(data, NCT6683_REG_BUILD_MONTH),
1277 nct6683_read(data, NCT6683_REG_BUILD_DAY),
1278 nct6683_read(data, NCT6683_REG_BUILD_YEAR));
1279
1280 dev_info(dev, "%s EC firmware version %d.%d build %s\n",
1281 nct6683_chip_names[data->kind],
1282 nct6683_read(data, NCT6683_REG_VERSION_HI),
1283 nct6683_read(data, NCT6683_REG_VERSION_LO),
1284 build);
1285
1286 hwmon_dev = devm_hwmon_device_register_with_groups(dev,
1287 nct6683_device_names[data->kind], data, data->groups);
1288 return PTR_ERR_OR_ZERO(hwmon_dev);
1289 }
1290
1291 #ifdef CONFIG_PM
1292 static int nct6683_suspend(struct device *dev)
1293 {
1294 struct nct6683_data *data = nct6683_update_device(dev);
1295
1296 mutex_lock(&data->update_lock);
1297 data->hwm_cfg = nct6683_read(data, NCT6683_HWM_CFG);
1298 mutex_unlock(&data->update_lock);
1299
1300 return 0;
1301 }
1302
1303 static int nct6683_resume(struct device *dev)
1304 {
1305 struct nct6683_data *data = dev_get_drvdata(dev);
1306
1307 mutex_lock(&data->update_lock);
1308
1309 nct6683_write(data, NCT6683_HWM_CFG, data->hwm_cfg);
1310
1311 /* Force re-reading all values */
1312 data->valid = false;
1313 mutex_unlock(&data->update_lock);
1314
1315 return 0;
1316 }
1317
1318 static const struct dev_pm_ops nct6683_dev_pm_ops = {
1319 .suspend = nct6683_suspend,
1320 .resume = nct6683_resume,
1321 .freeze = nct6683_suspend,
1322 .restore = nct6683_resume,
1323 };
1324
1325 #define NCT6683_DEV_PM_OPS (&nct6683_dev_pm_ops)
1326 #else
1327 #define NCT6683_DEV_PM_OPS NULL
1328 #endif /* CONFIG_PM */
1329
1330 static struct platform_driver nct6683_driver = {
1331 .driver = {
1332 .name = DRVNAME,
1333 .pm = NCT6683_DEV_PM_OPS,
1334 },
1335 .probe = nct6683_probe,
1336 };
1337
1338 static int __init nct6683_find(int sioaddr, struct nct6683_sio_data *sio_data)
1339 {
1340 int addr;
1341 u16 val;
1342 int err;
1343
1344 err = superio_enter(sioaddr);
1345 if (err)
1346 return err;
1347
1348 val = (superio_inb(sioaddr, SIO_REG_DEVID) << 8)
1349 | superio_inb(sioaddr, SIO_REG_DEVID + 1);
1350
1351 switch (val & SIO_ID_MASK) {
1352 case SIO_NCT6683_ID:
1353 sio_data->kind = nct6683;
1354 break;
1355 default:
1356 if (val != 0xffff)
1357 pr_debug("unsupported chip ID: 0x%04x\n", val);
1358 goto fail;
1359 }
1360
1361 /* We have a known chip, find the HWM I/O address */
1362 superio_select(sioaddr, NCT6683_LD_HWM);
1363 val = (superio_inb(sioaddr, SIO_REG_ADDR) << 8)
1364 | superio_inb(sioaddr, SIO_REG_ADDR + 1);
1365 addr = val & IOREGION_ALIGNMENT;
1366 if (addr == 0) {
1367 pr_err("EC base I/O port unconfigured\n");
1368 goto fail;
1369 }
1370
1371 /* Activate logical device if needed */
1372 val = superio_inb(sioaddr, SIO_REG_ENABLE);
1373 if (!(val & 0x01)) {
1374 pr_warn("Forcibly enabling EC access. Data may be unusable.\n");
1375 superio_outb(sioaddr, SIO_REG_ENABLE, val | 0x01);
1376 }
1377
1378 superio_exit(sioaddr);
1379 pr_info("Found %s or compatible chip at %#x:%#x\n",
1380 nct6683_chip_names[sio_data->kind], sioaddr, addr);
1381 sio_data->sioreg = sioaddr;
1382
1383 return addr;
1384
1385 fail:
1386 superio_exit(sioaddr);
1387 return -ENODEV;
1388 }
1389
1390 /*
1391 * when Super-I/O functions move to a separate file, the Super-I/O
1392 * bus will manage the lifetime of the device and this module will only keep
1393 * track of the nct6683 driver. But since we use platform_device_alloc(), we
1394 * must keep track of the device
1395 */
1396 static struct platform_device *pdev[2];
1397
1398 static int __init sensors_nct6683_init(void)
1399 {
1400 struct nct6683_sio_data sio_data;
1401 int sioaddr[2] = { 0x2e, 0x4e };
1402 struct resource res;
1403 bool found = false;
1404 int address;
1405 int i, err;
1406
1407 err = platform_driver_register(&nct6683_driver);
1408 if (err)
1409 return err;
1410
1411 /*
1412 * initialize sio_data->kind and sio_data->sioreg.
1413 *
1414 * when Super-I/O functions move to a separate file, the Super-I/O
1415 * driver will probe 0x2e and 0x4e and auto-detect the presence of a
1416 * nct6683 hardware monitor, and call probe()
1417 */
1418 for (i = 0; i < ARRAY_SIZE(pdev); i++) {
1419 address = nct6683_find(sioaddr[i], &sio_data);
1420 if (address <= 0)
1421 continue;
1422
1423 found = true;
1424
1425 pdev[i] = platform_device_alloc(DRVNAME, address);
1426 if (!pdev[i]) {
1427 err = -ENOMEM;
1428 goto exit_device_unregister;
1429 }
1430
1431 err = platform_device_add_data(pdev[i], &sio_data,
1432 sizeof(struct nct6683_sio_data));
1433 if (err)
1434 goto exit_device_put;
1435
1436 memset(&res, 0, sizeof(res));
1437 res.name = DRVNAME;
1438 res.start = address + IOREGION_OFFSET;
1439 res.end = address + IOREGION_OFFSET + IOREGION_LENGTH - 1;
1440 res.flags = IORESOURCE_IO;
1441
1442 err = acpi_check_resource_conflict(&res);
1443 if (err) {
1444 platform_device_put(pdev[i]);
1445 pdev[i] = NULL;
1446 continue;
1447 }
1448
1449 err = platform_device_add_resources(pdev[i], &res, 1);
1450 if (err)
1451 goto exit_device_put;
1452
1453 /* platform_device_add calls probe() */
1454 err = platform_device_add(pdev[i]);
1455 if (err)
1456 goto exit_device_put;
1457 }
1458 if (!found) {
1459 err = -ENODEV;
1460 goto exit_unregister;
1461 }
1462
1463 return 0;
1464
1465 exit_device_put:
1466 platform_device_put(pdev[i]);
1467 exit_device_unregister:
1468 while (--i >= 0) {
1469 if (pdev[i])
1470 platform_device_unregister(pdev[i]);
1471 }
1472 exit_unregister:
1473 platform_driver_unregister(&nct6683_driver);
1474 return err;
1475 }
1476
1477 static void __exit sensors_nct6683_exit(void)
1478 {
1479 int i;
1480
1481 for (i = 0; i < ARRAY_SIZE(pdev); i++) {
1482 if (pdev[i])
1483 platform_device_unregister(pdev[i]);
1484 }
1485 platform_driver_unregister(&nct6683_driver);
1486 }
1487
1488 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
1489 MODULE_DESCRIPTION("NCT6683D driver");
1490 MODULE_LICENSE("GPL");
1491
1492 module_init(sensors_nct6683_init);
1493 module_exit(sensors_nct6683_exit);
Linux with added FPC-III support