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authorGuenter Roeck <linux@roeck-us.net>2014-04-06 11:57:20 -0400
committerGuenter Roeck <linux@roeck-us.net>2014-05-21 19:02:27 -0400
commit41082d66bfd6fafe001c0902bb4622d7aee6f128 (patch)
tree8982ce666a86e8f48ff95dba0e8bd612e44a7c62
parentc254ffdefc002b57f1e9eedddcb3569c0d80578f (diff)
hwmon: Driver for NCT6683D
Nuvoton NCT6683D is an eSIO with hardware monitoring capabilities. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat
-rw-r--r--Documentation/hwmon/nct668357
-rw-r--r--drivers/hwmon/Kconfig10
-rw-r--r--drivers/hwmon/Makefile1
-rw-r--r--drivers/hwmon/nct6683.c1455
4 files changed, 1523 insertions, 0 deletions
diff --git a/Documentation/hwmon/nct6683 b/Documentation/hwmon/nct6683
new file mode 100644
index 000000000000..c1301d4300cd
--- /dev/null
+++ b/Documentation/hwmon/nct6683
@@ -0,0 +1,57 @@
1Kernel driver nct6683
2=====================
3
4Supported chips:
5 * Nuvoton NCT6683D
6 Prefix: 'nct6683'
7 Addresses scanned: ISA address retrieved from Super I/O registers
8 Datasheet: Available from Nuvoton upon request
9
10Authors:
11 Guenter Roeck <linux@roeck-us.net>
12
13Description
14-----------
15
16This driver implements support for the Nuvoton NCT6683D eSIO chip.
17
18The chips implement up to shared 32 temperature and voltage sensors.
19It supports up to 16 fan rotation sensors and up to 8 fan control engines.
20
21Temperatures are measured in degrees Celsius. Measurement resolution is
220.5 degrees C.
23
24Voltage sensors (also known as IN sensors) report their values in millivolts.
25
26Fan rotation speeds are reported in RPM (rotations per minute).
27
28Usage Note
29----------
30
31Limit register locations on Intel boards with EC firmware version 1.0
32build date 04/03/13 do not match the register locations in the Nuvoton
33datasheet. Nuvoton confirms that Intel uses a special firmware version
34with different register addresses. The specification describing the Intel
35firmware is held under NDA by Nuvoton and Intel and not available
36to the public.
37
38Some of the register locations can be reverse engineered; others are too
39well hidden. Given this, writing any values from the operating system is
40considered too risky with this firmware and has been disabled. All limits
41must all be written from the BIOS.
42
43The driver has only been tested with the Intel firmware, and by default
44only instantiates on Intel boards. To enable it on non-Intel boards,
45set the 'force' module parameter to 1.
46
47Tested Boards and Firmware Versions
48-----------------------------------
49
50The driver has been reported to work with the following boards and
51firmware versions.
52
53Board Firmware version
54---------------------------------------------------------------
55Intel DH87RL NCT6683D EC firmware version 1.0 build 04/03/13
56Intel DH87MC NCT6683D EC firmware version 1.0 build 04/03/13
57Intel DB85FL NCT6683D EC firmware version 1.0 build 04/03/13
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index bc196f49ec53..b7c0b830d9e4 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -1065,6 +1065,16 @@ config SENSORS_NTC_THERMISTOR
1065 This driver can also be built as a module. If so, the module 1065 This driver can also be built as a module. If so, the module
1066 will be called ntc-thermistor. 1066 will be called ntc-thermistor.
1067 1067
1068config SENSORS_NCT6683
1069 tristate "Nuvoton NCT6683D"
1070 depends on !PPC
1071 help
1072 If you say yes here you get support for the hardware monitoring
1073 functionality of the Nuvoton NCT6683D eSIO chip.
1074
1075 This driver can also be built as a module. If so, the module
1076 will be called nct6683.
1077
1068config SENSORS_NCT6775 1078config SENSORS_NCT6775
1069 tristate "Nuvoton NCT6775F and compatibles" 1079 tristate "Nuvoton NCT6775F and compatibles"
1070 depends on !PPC 1080 depends on !PPC
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index c48f9873ac73..11798ad7e801 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -114,6 +114,7 @@ obj-$(CONFIG_SENSORS_MAX6650) += max6650.o
114obj-$(CONFIG_SENSORS_MAX6697) += max6697.o 114obj-$(CONFIG_SENSORS_MAX6697) += max6697.o
115obj-$(CONFIG_SENSORS_MC13783_ADC)+= mc13783-adc.o 115obj-$(CONFIG_SENSORS_MC13783_ADC)+= mc13783-adc.o
116obj-$(CONFIG_SENSORS_MCP3021) += mcp3021.o 116obj-$(CONFIG_SENSORS_MCP3021) += mcp3021.o
117obj-$(CONFIG_SENSORS_NCT6683) += nct6683.o
117obj-$(CONFIG_SENSORS_NCT6775) += nct6775.o 118obj-$(CONFIG_SENSORS_NCT6775) += nct6775.o
118obj-$(CONFIG_SENSORS_NTC_THERMISTOR) += ntc_thermistor.o 119obj-$(CONFIG_SENSORS_NTC_THERMISTOR) += ntc_thermistor.o
119obj-$(CONFIG_SENSORS_PC87360) += pc87360.o 120obj-$(CONFIG_SENSORS_PC87360) += pc87360.o
diff --git a/drivers/hwmon/nct6683.c b/drivers/hwmon/nct6683.c
new file mode 100644
index 000000000000..540c81c52344
--- /dev/null
+++ b/drivers/hwmon/nct6683.c
@@ -0,0 +1,1455 @@
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/dmi.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 detection on non-Intel boards");
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
145#define NCT6683_REG_MON_STS(x) (0x174 + (x))
146#define NCT6683_REG_IDLE(x) (0x178 + (x))
147
148#define NCT6683_REG_FAN_STS(x) (0x17c + (x))
149#define NCT6683_REG_FAN_ERRSTS 0x17e
150#define NCT6683_REG_FAN_INITSTS 0x17f
151
152#define NCT6683_HWM_CFG 0x180
153
154#define NCT6683_REG_MON_CFG(x) (0x1a0 + (x))
155#define NCT6683_REG_FANIN_CFG(x) (0x1c0 + (x))
156#define NCT6683_REG_FANOUT_CFG(x) (0x1d0 + (x))
157
158#define NCT6683_REG_INTEL_TEMP_MAX(x) (0x901 + (x) * 16)
159#define NCT6683_REG_INTEL_TEMP_CRIT(x) (0x90d + (x) * 16)
160
161#define NCT6683_REG_TEMP_HYST(x) (0x330 + (x)) /* 8 bit */
162#define NCT6683_REG_TEMP_MAX(x) (0x350 + (x)) /* 8 bit */
163#define NCT6683_REG_MON_HIGH(x) (0x370 + (x) * 2) /* 8 bit */
164#define NCT6683_REG_MON_LOW(x) (0x371 + (x) * 2) /* 8 bit */
165
166#define NCT6683_REG_FAN_MIN(x) (0x3b8 + (x) * 2) /* 16 bit */
167
168#define NCT6683_REG_CUSTOMER_ID 0x602
169#define NCT6683_CUSTOMER_ID_INTEL 0x805
170
171#define NCT6683_REG_BUILD_YEAR 0x604
172#define NCT6683_REG_BUILD_MONTH 0x605
173#define NCT6683_REG_BUILD_DAY 0x606
174#define NCT6683_REG_SERIAL 0x607
175#define NCT6683_REG_VERSION_HI 0x608
176#define NCT6683_REG_VERSION_LO 0x609
177
178#define NCT6683_REG_CR_CASEOPEN 0xe8
179#define NCT6683_CR_CASEOPEN_MASK (1 << 7)
180
181#define NCT6683_REG_CR_BEEP 0xe0
182#define NCT6683_CR_BEEP_MASK (1 << 6)
183
184static const char *const nct6683_mon_label[] = {
185 NULL, /* disabled */
186 "Local",
187 "Diode 0 (curr)",
188 "Diode 1 (curr)",
189 "Diode 2 (curr)",
190 "Diode 0 (volt)",
191 "Diode 1 (volt)",
192 "Diode 2 (volt)",
193 "Thermistor 14",
194 "Thermistor 15",
195 "Thermistor 16",
196 "Thermistor 0",
197 "Thermistor 1",
198 "Thermistor 2",
199 "Thermistor 3",
200 "Thermistor 4",
201 "Thermistor 5", /* 0x10 */
202 "Thermistor 6",
203 "Thermistor 7",
204 "Thermistor 8",
205 "Thermistor 9",
206 "Thermistor 10",
207 "Thermistor 11",
208 "Thermistor 12",
209 "Thermistor 13",
210 NULL, NULL, NULL, NULL, NULL, NULL, NULL,
211 "PECI 0.0", /* 0x20 */
212 "PECI 1.0",
213 "PECI 2.0",
214 "PECI 3.0",
215 "PECI 0.1",
216 "PECI 1.1",
217 "PECI 2.1",
218 "PECI 3.1",
219 "PECI DIMM 0",
220 "PECI DIMM 1",
221 "PECI DIMM 2",
222 "PECI DIMM 3",
223 NULL, NULL, NULL, NULL,
224 "PCH CPU", /* 0x30 */
225 "PCH CHIP",
226 "PCH CHIP CPU MAX",
227 "PCH MCH",
228 "PCH DIMM 0",
229 "PCH DIMM 1",
230 "PCH DIMM 2",
231 "PCH DIMM 3",
232 "SMBus 0",
233 "SMBus 1",
234 "SMBus 2",
235 "SMBus 3",
236 "SMBus 4",
237 "SMBus 5",
238 "DIMM 0",
239 "DIMM 1",
240 "DIMM 2", /* 0x40 */
241 "DIMM 3",
242 "AMD TSI Addr 90h",
243 "AMD TSI Addr 92h",
244 "AMD TSI Addr 94h",
245 "AMD TSI Addr 96h",
246 "AMD TSI Addr 98h",
247 "AMD TSI Addr 9ah",
248 "AMD TSI Addr 9ch",
249 "AMD TSI Addr 9dh",
250 NULL, NULL, NULL, NULL, NULL, NULL,
251 "Virtual 0", /* 0x50 */
252 "Virtual 1",
253 "Virtual 2",
254 "Virtual 3",
255 "Virtual 4",
256 "Virtual 5",
257 "Virtual 6",
258 "Virtual 7",
259 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
260 "VCC", /* 0x60 voltage sensors */
261 "VSB",
262 "AVSB",
263 "VTT",
264 "VBAT",
265 "VREF",
266 "VIN0",
267 "VIN1",
268 "VIN2",
269 "VIN3",
270 "VIN4",
271 "VIN5",
272 "VIN6",
273 "VIN7",
274 "VIN8",
275 "VIN9",
276 "VIN10",
277 "VIN11",
278 "VIN12",
279 "VIN13",
280 "VIN14",
281 "VIN15",
282 "VIN16",
283};
284
285#define NUM_MON_LABELS ARRAY_SIZE(nct6683_mon_label)
286#define MON_VOLTAGE_START 0x60
287
288/* ------------------------------------------------------- */
289
290struct nct6683_data {
291 int addr; /* IO base of EC space */
292 int sioreg; /* SIO register */
293 enum kinds kind;
294 u16 customer_id;
295
296 struct device *hwmon_dev;
297 const struct attribute_group *groups[6];
298
299 int temp_num; /* number of temperature attributes */
300 u8 temp_index[NCT6683_NUM_REG_MON];
301 u8 temp_src[NCT6683_NUM_REG_MON];
302
303 u8 in_num; /* number of voltage attributes */
304 u8 in_index[NCT6683_NUM_REG_MON];
305 u8 in_src[NCT6683_NUM_REG_MON];
306
307 struct mutex update_lock; /* used to protect sensor updates */
308 bool valid; /* true if following fields are valid */
309 unsigned long last_updated; /* In jiffies */
310
311 /* Voltage attribute values */
312 u8 in[3][NCT6683_NUM_REG_MON]; /* [0]=in, [1]=in_max, [2]=in_min */
313
314 /* Temperature attribute values */
315 s16 temp_in[NCT6683_NUM_REG_MON];
316 s8 temp[4][NCT6683_NUM_REG_MON];/* [0]=min, [1]=max, [2]=hyst,
317 * [3]=crit
318 */
319
320 /* Fan attribute values */
321 unsigned int rpm[NCT6683_NUM_REG_FAN];
322 u16 fan_min[NCT6683_NUM_REG_FAN];
323 u8 fanin_cfg[NCT6683_NUM_REG_FAN];
324 u8 fanout_cfg[NCT6683_NUM_REG_FAN];
325 u16 have_fan; /* some fan inputs can be disabled */
326
327 u8 have_pwm;
328 u8 pwm[NCT6683_NUM_REG_PWM];
329
330#ifdef CONFIG_PM
331 /* Remember extra register values over suspend/resume */
332 u8 hwm_cfg;
333#endif
334};
335
336struct nct6683_sio_data {
337 int sioreg;
338 enum kinds kind;
339};
340
341struct sensor_device_template {
342 struct device_attribute dev_attr;
343 union {
344 struct {
345 u8 nr;
346 u8 index;
347 } s;
348 int index;
349 } u;
350 bool s2; /* true if both index and nr are used */
351};
352
353struct sensor_device_attr_u {
354 union {
355 struct sensor_device_attribute a1;
356 struct sensor_device_attribute_2 a2;
357 } u;
358 char name[32];
359};
360
361#define __TEMPLATE_ATTR(_template, _mode, _show, _store) { \
362 .attr = {.name = _template, .mode = _mode }, \
363 .show = _show, \
364 .store = _store, \
365}
366
367#define SENSOR_DEVICE_TEMPLATE(_template, _mode, _show, _store, _index) \
368 { .dev_attr = __TEMPLATE_ATTR(_template, _mode, _show, _store), \
369 .u.index = _index, \
370 .s2 = false }
371
372#define SENSOR_DEVICE_TEMPLATE_2(_template, _mode, _show, _store, \
373 _nr, _index) \
374 { .dev_attr = __TEMPLATE_ATTR(_template, _mode, _show, _store), \
375 .u.s.index = _index, \
376 .u.s.nr = _nr, \
377 .s2 = true }
378
379#define SENSOR_TEMPLATE(_name, _template, _mode, _show, _store, _index) \
380static struct sensor_device_template sensor_dev_template_##_name \
381 = SENSOR_DEVICE_TEMPLATE(_template, _mode, _show, _store, \
382 _index)
383
384#define SENSOR_TEMPLATE_2(_name, _template, _mode, _show, _store, \
385 _nr, _index) \
386static struct sensor_device_template sensor_dev_template_##_name \
387 = SENSOR_DEVICE_TEMPLATE_2(_template, _mode, _show, _store, \
388 _nr, _index)
389
390struct sensor_template_group {
391 struct sensor_device_template **templates;
392 umode_t (*is_visible)(struct kobject *, struct attribute *, int);
393 int base;
394};
395
396static struct attribute_group *
397nct6683_create_attr_group(struct device *dev, struct sensor_template_group *tg,
398 int repeat)
399{
400 struct sensor_device_attribute_2 *a2;
401 struct sensor_device_attribute *a;
402 struct sensor_device_template **t;
403 struct sensor_device_attr_u *su;
404 struct attribute_group *group;
405 struct attribute **attrs;
406 int i, j, count;
407
408 if (repeat <= 0)
409 return ERR_PTR(-EINVAL);
410
411 t = tg->templates;
412 for (count = 0; *t; t++, count++)
413 ;
414
415 if (count == 0)
416 return ERR_PTR(-EINVAL);
417
418 group = devm_kzalloc(dev, sizeof(*group), GFP_KERNEL);
419 if (group == NULL)
420 return ERR_PTR(-ENOMEM);
421
422 attrs = devm_kzalloc(dev, sizeof(*attrs) * (repeat * count + 1),
423 GFP_KERNEL);
424 if (attrs == NULL)
425 return ERR_PTR(-ENOMEM);
426
427 su = devm_kzalloc(dev, sizeof(*su) * repeat * count,
428 GFP_KERNEL);
429 if (su == NULL)
430 return ERR_PTR(-ENOMEM);
431
432 group->attrs = attrs;
433 group->is_visible = tg->is_visible;
434
435 for (i = 0; i < repeat; i++) {
436 t = tg->templates;
437 for (j = 0; *t != NULL; j++) {
438 snprintf(su->name, sizeof(su->name),
439 (*t)->dev_attr.attr.name, tg->base + i);
440 if ((*t)->s2) {
441 a2 = &su->u.a2;
442 a2->dev_attr.attr.name = su->name;
443 a2->nr = (*t)->u.s.nr + i;
444 a2->index = (*t)->u.s.index;
445 a2->dev_attr.attr.mode =
446 (*t)->dev_attr.attr.mode;
447 a2->dev_attr.show = (*t)->dev_attr.show;
448 a2->dev_attr.store = (*t)->dev_attr.store;
449 *attrs = &a2->dev_attr.attr;
450 } else {
451 a = &su->u.a1;
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
475static 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
485static 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
496static 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
507static u16 nct6683_read16(struct nct6683_data *data, u16 reg)
508{
509 return (nct6683_read(data, reg) << 8) | nct6683_read(data, reg + 1);
510}
511
512static 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
520static 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
543static 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 default:
561 switch (nr) {
562 default:
563 case 0: /* min */
564 reg = NCT6683_REG_MON_LOW(ch);
565 break;
566 case 1: /* max */
567 reg = NCT6683_REG_TEMP_MAX(ch);
568 break;
569 case 2: /* hyst */
570 reg = NCT6683_REG_TEMP_HYST(ch);
571 break;
572 case 3: /* crit */
573 reg = NCT6683_REG_MON_HIGH(ch);
574 break;
575 }
576 break;
577 }
578 return reg;
579}
580
581static void nct6683_update_pwm(struct device *dev)
582{
583 struct nct6683_data *data = dev_get_drvdata(dev);
584 int i;
585
586 for (i = 0; i < NCT6683_NUM_REG_PWM; i++) {
587 if (!(data->have_pwm & (1 << i)))
588 continue;
589 data->pwm[i] = nct6683_read(data, NCT6683_REG_PWM(i));
590 }
591}
592
593static struct nct6683_data *nct6683_update_device(struct device *dev)
594{
595 struct nct6683_data *data = dev_get_drvdata(dev);
596 int i, j;
597
598 mutex_lock(&data->update_lock);
599
600 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
601 /* Measured voltages and limits */
602 for (i = 0; i < data->in_num; i++) {
603 for (j = 0; j < 3; j++) {
604 int reg = get_in_reg(data, j, i);
605
606 if (reg >= 0)
607 data->in[j][i] =
608 nct6683_read(data, reg);
609 }
610 }
611
612 /* Measured temperatures and limits */
613 for (i = 0; i < data->temp_num; i++) {
614 u8 ch = data->temp_index[i];
615
616 data->temp_in[i] = nct6683_read16(data,
617 NCT6683_REG_MON(ch));
618 for (j = 0; j < 4; j++) {
619 int reg = get_temp_reg(data, j, i);
620
621 if (reg >= 0)
622 data->temp[j][i] =
623 nct6683_read(data, reg);
624 }
625 }
626
627 /* Measured fan speeds and limits */
628 for (i = 0; i < ARRAY_SIZE(data->rpm); i++) {
629 if (!(data->have_fan & (1 << i)))
630 continue;
631
632 data->rpm[i] = nct6683_read16(data,
633 NCT6683_REG_FAN_RPM(i));
634 data->fan_min[i] = nct6683_read16(data,
635 NCT6683_REG_FAN_MIN(i));
636 }
637
638 nct6683_update_pwm(dev);
639
640 data->last_updated = jiffies;
641 data->valid = true;
642 }
643
644 mutex_unlock(&data->update_lock);
645 return data;
646}
647
648/*
649 * Sysfs callback functions
650 */
651static ssize_t
652show_in_label(struct device *dev, struct device_attribute *attr, char *buf)
653{
654 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
655 struct nct6683_data *data = nct6683_update_device(dev);
656 int nr = sattr->index;
657
658 return sprintf(buf, "%s\n", nct6683_mon_label[data->in_src[nr]]);
659}
660
661static ssize_t
662show_in_reg(struct device *dev, struct device_attribute *attr, char *buf)
663{
664 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
665 struct nct6683_data *data = nct6683_update_device(dev);
666 int index = sattr->index;
667 int nr = sattr->nr;
668
669 return sprintf(buf, "%ld\n",
670 in_from_reg(data->in[index][nr], data->in_index[index]));
671}
672
673static umode_t nct6683_in_is_visible(struct kobject *kobj,
674 struct attribute *attr, int index)
675{
676 struct device *dev = container_of(kobj, struct device, kobj);
677 struct nct6683_data *data = dev_get_drvdata(dev);
678 int nr = index % 4; /* attribute */
679
680 /*
681 * Voltage limits exist for Intel boards,
682 * but register location and encoding is unknown
683 */
684 if ((nr == 2 || nr == 3) &&
685 data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
686 return 0;
687
688 return attr->mode;
689}
690
691SENSOR_TEMPLATE(in_label, "in%d_label", S_IRUGO, show_in_label, NULL, 0);
692SENSOR_TEMPLATE_2(in_input, "in%d_input", S_IRUGO, show_in_reg, NULL, 0, 0);
693SENSOR_TEMPLATE_2(in_min, "in%d_min", S_IRUGO, show_in_reg, NULL, 0, 1);
694SENSOR_TEMPLATE_2(in_max, "in%d_max", S_IRUGO, show_in_reg, NULL, 0, 2);
695
696static struct sensor_device_template *nct6683_attributes_in_template[] = {
697 &sensor_dev_template_in_label,
698 &sensor_dev_template_in_input,
699 &sensor_dev_template_in_min,
700 &sensor_dev_template_in_max,
701 NULL
702};
703
704static struct sensor_template_group nct6683_in_template_group = {
705 .templates = nct6683_attributes_in_template,
706 .is_visible = nct6683_in_is_visible,
707};
708
709static ssize_t
710show_fan(struct device *dev, struct device_attribute *attr, char *buf)
711{
712 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
713 struct nct6683_data *data = nct6683_update_device(dev);
714
715 return sprintf(buf, "%d\n", data->rpm[sattr->index]);
716}
717
718static ssize_t
719show_fan_min(struct device *dev, struct device_attribute *attr, char *buf)
720{
721 struct nct6683_data *data = nct6683_update_device(dev);
722 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
723 int nr = sattr->index;
724
725 return sprintf(buf, "%d\n", data->fan_min[nr]);
726}
727
728static ssize_t
729show_fan_pulses(struct device *dev, struct device_attribute *attr, char *buf)
730{
731 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
732 struct nct6683_data *data = nct6683_update_device(dev);
733
734 return sprintf(buf, "%d\n",
735 ((data->fanin_cfg[sattr->index] >> 5) & 0x03) + 1);
736}
737
738static umode_t nct6683_fan_is_visible(struct kobject *kobj,
739 struct attribute *attr, int index)
740{
741 struct device *dev = container_of(kobj, struct device, kobj);
742 struct nct6683_data *data = dev_get_drvdata(dev);
743 int fan = index / 3; /* fan index */
744 int nr = index % 3; /* attribute index */
745
746 if (!(data->have_fan & (1 << fan)))
747 return 0;
748
749 /*
750 * Intel may have minimum fan speed limits,
751 * but register location and encoding are unknown.
752 */
753 if (nr == 2 && data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
754 return 0;
755
756 return attr->mode;
757}
758
759SENSOR_TEMPLATE(fan_input, "fan%d_input", S_IRUGO, show_fan, NULL, 0);
760SENSOR_TEMPLATE(fan_pulses, "fan%d_pulses", S_IRUGO, show_fan_pulses, NULL, 0);
761SENSOR_TEMPLATE(fan_min, "fan%d_min", S_IRUGO, show_fan_min, NULL, 0);
762
763/*
764 * nct6683_fan_is_visible uses the index into the following array
765 * to determine if attributes should be created or not.
766 * Any change in order or content must be matched.
767 */
768static struct sensor_device_template *nct6683_attributes_fan_template[] = {
769 &sensor_dev_template_fan_input,
770 &sensor_dev_template_fan_pulses,
771 &sensor_dev_template_fan_min,
772 NULL
773};
774
775static struct sensor_template_group nct6683_fan_template_group = {
776 .templates = nct6683_attributes_fan_template,
777 .is_visible = nct6683_fan_is_visible,
778 .base = 1,
779};
780
781static ssize_t
782show_temp_label(struct device *dev, struct device_attribute *attr, char *buf)
783{
784 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
785 struct nct6683_data *data = nct6683_update_device(dev);
786 int nr = sattr->index;
787
788 return sprintf(buf, "%s\n", nct6683_mon_label[data->temp_src[nr]]);
789}
790
791static ssize_t
792show_temp8(struct device *dev, struct device_attribute *attr, char *buf)
793{
794 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
795 struct nct6683_data *data = nct6683_update_device(dev);
796 int index = sattr->index;
797 int nr = sattr->nr;
798
799 return sprintf(buf, "%d\n", data->temp[index][nr] * 1000);
800}
801
802static ssize_t
803show_temp_hyst(struct device *dev, struct device_attribute *attr, char *buf)
804{
805 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
806 struct nct6683_data *data = nct6683_update_device(dev);
807 int nr = sattr->index;
808 int temp = data->temp[1][nr] - data->temp[2][nr];
809
810 return sprintf(buf, "%d\n", temp * 1000);
811}
812
813static ssize_t
814show_temp16(struct device *dev, struct device_attribute *attr, char *buf)
815{
816 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
817 struct nct6683_data *data = nct6683_update_device(dev);
818 int index = sattr->index;
819
820 return sprintf(buf, "%d\n", (data->temp_in[index] / 128) * 500);
821}
822
823/*
824 * Temperature sensor type is determined by temperature source
825 * and can not be modified.
826 * 0x02..0x07: Thermal diode
827 * 0x08..0x18: Thermistor
828 * 0x20..0x2b: Intel PECI
829 * 0x42..0x49: AMD TSI
830 * Others are unspecified (not visible)
831 */
832
833static int get_temp_type(u8 src)
834{
835 if (src >= 0x02 && src <= 0x07)
836 return 3; /* thermal diode */
837 else if (src >= 0x08 && src <= 0x18)
838 return 4; /* thermistor */
839 else if (src >= 0x20 && src <= 0x2b)
840 return 6; /* PECI */
841 else if (src >= 0x42 && src <= 0x49)
842 return 5;
843
844 return 0;
845}
846
847static ssize_t
848show_temp_type(struct device *dev, struct device_attribute *attr, char *buf)
849{
850 struct nct6683_data *data = nct6683_update_device(dev);
851 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
852 int nr = sattr->index;
853 return sprintf(buf, "%d\n", get_temp_type(data->temp_src[nr]));
854}
855
856static umode_t nct6683_temp_is_visible(struct kobject *kobj,
857 struct attribute *attr, int index)
858{
859 struct device *dev = container_of(kobj, struct device, kobj);
860 struct nct6683_data *data = dev_get_drvdata(dev);
861 int temp = index / 7; /* temp index */
862 int nr = index % 7; /* attribute index */
863
864 /*
865 * Intel does not have low temperature limits or temperature hysteresis
866 * registers, or at least register location and encoding is unknown.
867 */
868 if ((nr == 2 || nr == 4) &&
869 data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
870 return 0;
871
872 if (nr == 6 && get_temp_type(data->temp_src[temp]) == 0)
873 return 0; /* type */
874
875 return attr->mode;
876}
877
878SENSOR_TEMPLATE(temp_input, "temp%d_input", S_IRUGO, show_temp16, NULL, 0);
879SENSOR_TEMPLATE(temp_label, "temp%d_label", S_IRUGO, show_temp_label, NULL, 0);
880SENSOR_TEMPLATE_2(temp_min, "temp%d_min", S_IRUGO, show_temp8, NULL, 0, 0);
881SENSOR_TEMPLATE_2(temp_max, "temp%d_max", S_IRUGO, show_temp8, NULL, 0, 1);
882SENSOR_TEMPLATE(temp_max_hyst, "temp%d_max_hyst", S_IRUGO, show_temp_hyst, NULL,
883 0);
884SENSOR_TEMPLATE_2(temp_crit, "temp%d_crit", S_IRUGO, show_temp8, NULL, 0, 3);
885SENSOR_TEMPLATE(temp_type, "temp%d_type", S_IRUGO, show_temp_type, NULL, 0);
886
887/*
888 * nct6683_temp_is_visible uses the index into the following array
889 * to determine if attributes should be created or not.
890 * Any change in order or content must be matched.
891 */
892static struct sensor_device_template *nct6683_attributes_temp_template[] = {
893 &sensor_dev_template_temp_input,
894 &sensor_dev_template_temp_label,
895 &sensor_dev_template_temp_min, /* 2 */
896 &sensor_dev_template_temp_max, /* 3 */
897 &sensor_dev_template_temp_max_hyst, /* 4 */
898 &sensor_dev_template_temp_crit, /* 5 */
899 &sensor_dev_template_temp_type, /* 6 */
900 NULL
901};
902
903static struct sensor_template_group nct6683_temp_template_group = {
904 .templates = nct6683_attributes_temp_template,
905 .is_visible = nct6683_temp_is_visible,
906 .base = 1,
907};
908
909static ssize_t
910show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
911{
912 struct nct6683_data *data = nct6683_update_device(dev);
913 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
914 int index = sattr->index;
915
916 return sprintf(buf, "%d\n", data->pwm[index]);
917}
918
919SENSOR_TEMPLATE(pwm, "pwm%d", S_IRUGO, show_pwm, NULL, 0);
920
921static umode_t nct6683_pwm_is_visible(struct kobject *kobj,
922 struct attribute *attr, int index)
923{
924 struct device *dev = container_of(kobj, struct device, kobj);
925 struct nct6683_data *data = dev_get_drvdata(dev);
926 int pwm = index; /* pwm index */
927
928 if (!(data->have_pwm & (1 << pwm)))
929 return 0;
930
931 return attr->mode;
932}
933
934static struct sensor_device_template *nct6683_attributes_pwm_template[] = {
935 &sensor_dev_template_pwm,
936 NULL
937};
938
939static struct sensor_template_group nct6683_pwm_template_group = {
940 .templates = nct6683_attributes_pwm_template,
941 .is_visible = nct6683_pwm_is_visible,
942 .base = 1,
943};
944
945static ssize_t
946show_global_beep(struct device *dev, struct device_attribute *attr, char *buf)
947{
948 struct nct6683_data *data = dev_get_drvdata(dev);
949 int ret;
950 u8 reg;
951
952 mutex_lock(&data->update_lock);
953
954 ret = superio_enter(data->sioreg);
955 if (ret)
956 goto error;
957 superio_select(data->sioreg, NCT6683_LD_HWM);
958 reg = superio_inb(data->sioreg, NCT6683_REG_CR_BEEP);
959 superio_exit(data->sioreg);
960
961 mutex_unlock(&data->update_lock);
962
963 return sprintf(buf, "%u\n", !!(reg & NCT6683_CR_BEEP_MASK));
964
965error:
966 mutex_unlock(&data->update_lock);
967 return ret;
968}
969
970static ssize_t
971store_global_beep(struct device *dev, struct device_attribute *attr,
972 const char *buf, size_t count)
973{
974 struct nct6683_data *data = dev_get_drvdata(dev);
975 unsigned long val;
976 u8 reg;
977 int ret;
978
979 if (kstrtoul(buf, 10, &val) || (val != 0 && val != 1))
980 return -EINVAL;
981
982 mutex_lock(&data->update_lock);
983
984 ret = superio_enter(data->sioreg);
985 if (ret) {
986 count = ret;
987 goto error;
988 }
989
990 superio_select(data->sioreg, NCT6683_LD_HWM);
991 reg = superio_inb(data->sioreg, NCT6683_REG_CR_BEEP);
992 if (val)
993 reg |= NCT6683_CR_BEEP_MASK;
994 else
995 reg &= ~NCT6683_CR_BEEP_MASK;
996 superio_outb(data->sioreg, NCT6683_REG_CR_BEEP, reg);
997 superio_exit(data->sioreg);
998error:
999 mutex_unlock(&data->update_lock);
1000 return count;
1001}
1002
1003/* Case open detection */
1004
1005static ssize_t
1006show_caseopen(struct device *dev, struct device_attribute *attr, char *buf)
1007{
1008 struct nct6683_data *data = dev_get_drvdata(dev);
1009 int ret;
1010 u8 reg;
1011
1012 mutex_lock(&data->update_lock);
1013
1014 ret = superio_enter(data->sioreg);
1015 if (ret)
1016 goto error;
1017 superio_select(data->sioreg, NCT6683_LD_ACPI);
1018 reg = superio_inb(data->sioreg, NCT6683_REG_CR_CASEOPEN);
1019 superio_exit(data->sioreg);
1020
1021 mutex_unlock(&data->update_lock);
1022
1023 return sprintf(buf, "%u\n", !(reg & NCT6683_CR_CASEOPEN_MASK));
1024
1025error:
1026 mutex_unlock(&data->update_lock);
1027 return ret;
1028}
1029
1030static ssize_t
1031clear_caseopen(struct device *dev, struct device_attribute *attr,
1032 const char *buf, size_t count)
1033{
1034 struct nct6683_data *data = dev_get_drvdata(dev);
1035 unsigned long val;
1036 u8 reg;
1037 int ret;
1038
1039 if (kstrtoul(buf, 10, &val) || val != 0)
1040 return -EINVAL;
1041
1042 mutex_lock(&data->update_lock);
1043
1044 /*
1045 * Use CR registers to clear caseopen status.
1046 * Caseopen is activ low, clear by writing 1 into the register.
1047 */
1048
1049 ret = superio_enter(data->sioreg);
1050 if (ret) {
1051 count = ret;
1052 goto error;
1053 }
1054
1055 superio_select(data->sioreg, NCT6683_LD_ACPI);
1056 reg = superio_inb(data->sioreg, NCT6683_REG_CR_CASEOPEN);
1057 reg |= NCT6683_CR_CASEOPEN_MASK;
1058 superio_outb(data->sioreg, NCT6683_REG_CR_CASEOPEN, reg);
1059 reg &= ~NCT6683_CR_CASEOPEN_MASK;
1060 superio_outb(data->sioreg, NCT6683_REG_CR_CASEOPEN, reg);
1061 superio_exit(data->sioreg);
1062
1063 data->valid = false; /* Force cache refresh */
1064error:
1065 mutex_unlock(&data->update_lock);
1066 return count;
1067}
1068
1069static DEVICE_ATTR(intrusion0_alarm, S_IWUSR | S_IRUGO, show_caseopen,
1070 clear_caseopen);
1071static DEVICE_ATTR(beep_enable, S_IWUSR | S_IRUGO, show_global_beep,
1072 store_global_beep);
1073
1074static struct attribute *nct6683_attributes_other[] = {
1075 &dev_attr_intrusion0_alarm.attr,
1076 &dev_attr_beep_enable.attr,
1077 NULL
1078};
1079
1080static const struct attribute_group nct6683_group_other = {
1081 .attrs = nct6683_attributes_other,
1082};
1083
1084/* Get the monitoring functions started */
1085static inline void nct6683_init_device(struct nct6683_data *data)
1086{
1087 u8 tmp;
1088
1089 /* Start hardware monitoring if needed */
1090 tmp = nct6683_read(data, NCT6683_HWM_CFG);
1091 if (!(tmp & 0x80))
1092 nct6683_write(data, NCT6683_HWM_CFG, tmp | 0x80);
1093}
1094
1095/*
1096 * There are a total of 24 fan inputs. Each can be configured as input
1097 * or as output. A maximum of 16 inputs and 8 outputs is configurable.
1098 */
1099static void
1100nct6683_setup_fans(struct nct6683_data *data)
1101{
1102 int i;
1103 u8 reg;
1104
1105 for (i = 0; i < NCT6683_NUM_REG_FAN; i++) {
1106 reg = nct6683_read(data, NCT6683_REG_FANIN_CFG(i));
1107 if (reg & 0x80)
1108 data->have_fan |= 1 << i;
1109 data->fanin_cfg[i] = reg;
1110 }
1111 for (i = 0; i < NCT6683_NUM_REG_PWM; i++) {
1112 reg = nct6683_read(data, NCT6683_REG_FANOUT_CFG(i));
1113 if (reg & 0x80)
1114 data->have_pwm |= 1 << i;
1115 data->fanout_cfg[i] = reg;
1116 }
1117}
1118
1119/*
1120 * Translation from monitoring register to temperature and voltage attributes
1121 * ==========================================================================
1122 *
1123 * There are a total of 32 monitoring registers. Each can be assigned to either
1124 * a temperature or voltage monitoring source.
1125 * NCT6683_REG_MON_CFG(x) defines assignment for each monitoring source.
1126 *
1127 * Temperature and voltage attribute mapping is determined by walking through
1128 * the NCT6683_REG_MON_CFG registers. If the assigned source is
1129 * a temperature, temp_index[n] is set to the monitor register index, and
1130 * temp_src[n] is set to the temperature source. If the assigned source is
1131 * a voltage, the respective values are stored in in_index[] and in_src[],
1132 * respectively.
1133 */
1134
1135static void nct6683_setup_sensors(struct nct6683_data *data)
1136{
1137 u8 reg;
1138 int i;
1139
1140 data->temp_num = 0;
1141 data->in_num = 0;
1142 for (i = 0; i < NCT6683_NUM_REG_MON; i++) {
1143 reg = nct6683_read(data, NCT6683_REG_MON_CFG(i)) & 0x7f;
1144 /* Ignore invalid assignments */
1145 if (reg >= NUM_MON_LABELS)
1146 continue;
1147 /* Skip if disabled or reserved */
1148 if (nct6683_mon_label[reg] == NULL)
1149 continue;
1150 if (reg < MON_VOLTAGE_START) {
1151 data->temp_index[data->temp_num] = i;
1152 data->temp_src[data->temp_num] = reg;
1153 data->temp_num++;
1154 } else {
1155 data->in_index[data->in_num] = i;
1156 data->in_src[data->in_num] = reg;
1157 data->in_num++;
1158 }
1159 }
1160}
1161
1162static int nct6683_probe(struct platform_device *pdev)
1163{
1164 struct device *dev = &pdev->dev;
1165 struct nct6683_sio_data *sio_data = dev->platform_data;
1166 struct attribute_group *group;
1167 struct nct6683_data *data;
1168 struct device *hwmon_dev;
1169 struct resource *res;
1170 int groups = 0;
1171
1172 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1173 if (!devm_request_region(dev, res->start, IOREGION_LENGTH, DRVNAME))
1174 return -EBUSY;
1175
1176 data = devm_kzalloc(dev, sizeof(struct nct6683_data), GFP_KERNEL);
1177 if (!data)
1178 return -ENOMEM;
1179
1180 data->kind = sio_data->kind;
1181 data->sioreg = sio_data->sioreg;
1182 data->addr = res->start;
1183 mutex_init(&data->update_lock);
1184 platform_set_drvdata(pdev, data);
1185
1186 data->customer_id = nct6683_read16(data, NCT6683_REG_CUSTOMER_ID);
1187
1188 nct6683_init_device(data);
1189 nct6683_setup_fans(data);
1190 nct6683_setup_sensors(data);
1191
1192 /* Register sysfs hooks */
1193
1194 if (data->have_pwm) {
1195 group = nct6683_create_attr_group(dev,
1196 &nct6683_pwm_template_group,
1197 fls(data->have_pwm));
1198 if (IS_ERR(group))
1199 return PTR_ERR(group);
1200 data->groups[groups++] = group;
1201 }
1202
1203 if (data->in_num) {
1204 group = nct6683_create_attr_group(dev,
1205 &nct6683_in_template_group,
1206 data->in_num);
1207 if (IS_ERR(group))
1208 return PTR_ERR(group);
1209 data->groups[groups++] = group;
1210 }
1211
1212 if (data->have_fan) {
1213 group = nct6683_create_attr_group(dev,
1214 &nct6683_fan_template_group,
1215 fls(data->have_fan));
1216 if (IS_ERR(group))
1217 return PTR_ERR(group);
1218 data->groups[groups++] = group;
1219 }
1220
1221 if (data->temp_num) {
1222 group = nct6683_create_attr_group(dev,
1223 &nct6683_temp_template_group,
1224 data->temp_num);
1225 if (IS_ERR(group))
1226 return PTR_ERR(group);
1227 data->groups[groups++] = group;
1228 }
1229 data->groups[groups++] = &nct6683_group_other;
1230
1231 dev_info(dev, "%s EC firmware version %d.%d build %02x/%02x/%02x\n",
1232 nct6683_chip_names[data->kind],
1233 nct6683_read(data, NCT6683_REG_VERSION_HI),
1234 nct6683_read(data, NCT6683_REG_VERSION_LO),
1235 nct6683_read(data, NCT6683_REG_BUILD_MONTH),
1236 nct6683_read(data, NCT6683_REG_BUILD_DAY),
1237 nct6683_read(data, NCT6683_REG_BUILD_YEAR));
1238
1239 hwmon_dev = devm_hwmon_device_register_with_groups(dev,
1240 nct6683_device_names[data->kind], data, data->groups);
1241 return PTR_ERR_OR_ZERO(hwmon_dev);
1242}
1243
1244#ifdef CONFIG_PM
1245static int nct6683_suspend(struct device *dev)
1246{
1247 struct nct6683_data *data = nct6683_update_device(dev);
1248
1249 mutex_lock(&data->update_lock);
1250 data->hwm_cfg = nct6683_read(data, NCT6683_HWM_CFG);
1251 mutex_unlock(&data->update_lock);
1252
1253 return 0;
1254}
1255
1256static int nct6683_resume(struct device *dev)
1257{
1258 struct nct6683_data *data = dev_get_drvdata(dev);
1259
1260 mutex_lock(&data->update_lock);
1261
1262 nct6683_write(data, NCT6683_HWM_CFG, data->hwm_cfg);
1263
1264 /* Force re-reading all values */
1265 data->valid = false;
1266 mutex_unlock(&data->update_lock);
1267
1268 return 0;
1269}
1270
1271static const struct dev_pm_ops nct6683_dev_pm_ops = {
1272 .suspend = nct6683_suspend,
1273 .resume = nct6683_resume,
1274 .freeze = nct6683_suspend,
1275 .restore = nct6683_resume,
1276};
1277
1278#define NCT6683_DEV_PM_OPS (&nct6683_dev_pm_ops)
1279#else
1280#define NCT6683_DEV_PM_OPS NULL
1281#endif /* CONFIG_PM */
1282
1283static struct platform_driver nct6683_driver = {
1284 .driver = {
1285 .owner = THIS_MODULE,
1286 .name = DRVNAME,
1287 .pm = NCT6683_DEV_PM_OPS,
1288 },
1289 .probe = nct6683_probe,
1290};
1291
1292static int __init nct6683_find(int sioaddr, struct nct6683_sio_data *sio_data)
1293{
1294 const char *board_vendor;
1295 int addr;
1296 u16 val;
1297 int err;
1298
1299 /*
1300 * Only run on Intel boards unless the 'force' module parameter is set
1301 */
1302 if (!force) {
1303 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1304 if (!board_vendor || strcmp(board_vendor, "Intel Corporation"))
1305 return -ENODEV;
1306 }
1307
1308 err = superio_enter(sioaddr);
1309 if (err)
1310 return err;
1311
1312 val = (superio_inb(sioaddr, SIO_REG_DEVID) << 8)
1313 | superio_inb(sioaddr, SIO_REG_DEVID + 1);
1314
1315 switch (val & SIO_ID_MASK) {
1316 case SIO_NCT6683_ID:
1317 sio_data->kind = nct6683;
1318 break;
1319 default:
1320 if (val != 0xffff)
1321 pr_debug("unsupported chip ID: 0x%04x\n", val);
1322 goto fail;
1323 }
1324
1325 /* We have a known chip, find the HWM I/O address */
1326 superio_select(sioaddr, NCT6683_LD_HWM);
1327 val = (superio_inb(sioaddr, SIO_REG_ADDR) << 8)
1328 | superio_inb(sioaddr, SIO_REG_ADDR + 1);
1329 addr = val & IOREGION_ALIGNMENT;
1330 if (addr == 0) {
1331 pr_err("EC base I/O port unconfigured\n");
1332 goto fail;
1333 }
1334
1335 /* Activate logical device if needed */
1336 val = superio_inb(sioaddr, SIO_REG_ENABLE);
1337 if (!(val & 0x01)) {
1338 pr_err("EC is disabled\n");
1339 goto fail;
1340 }
1341
1342 superio_exit(sioaddr);
1343 pr_info("Found %s or compatible chip at %#x:%#x\n",
1344 nct6683_chip_names[sio_data->kind], sioaddr, addr);
1345 sio_data->sioreg = sioaddr;
1346
1347 return addr;
1348
1349fail:
1350 superio_exit(sioaddr);
1351 return -ENODEV;
1352}
1353
1354/*
1355 * when Super-I/O functions move to a separate file, the Super-I/O
1356 * bus will manage the lifetime of the device and this module will only keep
1357 * track of the nct6683 driver. But since we use platform_device_alloc(), we
1358 * must keep track of the device
1359 */
1360static struct platform_device *pdev[2];
1361
1362static int __init sensors_nct6683_init(void)
1363{
1364 struct nct6683_sio_data sio_data;
1365 int sioaddr[2] = { 0x2e, 0x4e };
1366 struct resource res;
1367 bool found = false;
1368 int address;
1369 int i, err;
1370
1371 err = platform_driver_register(&nct6683_driver);
1372 if (err)
1373 return err;
1374
1375 /*
1376 * initialize sio_data->kind and sio_data->sioreg.
1377 *
1378 * when Super-I/O functions move to a separate file, the Super-I/O
1379 * driver will probe 0x2e and 0x4e and auto-detect the presence of a
1380 * nct6683 hardware monitor, and call probe()
1381 */
1382 for (i = 0; i < ARRAY_SIZE(pdev); i++) {
1383 address = nct6683_find(sioaddr[i], &sio_data);
1384 if (address <= 0)
1385 continue;
1386
1387 found = true;
1388
1389 pdev[i] = platform_device_alloc(DRVNAME, address);
1390 if (!pdev[i]) {
1391 err = -ENOMEM;
1392 goto exit_device_put;
1393 }
1394
1395 err = platform_device_add_data(pdev[i], &sio_data,
1396 sizeof(struct nct6683_sio_data));
1397 if (err)
1398 goto exit_device_put;
1399
1400 memset(&res, 0, sizeof(res));
1401 res.name = DRVNAME;
1402 res.start = address + IOREGION_OFFSET;
1403 res.end = address + IOREGION_OFFSET + IOREGION_LENGTH - 1;
1404 res.flags = IORESOURCE_IO;
1405
1406 err = acpi_check_resource_conflict(&res);
1407 if (err) {
1408 platform_device_put(pdev[i]);
1409 pdev[i] = NULL;
1410 continue;
1411 }
1412
1413 err = platform_device_add_resources(pdev[i], &res, 1);
1414 if (err)
1415 goto exit_device_put;
1416
1417 /* platform_device_add calls probe() */
1418 err = platform_device_add(pdev[i]);
1419 if (err)
1420 goto exit_device_put;
1421 }
1422 if (!found) {
1423 err = -ENODEV;
1424 goto exit_unregister;
1425 }
1426
1427 return 0;
1428
1429exit_device_put:
1430 for (i = 0; i < ARRAY_SIZE(pdev); i++) {
1431 if (pdev[i])
1432 platform_device_put(pdev[i]);
1433 }
1434exit_unregister:
1435 platform_driver_unregister(&nct6683_driver);
1436 return err;
1437}
1438
1439static void __exit sensors_nct6683_exit(void)
1440{
1441 int i;
1442
1443 for (i = 0; i < ARRAY_SIZE(pdev); i++) {
1444 if (pdev[i])
1445 platform_device_unregister(pdev[i]);
1446 }
1447 platform_driver_unregister(&nct6683_driver);
1448}
1449
1450MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
1451MODULE_DESCRIPTION("NCT6683D driver");
1452MODULE_LICENSE("GPL");
1453
1454module_init(sensors_nct6683_init);
1455module_exit(sensors_nct6683_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-27 18:24:53 -0400