1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * nct6683 - Driver for the hardware monitoring functionality of
4 * Nuvoton NCT6683D/NCT6686D/NCT6687D eSIO
6 * Copyright (C) 2013 Guenter Roeck <linux@roeck-us.net>
8 * Derived from nct6775 driver
9 * Copyright (C) 2012, 2013 Guenter Roeck <linux@roeck-us.net>
11 * Supports the following chips:
13 * Chip #vin #fan #pwm #temp chip ID
14 * nct6683d 21(1) 16 8 32(1) 0xc730
15 * nct6686d 21(1) 16 8 32(1) 0xd440
16 * nct6687d 21(1) 16 8 32(1) 0xd590
19 * (1) Total number of vin and temp inputs is 32.
22 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24 #include <linux/acpi.h>
25 #include <linux/delay.h>
26 #include <linux/err.h>
27 #include <linux/init.h>
29 #include <linux/jiffies.h>
30 #include <linux/hwmon.h>
31 #include <linux/hwmon-sysfs.h>
32 #include <linux/module.h>
33 #include <linux/mutex.h>
34 #include <linux/platform_device.h>
35 #include <linux/slab.h>
37 enum kinds { nct6683, nct6686, nct6687 };
40 module_param(force, bool, 0);
41 MODULE_PARM_DESC(force, "Set to one to enable support for unknown vendors");
43 static const char * const nct6683_device_names[] = {
49 static const char * const nct6683_chip_names[] = {
55 #define DRVNAME "nct6683"
58 * Super-I/O constants and functions
61 #define NCT6683_LD_ACPI 0x0a
62 #define NCT6683_LD_HWM 0x0b
63 #define NCT6683_LD_VID 0x0d
65 #define SIO_REG_LDSEL 0x07 /* Logical device select */
66 #define SIO_REG_DEVID 0x20 /* Device ID (2 bytes) */
67 #define SIO_REG_ENABLE 0x30 /* Logical device enable */
68 #define SIO_REG_ADDR 0x60 /* Logical device address (2 bytes) */
70 #define SIO_NCT6681_ID 0xb270 /* for later */
71 #define SIO_NCT6683_ID 0xc730
72 #define SIO_NCT6686_ID 0xd440
73 #define SIO_NCT6687_ID 0xd590
74 #define SIO_ID_MASK 0xFFF0
77 superio_outb(int ioreg, int reg, int val)
84 superio_inb(int ioreg, int reg)
87 return inb(ioreg + 1);
91 superio_select(int ioreg, int ld)
93 outb(SIO_REG_LDSEL, ioreg);
98 superio_enter(int ioreg)
101 * Try to reserve <ioreg> and <ioreg + 1> for exclusive access.
103 if (!request_muxed_region(ioreg, 2, DRVNAME))
113 superio_exit(int ioreg)
117 outb(0x02, ioreg + 1);
118 release_region(ioreg, 2);
125 #define IOREGION_ALIGNMENT (~7)
126 #define IOREGION_OFFSET 4 /* Use EC port 1 */
127 #define IOREGION_LENGTH 4
129 #define EC_PAGE_REG 0
130 #define EC_INDEX_REG 1
131 #define EC_DATA_REG 2
132 #define EC_EVENT_REG 3
134 /* Common and NCT6683 specific data */
136 #define NCT6683_NUM_REG_MON 32
137 #define NCT6683_NUM_REG_FAN 16
138 #define NCT6683_NUM_REG_PWM 8
140 #define NCT6683_REG_MON(x) (0x100 + (x) * 2)
141 #define NCT6683_REG_FAN_RPM(x) (0x140 + (x) * 2)
142 #define NCT6683_REG_PWM(x) (0x160 + (x))
143 #define NCT6683_REG_PWM_WRITE(x) (0xa28 + (x))
145 #define NCT6683_REG_MON_STS(x) (0x174 + (x))
146 #define NCT6683_REG_IDLE(x) (0x178 + (x))
148 #define NCT6683_REG_FAN_STS(x) (0x17c + (x))
149 #define NCT6683_REG_FAN_ERRSTS 0x17e
150 #define NCT6683_REG_FAN_INITSTS 0x17f
152 #define NCT6683_HWM_CFG 0x180
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))
158 #define NCT6683_REG_INTEL_TEMP_MAX(x) (0x901 + (x) * 16)
159 #define NCT6683_REG_INTEL_TEMP_CRIT(x) (0x90d + (x) * 16)
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 */
166 #define NCT6683_REG_FAN_MIN(x) (0x3b8 + (x) * 2) /* 16 bit */
168 #define NCT6683_REG_FAN_CFG_CTRL 0xa01
169 #define NCT6683_FAN_CFG_REQ 0x80
170 #define NCT6683_FAN_CFG_DONE 0x40
172 #define NCT6683_REG_CUSTOMER_ID 0x602
173 #define NCT6683_CUSTOMER_ID_INTEL 0x805
174 #define NCT6683_CUSTOMER_ID_MITAC 0xa0e
175 #define NCT6683_CUSTOMER_ID_MSI 0x201
176 #define NCT6683_CUSTOMER_ID_MSI2 0x200
177 #define NCT6683_CUSTOMER_ID_ASROCK 0xe2c
178 #define NCT6683_CUSTOMER_ID_ASROCK2 0xe1b
179 #define NCT6683_CUSTOMER_ID_ASROCK3 0x1631
181 #define NCT6683_REG_BUILD_YEAR 0x604
182 #define NCT6683_REG_BUILD_MONTH 0x605
183 #define NCT6683_REG_BUILD_DAY 0x606
184 #define NCT6683_REG_SERIAL 0x607
185 #define NCT6683_REG_VERSION_HI 0x608
186 #define NCT6683_REG_VERSION_LO 0x609
188 #define NCT6683_REG_CR_CASEOPEN 0xe8
189 #define NCT6683_CR_CASEOPEN_MASK (1 << 7)
191 #define NCT6683_REG_CR_BEEP 0xe0
192 #define NCT6683_CR_BEEP_MASK (1 << 6)
194 static const char *const nct6683_mon_label[] = {
211 "Thermistor 5", /* 0x10 */
220 NULL, NULL, NULL, NULL, NULL, NULL, NULL,
221 "PECI 0.0", /* 0x20 */
233 NULL, NULL, NULL, NULL,
234 "PCH CPU", /* 0x30 */
260 NULL, NULL, NULL, NULL, NULL, NULL,
261 "Virtual 0", /* 0x50 */
269 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
270 "VCC", /* 0x60 voltage sensors */
295 #define NUM_MON_LABELS ARRAY_SIZE(nct6683_mon_label)
296 #define MON_VOLTAGE_START 0x60
298 /* ------------------------------------------------------- */
300 struct nct6683_data {
301 int addr; /* IO base of EC space */
302 int sioreg; /* SIO register */
306 struct device *hwmon_dev;
307 const struct attribute_group *groups[6];
309 int temp_num; /* number of temperature attributes */
310 u8 temp_index[NCT6683_NUM_REG_MON];
311 u8 temp_src[NCT6683_NUM_REG_MON];
313 u8 in_num; /* number of voltage attributes */
314 u8 in_index[NCT6683_NUM_REG_MON];
315 u8 in_src[NCT6683_NUM_REG_MON];
317 struct mutex update_lock; /* used to protect sensor updates */
318 bool valid; /* true if following fields are valid */
319 unsigned long last_updated; /* In jiffies */
321 /* Voltage attribute values */
322 u8 in[3][NCT6683_NUM_REG_MON]; /* [0]=in, [1]=in_max, [2]=in_min */
324 /* Temperature attribute values */
325 s16 temp_in[NCT6683_NUM_REG_MON];
326 s8 temp[4][NCT6683_NUM_REG_MON];/* [0]=min, [1]=max, [2]=hyst,
330 /* Fan attribute values */
331 unsigned int rpm[NCT6683_NUM_REG_FAN];
332 u16 fan_min[NCT6683_NUM_REG_FAN];
333 u8 fanin_cfg[NCT6683_NUM_REG_FAN];
334 u8 fanout_cfg[NCT6683_NUM_REG_FAN];
335 u16 have_fan; /* some fan inputs can be disabled */
338 u8 pwm[NCT6683_NUM_REG_PWM];
341 /* Remember extra register values over suspend/resume */
346 struct nct6683_sio_data {
351 struct sensor_device_template {
352 struct device_attribute dev_attr;
360 bool s2; /* true if both index and nr are used */
363 struct sensor_device_attr_u {
365 struct sensor_device_attribute a1;
366 struct sensor_device_attribute_2 a2;
371 #define __TEMPLATE_ATTR(_template, _mode, _show, _store) { \
372 .attr = {.name = _template, .mode = _mode }, \
377 #define SENSOR_DEVICE_TEMPLATE(_template, _mode, _show, _store, _index) \
378 { .dev_attr = __TEMPLATE_ATTR(_template, _mode, _show, _store), \
382 #define SENSOR_DEVICE_TEMPLATE_2(_template, _mode, _show, _store, \
384 { .dev_attr = __TEMPLATE_ATTR(_template, _mode, _show, _store), \
385 .u.s.index = _index, \
389 #define SENSOR_TEMPLATE(_name, _template, _mode, _show, _store, _index) \
390 static struct sensor_device_template sensor_dev_template_##_name \
391 = SENSOR_DEVICE_TEMPLATE(_template, _mode, _show, _store, \
394 #define SENSOR_TEMPLATE_2(_name, _template, _mode, _show, _store, \
396 static struct sensor_device_template sensor_dev_template_##_name \
397 = SENSOR_DEVICE_TEMPLATE_2(_template, _mode, _show, _store, \
400 struct sensor_template_group {
401 struct sensor_device_template **templates;
402 umode_t (*is_visible)(struct kobject *, struct attribute *, int);
406 static struct attribute_group *
407 nct6683_create_attr_group(struct device *dev,
408 const struct sensor_template_group *tg,
411 struct sensor_device_attribute_2 *a2;
412 struct sensor_device_attribute *a;
413 struct sensor_device_template **t;
414 struct sensor_device_attr_u *su;
415 struct attribute_group *group;
416 struct attribute **attrs;
420 return ERR_PTR(-EINVAL);
423 for (count = 0; *t; t++, count++)
427 return ERR_PTR(-EINVAL);
429 group = devm_kzalloc(dev, sizeof(*group), GFP_KERNEL);
431 return ERR_PTR(-ENOMEM);
433 attrs = devm_kcalloc(dev, repeat * count + 1, sizeof(*attrs),
436 return ERR_PTR(-ENOMEM);
438 su = devm_kzalloc(dev, array3_size(repeat, count, sizeof(*su)),
441 return ERR_PTR(-ENOMEM);
443 group->attrs = attrs;
444 group->is_visible = tg->is_visible;
446 for (i = 0; i < repeat; i++) {
449 snprintf(su->name, sizeof(su->name),
450 (*t)->dev_attr.attr.name, tg->base + i);
453 sysfs_attr_init(&a2->dev_attr.attr);
454 a2->dev_attr.attr.name = su->name;
455 a2->nr = (*t)->u.s.nr + i;
456 a2->index = (*t)->u.s.index;
457 a2->dev_attr.attr.mode =
458 (*t)->dev_attr.attr.mode;
459 a2->dev_attr.show = (*t)->dev_attr.show;
460 a2->dev_attr.store = (*t)->dev_attr.store;
461 *attrs = &a2->dev_attr.attr;
464 sysfs_attr_init(&a->dev_attr.attr);
465 a->dev_attr.attr.name = su->name;
466 a->index = (*t)->u.index + i;
467 a->dev_attr.attr.mode =
468 (*t)->dev_attr.attr.mode;
469 a->dev_attr.show = (*t)->dev_attr.show;
470 a->dev_attr.store = (*t)->dev_attr.store;
471 *attrs = &a->dev_attr.attr;
482 /* LSB is 16 mV, except for the following sources, where it is 32 mV */
483 #define MON_SRC_VCC 0x60
484 #define MON_SRC_VSB 0x61
485 #define MON_SRC_AVSB 0x62
486 #define MON_SRC_VBAT 0x64
488 static inline long in_from_reg(u16 reg, u8 src)
492 if (src == MON_SRC_VCC || src == MON_SRC_VSB || src == MON_SRC_AVSB ||
498 static u16 nct6683_read(struct nct6683_data *data, u16 reg)
502 outb_p(0xff, data->addr + EC_PAGE_REG); /* unlock */
503 outb_p(reg >> 8, data->addr + EC_PAGE_REG);
504 outb_p(reg & 0xff, data->addr + EC_INDEX_REG);
505 res = inb_p(data->addr + EC_DATA_REG);
509 static u16 nct6683_read16(struct nct6683_data *data, u16 reg)
511 return (nct6683_read(data, reg) << 8) | nct6683_read(data, reg + 1);
514 static void nct6683_write(struct nct6683_data *data, u16 reg, u16 value)
516 outb_p(0xff, data->addr + EC_PAGE_REG); /* unlock */
517 outb_p(reg >> 8, data->addr + EC_PAGE_REG);
518 outb_p(reg & 0xff, data->addr + EC_INDEX_REG);
519 outb_p(value & 0xff, data->addr + EC_DATA_REG);
522 static int get_in_reg(struct nct6683_data *data, int nr, int index)
524 int ch = data->in_index[index];
529 reg = NCT6683_REG_MON(ch);
532 if (data->customer_id != NCT6683_CUSTOMER_ID_INTEL)
533 reg = NCT6683_REG_MON_LOW(ch);
536 if (data->customer_id != NCT6683_CUSTOMER_ID_INTEL)
537 reg = NCT6683_REG_MON_HIGH(ch);
545 static int get_temp_reg(struct nct6683_data *data, int nr, int index)
547 int ch = data->temp_index[index];
550 switch (data->customer_id) {
551 case NCT6683_CUSTOMER_ID_INTEL:
555 reg = NCT6683_REG_INTEL_TEMP_MAX(ch);
558 reg = NCT6683_REG_INTEL_TEMP_CRIT(ch);
562 case NCT6683_CUSTOMER_ID_MITAC:
567 reg = NCT6683_REG_MON_LOW(ch);
570 reg = NCT6683_REG_TEMP_MAX(ch);
573 reg = NCT6683_REG_TEMP_HYST(ch);
576 reg = NCT6683_REG_MON_HIGH(ch);
584 static void nct6683_update_pwm(struct device *dev)
586 struct nct6683_data *data = dev_get_drvdata(dev);
589 for (i = 0; i < NCT6683_NUM_REG_PWM; i++) {
590 if (!(data->have_pwm & (1 << i)))
592 data->pwm[i] = nct6683_read(data, NCT6683_REG_PWM(i));
596 static struct nct6683_data *nct6683_update_device(struct device *dev)
598 struct nct6683_data *data = dev_get_drvdata(dev);
601 mutex_lock(&data->update_lock);
603 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
604 /* Measured voltages and limits */
605 for (i = 0; i < data->in_num; i++) {
606 for (j = 0; j < 3; j++) {
607 int reg = get_in_reg(data, j, i);
611 nct6683_read(data, reg);
615 /* Measured temperatures and limits */
616 for (i = 0; i < data->temp_num; i++) {
617 u8 ch = data->temp_index[i];
619 data->temp_in[i] = nct6683_read16(data,
620 NCT6683_REG_MON(ch));
621 for (j = 0; j < 4; j++) {
622 int reg = get_temp_reg(data, j, i);
626 nct6683_read(data, reg);
630 /* Measured fan speeds and limits */
631 for (i = 0; i < ARRAY_SIZE(data->rpm); i++) {
632 if (!(data->have_fan & (1 << i)))
635 data->rpm[i] = nct6683_read16(data,
636 NCT6683_REG_FAN_RPM(i));
637 data->fan_min[i] = nct6683_read16(data,
638 NCT6683_REG_FAN_MIN(i));
641 nct6683_update_pwm(dev);
643 data->last_updated = jiffies;
647 mutex_unlock(&data->update_lock);
652 * Sysfs callback functions
655 show_in_label(struct device *dev, struct device_attribute *attr, char *buf)
657 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
658 struct nct6683_data *data = nct6683_update_device(dev);
659 int nr = sattr->index;
661 return sprintf(buf, "%s\n", nct6683_mon_label[data->in_src[nr]]);
665 show_in_reg(struct device *dev, struct device_attribute *attr, char *buf)
667 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
668 struct nct6683_data *data = nct6683_update_device(dev);
669 int index = sattr->index;
672 return sprintf(buf, "%ld\n",
673 in_from_reg(data->in[index][nr], data->in_index[index]));
676 static umode_t nct6683_in_is_visible(struct kobject *kobj,
677 struct attribute *attr, int index)
679 struct device *dev = kobj_to_dev(kobj);
680 struct nct6683_data *data = dev_get_drvdata(dev);
681 int nr = index % 4; /* attribute */
684 * Voltage limits exist for Intel boards,
685 * but register location and encoding is unknown
687 if ((nr == 2 || nr == 3) &&
688 data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
694 SENSOR_TEMPLATE(in_label, "in%d_label", S_IRUGO, show_in_label, NULL, 0);
695 SENSOR_TEMPLATE_2(in_input, "in%d_input", S_IRUGO, show_in_reg, NULL, 0, 0);
696 SENSOR_TEMPLATE_2(in_min, "in%d_min", S_IRUGO, show_in_reg, NULL, 0, 1);
697 SENSOR_TEMPLATE_2(in_max, "in%d_max", S_IRUGO, show_in_reg, NULL, 0, 2);
699 static struct sensor_device_template *nct6683_attributes_in_template[] = {
700 &sensor_dev_template_in_label,
701 &sensor_dev_template_in_input,
702 &sensor_dev_template_in_min,
703 &sensor_dev_template_in_max,
707 static const struct sensor_template_group nct6683_in_template_group = {
708 .templates = nct6683_attributes_in_template,
709 .is_visible = nct6683_in_is_visible,
713 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
715 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
716 struct nct6683_data *data = nct6683_update_device(dev);
718 return sprintf(buf, "%d\n", data->rpm[sattr->index]);
722 show_fan_min(struct device *dev, struct device_attribute *attr, char *buf)
724 struct nct6683_data *data = nct6683_update_device(dev);
725 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
726 int nr = sattr->index;
728 return sprintf(buf, "%d\n", data->fan_min[nr]);
732 show_fan_pulses(struct device *dev, struct device_attribute *attr, char *buf)
734 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
735 struct nct6683_data *data = nct6683_update_device(dev);
737 return sprintf(buf, "%d\n",
738 ((data->fanin_cfg[sattr->index] >> 5) & 0x03) + 1);
741 static umode_t nct6683_fan_is_visible(struct kobject *kobj,
742 struct attribute *attr, int index)
744 struct device *dev = kobj_to_dev(kobj);
745 struct nct6683_data *data = dev_get_drvdata(dev);
746 int fan = index / 3; /* fan index */
747 int nr = index % 3; /* attribute index */
749 if (!(data->have_fan & (1 << fan)))
753 * Intel may have minimum fan speed limits,
754 * but register location and encoding are unknown.
756 if (nr == 2 && data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
762 SENSOR_TEMPLATE(fan_input, "fan%d_input", S_IRUGO, show_fan, NULL, 0);
763 SENSOR_TEMPLATE(fan_pulses, "fan%d_pulses", S_IRUGO, show_fan_pulses, NULL, 0);
764 SENSOR_TEMPLATE(fan_min, "fan%d_min", S_IRUGO, show_fan_min, NULL, 0);
767 * nct6683_fan_is_visible uses the index into the following array
768 * to determine if attributes should be created or not.
769 * Any change in order or content must be matched.
771 static struct sensor_device_template *nct6683_attributes_fan_template[] = {
772 &sensor_dev_template_fan_input,
773 &sensor_dev_template_fan_pulses,
774 &sensor_dev_template_fan_min,
778 static const struct sensor_template_group nct6683_fan_template_group = {
779 .templates = nct6683_attributes_fan_template,
780 .is_visible = nct6683_fan_is_visible,
785 show_temp_label(struct device *dev, struct device_attribute *attr, char *buf)
787 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
788 struct nct6683_data *data = nct6683_update_device(dev);
789 int nr = sattr->index;
791 return sprintf(buf, "%s\n", nct6683_mon_label[data->temp_src[nr]]);
795 show_temp8(struct device *dev, struct device_attribute *attr, char *buf)
797 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
798 struct nct6683_data *data = nct6683_update_device(dev);
799 int index = sattr->index;
802 return sprintf(buf, "%d\n", data->temp[index][nr] * 1000);
806 show_temp_hyst(struct device *dev, struct device_attribute *attr, char *buf)
808 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
809 struct nct6683_data *data = nct6683_update_device(dev);
810 int nr = sattr->index;
811 int temp = data->temp[1][nr] - data->temp[2][nr];
813 return sprintf(buf, "%d\n", temp * 1000);
817 show_temp16(struct device *dev, struct device_attribute *attr, char *buf)
819 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
820 struct nct6683_data *data = nct6683_update_device(dev);
821 int index = sattr->index;
823 return sprintf(buf, "%d\n", (data->temp_in[index] / 128) * 500);
827 * Temperature sensor type is determined by temperature source
828 * and can not be modified.
829 * 0x02..0x07: Thermal diode
830 * 0x08..0x18: Thermistor
831 * 0x20..0x2b: Intel PECI
832 * 0x42..0x49: AMD TSI
833 * Others are unspecified (not visible)
836 static int get_temp_type(u8 src)
838 if (src >= 0x02 && src <= 0x07)
839 return 3; /* thermal diode */
840 else if (src >= 0x08 && src <= 0x18)
841 return 4; /* thermistor */
842 else if (src >= 0x20 && src <= 0x2b)
844 else if (src >= 0x42 && src <= 0x49)
851 show_temp_type(struct device *dev, struct device_attribute *attr, char *buf)
853 struct nct6683_data *data = nct6683_update_device(dev);
854 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
855 int nr = sattr->index;
856 return sprintf(buf, "%d\n", get_temp_type(data->temp_src[nr]));
859 static umode_t nct6683_temp_is_visible(struct kobject *kobj,
860 struct attribute *attr, int index)
862 struct device *dev = kobj_to_dev(kobj);
863 struct nct6683_data *data = dev_get_drvdata(dev);
864 int temp = index / 7; /* temp index */
865 int nr = index % 7; /* attribute index */
868 * Intel does not have low temperature limits or temperature hysteresis
869 * registers, or at least register location and encoding is unknown.
871 if ((nr == 2 || nr == 4) &&
872 data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
875 if (nr == 6 && get_temp_type(data->temp_src[temp]) == 0)
881 SENSOR_TEMPLATE(temp_input, "temp%d_input", S_IRUGO, show_temp16, NULL, 0);
882 SENSOR_TEMPLATE(temp_label, "temp%d_label", S_IRUGO, show_temp_label, NULL, 0);
883 SENSOR_TEMPLATE_2(temp_min, "temp%d_min", S_IRUGO, show_temp8, NULL, 0, 0);
884 SENSOR_TEMPLATE_2(temp_max, "temp%d_max", S_IRUGO, show_temp8, NULL, 0, 1);
885 SENSOR_TEMPLATE(temp_max_hyst, "temp%d_max_hyst", S_IRUGO, show_temp_hyst, NULL,
887 SENSOR_TEMPLATE_2(temp_crit, "temp%d_crit", S_IRUGO, show_temp8, NULL, 0, 3);
888 SENSOR_TEMPLATE(temp_type, "temp%d_type", S_IRUGO, show_temp_type, NULL, 0);
891 * nct6683_temp_is_visible uses the index into the following array
892 * to determine if attributes should be created or not.
893 * Any change in order or content must be matched.
895 static struct sensor_device_template *nct6683_attributes_temp_template[] = {
896 &sensor_dev_template_temp_input,
897 &sensor_dev_template_temp_label,
898 &sensor_dev_template_temp_min, /* 2 */
899 &sensor_dev_template_temp_max, /* 3 */
900 &sensor_dev_template_temp_max_hyst, /* 4 */
901 &sensor_dev_template_temp_crit, /* 5 */
902 &sensor_dev_template_temp_type, /* 6 */
906 static const struct sensor_template_group nct6683_temp_template_group = {
907 .templates = nct6683_attributes_temp_template,
908 .is_visible = nct6683_temp_is_visible,
913 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
915 struct nct6683_data *data = nct6683_update_device(dev);
916 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
917 int index = sattr->index;
919 return sprintf(buf, "%d\n", data->pwm[index]);
923 store_pwm(struct device *dev, struct device_attribute *attr, const char *buf,
926 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
927 struct nct6683_data *data = dev_get_drvdata(dev);
928 int index = sattr->index;
931 if (kstrtoul(buf, 10, &val) || val > 255)
934 mutex_lock(&data->update_lock);
935 nct6683_write(data, NCT6683_REG_FAN_CFG_CTRL, NCT6683_FAN_CFG_REQ);
936 usleep_range(1000, 2000);
937 nct6683_write(data, NCT6683_REG_PWM_WRITE(index), val);
938 nct6683_write(data, NCT6683_REG_FAN_CFG_CTRL, NCT6683_FAN_CFG_DONE);
939 mutex_unlock(&data->update_lock);
944 SENSOR_TEMPLATE(pwm, "pwm%d", S_IRUGO, show_pwm, store_pwm, 0);
946 static umode_t nct6683_pwm_is_visible(struct kobject *kobj,
947 struct attribute *attr, int index)
949 struct device *dev = kobj_to_dev(kobj);
950 struct nct6683_data *data = dev_get_drvdata(dev);
951 int pwm = index; /* pwm index */
953 if (!(data->have_pwm & (1 << pwm)))
956 /* Only update pwm values for Mitac boards */
957 if (data->customer_id == NCT6683_CUSTOMER_ID_MITAC)
958 return attr->mode | S_IWUSR;
963 static struct sensor_device_template *nct6683_attributes_pwm_template[] = {
964 &sensor_dev_template_pwm,
968 static const struct sensor_template_group nct6683_pwm_template_group = {
969 .templates = nct6683_attributes_pwm_template,
970 .is_visible = nct6683_pwm_is_visible,
975 beep_enable_show(struct device *dev, struct device_attribute *attr, char *buf)
977 struct nct6683_data *data = dev_get_drvdata(dev);
981 mutex_lock(&data->update_lock);
983 ret = superio_enter(data->sioreg);
986 superio_select(data->sioreg, NCT6683_LD_HWM);
987 reg = superio_inb(data->sioreg, NCT6683_REG_CR_BEEP);
988 superio_exit(data->sioreg);
990 mutex_unlock(&data->update_lock);
992 return sprintf(buf, "%u\n", !!(reg & NCT6683_CR_BEEP_MASK));
995 mutex_unlock(&data->update_lock);
1000 beep_enable_store(struct device *dev, struct device_attribute *attr,
1001 const char *buf, size_t count)
1003 struct nct6683_data *data = dev_get_drvdata(dev);
1008 if (kstrtoul(buf, 10, &val) || (val != 0 && val != 1))
1011 mutex_lock(&data->update_lock);
1013 ret = superio_enter(data->sioreg);
1019 superio_select(data->sioreg, NCT6683_LD_HWM);
1020 reg = superio_inb(data->sioreg, NCT6683_REG_CR_BEEP);
1022 reg |= NCT6683_CR_BEEP_MASK;
1024 reg &= ~NCT6683_CR_BEEP_MASK;
1025 superio_outb(data->sioreg, NCT6683_REG_CR_BEEP, reg);
1026 superio_exit(data->sioreg);
1028 mutex_unlock(&data->update_lock);
1032 /* Case open detection */
1035 intrusion0_alarm_show(struct device *dev, struct device_attribute *attr,
1038 struct nct6683_data *data = dev_get_drvdata(dev);
1042 mutex_lock(&data->update_lock);
1044 ret = superio_enter(data->sioreg);
1047 superio_select(data->sioreg, NCT6683_LD_ACPI);
1048 reg = superio_inb(data->sioreg, NCT6683_REG_CR_CASEOPEN);
1049 superio_exit(data->sioreg);
1051 mutex_unlock(&data->update_lock);
1053 return sprintf(buf, "%u\n", !(reg & NCT6683_CR_CASEOPEN_MASK));
1056 mutex_unlock(&data->update_lock);
1061 intrusion0_alarm_store(struct device *dev, struct device_attribute *attr,
1062 const char *buf, size_t count)
1064 struct nct6683_data *data = dev_get_drvdata(dev);
1069 if (kstrtoul(buf, 10, &val) || val != 0)
1072 mutex_lock(&data->update_lock);
1075 * Use CR registers to clear caseopen status.
1076 * Caseopen is activ low, clear by writing 1 into the register.
1079 ret = superio_enter(data->sioreg);
1085 superio_select(data->sioreg, NCT6683_LD_ACPI);
1086 reg = superio_inb(data->sioreg, NCT6683_REG_CR_CASEOPEN);
1087 reg |= NCT6683_CR_CASEOPEN_MASK;
1088 superio_outb(data->sioreg, NCT6683_REG_CR_CASEOPEN, reg);
1089 reg &= ~NCT6683_CR_CASEOPEN_MASK;
1090 superio_outb(data->sioreg, NCT6683_REG_CR_CASEOPEN, reg);
1091 superio_exit(data->sioreg);
1093 data->valid = false; /* Force cache refresh */
1095 mutex_unlock(&data->update_lock);
1099 static DEVICE_ATTR_RW(intrusion0_alarm);
1100 static DEVICE_ATTR_RW(beep_enable);
1102 static struct attribute *nct6683_attributes_other[] = {
1103 &dev_attr_intrusion0_alarm.attr,
1104 &dev_attr_beep_enable.attr,
1108 static const struct attribute_group nct6683_group_other = {
1109 .attrs = nct6683_attributes_other,
1112 /* Get the monitoring functions started */
1113 static inline void nct6683_init_device(struct nct6683_data *data)
1117 /* Start hardware monitoring if needed */
1118 tmp = nct6683_read(data, NCT6683_HWM_CFG);
1120 nct6683_write(data, NCT6683_HWM_CFG, tmp | 0x80);
1124 * There are a total of 24 fan inputs. Each can be configured as input
1125 * or as output. A maximum of 16 inputs and 8 outputs is configurable.
1128 nct6683_setup_fans(struct nct6683_data *data)
1133 for (i = 0; i < NCT6683_NUM_REG_FAN; i++) {
1134 reg = nct6683_read(data, NCT6683_REG_FANIN_CFG(i));
1136 data->have_fan |= 1 << i;
1137 data->fanin_cfg[i] = reg;
1139 for (i = 0; i < NCT6683_NUM_REG_PWM; i++) {
1140 reg = nct6683_read(data, NCT6683_REG_FANOUT_CFG(i));
1142 data->have_pwm |= 1 << i;
1143 data->fanout_cfg[i] = reg;
1148 * Translation from monitoring register to temperature and voltage attributes
1149 * ==========================================================================
1151 * There are a total of 32 monitoring registers. Each can be assigned to either
1152 * a temperature or voltage monitoring source.
1153 * NCT6683_REG_MON_CFG(x) defines assignment for each monitoring source.
1155 * Temperature and voltage attribute mapping is determined by walking through
1156 * the NCT6683_REG_MON_CFG registers. If the assigned source is
1157 * a temperature, temp_index[n] is set to the monitor register index, and
1158 * temp_src[n] is set to the temperature source. If the assigned source is
1159 * a voltage, the respective values are stored in in_index[] and in_src[],
1163 static void nct6683_setup_sensors(struct nct6683_data *data)
1170 for (i = 0; i < NCT6683_NUM_REG_MON; i++) {
1171 reg = nct6683_read(data, NCT6683_REG_MON_CFG(i)) & 0x7f;
1172 /* Ignore invalid assignments */
1173 if (reg >= NUM_MON_LABELS)
1175 /* Skip if disabled or reserved */
1176 if (nct6683_mon_label[reg] == NULL)
1178 if (reg < MON_VOLTAGE_START) {
1179 data->temp_index[data->temp_num] = i;
1180 data->temp_src[data->temp_num] = reg;
1183 data->in_index[data->in_num] = i;
1184 data->in_src[data->in_num] = reg;
1190 static int nct6683_probe(struct platform_device *pdev)
1192 struct device *dev = &pdev->dev;
1193 struct nct6683_sio_data *sio_data = dev->platform_data;
1194 struct attribute_group *group;
1195 struct nct6683_data *data;
1196 struct device *hwmon_dev;
1197 struct resource *res;
1201 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1202 if (!devm_request_region(dev, res->start, IOREGION_LENGTH, DRVNAME))
1205 data = devm_kzalloc(dev, sizeof(struct nct6683_data), GFP_KERNEL);
1209 data->kind = sio_data->kind;
1210 data->sioreg = sio_data->sioreg;
1211 data->addr = res->start;
1212 mutex_init(&data->update_lock);
1213 platform_set_drvdata(pdev, data);
1215 data->customer_id = nct6683_read16(data, NCT6683_REG_CUSTOMER_ID);
1217 /* By default only instantiate driver if the customer ID is known */
1218 switch (data->customer_id) {
1219 case NCT6683_CUSTOMER_ID_INTEL:
1221 case NCT6683_CUSTOMER_ID_MITAC:
1223 case NCT6683_CUSTOMER_ID_MSI:
1225 case NCT6683_CUSTOMER_ID_MSI2:
1227 case NCT6683_CUSTOMER_ID_ASROCK:
1229 case NCT6683_CUSTOMER_ID_ASROCK2:
1231 case NCT6683_CUSTOMER_ID_ASROCK3:
1238 nct6683_init_device(data);
1239 nct6683_setup_fans(data);
1240 nct6683_setup_sensors(data);
1242 /* Register sysfs hooks */
1244 if (data->have_pwm) {
1245 group = nct6683_create_attr_group(dev,
1246 &nct6683_pwm_template_group,
1247 fls(data->have_pwm));
1249 return PTR_ERR(group);
1250 data->groups[groups++] = group;
1254 group = nct6683_create_attr_group(dev,
1255 &nct6683_in_template_group,
1258 return PTR_ERR(group);
1259 data->groups[groups++] = group;
1262 if (data->have_fan) {
1263 group = nct6683_create_attr_group(dev,
1264 &nct6683_fan_template_group,
1265 fls(data->have_fan));
1267 return PTR_ERR(group);
1268 data->groups[groups++] = group;
1271 if (data->temp_num) {
1272 group = nct6683_create_attr_group(dev,
1273 &nct6683_temp_template_group,
1276 return PTR_ERR(group);
1277 data->groups[groups++] = group;
1279 data->groups[groups++] = &nct6683_group_other;
1281 if (data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
1282 scnprintf(build, sizeof(build), "%02x/%02x/%02x",
1283 nct6683_read(data, NCT6683_REG_BUILD_MONTH),
1284 nct6683_read(data, NCT6683_REG_BUILD_DAY),
1285 nct6683_read(data, NCT6683_REG_BUILD_YEAR));
1287 scnprintf(build, sizeof(build), "%02d/%02d/%02d",
1288 nct6683_read(data, NCT6683_REG_BUILD_MONTH),
1289 nct6683_read(data, NCT6683_REG_BUILD_DAY),
1290 nct6683_read(data, NCT6683_REG_BUILD_YEAR));
1292 dev_info(dev, "%s EC firmware version %d.%d build %s\n",
1293 nct6683_chip_names[data->kind],
1294 nct6683_read(data, NCT6683_REG_VERSION_HI),
1295 nct6683_read(data, NCT6683_REG_VERSION_LO),
1298 hwmon_dev = devm_hwmon_device_register_with_groups(dev,
1299 nct6683_device_names[data->kind], data, data->groups);
1300 return PTR_ERR_OR_ZERO(hwmon_dev);
1304 static int nct6683_suspend(struct device *dev)
1306 struct nct6683_data *data = nct6683_update_device(dev);
1308 mutex_lock(&data->update_lock);
1309 data->hwm_cfg = nct6683_read(data, NCT6683_HWM_CFG);
1310 mutex_unlock(&data->update_lock);
1315 static int nct6683_resume(struct device *dev)
1317 struct nct6683_data *data = dev_get_drvdata(dev);
1319 mutex_lock(&data->update_lock);
1321 nct6683_write(data, NCT6683_HWM_CFG, data->hwm_cfg);
1323 /* Force re-reading all values */
1324 data->valid = false;
1325 mutex_unlock(&data->update_lock);
1330 static const struct dev_pm_ops nct6683_dev_pm_ops = {
1331 .suspend = nct6683_suspend,
1332 .resume = nct6683_resume,
1333 .freeze = nct6683_suspend,
1334 .restore = nct6683_resume,
1337 #define NCT6683_DEV_PM_OPS (&nct6683_dev_pm_ops)
1339 #define NCT6683_DEV_PM_OPS NULL
1340 #endif /* CONFIG_PM */
1342 static struct platform_driver nct6683_driver = {
1345 .pm = NCT6683_DEV_PM_OPS,
1347 .probe = nct6683_probe,
1350 static int __init nct6683_find(int sioaddr, struct nct6683_sio_data *sio_data)
1356 err = superio_enter(sioaddr);
1360 val = (superio_inb(sioaddr, SIO_REG_DEVID) << 8)
1361 | superio_inb(sioaddr, SIO_REG_DEVID + 1);
1363 switch (val & SIO_ID_MASK) {
1364 case SIO_NCT6683_ID:
1365 sio_data->kind = nct6683;
1367 case SIO_NCT6686_ID:
1368 sio_data->kind = nct6686;
1370 case SIO_NCT6687_ID:
1371 sio_data->kind = nct6687;
1375 pr_debug("unsupported chip ID: 0x%04x\n", val);
1379 /* We have a known chip, find the HWM I/O address */
1380 superio_select(sioaddr, NCT6683_LD_HWM);
1381 val = (superio_inb(sioaddr, SIO_REG_ADDR) << 8)
1382 | superio_inb(sioaddr, SIO_REG_ADDR + 1);
1383 addr = val & IOREGION_ALIGNMENT;
1385 pr_err("EC base I/O port unconfigured\n");
1389 /* Activate logical device if needed */
1390 val = superio_inb(sioaddr, SIO_REG_ENABLE);
1391 if (!(val & 0x01)) {
1392 pr_warn("Forcibly enabling EC access. Data may be unusable.\n");
1393 superio_outb(sioaddr, SIO_REG_ENABLE, val | 0x01);
1396 superio_exit(sioaddr);
1397 pr_info("Found %s or compatible chip at %#x:%#x\n",
1398 nct6683_chip_names[sio_data->kind], sioaddr, addr);
1399 sio_data->sioreg = sioaddr;
1404 superio_exit(sioaddr);
1409 * when Super-I/O functions move to a separate file, the Super-I/O
1410 * bus will manage the lifetime of the device and this module will only keep
1411 * track of the nct6683 driver. But since we use platform_device_alloc(), we
1412 * must keep track of the device
1414 static struct platform_device *pdev[2];
1416 static int __init sensors_nct6683_init(void)
1418 struct nct6683_sio_data sio_data;
1419 int sioaddr[2] = { 0x2e, 0x4e };
1420 struct resource res;
1425 err = platform_driver_register(&nct6683_driver);
1430 * initialize sio_data->kind and sio_data->sioreg.
1432 * when Super-I/O functions move to a separate file, the Super-I/O
1433 * driver will probe 0x2e and 0x4e and auto-detect the presence of a
1434 * nct6683 hardware monitor, and call probe()
1436 for (i = 0; i < ARRAY_SIZE(pdev); i++) {
1437 address = nct6683_find(sioaddr[i], &sio_data);
1443 pdev[i] = platform_device_alloc(DRVNAME, address);
1446 goto exit_device_unregister;
1449 err = platform_device_add_data(pdev[i], &sio_data,
1450 sizeof(struct nct6683_sio_data));
1452 goto exit_device_put;
1454 memset(&res, 0, sizeof(res));
1456 res.start = address + IOREGION_OFFSET;
1457 res.end = address + IOREGION_OFFSET + IOREGION_LENGTH - 1;
1458 res.flags = IORESOURCE_IO;
1460 err = acpi_check_resource_conflict(&res);
1462 platform_device_put(pdev[i]);
1467 err = platform_device_add_resources(pdev[i], &res, 1);
1469 goto exit_device_put;
1471 /* platform_device_add calls probe() */
1472 err = platform_device_add(pdev[i]);
1474 goto exit_device_put;
1478 goto exit_unregister;
1484 platform_device_put(pdev[i]);
1485 exit_device_unregister:
1488 platform_device_unregister(pdev[i]);
1491 platform_driver_unregister(&nct6683_driver);
1495 static void __exit sensors_nct6683_exit(void)
1499 for (i = 0; i < ARRAY_SIZE(pdev); i++) {
1501 platform_device_unregister(pdev[i]);
1503 platform_driver_unregister(&nct6683_driver);
1506 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
1507 MODULE_DESCRIPTION("NCT6683D driver");
1508 MODULE_LICENSE("GPL");
1510 module_init(sensors_nct6683_init);
1511 module_exit(sensors_nct6683_exit);