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
180 #define NCT6683_REG_BUILD_YEAR 0x604
181 #define NCT6683_REG_BUILD_MONTH 0x605
182 #define NCT6683_REG_BUILD_DAY 0x606
183 #define NCT6683_REG_SERIAL 0x607
184 #define NCT6683_REG_VERSION_HI 0x608
185 #define NCT6683_REG_VERSION_LO 0x609
187 #define NCT6683_REG_CR_CASEOPEN 0xe8
188 #define NCT6683_CR_CASEOPEN_MASK (1 << 7)
190 #define NCT6683_REG_CR_BEEP 0xe0
191 #define NCT6683_CR_BEEP_MASK (1 << 6)
193 static const char *const nct6683_mon_label[] = {
210 "Thermistor 5", /* 0x10 */
219 NULL, NULL, NULL, NULL, NULL, NULL, NULL,
220 "PECI 0.0", /* 0x20 */
232 NULL, NULL, NULL, NULL,
233 "PCH CPU", /* 0x30 */
259 NULL, NULL, NULL, NULL, NULL, NULL,
260 "Virtual 0", /* 0x50 */
268 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
269 "VCC", /* 0x60 voltage sensors */
294 #define NUM_MON_LABELS ARRAY_SIZE(nct6683_mon_label)
295 #define MON_VOLTAGE_START 0x60
297 /* ------------------------------------------------------- */
299 struct nct6683_data {
300 int addr; /* IO base of EC space */
301 int sioreg; /* SIO register */
305 struct device *hwmon_dev;
306 const struct attribute_group *groups[6];
308 int temp_num; /* number of temperature attributes */
309 u8 temp_index[NCT6683_NUM_REG_MON];
310 u8 temp_src[NCT6683_NUM_REG_MON];
312 u8 in_num; /* number of voltage attributes */
313 u8 in_index[NCT6683_NUM_REG_MON];
314 u8 in_src[NCT6683_NUM_REG_MON];
316 struct mutex update_lock; /* used to protect sensor updates */
317 bool valid; /* true if following fields are valid */
318 unsigned long last_updated; /* In jiffies */
320 /* Voltage attribute values */
321 u8 in[3][NCT6683_NUM_REG_MON]; /* [0]=in, [1]=in_max, [2]=in_min */
323 /* Temperature attribute values */
324 s16 temp_in[NCT6683_NUM_REG_MON];
325 s8 temp[4][NCT6683_NUM_REG_MON];/* [0]=min, [1]=max, [2]=hyst,
329 /* Fan attribute values */
330 unsigned int rpm[NCT6683_NUM_REG_FAN];
331 u16 fan_min[NCT6683_NUM_REG_FAN];
332 u8 fanin_cfg[NCT6683_NUM_REG_FAN];
333 u8 fanout_cfg[NCT6683_NUM_REG_FAN];
334 u16 have_fan; /* some fan inputs can be disabled */
337 u8 pwm[NCT6683_NUM_REG_PWM];
340 /* Remember extra register values over suspend/resume */
345 struct nct6683_sio_data {
350 struct sensor_device_template {
351 struct device_attribute dev_attr;
359 bool s2; /* true if both index and nr are used */
362 struct sensor_device_attr_u {
364 struct sensor_device_attribute a1;
365 struct sensor_device_attribute_2 a2;
370 #define __TEMPLATE_ATTR(_template, _mode, _show, _store) { \
371 .attr = {.name = _template, .mode = _mode }, \
376 #define SENSOR_DEVICE_TEMPLATE(_template, _mode, _show, _store, _index) \
377 { .dev_attr = __TEMPLATE_ATTR(_template, _mode, _show, _store), \
381 #define SENSOR_DEVICE_TEMPLATE_2(_template, _mode, _show, _store, \
383 { .dev_attr = __TEMPLATE_ATTR(_template, _mode, _show, _store), \
384 .u.s.index = _index, \
388 #define SENSOR_TEMPLATE(_name, _template, _mode, _show, _store, _index) \
389 static struct sensor_device_template sensor_dev_template_##_name \
390 = SENSOR_DEVICE_TEMPLATE(_template, _mode, _show, _store, \
393 #define SENSOR_TEMPLATE_2(_name, _template, _mode, _show, _store, \
395 static struct sensor_device_template sensor_dev_template_##_name \
396 = SENSOR_DEVICE_TEMPLATE_2(_template, _mode, _show, _store, \
399 struct sensor_template_group {
400 struct sensor_device_template **templates;
401 umode_t (*is_visible)(struct kobject *, struct attribute *, int);
405 static struct attribute_group *
406 nct6683_create_attr_group(struct device *dev,
407 const struct sensor_template_group *tg,
410 struct sensor_device_attribute_2 *a2;
411 struct sensor_device_attribute *a;
412 struct sensor_device_template **t;
413 struct sensor_device_attr_u *su;
414 struct attribute_group *group;
415 struct attribute **attrs;
419 return ERR_PTR(-EINVAL);
422 for (count = 0; *t; t++, count++)
426 return ERR_PTR(-EINVAL);
428 group = devm_kzalloc(dev, sizeof(*group), GFP_KERNEL);
430 return ERR_PTR(-ENOMEM);
432 attrs = devm_kcalloc(dev, repeat * count + 1, sizeof(*attrs),
435 return ERR_PTR(-ENOMEM);
437 su = devm_kzalloc(dev, array3_size(repeat, count, sizeof(*su)),
440 return ERR_PTR(-ENOMEM);
442 group->attrs = attrs;
443 group->is_visible = tg->is_visible;
445 for (i = 0; i < repeat; i++) {
448 snprintf(su->name, sizeof(su->name),
449 (*t)->dev_attr.attr.name, tg->base + i);
452 sysfs_attr_init(&a2->dev_attr.attr);
453 a2->dev_attr.attr.name = su->name;
454 a2->nr = (*t)->u.s.nr + i;
455 a2->index = (*t)->u.s.index;
456 a2->dev_attr.attr.mode =
457 (*t)->dev_attr.attr.mode;
458 a2->dev_attr.show = (*t)->dev_attr.show;
459 a2->dev_attr.store = (*t)->dev_attr.store;
460 *attrs = &a2->dev_attr.attr;
463 sysfs_attr_init(&a->dev_attr.attr);
464 a->dev_attr.attr.name = su->name;
465 a->index = (*t)->u.index + i;
466 a->dev_attr.attr.mode =
467 (*t)->dev_attr.attr.mode;
468 a->dev_attr.show = (*t)->dev_attr.show;
469 a->dev_attr.store = (*t)->dev_attr.store;
470 *attrs = &a->dev_attr.attr;
481 /* LSB is 16 mV, except for the following sources, where it is 32 mV */
482 #define MON_SRC_VCC 0x60
483 #define MON_SRC_VSB 0x61
484 #define MON_SRC_AVSB 0x62
485 #define MON_SRC_VBAT 0x64
487 static inline long in_from_reg(u16 reg, u8 src)
491 if (src == MON_SRC_VCC || src == MON_SRC_VSB || src == MON_SRC_AVSB ||
497 static u16 nct6683_read(struct nct6683_data *data, u16 reg)
501 outb_p(0xff, data->addr + EC_PAGE_REG); /* unlock */
502 outb_p(reg >> 8, data->addr + EC_PAGE_REG);
503 outb_p(reg & 0xff, data->addr + EC_INDEX_REG);
504 res = inb_p(data->addr + EC_DATA_REG);
508 static u16 nct6683_read16(struct nct6683_data *data, u16 reg)
510 return (nct6683_read(data, reg) << 8) | nct6683_read(data, reg + 1);
513 static void nct6683_write(struct nct6683_data *data, u16 reg, u16 value)
515 outb_p(0xff, data->addr + EC_PAGE_REG); /* unlock */
516 outb_p(reg >> 8, data->addr + EC_PAGE_REG);
517 outb_p(reg & 0xff, data->addr + EC_INDEX_REG);
518 outb_p(value & 0xff, data->addr + EC_DATA_REG);
521 static int get_in_reg(struct nct6683_data *data, int nr, int index)
523 int ch = data->in_index[index];
528 reg = NCT6683_REG_MON(ch);
531 if (data->customer_id != NCT6683_CUSTOMER_ID_INTEL)
532 reg = NCT6683_REG_MON_LOW(ch);
535 if (data->customer_id != NCT6683_CUSTOMER_ID_INTEL)
536 reg = NCT6683_REG_MON_HIGH(ch);
544 static int get_temp_reg(struct nct6683_data *data, int nr, int index)
546 int ch = data->temp_index[index];
549 switch (data->customer_id) {
550 case NCT6683_CUSTOMER_ID_INTEL:
554 reg = NCT6683_REG_INTEL_TEMP_MAX(ch);
557 reg = NCT6683_REG_INTEL_TEMP_CRIT(ch);
561 case NCT6683_CUSTOMER_ID_MITAC:
566 reg = NCT6683_REG_MON_LOW(ch);
569 reg = NCT6683_REG_TEMP_MAX(ch);
572 reg = NCT6683_REG_TEMP_HYST(ch);
575 reg = NCT6683_REG_MON_HIGH(ch);
583 static void nct6683_update_pwm(struct device *dev)
585 struct nct6683_data *data = dev_get_drvdata(dev);
588 for (i = 0; i < NCT6683_NUM_REG_PWM; i++) {
589 if (!(data->have_pwm & (1 << i)))
591 data->pwm[i] = nct6683_read(data, NCT6683_REG_PWM(i));
595 static struct nct6683_data *nct6683_update_device(struct device *dev)
597 struct nct6683_data *data = dev_get_drvdata(dev);
600 mutex_lock(&data->update_lock);
602 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
603 /* Measured voltages and limits */
604 for (i = 0; i < data->in_num; i++) {
605 for (j = 0; j < 3; j++) {
606 int reg = get_in_reg(data, j, i);
610 nct6683_read(data, reg);
614 /* Measured temperatures and limits */
615 for (i = 0; i < data->temp_num; i++) {
616 u8 ch = data->temp_index[i];
618 data->temp_in[i] = nct6683_read16(data,
619 NCT6683_REG_MON(ch));
620 for (j = 0; j < 4; j++) {
621 int reg = get_temp_reg(data, j, i);
625 nct6683_read(data, reg);
629 /* Measured fan speeds and limits */
630 for (i = 0; i < ARRAY_SIZE(data->rpm); i++) {
631 if (!(data->have_fan & (1 << i)))
634 data->rpm[i] = nct6683_read16(data,
635 NCT6683_REG_FAN_RPM(i));
636 data->fan_min[i] = nct6683_read16(data,
637 NCT6683_REG_FAN_MIN(i));
640 nct6683_update_pwm(dev);
642 data->last_updated = jiffies;
646 mutex_unlock(&data->update_lock);
651 * Sysfs callback functions
654 show_in_label(struct device *dev, struct device_attribute *attr, char *buf)
656 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
657 struct nct6683_data *data = nct6683_update_device(dev);
658 int nr = sattr->index;
660 return sprintf(buf, "%s\n", nct6683_mon_label[data->in_src[nr]]);
664 show_in_reg(struct device *dev, struct device_attribute *attr, char *buf)
666 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
667 struct nct6683_data *data = nct6683_update_device(dev);
668 int index = sattr->index;
671 return sprintf(buf, "%ld\n",
672 in_from_reg(data->in[index][nr], data->in_index[index]));
675 static umode_t nct6683_in_is_visible(struct kobject *kobj,
676 struct attribute *attr, int index)
678 struct device *dev = kobj_to_dev(kobj);
679 struct nct6683_data *data = dev_get_drvdata(dev);
680 int nr = index % 4; /* attribute */
683 * Voltage limits exist for Intel boards,
684 * but register location and encoding is unknown
686 if ((nr == 2 || nr == 3) &&
687 data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
693 SENSOR_TEMPLATE(in_label, "in%d_label", S_IRUGO, show_in_label, NULL, 0);
694 SENSOR_TEMPLATE_2(in_input, "in%d_input", S_IRUGO, show_in_reg, NULL, 0, 0);
695 SENSOR_TEMPLATE_2(in_min, "in%d_min", S_IRUGO, show_in_reg, NULL, 0, 1);
696 SENSOR_TEMPLATE_2(in_max, "in%d_max", S_IRUGO, show_in_reg, NULL, 0, 2);
698 static struct sensor_device_template *nct6683_attributes_in_template[] = {
699 &sensor_dev_template_in_label,
700 &sensor_dev_template_in_input,
701 &sensor_dev_template_in_min,
702 &sensor_dev_template_in_max,
706 static const struct sensor_template_group nct6683_in_template_group = {
707 .templates = nct6683_attributes_in_template,
708 .is_visible = nct6683_in_is_visible,
712 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
714 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
715 struct nct6683_data *data = nct6683_update_device(dev);
717 return sprintf(buf, "%d\n", data->rpm[sattr->index]);
721 show_fan_min(struct device *dev, struct device_attribute *attr, char *buf)
723 struct nct6683_data *data = nct6683_update_device(dev);
724 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
725 int nr = sattr->index;
727 return sprintf(buf, "%d\n", data->fan_min[nr]);
731 show_fan_pulses(struct device *dev, struct device_attribute *attr, char *buf)
733 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
734 struct nct6683_data *data = nct6683_update_device(dev);
736 return sprintf(buf, "%d\n",
737 ((data->fanin_cfg[sattr->index] >> 5) & 0x03) + 1);
740 static umode_t nct6683_fan_is_visible(struct kobject *kobj,
741 struct attribute *attr, int index)
743 struct device *dev = kobj_to_dev(kobj);
744 struct nct6683_data *data = dev_get_drvdata(dev);
745 int fan = index / 3; /* fan index */
746 int nr = index % 3; /* attribute index */
748 if (!(data->have_fan & (1 << fan)))
752 * Intel may have minimum fan speed limits,
753 * but register location and encoding are unknown.
755 if (nr == 2 && data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
761 SENSOR_TEMPLATE(fan_input, "fan%d_input", S_IRUGO, show_fan, NULL, 0);
762 SENSOR_TEMPLATE(fan_pulses, "fan%d_pulses", S_IRUGO, show_fan_pulses, NULL, 0);
763 SENSOR_TEMPLATE(fan_min, "fan%d_min", S_IRUGO, show_fan_min, NULL, 0);
766 * nct6683_fan_is_visible uses the index into the following array
767 * to determine if attributes should be created or not.
768 * Any change in order or content must be matched.
770 static struct sensor_device_template *nct6683_attributes_fan_template[] = {
771 &sensor_dev_template_fan_input,
772 &sensor_dev_template_fan_pulses,
773 &sensor_dev_template_fan_min,
777 static const struct sensor_template_group nct6683_fan_template_group = {
778 .templates = nct6683_attributes_fan_template,
779 .is_visible = nct6683_fan_is_visible,
784 show_temp_label(struct device *dev, struct device_attribute *attr, char *buf)
786 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
787 struct nct6683_data *data = nct6683_update_device(dev);
788 int nr = sattr->index;
790 return sprintf(buf, "%s\n", nct6683_mon_label[data->temp_src[nr]]);
794 show_temp8(struct device *dev, struct device_attribute *attr, char *buf)
796 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
797 struct nct6683_data *data = nct6683_update_device(dev);
798 int index = sattr->index;
801 return sprintf(buf, "%d\n", data->temp[index][nr] * 1000);
805 show_temp_hyst(struct device *dev, struct device_attribute *attr, char *buf)
807 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
808 struct nct6683_data *data = nct6683_update_device(dev);
809 int nr = sattr->index;
810 int temp = data->temp[1][nr] - data->temp[2][nr];
812 return sprintf(buf, "%d\n", temp * 1000);
816 show_temp16(struct device *dev, struct device_attribute *attr, char *buf)
818 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
819 struct nct6683_data *data = nct6683_update_device(dev);
820 int index = sattr->index;
822 return sprintf(buf, "%d\n", (data->temp_in[index] / 128) * 500);
826 * Temperature sensor type is determined by temperature source
827 * and can not be modified.
828 * 0x02..0x07: Thermal diode
829 * 0x08..0x18: Thermistor
830 * 0x20..0x2b: Intel PECI
831 * 0x42..0x49: AMD TSI
832 * Others are unspecified (not visible)
835 static int get_temp_type(u8 src)
837 if (src >= 0x02 && src <= 0x07)
838 return 3; /* thermal diode */
839 else if (src >= 0x08 && src <= 0x18)
840 return 4; /* thermistor */
841 else if (src >= 0x20 && src <= 0x2b)
843 else if (src >= 0x42 && src <= 0x49)
850 show_temp_type(struct device *dev, struct device_attribute *attr, char *buf)
852 struct nct6683_data *data = nct6683_update_device(dev);
853 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
854 int nr = sattr->index;
855 return sprintf(buf, "%d\n", get_temp_type(data->temp_src[nr]));
858 static umode_t nct6683_temp_is_visible(struct kobject *kobj,
859 struct attribute *attr, int index)
861 struct device *dev = kobj_to_dev(kobj);
862 struct nct6683_data *data = dev_get_drvdata(dev);
863 int temp = index / 7; /* temp index */
864 int nr = index % 7; /* attribute index */
867 * Intel does not have low temperature limits or temperature hysteresis
868 * registers, or at least register location and encoding is unknown.
870 if ((nr == 2 || nr == 4) &&
871 data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
874 if (nr == 6 && get_temp_type(data->temp_src[temp]) == 0)
880 SENSOR_TEMPLATE(temp_input, "temp%d_input", S_IRUGO, show_temp16, NULL, 0);
881 SENSOR_TEMPLATE(temp_label, "temp%d_label", S_IRUGO, show_temp_label, NULL, 0);
882 SENSOR_TEMPLATE_2(temp_min, "temp%d_min", S_IRUGO, show_temp8, NULL, 0, 0);
883 SENSOR_TEMPLATE_2(temp_max, "temp%d_max", S_IRUGO, show_temp8, NULL, 0, 1);
884 SENSOR_TEMPLATE(temp_max_hyst, "temp%d_max_hyst", S_IRUGO, show_temp_hyst, NULL,
886 SENSOR_TEMPLATE_2(temp_crit, "temp%d_crit", S_IRUGO, show_temp8, NULL, 0, 3);
887 SENSOR_TEMPLATE(temp_type, "temp%d_type", S_IRUGO, show_temp_type, NULL, 0);
890 * nct6683_temp_is_visible uses the index into the following array
891 * to determine if attributes should be created or not.
892 * Any change in order or content must be matched.
894 static struct sensor_device_template *nct6683_attributes_temp_template[] = {
895 &sensor_dev_template_temp_input,
896 &sensor_dev_template_temp_label,
897 &sensor_dev_template_temp_min, /* 2 */
898 &sensor_dev_template_temp_max, /* 3 */
899 &sensor_dev_template_temp_max_hyst, /* 4 */
900 &sensor_dev_template_temp_crit, /* 5 */
901 &sensor_dev_template_temp_type, /* 6 */
905 static const struct sensor_template_group nct6683_temp_template_group = {
906 .templates = nct6683_attributes_temp_template,
907 .is_visible = nct6683_temp_is_visible,
912 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
914 struct nct6683_data *data = nct6683_update_device(dev);
915 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
916 int index = sattr->index;
918 return sprintf(buf, "%d\n", data->pwm[index]);
922 store_pwm(struct device *dev, struct device_attribute *attr, const char *buf,
925 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
926 struct nct6683_data *data = dev_get_drvdata(dev);
927 int index = sattr->index;
930 if (kstrtoul(buf, 10, &val) || val > 255)
933 mutex_lock(&data->update_lock);
934 nct6683_write(data, NCT6683_REG_FAN_CFG_CTRL, NCT6683_FAN_CFG_REQ);
935 usleep_range(1000, 2000);
936 nct6683_write(data, NCT6683_REG_PWM_WRITE(index), val);
937 nct6683_write(data, NCT6683_REG_FAN_CFG_CTRL, NCT6683_FAN_CFG_DONE);
938 mutex_unlock(&data->update_lock);
943 SENSOR_TEMPLATE(pwm, "pwm%d", S_IRUGO, show_pwm, store_pwm, 0);
945 static umode_t nct6683_pwm_is_visible(struct kobject *kobj,
946 struct attribute *attr, int index)
948 struct device *dev = kobj_to_dev(kobj);
949 struct nct6683_data *data = dev_get_drvdata(dev);
950 int pwm = index; /* pwm index */
952 if (!(data->have_pwm & (1 << pwm)))
955 /* Only update pwm values for Mitac boards */
956 if (data->customer_id == NCT6683_CUSTOMER_ID_MITAC)
957 return attr->mode | S_IWUSR;
962 static struct sensor_device_template *nct6683_attributes_pwm_template[] = {
963 &sensor_dev_template_pwm,
967 static const struct sensor_template_group nct6683_pwm_template_group = {
968 .templates = nct6683_attributes_pwm_template,
969 .is_visible = nct6683_pwm_is_visible,
974 beep_enable_show(struct device *dev, struct device_attribute *attr, char *buf)
976 struct nct6683_data *data = dev_get_drvdata(dev);
980 mutex_lock(&data->update_lock);
982 ret = superio_enter(data->sioreg);
985 superio_select(data->sioreg, NCT6683_LD_HWM);
986 reg = superio_inb(data->sioreg, NCT6683_REG_CR_BEEP);
987 superio_exit(data->sioreg);
989 mutex_unlock(&data->update_lock);
991 return sprintf(buf, "%u\n", !!(reg & NCT6683_CR_BEEP_MASK));
994 mutex_unlock(&data->update_lock);
999 beep_enable_store(struct device *dev, struct device_attribute *attr,
1000 const char *buf, size_t count)
1002 struct nct6683_data *data = dev_get_drvdata(dev);
1007 if (kstrtoul(buf, 10, &val) || (val != 0 && val != 1))
1010 mutex_lock(&data->update_lock);
1012 ret = superio_enter(data->sioreg);
1018 superio_select(data->sioreg, NCT6683_LD_HWM);
1019 reg = superio_inb(data->sioreg, NCT6683_REG_CR_BEEP);
1021 reg |= NCT6683_CR_BEEP_MASK;
1023 reg &= ~NCT6683_CR_BEEP_MASK;
1024 superio_outb(data->sioreg, NCT6683_REG_CR_BEEP, reg);
1025 superio_exit(data->sioreg);
1027 mutex_unlock(&data->update_lock);
1031 /* Case open detection */
1034 intrusion0_alarm_show(struct device *dev, struct device_attribute *attr,
1037 struct nct6683_data *data = dev_get_drvdata(dev);
1041 mutex_lock(&data->update_lock);
1043 ret = superio_enter(data->sioreg);
1046 superio_select(data->sioreg, NCT6683_LD_ACPI);
1047 reg = superio_inb(data->sioreg, NCT6683_REG_CR_CASEOPEN);
1048 superio_exit(data->sioreg);
1050 mutex_unlock(&data->update_lock);
1052 return sprintf(buf, "%u\n", !(reg & NCT6683_CR_CASEOPEN_MASK));
1055 mutex_unlock(&data->update_lock);
1060 intrusion0_alarm_store(struct device *dev, struct device_attribute *attr,
1061 const char *buf, size_t count)
1063 struct nct6683_data *data = dev_get_drvdata(dev);
1068 if (kstrtoul(buf, 10, &val) || val != 0)
1071 mutex_lock(&data->update_lock);
1074 * Use CR registers to clear caseopen status.
1075 * Caseopen is activ low, clear by writing 1 into the register.
1078 ret = superio_enter(data->sioreg);
1084 superio_select(data->sioreg, NCT6683_LD_ACPI);
1085 reg = superio_inb(data->sioreg, NCT6683_REG_CR_CASEOPEN);
1086 reg |= NCT6683_CR_CASEOPEN_MASK;
1087 superio_outb(data->sioreg, NCT6683_REG_CR_CASEOPEN, reg);
1088 reg &= ~NCT6683_CR_CASEOPEN_MASK;
1089 superio_outb(data->sioreg, NCT6683_REG_CR_CASEOPEN, reg);
1090 superio_exit(data->sioreg);
1092 data->valid = false; /* Force cache refresh */
1094 mutex_unlock(&data->update_lock);
1098 static DEVICE_ATTR_RW(intrusion0_alarm);
1099 static DEVICE_ATTR_RW(beep_enable);
1101 static struct attribute *nct6683_attributes_other[] = {
1102 &dev_attr_intrusion0_alarm.attr,
1103 &dev_attr_beep_enable.attr,
1107 static const struct attribute_group nct6683_group_other = {
1108 .attrs = nct6683_attributes_other,
1111 /* Get the monitoring functions started */
1112 static inline void nct6683_init_device(struct nct6683_data *data)
1116 /* Start hardware monitoring if needed */
1117 tmp = nct6683_read(data, NCT6683_HWM_CFG);
1119 nct6683_write(data, NCT6683_HWM_CFG, tmp | 0x80);
1123 * There are a total of 24 fan inputs. Each can be configured as input
1124 * or as output. A maximum of 16 inputs and 8 outputs is configurable.
1127 nct6683_setup_fans(struct nct6683_data *data)
1132 for (i = 0; i < NCT6683_NUM_REG_FAN; i++) {
1133 reg = nct6683_read(data, NCT6683_REG_FANIN_CFG(i));
1135 data->have_fan |= 1 << i;
1136 data->fanin_cfg[i] = reg;
1138 for (i = 0; i < NCT6683_NUM_REG_PWM; i++) {
1139 reg = nct6683_read(data, NCT6683_REG_FANOUT_CFG(i));
1141 data->have_pwm |= 1 << i;
1142 data->fanout_cfg[i] = reg;
1147 * Translation from monitoring register to temperature and voltage attributes
1148 * ==========================================================================
1150 * There are a total of 32 monitoring registers. Each can be assigned to either
1151 * a temperature or voltage monitoring source.
1152 * NCT6683_REG_MON_CFG(x) defines assignment for each monitoring source.
1154 * Temperature and voltage attribute mapping is determined by walking through
1155 * the NCT6683_REG_MON_CFG registers. If the assigned source is
1156 * a temperature, temp_index[n] is set to the monitor register index, and
1157 * temp_src[n] is set to the temperature source. If the assigned source is
1158 * a voltage, the respective values are stored in in_index[] and in_src[],
1162 static void nct6683_setup_sensors(struct nct6683_data *data)
1169 for (i = 0; i < NCT6683_NUM_REG_MON; i++) {
1170 reg = nct6683_read(data, NCT6683_REG_MON_CFG(i)) & 0x7f;
1171 /* Ignore invalid assignments */
1172 if (reg >= NUM_MON_LABELS)
1174 /* Skip if disabled or reserved */
1175 if (nct6683_mon_label[reg] == NULL)
1177 if (reg < MON_VOLTAGE_START) {
1178 data->temp_index[data->temp_num] = i;
1179 data->temp_src[data->temp_num] = reg;
1182 data->in_index[data->in_num] = i;
1183 data->in_src[data->in_num] = reg;
1189 static int nct6683_probe(struct platform_device *pdev)
1191 struct device *dev = &pdev->dev;
1192 struct nct6683_sio_data *sio_data = dev->platform_data;
1193 struct attribute_group *group;
1194 struct nct6683_data *data;
1195 struct device *hwmon_dev;
1196 struct resource *res;
1200 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1201 if (!devm_request_region(dev, res->start, IOREGION_LENGTH, DRVNAME))
1204 data = devm_kzalloc(dev, sizeof(struct nct6683_data), GFP_KERNEL);
1208 data->kind = sio_data->kind;
1209 data->sioreg = sio_data->sioreg;
1210 data->addr = res->start;
1211 mutex_init(&data->update_lock);
1212 platform_set_drvdata(pdev, data);
1214 data->customer_id = nct6683_read16(data, NCT6683_REG_CUSTOMER_ID);
1216 /* By default only instantiate driver if the customer ID is known */
1217 switch (data->customer_id) {
1218 case NCT6683_CUSTOMER_ID_INTEL:
1220 case NCT6683_CUSTOMER_ID_MITAC:
1222 case NCT6683_CUSTOMER_ID_MSI:
1224 case NCT6683_CUSTOMER_ID_MSI2:
1226 case NCT6683_CUSTOMER_ID_ASROCK:
1228 case NCT6683_CUSTOMER_ID_ASROCK2:
1235 nct6683_init_device(data);
1236 nct6683_setup_fans(data);
1237 nct6683_setup_sensors(data);
1239 /* Register sysfs hooks */
1241 if (data->have_pwm) {
1242 group = nct6683_create_attr_group(dev,
1243 &nct6683_pwm_template_group,
1244 fls(data->have_pwm));
1246 return PTR_ERR(group);
1247 data->groups[groups++] = group;
1251 group = nct6683_create_attr_group(dev,
1252 &nct6683_in_template_group,
1255 return PTR_ERR(group);
1256 data->groups[groups++] = group;
1259 if (data->have_fan) {
1260 group = nct6683_create_attr_group(dev,
1261 &nct6683_fan_template_group,
1262 fls(data->have_fan));
1264 return PTR_ERR(group);
1265 data->groups[groups++] = group;
1268 if (data->temp_num) {
1269 group = nct6683_create_attr_group(dev,
1270 &nct6683_temp_template_group,
1273 return PTR_ERR(group);
1274 data->groups[groups++] = group;
1276 data->groups[groups++] = &nct6683_group_other;
1278 if (data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
1279 scnprintf(build, sizeof(build), "%02x/%02x/%02x",
1280 nct6683_read(data, NCT6683_REG_BUILD_MONTH),
1281 nct6683_read(data, NCT6683_REG_BUILD_DAY),
1282 nct6683_read(data, NCT6683_REG_BUILD_YEAR));
1284 scnprintf(build, sizeof(build), "%02d/%02d/%02d",
1285 nct6683_read(data, NCT6683_REG_BUILD_MONTH),
1286 nct6683_read(data, NCT6683_REG_BUILD_DAY),
1287 nct6683_read(data, NCT6683_REG_BUILD_YEAR));
1289 dev_info(dev, "%s EC firmware version %d.%d build %s\n",
1290 nct6683_chip_names[data->kind],
1291 nct6683_read(data, NCT6683_REG_VERSION_HI),
1292 nct6683_read(data, NCT6683_REG_VERSION_LO),
1295 hwmon_dev = devm_hwmon_device_register_with_groups(dev,
1296 nct6683_device_names[data->kind], data, data->groups);
1297 return PTR_ERR_OR_ZERO(hwmon_dev);
1301 static int nct6683_suspend(struct device *dev)
1303 struct nct6683_data *data = nct6683_update_device(dev);
1305 mutex_lock(&data->update_lock);
1306 data->hwm_cfg = nct6683_read(data, NCT6683_HWM_CFG);
1307 mutex_unlock(&data->update_lock);
1312 static int nct6683_resume(struct device *dev)
1314 struct nct6683_data *data = dev_get_drvdata(dev);
1316 mutex_lock(&data->update_lock);
1318 nct6683_write(data, NCT6683_HWM_CFG, data->hwm_cfg);
1320 /* Force re-reading all values */
1321 data->valid = false;
1322 mutex_unlock(&data->update_lock);
1327 static const struct dev_pm_ops nct6683_dev_pm_ops = {
1328 .suspend = nct6683_suspend,
1329 .resume = nct6683_resume,
1330 .freeze = nct6683_suspend,
1331 .restore = nct6683_resume,
1334 #define NCT6683_DEV_PM_OPS (&nct6683_dev_pm_ops)
1336 #define NCT6683_DEV_PM_OPS NULL
1337 #endif /* CONFIG_PM */
1339 static struct platform_driver nct6683_driver = {
1342 .pm = NCT6683_DEV_PM_OPS,
1344 .probe = nct6683_probe,
1347 static int __init nct6683_find(int sioaddr, struct nct6683_sio_data *sio_data)
1353 err = superio_enter(sioaddr);
1357 val = (superio_inb(sioaddr, SIO_REG_DEVID) << 8)
1358 | superio_inb(sioaddr, SIO_REG_DEVID + 1);
1360 switch (val & SIO_ID_MASK) {
1361 case SIO_NCT6683_ID:
1362 sio_data->kind = nct6683;
1364 case SIO_NCT6686_ID:
1365 sio_data->kind = nct6686;
1367 case SIO_NCT6687_ID:
1368 sio_data->kind = nct6687;
1372 pr_debug("unsupported chip ID: 0x%04x\n", val);
1376 /* We have a known chip, find the HWM I/O address */
1377 superio_select(sioaddr, NCT6683_LD_HWM);
1378 val = (superio_inb(sioaddr, SIO_REG_ADDR) << 8)
1379 | superio_inb(sioaddr, SIO_REG_ADDR + 1);
1380 addr = val & IOREGION_ALIGNMENT;
1382 pr_err("EC base I/O port unconfigured\n");
1386 /* Activate logical device if needed */
1387 val = superio_inb(sioaddr, SIO_REG_ENABLE);
1388 if (!(val & 0x01)) {
1389 pr_warn("Forcibly enabling EC access. Data may be unusable.\n");
1390 superio_outb(sioaddr, SIO_REG_ENABLE, val | 0x01);
1393 superio_exit(sioaddr);
1394 pr_info("Found %s or compatible chip at %#x:%#x\n",
1395 nct6683_chip_names[sio_data->kind], sioaddr, addr);
1396 sio_data->sioreg = sioaddr;
1401 superio_exit(sioaddr);
1406 * when Super-I/O functions move to a separate file, the Super-I/O
1407 * bus will manage the lifetime of the device and this module will only keep
1408 * track of the nct6683 driver. But since we use platform_device_alloc(), we
1409 * must keep track of the device
1411 static struct platform_device *pdev[2];
1413 static int __init sensors_nct6683_init(void)
1415 struct nct6683_sio_data sio_data;
1416 int sioaddr[2] = { 0x2e, 0x4e };
1417 struct resource res;
1422 err = platform_driver_register(&nct6683_driver);
1427 * initialize sio_data->kind and sio_data->sioreg.
1429 * when Super-I/O functions move to a separate file, the Super-I/O
1430 * driver will probe 0x2e and 0x4e and auto-detect the presence of a
1431 * nct6683 hardware monitor, and call probe()
1433 for (i = 0; i < ARRAY_SIZE(pdev); i++) {
1434 address = nct6683_find(sioaddr[i], &sio_data);
1440 pdev[i] = platform_device_alloc(DRVNAME, address);
1443 goto exit_device_unregister;
1446 err = platform_device_add_data(pdev[i], &sio_data,
1447 sizeof(struct nct6683_sio_data));
1449 goto exit_device_put;
1451 memset(&res, 0, sizeof(res));
1453 res.start = address + IOREGION_OFFSET;
1454 res.end = address + IOREGION_OFFSET + IOREGION_LENGTH - 1;
1455 res.flags = IORESOURCE_IO;
1457 err = acpi_check_resource_conflict(&res);
1459 platform_device_put(pdev[i]);
1464 err = platform_device_add_resources(pdev[i], &res, 1);
1466 goto exit_device_put;
1468 /* platform_device_add calls probe() */
1469 err = platform_device_add(pdev[i]);
1471 goto exit_device_put;
1475 goto exit_unregister;
1481 platform_device_put(pdev[i]);
1482 exit_device_unregister:
1485 platform_device_unregister(pdev[i]);
1488 platform_driver_unregister(&nct6683_driver);
1492 static void __exit sensors_nct6683_exit(void)
1496 for (i = 0; i < ARRAY_SIZE(pdev); i++) {
1498 platform_device_unregister(pdev[i]);
1500 platform_driver_unregister(&nct6683_driver);
1503 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
1504 MODULE_DESCRIPTION("NCT6683D driver");
1505 MODULE_LICENSE("GPL");
1507 module_init(sensors_nct6683_init);
1508 module_exit(sensors_nct6683_exit);