1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * nct6683 - Driver for the hardware monitoring functionality of
4 * Nuvoton NCT6683D/NCT6687D eSIO
8 * Derived from nct6775 driver
11 * Supports the following chips:
13 * Chip #vin #fan #pwm #temp chip ID
14 * nct6683d 21(1) 16 8 32(1) 0xc730
15 * nct6687d 21(1) 16 8 32(1) 0xd590
18 * (1) Total number of vin and temp inputs is 32.
21 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
23 #include <linux/acpi.h>
24 #include <linux/delay.h>
25 #include <linux/err.h>
26 #include <linux/init.h>
28 #include <linux/jiffies.h>
29 #include <linux/hwmon.h>
30 #include <linux/hwmon-sysfs.h>
31 #include <linux/module.h>
32 #include <linux/mutex.h>
33 #include <linux/platform_device.h>
34 #include <linux/slab.h>
36 enum kinds { nct6683, nct6687 };
39 module_param(force, bool, 0);
40 MODULE_PARM_DESC(force, "Set to one to enable support for unknown vendors");
42 static const char * const nct6683_device_names[] = {
47 static const char * const nct6683_chip_names[] = {
52 #define DRVNAME "nct6683"
55 * Super-I/O constants and functions
58 #define NCT6683_LD_ACPI 0x0a
59 #define NCT6683_LD_HWM 0x0b
60 #define NCT6683_LD_VID 0x0d
62 #define SIO_REG_LDSEL 0x07 /* Logical device select */
63 #define SIO_REG_DEVID 0x20 /* Device ID (2 bytes) */
64 #define SIO_REG_ENABLE 0x30 /* Logical device enable */
65 #define SIO_REG_ADDR 0x60 /* Logical device address (2 bytes) */
67 #define SIO_NCT6681_ID 0xb270 /* for later */
68 #define SIO_NCT6683_ID 0xc730
69 #define SIO_NCT6687_ID 0xd590
70 #define SIO_ID_MASK 0xFFF0
73 superio_outb(int ioreg, int reg, int val)
80 superio_inb(int ioreg, int reg)
83 return inb(ioreg + 1);
87 superio_select(int ioreg, int ld)
89 outb(SIO_REG_LDSEL, ioreg);
94 superio_enter(int ioreg)
97 * Try to reserve <ioreg> and <ioreg + 1> for exclusive access.
99 if (!request_muxed_region(ioreg, 2, DRVNAME))
109 superio_exit(int ioreg)
113 outb(0x02, ioreg + 1);
114 release_region(ioreg, 2);
121 #define IOREGION_ALIGNMENT (~7)
122 #define IOREGION_OFFSET 4 /* Use EC port 1 */
123 #define IOREGION_LENGTH 4
125 #define EC_PAGE_REG 0
126 #define EC_INDEX_REG 1
127 #define EC_DATA_REG 2
128 #define EC_EVENT_REG 3
130 /* Common and NCT6683 specific data */
132 #define NCT6683_NUM_REG_MON 32
133 #define NCT6683_NUM_REG_FAN 16
134 #define NCT6683_NUM_REG_PWM 8
136 #define NCT6683_REG_MON(x) (0x100 + (x) * 2)
137 #define NCT6683_REG_FAN_RPM(x) (0x140 + (x) * 2)
138 #define NCT6683_REG_PWM(x) (0x160 + (x))
139 #define NCT6683_REG_PWM_WRITE(x) (0xa28 + (x))
141 #define NCT6683_REG_MON_STS(x) (0x174 + (x))
142 #define NCT6683_REG_IDLE(x) (0x178 + (x))
144 #define NCT6683_REG_FAN_STS(x) (0x17c + (x))
145 #define NCT6683_REG_FAN_ERRSTS 0x17e
146 #define NCT6683_REG_FAN_INITSTS 0x17f
148 #define NCT6683_HWM_CFG 0x180
150 #define NCT6683_REG_MON_CFG(x) (0x1a0 + (x))
151 #define NCT6683_REG_FANIN_CFG(x) (0x1c0 + (x))
152 #define NCT6683_REG_FANOUT_CFG(x) (0x1d0 + (x))
154 #define NCT6683_REG_INTEL_TEMP_MAX(x) (0x901 + (x) * 16)
155 #define NCT6683_REG_INTEL_TEMP_CRIT(x) (0x90d + (x) * 16)
157 #define NCT6683_REG_TEMP_HYST(x) (0x330 + (x)) /* 8 bit */
158 #define NCT6683_REG_TEMP_MAX(x) (0x350 + (x)) /* 8 bit */
159 #define NCT6683_REG_MON_HIGH(x) (0x370 + (x) * 2) /* 8 bit */
160 #define NCT6683_REG_MON_LOW(x) (0x371 + (x) * 2) /* 8 bit */
162 #define NCT6683_REG_FAN_MIN(x) (0x3b8 + (x) * 2) /* 16 bit */
164 #define NCT6683_REG_FAN_CFG_CTRL 0xa01
165 #define NCT6683_FAN_CFG_REQ 0x80
166 #define NCT6683_FAN_CFG_DONE 0x40
168 #define NCT6683_REG_CUSTOMER_ID 0x602
169 #define NCT6683_CUSTOMER_ID_INTEL 0x805
170 #define NCT6683_CUSTOMER_ID_MITAC 0xa0e
171 #define NCT6683_CUSTOMER_ID_MSI 0x201
173 #define NCT6683_REG_BUILD_YEAR 0x604
174 #define NCT6683_REG_BUILD_MONTH 0x605
175 #define NCT6683_REG_BUILD_DAY 0x606
176 #define NCT6683_REG_SERIAL 0x607
177 #define NCT6683_REG_VERSION_HI 0x608
178 #define NCT6683_REG_VERSION_LO 0x609
180 #define NCT6683_REG_CR_CASEOPEN 0xe8
181 #define NCT6683_CR_CASEOPEN_MASK (1 << 7)
183 #define NCT6683_REG_CR_BEEP 0xe0
184 #define NCT6683_CR_BEEP_MASK (1 << 6)
186 static const char *const nct6683_mon_label[] = {
203 "Thermistor 5", /* 0x10 */
212 NULL, NULL, NULL, NULL, NULL, NULL, NULL,
213 "PECI 0.0", /* 0x20 */
225 NULL, NULL, NULL, NULL,
226 "PCH CPU", /* 0x30 */
252 NULL, NULL, NULL, NULL, NULL, NULL,
253 "Virtual 0", /* 0x50 */
261 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
262 "VCC", /* 0x60 voltage sensors */
287 #define NUM_MON_LABELS ARRAY_SIZE(nct6683_mon_label)
288 #define MON_VOLTAGE_START 0x60
290 /* ------------------------------------------------------- */
292 struct nct6683_data {
293 int addr; /* IO base of EC space */
294 int sioreg; /* SIO register */
298 struct device *hwmon_dev;
299 const struct attribute_group *groups[6];
301 int temp_num; /* number of temperature attributes */
302 u8 temp_index[NCT6683_NUM_REG_MON];
303 u8 temp_src[NCT6683_NUM_REG_MON];
305 u8 in_num; /* number of voltage attributes */
306 u8 in_index[NCT6683_NUM_REG_MON];
307 u8 in_src[NCT6683_NUM_REG_MON];
309 struct mutex update_lock; /* used to protect sensor updates */
310 bool valid; /* true if following fields are valid */
311 unsigned long last_updated; /* In jiffies */
313 /* Voltage attribute values */
314 u8 in[3][NCT6683_NUM_REG_MON]; /* [0]=in, [1]=in_max, [2]=in_min */
316 /* Temperature attribute values */
317 s16 temp_in[NCT6683_NUM_REG_MON];
318 s8 temp[4][NCT6683_NUM_REG_MON];/* [0]=min, [1]=max, [2]=hyst,
322 /* Fan attribute values */
323 unsigned int rpm[NCT6683_NUM_REG_FAN];
324 u16 fan_min[NCT6683_NUM_REG_FAN];
325 u8 fanin_cfg[NCT6683_NUM_REG_FAN];
326 u8 fanout_cfg[NCT6683_NUM_REG_FAN];
327 u16 have_fan; /* some fan inputs can be disabled */
330 u8 pwm[NCT6683_NUM_REG_PWM];
333 /* Remember extra register values over suspend/resume */
338 struct nct6683_sio_data {
343 struct sensor_device_template {
344 struct device_attribute dev_attr;
352 bool s2; /* true if both index and nr are used */
355 struct sensor_device_attr_u {
357 struct sensor_device_attribute a1;
358 struct sensor_device_attribute_2 a2;
363 #define __TEMPLATE_ATTR(_template, _mode, _show, _store) { \
364 .attr = {.name = _template, .mode = _mode }, \
369 #define SENSOR_DEVICE_TEMPLATE(_template, _mode, _show, _store, _index) \
370 { .dev_attr = __TEMPLATE_ATTR(_template, _mode, _show, _store), \
374 #define SENSOR_DEVICE_TEMPLATE_2(_template, _mode, _show, _store, \
376 { .dev_attr = __TEMPLATE_ATTR(_template, _mode, _show, _store), \
377 .u.s.index = _index, \
381 #define SENSOR_TEMPLATE(_name, _template, _mode, _show, _store, _index) \
382 static struct sensor_device_template sensor_dev_template_##_name \
383 = SENSOR_DEVICE_TEMPLATE(_template, _mode, _show, _store, \
386 #define SENSOR_TEMPLATE_2(_name, _template, _mode, _show, _store, \
388 static struct sensor_device_template sensor_dev_template_##_name \
389 = SENSOR_DEVICE_TEMPLATE_2(_template, _mode, _show, _store, \
392 struct sensor_template_group {
393 struct sensor_device_template **templates;
394 umode_t (*is_visible)(struct kobject *, struct attribute *, int);
398 static struct attribute_group *
399 nct6683_create_attr_group(struct device *dev,
400 const struct sensor_template_group *tg,
403 struct sensor_device_attribute_2 *a2;
404 struct sensor_device_attribute *a;
405 struct sensor_device_template **t;
406 struct sensor_device_attr_u *su;
407 struct attribute_group *group;
408 struct attribute **attrs;
412 return ERR_PTR(-EINVAL);
415 for (count = 0; *t; t++, count++)
419 return ERR_PTR(-EINVAL);
421 group = devm_kzalloc(dev, sizeof(*group), GFP_KERNEL);
423 return ERR_PTR(-ENOMEM);
425 attrs = devm_kcalloc(dev, repeat * count + 1, sizeof(*attrs),
428 return ERR_PTR(-ENOMEM);
430 su = devm_kzalloc(dev, array3_size(repeat, count, sizeof(*su)),
433 return ERR_PTR(-ENOMEM);
435 group->attrs = attrs;
436 group->is_visible = tg->is_visible;
438 for (i = 0; i < repeat; i++) {
440 for (j = 0; *t != NULL; j++) {
441 snprintf(su->name, sizeof(su->name),
442 (*t)->dev_attr.attr.name, tg->base + i);
445 sysfs_attr_init(&a2->dev_attr.attr);
446 a2->dev_attr.attr.name = su->name;
447 a2->nr = (*t)->u.s.nr + i;
448 a2->index = (*t)->u.s.index;
449 a2->dev_attr.attr.mode =
450 (*t)->dev_attr.attr.mode;
451 a2->dev_attr.show = (*t)->dev_attr.show;
452 a2->dev_attr.store = (*t)->dev_attr.store;
453 *attrs = &a2->dev_attr.attr;
456 sysfs_attr_init(&a->dev_attr.attr);
457 a->dev_attr.attr.name = su->name;
458 a->index = (*t)->u.index + i;
459 a->dev_attr.attr.mode =
460 (*t)->dev_attr.attr.mode;
461 a->dev_attr.show = (*t)->dev_attr.show;
462 a->dev_attr.store = (*t)->dev_attr.store;
463 *attrs = &a->dev_attr.attr;
474 /* LSB is 16 mV, except for the following sources, where it is 32 mV */
475 #define MON_SRC_VCC 0x60
476 #define MON_SRC_VSB 0x61
477 #define MON_SRC_AVSB 0x62
478 #define MON_SRC_VBAT 0x64
480 static inline long in_from_reg(u16 reg, u8 src)
484 if (src == MON_SRC_VCC || src == MON_SRC_VSB || src == MON_SRC_AVSB ||
490 static inline u16 in_to_reg(u32 val, u8 src)
494 if (src == MON_SRC_VCC || src == MON_SRC_VSB || src == MON_SRC_AVSB ||
498 return clamp_val(DIV_ROUND_CLOSEST(val, scale), 0, 127);
501 static u16 nct6683_read(struct nct6683_data *data, u16 reg)
505 outb_p(0xff, data->addr + EC_PAGE_REG); /* unlock */
506 outb_p(reg >> 8, data->addr + EC_PAGE_REG);
507 outb_p(reg & 0xff, data->addr + EC_INDEX_REG);
508 res = inb_p(data->addr + EC_DATA_REG);
512 static u16 nct6683_read16(struct nct6683_data *data, u16 reg)
514 return (nct6683_read(data, reg) << 8) | nct6683_read(data, reg + 1);
517 static void nct6683_write(struct nct6683_data *data, u16 reg, u16 value)
519 outb_p(0xff, data->addr + EC_PAGE_REG); /* unlock */
520 outb_p(reg >> 8, data->addr + EC_PAGE_REG);
521 outb_p(reg & 0xff, data->addr + EC_INDEX_REG);
522 outb_p(value & 0xff, data->addr + EC_DATA_REG);
525 static int get_in_reg(struct nct6683_data *data, int nr, int index)
527 int ch = data->in_index[index];
532 reg = NCT6683_REG_MON(ch);
535 if (data->customer_id != NCT6683_CUSTOMER_ID_INTEL)
536 reg = NCT6683_REG_MON_LOW(ch);
539 if (data->customer_id != NCT6683_CUSTOMER_ID_INTEL)
540 reg = NCT6683_REG_MON_HIGH(ch);
548 static int get_temp_reg(struct nct6683_data *data, int nr, int index)
550 int ch = data->temp_index[index];
553 switch (data->customer_id) {
554 case NCT6683_CUSTOMER_ID_INTEL:
558 reg = NCT6683_REG_INTEL_TEMP_MAX(ch);
561 reg = NCT6683_REG_INTEL_TEMP_CRIT(ch);
565 case NCT6683_CUSTOMER_ID_MITAC:
570 reg = NCT6683_REG_MON_LOW(ch);
573 reg = NCT6683_REG_TEMP_MAX(ch);
576 reg = NCT6683_REG_TEMP_HYST(ch);
579 reg = NCT6683_REG_MON_HIGH(ch);
587 static void nct6683_update_pwm(struct device *dev)
589 struct nct6683_data *data = dev_get_drvdata(dev);
592 for (i = 0; i < NCT6683_NUM_REG_PWM; i++) {
593 if (!(data->have_pwm & (1 << i)))
595 data->pwm[i] = nct6683_read(data, NCT6683_REG_PWM(i));
599 static struct nct6683_data *nct6683_update_device(struct device *dev)
601 struct nct6683_data *data = dev_get_drvdata(dev);
604 mutex_lock(&data->update_lock);
606 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
607 /* Measured voltages and limits */
608 for (i = 0; i < data->in_num; i++) {
609 for (j = 0; j < 3; j++) {
610 int reg = get_in_reg(data, j, i);
614 nct6683_read(data, reg);
618 /* Measured temperatures and limits */
619 for (i = 0; i < data->temp_num; i++) {
620 u8 ch = data->temp_index[i];
622 data->temp_in[i] = nct6683_read16(data,
623 NCT6683_REG_MON(ch));
624 for (j = 0; j < 4; j++) {
625 int reg = get_temp_reg(data, j, i);
629 nct6683_read(data, reg);
633 /* Measured fan speeds and limits */
634 for (i = 0; i < ARRAY_SIZE(data->rpm); i++) {
635 if (!(data->have_fan & (1 << i)))
638 data->rpm[i] = nct6683_read16(data,
639 NCT6683_REG_FAN_RPM(i));
640 data->fan_min[i] = nct6683_read16(data,
641 NCT6683_REG_FAN_MIN(i));
644 nct6683_update_pwm(dev);
646 data->last_updated = jiffies;
650 mutex_unlock(&data->update_lock);
655 * Sysfs callback functions
658 show_in_label(struct device *dev, struct device_attribute *attr, char *buf)
660 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
661 struct nct6683_data *data = nct6683_update_device(dev);
662 int nr = sattr->index;
664 return sprintf(buf, "%s\n", nct6683_mon_label[data->in_src[nr]]);
668 show_in_reg(struct device *dev, struct device_attribute *attr, char *buf)
670 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
671 struct nct6683_data *data = nct6683_update_device(dev);
672 int index = sattr->index;
675 return sprintf(buf, "%ld\n",
676 in_from_reg(data->in[index][nr], data->in_index[index]));
679 static umode_t nct6683_in_is_visible(struct kobject *kobj,
680 struct attribute *attr, int index)
682 struct device *dev = kobj_to_dev(kobj);
683 struct nct6683_data *data = dev_get_drvdata(dev);
684 int nr = index % 4; /* attribute */
687 * Voltage limits exist for Intel boards,
688 * but register location and encoding is unknown
690 if ((nr == 2 || nr == 3) &&
691 data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
697 SENSOR_TEMPLATE(in_label, "in%d_label", S_IRUGO, show_in_label, NULL, 0);
698 SENSOR_TEMPLATE_2(in_input, "in%d_input", S_IRUGO, show_in_reg, NULL, 0, 0);
699 SENSOR_TEMPLATE_2(in_min, "in%d_min", S_IRUGO, show_in_reg, NULL, 0, 1);
700 SENSOR_TEMPLATE_2(in_max, "in%d_max", S_IRUGO, show_in_reg, NULL, 0, 2);
702 static struct sensor_device_template *nct6683_attributes_in_template[] = {
703 &sensor_dev_template_in_label,
704 &sensor_dev_template_in_input,
705 &sensor_dev_template_in_min,
706 &sensor_dev_template_in_max,
710 static const struct sensor_template_group nct6683_in_template_group = {
711 .templates = nct6683_attributes_in_template,
712 .is_visible = nct6683_in_is_visible,
716 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
718 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
719 struct nct6683_data *data = nct6683_update_device(dev);
721 return sprintf(buf, "%d\n", data->rpm[sattr->index]);
725 show_fan_min(struct device *dev, struct device_attribute *attr, char *buf)
727 struct nct6683_data *data = nct6683_update_device(dev);
728 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
729 int nr = sattr->index;
731 return sprintf(buf, "%d\n", data->fan_min[nr]);
735 show_fan_pulses(struct device *dev, struct device_attribute *attr, char *buf)
737 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
738 struct nct6683_data *data = nct6683_update_device(dev);
740 return sprintf(buf, "%d\n",
741 ((data->fanin_cfg[sattr->index] >> 5) & 0x03) + 1);
744 static umode_t nct6683_fan_is_visible(struct kobject *kobj,
745 struct attribute *attr, int index)
747 struct device *dev = kobj_to_dev(kobj);
748 struct nct6683_data *data = dev_get_drvdata(dev);
749 int fan = index / 3; /* fan index */
750 int nr = index % 3; /* attribute index */
752 if (!(data->have_fan & (1 << fan)))
756 * Intel may have minimum fan speed limits,
757 * but register location and encoding are unknown.
759 if (nr == 2 && data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
765 SENSOR_TEMPLATE(fan_input, "fan%d_input", S_IRUGO, show_fan, NULL, 0);
766 SENSOR_TEMPLATE(fan_pulses, "fan%d_pulses", S_IRUGO, show_fan_pulses, NULL, 0);
767 SENSOR_TEMPLATE(fan_min, "fan%d_min", S_IRUGO, show_fan_min, NULL, 0);
770 * nct6683_fan_is_visible uses the index into the following array
771 * to determine if attributes should be created or not.
772 * Any change in order or content must be matched.
774 static struct sensor_device_template *nct6683_attributes_fan_template[] = {
775 &sensor_dev_template_fan_input,
776 &sensor_dev_template_fan_pulses,
777 &sensor_dev_template_fan_min,
781 static const struct sensor_template_group nct6683_fan_template_group = {
782 .templates = nct6683_attributes_fan_template,
783 .is_visible = nct6683_fan_is_visible,
788 show_temp_label(struct device *dev, struct device_attribute *attr, char *buf)
790 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
791 struct nct6683_data *data = nct6683_update_device(dev);
792 int nr = sattr->index;
794 return sprintf(buf, "%s\n", nct6683_mon_label[data->temp_src[nr]]);
798 show_temp8(struct device *dev, struct device_attribute *attr, char *buf)
800 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
801 struct nct6683_data *data = nct6683_update_device(dev);
802 int index = sattr->index;
805 return sprintf(buf, "%d\n", data->temp[index][nr] * 1000);
809 show_temp_hyst(struct device *dev, struct device_attribute *attr, char *buf)
811 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
812 struct nct6683_data *data = nct6683_update_device(dev);
813 int nr = sattr->index;
814 int temp = data->temp[1][nr] - data->temp[2][nr];
816 return sprintf(buf, "%d\n", temp * 1000);
820 show_temp16(struct device *dev, struct device_attribute *attr, char *buf)
822 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
823 struct nct6683_data *data = nct6683_update_device(dev);
824 int index = sattr->index;
826 return sprintf(buf, "%d\n", (data->temp_in[index] / 128) * 500);
830 * Temperature sensor type is determined by temperature source
831 * and can not be modified.
832 * 0x02..0x07: Thermal diode
833 * 0x08..0x18: Thermistor
834 * 0x20..0x2b: Intel PECI
835 * 0x42..0x49: AMD TSI
836 * Others are unspecified (not visible)
839 static int get_temp_type(u8 src)
841 if (src >= 0x02 && src <= 0x07)
842 return 3; /* thermal diode */
843 else if (src >= 0x08 && src <= 0x18)
844 return 4; /* thermistor */
845 else if (src >= 0x20 && src <= 0x2b)
847 else if (src >= 0x42 && src <= 0x49)
854 show_temp_type(struct device *dev, struct device_attribute *attr, char *buf)
856 struct nct6683_data *data = nct6683_update_device(dev);
857 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
858 int nr = sattr->index;
859 return sprintf(buf, "%d\n", get_temp_type(data->temp_src[nr]));
862 static umode_t nct6683_temp_is_visible(struct kobject *kobj,
863 struct attribute *attr, int index)
865 struct device *dev = kobj_to_dev(kobj);
866 struct nct6683_data *data = dev_get_drvdata(dev);
867 int temp = index / 7; /* temp index */
868 int nr = index % 7; /* attribute index */
871 * Intel does not have low temperature limits or temperature hysteresis
872 * registers, or at least register location and encoding is unknown.
874 if ((nr == 2 || nr == 4) &&
875 data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
878 if (nr == 6 && get_temp_type(data->temp_src[temp]) == 0)
884 SENSOR_TEMPLATE(temp_input, "temp%d_input", S_IRUGO, show_temp16, NULL, 0);
885 SENSOR_TEMPLATE(temp_label, "temp%d_label", S_IRUGO, show_temp_label, NULL, 0);
886 SENSOR_TEMPLATE_2(temp_min, "temp%d_min", S_IRUGO, show_temp8, NULL, 0, 0);
887 SENSOR_TEMPLATE_2(temp_max, "temp%d_max", S_IRUGO, show_temp8, NULL, 0, 1);
888 SENSOR_TEMPLATE(temp_max_hyst, "temp%d_max_hyst", S_IRUGO, show_temp_hyst, NULL,
890 SENSOR_TEMPLATE_2(temp_crit, "temp%d_crit", S_IRUGO, show_temp8, NULL, 0, 3);
891 SENSOR_TEMPLATE(temp_type, "temp%d_type", S_IRUGO, show_temp_type, NULL, 0);
894 * nct6683_temp_is_visible uses the index into the following array
895 * to determine if attributes should be created or not.
896 * Any change in order or content must be matched.
898 static struct sensor_device_template *nct6683_attributes_temp_template[] = {
899 &sensor_dev_template_temp_input,
900 &sensor_dev_template_temp_label,
901 &sensor_dev_template_temp_min, /* 2 */
902 &sensor_dev_template_temp_max, /* 3 */
903 &sensor_dev_template_temp_max_hyst, /* 4 */
904 &sensor_dev_template_temp_crit, /* 5 */
905 &sensor_dev_template_temp_type, /* 6 */
909 static const struct sensor_template_group nct6683_temp_template_group = {
910 .templates = nct6683_attributes_temp_template,
911 .is_visible = nct6683_temp_is_visible,
916 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
918 struct nct6683_data *data = nct6683_update_device(dev);
919 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
920 int index = sattr->index;
922 return sprintf(buf, "%d\n", data->pwm[index]);
926 store_pwm(struct device *dev, struct device_attribute *attr, const char *buf,
929 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
930 struct nct6683_data *data = dev_get_drvdata(dev);
931 int index = sattr->index;
934 if (kstrtoul(buf, 10, &val) || val > 255)
937 mutex_lock(&data->update_lock);
938 nct6683_write(data, NCT6683_REG_FAN_CFG_CTRL, NCT6683_FAN_CFG_REQ);
939 usleep_range(1000, 2000);
940 nct6683_write(data, NCT6683_REG_PWM_WRITE(index), val);
941 nct6683_write(data, NCT6683_REG_FAN_CFG_CTRL, NCT6683_FAN_CFG_DONE);
942 mutex_unlock(&data->update_lock);
947 SENSOR_TEMPLATE(pwm, "pwm%d", S_IRUGO, show_pwm, store_pwm, 0);
949 static umode_t nct6683_pwm_is_visible(struct kobject *kobj,
950 struct attribute *attr, int index)
952 struct device *dev = kobj_to_dev(kobj);
953 struct nct6683_data *data = dev_get_drvdata(dev);
954 int pwm = index; /* pwm index */
956 if (!(data->have_pwm & (1 << pwm)))
959 /* Only update pwm values for Mitac boards */
960 if (data->customer_id == NCT6683_CUSTOMER_ID_MITAC)
961 return attr->mode | S_IWUSR;
966 static struct sensor_device_template *nct6683_attributes_pwm_template[] = {
967 &sensor_dev_template_pwm,
971 static const struct sensor_template_group nct6683_pwm_template_group = {
972 .templates = nct6683_attributes_pwm_template,
973 .is_visible = nct6683_pwm_is_visible,
978 beep_enable_show(struct device *dev, struct device_attribute *attr, char *buf)
980 struct nct6683_data *data = dev_get_drvdata(dev);
984 mutex_lock(&data->update_lock);
986 ret = superio_enter(data->sioreg);
989 superio_select(data->sioreg, NCT6683_LD_HWM);
990 reg = superio_inb(data->sioreg, NCT6683_REG_CR_BEEP);
991 superio_exit(data->sioreg);
993 mutex_unlock(&data->update_lock);
995 return sprintf(buf, "%u\n", !!(reg & NCT6683_CR_BEEP_MASK));
998 mutex_unlock(&data->update_lock);
1003 beep_enable_store(struct device *dev, struct device_attribute *attr,
1004 const char *buf, size_t count)
1006 struct nct6683_data *data = dev_get_drvdata(dev);
1011 if (kstrtoul(buf, 10, &val) || (val != 0 && val != 1))
1014 mutex_lock(&data->update_lock);
1016 ret = superio_enter(data->sioreg);
1022 superio_select(data->sioreg, NCT6683_LD_HWM);
1023 reg = superio_inb(data->sioreg, NCT6683_REG_CR_BEEP);
1025 reg |= NCT6683_CR_BEEP_MASK;
1027 reg &= ~NCT6683_CR_BEEP_MASK;
1028 superio_outb(data->sioreg, NCT6683_REG_CR_BEEP, reg);
1029 superio_exit(data->sioreg);
1031 mutex_unlock(&data->update_lock);
1035 /* Case open detection */
1038 intrusion0_alarm_show(struct device *dev, struct device_attribute *attr,
1041 struct nct6683_data *data = dev_get_drvdata(dev);
1045 mutex_lock(&data->update_lock);
1047 ret = superio_enter(data->sioreg);
1050 superio_select(data->sioreg, NCT6683_LD_ACPI);
1051 reg = superio_inb(data->sioreg, NCT6683_REG_CR_CASEOPEN);
1052 superio_exit(data->sioreg);
1054 mutex_unlock(&data->update_lock);
1056 return sprintf(buf, "%u\n", !(reg & NCT6683_CR_CASEOPEN_MASK));
1059 mutex_unlock(&data->update_lock);
1064 intrusion0_alarm_store(struct device *dev, struct device_attribute *attr,
1065 const char *buf, size_t count)
1067 struct nct6683_data *data = dev_get_drvdata(dev);
1072 if (kstrtoul(buf, 10, &val) || val != 0)
1075 mutex_lock(&data->update_lock);
1078 * Use CR registers to clear caseopen status.
1079 * Caseopen is activ low, clear by writing 1 into the register.
1082 ret = superio_enter(data->sioreg);
1088 superio_select(data->sioreg, NCT6683_LD_ACPI);
1089 reg = superio_inb(data->sioreg, NCT6683_REG_CR_CASEOPEN);
1090 reg |= NCT6683_CR_CASEOPEN_MASK;
1091 superio_outb(data->sioreg, NCT6683_REG_CR_CASEOPEN, reg);
1092 reg &= ~NCT6683_CR_CASEOPEN_MASK;
1093 superio_outb(data->sioreg, NCT6683_REG_CR_CASEOPEN, reg);
1094 superio_exit(data->sioreg);
1096 data->valid = false; /* Force cache refresh */
1098 mutex_unlock(&data->update_lock);
1102 static DEVICE_ATTR_RW(intrusion0_alarm);
1103 static DEVICE_ATTR_RW(beep_enable);
1105 static struct attribute *nct6683_attributes_other[] = {
1106 &dev_attr_intrusion0_alarm.attr,
1107 &dev_attr_beep_enable.attr,
1111 static const struct attribute_group nct6683_group_other = {
1112 .attrs = nct6683_attributes_other,
1115 /* Get the monitoring functions started */
1116 static inline void nct6683_init_device(struct nct6683_data *data)
1120 /* Start hardware monitoring if needed */
1121 tmp = nct6683_read(data, NCT6683_HWM_CFG);
1123 nct6683_write(data, NCT6683_HWM_CFG, tmp | 0x80);
1127 * There are a total of 24 fan inputs. Each can be configured as input
1128 * or as output. A maximum of 16 inputs and 8 outputs is configurable.
1131 nct6683_setup_fans(struct nct6683_data *data)
1136 for (i = 0; i < NCT6683_NUM_REG_FAN; i++) {
1137 reg = nct6683_read(data, NCT6683_REG_FANIN_CFG(i));
1139 data->have_fan |= 1 << i;
1140 data->fanin_cfg[i] = reg;
1142 for (i = 0; i < NCT6683_NUM_REG_PWM; i++) {
1143 reg = nct6683_read(data, NCT6683_REG_FANOUT_CFG(i));
1145 data->have_pwm |= 1 << i;
1146 data->fanout_cfg[i] = reg;
1151 * Translation from monitoring register to temperature and voltage attributes
1152 * ==========================================================================
1154 * There are a total of 32 monitoring registers. Each can be assigned to either
1155 * a temperature or voltage monitoring source.
1156 * NCT6683_REG_MON_CFG(x) defines assignment for each monitoring source.
1158 * Temperature and voltage attribute mapping is determined by walking through
1159 * the NCT6683_REG_MON_CFG registers. If the assigned source is
1160 * a temperature, temp_index[n] is set to the monitor register index, and
1161 * temp_src[n] is set to the temperature source. If the assigned source is
1162 * a voltage, the respective values are stored in in_index[] and in_src[],
1166 static void nct6683_setup_sensors(struct nct6683_data *data)
1173 for (i = 0; i < NCT6683_NUM_REG_MON; i++) {
1174 reg = nct6683_read(data, NCT6683_REG_MON_CFG(i)) & 0x7f;
1175 /* Ignore invalid assignments */
1176 if (reg >= NUM_MON_LABELS)
1178 /* Skip if disabled or reserved */
1179 if (nct6683_mon_label[reg] == NULL)
1181 if (reg < MON_VOLTAGE_START) {
1182 data->temp_index[data->temp_num] = i;
1183 data->temp_src[data->temp_num] = reg;
1186 data->in_index[data->in_num] = i;
1187 data->in_src[data->in_num] = reg;
1193 static int nct6683_probe(struct platform_device *pdev)
1195 struct device *dev = &pdev->dev;
1196 struct nct6683_sio_data *sio_data = dev->platform_data;
1197 struct attribute_group *group;
1198 struct nct6683_data *data;
1199 struct device *hwmon_dev;
1200 struct resource *res;
1204 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1205 if (!devm_request_region(dev, res->start, IOREGION_LENGTH, DRVNAME))
1208 data = devm_kzalloc(dev, sizeof(struct nct6683_data), GFP_KERNEL);
1212 data->kind = sio_data->kind;
1213 data->sioreg = sio_data->sioreg;
1214 data->addr = res->start;
1215 mutex_init(&data->update_lock);
1216 platform_set_drvdata(pdev, data);
1218 data->customer_id = nct6683_read16(data, NCT6683_REG_CUSTOMER_ID);
1220 /* By default only instantiate driver if the customer ID is known */
1221 switch (data->customer_id) {
1222 case NCT6683_CUSTOMER_ID_INTEL:
1224 case NCT6683_CUSTOMER_ID_MITAC:
1226 case NCT6683_CUSTOMER_ID_MSI:
1233 nct6683_init_device(data);
1234 nct6683_setup_fans(data);
1235 nct6683_setup_sensors(data);
1237 /* Register sysfs hooks */
1239 if (data->have_pwm) {
1240 group = nct6683_create_attr_group(dev,
1241 &nct6683_pwm_template_group,
1242 fls(data->have_pwm));
1244 return PTR_ERR(group);
1245 data->groups[groups++] = group;
1249 group = nct6683_create_attr_group(dev,
1250 &nct6683_in_template_group,
1253 return PTR_ERR(group);
1254 data->groups[groups++] = group;
1257 if (data->have_fan) {
1258 group = nct6683_create_attr_group(dev,
1259 &nct6683_fan_template_group,
1260 fls(data->have_fan));
1262 return PTR_ERR(group);
1263 data->groups[groups++] = group;
1266 if (data->temp_num) {
1267 group = nct6683_create_attr_group(dev,
1268 &nct6683_temp_template_group,
1271 return PTR_ERR(group);
1272 data->groups[groups++] = group;
1274 data->groups[groups++] = &nct6683_group_other;
1276 if (data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
1277 scnprintf(build, sizeof(build), "%02x/%02x/%02x",
1278 nct6683_read(data, NCT6683_REG_BUILD_MONTH),
1279 nct6683_read(data, NCT6683_REG_BUILD_DAY),
1280 nct6683_read(data, NCT6683_REG_BUILD_YEAR));
1282 scnprintf(build, sizeof(build), "%02d/%02d/%02d",
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 dev_info(dev, "%s EC firmware version %d.%d build %s\n",
1288 nct6683_chip_names[data->kind],
1289 nct6683_read(data, NCT6683_REG_VERSION_HI),
1290 nct6683_read(data, NCT6683_REG_VERSION_LO),
1293 hwmon_dev = devm_hwmon_device_register_with_groups(dev,
1294 nct6683_device_names[data->kind], data, data->groups);
1295 return PTR_ERR_OR_ZERO(hwmon_dev);
1299 static int nct6683_suspend(struct device *dev)
1301 struct nct6683_data *data = nct6683_update_device(dev);
1303 mutex_lock(&data->update_lock);
1304 data->hwm_cfg = nct6683_read(data, NCT6683_HWM_CFG);
1305 mutex_unlock(&data->update_lock);
1310 static int nct6683_resume(struct device *dev)
1312 struct nct6683_data *data = dev_get_drvdata(dev);
1314 mutex_lock(&data->update_lock);
1316 nct6683_write(data, NCT6683_HWM_CFG, data->hwm_cfg);
1318 /* Force re-reading all values */
1319 data->valid = false;
1320 mutex_unlock(&data->update_lock);
1325 static const struct dev_pm_ops nct6683_dev_pm_ops = {
1326 .suspend = nct6683_suspend,
1327 .resume = nct6683_resume,
1328 .freeze = nct6683_suspend,
1329 .restore = nct6683_resume,
1332 #define NCT6683_DEV_PM_OPS (&nct6683_dev_pm_ops)
1334 #define NCT6683_DEV_PM_OPS NULL
1335 #endif /* CONFIG_PM */
1337 static struct platform_driver nct6683_driver = {
1340 .pm = NCT6683_DEV_PM_OPS,
1342 .probe = nct6683_probe,
1345 static int __init nct6683_find(int sioaddr, struct nct6683_sio_data *sio_data)
1351 err = superio_enter(sioaddr);
1355 val = (superio_inb(sioaddr, SIO_REG_DEVID) << 8)
1356 | superio_inb(sioaddr, SIO_REG_DEVID + 1);
1358 switch (val & SIO_ID_MASK) {
1359 case SIO_NCT6683_ID:
1360 sio_data->kind = nct6683;
1362 case SIO_NCT6687_ID:
1363 sio_data->kind = nct6687;
1367 pr_debug("unsupported chip ID: 0x%04x\n", val);
1371 /* We have a known chip, find the HWM I/O address */
1372 superio_select(sioaddr, NCT6683_LD_HWM);
1373 val = (superio_inb(sioaddr, SIO_REG_ADDR) << 8)
1374 | superio_inb(sioaddr, SIO_REG_ADDR + 1);
1375 addr = val & IOREGION_ALIGNMENT;
1377 pr_err("EC base I/O port unconfigured\n");
1381 /* Activate logical device if needed */
1382 val = superio_inb(sioaddr, SIO_REG_ENABLE);
1383 if (!(val & 0x01)) {
1384 pr_warn("Forcibly enabling EC access. Data may be unusable.\n");
1385 superio_outb(sioaddr, SIO_REG_ENABLE, val | 0x01);
1388 superio_exit(sioaddr);
1389 pr_info("Found %s or compatible chip at %#x:%#x\n",
1390 nct6683_chip_names[sio_data->kind], sioaddr, addr);
1391 sio_data->sioreg = sioaddr;
1396 superio_exit(sioaddr);
1401 * when Super-I/O functions move to a separate file, the Super-I/O
1402 * bus will manage the lifetime of the device and this module will only keep
1403 * track of the nct6683 driver. But since we use platform_device_alloc(), we
1404 * must keep track of the device
1406 static struct platform_device *pdev[2];
1408 static int __init sensors_nct6683_init(void)
1410 struct nct6683_sio_data sio_data;
1411 int sioaddr[2] = { 0x2e, 0x4e };
1412 struct resource res;
1417 err = platform_driver_register(&nct6683_driver);
1422 * initialize sio_data->kind and sio_data->sioreg.
1424 * when Super-I/O functions move to a separate file, the Super-I/O
1425 * driver will probe 0x2e and 0x4e and auto-detect the presence of a
1426 * nct6683 hardware monitor, and call probe()
1428 for (i = 0; i < ARRAY_SIZE(pdev); i++) {
1429 address = nct6683_find(sioaddr[i], &sio_data);
1435 pdev[i] = platform_device_alloc(DRVNAME, address);
1438 goto exit_device_unregister;
1441 err = platform_device_add_data(pdev[i], &sio_data,
1442 sizeof(struct nct6683_sio_data));
1444 goto exit_device_put;
1446 memset(&res, 0, sizeof(res));
1448 res.start = address + IOREGION_OFFSET;
1449 res.end = address + IOREGION_OFFSET + IOREGION_LENGTH - 1;
1450 res.flags = IORESOURCE_IO;
1452 err = acpi_check_resource_conflict(&res);
1454 platform_device_put(pdev[i]);
1459 err = platform_device_add_resources(pdev[i], &res, 1);
1461 goto exit_device_put;
1463 /* platform_device_add calls probe() */
1464 err = platform_device_add(pdev[i]);
1466 goto exit_device_put;
1470 goto exit_unregister;
1476 platform_device_put(pdev[i]);
1477 exit_device_unregister:
1480 platform_device_unregister(pdev[i]);
1483 platform_driver_unregister(&nct6683_driver);
1487 static void __exit sensors_nct6683_exit(void)
1491 for (i = 0; i < ARRAY_SIZE(pdev); i++) {
1493 platform_device_unregister(pdev[i]);
1495 platform_driver_unregister(&nct6683_driver);
1499 MODULE_DESCRIPTION("NCT6683D driver");
1500 MODULE_LICENSE("GPL");
1502 module_init(sensors_nct6683_init);
1503 module_exit(sensors_nct6683_exit);