2 * nct6683 - Driver for the hardware monitoring functionality of
3 * Nuvoton NCT6683D eSIO
7 * Derived from nct6775 driver
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * Supports the following chips:
22 * Chip #vin #fan #pwm #temp chip ID
23 * nct6683d 21(1) 16 8 32(1) 0xc730
26 * (1) Total number of vin and temp inputs is 32.
29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31 #include <linux/acpi.h>
32 #include <linux/delay.h>
33 #include <linux/err.h>
34 #include <linux/init.h>
36 #include <linux/jiffies.h>
37 #include <linux/hwmon.h>
38 #include <linux/hwmon-sysfs.h>
39 #include <linux/module.h>
40 #include <linux/mutex.h>
41 #include <linux/platform_device.h>
42 #include <linux/slab.h>
44 enum kinds { nct6683 };
47 module_param(force, bool, 0);
48 MODULE_PARM_DESC(force, "Set to one to enable support for unknown vendors");
50 static const char * const nct6683_device_names[] = {
54 static const char * const nct6683_chip_names[] = {
58 #define DRVNAME "nct6683"
61 * Super-I/O constants and functions
64 #define NCT6683_LD_ACPI 0x0a
65 #define NCT6683_LD_HWM 0x0b
66 #define NCT6683_LD_VID 0x0d
68 #define SIO_REG_LDSEL 0x07 /* Logical device select */
69 #define SIO_REG_DEVID 0x20 /* Device ID (2 bytes) */
70 #define SIO_REG_ENABLE 0x30 /* Logical device enable */
71 #define SIO_REG_ADDR 0x60 /* Logical device address (2 bytes) */
73 #define SIO_NCT6681_ID 0xb270 /* for later */
74 #define SIO_NCT6683_ID 0xc730
75 #define SIO_ID_MASK 0xFFF0
78 superio_outb(int ioreg, int reg, int val)
85 superio_inb(int ioreg, int reg)
88 return inb(ioreg + 1);
92 superio_select(int ioreg, int ld)
94 outb(SIO_REG_LDSEL, ioreg);
99 superio_enter(int ioreg)
102 * Try to reserve <ioreg> and <ioreg + 1> for exclusive access.
104 if (!request_muxed_region(ioreg, 2, DRVNAME))
114 superio_exit(int ioreg)
118 outb(0x02, ioreg + 1);
119 release_region(ioreg, 2);
126 #define IOREGION_ALIGNMENT (~7)
127 #define IOREGION_OFFSET 4 /* Use EC port 1 */
128 #define IOREGION_LENGTH 4
130 #define EC_PAGE_REG 0
131 #define EC_INDEX_REG 1
132 #define EC_DATA_REG 2
133 #define EC_EVENT_REG 3
135 /* Common and NCT6683 specific data */
137 #define NCT6683_NUM_REG_MON 32
138 #define NCT6683_NUM_REG_FAN 16
139 #define NCT6683_NUM_REG_PWM 8
141 #define NCT6683_REG_MON(x) (0x100 + (x) * 2)
142 #define NCT6683_REG_FAN_RPM(x) (0x140 + (x) * 2)
143 #define NCT6683_REG_PWM(x) (0x160 + (x))
144 #define NCT6683_REG_PWM_WRITE(x) (0xa28 + (x))
146 #define NCT6683_REG_MON_STS(x) (0x174 + (x))
147 #define NCT6683_REG_IDLE(x) (0x178 + (x))
149 #define NCT6683_REG_FAN_STS(x) (0x17c + (x))
150 #define NCT6683_REG_FAN_ERRSTS 0x17e
151 #define NCT6683_REG_FAN_INITSTS 0x17f
153 #define NCT6683_HWM_CFG 0x180
155 #define NCT6683_REG_MON_CFG(x) (0x1a0 + (x))
156 #define NCT6683_REG_FANIN_CFG(x) (0x1c0 + (x))
157 #define NCT6683_REG_FANOUT_CFG(x) (0x1d0 + (x))
159 #define NCT6683_REG_INTEL_TEMP_MAX(x) (0x901 + (x) * 16)
160 #define NCT6683_REG_INTEL_TEMP_CRIT(x) (0x90d + (x) * 16)
162 #define NCT6683_REG_TEMP_HYST(x) (0x330 + (x)) /* 8 bit */
163 #define NCT6683_REG_TEMP_MAX(x) (0x350 + (x)) /* 8 bit */
164 #define NCT6683_REG_MON_HIGH(x) (0x370 + (x) * 2) /* 8 bit */
165 #define NCT6683_REG_MON_LOW(x) (0x371 + (x) * 2) /* 8 bit */
167 #define NCT6683_REG_FAN_MIN(x) (0x3b8 + (x) * 2) /* 16 bit */
169 #define NCT6683_REG_FAN_CFG_CTRL 0xa01
170 #define NCT6683_FAN_CFG_REQ 0x80
171 #define NCT6683_FAN_CFG_DONE 0x40
173 #define NCT6683_REG_CUSTOMER_ID 0x602
174 #define NCT6683_CUSTOMER_ID_INTEL 0x805
175 #define NCT6683_CUSTOMER_ID_MITAC 0xa0e
177 #define NCT6683_REG_BUILD_YEAR 0x604
178 #define NCT6683_REG_BUILD_MONTH 0x605
179 #define NCT6683_REG_BUILD_DAY 0x606
180 #define NCT6683_REG_SERIAL 0x607
181 #define NCT6683_REG_VERSION_HI 0x608
182 #define NCT6683_REG_VERSION_LO 0x609
184 #define NCT6683_REG_CR_CASEOPEN 0xe8
185 #define NCT6683_CR_CASEOPEN_MASK (1 << 7)
187 #define NCT6683_REG_CR_BEEP 0xe0
188 #define NCT6683_CR_BEEP_MASK (1 << 6)
190 static const char *const nct6683_mon_label[] = {
207 "Thermistor 5", /* 0x10 */
216 NULL, NULL, NULL, NULL, NULL, NULL, NULL,
217 "PECI 0.0", /* 0x20 */
229 NULL, NULL, NULL, NULL,
230 "PCH CPU", /* 0x30 */
256 NULL, NULL, NULL, NULL, NULL, NULL,
257 "Virtual 0", /* 0x50 */
265 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
266 "VCC", /* 0x60 voltage sensors */
291 #define NUM_MON_LABELS ARRAY_SIZE(nct6683_mon_label)
292 #define MON_VOLTAGE_START 0x60
294 /* ------------------------------------------------------- */
296 struct nct6683_data {
297 int addr; /* IO base of EC space */
298 int sioreg; /* SIO register */
302 struct device *hwmon_dev;
303 const struct attribute_group *groups[6];
305 int temp_num; /* number of temperature attributes */
306 u8 temp_index[NCT6683_NUM_REG_MON];
307 u8 temp_src[NCT6683_NUM_REG_MON];
309 u8 in_num; /* number of voltage attributes */
310 u8 in_index[NCT6683_NUM_REG_MON];
311 u8 in_src[NCT6683_NUM_REG_MON];
313 struct mutex update_lock; /* used to protect sensor updates */
314 bool valid; /* true if following fields are valid */
315 unsigned long last_updated; /* In jiffies */
317 /* Voltage attribute values */
318 u8 in[3][NCT6683_NUM_REG_MON]; /* [0]=in, [1]=in_max, [2]=in_min */
320 /* Temperature attribute values */
321 s16 temp_in[NCT6683_NUM_REG_MON];
322 s8 temp[4][NCT6683_NUM_REG_MON];/* [0]=min, [1]=max, [2]=hyst,
326 /* Fan attribute values */
327 unsigned int rpm[NCT6683_NUM_REG_FAN];
328 u16 fan_min[NCT6683_NUM_REG_FAN];
329 u8 fanin_cfg[NCT6683_NUM_REG_FAN];
330 u8 fanout_cfg[NCT6683_NUM_REG_FAN];
331 u16 have_fan; /* some fan inputs can be disabled */
334 u8 pwm[NCT6683_NUM_REG_PWM];
337 /* Remember extra register values over suspend/resume */
342 struct nct6683_sio_data {
347 struct sensor_device_template {
348 struct device_attribute dev_attr;
356 bool s2; /* true if both index and nr are used */
359 struct sensor_device_attr_u {
361 struct sensor_device_attribute a1;
362 struct sensor_device_attribute_2 a2;
367 #define __TEMPLATE_ATTR(_template, _mode, _show, _store) { \
368 .attr = {.name = _template, .mode = _mode }, \
373 #define SENSOR_DEVICE_TEMPLATE(_template, _mode, _show, _store, _index) \
374 { .dev_attr = __TEMPLATE_ATTR(_template, _mode, _show, _store), \
378 #define SENSOR_DEVICE_TEMPLATE_2(_template, _mode, _show, _store, \
380 { .dev_attr = __TEMPLATE_ATTR(_template, _mode, _show, _store), \
381 .u.s.index = _index, \
385 #define SENSOR_TEMPLATE(_name, _template, _mode, _show, _store, _index) \
386 static struct sensor_device_template sensor_dev_template_##_name \
387 = SENSOR_DEVICE_TEMPLATE(_template, _mode, _show, _store, \
390 #define SENSOR_TEMPLATE_2(_name, _template, _mode, _show, _store, \
392 static struct sensor_device_template sensor_dev_template_##_name \
393 = SENSOR_DEVICE_TEMPLATE_2(_template, _mode, _show, _store, \
396 struct sensor_template_group {
397 struct sensor_device_template **templates;
398 umode_t (*is_visible)(struct kobject *, struct attribute *, int);
402 static struct attribute_group *
403 nct6683_create_attr_group(struct device *dev,
404 const struct sensor_template_group *tg,
407 struct sensor_device_attribute_2 *a2;
408 struct sensor_device_attribute *a;
409 struct sensor_device_template **t;
410 struct sensor_device_attr_u *su;
411 struct attribute_group *group;
412 struct attribute **attrs;
416 return ERR_PTR(-EINVAL);
419 for (count = 0; *t; t++, count++)
423 return ERR_PTR(-EINVAL);
425 group = devm_kzalloc(dev, sizeof(*group), GFP_KERNEL);
427 return ERR_PTR(-ENOMEM);
429 attrs = devm_kcalloc(dev, repeat * count + 1, sizeof(*attrs),
432 return ERR_PTR(-ENOMEM);
434 su = devm_kzalloc(dev, array3_size(repeat, count, sizeof(*su)),
437 return ERR_PTR(-ENOMEM);
439 group->attrs = attrs;
440 group->is_visible = tg->is_visible;
442 for (i = 0; i < repeat; i++) {
444 for (j = 0; *t != NULL; j++) {
445 snprintf(su->name, sizeof(su->name),
446 (*t)->dev_attr.attr.name, tg->base + i);
449 sysfs_attr_init(&a2->dev_attr.attr);
450 a2->dev_attr.attr.name = su->name;
451 a2->nr = (*t)->u.s.nr + i;
452 a2->index = (*t)->u.s.index;
453 a2->dev_attr.attr.mode =
454 (*t)->dev_attr.attr.mode;
455 a2->dev_attr.show = (*t)->dev_attr.show;
456 a2->dev_attr.store = (*t)->dev_attr.store;
457 *attrs = &a2->dev_attr.attr;
460 sysfs_attr_init(&a->dev_attr.attr);
461 a->dev_attr.attr.name = su->name;
462 a->index = (*t)->u.index + i;
463 a->dev_attr.attr.mode =
464 (*t)->dev_attr.attr.mode;
465 a->dev_attr.show = (*t)->dev_attr.show;
466 a->dev_attr.store = (*t)->dev_attr.store;
467 *attrs = &a->dev_attr.attr;
478 /* LSB is 16 mV, except for the following sources, where it is 32 mV */
479 #define MON_SRC_VCC 0x60
480 #define MON_SRC_VSB 0x61
481 #define MON_SRC_AVSB 0x62
482 #define MON_SRC_VBAT 0x64
484 static inline long in_from_reg(u16 reg, u8 src)
488 if (src == MON_SRC_VCC || src == MON_SRC_VSB || src == MON_SRC_AVSB ||
494 static inline u16 in_to_reg(u32 val, u8 src)
498 if (src == MON_SRC_VCC || src == MON_SRC_VSB || src == MON_SRC_AVSB ||
502 return clamp_val(DIV_ROUND_CLOSEST(val, scale), 0, 127);
505 static u16 nct6683_read(struct nct6683_data *data, u16 reg)
509 outb_p(0xff, data->addr + EC_PAGE_REG); /* unlock */
510 outb_p(reg >> 8, data->addr + EC_PAGE_REG);
511 outb_p(reg & 0xff, data->addr + EC_INDEX_REG);
512 res = inb_p(data->addr + EC_DATA_REG);
516 static u16 nct6683_read16(struct nct6683_data *data, u16 reg)
518 return (nct6683_read(data, reg) << 8) | nct6683_read(data, reg + 1);
521 static void nct6683_write(struct nct6683_data *data, u16 reg, u16 value)
523 outb_p(0xff, data->addr + EC_PAGE_REG); /* unlock */
524 outb_p(reg >> 8, data->addr + EC_PAGE_REG);
525 outb_p(reg & 0xff, data->addr + EC_INDEX_REG);
526 outb_p(value & 0xff, data->addr + EC_DATA_REG);
529 static int get_in_reg(struct nct6683_data *data, int nr, int index)
531 int ch = data->in_index[index];
536 reg = NCT6683_REG_MON(ch);
539 if (data->customer_id != NCT6683_CUSTOMER_ID_INTEL)
540 reg = NCT6683_REG_MON_LOW(ch);
543 if (data->customer_id != NCT6683_CUSTOMER_ID_INTEL)
544 reg = NCT6683_REG_MON_HIGH(ch);
552 static int get_temp_reg(struct nct6683_data *data, int nr, int index)
554 int ch = data->temp_index[index];
557 switch (data->customer_id) {
558 case NCT6683_CUSTOMER_ID_INTEL:
562 reg = NCT6683_REG_INTEL_TEMP_MAX(ch);
565 reg = NCT6683_REG_INTEL_TEMP_CRIT(ch);
569 case NCT6683_CUSTOMER_ID_MITAC:
574 reg = NCT6683_REG_MON_LOW(ch);
577 reg = NCT6683_REG_TEMP_MAX(ch);
580 reg = NCT6683_REG_TEMP_HYST(ch);
583 reg = NCT6683_REG_MON_HIGH(ch);
591 static void nct6683_update_pwm(struct device *dev)
593 struct nct6683_data *data = dev_get_drvdata(dev);
596 for (i = 0; i < NCT6683_NUM_REG_PWM; i++) {
597 if (!(data->have_pwm & (1 << i)))
599 data->pwm[i] = nct6683_read(data, NCT6683_REG_PWM(i));
603 static struct nct6683_data *nct6683_update_device(struct device *dev)
605 struct nct6683_data *data = dev_get_drvdata(dev);
608 mutex_lock(&data->update_lock);
610 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
611 /* Measured voltages and limits */
612 for (i = 0; i < data->in_num; i++) {
613 for (j = 0; j < 3; j++) {
614 int reg = get_in_reg(data, j, i);
618 nct6683_read(data, reg);
622 /* Measured temperatures and limits */
623 for (i = 0; i < data->temp_num; i++) {
624 u8 ch = data->temp_index[i];
626 data->temp_in[i] = nct6683_read16(data,
627 NCT6683_REG_MON(ch));
628 for (j = 0; j < 4; j++) {
629 int reg = get_temp_reg(data, j, i);
633 nct6683_read(data, reg);
637 /* Measured fan speeds and limits */
638 for (i = 0; i < ARRAY_SIZE(data->rpm); i++) {
639 if (!(data->have_fan & (1 << i)))
642 data->rpm[i] = nct6683_read16(data,
643 NCT6683_REG_FAN_RPM(i));
644 data->fan_min[i] = nct6683_read16(data,
645 NCT6683_REG_FAN_MIN(i));
648 nct6683_update_pwm(dev);
650 data->last_updated = jiffies;
654 mutex_unlock(&data->update_lock);
659 * Sysfs callback functions
662 show_in_label(struct device *dev, struct device_attribute *attr, char *buf)
664 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
665 struct nct6683_data *data = nct6683_update_device(dev);
666 int nr = sattr->index;
668 return sprintf(buf, "%s\n", nct6683_mon_label[data->in_src[nr]]);
672 show_in_reg(struct device *dev, struct device_attribute *attr, char *buf)
674 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
675 struct nct6683_data *data = nct6683_update_device(dev);
676 int index = sattr->index;
679 return sprintf(buf, "%ld\n",
680 in_from_reg(data->in[index][nr], data->in_index[index]));
683 static umode_t nct6683_in_is_visible(struct kobject *kobj,
684 struct attribute *attr, int index)
686 struct device *dev = container_of(kobj, struct device, kobj);
687 struct nct6683_data *data = dev_get_drvdata(dev);
688 int nr = index % 4; /* attribute */
691 * Voltage limits exist for Intel boards,
692 * but register location and encoding is unknown
694 if ((nr == 2 || nr == 3) &&
695 data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
701 SENSOR_TEMPLATE(in_label, "in%d_label", S_IRUGO, show_in_label, NULL, 0);
702 SENSOR_TEMPLATE_2(in_input, "in%d_input", S_IRUGO, show_in_reg, NULL, 0, 0);
703 SENSOR_TEMPLATE_2(in_min, "in%d_min", S_IRUGO, show_in_reg, NULL, 0, 1);
704 SENSOR_TEMPLATE_2(in_max, "in%d_max", S_IRUGO, show_in_reg, NULL, 0, 2);
706 static struct sensor_device_template *nct6683_attributes_in_template[] = {
707 &sensor_dev_template_in_label,
708 &sensor_dev_template_in_input,
709 &sensor_dev_template_in_min,
710 &sensor_dev_template_in_max,
714 static const struct sensor_template_group nct6683_in_template_group = {
715 .templates = nct6683_attributes_in_template,
716 .is_visible = nct6683_in_is_visible,
720 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
722 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
723 struct nct6683_data *data = nct6683_update_device(dev);
725 return sprintf(buf, "%d\n", data->rpm[sattr->index]);
729 show_fan_min(struct device *dev, struct device_attribute *attr, char *buf)
731 struct nct6683_data *data = nct6683_update_device(dev);
732 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
733 int nr = sattr->index;
735 return sprintf(buf, "%d\n", data->fan_min[nr]);
739 show_fan_pulses(struct device *dev, struct device_attribute *attr, char *buf)
741 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
742 struct nct6683_data *data = nct6683_update_device(dev);
744 return sprintf(buf, "%d\n",
745 ((data->fanin_cfg[sattr->index] >> 5) & 0x03) + 1);
748 static umode_t nct6683_fan_is_visible(struct kobject *kobj,
749 struct attribute *attr, int index)
751 struct device *dev = container_of(kobj, struct device, kobj);
752 struct nct6683_data *data = dev_get_drvdata(dev);
753 int fan = index / 3; /* fan index */
754 int nr = index % 3; /* attribute index */
756 if (!(data->have_fan & (1 << fan)))
760 * Intel may have minimum fan speed limits,
761 * but register location and encoding are unknown.
763 if (nr == 2 && data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
769 SENSOR_TEMPLATE(fan_input, "fan%d_input", S_IRUGO, show_fan, NULL, 0);
770 SENSOR_TEMPLATE(fan_pulses, "fan%d_pulses", S_IRUGO, show_fan_pulses, NULL, 0);
771 SENSOR_TEMPLATE(fan_min, "fan%d_min", S_IRUGO, show_fan_min, NULL, 0);
774 * nct6683_fan_is_visible uses the index into the following array
775 * to determine if attributes should be created or not.
776 * Any change in order or content must be matched.
778 static struct sensor_device_template *nct6683_attributes_fan_template[] = {
779 &sensor_dev_template_fan_input,
780 &sensor_dev_template_fan_pulses,
781 &sensor_dev_template_fan_min,
785 static const struct sensor_template_group nct6683_fan_template_group = {
786 .templates = nct6683_attributes_fan_template,
787 .is_visible = nct6683_fan_is_visible,
792 show_temp_label(struct device *dev, struct device_attribute *attr, char *buf)
794 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
795 struct nct6683_data *data = nct6683_update_device(dev);
796 int nr = sattr->index;
798 return sprintf(buf, "%s\n", nct6683_mon_label[data->temp_src[nr]]);
802 show_temp8(struct device *dev, struct device_attribute *attr, char *buf)
804 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
805 struct nct6683_data *data = nct6683_update_device(dev);
806 int index = sattr->index;
809 return sprintf(buf, "%d\n", data->temp[index][nr] * 1000);
813 show_temp_hyst(struct device *dev, struct device_attribute *attr, char *buf)
815 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
816 struct nct6683_data *data = nct6683_update_device(dev);
817 int nr = sattr->index;
818 int temp = data->temp[1][nr] - data->temp[2][nr];
820 return sprintf(buf, "%d\n", temp * 1000);
824 show_temp16(struct device *dev, struct device_attribute *attr, char *buf)
826 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
827 struct nct6683_data *data = nct6683_update_device(dev);
828 int index = sattr->index;
830 return sprintf(buf, "%d\n", (data->temp_in[index] / 128) * 500);
834 * Temperature sensor type is determined by temperature source
835 * and can not be modified.
836 * 0x02..0x07: Thermal diode
837 * 0x08..0x18: Thermistor
838 * 0x20..0x2b: Intel PECI
839 * 0x42..0x49: AMD TSI
840 * Others are unspecified (not visible)
843 static int get_temp_type(u8 src)
845 if (src >= 0x02 && src <= 0x07)
846 return 3; /* thermal diode */
847 else if (src >= 0x08 && src <= 0x18)
848 return 4; /* thermistor */
849 else if (src >= 0x20 && src <= 0x2b)
851 else if (src >= 0x42 && src <= 0x49)
858 show_temp_type(struct device *dev, struct device_attribute *attr, char *buf)
860 struct nct6683_data *data = nct6683_update_device(dev);
861 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
862 int nr = sattr->index;
863 return sprintf(buf, "%d\n", get_temp_type(data->temp_src[nr]));
866 static umode_t nct6683_temp_is_visible(struct kobject *kobj,
867 struct attribute *attr, int index)
869 struct device *dev = container_of(kobj, struct device, kobj);
870 struct nct6683_data *data = dev_get_drvdata(dev);
871 int temp = index / 7; /* temp index */
872 int nr = index % 7; /* attribute index */
875 * Intel does not have low temperature limits or temperature hysteresis
876 * registers, or at least register location and encoding is unknown.
878 if ((nr == 2 || nr == 4) &&
879 data->customer_id == NCT6683_CUSTOMER_ID_INTEL)
882 if (nr == 6 && get_temp_type(data->temp_src[temp]) == 0)
888 SENSOR_TEMPLATE(temp_input, "temp%d_input", S_IRUGO, show_temp16, NULL, 0);
889 SENSOR_TEMPLATE(temp_label, "temp%d_label", S_IRUGO, show_temp_label, NULL, 0);
890 SENSOR_TEMPLATE_2(temp_min, "temp%d_min", S_IRUGO, show_temp8, NULL, 0, 0);
891 SENSOR_TEMPLATE_2(temp_max, "temp%d_max", S_IRUGO, show_temp8, NULL, 0, 1);
892 SENSOR_TEMPLATE(temp_max_hyst, "temp%d_max_hyst", S_IRUGO, show_temp_hyst, NULL,
894 SENSOR_TEMPLATE_2(temp_crit, "temp%d_crit", S_IRUGO, show_temp8, NULL, 0, 3);
895 SENSOR_TEMPLATE(temp_type, "temp%d_type", S_IRUGO, show_temp_type, NULL, 0);
898 * nct6683_temp_is_visible uses the index into the following array
899 * to determine if attributes should be created or not.
900 * Any change in order or content must be matched.
902 static struct sensor_device_template *nct6683_attributes_temp_template[] = {
903 &sensor_dev_template_temp_input,
904 &sensor_dev_template_temp_label,
905 &sensor_dev_template_temp_min, /* 2 */
906 &sensor_dev_template_temp_max, /* 3 */
907 &sensor_dev_template_temp_max_hyst, /* 4 */
908 &sensor_dev_template_temp_crit, /* 5 */
909 &sensor_dev_template_temp_type, /* 6 */
913 static const struct sensor_template_group nct6683_temp_template_group = {
914 .templates = nct6683_attributes_temp_template,
915 .is_visible = nct6683_temp_is_visible,
920 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
922 struct nct6683_data *data = nct6683_update_device(dev);
923 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
924 int index = sattr->index;
926 return sprintf(buf, "%d\n", data->pwm[index]);
930 store_pwm(struct device *dev, struct device_attribute *attr, const char *buf,
933 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
934 struct nct6683_data *data = dev_get_drvdata(dev);
935 int index = sattr->index;
938 if (kstrtoul(buf, 10, &val) || val > 255)
941 mutex_lock(&data->update_lock);
942 nct6683_write(data, NCT6683_REG_FAN_CFG_CTRL, NCT6683_FAN_CFG_REQ);
943 usleep_range(1000, 2000);
944 nct6683_write(data, NCT6683_REG_PWM_WRITE(index), val);
945 nct6683_write(data, NCT6683_REG_FAN_CFG_CTRL, NCT6683_FAN_CFG_DONE);
946 mutex_unlock(&data->update_lock);
951 SENSOR_TEMPLATE(pwm, "pwm%d", S_IRUGO, show_pwm, store_pwm, 0);
953 static umode_t nct6683_pwm_is_visible(struct kobject *kobj,
954 struct attribute *attr, int index)
956 struct device *dev = container_of(kobj, struct device, kobj);
957 struct nct6683_data *data = dev_get_drvdata(dev);
958 int pwm = index; /* pwm index */
960 if (!(data->have_pwm & (1 << pwm)))
963 /* Only update pwm values for Mitac boards */
964 if (data->customer_id == NCT6683_CUSTOMER_ID_MITAC)
965 return attr->mode | S_IWUSR;
970 static struct sensor_device_template *nct6683_attributes_pwm_template[] = {
971 &sensor_dev_template_pwm,
975 static const struct sensor_template_group nct6683_pwm_template_group = {
976 .templates = nct6683_attributes_pwm_template,
977 .is_visible = nct6683_pwm_is_visible,
982 beep_enable_show(struct device *dev, struct device_attribute *attr, char *buf)
984 struct nct6683_data *data = dev_get_drvdata(dev);
988 mutex_lock(&data->update_lock);
990 ret = superio_enter(data->sioreg);
993 superio_select(data->sioreg, NCT6683_LD_HWM);
994 reg = superio_inb(data->sioreg, NCT6683_REG_CR_BEEP);
995 superio_exit(data->sioreg);
997 mutex_unlock(&data->update_lock);
999 return sprintf(buf, "%u\n", !!(reg & NCT6683_CR_BEEP_MASK));
1002 mutex_unlock(&data->update_lock);
1007 beep_enable_store(struct device *dev, struct device_attribute *attr,
1008 const char *buf, size_t count)
1010 struct nct6683_data *data = dev_get_drvdata(dev);
1015 if (kstrtoul(buf, 10, &val) || (val != 0 && val != 1))
1018 mutex_lock(&data->update_lock);
1020 ret = superio_enter(data->sioreg);
1026 superio_select(data->sioreg, NCT6683_LD_HWM);
1027 reg = superio_inb(data->sioreg, NCT6683_REG_CR_BEEP);
1029 reg |= NCT6683_CR_BEEP_MASK;
1031 reg &= ~NCT6683_CR_BEEP_MASK;
1032 superio_outb(data->sioreg, NCT6683_REG_CR_BEEP, reg);
1033 superio_exit(data->sioreg);
1035 mutex_unlock(&data->update_lock);
1039 /* Case open detection */
1042 intrusion0_alarm_show(struct device *dev, struct device_attribute *attr,
1045 struct nct6683_data *data = dev_get_drvdata(dev);
1049 mutex_lock(&data->update_lock);
1051 ret = superio_enter(data->sioreg);
1054 superio_select(data->sioreg, NCT6683_LD_ACPI);
1055 reg = superio_inb(data->sioreg, NCT6683_REG_CR_CASEOPEN);
1056 superio_exit(data->sioreg);
1058 mutex_unlock(&data->update_lock);
1060 return sprintf(buf, "%u\n", !(reg & NCT6683_CR_CASEOPEN_MASK));
1063 mutex_unlock(&data->update_lock);
1068 intrusion0_alarm_store(struct device *dev, struct device_attribute *attr,
1069 const char *buf, size_t count)
1071 struct nct6683_data *data = dev_get_drvdata(dev);
1076 if (kstrtoul(buf, 10, &val) || val != 0)
1079 mutex_lock(&data->update_lock);
1082 * Use CR registers to clear caseopen status.
1083 * Caseopen is activ low, clear by writing 1 into the register.
1086 ret = superio_enter(data->sioreg);
1092 superio_select(data->sioreg, NCT6683_LD_ACPI);
1093 reg = superio_inb(data->sioreg, NCT6683_REG_CR_CASEOPEN);
1094 reg |= NCT6683_CR_CASEOPEN_MASK;
1095 superio_outb(data->sioreg, NCT6683_REG_CR_CASEOPEN, reg);
1096 reg &= ~NCT6683_CR_CASEOPEN_MASK;
1097 superio_outb(data->sioreg, NCT6683_REG_CR_CASEOPEN, reg);
1098 superio_exit(data->sioreg);
1100 data->valid = false; /* Force cache refresh */
1102 mutex_unlock(&data->update_lock);
1106 static DEVICE_ATTR_RW(intrusion0_alarm);
1107 static DEVICE_ATTR_RW(beep_enable);
1109 static struct attribute *nct6683_attributes_other[] = {
1110 &dev_attr_intrusion0_alarm.attr,
1111 &dev_attr_beep_enable.attr,
1115 static const struct attribute_group nct6683_group_other = {
1116 .attrs = nct6683_attributes_other,
1119 /* Get the monitoring functions started */
1120 static inline void nct6683_init_device(struct nct6683_data *data)
1124 /* Start hardware monitoring if needed */
1125 tmp = nct6683_read(data, NCT6683_HWM_CFG);
1127 nct6683_write(data, NCT6683_HWM_CFG, tmp | 0x80);
1131 * There are a total of 24 fan inputs. Each can be configured as input
1132 * or as output. A maximum of 16 inputs and 8 outputs is configurable.
1135 nct6683_setup_fans(struct nct6683_data *data)
1140 for (i = 0; i < NCT6683_NUM_REG_FAN; i++) {
1141 reg = nct6683_read(data, NCT6683_REG_FANIN_CFG(i));
1143 data->have_fan |= 1 << i;
1144 data->fanin_cfg[i] = reg;
1146 for (i = 0; i < NCT6683_NUM_REG_PWM; i++) {
1147 reg = nct6683_read(data, NCT6683_REG_FANOUT_CFG(i));
1149 data->have_pwm |= 1 << i;
1150 data->fanout_cfg[i] = reg;
1155 * Translation from monitoring register to temperature and voltage attributes
1156 * ==========================================================================
1158 * There are a total of 32 monitoring registers. Each can be assigned to either
1159 * a temperature or voltage monitoring source.
1160 * NCT6683_REG_MON_CFG(x) defines assignment for each monitoring source.
1162 * Temperature and voltage attribute mapping is determined by walking through
1163 * the NCT6683_REG_MON_CFG registers. If the assigned source is
1164 * a temperature, temp_index[n] is set to the monitor register index, and
1165 * temp_src[n] is set to the temperature source. If the assigned source is
1166 * a voltage, the respective values are stored in in_index[] and in_src[],
1170 static void nct6683_setup_sensors(struct nct6683_data *data)
1177 for (i = 0; i < NCT6683_NUM_REG_MON; i++) {
1178 reg = nct6683_read(data, NCT6683_REG_MON_CFG(i)) & 0x7f;
1179 /* Ignore invalid assignments */
1180 if (reg >= NUM_MON_LABELS)
1182 /* Skip if disabled or reserved */
1183 if (nct6683_mon_label[reg] == NULL)
1185 if (reg < MON_VOLTAGE_START) {
1186 data->temp_index[data->temp_num] = i;
1187 data->temp_src[data->temp_num] = reg;
1190 data->in_index[data->in_num] = i;
1191 data->in_src[data->in_num] = reg;
1197 static int nct6683_probe(struct platform_device *pdev)
1199 struct device *dev = &pdev->dev;
1200 struct nct6683_sio_data *sio_data = dev->platform_data;
1201 struct attribute_group *group;
1202 struct nct6683_data *data;
1203 struct device *hwmon_dev;
1204 struct resource *res;
1208 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1209 if (!devm_request_region(dev, res->start, IOREGION_LENGTH, DRVNAME))
1212 data = devm_kzalloc(dev, sizeof(struct nct6683_data), GFP_KERNEL);
1216 data->kind = sio_data->kind;
1217 data->sioreg = sio_data->sioreg;
1218 data->addr = res->start;
1219 mutex_init(&data->update_lock);
1220 platform_set_drvdata(pdev, data);
1222 data->customer_id = nct6683_read16(data, NCT6683_REG_CUSTOMER_ID);
1224 /* By default only instantiate driver if the customer ID is known */
1225 switch (data->customer_id) {
1226 case NCT6683_CUSTOMER_ID_INTEL:
1228 case NCT6683_CUSTOMER_ID_MITAC:
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;
1366 pr_debug("unsupported chip ID: 0x%04x\n", val);
1370 /* We have a known chip, find the HWM I/O address */
1371 superio_select(sioaddr, NCT6683_LD_HWM);
1372 val = (superio_inb(sioaddr, SIO_REG_ADDR) << 8)
1373 | superio_inb(sioaddr, SIO_REG_ADDR + 1);
1374 addr = val & IOREGION_ALIGNMENT;
1376 pr_err("EC base I/O port unconfigured\n");
1380 /* Activate logical device if needed */
1381 val = superio_inb(sioaddr, SIO_REG_ENABLE);
1382 if (!(val & 0x01)) {
1383 pr_warn("Forcibly enabling EC access. Data may be unusable.\n");
1384 superio_outb(sioaddr, SIO_REG_ENABLE, val | 0x01);
1387 superio_exit(sioaddr);
1388 pr_info("Found %s or compatible chip at %#x:%#x\n",
1389 nct6683_chip_names[sio_data->kind], sioaddr, addr);
1390 sio_data->sioreg = sioaddr;
1395 superio_exit(sioaddr);
1400 * when Super-I/O functions move to a separate file, the Super-I/O
1401 * bus will manage the lifetime of the device and this module will only keep
1402 * track of the nct6683 driver. But since we use platform_device_alloc(), we
1403 * must keep track of the device
1405 static struct platform_device *pdev[2];
1407 static int __init sensors_nct6683_init(void)
1409 struct nct6683_sio_data sio_data;
1410 int sioaddr[2] = { 0x2e, 0x4e };
1411 struct resource res;
1416 err = platform_driver_register(&nct6683_driver);
1421 * initialize sio_data->kind and sio_data->sioreg.
1423 * when Super-I/O functions move to a separate file, the Super-I/O
1424 * driver will probe 0x2e and 0x4e and auto-detect the presence of a
1425 * nct6683 hardware monitor, and call probe()
1427 for (i = 0; i < ARRAY_SIZE(pdev); i++) {
1428 address = nct6683_find(sioaddr[i], &sio_data);
1434 pdev[i] = platform_device_alloc(DRVNAME, address);
1437 goto exit_device_unregister;
1440 err = platform_device_add_data(pdev[i], &sio_data,
1441 sizeof(struct nct6683_sio_data));
1443 goto exit_device_put;
1445 memset(&res, 0, sizeof(res));
1447 res.start = address + IOREGION_OFFSET;
1448 res.end = address + IOREGION_OFFSET + IOREGION_LENGTH - 1;
1449 res.flags = IORESOURCE_IO;
1451 err = acpi_check_resource_conflict(&res);
1453 platform_device_put(pdev[i]);
1458 err = platform_device_add_resources(pdev[i], &res, 1);
1460 goto exit_device_put;
1462 /* platform_device_add calls probe() */
1463 err = platform_device_add(pdev[i]);
1465 goto exit_device_put;
1469 goto exit_unregister;
1475 platform_device_put(pdev[i]);
1476 exit_device_unregister:
1479 platform_device_unregister(pdev[i]);
1482 platform_driver_unregister(&nct6683_driver);
1486 static void __exit sensors_nct6683_exit(void)
1490 for (i = 0; i < ARRAY_SIZE(pdev); i++) {
1492 platform_device_unregister(pdev[i]);
1494 platform_driver_unregister(&nct6683_driver);
1498 MODULE_DESCRIPTION("NCT6683D driver");
1499 MODULE_LICENSE("GPL");
1501 module_init(sensors_nct6683_init);
1502 module_exit(sensors_nct6683_exit);