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nct6687.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* nct6687 - Driver for the hardware monitoring functionality of
* Nuvoton NCT6687 Super-I/O chips
*
* Copyright (C) 2020 Frederic Boltz <[email protected]>
*
* Derived from nct6683 driver
* Copyright (C) 2013 Guenter Roeck <[email protected]>
*
* Inspired of LibreHardwareMonitor
* https://github.com/LibreHardwareMonitor/LibreHardwareMonitor
*
* Supports the following chips:
*
* Chip #voltage #fan #pwm #temp chip ID
* nct6683 14(1) 8 8 7 0xc732 (partial support)
* nct6686d 21(1) 16 8 32(1) 0xd440
* nct6687 14(1) 8 8 7 0xd592
*
* Notes:
* (1) Total number of voltage and 9 displayed.
*/
// #define DEBUG 1
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/jiffies.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#ifndef MIN
#define MIN(a,b) (((a)<(b))?(a):(b))
#endif
#ifndef MAX
#define MAX(a,b) (((a)>(b))?(a):(b))
#endif
enum kinds
{
nct6683,
nct6686,
nct6687
};
enum pwm_enable
{
manual_mode = 1,
// There are multiple automatic modes, none of which is configurable by this module yet.
firmware_mode = 99,
};
static bool force;
static bool manual;
module_param(force, bool, 0);
MODULE_PARM_DESC(force, "Set to one to enable support for unknown vendors");
module_param(manual, bool, 0);
MODULE_PARM_DESC(manual, "Set voltage input and voltage label configured with external sensors file");
static const char *const nct6687_device_names[] = {
"nct6683",
"nct6686",
"nct6687",
};
static const char *const nct6687_chip_names[] = {
"NCT6683D",
"NCT6686D",
"NCT6687D",
};
#define DRVNAME "nct6687"
/*
* Super-I/O constants and functions
*/
#define NCT6687_LD_ACPI 0x0a
#define NCT6687_LD_HWM 0x0b
#define NCT6687_LD_VID 0x0d
#define SIO_REG_LDSEL 0x07 /* Logical device select */
#define SIO_REG_DEVID 0x20 /* Device ID (2 bytes) */
#define SIO_REG_DEVREVISION 0x21 /* Device ID (2 bytes) */
#define SIO_REG_ENABLE 0x30 /* Logical device enable */
#define SIO_REG_ADDR 0x60 /* Logical device address (2 bytes) */
#define SIO_NCT6681_ID 0xb270 /* for later */
#define SIO_NCT6683_ID 0xc730
#define SIO_NCT6686_ID 0xd440
#define SIO_NCT6687D_ID 0xd450 /* NCT6687 ???*/
#define SIO_NCT6687_ID 0xd590
#define SIO_ID_MASK 0xFFF0
static inline void superio_outb(int ioreg, int reg, int val)
{
outb(reg, ioreg);
outb(val, ioreg + 1);
}
static inline int superio_inb(int ioreg, int reg)
{
outb(reg, ioreg);
return inb(ioreg + 1);
}
static inline void superio_select(int ioreg, int ld)
{
outb(SIO_REG_LDSEL, ioreg);
outb(ld, ioreg + 1);
}
static inline int superio_enter(int ioreg)
{
/*
* Try to reserve <ioreg> and <ioreg + 1> for exclusive access.
*/
if (!request_muxed_region(ioreg, 2, DRVNAME))
return -EBUSY;
outb(0x87, ioreg);
outb(0x87, ioreg);
return 0;
}
static inline void superio_exit(int ioreg)
{
outb(0xaa, ioreg);
outb(0x02, ioreg);
outb(0x02, ioreg + 1);
release_region(ioreg, 2);
}
/*
* ISA constants
*/
#define IOREGION_OFFSET 0 /* Use EC port 1 */
#define IOREGION_LENGTH 4
/* Common and NCT6687 specific data */
#define NCT6687_NUM_REG_VOLTAGE (sizeof(nct6687_voltage_definition) / sizeof(struct voltage_reg))
#define NCT6687_NUM_REG_TEMP 7
#define NCT6687_NUM_REG_FAN 8
#define NCT6687_NUM_REG_PWM 8
#define NCT6687_REG_TEMP(x) (0x100 + (x)*2)
#define NCT6687_REG_VOLTAGE(x) (0x120 + (x)*2)
#define NCT6687_REG_FAN_RPM(x) (0x140 + (x)*2)
#define NCT6687_REG_PWM(x) (0x160 + (x))
#define NCT6687_REG_PWM_WRITE(x) (0xa28 + (x))
#define NCT6687_REG_PWM_MODE 0x2F4
#define NCT6687_HWM_CFG 0x180
#define NCT6687_REG_MON_CFG(x) (0x1a0 + (x))
#define NCT6687_REG_FANIN_CFG(x) (0xA00 + (x))
#define NCT6687_REG_FANOUT_CFG(x) (0x1d0 + (x))
#define NCT6687_REG_TEMP_HYST(x) (0x330 + (x)) /* 8 bit */
#define NCT6687_REG_TEMP_MAX(x) (0x350 + (x)) /* 8 bit */
#define NCT6687_REG_MON_HIGH(x) (0x370 + (x)*2) /* 8 bit */
#define NCT6687_REG_MON_LOW(x) (0x371 + (x)*2) /* 8 bit */
#define NCT6687_REG_FAN_MIN(x) (0x3b8 + (x)*2) /* 16 bit */
#define NCT6687_REG_FAN_CTRL_MODE(x) 0xA00
#define NCT6687_REG_FAN_PWM_COMMAND(x) 0xA01
#define NCT6687_FAN_CFG_REQ 0x80
//#define NCT6687_FAN_CFG_DONE 0x40 //! for 6683 returns auto mode and clears 0xA00, 0xA28-0xA2F registers
#define NCT6687_FAN_CFG_DONE 0x00 //! tested on 6683 6687
#define NCT6687_REG_BUILD_YEAR 0x604
#define NCT6687_REG_BUILD_MONTH 0x605
#define NCT6687_REG_BUILD_DAY 0x606
#define NCT6687_REG_SERIAL 0x607
#define NCT6687_REG_VERSION_HI 0x608
#define NCT6687_REG_VERSION_LO 0x609
#define NCT6687_REG_CR_CASEOPEN 0xe8
#define NCT6687_CR_CASEOPEN_MASK (1 << 7)
#define NCT6687_REG_CR_BEEP 0xe0
#define NCT6687_CR_BEEP_MASK (1 << 6)
#define EC_SPACE_PAGE_REGISTER_OFFSET 0x04
#define EC_SPACE_INDEX_REGISTER_OFFSET 0x05
#define EC_SPACE_DATA_REGISTER_OFFSET 0x06
#define EC_SPACE_PAGE_SELECT 0xFF
struct voltage_reg
{
u16 reg;
u16 multiplier;
const char *label;
};
static struct voltage_reg nct6687_voltage_definition[] = {
// +12V
{
.reg = 0,
.multiplier = 12,
.label = "+12V",
},
// + 5V
{
.reg = 1,
.multiplier = 5,
.label = "+5V",
},
// +3.3V
{
.reg = 11,
.multiplier = 1,
.label = "+3.3V",
},
// CPU SOC
{
.reg = 2,
.multiplier = 1,
.label = "CPU Soc",
},
// CPU Vcore
{
.reg = 4,
.multiplier = 1,
.label = "CPU Vcore",
},
// CPU 1P8
{
.reg = 9,
.multiplier = 1,
.label = "CPU 1P8",
},
// CPU VDDP
{
.reg = 10,
.multiplier = 1,
.label = "CPU VDDP",
},
// DRAM
{
.reg = 3,
.multiplier = 2,
.label = "DRAM",
},
// Chipset
{
.reg = 5,
.multiplier = 1,
.label = "Chipset",
},
// CPU SA
{
.reg = 6,
.multiplier = 1,
.label = "CPU SA",
},
// Voltage #2
{
.reg = 7,
.multiplier = 1,
.label = "Voltage #2",
},
// AVCC3
{
.reg = 8,
.multiplier = 1,
.label = "AVCC3",
},
// AVSB
{
.reg = 12,
.multiplier = 1,
.label = "AVSB",
},
// VBAT
{
.reg = 13,
.multiplier = 1,
.label = "VBat",
},
};
static const char *const nct6687_temp_label[] = {
"CPU",
"System",
"VRM MOS",
"PCH",
"CPU Socket",
"PCIe x1",
"M2_1",
NULL,
};
static const char *const nct6687_fan_label[] = {
"CPU Fan",
"Pump Fan",
"System Fan #1",
"System Fan #2",
"System Fan #3",
"System Fan #4",
"System Fan #5",
"System Fan #6",
NULL,
};
/* ------------------------------------------------------- */
struct nct6687_data
{
int addr; /* IO base of EC space */
int sioreg; /* SIO register */
enum kinds kind;
struct device *hwmon_dev;
const struct attribute_group *groups[6];
struct mutex update_lock; /* used to protect sensor updates */
struct mutex EC_io_lock; /* used to protect EC io */
bool valid; /* true if following fields are valid */
unsigned long last_updated; /* In jiffies */
/* Voltage values */
s16 voltage[3][NCT6687_NUM_REG_VOLTAGE]; // 0 = current 1 = min 2 = max
/* Temperature values */
s32 temperature[3][NCT6687_NUM_REG_TEMP]; // 0 = current 1 = min 2 = max
/* Fan attribute values */
u16 rpm[3][NCT6687_NUM_REG_FAN]; // 0 = current 1 = min 2 = max
u8 _initialFanControlMode[NCT6687_NUM_REG_FAN];
u8 _initialFanPwmCommand[NCT6687_NUM_REG_FAN];
bool _restoreDefaultFanControlRequired[NCT6687_NUM_REG_FAN];
u8 pwm[NCT6687_NUM_REG_PWM];
enum pwm_enable pwm_enable[NCT6687_NUM_REG_PWM];
/* Remember extra register values over suspend/resume */
u8 hwm_cfg;
};
struct nct6687_sio_data
{
int sioreg;
enum kinds kind;
};
struct sensor_device_template
{
struct device_attribute dev_attr;
union
{
struct
{
u8 nr;
u8 index;
} s;
int index;
} u;
bool s2; /* true if both index and nr are used */
};
struct sensor_device_attr_u
{
union
{
struct sensor_device_attribute a1;
struct sensor_device_attribute_2 a2;
} u;
char name[32];
};
#define __TEMPLATE_ATTR(_template, _mode, _show, _store) \
{ \
.attr = {.name = _template, .mode = _mode}, \
.show = _show, \
.store = _store, \
}
#define SENSOR_DEVICE_TEMPLATE(_template, _mode, _show, _store, _index) \
{ \
.dev_attr = __TEMPLATE_ATTR(_template, _mode, _show, _store), \
.u.index = _index, \
.s2 = false \
}
#define SENSOR_DEVICE_TEMPLATE_2(_template, _mode, _show, _store, \
_nr, _index) \
{ \
.dev_attr = __TEMPLATE_ATTR(_template, _mode, _show, _store), \
.u.s.index = _index, \
.u.s.nr = _nr, \
.s2 = true \
}
#define SENSOR_TEMPLATE(_name, _template, _mode, _show, _store, _index) \
static struct sensor_device_template sensor_dev_template_##_name = SENSOR_DEVICE_TEMPLATE(_template, _mode, _show, _store, \
_index)
#define SENSOR_TEMPLATE_2(_name, _template, _mode, _show, _store, \
_nr, _index) \
static struct sensor_device_template sensor_dev_template_##_name = SENSOR_DEVICE_TEMPLATE_2(_template, _mode, _show, _store, \
_nr, _index)
struct sensor_template_group
{
struct sensor_device_template **templates;
umode_t (*is_visible)(struct kobject *, struct attribute *, int);
int base;
};
static void nct6687_save_fan_control(struct nct6687_data *data, int index);
static const char* nct6687_voltage_label(char* buf, int index)
{
if (manual)
sprintf(buf, "in%d", index);
else
strcpy(buf, nct6687_voltage_definition[index].label);
return buf;
}
static struct attribute_group *nct6687_create_attr_group(struct device *dev, const struct sensor_template_group *tg, int repeat)
{
struct sensor_device_attribute_2 *a2;
struct sensor_device_attribute *a;
struct sensor_device_template **t;
struct sensor_device_attr_u *su;
struct attribute_group *group;
struct attribute **attrs;
int i, j, count;
if (repeat <= 0)
return ERR_PTR(-EINVAL);
t = tg->templates;
for (count = 0; *t; t++, count++)
;
if (count == 0)
return ERR_PTR(-EINVAL);
group = devm_kzalloc(dev, sizeof(*group), GFP_KERNEL);
if (group == NULL)
return ERR_PTR(-ENOMEM);
attrs = devm_kcalloc(dev, repeat * count + 1, sizeof(*attrs), GFP_KERNEL);
if (attrs == NULL)
return ERR_PTR(-ENOMEM);
su = devm_kzalloc(dev, array3_size(repeat, count, sizeof(*su)), GFP_KERNEL);
if (su == NULL)
return ERR_PTR(-ENOMEM);
group->attrs = attrs;
group->is_visible = tg->is_visible;
for (i = 0; i < repeat; i++)
{
t = tg->templates;
for (j = 0; *t != NULL; j++)
{
snprintf(su->name, sizeof(su->name), (*t)->dev_attr.attr.name, tg->base + i);
if ((*t)->s2)
{
a2 = &su->u.a2;
sysfs_attr_init(&a2->dev_attr.attr);
a2->dev_attr.attr.name = su->name;
a2->nr = (*t)->u.s.nr + i;
a2->index = (*t)->u.s.index;
a2->dev_attr.attr.mode = (*t)->dev_attr.attr.mode;
a2->dev_attr.show = (*t)->dev_attr.show;
a2->dev_attr.store = (*t)->dev_attr.store;
*attrs = &a2->dev_attr.attr;
}
else
{
a = &su->u.a1;
sysfs_attr_init(&a->dev_attr.attr);
a->dev_attr.attr.name = su->name;
a->index = (*t)->u.index + i;
a->dev_attr.attr.mode = (*t)->dev_attr.attr.mode;
a->dev_attr.show = (*t)->dev_attr.show;
a->dev_attr.store = (*t)->dev_attr.store;
*attrs = &a->dev_attr.attr;
}
attrs++;
su++;
t++;
}
}
return group;
}
static u16 nct6687_read(struct nct6687_data *data, u16 address)
{
u8 page = (u8)(address >> 8);
u8 index = (u8)(address & 0xFF);
int res;
mutex_lock(&data->EC_io_lock);
outb_p(EC_SPACE_PAGE_SELECT, data->addr + EC_SPACE_PAGE_REGISTER_OFFSET);
outb_p(page, data->addr + EC_SPACE_PAGE_REGISTER_OFFSET);
outb_p(index, data->addr + EC_SPACE_INDEX_REGISTER_OFFSET);
mutex_unlock(&data->EC_io_lock);
res = inb_p(data->addr + EC_SPACE_DATA_REGISTER_OFFSET);
return res;
}
static u16 nct6687_read16(struct nct6687_data *data, u16 reg)
{
return (nct6687_read(data, reg) << 8) | nct6687_read(data, reg + 1);
}
static void nct6687_write(struct nct6687_data *data, u16 address, u16 value)
{
u8 page = (u8)(address >> 8);
u8 index = (u8)(address & 0xFF);
mutex_lock(&data->EC_io_lock);
outb_p(EC_SPACE_PAGE_SELECT, data->addr + EC_SPACE_PAGE_REGISTER_OFFSET);
outb_p(page, data->addr + EC_SPACE_PAGE_REGISTER_OFFSET);
outb_p(index, data->addr + EC_SPACE_INDEX_REGISTER_OFFSET);
outb_p(value, data->addr + EC_SPACE_DATA_REGISTER_OFFSET);
mutex_unlock(&data->EC_io_lock);
}
static void nct6687_update_temperatures(struct nct6687_data *data)
{
int i;
for (i = 0; i < NCT6687_NUM_REG_TEMP; i++)
{
s32 value = (char)nct6687_read(data, NCT6687_REG_TEMP(i));
s32 half = (nct6687_read(data, NCT6687_REG_TEMP(i) + 1) >> 7) & 0x1;
s32 temperature = (value * 1000) + (500 * half);
data->temperature[0][i] = temperature;
data->temperature[1][i] = MIN(temperature, data->temperature[1][i]);
data->temperature[2][i] = MAX(temperature, data->temperature[2][i]);
pr_debug("nct6687_update_temperatures[%d]], addr=%04X, value=%d, half=%d, temperature=%d\n", i, NCT6687_REG_TEMP(i), value, half, temperature);
}
}
static void nct6687_update_voltage(struct nct6687_data *data)
{
int index;
char buf[128];
/* Measured voltages and limits */
for (index = 0; index < NCT6687_NUM_REG_VOLTAGE; index++)
{
s16 reg = manual ? index : nct6687_voltage_definition[index].reg;
s16 high = nct6687_read(data, NCT6687_REG_VOLTAGE(reg)) * 16;
s16 low = ((u16)nct6687_read(data, NCT6687_REG_VOLTAGE(reg) + 1)) >> 4;
s16 value = low + high;
s16 voltage = manual ? value : value * nct6687_voltage_definition[index].multiplier;
data->voltage[0][index] = voltage;
data->voltage[1][index] = MIN(voltage, data->voltage[1][index]);
data->voltage[2][index] = MAX(voltage, data->voltage[2][index]);
pr_debug("nct6687_update_voltage[%d], %s, reg=%d, addr=0x%04x, value=%d, voltage=%d\n", index, nct6687_voltage_label(buf, index), reg, NCT6687_REG_VOLTAGE(index), value, voltage);
}
pr_debug("nct6687_update_voltage\n");
}
static enum pwm_enable nct6687_get_pwm_enable(struct nct6687_data *data, int index)
{
u16 bitMask = 0x01 << index;
if (nct6687_read(data, NCT6687_REG_FAN_CTRL_MODE(index)) & bitMask)
{
return manual_mode;
}
return firmware_mode;
}
static void nct6687_update_fans(struct nct6687_data *data)
{
int i;
for (i = 0; i < NCT6687_NUM_REG_FAN; i++)
{
s16 rmp = nct6687_read16(data, NCT6687_REG_FAN_RPM(i));
data->rpm[0][i] = rmp;
data->rpm[1][i] = MIN(rmp, data->rpm[1][i]);
data->rpm[2][i] = MAX(rmp, data->rpm[2][i]);
pr_debug("nct6687_update_fans[%d], rpm=%d min=%d, max=%d", i, rmp, data->rpm[1][i], data->rpm[2][i]);
}
for (i = 0; i < NCT6687_NUM_REG_PWM; i++)
{
data->pwm[i] = nct6687_read(data, NCT6687_REG_PWM(i));
data->pwm_enable[i] = nct6687_get_pwm_enable(data, i);
pr_debug("nct6687_update_fans[%d], pwm=%d", i, data->pwm[i]);
}
}
static struct nct6687_data *nct6687_update_device(struct device *dev)
{
struct nct6687_data *data = dev_get_drvdata(dev);
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ) || !data->valid)
{
/* Measured voltages and limits */
nct6687_update_voltage(data);
/* Measured temperatures and limits */
nct6687_update_temperatures(data);
/* Measured fan speeds and limits */
nct6687_update_fans(data);
data->last_updated = jiffies;
data->valid = true;
}
mutex_unlock(&data->update_lock);
return data;
}
/*
* Sysfs callback functions
*/
static ssize_t show_voltage_label(struct device *dev, struct device_attribute *attr, char *buf)
{
struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
if (manual)
return sprintf(buf, "in%d\n", sattr->index);
else
return sprintf(buf, "%s\n", nct6687_voltage_definition[sattr->index].label);
}
static ssize_t show_voltage_value(struct device *dev, struct device_attribute *attr, char *buf)
{
struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
struct nct6687_data *data = nct6687_update_device(dev);
return sprintf(buf, "%d\n", data->voltage[sattr->index][sattr->nr]);
}
static umode_t nct6687_voltage_is_visible(struct kobject *kobj, struct attribute *attr, int index)
{
pr_debug("nct6687_voltage_is_visible[%d], attr=0x%04X\n", index, attr->mode);
return attr->mode;
}
SENSOR_TEMPLATE(voltage_label, "in%d_label", S_IRUGO, show_voltage_label, NULL, 0);
SENSOR_TEMPLATE_2(voltage_input, "in%d_input", S_IRUGO, show_voltage_value, NULL, 0, 0);
SENSOR_TEMPLATE_2(voltage_min, "in%d_min", S_IRUGO, show_voltage_value, NULL, 0, 1);
SENSOR_TEMPLATE_2(voltage_max, "in%d_max", S_IRUGO, show_voltage_value, NULL, 0, 2);
static struct sensor_device_template *nct6687_attributes_voltage_template[] = {
&sensor_dev_template_voltage_label,
&sensor_dev_template_voltage_input,
&sensor_dev_template_voltage_min,
&sensor_dev_template_voltage_max,
NULL,
};
static const struct sensor_template_group nct6687_voltage_template_group = {
.templates = nct6687_attributes_voltage_template,
.is_visible = nct6687_voltage_is_visible,
};
static ssize_t show_fan_label(struct device *dev, struct device_attribute *attr, char *buf)
{
struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
return sprintf(buf, "%s\n", nct6687_fan_label[sattr->index]);
}
static ssize_t show_fan_value(struct device *dev, struct device_attribute *attr, char *buf)
{
struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
struct nct6687_data *data = nct6687_update_device(dev);
return sprintf(buf, "%d\n", data->rpm[sattr->index][sattr->nr]);
}
static umode_t nct6687_fan_is_visible(struct kobject *kobj, struct attribute *attr, int index)
{
return attr->mode;
}
SENSOR_TEMPLATE(fan_label, "fan%d_label", S_IRUGO, show_fan_label, NULL, 0);
SENSOR_TEMPLATE_2(fan_input, "fan%d_input", S_IRUGO, show_fan_value, NULL, 0, 0);
SENSOR_TEMPLATE_2(fan_min, "fan%d_min", S_IRUGO, show_fan_value, NULL, 0, 1);
SENSOR_TEMPLATE_2(fan_max, "fan%d_max", S_IRUGO, show_fan_value, NULL, 0, 2);
/*
* nct6687_fan_is_visible uses the index into the following array
* to determine if attributes should be created or not.
* Any change in order or content must be matched.
*/
static struct sensor_device_template *nct6687_attributes_fan_template[] = {
&sensor_dev_template_fan_label,
&sensor_dev_template_fan_input,
&sensor_dev_template_fan_min,
&sensor_dev_template_fan_max,
NULL,
};
static const struct sensor_template_group nct6687_fan_template_group = {
.templates = nct6687_attributes_fan_template,
.is_visible = nct6687_fan_is_visible,
.base = 1,
};
static ssize_t show_temperature_label(struct device *dev, struct device_attribute *attr, char *buf)
{
struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
return sprintf(buf, "%s\n", nct6687_temp_label[sattr->index]);
}
static ssize_t show_temperature_value(struct device *dev, struct device_attribute *attr, char *buf)
{
struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
struct nct6687_data *data = nct6687_update_device(dev);
return sprintf(buf, "%d\n", data->temperature[sattr->index][sattr->nr]);
}
static umode_t nct6687_temp_is_visible(struct kobject *kobj, struct attribute *attr, int index)
{
return attr->mode;
}
SENSOR_TEMPLATE(temp_label, "temp%d_label", S_IRUGO, show_temperature_label, NULL, 0);
SENSOR_TEMPLATE_2(temp_input, "temp%d_input", S_IRUGO, show_temperature_value, NULL, 0, 0);
SENSOR_TEMPLATE_2(temp_min, "temp%d_min", S_IRUGO, show_temperature_value, NULL, 0, 1);
SENSOR_TEMPLATE_2(temp_max, "temp%d_max", S_IRUGO, show_temperature_value, NULL, 0, 2);
/*
* nct6687_temp_is_visible uses the index into the following array
* to determine if attributes should be created or not.
* Any change in order or content must be matched.
*/
static struct sensor_device_template *nct6687_attributes_temp_template[] = {
&sensor_dev_template_temp_input,
&sensor_dev_template_temp_label,
&sensor_dev_template_temp_min,
&sensor_dev_template_temp_max,
NULL,
};
static const struct sensor_template_group nct6687_temp_template_group = {
.templates = nct6687_attributes_temp_template,
.is_visible = nct6687_temp_is_visible,
.base = 1,
};
static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
{
struct nct6687_data *data = nct6687_update_device(dev);
struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
int index = sattr->index;
return sprintf(buf, "%d\n", data->pwm[index]);
}
static ssize_t store_pwm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
struct nct6687_data *data = dev_get_drvdata(dev);
int index = sattr->index;
unsigned long val;
int retry;
u16 readback;
u16 mode;
u8 bitMask;
if (kstrtoul(buf, 10, &val) || val > 255 || index >= NCT6687_NUM_REG_FAN)
return -EINVAL;
mutex_lock(&data->update_lock);
nct6687_save_fan_control(data, index);
mode = nct6687_read(data, NCT6687_REG_FAN_CTRL_MODE(index));
bitMask = (u8)(0x01 << index);
mode = (u8)(mode | bitMask);
nct6687_write(data, NCT6687_REG_FAN_CTRL_MODE(index), mode);
nct6687_write(data, NCT6687_REG_FAN_PWM_COMMAND(index), NCT6687_FAN_CFG_REQ);
msleep(50);
nct6687_write(data, NCT6687_REG_PWM_WRITE(index), val);
nct6687_write(data, NCT6687_REG_FAN_PWM_COMMAND(index), NCT6687_FAN_CFG_DONE);
for (retry = 0; retry < 20; retry++) {
msleep(50);
readback = nct6687_read(data, NCT6687_REG_PWM(index));
if (readback == val)
break;
}
data->pwm[index] = readback;
data->pwm_enable[index] = nct6687_get_pwm_enable(data, index);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_pwm_enable(struct device *dev, struct device_attribute *attr, char *buf)
{
struct nct6687_data *data = nct6687_update_device(dev);
struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
return sprintf(buf, "%d\n", data->pwm_enable[sattr->nr]);
}
static ssize_t store_pwm_enable(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
struct nct6687_data *data = dev_get_drvdata(dev);
int index = sattr->nr;
unsigned long val;
u16 mode;
u8 bitMask;
if (index >= NCT6687_NUM_REG_FAN || kstrtoul(buf, 10, &val))
return -EINVAL;
if (val != manual_mode && val != firmware_mode)
return -EINVAL;
mutex_lock(&data->update_lock);
nct6687_save_fan_control(data, index);
mode = nct6687_read(data, NCT6687_REG_FAN_CTRL_MODE(index));
bitMask = (u8)(0x01 << index);
if (val == manual_mode)
{
mode = (u8)(mode | bitMask);
}
else if (val == firmware_mode)
{
mode = (u8)(mode & ~bitMask);
}
nct6687_write(data, NCT6687_REG_FAN_CTRL_MODE(index), mode);
mutex_unlock(&data->update_lock);
return count;
}
SENSOR_TEMPLATE(pwm, "pwm%d", S_IRUGO, show_pwm, store_pwm, 0);
SENSOR_TEMPLATE_2(pwm_enable, "pwm%d_enable", S_IRUGO, show_pwm_enable, store_pwm_enable, 0, 0);
static void nct6687_save_fan_control(struct nct6687_data *data, int index)
{
if (data->_restoreDefaultFanControlRequired[index] == false)
{
u16 reg = nct6687_read(data, NCT6687_REG_FAN_CTRL_MODE(index));
u16 bitMask = 0x01 << index;
u8 pwm = nct6687_read(data, NCT6687_REG_FAN_PWM_COMMAND(index));
data->_initialFanControlMode[index] = (u8)(reg & bitMask);
data->_initialFanPwmCommand[index] = pwm;
data->_restoreDefaultFanControlRequired[index] = true;
}
}
static void nct6687_restore_fan_control(struct nct6687_data *data, int index)
{
if (data->_restoreDefaultFanControlRequired[index])
{
u8 mode = nct6687_read(data, NCT6687_REG_FAN_CTRL_MODE(index));
u8 bitMask = 0x01 << index;
mode = (u8)((mode & ~bitMask) | data->_initialFanControlMode[index]);
nct6687_write(data, NCT6687_REG_FAN_CTRL_MODE(index), mode);
nct6687_write(data, NCT6687_REG_FAN_PWM_COMMAND(index), NCT6687_FAN_CFG_REQ);
msleep(50);
nct6687_write(data, NCT6687_REG_PWM_WRITE(index), data->_initialFanPwmCommand[index]);
nct6687_write(data, NCT6687_REG_FAN_PWM_COMMAND(index), NCT6687_FAN_CFG_DONE);
msleep(50);
data->_restoreDefaultFanControlRequired[index] = false;
pr_debug("nct6687_restore_fan_control[%d], addr=%04X, ctrl=%04X, _initialFanPwmCommand=%d\n", index, NCT6687_REG_FAN_PWM_COMMAND(index), NCT6687_REG_PWM_WRITE(index), data->_initialFanPwmCommand[index]);
}
}
static ssize_t show_pwm_mode(struct device *dev, struct device_attribute *attr, char *buf)
{
u16 mode;
u8 pwm_mode; //one bit
struct nct6687_data *data = nct6687_update_device(dev);
struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
int index = sattr->index;
mode = nct6687_read(data, NCT6687_REG_PWM_MODE);
pwm_mode = (u8)( (mode >> index)&0x01);
return sprintf(buf, "%d\n", pwm_mode);
}
SENSOR_TEMPLATE(pwm_mode, "pwm%d_mode", S_IRUGO, show_pwm_mode, NULL, 0);
static umode_t nct6687_pwm_is_visible(struct kobject *kobj, struct attribute *attr, int index)
{
return attr->mode | S_IWUSR;
}
static struct sensor_device_template *nct6687_attributes_pwm_template[] = {
&sensor_dev_template_pwm,
&sensor_dev_template_pwm_enable,
&sensor_dev_template_pwm_mode,
NULL,
};
static const struct sensor_template_group nct6687_pwm_template_group = {
.templates = nct6687_attributes_pwm_template,
.is_visible = nct6687_pwm_is_visible,
.base = 1,
};
/* Get the monitoring functions started */
static inline void nct6687_init_device(struct nct6687_data *data)
{
u8 tmp;
pr_debug("nct6687_init_device\n");
/* Start hardware monitoring if needed */
tmp = nct6687_read(data, NCT6687_HWM_CFG);
if (!(tmp & 0x80))
{
pr_debug("nct6687_init_device: 0x%04x\n", tmp);
nct6687_write(data, NCT6687_HWM_CFG, tmp | 0x80);
}
// enable SIO voltage
nct6687_write(data, 0x1BB, 0x61);
nct6687_write(data, 0x1BC, 0x62);
nct6687_write(data, 0x1BD, 0x63);
nct6687_write(data, 0x1BE, 0x64);
nct6687_write(data, 0x1BF, 0x65);
}
/*
* There are a total of 8 fan inputs.
*/
static void nct6687_setup_fans(struct nct6687_data *data)
{
int i;
for (i = 0; i < NCT6687_NUM_REG_FAN; i++)
{
u16 reg = nct6687_read(data, NCT6687_REG_FAN_CTRL_MODE(i));
u16 bitMask = 0x01 << i;
u16 rpm = nct6687_read16(data, NCT6687_REG_FAN_RPM(i));
data->rpm[0][i] = rpm;
data->rpm[1][i] = rpm;
data->rpm[2][i] = rpm;
data->_initialFanControlMode[i] = (u8)(reg & bitMask);
data->_restoreDefaultFanControlRequired[i] = false;
pr_debug("nct6687_setup_fans[%d], %s - addr=%04X, ctrl=%04X, rpm=%d, _initialFanControlMode=%d\n", i, nct6687_fan_label[i], NCT6687_REG_FAN_CTRL_MODE(i), reg, rpm, data->_initialFanControlMode[i]);
}
}
static void nct6687_setup_voltages(struct nct6687_data *data)
{
int index;