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nct6687d/nct6687.c
Tomasz Moń 3e7e79c3f3
[RFC] Update cached pwm values on pwm store 
Userspace application fan2go expects written pwm value to be returned on
read after 5 ms. If the value read back then fan2go assumes that the pwm
is resolution limited and was clamped by the driver.

The nct6687d driver returns cached pwm values on reads. The cache is
updated at most once per second (unless resumed from suspend) and
therefore it leads for fan2go to falsely analyzing the pwm output as
resolution limited.

Avoid the issue by waiting for pwm value to be reported back on each
write and updating the cache immediately. On MSI PRO Z790-P WIFI
(MS-7E06) it takes around 500 ms for the pwm value (with DC mode fan
connected, so it is not a real PWM but a voltage) to be read back after
write.

Signed-off-by: Tomasz Moń <desowin@gmail.com>
2024-02-22 18:51:51 +01:00

1366 lines
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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 <frederic.boltz@gmail.com>
*
* Derived from nct6683 driver
* Copyright (C) 2013 Guenter Roeck <linux@roeck-us.net>
*
* 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>
#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))
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_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 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,
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;
char buf[64];
/* 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] = voltage;
data->voltage[2][index] = voltage;
pr_debug("nct6687_setup_voltages[%d], %s, addr=0x%04x, value=%d, voltage=%d\n", index, nct6687_voltage_label(buf, index), NCT6687_REG_VOLTAGE(index), value, voltage);
}
}
static void nct6687_setup_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) + (5 * half);
data->temperature[0][i] = temperature;
data->temperature[1][i] = temperature;
data->temperature[2][i] = temperature;
pr_debug("nct6687_setup_temperatures[%d]], addr=%04X, value=%d, half=%d, temperature=%d\n", i, NCT6687_REG_TEMP(i), value, half, temperature);
}
}
static void nct6687_setup_pwm(struct nct6687_data *data)
{
int i;
for (i = 0; i < NCT6687_NUM_REG_PWM; i++)
{
data->_initialFanPwmCommand[i] = nct6687_read(data, NCT6687_REG_FAN_PWM_COMMAND(i));
data->pwm[i] = nct6687_read(data, NCT6687_REG_PWM(i));
data->pwm_enable[i] = nct6687_get_pwm_enable(data, i);
pr_debug("nct6687_setup_pwm[%d], addr=%04X, pwm=%d, pwm_enable=%d, _initialFanPwmCommand=%d\n",
i,
NCT6687_REG_FAN_PWM_COMMAND(i),
data->pwm[i],
data->pwm_enable[i],
data->_initialFanPwmCommand[i]);
}
}
static int nct6687_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct nct6687_data *data = dev_get_drvdata(dev);
int i;
mutex_lock(&data->update_lock);
for (i = 0; i < NCT6687_NUM_REG_FAN; i++)
{
nct6687_restore_fan_control(data, i);
}
mutex_unlock(&data->update_lock);
return 0;
}
static int nct6687_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct nct6687_sio_data *sio_data = dev->platform_data;
struct attribute_group *group;
struct nct6687_data *data;
struct device *hwmon_dev;
struct resource *res;
int groups = 0;
char build[16];
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (!devm_request_region(dev, res->start, IOREGION_LENGTH, DRVNAME))
return -EBUSY;
data = devm_kzalloc(dev, sizeof(struct nct6687_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->kind = sio_data->kind;
data->sioreg = sio_data->sioreg;
data->addr = res->start;
pr_debug("nct6687_probe addr=0x%04X, sioreg=0x%04X\n", data->addr, data->sioreg);
mutex_init(&data->update_lock);
mutex_init(&data->EC_io_lock);
platform_set_drvdata(pdev, data);
nct6687_init_device(data);
nct6687_setup_fans(data);
nct6687_setup_pwm(data);
nct6687_setup_temperatures(data);
nct6687_setup_voltages(data);
/* Register sysfs hooks */
group = nct6687_create_attr_group(dev, &nct6687_pwm_template_group, NCT6687_NUM_REG_FAN);
if (IS_ERR(group))
return PTR_ERR(group);
data->groups[groups++] = group;
group = nct6687_create_attr_group(dev, &nct6687_voltage_template_group, NCT6687_NUM_REG_VOLTAGE);
if (IS_ERR(group))
return PTR_ERR(group);
data->groups[groups++] = group;
group = nct6687_create_attr_group(dev, &nct6687_fan_template_group, NCT6687_NUM_REG_FAN);
if (IS_ERR(group))
return PTR_ERR(group);
data->groups[groups++] = group;
group = nct6687_create_attr_group(dev, &nct6687_temp_template_group, NCT6687_NUM_REG_TEMP);
if (IS_ERR(group))
return PTR_ERR(group);
data->groups[groups++] = group;
scnprintf(build, sizeof(build), "%02d/%02d/%02d", nct6687_read(data, NCT6687_REG_BUILD_MONTH), nct6687_read(data, NCT6687_REG_BUILD_DAY), nct6687_read(data, NCT6687_REG_BUILD_YEAR));
dev_info(dev, "%s EC firmware version %d.%d build %s\n", nct6687_chip_names[data->kind], nct6687_read(data, NCT6687_REG_VERSION_HI), nct6687_read(data, NCT6687_REG_VERSION_LO), build);
hwmon_dev = devm_hwmon_device_register_with_groups(dev, nct6687_device_names[data->kind], data, data->groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
static int nct6687_suspend(struct platform_device *pdev, pm_message_t state)
{
struct nct6687_data *data = nct6687_update_device(&pdev->dev);
mutex_lock(&data->update_lock);
data->hwm_cfg = nct6687_read(data, NCT6687_HWM_CFG);
mutex_unlock(&data->update_lock);
return 0;
}
static int nct6687_resume(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct nct6687_data *data = dev_get_drvdata(dev);
mutex_lock(&data->update_lock);
nct6687_write(data, NCT6687_HWM_CFG, data->hwm_cfg);
/* Force re-reading all values */
data->valid = false;
mutex_unlock(&data->update_lock);
return 0;
}
// static const struct dev_pm_ops nct6687_dev_pm_ops = {
// .suspend = nct6687_suspend,
// .resume = nct6687_resume,
// .freeze = nct6687_suspend,
// .restore = nct6687_resume,
// };
#define NCT6687_DEV_PM_OPS NULL
static struct platform_driver nct6687_driver = {
.driver = {
.name = DRVNAME,
.pm = NCT6687_DEV_PM_OPS,
},
.probe = nct6687_probe,
.remove = nct6687_remove,
.suspend = nct6687_suspend,
.resume = nct6687_resume,
};
static int __init nct6687_find(int sioaddr, struct nct6687_sio_data *sio_data)
{
u16 address;
u16 verify;
u16 val;
int err;
err = superio_enter(sioaddr);
if (err)
return err;
val = (superio_inb(sioaddr, SIO_REG_DEVID) << 8) | superio_inb(sioaddr, SIO_REG_DEVREVISION);
pr_debug("found chip ID: 0x%04x\n", val);
switch (val & SIO_ID_MASK) {
case SIO_NCT6683_ID:
sio_data->kind = nct6683;
break;
case SIO_NCT6686_ID:
sio_data->kind = nct6686;
break;
case SIO_NCT6687D_ID:
case SIO_NCT6687_ID:
sio_data->kind = nct6687;
break;
default:
if (force){
sio_data->kind = nct6687;
break;
}
if (val != 0xffff)
pr_debug("unsupported chip ID: 0x%04x\n", val);
goto fail;
}
/* We have a known chip, find the HWM I/O address */
superio_select(sioaddr, NCT6687_LD_HWM);
address = (superio_inb(sioaddr, SIO_REG_ADDR) << 8) | superio_inb(sioaddr, SIO_REG_ADDR + 1);
ssleep(1);
verify = (superio_inb(sioaddr, SIO_REG_ADDR) << 8) | superio_inb(sioaddr, SIO_REG_ADDR + 1);
if (address == 0 || address != verify)
{
pr_err("EC base I/O port unconfigured\n");
goto fail;
}
if ((address & 0x07) == 0x05)
address &= 0xFFF8;
if (address < 0x100 || (address & 0xF007) != 0)
{
pr_err("EC Invalid address: 0x%04X\n", address);
goto fail;
}
/* Activate logical device if needed */
val = superio_inb(sioaddr, SIO_REG_ENABLE);
if (!(val & 0x01))
{
pr_warn("Forcibly enabling EC access. Data may be unusable.\n");
superio_outb(sioaddr, SIO_REG_ENABLE, val | 0x01);
}
superio_exit(sioaddr);
pr_info("Found %s or compatible chip at 0x%04x:0x%04x\n", nct6687_chip_names[sio_data->kind], sioaddr, address);
sio_data->sioreg = sioaddr;
return address;
fail:
superio_exit(sioaddr);
return -ENODEV;
}
/*
* when Super-I/O functions move to a separate file, the Super-I/O
* bus will manage the lifetime of the device and this module will only keep
* track of the nct6687 driver. But since we use platform_device_alloc(), we
* must keep track of the device
*/
static struct platform_device *pdev[2];
static int __init sensors_nct6687_init(void)
{
struct nct6687_sio_data sio_data;
int sioaddr[2] = {0x2e, 0x4e};
struct resource res;
bool found = false;
int address;
int i, err;
err = platform_driver_register(&nct6687_driver);
if (err)
return err;
/*
* initialize sio_data->kind and sio_data->sioreg.
*
* when Super-I/O functions move to a separate file, the Super-I/O
* driver will probe 0x2e and 0x4e and auto-detect the presence of a
* nct6687 hardware monitor, and call probe()
*/
for (i = 0; i < ARRAY_SIZE(pdev); i++)
{
address = nct6687_find(sioaddr[i], &sio_data);
if (address <= 0)
continue;
found = true;
pdev[i] = platform_device_alloc(DRVNAME, address);
if (!pdev[i])
{
err = -ENOMEM;
goto exit_device_unregister;
}
err = platform_device_add_data(pdev[i], &sio_data, sizeof(struct nct6687_sio_data));
if (err)
goto exit_device_put;
memset(&res, 0, sizeof(res));
res.name = DRVNAME;
res.start = address + IOREGION_OFFSET;
res.end = address + IOREGION_OFFSET + IOREGION_LENGTH - 1;
res.flags = IORESOURCE_IO;
err = acpi_check_resource_conflict(&res);
if (err)
{
platform_device_put(pdev[i]);
pdev[i] = NULL;
continue;
}
err = platform_device_add_resources(pdev[i], &res, 1);
if (err)
goto exit_device_put;
/* platform_device_add calls probe() */
err = platform_device_add(pdev[i]);
if (err)
goto exit_device_put;
}
if (!found)
{
err = -ENODEV;
goto exit_unregister;
}
return 0;
exit_device_put:
platform_device_put(pdev[i]);
exit_device_unregister:
while (--i >= 0)
{
if (pdev[i])
platform_device_unregister(pdev[i]);
}
exit_unregister:
platform_driver_unregister(&nct6687_driver);
return err;
}
static void __exit sensors_nct6687_exit(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(pdev); i++)
{
if (pdev[i])
platform_device_unregister(pdev[i]);
}
platform_driver_unregister(&nct6687_driver);
}
MODULE_AUTHOR("Frederic Boltz <frederic.boltz@gmail.com>");
MODULE_DESCRIPTION("Driver for NCT6687D");
MODULE_LICENSE("GPL");
module_init(sensors_nct6687_init);
module_exit(sensors_nct6687_exit);
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