/*
* nct6775 - Driver for the hardware monitoring functionality of
* Nuvoton NCT677x Super-I/O chips
*
* Copyright (C) 2012 Guenter Roeck <linux@roeck-us.net>
*
* Derived from w83627ehf driver
* Copyright (C) 2005-2012 Jean Delvare <khali@linux-fr.org>
* Copyright (C) 2006 Yuan Mu (Winbond),
* Rudolf Marek <r.marek@assembler.cz>
* David Hubbard <david.c.hubbard@gmail.com>
* Daniel J Blueman <daniel.blueman@gmail.com>
* Copyright (C) 2010 Sheng-Yuan Huang (Nuvoton) (PS00)
*
* Shamelessly ripped from the w83627hf driver
* Copyright (C) 2003 Mark Studebaker
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
* Supports the following chips:
*
* Chip #vin #fan #pwm #temp chip IDs man ID
* nct6775f 9 4 3 6+3 0xb470 0xc1 0x5ca3
* nct6776f 9 5 3 6+3 0xc330 0xc1 0x5ca3
* nct6779d 15 5 5 2+6 0xc560 0xc1 0x5ca3
*
* #temp lists the number of monitored temperature sources (first value) plus
* the number of directly connectable temperature sensors (second value).
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/hwmon-vid.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/acpi.h>
#include <linux/io.h>
#include "lm75.h"
enum kinds { nct6775, nct6776, nct6779 };
/* used to set data->name = nct6775_device_names[data->sio_kind] */
static const char * const nct6775_device_names[] = {
"nct6775",
"nct6776",
"nct6779",
};
static unsigned short force_id;
module_param(force_id, ushort, 0);
MODULE_PARM_DESC(force_id, "Override the detected device ID");
#define DRVNAME "nct6775"
/*
* Super-I/O constants and functions
*/
#define NCT6775_LD_ACPI 0x0a
#define NCT6775_LD_HWM 0x0b
#define NCT6775_LD_VID 0x0d
#define SIO_REG_LDSEL 0x07 /* Logical device select */
#define SIO_REG_DEVID 0x20 /* Device ID (2 bytes) */
#define SIO_REG_ENABLE 0x30 /* Logical device enable */
#define SIO_REG_ADDR 0x60 /* Logical device address (2 bytes) */
#define SIO_NCT6775_ID 0xb470
#define SIO_NCT6776_ID 0xc330
#define SIO_NCT6779_ID 0xc560
#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_ALIGNMENT (~7)
#define IOREGION_OFFSET 5
#define IOREGION_LENGTH 2
#define ADDR_REG_OFFSET 0
#define DATA_REG_OFFSET 1
#define NCT6775_REG_BANK 0x4E
#define NCT6775_REG_CONFIG 0x40
/*
* Not currently used:
* REG_MAN_ID has the value 0x5ca3 for all supported chips.
* REG_CHIP_ID == 0x88/0xa1/0xc1 depending on chip model.
* REG_MAN_ID is at port 0x4f
* REG_CHIP_ID is at port 0x58
*/
#define NUM_REG_ALARM 4 /* Max number of alarm registers */
/* Common and NCT6775 specific data */
/* Voltage min/max registers for nr=7..14 are in bank 5 */
static const u16 NCT6775_REG_IN_MAX[] = {
0x2b, 0x2d, 0x2f, 0x31, 0x33, 0x35, 0x37, 0x554, 0x556, 0x558, 0x55a,
0x55c, 0x55e, 0x560, 0x562 };
static const u16 NCT6775_REG_IN_MIN[] = {
0x2c, 0x2e, 0x30, 0x32, 0x34, 0x36, 0x38, 0x555, 0x557, 0x559, 0x55b,
0x55d, 0x55f, 0x561, 0x563 };
static const u16 NCT6775_REG_IN[] = {
0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x550, 0x551, 0x552
};
#define NCT6775_REG_VBAT 0x5D
static const u16 NCT6775_REG_ALARM[NUM_REG_ALARM] = { 0x459, 0x45A, 0x45B };
/* 0..15 voltages, 16..23 fans, 24..31 temperatures */
static const s8 NCT6775_ALARM_BITS[] = {
0, 1, 2, 3, 8, 21, 20, 16, /* in0.. in7 */
17, -1, -1, -1, -1, -1, -1, /* in8..in14 */
-1, /* unused */
6, 7, 11, 10, 23, /* fan1..fan5 */
-1, -1, -1, /* unused */
4, 5, 13, -1, -1, -1, /* temp1..temp6 */
12, -1 }; /* intrusion0, intrusion1 */
#define INTRUSION_ALARM_BASE 30
static const u8 NCT6775_REG_CR_CASEOPEN_CLR[] = { 0xe6, 0xee };
static const u8 NCT6775_CR_CASEOPEN_CLR_MASK[] = { 0x20, 0x01 };
/* NCT6776 specific data */
static const s8 NCT6776_ALARM_BITS[] = {
0, 1, 2, 3, 8, 21, 20, 16, /* in0.. in7 */
17, -1, -1, -1, -1, -1, -1, /* in8..in14 */
-1, /* unused */
6, 7, 11, 10, 23, /* fan1..fan5 */
-1, -1, -1, /* unused */
4, 5, 13, -1, -1, -1, /* temp1..temp6 */
12, 9 }; /* intrusion0, intrusion1 */
/* NCT6779 specific data */
static const u16 NCT6779_REG_IN[] = {
0x480, 0x481, 0x482, 0x483, 0x484, 0x485, 0x486, 0x487,
0x488, 0x489, 0x48a, 0x48b, 0x48c, 0x48d, 0x48e };
static const u16 NCT6779_REG_ALARM[NUM_REG_ALARM] = {
0x459, 0x45A, 0x45B, 0x568 };
static const s8 NCT6779_ALARM_BITS[] = {
0, 1, 2, 3, 8, 21, 20, 16, /* in0.. in7 */
17, 24, 25, 26, 27, 28, 29, /* in8..in14 */
-1, /* unused */
6, 7, 11, 10, 23, /* fan1..fan5 */
-1, -1, -1, /* unused */
4, 5, 13, -1, -1, -1, /* temp1..temp6 */
12, 9 }; /* intrusion0, intrusion1 */
/*
* Conversions
*/
/*
* Some of the voltage inputs have internal scaling, the tables below
* contain 8 (the ADC LSB in mV) * scaling factor * 100
*/
static const u16 scale_in[15] = {
800, 800, 1600, 1600, 800, 800, 800, 1600, 1600, 800, 800, 800, 800,
800, 800
};
static inline long in_from_reg(u8 reg, u8 nr)
{
return DIV_ROUND_CLOSEST(reg * scale_in[nr], 100);
}
static inline u8 in_to_reg(u32 val, u8 nr)
{
return clamp_val(DIV_ROUND_CLOSEST(val * 100, scale_in[nr]), 0, 255);
}
/*
* Data structures and manipulation thereof
*/
struct nct6775_data {
int addr; /* IO base of hw monitor block */
enum kinds kind;
const char *name;
struct device *hwmon_dev;
struct mutex lock;
u16 REG_CONFIG;
u16 REG_VBAT;
const s8 *ALARM_BITS;
const u16 *REG_VIN;
const u16 *REG_IN_MINMAX[2];
const u16 *REG_ALARM;
struct mutex update_lock;
bool valid; /* true if following fields are valid */
unsigned long last_updated; /* In jiffies */
/* Register values */
u8 bank; /* current register bank */
u8 in_num; /* number of in inputs we have */
u8 in[15][3]; /* [0]=in, [1]=in_max, [2]=in_min */
u64 alarms;
u8 vid;
u8 vrm;
u16 have_in;
};
struct nct6775_sio_data {
int sioreg;
enum kinds kind;
};
static bool is_word_sized(struct nct6775_data *data, u16 reg)
{
switch (data->kind) {
case nct6775:
return (((reg & 0xff00) == 0x100 ||
(reg & 0xff00) == 0x200) &&
((reg & 0x00ff) == 0x50 ||
(reg & 0x00ff) == 0x53 ||
(reg & 0x00ff) == 0x55)) ||
(reg & 0xfff0) == 0x630 ||
reg == 0x640 || reg == 0x642 ||
reg == 0x662 ||
((reg & 0xfff0) == 0x650 && (reg & 0x000f) >= 0x06) ||
reg == 0x73 || reg == 0x75 || reg == 0x77;
case nct6776:
return (((reg & 0xff00) == 0x100 ||
(reg & 0xff00) == 0x200) &&
((reg & 0x00ff) == 0x50 ||
(reg & 0x00ff) == 0x53 ||
(reg & 0x00ff) == 0x55)) ||
(reg & 0xfff0) == 0x630 ||
reg == 0x402 ||
reg == 0x640 || reg == 0x642 ||
((reg & 0xfff0) == 0x650 && (reg & 0x000f) >= 0x06) ||
reg == 0x73 || reg == 0x75 || reg == 0x77;
case nct6779:
return reg == 0x150 || reg == 0x153 || reg == 0x155 ||
((reg & 0xfff0) == 0x4b0 && (reg & 0x000f) < 0x09) ||
reg == 0x402 ||
reg == 0x63a || reg == 0x63c || reg == 0x63e ||
reg == 0x640 || reg == 0x642 ||
reg == 0x73 || reg == 0x75 || reg == 0x77 || reg == 0x79 ||
reg == 0x7b;
}
return false;
}
/*
* On older chips, only registers 0x50-0x5f are banked.
* On more recent chips, all registers are banked.
* Assume that is the case and set the bank number for each access.
* Cache the bank number so it only needs to be set if it changes.
*/
static inline void nct6775_set_bank(struct nct6775_data *data, u16 reg)
{
u8 bank = reg >> 8;
if (data->bank != bank) {
outb_p(NCT6775_REG_BANK, data->addr + ADDR_REG_OFFSET);
outb_p(bank, data->addr + DATA_REG_OFFSET);
data->bank = bank;
}
}
static u16 nct6775_read_value(struct nct6775_data *data, u16 reg)
{
int res, word_sized = is_word_sized(data, reg);
mutex_lock(&data->lock);
nct6775_set_bank(data, reg);
outb_p(reg & 0xff, data->addr + ADDR_REG_OFFSET);
res = inb_p(data->addr + DATA_REG_OFFSET);
if (word_sized) {
outb_p((reg & 0xff) + 1,
data->addr + ADDR_REG_OFFSET);
res = (res << 8) + inb_p(data->addr + DATA_REG_OFFSET);
}
mutex_unlock(&data->lock);
return res;
}
static int nct6775_write_value(struct nct6775_data *data, u16 reg, u16 value)
{
int word_sized = is_word_sized(data, reg);
mutex_lock(&data->lock);
nct6775_set_bank(data, reg);
outb_p(reg & 0xff, data->addr + ADDR_REG_OFFSET);
if (word_sized) {
outb_p(value >> 8, data->addr + DATA_REG_OFFSET);
outb_p((reg & 0xff) + 1,
data->addr + ADDR_REG_OFFSET);
}
outb_p(value & 0xff, data->addr + DATA_REG_OFFSET);
mutex_unlock(&data->lock);
return 0;
}
static struct nct6775_data *nct6775_update_device(struct device *dev)
{
struct nct6775_data *data = dev_get_drvdata(dev);
int i;
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ + HZ/2)
|| !data->valid) {
/* Measured voltages and limits */
for (i = 0; i < data->in_num; i++) {
if (!(data->have_in & (1 << i)))
continue;
data->in[i][0] = nct6775_read_value(data,
data->REG_VIN[i]);
data->in[i][1] = nct6775_read_value(data,
data->REG_IN_MINMAX[0][i]);
data->in[i][2] = nct6775_read_value(data,
data->REG_IN_MINMAX[1][i]);
}
data->alarms = 0;
for (i = 0; i < NUM_REG_ALARM; i++) {
u8 alarm;
if (!data->REG_ALARM[i])
continue;
alarm = nct6775_read_value(data, data->REG_ALARM[i]);
data->alarms |= ((u64)alarm) << (i << 3);
}
data->last_updated = jiffies;
data->valid = true;
}
mutex_unlock(&data->update_lock);
return data;
}
/*
* Sysfs callback functions
*/
static ssize_t
show_in_reg(struct device *dev, struct device_attribute *attr, char *buf)
{
struct nct6775_data *data = nct6775_update_device(dev);
struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
int nr = sattr->nr;
int index = sattr->index;
return sprintf(buf, "%ld\n", in_from_reg(data->in[nr][index], nr));
}
static ssize_t
store_in_reg(struct device *dev, struct device_attribute *attr, const char *buf,
size_t count)
{
struct nct6775_data *data = dev_get_drvdata(dev);
struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
int nr = sattr->nr;
int index = sattr->index;
unsigned long val;
int err = kstrtoul(buf, 10, &val);
if (err < 0)
return err;
mutex_lock(&data->update_lock);
data->in[nr][index] = in_to_reg(val, nr);
nct6775_write_value(data, data->REG_IN_MINMAX[index-1][nr],
data->in[nr][index]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t
show_alarm(struct device *dev, struct device_attribute *attr, char *buf)
{
struct nct6775_data *data = nct6775_update_device(dev);
struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
int nr = data->ALARM_BITS[sattr->index];
return sprintf(buf, "%u\n",
(unsigned int)((data->alarms >> nr) & 0x01));
}
static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in_reg, NULL, 0, 0);
static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in_reg, NULL, 1, 0);
static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in_reg, NULL, 2, 0);
static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in_reg, NULL, 3, 0);
static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in_reg, NULL, 4, 0);
static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in_reg, NULL, 5, 0);
static SENSOR_DEVICE_ATTR_2(in6_input, S_IRUGO, show_in_reg, NULL, 6, 0);
static SENSOR_DEVICE_ATTR_2(in7_input, S_IRUGO, show_in_reg, NULL, 7, 0);
static SENSOR_DEVICE_ATTR_2(in8_input, S_IRUGO, show_in_reg, NULL, 8, 0);
static SENSOR_DEVICE_ATTR_2(in9_input, S_IRUGO, show_in_reg, NULL, 9, 0);
static SENSOR_DEVICE_ATTR_2(in10_input, S_IRUGO, show_in_reg, NULL, 10, 0);
static SENSOR_DEVICE_ATTR_2(in11_input, S_IRUGO, show_in_reg, NULL, 11, 0);
static SENSOR_DEVICE_ATTR_2(in12_input, S_IRUGO, show_in_reg, NULL, 12, 0);
static SENSOR_DEVICE_ATTR_2(in13_input, S_IRUGO, show_in_reg, NULL, 13, 0);
static SENSOR_DEVICE_ATTR_2(in14_input, S_IRUGO, show_in_reg, NULL, 14, 0);
static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 4);
static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 5);
static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 7);
static SENSOR_DEVICE_ATTR(in8_alarm, S_IRUGO, show_alarm, NULL, 8);
static SENSOR_DEVICE_ATTR(in9_alarm, S_IRUGO, show_alarm, NULL, 9);
static SENSOR_DEVICE_ATTR(in10_alarm, S_IRUGO, show_alarm, NULL, 10);
static SENSOR_DEVICE_ATTR(in11_alarm, S_IRUGO, show_alarm, NULL, 11);
static SENSOR_DEVICE_ATTR(in12_alarm, S_IRUGO, show_alarm, NULL, 12);
static SENSOR_DEVICE_ATTR(in13_alarm, S_IRUGO, show_alarm, NULL, 13);
static SENSOR_DEVICE_ATTR(in14_alarm, S_IRUGO, show_alarm, NULL, 14);
static SENSOR_DEVICE_ATTR_2(in0_min, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 0, 1);
static SENSOR_DEVICE_ATTR_2(in1_min, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 1, 1);
static SENSOR_DEVICE_ATTR_2(in2_min, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 2, 1);
static SENSOR_DEVICE_ATTR_2(in3_min, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 3, 1);
static SENSOR_DEVICE_ATTR_2(in4_min, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 4, 1);
static SENSOR_DEVICE_ATTR_2(in5_min, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 5, 1);
static SENSOR_DEVICE_ATTR_2(in6_min, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 6, 1);
static SENSOR_DEVICE_ATTR_2(in7_min, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 7, 1);
static SENSOR_DEVICE_ATTR_2(in8_min, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 8, 1);
static SENSOR_DEVICE_ATTR_2(in9_min, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 9, 1);
static SENSOR_DEVICE_ATTR_2(in10_min, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 10, 1);
static SENSOR_DEVICE_ATTR_2(in11_min, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 11, 1);
static SENSOR_DEVICE_ATTR_2(in12_min, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 12, 1);
static SENSOR_DEVICE_ATTR_2(in13_min, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 13, 1);
static SENSOR_DEVICE_ATTR_2(in14_min, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 14, 1);
static SENSOR_DEVICE_ATTR_2(in0_max, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 0, 2);
static SENSOR_DEVICE_ATTR_2(in1_max, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 1, 2);
static SENSOR_DEVICE_ATTR_2(in2_max, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 2, 2);
static SENSOR_DEVICE_ATTR_2(in3_max, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 3, 2);
static SENSOR_DEVICE_ATTR_2(in4_max, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 4, 2);
static SENSOR_DEVICE_ATTR_2(in5_max, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 5, 2);
static SENSOR_DEVICE_ATTR_2(in6_max, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 6, 2);
static SENSOR_DEVICE_ATTR_2(in7_max, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 7, 2);
static SENSOR_DEVICE_ATTR_2(in8_max, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 8, 2);
static SENSOR_DEVICE_ATTR_2(in9_max, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 9, 2);
static SENSOR_DEVICE_ATTR_2(in10_max, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 10, 2);
static SENSOR_DEVICE_ATTR_2(in11_max, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 11, 2);
static SENSOR_DEVICE_ATTR_2(in12_max, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 12, 2);
static SENSOR_DEVICE_ATTR_2(in13_max, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 13, 2);
static SENSOR_DEVICE_ATTR_2(in14_max, S_IWUSR | S_IRUGO, show_in_reg,
store_in_reg, 14, 2);
static struct attribute *nct6775_attributes_in[15][5] = {
{
&sensor_dev_attr_in0_input.dev_attr.attr,
&sensor_dev_attr_in0_min.dev_attr.attr,
&sensor_dev_attr_in0_max.dev_attr.attr,
&sensor_dev_attr_in0_alarm.dev_attr.attr,
NULL
},
{
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in1_min.dev_attr.attr,
&sensor_dev_attr_in1_max.dev_attr.attr,
&sensor_dev_attr_in1_alarm.dev_attr.attr,
NULL
},
{
&sensor_dev_attr_in2_input.dev_attr.attr,
&sensor_dev_attr_in2_min.dev_attr.attr,
&sensor_dev_attr_in2_max.dev_attr.attr,
&sensor_dev_attr_in2_alarm.dev_attr.attr,
NULL
},
{
&sensor_dev_attr_in3_input.dev_attr.attr,
&sensor_dev_attr_in3_min.dev_attr.attr,
&sensor_dev_attr_in3_max.dev_attr.attr,
&sensor_dev_attr_in3_alarm.dev_attr.attr,
NULL
},
{
&sensor_dev_attr_in4_input.dev_attr.attr,
&sensor_dev_attr_in4_min.dev_attr.attr,
&sensor_dev_attr_in4_max.dev_attr.attr,
&sensor_dev_attr_in4_alarm.dev_attr.attr,
NULL
},
{
&sensor_dev_attr_in5_input.dev_attr.attr,
&sensor_dev_attr_in5_min.dev_attr.attr,
&sensor_dev_attr_in5_max.dev_attr.attr,
&sensor_dev_attr_in5_alarm.dev_attr.attr,
NULL
},
{
&sensor_dev_attr_in6_input.dev_attr.attr,
&sensor_dev_attr_in6_min.dev_attr.attr,
&sensor_dev_attr_in6_max.dev_attr.attr,
&sensor_dev_attr_in6_alarm.dev_attr.attr,
NULL
},
{
&sensor_dev_attr_in7_input.dev_attr.attr,
&sensor_dev_attr_in7_min.dev_attr.attr,
&sensor_dev_attr_in7_max.dev_attr.attr,
&sensor_dev_attr_in7_alarm.dev_attr.attr,
NULL
},
{
&sensor_dev_attr_in8_input.dev_attr.attr,
&sensor_dev_attr_in8_min.dev_attr.attr,
&sensor_dev_attr_in8_max.dev_attr.attr,
&sensor_dev_attr_in8_alarm.dev_attr.attr,
NULL
},
{
&sensor_dev_attr_in9_input.dev_attr.attr,
&sensor_dev_attr_in9_min.dev_attr.attr,
&sensor_dev_attr_in9_max.dev_attr.attr,
&sensor_dev_attr_in9_alarm.dev_attr.attr,
NULL
},
{
&sensor_dev_attr_in10_input.dev_attr.attr,
&sensor_dev_attr_in10_min.dev_attr.attr,
&sensor_dev_attr_in10_max.dev_attr.attr,
&sensor_dev_attr_in10_alarm.dev_attr.attr,
NULL
},
{
&sensor_dev_attr_in11_input.dev_attr.attr,
&sensor_dev_attr_in11_min.dev_attr.attr,
&sensor_dev_attr_in11_max.dev_attr.attr,
&sensor_dev_attr_in11_alarm.dev_attr.attr,
NULL
},
{
&sensor_dev_attr_in12_input.dev_attr.attr,
&sensor_dev_attr_in12_min.dev_attr.attr,
&sensor_dev_attr_in12_max.dev_attr.attr,
&sensor_dev_attr_in12_alarm.dev_attr.attr,
NULL
},
{
&sensor_dev_attr_in13_input.dev_attr.attr,
&sensor_dev_attr_in13_min.dev_attr.attr,
&sensor_dev_attr_in13_max.dev_attr.attr,
&sensor_dev_attr_in13_alarm.dev_attr.attr,
NULL
},
{
&sensor_dev_attr_in14_input.dev_attr.attr,
&sensor_dev_attr_in14_min.dev_attr.attr,
&sensor_dev_attr_in14_max.dev_attr.attr,
&sensor_dev_attr_in14_alarm.dev_attr.attr,
NULL
},
};
static const struct attribute_group nct6775_group_in[15] = {
{ .attrs = nct6775_attributes_in[0] },
{ .attrs = nct6775_attributes_in[1] },
{ .attrs = nct6775_attributes_in[2] },
{ .attrs = nct6775_attributes_in[3] },
{ .attrs = nct6775_attributes_in[4] },
{ .attrs = nct6775_attributes_in[5] },
{ .attrs = nct6775_attributes_in[6] },
{ .attrs = nct6775_attributes_in[7] },
{ .attrs = nct6775_attributes_in[8] },
{ .attrs = nct6775_attributes_in[9] },
{ .attrs = nct6775_attributes_in[10] },
{ .attrs = nct6775_attributes_in[11] },
{ .attrs = nct6775_attributes_in[12] },
{ .attrs = nct6775_attributes_in[13] },
{ .attrs = nct6775_attributes_in[14] },
};
static ssize_t
show_name(struct device *dev, struct device_attribute *attr, char *buf)
{
struct nct6775_data *data = dev_get_drvdata(dev);
return sprintf(buf, "%s\n", data->name);
}
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
static ssize_t
show_vid(struct device *dev, struct device_attribute *attr, char *buf)
{
struct nct6775_data *data = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
}
static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
/* Case open detection */
static ssize_t
clear_caseopen(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct nct6775_data *data = dev_get_drvdata(dev);
struct nct6775_sio_data *sio_data = dev->platform_data;
int nr = to_sensor_dev_attr(attr)->index - INTRUSION_ALARM_BASE;
unsigned long val;
u8 reg;
int ret;
if (kstrtoul(buf, 10, &val) || val != 0)
return -EINVAL;
mutex_lock(&data->update_lock);
/*
* Use CR registers to clear caseopen status.
* The CR registers are the same for all chips, and not all chips
* support clearing the caseopen status through "regular" registers.
*/
ret = superio_enter(sio_data->sioreg);
if (ret) {
count = ret;
goto error;
}
superio_select(sio_data->sioreg, NCT6775_LD_ACPI);
reg = superio_inb(sio_data->sioreg, NCT6775_REG_CR_CASEOPEN_CLR[nr]);
reg |= NCT6775_CR_CASEOPEN_CLR_MASK[nr];
superio_outb(sio_data->sioreg, NCT6775_REG_CR_CASEOPEN_CLR[nr], reg);
reg &= ~NCT6775_CR_CASEOPEN_CLR_MASK[nr];
superio_outb(sio_data->sioreg, NCT6775_REG_CR_CASEOPEN_CLR[nr], reg);
superio_exit(sio_data->sioreg);
data->valid = false; /* Force cache refresh */
error:
mutex_unlock(&data->update_lock);
return count;
}
static struct sensor_device_attribute sda_caseopen[] = {
SENSOR_ATTR(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm,
clear_caseopen, INTRUSION_ALARM_BASE),
SENSOR_ATTR(intrusion1_alarm, S_IWUSR | S_IRUGO, show_alarm,
clear_caseopen, INTRUSION_ALARM_BASE + 1),
};
/*
* Driver and device management
*/
static void nct6775_device_remove_files(struct device *dev)
{
/*
* some entries in the following arrays may not have been used in
* device_create_file(), but device_remove_file() will ignore them
*/
int i;
struct nct6775_data *data = dev_get_drvdata(dev);
for (i = 0; i < data->in_num; i++)
sysfs_remove_group(&dev->kobj, &nct6775_group_in[i]);
device_remove_file(dev, &sda_caseopen[0].dev_attr);
device_remove_file(dev, &sda_caseopen[1].dev_attr);
device_remove_file(dev, &dev_attr_name);
device_remove_file(dev, &dev_attr_cpu0_vid);
}
/* Get the monitoring functions started */
static inline void nct6775_init_device(struct nct6775_data *data)
{
u8 tmp;
/* Start monitoring if needed */
if (data->REG_CONFIG) {
tmp = nct6775_read_value(data, data->REG_CONFIG);
if (!(tmp & 0x01))
nct6775_write_value(data, data->REG_CONFIG, tmp | 0x01);
}
/* Enable VBAT monitoring if needed */
tmp = nct6775_read_value(data, data->REG_VBAT);
if (!(tmp & 0x01))
nct6775_write_value(data, data->REG_VBAT, tmp | 0x01);
}
static int nct6775_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct nct6775_sio_data *sio_data = dev->platform_data;
struct nct6775_data *data;
struct resource *res;
int i, err = 0;
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (!devm_request_region(&pdev->dev, res->start, IOREGION_LENGTH,
DRVNAME))
return -EBUSY;
data = devm_kzalloc(&pdev->dev, sizeof(struct nct6775_data),
GFP_KERNEL);
if (!data)
return -ENOMEM;
data->kind = sio_data->kind;
data->addr = res->start;
mutex_init(&data->lock);
mutex_init(&data->update_lock);
data->name = nct6775_device_names[data->kind];
data->bank = 0xff; /* Force initial bank selection */
platform_set_drvdata(pdev, data);
switch (data->kind) {
case nct6775:
data->in_num = 9;
data->ALARM_BITS = NCT6775_ALARM_BITS;
data->REG_CONFIG = NCT6775_REG_CONFIG;
data->REG_VBAT = NCT6775_REG_VBAT;
data->REG_VIN = NCT6775_REG_IN;
data->REG_IN_MINMAX[0] = NCT6775_REG_IN_MIN;
data->REG_IN_MINMAX[1] = NCT6775_REG_IN_MAX;
data->REG_ALARM = NCT6775_REG_ALARM;
break;
case nct6776:
data->in_num = 9;
data->ALARM_BITS = NCT6776_ALARM_BITS;
data->REG_CONFIG = NCT6775_REG_CONFIG;
data->REG_VBAT = NCT6775_REG_VBAT;
data->REG_VIN = NCT6775_REG_IN;
data->REG_IN_MINMAX[0] = NCT6775_REG_IN_MIN;
data->REG_IN_MINMAX[1] = NCT6775_REG_IN_MAX;
data->REG_ALARM = NCT6775_REG_ALARM;
break;
case nct6779:
data->in_num = 15;
data->ALARM_BITS = NCT6779_ALARM_BITS;
data->REG_CONFIG = NCT6775_REG_CONFIG;
data->REG_VBAT = NCT6775_REG_VBAT;
data->REG_VIN = NCT6779_REG_IN;
data->REG_IN_MINMAX[0] = NCT6775_REG_IN_MIN;
data->REG_IN_MINMAX[1] = NCT6775_REG_IN_MAX;
data->REG_ALARM = NCT6779_REG_ALARM;
break;
default:
return -ENODEV;
}
data->have_in = (1 << data->in_num) - 1;
/* Initialize the chip */
nct6775_init_device(data);
data->vrm = vid_which_vrm();
err = superio_enter(sio_data->sioreg);
if (err)
return err;
/*
* Read VID value
* We can get the VID input values directly at logical device D 0xe3.
*/
superio_select(sio_data->sioreg, NCT6775_LD_VID);
data->vid = superio_inb(sio_data->sioreg, 0xe3);
superio_exit(sio_data->sioreg);
err = device_create_file(dev, &dev_attr_cpu0_vid);
if (err)
return err;
for (i = 0; i < data->in_num; i++) {
if (!(data->have_in & (1 << i)))
continue;
err = sysfs_create_group(&dev->kobj, &nct6775_group_in[i]);
if (err)
goto exit_remove;
}
for (i = 0; i < ARRAY_SIZE(sda_caseopen); i++) {
if (data->ALARM_BITS[INTRUSION_ALARM_BASE + i] < 0)
continue;
err = device_create_file(dev, &sda_caseopen[i].dev_attr);
if (err)
goto exit_remove;
}
err = device_create_file(dev, &dev_attr_name);
if (err)
goto exit_remove;
data->hwmon_dev = hwmon_device_register(dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto exit_remove;
}
return 0;
exit_remove:
nct6775_device_remove_files(dev);
return err;
}
static int nct6775_remove(struct platform_device *pdev)
{
struct nct6775_data *data = platform_get_drvdata(pdev);
hwmon_device_unregister(data->hwmon_dev);
nct6775_device_remove_files(&pdev->dev);
return 0;
}
static struct platform_driver nct6775_driver = {
.driver = {
.owner = THIS_MODULE,
.name = DRVNAME,
},
.probe = nct6775_probe,
.remove = nct6775_remove,
};
/* nct6775_find() looks for a '627 in the Super-I/O config space */
static int __init nct6775_find(int sioaddr, unsigned short *addr,
struct nct6775_sio_data *sio_data)
{
static const char sio_name_NCT6775[] __initconst = "NCT6775F";
static const char sio_name_NCT6776[] __initconst = "NCT6776F";
static const char sio_name_NCT6779[] __initconst = "NCT6779D";
u16 val;
const char *sio_name;
int err;
err = superio_enter(sioaddr);
if (err)
return err;
if (force_id)
val = force_id;
else
val = (superio_inb(sioaddr, SIO_REG_DEVID) << 8)
| superio_inb(sioaddr, SIO_REG_DEVID + 1);
switch (val & SIO_ID_MASK) {
case SIO_NCT6775_ID:
sio_data->kind = nct6775;
sio_name = sio_name_NCT6775;
break;
case SIO_NCT6776_ID:
sio_data->kind = nct6776;
sio_name = sio_name_NCT6776;
break;
case SIO_NCT6779_ID:
sio_data->kind = nct6779;
sio_name = sio_name_NCT6779;
break;
default:
if (val != 0xffff)
pr_debug("unsupported chip ID: 0x%04x\n", val);
superio_exit(sioaddr);
return -ENODEV;
}
/* We have a known chip, find the HWM I/O address */
superio_select(sioaddr, NCT6775_LD_HWM);
val = (superio_inb(sioaddr, SIO_REG_ADDR) << 8)
| superio_inb(sioaddr, SIO_REG_ADDR + 1);
*addr = val & IOREGION_ALIGNMENT;
if (*addr == 0) {
pr_err("Refusing to enable a Super-I/O device with a base I/O port 0\n");
superio_exit(sioaddr);
return -ENODEV;
}
/* Activate logical device if needed */
val = superio_inb(sioaddr, SIO_REG_ENABLE);
if (!(val & 0x01)) {
pr_warn("Forcibly enabling Super-I/O. Sensor is probably unusable.\n");
superio_outb(sioaddr, SIO_REG_ENABLE, val | 0x01);
}
superio_exit(sioaddr);
pr_info("Found %s chip at %#x\n", sio_name, *addr);
sio_data->sioreg = sioaddr;
return 0;
}
/*
* 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 nct6775 driver. But since we platform_device_alloc(), we
* must keep track of the device
*/
static struct platform_device *pdev;
static int __init sensors_nct6775_init(void)
{
int err;
unsigned short address;
struct resource res;
struct nct6775_sio_data sio_data;
/*
* 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
* nct6775 hardware monitor, and call probe()
*/
if (nct6775_find(0x2e, &address, &sio_data) &&
nct6775_find(0x4e, &address, &sio_data))
return -ENODEV;
err = platform_driver_register(&nct6775_driver);
if (err)
goto exit;
pdev = platform_device_alloc(DRVNAME, address);
if (!pdev) {
err = -ENOMEM;
pr_err("Device allocation failed\n");
goto exit_unregister;
}
err = platform_device_add_data(pdev, &sio_data,
sizeof(struct nct6775_sio_data));
if (err) {
pr_err("Platform data allocation failed\n");
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)
goto exit_device_put;
err = platform_device_add_resources(pdev, &res, 1);
if (err) {
pr_err("Device resource addition failed (%d)\n", err);
goto exit_device_put;
}
/* platform_device_add calls probe() */
err = platform_device_add(pdev);
if (err) {
pr_err("Device addition failed (%d)\n", err);
goto exit_device_put;
}
return 0;
exit_device_put:
platform_device_put(pdev);
exit_unregister:
platform_driver_unregister(&nct6775_driver);
exit:
return err;
}
static void __exit sensors_nct6775_exit(void)
{
platform_device_unregister(pdev);
platform_driver_unregister(&nct6775_driver);
}
MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
MODULE_DESCRIPTION("NCT6775F/NCT6776F/NCT6779D driver");
MODULE_LICENSE("GPL");
module_init(sensors_nct6775_init);
module_exit(sensors_nct6775_exit);
