/***************************************************************************
* Copyright (C) 2010-2011 Hans de Goede <hdegoede@redhat.com> *
* *
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#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/err.h>
#include <linux/mutex.h>
#include <linux/io.h>
#include <linux/acpi.h>
#include <linux/delay.h>
#define DRVNAME "sch5627"
#define DEVNAME DRVNAME /* We only support one model */
#define SIO_SCH5627_EM_LD 0x0C /* Embedded Microcontroller LD */
#define SIO_UNLOCK_KEY 0x55 /* Key to enable Super-I/O */
#define SIO_LOCK_KEY 0xAA /* Key to disable Super-I/O */
#define SIO_REG_LDSEL 0x07 /* Logical device select */
#define SIO_REG_DEVID 0x20 /* Device ID */
#define SIO_REG_ENABLE 0x30 /* Logical device enable */
#define SIO_REG_ADDR 0x66 /* Logical device address (2 bytes) */
#define SIO_SCH5627_ID 0xC6 /* Chipset ID */
#define REGION_LENGTH 9
#define SCH5627_HWMON_ID 0xa5
#define SCH5627_COMPANY_ID 0x5c
#define SCH5627_PRIMARY_ID 0xa0
#define SCH5627_REG_BUILD_CODE 0x39
#define SCH5627_REG_BUILD_ID 0x3a
#define SCH5627_REG_HWMON_ID 0x3c
#define SCH5627_REG_HWMON_REV 0x3d
#define SCH5627_REG_COMPANY_ID 0x3e
#define SCH5627_REG_PRIMARY_ID 0x3f
#define SCH5627_REG_CTRL 0x40
#define SCH5627_NO_TEMPS 8
#define SCH5627_NO_FANS 4
#define SCH5627_NO_IN 5
static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {
0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };
static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {
0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };
static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {
0, 0, 1, 1, 0, 0, 0, 1 };
static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {
0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };
static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {
0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };
static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
0x2C, 0x2E, 0x30, 0x32 };
static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
0x62, 0x64, 0x66, 0x68 };
static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
0x22, 0x23, 0x24, 0x25, 0x189 };
static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
0xE4, 0xE4, 0xE3, 0xE3, 0x18A };
static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {
1, 0, 1, 0, 1 };
static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {
10745, 3660, 9765, 10745, 3660 };
static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
"VCC", "VTT", "VBAT", "VTR", "V_IN" };
struct sch5627_data {
unsigned short addr;
struct device *hwmon_dev;
u8 temp_max[SCH5627_NO_TEMPS];
u8 temp_crit[SCH5627_NO_TEMPS];
u16 fan_min[SCH5627_NO_FANS];
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
u16 temp[SCH5627_NO_TEMPS];
u16 fan[SCH5627_NO_FANS];
u16 in[SCH5627_NO_IN];
};
static struct platform_device *sch5627_pdev;
/* Super I/O functions */
static inline int superio_inb(int base, int reg)
{
outb(reg, base);
return inb(base + 1);
}
static inline int superio_enter(int base)
{
/* Don't step on other drivers' I/O space by accident */
if (!request_muxed_region(base, 2, DRVNAME)) {
pr_err("I/O address 0x%04x already in use\n", base);
return -EBUSY;
}
outb(SIO_UNLOCK_KEY, base);
return 0;
}
static inline void superio_select(int base, int ld)
{
outb(SIO_REG_LDSEL, base);
outb(ld, base + 1);
}
static inline void superio_exit(int base)
{
outb(SIO_LOCK_KEY, base);
release_region(base, 2);
}
static int sch5627_read_virtual_reg(struct sch5627_data *data, u16 reg)
{
u8 val;
int i;
/*
* According to SMSC for the commands we use the maximum time for
* the EM to respond is 15 ms, but testing shows in practice it
* responds within 15-32 reads, so we first busy poll, and if
* that fails sleep a bit and try again until we are way past
* the 15 ms maximum response time.
*/
const int max_busy_polls = 64;
const int max_lazy_polls = 32;
/* (Optional) Write-Clear the EC to Host Mailbox Register */
val = inb(data->addr + 1);
outb(val, data->addr + 1);
/* Set Mailbox Address Pointer to first location in Region 1 */
outb(0x00, data->addr + 2);
outb(0x80, data->addr + 3);
/* Write Request Packet Header */
outb(0x02, data->addr + 4); /* Access Type: VREG read */
outb(0x01, data->addr + 5); /* # of Entries: 1 Byte (8-bit) */
outb(0x04, data->addr + 2); /* Mailbox AP to first data entry loc. */
/* Write Address field */
outb(reg & 0xff, data->addr + 6);
outb(reg >> 8, data->addr + 7);
/* Execute the Random Access Command */
outb(0x01, data->addr); /* Write 01h to the Host-to-EC register */
/* EM Interface Polling "Algorithm" */
for (i = 0; i < max_busy_polls + max_lazy_polls; i++) {
if (i >= max_busy_polls)
msleep(1);
/* Read Interrupt source Register */
val = inb(data->addr + 8);
/* Write Clear the interrupt source bits */
if (val)
outb(val, data->addr + 8);
/* Command Completed ? */
if (val & 0x01)
break;
}
if (i == max_busy_polls + max_lazy_polls) {
pr_err("Max retries exceeded reading virtual "
"register 0x%04hx (%d)\n", reg, 1);
return -EIO;
}
/*
* According to SMSC we may need to retry this, but sofar I've always
* seen this succeed in 1 try.
*/
for (i = 0; i < max_busy_polls; i++) {
/* Read EC-to-Host Register */
val = inb(data->addr + 1);
/* Command Completed ? */
if (val == 0x01)
break;
if (i == 0)
pr_warn("EC reports: 0x%02x reading virtual register "
"0x%04hx\n", (unsigned int)val, reg);
}
if (i == max_busy_polls) {
pr_err("Max retries exceeded reading virtual "
"register 0x%04hx (%d)\n", reg, 2);
return -EIO;
}
/*
* According to the SMSC app note we should now do:
*
* Set Mailbox Address Pointer to first location in Region 1 *
* outb(0x00, data->addr + 2);
* outb(0x80, data->addr + 3);
*
* But if we do that things don't work, so let's not.
*/
/* Read Data from Mailbox */
return inb(data->addr + 4);
}
static int sch5627_read_virtual_reg16(struct sch5627_data *data, u16 reg)
{
int lsb, msb;
/* Read LSB first, this will cause the matching MSB to be latched */
lsb = sch5627_read_virtual_reg(data, reg);
if (lsb < 0)
return lsb;
msb = sch5627_read_virtual_reg(data, reg + 1);
if (msb < 0)
return msb;
return lsb | (msb << 8);
}
static int sch5627_read_virtual_reg12(struct sch5627_data *data, u16 msb_reg,
u16 lsn_reg, int high_nibble)
{
int msb, lsn;
/* Read MSB first, this will cause the matching LSN to be latched */
msb = sch5627_read_virtual_reg(data, msb_reg);
if (msb < 0)
return msb;
lsn = sch5627_read_virtual_reg(data, lsn_reg);
if (lsn < 0)
return lsn;
if (high_nibble)
return (msb << 4) | (lsn >> 4);
else
return (msb << 4) | (lsn & 0x0f);
}
static struct sch5627_data *sch5627_update_device(struct device *dev)
{
struct sch5627_data *data = dev_get_drvdata(dev);
struct sch5627_data *ret = data;
int i, val;
mutex_lock(&data->update_lock);
/* Cache the values for 1 second */
if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
for (i = 0; i < SCH5627_NO_TEMPS; i++) {
val = sch5627_read_virtual_reg12(data,
SCH5627_REG_TEMP_MSB[i],
SCH5627_REG_TEMP_LSN[i],
SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
if (unlikely(val < 0)) {
ret = ERR_PTR(val);
goto abort;
}
data->temp[i] = val;
}
for (i = 0; i < SCH5627_NO_FANS; i++) {
val = sch5627_read_virtual_reg16(data,
SCH5627_REG_FAN[i]);
if (unlikely(val < 0)) {
ret = ERR_PTR(val);
goto abort;
}
data->fan[i] = val;
}
for (i = 0; i < SCH5627_NO_IN; i++) {
val = sch5627_read_virtual_reg12(data,
SCH5627_REG_IN_MSB[i],
SCH5627_REG_IN_LSN[i],
SCH5627_REG_IN_HIGH_NIBBLE[i]);
if (unlikely(val < 0)) {
ret = ERR_PTR(val);
goto abort;
}
data->in[i] = val;
}
data->last_updated = jiffies;
data->valid = 1;
}
abort:
mutex_unlock(&data->update_lock);
return ret;
}
static int __devinit sch5627_read_limits(struct sch5627_data *data)
{
int i, val;
for (i = 0; i < SCH5627_NO_TEMPS; i++) {
/*
* Note what SMSC calls ABS, is what lm_sensors calls max
* (aka high), and HIGH is what lm_sensors calls crit.
*/
val = sch5627_read_virtual_reg(data, SCH5627_REG_TEMP_ABS[i]);
if (val < 0)
return val;
data->temp_max[i] = val;
val = sch5627_read_virtual_reg(data, SCH5627_REG_TEMP_HIGH[i]);
if (val < 0)
return val;
data->temp_crit[i] = val;
}
for (i = 0; i < SCH5627_NO_FANS; i++) {
val = sch5627_read_virtual_reg16(data, SCH5627_REG_FAN_MIN[i]);
if (val < 0)
return val;
data->fan_min[i] = val;
}
return 0;
}
static int reg_to_temp(u16 reg)
{
return (reg * 625) / 10 - 64000;
}
static int reg_to_temp_limit(u8 reg)
{
return (reg - 64) * 1000;
}
static int reg_to_rpm(u16 reg)
{
if (reg == 0)
return -EIO;
if (reg == 0xffff)
return 0;
return 5400540 / reg;
}
static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
}
static ssize_t show_temp(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5627_data *data = sch5627_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = reg_to_temp(data->temp[attr->index]);
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static ssize_t show_temp_fault(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5627_data *data = sch5627_update_device(dev);
if (IS_ERR(data))
return PTR_ERR(data);
return snprintf(buf, PAGE_SIZE, "%d\n", data->temp[attr->index] == 0);
}
static ssize_t show_temp_max(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5627_data *data = dev_get_drvdata(dev);
int val;
val = reg_to_temp_limit(data->temp_max[attr->index]);
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static ssize_t show_temp_crit(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5627_data *data = dev_get_drvdata(dev);
int val;
val = reg_to_temp_limit(data->temp_crit[attr->index]);
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static ssize_t show_fan(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5627_data *data = sch5627_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = reg_to_rpm(data->fan[attr->index]);
if (val < 0)
return val;
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static ssize_t show_fan_fault(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5627_data *data = sch5627_update_device(dev);
if (IS_ERR(data))
return PTR_ERR(data);
return snprintf(buf, PAGE_SIZE, "%d\n",
data->fan[attr->index] == 0xffff);
}
static ssize_t show_fan_min(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5627_data *data = dev_get_drvdata(dev);
int val = reg_to_rpm(data->fan_min[attr->index]);
if (val < 0)
return val;
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static ssize_t show_in(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct sch5627_data *data = sch5627_update_device(dev);
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = DIV_ROUND_CLOSEST(
data->in[attr->index] * SCH5627_REG_IN_FACTOR[attr->index],
10000);
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
static ssize_t show_in_label(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
return snprintf(buf, PAGE_SIZE, "%s\n",
SCH5627_IN_LABELS[attr->index]);
}
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5);
static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6);
static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7);
static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5);
static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_temp_fault, NULL, 6);
static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_temp_fault, NULL, 7);
static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_max, S_IRUGO, show_temp_max, NULL, 5);
static SENSOR_DEVICE_ATTR(temp7_max, S_IRUGO, show_temp_max, NULL, 6);
static SENSOR_DEVICE_ATTR(temp8_max, S_IRUGO, show_temp_max, NULL, 7);
static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_crit, S_IRUGO, show_temp_crit, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_crit, S_IRUGO, show_temp_crit, NULL, 5);
static SENSOR_DEVICE_ATTR(temp7_crit, S_IRUGO, show_temp_crit, NULL, 6);
static SENSOR_DEVICE_ATTR(temp8_crit, S_IRUGO, show_temp_crit, NULL, 7);
static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0);
static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1);
static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2);
static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3);
static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan_min, NULL, 0);
static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan_min, NULL, 1);
static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO, show_fan_min, NULL, 2);
static SENSOR_DEVICE_ATTR(fan4_min, S_IRUGO, show_fan_min, NULL, 3);
static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in, NULL, 4);
static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_in_label, NULL, 0);
static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, show_in_label, NULL, 1);
static SENSOR_DEVICE_ATTR(in2_label, S_IRUGO, show_in_label, NULL, 2);
static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_in_label, NULL, 3);
static struct attribute *sch5627_attributes[] = {
&dev_attr_name.attr,
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp3_input.dev_attr.attr,
&sensor_dev_attr_temp4_input.dev_attr.attr,
&sensor_dev_attr_temp5_input.dev_attr.attr,
&sensor_dev_attr_temp6_input.dev_attr.attr,
&sensor_dev_attr_temp7_input.dev_attr.attr,
&sensor_dev_attr_temp8_input.dev_attr.attr,
&sensor_dev_attr_temp1_fault.dev_attr.attr,
&sensor_dev_attr_temp2_fault.dev_attr.attr,
&sensor_dev_attr_temp3_fault.dev_attr.attr,
&sensor_dev_attr_temp4_fault.dev_attr.attr,
&sensor_dev_attr_temp5_fault.dev_attr.attr,
&sensor_dev_attr_temp6_fault.dev_attr.attr,
&sensor_dev_attr_temp7_fault.dev_attr.attr,
&sensor_dev_attr_temp8_fault.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp2_max.dev_attr.attr,
&sensor_dev_attr_temp3_max.dev_attr.attr,
&sensor_dev_attr_temp4_max.dev_attr.attr,
&sensor_dev_attr_temp5_max.dev_attr.attr,
&sensor_dev_attr_temp6_max.dev_attr.attr,
&sensor_dev_attr_temp7_max.dev_attr.attr,
&sensor_dev_attr_temp8_max.dev_attr.attr,
&sensor_dev_attr_temp1_crit.dev_attr.attr,
&sensor_dev_attr_temp2_crit.dev_attr.attr,
&sensor_dev_attr_temp3_crit.dev_attr.attr,
&sensor_dev_attr_temp4_crit.dev_attr.attr,
&sensor_dev_attr_temp5_crit.dev_attr.attr,
&sensor_dev_attr_temp6_crit.dev_attr.attr,
&sensor_dev_attr_temp7_crit.dev_attr.attr,
&sensor_dev_attr_temp8_crit.dev_attr.attr,
&sensor_dev_attr_fan1_input.dev_attr.attr,
&sensor_dev_attr_fan2_input.dev_attr.attr,
&sensor_dev_attr_fan3_input.dev_attr.attr,
&sensor_dev_attr_fan4_input.dev_attr.attr,
&sensor_dev_attr_fan1_fault.dev_attr.attr,
&sensor_dev_attr_fan2_fault.dev_attr.attr,
&sensor_dev_attr_fan3_fault.dev_attr.attr,
&sensor_dev_attr_fan4_fault.dev_attr.attr,
&sensor_dev_attr_fan1_min.dev_attr.attr,
&sensor_dev_attr_fan2_min.dev_attr.attr,
&sensor_dev_attr_fan3_min.dev_attr.attr,
&sensor_dev_attr_fan4_min.dev_attr.attr,
&sensor_dev_attr_in0_input.dev_attr.attr,
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in2_input.dev_attr.attr,
&sensor_dev_attr_in3_input.dev_attr.attr,
&sensor_dev_attr_in4_input.dev_attr.attr,
&sensor_dev_attr_in0_label.dev_attr.attr,
&sensor_dev_attr_in1_label.dev_attr.attr,
&sensor_dev_attr_in2_label.dev_attr.attr,
&sensor_dev_attr_in3_label.dev_attr.attr,
/* No in4_label as in4 is a generic input pin */
NULL
};
static const struct attribute_group sch5627_group = {
.attrs = sch5627_attributes,
};
static int sch5627_remove(struct platform_device *pdev)
{
struct sch5627_data *data = platform_get_drvdata(pdev);
if (data->hwmon_dev)
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&pdev->dev.kobj, &sch5627_group);
platform_set_drvdata(pdev, NULL);
kfree(data);
return 0;
}
static int __devinit sch5627_probe(struct platform_device *pdev)
{
struct sch5627_data *data;
int err, build_code, build_id, hwmon_rev, val;
data = kzalloc(sizeof(struct sch5627_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
mutex_init(&data->update_lock);
platform_set_drvdata(pdev, data);
val = sch5627_read_virtual_reg(data, SCH5627_REG_HWMON_ID);
if (val < 0) {
err = val;
goto error;
}
if (val != SCH5627_HWMON_ID) {
pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
val, SCH5627_HWMON_ID);
err = -ENODEV;
goto error;
}
val = sch5627_read_virtual_reg(data, SCH5627_REG_COMPANY_ID);
if (val < 0) {
err = val;
goto error;
}
if (val != SCH5627_COMPANY_ID) {
pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
val, SCH5627_COMPANY_ID);
err = -ENODEV;
goto error;
}
val = sch5627_read_virtual_reg(data, SCH5627_REG_PRIMARY_ID);
if (val < 0) {
err = val;
goto error;
}
if (val != SCH5627_PRIMARY_ID) {
pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
val, SCH5627_PRIMARY_ID);
err = -ENODEV;
goto error;
}
build_code = sch5627_read_virtual_reg(data, SCH5627_REG_BUILD_CODE);
if (build_code < 0) {
err = build_code;
goto error;
}
build_id = sch5627_read_virtual_reg16(data, SCH5627_REG_BUILD_ID);
if (build_id < 0) {
err = build_id;
goto error;
}
hwmon_rev = sch5627_read_virtual_reg(data, SCH5627_REG_HWMON_REV);
if (hwmon_rev < 0) {
err = hwmon_rev;
goto error;
}
val = sch5627_read_virtual_reg(data, SCH5627_REG_CTRL);
if (val < 0) {
err = val;
goto error;
}
if (!(val & 0x01)) {
pr_err("hardware monitoring not enabled\n");
err = -ENODEV;
goto error;
}
/*
* Read limits, we do this only once as reading a register on
* the sch5627 is quite expensive (and they don't change).
*/
err = sch5627_read_limits(data);
if (err)
goto error;
pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
build_code, build_id, hwmon_rev);
/* Register sysfs interface files */
err = sysfs_create_group(&pdev->dev.kobj, &sch5627_group);
if (err)
goto error;
data->hwmon_dev = hwmon_device_register(&pdev->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
data->hwmon_dev = NULL;
goto error;
}
return 0;
error:
sch5627_remove(pdev);
return err;
}
static int __init sch5627_find(int sioaddr, unsigned short *address)
{
u8 devid;
int err = superio_enter(sioaddr);
if (err)
return err;
devid = superio_inb(sioaddr, SIO_REG_DEVID);
if (devid != SIO_SCH5627_ID) {
pr_debug("Unsupported device id: 0x%02x\n",
(unsigned int)devid);
err = -ENODEV;
goto exit;
}
superio_select(sioaddr, SIO_SCH5627_EM_LD);
if (!(superio_inb(sioaddr, SIO_REG_ENABLE) & 0x01)) {
pr_warn("Device not activated\n");
err = -ENODEV;
goto exit;
}
/*
* Warning the order of the low / high byte is the other way around
* as on most other superio devices!!
*/
*address = superio_inb(sioaddr, SIO_REG_ADDR) |
superio_inb(sioaddr, SIO_REG_ADDR + 1) << 8;
if (*address == 0) {
pr_warn("Base address not set\n");
err = -ENODEV;
goto exit;
}
pr_info("Found %s chip at %#hx\n", DEVNAME, *address);
exit:
superio_exit(sioaddr);
return err;
}
static int __init sch5627_device_add(unsigned short address)
{
struct resource res = {
.start = address,
.end = address + REGION_LENGTH - 1,
.flags = IORESOURCE_IO,
};
int err;
sch5627_pdev = platform_device_alloc(DRVNAME, address);
if (!sch5627_pdev)
return -ENOMEM;
res.name = sch5627_pdev->name;
err = acpi_check_resource_conflict(&res);
if (err)
goto exit_device_put;
err = platform_device_add_resources(sch5627_pdev, &res, 1);
if (err) {
pr_err("Device resource addition failed\n");
goto exit_device_put;
}
err = platform_device_add(sch5627_pdev);
if (err) {
pr_err("Device addition failed\n");
goto exit_device_put;
}
return 0;
exit_device_put:
platform_device_put(sch5627_pdev);
return err;
}
static struct platform_driver sch5627_driver = {
.driver = {
.owner = THIS_MODULE,
.name = DRVNAME,
},
.probe = sch5627_probe,
.remove = sch5627_remove,
};
static int __init sch5627_init(void)
{
int err = -ENODEV;
unsigned short address;
if (sch5627_find(0x4e, &address) && sch5627_find(0x2e, &address))
goto exit;
err = platform_driver_register(&sch5627_driver);
if (err)
goto exit;
err = sch5627_device_add(address);
if (err)
goto exit_driver;
return 0;
exit_driver:
platform_driver_unregister(&sch5627_driver);
exit:
return err;
}
static void __exit sch5627_exit(void)
{
platform_device_unregister(sch5627_pdev);
platform_driver_unregister(&sch5627_driver);
}
MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver");
MODULE_AUTHOR("Hans de Goede (hdegoede@redhat.com)");
MODULE_LICENSE("GPL");
module_init(sch5627_init);
module_exit(sch5627_exit);
