2dbbdb3574
This patch adds the SMSC SCH5317 chip (device ID 0x85) as a supported device to the smsc47b397 driver. Signed-off-by: Juerg Haefliger <juergh at gmail.com> Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
393 lines
9.5 KiB
C
393 lines
9.5 KiB
C
/*
|
|
smsc47b397.c - Part of lm_sensors, Linux kernel modules
|
|
for hardware monitoring
|
|
|
|
Supports the SMSC LPC47B397-NC Super-I/O chip.
|
|
|
|
Author/Maintainer: Mark M. Hoffman <mhoffman@lightlink.com>
|
|
Copyright (C) 2004 Utilitek Systems, Inc.
|
|
|
|
derived in part from smsc47m1.c:
|
|
Copyright (C) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
|
|
Copyright (C) 2004 Jean Delvare <khali@linux-fr.org>
|
|
|
|
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.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/ioport.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/init.h>
|
|
#include <linux/mutex.h>
|
|
#include <asm/io.h>
|
|
|
|
static struct platform_device *pdev;
|
|
|
|
#define DRVNAME "smsc47b397"
|
|
|
|
/* Super-I/0 registers and commands */
|
|
|
|
#define REG 0x2e /* The register to read/write */
|
|
#define VAL 0x2f /* The value to read/write */
|
|
|
|
static inline void superio_outb(int reg, int val)
|
|
{
|
|
outb(reg, REG);
|
|
outb(val, VAL);
|
|
}
|
|
|
|
static inline int superio_inb(int reg)
|
|
{
|
|
outb(reg, REG);
|
|
return inb(VAL);
|
|
}
|
|
|
|
/* select superio logical device */
|
|
static inline void superio_select(int ld)
|
|
{
|
|
superio_outb(0x07, ld);
|
|
}
|
|
|
|
static inline void superio_enter(void)
|
|
{
|
|
outb(0x55, REG);
|
|
}
|
|
|
|
static inline void superio_exit(void)
|
|
{
|
|
outb(0xAA, REG);
|
|
}
|
|
|
|
#define SUPERIO_REG_DEVID 0x20
|
|
#define SUPERIO_REG_DEVREV 0x21
|
|
#define SUPERIO_REG_BASE_MSB 0x60
|
|
#define SUPERIO_REG_BASE_LSB 0x61
|
|
#define SUPERIO_REG_LD8 0x08
|
|
|
|
#define SMSC_EXTENT 0x02
|
|
|
|
/* 0 <= nr <= 3 */
|
|
static u8 smsc47b397_reg_temp[] = {0x25, 0x26, 0x27, 0x80};
|
|
#define SMSC47B397_REG_TEMP(nr) (smsc47b397_reg_temp[(nr)])
|
|
|
|
/* 0 <= nr <= 3 */
|
|
#define SMSC47B397_REG_FAN_LSB(nr) (0x28 + 2 * (nr))
|
|
#define SMSC47B397_REG_FAN_MSB(nr) (0x29 + 2 * (nr))
|
|
|
|
struct smsc47b397_data {
|
|
unsigned short addr;
|
|
const char *name;
|
|
struct class_device *class_dev;
|
|
struct mutex lock;
|
|
|
|
struct mutex update_lock;
|
|
unsigned long last_updated; /* in jiffies */
|
|
int valid;
|
|
|
|
/* register values */
|
|
u16 fan[4];
|
|
u8 temp[4];
|
|
};
|
|
|
|
static int smsc47b397_read_value(struct smsc47b397_data* data, u8 reg)
|
|
{
|
|
int res;
|
|
|
|
mutex_lock(&data->lock);
|
|
outb(reg, data->addr);
|
|
res = inb_p(data->addr + 1);
|
|
mutex_unlock(&data->lock);
|
|
return res;
|
|
}
|
|
|
|
static struct smsc47b397_data *smsc47b397_update_device(struct device *dev)
|
|
{
|
|
struct smsc47b397_data *data = dev_get_drvdata(dev);
|
|
int i;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
|
|
if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
|
|
dev_dbg(dev, "starting device update...\n");
|
|
|
|
/* 4 temperature inputs, 4 fan inputs */
|
|
for (i = 0; i < 4; i++) {
|
|
data->temp[i] = smsc47b397_read_value(data,
|
|
SMSC47B397_REG_TEMP(i));
|
|
|
|
/* must read LSB first */
|
|
data->fan[i] = smsc47b397_read_value(data,
|
|
SMSC47B397_REG_FAN_LSB(i));
|
|
data->fan[i] |= smsc47b397_read_value(data,
|
|
SMSC47B397_REG_FAN_MSB(i)) << 8;
|
|
}
|
|
|
|
data->last_updated = jiffies;
|
|
data->valid = 1;
|
|
|
|
dev_dbg(dev, "... device update complete\n");
|
|
}
|
|
|
|
mutex_unlock(&data->update_lock);
|
|
|
|
return data;
|
|
}
|
|
|
|
/* TEMP: 0.001C/bit (-128C to +127C)
|
|
REG: 1C/bit, two's complement */
|
|
static int temp_from_reg(u8 reg)
|
|
{
|
|
return (s8)reg * 1000;
|
|
}
|
|
|
|
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 smsc47b397_data *data = smsc47b397_update_device(dev);
|
|
return sprintf(buf, "%d\n", temp_from_reg(data->temp[attr->index]));
|
|
}
|
|
|
|
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);
|
|
|
|
/* FAN: 1 RPM/bit
|
|
REG: count of 90kHz pulses / revolution */
|
|
static int fan_from_reg(u16 reg)
|
|
{
|
|
return 90000 * 60 / reg;
|
|
}
|
|
|
|
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 smsc47b397_data *data = smsc47b397_update_device(dev);
|
|
return sprintf(buf, "%d\n", fan_from_reg(data->fan[attr->index]));
|
|
}
|
|
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 ssize_t show_name(struct device *dev, struct device_attribute
|
|
*devattr, char *buf)
|
|
{
|
|
struct smsc47b397_data *data = dev_get_drvdata(dev);
|
|
return sprintf(buf, "%s\n", data->name);
|
|
}
|
|
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
|
|
|
|
static struct attribute *smsc47b397_attributes[] = {
|
|
&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_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,
|
|
|
|
&dev_attr_name.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group smsc47b397_group = {
|
|
.attrs = smsc47b397_attributes,
|
|
};
|
|
|
|
static int __devexit smsc47b397_remove(struct platform_device *pdev)
|
|
{
|
|
struct smsc47b397_data *data = platform_get_drvdata(pdev);
|
|
struct resource *res;
|
|
|
|
hwmon_device_unregister(data->class_dev);
|
|
sysfs_remove_group(&pdev->dev.kobj, &smsc47b397_group);
|
|
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
|
|
release_region(res->start, SMSC_EXTENT);
|
|
kfree(data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int smsc47b397_probe(struct platform_device *pdev);
|
|
|
|
static struct platform_driver smsc47b397_driver = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = DRVNAME,
|
|
},
|
|
.probe = smsc47b397_probe,
|
|
.remove = __devexit_p(smsc47b397_remove),
|
|
};
|
|
|
|
static int __devinit smsc47b397_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct smsc47b397_data *data;
|
|
struct resource *res;
|
|
int err = 0;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
|
|
if (!request_region(res->start, SMSC_EXTENT,
|
|
smsc47b397_driver.driver.name)) {
|
|
dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
|
|
(unsigned long)res->start,
|
|
(unsigned long)res->start + SMSC_EXTENT - 1);
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (!(data = kzalloc(sizeof(struct smsc47b397_data), GFP_KERNEL))) {
|
|
err = -ENOMEM;
|
|
goto error_release;
|
|
}
|
|
|
|
data->addr = res->start;
|
|
data->name = "smsc47b397";
|
|
mutex_init(&data->lock);
|
|
mutex_init(&data->update_lock);
|
|
platform_set_drvdata(pdev, data);
|
|
|
|
if ((err = sysfs_create_group(&dev->kobj, &smsc47b397_group)))
|
|
goto error_free;
|
|
|
|
data->class_dev = hwmon_device_register(dev);
|
|
if (IS_ERR(data->class_dev)) {
|
|
err = PTR_ERR(data->class_dev);
|
|
goto error_remove;
|
|
}
|
|
|
|
return 0;
|
|
|
|
error_remove:
|
|
sysfs_remove_group(&dev->kobj, &smsc47b397_group);
|
|
error_free:
|
|
kfree(data);
|
|
error_release:
|
|
release_region(res->start, SMSC_EXTENT);
|
|
return err;
|
|
}
|
|
|
|
static int __init smsc47b397_device_add(unsigned short address)
|
|
{
|
|
struct resource res = {
|
|
.start = address,
|
|
.end = address + SMSC_EXTENT - 1,
|
|
.name = DRVNAME,
|
|
.flags = IORESOURCE_IO,
|
|
};
|
|
int err;
|
|
|
|
pdev = platform_device_alloc(DRVNAME, address);
|
|
if (!pdev) {
|
|
err = -ENOMEM;
|
|
printk(KERN_ERR DRVNAME ": Device allocation failed\n");
|
|
goto exit;
|
|
}
|
|
|
|
err = platform_device_add_resources(pdev, &res, 1);
|
|
if (err) {
|
|
printk(KERN_ERR DRVNAME ": Device resource addition failed "
|
|
"(%d)\n", err);
|
|
goto exit_device_put;
|
|
}
|
|
|
|
err = platform_device_add(pdev);
|
|
if (err) {
|
|
printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
|
|
err);
|
|
goto exit_device_put;
|
|
}
|
|
|
|
return 0;
|
|
|
|
exit_device_put:
|
|
platform_device_put(pdev);
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
static int __init smsc47b397_find(unsigned short *addr)
|
|
{
|
|
u8 id, rev;
|
|
|
|
superio_enter();
|
|
id = superio_inb(SUPERIO_REG_DEVID);
|
|
|
|
if ((id != 0x6f) && (id != 0x81) && (id != 0x85)) {
|
|
superio_exit();
|
|
return -ENODEV;
|
|
}
|
|
|
|
rev = superio_inb(SUPERIO_REG_DEVREV);
|
|
|
|
superio_select(SUPERIO_REG_LD8);
|
|
*addr = (superio_inb(SUPERIO_REG_BASE_MSB) << 8)
|
|
| superio_inb(SUPERIO_REG_BASE_LSB);
|
|
|
|
printk(KERN_INFO DRVNAME ": found SMSC %s "
|
|
"(base address 0x%04x, revision %u)\n",
|
|
id == 0x81 ? "SCH5307-NS" : id == 0x85 ? "SCH5317" :
|
|
"LPC47B397-NC", *addr, rev);
|
|
|
|
superio_exit();
|
|
return 0;
|
|
}
|
|
|
|
static int __init smsc47b397_init(void)
|
|
{
|
|
unsigned short address;
|
|
int ret;
|
|
|
|
if ((ret = smsc47b397_find(&address)))
|
|
return ret;
|
|
|
|
ret = platform_driver_register(&smsc47b397_driver);
|
|
if (ret)
|
|
goto exit;
|
|
|
|
/* Sets global pdev as a side effect */
|
|
ret = smsc47b397_device_add(address);
|
|
if (ret)
|
|
goto exit_driver;
|
|
|
|
return 0;
|
|
|
|
exit_driver:
|
|
platform_driver_unregister(&smsc47b397_driver);
|
|
exit:
|
|
return ret;
|
|
}
|
|
|
|
static void __exit smsc47b397_exit(void)
|
|
{
|
|
platform_device_unregister(pdev);
|
|
platform_driver_unregister(&smsc47b397_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
|
|
MODULE_DESCRIPTION("SMSC LPC47B397 driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(smsc47b397_init);
|
|
module_exit(smsc47b397_exit);
|