1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/*
* i5500_temp - Driver for Intel 5500/5520/X58 chipset thermal sensor
*
* Copyright (C) 2012, 2014 Jean Delvare <jdelvare@suse.de>
*
* 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.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/pci.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
/* Register definitions from datasheet */
#define REG_TSTHRCATA 0xE2
#define REG_TSCTRL 0xE8
#define REG_TSTHRRPEX 0xEB
#define REG_TSTHRLO 0xEC
#define REG_TSTHRHI 0xEE
#define REG_CTHINT 0xF0
#define REG_TSFSC 0xF3
#define REG_CTSTS 0xF4
#define REG_TSTHRRQPI 0xF5
#define REG_CTCTRL 0xF7
#define REG_TSTIMER 0xF8
struct i5500_temp_data {
struct device *hwmon_dev;
const char *name;
};
/*
* Sysfs stuff
*/
/* Sensor resolution : 0.5 degree C */
static ssize_t show_temp(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct pci_dev *pdev = to_pci_dev(dev);
long temp;
u16 tsthrhi;
s8 tsfsc;
pci_read_config_word(pdev, REG_TSTHRHI, &tsthrhi);
pci_read_config_byte(pdev, REG_TSFSC, &tsfsc);
temp = ((long)tsthrhi - tsfsc) * 500;
return sprintf(buf, "%ld\n", temp);
}
static ssize_t show_thresh(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct pci_dev *pdev = to_pci_dev(dev);
int reg = to_sensor_dev_attr(devattr)->index;
long temp;
u16 tsthr;
pci_read_config_word(pdev, reg, &tsthr);
temp = tsthr * 500;
return sprintf(buf, "%ld\n", temp);
}
static ssize_t show_alarm(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct pci_dev *pdev = to_pci_dev(dev);
int nr = to_sensor_dev_attr(devattr)->index;
u8 ctsts;
pci_read_config_byte(pdev, REG_CTSTS, &ctsts);
return sprintf(buf, "%u\n", (unsigned int)ctsts & (1 << nr));
}
static ssize_t show_name(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct i5500_temp_data *data = dev_get_drvdata(dev);
return sprintf(buf, "%s\n", data->name);
}
static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_thresh, NULL, 0xE2);
static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO, show_thresh, NULL, 0xEC);
static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_thresh, NULL, 0xEE);
static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 1);
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
static struct attribute *i5500_temp_attributes[] = {
&dev_attr_temp1_input.attr,
&sensor_dev_attr_temp1_crit.dev_attr.attr,
&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
&dev_attr_name.attr,
NULL
};
static const struct attribute_group i5500_temp_group = {
.attrs = i5500_temp_attributes,
};
static const struct pci_device_id i5500_temp_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x3438) },
{ 0 },
};
MODULE_DEVICE_TABLE(pci, i5500_temp_ids);
static int i5500_temp_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
int err;
struct i5500_temp_data *data;
data = kzalloc(sizeof(struct i5500_temp_data), GFP_KERNEL);
if (!data) {
err = -ENOMEM;
goto exit;
}
data->name = "intel5500";
dev_set_drvdata(&pdev->dev, data);
err = pci_enable_device(pdev);
if (err) {
dev_err(&pdev->dev, "Failed to enable device\n");
goto exit_free;
}
/* Register sysfs hooks */
err = sysfs_create_group(&pdev->dev.kobj, &i5500_temp_group);
if (err)
goto exit_free;
data->hwmon_dev = hwmon_device_register(&pdev->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto exit_remove;
}
return 0;
exit_remove:
sysfs_remove_group(&pdev->dev.kobj, &i5500_temp_group);
exit_free:
kfree(data);
exit:
return err;
}
static void i5500_temp_remove(struct pci_dev *pdev)
{
struct i5500_temp_data *data = dev_get_drvdata(&pdev->dev);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&pdev->dev.kobj, &i5500_temp_group);
kfree(data);
}
static struct pci_driver i5500_temp_driver = {
.name = "i5500_temp",
.id_table = i5500_temp_ids,
.probe = i5500_temp_probe,
.remove = i5500_temp_remove,
};
static int __init i5500_temp_init(void)
{
return pci_register_driver(&i5500_temp_driver);
}
static void __exit i5500_temp_exit(void)
{
pci_unregister_driver(&i5500_temp_driver);
}
MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
MODULE_DESCRIPTION("Intel 5500/5520/X58 chipset thermal sensor driver");
MODULE_LICENSE("GPL");
module_init(i5500_temp_init)
module_exit(i5500_temp_exit)
|
