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ada07281 JD |
1 | /* |
2 | * i5500_temp - Driver for Intel 5500/5520/X58 chipset thermal sensor | |
3 | * | |
4 | * Copyright (C) 2012, 2014 Jean Delvare <jdelvare@suse.de> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | */ | |
16 | ||
17 | #include <linux/module.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/jiffies.h> | |
b8d48ce9 | 21 | #include <linux/device.h> |
ada07281 JD |
22 | #include <linux/pci.h> |
23 | #include <linux/hwmon.h> | |
24 | #include <linux/hwmon-sysfs.h> | |
25 | #include <linux/err.h> | |
26 | #include <linux/mutex.h> | |
27 | ||
28 | /* Register definitions from datasheet */ | |
29 | #define REG_TSTHRCATA 0xE2 | |
30 | #define REG_TSCTRL 0xE8 | |
31 | #define REG_TSTHRRPEX 0xEB | |
32 | #define REG_TSTHRLO 0xEC | |
33 | #define REG_TSTHRHI 0xEE | |
34 | #define REG_CTHINT 0xF0 | |
35 | #define REG_TSFSC 0xF3 | |
36 | #define REG_CTSTS 0xF4 | |
37 | #define REG_TSTHRRQPI 0xF5 | |
38 | #define REG_CTCTRL 0xF7 | |
39 | #define REG_TSTIMER 0xF8 | |
40 | ||
ada07281 JD |
41 | /* |
42 | * Sysfs stuff | |
43 | */ | |
44 | ||
45 | /* Sensor resolution : 0.5 degree C */ | |
46 | static ssize_t show_temp(struct device *dev, | |
47 | struct device_attribute *devattr, char *buf) | |
48 | { | |
b8d48ce9 | 49 | struct pci_dev *pdev = to_pci_dev(dev->parent); |
ada07281 JD |
50 | long temp; |
51 | u16 tsthrhi; | |
52 | s8 tsfsc; | |
53 | ||
54 | pci_read_config_word(pdev, REG_TSTHRHI, &tsthrhi); | |
55 | pci_read_config_byte(pdev, REG_TSFSC, &tsfsc); | |
56 | temp = ((long)tsthrhi - tsfsc) * 500; | |
57 | ||
58 | return sprintf(buf, "%ld\n", temp); | |
59 | } | |
60 | ||
61 | static ssize_t show_thresh(struct device *dev, | |
62 | struct device_attribute *devattr, char *buf) | |
63 | { | |
b8d48ce9 | 64 | struct pci_dev *pdev = to_pci_dev(dev->parent); |
ada07281 JD |
65 | int reg = to_sensor_dev_attr(devattr)->index; |
66 | long temp; | |
67 | u16 tsthr; | |
68 | ||
69 | pci_read_config_word(pdev, reg, &tsthr); | |
70 | temp = tsthr * 500; | |
71 | ||
72 | return sprintf(buf, "%ld\n", temp); | |
73 | } | |
74 | ||
75 | static ssize_t show_alarm(struct device *dev, | |
76 | struct device_attribute *devattr, char *buf) | |
77 | { | |
b8d48ce9 | 78 | struct pci_dev *pdev = to_pci_dev(dev->parent); |
ada07281 JD |
79 | int nr = to_sensor_dev_attr(devattr)->index; |
80 | u8 ctsts; | |
81 | ||
82 | pci_read_config_byte(pdev, REG_CTSTS, &ctsts); | |
83 | return sprintf(buf, "%u\n", (unsigned int)ctsts & (1 << nr)); | |
84 | } | |
85 | ||
ada07281 JD |
86 | static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); |
87 | static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_thresh, NULL, 0xE2); | |
88 | static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO, show_thresh, NULL, 0xEC); | |
89 | static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_thresh, NULL, 0xEE); | |
90 | static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0); | |
91 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 1); | |
ada07281 | 92 | |
86c725e3 | 93 | static struct attribute *i5500_temp_attrs[] = { |
ada07281 JD |
94 | &dev_attr_temp1_input.attr, |
95 | &sensor_dev_attr_temp1_crit.dev_attr.attr, | |
96 | &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, | |
97 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
98 | &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, | |
99 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
ada07281 JD |
100 | NULL |
101 | }; | |
102 | ||
86c725e3 | 103 | ATTRIBUTE_GROUPS(i5500_temp); |
b8d48ce9 | 104 | |
ada07281 JD |
105 | static const struct pci_device_id i5500_temp_ids[] = { |
106 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x3438) }, | |
107 | { 0 }, | |
108 | }; | |
109 | ||
110 | MODULE_DEVICE_TABLE(pci, i5500_temp_ids); | |
111 | ||
112 | static int i5500_temp_probe(struct pci_dev *pdev, | |
113 | const struct pci_device_id *id) | |
114 | { | |
115 | int err; | |
b8d48ce9 | 116 | struct device *hwmon_dev; |
e3d98203 JD |
117 | u32 tstimer; |
118 | s8 tsfsc; | |
ada07281 JD |
119 | |
120 | err = pci_enable_device(pdev); | |
121 | if (err) { | |
122 | dev_err(&pdev->dev, "Failed to enable device\n"); | |
b8d48ce9 | 123 | return err; |
ada07281 JD |
124 | } |
125 | ||
e3d98203 JD |
126 | pci_read_config_byte(pdev, REG_TSFSC, &tsfsc); |
127 | pci_read_config_dword(pdev, REG_TSTIMER, &tstimer); | |
128 | if (tsfsc == 0x7F && tstimer == 0x07D30D40) { | |
86c725e3 | 129 | dev_notice(&pdev->dev, "Sensor seems to be disabled\n"); |
e3d98203 JD |
130 | return -ENODEV; |
131 | } | |
132 | ||
b8d48ce9 JD |
133 | hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, |
134 | "intel5500", NULL, | |
135 | i5500_temp_groups); | |
136 | return PTR_ERR_OR_ZERO(hwmon_dev); | |
ada07281 JD |
137 | } |
138 | ||
139 | static struct pci_driver i5500_temp_driver = { | |
140 | .name = "i5500_temp", | |
141 | .id_table = i5500_temp_ids, | |
142 | .probe = i5500_temp_probe, | |
ada07281 JD |
143 | }; |
144 | ||
aef64d0d | 145 | module_pci_driver(i5500_temp_driver); |
ada07281 JD |
146 | |
147 | MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); | |
148 | MODULE_DESCRIPTION("Intel 5500/5520/X58 chipset thermal sensor driver"); | |
149 | MODULE_LICENSE("GPL"); |