Commit | Line | Data |
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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
ada07281 JD |
2 | /* |
3 | * i5500_temp - Driver for Intel 5500/5520/X58 chipset thermal sensor | |
4 | * | |
5 | * Copyright (C) 2012, 2014 Jean Delvare <jdelvare@suse.de> | |
ada07281 JD |
6 | */ |
7 | ||
6665e10a | 8 | #include <linux/bitops.h> |
ada07281 JD |
9 | #include <linux/module.h> |
10 | #include <linux/init.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/jiffies.h> | |
b8d48ce9 | 13 | #include <linux/device.h> |
ada07281 JD |
14 | #include <linux/pci.h> |
15 | #include <linux/hwmon.h> | |
ada07281 JD |
16 | #include <linux/err.h> |
17 | #include <linux/mutex.h> | |
18 | ||
19 | /* Register definitions from datasheet */ | |
20 | #define REG_TSTHRCATA 0xE2 | |
21 | #define REG_TSCTRL 0xE8 | |
22 | #define REG_TSTHRRPEX 0xEB | |
23 | #define REG_TSTHRLO 0xEC | |
24 | #define REG_TSTHRHI 0xEE | |
25 | #define REG_CTHINT 0xF0 | |
26 | #define REG_TSFSC 0xF3 | |
27 | #define REG_CTSTS 0xF4 | |
28 | #define REG_TSTHRRQPI 0xF5 | |
29 | #define REG_CTCTRL 0xF7 | |
30 | #define REG_TSTIMER 0xF8 | |
31 | ||
6665e10a AW |
32 | static umode_t i5500_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr, |
33 | int channel) | |
ada07281 | 34 | { |
6665e10a | 35 | return 0444; |
ada07281 JD |
36 | } |
37 | ||
6665e10a AW |
38 | static int i5500_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, |
39 | long *val) | |
ada07281 | 40 | { |
b8d48ce9 | 41 | struct pci_dev *pdev = to_pci_dev(dev->parent); |
ada07281 | 42 | u16 tsthr; |
6665e10a AW |
43 | s8 tsfsc; |
44 | u8 ctsts; | |
ada07281 | 45 | |
6665e10a AW |
46 | switch (type) { |
47 | case hwmon_temp: | |
48 | switch (attr) { | |
49 | /* Sensor resolution : 0.5 degree C */ | |
50 | case hwmon_temp_input: | |
51 | pci_read_config_word(pdev, REG_TSTHRHI, &tsthr); | |
52 | pci_read_config_byte(pdev, REG_TSFSC, &tsfsc); | |
53 | *val = (tsthr - tsfsc) * 500; | |
54 | return 0; | |
55 | case hwmon_temp_max: | |
56 | pci_read_config_word(pdev, REG_TSTHRHI, &tsthr); | |
57 | *val = tsthr * 500; | |
58 | return 0; | |
59 | case hwmon_temp_max_hyst: | |
60 | pci_read_config_word(pdev, REG_TSTHRLO, &tsthr); | |
61 | *val = tsthr * 500; | |
62 | return 0; | |
63 | case hwmon_temp_crit: | |
64 | pci_read_config_word(pdev, REG_TSTHRCATA, &tsthr); | |
65 | *val = tsthr * 500; | |
66 | return 0; | |
67 | case hwmon_temp_max_alarm: | |
68 | pci_read_config_byte(pdev, REG_CTSTS, &ctsts); | |
69 | *val = !!(ctsts & BIT(1)); | |
70 | return 0; | |
71 | case hwmon_temp_crit_alarm: | |
72 | pci_read_config_byte(pdev, REG_CTSTS, &ctsts); | |
73 | *val = !!(ctsts & BIT(0)); | |
74 | return 0; | |
75 | default: | |
76 | break; | |
77 | } | |
78 | break; | |
79 | default: | |
80 | break; | |
81 | } | |
ada07281 | 82 | |
6665e10a | 83 | return -EOPNOTSUPP; |
ada07281 JD |
84 | } |
85 | ||
6665e10a AW |
86 | static const struct hwmon_ops i5500_ops = { |
87 | .is_visible = i5500_is_visible, | |
88 | .read = i5500_read, | |
89 | }; | |
ada07281 | 90 | |
6665e10a AW |
91 | static const struct hwmon_channel_info *i5500_info[] = { |
92 | HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ), | |
93 | HWMON_CHANNEL_INFO(temp, | |
94 | HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | HWMON_T_CRIT | | |
95 | HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | |
96 | ), | |
ada07281 JD |
97 | NULL |
98 | }; | |
99 | ||
6665e10a AW |
100 | static const struct hwmon_chip_info i5500_chip_info = { |
101 | .ops = &i5500_ops, | |
102 | .info = i5500_info, | |
103 | }; | |
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 | 119 | |
3b7f98f2 | 120 | err = pcim_enable_device(pdev); |
ada07281 JD |
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 | ||
6665e10a AW |
133 | hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, "intel5500", NULL, |
134 | &i5500_chip_info, NULL); | |
b8d48ce9 | 135 | return PTR_ERR_OR_ZERO(hwmon_dev); |
ada07281 JD |
136 | } |
137 | ||
138 | static struct pci_driver i5500_temp_driver = { | |
139 | .name = "i5500_temp", | |
140 | .id_table = i5500_temp_ids, | |
141 | .probe = i5500_temp_probe, | |
ada07281 JD |
142 | }; |
143 | ||
aef64d0d | 144 | module_pci_driver(i5500_temp_driver); |
ada07281 JD |
145 | |
146 | MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); | |
147 | MODULE_DESCRIPTION("Intel 5500/5520/X58 chipset thermal sensor driver"); | |
148 | MODULE_LICENSE("GPL"); |