1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2013 Matthew Garrett <mjg59@srcf.ucam.org>
4 */
5
6 #include <linux/acpi.h>
7 #include <linux/module.h>
8 #include <linux/slab.h>
9
10 MODULE_LICENSE("GPL");
11
irst_show_wakeup_events(struct device * dev,struct device_attribute * attr,char * buf)12 static ssize_t irst_show_wakeup_events(struct device *dev,
13 struct device_attribute *attr,
14 char *buf)
15 {
16 struct acpi_device *acpi;
17 unsigned long long value;
18 acpi_status status;
19
20 acpi = to_acpi_device(dev);
21
22 status = acpi_evaluate_integer(acpi->handle, "GFFS", NULL, &value);
23 if (ACPI_FAILURE(status))
24 return -EINVAL;
25
26 return sprintf(buf, "%lld\n", value);
27 }
28
irst_store_wakeup_events(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)29 static ssize_t irst_store_wakeup_events(struct device *dev,
30 struct device_attribute *attr,
31 const char *buf, size_t count)
32 {
33 struct acpi_device *acpi;
34 acpi_status status;
35 unsigned long value;
36 int error;
37
38 acpi = to_acpi_device(dev);
39
40 error = kstrtoul(buf, 0, &value);
41 if (error)
42 return error;
43
44 status = acpi_execute_simple_method(acpi->handle, "SFFS", value);
45 if (ACPI_FAILURE(status))
46 return -EINVAL;
47
48 return count;
49 }
50
51 static struct device_attribute irst_wakeup_attr = {
52 .attr = { .name = "wakeup_events", .mode = 0600 },
53 .show = irst_show_wakeup_events,
54 .store = irst_store_wakeup_events
55 };
56
irst_show_wakeup_time(struct device * dev,struct device_attribute * attr,char * buf)57 static ssize_t irst_show_wakeup_time(struct device *dev,
58 struct device_attribute *attr, char *buf)
59 {
60 struct acpi_device *acpi;
61 unsigned long long value;
62 acpi_status status;
63
64 acpi = to_acpi_device(dev);
65
66 status = acpi_evaluate_integer(acpi->handle, "GFTV", NULL, &value);
67 if (ACPI_FAILURE(status))
68 return -EINVAL;
69
70 return sprintf(buf, "%lld\n", value);
71 }
72
irst_store_wakeup_time(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)73 static ssize_t irst_store_wakeup_time(struct device *dev,
74 struct device_attribute *attr,
75 const char *buf, size_t count)
76 {
77 struct acpi_device *acpi;
78 acpi_status status;
79 unsigned long value;
80 int error;
81
82 acpi = to_acpi_device(dev);
83
84 error = kstrtoul(buf, 0, &value);
85 if (error)
86 return error;
87
88 status = acpi_execute_simple_method(acpi->handle, "SFTV", value);
89 if (ACPI_FAILURE(status))
90 return -EINVAL;
91
92 return count;
93 }
94
95 static struct device_attribute irst_timeout_attr = {
96 .attr = { .name = "wakeup_time", .mode = 0600 },
97 .show = irst_show_wakeup_time,
98 .store = irst_store_wakeup_time
99 };
100
irst_add(struct acpi_device * acpi)101 static int irst_add(struct acpi_device *acpi)
102 {
103 int error;
104
105 error = device_create_file(&acpi->dev, &irst_timeout_attr);
106 if (unlikely(error))
107 return error;
108
109 error = device_create_file(&acpi->dev, &irst_wakeup_attr);
110 if (unlikely(error))
111 device_remove_file(&acpi->dev, &irst_timeout_attr);
112
113 return error;
114 }
115
irst_remove(struct acpi_device * acpi)116 static int irst_remove(struct acpi_device *acpi)
117 {
118 device_remove_file(&acpi->dev, &irst_wakeup_attr);
119 device_remove_file(&acpi->dev, &irst_timeout_attr);
120
121 return 0;
122 }
123
124 static const struct acpi_device_id irst_ids[] = {
125 {"INT3392", 0},
126 {"", 0}
127 };
128
129 static struct acpi_driver irst_driver = {
130 .owner = THIS_MODULE,
131 .name = "intel_rapid_start",
132 .class = "intel_rapid_start",
133 .ids = irst_ids,
134 .ops = {
135 .add = irst_add,
136 .remove = irst_remove,
137 },
138 };
139
140 module_acpi_driver(irst_driver);
141
142 MODULE_DEVICE_TABLE(acpi, irst_ids);
143