1 /*
2 * Copyright 2013 Matthew Garrett <mjg59@srcf.ucam.org>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 */
18
19
20 #include <linux/init.h>
21 #include <linux/module.h>
22 #include <linux/slab.h>
23 #include <linux/acpi.h>
24
25 MODULE_LICENSE("GPL");
26
irst_show_wakeup_events(struct device * dev,struct device_attribute * attr,char * buf)27 static ssize_t irst_show_wakeup_events(struct device *dev,
28 struct device_attribute *attr,
29 char *buf)
30 {
31 struct acpi_device *acpi;
32 unsigned long long value;
33 acpi_status status;
34
35 acpi = to_acpi_device(dev);
36
37 status = acpi_evaluate_integer(acpi->handle, "GFFS", NULL, &value);
38 if (ACPI_FAILURE(status))
39 return -EINVAL;
40
41 return sprintf(buf, "%lld\n", value);
42 }
43
irst_store_wakeup_events(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)44 static ssize_t irst_store_wakeup_events(struct device *dev,
45 struct device_attribute *attr,
46 const char *buf, size_t count)
47 {
48 struct acpi_device *acpi;
49 acpi_status status;
50 unsigned long value;
51 int error;
52
53 acpi = to_acpi_device(dev);
54
55 error = kstrtoul(buf, 0, &value);
56
57 if (error)
58 return error;
59
60 status = acpi_execute_simple_method(acpi->handle, "SFFS", value);
61
62 if (ACPI_FAILURE(status))
63 return -EINVAL;
64
65 return count;
66 }
67
68 static struct device_attribute irst_wakeup_attr = {
69 .attr = { .name = "wakeup_events", .mode = 0600 },
70 .show = irst_show_wakeup_events,
71 .store = irst_store_wakeup_events
72 };
73
irst_show_wakeup_time(struct device * dev,struct device_attribute * attr,char * buf)74 static ssize_t irst_show_wakeup_time(struct device *dev,
75 struct device_attribute *attr, char *buf)
76 {
77 struct acpi_device *acpi;
78 unsigned long long value;
79 acpi_status status;
80
81 acpi = to_acpi_device(dev);
82
83 status = acpi_evaluate_integer(acpi->handle, "GFTV", NULL, &value);
84 if (ACPI_FAILURE(status))
85 return -EINVAL;
86
87 return sprintf(buf, "%lld\n", value);
88 }
89
irst_store_wakeup_time(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)90 static ssize_t irst_store_wakeup_time(struct device *dev,
91 struct device_attribute *attr,
92 const char *buf, size_t count)
93 {
94 struct acpi_device *acpi;
95 acpi_status status;
96 unsigned long value;
97 int error;
98
99 acpi = to_acpi_device(dev);
100
101 error = kstrtoul(buf, 0, &value);
102
103 if (error)
104 return error;
105
106 status = acpi_execute_simple_method(acpi->handle, "SFTV", value);
107
108 if (ACPI_FAILURE(status))
109 return -EINVAL;
110
111 return count;
112 }
113
114 static struct device_attribute irst_timeout_attr = {
115 .attr = { .name = "wakeup_time", .mode = 0600 },
116 .show = irst_show_wakeup_time,
117 .store = irst_store_wakeup_time
118 };
119
irst_add(struct acpi_device * acpi)120 static int irst_add(struct acpi_device *acpi)
121 {
122 int error;
123
124 error = device_create_file(&acpi->dev, &irst_timeout_attr);
125 if (unlikely(error))
126 return error;
127
128 error = device_create_file(&acpi->dev, &irst_wakeup_attr);
129 if (unlikely(error))
130 device_remove_file(&acpi->dev, &irst_timeout_attr);
131
132 return error;
133 }
134
irst_remove(struct acpi_device * acpi)135 static int irst_remove(struct acpi_device *acpi)
136 {
137 device_remove_file(&acpi->dev, &irst_wakeup_attr);
138 device_remove_file(&acpi->dev, &irst_timeout_attr);
139
140 return 0;
141 }
142
143 static const struct acpi_device_id irst_ids[] = {
144 {"INT3392", 0},
145 {"", 0}
146 };
147
148 static struct acpi_driver irst_driver = {
149 .owner = THIS_MODULE,
150 .name = "intel_rapid_start",
151 .class = "intel_rapid_start",
152 .ids = irst_ids,
153 .ops = {
154 .add = irst_add,
155 .remove = irst_remove,
156 },
157 };
158
159 module_acpi_driver(irst_driver);
160
161 MODULE_DEVICE_TABLE(acpi, irst_ids);
162