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14#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/init.h>
19#include <linux/slab.h>
20#include <linux/acpi.h>
21#include <linux/input.h>
22#include <linux/input/sparse-keymap.h>
23
24#define ACPI_TOPSTAR_CLASS "topstar"
25
26struct topstar_hkey {
27 struct input_dev *inputdev;
28};
29
30static const struct key_entry topstar_keymap[] = {
31 { KE_KEY, 0x80, { KEY_BRIGHTNESSUP } },
32 { KE_KEY, 0x81, { KEY_BRIGHTNESSDOWN } },
33 { KE_KEY, 0x83, { KEY_VOLUMEUP } },
34 { KE_KEY, 0x84, { KEY_VOLUMEDOWN } },
35 { KE_KEY, 0x85, { KEY_MUTE } },
36 { KE_KEY, 0x86, { KEY_SWITCHVIDEOMODE } },
37 { KE_KEY, 0x87, { KEY_F13 } },
38 { KE_KEY, 0x88, { KEY_WLAN } },
39 { KE_KEY, 0x8a, { KEY_WWW } },
40 { KE_KEY, 0x8b, { KEY_MAIL } },
41 { KE_KEY, 0x8c, { KEY_MEDIA } },
42
43
44 { KE_IGNORE, 0x8e, },
45 { KE_IGNORE, 0x8f, },
46 { KE_IGNORE, 0x90, },
47
48
49
50
51
52
53 { KE_KEY, 0x96, { KEY_F14 } },
54 { KE_KEY, 0x97, { KEY_F14 } },
55
56 { KE_END, 0 }
57};
58
59static void acpi_topstar_notify(struct acpi_device *device, u32 event)
60{
61 static bool dup_evnt[2];
62 bool *dup;
63 struct topstar_hkey *hkey = acpi_driver_data(device);
64
65
66 if (event == 0x83 || event == 0x84) {
67 dup = &dup_evnt[event - 0x83];
68 if (*dup) {
69 *dup = false;
70 return;
71 }
72 *dup = true;
73 }
74
75 if (!sparse_keymap_report_event(hkey->inputdev, event, 1, true))
76 pr_info("unknown event = 0x%02x\n", event);
77}
78
79static int acpi_topstar_fncx_switch(struct acpi_device *device, bool state)
80{
81 acpi_status status;
82 union acpi_object fncx_params[1] = {
83 { .type = ACPI_TYPE_INTEGER }
84 };
85 struct acpi_object_list fncx_arg_list = { 1, &fncx_params[0] };
86
87 fncx_params[0].integer.value = state ? 0x86 : 0x87;
88 status = acpi_evaluate_object(device->handle, "FNCX", &fncx_arg_list, NULL);
89 if (ACPI_FAILURE(status)) {
90 pr_err("Unable to switch FNCX notifications\n");
91 return -ENODEV;
92 }
93
94 return 0;
95}
96
97static int acpi_topstar_init_hkey(struct topstar_hkey *hkey)
98{
99 struct input_dev *input;
100 int error;
101
102 input = input_allocate_device();
103 if (!input) {
104 pr_err("Unable to allocate input device\n");
105 return -ENOMEM;
106 }
107
108 input->name = "Topstar Laptop extra buttons";
109 input->phys = "topstar/input0";
110 input->id.bustype = BUS_HOST;
111
112 error = sparse_keymap_setup(input, topstar_keymap, NULL);
113 if (error) {
114 pr_err("Unable to setup input device keymap\n");
115 goto err_free_dev;
116 }
117
118 error = input_register_device(input);
119 if (error) {
120 pr_err("Unable to register input device\n");
121 goto err_free_keymap;
122 }
123
124 hkey->inputdev = input;
125 return 0;
126
127 err_free_keymap:
128 sparse_keymap_free(input);
129 err_free_dev:
130 input_free_device(input);
131 return error;
132}
133
134static int acpi_topstar_add(struct acpi_device *device)
135{
136 struct topstar_hkey *tps_hkey;
137
138 tps_hkey = kzalloc(sizeof(struct topstar_hkey), GFP_KERNEL);
139 if (!tps_hkey)
140 return -ENOMEM;
141
142 strcpy(acpi_device_name(device), "Topstar TPSACPI");
143 strcpy(acpi_device_class(device), ACPI_TOPSTAR_CLASS);
144
145 if (acpi_topstar_fncx_switch(device, true))
146 goto add_err;
147
148 if (acpi_topstar_init_hkey(tps_hkey))
149 goto add_err;
150
151 device->driver_data = tps_hkey;
152 return 0;
153
154add_err:
155 kfree(tps_hkey);
156 return -ENODEV;
157}
158
159static int acpi_topstar_remove(struct acpi_device *device, int type)
160{
161 struct topstar_hkey *tps_hkey = acpi_driver_data(device);
162
163 acpi_topstar_fncx_switch(device, false);
164
165 sparse_keymap_free(tps_hkey->inputdev);
166 input_unregister_device(tps_hkey->inputdev);
167 kfree(tps_hkey);
168
169 return 0;
170}
171
172static const struct acpi_device_id topstar_device_ids[] = {
173 { "TPSACPI01", 0 },
174 { "", 0 },
175};
176MODULE_DEVICE_TABLE(acpi, topstar_device_ids);
177
178static struct acpi_driver acpi_topstar_driver = {
179 .name = "Topstar laptop ACPI driver",
180 .class = ACPI_TOPSTAR_CLASS,
181 .ids = topstar_device_ids,
182 .ops = {
183 .add = acpi_topstar_add,
184 .remove = acpi_topstar_remove,
185 .notify = acpi_topstar_notify,
186 },
187};
188
189static int __init topstar_laptop_init(void)
190{
191 int ret;
192
193 ret = acpi_bus_register_driver(&acpi_topstar_driver);
194 if (ret < 0)
195 return ret;
196
197 printk(KERN_INFO "Topstar Laptop ACPI extras driver loaded\n");
198
199 return 0;
200}
201
202static void __exit topstar_laptop_exit(void)
203{
204 acpi_bus_unregister_driver(&acpi_topstar_driver);
205}
206
207module_init(topstar_laptop_init);
208module_exit(topstar_laptop_exit);
209
210MODULE_AUTHOR("Herton Ronaldo Krzesinski");
211MODULE_DESCRIPTION("Topstar Laptop ACPI Extras driver");
212MODULE_LICENSE("GPL");
213
