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13
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, 0x82, },
45 { KE_IGNORE, 0x8e, },
46 { KE_IGNORE, 0x8f, },
47 { KE_IGNORE, 0x90, },
48
49
50
51
52
53
54 { KE_KEY, 0x96, { KEY_F14 } },
55 { KE_KEY, 0x97, { KEY_F14 } },
56
57 { KE_END, 0 }
58};
59
60static void acpi_topstar_notify(struct acpi_device *device, u32 event)
61{
62 static bool dup_evnt[2];
63 bool *dup;
64 struct topstar_hkey *hkey = acpi_driver_data(device);
65
66
67 if (event == 0x83 || event == 0x84) {
68 dup = &dup_evnt[event - 0x83];
69 if (*dup) {
70 *dup = false;
71 return;
72 }
73 *dup = true;
74 }
75
76 if (!sparse_keymap_report_event(hkey->inputdev, event, 1, true))
77 pr_info("unknown event = 0x%02x\n", event);
78}
79
80static int acpi_topstar_fncx_switch(struct acpi_device *device, bool state)
81{
82 acpi_status status;
83 union acpi_object fncx_params[1] = {
84 { .type = ACPI_TYPE_INTEGER }
85 };
86 struct acpi_object_list fncx_arg_list = { 1, &fncx_params[0] };
87
88 fncx_params[0].integer.value = state ? 0x86 : 0x87;
89 status = acpi_evaluate_object(device->handle, "FNCX", &fncx_arg_list, NULL);
90 if (ACPI_FAILURE(status)) {
91 pr_err("Unable to switch FNCX notifications\n");
92 return -ENODEV;
93 }
94
95 return 0;
96}
97
98static int acpi_topstar_init_hkey(struct topstar_hkey *hkey)
99{
100 struct input_dev *input;
101 int error;
102
103 input = input_allocate_device();
104 if (!input) {
105 pr_err("Unable to allocate input device\n");
106 return -ENOMEM;
107 }
108
109 input->name = "Topstar Laptop extra buttons";
110 input->phys = "topstar/input0";
111 input->id.bustype = BUS_HOST;
112
113 error = sparse_keymap_setup(input, topstar_keymap, NULL);
114 if (error) {
115 pr_err("Unable to setup input device keymap\n");
116 goto err_free_dev;
117 }
118
119 error = input_register_device(input);
120 if (error) {
121 pr_err("Unable to register input device\n");
122 goto err_free_keymap;
123 }
124
125 hkey->inputdev = input;
126 return 0;
127
128 err_free_keymap:
129 sparse_keymap_free(input);
130 err_free_dev:
131 input_free_device(input);
132 return error;
133}
134
135static int acpi_topstar_add(struct acpi_device *device)
136{
137 struct topstar_hkey *tps_hkey;
138
139 tps_hkey = kzalloc(sizeof(struct topstar_hkey), GFP_KERNEL);
140 if (!tps_hkey)
141 return -ENOMEM;
142
143 strcpy(acpi_device_name(device), "Topstar TPSACPI");
144 strcpy(acpi_device_class(device), ACPI_TOPSTAR_CLASS);
145
146 if (acpi_topstar_fncx_switch(device, true))
147 goto add_err;
148
149 if (acpi_topstar_init_hkey(tps_hkey))
150 goto add_err;
151
152 device->driver_data = tps_hkey;
153 return 0;
154
155add_err:
156 kfree(tps_hkey);
157 return -ENODEV;
158}
159
160static int acpi_topstar_remove(struct acpi_device *device, int type)
161{
162 struct topstar_hkey *tps_hkey = acpi_driver_data(device);
163
164 acpi_topstar_fncx_switch(device, false);
165
166 sparse_keymap_free(tps_hkey->inputdev);
167 input_unregister_device(tps_hkey->inputdev);
168 kfree(tps_hkey);
169
170 return 0;
171}
172
173static const struct acpi_device_id topstar_device_ids[] = {
174 { "TPSACPI01", 0 },
175 { "", 0 },
176};
177MODULE_DEVICE_TABLE(acpi, topstar_device_ids);
178
179static struct acpi_driver acpi_topstar_driver = {
180 .name = "Topstar laptop ACPI driver",
181 .class = ACPI_TOPSTAR_CLASS,
182 .ids = topstar_device_ids,
183 .ops = {
184 .add = acpi_topstar_add,
185 .remove = acpi_topstar_remove,
186 .notify = acpi_topstar_notify,
187 },
188};
189module_acpi_driver(acpi_topstar_driver);
190
191MODULE_AUTHOR("Herton Ronaldo Krzesinski");
192MODULE_DESCRIPTION("Topstar Laptop ACPI Extras driver");
193MODULE_LICENSE("GPL");
194
