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9caeb532 HRK |
1 | /* |
2 | * ACPI driver for Topstar notebooks (hotkeys support only) | |
3 | * | |
4 | * Copyright (c) 2009 Herton Ronaldo Krzesinski <herton@mandriva.com.br> | |
5 | * | |
6 | * Implementation inspired by existing x86 platform drivers, in special | |
7 | * asus/eepc/fujitsu-laptop, thanks to their authors | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
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> | |
5a0e3ad6 | 19 | #include <linux/slab.h> |
9caeb532 HRK |
20 | #include <linux/acpi.h> |
21 | #include <linux/input.h> | |
97490f1c | 22 | #include <linux/input/sparse-keymap.h> |
9caeb532 HRK |
23 | |
24 | #define ACPI_TOPSTAR_CLASS "topstar" | |
25 | ||
26 | struct topstar_hkey { | |
27 | struct input_dev *inputdev; | |
28 | }; | |
29 | ||
97490f1c DT |
30 | static 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 } }, /* touchpad enable/disable key */ | |
38 | { KE_KEY, 0x88, { KEY_WLAN } }, | |
39 | { KE_KEY, 0x8a, { KEY_WWW } }, | |
40 | { KE_KEY, 0x8b, { KEY_MAIL } }, | |
41 | { KE_KEY, 0x8c, { KEY_MEDIA } }, | |
9caeb532 | 42 | |
97490f1c DT |
43 | /* Known non hotkey events don't handled or that we don't care yet */ |
44 | { KE_IGNORE, 0x8e, }, | |
45 | { KE_IGNORE, 0x8f, }, | |
46 | { KE_IGNORE, 0x90, }, | |
9caeb532 | 47 | |
97490f1c DT |
48 | /* |
49 | * 'G key' generate two event codes, convert to only | |
50 | * one event/key code for now, consider replacing by | |
51 | * a switch (3G switch - SW_3G?) | |
52 | */ | |
53 | { KE_KEY, 0x96, { KEY_F14 } }, | |
54 | { KE_KEY, 0x97, { KEY_F14 } }, | |
9caeb532 | 55 | |
97490f1c DT |
56 | { KE_END, 0 } |
57 | }; | |
9caeb532 HRK |
58 | |
59 | static void acpi_topstar_notify(struct acpi_device *device, u32 event) | |
60 | { | |
9caeb532 HRK |
61 | static bool dup_evnt[2]; |
62 | bool *dup; | |
63 | struct topstar_hkey *hkey = acpi_driver_data(device); | |
64 | ||
65 | /* 0x83 and 0x84 key events comes duplicated... */ | |
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 | ||
97490f1c DT |
75 | if (!sparse_keymap_report_event(hkey->inputdev, event, 1, true)) |
76 | pr_info("unknown event = 0x%02x\n", event); | |
9caeb532 HRK |
77 | } |
78 | ||
79 | static 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 | ||
9caeb532 HRK |
97 | static int acpi_topstar_init_hkey(struct topstar_hkey *hkey) |
98 | { | |
97490f1c DT |
99 | struct input_dev *input; |
100 | int error; | |
9caeb532 | 101 | |
97490f1c DT |
102 | input = input_allocate_device(); |
103 | if (!input) { | |
9caeb532 | 104 | pr_err("Unable to allocate input device\n"); |
97490f1c | 105 | return -ENOMEM; |
9caeb532 | 106 | } |
97490f1c DT |
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; | |
9caeb532 | 116 | } |
97490f1c DT |
117 | |
118 | error = input_register_device(input); | |
119 | if (error) { | |
9caeb532 | 120 | pr_err("Unable to register input device\n"); |
97490f1c | 121 | goto err_free_keymap; |
9caeb532 HRK |
122 | } |
123 | ||
97490f1c | 124 | hkey->inputdev = input; |
9caeb532 | 125 | return 0; |
97490f1c DT |
126 | |
127 | err_free_keymap: | |
128 | sparse_keymap_free(input); | |
129 | err_free_dev: | |
130 | input_free_device(input); | |
131 | return error; | |
9caeb532 HRK |
132 | } |
133 | ||
134 | static 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 | ||
154 | add_err: | |
155 | kfree(tps_hkey); | |
156 | return -ENODEV; | |
157 | } | |
158 | ||
159 | static 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 | ||
97490f1c | 165 | sparse_keymap_free(tps_hkey->inputdev); |
9caeb532 HRK |
166 | input_unregister_device(tps_hkey->inputdev); |
167 | kfree(tps_hkey); | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
172 | static const struct acpi_device_id topstar_device_ids[] = { | |
173 | { "TPSACPI01", 0 }, | |
174 | { "", 0 }, | |
175 | }; | |
176 | MODULE_DEVICE_TABLE(acpi, topstar_device_ids); | |
177 | ||
178 | static 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 | ||
189 | static 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 | ||
202 | static void __exit topstar_laptop_exit(void) | |
203 | { | |
204 | acpi_bus_unregister_driver(&acpi_topstar_driver); | |
205 | } | |
206 | ||
207 | module_init(topstar_laptop_init); | |
208 | module_exit(topstar_laptop_exit); | |
209 | ||
210 | MODULE_AUTHOR("Herton Ronaldo Krzesinski"); | |
211 | MODULE_DESCRIPTION("Topstar Laptop ACPI Extras driver"); | |
212 | MODULE_LICENSE("GPL"); |