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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 | 43 | /* Known non hotkey events don't handled or that we don't care yet */ |
bd038080 | 44 | { KE_IGNORE, 0x82, }, /* backlight event */ |
97490f1c DT |
45 | { KE_IGNORE, 0x8e, }, |
46 | { KE_IGNORE, 0x8f, }, | |
47 | { KE_IGNORE, 0x90, }, | |
9caeb532 | 48 | |
97490f1c DT |
49 | /* |
50 | * 'G key' generate two event codes, convert to only | |
51 | * one event/key code for now, consider replacing by | |
52 | * a switch (3G switch - SW_3G?) | |
53 | */ | |
54 | { KE_KEY, 0x96, { KEY_F14 } }, | |
55 | { KE_KEY, 0x97, { KEY_F14 } }, | |
9caeb532 | 56 | |
97490f1c DT |
57 | { KE_END, 0 } |
58 | }; | |
9caeb532 HRK |
59 | |
60 | static void acpi_topstar_notify(struct acpi_device *device, u32 event) | |
61 | { | |
9caeb532 HRK |
62 | static bool dup_evnt[2]; |
63 | bool *dup; | |
64 | struct topstar_hkey *hkey = acpi_driver_data(device); | |
65 | ||
66 | /* 0x83 and 0x84 key events comes duplicated... */ | |
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 | ||
97490f1c DT |
76 | if (!sparse_keymap_report_event(hkey->inputdev, event, 1, true)) |
77 | pr_info("unknown event = 0x%02x\n", event); | |
9caeb532 HRK |
78 | } |
79 | ||
80 | static 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 | ||
9caeb532 HRK |
98 | static int acpi_topstar_init_hkey(struct topstar_hkey *hkey) |
99 | { | |
97490f1c DT |
100 | struct input_dev *input; |
101 | int error; | |
9caeb532 | 102 | |
97490f1c DT |
103 | input = input_allocate_device(); |
104 | if (!input) { | |
9caeb532 | 105 | pr_err("Unable to allocate input device\n"); |
97490f1c | 106 | return -ENOMEM; |
9caeb532 | 107 | } |
97490f1c DT |
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; | |
9caeb532 | 117 | } |
97490f1c DT |
118 | |
119 | error = input_register_device(input); | |
120 | if (error) { | |
9caeb532 | 121 | pr_err("Unable to register input device\n"); |
97490f1c | 122 | goto err_free_keymap; |
9caeb532 HRK |
123 | } |
124 | ||
97490f1c | 125 | hkey->inputdev = input; |
9caeb532 | 126 | return 0; |
97490f1c DT |
127 | |
128 | err_free_keymap: | |
129 | sparse_keymap_free(input); | |
130 | err_free_dev: | |
131 | input_free_device(input); | |
132 | return error; | |
9caeb532 HRK |
133 | } |
134 | ||
135 | static 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 | ||
155 | add_err: | |
156 | kfree(tps_hkey); | |
157 | return -ENODEV; | |
158 | } | |
159 | ||
51fac838 | 160 | static int acpi_topstar_remove(struct acpi_device *device) |
9caeb532 HRK |
161 | { |
162 | struct topstar_hkey *tps_hkey = acpi_driver_data(device); | |
163 | ||
164 | acpi_topstar_fncx_switch(device, false); | |
165 | ||
97490f1c | 166 | sparse_keymap_free(tps_hkey->inputdev); |
9caeb532 HRK |
167 | input_unregister_device(tps_hkey->inputdev); |
168 | kfree(tps_hkey); | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
173 | static const struct acpi_device_id topstar_device_ids[] = { | |
174 | { "TPSACPI01", 0 }, | |
175 | { "", 0 }, | |
176 | }; | |
177 | MODULE_DEVICE_TABLE(acpi, topstar_device_ids); | |
178 | ||
179 | static 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 | }; | |
15165594 | 189 | module_acpi_driver(acpi_topstar_driver); |
9caeb532 HRK |
190 | |
191 | MODULE_AUTHOR("Herton Ronaldo Krzesinski"); | |
192 | MODULE_DESCRIPTION("Topstar Laptop ACPI Extras driver"); | |
193 | MODULE_LICENSE("GPL"); |