2 * ACPI driver for Topstar notebooks (hotkeys support only)
4 * Copyright (c) 2009 Herton Ronaldo Krzesinski <herton@mandriva.com.br>
6 * Implementation inspired by existing x86 platform drivers, in special
7 * asus/eepc/fujitsu-laptop, thanks to their authors
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.
14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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>
24 #define ACPI_TOPSTAR_CLASS "topstar"
27 struct input_dev *inputdev;
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 } },
43 /* Known non hotkey events don't handled or that we don't care yet */
44 { KE_IGNORE, 0x82, }, /* backlight event */
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?)
54 { KE_KEY, 0x96, { KEY_F14 } },
55 { KE_KEY, 0x97, { KEY_F14 } },
60 static void acpi_topstar_notify(struct acpi_device *device, u32 event)
62 static bool dup_evnt[2];
64 struct topstar_hkey *hkey = acpi_driver_data(device);
66 /* 0x83 and 0x84 key events comes duplicated... */
67 if (event == 0x83 || event == 0x84) {
68 dup = &dup_evnt[event - 0x83];
76 if (!sparse_keymap_report_event(hkey->inputdev, event, 1, true))
77 pr_info("unknown event = 0x%02x\n", event);
80 static int acpi_topstar_fncx_switch(struct acpi_device *device, bool state)
84 status = acpi_execute_simple_method(device->handle, "FNCX",
86 if (ACPI_FAILURE(status)) {
87 pr_err("Unable to switch FNCX notifications\n");
94 static int acpi_topstar_init_hkey(struct topstar_hkey *hkey)
96 struct input_dev *input;
99 input = input_allocate_device();
103 input->name = "Topstar Laptop extra buttons";
104 input->phys = "topstar/input0";
105 input->id.bustype = BUS_HOST;
107 error = sparse_keymap_setup(input, topstar_keymap, NULL);
109 pr_err("Unable to setup input device keymap\n");
113 error = input_register_device(input);
115 pr_err("Unable to register input device\n");
116 goto err_free_keymap;
119 hkey->inputdev = input;
123 sparse_keymap_free(input);
125 input_free_device(input);
129 static int acpi_topstar_add(struct acpi_device *device)
131 struct topstar_hkey *tps_hkey;
133 tps_hkey = kzalloc(sizeof(struct topstar_hkey), GFP_KERNEL);
137 strcpy(acpi_device_name(device), "Topstar TPSACPI");
138 strcpy(acpi_device_class(device), ACPI_TOPSTAR_CLASS);
140 if (acpi_topstar_fncx_switch(device, true))
143 if (acpi_topstar_init_hkey(tps_hkey))
146 device->driver_data = tps_hkey;
154 static int acpi_topstar_remove(struct acpi_device *device)
156 struct topstar_hkey *tps_hkey = acpi_driver_data(device);
158 acpi_topstar_fncx_switch(device, false);
160 sparse_keymap_free(tps_hkey->inputdev);
161 input_unregister_device(tps_hkey->inputdev);
167 static const struct acpi_device_id topstar_device_ids[] = {
171 MODULE_DEVICE_TABLE(acpi, topstar_device_ids);
173 static struct acpi_driver acpi_topstar_driver = {
174 .name = "Topstar laptop ACPI driver",
175 .class = ACPI_TOPSTAR_CLASS,
176 .ids = topstar_device_ids,
178 .add = acpi_topstar_add,
179 .remove = acpi_topstar_remove,
180 .notify = acpi_topstar_notify,
183 module_acpi_driver(acpi_topstar_driver);
185 MODULE_AUTHOR("Herton Ronaldo Krzesinski");
186 MODULE_DESCRIPTION("Topstar Laptop ACPI Extras driver");
187 MODULE_LICENSE("GPL");