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31ea7ff0 JK |
1 | /* |
2 | * atlas_btns.c - Atlas Wallmount Touchscreen ACPI Extras | |
3 | * | |
4 | * Copyright (C) 2006 Jaya Kumar | |
5 | * Based on Toshiba ACPI by John Belmonte and ASUS ACPI | |
6 | * This work was sponsored by CIS(M) Sdn Bhd. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | * | |
22 | */ | |
23 | ||
bf77499f DT |
24 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
25 | ||
31ea7ff0 JK |
26 | #include <linux/kernel.h> |
27 | #include <linux/module.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/input.h> | |
30 | #include <linux/types.h> | |
31 | #include <asm/uaccess.h> | |
32 | #include <acpi/acpi_drivers.h> | |
33 | ||
72341eea DT |
34 | #define ACPI_ATLAS_NAME "Atlas ACPI" |
35 | #define ACPI_ATLAS_CLASS "Atlas" | |
31ea7ff0 | 36 | |
72341eea | 37 | static unsigned short atlas_keymap[16]; |
31ea7ff0 JK |
38 | static struct input_dev *input_dev; |
39 | ||
40 | /* button handling code */ | |
41 | static acpi_status acpi_atlas_button_setup(acpi_handle region_handle, | |
42 | u32 function, void *handler_context, void **return_context) | |
43 | { | |
44 | *return_context = | |
45 | (function != ACPI_REGION_DEACTIVATE) ? handler_context : NULL; | |
46 | ||
47 | return AE_OK; | |
48 | } | |
49 | ||
50 | static acpi_status acpi_atlas_button_handler(u32 function, | |
51 | acpi_physical_address address, | |
439913ff | 52 | u32 bit_width, u64 *value, |
31ea7ff0 JK |
53 | void *handler_context, void *region_context) |
54 | { | |
55 | acpi_status status; | |
31ea7ff0 JK |
56 | |
57 | if (function == ACPI_WRITE) { | |
72341eea DT |
58 | int code = address & 0x0f; |
59 | int key_down = !(address & 0x10); | |
60 | ||
61 | input_event(input_dev, EV_MSC, MSC_SCAN, code); | |
62 | input_report_key(input_dev, atlas_keymap[code], key_down); | |
31ea7ff0 | 63 | input_sync(input_dev); |
72341eea | 64 | |
02b5fac1 | 65 | status = AE_OK; |
31ea7ff0 | 66 | } else { |
bf77499f | 67 | pr_warn("shrugged on unexpected function: function=%x,address=%lx,value=%x\n", |
31ea7ff0 | 68 | function, (unsigned long)address, (u32)*value); |
02b5fac1 | 69 | status = AE_BAD_PARAMETER; |
31ea7ff0 JK |
70 | } |
71 | ||
72 | return status; | |
73 | } | |
74 | ||
75 | static int atlas_acpi_button_add(struct acpi_device *device) | |
76 | { | |
77 | acpi_status status; | |
72341eea | 78 | int i; |
31ea7ff0 JK |
79 | int err; |
80 | ||
81 | input_dev = input_allocate_device(); | |
82 | if (!input_dev) { | |
bf77499f | 83 | pr_err("unable to allocate input device\n"); |
31ea7ff0 JK |
84 | return -ENOMEM; |
85 | } | |
86 | ||
87 | input_dev->name = "Atlas ACPI button driver"; | |
88 | input_dev->phys = "ASIM0000/atlas/input0"; | |
89 | input_dev->id.bustype = BUS_HOST; | |
72341eea DT |
90 | input_dev->keycode = atlas_keymap; |
91 | input_dev->keycodesize = sizeof(unsigned short); | |
92 | input_dev->keycodemax = ARRAY_SIZE(atlas_keymap); | |
93 | ||
94 | input_set_capability(input_dev, EV_MSC, MSC_SCAN); | |
95 | __set_bit(EV_KEY, input_dev->evbit); | |
96 | for (i = 0; i < ARRAY_SIZE(atlas_keymap); i++) { | |
97 | if (i < 9) { | |
98 | atlas_keymap[i] = KEY_F1 + i; | |
99 | __set_bit(KEY_F1 + i, input_dev->keybit); | |
100 | } else | |
101 | atlas_keymap[i] = KEY_RESERVED; | |
102 | } | |
31ea7ff0 JK |
103 | |
104 | err = input_register_device(input_dev); | |
105 | if (err) { | |
bf77499f | 106 | pr_err("couldn't register input device\n"); |
31ea7ff0 JK |
107 | input_free_device(input_dev); |
108 | return err; | |
109 | } | |
110 | ||
111 | /* hookup button handler */ | |
112 | status = acpi_install_address_space_handler(device->handle, | |
113 | 0x81, &acpi_atlas_button_handler, | |
114 | &acpi_atlas_button_setup, device); | |
115 | if (ACPI_FAILURE(status)) { | |
bf77499f | 116 | pr_err("error installing addr spc handler\n"); |
31ea7ff0 | 117 | input_unregister_device(input_dev); |
02b5fac1 | 118 | err = -EINVAL; |
31ea7ff0 JK |
119 | } |
120 | ||
02b5fac1 | 121 | return err; |
31ea7ff0 JK |
122 | } |
123 | ||
51fac838 | 124 | static int atlas_acpi_button_remove(struct acpi_device *device) |
31ea7ff0 JK |
125 | { |
126 | acpi_status status; | |
127 | ||
128 | status = acpi_remove_address_space_handler(device->handle, | |
129 | 0x81, &acpi_atlas_button_handler); | |
02b5fac1 | 130 | if (ACPI_FAILURE(status)) |
bf77499f | 131 | pr_err("error removing addr spc handler\n"); |
31ea7ff0 JK |
132 | |
133 | input_unregister_device(input_dev); | |
134 | ||
02b5fac1 | 135 | return 0; |
31ea7ff0 JK |
136 | } |
137 | ||
1ba90e3a TR |
138 | static const struct acpi_device_id atlas_device_ids[] = { |
139 | {"ASIM0000", 0}, | |
140 | {"", 0}, | |
141 | }; | |
142 | MODULE_DEVICE_TABLE(acpi, atlas_device_ids); | |
143 | ||
31ea7ff0 JK |
144 | static struct acpi_driver atlas_acpi_driver = { |
145 | .name = ACPI_ATLAS_NAME, | |
146 | .class = ACPI_ATLAS_CLASS, | |
07d19ffc | 147 | .owner = THIS_MODULE, |
1ba90e3a | 148 | .ids = atlas_device_ids, |
31ea7ff0 JK |
149 | .ops = { |
150 | .add = atlas_acpi_button_add, | |
151 | .remove = atlas_acpi_button_remove, | |
152 | }, | |
153 | }; | |
f06efccf | 154 | module_acpi_driver(atlas_acpi_driver); |
31ea7ff0 JK |
155 | |
156 | MODULE_AUTHOR("Jaya Kumar"); | |
157 | MODULE_LICENSE("GPL"); | |
158 | MODULE_DESCRIPTION("Atlas button driver"); | |
159 |