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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * atlas_btns.c - Atlas Wallmount Touchscreen ACPI Extras
4 *
5 * Copyright (C) 2006 Jaya Kumar
6 * Based on Toshiba ACPI by John Belmonte and ASUS ACPI
7 * This work was sponsored by CIS(M) Sdn Bhd.
8 */
9
10#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11
12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/input.h>
15#include <linux/types.h>
16#include <linux/acpi.h>
17#include <linux/uaccess.h>
18
19#define ACPI_ATLAS_NAME "Atlas ACPI"
20#define ACPI_ATLAS_CLASS "Atlas"
21
22static unsigned short atlas_keymap[16];
23static struct input_dev *input_dev;
24
25/* button handling code */
26static acpi_status acpi_atlas_button_setup(acpi_handle region_handle,
27 u32 function, void *handler_context, void **return_context)
28{
29 *return_context =
30 (function != ACPI_REGION_DEACTIVATE) ? handler_context : NULL;
31
32 return AE_OK;
33}
34
35static acpi_status acpi_atlas_button_handler(u32 function,
36 acpi_physical_address address,
37 u32 bit_width, u64 *value,
38 void *handler_context, void *region_context)
39{
40 acpi_status status;
41
42 if (function == ACPI_WRITE) {
43 int code = address & 0x0f;
44 int key_down = !(address & 0x10);
45
46 input_event(input_dev, EV_MSC, MSC_SCAN, code);
47 input_report_key(input_dev, atlas_keymap[code], key_down);
48 input_sync(input_dev);
49
50 status = AE_OK;
51 } else {
52 pr_warn("shrugged on unexpected function: function=%x,address=%lx,value=%x\n",
53 function, (unsigned long)address, (u32)*value);
54 status = AE_BAD_PARAMETER;
55 }
56
57 return status;
58}
59
60static int atlas_acpi_button_add(struct acpi_device *device)
61{
62 acpi_status status;
63 int i;
64 int err;
65
66 input_dev = input_allocate_device();
67 if (!input_dev) {
68 pr_err("unable to allocate input device\n");
69 return -ENOMEM;
70 }
71
72 input_dev->name = "Atlas ACPI button driver";
73 input_dev->phys = "ASIM0000/atlas/input0";
74 input_dev->id.bustype = BUS_HOST;
75 input_dev->keycode = atlas_keymap;
76 input_dev->keycodesize = sizeof(unsigned short);
77 input_dev->keycodemax = ARRAY_SIZE(atlas_keymap);
78
79 input_set_capability(input_dev, EV_MSC, MSC_SCAN);
80 __set_bit(EV_KEY, input_dev->evbit);
81 for (i = 0; i < ARRAY_SIZE(atlas_keymap); i++) {
82 if (i < 9) {
83 atlas_keymap[i] = KEY_F1 + i;
84 __set_bit(KEY_F1 + i, input_dev->keybit);
85 } else
86 atlas_keymap[i] = KEY_RESERVED;
87 }
88
89 err = input_register_device(input_dev);
90 if (err) {
91 pr_err("couldn't register input device\n");
92 input_free_device(input_dev);
93 return err;
94 }
95
96 /* hookup button handler */
97 status = acpi_install_address_space_handler(device->handle,
98 0x81, &acpi_atlas_button_handler,
99 &acpi_atlas_button_setup, device);
100 if (ACPI_FAILURE(status)) {
101 pr_err("error installing addr spc handler\n");
102 input_unregister_device(input_dev);
103 err = -EINVAL;
104 }
105
106 return err;
107}
108
109static void atlas_acpi_button_remove(struct acpi_device *device)
110{
111 acpi_status status;
112
113 status = acpi_remove_address_space_handler(device->handle,
114 0x81, &acpi_atlas_button_handler);
115 if (ACPI_FAILURE(status))
116 pr_err("error removing addr spc handler\n");
117
118 input_unregister_device(input_dev);
119}
120
121static const struct acpi_device_id atlas_device_ids[] = {
122 {"ASIM0000", 0},
123 {"", 0},
124};
125MODULE_DEVICE_TABLE(acpi, atlas_device_ids);
126
127static struct acpi_driver atlas_acpi_driver = {
128 .name = ACPI_ATLAS_NAME,
129 .class = ACPI_ATLAS_CLASS,
130 .owner = THIS_MODULE,
131 .ids = atlas_device_ids,
132 .ops = {
133 .add = atlas_acpi_button_add,
134 .remove = atlas_acpi_button_remove,
135 },
136};
137module_acpi_driver(atlas_acpi_driver);
138
139MODULE_AUTHOR("Jaya Kumar");
140MODULE_LICENSE("GPL");
141MODULE_DESCRIPTION("Atlas button driver");
142
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
24#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25
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
34#define ACPI_ATLAS_NAME "Atlas ACPI"
35#define ACPI_ATLAS_CLASS "Atlas"
36
37static unsigned short atlas_keymap[16];
38static struct input_dev *input_dev;
39
40/* button handling code */
41static 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
50static acpi_status acpi_atlas_button_handler(u32 function,
51 acpi_physical_address address,
52 u32 bit_width, u64 *value,
53 void *handler_context, void *region_context)
54{
55 acpi_status status;
56
57 if (function == ACPI_WRITE) {
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);
63 input_sync(input_dev);
64
65 status = AE_OK;
66 } else {
67 pr_warn("shrugged on unexpected function: function=%x,address=%lx,value=%x\n",
68 function, (unsigned long)address, (u32)*value);
69 status = AE_BAD_PARAMETER;
70 }
71
72 return status;
73}
74
75static int atlas_acpi_button_add(struct acpi_device *device)
76{
77 acpi_status status;
78 int i;
79 int err;
80
81 input_dev = input_allocate_device();
82 if (!input_dev) {
83 pr_err("unable to allocate input device\n");
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;
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 }
103
104 err = input_register_device(input_dev);
105 if (err) {
106 pr_err("couldn't register input device\n");
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)) {
116 pr_err("error installing addr spc handler\n");
117 input_unregister_device(input_dev);
118 err = -EINVAL;
119 }
120
121 return err;
122}
123
124static int atlas_acpi_button_remove(struct acpi_device *device, int type)
125{
126 acpi_status status;
127
128 status = acpi_remove_address_space_handler(device->handle,
129 0x81, &acpi_atlas_button_handler);
130 if (ACPI_FAILURE(status))
131 pr_err("error removing addr spc handler\n");
132
133 input_unregister_device(input_dev);
134
135 return 0;
136}
137
138static const struct acpi_device_id atlas_device_ids[] = {
139 {"ASIM0000", 0},
140 {"", 0},
141};
142MODULE_DEVICE_TABLE(acpi, atlas_device_ids);
143
144static struct acpi_driver atlas_acpi_driver = {
145 .name = ACPI_ATLAS_NAME,
146 .class = ACPI_ATLAS_CLASS,
147 .owner = THIS_MODULE,
148 .ids = atlas_device_ids,
149 .ops = {
150 .add = atlas_acpi_button_add,
151 .remove = atlas_acpi_button_remove,
152 },
153};
154
155static int __init atlas_acpi_init(void)
156{
157 if (acpi_disabled)
158 return -ENODEV;
159
160 return acpi_bus_register_driver(&atlas_acpi_driver);
161}
162
163static void __exit atlas_acpi_exit(void)
164{
165 acpi_bus_unregister_driver(&atlas_acpi_driver);
166}
167
168module_init(atlas_acpi_init);
169module_exit(atlas_acpi_exit);
170
171MODULE_AUTHOR("Jaya Kumar");
172MODULE_LICENSE("GPL");
173MODULE_DESCRIPTION("Atlas button driver");
174