1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Stowaway keyboard driver for Linux |
4 | */ |
5 | |
6 | /* |
7 | * Copyright (c) 2006 Marek Vasut |
8 | * |
9 | * Based on Newton keyboard driver for Linux |
10 | * by Justin Cormack |
11 | */ |
12 | |
13 | #include <linux/slab.h> |
14 | #include <linux/module.h> |
15 | #include <linux/input.h> |
16 | #include <linux/serio.h> |
17 | |
18 | #define DRIVER_DESC "Stowaway keyboard driver" |
19 | |
20 | MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>" ); |
21 | MODULE_DESCRIPTION(DRIVER_DESC); |
22 | MODULE_LICENSE("GPL" ); |
23 | |
24 | #define SKBD_KEY_MASK 0x7f |
25 | #define SKBD_RELEASE 0x80 |
26 | |
27 | static unsigned char skbd_keycode[128] = { |
28 | KEY_1, KEY_2, KEY_3, KEY_Z, KEY_4, KEY_5, KEY_6, KEY_7, |
29 | 0, KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_GRAVE, |
30 | KEY_X, KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_SPACE, |
31 | KEY_CAPSLOCK, KEY_TAB, KEY_LEFTCTRL, 0, 0, 0, 0, 0, |
32 | 0, 0, 0, KEY_LEFTALT, 0, 0, 0, 0, |
33 | 0, 0, 0, 0, KEY_C, KEY_V, KEY_B, KEY_N, |
34 | KEY_MINUS, KEY_EQUAL, KEY_BACKSPACE, KEY_HOME, KEY_8, KEY_9, KEY_0, KEY_ESC, |
35 | KEY_LEFTBRACE, KEY_RIGHTBRACE, KEY_BACKSLASH, KEY_END, KEY_U, KEY_I, KEY_O, KEY_P, |
36 | KEY_APOSTROPHE, KEY_ENTER, KEY_PAGEUP,0, KEY_J, KEY_K, KEY_L, KEY_SEMICOLON, |
37 | KEY_SLASH, KEY_UP, KEY_PAGEDOWN, 0,KEY_M, KEY_COMMA, KEY_DOT, KEY_INSERT, |
38 | KEY_DELETE, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0, |
39 | KEY_LEFTSHIFT, KEY_RIGHTSHIFT, 0, 0, 0, 0, 0, |
40 | 0, 0, 0, 0, 0, 0, 0, 0, |
41 | 0, 0, 0, 0, 0, 0, 0, 0, |
42 | 0, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7, |
43 | KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_F12, 0, 0, 0 |
44 | }; |
45 | |
46 | struct skbd { |
47 | unsigned char keycode[128]; |
48 | struct input_dev *dev; |
49 | struct serio *serio; |
50 | char phys[32]; |
51 | }; |
52 | |
53 | static irqreturn_t skbd_interrupt(struct serio *serio, unsigned char data, |
54 | unsigned int flags) |
55 | { |
56 | struct skbd *skbd = serio_get_drvdata(serio); |
57 | struct input_dev *dev = skbd->dev; |
58 | |
59 | if (skbd->keycode[data & SKBD_KEY_MASK]) { |
60 | input_report_key(dev, code: skbd->keycode[data & SKBD_KEY_MASK], |
61 | value: !(data & SKBD_RELEASE)); |
62 | input_sync(dev); |
63 | } |
64 | |
65 | return IRQ_HANDLED; |
66 | } |
67 | |
68 | static int skbd_connect(struct serio *serio, struct serio_driver *drv) |
69 | { |
70 | struct skbd *skbd; |
71 | struct input_dev *input_dev; |
72 | int err = -ENOMEM; |
73 | int i; |
74 | |
75 | skbd = kzalloc(size: sizeof(struct skbd), GFP_KERNEL); |
76 | input_dev = input_allocate_device(); |
77 | if (!skbd || !input_dev) |
78 | goto fail1; |
79 | |
80 | skbd->serio = serio; |
81 | skbd->dev = input_dev; |
82 | snprintf(buf: skbd->phys, size: sizeof(skbd->phys), fmt: "%s/input0" , serio->phys); |
83 | memcpy(skbd->keycode, skbd_keycode, sizeof(skbd->keycode)); |
84 | |
85 | input_dev->name = "Stowaway Keyboard" ; |
86 | input_dev->phys = skbd->phys; |
87 | input_dev->id.bustype = BUS_RS232; |
88 | input_dev->id.vendor = SERIO_STOWAWAY; |
89 | input_dev->id.product = 0x0001; |
90 | input_dev->id.version = 0x0100; |
91 | input_dev->dev.parent = &serio->dev; |
92 | |
93 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); |
94 | input_dev->keycode = skbd->keycode; |
95 | input_dev->keycodesize = sizeof(unsigned char); |
96 | input_dev->keycodemax = ARRAY_SIZE(skbd_keycode); |
97 | for (i = 0; i < ARRAY_SIZE(skbd_keycode); i++) |
98 | set_bit(nr: skbd_keycode[i], addr: input_dev->keybit); |
99 | clear_bit(nr: 0, addr: input_dev->keybit); |
100 | |
101 | serio_set_drvdata(serio, data: skbd); |
102 | |
103 | err = serio_open(serio, drv); |
104 | if (err) |
105 | goto fail2; |
106 | |
107 | err = input_register_device(skbd->dev); |
108 | if (err) |
109 | goto fail3; |
110 | |
111 | return 0; |
112 | |
113 | fail3: serio_close(serio); |
114 | fail2: serio_set_drvdata(serio, NULL); |
115 | fail1: input_free_device(dev: input_dev); |
116 | kfree(objp: skbd); |
117 | return err; |
118 | } |
119 | |
120 | static void skbd_disconnect(struct serio *serio) |
121 | { |
122 | struct skbd *skbd = serio_get_drvdata(serio); |
123 | |
124 | serio_close(serio); |
125 | serio_set_drvdata(serio, NULL); |
126 | input_unregister_device(skbd->dev); |
127 | kfree(objp: skbd); |
128 | } |
129 | |
130 | static const struct serio_device_id skbd_serio_ids[] = { |
131 | { |
132 | .type = SERIO_RS232, |
133 | .proto = SERIO_STOWAWAY, |
134 | .id = SERIO_ANY, |
135 | .extra = SERIO_ANY, |
136 | }, |
137 | { 0 } |
138 | }; |
139 | |
140 | MODULE_DEVICE_TABLE(serio, skbd_serio_ids); |
141 | |
142 | static struct serio_driver skbd_drv = { |
143 | .driver = { |
144 | .name = "stowaway" , |
145 | }, |
146 | .description = DRIVER_DESC, |
147 | .id_table = skbd_serio_ids, |
148 | .interrupt = skbd_interrupt, |
149 | .connect = skbd_connect, |
150 | .disconnect = skbd_disconnect, |
151 | }; |
152 | |
153 | module_serio_driver(skbd_drv); |
154 | |