1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 *  atakbd.c
4 *
5 *  Copyright (c) 2005 Michael Schmitz
6 *
7 * Based on amikbd.c, which is
8 *
9 *  Copyright (c) 2000-2001 Vojtech Pavlik
10 *
11 *  Based on the work of:
12 *	Hamish Macdonald
13 */
14
15/*
16 * Atari keyboard driver for Linux/m68k
17 *
18 * The low level init and interrupt stuff is handled in arch/mm68k/atari/atakeyb.c
19 * (the keyboard ACIA also handles the mouse and joystick data, and the keyboard
20 * interrupt is shared with the MIDI ACIA so MIDI data also get handled there).
21 * This driver only deals with handing key events off to the input layer.
22 */
23
24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/input.h>
27#include <linux/delay.h>
28#include <linux/interrupt.h>
29
30#include <asm/atariints.h>
31#include <asm/atarihw.h>
32#include <asm/atarikb.h>
33#include <asm/irq.h>
34
35MODULE_AUTHOR("Michael Schmitz <schmitz@biophys.uni-duesseldorf.de>");
36MODULE_DESCRIPTION("Atari keyboard driver");
37MODULE_LICENSE("GPL");
38
39/*
40 0x47: KP_7     71
41 0x48: KP_8     72
42 0x49: KP_9     73
43 0x62: KP_/     98
44 0x4b: KP_4     75
45 0x4c: KP_5     76
46 0x4d: KP_6     77
47 0x37: KP_*     55
48 0x4f: KP_1     79
49 0x50: KP_2     80
50 0x51: KP_3     81
51 0x4a: KP_-     74
52 0x52: KP_0     82
53 0x53: KP_.     83
54 0x4e: KP_+     78
55
56 0x67: Up       103
57 0x6c: Down     108
58 0x69: Left     105
59 0x6a: Right    106
60 */
61
62
63static unsigned char atakbd_keycode[0x73] = {	/* American layout */
64	[1]	 = KEY_ESC,
65	[2]	 = KEY_1,
66	[3]	 = KEY_2,
67	[4]	 = KEY_3,
68	[5]	 = KEY_4,
69	[6]	 = KEY_5,
70	[7]	 = KEY_6,
71	[8]	 = KEY_7,
72	[9]	 = KEY_8,
73	[10]	 = KEY_9,
74	[11]	 = KEY_0,
75	[12]	 = KEY_MINUS,
76	[13]	 = KEY_EQUAL,
77	[14]	 = KEY_BACKSPACE,
78	[15]	 = KEY_TAB,
79	[16]	 = KEY_Q,
80	[17]	 = KEY_W,
81	[18]	 = KEY_E,
82	[19]	 = KEY_R,
83	[20]	 = KEY_T,
84	[21]	 = KEY_Y,
85	[22]	 = KEY_U,
86	[23]	 = KEY_I,
87	[24]	 = KEY_O,
88	[25]	 = KEY_P,
89	[26]	 = KEY_LEFTBRACE,
90	[27]	 = KEY_RIGHTBRACE,
91	[28]	 = KEY_ENTER,
92	[29]	 = KEY_LEFTCTRL,
93	[30]	 = KEY_A,
94	[31]	 = KEY_S,
95	[32]	 = KEY_D,
96	[33]	 = KEY_F,
97	[34]	 = KEY_G,
98	[35]	 = KEY_H,
99	[36]	 = KEY_J,
100	[37]	 = KEY_K,
101	[38]	 = KEY_L,
102	[39]	 = KEY_SEMICOLON,
103	[40]	 = KEY_APOSTROPHE,
104	[41]	 = KEY_GRAVE,
105	[42]	 = KEY_LEFTSHIFT,
106	[43]	 = KEY_BACKSLASH,
107	[44]	 = KEY_Z,
108	[45]	 = KEY_X,
109	[46]	 = KEY_C,
110	[47]	 = KEY_V,
111	[48]	 = KEY_B,
112	[49]	 = KEY_N,
113	[50]	 = KEY_M,
114	[51]	 = KEY_COMMA,
115	[52]	 = KEY_DOT,
116	[53]	 = KEY_SLASH,
117	[54]	 = KEY_RIGHTSHIFT,
118	[55]	 = KEY_KPASTERISK,
119	[56]	 = KEY_LEFTALT,
120	[57]	 = KEY_SPACE,
121	[58]	 = KEY_CAPSLOCK,
122	[59]	 = KEY_F1,
123	[60]	 = KEY_F2,
124	[61]	 = KEY_F3,
125	[62]	 = KEY_F4,
126	[63]	 = KEY_F5,
127	[64]	 = KEY_F6,
128	[65]	 = KEY_F7,
129	[66]	 = KEY_F8,
130	[67]	 = KEY_F9,
131	[68]	 = KEY_F10,
132	[71]	 = KEY_HOME,
133	[72]	 = KEY_UP,
134	[74]	 = KEY_KPMINUS,
135	[75]	 = KEY_LEFT,
136	[77]	 = KEY_RIGHT,
137	[78]	 = KEY_KPPLUS,
138	[80]	 = KEY_DOWN,
139	[82]	 = KEY_INSERT,
140	[83]	 = KEY_DELETE,
141	[96]	 = KEY_102ND,
142	[97]	 = KEY_UNDO,
143	[98]	 = KEY_HELP,
144	[99]	 = KEY_KPLEFTPAREN,
145	[100]	 = KEY_KPRIGHTPAREN,
146	[101]	 = KEY_KPSLASH,
147	[102]	 = KEY_KPASTERISK,
148	[103]	 = KEY_KP7,
149	[104]	 = KEY_KP8,
150	[105]	 = KEY_KP9,
151	[106]	 = KEY_KP4,
152	[107]	 = KEY_KP5,
153	[108]	 = KEY_KP6,
154	[109]	 = KEY_KP1,
155	[110]	 = KEY_KP2,
156	[111]	 = KEY_KP3,
157	[112]	 = KEY_KP0,
158	[113]	 = KEY_KPDOT,
159	[114]	 = KEY_KPENTER,
160};
161
162static struct input_dev *atakbd_dev;
163
164static void atakbd_interrupt(unsigned char scancode, char down)
165{
166
167	if (scancode < 0x73) {		/* scancodes < 0xf3 are keys */
168
169		// report raw events here?
170
171		scancode = atakbd_keycode[scancode];
172
173		input_report_key(atakbd_dev, scancode, down);
174		input_sync(atakbd_dev);
175	} else				/* scancodes >= 0xf3 are mouse data, most likely */
176		printk(KERN_INFO "atakbd: unhandled scancode %x\n", scancode);
177
178	return;
179}
180
181static int __init atakbd_init(void)
182{
183	int i, error;
184
185	if (!MACH_IS_ATARI || !ATARIHW_PRESENT(ST_MFP))
186		return -ENODEV;
187
188	// need to init core driver if not already done so
189	error = atari_keyb_init();
190	if (error)
191		return error;
192
193	atakbd_dev = input_allocate_device();
194	if (!atakbd_dev)
195		return -ENOMEM;
196
197	atakbd_dev->name = "Atari Keyboard";
198	atakbd_dev->phys = "atakbd/input0";
199	atakbd_dev->id.bustype = BUS_HOST;
200	atakbd_dev->id.vendor = 0x0001;
201	atakbd_dev->id.product = 0x0001;
202	atakbd_dev->id.version = 0x0100;
203
204	atakbd_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
205	atakbd_dev->keycode = atakbd_keycode;
206	atakbd_dev->keycodesize = sizeof(unsigned char);
207	atakbd_dev->keycodemax = ARRAY_SIZE(atakbd_keycode);
208
209	for (i = 1; i < 0x72; i++) {
210		set_bit(atakbd_keycode[i], atakbd_dev->keybit);
211	}
212
213	/* error check */
214	error = input_register_device(atakbd_dev);
215	if (error) {
216		input_free_device(atakbd_dev);
217		return error;
218	}
219
220	atari_input_keyboard_interrupt_hook = atakbd_interrupt;
221
222	return 0;
223}
224
225static void __exit atakbd_exit(void)
226{
227	atari_input_keyboard_interrupt_hook = NULL;
228	input_unregister_device(atakbd_dev);
229}
230
231module_init(atakbd_init);
232module_exit(atakbd_exit);
233