1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * SEGA Dreamcast keyboard driver
4 * Based on drivers/usb/usbkbd.c
5 * Copyright (c) YAEGASHI Takeshi, 2001
6 * Porting to 2.6 Copyright (c) Adrian McMenamin, 2007 - 2009
9 #include <linux/kernel.h>
10 #include <linux/slab.h>
11 #include <linux/input.h>
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/timer.h>
15 #include <linux/maple.h>
17 /* Very simple mutex to ensure proper cleanup */
18 static DEFINE_MUTEX(maple_keyb_mutex);
20 #define NR_SCANCODES 256
22 MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk");
23 MODULE_DESCRIPTION("SEGA Dreamcast keyboard driver");
24 MODULE_LICENSE("GPL");
27 struct input_dev *dev;
28 unsigned short keycode[NR_SCANCODES];
33 static const unsigned short dc_kbd_keycode[NR_SCANCODES] = {
34 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_A, KEY_B,
35 KEY_C, KEY_D, KEY_E, KEY_F, KEY_G, KEY_H, KEY_I, KEY_J, KEY_K, KEY_L,
36 KEY_M, KEY_N, KEY_O, KEY_P, KEY_Q, KEY_R, KEY_S, KEY_T, KEY_U, KEY_V,
37 KEY_W, KEY_X, KEY_Y, KEY_Z, KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6,
38 KEY_7, KEY_8, KEY_9, KEY_0, KEY_ENTER, KEY_ESC, KEY_BACKSPACE,
39 KEY_TAB, KEY_SPACE, KEY_MINUS, KEY_EQUAL, KEY_LEFTBRACE,
40 KEY_RIGHTBRACE, KEY_BACKSLASH, KEY_BACKSLASH, KEY_SEMICOLON,
41 KEY_APOSTROPHE, KEY_GRAVE, KEY_COMMA, KEY_DOT, KEY_SLASH,
42 KEY_CAPSLOCK, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6,
43 KEY_F7, KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_F12, KEY_SYSRQ,
44 KEY_SCROLLLOCK, KEY_PAUSE, KEY_INSERT, KEY_HOME, KEY_PAGEUP,
45 KEY_DELETE, KEY_END, KEY_PAGEDOWN, KEY_RIGHT, KEY_LEFT, KEY_DOWN,
46 KEY_UP, KEY_NUMLOCK, KEY_KPSLASH, KEY_KPASTERISK, KEY_KPMINUS,
47 KEY_KPPLUS, KEY_KPENTER, KEY_KP1, KEY_KP2, KEY_KP3, KEY_KP4, KEY_KP5,
48 KEY_KP6, KEY_KP7, KEY_KP8, KEY_KP9, KEY_KP0, KEY_KPDOT, KEY_102ND,
49 KEY_COMPOSE, KEY_POWER, KEY_KPEQUAL, KEY_F13, KEY_F14, KEY_F15,
50 KEY_F16, KEY_F17, KEY_F18, KEY_F19, KEY_F20, KEY_F21, KEY_F22,
51 KEY_F23, KEY_F24, KEY_OPEN, KEY_HELP, KEY_PROPS, KEY_FRONT, KEY_STOP,
52 KEY_AGAIN, KEY_UNDO, KEY_CUT, KEY_COPY, KEY_PASTE, KEY_FIND, KEY_MUTE,
53 KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
54 KEY_KPCOMMA, KEY_RESERVED, KEY_RO, KEY_KATAKANAHIRAGANA , KEY_YEN,
55 KEY_HENKAN, KEY_MUHENKAN, KEY_KPJPCOMMA, KEY_RESERVED, KEY_RESERVED,
56 KEY_RESERVED, KEY_HANGEUL, KEY_HANJA, KEY_KATAKANA, KEY_HIRAGANA,
57 KEY_ZENKAKUHANKAKU, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
58 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
59 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
60 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
61 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
62 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
63 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
64 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
65 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
66 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
67 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
68 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
69 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
70 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
71 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
72 KEY_RESERVED, KEY_RESERVED, KEY_LEFTCTRL, KEY_LEFTSHIFT, KEY_LEFTALT,
73 KEY_LEFTMETA, KEY_RIGHTCTRL, KEY_RIGHTSHIFT, KEY_RIGHTALT,
74 KEY_RIGHTMETA, KEY_PLAYPAUSE, KEY_STOPCD, KEY_PREVIOUSSONG,
75 KEY_NEXTSONG, KEY_EJECTCD, KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_MUTE,
76 KEY_WWW, KEY_BACK, KEY_FORWARD, KEY_STOP, KEY_FIND, KEY_SCROLLUP,
77 KEY_SCROLLDOWN, KEY_EDIT, KEY_SLEEP, KEY_SCREENLOCK, KEY_REFRESH,
78 KEY_CALC, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED
81 static void dc_scan_kbd(struct dc_kbd *kbd)
83 struct input_dev *dev = kbd->dev;
88 for (i = 0; i < 8; i++) {
90 keycode = kbd->keycode[code];
91 input_event(dev, EV_MSC, MSC_SCAN, code);
92 input_report_key(dev, keycode, (kbd->new[0] >> i) & 1);
95 for (i = 2; i < 8; i++) {
96 ptr = memchr(kbd->new + 2, kbd->old[i], 6);
98 if (code > 3 && ptr == NULL) {
99 keycode = kbd->keycode[code];
101 input_event(dev, EV_MSC, MSC_SCAN, code);
102 input_report_key(dev, keycode, 0);
105 "Unknown key (scancode %#x) released.",
108 ptr = memchr(kbd->old + 2, kbd->new[i], 6);
110 if (code > 3 && ptr) {
111 keycode = kbd->keycode[code];
113 input_event(dev, EV_MSC, MSC_SCAN, code);
114 input_report_key(dev, keycode, 1);
117 "Unknown key (scancode %#x) pressed.",
122 memcpy(kbd->old, kbd->new, 8);
125 static void dc_kbd_callback(struct mapleq *mq)
127 struct maple_device *mapledev = mq->dev;
128 struct dc_kbd *kbd = maple_get_drvdata(mapledev);
129 unsigned long *buf = (unsigned long *)(mq->recvbuf->buf);
132 * We should always get the lock because the only
133 * time it may be locked is if the driver is in the cleanup phase.
135 if (likely(mutex_trylock(&maple_keyb_mutex))) {
137 if (buf[1] == mapledev->function) {
138 memcpy(kbd->new, buf + 2, 8);
142 mutex_unlock(&maple_keyb_mutex);
146 static int probe_maple_kbd(struct device *dev)
148 struct maple_device *mdev;
149 struct maple_driver *mdrv;
152 struct input_dev *idev;
154 mdev = to_maple_dev(dev);
155 mdrv = to_maple_driver(dev->driver);
157 kbd = kzalloc(sizeof(struct dc_kbd), GFP_KERNEL);
163 idev = input_allocate_device();
166 goto fail_idev_alloc;
170 memcpy(kbd->keycode, dc_kbd_keycode, sizeof(kbd->keycode));
172 idev->name = mdev->product_name;
173 idev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
174 idev->keycode = kbd->keycode;
175 idev->keycodesize = sizeof(unsigned short);
176 idev->keycodemax = ARRAY_SIZE(kbd->keycode);
177 idev->id.bustype = BUS_HOST;
178 idev->dev.parent = &mdev->dev;
180 for (i = 0; i < NR_SCANCODES; i++)
181 __set_bit(dc_kbd_keycode[i], idev->keybit);
182 __clear_bit(KEY_RESERVED, idev->keybit);
184 input_set_capability(idev, EV_MSC, MSC_SCAN);
186 error = input_register_device(idev);
190 /* Maple polling is locked to VBLANK - which may be just 50/s */
191 maple_getcond_callback(mdev, dc_kbd_callback, HZ/50,
192 MAPLE_FUNC_KEYBOARD);
196 maple_set_drvdata(mdev, kbd);
201 maple_set_drvdata(mdev, NULL);
202 input_free_device(idev);
209 static int remove_maple_kbd(struct device *dev)
211 struct maple_device *mdev = to_maple_dev(dev);
212 struct dc_kbd *kbd = maple_get_drvdata(mdev);
214 mutex_lock(&maple_keyb_mutex);
216 input_unregister_device(kbd->dev);
219 maple_set_drvdata(mdev, NULL);
221 mutex_unlock(&maple_keyb_mutex);
225 static struct maple_driver dc_kbd_driver = {
226 .function = MAPLE_FUNC_KEYBOARD,
228 .name = "Dreamcast_keyboard",
229 .probe = probe_maple_kbd,
230 .remove = remove_maple_kbd,
234 static int __init dc_kbd_init(void)
236 return maple_driver_register(&dc_kbd_driver);
239 static void __exit dc_kbd_exit(void)
241 maple_driver_unregister(&dc_kbd_driver);
244 module_init(dc_kbd_init);
245 module_exit(dc_kbd_exit);