1 /*
2 * SEGA Dreamcast keyboard driver
3 * Based on drivers/usb/usbkbd.c
4 * Copyright YAEGASHI Takeshi, 2001
5 * Porting to 2.6 Copyright Adrian McMenamin, 2007
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, see the file COPYING, or write
19 * to the Free Software Foundation, Inc.,
20 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include <linux/kernel.h>
24 #include <linux/slab.h>
25 #include <linux/input.h>
26 #include <linux/module.h>
27 #include <linux/init.h>
28 #include <linux/timer.h>
29 #include <linux/maple.h>
30 #include <asm/mach/maple.h>
31
32 /* Very simple mutex to ensure proper cleanup */
33 static DEFINE_MUTEX(maple_keyb_mutex);
34
35 #define NR_SCANCODES 256
36
37 MODULE_AUTHOR("YAEGASHI Takeshi, Adrian McMenamin");
38 MODULE_DESCRIPTION("SEGA Dreamcast keyboard driver");
39 MODULE_LICENSE("GPL");
40
41 struct dc_kbd {
42 struct input_dev *dev;
43 unsigned short keycode[NR_SCANCODES];
44 unsigned char new[8];
45 unsigned char old[8];
46 };
47
48 static const unsigned short dc_kbd_keycode[NR_SCANCODES] = {
49 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_A, KEY_B, KEY_C, KEY_D,
50 KEY_E, KEY_F, KEY_G, KEY_H, KEY_I, KEY_J, KEY_K, KEY_L,
51 KEY_M, KEY_N, KEY_O, KEY_P, KEY_Q, KEY_R, KEY_S, KEY_T,
52 KEY_U, KEY_V, KEY_W, KEY_X, KEY_Y, KEY_Z, KEY_1, KEY_2,
53 KEY_3, KEY_4, KEY_5, KEY_6, KEY_7, KEY_8, KEY_9, KEY_0,
54 KEY_ENTER, KEY_ESC, KEY_BACKSPACE, KEY_TAB, KEY_SPACE, KEY_MINUS, KEY_EQUAL, KEY_LEFTBRACE,
55 KEY_RIGHTBRACE, KEY_BACKSLASH, KEY_BACKSLASH, KEY_SEMICOLON, KEY_APOSTROPHE, KEY_GRAVE, KEY_COMMA,
56 KEY_DOT, KEY_SLASH, KEY_CAPSLOCK, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6,
57 KEY_F7, KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_F12, KEY_SYSRQ,
58 KEY_SCROLLLOCK, KEY_PAUSE, KEY_INSERT, KEY_HOME, KEY_PAGEUP, KEY_DELETE,
59 KEY_END, KEY_PAGEDOWN, KEY_RIGHT, KEY_LEFT, KEY_DOWN, KEY_UP,
60 KEY_NUMLOCK, KEY_KPSLASH, KEY_KPASTERISK, KEY_KPMINUS, KEY_KPPLUS, KEY_KPENTER, KEY_KP1, KEY_KP2,
61 KEY_KP3, KEY_KP4, KEY_KP5, KEY_KP6, KEY_KP7, KEY_KP8, KEY_KP9, KEY_KP0, KEY_KPDOT,
62 KEY_102ND, KEY_COMPOSE, KEY_POWER, KEY_KPEQUAL, KEY_F13, KEY_F14, KEY_F15,
63 KEY_F16, KEY_F17, KEY_F18, KEY_F19, KEY_F20,
64 KEY_F21, KEY_F22, KEY_F23, KEY_F24, KEY_OPEN, KEY_HELP, KEY_PROPS, KEY_FRONT,
65 KEY_STOP, KEY_AGAIN, KEY_UNDO, KEY_CUT, KEY_COPY, KEY_PASTE, KEY_FIND, KEY_MUTE,
66 KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_KPCOMMA, KEY_RESERVED, KEY_RO, KEY_KATAKANAHIRAGANA , KEY_YEN,
67 KEY_HENKAN, KEY_MUHENKAN, KEY_KPJPCOMMA, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
68 KEY_HANGEUL, KEY_HANJA, KEY_KATAKANA, KEY_HIRAGANA, KEY_ZENKAKUHANKAKU, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
69 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
70 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
71 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
72 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
73 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
74 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
75 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
76 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
77 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
78 KEY_LEFTCTRL, KEY_LEFTSHIFT, KEY_LEFTALT, KEY_LEFTMETA, KEY_RIGHTCTRL, KEY_RIGHTSHIFT, KEY_RIGHTALT, KEY_RIGHTMETA,
79 KEY_PLAYPAUSE, KEY_STOPCD, KEY_PREVIOUSSONG, KEY_NEXTSONG, KEY_EJECTCD, KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_MUTE,
80 KEY_WWW, KEY_BACK, KEY_FORWARD, KEY_STOP, KEY_FIND, KEY_SCROLLUP, KEY_SCROLLDOWN, KEY_EDIT, KEY_SLEEP,
81 KEY_SCREENLOCK, KEY_REFRESH, KEY_CALC, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED
82 };
83
84 static void dc_scan_kbd(struct dc_kbd *kbd)
85 {
86 struct input_dev *dev = kbd->dev;
87 void *ptr;
88 int code, keycode;
89 int i;
90
91 for (i = 0; i < 8; i++) {
92 code = i + 224;
93 keycode = kbd->keycode[code];
94 input_event(dev, EV_MSC, MSC_SCAN, code);
95 input_report_key(dev, keycode, (kbd->new[0] >> i) & 1);
96 }
97
98 for (i = 2; i < 8; i++) {
99 ptr = memchr(kbd->new + 2, kbd->old[i], 6);
100 code = kbd->old[i];
101 if (code > 3 && ptr == NULL) {
102 keycode = kbd->keycode[code];
103 if (keycode) {
104 input_event(dev, EV_MSC, MSC_SCAN, code);
105 input_report_key(dev, keycode, 0);
106 } else
107 printk(KERN_DEBUG "maple_keyb: "
108 "Unknown key (scancode %#x) released.",
109 code);
110 }
111 ptr = memchr(kbd->old + 2, kbd->new[i], 6);
112 code = kbd->new[i];
113 if (code > 3 && ptr) {
114 keycode = kbd->keycode[code];
115 if (keycode) {
116 input_event(dev, EV_MSC, MSC_SCAN, code);
117 input_report_key(dev, keycode, 1);
118 } else
119 printk(KERN_DEBUG "maple_keyb: "
120 "Unknown key (scancode %#x) pressed.",
121 code);
122 }
123 }
124 input_sync(dev);
125 memcpy(kbd->old, kbd->new, 8);
126 }
127
128 static void dc_kbd_callback(struct mapleq *mq)
129 {
130 struct maple_device *mapledev = mq->dev;
131 struct dc_kbd *kbd = mapledev->private_data;
132 unsigned long *buf = mq->recvbuf;
133
134 /*
135 * We should always be getting the lock because the only
136 * time it may be locked if driver is in cleanup phase.
137 */
138 if (likely(mutex_trylock(&maple_keyb_mutex))) {
139
140 if (buf[1] == mapledev->function) {
141 memcpy(kbd->new, buf + 2, 8);
142 dc_scan_kbd(kbd);
143 }
144
145 mutex_unlock(&maple_keyb_mutex);
146 }
147 }
148
149 static int dc_kbd_connect(struct maple_device *mdev)
150 {
151 int i, error;
152 struct dc_kbd *kbd;
153 struct input_dev *dev;
154
155 if (!(mdev->function & MAPLE_FUNC_KEYBOARD))
156 return -EINVAL;
157
158 kbd = kzalloc(sizeof(struct dc_kbd), GFP_KERNEL);
159 dev = input_allocate_device();
160 if (!kbd || !dev) {
161 error = -ENOMEM;
162 goto fail;
163 }
164
165 mdev->private_data = kbd;
166
167 kbd->dev = dev;
168 memcpy(kbd->keycode, dc_kbd_keycode, sizeof(kbd->keycode));
169
170 dev->name = mdev->product_name;
171 dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
172 dev->keycode = kbd->keycode;
173 dev->keycodesize = sizeof (unsigned short);
174 dev->keycodemax = ARRAY_SIZE(kbd->keycode);
175 dev->id.bustype = BUS_HOST;
176 dev->dev.parent = &mdev->dev;
177
178 for (i = 0; i < NR_SCANCODES; i++)
179 __set_bit(dc_kbd_keycode[i], dev->keybit);
180 __clear_bit(KEY_RESERVED, dev->keybit);
181
182 input_set_capability(dev, EV_MSC, MSC_SCAN);
183 input_set_drvdata(dev, kbd);
184
185 error = input_register_device(dev);
186 if (error)
187 goto fail;
188
189 /* Maple polling is locked to VBLANK - which may be just 50/s */
190 maple_getcond_callback(mdev, dc_kbd_callback, HZ/50, MAPLE_FUNC_KEYBOARD);
191 return 0;
192
193 fail:
194 input_free_device(dev);
195 kfree(kbd);
196 mdev->private_data = NULL;
197 return error;
198 }
199
200 static void dc_kbd_disconnect(struct maple_device *mdev)
201 {
202 struct dc_kbd *kbd;
203
204 mutex_lock(&maple_keyb_mutex);
205
206 kbd = mdev->private_data;
207 mdev->private_data = NULL;
208 input_unregister_device(kbd->dev);
209 kfree(kbd);
210
211 mutex_unlock(&maple_keyb_mutex);
212 }
213
214 /* allow the keyboard to be used */
215 static int probe_maple_kbd(struct device *dev)
216 {
217 struct maple_device *mdev = to_maple_dev(dev);
218 struct maple_driver *mdrv = to_maple_driver(dev->driver);
219 int error;
220
221 error = dc_kbd_connect(mdev);
222 if (error)
223 return error;
224
225 mdev->driver = mdrv;
226 mdev->registered = 1;
227
228 return 0;
229 }
230
231 static struct maple_driver dc_kbd_driver = {
232 .function = MAPLE_FUNC_KEYBOARD,
233 .connect = dc_kbd_connect,
234 .disconnect = dc_kbd_disconnect,
235 .drv = {
236 .name = "Dreamcast_keyboard",
237 .probe = probe_maple_kbd,
238 },
239 };
240
241 static int __init dc_kbd_init(void)
242 {
243 return maple_driver_register(&dc_kbd_driver.drv);
244 }
245
246 static void __exit dc_kbd_exit(void)
247 {
248 driver_unregister(&dc_kbd_driver.drv);
249 }
250
251 module_init(dc_kbd_init);
252 module_exit(dc_kbd_exit);
253
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