1 /* 2 * SEGA Dreamcast keyboard driver 3 * Based on drivers/usb/usbkbd.c 4 * Copyright (c) YAEGASHI Takeshi, 2001 5 * Porting to 2.6 Copyright (c) Adrian McMenamin, 2007 - 2009 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 31 /* Very simple mutex to ensure proper cleanup */ 32 static DEFINE_MUTEX(maple_keyb_mutex); 33 34 #define NR_SCANCODES 256 35 36 MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk"); 37 MODULE_DESCRIPTION("SEGA Dreamcast keyboard driver"); 38 MODULE_LICENSE("GPL"); 39 40 struct dc_kbd { 41 struct input_dev *dev; 42 unsigned short keycode[NR_SCANCODES]; 43 unsigned char new[8]; 44 unsigned char old[8]; 45 }; 46 47 static const unsigned short dc_kbd_keycode[NR_SCANCODES] = { 48 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_A, KEY_B, 49 KEY_C, KEY_D, KEY_E, KEY_F, KEY_G, KEY_H, KEY_I, KEY_J, KEY_K, KEY_L, 50 KEY_M, KEY_N, KEY_O, KEY_P, KEY_Q, KEY_R, KEY_S, KEY_T, KEY_U, KEY_V, 51 KEY_W, KEY_X, KEY_Y, KEY_Z, KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, 52 KEY_7, KEY_8, KEY_9, KEY_0, KEY_ENTER, KEY_ESC, KEY_BACKSPACE, 53 KEY_TAB, KEY_SPACE, KEY_MINUS, KEY_EQUAL, KEY_LEFTBRACE, 54 KEY_RIGHTBRACE, KEY_BACKSLASH, KEY_BACKSLASH, KEY_SEMICOLON, 55 KEY_APOSTROPHE, KEY_GRAVE, KEY_COMMA, KEY_DOT, KEY_SLASH, 56 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, 59 KEY_DELETE, KEY_END, KEY_PAGEDOWN, KEY_RIGHT, KEY_LEFT, KEY_DOWN, 60 KEY_UP, KEY_NUMLOCK, KEY_KPSLASH, KEY_KPASTERISK, KEY_KPMINUS, 61 KEY_KPPLUS, KEY_KPENTER, KEY_KP1, KEY_KP2, KEY_KP3, KEY_KP4, KEY_KP5, 62 KEY_KP6, KEY_KP7, KEY_KP8, KEY_KP9, KEY_KP0, KEY_KPDOT, KEY_102ND, 63 KEY_COMPOSE, KEY_POWER, KEY_KPEQUAL, KEY_F13, KEY_F14, KEY_F15, 64 KEY_F16, KEY_F17, KEY_F18, KEY_F19, KEY_F20, KEY_F21, KEY_F22, 65 KEY_F23, KEY_F24, KEY_OPEN, KEY_HELP, KEY_PROPS, KEY_FRONT, KEY_STOP, 66 KEY_AGAIN, KEY_UNDO, KEY_CUT, KEY_COPY, KEY_PASTE, KEY_FIND, KEY_MUTE, 67 KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, 68 KEY_KPCOMMA, KEY_RESERVED, KEY_RO, KEY_KATAKANAHIRAGANA , KEY_YEN, 69 KEY_HENKAN, KEY_MUHENKAN, KEY_KPJPCOMMA, KEY_RESERVED, KEY_RESERVED, 70 KEY_RESERVED, KEY_HANGEUL, KEY_HANJA, KEY_KATAKANA, KEY_HIRAGANA, 71 KEY_ZENKAKUHANKAKU, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, 72 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, 73 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, 74 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, 75 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, 76 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, 77 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, 78 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, 79 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, 80 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, 81 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, 82 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, 83 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, 84 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, 85 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, 86 KEY_RESERVED, KEY_RESERVED, KEY_LEFTCTRL, KEY_LEFTSHIFT, KEY_LEFTALT, 87 KEY_LEFTMETA, KEY_RIGHTCTRL, KEY_RIGHTSHIFT, KEY_RIGHTALT, 88 KEY_RIGHTMETA, KEY_PLAYPAUSE, KEY_STOPCD, KEY_PREVIOUSSONG, 89 KEY_NEXTSONG, KEY_EJECTCD, KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_MUTE, 90 KEY_WWW, KEY_BACK, KEY_FORWARD, KEY_STOP, KEY_FIND, KEY_SCROLLUP, 91 KEY_SCROLLDOWN, KEY_EDIT, KEY_SLEEP, KEY_SCREENLOCK, KEY_REFRESH, 92 KEY_CALC, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED 93 }; 94 95 static void dc_scan_kbd(struct dc_kbd *kbd) 96 { 97 struct input_dev *dev = kbd->dev; 98 void *ptr; 99 int code, keycode; 100 int i; 101 102 for (i = 0; i < 8; i++) { 103 code = i + 224; 104 keycode = kbd->keycode[code]; 105 input_event(dev, EV_MSC, MSC_SCAN, code); 106 input_report_key(dev, keycode, (kbd->new[0] >> i) & 1); 107 } 108 109 for (i = 2; i < 8; i++) { 110 ptr = memchr(kbd->new + 2, kbd->old[i], 6); 111 code = kbd->old[i]; 112 if (code > 3 && ptr == NULL) { 113 keycode = kbd->keycode[code]; 114 if (keycode) { 115 input_event(dev, EV_MSC, MSC_SCAN, code); 116 input_report_key(dev, keycode, 0); 117 } else 118 dev_dbg(&dev->dev, 119 "Unknown key (scancode %#x) released.", 120 code); 121 } 122 ptr = memchr(kbd->old + 2, kbd->new[i], 6); 123 code = kbd->new[i]; 124 if (code > 3 && ptr) { 125 keycode = kbd->keycode[code]; 126 if (keycode) { 127 input_event(dev, EV_MSC, MSC_SCAN, code); 128 input_report_key(dev, keycode, 1); 129 } else 130 dev_dbg(&dev->dev, 131 "Unknown key (scancode %#x) pressed.", 132 code); 133 } 134 } 135 input_sync(dev); 136 memcpy(kbd->old, kbd->new, 8); 137 } 138 139 static void dc_kbd_callback(struct mapleq *mq) 140 { 141 struct maple_device *mapledev = mq->dev; 142 struct dc_kbd *kbd = maple_get_drvdata(mapledev); 143 unsigned long *buf = (unsigned long *)(mq->recvbuf->buf); 144 145 /* 146 * We should always get the lock because the only 147 * time it may be locked is if the driver is in the cleanup phase. 148 */ 149 if (likely(mutex_trylock(&maple_keyb_mutex))) { 150 151 if (buf[1] == mapledev->function) { 152 memcpy(kbd->new, buf + 2, 8); 153 dc_scan_kbd(kbd); 154 } 155 156 mutex_unlock(&maple_keyb_mutex); 157 } 158 } 159 160 static int probe_maple_kbd(struct device *dev) 161 { 162 struct maple_device *mdev; 163 struct maple_driver *mdrv; 164 int i, error; 165 struct dc_kbd *kbd; 166 struct input_dev *idev; 167 168 mdev = to_maple_dev(dev); 169 mdrv = to_maple_driver(dev->driver); 170 171 kbd = kzalloc(sizeof(struct dc_kbd), GFP_KERNEL); 172 if (!kbd) { 173 error = -ENOMEM; 174 goto fail; 175 } 176 177 idev = input_allocate_device(); 178 if (!idev) { 179 error = -ENOMEM; 180 goto fail_idev_alloc; 181 } 182 183 kbd->dev = idev; 184 memcpy(kbd->keycode, dc_kbd_keycode, sizeof(kbd->keycode)); 185 186 idev->name = mdev->product_name; 187 idev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP); 188 idev->keycode = kbd->keycode; 189 idev->keycodesize = sizeof(unsigned short); 190 idev->keycodemax = ARRAY_SIZE(kbd->keycode); 191 idev->id.bustype = BUS_HOST; 192 idev->dev.parent = &mdev->dev; 193 194 for (i = 0; i < NR_SCANCODES; i++) 195 __set_bit(dc_kbd_keycode[i], idev->keybit); 196 __clear_bit(KEY_RESERVED, idev->keybit); 197 198 input_set_capability(idev, EV_MSC, MSC_SCAN); 199 input_set_drvdata(idev, kbd); 200 201 error = input_register_device(idev); 202 if (error) 203 goto fail_register; 204 205 /* Maple polling is locked to VBLANK - which may be just 50/s */ 206 maple_getcond_callback(mdev, dc_kbd_callback, HZ/50, 207 MAPLE_FUNC_KEYBOARD); 208 209 mdev->driver = mdrv; 210 211 maple_set_drvdata(mdev, kbd); 212 213 return error; 214 215 fail_register: 216 maple_set_drvdata(mdev, NULL); 217 input_free_device(idev); 218 fail_idev_alloc: 219 kfree(kbd); 220 fail: 221 return error; 222 } 223 224 static int remove_maple_kbd(struct device *dev) 225 { 226 struct maple_device *mdev = to_maple_dev(dev); 227 struct dc_kbd *kbd = maple_get_drvdata(mdev); 228 229 mutex_lock(&maple_keyb_mutex); 230 231 input_unregister_device(kbd->dev); 232 kfree(kbd); 233 234 maple_set_drvdata(mdev, NULL); 235 236 mutex_unlock(&maple_keyb_mutex); 237 return 0; 238 } 239 240 static struct maple_driver dc_kbd_driver = { 241 .function = MAPLE_FUNC_KEYBOARD, 242 .drv = { 243 .name = "Dreamcast_keyboard", 244 .probe = probe_maple_kbd, 245 .remove = remove_maple_kbd, 246 }, 247 }; 248 249 static int __init dc_kbd_init(void) 250 { 251 return maple_driver_register(&dc_kbd_driver); 252 } 253 254 static void __exit dc_kbd_exit(void) 255 { 256 maple_driver_unregister(&dc_kbd_driver); 257 } 258 259 module_init(dc_kbd_init); 260 module_exit(dc_kbd_exit); 261