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 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("YAEGASHI Takeshi, Adrian McMenamin"); 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, KEY_C, KEY_D, 49 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, 51 KEY_U, KEY_V, KEY_W, KEY_X, KEY_Y, KEY_Z, KEY_1, KEY_2, 52 KEY_3, KEY_4, KEY_5, KEY_6, KEY_7, KEY_8, KEY_9, KEY_0, 53 KEY_ENTER, KEY_ESC, KEY_BACKSPACE, KEY_TAB, KEY_SPACE, KEY_MINUS, KEY_EQUAL, KEY_LEFTBRACE, 54 KEY_RIGHTBRACE, KEY_BACKSLASH, KEY_BACKSLASH, KEY_SEMICOLON, KEY_APOSTROPHE, KEY_GRAVE, KEY_COMMA, 55 KEY_DOT, KEY_SLASH, KEY_CAPSLOCK, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, 56 KEY_F7, KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_F12, KEY_SYSRQ, 57 KEY_SCROLLLOCK, KEY_PAUSE, KEY_INSERT, KEY_HOME, KEY_PAGEUP, KEY_DELETE, 58 KEY_END, KEY_PAGEDOWN, KEY_RIGHT, KEY_LEFT, KEY_DOWN, KEY_UP, 59 KEY_NUMLOCK, KEY_KPSLASH, KEY_KPASTERISK, KEY_KPMINUS, KEY_KPPLUS, KEY_KPENTER, KEY_KP1, KEY_KP2, 60 KEY_KP3, KEY_KP4, KEY_KP5, KEY_KP6, KEY_KP7, KEY_KP8, KEY_KP9, KEY_KP0, KEY_KPDOT, 61 KEY_102ND, KEY_COMPOSE, KEY_POWER, KEY_KPEQUAL, KEY_F13, KEY_F14, KEY_F15, 62 KEY_F16, KEY_F17, KEY_F18, KEY_F19, KEY_F20, 63 KEY_F21, KEY_F22, KEY_F23, KEY_F24, KEY_OPEN, KEY_HELP, KEY_PROPS, KEY_FRONT, 64 KEY_STOP, KEY_AGAIN, KEY_UNDO, KEY_CUT, KEY_COPY, KEY_PASTE, KEY_FIND, KEY_MUTE, 65 KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_KPCOMMA, KEY_RESERVED, KEY_RO, KEY_KATAKANAHIRAGANA , KEY_YEN, 66 KEY_HENKAN, KEY_MUHENKAN, KEY_KPJPCOMMA, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, 67 KEY_HANGEUL, KEY_HANJA, KEY_KATAKANA, KEY_HIRAGANA, KEY_ZENKAKUHANKAKU, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, 68 KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, 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_LEFTCTRL, KEY_LEFTSHIFT, KEY_LEFTALT, KEY_LEFTMETA, KEY_RIGHTCTRL, KEY_RIGHTSHIFT, KEY_RIGHTALT, KEY_RIGHTMETA, 78 KEY_PLAYPAUSE, KEY_STOPCD, KEY_PREVIOUSSONG, KEY_NEXTSONG, KEY_EJECTCD, KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_MUTE, 79 KEY_WWW, KEY_BACK, KEY_FORWARD, KEY_STOP, KEY_FIND, KEY_SCROLLUP, KEY_SCROLLDOWN, KEY_EDIT, KEY_SLEEP, 80 KEY_SCREENLOCK, KEY_REFRESH, KEY_CALC, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED 81 }; 82 83 static void dc_scan_kbd(struct dc_kbd *kbd) 84 { 85 struct input_dev *dev = kbd->dev; 86 void *ptr; 87 int code, keycode; 88 int i; 89 90 for (i = 0; i < 8; i++) { 91 code = i + 224; 92 keycode = kbd->keycode[code]; 93 input_event(dev, EV_MSC, MSC_SCAN, code); 94 input_report_key(dev, keycode, (kbd->new[0] >> i) & 1); 95 } 96 97 for (i = 2; i < 8; i++) { 98 ptr = memchr(kbd->new + 2, kbd->old[i], 6); 99 code = kbd->old[i]; 100 if (code > 3 && ptr == NULL) { 101 keycode = kbd->keycode[code]; 102 if (keycode) { 103 input_event(dev, EV_MSC, MSC_SCAN, code); 104 input_report_key(dev, keycode, 0); 105 } else 106 printk(KERN_DEBUG "maple_keyb: " 107 "Unknown key (scancode %#x) released.", 108 code); 109 } 110 ptr = memchr(kbd->old + 2, kbd->new[i], 6); 111 code = kbd->new[i]; 112 if (code > 3 && ptr) { 113 keycode = kbd->keycode[code]; 114 if (keycode) { 115 input_event(dev, EV_MSC, MSC_SCAN, code); 116 input_report_key(dev, keycode, 1); 117 } else 118 printk(KERN_DEBUG "maple_keyb: " 119 "Unknown key (scancode %#x) pressed.", 120 code); 121 } 122 } 123 input_sync(dev); 124 memcpy(kbd->old, kbd->new, 8); 125 } 126 127 static void dc_kbd_callback(struct mapleq *mq) 128 { 129 struct maple_device *mapledev = mq->dev; 130 struct dc_kbd *kbd = mapledev->private_data; 131 unsigned long *buf = mq->recvbuf; 132 133 /* 134 * We should always be getting the lock because the only 135 * time it may be locked if driver is in cleanup phase. 136 */ 137 if (likely(mutex_trylock(&maple_keyb_mutex))) { 138 139 if (buf[1] == mapledev->function) { 140 memcpy(kbd->new, buf + 2, 8); 141 dc_scan_kbd(kbd); 142 } 143 144 mutex_unlock(&maple_keyb_mutex); 145 } 146 } 147 148 static int dc_kbd_connect(struct maple_device *mdev) 149 { 150 int i, error; 151 struct dc_kbd *kbd; 152 struct input_dev *dev; 153 154 if (!(mdev->function & MAPLE_FUNC_KEYBOARD)) 155 return -EINVAL; 156 157 kbd = kzalloc(sizeof(struct dc_kbd), GFP_KERNEL); 158 dev = input_allocate_device(); 159 if (!kbd || !dev) { 160 error = -ENOMEM; 161 goto fail; 162 } 163 164 mdev->private_data = kbd; 165 166 kbd->dev = dev; 167 memcpy(kbd->keycode, dc_kbd_keycode, sizeof(kbd->keycode)); 168 169 dev->name = mdev->product_name; 170 dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP); 171 dev->keycode = kbd->keycode; 172 dev->keycodesize = sizeof (unsigned short); 173 dev->keycodemax = ARRAY_SIZE(kbd->keycode); 174 dev->id.bustype = BUS_HOST; 175 dev->dev.parent = &mdev->dev; 176 177 for (i = 0; i < NR_SCANCODES; i++) 178 __set_bit(dc_kbd_keycode[i], dev->keybit); 179 __clear_bit(KEY_RESERVED, dev->keybit); 180 181 input_set_capability(dev, EV_MSC, MSC_SCAN); 182 input_set_drvdata(dev, kbd); 183 184 error = input_register_device(dev); 185 if (error) 186 goto fail; 187 188 /* Maple polling is locked to VBLANK - which may be just 50/s */ 189 maple_getcond_callback(mdev, dc_kbd_callback, HZ/50, MAPLE_FUNC_KEYBOARD); 190 return 0; 191 192 fail: 193 input_free_device(dev); 194 kfree(kbd); 195 mdev->private_data = NULL; 196 return error; 197 } 198 199 static void dc_kbd_disconnect(struct maple_device *mdev) 200 { 201 struct dc_kbd *kbd; 202 203 mutex_lock(&maple_keyb_mutex); 204 205 kbd = mdev->private_data; 206 mdev->private_data = NULL; 207 input_unregister_device(kbd->dev); 208 kfree(kbd); 209 210 mutex_unlock(&maple_keyb_mutex); 211 } 212 213 /* allow the keyboard to be used */ 214 static int probe_maple_kbd(struct device *dev) 215 { 216 struct maple_device *mdev = to_maple_dev(dev); 217 struct maple_driver *mdrv = to_maple_driver(dev->driver); 218 int error; 219 220 error = dc_kbd_connect(mdev); 221 if (error) 222 return error; 223 224 mdev->driver = mdrv; 225 mdev->registered = 1; 226 227 return 0; 228 } 229 230 static struct maple_driver dc_kbd_driver = { 231 .function = MAPLE_FUNC_KEYBOARD, 232 .connect = dc_kbd_connect, 233 .disconnect = dc_kbd_disconnect, 234 .drv = { 235 .name = "Dreamcast_keyboard", 236 .probe = probe_maple_kbd, 237 }, 238 }; 239 240 static int __init dc_kbd_init(void) 241 { 242 return maple_driver_register(&dc_kbd_driver.drv); 243 } 244 245 static void __exit dc_kbd_exit(void) 246 { 247 driver_unregister(&dc_kbd_driver.drv); 248 } 249 250 module_init(dc_kbd_init); 251 module_exit(dc_kbd_exit); 252