drivers/char/q40_keyb.c

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 1 /*
 2  * linux/drivers/char/q40_keyb.c
 3  *
 4  */
 5
 6 #include <linux/config.h>
 7
 8 #include <linux/spinlock.h>
 9 #include <linux/sched.h>
 10 #include <linux/interrupt.h>
 11 #include <linux/tty.h>
 12 #include <linux/mm.h>
 13 #include <linux/signal.h>
 14 #include <linux/ioport.h>
 15 #include <linux/init.h>
 16 #include <linux/kbd_ll.h>
 17 #include <linux/delay.h>
 18 #include <linux/sysrq.h>
 19 #include <linux/random.h>
 20 #include <linux/poll.h>
 21 #include <linux/miscdevice.h>
 22 #include <linux/malloc.h>
 23
 24 #include <asm/keyboard.h>
 25 #include <asm/bitops.h>
 26 #include <asm/io.h>
 27 #include <asm/uaccess.h>
 28 #include <asm/q40_master.h>
 29 #include <asm/irq.h>
 30 #include <asm/q40ints.h>
 31
 32 /* Some configuration switches are present in the include file... */
 33
 34 #define KBD_REPORT_ERR
 35
 36 /* Simple translation table for the SysRq keys */
 37
 38 #define SYSRQ_KEY 0x54
 39
 40 #ifdef CONFIG_MAGIC_SYSRQ
 41 unsigned char q40kbd_sysrq_xlate[128] =
 42 "\000\0331234567890-=\177\t"/* 0x00 - 0x0f */
 43 "qwertyuiop[]\r\000as"/* 0x10 - 0x1f */
 44 "dfghjkl;'`\000\\zxcv"/* 0x20 - 0x2f */
 45 "bnm,./\000*\000 \000\201\202\203\204\205"/* 0x30 - 0x3f */
 46 "\206\207\210\211\212\000\000789-456+1"/* 0x40 - 0x4f */
 47 "230\177\000\000\213\214\000\000\000\000\000\000\000\000\000\000"/* 0x50 - 0x5f */
 48 "\r\000/";/* 0x60 - 0x6f */
 49 #endif
 50
 51 /* Q40 uses AT scancodes - no way to change it. so we have to translate ..*/
 52 /* 0x00 means not a valid entry or no conversion known */
 53
 54 unsigned static char q40cl[256] =
 55 {/* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, */
 56 0x00,0x43,0x00,0x3f,0x3d,0x3b,0x3c,0x58,0x00,0x44,0x42,0x40,0x3e,0x0f,0x29,0x00,/* 0x00 - 0x0f */
 57 0x00,0x38,0x2a,0x00,0x1d,0x10,0x02,0x00,0x00,0x00,0x2c,0x1f,0x1e,0x11,0x03,0x00,/* 0x10 - 0x1f */
 58 0x00,0x2e,0x2d,0x20,0x12,0x05,0x04,0x00,0x21,0x39,0x2f,0x21,0x14,0x13,0x06,0x00,/* 0x20 - 0x2f 'f' is at 0x2b, what is 0x28 ???*/
 59 0x00,0x31,0x30,0x23,0x22,0x15,0x07,0x00,0x24,0x00,0x32,0x24,0x16,0x08,0x09,0x00,/* 0x30 - 0x3f */
 60 0x00,0x33,0x25,0x17,0x18,0x0b,0x0a,0x00,0x00,0x34,0x35,0x26,0x27,0x19,0x0c,0x00,/* 0x40 - 0x4f */
 61 0x00,0x00,0x28,0x00,0x1a,0x0d,0x00,0x00,0x3a,0x36,0x1c,0x1b,0x00,0x2b,0x00,0x00,/* 0x50 - 0x5f*/
 62 0x00,0x56,0x00,0x00,0x00,0x00,0x0e,0x00,0x00,0x4f,0x00,0x4b,0x47,0x00,0x00,0x00,/* 0x60 - 0x6f */
 63 0x52,0x53,0x50,0x4c,0x4d,0x48,0x01,0x45,0x57,0x4e,0x51,0x4a,0x37,0x49,0x46,0x00,/* 0x70 - 0x7f */
 64 0x00,0x00,0x00,0x41,0x37,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/* 0x80 - 0x8f 0x84/0x37 is SySrq*/
 65 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/* 0x90 - 0x9f */
 66 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/* 0xa0 - 0xaf */
 67 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/* 0xb0 - 0xbf */
 68 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/* 0xc0 - 0xcf */
 69 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/* 0xd0 - 0xdf */
 70 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/* 0xe0 - 0xef */
 71 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/* 0xf0 - 0xff */
 72 };
 73
 74 /* another table, AT 0xe0 codes to PC 0xe0 codes,
 75  0xff special entry for SysRq - DROPPED right now */
 76 static unsigned char q40ecl[]=
 77 {/* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, */
 78 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/* 0x00 - 0x0f*/
 79 0x00,0x38,0x2a,0x00,0x1d,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/* 0x10 - 0x1f */
 80 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/* 0x20 - 0x2f*/
 81 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/* 0x30 - 0x3f*/
 82 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x35,0x00,0x00,0x00,0x00,0x00,/* 0x40 - 0x4f*/
 83 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x36,0x1c,0x00,0x00,0x00,0x00,0x00,/* 0x50 - 0x5f*/
 84 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x4f,0x00,0x4b,0x47,0x00,0x00,0x00,/* 0x60 - 0x6f*/
 85 0x52,0x53,0x50,0x00,0x4d,0x48,0x00,0x00,0x00,0x00,0x51,0x00,0x00,0x49,0x00,0x00,/* 0x70 - 0x7f*/
 86 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/* 0x80 - 0x8f*/
 87 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/* 0x90 - 0x9f*/
 88 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/* 0xa0 - 0xaf*/
 89 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/* 0xb0 - 0xbf*/
 90 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/* 0xc0 - 0xcf*/
 91 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/* 0xd0 - 0xdf*/
 92 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/* 0xe0 - 0xef*/
 93 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00/* 0xf0 - 0xff*/
 94 };
 95
 96
 97 spinlock_t kbd_controller_lock = SPIN_LOCK_UNLOCKED;
 98
 99
 100 /*
 101  * Translation of escaped scancodes to keycodes.
 102  * This is now user-settable.
 103  * The keycodes 1-88,96-111,119 are fairly standard, and
 104  * should probably not be changed - changing might confuse X.
 105  * X also interprets scancode 0x5d (KEY_Begin).
 106  *
 107  * For 1-88 keycode equals scancode.
 108  */
 109
 110 #define E0_KPENTER 96
 111 #define E0_RCTRL 97
 112 #define E0_KPSLASH 98
 113 #define E0_PRSCR 99
 114 #define E0_RALT 100
 115 #define E0_BREAK 101/* (control-pause) */
 116 #define E0_HOME 102
 117 #define E0_UP 103
 118 #define E0_PGUP 104
 119 #define E0_LEFT 105
 120 #define E0_RIGHT 106
 121 #define E0_END 107
 122 #define E0_DOWN 108
 123 #define E0_PGDN 109
 124 #define E0_INS 110
 125 #define E0_DEL 111
 126
 127 #define E1_PAUSE 119
 128
 129 /*
 130  * The keycodes below are randomly located in 89-95,112-118,120-127.
 131  * They could be thrown away (and all occurrences below replaced by 0),
 132  * but that would force many users to use the `setkeycodes' utility, where
 133  * they needed not before. It does not matter that there are duplicates, as
 134  * long as no duplication occurs for any single keyboard.
 135  */
 136 #define SC_LIM 89
 137
 138 #define FOCUS_PF1 85/* actual code! */
 139 #define FOCUS_PF2 89
 140 #define FOCUS_PF3 90
 141 #define FOCUS_PF4 91
 142 #define FOCUS_PF5 92
 143 #define FOCUS_PF6 93
 144 #define FOCUS_PF7 94
 145 #define FOCUS_PF8 95
 146 #define FOCUS_PF9 120
 147 #define FOCUS_PF10 121
 148 #define FOCUS_PF11 122
 149 #define FOCUS_PF12 123
 150
 151 #define JAP_86 124
 152 /* tfj@olivia.ping.dk:
 153  * The four keys are located over the numeric keypad, and are
 154  * labelled A1-A4. It's an rc930 keyboard, from
 155  * Regnecentralen/RC International, Now ICL.
 156  * Scancodes: 59, 5a, 5b, 5c.
 157  */
 158 #define RGN1 124
 159 #define RGN2 125
 160 #define RGN3 126
 161 #define RGN4 127
 162
 163 static unsigned char high_keys[128- SC_LIM] = {
 164  RGN1, RGN2, RGN3, RGN4,0,0,0,/* 0x59-0x5f */
 165 0,0,0,0,0,0,0,0,/* 0x60-0x67 */
 166 0,0,0,0,0, FOCUS_PF11,0, FOCUS_PF12,/* 0x68-0x6f */
 167 0,0,0, FOCUS_PF2, FOCUS_PF9,0,0, FOCUS_PF3,/* 0x70-0x77 */
 168  FOCUS_PF4, FOCUS_PF5, FOCUS_PF6, FOCUS_PF7,/* 0x78-0x7b */
 169  FOCUS_PF8, JAP_86, FOCUS_PF10,0/* 0x7c-0x7f */
 170 };
 171
 172 /* BTC */
 173 #define E0_MACRO 112
 174 /* LK450 */
 175 #define E0_F13 113
 176 #define E0_F14 114
 177 #define E0_HELP 115
 178 #define E0_DO 116
 179 #define E0_F17 117
 180 #define E0_KPMINPLUS 118
 181 /*
 182  * My OmniKey generates e0 4c for the "OMNI" key and the
 183  * right alt key does nada. [kkoller@nyx10.cs.du.edu]
 184  */
 185 #define E0_OK 124
 186 /*
 187  * New microsoft keyboard is rumoured to have
 188  * e0 5b (left window button), e0 5c (right window button),
 189  * e0 5d (menu button). [or: LBANNER, RBANNER, RMENU]
 190  * [or: Windows_L, Windows_R, TaskMan]
 191  */
 192 #define E0_MSLW 125
 193 #define E0_MSRW 126
 194 #define E0_MSTM 127
 195
 196 /* this can be changed using setkeys : */
 197 static unsigned char e0_keys[128] = {
 198 0,0,0,0,0,0,0,0,/* 0x00-0x07 */
 199 0,0,0,0,0,0,0,0,/* 0x08-0x0f */
 200 0,0,0,0,0,0,0,0,/* 0x10-0x17 */
 201 0,0,0,0, E0_KPENTER, E0_RCTRL,0,0,/* 0x18-0x1f */
 202 0,0,0,0,0,0,0,0,/* 0x20-0x27 */
 203 0,0,0,0,0,0,0,0,/* 0x28-0x2f */
 204 0,0,0,0,0, E0_KPSLASH,0, E0_PRSCR,/* 0x30-0x37 */
 205  E0_RALT,0,0,0,0, E0_F13, E0_F14, E0_HELP,/* 0x38-0x3f */
 206  E0_DO, E0_F17,0,0,0,0, E0_BREAK, E0_HOME,/* 0x40-0x47 */
 207  E0_UP, E0_PGUP,0, E0_LEFT, E0_OK, E0_RIGHT, E0_KPMINPLUS, E0_END,/* 0x48-0x4f */
 208  E0_DOWN, E0_PGDN, E0_INS, E0_DEL,0,0,0,0,/* 0x50-0x57 */
 209 0,0,0, E0_MSLW, E0_MSRW, E0_MSTM,0,0,/* 0x58-0x5f */
 210 0,0,0,0,0,0,0,0,/* 0x60-0x67 */
 211 0,0,0,0,0,0,0, E0_MACRO,/* 0x68-0x6f */
 212 0,0,0,0,0,0,0,0,/* 0x70-0x77 */
 213 0,0,0,0,0,0,0,0/* 0x78-0x7f */
 214 };
 215
 216 static unsigned int prev_scancode =0;/* remember E0, E1 */
 217
 218 intq40kbd_setkeycode(unsigned int scancode,unsigned int keycode)
 219 {
 220 if(scancode < SC_LIM || scancode >255|| keycode >127)
 221 return-EINVAL;
 222 if(scancode <128)
 223  high_keys[scancode - SC_LIM] = keycode;
 224 else
 225  e0_keys[scancode -128] = keycode;
 226 return0;
 227 }
 228
 229 intq40kbd_getkeycode(unsigned int scancode)
 230 {
 231 return
 232 (scancode < SC_LIM || scancode >255) ? -EINVAL :
 233 (scancode <128) ? high_keys[scancode - SC_LIM] :
 234  e0_keys[scancode -128];
 235 }
 236
 237
 238 #define disable_keyboard()
 239 #define enable_keyboard()
 240
 241
 242
 243
 244 intq40kbd_translate(unsigned char scancode,unsigned char*keycode,
 245 char raw_mode)
 246 {
 247 if(scancode ==0xe0|| scancode ==0xe1) {
 248  prev_scancode = scancode;
 249 return0;
 250 }
 251
 252 if(prev_scancode) {
 253 /*
 254  * usually it will be 0xe0, but a Pause key generates
 255  * e1 1d 45 e1 9d c5 when pressed, and nothing when released
 256  */
 257 if(prev_scancode !=0xe0) {
 258 if(prev_scancode ==0xe1&& scancode ==0x1d) {
 259  prev_scancode =0x100;
 260 return0;
 261 }else if(prev_scancode ==0x100&& scancode ==0x45) {
 262 *keycode = E1_PAUSE;
 263  prev_scancode =0;
 264 }else{
 265 #ifdef KBD_REPORT_UNKN
 266 if(!raw_mode)
 267 printk(KERN_INFO "keyboard: unknown e1 escape sequence\n");
 268 #endif
 269  prev_scancode =0;
 270 return0;
 271 }
 272 }else{
 273  prev_scancode =0;
 274 /*
 275  * The keyboard maintains its own internal caps lock and
 276  * num lock statuses. In caps lock mode E0 AA precedes make
 277  * code and E0 2A follows break code. In num lock mode,
 278  * E0 2A precedes make code and E0 AA follows break code.
 279  * We do our own book-keeping, so we will just ignore these.
 280  */
 281 /*
 282  * For my keyboard there is no caps lock mode, but there are
 283  * both Shift-L and Shift-R modes. The former mode generates
 284  * E0 2A / E0 AA pairs, the latter E0 B6 / E0 36 pairs.
 285  * So, we should also ignore the latter. - aeb@cwi.nl
 286  */
 287 if(scancode ==0x2a|| scancode ==0x36)
 288 return0;
 289
 290 if(e0_keys[scancode])
 291 *keycode = e0_keys[scancode];
 292 else{
 293 #ifdef KBD_REPORT_UNKN
 294 if(!raw_mode)
 295 printk(KERN_INFO "keyboard: unknown scancode e0 %02x\n",
 296  scancode);
 297 #endif
 298 return0;
 299 }
 300 }
 301 }else if(scancode >= SC_LIM) {
 302 /* This happens with the FOCUS 9000 keyboard
 303  Its keys PF1..PF12 are reported to generate
 304  55 73 77 78 79 7a 7b 7c 74 7e 6d 6f
 305  Moreover, unless repeated, they do not generate
 306  key-down events, so we have to zero up_flag below */
 307 /* Also, Japanese 86/106 keyboards are reported to
 308  generate 0x73 and 0x7d for \ - and \ | respectively. */
 309 /* Also, some Brazilian keyboard is reported to produce
 310  0x73 and 0x7e for \ ? and KP-dot, respectively. */
 311
 312 *keycode = high_keys[scancode - SC_LIM];
 313
 314 if(!*keycode) {
 315 if(!raw_mode) {
 316 #ifdef KBD_REPORT_UNKN
 317 printk(KERN_INFO "keyboard: unrecognized scancode (%02x)"
 318 " - ignored\n", scancode);
 319 #endif
 320 }
 321 return0;
 322 }
 323 }else
 324 *keycode = scancode;
 325 return1;
 326 }
 327
 328 charq40kbd_unexpected_up(unsigned char keycode)
 329 {
 330 /* unexpected, but this can happen: maybe this was a key release for a
 331  FOCUS 9000 PF key; if we want to see it, we have to clear up_flag */
 332 if(keycode >= SC_LIM || keycode ==85)
 333 return0;
 334 else
 335 return0200;
 336 }
 337
 338 static int keyup=0;
 339 static int qprev=0;
 340
 341 static voidkeyboard_interrupt(int irq,void*dev_id,struct pt_regs *regs)
 342 {
 343 unsigned long flags;
 344 unsigned char status;
 345
 346 disable_keyboard();
 347 spin_lock_irqsave(&kbd_controller_lock, flags);
 348  kbd_pt_regs = regs;
 349
 350  status = IRQ_KEYB_MASK &master_inb(INTERRUPT_REG);
 351 if(status )
 352 {
 353 unsigned char scancode,qcode;
 354
 355  qcode =master_inb(KEYCODE_REG);
 356
 357 if(qcode !=0xf0)
 358 {
 359 if(qcode ==0xe0)
 360 {
 361  qprev=0xe0;
 362 handle_scancode(qprev ,1);
 363 goto exit;
 364 }
 365
 366  scancode=qprev ? q40ecl[qcode] : q40cl[qcode];
 367 #if 0
 368 /* next line is last resort to hanlde some oddities */
 369 if(qprev && !scancode) scancode=q40cl[qcode];
 370 #endif
 371  qprev=0;
 372 if(!scancode)
 373 {
 374 printk("unknown scancode %x\n",qcode);
 375 goto exit;
 376 }
 377 if(scancode==0xff)/* SySrq */
 378  scancode=SYSRQ_KEY;
 379
 380 handle_scancode(scancode, ! keyup );
 381  keyup=0;
 382 mark_bh(KEYBOARD_BH);
 383
 384 }
 385 else
 386  keyup=1;
 387 }
 388 exit:
 389 spin_unlock_irqrestore(&kbd_controller_lock, flags);
 390 master_outb(-1,KEYBOARD_UNLOCK_REG);/* keyb ints reenabled herewith */
 391 enable_keyboard();
 392 }
 393
 394
 395
 396
 397 #ifdef CONFIG_MAGIC_SYSRQ
 398 intkbd_is_sysrq(unsigned char keycode)
 399 {
 400 return( keycode == SYSRQ_KEY );
 401 }
 402 #endif/* CONFIG_MAGIC_SYSRQ */
 403
 404
 405
 406
 407 #define KBD_NO_DATA (-1)/* No data */
 408 #define KBD_BAD_DATA (-2)/* Parity or other error */
 409
 410 static int __init kbd_read_input(void)
 411 {
 412 int retval = KBD_NO_DATA;
 413 unsigned char status;
 414
 415  status = IRQ_KEYB_MASK &master_inb(INTERRUPT_REG);
 416 if(status) {
 417 unsigned char data =master_inb(KEYCODE_REG);
 418
 419  retval = data;
 420 master_outb(-1,KEYBOARD_UNLOCK_REG);
 421 }
 422 return retval;
 423 }
 424
 425 externvoidq40kbd_leds(unsigned char leds)
 426 {/* nothing can be done */}
 427
 428 static void __init kbd_clear_input(void)
 429 {
 430 int maxread =100;/* Random number */
 431
 432 do{
 433 if(kbd_read_input() == KBD_NO_DATA)
 434 break;
 435 }while(--maxread);
 436 }
 437
 438
 439 void __init q40kbd_init_hw(void)
 440 {
 441 #if 0
 442 /* Get the keyboard controller registers (incomplete decode) */
 443 request_region(0x60,16,"keyboard");
 444 #endif
 445 /* Flush any pending input. */
 446 kbd_clear_input();
 447
 448 /* Ok, finally allocate the IRQ, and off we go.. */
 449 request_irq(Q40_IRQ_KEYBOARD, keyboard_interrupt,0,"keyboard", NULL);
 450 master_outb(-1,KEYBOARD_UNLOCK_REG);
 451 master_outb(1,KEY_IRQ_ENABLE_REG);
 452
 453 }
 454