drivers/char/q40_keyb.c

   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 int q40kbd_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         return 0;
 227 }
 228
 229 int q40kbd_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 int q40kbd_translate(unsigned char scancode, unsigned char *keycode,
 245                     char raw_mode)
 246 {
 247         if (scancode == 0xe0 || scancode == 0xe1) {
 248                 prev_scancode = scancode;
 249                 return 0;
 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                   return 0;
 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                   return 0;
 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                 return 0;
 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                   return 0;
 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               return 0;
 322           }
 323         } else
 324           *keycode = scancode;
 325         return 1;
 326 }
 327
 328 char q40kbd_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             return 0;
 334         else
 335             return 0200;
 336 }
 337
 338 static int keyup=0;
 339 static int qprev=0;
 340
 341 static void keyboard_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 int kbd_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 extern void q40kbd_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