LXR uboot/board/mpl/common/kbd.c

   1/*
   2 * (C) Copyright 2001
   3 * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch
   4 *
   5 * SPDX-License-Identifier:     GPL-2.0+
   6 *
   7 * Source partly derived from:
   8 * linux/drivers/char/pc_keyb.c
   9 */
  10#include <common.h>
  11#include <console.h>
  12#include <asm/processor.h>
  13#include <stdio_dev.h>
  14#include "isa.h"
  15#include "kbd.h"
  16
  17
  18unsigned char kbd_read_status(void);
  19unsigned char kbd_read_input(void);
  20void kbd_send_data(unsigned char data);
  21void disable_8259A_irq(unsigned int irq);
  22void enable_8259A_irq(unsigned int irq);
  23
  24/* used only by send_data - set by keyboard_interrupt */
  25
  26
  27#undef KBG_DEBUG
  28
  29#ifdef KBG_DEBUG
  30#define PRINTF(fmt,args...)     printf (fmt ,##args)
  31#else
  32#define PRINTF(fmt,args...)
  33#endif
  34
  35#define KBD_STAT_KOBF           0x01
  36#define KBD_STAT_IBF            0x02
  37#define KBD_STAT_SYS            0x04
  38#define KBD_STAT_CD             0x08
  39#define KBD_STAT_LOCK           0x10
  40#define KBD_STAT_MOBF           0x20
  41#define KBD_STAT_TI_OUT         0x40
  42#define KBD_STAT_PARERR         0x80
  43
  44#define KBD_INIT_TIMEOUT        1000    /* Timeout in ms for initializing the keyboard */
  45#define KBC_TIMEOUT             250     /* Timeout in ms for sending to keyboard controller */
  46#define KBD_TIMEOUT             2000    /* Timeout in ms for keyboard command acknowledge */
  47/*
  48 *      Keyboard Controller Commands
  49 */
  50
  51#define KBD_CCMD_READ_MODE      0x20    /* Read mode bits */
  52#define KBD_CCMD_WRITE_MODE     0x60    /* Write mode bits */
  53#define KBD_CCMD_GET_VERSION    0xA1    /* Get controller version */
  54#define KBD_CCMD_MOUSE_DISABLE  0xA7    /* Disable mouse interface */
  55#define KBD_CCMD_MOUSE_ENABLE   0xA8    /* Enable mouse interface */
  56#define KBD_CCMD_TEST_MOUSE     0xA9    /* Mouse interface test */
  57#define KBD_CCMD_SELF_TEST      0xAA    /* Controller self test */
  58#define KBD_CCMD_KBD_TEST       0xAB    /* Keyboard interface test */
  59#define KBD_CCMD_KBD_DISABLE    0xAD    /* Keyboard interface disable */
  60#define KBD_CCMD_KBD_ENABLE     0xAE    /* Keyboard interface enable */
  61#define KBD_CCMD_WRITE_AUX_OBUF 0xD3    /* Write to output buffer as if
  62                                           initiated by the auxiliary device */
  63#define KBD_CCMD_WRITE_MOUSE    0xD4    /* Write the following byte to the mouse */
  64
  65/*
  66 *      Keyboard Commands
  67 */
  68
  69#define KBD_CMD_SET_LEDS        0xED    /* Set keyboard leds */
  70#define KBD_CMD_SET_RATE        0xF3    /* Set typematic rate */
  71#define KBD_CMD_ENABLE          0xF4    /* Enable scanning */
  72#define KBD_CMD_DISABLE         0xF5    /* Disable scanning */
  73#define KBD_CMD_RESET           0xFF    /* Reset */
  74
  75/*
  76 *      Keyboard Replies
  77 */
  78
  79#define KBD_REPLY_POR           0xAA    /* Power on reset */
  80#define KBD_REPLY_ACK           0xFA    /* Command ACK */
  81#define KBD_REPLY_RESEND        0xFE    /* Command NACK, send the cmd again */
  82
  83/*
  84 *      Status Register Bits
  85 */
  86
  87#define KBD_STAT_OBF            0x01    /* Keyboard output buffer full */
  88#define KBD_STAT_IBF            0x02    /* Keyboard input buffer full */
  89#define KBD_STAT_SELFTEST       0x04    /* Self test successful */
  90#define KBD_STAT_CMD            0x08    /* Last write was a command write (0=data) */
  91#define KBD_STAT_UNLOCKED       0x10    /* Zero if keyboard locked */
  92#define KBD_STAT_MOUSE_OBF      0x20    /* Mouse output buffer full */
  93#define KBD_STAT_GTO            0x40    /* General receive/xmit timeout */
  94#define KBD_STAT_PERR           0x80    /* Parity error */
  95
  96#define AUX_STAT_OBF (KBD_STAT_OBF | KBD_STAT_MOUSE_OBF)
  97
  98/*
  99 *      Controller Mode Register Bits
 100 */
 101
 102#define KBD_MODE_KBD_INT        0x01    /* Keyboard data generate IRQ1 */
 103#define KBD_MODE_MOUSE_INT      0x02    /* Mouse data generate IRQ12 */
 104#define KBD_MODE_SYS            0x04    /* The system flag (?) */
 105#define KBD_MODE_NO_KEYLOCK     0x08    /* The keylock doesn't affect the keyboard if set */
 106#define KBD_MODE_DISABLE_KBD    0x10    /* Disable keyboard interface */
 107#define KBD_MODE_DISABLE_MOUSE  0x20    /* Disable mouse interface */
 108#define KBD_MODE_KCC            0x40    /* Scan code conversion to PC format */
 109#define KBD_MODE_RFU            0x80
 110
 111
 112#define KDB_DATA_PORT           0x60
 113#define KDB_COMMAND_PORT        0x64
 114
 115#define LED_SCR                 0x01    /* scroll lock led */
 116#define LED_CAP                 0x04    /* caps lock led */
 117#define LED_NUM                 0x02    /* num lock led */
 118
 119#define KBD_BUFFER_LEN          0x20    /* size of the keyboardbuffer */
 120
 121
 122static volatile char kbd_buffer[KBD_BUFFER_LEN];
 123static volatile int in_pointer = 0;
 124static volatile int out_pointer = 0;
 125
 126
 127static unsigned char num_lock = 0;
 128static unsigned char caps_lock = 0;
 129static unsigned char scroll_lock = 0;
 130static unsigned char shift = 0;
 131static unsigned char ctrl = 0;
 132static unsigned char alt = 0;
 133static unsigned char e0 = 0;
 134static unsigned char leds = 0;
 135
 136#define DEVNAME "kbd"
 137
 138/* Simple translation table for the keys */
 139
 140static unsigned char kbd_plain_xlate[] = {
 141        0xff,0x1b, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=','\b','\t',        /* 0x00 - 0x0f */
 142         'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']','\r',0xff, 'a', 's',        /* 0x10 - 0x1f */
 143         'd', 'f', 'g', 'h', 'j', 'k', 'l', ';','\'', '`',0xff,'\\', 'z', 'x', 'c', 'v',        /* 0x20 - 0x2f */
 144         'b', 'n', 'm', ',', '.', '/',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff,        /* 0x30 - 0x3f */
 145        0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1',        /* 0x40 - 0x4f */
 146         '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,  /* 0x50 - 0x5F */
 147        '\r',0xff,0xff
 148        };
 149
 150static unsigned char kbd_shift_xlate[] = {
 151        0xff,0x1b, '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+','\b','\t',        /* 0x00 - 0x0f */
 152         'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}','\r',0xff, 'A', 'S',        /* 0x10 - 0x1f */
 153         'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~',0xff, '|', 'Z', 'X', 'C', 'V',        /* 0x20 - 0x2f */
 154         'B', 'N', 'M', '<', '>', '?',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff,        /* 0x30 - 0x3f */
 155        0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1',        /* 0x40 - 0x4f */
 156         '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,  /* 0x50 - 0x5F */
 157        '\r',0xff,0xff
 158        };
 159
 160static unsigned char kbd_ctrl_xlate[] = {
 161        0xff,0x1b, '1',0x00, '3', '4', '5',0x1E, '7', '8', '9', '0',0x1F, '=','\b','\t',        /* 0x00 - 0x0f */
 162        0x11,0x17,0x05,0x12,0x14,0x18,0x15,0x09,0x0f,0x10,0x1b,0x1d,'\n',0xff,0x01,0x13,        /* 0x10 - 0x1f */
 163        0x04,0x06,0x08,0x09,0x0a,0x0b,0x0c, ';','\'', '~',0x00,0x1c,0x1a,0x18,0x03,0x16,        /* 0x20 - 0x2f */
 164        0x02,0x0e,0x0d, '<', '>', '?',0xff,0xff,0xff,0x00,0xff,0xff,0xff,0xff,0xff,0xff,        /* 0x30 - 0x3f */
 165        0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1',        /* 0x40 - 0x4f */
 166         '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,  /* 0x50 - 0x5F */
 167        '\r',0xff,0xff
 168        };
 169
 170/******************************************************************
 171 * Init
 172 ******************************************************************/
 173int isa_kbd_init(void)
 174{
 175        char* result;
 176        result=kbd_initialize();
 177        if(result==NULL) {
 178                PRINTF("AT Keyboard initialized\n");
 179                irq_install_handler(25, (interrupt_handler_t *)handle_isa_int, NULL);
 180                isa_irq_install_handler(KBD_INTERRUPT, (interrupt_handler_t *)kbd_interrupt, NULL);
 181                return (1);
 182        } else {
 183                printf("%s\n",result);
 184                return (-1);
 185        }
 186}
 187
 188#ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
 189extern int overwrite_console (void);
 190#else
 191int overwrite_console (void)
 192{
 193        return (0);
 194}
 195#endif
 196
 197int drv_isa_kbd_init (void)
 198{
 199        int error;
 200        struct stdio_dev kbddev ;
 201        char *stdinname  = getenv ("stdin");
 202
 203        if(isa_kbd_init()==-1)
 204                return -1;
 205        memset (&kbddev, 0, sizeof(kbddev));
 206        strcpy(kbddev.name, DEVNAME);
 207        kbddev.flags =  DEV_FLAGS_INPUT;
 208        kbddev.getc = kbd_getc ;
 209        kbddev.tstc = kbd_testc ;
 210
 211        error = stdio_register (&kbddev);
 212        if(error==0) {
 213                /* check if this is the standard input device */
 214                if(strcmp(stdinname,DEVNAME)==0) {
 215                        /* reassign the console */
 216                        if(overwrite_console()) {
 217                                return 1;
 218                        }
 219                        error=console_assign(stdin,DEVNAME);
 220                        if(error==0)
 221                                return 1;
 222                        else
 223                                return error;
 224                }
 225                return 1;
 226        }
 227        return error;
 228}
 229
 230/******************************************************************
 231 * Queue handling
 232 ******************************************************************/
 233/* puts character in the queue and sets up the in and out pointer */
 234void kbd_put_queue(char data)
 235{
 236        if((in_pointer+1)==KBD_BUFFER_LEN) {
 237                if(out_pointer==0) {
 238                        return; /* buffer full */
 239                } else{
 240                        in_pointer=0;
 241                }
 242        } else {
 243                if((in_pointer+1)==out_pointer)
 244                        return; /* buffer full */
 245                in_pointer++;
 246        }
 247        kbd_buffer[in_pointer]=data;
 248        return;
 249}
 250
 251/* test if a character is in the queue */
 252int kbd_testc(struct stdio_dev *dev)
 253{
 254        if(in_pointer==out_pointer)
 255                return(0); /* no data */
 256        else
 257                return(1);
 258}
 259/* gets the character from the queue */
 260int kbd_getc(struct stdio_dev *dev)
 261{
 262        char c;
 263        while(in_pointer==out_pointer);
 264        if((out_pointer+1)==KBD_BUFFER_LEN)
 265                out_pointer=0;
 266        else
 267                out_pointer++;
 268        c=kbd_buffer[out_pointer];
 269        return (int)c;
 270
 271}
 272
 273
 274/* set LEDs */
 275
 276void kbd_set_leds(void)
 277{
 278        if(caps_lock==0)
 279                leds&=~LED_CAP; /* switch caps_lock off */
 280        else
 281                leds|=LED_CAP; /* switch on LED */
 282        if(num_lock==0)
 283                leds&=~LED_NUM; /* switch LED off */
 284        else
 285                leds|=LED_NUM;  /* switch on LED */
 286        if(scroll_lock==0)
 287                leds&=~LED_SCR; /* switch LED off */
 288        else
 289                leds|=LED_SCR; /* switch on LED */
 290        kbd_send_data(KBD_CMD_SET_LEDS);
 291        kbd_send_data(leds);
 292}
 293
 294
 295void handle_keyboard_event (unsigned char scancode)
 296{
 297        unsigned char keycode;
 298
 299        /*  Convert scancode to keycode */
 300        PRINTF ("scancode %x\n", scancode);
 301        if (scancode == 0xe0) {
 302                e0 = 1;         /* special charakters */
 303                return;
 304        }
 305        if (e0 == 1) {
 306                e0 = 0;         /* delete flag */
 307                if (!(((scancode & 0x7F) == 0x38) ||    /* the right ctrl key */
 308                      ((scancode & 0x7F) == 0x1D) ||    /* the right alt key */
 309                      ((scancode & 0x7F) == 0x35) ||    /* the right '/' key */
 310                      ((scancode & 0x7F) == 0x1C)))
 311                        /* the right enter key */
 312                        /* we swallow unknown e0 codes */
 313                        return;
 314        }
 315        /* special cntrl keys */
 316        switch (scancode) {
 317        case 0x2A:
 318        case 0x36:              /* shift pressed */
 319                shift = 1;
 320                return;         /* do nothing else */
 321        case 0xAA:
 322        case 0xB6:              /* shift released */
 323                shift = 0;
 324                return;         /* do nothing else */
 325        case 0x38:              /* alt pressed */
 326                alt = 1;
 327                return;         /* do nothing else */
 328        case 0xB8:              /* alt released */
 329                alt = 0;
 330                return;         /* do nothing else */
 331        case 0x1d:              /* ctrl pressed */
 332                ctrl = 1;
 333                return;         /* do nothing else */
 334        case 0x9d:              /* ctrl released */
 335                ctrl = 0;
 336                return;         /* do nothing else */
 337        case 0x46:              /* scrollock pressed */
 338                scroll_lock = ~scroll_lock;
 339                kbd_set_leds ();
 340                return;         /* do nothing else */
 341        case 0x3A:              /* capslock pressed */
 342                caps_lock = ~caps_lock;
 343                kbd_set_leds ();
 344                return;
 345        case 0x45:              /* numlock pressed */
 346                num_lock = ~num_lock;
 347                kbd_set_leds ();
 348                return;
 349        case 0xC6:              /* scroll lock released */
 350        case 0xC5:              /* num lock released */
 351        case 0xBA:              /* caps lock released */
 352                return;         /* just swallow */
 353        }
 354        if ((scancode & 0x80) == 0x80)  /* key released */
 355                return;
 356        /* now, decide which table we need */
 357        if (scancode > (sizeof (kbd_plain_xlate) / sizeof (kbd_plain_xlate[0]))) {      /* scancode not in list */
 358                PRINTF ("unkown scancode %X\n", scancode);
 359                return;         /* swallow it */
 360        }
 361        /* setup plain code first */
 362        keycode = kbd_plain_xlate[scancode];
 363        if (caps_lock == 1) {   /* caps_lock is pressed, overwrite plain code */
 364                if (scancode > (sizeof (kbd_shift_xlate) / sizeof (kbd_shift_xlate[0]))) {      /* scancode not in list */
 365                        PRINTF ("unkown caps-locked scancode %X\n", scancode);
 366                        return; /* swallow it */
 367                }
 368                keycode = kbd_shift_xlate[scancode];
 369                if (keycode < 'A') {    /* we only want the alphas capital */
 370                        keycode = kbd_plain_xlate[scancode];
 371                }
 372        }
 373        if (shift == 1) {       /* shift overwrites caps_lock */
 374                if (scancode > (sizeof (kbd_shift_xlate) / sizeof (kbd_shift_xlate[0]))) {      /* scancode not in list */
 375                        PRINTF ("unkown shifted scancode %X\n", scancode);
 376                        return; /* swallow it */
 377                }
 378                keycode = kbd_shift_xlate[scancode];
 379        }
 380        if (ctrl == 1) {        /* ctrl overwrites caps_lock and shift */
 381                if (scancode > (sizeof (kbd_ctrl_xlate) / sizeof (kbd_ctrl_xlate[0]))) {        /* scancode not in list */
 382                        PRINTF ("unkown ctrl scancode %X\n", scancode);
 383                        return; /* swallow it */
 384                }
 385                keycode = kbd_ctrl_xlate[scancode];
 386        }
 387        /* check if valid keycode */
 388        if (keycode == 0xff) {
 389                PRINTF ("unkown scancode %X\n", scancode);
 390                return;         /* swallow unknown codes */
 391        }
 392
 393        kbd_put_queue (keycode);
 394        PRINTF ("%x\n", keycode);
 395}
 396
 397/*
 398 * This reads the keyboard status port, and does the
 399 * appropriate action.
 400 *
 401 */
 402unsigned char handle_kbd_event(void)
 403{
 404        unsigned char status = kbd_read_status();
 405        unsigned int work = 10000;
 406
 407        while ((--work > 0) && (status & KBD_STAT_OBF)) {
 408                unsigned char scancode;
 409
 410                scancode = kbd_read_input();
 411
 412                /* Error bytes must be ignored to make the
 413                   Synaptics touchpads compaq use work */
 414                /* Ignore error bytes */
 415                if (!(status & (KBD_STAT_GTO | KBD_STAT_PERR)))
 416                {
 417                        if (status & KBD_STAT_MOUSE_OBF)
 418                                ; /* not supported: handle_mouse_event(scancode); */
 419                        else
 420                                handle_keyboard_event(scancode);
 421                }
 422                status = kbd_read_status();
 423        }
 424        if (!work)
 425                PRINTF("pc_keyb: controller jammed (0x%02X).\n", status);
 426        return status;
 427}
 428
 429
 430/******************************************************************************
 431 * Lowlevel Part of keyboard section
 432 */
 433unsigned char kbd_read_status(void)
 434{
 435        return(in8(CONFIG_SYS_ISA_IO_BASE_ADDRESS + KDB_COMMAND_PORT));
 436}
 437
 438unsigned char kbd_read_input(void)
 439{
 440        return(in8(CONFIG_SYS_ISA_IO_BASE_ADDRESS + KDB_DATA_PORT));
 441}
 442
 443void kbd_write_command(unsigned char cmd)
 444{
 445        out8(CONFIG_SYS_ISA_IO_BASE_ADDRESS + KDB_COMMAND_PORT,cmd);
 446}
 447
 448void kbd_write_output(unsigned char data)
 449{
 450        out8(CONFIG_SYS_ISA_IO_BASE_ADDRESS + KDB_DATA_PORT, data);
 451}
 452
 453int kbd_read_data(void)
 454{
 455        int val;
 456        unsigned char status;
 457
 458        val = -1;
 459        status = kbd_read_status();
 460        if (status & KBD_STAT_OBF) {
 461                val = kbd_read_input();
 462                if (status & (KBD_STAT_GTO | KBD_STAT_PERR))
 463                        val = -2;
 464        }
 465        return val;
 466}
 467
 468int kbd_wait_for_input(void)
 469{
 470        unsigned long timeout;
 471        int val;
 472
 473        timeout = KBD_TIMEOUT;
 474        val=kbd_read_data();
 475        while(val < 0)
 476        {
 477                if(timeout--==0)
 478                        return -1;
 479                udelay(1000);
 480                val=kbd_read_data();
 481        }
 482        return val;
 483}
 484
 485
 486int kb_wait(void)
 487{
 488        unsigned long timeout = KBC_TIMEOUT * 10;
 489
 490        do {
 491                unsigned char status = handle_kbd_event();
 492                if (!(status & KBD_STAT_IBF))
 493                        return 0; /* ok */
 494                udelay(1000);
 495                timeout--;
 496        } while (timeout);
 497        return 1;
 498}
 499
 500void kbd_write_command_w(int data)
 501{
 502        if(kb_wait())
 503                PRINTF("timeout in kbd_write_command_w\n");
 504        kbd_write_command(data);
 505}
 506
 507void kbd_write_output_w(int data)
 508{
 509        if(kb_wait())
 510                PRINTF("timeout in kbd_write_output_w\n");
 511        kbd_write_output(data);
 512}
 513
 514void kbd_send_data(unsigned char data)
 515{
 516        unsigned char status;
 517        disable_8259A_irq(1); /* disable interrupt */
 518        kbd_write_output_w(data);
 519        status = kbd_wait_for_input();
 520        if (status == KBD_REPLY_ACK)
 521                enable_8259A_irq(1); /* enable interrupt */
 522}
 523
 524
 525char * kbd_initialize(void)
 526{
 527        int status;
 528
 529        in_pointer = 0; /* delete in Buffer */
 530        out_pointer = 0;
 531        /*
 532         * Test the keyboard interface.
 533         * This seems to be the only way to get it going.
 534         * If the test is successful a x55 is placed in the input buffer.
 535         */
 536        kbd_write_command_w(KBD_CCMD_SELF_TEST);
 537        if (kbd_wait_for_input() != 0x55)
 538                return "Kbd:   failed self test";
 539        /*
 540         * Perform a keyboard interface test.  This causes the controller
 541         * to test the keyboard clock and data lines.  The results of the
 542         * test are placed in the input buffer.
 543         */
 544        kbd_write_command_w(KBD_CCMD_KBD_TEST);
 545        if (kbd_wait_for_input() != 0x00)
 546                return "Kbd:   interface failed self test";
 547        /*
 548         * Enable the keyboard by allowing the keyboard clock to run.
 549         */
 550        kbd_write_command_w(KBD_CCMD_KBD_ENABLE);
 551        status = kbd_wait_for_input();
 552        /*
 553         * Reset keyboard. If the read times out
 554         * then the assumption is that no keyboard is
 555         * plugged into the machine.
 556         * This defaults the keyboard to scan-code set 2.
 557         *
 558         * Set up to try again if the keyboard asks for RESEND.
 559         */
 560        do {
 561                kbd_write_output_w(KBD_CMD_RESET);
 562                status = kbd_wait_for_input();
 563                if (status == KBD_REPLY_ACK)
 564                        break;
 565                if (status != KBD_REPLY_RESEND) {
 566                        PRINTF("status: %X\n",status);
 567                        return "Kbd:   reset failed, no ACK";
 568                }
 569        } while (1);
 570        if (kbd_wait_for_input() != KBD_REPLY_POR)
 571                return "Kbd:   reset failed, no POR";
 572
 573        /*
 574         * Set keyboard controller mode. During this, the keyboard should be
 575         * in the disabled state.
 576         *
 577         * Set up to try again if the keyboard asks for RESEND.
 578         */
 579        do {
 580                kbd_write_output_w(KBD_CMD_DISABLE);
 581                status = kbd_wait_for_input();
 582                if (status == KBD_REPLY_ACK)
 583                        break;
 584                if (status != KBD_REPLY_RESEND)
 585                        return "Kbd:   disable keyboard: no ACK";
 586        } while (1);
 587
 588        kbd_write_command_w(KBD_CCMD_WRITE_MODE);
 589        kbd_write_output_w(KBD_MODE_KBD_INT
 590                              | KBD_MODE_SYS
 591                              | KBD_MODE_DISABLE_MOUSE
 592                              | KBD_MODE_KCC);
 593
 594        /* AMCC powerpc portables need this to use scan-code set 1 -- Cort */
 595        kbd_write_command_w(KBD_CCMD_READ_MODE);
 596        if (!(kbd_wait_for_input() & KBD_MODE_KCC)) {
 597                /*
 598                 * If the controller does not support conversion,
 599                 * Set the keyboard to scan-code set 1.
 600                 */
 601                kbd_write_output_w(0xF0);
 602                kbd_wait_for_input();
 603                kbd_write_output_w(0x01);
 604                kbd_wait_for_input();
 605        }
 606        kbd_write_output_w(KBD_CMD_ENABLE);
 607        if (kbd_wait_for_input() != KBD_REPLY_ACK)
 608                return "Kbd:   enable keyboard: no ACK";
 609
 610        /*
 611         * Finally, set the typematic rate to maximum.
 612         */
 613        kbd_write_output_w(KBD_CMD_SET_RATE);
 614        if (kbd_wait_for_input() != KBD_REPLY_ACK)
 615                return "Kbd:   Set rate: no ACK";
 616        kbd_write_output_w(0x00);
 617        if (kbd_wait_for_input() != KBD_REPLY_ACK)
 618                return "Kbd:   Set rate: no ACK";
 619        return NULL;
 620}
 621
 622void kbd_interrupt(void)
 623{
 624        handle_kbd_event();
 625}
 626