src/char.c

   1 /*
   2  * <char.c>
   3  *
   4  * Open Hack'Ware BIOS character devices drivers.
   5  *
   6  *  Copyright (c) 2004-2005 Jocelyn Mayer
   7  *
   8  *  cuda driver: Copyright (c) 2004-2005 Fabrice Bellard
   9  *
  10  *   This program is free software; you can redistribute it and/or
  11  *   modify it under the terms of the GNU General Public License V2
  12  *   as published by the Free Software Foundation
  13  *
  14  *   This program is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *   GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with this program; if not, write to the Free Software
  21  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23
  24 #include <stdlib.h>
  25 #include <stdio.h>
  26 #include "bios.h"
  27 #include "adb.h"
  28
  29 //#define DEBUG_CHARDEV
  30 //#define DEBUG_CUDA
  31 //#define DEBUG_ADB
  32
  33 #ifdef DEBUG_CHARDEV
  34 #define CHARDEV_DPRINTF(fmt, args...) \
  35 do { dprintf("CHARDEV - %s: " fmt, __func__ , ##args); } while (0)
  36 #else
  37 #define CHARDEV_DPRINTF(fmt, args...) do { } while (0)
  38 #endif
  39
  40 /* Generic character device API */
  41 struct chardev_t {
  42     chardev_t *next;
  43     int type;
  44     cops_t *ops;
  45     void *private;
  46 };
  47
  48 static chardev_t *char_devices;
  49
  50 int chardev_register (int type, cops_t *ops, void *private)
  51 {
  52     chardev_t *dev, **cur;
  53
  54     CHARDEV_DPRINTF("Register char device of type %d\n", type);
  55     if (type > CHARDEV_LAST)
  56         return -1;
  57     dev = malloc(sizeof(chardev_t));
  58     if (dev == NULL)
  59         return -1;
  60     dev->type = type;
  61     dev->ops = ops;
  62     dev->private = private;
  63     for (cur = &char_devices; *cur != NULL; cur = &((*cur)->next))
  64         continue;
  65     *cur = dev;
  66
  67     return 0;
  68 }
  69
  70 int chardev_open (chardev_t *dev)
  71 {
  72     if (dev->ops == NULL)
  73         return -1;
  74     if (dev->ops->open == NULL)
  75         return 0;
  76
  77     return (*dev->ops->open)(dev->private);
  78 }
  79
  80 int chardev_close (chardev_t *dev)
  81 {
  82     if (dev->ops == NULL)
  83         return -1;
  84     if (dev->ops->close == NULL)
  85         return 0;
  86
  87     return (*dev->ops->close)(dev->private);
  88 }
  89
  90 int chardev_read (chardev_t *dev, void *buffer, int maxlen)
  91 {
  92     unsigned char *p;
  93     int len;
  94     int c;
  95
  96     if (dev->ops == NULL || dev->ops->read == NULL)
  97         return -1;
  98
  99     p = buffer;
 100     for (len = 0; len < maxlen; len++) {
 101         c = (*dev->ops->read)(dev->private);
 102         if (c < 0)
 103             break;
 104         *p++ = c;
 105     }
 106
 107     return len;
 108 }
 109
 110 int chardev_write (chardev_t *dev, const void *buffer, int maxlen)
 111 {
 112     const unsigned char *p;
 113     int len;
 114     int c;
 115
 116     if (dev->ops == NULL || dev->ops->write == NULL)
 117         return -1;
 118
 119     p = buffer;
 120     for (len = 0; len < maxlen; len++) {
 121         c = *p++;
 122         if ((*dev->ops->write)(dev->private, c) < 0)
 123             break;
 124     }
 125
 126     return len;
 127 }
 128
 129 int chardev_type (chardev_t *dev)
 130 {
 131     return dev->type;
 132 }
 133
 134 /* Console driver */
 135 static chardev_t *console_in_devs[17], *console_out_devs[17];
 136 static int console_last_in;
 137
 138 int console_open (void)
 139 {
 140     chardev_t *cur;
 141     int i, j, n, register_outd;
 142
 143     i = 0;
 144     j = 0;
 145     n = 0;
 146     /* Check all character devices and register those which are usable
 147      * as IO for the console
 148      */
 149     CHARDEV_DPRINTF("enter\n");
 150     for (cur = char_devices; cur != NULL; cur = cur->next, n++) {
 151         register_outd = 0;
 152         switch (cur->type) {
 153         case  CHARDEV_SERIAL:
 154             CHARDEV_DPRINTF("one serial port\n");
 155             register_outd = 1;
 156             /* No break here */
 157         case CHARDEV_KBD:
 158             CHARDEV_DPRINTF("one input port %d %d\n", n, i);
 159             if (i < 16 && chardev_open(cur) == 0) {
 160                 console_in_devs[i++] = cur;
 161             }
 162             if (!register_outd)
 163                 break;
 164             /* No break here */
 165         case CHARDEV_DISPLAY:
 166             CHARDEV_DPRINTF("one output port %d %d\n", n, j);
 167             if (j < 16 && chardev_open(cur) == 0) {
 168                 console_out_devs[j++] = cur;
 169             }
 170             break;
 171         default:
 172             CHARDEV_DPRINTF("Skip device %d\n", n);
 173             break;
 174         }
 175     }
 176
 177     return 0;
 178 }
 179
 180 int console_read (void *buffer, int maxlen)
 181 {
 182     chardev_t *cur;
 183     int i, in;
 184
 185     CHARDEV_DPRINTF("enter\n");
 186     /* Get data from the first in device responding to us */
 187     cur = console_in_devs[console_last_in];
 188     for (i = console_last_in;;) {
 189         CHARDEV_DPRINTF("read from device %d\n", i);
 190         in = chardev_read(cur, buffer, maxlen);
 191         if (in > 0) {
 192             console_last_in = i;
 193 #if 0
 194             printf("Read %d chars '%c'...\n", in, *((char *)buffer));
 195 #endif
 196             return in;
 197         }
 198         cur = console_in_devs[++i];
 199         if (cur == NULL) {
 200             i = 0;
 201             cur = console_in_devs[0];
 202         }
 203         if (i == console_last_in || cur == NULL)
 204             break;
 205     }
 206     console_last_in = i;
 207     CHARDEV_DPRINTF("out\n");
 208
 209     return 0;
 210 }
 211
 212 int console_write (const void *buffer, int len)
 213 {
 214     chardev_t *cur;
 215     int i, out, max;
 216
 217     /* Write data to all devices */
 218     max = 0;
 219     for (i = 0; i < 16; i++) {
 220         cur = console_out_devs[i];
 221         if (cur == NULL)
 222             break;
 223         out = chardev_write(cur, buffer, len);
 224         if (out > max)
 225             max = out;
 226     }
 227
 228     return max;
 229 }
 230
 231 void console_close (void)
 232 {
 233     chardev_t *cur;
 234     int i;
 235
 236     for (i = 0; i < 16; i++) {
 237         cur = console_out_devs[i];
 238         if (cur == NULL)
 239             break;
 240         chardev_close(cur);
 241         console_out_devs[i] = NULL;
 242     }
 243 }
 244
 245 /* PC serial port "driver" */
 246 #define PC_SERIAL_LSR_OFFSET (5)
 247 typedef struct pc_serial_t {
 248     uint16_t base;
 249 } pc_serial_t;
 250
 251 static int pc_serial_open (unused void *private)
 252 {
 253     return 0;
 254 }
 255
 256 static int pc_serial_writeb (void *private, int data)
 257 {
 258     pc_serial_t *serial = private;
 259
 260     /* Wait for the FIFO to be ready to accept more chars.
 261      * Note: this is completely buggy and would never work on real hardware,
 262      *       as the serial port (especialy the FIFO) has not been programmed
 263      *       anywhere before !
 264      */
 265     if (!(inb(serial->base + PC_SERIAL_LSR_OFFSET) & 0x20))
 266         usleep(100);
 267     outb(serial->base, data);
 268
 269     return 0;
 270 }
 271
 272 static int pc_serial_readb (void *private)
 273 {
 274     pc_serial_t *serial = private;
 275
 276     if (!(inb(serial->base + PC_SERIAL_LSR_OFFSET) & 0x01))
 277         return -1;
 278
 279     return inb(serial->base);
 280 }
 281
 282 static int pc_serial_close (unused void *private)
 283 {
 284     return 0;
 285 }
 286
 287 static cops_t pc_serial_ops = {
 288     .open = &pc_serial_open,
 289     .read = &pc_serial_readb,
 290     .write = &pc_serial_writeb,
 291     .close = &pc_serial_close,
 292 };
 293
 294 /* XXX: debug stuff only ! (TOFIX with a generic debug console) */
 295 int serial_write (const void *buffer, int len)
 296 {
 297     const char *p;
 298
 299     for (p = buffer; len > 0; len--) {
 300         if (!(inb(0x3F8 + PC_SERIAL_LSR_OFFSET) & 0x20))
 301             usleep(100);
 302         outb(0x3F8, *p++);
 303     }
 304
 305     return 0;
 306 }
 307
 308 int pc_serial_register (uint16_t base)
 309 {
 310     pc_serial_t *serial;
 311
 312     serial = malloc(sizeof(pc_serial_t));
 313     if (serial == NULL)
 314         return -1;
 315     serial->base = base;
 316     /* XXX: TODO: initialize the serial port (FIFO, speed, ...) */
 317
 318     return chardev_register(CHARDEV_SERIAL, &pc_serial_ops, serial);
 319 }
 320
 321 /* VGA console device */
 322 static int vga_cons_open (unused void *private)
 323 {
 324     return 0;
 325 }
 326
 327 static int vga_cons_writeb (unused void *private, int data)
 328 {
 329     vga_putchar(data);
 330
 331     return 0;
 332 }
 333
 334 static int vga_cons_close (unused void *private)
 335 {
 336     return 0;
 337 }
 338
 339 static cops_t vga_cons_ops = {
 340     .open = &vga_cons_open,
 341     .read = NULL,
 342     .write = &vga_cons_writeb,
 343     .close = &vga_cons_close,
 344 };
 345
 346 int vga_console_register (void)
 347 {
 348     return chardev_register(CHARDEV_DISPLAY, &vga_cons_ops, NULL);
 349 }
 350
 351 /* Macintosh via-cuda driver */
 352 #ifdef DEBUG_CUDA
 353 #define CUDA_DPRINTF(fmt, args...) \
 354 do { dprintf("CUDA - %s: " fmt, __func__ , ##args); } while (0)
 355 #else
 356 #define CUDA_DPRINTF(fmt, args...) do { } while (0)
 357 #endif
 358
 359 /* VIA registers - spaced 0x200 bytes apart */
 360 #define RS              0x200           /* skip between registers */
 361 #define B               0               /* B-side data */
 362 #define A               RS              /* A-side data */
 363 #define DIRB            (2*RS)          /* B-side direction (1=output) */
 364 #define DIRA            (3*RS)          /* A-side direction (1=output) */
 365 #define T1CL            (4*RS)          /* Timer 1 ctr/latch (low 8 bits) */
 366 #define T1CH            (5*RS)          /* Timer 1 counter (high 8 bits) */
 367 #define T1LL            (6*RS)          /* Timer 1 latch (low 8 bits) */
 368 #define T1LH            (7*RS)          /* Timer 1 latch (high 8 bits) */
 369 #define T2CL            (8*RS)          /* Timer 2 ctr/latch (low 8 bits) */
 370 #define T2CH            (9*RS)          /* Timer 2 counter (high 8 bits) */
 371 #define SR              (10*RS)         /* Shift register */
 372 #define ACR             (11*RS)         /* Auxiliary control register */
 373 #define PCR             (12*RS)         /* Peripheral control register */
 374 #define IFR             (13*RS)         /* Interrupt flag register */
 375 #define IER             (14*RS)         /* Interrupt enable register */
 376 #define ANH             (15*RS)         /* A-side data, no handshake */
 377
 378 /* Bits in B data register: all active low */
 379 #define TREQ            0x08            /* Transfer request (input) */
 380 #define TACK            0x10            /* Transfer acknowledge (output) */
 381 #define TIP             0x20            /* Transfer in progress (output) */
 382
 383 /* Bits in ACR */
 384 #define SR_CTRL         0x1c            /* Shift register control bits */
 385 #define SR_EXT          0x0c            /* Shift on external clock */
 386 #define SR_OUT          0x10            /* Shift out if 1 */
 387
 388 /* Bits in IFR and IER */
 389 #define IER_SET         0x80            /* set bits in IER */
 390 #define IER_CLR         0               /* clear bits in IER */
 391 #define SR_INT          0x04            /* Shift register full/empty */
 392
 393 #define CUDA_BUF_SIZE 16
 394
 395 #define ADB_PACKET      0
 396 #define CUDA_PACKET     1
 397
 398 struct cuda_t {
 399     uint32_t base;
 400     adb_bus_t *adb_bus;
 401 };
 402
 403 static uint8_t cuda_readb (cuda_t *dev, int reg)
 404 {
 405     return *(volatile uint8_t *)(dev->base + reg);
 406 }
 407
 408 static void cuda_writeb (cuda_t *dev, int reg, uint8_t val)
 409 {
 410     *(volatile uint8_t *)(dev->base + reg) = val;
 411 }
 412
 413 static void cuda_wait_irq (cuda_t *dev)
 414 {
 415     int val;
 416
 417     CUDA_DPRINTF("\n");
 418     for(;;) {
 419         val = cuda_readb(dev, IFR);
 420         cuda_writeb(dev, IFR, val & 0x7f);
 421         if (val & SR_INT)
 422             break;
 423     }
 424 }
 425
 426 static int cuda_request (cuda_t *dev, uint8_t pkt_type, const uint8_t *buf,
 427                          int buf_len, uint8_t *obuf)
 428 {
 429     int i, obuf_len, val;
 430
 431     cuda_writeb(dev, ACR, cuda_readb(dev, ACR) | SR_OUT);
 432     cuda_writeb(dev, SR, pkt_type);
 433     cuda_writeb(dev, B, cuda_readb(dev, B) & ~TIP);
 434     if (buf) {
 435         CUDA_DPRINTF("Send buf len: %d\n", buf_len);
 436         /* send 'buf' */
 437         for(i = 0; i < buf_len; i++) {
 438             cuda_wait_irq(dev);
 439             cuda_writeb(dev, SR, buf[i]);
 440             cuda_writeb(dev, B, cuda_readb(dev, B) ^ TACK);
 441         }
 442     }
 443     cuda_wait_irq(dev);
 444     cuda_writeb(dev, ACR, cuda_readb(dev, ACR) & ~SR_OUT);
 445     cuda_readb(dev, SR);
 446     cuda_writeb(dev, B, cuda_readb(dev, B) | TIP | TACK);
 447
 448     obuf_len = 0;
 449     if (obuf) {
 450         cuda_wait_irq(dev);
 451         cuda_readb(dev, SR);
 452         cuda_writeb(dev, B, cuda_readb(dev, B) & ~TIP);
 453         for(;;) {
 454             cuda_wait_irq(dev);
 455             val = cuda_readb(dev, SR);
 456             if (obuf_len < CUDA_BUF_SIZE)
 457                 obuf[obuf_len++] = val;
 458             if (cuda_readb(dev, B) & TREQ)
 459                 break;
 460             cuda_writeb(dev, B, cuda_readb(dev, B) ^ TACK);
 461         }
 462         cuda_writeb(dev, B, cuda_readb(dev, B) | TIP | TACK);
 463
 464         cuda_wait_irq(dev);
 465         cuda_readb(dev, SR);
 466     }
 467     CUDA_DPRINTF("Got len: %d\n", obuf_len);
 468
 469     return obuf_len;
 470 }
 471
 472 #if 0
 473 void cuda_test(void)
 474 {
 475     int keycode;
 476     printf("cuda test:\n");
 477     cuda_init(0x80400000 + 0x16000);
 478     for(;;) {
 479         keycode = adb_read_key();
 480         if (keycode >= 0)
 481             printf("keycode=%x\n", keycode);
 482     }
 483 }
 484 #endif
 485
 486 /* Cuda ADB glue */
 487 static int cuda_adb_req (void *host, const uint8_t *snd_buf, int len,
 488                          uint8_t *rcv_buf)
 489 {
 490     uint8_t buffer[CUDA_BUF_SIZE], *pos;
 491
 492     CUDA_DPRINTF("len: %d %02x\n", len, snd_buf[0]);
 493     len = cuda_request(host, ADB_PACKET, snd_buf, len, buffer);
 494     if (len > 1 && buffer[0] == ADB_PACKET) {
 495         pos = buffer + 2;
 496         len -= 2;
 497     } else {
 498         pos = buffer + 1;
 499         len = -1;
 500     }
 501     memcpy(rcv_buf, pos, len);
 502
 503     return len;
 504 }
 505
 506 cuda_t *cuda_init (uint32_t base)
 507 {
 508     cuda_t *cuda;
 509
 510     CUDA_DPRINTF(" base=%08x\n", base);
 511     cuda = malloc(sizeof(cuda_t));
 512     if (cuda == NULL)
 513         return NULL;
 514     cuda->base = base;
 515     cuda_writeb(cuda, B, cuda_readb(cuda, B) | TREQ | TIP);
 516 #if 0
 517     {
 518         int len;
 519
 520         /* enable auto poll */
 521         buf[0] = 0x01;
 522         buf[1] = 1;
 523         len = cuda_request(cuda, CUDA_PACKET, buf, 2, obuf);
 524         if (len != 2 || obuf[0] != CUDA_PACKET || obuf[1] != 1) {
 525             printf("cuda: invalid reply for auto poll request");
 526             free(cuda);
 527             return NULL;
 528         }
 529     }
 530 #endif
 531     cuda->adb_bus = adb_bus_new(cuda, &cuda_adb_req);
 532     if (cuda->adb_bus == NULL) {
 533         free(cuda);
 534         return NULL;
 535     }
 536     adb_bus_init(cuda->adb_bus);
 537
 538     return cuda;
 539 }
 540
 541 void cuda_reset (cuda_t *cuda)
 542 {
 543     adb_bus_reset(cuda->adb_bus);
 544 }
 545
 546 /* ADB generic driver */
 547 #ifdef DEBUG_ADB
 548 #define ADB_DPRINTF(fmt, args...) \
 549 do { dprintf("ADB - %s: " fmt, __func__ , ##args); } while (0)
 550 #else
 551 #define ADB_DPRINTF(fmt, args...) do { } while (0)
 552 #endif
 553
 554 int adb_cmd (adb_dev_t *dev, uint8_t cmd, uint8_t reg,
 555              uint8_t *buf, int len)
 556 {
 557     uint8_t adb_send[ADB_BUF_SIZE], adb_rcv[ADB_BUF_SIZE];
 558
 559     ADB_DPRINTF("cmd: %d reg: %d len: %d\n", cmd, reg, len);
 560     if (dev->bus == NULL || dev->bus->req == NULL) {
 561         ADB_DPRINTF("ERROR: invalid bus !\n");
 562         bug();
 563     }
 564     /* Sanity checks */
 565     if (cmd != ADB_LISTEN && len != 0) {
 566         /* No buffer transmitted but for LISTEN command */
 567         ADB_DPRINTF("in buffer for cmd %d\n", cmd);
 568         return -1;
 569     }
 570     if (cmd == ADB_LISTEN && ((len < 2 || len > 8) || buf == NULL)) {
 571         /* Need a buffer with a regular register size for LISTEN command */
 572         ADB_DPRINTF("no/invalid buffer for ADB_LISTEN (%d)\n", len);
 573         return -1;
 574     }
 575     if ((cmd == ADB_TALK || cmd == ADB_LISTEN) && reg > 3) {
 576         /* Need a valid register number for LISTEN and TALK commands */
 577         ADB_DPRINTF("invalid reg for TALK/LISTEN command (%d %d)\n", cmd, reg);
 578         return -1;
 579     }
 580     switch (cmd) {
 581     case ADB_SEND_RESET:
 582         adb_send[0] = ADB_SEND_RESET;
 583         break;
 584     case ADB_FLUSH:
 585         adb_send[0] = (dev->addr << 4) | ADB_FLUSH;
 586         break;
 587     case ADB_LISTEN:
 588         memcpy(adb_send + 1, buf, len);
 589         /* No break here */
 590     case ADB_TALK:
 591         adb_send[0] = (dev->addr << 4) | cmd | reg;
 592         break;
 593     }
 594     memset(adb_rcv, 0, ADB_BUF_SIZE);
 595     len = (*dev->bus->req)(dev->bus->host, adb_send, len + 1, adb_rcv);
 596 #ifdef DEBUG_ADB
 597     printf("%x %x %x %x\n", adb_rcv[0], adb_rcv[1], adb_rcv[2], adb_rcv[3]);
 598 #endif
 599     switch (len) {
 600     case 0:
 601         /* No data */
 602         break;
 603     case 2 ... 8:
 604         /* Register transmitted */
 605         if (buf != NULL)
 606             memcpy(buf, adb_rcv, len);
 607         break;
 608     default:
 609         /* Should never happen */
 610         ADB_DPRINTF("Cmd %d returned %d bytes !\n", cmd, len);
 611         return -1;
 612     }
 613     ADB_DPRINTF("retlen: %d\n", len);
 614
 615     return len;
 616 }
 617
 618 void adb_bus_reset (adb_bus_t *bus)
 619 {
 620     adb_reset(bus);
 621 }
 622
 623 adb_bus_t *adb_bus_new (void *host,
 624                         int (*req)(void *host, const uint8_t *snd_buf,
 625                                    int len, uint8_t *rcv_buf))
 626 {
 627     adb_bus_t *new;
 628
 629     new = malloc(sizeof(adb_bus_t));
 630     if (new == NULL)
 631         return NULL;
 632     new->host = host;
 633     new->req = req;
 634
 635     return new;
 636 }
 637
 638 /* ADB */
 639 void *adb_kbd_new (void *private);
 640
 641 static int adb_mouse_open (void *private);
 642 static int adb_mouse_close (void *private);
 643 static int adb_mouse_read (void *private);
 644
 645 static cops_t adb_mouse_ops = {
 646     &adb_mouse_open,
 647     &adb_mouse_close,
 648     &adb_mouse_read,
 649     NULL,
 650 };
 651
 652 /* Check and relocate all ADB devices as suggested in
 653  * ADB_manager Apple documentation
 654  */
 655 int adb_bus_init (adb_bus_t *bus)
 656 {
 657     uint8_t buffer[ADB_BUF_SIZE];
 658     uint8_t adb_addresses[16] =
 659         { 8, 9, 10, 11, 12, 13, 14, -1, -1, -1, -1, -1, -1, -1, 0, };
 660     adb_dev_t tmp_device, **cur;
 661     int address;
 662     int reloc = 0, next_free = 7;
 663     int keep;
 664
 665     /* Reset the bus */
 666     ADB_DPRINTF("\n");
 667     adb_reset(bus);
 668     cur = &bus->devices;
 669     memset(&tmp_device, 0, sizeof(adb_dev_t));
 670     tmp_device.bus = bus;
 671     for (address = 1; address < 8 && adb_addresses[reloc] > 0;) {
 672         if (address == ADB_RES) {
 673             /* Reserved */
 674             address++;
 675             continue;
 676         }
 677         ADB_DPRINTF("Check device on ADB address %d\n", address);
 678         tmp_device.addr = address;
 679         switch (adb_reg_get(&tmp_device, 3, buffer)) {
 680         case 0:
 681             ADB_DPRINTF("No device on ADB address %d\n", address);
 682             /* Register this address as free */
 683             if (adb_addresses[next_free] != 0)
 684                 adb_addresses[next_free++] = address;
 685             /* Check next ADB address */
 686             address++;
 687             break;
 688         case 2:
 689             /* One device answered :
 690              * make it available and relocate it to a free address
 691              */
 692             if (buffer[0] == ADB_CHADDR) {
 693                 /* device self test failed */
 694                 ADB_DPRINTF("device on ADB address %d self-test failed "
 695                             "%02x %02x %02x\n", address,
 696                             buffer[0], buffer[1], buffer[2]);
 697                 keep = 0;
 698             } else {
 699                 ADB_DPRINTF("device on ADB address %d self-test OK\n",
 700                             address);
 701                 keep = 1;
 702             }
 703             ADB_DPRINTF("Relocate device on ADB address %d to %d (%d)\n",
 704                         address, adb_addresses[reloc], reloc);
 705             buffer[0] = ((buffer[0] & 0x40) & ~0x90) | adb_addresses[reloc];
 706             if (keep == 1)
 707                 buffer[0] |= 0x20;
 708             buffer[1] = ADB_CHADDR_NOCOLL;
 709             if (adb_reg_set(&tmp_device, 3, buffer, 2) < 0) {
 710                 ADB_DPRINTF("ADB device relocation failed\n");
 711                 return -1;
 712             }
 713             if (keep == 1) {
 714                 *cur = malloc(sizeof(adb_dev_t));
 715                 if (*cur == NULL) {
 716                     return -1;
 717                 }
 718                 (*cur)->type = address;
 719                 (*cur)->bus = bus;
 720                 (*cur)->addr = adb_addresses[reloc++];
 721                 /* Flush buffers */
 722                 adb_flush(*cur);
 723                 switch ((*cur)->type) {
 724                 case ADB_PROTECT:
 725                     ADB_DPRINTF("Found one protected device\n");
 726                     break;
 727                 case ADB_KEYBD:
 728                     ADB_DPRINTF("Found one keyboard\n");
 729                     adb_kbd_new(*cur);
 730                     break;
 731                 case ADB_MOUSE:
 732                     ADB_DPRINTF("Found one mouse\n");
 733                     chardev_register(CHARDEV_MOUSE, &adb_mouse_ops, *cur);
 734                     break;
 735                 case ADB_ABS:
 736                     ADB_DPRINTF("Found one absolute positioning device\n");
 737                     break;
 738                 case ADB_MODEM:
 739                     ADB_DPRINTF("Found one modem\n");
 740                     break;
 741                 case ADB_RES:
 742                     ADB_DPRINTF("Found one ADB res device\n");
 743                     break;
 744                 case ADB_MISC:
 745                     ADB_DPRINTF("Found one ADB misc device\n");
 746                     break;
 747                 }
 748                 cur = &((*cur)->next);
 749             }
 750             break;
 751         case 1:
 752         case 3 ... 7:
 753             /* SHOULD NOT HAPPEN : register 3 is always two bytes long */
 754             ADB_DPRINTF("Invalid returned len for ADB register 3\n");
 755             return -1;
 756         case -1:
 757             /* ADB ERROR */
 758             ADB_DPRINTF("error gettting ADB register 3\n");
 759             return -1;
 760         }
 761     }
 762
 763     return 0;
 764 }
 765
 766 /* ADB mouse chardev interface (TODO) */
 767 static int adb_mouse_open (unused void *private)
 768 {
 769     return 0;
 770 }
 771
 772 static int adb_mouse_close (unused void *private)
 773 {
 774     return 0;
 775 }
 776
 777 static int adb_mouse_read (unused void *private)
 778 {
 779     return -1;
 780 }