arch/m68k/mac/misc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Miscellaneous Mac68K-specific stuff
   4  */
   5
   6 #include <linux/types.h>
   7 #include <linux/errno.h>
   8 #include <linux/kernel.h>
   9 #include <linux/delay.h>
  10 #include <linux/sched.h>
  11 #include <linux/time.h>
  12 #include <linux/rtc.h>
  13 #include <linux/mm.h>
  14
  15 #include <linux/adb.h>
  16 #include <linux/cuda.h>
  17 #include <linux/pmu.h>
  18
  19 #include <linux/uaccess.h>
  20 #include <asm/io.h>
  21 #include <asm/segment.h>
  22 #include <asm/setup.h>
  23 #include <asm/macintosh.h>
  24 #include <asm/mac_via.h>
  25 #include <asm/mac_oss.h>
  26
  27 #include <asm/machdep.h>
  28
  29 /* Offset between Unix time (1970-based) and Mac time (1904-based) */
  30
  31 #define RTC_OFFSET 2082844800
  32
  33 static void (*rom_reset)(void);
  34
  35 #ifdef CONFIG_ADB_CUDA
  36 static long cuda_read_time(void)
  37 {
  38         struct adb_request req;
  39         long time;
  40
  41         if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME) < 0)
  42                 return 0;
  43         while (!req.complete)
  44                 cuda_poll();
  45
  46         time = (req.reply[3] << 24) | (req.reply[4] << 16) |
  47                (req.reply[5] << 8) | req.reply[6];
  48         return time - RTC_OFFSET;
  49 }
  50
  51 static void cuda_write_time(long data)
  52 {
  53         struct adb_request req;
  54
  55         data += RTC_OFFSET;
  56         if (cuda_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME,
  57                          (data >> 24) & 0xFF, (data >> 16) & 0xFF,
  58                          (data >> 8) & 0xFF, data & 0xFF) < 0)
  59                 return;
  60         while (!req.complete)
  61                 cuda_poll();
  62 }
  63
  64 static __u8 cuda_read_pram(int offset)
  65 {
  66         struct adb_request req;
  67
  68         if (cuda_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
  69                          (offset >> 8) & 0xFF, offset & 0xFF) < 0)
  70                 return 0;
  71         while (!req.complete)
  72                 cuda_poll();
  73         return req.reply[3];
  74 }
  75
  76 static void cuda_write_pram(int offset, __u8 data)
  77 {
  78         struct adb_request req;
  79
  80         if (cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
  81                          (offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
  82                 return;
  83         while (!req.complete)
  84                 cuda_poll();
  85 }
  86 #endif /* CONFIG_ADB_CUDA */
  87
  88 #ifdef CONFIG_ADB_PMU68K
  89 static long pmu_read_time(void)
  90 {
  91         struct adb_request req;
  92         long time;
  93
  94         if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
  95                 return 0;
  96         while (!req.complete)
  97                 pmu_poll();
  98
  99         time = (req.reply[1] << 24) | (req.reply[2] << 16) |
 100                (req.reply[3] << 8) | req.reply[4];
 101         return time - RTC_OFFSET;
 102 }
 103
 104 static void pmu_write_time(long data)
 105 {
 106         struct adb_request req;
 107
 108         data += RTC_OFFSET;
 109         if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
 110                         (data >> 24) & 0xFF, (data >> 16) & 0xFF,
 111                         (data >> 8) & 0xFF, data & 0xFF) < 0)
 112                 return;
 113         while (!req.complete)
 114                 pmu_poll();
 115 }
 116
 117 static __u8 pmu_read_pram(int offset)
 118 {
 119         struct adb_request req;
 120
 121         if (pmu_request(&req, NULL, 3, PMU_READ_NVRAM,
 122                         (offset >> 8) & 0xFF, offset & 0xFF) < 0)
 123                 return 0;
 124         while (!req.complete)
 125                 pmu_poll();
 126         return req.reply[3];
 127 }
 128
 129 static void pmu_write_pram(int offset, __u8 data)
 130 {
 131         struct adb_request req;
 132
 133         if (pmu_request(&req, NULL, 4, PMU_WRITE_NVRAM,
 134                         (offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
 135                 return;
 136         while (!req.complete)
 137                 pmu_poll();
 138 }
 139 #endif /* CONFIG_ADB_PMU68K */
 140
 141 /*
 142  * VIA PRAM/RTC access routines
 143  *
 144  * Must be called with interrupts disabled and
 145  * the RTC should be enabled.
 146  */
 147
 148 static __u8 via_pram_readbyte(void)
 149 {
 150         int i, reg;
 151         __u8 data;
 152
 153         reg = via1[vBufB] & ~VIA1B_vRTCClk;
 154
 155         /* Set the RTC data line to be an input. */
 156
 157         via1[vDirB] &= ~VIA1B_vRTCData;
 158
 159         /* The bits of the byte come out in MSB order */
 160
 161         data = 0;
 162         for (i = 0 ; i < 8 ; i++) {
 163                 via1[vBufB] = reg;
 164                 via1[vBufB] = reg | VIA1B_vRTCClk;
 165                 data = (data << 1) | (via1[vBufB] & VIA1B_vRTCData);
 166         }
 167
 168         /* Return RTC data line to output state */
 169
 170         via1[vDirB] |= VIA1B_vRTCData;
 171
 172         return data;
 173 }
 174
 175 static void via_pram_writebyte(__u8 data)
 176 {
 177         int i, reg, bit;
 178
 179         reg = via1[vBufB] & ~(VIA1B_vRTCClk | VIA1B_vRTCData);
 180
 181         /* The bits of the byte go in in MSB order */
 182
 183         for (i = 0 ; i < 8 ; i++) {
 184                 bit = data & 0x80? 1 : 0;
 185                 data <<= 1;
 186                 via1[vBufB] = reg | bit;
 187                 via1[vBufB] = reg | bit | VIA1B_vRTCClk;
 188         }
 189 }
 190
 191 /*
 192  * Execute a VIA PRAM/RTC command. For read commands
 193  * data should point to a one-byte buffer for the
 194  * resulting data. For write commands it should point
 195  * to the data byte to for the command.
 196  *
 197  * This function disables all interrupts while running.
 198  */
 199
 200 static void via_pram_command(int command, __u8 *data)
 201 {
 202         unsigned long flags;
 203         int is_read;
 204
 205         local_irq_save(flags);
 206
 207         /* Enable the RTC and make sure the strobe line is high */
 208
 209         via1[vBufB] = (via1[vBufB] | VIA1B_vRTCClk) & ~VIA1B_vRTCEnb;
 210
 211         if (command & 0xFF00) {         /* extended (two-byte) command */
 212                 via_pram_writebyte((command & 0xFF00) >> 8);
 213                 via_pram_writebyte(command & 0xFF);
 214                 is_read = command & 0x8000;
 215         } else {                        /* one-byte command */
 216                 via_pram_writebyte(command);
 217                 is_read = command & 0x80;
 218         }
 219         if (is_read) {
 220                 *data = via_pram_readbyte();
 221         } else {
 222                 via_pram_writebyte(*data);
 223         }
 224
 225         /* All done, disable the RTC */
 226
 227         via1[vBufB] |= VIA1B_vRTCEnb;
 228
 229         local_irq_restore(flags);
 230 }
 231
 232 static __u8 via_read_pram(int offset)
 233 {
 234         return 0;
 235 }
 236
 237 static void via_write_pram(int offset, __u8 data)
 238 {
 239 }
 240
 241 /*
 242  * Return the current time in seconds since January 1, 1904.
 243  *
 244  * This only works on machines with the VIA-based PRAM/RTC, which
 245  * is basically any machine with Mac II-style ADB.
 246  */
 247
 248 static long via_read_time(void)
 249 {
 250         union {
 251                 __u8 cdata[4];
 252                 long idata;
 253         } result, last_result;
 254         int count = 1;
 255
 256         via_pram_command(0x81, &last_result.cdata[3]);
 257         via_pram_command(0x85, &last_result.cdata[2]);
 258         via_pram_command(0x89, &last_result.cdata[1]);
 259         via_pram_command(0x8D, &last_result.cdata[0]);
 260
 261         /*
 262          * The NetBSD guys say to loop until you get the same reading
 263          * twice in a row.
 264          */
 265
 266         while (1) {
 267                 via_pram_command(0x81, &result.cdata[3]);
 268                 via_pram_command(0x85, &result.cdata[2]);
 269                 via_pram_command(0x89, &result.cdata[1]);
 270                 via_pram_command(0x8D, &result.cdata[0]);
 271
 272                 if (result.idata == last_result.idata)
 273                         return result.idata - RTC_OFFSET;
 274
 275                 if (++count > 10)
 276                         break;
 277
 278                 last_result.idata = result.idata;
 279         }
 280
 281         pr_err("via_read_time: failed to read a stable value; got 0x%08lx then 0x%08lx\n",
 282                last_result.idata, result.idata);
 283
 284         return 0;
 285 }
 286
 287 /*
 288  * Set the current time to a number of seconds since January 1, 1904.
 289  *
 290  * This only works on machines with the VIA-based PRAM/RTC, which
 291  * is basically any machine with Mac II-style ADB.
 292  */
 293
 294 static void via_write_time(long time)
 295 {
 296         union {
 297                 __u8 cdata[4];
 298                 long idata;
 299         } data;
 300         __u8 temp;
 301
 302         /* Clear the write protect bit */
 303
 304         temp = 0x55;
 305         via_pram_command(0x35, &temp);
 306
 307         data.idata = time + RTC_OFFSET;
 308         via_pram_command(0x01, &data.cdata[3]);
 309         via_pram_command(0x05, &data.cdata[2]);
 310         via_pram_command(0x09, &data.cdata[1]);
 311         via_pram_command(0x0D, &data.cdata[0]);
 312
 313         /* Set the write protect bit */
 314
 315         temp = 0xD5;
 316         via_pram_command(0x35, &temp);
 317 }
 318
 319 static void via_shutdown(void)
 320 {
 321         if (rbv_present) {
 322                 via2[rBufB] &= ~0x04;
 323         } else {
 324                 /* Direction of vDirB is output */
 325                 via2[vDirB] |= 0x04;
 326                 /* Send a value of 0 on that line */
 327                 via2[vBufB] &= ~0x04;
 328                 mdelay(1000);
 329         }
 330 }
 331
 332 static void oss_shutdown(void)
 333 {
 334         oss->rom_ctrl = OSS_POWEROFF;
 335 }
 336
 337 #ifdef CONFIG_ADB_CUDA
 338 static void cuda_restart(void)
 339 {
 340         struct adb_request req;
 341
 342         if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM) < 0)
 343                 return;
 344         while (!req.complete)
 345                 cuda_poll();
 346 }
 347
 348 static void cuda_shutdown(void)
 349 {
 350         struct adb_request req;
 351
 352         if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN) < 0)
 353                 return;
 354
 355         /* Avoid infinite polling loop when PSU is not under Cuda control */
 356         switch (macintosh_config->ident) {
 357         case MAC_MODEL_C660:
 358         case MAC_MODEL_Q605:
 359         case MAC_MODEL_Q605_ACC:
 360         case MAC_MODEL_P475:
 361         case MAC_MODEL_P475F:
 362                 return;
 363         }
 364
 365         while (!req.complete)
 366                 cuda_poll();
 367 }
 368 #endif /* CONFIG_ADB_CUDA */
 369
 370 #ifdef CONFIG_ADB_PMU68K
 371
 372 void pmu_restart(void)
 373 {
 374         struct adb_request req;
 375         if (pmu_request(&req, NULL,
 376                         2, PMU_SET_INTR_MASK, PMU_INT_ADB|PMU_INT_TICK) < 0)
 377                 return;
 378         while (!req.complete)
 379                 pmu_poll();
 380         if (pmu_request(&req, NULL, 1, PMU_RESET) < 0)
 381                 return;
 382         while (!req.complete)
 383                 pmu_poll();
 384 }
 385
 386 void pmu_shutdown(void)
 387 {
 388         struct adb_request req;
 389         if (pmu_request(&req, NULL,
 390                         2, PMU_SET_INTR_MASK, PMU_INT_ADB|PMU_INT_TICK) < 0)
 391                 return;
 392         while (!req.complete)
 393                 pmu_poll();
 394         if (pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 'M', 'A', 'T', 'T') < 0)
 395                 return;
 396         while (!req.complete)
 397                 pmu_poll();
 398 }
 399
 400 #endif
 401
 402 /*
 403  *-------------------------------------------------------------------
 404  * Below this point are the generic routines; they'll dispatch to the
 405  * correct routine for the hardware on which we're running.
 406  *-------------------------------------------------------------------
 407  */
 408
 409 void mac_pram_read(int offset, __u8 *buffer, int len)
 410 {
 411         __u8 (*func)(int);
 412         int i;
 413
 414         switch (macintosh_config->adb_type) {
 415         case MAC_ADB_IOP:
 416         case MAC_ADB_II:
 417         case MAC_ADB_PB1:
 418                 func = via_read_pram;
 419                 break;
 420 #ifdef CONFIG_ADB_CUDA
 421         case MAC_ADB_EGRET:
 422         case MAC_ADB_CUDA:
 423                 func = cuda_read_pram;
 424                 break;
 425 #endif
 426 #ifdef CONFIG_ADB_PMU68K
 427         case MAC_ADB_PB2:
 428                 func = pmu_read_pram;
 429                 break;
 430 #endif
 431         default:
 432                 return;
 433         }
 434         for (i = 0 ; i < len ; i++) {
 435                 buffer[i] = (*func)(offset++);
 436         }
 437 }
 438
 439 void mac_pram_write(int offset, __u8 *buffer, int len)
 440 {
 441         void (*func)(int, __u8);
 442         int i;
 443
 444         switch (macintosh_config->adb_type) {
 445         case MAC_ADB_IOP:
 446         case MAC_ADB_II:
 447         case MAC_ADB_PB1:
 448                 func = via_write_pram;
 449                 break;
 450 #ifdef CONFIG_ADB_CUDA
 451         case MAC_ADB_EGRET:
 452         case MAC_ADB_CUDA:
 453                 func = cuda_write_pram;
 454                 break;
 455 #endif
 456 #ifdef CONFIG_ADB_PMU68K
 457         case MAC_ADB_PB2:
 458                 func = pmu_write_pram;
 459                 break;
 460 #endif
 461         default:
 462                 return;
 463         }
 464         for (i = 0 ; i < len ; i++) {
 465                 (*func)(offset++, buffer[i]);
 466         }
 467 }
 468
 469 void mac_poweroff(void)
 470 {
 471         if (oss_present) {
 472                 oss_shutdown();
 473         } else if (macintosh_config->adb_type == MAC_ADB_II) {
 474                 via_shutdown();
 475 #ifdef CONFIG_ADB_CUDA
 476         } else if (macintosh_config->adb_type == MAC_ADB_EGRET ||
 477                    macintosh_config->adb_type == MAC_ADB_CUDA) {
 478                 cuda_shutdown();
 479 #endif
 480 #ifdef CONFIG_ADB_PMU68K
 481         } else if (macintosh_config->adb_type == MAC_ADB_PB1
 482                 || macintosh_config->adb_type == MAC_ADB_PB2) {
 483                 pmu_shutdown();
 484 #endif
 485         }
 486
 487         pr_crit("It is now safe to turn off your Macintosh.\n");
 488         local_irq_disable();
 489         while(1);
 490 }
 491
 492 void mac_reset(void)
 493 {
 494         if (macintosh_config->adb_type == MAC_ADB_II) {
 495                 unsigned long flags;
 496
 497                 /* need ROMBASE in booter */
 498                 /* indeed, plus need to MAP THE ROM !! */
 499
 500                 if (mac_bi_data.rombase == 0)
 501                         mac_bi_data.rombase = 0x40800000;
 502
 503                 /* works on some */
 504                 rom_reset = (void *) (mac_bi_data.rombase + 0xa);
 505
 506                 if (macintosh_config->ident == MAC_MODEL_SE30) {
 507                         /*
 508                          * MSch: Machines known to crash on ROM reset ...
 509                          */
 510                 } else {
 511                         local_irq_save(flags);
 512
 513                         rom_reset();
 514
 515                         local_irq_restore(flags);
 516                 }
 517 #ifdef CONFIG_ADB_CUDA
 518         } else if (macintosh_config->adb_type == MAC_ADB_EGRET ||
 519                    macintosh_config->adb_type == MAC_ADB_CUDA) {
 520                 cuda_restart();
 521 #endif
 522 #ifdef CONFIG_ADB_PMU68K
 523         } else if (macintosh_config->adb_type == MAC_ADB_PB1
 524                 || macintosh_config->adb_type == MAC_ADB_PB2) {
 525                 pmu_restart();
 526 #endif
 527         } else if (CPU_IS_030) {
 528
 529                 /* 030-specific reset routine.  The idea is general, but the
 530                  * specific registers to reset are '030-specific.  Until I
 531                  * have a non-030 machine, I can't test anything else.
 532                  *  -- C. Scott Ananian <cananian@alumni.princeton.edu>
 533                  */
 534
 535                 unsigned long rombase = 0x40000000;
 536
 537                 /* make a 1-to-1 mapping, using the transparent tran. reg. */
 538                 unsigned long virt = (unsigned long) mac_reset;
 539                 unsigned long phys = virt_to_phys(mac_reset);
 540                 unsigned long addr = (phys&0xFF000000)|0x8777;
 541                 unsigned long offset = phys-virt;
 542
 543                 local_irq_disable(); /* lets not screw this up, ok? */
 544                 __asm__ __volatile__(".chip 68030\n\t"
 545                                      "pmove %0,%/tt0\n\t"
 546                                      ".chip 68k"
 547                                      : : "m" (addr));
 548                 /* Now jump to physical address so we can disable MMU */
 549                 __asm__ __volatile__(
 550                     ".chip 68030\n\t"
 551                     "lea %/pc@(1f),%/a0\n\t"
 552                     "addl %0,%/a0\n\t"/* fixup target address and stack ptr */
 553                     "addl %0,%/sp\n\t"
 554                     "pflusha\n\t"
 555                     "jmp %/a0@\n\t" /* jump into physical memory */
 556                     "0:.long 0\n\t" /* a constant zero. */
 557                     /* OK.  Now reset everything and jump to reset vector. */
 558                     "1:\n\t"
 559                     "lea %/pc@(0b),%/a0\n\t"
 560                     "pmove %/a0@, %/tc\n\t" /* disable mmu */
 561                     "pmove %/a0@, %/tt0\n\t" /* disable tt0 */
 562                     "pmove %/a0@, %/tt1\n\t" /* disable tt1 */
 563                     "movel #0, %/a0\n\t"
 564                     "movec %/a0, %/vbr\n\t" /* clear vector base register */
 565                     "movec %/a0, %/cacr\n\t" /* disable caches */
 566                     "movel #0x0808,%/a0\n\t"
 567                     "movec %/a0, %/cacr\n\t" /* flush i&d caches */
 568                     "movew #0x2700,%/sr\n\t" /* set up status register */
 569                     "movel %1@(0x0),%/a0\n\t"/* load interrupt stack pointer */
 570                     "movec %/a0, %/isp\n\t"
 571                     "movel %1@(0x4),%/a0\n\t" /* load reset vector */
 572                     "reset\n\t" /* reset external devices */
 573                     "jmp %/a0@\n\t" /* jump to the reset vector */
 574                     ".chip 68k"
 575                     : : "r" (offset), "a" (rombase) : "a0");
 576         }
 577
 578         /* should never get here */
 579         pr_crit("Restart failed. Please restart manually.\n");
 580         local_irq_disable();
 581         while(1);
 582 }
 583
 584 /*
 585  * This function translates seconds since 1970 into a proper date.
 586  *
 587  * Algorithm cribbed from glibc2.1, __offtime().
 588  */
 589 #define SECS_PER_MINUTE (60)
 590 #define SECS_PER_HOUR  (SECS_PER_MINUTE * 60)
 591 #define SECS_PER_DAY   (SECS_PER_HOUR * 24)
 592
 593 static void unmktime(unsigned long time, long offset,
 594                      int *yearp, int *monp, int *dayp,
 595                      int *hourp, int *minp, int *secp)
 596 {
 597         /* How many days come before each month (0-12).  */
 598         static const unsigned short int __mon_yday[2][13] =
 599         {
 600                 /* Normal years.  */
 601                 { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
 602                 /* Leap years.  */
 603                 { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
 604         };
 605         long int days, rem, y, wday, yday;
 606         const unsigned short int *ip;
 607
 608         days = time / SECS_PER_DAY;
 609         rem = time % SECS_PER_DAY;
 610         rem += offset;
 611         while (rem < 0) {
 612                 rem += SECS_PER_DAY;
 613                 --days;
 614         }
 615         while (rem >= SECS_PER_DAY) {
 616                 rem -= SECS_PER_DAY;
 617                 ++days;
 618         }
 619         *hourp = rem / SECS_PER_HOUR;
 620         rem %= SECS_PER_HOUR;
 621         *minp = rem / SECS_PER_MINUTE;
 622         *secp = rem % SECS_PER_MINUTE;
 623         /* January 1, 1970 was a Thursday. */
 624         wday = (4 + days) % 7; /* Day in the week. Not currently used */
 625         if (wday < 0) wday += 7;
 626         y = 1970;
 627
 628 #define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
 629 #define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
 630 #define __isleap(year)  \
 631   ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
 632
 633         while (days < 0 || days >= (__isleap (y) ? 366 : 365))
 634         {
 635                 /* Guess a corrected year, assuming 365 days per year.  */
 636                 long int yg = y + days / 365 - (days % 365 < 0);
 637
 638                 /* Adjust DAYS and Y to match the guessed year.  */
 639                 days -= (yg - y) * 365 +
 640                         LEAPS_THRU_END_OF(yg - 1) - LEAPS_THRU_END_OF(y - 1);
 641                 y = yg;
 642         }
 643         *yearp = y - 1900;
 644         yday = days; /* day in the year.  Not currently used. */
 645         ip = __mon_yday[__isleap(y)];
 646         for (y = 11; days < (long int) ip[y]; --y)
 647                 continue;
 648         days -= ip[y];
 649         *monp = y;
 650         *dayp = days + 1; /* day in the month */
 651         return;
 652 }
 653
 654 /*
 655  * Read/write the hardware clock.
 656  */
 657
 658 int mac_hwclk(int op, struct rtc_time *t)
 659 {
 660         unsigned long now;
 661
 662         if (!op) { /* read */
 663                 switch (macintosh_config->adb_type) {
 664                 case MAC_ADB_IOP:
 665                 case MAC_ADB_II:
 666                 case MAC_ADB_PB1:
 667                         now = via_read_time();
 668                         break;
 669 #ifdef CONFIG_ADB_CUDA
 670                 case MAC_ADB_EGRET:
 671                 case MAC_ADB_CUDA:
 672                         now = cuda_read_time();
 673                         break;
 674 #endif
 675 #ifdef CONFIG_ADB_PMU68K
 676                 case MAC_ADB_PB2:
 677                         now = pmu_read_time();
 678                         break;
 679 #endif
 680                 default:
 681                         now = 0;
 682                 }
 683
 684                 t->tm_wday = 0;
 685                 unmktime(now, 0,
 686                          &t->tm_year, &t->tm_mon, &t->tm_mday,
 687                          &t->tm_hour, &t->tm_min, &t->tm_sec);
 688                 pr_debug("%s: read %04d-%02d-%-2d %02d:%02d:%02d\n",
 689                          __func__, t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
 690                          t->tm_hour, t->tm_min, t->tm_sec);
 691         } else { /* write */
 692                 pr_debug("%s: tried to write %04d-%02d-%-2d %02d:%02d:%02d\n",
 693                          __func__, t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
 694                          t->tm_hour, t->tm_min, t->tm_sec);
 695
 696                 now = mktime(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
 697                              t->tm_hour, t->tm_min, t->tm_sec);
 698
 699                 switch (macintosh_config->adb_type) {
 700                 case MAC_ADB_IOP:
 701                 case MAC_ADB_II:
 702                 case MAC_ADB_PB1:
 703                         via_write_time(now);
 704                         break;
 705 #ifdef CONFIG_ADB_CUDA
 706                 case MAC_ADB_EGRET:
 707                 case MAC_ADB_CUDA:
 708                         cuda_write_time(now);
 709                         break;
 710 #endif
 711 #ifdef CONFIG_ADB_PMU68K
 712                 case MAC_ADB_PB2:
 713                         pmu_write_time(now);
 714                         break;
 715 #endif
 716                 default:
 717                         return -ENODEV;
 718                 }
 719         }
 720         return 0;
 721 }
 722
 723 /*
 724  * Set minutes/seconds in the hardware clock
 725  */
 726
 727 int mac_set_clock_mmss (unsigned long nowtime)
 728 {
 729         struct rtc_time now;
 730
 731         mac_hwclk(0, &now);
 732         now.tm_sec = nowtime % 60;
 733         now.tm_min = (nowtime / 60) % 60;
 734         mac_hwclk(1, &now);
 735
 736         return 0;
 737 }