arch/m68k/mac/misc.c

   1 /*
   2  * Miscellaneous Mac68K-specific stuff
   3  */
   4
   5 #include <linux/types.h>
   6 #include <linux/errno.h>
   7 #include <linux/miscdevice.h>
   8 #include <linux/kernel.h>
   9 #include <linux/delay.h>
  10 #include <linux/sched.h>
  11 #include <linux/slab.h>
  12 #include <linux/time.h>
  13 #include <linux/rtc.h>
  14 #include <linux/mm.h>
  15
  16 #include <linux/adb.h>
  17 #include <linux/cuda.h>
  18 #include <linux/pmu.h>
  19
  20 #include <asm/uaccess.h>
  21 #include <asm/io.h>
  22 #include <asm/rtc.h>
  23 #include <asm/system.h>
  24 #include <asm/segment.h>
  25 #include <asm/setup.h>
  26 #include <asm/macintosh.h>
  27 #include <asm/mac_via.h>
  28 #include <asm/mac_oss.h>
  29
  30 #define BOOTINFO_COMPAT_1_0
  31 #include <asm/bootinfo.h>
  32 #include <asm/machdep.h>
  33
  34 /* Offset between Unix time (1970-based) and Mac time (1904-based) */
  35
  36 #define RTC_OFFSET 2082844800
  37
  38 static void (*rom_reset)(void);
  39
  40 #ifdef CONFIG_ADB_CUDA
  41 static long cuda_read_time(void)
  42 {
  43         struct adb_request req;
  44         long time;
  45
  46         if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME) < 0)
  47                 return 0;
  48         while (!req.complete)
  49                 cuda_poll();
  50
  51         time = (req.reply[3] << 24) | (req.reply[4] << 16)
  52                 | (req.reply[5] << 8) | req.reply[6];
  53         return time - RTC_OFFSET;
  54 }
  55
  56 static void cuda_write_time(long data)
  57 {
  58         struct adb_request req;
  59         data += RTC_OFFSET;
  60         if (cuda_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME,
  61                         (data >> 24) & 0xFF, (data >> 16) & 0xFF,
  62                         (data >> 8) & 0xFF, data & 0xFF) < 0)
  63                 return;
  64         while (!req.complete)
  65                 cuda_poll();
  66 }
  67
  68 static __u8 cuda_read_pram(int offset)
  69 {
  70         struct adb_request req;
  71         if (cuda_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
  72                         (offset >> 8) & 0xFF, offset & 0xFF) < 0)
  73                 return 0;
  74         while (!req.complete)
  75                 cuda_poll();
  76         return req.reply[3];
  77 }
  78
  79 static void cuda_write_pram(int offset, __u8 data)
  80 {
  81         struct adb_request req;
  82         if (cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
  83                         (offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
  84                 return;
  85         while (!req.complete)
  86                 cuda_poll();
  87 }
  88 #else
  89 #define cuda_read_time() 0
  90 #define cuda_write_time(n)
  91 #define cuda_read_pram NULL
  92 #define cuda_write_pram NULL
  93 #endif
  94
  95 #if 0 /* def CONFIG_ADB_PMU68K */
  96 static long pmu_read_time(void)
  97 {
  98         struct adb_request req;
  99         long time;
 100
 101         if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
 102                 return 0;
 103         while (!req.complete)
 104                 pmu_poll();
 105
 106         time = (req.reply[0] << 24) | (req.reply[1] << 16)
 107                 | (req.reply[2] << 8) | req.reply[3];
 108         return time - RTC_OFFSET;
 109 }
 110
 111 static void pmu_write_time(long data)
 112 {
 113         struct adb_request req;
 114         data += RTC_OFFSET;
 115         if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
 116                         (data >> 24) & 0xFF, (data >> 16) & 0xFF,
 117                         (data >> 8) & 0xFF, data & 0xFF) < 0)
 118                 return;
 119         while (!req.complete)
 120                 pmu_poll();
 121 }
 122
 123 static __u8 pmu_read_pram(int offset)
 124 {
 125         struct adb_request req;
 126         if (pmu_request(&req, NULL, 3, PMU_READ_NVRAM,
 127                         (offset >> 8) & 0xFF, offset & 0xFF) < 0)
 128                 return 0;
 129         while (!req.complete)
 130                 pmu_poll();
 131         return req.reply[3];
 132 }
 133
 134 static void pmu_write_pram(int offset, __u8 data)
 135 {
 136         struct adb_request req;
 137         if (pmu_request(&req, NULL, 4, PMU_WRITE_NVRAM,
 138                         (offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
 139                 return;
 140         while (!req.complete)
 141                 pmu_poll();
 142 }
 143 #else
 144 #define pmu_read_time() 0
 145 #define pmu_write_time(n)
 146 #define pmu_read_pram NULL
 147 #define pmu_write_pram NULL
 148 #endif
 149
 150 #if 0 /* def CONFIG_ADB_MACIISI */
 151 extern int maciisi_request(struct adb_request *req,
 152                         void (*done)(struct adb_request *), int nbytes, ...);
 153
 154 static long maciisi_read_time(void)
 155 {
 156         struct adb_request req;
 157         long time;
 158
 159         if (maciisi_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME))
 160                 return 0;
 161
 162         time = (req.reply[3] << 24) | (req.reply[4] << 16)
 163                 | (req.reply[5] << 8) | req.reply[6];
 164         return time - RTC_OFFSET;
 165 }
 166
 167 static void maciisi_write_time(long data)
 168 {
 169         struct adb_request req;
 170         data += RTC_OFFSET;
 171         maciisi_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME,
 172                         (data >> 24) & 0xFF, (data >> 16) & 0xFF,
 173                         (data >> 8) & 0xFF, data & 0xFF);
 174 }
 175
 176 static __u8 maciisi_read_pram(int offset)
 177 {
 178         struct adb_request req;
 179         if (maciisi_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
 180                         (offset >> 8) & 0xFF, offset & 0xFF))
 181                 return 0;
 182         return req.reply[3];
 183 }
 184
 185 static void maciisi_write_pram(int offset, __u8 data)
 186 {
 187         struct adb_request req;
 188         maciisi_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
 189                         (offset >> 8) & 0xFF, offset & 0xFF, data);
 190 }
 191 #else
 192 #define maciisi_read_time() 0
 193 #define maciisi_write_time(n)
 194 #define maciisi_read_pram NULL
 195 #define maciisi_write_pram NULL
 196 #endif
 197
 198 /*
 199  * VIA PRAM/RTC access routines
 200  *
 201  * Must be called with interrupts disabled and
 202  * the RTC should be enabled.
 203  */
 204
 205 static __u8 via_pram_readbyte(void)
 206 {
 207         int     i,reg;
 208         __u8    data;
 209
 210         reg = via1[vBufB] & ~VIA1B_vRTCClk;
 211
 212         /* Set the RTC data line to be an input. */
 213
 214         via1[vDirB] &= ~VIA1B_vRTCData;
 215
 216         /* The bits of the byte come out in MSB order */
 217
 218         data = 0;
 219         for (i = 0 ; i < 8 ; i++) {
 220                 via1[vBufB] = reg;
 221                 via1[vBufB] = reg | VIA1B_vRTCClk;
 222                 data = (data << 1) | (via1[vBufB] & VIA1B_vRTCData);
 223         }
 224
 225         /* Return RTC data line to output state */
 226
 227         via1[vDirB] |= VIA1B_vRTCData;
 228
 229         return data;
 230 }
 231
 232 static void via_pram_writebyte(__u8 data)
 233 {
 234         int     i,reg,bit;
 235
 236         reg = via1[vBufB] & ~(VIA1B_vRTCClk | VIA1B_vRTCData);
 237
 238         /* The bits of the byte go in in MSB order */
 239
 240         for (i = 0 ; i < 8 ; i++) {
 241                 bit = data & 0x80? 1 : 0;
 242                 data <<= 1;
 243                 via1[vBufB] = reg | bit;
 244                 via1[vBufB] = reg | bit | VIA1B_vRTCClk;
 245         }
 246 }
 247
 248 /*
 249  * Execute a VIA PRAM/RTC command. For read commands
 250  * data should point to a one-byte buffer for the
 251  * resulting data. For write commands it should point
 252  * to the data byte to for the command.
 253  *
 254  * This function disables all interrupts while running.
 255  */
 256
 257 static void via_pram_command(int command, __u8 *data)
 258 {
 259         unsigned long flags;
 260         int     is_read;
 261
 262         local_irq_save(flags);
 263
 264         /* Enable the RTC and make sure the strobe line is high */
 265
 266         via1[vBufB] = (via1[vBufB] | VIA1B_vRTCClk) & ~VIA1B_vRTCEnb;
 267
 268         if (command & 0xFF00) {         /* extended (two-byte) command */
 269                 via_pram_writebyte((command & 0xFF00) >> 8);
 270                 via_pram_writebyte(command & 0xFF);
 271                 is_read = command & 0x8000;
 272         } else {                        /* one-byte command */
 273                 via_pram_writebyte(command);
 274                 is_read = command & 0x80;
 275         }
 276         if (is_read) {
 277                 *data = via_pram_readbyte();
 278         } else {
 279                 via_pram_writebyte(*data);
 280         }
 281
 282         /* All done, disable the RTC */
 283
 284         via1[vBufB] |= VIA1B_vRTCEnb;
 285
 286         local_irq_restore(flags);
 287 }
 288
 289 static __u8 via_read_pram(int offset)
 290 {
 291         return 0;
 292 }
 293
 294 static void via_write_pram(int offset, __u8 data)
 295 {
 296 }
 297
 298 /*
 299  * Return the current time in seconds since January 1, 1904.
 300  *
 301  * This only works on machines with the VIA-based PRAM/RTC, which
 302  * is basically any machine with Mac II-style ADB.
 303  */
 304
 305 static long via_read_time(void)
 306 {
 307         union {
 308                 __u8  cdata[4];
 309                 long  idata;
 310         } result, last_result;
 311         int     ct;
 312
 313         /*
 314          * The NetBSD guys say to loop until you get the same reading
 315          * twice in a row.
 316          */
 317
 318         ct = 0;
 319         do {
 320                 if (++ct > 10) {
 321                         printk("via_read_time: couldn't get valid time, "
 322                                "last read = 0x%08lx and 0x%08lx\n",
 323                                last_result.idata, result.idata);
 324                         break;
 325                 }
 326
 327                 last_result.idata = result.idata;
 328                 result.idata = 0;
 329
 330                 via_pram_command(0x81, &result.cdata[3]);
 331                 via_pram_command(0x85, &result.cdata[2]);
 332                 via_pram_command(0x89, &result.cdata[1]);
 333                 via_pram_command(0x8D, &result.cdata[0]);
 334         } while (result.idata != last_result.idata);
 335
 336         return result.idata - RTC_OFFSET;
 337 }
 338
 339 /*
 340  * Set the current time to a number of seconds since January 1, 1904.
 341  *
 342  * This only works on machines with the VIA-based PRAM/RTC, which
 343  * is basically any machine with Mac II-style ADB.
 344  */
 345
 346 static void via_write_time(long time)
 347 {
 348         union {
 349                 __u8  cdata[4];
 350                 long  idata;
 351         } data;
 352         __u8    temp;
 353
 354         /* Clear the write protect bit */
 355
 356         temp = 0x55;
 357         via_pram_command(0x35, &temp);
 358
 359         data.idata = time + RTC_OFFSET;
 360         via_pram_command(0x01, &data.cdata[3]);
 361         via_pram_command(0x05, &data.cdata[2]);
 362         via_pram_command(0x09, &data.cdata[1]);
 363         via_pram_command(0x0D, &data.cdata[0]);
 364
 365         /* Set the write protect bit */
 366
 367         temp = 0xD5;
 368         via_pram_command(0x35, &temp);
 369 }
 370
 371 static void via_shutdown(void)
 372 {
 373         if (rbv_present) {
 374                 via2[rBufB] &= ~0x04;
 375         } else {
 376                 /* Direction of vDirB is output */
 377                 via2[vDirB] |= 0x04;
 378                 /* Send a value of 0 on that line */
 379                 via2[vBufB] &= ~0x04;
 380                 mdelay(1000);
 381         }
 382 }
 383
 384 /*
 385  * FIXME: not sure how this is supposed to work exactly...
 386  */
 387
 388 static void oss_shutdown(void)
 389 {
 390         oss->rom_ctrl = OSS_POWEROFF;
 391 }
 392
 393 #ifdef CONFIG_ADB_CUDA
 394
 395 static void cuda_restart(void)
 396 {
 397         struct adb_request req;
 398         if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM) < 0)
 399                 return;
 400         while (!req.complete)
 401                 cuda_poll();
 402 }
 403
 404 static void cuda_shutdown(void)
 405 {
 406         struct adb_request req;
 407         if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN) < 0)
 408                 return;
 409         while (!req.complete)
 410                 cuda_poll();
 411 }
 412
 413 #endif /* CONFIG_ADB_CUDA */
 414
 415 #ifdef CONFIG_ADB_PMU68K
 416
 417 void pmu_restart(void)
 418 {
 419         struct adb_request req;
 420         if (pmu_request(&req, NULL,
 421                         2, PMU_SET_INTR_MASK, PMU_INT_ADB|PMU_INT_TICK) < 0)
 422                 return;
 423         while (!req.complete)
 424                 pmu_poll();
 425         if (pmu_request(&req, NULL, 1, PMU_RESET) < 0)
 426                 return;
 427         while (!req.complete)
 428                 pmu_poll();
 429 }
 430
 431 void pmu_shutdown(void)
 432 {
 433         struct adb_request req;
 434         if (pmu_request(&req, NULL,
 435                         2, PMU_SET_INTR_MASK, PMU_INT_ADB|PMU_INT_TICK) < 0)
 436                 return;
 437         while (!req.complete)
 438                 pmu_poll();
 439         if (pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 'M', 'A', 'T', 'T') < 0)
 440                 return;
 441         while (!req.complete)
 442                 pmu_poll();
 443 }
 444
 445 #endif
 446
 447 /*
 448  *-------------------------------------------------------------------
 449  * Below this point are the generic routines; they'll dispatch to the
 450  * correct routine for the hardware on which we're running.
 451  *-------------------------------------------------------------------
 452  */
 453
 454 void mac_pram_read(int offset, __u8 *buffer, int len)
 455 {
 456         __u8 (*func)(int);
 457         int i;
 458
 459         switch(macintosh_config->adb_type) {
 460         case MAC_ADB_IISI:
 461                 func = maciisi_read_pram; break;
 462         case MAC_ADB_PB1:
 463         case MAC_ADB_PB2:
 464                 func = pmu_read_pram; break;
 465         case MAC_ADB_CUDA:
 466                 func = cuda_read_pram; break;
 467         default:
 468                 func = via_read_pram;
 469         }
 470         if (!func)
 471                 return;
 472         for (i = 0 ; i < len ; i++) {
 473                 buffer[i] = (*func)(offset++);
 474         }
 475 }
 476
 477 void mac_pram_write(int offset, __u8 *buffer, int len)
 478 {
 479         void (*func)(int, __u8);
 480         int i;
 481
 482         switch(macintosh_config->adb_type) {
 483         case MAC_ADB_IISI:
 484                 func = maciisi_write_pram; break;
 485         case MAC_ADB_PB1:
 486         case MAC_ADB_PB2:
 487                 func = pmu_write_pram; break;
 488         case MAC_ADB_CUDA:
 489                 func = cuda_write_pram; break;
 490         default:
 491                 func = via_write_pram;
 492         }
 493         if (!func)
 494                 return;
 495         for (i = 0 ; i < len ; i++) {
 496                 (*func)(offset++, buffer[i]);
 497         }
 498 }
 499
 500 void mac_poweroff(void)
 501 {
 502         /*
 503          * MAC_ADB_IISI may need to be moved up here if it doesn't actually
 504          * work using the ADB packet method.  --David Kilzer
 505          */
 506
 507         if (oss_present) {
 508                 oss_shutdown();
 509         } else if (macintosh_config->adb_type == MAC_ADB_II) {
 510                 via_shutdown();
 511 #ifdef CONFIG_ADB_CUDA
 512         } else if (macintosh_config->adb_type == MAC_ADB_CUDA) {
 513                 cuda_shutdown();
 514 #endif
 515 #ifdef CONFIG_ADB_PMU68K
 516         } else if (macintosh_config->adb_type == MAC_ADB_PB1
 517                 || macintosh_config->adb_type == MAC_ADB_PB2) {
 518                 pmu_shutdown();
 519 #endif
 520         }
 521         local_irq_enable();
 522         printk("It is now safe to turn off your Macintosh.\n");
 523         while(1);
 524 }
 525
 526 void mac_reset(void)
 527 {
 528         if (macintosh_config->adb_type == MAC_ADB_II) {
 529                 unsigned long flags;
 530
 531                 /* need ROMBASE in booter */
 532                 /* indeed, plus need to MAP THE ROM !! */
 533
 534                 if (mac_bi_data.rombase == 0)
 535                         mac_bi_data.rombase = 0x40800000;
 536
 537                 /* works on some */
 538                 rom_reset = (void *) (mac_bi_data.rombase + 0xa);
 539
 540                 if (macintosh_config->ident == MAC_MODEL_SE30) {
 541                         /*
 542                          * MSch: Machines known to crash on ROM reset ...
 543                          */
 544                 } else {
 545                         local_irq_save(flags);
 546
 547                         rom_reset();
 548
 549                         local_irq_restore(flags);
 550                 }
 551 #ifdef CONFIG_ADB_CUDA
 552         } else if (macintosh_config->adb_type == MAC_ADB_CUDA) {
 553                 cuda_restart();
 554 #endif
 555 #ifdef CONFIG_ADB_PMU68K
 556         } else if (macintosh_config->adb_type == MAC_ADB_PB1
 557                 || macintosh_config->adb_type == MAC_ADB_PB2) {
 558                 pmu_restart();
 559 #endif
 560         } else if (CPU_IS_030) {
 561
 562                 /* 030-specific reset routine.  The idea is general, but the
 563                  * specific registers to reset are '030-specific.  Until I
 564                  * have a non-030 machine, I can't test anything else.
 565                  *  -- C. Scott Ananian <cananian@alumni.princeton.edu>
 566                  */
 567
 568                 unsigned long rombase = 0x40000000;
 569
 570                 /* make a 1-to-1 mapping, using the transparent tran. reg. */
 571                 unsigned long virt = (unsigned long) mac_reset;
 572                 unsigned long phys = virt_to_phys(mac_reset);
 573                 unsigned long addr = (phys&0xFF000000)|0x8777;
 574                 unsigned long offset = phys-virt;
 575                 local_irq_disable(); /* lets not screw this up, ok? */
 576                 __asm__ __volatile__(".chip 68030\n\t"
 577                                      "pmove %0,%/tt0\n\t"
 578                                      ".chip 68k"
 579                                      : : "m" (addr));
 580                 /* Now jump to physical address so we can disable MMU */
 581                 __asm__ __volatile__(
 582                     ".chip 68030\n\t"
 583                     "lea %/pc@(1f),%/a0\n\t"
 584                     "addl %0,%/a0\n\t"/* fixup target address and stack ptr */
 585                     "addl %0,%/sp\n\t"
 586                     "pflusha\n\t"
 587                     "jmp %/a0@\n\t" /* jump into physical memory */
 588                     "0:.long 0\n\t" /* a constant zero. */
 589                     /* OK.  Now reset everything and jump to reset vector. */
 590                     "1:\n\t"
 591                     "lea %/pc@(0b),%/a0\n\t"
 592                     "pmove %/a0@, %/tc\n\t" /* disable mmu */
 593                     "pmove %/a0@, %/tt0\n\t" /* disable tt0 */
 594                     "pmove %/a0@, %/tt1\n\t" /* disable tt1 */
 595                     "movel #0, %/a0\n\t"
 596                     "movec %/a0, %/vbr\n\t" /* clear vector base register */
 597                     "movec %/a0, %/cacr\n\t" /* disable caches */
 598                     "movel #0x0808,%/a0\n\t"
 599                     "movec %/a0, %/cacr\n\t" /* flush i&d caches */
 600                     "movew #0x2700,%/sr\n\t" /* set up status register */
 601                     "movel %1@(0x0),%/a0\n\t"/* load interrupt stack pointer */
 602                     "movec %/a0, %/isp\n\t"
 603                     "movel %1@(0x4),%/a0\n\t" /* load reset vector */
 604                     "reset\n\t" /* reset external devices */
 605                     "jmp %/a0@\n\t" /* jump to the reset vector */
 606                     ".chip 68k"
 607                     : : "r" (offset), "a" (rombase) : "a0");
 608         }
 609
 610         /* should never get here */
 611         local_irq_enable();
 612         printk ("Restart failed.  Please restart manually.\n");
 613         while(1);
 614 }
 615
 616 /*
 617  * This function translates seconds since 1970 into a proper date.
 618  *
 619  * Algorithm cribbed from glibc2.1, __offtime().
 620  */
 621 #define SECS_PER_MINUTE (60)
 622 #define SECS_PER_HOUR  (SECS_PER_MINUTE * 60)
 623 #define SECS_PER_DAY   (SECS_PER_HOUR * 24)
 624
 625 static void unmktime(unsigned long time, long offset,
 626                      int *yearp, int *monp, int *dayp,
 627                      int *hourp, int *minp, int *secp)
 628 {
 629         /* How many days come before each month (0-12).  */
 630         static const unsigned short int __mon_yday[2][13] =
 631         {
 632                 /* Normal years.  */
 633                 { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
 634                 /* Leap years.  */
 635                 { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
 636         };
 637         long int days, rem, y, wday, yday;
 638         const unsigned short int *ip;
 639
 640         days = time / SECS_PER_DAY;
 641         rem = time % SECS_PER_DAY;
 642         rem += offset;
 643         while (rem < 0) {
 644                 rem += SECS_PER_DAY;
 645                 --days;
 646         }
 647         while (rem >= SECS_PER_DAY) {
 648                 rem -= SECS_PER_DAY;
 649                 ++days;
 650         }
 651         *hourp = rem / SECS_PER_HOUR;
 652         rem %= SECS_PER_HOUR;
 653         *minp = rem / SECS_PER_MINUTE;
 654         *secp = rem % SECS_PER_MINUTE;
 655         /* January 1, 1970 was a Thursday. */
 656         wday = (4 + days) % 7; /* Day in the week. Not currently used */
 657         if (wday < 0) wday += 7;
 658         y = 1970;
 659
 660 #define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
 661 #define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
 662 #define __isleap(year)  \
 663   ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
 664
 665         while (days < 0 || days >= (__isleap (y) ? 366 : 365))
 666         {
 667                 /* Guess a corrected year, assuming 365 days per year.  */
 668                 long int yg = y + days / 365 - (days % 365 < 0);
 669
 670                 /* Adjust DAYS and Y to match the guessed year.  */
 671                 days -= ((yg - y) * 365
 672                          + LEAPS_THRU_END_OF (yg - 1)
 673                          - LEAPS_THRU_END_OF (y - 1));
 674                 y = yg;
 675         }
 676         *yearp = y - 1900;
 677         yday = days; /* day in the year.  Not currently used. */
 678         ip = __mon_yday[__isleap(y)];
 679         for (y = 11; days < (long int) ip[y]; --y)
 680                 continue;
 681         days -= ip[y];
 682         *monp = y;
 683         *dayp = days + 1; /* day in the month */
 684         return;
 685 }
 686
 687 /*
 688  * Read/write the hardware clock.
 689  */
 690
 691 int mac_hwclk(int op, struct rtc_time *t)
 692 {
 693         unsigned long now;
 694
 695         if (!op) { /* read */
 696                 switch (macintosh_config->adb_type) {
 697                 case MAC_ADB_II:
 698                 case MAC_ADB_IOP:
 699                         now = via_read_time();
 700                         break;
 701                 case MAC_ADB_IISI:
 702                         now = maciisi_read_time();
 703                         break;
 704                 case MAC_ADB_PB1:
 705                 case MAC_ADB_PB2:
 706                         now = pmu_read_time();
 707                         break;
 708                 case MAC_ADB_CUDA:
 709                         now = cuda_read_time();
 710                         break;
 711                 default:
 712                         now = 0;
 713                 }
 714
 715                 t->tm_wday = 0;
 716                 unmktime(now, 0,
 717                          &t->tm_year, &t->tm_mon, &t->tm_mday,
 718                          &t->tm_hour, &t->tm_min, &t->tm_sec);
 719 #if 0
 720                 printk("mac_hwclk: read %04d-%02d-%-2d %02d:%02d:%02d\n",
 721                         t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
 722                         t->tm_hour, t->tm_min, t->tm_sec);
 723 #endif
 724         } else { /* write */
 725 #if 0
 726                 printk("mac_hwclk: tried to write %04d-%02d-%-2d %02d:%02d:%02d\n",
 727                         t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
 728                         t->tm_hour, t->tm_min, t->tm_sec);
 729 #endif
 730
 731                 now = mktime(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
 732                              t->tm_hour, t->tm_min, t->tm_sec);
 733
 734                 switch (macintosh_config->adb_type) {
 735                 case MAC_ADB_II:
 736                 case MAC_ADB_IOP:
 737                         via_write_time(now);
 738                         break;
 739                 case MAC_ADB_CUDA:
 740                         cuda_write_time(now);
 741                         break;
 742                 case MAC_ADB_PB1:
 743                 case MAC_ADB_PB2:
 744                         pmu_write_time(now);
 745                         break;
 746                 case MAC_ADB_IISI:
 747                         maciisi_write_time(now);
 748                 }
 749         }
 750         return 0;
 751 }
 752
 753 /*
 754  * Set minutes/seconds in the hardware clock
 755  */
 756
 757 int mac_set_clock_mmss (unsigned long nowtime)
 758 {
 759         struct rtc_time now;
 760
 761         mac_hwclk(0, &now);
 762         now.tm_sec = nowtime % 60;
 763         now.tm_min = (nowtime / 60) % 60;
 764         mac_hwclk(1, &now);
 765
 766         return 0;
 767 }