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 /*
  30  * Offset between Unix time (1970-based) and Mac time (1904-based). Cuda and PMU
  31  * times wrap in 2040. If we need to handle later times, the read_time functions
  32  * need to be changed to interpret wrapped times as post-2040.
  33  */
  34
  35 #define RTC_OFFSET 2082844800
  36
  37 static void (*rom_reset)(void);
  38
  39 #ifdef CONFIG_ADB_CUDA
  40 static time64_t cuda_read_time(void)
  41 {
  42         struct adb_request req;
  43         time64_t time;
  44
  45         if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME) < 0)
  46                 return 0;
  47         while (!req.complete)
  48                 cuda_poll();
  49
  50         time = (u32)((req.reply[3] << 24) | (req.reply[4] << 16) |
  51                      (req.reply[5] << 8) | req.reply[6]);
  52
  53         return time - RTC_OFFSET;
  54 }
  55
  56 static void cuda_write_time(time64_t time)
  57 {
  58         struct adb_request req;
  59         u32 data = lower_32_bits(time + RTC_OFFSET);
  60
  61         if (cuda_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME,
  62                          (data >> 24) & 0xFF, (data >> 16) & 0xFF,
  63                          (data >> 8) & 0xFF, data & 0xFF) < 0)
  64                 return;
  65         while (!req.complete)
  66                 cuda_poll();
  67 }
  68
  69 static __u8 cuda_read_pram(int offset)
  70 {
  71         struct adb_request req;
  72
  73         if (cuda_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
  74                          (offset >> 8) & 0xFF, offset & 0xFF) < 0)
  75                 return 0;
  76         while (!req.complete)
  77                 cuda_poll();
  78         return req.reply[3];
  79 }
  80
  81 static void cuda_write_pram(int offset, __u8 data)
  82 {
  83         struct adb_request req;
  84
  85         if (cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
  86                          (offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
  87                 return;
  88         while (!req.complete)
  89                 cuda_poll();
  90 }
  91 #endif /* CONFIG_ADB_CUDA */
  92
  93 #ifdef CONFIG_ADB_PMU
  94 static time64_t pmu_read_time(void)
  95 {
  96         struct adb_request req;
  97         time64_t time;
  98
  99         if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
 100                 return 0;
 101         pmu_wait_complete(&req);
 102
 103         time = (u32)((req.reply[0] << 24) | (req.reply[1] << 16) |
 104                      (req.reply[2] << 8) | req.reply[3]);
 105
 106         return time - RTC_OFFSET;
 107 }
 108
 109 static void pmu_write_time(time64_t time)
 110 {
 111         struct adb_request req;
 112         u32 data = lower_32_bits(time + RTC_OFFSET);
 113
 114         if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
 115                         (data >> 24) & 0xFF, (data >> 16) & 0xFF,
 116                         (data >> 8) & 0xFF, data & 0xFF) < 0)
 117                 return;
 118         pmu_wait_complete(&req);
 119 }
 120
 121 static __u8 pmu_read_pram(int offset)
 122 {
 123         struct adb_request req;
 124
 125         if (pmu_request(&req, NULL, 3, PMU_READ_NVRAM,
 126                         (offset >> 8) & 0xFF, offset & 0xFF) < 0)
 127                 return 0;
 128         while (!req.complete)
 129                 pmu_poll();
 130         return req.reply[3];
 131 }
 132
 133 static void pmu_write_pram(int offset, __u8 data)
 134 {
 135         struct adb_request req;
 136
 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 #endif /* CONFIG_ADB_PMU */
 144
 145 /*
 146  * VIA PRAM/RTC access routines
 147  *
 148  * Must be called with interrupts disabled and
 149  * the RTC should be enabled.
 150  */
 151
 152 static __u8 via_pram_readbyte(void)
 153 {
 154         int i, reg;
 155         __u8 data;
 156
 157         reg = via1[vBufB] & ~VIA1B_vRTCClk;
 158
 159         /* Set the RTC data line to be an input. */
 160
 161         via1[vDirB] &= ~VIA1B_vRTCData;
 162
 163         /* The bits of the byte come out in MSB order */
 164
 165         data = 0;
 166         for (i = 0 ; i < 8 ; i++) {
 167                 via1[vBufB] = reg;
 168                 via1[vBufB] = reg | VIA1B_vRTCClk;
 169                 data = (data << 1) | (via1[vBufB] & VIA1B_vRTCData);
 170         }
 171
 172         /* Return RTC data line to output state */
 173
 174         via1[vDirB] |= VIA1B_vRTCData;
 175
 176         return data;
 177 }
 178
 179 static void via_pram_writebyte(__u8 data)
 180 {
 181         int i, reg, bit;
 182
 183         reg = via1[vBufB] & ~(VIA1B_vRTCClk | VIA1B_vRTCData);
 184
 185         /* The bits of the byte go in in MSB order */
 186
 187         for (i = 0 ; i < 8 ; i++) {
 188                 bit = data & 0x80? 1 : 0;
 189                 data <<= 1;
 190                 via1[vBufB] = reg | bit;
 191                 via1[vBufB] = reg | bit | VIA1B_vRTCClk;
 192         }
 193 }
 194
 195 /*
 196  * Execute a VIA PRAM/RTC command. For read commands
 197  * data should point to a one-byte buffer for the
 198  * resulting data. For write commands it should point
 199  * to the data byte to for the command.
 200  *
 201  * This function disables all interrupts while running.
 202  */
 203
 204 static void via_pram_command(int command, __u8 *data)
 205 {
 206         unsigned long flags;
 207         int is_read;
 208
 209         local_irq_save(flags);
 210
 211         /* Enable the RTC and make sure the strobe line is high */
 212
 213         via1[vBufB] = (via1[vBufB] | VIA1B_vRTCClk) & ~VIA1B_vRTCEnb;
 214
 215         if (command & 0xFF00) {         /* extended (two-byte) command */
 216                 via_pram_writebyte((command & 0xFF00) >> 8);
 217                 via_pram_writebyte(command & 0xFF);
 218                 is_read = command & 0x8000;
 219         } else {                        /* one-byte command */
 220                 via_pram_writebyte(command);
 221                 is_read = command & 0x80;
 222         }
 223         if (is_read) {
 224                 *data = via_pram_readbyte();
 225         } else {
 226                 via_pram_writebyte(*data);
 227         }
 228
 229         /* All done, disable the RTC */
 230
 231         via1[vBufB] |= VIA1B_vRTCEnb;
 232
 233         local_irq_restore(flags);
 234 }
 235
 236 static __u8 via_read_pram(int offset)
 237 {
 238         return 0;
 239 }
 240
 241 static void via_write_pram(int offset, __u8 data)
 242 {
 243 }
 244
 245 /*
 246  * Return the current time in seconds since January 1, 1904.
 247  *
 248  * This only works on machines with the VIA-based PRAM/RTC, which
 249  * is basically any machine with Mac II-style ADB.
 250  */
 251
 252 static time64_t via_read_time(void)
 253 {
 254         union {
 255                 __u8 cdata[4];
 256                 __u32 idata;
 257         } result, last_result;
 258         int count = 1;
 259
 260         via_pram_command(0x81, &last_result.cdata[3]);
 261         via_pram_command(0x85, &last_result.cdata[2]);
 262         via_pram_command(0x89, &last_result.cdata[1]);
 263         via_pram_command(0x8D, &last_result.cdata[0]);
 264
 265         /*
 266          * The NetBSD guys say to loop until you get the same reading
 267          * twice in a row.
 268          */
 269
 270         while (1) {
 271                 via_pram_command(0x81, &result.cdata[3]);
 272                 via_pram_command(0x85, &result.cdata[2]);
 273                 via_pram_command(0x89, &result.cdata[1]);
 274                 via_pram_command(0x8D, &result.cdata[0]);
 275
 276                 if (result.idata == last_result.idata)
 277                         return (time64_t)result.idata - RTC_OFFSET;
 278
 279                 if (++count > 10)
 280                         break;
 281
 282                 last_result.idata = result.idata;
 283         }
 284
 285         pr_err("%s: failed to read a stable value; got 0x%08x then 0x%08x\n",
 286                __func__, last_result.idata, result.idata);
 287
 288         return 0;
 289 }
 290
 291 /*
 292  * Set the current time to a number of seconds since January 1, 1904.
 293  *
 294  * This only works on machines with the VIA-based PRAM/RTC, which
 295  * is basically any machine with Mac II-style ADB.
 296  */
 297
 298 static void via_write_time(time64_t time)
 299 {
 300         union {
 301                 __u8 cdata[4];
 302                 __u32 idata;
 303         } data;
 304         __u8 temp;
 305
 306         /* Clear the write protect bit */
 307
 308         temp = 0x55;
 309         via_pram_command(0x35, &temp);
 310
 311         data.idata = lower_32_bits(time + RTC_OFFSET);
 312         via_pram_command(0x01, &data.cdata[3]);
 313         via_pram_command(0x05, &data.cdata[2]);
 314         via_pram_command(0x09, &data.cdata[1]);
 315         via_pram_command(0x0D, &data.cdata[0]);
 316
 317         /* Set the write protect bit */
 318
 319         temp = 0xD5;
 320         via_pram_command(0x35, &temp);
 321 }
 322
 323 static void via_shutdown(void)
 324 {
 325         if (rbv_present) {
 326                 via2[rBufB] &= ~0x04;
 327         } else {
 328                 /* Direction of vDirB is output */
 329                 via2[vDirB] |= 0x04;
 330                 /* Send a value of 0 on that line */
 331                 via2[vBufB] &= ~0x04;
 332                 mdelay(1000);
 333         }
 334 }
 335
 336 static void oss_shutdown(void)
 337 {
 338         oss->rom_ctrl = OSS_POWEROFF;
 339 }
 340
 341 #ifdef CONFIG_ADB_CUDA
 342 static void cuda_restart(void)
 343 {
 344         struct adb_request req;
 345
 346         if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM) < 0)
 347                 return;
 348         while (!req.complete)
 349                 cuda_poll();
 350 }
 351
 352 static void cuda_shutdown(void)
 353 {
 354         struct adb_request req;
 355
 356         if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN) < 0)
 357                 return;
 358
 359         /* Avoid infinite polling loop when PSU is not under Cuda control */
 360         switch (macintosh_config->ident) {
 361         case MAC_MODEL_C660:
 362         case MAC_MODEL_Q605:
 363         case MAC_MODEL_Q605_ACC:
 364         case MAC_MODEL_P475:
 365         case MAC_MODEL_P475F:
 366                 return;
 367         }
 368
 369         while (!req.complete)
 370                 cuda_poll();
 371 }
 372 #endif /* CONFIG_ADB_CUDA */
 373
 374 /*
 375  *-------------------------------------------------------------------
 376  * Below this point are the generic routines; they'll dispatch to the
 377  * correct routine for the hardware on which we're running.
 378  *-------------------------------------------------------------------
 379  */
 380
 381 void mac_pram_read(int offset, __u8 *buffer, int len)
 382 {
 383         __u8 (*func)(int);
 384         int i;
 385
 386         switch (macintosh_config->adb_type) {
 387         case MAC_ADB_IOP:
 388         case MAC_ADB_II:
 389         case MAC_ADB_PB1:
 390                 func = via_read_pram;
 391                 break;
 392 #ifdef CONFIG_ADB_CUDA
 393         case MAC_ADB_EGRET:
 394         case MAC_ADB_CUDA:
 395                 func = cuda_read_pram;
 396                 break;
 397 #endif
 398 #ifdef CONFIG_ADB_PMU
 399         case MAC_ADB_PB2:
 400                 func = pmu_read_pram;
 401                 break;
 402 #endif
 403         default:
 404                 return;
 405         }
 406         for (i = 0 ; i < len ; i++) {
 407                 buffer[i] = (*func)(offset++);
 408         }
 409 }
 410
 411 void mac_pram_write(int offset, __u8 *buffer, int len)
 412 {
 413         void (*func)(int, __u8);
 414         int i;
 415
 416         switch (macintosh_config->adb_type) {
 417         case MAC_ADB_IOP:
 418         case MAC_ADB_II:
 419         case MAC_ADB_PB1:
 420                 func = via_write_pram;
 421                 break;
 422 #ifdef CONFIG_ADB_CUDA
 423         case MAC_ADB_EGRET:
 424         case MAC_ADB_CUDA:
 425                 func = cuda_write_pram;
 426                 break;
 427 #endif
 428 #ifdef CONFIG_ADB_PMU
 429         case MAC_ADB_PB2:
 430                 func = pmu_write_pram;
 431                 break;
 432 #endif
 433         default:
 434                 return;
 435         }
 436         for (i = 0 ; i < len ; i++) {
 437                 (*func)(offset++, buffer[i]);
 438         }
 439 }
 440
 441 void mac_poweroff(void)
 442 {
 443         if (oss_present) {
 444                 oss_shutdown();
 445         } else if (macintosh_config->adb_type == MAC_ADB_II) {
 446                 via_shutdown();
 447 #ifdef CONFIG_ADB_CUDA
 448         } else if (macintosh_config->adb_type == MAC_ADB_EGRET ||
 449                    macintosh_config->adb_type == MAC_ADB_CUDA) {
 450                 cuda_shutdown();
 451 #endif
 452 #ifdef CONFIG_ADB_PMU
 453         } else if (macintosh_config->adb_type == MAC_ADB_PB2) {
 454                 pmu_shutdown();
 455 #endif
 456         }
 457
 458         pr_crit("It is now safe to turn off your Macintosh.\n");
 459         local_irq_disable();
 460         while(1);
 461 }
 462
 463 void mac_reset(void)
 464 {
 465         if (macintosh_config->adb_type == MAC_ADB_II) {
 466                 unsigned long flags;
 467
 468                 /* need ROMBASE in booter */
 469                 /* indeed, plus need to MAP THE ROM !! */
 470
 471                 if (mac_bi_data.rombase == 0)
 472                         mac_bi_data.rombase = 0x40800000;
 473
 474                 /* works on some */
 475                 rom_reset = (void *) (mac_bi_data.rombase + 0xa);
 476
 477                 if (macintosh_config->ident == MAC_MODEL_SE30) {
 478                         /*
 479                          * MSch: Machines known to crash on ROM reset ...
 480                          */
 481                 } else {
 482                         local_irq_save(flags);
 483
 484                         rom_reset();
 485
 486                         local_irq_restore(flags);
 487                 }
 488 #ifdef CONFIG_ADB_CUDA
 489         } else if (macintosh_config->adb_type == MAC_ADB_EGRET ||
 490                    macintosh_config->adb_type == MAC_ADB_CUDA) {
 491                 cuda_restart();
 492 #endif
 493 #ifdef CONFIG_ADB_PMU
 494         } else if (macintosh_config->adb_type == MAC_ADB_PB2) {
 495                 pmu_restart();
 496 #endif
 497         } else if (CPU_IS_030) {
 498
 499                 /* 030-specific reset routine.  The idea is general, but the
 500                  * specific registers to reset are '030-specific.  Until I
 501                  * have a non-030 machine, I can't test anything else.
 502                  *  -- C. Scott Ananian <cananian@alumni.princeton.edu>
 503                  */
 504
 505                 unsigned long rombase = 0x40000000;
 506
 507                 /* make a 1-to-1 mapping, using the transparent tran. reg. */
 508                 unsigned long virt = (unsigned long) mac_reset;
 509                 unsigned long phys = virt_to_phys(mac_reset);
 510                 unsigned long addr = (phys&0xFF000000)|0x8777;
 511                 unsigned long offset = phys-virt;
 512
 513                 local_irq_disable(); /* lets not screw this up, ok? */
 514                 __asm__ __volatile__(".chip 68030\n\t"
 515                                      "pmove %0,%/tt0\n\t"
 516                                      ".chip 68k"
 517                                      : : "m" (addr));
 518                 /* Now jump to physical address so we can disable MMU */
 519                 __asm__ __volatile__(
 520                     ".chip 68030\n\t"
 521                     "lea %/pc@(1f),%/a0\n\t"
 522                     "addl %0,%/a0\n\t"/* fixup target address and stack ptr */
 523                     "addl %0,%/sp\n\t"
 524                     "pflusha\n\t"
 525                     "jmp %/a0@\n\t" /* jump into physical memory */
 526                     "0:.long 0\n\t" /* a constant zero. */
 527                     /* OK.  Now reset everything and jump to reset vector. */
 528                     "1:\n\t"
 529                     "lea %/pc@(0b),%/a0\n\t"
 530                     "pmove %/a0@, %/tc\n\t" /* disable mmu */
 531                     "pmove %/a0@, %/tt0\n\t" /* disable tt0 */
 532                     "pmove %/a0@, %/tt1\n\t" /* disable tt1 */
 533                     "movel #0, %/a0\n\t"
 534                     "movec %/a0, %/vbr\n\t" /* clear vector base register */
 535                     "movec %/a0, %/cacr\n\t" /* disable caches */
 536                     "movel #0x0808,%/a0\n\t"
 537                     "movec %/a0, %/cacr\n\t" /* flush i&d caches */
 538                     "movew #0x2700,%/sr\n\t" /* set up status register */
 539                     "movel %1@(0x0),%/a0\n\t"/* load interrupt stack pointer */
 540                     "movec %/a0, %/isp\n\t"
 541                     "movel %1@(0x4),%/a0\n\t" /* load reset vector */
 542                     "reset\n\t" /* reset external devices */
 543                     "jmp %/a0@\n\t" /* jump to the reset vector */
 544                     ".chip 68k"
 545                     : : "r" (offset), "a" (rombase) : "a0");
 546         }
 547
 548         /* should never get here */
 549         pr_crit("Restart failed. Please restart manually.\n");
 550         local_irq_disable();
 551         while(1);
 552 }
 553
 554 /*
 555  * This function translates seconds since 1970 into a proper date.
 556  *
 557  * Algorithm cribbed from glibc2.1, __offtime().
 558  *
 559  * This is roughly same as rtc_time64_to_tm(), which we should probably
 560  * use here, but it's only available when CONFIG_RTC_LIB is enabled.
 561  */
 562 #define SECS_PER_MINUTE (60)
 563 #define SECS_PER_HOUR  (SECS_PER_MINUTE * 60)
 564 #define SECS_PER_DAY   (SECS_PER_HOUR * 24)
 565
 566 static void unmktime(time64_t time, long offset,
 567                      int *yearp, int *monp, int *dayp,
 568                      int *hourp, int *minp, int *secp)
 569 {
 570         /* How many days come before each month (0-12).  */
 571         static const unsigned short int __mon_yday[2][13] =
 572         {
 573                 /* Normal years.  */
 574                 { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
 575                 /* Leap years.  */
 576                 { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
 577         };
 578         int days, rem, y, wday, yday;
 579         const unsigned short int *ip;
 580
 581         days = div_u64_rem(time, SECS_PER_DAY, &rem);
 582         rem += offset;
 583         while (rem < 0) {
 584                 rem += SECS_PER_DAY;
 585                 --days;
 586         }
 587         while (rem >= SECS_PER_DAY) {
 588                 rem -= SECS_PER_DAY;
 589                 ++days;
 590         }
 591         *hourp = rem / SECS_PER_HOUR;
 592         rem %= SECS_PER_HOUR;
 593         *minp = rem / SECS_PER_MINUTE;
 594         *secp = rem % SECS_PER_MINUTE;
 595         /* January 1, 1970 was a Thursday. */
 596         wday = (4 + days) % 7; /* Day in the week. Not currently used */
 597         if (wday < 0) wday += 7;
 598         y = 1970;
 599
 600 #define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
 601 #define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
 602 #define __isleap(year)  \
 603   ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
 604
 605         while (days < 0 || days >= (__isleap (y) ? 366 : 365))
 606         {
 607                 /* Guess a corrected year, assuming 365 days per year.  */
 608                 long int yg = y + days / 365 - (days % 365 < 0);
 609
 610                 /* Adjust DAYS and Y to match the guessed year.  */
 611                 days -= (yg - y) * 365 +
 612                         LEAPS_THRU_END_OF(yg - 1) - LEAPS_THRU_END_OF(y - 1);
 613                 y = yg;
 614         }
 615         *yearp = y - 1900;
 616         yday = days; /* day in the year.  Not currently used. */
 617         ip = __mon_yday[__isleap(y)];
 618         for (y = 11; days < (long int) ip[y]; --y)
 619                 continue;
 620         days -= ip[y];
 621         *monp = y;
 622         *dayp = days + 1; /* day in the month */
 623         return;
 624 }
 625
 626 /*
 627  * Read/write the hardware clock.
 628  */
 629
 630 int mac_hwclk(int op, struct rtc_time *t)
 631 {
 632         time64_t now;
 633
 634         if (!op) { /* read */
 635                 switch (macintosh_config->adb_type) {
 636                 case MAC_ADB_IOP:
 637                 case MAC_ADB_II:
 638                 case MAC_ADB_PB1:
 639                         now = via_read_time();
 640                         break;
 641 #ifdef CONFIG_ADB_CUDA
 642                 case MAC_ADB_EGRET:
 643                 case MAC_ADB_CUDA:
 644                         now = cuda_read_time();
 645                         break;
 646 #endif
 647 #ifdef CONFIG_ADB_PMU
 648                 case MAC_ADB_PB2:
 649                         now = pmu_read_time();
 650                         break;
 651 #endif
 652                 default:
 653                         now = 0;
 654                 }
 655
 656                 t->tm_wday = 0;
 657                 unmktime(now, 0,
 658                          &t->tm_year, &t->tm_mon, &t->tm_mday,
 659                          &t->tm_hour, &t->tm_min, &t->tm_sec);
 660                 pr_debug("%s: read %04d-%02d-%-2d %02d:%02d:%02d\n",
 661                          __func__, t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
 662                          t->tm_hour, t->tm_min, t->tm_sec);
 663         } else { /* write */
 664                 pr_debug("%s: tried to write %04d-%02d-%-2d %02d:%02d:%02d\n",
 665                          __func__, t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
 666                          t->tm_hour, t->tm_min, t->tm_sec);
 667
 668                 now = mktime64(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
 669                                t->tm_hour, t->tm_min, t->tm_sec);
 670
 671                 switch (macintosh_config->adb_type) {
 672                 case MAC_ADB_IOP:
 673                 case MAC_ADB_II:
 674                 case MAC_ADB_PB1:
 675                         via_write_time(now);
 676                         break;
 677 #ifdef CONFIG_ADB_CUDA
 678                 case MAC_ADB_EGRET:
 679                 case MAC_ADB_CUDA:
 680                         cuda_write_time(now);
 681                         break;
 682 #endif
 683 #ifdef CONFIG_ADB_PMU
 684                 case MAC_ADB_PB2:
 685                         pmu_write_time(now);
 686                         break;
 687 #endif
 688                 default:
 689                         return -ENODEV;
 690                 }
 691         }
 692         return 0;
 693 }