NFSv4.1/flexfiles: Fix a protocol error in layoutreturn
[linux/fpc-iii.git] / arch / m68k / mac / misc.c
blob707b61aea2030c8f7de9058a2546a8eb85ce1639
1 /*
2 * Miscellaneous Mac68K-specific stuff
3 */
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/time.h>
12 #include <linux/rtc.h>
13 #include <linux/mm.h>
15 #include <linux/adb.h>
16 #include <linux/cuda.h>
17 #include <linux/pmu.h>
19 #include <asm/uaccess.h>
20 #include <asm/io.h>
21 #include <asm/rtc.h>
22 #include <asm/segment.h>
23 #include <asm/setup.h>
24 #include <asm/macintosh.h>
25 #include <asm/mac_via.h>
26 #include <asm/mac_oss.h>
28 #include <asm/machdep.h>
30 /* Offset between Unix time (1970-based) and Mac time (1904-based) */
32 #define RTC_OFFSET 2082844800
34 static void (*rom_reset)(void);
36 #ifdef CONFIG_ADB_CUDA
37 static long cuda_read_time(void)
39 struct adb_request req;
40 long time;
42 if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME) < 0)
43 return 0;
44 while (!req.complete)
45 cuda_poll();
47 time = (req.reply[3] << 24) | (req.reply[4] << 16)
48 | (req.reply[5] << 8) | req.reply[6];
49 return time - RTC_OFFSET;
52 static void cuda_write_time(long data)
54 struct adb_request req;
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();
64 static __u8 cuda_read_pram(int offset)
66 struct adb_request req;
67 if (cuda_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
68 (offset >> 8) & 0xFF, offset & 0xFF) < 0)
69 return 0;
70 while (!req.complete)
71 cuda_poll();
72 return req.reply[3];
75 static void cuda_write_pram(int offset, __u8 data)
77 struct adb_request req;
78 if (cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
79 (offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
80 return;
81 while (!req.complete)
82 cuda_poll();
84 #else
85 #define cuda_read_time() 0
86 #define cuda_write_time(n)
87 #define cuda_read_pram NULL
88 #define cuda_write_pram NULL
89 #endif
91 #ifdef CONFIG_ADB_PMU68K
92 static long pmu_read_time(void)
94 struct adb_request req;
95 long time;
97 if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
98 return 0;
99 while (!req.complete)
100 pmu_poll();
102 time = (req.reply[1] << 24) | (req.reply[2] << 16)
103 | (req.reply[3] << 8) | req.reply[4];
104 return time - RTC_OFFSET;
107 static void pmu_write_time(long data)
109 struct adb_request req;
110 data += RTC_OFFSET;
111 if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
112 (data >> 24) & 0xFF, (data >> 16) & 0xFF,
113 (data >> 8) & 0xFF, data & 0xFF) < 0)
114 return;
115 while (!req.complete)
116 pmu_poll();
119 static __u8 pmu_read_pram(int offset)
121 struct adb_request req;
122 if (pmu_request(&req, NULL, 3, PMU_READ_NVRAM,
123 (offset >> 8) & 0xFF, offset & 0xFF) < 0)
124 return 0;
125 while (!req.complete)
126 pmu_poll();
127 return req.reply[3];
130 static void pmu_write_pram(int offset, __u8 data)
132 struct adb_request req;
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();
139 #else
140 #define pmu_read_time() 0
141 #define pmu_write_time(n)
142 #define pmu_read_pram NULL
143 #define pmu_write_pram NULL
144 #endif
146 #if 0 /* def CONFIG_ADB_MACIISI */
147 extern int maciisi_request(struct adb_request *req,
148 void (*done)(struct adb_request *), int nbytes, ...);
150 static long maciisi_read_time(void)
152 struct adb_request req;
153 long time;
155 if (maciisi_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME))
156 return 0;
158 time = (req.reply[3] << 24) | (req.reply[4] << 16)
159 | (req.reply[5] << 8) | req.reply[6];
160 return time - RTC_OFFSET;
163 static void maciisi_write_time(long data)
165 struct adb_request req;
166 data += RTC_OFFSET;
167 maciisi_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME,
168 (data >> 24) & 0xFF, (data >> 16) & 0xFF,
169 (data >> 8) & 0xFF, data & 0xFF);
172 static __u8 maciisi_read_pram(int offset)
174 struct adb_request req;
175 if (maciisi_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
176 (offset >> 8) & 0xFF, offset & 0xFF))
177 return 0;
178 return req.reply[3];
181 static void maciisi_write_pram(int offset, __u8 data)
183 struct adb_request req;
184 maciisi_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
185 (offset >> 8) & 0xFF, offset & 0xFF, data);
187 #else
188 #define maciisi_read_time() 0
189 #define maciisi_write_time(n)
190 #define maciisi_read_pram NULL
191 #define maciisi_write_pram NULL
192 #endif
195 * VIA PRAM/RTC access routines
197 * Must be called with interrupts disabled and
198 * the RTC should be enabled.
201 static __u8 via_pram_readbyte(void)
203 int i,reg;
204 __u8 data;
206 reg = via1[vBufB] & ~VIA1B_vRTCClk;
208 /* Set the RTC data line to be an input. */
210 via1[vDirB] &= ~VIA1B_vRTCData;
212 /* The bits of the byte come out in MSB order */
214 data = 0;
215 for (i = 0 ; i < 8 ; i++) {
216 via1[vBufB] = reg;
217 via1[vBufB] = reg | VIA1B_vRTCClk;
218 data = (data << 1) | (via1[vBufB] & VIA1B_vRTCData);
221 /* Return RTC data line to output state */
223 via1[vDirB] |= VIA1B_vRTCData;
225 return data;
228 static void via_pram_writebyte(__u8 data)
230 int i,reg,bit;
232 reg = via1[vBufB] & ~(VIA1B_vRTCClk | VIA1B_vRTCData);
234 /* The bits of the byte go in in MSB order */
236 for (i = 0 ; i < 8 ; i++) {
237 bit = data & 0x80? 1 : 0;
238 data <<= 1;
239 via1[vBufB] = reg | bit;
240 via1[vBufB] = reg | bit | VIA1B_vRTCClk;
245 * Execute a VIA PRAM/RTC command. For read commands
246 * data should point to a one-byte buffer for the
247 * resulting data. For write commands it should point
248 * to the data byte to for the command.
250 * This function disables all interrupts while running.
253 static void via_pram_command(int command, __u8 *data)
255 unsigned long flags;
256 int is_read;
258 local_irq_save(flags);
260 /* Enable the RTC and make sure the strobe line is high */
262 via1[vBufB] = (via1[vBufB] | VIA1B_vRTCClk) & ~VIA1B_vRTCEnb;
264 if (command & 0xFF00) { /* extended (two-byte) command */
265 via_pram_writebyte((command & 0xFF00) >> 8);
266 via_pram_writebyte(command & 0xFF);
267 is_read = command & 0x8000;
268 } else { /* one-byte command */
269 via_pram_writebyte(command);
270 is_read = command & 0x80;
272 if (is_read) {
273 *data = via_pram_readbyte();
274 } else {
275 via_pram_writebyte(*data);
278 /* All done, disable the RTC */
280 via1[vBufB] |= VIA1B_vRTCEnb;
282 local_irq_restore(flags);
285 static __u8 via_read_pram(int offset)
287 return 0;
290 static void via_write_pram(int offset, __u8 data)
295 * Return the current time in seconds since January 1, 1904.
297 * This only works on machines with the VIA-based PRAM/RTC, which
298 * is basically any machine with Mac II-style ADB.
301 static long via_read_time(void)
303 union {
304 __u8 cdata[4];
305 long idata;
306 } result, last_result;
307 int count = 1;
309 via_pram_command(0x81, &last_result.cdata[3]);
310 via_pram_command(0x85, &last_result.cdata[2]);
311 via_pram_command(0x89, &last_result.cdata[1]);
312 via_pram_command(0x8D, &last_result.cdata[0]);
315 * The NetBSD guys say to loop until you get the same reading
316 * twice in a row.
319 while (1) {
320 via_pram_command(0x81, &result.cdata[3]);
321 via_pram_command(0x85, &result.cdata[2]);
322 via_pram_command(0x89, &result.cdata[1]);
323 via_pram_command(0x8D, &result.cdata[0]);
325 if (result.idata == last_result.idata)
326 return result.idata - RTC_OFFSET;
328 if (++count > 10)
329 break;
331 last_result.idata = result.idata;
334 pr_err("via_read_time: failed to read a stable value; "
335 "got 0x%08lx then 0x%08lx\n",
336 last_result.idata, result.idata);
338 return 0;
342 * Set the current time to a number of seconds since January 1, 1904.
344 * This only works on machines with the VIA-based PRAM/RTC, which
345 * is basically any machine with Mac II-style ADB.
348 static void via_write_time(long time)
350 union {
351 __u8 cdata[4];
352 long idata;
353 } data;
354 __u8 temp;
356 /* Clear the write protect bit */
358 temp = 0x55;
359 via_pram_command(0x35, &temp);
361 data.idata = time + RTC_OFFSET;
362 via_pram_command(0x01, &data.cdata[3]);
363 via_pram_command(0x05, &data.cdata[2]);
364 via_pram_command(0x09, &data.cdata[1]);
365 via_pram_command(0x0D, &data.cdata[0]);
367 /* Set the write protect bit */
369 temp = 0xD5;
370 via_pram_command(0x35, &temp);
373 static void via_shutdown(void)
375 if (rbv_present) {
376 via2[rBufB] &= ~0x04;
377 } else {
378 /* Direction of vDirB is output */
379 via2[vDirB] |= 0x04;
380 /* Send a value of 0 on that line */
381 via2[vBufB] &= ~0x04;
382 mdelay(1000);
387 * FIXME: not sure how this is supposed to work exactly...
390 static void oss_shutdown(void)
392 oss->rom_ctrl = OSS_POWEROFF;
395 #ifdef CONFIG_ADB_CUDA
397 static void cuda_restart(void)
399 struct adb_request req;
400 if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM) < 0)
401 return;
402 while (!req.complete)
403 cuda_poll();
406 static void cuda_shutdown(void)
408 struct adb_request req;
409 if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN) < 0)
410 return;
411 while (!req.complete)
412 cuda_poll();
415 #endif /* CONFIG_ADB_CUDA */
417 #ifdef CONFIG_ADB_PMU68K
419 void pmu_restart(void)
421 struct adb_request req;
422 if (pmu_request(&req, NULL,
423 2, PMU_SET_INTR_MASK, PMU_INT_ADB|PMU_INT_TICK) < 0)
424 return;
425 while (!req.complete)
426 pmu_poll();
427 if (pmu_request(&req, NULL, 1, PMU_RESET) < 0)
428 return;
429 while (!req.complete)
430 pmu_poll();
433 void pmu_shutdown(void)
435 struct adb_request req;
436 if (pmu_request(&req, NULL,
437 2, PMU_SET_INTR_MASK, PMU_INT_ADB|PMU_INT_TICK) < 0)
438 return;
439 while (!req.complete)
440 pmu_poll();
441 if (pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 'M', 'A', 'T', 'T') < 0)
442 return;
443 while (!req.complete)
444 pmu_poll();
447 #endif
450 *-------------------------------------------------------------------
451 * Below this point are the generic routines; they'll dispatch to the
452 * correct routine for the hardware on which we're running.
453 *-------------------------------------------------------------------
456 void mac_pram_read(int offset, __u8 *buffer, int len)
458 __u8 (*func)(int);
459 int i;
461 switch(macintosh_config->adb_type) {
462 case MAC_ADB_IISI:
463 func = maciisi_read_pram; break;
464 case MAC_ADB_PB1:
465 case MAC_ADB_PB2:
466 func = pmu_read_pram; break;
467 case MAC_ADB_CUDA:
468 func = cuda_read_pram; break;
469 default:
470 func = via_read_pram;
472 if (!func)
473 return;
474 for (i = 0 ; i < len ; i++) {
475 buffer[i] = (*func)(offset++);
479 void mac_pram_write(int offset, __u8 *buffer, int len)
481 void (*func)(int, __u8);
482 int i;
484 switch(macintosh_config->adb_type) {
485 case MAC_ADB_IISI:
486 func = maciisi_write_pram; break;
487 case MAC_ADB_PB1:
488 case MAC_ADB_PB2:
489 func = pmu_write_pram; break;
490 case MAC_ADB_CUDA:
491 func = cuda_write_pram; break;
492 default:
493 func = via_write_pram;
495 if (!func)
496 return;
497 for (i = 0 ; i < len ; i++) {
498 (*func)(offset++, buffer[i]);
502 void mac_poweroff(void)
505 * MAC_ADB_IISI may need to be moved up here if it doesn't actually
506 * work using the ADB packet method. --David Kilzer
509 if (oss_present) {
510 oss_shutdown();
511 } else if (macintosh_config->adb_type == MAC_ADB_II) {
512 via_shutdown();
513 #ifdef CONFIG_ADB_CUDA
514 } else if (macintosh_config->adb_type == MAC_ADB_CUDA) {
515 cuda_shutdown();
516 #endif
517 #ifdef CONFIG_ADB_PMU68K
518 } else if (macintosh_config->adb_type == MAC_ADB_PB1
519 || macintosh_config->adb_type == MAC_ADB_PB2) {
520 pmu_shutdown();
521 #endif
523 local_irq_enable();
524 printk("It is now safe to turn off your Macintosh.\n");
525 while(1);
528 void mac_reset(void)
530 if (macintosh_config->adb_type == MAC_ADB_II) {
531 unsigned long flags;
533 /* need ROMBASE in booter */
534 /* indeed, plus need to MAP THE ROM !! */
536 if (mac_bi_data.rombase == 0)
537 mac_bi_data.rombase = 0x40800000;
539 /* works on some */
540 rom_reset = (void *) (mac_bi_data.rombase + 0xa);
542 if (macintosh_config->ident == MAC_MODEL_SE30) {
544 * MSch: Machines known to crash on ROM reset ...
546 } else {
547 local_irq_save(flags);
549 rom_reset();
551 local_irq_restore(flags);
553 #ifdef CONFIG_ADB_CUDA
554 } else if (macintosh_config->adb_type == MAC_ADB_CUDA) {
555 cuda_restart();
556 #endif
557 #ifdef CONFIG_ADB_PMU68K
558 } else if (macintosh_config->adb_type == MAC_ADB_PB1
559 || macintosh_config->adb_type == MAC_ADB_PB2) {
560 pmu_restart();
561 #endif
562 } else if (CPU_IS_030) {
564 /* 030-specific reset routine. The idea is general, but the
565 * specific registers to reset are '030-specific. Until I
566 * have a non-030 machine, I can't test anything else.
567 * -- C. Scott Ananian <cananian@alumni.princeton.edu>
570 unsigned long rombase = 0x40000000;
572 /* make a 1-to-1 mapping, using the transparent tran. reg. */
573 unsigned long virt = (unsigned long) mac_reset;
574 unsigned long phys = virt_to_phys(mac_reset);
575 unsigned long addr = (phys&0xFF000000)|0x8777;
576 unsigned long offset = phys-virt;
577 local_irq_disable(); /* lets not screw this up, ok? */
578 __asm__ __volatile__(".chip 68030\n\t"
579 "pmove %0,%/tt0\n\t"
580 ".chip 68k"
581 : : "m" (addr));
582 /* Now jump to physical address so we can disable MMU */
583 __asm__ __volatile__(
584 ".chip 68030\n\t"
585 "lea %/pc@(1f),%/a0\n\t"
586 "addl %0,%/a0\n\t"/* fixup target address and stack ptr */
587 "addl %0,%/sp\n\t"
588 "pflusha\n\t"
589 "jmp %/a0@\n\t" /* jump into physical memory */
590 "0:.long 0\n\t" /* a constant zero. */
591 /* OK. Now reset everything and jump to reset vector. */
592 "1:\n\t"
593 "lea %/pc@(0b),%/a0\n\t"
594 "pmove %/a0@, %/tc\n\t" /* disable mmu */
595 "pmove %/a0@, %/tt0\n\t" /* disable tt0 */
596 "pmove %/a0@, %/tt1\n\t" /* disable tt1 */
597 "movel #0, %/a0\n\t"
598 "movec %/a0, %/vbr\n\t" /* clear vector base register */
599 "movec %/a0, %/cacr\n\t" /* disable caches */
600 "movel #0x0808,%/a0\n\t"
601 "movec %/a0, %/cacr\n\t" /* flush i&d caches */
602 "movew #0x2700,%/sr\n\t" /* set up status register */
603 "movel %1@(0x0),%/a0\n\t"/* load interrupt stack pointer */
604 "movec %/a0, %/isp\n\t"
605 "movel %1@(0x4),%/a0\n\t" /* load reset vector */
606 "reset\n\t" /* reset external devices */
607 "jmp %/a0@\n\t" /* jump to the reset vector */
608 ".chip 68k"
609 : : "r" (offset), "a" (rombase) : "a0");
612 /* should never get here */
613 local_irq_enable();
614 printk ("Restart failed. Please restart manually.\n");
615 while(1);
619 * This function translates seconds since 1970 into a proper date.
621 * Algorithm cribbed from glibc2.1, __offtime().
623 #define SECS_PER_MINUTE (60)
624 #define SECS_PER_HOUR (SECS_PER_MINUTE * 60)
625 #define SECS_PER_DAY (SECS_PER_HOUR * 24)
627 static void unmktime(unsigned long time, long offset,
628 int *yearp, int *monp, int *dayp,
629 int *hourp, int *minp, int *secp)
631 /* How many days come before each month (0-12). */
632 static const unsigned short int __mon_yday[2][13] =
634 /* Normal years. */
635 { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
636 /* Leap years. */
637 { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
639 long int days, rem, y, wday, yday;
640 const unsigned short int *ip;
642 days = time / SECS_PER_DAY;
643 rem = time % SECS_PER_DAY;
644 rem += offset;
645 while (rem < 0) {
646 rem += SECS_PER_DAY;
647 --days;
649 while (rem >= SECS_PER_DAY) {
650 rem -= SECS_PER_DAY;
651 ++days;
653 *hourp = rem / SECS_PER_HOUR;
654 rem %= SECS_PER_HOUR;
655 *minp = rem / SECS_PER_MINUTE;
656 *secp = rem % SECS_PER_MINUTE;
657 /* January 1, 1970 was a Thursday. */
658 wday = (4 + days) % 7; /* Day in the week. Not currently used */
659 if (wday < 0) wday += 7;
660 y = 1970;
662 #define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
663 #define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
664 #define __isleap(year) \
665 ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
667 while (days < 0 || days >= (__isleap (y) ? 366 : 365))
669 /* Guess a corrected year, assuming 365 days per year. */
670 long int yg = y + days / 365 - (days % 365 < 0);
672 /* Adjust DAYS and Y to match the guessed year. */
673 days -= ((yg - y) * 365
674 + LEAPS_THRU_END_OF (yg - 1)
675 - LEAPS_THRU_END_OF (y - 1));
676 y = yg;
678 *yearp = y - 1900;
679 yday = days; /* day in the year. Not currently used. */
680 ip = __mon_yday[__isleap(y)];
681 for (y = 11; days < (long int) ip[y]; --y)
682 continue;
683 days -= ip[y];
684 *monp = y;
685 *dayp = days + 1; /* day in the month */
686 return;
690 * Read/write the hardware clock.
693 int mac_hwclk(int op, struct rtc_time *t)
695 unsigned long now;
697 if (!op) { /* read */
698 switch (macintosh_config->adb_type) {
699 case MAC_ADB_II:
700 case MAC_ADB_IOP:
701 now = via_read_time();
702 break;
703 case MAC_ADB_IISI:
704 now = maciisi_read_time();
705 break;
706 case MAC_ADB_PB1:
707 case MAC_ADB_PB2:
708 now = pmu_read_time();
709 break;
710 case MAC_ADB_CUDA:
711 now = cuda_read_time();
712 break;
713 default:
714 now = 0;
717 t->tm_wday = 0;
718 unmktime(now, 0,
719 &t->tm_year, &t->tm_mon, &t->tm_mday,
720 &t->tm_hour, &t->tm_min, &t->tm_sec);
721 #if 0
722 printk("mac_hwclk: read %04d-%02d-%-2d %02d:%02d:%02d\n",
723 t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
724 t->tm_hour, t->tm_min, t->tm_sec);
725 #endif
726 } else { /* write */
727 #if 0
728 printk("mac_hwclk: tried to write %04d-%02d-%-2d %02d:%02d:%02d\n",
729 t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
730 t->tm_hour, t->tm_min, t->tm_sec);
731 #endif
733 now = mktime(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
734 t->tm_hour, t->tm_min, t->tm_sec);
736 switch (macintosh_config->adb_type) {
737 case MAC_ADB_II:
738 case MAC_ADB_IOP:
739 via_write_time(now);
740 break;
741 case MAC_ADB_CUDA:
742 cuda_write_time(now);
743 break;
744 case MAC_ADB_PB1:
745 case MAC_ADB_PB2:
746 pmu_write_time(now);
747 break;
748 case MAC_ADB_IISI:
749 maciisi_write_time(now);
752 return 0;
756 * Set minutes/seconds in the hardware clock
759 int mac_set_clock_mmss (unsigned long nowtime)
761 struct rtc_time now;
763 mac_hwclk(0, &now);
764 now.tm_sec = nowtime % 60;
765 now.tm_min = (nowtime / 60) % 60;
766 mac_hwclk(1, &now);
768 return 0;