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[linux/fpc-iii.git] / arch / m68k / mac / misc.c
blob0fb54a90eac273054ccb7dd618caf69c668e9fe4
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/segment.h>
22 #include <asm/setup.h>
23 #include <asm/macintosh.h>
24 #include <asm/mac_via.h>
25 #include <asm/mac_oss.h>
27 #include <asm/machdep.h>
29 /* Offset between Unix time (1970-based) and Mac time (1904-based) */
31 #define RTC_OFFSET 2082844800
33 static void (*rom_reset)(void);
35 #ifdef CONFIG_ADB_CUDA
36 static long cuda_read_time(void)
38 struct adb_request req;
39 long time;
41 if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME) < 0)
42 return 0;
43 while (!req.complete)
44 cuda_poll();
46 time = (req.reply[3] << 24) | (req.reply[4] << 16)
47 | (req.reply[5] << 8) | req.reply[6];
48 return time - RTC_OFFSET;
51 static void cuda_write_time(long data)
53 struct adb_request req;
54 data += RTC_OFFSET;
55 if (cuda_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME,
56 (data >> 24) & 0xFF, (data >> 16) & 0xFF,
57 (data >> 8) & 0xFF, data & 0xFF) < 0)
58 return;
59 while (!req.complete)
60 cuda_poll();
63 static __u8 cuda_read_pram(int offset)
65 struct adb_request req;
66 if (cuda_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
67 (offset >> 8) & 0xFF, offset & 0xFF) < 0)
68 return 0;
69 while (!req.complete)
70 cuda_poll();
71 return req.reply[3];
74 static void cuda_write_pram(int offset, __u8 data)
76 struct adb_request req;
77 if (cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
78 (offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
79 return;
80 while (!req.complete)
81 cuda_poll();
83 #else
84 #define cuda_read_time() 0
85 #define cuda_write_time(n)
86 #define cuda_read_pram NULL
87 #define cuda_write_pram NULL
88 #endif
90 #ifdef CONFIG_ADB_PMU68K
91 static long pmu_read_time(void)
93 struct adb_request req;
94 long time;
96 if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
97 return 0;
98 while (!req.complete)
99 pmu_poll();
101 time = (req.reply[1] << 24) | (req.reply[2] << 16)
102 | (req.reply[3] << 8) | req.reply[4];
103 return time - RTC_OFFSET;
106 static void pmu_write_time(long data)
108 struct adb_request req;
109 data += RTC_OFFSET;
110 if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
111 (data >> 24) & 0xFF, (data >> 16) & 0xFF,
112 (data >> 8) & 0xFF, data & 0xFF) < 0)
113 return;
114 while (!req.complete)
115 pmu_poll();
118 static __u8 pmu_read_pram(int offset)
120 struct adb_request req;
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];
129 static void pmu_write_pram(int offset, __u8 data)
131 struct adb_request req;
132 if (pmu_request(&req, NULL, 4, PMU_WRITE_NVRAM,
133 (offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
134 return;
135 while (!req.complete)
136 pmu_poll();
138 #else
139 #define pmu_read_time() 0
140 #define pmu_write_time(n)
141 #define pmu_read_pram NULL
142 #define pmu_write_pram NULL
143 #endif
145 #if 0 /* def CONFIG_ADB_MACIISI */
146 extern int maciisi_request(struct adb_request *req,
147 void (*done)(struct adb_request *), int nbytes, ...);
149 static long maciisi_read_time(void)
151 struct adb_request req;
152 long time;
154 if (maciisi_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME))
155 return 0;
157 time = (req.reply[3] << 24) | (req.reply[4] << 16)
158 | (req.reply[5] << 8) | req.reply[6];
159 return time - RTC_OFFSET;
162 static void maciisi_write_time(long data)
164 struct adb_request req;
165 data += RTC_OFFSET;
166 maciisi_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME,
167 (data >> 24) & 0xFF, (data >> 16) & 0xFF,
168 (data >> 8) & 0xFF, data & 0xFF);
171 static __u8 maciisi_read_pram(int offset)
173 struct adb_request req;
174 if (maciisi_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
175 (offset >> 8) & 0xFF, offset & 0xFF))
176 return 0;
177 return req.reply[3];
180 static void maciisi_write_pram(int offset, __u8 data)
182 struct adb_request req;
183 maciisi_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
184 (offset >> 8) & 0xFF, offset & 0xFF, data);
186 #else
187 #define maciisi_read_time() 0
188 #define maciisi_write_time(n)
189 #define maciisi_read_pram NULL
190 #define maciisi_write_pram NULL
191 #endif
194 * VIA PRAM/RTC access routines
196 * Must be called with interrupts disabled and
197 * the RTC should be enabled.
200 static __u8 via_pram_readbyte(void)
202 int i,reg;
203 __u8 data;
205 reg = via1[vBufB] & ~VIA1B_vRTCClk;
207 /* Set the RTC data line to be an input. */
209 via1[vDirB] &= ~VIA1B_vRTCData;
211 /* The bits of the byte come out in MSB order */
213 data = 0;
214 for (i = 0 ; i < 8 ; i++) {
215 via1[vBufB] = reg;
216 via1[vBufB] = reg | VIA1B_vRTCClk;
217 data = (data << 1) | (via1[vBufB] & VIA1B_vRTCData);
220 /* Return RTC data line to output state */
222 via1[vDirB] |= VIA1B_vRTCData;
224 return data;
227 static void via_pram_writebyte(__u8 data)
229 int i,reg,bit;
231 reg = via1[vBufB] & ~(VIA1B_vRTCClk | VIA1B_vRTCData);
233 /* The bits of the byte go in in MSB order */
235 for (i = 0 ; i < 8 ; i++) {
236 bit = data & 0x80? 1 : 0;
237 data <<= 1;
238 via1[vBufB] = reg | bit;
239 via1[vBufB] = reg | bit | VIA1B_vRTCClk;
244 * Execute a VIA PRAM/RTC command. For read commands
245 * data should point to a one-byte buffer for the
246 * resulting data. For write commands it should point
247 * to the data byte to for the command.
249 * This function disables all interrupts while running.
252 static void via_pram_command(int command, __u8 *data)
254 unsigned long flags;
255 int is_read;
257 local_irq_save(flags);
259 /* Enable the RTC and make sure the strobe line is high */
261 via1[vBufB] = (via1[vBufB] | VIA1B_vRTCClk) & ~VIA1B_vRTCEnb;
263 if (command & 0xFF00) { /* extended (two-byte) command */
264 via_pram_writebyte((command & 0xFF00) >> 8);
265 via_pram_writebyte(command & 0xFF);
266 is_read = command & 0x8000;
267 } else { /* one-byte command */
268 via_pram_writebyte(command);
269 is_read = command & 0x80;
271 if (is_read) {
272 *data = via_pram_readbyte();
273 } else {
274 via_pram_writebyte(*data);
277 /* All done, disable the RTC */
279 via1[vBufB] |= VIA1B_vRTCEnb;
281 local_irq_restore(flags);
284 static __u8 via_read_pram(int offset)
286 return 0;
289 static void via_write_pram(int offset, __u8 data)
294 * Return the current time in seconds since January 1, 1904.
296 * This only works on machines with the VIA-based PRAM/RTC, which
297 * is basically any machine with Mac II-style ADB.
300 static long via_read_time(void)
302 union {
303 __u8 cdata[4];
304 long idata;
305 } result, last_result;
306 int count = 1;
308 via_pram_command(0x81, &last_result.cdata[3]);
309 via_pram_command(0x85, &last_result.cdata[2]);
310 via_pram_command(0x89, &last_result.cdata[1]);
311 via_pram_command(0x8D, &last_result.cdata[0]);
314 * The NetBSD guys say to loop until you get the same reading
315 * twice in a row.
318 while (1) {
319 via_pram_command(0x81, &result.cdata[3]);
320 via_pram_command(0x85, &result.cdata[2]);
321 via_pram_command(0x89, &result.cdata[1]);
322 via_pram_command(0x8D, &result.cdata[0]);
324 if (result.idata == last_result.idata)
325 return result.idata - RTC_OFFSET;
327 if (++count > 10)
328 break;
330 last_result.idata = result.idata;
333 pr_err("via_read_time: failed to read a stable value; "
334 "got 0x%08lx then 0x%08lx\n",
335 last_result.idata, result.idata);
337 return 0;
341 * Set the current time to a number of seconds since January 1, 1904.
343 * This only works on machines with the VIA-based PRAM/RTC, which
344 * is basically any machine with Mac II-style ADB.
347 static void via_write_time(long time)
349 union {
350 __u8 cdata[4];
351 long idata;
352 } data;
353 __u8 temp;
355 /* Clear the write protect bit */
357 temp = 0x55;
358 via_pram_command(0x35, &temp);
360 data.idata = time + RTC_OFFSET;
361 via_pram_command(0x01, &data.cdata[3]);
362 via_pram_command(0x05, &data.cdata[2]);
363 via_pram_command(0x09, &data.cdata[1]);
364 via_pram_command(0x0D, &data.cdata[0]);
366 /* Set the write protect bit */
368 temp = 0xD5;
369 via_pram_command(0x35, &temp);
372 static void via_shutdown(void)
374 if (rbv_present) {
375 via2[rBufB] &= ~0x04;
376 } else {
377 /* Direction of vDirB is output */
378 via2[vDirB] |= 0x04;
379 /* Send a value of 0 on that line */
380 via2[vBufB] &= ~0x04;
381 mdelay(1000);
386 * FIXME: not sure how this is supposed to work exactly...
389 static void oss_shutdown(void)
391 oss->rom_ctrl = OSS_POWEROFF;
394 #ifdef CONFIG_ADB_CUDA
396 static void cuda_restart(void)
398 struct adb_request req;
399 if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM) < 0)
400 return;
401 while (!req.complete)
402 cuda_poll();
405 static void cuda_shutdown(void)
407 struct adb_request req;
408 if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN) < 0)
409 return;
410 while (!req.complete)
411 cuda_poll();
414 #endif /* CONFIG_ADB_CUDA */
416 #ifdef CONFIG_ADB_PMU68K
418 void pmu_restart(void)
420 struct adb_request req;
421 if (pmu_request(&req, NULL,
422 2, PMU_SET_INTR_MASK, PMU_INT_ADB|PMU_INT_TICK) < 0)
423 return;
424 while (!req.complete)
425 pmu_poll();
426 if (pmu_request(&req, NULL, 1, PMU_RESET) < 0)
427 return;
428 while (!req.complete)
429 pmu_poll();
432 void pmu_shutdown(void)
434 struct adb_request req;
435 if (pmu_request(&req, NULL,
436 2, PMU_SET_INTR_MASK, PMU_INT_ADB|PMU_INT_TICK) < 0)
437 return;
438 while (!req.complete)
439 pmu_poll();
440 if (pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 'M', 'A', 'T', 'T') < 0)
441 return;
442 while (!req.complete)
443 pmu_poll();
446 #endif
449 *-------------------------------------------------------------------
450 * Below this point are the generic routines; they'll dispatch to the
451 * correct routine for the hardware on which we're running.
452 *-------------------------------------------------------------------
455 void mac_pram_read(int offset, __u8 *buffer, int len)
457 __u8 (*func)(int);
458 int i;
460 switch(macintosh_config->adb_type) {
461 case MAC_ADB_IISI:
462 func = maciisi_read_pram; break;
463 case MAC_ADB_PB1:
464 case MAC_ADB_PB2:
465 func = pmu_read_pram; break;
466 case MAC_ADB_CUDA:
467 func = cuda_read_pram; break;
468 default:
469 func = via_read_pram;
471 if (!func)
472 return;
473 for (i = 0 ; i < len ; i++) {
474 buffer[i] = (*func)(offset++);
478 void mac_pram_write(int offset, __u8 *buffer, int len)
480 void (*func)(int, __u8);
481 int i;
483 switch(macintosh_config->adb_type) {
484 case MAC_ADB_IISI:
485 func = maciisi_write_pram; break;
486 case MAC_ADB_PB1:
487 case MAC_ADB_PB2:
488 func = pmu_write_pram; break;
489 case MAC_ADB_CUDA:
490 func = cuda_write_pram; break;
491 default:
492 func = via_write_pram;
494 if (!func)
495 return;
496 for (i = 0 ; i < len ; i++) {
497 (*func)(offset++, buffer[i]);
501 void mac_poweroff(void)
504 * MAC_ADB_IISI may need to be moved up here if it doesn't actually
505 * work using the ADB packet method. --David Kilzer
508 if (oss_present) {
509 oss_shutdown();
510 } else if (macintosh_config->adb_type == MAC_ADB_II) {
511 via_shutdown();
512 #ifdef CONFIG_ADB_CUDA
513 } else if (macintosh_config->adb_type == MAC_ADB_CUDA) {
514 cuda_shutdown();
515 #endif
516 #ifdef CONFIG_ADB_PMU68K
517 } else if (macintosh_config->adb_type == MAC_ADB_PB1
518 || macintosh_config->adb_type == MAC_ADB_PB2) {
519 pmu_shutdown();
520 #endif
522 local_irq_enable();
523 printk("It is now safe to turn off your Macintosh.\n");
524 while(1);
527 void mac_reset(void)
529 if (macintosh_config->adb_type == MAC_ADB_II) {
530 unsigned long flags;
532 /* need ROMBASE in booter */
533 /* indeed, plus need to MAP THE ROM !! */
535 if (mac_bi_data.rombase == 0)
536 mac_bi_data.rombase = 0x40800000;
538 /* works on some */
539 rom_reset = (void *) (mac_bi_data.rombase + 0xa);
541 if (macintosh_config->ident == MAC_MODEL_SE30) {
543 * MSch: Machines known to crash on ROM reset ...
545 } else {
546 local_irq_save(flags);
548 rom_reset();
550 local_irq_restore(flags);
552 #ifdef CONFIG_ADB_CUDA
553 } else if (macintosh_config->adb_type == MAC_ADB_CUDA) {
554 cuda_restart();
555 #endif
556 #ifdef CONFIG_ADB_PMU68K
557 } else if (macintosh_config->adb_type == MAC_ADB_PB1
558 || macintosh_config->adb_type == MAC_ADB_PB2) {
559 pmu_restart();
560 #endif
561 } else if (CPU_IS_030) {
563 /* 030-specific reset routine. The idea is general, but the
564 * specific registers to reset are '030-specific. Until I
565 * have a non-030 machine, I can't test anything else.
566 * -- C. Scott Ananian <cananian@alumni.princeton.edu>
569 unsigned long rombase = 0x40000000;
571 /* make a 1-to-1 mapping, using the transparent tran. reg. */
572 unsigned long virt = (unsigned long) mac_reset;
573 unsigned long phys = virt_to_phys(mac_reset);
574 unsigned long addr = (phys&0xFF000000)|0x8777;
575 unsigned long offset = phys-virt;
576 local_irq_disable(); /* lets not screw this up, ok? */
577 __asm__ __volatile__(".chip 68030\n\t"
578 "pmove %0,%/tt0\n\t"
579 ".chip 68k"
580 : : "m" (addr));
581 /* Now jump to physical address so we can disable MMU */
582 __asm__ __volatile__(
583 ".chip 68030\n\t"
584 "lea %/pc@(1f),%/a0\n\t"
585 "addl %0,%/a0\n\t"/* fixup target address and stack ptr */
586 "addl %0,%/sp\n\t"
587 "pflusha\n\t"
588 "jmp %/a0@\n\t" /* jump into physical memory */
589 "0:.long 0\n\t" /* a constant zero. */
590 /* OK. Now reset everything and jump to reset vector. */
591 "1:\n\t"
592 "lea %/pc@(0b),%/a0\n\t"
593 "pmove %/a0@, %/tc\n\t" /* disable mmu */
594 "pmove %/a0@, %/tt0\n\t" /* disable tt0 */
595 "pmove %/a0@, %/tt1\n\t" /* disable tt1 */
596 "movel #0, %/a0\n\t"
597 "movec %/a0, %/vbr\n\t" /* clear vector base register */
598 "movec %/a0, %/cacr\n\t" /* disable caches */
599 "movel #0x0808,%/a0\n\t"
600 "movec %/a0, %/cacr\n\t" /* flush i&d caches */
601 "movew #0x2700,%/sr\n\t" /* set up status register */
602 "movel %1@(0x0),%/a0\n\t"/* load interrupt stack pointer */
603 "movec %/a0, %/isp\n\t"
604 "movel %1@(0x4),%/a0\n\t" /* load reset vector */
605 "reset\n\t" /* reset external devices */
606 "jmp %/a0@\n\t" /* jump to the reset vector */
607 ".chip 68k"
608 : : "r" (offset), "a" (rombase) : "a0");
611 /* should never get here */
612 local_irq_enable();
613 printk ("Restart failed. Please restart manually.\n");
614 while(1);
618 * This function translates seconds since 1970 into a proper date.
620 * Algorithm cribbed from glibc2.1, __offtime().
622 #define SECS_PER_MINUTE (60)
623 #define SECS_PER_HOUR (SECS_PER_MINUTE * 60)
624 #define SECS_PER_DAY (SECS_PER_HOUR * 24)
626 static void unmktime(unsigned long time, long offset,
627 int *yearp, int *monp, int *dayp,
628 int *hourp, int *minp, int *secp)
630 /* How many days come before each month (0-12). */
631 static const unsigned short int __mon_yday[2][13] =
633 /* Normal years. */
634 { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
635 /* Leap years. */
636 { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
638 long int days, rem, y, wday, yday;
639 const unsigned short int *ip;
641 days = time / SECS_PER_DAY;
642 rem = time % SECS_PER_DAY;
643 rem += offset;
644 while (rem < 0) {
645 rem += SECS_PER_DAY;
646 --days;
648 while (rem >= SECS_PER_DAY) {
649 rem -= SECS_PER_DAY;
650 ++days;
652 *hourp = rem / SECS_PER_HOUR;
653 rem %= SECS_PER_HOUR;
654 *minp = rem / SECS_PER_MINUTE;
655 *secp = rem % SECS_PER_MINUTE;
656 /* January 1, 1970 was a Thursday. */
657 wday = (4 + days) % 7; /* Day in the week. Not currently used */
658 if (wday < 0) wday += 7;
659 y = 1970;
661 #define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
662 #define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
663 #define __isleap(year) \
664 ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
666 while (days < 0 || days >= (__isleap (y) ? 366 : 365))
668 /* Guess a corrected year, assuming 365 days per year. */
669 long int yg = y + days / 365 - (days % 365 < 0);
671 /* Adjust DAYS and Y to match the guessed year. */
672 days -= ((yg - y) * 365
673 + LEAPS_THRU_END_OF (yg - 1)
674 - LEAPS_THRU_END_OF (y - 1));
675 y = yg;
677 *yearp = y - 1900;
678 yday = days; /* day in the year. Not currently used. */
679 ip = __mon_yday[__isleap(y)];
680 for (y = 11; days < (long int) ip[y]; --y)
681 continue;
682 days -= ip[y];
683 *monp = y;
684 *dayp = days + 1; /* day in the month */
685 return;
689 * Read/write the hardware clock.
692 int mac_hwclk(int op, struct rtc_time *t)
694 unsigned long now;
696 if (!op) { /* read */
697 switch (macintosh_config->adb_type) {
698 case MAC_ADB_II:
699 case MAC_ADB_IOP:
700 now = via_read_time();
701 break;
702 case MAC_ADB_IISI:
703 now = maciisi_read_time();
704 break;
705 case MAC_ADB_PB1:
706 case MAC_ADB_PB2:
707 now = pmu_read_time();
708 break;
709 case MAC_ADB_CUDA:
710 now = cuda_read_time();
711 break;
712 default:
713 now = 0;
716 t->tm_wday = 0;
717 unmktime(now, 0,
718 &t->tm_year, &t->tm_mon, &t->tm_mday,
719 &t->tm_hour, &t->tm_min, &t->tm_sec);
720 #if 0
721 printk("mac_hwclk: read %04d-%02d-%-2d %02d:%02d:%02d\n",
722 t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
723 t->tm_hour, t->tm_min, t->tm_sec);
724 #endif
725 } else { /* write */
726 #if 0
727 printk("mac_hwclk: tried to write %04d-%02d-%-2d %02d:%02d:%02d\n",
728 t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
729 t->tm_hour, t->tm_min, t->tm_sec);
730 #endif
732 now = mktime(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
733 t->tm_hour, t->tm_min, t->tm_sec);
735 switch (macintosh_config->adb_type) {
736 case MAC_ADB_II:
737 case MAC_ADB_IOP:
738 via_write_time(now);
739 break;
740 case MAC_ADB_CUDA:
741 cuda_write_time(now);
742 break;
743 case MAC_ADB_PB1:
744 case MAC_ADB_PB2:
745 pmu_write_time(now);
746 break;
747 case MAC_ADB_IISI:
748 maciisi_write_time(now);
751 return 0;
755 * Set minutes/seconds in the hardware clock
758 int mac_set_clock_mmss (unsigned long nowtime)
760 struct rtc_time now;
762 mac_hwclk(0, &now);
763 now.tm_sec = nowtime % 60;
764 now.tm_min = (nowtime / 60) % 60;
765 mac_hwclk(1, &now);
767 return 0;