aboutsummaryrefslogtreecommitdiffstats
path: root/arch/m68k/mac/misc.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/m68k/mac/misc.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/m68k/mac/misc.c')
-rw-r--r--arch/m68k/mac/misc.c651
1 files changed, 651 insertions, 0 deletions
diff --git a/arch/m68k/mac/misc.c b/arch/m68k/mac/misc.c
new file mode 100644
index 000000000000..5b80d7cd954a
--- /dev/null
+++ b/arch/m68k/mac/misc.c
@@ -0,0 +1,651 @@
1/*
2 * Miscellaneous Mac68K-specific stuff
3 */
4
5#include <linux/config.h>
6#include <linux/types.h>
7#include <linux/errno.h>
8#include <linux/miscdevice.h>
9#include <linux/kernel.h>
10#include <linux/delay.h>
11#include <linux/sched.h>
12#include <linux/slab.h>
13#include <linux/time.h>
14#include <linux/rtc.h>
15#include <linux/mm.h>
16
17#include <linux/adb.h>
18#include <linux/cuda.h>
19#include <linux/pmu.h>
20
21#include <asm/uaccess.h>
22#include <asm/io.h>
23#include <asm/rtc.h>
24#include <asm/system.h>
25#include <asm/segment.h>
26#include <asm/setup.h>
27#include <asm/macintosh.h>
28#include <asm/mac_via.h>
29#include <asm/mac_oss.h>
30
31#define BOOTINFO_COMPAT_1_0
32#include <asm/bootinfo.h>
33#include <asm/machdep.h>
34
35/* Offset between Unix time (1970-based) and Mac time (1904-based) */
36
37#define RTC_OFFSET 2082844800
38
39extern struct mac_booter_data mac_bi_data;
40static void (*rom_reset)(void);
41
42#ifdef CONFIG_ADB
43/*
44 * Return the current time as the number of seconds since January 1, 1904.
45 */
46
47static long adb_read_time(void)
48{
49 volatile struct adb_request req;
50 long time;
51
52 adb_request((struct adb_request *) &req, NULL,
53 ADBREQ_RAW|ADBREQ_SYNC,
54 2, CUDA_PACKET, CUDA_GET_TIME);
55
56 time = (req.reply[3] << 24) | (req.reply[4] << 16)
57 | (req.reply[5] << 8) | req.reply[6];
58 return time - RTC_OFFSET;
59}
60
61/*
62 * Set the current system time
63 */
64
65static void adb_write_time(long data)
66{
67 volatile struct adb_request req;
68
69 data += RTC_OFFSET;
70
71 adb_request((struct adb_request *) &req, NULL,
72 ADBREQ_RAW|ADBREQ_SYNC,
73 6, CUDA_PACKET, CUDA_SET_TIME,
74 (data >> 24) & 0xFF, (data >> 16) & 0xFF,
75 (data >> 8) & 0xFF, data & 0xFF);
76}
77
78/*
79 * Get a byte from the NVRAM
80 */
81
82static __u8 adb_read_pram(int offset)
83{
84 volatile struct adb_request req;
85
86 adb_request((struct adb_request *) &req, NULL,
87 ADBREQ_RAW|ADBREQ_SYNC,
88 4, CUDA_PACKET, CUDA_GET_PRAM,
89 (offset >> 8) & 0xFF, offset & 0xFF);
90 return req.reply[3];
91}
92
93/*
94 * Write a byte to the NVRAM
95 */
96
97static void adb_write_pram(int offset, __u8 data)
98{
99 volatile struct adb_request req;
100
101 adb_request((struct adb_request *) &req, NULL,
102 ADBREQ_RAW|ADBREQ_SYNC,
103 5, CUDA_PACKET, CUDA_SET_PRAM,
104 (offset >> 8) & 0xFF, offset & 0xFF,
105 data);
106}
107#endif /* CONFIG_ADB */
108
109/*
110 * VIA PRAM/RTC access routines
111 *
112 * Must be called with interrupts disabled and
113 * the RTC should be enabled.
114 */
115
116static __u8 via_pram_readbyte(void)
117{
118 int i,reg;
119 __u8 data;
120
121 reg = via1[vBufB] & ~VIA1B_vRTCClk;
122
123 /* Set the RTC data line to be an input. */
124
125 via1[vDirB] &= ~VIA1B_vRTCData;
126
127 /* The bits of the byte come out in MSB order */
128
129 data = 0;
130 for (i = 0 ; i < 8 ; i++) {
131 via1[vBufB] = reg;
132 via1[vBufB] = reg | VIA1B_vRTCClk;
133 data = (data << 1) | (via1[vBufB] & VIA1B_vRTCData);
134 }
135
136 /* Return RTC data line to output state */
137
138 via1[vDirB] |= VIA1B_vRTCData;
139
140 return data;
141}
142
143static void via_pram_writebyte(__u8 data)
144{
145 int i,reg,bit;
146
147 reg = via1[vBufB] & ~(VIA1B_vRTCClk | VIA1B_vRTCData);
148
149 /* The bits of the byte go in in MSB order */
150
151 for (i = 0 ; i < 8 ; i++) {
152 bit = data & 0x80? 1 : 0;
153 data <<= 1;
154 via1[vBufB] = reg | bit;
155 via1[vBufB] = reg | bit | VIA1B_vRTCClk;
156 }
157}
158
159/*
160 * Execute a VIA PRAM/RTC command. For read commands
161 * data should point to a one-byte buffer for the
162 * resulting data. For write commands it should point
163 * to the data byte to for the command.
164 *
165 * This function disables all interrupts while running.
166 */
167
168static void via_pram_command(int command, __u8 *data)
169{
170 unsigned long flags;
171 int is_read;
172
173 local_irq_save(flags);
174
175 /* Enable the RTC and make sure the strobe line is high */
176
177 via1[vBufB] = (via1[vBufB] | VIA1B_vRTCClk) & ~VIA1B_vRTCEnb;
178
179 if (command & 0xFF00) { /* extended (two-byte) command */
180 via_pram_writebyte((command & 0xFF00) >> 8);
181 via_pram_writebyte(command & 0xFF);
182 is_read = command & 0x8000;
183 } else { /* one-byte command */
184 via_pram_writebyte(command);
185 is_read = command & 0x80;
186 }
187 if (is_read) {
188 *data = via_pram_readbyte();
189 } else {
190 via_pram_writebyte(*data);
191 }
192
193 /* All done, disable the RTC */
194
195 via1[vBufB] |= VIA1B_vRTCEnb;
196
197 local_irq_restore(flags);
198}
199
200static __u8 via_read_pram(int offset)
201{
202 return 0;
203}
204
205static void via_write_pram(int offset, __u8 data)
206{
207}
208
209/*
210 * Return the current time in seconds since January 1, 1904.
211 *
212 * This only works on machines with the VIA-based PRAM/RTC, which
213 * is basically any machine with Mac II-style ADB.
214 */
215
216static long via_read_time(void)
217{
218 union {
219 __u8 cdata[4];
220 long idata;
221 } result, last_result;
222 int ct;
223
224 /*
225 * The NetBSD guys say to loop until you get the same reading
226 * twice in a row.
227 */
228
229 ct = 0;
230 do {
231 if (++ct > 10) {
232 printk("via_read_time: couldn't get valid time, "
233 "last read = 0x%08lx and 0x%08lx\n",
234 last_result.idata, result.idata);
235 break;
236 }
237
238 last_result.idata = result.idata;
239 result.idata = 0;
240
241 via_pram_command(0x81, &result.cdata[3]);
242 via_pram_command(0x85, &result.cdata[2]);
243 via_pram_command(0x89, &result.cdata[1]);
244 via_pram_command(0x8D, &result.cdata[0]);
245 } while (result.idata != last_result.idata);
246
247 return result.idata - RTC_OFFSET;
248}
249
250/*
251 * Set the current time to a number of seconds since January 1, 1904.
252 *
253 * This only works on machines with the VIA-based PRAM/RTC, which
254 * is basically any machine with Mac II-style ADB.
255 */
256
257static void via_write_time(long time)
258{
259 union {
260 __u8 cdata[4];
261 long idata;
262 } data;
263 __u8 temp;
264
265 /* Clear the write protect bit */
266
267 temp = 0x55;
268 via_pram_command(0x35, &temp);
269
270 data.idata = time + RTC_OFFSET;
271 via_pram_command(0x01, &data.cdata[3]);
272 via_pram_command(0x05, &data.cdata[2]);
273 via_pram_command(0x09, &data.cdata[1]);
274 via_pram_command(0x0D, &data.cdata[0]);
275
276 /* Set the write protect bit */
277
278 temp = 0xD5;
279 via_pram_command(0x35, &temp);
280}
281
282static void via_shutdown(void)
283{
284 if (rbv_present) {
285 via2[rBufB] &= ~0x04;
286 } else {
287 /* Direction of vDirB is output */
288 via2[vDirB] |= 0x04;
289 /* Send a value of 0 on that line */
290 via2[vBufB] &= ~0x04;
291 mdelay(1000);
292 }
293}
294
295/*
296 * FIXME: not sure how this is supposed to work exactly...
297 */
298
299static void oss_shutdown(void)
300{
301 oss->rom_ctrl = OSS_POWEROFF;
302}
303
304#ifdef CONFIG_ADB_CUDA
305
306static void cuda_restart(void)
307{
308 adb_request(NULL, NULL, ADBREQ_RAW|ADBREQ_SYNC,
309 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
310}
311
312static void cuda_shutdown(void)
313{
314 adb_request(NULL, NULL, ADBREQ_RAW|ADBREQ_SYNC,
315 2, CUDA_PACKET, CUDA_POWERDOWN);
316}
317
318#endif /* CONFIG_ADB_CUDA */
319
320#ifdef CONFIG_ADB_PMU
321
322void pmu_restart(void)
323{
324 adb_request(NULL, NULL, ADBREQ_RAW|ADBREQ_SYNC,
325 3, PMU_PACKET, PMU_SET_INTR_MASK,
326 PMU_INT_ADB|PMU_INT_TICK);
327
328 adb_request(NULL, NULL, ADBREQ_RAW|ADBREQ_SYNC,
329 2, PMU_PACKET, PMU_RESET);
330}
331
332void pmu_shutdown(void)
333{
334 adb_request(NULL, NULL, ADBREQ_RAW|ADBREQ_SYNC,
335 3, PMU_PACKET, PMU_SET_INTR_MASK,
336 PMU_INT_ADB|PMU_INT_TICK);
337
338 adb_request(NULL, NULL, ADBREQ_RAW|ADBREQ_SYNC,
339 6, PMU_PACKET, PMU_SHUTDOWN,
340 'M', 'A', 'T', 'T');
341}
342
343#endif /* CONFIG_ADB_PMU */
344
345/*
346 *-------------------------------------------------------------------
347 * Below this point are the generic routines; they'll dispatch to the
348 * correct routine for the hardware on which we're running.
349 *-------------------------------------------------------------------
350 */
351
352void mac_pram_read(int offset, __u8 *buffer, int len)
353{
354 __u8 (*func)(int) = NULL;
355 int i;
356
357 if (macintosh_config->adb_type == MAC_ADB_IISI ||
358 macintosh_config->adb_type == MAC_ADB_PB1 ||
359 macintosh_config->adb_type == MAC_ADB_PB2 ||
360 macintosh_config->adb_type == MAC_ADB_CUDA) {
361#ifdef CONFIG_ADB
362 func = adb_read_pram;
363#else
364 return;
365#endif
366 } else {
367 func = via_read_pram;
368 }
369 for (i = 0 ; i < len ; i++) {
370 buffer[i] = (*func)(offset++);
371 }
372}
373
374void mac_pram_write(int offset, __u8 *buffer, int len)
375{
376 void (*func)(int, __u8) = NULL;
377 int i;
378
379 if (macintosh_config->adb_type == MAC_ADB_IISI ||
380 macintosh_config->adb_type == MAC_ADB_PB1 ||
381 macintosh_config->adb_type == MAC_ADB_PB2 ||
382 macintosh_config->adb_type == MAC_ADB_CUDA) {
383#ifdef CONFIG_ADB
384 func = adb_write_pram;
385#else
386 return;
387#endif
388 } else {
389 func = via_write_pram;
390 }
391 for (i = 0 ; i < len ; i++) {
392 (*func)(offset++, buffer[i]);
393 }
394}
395
396void mac_poweroff(void)
397{
398 /*
399 * MAC_ADB_IISI may need to be moved up here if it doesn't actually
400 * work using the ADB packet method. --David Kilzer
401 */
402
403 if (oss_present) {
404 oss_shutdown();
405 } else if (macintosh_config->adb_type == MAC_ADB_II) {
406 via_shutdown();
407#ifdef CONFIG_ADB_CUDA
408 } else if (macintosh_config->adb_type == MAC_ADB_CUDA) {
409 cuda_shutdown();
410#endif
411#ifdef CONFIG_ADB_PMU
412 } else if (macintosh_config->adb_type == MAC_ADB_PB1
413 || macintosh_config->adb_type == MAC_ADB_PB2) {
414 pmu_shutdown();
415#endif
416 }
417 local_irq_enable();
418 printk("It is now safe to turn off your Macintosh.\n");
419 while(1);
420}
421
422void mac_reset(void)
423{
424 if (macintosh_config->adb_type == MAC_ADB_II) {
425 unsigned long flags;
426
427 /* need ROMBASE in booter */
428 /* indeed, plus need to MAP THE ROM !! */
429
430 if (mac_bi_data.rombase == 0)
431 mac_bi_data.rombase = 0x40800000;
432
433 /* works on some */
434 rom_reset = (void *) (mac_bi_data.rombase + 0xa);
435
436 if (macintosh_config->ident == MAC_MODEL_SE30) {
437 /*
438 * MSch: Machines known to crash on ROM reset ...
439 */
440 } else {
441 local_irq_save(flags);
442
443 rom_reset();
444
445 local_irq_restore(flags);
446 }
447#ifdef CONFIG_ADB_CUDA
448 } else if (macintosh_config->adb_type == MAC_ADB_CUDA) {
449 cuda_restart();
450#endif
451#ifdef CONFIG_ADB_PMU
452 } else if (macintosh_config->adb_type == MAC_ADB_PB1
453 || macintosh_config->adb_type == MAC_ADB_PB2) {
454 pmu_restart();
455#endif
456 } else if (CPU_IS_030) {
457
458 /* 030-specific reset routine. The idea is general, but the
459 * specific registers to reset are '030-specific. Until I
460 * have a non-030 machine, I can't test anything else.
461 * -- C. Scott Ananian <cananian@alumni.princeton.edu>
462 */
463
464 unsigned long rombase = 0x40000000;
465
466 /* make a 1-to-1 mapping, using the transparent tran. reg. */
467 unsigned long virt = (unsigned long) mac_reset;
468 unsigned long phys = virt_to_phys(mac_reset);
469 unsigned long offset = phys-virt;
470 local_irq_disable(); /* lets not screw this up, ok? */
471 __asm__ __volatile__(".chip 68030\n\t"
472 "pmove %0,%/tt0\n\t"
473 ".chip 68k"
474 : : "m" ((phys&0xFF000000)|0x8777));
475 /* Now jump to physical address so we can disable MMU */
476 __asm__ __volatile__(
477 ".chip 68030\n\t"
478 "lea %/pc@(1f),%/a0\n\t"
479 "addl %0,%/a0\n\t"/* fixup target address and stack ptr */
480 "addl %0,%/sp\n\t"
481 "pflusha\n\t"
482 "jmp %/a0@\n\t" /* jump into physical memory */
483 "0:.long 0\n\t" /* a constant zero. */
484 /* OK. Now reset everything and jump to reset vector. */
485 "1:\n\t"
486 "lea %/pc@(0b),%/a0\n\t"
487 "pmove %/a0@, %/tc\n\t" /* disable mmu */
488 "pmove %/a0@, %/tt0\n\t" /* disable tt0 */
489 "pmove %/a0@, %/tt1\n\t" /* disable tt1 */
490 "movel #0, %/a0\n\t"
491 "movec %/a0, %/vbr\n\t" /* clear vector base register */
492 "movec %/a0, %/cacr\n\t" /* disable caches */
493 "movel #0x0808,%/a0\n\t"
494 "movec %/a0, %/cacr\n\t" /* flush i&d caches */
495 "movew #0x2700,%/sr\n\t" /* set up status register */
496 "movel %1@(0x0),%/a0\n\t"/* load interrupt stack pointer */
497 "movec %/a0, %/isp\n\t"
498 "movel %1@(0x4),%/a0\n\t" /* load reset vector */
499 "reset\n\t" /* reset external devices */
500 "jmp %/a0@\n\t" /* jump to the reset vector */
501 ".chip 68k"
502 : : "r" (offset), "a" (rombase) : "a0");
503 }
504
505 /* should never get here */
506 local_irq_enable();
507 printk ("Restart failed. Please restart manually.\n");
508 while(1);
509}
510
511/*
512 * This function translates seconds since 1970 into a proper date.
513 *
514 * Algorithm cribbed from glibc2.1, __offtime().
515 */
516#define SECS_PER_MINUTE (60)
517#define SECS_PER_HOUR (SECS_PER_MINUTE * 60)
518#define SECS_PER_DAY (SECS_PER_HOUR * 24)
519
520static void unmktime(unsigned long time, long offset,
521 int *yearp, int *monp, int *dayp,
522 int *hourp, int *minp, int *secp)
523{
524 /* How many days come before each month (0-12). */
525 static const unsigned short int __mon_yday[2][13] =
526 {
527 /* Normal years. */
528 { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
529 /* Leap years. */
530 { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
531 };
532 long int days, rem, y, wday, yday;
533 const unsigned short int *ip;
534
535 days = time / SECS_PER_DAY;
536 rem = time % SECS_PER_DAY;
537 rem += offset;
538 while (rem < 0) {
539 rem += SECS_PER_DAY;
540 --days;
541 }
542 while (rem >= SECS_PER_DAY) {
543 rem -= SECS_PER_DAY;
544 ++days;
545 }
546 *hourp = rem / SECS_PER_HOUR;
547 rem %= SECS_PER_HOUR;
548 *minp = rem / SECS_PER_MINUTE;
549 *secp = rem % SECS_PER_MINUTE;
550 /* January 1, 1970 was a Thursday. */
551 wday = (4 + days) % 7; /* Day in the week. Not currently used */
552 if (wday < 0) wday += 7;
553 y = 1970;
554
555#define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
556#define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
557#define __isleap(year) \
558 ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
559
560 while (days < 0 || days >= (__isleap (y) ? 366 : 365))
561 {
562 /* Guess a corrected year, assuming 365 days per year. */
563 long int yg = y + days / 365 - (days % 365 < 0);
564
565 /* Adjust DAYS and Y to match the guessed year. */
566 days -= ((yg - y) * 365
567 + LEAPS_THRU_END_OF (yg - 1)
568 - LEAPS_THRU_END_OF (y - 1));
569 y = yg;
570 }
571 *yearp = y - 1900;
572 yday = days; /* day in the year. Not currently used. */
573 ip = __mon_yday[__isleap(y)];
574 for (y = 11; days < (long int) ip[y]; --y)
575 continue;
576 days -= ip[y];
577 *monp = y;
578 *dayp = days + 1; /* day in the month */
579 return;
580}
581
582/*
583 * Read/write the hardware clock.
584 */
585
586int mac_hwclk(int op, struct rtc_time *t)
587{
588 unsigned long now;
589
590 if (!op) { /* read */
591 if (macintosh_config->adb_type == MAC_ADB_II) {
592 now = via_read_time();
593 } else
594#ifdef CONFIG_ADB
595 if ((macintosh_config->adb_type == MAC_ADB_IISI) ||
596 (macintosh_config->adb_type == MAC_ADB_PB1) ||
597 (macintosh_config->adb_type == MAC_ADB_PB2) ||
598 (macintosh_config->adb_type == MAC_ADB_CUDA)) {
599 now = adb_read_time();
600 } else
601#endif
602 if (macintosh_config->adb_type == MAC_ADB_IOP) {
603 now = via_read_time();
604 } else {
605 now = 0;
606 }
607
608 t->tm_wday = 0;
609 unmktime(now, 0,
610 &t->tm_year, &t->tm_mon, &t->tm_mday,
611 &t->tm_hour, &t->tm_min, &t->tm_sec);
612 printk("mac_hwclk: read %04d-%02d-%-2d %02d:%02d:%02d\n",
613 t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, t->tm_hour, t->tm_min, t->tm_sec);
614 } else { /* write */
615 printk("mac_hwclk: tried to write %04d-%02d-%-2d %02d:%02d:%02d\n",
616 t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, t->tm_hour, t->tm_min, t->tm_sec);
617
618#if 0 /* it trashes my rtc */
619 now = mktime(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
620 t->tm_hour, t->tm_min, t->tm_sec);
621
622 if (macintosh_config->adb_type == MAC_ADB_II) {
623 via_write_time(now);
624 } else if ((macintosh_config->adb_type == MAC_ADB_IISI) ||
625 (macintosh_config->adb_type == MAC_ADB_PB1) ||
626 (macintosh_config->adb_type == MAC_ADB_PB2) ||
627 (macintosh_config->adb_type == MAC_ADB_CUDA)) {
628 adb_write_time(now);
629 } else if (macintosh_config->adb_type == MAC_ADB_IOP) {
630 via_write_time(now);
631 }
632#endif
633 }
634 return 0;
635}
636
637/*
638 * Set minutes/seconds in the hardware clock
639 */
640
641int mac_set_clock_mmss (unsigned long nowtime)
642{
643 struct rtc_time now;
644
645 mac_hwclk(0, &now);
646 now.tm_sec = nowtime % 60;
647 now.tm_min = (nowtime / 60) % 60;
648 mac_hwclk(1, &now);
649
650 return 0;
651}