blob: 56d1f5676ade43628f578c8786dd1e3bf7d1f818 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Miscellaneous Mac68K-specific stuff
3 */
4
Linus Torvalds1da177e2005-04-16 15:20:36 -07005#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
38extern struct mac_booter_data mac_bi_data;
39static void (*rom_reset)(void);
40
Al Viro32722442006-01-12 01:06:13 -080041#ifdef CONFIG_ADB_CUDA
42static long cuda_read_time(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070043{
Al Viro32722442006-01-12 01:06:13 -080044 struct adb_request req;
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 long time;
46
Al Viro32722442006-01-12 01:06:13 -080047 if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME) < 0)
48 return 0;
49 while (!req.complete)
50 cuda_poll();
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
52 time = (req.reply[3] << 24) | (req.reply[4] << 16)
53 | (req.reply[5] << 8) | req.reply[6];
54 return time - RTC_OFFSET;
55}
56
Al Viro32722442006-01-12 01:06:13 -080057static void cuda_write_time(long data)
Linus Torvalds1da177e2005-04-16 15:20:36 -070058{
Al Viro32722442006-01-12 01:06:13 -080059 struct adb_request req;
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 data += RTC_OFFSET;
Al Viro32722442006-01-12 01:06:13 -080061 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}
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Al Viro32722442006-01-12 01:06:13 -080069static __u8 cuda_read_pram(int offset)
70{
71 struct adb_request req;
72 if (cuda_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
73 (offset >> 8) & 0xFF, offset & 0xFF) < 0)
74 return 0;
75 while (!req.complete)
76 cuda_poll();
77 return req.reply[3];
78}
79
80static void cuda_write_pram(int offset, __u8 data)
81{
82 struct adb_request req;
83 if (cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
84 (offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
85 return;
86 while (!req.complete)
87 cuda_poll();
88}
89#else
90#define cuda_read_time() 0
91#define cuda_write_time(n)
92#define cuda_read_pram NULL
93#define cuda_write_pram NULL
94#endif
95
96#ifdef CONFIG_ADB_PMU68K
97static long pmu_read_time(void)
98{
99 struct adb_request req;
100 long time;
101
102 if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
103 return 0;
104 while (!req.complete)
105 pmu_poll();
106
107 time = (req.reply[0] << 24) | (req.reply[1] << 16)
108 | (req.reply[2] << 8) | req.reply[3];
109 return time - RTC_OFFSET;
110}
111
112static void pmu_write_time(long data)
113{
114 struct adb_request req;
115 data += RTC_OFFSET;
116 if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
117 (data >> 24) & 0xFF, (data >> 16) & 0xFF,
118 (data >> 8) & 0xFF, data & 0xFF) < 0)
119 return;
120 while (!req.complete)
121 pmu_poll();
122}
123
124static __u8 pmu_read_pram(int offset)
125{
126 struct adb_request req;
127 if (pmu_request(&req, NULL, 3, PMU_READ_NVRAM,
128 (offset >> 8) & 0xFF, offset & 0xFF) < 0)
129 return 0;
130 while (!req.complete)
131 pmu_poll();
132 return req.reply[3];
133}
134
135static void pmu_write_pram(int offset, __u8 data)
136{
137 struct adb_request req;
138 if (pmu_request(&req, NULL, 4, PMU_WRITE_NVRAM,
139 (offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
140 return;
141 while (!req.complete)
142 pmu_poll();
143}
144#else
145#define pmu_read_time() 0
146#define pmu_write_time(n)
147#define pmu_read_pram NULL
148#define pmu_write_pram NULL
149#endif
150
151#ifdef CONFIG_ADB_MACIISI
152extern int maciisi_request(struct adb_request *req,
153 void (*done)(struct adb_request *), int nbytes, ...);
154
155static long maciisi_read_time(void)
156{
157 struct adb_request req;
158 long time;
159
160 if (maciisi_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME))
161 return 0;
162
163 time = (req.reply[3] << 24) | (req.reply[4] << 16)
164 | (req.reply[5] << 8) | req.reply[6];
165 return time - RTC_OFFSET;
166}
167
168static void maciisi_write_time(long data)
169{
170 struct adb_request req;
171 data += RTC_OFFSET;
172 maciisi_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 (data >> 24) & 0xFF, (data >> 16) & 0xFF,
174 (data >> 8) & 0xFF, data & 0xFF);
175}
176
Al Viro32722442006-01-12 01:06:13 -0800177static __u8 maciisi_read_pram(int offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178{
Al Viro32722442006-01-12 01:06:13 -0800179 struct adb_request req;
180 if (maciisi_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
181 (offset >> 8) & 0xFF, offset & 0xFF))
182 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 return req.reply[3];
184}
185
Al Viro32722442006-01-12 01:06:13 -0800186static void maciisi_write_pram(int offset, __u8 data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187{
Al Viro32722442006-01-12 01:06:13 -0800188 struct adb_request req;
189 maciisi_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
190 (offset >> 8) & 0xFF, offset & 0xFF, data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191}
Al Viro32722442006-01-12 01:06:13 -0800192#else
193#define maciisi_read_time() 0
194#define maciisi_write_time(n)
195#define maciisi_read_pram NULL
196#define maciisi_write_pram NULL
197#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
199/*
200 * VIA PRAM/RTC access routines
201 *
202 * Must be called with interrupts disabled and
203 * the RTC should be enabled.
204 */
205
206static __u8 via_pram_readbyte(void)
207{
208 int i,reg;
209 __u8 data;
210
211 reg = via1[vBufB] & ~VIA1B_vRTCClk;
212
213 /* Set the RTC data line to be an input. */
214
215 via1[vDirB] &= ~VIA1B_vRTCData;
216
217 /* The bits of the byte come out in MSB order */
218
219 data = 0;
220 for (i = 0 ; i < 8 ; i++) {
221 via1[vBufB] = reg;
222 via1[vBufB] = reg | VIA1B_vRTCClk;
223 data = (data << 1) | (via1[vBufB] & VIA1B_vRTCData);
224 }
225
226 /* Return RTC data line to output state */
227
228 via1[vDirB] |= VIA1B_vRTCData;
229
230 return data;
231}
232
233static void via_pram_writebyte(__u8 data)
234{
235 int i,reg,bit;
236
237 reg = via1[vBufB] & ~(VIA1B_vRTCClk | VIA1B_vRTCData);
238
239 /* The bits of the byte go in in MSB order */
240
241 for (i = 0 ; i < 8 ; i++) {
242 bit = data & 0x80? 1 : 0;
243 data <<= 1;
244 via1[vBufB] = reg | bit;
245 via1[vBufB] = reg | bit | VIA1B_vRTCClk;
246 }
247}
248
249/*
250 * Execute a VIA PRAM/RTC command. For read commands
251 * data should point to a one-byte buffer for the
252 * resulting data. For write commands it should point
253 * to the data byte to for the command.
254 *
255 * This function disables all interrupts while running.
256 */
257
258static void via_pram_command(int command, __u8 *data)
259{
260 unsigned long flags;
261 int is_read;
262
263 local_irq_save(flags);
264
265 /* Enable the RTC and make sure the strobe line is high */
266
267 via1[vBufB] = (via1[vBufB] | VIA1B_vRTCClk) & ~VIA1B_vRTCEnb;
268
269 if (command & 0xFF00) { /* extended (two-byte) command */
270 via_pram_writebyte((command & 0xFF00) >> 8);
271 via_pram_writebyte(command & 0xFF);
272 is_read = command & 0x8000;
273 } else { /* one-byte command */
274 via_pram_writebyte(command);
275 is_read = command & 0x80;
276 }
277 if (is_read) {
278 *data = via_pram_readbyte();
279 } else {
280 via_pram_writebyte(*data);
281 }
282
283 /* All done, disable the RTC */
284
285 via1[vBufB] |= VIA1B_vRTCEnb;
286
287 local_irq_restore(flags);
288}
289
290static __u8 via_read_pram(int offset)
291{
292 return 0;
293}
294
295static void via_write_pram(int offset, __u8 data)
296{
297}
298
299/*
300 * Return the current time in seconds since January 1, 1904.
301 *
302 * This only works on machines with the VIA-based PRAM/RTC, which
303 * is basically any machine with Mac II-style ADB.
304 */
305
306static long via_read_time(void)
307{
308 union {
309 __u8 cdata[4];
310 long idata;
311 } result, last_result;
312 int ct;
313
314 /*
315 * The NetBSD guys say to loop until you get the same reading
316 * twice in a row.
317 */
318
319 ct = 0;
320 do {
321 if (++ct > 10) {
322 printk("via_read_time: couldn't get valid time, "
323 "last read = 0x%08lx and 0x%08lx\n",
324 last_result.idata, result.idata);
325 break;
326 }
327
328 last_result.idata = result.idata;
329 result.idata = 0;
330
331 via_pram_command(0x81, &result.cdata[3]);
332 via_pram_command(0x85, &result.cdata[2]);
333 via_pram_command(0x89, &result.cdata[1]);
334 via_pram_command(0x8D, &result.cdata[0]);
335 } while (result.idata != last_result.idata);
336
337 return result.idata - RTC_OFFSET;
338}
339
340/*
341 * Set the current time to a number of seconds since January 1, 1904.
342 *
343 * This only works on machines with the VIA-based PRAM/RTC, which
344 * is basically any machine with Mac II-style ADB.
345 */
346
347static void via_write_time(long time)
348{
349 union {
350 __u8 cdata[4];
351 long idata;
352 } data;
353 __u8 temp;
354
355 /* Clear the write protect bit */
356
357 temp = 0x55;
358 via_pram_command(0x35, &temp);
359
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]);
365
366 /* Set the write protect bit */
367
368 temp = 0xD5;
369 via_pram_command(0x35, &temp);
370}
371
372static void via_shutdown(void)
373{
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);
382 }
383}
384
385/*
386 * FIXME: not sure how this is supposed to work exactly...
387 */
388
389static void oss_shutdown(void)
390{
391 oss->rom_ctrl = OSS_POWEROFF;
392}
393
394#ifdef CONFIG_ADB_CUDA
395
396static void cuda_restart(void)
397{
Al Viro32722442006-01-12 01:06:13 -0800398 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();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403}
404
405static void cuda_shutdown(void)
406{
Al Viro32722442006-01-12 01:06:13 -0800407 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();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412}
413
414#endif /* CONFIG_ADB_CUDA */
415
Al Viro32722442006-01-12 01:06:13 -0800416#ifdef CONFIG_ADB_PMU68K
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417
418void pmu_restart(void)
419{
Al Viro32722442006-01-12 01:06:13 -0800420 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();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430}
431
432void pmu_shutdown(void)
433{
Al Viro32722442006-01-12 01:06:13 -0800434 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();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444}
445
Al Viro32722442006-01-12 01:06:13 -0800446#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447
448/*
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 *-------------------------------------------------------------------
453 */
454
455void mac_pram_read(int offset, __u8 *buffer, int len)
456{
Al Viro32722442006-01-12 01:06:13 -0800457 __u8 (*func)(int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 int i;
459
Al Viro32722442006-01-12 01:06:13 -0800460 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:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 func = via_read_pram;
470 }
Al Viro32722442006-01-12 01:06:13 -0800471 if (!func)
472 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 for (i = 0 ; i < len ; i++) {
474 buffer[i] = (*func)(offset++);
475 }
476}
477
478void mac_pram_write(int offset, __u8 *buffer, int len)
479{
Al Viro32722442006-01-12 01:06:13 -0800480 void (*func)(int, __u8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 int i;
482
Al Viro32722442006-01-12 01:06:13 -0800483 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:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 func = via_write_pram;
493 }
Al Viro32722442006-01-12 01:06:13 -0800494 if (!func)
495 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 for (i = 0 ; i < len ; i++) {
497 (*func)(offset++, buffer[i]);
498 }
499}
500
501void mac_poweroff(void)
502{
503 /*
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
506 */
507
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
Al Viro32722442006-01-12 01:06:13 -0800516#ifdef CONFIG_ADB_PMU68K
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 } else if (macintosh_config->adb_type == MAC_ADB_PB1
518 || macintosh_config->adb_type == MAC_ADB_PB2) {
519 pmu_shutdown();
520#endif
521 }
522 local_irq_enable();
523 printk("It is now safe to turn off your Macintosh.\n");
524 while(1);
525}
526
527void mac_reset(void)
528{
529 if (macintosh_config->adb_type == MAC_ADB_II) {
530 unsigned long flags;
531
532 /* need ROMBASE in booter */
533 /* indeed, plus need to MAP THE ROM !! */
534
535 if (mac_bi_data.rombase == 0)
536 mac_bi_data.rombase = 0x40800000;
537
538 /* works on some */
539 rom_reset = (void *) (mac_bi_data.rombase + 0xa);
540
541 if (macintosh_config->ident == MAC_MODEL_SE30) {
542 /*
543 * MSch: Machines known to crash on ROM reset ...
544 */
545 } else {
546 local_irq_save(flags);
547
548 rom_reset();
549
550 local_irq_restore(flags);
551 }
552#ifdef CONFIG_ADB_CUDA
553 } else if (macintosh_config->adb_type == MAC_ADB_CUDA) {
554 cuda_restart();
555#endif
Al Viro32722442006-01-12 01:06:13 -0800556#ifdef CONFIG_ADB_PMU68K
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 } 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) {
562
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>
567 */
568
569 unsigned long rombase = 0x40000000;
570
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);
Al Viro77add9f2006-01-12 01:06:18 -0800574 unsigned long addr = (phys&0xFF000000)|0x8777;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 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"
Al Viro77add9f2006-01-12 01:06:18 -0800580 : : "m" (addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 /* 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");
609 }
610
611 /* should never get here */
612 local_irq_enable();
613 printk ("Restart failed. Please restart manually.\n");
614 while(1);
615}
616
617/*
618 * This function translates seconds since 1970 into a proper date.
619 *
620 * Algorithm cribbed from glibc2.1, __offtime().
621 */
622#define SECS_PER_MINUTE (60)
623#define SECS_PER_HOUR (SECS_PER_MINUTE * 60)
624#define SECS_PER_DAY (SECS_PER_HOUR * 24)
625
626static void unmktime(unsigned long time, long offset,
627 int *yearp, int *monp, int *dayp,
628 int *hourp, int *minp, int *secp)
629{
630 /* How many days come before each month (0-12). */
631 static const unsigned short int __mon_yday[2][13] =
632 {
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 }
637 };
638 long int days, rem, y, wday, yday;
639 const unsigned short int *ip;
640
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;
647 }
648 while (rem >= SECS_PER_DAY) {
649 rem -= SECS_PER_DAY;
650 ++days;
651 }
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;
660
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))
665
666 while (days < 0 || days >= (__isleap (y) ? 366 : 365))
667 {
668 /* Guess a corrected year, assuming 365 days per year. */
669 long int yg = y + days / 365 - (days % 365 < 0);
670
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;
676 }
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;
686}
687
688/*
689 * Read/write the hardware clock.
690 */
691
692int mac_hwclk(int op, struct rtc_time *t)
693{
694 unsigned long now;
695
696 if (!op) { /* read */
Al Viro32722442006-01-12 01:06:13 -0800697 switch (macintosh_config->adb_type) {
698 case MAC_ADB_II:
699 case MAC_ADB_IOP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 now = via_read_time();
Al Viro32722442006-01-12 01:06:13 -0800701 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:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 now = 0;
714 }
715
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 printk("mac_hwclk: read %04d-%02d-%-2d %02d:%02d:%02d\n",
721 t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, t->tm_hour, t->tm_min, t->tm_sec);
722 } else { /* write */
723 printk("mac_hwclk: tried to write %04d-%02d-%-2d %02d:%02d:%02d\n",
724 t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, t->tm_hour, t->tm_min, t->tm_sec);
725
726#if 0 /* it trashes my rtc */
727 now = mktime(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
728 t->tm_hour, t->tm_min, t->tm_sec);
729
Al Viro32722442006-01-12 01:06:13 -0800730 switch (macintosh_config->adb_type) {
731 case MAC_ADB_II:
732 case MAC_ADB_IOP:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 via_write_time(now);
Al Viro32722442006-01-12 01:06:13 -0800734 break;
735 case MAC_ADB_CUDA:
736 cuda_write_time(now);
737 break;
738 case MAC_ADB_PB1:
739 case MAC_ADB_PB2:
740 pmu_write_time(now);
741 break;
742 case MAC_ADB_IISI:
743 maciisi_write_time(now);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744 }
745#endif
746 }
747 return 0;
748}
749
750/*
751 * Set minutes/seconds in the hardware clock
752 */
753
754int mac_set_clock_mmss (unsigned long nowtime)
755{
756 struct rtc_time now;
757
758 mac_hwclk(0, &now);
759 now.tm_sec = nowtime % 60;
760 now.tm_min = (nowtime / 60) % 60;
761 mac_hwclk(1, &now);
762
763 return 0;
764}