Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Miscellaneous Mac68K-specific stuff | |
3 | */ | |
4 | ||
1da177e4 LT |
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> | |
1da177e4 LT |
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 <asm/uaccess.h> | |
20 | #include <asm/io.h> | |
21 | #include <asm/rtc.h> | |
22 | #include <asm/system.h> | |
23 | #include <asm/segment.h> | |
24 | #include <asm/setup.h> | |
25 | #include <asm/macintosh.h> | |
26 | #include <asm/mac_via.h> | |
27 | #include <asm/mac_oss.h> | |
28 | ||
29 | #define BOOTINFO_COMPAT_1_0 | |
30 | #include <asm/bootinfo.h> | |
31 | #include <asm/machdep.h> | |
32 | ||
33 | /* Offset between Unix time (1970-based) and Mac time (1904-based) */ | |
34 | ||
35 | #define RTC_OFFSET 2082844800 | |
36 | ||
1da177e4 LT |
37 | static void (*rom_reset)(void); |
38 | ||
3272244c AV |
39 | #ifdef CONFIG_ADB_CUDA |
40 | static long cuda_read_time(void) | |
1da177e4 | 41 | { |
3272244c | 42 | struct adb_request req; |
1da177e4 LT |
43 | long time; |
44 | ||
3272244c AV |
45 | if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME) < 0) |
46 | return 0; | |
47 | while (!req.complete) | |
48 | cuda_poll(); | |
1da177e4 LT |
49 | |
50 | time = (req.reply[3] << 24) | (req.reply[4] << 16) | |
51 | | (req.reply[5] << 8) | req.reply[6]; | |
52 | return time - RTC_OFFSET; | |
53 | } | |
54 | ||
3272244c AV |
55 | static void cuda_write_time(long data) |
56 | { | |
57 | struct adb_request req; | |
58 | data += RTC_OFFSET; | |
59 | if (cuda_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME, | |
60 | (data >> 24) & 0xFF, (data >> 16) & 0xFF, | |
61 | (data >> 8) & 0xFF, data & 0xFF) < 0) | |
62 | return; | |
63 | while (!req.complete) | |
64 | cuda_poll(); | |
65 | } | |
1da177e4 | 66 | |
3272244c | 67 | static __u8 cuda_read_pram(int offset) |
1da177e4 | 68 | { |
3272244c AV |
69 | struct adb_request req; |
70 | if (cuda_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM, | |
71 | (offset >> 8) & 0xFF, offset & 0xFF) < 0) | |
72 | return 0; | |
73 | while (!req.complete) | |
74 | cuda_poll(); | |
75 | return req.reply[3]; | |
76 | } | |
1da177e4 | 77 | |
3272244c AV |
78 | static void cuda_write_pram(int offset, __u8 data) |
79 | { | |
80 | struct adb_request req; | |
81 | if (cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM, | |
82 | (offset >> 8) & 0xFF, offset & 0xFF, data) < 0) | |
83 | return; | |
84 | while (!req.complete) | |
85 | cuda_poll(); | |
86 | } | |
87 | #else | |
88 | #define cuda_read_time() 0 | |
89 | #define cuda_write_time(n) | |
90 | #define cuda_read_pram NULL | |
91 | #define cuda_write_pram NULL | |
92 | #endif | |
93 | ||
40f7f9c1 | 94 | #if 0 /* def CONFIG_ADB_PMU68K */ |
3272244c AV |
95 | static long pmu_read_time(void) |
96 | { | |
97 | struct adb_request req; | |
98 | long time; | |
99 | ||
100 | if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0) | |
101 | return 0; | |
102 | while (!req.complete) | |
103 | pmu_poll(); | |
1da177e4 | 104 | |
3272244c AV |
105 | time = (req.reply[0] << 24) | (req.reply[1] << 16) |
106 | | (req.reply[2] << 8) | req.reply[3]; | |
107 | return time - RTC_OFFSET; | |
108 | } | |
109 | ||
110 | static void pmu_write_time(long data) | |
111 | { | |
112 | struct adb_request req; | |
113 | data += RTC_OFFSET; | |
114 | if (pmu_request(&req, NULL, 5, PMU_SET_RTC, | |
1da177e4 | 115 | (data >> 24) & 0xFF, (data >> 16) & 0xFF, |
3272244c AV |
116 | (data >> 8) & 0xFF, data & 0xFF) < 0) |
117 | return; | |
118 | while (!req.complete) | |
119 | pmu_poll(); | |
1da177e4 LT |
120 | } |
121 | ||
3272244c AV |
122 | static __u8 pmu_read_pram(int offset) |
123 | { | |
124 | struct adb_request req; | |
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 | } | |
1da177e4 | 132 | |
3272244c | 133 | static void pmu_write_pram(int offset, __u8 data) |
1da177e4 | 134 | { |
3272244c AV |
135 | struct adb_request req; |
136 | if (pmu_request(&req, NULL, 4, PMU_WRITE_NVRAM, | |
137 | (offset >> 8) & 0xFF, offset & 0xFF, data) < 0) | |
138 | return; | |
139 | while (!req.complete) | |
140 | pmu_poll(); | |
141 | } | |
142 | #else | |
143 | #define pmu_read_time() 0 | |
144 | #define pmu_write_time(n) | |
145 | #define pmu_read_pram NULL | |
146 | #define pmu_write_pram NULL | |
147 | #endif | |
1da177e4 | 148 | |
40f7f9c1 | 149 | #if 0 /* def CONFIG_ADB_MACIISI */ |
3272244c AV |
150 | extern int maciisi_request(struct adb_request *req, |
151 | void (*done)(struct adb_request *), int nbytes, ...); | |
152 | ||
153 | static long maciisi_read_time(void) | |
154 | { | |
155 | struct adb_request req; | |
156 | long time; | |
157 | ||
158 | if (maciisi_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME)) | |
159 | return 0; | |
160 | ||
161 | time = (req.reply[3] << 24) | (req.reply[4] << 16) | |
162 | | (req.reply[5] << 8) | req.reply[6]; | |
163 | return time - RTC_OFFSET; | |
1da177e4 LT |
164 | } |
165 | ||
3272244c AV |
166 | static void maciisi_write_time(long data) |
167 | { | |
168 | struct adb_request req; | |
169 | data += RTC_OFFSET; | |
170 | maciisi_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME, | |
171 | (data >> 24) & 0xFF, (data >> 16) & 0xFF, | |
172 | (data >> 8) & 0xFF, data & 0xFF); | |
173 | } | |
1da177e4 | 174 | |
3272244c | 175 | static __u8 maciisi_read_pram(int offset) |
1da177e4 | 176 | { |
3272244c AV |
177 | struct adb_request req; |
178 | if (maciisi_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM, | |
179 | (offset >> 8) & 0xFF, offset & 0xFF)) | |
180 | return 0; | |
181 | return req.reply[3]; | |
182 | } | |
1da177e4 | 183 | |
3272244c AV |
184 | static void maciisi_write_pram(int offset, __u8 data) |
185 | { | |
186 | struct adb_request req; | |
187 | maciisi_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM, | |
188 | (offset >> 8) & 0xFF, offset & 0xFF, data); | |
1da177e4 | 189 | } |
3272244c AV |
190 | #else |
191 | #define maciisi_read_time() 0 | |
192 | #define maciisi_write_time(n) | |
193 | #define maciisi_read_pram NULL | |
194 | #define maciisi_write_pram NULL | |
195 | #endif | |
1da177e4 LT |
196 | |
197 | /* | |
198 | * VIA PRAM/RTC access routines | |
199 | * | |
200 | * Must be called with interrupts disabled and | |
201 | * the RTC should be enabled. | |
202 | */ | |
203 | ||
204 | static __u8 via_pram_readbyte(void) | |
205 | { | |
206 | int i,reg; | |
207 | __u8 data; | |
208 | ||
209 | reg = via1[vBufB] & ~VIA1B_vRTCClk; | |
210 | ||
211 | /* Set the RTC data line to be an input. */ | |
212 | ||
213 | via1[vDirB] &= ~VIA1B_vRTCData; | |
214 | ||
215 | /* The bits of the byte come out in MSB order */ | |
216 | ||
217 | data = 0; | |
218 | for (i = 0 ; i < 8 ; i++) { | |
219 | via1[vBufB] = reg; | |
220 | via1[vBufB] = reg | VIA1B_vRTCClk; | |
221 | data = (data << 1) | (via1[vBufB] & VIA1B_vRTCData); | |
222 | } | |
223 | ||
224 | /* Return RTC data line to output state */ | |
225 | ||
226 | via1[vDirB] |= VIA1B_vRTCData; | |
227 | ||
228 | return data; | |
229 | } | |
230 | ||
231 | static void via_pram_writebyte(__u8 data) | |
232 | { | |
233 | int i,reg,bit; | |
234 | ||
235 | reg = via1[vBufB] & ~(VIA1B_vRTCClk | VIA1B_vRTCData); | |
236 | ||
237 | /* The bits of the byte go in in MSB order */ | |
238 | ||
239 | for (i = 0 ; i < 8 ; i++) { | |
240 | bit = data & 0x80? 1 : 0; | |
241 | data <<= 1; | |
242 | via1[vBufB] = reg | bit; | |
243 | via1[vBufB] = reg | bit | VIA1B_vRTCClk; | |
244 | } | |
245 | } | |
246 | ||
247 | /* | |
248 | * Execute a VIA PRAM/RTC command. For read commands | |
249 | * data should point to a one-byte buffer for the | |
250 | * resulting data. For write commands it should point | |
251 | * to the data byte to for the command. | |
252 | * | |
253 | * This function disables all interrupts while running. | |
254 | */ | |
255 | ||
256 | static void via_pram_command(int command, __u8 *data) | |
257 | { | |
258 | unsigned long flags; | |
259 | int is_read; | |
260 | ||
261 | local_irq_save(flags); | |
262 | ||
263 | /* Enable the RTC and make sure the strobe line is high */ | |
264 | ||
265 | via1[vBufB] = (via1[vBufB] | VIA1B_vRTCClk) & ~VIA1B_vRTCEnb; | |
266 | ||
267 | if (command & 0xFF00) { /* extended (two-byte) command */ | |
268 | via_pram_writebyte((command & 0xFF00) >> 8); | |
269 | via_pram_writebyte(command & 0xFF); | |
270 | is_read = command & 0x8000; | |
271 | } else { /* one-byte command */ | |
272 | via_pram_writebyte(command); | |
273 | is_read = command & 0x80; | |
274 | } | |
275 | if (is_read) { | |
276 | *data = via_pram_readbyte(); | |
277 | } else { | |
278 | via_pram_writebyte(*data); | |
279 | } | |
280 | ||
281 | /* All done, disable the RTC */ | |
282 | ||
283 | via1[vBufB] |= VIA1B_vRTCEnb; | |
284 | ||
285 | local_irq_restore(flags); | |
286 | } | |
287 | ||
288 | static __u8 via_read_pram(int offset) | |
289 | { | |
290 | return 0; | |
291 | } | |
292 | ||
293 | static void via_write_pram(int offset, __u8 data) | |
294 | { | |
295 | } | |
296 | ||
297 | /* | |
298 | * Return the current time in seconds since January 1, 1904. | |
299 | * | |
300 | * This only works on machines with the VIA-based PRAM/RTC, which | |
301 | * is basically any machine with Mac II-style ADB. | |
302 | */ | |
303 | ||
304 | static long via_read_time(void) | |
305 | { | |
306 | union { | |
307 | __u8 cdata[4]; | |
308 | long idata; | |
309 | } result, last_result; | |
310 | int ct; | |
311 | ||
312 | /* | |
313 | * The NetBSD guys say to loop until you get the same reading | |
314 | * twice in a row. | |
315 | */ | |
316 | ||
317 | ct = 0; | |
318 | do { | |
319 | if (++ct > 10) { | |
320 | printk("via_read_time: couldn't get valid time, " | |
321 | "last read = 0x%08lx and 0x%08lx\n", | |
322 | last_result.idata, result.idata); | |
323 | break; | |
324 | } | |
325 | ||
326 | last_result.idata = result.idata; | |
327 | result.idata = 0; | |
328 | ||
329 | via_pram_command(0x81, &result.cdata[3]); | |
330 | via_pram_command(0x85, &result.cdata[2]); | |
331 | via_pram_command(0x89, &result.cdata[1]); | |
332 | via_pram_command(0x8D, &result.cdata[0]); | |
333 | } while (result.idata != last_result.idata); | |
334 | ||
335 | return result.idata - RTC_OFFSET; | |
336 | } | |
337 | ||
338 | /* | |
339 | * Set the current time to a number of seconds since January 1, 1904. | |
340 | * | |
341 | * This only works on machines with the VIA-based PRAM/RTC, which | |
342 | * is basically any machine with Mac II-style ADB. | |
343 | */ | |
344 | ||
345 | static void via_write_time(long time) | |
346 | { | |
347 | union { | |
348 | __u8 cdata[4]; | |
349 | long idata; | |
350 | } data; | |
351 | __u8 temp; | |
352 | ||
353 | /* Clear the write protect bit */ | |
354 | ||
355 | temp = 0x55; | |
356 | via_pram_command(0x35, &temp); | |
357 | ||
358 | data.idata = time + RTC_OFFSET; | |
359 | via_pram_command(0x01, &data.cdata[3]); | |
360 | via_pram_command(0x05, &data.cdata[2]); | |
361 | via_pram_command(0x09, &data.cdata[1]); | |
362 | via_pram_command(0x0D, &data.cdata[0]); | |
363 | ||
364 | /* Set the write protect bit */ | |
365 | ||
366 | temp = 0xD5; | |
367 | via_pram_command(0x35, &temp); | |
368 | } | |
369 | ||
370 | static void via_shutdown(void) | |
371 | { | |
372 | if (rbv_present) { | |
373 | via2[rBufB] &= ~0x04; | |
374 | } else { | |
375 | /* Direction of vDirB is output */ | |
376 | via2[vDirB] |= 0x04; | |
377 | /* Send a value of 0 on that line */ | |
378 | via2[vBufB] &= ~0x04; | |
379 | mdelay(1000); | |
380 | } | |
381 | } | |
382 | ||
383 | /* | |
384 | * FIXME: not sure how this is supposed to work exactly... | |
385 | */ | |
386 | ||
387 | static void oss_shutdown(void) | |
388 | { | |
389 | oss->rom_ctrl = OSS_POWEROFF; | |
390 | } | |
391 | ||
392 | #ifdef CONFIG_ADB_CUDA | |
393 | ||
394 | static void cuda_restart(void) | |
395 | { | |
3272244c AV |
396 | struct adb_request req; |
397 | if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM) < 0) | |
398 | return; | |
399 | while (!req.complete) | |
400 | cuda_poll(); | |
1da177e4 LT |
401 | } |
402 | ||
403 | static void cuda_shutdown(void) | |
404 | { | |
3272244c AV |
405 | struct adb_request req; |
406 | if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN) < 0) | |
407 | return; | |
408 | while (!req.complete) | |
409 | cuda_poll(); | |
1da177e4 LT |
410 | } |
411 | ||
412 | #endif /* CONFIG_ADB_CUDA */ | |
413 | ||
3272244c | 414 | #ifdef CONFIG_ADB_PMU68K |
1da177e4 LT |
415 | |
416 | void pmu_restart(void) | |
417 | { | |
3272244c AV |
418 | struct adb_request req; |
419 | if (pmu_request(&req, NULL, | |
420 | 2, PMU_SET_INTR_MASK, PMU_INT_ADB|PMU_INT_TICK) < 0) | |
421 | return; | |
422 | while (!req.complete) | |
423 | pmu_poll(); | |
424 | if (pmu_request(&req, NULL, 1, PMU_RESET) < 0) | |
425 | return; | |
426 | while (!req.complete) | |
427 | pmu_poll(); | |
1da177e4 LT |
428 | } |
429 | ||
430 | void pmu_shutdown(void) | |
431 | { | |
3272244c AV |
432 | struct adb_request req; |
433 | if (pmu_request(&req, NULL, | |
434 | 2, PMU_SET_INTR_MASK, PMU_INT_ADB|PMU_INT_TICK) < 0) | |
435 | return; | |
436 | while (!req.complete) | |
437 | pmu_poll(); | |
438 | if (pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 'M', 'A', 'T', 'T') < 0) | |
439 | return; | |
440 | while (!req.complete) | |
441 | pmu_poll(); | |
1da177e4 LT |
442 | } |
443 | ||
3272244c | 444 | #endif |
1da177e4 LT |
445 | |
446 | /* | |
447 | *------------------------------------------------------------------- | |
448 | * Below this point are the generic routines; they'll dispatch to the | |
449 | * correct routine for the hardware on which we're running. | |
450 | *------------------------------------------------------------------- | |
451 | */ | |
452 | ||
453 | void mac_pram_read(int offset, __u8 *buffer, int len) | |
454 | { | |
3272244c | 455 | __u8 (*func)(int); |
1da177e4 LT |
456 | int i; |
457 | ||
3272244c AV |
458 | switch(macintosh_config->adb_type) { |
459 | case MAC_ADB_IISI: | |
460 | func = maciisi_read_pram; break; | |
461 | case MAC_ADB_PB1: | |
462 | case MAC_ADB_PB2: | |
463 | func = pmu_read_pram; break; | |
464 | case MAC_ADB_CUDA: | |
465 | func = cuda_read_pram; break; | |
466 | default: | |
1da177e4 LT |
467 | func = via_read_pram; |
468 | } | |
3272244c AV |
469 | if (!func) |
470 | return; | |
1da177e4 LT |
471 | for (i = 0 ; i < len ; i++) { |
472 | buffer[i] = (*func)(offset++); | |
473 | } | |
474 | } | |
475 | ||
476 | void mac_pram_write(int offset, __u8 *buffer, int len) | |
477 | { | |
3272244c | 478 | void (*func)(int, __u8); |
1da177e4 LT |
479 | int i; |
480 | ||
3272244c AV |
481 | switch(macintosh_config->adb_type) { |
482 | case MAC_ADB_IISI: | |
483 | func = maciisi_write_pram; break; | |
484 | case MAC_ADB_PB1: | |
485 | case MAC_ADB_PB2: | |
486 | func = pmu_write_pram; break; | |
487 | case MAC_ADB_CUDA: | |
488 | func = cuda_write_pram; break; | |
489 | default: | |
1da177e4 LT |
490 | func = via_write_pram; |
491 | } | |
3272244c AV |
492 | if (!func) |
493 | return; | |
1da177e4 LT |
494 | for (i = 0 ; i < len ; i++) { |
495 | (*func)(offset++, buffer[i]); | |
496 | } | |
497 | } | |
498 | ||
499 | void mac_poweroff(void) | |
500 | { | |
501 | /* | |
502 | * MAC_ADB_IISI may need to be moved up here if it doesn't actually | |
503 | * work using the ADB packet method. --David Kilzer | |
504 | */ | |
505 | ||
506 | if (oss_present) { | |
507 | oss_shutdown(); | |
508 | } else if (macintosh_config->adb_type == MAC_ADB_II) { | |
509 | via_shutdown(); | |
510 | #ifdef CONFIG_ADB_CUDA | |
511 | } else if (macintosh_config->adb_type == MAC_ADB_CUDA) { | |
512 | cuda_shutdown(); | |
513 | #endif | |
3272244c | 514 | #ifdef CONFIG_ADB_PMU68K |
1da177e4 LT |
515 | } else if (macintosh_config->adb_type == MAC_ADB_PB1 |
516 | || macintosh_config->adb_type == MAC_ADB_PB2) { | |
517 | pmu_shutdown(); | |
518 | #endif | |
519 | } | |
520 | local_irq_enable(); | |
521 | printk("It is now safe to turn off your Macintosh.\n"); | |
522 | while(1); | |
523 | } | |
524 | ||
525 | void mac_reset(void) | |
526 | { | |
527 | if (macintosh_config->adb_type == MAC_ADB_II) { | |
528 | unsigned long flags; | |
529 | ||
530 | /* need ROMBASE in booter */ | |
531 | /* indeed, plus need to MAP THE ROM !! */ | |
532 | ||
533 | if (mac_bi_data.rombase == 0) | |
534 | mac_bi_data.rombase = 0x40800000; | |
535 | ||
536 | /* works on some */ | |
537 | rom_reset = (void *) (mac_bi_data.rombase + 0xa); | |
538 | ||
539 | if (macintosh_config->ident == MAC_MODEL_SE30) { | |
540 | /* | |
541 | * MSch: Machines known to crash on ROM reset ... | |
542 | */ | |
543 | } else { | |
544 | local_irq_save(flags); | |
545 | ||
546 | rom_reset(); | |
547 | ||
548 | local_irq_restore(flags); | |
549 | } | |
550 | #ifdef CONFIG_ADB_CUDA | |
551 | } else if (macintosh_config->adb_type == MAC_ADB_CUDA) { | |
552 | cuda_restart(); | |
553 | #endif | |
3272244c | 554 | #ifdef CONFIG_ADB_PMU68K |
1da177e4 LT |
555 | } else if (macintosh_config->adb_type == MAC_ADB_PB1 |
556 | || macintosh_config->adb_type == MAC_ADB_PB2) { | |
557 | pmu_restart(); | |
558 | #endif | |
559 | } else if (CPU_IS_030) { | |
560 | ||
561 | /* 030-specific reset routine. The idea is general, but the | |
562 | * specific registers to reset are '030-specific. Until I | |
563 | * have a non-030 machine, I can't test anything else. | |
564 | * -- C. Scott Ananian <cananian@alumni.princeton.edu> | |
565 | */ | |
566 | ||
567 | unsigned long rombase = 0x40000000; | |
568 | ||
569 | /* make a 1-to-1 mapping, using the transparent tran. reg. */ | |
570 | unsigned long virt = (unsigned long) mac_reset; | |
571 | unsigned long phys = virt_to_phys(mac_reset); | |
77add9f3 | 572 | unsigned long addr = (phys&0xFF000000)|0x8777; |
1da177e4 LT |
573 | unsigned long offset = phys-virt; |
574 | local_irq_disable(); /* lets not screw this up, ok? */ | |
575 | __asm__ __volatile__(".chip 68030\n\t" | |
576 | "pmove %0,%/tt0\n\t" | |
577 | ".chip 68k" | |
77add9f3 | 578 | : : "m" (addr)); |
1da177e4 LT |
579 | /* Now jump to physical address so we can disable MMU */ |
580 | __asm__ __volatile__( | |
581 | ".chip 68030\n\t" | |
582 | "lea %/pc@(1f),%/a0\n\t" | |
583 | "addl %0,%/a0\n\t"/* fixup target address and stack ptr */ | |
584 | "addl %0,%/sp\n\t" | |
585 | "pflusha\n\t" | |
586 | "jmp %/a0@\n\t" /* jump into physical memory */ | |
587 | "0:.long 0\n\t" /* a constant zero. */ | |
588 | /* OK. Now reset everything and jump to reset vector. */ | |
589 | "1:\n\t" | |
590 | "lea %/pc@(0b),%/a0\n\t" | |
591 | "pmove %/a0@, %/tc\n\t" /* disable mmu */ | |
592 | "pmove %/a0@, %/tt0\n\t" /* disable tt0 */ | |
593 | "pmove %/a0@, %/tt1\n\t" /* disable tt1 */ | |
594 | "movel #0, %/a0\n\t" | |
595 | "movec %/a0, %/vbr\n\t" /* clear vector base register */ | |
596 | "movec %/a0, %/cacr\n\t" /* disable caches */ | |
597 | "movel #0x0808,%/a0\n\t" | |
598 | "movec %/a0, %/cacr\n\t" /* flush i&d caches */ | |
599 | "movew #0x2700,%/sr\n\t" /* set up status register */ | |
600 | "movel %1@(0x0),%/a0\n\t"/* load interrupt stack pointer */ | |
601 | "movec %/a0, %/isp\n\t" | |
602 | "movel %1@(0x4),%/a0\n\t" /* load reset vector */ | |
603 | "reset\n\t" /* reset external devices */ | |
604 | "jmp %/a0@\n\t" /* jump to the reset vector */ | |
605 | ".chip 68k" | |
606 | : : "r" (offset), "a" (rombase) : "a0"); | |
607 | } | |
608 | ||
609 | /* should never get here */ | |
610 | local_irq_enable(); | |
611 | printk ("Restart failed. Please restart manually.\n"); | |
612 | while(1); | |
613 | } | |
614 | ||
615 | /* | |
616 | * This function translates seconds since 1970 into a proper date. | |
617 | * | |
618 | * Algorithm cribbed from glibc2.1, __offtime(). | |
619 | */ | |
620 | #define SECS_PER_MINUTE (60) | |
621 | #define SECS_PER_HOUR (SECS_PER_MINUTE * 60) | |
622 | #define SECS_PER_DAY (SECS_PER_HOUR * 24) | |
623 | ||
624 | static void unmktime(unsigned long time, long offset, | |
625 | int *yearp, int *monp, int *dayp, | |
626 | int *hourp, int *minp, int *secp) | |
627 | { | |
628 | /* How many days come before each month (0-12). */ | |
629 | static const unsigned short int __mon_yday[2][13] = | |
630 | { | |
631 | /* Normal years. */ | |
632 | { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 }, | |
633 | /* Leap years. */ | |
634 | { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 } | |
635 | }; | |
636 | long int days, rem, y, wday, yday; | |
637 | const unsigned short int *ip; | |
638 | ||
639 | days = time / SECS_PER_DAY; | |
640 | rem = time % SECS_PER_DAY; | |
641 | rem += offset; | |
642 | while (rem < 0) { | |
643 | rem += SECS_PER_DAY; | |
644 | --days; | |
645 | } | |
646 | while (rem >= SECS_PER_DAY) { | |
647 | rem -= SECS_PER_DAY; | |
648 | ++days; | |
649 | } | |
650 | *hourp = rem / SECS_PER_HOUR; | |
651 | rem %= SECS_PER_HOUR; | |
652 | *minp = rem / SECS_PER_MINUTE; | |
653 | *secp = rem % SECS_PER_MINUTE; | |
654 | /* January 1, 1970 was a Thursday. */ | |
655 | wday = (4 + days) % 7; /* Day in the week. Not currently used */ | |
656 | if (wday < 0) wday += 7; | |
657 | y = 1970; | |
658 | ||
659 | #define DIV(a, b) ((a) / (b) - ((a) % (b) < 0)) | |
660 | #define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400)) | |
661 | #define __isleap(year) \ | |
662 | ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) | |
663 | ||
664 | while (days < 0 || days >= (__isleap (y) ? 366 : 365)) | |
665 | { | |
666 | /* Guess a corrected year, assuming 365 days per year. */ | |
667 | long int yg = y + days / 365 - (days % 365 < 0); | |
668 | ||
669 | /* Adjust DAYS and Y to match the guessed year. */ | |
670 | days -= ((yg - y) * 365 | |
671 | + LEAPS_THRU_END_OF (yg - 1) | |
672 | - LEAPS_THRU_END_OF (y - 1)); | |
673 | y = yg; | |
674 | } | |
675 | *yearp = y - 1900; | |
676 | yday = days; /* day in the year. Not currently used. */ | |
677 | ip = __mon_yday[__isleap(y)]; | |
678 | for (y = 11; days < (long int) ip[y]; --y) | |
679 | continue; | |
680 | days -= ip[y]; | |
681 | *monp = y; | |
682 | *dayp = days + 1; /* day in the month */ | |
683 | return; | |
684 | } | |
685 | ||
686 | /* | |
687 | * Read/write the hardware clock. | |
688 | */ | |
689 | ||
690 | int mac_hwclk(int op, struct rtc_time *t) | |
691 | { | |
692 | unsigned long now; | |
693 | ||
694 | if (!op) { /* read */ | |
3272244c AV |
695 | switch (macintosh_config->adb_type) { |
696 | case MAC_ADB_II: | |
697 | case MAC_ADB_IOP: | |
1da177e4 | 698 | now = via_read_time(); |
3272244c AV |
699 | break; |
700 | case MAC_ADB_IISI: | |
701 | now = maciisi_read_time(); | |
702 | break; | |
703 | case MAC_ADB_PB1: | |
704 | case MAC_ADB_PB2: | |
705 | now = pmu_read_time(); | |
706 | break; | |
707 | case MAC_ADB_CUDA: | |
708 | now = cuda_read_time(); | |
709 | break; | |
710 | default: | |
1da177e4 LT |
711 | now = 0; |
712 | } | |
713 | ||
714 | t->tm_wday = 0; | |
715 | unmktime(now, 0, | |
716 | &t->tm_year, &t->tm_mon, &t->tm_mday, | |
717 | &t->tm_hour, &t->tm_min, &t->tm_sec); | |
40f7f9c1 | 718 | #if 0 |
1da177e4 | 719 | printk("mac_hwclk: read %04d-%02d-%-2d %02d:%02d:%02d\n", |
40f7f9c1 FT |
720 | t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, |
721 | t->tm_hour, t->tm_min, t->tm_sec); | |
722 | #endif | |
1da177e4 | 723 | } else { /* write */ |
40f7f9c1 | 724 | #if 0 |
1da177e4 | 725 | printk("mac_hwclk: tried to write %04d-%02d-%-2d %02d:%02d:%02d\n", |
40f7f9c1 FT |
726 | t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, |
727 | t->tm_hour, t->tm_min, t->tm_sec); | |
728 | #endif | |
1da177e4 | 729 | |
1da177e4 LT |
730 | now = mktime(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, |
731 | t->tm_hour, t->tm_min, t->tm_sec); | |
732 | ||
3272244c AV |
733 | switch (macintosh_config->adb_type) { |
734 | case MAC_ADB_II: | |
735 | case MAC_ADB_IOP: | |
1da177e4 | 736 | via_write_time(now); |
3272244c AV |
737 | break; |
738 | case MAC_ADB_CUDA: | |
739 | cuda_write_time(now); | |
740 | break; | |
741 | case MAC_ADB_PB1: | |
742 | case MAC_ADB_PB2: | |
743 | pmu_write_time(now); | |
744 | break; | |
745 | case MAC_ADB_IISI: | |
746 | maciisi_write_time(now); | |
1da177e4 | 747 | } |
1da177e4 LT |
748 | } |
749 | return 0; | |
750 | } | |
751 | ||
752 | /* | |
753 | * Set minutes/seconds in the hardware clock | |
754 | */ | |
755 | ||
756 | int mac_set_clock_mmss (unsigned long nowtime) | |
757 | { | |
758 | struct rtc_time now; | |
759 | ||
760 | mac_hwclk(0, &now); | |
761 | now.tm_sec = nowtime % 60; | |
762 | now.tm_min = (nowtime / 60) % 60; | |
763 | mac_hwclk(1, &now); | |
764 | ||
765 | return 0; | |
766 | } |