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 | ||
7c0f6ba6 | 19 | #include <linux/uaccess.h> |
1da177e4 | 20 | #include <asm/io.h> |
1da177e4 LT |
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> | |
26 | ||
1da177e4 LT |
27 | #include <asm/machdep.h> |
28 | ||
29 | /* Offset between Unix time (1970-based) and Mac time (1904-based) */ | |
30 | ||
31 | #define RTC_OFFSET 2082844800 | |
32 | ||
1da177e4 LT |
33 | static void (*rom_reset)(void); |
34 | ||
3272244c AV |
35 | #ifdef CONFIG_ADB_CUDA |
36 | static long cuda_read_time(void) | |
1da177e4 | 37 | { |
3272244c | 38 | struct adb_request req; |
1da177e4 LT |
39 | long time; |
40 | ||
3272244c AV |
41 | if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME) < 0) |
42 | return 0; | |
43 | while (!req.complete) | |
44 | cuda_poll(); | |
1da177e4 LT |
45 | |
46 | time = (req.reply[3] << 24) | (req.reply[4] << 16) | |
47 | | (req.reply[5] << 8) | req.reply[6]; | |
48 | return time - RTC_OFFSET; | |
49 | } | |
50 | ||
3272244c AV |
51 | static void cuda_write_time(long data) |
52 | { | |
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(); | |
61 | } | |
1da177e4 | 62 | |
3272244c | 63 | static __u8 cuda_read_pram(int offset) |
1da177e4 | 64 | { |
3272244c AV |
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]; | |
72 | } | |
1da177e4 | 73 | |
3272244c AV |
74 | static void cuda_write_pram(int offset, __u8 data) |
75 | { | |
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(); | |
82 | } | |
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 | |
89 | ||
d643e2d2 | 90 | #ifdef CONFIG_ADB_PMU68K |
3272244c AV |
91 | static long pmu_read_time(void) |
92 | { | |
93 | struct adb_request req; | |
94 | long time; | |
95 | ||
96 | if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0) | |
97 | return 0; | |
98 | while (!req.complete) | |
99 | pmu_poll(); | |
1da177e4 | 100 | |
d643e2d2 FT |
101 | time = (req.reply[1] << 24) | (req.reply[2] << 16) |
102 | | (req.reply[3] << 8) | req.reply[4]; | |
3272244c AV |
103 | return time - RTC_OFFSET; |
104 | } | |
105 | ||
106 | static void pmu_write_time(long data) | |
107 | { | |
108 | struct adb_request req; | |
109 | data += RTC_OFFSET; | |
110 | if (pmu_request(&req, NULL, 5, PMU_SET_RTC, | |
1da177e4 | 111 | (data >> 24) & 0xFF, (data >> 16) & 0xFF, |
3272244c AV |
112 | (data >> 8) & 0xFF, data & 0xFF) < 0) |
113 | return; | |
114 | while (!req.complete) | |
115 | pmu_poll(); | |
1da177e4 LT |
116 | } |
117 | ||
3272244c AV |
118 | static __u8 pmu_read_pram(int offset) |
119 | { | |
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]; | |
127 | } | |
1da177e4 | 128 | |
3272244c | 129 | static void pmu_write_pram(int offset, __u8 data) |
1da177e4 | 130 | { |
3272244c AV |
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(); | |
137 | } | |
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 | |
1da177e4 | 144 | |
40f7f9c1 | 145 | #if 0 /* def CONFIG_ADB_MACIISI */ |
3272244c AV |
146 | extern int maciisi_request(struct adb_request *req, |
147 | void (*done)(struct adb_request *), int nbytes, ...); | |
148 | ||
149 | static long maciisi_read_time(void) | |
150 | { | |
151 | struct adb_request req; | |
152 | long time; | |
153 | ||
154 | if (maciisi_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME)) | |
155 | return 0; | |
156 | ||
157 | time = (req.reply[3] << 24) | (req.reply[4] << 16) | |
158 | | (req.reply[5] << 8) | req.reply[6]; | |
159 | return time - RTC_OFFSET; | |
1da177e4 LT |
160 | } |
161 | ||
3272244c AV |
162 | static void maciisi_write_time(long data) |
163 | { | |
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); | |
169 | } | |
1da177e4 | 170 | |
3272244c | 171 | static __u8 maciisi_read_pram(int offset) |
1da177e4 | 172 | { |
3272244c AV |
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]; | |
178 | } | |
1da177e4 | 179 | |
3272244c AV |
180 | static void maciisi_write_pram(int offset, __u8 data) |
181 | { | |
182 | struct adb_request req; | |
183 | maciisi_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM, | |
184 | (offset >> 8) & 0xFF, offset & 0xFF, data); | |
1da177e4 | 185 | } |
3272244c AV |
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 | |
1da177e4 LT |
192 | |
193 | /* | |
194 | * VIA PRAM/RTC access routines | |
195 | * | |
196 | * Must be called with interrupts disabled and | |
197 | * the RTC should be enabled. | |
198 | */ | |
199 | ||
200 | static __u8 via_pram_readbyte(void) | |
201 | { | |
202 | int i,reg; | |
203 | __u8 data; | |
204 | ||
205 | reg = via1[vBufB] & ~VIA1B_vRTCClk; | |
206 | ||
207 | /* Set the RTC data line to be an input. */ | |
208 | ||
209 | via1[vDirB] &= ~VIA1B_vRTCData; | |
210 | ||
211 | /* The bits of the byte come out in MSB order */ | |
212 | ||
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); | |
218 | } | |
219 | ||
220 | /* Return RTC data line to output state */ | |
221 | ||
222 | via1[vDirB] |= VIA1B_vRTCData; | |
223 | ||
224 | return data; | |
225 | } | |
226 | ||
227 | static void via_pram_writebyte(__u8 data) | |
228 | { | |
229 | int i,reg,bit; | |
230 | ||
231 | reg = via1[vBufB] & ~(VIA1B_vRTCClk | VIA1B_vRTCData); | |
232 | ||
233 | /* The bits of the byte go in in MSB order */ | |
234 | ||
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; | |
240 | } | |
241 | } | |
242 | ||
243 | /* | |
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. | |
248 | * | |
249 | * This function disables all interrupts while running. | |
250 | */ | |
251 | ||
252 | static void via_pram_command(int command, __u8 *data) | |
253 | { | |
254 | unsigned long flags; | |
255 | int is_read; | |
256 | ||
257 | local_irq_save(flags); | |
258 | ||
259 | /* Enable the RTC and make sure the strobe line is high */ | |
260 | ||
261 | via1[vBufB] = (via1[vBufB] | VIA1B_vRTCClk) & ~VIA1B_vRTCEnb; | |
262 | ||
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; | |
270 | } | |
271 | if (is_read) { | |
272 | *data = via_pram_readbyte(); | |
273 | } else { | |
274 | via_pram_writebyte(*data); | |
275 | } | |
276 | ||
277 | /* All done, disable the RTC */ | |
278 | ||
279 | via1[vBufB] |= VIA1B_vRTCEnb; | |
280 | ||
281 | local_irq_restore(flags); | |
282 | } | |
283 | ||
284 | static __u8 via_read_pram(int offset) | |
285 | { | |
286 | return 0; | |
287 | } | |
288 | ||
289 | static void via_write_pram(int offset, __u8 data) | |
290 | { | |
291 | } | |
292 | ||
293 | /* | |
294 | * Return the current time in seconds since January 1, 1904. | |
295 | * | |
296 | * This only works on machines with the VIA-based PRAM/RTC, which | |
297 | * is basically any machine with Mac II-style ADB. | |
298 | */ | |
299 | ||
300 | static long via_read_time(void) | |
301 | { | |
302 | union { | |
75a23850 FT |
303 | __u8 cdata[4]; |
304 | long idata; | |
1da177e4 | 305 | } result, last_result; |
75a23850 FT |
306 | int count = 1; |
307 | ||
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]); | |
1da177e4 LT |
312 | |
313 | /* | |
314 | * The NetBSD guys say to loop until you get the same reading | |
315 | * twice in a row. | |
316 | */ | |
317 | ||
75a23850 | 318 | while (1) { |
1da177e4 LT |
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]); | |
1da177e4 | 323 | |
75a23850 FT |
324 | if (result.idata == last_result.idata) |
325 | return result.idata - RTC_OFFSET; | |
326 | ||
327 | if (++count > 10) | |
328 | break; | |
329 | ||
330 | last_result.idata = result.idata; | |
331 | } | |
332 | ||
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); | |
336 | ||
337 | return 0; | |
1da177e4 LT |
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 | ||
347 | static 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 | ||
372 | static 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 | ||
389 | static void oss_shutdown(void) | |
390 | { | |
391 | oss->rom_ctrl = OSS_POWEROFF; | |
392 | } | |
393 | ||
394 | #ifdef CONFIG_ADB_CUDA | |
395 | ||
396 | static void cuda_restart(void) | |
397 | { | |
3272244c AV |
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(); | |
1da177e4 LT |
403 | } |
404 | ||
405 | static void cuda_shutdown(void) | |
406 | { | |
3272244c AV |
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(); | |
1da177e4 LT |
412 | } |
413 | ||
414 | #endif /* CONFIG_ADB_CUDA */ | |
415 | ||
3272244c | 416 | #ifdef CONFIG_ADB_PMU68K |
1da177e4 LT |
417 | |
418 | void pmu_restart(void) | |
419 | { | |
3272244c AV |
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(); | |
1da177e4 LT |
430 | } |
431 | ||
432 | void pmu_shutdown(void) | |
433 | { | |
3272244c AV |
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(); | |
1da177e4 LT |
444 | } |
445 | ||
3272244c | 446 | #endif |
1da177e4 LT |
447 | |
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 | ||
455 | void mac_pram_read(int offset, __u8 *buffer, int len) | |
456 | { | |
3272244c | 457 | __u8 (*func)(int); |
1da177e4 LT |
458 | int i; |
459 | ||
3272244c AV |
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: | |
1da177e4 LT |
469 | func = via_read_pram; |
470 | } | |
3272244c AV |
471 | if (!func) |
472 | return; | |
1da177e4 LT |
473 | for (i = 0 ; i < len ; i++) { |
474 | buffer[i] = (*func)(offset++); | |
475 | } | |
476 | } | |
477 | ||
478 | void mac_pram_write(int offset, __u8 *buffer, int len) | |
479 | { | |
3272244c | 480 | void (*func)(int, __u8); |
1da177e4 LT |
481 | int i; |
482 | ||
3272244c AV |
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: | |
1da177e4 LT |
492 | func = via_write_pram; |
493 | } | |
3272244c AV |
494 | if (!func) |
495 | return; | |
1da177e4 LT |
496 | for (i = 0 ; i < len ; i++) { |
497 | (*func)(offset++, buffer[i]); | |
498 | } | |
499 | } | |
500 | ||
501 | void 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 | |
3272244c | 516 | #ifdef CONFIG_ADB_PMU68K |
1da177e4 LT |
517 | } 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 | ||
527 | void 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 | |
3272244c | 556 | #ifdef CONFIG_ADB_PMU68K |
1da177e4 LT |
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) { | |
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); | |
77add9f3 | 574 | unsigned long addr = (phys&0xFF000000)|0x8777; |
1da177e4 LT |
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" | |
77add9f3 | 580 | : : "m" (addr)); |
1da177e4 LT |
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"); | |
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 | ||
626 | static 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 | ||
692 | int mac_hwclk(int op, struct rtc_time *t) | |
693 | { | |
694 | unsigned long now; | |
695 | ||
696 | if (!op) { /* read */ | |
3272244c AV |
697 | switch (macintosh_config->adb_type) { |
698 | case MAC_ADB_II: | |
699 | case MAC_ADB_IOP: | |
1da177e4 | 700 | now = via_read_time(); |
3272244c AV |
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: | |
1da177e4 LT |
713 | 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); | |
40f7f9c1 | 720 | #if 0 |
1da177e4 | 721 | printk("mac_hwclk: read %04d-%02d-%-2d %02d:%02d:%02d\n", |
40f7f9c1 FT |
722 | t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, |
723 | t->tm_hour, t->tm_min, t->tm_sec); | |
724 | #endif | |
1da177e4 | 725 | } else { /* write */ |
40f7f9c1 | 726 | #if 0 |
1da177e4 | 727 | printk("mac_hwclk: tried to write %04d-%02d-%-2d %02d:%02d:%02d\n", |
40f7f9c1 FT |
728 | t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, |
729 | t->tm_hour, t->tm_min, t->tm_sec); | |
730 | #endif | |
1da177e4 | 731 | |
1da177e4 LT |
732 | now = mktime(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, |
733 | t->tm_hour, t->tm_min, t->tm_sec); | |
734 | ||
3272244c AV |
735 | switch (macintosh_config->adb_type) { |
736 | case MAC_ADB_II: | |
737 | case MAC_ADB_IOP: | |
1da177e4 | 738 | via_write_time(now); |
3272244c AV |
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); | |
1da177e4 | 749 | } |
1da177e4 LT |
750 | } |
751 | return 0; | |
752 | } | |
753 | ||
754 | /* | |
755 | * Set minutes/seconds in the hardware clock | |
756 | */ | |
757 | ||
758 | int mac_set_clock_mmss (unsigned long nowtime) | |
759 | { | |
760 | struct rtc_time now; | |
761 | ||
762 | mac_hwclk(0, &now); | |
763 | now.tm_sec = nowtime % 60; | |
764 | now.tm_min = (nowtime / 60) % 60; | |
765 | mac_hwclk(1, &now); | |
766 | ||
767 | return 0; | |
768 | } |