1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * Miscellaneous Mac68K-specific stuff |
4 | */ |
5 | |
6 | #include <linux/types.h> |
7 | #include <linux/errno.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> |
14 | |
15 | #include <linux/adb.h> |
16 | #include <linux/cuda.h> |
17 | #include <linux/pmu.h> |
18 | |
19 | #include <linux/uaccess.h> |
20 | #include <asm/io.h> |
21 | #include <asm/setup.h> |
22 | #include <asm/macintosh.h> |
23 | #include <asm/mac_via.h> |
24 | #include <asm/mac_oss.h> |
25 | |
26 | #include <asm/machdep.h> |
27 | |
28 | #include "mac.h" |
29 | |
30 | /* |
31 | * Offset between Unix time (1970-based) and Mac time (1904-based). Cuda and PMU |
32 | * times wrap in 2040. If we need to handle later times, the read_time functions |
33 | * need to be changed to interpret wrapped times as post-2040. |
34 | */ |
35 | |
36 | #define RTC_OFFSET 2082844800 |
37 | |
38 | static void (*rom_reset)(void); |
39 | |
40 | #if IS_ENABLED(CONFIG_NVRAM) |
41 | #ifdef CONFIG_ADB_CUDA |
42 | static unsigned char cuda_pram_read_byte(int offset) |
43 | { |
44 | struct adb_request req; |
45 | |
46 | if (cuda_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM, |
47 | (offset >> 8) & 0xFF, offset & 0xFF) < 0) |
48 | return 0; |
49 | while (!req.complete) |
50 | cuda_poll(); |
51 | return req.reply[3]; |
52 | } |
53 | |
54 | static void cuda_pram_write_byte(unsigned char data, int offset) |
55 | { |
56 | struct adb_request req; |
57 | |
58 | if (cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM, |
59 | (offset >> 8) & 0xFF, offset & 0xFF, data) < 0) |
60 | return; |
61 | while (!req.complete) |
62 | cuda_poll(); |
63 | } |
64 | #endif /* CONFIG_ADB_CUDA */ |
65 | |
66 | #ifdef CONFIG_ADB_PMU |
67 | static unsigned char pmu_pram_read_byte(int offset) |
68 | { |
69 | struct adb_request req; |
70 | |
71 | if (pmu_request(&req, NULL, 3, PMU_READ_XPRAM, |
72 | offset & 0xFF, 1) < 0) |
73 | return 0; |
74 | pmu_wait_complete(&req); |
75 | |
76 | return req.reply[0]; |
77 | } |
78 | |
79 | static void pmu_pram_write_byte(unsigned char data, int offset) |
80 | { |
81 | struct adb_request req; |
82 | |
83 | if (pmu_request(&req, NULL, 4, PMU_WRITE_XPRAM, |
84 | offset & 0xFF, 1, data) < 0) |
85 | return; |
86 | pmu_wait_complete(&req); |
87 | } |
88 | #endif /* CONFIG_ADB_PMU */ |
89 | #endif /* CONFIG_NVRAM */ |
90 | |
91 | /* |
92 | * VIA PRAM/RTC access routines |
93 | * |
94 | * Must be called with interrupts disabled and |
95 | * the RTC should be enabled. |
96 | */ |
97 | |
98 | static __u8 via_rtc_recv(void) |
99 | { |
100 | int i, reg; |
101 | __u8 data; |
102 | |
103 | reg = via1[vBufB] & ~VIA1B_vRTCClk; |
104 | |
105 | /* Set the RTC data line to be an input. */ |
106 | |
107 | via1[vDirB] &= ~VIA1B_vRTCData; |
108 | |
109 | /* The bits of the byte come out in MSB order */ |
110 | |
111 | data = 0; |
112 | for (i = 0 ; i < 8 ; i++) { |
113 | via1[vBufB] = reg; |
114 | via1[vBufB] = reg | VIA1B_vRTCClk; |
115 | data = (data << 1) | (via1[vBufB] & VIA1B_vRTCData); |
116 | } |
117 | |
118 | /* Return RTC data line to output state */ |
119 | |
120 | via1[vDirB] |= VIA1B_vRTCData; |
121 | |
122 | return data; |
123 | } |
124 | |
125 | static void via_rtc_send(__u8 data) |
126 | { |
127 | int i, reg, bit; |
128 | |
129 | reg = via1[vBufB] & ~(VIA1B_vRTCClk | VIA1B_vRTCData); |
130 | |
131 | /* The bits of the byte go into the RTC in MSB order */ |
132 | |
133 | for (i = 0 ; i < 8 ; i++) { |
134 | bit = data & 0x80? 1 : 0; |
135 | data <<= 1; |
136 | via1[vBufB] = reg | bit; |
137 | via1[vBufB] = reg | bit | VIA1B_vRTCClk; |
138 | } |
139 | } |
140 | |
141 | /* |
142 | * These values can be found in Inside Macintosh vol. III ch. 2 |
143 | * which has a description of the RTC chip in the original Mac. |
144 | */ |
145 | |
146 | #define RTC_FLG_READ BIT(7) |
147 | #define RTC_FLG_WRITE_PROTECT BIT(7) |
148 | #define RTC_CMD_READ(r) (RTC_FLG_READ | (r << 2)) |
149 | #define RTC_CMD_WRITE(r) (r << 2) |
150 | #define RTC_REG_SECONDS_0 0 |
151 | #define RTC_REG_SECONDS_1 1 |
152 | #define RTC_REG_SECONDS_2 2 |
153 | #define RTC_REG_SECONDS_3 3 |
154 | #define RTC_REG_WRITE_PROTECT 13 |
155 | |
156 | /* |
157 | * Inside Mac has no information about two-byte RTC commands but |
158 | * the MAME/MESS source code has the essentials. |
159 | */ |
160 | |
161 | #define RTC_REG_XPRAM 14 |
162 | #define RTC_CMD_XPRAM_READ (RTC_CMD_READ(RTC_REG_XPRAM) << 8) |
163 | #define RTC_CMD_XPRAM_WRITE (RTC_CMD_WRITE(RTC_REG_XPRAM) << 8) |
164 | #define RTC_CMD_XPRAM_ARG(a) (((a & 0xE0) << 3) | ((a & 0x1F) << 2)) |
165 | |
166 | /* |
167 | * Execute a VIA PRAM/RTC command. For read commands |
168 | * data should point to a one-byte buffer for the |
169 | * resulting data. For write commands it should point |
170 | * to the data byte to for the command. |
171 | * |
172 | * This function disables all interrupts while running. |
173 | */ |
174 | |
175 | static void via_rtc_command(int command, __u8 *data) |
176 | { |
177 | unsigned long flags; |
178 | int is_read; |
179 | |
180 | local_irq_save(flags); |
181 | |
182 | /* The least significant bits must be 0b01 according to Inside Mac */ |
183 | |
184 | command = (command & ~3) | 1; |
185 | |
186 | /* Enable the RTC and make sure the strobe line is high */ |
187 | |
188 | via1[vBufB] = (via1[vBufB] | VIA1B_vRTCClk) & ~VIA1B_vRTCEnb; |
189 | |
190 | if (command & 0xFF00) { /* extended (two-byte) command */ |
191 | via_rtc_send(data: (command & 0xFF00) >> 8); |
192 | via_rtc_send(data: command & 0xFF); |
193 | is_read = command & (RTC_FLG_READ << 8); |
194 | } else { /* one-byte command */ |
195 | via_rtc_send(data: command); |
196 | is_read = command & RTC_FLG_READ; |
197 | } |
198 | if (is_read) { |
199 | *data = via_rtc_recv(); |
200 | } else { |
201 | via_rtc_send(data: *data); |
202 | } |
203 | |
204 | /* All done, disable the RTC */ |
205 | |
206 | via1[vBufB] |= VIA1B_vRTCEnb; |
207 | |
208 | local_irq_restore(flags); |
209 | } |
210 | |
211 | #if IS_ENABLED(CONFIG_NVRAM) |
212 | static unsigned char via_pram_read_byte(int offset) |
213 | { |
214 | unsigned char temp; |
215 | |
216 | via_rtc_command(RTC_CMD_XPRAM_READ | RTC_CMD_XPRAM_ARG(offset), data: &temp); |
217 | |
218 | return temp; |
219 | } |
220 | |
221 | static void via_pram_write_byte(unsigned char data, int offset) |
222 | { |
223 | unsigned char temp; |
224 | |
225 | temp = 0x55; |
226 | via_rtc_command(RTC_CMD_WRITE(RTC_REG_WRITE_PROTECT), data: &temp); |
227 | |
228 | temp = data; |
229 | via_rtc_command(RTC_CMD_XPRAM_WRITE | RTC_CMD_XPRAM_ARG(offset), data: &temp); |
230 | |
231 | temp = 0x55 | RTC_FLG_WRITE_PROTECT; |
232 | via_rtc_command(RTC_CMD_WRITE(RTC_REG_WRITE_PROTECT), data: &temp); |
233 | } |
234 | #endif /* CONFIG_NVRAM */ |
235 | |
236 | /* |
237 | * Return the current time in seconds since January 1, 1904. |
238 | * |
239 | * This only works on machines with the VIA-based PRAM/RTC, which |
240 | * is basically any machine with Mac II-style ADB. |
241 | */ |
242 | |
243 | static time64_t via_read_time(void) |
244 | { |
245 | union { |
246 | __u8 cdata[4]; |
247 | __u32 idata; |
248 | } result, last_result; |
249 | int count = 1; |
250 | |
251 | via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_0), data: &last_result.cdata[3]); |
252 | via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_1), data: &last_result.cdata[2]); |
253 | via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_2), data: &last_result.cdata[1]); |
254 | via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_3), data: &last_result.cdata[0]); |
255 | |
256 | /* |
257 | * The NetBSD guys say to loop until you get the same reading |
258 | * twice in a row. |
259 | */ |
260 | |
261 | while (1) { |
262 | via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_0), |
263 | data: &result.cdata[3]); |
264 | via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_1), |
265 | data: &result.cdata[2]); |
266 | via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_2), |
267 | data: &result.cdata[1]); |
268 | via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_3), |
269 | data: &result.cdata[0]); |
270 | |
271 | if (result.idata == last_result.idata) |
272 | return (time64_t)result.idata - RTC_OFFSET; |
273 | |
274 | if (++count > 10) |
275 | break; |
276 | |
277 | last_result.idata = result.idata; |
278 | } |
279 | |
280 | pr_err("%s: failed to read a stable value; got 0x%08x then 0x%08x\n" , |
281 | __func__, last_result.idata, result.idata); |
282 | |
283 | return 0; |
284 | } |
285 | |
286 | /* |
287 | * Set the current time to a number of seconds since January 1, 1904. |
288 | * |
289 | * This only works on machines with the VIA-based PRAM/RTC, which |
290 | * is basically any machine with Mac II-style ADB. |
291 | */ |
292 | |
293 | static void via_set_rtc_time(struct rtc_time *tm) |
294 | { |
295 | union { |
296 | __u8 cdata[4]; |
297 | __u32 idata; |
298 | } data; |
299 | __u8 temp; |
300 | time64_t time; |
301 | |
302 | time = mktime64(year: tm->tm_year + 1900, mon: tm->tm_mon + 1, day: tm->tm_mday, |
303 | hour: tm->tm_hour, min: tm->tm_min, sec: tm->tm_sec); |
304 | |
305 | /* Clear the write protect bit */ |
306 | |
307 | temp = 0x55; |
308 | via_rtc_command(RTC_CMD_WRITE(RTC_REG_WRITE_PROTECT), data: &temp); |
309 | |
310 | data.idata = lower_32_bits(time + RTC_OFFSET); |
311 | via_rtc_command(RTC_CMD_WRITE(RTC_REG_SECONDS_0), data: &data.cdata[3]); |
312 | via_rtc_command(RTC_CMD_WRITE(RTC_REG_SECONDS_1), data: &data.cdata[2]); |
313 | via_rtc_command(RTC_CMD_WRITE(RTC_REG_SECONDS_2), data: &data.cdata[1]); |
314 | via_rtc_command(RTC_CMD_WRITE(RTC_REG_SECONDS_3), data: &data.cdata[0]); |
315 | |
316 | /* Set the write protect bit */ |
317 | |
318 | temp = 0x55 | RTC_FLG_WRITE_PROTECT; |
319 | via_rtc_command(RTC_CMD_WRITE(RTC_REG_WRITE_PROTECT), data: &temp); |
320 | } |
321 | |
322 | static void via_shutdown(void) |
323 | { |
324 | if (rbv_present) { |
325 | via2[rBufB] &= ~0x04; |
326 | } else { |
327 | /* Direction of vDirB is output */ |
328 | via2[vDirB] |= 0x04; |
329 | /* Send a value of 0 on that line */ |
330 | via2[vBufB] &= ~0x04; |
331 | mdelay(1000); |
332 | } |
333 | } |
334 | |
335 | static void oss_shutdown(void) |
336 | { |
337 | oss->rom_ctrl = OSS_POWEROFF; |
338 | } |
339 | |
340 | #ifdef CONFIG_ADB_CUDA |
341 | static void cuda_restart(void) |
342 | { |
343 | struct adb_request req; |
344 | |
345 | if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM) < 0) |
346 | return; |
347 | while (!req.complete) |
348 | cuda_poll(); |
349 | } |
350 | |
351 | static void cuda_shutdown(void) |
352 | { |
353 | struct adb_request req; |
354 | |
355 | if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN) < 0) |
356 | return; |
357 | |
358 | /* Avoid infinite polling loop when PSU is not under Cuda control */ |
359 | switch (macintosh_config->ident) { |
360 | case MAC_MODEL_C660: |
361 | case MAC_MODEL_Q605: |
362 | case MAC_MODEL_Q605_ACC: |
363 | case MAC_MODEL_P475: |
364 | case MAC_MODEL_P475F: |
365 | return; |
366 | } |
367 | |
368 | while (!req.complete) |
369 | cuda_poll(); |
370 | } |
371 | #endif /* CONFIG_ADB_CUDA */ |
372 | |
373 | /* |
374 | *------------------------------------------------------------------- |
375 | * Below this point are the generic routines; they'll dispatch to the |
376 | * correct routine for the hardware on which we're running. |
377 | *------------------------------------------------------------------- |
378 | */ |
379 | |
380 | #if IS_ENABLED(CONFIG_NVRAM) |
381 | unsigned char mac_pram_read_byte(int addr) |
382 | { |
383 | switch (macintosh_config->adb_type) { |
384 | case MAC_ADB_IOP: |
385 | case MAC_ADB_II: |
386 | case MAC_ADB_PB1: |
387 | return via_pram_read_byte(offset: addr); |
388 | #ifdef CONFIG_ADB_CUDA |
389 | case MAC_ADB_EGRET: |
390 | case MAC_ADB_CUDA: |
391 | return cuda_pram_read_byte(addr); |
392 | #endif |
393 | #ifdef CONFIG_ADB_PMU |
394 | case MAC_ADB_PB2: |
395 | return pmu_pram_read_byte(addr); |
396 | #endif |
397 | default: |
398 | return 0xFF; |
399 | } |
400 | } |
401 | |
402 | void mac_pram_write_byte(unsigned char val, int addr) |
403 | { |
404 | switch (macintosh_config->adb_type) { |
405 | case MAC_ADB_IOP: |
406 | case MAC_ADB_II: |
407 | case MAC_ADB_PB1: |
408 | via_pram_write_byte(data: val, offset: addr); |
409 | break; |
410 | #ifdef CONFIG_ADB_CUDA |
411 | case MAC_ADB_EGRET: |
412 | case MAC_ADB_CUDA: |
413 | cuda_pram_write_byte(val, addr); |
414 | break; |
415 | #endif |
416 | #ifdef CONFIG_ADB_PMU |
417 | case MAC_ADB_PB2: |
418 | pmu_pram_write_byte(val, addr); |
419 | break; |
420 | #endif |
421 | default: |
422 | break; |
423 | } |
424 | } |
425 | |
426 | ssize_t mac_pram_get_size(void) |
427 | { |
428 | return 256; |
429 | } |
430 | #endif /* CONFIG_NVRAM */ |
431 | |
432 | void mac_poweroff(void) |
433 | { |
434 | if (oss_present) { |
435 | oss_shutdown(); |
436 | } else if (macintosh_config->adb_type == MAC_ADB_II) { |
437 | via_shutdown(); |
438 | #ifdef CONFIG_ADB_CUDA |
439 | } else if (macintosh_config->adb_type == MAC_ADB_EGRET || |
440 | macintosh_config->adb_type == MAC_ADB_CUDA) { |
441 | cuda_shutdown(); |
442 | #endif |
443 | #ifdef CONFIG_ADB_PMU |
444 | } else if (macintosh_config->adb_type == MAC_ADB_PB2) { |
445 | pmu_shutdown(); |
446 | #endif |
447 | } |
448 | |
449 | pr_crit("It is now safe to turn off your Macintosh.\n" ); |
450 | local_irq_disable(); |
451 | while(1); |
452 | } |
453 | |
454 | void mac_reset(void) |
455 | { |
456 | if (macintosh_config->adb_type == MAC_ADB_II && |
457 | macintosh_config->ident != MAC_MODEL_SE30) { |
458 | /* need ROMBASE in booter */ |
459 | /* indeed, plus need to MAP THE ROM !! */ |
460 | |
461 | if (mac_bi_data.rombase == 0) |
462 | mac_bi_data.rombase = 0x40800000; |
463 | |
464 | /* works on some */ |
465 | rom_reset = (void *) (mac_bi_data.rombase + 0xa); |
466 | |
467 | local_irq_disable(); |
468 | rom_reset(); |
469 | #ifdef CONFIG_ADB_CUDA |
470 | } else if (macintosh_config->adb_type == MAC_ADB_EGRET || |
471 | macintosh_config->adb_type == MAC_ADB_CUDA) { |
472 | cuda_restart(); |
473 | #endif |
474 | #ifdef CONFIG_ADB_PMU |
475 | } else if (macintosh_config->adb_type == MAC_ADB_PB2) { |
476 | pmu_restart(); |
477 | #endif |
478 | } else if (CPU_IS_030) { |
479 | |
480 | /* 030-specific reset routine. The idea is general, but the |
481 | * specific registers to reset are '030-specific. Until I |
482 | * have a non-030 machine, I can't test anything else. |
483 | * -- C. Scott Ananian <cananian@alumni.princeton.edu> |
484 | */ |
485 | |
486 | unsigned long rombase = 0x40000000; |
487 | |
488 | /* make a 1-to-1 mapping, using the transparent tran. reg. */ |
489 | unsigned long virt = (unsigned long) mac_reset; |
490 | unsigned long phys = virt_to_phys(address: mac_reset); |
491 | unsigned long addr = (phys&0xFF000000)|0x8777; |
492 | unsigned long offset = phys-virt; |
493 | |
494 | local_irq_disable(); /* lets not screw this up, ok? */ |
495 | __asm__ __volatile__(".chip 68030\n\t" |
496 | "pmove %0,%/tt0\n\t" |
497 | ".chip 68k" |
498 | : : "m" (addr)); |
499 | /* Now jump to physical address so we can disable MMU */ |
500 | __asm__ __volatile__( |
501 | ".chip 68030\n\t" |
502 | "lea %/pc@(1f),%/a0\n\t" |
503 | "addl %0,%/a0\n\t" /* fixup target address and stack ptr */ |
504 | "addl %0,%/sp\n\t" |
505 | "pflusha\n\t" |
506 | "jmp %/a0@\n\t" /* jump into physical memory */ |
507 | "0:.long 0\n\t" /* a constant zero. */ |
508 | /* OK. Now reset everything and jump to reset vector. */ |
509 | "1:\n\t" |
510 | "lea %/pc@(0b),%/a0\n\t" |
511 | "pmove %/a0@, %/tc\n\t" /* disable mmu */ |
512 | "pmove %/a0@, %/tt0\n\t" /* disable tt0 */ |
513 | "pmove %/a0@, %/tt1\n\t" /* disable tt1 */ |
514 | "movel #0, %/a0\n\t" |
515 | "movec %/a0, %/vbr\n\t" /* clear vector base register */ |
516 | "movec %/a0, %/cacr\n\t" /* disable caches */ |
517 | "movel #0x0808,%/a0\n\t" |
518 | "movec %/a0, %/cacr\n\t" /* flush i&d caches */ |
519 | "movew #0x2700,%/sr\n\t" /* set up status register */ |
520 | "movel %1@(0x0),%/a0\n\t" /* load interrupt stack pointer */ |
521 | "movec %/a0, %/isp\n\t" |
522 | "movel %1@(0x4),%/a0\n\t" /* load reset vector */ |
523 | "reset\n\t" /* reset external devices */ |
524 | "jmp %/a0@\n\t" /* jump to the reset vector */ |
525 | ".chip 68k" |
526 | : : "r" (offset), "a" (rombase) : "a0" ); |
527 | } |
528 | |
529 | /* should never get here */ |
530 | pr_crit("Restart failed. Please restart manually.\n" ); |
531 | local_irq_disable(); |
532 | while(1); |
533 | } |
534 | |
535 | /* |
536 | * This function translates seconds since 1970 into a proper date. |
537 | * |
538 | * Algorithm cribbed from glibc2.1, __offtime(). |
539 | * |
540 | * This is roughly same as rtc_time64_to_tm(), which we should probably |
541 | * use here, but it's only available when CONFIG_RTC_LIB is enabled. |
542 | */ |
543 | #define SECS_PER_MINUTE (60) |
544 | #define SECS_PER_HOUR (SECS_PER_MINUTE * 60) |
545 | #define SECS_PER_DAY (SECS_PER_HOUR * 24) |
546 | |
547 | static void unmktime(time64_t time, long offset, |
548 | int *yearp, int *monp, int *dayp, |
549 | int *hourp, int *minp, int *secp) |
550 | { |
551 | /* How many days come before each month (0-12). */ |
552 | static const unsigned short int __mon_yday[2][13] = |
553 | { |
554 | /* Normal years. */ |
555 | { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 }, |
556 | /* Leap years. */ |
557 | { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 } |
558 | }; |
559 | int days, rem, y, wday; |
560 | const unsigned short int *ip; |
561 | |
562 | days = div_u64_rem(dividend: time, SECS_PER_DAY, remainder: &rem); |
563 | rem += offset; |
564 | while (rem < 0) { |
565 | rem += SECS_PER_DAY; |
566 | --days; |
567 | } |
568 | while (rem >= SECS_PER_DAY) { |
569 | rem -= SECS_PER_DAY; |
570 | ++days; |
571 | } |
572 | *hourp = rem / SECS_PER_HOUR; |
573 | rem %= SECS_PER_HOUR; |
574 | *minp = rem / SECS_PER_MINUTE; |
575 | *secp = rem % SECS_PER_MINUTE; |
576 | /* January 1, 1970 was a Thursday. */ |
577 | wday = (4 + days) % 7; /* Day in the week. Not currently used */ |
578 | if (wday < 0) wday += 7; |
579 | y = 1970; |
580 | |
581 | #define DIV(a, b) ((a) / (b) - ((a) % (b) < 0)) |
582 | #define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400)) |
583 | #define __isleap(year) \ |
584 | ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) |
585 | |
586 | while (days < 0 || days >= (__isleap (y) ? 366 : 365)) |
587 | { |
588 | /* Guess a corrected year, assuming 365 days per year. */ |
589 | long int yg = y + days / 365 - (days % 365 < 0); |
590 | |
591 | /* Adjust DAYS and Y to match the guessed year. */ |
592 | days -= (yg - y) * 365 + |
593 | LEAPS_THRU_END_OF(yg - 1) - LEAPS_THRU_END_OF(y - 1); |
594 | y = yg; |
595 | } |
596 | *yearp = y - 1900; |
597 | ip = __mon_yday[__isleap(y)]; |
598 | for (y = 11; days < (long int) ip[y]; --y) |
599 | continue; |
600 | days -= ip[y]; |
601 | *monp = y; |
602 | *dayp = days + 1; /* day in the month */ |
603 | return; |
604 | } |
605 | |
606 | /* |
607 | * Read/write the hardware clock. |
608 | */ |
609 | |
610 | int mac_hwclk(int op, struct rtc_time *t) |
611 | { |
612 | time64_t now; |
613 | |
614 | if (!op) { /* read */ |
615 | switch (macintosh_config->adb_type) { |
616 | case MAC_ADB_IOP: |
617 | case MAC_ADB_II: |
618 | case MAC_ADB_PB1: |
619 | now = via_read_time(); |
620 | break; |
621 | #ifdef CONFIG_ADB_CUDA |
622 | case MAC_ADB_EGRET: |
623 | case MAC_ADB_CUDA: |
624 | now = cuda_get_time(); |
625 | break; |
626 | #endif |
627 | #ifdef CONFIG_ADB_PMU |
628 | case MAC_ADB_PB2: |
629 | now = pmu_get_time(); |
630 | break; |
631 | #endif |
632 | default: |
633 | now = 0; |
634 | } |
635 | |
636 | t->tm_wday = 0; |
637 | unmktime(time: now, offset: 0, |
638 | yearp: &t->tm_year, monp: &t->tm_mon, dayp: &t->tm_mday, |
639 | hourp: &t->tm_hour, minp: &t->tm_min, secp: &t->tm_sec); |
640 | pr_debug("%s: read %ptR\n" , __func__, t); |
641 | } else { /* write */ |
642 | pr_debug("%s: tried to write %ptR\n" , __func__, t); |
643 | |
644 | switch (macintosh_config->adb_type) { |
645 | case MAC_ADB_IOP: |
646 | case MAC_ADB_II: |
647 | case MAC_ADB_PB1: |
648 | via_set_rtc_time(tm: t); |
649 | break; |
650 | #ifdef CONFIG_ADB_CUDA |
651 | case MAC_ADB_EGRET: |
652 | case MAC_ADB_CUDA: |
653 | cuda_set_rtc_time(t); |
654 | break; |
655 | #endif |
656 | #ifdef CONFIG_ADB_PMU |
657 | case MAC_ADB_PB2: |
658 | pmu_set_rtc_time(t); |
659 | break; |
660 | #endif |
661 | default: |
662 | return -ENODEV; |
663 | } |
664 | } |
665 | return 0; |
666 | } |
667 | |