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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * Miscellaneous Mac68K-specific stuff | |
4 | */ | |
5 | ||
1da177e4 LT |
6 | #include <linux/types.h> |
7 | #include <linux/errno.h> | |
1da177e4 LT |
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 | ||
5b9bfb8e AB |
29 | /* |
30 | * Offset between Unix time (1970-based) and Mac time (1904-based). Cuda and PMU | |
31 | * times wrap in 2040. If we need to handle later times, the read_time functions | |
32 | * need to be changed to interpret wrapped times as post-2040. | |
33 | */ | |
1da177e4 LT |
34 | |
35 | #define RTC_OFFSET 2082844800 | |
36 | ||
1da177e4 LT |
37 | static void (*rom_reset)(void); |
38 | ||
3272244c | 39 | #ifdef CONFIG_ADB_CUDA |
3272244c | 40 | static __u8 cuda_read_pram(int offset) |
1da177e4 | 41 | { |
3272244c | 42 | struct adb_request req; |
31b1c780 | 43 | |
3272244c | 44 | if (cuda_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM, |
31b1c780 | 45 | (offset >> 8) & 0xFF, offset & 0xFF) < 0) |
3272244c AV |
46 | return 0; |
47 | while (!req.complete) | |
48 | cuda_poll(); | |
49 | return req.reply[3]; | |
50 | } | |
1da177e4 | 51 | |
3272244c AV |
52 | static void cuda_write_pram(int offset, __u8 data) |
53 | { | |
54 | struct adb_request req; | |
31b1c780 | 55 | |
3272244c | 56 | if (cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM, |
31b1c780 | 57 | (offset >> 8) & 0xFF, offset & 0xFF, data) < 0) |
3272244c AV |
58 | return; |
59 | while (!req.complete) | |
60 | cuda_poll(); | |
61 | } | |
6df2afba | 62 | #endif /* CONFIG_ADB_CUDA */ |
3272244c | 63 | |
ebd72227 | 64 | #ifdef CONFIG_ADB_PMU |
3272244c AV |
65 | static __u8 pmu_read_pram(int offset) |
66 | { | |
67 | struct adb_request req; | |
31b1c780 | 68 | |
3272244c AV |
69 | if (pmu_request(&req, NULL, 3, PMU_READ_NVRAM, |
70 | (offset >> 8) & 0xFF, offset & 0xFF) < 0) | |
71 | return 0; | |
72 | while (!req.complete) | |
73 | pmu_poll(); | |
74 | return req.reply[3]; | |
75 | } | |
1da177e4 | 76 | |
3272244c | 77 | static void pmu_write_pram(int offset, __u8 data) |
1da177e4 | 78 | { |
3272244c | 79 | struct adb_request req; |
31b1c780 | 80 | |
3272244c AV |
81 | if (pmu_request(&req, NULL, 4, PMU_WRITE_NVRAM, |
82 | (offset >> 8) & 0xFF, offset & 0xFF, data) < 0) | |
83 | return; | |
84 | while (!req.complete) | |
85 | pmu_poll(); | |
86 | } | |
ebd72227 | 87 | #endif /* CONFIG_ADB_PMU */ |
1da177e4 | 88 | |
1da177e4 LT |
89 | /* |
90 | * VIA PRAM/RTC access routines | |
91 | * | |
92 | * Must be called with interrupts disabled and | |
93 | * the RTC should be enabled. | |
94 | */ | |
95 | ||
96 | static __u8 via_pram_readbyte(void) | |
97 | { | |
31b1c780 FT |
98 | int i, reg; |
99 | __u8 data; | |
1da177e4 LT |
100 | |
101 | reg = via1[vBufB] & ~VIA1B_vRTCClk; | |
102 | ||
103 | /* Set the RTC data line to be an input. */ | |
104 | ||
105 | via1[vDirB] &= ~VIA1B_vRTCData; | |
106 | ||
107 | /* The bits of the byte come out in MSB order */ | |
108 | ||
109 | data = 0; | |
110 | for (i = 0 ; i < 8 ; i++) { | |
111 | via1[vBufB] = reg; | |
112 | via1[vBufB] = reg | VIA1B_vRTCClk; | |
113 | data = (data << 1) | (via1[vBufB] & VIA1B_vRTCData); | |
114 | } | |
115 | ||
116 | /* Return RTC data line to output state */ | |
117 | ||
118 | via1[vDirB] |= VIA1B_vRTCData; | |
119 | ||
120 | return data; | |
121 | } | |
122 | ||
123 | static void via_pram_writebyte(__u8 data) | |
124 | { | |
31b1c780 | 125 | int i, reg, bit; |
1da177e4 LT |
126 | |
127 | reg = via1[vBufB] & ~(VIA1B_vRTCClk | VIA1B_vRTCData); | |
128 | ||
129 | /* The bits of the byte go in in MSB order */ | |
130 | ||
131 | for (i = 0 ; i < 8 ; i++) { | |
132 | bit = data & 0x80? 1 : 0; | |
133 | data <<= 1; | |
134 | via1[vBufB] = reg | bit; | |
135 | via1[vBufB] = reg | bit | VIA1B_vRTCClk; | |
136 | } | |
137 | } | |
138 | ||
139 | /* | |
140 | * Execute a VIA PRAM/RTC command. For read commands | |
141 | * data should point to a one-byte buffer for the | |
142 | * resulting data. For write commands it should point | |
143 | * to the data byte to for the command. | |
144 | * | |
145 | * This function disables all interrupts while running. | |
146 | */ | |
147 | ||
148 | static void via_pram_command(int command, __u8 *data) | |
149 | { | |
150 | unsigned long flags; | |
31b1c780 | 151 | int is_read; |
1da177e4 LT |
152 | |
153 | local_irq_save(flags); | |
154 | ||
155 | /* Enable the RTC and make sure the strobe line is high */ | |
156 | ||
157 | via1[vBufB] = (via1[vBufB] | VIA1B_vRTCClk) & ~VIA1B_vRTCEnb; | |
158 | ||
159 | if (command & 0xFF00) { /* extended (two-byte) command */ | |
160 | via_pram_writebyte((command & 0xFF00) >> 8); | |
161 | via_pram_writebyte(command & 0xFF); | |
162 | is_read = command & 0x8000; | |
163 | } else { /* one-byte command */ | |
164 | via_pram_writebyte(command); | |
165 | is_read = command & 0x80; | |
166 | } | |
167 | if (is_read) { | |
168 | *data = via_pram_readbyte(); | |
169 | } else { | |
170 | via_pram_writebyte(*data); | |
171 | } | |
172 | ||
173 | /* All done, disable the RTC */ | |
174 | ||
175 | via1[vBufB] |= VIA1B_vRTCEnb; | |
176 | ||
177 | local_irq_restore(flags); | |
178 | } | |
179 | ||
180 | static __u8 via_read_pram(int offset) | |
181 | { | |
182 | return 0; | |
183 | } | |
184 | ||
185 | static void via_write_pram(int offset, __u8 data) | |
186 | { | |
187 | } | |
188 | ||
189 | /* | |
190 | * Return the current time in seconds since January 1, 1904. | |
191 | * | |
192 | * This only works on machines with the VIA-based PRAM/RTC, which | |
193 | * is basically any machine with Mac II-style ADB. | |
194 | */ | |
195 | ||
5b9bfb8e | 196 | static time64_t via_read_time(void) |
1da177e4 LT |
197 | { |
198 | union { | |
75a23850 | 199 | __u8 cdata[4]; |
5b9bfb8e | 200 | __u32 idata; |
1da177e4 | 201 | } result, last_result; |
75a23850 FT |
202 | int count = 1; |
203 | ||
204 | via_pram_command(0x81, &last_result.cdata[3]); | |
205 | via_pram_command(0x85, &last_result.cdata[2]); | |
206 | via_pram_command(0x89, &last_result.cdata[1]); | |
207 | via_pram_command(0x8D, &last_result.cdata[0]); | |
1da177e4 LT |
208 | |
209 | /* | |
210 | * The NetBSD guys say to loop until you get the same reading | |
211 | * twice in a row. | |
212 | */ | |
213 | ||
75a23850 | 214 | while (1) { |
1da177e4 LT |
215 | via_pram_command(0x81, &result.cdata[3]); |
216 | via_pram_command(0x85, &result.cdata[2]); | |
217 | via_pram_command(0x89, &result.cdata[1]); | |
218 | via_pram_command(0x8D, &result.cdata[0]); | |
1da177e4 | 219 | |
75a23850 | 220 | if (result.idata == last_result.idata) |
5b9bfb8e | 221 | return (time64_t)result.idata - RTC_OFFSET; |
75a23850 FT |
222 | |
223 | if (++count > 10) | |
224 | break; | |
225 | ||
226 | last_result.idata = result.idata; | |
227 | } | |
228 | ||
5b9bfb8e AB |
229 | pr_err("%s: failed to read a stable value; got 0x%08x then 0x%08x\n", |
230 | __func__, last_result.idata, result.idata); | |
75a23850 FT |
231 | |
232 | return 0; | |
1da177e4 LT |
233 | } |
234 | ||
235 | /* | |
236 | * Set the current time to a number of seconds since January 1, 1904. | |
237 | * | |
238 | * This only works on machines with the VIA-based PRAM/RTC, which | |
239 | * is basically any machine with Mac II-style ADB. | |
240 | */ | |
241 | ||
0792a2c8 | 242 | static void via_set_rtc_time(struct rtc_time *tm) |
1da177e4 LT |
243 | { |
244 | union { | |
31b1c780 | 245 | __u8 cdata[4]; |
5b9bfb8e | 246 | __u32 idata; |
1da177e4 | 247 | } data; |
31b1c780 | 248 | __u8 temp; |
0792a2c8 FT |
249 | time64_t time; |
250 | ||
251 | time = mktime64(tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, | |
252 | tm->tm_hour, tm->tm_min, tm->tm_sec); | |
1da177e4 LT |
253 | |
254 | /* Clear the write protect bit */ | |
255 | ||
256 | temp = 0x55; | |
257 | via_pram_command(0x35, &temp); | |
258 | ||
5b9bfb8e | 259 | data.idata = lower_32_bits(time + RTC_OFFSET); |
1da177e4 LT |
260 | via_pram_command(0x01, &data.cdata[3]); |
261 | via_pram_command(0x05, &data.cdata[2]); | |
262 | via_pram_command(0x09, &data.cdata[1]); | |
263 | via_pram_command(0x0D, &data.cdata[0]); | |
264 | ||
265 | /* Set the write protect bit */ | |
266 | ||
267 | temp = 0xD5; | |
268 | via_pram_command(0x35, &temp); | |
269 | } | |
270 | ||
271 | static void via_shutdown(void) | |
272 | { | |
273 | if (rbv_present) { | |
274 | via2[rBufB] &= ~0x04; | |
275 | } else { | |
276 | /* Direction of vDirB is output */ | |
277 | via2[vDirB] |= 0x04; | |
278 | /* Send a value of 0 on that line */ | |
279 | via2[vBufB] &= ~0x04; | |
280 | mdelay(1000); | |
281 | } | |
282 | } | |
283 | ||
1da177e4 LT |
284 | static void oss_shutdown(void) |
285 | { | |
286 | oss->rom_ctrl = OSS_POWEROFF; | |
287 | } | |
288 | ||
289 | #ifdef CONFIG_ADB_CUDA | |
1da177e4 LT |
290 | static void cuda_restart(void) |
291 | { | |
3272244c | 292 | struct adb_request req; |
31b1c780 | 293 | |
3272244c AV |
294 | if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM) < 0) |
295 | return; | |
296 | while (!req.complete) | |
297 | cuda_poll(); | |
1da177e4 LT |
298 | } |
299 | ||
300 | static void cuda_shutdown(void) | |
301 | { | |
3272244c | 302 | struct adb_request req; |
31b1c780 | 303 | |
3272244c AV |
304 | if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN) < 0) |
305 | return; | |
41e93a30 FT |
306 | |
307 | /* Avoid infinite polling loop when PSU is not under Cuda control */ | |
308 | switch (macintosh_config->ident) { | |
309 | case MAC_MODEL_C660: | |
310 | case MAC_MODEL_Q605: | |
311 | case MAC_MODEL_Q605_ACC: | |
312 | case MAC_MODEL_P475: | |
313 | case MAC_MODEL_P475F: | |
314 | return; | |
315 | } | |
316 | ||
3272244c AV |
317 | while (!req.complete) |
318 | cuda_poll(); | |
1da177e4 | 319 | } |
1da177e4 LT |
320 | #endif /* CONFIG_ADB_CUDA */ |
321 | ||
1da177e4 LT |
322 | /* |
323 | *------------------------------------------------------------------- | |
324 | * Below this point are the generic routines; they'll dispatch to the | |
325 | * correct routine for the hardware on which we're running. | |
326 | *------------------------------------------------------------------- | |
327 | */ | |
328 | ||
329 | void mac_pram_read(int offset, __u8 *buffer, int len) | |
330 | { | |
3272244c | 331 | __u8 (*func)(int); |
1da177e4 LT |
332 | int i; |
333 | ||
31b1c780 | 334 | switch (macintosh_config->adb_type) { |
6df2afba FT |
335 | case MAC_ADB_IOP: |
336 | case MAC_ADB_II: | |
3272244c | 337 | case MAC_ADB_PB1: |
6df2afba | 338 | func = via_read_pram; |
31b1c780 | 339 | break; |
6df2afba | 340 | #ifdef CONFIG_ADB_CUDA |
f74faec6 | 341 | case MAC_ADB_EGRET: |
3272244c | 342 | case MAC_ADB_CUDA: |
31b1c780 FT |
343 | func = cuda_read_pram; |
344 | break; | |
6df2afba | 345 | #endif |
ebd72227 | 346 | #ifdef CONFIG_ADB_PMU |
6df2afba FT |
347 | case MAC_ADB_PB2: |
348 | func = pmu_read_pram; | |
349 | break; | |
350 | #endif | |
3272244c | 351 | default: |
3272244c | 352 | return; |
6df2afba | 353 | } |
1da177e4 LT |
354 | for (i = 0 ; i < len ; i++) { |
355 | buffer[i] = (*func)(offset++); | |
356 | } | |
357 | } | |
358 | ||
359 | void mac_pram_write(int offset, __u8 *buffer, int len) | |
360 | { | |
3272244c | 361 | void (*func)(int, __u8); |
1da177e4 LT |
362 | int i; |
363 | ||
31b1c780 | 364 | switch (macintosh_config->adb_type) { |
6df2afba FT |
365 | case MAC_ADB_IOP: |
366 | case MAC_ADB_II: | |
3272244c | 367 | case MAC_ADB_PB1: |
6df2afba | 368 | func = via_write_pram; |
31b1c780 | 369 | break; |
6df2afba | 370 | #ifdef CONFIG_ADB_CUDA |
f74faec6 | 371 | case MAC_ADB_EGRET: |
3272244c | 372 | case MAC_ADB_CUDA: |
31b1c780 FT |
373 | func = cuda_write_pram; |
374 | break; | |
6df2afba | 375 | #endif |
ebd72227 | 376 | #ifdef CONFIG_ADB_PMU |
6df2afba FT |
377 | case MAC_ADB_PB2: |
378 | func = pmu_write_pram; | |
379 | break; | |
380 | #endif | |
3272244c | 381 | default: |
3272244c | 382 | return; |
6df2afba | 383 | } |
1da177e4 LT |
384 | for (i = 0 ; i < len ; i++) { |
385 | (*func)(offset++, buffer[i]); | |
386 | } | |
387 | } | |
388 | ||
389 | void mac_poweroff(void) | |
390 | { | |
1da177e4 LT |
391 | if (oss_present) { |
392 | oss_shutdown(); | |
393 | } else if (macintosh_config->adb_type == MAC_ADB_II) { | |
394 | via_shutdown(); | |
395 | #ifdef CONFIG_ADB_CUDA | |
f74faec6 FT |
396 | } else if (macintosh_config->adb_type == MAC_ADB_EGRET || |
397 | macintosh_config->adb_type == MAC_ADB_CUDA) { | |
1da177e4 LT |
398 | cuda_shutdown(); |
399 | #endif | |
ebd72227 | 400 | #ifdef CONFIG_ADB_PMU |
54c99077 | 401 | } else if (macintosh_config->adb_type == MAC_ADB_PB2) { |
1da177e4 LT |
402 | pmu_shutdown(); |
403 | #endif | |
404 | } | |
558d5ad2 | 405 | |
889121b4 | 406 | pr_crit("It is now safe to turn off your Macintosh.\n"); |
558d5ad2 | 407 | local_irq_disable(); |
1da177e4 LT |
408 | while(1); |
409 | } | |
410 | ||
411 | void mac_reset(void) | |
412 | { | |
413 | if (macintosh_config->adb_type == MAC_ADB_II) { | |
414 | unsigned long flags; | |
415 | ||
416 | /* need ROMBASE in booter */ | |
417 | /* indeed, plus need to MAP THE ROM !! */ | |
418 | ||
419 | if (mac_bi_data.rombase == 0) | |
420 | mac_bi_data.rombase = 0x40800000; | |
421 | ||
422 | /* works on some */ | |
423 | rom_reset = (void *) (mac_bi_data.rombase + 0xa); | |
424 | ||
425 | if (macintosh_config->ident == MAC_MODEL_SE30) { | |
426 | /* | |
427 | * MSch: Machines known to crash on ROM reset ... | |
428 | */ | |
429 | } else { | |
430 | local_irq_save(flags); | |
431 | ||
432 | rom_reset(); | |
433 | ||
434 | local_irq_restore(flags); | |
435 | } | |
436 | #ifdef CONFIG_ADB_CUDA | |
f74faec6 FT |
437 | } else if (macintosh_config->adb_type == MAC_ADB_EGRET || |
438 | macintosh_config->adb_type == MAC_ADB_CUDA) { | |
1da177e4 LT |
439 | cuda_restart(); |
440 | #endif | |
ebd72227 | 441 | #ifdef CONFIG_ADB_PMU |
54c99077 | 442 | } else if (macintosh_config->adb_type == MAC_ADB_PB2) { |
1da177e4 LT |
443 | pmu_restart(); |
444 | #endif | |
445 | } else if (CPU_IS_030) { | |
446 | ||
447 | /* 030-specific reset routine. The idea is general, but the | |
448 | * specific registers to reset are '030-specific. Until I | |
449 | * have a non-030 machine, I can't test anything else. | |
450 | * -- C. Scott Ananian <cananian@alumni.princeton.edu> | |
451 | */ | |
452 | ||
453 | unsigned long rombase = 0x40000000; | |
454 | ||
455 | /* make a 1-to-1 mapping, using the transparent tran. reg. */ | |
456 | unsigned long virt = (unsigned long) mac_reset; | |
457 | unsigned long phys = virt_to_phys(mac_reset); | |
77add9f3 | 458 | unsigned long addr = (phys&0xFF000000)|0x8777; |
1da177e4 | 459 | unsigned long offset = phys-virt; |
31b1c780 | 460 | |
1da177e4 LT |
461 | local_irq_disable(); /* lets not screw this up, ok? */ |
462 | __asm__ __volatile__(".chip 68030\n\t" | |
463 | "pmove %0,%/tt0\n\t" | |
464 | ".chip 68k" | |
77add9f3 | 465 | : : "m" (addr)); |
1da177e4 LT |
466 | /* Now jump to physical address so we can disable MMU */ |
467 | __asm__ __volatile__( | |
31b1c780 | 468 | ".chip 68030\n\t" |
1da177e4 LT |
469 | "lea %/pc@(1f),%/a0\n\t" |
470 | "addl %0,%/a0\n\t"/* fixup target address and stack ptr */ | |
471 | "addl %0,%/sp\n\t" | |
472 | "pflusha\n\t" | |
473 | "jmp %/a0@\n\t" /* jump into physical memory */ | |
474 | "0:.long 0\n\t" /* a constant zero. */ | |
475 | /* OK. Now reset everything and jump to reset vector. */ | |
476 | "1:\n\t" | |
477 | "lea %/pc@(0b),%/a0\n\t" | |
478 | "pmove %/a0@, %/tc\n\t" /* disable mmu */ | |
479 | "pmove %/a0@, %/tt0\n\t" /* disable tt0 */ | |
480 | "pmove %/a0@, %/tt1\n\t" /* disable tt1 */ | |
481 | "movel #0, %/a0\n\t" | |
482 | "movec %/a0, %/vbr\n\t" /* clear vector base register */ | |
483 | "movec %/a0, %/cacr\n\t" /* disable caches */ | |
484 | "movel #0x0808,%/a0\n\t" | |
485 | "movec %/a0, %/cacr\n\t" /* flush i&d caches */ | |
486 | "movew #0x2700,%/sr\n\t" /* set up status register */ | |
487 | "movel %1@(0x0),%/a0\n\t"/* load interrupt stack pointer */ | |
488 | "movec %/a0, %/isp\n\t" | |
489 | "movel %1@(0x4),%/a0\n\t" /* load reset vector */ | |
490 | "reset\n\t" /* reset external devices */ | |
491 | "jmp %/a0@\n\t" /* jump to the reset vector */ | |
492 | ".chip 68k" | |
493 | : : "r" (offset), "a" (rombase) : "a0"); | |
494 | } | |
495 | ||
496 | /* should never get here */ | |
889121b4 | 497 | pr_crit("Restart failed. Please restart manually.\n"); |
558d5ad2 | 498 | local_irq_disable(); |
1da177e4 LT |
499 | while(1); |
500 | } | |
501 | ||
502 | /* | |
503 | * This function translates seconds since 1970 into a proper date. | |
504 | * | |
505 | * Algorithm cribbed from glibc2.1, __offtime(). | |
5b9bfb8e AB |
506 | * |
507 | * This is roughly same as rtc_time64_to_tm(), which we should probably | |
508 | * use here, but it's only available when CONFIG_RTC_LIB is enabled. | |
1da177e4 LT |
509 | */ |
510 | #define SECS_PER_MINUTE (60) | |
511 | #define SECS_PER_HOUR (SECS_PER_MINUTE * 60) | |
512 | #define SECS_PER_DAY (SECS_PER_HOUR * 24) | |
513 | ||
5b9bfb8e | 514 | static void unmktime(time64_t time, long offset, |
1da177e4 LT |
515 | int *yearp, int *monp, int *dayp, |
516 | int *hourp, int *minp, int *secp) | |
517 | { | |
518 | /* How many days come before each month (0-12). */ | |
519 | static const unsigned short int __mon_yday[2][13] = | |
520 | { | |
521 | /* Normal years. */ | |
522 | { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 }, | |
523 | /* Leap years. */ | |
524 | { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 } | |
525 | }; | |
5b9bfb8e | 526 | int days, rem, y, wday, yday; |
1da177e4 LT |
527 | const unsigned short int *ip; |
528 | ||
5b9bfb8e | 529 | days = div_u64_rem(time, SECS_PER_DAY, &rem); |
1da177e4 LT |
530 | rem += offset; |
531 | while (rem < 0) { | |
532 | rem += SECS_PER_DAY; | |
533 | --days; | |
534 | } | |
535 | while (rem >= SECS_PER_DAY) { | |
536 | rem -= SECS_PER_DAY; | |
537 | ++days; | |
538 | } | |
539 | *hourp = rem / SECS_PER_HOUR; | |
540 | rem %= SECS_PER_HOUR; | |
541 | *minp = rem / SECS_PER_MINUTE; | |
542 | *secp = rem % SECS_PER_MINUTE; | |
543 | /* January 1, 1970 was a Thursday. */ | |
544 | wday = (4 + days) % 7; /* Day in the week. Not currently used */ | |
545 | if (wday < 0) wday += 7; | |
546 | y = 1970; | |
547 | ||
548 | #define DIV(a, b) ((a) / (b) - ((a) % (b) < 0)) | |
549 | #define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400)) | |
550 | #define __isleap(year) \ | |
551 | ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) | |
552 | ||
553 | while (days < 0 || days >= (__isleap (y) ? 366 : 365)) | |
554 | { | |
555 | /* Guess a corrected year, assuming 365 days per year. */ | |
556 | long int yg = y + days / 365 - (days % 365 < 0); | |
557 | ||
558 | /* Adjust DAYS and Y to match the guessed year. */ | |
31b1c780 FT |
559 | days -= (yg - y) * 365 + |
560 | LEAPS_THRU_END_OF(yg - 1) - LEAPS_THRU_END_OF(y - 1); | |
1da177e4 LT |
561 | y = yg; |
562 | } | |
563 | *yearp = y - 1900; | |
564 | yday = days; /* day in the year. Not currently used. */ | |
565 | ip = __mon_yday[__isleap(y)]; | |
566 | for (y = 11; days < (long int) ip[y]; --y) | |
567 | continue; | |
568 | days -= ip[y]; | |
569 | *monp = y; | |
570 | *dayp = days + 1; /* day in the month */ | |
571 | return; | |
572 | } | |
573 | ||
574 | /* | |
575 | * Read/write the hardware clock. | |
576 | */ | |
577 | ||
578 | int mac_hwclk(int op, struct rtc_time *t) | |
579 | { | |
5b9bfb8e | 580 | time64_t now; |
1da177e4 LT |
581 | |
582 | if (!op) { /* read */ | |
3272244c | 583 | switch (macintosh_config->adb_type) { |
3272244c | 584 | case MAC_ADB_IOP: |
6df2afba | 585 | case MAC_ADB_II: |
3272244c | 586 | case MAC_ADB_PB1: |
6df2afba | 587 | now = via_read_time(); |
3272244c | 588 | break; |
6df2afba | 589 | #ifdef CONFIG_ADB_CUDA |
f74faec6 | 590 | case MAC_ADB_EGRET: |
3272244c | 591 | case MAC_ADB_CUDA: |
0792a2c8 | 592 | now = cuda_get_time(); |
3272244c | 593 | break; |
6df2afba | 594 | #endif |
ebd72227 | 595 | #ifdef CONFIG_ADB_PMU |
6df2afba | 596 | case MAC_ADB_PB2: |
0792a2c8 | 597 | now = pmu_get_time(); |
6df2afba FT |
598 | break; |
599 | #endif | |
3272244c | 600 | default: |
1da177e4 LT |
601 | now = 0; |
602 | } | |
603 | ||
604 | t->tm_wday = 0; | |
605 | unmktime(now, 0, | |
606 | &t->tm_year, &t->tm_mon, &t->tm_mday, | |
607 | &t->tm_hour, &t->tm_min, &t->tm_sec); | |
90625444 | 608 | pr_debug("%s: read %ptR\n", __func__, t); |
1da177e4 | 609 | } else { /* write */ |
90625444 | 610 | pr_debug("%s: tried to write %ptR\n", __func__, t); |
1da177e4 | 611 | |
3272244c | 612 | switch (macintosh_config->adb_type) { |
3272244c | 613 | case MAC_ADB_IOP: |
6df2afba FT |
614 | case MAC_ADB_II: |
615 | case MAC_ADB_PB1: | |
0792a2c8 | 616 | via_set_rtc_time(t); |
3272244c | 617 | break; |
6df2afba | 618 | #ifdef CONFIG_ADB_CUDA |
f74faec6 | 619 | case MAC_ADB_EGRET: |
3272244c | 620 | case MAC_ADB_CUDA: |
0792a2c8 | 621 | cuda_set_rtc_time(t); |
3272244c | 622 | break; |
6df2afba | 623 | #endif |
ebd72227 | 624 | #ifdef CONFIG_ADB_PMU |
3272244c | 625 | case MAC_ADB_PB2: |
0792a2c8 | 626 | pmu_set_rtc_time(t); |
3272244c | 627 | break; |
6df2afba FT |
628 | #endif |
629 | default: | |
630 | return -ENODEV; | |
1da177e4 | 631 | } |
1da177e4 LT |
632 | } |
633 | return 0; | |
634 | } |