2 * Miscellaneous Mac68K-specific stuff
5 #include <linux/types.h>
6 #include <linux/errno.h>
7 #include <linux/kernel.h>
8 #include <linux/delay.h>
9 #include <linux/sched.h>
10 #include <linux/time.h>
11 #include <linux/rtc.h>
14 #include <linux/adb.h>
15 #include <linux/cuda.h>
16 #include <linux/pmu.h>
18 #include <linux/uaccess.h>
20 #include <asm/segment.h>
21 #include <asm/setup.h>
22 #include <asm/macintosh.h>
23 #include <asm/mac_via.h>
24 #include <asm/mac_oss.h>
26 #include <asm/machdep.h>
28 /* Offset between Unix time (1970-based) and Mac time (1904-based) */
30 #define RTC_OFFSET 2082844800
32 static void (*rom_reset)(void);
34 #ifdef CONFIG_ADB_CUDA
35 static long cuda_read_time(void)
37 struct adb_request req;
40 if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME) < 0)
45 time = (req.reply[3] << 24) | (req.reply[4] << 16)
46 | (req.reply[5] << 8) | req.reply[6];
47 return time - RTC_OFFSET;
50 static void cuda_write_time(long data)
52 struct adb_request req;
54 if (cuda_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME,
55 (data >> 24) & 0xFF, (data >> 16) & 0xFF,
56 (data >> 8) & 0xFF, data & 0xFF) < 0)
62 static __u8 cuda_read_pram(int offset)
64 struct adb_request req;
65 if (cuda_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
66 (offset >> 8) & 0xFF, offset & 0xFF) < 0)
73 static void cuda_write_pram(int offset, __u8 data)
75 struct adb_request req;
76 if (cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
77 (offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
83 #define cuda_read_time() 0
84 #define cuda_write_time(n)
85 #define cuda_read_pram NULL
86 #define cuda_write_pram NULL
89 #ifdef CONFIG_ADB_PMU68K
90 static long pmu_read_time(void)
92 struct adb_request req;
95 if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
100 time = (req.reply[1] << 24) | (req.reply[2] << 16)
101 | (req.reply[3] << 8) | req.reply[4];
102 return time - RTC_OFFSET;
105 static void pmu_write_time(long data)
107 struct adb_request req;
109 if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
110 (data >> 24) & 0xFF, (data >> 16) & 0xFF,
111 (data >> 8) & 0xFF, data & 0xFF) < 0)
113 while (!req.complete)
117 static __u8 pmu_read_pram(int offset)
119 struct adb_request req;
120 if (pmu_request(&req, NULL, 3, PMU_READ_NVRAM,
121 (offset >> 8) & 0xFF, offset & 0xFF) < 0)
123 while (!req.complete)
128 static void pmu_write_pram(int offset, __u8 data)
130 struct adb_request req;
131 if (pmu_request(&req, NULL, 4, PMU_WRITE_NVRAM,
132 (offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
134 while (!req.complete)
138 #define pmu_read_time() 0
139 #define pmu_write_time(n)
140 #define pmu_read_pram NULL
141 #define pmu_write_pram NULL
145 * VIA PRAM/RTC access routines
147 * Must be called with interrupts disabled and
148 * the RTC should be enabled.
151 static __u8 via_pram_readbyte(void)
156 reg = via1[vBufB] & ~VIA1B_vRTCClk;
158 /* Set the RTC data line to be an input. */
160 via1[vDirB] &= ~VIA1B_vRTCData;
162 /* The bits of the byte come out in MSB order */
165 for (i = 0 ; i < 8 ; i++) {
167 via1[vBufB] = reg | VIA1B_vRTCClk;
168 data = (data << 1) | (via1[vBufB] & VIA1B_vRTCData);
171 /* Return RTC data line to output state */
173 via1[vDirB] |= VIA1B_vRTCData;
178 static void via_pram_writebyte(__u8 data)
182 reg = via1[vBufB] & ~(VIA1B_vRTCClk | VIA1B_vRTCData);
184 /* The bits of the byte go in in MSB order */
186 for (i = 0 ; i < 8 ; i++) {
187 bit = data & 0x80? 1 : 0;
189 via1[vBufB] = reg | bit;
190 via1[vBufB] = reg | bit | VIA1B_vRTCClk;
195 * Execute a VIA PRAM/RTC command. For read commands
196 * data should point to a one-byte buffer for the
197 * resulting data. For write commands it should point
198 * to the data byte to for the command.
200 * This function disables all interrupts while running.
203 static void via_pram_command(int command, __u8 *data)
208 local_irq_save(flags);
210 /* Enable the RTC and make sure the strobe line is high */
212 via1[vBufB] = (via1[vBufB] | VIA1B_vRTCClk) & ~VIA1B_vRTCEnb;
214 if (command & 0xFF00) { /* extended (two-byte) command */
215 via_pram_writebyte((command & 0xFF00) >> 8);
216 via_pram_writebyte(command & 0xFF);
217 is_read = command & 0x8000;
218 } else { /* one-byte command */
219 via_pram_writebyte(command);
220 is_read = command & 0x80;
223 *data = via_pram_readbyte();
225 via_pram_writebyte(*data);
228 /* All done, disable the RTC */
230 via1[vBufB] |= VIA1B_vRTCEnb;
232 local_irq_restore(flags);
235 static __u8 via_read_pram(int offset)
240 static void via_write_pram(int offset, __u8 data)
245 * Return the current time in seconds since January 1, 1904.
247 * This only works on machines with the VIA-based PRAM/RTC, which
248 * is basically any machine with Mac II-style ADB.
251 static long via_read_time(void)
256 } result, last_result;
259 via_pram_command(0x81, &last_result.cdata[3]);
260 via_pram_command(0x85, &last_result.cdata[2]);
261 via_pram_command(0x89, &last_result.cdata[1]);
262 via_pram_command(0x8D, &last_result.cdata[0]);
265 * The NetBSD guys say to loop until you get the same reading
270 via_pram_command(0x81, &result.cdata[3]);
271 via_pram_command(0x85, &result.cdata[2]);
272 via_pram_command(0x89, &result.cdata[1]);
273 via_pram_command(0x8D, &result.cdata[0]);
275 if (result.idata == last_result.idata)
276 return result.idata - RTC_OFFSET;
281 last_result.idata = result.idata;
284 pr_err("via_read_time: failed to read a stable value; got 0x%08lx then 0x%08lx\n",
285 last_result.idata, result.idata);
291 * Set the current time to a number of seconds since January 1, 1904.
293 * This only works on machines with the VIA-based PRAM/RTC, which
294 * is basically any machine with Mac II-style ADB.
297 static void via_write_time(long time)
305 /* Clear the write protect bit */
308 via_pram_command(0x35, &temp);
310 data.idata = time + RTC_OFFSET;
311 via_pram_command(0x01, &data.cdata[3]);
312 via_pram_command(0x05, &data.cdata[2]);
313 via_pram_command(0x09, &data.cdata[1]);
314 via_pram_command(0x0D, &data.cdata[0]);
316 /* Set the write protect bit */
319 via_pram_command(0x35, &temp);
322 static void via_shutdown(void)
325 via2[rBufB] &= ~0x04;
327 /* Direction of vDirB is output */
329 /* Send a value of 0 on that line */
330 via2[vBufB] &= ~0x04;
336 * FIXME: not sure how this is supposed to work exactly...
339 static void oss_shutdown(void)
341 oss->rom_ctrl = OSS_POWEROFF;
344 #ifdef CONFIG_ADB_CUDA
346 static void cuda_restart(void)
348 struct adb_request req;
349 if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM) < 0)
351 while (!req.complete)
355 static void cuda_shutdown(void)
357 struct adb_request req;
358 if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN) < 0)
361 /* Avoid infinite polling loop when PSU is not under Cuda control */
362 switch (macintosh_config->ident) {
365 case MAC_MODEL_Q605_ACC:
367 case MAC_MODEL_P475F:
371 while (!req.complete)
375 #endif /* CONFIG_ADB_CUDA */
377 #ifdef CONFIG_ADB_PMU68K
379 void pmu_restart(void)
381 struct adb_request req;
382 if (pmu_request(&req, NULL,
383 2, PMU_SET_INTR_MASK, PMU_INT_ADB|PMU_INT_TICK) < 0)
385 while (!req.complete)
387 if (pmu_request(&req, NULL, 1, PMU_RESET) < 0)
389 while (!req.complete)
393 void pmu_shutdown(void)
395 struct adb_request req;
396 if (pmu_request(&req, NULL,
397 2, PMU_SET_INTR_MASK, PMU_INT_ADB|PMU_INT_TICK) < 0)
399 while (!req.complete)
401 if (pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 'M', 'A', 'T', 'T') < 0)
403 while (!req.complete)
410 *-------------------------------------------------------------------
411 * Below this point are the generic routines; they'll dispatch to the
412 * correct routine for the hardware on which we're running.
413 *-------------------------------------------------------------------
416 void mac_pram_read(int offset, __u8 *buffer, int len)
421 switch(macintosh_config->adb_type) {
424 func = pmu_read_pram; break;
427 func = cuda_read_pram; break;
429 func = via_read_pram;
433 for (i = 0 ; i < len ; i++) {
434 buffer[i] = (*func)(offset++);
438 void mac_pram_write(int offset, __u8 *buffer, int len)
440 void (*func)(int, __u8);
443 switch(macintosh_config->adb_type) {
446 func = pmu_write_pram; break;
449 func = cuda_write_pram; break;
451 func = via_write_pram;
455 for (i = 0 ; i < len ; i++) {
456 (*func)(offset++, buffer[i]);
460 void mac_poweroff(void)
464 } else if (macintosh_config->adb_type == MAC_ADB_II) {
466 #ifdef CONFIG_ADB_CUDA
467 } else if (macintosh_config->adb_type == MAC_ADB_EGRET ||
468 macintosh_config->adb_type == MAC_ADB_CUDA) {
471 #ifdef CONFIG_ADB_PMU68K
472 } else if (macintosh_config->adb_type == MAC_ADB_PB1
473 || macintosh_config->adb_type == MAC_ADB_PB2) {
478 pr_crit("It is now safe to turn off your Macintosh.\n");
485 if (macintosh_config->adb_type == MAC_ADB_II) {
488 /* need ROMBASE in booter */
489 /* indeed, plus need to MAP THE ROM !! */
491 if (mac_bi_data.rombase == 0)
492 mac_bi_data.rombase = 0x40800000;
495 rom_reset = (void *) (mac_bi_data.rombase + 0xa);
497 if (macintosh_config->ident == MAC_MODEL_SE30) {
499 * MSch: Machines known to crash on ROM reset ...
502 local_irq_save(flags);
506 local_irq_restore(flags);
508 #ifdef CONFIG_ADB_CUDA
509 } else if (macintosh_config->adb_type == MAC_ADB_EGRET ||
510 macintosh_config->adb_type == MAC_ADB_CUDA) {
513 #ifdef CONFIG_ADB_PMU68K
514 } else if (macintosh_config->adb_type == MAC_ADB_PB1
515 || macintosh_config->adb_type == MAC_ADB_PB2) {
518 } else if (CPU_IS_030) {
520 /* 030-specific reset routine. The idea is general, but the
521 * specific registers to reset are '030-specific. Until I
522 * have a non-030 machine, I can't test anything else.
523 * -- C. Scott Ananian <cananian@alumni.princeton.edu>
526 unsigned long rombase = 0x40000000;
528 /* make a 1-to-1 mapping, using the transparent tran. reg. */
529 unsigned long virt = (unsigned long) mac_reset;
530 unsigned long phys = virt_to_phys(mac_reset);
531 unsigned long addr = (phys&0xFF000000)|0x8777;
532 unsigned long offset = phys-virt;
533 local_irq_disable(); /* lets not screw this up, ok? */
534 __asm__ __volatile__(".chip 68030\n\t"
538 /* Now jump to physical address so we can disable MMU */
539 __asm__ __volatile__(
541 "lea %/pc@(1f),%/a0\n\t"
542 "addl %0,%/a0\n\t"/* fixup target address and stack ptr */
545 "jmp %/a0@\n\t" /* jump into physical memory */
546 "0:.long 0\n\t" /* a constant zero. */
547 /* OK. Now reset everything and jump to reset vector. */
549 "lea %/pc@(0b),%/a0\n\t"
550 "pmove %/a0@, %/tc\n\t" /* disable mmu */
551 "pmove %/a0@, %/tt0\n\t" /* disable tt0 */
552 "pmove %/a0@, %/tt1\n\t" /* disable tt1 */
554 "movec %/a0, %/vbr\n\t" /* clear vector base register */
555 "movec %/a0, %/cacr\n\t" /* disable caches */
556 "movel #0x0808,%/a0\n\t"
557 "movec %/a0, %/cacr\n\t" /* flush i&d caches */
558 "movew #0x2700,%/sr\n\t" /* set up status register */
559 "movel %1@(0x0),%/a0\n\t"/* load interrupt stack pointer */
560 "movec %/a0, %/isp\n\t"
561 "movel %1@(0x4),%/a0\n\t" /* load reset vector */
562 "reset\n\t" /* reset external devices */
563 "jmp %/a0@\n\t" /* jump to the reset vector */
565 : : "r" (offset), "a" (rombase) : "a0");
568 /* should never get here */
569 pr_crit("Restart failed. Please restart manually.\n");
575 * This function translates seconds since 1970 into a proper date.
577 * Algorithm cribbed from glibc2.1, __offtime().
579 #define SECS_PER_MINUTE (60)
580 #define SECS_PER_HOUR (SECS_PER_MINUTE * 60)
581 #define SECS_PER_DAY (SECS_PER_HOUR * 24)
583 static void unmktime(unsigned long time, long offset,
584 int *yearp, int *monp, int *dayp,
585 int *hourp, int *minp, int *secp)
587 /* How many days come before each month (0-12). */
588 static const unsigned short int __mon_yday[2][13] =
591 { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
593 { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
595 long int days, rem, y, wday, yday;
596 const unsigned short int *ip;
598 days = time / SECS_PER_DAY;
599 rem = time % SECS_PER_DAY;
605 while (rem >= SECS_PER_DAY) {
609 *hourp = rem / SECS_PER_HOUR;
610 rem %= SECS_PER_HOUR;
611 *minp = rem / SECS_PER_MINUTE;
612 *secp = rem % SECS_PER_MINUTE;
613 /* January 1, 1970 was a Thursday. */
614 wday = (4 + days) % 7; /* Day in the week. Not currently used */
615 if (wday < 0) wday += 7;
618 #define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
619 #define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
620 #define __isleap(year) \
621 ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
623 while (days < 0 || days >= (__isleap (y) ? 366 : 365))
625 /* Guess a corrected year, assuming 365 days per year. */
626 long int yg = y + days / 365 - (days % 365 < 0);
628 /* Adjust DAYS and Y to match the guessed year. */
629 days -= ((yg - y) * 365
630 + LEAPS_THRU_END_OF (yg - 1)
631 - LEAPS_THRU_END_OF (y - 1));
635 yday = days; /* day in the year. Not currently used. */
636 ip = __mon_yday[__isleap(y)];
637 for (y = 11; days < (long int) ip[y]; --y)
641 *dayp = days + 1; /* day in the month */
646 * Read/write the hardware clock.
649 int mac_hwclk(int op, struct rtc_time *t)
653 if (!op) { /* read */
654 switch (macintosh_config->adb_type) {
657 now = via_read_time();
661 now = pmu_read_time();
665 now = cuda_read_time();
673 &t->tm_year, &t->tm_mon, &t->tm_mday,
674 &t->tm_hour, &t->tm_min, &t->tm_sec);
675 pr_debug("%s: read %04d-%02d-%-2d %02d:%02d:%02d\n",
676 __func__, t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
677 t->tm_hour, t->tm_min, t->tm_sec);
679 pr_debug("%s: tried to write %04d-%02d-%-2d %02d:%02d:%02d\n",
680 __func__, t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
681 t->tm_hour, t->tm_min, t->tm_sec);
683 now = mktime(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
684 t->tm_hour, t->tm_min, t->tm_sec);
686 switch (macintosh_config->adb_type) {
693 cuda_write_time(now);
705 * Set minutes/seconds in the hardware clock
708 int mac_set_clock_mmss (unsigned long nowtime)
713 now.tm_sec = nowtime % 60;
714 now.tm_min = (nowtime / 60) % 60;