2 * Miscellaneous Mac68K-specific stuff
5 #include <linux/config.h>
6 #include <linux/types.h>
7 #include <linux/errno.h>
8 #include <linux/miscdevice.h>
9 #include <linux/kernel.h>
10 #include <linux/delay.h>
11 #include <linux/sched.h>
12 #include <linux/slab.h>
13 #include <linux/time.h>
14 #include <linux/rtc.h>
17 #include <linux/adb.h>
18 #include <linux/cuda.h>
19 #include <linux/pmu.h>
21 #include <asm/uaccess.h>
24 #include <asm/system.h>
25 #include <asm/segment.h>
26 #include <asm/setup.h>
27 #include <asm/macintosh.h>
28 #include <asm/mac_via.h>
29 #include <asm/mac_oss.h>
31 #define BOOTINFO_COMPAT_1_0
32 #include <asm/bootinfo.h>
33 #include <asm/machdep.h>
35 /* Offset between Unix time (1970-based) and Mac time (1904-based) */
37 #define RTC_OFFSET 2082844800
39 extern struct mac_booter_data mac_bi_data;
40 static void (*rom_reset)(void);
42 #ifdef CONFIG_ADB_CUDA
43 static long cuda_read_time(void)
45 struct adb_request req;
48 if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME) < 0)
53 time = (req.reply[3] << 24) | (req.reply[4] << 16)
54 | (req.reply[5] << 8) | req.reply[6];
55 return time - RTC_OFFSET;
58 static void cuda_write_time(long data)
60 struct adb_request req;
62 if (cuda_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME,
63 (data >> 24) & 0xFF, (data >> 16) & 0xFF,
64 (data >> 8) & 0xFF, data & 0xFF) < 0)
70 static __u8 cuda_read_pram(int offset)
72 struct adb_request req;
73 if (cuda_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
74 (offset >> 8) & 0xFF, offset & 0xFF) < 0)
81 static void cuda_write_pram(int offset, __u8 data)
83 struct adb_request req;
84 if (cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
85 (offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
91 #define cuda_read_time() 0
92 #define cuda_write_time(n)
93 #define cuda_read_pram NULL
94 #define cuda_write_pram NULL
97 #ifdef CONFIG_ADB_PMU68K
98 static long pmu_read_time(void)
100 struct adb_request req;
103 if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
105 while (!req.complete)
108 time = (req.reply[0] << 24) | (req.reply[1] << 16)
109 | (req.reply[2] << 8) | req.reply[3];
110 return time - RTC_OFFSET;
113 static void pmu_write_time(long data)
115 struct adb_request req;
117 if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
118 (data >> 24) & 0xFF, (data >> 16) & 0xFF,
119 (data >> 8) & 0xFF, data & 0xFF) < 0)
121 while (!req.complete)
125 static __u8 pmu_read_pram(int offset)
127 struct adb_request req;
128 if (pmu_request(&req, NULL, 3, PMU_READ_NVRAM,
129 (offset >> 8) & 0xFF, offset & 0xFF) < 0)
131 while (!req.complete)
136 static void pmu_write_pram(int offset, __u8 data)
138 struct adb_request req;
139 if (pmu_request(&req, NULL, 4, PMU_WRITE_NVRAM,
140 (offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
142 while (!req.complete)
146 #define pmu_read_time() 0
147 #define pmu_write_time(n)
148 #define pmu_read_pram NULL
149 #define pmu_write_pram NULL
152 #ifdef CONFIG_ADB_MACIISI
153 extern int maciisi_request(struct adb_request *req,
154 void (*done)(struct adb_request *), int nbytes, ...);
156 static long maciisi_read_time(void)
158 struct adb_request req;
161 if (maciisi_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME))
164 time = (req.reply[3] << 24) | (req.reply[4] << 16)
165 | (req.reply[5] << 8) | req.reply[6];
166 return time - RTC_OFFSET;
169 static void maciisi_write_time(long data)
171 struct adb_request req;
173 maciisi_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME,
174 (data >> 24) & 0xFF, (data >> 16) & 0xFF,
175 (data >> 8) & 0xFF, data & 0xFF);
178 static __u8 maciisi_read_pram(int offset)
180 struct adb_request req;
181 if (maciisi_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
182 (offset >> 8) & 0xFF, offset & 0xFF))
187 static void maciisi_write_pram(int offset, __u8 data)
189 struct adb_request req;
190 maciisi_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
191 (offset >> 8) & 0xFF, offset & 0xFF, data);
194 #define maciisi_read_time() 0
195 #define maciisi_write_time(n)
196 #define maciisi_read_pram NULL
197 #define maciisi_write_pram NULL
201 * VIA PRAM/RTC access routines
203 * Must be called with interrupts disabled and
204 * the RTC should be enabled.
207 static __u8 via_pram_readbyte(void)
212 reg = via1[vBufB] & ~VIA1B_vRTCClk;
214 /* Set the RTC data line to be an input. */
216 via1[vDirB] &= ~VIA1B_vRTCData;
218 /* The bits of the byte come out in MSB order */
221 for (i = 0 ; i < 8 ; i++) {
223 via1[vBufB] = reg | VIA1B_vRTCClk;
224 data = (data << 1) | (via1[vBufB] & VIA1B_vRTCData);
227 /* Return RTC data line to output state */
229 via1[vDirB] |= VIA1B_vRTCData;
234 static void via_pram_writebyte(__u8 data)
238 reg = via1[vBufB] & ~(VIA1B_vRTCClk | VIA1B_vRTCData);
240 /* The bits of the byte go in in MSB order */
242 for (i = 0 ; i < 8 ; i++) {
243 bit = data & 0x80? 1 : 0;
245 via1[vBufB] = reg | bit;
246 via1[vBufB] = reg | bit | VIA1B_vRTCClk;
251 * Execute a VIA PRAM/RTC command. For read commands
252 * data should point to a one-byte buffer for the
253 * resulting data. For write commands it should point
254 * to the data byte to for the command.
256 * This function disables all interrupts while running.
259 static void via_pram_command(int command, __u8 *data)
264 local_irq_save(flags);
266 /* Enable the RTC and make sure the strobe line is high */
268 via1[vBufB] = (via1[vBufB] | VIA1B_vRTCClk) & ~VIA1B_vRTCEnb;
270 if (command & 0xFF00) { /* extended (two-byte) command */
271 via_pram_writebyte((command & 0xFF00) >> 8);
272 via_pram_writebyte(command & 0xFF);
273 is_read = command & 0x8000;
274 } else { /* one-byte command */
275 via_pram_writebyte(command);
276 is_read = command & 0x80;
279 *data = via_pram_readbyte();
281 via_pram_writebyte(*data);
284 /* All done, disable the RTC */
286 via1[vBufB] |= VIA1B_vRTCEnb;
288 local_irq_restore(flags);
291 static __u8 via_read_pram(int offset)
296 static void via_write_pram(int offset, __u8 data)
301 * Return the current time in seconds since January 1, 1904.
303 * This only works on machines with the VIA-based PRAM/RTC, which
304 * is basically any machine with Mac II-style ADB.
307 static long via_read_time(void)
312 } result, last_result;
316 * The NetBSD guys say to loop until you get the same reading
323 printk("via_read_time: couldn't get valid time, "
324 "last read = 0x%08lx and 0x%08lx\n",
325 last_result.idata, result.idata);
329 last_result.idata = result.idata;
332 via_pram_command(0x81, &result.cdata[3]);
333 via_pram_command(0x85, &result.cdata[2]);
334 via_pram_command(0x89, &result.cdata[1]);
335 via_pram_command(0x8D, &result.cdata[0]);
336 } while (result.idata != last_result.idata);
338 return result.idata - RTC_OFFSET;
342 * Set the current time to a number of seconds since January 1, 1904.
344 * This only works on machines with the VIA-based PRAM/RTC, which
345 * is basically any machine with Mac II-style ADB.
348 static void via_write_time(long time)
356 /* Clear the write protect bit */
359 via_pram_command(0x35, &temp);
361 data.idata = time + RTC_OFFSET;
362 via_pram_command(0x01, &data.cdata[3]);
363 via_pram_command(0x05, &data.cdata[2]);
364 via_pram_command(0x09, &data.cdata[1]);
365 via_pram_command(0x0D, &data.cdata[0]);
367 /* Set the write protect bit */
370 via_pram_command(0x35, &temp);
373 static void via_shutdown(void)
376 via2[rBufB] &= ~0x04;
378 /* Direction of vDirB is output */
380 /* Send a value of 0 on that line */
381 via2[vBufB] &= ~0x04;
387 * FIXME: not sure how this is supposed to work exactly...
390 static void oss_shutdown(void)
392 oss->rom_ctrl = OSS_POWEROFF;
395 #ifdef CONFIG_ADB_CUDA
397 static void cuda_restart(void)
399 struct adb_request req;
400 if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM) < 0)
402 while (!req.complete)
406 static void cuda_shutdown(void)
408 struct adb_request req;
409 if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN) < 0)
411 while (!req.complete)
415 #endif /* CONFIG_ADB_CUDA */
417 #ifdef CONFIG_ADB_PMU68K
419 void pmu_restart(void)
421 struct adb_request req;
422 if (pmu_request(&req, NULL,
423 2, PMU_SET_INTR_MASK, PMU_INT_ADB|PMU_INT_TICK) < 0)
425 while (!req.complete)
427 if (pmu_request(&req, NULL, 1, PMU_RESET) < 0)
429 while (!req.complete)
433 void pmu_shutdown(void)
435 struct adb_request req;
436 if (pmu_request(&req, NULL,
437 2, PMU_SET_INTR_MASK, PMU_INT_ADB|PMU_INT_TICK) < 0)
439 while (!req.complete)
441 if (pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 'M', 'A', 'T', 'T') < 0)
443 while (!req.complete)
450 *-------------------------------------------------------------------
451 * Below this point are the generic routines; they'll dispatch to the
452 * correct routine for the hardware on which we're running.
453 *-------------------------------------------------------------------
456 void mac_pram_read(int offset, __u8 *buffer, int len)
461 switch(macintosh_config->adb_type) {
463 func = maciisi_read_pram; break;
466 func = pmu_read_pram; break;
468 func = cuda_read_pram; break;
470 func = via_read_pram;
474 for (i = 0 ; i < len ; i++) {
475 buffer[i] = (*func)(offset++);
479 void mac_pram_write(int offset, __u8 *buffer, int len)
481 void (*func)(int, __u8);
484 switch(macintosh_config->adb_type) {
486 func = maciisi_write_pram; break;
489 func = pmu_write_pram; break;
491 func = cuda_write_pram; break;
493 func = via_write_pram;
497 for (i = 0 ; i < len ; i++) {
498 (*func)(offset++, buffer[i]);
502 void mac_poweroff(void)
505 * MAC_ADB_IISI may need to be moved up here if it doesn't actually
506 * work using the ADB packet method. --David Kilzer
511 } else if (macintosh_config->adb_type == MAC_ADB_II) {
513 #ifdef CONFIG_ADB_CUDA
514 } else if (macintosh_config->adb_type == MAC_ADB_CUDA) {
517 #ifdef CONFIG_ADB_PMU68K
518 } else if (macintosh_config->adb_type == MAC_ADB_PB1
519 || macintosh_config->adb_type == MAC_ADB_PB2) {
524 printk("It is now safe to turn off your Macintosh.\n");
530 if (macintosh_config->adb_type == MAC_ADB_II) {
533 /* need ROMBASE in booter */
534 /* indeed, plus need to MAP THE ROM !! */
536 if (mac_bi_data.rombase == 0)
537 mac_bi_data.rombase = 0x40800000;
540 rom_reset = (void *) (mac_bi_data.rombase + 0xa);
542 if (macintosh_config->ident == MAC_MODEL_SE30) {
544 * MSch: Machines known to crash on ROM reset ...
547 local_irq_save(flags);
551 local_irq_restore(flags);
553 #ifdef CONFIG_ADB_CUDA
554 } else if (macintosh_config->adb_type == MAC_ADB_CUDA) {
557 #ifdef CONFIG_ADB_PMU68K
558 } else if (macintosh_config->adb_type == MAC_ADB_PB1
559 || macintosh_config->adb_type == MAC_ADB_PB2) {
562 } else if (CPU_IS_030) {
564 /* 030-specific reset routine. The idea is general, but the
565 * specific registers to reset are '030-specific. Until I
566 * have a non-030 machine, I can't test anything else.
567 * -- C. Scott Ananian <cananian@alumni.princeton.edu>
570 unsigned long rombase = 0x40000000;
572 /* make a 1-to-1 mapping, using the transparent tran. reg. */
573 unsigned long virt = (unsigned long) mac_reset;
574 unsigned long phys = virt_to_phys(mac_reset);
575 unsigned long addr = (phys&0xFF000000)|0x8777;
576 unsigned long offset = phys-virt;
577 local_irq_disable(); /* lets not screw this up, ok? */
578 __asm__ __volatile__(".chip 68030\n\t"
582 /* Now jump to physical address so we can disable MMU */
583 __asm__ __volatile__(
585 "lea %/pc@(1f),%/a0\n\t"
586 "addl %0,%/a0\n\t"/* fixup target address and stack ptr */
589 "jmp %/a0@\n\t" /* jump into physical memory */
590 "0:.long 0\n\t" /* a constant zero. */
591 /* OK. Now reset everything and jump to reset vector. */
593 "lea %/pc@(0b),%/a0\n\t"
594 "pmove %/a0@, %/tc\n\t" /* disable mmu */
595 "pmove %/a0@, %/tt0\n\t" /* disable tt0 */
596 "pmove %/a0@, %/tt1\n\t" /* disable tt1 */
598 "movec %/a0, %/vbr\n\t" /* clear vector base register */
599 "movec %/a0, %/cacr\n\t" /* disable caches */
600 "movel #0x0808,%/a0\n\t"
601 "movec %/a0, %/cacr\n\t" /* flush i&d caches */
602 "movew #0x2700,%/sr\n\t" /* set up status register */
603 "movel %1@(0x0),%/a0\n\t"/* load interrupt stack pointer */
604 "movec %/a0, %/isp\n\t"
605 "movel %1@(0x4),%/a0\n\t" /* load reset vector */
606 "reset\n\t" /* reset external devices */
607 "jmp %/a0@\n\t" /* jump to the reset vector */
609 : : "r" (offset), "a" (rombase) : "a0");
612 /* should never get here */
614 printk ("Restart failed. Please restart manually.\n");
619 * This function translates seconds since 1970 into a proper date.
621 * Algorithm cribbed from glibc2.1, __offtime().
623 #define SECS_PER_MINUTE (60)
624 #define SECS_PER_HOUR (SECS_PER_MINUTE * 60)
625 #define SECS_PER_DAY (SECS_PER_HOUR * 24)
627 static void unmktime(unsigned long time, long offset,
628 int *yearp, int *monp, int *dayp,
629 int *hourp, int *minp, int *secp)
631 /* How many days come before each month (0-12). */
632 static const unsigned short int __mon_yday[2][13] =
635 { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
637 { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
639 long int days, rem, y, wday, yday;
640 const unsigned short int *ip;
642 days = time / SECS_PER_DAY;
643 rem = time % SECS_PER_DAY;
649 while (rem >= SECS_PER_DAY) {
653 *hourp = rem / SECS_PER_HOUR;
654 rem %= SECS_PER_HOUR;
655 *minp = rem / SECS_PER_MINUTE;
656 *secp = rem % SECS_PER_MINUTE;
657 /* January 1, 1970 was a Thursday. */
658 wday = (4 + days) % 7; /* Day in the week. Not currently used */
659 if (wday < 0) wday += 7;
662 #define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
663 #define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
664 #define __isleap(year) \
665 ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
667 while (days < 0 || days >= (__isleap (y) ? 366 : 365))
669 /* Guess a corrected year, assuming 365 days per year. */
670 long int yg = y + days / 365 - (days % 365 < 0);
672 /* Adjust DAYS and Y to match the guessed year. */
673 days -= ((yg - y) * 365
674 + LEAPS_THRU_END_OF (yg - 1)
675 - LEAPS_THRU_END_OF (y - 1));
679 yday = days; /* day in the year. Not currently used. */
680 ip = __mon_yday[__isleap(y)];
681 for (y = 11; days < (long int) ip[y]; --y)
685 *dayp = days + 1; /* day in the month */
690 * Read/write the hardware clock.
693 int mac_hwclk(int op, struct rtc_time *t)
697 if (!op) { /* read */
698 switch (macintosh_config->adb_type) {
701 now = via_read_time();
704 now = maciisi_read_time();
708 now = pmu_read_time();
711 now = cuda_read_time();
719 &t->tm_year, &t->tm_mon, &t->tm_mday,
720 &t->tm_hour, &t->tm_min, &t->tm_sec);
721 printk("mac_hwclk: read %04d-%02d-%-2d %02d:%02d:%02d\n",
722 t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, t->tm_hour, t->tm_min, t->tm_sec);
724 printk("mac_hwclk: tried to write %04d-%02d-%-2d %02d:%02d:%02d\n",
725 t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, t->tm_hour, t->tm_min, t->tm_sec);
727 #if 0 /* it trashes my rtc */
728 now = mktime(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
729 t->tm_hour, t->tm_min, t->tm_sec);
731 switch (macintosh_config->adb_type) {
737 cuda_write_time(now);
744 maciisi_write_time(now);
752 * Set minutes/seconds in the hardware clock
755 int mac_set_clock_mmss (unsigned long nowtime)
760 now.tm_sec = nowtime % 60;
761 now.tm_min = (nowtime / 60) % 60;