1 // SPDX-License-Identifier: GPL-2.0
3  * Miscellaneous Mac68K-specific stuff
30  * Offset between Unix time (1970-based) and Mac time (1904-based). Cuda and PMU
32  * need to be changed to interpret wrapped times as post-2040.
41 static unsigned char cuda_pram_read_byte(int offset)  in cuda_pram_read_byte()  argument
46 			 (offset >> 8) & 0xFF, offset & 0xFF) < 0)  in cuda_pram_read_byte()
53 static void cuda_pram_write_byte(unsigned char data, int offset)  in cuda_pram_write_byte()  argument
58 			 (offset >> 8) & 0xFF, offset & 0xFF, data) < 0)  in cuda_pram_write_byte()
66 static unsigned char pmu_pram_read_byte(int offset)  in pmu_pram_read_byte()  argument
71 	                offset & 0xFF, 1) < 0)  in pmu_pram_read_byte()
78 static void pmu_pram_write_byte(unsigned char data, int offset)  in pmu_pram_write_byte()  argument
83 	                offset & 0xFF, 1, data) < 0)  in pmu_pram_write_byte()
156  * Inside Mac has no information about two-byte RTC commands but
167  * data should point to a one-byte buffer for the
189 	if (command & 0xFF00) {		/* extended (two-byte) command */  in via_rtc_command()
193 	} else {			/* one-byte command */  in via_rtc_command()
211 static unsigned char via_pram_read_byte(int offset)  in via_pram_read_byte()  argument
215 	via_rtc_command(RTC_CMD_XPRAM_READ | RTC_CMD_XPRAM_ARG(offset), &temp);  in via_pram_read_byte()
220 static void via_pram_write_byte(unsigned char data, int offset)  in via_pram_write_byte()  argument
228 	via_rtc_command(RTC_CMD_XPRAM_WRITE | RTC_CMD_XPRAM_ARG(offset), &temp);  in via_pram_write_byte()
238  * This only works on machines with the VIA-based PRAM/RTC, which
239  * is basically any machine with Mac II-style ADB.
271 			return (time64_t)result.idata - RTC_OFFSET;  in via_read_time()
288  * This only works on machines with the VIA-based PRAM/RTC, which
289  * is basically any machine with Mac II-style ADB.
301 	time = mktime64(tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,  in via_set_rtc_time()
302 	                tm->tm_hour, tm->tm_min, tm->tm_sec);  in via_set_rtc_time()
336 	oss->rom_ctrl = OSS_POWEROFF;  in oss_shutdown()
358 	switch (macintosh_config->ident) {  in cuda_shutdown()
373  *-------------------------------------------------------------------
376  *-------------------------------------------------------------------
382 	switch (macintosh_config->adb_type) {  in mac_pram_read_byte()
403 	switch (macintosh_config->adb_type) {  in mac_pram_write_byte()
435 	} else if (macintosh_config->adb_type == MAC_ADB_II) {  in mac_poweroff()
438 	} else if (macintosh_config->adb_type == MAC_ADB_EGRET ||  in mac_poweroff()
439 	           macintosh_config->adb_type == MAC_ADB_CUDA) {  in mac_poweroff()
443 	} else if (macintosh_config->adb_type == MAC_ADB_PB2) {  in mac_poweroff()
455 	if (macintosh_config->adb_type == MAC_ADB_II &&  in mac_reset()
456 	    macintosh_config->ident != MAC_MODEL_SE30) {  in mac_reset()
469 	} else if (macintosh_config->adb_type == MAC_ADB_EGRET ||  in mac_reset()
470 	           macintosh_config->adb_type == MAC_ADB_CUDA) {  in mac_reset()
474 	} else if (macintosh_config->adb_type == MAC_ADB_PB2) {  in mac_reset()
479 		/* 030-specific reset routine.  The idea is general, but the  in mac_reset()
480 		 * specific registers to reset are '030-specific.  Until I  in mac_reset()
481 		 * have a non-030 machine, I can't test anything else.  in mac_reset()
482 		 *  -- C. Scott Ananian <cananian@alumni.princeton.edu>  in mac_reset()
487 		/* make a 1-to-1 mapping, using the transparent tran. reg. */  in mac_reset()
491 		unsigned long offset = phys-virt;  in mac_reset()  local
525 		    : : "r" (offset), "a" (rombase) : "a0");  in mac_reset()
546 static void unmktime(time64_t time, long offset,  in unmktime()  argument
550         /* How many days come before each month (0-12).  */  in unmktime()
558 	int days, rem, y, wday, yday;  in unmktime()  local
562 	rem += offset;  in unmktime()
565 		--days;  in unmktime()
568 		rem -= SECS_PER_DAY;  in unmktime()
578 	y = 1970;  in unmktime()
580 #define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))  in unmktime()
581 #define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))  in unmktime()  argument
585 	while (days < 0 || days >= (__isleap (y) ? 366 : 365))  in unmktime()
588 		long int yg = y + days / 365 - (days % 365 < 0);  in unmktime()
590 		/* Adjust DAYS and Y to match the guessed year.  */  in unmktime()
591 		days -= (yg - y) * 365 +  in unmktime()
592 			LEAPS_THRU_END_OF(yg - 1) - LEAPS_THRU_END_OF(y - 1);  in unmktime()
593 		y = yg;  in unmktime()
595 	*yearp = y - 1900;  in unmktime()
597 	ip = __mon_yday[__isleap(y)];  in unmktime()
598 	for (y = 11; days < (long int) ip[y]; --y)  in unmktime()
600 	days -= ip[y];  in unmktime()
601 	*monp = y;  in unmktime()
615 		switch (macintosh_config->adb_type) {  in mac_hwclk()
636 		t->tm_wday = 0;  in mac_hwclk()
638 			 &t->tm_year, &t->tm_mon, &t->tm_mday,  in mac_hwclk()
639 			 &t->tm_hour, &t->tm_min, &t->tm_sec);  in mac_hwclk()
644 		switch (macintosh_config->adb_type) {  in mac_hwclk()
662 			return -ENODEV;  in mac_hwclk()