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      1 /*	$NetBSD: clock.c,v 1.12 2023/11/05 21:54:27 andvar Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: clock.c,v 1.12 2023/11/05 21:54:27 andvar Exp $");
     31 
     32 #include "debug_playstation2.h"
     33 
     34 #include <sys/param.h>
     35 #include <sys/systm.h>
     36 #include <sys/kernel.h>		/* time */
     37 #include <sys/proc.h>
     38 
     39 #include <mips/locore.h>
     40 #include <mips/mips3_clock.h>
     41 
     42 #include <dev/clock_subr.h>
     43 #include <machine/bootinfo.h>
     44 
     45 #include <playstation2/ee/timervar.h>
     46 
     47 static int get_bootinfo_tod(todr_chip_handle_t, struct clock_ymdhms *);
     48 
     49 void
     50 cpu_initclocks(void)
     51 {
     52 	struct todr_chip_handle	todr = {
     53 		.todr_gettime_ymdhms = get_bootinfo_tod,
     54 	};
     55 
     56 	/*
     57 	 *  PS2 R5900 CPU clock is 294.912 MHz = (1 << 15) * 9 * 1000
     58 	 */
     59 	curcpu()->ci_cpu_freq = 294912000;
     60 
     61 	hz = 100;
     62 
     63 	/* Install clock interrupt */
     64 	timer_clock_init();
     65 
     66 	todr_attach(&todr);
     67 
     68 	mips3_init_tc();
     69 }
     70 
     71 void
     72 setstatclockrate(int arg)
     73 {
     74 	/* not yet */
     75 }
     76 
     77 static int
     78 get_bootinfo_tod(todr_chip_handle_t tch, struct clock_ymdhms *dt)
     79 {
     80 	time_t utc;
     81 	struct bootinfo_rtc *rtc =
     82 	    (void *)MIPS_PHYS_TO_KSEG1(BOOTINFO_BLOCK_BASE + BOOTINFO_RTC);
     83 
     84 	/* PS2 RTC is JST */
     85 	dt->dt_year = bcdtobin(rtc->year) + 2000;
     86 	dt->dt_mon = bcdtobin(rtc->mon);
     87 	dt->dt_day = bcdtobin(rtc->day);
     88 	dt->dt_hour = bcdtobin(rtc->hour);
     89 	dt->dt_min = bcdtobin(rtc->min);
     90 	dt->dt_sec = bcdtobin(rtc->sec);
     91 
     92 	/* convert to UTC */
     93 	utc = clock_ymdhms_to_secs(dt) - 9*60*60;
     94 	clock_secs_to_ymdhms(utc, dt);
     95 #ifdef DEBUG
     96         printf("bootinfo: %lld/%d/%d/%d/%d/%d rtc_offset %d\n", dt->dt_year,
     97 	    dt->dt_mon, dt->dt_day, dt->dt_hour, dt->dt_min, dt->dt_sec,
     98 	    rtc_offset);
     99 #endif
    100 	return 0;
    101 }
    102