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      1 /*	$NetBSD: vrtc.c,v 1.5 2025/09/07 21:45:15 thorpej Exp $	*/
      2 /*	$OpenBSD: vrtc.c,v 1.1 2008/03/08 19:19:43 kettenis Exp $	*/
      3 /*
      4  * Copyright (c) 2008 Mark Kettenis
      5  *
      6  * Permission to use, copy, modify, and distribute this software for any
      7  * purpose with or without fee is hereby granted, provided that the above
      8  * copyright notice and this permission notice appear in all copies.
      9  *
     10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     17  */
     18 
     19 #include <sys/param.h>
     20 #include <sys/device.h>
     21 #include <sys/kmem.h>
     22 #include <sys/systm.h>
     23 
     24 #include <machine/autoconf.h>
     25 #include <machine/hypervisor.h>
     26 #include <machine/openfirm.h>
     27 
     28 #include <dev/clock_subr.h>
     29 #include <sparc64/dev/vbusvar.h>
     30 
     31 static int	vrtc_match(device_t, cfdata_t, void *);
     32 static void	vrtc_attach(device_t, device_t, void *);
     33 
     34 struct vrtc_softc {
     35 	device_t	sc_dev;
     36 	struct todr_chip_handle sc_todr;
     37 };
     38 
     39 CFATTACH_DECL_NEW(vrtc, sizeof(struct vrtc_softc),
     40     vrtc_match, vrtc_attach, NULL, NULL);
     41 
     42 static int	vrtc_gettime(todr_chip_handle_t, struct timeval *);
     43 static int	vrtc_settime(todr_chip_handle_t, struct timeval *);
     44 
     45 static int
     46 vrtc_match(device_t parent, cfdata_t match, void *aux)
     47 {
     48 	struct vbus_attach_args *va = aux;
     49 
     50 	if (strcmp(va->va_name, "rtc") == 0)
     51 		return (1);
     52 
     53 	return (0);
     54 }
     55 
     56 static void
     57 vrtc_attach(device_t parent, device_t self, void *aux)
     58 {
     59 	struct vrtc_softc *sc = device_private(self);
     60 
     61 	printf("\n");
     62 
     63 	sc->sc_dev = self;
     64 	sc->sc_todr.todr_gettime = vrtc_gettime;
     65 	sc->sc_todr.todr_settime = vrtc_settime;
     66 
     67 	todr_attach(&sc->sc_todr);
     68 }
     69 
     70 static int
     71 vrtc_gettime(todr_chip_handle_t handle, struct timeval *tv)
     72 {
     73 	u_int64_t tod;
     74 
     75 	if (hv_tod_get(&tod) != H_EOK)
     76 		return (1);
     77 
     78 	tv->tv_sec = tod;
     79 	tv->tv_usec = 0;
     80 	return (0);
     81 }
     82 
     83 static int
     84 vrtc_settime(todr_chip_handle_t handle, struct timeval *tv)
     85 {
     86 	if (hv_tod_set(tv->tv_sec) != H_EOK)
     87 		return (1);
     88 
     89 	return (0);
     90 }
     91