1 /* $NetBSD: gfrtc_mainbus.c,v 1.3 2024/03/05 11:19:30 isaki Exp $ */ 2 3 /*- 4 * Copyright (c) 2023, 2024 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Nick Hudson and by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: gfrtc_mainbus.c,v 1.3 2024/03/05 11:19:30 isaki Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/bus.h> 37 #include <sys/device.h> 38 #include <sys/intr.h> 39 #include <sys/systm.h> 40 41 #include <machine/clockvar.h> 42 43 #include <virt68k/dev/mainbusvar.h> 44 45 #include <dev/goldfish/gfrtcvar.h> 46 47 static const struct device_compatible_entry compat_data[] = { 48 { .compat = "google,goldfish-rtc", 49 .value = CLOCK_NONE }, 50 51 { .compat = "netbsd,goldfish-rtc-hardclock", 52 .value = CLOCK_HARDCLOCK }, 53 54 DEVICE_COMPAT_EOL 55 }; 56 57 struct gfrtc_mainbus_softc { 58 struct gfrtc_softc sc_gfrtc; 59 struct clock_attach_args sc_clock_args; 60 uint64_t sc_interval_ns; 61 uint64_t sc_alarm_time; 62 void (*sc_handler)(struct clockframe *); 63 struct evcnt * sc_evcnt; 64 void * sc_ih; 65 }; 66 67 #define CLOCK_HANDLER() \ 68 do { \ 69 /* Clear the interrupt condition. */ \ 70 gfrtc_clear_interrupt(&sc->sc_gfrtc); \ 71 \ 72 /* Get the next alarm set. */ \ 73 sc->sc_alarm_time += sc->sc_interval_ns; \ 74 gfrtc_set_alarm(&sc->sc_gfrtc, sc->sc_alarm_time); \ 75 \ 76 /* Increment the counter and call the handler. */ \ 77 sc->sc_evcnt->ev_count++; \ 78 sc->sc_handler((struct clockframe *)v); \ 79 } while (/*CONSTCOND*/0) 80 81 static int 82 gfrtc_mainbus_hardclock(void *v) 83 { 84 struct gfrtc_mainbus_softc *sc = clock_devices[CLOCK_HARDCLOCK]; 85 86 CLOCK_HANDLER(); 87 return 1; 88 } 89 90 static void *gfrtc_isrs[] = { 91 [CLOCK_HARDCLOCK] = gfrtc_mainbus_hardclock, 92 }; 93 94 static void 95 gfrtc_mainbus_initclock(void *arg, unsigned int interval_us, 96 struct evcnt *ev, void (*func)(struct clockframe *)) 97 { 98 struct gfrtc_mainbus_softc *sc = arg; 99 100 sc->sc_interval_ns = (uint64_t)interval_us * 1000; 101 sc->sc_handler = func; 102 sc->sc_evcnt = ev; 103 104 /* Enable the interrupt. */ 105 gfrtc_enable_interrupt(&sc->sc_gfrtc); 106 107 /* Start the first alarm! */ 108 sc->sc_alarm_time = gfrtc_get_time(&sc->sc_gfrtc) + sc->sc_interval_ns; 109 gfrtc_set_alarm(&sc->sc_gfrtc, sc->sc_alarm_time); 110 } 111 112 static int 113 gfrtc_mainbus_match(device_t parent, cfdata_t cf, void *aux) 114 { 115 struct mainbus_attach_args * const ma = aux; 116 117 return mainbus_compatible_match(ma, compat_data); 118 } 119 120 static void 121 gfrtc_mainbus_attach(device_t parent, device_t self, void *aux) 122 { 123 struct gfrtc_mainbus_softc * const sc = device_private(self); 124 struct mainbus_attach_args * const ma = aux; 125 const struct device_compatible_entry *dce; 126 char strbuf[INTR_STRING_BUFSIZE]; 127 128 sc->sc_gfrtc.sc_dev = self; 129 sc->sc_gfrtc.sc_bst = ma->ma_st; 130 if (bus_space_map(sc->sc_gfrtc.sc_bst, ma->ma_addr, ma->ma_size, 0, 131 &sc->sc_gfrtc.sc_bsh) != 0) { 132 aprint_error(": couldn't map registers\n"); 133 return; 134 } 135 136 dce = mainbus_compatible_lookup(ma, compat_data); 137 KASSERT(dce != NULL); 138 139 gfrtc_attach(&sc->sc_gfrtc, (dce->value == CLOCK_NONE)); 140 141 switch (dce->value) { 142 case CLOCK_HARDCLOCK: 143 /* 144 * We are the one of the clock interrupts. 145 */ 146 sc->sc_ih = intr_establish(gfrtc_isrs[(int)dce->value], 147 NULL, ma->ma_irq, IPL_SCHED, 0); 148 KASSERT(sc->sc_ih != NULL); 149 aprint_normal_dev(self, "%s interrupting at %s\n", 150 clock_name((int)dce->value), 151 intr_string(sc->sc_ih, strbuf, sizeof(strbuf))); 152 sc->sc_clock_args.ca_initfunc = gfrtc_mainbus_initclock; 153 sc->sc_clock_args.ca_arg = sc; 154 sc->sc_clock_args.ca_which = (int)dce->value; 155 clock_attach(self, &sc->sc_clock_args, gfrtc_delay); 156 break; 157 158 default: 159 break; 160 } 161 } 162 163 CFATTACH_DECL_NEW(gfrtc_mainbus, sizeof(struct gfrtc_mainbus_softc), 164 gfrtc_mainbus_match, gfrtc_mainbus_attach, NULL, NULL); 165
Indexes created Sat Sep 20 22:09:52 GMT 2025