1 /* $NetBSD: drbbc.c,v 1.22 2025/09/07 21:45:10 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Ignatios Souvatzis. 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: drbbc.c,v 1.22 2025/09/07 21:45:10 thorpej Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/kernel.h> 37 #include <sys/device.h> 38 #include <sys/systm.h> 39 40 #if 0 41 #include <machine/psl.h> 42 #endif 43 #include <machine/cpu.h> 44 #include <amiga/amiga/device.h> 45 #include <amiga/amiga/custom.h> 46 #include <amiga/amiga/cia.h> 47 #include <amiga/amiga/drcustom.h> 48 #include <amiga/dev/rtc.h> 49 50 #include <dev/clock_subr.h> 51 #include <dev/ic/ds.h> 52 53 static int draco_ds_read_bit(void *); 54 static void draco_ds_write_bit(void *, int); 55 static void draco_ds_reset(void *); 56 57 static void drbbc_attach(device_t, device_t, void *); 58 static int drbbc_match(device_t, cfdata_t, void *); 59 60 static int dracougettod(todr_chip_handle_t, struct timeval *); 61 static int dracousettod(todr_chip_handle_t, struct timeval *); 62 63 struct drbbc_softc { 64 device_t sc_dev; 65 struct ds_handle sc_dsh; 66 struct todr_chip_handle sc_todr; 67 }; 68 69 CFATTACH_DECL_NEW(drbbc, sizeof(struct drbbc_softc), 70 drbbc_match, drbbc_attach, NULL, NULL); 71 72 static int 73 drbbc_match(device_t parent, cfdata_t cf, void *aux) 74 { 75 static int drbbc_matched = 0; 76 77 /* Allow only one instance. */ 78 if (!is_draco() || !matchname(aux, "drbbc") || drbbc_matched) 79 return (0); 80 81 drbbc_matched = 1; 82 return (1); 83 } 84 85 static void 86 drbbc_attach(device_t parent, device_t self, void *aux) 87 { 88 int i; 89 struct drbbc_softc *sc; 90 u_int8_t rombuf[8]; 91 92 sc = device_private(self); 93 sc->sc_dev = self; 94 95 sc->sc_dsh.ds_read_bit = draco_ds_read_bit; 96 sc->sc_dsh.ds_write_bit = draco_ds_write_bit; 97 sc->sc_dsh.ds_reset = draco_ds_reset; 98 sc->sc_dsh.ds_hw_handle = (void *)(DRCCADDR + DRIOCTLPG*PAGE_SIZE); 99 100 sc->sc_dsh.ds_reset(sc->sc_dsh.ds_hw_handle); 101 102 ds_write_byte(&sc->sc_dsh, DS_ROM_READ); 103 for (i=0; i<8; ++i) 104 rombuf[i] = ds_read_byte(&sc->sc_dsh); 105 106 hostid = (rombuf[3] << 24) + (rombuf[2] << 16) + 107 (rombuf[1] << 8) + rombuf[7]; 108 109 printf(": ROM %02x %02x%02x%02x%02x%02x%02x %02x (DraCo sernum %ld)\n", 110 rombuf[7], rombuf[6], rombuf[5], rombuf[4], 111 rombuf[3], rombuf[2], rombuf[1], rombuf[0], 112 hostid); 113 114 sc->sc_todr.todr_dev = self; 115 sc->sc_todr.todr_gettime = dracougettod; 116 sc->sc_todr.todr_settime = dracousettod; 117 todr_attach(&sc->sc_todr); 118 } 119 120 static int 121 draco_ds_read_bit(void *p) 122 { 123 struct drioct *draco_ioctl; 124 125 draco_ioctl = p; 126 127 while (draco_ioctl->io_status & DRSTAT_CLKBUSY); 128 129 draco_ioctl->io_clockw1 = 0; 130 131 while (draco_ioctl->io_status & DRSTAT_CLKBUSY); 132 133 return (draco_ioctl->io_status & DRSTAT_CLKDAT); 134 } 135 136 static void 137 draco_ds_write_bit(void *p, int b) 138 { 139 struct drioct *draco_ioctl; 140 141 draco_ioctl = p; 142 143 while (draco_ioctl->io_status & DRSTAT_CLKBUSY); 144 145 if (b) 146 draco_ioctl->io_clockw1 = 0; 147 else 148 draco_ioctl->io_clockw0 = 0; 149 } 150 151 static void 152 draco_ds_reset(void *p) 153 { 154 struct drioct *draco_ioctl; 155 156 draco_ioctl = p; 157 158 draco_ioctl->io_clockrst = 0; 159 } 160 161 static int 162 dracougettod(todr_chip_handle_t h, struct timeval *tvp) 163 { 164 struct drbbc_softc *sc = device_private(h->todr_dev); 165 u_int32_t clkbuf; 166 u_int32_t usecs; 167 168 sc->sc_dsh.ds_reset(sc->sc_dsh.ds_hw_handle); 169 170 ds_write_byte(&sc->sc_dsh, DS_ROM_SKIP); 171 172 ds_write_byte(&sc->sc_dsh, DS_MEM_READ_MEMORY); 173 /* address of seconds/256: */ 174 ds_write_byte(&sc->sc_dsh, 0x02); 175 ds_write_byte(&sc->sc_dsh, 0x02); 176 177 usecs = (ds_read_byte(&sc->sc_dsh) * 1000000) / 256; 178 clkbuf = ds_read_byte(&sc->sc_dsh) 179 + (ds_read_byte(&sc->sc_dsh)<<8) 180 + (ds_read_byte(&sc->sc_dsh)<<16) 181 + (ds_read_byte(&sc->sc_dsh)<<24); 182 183 /* BSD time is wrt. 1.1.1970; AmigaOS time wrt. 1.1.1978 */ 184 185 clkbuf += (8*365 + 2) * 86400; 186 187 tvp->tv_sec = clkbuf; 188 tvp->tv_usec = usecs; 189 190 return (0); 191 } 192 193 static int 194 dracousettod(todr_chip_handle_t h, struct timeval *tvp) 195 { 196 return (ENXIO); 197 } 198
Indexes created Sat Sep 20 22:09:52 GMT 2025