ofrtc.c revision 1.7
1 /* $NetBSD: ofrtc.c,v 1.7 1998/03/21 02:05:17 cgd Exp $ */ 2 3 /* 4 * Copyright (C) 1996 Wolfgang Solfrank. 5 * Copyright (C) 1996 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/device.h> 37 38 #include <dev/ofw/openfirm.h> 39 40 struct ofrtc_softc { 41 struct device sc_dev; 42 int sc_phandle; 43 int sc_ihandle; 44 }; 45 46 static int ofrtc_match __P((struct device *, struct cfdata *, void *)); 47 static void ofrtc_attach __P((struct device *, struct device *, void *)); 48 49 struct cfattach ofrtc_ca = { 50 sizeof(struct ofrtc_softc), ofrtc_match, ofrtc_attach 51 }; 52 53 extern struct cfdriver ofrtc_cd; 54 55 static int 56 ofrtc_match(parent, match, aux) 57 struct device *parent; 58 struct cfdata *match; 59 void *aux; 60 { 61 struct ofbus_attach_args *oba = aux; 62 char type[8]; 63 int l; 64 65 if (strcmp(oba->oba_busname, "ofw")) 66 return (0); 67 if ((l = OF_getprop(oba->oba_phandle, "device_type", type, 68 sizeof type - 1)) < 0 || 69 l >= sizeof type) 70 return 0; 71 72 return !strcmp(type, "rtc"); 73 } 74 75 static void 76 ofrtc_attach(parent, self, aux) 77 struct device *parent, *self; 78 void *aux; 79 { 80 struct ofrtc_softc *of = (void *)self; 81 struct ofbus_attach_args *oba = aux; 82 char name[32]; 83 int l; 84 85 of->sc_phandle = oba->oba_phandle; 86 of->sc_ihandle = 0; 87 if ((l = OF_getprop(of->sc_phandle, "name", name, 88 sizeof name - 1)) < 0) 89 panic("Device without name?"); 90 if (l >= sizeof name) 91 l = sizeof name - 1; 92 name[l] = 0; 93 printf(": %s\n", name); 94 } 95 96 int 97 ofrtc_open(dev, flags, fmt) 98 dev_t dev; 99 int flags; 100 int fmt; 101 { 102 struct ofrtc_softc *of; 103 int unit = minor(dev); 104 char path[256]; 105 int l; 106 107 if (unit >= ofrtc_cd.cd_ndevs) 108 return ENXIO; 109 if (!(of = ofrtc_cd.cd_devs[unit])) 110 return ENXIO; 111 if (!of->sc_ihandle) { 112 if ((l = OF_package_to_path(of->sc_phandle, path, 113 sizeof path - 1)) < 0 || 114 l >= sizeof path) 115 return ENXIO; 116 path[l] = 0; 117 118 if (!(of->sc_ihandle = OF_open(path))) { 119 if (of->sc_ihandle) { 120 OF_close(of->sc_ihandle); 121 of->sc_ihandle = 0; 122 } 123 return ENXIO; 124 } 125 126 } 127 128 return 0; 129 } 130 131 int 132 ofrtc_close(dev, flags, fmt) 133 dev_t dev; 134 int flags; 135 int fmt; 136 { 137 return 0; 138 } 139 140 static void 141 twodigit(bp, i) 142 char *bp; 143 int i; 144 { 145 *bp++ = i / 10 + '0'; 146 *bp = i % 10 + '0'; 147 } 148 149 static int 150 twodigits(bp) 151 char *bp; 152 { 153 int i; 154 155 i = *bp++ - '0'; 156 return i * 10 + *bp++ - '0'; 157 } 158 159 int 160 ofrtc_read(dev, uio, flag) 161 dev_t dev; 162 struct uio *uio; 163 int flag; 164 { 165 struct ofrtc_softc *of = ofrtc_cd.cd_devs[minor(dev)]; 166 int date[6]; 167 char buf[14]; 168 int xlen; 169 170 if (uio->uio_offset >= sizeof buf) 171 return 0; 172 173 if (OF_call_method("get-time", of->sc_ihandle, 0, 6, 174 date, date + 1, date + 2, 175 date + 3, date + 4, date + 5)) 176 return EIO; 177 178 twodigit(buf, date[5] % 100); 179 twodigit(buf + 2, date[4]); 180 twodigit(buf + 4, date[3]); 181 twodigit(buf + 6, date[2]); 182 twodigit(buf + 8, date[1]); 183 buf[10] = '.'; 184 twodigit(buf + 11, date[0]); 185 buf[13] = '\n'; 186 187 xlen = sizeof(buf) - uio->uio_offset; 188 if (xlen > uio->uio_resid) 189 xlen = uio->uio_resid; 190 191 return uiomove((caddr_t)buf, xlen, uio); 192 } 193 194 int 195 ofrtc_write(dev, uio, flag) 196 dev_t dev; 197 struct uio *uio; 198 int flag; 199 { 200 struct ofrtc_softc *of = ofrtc_cd.cd_devs[minor(dev)]; 201 char buf[14]; 202 int cnt, year, error; 203 204 /* 205 * We require atomic updates! 206 */ 207 cnt = uio->uio_resid; 208 if (uio->uio_offset || (cnt != sizeof buf && cnt != sizeof buf - 1)) 209 return EINVAL; 210 211 if ((error = uiomove((caddr_t)buf, sizeof buf, uio)) != 0) 212 return error; 213 214 if (cnt == sizeof buf && buf[sizeof buf - 1] != '\n') 215 return EINVAL; 216 217 year = twodigits(buf) + 1900; 218 if (year < 1970) 219 year += 100; 220 if (OF_call_method("set-time", of->sc_ihandle, 6, 0, 221 twodigits(buf + 11), twodigits(buf + 8), twodigits(buf + 6), 222 twodigits(buf + 4), twodigits(buf + 2), year)) 223 return EIO; 224 return 0; 225 } 226
Indexes created Wed Oct 01 13:09:50 GMT 2025