1 /* $NetBSD: ofrtc.c,v 1.9 2001/08/26 02:49:18 matt 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 #include <sys/conf.h> 38 39 #include <dev/ofw/openfirm.h> 40 41 cdev_decl(ofrtc_); 42 43 struct ofrtc_softc { 44 struct device sc_dev; 45 int sc_phandle; 46 int sc_ihandle; 47 }; 48 49 static int ofrtc_match __P((struct device *, struct cfdata *, void *)); 50 static void ofrtc_attach __P((struct device *, struct device *, void *)); 51 52 struct cfattach ofrtc_ca = { 53 sizeof(struct ofrtc_softc), ofrtc_match, ofrtc_attach 54 }; 55 56 extern struct cfdriver ofrtc_cd; 57 58 static int 59 ofrtc_match(struct device *parent, struct cfdata *match, 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(struct device *parent, struct device *self, void *aux) 77 { 78 struct ofrtc_softc *of = (void *)self; 79 struct ofbus_attach_args *oba = aux; 80 char name[32]; 81 int l; 82 83 of->sc_phandle = oba->oba_phandle; 84 of->sc_ihandle = 0; 85 if ((l = OF_getprop(of->sc_phandle, "name", name, 86 sizeof name - 1)) < 0) 87 panic("Device without name?"); 88 if (l >= sizeof name) 89 l = sizeof name - 1; 90 name[l] = 0; 91 printf(": %s\n", name); 92 } 93 94 int 95 ofrtc_open(dev_t dev, int flags, int fmt, struct proc *p) 96 { 97 struct ofrtc_softc *of; 98 int unit = minor(dev); 99 char path[256]; 100 int l; 101 102 if (unit >= ofrtc_cd.cd_ndevs) 103 return ENXIO; 104 if (!(of = ofrtc_cd.cd_devs[unit])) 105 return ENXIO; 106 if (!of->sc_ihandle) { 107 if ((l = OF_package_to_path(of->sc_phandle, path, 108 sizeof path - 1)) < 0 || 109 l >= sizeof path) 110 return ENXIO; 111 path[l] = 0; 112 113 if (!(of->sc_ihandle = OF_open(path))) { 114 if (of->sc_ihandle) { 115 OF_close(of->sc_ihandle); 116 of->sc_ihandle = 0; 117 } 118 return ENXIO; 119 } 120 121 } 122 123 return 0; 124 } 125 126 int 127 ofrtc_close(dev_t dev, int flags, int fmt, struct proc *p) 128 { 129 return 0; 130 } 131 132 static void 133 twodigit(char *bp, int i) 134 { 135 *bp++ = i / 10 + '0'; 136 *bp = i % 10 + '0'; 137 } 138 139 static int 140 twodigits(char *bp) 141 { 142 int i; 143 144 i = *bp++ - '0'; 145 return i * 10 + *bp++ - '0'; 146 } 147 148 int 149 ofrtc_read(dev_t dev, struct uio *uio, int flag) 150 { 151 struct ofrtc_softc *of = ofrtc_cd.cd_devs[minor(dev)]; 152 int date[6]; 153 char buf[14]; 154 int xlen; 155 156 if (uio->uio_offset >= sizeof buf) 157 return 0; 158 159 if (OF_call_method("get-time", of->sc_ihandle, 0, 6, 160 date, date + 1, date + 2, 161 date + 3, date + 4, date + 5)) 162 return EIO; 163 164 twodigit(buf, date[5] % 100); 165 twodigit(buf + 2, date[4]); 166 twodigit(buf + 4, date[3]); 167 twodigit(buf + 6, date[2]); 168 twodigit(buf + 8, date[1]); 169 buf[10] = '.'; 170 twodigit(buf + 11, date[0]); 171 buf[13] = '\n'; 172 173 xlen = sizeof(buf) - uio->uio_offset; 174 if (xlen > uio->uio_resid) 175 xlen = uio->uio_resid; 176 177 return uiomove((caddr_t)buf, xlen, uio); 178 } 179 180 int 181 ofrtc_write(dev_t dev, struct uio *uio, int flag) 182 { 183 struct ofrtc_softc *of = ofrtc_cd.cd_devs[minor(dev)]; 184 char buf[14]; 185 int cnt, year, error; 186 187 /* 188 * We require atomic updates! 189 */ 190 cnt = uio->uio_resid; 191 if (uio->uio_offset || (cnt != sizeof buf && cnt != sizeof buf - 1)) 192 return EINVAL; 193 194 if ((error = uiomove((caddr_t)buf, sizeof buf, uio)) != 0) 195 return error; 196 197 if (cnt == sizeof buf && buf[sizeof buf - 1] != '\n') 198 return EINVAL; 199 200 year = twodigits(buf) + 1900; 201 if (year < 1970) 202 year += 100; 203 if (OF_call_method("set-time", of->sc_ihandle, 6, 0, 204 twodigits(buf + 11), twodigits(buf + 8), twodigits(buf + 6), 205 twodigits(buf + 4), twodigits(buf + 2), year)) 206 return EIO; 207 return 0; 208 } 209