1 /* $NetBSD: uk.c,v 1.30 2001/04/25 17:53:42 bouyer Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Dummy driver for a device we can't identify. 41 * Originally by Julian Elischer (julian@tfs.com) 42 */ 43 44 #include <sys/types.h> 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 48 #include <sys/errno.h> 49 #include <sys/ioctl.h> 50 #include <sys/device.h> 51 #include <sys/conf.h> 52 #include <sys/vnode.h> 53 54 #include <dev/scsipi/scsi_all.h> 55 #include <dev/scsipi/scsipi_all.h> 56 #include <dev/scsipi/scsiconf.h> 57 58 #define UKUNIT(z) (minor(z)) 59 60 struct uk_softc { 61 struct device sc_dev; 62 63 struct scsipi_periph *sc_periph; /* all the inter level info */ 64 }; 65 66 int ukmatch __P((struct device *, struct cfdata *, void *)); 67 void ukattach __P((struct device *, struct device *, void *)); 68 int ukactivate __P((struct device *, enum devact)); 69 int ukdetach __P((struct device *, int)); 70 71 72 struct cfattach uk_scsibus_ca = { 73 sizeof(struct uk_softc), ukmatch, ukattach, ukdetach, ukactivate, 74 }; 75 struct cfattach uk_atapibus_ca = { 76 sizeof(struct uk_softc), ukmatch, ukattach, ukdetach, ukactivate, 77 }; 78 79 extern struct cfdriver uk_cd; 80 81 cdev_decl(uk); 82 83 int 84 ukmatch(parent, match, aux) 85 struct device *parent; 86 struct cfdata *match; 87 void *aux; 88 { 89 90 return (1); 91 } 92 93 /* 94 * The routine called by the low level scsi routine when it discovers 95 * a device suitable for this driver. 96 */ 97 void 98 ukattach(parent, self, aux) 99 struct device *parent, *self; 100 void *aux; 101 { 102 struct uk_softc *uk = (void *)self; 103 struct scsipibus_attach_args *sa = aux; 104 struct scsipi_periph *periph = sa->sa_periph; 105 106 SC_DEBUG(periph, SCSIPI_DB2, ("ukattach: ")); 107 108 /* 109 * Store information needed to contact our base driver 110 */ 111 uk->sc_periph = periph; 112 periph->periph_dev = &uk->sc_dev; 113 114 printf("\n"); 115 printf("%s: unknown device\n", uk->sc_dev.dv_xname); 116 } 117 118 int 119 ukactivate(self, act) 120 struct device *self; 121 enum devact act; 122 { 123 int rv = 0; 124 125 switch (act) { 126 case DVACT_ACTIVATE: 127 rv = EOPNOTSUPP; 128 break; 129 130 case DVACT_DEACTIVATE: 131 /* 132 * Nothing to do; we key off the device's DVF_ACTIVE. 133 */ 134 break; 135 } 136 return (rv); 137 } 138 139 int 140 ukdetach(self, flags) 141 struct device *self; 142 int flags; 143 { 144 /*struct uk_softc *uk = (struct uk_softc *) self;*/ 145 int cmaj, mn; 146 147 /* locate the major number */ 148 for (cmaj = 0; cmaj <= nchrdev; cmaj++) 149 if (cdevsw[cmaj].d_open == ukopen) 150 break; 151 152 /* Nuke the vnodes for any open instances */ 153 mn = self->dv_unit; 154 vdevgone(cmaj, mn, mn, VCHR); 155 156 return (0); 157 } 158 159 160 161 /* 162 * open the device. 163 */ 164 int 165 ukopen(dev, flag, fmt, p) 166 dev_t dev; 167 int flag, fmt; 168 struct proc *p; 169 { 170 int unit, error; 171 struct uk_softc *uk; 172 struct scsipi_periph *periph; 173 struct scsipi_adapter *adapt; 174 175 unit = UKUNIT(dev); 176 if (unit >= uk_cd.cd_ndevs) 177 return (ENXIO); 178 uk = uk_cd.cd_devs[unit]; 179 if (uk == NULL) 180 return (ENXIO); 181 182 periph = uk->sc_periph; 183 adapt = periph->periph_channel->chan_adapter; 184 185 SC_DEBUG(periph, SCSIPI_DB1, 186 ("ukopen: dev=0x%x (unit %d (of %d))\n", dev, unit, 187 uk_cd.cd_ndevs)); 188 189 /* 190 * Only allow one at a time 191 */ 192 if (periph->periph_flags & PERIPH_OPEN) { 193 printf("%s: already open\n", uk->sc_dev.dv_xname); 194 return (EBUSY); 195 } 196 197 if ((error = scsipi_adapter_addref(adapt)) != 0) 198 return (error); 199 periph->periph_flags |= PERIPH_OPEN; 200 201 SC_DEBUG(periph, SCSIPI_DB3, ("open complete\n")); 202 return (0); 203 } 204 205 /* 206 * close the device.. only called if we are the LAST 207 * occurence of an open device 208 */ 209 int 210 ukclose(dev, flag, fmt, p) 211 dev_t dev; 212 int flag, fmt; 213 struct proc *p; 214 { 215 struct uk_softc *uk = uk_cd.cd_devs[UKUNIT(dev)]; 216 struct scsipi_periph *periph = uk->sc_periph; 217 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 218 219 SC_DEBUG(uk->sc_periph, SCSIPI_DB1, ("closing\n")); 220 221 scsipi_wait_drain(periph); 222 223 scsipi_adapter_delref(adapt); 224 periph->periph_flags &= ~PERIPH_OPEN; 225 226 return (0); 227 } 228 229 /* 230 * Perform special action on behalf of the user 231 * Only does generic scsi ioctls. 232 */ 233 int 234 ukioctl(dev, cmd, addr, flag, p) 235 dev_t dev; 236 u_long cmd; 237 caddr_t addr; 238 int flag; 239 struct proc *p; 240 { 241 register struct uk_softc *uk = uk_cd.cd_devs[UKUNIT(dev)]; 242 243 return (scsipi_do_ioctl(uk->sc_periph, dev, cmd, addr, flag, p)); 244 } 245