1 /* $NetBSD: uk.c,v 1.29 2000/03/30 00:00:57 augustss 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_link *sc_link; /* 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 struct cfattach uk_scsibus_ca = { 72 sizeof(struct uk_softc), ukmatch, ukattach, ukdetach, ukactivate, 73 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 /* 82 * This driver is so simple it uses all the default services 83 */ 84 struct scsipi_device uk_switch = { 85 NULL, 86 NULL, 87 NULL, 88 NULL, 89 }; 90 91 cdev_decl(uk); 92 93 int 94 ukmatch(parent, match, aux) 95 struct device *parent; 96 struct cfdata *match; 97 void *aux; 98 { 99 100 return (1); 101 } 102 103 /* 104 * The routine called by the low level scsi routine when it discovers 105 * a device suitable for this driver. 106 */ 107 void 108 ukattach(parent, self, aux) 109 struct device *parent, *self; 110 void *aux; 111 { 112 struct uk_softc *uk = (void *)self; 113 struct scsipibus_attach_args *sa = aux; 114 struct scsipi_link *sc_link = sa->sa_sc_link; 115 116 SC_DEBUG(sc_link, SDEV_DB2, ("ukattach: ")); 117 118 /* 119 * Store information needed to contact our base driver 120 */ 121 uk->sc_link = sc_link; 122 sc_link->device = &uk_switch; 123 sc_link->device_softc = uk; 124 sc_link->openings = 1; 125 126 printf("\n"); 127 printf("%s: unknown device\n", uk->sc_dev.dv_xname); 128 } 129 130 int 131 ukactivate(self, act) 132 struct device *self; 133 enum devact act; 134 { 135 int rv = 0; 136 137 switch (act) { 138 case DVACT_ACTIVATE: 139 rv = EOPNOTSUPP; 140 break; 141 142 case DVACT_DEACTIVATE: 143 /* 144 * Nothing to do; we key off the device's DVF_ACTIVE. 145 */ 146 break; 147 } 148 return (rv); 149 } 150 151 int 152 ukdetach(self, flags) 153 struct device *self; 154 int flags; 155 { 156 /*struct uk_softc *uk = (struct uk_softc *) self;*/ 157 int cmaj, mn; 158 159 /* locate the major number */ 160 for (cmaj = 0; cmaj <= nchrdev; cmaj++) 161 if (cdevsw[cmaj].d_open == ukopen) 162 break; 163 164 /* Nuke the vnodes for any open instances */ 165 mn = self->dv_unit; 166 vdevgone(cmaj, mn, mn, VCHR); 167 168 return (0); 169 } 170 171 /* 172 * open the device. 173 */ 174 int 175 ukopen(dev, flag, fmt, p) 176 dev_t dev; 177 int flag, fmt; 178 struct proc *p; 179 { 180 int unit, error; 181 struct uk_softc *uk; 182 struct scsipi_link *sc_link; 183 184 unit = UKUNIT(dev); 185 if (unit >= uk_cd.cd_ndevs) 186 return (ENXIO); 187 uk = uk_cd.cd_devs[unit]; 188 if (uk == NULL) 189 return (ENXIO); 190 191 sc_link = uk->sc_link; 192 193 SC_DEBUG(sc_link, SDEV_DB1, 194 ("ukopen: dev=0x%x (unit %d (of %d))\n", dev, unit, 195 uk_cd.cd_ndevs)); 196 197 /* 198 * Only allow one at a time 199 */ 200 if (sc_link->flags & SDEV_OPEN) { 201 printf("%s: already open\n", uk->sc_dev.dv_xname); 202 return (EBUSY); 203 } 204 205 if ((error = scsipi_adapter_addref(sc_link)) != 0) 206 return (error); 207 sc_link->flags |= SDEV_OPEN; 208 209 SC_DEBUG(sc_link, SDEV_DB3, ("open complete\n")); 210 return (0); 211 } 212 213 /* 214 * close the device.. only called if we are the LAST 215 * occurence of an open device 216 */ 217 int 218 ukclose(dev, flag, fmt, p) 219 dev_t dev; 220 int flag, fmt; 221 struct proc *p; 222 { 223 struct uk_softc *uk = uk_cd.cd_devs[UKUNIT(dev)]; 224 225 SC_DEBUG(uk->sc_link, SDEV_DB1, ("closing\n")); 226 227 scsipi_wait_drain(uk->sc_link); 228 229 scsipi_adapter_delref(uk->sc_link); 230 uk->sc_link->flags &= ~SDEV_OPEN; 231 232 return (0); 233 } 234 235 /* 236 * Perform special action on behalf of the user 237 * Only does generic scsi ioctls. 238 */ 239 int 240 ukioctl(dev, cmd, addr, flag, p) 241 dev_t dev; 242 u_long cmd; 243 caddr_t addr; 244 int flag; 245 struct proc *p; 246 { 247 struct uk_softc *uk = uk_cd.cd_devs[UKUNIT(dev)]; 248 249 return (scsipi_do_ioctl(uk->sc_link, dev, cmd, addr, flag, p)); 250 } 251