1 /* $NetBSD: uk.c,v 1.33 2002/02/10 23:28:27 thorpej 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/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: uk.c,v 1.33 2002/02/10 23:28:27 thorpej Exp $"); 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 50 #include <sys/errno.h> 51 #include <sys/ioctl.h> 52 #include <sys/device.h> 53 #include <sys/conf.h> 54 #include <sys/vnode.h> 55 56 #include <dev/scsipi/scsi_all.h> 57 #include <dev/scsipi/scsipi_all.h> 58 #include <dev/scsipi/scsiconf.h> 59 60 #define UKUNIT(z) (minor(z)) 61 62 struct uk_softc { 63 struct device sc_dev; 64 65 struct scsipi_periph *sc_periph; /* all the inter level info */ 66 }; 67 68 int ukmatch __P((struct device *, struct cfdata *, void *)); 69 void ukattach __P((struct device *, struct device *, void *)); 70 int ukactivate __P((struct device *, enum devact)); 71 int ukdetach __P((struct device *, int)); 72 73 74 struct cfattach uk_scsibus_ca = { 75 sizeof(struct uk_softc), ukmatch, ukattach, ukdetach, ukactivate, 76 }; 77 struct cfattach uk_atapibus_ca = { 78 sizeof(struct uk_softc), ukmatch, ukattach, ukdetach, ukactivate, 79 }; 80 81 extern struct cfdriver uk_cd; 82 83 cdev_decl(uk); 84 85 int 86 ukmatch(parent, match, aux) 87 struct device *parent; 88 struct cfdata *match; 89 void *aux; 90 { 91 92 return (1); 93 } 94 95 /* 96 * The routine called by the low level scsi routine when it discovers 97 * a device suitable for this driver. 98 */ 99 void 100 ukattach(parent, self, aux) 101 struct device *parent, *self; 102 void *aux; 103 { 104 struct uk_softc *uk = (void *)self; 105 struct scsipibus_attach_args *sa = aux; 106 struct scsipi_periph *periph = sa->sa_periph; 107 108 SC_DEBUG(periph, SCSIPI_DB2, ("ukattach: ")); 109 110 /* 111 * Store information needed to contact our base driver 112 */ 113 uk->sc_periph = periph; 114 periph->periph_dev = &uk->sc_dev; 115 116 printf("\n"); 117 } 118 119 int 120 ukactivate(self, act) 121 struct device *self; 122 enum devact act; 123 { 124 int rv = 0; 125 126 switch (act) { 127 case DVACT_ACTIVATE: 128 rv = EOPNOTSUPP; 129 break; 130 131 case DVACT_DEACTIVATE: 132 /* 133 * Nothing to do; we key off the device's DVF_ACTIVE. 134 */ 135 break; 136 } 137 return (rv); 138 } 139 140 int 141 ukdetach(self, flags) 142 struct device *self; 143 int flags; 144 { 145 /*struct uk_softc *uk = (struct uk_softc *) self;*/ 146 int cmaj, mn; 147 148 /* locate the major number */ 149 for (cmaj = 0; cmaj <= nchrdev; cmaj++) 150 if (cdevsw[cmaj].d_open == ukopen) 151 break; 152 153 /* Nuke the vnodes for any open instances */ 154 mn = self->dv_unit; 155 vdevgone(cmaj, mn, mn, VCHR); 156 157 return (0); 158 } 159 160 161 162 /* 163 * open the device. 164 */ 165 int 166 ukopen(dev, flag, fmt, p) 167 dev_t dev; 168 int flag, fmt; 169 struct proc *p; 170 { 171 int unit, error; 172 struct uk_softc *uk; 173 struct scsipi_periph *periph; 174 struct scsipi_adapter *adapt; 175 176 unit = UKUNIT(dev); 177 if (unit >= uk_cd.cd_ndevs) 178 return (ENXIO); 179 uk = uk_cd.cd_devs[unit]; 180 if (uk == NULL) 181 return (ENXIO); 182 183 periph = uk->sc_periph; 184 adapt = periph->periph_channel->chan_adapter; 185 186 SC_DEBUG(periph, SCSIPI_DB1, 187 ("ukopen: dev=0x%x (unit %d (of %d))\n", dev, unit, 188 uk_cd.cd_ndevs)); 189 190 /* 191 * Only allow one at a time 192 */ 193 if (periph->periph_flags & PERIPH_OPEN) { 194 printf("%s: already open\n", uk->sc_dev.dv_xname); 195 return (EBUSY); 196 } 197 198 if ((error = scsipi_adapter_addref(adapt)) != 0) 199 return (error); 200 periph->periph_flags |= PERIPH_OPEN; 201 202 SC_DEBUG(periph, SCSIPI_DB3, ("open complete\n")); 203 return (0); 204 } 205 206 /* 207 * close the device.. only called if we are the LAST 208 * occurence of an open device 209 */ 210 int 211 ukclose(dev, flag, fmt, p) 212 dev_t dev; 213 int flag, fmt; 214 struct proc *p; 215 { 216 struct uk_softc *uk = uk_cd.cd_devs[UKUNIT(dev)]; 217 struct scsipi_periph *periph = uk->sc_periph; 218 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 219 220 SC_DEBUG(uk->sc_periph, SCSIPI_DB1, ("closing\n")); 221 222 scsipi_wait_drain(periph); 223 224 scsipi_adapter_delref(adapt); 225 periph->periph_flags &= ~PERIPH_OPEN; 226 227 return (0); 228 } 229 230 /* 231 * Perform special action on behalf of the user 232 * Only does generic scsi ioctls. 233 */ 234 int 235 ukioctl(dev, cmd, addr, flag, p) 236 dev_t dev; 237 u_long cmd; 238 caddr_t addr; 239 int flag; 240 struct proc *p; 241 { 242 register struct uk_softc *uk = uk_cd.cd_devs[UKUNIT(dev)]; 243 244 return (scsipi_do_ioctl(uk->sc_periph, dev, cmd, addr, flag, p)); 245 } 246