1 /* $NetBSD: uk.c,v 1.38 2002/10/23 09:13:52 jdolecek 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 1.38 2002/10/23 09:13:52 jdolecek 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 CFATTACH_DECL(uk_scsibus, sizeof(struct uk_softc), 75 ukmatch, ukattach, ukdetach, ukactivate); 76 77 CFATTACH_DECL(uk_atapibus, sizeof(struct uk_softc), 78 ukmatch, ukattach, ukdetach, ukactivate); 79 80 extern struct cfdriver uk_cd; 81 82 dev_type_open(ukopen); 83 dev_type_close(ukclose); 84 dev_type_ioctl(ukioctl); 85 86 const struct cdevsw uk_cdevsw = { 87 ukopen, ukclose, noread, nowrite, ukioctl, 88 nostop, notty, nopoll, nommap, nokqfilter, 89 }; 90 91 int 92 ukmatch(parent, match, aux) 93 struct device *parent; 94 struct cfdata *match; 95 void *aux; 96 { 97 98 return (1); 99 } 100 101 /* 102 * The routine called by the low level scsi routine when it discovers 103 * a device suitable for this driver. 104 */ 105 void 106 ukattach(parent, self, aux) 107 struct device *parent, *self; 108 void *aux; 109 { 110 struct uk_softc *uk = (void *)self; 111 struct scsipibus_attach_args *sa = aux; 112 struct scsipi_periph *periph = sa->sa_periph; 113 114 SC_DEBUG(periph, SCSIPI_DB2, ("ukattach: ")); 115 116 /* 117 * Store information needed to contact our base driver 118 */ 119 uk->sc_periph = periph; 120 periph->periph_dev = &uk->sc_dev; 121 122 printf("\n"); 123 } 124 125 int 126 ukactivate(self, act) 127 struct device *self; 128 enum devact act; 129 { 130 int rv = 0; 131 132 switch (act) { 133 case DVACT_ACTIVATE: 134 rv = EOPNOTSUPP; 135 break; 136 137 case DVACT_DEACTIVATE: 138 /* 139 * Nothing to do; we key off the device's DVF_ACTIVE. 140 */ 141 break; 142 } 143 return (rv); 144 } 145 146 int 147 ukdetach(self, flags) 148 struct device *self; 149 int flags; 150 { 151 /*struct uk_softc *uk = (struct uk_softc *) self;*/ 152 int cmaj, mn; 153 154 /* locate the major number */ 155 cmaj = cdevsw_lookup_major(&uk_cdevsw); 156 157 /* Nuke the vnodes for any open instances */ 158 mn = self->dv_unit; 159 vdevgone(cmaj, mn, mn, VCHR); 160 161 return (0); 162 } 163 164 165 166 /* 167 * open the device. 168 */ 169 int 170 ukopen(dev, flag, fmt, p) 171 dev_t dev; 172 int flag, fmt; 173 struct proc *p; 174 { 175 int unit, error; 176 struct uk_softc *uk; 177 struct scsipi_periph *periph; 178 struct scsipi_adapter *adapt; 179 180 unit = UKUNIT(dev); 181 if (unit >= uk_cd.cd_ndevs) 182 return (ENXIO); 183 uk = uk_cd.cd_devs[unit]; 184 if (uk == NULL) 185 return (ENXIO); 186 187 periph = uk->sc_periph; 188 adapt = periph->periph_channel->chan_adapter; 189 190 SC_DEBUG(periph, SCSIPI_DB1, 191 ("ukopen: dev=0x%x (unit %d (of %d))\n", dev, unit, 192 uk_cd.cd_ndevs)); 193 194 /* 195 * Only allow one at a time 196 */ 197 if (periph->periph_flags & PERIPH_OPEN) { 198 printf("%s: already open\n", uk->sc_dev.dv_xname); 199 return (EBUSY); 200 } 201 202 if ((error = scsipi_adapter_addref(adapt)) != 0) 203 return (error); 204 periph->periph_flags |= PERIPH_OPEN; 205 206 SC_DEBUG(periph, SCSIPI_DB3, ("open complete\n")); 207 return (0); 208 } 209 210 /* 211 * close the device.. only called if we are the LAST 212 * occurence of an open device 213 */ 214 int 215 ukclose(dev, flag, fmt, p) 216 dev_t dev; 217 int flag, fmt; 218 struct proc *p; 219 { 220 struct uk_softc *uk = uk_cd.cd_devs[UKUNIT(dev)]; 221 struct scsipi_periph *periph = uk->sc_periph; 222 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 223 224 SC_DEBUG(uk->sc_periph, SCSIPI_DB1, ("closing\n")); 225 226 scsipi_wait_drain(periph); 227 228 scsipi_adapter_delref(adapt); 229 periph->periph_flags &= ~PERIPH_OPEN; 230 231 return (0); 232 } 233 234 /* 235 * Perform special action on behalf of the user 236 * Only does generic scsi ioctls. 237 */ 238 int 239 ukioctl(dev, cmd, addr, flag, p) 240 dev_t dev; 241 u_long cmd; 242 caddr_t addr; 243 int flag; 244 struct proc *p; 245 { 246 register struct uk_softc *uk = uk_cd.cd_devs[UKUNIT(dev)]; 247 248 return (scsipi_do_ioctl(uk->sc_periph, dev, cmd, addr, flag, p)); 249 } 250