/* $NetBSD: ss.c,v 1.26 1999/09/30 22:57:54 thorpej Exp $ */ /* * Copyright (c) 1995 Kenneth Stailey. All rights reserved. * modified for configurable scanner support by Joachim Koenig * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Kenneth Stailey. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define SSMODE(z) ( minor(z) & 0x03) #define SSUNIT(z) ((minor(z) >> 4) ) /* * If the mode is 3 (e.g. minor = 3,7,11,15) * then the device has been openned to set defaults * This mode does NOT ALLOW I/O, only ioctls */ #define MODE_REWIND 0 #define MODE_NONREWIND 1 #define MODE_CONTROL 3 int ssmatch __P((struct device *, struct cfdata *, void *)); void ssattach __P((struct device *, struct device *, void *)); struct cfattach ss_ca = { sizeof(struct ss_softc), ssmatch, ssattach }; extern struct cfdriver ss_cd; void ssstrategy __P((struct buf *)); void ssstart __P((void *)); void ssminphys __P((struct buf *)); struct scsipi_device ss_switch = { NULL, ssstart, NULL, NULL, }; struct scsipi_inquiry_pattern ss_patterns[] = { {T_SCANNER, T_FIXED, "", "", ""}, {T_SCANNER, T_REMOV, "", "", ""}, {T_PROCESSOR, T_FIXED, "HP ", "C1750A ", ""}, {T_PROCESSOR, T_FIXED, "HP ", "C2500A ", ""}, {T_PROCESSOR, T_FIXED, "HP ", "C1130A ", ""}, {T_PROCESSOR, T_FIXED, "HP ", "C5110A ", ""}, }; int ssmatch(parent, match, aux) struct device *parent; struct cfdata *match; void *aux; { struct scsipibus_attach_args *sa = aux; int priority; (void)scsipi_inqmatch(&sa->sa_inqbuf, (caddr_t)ss_patterns, sizeof(ss_patterns) / sizeof(ss_patterns[0]), sizeof(ss_patterns[0]), &priority); return (priority); } /* * The routine called by the low level scsi routine when it discovers * A device suitable for this driver * If it is a know special, call special attach routine to install * special handlers into the ss_softc structure */ void ssattach(parent, self, aux) struct device *parent, *self; void *aux; { struct ss_softc *ss = (void *)self; struct scsipibus_attach_args *sa = aux; struct scsipi_link *sc_link = sa->sa_sc_link; SC_DEBUG(sc_link, SDEV_DB2, ("ssattach: ")); ss->flags |= SSF_AUTOCONF; /* * Store information needed to contact our base driver */ ss->sc_link = sc_link; sc_link->device = &ss_switch; sc_link->device_softc = ss; sc_link->openings = 1; /* * look for non-standard scanners with help of the quirk table * and install functions for special handling */ SC_DEBUG(sc_link, SDEV_DB2, ("ssattach:\n")); if (!bcmp(sa->sa_inqbuf.vendor, "MUSTEK", 6)) mustek_attach(ss, sa); if (!bcmp(sa->sa_inqbuf.vendor, "HP ", 8)) scanjet_attach(ss, sa); if (ss->special == NULL) { /* XXX add code to restart a SCSI2 scanner, if any */ } /* * Set up the buf queue for this device */ ss->buf_queue.b_active = 0; ss->buf_queue.b_actf = 0; ss->buf_queue.b_actb = &ss->buf_queue.b_actf; ss->flags &= ~SSF_AUTOCONF; } /* * open the device. */ int ssopen(dev, flag, mode, p) dev_t dev; int flag; int mode; struct proc *p; { int unit; u_int ssmode; int error; struct ss_softc *ss; struct scsipi_link *sc_link; unit = SSUNIT(dev); if (unit >= ss_cd.cd_ndevs) return (ENXIO); ss = ss_cd.cd_devs[unit]; if (!ss) return (ENXIO); ssmode = SSMODE(dev); sc_link = ss->sc_link; SC_DEBUG(sc_link, SDEV_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, unit, ss_cd.cd_ndevs)); if (sc_link->flags & SDEV_OPEN) { printf("%s: already open\n", ss->sc_dev.dv_xname); return (EBUSY); } if ((error = scsipi_adapter_addref(sc_link)) != 0) return (error); /* * Catch any unit attention errors. * * XS_CTL_IGNORE_MEDIA_CHANGE: when you have an ADF, some scanners * consider paper to be a changeable media * */ error = scsipi_test_unit_ready(sc_link, XS_CTL_IGNORE_MEDIA_CHANGE | XS_CTL_IGNORE_ILLEGAL_REQUEST | (ssmode == MODE_CONTROL ? XS_CTL_IGNORE_NOT_READY : 0)); if (error) goto bad; sc_link->flags |= SDEV_OPEN; /* unit attn are now errors */ /* * If the mode is 3 (e.g. minor = 3,7,11,15) * then the device has been opened to set defaults * This mode does NOT ALLOW I/O, only ioctls */ if (ssmode == MODE_CONTROL) return (0); SC_DEBUG(sc_link, SDEV_DB2, ("open complete\n")); return (0); bad: scsipi_adapter_delref(sc_link); sc_link->flags &= ~SDEV_OPEN; return (error); } /* * close the device.. only called if we are the LAST * occurence of an open device */ int ssclose(dev, flag, mode, p) dev_t dev; int flag; int mode; struct proc *p; { struct ss_softc *ss = ss_cd.cd_devs[SSUNIT(dev)]; int error; SC_DEBUG(ss->sc_link, SDEV_DB1, ("closing\n")); if (SSMODE(dev) == MODE_REWIND) { if (ss->special && ss->special->rewind_scanner) { /* call special handler to rewind/abort scan */ error = (ss->special->rewind_scanner)(ss); if (error) return (error); } else { /* XXX add code to restart a SCSI2 scanner, if any */ } ss->sio.scan_window_size = 0; ss->flags &= ~SSF_TRIGGERED; } scsipi_wait_drain(ss->sc_link); scsipi_adapter_delref(ss->sc_link); ss->sc_link->flags &= ~SDEV_OPEN; return (0); } /* * trim the size of the transfer if needed, * called by physio * basically the smaller of our min and the scsi driver's * minphys */ void ssminphys(bp) struct buf *bp; { register struct ss_softc *ss = ss_cd.cd_devs[SSUNIT(bp->b_dev)]; (ss->sc_link->adapter->scsipi_minphys)(bp); /* * trim the transfer further for special devices this is * because some scanners only read multiples of a line at a * time, also some cannot disconnect, so the read must be * short enough to happen quickly */ if (ss->special && ss->special->minphys) (ss->special->minphys)(ss, bp); } /* * Do a read on a device for a user process. * Prime scanner at start of read, check uio values, call ssstrategy * via physio for the actual transfer. */ int ssread(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { struct ss_softc *ss = ss_cd.cd_devs[SSUNIT(dev)]; int error; /* if the scanner has not yet been started, do it now */ if (!(ss->flags & SSF_TRIGGERED)) { if (ss->special && ss->special->trigger_scanner) { error = (ss->special->trigger_scanner)(ss); if (error) return (error); } ss->flags |= SSF_TRIGGERED; } return (physio(ssstrategy, NULL, dev, B_READ, ssminphys, uio)); } /* * Actually translate the requested transfer into one the physical * driver can understand The transfer is described by a buf and will * include only one physical transfer. */ void ssstrategy(bp) struct buf *bp; { struct ss_softc *ss = ss_cd.cd_devs[SSUNIT(bp->b_dev)]; struct buf *dp; int s; SC_DEBUG(ss->sc_link, SDEV_DB1, ("ssstrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); /* If negative offset, error */ if (bp->b_blkno < 0) { bp->b_flags |= B_ERROR; bp->b_error = EINVAL; goto done; } if (bp->b_bcount > ss->sio.scan_window_size) bp->b_bcount = ss->sio.scan_window_size; /* * If it's a null transfer, return immediatly */ if (bp->b_bcount == 0) goto done; s = splbio(); /* * Place it in the queue of activities for this scanner * at the end (a bit silly because we only have on user.. * (but it could fork())) */ dp = &ss->buf_queue; bp->b_actf = NULL; bp->b_actb = dp->b_actb; *dp->b_actb = bp; dp->b_actb = &bp->b_actf; /* * Tell the device to get going on the transfer if it's * not doing anything, otherwise just wait for completion * (All a bit silly if we're only allowing 1 open but..) */ ssstart(ss); splx(s); return; bp->b_flags |= B_ERROR; done: /* * Correctly set the buf to indicate a completed xfer */ bp->b_resid = bp->b_bcount; biodone(bp); } /* * ssstart looks to see if there is a buf waiting for the device * and that the device is not already busy. If both are true, * It dequeues the buf and creates a scsi command to perform the * transfer required. The transfer request will call scsipi_done * on completion, which will in turn call this routine again * so that the next queued transfer is performed. * The bufs are queued by the strategy routine (ssstrategy) * * This routine is also called after other non-queued requests * have been made of the scsi driver, to ensure that the queue * continues to be drained. * ssstart() is called at splbio */ void ssstart(v) void *v; { struct ss_softc *ss = v; struct scsipi_link *sc_link = ss->sc_link; register struct buf *bp, *dp; SC_DEBUG(sc_link, SDEV_DB2, ("ssstart ")); /* * See if there is a buf to do and we are not already * doing one */ while (sc_link->active < sc_link->openings) { /* if a special awaits, let it proceed first */ if (sc_link->flags & SDEV_WAITING) { sc_link->flags &= ~SDEV_WAITING; wakeup((caddr_t)sc_link); return; } /* * See if there is a buf with work for us to do.. */ dp = &ss->buf_queue; if ((bp = dp->b_actf) == NULL) return; if ((dp = bp->b_actf) != NULL) dp->b_actb = bp->b_actb; else ss->buf_queue.b_actb = bp->b_actb; *bp->b_actb = dp; if (ss->special && ss->special->read) { (ss->special->read)(ss, bp); } else { /* generic scsi2 scanner read */ /* XXX add code for SCSI2 scanner read */ } } } /* * Perform special action on behalf of the user; * knows about the internals of this device */ int ssioctl(dev, cmd, addr, flag, p) dev_t dev; u_long cmd; caddr_t addr; int flag; struct proc *p; { struct ss_softc *ss = ss_cd.cd_devs[SSUNIT(dev)]; int error = 0; struct scan_io *sio; switch (cmd) { case SCIOCGET: if (ss->special && ss->special->get_params) { /* call special handler */ error = (ss->special->get_params)(ss); if (error) return (error); } else { /* XXX add code for SCSI2 scanner, if any */ return (EOPNOTSUPP); } bcopy(&ss->sio, addr, sizeof(struct scan_io)); break; case SCIOCSET: sio = (struct scan_io *)addr; if (ss->special && ss->special->set_params) { /* call special handler */ error = (ss->special->set_params)(ss, sio); if (error) return (error); } else { /* XXX add code for SCSI2 scanner, if any */ return (EOPNOTSUPP); } break; case SCIOCRESTART: if (ss->special && ss->special->rewind_scanner ) { /* call special handler */ error = (ss->special->rewind_scanner)(ss); if (error) return (error); } else /* XXX add code for SCSI2 scanner, if any */ return (EOPNOTSUPP); ss->flags &= ~SSF_TRIGGERED; break; #ifdef NOTYET case SCAN_USE_ADF: break; #endif default: if (SSMODE(dev) != MODE_CONTROL) return (ENOTTY); return (scsipi_do_ioctl(ss->sc_link, dev, cmd, addr, flag, p)); } return (error); }