d7d845c3d2
- Indent with tab of width 8. - Use four column to indent continuation line. - Fold long line if possible. - Use return (xx) instead of return xx. - Compare pointer against NULL instead of testing like boolean. - Delete whitespace at the end of line. - Delete whitespace in front of function call operator. - Delete whitespace after cast. - Dereference a pointer to function explicitly. - Add an empty line after local variable declaration. - Use NULL instead of (char *)0. - Dont use block for single statement.
496 lines
12 KiB
C
496 lines
12 KiB
C
/* $NetBSD: ss.c,v 1.17 1997/10/01 01:19:18 enami Exp $ */
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/*
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* Copyright (c) 1995 Kenneth Stailey. All rights reserved.
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* modified for configurable scanner support by Joachim Koenig
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Kenneth Stailey.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/fcntl.h>
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#include <sys/errno.h>
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#include <sys/ioctl.h>
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#include <sys/malloc.h>
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#include <sys/buf.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/device.h>
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#include <sys/conf.h>
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#include <sys/scanio.h>
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#include <dev/scsipi/scsi_all.h>
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#include <dev/scsipi/scsipi_all.h>
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#include <dev/scsipi/scsi_scanner.h>
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#include <dev/scsipi/scsiconf.h>
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#include <dev/scsipi/ssvar.h>
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#include <dev/scsipi/ss_mustek.h>
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#define SSMODE(z) ( minor(z) & 0x03)
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#define SSUNIT(z) ((minor(z) >> 4) )
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/*
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* If the mode is 3 (e.g. minor = 3,7,11,15)
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* then the device has been openned to set defaults
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* This mode does NOT ALLOW I/O, only ioctls
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*/
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#define MODE_REWIND 0
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#define MODE_NONREWIND 1
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#define MODE_CONTROL 3
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#ifdef __BROKEN_INDIRECT_CONFIG
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int ssmatch __P((struct device *, void *, void *));
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#else
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int ssmatch __P((struct device *, struct cfdata *, void *));
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#endif
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void ssattach __P((struct device *, struct device *, void *));
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struct cfattach ss_ca = {
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sizeof(struct ss_softc), ssmatch, ssattach
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};
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struct cfdriver ss_cd = {
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NULL, "ss", DV_DULL
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};
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void ssstrategy __P((struct buf *));
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void ssstart __P((void *));
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void ssminphys __P((struct buf *));
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struct scsipi_device ss_switch = {
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NULL,
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ssstart,
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NULL,
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NULL,
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};
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struct scsipi_inquiry_pattern ss_patterns[] = {
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{T_SCANNER, T_FIXED,
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"", "", ""},
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{T_SCANNER, T_REMOV,
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"", "", ""},
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{T_PROCESSOR, T_FIXED,
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"HP ", "C1750A ", ""},
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{T_PROCESSOR, T_FIXED,
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"HP ", "C2500A ", ""},
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{T_PROCESSOR, T_FIXED,
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"HP ", "C1130A ", ""},
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};
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int
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ssmatch(parent, match, aux)
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struct device *parent;
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#ifdef __BROKEN_INDIRECT_CONFIG
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void *match;
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#else
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struct cfdata *match;
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#endif
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void *aux;
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{
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struct scsipibus_attach_args *sa = aux;
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int priority;
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(void)scsipi_inqmatch(&sa->sa_inqbuf,
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(caddr_t)ss_patterns, sizeof(ss_patterns) / sizeof(ss_patterns[0]),
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sizeof(ss_patterns[0]), &priority);
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return (priority);
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}
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/*
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* The routine called by the low level scsi routine when it discovers
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* A device suitable for this driver
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* If it is a know special, call special attach routine to install
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* special handlers into the ss_softc structure
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*/
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void
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ssattach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct ss_softc *ss = (void *)self;
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struct scsipibus_attach_args *sa = aux;
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struct scsipi_link *sc_link = sa->sa_sc_link;
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SC_DEBUG(sc_link, SDEV_DB2, ("ssattach: "));
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/*
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* Store information needed to contact our base driver
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*/
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ss->sc_link = sc_link;
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sc_link->device = &ss_switch;
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sc_link->device_softc = ss;
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sc_link->openings = 1;
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/*
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* look for non-standard scanners with help of the quirk table
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* and install functions for special handling
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*/
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SC_DEBUG(sc_link, SDEV_DB2, ("ssattach:\n"));
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if (!bcmp(sa->sa_inqbuf.vendor, "MUSTEK", 6))
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mustek_attach(ss, sa);
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if (!bcmp(sa->sa_inqbuf.vendor, "HP ", 8))
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scanjet_attach(ss, sa);
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if (ss->special == NULL) {
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/* XXX add code to restart a SCSI2 scanner, if any */
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}
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/*
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* Set up the buf queue for this device
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*/
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ss->buf_queue.b_active = 0;
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ss->buf_queue.b_actf = 0;
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ss->buf_queue.b_actb = &ss->buf_queue.b_actf;
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}
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/*
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* open the device.
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*/
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int
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ssopen(dev, flag, mode, p)
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dev_t dev;
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int flag;
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int mode;
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struct proc *p;
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{
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int unit;
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u_int ssmode;
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int error = 0;
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struct ss_softc *ss;
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struct scsipi_link *sc_link;
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unit = SSUNIT(dev);
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if (unit >= ss_cd.cd_ndevs)
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return (ENXIO);
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ss = ss_cd.cd_devs[unit];
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if (!ss)
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return (ENXIO);
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ssmode = SSMODE(dev);
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sc_link = ss->sc_link;
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SC_DEBUG(sc_link, SDEV_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev,
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unit, ss_cd.cd_ndevs));
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if (sc_link->flags & SDEV_OPEN) {
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printf("%s: already open\n", ss->sc_dev.dv_xname);
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return (EBUSY);
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}
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/*
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* Catch any unit attention errors.
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*
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* SCSI_IGNORE_MEDIA_CHANGE: when you have an ADF, some scanners
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* consider paper to be a changeable media
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*
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*/
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error = scsipi_test_unit_ready(sc_link,
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SCSI_IGNORE_MEDIA_CHANGE | SCSI_IGNORE_ILLEGAL_REQUEST |
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(ssmode == MODE_CONTROL ? SCSI_IGNORE_NOT_READY : 0));
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if (error)
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goto bad;
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sc_link->flags |= SDEV_OPEN; /* unit attn are now errors */
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/*
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* If the mode is 3 (e.g. minor = 3,7,11,15)
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* then the device has been opened to set defaults
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* This mode does NOT ALLOW I/O, only ioctls
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*/
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if (ssmode == MODE_CONTROL)
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return (0);
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SC_DEBUG(sc_link, SDEV_DB2, ("open complete\n"));
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return (0);
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bad:
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sc_link->flags &= ~SDEV_OPEN;
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return (error);
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}
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/*
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* close the device.. only called if we are the LAST
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* occurence of an open device
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*/
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int
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ssclose(dev, flag, mode, p)
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dev_t dev;
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int flag;
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int mode;
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struct proc *p;
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{
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struct ss_softc *ss = ss_cd.cd_devs[SSUNIT(dev)];
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int error;
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SC_DEBUG(ss->sc_link, SDEV_DB1, ("closing\n"));
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if (SSMODE(dev) == MODE_REWIND) {
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if (ss->special->rewind_scanner) {
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/* call special handler to rewind/abort scan */
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error = (ss->special->rewind_scanner)(ss);
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if (error)
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return (error);
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} else {
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/* XXX add code to restart a SCSI2 scanner, if any */
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}
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ss->sio.scan_window_size = 0;
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ss->flags &= ~SSF_TRIGGERED;
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}
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ss->sc_link->flags &= ~SDEV_OPEN;
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return (0);
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}
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/*
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* trim the size of the transfer if needed,
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* called by physio
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* basically the smaller of our min and the scsi driver's
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* minphys
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*/
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void
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ssminphys(bp)
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struct buf *bp;
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{
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register struct ss_softc *ss = ss_cd.cd_devs[SSUNIT(bp->b_dev)];
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(ss->sc_link->adapter->scsipi_minphys)(bp);
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/*
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* trim the transfer further for special devices this is
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* because some scanners only read multiples of a line at a
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* time, also some cannot disconnect, so the read must be
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* short enough to happen quickly
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*/
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if (ss->special->minphys)
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(ss->special->minphys)(ss, bp);
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}
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/*
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* Do a read on a device for a user process.
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* Prime scanner at start of read, check uio values, call ssstrategy
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* via physio for the actual transfer.
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*/
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int
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ssread(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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int flag;
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{
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struct ss_softc *ss = ss_cd.cd_devs[SSUNIT(dev)];
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int error;
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/* if the scanner has not yet been started, do it now */
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if (!(ss->flags & SSF_TRIGGERED)) {
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if (ss->special->trigger_scanner) {
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error = (ss->special->trigger_scanner)(ss);
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if (error)
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return (error);
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}
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ss->flags |= SSF_TRIGGERED;
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}
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return (physio(ssstrategy, NULL, dev, B_READ, ssminphys, uio));
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}
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/*
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* Actually translate the requested transfer into one the physical
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* driver can understand The transfer is described by a buf and will
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* include only one physical transfer.
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*/
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void
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ssstrategy(bp)
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struct buf *bp;
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{
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struct ss_softc *ss = ss_cd.cd_devs[SSUNIT(bp->b_dev)];
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struct buf *dp;
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int s;
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SC_DEBUG(ss->sc_link, SDEV_DB1,
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("ssstrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno));
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if (bp->b_bcount > ss->sio.scan_window_size)
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bp->b_bcount = ss->sio.scan_window_size;
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/*
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* If it's a null transfer, return immediatly
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*/
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if (bp->b_bcount == 0)
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goto done;
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s = splbio();
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/*
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* Place it in the queue of activities for this scanner
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* at the end (a bit silly because we only have on user..
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* (but it could fork()))
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*/
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dp = &ss->buf_queue;
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bp->b_actf = NULL;
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bp->b_actb = dp->b_actb;
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*dp->b_actb = bp;
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dp->b_actb = &bp->b_actf;
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/*
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* Tell the device to get going on the transfer if it's
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* not doing anything, otherwise just wait for completion
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* (All a bit silly if we're only allowing 1 open but..)
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*/
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ssstart(ss);
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splx(s);
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return;
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bp->b_flags |= B_ERROR;
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done:
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/*
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* Correctly set the buf to indicate a completed xfer
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*/
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bp->b_resid = bp->b_bcount;
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biodone(bp);
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}
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/*
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* ssstart looks to see if there is a buf waiting for the device
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* and that the device is not already busy. If both are true,
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* It dequeues the buf and creates a scsi command to perform the
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* transfer required. The transfer request will call scsipi_done
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* on completion, which will in turn call this routine again
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* so that the next queued transfer is performed.
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* The bufs are queued by the strategy routine (ssstrategy)
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*
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* This routine is also called after other non-queued requests
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* have been made of the scsi driver, to ensure that the queue
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* continues to be drained.
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* ssstart() is called at splbio
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*/
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void
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ssstart(v)
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void *v;
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{
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struct ss_softc *ss = v;
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struct scsipi_link *sc_link = ss->sc_link;
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register struct buf *bp, *dp;
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SC_DEBUG(sc_link, SDEV_DB2, ("ssstart "));
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/*
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* See if there is a buf to do and we are not already
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* doing one
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*/
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while (sc_link->openings > 0) {
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/* if a special awaits, let it proceed first */
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if (sc_link->flags & SDEV_WAITING) {
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sc_link->flags &= ~SDEV_WAITING;
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wakeup((caddr_t)sc_link);
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return;
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}
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/*
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* See if there is a buf with work for us to do..
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*/
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dp = &ss->buf_queue;
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if ((bp = dp->b_actf) == NULL)
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return;
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if ((dp = bp->b_actf) != NULL)
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dp->b_actb = bp->b_actb;
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else
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ss->buf_queue.b_actb = bp->b_actb;
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*bp->b_actb = dp;
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if (ss->special->read) {
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(ss->special->read)(ss, bp);
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} else {
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/* generic scsi2 scanner read */
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/* XXX add code for SCSI2 scanner read */
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}
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}
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}
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/*
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* Perform special action on behalf of the user;
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* knows about the internals of this device
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*/
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int
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ssioctl(dev, cmd, addr, flag, p)
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dev_t dev;
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u_long cmd;
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caddr_t addr;
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int flag;
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struct proc *p;
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{
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struct ss_softc *ss = ss_cd.cd_devs[SSUNIT(dev)];
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int error = 0;
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struct scan_io *sio;
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switch (cmd) {
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case SCIOCGET:
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if (ss->special->get_params) {
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/* call special handler */
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error = (ss->special->get_params)(ss);
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if (error)
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return (error);
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} else {
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/* XXX add code for SCSI2 scanner, if any */
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return (EOPNOTSUPP);
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}
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bcopy(&ss->sio, addr, sizeof(struct scan_io));
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break;
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case SCIOCSET:
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sio = (struct scan_io *)addr;
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if (ss->special->set_params) {
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/* call special handler */
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error = (ss->special->set_params)(ss, sio);
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if (error)
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return (error);
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} else {
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/* XXX add code for SCSI2 scanner, if any */
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return (EOPNOTSUPP);
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}
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break;
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case SCIOCRESTART:
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if (ss->special->rewind_scanner ) {
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/* call special handler */
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error = (ss->special->rewind_scanner)(ss);
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if (error)
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return (error);
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} else
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/* XXX add code for SCSI2 scanner, if any */
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return (EOPNOTSUPP);
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ss->flags &= ~SSF_TRIGGERED;
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break;
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#ifdef NOTYET
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case SCAN_USE_ADF:
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break;
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#endif
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default:
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if (SSMODE(dev) != MODE_CONTROL)
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return (ENOTTY);
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return (scsipi_do_ioctl(ss->sc_link, dev, cmd, addr, flag, p));
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}
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return (error);
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}
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