NetBSD/sys/scsi/ss.c

480 lines
12 KiB
C

/* $NetBSD: ss.c,v 1.7 1996/03/05 00:15:18 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 <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/fcntl.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/device.h>
#include <sys/conf.h> /* for cdevsw */
#include <sys/scanio.h>
#include <scsi/scsi_all.h>
#include <scsi/scsi_scanner.h>
#include <scsi/scsiconf.h>
#include <scsi/ssvar.h>
#include <scsi/ss_mustek.h>
#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 *, void *, void *));
void ssattach __P((struct device *, struct device *, void *));
struct cfdriver sscd = {
NULL, "ss", ssmatch, ssattach, DV_DULL, sizeof(struct ss_softc)
};
void ssstrategy __P((struct buf *));
void ssstart __P((void *));
struct scsi_device ss_switch = {
NULL,
ssstart,
NULL,
NULL,
};
struct scsi_inquiry_pattern ss_patterns[] = {
{T_SCANNER, T_FIXED,
"", "", ""},
{T_SCANNER, T_REMOV,
"", "", ""},
{T_PROCESSOR, T_FIXED,
"HP ", "C1750A ", ""},
{T_PROCESSOR, T_FIXED,
"HP ", "C2500A ", ""},
};
int
ssmatch(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct scsibus_attach_args *sa = aux;
int priority;
(void)scsi_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 scsibus_attach_args *sa = aux;
struct scsi_link *sc_link = sa->sa_sc_link;
SC_DEBUG(sc_link, SDEV_DB2, ("ssattach: "));
/*
* 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 ", 8))
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;
printf("\n");
}
/*
* 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 = 0;
struct ss_softc *ss;
struct scsi_link *sc_link;
unit = SSUNIT(dev);
if (unit >= sscd.cd_ndevs)
return (ENXIO);
ss = sscd.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, sscd.cd_ndevs));
if (sc_link->flags & SDEV_OPEN) {
printf("%s: already open\n", ss->sc_dev.dv_xname);
return (EBUSY);
}
/*
* Catch any unit attention errors.
*
* SCSI_IGNORE_MEDIA_CHANGE: when you have an ADF, some scanners
* consider paper to be a changeable media
*
*/
error = scsi_test_unit_ready(sc_link,
SCSI_IGNORE_MEDIA_CHANGE | SCSI_IGNORE_ILLEGAL_REQUEST |
(ssmode == MODE_CONTROL ? SCSI_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:
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)
dev_t dev;
{
struct ss_softc *ss = sscd.cd_devs[SSUNIT(dev)];
int error;
SC_DEBUG(ss->sc_link, SDEV_DB1, ("closing\n"));
if (SSMODE(dev) == MODE_REWIND) {
if (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;
}
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 = sscd.cd_devs[SSUNIT(bp->b_dev)];
(ss->sc_link->adapter->scsi_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->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 = sscd.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->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 = sscd.cd_devs[SSUNIT(bp->b_dev)];
struct buf *dp;
int s;
SC_DEBUG(ss->sc_link, SDEV_DB1,
("ssstrategy %d bytes @ blk %d\n", bp->b_bcount, bp->b_blkno));
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;
bad:
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 scsi_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 scsi_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->openings > 0) {
/* 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->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 = sscd.cd_devs[SSUNIT(dev)];
int error = 0;
int unit;
struct scan_io *sio;
switch (cmd) {
case SCIOCGET:
if (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->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->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 (scsi_do_ioctl(ss->sc_link, dev, cmd, addr, flag, p));
}
return (error);
}