2 * Video spigot capture driver.
4 * Copyright (c) 1995, Jim Lowe. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer. 2.
10 * Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
18 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
20 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
21 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * This is the minimum driver code required to make a spigot work.
27 * Unfortunatly, I can't include a real driver since the information
28 * on the spigot is under non-disclosure. You can pick up a library
29 * that will work with this driver from
30 * ftp://ftp.cs.uwm.edu/pub/FreeBSD-UWM. The library contains the
31 * source that I can release as well as several object modules and
32 * functions that allows one to read spigot data. See the code for
33 * spigot_grab.c that is included with the library data.
35 * The vendor will not allow me to release the spigot library code.
36 * Please don't ask me for it.
38 * To use this driver you will need the spigot library. The library is
41 * ftp.cs.uwm.edu://pub/FreeBSD-UWM/spigot/spigot.tar.gz
43 * Version 1.7, December 1995.
45 * $FreeBSD: src/sys/i386/isa/spigot.c,v 1.44 2000/01/29 16:17:36 peter Exp $
46 * $DragonFly: src/sys/dev/misc/spigot/spigot.c,v 1.15 2007/02/03 17:05:57 corecode Exp $
50 #include "use_spigot.h"
53 error "Can only have 1 spigot configured."
56 #include "opt_spigot.h"
58 #include <sys/param.h>
59 #include <sys/systm.h>
61 #include <sys/device.h>
63 #include <sys/signalvar.h>
66 #include <machine/frame.h>
67 #include <machine/md_var.h>
68 #include <machine/spigot.h>
69 #include <machine/psl.h>
71 #include <bus/isa/i386/isa_device.h>
73 static struct spigot_softc {
79 } spigot_softc[NSPIGOT];
85 #define UNIT(dev) minor(dev)
87 static int spigot_probe(struct isa_device *id);
88 static int spigot_attach(struct isa_device *id);
90 struct isa_driver spigotdriver = {spigot_probe, spigot_attach, "spigot"};
92 static d_open_t spigot_open;
93 static d_close_t spigot_close;
94 static d_read_t spigot_read;
95 static d_write_t spigot_write;
96 static d_ioctl_t spigot_ioctl;
97 static d_mmap_t spigot_mmap;
100 static struct dev_ops spigot_ops = {
101 { "spigot", CDEV_MAJOR, 0 },
102 .d_open = spigot_open,
103 .d_close = spigot_close,
104 .d_read = spigot_read,
105 .d_write = spigot_write,
106 .d_ioctl = spigot_ioctl,
107 .d_mmap = spigot_mmap,
110 static void spigintr(void *);
113 spigot_probe(struct isa_device *devp)
115 struct spigot_softc *ss;
118 ss = (struct spigot_softc *)&spigot_softc[devp->id_unit];
123 if(devp->id_iobase != 0xad6 || inb(0xad9) == 0xff)
124 status = 0; /* not found */
126 status = 1; /* found */
134 spigot_attach(struct isa_device *devp)
137 struct spigot_softc *ss= &spigot_softc[unit = devp->id_unit];
139 devp->id_intr = (inthand2_t *)spigintr;
140 ss->maddr = kvtop(devp->id_maddr);
141 ss->irq = devp->id_irq;
142 dev_ops_add(&spigot_ops, -1, unit);
143 make_dev(&spigot_ops, unit, 0, 0, 0644, "spigot%d", unit);
148 spigot_open(struct dev_open_args *ap)
150 cdev_t dev = ap->a_head.a_dev;
152 struct spigot_softc *ss;
154 ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
156 if((ss->flags & ALIVE) == 0)
162 #if !defined(SPIGOT_UNSECURE)
164 * Don't allow open() unless the process has sufficient privileges,
165 * since mapping the i/o page and granting i/o privilege would
166 * require sufficient privilege soon and nothing much can be done
169 error = suser_cred(ap->a_cred, 0);
184 spigot_close(struct dev_close_args *ap)
186 cdev_t dev = ap->a_head.a_dev;
187 struct spigot_softc *ss;
189 ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
200 spigot_write(struct dev_write_args *ap)
206 spigot_read(struct dev_read_args *ap)
213 spigot_ioctl(struct dev_ioctl_args *ap)
215 cdev_t dev = ap->a_head.a_dev;
216 caddr_t data = ap->a_data;
218 struct spigot_softc *ss;
219 struct spigot_info *info;
221 ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)];
227 if (*(int *)data < 0 || *(int *)data > _SIG_MAXSIG)
230 ss->signal_num = *((int *)data);
232 case SPIGOT_IOPL_ON: /* allow access to the IO PAGE */
233 #if !defined(SPIGOT_UNSECURE)
234 error = suser_cred(ap->a_cred, 0);
240 curthread->td_lwp->lwp_md.md_regs->tf_eflags |= PSL_IOPL;
242 case SPIGOT_IOPL_OFF: /* deny access to the IO PAGE */
243 curthread->td_lwp->lwp_md.md_regs->tf_eflags &= ~PSL_IOPL;
245 case SPIGOT_GET_INFO:
246 info = (struct spigot_info *)data;
247 info->maddr = ss->maddr;
258 * Interrupt procedure.
259 * Just call a user level interrupt routine.
265 struct spigot_softc *ss;
267 ss = (struct spigot_softc *)&spigot_softc[unit];
268 if(ss->p && ss->signal_num)
269 ksignal(ss->p, ss->signal_num);
273 spigot_mmap(struct dev_mmap_args *ap)
275 struct spigot_softc *ss;
277 ss = (struct spigot_softc *)&spigot_softc[0];
278 if (ap->a_offset != 0)
280 if (ap->a_nprot & PROT_EXEC)
282 ap->a_result = i386_btop(ss->maddr);