/* * Video spigot capture driver. * * Copyright (c) 1995, Jim Lowe. All rights reserved. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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. * * This is the minimum driver code required to make a spigot work. * Unfortunatly, I can't include a real driver since the information * on the spigot is under non-disclosure. You can pick up a library * that will work with this driver from ftp://ftp.cs.uwm.edu/pub/FreeBSD. * The library contains the source that I can release as well as several * object modules and functions that allows one to read spigot data. * See the code for spigot_grab.c that is included with the library * data. * * The vendor will not allow me to release the spigot library code. * Please don't ask me for it. * * To use this driver you will need the spigot library. The library is * available from: * * ftp.cs.uwm.edu://pub/FreeBSD/spigot/spigot.tar.gz * * Version 1.7, December 1995. * */ #include "spigot.h" #if NSPIGOT > 0 #if NSPIGOT > 1 error "Can only have 1 spigot configured." #endif #include #include #include #include #include #include #include #ifdef DEVFS #include #endif /* DEVFS */ #include #include #include #include #include static struct spigot_softc { u_long flags; u_long maddr; struct proc *p; u_long signal_num; u_short irq; #ifdef DEVFS void *devfs_token; #endif } spigot_softc[NSPIGOT]; /* flags in softc */ #define OPEN 0x01 #define ALIVE 0x02 #define UNIT(dev) minor(dev) static int spigot_probe(struct isa_device *id); static int spigot_attach(struct isa_device *id); struct isa_driver spigotdriver = {spigot_probe, spigot_attach, "spigot"}; static d_open_t spigot_open; static d_close_t spigot_close; static d_read_t spigot_read; static d_write_t spigot_write; static d_ioctl_t spigot_ioctl; static d_mmap_t spigot_mmap; #define CDEV_MAJOR 11 static struct cdevsw spigot_cdevsw = { spigot_open, spigot_close, spigot_read, spigot_write, /*11*/ spigot_ioctl, nostop, nullreset, nodevtotty,/* Spigot */ seltrue, spigot_mmap, NULL, "spigot", NULL, -1 }; static int spigot_probe(struct isa_device *devp) { int status; struct spigot_softc *ss=(struct spigot_softc *)&spigot_softc[devp->id_unit]; ss->flags = 0; ss->maddr = 0; ss->irq = 0; if(devp->id_iobase != 0xad6 || inb(0xad9) == 0xff) status = 0; /* not found */ else { status = 1; /* found */ ss->flags |= ALIVE; } return(status); } static int spigot_attach(struct isa_device *devp) { int unit; struct spigot_softc *ss= &spigot_softc[unit = devp->id_unit]; ss->maddr = kvtop(devp->id_maddr); ss->irq = devp->id_irq; #ifdef DEVFS ss->devfs_token = devfs_add_devswf(&spigot_cdevsw, unit, DV_CHR, 0, 0, 0644, "spigot%d", unit); #endif return 1; } static int spigot_open(dev_t dev, int flags, int fmt, struct proc *p) { int error; struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)]; if((ss->flags & ALIVE) == 0) return ENXIO; if(ss->flags & OPEN) return EBUSY; #if !defined(SPIGOT_UNSECURE) /* * Don't allow open() unless the process has sufficient privileges, * since mapping the i/o page and granting i/o privilege would * require sufficient privilege soon and nothing much can be done * without them. */ error = suser(p->p_ucred, &p->p_acflag); if (error != 0) return error; if (securelevel > 0) return EPERM; #endif ss->flags |= OPEN; ss->p = 0; ss->signal_num = 0; return 0; } static int spigot_close(dev_t dev, int flags, int fmt, struct proc *p) { struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)]; ss->flags &= ~OPEN; ss->p = 0; ss->signal_num = 0; outb(0xad6, 0); return 0; } static int spigot_write(dev_t dev, struct uio *uio, int ioflag) { return ENXIO; } static int spigot_read(dev_t dev, struct uio *uio, int ioflag) { return ENXIO; } static int spigot_ioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p) { int error; struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[UNIT(dev)]; struct spigot_info *info; if(!data) return(EINVAL); switch(cmd){ case SPIGOT_SETINT: ss->p = p; ss->signal_num = *((int *)data); break; case SPIGOT_IOPL_ON: /* allow access to the IO PAGE */ #if !defined(SPIGOT_UNSECURE) error = suser(p->p_ucred, &p->p_acflag); if (error != 0) return error; if (securelevel > 0) return EPERM; #endif p->p_md.md_regs->tf_eflags |= PSL_IOPL; break; case SPIGOT_IOPL_OFF: /* deny access to the IO PAGE */ p->p_md.md_regs->tf_eflags &= ~PSL_IOPL; break; case SPIGOT_GET_INFO: info = (struct spigot_info *)data; info->maddr = ss->maddr; info->irq = ss->irq; break; default: return ENOTTY; } return 0; } /* * Interrupt procedure. * Just call a user level interrupt routine. */ void spigintr(int unit) { struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[unit]; if(ss->p && ss->signal_num) psignal(ss->p, ss->signal_num); } static int spigot_mmap(dev_t dev, int offset, int nprot) { struct spigot_softc *ss = (struct spigot_softc *)&spigot_softc[0]; if(offset != 0) { printf("spigot mmap failed, offset = 0x%x != 0x0\n", offset); return -1; } if(nprot & PROT_EXEC) return -1; return i386_btop(ss->maddr); } static spigot_devsw_installed = 0; static void spigot_drvinit(void *unused) { dev_t dev; if( ! spigot_devsw_installed ) { dev = makedev(CDEV_MAJOR, 0); cdevsw_add(&dev,&spigot_cdevsw, NULL); spigot_devsw_installed = 1; } } SYSINIT(spigotdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,spigot_drvinit,NULL) #endif /* NSPIGOT */