/* * Copyright (c) 2001 Thomas Coffy. * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Terrence R. Lambert. * 4. The name Terrence R. Lambert may not be used to endorse or promote * products derived from this software without specific prior written * permission. * * THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``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 TERRENCE R. LAMBERT 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. */ /* * Basic lkm driver for making coffee from a shell. * 0x3bc for /dev/lp0, 0x378 for /dev/lp1, and 0x278 for /dev/lp2 */ #include #include #include #include #include #include #define PORT_ADDR 0x378 /* lpt1 */ int coffee_load __P((struct lkm_table *, int)); int coffee __P((struct lkm_table *, int, int)); int coffee_open __P((dev_t, int, int, struct proc *)); int coffee_read __P((dev_t, struct uio *, int)); static struct cdevsw coffee_cdevsw = { coffee_open, (dev_type_close((*))) enodev, coffee_read, (dev_type_write((*))) enodev, (dev_type_ioctl((*))) enodev, (dev_type_stop((*))) enodev, 0, seltrue, (dev_type_mmap((*))) enodev, 0 }; MOD_DEV("coffee", LM_DT_CHAR, -1, &coffee_cdevsw ); int coffee(lkmtp, cmd, ver) struct lkm_table *lkmtp; int cmd; int ver; { DISPATCH(lkmtp, cmd, ver, coffee_load, lkm_nofunc, lkm_nofunc); return 0; } int coffee_load(lkmtp, cmd) struct lkm_table *lkmtp; int cmd; { if (cmd==LKM_E_LOAD) printf("Coffee driver loaded.\n"); if (cmd==LKM_E_UNLOAD) printf("Coffee driver unloaded.\n"); return 0; } /* * Open the device */ int coffee_open(dev, oflags, devtype, p) dev_t dev; int oflags; int devtype; struct proc *p; { int s; /* set power everywhere on the // port */ s = splhigh(); outb(PORT_ADDR, 255); splx(s); return 0; } int coffee_read(dev, uio, ioflag) dev_t dev; struct uio *uio; int ioflag; { int s; /* set power everywhere on the // port */ s = splhigh(); outb(PORT_ADDR, 0); splx(s); return 0; }