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      1 /*	$NetBSD: lpt_puc.c,v 1.19 2018/11/30 16:26:59 jmcneill Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1998 Christopher G. Demetriou.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *      This product includes software developed by Christopher G. Demetriou
     17  *	for the NetBSD Project.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 /*
     34  * Machine-independent parallel port ('lpt') driver attachment to "PCI
     35  * Universal Communications" controller driver.
     36  *
     37  * Author: Christopher G. Demetriou, May 17, 1998.
     38  */
     39 
     40 #include <sys/cdefs.h>
     41 __KERNEL_RCSID(0, "$NetBSD: lpt_puc.c,v 1.19 2018/11/30 16:26:59 jmcneill Exp $");
     42 
     43 #include <sys/param.h>
     44 #include <sys/systm.h>
     45 #include <sys/device.h>
     46 
     47 #include <sys/bus.h>
     48 
     49 #include <dev/pci/pcivar.h>
     50 #include <dev/pci/pucvar.h>
     51 #include <dev/ic/lptvar.h>
     52 
     53 static int
     54 lpt_puc_probe(device_t parent, cfdata_t match, void *aux)
     55 {
     56 	struct puc_attach_args *aa = aux;
     57 
     58 	/*
     59 	 * Locators already matched, just check the type.
     60 	 */
     61 	if (aa->type != PUC_PORT_TYPE_LPT)
     62 		return (0);
     63 
     64 	return (1);
     65 }
     66 
     67 static void
     68 lpt_puc_attach(device_t parent, device_t self, void *aux)
     69 {
     70 	struct lpt_softc *sc = device_private(self);
     71 	struct puc_attach_args *aa = aux;
     72 	const char *intrstr;
     73 	char intrbuf[PCI_INTRSTR_LEN];
     74 
     75 	sc->sc_dev = self;
     76 	sc->sc_iot = aa->t;
     77 	sc->sc_ioh = aa->h;
     78 
     79 	if (aa->poll) {
     80 		aprint_error(": polling not supported\n");
     81 		return;
     82 	}
     83 
     84 	aprint_naive(": Parallel port");
     85 	aprint_normal(": ");
     86 
     87 	intrstr = pci_intr_string(aa->pc, aa->intrhandle, intrbuf,
     88 	    sizeof(intrbuf));
     89 	sc->sc_ih = pci_intr_establish_xname(aa->pc, aa->intrhandle, IPL_TTY,
     90 	    lptintr, sc, device_xname(self));
     91 	if (sc->sc_ih == NULL) {
     92 		aprint_error("couldn't establish interrupt");
     93 		if (intrstr != NULL)
     94 			aprint_error(" at %s", intrstr);
     95 		aprint_error("\n");
     96 		return;
     97 	}
     98 
     99 #if defined(amd64) || defined(i386)
    100 	/*
    101 	 * Parallel ports are sometimes used for improvised GPIO by
    102 	 * userspace programs which need to know the port's I/O address.
    103 	 * Print the address here so the user doesn't have to dig through
    104 	 * PCI configuration space to find it.
    105 	*/
    106 	if (aa->h < 0x10000)
    107 		aprint_normal("ioaddr 0x%04lx, ", aa->h);
    108 #endif
    109 	aprint_normal("interrupting at %s\n", intrstr);
    110 
    111 	if (!pmf_device_register(self, NULL, NULL))
    112 		aprint_error_dev(self, "couldn't establish power handler\n");
    113 
    114 	lpt_attach_subr(sc);
    115 }
    116 
    117 CFATTACH_DECL_NEW(lpt_puc, sizeof(struct lpt_softc),
    118     lpt_puc_probe, lpt_puc_attach, NULL, NULL);
    119