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com_puc.c revision 1.2 
      1 /*	$NetBSD: com_puc.c,v 1.2 2001/03/16 16:43:54 bouyer 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 ns16x50 serial port ('com') driver attachment to
     35  * "PCI Universal Communications" controller driver.
     36  *
     37  * Author: Christopher G. Demetriou, May 17, 1998.
     38  */
     39 
     40 #include <sys/types.h>
     41 #include <sys/param.h>
     42 #include <sys/systm.h>
     43 #include <sys/device.h>
     44 #include <sys/tty.h>
     45 
     46 #include <machine/bus.h>
     47 
     48 #include <dev/pci/pcivar.h>
     49 #include <dev/pci/pucvar.h>
     50 #include <dev/ic/comreg.h>
     51 #include <dev/ic/comvar.h>
     52 
     53 struct com_puc_softc {
     54 	struct com_softc sc_com;	/* real "com" softc */
     55 
     56 	/* puc-specific goo. */
     57 	void	*sc_ih;			/* interrupt handler */
     58 };
     59 
     60 int	com_puc_probe __P((struct device *, struct cfdata *, void *));
     61 void	com_puc_attach __P((struct device *, struct device *, void *));
     62 
     63 struct cfattach com_puc_ca = {
     64 	sizeof(struct com_puc_softc), com_puc_probe, com_puc_attach
     65 };
     66 
     67 int
     68 com_puc_probe(parent, match, aux)
     69 	struct device *parent;
     70 	struct cfdata *match;
     71 	void *aux;
     72 {
     73 	struct puc_attach_args *aa = aux;
     74 
     75 	/*
     76 	 * Locators already matched, just check the type.
     77 	 */
     78 	if (aa->type != PUC_PORT_TYPE_COM)
     79 		return (0);
     80 
     81 	return (1);
     82 }
     83 
     84 void
     85 com_puc_attach(parent, self, aux)
     86 	struct device *parent, *self;
     87 	void *aux;
     88 {
     89 	struct com_puc_softc *psc = (void *)self;
     90 	struct com_softc *sc = &psc->sc_com;
     91 	struct puc_attach_args *aa = aux;
     92 	const char *intrstr;
     93 
     94 	/*
     95 	 * XXX This driver assumes that 'com' ports attached to 'puc'
     96 	 * XXX can not be console.  That isn't unreasonable, because PCI
     97 	 * XXX devices are supposed to be dynamically mapped, and com
     98 	 * XXX console ports want fixed addresses.  When/if baseboard
     99 	 * XXX 'com' ports are identified as PCI/communications/serial
    100 	 * XXX devices and are known to be mapped at the standard
    101 	 * XXX addresses, if they can be the system console then we have
    102 	 * XXX to cope with doing the mapping right.  Then this will get
    103 	 * XXX really ugly.  Of course, by then we might know the real
    104 	 * XXX definition of PCI/communications/serial, and attach 'com'
    105 	 * XXX directly on PCI.
    106 	 */
    107 
    108 	sc->sc_iobase = aa->a;
    109 	sc->sc_iot = aa->t;
    110 	sc->sc_ioh = aa->h;
    111 	sc->sc_frequency = aa->flags & PUC_COM_CLOCKMASK;
    112 
    113 	intrstr = pci_intr_string(aa->pc, aa->intrhandle);
    114 	psc->sc_ih = pci_intr_establish(aa->pc, aa->intrhandle, IPL_SERIAL,
    115 	    comintr, sc);
    116 	if (psc->sc_ih == NULL) {
    117 		printf(": couldn't establish interrupt");
    118 		if (intrstr != NULL)
    119 			printf(" at %s", intrstr);
    120 		printf("\n");
    121 		return;
    122 	}
    123 	printf(": interrupting at %s\n", intrstr);
    124 	printf("%s", sc->sc_dev.dv_xname);
    125 
    126 	com_attach_subr(sc);
    127 }
    128