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com_puc.c revision 1.15 
      1 /*	$NetBSD: com_puc.c,v 1.15 2006/10/12 01:31:28 christos 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/cdefs.h>
     41 __KERNEL_RCSID(0, "$NetBSD: com_puc.c,v 1.15 2006/10/12 01:31:28 christos Exp $");
     42 
     43 #include <sys/param.h>
     44 #include <sys/systm.h>
     45 #include <sys/device.h>
     46 #include <sys/tty.h>
     47 
     48 #include <machine/bus.h>
     49 
     50 #include <dev/pci/pcivar.h>
     51 #include <dev/pci/pucvar.h>
     52 #include <dev/ic/comreg.h>
     53 #include <dev/ic/comvar.h>
     54 #include <dev/pci/cybervar.h>
     55 
     56 struct com_puc_softc {
     57 	struct com_softc sc_com;	/* real "com" softc */
     58 
     59 	/* puc-specific goo. */
     60 	void	*sc_ih;			/* interrupt handler */
     61 };
     62 
     63 static int
     64 com_puc_probe(struct device *parent __unused, struct cfdata *match __unused,
     65     void *aux)
     66 {
     67 	struct puc_attach_args *aa = aux;
     68 
     69 	/*
     70 	 * Locators already matched, just check the type.
     71 	 */
     72 	if (aa->type != PUC_PORT_TYPE_COM)
     73 		return (0);
     74 
     75 	return (1);
     76 }
     77 
     78 static void
     79 com_puc_attach(struct device *parent __unused, struct device *self, void *aux)
     80 {
     81 	struct com_puc_softc *psc = (void *)self;
     82 	struct com_softc *sc = &psc->sc_com;
     83 	struct puc_attach_args *aa = aux;
     84 	const char *intrstr;
     85 
     86 	/*
     87 	 * XXX This driver assumes that 'com' ports attached to 'puc'
     88 	 * XXX can not be console.  That isn't unreasonable, because PCI
     89 	 * XXX devices are supposed to be dynamically mapped, and com
     90 	 * XXX console ports want fixed addresses.  When/if baseboard
     91 	 * XXX 'com' ports are identified as PCI/communications/serial
     92 	 * XXX devices and are known to be mapped at the standard
     93 	 * XXX addresses, if they can be the system console then we have
     94 	 * XXX to cope with doing the mapping right.  Then this will get
     95 	 * XXX really ugly.  Of course, by then we might know the real
     96 	 * XXX definition of PCI/communications/serial, and attach 'com'
     97 	 * XXX directly on PCI.
     98 	 */
     99 
    100 	aprint_naive(": Serial port\n");
    101 
    102 	COM_INIT_REGS(sc->sc_regs, aa->t, aa->h, aa->a);
    103 	sc->sc_frequency = aa->flags & PUC_COM_CLOCKMASK;
    104 
    105 	/* Enable Cyberserial 8X clock. */
    106 	if (aa->flags & (PUC_COM_SIIG10x|PUC_COM_SIIG20x)) {
    107 		int usrregno;
    108 
    109 		if	(aa->flags & PUC_PORT_USR3) usrregno = 3;
    110 		else if (aa->flags & PUC_PORT_USR2) usrregno = 2;
    111 		else if (aa->flags & PUC_PORT_USR1) usrregno = 1;
    112 		else /* (aa->flags & PUC_PORT_USR0) */ usrregno = 0;
    113 
    114 		if (aa->flags & PUC_COM_SIIG10x)
    115 			write_siig10x_usrreg(aa->pc, aa->tag, usrregno, 1);
    116 		else
    117 			write_siig20x_usrreg(aa->pc, aa->tag, usrregno, 1);
    118 	}
    119 
    120 	intrstr = pci_intr_string(aa->pc, aa->intrhandle);
    121 	psc->sc_ih = pci_intr_establish(aa->pc, aa->intrhandle, IPL_SERIAL,
    122 	    comintr, sc);
    123 	if (psc->sc_ih == NULL) {
    124 		aprint_error(": couldn't establish interrupt");
    125 		if (intrstr != NULL)
    126 			aprint_normal(" at %s", intrstr);
    127 		aprint_normal("\n");
    128 		return;
    129 	}
    130 	aprint_normal(": interrupting at %s\n", intrstr);
    131 	aprint_normal("%s", sc->sc_dev.dv_xname);
    132 
    133 	com_attach_subr(sc);
    134 }
    135 
    136 CFATTACH_DECL(com_puc, sizeof(struct com_puc_softc),
    137     com_puc_probe, com_puc_attach, NULL, NULL);
    138