d77d6869b1
which contain 'standard' com- and lpt-type ports. Some of these present as PCI simple-communications/serial or simple-communications/parallel devices, but many do not. (Additionally, there is no document that I can find that describes the "specific well-konwn register-level" description of how the 'standard' devices' config space headers shold work.) Eventually, some of the devices driven by this code should become simple pci attachments for the 'lpt' and 'com' drivers, but that requires solid documentation.
128 lines
4.1 KiB
C
128 lines
4.1 KiB
C
/* $NetBSD: com_puc.c,v 1.1 1998/06/26 18:52:41 cgd Exp $ */
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/*
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* Copyright (c) 1998 Christopher G. Demetriou. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christopher G. Demetriou
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* for the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Machine-independent ns16x50 serial port ('com') driver attachment to
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* "PCI Universal Communications" controller driver.
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*
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* Author: Christopher G. Demetriou, May 17, 1998.
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/tty.h>
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#include <machine/bus.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pucvar.h>
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#include <dev/ic/comreg.h>
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#include <dev/ic/comvar.h>
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struct com_puc_softc {
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struct com_softc sc_com; /* real "com" softc */
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/* puc-specific goo. */
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void *sc_ih; /* interrupt handler */
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};
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int com_puc_probe __P((struct device *, struct cfdata *, void *));
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void com_puc_attach __P((struct device *, struct device *, void *));
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struct cfattach com_puc_ca = {
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sizeof(struct com_puc_softc), com_puc_probe, com_puc_attach
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};
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int
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com_puc_probe(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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struct puc_attach_args *aa = aux;
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/*
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* Locators already matched, just check the type.
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*/
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if (aa->type != PUC_PORT_TYPE_COM)
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return (0);
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return (1);
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}
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void
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com_puc_attach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct com_puc_softc *psc = (void *)self;
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struct com_softc *sc = &psc->sc_com;
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struct puc_attach_args *aa = aux;
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const char *intrstr;
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/*
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* XXX This driver assumes that 'com' ports attached to 'puc'
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* XXX can not be console. That isn't unreasonable, because PCI
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* XXX devices are supposed to be dynamically mapped, and com
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* XXX console ports want fixed addresses. When/if baseboard
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* XXX 'com' ports are identified as PCI/communications/serial
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* XXX devices and are known to be mapped at the standard
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* XXX addresses, if they can be the system console then we have
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* XXX to cope with doing the mapping right. Then this will get
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* XXX really ugly. Of course, by then we might know the real
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* XXX definition of PCI/communications/serial, and attach 'com'
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* XXX directly on PCI.
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*/
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sc->sc_iobase = aa->a;
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sc->sc_iot = aa->t;
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sc->sc_ioh = aa->h;
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sc->sc_frequency = COM_FREQ;
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intrstr = pci_intr_string(aa->pc, aa->intrhandle);
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psc->sc_ih = pci_intr_establish(aa->pc, aa->intrhandle, IPL_SERIAL,
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comintr, sc);
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if (psc->sc_ih == NULL) {
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printf(": couldn't establish interrupt");
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if (intrstr != NULL)
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printf(" at %s", intrstr);
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printf("\n");
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return;
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}
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printf(": interrupting at %s\n", intrstr);
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printf("%s", sc->sc_dev.dv_xname);
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com_attach_subr(sc);
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}
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