FreeBSD/Linux Kernel Cross Reference
sys/dev/isa/com_isa.c

     /*      $NetBSD: com_isa.c,v 1.21 2003/08/07 16:31:05 agc Exp $ */
     
     /*-
      * Copyright (c) 1998 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Charles M. Hannum.
      *
     * 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 the NetBSD
     *        Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``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 FOUNDATION OR CONTRIBUTORS
     * 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.
     */
    
    /*-
     * Copyright (c) 1991 The Regents of the University of California.
     * 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. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
     *
     *      @(#)com.c       7.5 (Berkeley) 5/16/91
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: com_isa.c,v 1.21 2003/08/07 16:31:05 agc Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/ioctl.h>
    #include <sys/select.h>
    #include <sys/tty.h>
    #include <sys/proc.h>
    #include <sys/user.h>
    #include <sys/file.h>
    #include <sys/uio.h>
    #include <sys/kernel.h>
    #include <sys/syslog.h>
    #include <sys/device.h>
    
    #include <machine/intr.h>
    #include <machine/bus.h>
    
    #include <dev/ic/comreg.h>
    #include <dev/ic/comvar.h>
    
    #include <dev/isa/isavar.h>
    
    struct com_isa_softc {
            struct  com_softc sc_com;       /* real "com" softc */
    
            /* ISA-specific goo. */
            void    *sc_ih;                 /* interrupt handler */
    };
   
   int com_isa_probe __P((struct device *, struct cfdata *, void *));
   void com_isa_attach __P((struct device *, struct device *, void *));
   void com_isa_cleanup __P((void *));
   
   CFATTACH_DECL(com_isa, sizeof(struct com_isa_softc),
       com_isa_probe, com_isa_attach, NULL, NULL);
   
   int
   com_isa_probe(parent, match, aux)
           struct device *parent;
           struct cfdata *match;
           void *aux;
   {
           bus_space_tag_t iot;
           bus_space_handle_t ioh;
           int iobase;
           int rv = 1;
           struct isa_attach_args *ia = aux;
   
           if (ia->ia_nio < 1)
                   return (0);
           if (ia->ia_nirq < 1)
                   return (0);
   
           if (ISA_DIRECT_CONFIG(ia))
                   return (0);
   
           /* Disallow wildcarded i/o address. */
           if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT)
                   return (0);
   
           /* Don't allow wildcarded IRQ. */
           if (ia->ia_irq[0].ir_irq == ISACF_IRQ_DEFAULT)
                   return (0);
   
           iot = ia->ia_iot;
           iobase = ia->ia_io[0].ir_addr;
   
           /* if it's in use as console, it's there. */
           if (!com_is_console(iot, iobase, 0)) {
                   if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
                           return 0;
                   }
                   rv = comprobe1(iot, ioh);
                   bus_space_unmap(iot, ioh, COM_NPORTS);
           }
   
           if (rv) {
                   ia->ia_nio = 1;
                   ia->ia_io[0].ir_size = COM_NPORTS;
   
                   ia->ia_nirq = 1;
   
                   ia->ia_niomem = 0;
                   ia->ia_ndrq = 0;
           }
           return (rv);
   }
   
   void
   com_isa_attach(parent, self, aux)
           struct device *parent, *self;
           void *aux;
   {
           struct com_isa_softc *isc = (void *)self;
           struct com_softc *sc = &isc->sc_com;
           int iobase, irq;
           bus_space_tag_t iot;
           struct isa_attach_args *ia = aux;
   
           /*
            * We're living on an isa.
            */
           iobase = sc->sc_iobase = ia->ia_io[0].ir_addr;
           iot = sc->sc_iot = ia->ia_iot;
           if (!com_is_console(iot, iobase, &sc->sc_ioh) &&
               bus_space_map(iot, iobase, COM_NPORTS, 0, &sc->sc_ioh)) {
                   printf(": can't map i/o space\n");
                   return;
           }
   
           sc->sc_frequency = COM_FREQ;
           irq = ia->ia_irq[0].ir_irq;
   
           com_attach_subr(sc);
   
           isc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE, IPL_SERIAL,
               comintr, sc);
   
           /*
            * Shutdown hook for buggy BIOSs that don't recognize the UART
            * without a disabled FIFO.
            */
           if (shutdownhook_establish(com_isa_cleanup, sc) == NULL)
                   panic("com_isa_attach: could not establish shutdown hook");
   }
   
   void
   com_isa_cleanup(arg)
           void *arg;
   {
           struct com_softc *sc = arg;
   
           if (ISSET(sc->sc_hwflags, COM_HW_FIFO))
                   bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_fifo, 0);
   }

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