FreeBSD/Linux Kernel Cross Reference
sys/dev/ofisa/com_ofisa.c

     /*      $NetBSD: com_ofisa.c,v 1.7 2002/10/02 16:34:27 thorpej Exp $    */
     
     /*
      * Copyright 1997, 1998
      * Digital Equipment Corporation. All rights reserved.
      *
      * This software is furnished under license and may be used and
      * copied only in accordance with the following terms and conditions.
      * Subject to these conditions, you may download, copy, install,
     * use, modify and distribute this software in source and/or binary
     * form. No title or ownership is transferred hereby.
     *
     * 1) Any source code used, modified or distributed must reproduce
     *    and retain this copyright notice and list of conditions as
     *    they appear in the source file.
     *
     * 2) No right is granted to use any trade name, trademark, or logo of
     *    Digital Equipment Corporation. Neither the "Digital Equipment
     *    Corporation" name nor any trademark or logo of Digital Equipment
     *    Corporation may be used to endorse or promote products derived
     *    from this software without the prior written permission of
     *    Digital Equipment Corporation.
     *
     * 3) This software is provided "AS-IS" and any express or implied
     *    warranties, including but not limited to, any implied warranties
     *    of merchantability, fitness for a particular purpose, or
     *    non-infringement are disclaimed. In no event shall DIGITAL be
     *    liable for any damages whatsoever, and in particular, DIGITAL
     *    shall not be liable for special, indirect, consequential, or
     *    incidental damages or damages for lost profits, loss of
     *    revenue or loss of use, whether such damages arise in contract,
     *    negligence, tort, under statute, in equity, at law or otherwise,
     *    even if advised of the possibility of such damage.
     */
    
    /*
     * OFW Attachment for 'com' serial driver
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: com_ofisa.c,v 1.7 2002/10/02 16:34:27 thorpej Exp $");
    
    #include <sys/param.h>
    #include <sys/device.h>
    #include <sys/systm.h>
    #include <sys/tty.h>
    
    #include <machine/intr.h>
    #include <machine/bus.h>
    
    #include <dev/ofw/openfirm.h>
    #include <dev/isa/isavar.h>
    #include <dev/ofisa/ofisavar.h>
    
    #include <dev/ic/comreg.h>
    #include <dev/ic/comvar.h>
    
    struct com_ofisa_softc {
            struct  com_softc sc_com;       /* real "com" softc */
    
            /* OFW ISA-specific goo. */
            void    *sc_ih;                 /* interrupt handler */
    };
    
    int com_ofisa_probe __P((struct device *, struct cfdata *, void *));
    void com_ofisa_attach __P((struct device *, struct device *, void *));
    
    CFATTACH_DECL(com_ofisa, sizeof(struct com_ofisa_softc),
        com_ofisa_probe, com_ofisa_attach, NULL, NULL);
    
    int
    com_ofisa_probe(parent, cf, aux)
            struct device *parent;
            struct cfdata *cf;
            void *aux;
    {
            struct ofisa_attach_args *aa = aux;
            static const char *const compatible_strings[] = { "pnpPNP,501", NULL };
            int rv = 0;
    
            if (of_compatible(aa->oba.oba_phandle, compatible_strings) != -1)
                    rv = 5;
    #ifdef _COM_OFISA_MD_MATCH
            if (!rv)
                    rv = com_ofisa_md_match(parent, cf, aux);
    #endif
            return (rv);
    }
    
    void
    com_ofisa_attach(parent, self, aux)
            struct device *parent, *self;
            void *aux;
    {
            struct com_ofisa_softc *osc = (void *)self;
            struct com_softc *sc = &osc->sc_com;
            struct ofisa_attach_args *aa = aux;
            struct ofisa_reg_desc reg;
            struct ofisa_intr_desc intr;
           int freq;
           char freqbuf[4];
           int n;
   
           /*
            * We're living on an ofw.  We have to ask the OFW what our
            * registers and interrupts properties look like.
            *
            * We expect exactly one register region and one interrupt.
            */
   
           n = ofisa_reg_get(aa->oba.oba_phandle, &reg, 1);
   #ifdef _COM_OFISA_MD_REG_FIXUP
           n = com_ofisa_md_reg_fixup(parent, self, aux, &reg, 1, n);
   #endif
           if (n != 1) {
                   printf(": error getting register data\n");
                   return;
           }
           if (reg.len != 8) {
                   printf(": weird register size (%lu, expected 8)\n",
                       (unsigned long)reg.len);
                   return;
           }
   
           n = ofisa_intr_get(aa->oba.oba_phandle, &intr, 1);
   #ifdef _COM_OFISA_MD_INTR_FIXUP
           n = com_ofisa_md_intr_fixup(parent, self, aux, &intr, 1, n);
   #endif
           if (n != 1) {
                   printf(": error getting interrupt data\n");
                   return;
           }
   
           if (OF_getproplen(aa->oba.oba_phandle, "clock-frequency") != 4 ||
               OF_getprop(aa->oba.oba_phandle, "clock-frequency", freqbuf,
                 sizeof freqbuf) != 4)
                   freq = COM_FREQ;
           else
                   freq = of_decode_int(&freqbuf[0]);
   
           sc->sc_iot = (reg.type == OFISA_REG_TYPE_IO) ? aa->iot : aa->memt;
           sc->sc_iobase = reg.addr;
           sc->sc_frequency = freq;
   
           if (!com_is_console(sc->sc_iot, sc->sc_iobase, &sc->sc_ioh) &&
               bus_space_map(sc->sc_iot, sc->sc_iobase, reg.len, 0,
                 &sc->sc_ioh)) {
                   printf(": can't map register space\n");
                   return;
           }
   
           osc->sc_ih = isa_intr_establish(aa->ic, intr.irq, intr.share,
               IPL_SERIAL, comintr, sc);
   
           com_attach_subr(sc);
   
   #if 0
           printf("%s: registers: ", sc->sc_dev.dv_xname);
           ofisa_reg_print(&reg, 1);
           printf("\n");
           printf("%s: interrupts: ", sc->sc_dev.dv_xname);
           ofisa_intr_print(&intr, 1);
           printf("\n");
   #endif
   }

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