rtfps.c

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    1 /*      $NetBSD: rtfps.c,v 1.46 2003/01/01 00:10:21 thorpej Exp $       */
    2 
    3 /*
    4  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
    5  * Copyright (c) 1995 Charles M. Hannum.  All rights reserved.
    6  *
    7  * This code is derived from public-domain software written by
    8  * Roland McGrath.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. All advertising materials mentioning features or use of this software
   19  *    must display the following acknowledgement:
   20  *      This product includes software developed by Charles M. Hannum.
   21  * 4. The name of the author may not be used to endorse or promote products
   22  *    derived from this software without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   25  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   26  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   27  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   28  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   29  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   30  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   31  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   32  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   33  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   34  */
   35 
   36 #include <sys/cdefs.h>
   37 __KERNEL_RCSID(0, "$NetBSD: rtfps.c,v 1.46 2003/01/01 00:10:21 thorpej Exp $");
   38 
   39 #include <sys/param.h>
   40 #include <sys/systm.h>
   41 #include <sys/device.h>
   42 #include <sys/termios.h>
   43 
   44 #include <machine/bus.h>
   45 #include <machine/intr.h>
   46 
   47 #include <dev/ic/comreg.h>
   48 #include <dev/ic/comvar.h>
   49 
   50 #include <dev/isa/isavar.h>
   51 #include <dev/isa/com_multi.h>
   52 
   53 #define NSLAVES 4
   54 
   55 struct rtfps_softc {
   56         struct device sc_dev;
   57         void *sc_ih;
   58 
   59         bus_space_tag_t sc_iot;
   60         int sc_iobase;
   61         int sc_irqport;
   62         bus_space_handle_t sc_irqioh;
   63 
   64         int sc_alive;                   /* mask of slave units attached */
   65         void *sc_slaves[NSLAVES];       /* com device unit numbers */
   66         bus_space_handle_t sc_slaveioh[NSLAVES];
   67 };
   68 
   69 int rtfpsprobe __P((struct device *, struct cfdata *, void *));
   70 void rtfpsattach __P((struct device *, struct device *, void *));
   71 int rtfpsintr __P((void *));
   72 int rtfpsprint __P((void *, const char *));
   73 
   74 CFATTACH_DECL(rtfps, sizeof(struct rtfps_softc),
   75     rtfpsprobe, rtfpsattach, NULL, NULL);
   76 
   77 int
   78 rtfpsprobe(parent, self, aux)
   79         struct device *parent;
   80         struct cfdata *self;
   81         void *aux;
   82 {
   83         struct isa_attach_args *ia = aux;
   84         bus_space_tag_t iot = ia->ia_iot;
   85         bus_space_handle_t ioh;
   86         int i, iobase, rv = 1;
   87 
   88         /*
   89          * Do the normal com probe for the first UART and assume
   90          * its presence, and the ability to map the other UARTS,
   91          * means there is a multiport board there.
   92          * XXX Needs more robustness.
   93          */
   94 
   95         if (ia->ia_nio < 1)
   96                 return (0);
   97         if (ia->ia_nirq < 1)
   98                 return (0);
   99 
  100         /* Disallow wildcarded i/o address. */
  101         if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT)
  102                 return (0);
  103         if (ia->ia_irq[0].ir_irq == ISACF_IRQ_DEFAULT)
  104                 return (0);
  105 
  106         /* if the first port is in use as console, then it. */
  107         if (com_is_console(iot, ia->ia_io[0].ir_addr, 0))
  108                 goto checkmappings;
  109 
  110         if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) {
  111                 rv = 0;
  112                 goto out;
  113         }
  114         rv = comprobe1(iot, ioh);
  115         bus_space_unmap(iot, ioh, COM_NPORTS);
  116         if (rv == 0)
  117                 goto out;
  118 
  119 checkmappings:
  120         for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) {
  121                 iobase += COM_NPORTS;
  122 
  123                 if (com_is_console(iot, iobase, 0))
  124                         continue;
  125 
  126                 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
  127                         rv = 0;
  128                         goto out;
  129                 }
  130                 bus_space_unmap(iot, ioh, COM_NPORTS);
  131         }
  132 
  133 out:
  134         if (rv) {
  135                 ia->ia_nio = 1;
  136                 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS;
  137 
  138                 ia->ia_nirq = 1;
  139 
  140                 ia->ia_niomem = 0;
  141                 ia->ia_ndrq = 0;
  142         }
  143         return (rv);
  144 }
  145 
  146 int
  147 rtfpsprint(aux, pnp)
  148         void *aux;
  149         const char *pnp;
  150 {
  151         struct commulti_attach_args *ca = aux;
  152 
  153         if (pnp)
  154                 aprint_normal("com at %s", pnp);
  155         aprint_normal(" slave %d", ca->ca_slave);
  156         return (UNCONF);
  157 }
  158 
  159 void
  160 rtfpsattach(parent, self, aux)
  161         struct device *parent, *self;
  162         void *aux;
  163 {
  164         struct rtfps_softc *sc = (void *)self;
  165         struct isa_attach_args *ia = aux;
  166         struct commulti_attach_args ca;
  167         static int irqport[] = {
  168                 ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT,
  169                 ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT,
  170                 ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT,
  171                 0x2f2,              0x6f2,              0x6f3,
  172                 ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT,
  173                 ISACF_PORT_DEFAULT
  174         };
  175         bus_space_tag_t iot = ia->ia_iot;
  176         int i, iobase, irq;
  177 
  178         printf("\n");
  179 
  180         sc->sc_iot = ia->ia_iot;
  181         sc->sc_iobase = ia->ia_io[0].ir_addr;
  182         irq = ia->ia_irq[0].ir_irq;
  183 
  184         if (irq >= 16 || irqport[irq] == ISACF_PORT_DEFAULT) {
  185                 printf("%s: invalid irq\n", sc->sc_dev.dv_xname);
  186                 return;
  187         }
  188         sc->sc_irqport = irqport[irq];
  189 
  190         for (i = 0; i < NSLAVES; i++) {
  191                 iobase = sc->sc_iobase + i * COM_NPORTS;
  192                 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) &&
  193                     bus_space_map(iot, iobase, COM_NPORTS, 0,
  194                         &sc->sc_slaveioh[i])) {
  195                         printf("%s: can't map i/o space for slave %d\n",
  196                             sc->sc_dev.dv_xname, i);
  197                         return;
  198                 }
  199         }
  200         if (bus_space_map(iot, sc->sc_irqport, 1, 0, &sc->sc_irqioh)) {
  201                 printf("%s: can't map irq port at 0x%x\n", sc->sc_dev.dv_xname,
  202                     sc->sc_irqport);
  203                 return;
  204         }
  205 
  206         bus_space_write_1(iot, sc->sc_irqioh, 0, 0);
  207 
  208         for (i = 0; i < NSLAVES; i++) {
  209                 ca.ca_slave = i;
  210                 ca.ca_iot = sc->sc_iot;
  211                 ca.ca_ioh = sc->sc_slaveioh[i];
  212                 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS;
  213                 ca.ca_noien = 0;
  214 
  215                 sc->sc_slaves[i] = config_found(self, &ca, rtfpsprint);
  216                 if (sc->sc_slaves[i] != NULL)
  217                         sc->sc_alive |= 1 << i;
  218         }
  219 
  220         sc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE,
  221             IPL_SERIAL, rtfpsintr, sc);
  222 }
  223 
  224 int
  225 rtfpsintr(arg)
  226         void *arg;
  227 {
  228         struct rtfps_softc *sc = arg;
  229         bus_space_tag_t iot = sc->sc_iot;
  230         int alive = sc->sc_alive;
  231 
  232         bus_space_write_1(iot, sc->sc_irqioh, 0, 0);
  233 
  234 #define TRY(n) \
  235         if (alive & (1 << (n))) \
  236                 comintr(sc->sc_slaves[n]);
  237         TRY(0);
  238         TRY(1);
  239         TRY(2);
  240         TRY(3);
  241 #undef TRY
  242 
  243         return (1);
  244 }

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

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