sys/dev/isa/rtfps.c

   1 /*      $NetBSD: rtfps.c,v 1.56 2009/05/12 08:44:19 cegger 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 1.56 2009/05/12 08:44:19 cegger 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 <sys/bus.h>
  45 #include <sys/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(device_t, cfdata_t, void *);
  70 void rtfpsattach(device_t, device_t, void *);
  71 int rtfpsintr(void *);
  72
  73 CFATTACH_DECL(rtfps, sizeof(struct rtfps_softc),
  74     rtfpsprobe, rtfpsattach, NULL, NULL);
  75
  76 int
  77 rtfpsprobe(device_t parent, cfdata_t self, void *aux)
  78 {
  79         struct isa_attach_args *ia = aux;
  80         bus_space_tag_t iot = ia->ia_iot;
  81         bus_space_handle_t ioh;
  82         int i, iobase, rv = 1;
  83
  84         /*
  85          * Do the normal com probe for the first UART and assume
  86          * its presence, and the ability to map the other UARTS,
  87          * means there is a multiport board there.
  88          * XXX Needs more robustness.
  89          */
  90
  91         if (ia->ia_nio < 1)
  92                 return (0);
  93         if (ia->ia_nirq < 1)
  94                 return (0);
  95
  96         /* Disallow wildcarded i/o address. */
  97         if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
  98                 return (0);
  99         if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ)
 100                 return (0);
 101
 102         /* if the first port is in use as console, then it. */
 103         if (com_is_console(iot, ia->ia_io[0].ir_addr, 0))
 104                 goto checkmappings;
 105
 106         if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) {
 107                 rv = 0;
 108                 goto out;
 109         }
 110         rv = comprobe1(iot, ioh);
 111         bus_space_unmap(iot, ioh, COM_NPORTS);
 112         if (rv == 0)
 113                 goto out;
 114
 115 checkmappings:
 116         for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) {
 117                 iobase += COM_NPORTS;
 118
 119                 if (com_is_console(iot, iobase, 0))
 120                         continue;
 121
 122                 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
 123                         rv = 0;
 124                         goto out;
 125                 }
 126                 bus_space_unmap(iot, ioh, COM_NPORTS);
 127         }
 128
 129 out:
 130         if (rv) {
 131                 ia->ia_nio = 1;
 132                 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS;
 133
 134                 ia->ia_nirq = 1;
 135
 136                 ia->ia_niomem = 0;
 137                 ia->ia_ndrq = 0;
 138         }
 139         return (rv);
 140 }
 141
 142 void
 143 rtfpsattach(device_t parent, device_t self, void *aux)
 144 {
 145         struct rtfps_softc *sc = (void *)self;
 146         struct isa_attach_args *ia = aux;
 147         struct commulti_attach_args ca;
 148         static int irqport[] = {
 149                 -1, -1, -1, -1, -1, -1, -1, -1,
 150                 -1, 0x2f2, 0x6f2, 0x6f3, -1, -1, -1, -1
 151         };
 152         bus_space_tag_t iot = ia->ia_iot;
 153         int i, iobase, irq;
 154
 155         printf("\n");
 156
 157         sc->sc_iot = ia->ia_iot;
 158         sc->sc_iobase = ia->ia_io[0].ir_addr;
 159         irq = ia->ia_irq[0].ir_irq;
 160
 161         if (irq >= 16 || irqport[irq] == -1) {
 162                 printf("%s: invalid irq\n", device_xname(&sc->sc_dev));
 163                 return;
 164         }
 165         sc->sc_irqport = irqport[irq];
 166
 167         for (i = 0; i < NSLAVES; i++) {
 168                 iobase = sc->sc_iobase + i * COM_NPORTS;
 169                 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) &&
 170                     bus_space_map(iot, iobase, COM_NPORTS, 0,
 171                         &sc->sc_slaveioh[i])) {
 172                         aprint_error_dev(&sc->sc_dev, "can't map i/o space for slave %d\n", i);
 173                         return;
 174                 }
 175         }
 176         if (bus_space_map(iot, sc->sc_irqport, 1, 0, &sc->sc_irqioh)) {
 177                 aprint_error_dev(&sc->sc_dev, "can't map irq port at 0x%x\n",
 178                     sc->sc_irqport);
 179                 return;
 180         }
 181
 182         bus_space_write_1(iot, sc->sc_irqioh, 0, 0);
 183
 184         for (i = 0; i < NSLAVES; i++) {
 185                 ca.ca_slave = i;
 186                 ca.ca_iot = sc->sc_iot;
 187                 ca.ca_ioh = sc->sc_slaveioh[i];
 188                 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS;
 189                 ca.ca_noien = 0;
 190
 191                 sc->sc_slaves[i] = config_found(self, &ca, commultiprint);
 192                 if (sc->sc_slaves[i] != NULL)
 193                         sc->sc_alive |= 1 << i;
 194         }
 195
 196         sc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE,
 197             IPL_SERIAL, rtfpsintr, sc);
 198 }
 199
 200 int
 201 rtfpsintr(void *arg)
 202 {
 203         struct rtfps_softc *sc = arg;
 204         bus_space_tag_t iot = sc->sc_iot;
 205         int alive = sc->sc_alive;
 206
 207         bus_space_write_1(iot, sc->sc_irqioh, 0, 0);
 208
 209 #define TRY(n) \
 210         if (alive & (1 << (n))) \
 211                 comintr(sc->sc_slaves[n]);
 212         TRY(0);
 213         TRY(1);
 214         TRY(2);
 215         TRY(3);
 216 #undef TRY
 217
 218         return (1);
 219 }