sys/dev/isa/boca.c

   1 /*      $NetBSD: boca.c,v 1.52 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, and information provided by David Muir Sharnoff.
   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: boca.c,v 1.52 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 #include <sys/kernel.h>
  44 #include <sys/callout.h>
  45
  46 #include <sys/bus.h>
  47 #include <sys/intr.h>
  48
  49 #include <dev/ic/comreg.h>
  50 #include <dev/ic/comvar.h>
  51
  52 #include <dev/isa/isavar.h>
  53 #include <dev/isa/com_multi.h>
  54
  55 #define NSLAVES 8
  56
  57 struct boca_softc {
  58         struct device sc_dev;
  59         void *sc_ih;
  60
  61         bus_space_tag_t sc_iot;
  62         int sc_iobase;
  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         callout_t fixup;
  68 };
  69
  70 int bocaprobe(device_t, cfdata_t, void *);
  71 void bocaattach(device_t, device_t, void *);
  72 int bocaintr(void *);
  73 void boca_fixup(void *);
  74
  75 CFATTACH_DECL(boca, sizeof(struct boca_softc),
  76     bocaprobe, bocaattach, NULL, NULL);
  77
  78 int
  79 bocaprobe(device_t parent, cfdata_t self, void *aux)
  80 {
  81         struct isa_attach_args *ia = aux;
  82         bus_space_tag_t iot = ia->ia_iot;
  83         bus_space_handle_t ioh;
  84         int i, iobase, rv = 1;
  85
  86         /*
  87          * Do the normal com probe for the first UART and assume
  88          * its presence, and the ability to map the other UARTS,
  89          * means there is a multiport board there.
  90          * XXX Needs more robustness.
  91          */
  92
  93         if (ia->ia_nio < 1)
  94                 return (0);
  95         if (ia->ia_nirq < 1)
  96                 return (0);
  97
  98         if (ISA_DIRECT_CONFIG(ia))
  99                 return (0);
 100
 101         /* Disallow wildcarded i/o address. */
 102         if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
 103                 return (0);
 104         if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ)
 105                 return (0);
 106
 107         iobase = ia->ia_io[0].ir_addr;
 108
 109         /* if the first port is in use as console, then it. */
 110         if (com_is_console(iot, iobase, 0))
 111                 goto checkmappings;
 112
 113         if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
 114                 rv = 0;
 115                 goto out;
 116         }
 117         rv = comprobe1(iot, ioh);
 118         bus_space_unmap(iot, ioh, COM_NPORTS);
 119         if (rv == 0)
 120                 goto out;
 121
 122 checkmappings:
 123         for (i = 1; i < NSLAVES; i++) {
 124                 iobase += COM_NPORTS;
 125
 126                 if (com_is_console(iot, iobase, 0))
 127                         continue;
 128
 129                 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
 130                         rv = 0;
 131                         goto out;
 132                 }
 133                 bus_space_unmap(iot, ioh, COM_NPORTS);
 134         }
 135
 136 out:
 137         if (rv) {
 138                 ia->ia_nio = 1;
 139                 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS;
 140
 141                 ia->ia_nirq = 1;
 142
 143                 ia->ia_niomem = 0;
 144                 ia->ia_ndrq = 0;
 145         }
 146         return (rv);
 147 }
 148
 149 void
 150 bocaattach(device_t parent, device_t self, void *aux)
 151 {
 152         struct boca_softc *sc = (void *)self;
 153         struct isa_attach_args *ia = aux;
 154         struct commulti_attach_args ca;
 155         bus_space_tag_t iot = ia->ia_iot;
 156         int i, iobase;
 157
 158         printf("\n");
 159
 160         sc->sc_iot = ia->ia_iot;
 161         sc->sc_iobase = ia->ia_io[0].ir_addr;
 162
 163         for (i = 0; i < NSLAVES; i++) {
 164                 iobase = sc->sc_iobase + i * COM_NPORTS;
 165                 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) &&
 166                     bus_space_map(iot, iobase, COM_NPORTS, 0,
 167                         &sc->sc_slaveioh[i])) {
 168                         aprint_error_dev(&sc->sc_dev, "can't map i/o space for slave %d\n", i);
 169                         return;
 170                 }
 171         }
 172
 173         for (i = 0; i < NSLAVES; i++) {
 174
 175                 ca.ca_slave = i;
 176                 ca.ca_iot = sc->sc_iot;
 177                 ca.ca_ioh = sc->sc_slaveioh[i];
 178                 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS;
 179                 ca.ca_noien = 0;
 180
 181                 sc->sc_slaves[i] = config_found(self, &ca, commultiprint);
 182                 if (sc->sc_slaves[i] != NULL)
 183                         sc->sc_alive |= 1 << i;
 184         }
 185
 186         sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq,
 187             IST_EDGE, IPL_SERIAL, bocaintr, sc);
 188         callout_init(&sc->fixup, 0);
 189         callout_reset(&sc->fixup, hz/10, boca_fixup, sc);
 190 }
 191
 192 int
 193 bocaintr(void *arg)
 194 {
 195         struct boca_softc *sc = arg;
 196         bus_space_tag_t iot = sc->sc_iot;
 197         int alive = sc->sc_alive;
 198         int bits;
 199
 200         bits = bus_space_read_1(iot, sc->sc_slaveioh[0], com_scratch) & alive;
 201         if (bits == 0)
 202                 return (0);
 203
 204         for (;;) {
 205 #define TRY(n) \
 206                 if (bits & (1 << (n))) { \
 207                         if (comintr(sc->sc_slaves[n]) == 0) { \
 208                                 printf("%s: bogus intr for port %d\n", \
 209                                     device_xname(&sc->sc_dev), n); \
 210                         } \
 211                 }
 212                 TRY(0);
 213                 TRY(1);
 214                 TRY(2);
 215                 TRY(3);
 216                 TRY(4);
 217                 TRY(5);
 218                 TRY(6);
 219                 TRY(7);
 220 #undef TRY
 221                 bits = bus_space_read_1(iot, sc->sc_slaveioh[0],
 222                     com_scratch) & alive;
 223                 if (bits == 0) {
 224                         return (1);
 225                 }
 226         }
 227 }
 228
 229 void
 230 boca_fixup(void *v)
 231 {
 232         struct boca_softc *sc = v;
 233         int alive = sc->sc_alive;
 234         int i, s;
 235
 236         s = splserial();
 237
 238         for (i = 0; i < 8; i++) {
 239                 if (alive & (1 << (i)))
 240                         comintr(sc->sc_slaves[i]);
 241         }
 242         callout_reset(&sc->fixup, hz/10, boca_fixup, sc);
 243         splx(s);
 244 }