sys/arch/sparc/dev/com_obio.c

   1 /*      $NetBSD: com_obio.c,v 1.22 2008/04/28 20:23:35 martin Exp $     */
   2
   3 /*-
   4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Charles M. Hannum.
   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  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*-
  33  * Copyright (c) 1991 The Regents of the University of California.
  34  * All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  * 3. Neither the name of the University nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  *
  60  *      @(#)com.c       7.5 (Berkeley) 5/16/91
  61  */
  62
  63 #include <sys/cdefs.h>
  64 __KERNEL_RCSID(0, "$NetBSD: com_obio.c,v 1.22 2008/04/28 20:23:35 martin Exp $");
  65
  66 #include <sys/param.h>
  67 #include <sys/systm.h>
  68 #include <sys/ioctl.h>
  69 #include <sys/select.h>
  70 #include <sys/tty.h>
  71 #include <sys/proc.h>
  72 #include <sys/conf.h>
  73 #include <sys/file.h>
  74 #include <sys/uio.h>
  75 #include <sys/kernel.h>
  76 #include <sys/syslog.h>
  77 #include <sys/types.h>
  78 #include <sys/device.h>
  79 #include <sys/termios.h>
  80
  81 #include <machine/bus.h>
  82 #include <machine/autoconf.h>
  83 #include <machine/intr.h>
  84
  85 #include <dev/ic/comreg.h>
  86 #include <dev/ic/comvar.h>
  87
  88 #include <sparc/sparc/auxreg.h>
  89
  90 struct com_obio_softc {
  91         struct com_softc osc_com;       /* real "com" softc */
  92
  93         int osc_tadpole;                /* is this on a tadpole */
  94         /* OBIO-specific goo. */
  95         struct evcnt osc_intrcnt;       /* interrupt counting */
  96 };
  97
  98 static int com_obio_match(device_t, cfdata_t , void *);
  99 static void com_obio_attach(device_t, device_t, void *);
 100
 101 CFATTACH_DECL_NEW(com_obio, sizeof(struct com_obio_softc),
 102     com_obio_match, com_obio_attach, NULL, NULL);
 103
 104 static int
 105 com_obio_match(device_t parent, cfdata_t cf, void *aux)
 106 {
 107         union obio_attach_args *uoba = aux;
 108         struct sbus_attach_args *sa = &uoba->uoba_sbus;
 109         int tadpole = 0;
 110         int need_probe = 0;
 111         int rv = 0;
 112         uint8_t auxregval = 0;
 113
 114         if (uoba->uoba_isobio4 != 0) {
 115                 return (0);
 116         }
 117
 118         /*
 119          * Tadpole 3GX/3GS uses "modem" for a 16450 port
 120          * (We need to enable it before probing)
 121          */
 122         if (strcmp("modem", sa->sa_name) == 0) {
 123                 auxregval = *AUXIO4M_REG;
 124                 *AUXIO4M_REG = auxregval | (AUXIO4M_LED|AUXIO4M_LTE);
 125                 DELAY(100);
 126                 tadpole = 1;
 127                 need_probe = 1;
 128         }
 129
 130         /*
 131          * Sun JavaStation 1 uses "su" for a 16550 port
 132          */
 133         if (strcmp("su", sa->sa_name) == 0) {
 134                 need_probe = 1;
 135         }
 136
 137         if (need_probe) {
 138                 bus_space_handle_t ioh;
 139
 140                 if (sbus_bus_map(sa->sa_bustag,
 141                                  sa->sa_slot, sa->sa_offset, sa->sa_size,
 142                                  BUS_SPACE_MAP_LINEAR, &ioh) == 0) {
 143                         rv = comprobe1(sa->sa_bustag, ioh);
 144 #if 0
 145                         printf("modem: probe: lcr=0x%02x iir=0x%02x\n",
 146                                 bus_space_read_1(sa->sa_bustag, ioh, 3),
 147                                 bus_space_read_1(sa->sa_bustag, ioh, 2));
 148 #endif
 149                         bus_space_unmap(sa->sa_bustag, ioh, sa->sa_size);
 150                 }
 151         }
 152
 153         /* Disable the com port if tadpole */
 154         if (tadpole)
 155                 *AUXIO4M_REG = auxregval;
 156
 157         return (rv);
 158 }
 159
 160 static void
 161 com_obio_attach(device_t parent, device_t self, void *aux)
 162 {
 163         struct com_obio_softc *osc = device_private(self);
 164         struct com_softc *sc = &osc->osc_com;
 165         union obio_attach_args *uoba = aux;
 166         struct sbus_attach_args *sa = &uoba->uoba_sbus;
 167         bus_space_handle_t ioh;
 168         bus_space_tag_t iot;
 169         bus_addr_t iobase;
 170
 171         sc->sc_dev = self;
 172
 173         if (strcmp("modem", sa->sa_name) == 0) {
 174                 osc->osc_tadpole = 1;
 175         }
 176
 177         /*
 178          * We're living on an obio that looks like an sbus slot.
 179          */
 180         iot = sa->sa_bustag;
 181         iobase = sa->sa_offset;
 182         sc->sc_frequency = COM_FREQ;
 183
 184         /*
 185          * XXX: It would be nice to be able to split console input and
 186          * output to different devices.  For now switch to serial
 187          * console if PROM stdin is on serial (so that we can use DDB).
 188          */
 189         if (prom_instance_to_package(prom_stdin()) == sa->sa_node)
 190                 comcnattach(iot, iobase, B9600, sc->sc_frequency,
 191                     COM_TYPE_NORMAL, (CLOCAL | CREAD | CS8));
 192
 193         if (!com_is_console(iot, iobase, &ioh) &&
 194             sbus_bus_map(iot, sa->sa_slot, iobase, sa->sa_size,
 195                          BUS_SPACE_MAP_LINEAR, &ioh) != 0) {
 196                 aprint_error(": can't map registers\n");
 197                 return;
 198         }
 199
 200         COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase);
 201
 202         if (osc->osc_tadpole) {
 203                 *AUXIO4M_REG |= (AUXIO4M_LED|AUXIO4M_LTE);
 204                 do {
 205                         DELAY(100);
 206                 } while (!com_probe_subr(&sc->sc_regs));
 207 #if 0
 208                 printf("modem: attach: lcr=0x%02x iir=0x%02x\n",
 209                         bus_space_read_1(sc->sc_regs.iot, sc->sc_regs.ioh, 3),
 210                         bus_space_read_1(sc->sc_regs.iot, sc->sc_regs.ioh, 2));
 211 #endif
 212         }
 213
 214         com_attach_subr(sc);
 215
 216         if (sa->sa_nintr != 0) {
 217                 (void)bus_intr_establish(sc->sc_regs.cr_iot, sa->sa_pri,
 218                     IPL_SERIAL, comintr, sc);
 219                 evcnt_attach_dynamic(&osc->osc_intrcnt, EVCNT_TYPE_INTR, NULL,
 220                     device_xname(self), "intr");
 221         }
 222
 223         if (!pmf_device_register1(self, com_suspend, com_resume, com_cleanup)) {
 224                 aprint_error_dev(self, "could not establish shutdown hook");
 225         }
 226 }