sys/arch/hp300/dev/com_dio.c

   1 /*      $NetBSD: com_dio.c,v 1.7 2008/03/14 15:09:09 cube 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_dio.c,v 1.7 2008/03/14 15:09:09 cube Exp $");
  65
  66 #include <sys/param.h>
  67 #include <sys/systm.h>
  68 #include <sys/device.h>
  69 #include <sys/termios.h>
  70 #include <sys/ttydefaults.h>
  71
  72 #include <machine/bus.h>
  73
  74 #include <dev/ic/comreg.h>
  75 #include <dev/ic/comvar.h>
  76
  77 #include <hp300/dev/diovar.h>
  78 #include <hp300/dev/diodevs.h>
  79 #include <hp300/dev/com_dioreg.h>
  80 #include <hp300/dev/com_diovar.h>
  81
  82 struct com_dio_softc {
  83         struct  com_softc sc_com;       /* real "com" softc */
  84
  85         /* DIO-specific goo. */
  86         struct  bus_space_tag sc_tag;   /* device specific bus space tag */
  87         void    *sc_ih;                 /* interrupt handler */
  88 };
  89
  90 static int      com_dio_match(device_t, cfdata_t , void *);
  91 static void     com_dio_attach(device_t, device_t, void *);
  92
  93 CFATTACH_DECL_NEW(com_dio, sizeof(struct com_dio_softc),
  94     com_dio_match, com_dio_attach, NULL, NULL);
  95
  96 static int com_dio_speed = TTYDEF_SPEED;
  97 static struct bus_space_tag comcntag;
  98
  99 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
 100
 101 static int
 102 com_dio_match(device_t parent, cfdata_t match, void *aux)
 103 {
 104         struct dio_attach_args *da = aux;
 105
 106         switch (da->da_id) {
 107         case DIO_DEVICE_ID_DCA0:
 108         case DIO_DEVICE_ID_DCA0REM:
 109         case DIO_DEVICE_ID_DCA1:
 110         case DIO_DEVICE_ID_DCA1REM:
 111                 return 1;
 112         }
 113
 114         return 0;
 115 }
 116
 117 static void
 118 com_dio_attach(device_t parent, device_t self, void *aux)
 119 {
 120         struct com_dio_softc *dsc = device_private(self);
 121         struct com_softc *sc = &dsc->sc_com;
 122         bus_space_tag_t iot;
 123         bus_space_handle_t iohdca, iohcom;
 124         struct dio_attach_args *da = aux;
 125         int isconsole;
 126
 127         sc->sc_dev = self;
 128         isconsole = com_is_console(&comcntag, da->da_addr + DCA_COM_OFFSET,
 129             &iohcom);
 130
 131         if (isconsole) {
 132                 iot = &comcntag;
 133                 bus_space_unmap(iot, iohcom, COM_NPORTS);
 134         } else {
 135                 iot = &dsc->sc_tag;
 136                 memcpy(iot, da->da_bst, sizeof(struct bus_space_tag));
 137                 dio_set_bus_space_oddbyte(iot);
 138         }
 139
 140         if (bus_space_map(iot, da->da_addr, DCA_SIZE, 0, &iohdca) ||
 141             bus_space_subregion(iot, iohdca, DCA_COM_OFFSET,
 142             COM_NPORTS << 1, &iohcom)) {
 143                 aprint_error(": can't map i/o space\n");
 144                 return;
 145         }
 146
 147         if (!isconsole) {
 148                 bus_space_write_1(iot, iohdca, DCA_RESET, 0xff);
 149                 DELAY(1000);
 150         }
 151
 152         COM_INIT_REGS(sc->sc_regs, iot, iohcom,
 153             da->da_addr + DCA_COM_OFFSET);
 154
 155         sc->sc_frequency = COM_DIO_FREQ;
 156
 157         com_attach_subr(sc);
 158
 159         dsc->sc_ih = dio_intr_establish(comintr, sc, da->da_ipl, IPL_VM);
 160
 161         /* Enable interrupts. */
 162         bus_space_write_1(iot, iohdca, DCA_IC, IC_IE);
 163 }
 164
 165 int
 166 com_dio_cnattach(bus_space_tag_t bst, bus_addr_t addr, int scode)
 167 {
 168         bus_space_tag_t iot = &comcntag;
 169         bus_space_handle_t iohdca;
 170         uint8_t id;
 171
 172         memcpy(iot, bst, sizeof(struct bus_space_tag));
 173         dio_set_bus_space_oddbyte(iot);
 174
 175         if (bus_space_map(iot, addr, DCA_SIZE, 0, &iohdca))
 176                 return 1;
 177         bus_space_write_1(iot, iohdca, DCA_RESET, 0xff);
 178         DELAY(100);
 179         bus_space_write_1(iot, iohdca, DCA_IC, IC_IE);
 180
 181         id = bus_space_read_1(iot, iohdca, DCA_ID);
 182         bus_space_unmap(iot, iohdca, DCA_SIZE);
 183
 184         switch (id) {
 185 #ifdef CONSCODE
 186         case DCAID0:
 187         case DCAID1:
 188 #endif
 189         case DCAREMID0:
 190         case DCAREMID1:
 191                 break;
 192         default:
 193                 return 1;
 194         }
 195
 196         comcnattach(iot, addr + DCA_COM_OFFSET, com_dio_speed, COM_DIO_FREQ,
 197             COM_TYPE_NORMAL, CONMODE);
 198
 199         return 0;
 200 }