sys/arch/acorn32/mainbus/com_pioc.c

   1 /*      $NetBSD: com_pioc.c,v 1.13 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/param.h>
  64
  65 __KERNEL_RCSID(0, "$NetBSD: com_pioc.c,v 1.13 2008/03/14 15:09:09 cube Exp $");
  66
  67 #include <sys/systm.h>
  68 #include <sys/tty.h>
  69 #include <sys/proc.h>
  70 #include <sys/conf.h>
  71 #include <sys/kernel.h>
  72 #include <sys/device.h>
  73
  74 #include <machine/intr.h>
  75 #include <machine/bus.h>
  76 #include <machine/io.h>
  77
  78 #include <acorn32/mainbus/piocvar.h>
  79 #include <dev/ic/comreg.h>
  80 #include <dev/ic/comvar.h>
  81
  82 #include <dev/cons.h>
  83
  84 #include "locators.h"
  85
  86 struct com_pioc_softc {
  87         struct  com_softc sc_com;       /* real "com" softc */
  88         void    *sc_ih;                 /* interrupt handler */
  89 };
  90
  91 /* Prototypes for functions */
  92
  93 cons_decl(com);
  94
  95 static int  com_pioc_probe   (device_t, cfdata_t , void *);
  96 static void com_pioc_attach  (device_t, device_t, void *);
  97
  98 /* device attach structure */
  99
 100 CFATTACH_DECL_NEW(com_pioc, sizeof(struct com_pioc_softc),
 101     com_pioc_probe, com_pioc_attach, NULL, NULL);
 102
 103 extern bus_space_tag_t comconstag;      /* From pioc.c */
 104
 105 /*
 106  * int com_pioc_probe(struct device *parent, struct cfdata *cf, void *aux)
 107  *
 108  * Make sure we are trying to attach a com device and then
 109  * probe for one.
 110  */
 111
 112 static int
 113 com_pioc_probe(device_t parent, cfdata_t cf, void *aux)
 114 {
 115         bus_space_tag_t iot;
 116         bus_space_handle_t ioh;
 117         int iobase;
 118         int rv = 1;
 119         struct pioc_attach_args *pa = aux;
 120
 121         /* We need an offset */
 122         if (pa->pa_offset == PIOCCF_OFFSET_DEFAULT)
 123                 return(0);
 124
 125         iot = pa->pa_iot;
 126         iobase = pa->pa_iobase + pa->pa_offset;
 127
 128         /* if it's in use as console, it's there. */
 129         if (!com_is_console(iot, iobase, 0)) {
 130                 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
 131                         return 0;
 132                 }
 133                 rv = comprobe1(iot, ioh);
 134                 bus_space_unmap(iot, ioh, COM_NPORTS);
 135         }
 136
 137         if (rv) {
 138                 pa->pa_iosize = COM_NPORTS;
 139         }
 140         return (rv);
 141 }
 142
 143 /*
 144  * void com_pioc_attach(struct device *parent, struct device *self, void *aux)
 145  *
 146  * attach the com device
 147  */
 148
 149 static void
 150 com_pioc_attach(device_t parent, device_t self, void *aux)
 151 {
 152         struct com_pioc_softc *psc = device_private(self);
 153         struct com_softc *sc = &psc->sc_com;
 154         u_int iobase;
 155         bus_space_tag_t iot;
 156         bus_space_handle_t ioh;
 157         struct pioc_attach_args *pa = aux;
 158         int count;
 159
 160         sc->sc_dev = self;
 161         iot = pa->pa_iot;
 162         iobase = pa->pa_iobase + pa->pa_offset;
 163
 164 /*
 165         printf(" (iot = %p, iobase = 0x%08x) ", iot, iobase);
 166 */
 167         if (!com_is_console(iot, iobase, &ioh)
 168             && bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh))
 169                 panic("comattach: io mapping failed");
 170         COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase);
 171
 172         sc->sc_frequency = COM_FREQ;
 173
 174         com_attach_subr(sc);
 175
 176         if (pa->pa_irq != MAINBUSCF_IRQ_DEFAULT) {
 177                 psc->sc_ih = intr_claim(pa->pa_irq, IPL_SERIAL, "com",
 178                     comintr, sc);
 179         }
 180
 181         if (!pmf_device_register1(self, com_suspend, com_resume, com_cleanup)) {
 182                 aprint_error_dev(self,
 183                     "could not establish shutdown hook");
 184         }
 185
 186         /*
 187          * This is a patch for bugged revision 1-4 SMC FDC37C665
 188          * I/O controllers.
 189          * If there is RX data pending when the FIFO in turned on
 190          * the RX register cannot be emptied.
 191          *
 192          * Solution:
 193          *   Make sure FIFO is off.
 194          *   Read pending data / int status etc.
 195          */
 196         bus_space_write_1(iot, ioh, com_fifo, 0);
 197         for (count = 0; count < 8; ++count)
 198                 (void)bus_space_read_1(iot, ioh, count);
 199
 200 }
 201
 202 /*
 203  * Console attachment functions
 204  */
 205
 206 void
 207 comcnprobe(struct consdev *cp)
 208 {
 209
 210 #ifdef  COMCONSOLE
 211         cp->cn_pri = CN_REMOTE; /* Force a serial port console */
 212 #else
 213         cp->cn_pri = CN_NORMAL;
 214 #endif
 215 }
 216
 217 void
 218 comcninit(struct consdev *cp)
 219 {
 220         int result;
 221
 222 #ifndef CONMODE
 223 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
 224 #endif
 225 #ifndef CONSPEED
 226 #define CONSPEED 38400
 227 #endif
 228 #ifndef CONADDR
 229 #define CONADDR 0x3f8
 230 #endif
 231
 232         result = comcnattach(comconstag, (IO_CONF_BASE + CONADDR), CONSPEED,
 233             COM_FREQ, COM_TYPE_NORMAL, CONMODE);
 234         if (result) {
 235                 printf("initialising serial; got errornr %d\n", result);
 236                 panic("can't init serial console @%x", CONADDR);
 237         };
 238 }
 239
 240
 241 /* End of com_pioc.c */