sys/dev/isa/com_isa.c

   1 /*      $NetBSD: com_isa.c,v 1.37 2009/11/23 02:13:46 rmind 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_isa.c,v 1.37 2009/11/23 02:13:46 rmind 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/file.h>
  73 #include <sys/uio.h>
  74 #include <sys/kernel.h>
  75 #include <sys/syslog.h>
  76 #include <sys/device.h>
  77
  78 #include <sys/intr.h>
  79 #include <sys/bus.h>
  80
  81 #include <dev/ic/comreg.h>
  82 #include <dev/ic/comvar.h>
  83 #ifdef COM_HAYESP
  84 #include <dev/ic/hayespreg.h>
  85 #endif
  86
  87 #include <dev/isa/isavar.h>
  88
  89 struct com_isa_softc {
  90         struct  com_softc sc_com;       /* real "com" softc */
  91
  92         /* ISA-specific goo. */
  93         isa_chipset_tag_t sc_ic;
  94         void    *sc_ih;                 /* interrupt handler */
  95         int     sc_irq;
  96 };
  97
  98 static bool com_isa_suspend(device_t, pmf_qual_t);
  99 static bool com_isa_resume(device_t, pmf_qual_t);
 100
 101 int com_isa_probe(device_t, cfdata_t , void *);
 102 void com_isa_attach(device_t, device_t, void *);
 103 static int com_isa_detach(device_t, int);
 104 #ifdef COM_HAYESP
 105 int com_isa_isHAYESP(bus_space_handle_t, struct com_softc *);
 106 #endif
 107
 108
 109 CFATTACH_DECL3_NEW(com_isa, sizeof(struct com_isa_softc),
 110     com_isa_probe, com_isa_attach, com_isa_detach, NULL,
 111     NULL, NULL, DVF_DETACH_SHUTDOWN);
 112
 113 int
 114 com_isa_probe(device_t parent, cfdata_t match, void *aux)
 115 {
 116         bus_space_tag_t iot;
 117         bus_space_handle_t ioh;
 118         int iobase;
 119         int rv = 1;
 120         struct isa_attach_args *ia = aux;
 121
 122         if (ia->ia_nio < 1)
 123                 return (0);
 124         if (ia->ia_nirq < 1)
 125                 return (0);
 126
 127         if (ISA_DIRECT_CONFIG(ia))
 128                 return (0);
 129
 130         /* Disallow wildcarded i/o address. */
 131         if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
 132                 return (0);
 133
 134         /* Don't allow wildcarded IRQ. */
 135         if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ)
 136                 return (0);
 137
 138         iot = ia->ia_iot;
 139         iobase = ia->ia_io[0].ir_addr;
 140
 141         /* if it's in use as console, it's there. */
 142         if (!com_is_console(iot, iobase, 0)) {
 143                 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
 144                         return 0;
 145                 }
 146                 rv = comprobe1(iot, ioh);
 147                 bus_space_unmap(iot, ioh, COM_NPORTS);
 148         }
 149
 150         if (rv) {
 151                 ia->ia_nio = 1;
 152                 ia->ia_io[0].ir_size = COM_NPORTS;
 153
 154                 ia->ia_nirq = 1;
 155
 156                 ia->ia_niomem = 0;
 157                 ia->ia_ndrq = 0;
 158         }
 159         return (rv);
 160 }
 161
 162 void
 163 com_isa_attach(device_t parent, device_t self, void *aux)
 164 {
 165         struct com_isa_softc *isc = device_private(self);
 166         struct com_softc *sc = &isc->sc_com;
 167         int iobase, irq;
 168         bus_space_tag_t iot;
 169         bus_space_handle_t ioh;
 170         struct isa_attach_args *ia = aux;
 171 #ifdef COM_HAYESP
 172         int     hayesp_ports[] = { 0x140, 0x180, 0x280, 0x300, 0 };
 173         int     *hayespp;
 174 #endif
 175
 176         /*
 177          * We're living on an isa.
 178          */
 179         iobase = ia->ia_io[0].ir_addr;
 180         iot = ia->ia_iot;
 181
 182         if (!com_is_console(iot, iobase, &ioh) &&
 183             bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
 184                 printf(": can't map i/o space\n");
 185                 return;
 186         }
 187
 188         sc->sc_dev = self;
 189
 190         COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase);
 191
 192         sc->sc_frequency = COM_FREQ;
 193         irq = ia->ia_irq[0].ir_irq;
 194
 195 #ifdef COM_HAYESP
 196         for (hayespp = hayesp_ports; *hayespp != 0; hayespp++) {
 197                 bus_space_handle_t      hayespioh;
 198 #define HAYESP_NPORTS   8
 199                 if (bus_space_map(iot, *hayespp, HAYESP_NPORTS, 0, &hayespioh))
 200                         continue;
 201                 if (com_isa_isHAYESP(hayespioh, sc)) {
 202                         break;
 203                 }
 204                 bus_space_unmap(iot, hayespioh, HAYESP_NPORTS);
 205         }
 206 #endif
 207
 208         com_attach_subr(sc);
 209
 210         if (!pmf_device_register1(self, com_isa_suspend, com_isa_resume,
 211             com_cleanup))
 212                 aprint_error_dev(self, "couldn't establish power handler\n");
 213
 214         isc->sc_ic = ia->ia_ic;
 215         isc->sc_irq = irq;
 216         isc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE, IPL_SERIAL,
 217             comintr, sc);
 218 }
 219
 220 static bool
 221 com_isa_suspend(device_t self, pmf_qual_t qual)
 222 {
 223         struct com_isa_softc *isc = device_private(self);
 224
 225         if (!com_suspend(self, qual))
 226                 return false;
 227
 228         isa_intr_disestablish(isc->sc_ic, isc->sc_ih);
 229         isc->sc_ih = NULL;
 230
 231         return true;
 232 }
 233
 234 static bool
 235 com_isa_resume(device_t self, pmf_qual_t qual)
 236 {
 237         struct com_isa_softc *isc = device_private(self);
 238         struct com_softc *sc = &isc->sc_com;
 239
 240         isc->sc_ih = isa_intr_establish(isc->sc_ic, isc->sc_irq, IST_EDGE,
 241             IPL_SERIAL, comintr, sc);
 242
 243         return com_resume(self, qual);
 244 }
 245
 246 static int
 247 com_isa_detach(device_t self, int flags)
 248 {
 249         struct com_isa_softc *isc = device_private(self);
 250         struct com_softc *sc = &isc->sc_com;
 251         const struct com_regs *cr = &sc->sc_regs;
 252         int rc;
 253
 254         if ((rc = com_detach(self, flags)) != 0)
 255                 return rc;
 256
 257         if (isc->sc_ih != NULL)
 258                 isa_intr_disestablish(isc->sc_ic, isc->sc_ih);
 259
 260         pmf_device_deregister(self);
 261
 262         com_cleanup(self, 0);
 263
 264 #ifdef COM_HAYESP
 265         if (sc->sc_type == COM_TYPE_HAYESP)
 266                 bus_space_unmap(cr->cr_iot, sc->sc_hayespioh, HAYESP_NPORTS);
 267 #endif
 268         bus_space_unmap(cr->cr_iot, cr->cr_ioh, COM_NPORTS);
 269
 270         return 0;
 271 }
 272
 273 #ifdef COM_HAYESP
 274 int
 275 com_isa_isHAYESP(bus_space_handle_t hayespioh, struct com_softc *sc)
 276 {
 277         char    val, dips;
 278         int     combaselist[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
 279         bus_space_tag_t iot = sc->sc_regs.cr_iot;
 280
 281         /*
 282          * Hayes ESP cards have two iobases.  One is for compatibility with
 283          * 16550 serial chips, and at the same ISA PC base addresses.  The
 284          * other is for ESP-specific enhanced features, and lies at a
 285          * different addressing range entirely (0x140, 0x180, 0x280, or 0x300).
 286          */
 287
 288         /* Test for ESP signature */
 289         if ((bus_space_read_1(iot, hayespioh, 0) & 0xf3) == 0)
 290                 return (0);
 291
 292         /*
 293          * ESP is present at ESP enhanced base address; unknown com port
 294          */
 295
 296         /* Get the dip-switch configurations */
 297         bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_GETDIPS);
 298         dips = bus_space_read_1(iot, hayespioh, HAYESP_STATUS1);
 299
 300         /* Determine which com port this ESP card services: bits 0,1 of  */
 301         /*  dips is the port # (0-3); combaselist[val] is the com_iobase */
 302         if (sc->sc_regs.cr_iobase != combaselist[dips & 0x03])
 303                 return (0);
 304
 305         printf(": ESP");
 306
 307         /* Check ESP Self Test bits. */
 308         /* Check for ESP version 2.0: bits 4,5,6 == 010 */
 309         bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_GETTEST);
 310         val = bus_space_read_1(iot, hayespioh, HAYESP_STATUS1); /* Clear reg1 */
 311         val = bus_space_read_1(iot, hayespioh, HAYESP_STATUS2);
 312         if ((val & 0x70) < 0x20) {
 313                 printf("-old (%o)", val & 0x70);
 314                 /* we do not support the necessary features */
 315                 return (0);
 316         }
 317
 318         /* Check for ability to emulate 16550: bit 8 == 1 */
 319         if ((dips & 0x80) == 0) {
 320                 printf(" slave");
 321                 /* XXX Does slave really mean no 16550 support?? */
 322                 return (0);
 323         }
 324
 325         /*
 326          * If we made it this far, we are a full-featured ESP v2.0 (or
 327          * better), at the correct com port address.
 328          */
 329         sc->sc_type = COM_TYPE_HAYESP;
 330         sc->sc_hayespioh = hayespioh;
 331         sc->sc_fifolen = 1024;
 332         sc->sc_prescaler = 0;                   /* set prescaler to x1. */
 333         printf(", 1024 byte fifo\n");
 334         return (1);
 335 }
 336 #endif