The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/dev/mca/com_mca.c

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    1 /*      $NetBSD: com_mca.c,v 1.10 2003/08/07 16:31:08 agc Exp $ */
    2 
    3 /*-
    4  * Copyright (c) 2001 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  * 3. All advertising materials mentioning features or use of this software
   19  *    must display the following acknowledgement:
   20  *        This product includes software developed by the NetBSD
   21  *        Foundation, Inc. and its contributors.
   22  * 4. Neither the name of The NetBSD Foundation nor the names of its
   23  *    contributors may be used to endorse or promote products derived
   24  *    from this software without specific prior written permission.
   25  *
   26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   36  * POSSIBILITY OF SUCH DAMAGE.
   37  */
   38 
   39 /*-
   40  * Copyright (c) 1991 The Regents of the University of California.
   41  * All rights reserved.
   42  *
   43  * Redistribution and use in source and binary forms, with or without
   44  * modification, are permitted provided that the following conditions
   45  * are met:
   46  * 1. Redistributions of source code must retain the above copyright
   47  *    notice, this list of conditions and the following disclaimer.
   48  * 2. Redistributions in binary form must reproduce the above copyright
   49  *    notice, this list of conditions and the following disclaimer in the
   50  *    documentation and/or other materials provided with the distribution.
   51  * 3. Neither the name of the University nor the names of its contributors
   52  *    may be used to endorse or promote products derived from this software
   53  *    without specific prior written permission.
   54  *
   55  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   56  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   57  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   58  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   59  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   60  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   61  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   62  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   63  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   64  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   65  * SUCH DAMAGE.
   66  *
   67  *      @(#)com.c       7.5 (Berkeley) 5/16/91
   68  */
   69 
   70 /*
   71  * This driver attaches serial port boards and internal modems.
   72  */
   73 
   74 #include <sys/cdefs.h>
   75 __KERNEL_RCSID(0, "$NetBSD: com_mca.c,v 1.10 2003/08/07 16:31:08 agc Exp $");
   76 
   77 #include <sys/param.h>
   78 #include <sys/systm.h>
   79 #include <sys/ioctl.h>
   80 #include <sys/select.h>
   81 #include <sys/tty.h>
   82 #include <sys/proc.h>
   83 #include <sys/user.h>
   84 #include <sys/file.h>
   85 #include <sys/uio.h>
   86 #include <sys/kernel.h>
   87 #include <sys/syslog.h>
   88 #include <sys/device.h>
   89 
   90 #include <machine/intr.h>
   91 #include <machine/bus.h>
   92 
   93 #include <dev/ic/comreg.h>
   94 #include <dev/ic/comvar.h>
   95 
   96 #include <dev/mca/mcavar.h>
   97 #include <dev/mca/mcadevs.h>
   98 
   99 struct com_mca_softc {
  100         struct  com_softc sc_com;       /* real "com" softc */
  101 
  102         /* MCA-specific goo. */
  103         void    *sc_ih;                 /* interrupt handler */
  104 };
  105 
  106 int com_mca_probe __P((struct device *, struct cfdata *, void *));
  107 void com_mca_attach __P((struct device *, struct device *, void *));
  108 void com_mca_cleanup __P((void *));
  109 
  110 static int ibm_modem_getcfg __P((struct mca_attach_args *, int *, int *));
  111 static int neocom1_getcfg __P((struct mca_attach_args *, int *, int *));
  112 static int ibm_mpcom_getcfg __P((struct mca_attach_args *, int *, int *));
  113 
  114 CFATTACH_DECL(com_mca, sizeof(struct com_mca_softc),
  115     com_mca_probe, com_mca_attach, NULL, NULL);
  116 
  117 static const struct com_mca_product {
  118         u_int32_t       cp_prodid;      /* MCA product ID */
  119         const char      *cp_name;       /* device name */
  120         int (*cp_getcfg) __P((struct mca_attach_args *, int *iobase, int *irq));
  121                                         /* get device i/o base and irq */
  122 } com_mca_products[] = {
  123         { MCA_PRODUCT_IBM_MOD,  "IBM Internal Modem",   ibm_modem_getcfg },
  124         { MCA_PRODUCT_NEOCOM1,  "NeoTecH Single RS-232 Async. Adapter, SM110",
  125                 neocom1_getcfg },
  126         { MCA_PRODUCT_IBM_MPCOM,"IBM Multi-Protocol Communications Adapter",
  127                 ibm_mpcom_getcfg },
  128         { 0,                    NULL,                   NULL },
  129 };
  130 
  131 static const struct com_mca_product *com_mca_lookup __P((int));
  132 
  133 static const struct com_mca_product *
  134 com_mca_lookup(ma_id)
  135         int ma_id;
  136 {
  137         const struct com_mca_product *cpp;
  138 
  139         for (cpp = com_mca_products; cpp->cp_name != NULL; cpp++)
  140                 if (cpp->cp_prodid == ma_id)
  141                         return (cpp);
  142 
  143         return (NULL);
  144 }
  145 
  146 int
  147 com_mca_probe(parent, match, aux)
  148         struct device *parent;
  149         struct cfdata *match;
  150         void *aux;
  151 {
  152         struct mca_attach_args *ma = aux;
  153 
  154         if (com_mca_lookup(ma->ma_id))
  155                 return (1);
  156 
  157         return (0);
  158 }
  159 
  160 void
  161 com_mca_attach(parent, self, aux)
  162         struct device *parent, *self;
  163         void *aux;
  164 {
  165         struct com_mca_softc *isc = (void *)self;
  166         struct com_softc *sc = &isc->sc_com;
  167         int iobase, irq;
  168         struct mca_attach_args *ma = aux;
  169         const struct com_mca_product *cpp;
  170 
  171         cpp = com_mca_lookup(ma->ma_id);
  172 
  173         /* get iobase and irq */
  174         if ((*cpp->cp_getcfg)(ma, &iobase, &irq))
  175                 return;
  176 
  177         if (bus_space_map(ma->ma_iot, iobase, COM_NPORTS, 0, &sc->sc_ioh)) {
  178                 printf(": can't map i/o space\n");
  179                 return;
  180         }
  181 
  182         sc->sc_frequency = COM_FREQ;
  183         sc->sc_iot = ma->ma_iot;
  184         sc->sc_iobase = iobase;
  185 
  186         printf(" slot %d i/o %#x-%#x irq %d", ma->ma_slot + 1,
  187                 iobase, iobase + COM_NPORTS - 1, irq);
  188 
  189         com_attach_subr(sc);
  190 
  191         printf("%s: %s\n", sc->sc_dev.dv_xname, cpp->cp_name);
  192 
  193         isc->sc_ih = mca_intr_establish(ma->ma_mc, irq, IPL_SERIAL,
  194                         comintr, sc);
  195         if (isc->sc_ih == NULL) {
  196                 printf("%s: couldn't establish interrupt handler\n",
  197                     sc->sc_dev.dv_xname);
  198                 return;
  199         }
  200 
  201         /*
  202          * Shutdown hook for buggy BIOSs that don't recognize the UART
  203          * without a disabled FIFO.
  204          * XXX is this necessary on MCA ? --- jdolecek
  205          */
  206         if (shutdownhook_establish(com_mca_cleanup, sc) == NULL)
  207                 panic("com_mca_attach: could not establish shutdown hook");
  208 }
  209 
  210 void
  211 com_mca_cleanup(arg)
  212         void *arg;
  213 {
  214         struct com_softc *sc = arg;
  215 
  216         if (ISSET(sc->sc_hwflags, COM_HW_FIFO))
  217                 bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_fifo, 0);
  218 }
  219 
  220 /* map serial_X to iobase and irq */
  221 static const struct {
  222         int iobase;
  223         int irq;
  224 } MCA_SERIAL[] = {
  225         { 0x03f8,       4 },    /* SERIAL_1 */
  226         { 0x02f8,       3 },    /* SERIAL_2 */
  227         { 0x3220,       3 },    /* SERIAL_3 */
  228         { 0x3228,       3 },    /* SERIAL_4 */
  229         { 0x4220,       3 },    /* SERIAL_5 */
  230         { 0x4228,       3 },    /* SERIAL_6 */
  231         { 0x5220,       3 },    /* SERIAL_7 */
  232         { 0x5228,       3 },    /* SERIAL_8 */
  233 };
  234 
  235 /*
  236  * Get config for IBM Internal Modem (ID 0xEDFF). This beast doesn't
  237  * seem to support even AT commands, it's good as example for adding
  238  * other stuff though.
  239  */
  240 static int
  241 ibm_modem_getcfg(ma, iobasep, irqp)
  242         struct mca_attach_args *ma;
  243         int *iobasep, *irqp;
  244 {
  245         int pos2;
  246         int snum;
  247 
  248         pos2 = mca_conf_read(ma->ma_mc, ma->ma_slot, 2);
  249 
  250         /*
  251          * POS register 2: (adf pos0)
  252          * 7 6 5 4 3 2 1 0
  253          *         \__/  \__ enable: 0=adapter disabled, 1=adapter enabled
  254          *            \_____ Serial Configuration: XX=SERIAL_XX 
  255          */ 
  256         
  257         snum = (pos2 & 0x0e) >> 1;
  258 
  259         *iobasep = MCA_SERIAL[snum].iobase;
  260         *irqp = MCA_SERIAL[snum].irq;
  261 
  262         return (0);
  263 }
  264 
  265 /*
  266  * Get configuration for NeoTecH Single RS-232 Async. Adapter, SM110.
  267  */
  268 static int
  269 neocom1_getcfg(ma, iobasep, irqp)
  270         struct mca_attach_args *ma;
  271         int *iobasep, *irqp;
  272 {
  273         int pos2, pos3, pos4;
  274         static const int neotech_irq[] = { 12, 9, 4, 3 };
  275 
  276         pos2 = mca_conf_read(ma->ma_mc, ma->ma_slot, 2);
  277         pos3 = mca_conf_read(ma->ma_mc, ma->ma_slot, 3);
  278         pos4 = mca_conf_read(ma->ma_mc, ma->ma_slot, 4);
  279 
  280         /*
  281          * POS register 2: (adf pos0)
  282          * 7 6 5 4 3 2 1 0
  283          *     1     \_/ \__ enable: 0=adapter disabled, 1=adapter enabled
  284          *             \____ IRQ: 11=3 10=4 01=9 00=12
  285          *
  286          * POS register 3: (adf pos1)
  287          * 7 6 5 4 3 2 1 0
  288          * \______/
  289          *        \_________ I/O Address: bits 7-3
  290          *
  291          * POS register 4: (adf pos2)
  292          * 7 6 5 4 3 2 1 0
  293          * \_____________/
  294          *               \__ I/O Address: bits 15-8
  295          */ 
  296         
  297         *iobasep = (pos4 << 8) | (pos3 & 0xf8);
  298         *irqp = neotech_irq[(pos2 & 0x06) >> 1];
  299 
  300         return (0);
  301 }
  302 
  303 /*
  304  * Get configuration for IBM Multi-Protocol Communications Adapter.
  305  * We only support SERIAL mode, bail out if set to SDLC or BISYNC.
  306  */
  307 static int
  308 ibm_mpcom_getcfg(ma, iobasep, irqp)
  309         struct mca_attach_args *ma;
  310         int *iobasep, *irqp;
  311 {
  312         int snum, pos2;
  313 
  314         pos2 = mca_conf_read(ma->ma_mc, ma->ma_slot, 2);
  315 
  316         /*
  317          * For SERIAL mode, bit 4 has to be 0.
  318          *
  319          * POS register 2: (adf pos0)
  320          * 7 6 5 4 3 2 1 0
  321          *       0 \__/  \__ enable: 0=adapter disabled, 1=adapter enabled
  322          *            \_____ Serial Configuration: XX=SERIAL_XX 
  323          */ 
  324         
  325         if (pos2 & 0x10) {
  326                 printf(": not set to SERIAL mode, ignored\n");
  327                 return (1);
  328         }
  329 
  330         snum = (pos2 & 0x0e) >> 1;
  331 
  332         *iobasep = MCA_SERIAL[snum].iobase;
  333         *irqp = MCA_SERIAL[snum].irq;
  334 
  335         return (0);
  336 }

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