/*      $NetBSD: tcom.c,v 1.22 2021/08/07 16:19:12 thorpej Exp $        */

/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Eric S. Hvozda.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

/*
* Copyright (c) 1998 Jukka Marin.  All rights reserved.
* Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
* Copyright (c) 1995 Charles Hannum.  All rights reserved.
*
* This code is derived from public-domain software written by
* Roland McGrath.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by Charles Hannum.
* 4. The name of the author may not be used to endorse or promote products
*    derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/*
* NOTE: This driver has been tested in TCOM "UNIX mode" with base address
* set to 0x100 or 0x200 and baud rate jumpers to "normal".  This code
* does NOT know about the 2x and 4x baud rates available on TCOM cards.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: tcom.c,v 1.22 2021/08/07 16:19:12 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/termios.h>

#include <sys/bus.h>
#include <sys/intr.h>

#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>

#include <dev/isa/isavar.h>
#include <dev/isa/com_multi.h>

#define NSLAVES 8                       /* TCOM cards have 4 or 8 UARTs */
#define STATUS_OFFSET   0x40            /* offset from board base address */
#define STATUS_SIZE     8               /* 8 bytes reserved for irq status */

struct tcom_softc {
       device_t sc_dev;
       void *sc_ih;

       bus_space_tag_t sc_iot;
       int sc_iobase;

       int sc_alive;                   /* mask of slave units attached */
       void *sc_slaves[NSLAVES];       /* com device softc pointers */
       bus_space_handle_t sc_slaveioh[NSLAVES];
       bus_space_handle_t sc_statusioh;
};

int tcomprobe(device_t, cfdata_t, void *);
void tcomattach(device_t, device_t, void *);
int tcomintr(void *);

CFATTACH_DECL_NEW(tcom, sizeof(struct tcom_softc),
   tcomprobe, tcomattach, NULL, NULL);

int
tcomprobe(device_t parent, cfdata_t self, void *aux)
{
       struct isa_attach_args *ia = aux;
       bus_space_tag_t iot = ia->ia_iot;
       bus_space_handle_t ioh;
       int i, iobase, rv = 1;

       /*
        * Do the normal com probe for the first UART and assume
        * its presence, and the ability to map the other UARTS,
        * means there is a multiport board there.
        * XXX Needs more robustness.
        */

       if (ia->ia_nio < 1)
               return (0);
       if (ia->ia_nirq < 1)
               return (1);

       if (ISA_DIRECT_CONFIG(ia))
               return (0);

       /* Disallow wildcarded i/o address. */
       if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
               return (0);
       if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ)
               return (0);

       /* if the first port is in use as console, then it. */
       if (com_is_console(iot, ia->ia_io[0].ir_addr, 0))
               goto checkmappings;

       if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) {
               rv = 0;
               goto out;
       }
       rv = comprobe1(iot, ioh);
       bus_space_unmap(iot, ioh, COM_NPORTS);
       if (rv == 0)
               goto out;

checkmappings:
       for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) {
               iobase += COM_NPORTS;

               if (com_is_console(iot, iobase, 0))
                       continue;

               if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
                       rv = 0;
                       goto out;
               }
               bus_space_unmap(iot, ioh, COM_NPORTS);
       }

out:
       if (rv) {
               ia->ia_nio = 1;
               ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS;

               ia->ia_nirq = 1;

               ia->ia_niomem = 0;
               ia->ia_ndrq = 0;
       }
       return (rv);
}

void
tcomattach(device_t parent, device_t self, void *aux)
{
       struct tcom_softc *sc = device_private(self);
       struct isa_attach_args *ia = aux;
       struct commulti_attach_args ca;
       bus_space_tag_t iot = ia->ia_iot;
       int i, iobase;
       device_t slave;

       printf("\n");

       sc->sc_dev = self;
       sc->sc_iot = ia->ia_iot;
       sc->sc_iobase = ia->ia_io[0].ir_addr;

       for (i = 0; i < NSLAVES; i++) {
               iobase = sc->sc_iobase + i * COM_NPORTS;
               if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) &&
                   bus_space_map(iot, iobase, COM_NPORTS, 0,
                       &sc->sc_slaveioh[i])) {
                       aprint_error_dev(sc->sc_dev,
                           "can't map i/o space for slave %d\n", i);
                       return;
               }
       }

       if (bus_space_map(iot, sc->sc_iobase + STATUS_OFFSET, STATUS_SIZE, 0,
           &sc->sc_statusioh)) {
               aprint_error_dev(sc->sc_dev, "can't map status space\n");
               return;
       }

       for (i = 0; i < NSLAVES; i++) {
               ca.ca_slave = i;
               ca.ca_iot = sc->sc_iot;
               ca.ca_ioh = sc->sc_slaveioh[i];
               ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS;
               ca.ca_noien = 0;

               slave = config_found(self, &ca, commultiprint, CFARGS_NONE);
               if (slave != NULL) {
                       sc->sc_alive |= 1 << i;
                       sc->sc_slaves[i] = device_private(slave);
               }
       }

       sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq,
           IST_EDGE, IPL_SERIAL, tcomintr, sc);
}

int
tcomintr(void *arg)
{
       struct tcom_softc *sc = arg;
       bus_space_tag_t iot = sc->sc_iot;
       int alive = sc->sc_alive;
       int bits;

       bits = ~bus_space_read_1(iot, sc->sc_statusioh, 0) & alive;
       if (bits == 0)
               return (0);

       for (;;) {
#define TRY(n) \
               if (bits & (1 << (n))) \
                       comintr(sc->sc_slaves[n]);
               TRY(0);
               TRY(1);
               TRY(2);
               TRY(3);
               TRY(4);
               TRY(5);
               TRY(6);
               TRY(7);
#undef TRY
               bits = ~bus_space_read_1(iot, sc->sc_statusioh, 0) & alive;
               if (bits == 0)
                       return (1);
       }
}

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.