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Annotation of sys/arch/hppa/gsc/com_gsc.c, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: com_gsc.c,v 1.21 2007/07/15 19:25:49 kettenis Exp $   */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 1998-2003 Michael Shalayeff
        !             5:  * All rights reserved.
        !             6:  *
        !             7:  * Redistribution and use in source and binary forms, with or without
        !             8:  * modification, are permitted provided that the following conditions
        !             9:  * are met:
        !            10:  * 1. Redistributions of source code must retain the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer.
        !            12:  * 2. Redistributions in binary form must reproduce the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer in the
        !            14:  *    documentation and/or other materials provided with the distribution.
        !            15:  *
        !            16:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
        !            17:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
        !            18:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
        !            19:  * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
        !            20:  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
        !            21:  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
        !            22:  * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            23:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
        !            24:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
        !            25:  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
        !            26:  * THE POSSIBILITY OF SUCH DAMAGE.
        !            27:  */
        !            28:
        !            29: #include <sys/param.h>
        !            30: #include <sys/systm.h>
        !            31: #include <sys/device.h>
        !            32: #include <sys/tty.h>
        !            33:
        !            34: #include <machine/bus.h>
        !            35: #include <machine/intr.h>
        !            36: #include <machine/iomod.h>
        !            37: #include <machine/autoconf.h>
        !            38:
        !            39: #include <dev/ic/comreg.h>
        !            40: #include <dev/ic/comvar.h>
        !            41:
        !            42: #include <hppa/dev/cpudevs.h>
        !            43: #include <hppa/gsc/gscbusvar.h>
        !            44:
        !            45: #define COM_GSC_FREQ   7372800
        !            46:
        !            47: struct com_gsc_regs {
        !            48:        u_int8_t reset;
        !            49: };
        !            50:
        !            51: int    com_gsc_probe(struct device *, void *, void *);
        !            52: void   com_gsc_attach(struct device *, struct device *, void *);
        !            53:
        !            54: struct cfattach com_gsc_ca = {
        !            55:        sizeof(struct com_softc), com_gsc_probe, com_gsc_attach
        !            56: };
        !            57:
        !            58: int
        !            59: com_gsc_probe(parent, match, aux)
        !            60:        struct device *parent;
        !            61:        void *match, *aux;
        !            62: {
        !            63:        struct gsc_attach_args *ga = aux;
        !            64:
        !            65:        if (ga->ga_type.iodc_type != HPPA_TYPE_FIO ||
        !            66:            (ga->ga_type.iodc_sv_model != HPPA_FIO_GRS232 &&
        !            67:             ga->ga_type.iodc_sv_model != HPPA_FIO_RS232 &&
        !            68:             ga->ga_type.iodc_sv_model != HPPA_FIO_GRJ16))
        !            69:                return (0);
        !            70:
        !            71:        return (1);
        !            72:        /* HOZER comprobe1(ga->ga_iot, ga->ga_hpa + IOMOD_DEVOFFSET); */
        !            73: }
        !            74:
        !            75: void
        !            76: com_gsc_attach(parent, self, aux)
        !            77:        struct device *parent, *self;
        !            78:        void *aux;
        !            79: {
        !            80:        struct com_softc *sc = (void *)self;
        !            81:        struct gsc_attach_args *ga = aux;
        !            82:
        !            83:        sc->sc_iot = ga->ga_iot;
        !            84:        sc->sc_iobase = (bus_addr_t)ga->ga_hpa;
        !            85:        if (ga->ga_type.iodc_sv_model != HPPA_FIO_GRJ16)
        !            86:                sc->sc_iobase += IOMOD_DEVOFFSET;
        !            87:
        !            88:        if (bus_space_map(sc->sc_iot, sc->sc_iobase, COM_NPORTS,
        !            89:            0, &sc->sc_ioh)) {
        !            90:                printf(": cannot map io space\n");
        !            91:                return;
        !            92:        }
        !            93:
        !            94:        if (PAGE0->mem_cons.pz_class == PCL_DUPLEX &&
        !            95:            PAGE0->mem_cons.pz_hpa == ga->ga_hpa) {
        !            96:                bus_space_unmap(sc->sc_iot, sc->sc_ioh, COM_NPORTS);
        !            97:                comcnattach(sc->sc_iot, sc->sc_iobase, comdefaultrate,
        !            98:                    COM_GSC_FREQ, comconscflag);
        !            99:        }
        !           100:
        !           101:        sc->sc_frequency = COM_GSC_FREQ;
        !           102:        com_attach_subr(sc);
        !           103:
        !           104:        sc->sc_ih = gsc_intr_establish((struct gsc_softc *)parent,
        !           105:            ga->ga_irq, IPL_TTY, comintr, sc, sc->sc_dev.dv_xname);
        !           106: }