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osiop_jazzio.c revision 1.4.2.1
      1 /* $NetBSD: osiop_jazzio.c,v 1.4.2.1 2004/08/03 10:32:22 skrll Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2001 Izumi Tsutsui.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. The name of the author may not be used to endorse or promote products
     15  *    derived from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: osiop_jazzio.c,v 1.4.2.1 2004/08/03 10:32:22 skrll Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/systm.h>
     34 #include <sys/device.h>
     35 #include <sys/buf.h>
     36 #include <sys/malloc.h>
     37 
     38 #include <dev/scsipi/scsi_all.h>
     39 #include <dev/scsipi/scsipi_all.h>
     40 #include <dev/scsipi/scsiconf.h>
     41 
     42 #include <machine/cpu.h>
     43 #include <machine/autoconf.h>
     44 #include <machine/bus.h>
     45 
     46 #include <dev/ic/osiopreg.h>
     47 #include <dev/ic/osiopvar.h>
     48 
     49 #include <arc/jazz/jazziovar.h>
     50 
     51 int osiop_jazzio_match(struct device *, struct cfdata *, void *);
     52 void osiop_jazzio_attach(struct device *, struct device *, void *);
     53 int osiop_jazzio_intr(void *);
     54 
     55 CFATTACH_DECL(osiop_jazzio, sizeof(struct osiop_softc),
     56     osiop_jazzio_match, osiop_jazzio_attach, NULL, NULL);
     57 
     58 int
     59 osiop_jazzio_match(parent, match, aux)
     60 	struct device *parent;
     61 	struct cfdata *match;
     62 	void *aux;
     63 {
     64 	struct jazzio_attach_args *ja = aux;
     65 
     66 	if (strcmp(ja->ja_name, "NCRC710") != 0)
     67 		return (0);
     68 
     69 	return (1);
     70 }
     71 
     72 void
     73 osiop_jazzio_attach(parent, self, aux)
     74 	struct device *parent;
     75 	struct device *self;
     76 	void *aux;
     77 {
     78 	struct jazzio_attach_args *ja = aux;
     79 	struct osiop_softc *sc = (void *)self;
     80 	int err, scid;
     81 
     82 	sc->sc_bst = ja->ja_bust;
     83 	sc->sc_dmat = ja->ja_dmat;
     84 
     85 	/*
     86 	 * Map registers
     87 	 */
     88 	err = bus_space_map(sc->sc_bst, ja->ja_addr,
     89 	    OSIOP_NREGS, 0, &sc->sc_reg);
     90 	if (err) {
     91 		printf("%s: failed to map registers, err=%d\n",
     92 		    sc->sc_dev.dv_xname, err);
     93 		return;
     94 	}
     95 
     96 	sc->sc_clock_freq = 50;	/* MHz */
     97 	sc->sc_ctest7 = 0; /* | OSIOP_CTEST7_TT1 */
     98 	sc->sc_dcntl = OSIOP_DCNTL_EA;
     99 
    100 	/* XXX should check ID in BIOS variables? */
    101 	scid = ffs(osiop_read_1(sc, OSIOP_SCID));
    102 
    103 	if (scid == 0)
    104 		scid = 7;
    105 	else
    106 		scid--;
    107 
    108 	sc->sc_id = scid;
    109 
    110 	/*
    111 	 * Call common attachment
    112 	 */
    113 	osiop_attach(sc);
    114 
    115 	/*
    116 	 * Set up interrupt handler.
    117          */
    118 	jazzio_intr_establish(ja->ja_intr,
    119 	    (intr_handler_t)osiop_jazzio_intr, sc);
    120 }
    121 
    122 /*
    123  * interrupt handler
    124  */
    125 int
    126 osiop_jazzio_intr(arg)
    127 	void *arg;
    128 {
    129 	struct osiop_softc *sc = arg;
    130 	u_int8_t istat;
    131 
    132 	/* This is potentially nasty, since the IRQ is level triggered... */
    133 	if (sc->sc_flags & OSIOP_INTSOFF)
    134 		return (0);
    135 
    136 	istat = osiop_read_1(sc, OSIOP_ISTAT);
    137 
    138 	if ((istat & (OSIOP_ISTAT_SIP | OSIOP_ISTAT_DIP)) == 0)
    139 		return (0);
    140 
    141 	/* Save interrupt details for the back-end interrupt handler */
    142 	sc->sc_sstat0 = osiop_read_1(sc, OSIOP_SSTAT0);
    143 	sc->sc_istat = istat;
    144 	sc->sc_dstat = osiop_read_1(sc, OSIOP_DSTAT);
    145 
    146 	/* Deal with the interrupt */
    147 	osiop_intr(sc);
    148 
    149 	return (1);
    150 }
    151