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osiop_jazzio.c revision 1.5.8.1 
      1 /* $NetBSD: osiop_jazzio.c,v 1.5.8.1 2005/04/29 11:28:02 kent 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 1.5.8.1 2005/04/29 11:28:02 kent 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(struct device *parent, struct cfdata *match, void *aux)
     60 {
     61 	struct jazzio_attach_args *ja = aux;
     62 
     63 	if (strcmp(ja->ja_name, "NCRC710") != 0)
     64 		return 0;
     65 
     66 	return 1;
     67 }
     68 
     69 void
     70 osiop_jazzio_attach(struct device *parent, struct device *self, void *aux)
     71 {
     72 	struct jazzio_attach_args *ja = aux;
     73 	struct osiop_softc *sc = (void *)self;
     74 	int err, scid;
     75 
     76 	sc->sc_bst = ja->ja_bust;
     77 	sc->sc_dmat = ja->ja_dmat;
     78 
     79 	/*
     80 	 * Map registers
     81 	 */
     82 	err = bus_space_map(sc->sc_bst, ja->ja_addr,
     83 	    OSIOP_NREGS, 0, &sc->sc_reg);
     84 	if (err) {
     85 		printf("%s: failed to map registers, err=%d\n",
     86 		    sc->sc_dev.dv_xname, err);
     87 		return;
     88 	}
     89 
     90 	sc->sc_clock_freq = 50;	/* MHz */
     91 	sc->sc_ctest7 = 0; /* | OSIOP_CTEST7_TT1 */
     92 	sc->sc_dcntl = OSIOP_DCNTL_EA;
     93 
     94 	/* XXX should check ID in BIOS variables? */
     95 	scid = ffs(osiop_read_1(sc, OSIOP_SCID));
     96 
     97 	if (scid == 0)
     98 		scid = 7;
     99 	else
    100 		scid--;
    101 
    102 	sc->sc_id = scid;
    103 
    104 	/*
    105 	 * Call common attachment
    106 	 */
    107 	osiop_attach(sc);
    108 
    109 	/*
    110 	 * Set up interrupt handler.
    111          */
    112 	jazzio_intr_establish(ja->ja_intr,
    113 	    (intr_handler_t)osiop_jazzio_intr, sc);
    114 }
    115 
    116 /*
    117  * interrupt handler
    118  */
    119 int
    120 osiop_jazzio_intr(void *arg)
    121 {
    122 	struct osiop_softc *sc = arg;
    123 	uint8_t istat;
    124 
    125 	/* This is potentially nasty, since the IRQ is level triggered... */
    126 	if (sc->sc_flags & OSIOP_INTSOFF)
    127 		return 0;
    128 
    129 	istat = osiop_read_1(sc, OSIOP_ISTAT);
    130 
    131 	if ((istat & (OSIOP_ISTAT_SIP | OSIOP_ISTAT_DIP)) == 0)
    132 		return 0;
    133 
    134 	/* Save interrupt details for the back-end interrupt handler */
    135 	sc->sc_sstat0 = osiop_read_1(sc, OSIOP_SSTAT0);
    136 	sc->sc_istat = istat;
    137 	sc->sc_dstat = osiop_read_1(sc, OSIOP_DSTAT);
    138 
    139 	/* Deal with the interrupt */
    140 	osiop_intr(sc);
    141 
    142 	return 1;
    143 }
    144