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      1 /* $NetBSD: osiop_jazzio.c,v 1.11 2023/12/20 06:36:02 thorpej 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  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #include <sys/cdefs.h>
     28 __KERNEL_RCSID(0, "$NetBSD: osiop_jazzio.c,v 1.11 2023/12/20 06:36:02 thorpej Exp $");
     29 
     30 #include <sys/param.h>
     31 #include <sys/systm.h>
     32 #include <sys/device.h>
     33 #include <sys/buf.h>
     34 
     35 #include <dev/scsipi/scsi_all.h>
     36 #include <dev/scsipi/scsipi_all.h>
     37 #include <dev/scsipi/scsiconf.h>
     38 
     39 #include <machine/cpu.h>
     40 #include <machine/autoconf.h>
     41 #include <sys/bus.h>
     42 
     43 #include <dev/ic/osiopreg.h>
     44 #include <dev/ic/osiopvar.h>
     45 
     46 #include <arc/jazz/jazziovar.h>
     47 
     48 int osiop_jazzio_match(device_t, cfdata_t, void *);
     49 void osiop_jazzio_attach(device_t, device_t, void *);
     50 int osiop_jazzio_intr(void *);
     51 
     52 CFATTACH_DECL_NEW(osiop_jazzio, sizeof(struct osiop_softc),
     53     osiop_jazzio_match, osiop_jazzio_attach, NULL, NULL);
     54 
     55 int
     56 osiop_jazzio_match(device_t parent, cfdata_t cf, void *aux)
     57 {
     58 	struct jazzio_attach_args *ja = aux;
     59 
     60 	if (strcmp(ja->ja_name, "NCRC710") != 0)
     61 		return 0;
     62 
     63 	return 1;
     64 }
     65 
     66 void
     67 osiop_jazzio_attach(device_t parent, device_t self, void *aux)
     68 {
     69 	struct osiop_softc *sc = device_private(self);
     70 	struct jazzio_attach_args *ja = aux;
     71 	int err, scid;
     72 
     73 	sc->sc_dev = self;
     74 	sc->sc_bst = ja->ja_bust;
     75 	sc->sc_dmat = ja->ja_dmat;
     76 
     77 	/*
     78 	 * Map registers
     79 	 */
     80 	err = bus_space_map(sc->sc_bst, ja->ja_addr,
     81 	    OSIOP_NREGS, 0, &sc->sc_reg);
     82 	if (err) {
     83 		aprint_error(": failed to map registers, err=%d\n", err);
     84 		return;
     85 	}
     86 
     87 	sc->sc_clock_freq = 50;	/* MHz */
     88 	sc->sc_ctest7 = 0; /* | OSIOP_CTEST7_TT1 */
     89 	sc->sc_dcntl = OSIOP_DCNTL_EA;
     90 
     91 	/* XXX should check ID in BIOS variables? */
     92 	scid = ffs(osiop_read_1(sc, OSIOP_SCID));
     93 
     94 	if (scid == 0)
     95 		scid = 7;
     96 	else
     97 		scid--;
     98 
     99 	sc->sc_id = scid;
    100 
    101 	/*
    102 	 * Call common attachment
    103 	 */
    104 	osiop_attach(sc);
    105 
    106 	/*
    107 	 * Set up interrupt handler.
    108          */
    109 	jazzio_intr_establish(ja->ja_intr,
    110 	    (intr_handler_t)osiop_jazzio_intr, sc);
    111 }
    112 
    113 /*
    114  * interrupt handler
    115  */
    116 int
    117 osiop_jazzio_intr(void *arg)
    118 {
    119 	struct osiop_softc *sc = arg;
    120 	uint8_t istat;
    121 
    122 	/* This is potentially nasty, since the IRQ is level triggered... */
    123 	if (sc->sc_flags & OSIOP_INTSOFF)
    124 		return 0;
    125 
    126 	istat = osiop_read_1(sc, OSIOP_ISTAT);
    127 
    128 	if ((istat & (OSIOP_ISTAT_SIP | OSIOP_ISTAT_DIP)) == 0)
    129 		return 0;
    130 
    131 	/* Save interrupt details for the back-end interrupt handler */
    132 	sc->sc_sstat0 = osiop_read_1(sc, OSIOP_SSTAT0);
    133 	sc->sc_istat = istat;
    134 	sc->sc_dstat = osiop_read_1(sc, OSIOP_DSTAT);
    135 
    136 	/* Deal with the interrupt */
    137 	osiop_intr(sc);
    138 
    139 	return 1;
    140 }
    141