sys/arch/hp700/gsc/osiop_gsc.c

   1 /*      $NetBSD: osiop_gsc.c,v 1.14 2009/05/24 06:53:35 skrll Exp $     */
   2
   3 /*
   4  * Copyright (c) 2001 Matt Fredette.  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 AUTHORS ``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 AUTHORS 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 /*-
  30  * Copyright (c) 2001, 2002 Izumi Tsutsui.  All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
  42  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  43  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  44  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  45  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  47  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  48  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  49  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  50  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  51  */
  52
  53 /*      $OpenBSD: siop_gsc.c,v 1.1 1998/11/04 17:01:35 mickey Exp $     */
  54
  55 /*
  56  * Copyright (c) 1998 Michael Shalayeff
  57  * All rights reserved.
  58  *
  59  * Redistribution and use in source and binary forms, with or without
  60  * modification, are permitted provided that the following conditions
  61  * are met:
  62  * 1. Redistributions of source code must retain the above copyright
  63  *    notice, this list of conditions and the following disclaimer.
  64  * 2. Redistributions in binary form must reproduce the above copyright
  65  *    notice, this list of conditions and the following disclaimer in the
  66  *    documentation and/or other materials provided with the distribution.
  67  * 3. The name of the author may not be used to endorse or promote products
  68  *    derived from this software without specific prior written permission.
  69  *
  70  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  71  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  72  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  73  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  74  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  75  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  76  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  77  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  78  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  79  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  80  */
  81
  82 #include <sys/cdefs.h>
  83 __KERNEL_RCSID(0, "$NetBSD: osiop_gsc.c,v 1.14 2009/05/24 06:53:35 skrll Exp $");
  84
  85 #include <sys/param.h>
  86 #include <sys/systm.h>
  87 #include <sys/device.h>
  88 #include <sys/buf.h>
  89 #include <sys/malloc.h>
  90
  91 #include <dev/scsipi/scsi_all.h>
  92 #include <dev/scsipi/scsipi_all.h>
  93 #include <dev/scsipi/scsiconf.h>
  94
  95 #include <machine/cpu.h>
  96 #include <machine/intr.h>
  97 #include <machine/iomod.h>
  98 #include <machine/autoconf.h>
  99 #include <machine/bus.h>
 100
 101 #include <dev/ic/osiopreg.h>
 102 #include <dev/ic/osiopvar.h>
 103
 104 #include <hp700/dev/cpudevs.h>
 105 #include <hp700/gsc/gscbusvar.h>
 106 #include <hp700/hp700/machdep.h>
 107
 108 #define OSIOP_GSC_RESET         0x0000
 109 #define OSIOP_GSC_OFFSET        0x0100
 110
 111 int osiop_gsc_match(device_t, cfdata_t, void *);
 112 void osiop_gsc_attach(device_t, device_t, void *);
 113 int osiop_gsc_intr(void *);
 114
 115 CFATTACH_DECL_NEW(osiop_gsc, sizeof(struct osiop_softc),
 116     osiop_gsc_match, osiop_gsc_attach, NULL, NULL);
 117
 118 int
 119 osiop_gsc_match(device_t parent, cfdata_t cf, void *aux)
 120 {
 121         struct gsc_attach_args *ga = aux;
 122         bus_space_handle_t ioh;
 123         int rv = 1;
 124
 125         if (ga->ga_type.iodc_type != HPPA_TYPE_FIO ||
 126             (ga->ga_type.iodc_sv_model != HPPA_FIO_GSCSI))
 127                 return 0;
 128
 129         if (bus_space_map(ga->ga_iot, ga->ga_hpa,
 130             OSIOP_GSC_OFFSET + OSIOP_NREGS, 0, &ioh))
 131                 return 0;
 132
 133
 134         bus_space_unmap(ga->ga_iot, ioh, OSIOP_GSC_OFFSET + OSIOP_NREGS);
 135         return rv;
 136 }
 137
 138 void
 139 osiop_gsc_attach(device_t parent, device_t self, void *aux)
 140 {
 141         struct osiop_softc *sc = device_private(self);
 142         struct gsc_attach_args *ga = aux;
 143         bus_space_handle_t ioh;
 144
 145         sc->sc_dev = self;
 146         sc->sc_bst = ga->ga_iot;
 147         sc->sc_dmat = ga->ga_dmatag;
 148         if (bus_space_map(sc->sc_bst, ga->ga_hpa,
 149             OSIOP_GSC_OFFSET + OSIOP_NREGS, 0, &ioh))
 150                 panic("%s: couldn't map I/O ports", __func__);
 151         if (bus_space_subregion(sc->sc_bst, ioh,
 152             OSIOP_GSC_OFFSET, OSIOP_NREGS, &sc->sc_reg))
 153                 panic("%s: couldn't get chip ports", __func__);
 154
 155         sc->sc_clock_freq = ga->ga_ca.ca_pdc_iodc_read->filler2[14] / 1000000;
 156         if (!sc->sc_clock_freq)
 157                 sc->sc_clock_freq = 50;
 158
 159         sc->sc_ctest7 = 0; /* | OSIOP_CTEST7_TT1 */
 160         sc->sc_dcntl = OSIOP_DCNTL_EA;
 161
 162         sc->sc_flags = 0;
 163         sc->sc_id = ga->ga_scsi_target;
 164
 165         /*
 166          * Reset the SCSI subsystem.
 167          */
 168         bus_space_write_1(sc->sc_bst, ioh, OSIOP_GSC_RESET, 0);
 169         DELAY(1000);
 170
 171         /*
 172          * Call common attachment
 173          */
 174 #ifdef OSIOP_DEBUG
 175         {
 176                 extern int osiop_debug;
 177                 osiop_debug = -1;
 178         }
 179 #endif /* OSIOP_DEBUG */
 180         osiop_attach(sc);
 181
 182         (void)hp700_intr_establish(self, IPL_BIO,
 183             osiop_gsc_intr, sc, ga->ga_int_reg, ga->ga_irq);
 184 }
 185
 186 /*
 187  * interrupt handler
 188  */
 189 int
 190 osiop_gsc_intr(void *arg)
 191 {
 192         struct osiop_softc *sc = arg;
 193         uint8_t istat;
 194
 195         /* This is potentially nasty, since the IRQ is level triggered... */
 196         if (sc->sc_flags & OSIOP_INTSOFF)
 197                 return (0);
 198
 199         istat = osiop_read_1(sc, OSIOP_ISTAT);
 200
 201         if ((istat & (OSIOP_ISTAT_SIP | OSIOP_ISTAT_DIP)) == 0)
 202                 return (0);
 203
 204         /* Save interrupt details for the back-end interrupt handler */
 205         sc->sc_sstat0 = osiop_read_1(sc, OSIOP_SSTAT0);
 206         sc->sc_istat = istat;
 207         /*
 208          * Per page 4-18 of the LSI 53C710 Technical Manual,
 209          * "insert a delay equivalent to 12 BCLK periods between
 210          * the reads [of DSTAT and SSTAT0] to ensure that the
 211          * interrupts clear properly."
 212          */
 213         DELAY(100);
 214         sc->sc_dstat = osiop_read_1(sc, OSIOP_DSTAT);
 215
 216         /* Deal with the interrupt */
 217         osiop_intr(sc);
 218
 219         /* Blink the LED. */
 220         hp700_led_blink(HP700_LED_DISK);
 221
 222         return (1);
 223 }