sys/powerpc/ofw/openpic_ofw.c

   1 /*-
   2  * Copyright 2003 by Peter Grehan. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  * 3. The name of the author may not be used to endorse or promote products
  13  *    derived from this software without specific prior written permission.
  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,
  20  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  21  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  22  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  23  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  *
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __FBSDID("$FreeBSD$");
  31
  32 #include <sys/param.h>
  33 #include <sys/systm.h>
  34 #include <sys/module.h>
  35 #include <sys/bus.h>
  36 #include <sys/conf.h>
  37 #include <sys/kernel.h>
  38
  39 #include <dev/ofw/ofw_bus.h>
  40 #include <dev/ofw/ofw_bus_subr.h>
  41 #include <dev/ofw/openfirm.h>
  42
  43 #include <machine/bus.h>
  44 #include <machine/intr_machdep.h>
  45 #include <machine/md_var.h>
  46 #include <machine/pio.h>
  47 #include <machine/resource.h>
  48
  49 #include <vm/vm.h>
  50 #include <vm/pmap.h>
  51
  52 #include <sys/rman.h>
  53
  54 #include <machine/openpicvar.h>
  55
  56 #include "pic_if.h"
  57
  58 /*
  59  * OFW interface
  60  */
  61 static int      openpic_ofw_probe(device_t);
  62 static int      openpic_ofw_attach(device_t);
  63
  64 static void     openpic_ofw_translate_code(device_t, u_int irq, int code,
  65                     enum intr_trigger *trig, enum intr_polarity *pol);
  66
  67 static device_method_t  openpic_ofw_methods[] = {
  68         /* Device interface */
  69         DEVMETHOD(device_probe,         openpic_ofw_probe),
  70         DEVMETHOD(device_attach,        openpic_ofw_attach),
  71
  72         /* PIC interface */
  73         DEVMETHOD(pic_bind,             openpic_bind),
  74         DEVMETHOD(pic_config,           openpic_config),
  75         DEVMETHOD(pic_dispatch,         openpic_dispatch),
  76         DEVMETHOD(pic_enable,           openpic_enable),
  77         DEVMETHOD(pic_eoi,              openpic_eoi),
  78         DEVMETHOD(pic_ipi,              openpic_ipi),
  79         DEVMETHOD(pic_mask,             openpic_mask),
  80         DEVMETHOD(pic_unmask,           openpic_unmask),
  81
  82         DEVMETHOD(pic_translate_code,   openpic_ofw_translate_code),
  83
  84         DEVMETHOD_END
  85 };
  86
  87 static driver_t openpic_ofw_driver = {
  88         "openpic",
  89         openpic_ofw_methods,
  90         sizeof(struct openpic_softc),
  91 };
  92
  93 DRIVER_MODULE(openpic, ofwbus, openpic_ofw_driver, openpic_devclass, 0, 0);
  94 DRIVER_MODULE(openpic, simplebus, openpic_ofw_driver, openpic_devclass, 0, 0);
  95 DRIVER_MODULE(openpic, macio, openpic_ofw_driver, openpic_devclass, 0, 0);
  96
  97 static int
  98 openpic_ofw_probe(device_t dev)
  99 {
 100         const char *type = ofw_bus_get_type(dev);
 101
 102         if (type == NULL)
 103                 return (ENXIO);
 104
 105         if (!ofw_bus_is_compatible(dev, "chrp,open-pic") &&
 106             strcmp(type, "open-pic") != 0)
 107                 return (ENXIO);
 108
 109         /*
 110          * On some U4 systems, there is a phantom MPIC in the mac-io cell.
 111          * The uninorth driver will pick up the real PIC, so ignore it here.
 112          */
 113         if (OF_finddevice("/u4") != (phandle_t)-1)
 114                 return (ENXIO);
 115
 116         device_set_desc(dev, OPENPIC_DEVSTR);
 117         return (0);
 118 }
 119
 120 static int
 121 openpic_ofw_attach(device_t dev)
 122 {
 123         phandle_t xref, node;
 124
 125         node = ofw_bus_get_node(dev);
 126
 127         if (OF_getprop(node, "phandle", &xref, sizeof(xref)) == -1 &&
 128             OF_getprop(node, "ibm,phandle", &xref, sizeof(xref)) == -1 &&
 129             OF_getprop(node, "linux,phandle", &xref, sizeof(xref)) == -1)
 130                 xref = node;
 131
 132         return (openpic_common_attach(dev, xref));
 133 }
 134
 135 static void
 136 openpic_ofw_translate_code(device_t dev, u_int irq, int code,
 137     enum intr_trigger *trig, enum intr_polarity *pol)
 138 {
 139         switch (code) {
 140         case 0:
 141                 /* L to H edge */
 142                 *trig = INTR_TRIGGER_EDGE;
 143                 *pol = INTR_POLARITY_HIGH;
 144                 break;
 145         case 1:
 146                 /* Active L level */
 147                 *trig = INTR_TRIGGER_LEVEL;
 148                 *pol = INTR_POLARITY_LOW;
 149                 break;
 150         case 2:
 151                 /* Active H level */
 152                 *trig = INTR_TRIGGER_LEVEL;
 153                 *pol = INTR_POLARITY_HIGH;
 154                 break;
 155         case 3:
 156                 /* H to L edge */
 157                 *trig = INTR_TRIGGER_EDGE;
 158                 *pol = INTR_POLARITY_LOW;
 159                 break;
 160         default:
 161                 *trig = INTR_TRIGGER_CONFORM;
 162                 *pol = INTR_POLARITY_CONFORM;
 163         }
 164 }
 165