sys/powerpc/ofw/openpic_ofw.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright 2003 by Peter Grehan. 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,
  22  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  24  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  25  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  */
  30
  31 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  33
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36 #include <sys/module.h>
  37 #include <sys/bus.h>
  38 #include <sys/conf.h>
  39 #include <sys/kernel.h>
  40
  41 #include <dev/ofw/ofw_bus.h>
  42 #include <dev/ofw/ofw_bus_subr.h>
  43 #include <dev/ofw/openfirm.h>
  44
  45 #include <machine/bus.h>
  46 #include <machine/intr_machdep.h>
  47 #include <machine/md_var.h>
  48 #include <machine/pio.h>
  49 #include <machine/resource.h>
  50
  51 #include <vm/vm.h>
  52 #include <vm/pmap.h>
  53
  54 #include <sys/rman.h>
  55
  56 #include <machine/openpicreg.h>
  57 #include <machine/openpicvar.h>
  58
  59 #include "pic_if.h"
  60
  61 /*
  62  * OFW interface
  63  */
  64 static int      openpic_ofw_probe(device_t);
  65 static int      openpic_ofw_attach(device_t);
  66
  67 static void     openpic_ofw_translate_code(device_t, u_int irq, int code,
  68                     enum intr_trigger *trig, enum intr_polarity *pol);
  69
  70 static device_method_t  openpic_ofw_methods[] = {
  71         /* Device interface */
  72         DEVMETHOD(device_probe,         openpic_ofw_probe),
  73         DEVMETHOD(device_attach,        openpic_ofw_attach),
  74         DEVMETHOD(device_suspend,       openpic_suspend),
  75         DEVMETHOD(device_resume,        openpic_resume),
  76
  77         /* PIC interface */
  78         DEVMETHOD(pic_bind,             openpic_bind),
  79         DEVMETHOD(pic_config,           openpic_config),
  80         DEVMETHOD(pic_dispatch,         openpic_dispatch),
  81         DEVMETHOD(pic_enable,           openpic_enable),
  82         DEVMETHOD(pic_eoi,              openpic_eoi),
  83         DEVMETHOD(pic_ipi,              openpic_ipi),
  84         DEVMETHOD(pic_mask,             openpic_mask),
  85         DEVMETHOD(pic_unmask,           openpic_unmask),
  86
  87         DEVMETHOD(pic_translate_code,   openpic_ofw_translate_code),
  88
  89         DEVMETHOD_END
  90 };
  91
  92 static driver_t openpic_ofw_driver = {
  93         "openpic",
  94         openpic_ofw_methods,
  95         sizeof(struct openpic_softc),
  96 };
  97
  98 DRIVER_MODULE(openpic, ofwbus, openpic_ofw_driver, openpic_devclass, 0, 0);
  99 DRIVER_MODULE(openpic, simplebus, openpic_ofw_driver, openpic_devclass, 0, 0);
 100 DRIVER_MODULE(openpic, macio, openpic_ofw_driver, openpic_devclass, 0, 0);
 101
 102 static int
 103 openpic_ofw_probe(device_t dev)
 104 {
 105         const char *type = ofw_bus_get_type(dev);
 106
 107         if (type == NULL)
 108                 return (ENXIO);
 109
 110         if (!ofw_bus_is_compatible(dev, "chrp,open-pic") &&
 111             strcmp(type, "open-pic") != 0)
 112                 return (ENXIO);
 113
 114         /*
 115          * On some U4 systems, there is a phantom MPIC in the mac-io cell.
 116          * The uninorth driver will pick up the real PIC, so ignore it here.
 117          */
 118         if (OF_finddevice("/u4") != (phandle_t)-1)
 119                 return (ENXIO);
 120
 121         device_set_desc(dev, OPENPIC_DEVSTR);
 122         return (0);
 123 }
 124
 125 static int
 126 openpic_ofw_attach(device_t dev)
 127 {
 128         phandle_t xref, node;
 129
 130         node = ofw_bus_get_node(dev);
 131
 132         if (OF_getencprop(node, "phandle", &xref, sizeof(xref)) == -1 &&
 133             OF_getencprop(node, "ibm,phandle", &xref, sizeof(xref)) == -1 &&
 134             OF_getencprop(node, "linux,phandle", &xref, sizeof(xref)) == -1)
 135                 xref = node;
 136
 137         return (openpic_common_attach(dev, xref));
 138 }
 139
 140 static void
 141 openpic_ofw_translate_code(device_t dev, u_int irq, int code,
 142     enum intr_trigger *trig, enum intr_polarity *pol)
 143 {
 144         switch (code) {
 145         case 0:
 146                 /* L to H edge */
 147                 *trig = INTR_TRIGGER_EDGE;
 148                 *pol = INTR_POLARITY_HIGH;
 149                 break;
 150         case 1:
 151                 /* Active L level */
 152                 *trig = INTR_TRIGGER_LEVEL;
 153                 *pol = INTR_POLARITY_LOW;
 154                 break;
 155         case 2:
 156                 /* Active H level */
 157                 *trig = INTR_TRIGGER_LEVEL;
 158                 *pol = INTR_POLARITY_HIGH;
 159                 break;
 160         case 3:
 161                 /* H to L edge */
 162                 *trig = INTR_TRIGGER_EDGE;
 163                 *pol = INTR_POLARITY_LOW;
 164                 break;
 165         default:
 166                 *trig = INTR_TRIGGER_CONFORM;
 167                 *pol = INTR_POLARITY_CONFORM;
 168         }
 169 }
 170