sys/arm/ti/omap4/omap4_wugen.c

   1 /*-
   2  * Copyright (c) 2016 Svatopluk Kraus
   3  * Copyright (c) 2016 Michal Meloun
   4  * 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 AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, 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 #include <sys/cdefs.h>
  29 __FBSDID("$FreeBSD$");
  30
  31 #include <sys/param.h>
  32 #include <sys/bus.h>
  33 #include <sys/conf.h>
  34 #include <sys/kernel.h>
  35 #include <sys/module.h>
  36 #include <sys/rman.h>
  37 #include <sys/systm.h>
  38
  39 #include <machine/fdt.h>
  40 #include <machine/intr.h>
  41 #include <machine/resource.h>
  42
  43 #include <dev/ofw/ofw_bus.h>
  44 #include <dev/ofw/ofw_bus_subr.h>
  45
  46 #include "pic_if.h"
  47
  48 static struct ofw_compat_data compat_data[] = {
  49         {"ti,omap4-wugen-mpu",  1},
  50         {NULL,                  0}
  51 };
  52
  53 struct omap4_wugen_sc {
  54         device_t                sc_dev;
  55         struct resource         *sc_mem_res;
  56         device_t                sc_parent;
  57 };
  58
  59 static int
  60 omap4_wugen_activate_intr(device_t dev, struct intr_irqsrc *isrc,
  61     struct resource *res, struct intr_map_data *data)
  62 {
  63         struct omap4_wugen_sc *sc = device_get_softc(dev);
  64
  65         return (PIC_ACTIVATE_INTR(sc->sc_parent, isrc, res, data));
  66 }
  67
  68 static void
  69 omap4_wugen_disable_intr(device_t dev, struct intr_irqsrc *isrc)
  70 {
  71         struct omap4_wugen_sc *sc = device_get_softc(dev);
  72
  73         PIC_DISABLE_INTR(sc->sc_parent, isrc);
  74 }
  75
  76 static void
  77 omap4_wugen_enable_intr(device_t dev, struct intr_irqsrc *isrc)
  78 {
  79         struct omap4_wugen_sc *sc = device_get_softc(dev);
  80
  81         PIC_ENABLE_INTR(sc->sc_parent, isrc);
  82 }
  83
  84 static int
  85 omap4_wugen_map_intr(device_t dev, struct intr_map_data *data,
  86     struct intr_irqsrc **isrcp)
  87 {
  88         struct omap4_wugen_sc *sc = device_get_softc(dev);
  89
  90         return (PIC_MAP_INTR(sc->sc_parent, data, isrcp));
  91 }
  92
  93 static int
  94 omap4_wugen_deactivate_intr(device_t dev, struct intr_irqsrc *isrc,
  95     struct resource *res, struct intr_map_data *data)
  96 {
  97         struct omap4_wugen_sc *sc = device_get_softc(dev);
  98
  99         return (PIC_DEACTIVATE_INTR(sc->sc_parent, isrc, res, data));
 100 }
 101
 102 static int
 103 omap4_wugen_setup_intr(device_t dev, struct intr_irqsrc *isrc,
 104     struct resource *res, struct intr_map_data *data)
 105 {
 106         struct omap4_wugen_sc *sc = device_get_softc(dev);
 107
 108         return (PIC_SETUP_INTR(sc->sc_parent, isrc, res, data));
 109 }
 110
 111 static int
 112 omap4_wugen_teardown_intr(device_t dev, struct intr_irqsrc *isrc,
 113     struct resource *res, struct intr_map_data *data)
 114 {
 115         struct omap4_wugen_sc *sc = device_get_softc(dev);
 116
 117         return (PIC_TEARDOWN_INTR(sc->sc_parent, isrc, res, data));
 118 }
 119
 120 static void
 121 omap4_wugen_pre_ithread(device_t dev, struct intr_irqsrc *isrc)
 122 {
 123         struct omap4_wugen_sc *sc = device_get_softc(dev);
 124
 125         PIC_PRE_ITHREAD(sc->sc_parent, isrc);
 126 }
 127
 128
 129 static void
 130 omap4_wugen_post_ithread(device_t dev, struct intr_irqsrc *isrc)
 131 {
 132         struct omap4_wugen_sc *sc = device_get_softc(dev);
 133
 134         PIC_POST_ITHREAD(sc->sc_parent, isrc);
 135 }
 136
 137 static void
 138 omap4_wugen_post_filter(device_t dev, struct intr_irqsrc *isrc)
 139 {
 140         struct omap4_wugen_sc *sc = device_get_softc(dev);
 141
 142         PIC_POST_FILTER(sc->sc_parent, isrc);
 143 }
 144
 145 #ifdef SMP
 146 static int
 147 omap4_wugen_bind_intr(device_t dev, struct intr_irqsrc *isrc)
 148 {
 149         struct omap4_wugen_sc *sc = device_get_softc(dev);
 150
 151         return (PIC_BIND_INTR(sc->sc_parent, isrc));
 152 }
 153 #endif
 154
 155 static int
 156 omap4_wugen_probe(device_t dev)
 157 {
 158
 159         if (!ofw_bus_status_okay(dev))
 160                 return (ENXIO);
 161
 162         if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
 163                 return (ENXIO);
 164
 165         return (BUS_PROBE_DEFAULT);
 166 }
 167
 168 static int
 169 omap4_wugen_detach(device_t dev)
 170 {
 171         struct omap4_wugen_sc *sc;
 172
 173         sc = device_get_softc(dev);
 174         if (sc->sc_mem_res != NULL) {
 175                 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res);
 176                 sc->sc_mem_res = NULL;
 177         }
 178         return (0);
 179 }
 180
 181 static int
 182 omap4_wugen_attach(device_t dev)
 183 {
 184         struct omap4_wugen_sc *sc;
 185         phandle_t node;
 186         phandle_t parent_xref;
 187         int rid, rv;
 188
 189         sc = device_get_softc(dev);
 190         sc->sc_dev = dev;
 191         node = ofw_bus_get_node(dev);
 192
 193         rv = OF_getencprop(node, "interrupt-parent", &parent_xref,
 194             sizeof(parent_xref));
 195         if (rv <= 0) {
 196                 device_printf(dev, "can't read parent node property\n");
 197                 goto fail;
 198         }
 199         sc->sc_parent = OF_device_from_xref(parent_xref);
 200         if (sc->sc_parent == NULL) {
 201                 device_printf(dev, "can't find parent controller\n");
 202                 goto fail;
 203         }
 204
 205         rid = 0;
 206         sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
 207             RF_ACTIVE);
 208         if (sc->sc_mem_res == NULL) {
 209                 device_printf(dev, "can't allocate resources\n");
 210                 return (ENXIO);
 211         }
 212
 213         if (intr_pic_register(dev, OF_xref_from_node(node)) == NULL) {
 214                 device_printf(dev, "can't register PIC\n");
 215                 goto fail;
 216         }
 217         return (0);
 218
 219 fail:
 220         omap4_wugen_detach(dev);
 221         return (ENXIO);
 222 }
 223
 224 static device_method_t omap4_wugen_methods[] = {
 225         DEVMETHOD(device_probe,         omap4_wugen_probe),
 226         DEVMETHOD(device_attach,        omap4_wugen_attach),
 227         DEVMETHOD(device_detach,        omap4_wugen_detach),
 228
 229         /* Interrupt controller interface */
 230         DEVMETHOD(pic_activate_intr,    omap4_wugen_activate_intr),
 231         DEVMETHOD(pic_disable_intr,     omap4_wugen_disable_intr),
 232         DEVMETHOD(pic_enable_intr,      omap4_wugen_enable_intr),
 233         DEVMETHOD(pic_map_intr,         omap4_wugen_map_intr),
 234         DEVMETHOD(pic_deactivate_intr,  omap4_wugen_deactivate_intr),
 235         DEVMETHOD(pic_setup_intr,       omap4_wugen_setup_intr),
 236         DEVMETHOD(pic_teardown_intr,    omap4_wugen_teardown_intr),
 237         DEVMETHOD(pic_pre_ithread,      omap4_wugen_pre_ithread),
 238         DEVMETHOD(pic_post_ithread,     omap4_wugen_post_ithread),
 239         DEVMETHOD(pic_post_filter,      omap4_wugen_post_filter),
 240 #ifdef SMP
 241         DEVMETHOD(pic_bind_intr,        omap4_wugen_bind_intr),
 242 #endif
 243         DEVMETHOD_END
 244 };
 245 devclass_t omap4_wugen_devclass;
 246 DEFINE_CLASS_0(omap4_wugen, omap4_wugen_driver, omap4_wugen_methods,
 247     sizeof(struct omap4_wugen_sc));
 248 EARLY_DRIVER_MODULE(omap4_wugen, simplebus, omap4_wugen_driver,
 249     omap4_wugen_devclass, NULL, NULL,
 250     BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE + 1);