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 static void
 129 omap4_wugen_post_ithread(device_t dev, struct intr_irqsrc *isrc)
 130 {
 131         struct omap4_wugen_sc *sc = device_get_softc(dev);
 132
 133         PIC_POST_ITHREAD(sc->sc_parent, isrc);
 134 }
 135
 136 static void
 137 omap4_wugen_post_filter(device_t dev, struct intr_irqsrc *isrc)
 138 {
 139         struct omap4_wugen_sc *sc = device_get_softc(dev);
 140
 141         PIC_POST_FILTER(sc->sc_parent, isrc);
 142 }
 143
 144 #ifdef SMP
 145 static int
 146 omap4_wugen_bind_intr(device_t dev, struct intr_irqsrc *isrc)
 147 {
 148         struct omap4_wugen_sc *sc = device_get_softc(dev);
 149
 150         return (PIC_BIND_INTR(sc->sc_parent, isrc));
 151 }
 152 #endif
 153
 154 static int
 155 omap4_wugen_probe(device_t dev)
 156 {
 157
 158         if (!ofw_bus_status_okay(dev))
 159                 return (ENXIO);
 160
 161         if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
 162                 return (ENXIO);
 163
 164         return (BUS_PROBE_DEFAULT);
 165 }
 166
 167 static int
 168 omap4_wugen_detach(device_t dev)
 169 {
 170         struct omap4_wugen_sc *sc;
 171
 172         sc = device_get_softc(dev);
 173         if (sc->sc_mem_res != NULL) {
 174                 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res);
 175                 sc->sc_mem_res = NULL;
 176         }
 177         return (0);
 178 }
 179
 180 static int
 181 omap4_wugen_attach(device_t dev)
 182 {
 183         struct omap4_wugen_sc *sc;
 184         phandle_t node;
 185         phandle_t parent_xref;
 186         int rid, rv;
 187
 188         sc = device_get_softc(dev);
 189         sc->sc_dev = dev;
 190         node = ofw_bus_get_node(dev);
 191
 192         rv = OF_getencprop(node, "interrupt-parent", &parent_xref,
 193             sizeof(parent_xref));
 194         if (rv <= 0) {
 195                 device_printf(dev, "can't read parent node property\n");
 196                 goto fail;
 197         }
 198         sc->sc_parent = OF_device_from_xref(parent_xref);
 199         if (sc->sc_parent == NULL) {
 200                 device_printf(dev, "can't find parent controller\n");
 201                 goto fail;
 202         }
 203
 204         rid = 0;
 205         sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
 206             RF_ACTIVE);
 207         if (sc->sc_mem_res == NULL) {
 208                 device_printf(dev, "can't allocate resources\n");
 209                 return (ENXIO);
 210         }
 211
 212         if (intr_pic_register(dev, OF_xref_from_node(node)) == NULL) {
 213                 device_printf(dev, "can't register PIC\n");
 214                 goto fail;
 215         }
 216         return (0);
 217
 218 fail:
 219         omap4_wugen_detach(dev);
 220         return (ENXIO);
 221 }
 222
 223 static device_method_t omap4_wugen_methods[] = {
 224         DEVMETHOD(device_probe,         omap4_wugen_probe),
 225         DEVMETHOD(device_attach,        omap4_wugen_attach),
 226         DEVMETHOD(device_detach,        omap4_wugen_detach),
 227
 228         /* Interrupt controller interface */
 229         DEVMETHOD(pic_activate_intr,    omap4_wugen_activate_intr),
 230         DEVMETHOD(pic_disable_intr,     omap4_wugen_disable_intr),
 231         DEVMETHOD(pic_enable_intr,      omap4_wugen_enable_intr),
 232         DEVMETHOD(pic_map_intr,         omap4_wugen_map_intr),
 233         DEVMETHOD(pic_deactivate_intr,  omap4_wugen_deactivate_intr),
 234         DEVMETHOD(pic_setup_intr,       omap4_wugen_setup_intr),
 235         DEVMETHOD(pic_teardown_intr,    omap4_wugen_teardown_intr),
 236         DEVMETHOD(pic_pre_ithread,      omap4_wugen_pre_ithread),
 237         DEVMETHOD(pic_post_ithread,     omap4_wugen_post_ithread),
 238         DEVMETHOD(pic_post_filter,      omap4_wugen_post_filter),
 239 #ifdef SMP
 240         DEVMETHOD(pic_bind_intr,        omap4_wugen_bind_intr),
 241 #endif
 242         DEVMETHOD_END
 243 };
 244
 245 DEFINE_CLASS_0(omap4_wugen, omap4_wugen_driver, omap4_wugen_methods,
 246     sizeof(struct omap4_wugen_sc));
 247 EARLY_DRIVER_MODULE(omap4_wugen, simplebus, omap4_wugen_driver, NULL, NULL,
 248     BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE + 1);