The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/arm/ti/ti_scm.c

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    1 /*-
    2  * Copyright (c) 2019 Emmanuel Vadot <manu@FreeBSD.org>
    3  *
    4  * Copyright (c) 2020 Oskar Holmlund <oskar.holmlund@ohdata.se>
    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 ``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  * $FreeBSD$
   28  */
   29 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD$");
   32 
   33 /* Based on sys/arm/ti/ti_sysc.c */
   34 
   35 #include <sys/param.h>
   36 #include <sys/systm.h>
   37 #include <sys/bus.h>
   38 #include <sys/fbio.h>
   39 #include <sys/kernel.h>
   40 #include <sys/module.h>
   41 #include <sys/rman.h>
   42 #include <sys/resource.h>
   43 #include <machine/bus.h>
   44 #include <vm/vm.h>
   45 #include <vm/vm_extern.h>
   46 #include <vm/vm_kern.h>
   47 #include <vm/pmap.h>
   48 
   49 #include <dev/fdt/simplebus.h>
   50 
   51 #include <dev/ofw/ofw_bus.h>
   52 #include <dev/ofw/ofw_bus_subr.h>
   53 
   54 #define TI_AM3_SCM                      14
   55 #define TI_AM4_SCM                      13
   56 #define TI_DM814_SCRM                   12
   57 #define TI_DM816_SCRM                   11
   58 #define TI_OMAP2_SCM                    10
   59 #define TI_OMAP3_SCM                    9
   60 #define TI_OMAP4_SCM_CORE               8
   61 #define TI_OMAP4_SCM_PADCONF_CORE       7
   62 #define TI_OMAP4_SCM_WKUP               6
   63 #define TI_OMAP4_SCM_PADCONF_WKUP       5
   64 #define TI_OMAP5_SCM_CORE               4
   65 #define TI_OMAP5_SCM_PADCONF_CORE       3
   66 #define TI_OMAP5_SCM_WKUP_PAD_CONF      2
   67 #define TI_DRA7_SCM_CORE                1
   68 #define TI_SCM_END                      0
   69 
   70 static struct ofw_compat_data compat_data[] = {
   71         { "ti,am3-scm",                 TI_AM3_SCM },
   72         { "ti,am4-scm",                 TI_AM4_SCM },
   73         { "ti,dm814-scrm",              TI_DM814_SCRM },
   74         { "ti,dm816-scrm",              TI_DM816_SCRM },
   75         { "ti,omap2-scm",               TI_OMAP2_SCM },
   76         { "ti,omap3-scm",               TI_OMAP3_SCM },
   77         { "ti,omap4-scm-core",          TI_OMAP4_SCM_CORE },
   78         { "ti,omap4-scm-padconf-core",  TI_OMAP4_SCM_PADCONF_CORE },
   79         { "ti,omap4-scm-wkup",          TI_OMAP4_SCM_WKUP },
   80         { "ti,omap4-scm-padconf-wkup",  TI_OMAP4_SCM_PADCONF_WKUP },
   81         { "ti,omap5-scm-core",          TI_OMAP5_SCM_CORE },
   82         { "ti,omap5-scm-padconf-core",  TI_OMAP5_SCM_PADCONF_CORE },
   83         { "ti,omap5-scm-wkup-pad-conf", TI_OMAP5_SCM_WKUP_PAD_CONF },
   84         { "ti,dra7-scm-core",           TI_DRA7_SCM_CORE },
   85         { NULL,                         TI_SCM_END }
   86 };
   87 
   88 struct ti_scm_softc {
   89         struct simplebus_softc  sc;
   90         device_t                dev;
   91 };
   92 
   93 static int ti_scm_probe(device_t dev);
   94 static int ti_scm_attach(device_t dev);
   95 static int ti_scm_detach(device_t dev);
   96 
   97 static int
   98 ti_scm_probe(device_t dev)
   99 {
  100         if (!ofw_bus_status_okay(dev))
  101                 return (ENXIO);
  102 
  103         if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
  104                 return (ENXIO);
  105 
  106         device_set_desc(dev, "TI OMAP Control Module");
  107 
  108         return (BUS_PROBE_DEFAULT);
  109 }
  110 
  111 static int
  112 ti_scm_attach(device_t dev)
  113 {
  114         struct ti_scm_softc *sc;
  115         device_t cdev;
  116         phandle_t node, child;
  117 
  118         sc = device_get_softc(dev);
  119         sc->dev = dev;
  120         node = ofw_bus_get_node(dev);
  121 
  122         simplebus_init(dev, node);
  123         if (simplebus_fill_ranges(node, &sc->sc) < 0) {
  124                 device_printf(dev, "could not get ranges\n");
  125                 return (ENXIO);
  126         }
  127 
  128         for (child = OF_child(node); child > 0; child = OF_peer(child)) {
  129                 cdev = simplebus_add_device(dev, child, 0, NULL, -1, NULL);
  130                 if (cdev != NULL)
  131                         device_probe_and_attach(cdev);
  132         }
  133 
  134         return (bus_generic_attach(dev));
  135 }
  136 
  137 static int
  138 ti_scm_detach(device_t dev)
  139 {
  140         return (EBUSY);
  141 }
  142 
  143 static device_method_t ti_scm_methods[] = {
  144         /* Device interface */
  145         DEVMETHOD(device_probe,         ti_scm_probe),
  146         DEVMETHOD(device_attach,        ti_scm_attach),
  147         DEVMETHOD(device_detach,        ti_scm_detach),
  148 
  149         DEVMETHOD_END
  150 };
  151 
  152 DEFINE_CLASS_1(ti_scm, ti_scm_driver, ti_scm_methods,
  153     sizeof(struct ti_scm_softc), simplebus_driver);
  154 
  155 EARLY_DRIVER_MODULE(ti_scm, simplebus, ti_scm_driver, 0, 0,
  156     BUS_PASS_BUS + BUS_PASS_ORDER_FIRST);
  157 MODULE_VERSION(ti_scm, 1);
  158 MODULE_DEPEND(ti_scm, ti_sysc, 1, 1, 1);

Cache object: ca0f7cbc516c80d776c378bd90e68472


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