sys/arm/ti/ti_scm.c

   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 static devclass_t ti_scm_devclass;
 156
 157 EARLY_DRIVER_MODULE(ti_scm, simplebus, ti_scm_driver,
 158     ti_scm_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_FIRST);
 159 MODULE_VERSION(ti_scm, 1);
 160 MODULE_DEPEND(ti_scm, ti_sysc, 1, 1, 1);