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/mv/obio.c

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    1 /*-
    2  * Copyright (c) 2006 Benno Rice.  All rights reserved.
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions
    6  * are met:
    7  * 1. Redistributions of source code must retain the above copyright
    8  *    notice, this list of conditions and the following disclaimer.
    9  * 2. Redistributions in binary form must reproduce the above copyright
   10  *    notice, this list of conditions and the following disclaimer in the
   11  *    documentation and/or other materials provided with the distribution.
   12  *
   13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   14  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   15  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   16  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   17  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   18  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   19  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   20  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   22  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   23  *
   24  * from: FreeBSD: //depot/projects/arm/src/sys/arm/xscale/pxa2x0/pxa2x0_obio.c, rev 1
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/8.1/sys/arm/mv/obio.c 186909 2009-01-08 18:31:43Z raj $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/bus.h>
   33 #include <sys/kernel.h>
   34 #include <sys/module.h>
   35 #include <sys/malloc.h>
   36 #include <sys/rman.h>
   37 #include <machine/bus.h>
   38 #include <machine/intr.h>
   39 
   40 #include <arm/mv/mvvar.h>
   41 #include <arm/mv/mvreg.h>
   42 
   43 static void mbus_identify(driver_t *, device_t);
   44 static int mbus_probe(device_t);
   45 static int mbus_attach(device_t);
   46 
   47 static void
   48 mbus_identify(driver_t *driver, device_t parent)
   49 {
   50 
   51         BUS_ADD_CHILD(parent, 0, "mbus", 0);
   52 }
   53 
   54 static int
   55 mbus_probe(device_t dev)
   56 {
   57 
   58         device_set_desc(dev, "Marvell Internal Bus (Mbus)");
   59         return (0);
   60 }
   61 
   62 static int
   63 mbus_attach(device_t dev)
   64 {
   65         struct obio_softc *sc;
   66         struct obio_device *od;
   67         int i;
   68         device_t child;
   69 
   70         sc = device_get_softc(dev);
   71 
   72         sc->obio_bst = obio_tag;
   73 
   74         sc->obio_mem.rm_type = RMAN_ARRAY;
   75         sc->obio_mem.rm_descr = "Marvell OBIO Memory";
   76         if (rman_init(&sc->obio_mem) != 0)
   77                 panic("mbus_attach: failed to init obio mem rman");
   78         if (rman_manage_region(&sc->obio_mem, 0, ~0) != 0)
   79                 panic("mbus_attach: failed to set up obio mem rman");
   80 
   81         sc->obio_irq.rm_type = RMAN_ARRAY;
   82         sc->obio_irq.rm_descr = "Marvell OBIO IRQ";
   83         if (rman_init(&sc->obio_irq) != 0)
   84                 panic("mbus_attach: failed to init obio irq rman");
   85         if (rman_manage_region(&sc->obio_irq, 0, NIRQ - 1) != 0)
   86                 panic("mbus_attach: failed to set up obio irq rman");
   87 
   88         sc->obio_gpio.rm_type = RMAN_ARRAY;
   89         sc->obio_gpio.rm_descr = "Marvell GPIO";
   90         if (rman_init(&sc->obio_gpio) != 0)
   91                 panic("mbus_attach: failed to init gpio rman");
   92         if (rman_manage_region(&sc->obio_gpio, 0, MV_GPIO_MAX_NPINS - 1) != 0)
   93                 panic("mbus_attach: failed to set up gpio rman");
   94 
   95         for (od = obio_devices; od->od_name != NULL; od++) {
   96                 if (soc_power_ctrl_get(od->od_pwr_mask) != od->od_pwr_mask)
   97                         continue;
   98 
   99                 resource_list_init(&od->od_resources);
  100 
  101                 resource_list_add(&od->od_resources, SYS_RES_MEMORY, 0,
  102                     od->od_base, od->od_base + od->od_size - 1, od->od_size);
  103 
  104                 for (i = 0; od->od_irqs[i] != -1; i++) {
  105                         resource_list_add(&od->od_resources, SYS_RES_IRQ, i,
  106                             od->od_irqs[i], od->od_irqs[i], 1);
  107                 }
  108 
  109                 for (i = 0; od->od_gpio[i] != -1; i++) {
  110                         resource_list_add(&od->od_resources, SYS_RES_GPIO, i,
  111                             od->od_gpio[i], od->od_gpio[i], 1);
  112                 }
  113 
  114                 child = device_add_child(dev, od->od_name, -1);
  115                 device_set_ivars(child, od);
  116         }
  117 
  118         bus_generic_probe(dev);
  119         bus_generic_attach(dev);
  120 
  121         return (0);
  122 }
  123 
  124 static int
  125 mbus_print_child(device_t dev, device_t child)
  126 {
  127         struct obio_device *od;
  128         int rv;
  129 
  130         od = (struct obio_device *)device_get_ivars(child);
  131         if (od == NULL)
  132                 panic("Unknown device on %s", device_get_nameunit(dev));
  133 
  134         rv = bus_print_child_header(dev, child);
  135 
  136         rv += resource_list_print_type(&od->od_resources, "at mem",
  137             SYS_RES_MEMORY, "0x%08lx");
  138         rv += resource_list_print_type(&od->od_resources, "irq",
  139             SYS_RES_IRQ, "%ld");
  140         rv += resource_list_print_type(&od->od_resources, "gpio",
  141             SYS_RES_GPIO, "%ld");
  142 
  143         if (device_get_flags(child))
  144                 rv += printf(" flags %#x", device_get_flags(child));
  145         rv += bus_print_child_footer(dev, child);
  146 
  147         return (rv);
  148 }
  149 
  150 static int
  151 mbus_setup_intr(device_t dev, device_t child, struct resource *ires, int flags,
  152     driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep)
  153 {
  154         struct obio_softc *sc;
  155         int error;
  156 
  157         sc = (struct obio_softc *)device_get_softc(dev);
  158 
  159         if (rman_is_region_manager(ires, &sc->obio_gpio)) {
  160                 error = mv_gpio_setup_intrhandler(
  161                     device_get_nameunit(child), filt, intr, arg,
  162                     rman_get_start(ires), flags, cookiep);
  163 
  164                 if (error != 0)
  165                         return (error);
  166 
  167                 mv_gpio_intr_unmask(rman_get_start(ires));
  168                 return (0);
  169         }
  170 
  171         BUS_SETUP_INTR(device_get_parent(dev), child, ires, flags, filt, intr, arg,
  172             cookiep);
  173         arm_unmask_irq(rman_get_start(ires));
  174         return (0);
  175 }
  176 
  177 static int
  178 mbus_teardown_intr(device_t dev, device_t child, struct resource *ires, void *cookie)
  179 {
  180 
  181         return (BUS_TEARDOWN_INTR(device_get_parent(dev), child, ires, cookie));
  182 }
  183 
  184 static int
  185 mbus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
  186 {
  187         struct obio_device *od;
  188 
  189         od = (struct obio_device *)device_get_ivars(child);
  190 
  191         switch (which) {
  192         case MBUS_IVAR_BASE:
  193                 *((u_long *)result) = od->od_base;
  194                 break;
  195 
  196         default:
  197                 return (ENOENT);
  198         }
  199 
  200         return (0);
  201 }
  202 
  203 static struct resource_list *
  204 mbus_get_resource_list(device_t dev, device_t child)
  205 {
  206         struct obio_device *od;
  207 
  208         od = (struct obio_device *)device_get_ivars(child);
  209 
  210         if (od == NULL)
  211                 return (NULL);
  212 
  213         return (&od->od_resources);
  214 }
  215 
  216 static struct resource *
  217 mbus_alloc_resource(device_t dev, device_t child, int type, int *rid,
  218     u_long start, u_long end, u_long count, u_int flags)
  219 {
  220         struct obio_softc *sc;
  221         struct obio_device *od;
  222         struct resource *rv;
  223         struct resource_list *rl;
  224         struct resource_list_entry *rle = NULL;
  225         struct rman *rm;
  226         int needactivate;
  227 
  228         sc = (struct obio_softc *)device_get_softc(dev);
  229 
  230         if (type == SYS_RES_IRQ && IS_GPIO_IRQ(start)) {
  231                 type = SYS_RES_GPIO;
  232                 start = IRQ2GPIO(start);
  233         }
  234 
  235         switch (type) {
  236         case SYS_RES_IRQ:
  237                 rm = &sc->obio_irq;
  238                 break;
  239         case SYS_RES_MEMORY:
  240                 rm = &sc->obio_mem;
  241                 break;
  242         case SYS_RES_GPIO:
  243                 rm = &sc->obio_gpio;
  244                 break;
  245         default:
  246                 return (NULL);
  247         }
  248 
  249         if (device_get_parent(child) == dev) {
  250                 od = (struct obio_device *)device_get_ivars(child);
  251                 rl = &od->od_resources;
  252                 rle = resource_list_find(rl, type, *rid);
  253 
  254                 if (rle->res != NULL)
  255                         panic("mbus_alloc_resource: resource is busy");
  256         }
  257 
  258         if (rle) {
  259                 start = rle->start;
  260                 end = rle->end;
  261                 count = rle->count;
  262         }
  263 
  264         needactivate = flags & RF_ACTIVE;
  265         flags &= ~RF_ACTIVE;
  266         rv = rman_reserve_resource(rm, start, end, count, flags, child);
  267 
  268         if (rv == NULL)
  269                 return (NULL);
  270 
  271         if (rle)
  272                 rle->res = rv;
  273 
  274         rman_set_rid(rv, *rid);
  275 
  276         if (type == SYS_RES_MEMORY) {
  277                 rman_set_bustag(rv, sc->obio_bst);
  278                 rman_set_bushandle(rv, start);
  279         }
  280 
  281         if (needactivate)
  282                 if (bus_activate_resource(child, type, *rid, rv)) {
  283                         rman_release_resource(rv);
  284                         return (NULL);
  285                 }
  286 
  287         return (rv);
  288 }
  289 
  290 static int
  291 mbus_release_resource(device_t dev, device_t child, int type, int rid,
  292     struct resource *r)
  293 {
  294         struct obio_device *od;
  295         struct resource_list *rl;
  296         struct resource_list_entry *rle;
  297 
  298         if (device_get_parent(child) == dev) {
  299                 od = (struct obio_device *)device_get_ivars(child);
  300                 rl = &od->od_resources;
  301                 rle = resource_list_find(rl, type, rid);
  302 
  303                 if (!rle)
  304                         panic("mbus_release_resource: can't find resource");
  305 
  306                 if (!rle->res)
  307                         panic("mbus_release_resource: resource entry is not busy");
  308 
  309                 r = rle->res;
  310                 rle->res = NULL;
  311         }
  312 
  313         rman_release_resource(r);
  314 
  315         return (0);
  316 }
  317 
  318 static int
  319 mbus_activate_resource(device_t dev, device_t child, int type, int rid,
  320     struct resource *r)
  321 {
  322 
  323         return (rman_activate_resource(r));
  324 }
  325 
  326 static device_t
  327 mbus_add_child(device_t bus, int order, const char *name, int unit)
  328 {
  329         struct obio_device *od;
  330         device_t child;
  331 
  332         od = malloc(sizeof(struct obio_device), M_DEVBUF, M_NOWAIT | M_ZERO);
  333         if (!od)
  334                 return (0);
  335 
  336         resource_list_init(&od->od_resources);
  337         od->od_name = name;
  338 
  339         child = device_add_child_ordered(bus, order, name, unit);
  340         device_set_ivars(child, od);
  341 
  342         return (child);
  343 }
  344 
  345 static device_method_t mbus_methods[] = {
  346         DEVMETHOD(device_identify,      mbus_identify),
  347         DEVMETHOD(device_probe,         mbus_probe),
  348         DEVMETHOD(device_attach,        mbus_attach),
  349 
  350         DEVMETHOD(bus_add_child,        mbus_add_child),
  351         DEVMETHOD(bus_print_child,      mbus_print_child),
  352 
  353         DEVMETHOD(bus_read_ivar,        mbus_read_ivar),
  354         DEVMETHOD(bus_setup_intr,       mbus_setup_intr),
  355         DEVMETHOD(bus_teardown_intr,    mbus_teardown_intr),
  356 
  357         DEVMETHOD(bus_set_resource,             bus_generic_rl_set_resource),
  358         DEVMETHOD(bus_get_resource_list,        mbus_get_resource_list),
  359         DEVMETHOD(bus_alloc_resource,           mbus_alloc_resource),
  360         DEVMETHOD(bus_release_resource,         mbus_release_resource),
  361         DEVMETHOD(bus_activate_resource,        mbus_activate_resource),
  362 
  363         {0, 0}
  364 };
  365 
  366 static driver_t mbus_driver = {
  367         "mbus",
  368         mbus_methods,
  369         sizeof(struct obio_softc),
  370 };
  371 
  372 static devclass_t mbus_devclass;
  373 
  374 DRIVER_MODULE(mbus, nexus, mbus_driver, mbus_devclass, 0, 0);

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