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/sparc64/isa/isa.c

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    1 /*-
    2  * Copyright (c) 1998 Doug Rabson
    3  * Copyright (c) 2001 Thomas Moestl <tmm@FreeBSD.org>
    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  *      from: FreeBSD: src/sys/alpha/isa/isa.c,v 1.26 2001/07/11
   28  */
   29 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD: releng/9.0/sys/sparc64/isa/isa.c 221526 2011-05-06 13:48:53Z jhb $");
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 #include <sys/bus.h>
   36 
   37 #include <machine/bus.h>
   38 
   39 #include <sys/rman.h>
   40 
   41 #include <isa/isareg.h>
   42 #include <isa/isavar.h>
   43 #include <isa/isa_common.h>
   44 
   45 #include <dev/ofw/ofw_bus.h>
   46 #include <dev/ofw/openfirm.h>
   47 
   48 #include <machine/resource.h>
   49 
   50 #include <dev/pci/pcireg.h>
   51 #include <dev/pci/pcivar.h>
   52 
   53 #include <sparc64/pci/ofw_pci.h>
   54 #include <sparc64/isa/ofw_isa.h>
   55 
   56 /* There can be only one ISA bus, so it is safe to use globals. */
   57 static u_int64_t isa_io_base;
   58 static u_int64_t isa_io_limit;
   59 static u_int64_t isa_mem_base;
   60 static u_int64_t isa_mem_limit;
   61 
   62 device_t isa_bus_device;
   63 
   64 static phandle_t isab_node;
   65 static struct isa_ranges *isab_ranges;
   66 static int isab_nrange;
   67 static struct ofw_bus_iinfo isa_iinfo;
   68 
   69 /*
   70  * XXX: This is really partly PCI-specific, but unfortunately is
   71  * differently enough to have to duplicate it here...
   72  */
   73 #define ISAB_RANGE_PHYS(r)                                              \
   74         (((u_int64_t)(r)->phys_mid << 32) | (u_int64_t)(r)->phys_lo)
   75 #define ISAB_RANGE_SPACE(r)     (((r)->phys_hi >> 24) & 0x03)
   76 
   77 #define ISAR_SPACE_IO           0x01
   78 #define ISAR_SPACE_MEM          0x02
   79 
   80 #define INRANGE(x, start, end)  ((x) >= (start) && (x) <= (end))
   81 
   82 static void     isa_setup_children(device_t, phandle_t);
   83 
   84 void
   85 isa_init(device_t dev)
   86 {
   87         device_t bridge;
   88         int i;
   89 
   90         /* The parent of the bus must be a PCI-ISA bridge. */
   91         bridge = device_get_parent(dev);
   92         isab_node = ofw_bus_get_node(bridge);
   93         isab_nrange = OF_getprop_alloc(isab_node, "ranges",
   94             sizeof(*isab_ranges), (void **)&isab_ranges);
   95         if (isab_nrange <= 0)
   96                 panic("isa_init: cannot get bridge range property");
   97 
   98         ofw_bus_setup_iinfo(isab_node, &isa_iinfo, sizeof(ofw_isa_intr_t));
   99 
  100         isa_setup_children(dev, isab_node);
  101 
  102         for (i = isab_nrange - 1; i >= 0; i--) {
  103                 switch(ISAB_RANGE_SPACE(&isab_ranges[i])) {
  104                 case ISAR_SPACE_IO:
  105                         /* This is probably always 0. */
  106                         isa_io_base = ISAB_RANGE_PHYS(&isab_ranges[i]);
  107                         isa_io_limit = isab_ranges[i].size;
  108                         break;
  109                 case ISAR_SPACE_MEM:
  110                         /* This is probably always 0. */
  111                         isa_mem_base = ISAB_RANGE_PHYS(&isab_ranges[i]);
  112                         isa_mem_limit = isab_ranges[i].size;
  113                         break;
  114                 }
  115         }
  116 }
  117 
  118 static const struct {
  119         const char      *const name;
  120         uint32_t        id;
  121 } const ofw_isa_pnp_map[] = {
  122         { "SUNW,lomh",  0x0000ae4e }, /* SUN0000 */
  123         { "dma",        0x0002d041 }, /* PNP0200 */
  124         { "floppy",     0x0007d041 }, /* PNP0700 */
  125         { "rtc",        0x000bd041 }, /* PNP0B00 */
  126         { "flashprom",  0x0100ae4e }, /* SUN0001 */
  127         { "parallel",   0x0104d041 }, /* PNP0401 */
  128         { "serial",     0x0105d041 }, /* PNP0501 */
  129         { "su",         0x0105d041 }, /* PNP0501 */
  130         { "i2c",        0x0200ae4e }, /* SUN0002 */
  131         { "rmc-comm",   0x0300ae4e }, /* SUN0003 */
  132         { "kb_ps2",     0x0303d041 }, /* PNP0303 */
  133         { "kdmouse",    0x030fd041 }, /* PNP0F03 */
  134         { "bscbus",     0x0400ae4e }, /* SUN0004 */
  135         { "power",      0x0c0cd041 }, /* PNP0C0C */
  136         { NULL,         0x0 }
  137 };
  138 
  139 static void
  140 isa_setup_children(device_t dev, phandle_t parent)
  141 {
  142         struct isa_regs *regs;
  143         struct resource_list *rl;
  144         device_t cdev;
  145         u_int64_t end, start;
  146         ofw_isa_intr_t *intrs, rintr;
  147         phandle_t node;
  148         uint32_t *drqs, *regidx;
  149         int i, ndrq, nintr, nreg, nregidx, rid, rtype;
  150         char *name;
  151 
  152         /*
  153          * Loop through children and fake up PnP devices for them.
  154          * Their resources are added as fully mapped and specified because
  155          * adjusting the resources and the resource list entries respectively
  156          * in isa_alloc_resource() causes trouble with drivers which use
  157          * rman_get_start(), pass-through or allocate and release resources
  158          * multiple times, etc. Adjusting the resources might be better off
  159          * in a bus_activate_resource method but the common ISA code doesn't
  160          * allow for an isa_activate_resource().
  161          */
  162         for (node = OF_child(parent); node != 0; node = OF_peer(node)) {
  163                 if ((OF_getprop_alloc(node, "name", 1, (void **)&name)) == -1)
  164                         continue;
  165 
  166                 /*
  167                  * Keyboard and mouse controllers hang off of the `8042'
  168                  * node but we have no real use for the `8042' itself.
  169                  */
  170                 if (strcmp(name, "8042") == 0) {
  171                         isa_setup_children(dev, node);
  172                         free(name, M_OFWPROP);
  173                         continue;
  174                 }
  175 
  176                 for (i = 0; ofw_isa_pnp_map[i].name != NULL; i++)
  177                         if (strcmp(ofw_isa_pnp_map[i].name, name) == 0)
  178                                 break;
  179                 if (ofw_isa_pnp_map[i].name == NULL) {
  180                         device_printf(dev, "no PnP map entry for node "
  181                             "0x%lx: %s\n", (unsigned long)node, name);
  182                         free(name, M_OFWPROP);
  183                         continue;
  184                 }
  185 
  186                 if ((cdev = BUS_ADD_CHILD(dev, ISA_ORDER_PNPBIOS, NULL, -1)) ==
  187                     NULL)
  188                         panic("isa_setup_children: BUS_ADD_CHILD failed");
  189                 isa_set_logicalid(cdev, ofw_isa_pnp_map[i].id);
  190                 isa_set_vendorid(cdev, ofw_isa_pnp_map[i].id);
  191 
  192                 rl = BUS_GET_RESOURCE_LIST(dev, cdev);
  193                 nreg = OF_getprop_alloc(node, "reg", sizeof(*regs),
  194                     (void **)&regs);
  195                 for (i = 0; i < nreg; i++) {
  196                         start = ISA_REG_PHYS(&regs[i]);
  197                         end = start + regs[i].size - 1;
  198                         rtype = ofw_isa_range_map(isab_ranges, isab_nrange,
  199                             &start, &end, NULL);
  200                         rid = 0;
  201                         while (resource_list_find(rl, rtype, rid) != NULL)
  202                                 rid++;
  203                         bus_set_resource(cdev, rtype, rid, start,
  204                             end - start + 1);
  205                 }
  206                 if (nreg == -1 && parent != isab_node) {
  207                         /*
  208                          * The "reg" property still might be an index into
  209                          * the set of registers of the parent device like
  210                          * with the nodes hanging off of the `8042' node.
  211                          */
  212                         nregidx = OF_getprop_alloc(node, "reg", sizeof(*regidx),
  213                             (void **)&regidx);
  214                         if (nregidx > 2)
  215                                 panic("isa_setup_children: impossible number "
  216                                     "of register indices");
  217                         if (nregidx != -1 && (nreg = OF_getprop_alloc(parent,
  218                             "reg", sizeof(*regs), (void **)&regs)) >= nregidx) {
  219                                 for (i = 0; i < nregidx; i++) {
  220                                         start = ISA_REG_PHYS(&regs[regidx[i]]);
  221                                         end = start + regs[regidx[i]].size - 1;
  222                                         rtype = ofw_isa_range_map(isab_ranges,
  223                                             isab_nrange, &start, &end, NULL);
  224                                         rid = 0;
  225                                         while (resource_list_find(rl, rtype,
  226                                             rid) != NULL)
  227                                                 rid++;
  228                                         bus_set_resource(cdev, rtype, rid,
  229                                             start, end - start + 1);
  230                                 }
  231                         }
  232                         if (regidx != NULL)
  233                                 free(regidx, M_OFWPROP);
  234                 }
  235                 if (regs != NULL)
  236                         free(regs, M_OFWPROP);
  237 
  238                 nintr = OF_getprop_alloc(node, "interrupts", sizeof(*intrs),
  239                     (void **)&intrs);
  240                 for (i = 0; i < nintr; i++) {
  241                         if (intrs[i] > 7)
  242                                 panic("isa_setup_children: intr too large");
  243                         rintr = ofw_isa_route_intr(device_get_parent(dev), node,
  244                             &isa_iinfo, intrs[i]);
  245                         if (rintr == PCI_INVALID_IRQ) {
  246                                 device_printf(dev, "could not map ISA "
  247                                     "interrupt %d for node 0x%lx: %s\n",
  248                                     intrs[i], (unsigned long)node, name);
  249                                 continue;
  250                         }
  251                         bus_set_resource(cdev, SYS_RES_IRQ, i, rintr, 1);
  252                 }
  253                 if (intrs != NULL)
  254                         free(intrs, M_OFWPROP);
  255 
  256                 ndrq = OF_getprop_alloc(node, "dma-channel", sizeof(*drqs),
  257                     (void **)&drqs);
  258                 for (i = 0; i < ndrq; i++)
  259                         bus_set_resource(cdev, SYS_RES_DRQ, i, drqs[i], 1);
  260                 if (drqs != NULL)
  261                         free(drqs, M_OFWPROP);
  262 
  263                 /*
  264                  * Devices using DMA hang off of the `dma' node instead of
  265                  * directly from the ISA bridge node.
  266                  */
  267                 if (strcmp(name, "dma") == 0)
  268                         isa_setup_children(dev, node);
  269 
  270                 free(name, M_OFWPROP);
  271         }
  272 }
  273 
  274 struct resource *
  275 isa_alloc_resource(device_t bus, device_t child, int type, int *rid,
  276     u_long start, u_long end, u_long count, u_int flags)
  277 {
  278         /*
  279          * Consider adding a resource definition.
  280          */
  281         int passthrough = (device_get_parent(child) != bus);
  282         int isdefault = (start == 0UL && end == ~0UL);
  283         struct resource_list *rl;
  284         struct resource_list_entry *rle;
  285         u_long base, limit;
  286 
  287         rl = BUS_GET_RESOURCE_LIST(bus, child);
  288         if (!passthrough && !isdefault) {
  289                 rle = resource_list_find(rl, type, *rid);
  290                 if (!rle) {
  291                         if (*rid < 0)
  292                                 return (NULL);
  293                         switch (type) {
  294                         case SYS_RES_IRQ:
  295                                 if (*rid >= ISA_NIRQ)
  296                                         return (NULL);
  297                                 break;
  298                         case SYS_RES_DRQ:
  299                                 if (*rid >= ISA_NDRQ)
  300                                         return (NULL);
  301                                 break;
  302                         case SYS_RES_MEMORY:
  303                                 if (*rid >= ISA_NMEM)
  304                                         return (NULL);
  305                                 break;
  306                         case SYS_RES_IOPORT:
  307                                 if (*rid >= ISA_NPORT)
  308                                         return (NULL);
  309                                 break;
  310                         default:
  311                                 return (NULL);
  312                         }
  313                         resource_list_add(rl, type, *rid, start, end, count);
  314                 }
  315         }
  316 
  317         /*
  318          * Sanity check if the resource in the respective entry is fully
  319          * mapped and specified and its type allocable. A driver could
  320          * have added an out of range resource on its own.
  321          */
  322         if (!passthrough) {
  323                 if ((rle = resource_list_find(rl, type, *rid)) == NULL)
  324                         return (NULL);
  325                 base = limit = 0;
  326                 switch (type) {
  327                 case SYS_RES_MEMORY:
  328                         base = isa_mem_base;
  329                         limit = base + isa_mem_limit;
  330                         break;
  331                 case SYS_RES_IOPORT:
  332                         base = isa_io_base;
  333                         limit = base + isa_io_limit;
  334                         break;
  335                 case SYS_RES_IRQ:
  336                         if (rle->start != rle->end || rle->start <= 7)
  337                                 return (NULL);
  338                         break;
  339                 case SYS_RES_DRQ:
  340                         break;
  341                 default:
  342                         return (NULL);
  343                 }
  344                 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
  345                         if (!INRANGE(rle->start, base, limit) ||
  346                             !INRANGE(rle->end, base, limit))
  347                                 return (NULL);
  348                 }
  349         }
  350 
  351         return (resource_list_alloc(rl, bus, child, type, rid, start, end,
  352             count, flags));
  353 }
  354 
  355 int
  356 isa_release_resource(device_t bus, device_t child, int type, int rid,
  357     struct resource *res)
  358 {
  359 
  360         return (bus_generic_rl_release_resource(bus, child, type, rid, res));
  361 }

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