lbc.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 2006-2008, Juniper Networks, Inc.
    5  * Copyright (c) 2008 Semihalf, Rafal Czubak
    6  * Copyright (c) 2009 The FreeBSD Foundation
    7  * All rights reserved.
    8  *
    9  * Portions of this software were developed by Semihalf
   10  * under sponsorship from the FreeBSD Foundation.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  * 3. The name of the author may not be used to endorse or promote products
   21  *    derived from this software without specific prior written permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   28  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   29  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   30  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   31  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   33  * SUCH DAMAGE.
   34  */
   35 
   36 #include "opt_platform.h"
   37 
   38 #include <sys/cdefs.h>
   39 __FBSDID("$FreeBSD$");
   40 
   41 #include <sys/param.h>
   42 #include <sys/systm.h>
   43 #include <sys/ktr.h>
   44 #include <sys/kernel.h>
   45 #include <sys/malloc.h>
   46 #include <sys/module.h>
   47 #include <sys/bus.h>
   48 #include <sys/rman.h>
   49 #include <machine/bus.h>
   50 
   51 #include <vm/vm.h>
   52 #include <vm/pmap.h>
   53 
   54 #include <dev/fdt/fdt_common.h>
   55 #include <dev/ofw/ofw_bus.h>
   56 #include <dev/ofw/ofw_bus_subr.h>
   57 
   58 #include <powerpc/mpc85xx/mpc85xx.h>
   59 
   60 #include "ofw_bus_if.h"
   61 #include "lbc.h"
   62 
   63 #ifdef DEBUG
   64 #define debugf(fmt, args...) do { printf("%s(): ", __func__);   \
   65     printf(fmt,##args); } while (0)
   66 #else
   67 #define debugf(fmt, args...)
   68 #endif
   69 
   70 static MALLOC_DEFINE(M_LBC, "localbus", "localbus devices information");
   71 
   72 static int lbc_probe(device_t);
   73 static int lbc_attach(device_t);
   74 static int lbc_shutdown(device_t);
   75 static int lbc_activate_resource(device_t bus __unused, device_t child __unused,
   76     int type, int rid __unused, struct resource *r);
   77 static int lbc_deactivate_resource(device_t bus __unused,
   78     device_t child __unused, int type __unused, int rid __unused,
   79     struct resource *r);
   80 static struct resource *lbc_alloc_resource(device_t, device_t, int, int *,
   81     rman_res_t, rman_res_t, rman_res_t, u_int);
   82 static int lbc_print_child(device_t, device_t);
   83 static int lbc_release_resource(device_t, device_t, int, int,
   84     struct resource *);
   85 static const struct ofw_bus_devinfo *lbc_get_devinfo(device_t, device_t);
   86 
   87 /*
   88  * Bus interface definition
   89  */
   90 static device_method_t lbc_methods[] = {
   91         /* Device interface */
   92         DEVMETHOD(device_probe,         lbc_probe),
   93         DEVMETHOD(device_attach,        lbc_attach),
   94         DEVMETHOD(device_shutdown,      lbc_shutdown),
   95 
   96         /* Bus interface */
   97         DEVMETHOD(bus_print_child,      lbc_print_child),
   98         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
   99         DEVMETHOD(bus_teardown_intr,    NULL),
  100 
  101         DEVMETHOD(bus_alloc_resource,   lbc_alloc_resource),
  102         DEVMETHOD(bus_release_resource, lbc_release_resource),
  103         DEVMETHOD(bus_activate_resource, lbc_activate_resource),
  104         DEVMETHOD(bus_deactivate_resource, lbc_deactivate_resource),
  105 
  106         /* OFW bus interface */
  107         DEVMETHOD(ofw_bus_get_devinfo,  lbc_get_devinfo),
  108         DEVMETHOD(ofw_bus_get_compat,   ofw_bus_gen_get_compat),
  109         DEVMETHOD(ofw_bus_get_model,    ofw_bus_gen_get_model),
  110         DEVMETHOD(ofw_bus_get_name,     ofw_bus_gen_get_name),
  111         DEVMETHOD(ofw_bus_get_node,     ofw_bus_gen_get_node),
  112         DEVMETHOD(ofw_bus_get_type,     ofw_bus_gen_get_type),
  113         { 0, 0 }
  114 };
  115 
  116 static driver_t lbc_driver = {
  117         "lbc",
  118         lbc_methods,
  119         sizeof(struct lbc_softc)
  120 };
  121 
  122 EARLY_DRIVER_MODULE(lbc, ofwbus, lbc_driver, 0, 0, BUS_PASS_BUS);
  123 
  124 /*
  125  * Calculate address mask used by OR(n) registers. Use memory region size to
  126  * determine mask value. The size must be a power of two and within the range
  127  * of 32KB - 4GB. Otherwise error code is returned. Value representing
  128  * 4GB size can be passed as 0xffffffff.
  129  */
  130 static uint32_t
  131 lbc_address_mask(uint32_t size)
  132 {
  133         int n = 15;
  134 
  135         if (size == ~0)
  136                 return (0);
  137 
  138         while (n < 32) {
  139                 if (size == (1U << n))
  140                         break;
  141                 n++;
  142         }
  143 
  144         if (n == 32)
  145                 return (EINVAL);
  146 
  147         return (0xffff8000 << (n - 15));
  148 }
  149 
  150 static void
  151 lbc_banks_unmap(struct lbc_softc *sc)
  152 {
  153         int r;
  154 
  155         r = 0;
  156         while (r < LBC_DEV_MAX) {
  157                 if (sc->sc_range[r].size == 0)
  158                         return;
  159 
  160                 pmap_unmapdev((void *)sc->sc_range[r].kva,
  161                     sc->sc_range[r].size);
  162                 law_disable(OCP85XX_TGTIF_LBC, sc->sc_range[r].addr,
  163                     sc->sc_range[r].size);
  164                 r++;
  165         }
  166 }
  167 
  168 static int
  169 lbc_banks_map(struct lbc_softc *sc)
  170 {
  171         vm_paddr_t end, start;
  172         vm_size_t size;
  173         u_int i, r, ranges, s;
  174         int error;
  175 
  176         bzero(sc->sc_range, sizeof(sc->sc_range));
  177 
  178         /*
  179          * Determine number of discontiguous address ranges to program.
  180          */
  181         ranges = 0;
  182         for (i = 0; i < LBC_DEV_MAX; i++) {
  183                 size = sc->sc_banks[i].size;
  184                 if (size == 0)
  185                         continue;
  186 
  187                 start = sc->sc_banks[i].addr;
  188                 for (r = 0; r < ranges; r++) {
  189                         /* Avoid wrap-around bugs. */
  190                         end = sc->sc_range[r].addr - 1 + sc->sc_range[r].size;
  191                         if (start > 0 && end == start - 1) {
  192                                 sc->sc_range[r].size += size;
  193                                 break;
  194                         }
  195                         /* Avoid wrap-around bugs. */
  196                         end = start - 1 + size;
  197                         if (sc->sc_range[r].addr > 0 &&
  198                             end == sc->sc_range[r].addr - 1) {
  199                                 sc->sc_range[r].addr = start;
  200                                 sc->sc_range[r].size += size;
  201                                 break;
  202                         }
  203                 }
  204                 if (r == ranges) {
  205                         /* New range; add using insertion sort */
  206                         r = 0;
  207                         while (r < ranges && sc->sc_range[r].addr < start)
  208                                 r++;
  209                         for (s = ranges; s > r; s--)
  210                                 sc->sc_range[s] = sc->sc_range[s-1];
  211                         sc->sc_range[r].addr = start;
  212                         sc->sc_range[r].size = size;
  213                         ranges++;
  214                 }
  215         }
  216 
  217         /*
  218          * Ranges are sorted so quickly go over the list to merge ranges
  219          * that grew toward each other while building the ranges.
  220          */
  221         r = 0;
  222         while (r < ranges - 1) {
  223                 end = sc->sc_range[r].addr + sc->sc_range[r].size;
  224                 if (end != sc->sc_range[r+1].addr) {
  225                         r++;
  226                         continue;
  227                 }
  228                 sc->sc_range[r].size += sc->sc_range[r+1].size;
  229                 for (s = r + 1; s < ranges - 1; s++)
  230                         sc->sc_range[s] = sc->sc_range[s+1];
  231                 bzero(&sc->sc_range[s], sizeof(sc->sc_range[s]));
  232                 ranges--;
  233         }
  234 
  235         /*
  236          * Configure LAW for the LBC ranges and map the physical memory
  237          * range into KVA.
  238          */
  239         for (r = 0; r < ranges; r++) {
  240                 start = sc->sc_range[r].addr;
  241                 size = sc->sc_range[r].size;
  242                 error = law_enable(OCP85XX_TGTIF_LBC, start, size);
  243                 if (error)
  244                         return (error);
  245                 sc->sc_range[r].kva = (vm_offset_t)pmap_mapdev(start, size);
  246         }
  247 
  248         /* XXX: need something better here? */
  249         if (ranges == 0)
  250                 return (EINVAL);
  251 
  252         /* Assign KVA to banks based on the enclosing range. */
  253         for (i = 0; i < LBC_DEV_MAX; i++) {
  254                 size = sc->sc_banks[i].size;
  255                 if (size == 0)
  256                         continue;
  257 
  258                 start = sc->sc_banks[i].addr;
  259                 for (r = 0; r < ranges; r++) {
  260                         end = sc->sc_range[r].addr - 1 + sc->sc_range[r].size;
  261                         if (start >= sc->sc_range[r].addr &&
  262                             start - 1 + size <= end)
  263                                 break;
  264                 }
  265                 if (r < ranges) {
  266                         sc->sc_banks[i].kva = sc->sc_range[r].kva +
  267                             (start - sc->sc_range[r].addr);
  268                 }
  269         }
  270 
  271         return (0);
  272 }
  273 
  274 static int
  275 lbc_banks_enable(struct lbc_softc *sc)
  276 {
  277         uint32_t size;
  278         uint32_t regval;
  279         int error, i;
  280 
  281         for (i = 0; i < LBC_DEV_MAX; i++) {
  282                 size = sc->sc_banks[i].size;
  283                 if (size == 0)
  284                         continue;
  285 
  286                 /*
  287                  * Compute and program BR value.
  288                  */
  289                 regval = sc->sc_banks[i].addr;
  290                 switch (sc->sc_banks[i].width) {
  291                 case 8:
  292                         regval |= (1 << 11);
  293                         break;
  294                 case 16:
  295                         regval |= (2 << 11);
  296                         break;
  297                 case 32:
  298                         regval |= (3 << 11);
  299                         break;
  300                 default:
  301                         error = EINVAL;
  302                         goto fail;
  303                 }
  304                 regval |= (sc->sc_banks[i].decc << 9);
  305                 regval |= (sc->sc_banks[i].wp << 8);
  306                 regval |= (sc->sc_banks[i].msel << 5);
  307                 regval |= (sc->sc_banks[i].atom << 2);
  308                 regval |= 1;
  309                 bus_space_write_4(sc->sc_bst, sc->sc_bsh,
  310                     LBC85XX_BR(i), regval);
  311 
  312                 /*
  313                  * Compute and program OR value.
  314                  */
  315                 regval = lbc_address_mask(size);
  316                 switch (sc->sc_banks[i].msel) {
  317                 case LBCRES_MSEL_GPCM:
  318                         /* TODO Add flag support for option registers */
  319                         regval |= 0x0ff7;
  320                         break;
  321                 case LBCRES_MSEL_FCM:
  322                         /* TODO Add flag support for options register */
  323                         regval |= 0x0796;
  324                         break;
  325                 case LBCRES_MSEL_UPMA:
  326                 case LBCRES_MSEL_UPMB:
  327                 case LBCRES_MSEL_UPMC:
  328                         printf("UPM mode not supported yet!");
  329                         error = ENOSYS;
  330                         goto fail;
  331                 }
  332                 bus_space_write_4(sc->sc_bst, sc->sc_bsh,
  333                     LBC85XX_OR(i), regval);
  334         }
  335 
  336         return (0);
  337 
  338 fail:
  339         lbc_banks_unmap(sc);
  340         return (error);
  341 }
  342 
  343 static void
  344 fdt_lbc_fixup(phandle_t node, struct lbc_softc *sc, struct lbc_devinfo *di)
  345 {
  346         pcell_t width;
  347         int bank;
  348 
  349         if (OF_getprop(node, "bank-width", (void *)&width, sizeof(width)) <= 0)
  350                 return;
  351 
  352         bank = di->di_bank;
  353         if (sc->sc_banks[bank].size == 0)
  354                 return;
  355 
  356         /* Express width in bits. */
  357         sc->sc_banks[bank].width = width * 8;
  358 }
  359 
  360 static int
  361 fdt_lbc_reg_decode(phandle_t node, struct lbc_softc *sc,
  362     struct lbc_devinfo *di)
  363 {
  364         rman_res_t start, end, count;
  365         pcell_t *reg, *regptr;
  366         pcell_t addr_cells, size_cells;
  367         int tuple_size, tuples;
  368         int i, j, rv, bank;
  369 
  370         if (fdt_addrsize_cells(OF_parent(node), &addr_cells, &size_cells) != 0)
  371                 return (ENXIO);
  372 
  373         tuple_size = sizeof(pcell_t) * (addr_cells + size_cells);
  374         tuples = OF_getencprop_alloc_multi(node, "reg", tuple_size,
  375             (void **)&reg);
  376         debugf("addr_cells = %d, size_cells = %d\n", addr_cells, size_cells);
  377         debugf("tuples = %d, tuple size = %d\n", tuples, tuple_size);
  378         if (tuples <= 0)
  379                 /* No 'reg' property in this node. */
  380                 return (0);
  381 
  382         regptr = reg;
  383         for (i = 0; i < tuples; i++) {
  384                 bank = fdt_data_get((void *)reg, 1);
  385                 di->di_bank = bank;
  386                 reg += 1;
  387 
  388                 /* Get address/size. */
  389                 start = count = 0;
  390                 for (j = 0; j < addr_cells - 1; j++) {
  391                         start <<= 32;
  392                         start |= reg[j];
  393                 }
  394                 for (j = 0; j < size_cells; j++) {
  395                         count <<= 32;
  396                         count |= reg[addr_cells + j - 1];
  397                 }
  398                 reg += addr_cells - 1 + size_cells;
  399 
  400                 /* Calculate address range relative to VA base. */
  401                 start = sc->sc_banks[bank].kva + start;
  402                 end = start + count - 1;
  403 
  404                 debugf("reg addr bank = %d, start = %jx, end = %jx, "
  405                     "count = %jx\n", bank, start, end, count);
  406 
  407                 /* Use bank (CS) cell as rid. */
  408                 resource_list_add(&di->di_res, SYS_RES_MEMORY, bank, start,
  409                     end, count);
  410         }
  411         rv = 0;
  412         OF_prop_free(regptr);
  413         return (rv);
  414 }
  415 
  416 static void
  417 lbc_intr(void *arg)
  418 {
  419         struct lbc_softc *sc = arg;
  420         uint32_t ltesr;
  421 
  422         ltesr = bus_space_read_4(sc->sc_bst, sc->sc_bsh, LBC85XX_LTESR);
  423         sc->sc_ltesr = ltesr;
  424         bus_space_write_4(sc->sc_bst, sc->sc_bsh, LBC85XX_LTESR, ltesr);
  425         wakeup(sc->sc_dev);
  426 }
  427 
  428 static int
  429 lbc_probe(device_t dev)
  430 {
  431 
  432         if (!(ofw_bus_is_compatible(dev, "fsl,lbc") ||
  433             ofw_bus_is_compatible(dev, "fsl,elbc")))
  434                 return (ENXIO);
  435 
  436         device_set_desc(dev, "Freescale Local Bus Controller");
  437         return (BUS_PROBE_DEFAULT);
  438 }
  439 
  440 static int
  441 lbc_attach(device_t dev)
  442 {
  443         struct lbc_softc *sc;
  444         struct lbc_devinfo *di;
  445         struct rman *rm;
  446         uintmax_t offset, size;
  447         vm_paddr_t start;
  448         device_t cdev;
  449         phandle_t node, child;
  450         pcell_t *ranges, *rangesptr;
  451         int tuple_size, tuples;
  452         int par_addr_cells;
  453         int bank, error, i, j;
  454 
  455         sc = device_get_softc(dev);
  456         sc->sc_dev = dev;
  457 
  458         sc->sc_mrid = 0;
  459         sc->sc_mres = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->sc_mrid,
  460             RF_ACTIVE);
  461         if (sc->sc_mres == NULL)
  462                 return (ENXIO);
  463 
  464         sc->sc_bst = rman_get_bustag(sc->sc_mres);
  465         sc->sc_bsh = rman_get_bushandle(sc->sc_mres);
  466 
  467         for (bank = 0; bank < LBC_DEV_MAX; bank++) {
  468                 bus_space_write_4(sc->sc_bst, sc->sc_bsh, LBC85XX_BR(bank), 0);
  469                 bus_space_write_4(sc->sc_bst, sc->sc_bsh, LBC85XX_OR(bank), 0);
  470         }
  471 
  472         /*
  473          * Initialize configuration register:
  474          * - enable Local Bus
  475          * - set data buffer control signal function
  476          * - disable parity byte select
  477          * - set ECC parity type
  478          * - set bus monitor timing and timer prescale
  479          */
  480         bus_space_write_4(sc->sc_bst, sc->sc_bsh, LBC85XX_LBCR, 0);
  481 
  482         /*
  483          * Initialize clock ratio register:
  484          * - disable PLL bypass mode
  485          * - configure LCLK delay cycles for the assertion of LALE
  486          * - set system clock divider
  487          */
  488         bus_space_write_4(sc->sc_bst, sc->sc_bsh, LBC85XX_LCRR, 0x00030008);
  489 
  490         bus_space_write_4(sc->sc_bst, sc->sc_bsh, LBC85XX_LTEDR, 0);
  491         bus_space_write_4(sc->sc_bst, sc->sc_bsh, LBC85XX_LTESR, ~0);
  492         bus_space_write_4(sc->sc_bst, sc->sc_bsh, LBC85XX_LTEIR, 0x64080001);
  493 
  494         sc->sc_irid = 0;
  495         sc->sc_ires = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->sc_irid,
  496             RF_ACTIVE | RF_SHAREABLE);
  497         if (sc->sc_ires != NULL) {
  498                 error = bus_setup_intr(dev, sc->sc_ires,
  499                     INTR_TYPE_MISC | INTR_MPSAFE, NULL, lbc_intr, sc,
  500                     &sc->sc_icookie);
  501                 if (error) {
  502                         device_printf(dev, "could not activate interrupt\n");
  503                         bus_release_resource(dev, SYS_RES_IRQ, sc->sc_irid,
  504                             sc->sc_ires);
  505                         sc->sc_ires = NULL;
  506                 }
  507         }
  508 
  509         sc->sc_ltesr = ~0;
  510 
  511         rangesptr = NULL;
  512 
  513         rm = &sc->sc_rman;
  514         rm->rm_type = RMAN_ARRAY;
  515         rm->rm_descr = "Local Bus Space";
  516         error = rman_init(rm);
  517         if (error)
  518                 goto fail;
  519 
  520         error = rman_manage_region(rm, rm->rm_start, rm->rm_end);
  521         if (error) {
  522                 rman_fini(rm);
  523                 goto fail;
  524         }
  525 
  526         /*
  527          * Process 'ranges' property.
  528          */
  529         node = ofw_bus_get_node(dev);
  530         if ((fdt_addrsize_cells(node, &sc->sc_addr_cells,
  531             &sc->sc_size_cells)) != 0) {
  532                 error = ENXIO;
  533                 goto fail;
  534         }
  535 
  536         par_addr_cells = fdt_parent_addr_cells(node);
  537         if (par_addr_cells > 2) {
  538                 device_printf(dev, "unsupported parent #addr-cells\n");
  539                 error = ERANGE;
  540                 goto fail;
  541         }
  542         tuple_size = sizeof(pcell_t) * (sc->sc_addr_cells + par_addr_cells +
  543             sc->sc_size_cells);
  544 
  545         tuples = OF_getencprop_alloc_multi(node, "ranges", tuple_size,
  546             (void **)&ranges);
  547         if (tuples < 0) {
  548                 device_printf(dev, "could not retrieve 'ranges' property\n");
  549                 error = ENXIO;
  550                 goto fail;
  551         }
  552         rangesptr = ranges;
  553 
  554         debugf("par addr_cells = %d, addr_cells = %d, size_cells = %d, "
  555             "tuple_size = %d, tuples = %d\n", par_addr_cells,
  556             sc->sc_addr_cells, sc->sc_size_cells, tuple_size, tuples);
  557 
  558         start = 0;
  559         size = 0;
  560         for (i = 0; i < tuples; i++) {
  561                 /* The first cell is the bank (chip select) number. */
  562                 bank = fdt_data_get(ranges, 1);
  563                 if (bank < 0 || bank > LBC_DEV_MAX) {
  564                         device_printf(dev, "bank out of range: %d\n", bank);
  565                         error = ERANGE;
  566                         goto fail;
  567                 }
  568                 ranges += 1;
  569 
  570                 /*
  571                  * Remaining cells of the child address define offset into
  572                  * this CS.
  573                  */
  574                 offset = 0;
  575                 for (j = 0; j < sc->sc_addr_cells - 1; j++) {
  576                         offset <<= sizeof(pcell_t) * 8;
  577                         offset |= *ranges;
  578                         ranges++;
  579                 }
  580 
  581                 /* Parent bus start address of this bank. */
  582                 start = 0;
  583                 for (j = 0; j < par_addr_cells; j++) {
  584                         start <<= sizeof(pcell_t) * 8;
  585                         start |= *ranges;
  586                         ranges++;
  587                 }
  588 
  589                 size = fdt_data_get((void *)ranges, sc->sc_size_cells);
  590                 ranges += sc->sc_size_cells;
  591                 debugf("bank = %d, start = %jx, size = %jx\n", bank,
  592                     (uintmax_t)start, size);
  593 
  594                 sc->sc_banks[bank].addr = start + offset;
  595                 sc->sc_banks[bank].size = size;
  596 
  597                 /*
  598                  * Attributes for the bank.
  599                  *
  600                  * XXX Note there are no DT bindings defined for them at the
  601                  * moment, so we need to provide some defaults.
  602                  */
  603                 sc->sc_banks[bank].width = 16;
  604                 sc->sc_banks[bank].msel = LBCRES_MSEL_GPCM;
  605                 sc->sc_banks[bank].decc = LBCRES_DECC_DISABLED;
  606                 sc->sc_banks[bank].atom = LBCRES_ATOM_DISABLED;
  607                 sc->sc_banks[bank].wp = 0;
  608         }
  609 
  610         /*
  611          * Initialize mem-mappings for the LBC banks (i.e. chip selects).
  612          */
  613         error = lbc_banks_map(sc);
  614         if (error)
  615                 goto fail;
  616 
  617         /*
  618          * Walk the localbus and add direct subordinates as our children.
  619          */
  620         for (child = OF_child(node); child != 0; child = OF_peer(child)) {
  621                 di = malloc(sizeof(*di), M_LBC, M_WAITOK | M_ZERO);
  622 
  623                 if (ofw_bus_gen_setup_devinfo(&di->di_ofw, child) != 0) {
  624                         free(di, M_LBC);
  625                         device_printf(dev, "could not set up devinfo\n");
  626                         continue;
  627                 }
  628 
  629                 resource_list_init(&di->di_res);
  630 
  631                 if (fdt_lbc_reg_decode(child, sc, di)) {
  632                         device_printf(dev, "could not process 'reg' "
  633                             "property\n");
  634                         ofw_bus_gen_destroy_devinfo(&di->di_ofw);
  635                         free(di, M_LBC);
  636                         continue;
  637                 }
  638 
  639                 fdt_lbc_fixup(child, sc, di);
  640 
  641                 /* Add newbus device for this FDT node */
  642                 cdev = device_add_child(dev, NULL, -1);
  643                 if (cdev == NULL) {
  644                         device_printf(dev, "could not add child: %s\n",
  645                             di->di_ofw.obd_name);
  646                         resource_list_free(&di->di_res);
  647                         ofw_bus_gen_destroy_devinfo(&di->di_ofw);
  648                         free(di, M_LBC);
  649                         continue;
  650                 }
  651                 debugf("added child name='%s', node=%x\n", di->di_ofw.obd_name,
  652                     child);
  653                 device_set_ivars(cdev, di);
  654         }
  655 
  656         /*
  657          * Enable the LBC.
  658          */
  659         lbc_banks_enable(sc);
  660 
  661         OF_prop_free(rangesptr);
  662         return (bus_generic_attach(dev));
  663 
  664 fail:
  665         OF_prop_free(rangesptr);
  666         bus_release_resource(dev, SYS_RES_MEMORY, sc->sc_mrid, sc->sc_mres);
  667         return (error);
  668 }
  669 
  670 static int
  671 lbc_shutdown(device_t dev)
  672 {
  673 
  674         /* TODO */
  675         return(0);
  676 }
  677 
  678 static struct resource *
  679 lbc_alloc_resource(device_t bus, device_t child, int type, int *rid,
  680     rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
  681 {
  682         struct lbc_softc *sc;
  683         struct lbc_devinfo *di;
  684         struct resource_list_entry *rle;
  685         struct resource *res;
  686         struct rman *rm;
  687         int needactivate;
  688 
  689         /* We only support default allocations. */
  690         if (!RMAN_IS_DEFAULT_RANGE(start, end))
  691                 return (NULL);
  692 
  693         sc = device_get_softc(bus);
  694         if (type == SYS_RES_IRQ)
  695                 return (bus_alloc_resource(bus, type, rid, start, end, count,
  696                     flags));
  697 
  698         /*
  699          * Request for the default allocation with a given rid: use resource
  700          * list stored in the local device info.
  701          */
  702         if ((di = device_get_ivars(child)) == NULL)
  703                 return (NULL);
  704 
  705         if (type == SYS_RES_IOPORT)
  706                 type = SYS_RES_MEMORY;
  707 
  708         rid = &di->di_bank;
  709 
  710         rle = resource_list_find(&di->di_res, type, *rid);
  711         if (rle == NULL) {
  712                 device_printf(bus, "no default resources for "
  713                     "rid = %d, type = %d\n", *rid, type);
  714                 return (NULL);
  715         }
  716         start = rle->start;
  717         count = rle->count;
  718         end = start + count - 1;
  719 
  720         sc = device_get_softc(bus);
  721 
  722         needactivate = flags & RF_ACTIVE;
  723         flags &= ~RF_ACTIVE;
  724 
  725         rm = &sc->sc_rman;
  726 
  727         res = rman_reserve_resource(rm, start, end, count, flags, child);
  728         if (res == NULL) {
  729                 device_printf(bus, "failed to reserve resource %#jx - %#jx "
  730                     "(%#jx)\n", start, end, count);
  731                 return (NULL);
  732         }
  733 
  734         rman_set_rid(res, *rid);
  735         rman_set_bustag(res, &bs_be_tag);
  736         rman_set_bushandle(res, rman_get_start(res));
  737 
  738         if (needactivate)
  739                 if (bus_activate_resource(child, type, *rid, res)) {
  740                         device_printf(child, "resource activation failed\n");
  741                         rman_release_resource(res);
  742                         return (NULL);
  743                 }
  744 
  745         return (res);
  746 }
  747 
  748 static int
  749 lbc_print_child(device_t dev, device_t child)
  750 {
  751         struct lbc_devinfo *di;
  752         struct resource_list *rl;
  753         int rv;
  754 
  755         di = device_get_ivars(child);
  756         rl = &di->di_res;
  757 
  758         rv = 0;
  759         rv += bus_print_child_header(dev, child);
  760         rv += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#jx");
  761         rv += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd");
  762         rv += bus_print_child_footer(dev, child);
  763 
  764         return (rv);
  765 }
  766 
  767 static int
  768 lbc_release_resource(device_t dev, device_t child, int type, int rid,
  769     struct resource *res)
  770 {
  771         int err;
  772 
  773         if (rman_get_flags(res) & RF_ACTIVE) {
  774                 err = bus_deactivate_resource(child, type, rid, res);
  775                 if (err)
  776                         return (err);
  777         }
  778 
  779         return (rman_release_resource(res));
  780 }
  781 
  782 static int
  783 lbc_activate_resource(device_t bus __unused, device_t child __unused,
  784     int type __unused, int rid __unused, struct resource *r)
  785 {
  786 
  787         /* Child resources were already mapped, just activate. */
  788         return (rman_activate_resource(r));
  789 }
  790 
  791 static int
  792 lbc_deactivate_resource(device_t bus __unused, device_t child __unused,
  793     int type __unused, int rid __unused, struct resource *r)
  794 {
  795 
  796         return (rman_deactivate_resource(r));
  797 }
  798 
  799 static const struct ofw_bus_devinfo *
  800 lbc_get_devinfo(device_t bus, device_t child)
  801 {
  802         struct lbc_devinfo *di;
  803 
  804         di = device_get_ivars(child);
  805         return (&di->di_ofw);
  806 }
  807 
  808 void
  809 lbc_write_reg(device_t child, u_int off, uint32_t val)
  810 {
  811         device_t dev;
  812         struct lbc_softc *sc;
  813 
  814         dev = device_get_parent(child);
  815 
  816         if (off >= 0x1000) {
  817                 device_printf(dev, "%s(%s): invalid offset %#x\n",
  818                     __func__, device_get_nameunit(child), off);
  819                 return;
  820         }
  821 
  822         sc = device_get_softc(dev);
  823 
  824         if (off == LBC85XX_LTESR && sc->sc_ltesr != ~0u) {
  825                 sc->sc_ltesr ^= (val & sc->sc_ltesr);
  826                 return;
  827         }
  828 
  829         if (off == LBC85XX_LTEATR && (val & 1) == 0)
  830                 sc->sc_ltesr = ~0u;
  831         bus_space_write_4(sc->sc_bst, sc->sc_bsh, off, val);
  832 }
  833 
  834 uint32_t
  835 lbc_read_reg(device_t child, u_int off)
  836 {
  837         device_t dev;
  838         struct lbc_softc *sc;
  839         uint32_t val;
  840 
  841         dev = device_get_parent(child);
  842 
  843         if (off >= 0x1000) {
  844                 device_printf(dev, "%s(%s): invalid offset %#x\n",
  845                     __func__, device_get_nameunit(child), off);
  846                 return (~0U);
  847         }
  848 
  849         sc = device_get_softc(dev);
  850 
  851         if (off == LBC85XX_LTESR && sc->sc_ltesr != ~0U)
  852                 val = sc->sc_ltesr;
  853         else
  854                 val = bus_space_read_4(sc->sc_bst, sc->sc_bsh, off);
  855         return (val);
  856 }
Cache object: 1c1d1166074bd2ee8b72933c70a05c64
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.
FreeBSD/Linux Kernel Cross Reference sys/powerpc/mpc85xx/lbc.c

FreeBSD/Linux Kernel Cross Reference
sys/powerpc/mpc85xx/lbc.c
