sparc64/dev/central.c

/*        $NetBSD: central.c,v 1.9 2022/01/22 11:49:17 thorpej Exp $  */
/*        $OpenBSD: central.c,v 1.7 2010/11/11 17:58:23 miod Exp $    */

/*
 * Copyright (c) 2004 Jason L. Wright (jason@thought.net)
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: central.c,v 1.9 2022/01/22 11:49:17 thorpej Exp $");

#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <sys/malloc.h>
#include <sys/kmem.h>
#include <sys/bus.h>

#include <machine/autoconf.h>
#include <machine/openfirm.h>

#include <sparc64/dev/centralvar.h>

struct central_softc {
          bus_space_tag_t sc_bt;
          bus_space_tag_t sc_cbt;
          int sc_node;
          int sc_nrange;
          struct central_range *sc_range;
};

static int central_match(device_t, cfdata_t, void *);
static void central_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(central, sizeof(struct central_softc),
    central_match, central_attach, NULL, NULL);

static int central_print(void *, const char *);
static int central_get_string(int, const char *, char **);

static bus_space_tag_t central_alloc_bus_tag(struct central_softc *);
static int _central_bus_map(
                    bus_space_tag_t,
                    bus_addr_t,                   /*offset*/
                    bus_size_t,                   /*size*/
                    int,                          /*flags*/
                    vaddr_t,            /* XXX unused -- compat w/sparc */
                    bus_space_handle_t *);

static int
central_match(device_t parent, cfdata_t match, void *aux)
{
          struct mainbus_attach_args *ma = aux;

          if (strcmp(ma->ma_name, "central") == 0)
                    return (1);
          return (0);
}

static void
central_attach(device_t parent, device_t self, void *aux)
{
          struct central_softc *sc = device_private(self);
          struct mainbus_attach_args *ma = aux;
          int node0, node;

          sc->sc_bt = ma->ma_bustag;
          sc->sc_node = ma->ma_node;
          sc->sc_cbt = central_alloc_bus_tag(sc);

          prom_getprop(sc->sc_node, "ranges", sizeof(struct central_range),
              &sc->sc_nrange, (void **)&sc->sc_range);

          printf("\n");

          devhandle_t selfh = device_handle(self);
          node0 = firstchild(sc->sc_node);
          for (node = node0; node; node = nextsibling(node)) {
                    struct central_attach_args ca;

                    bzero(&ca, sizeof(ca));
                    ca.ca_node = node;
                    ca.ca_bustag = sc->sc_cbt;
                    if (central_get_string(ca.ca_node, "name", &ca.ca_name)) {
                              printf("can't fetch name for node 0x%x\n", node);
                              continue;
                    }

                    prom_getprop(node, "reg", sizeof(struct central_reg),
                        &ca.ca_nreg, (void **)&ca.ca_reg);

                    (void)config_found(self, (void *)&ca, central_print,
                        CFARGS(.devhandle = prom_node_to_devhandle(selfh,
                                                                             ca.ca_node)));

                    if (ca.ca_name != NULL)
                              free(ca.ca_name, M_DEVBUF);
          }
}

static int
central_get_string(int node, const char *name, char **buf)
{
          int len;

          len = prom_getproplen(node, name);
          if (len < 0)
                    return (len);
          *buf = malloc(len + 1, M_DEVBUF, M_WAITOK);
          if (len != 0)
                    prom_getpropstringA(node, name, *buf, len + 1);
          (*buf)[len] = '\0';
          return (0);
}

static int
central_print(void *args, const char *busname)
{
          struct central_attach_args *ca = args;
          char *class;

          if (busname != NULL) {
                    printf("\"%s\" at %s", ca->ca_name, busname);
                    class = prom_getpropstring(ca->ca_node, "device_type");
                    if (*class != '\0')
                              printf(" class %s", class);
          }
          return (UNCONF);
}

static bus_space_tag_t
central_alloc_bus_tag(struct central_softc *sc)
{
          struct sparc_bus_space_tag *bt;

          bt = kmem_zalloc(sizeof(*bt), KM_SLEEP);
          bt->cookie = sc;
          bt->parent = sc->sc_bt;
#if 0
          bt->asi = bt->parent->asi;
          bt->sasi = bt->parent->sasi;
#endif
          bt->sparc_bus_map = _central_bus_map;
          /* XXX bt->sparc_bus_mmap = central_bus_mmap; */
          /* XXX bt->sparc_intr_establish = upa_intr_establish; */
          return (bt);
}

static int
_central_bus_map(bus_space_tag_t t, bus_addr_t addr, bus_size_t size, int flags,
          vaddr_t v, bus_space_handle_t *hp)
{
          struct central_softc *sc = t->cookie;
          int64_t slot = BUS_ADDR_IOSPACE(addr);
          int64_t offset = BUS_ADDR_PADDR(addr);
          int i;

          if (t->parent == NULL || t->parent->sparc_bus_map == NULL) {
                    printf("\ncentral_bus_map: invalid parent");
                    return (EINVAL);
          }


          for (i = 0; i < sc->sc_nrange; i++) {
                    bus_addr_t paddr;

                    if (sc->sc_range[i].cspace != slot)
                              continue;

                    paddr = offset - sc->sc_range[i].coffset;
                    paddr += sc->sc_range[i].poffset;
                    paddr |= ((bus_addr_t)sc->sc_range[i].pspace << 32);

                    return bus_space_map(t->parent, paddr, size, flags, hp);
          }

          return (EINVAL);
}