/*      $NetBSD: upa.c,v 1.24 2022/01/22 11:49:17 thorpej Exp $ */
/*      $OpenBSD: upa.c,v 1.8 2008/01/17 22:53:18 kettenis Exp $        */

/*
* Copyright (c) 2002 Jason L. Wright ([email protected])
* 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.
*
* Effort sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F30602-01-2-0537.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: upa.c,v 1.24 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/kmem.h>

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

struct upa_range {
       u_int64_t       ur_space;
       u_int64_t       ur_addr;
       u_int64_t       ur_len;
};

struct upa_softc {
       device_t                sc_dev;
       bus_space_tag_t         sc_bt;
       bus_space_handle_t      sc_reg[3];
       struct upa_range        *sc_range;
       int                     sc_node;
       int                     sc_nrange;
       bus_space_tag_t         sc_cbt;
};

int     upa_match(device_t, cfdata_t, void *);
void    upa_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(upa, sizeof(struct upa_softc),
   upa_match, upa_attach, NULL, NULL);

int upa_print(void *, const char *);
bus_space_tag_t upa_alloc_bus_tag(struct upa_softc *);
int upa_bus_map(bus_space_tag_t, bus_addr_t,
   bus_size_t, int, vaddr_t, bus_space_handle_t *);
paddr_t upa_bus_mmap(bus_space_tag_t, bus_addr_t, off_t, int, int);

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

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

       return (0);
}

void
upa_attach(device_t parent, device_t self, void *aux)
{
       struct upa_softc *sc = device_private(self);
       struct mainbus_attach_args *ma = aux;
       int i, node;

       sc->sc_dev = self;
       sc->sc_bt = ma->ma_bustag;
       sc->sc_node = ma->ma_node;

       for (i = 0; i < 3; i++) {
               if (i >= ma->ma_nreg) {
                       printf(": no register %d\n", i);
                       return;
               }
               if (bus_space_map(sc->sc_bt, ma->ma_reg[i].ur_paddr,
                   ma->ma_reg[i].ur_len, 0, &sc->sc_reg[i])) {
                       printf(": failed to map reg%d\n", i);
                       return;
               }
       }

       if (prom_getprop(sc->sc_node, "ranges", sizeof(struct upa_range),
           &sc->sc_nrange, (void **)&sc->sc_range))
               panic("upa: can't get ranges");

       printf("\n");

       sc->sc_cbt = upa_alloc_bus_tag(sc);

       devhandle_t selfh = device_handle(sc->sc_dev);
       for (node = OF_child(sc->sc_node); node; node = OF_peer(node)) {
               char buf[32];
               struct mainbus_attach_args map;

               bzero(&map, sizeof(map));
               if (OF_getprop(node, "device_type", buf, sizeof(buf)) <= 0)
                       continue;
               if (prom_getprop(node, "reg", sizeof(*map.ma_reg),
                   &map.ma_nreg, (void **)&map.ma_reg) != 0)
                       continue;
               if (OF_getprop(node, "name", buf, sizeof(buf)) <= 0)
                       continue;
               map.ma_node = node;
               map.ma_name = buf;
               map.ma_bustag = sc->sc_cbt;
               map.ma_dmatag = ma->ma_dmatag;
               config_found(sc->sc_dev, &map, upa_print,
                   CFARGS(.devhandle = prom_node_to_devhandle(selfh, node)));
       }
}

int
upa_print(void *args, const char *name)
{
       struct mainbus_attach_args *ma = args;

       if (name)
               printf("\"%s\" at %s", ma->ma_name, name);
       return (UNCONF);
}

bus_space_tag_t
upa_alloc_bus_tag(struct upa_softc *sc)
{
       struct sparc_bus_space_tag *bt;

       bt = kmem_zalloc(sizeof(*bt), KM_SLEEP);
       *bt = *sc->sc_bt;
       bt->cookie = sc;
       bt->parent = sc->sc_bt;
       bt->sparc_bus_map = upa_bus_map;
       bt->sparc_bus_mmap = upa_bus_mmap;

       return bt;
}

int
upa_bus_map(bus_space_tag_t t, bus_addr_t offset,
   bus_size_t size, int flags, vaddr_t v, bus_space_handle_t *hp)
{
       struct upa_softc *sc = t->cookie;
       int i;

       if (t->parent == 0 || t->parent->sparc_bus_map == 0) {
               printf("\n__upa_bus_map: invalid parent");
               return (EINVAL);
       }

       t = t->parent;

       for (i = 0; i < sc->sc_nrange; i++) {
               if (offset < sc->sc_range[i].ur_space)
                       continue;
               if (offset >= (sc->sc_range[i].ur_space +
                   sc->sc_range[i].ur_space))
                       continue;
               break;
       }
       if (i == sc->sc_nrange)
               return (EINVAL);

       offset -= sc->sc_range[i].ur_space;
       offset += sc->sc_range[i].ur_addr;

       return ((*t->sparc_bus_map)(t, offset, size, flags, v, hp));
}

paddr_t
upa_bus_mmap(bus_space_tag_t t, bus_addr_t paddr, off_t off, int prot,
   int flags)
{
       struct upa_softc *sc = t->cookie;
       int i;

       if (t->parent == 0 || t->parent->sparc_bus_map == 0) {
               printf("\n__upa_bus_map: invalid parent");
               return (EINVAL);
       }

       t = t->parent;

       for (i = 0; i < sc->sc_nrange; i++) {
               if (paddr + off < sc->sc_range[i].ur_space)
                       continue;
               if (paddr + off >= (sc->sc_range[i].ur_space +
                   sc->sc_range[i].ur_space))
                       continue;
               break;
       }
       if (i == sc->sc_nrange)
               return (EINVAL);

       paddr -= sc->sc_range[i].ur_space;
       paddr += sc->sc_range[i].ur_addr;

       return ((*t->sparc_bus_mmap)(t, paddr, off, prot, flags));
}

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