/*      $NetBSD: bootbus.c,v 1.24 2022/01/22 11:49:16 thorpej Exp $     */

/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/

/*
* Autoconfiguration support for Sun4d "bootbus".
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: bootbus.c,v 1.24 2022/01/22 11:49:16 thorpej Exp $");

#include <sys/param.h>
#include <sys/malloc.h>
#include <sys/kmem.h>
#include <sys/systm.h>
#include <sys/device.h>

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

#include <sparc/sparc/cpuunitvar.h>
#include <sparc/dev/bootbusvar.h>

#include "locators.h"

struct bootbus_softc {
       int sc_node;                            /* our OBP node */

       bus_space_tag_t sc_st;                  /* ours */
       bus_space_tag_t sc_bustag;              /* passed on to children */
};

static int bootbus_match(device_t, cfdata_t, void *);
static void bootbus_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(bootbus, sizeof(struct bootbus_softc),
   bootbus_match, bootbus_attach, NULL, NULL);

static int bootbus_submatch(device_t, cfdata_t, const int *, void *);
static int bootbus_print(void *, const char *);

static int bootbus_setup_attach_args(struct bootbus_softc *, bus_space_tag_t,
   int, struct bootbus_attach_args *);
static void bootbus_destroy_attach_args(struct bootbus_attach_args *);

static int
bootbus_match(device_t parent, cfdata_t cf, void *aux)
{
       struct cpuunit_attach_args *cpua = aux;

       if (strcmp(cpua->cpua_name, cf->cf_name) == 0)
               return (1);

       return (0);
}

static void
bootbus_attach(device_t parent, device_t self, void *aux)
{
       struct bootbus_softc *sc = device_private(self);
       struct cpuunit_attach_args *cpua = aux;
       int node, error;

       sc->sc_node = cpua->cpua_node;
       sc->sc_st = cpua->cpua_bustag;

       printf("\n");

       /*
        * Initialize the bus space tag we pass on to our children.
        */
       sc->sc_bustag = kmem_zalloc(sizeof(*sc->sc_bustag), KM_SLEEP);
       sc->sc_bustag->cookie = sc;
       sc->sc_bustag->parent = sc->sc_st;
       sc->sc_bustag->sparc_bus_map = sc->sc_st->sparc_bus_map;
       sc->sc_bustag->sparc_bus_mmap = sc->sc_st->sparc_bus_mmap;

       /*
        * Collect address translations from the OBP.
        */
       error = prom_getprop(sc->sc_node, "ranges",
           sizeof(struct openprom_range), &sc->sc_bustag->nranges,
           &sc->sc_bustag->ranges);
       if (error) {
               printf("%s: error %d getting \"ranges\" property\n",
                   device_xname(self), error);
               panic("bootbus_attach");
       }

       /* Attach the CPU (and possibly bootbus) child nodes. */
       devhandle_t selfh = device_handle(self);
       for (node = firstchild(sc->sc_node); node != 0;
            node = nextsibling(node)) {
               struct bootbus_attach_args baa;

               if (bootbus_setup_attach_args(sc, sc->sc_bustag, node, &baa))
                       panic("bootbus_attach: failed to set up attach args");

               config_found(self, &baa, bootbus_print,
                   CFARGS(.devhandle = prom_node_to_devhandle(selfh, node),
                          .submatch = bootbus_submatch));

               bootbus_destroy_attach_args(&baa);
       }
}

static int
bootbus_submatch(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
{
       struct bootbus_attach_args *baa = aux;

       if (cf->cf_loc[BOOTBUSCF_SLOT] != BOOTBUSCF_SLOT_DEFAULT &&
           cf->cf_loc[BOOTBUSCF_SLOT] != baa->ba_slot)
               return (0);

       if (cf->cf_loc[BOOTBUSCF_OFFSET] != BOOTBUSCF_OFFSET_DEFAULT &&
           cf->cf_loc[BOOTBUSCF_OFFSET] != baa->ba_offset)
               return (0);

       return (config_match(parent, cf, aux));
}

static int
bootbus_print(void *aux, const char *pnp)
{
       struct bootbus_attach_args *baa = aux;
       int i;

       if (pnp)
               aprint_normal("%s at %s", baa->ba_name, pnp);
       aprint_normal(" slot %d offset 0x%x", baa->ba_slot, baa->ba_offset);
       for (i = 0; i < baa->ba_nintr; i++)
               aprint_normal(" ipl %d", baa->ba_intr[i].oi_pri);

       return (UNCONF);
}

static int
bootbus_setup_attach_args(struct bootbus_softc *sc, bus_space_tag_t bustag,
   int node, struct bootbus_attach_args *baa)
{
       int n, error;

       memset(baa, 0, sizeof(*baa));

       error = prom_getprop(node, "name", 1, &n, &baa->ba_name);
       if (error)
               return (error);
       baa->ba_name[n] = '\0';

       baa->ba_bustag = bustag;
       baa->ba_node = node;

       error = prom_getprop(node, "reg", sizeof(struct openprom_addr),
           &baa->ba_nreg, &baa->ba_reg);
       if (error) {
               bootbus_destroy_attach_args(baa);
               return (error);
       }

       error = prom_getprop(node, "intr", sizeof(struct openprom_intr),
           &baa->ba_nintr, &baa->ba_intr);
       if (error != 0 && error != ENOENT) {
               bootbus_destroy_attach_args(baa);
               return (error);
       }

       error = prom_getprop(node, "address", sizeof(uint32_t),
           &baa->ba_npromvaddrs, &baa->ba_promvaddrs);
       if (error != 0 && error != ENOENT) {
               bootbus_destroy_attach_args(baa);
               return (error);
       }

       return (0);
}

static void
bootbus_destroy_attach_args(struct bootbus_attach_args *baa)
{

       if (baa->ba_name != NULL)
               free(baa->ba_name, M_DEVBUF);

       if (baa->ba_reg != NULL)
               free(baa->ba_reg, M_DEVBUF);

       if (baa->ba_intr != NULL)
               free(baa->ba_intr, M_DEVBUF);

       if (baa->ba_promvaddrs != NULL)
               free(baa->ba_promvaddrs, M_DEVBUF);
}

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