/* $NetBSD: ofwpci.c,v 1.21 2021/08/07 16:19:01 thorpej Exp $ */

/*-
* Copyright (c) 2007 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Tim Rightnour
*
* 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.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ofwpci.c,v 1.21 2021/08/07 16:19:01 thorpej Exp $");

#include "opt_pci.h"

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

#include <dev/pci/pcivar.h>
#include <dev/pci/pciconf.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_pci.h>

#include <machine/autoconf.h>
#include <machine/isa_machdep.h>
#include <machine/pio.h>

struct ofwpci_softc {
       device_t sc_dev;
       struct genppc_pci_chipset sc_pc;
       struct powerpc_bus_space sc_iot;
       struct powerpc_bus_space sc_memt;
};

static void ofwpci_attach(device_t, device_t, void *);
static int ofwpci_match(device_t, cfdata_t, void *);

CFATTACH_DECL_NEW(ofwpci, sizeof(struct ofwpci_softc),
   ofwpci_match, ofwpci_attach, NULL, NULL);

extern struct genppc_pci_chipset *genppc_pct;
extern struct model_data modeldata;

static void
ofwpci_get_chipset_tag(pci_chipset_tag_t pc)
{
       pc->pc_conf_v = (void *)pc;

       pc->pc_attach_hook = genppc_pci_ofmethod_attach_hook;
       pc->pc_bus_maxdevs = genppc_pci_bus_maxdevs;
       pc->pc_make_tag = genppc_pci_ofmethod_make_tag;
       pc->pc_conf_read = genppc_pci_ofmethod_conf_read;
       pc->pc_conf_write = genppc_pci_ofmethod_conf_write;

       pc->pc_intr_v = (void *)pc;

       pc->pc_intr_map = genofw_pci_intr_map;
       pc->pc_intr_string = genppc_pci_intr_string;
       pc->pc_intr_evcnt = genppc_pci_intr_evcnt;
       pc->pc_intr_establish = genppc_pci_intr_establish;
       pc->pc_intr_disestablish = genppc_pci_intr_disestablish;
       pc->pc_intr_setattr = genppc_pci_intr_setattr;
       pc->pc_intr_type = genppc_pci_intr_type;
       pc->pc_intr_alloc = genppc_pci_intr_alloc;
       pc->pc_intr_release = genppc_pci_intr_release;
       pc->pc_intx_alloc = genppc_pci_intx_alloc;

       pc->pc_msi_v = (void *)pc;
       genppc_pci_chipset_msi_init(pc);

       pc->pc_msix_v = (void *)pc;
       genppc_pci_chipset_msix_init(pc);

       pc->pc_conf_interrupt = genppc_pci_conf_interrupt;
       pc->pc_decompose_tag = genppc_pci_ofmethod_decompose_tag;
       pc->pc_conf_hook = genofw_pci_conf_hook;

       pc->pc_addr = 0;
       pc->pc_data = 0;
       pc->pc_bus = 0;
       pc->pc_node = 0;
       pc->pc_memt = 0;
       pc->pc_iot = 0;
       pc->pc_ihandle = 0;
}

static int
ofwpci_match(device_t parent, cfdata_t cf, void *aux)
{
       struct confargs *ca = aux;
       char name[32];

       if (strcmp(ca->ca_name, "pci") != 0)
               return 0;

       memset(name, 0, sizeof(name));
       OF_getprop(ca->ca_node, "device_type", name, sizeof(name));
       if (strcmp(name, "pci") != 0)
               return 0;

       return 1;
}

static void
ofwpci_attach(device_t parent, device_t self, void *aux)
{
       struct ofwpci_softc *sc = device_private(self);
       pci_chipset_tag_t pc = &sc->sc_pc;
       struct confargs *ca = aux;
       struct pcibus_attach_args pba;
       struct genppc_pci_chipset_businfo *pbi;
       int node = ca->ca_node;
       int i;
       uint32_t busrange[2];
       char buf[64];

       aprint_normal("\n");

       sc->sc_dev = self;

       /* PCI bus number */
       if (OF_getprop(node, "bus-range", busrange, sizeof(busrange)) != 8)
               return;

       /* bus space map the io ranges */
       sc->sc_iot.pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_IO_TYPE;
       sc->sc_iot.pbs_base = 0x00000000;
       if (ofwoea_map_space(RANGE_TYPE_PCI, RANGE_IO, node, &sc->sc_iot,
           "ofwpci io-space") != 0)
               panic("Can't init ofwpci io tag");

       sc->sc_memt.pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE;
       sc->sc_memt.pbs_base = 0x00000000;
       if (ofwoea_map_space(RANGE_TYPE_PCI, RANGE_MEM, node, &sc->sc_memt,
           "ofwpci mem-space") != 0)
               panic("Can't init ofwpci mem tag");

       aprint_debug("io base=0x%"PRIxPTR" offset=0x%"PRIxPTR" limit=0x%"PRIxPTR"\n",
           sc->sc_iot.pbs_base, sc->sc_iot.pbs_offset, sc->sc_iot.pbs_limit);

       aprint_debug("mem base=0x%"PRIxPTR" offset=0x%"PRIxPTR" limit=0x%"PRIxPTR"\n",
           sc->sc_memt.pbs_base, sc->sc_memt.pbs_offset,
           sc->sc_memt.pbs_limit);

       /* are we the primary pci bus? */
       if (of_find_firstchild_byname(OF_finddevice("/"), "pci") == node) {
               int isa_node;

               /* yes we are, now do we have an ISA child? */
               isa_node = of_find_firstchild_byname(node, "isa");
               if (isa_node != -1) {
                       /* isa == pci */
                       genppc_isa_io_space_tag = sc->sc_iot;
                       genppc_isa_mem_space_tag = sc->sc_memt;
                       map_isa_ioregs();
                       init_ofppc_interrupt();
                       ofppc_init_comcons(isa_node);
               }
       }

       ofwpci_get_chipset_tag(pc);

       pc->pc_node = node;
       i = OF_package_to_path(node, buf, sizeof(buf)-5);
       if (i <= 0)
               panic("Can't determine path for pci node %d", node);
       buf[i] = '\0';
       pc->pc_ihandle = OF_open(buf);
       if (pc->pc_ihandle < 0)
               panic("Can't open device %s", buf);
       pc->pc_bus = busrange[0];
       pc->pc_iot = &sc->sc_iot;
       pc->pc_memt = &sc->sc_memt;

       pbi = kmem_alloc(sizeof(struct genppc_pci_chipset_businfo), KM_SLEEP);
       pbi->pbi_properties = prop_dictionary_create();
       KASSERT(pbi->pbi_properties != NULL);
       SIMPLEQ_INIT(&pc->pc_pbi);
       SIMPLEQ_INSERT_TAIL(&pc->pc_pbi, pbi, next);

       genofw_setup_pciintr_map((void *)pc, pbi, pc->pc_node);
#ifdef PCI_NETBSD_CONFIGURE
       struct pciconf_resources *pcires = pciconf_resource_init();

       pciconf_resource_add(pcires, PCICONF_RESOURCE_IO,
           modeldata.pciiodata[device_unit(self)].start,
           (modeldata.pciiodata[device_unit(self)].limit -
            modeldata.pciiodata[device_unit(self)].start) + 1);

       pciconf_resource_add(pcires, PCICONF_RESOURCE_MEM,
           sc->sc_memt.pbs_base,
           (sc->sc_memt.pbs_limit - sc->sc_memt.pbs_base) + 1);

       if (pci_configure_bus(pc, pcires, 0, CACHELINESIZE))
               aprint_error("pci_configure_bus() failed\n");

       pciconf_resource_fini(pcires);
#endif /* PCI_NETBSD_CONFIGURE */
       memset(&pba, 0, sizeof(pba));
       pba.pba_memt = pc->pc_memt;
       pba.pba_iot = pc->pc_iot;
       pba.pba_dmat = &pci_bus_dma_tag;
       pba.pba_dmat64 = NULL;
       pba.pba_bus = pc->pc_bus;
       pba.pba_bridgetag = NULL;
       pba.pba_pc = pc;
       pba.pba_flags = PCI_FLAGS_IO_OKAY | PCI_FLAGS_MEM_OKAY;
       config_found(self, &pba, pcibusprint,
           CFARGS(.devhandle = device_handle(self)));
}

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