* Copyright (c) 2000 Tsubai Masanari. All rights reserved.

/* $NetBSD: grackle.c,v 1.19 2022/01/21 19:12:28 thorpej Exp $ */

/*-
* Copyright (c) 2000 Tsubai Masanari. 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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: grackle.c,v 1.19 2022/01/21 19:12:28 thorpej Exp $");

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

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

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

struct grackle_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 grackle_attach(device_t, device_t, void *);
static int grackle_match(device_t, cfdata_t, void *);

static pcireg_t grackle_conf_read(void *, pcitag_t, int);
static void grackle_conf_write(void *, pcitag_t, int, pcireg_t);

CFATTACH_DECL_NEW(grackle, sizeof(struct grackle_softc),
grackle_match, grackle_attach, NULL, NULL);

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

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

memset(compat, 0, sizeof(compat));
OF_getprop(ca->ca_node, "compatible", compat, sizeof(compat));
if (strcmp(compat, "grackle") != 0)
return 0;

return 1;
}

#define GRACKLE_ADDR 0xfec00000
#define GRACKLE_DATA 0xfee00000

static void
grackle_attach(device_t parent, device_t self, void *aux)
{
struct grackle_softc *sc = device_private(self);
pci_chipset_tag_t pc = &sc->sc_pc;
struct confargs *ca = aux;
struct pcibus_attach_args pba;
int len, node = ca->ca_node;
uint32_t busrange[2];
struct ranges {
uint32_t pci_hi, pci_mid, pci_lo;
uint32_t host;
uint32_t size_hi, size_lo;
} ranges[6], *rp = ranges;

aprint_normal("\n");
sc->sc_dev = self;

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

/* find i/o tag */
len = OF_getprop(node, "ranges", ranges, sizeof(ranges));
if (len == -1)
return;
while (len >= sizeof(ranges[0])) {
if ((rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) ==
OFW_PCI_PHYS_HI_SPACE_IO) {
sc->sc_iot.pbs_base = rp->host;
sc->sc_iot.pbs_limit = rp->host + rp->size_lo;
break;
}
len -= sizeof(ranges[0]);
rp++;
}

sc->sc_iot.pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_IO_TYPE;
sc->sc_iot.pbs_offset = 0;
if (ofwoea_map_space(RANGE_TYPE_PCI, RANGE_IO, node, &sc->sc_iot,
"grackle io") != 0)
panic("Can't init grackle 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,
"grackle mem") != 0)
panic("Can't init grackle mem tag");

macppc_pci_get_chipset_tag(pc);
pc->pc_node = node;
pc->pc_addr = mapiodev(GRACKLE_ADDR, 4, false);
pc->pc_data = mapiodev(GRACKLE_DATA, 4, false);
pc->pc_bus = busrange[0];
pc->pc_conf_read = grackle_conf_read;
pc->pc_conf_write = grackle_conf_write;
pc->pc_memt = &sc->sc_memt;
pc->pc_iot = &sc->sc_iot;

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)));
}

static pcireg_t
grackle_conf_read(void *cookie, pcitag_t tag, int reg)
{
pci_chipset_tag_t pc = cookie;
pcireg_t data;
int s;

if ((unsigned int)reg >= PCI_CONF_SIZE)
return (pcireg_t) -1;

s = splhigh();

out32rb(pc->pc_addr, tag | reg);
data = 0xffffffff;
if (!badaddr(pc->pc_data, 4))
data = in32rb(pc->pc_data);
out32rb(pc->pc_addr, 0);

splx(s);

return data;
}

static void
grackle_conf_write(void *cookie, pcitag_t tag, int reg, pcireg_t data)
{
pci_chipset_tag_t pc = cookie;
int s;

if ((unsigned int)reg >= PCI_CONF_SIZE)
return;

s = splhigh();

out32rb(pc->pc_addr, tag | reg);
out32rb(pc->pc_data, data);
out32rb(pc->pc_addr, 0);

splx(s);
}