freebsd-dev/sys/powerpc/powermac/grackle.c

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/*
* Copyright 2003 by Peter Grehan. 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_pci.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <machine/bus.h>
#include <machine/md_var.h>
#include <machine/nexusvar.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <powerpc/ofw/ofw_pci.h>
#include <powerpc/powermac/gracklevar.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include "pcib_if.h"
/*
* Device interface.
*/
static int grackle_probe(device_t);
static int grackle_attach(device_t);
/*
* Bus interface.
*/
static int grackle_read_ivar(device_t, device_t, int,
uintptr_t *);
static struct resource * grackle_alloc_resource(device_t bus,
device_t child, int type, int *rid, u_long start,
u_long end, u_long count, u_int flags);
static int grackle_release_resource(device_t bus, device_t child,
int type, int rid, struct resource *res);
static int grackle_activate_resource(device_t bus, device_t child,
int type, int rid, struct resource *res);
static int grackle_deactivate_resource(device_t bus,
device_t child, int type, int rid,
struct resource *res);
/*
* pcib interface.
*/
static int grackle_maxslots(device_t);
static u_int32_t grackle_read_config(device_t, u_int, u_int, u_int,
u_int, int);
static void grackle_write_config(device_t, u_int, u_int, u_int,
u_int, u_int32_t, int);
static int grackle_route_interrupt(device_t, device_t, int);
/*
* Local routines.
*/
static int grackle_enable_config(struct grackle_softc *, u_int,
u_int, u_int, u_int);
static void grackle_disable_config(struct grackle_softc *);
/*
* Driver methods.
*/
static device_method_t grackle_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, grackle_probe),
DEVMETHOD(device_attach, grackle_attach),
/* Bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
DEVMETHOD(bus_read_ivar, grackle_read_ivar),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
DEVMETHOD(bus_alloc_resource, grackle_alloc_resource),
DEVMETHOD(bus_release_resource, grackle_release_resource),
DEVMETHOD(bus_activate_resource, grackle_activate_resource),
DEVMETHOD(bus_deactivate_resource, grackle_deactivate_resource),
/* pcib interface */
DEVMETHOD(pcib_maxslots, grackle_maxslots),
DEVMETHOD(pcib_read_config, grackle_read_config),
DEVMETHOD(pcib_write_config, grackle_write_config),
DEVMETHOD(pcib_route_interrupt, grackle_route_interrupt),
{ 0, 0 }
};
static driver_t grackle_driver = {
"pcib",
grackle_methods,
sizeof(struct grackle_softc)
};
static devclass_t grackle_devclass;
DRIVER_MODULE(grackle, nexus, grackle_driver, grackle_devclass, 0, 0);
static int
grackle_probe(device_t dev)
{
char *type, *compatible;
type = nexus_get_device_type(dev);
compatible = nexus_get_compatible(dev);
if (type == NULL || compatible == NULL)
return (ENXIO);
if (strcmp(type, "pci") != 0 || strcmp(compatible, "grackle") != 0)
return (ENXIO);
device_set_desc(dev, "MPC106 (Grackle) Host-PCI bridge");
return (0);
}
static int
grackle_attach(device_t dev)
{
struct grackle_softc *sc;
phandle_t node;
u_int32_t busrange[2];
struct grackle_range *rp, *io, *mem[2];
int nmem, i;
node = nexus_get_node(dev);
sc = device_get_softc(dev);
if (OF_getprop(node, "bus-range", busrange, sizeof(busrange)) != 8)
return (ENXIO);
sc->sc_dev = dev;
sc->sc_node = node;
sc->sc_bus = busrange[0];
/*
* The Grackle PCI config addr/data registers are actually in
* PCI space, but since they are needed to actually probe the
* PCI bus, use the fact that they are also available directly
* on the processor bus and map them
*/
sc->sc_addr = (vm_offset_t)pmap_mapdev(GRACKLE_ADDR, PAGE_SIZE);
sc->sc_data = (vm_offset_t)pmap_mapdev(GRACKLE_DATA, PAGE_SIZE);
bzero(sc->sc_range, sizeof(sc->sc_range));
sc->sc_nrange = OF_getprop(node, "ranges", sc->sc_range,
sizeof(sc->sc_range));
if (sc->sc_nrange == -1) {
device_printf(dev, "could not get ranges\n");
return (ENXIO);
}
sc->sc_range[6].pci_hi = 0;
io = NULL;
nmem = 0;
for (rp = sc->sc_range; rp->pci_hi != 0; rp++) {
switch (rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) {
case OFW_PCI_PHYS_HI_SPACE_CONFIG:
break;
case OFW_PCI_PHYS_HI_SPACE_IO:
io = rp;
break;
case OFW_PCI_PHYS_HI_SPACE_MEM32:
mem[nmem] = rp;
nmem++;
break;
case OFW_PCI_PHYS_HI_SPACE_MEM64:
break;
}
}
if (io == NULL) {
device_printf(dev, "can't find io range\n");
return (ENXIO);
}
sc->sc_io_rman.rm_type = RMAN_ARRAY;
sc->sc_io_rman.rm_descr = "Grackle PCI I/O Ports";
sc->sc_iostart = io->pci_iospace;
if (rman_init(&sc->sc_io_rman) != 0 ||
rman_manage_region(&sc->sc_io_rman, io->pci_lo,
io->pci_lo + io->size_lo) != 0) {
device_printf(dev, "failed to set up io range management\n");
return (ENXIO);
}
if (nmem == 0) {
device_printf(dev, "can't find mem ranges\n");
return (ENXIO);
}
sc->sc_mem_rman.rm_type = RMAN_ARRAY;
sc->sc_mem_rman.rm_descr = "Grackle PCI Memory";
if (rman_init(&sc->sc_mem_rman) != 0) {
device_printf(dev,
"failed to init mem range resources\n");
return (ENXIO);
}
for (i = 0; i < nmem; i++) {
if (rman_manage_region(&sc->sc_mem_rman, mem[i]->pci_lo,
mem[i]->pci_lo + mem[i]->size_lo) != 0) {
device_printf(dev,
"failed to set up memory range management\n");
return (ENXIO);
}
}
/*
* Write out the correct PIC interrupt values to config space
* of all devices on the bus.
*/
ofw_pci_fixup(dev, sc->sc_bus, sc->sc_node);
device_add_child(dev, "pci", device_get_unit(dev));
return (bus_generic_attach(dev));
}
static int
grackle_maxslots(device_t dev)
{
return (PCI_SLOTMAX);
}
static u_int32_t
grackle_read_config(device_t dev, u_int bus, u_int slot, u_int func, u_int reg,
int width)
{
struct grackle_softc *sc;
vm_offset_t caoff;
u_int32_t retval = 0xffffffff;
sc = device_get_softc(dev);
caoff = sc->sc_data + (reg & 0x03);
if (grackle_enable_config(sc, bus, slot, func, reg) != 0) {
/*
* Config probes to non-existent devices on the
* secondary bus generates machine checks. Be sure
* to catch these.
*/
if (bus > 0) {
if (badaddr(sc->sc_data, 4)) {
return (retval);
}
}
switch (width) {
case 1:
retval = (in8rb(caoff));
break;
case 2:
retval = (in16rb(caoff));
break;
case 4:
retval = (in32rb(caoff));
break;
}
}
grackle_disable_config(sc);
return (retval);
}
static void
grackle_write_config(device_t dev, u_int bus, u_int slot, u_int func,
u_int reg, u_int32_t val, int width)
{
struct grackle_softc *sc;
vm_offset_t caoff;
sc = device_get_softc(dev);
caoff = sc->sc_data + (reg & 0x03);
if (grackle_enable_config(sc, bus, slot, func, reg)) {
switch (width) {
case 1:
out8rb(caoff, val);
(void)in8rb(caoff);
break;
case 2:
out16rb(caoff, val);
(void)in16rb(caoff);
break;
case 4:
out32rb(caoff, val);
(void)in32rb(caoff);
break;
}
}
grackle_disable_config(sc);
}
static int
grackle_route_interrupt(device_t bus, device_t dev, int pin)
{
return (0);
}
static int
grackle_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
struct grackle_softc *sc;
sc = device_get_softc(dev);
switch (which) {
case PCIB_IVAR_BUS:
*result = sc->sc_bus;
return (0);
break;
}
return (ENOENT);
}
static struct resource *
grackle_alloc_resource(device_t bus, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct grackle_softc *sc;
struct resource *rv;
struct rman *rm;
bus_space_tag_t bt;
int needactivate;
needactivate = flags & RF_ACTIVE;
flags &= ~RF_ACTIVE;
sc = device_get_softc(bus);
switch (type) {
case SYS_RES_MEMORY:
rm = &sc->sc_mem_rman;
bt = PPC_BUS_SPACE_MEM;
break;
case SYS_RES_IOPORT:
rm = &sc->sc_io_rman;
bt = PPC_BUS_SPACE_IO;
break;
case SYS_RES_IRQ:
return (bus_alloc_resource(bus, type, rid, start, end, count,
flags));
break;
default:
device_printf(bus, "unknown resource request from %s\n",
device_get_nameunit(child));
return (NULL);
}
rv = rman_reserve_resource(rm, start, end, count, flags, child);
if (rv == NULL) {
device_printf(bus, "failed to reserve resource for %s\n",
device_get_nameunit(child));
return (NULL);
}
rman_set_bustag(rv, bt);
rman_set_bushandle(rv, rman_get_start(rv));
if (needactivate) {
if (bus_activate_resource(child, type, *rid, rv) != 0) {
device_printf(bus,
"failed to activate resource for %s\n",
device_get_nameunit(child));
rman_release_resource(rv);
return (NULL);
}
}
return (rv);
}
static int
grackle_release_resource(device_t bus, device_t child, int type, int rid,
struct resource *res)
{
if (rman_get_flags(res) & RF_ACTIVE) {
int error = bus_deactivate_resource(child, type, rid, res);
if (error)
return error;
}
return (rman_release_resource(res));
}
static int
grackle_activate_resource(device_t bus, device_t child, int type, int rid,
struct resource *res)
{
struct grackle_softc *sc;
void *p;
sc = device_get_softc(bus);
if (type == SYS_RES_IRQ) {
return (bus_activate_resource(bus, type, rid, res));
}
if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
vm_offset_t start;
start = (vm_offset_t)rman_get_start(res);
/*
* For i/o-ports, convert the start address to the
* MPC106 PCI i/o window
*/
if (type == SYS_RES_IOPORT)
start += sc->sc_iostart;
if (bootverbose)
printf("grackle mapdev: start %x, len %x\n", start,
rman_get_size(res));
p = pmap_mapdev(start, (vm_size_t)rman_get_size(res));
if (p == NULL)
return (ENOMEM);
rman_set_virtual(res, p);
rman_set_bushandle(res, (u_long)p);
}
return (rman_activate_resource(res));
}
static int
grackle_deactivate_resource(device_t bus, device_t child, int type, int rid,
struct resource *res)
{
/*
* If this is a memory resource, unmap it.
*/
if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) {
u_int32_t psize;
psize = rman_get_size(res);
pmap_unmapdev((vm_offset_t)rman_get_virtual(res), psize);
}
return (rman_deactivate_resource(res));
}
static int
grackle_enable_config(struct grackle_softc *sc, u_int bus, u_int slot,
u_int func, u_int reg)
{
u_int32_t cfgval;
/*
* Unlike UniNorth, the format of the config word is the same
* for local (0) and remote busses.
*/
cfgval = (bus << 16) | (slot << 11) | (func << 8) | (reg & 0xFC)
| GRACKLE_CFG_ENABLE;
out32rb(sc->sc_addr, cfgval);
(void) in32rb(sc->sc_addr);
return (1);
}
static void
grackle_disable_config(struct grackle_softc *sc)
{
/*
* Clear the GRACKLE_CFG_ENABLE bit to prevent stray
* accesses from causing config cycles
*/
out32rb(sc->sc_addr, 0);
}
/*
* Driver to swallow Grackle host bridges from the PCI bus side.
* Same as the UniNorth 'swallower', so whoever probes first will win out.
* Maybe the UniNorth/Grackle code should be consolidated.
*/
static int
grackle_hb_probe(device_t dev)
{
if (pci_get_class(dev) == PCIC_BRIDGE &&
pci_get_subclass(dev) == PCIS_BRIDGE_HOST) {
device_set_desc(dev, "Host to PCI bridge");
device_quiet(dev);
return (-10000);
}
return (ENXIO);
}
static int
grackle_hb_attach(device_t dev)
{
return (0);
}
static device_method_t grackle_hb_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, grackle_hb_probe),
DEVMETHOD(device_attach, grackle_hb_attach),
{ 0, 0 }
};
static driver_t grackle_hb_driver = {
"grackle_hb",
grackle_hb_methods,
1,
};
static devclass_t grackle_hb_devclass;
DRIVER_MODULE(grackle_hb, pci, grackle_hb_driver, grackle_hb_devclass, 0, 0);