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/*-
* Copyright (c) 1997, Stefan Esser <se@freebsd.org>
* Copyright (c) 2000, Michael Smith <msmith@freebsd.org>
* Copyright (c) 2000, BSDi
* Copyright (c) 2003, Thomas Moestl <tmm@FreeBSD.org>
* Copyright (c) 2005 - 2009 Marius Strobl <marius@FreeBSD.org>
* 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 unmodified, 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/sparc64/pci/ofw_pcibus.c 234160 2012-04-12 00:38:34Z nwhitehorn $");
#include "opt_ofw_pci.h"
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/libkern.h>
#include <sys/module.h>
#include <sys/pciio.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_pci.h>
#include <dev/ofw/openfirm.h>
#include <machine/bus.h>
#ifndef SUN4V
#include <machine/bus_common.h>
#include <machine/iommureg.h>
#endif
#include <machine/resource.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pci_private.h>
#include <sparc64/pci/ofw_pci.h>
#include "pcib_if.h"
#include "pci_if.h"
/* Helper functions */
static void ofw_pcibus_setup_device(device_t bridge, uint32_t clock,
u_int busno, u_int slot, u_int func);
/* Methods */
static bus_child_pnpinfo_str_t ofw_pcibus_pnpinfo_str;
static device_attach_t ofw_pcibus_attach;
static device_probe_t ofw_pcibus_probe;
static ofw_bus_get_devinfo_t ofw_pcibus_get_devinfo;
static pci_assign_interrupt_t ofw_pcibus_assign_interrupt;
static device_method_t ofw_pcibus_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ofw_pcibus_probe),
DEVMETHOD(device_attach, ofw_pcibus_attach),
/* Bus interface */
DEVMETHOD(bus_child_pnpinfo_str, ofw_pcibus_pnpinfo_str),
/* PCI interface */
DEVMETHOD(pci_assign_interrupt, ofw_pcibus_assign_interrupt),
/* ofw_bus interface */
DEVMETHOD(ofw_bus_get_devinfo, ofw_pcibus_get_devinfo),
DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
DEVMETHOD_END
};
struct ofw_pcibus_devinfo {
struct pci_devinfo opd_dinfo;
struct ofw_bus_devinfo opd_obdinfo;
};
static devclass_t pci_devclass;
DEFINE_CLASS_1(pci, ofw_pcibus_driver, ofw_pcibus_methods,
sizeof(struct pci_softc), pci_driver);
EARLY_DRIVER_MODULE(ofw_pcibus, pcib, ofw_pcibus_driver, pci_devclass, 0, 0,
BUS_PASS_BUS);
MODULE_VERSION(ofw_pcibus, 1);
MODULE_DEPEND(ofw_pcibus, pci, 1, 1, 1);
static int
ofw_pcibus_probe(device_t dev)
{
if (ofw_bus_get_node(dev) == -1)
return (ENXIO);
device_set_desc(dev, "OFW PCI bus");
return (0);
}
/*
* Perform miscellaneous setups the firmware usually does not do for us.
*/
static void
ofw_pcibus_setup_device(device_t bridge, uint32_t clock, u_int busno,
u_int slot, u_int func)
{
#define CS_READ(n, w) \
PCIB_READ_CONFIG(bridge, busno, slot, func, (n), (w))
#define CS_WRITE(n, v, w) \
PCIB_WRITE_CONFIG(bridge, busno, slot, func, (n), (v), (w))
#ifndef SUN4V
uint32_t reg;
/*
* Initialize the latency timer register for busmaster devices to
* work properly. This is another task which the firmware doesn't
* always perform. The Min_Gnt register can be used to compute its
* recommended value: it contains the desired latency in units of
* 1/4 us assuming a clock rate of 33MHz. To calculate the correct
* latency timer value, the clock frequency of the bus (defaulting
* to 33MHz) should be used and no wait states assumed.
* For bridges, we additionally set up the bridge control and the
* secondary latency registers.
*/
if ((CS_READ(PCIR_HDRTYPE, 1) & PCIM_HDRTYPE) ==
PCIM_HDRTYPE_BRIDGE) {
reg = CS_READ(PCIR_BRIDGECTL_1, 1);
reg |= PCIB_BCR_MASTER_ABORT_MODE | PCIB_BCR_SERR_ENABLE |
PCIB_BCR_PERR_ENABLE;
#ifdef OFW_PCI_DEBUG
device_printf(bridge,
"bridge %d/%d/%d: control 0x%x -> 0x%x\n",
busno, slot, func, CS_READ(PCIR_BRIDGECTL_1, 1), reg);
#endif /* OFW_PCI_DEBUG */
CS_WRITE(PCIR_BRIDGECTL_1, reg, 1);
reg = OFW_PCI_LATENCY;
#ifdef OFW_PCI_DEBUG
device_printf(bridge,
"bridge %d/%d/%d: latency timer %d -> %d\n",
busno, slot, func, CS_READ(PCIR_SECLAT_1, 1), reg);
#endif /* OFW_PCI_DEBUG */
CS_WRITE(PCIR_SECLAT_1, reg, 1);
} else {
reg = CS_READ(PCIR_MINGNT, 1);
if ((int)reg > 0) {
switch (clock) {
case 33000000:
reg *= 8;
break;
case 66000000:
reg *= 4;
break;
}
reg = min(reg, 255);
} else
reg = OFW_PCI_LATENCY;
}
#ifdef OFW_PCI_DEBUG
device_printf(bridge, "device %d/%d/%d: latency timer %d -> %d\n",
busno, slot, func, CS_READ(PCIR_LATTIMER, 1), reg);
#endif /* OFW_PCI_DEBUG */
CS_WRITE(PCIR_LATTIMER, reg, 1);
/*
* Compute a value to write into the cache line size register.
* The role of the streaming cache is unclear in write invalidate
* transfers, so it is made sure that it's line size is always
* reached. Generally, the cache line size is fixed at 64 bytes
* by Fireplane/Safari, JBus and UPA.
*/
CS_WRITE(PCIR_CACHELNSZ, STRBUF_LINESZ / sizeof(uint32_t), 1);
#endif
/*
* Ensure that ALi M5229 report the actual content of PCIR_PROGIF
* and that IDE I/O is force enabled. The former is done in order
* to have unique behavior across revisions as some default to
* hiding bits 4-6 for compliance with PCI 2.3. The latter is done
* as at least revision 0xc8 requires the PCIM_CMD_PORTEN bypass
* to be always enabled as otherwise even enabling PCIM_CMD_PORTEN
* results in an instant data access trap on Fire-based machines.
* Thus these quirks have to be handled before pci(4) adds the maps.
* Note that for older revisions bit 0 of register 0x50 enables the
* internal IDE function instead of force enabling IDE I/O.
*/
if ((CS_READ(PCIR_VENDOR, 2) == 0x10b9 &&
CS_READ(PCIR_DEVICE, 2) == 0x5229))
CS_WRITE(0x50, CS_READ(0x50, 1) | 0x3, 1);
/*
* The preset in the intline register is usually wrong. Reset
* it to 255, so that the PCI code will reroute the interrupt if
* needed.
*/
CS_WRITE(PCIR_INTLINE, PCI_INVALID_IRQ, 1);
#undef CS_READ
#undef CS_WRITE
}
static int
ofw_pcibus_attach(device_t dev)
{
device_t pcib;
struct ofw_pci_register pcir;
struct ofw_pcibus_devinfo *dinfo;
phandle_t node, child;
uint32_t clock;
u_int busno, domain, func, slot;
int error;
error = pci_attach_common(dev);
if (error)
return (error);
pcib = device_get_parent(dev);
domain = pcib_get_domain(dev);
busno = pcib_get_bus(dev);
node = ofw_bus_get_node(dev);
/*
* Add the PCI side of the host-PCI bridge itself to the bus.
* Note that we exclude the host-PCIe bridges here as these
* have no configuration space implemented themselves.
*/
if (strcmp(device_get_name(device_get_parent(pcib)), "nexus") == 0 &&
ofw_bus_get_type(pcib) != NULL &&
strcmp(ofw_bus_get_type(pcib), OFW_TYPE_PCIE) != 0 &&
(dinfo = (struct ofw_pcibus_devinfo *)pci_read_device(pcib,
domain, busno, 0, 0, sizeof(*dinfo))) != NULL) {
if (ofw_bus_gen_setup_devinfo(&dinfo->opd_obdinfo, node) != 0)
pci_freecfg((struct pci_devinfo *)dinfo);
else
pci_add_child(dev, (struct pci_devinfo *)dinfo);
}
if (OF_getprop(ofw_bus_get_node(pcib), "clock-frequency", &clock,
sizeof(clock)) == -1)
clock = 33000000;
for (child = OF_child(node); child != 0; child = OF_peer(child)) {
if (OF_getprop(child, "reg", &pcir, sizeof(pcir)) == -1)
continue;
slot = OFW_PCI_PHYS_HI_DEVICE(pcir.phys_hi);
func = OFW_PCI_PHYS_HI_FUNCTION(pcir.phys_hi);
/* Some OFW device trees contain dupes. */
if (pci_find_dbsf(domain, busno, slot, func) != NULL)
continue;
ofw_pcibus_setup_device(pcib, clock, busno, slot, func);
dinfo = (struct ofw_pcibus_devinfo *)pci_read_device(pcib,
domain, busno, slot, func, sizeof(*dinfo));
if (dinfo == NULL)
continue;
if (ofw_bus_gen_setup_devinfo(&dinfo->opd_obdinfo, child) !=
0) {
pci_freecfg((struct pci_devinfo *)dinfo);
continue;
}
pci_add_child(dev, (struct pci_devinfo *)dinfo);
OFW_PCI_SETUP_DEVICE(pcib, dinfo->opd_dinfo.cfg.dev);
}
return (bus_generic_attach(dev));
}
static int
ofw_pcibus_assign_interrupt(device_t dev, device_t child)
{
ofw_pci_intr_t intr;
int isz;
isz = OF_getprop(ofw_bus_get_node(child), "interrupts", &intr,
sizeof(intr));
if (isz != sizeof(intr)) {
/* No property; our best guess is the intpin. */
intr = pci_get_intpin(child);
#ifndef SUN4V
} else if (intr >= 255) {
/*
* A fully specified interrupt (including IGN), as present on
* SPARCengine Ultra AX and E450. Extract the INO and return
* it.
*/
return (INTINO(intr));
#endif
}
/*
* If we got intr from a property, it may or may not be an intpin.
* For on-board devices, it frequently is not, and is completely out
* of the valid intpin range. For PCI slots, it hopefully is,
* otherwise we will have trouble interfacing with non-OFW buses
* such as cardbus.
* Since we cannot tell which it is without violating layering, we
* will always use the route_interrupt method, and treat exceptions
* on the level they become apparent.
*/
return (PCIB_ROUTE_INTERRUPT(device_get_parent(dev), child, intr));
}
static const struct ofw_bus_devinfo *
ofw_pcibus_get_devinfo(device_t bus, device_t dev)
{
struct ofw_pcibus_devinfo *dinfo;
dinfo = device_get_ivars(dev);
return (&dinfo->opd_obdinfo);
}
static int
ofw_pcibus_pnpinfo_str(device_t dev, device_t child, char *buf,
size_t buflen)
{
pci_child_pnpinfo_str_method(dev, child, buf, buflen);
if (ofw_bus_get_node(child) != -1) {
strlcat(buf, " ", buflen); /* Separate info. */
ofw_bus_gen_child_pnpinfo_str(dev, child, buf, buflen);
}
return (0);
}