/* $OpenBSD: pci_machdep.c,v 1.30 2007/08/04 16:39:15 kettenis Exp $ */
/* $NetBSD: pci_machdep.c,v 1.22 2001/07/20 00:07:13 eeh Exp $ */
/*
* Copyright (c) 1999, 2000 Matthew R. Green
* 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.
*/
/*
* functions expected by the MI PCI code.
*/
#ifdef DEBUG
#define SPDB_CONF 0x01
#define SPDB_INTR 0x04
#define SPDB_INTMAP 0x08
#define SPDB_PROBE 0x20
int sparc_pci_debug = 0x0;
#define DPRINTF(l, s) do { if (sparc_pci_debug & l) printf s; } while (0)
#else
#define DPRINTF(l, s) do { } while (0)
#endif
#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/device.h>
#include <sys/malloc.h>
#define _SPARC_BUS_DMA_PRIVATE
#include <machine/bus.h>
#include <machine/autoconf.h>
#include <machine/openfirm.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/ofw/ofw_pci.h>
#include <sparc64/dev/iommureg.h>
#include <sparc64/dev/iommuvar.h>
#include <sparc64/dev/psychoreg.h>
#include <sparc64/dev/psychovar.h>
#include <sparc64/sparc64/cache.h>
/* this is a base to be copied */
struct sparc_pci_chipset _sparc_pci_chipset = {
NULL,
};
static int pci_bus_frequency(int node);
/*
* functions provided to the MI code.
*/
void
pci_attach_hook(parent, self, pba)
struct device *parent;
struct device *self;
struct pcibus_attach_args *pba;
{
/* Don't do anything */
}
int
pci_bus_maxdevs(pc, busno)
pci_chipset_tag_t pc;
int busno;
{
return 32;
}
pcitag_t
pci_make_tag(pc, b, d, f)
pci_chipset_tag_t pc;
int b;
int d;
int f;
{
struct ofw_pci_register reg;
pcitag_t tag;
int busrange[2];
int node, len;
#ifdef DEBUG
char name[80];
bzero(name, sizeof(name));
#endif
/*
* Hunt for the node that corresponds to this device
*
* We could cache this info in an array in the parent
* device... except then we have problems with devices
* attached below pci-pci bridges, and we would need to
* add special code to the pci-pci bridge to cache this
* info.
*/
tag = PCITAG_CREATE(-1, b, d, f);
node = pc->rootnode;
/*
* First make sure we're on the right bus. If our parent
* has a bus-range property and we're not in the range,
* then we're obviously on the wrong bus. So go up one
* level.
*/
#ifdef DEBUG
if (sparc_pci_debug & SPDB_PROBE) {
OF_getprop(node, "name", &name, sizeof(name));
printf("curnode %x %s\n", node, name);
}
#endif
#if 0
while ((OF_getprop(OF_parent(node), "bus-range", (void *)&busrange,
sizeof(busrange)) == sizeof(busrange)) &&
(b < busrange[0] || b > busrange[1])) {
/* Out of range, go up one */
node = OF_parent(node);
#ifdef DEBUG
if (sparc_pci_debug & SPDB_PROBE) {
OF_getprop(node, "name", &name, sizeof(name));
printf("going up to node %x %s\n", node, name);
}
#endif
}
#endif
/*
* Now traverse all peers until we find the node or we find
* the right bridge.
*
* XXX We go up one and down one to make sure nobody's missed.
* but this should not be necessary.
*/
for (node = ((node)); node; node = OF_peer(node)) {
#ifdef DEBUG
if (sparc_pci_debug & SPDB_PROBE) {
OF_getprop(node, "name", &name, sizeof(name));
printf("checking node %x %s\n", node, name);
}
#endif
#if 1
/*
* Check for PCI-PCI bridges. If the device we want is
* in the bus-range for that bridge, work our way down.
*/
while ((OF_getprop(node, "bus-range", (void *)&busrange,
sizeof(busrange)) == sizeof(busrange)) &&
(b >= busrange[0] && b <= busrange[1])) {
/* Go down 1 level */
node = OF_child(node);
#ifdef DEBUG
if (sparc_pci_debug & SPDB_PROBE) {
OF_getprop(node, "name", &name, sizeof(name));
printf("going down to node %x %s\n",
node, name);
}
#endif
}
#endif
/*
* We only really need the first `reg' property.
*
* For simplicity, we'll query the `reg' when we
* need it. Otherwise we could malloc() it, but
* that gets more complicated.
*/
len = OF_getproplen(node, "reg");
if (len < sizeof(reg))
continue;
if (OF_getprop(node, "reg", (void *)®, sizeof(reg)) != len)
panic("pci_probe_bus: OF_getprop len botch");
if (b != OFW_PCI_PHYS_HI_BUS(reg.phys_hi))
continue;
if (d != OFW_PCI_PHYS_HI_DEVICE(reg.phys_hi))
continue;
if (f != OFW_PCI_PHYS_HI_FUNCTION(reg.phys_hi))
continue;
/* Got a match */
tag = PCITAG_CREATE(node, b, d, f);
return (tag);
}
/* No device found -- return a dead tag */
return (tag);
}
void
pci_decompose_tag(pc, tag, bp, dp, fp)
pci_chipset_tag_t pc;
pcitag_t tag;
int *bp, *dp, *fp;
{
if (bp != NULL)
*bp = PCITAG_BUS(tag);
if (dp != NULL)
*dp = PCITAG_DEV(tag);
if (fp != NULL)
*fp = PCITAG_FUN(tag);
}
static int
pci_bus_frequency(int node)
{
int len, bus_frequency;
len = OF_getproplen(node, "clock-frequency");
if (len < sizeof(bus_frequency)) {
DPRINTF(SPDB_PROBE,
("pci_bus_frequency: clock-frequency len %d too small\n",
len));
return 33;
}
if (OF_getprop(node, "clock-frequency", &bus_frequency,
sizeof(bus_frequency)) != len) {
DPRINTF(SPDB_PROBE,
("pci_bus_frequency: could not read clock-frequency\n"));
return 33;
}
return bus_frequency / 1000000;
}
int
sparc64_pci_enumerate_bus(struct pci_softc *sc,
int (*match)(struct pci_attach_args *), struct pci_attach_args *pap)
{
struct ofw_pci_register reg;
pci_chipset_tag_t pc = sc->sc_pc;
pcitag_t tag;
pcireg_t class, csr, bhlc, ic;
int node, b, d, f, ret;
int bus_frequency, lt, cl, cacheline;
char name[30];
if (sc->sc_bridgetag)
node = PCITAG_NODE(*sc->sc_bridgetag);
else
node = pc->rootnode;
bus_frequency = pci_bus_frequency(node);
/*
* Make sure the cache line size is at least as big as the
* ecache line and the streaming cache (64 byte).
*/
cacheline = max(cacheinfo.ec_linesize, 64);
KASSERT((cacheline/64)*64 == cacheline &&
(cacheline/cacheinfo.ec_linesize)*cacheinfo.ec_linesize == cacheline &&
(cacheline/4)*4 == cacheline);
for (node = OF_child(node); node != 0 && node != -1;
node = OF_peer(node)) {
name[0] = name[29] = 0;
OF_getprop(node, "name", name, sizeof(name));
if (OF_getprop(node, "class-code", &class, sizeof(class)) !=
sizeof(class))
continue;
if (OF_getprop(node, "reg", ®, sizeof(reg)) < sizeof(reg))
panic("pci_enumerate_bus: \"%s\" regs too small", name);
b = OFW_PCI_PHYS_HI_BUS(reg.phys_hi);
d = OFW_PCI_PHYS_HI_DEVICE(reg.phys_hi);
f = OFW_PCI_PHYS_HI_FUNCTION(reg.phys_hi);
if (sc->sc_bus != b) {
printf("%s: WARNING: incorrect bus # for \"%s\" "
"(%d/%d/%d)\n", sc->sc_dev.dv_xname, name, b, d, f);
continue;
}
tag = PCITAG_CREATE(node, b, d, f);
/*
* Turn on parity and fast-back-to-back for the device.
*/
csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG);
if (csr & PCI_STATUS_BACKTOBACK_SUPPORT)
csr |= PCI_COMMAND_BACKTOBACK_ENABLE;
csr |= PCI_COMMAND_PARITY_ENABLE;
pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, csr);
/*
* Initialize the latency timer register for busmaster
* devices to work properly.
* latency-timer = min-grant * bus-freq / 4 (from FreeBSD)
* Also initialize the cache line size register.
* Solaris anytime sets this register to the value 0x10.
*/
bhlc = pci_conf_read(pc, tag, PCI_BHLC_REG);
ic = pci_conf_read(pc, tag, PCI_INTERRUPT_REG);
lt = min(PCI_MIN_GNT(ic) * bus_frequency / 4, 255);
if (lt == 0 || lt < PCI_LATTIMER(bhlc))
lt = PCI_LATTIMER(bhlc);
cl = PCI_CACHELINE(bhlc);
if (cl == 0)
cl = cacheline;
bhlc &= ~((PCI_LATTIMER_MASK << PCI_LATTIMER_SHIFT) |
(PCI_CACHELINE_MASK << PCI_CACHELINE_SHIFT));
bhlc |= (lt << PCI_LATTIMER_SHIFT) |
(cl << PCI_CACHELINE_SHIFT);
pci_conf_write(pc, tag, PCI_BHLC_REG, bhlc);
ret = pci_probe_device(sc, tag, match, pap);
if (match != NULL && ret != 0)
return (ret);
}
return (0);
}
/* assume we are mapped little-endian/side-effect */
pcireg_t
pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg)
{
pcireg_t val = (pcireg_t)~0;
DPRINTF(SPDB_CONF, ("pci_conf_read: tag %lx reg %x ",
(long)PCITAG_OFFSET(tag), reg));
if (PCITAG_NODE(tag) != -1) {
val = bus_space_read_4(pc->bustag, pc->bushandle,
(PCITAG_OFFSET(tag) << pc->tagshift) + reg);
} else
DPRINTF(SPDB_CONF, ("pci_conf_read: bogus pcitag %x\n",
(int)PCITAG_OFFSET(tag)));
DPRINTF(SPDB_CONF, (" returning %08x\n", (u_int)val));
return (val);
}
void
pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t data)
{
DPRINTF(SPDB_CONF, ("pci_conf_write: tag %lx; reg %x; data %x; ",
(long)PCITAG_OFFSET(tag), reg, (int)data));
/* If we don't know it, just punt. */
if (PCITAG_NODE(tag) == -1) {
DPRINTF(SPDB_CONF, ("pci_config_write: bad addr"));
return;
}
bus_space_write_4(pc->bustag, pc->bushandle,
(PCITAG_OFFSET(tag) << pc->tagshift) + reg, data);
}
/*
* interrupt mapping foo.
* XXX: how does this deal with multiple interrupts for a device?
*/
int
pci_intr_map(pa, ihp)
struct pci_attach_args *pa;
pci_intr_handle_t *ihp;
{
pcitag_t tag = pa->pa_tag;
int interrupts;
int len, node = PCITAG_NODE(tag);
char devtype[30];
len = OF_getproplen(node, "interrupts");
if (len < 0 || len < sizeof(interrupts)) {
DPRINTF(SPDB_INTMAP,
("pci_intr_map: interrupts len %d too small\n", len));
return (ENODEV);
}
if (OF_getprop(node, "interrupts", (void *)&interrupts,
sizeof(interrupts)) != len) {
DPRINTF(SPDB_INTMAP,
("pci_intr_map: could not read interrupts\n"));
return (ENODEV);
}
if (OF_mapintr(node, &interrupts, sizeof(interrupts),
sizeof(interrupts)) < 0) {
interrupts = -1;
}
/* Try to find an IPL for this type of device. */
if (OF_getprop(node, "device_type", &devtype, sizeof(devtype)) > 0) {
for (len = 0; intrmap[len].in_class; len++)
if (strcmp(intrmap[len].in_class, devtype) == 0) {
interrupts |= INTLEVENCODE(intrmap[len].in_lev);
break;
}
}
/* XXXX -- we use the ino. What if there is a valid IGN? */
*ihp = interrupts;
if (pa->pa_pc->intr_map)
return ((*pa->pa_pc->intr_map)(pa, ihp));
else
return (0);
}
int
pci_intr_line(pci_intr_handle_t ih)
{
return (ih);
}
const char *
pci_intr_string(pc, ih)
pci_chipset_tag_t pc;
pci_intr_handle_t ih;
{
static char str[16];
DPRINTF(SPDB_INTR, ("pci_intr_string: ih %u", ih));
snprintf(str, sizeof str, "ivec 0x%x", INTVEC(ih));
DPRINTF(SPDB_INTR, ("; returning %s\n", str));
return (str);
}
void *
pci_intr_establish(pc, ih, level, func, arg, what)
pci_chipset_tag_t pc;
pci_intr_handle_t ih;
int level;
int (*func)(void *);
void *arg;
char *what;
{
void *cookie;
struct psycho_pbm *pp = (struct psycho_pbm *)pc->cookie;
DPRINTF(SPDB_INTR, ("pci_intr_establish: ih %lu; level %d",
(u_long)ih, level));
cookie = bus_intr_establish(pp->pp_memt, ih, level, 0, func, arg, what);
DPRINTF(SPDB_INTR, ("; returning handle %p\n", cookie));
return (cookie);
}
void
pci_intr_disestablish(pc, cookie)
pci_chipset_tag_t pc;
void *cookie;
{
DPRINTF(SPDB_INTR, ("pci_intr_disestablish: cookie %p\n", cookie));
/* XXX */
printf("can't disestablish PCI interrupts yet\n");
}
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