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NetBSD/sys/arch/sparc64/dev/pci_machdep.c

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/* $NetBSD: pci_machdep.c,v 1.25 2001/10/17 22:16:41 thorpej 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_INTFIX 0x10
#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)
#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>
/* this is a base to be copied */
struct sparc_pci_chipset _sparc_pci_chipset = {
NULL,
};
/*
* 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 nothing */
}
int
pci_bus_maxdevs(pc, busno)
pci_chipset_tag_t pc;
int busno;
{
return 32;
}
#ifdef __PCI_BUS_DEVORDER
int
pci_bus_devorder(pc, busno, devs)
pci_chipset_tag_t pc;
int busno;
char *devs;
{
struct ofw_pci_register reg;
int node, len, device, i = 0;
u_int32_t done = 0;
#ifdef DEBUG
char name[80];
#endif
node = pc->curnode;
#ifdef DEBUG
if (sparc_pci_debug & SPDB_PROBE) {
OF_getprop(node, "name", &name, sizeof(name));
printf("pci_bus_devorder: curnode %x %s\n", node, name);
}
#endif
/*
* Initially, curnode is the root of the pci tree. As we
* attach bridges, curnode should be set to that of the bridge.
*/
for (node = OF_child(node); node; node = OF_peer(node)) {
len = OF_getproplen(node, "reg");
if (len < sizeof(reg))
continue;
if (OF_getprop(node, "reg", (void *)&reg, sizeof(reg)) != len)
panic("pci_probe_bus: OF_getprop len botch");
device = OFW_PCI_PHYS_HI_DEVICE(reg.phys_hi);
if (done & (1 << device))
continue;
devs[i++] = device;
done |= 1 << device;
#ifdef DEBUG
if (sparc_pci_debug & SPDB_PROBE) {
OF_getprop(node, "name", &name, sizeof(name));
printf("pci_bus_devorder: adding %x %s\n", node, name);
}
#endif
if (i == 32)
break;
}
if (i < 32)
devs[i] = -1;
return i;
}
#endif
#ifdef __PCI_DEV_FUNCORDER
int
pci_dev_funcorder(pc, busno, device, funcs)
pci_chipset_tag_t pc;
int busno;
int device;
char *funcs;
{
struct ofw_pci_register reg;
int node, len, i = 0;
#ifdef DEBUG
char name[80];
#endif
node = pc->curnode;
#ifdef DEBUG
if (sparc_pci_debug & SPDB_PROBE) {
OF_getprop(node, "name", &name, sizeof(name));
printf("pci_bus_funcorder: curnode %x %s\n", node, name);
}
#endif
/*
* Initially, curnode is the root of the pci tree. As we
* attach bridges, curnode should be set to that of the bridge.
*
* Note this search is almost exactly the same as pci_bus_devorder()'s,
* except that we limit the search to only those with a matching
* "device" number.
*/
for (node = OF_child(node); node; node = OF_peer(node)) {
len = OF_getproplen(node, "reg");
if (len < sizeof(reg))
continue;
if (OF_getprop(node, "reg", (void *)&reg, sizeof(reg)) != len)
panic("pci_probe_bus: OF_getprop len botch");
if (device != OFW_PCI_PHYS_HI_DEVICE(reg.phys_hi))
continue;
funcs[i++] = OFW_PCI_PHYS_HI_FUNCTION(reg.phys_hi);
#ifdef DEBUG
if (sparc_pci_debug & SPDB_PROBE) {
OF_getprop(node, "name", &name, sizeof(name));
printf("pci_bus_funcorder: adding %x %s\n", node, name);
}
#endif
if (i == 8)
break;
}
if (i < 8)
funcs[i] = -1;
return i;
}
#endif
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 *)&reg, 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);
/*
* Record the node. This has two effects:
*
* 1) We don't have to search as far.
* 2) pci_bus_devorder will scan the right bus.
*/
pc->curnode = node;
/* Enable all the different spaces for this device */
pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG,
PCI_COMMAND_MEM_ENABLE|PCI_COMMAND_MASTER_ENABLE|
PCI_COMMAND_IO_ENABLE);
DPRINTF(SPDB_PROBE, ("found node %x %s\n", node, name));
return (tag);
}
/* No device found -- return a dead tag */
return (tag);
}
/* assume we are mapped little-endian/side-effect */
pcireg_t
pci_conf_read(pc, tag, reg)
pci_chipset_tag_t pc;
pcitag_t tag;
int reg;
{
struct psycho_pbm *pp = pc->cookie;
struct psycho_softc *sc = pp->pp_sc;
pcireg_t val = (pcireg_t)~0;
DPRINTF(SPDB_CONF, ("pci_conf_read: tag %lx reg %x ",
(long)tag, reg));
if (PCITAG_NODE(tag) != -1) {
DPRINTF(SPDB_CONF, ("asi=%x addr=%qx (offset=%x) ...",
bus_type_asi[sc->sc_configtag->type],
(long long)(sc->sc_configaddr +
PCITAG_OFFSET(tag) + reg),
(int)PCITAG_OFFSET(tag) + reg));
val = bus_space_read_4(sc->sc_configtag, sc->sc_configaddr,
PCITAG_OFFSET(tag) + reg);
}
#ifdef DEBUG
else DPRINTF(SPDB_CONF, ("pci_conf_read: bogus pcitag %x\n",
(int)PCITAG_OFFSET(tag)));
#endif
DPRINTF(SPDB_CONF, (" returning %08x\n", (u_int)val));
return (val);
}
void
pci_conf_write(pc, tag, reg, data)
pci_chipset_tag_t pc;
pcitag_t tag;
int reg;
pcireg_t data;
{
struct psycho_pbm *pp = pc->cookie;
struct psycho_softc *sc = pp->pp_sc;
DPRINTF(SPDB_CONF, ("pci_conf_write: tag %lx; reg %x; data %x; ",
(long)PCITAG_OFFSET(tag), reg, (int)data));
DPRINTF(SPDB_CONF, ("asi = %x; readaddr = %qx (offset = %x)\n",
bus_type_asi[sc->sc_configtag->type],
(long long)(sc->sc_configaddr + PCITAG_OFFSET(tag) + reg),
(int)PCITAG_OFFSET(tag) + reg));
/* If we don't know it, just punt it. */
if (PCITAG_NODE(tag) == -1) {
DPRINTF(SPDB_CONF, ("pci_conf_write: bad addr"));
return;
}
bus_space_write_4(sc->sc_configtag, sc->sc_configaddr,
PCITAG_OFFSET(tag) + 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 < 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) {
printf("OF_mapintr failed\n");
}
/* 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;
return (0);
}
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));
sprintf(str, "ivec %x", ih);
DPRINTF(SPDB_INTR, ("; returning %s\n", str));
return (str);
}
const struct evcnt *
pci_intr_evcnt(pc, ih)
pci_chipset_tag_t pc;
pci_intr_handle_t ih;
{
/* XXX for now, no evcnt parent reported */
return NULL;
}
void *
pci_intr_establish(pc, ih, level, func, arg)
pci_chipset_tag_t pc;
pci_intr_handle_t ih;
int level;
int (*func) __P((void *));
void *arg;
{
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);
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 */
panic("can't disestablish PCI interrupts yet");
}
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