NetBSD/sys/arch/macppc/pci/bandit.c

251 lines
5.9 KiB
C

/* $NetBSD: bandit.c,v 1.15 2000/02/04 07:48:11 tsubai 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/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>
struct bandit_softc {
struct device sc_dev;
struct pci_bridge sc_pc;
};
void bandit_attach __P((struct device *, struct device *, void *));
int bandit_match __P((struct device *, struct cfdata *, void *));
int bandit_print __P((void *, const char *));
pcireg_t bandit_conf_read __P((pci_chipset_tag_t, pcitag_t, int));
void bandit_conf_write __P((pci_chipset_tag_t, pcitag_t, int, pcireg_t));
static void bandit_init __P((struct bandit_softc *));
struct cfattach bandit_ca = {
sizeof(struct bandit_softc), bandit_match, bandit_attach
};
int
bandit_match(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct confargs *ca = aux;
if (strcmp(ca->ca_name, "bandit") == 0 ||
strcmp(ca->ca_name, "chaos") == 0)
return 1;
return 0;
}
void
bandit_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct bandit_softc *sc = (void *)self;
pci_chipset_tag_t pc = &sc->sc_pc;
struct confargs *ca = aux;
struct pcibus_attach_args pba;
int len, node = ca->ca_node;
u_int32_t reg[2], busrange[2];
struct ranges {
u_int32_t pci_hi, pci_mid, pci_lo;
u_int32_t host;
u_int32_t size_hi, size_lo;
} ranges[6], *rp = ranges;
printf("\n");
/* Bandit address */
if (OF_getprop(node, "reg", reg, sizeof(reg)) < 8)
return;
/* PCI bus number */
if (OF_getprop(node, "bus-range", busrange, sizeof(busrange)) != 8)
return;
pc->node = node;
pc->addr = mapiodev(reg[0] + 0x800000, 4);
pc->data = mapiodev(reg[0] + 0xc00000, 8);
pc->bus = busrange[0];
pc->conf_read = bandit_conf_read;
pc->conf_write = bandit_conf_write;
pc->memt = (bus_space_tag_t)0;
/* 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)
pc->iot = (bus_space_tag_t)rp->host;
len -= sizeof(ranges[0]);
rp++;
}
bandit_init(sc);
bzero(&pba, sizeof(pba));
pba.pba_busname = "pci";
pba.pba_memt = pc->memt;
pba.pba_iot = pc->iot;
pba.pba_dmat = &pci_bus_dma_tag;
pba.pba_bus = pc->bus;
pba.pba_pc = pc;
pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED;
config_found(self, &pba, bandit_print);
}
int
bandit_print(aux, pnp)
void *aux;
const char *pnp;
{
struct pcibus_attach_args *pa = aux;
if (pnp)
printf("%s at %s", pa->pba_busname, pnp);
printf(" bus %d", pa->pba_bus);
return UNCONF;
}
pcireg_t
bandit_conf_read(pc, tag, reg)
pci_chipset_tag_t pc;
pcitag_t tag;
int reg;
{
pcireg_t data;
int bus, dev, func, s;
u_int32_t x;
pci_decompose_tag(pc, tag, &bus, &dev, &func);
/*
* bandit's minimum device number of the first bus is 11.
* So we behave as if there is no device when dev < 11.
*/
if (func > 7)
panic("pci_conf_read: func > 7");
if (bus == pc->bus) {
if (dev < 11) {
if (reg == PCI_ID_REG)
return 0xffffffff;
else
panic("pci_conf_read: dev < 11");
}
x = (1 << dev) | (func << 8) | reg;
} else
x = tag | reg | 1;
s = splhigh();
out32rb(pc->addr, x);
DELAY(10);
data = 0xffffffff;
if (!badaddr(pc->data, 4))
data = in32rb(pc->data);
DELAY(10);
out32rb(pc->addr, 0);
DELAY(10);
splx(s);
return data;
}
void
bandit_conf_write(pc, tag, reg, data)
pci_chipset_tag_t pc;
pcitag_t tag;
int reg;
pcireg_t data;
{
int bus, dev, func, s;
u_int32_t x;
pci_decompose_tag(pc, tag, &bus, &dev, &func);
if (func > 7)
panic("pci_conf_write: func > 7");
if (bus == pc->bus) {
if (dev < 11)
panic("pci_conf_write: dev < 11");
x = (1 << dev) | (func << 8) | reg;
} else
x = tag | reg | 1;
s = splhigh();
out32rb(pc->addr, x);
DELAY(10);
out32rb(pc->data, data);
DELAY(10);
out32rb(pc->addr, 0);
DELAY(10);
splx(s);
}
#define PCI_BANDIT 11
#define PCI_REG_MODE_SELECT 0x50
#define PCI_MODE_IO_COHERENT 0x040 /* I/O coherent */
void
bandit_init(sc)
struct bandit_softc *sc;
{
pci_chipset_tag_t pc = &sc->sc_pc;
pcitag_t tag;
u_int mode;
tag = pci_make_tag(pc, pc->bus, PCI_BANDIT, 0);
if ((pci_conf_read(pc, tag, PCI_ID_REG) & 0xffff) == 0xffff)
return;
mode = pci_conf_read(pc, tag, PCI_REG_MODE_SELECT);
if ((mode & PCI_MODE_IO_COHERENT) == 0) {
mode |= PCI_MODE_IO_COHERENT;
pci_conf_write(pc, tag, PCI_REG_MODE_SELECT, mode);
}
}