NetBSD-5.0.2/sys/arch/macppc/pci/bandit.c
/* $NetBSD: bandit.c,v 1.26 2007/10/17 19:55:34 garbled 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: bandit.c,v 1.26 2007/10/17 19:55:34 garbled Exp $");
#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>
#include <machine/pci_machdep.h>
#include <machine/pio.h>
struct bandit_softc {
struct device sc_dev;
struct genppc_pci_chipset sc_pc;
struct powerpc_bus_space sc_iot;
struct powerpc_bus_space sc_memt;
};
static void bandit_attach(struct device *, struct device *, void *);
static int bandit_match(struct device *, struct cfdata *, void *);
static pcireg_t bandit_conf_read(void *, pcitag_t, int);
static void bandit_conf_write(void *, pcitag_t, int, pcireg_t);
static void bandit_init(struct bandit_softc *);
CFATTACH_DECL(bandit, sizeof(struct bandit_softc),
bandit_match, bandit_attach, NULL, NULL);
static int
bandit_match(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;
}
static void
bandit_attach(struct device *parent, struct device *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;
uint32_t reg[2], busrange[2];
struct range {
uint32_t pci_hi, pci_mid, pci_lo;
uint32_t host;
uint32_t size_hi, size_lo;
} ranges[6], *rp = ranges;
aprint_normal("\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;
/* 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) {
sc->sc_iot.pbs_base = rp->host;
sc->sc_iot.pbs_limit = rp->host + rp->size_lo;
break;
}
len -= sizeof(ranges[0]);
rp++;
}
memset(&sc->sc_iot, 0, sizeof(struct powerpc_bus_space));
memset(&sc->sc_memt, 0, sizeof(struct powerpc_bus_space));
sc->sc_iot.pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_IO_TYPE;
if (ofwoea_map_space(RANGE_TYPE_PCI, RANGE_IO, node, &sc->sc_iot,
"bandit io-space") != 0)
panic("Can't init bandit io tag");
sc->sc_memt.pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE;
if (ofwoea_map_space(RANGE_TYPE_PCI, RANGE_MEM, node, &sc->sc_memt,
"bandit mem-space") != 0)
panic("Can't init bandit mem tag");
macppc_pci_get_chipset_tag(pc);
pc->pc_node = node;
pc->pc_iot = &sc->sc_iot;
pc->pc_memt = &sc->sc_memt;
pc->pc_addr = mapiodev(reg[0] + 0x800000, 4);
pc->pc_data = mapiodev(reg[0] + 0xc00000, 8);
pc->pc_bus = busrange[0];
pc->pc_conf_read = bandit_conf_read;
pc->pc_conf_write = bandit_conf_write;
bandit_init(sc);
memset(&pba, 0, sizeof(pba));
pba.pba_memt = pc->pc_memt;
pba.pba_iot = pc->pc_iot;
pba.pba_dmat = &pci_bus_dma_tag;
pba.pba_dmat64 = NULL;
pba.pba_bus = pc->pc_bus;
pba.pba_bridgetag = NULL;
pba.pba_pc = pc;
pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED;
config_found_ia(self, "pcibus", &pba, pcibusprint);
}
static pcireg_t
bandit_conf_read(void *cookie, pcitag_t tag, int reg)
{
pci_chipset_tag_t pc = cookie;
pcireg_t data;
int bus, dev, func, s;
uint32_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->pc_bus) {
if (dev < 11)
return 0xffffffff;
x = (1 << dev) | (func << 8) | reg;
} else
x = tag | reg | 1;
s = splhigh();
out32rb(pc->pc_addr, x);
DELAY(10);
data = 0xffffffff;
if (!badaddr(pc->pc_data, 4))
data = in32rb(pc->pc_data);
DELAY(10);
out32rb(pc->pc_addr, 0);
DELAY(10);
splx(s);
return data;
}
static void
bandit_conf_write(void *cookie, pcitag_t tag, int reg, pcireg_t data)
{
pci_chipset_tag_t pc = cookie;
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->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->pc_addr, x);
DELAY(10);
out32rb(pc->pc_data, data);
DELAY(10);
out32rb(pc->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 */
static void
bandit_init(struct bandit_softc *sc)
{
pci_chipset_tag_t pc = &sc->sc_pc;
pcitag_t tag;
u_int mode;
tag = pci_make_tag(pc, 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);
}
}