NetBSD-5.0.2/sys/arch/prep/pci/pci_machdep.c
/* $NetBSD: pci_machdep.c,v 1.32 2007/10/17 19:56:51 garbled Exp $ */
/*
* Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
* Copyright (c) 1994 Charles M. Hannum. 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles M. Hannum.
* 4. 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.
*/
/*
* Machine-specific functions for PCI autoconfiguration.
*
* On PCs, there are two methods of generating PCI configuration cycles.
* We try to detect the appropriate mechanism for this machine and set
* up a few function pointers to access the correct method directly.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pci_machdep.c,v 1.32 2007/10/17 19:56:51 garbled Exp $");
#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/extent.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <uvm/uvm_extern.h>
#define _POWERPC_BUS_DMA_PRIVATE
#include <machine/bus.h>
#include <machine/intr.h>
#include <machine/platform.h>
#include <machine/pnp.h>
#include <dev/isa/isavar.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/pciconf.h>
/* 0 == direct 1 == indirect */
int prep_pci_config_mode = 1;
extern struct genppc_pci_chipset *genppc_pct;
extern u_int32_t prep_pci_baseaddr;
extern u_int32_t prep_pci_basedata;
static void
prep_pci_get_chipset_tag_indirect(pci_chipset_tag_t pc)
{
pc->pc_conf_v = (void *)pc;
pc->pc_attach_hook = genppc_pci_indirect_attach_hook;
pc->pc_bus_maxdevs = prep_pci_bus_maxdevs;
pc->pc_make_tag = genppc_pci_indirect_make_tag;
pc->pc_conf_read = genppc_pci_indirect_conf_read;
pc->pc_conf_write = genppc_pci_indirect_conf_write;
pc->pc_intr_v = (void *)pc;
pc->pc_intr_map = prep_pci_intr_map;
pc->pc_intr_string = genppc_pci_intr_string;
pc->pc_intr_evcnt = genppc_pci_intr_evcnt;
pc->pc_intr_establish = genppc_pci_intr_establish;
pc->pc_intr_disestablish = genppc_pci_intr_disestablish;
pc->pc_conf_interrupt = genppc_pci_conf_interrupt;
pc->pc_decompose_tag = genppc_pci_indirect_decompose_tag;
pc->pc_conf_hook = prep_pci_conf_hook;
pc->pc_addr = mapiodev(prep_pci_baseaddr, 4);
pc->pc_data = mapiodev(prep_pci_basedata, 4);
pc->pc_bus = 0;
pc->pc_node = 0;
pc->pc_memt = 0;
pc->pc_iot = 0;
}
void
prep_pci_get_chipset_tag(pci_chipset_tag_t pc)
{
int i;
i = pci_chipset_tag_type();
if (i == PCIBridgeIndirect || i == PCIBridgeRS6K) {
prep_pci_config_mode = 1;
prep_pci_get_chipset_tag_indirect(pc);
} else if (i == PCIBridgeDirect) {
prep_pci_get_chipset_tag_direct(pc);
prep_pci_config_mode = 0;
} else
panic("Unknown PCI chipset tag configuration method");
}
int
prep_pci_bus_maxdevs(pci_chipset_tag_t pc, int busno)
{
struct genppc_pci_chipset_businfo *pbi;
prop_object_t busmax;
pbi = SIMPLEQ_FIRST(&genppc_pct->pc_pbi);
while (busno--)
pbi = SIMPLEQ_NEXT(pbi, next);
if (pbi == NULL)
return 32;
busmax = prop_dictionary_get(pbi->pbi_properties,
"prep-pcibus-maxdevices");
if (busmax == NULL)
return 32;
else
return prop_number_integer_value(busmax);
return 32;
}
int
prep_pci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp)
{
struct genppc_pci_chipset_businfo *pbi;
prop_dictionary_t dict, devsub;
prop_object_t pinsub;
prop_number_t pbus;
int busno, bus, pin, line, swiz, dev, origdev, i;
char key[20];
pin = pa->pa_intrpin;
line = pa->pa_intrline;
bus = busno = pa->pa_bus;
swiz = pa->pa_intrswiz;
origdev = dev = pa->pa_device;
i = 0;
pbi = SIMPLEQ_FIRST(&genppc_pct->pc_pbi);
while (busno--)
pbi = SIMPLEQ_NEXT(pbi, next);
KASSERT(pbi != NULL);
dict = prop_dictionary_get(pbi->pbi_properties, "prep-pci-intrmap");
if (dict != NULL)
i = prop_dictionary_count(dict);
if (dict == NULL || i == 0) {
/* We have a non-PReP bus. now it gets hard */
pbus = prop_dictionary_get(pbi->pbi_properties,
"prep-pcibus-parent");
if (pbus == NULL)
goto bad;
busno = prop_number_integer_value(pbus);
pbus = prop_dictionary_get(pbi->pbi_properties,
"prep-pcibus-rawdevnum");
dev = prop_number_integer_value(pbus);
/* now that we know the parent bus, we need to find it's pbi */
pbi = SIMPLEQ_FIRST(&genppc_pct->pc_pbi);
while (busno--)
pbi = SIMPLEQ_NEXT(pbi, next);
KASSERT(pbi != NULL);
/* swizzle the pin */
pin = ((pin + origdev - 1) & 3) + 1;
/* now we have the pbi, ask for dict again */
dict = prop_dictionary_get(pbi->pbi_properties,
"prep-pci-intrmap");
if (dict == NULL)
goto bad;
}
/* No IRQ used. */
if (pin == 0)
goto bad;
if (pin > 4) {
aprint_error("pci_intr_map: bad interrupt pin %d\n", pin);
goto bad;
}
sprintf(key, "devfunc-%d", dev);
devsub = prop_dictionary_get(dict, key);
if (devsub == NULL)
goto bad;
sprintf(key, "pin-%c", 'A' + (pin-1));
pinsub = prop_dictionary_get(devsub, key);
if (pinsub == NULL)
goto bad;
line = prop_number_integer_value(pinsub);
/*
* Section 6.2.4, `Miscellaneous Functions', says that 255 means
* `unknown' or `no connection' on a PC. We assume that a device with
* `no connection' either doesn't have an interrupt (in which case the
* pin number should be 0, and would have been noticed above), or
* wasn't configured by the BIOS (in which case we punt, since there's
* no real way we can know how the interrupt lines are mapped in the
* hardware).
*
* XXX
* Since IRQ 0 is only used by the clock, and we can't actually be sure
* that the BIOS did its job, we also recognize that as meaning that
* the BIOS has not configured the device.
*/
if (line == 0 || line == 255) {
aprint_error("pci_intr_map: no mapping for pin %c\n",
'@' + pin);
goto bad;
} else {
if (line >= ICU_LEN) {
aprint_error("pci_intr_map: bad interrupt line %d\n",
line);
goto bad;
}
if (line == IRQ_SLAVE) {
aprint_verbose("pci_intr_map: changed line 2 to line 9\n");
line = 9;
}
}
*ihp = line;
return 0;
bad:
*ihp = -1;
return 1;
}
extern pcitag_t prep_pci_direct_make_tag(void *, int, int, int);
extern pcitag_t genppc_pci_indirect_make_tag(void *, int, int, int);
extern pcireg_t prep_pci_direct_conf_read(void *, pcitag_t, int);
extern pcireg_t genppc_pci_indirect_conf_read(void *, pcitag_t, int);
int
prep_pci_conf_hook(pci_chipset_tag_t pct, int bus, int dev, int func,
pcireg_t id)
{
struct genppc_pci_chipset_businfo *pbi;
prop_number_t bmax, pbus;
pcitag_t tag;
pcireg_t class;
/*
* The P9100 board found in some IBM machines cannot be
* over-configured.
*/
if (PCI_VENDOR(id) == PCI_VENDOR_WEITEK &&
PCI_PRODUCT(id) == PCI_PRODUCT_WEITEK_P9100)
return 0;
/* We have already mapped the MPIC2 if we have one, so leave it
alone */
if (PCI_VENDOR(id) == PCI_VENDOR_IBM &&
PCI_PRODUCT(id) == PCI_PRODUCT_IBM_MPIC2)
return 0;
if (PCI_VENDOR(id) == PCI_VENDOR_IBM &&
PCI_PRODUCT(id) == PCI_PRODUCT_IBM_MPIC)
return 0;
if (PCI_VENDOR(id) == PCI_VENDOR_INTEL &&
PCI_PRODUCT(id) == PCI_PRODUCT_INTEL_PCEB)
return 0;
if (PCI_VENDOR(id) == PCI_VENDOR_MOT &&
PCI_PRODUCT(id) == PCI_PRODUCT_MOT_RAVEN)
return (PCI_CONF_ALL & ~PCI_CONF_MAP_MEM);
/* NOTE, all device specific stuff must be above this line */
/* don't do this on the primary host bridge */
if (bus == 0 && dev == 0 && func == 0)
return PCI_CONF_DEFAULT;
if (prep_pci_config_mode) {
tag = genppc_pci_indirect_make_tag(pct, bus, dev, func);
class = genppc_pci_indirect_conf_read(pct, tag,
PCI_CLASS_REG);
} else {
tag = prep_pci_direct_make_tag(pct, bus, dev, func);
class = prep_pci_direct_conf_read(pct, tag,
PCI_CLASS_REG);
}
/*
* PCI bridges have special needs. We need to discover where they
* came from, and wire them appropriately.
*/
if (PCI_CLASS(class) == PCI_CLASS_BRIDGE &&
PCI_SUBCLASS(class) == PCI_SUBCLASS_BRIDGE_PCI) {
pbi = malloc(sizeof(struct genppc_pci_chipset_businfo),
M_DEVBUF, M_NOWAIT);
KASSERT(pbi != NULL);
pbi->pbi_properties = prop_dictionary_create();
KASSERT(pbi->pbi_properties != NULL);
setup_pciintr_map(pbi, bus, dev, func);
/* record the parent bus, and the parent device number */
pbus = prop_number_create_integer(bus);
prop_dictionary_set(pbi->pbi_properties, "prep-pcibus-parent",
pbus);
prop_object_release(pbus);
pbus = prop_number_create_integer(dev);
prop_dictionary_set(pbi->pbi_properties,
"prep-pcibus-rawdevnum", pbus);
prop_object_release(pbus);
/* now look for bus quirks */
if (PCI_VENDOR(id) == PCI_VENDOR_DEC &&
PCI_PRODUCT(id) == PCI_PRODUCT_DEC_21154) {
bmax = prop_number_create_integer(8);
KASSERT(bmax != NULL);
prop_dictionary_set(pbi->pbi_properties,
"prep-pcibus-maxdevices", bmax);
prop_object_release(bmax);
}
SIMPLEQ_INSERT_TAIL(&genppc_pct->pc_pbi, pbi, next);
}
return (PCI_CONF_DEFAULT);
}