/* $OpenBSD: rbus_machdep.c,v 1.1 2007/08/04 16:46:03 kettenis Exp $ */
/*
* Copyright (c) 2007 Mark Kettenis
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <dev/cardbus/rbus.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_pci.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pccbbreg.h>
struct rbustag rbus_null;
/*
* The PROM doesn't really understand CardBus bridges. So it treats
* the memory and IO window register as ordinary BARs and assigns
* address space to them. We re-use that address space for rbus.
* This is a bit of a hack, but it seems to work and saves us from
* tracking down available address space globally.
*/
rbus_tag_t
rbus_pccbb_parent_mem(struct device *self, struct pci_attach_args *pa)
{
struct ofw_pci_register addr[5];
int naddr, len, i;
int space, reg;
len = OF_getprop(PCITAG_NODE(pa->pa_tag), "assigned-addresses",
&addr, sizeof(addr));
naddr = len / sizeof(struct ofw_pci_register);
for (i = 0; i < naddr; i++) {
space = addr[i].phys_hi & OFW_PCI_PHYS_HI_SPACEMASK;
if (space != OFW_PCI_PHYS_HI_SPACE_MEM32)
continue;
reg = addr[i].phys_hi & OFW_PCI_PHYS_HI_REGISTERMASK;
if (reg < PCI_CB_MEMBASE0 || reg > PCI_CB_IOLIMIT1)
continue;
return (rbus_new_root_delegate(pa->pa_memt,
addr[i].phys_lo, addr[i].size_lo, 0));
}
return &rbus_null;
}
rbus_tag_t
rbus_pccbb_parent_io(struct device *self, struct pci_attach_args *pa)
{
struct ofw_pci_register addr[5];
int naddr, len, i;
int space, reg;
len = OF_getprop(PCITAG_NODE(pa->pa_tag), "assigned-addresses",
&addr, sizeof(addr));
naddr = len / sizeof(struct ofw_pci_register);
for (i = 0; i < naddr; i++) {
space = addr[i].phys_hi & OFW_PCI_PHYS_HI_SPACEMASK;
if (space != OFW_PCI_PHYS_HI_SPACE_IO)
continue;
reg = addr[i].phys_hi & OFW_PCI_PHYS_HI_REGISTERMASK;
if (reg < PCI_CB_MEMBASE0 || reg > PCI_CB_IOLIMIT1)
continue;
return (rbus_new_root_delegate(pa->pa_iot,
addr[i].phys_lo, addr[i].size_lo, 0));
}
return &rbus_null;
}