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/*-
* Copyright (c) 2000, 2001 Michael Smith
* Copyright (c) 2000 BSDi
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*/
/*
* 6.7 : Hardware Abstraction
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <contrib/dev/acpica/include/acpi.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <machine/iodev.h>
#include <machine/pci_cfgreg.h>
#include <dev/acpica/acpivar.h>
#include <dev/pci/pcireg.h>
/*
* ACPICA's rather gung-ho approach to hardware resource ownership is a little
* troublesome insofar as there is no easy way for us to know in advance
* exactly which I/O resources it's going to want to use.
*
* In order to deal with this, we ignore resource ownership entirely, and simply
* use the native I/O space accessor functionality. This is Evil, but it works.
*/
ACPI_STATUS
AcpiOsReadPort(ACPI_IO_ADDRESS InPort, UINT32 *Value, UINT32 Width)
{
switch (Width) {
case 8:
*Value = iodev_read_1(InPort);
break;
case 16:
*Value = iodev_read_2(InPort);
break;
case 32:
*Value = iodev_read_4(InPort);
break;
}
return (AE_OK);
}
ACPI_STATUS
AcpiOsWritePort(ACPI_IO_ADDRESS OutPort, UINT32 Value, UINT32 Width)
{
switch (Width) {
case 8:
iodev_write_1(OutPort, Value);
break;
case 16:
iodev_write_2(OutPort, Value);
break;
case 32:
iodev_write_4(OutPort, Value);
break;
}
return (AE_OK);
}
ACPI_STATUS
AcpiOsReadPciConfiguration(ACPI_PCI_ID *PciId, UINT32 Register, void *Value,
UINT32 Width)
{
if (Width == 64)
return (AE_SUPPORT);
if (!pci_cfgregopen())
return (AE_NOT_EXIST);
*(UINT64 *)Value = pci_cfgregread(PciId->Bus, PciId->Device,
PciId->Function, Register, Width / 8);
return (AE_OK);
}
ACPI_STATUS
AcpiOsWritePciConfiguration (ACPI_PCI_ID *PciId, UINT32 Register,
UINT64 Value, UINT32 Width)
{
if (Width == 64)
return (AE_SUPPORT);
if (!pci_cfgregopen())
return (AE_NOT_EXIST);
pci_cfgregwrite(PciId->Bus, PciId->Device, PciId->Function, Register,
Value, Width / 8);
return (AE_OK);
}
/*
* Depth-first recursive case for finding the bus, given the slot/function.
*/
static int
acpi_bus_number(ACPI_HANDLE root, ACPI_HANDLE curr, ACPI_PCI_ID *PciId)
{
ACPI_HANDLE parent;
ACPI_STATUS status;
ACPI_OBJECT_TYPE type;
UINT32 adr;
int bus, slot, func, class, subclass, header;
/* Try to get the _BBN object of the root, otherwise assume it is 0. */
bus = 0;
if (root == curr) {
status = acpi_GetInteger(root, "_BBN", &bus);
if (ACPI_FAILURE(status) && bootverbose)
printf("acpi_bus_number: root bus has no _BBN, assuming 0\n");
return (bus);
}
status = AcpiGetParent(curr, &parent);
if (ACPI_FAILURE(status))
return (bus);
/* First, recurse up the tree until we find the host bus. */
bus = acpi_bus_number(root, parent, PciId);
/* Validate parent bus device type. */
if (ACPI_FAILURE(AcpiGetType(parent, &type)) || type != ACPI_TYPE_DEVICE) {
printf("acpi_bus_number: not a device, type %d\n", type);
return (bus);
}
/* Get the parent's slot and function. */
status = acpi_GetInteger(parent, "_ADR", &adr);
if (ACPI_FAILURE(status))
return (bus);
slot = ACPI_HIWORD(adr);
func = ACPI_LOWORD(adr);
/* Is this a PCI-PCI or Cardbus-PCI bridge? */
class = pci_cfgregread(bus, slot, func, PCIR_CLASS, 1);
if (class != PCIC_BRIDGE)
return (bus);
subclass = pci_cfgregread(bus, slot, func, PCIR_SUBCLASS, 1);
/* Find the header type, masking off the multifunction bit. */
header = pci_cfgregread(bus, slot, func, PCIR_HDRTYPE, 1) & PCIM_HDRTYPE;
if (header == PCIM_HDRTYPE_BRIDGE && subclass == PCIS_BRIDGE_PCI)
bus = pci_cfgregread(bus, slot, func, PCIR_SECBUS_1, 1);
else if (header == PCIM_HDRTYPE_CARDBUS && subclass == PCIS_BRIDGE_CARDBUS)
bus = pci_cfgregread(bus, slot, func, PCIR_SECBUS_2, 1);
return (bus);
}
/*
* Find the bus number for a device
*
* Device: handle for the PCI root bridge device
* Region: handle for the PCI configuration space operation region
* PciId: pointer to device slot and function, we fill out bus
*/
void
AcpiOsDerivePciId(ACPI_HANDLE Device, ACPI_HANDLE Region, ACPI_PCI_ID **PciId)
{
ACPI_HANDLE parent;
ACPI_STATUS status;
int bus;
if (pci_cfgregopen() == 0)
panic("AcpiOsDerivePciId unable to initialize pci bus");
/* Try to read _BBN for bus number if we're at the root. */
bus = 0;
if (Device == Region) {
status = acpi_GetInteger(Device, "_BBN", &bus);
if (ACPI_FAILURE(status) && bootverbose)
printf("AcpiOsDerivePciId: root bus has no _BBN, assuming 0\n");
}
/* Get the parent handle and call the recursive case. */
if (ACPI_SUCCESS(AcpiGetParent(Region, &parent)))
bus = acpi_bus_number(Device, parent, *PciId);
(*PciId)->Bus = bus;
if (bootverbose) {
printf("AcpiOsDerivePciId: %s -> bus %d dev %d func %d\n",
acpi_name(Region), (*PciId)->Bus, (*PciId)->Device,
(*PciId)->Function);
}
}
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