NetBSD-5.0.2/sys/dev/acpi/acpica/OsdHardware.c
/* $NetBSD: OsdHardware.c,v 1.4 2007/12/12 23:33:22 jmcneill Exp $ */
/*
* Copyright 2001 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* 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 for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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.
*/
/*
* OS Services Layer
*
* 6.7: Address Space Access: Port Input/Output
* 6.8: Address Space Access: Memory and Memory Mapped I/O
* 6.9: Address Space Access: PCI Configuration Space
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: OsdHardware.c,v 1.4 2007/12/12 23:33:22 jmcneill Exp $");
#include <sys/param.h>
#include <sys/device.h>
#include <dev/acpi/acpica.h>
#include <dev/acpi/acpivar.h>
#include <machine/acpi_machdep.h>
/*
* ACPICA doesn't provide much in the way of letting us know which
* hardware resources it wants to use. We therefore have to resort
* to calling machinde-dependent code to do the access for us.
*/
/*
* AcpiOsReadPort:
*
* Read a value from an input port.
*/
ACPI_STATUS
AcpiOsReadPort(ACPI_IO_ADDRESS Address, UINT32 *Value, UINT32 Width)
{
switch (Width) {
case 8:
*Value = acpi_md_OsIn8(Address);
break;
case 16:
*Value = acpi_md_OsIn16(Address);
break;
case 32:
*Value = acpi_md_OsIn32(Address);
break;
default:
return AE_BAD_PARAMETER;
}
return AE_OK;
}
/*
* AcpiOsWritePort:
*
* Write a value to an output port.
*/
ACPI_STATUS
AcpiOsWritePort(ACPI_IO_ADDRESS Address, UINT32 Value, UINT32 Width)
{
switch (Width) {
case 8:
acpi_md_OsOut8(Address, Value);
break;
case 16:
acpi_md_OsOut16(Address, Value);
break;
case 32:
acpi_md_OsOut32(Address, Value);
break;
default:
return AE_BAD_PARAMETER;
}
return AE_OK;
}
/*
* AcpiOsReadMemory:
*
* Read a value from a memory location.
*/
ACPI_STATUS
AcpiOsReadMemory(ACPI_PHYSICAL_ADDRESS Address, UINT32 *Value, UINT32 Width)
{
void *LogicalAddress;
ACPI_STATUS rv;
LogicalAddress = AcpiOsMapMemory(Address, Width / 8);
if (LogicalAddress == NULL)
return AE_NOT_EXIST;
switch (Width) {
case 8:
*Value = *(volatile uint8_t *) LogicalAddress;
break;
case 16:
*Value = *(volatile uint16_t *) LogicalAddress;
break;
case 32:
*Value = *(volatile uint32_t *) LogicalAddress;
break;
default:
rv = AE_BAD_PARAMETER;
}
AcpiOsUnmapMemory(LogicalAddress, Width / 8);
return rv;
}
/*
* AcpiOsWriteMemory:
*
* Write a value to a memory location.
*/
ACPI_STATUS
AcpiOsWriteMemory(ACPI_PHYSICAL_ADDRESS Address, UINT32 Value, UINT32 Width)
{
void *LogicalAddress;
ACPI_STATUS rv;
LogicalAddress = AcpiOsMapMemory(Address, Width / 8);
if (LogicalAddress == NULL)
return AE_NOT_FOUND;
switch (Width) {
case 8:
*(volatile uint8_t *) LogicalAddress = Value;
break;
case 16:
*(volatile uint16_t *) LogicalAddress = Value;
break;
case 32:
*(volatile uint32_t *) LogicalAddress = Value;
break;
default:
rv = AE_BAD_PARAMETER;
}
AcpiOsUnmapMemory(LogicalAddress, Width / 8);
return rv;
}
/*
* AcpiOsReadPciConfiguration:
*
* Read a value from a PCI configuration register.
*/
ACPI_STATUS
AcpiOsReadPciConfiguration(ACPI_PCI_ID *PciId, UINT32 Register, void *Value,
UINT32 Width)
{
pcitag_t tag;
pcireg_t tmp;
/* XXX Need to deal with "segment" ("hose" in Alpha terminology). */
if (PciId->Bus >= 256 || PciId->Device >= 32 || PciId->Function >= 8)
return AE_BAD_PARAMETER;
tag = pci_make_tag(acpi_softc->sc_pc, PciId->Bus, PciId->Device,
PciId->Function);
tmp = pci_conf_read(acpi_softc->sc_pc, tag, Register & ~3);
switch (Width) {
case 8:
*(uint8_t *) Value = (tmp >> ((Register & 3) * 8)) & 0xff;
break;
case 16:
*(uint16_t *) Value = (tmp >> ((Register & 3) * 8)) & 0xffff;
break;
case 32:
*(uint32_t *) Value = tmp;
break;
default:
return AE_BAD_PARAMETER;
}
return AE_OK;
}
/*
* AcpiOsWritePciConfiguration:
*
* Write a value to a PCI configuration register.
*/
ACPI_STATUS
AcpiOsWritePciConfiguration(ACPI_PCI_ID *PciId, UINT32 Register,
ACPI_INTEGER Value, UINT32 Width)
{
pcitag_t tag;
pcireg_t tmp;
/* XXX Need to deal with "segment" ("hose" in Alpha terminology). */
tag = pci_make_tag(acpi_softc->sc_pc, PciId->Bus, PciId->Device,
PciId->Function);
switch (Width) {
case 8:
tmp = pci_conf_read(acpi_softc->sc_pc, tag, Register & ~3);
tmp &= ~(0xff << ((Register & 3) * 8));
tmp |= (Value << ((Register & 3) * 8));
break;
case 16:
tmp = pci_conf_read(acpi_softc->sc_pc, tag, Register & ~3);
tmp &= ~(0xffff << ((Register & 3) * 8));
tmp |= (Value << ((Register & 3) * 8));
break;
case 32:
tmp = Value;
break;
default:
return AE_BAD_PARAMETER;
}
pci_conf_write(acpi_softc->sc_pc, tag, Register & ~3, tmp);
return AE_OK;
}
/* get PCI bus# from root bridge recursively */
static int
get_bus_number(
ACPI_HANDLE rhandle,
ACPI_HANDLE chandle,
ACPI_PCI_ID **PciId)
{
ACPI_HANDLE handle;
ACPI_STATUS rv;
ACPI_OBJECT_TYPE type;
ACPI_PCI_ID *id;
ACPI_INTEGER v;
int bus;
id = *PciId;
rv = AcpiGetParent(chandle, &handle);
if (ACPI_FAILURE(rv))
return 0;
/*
* When handle == rhandle, we have valid PciId->Bus
* which was obtained from _BBN in evrgnini.c
* so we don't have to reevaluate _BBN.
*/
if (handle != rhandle) {
bus = get_bus_number(rhandle, handle, PciId);
rv = AcpiGetType(handle, &type);
if (ACPI_FAILURE(rv) || type != ACPI_TYPE_DEVICE)
return bus;
rv = acpi_eval_integer(handle, METHOD_NAME__ADR, &v);
if (ACPI_FAILURE(rv))
return bus;
id->Bus = bus;
id->Device = ACPI_HIWORD((ACPI_INTEGER)v);
id->Function = ACPI_LOWORD((ACPI_INTEGER)v);
/* read HDR_TYPE register */
rv = AcpiOsReadPciConfiguration(id, 0x0e, &v, 8);
if (ACPI_SUCCESS(rv) &&
/* mask multifunction bit & check bridge type */
((v & 0x7f) == 1 || (v & 0x7f) == 2)) {
/* read SECONDARY_BUS register */
rv = AcpiOsReadPciConfiguration(id, 0x19, &v, 8);
if (ACPI_SUCCESS(rv))
id->Bus = v;
}
}
return id->Bus;
}
/*
* AcpiOsDerivePciId:
*
* Derive correct PCI bus# by traversing bridges
*/
void
AcpiOsDerivePciId(
ACPI_HANDLE rhandle,
ACPI_HANDLE chandle,
ACPI_PCI_ID **PciId)
{
(*PciId)->Bus = get_bus_number(rhandle, chandle, PciId);
}