256 lines
7.4 KiB
C
256 lines
7.4 KiB
C
/*-
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* Copyright (c) 2000, 2001 Michael Smith
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* Copyright (c) 2000 BSDi
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* 6.7 : Hardware Abstraction
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "acpi.h"
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#include <machine/bus.h>
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#include <machine/pci_cfgreg.h>
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#include <dev/pci/pcireg.h>
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/*
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* ACPICA's rather gung-ho approach to hardware resource ownership is a little
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* troublesome insofar as there is no easy way for us to know in advance
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* exactly which I/O resources it's going to want to use.
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*
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* In order to deal with this, we ignore resource ownership entirely, and simply
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* use the native I/O space accessor functionality. This is Evil, but it works.
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*
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* XXX use an intermediate #define for the tag/handle
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*/
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#ifdef __i386__
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#define ACPI_BUS_SPACE_IO I386_BUS_SPACE_IO
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#define ACPI_BUS_HANDLE 0
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#endif
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#ifdef __ia64__
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#define ACPI_BUS_SPACE_IO IA64_BUS_SPACE_IO
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#define ACPI_BUS_HANDLE 0
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#endif
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#ifdef __amd64__
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#define ACPI_BUS_SPACE_IO AMD64_BUS_SPACE_IO
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#define ACPI_BUS_HANDLE 0
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#endif
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ACPI_STATUS
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AcpiOsReadPort(ACPI_IO_ADDRESS InPort, UINT32 *Value, UINT32 Width)
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{
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switch (Width) {
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case 8:
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*(u_int8_t *)Value = bus_space_read_1(ACPI_BUS_SPACE_IO,
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ACPI_BUS_HANDLE, InPort);
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break;
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case 16:
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*(u_int16_t *)Value = bus_space_read_2(ACPI_BUS_SPACE_IO,
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ACPI_BUS_HANDLE, InPort);
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break;
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case 32:
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*(u_int32_t *)Value = bus_space_read_4(ACPI_BUS_SPACE_IO,
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ACPI_BUS_HANDLE, InPort);
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break;
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default:
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/* debug trap goes here */
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break;
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}
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return (AE_OK);
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}
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ACPI_STATUS
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AcpiOsWritePort(ACPI_IO_ADDRESS OutPort, UINT32 Value, UINT32 Width)
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{
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switch (Width) {
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case 8:
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bus_space_write_1(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
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break;
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case 16:
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bus_space_write_2(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
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break;
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case 32:
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bus_space_write_4(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
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break;
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default:
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/* debug trap goes here */
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break;
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}
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return (AE_OK);
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}
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ACPI_STATUS
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AcpiOsReadPciConfiguration(ACPI_PCI_ID *PciId, UINT32 Register, void *Value,
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UINT32 Width)
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{
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u_int32_t byte_width = Width / 8;
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u_int32_t val;
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if (!pci_cfgregopen())
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return (AE_NOT_EXIST);
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val = pci_cfgregread(PciId->Bus, PciId->Device, PciId->Function, Register,
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byte_width);
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switch (Width) {
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case 8:
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*(u_int8_t *)Value = val & 0xff;
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break;
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case 16:
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*(u_int16_t *)Value = val & 0xffff;
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break;
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case 32:
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*(u_int32_t *)Value = val;
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break;
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default:
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/* debug trap goes here */
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break;
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}
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return (AE_OK);
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}
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ACPI_STATUS
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AcpiOsWritePciConfiguration (ACPI_PCI_ID *PciId, UINT32 Register,
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ACPI_INTEGER Value, UINT32 Width)
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{
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u_int32_t byte_width = Width / 8;
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if (!pci_cfgregopen())
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return (AE_NOT_EXIST);
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pci_cfgregwrite(PciId->Bus, PciId->Device, PciId->Function, Register,
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Value, byte_width);
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return (AE_OK);
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}
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/* XXX should use acpivar.h but too many include dependencies */
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extern ACPI_STATUS acpi_GetInteger(ACPI_HANDLE handle, char *path, int
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*number);
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/*
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* Depth-first recursive case for finding the bus, given the slot/function.
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*/
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static int
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acpi_bus_number(ACPI_HANDLE root, ACPI_HANDLE curr, ACPI_PCI_ID *PciId)
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{
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ACPI_HANDLE parent;
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ACPI_STATUS status;
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ACPI_OBJECT_TYPE type;
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UINT32 adr;
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int bus, slot, func, class, subclass, header;
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/* Try to get the _BBN object of the root, otherwise assume it is 0. */
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bus = 0;
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if (root == curr) {
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status = acpi_GetInteger(root, "_BBN", &bus);
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if (ACPI_FAILURE(status) && bootverbose)
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printf("acpi_bus_number: root bus has no _BBN, assuming 0\n");
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return (bus);
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}
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status = AcpiGetParent(curr, &parent);
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if (ACPI_FAILURE(status))
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return (bus);
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/* First, recurse up the tree until we find the host bus. */
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bus = acpi_bus_number(root, parent, PciId);
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/* Validate parent bus device type. */
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if (ACPI_FAILURE(AcpiGetType(parent, &type)) || type != ACPI_TYPE_DEVICE) {
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printf("acpi_bus_number: not a device, type %d\n", type);
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return (bus);
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}
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/* Get the parent's slot and function. */
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status = acpi_GetInteger(parent, "_ADR", &adr);
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if (ACPI_FAILURE(status)) {
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printf("acpi_bus_number: can't get _ADR\n");
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return (bus);
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}
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slot = ACPI_HIWORD(adr);
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func = ACPI_LOWORD(adr);
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/* Is this a PCI-PCI or Cardbus-PCI bridge? */
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class = pci_cfgregread(bus, slot, func, PCIR_CLASS, 1);
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if (class != PCIC_BRIDGE)
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return (bus);
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subclass = pci_cfgregread(bus, slot, func, PCIR_SUBCLASS, 1);
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/* Find the header type, masking off the multifunction bit. */
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header = pci_cfgregread(bus, slot, func, PCIR_HDRTYPE, 1) & PCIM_HDRTYPE;
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if (header == PCIM_HDRTYPE_BRIDGE && subclass == PCIS_BRIDGE_PCI)
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bus = pci_cfgregread(bus, slot, func, PCIR_SECBUS_1, 1);
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if (header == PCIM_HDRTYPE_CARDBUS && subclass == PCIS_BRIDGE_CARDBUS)
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bus = pci_cfgregread(bus, slot, func, PCIR_SECBUS_2, 1);
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return (bus);
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}
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/*
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* Find the bus number for a device
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*
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* rhandle: handle for the root bus
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* chandle: handle for the device
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* PciId: pointer to device slot and function, we fill out bus
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*/
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void
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AcpiOsDerivePciId(ACPI_HANDLE rhandle, ACPI_HANDLE chandle, ACPI_PCI_ID **PciId)
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{
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ACPI_HANDLE parent;
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ACPI_STATUS status;
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int bus;
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if (pci_cfgregopen() == 0)
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panic("AcpiOsDerivePciId unable to initialize pci bus");
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/* Try to read _BBN for bus number if we're at the root */
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bus = 0;
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if (rhandle == chandle) {
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status = acpi_GetInteger(rhandle, "_BBN", &bus);
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if (ACPI_FAILURE(status) && bootverbose)
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printf("AcpiOsDerivePciId: root bus has no _BBN, assuming 0\n");
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}
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/*
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* Get the parent handle and call the recursive case. It is not
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* clear why we seem to be getting a chandle that points to a child
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* of the desired slot/function but passing in the parent handle
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* here works.
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*/
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if (ACPI_SUCCESS(AcpiGetParent(chandle, &parent)))
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bus = acpi_bus_number(rhandle, parent, *PciId);
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(*PciId)->Bus = bus;
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if (bootverbose) {
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printf("AcpiOsDerivePciId: bus %d dev %d func %d\n",
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(*PciId)->Bus, (*PciId)->Device, (*PciId)->Function);
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}
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}
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