/*      $NetBSD: OsdHardware.c,v 1.15 2024/06/23 15:21:52 andvar 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 1.15 2024/06/23 15:21:52 andvar Exp $");

#include "pci.h"

#include <sys/param.h>
#include <sys/device.h>

#include <dev/acpi/acpica.h>
#include <dev/acpi/acpivar.h>
#include <dev/acpi/acpi_pci.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 machine-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, UINT64 *Value, UINT32 Width)
{
        void *LogicalAddress;
        ACPI_STATUS rv = AE_OK;

        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;

        case 64:
                *Value = *(volatile uint64_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, UINT64 Value, UINT32 Width)
{
        void *LogicalAddress;
        ACPI_STATUS rv = AE_OK;

        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;

        case 64:
                *(volatile uint64_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, UINT64 *Value,
    UINT32 Width)
{
#if NPCI > 0
        pci_chipset_tag_t pc;
        pcitag_t tag;
        pcireg_t tmp;

        if (PciId->Bus >= 256 || PciId->Device >= 32 || PciId->Function >= 8)
                return AE_BAD_PARAMETER;

        pc = acpi_pcidev_get_tag(PciId->Segment, PciId->Bus, PciId->Device, PciId->Function);

        tag = pci_make_tag(pc, PciId->Bus, PciId->Device, PciId->Function);
        tmp = pci_conf_read(pc, tag, Register & ~3);

        switch (Width) {
        case 8:
                *Value = (tmp >> ((Register & 3) * 8)) & 0xff;
                break;

        case 16:
                *Value = (tmp >> ((Register & 3) * 8)) & 0xffff;
                break;

        case 32:
                *Value = tmp;
                break;

        default:
                return AE_BAD_PARAMETER;
        }

        return AE_OK;
#else
        return AE_BAD_PARAMETER;
#endif
}

/*
 * AcpiOsWritePciConfiguration:
 *
 *      Write a value to a PCI configuration register.
 */
ACPI_STATUS
AcpiOsWritePciConfiguration(ACPI_PCI_ID *PciId, UINT32 Register,
    ACPI_INTEGER Value, UINT32 Width)
{
#if NPCI > 0
        pci_chipset_tag_t pc;
        pcitag_t tag;
        pcireg_t tmp;

        pc = acpi_pcidev_get_tag(PciId->Segment, PciId->Bus, PciId->Device, PciId->Function);
        tag = pci_make_tag(pc, PciId->Bus, PciId->Device, PciId->Function);

        switch (Width) {
        case 8:
                tmp = pci_conf_read(pc, tag, Register & ~3);
                tmp &= ~(0xffu << ((Register & 3) * 8));
                tmp |= (Value << ((Register & 3) * 8));
                break;

        case 16:
                tmp = pci_conf_read(pc, tag, Register & ~3);
                tmp &= ~(0xffffu << ((Register & 3) * 8));
                tmp |= (Value << ((Register & 3) * 8));
                break;

        case 32:
                tmp = Value;
                break;

        default:
                return AE_BAD_PARAMETER;
        }

        pci_conf_write(pc, tag, Register & ~3, tmp);

        return AE_OK;
#else
        return AE_BAD_PARAMETER;
#endif
}