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@@ -0,0 +1,555 @@
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+
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+/******************************************************************************
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+ *
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+ * Module Name: hwxface - Public ACPICA hardware interfaces
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+ *
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+ *****************************************************************************/
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+
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+/*
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+ * Copyright (C) 2000 - 2008, Intel Corp.
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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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+ * without modification.
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+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
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+ * substantially similar to the "NO WARRANTY" disclaimer below
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+ * ("Disclaimer") and any redistribution must be conditioned upon
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+ * including a substantially similar Disclaimer requirement for further
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+ * binary redistribution.
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+ * 3. Neither the names of the above-listed copyright holders nor the names
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+ * of any contributors may be used to endorse or promote products derived
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+ * from this software without specific prior written permission.
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+ *
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+ * Alternatively, this software may be distributed under the terms of the
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+ * GNU General Public License ("GPL") version 2 as published by the Free
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+ * Software Foundation.
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+ *
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+ * NO WARRANTY
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+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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,
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+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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+ * POSSIBILITY OF SUCH DAMAGES.
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+ */
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+
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+#include <acpi/acpi.h>
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+#include <acpi/acnamesp.h>
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+
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+#define _COMPONENT ACPI_HARDWARE
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+ACPI_MODULE_NAME("hwxface")
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+
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+/******************************************************************************
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+ *
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+ * FUNCTION: acpi_read
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+ *
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+ * PARAMETERS: Value - Where the value is returned
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+ * Reg - GAS register structure
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+ *
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+ * RETURN: Status
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+ *
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+ * DESCRIPTION: Read from either memory or IO space.
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+ *
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+ ******************************************************************************/
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+acpi_status acpi_read(u32 *value, struct acpi_generic_address *reg)
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+{
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+ u32 width;
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+ u64 address;
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+ acpi_status status;
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+
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+ ACPI_FUNCTION_NAME(acpi_read);
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+
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+ /*
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+ * Must have a valid pointer to a GAS structure, and
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+ * a non-zero address within. However, don't return an error
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+ * because the PM1A/B code must not fail if B isn't present.
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+ */
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+ if (!reg) {
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+ return (AE_OK);
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+ }
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+
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+ /* Get a local copy of the address. Handles possible alignment issues */
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+
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+ ACPI_MOVE_64_TO_64(&address, ®->address);
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+ if (!address) {
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+ return (AE_OK);
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+ }
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+
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+ /* Supported widths are 8/16/32 */
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+
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+ width = reg->bit_width;
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+ if ((width != 8) && (width != 16) && (width != 32)) {
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+ return (AE_SUPPORT);
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+ }
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+
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+ /* Initialize entire 32-bit return value to zero */
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+
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+ *value = 0;
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+
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+ /*
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+ * Two address spaces supported: Memory or IO.
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+ * PCI_Config is not supported here because the GAS struct is insufficient
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+ */
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+ switch (reg->space_id) {
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+ case ACPI_ADR_SPACE_SYSTEM_MEMORY:
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+
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+ status = acpi_os_read_memory((acpi_physical_address) address,
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+ value, width);
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+ break;
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+
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+ case ACPI_ADR_SPACE_SYSTEM_IO:
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+
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+ status =
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+ acpi_os_read_port((acpi_io_address) address, value, width);
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+ break;
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+
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+ default:
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+ ACPI_ERROR((AE_INFO,
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+ "Unsupported address space: %X", reg->space_id));
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+ return (AE_BAD_PARAMETER);
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+ }
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+
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+ ACPI_DEBUG_PRINT((ACPI_DB_IO,
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+ "Read: %8.8X width %2d from %8.8X%8.8X (%s)\n",
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+ *value, width, ACPI_FORMAT_UINT64(address),
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+ acpi_ut_get_region_name(reg->space_id)));
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+
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+ return (status);
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+}
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+
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+ACPI_EXPORT_SYMBOL(acpi_read)
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+
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+/******************************************************************************
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+ *
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+ * FUNCTION: acpi_write
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+ *
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+ * PARAMETERS: Value - To be written
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+ * Reg - GAS register structure
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+ *
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+ * RETURN: Status
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+ *
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+ * DESCRIPTION: Write to either memory or IO space.
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+ *
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+ ******************************************************************************/
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+acpi_status acpi_write(u32 value, struct acpi_generic_address *reg)
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+{
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+ u32 width;
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+ u64 address;
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+ acpi_status status;
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+
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+ ACPI_FUNCTION_NAME(acpi_write);
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+
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+ /*
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+ * Must have a valid pointer to a GAS structure, and
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+ * a non-zero address within. However, don't return an error
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+ * because the PM1A/B code must not fail if B isn't present.
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+ */
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+ if (!reg) {
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+ return (AE_OK);
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+ }
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+
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+ /* Get a local copy of the address. Handles possible alignment issues */
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+
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+ ACPI_MOVE_64_TO_64(&address, ®->address);
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+ if (!address) {
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+ return (AE_OK);
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+ }
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+
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+ /* Supported widths are 8/16/32 */
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+
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+ width = reg->bit_width;
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+ if ((width != 8) && (width != 16) && (width != 32)) {
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+ return (AE_SUPPORT);
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+ }
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+
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+ /*
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+ * Two address spaces supported: Memory or IO.
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+ * PCI_Config is not supported here because the GAS struct is insufficient
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+ */
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+ switch (reg->space_id) {
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+ case ACPI_ADR_SPACE_SYSTEM_MEMORY:
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+
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+ status = acpi_os_write_memory((acpi_physical_address) address,
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+ value, width);
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+ break;
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+
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+ case ACPI_ADR_SPACE_SYSTEM_IO:
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+
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+ status = acpi_os_write_port((acpi_io_address) address, value,
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+ width);
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+ break;
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+
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+ default:
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+ ACPI_ERROR((AE_INFO,
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+ "Unsupported address space: %X", reg->space_id));
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+ return (AE_BAD_PARAMETER);
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+ }
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+
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+ ACPI_DEBUG_PRINT((ACPI_DB_IO,
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+ "Wrote: %8.8X width %2d to %8.8X%8.8X (%s)\n",
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+ value, width, ACPI_FORMAT_UINT64(address),
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+ acpi_ut_get_region_name(reg->space_id)));
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+
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+ return (status);
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+}
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+
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+ACPI_EXPORT_SYMBOL(acpi_write)
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+
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+/*******************************************************************************
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+ *
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+ * FUNCTION: acpi_get_register_unlocked
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+ *
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+ * PARAMETERS: register_id - ID of ACPI bit_register to access
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+ * return_value - Value that was read from the register
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+ *
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+ * RETURN: Status and the value read from specified Register. Value
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+ * returned is normalized to bit0 (is shifted all the way right)
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+ *
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+ * DESCRIPTION: ACPI bit_register read function. Does not acquire the HW lock.
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+ *
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+ ******************************************************************************/
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+acpi_status acpi_get_register_unlocked(u32 register_id, u32 *return_value)
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+{
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+ u32 register_value = 0;
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+ struct acpi_bit_register_info *bit_reg_info;
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+ acpi_status status;
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+
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+ ACPI_FUNCTION_TRACE(acpi_get_register_unlocked);
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+
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+ /* Get the info structure corresponding to the requested ACPI Register */
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+
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+ bit_reg_info = acpi_hw_get_bit_register_info(register_id);
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+ if (!bit_reg_info) {
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+ return_ACPI_STATUS(AE_BAD_PARAMETER);
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+ }
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+
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+ /* Read from the register */
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+
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+ status = acpi_hw_register_read(bit_reg_info->parent_register,
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+ ®ister_value);
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+
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+ if (ACPI_SUCCESS(status)) {
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+
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+ /* Normalize the value that was read */
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+
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+ register_value =
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+ ((register_value & bit_reg_info->access_bit_mask)
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+ >> bit_reg_info->bit_position);
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+
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+ *return_value = register_value;
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+
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+ ACPI_DEBUG_PRINT((ACPI_DB_IO, "Read value %8.8X register %X\n",
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+ register_value,
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+ bit_reg_info->parent_register));
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+ }
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+
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+ return_ACPI_STATUS(status);
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+}
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+
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+ACPI_EXPORT_SYMBOL(acpi_get_register_unlocked)
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+
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+/*******************************************************************************
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+ *
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+ * FUNCTION: acpi_get_register
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+ *
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+ * PARAMETERS: register_id - ID of ACPI bit_register to access
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+ * return_value - Value that was read from the register
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+ *
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+ * RETURN: Status and the value read from specified Register. Value
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+ * returned is normalized to bit0 (is shifted all the way right)
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+ *
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+ * DESCRIPTION: ACPI bit_register read function.
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+ *
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+ ******************************************************************************/
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+acpi_status acpi_get_register(u32 register_id, u32 *return_value)
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+{
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+ acpi_status status;
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+ acpi_cpu_flags flags;
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+
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+ flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock);
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+ status = acpi_get_register_unlocked(register_id, return_value);
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+ acpi_os_release_lock(acpi_gbl_hardware_lock, flags);
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+
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+ return (status);
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+}
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+
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+ACPI_EXPORT_SYMBOL(acpi_get_register)
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+
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+/*******************************************************************************
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+ *
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+ * FUNCTION: acpi_set_register
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+ *
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+ * PARAMETERS: register_id - ID of ACPI bit_register to access
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+ * Value - (only used on write) value to write to the
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+ * Register, NOT pre-normalized to the bit pos
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+ *
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+ * RETURN: Status
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+ *
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+ * DESCRIPTION: ACPI Bit Register write function.
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+ *
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+ ******************************************************************************/
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+acpi_status acpi_set_register(u32 register_id, u32 value)
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+{
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+ u32 register_value = 0;
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+ struct acpi_bit_register_info *bit_reg_info;
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+ acpi_status status;
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+ acpi_cpu_flags lock_flags;
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+
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+ ACPI_FUNCTION_TRACE_U32(acpi_set_register, register_id);
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+
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+ /* Get the info structure corresponding to the requested ACPI Register */
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+
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+ bit_reg_info = acpi_hw_get_bit_register_info(register_id);
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+ if (!bit_reg_info) {
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+ ACPI_ERROR((AE_INFO, "Bad ACPI HW RegisterId: %X",
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+ register_id));
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+ return_ACPI_STATUS(AE_BAD_PARAMETER);
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+ }
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+
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+ lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock);
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+
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+ /* Always do a register read first so we can insert the new bits */
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+
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+ status = acpi_hw_register_read(bit_reg_info->parent_register,
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+ ®ister_value);
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+ if (ACPI_FAILURE(status)) {
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+ goto unlock_and_exit;
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+ }
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+
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+ /*
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+ * Decode the Register ID
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+ * Register ID = [Register block ID] | [bit ID]
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+ *
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+ * Check bit ID to fine locate Register offset.
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+ * Check Mask to determine Register offset, and then read-write.
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+ */
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+ switch (bit_reg_info->parent_register) {
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+ case ACPI_REGISTER_PM1_STATUS:
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+
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+ /*
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+ * Status Registers are different from the rest. Clear by
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+ * writing 1, and writing 0 has no effect. So, the only relevant
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+ * information is the single bit we're interested in, all others should
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+ * be written as 0 so they will be left unchanged.
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+ */
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+ value = ACPI_REGISTER_PREPARE_BITS(value,
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+ bit_reg_info->bit_position,
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+ bit_reg_info->
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+ access_bit_mask);
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+ if (value) {
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+ status =
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+ acpi_hw_register_write(ACPI_REGISTER_PM1_STATUS,
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+ (u16) value);
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+ register_value = 0;
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+ }
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+ break;
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+
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+ case ACPI_REGISTER_PM1_ENABLE:
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+
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+ ACPI_REGISTER_INSERT_VALUE(register_value,
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+ bit_reg_info->bit_position,
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+ bit_reg_info->access_bit_mask,
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+ value);
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+
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+ status = acpi_hw_register_write(ACPI_REGISTER_PM1_ENABLE,
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+ (u16) register_value);
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+ break;
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+
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+ case ACPI_REGISTER_PM1_CONTROL:
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+
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+ /*
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+ * Write the PM1 Control register.
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+ * Note that at this level, the fact that there are actually TWO
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+ * registers (A and B - and B may not exist) is abstracted.
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+ */
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+ ACPI_DEBUG_PRINT((ACPI_DB_IO, "PM1 control: Read %X\n",
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+ register_value));
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+
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+ ACPI_REGISTER_INSERT_VALUE(register_value,
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+ bit_reg_info->bit_position,
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+ bit_reg_info->access_bit_mask,
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+ value);
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+
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+ status = acpi_hw_register_write(ACPI_REGISTER_PM1_CONTROL,
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+ (u16) register_value);
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+ break;
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+
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+ case ACPI_REGISTER_PM2_CONTROL:
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+
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+ status = acpi_hw_register_read(ACPI_REGISTER_PM2_CONTROL,
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+ ®ister_value);
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+ if (ACPI_FAILURE(status)) {
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+ goto unlock_and_exit;
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+ }
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+
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+ ACPI_DEBUG_PRINT((ACPI_DB_IO,
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+ "PM2 control: Read %X from %8.8X%8.8X\n",
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+ register_value,
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+ ACPI_FORMAT_UINT64(acpi_gbl_FADT.
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+ xpm2_control_block.
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+ address)));
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+
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+ ACPI_REGISTER_INSERT_VALUE(register_value,
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+ bit_reg_info->bit_position,
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+ bit_reg_info->access_bit_mask,
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+ value);
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+
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+ ACPI_DEBUG_PRINT((ACPI_DB_IO,
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+ "About to write %4.4X to %8.8X%8.8X\n",
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+ register_value,
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+ ACPI_FORMAT_UINT64(acpi_gbl_FADT.
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+ xpm2_control_block.
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+ address)));
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+
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+ status = acpi_hw_register_write(ACPI_REGISTER_PM2_CONTROL,
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+ (u8) (register_value));
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+ break;
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+
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+ default:
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+ break;
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+ }
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+
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+ unlock_and_exit:
|
|
|
+
|
|
|
+ acpi_os_release_lock(acpi_gbl_hardware_lock, lock_flags);
|
|
|
+
|
|
|
+ /* Normalize the value that was read */
|
|
|
+
|
|
|
+ ACPI_DEBUG_EXEC(register_value =
|
|
|
+ ((register_value & bit_reg_info->access_bit_mask) >>
|
|
|
+ bit_reg_info->bit_position));
|
|
|
+
|
|
|
+ ACPI_DEBUG_PRINT((ACPI_DB_IO,
|
|
|
+ "Set bits: %8.8X actual %8.8X register %X\n", value,
|
|
|
+ register_value, bit_reg_info->parent_register));
|
|
|
+ return_ACPI_STATUS(status);
|
|
|
+}
|
|
|
+
|
|
|
+ACPI_EXPORT_SYMBOL(acpi_set_register)
|
|
|
+
|
|
|
+/*******************************************************************************
|
|
|
+ *
|
|
|
+ * FUNCTION: acpi_get_sleep_type_data
|
|
|
+ *
|
|
|
+ * PARAMETERS: sleep_state - Numeric sleep state
|
|
|
+ * *sleep_type_a - Where SLP_TYPa is returned
|
|
|
+ * *sleep_type_b - Where SLP_TYPb is returned
|
|
|
+ *
|
|
|
+ * RETURN: Status - ACPI status
|
|
|
+ *
|
|
|
+ * DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested sleep
|
|
|
+ * state.
|
|
|
+ *
|
|
|
+ ******************************************************************************/
|
|
|
+acpi_status
|
|
|
+acpi_get_sleep_type_data(u8 sleep_state, u8 *sleep_type_a, u8 *sleep_type_b)
|
|
|
+{
|
|
|
+ acpi_status status = AE_OK;
|
|
|
+ struct acpi_evaluate_info *info;
|
|
|
+
|
|
|
+ ACPI_FUNCTION_TRACE(acpi_get_sleep_type_data);
|
|
|
+
|
|
|
+ /* Validate parameters */
|
|
|
+
|
|
|
+ if ((sleep_state > ACPI_S_STATES_MAX) || !sleep_type_a || !sleep_type_b) {
|
|
|
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Allocate the evaluation information block */
|
|
|
+
|
|
|
+ info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
|
|
|
+ if (!info) {
|
|
|
+ return_ACPI_STATUS(AE_NO_MEMORY);
|
|
|
+ }
|
|
|
+
|
|
|
+ info->pathname =
|
|
|
+ ACPI_CAST_PTR(char, acpi_gbl_sleep_state_names[sleep_state]);
|
|
|
+
|
|
|
+ /* Evaluate the namespace object containing the values for this state */
|
|
|
+
|
|
|
+ status = acpi_ns_evaluate(info);
|
|
|
+ if (ACPI_FAILURE(status)) {
|
|
|
+ ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
|
|
|
+ "%s while evaluating SleepState [%s]\n",
|
|
|
+ acpi_format_exception(status),
|
|
|
+ info->pathname));
|
|
|
+
|
|
|
+ goto cleanup;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Must have a return object */
|
|
|
+
|
|
|
+ if (!info->return_object) {
|
|
|
+ ACPI_ERROR((AE_INFO, "No Sleep State object returned from [%s]",
|
|
|
+ info->pathname));
|
|
|
+ status = AE_NOT_EXIST;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* It must be of type Package */
|
|
|
+
|
|
|
+ else if (ACPI_GET_OBJECT_TYPE(info->return_object) != ACPI_TYPE_PACKAGE) {
|
|
|
+ ACPI_ERROR((AE_INFO,
|
|
|
+ "Sleep State return object is not a Package"));
|
|
|
+ status = AE_AML_OPERAND_TYPE;
|
|
|
+ }
|
|
|
+
|
|
|
+ /*
|
|
|
+ * The package must have at least two elements. NOTE (March 2005): This
|
|
|
+ * goes against the current ACPI spec which defines this object as a
|
|
|
+ * package with one encoded DWORD element. However, existing practice
|
|
|
+ * by BIOS vendors seems to be to have 2 or more elements, at least
|
|
|
+ * one per sleep type (A/B).
|
|
|
+ */
|
|
|
+ else if (info->return_object->package.count < 2) {
|
|
|
+ ACPI_ERROR((AE_INFO,
|
|
|
+ "Sleep State return package does not have at least two elements"));
|
|
|
+ status = AE_AML_NO_OPERAND;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* The first two elements must both be of type Integer */
|
|
|
+
|
|
|
+ else if ((ACPI_GET_OBJECT_TYPE(info->return_object->package.elements[0])
|
|
|
+ != ACPI_TYPE_INTEGER) ||
|
|
|
+ (ACPI_GET_OBJECT_TYPE(info->return_object->package.elements[1])
|
|
|
+ != ACPI_TYPE_INTEGER)) {
|
|
|
+ ACPI_ERROR((AE_INFO,
|
|
|
+ "Sleep State return package elements are not both Integers (%s, %s)",
|
|
|
+ acpi_ut_get_object_type_name(info->return_object->
|
|
|
+ package.elements[0]),
|
|
|
+ acpi_ut_get_object_type_name(info->return_object->
|
|
|
+ package.elements[1])));
|
|
|
+ status = AE_AML_OPERAND_TYPE;
|
|
|
+ } else {
|
|
|
+ /* Valid _Sx_ package size, type, and value */
|
|
|
+
|
|
|
+ *sleep_type_a = (u8)
|
|
|
+ (info->return_object->package.elements[0])->integer.value;
|
|
|
+ *sleep_type_b = (u8)
|
|
|
+ (info->return_object->package.elements[1])->integer.value;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (ACPI_FAILURE(status)) {
|
|
|
+ ACPI_EXCEPTION((AE_INFO, status,
|
|
|
+ "While evaluating SleepState [%s], bad Sleep object %p type %s",
|
|
|
+ info->pathname, info->return_object,
|
|
|
+ acpi_ut_get_object_type_name(info->
|
|
|
+ return_object)));
|
|
|
+ }
|
|
|
+
|
|
|
+ acpi_ut_remove_reference(info->return_object);
|
|
|
+
|
|
|
+ cleanup:
|
|
|
+ ACPI_FREE(info);
|
|
|
+ return_ACPI_STATUS(status);
|
|
|
+}
|
|
|
+
|
|
|
+ACPI_EXPORT_SYMBOL(acpi_get_sleep_type_data)
|
Bob Moore