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kernel/linux-imx6_3.14.28/drivers/acpi/acpica/rsirq.c 9.24 KB
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  /*******************************************************************************
   *
   * Module Name: rsirq - IRQ resource descriptors
   *
   ******************************************************************************/
  
  /*
   * Copyright (C) 2000 - 2013, Intel Corp.
   * 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,
   *    without modification.
   * 2. Redistributions in binary form must reproduce at minimum a disclaimer
   *    substantially similar to the "NO WARRANTY" disclaimer below
   *    ("Disclaimer") and any redistribution must be conditioned upon
   *    including a substantially similar Disclaimer requirement for further
   *    binary redistribution.
   * 3. Neither the names of the above-listed copyright holders nor the names
   *    of any contributors may be used to endorse or promote products derived
   *    from this software without specific prior written permission.
   *
   * Alternatively, this software may be distributed under the terms of the
   * GNU General Public License ("GPL") version 2 as published by the Free
   * Software Foundation.
   *
   * NO WARRANTY
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
   */
  
  #include <acpi/acpi.h>
  #include "accommon.h"
  #include "acresrc.h"
  
  #define _COMPONENT          ACPI_RESOURCES
  ACPI_MODULE_NAME("rsirq")
  
  /*******************************************************************************
   *
   * acpi_rs_get_irq
   *
   ******************************************************************************/
  struct acpi_rsconvert_info acpi_rs_get_irq[9] = {
  	{ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_IRQ,
  	 ACPI_RS_SIZE(struct acpi_resource_irq),
  	 ACPI_RSC_TABLE_SIZE(acpi_rs_get_irq)},
  
  	/* Get the IRQ mask (bytes 1:2) */
  
  	{ACPI_RSC_BITMASK16, ACPI_RS_OFFSET(data.irq.interrupts[0]),
  	 AML_OFFSET(irq.irq_mask),
  	 ACPI_RS_OFFSET(data.irq.interrupt_count)},
  
  	/* Set default flags (others are zero) */
  
  	{ACPI_RSC_SET8, ACPI_RS_OFFSET(data.irq.triggering),
  	 ACPI_EDGE_SENSITIVE,
  	 1},
  
  	/* Get the descriptor length (2 or 3 for IRQ descriptor) */
  
  	{ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET(data.irq.descriptor_length),
  	 AML_OFFSET(irq.descriptor_type),
  	 0},
  
  	/* All done if no flag byte present in descriptor */
  
  	{ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_AML_LENGTH, 0, 3},
  
  	/* Get flags: Triggering[0], Polarity[3], Sharing[4], Wake[5] */
  
  	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.triggering),
  	 AML_OFFSET(irq.flags),
  	 0},
  
  	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.polarity),
  	 AML_OFFSET(irq.flags),
  	 3},
  
  	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.sharable),
  	 AML_OFFSET(irq.flags),
  	 4},
  
  	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.wake_capable),
  	 AML_OFFSET(irq.flags),
  	 5}
  };
  
  /*******************************************************************************
   *
   * acpi_rs_set_irq
   *
   ******************************************************************************/
  
  struct acpi_rsconvert_info acpi_rs_set_irq[14] = {
  	/* Start with a default descriptor of length 3 */
  
  	{ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_IRQ,
  	 sizeof(struct aml_resource_irq),
  	 ACPI_RSC_TABLE_SIZE(acpi_rs_set_irq)},
  
  	/* Convert interrupt list to 16-bit IRQ bitmask */
  
  	{ACPI_RSC_BITMASK16, ACPI_RS_OFFSET(data.irq.interrupts[0]),
  	 AML_OFFSET(irq.irq_mask),
  	 ACPI_RS_OFFSET(data.irq.interrupt_count)},
  
  	/* Set flags: Triggering[0], Polarity[3], Sharing[4], Wake[5] */
  
  	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.triggering),
  	 AML_OFFSET(irq.flags),
  	 0},
  
  	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.polarity),
  	 AML_OFFSET(irq.flags),
  	 3},
  
  	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.sharable),
  	 AML_OFFSET(irq.flags),
  	 4},
  
  	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.wake_capable),
  	 AML_OFFSET(irq.flags),
  	 5},
  
  	/*
  	 * All done if the output descriptor length is required to be 3
  	 * (i.e., optimization to 2 bytes cannot be attempted)
  	 */
  	{ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
  	 ACPI_RS_OFFSET(data.irq.descriptor_length),
  	 3},
  
  	/* Set length to 2 bytes (no flags byte) */
  
  	{ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq_noflags)},
  
  	/*
  	 * All done if the output descriptor length is required to be 2.
  	 *
  	 * TBD: Perhaps we should check for error if input flags are not
  	 * compatible with a 2-byte descriptor.
  	 */
  	{ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
  	 ACPI_RS_OFFSET(data.irq.descriptor_length),
  	 2},
  
  	/* Reset length to 3 bytes (descriptor with flags byte) */
  
  	{ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq)},
  
  	/*
  	 * Check if the flags byte is necessary. Not needed if the flags are:
  	 * ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_HIGH, ACPI_EXCLUSIVE
  	 */
  	{ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
  	 ACPI_RS_OFFSET(data.irq.triggering),
  	 ACPI_EDGE_SENSITIVE},
  
  	{ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
  	 ACPI_RS_OFFSET(data.irq.polarity),
  	 ACPI_ACTIVE_HIGH},
  
  	{ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
  	 ACPI_RS_OFFSET(data.irq.sharable),
  	 ACPI_EXCLUSIVE},
  
  	/* We can optimize to a 2-byte irq_no_flags() descriptor */
  
  	{ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq_noflags)}
  };
  
  /*******************************************************************************
   *
   * acpi_rs_convert_ext_irq
   *
   ******************************************************************************/
  
  struct acpi_rsconvert_info acpi_rs_convert_ext_irq[10] = {
  	{ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_EXTENDED_IRQ,
  	 ACPI_RS_SIZE(struct acpi_resource_extended_irq),
  	 ACPI_RSC_TABLE_SIZE(acpi_rs_convert_ext_irq)},
  
  	{ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_EXTENDED_IRQ,
  	 sizeof(struct aml_resource_extended_irq),
  	 0},
  
  	/*
  	 * Flags: Producer/Consumer[0], Triggering[1], Polarity[2],
  	 *        Sharing[3], Wake[4]
  	 */
  	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.producer_consumer),
  	 AML_OFFSET(extended_irq.flags),
  	 0},
  
  	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.triggering),
  	 AML_OFFSET(extended_irq.flags),
  	 1},
  
  	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.polarity),
  	 AML_OFFSET(extended_irq.flags),
  	 2},
  
  	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.sharable),
  	 AML_OFFSET(extended_irq.flags),
  	 3},
  
  	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.wake_capable),
  	 AML_OFFSET(extended_irq.flags),
  	 4},
  
  	/* IRQ Table length (Byte4) */
  
  	{ACPI_RSC_COUNT, ACPI_RS_OFFSET(data.extended_irq.interrupt_count),
  	 AML_OFFSET(extended_irq.interrupt_count),
  	 sizeof(u32)},
  
  	/* Copy every IRQ in the table, each is 32 bits */
  
  	{ACPI_RSC_MOVE32, ACPI_RS_OFFSET(data.extended_irq.interrupts[0]),
  	 AML_OFFSET(extended_irq.interrupts[0]),
  	 0},
  
  	/* Optional resource_source (Index and String) */
  
  	{ACPI_RSC_SOURCEX, ACPI_RS_OFFSET(data.extended_irq.resource_source),
  	 ACPI_RS_OFFSET(data.extended_irq.interrupts[0]),
  	 sizeof(struct aml_resource_extended_irq)}
  };
  
  /*******************************************************************************
   *
   * acpi_rs_convert_dma
   *
   ******************************************************************************/
  
  struct acpi_rsconvert_info acpi_rs_convert_dma[6] = {
  	{ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_DMA,
  	 ACPI_RS_SIZE(struct acpi_resource_dma),
  	 ACPI_RSC_TABLE_SIZE(acpi_rs_convert_dma)},
  
  	{ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_DMA,
  	 sizeof(struct aml_resource_dma),
  	 0},
  
  	/* Flags: transfer preference, bus mastering, channel speed */
  
  	{ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET(data.dma.transfer),
  	 AML_OFFSET(dma.flags),
  	 0},
  
  	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.dma.bus_master),
  	 AML_OFFSET(dma.flags),
  	 2},
  
  	{ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET(data.dma.type),
  	 AML_OFFSET(dma.flags),
  	 5},
  
  	/* DMA channel mask bits */
  
  	{ACPI_RSC_BITMASK, ACPI_RS_OFFSET(data.dma.channels[0]),
  	 AML_OFFSET(dma.dma_channel_mask),
  	 ACPI_RS_OFFSET(data.dma.channel_count)}
  };
  
  /*******************************************************************************
   *
   * acpi_rs_convert_fixed_dma
   *
   ******************************************************************************/
  
  struct acpi_rsconvert_info acpi_rs_convert_fixed_dma[4] = {
  	{ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_FIXED_DMA,
  	 ACPI_RS_SIZE(struct acpi_resource_fixed_dma),
  	 ACPI_RSC_TABLE_SIZE(acpi_rs_convert_fixed_dma)},
  
  	{ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_FIXED_DMA,
  	 sizeof(struct aml_resource_fixed_dma),
  	 0},
  
  	/*
  	 * These fields are contiguous in both the source and destination:
  	 * request_lines
  	 * Channels
  	 */
  	{ACPI_RSC_MOVE16, ACPI_RS_OFFSET(data.fixed_dma.request_lines),
  	 AML_OFFSET(fixed_dma.request_lines),
  	 2},
  
  	{ACPI_RSC_MOVE8, ACPI_RS_OFFSET(data.fixed_dma.width),
  	 AML_OFFSET(fixed_dma.width),
  	 1},
  };