LXR linux/drivers/acpi/acpica/rsirq.c

   1/*******************************************************************************
   2 *
   3 * Module Name: rsirq - IRQ resource descriptors
   4 *
   5 ******************************************************************************/
   6
   7/*
   8 * Copyright (C) 2000 - 2013, Intel Corp.
   9 * All rights reserved.
  10 *
  11 * Redistribution and use in source and binary forms, with or without
  12 * modification, are permitted provided that the following conditions
  13 * are met:
  14 * 1. Redistributions of source code must retain the above copyright
  15 *    notice, this list of conditions, and the following disclaimer,
  16 *    without modification.
  17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18 *    substantially similar to the "NO WARRANTY" disclaimer below
  19 *    ("Disclaimer") and any redistribution must be conditioned upon
  20 *    including a substantially similar Disclaimer requirement for further
  21 *    binary redistribution.
  22 * 3. Neither the names of the above-listed copyright holders nor the names
  23 *    of any contributors may be used to endorse or promote products derived
  24 *    from this software without specific prior written permission.
  25 *
  26 * Alternatively, this software may be distributed under the terms of the
  27 * GNU General Public License ("GPL") version 2 as published by the Free
  28 * Software Foundation.
  29 *
  30 * NO WARRANTY
  31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41 * POSSIBILITY OF SUCH DAMAGES.
  42 */
  43
  44#include <acpi/acpi.h>
  45#include "accommon.h"
  46#include "acresrc.h"
  47
  48#define _COMPONENT          ACPI_RESOURCES
  49ACPI_MODULE_NAME("rsirq")
  50
  51/*******************************************************************************
  52 *
  53 * acpi_rs_get_irq
  54 *
  55 ******************************************************************************/
  56struct acpi_rsconvert_info acpi_rs_get_irq[9] = {
  57        {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_IRQ,
  58         ACPI_RS_SIZE(struct acpi_resource_irq),
  59         ACPI_RSC_TABLE_SIZE(acpi_rs_get_irq)},
  60
  61        /* Get the IRQ mask (bytes 1:2) */
  62
  63        {ACPI_RSC_BITMASK16, ACPI_RS_OFFSET(data.irq.interrupts[0]),
  64         AML_OFFSET(irq.irq_mask),
  65         ACPI_RS_OFFSET(data.irq.interrupt_count)},
  66
  67        /* Set default flags (others are zero) */
  68
  69        {ACPI_RSC_SET8, ACPI_RS_OFFSET(data.irq.triggering),
  70         ACPI_EDGE_SENSITIVE,
  71         1},
  72
  73        /* Get the descriptor length (2 or 3 for IRQ descriptor) */
  74
  75        {ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET(data.irq.descriptor_length),
  76         AML_OFFSET(irq.descriptor_type),
  77         0},
  78
  79        /* All done if no flag byte present in descriptor */
  80
  81        {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_AML_LENGTH, 0, 3},
  82
  83        /* Get flags: Triggering[0], Polarity[3], Sharing[4], Wake[5] */
  84
  85        {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.triggering),
  86         AML_OFFSET(irq.flags),
  87         0},
  88
  89        {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.polarity),
  90         AML_OFFSET(irq.flags),
  91         3},
  92
  93        {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.sharable),
  94         AML_OFFSET(irq.flags),
  95         4},
  96
  97        {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.wake_capable),
  98         AML_OFFSET(irq.flags),
  99         5}
 100};
 101
 102/*******************************************************************************
 103 *
 104 * acpi_rs_set_irq
 105 *
 106 ******************************************************************************/
 107
 108struct acpi_rsconvert_info acpi_rs_set_irq[14] = {
 109        /* Start with a default descriptor of length 3 */
 110
 111        {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_IRQ,
 112         sizeof(struct aml_resource_irq),
 113         ACPI_RSC_TABLE_SIZE(acpi_rs_set_irq)},
 114
 115        /* Convert interrupt list to 16-bit IRQ bitmask */
 116
 117        {ACPI_RSC_BITMASK16, ACPI_RS_OFFSET(data.irq.interrupts[0]),
 118         AML_OFFSET(irq.irq_mask),
 119         ACPI_RS_OFFSET(data.irq.interrupt_count)},
 120
 121        /* Set flags: Triggering[0], Polarity[3], Sharing[4], Wake[5] */
 122
 123        {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.triggering),
 124         AML_OFFSET(irq.flags),
 125         0},
 126
 127        {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.polarity),
 128         AML_OFFSET(irq.flags),
 129         3},
 130
 131        {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.sharable),
 132         AML_OFFSET(irq.flags),
 133         4},
 134
 135        {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.wake_capable),
 136         AML_OFFSET(irq.flags),
 137         5},
 138
 139        /*
 140         * All done if the output descriptor length is required to be 3
 141         * (i.e., optimization to 2 bytes cannot be attempted)
 142         */
 143        {ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
 144         ACPI_RS_OFFSET(data.irq.descriptor_length),
 145         3},
 146
 147        /* Set length to 2 bytes (no flags byte) */
 148
 149        {ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq_noflags)},
 150
 151        /*
 152         * All done if the output descriptor length is required to be 2.
 153         *
 154         * TBD: Perhaps we should check for error if input flags are not
 155         * compatible with a 2-byte descriptor.
 156         */
 157        {ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
 158         ACPI_RS_OFFSET(data.irq.descriptor_length),
 159         2},
 160
 161        /* Reset length to 3 bytes (descriptor with flags byte) */
 162
 163        {ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq)},
 164
 165        /*
 166         * Check if the flags byte is necessary. Not needed if the flags are:
 167         * ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_HIGH, ACPI_EXCLUSIVE
 168         */
 169        {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
 170         ACPI_RS_OFFSET(data.irq.triggering),
 171         ACPI_EDGE_SENSITIVE},
 172
 173        {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
 174         ACPI_RS_OFFSET(data.irq.polarity),
 175         ACPI_ACTIVE_HIGH},
 176
 177        {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
 178         ACPI_RS_OFFSET(data.irq.sharable),
 179         ACPI_EXCLUSIVE},
 180
 181        /* We can optimize to a 2-byte irq_no_flags() descriptor */
 182
 183        {ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq_noflags)}
 184};
 185
 186/*******************************************************************************
 187 *
 188 * acpi_rs_convert_ext_irq
 189 *
 190 ******************************************************************************/
 191
 192struct acpi_rsconvert_info acpi_rs_convert_ext_irq[10] = {
 193        {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_EXTENDED_IRQ,
 194         ACPI_RS_SIZE(struct acpi_resource_extended_irq),
 195         ACPI_RSC_TABLE_SIZE(acpi_rs_convert_ext_irq)},
 196
 197        {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_EXTENDED_IRQ,
 198         sizeof(struct aml_resource_extended_irq),
 199         0},
 200
 201        /*
 202         * Flags: Producer/Consumer[0], Triggering[1], Polarity[2],
 203         *        Sharing[3], Wake[4]
 204         */
 205        {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.producer_consumer),
 206         AML_OFFSET(extended_irq.flags),
 207         0},
 208
 209        {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.triggering),
 210         AML_OFFSET(extended_irq.flags),
 211         1},
 212
 213        {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.polarity),
 214         AML_OFFSET(extended_irq.flags),
 215         2},
 216
 217        {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.sharable),
 218         AML_OFFSET(extended_irq.flags),
 219         3},
 220
 221        {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.wake_capable),
 222         AML_OFFSET(extended_irq.flags),
 223         4},
 224
 225        /* IRQ Table length (Byte4) */
 226
 227        {ACPI_RSC_COUNT, ACPI_RS_OFFSET(data.extended_irq.interrupt_count),
 228         AML_OFFSET(extended_irq.interrupt_count),
 229         sizeof(u32)},
 230
 231        /* Copy every IRQ in the table, each is 32 bits */
 232
 233        {ACPI_RSC_MOVE32, ACPI_RS_OFFSET(data.extended_irq.interrupts[0]),
 234         AML_OFFSET(extended_irq.interrupts[0]),
 235         0},
 236
 237        /* Optional resource_source (Index and String) */
 238
 239        {ACPI_RSC_SOURCEX, ACPI_RS_OFFSET(data.extended_irq.resource_source),
 240         ACPI_RS_OFFSET(data.extended_irq.interrupts[0]),
 241         sizeof(struct aml_resource_extended_irq)}
 242};
 243
 244/*******************************************************************************
 245 *
 246 * acpi_rs_convert_dma
 247 *
 248 ******************************************************************************/
 249
 250struct acpi_rsconvert_info acpi_rs_convert_dma[6] = {
 251        {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_DMA,
 252         ACPI_RS_SIZE(struct acpi_resource_dma),
 253         ACPI_RSC_TABLE_SIZE(acpi_rs_convert_dma)},
 254
 255        {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_DMA,
 256         sizeof(struct aml_resource_dma),
 257         0},
 258
 259        /* Flags: transfer preference, bus mastering, channel speed */
 260
 261        {ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET(data.dma.transfer),
 262         AML_OFFSET(dma.flags),
 263         0},
 264
 265        {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.dma.bus_master),
 266         AML_OFFSET(dma.flags),
 267         2},
 268
 269        {ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET(data.dma.type),
 270         AML_OFFSET(dma.flags),
 271         5},
 272
 273        /* DMA channel mask bits */
 274
 275        {ACPI_RSC_BITMASK, ACPI_RS_OFFSET(data.dma.channels[0]),
 276         AML_OFFSET(dma.dma_channel_mask),
 277         ACPI_RS_OFFSET(data.dma.channel_count)}
 278};
 279
 280/*******************************************************************************
 281 *
 282 * acpi_rs_convert_fixed_dma
 283 *
 284 ******************************************************************************/
 285
 286struct acpi_rsconvert_info acpi_rs_convert_fixed_dma[4] = {
 287        {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_FIXED_DMA,
 288         ACPI_RS_SIZE(struct acpi_resource_fixed_dma),
 289         ACPI_RSC_TABLE_SIZE(acpi_rs_convert_fixed_dma)},
 290
 291        {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_FIXED_DMA,
 292         sizeof(struct aml_resource_fixed_dma),
 293         0},
 294
 295        /*
 296         * These fields are contiguous in both the source and destination:
 297         * request_lines
 298         * Channels
 299         */
 300        {ACPI_RSC_MOVE16, ACPI_RS_OFFSET(data.fixed_dma.request_lines),
 301         AML_OFFSET(fixed_dma.request_lines),
 302         2},
 303
 304        {ACPI_RSC_MOVE8, ACPI_RS_OFFSET(data.fixed_dma.width),
 305         AML_OFFSET(fixed_dma.width),
 306         1},
 307};
 308