kernel/drivers/acpi/acpica/rsirq.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: rsirq - IRQ resource descriptors
   4  *
   5  ******************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2015, 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
  49 ACPI_MODULE_NAME("rsirq")
  50
  51 /*******************************************************************************
  52  *
  53  * acpi_rs_get_irq
  54  *
  55  ******************************************************************************/
  56 struct 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
 108 struct 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
 192 struct 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
 250 struct 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
 286 struct 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 };