drivers/acpi/resources/rsirq.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: rsirq - IRQ resource descriptors
   4  *
   5  ******************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2008, 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 <acpi/acresrc.h>
  46
  47 #define _COMPONENT          ACPI_RESOURCES
  48 ACPI_MODULE_NAME("rsirq")
  49
  50 /*******************************************************************************
  51  *
  52  * acpi_rs_get_irq
  53  *
  54  ******************************************************************************/
  55 struct acpi_rsconvert_info acpi_rs_get_irq[8] = {
  56         {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_IRQ,
  57          ACPI_RS_SIZE(struct acpi_resource_irq),
  58          ACPI_RSC_TABLE_SIZE(acpi_rs_get_irq)},
  59
  60         /* Get the IRQ mask (bytes 1:2) */
  61
  62         {ACPI_RSC_BITMASK16, ACPI_RS_OFFSET(data.irq.interrupts[0]),
  63          AML_OFFSET(irq.irq_mask),
  64          ACPI_RS_OFFSET(data.irq.interrupt_count)},
  65
  66         /* Set default flags (others are zero) */
  67
  68         {ACPI_RSC_SET8, ACPI_RS_OFFSET(data.irq.triggering),
  69          ACPI_EDGE_SENSITIVE,
  70          1},
  71
  72         /* Get the descriptor length (2 or 3 for IRQ descriptor) */
  73
  74         {ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET(data.irq.descriptor_length),
  75          AML_OFFSET(irq.descriptor_type),
  76          0},
  77
  78         /* All done if no flag byte present in descriptor */
  79
  80         {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_AML_LENGTH, 0, 3},
  81
  82         /* Get flags: Triggering[0], Polarity[3], Sharing[4] */
  83
  84         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.triggering),
  85          AML_OFFSET(irq.flags),
  86          0},
  87
  88         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.polarity),
  89          AML_OFFSET(irq.flags),
  90          3},
  91
  92         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.sharable),
  93          AML_OFFSET(irq.flags),
  94          4}
  95 };
  96
  97 /*******************************************************************************
  98  *
  99  * acpi_rs_set_irq
 100  *
 101  ******************************************************************************/
 102
 103 struct acpi_rsconvert_info acpi_rs_set_irq[13] = {
 104         /* Start with a default descriptor of length 3 */
 105
 106         {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_IRQ,
 107          sizeof(struct aml_resource_irq),
 108          ACPI_RSC_TABLE_SIZE(acpi_rs_set_irq)},
 109
 110         /* Convert interrupt list to 16-bit IRQ bitmask */
 111
 112         {ACPI_RSC_BITMASK16, ACPI_RS_OFFSET(data.irq.interrupts[0]),
 113          AML_OFFSET(irq.irq_mask),
 114          ACPI_RS_OFFSET(data.irq.interrupt_count)},
 115
 116         /* Set the flags byte */
 117
 118         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.triggering),
 119          AML_OFFSET(irq.flags),
 120          0},
 121
 122         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.polarity),
 123          AML_OFFSET(irq.flags),
 124          3},
 125
 126         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.sharable),
 127          AML_OFFSET(irq.flags),
 128          4},
 129
 130         /*
 131          * All done if the output descriptor length is required to be 3
 132          * (i.e., optimization to 2 bytes cannot be attempted)
 133          */
 134         {ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
 135          ACPI_RS_OFFSET(data.irq.descriptor_length),
 136          3},
 137
 138         /* Set length to 2 bytes (no flags byte) */
 139
 140         {ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq_noflags)},
 141
 142         /*
 143          * All done if the output descriptor length is required to be 2.
 144          *
 145          * TBD: Perhaps we should check for error if input flags are not
 146          * compatible with a 2-byte descriptor.
 147          */
 148         {ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
 149          ACPI_RS_OFFSET(data.irq.descriptor_length),
 150          2},
 151
 152         /* Reset length to 3 bytes (descriptor with flags byte) */
 153
 154         {ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq)},
 155
 156         /*
 157          * Check if the flags byte is necessary. Not needed if the flags are:
 158          * ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_HIGH, ACPI_EXCLUSIVE
 159          */
 160         {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
 161          ACPI_RS_OFFSET(data.irq.triggering),
 162          ACPI_EDGE_SENSITIVE},
 163
 164         {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
 165          ACPI_RS_OFFSET(data.irq.polarity),
 166          ACPI_ACTIVE_HIGH},
 167
 168         {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
 169          ACPI_RS_OFFSET(data.irq.sharable),
 170          ACPI_EXCLUSIVE},
 171
 172         /* We can optimize to a 2-byte irq_no_flags() descriptor */
 173
 174         {ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq_noflags)}
 175 };
 176
 177 /*******************************************************************************
 178  *
 179  * acpi_rs_convert_ext_irq
 180  *
 181  ******************************************************************************/
 182
 183 struct acpi_rsconvert_info acpi_rs_convert_ext_irq[9] = {
 184         {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_EXTENDED_IRQ,
 185          ACPI_RS_SIZE(struct acpi_resource_extended_irq),
 186          ACPI_RSC_TABLE_SIZE(acpi_rs_convert_ext_irq)},
 187
 188         {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_EXTENDED_IRQ,
 189          sizeof(struct aml_resource_extended_irq),
 190          0},
 191
 192         /* Flag bits */
 193
 194         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.producer_consumer),
 195          AML_OFFSET(extended_irq.flags),
 196          0},
 197
 198         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.triggering),
 199          AML_OFFSET(extended_irq.flags),
 200          1},
 201
 202         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.polarity),
 203          AML_OFFSET(extended_irq.flags),
 204          2},
 205
 206         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.sharable),
 207          AML_OFFSET(extended_irq.flags),
 208          3},
 209
 210         /* IRQ Table length (Byte4) */
 211
 212         {ACPI_RSC_COUNT, ACPI_RS_OFFSET(data.extended_irq.interrupt_count),
 213          AML_OFFSET(extended_irq.interrupt_count),
 214          sizeof(u32)}
 215         ,
 216
 217         /* Copy every IRQ in the table, each is 32 bits */
 218
 219         {ACPI_RSC_MOVE32, ACPI_RS_OFFSET(data.extended_irq.interrupts[0]),
 220          AML_OFFSET(extended_irq.interrupts[0]),
 221          0}
 222         ,
 223
 224         /* Optional resource_source (Index and String) */
 225
 226         {ACPI_RSC_SOURCEX, ACPI_RS_OFFSET(data.extended_irq.resource_source),
 227          ACPI_RS_OFFSET(data.extended_irq.interrupts[0]),
 228          sizeof(struct aml_resource_extended_irq)}
 229 };
 230
 231 /*******************************************************************************
 232  *
 233  * acpi_rs_convert_dma
 234  *
 235  ******************************************************************************/
 236
 237 struct acpi_rsconvert_info acpi_rs_convert_dma[6] = {
 238         {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_DMA,
 239          ACPI_RS_SIZE(struct acpi_resource_dma),
 240          ACPI_RSC_TABLE_SIZE(acpi_rs_convert_dma)},
 241
 242         {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_DMA,
 243          sizeof(struct aml_resource_dma),
 244          0},
 245
 246         /* Flags: transfer preference, bus mastering, channel speed */
 247
 248         {ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET(data.dma.transfer),
 249          AML_OFFSET(dma.flags),
 250          0},
 251
 252         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.dma.bus_master),
 253          AML_OFFSET(dma.flags),
 254          2},
 255
 256         {ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET(data.dma.type),
 257          AML_OFFSET(dma.flags),
 258          5},
 259
 260         /* DMA channel mask bits */
 261
 262         {ACPI_RSC_BITMASK, ACPI_RS_OFFSET(data.dma.channels[0]),
 263          AML_OFFSET(dma.dma_channel_mask),
 264          ACPI_RS_OFFSET(data.dma.channel_count)}
 265 };