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/accommon.h>
  46 #include <acpi/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[8] = {
  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] */
  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
  98 /*******************************************************************************
  99  *
 100  * acpi_rs_set_irq
 101  *
 102  ******************************************************************************/
 103
 104 struct acpi_rsconvert_info acpi_rs_set_irq[13] = {
 105         /* Start with a default descriptor of length 3 */
 106
 107         {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_IRQ,
 108          sizeof(struct aml_resource_irq),
 109          ACPI_RSC_TABLE_SIZE(acpi_rs_set_irq)},
 110
 111         /* Convert interrupt list to 16-bit IRQ bitmask */
 112
 113         {ACPI_RSC_BITMASK16, ACPI_RS_OFFSET(data.irq.interrupts[0]),
 114          AML_OFFSET(irq.irq_mask),
 115          ACPI_RS_OFFSET(data.irq.interrupt_count)},
 116
 117         /* Set the flags byte */
 118
 119         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.triggering),
 120          AML_OFFSET(irq.flags),
 121          0},
 122
 123         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.polarity),
 124          AML_OFFSET(irq.flags),
 125          3},
 126
 127         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.sharable),
 128          AML_OFFSET(irq.flags),
 129          4},
 130
 131         /*
 132          * All done if the output descriptor length is required to be 3
 133          * (i.e., optimization to 2 bytes cannot be attempted)
 134          */
 135         {ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
 136          ACPI_RS_OFFSET(data.irq.descriptor_length),
 137          3},
 138
 139         /* Set length to 2 bytes (no flags byte) */
 140
 141         {ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq_noflags)},
 142
 143         /*
 144          * All done if the output descriptor length is required to be 2.
 145          *
 146          * TBD: Perhaps we should check for error if input flags are not
 147          * compatible with a 2-byte descriptor.
 148          */
 149         {ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
 150          ACPI_RS_OFFSET(data.irq.descriptor_length),
 151          2},
 152
 153         /* Reset length to 3 bytes (descriptor with flags byte) */
 154
 155         {ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq)},
 156
 157         /*
 158          * Check if the flags byte is necessary. Not needed if the flags are:
 159          * ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_HIGH, ACPI_EXCLUSIVE
 160          */
 161         {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
 162          ACPI_RS_OFFSET(data.irq.triggering),
 163          ACPI_EDGE_SENSITIVE},
 164
 165         {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
 166          ACPI_RS_OFFSET(data.irq.polarity),
 167          ACPI_ACTIVE_HIGH},
 168
 169         {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
 170          ACPI_RS_OFFSET(data.irq.sharable),
 171          ACPI_EXCLUSIVE},
 172
 173         /* We can optimize to a 2-byte irq_no_flags() descriptor */
 174
 175         {ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq_noflags)}
 176 };
 177
 178 /*******************************************************************************
 179  *
 180  * acpi_rs_convert_ext_irq
 181  *
 182  ******************************************************************************/
 183
 184 struct acpi_rsconvert_info acpi_rs_convert_ext_irq[9] = {
 185         {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_EXTENDED_IRQ,
 186          ACPI_RS_SIZE(struct acpi_resource_extended_irq),
 187          ACPI_RSC_TABLE_SIZE(acpi_rs_convert_ext_irq)},
 188
 189         {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_EXTENDED_IRQ,
 190          sizeof(struct aml_resource_extended_irq),
 191          0},
 192
 193         /* Flag bits */
 194
 195         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.producer_consumer),
 196          AML_OFFSET(extended_irq.flags),
 197          0},
 198
 199         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.triggering),
 200          AML_OFFSET(extended_irq.flags),
 201          1},
 202
 203         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.polarity),
 204          AML_OFFSET(extended_irq.flags),
 205          2},
 206
 207         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.sharable),
 208          AML_OFFSET(extended_irq.flags),
 209          3},
 210
 211         /* IRQ Table length (Byte4) */
 212
 213         {ACPI_RSC_COUNT, ACPI_RS_OFFSET(data.extended_irq.interrupt_count),
 214          AML_OFFSET(extended_irq.interrupt_count),
 215          sizeof(u32)}
 216         ,
 217
 218         /* Copy every IRQ in the table, each is 32 bits */
 219
 220         {ACPI_RSC_MOVE32, ACPI_RS_OFFSET(data.extended_irq.interrupts[0]),
 221          AML_OFFSET(extended_irq.interrupts[0]),
 222          0}
 223         ,
 224
 225         /* Optional resource_source (Index and String) */
 226
 227         {ACPI_RSC_SOURCEX, ACPI_RS_OFFSET(data.extended_irq.resource_source),
 228          ACPI_RS_OFFSET(data.extended_irq.interrupts[0]),
 229          sizeof(struct aml_resource_extended_irq)}
 230 };
 231
 232 /*******************************************************************************
 233  *
 234  * acpi_rs_convert_dma
 235  *
 236  ******************************************************************************/
 237
 238 struct acpi_rsconvert_info acpi_rs_convert_dma[6] = {
 239         {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_DMA,
 240          ACPI_RS_SIZE(struct acpi_resource_dma),
 241          ACPI_RSC_TABLE_SIZE(acpi_rs_convert_dma)},
 242
 243         {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_DMA,
 244          sizeof(struct aml_resource_dma),
 245          0},
 246
 247         /* Flags: transfer preference, bus mastering, channel speed */
 248
 249         {ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET(data.dma.transfer),
 250          AML_OFFSET(dma.flags),
 251          0},
 252
 253         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.dma.bus_master),
 254          AML_OFFSET(dma.flags),
 255          2},
 256
 257         {ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET(data.dma.type),
 258          AML_OFFSET(dma.flags),
 259          5},
 260
 261         /* DMA channel mask bits */
 262
 263         {ACPI_RSC_BITMASK, ACPI_RS_OFFSET(data.dma.channels[0]),
 264          AML_OFFSET(dma.dma_channel_mask),
 265          ACPI_RS_OFFSET(data.dma.channel_count)}
 266 };