tools/firewire/decode-fcp.c

   1 #include <stdlib.h>
   2 #include <stdio.h>
   3 #include "list.h"
   4 #include "nosy-dump.h"
   5
   6 #define CSR_FCP_COMMAND                 0xfffff0000b00ull
   7 #define CSR_FCP_RESPONSE                0xfffff0000d00ull
   8
   9 static const char * const ctype_names[16] = {
  10     "control",
  11     "status",
  12     "specific inquiry",
  13     "notify",
  14     "general inquiry",
  15     "(reserved 0x05)",
  16     "(reserved 0x06)",
  17     "(reserved 0x07)",
  18     "not implemented",
  19     "accepted",
  20     "rejected",
  21     "in transition",
  22     "stable",
  23     "changed",
  24     "(reserved 0x0e)",
  25     "interim"
  26 };
  27
  28 static const char * const subunit_type_names[32] = {
  29     "monitor",
  30     "audio",
  31     "printer",
  32     "disc",
  33     "tape recorder/player",
  34     "tuner",
  35     "ca",
  36     "camera",
  37     "(reserved 0x08)",
  38     "panel",
  39     "bulletin board",
  40     "camera storage",
  41     "(reserved 0x0c)",
  42     "(reserved 0x0d)",
  43     "(reserved 0x0e)",
  44     "(reserved 0x0f)",
  45     "(reserved 0x10)",
  46     "(reserved 0x11)",
  47     "(reserved 0x12)",
  48     "(reserved 0x13)",
  49     "(reserved 0x14)",
  50     "(reserved 0x15)",
  51     "(reserved 0x16)",
  52     "(reserved 0x17)",
  53     "(reserved 0x18)",
  54     "(reserved 0x19)",
  55     "(reserved 0x1a)",
  56     "(reserved 0x1b)",
  57     "vendor unique",
  58     "all subunit types",
  59     "subunit_type extended to next byte",
  60     "unit"
  61 };
  62
  63 struct avc_enum {
  64     int value;
  65     const char *name;
  66 };
  67
  68 struct avc_field {
  69   const char *name;     /* Short name for field. */
  70   int offset;           /* Location of field, specified in bits.
  71                          * Negative means from end of packet */
  72   int width;            /* Width of field, 0 means use data_length. */
  73   struct avc_enum *names;
  74 };
  75
  76 struct avc_opcode_info {
  77     const char *name;
  78     struct avc_field fields[8];
  79 };
  80
  81 struct avc_enum power_field_names[] = {
  82     { 0x70, "on" },
  83     { 0x60, "off" },
  84     { }
  85 };
  86
  87 static const struct avc_opcode_info opcode_info[256] = {
  88
  89     /* TA Document 1999026
  90      * AV/C Digital Interface Command Set General Specification
  91      * Version 4.0 */
  92     [0xb2] =
  93     { "power", {
  94             { "state", 0, 8, power_field_names }
  95         }
  96     },
  97     [0x30] =
  98     { "unit info", {
  99             { "foo", 0, 8 },
 100             { "unit_type", 8, 5 },
 101             { "unit", 13, 3 },
 102             { "company id", 16, 24 },
 103         }
 104     },
 105     [0x31] = { "subunit info" },
 106     [0x01] = { "reserve" },
 107     [0xb0] = { "version" },
 108     [0x00] = { "vendor dependent" },
 109
 110     [0x02] = { "plug info" },
 111     [0x12] = { "channel usage" },
 112     [0x24] = { "connect" },
 113     [0x20] = { "connect av" },
 114     [0x22] = { "connections" },
 115     [0x11] = { "digital input" },
 116     [0x10] = { "digital output" },
 117     [0x25] = { "disconnect" },
 118     [0x21] = { "disconnect av" },
 119     [0x19] = { "input plug signal format" },
 120     [0x18] = { "output plug signal format" },
 121     [0x1f] = { "general bus setup" },
 122
 123     /* TA Document 1999025
 124      * AV/C Descriptor Mechanism Specification Version 1.0 */
 125     [0x0c] = { "create descriptor" },
 126     [0x08] = { "open descriptor" },
 127     [0x09] = { "read descriptor" },
 128     [0x0a] = { "write descriptor" },
 129     [0x05] = { "open info block" },
 130     [0x06] = { "read info block" },
 131     [0x07] = { "write info block" },
 132     [0x0b] = { "search descriptor" },
 133     [0x0d] = { "object number select" },
 134
 135     /* TA Document 1999015
 136      * AV/C Command Set for Rate Control of Isochronous Data Flow 1.0 */
 137     [0xb3] = { "rate", {
 138             { "subfunction", 0, 8 },
 139             { "result", 8, 8 },
 140             { "plug_type", 16, 8 },
 141             { "plug_id", 16, 8 },
 142         }
 143     },
 144
 145     /* TA Document 1999008
 146      * AV/C Audio Subunit Specification 1.0 */
 147     [0xb8] = { "function block" },
 148
 149     /* TA Document 2001001
 150      * AV/C Panel Subunit Specification 1.1 */
 151     [0x7d] = { "gui update" },
 152     [0x7e] = { "push gui data" },
 153     [0x7f] = { "user action" },
 154     [0x7c] = { "pass through" },
 155
 156     /* */
 157     [0x26] = { "asynchronous connection" },
 158 };
 159
 160 struct avc_frame {
 161     unsigned int operand0 : 8;
 162     unsigned int opcode : 8;
 163     unsigned int subunit_id : 3;
 164     unsigned int subunit_type : 5;
 165     unsigned int ctype : 4;
 166     unsigned int cts : 4;
 167 };
 168
 169 static void
 170 decode_avc(struct link_transaction *t)
 171 {
 172     struct avc_frame *frame = (struct avc_frame *) t->request->packet.write_block.data;
 173     const struct avc_opcode_info *info;
 174     const char *name;
 175     char buffer[32];
 176     int i;
 177
 178     info = &opcode_info[frame->opcode];
 179     if (info->name == NULL) {
 180         snprintf(buffer, sizeof buffer, "(unknown opcode 0x%02x)", frame->opcode);
 181         name = buffer;
 182     } else {
 183         name = info->name;
 184     }
 185
 186     printf("av/c %s, subunit_type=%s, subunit_id=%d, opcode=%s",
 187            ctype_names[frame->ctype], subunit_type_names[frame->subunit_type],
 188            frame->subunit_id, name);
 189
 190     for (i = 0; info->fields[i].name != NULL; i++) {
 191         printf(", %s", info->fields[i].name);
 192     }
 193
 194     printf("\n");
 195 }
 196
 197
 198 int
 199 decode_fcp(struct link_transaction *t)
 200 {
 201     struct avc_frame *frame = (struct avc_frame *) t->request->packet.write_block.data;
 202     unsigned long long offset;
 203
 204     offset = ((unsigned long long) t->request->packet.common.offset_high << 32) |
 205         t->request->packet.common.offset_low;
 206
 207     if (t->request->packet.common.tcode != TCODE_WRITE_BLOCK)
 208         return 0;
 209
 210     if (offset == CSR_FCP_COMMAND || offset == CSR_FCP_RESPONSE) {
 211         switch (frame->cts) {
 212         case 0x00:
 213             decode_avc(t);
 214             break;
 215         case 0x01:
 216             printf("cal fcp frame (cts=0x01)\n");
 217             break;
 218         case 0x02:
 219             printf("ehs fcp frame (cts=0x02)\n");
 220             break;
 221         case 0x03:
 222             printf("havi fcp frame (cts=0x03)\n");
 223             break;
 224         case 0x0e:
 225             printf("vendor specific fcp frame (cts=0x0e)\n");
 226             break;
 227         case 0x0f:
 228             printf("extended cts\n");
 229             break;
 230         default:
 231             printf("reserved fcp frame (ctx=0x%02x)\n", frame->cts);
 232             break;
 233         }
 234         return 1;
 235     }
 236
 237     return 0;
 238 }
 239