tools/firewire/decode-fcp.c

   1 #include <linux/firewire-constants.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4
   5 #include "list.h"
   6 #include "nosy-dump.h"
   7
   8 #define CSR_FCP_COMMAND                 0xfffff0000b00ull
   9 #define CSR_FCP_RESPONSE                0xfffff0000d00ull
  10
  11 static const char * const ctype_names[] = {
  12         [0x0] = "control",              [0x8] = "not implemented",
  13         [0x1] = "status",               [0x9] = "accepted",
  14         [0x2] = "specific inquiry",     [0xa] = "rejected",
  15         [0x3] = "notify",               [0xb] = "in transition",
  16         [0x4] = "general inquiry",      [0xc] = "stable",
  17         [0x5] = "(reserved 0x05)",      [0xd] = "changed",
  18         [0x6] = "(reserved 0x06)",      [0xe] = "(reserved 0x0e)",
  19         [0x7] = "(reserved 0x07)",      [0xf] = "interim",
  20 };
  21
  22 static const char * const subunit_type_names[] = {
  23         [0x00] = "monitor",             [0x10] = "(reserved 0x10)",
  24         [0x01] = "audio",               [0x11] = "(reserved 0x11)",
  25         [0x02] = "printer",             [0x12] = "(reserved 0x12)",
  26         [0x03] = "disc",                [0x13] = "(reserved 0x13)",
  27         [0x04] = "tape recorder/player",[0x14] = "(reserved 0x14)",
  28         [0x05] = "tuner",               [0x15] = "(reserved 0x15)",
  29         [0x06] = "ca",                  [0x16] = "(reserved 0x16)",
  30         [0x07] = "camera",              [0x17] = "(reserved 0x17)",
  31         [0x08] = "(reserved 0x08)",     [0x18] = "(reserved 0x18)",
  32         [0x09] = "panel",               [0x19] = "(reserved 0x19)",
  33         [0x0a] = "bulletin board",      [0x1a] = "(reserved 0x1a)",
  34         [0x0b] = "camera storage",      [0x1b] = "(reserved 0x1b)",
  35         [0x0c] = "(reserved 0x0c)",     [0x1c] = "vendor unique",
  36         [0x0d] = "(reserved 0x0d)",     [0x1d] = "all subunit types",
  37         [0x0e] = "(reserved 0x0e)",     [0x1e] = "subunit_type extended to next byte",
  38         [0x0f] = "(reserved 0x0f)",     [0x1f] = "unit",
  39 };
  40
  41 struct avc_enum {
  42         int value;
  43         const char *name;
  44 };
  45
  46 struct avc_field {
  47         const char *name;       /* Short name for field. */
  48         int offset;             /* Location of field, specified in bits; */
  49                                 /* negative means from end of packet.    */
  50         int width;              /* Width of field, 0 means use data_length. */
  51         struct avc_enum *names;
  52 };
  53
  54 struct avc_opcode_info {
  55         const char *name;
  56         struct avc_field fields[8];
  57 };
  58
  59 struct avc_enum power_field_names[] = {
  60         { 0x70, "on" },
  61         { 0x60, "off" },
  62         { }
  63 };
  64
  65 static const struct avc_opcode_info opcode_info[256] = {
  66
  67         /* TA Document 1999026 */
  68         /* AV/C Digital Interface Command Set General Specification 4.0 */
  69         [0xb2] = { "power", {
  70                         { "state", 0, 8, power_field_names }
  71                 }
  72         },
  73         [0x30] = { "unit info", {
  74                         { "foo", 0, 8 },
  75                         { "unit_type", 8, 5 },
  76                         { "unit", 13, 3 },
  77                         { "company id", 16, 24 },
  78                 }
  79         },
  80         [0x31] = { "subunit info" },
  81         [0x01] = { "reserve" },
  82         [0xb0] = { "version" },
  83         [0x00] = { "vendor dependent" },
  84         [0x02] = { "plug info" },
  85         [0x12] = { "channel usage" },
  86         [0x24] = { "connect" },
  87         [0x20] = { "connect av" },
  88         [0x22] = { "connections" },
  89         [0x11] = { "digital input" },
  90         [0x10] = { "digital output" },
  91         [0x25] = { "disconnect" },
  92         [0x21] = { "disconnect av" },
  93         [0x19] = { "input plug signal format" },
  94         [0x18] = { "output plug signal format" },
  95         [0x1f] = { "general bus setup" },
  96
  97         /* TA Document 1999025 */
  98         /* AV/C Descriptor Mechanism Specification Version 1.0 */
  99         [0x0c] = { "create descriptor" },
 100         [0x08] = { "open descriptor" },
 101         [0x09] = { "read descriptor" },
 102         [0x0a] = { "write descriptor" },
 103         [0x05] = { "open info block" },
 104         [0x06] = { "read info block" },
 105         [0x07] = { "write info block" },
 106         [0x0b] = { "search descriptor" },
 107         [0x0d] = { "object number select" },
 108
 109         /* TA Document 1999015 */
 110         /* AV/C Command Set for Rate Control of Isochronous Data Flow 1.0 */
 111         [0xb3] = { "rate", {
 112                         { "subfunction", 0, 8 },
 113                         { "result", 8, 8 },
 114                         { "plug_type", 16, 8 },
 115                         { "plug_id", 16, 8 },
 116                 }
 117         },
 118
 119         /* TA Document 1999008 */
 120         /* AV/C Audio Subunit Specification 1.0 */
 121         [0xb8] = { "function block" },
 122
 123         /* TA Document 2001001 */
 124         /* AV/C Panel Subunit Specification 1.1 */
 125         [0x7d] = { "gui update" },
 126         [0x7e] = { "push gui data" },
 127         [0x7f] = { "user action" },
 128         [0x7c] = { "pass through" },
 129
 130         /* */
 131         [0x26] = { "asynchronous connection" },
 132 };
 133
 134 struct avc_frame {
 135         uint32_t operand0:8;
 136         uint32_t opcode:8;
 137         uint32_t subunit_id:3;
 138         uint32_t subunit_type:5;
 139         uint32_t ctype:4;
 140         uint32_t cts:4;
 141 };
 142
 143 static void
 144 decode_avc(struct link_transaction *t)
 145 {
 146         struct avc_frame *frame =
 147             (struct avc_frame *) t->request->packet.write_block.data;
 148         const struct avc_opcode_info *info;
 149         const char *name;
 150         char buffer[32];
 151         int i;
 152
 153         info = &opcode_info[frame->opcode];
 154         if (info->name == NULL) {
 155                 snprintf(buffer, sizeof(buffer),
 156                          "(unknown opcode 0x%02x)", frame->opcode);
 157                 name = buffer;
 158         } else {
 159                 name = info->name;
 160         }
 161
 162         printf("av/c %s, subunit_type=%s, subunit_id=%d, opcode=%s",
 163             ctype_names[frame->ctype], subunit_type_names[frame->subunit_type],
 164             frame->subunit_id, name);
 165
 166         for (i = 0; info->fields[i].name != NULL; i++)
 167                 printf(", %s", info->fields[i].name);
 168
 169         printf("\n");
 170 }
 171
 172 int
 173 decode_fcp(struct link_transaction *t)
 174 {
 175         struct avc_frame *frame =
 176             (struct avc_frame *) t->request->packet.write_block.data;
 177         unsigned long long offset =
 178             ((unsigned long long) t->request->packet.common.offset_high << 32) |
 179             t->request->packet.common.offset_low;
 180
 181         if (t->request->packet.common.tcode != TCODE_WRITE_BLOCK_REQUEST)
 182                 return 0;
 183
 184         if (offset == CSR_FCP_COMMAND || offset == CSR_FCP_RESPONSE) {
 185                 switch (frame->cts) {
 186                 case 0x00:
 187                         decode_avc(t);
 188                         break;
 189                 case 0x01:
 190                         printf("cal fcp frame (cts=0x01)\n");
 191                         break;
 192                 case 0x02:
 193                         printf("ehs fcp frame (cts=0x02)\n");
 194                         break;
 195                 case 0x03:
 196                         printf("havi fcp frame (cts=0x03)\n");
 197                         break;
 198                 case 0x0e:
 199                         printf("vendor specific fcp frame (cts=0x0e)\n");
 200                         break;
 201                 case 0x0f:
 202                         printf("extended cts\n");
 203                         break;
 204                 default:
 205                         printf("reserved fcp frame (ctx=0x%02x)\n", frame->cts);
 206                         break;
 207                 }
 208                 return 1;
 209         }
 210
 211         return 0;
 212 }
 213