tools/firewire/decode-fcp.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/firewire-constants.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5
   6 #include "list.h"
   7 #include "nosy-dump.h"
   8
   9 #define CSR_FCP_COMMAND                 0xfffff0000b00ull
  10 #define CSR_FCP_RESPONSE                0xfffff0000d00ull
  11
  12 static const char * const ctype_names[] = {
  13         [0x0] = "control",              [0x8] = "not implemented",
  14         [0x1] = "status",               [0x9] = "accepted",
  15         [0x2] = "specific inquiry",     [0xa] = "rejected",
  16         [0x3] = "notify",               [0xb] = "in transition",
  17         [0x4] = "general inquiry",      [0xc] = "stable",
  18         [0x5] = "(reserved 0x05)",      [0xd] = "changed",
  19         [0x6] = "(reserved 0x06)",      [0xe] = "(reserved 0x0e)",
  20         [0x7] = "(reserved 0x07)",      [0xf] = "interim",
  21 };
  22
  23 static const char * const subunit_type_names[] = {
  24         [0x00] = "monitor",             [0x10] = "(reserved 0x10)",
  25         [0x01] = "audio",               [0x11] = "(reserved 0x11)",
  26         [0x02] = "printer",             [0x12] = "(reserved 0x12)",
  27         [0x03] = "disc",                [0x13] = "(reserved 0x13)",
  28         [0x04] = "tape recorder/player",[0x14] = "(reserved 0x14)",
  29         [0x05] = "tuner",               [0x15] = "(reserved 0x15)",
  30         [0x06] = "ca",                  [0x16] = "(reserved 0x16)",
  31         [0x07] = "camera",              [0x17] = "(reserved 0x17)",
  32         [0x08] = "(reserved 0x08)",     [0x18] = "(reserved 0x18)",
  33         [0x09] = "panel",               [0x19] = "(reserved 0x19)",
  34         [0x0a] = "bulletin board",      [0x1a] = "(reserved 0x1a)",
  35         [0x0b] = "camera storage",      [0x1b] = "(reserved 0x1b)",
  36         [0x0c] = "(reserved 0x0c)",     [0x1c] = "vendor unique",
  37         [0x0d] = "(reserved 0x0d)",     [0x1d] = "all subunit types",
  38         [0x0e] = "(reserved 0x0e)",     [0x1e] = "subunit_type extended to next byte",
  39         [0x0f] = "(reserved 0x0f)",     [0x1f] = "unit",
  40 };
  41
  42 struct avc_enum {
  43         int value;
  44         const char *name;
  45 };
  46
  47 struct avc_field {
  48         const char *name;       /* Short name for field. */
  49         int offset;             /* Location of field, specified in bits; */
  50                                 /* negative means from end of packet.    */
  51         int width;              /* Width of field, 0 means use data_length. */
  52         struct avc_enum *names;
  53 };
  54
  55 struct avc_opcode_info {
  56         const char *name;
  57         struct avc_field fields[8];
  58 };
  59
  60 struct avc_enum power_field_names[] = {
  61         { 0x70, "on" },
  62         { 0x60, "off" },
  63         { }
  64 };
  65
  66 static const struct avc_opcode_info opcode_info[256] = {
  67
  68         /* TA Document 1999026 */
  69         /* AV/C Digital Interface Command Set General Specification 4.0 */
  70         [0xb2] = { "power", {
  71                         { "state", 0, 8, power_field_names }
  72                 }
  73         },
  74         [0x30] = { "unit info", {
  75                         { "foo", 0, 8 },
  76                         { "unit_type", 8, 5 },
  77                         { "unit", 13, 3 },
  78                         { "company id", 16, 24 },
  79                 }
  80         },
  81         [0x31] = { "subunit info" },
  82         [0x01] = { "reserve" },
  83         [0xb0] = { "version" },
  84         [0x00] = { "vendor dependent" },
  85         [0x02] = { "plug info" },
  86         [0x12] = { "channel usage" },
  87         [0x24] = { "connect" },
  88         [0x20] = { "connect av" },
  89         [0x22] = { "connections" },
  90         [0x11] = { "digital input" },
  91         [0x10] = { "digital output" },
  92         [0x25] = { "disconnect" },
  93         [0x21] = { "disconnect av" },
  94         [0x19] = { "input plug signal format" },
  95         [0x18] = { "output plug signal format" },
  96         [0x1f] = { "general bus setup" },
  97
  98         /* TA Document 1999025 */
  99         /* AV/C Descriptor Mechanism Specification Version 1.0 */
 100         [0x0c] = { "create descriptor" },
 101         [0x08] = { "open descriptor" },
 102         [0x09] = { "read descriptor" },
 103         [0x0a] = { "write descriptor" },
 104         [0x05] = { "open info block" },
 105         [0x06] = { "read info block" },
 106         [0x07] = { "write info block" },
 107         [0x0b] = { "search descriptor" },
 108         [0x0d] = { "object number select" },
 109
 110         /* TA Document 1999015 */
 111         /* AV/C Command Set for Rate Control of Isochronous Data Flow 1.0 */
 112         [0xb3] = { "rate", {
 113                         { "subfunction", 0, 8 },
 114                         { "result", 8, 8 },
 115                         { "plug_type", 16, 8 },
 116                         { "plug_id", 16, 8 },
 117                 }
 118         },
 119
 120         /* TA Document 1999008 */
 121         /* AV/C Audio Subunit Specification 1.0 */
 122         [0xb8] = { "function block" },
 123
 124         /* TA Document 2001001 */
 125         /* AV/C Panel Subunit Specification 1.1 */
 126         [0x7d] = { "gui update" },
 127         [0x7e] = { "push gui data" },
 128         [0x7f] = { "user action" },
 129         [0x7c] = { "pass through" },
 130
 131         /* */
 132         [0x26] = { "asynchronous connection" },
 133 };
 134
 135 struct avc_frame {
 136         uint32_t operand0:8;
 137         uint32_t opcode:8;
 138         uint32_t subunit_id:3;
 139         uint32_t subunit_type:5;
 140         uint32_t ctype:4;
 141         uint32_t cts:4;
 142 };
 143
 144 static void
 145 decode_avc(struct link_transaction *t)
 146 {
 147         struct avc_frame *frame =
 148             (struct avc_frame *) t->request->packet.write_block.data;
 149         const struct avc_opcode_info *info;
 150         const char *name;
 151         char buffer[32];
 152         int i;
 153
 154         info = &opcode_info[frame->opcode];
 155         if (info->name == NULL) {
 156                 snprintf(buffer, sizeof(buffer),
 157                          "(unknown opcode 0x%02x)", frame->opcode);
 158                 name = buffer;
 159         } else {
 160                 name = info->name;
 161         }
 162
 163         printf("av/c %s, subunit_type=%s, subunit_id=%d, opcode=%s",
 164             ctype_names[frame->ctype], subunit_type_names[frame->subunit_type],
 165             frame->subunit_id, name);
 166
 167         for (i = 0; info->fields[i].name != NULL; i++)
 168                 printf(", %s", info->fields[i].name);
 169
 170         printf("\n");
 171 }
 172
 173 int
 174 decode_fcp(struct link_transaction *t)
 175 {
 176         struct avc_frame *frame =
 177             (struct avc_frame *) t->request->packet.write_block.data;
 178         unsigned long long offset =
 179             ((unsigned long long) t->request->packet.common.offset_high << 32) |
 180             t->request->packet.common.offset_low;
 181
 182         if (t->request->packet.common.tcode != TCODE_WRITE_BLOCK_REQUEST)
 183                 return 0;
 184
 185         if (offset == CSR_FCP_COMMAND || offset == CSR_FCP_RESPONSE) {
 186                 switch (frame->cts) {
 187                 case 0x00:
 188                         decode_avc(t);
 189                         break;
 190                 case 0x01:
 191                         printf("cal fcp frame (cts=0x01)\n");
 192                         break;
 193                 case 0x02:
 194                         printf("ehs fcp frame (cts=0x02)\n");
 195                         break;
 196                 case 0x03:
 197                         printf("havi fcp frame (cts=0x03)\n");
 198                         break;
 199                 case 0x0e:
 200                         printf("vendor specific fcp frame (cts=0x0e)\n");
 201                         break;
 202                 case 0x0f:
 203                         printf("extended cts\n");
 204                         break;
 205                 default:
 206                         printf("reserved fcp frame (ctx=0x%02x)\n", frame->cts);
 207                         break;
 208                 }
 209                 return 1;
 210         }
 211
 212         return 0;
 213 }
 214