1 files changed, 213 insertions, 0 deletions

diff --git a/tools/firewire/decode-fcp.c b/tools/firewire/decode-fcp.c
new file mode 100644
index 000000000000..e41223b6a4c8
--- /dev/null
+++ b/tools/firewire/decode-fcp.c
@@ -0,0 +1,213 @@
+#include <linux/firewire-constants.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "list.h"
+#include "nosy-dump.h"
+
+#define CSR_FCP_COMMAND                 0xfffff0000b00ull
+#define CSR_FCP_RESPONSE                0xfffff0000d00ull
+
+static const char * const ctype_names[] = {
+        [0x0] = "control",              [0x8] = "not implemented",
+        [0x1] = "status",               [0x9] = "accepted",
+        [0x2] = "specific inquiry",     [0xa] = "rejected",
+        [0x3] = "notify",               [0xb] = "in transition",
+        [0x4] = "general inquiry",      [0xc] = "stable",
+        [0x5] = "(reserved 0x05)",      [0xd] = "changed",
+        [0x6] = "(reserved 0x06)",      [0xe] = "(reserved 0x0e)",
+        [0x7] = "(reserved 0x07)",      [0xf] = "interim",
+};
+
+static const char * const subunit_type_names[] = {
+        [0x00] = "monitor",             [0x10] = "(reserved 0x10)",
+        [0x01] = "audio",               [0x11] = "(reserved 0x11)",
+        [0x02] = "printer",             [0x12] = "(reserved 0x12)",
+        [0x03] = "disc",                [0x13] = "(reserved 0x13)",
+        [0x04] = "tape recorder/player",[0x14] = "(reserved 0x14)",
+        [0x05] = "tuner",               [0x15] = "(reserved 0x15)",
+        [0x06] = "ca",                  [0x16] = "(reserved 0x16)",
+        [0x07] = "camera",              [0x17] = "(reserved 0x17)",
+        [0x08] = "(reserved 0x08)",     [0x18] = "(reserved 0x18)",
+        [0x09] = "panel",               [0x19] = "(reserved 0x19)",
+        [0x0a] = "bulletin board",      [0x1a] = "(reserved 0x1a)",
+        [0x0b] = "camera storage",      [0x1b] = "(reserved 0x1b)",
+        [0x0c] = "(reserved 0x0c)",     [0x1c] = "vendor unique",
+        [0x0d] = "(reserved 0x0d)",     [0x1d] = "all subunit types",
+        [0x0e] = "(reserved 0x0e)",     [0x1e] = "subunit_type extended to next byte",
+        [0x0f] = "(reserved 0x0f)",     [0x1f] = "unit",
+};
+
+struct avc_enum {
+        int value;
+        const char *name;
+};
+
+struct avc_field {
+        const char *name;       /* Short name for field. */
+        int offset;             /* Location of field, specified in bits; */
+                                /* negative means from end of packet.    */
+        int width;              /* Width of field, 0 means use data_length. */
+        struct avc_enum *names;
+};
+
+struct avc_opcode_info {
+        const char *name;
+        struct avc_field fields[8];
+};
+
+struct avc_enum power_field_names[] = {
+        { 0x70, "on" },
+        { 0x60, "off" },
+        { }
+};
+
+static const struct avc_opcode_info opcode_info[256] = {
+
+        /* TA Document 1999026 */
+        /* AV/C Digital Interface Command Set General Specification 4.0 */
+        [0xb2] = { "power", {
+                        { "state", 0, 8, power_field_names }
+                }
+        },
+        [0x30] = { "unit info", {
+                        { "foo", 0, 8 },
+                        { "unit_type", 8, 5 },
+                        { "unit", 13, 3 },
+                        { "company id", 16, 24 },
+                }
+        },
+        [0x31] = { "subunit info" },
+        [0x01] = { "reserve" },
+        [0xb0] = { "version" },
+        [0x00] = { "vendor dependent" },
+        [0x02] = { "plug info" },
+        [0x12] = { "channel usage" },
+        [0x24] = { "connect" },
+        [0x20] = { "connect av" },
+        [0x22] = { "connections" },
+        [0x11] = { "digital input" },
+        [0x10] = { "digital output" },
+        [0x25] = { "disconnect" },
+        [0x21] = { "disconnect av" },
+        [0x19] = { "input plug signal format" },
+        [0x18] = { "output plug signal format" },
+        [0x1f] = { "general bus setup" },
+
+        /* TA Document 1999025 */
+        /* AV/C Descriptor Mechanism Specification Version 1.0 */
+        [0x0c] = { "create descriptor" },
+        [0x08] = { "open descriptor" },
+        [0x09] = { "read descriptor" },
+        [0x0a] = { "write descriptor" },
+        [0x05] = { "open info block" },
+        [0x06] = { "read info block" },
+        [0x07] = { "write info block" },
+        [0x0b] = { "search descriptor" },
+        [0x0d] = { "object number select" },
+
+        /* TA Document 1999015 */
+        /* AV/C Command Set for Rate Control of Isochronous Data Flow 1.0 */
+        [0xb3] = { "rate", {
+                        { "subfunction", 0, 8 },
+                        { "result", 8, 8 },
+                        { "plug_type", 16, 8 },
+                        { "plug_id", 16, 8 },
+                }
+        },
+
+        /* TA Document 1999008 */
+        /* AV/C Audio Subunit Specification 1.0 */
+        [0xb8] = { "function block" },
+
+        /* TA Document 2001001 */
+        /* AV/C Panel Subunit Specification 1.1 */
+        [0x7d] = { "gui update" },
+        [0x7e] = { "push gui data" },
+        [0x7f] = { "user action" },
+        [0x7c] = { "pass through" },
+
+        /* */
+        [0x26] = { "asynchronous connection" },
+};
+
+struct avc_frame {
+        uint32_t operand0:8;
+        uint32_t opcode:8;
+        uint32_t subunit_id:3;
+        uint32_t subunit_type:5;
+        uint32_t ctype:4;
+        uint32_t cts:4;
+};
+
+static void
+decode_avc(struct link_transaction *t)
+{
+        struct avc_frame *frame =
+            (struct avc_frame *) t->request->packet.write_block.data;
+        const struct avc_opcode_info *info;
+        const char *name;
+        char buffer[32];
+        int i;
+
+        info = &opcode_info[frame->opcode];
+        if (info->name == NULL) {
+                snprintf(buffer, sizeof(buffer),
+                         "(unknown opcode 0x%02x)", frame->opcode);
+                name = buffer;
+        } else {
+                name = info->name;
+        }
+
+        printf("av/c %s, subunit_type=%s, subunit_id=%d, opcode=%s",
+            ctype_names[frame->ctype], subunit_type_names[frame->subunit_type],
+            frame->subunit_id, name);
+
+        for (i = 0; info->fields[i].name != NULL; i++)
+                printf(", %s", info->fields[i].name);
+
+        printf("\n");
+}
+
+int
+decode_fcp(struct link_transaction *t)
+{
+        struct avc_frame *frame =
+            (struct avc_frame *) t->request->packet.write_block.data;
+        unsigned long long offset =
+            ((unsigned long long) t->request->packet.common.offset_high << 32) |
+            t->request->packet.common.offset_low;
+
+        if (t->request->packet.common.tcode != TCODE_WRITE_BLOCK_REQUEST)
+                return 0;
+
+        if (offset == CSR_FCP_COMMAND || offset == CSR_FCP_RESPONSE) {
+                switch (frame->cts) {
+                case 0x00:
+                        decode_avc(t);
+                        break;
+                case 0x01:
+                        printf("cal fcp frame (cts=0x01)\n");
+                        break;
+                case 0x02:
+                        printf("ehs fcp frame (cts=0x02)\n");
+                        break;
+                case 0x03:
+                        printf("havi fcp frame (cts=0x03)\n");
+                        break;
+                case 0x0e:
+                        printf("vendor specific fcp frame (cts=0x0e)\n");
+                        break;
+                case 0x0f:
+                        printf("extended cts\n");
+                        break;
+                default:
+                        printf("reserved fcp frame (ctx=0x%02x)\n", frame->cts);
+                        break;
+                }
+                return 1;
+        }
+
+        return 0;
+}
+