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      1 /*
      2  * Copyright (C) 2007 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include <stdio.h>
     18 #include <stdlib.h>
     19 #include <string.h>
     20 
     21 #include <sysdeps.h>
     22 
     23 #define  TRACE_TAG  TRACE_TRANSPORT
     24 #include "adb.h"
     25 
     26 #if ADB_HOST
     27 #include "usb_vendors.h"
     28 #endif
     29 
     30 #ifdef HAVE_BIG_ENDIAN
     31 #define H4(x)	(((x) & 0xFF000000) >> 24) | (((x) & 0x00FF0000) >> 8) | (((x) & 0x0000FF00) << 8) | (((x) & 0x000000FF) << 24)
     32 static inline void fix_endians(apacket *p)
     33 {
     34     p->msg.command     = H4(p->msg.command);
     35     p->msg.arg0        = H4(p->msg.arg0);
     36     p->msg.arg1        = H4(p->msg.arg1);
     37     p->msg.data_length = H4(p->msg.data_length);
     38     p->msg.data_check  = H4(p->msg.data_check);
     39     p->msg.magic       = H4(p->msg.magic);
     40 }
     41 unsigned host_to_le32(unsigned n)
     42 {
     43     return H4(n);
     44 }
     45 #else
     46 #define fix_endians(p) do {} while (0)
     47 unsigned host_to_le32(unsigned n)
     48 {
     49     return n;
     50 }
     51 #endif
     52 
     53 static int remote_read(apacket *p, atransport *t)
     54 {
     55     if(usb_read(t->usb, &p->msg, sizeof(amessage))){
     56         D("remote usb: read terminated (message)\n");
     57         return -1;
     58     }
     59 
     60     fix_endians(p);
     61 
     62     if(check_header(p)) {
     63         D("remote usb: check_header failed\n");
     64         return -1;
     65     }
     66 
     67     if(p->msg.data_length) {
     68         if(usb_read(t->usb, p->data, p->msg.data_length)){
     69             D("remote usb: terminated (data)\n");
     70             return -1;
     71         }
     72     }
     73 
     74     if(check_data(p)) {
     75         D("remote usb: check_data failed\n");
     76         return -1;
     77     }
     78 
     79     return 0;
     80 }
     81 
     82 static int remote_write(apacket *p, atransport *t)
     83 {
     84     unsigned size = p->msg.data_length;
     85 
     86     fix_endians(p);
     87 
     88     if(usb_write(t->usb, &p->msg, sizeof(amessage))) {
     89         D("remote usb: 1 - write terminated\n");
     90         return -1;
     91     }
     92     if(p->msg.data_length == 0) return 0;
     93     if(usb_write(t->usb, &p->data, size)) {
     94         D("remote usb: 2 - write terminated\n");
     95         return -1;
     96     }
     97 
     98     return 0;
     99 }
    100 
    101 static void remote_close(atransport *t)
    102 {
    103     usb_close(t->usb);
    104     t->usb = 0;
    105 }
    106 
    107 static void remote_kick(atransport *t)
    108 {
    109     usb_kick(t->usb);
    110 }
    111 
    112 void init_usb_transport(atransport *t, usb_handle *h, int state)
    113 {
    114     D("transport: usb\n");
    115     t->close = remote_close;
    116     t->kick = remote_kick;
    117     t->read_from_remote = remote_read;
    118     t->write_to_remote = remote_write;
    119     t->sync_token = 1;
    120     t->connection_state = state;
    121     t->type = kTransportUsb;
    122     t->usb = h;
    123 
    124 #if ADB_HOST
    125     HOST = 1;
    126 #else
    127     HOST = 0;
    128 #endif
    129 }
    130 
    131 #if ADB_HOST
    132 int is_adb_interface(int vid, int pid, int usb_class, int usb_subclass, int usb_protocol)
    133 {
    134     unsigned i;
    135     for (i = 0; i < vendorIdCount; i++) {
    136         if (vid == vendorIds[i]) {
    137             if (usb_class == ADB_CLASS && usb_subclass == ADB_SUBCLASS &&
    138                     usb_protocol == ADB_PROTOCOL) {
    139                 return 1;
    140             }
    141 
    142             return 0;
    143         }
    144     }
    145 
    146     return 0;
    147 }
    148 #endif
    149