The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 The Android Open Source Project |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * * Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * * Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in |
| 12 | * the documentation and/or other materials provided with the |
| 13 | * distribution. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 16 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 17 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 18 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 19 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 21 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| 22 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 23 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 24 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 25 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 26 | * SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | #include <stdio.h> |
| 30 | #include <stdlib.h> |
| 31 | #include <string.h> |
| 32 | #include <errno.h> |
| 33 | |
| 34 | #include "fastboot.h" |
| 35 | |
| 36 | static char ERROR[128]; |
| 37 | |
| 38 | char *fb_get_error(void) |
| 39 | { |
| 40 | return ERROR; |
| 41 | } |
| 42 | |
| 43 | static int check_response(usb_handle *usb, unsigned size, |
| 44 | unsigned data_okay, char *response) |
| 45 | { |
| 46 | unsigned char status[65]; |
| 47 | int r; |
| 48 | |
| 49 | for(;;) { |
| 50 | r = usb_read(usb, status, 64); |
| 51 | if(r < 0) { |
| 52 | sprintf(ERROR, "status read failed (%s)", strerror(errno)); |
| 53 | usb_close(usb); |
| 54 | return -1; |
| 55 | } |
| 56 | status[r] = 0; |
| 57 | |
| 58 | if(r < 4) { |
| 59 | sprintf(ERROR, "status malformed (%d bytes)", r); |
| 60 | usb_close(usb); |
| 61 | return -1; |
| 62 | } |
| 63 | |
| 64 | if(!memcmp(status, "INFO", 4)) { |
| 65 | fprintf(stderr,"%s\n", status); |
| 66 | continue; |
| 67 | } |
| 68 | |
| 69 | if(!memcmp(status, "OKAY", 4)) { |
| 70 | if(response) { |
| 71 | strcpy(response, (char*) status + 4); |
| 72 | } |
| 73 | return 0; |
| 74 | } |
| 75 | |
| 76 | if(!memcmp(status, "FAIL", 4)) { |
| 77 | if(r > 4) { |
| 78 | sprintf(ERROR, "remote: %s", status + 4); |
| 79 | } else { |
| 80 | strcpy(ERROR, "remote failure"); |
| 81 | } |
| 82 | return -1; |
| 83 | } |
| 84 | |
| 85 | if(!memcmp(status, "DATA", 4) && data_okay){ |
| 86 | unsigned dsize = strtoul((char*) status + 4, 0, 16); |
| 87 | if(dsize > size) { |
| 88 | strcpy(ERROR, "data size too large"); |
| 89 | usb_close(usb); |
| 90 | return -1; |
| 91 | } |
| 92 | return dsize; |
| 93 | } |
| 94 | |
| 95 | strcpy(ERROR,"unknown status code"); |
| 96 | usb_close(usb); |
| 97 | break; |
| 98 | } |
| 99 | |
| 100 | return -1; |
| 101 | } |
| 102 | |
| 103 | static int _command_send(usb_handle *usb, const char *cmd, |
| 104 | const void *data, unsigned size, |
| 105 | char *response) |
| 106 | { |
| 107 | int cmdsize = strlen(cmd); |
| 108 | int r; |
| 109 | |
| 110 | if(response) { |
| 111 | response[0] = 0; |
| 112 | } |
| 113 | |
| 114 | if(cmdsize > 64) { |
| 115 | sprintf(ERROR,"command too large"); |
| 116 | return -1; |
| 117 | } |
| 118 | |
| 119 | if(usb_write(usb, cmd, cmdsize) != cmdsize) { |
| 120 | sprintf(ERROR,"command write failed (%s)", strerror(errno)); |
| 121 | usb_close(usb); |
| 122 | return -1; |
| 123 | } |
| 124 | |
| 125 | if(data == 0) { |
| 126 | return check_response(usb, size, 0, response); |
| 127 | } |
| 128 | |
| 129 | r = check_response(usb, size, 1, 0); |
| 130 | if(r < 0) { |
| 131 | return -1; |
| 132 | } |
| 133 | size = r; |
| 134 | |
| 135 | if(size) { |
| 136 | r = usb_write(usb, data, size); |
| 137 | if(r < 0) { |
| 138 | sprintf(ERROR, "data transfer failure (%s)", strerror(errno)); |
| 139 | usb_close(usb); |
| 140 | return -1; |
| 141 | } |
| 142 | if(r != ((int) size)) { |
| 143 | sprintf(ERROR, "data transfer failure (short transfer)"); |
| 144 | usb_close(usb); |
| 145 | return -1; |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | r = check_response(usb, 0, 0, 0); |
| 150 | if(r < 0) { |
| 151 | return -1; |
| 152 | } else { |
| 153 | return size; |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | int fb_command(usb_handle *usb, const char *cmd) |
| 158 | { |
| 159 | return _command_send(usb, cmd, 0, 0, 0); |
| 160 | } |
| 161 | |
| 162 | int fb_command_response(usb_handle *usb, const char *cmd, char *response) |
| 163 | { |
| 164 | return _command_send(usb, cmd, 0, 0, response); |
| 165 | } |
| 166 | |
| 167 | int fb_download_data(usb_handle *usb, const void *data, unsigned size) |
| 168 | { |
| 169 | char cmd[64]; |
| 170 | int r; |
| 171 | |
| 172 | sprintf(cmd, "download:%08x", size); |
| 173 | r = _command_send(usb, cmd, data, size, 0); |
| 174 | |
| 175 | if(r < 0) { |
| 176 | return -1; |
| 177 | } else { |
| 178 | return 0; |
| 179 | } |
| 180 | } |
| 181 | |