rbutil/e200rpatcher/e200rpatcher.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2007 Dave Chapman
  11  *
  12  * USB code based on ifp-line - http://ifp-driver.sourceforge.net
  13  *
  14  * ifp-line is (C) Pavel Kriz, Jun Yamishiro and Joe Roback and
  15  * licensed under the GPL (v2)
  16  *
  17  *
  18  * All files in this archive are subject to the GNU General Public License.
  19  * See the file COPYING in the source tree root for full license agreement.
  20  *
  21  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  22  * KIND, either express or implied.
  23  *
  24  ****************************************************************************/
  25
  26
  27 #include <stdio.h>
  28 #include <inttypes.h>
  29 #include <usb.h>
  30 #include <string.h>
  31 #include "stdbool.h"
  32
  33 #include "bootimg.h"
  34
  35 #define VERSION "0.2"
  36
  37 /* USB IDs for Manufacturing Mode */
  38 #define E200R_VENDORID    0x0781
  39 #define E200R_PRODUCTID   0x0720
  40
  41 #define E200R_BULK_TO     1
  42 #define TOUT              5000
  43 #define MAX_TRANSFER      64       /* Number of bytes to send in one write */
  44
  45 #ifndef MAX
  46 #define MAX(a,b) (((a)>(b))?(a):(b))
  47 #endif
  48
  49 static void put_int32le(uint32_t x, char* p)
  50 {
  51     p[0] = x & 0xff;
  52     p[1] = (x >> 8) & 0xff;
  53     p[2] = (x >> 16) & 0xff;
  54     p[3] = (x >> 24) & 0xff;
  55 }
  56
  57 int upload_app(usb_dev_handle* dh)
  58 {
  59     char buf[4];
  60     int err;
  61     int tosend;
  62     char* p = (char*)bootimg;
  63     int bytesleft = LEN_bootimg;
  64
  65     /* Write the data length */
  66
  67     put_int32le(LEN_bootimg, buf);
  68
  69     err = usb_bulk_write(dh, E200R_BULK_TO, buf, 4, TOUT);
  70
  71     if (err < 0)
  72     {
  73         fprintf(stderr,"[ERR]  Error writing data length\n");
  74         fprintf(stderr,"[ERR]  Bulk write error (%d, %s)\n", err, strerror(-err));
  75         return -1;
  76     }
  77
  78     /* Now send the data, MAX_TRANSFER bytes at a time. */
  79
  80     while (bytesleft > 0)
  81     {
  82         tosend = MAX(MAX_TRANSFER, bytesleft);
  83
  84         err = usb_bulk_write(dh, E200R_BULK_TO, p, tosend, TOUT);
  85
  86         if (err < 0)
  87         {
  88             fprintf(stderr,"[ERR]  Error writing data\n");
  89             fprintf(stderr,"[ERR]  Bulk write error (%d, %s)\n", err, strerror(-err));
  90             return -1;
  91         }
  92
  93         p += tosend;
  94         bytesleft -= tosend;
  95     }
  96
  97     return 0;
  98 }
  99
 100
 101 /* The main function */
 102
 103 void do_patching(void)
 104 {
 105     struct usb_bus *busses;
 106     struct usb_bus *bus;
 107     struct usb_device *tmp_dev;
 108     struct usb_device *dev = NULL;
 109     usb_dev_handle *dh;
 110     int err;
 111
 112     fprintf(stderr,"[INFO] Searching for E200R\n");
 113
 114     usb_init();
 115
 116     if(usb_find_busses() < 0) {
 117         fprintf(stderr, "[ERR]  Could not find any USB busses.\n");
 118         return;
 119     }
 120
 121     if (usb_find_devices() < 0) {
 122         fprintf(stderr, "[ERR]  USB devices not found(nor hubs!).\n");
 123         return;
 124     }
 125
 126     /* C calling convention, it's not nice to use global stuff */
 127     busses = usb_get_busses();
 128
 129     for (bus = busses; bus; bus = bus->next) {
 130         for (tmp_dev = bus->devices; tmp_dev; tmp_dev = tmp_dev->next) {
 131             if (tmp_dev->descriptor.idVendor == E200R_VENDORID &&
 132                 tmp_dev->descriptor.idProduct == E200R_PRODUCTID ) {
 133
 134                 dev = tmp_dev;
 135                 goto found;
 136
 137             }
 138         }
 139     }
 140
 141     if (dev == NULL) {
 142         fprintf(stderr, "[ERR]  E200R device not found.\n");
 143         fprintf(stderr, "[ERR]  Ensure your E200R is in manufacturing mode and run e200rpatcher again.\n");
 144         return;
 145     }
 146
 147 found:
 148     if ( (dh = usb_open(dev)) == NULL) {
 149         fprintf(stderr,"[ERR]  Unable to open E200R device.\n");
 150         return;
 151     }
 152
 153     err = usb_set_configuration(dh, 1);
 154
 155     if (err < 0)  {
 156         fprintf(stderr, "[ERR]  usb_set_configuration failed (%d)\n", err);
 157         usb_close(dh);
 158         return;
 159     }
 160
 161     /* "must be called" written in the libusb documentation */
 162     err = usb_claim_interface(dh, dev->config->interface->altsetting->bInterfaceNumber);
 163     if (err < 0) {
 164         fprintf(stderr, "[ERR]  Unable to claim interface (%d)\n", err);
 165         usb_close(dh);
 166         return;
 167     }
 168
 169     fprintf(stderr,"[INFO] Found E200R, uploading patching application.\n");
 170
 171     /* Now we can transfer the application to the device. */
 172
 173     if (upload_app(dh) < 0)
 174     {
 175         fprintf(stderr,"[ERR]  Upload of application failed.\n");
 176     }
 177     else
 178     {
 179         fprintf(stderr,"[INFO] Patching application uploaded successfully!\n");
 180     }
 181
 182     /* release claimed interface */
 183     usb_release_interface(dh, dev->config->interface->altsetting->bInterfaceNumber);
 184
 185     usb_close(dh);
 186 }
 187 void print_usage(void)
 188 {
 189     fprintf(stderr,"Usage: e200rpatcher [options]\n");
 190     fprintf(stderr,"Options:\n");
 191     fprintf(stderr,"  -s,  --silent\t\tDont display instructions\n");
 192 }
 193
 194 int main(int argc, char* argv[])
 195 {
 196     char input[4];
 197     int silent = 0;
 198     int i;
 199
 200     /* check args */
 201     if ((argc > 1) && ((strcmp(argv[1],"-h")==0) || (strcmp(argv[1],"--help")==0))) {
 202         print_usage();
 203         return 1;
 204     }
 205     for (i=1;i<argc;i++)
 206     {
 207         if (!strcmp(argv[i], "--silent") || !strcmp(argv[i], "-s"))
 208             silent = 1;
 209     }
 210
 211     printf("e200rpatcher v" VERSION " - (C) 2007 Jonathan Gordon & Dave Chapman\n");
 212     printf("This is free software; see the source for copying conditions.  There is NO\n");
 213     printf("warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n");
 214
 215     if (!silent)
 216     {
 217         printf("Attach your E200R in \"manufacturing mode\" as follows:\n");
 218         printf("   1) Power-off your E200R\n");
 219         printf("   2) Turn ON the lock/hold switch\n");
 220         printf("   3) Press and hold the SELECT button and whilst it is held down,\n");
 221         printf("      attach your E200R to your computer via USB\n");
 222         printf("   4) After attaching to USB, keep the SELECT button held for 10 seconds.\n");
 223         printf("\n");
 224         printf("NOTE: If your E200R starts in the normal Sansa firmware, you have\n");
 225         printf("      failed to enter manufacturing mode and should try again at step 1).\n\n");
 226
 227         printf("[INFO] Press Enter to continue:");
 228         fgets(input, 4, stdin);
 229     }
 230     do_patching();
 231
 232     if (!silent)
 233     {
 234         printf("[INFO] Press ENTER to exit: ");
 235         fgets(input, 4, stdin);
 236     }
 237
 238     return 0;
 239 }