bootloader/main-pp.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2006 by Barry Wardell
  11  *
  12  * Based on Rockbox iriver bootloader by Linus Nielsen Feltzing
  13  * and the ipodlinux bootloader by Daniel Palffy and Bernard Leach
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * as published by the Free Software Foundation; either version 2
  18  * of the License, or (at your option) any later version.
  19  *
  20  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  21  * KIND, either express or implied.
  22  *
  23  ****************************************************************************/
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26
  27 #include "config.h"
  28 #include "common.h"
  29 #include "cpu.h"
  30 #include "file.h"
  31 #include "system.h"
  32 #include "kernel.h"
  33 #include "lcd.h"
  34 #include "font.h"
  35 #include "storage.h"
  36 #include "adc.h"
  37 #include "button.h"
  38 #include "disk.h"
  39 #include "crc32-mi4.h"
  40 #include <string.h>
  41 #include "power.h"
  42 #include "version.h"
  43 #if defined(SANSA_E200) || defined(PHILIPS_SA9200)
  44 #include "i2c.h"
  45 #include "backlight-target.h"
  46 #endif
  47 #include "usb.h"
  48 #if defined(SANSA_E200) || defined(SANSA_C200) || defined(PHILIPS_SA9200)
  49 #include "usb_drv.h"
  50 #endif
  51 #include "usb-target.h"
  52 #if defined(SAMSUNG_YH925)
  53 /* this function (in lcd-yh925.c) resets the screen orientation for the OF
  54  * for use with dualbooting */
  55 void lcd_reset(void);
  56 #endif
  57
  58 /* Show the Rockbox logo - in show_logo.c */
  59 extern int show_logo(void);
  60
  61 /* Button definitions */
  62 #if CONFIG_KEYPAD == IRIVER_H10_PAD
  63 #define BOOTLOADER_BOOT_OF      BUTTON_LEFT
  64
  65 #elif CONFIG_KEYPAD == SANSA_E200_PAD
  66 #define BOOTLOADER_BOOT_OF      BUTTON_LEFT
  67
  68 #elif CONFIG_KEYPAD == SANSA_C200_PAD
  69 #define BOOTLOADER_BOOT_OF      BUTTON_LEFT
  70
  71 #elif CONFIG_KEYPAD == MROBE100_PAD
  72 #define BOOTLOADER_BOOT_OF      BUTTON_POWER
  73
  74 #elif CONFIG_KEYPAD == PHILIPS_SA9200_PAD
  75 #define BOOTLOADER_BOOT_OF      BUTTON_VOL_UP
  76
  77 #elif CONFIG_KEYPAD == PHILIPS_HDD1630_PAD
  78 #define BOOTLOADER_BOOT_OF      BUTTON_MENU
  79
  80 #elif CONFIG_KEYPAD == PHILIPS_HDD6330_PAD
  81 #define BOOTLOADER_BOOT_OF      BUTTON_VOL_UP
  82
  83 #elif CONFIG_KEYPAD == SAMSUNG_YH_PAD
  84 #define BOOTLOADER_BOOT_OF      BUTTON_LEFT
  85
  86 #elif CONFIG_KEYPAD == SANSA_FUZE_PAD
  87 #define BOOTLOADER_BOOT_OF      BUTTON_LEFT
  88
  89 #elif CONFIG_KEYPAD == PBELL_VIBE500_PAD
  90 #define BOOTLOADER_BOOT_OF      BUTTON_OK
  91
  92 #endif
  93
  94 /* Maximum allowed firmware image size. 10MB is more than enough */
  95 #define MAX_LOADSIZE (10*1024*1024)
  96
  97 /* A buffer to load the original firmware or Rockbox into */
  98 unsigned char *loadbuffer = (unsigned char *)DRAM_START;
  99
 100 /* Locations and sizes in hidden partition on Sansa */
 101 #if (CONFIG_STORAGE & STORAGE_SD)
 102 #define PPMI_SECTOR_OFFSET  1024
 103 #define PPMI_SECTORS        1
 104 #define MI4_HEADER_SECTORS  1
 105 #define NUM_PARTITIONS      2
 106
 107 #else
 108 #define NUM_PARTITIONS      1
 109
 110 #endif
 111
 112 #define MI4_HEADER_SIZE     0x200
 113
 114 /* mi4 header structure */
 115 struct mi4header_t {
 116     unsigned char magic[4];
 117     uint32_t version;
 118     uint32_t length;
 119     uint32_t crc32;
 120     uint32_t enctype;
 121     uint32_t mi4size;
 122     uint32_t plaintext;
 123     uint32_t dsa_key[10];
 124     uint32_t pad[109];
 125     unsigned char type[4];
 126     unsigned char model[4];
 127 };
 128
 129 /* PPMI header structure */
 130 struct ppmi_header_t {
 131     unsigned char magic[4];
 132     uint32_t length;
 133     uint32_t pad[126];
 134 };
 135
 136 inline unsigned int le2int(unsigned char* buf)
 137 {
 138    int32_t res = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0];
 139
 140    return res;
 141 }
 142
 143 inline void int2le(unsigned int val, unsigned char* addr)
 144 {
 145     addr[0] = val & 0xFF;
 146     addr[1] = (val >> 8) & 0xff;
 147     addr[2] = (val >> 16) & 0xff;
 148     addr[3] = (val >> 24) & 0xff;
 149 }
 150
 151 struct tea_key {
 152   const char * name;
 153   uint32_t     key[4];
 154 };
 155
 156 #define NUM_KEYS (sizeof(tea_keytable)/sizeof(tea_keytable[0]))
 157 struct tea_key tea_keytable[] = {
 158   { "default" ,          { 0x20d36cc0, 0x10e8c07d, 0xc0e7dcaa, 0x107eb080 } },
 159   { "sansa",             { 0xe494e96e, 0x3ee32966, 0x6f48512b, 0xa93fbb42 } },
 160   { "sansa_gh",          { 0xd7b10538, 0xc662945b, 0x1b3fce68, 0xf389c0e6 } },
 161   { "sansa_103",         { 0x1d29ddc0, 0x2579c2cd, 0xce339e1a, 0x75465dfe } },
 162   { "rhapsody",          { 0x7aa9c8dc, 0xbed0a82a, 0x16204cc7, 0x5904ef38 } },
 163   { "p610",              { 0x950e83dc, 0xec4907f9, 0x023734b9, 0x10cfb7c7 } },
 164   { "p640",              { 0x220c5f23, 0xd04df68e, 0x431b5e25, 0x4dcc1fa1 } },
 165   { "virgin",            { 0xe83c29a1, 0x04862973, 0xa9b3f0d4, 0x38be2a9c } },
 166   { "20gc_eng",          { 0x0240772c, 0x6f3329b5, 0x3ec9a6c5, 0xb0c9e493 } },
 167   { "20gc_fre",          { 0xbede8817, 0xb23bfe4f, 0x80aa682d, 0xd13f598c } },
 168   { "elio_p722",         { 0x6af3b9f8, 0x777483f5, 0xae8181cc, 0xfa6d8a84 } },
 169   { "c200",              { 0xbf2d06fa, 0xf0e23d59, 0x29738132, 0xe2d04ca7 } },
 170   { "c200_103",          { 0x2a7968de, 0x15127979, 0x142e60a7, 0xe49c1893 } },
 171   { "c200_106",          { 0xa913d139, 0xf842f398, 0x3e03f1a6, 0x060ee012 } },
 172   { "view",              { 0x70e19bda, 0x0c69ea7d, 0x2b8b1ad1, 0xe9767ced } },
 173   { "sa9200",            { 0x33ea0236, 0x9247bdc5, 0xdfaedf9f, 0xd67c9d30 } },
 174   { "hdd1630",           { 0x04543ced, 0xcebfdbad, 0xf7477872, 0x0d12342e } },
 175   { "vibe500",           { 0xe3a66156, 0x77c6b67a, 0xe821dca5, 0xca8ca37c } },
 176 };
 177
 178 /*
 179
 180 tea_decrypt() from http://en.wikipedia.org/wiki/Tiny_Encryption_Algorithm
 181
 182 "Following is an adaptation of the reference encryption and decryption
 183 routines in C, released into the public domain by David Wheeler and
 184 Roger Needham:"
 185
 186 */
 187
 188 /* NOTE: The mi4 version of TEA uses a different initial value to sum compared
 189          to the reference implementation and the main loop is 8 iterations, not
 190          32.
 191 */
 192
 193 static void tea_decrypt(uint32_t* v0, uint32_t* v1, uint32_t* k) {
 194     uint32_t sum=0xF1BBCDC8, i;                    /* set up */
 195     uint32_t delta=0x9E3779B9;                     /* a key schedule constant */
 196     uint32_t k0=k[0], k1=k[1], k2=k[2], k3=k[3];   /* cache key */
 197     for(i=0; i<8; i++) {                               /* basic cycle start */
 198         *v1 -= ((*v0<<4) + k2) ^ (*v0 + sum) ^ ((*v0>>5) + k3);
 199         *v0 -= ((*v1<<4) + k0) ^ (*v1 + sum) ^ ((*v1>>5) + k1);
 200         sum -= delta;                                   /* end cycle */
 201     }
 202 }
 203
 204 /* mi4 files are encrypted in 64-bit blocks (two little-endian 32-bit
 205    integers) and the key is incremented after each block
 206  */
 207
 208 static void tea_decrypt_buf(unsigned char* src, unsigned char* dest, size_t n, uint32_t * key)
 209 {
 210     uint32_t v0, v1;
 211     unsigned int i;
 212
 213     for (i = 0; i < (n / 8); i++) {
 214         v0 = le2int(src);
 215         v1 = le2int(src+4);
 216
 217         tea_decrypt(&v0, &v1, key);
 218
 219         int2le(v0, dest);
 220         int2le(v1, dest+4);
 221
 222         src += 8;
 223         dest += 8;
 224
 225         /* Now increment the key */
 226         key[0]++;
 227         if (key[0]==0) {
 228             key[1]++;
 229             if (key[1]==0) {
 230                 key[2]++;
 231                 if (key[2]==0) {
 232                     key[3]++;
 233                 }
 234             }
 235         }
 236     }
 237 }
 238
 239 static inline bool tea_test_key(unsigned char magic_enc[8], uint32_t * key, int unaligned)
 240 {
 241     unsigned char magic_dec[8];
 242     tea_decrypt_buf(magic_enc, magic_dec, 8, key);
 243
 244     return (le2int(&magic_dec[4*unaligned]) == 0xaa55aa55);
 245 }
 246
 247 static int tea_find_key(struct mi4header_t *mi4header, int fd)
 248 {
 249     unsigned int i;
 250     int rc;
 251     unsigned int j;
 252     uint32_t key[4];
 253     unsigned char magic_enc[8];
 254     int key_found = -1;
 255     unsigned int magic_location = mi4header->length-4;
 256     int unaligned = 0;
 257
 258     if ( (magic_location % 8) != 0 )
 259     {
 260         unaligned = 1;
 261         magic_location -= 4;
 262     }
 263
 264     /* Load encrypted magic 0xaa55aa55 to check key */
 265     lseek(fd, MI4_HEADER_SIZE + magic_location, SEEK_SET);
 266     rc = read(fd, magic_enc, 8);
 267     if(rc < 8 )
 268         return EREAD_IMAGE_FAILED;
 269
 270     printf("Searching for key:");
 271
 272     for (i=0; i < NUM_KEYS && (key_found<0) ; i++) {
 273         key[0] = tea_keytable[i].key[0];
 274         key[1] = tea_keytable[i].key[1];
 275         key[2] = tea_keytable[i].key[2];
 276         key[3] = tea_keytable[i].key[3];
 277
 278         /* Now increment the key */
 279         for(j=0; j<((magic_location-mi4header->plaintext)/8); j++){
 280             key[0]++;
 281             if (key[0]==0) {
 282                 key[1]++;
 283                 if (key[1]==0) {
 284                     key[2]++;
 285                     if (key[2]==0) {
 286                         key[3]++;
 287                     }
 288                 }
 289             }
 290         }
 291
 292         if (tea_test_key(magic_enc,key,unaligned))
 293         {
 294             key_found = i;
 295             printf("%s...found", tea_keytable[i].name);
 296         } else {
 297            /* printf("%s...failed", tea_keytable[i].name); */
 298         }
 299     }
 300
 301     return key_found;
 302 }
 303
 304
 305 /* Load mi4 format firmware image */
 306 int load_mi4(unsigned char* buf, char* firmware, unsigned int buffer_size)
 307 {
 308     int fd;
 309     struct mi4header_t mi4header;
 310     int rc;
 311     unsigned long sum;
 312     char filename[MAX_PATH];
 313
 314     snprintf(filename,sizeof(filename), BOOTDIR "/%s",firmware);
 315     fd = open(filename, O_RDONLY);
 316     if(fd < 0)
 317     {
 318         snprintf(filename,sizeof(filename),"/%s",firmware);
 319         fd = open(filename, O_RDONLY);
 320         if(fd < 0)
 321             return EFILE_NOT_FOUND;
 322     }
 323
 324     read(fd, &mi4header, MI4_HEADER_SIZE);
 325
 326     /* MI4 file size */
 327     printf("mi4 size: %x", mi4header.mi4size);
 328
 329     if ((mi4header.mi4size-MI4_HEADER_SIZE) > buffer_size)
 330         return EFILE_TOO_BIG;
 331
 332     /* CRC32 */
 333     printf("CRC32: %x", mi4header.crc32);
 334
 335     /* Rockbox model id */
 336     printf("Model id: %.4s", mi4header.model);
 337
 338     /* Read binary type (RBOS, RBBL) */
 339     printf("Binary type: %.4s", mi4header.type);
 340
 341     /* Load firmware file */
 342     lseek(fd, MI4_HEADER_SIZE, SEEK_SET);
 343     rc = read(fd, buf, mi4header.mi4size-MI4_HEADER_SIZE);
 344     if(rc < (int)mi4header.mi4size-MI4_HEADER_SIZE)
 345         return EREAD_IMAGE_FAILED;
 346
 347     /* Check CRC32 to see if we have a valid file */
 348     sum = chksum_crc32 (buf, mi4header.mi4size - MI4_HEADER_SIZE);
 349
 350     printf("Calculated CRC32: %x", sum);
 351
 352     if(sum != mi4header.crc32)
 353         return EBAD_CHKSUM;
 354
 355     if( (mi4header.plaintext + MI4_HEADER_SIZE) != mi4header.mi4size)
 356     {
 357         /* Load encrypted firmware */
 358         int key_index = tea_find_key(&mi4header, fd);
 359
 360         if (key_index < 0)
 361             return EINVALID_FORMAT;
 362
 363         /* Plaintext part is already loaded */
 364         buf += mi4header.plaintext;
 365
 366         /* Decrypt in-place */
 367         tea_decrypt_buf(buf, buf,
 368                         mi4header.mi4size-(mi4header.plaintext+MI4_HEADER_SIZE),
 369                         tea_keytable[key_index].key);
 370
 371         printf("%s key used", tea_keytable[key_index].name);
 372
 373         /* Check decryption was successfull */
 374         if(le2int(&buf[mi4header.length-mi4header.plaintext-4]) != 0xaa55aa55)
 375         {
 376             return EREAD_IMAGE_FAILED;
 377         }
 378     }
 379
 380     return EOK;
 381 }
 382
 383 #if (CONFIG_STORAGE & STORAGE_SD)
 384 /* Load mi4 firmware from a hidden disk partition */
 385 int load_mi4_part(unsigned char* buf, struct partinfo* pinfo,
 386                   unsigned int buffer_size, bool disable_rebuild)
 387 {
 388     struct mi4header_t mi4header;
 389     struct ppmi_header_t ppmi_header;
 390     unsigned long sum;
 391
 392     /* Read header to find out how long the mi4 file is. */
 393     storage_read_sectors(pinfo->start + PPMI_SECTOR_OFFSET,
 394                          PPMI_SECTORS, &ppmi_header);
 395
 396     /* The first four characters at 0x80000 (sector 1024) should be PPMI*/
 397     if( memcmp(ppmi_header.magic, "PPMI", 4) )
 398         return EFILE_NOT_FOUND;
 399
 400     printf("BL mi4 size: %x", ppmi_header.length);
 401
 402     /* Read mi4 header of the OF */
 403     storage_read_sectors(pinfo->start + PPMI_SECTOR_OFFSET + PPMI_SECTORS
 404                        + (ppmi_header.length/512), MI4_HEADER_SECTORS, &mi4header);
 405
 406     /* We don't support encrypted mi4 files yet */
 407     if( (mi4header.plaintext) != (mi4header.mi4size-MI4_HEADER_SIZE))
 408         return EINVALID_FORMAT;
 409
 410     /* MI4 file size */
 411     printf("OF mi4 size: %x", mi4header.mi4size);
 412
 413     if ((mi4header.mi4size-MI4_HEADER_SIZE) > buffer_size)
 414         return EFILE_TOO_BIG;
 415
 416     /* CRC32 */
 417     printf("CRC32: %x", mi4header.crc32);
 418
 419     /* Rockbox model id */
 420     printf("Model id: %.4s", mi4header.model);
 421
 422     /* Read binary type (RBOS, RBBL) */
 423     printf("Binary type: %.4s", mi4header.type);
 424
 425     /* Load firmware */
 426     storage_read_sectors(pinfo->start + PPMI_SECTOR_OFFSET + PPMI_SECTORS
 427                         + (ppmi_header.length/512) + MI4_HEADER_SECTORS,
 428                         (mi4header.mi4size-MI4_HEADER_SIZE)/512, buf);
 429
 430     /* Check CRC32 to see if we have a valid file */
 431     sum = chksum_crc32 (buf,mi4header.mi4size-MI4_HEADER_SIZE);
 432
 433     printf("Calculated CRC32: %x", sum);
 434
 435     if(sum != mi4header.crc32)
 436         return EBAD_CHKSUM;
 437
 438 #ifdef SANSA_E200
 439     if (disable_rebuild)
 440     {
 441         char block[512];
 442
 443         printf("Disabling database rebuild");
 444
 445         storage_read_sectors(pinfo->start + 0x3c08, 1, block);
 446         block[0xe1] = 0;
 447         storage_write_sectors(pinfo->start + 0x3c08, 1, block);
 448     }
 449 #else
 450     (void) disable_rebuild;
 451 #endif
 452
 453     return EOK;
 454 }
 455 #endif /* (CONFIG_STORAGE & STORAGE_SD) */
 456
 457 #ifdef HAVE_BOOTLOADER_USB_MODE
 458 /* Return USB_HANDLED if session took place else return USB_EXTRACTED */
 459 static int handle_usb(int connect_timeout)
 460 {
 461     static struct event_queue q SHAREDBSS_ATTR;
 462     struct queue_event ev;
 463     int usb = USB_EXTRACTED;
 464     long end_tick = 0;
 465
 466     if (!usb_plugged())
 467         return USB_EXTRACTED;
 468
 469     queue_init(&q, true);
 470     usb_init();
 471     usb_start_monitoring();
 472
 473     printf("USB: Connecting");
 474
 475     if (connect_timeout != TIMEOUT_BLOCK)
 476         end_tick = current_tick + connect_timeout;
 477
 478     while (1)
 479     {
 480         /* Sleep no longer than 1/2s */
 481         queue_wait_w_tmo(&q, &ev, HZ/2);
 482
 483         if (ev.id == SYS_USB_CONNECTED)
 484         {
 485             /* Switch to verbose mode if not in it so that the status updates
 486              * are shown */
 487             verbose = true;
 488             /* Got the message - wait for disconnect */
 489             printf("Bootloader USB mode");
 490
 491             usb = USB_HANDLED;
 492             usb_acknowledge(SYS_USB_CONNECTED_ACK);
 493             usb_wait_for_disconnect(&q);
 494             break;
 495         }
 496
 497         if (connect_timeout != TIMEOUT_BLOCK &&
 498             TIME_AFTER(current_tick, end_tick))
 499         {
 500             /* Timed out waiting for the connect - will happen when connected
 501              * to a charger instead of a host port and the charging pin is
 502              * the same as the USB pin */
 503             printf("USB: Timed out");
 504             break;
 505         }
 506
 507         if (!usb_plugged())
 508             break; /* Cable pulled */
 509     }
 510
 511     usb_close();
 512     queue_delete(&q);
 513
 514     return usb;
 515 }
 516 #elif (defined(SANSA_E200) || defined(SANSA_C200) || defined(PHILIPS_SA9200) \
 517     || defined (SANSA_VIEW)) && !defined(USE_ROCKBOX_USB)
 518 /* Return USB_INSERTED if cable present */
 519 static int handle_usb(int connect_timeout)
 520 {
 521     int usb_retry = 0;
 522     int usb = USB_EXTRACTED;
 523
 524     usb_init();
 525     while (usb_drv_powered() && usb_retry < 5 && usb != USB_INSERTED)
 526     {
 527         usb_retry++;
 528         sleep(HZ/4);
 529         usb = usb_detect();
 530     }
 531
 532     if (usb != USB_INSERTED)
 533         usb = USB_EXTRACTED;
 534
 535     return usb;
 536     (void)connect_timeout;
 537 }
 538 #else
 539 /* Ignore cable state */
 540 static int handle_usb(int connect_timeout)
 541 {
 542     return USB_EXTRACTED;
 543     (void)connect_timeout;
 544 }
 545 #endif /* HAVE_BOOTLOADER_USB_MODE */
 546
 547 void* main(void)
 548 {
 549     int i;
 550     int btn;
 551     int rc;
 552     int num_partitions;
 553     struct partinfo* pinfo;
 554 #if !(CONFIG_STORAGE & STORAGE_SD)
 555     char buf[256];
 556     unsigned short* identify_info;
 557 #endif
 558     int usb = USB_EXTRACTED;
 559
 560     chksum_crc32gentab ();
 561
 562     system_init();
 563     kernel_init();
 564
 565 #ifdef HAVE_BOOTLOADER_USB_MODE
 566     /* loader must service interrupts */
 567     enable_interrupt(IRQ_FIQ_STATUS);
 568 #endif
 569
 570     lcd_init();
 571
 572     font_init();
 573     show_logo();
 574
 575     adc_init();
 576 #ifdef HAVE_BOOTLOADER_USB_MODE
 577     button_init_device();
 578 #else
 579     button_init();
 580 #endif
 581 #if defined(SANSA_E200) || defined(PHILIPS_SA9200)
 582     i2c_init();
 583     _backlight_on();
 584 #endif
 585
 586     if (button_hold())
 587     {
 588         verbose = true;
 589         lcd_clear_display();
 590         printf("Hold switch on");
 591         printf("Shutting down...");
 592         sleep(HZ);
 593         power_off();
 594     }
 595
 596     btn = button_read_device();
 597
 598     /* Enable bootloader messages if any button is pressed */
 599 #ifdef HAVE_BOOTLOADER_USB_MODE
 600     lcd_clear_display();
 601     if (btn)
 602         verbose = true;
 603 #else
 604     if (btn) {
 605         lcd_clear_display();
 606         verbose = true;
 607     }
 608 #endif
 609
 610     lcd_setfont(FONT_SYSFIXED);
 611
 612     printf("Rockbox boot loader");
 613     printf("Version: " RBVERSION);
 614     printf(MODEL_NAME);
 615
 616     i=storage_init();
 617 #if !(CONFIG_STORAGE & STORAGE_SD)
 618     if (i==0) {
 619         identify_info=ata_get_identify();
 620         /* Show model */
 621         for (i=0; i < 20; i++) {
 622             ((unsigned short*)buf)[i]=htobe16(identify_info[i+27]);
 623         }
 624         buf[40]=0;
 625         for (i=39; i && buf[i]==' '; i--) {
 626             buf[i]=0;
 627         }
 628         printf(buf);
 629     } else {
 630         error(EATA, i, true);
 631     }
 632 #endif
 633
 634     disk_init(IF_MV(0));
 635     num_partitions = disk_mount_all();
 636     if (num_partitions<=0)
 637     {
 638         error(EDISK,num_partitions, true);
 639     }
 640
 641     /* Just list the first 2 partitions since we don't have any devices yet
 642        that have more than that */
 643     for(i=0; i<NUM_PARTITIONS; i++)
 644     {
 645         pinfo = disk_partinfo(i);
 646         printf("Partition %d: 0x%02x %ld MB",
 647                 i, pinfo->type, pinfo->size / 2048);
 648     }
 649
 650     /* Now that storage is initialized, check for USB connection */
 651     if ((btn & BOOTLOADER_BOOT_OF) == 0)
 652     {
 653         usb_pin_init();
 654         usb = handle_usb(HZ*2);
 655         if (usb == USB_INSERTED)
 656             btn |= BOOTLOADER_BOOT_OF;
 657     }
 658
 659     /* Try loading Rockbox, if that fails, fall back to the OF */
 660     if((btn & BOOTLOADER_BOOT_OF) == 0)
 661     {
 662         printf("Loading Rockbox...");
 663         rc = load_mi4(loadbuffer, BOOTFILE, MAX_LOADSIZE);
 664         if (rc < EOK)
 665         {
 666             bool old_verbose = verbose;
 667             verbose = true;
 668             printf("Can't load " BOOTFILE ": ");
 669             printf(strerror(rc));
 670             verbose = old_verbose;
 671             btn |= BOOTLOADER_BOOT_OF;
 672             sleep(5*HZ);
 673         }
 674         else
 675             goto main_exit;
 676     }
 677
 678     if(btn & BOOTLOADER_BOOT_OF)
 679     {
 680         /* Load original mi4 firmware in to a memory buffer called loadbuffer.
 681            The rest of the loading is done in crt0.S.
 682            1) First try reading from the hidden partition (on Sansa only).
 683            2) Next try a decrypted mi4 file in /System/OF.mi4
 684            3) Finally, try a raw firmware binary in /System/OF.bin. It should be
 685               a mi4 firmware decrypted and header stripped using mi4code.
 686         */
 687         printf("Loading original firmware...");
 688
 689 #if (CONFIG_STORAGE & STORAGE_SD)
 690         /* First try a (hidden) firmware partition */
 691         printf("Trying firmware partition");
 692         pinfo = disk_partinfo(1);
 693         if(pinfo->type == PARTITION_TYPE_OS2_HIDDEN_C_DRIVE)
 694         {
 695             rc = load_mi4_part(loadbuffer, pinfo, MAX_LOADSIZE,
 696                                usb == USB_INSERTED);
 697             if (rc < EOK) {
 698                 printf("Can't load from partition");
 699                 printf(strerror(rc));
 700             } else {
 701                 goto main_exit;
 702             }
 703         } else {
 704             printf("No hidden partition found.");
 705         }
 706 #endif
 707
 708 #if defined(PHILIPS_HDD1630) || defined(PHILIPS_HDD6330) || defined(PHILIPS_SA9200)
 709         printf("Trying /System/OF.ebn");
 710         rc=load_mi4(loadbuffer, "/System/OF.ebn", MAX_LOADSIZE);
 711         if (rc < EOK) {
 712             printf("Can't load /System/OF.ebn");
 713             printf(strerror(rc));
 714         } else {
 715             goto main_exit;
 716         }
 717 #endif
 718
 719         printf("Trying /System/OF.mi4");
 720         rc=load_mi4(loadbuffer, "/System/OF.mi4", MAX_LOADSIZE);
 721         if (rc < EOK) {
 722             printf("Can't load /System/OF.mi4");
 723             printf(strerror(rc));
 724         } else {
 725 #if defined(SAMSUNG_YH925)
 726             lcd_reset();
 727 #endif
 728             goto main_exit;
 729         }
 730
 731         printf("Trying /System/OF.bin");
 732         rc=load_raw_firmware(loadbuffer, "/System/OF.bin", MAX_LOADSIZE);
 733         if (rc < EOK) {
 734             printf("Can't load /System/OF.bin");
 735             printf(strerror(rc));
 736         } else {
 737 #if defined(SAMSUNG_YH925)
 738             lcd_reset();
 739 #endif
 740             goto main_exit;
 741         }
 742
 743         error(0, 0, true);
 744     }
 745
 746 main_exit:
 747 #ifdef HAVE_BOOTLOADER_USB_MODE
 748     storage_close();
 749     system_prepare_fw_start();
 750 #endif
 751
 752     return (void*)loadbuffer;
 753 }