summaryrefslogtreecommitdiffstats
path: root/apps/plugins/iriver_flash.c
blob: 562a680a60c6e7eb31d8df90ab0068b2cc9054c4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * !!! DON'T MESS WITH THIS CODE UNLESS YOU'RE ABSOLUTELY SURE WHAT YOU DO !!!
 * 
 * Copyright (C) 2006 by Miika Pekkarinen
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/
#include "plugin.h"

/* All CFI flash routines are copied and ported from firmware_flash.c */

unsigned char *audiobuf;
ssize_t audiobuf_size;

#ifndef IRIVER_H100_SERIES
#error this platform is not (yet) flashable
#endif

#if CONFIG_KEYPAD == IRIVER_H100_PAD
#define KEY1 BUTTON_OFF
#define KEY2 BUTTON_ON
#define KEY3 BUTTON_SELECT
#define KEYNAME1 "[Stop]"
#define KEYNAME2 "[On]"
#define KEYNAME3 "[Select]"
#endif

struct flash_info
{
    uint8_t manufacturer;
    uint8_t id;
    int size;
    char name[32];
};

#ifdef IRIVER_H100_SERIES
#define SEC_SIZE 4096
#define BOOTLOADER_ERASEGUARD  (BOOTLOADER_ENTRYPOINT / SEC_SIZE)
enum sections {
    SECT_RAMIMAGE = 1,
    SECT_ROMIMAGE = 2,
};

static volatile uint16_t* FB = (uint16_t*)0x00000000; /* Flash base address */
#endif

/* read the manufacturer and device ID */
bool cfi_read_id(volatile uint16_t* pBase, uint8_t* pManufacturerID, uint8_t* pDeviceID)
{
    uint8_t not_manu, not_id; /* read values before switching to ID mode */
    uint8_t manu, id; /* read values when in ID mode */
    
    pBase = (uint16_t*)((uint32_t)pBase & 0xFFF80000); /* down to 512k align */
    
    /* read the normal content */
    not_manu = pBase[0]; /* should be 'A' (0x41) and 'R' (0x52) */
    not_id   = pBase[1]; /*  from the "ARCH" marker */
    
    pBase[0x5555] = 0xAA; /* enter command mode */
    pBase[0x2AAA] = 0x55;
    pBase[0x5555] = 0x90; /* ID command */
    rb->sleep(HZ/50); /* Atmel wants 20ms pause here */
    
    manu = pBase[0];
    id   = pBase[1];
    
    pBase[0] = 0xF0; /* reset flash (back to normal read mode) */
    rb->sleep(HZ/50); /* Atmel wants 20ms pause here */
    
    /* I assume success if the obtained values are different from
    the normal flash content. This is not perfectly bulletproof, they 
    could theoretically be the same by chance, causing us to fail. */
    if (not_manu != manu || not_id != id) /* a value has changed */
    {
        *pManufacturerID = manu; /* return the results */
        *pDeviceID = id;
        return true; /* success */
    }
    return false; /* fail */
}


/* erase the sector which contains the given address */
bool cfi_erase_sector(volatile uint16_t* pAddr)
{
    unsigned timeout = 430000; /* the timeout loop should be no less than 25ms */
    
    FB[0x5555] = 0xAA; /* enter command mode */
    FB[0x2AAA] = 0x55;
    FB[0x5555] = 0x80; /* erase command */
    FB[0x5555] = 0xAA; /* enter command mode */
    FB[0x2AAA] = 0x55;
    *pAddr = 0x30; /* erase the sector */

    /* I counted 7 instructions for this loop -> min. 0.58 us per round */
    /* Plus memory waitstates it will be much more, gives margin */
    while (*pAddr != 0xFFFF && --timeout); /* poll for erased */

    return (timeout != 0);
}


/* address must be in an erased location */
static inline bool cfi_program_word(volatile uint16_t* pAddr, uint16_t data)
{
    unsigned timeout = 85; /* the timeout loop should be no less than 20us */
    
    if (~*pAddr & data) /* just a safety feature, not really necessary */
        return false; /* can't set any bit from 0 to 1 */
    
    FB[0x5555] = 0xAA; /* enter command mode */
    FB[0x2AAA] = 0x55;
    FB[0x5555] = 0xA0; /* byte program command */
    
    *pAddr = data;
    
    /* I counted 7 instructions for this loop -> min. 0.58 us per round */
    /* Plus memory waitstates it will be much more, gives margin */
    while (*pAddr != data && --timeout); /* poll for programmed */
    
    return (timeout != 0);
}


/* this returns true if supported and fills the info struct */
bool cfi_get_flash_info(struct flash_info* pInfo)
{
    rb->memset(pInfo, 0, sizeof(struct flash_info));
    
    if (!cfi_read_id(FB, &pInfo->manufacturer, &pInfo->id))
        return false;
    
    if (pInfo->manufacturer == 0xBF) /* SST */
    {
        if (pInfo->id == 0xD6)
        {
            pInfo->size = 256* 1024; /* 256k */
            rb->strcpy(pInfo->name, "SST39VF020");
            return true;
        }
        else if (pInfo->id == 0xD7)
        {
            pInfo->size = 512* 1024; /* 512k */
            rb->strcpy(pInfo->name, "SST39VF040");
            return true;
        }
        else if (pInfo->id == 0x82)
        {
            pInfo->size = 2048* 1024; /* 2 MiB */
            rb->strcpy(pInfo->name, "SST39VF160");
            return true;
        }
        else
            return false;
    }
    return false;
}

/***************** User Interface Functions *****************/
int wait_for_button(void)
{
    int button;
    
    do
    {
        button = rb->button_get(true);
    } while (IS_SYSEVENT(button) || (button & BUTTON_REL));
    
    return button;
}

/* helper for DoUserDialog() */
void ShowFlashInfo(struct flash_info* pInfo)
{
    if (!pInfo->manufacturer)
    {
        rb->lcd_puts(0, 0, "Flash: M=?? D=??");
        rb->lcd_puts(0, 1, "Impossible to program");
    }
    else
    {
        rb->lcd_putsf(0, 0, "Flash: M=%02x D=%02x",
            pInfo->manufacturer, pInfo->id);
        
        
        if (pInfo->size)
        {
            rb->lcd_puts(0, 1, pInfo->name);
            rb->lcd_putsf(0, 2, "Size: %d KB", pInfo->size / 1024);
        }
        else
        {
            rb->lcd_puts(0, 1, "Unsupported chip");
        }
        
    }
    
    rb->lcd_update();
}

bool show_info(void)
{
    struct flash_info fi;
    
    rb->lcd_clear_display();
    cfi_get_flash_info(&fi);
    ShowFlashInfo(&fi);
    if (fi.size == 0) /* no valid chip */
    {
        rb->splash(HZ*3, "Sorry!");
        return false; /* exit */
    }
    
    return true;
}

bool confirm(const char *msg)
{
    bool ret;
    
    rb->splashf(0, "%s ([PLAY] to CONFIRM)", msg);
    
    ret = (wait_for_button() == BUTTON_ON);
    show_info();
    
    return ret;
}

int load_firmware_file(const char *filename, uint32_t *checksum)
{
    int fd;
    int len, rc;
    int i;
    uint32_t sum;
    
    fd = rb->open(filename,  O_RDONLY);
    if (fd < 0)
        return -1;
    
    len = rb->filesize(fd);
    
    if (audiobuf_size < len)
    {
        rb->splash(HZ*3, "Aborting: Out of memory!");
        rb->close(fd);
        return -2;
    }
    
    rb->read(fd, checksum, 4);
    rb->lseek(fd, FIRMWARE_OFFSET_FILE_DATA, SEEK_SET);
    len -= FIRMWARE_OFFSET_FILE_DATA;
    
    rc = rb->read(fd, audiobuf, len);
    rb->close(fd);
    if (rc != len)
    {
        rb->splash(HZ*3, "Aborting: Read failure");
        return -3;
    }
    
    /* Verify the checksum */
    sum = MODEL_NUMBER;
    for (i = 0; i < len; i++)
        sum += audiobuf[i];
    
    if (sum != *checksum)
    {
        rb->splash(HZ*3, "Aborting: Checksums mismatch!");
        return -4;
    }
    
    return len;
}

unsigned long valid_bootloaders[][2] = { 
    /* Size-8   CRC32 */
#ifdef IRIVER_H120 /* Iriver H120/H140 checksums */
    { 63788, 0x08ff01a9 }, /* 7-pre3, improved failsafe functions */
    { 48764, 0xc674323e }, /* 7-pre4. Fixed audio thump & remote bootup */
    { 56896, 0x167f5d25 }, /* 7-pre5, various ATA fixes */
#endif
#ifdef IRIVER_H100
    { 48760, 0x2efc3323 }, /* 7-pre4 */
    { 56896, 0x0cd8dad4 }, /* 7-pre5 */
#endif
    { 0,     0 }
};


bool detect_valid_bootloader(const unsigned char *addr, int len)
{
    int i;
    unsigned long crc32;

    /* Try to scan through all valid bootloaders. */
    for (i = 0; valid_bootloaders[i][0]; i++)
    {
        if (len > 0 && len != (long)valid_bootloaders[i][0])
            continue;

        crc32 = rb->crc_32(addr, valid_bootloaders[i][0], 0xffffffff);
        if (crc32 == valid_bootloaders[i][1])
            return true;
    }

    return false;
}

static int get_section_address(int section)
{
    if (section == SECT_RAMIMAGE)
        return FLASH_RAMIMAGE_ENTRY;
    else if (section == SECT_ROMIMAGE)
        return FLASH_ROMIMAGE_ENTRY;
    else
        return -1;
}

int flash_rockbox(const char *filename, int section)
{
    struct flash_header hdr;
    int pos, i, len/*, rc */;
    unsigned long checksum, sum;
    unsigned char *p8;
    uint16_t *p16;
    
    if (get_section_address(section) < 0)
        return -1;
    
    p8 = (char *)BOOTLOADER_ENTRYPOINT;
    if (!detect_valid_bootloader(p8, 0))
    {
        rb->splash(HZ*3, "Incompatible bootloader");
        return -1;
    }

    if (!rb->detect_original_firmware())
    {
        if (!confirm("Update Rockbox flash image?"))
            return -2;
    }
    else
    {
        if (!confirm("Erase original firmware?"))
            return -3;
    }

    len = load_firmware_file(filename, &checksum);
    if (len <= 0)
        return len * 10;
    
    pos = get_section_address(section);
    
    /* Check if image relocation seems to be sane. */
    if (section == SECT_ROMIMAGE)
    {
        uint32_t *p32 = (uint32_t *)audiobuf;

        if (pos+sizeof(struct flash_header) != *p32)
        {
            rb->splashf(HZ*10, "Incorrect relocation: 0x%08lx/0x%08lx",
                         *p32, pos+sizeof(struct flash_header));
            return -1;
        }
        
    }
    
    /* Erase the program flash. */
    for (i = 0; i + pos < BOOTLOADER_ENTRYPOINT && i < len + 32; i += SEC_SIZE)
    {
        /* Additional safety check. */
        if (i + pos < SEC_SIZE)
            return -1;
        
        rb->lcd_putsf(0, 3, "Erasing...  %d%%", (i+SEC_SIZE)*100/len);
        rb->lcd_update();
        
        /*rc = */cfi_erase_sector(FB + (i + pos)/2);
    }
    
    /* Write the magic and size. */
    rb->memset(&hdr, 0, sizeof(struct flash_header));
    hdr.magic = FLASH_MAGIC;
    hdr.length = len;
    // rb->strncpy(hdr.version, rb->rbversion , sizeof(hdr.version)-1);
    p16 = (uint16_t *)&hdr;
    
    rb->lcd_puts(0, 4, "Programming...");
    rb->lcd_update();
    
    pos = get_section_address(section)/2;
    for (i = 0; i < (long)sizeof(struct flash_header)/2; i++)
    {
        cfi_program_word(FB + pos, p16[i]);
        pos++;
    }
    
    p16 = (uint16_t *)audiobuf;
    for (i = 0; i < len/2 && pos + i < (BOOTLOADER_ENTRYPOINT/2); i++)
    {
        if (i % SEC_SIZE == 0)
        {
            rb->lcd_putsf(0, 4, "Programming...  %d%%", (i+1)*100/(len/2));
            rb->lcd_update();
        }
        
        cfi_program_word(FB + pos + i, p16[i]);
    }
    
    /* Verify */
    rb->lcd_puts(0, 5, "Verifying");
    rb->lcd_update();
    
    p8 = (char *)get_section_address(section);
    p8 += sizeof(struct flash_header);
    sum = MODEL_NUMBER;
    for (i = 0; i < len; i++)
        sum += p8[i];
    
    if (sum != checksum)
    {
        rb->splash(HZ*3, "Verify failed!");
        /* Erase the magic sector so bootloader does not try to load
         * rockbox from flash and crash. */
        if (section == SECT_RAMIMAGE)
            cfi_erase_sector(FB + FLASH_RAMIMAGE_ENTRY/2);
        else
            cfi_erase_sector(FB + FLASH_ROMIMAGE_ENTRY/2);
        return -5;
    }
    
    rb->splash(HZ*2, "Success");
    
    return 0;
}

void show_fatal_error(void)
{
    rb->splash(HZ*30, "Disable idle poweroff, connect AC power and DON'T TURN PLAYER OFF!!");
    rb->splash(HZ*30, "Contact Rockbox developers as soon as possible!");
    rb->splash(HZ*30, "Your device won't be bricked unless you turn off the power");
    rb->splash(HZ*30, "Don't use the device before further instructions from Rockbox developers");
}

int flash_bootloader(const char *filename)
{
    char *bootsector;
    int pos, i, len, rc;
    unsigned long checksum, sum;
    unsigned char *p8;
    uint16_t *p16;

    bootsector = audiobuf;
    audiobuf += SEC_SIZE;
    audiobuf_size -= SEC_SIZE;
    
    if (!confirm("Update bootloader?"))
        return -2;
    
    len = load_firmware_file(filename, &checksum);
    if (len <= 0)
        return len * 10;
    
    if (len > 0xFFFF)
    {
        rb->splash(HZ*3, "Too big bootloader");
        return -1;
    }
    
    /* Verify the crc32 checksum also. */
    if (!detect_valid_bootloader(audiobuf, len))
    {
        rb->splash(HZ*3, "Incompatible/Untested bootloader");
        return -1;
    }

    rb->lcd_puts(0, 3, "Flashing...");
    rb->lcd_update();

    /* Backup the bootloader sector first. */
    p8 = (char *)FB;
    rb->memcpy(bootsector, p8, SEC_SIZE);
    
    /* Erase the boot sector and write a proper reset vector. */
    cfi_erase_sector(FB);
    p16 = (uint16_t *)audiobuf;
    for (i = 0; i < 8/2; i++)
        cfi_program_word(FB + i, p16[i]);
    
    /* And restore original content for original FW to function. */
    p16 = (uint16_t *)bootsector;
    for (i = 8/2; i < SEC_SIZE/2; i++)
        cfi_program_word(FB + i, p16[i]);
    
    /* Erase the bootloader flash section. */
    for (i = BOOTLOADER_ENTRYPOINT/SEC_SIZE; i < 0x200; i++)
        rc = cfi_erase_sector(FB + (SEC_SIZE/2) * i);
    
    pos = BOOTLOADER_ENTRYPOINT/2;
    p16 = (uint16_t *)audiobuf;
    for (i = 0; i < len/2; i++)
        cfi_program_word(FB + pos + i, p16[i]);
    
    /* Verify */
    p8 = (char *)BOOTLOADER_ENTRYPOINT;
    sum = MODEL_NUMBER;
    for (i = 0; i < len; i++)
        sum += p8[i];
    
    if (sum != checksum)
    {
        rb->splash(HZ*3, "Verify failed!");
        show_fatal_error();
        return -5;
    }
    
    p8 = (char *)FB;
    for (i = 0; i < 8; i++)
    {
        if (p8[i] != audiobuf[i])
        {
            rb->splash(HZ*3, "Bootvector corrupt!");
            show_fatal_error();
            return -6;
        }
    }
    
    rb->splash(HZ*2, "Success");
    
    return 0;
}

int flash_original_fw(int len)
{
    unsigned char reset_vector[8];
    int pos, i, rc;
    unsigned char *p8;
    uint16_t *p16;
    
    rb->lcd_puts(0, 3, "Critical section...");
    rb->lcd_update();

    p8 = (char *)FB;
    rb->memcpy(reset_vector, p8, sizeof reset_vector);
    
    /* Erase the boot sector and write back the reset vector. */
    cfi_erase_sector(FB);
    p16 = (uint16_t *)reset_vector;
    for (i = 0; i < (long)sizeof(reset_vector)/2; i++)
        cfi_program_word(FB + i, p16[i]);
    
    rb->lcd_puts(0, 4, "Flashing orig. FW");
    rb->lcd_update();
    
    /* Erase the program flash. */
    for (i = 1; i < BOOTLOADER_ERASEGUARD && (i-1)*4096 < len; i++)
    {
        rc = cfi_erase_sector(FB + (SEC_SIZE/2) * i);
        rb->lcd_putsf(0, 5, "Erase: 0x%03x  (%d)", i, rc);
        rb->lcd_update();
    }
    
    rb->lcd_puts(0, 6, "Programming");
    rb->lcd_update();
    
    pos = 0x00000008/2;
    p16 = (uint16_t *)audiobuf;
    for (i = 0; i < len/2 && pos + i < (BOOTLOADER_ENTRYPOINT/2); i++)
        cfi_program_word(FB + pos + i, p16[i]);
    
    rb->lcd_puts(0, 7, "Verifying");
    rb->lcd_update();
    
    /* Verify reset vectors. */
    p8 = (char *)FB;
    for (i = 0; i < 8; i++)
    {
        if (p8[i] != reset_vector[i])
        {
            rb->splash(HZ*3, "Bootvector corrupt!");
            show_fatal_error();
            break;
        }
    }
    
    /* Verify */
    p8 = (char *)0x00000008;
    for (i = 0; i < len; i++)
    {
        if (p8[i] != audiobuf[i])
        {
            rb->splash(HZ*3, "Verify failed!");
            rb->splashf(HZ*10, "at: 0x%08x", i);
            return -5;
        }
    }
    
    rb->splash(HZ*2, "Success");
    
    return 0;
}

int load_original_bin(const char *filename)
{
    unsigned long magic[2];
    int len, rc;
    int fd;
    
    if (!confirm("Restore original firmware (bootloader will be kept)?"))
        return -2;
    
    fd = rb->open(filename, O_RDONLY);
    if (fd < 0)
        return -1;
    
    len = rb->filesize(fd) - 0x228;
    rb->lseek(fd, 0x220, SEEK_SET);
    rb->read(fd, magic, 8);
    if (magic[1] != 0x00000008 || len <= 0 || len > audiobuf_size)
    {
        rb->splash(HZ*2, "Not an original firmware file");
        rb->close(fd);
        return -1;
    }
    
    rc = rb->read(fd, audiobuf, len);
    rb->close(fd);
    
    if (rc != len)
    {
        rb->splash(HZ*2, "Read error");
        return -2;
    }
    
    if (len % 2)
        len++;
    
    return flash_original_fw(len);
}

int load_romdump(const char *filename)
{
    int len, rc;
    int fd;
    
    if (!confirm("Restore firmware section (bootloader will be kept)?"))
        return -2;
    
    fd = rb->open(filename, O_RDONLY);
    if (fd < 0)
        return -1;
    
    len = rb->filesize(fd) - 8;
    if (len <= 0)
        return -1;
    
    rb->lseek(fd, 8, SEEK_SET);
    rc = rb->read(fd, audiobuf, len);
    rb->close(fd);
    
    if (rc != len)
    {
        rb->splash(HZ*2, "Read error");
        return -2;
    }
    
    if (len % 2)
        len++;
    
    if (len > BOOTLOADER_ENTRYPOINT - 8)
        len = BOOTLOADER_ENTRYPOINT - 8;
    
    return flash_original_fw(len);
}

/* Kind of our main function, defines the application flow. */
void DoUserDialog(char* filename)
{
    /* this can only work if Rockbox runs in DRAM, not flash ROM */
    if ((uint16_t*)rb >= FB && (uint16_t*)rb < FB + 4096*1024) /* 4 MB max */
    {   /* we're running from flash */
        rb->splash(HZ*3, "Not from ROM");
        return; /* exit */
    }

    /* refuse to work if the power may fail meanwhile */
    if (!rb->battery_level_safe())
    {
        rb->splash(HZ*3, "Battery too low!");
        return; /* exit */
    }
    
    rb->lcd_setfont(FONT_SYSFIXED);
    if (!show_info())
        return ;

    if (filename == NULL)
    {
        rb->splash(HZ*3, "Please use this plugin with \"Open with...\"");
        return ;
    }
    
    audiobuf = rb->plugin_get_audio_buffer((size_t *)&audiobuf_size);
    
    if (rb->strcasestr(filename, "/rockbox.iriver"))
        flash_rockbox(filename, SECT_RAMIMAGE);
    else if (rb->strcasestr(filename, "/rombox.iriver"))
        flash_rockbox(filename, SECT_ROMIMAGE);
    else if (rb->strcasestr(filename, "/bootloader.iriver"))
        flash_bootloader(filename);
    else if (rb->strcasestr(filename, "/ihp_120.bin"))
        load_original_bin(filename);
    else if (rb->strcasestr(filename, "/internal_rom_000000-1FFFFF.bin"))
        load_romdump(filename);
    else
        rb->splash(HZ*3, "Unknown file type");
}


/***************** Plugin Entry Point *****************/

enum plugin_status plugin_start(const void* parameter)
{
    int oldmode;

    /* now go ahead and have fun! */
    oldmode = rb->system_memory_guard(MEMGUARD_NONE); /*disable memory guard */
    DoUserDialog((char*) parameter);
    rb->system_memory_guard(oldmode);              /* re-enable memory guard */

    return PLUGIN_OK;
}