summaryrefslogtreecommitdiffstats
path: root/apps/plugins/rockbox_flash.c
blob: deccb47bb98ea46b9378ca2e556998b0a2b088a6 (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
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
/***************************************************************************
*             __________               __   ___.
*   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
*   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
*   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
*   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
*                     \/            \/     \/    \/            \/
* $Id$
*
* Plugin for reprogramming only the second image in Flash ROM.
* !!! DON'T MESS WITH THIS CODE UNLESS YOU'RE ABSOLUTELY SURE WHAT YOU DO !!!
*
* Copyright (C) 2003 Jrg Hohensohn aka [IDC]Dragon
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "plugin.h"

#if !defined(SIMULATOR) && (CONFIG_CPU == SH7034) /* Only for SH targets */

PLUGIN_HEADER

/* define DUMMY if you only want to "play" with the UI, does no harm */
/* #define DUMMY */

#define LATEST_BOOTLOADER_VERSION 1 /* update this with the bootloader */

#ifndef UINT8
#define UINT8 unsigned char
#endif

#ifndef UINT16
#define UINT16 unsigned short
#endif

#ifndef UINT32
#define UINT32 unsigned long
#endif

/* hard-coded values */
static volatile UINT8* FB = (UINT8*)0x02000000; /* Flash base address */
#define SECTORSIZE 4096 /* size of one flash sector */

#define ROCKBOX_DEST 0x09000000
#define ROCKBOX_EXEC 0x09000200
#define BOOT_VERS_ADR 0xFA /* position of bootloader version value in Flash */
#define FW_VERS_ADR 0xFE /* position of firmware version value in Flash */
#define UCL_HEADER 26 /* size of the header generated by uclpack */

#if CONFIG_KEYPAD == ONDIO_PAD /* limited keypad */
#define KEY1 BUTTON_LEFT
#define KEY2 BUTTON_UP
#define KEYNAME1 "Left"
#define KEYNAME2 "Up"
#else /* recorder keypad */
#define KEY1 BUTTON_F1
#define KEY2 BUTTON_F2
#define KEYNAME1 "F1"
#define KEYNAME2 "F2"
#endif

typedef struct 
{
    UINT32 destination; /* address to copy it to */
    UINT32 size;        /* how many bytes of payload (to the next header) */
    UINT32 execute;     /* entry point */
    UINT32 flags;       /* uncompressed or compressed */
    /* end of header, now comes the payload */
} tImageHeader;

/* result of the CheckFirmwareFile() function */
typedef enum
{
    eOK = 0,
    eFileNotFound, /* errors from here on */
    eTooBig,
    eTooSmall,
    eReadErr,
    eNotUCL,
    eWrongAlgorithm,
    eMultiBlocks,
    eBadRomLink
} tCheckResult;

typedef struct 
{
    UINT8 manufacturer;
    UINT8 id;
    int size;
    char name[32];
} tFlashInfo;

static struct plugin_api* rb; /* here is a global api struct pointer */

static UINT8* sector; /* better not place this on the stack... */

/***************** Flash Functions *****************/


/* read the manufacturer and device ID */
bool ReadID(volatile UINT8* pBase, UINT8* pManufacturerID, UINT8* pDeviceID)
{
    UINT8 not_manu, not_id; /* read values before switching to ID mode */
    UINT8 manu, id; /* read values when in ID mode */

    pBase = (UINT8*)((UINT32)pBase & 0xFFF80000); /* round down to 512k align,
                                                     to make sure */

    not_manu = pBase[0]; /* read the normal content */
    not_id   = pBase[1]; /* should be 'A' (0x41) and 'R' (0x52) 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 EraseSector(volatile UINT8* pAddr)
{
#ifdef DUMMY
    (void)pAddr; /* prevents warning */
    return true;
#else
    volatile UINT8* pBase =
        (UINT8*)((UINT32)pAddr & 0xFFF80000); /* round down to 512k align */
    unsigned timeout = 43000; /* the timeout loop should be no less than
                                 25ms */

    pBase[0x5555] = 0xAA; /* enter command mode */
    pBase[0x2AAA] = 0x55;
    pBase[0x5555] = 0x80; /* erase command */
    pBase[0x5555] = 0xAA; /* enter command mode */
    pBase[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 != 0xFF && --timeout); /* poll for erased */

    return (timeout != 0);
#endif
}

/* address must be in an erased location */
inline bool ProgramByte(volatile UINT8* pAddr, UINT8 data)
{
#ifdef DUMMY
    (void)pAddr; /* prevents warnings */
    (void)data;
    return true;
#else
    unsigned timeout = 35; /* 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);
#endif
}

/* this returns true if supported and fills the info struct */
bool GetFlashInfo(tFlashInfo* pInfo)
{
    rb->memset(pInfo, 0, sizeof(tFlashInfo));

    if (!ReadID(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
            return false;
    }
    return false;
}


/*********** Tool Functions ************/

/* place a 32 bit value into memory, big endian */
void Write32(UINT8* pByte, UINT32 value)
{
    pByte[0] = (UINT8)(value >> 24);    
    pByte[1] = (UINT8)(value >> 16);    
    pByte[2] = (UINT8)(value >> 8);    
    pByte[3] = (UINT8)(value);    
}

/* read a 32 bit value from memory, big endian */
UINT32 Read32(UINT8* pByte)
{
    UINT32 value;

    value = (UINT32)pByte[0] << 24;
    value |= (UINT32)pByte[1] << 16;
    value |= (UINT32)pByte[2] << 8;
    value |= (UINT32)pByte[3];

    return value;
}

/* get the start address of the second image */
tImageHeader* GetSecondImage(void)
{
    tImageHeader* pImage1;
    UINT32 pos = 0;    /* default: not found */
    UINT32* pFlash = (UINT32*)FB;

    /* determine the first image position */
    pos = pFlash[2] + pFlash[3]; /* position + size of the bootloader
                                    = after it */
    pos = (pos + 3) & ~3; /* be sure it's 32 bit aligned */
    pImage1 = (tImageHeader*)pos;

    if (pImage1->destination != ROCKBOX_DEST ||
        pImage1->execute != ROCKBOX_EXEC)
        return 0; /* seems to be no Archos/Rockbox image in here */

    if (pImage1->size != 0)
    {
        /* success, we have a second image */
        pos = (UINT32)pImage1 + sizeof(tImageHeader) + pImage1->size;
        if (((pos + SECTORSIZE-1) & ~(SECTORSIZE-1)) != pos)
        {    /* not sector-aligned */
            pos = 0; /* sanity check failed */
        }
    }

    return (tImageHeader*)pos;
}


/* Tool function to calculate a CRC32 across some buffer */
/* third argument is either 0xFFFFFFFF to start or value from last piece */
UINT32 crc_32(unsigned char* buf, unsigned len, unsigned crc32)
{
    /* CCITT standard polynomial 0x04C11DB7 */
    static const UINT32 crc32_lookup[16] = 
    {   /* lookup table for 4 bits at a time is affordable */
        0x00000000, 0x04C11DB7, 0x09823B6E, 0x0D4326D9, 
        0x130476DC, 0x17C56B6B, 0x1A864DB2, 0x1E475005, 
        0x2608EDB8, 0x22C9F00F, 0x2F8AD6D6, 0x2B4BCB61, 
        0x350C9B64, 0x31CD86D3, 0x3C8EA00A, 0x384FBDBD
    };
    
    unsigned char byte;
    UINT32 t;

    while (len--)
    {   
        byte = *buf++; /* get one byte of data */

        /* upper nibble of our data */
        t = crc32 >> 28; /* extract the 4 most significant bits */
        t ^= byte >> 4; /* XOR in 4 bits of data into the extracted bits */
        crc32 <<= 4; /* shift the CRC register left 4 bits */     
        crc32 ^= crc32_lookup[t]; /* do the table lookup and XOR the result */

        /* lower nibble of our data */
        t = crc32 >> 28; /* extract the 4 most significant bits */
        t ^= byte & 0x0F; /* XOR in 4 bits of data into the extracted bits */
        crc32 <<= 4; /* shift the CRC register left 4 bits */     
        crc32 ^= crc32_lookup[t]; /* do the table lookup and XOR the result */
    }
    
    return crc32;
}


/* test if the bootloader is up-to-date, returns 0 if yes, else CRC */
unsigned CheckBootloader(void)
{
    unsigned crc;
    UINT32* pFlash = (UINT32*)FB;
    int bootloader_version = FB[BOOT_VERS_ADR];

    if (bootloader_version) /* this is a newer image, with a version number */
    {
        if (bootloader_version < LATEST_BOOTLOADER_VERSION)
            return bootloader_version;
        else
            return 0;
    }

    /* checksum the bootloader, unfortunately I have no version info yet */
    crc = crc_32((unsigned char*)pFlash[2], pFlash[3], -1);

    /* Here I have to check for ARCHOS_* defines in source code, which is 
       generally strongly discouraged. But here I'm not checking for a certain 
       feature, I'm checking for the model itself. */
#if defined(ARCHOS_PLAYER)
    if (crc == 0x78DAC94A)
        return 0;
#elif defined(ARCHOS_RECORDER)
    if (crc == 0xE968702E || crc == 0x7C3D93B4) /* normal or ROMless each */
        return 0;
#elif defined(ARCHOS_RECORDERV2)
    if (crc == 0x4511E9B5 || crc == 0x3A93DBDF)
        return 0;
#elif defined(ARCHOS_FMRECORDER)
    if (crc == 0x4511E9B5 || crc == 0x3A93DBDF)
        return 0;
#endif

    return crc;
}


/*********** Image File Functions ************/

/* so far, only compressed images in UCL NRV algorithm 2e supported */
tCheckResult CheckImageFile(char* filename, int space, tImageHeader* pHeader,
                            UINT8* pos)
{
    int i;
    int fd;
    int filesize; /* size info */

    int fileread = 0; /* total size as read from the file */
    int read; /* how many for this sector */

    /* magic file header for compressed files */
    static const UINT8 magic[8] = { 0x00,0xe9,0x55,0x43,0x4c,0xff,0x01,0x1a };
    UINT8 ucl_header[UCL_HEADER];

    fd = rb->open(filename, O_RDONLY);
    if (fd < 0)
        return eFileNotFound;

    filesize = rb->filesize(fd);
    if (filesize - (int)sizeof(ucl_header) - 8 > space)
    {
        rb->close(fd);
        return eTooBig;
    }
    else if (filesize < 10000) /* give it some reasonable lower limit */
    {
        rb->close(fd);
        return eTooSmall;
    }

    /* do some sanity checks */

    read = rb->read(fd, ucl_header, sizeof(ucl_header));
    fileread += read;
    if (read != sizeof(ucl_header))
    {
        rb->close(fd);
        return eReadErr;
    }

    /* compare the magic header */
    for (i=0; i<8; i++)
    {
        if (ucl_header[i] != magic[i])
        {
            rb->close(fd);
            return eNotUCL;
        }
    }

    pHeader->size = Read32(ucl_header + 22); /* compressed size */
    if (pHeader->size != filesize - sizeof(ucl_header) - 8)
    {
        rb->close(fd);
        return eMultiBlocks;
    }

    /* fill in the hardcoded defaults of the header */
    pHeader->destination = ROCKBOX_DEST;
    pHeader->execute = ROCKBOX_EXEC;

    if (Read32(ucl_header + 18) > pHeader->size) /* compare with uncompressed
                                                    size */
    {   /* compressed, normal case */
        pHeader->flags = 0x00000001; /* flags for UCL compressed */

        /* check for supported algorithm */
        if (ucl_header[12] != 0x2E)
        {
            rb->close(fd);
            return eWrongAlgorithm;
        }
    }
    else
    {   /* uncompressed, either to be copied or run directly in flash */
        UINT32 reset_vector; /* image has to start with reset vector */

        pHeader->flags = 0x00000000; /* uncompressed */

        read = rb->read(fd, &reset_vector, sizeof(reset_vector));
        fileread += read;
        if (read != sizeof(reset_vector))
        {
            rb->close(fd);
            return eReadErr;
        }
        if (reset_vector >= (UINT32)FB 
         && reset_vector <  (UINT32)FB+512*1024) /* ROM address? */
        {
            /* assume in-place, executing directly in flash */
            pHeader->destination = (UINT32)(pos + sizeof(tImageHeader));

            /* for new RomBox, this isn't the reset vector,
               but the link address, for us to check the position */
            if(pHeader->destination != reset_vector) /* compare link addr. */
            {
                rb->close(fd);
                return eBadRomLink; /* not matching the start address */
            }

            /* read the now following reset vector */
            read = rb->read(fd, &reset_vector, sizeof(reset_vector));
            fileread += read;
            if (read != sizeof(reset_vector))
            {
                rb->close(fd);
                return eReadErr;
            }
        }

        pHeader->execute = reset_vector;
    }
    
    /* check if we can read the whole file */
    do
    {
        read = rb->read(fd, sector, SECTORSIZE);
        fileread += read;
    } while (read == SECTORSIZE);
    
    rb->close(fd);

    if (fileread != filesize)
        return eReadErr;
    
    return eOK;
}


/* returns the # of failures, 0 on success */
unsigned ProgramImageFile(char* filename, UINT8* pos,
                          tImageHeader* pImageHeader, int start, int size)
{
    int i;
    int fd;
    int read; /* how many for this sector */
    unsigned failures = 0;

    fd = rb->open(filename, O_RDONLY);
    if (fd < 0)
        return false;

    /* no error checking necessary here, we checked for minimum size
       already */
    rb->lseek(fd, start, SEEK_SET); /* go to start position */

    *(tImageHeader*)sector = *pImageHeader; /* copy header into sector
                                               buffer */
    read = rb->read(fd, sector + sizeof(tImageHeader),
                    SECTORSIZE - sizeof(tImageHeader)); /* payload behind */
    size -= read;
    read += sizeof(tImageHeader); /* to be programmed, but not part of the
                                     file */

    do {
        if (!EraseSector(pos))
        {
            /* nothing we can do, let the programming count the errors */
        }
        
        for (i=0; i<read; i++)
        {
            if (!ProgramByte(pos + i, sector[i]))
            {
                failures++;
            }
        }

        pos += SECTORSIZE;
        read = rb->read(fd, sector, (size > SECTORSIZE) ? SECTORSIZE : size);
        /* payload for next sector */
        size -= read;
    } while (read > 0);
    
    rb->close(fd);

    return failures;
}

/* returns the # of failures, 0 on success */
unsigned VerifyImageFile(char* filename, UINT8* pos,
                         tImageHeader* pImageHeader, int start, int size)
{
    int i;
    int fd;
    int read; /* how many for this sector */
    unsigned failures = 0;

    fd = rb->open(filename, O_RDONLY);
    if (fd < 0)
        return false;

    /* no error checking necessary here, we checked for minimum size
       already */
    rb->lseek(fd, start, SEEK_SET); /* go to start position */

    *(tImageHeader*)sector = *pImageHeader; /* copy header into sector
                                               buffer */
    read = rb->read(fd, sector + sizeof(tImageHeader),
                    SECTORSIZE - sizeof(tImageHeader)); /* payload behind */

    size -= read;
    read += sizeof(tImageHeader); /* to be programmed, but not part of the
                                     file */

    do
    {
        for (i=0; i<read; i++)
        {
            if (pos[i] != sector[i])
            {
                failures++;
            }
        }
        
        pos += SECTORSIZE;
        read = rb->read(fd, sector, (size > SECTORSIZE) ? SECTORSIZE : size);
        /* payload for next sector */
        size -= read;
    } while (read);
    
    rb->close(fd);
    
    return failures;
}


/***************** User Interface Functions *****************/

int WaitForButton(void)
{
    int button;
    
    do
    {
        button = rb->button_get(true);
    } while (button & BUTTON_REL);
    
    return button;
}

/* helper for DoUserDialog() */
void ShowFlashInfo(tFlashInfo* pInfo, tImageHeader* pImageHeader)
{
    char buf[32];

    if (!pInfo->manufacturer)
    {
        rb->lcd_puts_scroll(0, 0, "Flash: M=?? D=??");
    }
    else
    {
        if (pInfo->size)
        {
            rb->snprintf(buf, sizeof(buf), "Flash size: %d KB",
                         pInfo->size / 1024);
            rb->lcd_puts_scroll(0, 0, buf);
        }
        else
        {
            rb->lcd_puts_scroll(0, 0, "Unsupported chip");
        }
        
    }

    if (pImageHeader)
    {
        rb->snprintf(buf, sizeof(buf), "Image at %d KB",
                     ((UINT8*)pImageHeader - FB) / 1024);
        rb->lcd_puts_scroll(0, 1, buf);
    }
    else
    {
        rb->lcd_puts_scroll(0, 1, "No image found!");
    }
}


/* Kind of our main function, defines the application flow. */
#ifdef HAVE_LCD_BITMAP
/* recorder version */
void DoUserDialog(char* filename)
{
    tImageHeader ImageHeader;
    tFlashInfo FlashInfo;
    static char buf[MAX_PATH];
    int button;
    int rc; /* generic return code */
    UINT32 space, aligned_size, true_size;
    UINT8* pos;
    int memleft;
    UINT32 crc;
    bool show_greet = false;
    
    /* this can only work if Rockbox runs in DRAM, not flash ROM */
    if ((UINT8*)rb >= FB && (UINT8*)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 */
    }
    
    /* "allocate" memory */
    sector = rb->plugin_get_buffer(&memleft);
    if (memleft < SECTORSIZE) /* need buffer for a flash sector */
    {
        rb->splash(HZ*3, "Out of memory");
        return; /* exit */
    }

    rb->lcd_setfont(FONT_SYSFIXED);

    pos = (void*)GetSecondImage();
    rc = GetFlashInfo(&FlashInfo);

    ShowFlashInfo(&FlashInfo, (void*)pos);
    rb->lcd_update();

    if (FlashInfo.size == 0) /* no valid chip */
    {
        rb->splash(HZ*3, "Not flashable");
        return; /* exit */
    }
    else if (pos == 0)
    {
        rb->splash(HZ*3, "No image");
        return; /* exit */
    }

    crc = CheckBootloader();
    if (crc) /* outdated version found */
    {
        rb->snprintf(buf, sizeof(buf), "(check=0x%08lx)", crc);
        rb->lcd_puts(0, 0, buf);
        rb->lcd_puts(0, 1, "Hint: You're not  ");
        rb->lcd_puts(0, 2, "using the latest  ");
        rb->lcd_puts(0, 3, "bootloader.       ");
        rb->lcd_puts(0, 4, "A full reflash is ");
        rb->lcd_puts(0, 5, "recommended, but  ");
        rb->lcd_puts(0, 6, "not required.     ");
        rb->lcd_puts(0, 7, "Press " KEYNAME1 " to ignore");
        rb->lcd_update();

        if (WaitForButton() != KEY1)
        {
            return;
        }
        rb->lcd_clear_display();
    }
    
    rb->lcd_puts(0, show_greet ? 0 : 3, "Checking...");
    rb->lcd_update();

    space = FlashInfo.size - (pos-FB + sizeof(ImageHeader));
    /* size minus start */
    
    rc = CheckImageFile(filename, space, &ImageHeader, pos);
    if (rc != eOK)
    {
        rb->lcd_clear_display(); /* make room for error message */
        show_greet = true; /* verbose */
    }

    rb->lcd_puts(0, show_greet ? 0 : 3, "Checked:");
    switch (rc) {
        case eOK:
            rb->lcd_puts(0, show_greet ? 0 : 4, "File OK.");
            break;
    case eNotUCL:
            rb->lcd_puts(0, 1, "File not UCL ");
            rb->lcd_puts(0, 2, "compressed.");
            rb->lcd_puts(0, 3, "Use uclpack --2e");
            rb->lcd_puts(0, 4, " --10 rockbox.bin");
            break;
    case eWrongAlgorithm:
            rb->lcd_puts(0, 1, "Wrong algorithm");
            rb->lcd_puts(0, 2, "for compression.");
            rb->lcd_puts(0, 3, "Use uclpack --2e");
            rb->lcd_puts(0, 4, " --10 rockbox.bin");
            break;
    case eFileNotFound:
            rb->lcd_puts(0, 1, "File not found:");
            rb->lcd_puts_scroll(0, 2, filename);
            break;
    case eTooBig:
            rb->lcd_puts(0, 1, "File too big,");
            rb->lcd_puts(0, 2, "won't fit in chip.");
            break;
    case eTooSmall:
            rb->lcd_puts(0, 1, "File too small.");
            rb->lcd_puts(0, 2, "Incomplete?");
            break;
    case eReadErr:
            rb->lcd_puts(0, 1, "File read error.");
            break;
    case eMultiBlocks:
            rb->lcd_puts(0, 1, "File invalid.");
            rb->lcd_puts(0, 2, "Blocksize");
            rb->lcd_puts(0, 3, " too small?");
            break;
    case eBadRomLink:
            rb->lcd_puts(0, 1, "RomBox mismatch.");
            rb->lcd_puts(0, 2, "Wrong ROM position");
            break;
    default:
            rb->lcd_puts(0, 1, "Check failed.");
            break;
    }

    if (rc == eOK)
    {    /* was OK */
        rb->lcd_puts(0, 6, "[" KEYNAME2 "] to program");
        rb->lcd_puts(0, 7, "other key to exit");
    }
    else
    { /* error occured */
        rb->lcd_puts(0, 6, "Any key to exit");
    }
    rb->lcd_update();

    button = WaitForButton();
    if (rc != eOK || button != KEY2)
    {
        return;
    }
    
    true_size = ImageHeader.size;
    aligned_size = ((sizeof(tImageHeader) + true_size + SECTORSIZE-1) &
                    ~(SECTORSIZE-1)) - sizeof(tImageHeader); /* round up to
                                                                next flash
                                                                sector */
    ImageHeader.size = aligned_size; /* increase image size such that we reach
                                        the next sector */
    
    rb->lcd_clear_display();
    rb->lcd_puts_scroll(0, 0, "Programming...");
    rb->lcd_update();

    rc = ProgramImageFile(filename, pos, &ImageHeader, UCL_HEADER, true_size);
    if (rc)
    {   /* errors */
        rb->lcd_clear_display();
        rb->snprintf(buf, sizeof(buf), "%d errors", rc);
        rb->lcd_puts(0, 0, "Error:");
        rb->lcd_puts(0, 1, "Programming fail!");
        rb->lcd_puts(0, 2, buf);
        rb->lcd_update();
        button = WaitForButton();
    }
    
    rb->lcd_clear_display();
    rb->lcd_puts_scroll(0, 0, "Verifying...");
    rb->lcd_update();

    rc = VerifyImageFile(filename, pos, &ImageHeader, UCL_HEADER, true_size);

    rb->lcd_clear_display();
    if (rc == 0)
    {
        rb->lcd_puts(0, 0, "Verify OK.");
    }
    else
    {
        rb->snprintf(buf, sizeof(buf), "%d errors", rc);
        rb->lcd_puts(0, 0, "Error:");
        rb->lcd_puts(0, 1, "Verify fail!");
        rb->lcd_puts(0, 2, buf);
        rb->lcd_puts(0, 3, "Use safe image");
        rb->lcd_puts(0, 4, "if booting hangs:");
        rb->lcd_puts(0, 5, "F1 during power-on");
    }
    rb->lcd_puts(0, 7, "Any key to exit");
    rb->lcd_update();
    WaitForButton();
}

#else /* #ifdef HAVE_LCD_BITMAP */

/* Player version */
void DoUserDialog(char* filename)
{
    tImageHeader ImageHeader;
    tFlashInfo FlashInfo;
    static char buf[MAX_PATH];
    int button;
    int rc; /* generic return code */
    UINT32 space, aligned_size, true_size;
    UINT8* pos;
    int memleft;
    UINT32 crc;

    /* this can only work if Rockbox runs in DRAM, not flash ROM */
    if ((UINT8*)rb >= FB && (UINT8*)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, "Batt. too low!");
        return; /* exit */
    }
    
    /* "allocate" memory */
    sector = rb->plugin_get_buffer(&memleft);
    if (memleft < SECTORSIZE) /* need buffer for a flash sector */
    {
        rb->splash(HZ*3, "Out of memory");
        return; /* exit */
    }

    pos = (void*)GetSecondImage();
    rc = GetFlashInfo(&FlashInfo);

    if (FlashInfo.size == 0) /* no valid chip */
    {
        rb->splash(HZ*3, "Not flashable");
        return; /* exit */
    }
    else if (pos == 0)
    {
        rb->splash(HZ*3, "No image");
        return; /* exit */
    }
    
    crc = CheckBootloader();
    if (crc) /* outdated version found */
    {
        rb->lcd_puts_scroll(0, 0, "Hint: You're not using the latest bootloader. A full reflash is recommended, but not required.");
        rb->lcd_puts_scroll(0, 1, "Press [Menu] to ignore");

        if (WaitForButton() != BUTTON_MENU)
        {
            return;
        }
        rb->lcd_clear_display();
    }

    rb->lcd_puts(0, 0, "Checking...");

    space = FlashInfo.size - (pos-FB + sizeof(ImageHeader));
    /* size minus start */
    
    rc = CheckImageFile(filename, space, &ImageHeader, pos);
    rb->lcd_puts(0, 0, "Checked:");
    switch (rc) {
        case eOK:
            rb->lcd_puts(0, 1, "File OK.");
            rb->sleep(HZ*1);
            break;
    case eNotUCL:
            rb->lcd_puts_scroll(0, 1, "File not UCL compressed.");
            break;
    case eWrongAlgorithm:
            rb->lcd_puts_scroll(0, 1, "Wrong compression algorithm.");
            break;
    case eFileNotFound:
            rb->lcd_puts_scroll(0, 1, "File not found.");
            break;
    case eTooBig:
            rb->lcd_puts_scroll(0, 1, "File too big.");
            break;
    case eTooSmall:
            rb->lcd_puts_scroll(0, 1, "File too small. Incomplete?");
            break;
    case eReadErr:
            rb->lcd_puts_scroll(0, 1, "File read error.");
            break;
    case eMultiBlocks:
            rb->lcd_puts_scroll(0, 1, "File invalid. Blocksize too small?");
            break;
    case eBadRomLink:
            rb->lcd_puts_scroll(0, 1, "BootBox mismatch");
            break;
    default:
            rb->lcd_puts_scroll(0, 1, "Check failed.");
            break;
    }

    if (rc == eOK)
    {    /* was OK */
        rb->lcd_clear_display();
        rb->lcd_puts_scroll(0, 0, "[ON] to program,");
        rb->lcd_puts_scroll(0, 1, "other key to exit.");
    }
    else
    { /* error occured */
        WaitForButton();
        rb->lcd_clear_display();
        rb->lcd_puts_scroll(0, 0, "Flash failed.");
        rb->lcd_puts_scroll(0, 1, "Any key to exit.");
    }

    button = WaitForButton();
    if (rc != eOK || button != BUTTON_ON)
    {
        return;
    }
    
    true_size = ImageHeader.size;
    aligned_size = ((sizeof(tImageHeader) + true_size + SECTORSIZE-1) &
                    ~(SECTORSIZE-1)) - sizeof(tImageHeader); /* round up to
                                                                next flash
                                                                sector */
    ImageHeader.size = aligned_size; /* increase image size such that we reach
                                        the next sector */
    
    rb->lcd_clear_display();
    rb->lcd_puts_scroll(0, 0, "Programming...");

    rc = ProgramImageFile(filename, pos, &ImageHeader, UCL_HEADER, true_size);
    if (rc)
    {   /* errors */
        rb->lcd_clear_display();
        rb->snprintf(buf, sizeof(buf), "%d errors", rc);
        rb->lcd_puts_scroll(0, 0, "Programming failed!");
        rb->lcd_puts_scroll(0, 1, buf);
        button = WaitForButton();
    }
    
    rb->lcd_clear_display();
    rb->lcd_puts_scroll(0, 0, "Verifying...");

    rc = VerifyImageFile(filename, pos, &ImageHeader, UCL_HEADER, true_size);

    rb->lcd_clear_display();
    if (rc == 0)
    {
        rb->lcd_puts(0, 0, "Verify OK.");
    }
    else
    {
        rb->snprintf(buf, sizeof(buf), "Verify fail! %d errors", rc);
        rb->lcd_puts_scroll(0, 0, buf);
        rb->lcd_puts_scroll(0, 1, "Use safe image if booting hangs: [-] during power-on");
        button = WaitForButton();
    }
}

#endif /* not HAVE_LCD_BITMAP */



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

enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
{
    int oldmode;

    rb = api; /* copy to global api pointer */

    if (parameter == NULL)
    {
        rb->splash(HZ*3, "Play .ucl file!");
        return PLUGIN_OK;
    }

    /* 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;
}


#endif /* !SIMULATOR or a SH-target */