summaryrefslogtreecommitdiffstats
path: root/firmware/rolo.c
blob: 958db56322ac1458e96087d253088c20095f2592 (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
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2002 Randy D. Wood
 *
 * 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 "config.h"
#include "lcd.h"
#include "kernel.h"
#include "sprintf.h"
#include "button.h"
#include "file.h"
#include "audio.h"
#include "system.h"
#include "i2c.h"
#include "string.h"
#include "buffer.h"

#if (CONFIG_CPU != TCC730) && !defined(IRIVER_IFP7XX_SERIES)
/* FIX: this doesn't work on Gmini and iFP yet */

#define IRQ0_EDGE_TRIGGER 0x80

static void rolo_error(const char *text)
{
    lcd_clear_display();
    lcd_puts(0, 0, "ROLO error:");
    lcd_puts_scroll(0, 1, text);
    lcd_update();
    button_get(true);
    button_get(true);
    button_get(true);
    lcd_stop_scroll();
}

#if CONFIG_CPU == SH7034
/* these are in assembler file "descramble.S" */
extern unsigned short descramble(const unsigned char* source,
                                 unsigned char* dest, int length);
extern void rolo_restart(const unsigned char* source, unsigned char* dest,
                         int length);
#else
void rolo_restart(const unsigned char* source, unsigned char* dest,
                  long length)  __attribute__ ((section (".icode")));
void rolo_restart(const unsigned char* source, unsigned char* dest,
                         long length)
{
    long i;
    unsigned char* localdest = dest;

    for(i = 0;i < length;i++)
        *localdest++ = *source++;

#if CONFIG_CPU == MCF5249
    asm (
        "movec.l %0,%%vbr    \n"
        "move.l  (%0)+,%%sp  \n"
        "move.l  (%0),%0     \n"
        "jmp     (%0)        \n"
        : : "a"(dest)
    );
#endif
#if CONFIG_CPU == PP5020
    /* TODO: Implement for iPod */
#endif
}
#endif

/* This is assigned in the linker control file */
extern unsigned long loadaddress;

/***************************************************************************
 *
 * Name: rolo_load_app(char *filename,int scrambled)
 * Filename must be a fully defined filename including the path and extension
 *
 ***************************************************************************/
int rolo_load(const char* filename)
{
    int fd;
    long length;
#if CONFIG_CPU == MCF5249 || CONFIG_CPU == PP5020
    int i;
    unsigned long checksum,file_checksum;
#else
    long file_length;
    unsigned short checksum,file_checksum;
#endif
    unsigned char* ramstart = (void*)&loadaddress;

    lcd_clear_display();
    lcd_puts(0, 0, "ROLO...");
    lcd_puts(0, 1, "Loading");
    lcd_update();

    audio_stop();

    fd = open(filename, O_RDONLY);
    if(-1 == fd) {
        rolo_error("File not found");
        return -1;
    }

    length = filesize(fd) - FIRMWARE_OFFSET_FILE_DATA;

#if CONFIG_CPU == MCF5249 || CONFIG_CPU == PP5020
    /* Read and save checksum */
    lseek(fd, FIRMWARE_OFFSET_FILE_CRC, SEEK_SET);
    if (read(fd, &file_checksum, 4) != 4) {
        rolo_error("Error Reading checksum");
        return -1;
    }
    lseek(fd, FIRMWARE_OFFSET_FILE_DATA, SEEK_SET);

    if (read(fd, audiobuf, length) != length) {
        rolo_error("Error Reading File");
        return -1;
    }

    checksum = MODEL_NUMBER;
    
    for(i = 0;i < length;i++) {
        checksum += audiobuf[i];
    }

    /* Verify checksum against file header */
    if (checksum != file_checksum) {
        rolo_error("Checksum Error");
        return -1;
    }

    lcd_puts(0, 1, "Executing     ");
    lcd_update();

    set_irq_level(HIGHEST_IRQ_LEVEL);
#elif CONFIG_CPU == SH7034
    /* Read file length from header and compare to real file length */
    lseek(fd, FIRMWARE_OFFSET_FILE_LENGTH, SEEK_SET);
    if(read(fd, &file_length, 4) != 4) {
        rolo_error("Error Reading File Length");
        return -1;
    }
    if (length != file_length) {
        rolo_error("File length mismatch");
        return -1;
    }
    
    /* Read and save checksum */
    lseek(fd, FIRMWARE_OFFSET_FILE_CRC, SEEK_SET);
    if (read(fd, &file_checksum, 2) != 2) {
        rolo_error("Error Reading checksum");
        return -1;
    }
    lseek(fd, FIRMWARE_OFFSET_FILE_DATA, SEEK_SET);

    /* verify that file can be read and descrambled */
    if ((audiobuf + (2*length)+4) >= audiobufend) {
        rolo_error("Not enough room to load file");
        return -1;
    }

    if (read(fd, &audiobuf[length], length) != (int)length) {
        rolo_error("Error Reading File");
        return -1;
    }

    lcd_puts(0, 1, "Descramble");
    lcd_update();

    checksum = descramble(audiobuf + length, audiobuf, length);
    
    /* Verify checksum against file header */
    if (checksum != file_checksum) {
        rolo_error("Checksum Error");
        return -1;
    }

    lcd_puts(0, 1, "Executing     ");
    lcd_update();

    set_irq_level(HIGHEST_IRQ_LEVEL);
    
    /* Calling these 2 initialization routines was necessary to get the
       the origional Archos version of the firmware to load and execute. */
    system_init();           /* Initialize system for restart */
    i2c_init();              /* Init i2c bus - it seems like a good idea */
    ICR = IRQ0_EDGE_TRIGGER; /* Make IRQ0 edge triggered */
    TSTR = 0xE0;             /* disable all timers */
    /* model-specific de-init, needed when flashed */
    /* Especially the Archos software is picky about this */
#if defined(ARCHOS_RECORDER) || defined(ARCHOS_RECORDERV2) || \
    defined(ARCHOS_FMRECORDER)
    PAIOR = 0x0FA0;
#endif
#endif
    rolo_restart(audiobuf, ramstart, length);

    return 0; /* this is never reached */
}
#else  /* (CONFIG_CPU != TCC730) && !defined(IRIVER_IFP7XX_SERIES) */
int rolo_load(const char* filename)
{
    /* dummy */
    (void)filename;
    return 0;
}

#endif /* (CONFIG_CPU != TCC730) && !defined(IRIVER_IFP7XX_SERIES) */