firmware/rolo.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 Randy D. Wood
  11  *
  12  * All files in this archive are subject to the GNU General Public License.
  13  * See the file COPYING in the source tree root for full license agreement.
  14  *
  15  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  16  * KIND, either express or implied.
  17  *
  18  ****************************************************************************/
  19
  20 #include "config.h"
  21 #include "lcd.h"
  22 #include "lcd-remote.h"
  23 #include "kernel.h"
  24 #include "sprintf.h"
  25 #include "button.h"
  26 #include "file.h"
  27 #include "audio.h"
  28 #include "system.h"
  29 #include "i2c.h"
  30 #include "string.h"
  31 #include "buffer.h"
  32
  33 #ifdef MI4_FORMAT
  34 #include "crc32-mi4.h"
  35 #undef FIRMWARE_OFFSET_FILE_CRC
  36 #undef FIRMWARE_OFFSET_FILE_DATA
  37 #define FIRMWARE_OFFSET_FILE_CRC     0xC
  38 #define FIRMWARE_OFFSET_FILE_DATA    0x200
  39 #endif
  40
  41 #if !defined(IRIVER_IFP7XX_SERIES) && \
  42     (CONFIG_CPU != PP5002) && (CONFIG_CPU != S3C2440)
  43 /* FIX: this doesn't work on iFP, 3rd Gen ipods */
  44
  45 #define IRQ0_EDGE_TRIGGER 0x80
  46
  47 #ifdef CPU_PP
  48 /* Handle the COP properly - it needs to jump to a function outside SDRAM while
  49  * the new firmware is being loaded, and then jump to the start of SDRAM
  50  * TODO: Use the mailboxes built into the PP processor for this
  51  */
  52
  53 volatile unsigned char IDATA_ATTR cpu_message = 0;
  54 volatile unsigned char IDATA_ATTR cpu_reply = 0;
  55
  56 void rolo_restart_cop(void) ICODE_ATTR;
  57 void rolo_restart_cop(void)
  58 {
  59     /* Invalidate cache */
  60     invalidate_icache();
  61
  62     /* Disable cache */
  63     CACHE_CTL = CACHE_DISABLE;
  64
  65     /* Tell the main core that we're ready to reload */
  66     cpu_reply = 2;
  67
  68     /* Wait while RoLo loads the image into SDRAM */
  69     /* TODO: Accept checksum failure gracefully */
  70     while(cpu_message == 1) {}
  71
  72     /* Acknowledge the CPU and then reload */
  73     cpu_reply = 1;
  74
  75     asm volatile(
  76         "mov   r0, #0x10000000   \n"
  77         "mov   pc, r0            \n"
  78     );
  79 }
  80 #endif
  81
  82 static void rolo_error(const char *text)
  83 {
  84     lcd_clear_display();
  85     lcd_puts(0, 0, "ROLO error:");
  86     lcd_puts_scroll(0, 1, text);
  87     lcd_update();
  88     button_get(true);
  89     button_get(true);
  90     button_get(true);
  91     lcd_stop_scroll();
  92 }
  93
  94 #if CONFIG_CPU == SH7034
  95 /* these are in assembler file "descramble.S" */
  96 extern unsigned short descramble(const unsigned char* source,
  97                                  unsigned char* dest, int length);
  98 extern void rolo_restart(const unsigned char* source, unsigned char* dest,
  99                          int length);
 100 #else
 101 void rolo_restart(const unsigned char* source, unsigned char* dest,
 102                   long length)  __attribute__ ((section (".icode")));
 103 void rolo_restart(const unsigned char* source, unsigned char* dest,
 104                          long length)
 105 {
 106     long i;
 107     unsigned char* localdest = dest;
 108 #if (CONFIG_CPU==PP5020) || (CONFIG_CPU==PP5024)
 109     unsigned long* memmapregs = (unsigned long*)0xf000f000;
 110 #endif
 111
 112     for(i = 0;i < length;i++)
 113         *localdest++ = *source++;
 114
 115 #if defined(CPU_COLDFIRE)
 116     asm (
 117         "movec.l %0,%%vbr    \n"
 118         "move.l  (%0)+,%%sp  \n"
 119         "move.l  (%0),%0     \n"
 120         "jmp     (%0)        \n"
 121         : : "a"(dest)
 122     );
 123 #elif (CONFIG_CPU==PP5020) || (CONFIG_CPU==PP5024)
 124
 125     /* Tell the COP that we've finished loading and started rebooting */
 126     cpu_message = 0;
 127
 128     /* Flush cache */
 129     flush_icache();
 130
 131     /* Disable cache */
 132     CACHE_CTL = CACHE_DISABLE;
 133
 134     /* Reset the memory mapping registers to zero */
 135     for (i=0;i<8;i++)
 136         memmapregs[i]=0;
 137
 138     /* Wait for the COP to tell us it is rebooting */
 139     while(cpu_reply != 1) {}
 140
 141     asm volatile(
 142         "mov   r0, #0x10000000   \n"
 143         "mov   pc, r0            \n"
 144     );
 145 #endif
 146 }
 147 #endif
 148
 149 /* This is assigned in the linker control file */
 150 extern unsigned long loadaddress;
 151
 152 /***************************************************************************
 153  *
 154  * Name: rolo_load_app(char *filename,int scrambled)
 155  * Filename must be a fully defined filename including the path and extension
 156  *
 157  ***************************************************************************/
 158 int rolo_load(const char* filename)
 159 {
 160     int fd;
 161     long length;
 162 #if defined(CPU_COLDFIRE) || defined(CPU_PP)
 163 #if !defined(MI4_FORMAT)
 164     int i;
 165 #endif
 166     unsigned long checksum,file_checksum;
 167 #else
 168     long file_length;
 169     unsigned short checksum,file_checksum;
 170 #endif
 171     unsigned char* ramstart = (void*)&loadaddress;
 172
 173     lcd_clear_display();
 174     lcd_puts(0, 0, "ROLO...");
 175     lcd_puts(0, 1, "Loading");
 176     lcd_update();
 177 #ifdef HAVE_REMOTE_LCD
 178     lcd_remote_clear_display();
 179     lcd_remote_puts(0, 0, "ROLO...");
 180     lcd_remote_puts(0, 1, "Loading");
 181     lcd_remote_update();
 182 #endif
 183
 184     audio_stop();
 185
 186     fd = open(filename, O_RDONLY);
 187     if(-1 == fd) {
 188         rolo_error("File not found");
 189         return -1;
 190     }
 191
 192     length = filesize(fd) - FIRMWARE_OFFSET_FILE_DATA;
 193
 194 #if defined(CPU_COLDFIRE) || defined(CPU_PP)
 195     /* Read and save checksum */
 196     lseek(fd, FIRMWARE_OFFSET_FILE_CRC, SEEK_SET);
 197     if (read(fd, &file_checksum, 4) != 4) {
 198         rolo_error("Error Reading checksum");
 199         return -1;
 200     }
 201
 202 #if !defined(MI4_FORMAT)
 203     /* Rockbox checksums are big-endian */
 204     file_checksum = betoh32(file_checksum);
 205 #endif
 206
 207 #ifdef CPU_PP
 208     cpu_message = COP_REBOOT;
 209     COP_CTL = PROC_WAKE;
 210     lcd_puts(0, 2, "Waiting for coprocessor...");
 211     lcd_update();
 212     while(cpu_reply != 2) {}
 213     lcd_puts(0, 2, "                          ");
 214     lcd_update();
 215 #endif
 216
 217     lseek(fd, FIRMWARE_OFFSET_FILE_DATA, SEEK_SET);
 218
 219     if (read(fd, audiobuf, length) != length) {
 220         rolo_error("Error Reading File");
 221         return -1;
 222     }
 223
 224 #ifdef MI4_FORMAT
 225     /* Check CRC32 to see if we have a valid file */
 226     chksum_crc32gentab();
 227     checksum = chksum_crc32 (audiobuf, length);
 228 #else
 229     checksum = MODEL_NUMBER;
 230
 231     for(i = 0;i < length;i++) {
 232         checksum += audiobuf[i];
 233     }
 234 #endif
 235
 236     /* Verify checksum against file header */
 237     if (checksum != file_checksum) {
 238         rolo_error("Checksum Error");
 239         return -1;
 240     }
 241
 242     lcd_puts(0, 1, "Executing");
 243     lcd_update();
 244 #ifdef HAVE_REMOTE_LCD
 245     lcd_remote_puts(0, 1, "Executing");
 246     lcd_remote_update();
 247 #endif
 248
 249     set_irq_level(HIGHEST_IRQ_LEVEL);
 250 #elif CONFIG_CPU == SH7034
 251     /* Read file length from header and compare to real file length */
 252     lseek(fd, FIRMWARE_OFFSET_FILE_LENGTH, SEEK_SET);
 253     if(read(fd, &file_length, 4) != 4) {
 254         rolo_error("Error Reading File Length");
 255         return -1;
 256     }
 257     if (length != file_length) {
 258         rolo_error("File length mismatch");
 259         return -1;
 260     }
 261
 262     /* Read and save checksum */
 263     lseek(fd, FIRMWARE_OFFSET_FILE_CRC, SEEK_SET);
 264     if (read(fd, &file_checksum, 2) != 2) {
 265         rolo_error("Error Reading checksum");
 266         return -1;
 267     }
 268     lseek(fd, FIRMWARE_OFFSET_FILE_DATA, SEEK_SET);
 269
 270     /* verify that file can be read and descrambled */
 271     if ((audiobuf + (2*length)+4) >= audiobufend) {
 272         rolo_error("Not enough room to load file");
 273         return -1;
 274     }
 275
 276     if (read(fd, &audiobuf[length], length) != (int)length) {
 277         rolo_error("Error Reading File");
 278         return -1;
 279     }
 280
 281     lcd_puts(0, 1, "Descramble");
 282     lcd_update();
 283
 284     checksum = descramble(audiobuf + length, audiobuf, length);
 285
 286     /* Verify checksum against file header */
 287     if (checksum != file_checksum) {
 288         rolo_error("Checksum Error");
 289         return -1;
 290     }
 291
 292     lcd_puts(0, 1, "Executing     ");
 293     lcd_update();
 294
 295     set_irq_level(HIGHEST_IRQ_LEVEL);
 296
 297     /* Calling these 2 initialization routines was necessary to get the
 298        the origional Archos version of the firmware to load and execute. */
 299     system_init();           /* Initialize system for restart */
 300     i2c_init();              /* Init i2c bus - it seems like a good idea */
 301     ICR = IRQ0_EDGE_TRIGGER; /* Make IRQ0 edge triggered */
 302     TSTR = 0xE0;             /* disable all timers */
 303     /* model-specific de-init, needed when flashed */
 304     /* Especially the Archos software is picky about this */
 305 #if defined(ARCHOS_RECORDER) || defined(ARCHOS_RECORDERV2) || \
 306     defined(ARCHOS_FMRECORDER)
 307     PAIOR = 0x0FA0;
 308 #endif
 309 #endif
 310     rolo_restart(audiobuf, ramstart, length);
 311
 312     return 0; /* this is never reached */
 313 }
 314 #else  /* !defined(IRIVER_IFP7XX_SERIES) */
 315 int rolo_load(const char* filename)
 316 {
 317     /* dummy */
 318     (void)filename;
 319     return 0;
 320 }
 321
 322 #endif /* !defined(IRIVER_IFP7XX_SERIES) */