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 #if !defined(IRIVER_IFP7XX_SERIES) && \
  34     (CONFIG_CPU != PP5002) && (CONFIG_CPU != S3C2440)
  35 /* FIX: this doesn't work on iFP, 3rd Gen ipods */
  36
  37 #define IRQ0_EDGE_TRIGGER 0x80
  38
  39 #ifdef CPU_PP
  40 /* Handle the COP properly - it needs to jump to a function outside SDRAM while
  41  * the new firmware is being loaded, and then jump to the start of SDRAM
  42  * TODO: Use the mailboxes built into the PP processor for this
  43  */
  44
  45 volatile unsigned char IDATA_ATTR cpu_message = 0;
  46 volatile unsigned char IDATA_ATTR cpu_reply = 0;
  47
  48 void rolo_restart_cop(void) ICODE_ATTR;
  49 void rolo_restart_cop(void)
  50 {
  51     /* Invalidate cache */
  52     invalidate_icache();
  53
  54     /* Disable cache */
  55     CACHE_CTL = CACHE_DISABLE;
  56
  57     /* Tell the main core that we're ready to reload */
  58     cpu_reply = 2;
  59
  60     /* Wait while RoLo loads the image into SDRAM */
  61     /* TODO: Accept checksum failure gracefully */
  62     while(cpu_message == 1) {}
  63
  64     /* Acknowledge the CPU and then reload */
  65     cpu_reply = 1;
  66
  67     asm volatile(
  68         "mov   r0, #0x10000000   \n"
  69         "mov   pc, r0            \n"
  70     );
  71 }
  72 #endif
  73
  74 static void rolo_error(const char *text)
  75 {
  76     lcd_clear_display();
  77     lcd_puts(0, 0, "ROLO error:");
  78     lcd_puts_scroll(0, 1, text);
  79     lcd_update();
  80     button_get(true);
  81     button_get(true);
  82     button_get(true);
  83     lcd_stop_scroll();
  84 }
  85
  86 #if CONFIG_CPU == SH7034
  87 /* these are in assembler file "descramble.S" */
  88 extern unsigned short descramble(const unsigned char* source,
  89                                  unsigned char* dest, int length);
  90 extern void rolo_restart(const unsigned char* source, unsigned char* dest,
  91                          int length);
  92 #else
  93 void rolo_restart(const unsigned char* source, unsigned char* dest,
  94                   long length)  __attribute__ ((section (".icode")));
  95 void rolo_restart(const unsigned char* source, unsigned char* dest,
  96                          long length)
  97 {
  98     long i;
  99     unsigned char* localdest = dest;
 100 #if (CONFIG_CPU==PP5020) || (CONFIG_CPU==PP5024)
 101     unsigned long* memmapregs = (unsigned long*)0xf000f000;
 102 #endif
 103
 104     for(i = 0;i < length;i++)
 105         *localdest++ = *source++;
 106
 107 #if defined(CPU_COLDFIRE)
 108     asm (
 109         "movec.l %0,%%vbr    \n"
 110         "move.l  (%0)+,%%sp  \n"
 111         "move.l  (%0),%0     \n"
 112         "jmp     (%0)        \n"
 113         : : "a"(dest)
 114     );
 115 #elif (CONFIG_CPU==PP5020) || (CONFIG_CPU==PP5024)
 116
 117     /* Tell the COP that we've finished loading and started rebooting */
 118     cpu_message = 0;
 119
 120     /* Flush cache */
 121     flush_icache();
 122
 123     /* Disable cache */
 124     CACHE_CTL = CACHE_DISABLE;
 125
 126     /* Reset the memory mapping registers to zero */
 127     for (i=0;i<8;i++)
 128         memmapregs[i]=0;
 129
 130     /* Wait for the COP to tell us it is rebooting */
 131     while(cpu_reply != 1) {}
 132
 133     asm volatile(
 134         "mov   r0, #0x10000000   \n"
 135         "mov   pc, r0            \n"
 136     );
 137 #endif
 138 }
 139 #endif
 140
 141 /* This is assigned in the linker control file */
 142 extern unsigned long loadaddress;
 143
 144 /***************************************************************************
 145  *
 146  * Name: rolo_load_app(char *filename,int scrambled)
 147  * Filename must be a fully defined filename including the path and extension
 148  *
 149  ***************************************************************************/
 150 int rolo_load(const char* filename)
 151 {
 152     int fd;
 153     long length;
 154 #if defined(CPU_COLDFIRE) || defined(CPU_PP)
 155     int i;
 156     unsigned long checksum,file_checksum;
 157 #else
 158     long file_length;
 159     unsigned short checksum,file_checksum;
 160 #endif
 161     unsigned char* ramstart = (void*)&loadaddress;
 162
 163     lcd_clear_display();
 164     lcd_puts(0, 0, "ROLO...");
 165     lcd_puts(0, 1, "Loading");
 166     lcd_update();
 167 #ifdef HAVE_REMOTE_LCD
 168     lcd_remote_clear_display();
 169     lcd_remote_puts(0, 0, "ROLO...");
 170     lcd_remote_puts(0, 1, "Loading");
 171     lcd_remote_update();
 172 #endif
 173
 174     audio_stop();
 175
 176     fd = open(filename, O_RDONLY);
 177     if(-1 == fd) {
 178         rolo_error("File not found");
 179         return -1;
 180     }
 181
 182     length = filesize(fd) - FIRMWARE_OFFSET_FILE_DATA;
 183
 184 #if defined(CPU_COLDFIRE) || defined(CPU_PP)
 185     /* Read and save checksum */
 186     lseek(fd, FIRMWARE_OFFSET_FILE_CRC, SEEK_SET);
 187     if (read(fd, &file_checksum, 4) != 4) {
 188         rolo_error("Error Reading checksum");
 189         return -1;
 190     }
 191
 192     /* Rockbox checksums are big-endian */
 193     file_checksum = betoh32(file_checksum);
 194 #ifdef CPU_PP
 195     cpu_message = COP_REBOOT;
 196     COP_CTL = PROC_WAKE;
 197     lcd_puts(0, 2, "Waiting for coprocessor...");
 198     lcd_update();
 199     while(cpu_reply != 2) {}
 200     lcd_puts(0, 2, "                          ");
 201     lcd_update();
 202 #endif
 203
 204     lseek(fd, FIRMWARE_OFFSET_FILE_DATA, SEEK_SET);
 205
 206     if (read(fd, audiobuf, length) != length) {
 207         rolo_error("Error Reading File");
 208         return -1;
 209     }
 210
 211     checksum = MODEL_NUMBER;
 212
 213     for(i = 0;i < length;i++) {
 214         checksum += audiobuf[i];
 215     }
 216
 217     /* Verify checksum against file header */
 218     if (checksum != file_checksum) {
 219         rolo_error("Checksum Error");
 220         return -1;
 221     }
 222
 223     lcd_puts(0, 1, "Executing");
 224     lcd_update();
 225 #ifdef HAVE_REMOTE_LCD
 226     lcd_remote_puts(0, 1, "Executing");
 227     lcd_remote_update();
 228 #endif
 229
 230     set_irq_level(HIGHEST_IRQ_LEVEL);
 231 #elif CONFIG_CPU == SH7034
 232     /* Read file length from header and compare to real file length */
 233     lseek(fd, FIRMWARE_OFFSET_FILE_LENGTH, SEEK_SET);
 234     if(read(fd, &file_length, 4) != 4) {
 235         rolo_error("Error Reading File Length");
 236         return -1;
 237     }
 238     if (length != file_length) {
 239         rolo_error("File length mismatch");
 240         return -1;
 241     }
 242
 243     /* Read and save checksum */
 244     lseek(fd, FIRMWARE_OFFSET_FILE_CRC, SEEK_SET);
 245     if (read(fd, &file_checksum, 2) != 2) {
 246         rolo_error("Error Reading checksum");
 247         return -1;
 248     }
 249     lseek(fd, FIRMWARE_OFFSET_FILE_DATA, SEEK_SET);
 250
 251     /* verify that file can be read and descrambled */
 252     if ((audiobuf + (2*length)+4) >= audiobufend) {
 253         rolo_error("Not enough room to load file");
 254         return -1;
 255     }
 256
 257     if (read(fd, &audiobuf[length], length) != (int)length) {
 258         rolo_error("Error Reading File");
 259         return -1;
 260     }
 261
 262     lcd_puts(0, 1, "Descramble");
 263     lcd_update();
 264
 265     checksum = descramble(audiobuf + length, audiobuf, length);
 266
 267     /* Verify checksum against file header */
 268     if (checksum != file_checksum) {
 269         rolo_error("Checksum Error");
 270         return -1;
 271     }
 272
 273     lcd_puts(0, 1, "Executing     ");
 274     lcd_update();
 275
 276     set_irq_level(HIGHEST_IRQ_LEVEL);
 277
 278     /* Calling these 2 initialization routines was necessary to get the
 279        the origional Archos version of the firmware to load and execute. */
 280     system_init();           /* Initialize system for restart */
 281     i2c_init();              /* Init i2c bus - it seems like a good idea */
 282     ICR = IRQ0_EDGE_TRIGGER; /* Make IRQ0 edge triggered */
 283     TSTR = 0xE0;             /* disable all timers */
 284     /* model-specific de-init, needed when flashed */
 285     /* Especially the Archos software is picky about this */
 286 #if defined(ARCHOS_RECORDER) || defined(ARCHOS_RECORDERV2) || \
 287     defined(ARCHOS_FMRECORDER)
 288     PAIOR = 0x0FA0;
 289 #endif
 290 #endif
 291     rolo_restart(audiobuf, ramstart, length);
 292
 293     return 0; /* this is never reached */
 294 }
 295 #else  /* !defined(IRIVER_IFP7XX_SERIES) */
 296 int rolo_load(const char* filename)
 297 {
 298     /* dummy */
 299     (void)filename;
 300     return 0;
 301 }
 302
 303 #endif /* !defined(IRIVER_IFP7XX_SERIES) */