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rockbox/firmware/rolo.c

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C
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/***************************************************************************
* __________ __ ___.
* 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 "lcd-remote.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 !defined(IRIVER_IFP7XX_SERIES) && \
(CONFIG_CPU != PP5002) && (CONFIG_CPU != S3C2440)
/* FIX: this doesn't work on iFP, 3rd Gen ipods */
#define IRQ0_EDGE_TRIGGER 0x80
#ifdef CPU_PP
/* Handle the COP properly - it needs to jump to a function outside SDRAM while
* the new firmware is being loaded, and then jump to the start of SDRAM
* TODO: Use the mailboxes built into the PP processor for this
*/
volatile unsigned char IDATA_ATTR cpu_message = 0;
volatile unsigned char IDATA_ATTR cpu_reply = 0;
void rolo_restart_cop(void) ICODE_ATTR;
void rolo_restart_cop(void)
{
/* Invalidate cache */
invalidate_icache();
/* Disable cache */
CACHE_CTL = CACHE_DISABLE;
/* Tell the main core that we're ready to reload */
cpu_reply = 2;
/* Wait while RoLo loads the image into SDRAM */
/* TODO: Accept checksum failure gracefully */
while(cpu_message == 1) {}
/* Acknowledge the CPU and then reload */
cpu_reply = 1;
asm volatile(
"mov r0, #0x10000000 \n"
"mov pc, r0 \n"
);
}
#endif
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;
#if (CONFIG_CPU==PP5020) || (CONFIG_CPU==PP5024)
unsigned long* memmapregs = (unsigned long*)0xf000f000;
#endif
for(i = 0;i < length;i++)
*localdest++ = *source++;
#if defined(CPU_COLDFIRE)
asm (
"movec.l %0,%%vbr \n"
"move.l (%0)+,%%sp \n"
"move.l (%0),%0 \n"
"jmp (%0) \n"
: : "a"(dest)
);
#elif (CONFIG_CPU==PP5020) || (CONFIG_CPU==PP5024)
/* Tell the COP that we've finished loading and started rebooting */
cpu_message = 0;
/* Flush cache */
flush_icache();
/* Disable cache */
CACHE_CTL = CACHE_DISABLE;
/* Reset the memory mapping registers to zero */
for (i=0;i<8;i++)
memmapregs[i]=0;
/* Wait for the COP to tell us it is rebooting */
while(cpu_reply != 1) {}
asm volatile(
"mov r0, #0x10000000 \n"
"mov pc, r0 \n"
);
#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 defined(CPU_COLDFIRE) || defined(CPU_PP)
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();
#ifdef HAVE_REMOTE_LCD
lcd_remote_clear_display();
lcd_remote_puts(0, 0, "ROLO...");
lcd_remote_puts(0, 1, "Loading");
lcd_remote_update();
#endif
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 defined(CPU_COLDFIRE) || defined(CPU_PP)
/* 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;
}
/* Rockbox checksums are big-endian */
file_checksum = betoh32(file_checksum);
#ifdef CPU_PP
cpu_message = COP_REBOOT;
COP_CTL = PROC_WAKE;
lcd_puts(0, 2, "Waiting for coprocessor...");
lcd_update();
while(cpu_reply != 2) {}
lcd_puts(0, 2, " ");
lcd_update();
#endif
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();
#ifdef HAVE_REMOTE_LCD
lcd_remote_puts(0, 1, "Executing");
lcd_remote_update();
#endif
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 /* !defined(IRIVER_IFP7XX_SERIES) */
int rolo_load(const char* filename)
{
/* dummy */
(void)filename;
return 0;
}
#endif /* !defined(IRIVER_IFP7XX_SERIES) */
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