/* avoid that an alarm occurs when the device is on because this locks the ON key forever */
void rtc_enable_alarm(bool enable)
{
unsigned char data = rtc_read(0x0a);
if (enable)
{
data |= 0xa0; /* turn bit d7=AFE and d5=ABE on */
}
else
data &= 0x5f; /* turn bit d7=AFE and d5=ABE off */
rtc_write(0x0a, data);
/* check if alarm flag AF is off (as it should be) */
/* in some cases enabling the alarm results in an activated AF flag */
/* this should not happen, but it does */
/* if you know why, tell me! */
/* for now, we try again forever in this case */
while (rtc_check_alarm_flag()) /* on */
{
data &= 0x5f; /* turn bit d7=AFE and d5=ABE off */
rtc_write(0x0a, data);
sleep(HZ / 10);
rtc_check_alarm_flag();
data |= 0xa0; /* turn bit d7=AFE and d5=ABE on */
rtc_write(0x0a, data);
}
}
/* (check for AF, which => started using wakeup alarm) */
bool rtc_check_alarm_started(bool release_alarm)
{
static bool alarm_state, run_before;
bool rc;
if (run_before) {
rc = alarm_state;
alarm_state &= ~release_alarm;
} else {
/* This call resets AF, so we store the state for later recall */
rc = alarm_state = rtc_check_alarm_flag();
run_before = true;
}
return rc;
}
static void power_thread_rtc_process(void)
{
if (rtc_check_alarm_flag())
rtc_enable_alarm(false);
}
void main(void)
{
unsigned char* loadbuffer;
int buffer_size;
int rc;
int(*kernel_entry)(void);
system_init();
kernel_init(); /* Need the kernel to sleep */
enable_interrupt(IRQ_FIQ_STATUS);
lcd_init();
backlight_init();
button_init();
font_init();
adc_init();
lcd_setfont(FONT_SYSFIXED);
/* These checks should only run if the bootloader is flashed */
if(GSTATUS3&0x02)
{
GSTATUS3&=0xFFFFFFFD;
if(!(GPGDAT&BUTTON_POWER) && charger_inserted())
{
while(!(GPGDAT&BUTTON_POWER) && charger_inserted())
{
char msg[20];
if(charging_state())
{
snprintf(msg,sizeof(msg),"Charging");
}
else
{
snprintf(msg,sizeof(msg),"Charge Complete");
}
reset_screen();
lcd_putsxy( (LCD_WIDTH - (SYSFONT_WIDTH * strlen(msg))) / 2,
(LCD_HEIGHT - SYSFONT_HEIGHT) / 2, msg);
lcd_update();
#if defined(HAVE_RTC_ALARM)
/* Check if the alarm went off while charging */
if(rtc_check_alarm_flag())
{
GSTATUS3=1; /* Normally this is set in crt0.s */
break;
}
#endif
}
if(!(GPGDAT&BUTTON_POWER)
#if defined(HAVE_RTC_ALARM)
&& !GSTATUS3
#endif
)
{
shutdown();
}
}
if(button_hold())
{
const char msg[] = "HOLD is enabled";
reset_screen();
lcd_putsxy( (LCD_WIDTH - (SYSFONT_WIDTH * strlen(msg))) / 2,
(LCD_HEIGHT - SYSFONT_HEIGHT) / 2, msg);
lcd_update();
sleep(2*HZ);
shutdown();
}
}
power_init();
usb_init();
/* Enter USB mode without USB thread */
if(usb_detect() == USB_INSERTED)
{
const char msg[] = "Bootloader USB mode";
reset_screen();
lcd_putsxy( (LCD_WIDTH - (SYSFONT_WIDTH * strlen(msg))) / 2,
(LCD_HEIGHT - SYSFONT_HEIGHT) / 2, msg);
lcd_update();
storage_enable(false);
sleep(HZ/20);
usb_enable(true);
while (usb_detect() == USB_INSERTED)
sleep(HZ);
usb_enable(false);
reset_screen();
lcd_update();
}
reset_screen();
/* Show debug messages if button is pressed */
if(button_read_device()&BUTTON_A)
verbose = true;
printf("Rockbox boot loader");
printf("Version %s", rbversion);
sleep(50); /* ATA seems to error without this pause */
rc = storage_init();
if(rc)
{
reset_screen();
error(EATA, rc, true);
}
filesystem_init();
rc = disk_mount_all();
if (rc<=0)
{
error(EDISK, rc, true);
}
printf("Loading firmware");
/* Flush out anything pending first */
commit_discard_idcache();
loadbuffer = (unsigned char*) 0x31000000;
buffer_size = (unsigned char*)0x31400000 - loadbuffer;
rc = load_firmware(loadbuffer, BOOTFILE, buffer_size);
if(rc <= EFILE_EMPTY)
error(EBOOTFILE, rc, true);
storage_close();
system_prepare_fw_start();
commit_discard_idcache();
kernel_entry = (void*) loadbuffer;
rc = kernel_entry();
#if 0
/* Halt */
while (1)
core_idle();
#else
/* Return and restart */
#endif
}