static void good_dog(void)
{
imx233_rtc_reset_watchdog(WATCHDOG_HW_DELAY * 1000 / HZ); /* ms */
imx233_rtc_enable_watchdog(true);
imx233_timrot_setup_simple(TIMER_WATCHDOG, false, WATCHDOG_SW_DELAY * 1000 / HZ,
TIMER_SRC_1KHZ, &woof_woof);
imx233_timrot_set_priority(TIMER_WATCHDOG, ICOLL_PRIO_WATCHDOG);
}
static void good_dog(void)
{
imx233_rtc_reset_watchdog(WATCHDOG_HW_DELAY * 1000 / HZ); /* ms */
imx233_rtc_enable_watchdog(true);
imx233_timrot_setup(TIMER_WATCHDOG, false, WATCHDOG_SW_DELAY * 1000 / HZ,
BV_TIMROT_TIMCTRLn_SELECT__1KHZ_XTAL, BV_TIMROT_TIMCTRLn_PRESCALE__DIV_BY_1,
false, &woof_woof);
imx233_timrot_set_priority(TIMER_WATCHDOG, ICOLL_PRIO_WATCHDOG);
}
static void woof_woof(void)
{
/* stop hardware watchdog, we catched the error */
imx233_rtc_enable_watchdog(false);
/* recover current PC and trigger abort, so in the hope to get a useful
* backtrace */
uint32_t pc = HW_DIGCTL_SCRATCH0;
UIE(pc, 4);
}
static void woof_woof(void)
{
/* stop hadrware watchdog, we catched the error */
imx233_rtc_enable_watchdog(false);
uint32_t pc = HW_DIGCTL_SCRATCH0;
/* write a "SWI #0xdead" instruction at the faulty instruction so that it
* will trigger a proper backtrace */
*(uint32_t *)pc = 0xef00dead;
commit_discard_idcache();
}
void imx233_system_prepare_shutdown(void)
{
/* wait a bit, useful for the user to stop touching anything */
sleep(HZ / 2);
/* disable watchdog just in case since we will disable interrupts */
imx233_rtc_enable_watchdog(false);
/* disable interrupts, it's probably better to avoid any action so close
* to shutdown */
disable_interrupt(IRQ_FIQ_STATUS);
#ifdef SANSA_FUZEPLUS
/* This pin seems to be important to shutdown the hardware properly */
imx233_pinctrl_acquire(0, 9, "power off");
imx233_pinctrl_set_function(0, 9, PINCTRL_FUNCTION_GPIO);
imx233_pinctrl_enable_gpio(0, 9, true);
imx233_pinctrl_set_gpio(0, 9, true);
#endif
}
void system_exception_wait(void)
{
/* stop hadrware watchdog, IRQs are stopped */
imx233_rtc_enable_watchdog(false);
/* make sure lcd and backlight are on */
lcd_update();
backlight_hw_on();
backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING);
/* wait until button release (if a button is pressed)
* NOTE at this point, interrupts are off so that rules out touchpad and
* ADC, so we are pretty much left with PSWITCH only. If other buttons are
* wanted, it is possible to implement a busy polling version of button
* reading for GPIO and ADC in button-imx233 but this is not done at the
* moment. */
while(imx233_power_read_pswitch() != 0) {}
while(imx233_power_read_pswitch() == 0) {}
while(imx233_power_read_pswitch() != 0) {}
}
void system_exception_wait(void)
{
/* stop hadrware watchdog, IRQs are stopped */
imx233_rtc_enable_watchdog(false);
/* make sure lcd and backlight are on */
lcd_update();
backlight_hw_on();
backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING);
/* wait until button release (if a button is pressed) */
#ifdef HAVE_BUTTON_DATA
int data;
while(button_read_device(&data));
/* then wait until next button press */
while(!button_read_device(&data));
#else
while(button_read_device());
/* then wait until next button press */
while(!button_read_device());
#endif
}
void system_prepare_fw_start(void)
{
/* keep alive to get enough time, stop watchdog */
imx233_keep_alive();
imx233_rtc_enable_watchdog(false);
}
