/**
* USB VBus pin change handler
*/
static void udd_vbus_handler(uint32_t id, uint32_t mask)
{
if (USB_VBUS_PIO_ID != id || USB_VBUS_PIO_MASK != mask) {
return;
}
/* PIO interrupt status has been cleared, just detect level */
bool b_vbus_high = Is_otg_vbus_high();
if (b_vbus_high) {
udd_vbus_monitor_sleep_mode(false);
udd_attach();
} else {
udd_vbus_monitor_sleep_mode(true);
udd_detach();
}
UDC_VBUS_EVENT(b_vbus_high);
}
void udd_enable(void)
{
irqflags_t flags;
flags = cpu_irq_save();
#ifdef UHD_ENABLE
//* DUAL ROLE INITIALIZATION
if (otg_dual_enable()) {
// The current mode has been started by otg_dual_enable()
cpu_irq_restore(flags);
return;
}
#else
//* SINGLE DEVICE MODE INITIALIZATION
sysclk_enable_usb();
// Here, only the device mode is possible, then link USBB interrupt to UDD interrupt
irq_register_handler(
#ifdef FREERTOS_USED
(__int_handler)
#endif
udd_interrupt, AVR32_USBB_IRQ, UDD_USB_INT_LEVEL);
// Always authorize asynchronous USB interrupts to exit of sleep mode
pm_asyn_wake_up_enable(AVR32_PM_AWEN_USB_WAKEN_MASK);
#endif
# if (defined USB_ID) && (defined UHD_ENABLE)
// Check that the device mode is selected by ID pin
if (!Is_otg_id_device()) {
cpu_irq_restore(flags);
return; // Device is not the current mode
}
# else
// ID pin not used then force device mode
otg_disable_id_pin();
otg_force_device_mode();
# endif
// Enable USB hardware
otg_enable_pad();
otg_enable();
otg_unfreeze_clock();
(void)Is_otg_clock_frozen();
// Reset internal variables
#if (0!=USB_DEVICE_MAX_EP)
udd_ep_job_table_reset();
#endif
// Set the USB speed requested by configuration file
#ifdef USB_DEVICE_LOW_SPEED
udd_low_speed_enable();
#else
udd_low_speed_disable();
# ifdef USB_DEVICE_HS_SUPPORT
udd_high_speed_enable();
# else
udd_high_speed_disable();
# endif
#endif
otg_ack_vbus_transition();
// Force Vbus interrupt in case of Vbus always with a high level
// This is possible with a short timing between a Host mode stop/start.
if (Is_otg_vbus_high()) {
otg_raise_vbus_transition();
}
otg_enable_vbus_interrupt();
otg_freeze_clock();
#ifndef UDD_NO_SLEEP_MGR
// Initialize the sleep mode authorized for the USB suspend mode
udd_b_idle = false;
sleepmgr_lock_mode(USBB_SLEEP_MODE_USB_SUSPEND);
#endif
cpu_irq_restore(flags);
}
ISR(udd_interrupt, AVR32_USBB_IRQ_GROUP, UDD_USB_INT_LEVEL)
# endif
#endif
{
if (Is_udd_sof()) {
udd_ack_sof();
if (Is_udd_full_speed_mode()) {
udc_sof_notify();
}
#ifdef UDC_SOF_EVENT
UDC_SOF_EVENT();
#endif
goto udd_interrupt_end;
}
if (Is_udd_msof()) {
udd_ack_msof();
udc_sof_notify();
goto udd_interrupt_end;
}
if (udd_ctrl_interrupt())
goto udd_interrupt_end; // Interrupt acked by control endpoint managed
#if (0 != USB_DEVICE_MAX_EP)
if (udd_ep_interrupt())
goto udd_interrupt_end; // Interrupt acked by bulk/interrupt/isochronous endpoint managed
#endif
// USB bus reset detection
if (Is_udd_reset()) {
udd_ack_reset();
// Abort all jobs on-going
#if (USB_DEVICE_MAX_EP != 0)
udd_ep_job_table_kill();
#endif
// Reset USB Device Stack Core
udc_reset();
// Reset endpoint control
udd_reset_ep_ctrl();
// Reset endpoint control management
udd_ctrl_init();
goto udd_interrupt_end;
}
if (Is_udd_suspend_interrupt_enabled() && Is_udd_suspend()) {
otg_unfreeze_clock();
// The suspend interrupt is automatic acked when a wakeup occur
udd_disable_suspend_interrupt();
udd_enable_wake_up_interrupt();
otg_freeze_clock(); // Mandatory to exit of sleep mode after a wakeup event
udd_sleep_mode(false); // Enter in SUSPEND mode
#ifdef UDC_SUSPEND_EVENT
UDC_SUSPEND_EVENT();
#endif
goto udd_interrupt_end;
}
if (Is_udd_wake_up_interrupt_enabled() && Is_udd_wake_up()) {
// Ack wakeup interrupt and enable suspend interrupt
otg_unfreeze_clock();
// Check USB clock ready after suspend and eventually sleep USB clock
while( !Is_otg_clock_usable() );
// The wakeup interrupt is automatic acked when a suspend occur
udd_disable_wake_up_interrupt();
udd_enable_suspend_interrupt();
udd_sleep_mode(true); // Enter in IDLE mode
#ifdef UDC_RESUME_EVENT
UDC_RESUME_EVENT();
#endif
goto udd_interrupt_end;
}
if (Is_otg_vbus_transition()) {
// Ack Vbus transition and send status to high level
otg_unfreeze_clock();
otg_ack_vbus_transition();
otg_freeze_clock();
#ifndef USB_DEVICE_ATTACH_AUTO_DISABLE
if (Is_otg_vbus_high()) {
udd_attach();
} else {
udd_detach();
}
#endif
#ifdef UDC_VBUS_EVENT
UDC_VBUS_EVENT(Is_otg_vbus_high());
#endif
goto udd_interrupt_end;
}
udd_interrupt_end:
otg_data_memory_barrier();
#if (defined FREERTOS_USED)
// Since we do not know if the user callbacks have used or not FreeRTOS APIs, let's
// consider that exiting from the USB interrupt will require a context switch.
return pdTRUE;
#else
return;
#endif
}
void udd_enable(void)
{
irqflags_t flags;
flags = cpu_irq_save();
#ifdef UHD_ENABLE
// DUAL ROLE INITIALIZATION
if (otg_dual_enable()) {
// The current mode has been started by otg_dual_enable()
cpu_irq_restore(flags);
return;
}
#else
// SINGLE DEVICE MODE INITIALIZATION
sysclk_enable_usb();
pmc_enable_periph_clk(ID_UOTGHS);
// Here, only the device mode is possible, then link UHDP interrupt to UDD interrupt
NVIC_SetPriority((IRQn_Type) ID_UOTGHS, USB_INT_LEVEL);
NVIC_EnableIRQ((IRQn_Type) ID_UOTGHS);
// Always authorize asynchrony USB interrupts to exit of sleep mode
// For SAM USB wake up device except BACKUP mode
pmc_set_fast_startup_input(PMC_FSMR_USBAL);
#endif
#if (OTG_ID_IO) && (defined UHD_ENABLE)
// Check that the device mode is selected by ID pin
if (!Is_otg_id_device()) {
cpu_irq_restore(flags);
return; // Device is not the current mode
}
#else
// ID pin not used and force device mode
otg_force_device_mode();
#endif
// Enable USB hardware
otg_enable();
// Reset internal variables
#if (0!=USB_DEVICE_MAX_EP)
udd_ep_job_table_reset();
#endif
#ifndef UDD_NO_SLEEP_MGR
if (!udd_b_sleep_initialized) {
udd_b_sleep_initialized = true;
// Initialize the sleep mode authorized for the USB suspend mode
udd_b_idle = false;
sleepmgr_lock_mode(UHDP_SLEEP_MODE_USB_SUSPEND);
} else {
udd_sleep_mode(false); // Enter idle mode
}
#endif
#if OTG_VBUS_IO
/* Initialize VBus monitor */
otg_vbus_init(udd_vbus_handler);
udd_vbus_monitor_sleep_mode(true);
/* Force VBus interrupt when VBus is always high
* This is possible due to a short timing between a Host mode stop/start.
*/
if (Is_otg_vbus_high()) {
udd_vbus_handler(USB_VBUS_PIO_ID, USB_VBUS_PIO_MASK);
}
#else
# ifndef USB_DEVICE_ATTACH_AUTO_DISABLE
udd_attach();
# endif
#endif
cpu_irq_restore(flags);
}
ISR(udd_interrupt, AVR32_USBB_IRQ_GROUP, UDD_USB_INT_LEVEL)
# endif
#endif
{
if (Is_udd_sof()) {
udd_ack_sof();
if (Is_udd_full_speed_mode()) {
udc_sof_notify();
}
#ifdef UDC_SOF_EVENT
UDC_SOF_EVENT();
#endif
goto udd_interrupt_end;
}
if (Is_udd_msof()) {
udd_ack_msof();
udc_sof_notify();
goto udd_interrupt_end;
}
if (udd_ctrl_interrupt())
goto udd_interrupt_end; // Interrupt acked by control endpoint managed
#if (0 != USB_DEVICE_MAX_EP)
if (udd_ep_interrupt())
goto udd_interrupt_end; // Interrupt acked by bulk/interrupt/isochronous endpoint managed
#endif
// USB bus reset detection
if (Is_udd_reset()) {
udd_ack_reset();
// Abort all jobs on-going
#if (USB_DEVICE_MAX_EP != 0)
udd_ep_job_table_kill();
#endif
// Reset USB Device Stack Core
udc_reset();
// Reset endpoint control
udd_reset_ep_ctrl();
// Reset endpoint control management
udd_ctrl_init();
goto udd_interrupt_end;
}
if (Is_udd_suspend_interrupt_enabled() && Is_udd_suspend()) {
otg_unfreeze_clock();
// The suspend interrupt is automatic acked when a wakeup occur
udd_disable_suspend_interrupt();
udd_enable_wake_up_interrupt();
otg_freeze_clock(); // Mandatory to exit of sleep mode after a wakeup event
udd_sleep_mode(false); // Enter in SUSPEND mode
#ifdef UDC_SUSPEND_EVENT
UDC_SUSPEND_EVENT();
#endif
goto udd_interrupt_end;
}
if (Is_udd_wake_up_interrupt_enabled() && Is_udd_wake_up()) {
// Ack wakeup interrupt and enable suspend interrupt
otg_unfreeze_clock();
// Check USB clock ready after suspend and eventually sleep USB clock
while( !Is_otg_clock_usable() );
// The wakeup interrupt is automatic acked when a suspend occur
udd_disable_wake_up_interrupt();
udd_enable_suspend_interrupt();
udd_sleep_mode(true); // Enter in IDLE mode
#ifdef UDC_RESUME_EVENT
UDC_RESUME_EVENT();
#endif
goto udd_interrupt_end;
}
if (Is_otg_vbus_transition()) {
// Ack Vbus transition and send status to high level
otg_unfreeze_clock();
otg_ack_vbus_transition();
otg_freeze_clock();
#ifdef UDC_VBUS_EVENT
UDC_VBUS_EVENT(Is_otg_vbus_high());
#endif
goto udd_interrupt_end;
}
udd_interrupt_end:
otg_data_memory_barrier();
return;
}