void udd_attach(void)
{
irqflags_t flags;
flags = cpu_irq_save();
// At startup the USB bus state is unknown,
// therefore the state is considered IDLE to not miss any USB event
udd_sleep_mode(true);
otg_unfreeze_clock();
while (!Is_otg_clock_usable());
// Authorize attach if Vbus is present
udd_attach_device();
// Enable USB line events
udd_enable_reset_interrupt();
udd_enable_suspend_interrupt();
udd_enable_wake_up_interrupt();
udd_enable_sof_interrupt();
// Reset following interrupts flag
udd_ack_reset();
udd_ack_sof();
// The first suspend interrupt must be forced
udd_raise_suspend();
udd_ack_wake_up();
otg_freeze_clock();
cpu_irq_restore(flags);
}
void udd_detach(void)
{
otg_unfreeze_clock();
// Detach device from the bus
udd_detach_device();
otg_freeze_clock();
udd_sleep_mode(false);
}
void udd_attach(void)
{
irqflags_t flags;
flags = cpu_irq_save();
// At startup the USB bus state is unknown,
// therefore the state is considered IDLE to not miss any USB event
udd_sleep_mode(true);
otg_unfreeze_clock();
// This section of clock check can be improved with a chek of
// USB clock source via sysclk()
#if UC3A3
// For parts with high speed feature, the "USABLE" clock is the UTMI clock,
// and the UTMI clock is disabled in suspend mode. Thereby, the utmi clock
// can't be checked when USB line is not attached or in suspend mode
// But it is not a issue, because the clock source is the OSC
#else
// Check USB clock because the source can be a PLL
while( !Is_clock_usable() );
#endif
// Authorize attach if VBus is present
udd_attach_device();
// (RESET_AND_WAKEUP)
// After the attach and the first USB suspend, the following USB Reset time can be inferior to CPU restart clock time.
// Thus, the USB Reset state is not detected and endpoint control is not allocated
// In this case, a Reset is do automatically after attach.
udc_reset(); // Reset USB Device Stack Core
udd_reset_ep_ctrl(); // Reset endpoint control
udd_ctrl_init(); // Reset endpoint control management
// Enable USB line events
udd_enable_reset_interrupt();
udd_enable_suspend_interrupt();
udd_enable_wake_up_interrupt();
#ifdef UDC_SOF_EVENT
udd_enable_sof_interrupt();
#endif
// Reset following interupts flag
udd_ack_reset();
udd_ack_sof();
// The first suspend interrupt must be forced
#if UC3A3
// With UTMI, the first suspend is detected but must be cleared to reoccur interrupt
udd_ack_suspend();
#else
// The first suspend interrupt is not detected else raise it
udd_raise_suspend();
#endif
udd_ack_wake_up();
otg_freeze_clock();
cpu_irq_restore(flags);
}
uint32_t UDD_Init(void)
{
uint32_t i;
for (i = 0; i < MAX_ENDPOINTS; ++i)
{
ul_send_fifo_ptr[i] = 0;
ul_recv_fifo_ptr[i] = 0;
}
// Enables the USB Clock
pmc_enable_periph_clk(ID_UOTGHS);
pmc_enable_upll_clock();
pmc_switch_udpck_to_upllck(0); // div=0+1
pmc_enable_udpck();
// Configure interrupts
NVIC_SetPriority((IRQn_Type) ID_UOTGHS, 0UL);
NVIC_EnableIRQ((IRQn_Type) ID_UOTGHS);
// Always authorize asynchrone USB interrupts to exit from sleep mode
// for SAM3 USB wake up device except BACKUP mode
//pmc_set_fast_startup_input(PMC_FSMR_USBAL);
// ID pin not used then force device mode
otg_disable_id_pin();
otg_force_device_mode();
// Enable USB hardware
otg_disable_pad();
otg_enable_pad();
otg_enable();
otg_unfreeze_clock();
// Check USB clock
//while (!Is_otg_clock_usable())
// ;
// Enable High Speed
udd_low_speed_disable();
udd_high_speed_enable();
//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();
return 0UL ;
}
void udd_attach(void)
{
irqflags_t flags;
flags = cpu_irq_save();
// At startup the USB bus state is unknown,
// therefore the state is considered IDLE to not miss any USB event
udd_sleep_mode(true);
otg_unfreeze_clock();
while( !Is_otg_clock_usable() );
// Authorize attach if Vbus is present
udd_attach_device();
// Enable USB line events
udd_enable_reset_interrupt();
udd_enable_suspend_interrupt();
udd_enable_wake_up_interrupt();
udd_enable_sof_interrupt();
#ifdef USB_DEVICE_HS_SUPPORT
udd_enable_msof_interrupt();
#endif
// Reset following interrupts flag
udd_ack_reset();
udd_ack_sof();
udd_ack_msof();
// The first suspend interrupt must be forced
#if UC3A3
// With UTMI, the first suspend is detected but must be cleared to reoccur interrupt
udd_ack_suspend();
#else
// The first suspend interrupt is not detected else raise it
udd_raise_suspend();
#endif
udd_ack_wake_up();
otg_freeze_clock();
cpu_irq_restore(flags);
}
void udd_disable(void)
{
irqflags_t flags;
#ifdef UHD_ENABLE
# if OTG_ID_IO
if (Is_otg_id_host()) {
// Freeze clock to switch mode
otg_freeze_clock();
udd_detach();
otg_disable();
return; // Host mode running, ignore UDD disable
}
# else
if (Is_otg_host_mode_forced()) {
return; // Host mode running, ignore UDD disable
}
# endif
#endif
flags = cpu_irq_save();
otg_unfreeze_clock();
udd_detach();
#ifndef UDD_NO_SLEEP_MGR
if (udd_b_sleep_initialized) {
udd_b_sleep_initialized = false;
sleepmgr_unlock_mode(UHDP_SLEEP_MODE_USB_SUSPEND);
}
#endif
#ifndef UHD_ENABLE
otg_disable();
sysclk_disable_usb();
pmc_disable_periph_clk(ID_UOTGHS);
#endif
cpu_irq_restore(flags);
}
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;
sysclk_enable_usb();
flags = cpu_irq_save();
//** Enable USB hardware
otg_disable();
(void)Is_otg_enabled();
#ifdef OTG
// Check UID pin state before enter in USB device mode
if (!Is_otg_id_device())
return FALSE;
#else
// Here, only the Device mode is possible, then link USBB interrupt to UDD interrupt
irq_register_handler(udd_interrupt, AVR32_USBB_IRQ, UDD_USB_INT_LEVEL);
otg_force_device_mode();
#endif
otg_disable_pad();
otg_enable_pad();
otg_enable();
otg_unfreeze_clock();
(void)Is_otg_clock_frozen();
#if UC3A3
// For parts with high speed feature, the "USABLE" clock is the UTMI clock,
// and the UTMI clock is disabled in suspend mode. Thereby, the utmi clock
// can't be checked when USB line is not attached or in suspend mode
#else
// Check USB clock
while( !Is_clock_usable() );
#endif
// 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
udd_enable_vbus_interrupt();
otg_freeze_clock();
// Always authorize asynchrone USB interrupts to exit of sleep mode
AVR32_PM.AWEN.usb_waken = 1;
#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
{
#ifdef UDC_SOF_EVENT
if (Is_udd_sof()) {
udd_ack_sof();
UDC_SOF_EVENT();
goto udd_interrupt_end;
}
#endif
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 (0!=USB_DEVICE_MAX_EP)
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_clock_usable() ) {
if(Is_udd_suspend()) break; // In case of USB state change in HS
};
// 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_udd_vbus_transition()) {
// Ack VBus transition and send status to high level
otg_unfreeze_clock();
udd_ack_vbus_transition();
otg_freeze_clock();
#ifdef UDC_VBUS_EVENT
UDC_VBUS_EVENT(Is_udd_vbus_high());
#endif
goto udd_interrupt_end;
}
udd_interrupt_end:
otg_data_memory_barrier();
return;
}
void udd_enable(void)
{
irqflags_t flags;
sysclk_enable_usb();
flags = cpu_irq_save();
//** Enable USB hardware
otg_disable();
(void)Is_otg_enabled();
#ifdef OTG
// Check UID pin state before enter in USB device mode
if (!Is_otg_id_device())
#warning returning bool but the function is void
return FALSE;
#else
// Here, only the Device mode is possible, then link USBC interrupt to UDD interrupt
irq_register_handler(udd_interrupt, AVR32_USBC_IRQ, UDD_USB_INT_LEVEL);
otg_force_device_mode();
#endif
otg_disable_pad();
otg_enable_pad();
otg_enable();
otg_unfreeze_clock();
(void)Is_otg_clock_frozen();
#if 0
// For parts with high speed feature, the "USABLE" clock is the UTMI clock,
// and the UTMI clock is disabled in suspend mode. Thereby, the utmi clock
// can't be checked when USB line is not attached or in suspend mode
#else
// Check USB clock
while( !Is_clock_usable() );
#endif
memset((uint8_t *) udd_g_ep_table, 0, sizeof(udd_g_ep_table));
Usb_set_desc_tab_addr_reg(udd_g_ep_table);
// Reset internal variables
#if (0!=USB_DEVICE_MAX_EP)
{
uint8_t i;
for (i = 0; i < USB_DEVICE_MAX_EP; i++) {
udd_ep_job[i].busy = false;
}
}
#endif
// Set the USB speed requested by configuration file
#ifdef USB_DEVICE_LOW_SPEED
udd_low_speed_enable();
#else
udd_low_speed_disable();
#endif
# ifdef USB_DEVICE_HS_SUPPORT
udd_high_speed_enable();
# else
udd_high_speed_disable();
# endif
udd_enable_vbus_interrupt();
otg_freeze_clock();
// Always authorize asynchronous USB interrupts to exit from sleep mode
#if(!defined AVR32_PM_WITHOUT_AWEN)
AVR32_PM.awen |= AVR32_PM_AWEN_USBCWEN_MASK;
#endif
#ifndef UDD_NO_SLEEP_MGR
// Initialize the sleep mode authorized for the USB suspend mode
udd_b_idle = false;
sleepmgr_lock_mode(USBC_SLEEP_MODE_USB_SUSPEND);
#endif
cpu_irq_restore(flags);
}