USBHS OTG Driver

USBHS low-level driver for OTG features.

Macros
#define	USB_INT_LEVEL   5
	USB interrupt level By default USB interrupt have low priority. More...

Functions
void	otg_dual_disable (void)
	Uninitialize the dual role This function is implemented in usbhs_host.c file. More...
bool	otg_dual_enable (void)
	Initialize the dual role This function is implemented in usbhs_host.c file. More...

USBHS OTG ID pin management
The ID pin come from the USB OTG connector (A and B receptacle) and allows to select the USB mode host or device. The ID pin can be managed through PIO pin. This feature is optional, and it is enabled if USB_ID_PIN is defined in board.h and CONF_BOARD_USB_ID_DETECT defined in conf_board.h.
#define	OTG_ID_DETECT
#define	OTG_ID_IO   (defined(USB_ID_PIN) && OTG_ID_DETECT)
#define	otg_id_init(handler)
#define	otg_id_interrupt_enable()   pio_enable_pin_interrupt(USB_ID_PIN)
#define	otg_id_interrupt_disable()   pio_disable_pin_interrupt(USB_ID_PIN)
#define	Is_otg_id_device()   ioport_get_pin_level(USB_ID_PIN)
#define	Is_otg_id_host()   (!Is_otg_id_device())
#define	otg_force_device_mode()   (Set_bits(USBHS->USBHS_CTRL, USBHS_CTRL_UIMOD))
#define	Is_otg_device_mode_forced()   (Tst_bits(USBHS->USBHS_CTRL, USBHS_CTRL_UIMOD))
	Test if device mode is forced. More...
#define	otg_force_host_mode()   (Clr_bits(USBHS->USBHS_CTRL, USBHS_CTRL_UIMOD))
	Disable external OTG_ID pin and force host mode. More...
#define	Is_otg_host_mode_forced()   (!Tst_bits(USBHS->USBHS_CTRL, USBHS_CTRL_UIMOD))
	Test if host mode is forced. More...

USBHS OTG VBUS pin management
USBHS peripheral does not support VBUS management and it's monitored by a PIO pin. This feature is optional, and it is enabled if USB_VBUS_PIN is defined in board.h and CONF_BOARD_USB_VBUS_DETECT defined in conf_board.h. Note ioport_init() must be invoked before using VBus pin functions since they use IOPORT API, See Also Common IOPORT API.
#define	OTG_VBUS_DETECT
#define	OTG_VBUS_IO   (defined(USB_VBUS_PIN) && OTG_VBUS_DETECT)
#define	USB_VBUS_WKUP   0
#define	otg_vbus_init(handler)
#define	Is_otg_vbus_high()   ioport_get_pin_level(USB_VBUS_PIN)
#define	Is_otg_vbus_low()   (!Is_otg_vbus_high())
#define	otg_enable_vbus_interrupt()   pio_enable_pin_interrupt(USB_VBUS_PIN)
#define	otg_disable_vbus_interrupt()   pio_disable_pin_interrupt(USB_VBUS_PIN)

USBHS OTG main management
These macros allows to enable/disable pad and USBHS hardware
#define	otg_reset()
	Reset USB macro. More...
#define	otg_enable()   (Set_bits(USBHS->USBHS_CTRL, USBHS_CTRL_USBE))
	Enable USB macro. More...
#define	otg_disable()   (Clr_bits(USBHS->USBHS_CTRL, USBHS_CTRL_USBE))
	Disable USB macro. More...
#define	Is_otg_enabled()   (Tst_bits(USBHS->USBHS_CTRL, USBHS_CTRL_USBE))
#define	Is_otg_clock_usable()   (Tst_bits(USBHS->USBHS_SR, USBHS_SR_CLKUSABLE))
	Check Clock Usable. More...
#define	otg_freeze_clock()   (Set_bits(USBHS->USBHS_CTRL, USBHS_CTRL_FRZCLK))
	Stop (freeze) internal USB clock. More...
#define	otg_unfreeze_clock()   (Clr_bits(USBHS->USBHS_CTRL, USBHS_CTRL_FRZCLK))
#define	Is_otg_clock_frozen()   (Tst_bits(USBHS->USBHS_CTRL, USBHS_CTRL_FRZCLK))
#define	otg_enable_rderr_interrupt()   (Set_bits(USBHS->USBHS_CTRL, USBHS_CTRL_RDERRE))
	Enables RDERR interrupt. More...
#define	otg_disable_rderr_interrupt()   (Clr_bits(USBHS->USBHS_CTRL, USBHS_CTRL_RDERRE))
	Disables RDERR interrupt. More...
#define	Is_otg_rderr_interrupt_enabled()   (Tst_bits(USBHS->USBHS_CTRL, USBHS_CTRL_RDERRE))
#define	otg_ack_rderr_interrupt()   (USBHS->USBHS_SCR = USBHS_SCR_RDERRIC)
	ACKs RDERR interrupt. More...
#define	otg_raise_rderr_interrupt()   (USBHS->USBHS_SFR = USBHS_SFR_RDERRIS)
	Raises RDERR interrupt. More...
#define	Is_otg_rderr_interrupt()   (Tst_bits(USBHS->USBHS_SR, USBHS_SR_RDERRI))
	Tests if a RDERR occurs. More...

#define Is_otg_clock_frozen

(

)

(Tst_bits(USBHS->USBHS_CTRL, USBHS_CTRL_FRZCLK))

#define Is_otg_clock_usable

(

)

(Tst_bits(USBHS->USBHS_SR, USBHS_SR_CLKUSABLE))

Check Clock Usable.

For parts with HS feature, this one corresponding at UTMI clock

Referenced by udd_attach(), udd_enable(), udd_interrupt(), uhd_disable(), uhd_enable(), uhd_interrupt(), and uhd_resume().

#define Is_otg_device_mode_forced

(

)

(Tst_bits(USBHS->USBHS_CTRL, USBHS_CTRL_UIMOD))

Test if device mode is forced.

Referenced by ISR().

#define Is_otg_enabled

(

)

(Tst_bits(USBHS->USBHS_CTRL, USBHS_CTRL_USBE))

#define Is_otg_host_mode_forced

(

)

(!Tst_bits(USBHS->USBHS_CTRL, USBHS_CTRL_UIMOD))

Test if host mode is forced.

Referenced by udd_disable().

#define Is_otg_id_device

(

)

ioport_get_pin_level(USB_ID_PIN)

Referenced by otg_dual_enable(), otg_id_handler(), udd_enable(), and uhd_enable().

#define Is_otg_id_host

(

)

(!Is_otg_id_device())

Referenced by udd_disable().

#define Is_otg_rderr_interrupt

(

)

(Tst_bits(USBHS->USBHS_SR, USBHS_SR_RDERRI))

Tests if a RDERR occurs.

#define Is_otg_rderr_interrupt_enabled

(

)

(Tst_bits(USBHS->USBHS_CTRL, USBHS_CTRL_RDERRE))

#define Is_otg_vbus_high

(

)

ioport_get_pin_level(USB_VBUS_PIN)

Referenced by udd_enable(), uhd_enable(), and uhd_vbus_handler().

#define Is_otg_vbus_low

(

)

(!Is_otg_vbus_high())

#define otg_ack_rderr_interrupt

(

)

(USBHS->USBHS_SCR = USBHS_SCR_RDERRIC)

ACKs RDERR interrupt.

#define otg_disable

(

)

(Clr_bits(USBHS->USBHS_CTRL, USBHS_CTRL_USBE))

Disable USB macro.

Referenced by otg_dual_disable(), udd_disable(), and uhd_disable().

#define otg_disable_rderr_interrupt

(

)

(Clr_bits(USBHS->USBHS_CTRL, USBHS_CTRL_RDERRE))

Disables RDERR interrupt.

#define otg_disable_vbus_interrupt

(

)

pio_disable_pin_interrupt(USB_VBUS_PIN)

#define otg_enable

(

)

(Set_bits(USBHS->USBHS_CTRL, USBHS_CTRL_USBE))

Enable USB macro.

Referenced by udd_enable(), and uhd_enable().

#define otg_enable_rderr_interrupt

(

)

(Set_bits(USBHS->USBHS_CTRL, USBHS_CTRL_RDERRE))

Enables RDERR interrupt.

#define otg_enable_vbus_interrupt

(

)

pio_enable_pin_interrupt(USB_VBUS_PIN)

#define otg_force_device_mode

(

)

(Set_bits(USBHS->USBHS_CTRL, USBHS_CTRL_UIMOD))

#define otg_force_host_mode

(

)

(Clr_bits(USBHS->USBHS_CTRL, USBHS_CTRL_UIMOD))

Disable external OTG_ID pin and force host mode.

Referenced by otg_dual_enable(), otg_id_handler(), and uhd_enable().

#define otg_freeze_clock

(

)

(Set_bits(USBHS->USBHS_CTRL, USBHS_CTRL_FRZCLK))

Stop (freeze) internal USB clock.

Referenced by otg_dual_disable(), udd_attach(), udd_detach(), udd_disable(), udd_enable(), udd_interrupt(), uhd_delayed_suspend(), uhd_disable(), and uhd_vbus_handler().

#define OTG_ID_DETECT

Value:

(defined(CONF_BOARD_USB_PORT) && \
    defined(CONF_BOARD_USB_ID_DETECT))

#define otg_id_init

(

handler

)

Value:

otg_io_pin_init(USB_ID_PIN, USB_ID_FLAGS, \
            USB_ID_PIN_IRQn, USB_INT_LEVEL, handler, false)

Referenced by otg_dual_enable().

#define otg_id_interrupt_disable

(

)

pio_disable_pin_interrupt(USB_ID_PIN)

Referenced by otg_dual_disable().

#define otg_id_interrupt_enable

(

)

pio_enable_pin_interrupt(USB_ID_PIN)

#define OTG_ID_IO   (defined(USB_ID_PIN) && OTG_ID_DETECT)

#define otg_raise_rderr_interrupt

(

)

(USBHS->USBHS_SFR = USBHS_SFR_RDERRIS)

Raises RDERR interrupt.

#define otg_reset

(

)

Value:

do {                                    \
        USBHS->USBHS_CTRL = 0;            \
        while( USBHS->USBHS_SR & 0x3FFF) {\
            USBHS->USBHS_SCR = 0xFFFFFFFF;\
        }                                   \
    } while (0)

Reset USB macro.

#define otg_unfreeze_clock

(

)

(Clr_bits(USBHS->USBHS_CTRL, USBHS_CTRL_FRZCLK))

Referenced by otg_dual_disable(), udd_attach(), udd_detach(), udd_disable(), udd_enable(), udd_interrupt(), udd_send_remotewakeup(), uhd_disable(), uhd_enable(), uhd_resume(), and uhd_vbus_handler().

#define OTG_VBUS_DETECT

Value:

(defined(CONF_BOARD_USB_PORT) && \
    defined(CONF_BOARD_USB_VBUS_DETECT))

#define otg_vbus_init

(

handler

)

Value:

otg_io_pin_init(USB_VBUS_PIN, USB_VBUS_FLAGS, \
  USB_VBUS_PIN_IRQn, USB_INT_LEVEL, handler, USB_VBUS_WKUP)

Referenced by udd_enable(), and uhd_enable().

#define OTG_VBUS_IO   (defined(USB_VBUS_PIN) && OTG_VBUS_DETECT)

#define USB_INT_LEVEL   5

USB interrupt level By default USB interrupt have low priority.

#define USB_VBUS_WKUP   0

void otg_dual_disable

(

void

)

Uninitialize the dual role This function is implemented in usbhs_host.c file.

References otg_disable, otg_freeze_clock, otg_id_interrupt_disable, otg_unfreeze_clock, pmc_clr_fast_startup_input(), pmc_disable_periph_clk(), sysclk_disable_usb(), uhd_sleep_mode(), and UHD_STATE_OFF.

Referenced by uhd_disable().

bool otg_dual_enable

(

void

)

Initialize the dual role This function is implemented in usbhs_host.c file.

Returns

true if the ID pin management has been started, otherwise false.

References Is_otg_id_device, otg_force_host_mode, otg_id_handler(), otg_id_init, pmc_enable_periph_clk(), pmc_set_fast_startup_input(), sysclk_enable_usb(), udc_start(), UHC_MODE_CHANGE, uhc_start(), uhd_sleep_mode(), UHD_STATE_OFF, UHD_STATE_WAIT_ID_HOST, and UHD_USB_INT_LEVEL.

Referenced by udd_enable(), and uhd_enable().