Implementation of UHC

Internal implementation.

Functions
static void	uhc_remotewakeup (bool b_enable)
	Enables or disables the remote wakeup feature of all devices connected. More...
static void	uhc_request_bos_desc (uint16_t length, const uhd_callback_setup_end_t callback)
	Requests the USB structure of the USB BOS descriptor. More...
static void	uhc_setup_request_callback (usb_add_t add, uhd_trans_status_t status, uint16_t payload_trans)
	Callback used to signal the end of a setup request. More...

Internal variables to manage the USB host stack
typedef void(*	uhc_sof_timeout_callback_t )(void)
	Type of callback on a SOF timeout. More...
static uhc_device_t	g_uhc_device_root
	Entry point of all devices connected on USB tree. More...
static uint8_t	uhc_enum_try
	Number of enumeration try. More...
static uhc_sof_timeout_callback_t	uhc_sof_timeout_callback
	Callback currently registered on a SOF timeout. More...
uint8_t	uhc_sof_timeout
	Number of SOF remaining before call uhc_sof_timeout_callback callback. More...
static uhi_api_t	uhc_uhis [] = {USB_HOST_UHI}
	Array of all UHI available. More...
static volatile bool	uhc_setup_request_finish
	Volatile flag to pool the end of Get USB string setup request. More...
static volatile bool	uhc_setup_request_finish_status
	Volatile flag to know the status of Get USB string setup request. More...
#define	UHC_ENUM_NB_TRY   4
	Maximum try to enumerate a device. More...
#define	UHC_USB_ADD_NOT_VALID   0xFF
	Entry point of all devices connected on USB tree. More...
#define	UHC_DEVICE_ENUM_ADD   1
	USB address of the USB device under enumeration process. More...
#define	uhc_dev_enum   (&g_uhc_device_root)
	Device under enumeration process. More...
#define	uhc_power_running   0
	Total power of the devices connected. More...
#define	UHC_NB_UHI   (sizeof(uhc_uhis)/sizeof(uhc_uhis[0]))
	Number of UHI available. More...

Internal functions to manage the USB device enumeration
static void	uhc_enable_timeout_callback (uint8_t timeout, uhc_sof_timeout_callback_t callback)
	Enable a internal timeout on SOF events. More...
static void	uhc_enumeration_suspend (void)
	Enters a specific device in USB suspend mode Suspend the USB line or a port on USB hub. More...
static void	uhc_enumeration_reset (uhd_callback_reset_t callback)
	Sends the USB Reset signal on the USB line of a device. More...
static void	uhc_connection_tree (bool b_plug, uhc_device_t *dev)
	Manage a device plug or unplug on the USB tree. More...
static void	uhc_enumeration_step1 (void)
	Device enumeration step 1 Reset USB line. More...
static void	uhc_enumeration_step2 (void)
	Device enumeration step 2 Lets USB line in IDLE state during 20ms. More...
static void	uhc_enumeration_step3 (void)
	Device enumeration step 3 Reset USB line. More...
static void	uhc_enumeration_step4 (void)
	Device enumeration step 4 Lets USB line in IDLE state during 100ms. More...
static void	uhc_enumeration_step5 (void)
	Device enumeration step 5 Requests the USB device descriptor. More...
static void	uhc_enumeration_step6 (usb_add_t add, uhd_trans_status_t status, uint16_t payload_trans)
	Device enumeration step 6 End of Get device descriptor request. More...
static void	uhc_enumeration_step7 (void)
	Device enumeration step 7 Reset USB line. More...
static void	uhc_enumeration_step8 (void)
	Device enumeration step 8 Lets USB line in IDLE state during 100ms. More...
static void	uhc_enumeration_step9 (void)
	Device enumeration step 9 Send a Set address setup request. More...
static void	uhc_enumeration_step10 (usb_add_t add, uhd_trans_status_t status, uint16_t payload_trans)
	Device enumeration step 10 End of Set address request. More...
static void	uhc_enumeration_step11 (void)
	Device enumeration step 11 Updates USB host pipe with the new USB address. More...
static void	uhc_enumeration_step12 (usb_add_t add, uhd_trans_status_t status, uint16_t payload_trans)
	Device enumeration step 12 Requests the first USB structure of the USB configuration descriptor. More...
static void	uhc_enumeration_step13 (usb_add_t add, uhd_trans_status_t status, uint16_t payload_trans)
	Device enumeration step 13 Requests a complete Get configuration descriptor. More...
static void	uhc_enumeration_step14 (usb_add_t add, uhd_trans_status_t status, uint16_t payload_trans)
	Device enumeration step 14 Enable USB configuration, if unless one USB interface is supported by UHIs. More...
static void	uhc_enumeration_step15 (usb_add_t add, uhd_trans_status_t status, uint16_t payload_trans)
	Device enumeration step 15 Enables UHI interfaces. More...
static void	uhc_enumeration_step16_lpm (void)
	Device enumeration step 16 (LPM only) Requests first part of the USB BOS descriptor. More...
static void	uhc_enumeration_step17_lpm (usb_add_t add, uhd_trans_status_t status, uint16_t payload_trans)
	Device enumeration step 17 (LPM only) Check LPM support through the BOS descriptor received and request the whole BOS descriptor. More...
static void	uhc_enumeration_step18_lpm (usb_add_t add, uhd_trans_status_t status, uint16_t payload_trans)
	Device enumeration step 18 (LPM only) Check LPM support through the BOS descriptor received. More...
static void	uhc_enumeration_error (uhc_enum_status_t status)
	Manage error during device enumeration. More...

Callbacks used by USB Host Driver (UHD) to notify events
void	uhc_notify_connection (bool b_plug)
	Notify device connection or disconnection. More...
void	uhc_notify_sof (bool b_micro)
	Notify each start of frame sent by driver. More...
void	uhc_notify_resume (void)
	Notify that a resume bus occurs A resume can occur after a downstream or an upstream resume. More...
void	uhc_notify_resume_lpm (void)
	Notify that a resume bus occurs after a L1 state A resume can occur after a downstream or an upstream resume. More...

Functions to control the USB host stack
void	uhc_start (void)
	Starts the host mode. More...
void	uhc_stop (bool b_id_stop)
	Stops the host mode. More...
void	uhc_suspend (bool b_remotewakeup)
	Suspends a USB line. More...
bool	uhc_is_suspend (void)
	Test if the suspend state is enabled on the USB line. More...
void	uhc_resume (void)
	Resumes the USB line. More...
bool	uhc_suspend_lpm (bool b_remotewakeup, uint8_t hird)
	Suspends a USB line through LPM feature. More...

User functions to manage the devices
uint8_t	uhc_get_device_number (void)
	Returns the number of connected devices. More...
char *	uhc_dev_get_string_manufacturer (uhc_device_t *dev)
	Gets the USB string manufacturer from a USB device. More...
char *	uhc_dev_get_string_product (uhc_device_t *dev)
	Gets the USB string product from a USB device. More...
char *	uhc_dev_get_string_serial (uhc_device_t *dev)
	Gets the USB string serial from a USB device. More...
char *	uhc_dev_get_string (uhc_device_t *dev, uint8_t str_id)
	Gets a USB string from a USB device. More...
uint16_t	uhc_dev_get_power (uhc_device_t *dev)
	Gets the maximum consumption of a device (mA) More...
uhd_speed_t	uhc_dev_get_speed (uhc_device_t *dev)
	Returns the current device speed. More...
bool	uhc_dev_is_high_speed_support (uhc_device_t *dev)
	Tests if the device supports the USB high speed This function can wait the end of a setup request and the timing can be long (1ms to 5s). More...
void	uhc_dev_reset (uhc_device_t *dev)
	Reset to re-enumerate. More...

#define uhc_dev_enum   (&g_uhc_device_root)

Device under enumeration process.

Referenced by uhc_enumeration_step13().

#define UHC_DEVICE_ENUM_ADD   1

USB address of the USB device under enumeration process.

Referenced by uhc_enumeration_step11(), uhc_enumeration_step12(), uhc_enumeration_step13(), uhc_enumeration_step14(), uhc_enumeration_step9(), and uhc_request_bos_desc().

#define UHC_ENUM_NB_TRY   4

Maximum try to enumerate a device.

Referenced by uhc_enumeration_error().

#define UHC_NB_UHI   (sizeof(uhc_uhis)/sizeof(uhc_uhis[0]))

Number of UHI available.

Referenced by uhc_connection_tree(), uhc_dev_reset(), uhc_enumeration_step14(), uhc_enumeration_step15(), and uhc_notify_sof().

#define uhc_power_running   0

Total power of the devices connected.

Referenced by uhc_connection_tree(), uhc_enumeration_step13(), and uhc_notify_connection().

#define UHC_USB_ADD_NOT_VALID   0xFF

Entry point of all devices connected on USB tree.

Referenced by uhc_connection_tree(), uhc_get_device_number(), uhc_is_suspend(), uhc_notify_connection(), and uhc_start().

typedef void(* uhc_sof_timeout_callback_t)(void)

Type of callback on a SOF timeout.

static void uhc_connection_tree ( bool  b_plug, uhc_device_t *  dev  )

static

Manage a device plug or unplug on the USB tree.

Parameters

b_plug	true, if it is a device connection
dev	Information about device connected or disconnected

References uhc_device_t::address, uhc_device_t::conf_desc, dev, UHC_CONNECTION_EVENT, uhc_enum_try, uhc_enumeration_step1(), UHC_NB_UHI, uhc_power_running, uhc_sof_timeout, UHC_USB_ADD_NOT_VALID, uhd_ep_free(), and uhi_api_t::uninstall.

Referenced by uhc_notify_connection().

uint16_t uhc_dev_get_power

(

uhc_device_t *

dev

)

Gets the maximum consumption of a device (mA)

Parameters

dev	Device to request

Returns

Maximum consumption of the device (mA)

References usb_conf_desc_t::bMaxPower, and uhc_device_t::conf_desc.

uhd_speed_t uhc_dev_get_speed

(

uhc_device_t *

dev

)

Returns the current device speed.

Parameters

dev	Device to request

Returns

Device speed

References uhc_device_t::speed.

char* uhc_dev_get_string	(	uhc_device_t *	dev,
		uint8_t	str_id
	)

Gets a USB string from a USB device.

This function waits the end of setup requests and the timing can be long (3ms to 15s). Thus, do not call it in an interrupt routine. This function allocates a buffer which must be free by user application.

Parameters

dev	Device to request
str_id	String ID requested

Returns

Pointer on unicode string, or NULL if function fails.

References usb_str_desc_t::bLength, usb_setup_req_t::bmRequestType, usb_setup_req_t::bRequest, le16_to_cpu, usb_str_lgid_desc_t::string, uhc_setup_request_callback(), uhc_setup_request_finish, uhc_setup_request_finish_status, uhd_setup_request(), UNUSED, USB_DT_STRING, USB_REQ_DIR_IN, USB_REQ_GET_DESCRIPTOR, USB_REQ_RECIP_DEVICE, USB_REQ_TYPE_STANDARD, usb_setup_req_t::wIndex, usb_setup_req_t::wLength, and usb_setup_req_t::wValue.

Referenced by uhc_dev_get_string_manufacturer(), uhc_dev_get_string_product(), and uhc_dev_get_string_serial().

char* uhc_dev_get_string_manufacturer

(

uhc_device_t *

dev

)

Gets the USB string manufacturer from a USB device.

This function waits the end of setup requests and the timing can be long (3ms to 15s). Thus, do not call it in an interrupt routine. This function allocates a buffer which must be free by user application.

Parameters

dev	Device to request

Returns

Pointer on unicode string, or NULL if function fails.

References uhc_device_t::dev_desc, usb_dev_desc_t::iManufacturer, and uhc_dev_get_string().

char* uhc_dev_get_string_product

(

uhc_device_t *

dev

)

Gets the USB string product from a USB device.

This function waits the end of setup requests and the timing can be long (3ms to 15s). Thus, do not call it in an interrupt routine. This function allocates a buffer which must be free by user application.

Parameters

dev	Device to request

Returns

Pointer on unicode string, or NULL if function fails.

References uhc_device_t::dev_desc, usb_dev_desc_t::iProduct, and uhc_dev_get_string().

char* uhc_dev_get_string_serial

(

uhc_device_t *

dev

)

Gets the USB string serial from a USB device.

This function waits the end of setup requests and the timing can be long (3ms to 15s). Thus, do not call it in an interrupt routine. This function allocates a buffer which must be free by user application.

Parameters

dev	Device to request

Returns

Pointer on unicode string, or NULL if function fails.

References uhc_device_t::dev_desc, usb_dev_desc_t::iSerialNumber, and uhc_dev_get_string().

bool uhc_dev_is_high_speed_support

(

uhc_device_t *

dev

)

Tests if the device supports the USB high speed This function can wait the end of a setup request and the timing can be long (1ms to 5s).

Thus, do not call it in an interrupt routine.

Parameters

dev	Device to request

Returns

True, if high speed is supported

References usb_setup_req_t::bmRequestType, usb_setup_req_t::bRequest, uhc_device_t::speed, uhc_setup_request_callback(), uhc_setup_request_finish, uhc_setup_request_finish_status, uhd_setup_request(), UHD_SPEED_FULL, UHD_SPEED_HIGH, USB_DT_DEVICE_QUALIFIER, USB_REQ_DIR_IN, USB_REQ_GET_DESCRIPTOR, USB_REQ_RECIP_DEVICE, USB_REQ_TYPE_STANDARD, usb_setup_req_t::wIndex, usb_setup_req_t::wLength, and usb_setup_req_t::wValue.

void uhc_dev_reset

(

uhc_device_t *

dev

)

Reset to re-enumerate.

Parameters

dev	Device to request

References uhc_device_t::conf_desc, dev, uhc_enum_try, uhc_enumeration_step3(), UHC_NB_UHI, and uhi_api_t::uninstall.

static void uhc_enable_timeout_callback ( uint8_t  timeout, uhc_sof_timeout_callback_t  callback  )

static

Enable a internal timeout on SOF events.

Parameters

timeout	value of timeout (ms)
callback	Callback to call at the end of timeout

References uhc_sof_timeout, and uhc_sof_timeout_callback.

Referenced by uhc_enumeration_step10(), uhc_enumeration_step2(), uhc_enumeration_step4(), uhc_enumeration_step6(), and uhc_enumeration_step8().

static void uhc_enumeration_error ( uhc_enum_status_t  status )

static

Manage error during device enumeration.

Parameters

status

Enumeration error occurred

References uhc_device_t::address, uhc_device_t::conf_desc, UHC_ENUM_DISCONNECT, UHC_ENUM_EVENT, UHC_ENUM_NB_TRY, uhc_enum_try, uhc_enumeration_step1(), uhc_enumeration_suspend(), and uhd_ep_free().

Referenced by uhc_enumeration_step10(), uhc_enumeration_step11(), uhc_enumeration_step12(), uhc_enumeration_step13(), uhc_enumeration_step14(), uhc_enumeration_step15(), uhc_enumeration_step17_lpm(), uhc_enumeration_step18_lpm(), uhc_enumeration_step5(), uhc_enumeration_step6(), uhc_enumeration_step9(), and uhc_request_bos_desc().

static void uhc_enumeration_reset ( uhd_callback_reset_t  callback )

static

Sends the USB Reset signal on the USB line of a device.

Parameters

callback

Callback to call at the end of Reset signal

References uhd_send_reset().

Referenced by uhc_enumeration_step1(), uhc_enumeration_step3(), and uhc_enumeration_step7().

static void uhc_enumeration_step1 ( void  )

static

Device enumeration step 1 Reset USB line.

References uhc_enumeration_reset(), and uhc_enumeration_step2().

Referenced by uhc_connection_tree(), and uhc_enumeration_error().

static void uhc_enumeration_step10 ( usb_add_t  add, uhd_trans_status_t  status, uint16_t  payload_trans  )

static

Device enumeration step 10 End of Set address request.

Lets USB line in IDLE state during 20ms.

Parameters

add	USB address of the setup request
status	Transfer status
payload_trans	Number of data transfered during DATA phase

References uhc_enable_timeout_callback(), UHC_ENUM_DISCONNECT, UHC_ENUM_FAIL, uhc_enumeration_error(), uhc_enumeration_step11(), UHD_TRANS_DISCONNECT, UHD_TRANS_NOERROR, and UNUSED.

Referenced by uhc_enumeration_step9().

static void uhc_enumeration_step11 ( void  )

static

Device enumeration step 11 Updates USB host pipe with the new USB address.

Requests a complete USB device descriptor.

References usb_dev_desc_t::bMaxPacketSize0, usb_setup_req_t::bmRequestType, usb_setup_req_t::bRequest, uhc_device_t::dev_desc, UHC_DEVICE_ENUM_ADD, UHC_ENUM_HARDWARE_LIMIT, UHC_ENUM_MEMORY_LIMIT, uhc_enumeration_error(), uhc_enumeration_step12(), uhd_ep0_alloc(), uhd_ep_free(), uhd_setup_request(), USB_DT_DEVICE, USB_REQ_DIR_IN, USB_REQ_GET_DESCRIPTOR, USB_REQ_RECIP_DEVICE, USB_REQ_TYPE_STANDARD, usb_setup_req_t::wIndex, usb_setup_req_t::wLength, and usb_setup_req_t::wValue.

Referenced by uhc_enumeration_step10().

static void uhc_enumeration_step12 ( usb_add_t  add, uhd_trans_status_t  status, uint16_t  payload_trans  )

static

Device enumeration step 12 Requests the first USB structure of the USB configuration descriptor.

Parameters

add	USB address of the setup request
status	Transfer status
payload_trans	Number of data transfered during DATA phase

References Assert, usb_dev_desc_t::bDescriptorType, usb_setup_req_t::bmRequestType, usb_dev_desc_t::bNumConfigurations, usb_setup_req_t::bRequest, uhc_device_t::conf_desc, uhc_device_t::dev_desc, UHC_DEVICE_CONF, UHC_DEVICE_ENUM_ADD, UHC_ENUM_DISCONNECT, UHC_ENUM_FAIL, UHC_ENUM_MEMORY_LIMIT, uhc_enumeration_error(), uhc_enumeration_step13(), uhd_setup_request(), UHD_TRANS_DISCONNECT, UHD_TRANS_NOERROR, UNUSED, USB_DT_CONFIGURATION, USB_DT_DEVICE, USB_REQ_DIR_IN, USB_REQ_GET_DESCRIPTOR, USB_REQ_RECIP_DEVICE, USB_REQ_TYPE_STANDARD, usb_setup_req_t::wIndex, usb_setup_req_t::wLength, and usb_setup_req_t::wValue.

Referenced by uhc_enumeration_step11().

static void uhc_enumeration_step13 ( usb_add_t  add, uhd_trans_status_t  status, uint16_t  payload_trans  )

static

Device enumeration step 13 Requests a complete Get configuration descriptor.

Parameters

add	USB address of the setup request
status	Transfer status
payload_trans	Number of data transfered during DATA phase

References Assert, usb_conf_desc_t::bConfigurationValue, usb_conf_desc_t::bDescriptorType, usb_conf_desc_t::bmAttributes, usb_conf_desc_t::bMaxPower, usb_setup_req_t::bmRequestType, usb_setup_req_t::bRequest, uhc_device_t::conf_desc, dev, le16_to_cpu, uhc_dev_enum, UHC_DEVICE_ENUM_ADD, UHC_ENUM_DISCONNECT, UHC_ENUM_EVENT, UHC_ENUM_FAIL, UHC_ENUM_MEMORY_LIMIT, UHC_ENUM_OVERCURRENT, uhc_enumeration_error(), uhc_enumeration_step14(), uhc_enumeration_suspend(), uhc_power_running, uhd_setup_request(), UHD_TRANS_DISCONNECT, UHD_TRANS_NOERROR, UNUSED, USB_CONFIG_ATTR_SELF_POWERED, USB_DT_CONFIGURATION, USB_HOST_POWER_MAX, USB_REQ_DIR_IN, USB_REQ_GET_DESCRIPTOR, USB_REQ_RECIP_DEVICE, USB_REQ_TYPE_STANDARD, usb_setup_req_t::wIndex, usb_setup_req_t::wLength, usb_conf_desc_t::wTotalLength, and usb_setup_req_t::wValue.

Referenced by uhc_enumeration_step12().

static void uhc_enumeration_step14 ( usb_add_t  add, uhd_trans_status_t  status, uint16_t  payload_trans  )

static

Device enumeration step 14 Enable USB configuration, if unless one USB interface is supported by UHIs.

Parameters

add	USB address of the setup request
status	Transfer status
payload_trans	Number of data transfered during DATA phase

References usb_conf_desc_t::bConfigurationValue, usb_conf_desc_t::bDescriptorType, usb_setup_req_t::bmRequestType, usb_setup_req_t::bRequest, uhc_device_t::conf_desc, le16_to_cpu, UHC_DEVICE_ENUM_ADD, UHC_ENUM_DISCONNECT, UHC_ENUM_EVENT, UHC_ENUM_FAIL, UHC_ENUM_HARDWARE_LIMIT, UHC_ENUM_MEMORY_LIMIT, UHC_ENUM_SUCCESS, UHC_ENUM_UNSUPPORTED, uhc_enumeration_error(), uhc_enumeration_step15(), uhc_enumeration_suspend(), UHC_NB_UHI, uhd_ep_free(), uhd_setup_request(), UHD_TRANS_DISCONNECT, UHD_TRANS_NOERROR, UNUSED, USB_DT_CONFIGURATION, USB_REQ_DIR_OUT, USB_REQ_RECIP_DEVICE, USB_REQ_SET_CONFIGURATION, USB_REQ_TYPE_STANDARD, usb_setup_req_t::wIndex, usb_setup_req_t::wLength, usb_conf_desc_t::wTotalLength, and usb_setup_req_t::wValue.

Referenced by uhc_enumeration_step13().

static void uhc_enumeration_step15 ( usb_add_t  add, uhd_trans_status_t  status, uint16_t  payload_trans  )

static

Device enumeration step 15 Enables UHI interfaces.

Parameters

add	USB address of the setup request
status	Transfer status
payload_trans	Number of data transfered during DATA phase

References usb_dev_desc_t::bcdUSB, uhc_device_t::dev_desc, uhi_api_t::enable, LE16, uhc_device_t::lpm_desc, UHC_ENUM_DISCONNECT, UHC_ENUM_EVENT, UHC_ENUM_FAIL, UHC_ENUM_SUCCESS, uhc_enum_try, uhc_enumeration_error(), uhc_enumeration_step16_lpm(), UHC_NB_UHI, UHD_TRANS_DISCONNECT, UHD_TRANS_NOERROR, uhi_api_t::uninstall, UNUSED, and USB_V2_1.

Referenced by uhc_enumeration_step14().

static void uhc_enumeration_step16_lpm ( void  )

static

Device enumeration step 16 (LPM only) Requests first part of the USB BOS descriptor.

References uhc_enumeration_step17_lpm(), and uhc_request_bos_desc().

Referenced by uhc_enumeration_step15().

static void uhc_enumeration_step17_lpm ( usb_add_t  add, uhd_trans_status_t  status, uint16_t  payload_trans  )

static

Device enumeration step 17 (LPM only) Check LPM support through the BOS descriptor received and request the whole BOS descriptor.

Parameters

add	USB address of the setup request
status	Transfer status
payload_trans	Number of data transfered during DATA phase

References usb_dev_bos_desc_t::bDescriptorType, usb_dev_lpm_desc_t::bos, le16_to_cpu, uhc_device_t::lpm_desc, UHC_ENUM_DISCONNECT, UHC_ENUM_EVENT, UHC_ENUM_FAIL, UHC_ENUM_SUCCESS, uhc_enum_try, uhc_enumeration_error(), uhc_enumeration_step18_lpm(), uhc_request_bos_desc(), UHD_TRANS_DISCONNECT, UHD_TRANS_NOERROR, UHD_TRANS_STALL, UNUSED, USB_DT_BOS, and usb_dev_bos_desc_t::wTotalLength.

Referenced by uhc_enumeration_step16_lpm().

static void uhc_enumeration_step18_lpm ( usb_add_t  add, uhd_trans_status_t  status, uint16_t  payload_trans  )

static

Device enumeration step 18 (LPM only) Check LPM support through the BOS descriptor received.

Parameters

add	USB address of the setup request
status	Transfer status
payload_trans	Number of data transfered during DATA phase

References usb_dev_bos_desc_t::bDescriptorType, usb_dev_bos_desc_t::bNumDeviceCaps, usb_dev_lpm_desc_t::bos, le16_to_cpu, uhc_device_t::lpm_desc, UHC_ENUM_DISCONNECT, UHC_ENUM_EVENT, UHC_ENUM_FAIL, UHC_ENUM_SUCCESS, uhc_enum_try, uhc_enumeration_error(), UHD_TRANS_DISCONNECT, UHD_TRANS_NOERROR, UHD_TRANS_STALL, UNUSED, USB_DC_EXT_LPM, USB_DC_USB20_EXTENSION, USB_DT_BOS, USB_DT_DEVICE_CAPABILITY, and usb_dev_bos_desc_t::wTotalLength.

Referenced by uhc_enumeration_step17_lpm().

static void uhc_enumeration_step2 ( void  )

static

Device enumeration step 2 Lets USB line in IDLE state during 20ms.

References uhc_enable_timeout_callback(), and uhc_enumeration_step3().

Referenced by uhc_enumeration_step1().

static void uhc_enumeration_step3 ( void  )

static

Device enumeration step 3 Reset USB line.

References uhc_enumeration_reset(), and uhc_enumeration_step4().

Referenced by uhc_dev_reset(), and uhc_enumeration_step2().

static void uhc_enumeration_step4 ( void  )

static

Device enumeration step 4 Lets USB line in IDLE state during 100ms.

References uhc_device_t::speed, uhc_enable_timeout_callback(), uhc_enumeration_step5(), and uhd_get_speed().

Referenced by uhc_enumeration_step3().

static void uhc_enumeration_step5 ( void  )

static

Device enumeration step 5 Requests the USB device descriptor.

This setup request can be aborted because the control endpoint size is unknown.

References usb_dev_desc_t::bMaxPacketSize0, usb_setup_req_t::bmRequestType, usb_setup_req_t::bRequest, uhc_device_t::dev_desc, UHC_ENUM_HARDWARE_LIMIT, UHC_ENUM_MEMORY_LIMIT, uhc_enumeration_error(), uhc_enumeration_step6(), uhd_ep0_alloc(), uhd_ep_free(), uhd_setup_request(), USB_DT_DEVICE, USB_REQ_DIR_IN, USB_REQ_GET_DESCRIPTOR, USB_REQ_RECIP_DEVICE, USB_REQ_TYPE_STANDARD, usb_setup_req_t::wIndex, usb_setup_req_t::wLength, and usb_setup_req_t::wValue.

Referenced by uhc_enumeration_step4().

static void uhc_enumeration_step6 ( usb_add_t  add, uhd_trans_status_t  status, uint16_t  payload_trans  )

static

Device enumeration step 6 End of Get device descriptor request.

Wait 20ms in IDLE state.

Parameters

add	USB address of the setup request
status	Transfer status
payload_trans	Number of data transfered during DATA phase

References usb_dev_desc_t::bDescriptorType, uhc_device_t::dev_desc, uhc_enable_timeout_callback(), UHC_ENUM_DISCONNECT, UHC_ENUM_FAIL, uhc_enumeration_error(), uhc_enumeration_step7(), UHD_TRANS_DISCONNECT, UHD_TRANS_NOERROR, UNUSED, and USB_DT_DEVICE.

Referenced by uhc_enumeration_step5().

static void uhc_enumeration_step7 ( void  )

static

Device enumeration step 7 Reset USB line.

References uhc_enumeration_reset(), and uhc_enumeration_step8().

Referenced by uhc_enumeration_step6().

static void uhc_enumeration_step8 ( void  )

static

Device enumeration step 8 Lets USB line in IDLE state during 100ms.

References uhc_enable_timeout_callback(), and uhc_enumeration_step9().

Referenced by uhc_enumeration_step7().

static void uhc_enumeration_step9 ( void  )

static

Device enumeration step 9 Send a Set address setup request.

References uhc_device_t::address, usb_dev_desc_t::bMaxPacketSize0, usb_setup_req_t::bmRequestType, usb_setup_req_t::bRequest, dev, uhc_device_t::dev_desc, g_uhc_device_root, UHC_DEVICE_ENUM_ADD, UHC_ENUM_HARDWARE_LIMIT, UHC_ENUM_MEMORY_LIMIT, uhc_enumeration_error(), uhc_enumeration_step10(), uhd_ep0_alloc(), uhd_ep_free(), uhd_setup_request(), USB_REQ_DIR_OUT, USB_REQ_RECIP_DEVICE, USB_REQ_SET_ADDRESS, USB_REQ_TYPE_STANDARD, usb_setup_req_t::wIndex, usb_setup_req_t::wLength, and usb_setup_req_t::wValue.

Referenced by uhc_enumeration_step8().

static void uhc_enumeration_suspend ( void  )

static

Enters a specific device in USB suspend mode Suspend the USB line or a port on USB hub.

References uhd_suspend().

Referenced by uhc_enumeration_error(), uhc_enumeration_step13(), and uhc_enumeration_step14().

uint8_t uhc_get_device_number

(

void

)

Returns the number of connected devices.

Returns

Number of device connected on USB tree

References uhc_device_t::address, dev, g_uhc_device_root, and UHC_USB_ADD_NOT_VALID.

bool uhc_is_suspend

(

void

)

Test if the suspend state is enabled on the USB line.

Returns

USB line in SUSPEND state or device not connected, if true

References uhc_device_t::address, UHC_USB_ADD_NOT_VALID, and uhd_is_suspend().

Referenced by uhc_resume().

void uhc_notify_connection

(

bool

b_plug

)

Notify device connection or disconnection.

Parameters

b_plug

Device connection, if true

References uhc_device_t::address, Assert, uhc_connection_tree(), uhc_power_running, and UHC_USB_ADD_NOT_VALID.

Referenced by _uhd_connect(), _uhd_disconnect(), and uhd_disable().

void uhc_notify_resume

(

void

)

Notify that a resume bus occurs A resume can occur after a downstream or an upstream resume.

References uhc_remotewakeup(), and UHC_WAKEUP_EVENT.

Referenced by _uhd_sof_interrupt().

void uhc_notify_resume_lpm

(

void

)

Notify that a resume bus occurs after a L1 state A resume can occur after a downstream or an upstream resume.

References UHC_WAKEUP_EVENT.

Referenced by _uhd_downstream_resume(), _uhd_upstream_resume(), and _uhd_wakeup().

void uhc_notify_sof

(

bool

b_micro

)

Notify each start of frame sent by driver.

Parameters

b_micro

It is a micro start of frame, if true

References uhi_api_t::sof_notify, UHC_NB_UHI, uhc_sof_timeout, and uhc_sof_timeout_callback.

Referenced by _uhd_sof_interrupt().

static void uhc_remotewakeup ( bool  b_enable )

static

Enables or disables the remote wakeup feature of all devices connected.

Parameters

b_enable

true to enable remote wakeup feature, else disable.

References uhc_device_t::address, usb_conf_desc_t::bmAttributes, usb_setup_req_t::bmRequestType, usb_setup_req_t::bRequest, uhc_device_t::conf_desc, dev, g_uhc_device_root, uhd_setup_request(), USB_CONFIG_ATTR_REMOTE_WAKEUP, USB_DEV_FEATURE_REMOTE_WAKEUP, USB_REQ_CLEAR_FEATURE, USB_REQ_DIR_OUT, USB_REQ_RECIP_DEVICE, USB_REQ_SET_FEATURE, USB_REQ_TYPE_STANDARD, usb_setup_req_t::wIndex, usb_setup_req_t::wLength, and usb_setup_req_t::wValue.

Referenced by uhc_notify_resume(), and uhc_suspend().

static void uhc_request_bos_desc ( uint16_t  length, const uhd_callback_setup_end_t  callback  )

static

Requests the USB structure of the USB BOS descriptor.

References Assert, usb_setup_req_t::bmRequestType, usb_setup_req_t::bRequest, uhc_device_t::lpm_desc, UHC_DEVICE_ENUM_ADD, UHC_ENUM_MEMORY_LIMIT, uhc_enumeration_error(), uhd_setup_request(), USB_DT_BOS, USB_REQ_DIR_IN, USB_REQ_GET_DESCRIPTOR, USB_REQ_RECIP_DEVICE, USB_REQ_TYPE_STANDARD, usb_setup_req_t::wIndex, usb_setup_req_t::wLength, and usb_setup_req_t::wValue.

Referenced by uhc_enumeration_step16_lpm(), and uhc_enumeration_step17_lpm().

void uhc_resume

(

void

)

Resumes the USB line.

References uhc_is_suspend(), and uhd_resume().

static void uhc_setup_request_callback ( usb_add_t  add, uhd_trans_status_t  status, uint16_t  payload_trans  )

static

Callback used to signal the end of a setup request.

Parameters

add	USB address of the setup request
status	Transfer status
payload_trans	Number of data transfered during DATA phase

References uhc_setup_request_finish, uhc_setup_request_finish_status, UHD_TRANS_NOERROR, and UNUSED.

Referenced by uhc_dev_get_string(), and uhc_dev_is_high_speed_support().

void uhc_start

(

void

)

Starts the host mode.

References uhc_device_t::address, uhc_sof_timeout, UHC_USB_ADD_NOT_VALID, and uhd_enable().

Referenced by bootloader_system_init(), and usb_dual_enable().

void uhc_stop

(

bool

b_id_stop

)

Stops the host mode.

Parameters

b_id_stop

Stop USB ID pin management, if true.

References uhd_disable().

Referenced by main().

void uhc_suspend

(

bool

b_remotewakeup

)

Suspends a USB line.

Parameters

b_remotewakeup

Authorize the remote wakeup features, if true

References uhc_enum_try, uhc_remotewakeup(), and uhd_suspend().

bool uhc_suspend_lpm	(	bool	b_remotewakeup,
		uint8_t	hird
	)

Suspends a USB line through LPM feature.

Parameters

b_remotewakeup	Authorize the remote wakeup features, if true
hird	Host Initiated Resume Duration

Returns

flase if the LPM is not supported by USB Device

References uhc_device_t::lpm_desc, uhc_enum_try, and uhd_suspend_lpm().

uhc_device_t g_uhc_device_root

static

Entry point of all devices connected on USB tree.

Referenced by uhc_enumeration_step9(), uhc_get_device_number(), and uhc_remotewakeup().

uint8_t uhc_enum_try

static

Number of enumeration try.

Referenced by uhc_connection_tree(), uhc_dev_reset(), uhc_enumeration_error(), uhc_enumeration_step15(), uhc_enumeration_step17_lpm(), uhc_enumeration_step18_lpm(), uhc_suspend(), and uhc_suspend_lpm().

volatile bool uhc_setup_request_finish

static

Volatile flag to pool the end of Get USB string setup request.

Referenced by uhc_dev_get_string(), uhc_dev_is_high_speed_support(), and uhc_setup_request_callback().

volatile bool uhc_setup_request_finish_status

static

Volatile flag to know the status of Get USB string setup request.

Referenced by uhc_dev_get_string(), uhc_dev_is_high_speed_support(), and uhc_setup_request_callback().

uint8_t uhc_sof_timeout

Number of SOF remaining before call uhc_sof_timeout_callback callback.

Referenced by uhc_connection_tree(), uhc_enable_timeout_callback(), uhc_notify_sof(), and uhc_start().

uhc_sof_timeout_callback_t uhc_sof_timeout_callback

static

Callback currently registered on a SOF timeout.

Referenced by uhc_enable_timeout_callback(), and uhc_notify_sof().

uhi_api_t uhc_uhis[] = {USB_HOST_UHI}

static

Array of all UHI available.