diff options
Diffstat (limited to 'src/device/usbd.c')
| -rw-r--r-- | src/device/usbd.c | 665 |
1 files changed, 665 insertions, 0 deletions
diff --git a/src/device/usbd.c b/src/device/usbd.c new file mode 100644 index 000000000..8c685d5b3 --- /dev/null +++ b/src/device/usbd.c @@ -0,0 +1,665 @@ +/**************************************************************************/
+/*!
+ @file usbd.c
+ @author hathach (tinyusb.org)
+
+ @section LICENSE
+
+ Software License Agreement (BSD License)
+
+ Copyright (c) 2013, hathach (tinyusb.org)
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+ 1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+ 3. Neither the name of the copyright holders nor the
+ names of its contributors may be used to endorse or promote products
+ derived from this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+ EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
+ DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ This file is part of the tinyusb stack.
+*/
+/**************************************************************************/
+
+// This top level class manages the bus state and delegates events to class-specific drivers.
+
+#include "tusb_option.h"
+
+#if TUSB_OPT_DEVICE_ENABLED
+
+#define _TINY_USB_SOURCE_FILE_
+
+#include "tusb.h"
+#include "usbd.h"
+#include "device/usbd_pvt.h"
+
+#ifndef CFG_TUD_TASK_QUEUE_SZ
+#define CFG_TUD_TASK_QUEUE_SZ 16
+#endif
+
+#ifndef CFG_TUD_TASK_STACK_SZ
+#define CFG_TUD_TASK_STACK_SZ 150
+#endif
+
+#ifndef CFG_TUD_TASK_PRIO
+#define CFG_TUD_TASK_PRIO 0
+#endif
+
+
+//--------------------------------------------------------------------+
+// Device Data
+//--------------------------------------------------------------------+
+typedef struct {
+ uint8_t config_num;
+
+ uint8_t itf2drv[16]; // map interface number to driver (0xff is invalid)
+ uint8_t ep2drv[8][2]; // map endpoint to driver ( 0xff is invalid )
+
+}usbd_device_t;
+
+static usbd_device_t _usbd_dev;
+
+// Auto descriptor is enabled, descriptor set point to auto generated one
+#if CFG_TUD_DESC_AUTO
+extern tud_desc_set_t const _usbd_auto_desc_set;
+tud_desc_set_t const* usbd_desc_set = &_usbd_auto_desc_set;
+#else
+tud_desc_set_t const* usbd_desc_set = &tud_desc_set;
+#endif
+
+//--------------------------------------------------------------------+
+// Class Driver
+//--------------------------------------------------------------------+
+typedef struct {
+ uint8_t class_code;
+
+ void (* init ) (void);
+ bool (* open ) (uint8_t rhport, tusb_desc_interface_t const * desc_intf, uint16_t* p_length);
+ bool (* control_request ) (uint8_t rhport, tusb_control_request_t const * request);
+ bool (* control_request_complete ) (uint8_t rhport, tusb_control_request_t const * request);
+ bool (* xfer_cb ) (uint8_t rhport, uint8_t ep_addr, xfer_result_t, uint32_t);
+ void (* sof ) (uint8_t rhport);
+ void (* reset ) (uint8_t);
+} usbd_class_driver_t;
+
+static usbd_class_driver_t const usbd_class_drivers[] =
+{
+ #if CFG_TUD_CDC
+ {
+ .class_code = TUSB_CLASS_CDC,
+ .init = cdcd_init,
+ .open = cdcd_open,
+ .control_request = cdcd_control_request,
+ .control_request_complete = cdcd_control_request_complete,
+ .xfer_cb = cdcd_xfer_cb,
+ .sof = NULL,
+ .reset = cdcd_reset
+ },
+ #endif
+
+ #if CFG_TUD_MSC
+ {
+ .class_code = TUSB_CLASS_MSC,
+ .init = mscd_init,
+ .open = mscd_open,
+ .control_request = mscd_control_request,
+ .control_request_complete = mscd_control_request_complete,
+ .xfer_cb = mscd_xfer_cb,
+ .sof = NULL,
+ .reset = mscd_reset
+ },
+ #endif
+
+
+ #if CFG_TUD_HID
+ {
+ .class_code = TUSB_CLASS_HID,
+ .init = hidd_init,
+ .open = hidd_open,
+ .control_request = hidd_control_request,
+ .control_request_complete = hidd_control_request_complete,
+ .xfer_cb = hidd_xfer_cb,
+ .sof = NULL,
+ .reset = hidd_reset
+ },
+ #endif
+
+ #if CFG_TUD_CUSTOM_CLASS
+ {
+ .class_code = TUSB_CLASS_VENDOR_SPECIFIC,
+ .init = cusd_init,
+ .open = cusd_open,
+ .control_request = cusd_control_request,
+ .control_request_complete = cusd_control_request_complete,
+ .xfer_cb = cusd_xfer_cb,
+ .sof = NULL,
+ .reset = cusd_reset
+ },
+ #endif
+};
+
+enum { USBD_CLASS_DRIVER_COUNT = sizeof(usbd_class_drivers) / sizeof(usbd_class_driver_t) };
+
+
+//--------------------------------------------------------------------+
+// DCD Event
+//--------------------------------------------------------------------+
+OSAL_TASK_DEF(_usbd_task_def, "usbd", usbd_task, CFG_TUD_TASK_PRIO, CFG_TUD_TASK_STACK_SZ);
+
+// Event queue
+// role device/host is used by OS NONE for mutex (disable usb isr) only
+OSAL_QUEUE_DEF(OPT_MODE_DEVICE, _usbd_qdef, CFG_TUD_TASK_QUEUE_SZ, dcd_event_t);
+static osal_queue_t _usbd_q;
+
+//--------------------------------------------------------------------+
+// Prototypes
+//--------------------------------------------------------------------+
+static void mark_interface_endpoint(uint8_t ep2drv[8][2], uint8_t const* p_desc, uint16_t desc_len, uint8_t driver_id);
+static bool process_control_request(uint8_t rhport, tusb_control_request_t const * p_request);
+static bool process_set_config(uint8_t rhport);
+static void const* get_descriptor(tusb_control_request_t const * p_request, uint16_t* desc_len);
+
+void usbd_control_reset (uint8_t rhport);
+bool usbd_control_xfer_cb (uint8_t rhport, uint8_t ep_addr, xfer_result_t event, uint32_t xferred_bytes);
+void usbd_control_set_complete_callback( bool (*fp) (uint8_t, tusb_control_request_t const * ) );
+
+//--------------------------------------------------------------------+
+// APPLICATION API
+//--------------------------------------------------------------------+
+bool tud_mounted(void)
+{
+ return _usbd_dev.config_num > 0;
+}
+
+//--------------------------------------------------------------------+
+// USBD Task
+//--------------------------------------------------------------------+
+bool usbd_init (void)
+{
+ // Init device queue & task
+ _usbd_q = osal_queue_create(&_usbd_qdef);
+ TU_ASSERT(_usbd_q != NULL);
+
+ osal_task_create(&_usbd_task_def);
+
+ // Init class drivers
+ for (uint8_t i = 0; i < USBD_CLASS_DRIVER_COUNT; i++) usbd_class_drivers[i].init();
+
+ // Init device controller driver
+ TU_ASSERT(dcd_init(TUD_OPT_RHPORT));
+ dcd_int_enable(TUD_OPT_RHPORT);
+
+ return true;
+}
+
+static void usbd_reset(uint8_t rhport)
+{
+ tu_varclr(&_usbd_dev);
+ memset(_usbd_dev.itf2drv, 0xff, sizeof(_usbd_dev.itf2drv)); // invalid mapping
+ memset(_usbd_dev.ep2drv , 0xff, sizeof(_usbd_dev.ep2drv )); // invalid mapping
+
+ usbd_control_reset(rhport);
+
+ for (uint8_t i = 0; i < USBD_CLASS_DRIVER_COUNT; i++)
+ {
+ if ( usbd_class_drivers[i].reset ) usbd_class_drivers[i].reset( rhport );
+ }
+}
+
+// Main device task implementation
+static void usbd_task_body(void)
+{
+ // Loop until there is no more events in the queue
+ while (1)
+ {
+ dcd_event_t event;
+
+ if ( !osal_queue_receive(_usbd_q, &event) ) return;
+
+ switch ( event.event_id )
+ {
+ case DCD_EVENT_SETUP_RECEIVED:
+ // Process control request, if failed control endpoint is stalled
+ if ( !process_control_request(event.rhport, &event.setup_received) )
+ {
+ usbd_control_stall(event.rhport);
+ }
+ break;
+
+ case DCD_EVENT_XFER_COMPLETE:
+ {
+ // Invoke the class callback associated with the endpoint address
+ uint8_t const ep_addr = event.xfer_complete.ep_addr;
+
+ if ( 0 == tu_edpt_number(ep_addr) )
+ {
+ // control transfer DATA stage callback
+ usbd_control_xfer_cb(event.rhport, ep_addr, event.xfer_complete.result, event.xfer_complete.len);
+ }
+ else
+ {
+ uint8_t const drv_id = _usbd_dev.ep2drv[tu_edpt_number(ep_addr)][tu_edpt_dir(ep_addr)];
+ TU_ASSERT(drv_id < USBD_CLASS_DRIVER_COUNT,);
+
+ usbd_class_drivers[drv_id].xfer_cb(event.rhport, ep_addr, event.xfer_complete.result, event.xfer_complete.len);
+ }
+ }
+ break;
+
+ case DCD_EVENT_BUS_RESET:
+ usbd_reset(event.rhport);
+ // TODO remove since if task is too slow, we could clear the event of the new attached
+ osal_queue_reset(_usbd_q);
+ break;
+
+ case DCD_EVENT_UNPLUGGED:
+ usbd_reset(event.rhport);
+ // TODO remove since if task is too slow, we could clear the event of the new attached
+ osal_queue_reset(_usbd_q);
+
+ // invoke callback
+ if (tud_umount_cb) tud_umount_cb();
+ break;
+
+ case DCD_EVENT_SOF:
+ for ( uint8_t i = 0; i < USBD_CLASS_DRIVER_COUNT; i++ )
+ {
+ if ( usbd_class_drivers[i].sof )
+ {
+ usbd_class_drivers[i].sof(event.rhport);
+ }
+ }
+ break;
+
+ case USBD_EVT_FUNC_CALL:
+ if ( event.func_call.func ) event.func_call.func(event.func_call.param);
+ break;
+
+ default:
+ TU_BREAKPOINT();
+ break;
+ }
+ }
+}
+
+/* USB device task
+ * Thread that handles all device events. With an real RTOS, the task must be a forever loop and never return.
+ * For coding convenience with no RTOS, we use wrapped sub-function for processing to easily return at any time.
+ */
+void usbd_task( void* param)
+{
+ (void) param;
+
+#if CFG_TUSB_OS != OPT_OS_NONE
+ while (1) {
+#endif
+
+ usbd_task_body();
+
+#if CFG_TUSB_OS != OPT_OS_NONE
+ }
+#endif
+}
+
+//--------------------------------------------------------------------+
+// Control Request Parser & Handling
+//--------------------------------------------------------------------+
+
+// This handles the actual request and its response.
+// return false will cause its caller to stall control endpoint
+static bool process_control_request(uint8_t rhport, tusb_control_request_t const * p_request)
+{
+ usbd_control_set_complete_callback(NULL);
+
+ if ( TUSB_REQ_RCPT_DEVICE == p_request->bmRequestType_bit.recipient &&
+ TUSB_REQ_TYPE_STANDARD == p_request->bmRequestType_bit.type )
+ {
+ //------------- Standard Device Requests e.g in enumeration -------------//
+ void* data_buf = NULL;
+ uint16_t data_len = 0;
+
+ switch ( p_request->bRequest )
+ {
+ case TUSB_REQ_SET_ADDRESS:
+ // response with status first before changing device address
+ usbd_control_status(rhport, p_request);
+ dcd_set_address(rhport, (uint8_t) p_request->wValue);
+ return true; // skip the rest
+ break;
+
+ case TUSB_REQ_GET_CONFIGURATION:
+ data_buf = &_usbd_dev.config_num;
+ data_len = 1;
+ break;
+
+ case TUSB_REQ_SET_CONFIGURATION:
+ {
+ uint8_t const config = (uint8_t) p_request->wValue;
+
+ dcd_set_config(rhport, config);
+ _usbd_dev.config_num = config;
+
+ TU_ASSERT( TUSB_ERROR_NONE == process_set_config(rhport) );
+ }
+ break;
+
+ case TUSB_REQ_GET_DESCRIPTOR:
+ data_buf = (void*) get_descriptor(p_request, &data_len);
+ if ( data_buf == NULL || data_len == 0 ) return false;
+ break;
+
+ default:
+ TU_BREAKPOINT();
+ return false;
+ }
+
+ usbd_control_xfer(rhport, p_request, data_buf, data_len);
+ }
+ else if ( TUSB_REQ_RCPT_INTERFACE == p_request->bmRequestType_bit.recipient )
+ {
+ //------------- Class/Interface Specific Request -------------//
+ uint8_t const itf = tu_u16_low(p_request->wIndex);
+ uint8_t const drvid = _usbd_dev.itf2drv[ itf ];
+
+ TU_VERIFY(drvid < USBD_CLASS_DRIVER_COUNT);
+
+ usbd_control_set_complete_callback(usbd_class_drivers[drvid].control_request_complete );
+
+ // control endpoint will be stalled if driver return false
+ return usbd_class_drivers[drvid].control_request(rhport, p_request);
+ }
+ else if ( p_request->bmRequestType_bit.recipient == TUSB_REQ_RCPT_ENDPOINT &&
+ p_request->bmRequestType_bit.type == TUSB_REQ_TYPE_STANDARD )
+ {
+ //------------- Endpoint Request -------------//
+ switch ( p_request->bRequest )
+ {
+ case TUSB_REQ_GET_STATUS:
+ {
+ uint16_t status = dcd_edpt_stalled(rhport, tu_u16_low(p_request->wIndex)) ? 0x0001 : 0x0000;
+ usbd_control_xfer(rhport, p_request, &status, 2);
+ }
+ break;
+
+ case TUSB_REQ_CLEAR_FEATURE:
+ // only endpoint feature is halted/stalled
+ dcd_edpt_clear_stall(rhport, tu_u16_low(p_request->wIndex));
+ usbd_control_status(rhport, p_request);
+ break;
+
+ case TUSB_REQ_SET_FEATURE:
+ // only endpoint feature is halted/stalled
+ dcd_edpt_stall(rhport, tu_u16_low(p_request->wIndex));
+ usbd_control_status(rhport, p_request);
+ break;
+
+ default:
+ TU_BREAKPOINT();
+ return false;
+ }
+ }
+ else
+ {
+ //------------- Unsupported Request -------------//
+ TU_BREAKPOINT();
+ return false;
+ }
+
+ return true;
+}
+
+// Process Set Configure Request
+// This function parse configuration descriptor & open drivers accordingly
+static bool process_set_config(uint8_t rhport)
+{
+ uint8_t const * desc_cfg = (uint8_t const *) usbd_desc_set->config;
+ TU_ASSERT(desc_cfg != NULL);
+
+ uint8_t const * p_desc = desc_cfg + sizeof(tusb_desc_configuration_t);
+ uint16_t const cfg_len = ((tusb_desc_configuration_t*)desc_cfg)->wTotalLength;
+
+ while( p_desc < desc_cfg + cfg_len )
+ {
+ // Each interface always starts with Interface or Association descriptor
+ if ( TUSB_DESC_INTERFACE_ASSOCIATION == tu_desc_type(p_desc) )
+ {
+ p_desc = tu_desc_next(p_desc); // ignore Interface Association
+ }else
+ {
+ TU_ASSERT( TUSB_DESC_INTERFACE == tu_desc_type(p_desc) );
+
+ tusb_desc_interface_t* desc_itf = (tusb_desc_interface_t*) p_desc;
+
+ // Check if class is supported
+ uint8_t drv_id;
+ for (drv_id = 0; drv_id < USBD_CLASS_DRIVER_COUNT; drv_id++)
+ {
+ if ( usbd_class_drivers[drv_id].class_code == desc_itf->bInterfaceClass ) break;
+ }
+ TU_ASSERT( drv_id < USBD_CLASS_DRIVER_COUNT );
+
+ // Interface number must not be used already TODO alternate interface
+ TU_ASSERT( 0xff == _usbd_dev.itf2drv[desc_itf->bInterfaceNumber] );
+ _usbd_dev.itf2drv[desc_itf->bInterfaceNumber] = drv_id;
+
+ uint16_t itf_len=0;
+ TU_ASSERT( usbd_class_drivers[drv_id].open( rhport, desc_itf, &itf_len ) );
+ TU_ASSERT( itf_len >= sizeof(tusb_desc_interface_t) );
+
+ mark_interface_endpoint(_usbd_dev.ep2drv, p_desc, itf_len, drv_id);
+
+ p_desc += itf_len; // next interface
+ }
+ }
+
+ // invoke callback
+ if (tud_mount_cb) tud_mount_cb();
+
+ return TUSB_ERROR_NONE;
+}
+
+// Helper marking endpoint of interface belongs to class driver
+static void mark_interface_endpoint(uint8_t ep2drv[8][2], uint8_t const* p_desc, uint16_t desc_len, uint8_t driver_id)
+{
+ uint16_t len = 0;
+
+ while( len < desc_len )
+ {
+ if ( TUSB_DESC_ENDPOINT == tu_desc_type(p_desc) )
+ {
+ uint8_t const ep_addr = ((tusb_desc_endpoint_t const*) p_desc)->bEndpointAddress;
+
+ ep2drv[tu_edpt_number(ep_addr)][tu_edpt_dir(ep_addr)] = driver_id;
+ }
+
+ len += tu_desc_len(p_desc);
+ p_desc = tu_desc_next(p_desc);
+ }
+}
+
+// return descriptor's buffer and update desc_len
+static void const* get_descriptor(tusb_control_request_t const * p_request, uint16_t* desc_len)
+{
+ tusb_desc_type_t const desc_type = (tusb_desc_type_t) tu_u16_high(p_request->wValue);
+ uint8_t const desc_index = tu_u16_low( p_request->wValue );
+
+ uint8_t const * desc_data = NULL;
+ uint16_t len = 0;
+
+ *desc_len = 0;
+
+ switch(desc_type)
+ {
+ case TUSB_DESC_DEVICE:
+ desc_data = (uint8_t const *) usbd_desc_set->device;
+ len = sizeof(tusb_desc_device_t);
+ break;
+
+ case TUSB_DESC_CONFIGURATION:
+ desc_data = (uint8_t const *) usbd_desc_set->config;
+ len = ((tusb_desc_configuration_t const*) desc_data)->wTotalLength;
+ break;
+
+ case TUSB_DESC_STRING:
+ // String Descriptor always uses the desc set from user
+ if ( desc_index < tud_desc_set.string_count )
+ {
+ desc_data = tud_desc_set.string_arr[desc_index];
+ TU_VERIFY( desc_data != NULL, NULL );
+
+ len = desc_data[0]; // first byte of descriptor is its size
+ }else
+ {
+ // out of range
+ /* The 0xEE index string is a Microsoft USB extension.
+ * It can be used to tell Windows what driver it should use for the device !!!
+ */
+ return NULL;
+ }
+ break;
+
+ case TUSB_DESC_DEVICE_QUALIFIER:
+ // TODO If not highspeed capable stall this request otherwise
+ // return the descriptor that could work in highspeed
+ return NULL;
+ break;
+
+ default: return NULL;
+ }
+
+ *desc_len = len;
+ return desc_data;
+}
+
+//--------------------------------------------------------------------+
+// DCD Event Handler
+//--------------------------------------------------------------------+
+void dcd_event_handler(dcd_event_t const * event, bool in_isr)
+{
+ switch (event->event_id)
+ {
+ case DCD_EVENT_BUS_RESET:
+ case DCD_EVENT_UNPLUGGED:
+ osal_queue_send(_usbd_q, event, in_isr);
+ break;
+
+ case DCD_EVENT_SOF:
+ // nothing to do now
+ break;
+
+ case DCD_EVENT_SUSPENDED:
+ // TODO support suspended
+ break;
+
+ case DCD_EVENT_RESUME:
+ // TODO support resume
+ break;
+
+ case DCD_EVENT_SETUP_RECEIVED:
+ osal_queue_send(_usbd_q, event, in_isr);
+ break;
+
+ case DCD_EVENT_XFER_COMPLETE:
+ // skip zero-length control status complete event, should dcd notifies us.
+ if ( 0 == tu_edpt_number(event->xfer_complete.ep_addr) && event->xfer_complete.len == 0) break;
+
+ osal_queue_send(_usbd_q, event, in_isr);
+ TU_ASSERT(event->xfer_complete.result == XFER_RESULT_SUCCESS,);
+ break;
+
+ // Not an DCD event, just a convenient way to defer ISR function should we need
+ case USBD_EVT_FUNC_CALL:
+ osal_queue_send(_usbd_q, event, in_isr);
+ break;
+
+ default: break;
+ }
+}
+
+// helper to send bus signal event
+void dcd_event_bus_signal (uint8_t rhport, dcd_eventid_t eid, bool in_isr)
+{
+ dcd_event_t event = { .rhport = rhport, .event_id = eid, };
+ dcd_event_handler(&event, in_isr);
+}
+
+// helper to send setup received
+void dcd_event_setup_received(uint8_t rhport, uint8_t const * setup, bool in_isr)
+{
+ dcd_event_t event = { .rhport = rhport, .event_id = DCD_EVENT_SETUP_RECEIVED };
+ memcpy(&event.setup_received, setup, 8);
+
+ dcd_event_handler(&event, in_isr);
+}
+
+// helper to send transfer complete event
+void dcd_event_xfer_complete (uint8_t rhport, uint8_t ep_addr, uint32_t xferred_bytes, uint8_t result, bool in_isr)
+{
+ dcd_event_t event = { .rhport = rhport, .event_id = DCD_EVENT_XFER_COMPLETE };
+
+ event.xfer_complete.ep_addr = ep_addr;
+ event.xfer_complete.len = xferred_bytes;
+ event.xfer_complete.result = result;
+
+ dcd_event_handler(&event, in_isr);
+}
+
+//--------------------------------------------------------------------+
+// Helper
+//--------------------------------------------------------------------+
+
+// Helper to parse an pair of endpoint descriptors (IN & OUT)
+bool usbd_open_edpt_pair(uint8_t rhport, tusb_desc_endpoint_t const* ep_desc, uint8_t xfer_type, uint8_t* ep_out, uint8_t* ep_in)
+{
+ for(int i=0; i<2; i++)
+ {
+ TU_ASSERT(TUSB_DESC_ENDPOINT == ep_desc->bDescriptorType &&
+ xfer_type == ep_desc->bmAttributes.xfer );
+
+ TU_ASSERT(dcd_edpt_open(rhport, ep_desc));
+
+ if ( tu_edpt_dir(ep_desc->bEndpointAddress) == TUSB_DIR_IN )
+ {
+ (*ep_in) = ep_desc->bEndpointAddress;
+ }else
+ {
+ (*ep_out) = ep_desc->bEndpointAddress;
+ }
+
+ ep_desc = (tusb_desc_endpoint_t const *) tu_desc_next(ep_desc);
+ }
+
+ return true;
+}
+
+// Helper to defer an isr function
+void usbd_defer_func(osal_task_func_t func, void* param, bool in_isr)
+{
+ dcd_event_t event =
+ {
+ .rhport = 0,
+ .event_id = USBD_EVT_FUNC_CALL,
+ };
+
+ event.func_call.func = func;
+ event.func_call.param = param;
+
+ dcd_event_handler(&event, in_isr);
+}
+
+#endif
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