nrf5x: refactor device control transfer.

- make control transfer as part of usbd. Class driver must use
usbd_control_ API() instead of dcd_ api.
- change the signature of class driver's control_request
- allow control request complete to stall in staus stage
- move control request parser & handling to usbd.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/device/dcd.h b/src/device/dcd.h
index ff836f405..bd0ea852e 100644
--- a/src/device/dcd.h
+++ b/src/device/dcd.h
@@ -124,6 +124,10 @@ void dcd_event_xfer_complete (uint8_t rhport, uint8_t ep_addr, uint32_t xferred_
 

 /*------------------------------------------------------------------*/

 /* Endpoint API

+ * Note:

+ * - Address of control endpoint OUT is 0x00, In is 0x80

+ * - When stalling control endpoint both control OUT and IN must be stalled

+ * (according to USB spec, stalled control is only recovered with setup token)

  *------------------------------------------------------------------*/

 bool dcd_edpt_open        (uint8_t rhport, tusb_desc_endpoint_t const * p_endpoint_desc);

 bool dcd_edpt_xfer        (uint8_t rhport, uint8_t ep_addr, uint8_t * buffer, uint16_t total_bytes);