Takanobu Muraguchi
USB device stack
Dependents: USBMSD_step1 USBMSD_step1_5 picossd_step1_2cs
Diff: targets/TARGET_Silicon_Labs/src/em_usbdep.c
- Revision:
- 71:53949e6131f6
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Silicon_Labs/src/em_usbdep.c Thu Jul 27 12:14:04 2017 +0100
@@ -0,0 +1,446 @@
+/**************************************************************************//**
+ * @file em_usbdep.c
+ * @brief USB protocol stack library, USB device endpoint handlers.
+ * @version 3.20.14
+ ******************************************************************************
+ * @section License
+ * <b>(C) Copyright 2014 Silicon Labs, http://www.silabs.com</b>
+ *******************************************************************************
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ ******************************************************************************/
+
+#include "em_device.h"
+#if defined( USB_PRESENT ) && ( USB_COUNT == 1 )
+#include "em_usb.h"
+#if defined( USB_DEVICE )
+
+#include "em_usbtypes.h"
+#include "em_usbhal.h"
+#include "em_usbd.h"
+
+#ifdef USB_USE_PRINTF
+static const char *epStatusStr[] = {
+ "IDLE","TRANS","RECV","IN_S","OUT_S"
+};
+#endif
+
+/** @cond DO_NOT_INCLUDE_WITH_DOXYGEN */
+
+/*
+ * USBDEP_Ep0Handler() is called each time a packet has been transmitted
+ * or recieved on the default endpoint.
+ * A state machine navigate us through the phases of a control transfer
+ * according to "chapter 9" in the USB spec.
+ */
+#if !defined( USB_DOEP0INT_STUPPKTRCVD )
+void USBDEP_Ep0Handler( USBD_Device_TypeDef *device )
+{
+ int status;
+ USBD_Ep_TypeDef *ep;
+ static bool statusIn;
+ static uint32_t xferred;
+ static USB_XferCompleteCb_TypeDef callback;
+
+ ep = &device->ep[ 0 ];
+
+#ifdef __MBED__
+
+ (void)xferred;
+ (void)statusIn;
+ (void)status;
+
+ USB_PRINTF("USBDEP: ep0 %s, rem %ld, z %d\n", epStatusStr[ep->state], ep->remaining, ep->zlp);
+
+ if ( ( ep->state == D_EP_TRANSMITTING ) || ( ep->state == D_EP_RECEIVING ) )
+ {
+ ep->state = D_EP_IDLE;
+
+ if ( ep->xferCompleteCb )
+ {
+ callback = ep->xferCompleteCb;
+ ep->xferCompleteCb = NULL;
+ callback( USB_STATUS_OK, ep->xferred, ep->remaining );
+ }
+
+ USBDHAL_ReenableEp0Setup(device);
+ }
+ else
+ {
+ device->callbacks->setupCmd(device->setup);
+ }
+
+#else /* not __MBED__ */
+
+ switch ( ep->state )
+ {
+ case D_EP_IDLE:
+ ep->remaining = 0;
+ ep->zlp = 0;
+ callback = NULL;
+ statusIn = false;
+
+ status = USBDCH9_SetupCmd( device );
+
+ if ( status == USB_STATUS_REQ_ERR )
+ {
+ ep->in = true;
+ USBDHAL_StallEp( ep ); /* Stall Ep0 IN */
+ ep->in = false; /* OUT for next SETUP */
+ USBDHAL_StallEp( ep ); /* Stall Ep0 OUT */
+ USBDHAL_ReenableEp0Setup( device ); /* Prepare for next SETUP packet*/
+ }
+ else /* ( Status == USB_STATUS_OK ) */
+ {
+ if ( (ep->state == D_EP_RECEIVING) || (ep->state == D_EP_TRANSMITTING) )
+ {
+ callback = ep->xferCompleteCb;
+ }
+
+ if ( ep->state != D_EP_RECEIVING )
+ {
+ if ( ep->remaining )
+ {
+ /* Data will be sent to host, check if a ZLP must be appended */
+ if ( ( ep->remaining < device->setup->wLength ) &&
+ ( ep->remaining % ep->packetSize == 0 ) )
+ {
+ ep->zlp = 1;
+ }
+ }
+ else
+ {
+ /* Prepare for next SETUP packet*/
+ USBDHAL_ReenableEp0Setup( device );
+
+ /* No data stage, a ZLP may have been sent. If not, send one */
+
+ xferred = 0;
+ if ( ep->zlp == 0 )
+ {
+ USBD_Write( 0, NULL, 0, NULL ); /* ACK to host */
+ ep->state = D_EP0_IN_STATUS;
+ }
+ else
+ {
+ ep->state = D_EP_IDLE;
+ ep->in = false; /* OUT for next SETUP */
+ }
+ }
+ }
+ }
+ break;
+
+ case D_EP_RECEIVING:
+ if ( ep->remaining )
+ {
+ /* There is more data to receive */
+ USBD_ReArmEp0( ep );
+ }
+ else
+ {
+ status = USB_STATUS_OK;
+ if ( callback != NULL )
+ {
+ status = callback( USB_STATUS_OK, ep->xferred, 0 );
+ callback = NULL;
+ }
+
+ if ( status != USB_STATUS_OK )
+ {
+ ep->in = true;
+ USBDHAL_StallEp( ep ); /* Stall Ep0 IN */
+ ep->in = false; /* OUT for next SETUP */
+ USBDHAL_StallEp( ep ); /* Stall Ep0 OUT */
+ USBDHAL_ReenableEp0Setup( device ); /* Prepare for next SETUP pkt. */
+ ep->state = D_EP_IDLE;
+ }
+ else /* Everything OK, send a ZLP (ACK) to host */
+ {
+ USBDHAL_ReenableEp0Setup( device );/* Prepare for next SETUP packet*/
+
+ ep->state = D_EP_IDLE; /* USBD_Write() sets state back*/
+ /* to EP_TRANSMITTING */
+ USBD_Write( 0, NULL, 0, NULL );
+ ep->state = D_EP0_IN_STATUS;
+ }
+ }
+ break;
+
+ case D_EP_TRANSMITTING:
+ if ( ep->remaining )
+ {
+ /* There is more data to transmit */
+ USBD_ReArmEp0( ep );
+ }
+ else
+ {
+ /* All data transferred, is a ZLP packet needed ? */
+ if ( ep->zlp == 1 )
+ {
+ xferred = ep->xferred;
+ ep->state = D_EP_IDLE; /* USBD_Write() sets state back */
+ /* to EP_TRANSMITTING */
+ USBD_Write( 0, NULL, 0, NULL ); /* Send ZLP */
+ ep->zlp = 2;
+ }
+ else
+ {
+ if ( ep->zlp == 0 )
+ {
+ xferred = ep->xferred;
+ }
+
+ ep->state = D_EP_IDLE;
+ USBD_Read( 0, NULL, 0, NULL ); /* Get ZLP packet (ACK) from host */
+ statusIn = true;
+ ep->state = D_EP0_OUT_STATUS;
+ }
+ }
+ break;
+
+ case D_EP0_IN_STATUS:
+ case D_EP0_OUT_STATUS:
+ if ( statusIn )
+ {
+ USBDHAL_ReenableEp0Setup( device );
+ }
+
+ if ( callback != NULL )
+ {
+ callback( USB_STATUS_OK, xferred, 0 );
+ }
+
+ ep->state = D_EP_IDLE;
+ ep->in = false; /* OUT for next SETUP */
+ break;
+
+ default:
+ EFM_ASSERT( false );
+ break;
+ }
+#endif /* __MBED__ */
+}
+#endif
+
+#if defined( USB_DOEP0INT_STUPPKTRCVD )
+void USBDEP_Ep0Handler( USBD_Device_TypeDef *device )
+{
+ int status;
+ USBD_Ep_TypeDef *ep;
+ static uint32_t xferred;
+ static USB_XferCompleteCb_TypeDef callback;
+
+#ifdef __MBED__
+
+ (void)xferred;
+ (void)status;
+
+ ep = &device->ep[ 0 ];
+
+ if ( ( ep->state == D_EP_TRANSMITTING ) || ( ep->state == D_EP_RECEIVING ) )
+ {
+ ep->state = D_EP_IDLE;
+
+ if ( ep->xferCompleteCb )
+ {
+ callback = ep->xferCompleteCb;
+ ep->xferCompleteCb = NULL;
+ callback( USB_STATUS_OK, ep->xferred, ep->remaining );
+ }
+
+ USBDHAL_StartEp0Setup( dev );
+ }
+ else
+ {
+ device->callbacks->setupCmd(device->setup);
+ }
+
+#else
+
+ ep = &device->ep[ 0 ];
+
+ switch ( ep->state )
+ {
+ case D_EP_IDLE:
+ ep->zlp = 0;
+ ep->remaining = 0;
+ callback = NULL;
+
+ status = USBDCH9_SetupCmd( device );
+
+ if ( status == USB_STATUS_REQ_ERR )
+ {
+ ep->in = true;
+ USBDHAL_StallEp( ep ); /* Stall Ep0 IN */
+ ep->in = false; /* OUT for next SETUP */
+ USBDHAL_StallEp( ep ); /* Stall Ep0 OUT */
+ USBDHAL_StartEp0Setup( dev ); /* Prepare for next SETUP packet*/
+ }
+ else /* ( Status == USB_STATUS_OK ) */
+ {
+ if ( (ep->state == D_EP_RECEIVING) || (ep->state == D_EP_TRANSMITTING) )
+ {
+ callback = ep->xferCompleteCb;
+ }
+
+ if ( ep->state != D_EP_RECEIVING )
+ {
+ if ( ep->remaining )
+ {
+ /* Data will be sent to host, check if a ZLP must be appended */
+ if ( ( ep->remaining < device->setup->wLength ) &&
+ ( ep->remaining % ep->packetSize == 0 ) )
+ {
+ ep->zlp = 1;
+ }
+ }
+ else
+ {
+ /* No data stage, a ZLP may have been sent. If not, send one */
+ xferred = 0;
+ if ( ep->zlp == 0 )
+ {
+ ep->state = D_EP_IDLE;
+ USBD_Write( 0, NULL, 0, NULL ); /* ACK to host */
+ ep->state = D_EP0_IN_STATUS;
+ }
+ }
+ }
+ }
+ break;
+
+ case D_EP_RECEIVING:
+ if ( ep->remaining )
+ {
+ ep->in = false;
+ USBD_ReArmEp0( ep );
+ }
+ else
+ {
+ status = USB_STATUS_OK;
+ if ( callback != NULL )
+ {
+ status = callback( USB_STATUS_OK, ep->xferred, 0 );
+ callback = NULL;
+ }
+
+ if ( status != USB_STATUS_OK )
+ {
+ ep->in = true;
+ USBDHAL_StallEp( ep ); /* Stall Ep0 IN */
+ ep->in = false; /* OUT for next SETUP */
+ USBDHAL_StallEp( ep ); /* Stall Ep0 OUT */
+ USBDHAL_StartEp0Setup( dev ); /* Prepare for next SETUP pkt. */
+ ep->state = D_EP_IDLE;
+ }
+ else
+ {
+
+ USBDHAL_StartEp0Setup( dev ); /* Prepare for next SETUP packet*/
+ ep->state = D_EP_IDLE; /* USBD_Write() sets state back */
+ /* to EP_TRANSMITTING */
+ USBD_Write( 0, NULL, 0, NULL );
+ ep->state = D_EP0_IN_STATUS;
+ }
+ }
+ break;
+
+ case D_EP_TRANSMITTING:
+ if ( ep->remaining )
+ {
+ ep->in = true;
+ USBD_ReArmEp0( ep );
+ }
+ else
+ {
+ if ( ep->zlp == 1 )
+ {
+ xferred = ep->xferred;
+ ep->state = D_EP_IDLE; /* USBD_Write() sets state back */
+ /* to EP_TRANSMITTING */
+ USBD_Write( 0, NULL, 0, NULL ); /* Send ZLP */
+ ep->zlp = 2;
+ }
+ else
+ {
+ if ( ep->zlp == 0 )
+ {
+ xferred = ep->xferred;
+ }
+
+ ep->state = D_EP_IDLE;
+ USBD_Read( 0, NULL, 0, NULL ); /* Get ZLP packet (ACK) from host */
+ ep->state = D_EP0_OUT_STATUS;
+ }
+ }
+ break;
+
+ case D_EP0_IN_STATUS:
+ if ( ( USB->DOEP0CTL & USB_DOEP0CTL_EPENA ) == 0 )
+ {
+ /* Prepare for more SETUP Packets */
+ USBDHAL_StartEp0Setup( dev );
+ }
+ if ( callback != NULL )
+ {
+ callback( USB_STATUS_OK, xferred, 0 );
+ }
+ ep->state = D_EP_IDLE;
+ ep->in = false; /* OUT for next SETUP */
+ break;
+
+ case D_EP0_OUT_STATUS:
+ USBDHAL_StartEp0Setup( dev ); /* Prepare for more SETUP Packets */
+ if ( callback != NULL )
+ {
+ callback( USB_STATUS_OK, xferred, 0 );
+ }
+ ep->state = D_EP_IDLE;
+ ep->in = false; /* OUT for next SETUP */
+ break;
+ }
+#endif /* __MBED__ */
+}
+#endif
+
+/*
+ * USBDEP_EpHandler() is called each time a packet has been transmitted
+ * or recieved on an endpoint other than the default endpoint.
+ */
+void USBDEP_EpHandler( uint8_t epAddr )
+{
+ USB_XferCompleteCb_TypeDef callback;
+ USBD_Ep_TypeDef *ep = USBD_GetEpFromAddr( epAddr );
+
+ if ( ( ep->state == D_EP_TRANSMITTING ) || ( ep->state == D_EP_RECEIVING ) )
+ {
+ ep->state = D_EP_IDLE;
+ if ( ep->xferCompleteCb )
+ {
+ callback = ep->xferCompleteCb;
+ ep->xferCompleteCb = NULL;
+ callback( USB_STATUS_OK, ep->xferred, ep->remaining );
+ }
+ }
+ else
+ {
+ EFM_ASSERT( false );
+ }
+}
+
+/** @endcond */
+
+#endif /* defined( USB_DEVICE ) */
+#endif /* defined( USB_PRESENT ) && ( USB_COUNT == 1 ) */