From 2587a85a2c3203de469826a73b7cc3661e88e997 Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Wed, 30 Jan 2013 18:48:13 +0000
Subject: LM4F update from JP

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5586 42af7a65-404d-4744-a932-0658087f49c3
---
 nuttx/arch/arm/src/stm32/stm32_otgfsdev.c | 31 ++++++++++++++++++++++---------
 1 file changed, 22 insertions(+), 9 deletions(-)

(limited to 'nuttx/arch/arm/src/stm32/stm32_otgfsdev.c')

diff --git a/nuttx/arch/arm/src/stm32/stm32_otgfsdev.c b/nuttx/arch/arm/src/stm32/stm32_otgfsdev.c
index 94772b693..9307545a3 100644
--- a/nuttx/arch/arm/src/stm32/stm32_otgfsdev.c
+++ b/nuttx/arch/arm/src/stm32/stm32_otgfsdev.c
@@ -184,8 +184,9 @@
 #define STM32_TRACEERR_NOEP                 0x18
 #define STM32_TRACEERR_NOTCONFIGURED        0x19
 #define STM32_TRACEERR_EPOUTQEMPTY          0x1a
-#define STM32_TRACEERR_EPINQEMPTY           0x1b
+#define STM32_TRACEERR_EPINREQEMPTY         0x1b
 #define STM32_TRACEERR_NOOUTSETUP           0x1c
+#define STM32_TRACEERR_POLLTIMEOUT          0x1d
 
 /* Trace interrupt codes */
 
@@ -1084,6 +1085,7 @@ static void stm32_epin_request(FAR struct stm32_usbdev_s *priv,
   uint32_t regval;
 #ifdef ENABLE_DTXFSTS_POLLHACK
   int32_t timeout;
+  int avail;
 #endif
   uint8_t *buf;
   int nbytes;
@@ -1113,7 +1115,7 @@ static void stm32_epin_request(FAR struct stm32_usbdev_s *priv,
   privreq = stm32_rqpeek(privep);
   if (!privreq)
     {
-      usbtrace(TRACE_DEVERROR(STM32_TRACEERR_EPINQEMPTY), privep->epphy);
+      usbtrace(TRACE_DEVERROR(STM32_TRACEERR_EPINREQEMPTY), privep->epphy);
 
       /* There is no TX transfer in progress and no new pending TX
        * requests to send.  To stop transmitting any data on a particular
@@ -1221,18 +1223,28 @@ static void stm32_epin_request(FAR struct stm32_usbdev_s *priv,
 
 #ifdef ENABLE_DTXFSTS_POLLHACK
       /* If ENABLE_DTXFSTS_POLLHACK is enabled , then poll DTXFSTS until
-       * space in the TxFIFO is available.  If it doesn't become available,
-       * in a reasonable amount of time, then just pretend that it is.
+       * space in the TxFIFO is available.
        */
        
       for (timeout = 250000; timeout > 0; timeout--)
         {
-          regval  = stm32_getreg(regaddr);
-          if ((regval & OTGFS_DTXFSTS_MASK) >= nwords)
+          avail = stm32_getreg(regaddr) & OTGFS_DTXFSTS_MASK;
+          if (avail >= nwords)
             {
               break;
             }
         }
+
+      /* If it did not become available in a reasonable amount of time,
+       * then just return.  We should come back through this logic later
+       * anyway.
+       */
+
+      if (avail < nwords)
+        {
+          usbtrace(TRACE_DEVERROR(STM32_TRACEERR_POLLTIMEOUT), avail);
+          return;
+        }
 #else
       /* If ENABLE_DTXFSTS_POLLHACK is not enabled, then check once for
        * space in the TxFIFO.  If space in the TxFIFO is not available,
@@ -1290,11 +1302,12 @@ static void stm32_epin_request(FAR struct stm32_usbdev_s *priv,
   if (privreq->req.xfrd >= privreq->req.len && !privep->zlp)
     {
       usbtrace(TRACE_COMPLETE(privep->epphy), privreq->req.xfrd);
-      stm32_req_complete(privep, OK);
 
-      /* The endpoint is no longer transferring data */
+      /* We are finished with the request (although the transfer has not
+       * yet completed).
+       */
 
-      privep->active = false;
+      stm32_req_complete(privep, OK);
     }
 }
 
-- 
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