Fixed bug #1116.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@13776 27425a3e-05d8-49a3-a47f-9c15f0e5edd8

os/hal/include/hal_wspi.h

@@ -71,9 +71,10 @@ typedef enum {
   WSPI_UNINIT = 0,                  /**< Not initialized.                   */
   WSPI_STOP = 1,                    /**< Stopped.                           */
   WSPI_READY = 2,                   /**< Ready.                             */
-  WSPI_ACTIVE = 3,                  /**< Exchanging data.                   */
-  WSPI_COMPLETE = 4,                /**< Asynchronous operation complete.   */
-  WSPI_MEMMAP = 5                   /**< In memory mapped mode.             */
+  WSPI_SEND = 3,                    /**< Sending data.                      */
+  WSPI_RECEIVE = 4,                 /**< Receiving data.                    */
+  WSPI_COMPLETE = 5,                /**< Asynchronous operation complete.   */
+  WSPI_MEMMAP = 6                   /**< In memory mapped mode.             */
 } wspistate_t;
 
 /**
@@ -274,7 +275,7 @@ struct hal_wspi_driver {
   osalDbgAssert(((cmdp)->cfg & WSPI_CFG_DATA_MODE_MASK) ==                  \
                 WSPI_CFG_DATA_MODE_NONE,                                    \
                 "data mode specified");                                     \
-  (wspip)->state = WSPI_ACTIVE;                                             \
+  (wspip)->state = WSPI_SEND;                                               \
   wspi_lld_command(wspip, cmdp);                                            \
 }
 
@@ -294,7 +295,7 @@ struct hal_wspi_driver {
   osalDbgAssert(((cmdp)->cfg & WSPI_CFG_DATA_MODE_MASK) !=                  \
                 WSPI_CFG_DATA_MODE_NONE,                                    \
                 "data mode required");                                      \
-  (wspip)->state = WSPI_ACTIVE;                                             \
+  (wspip)->state = WSPI_SEND;                                               \
   wspi_lld_send(wspip, cmdp, n, txbuf);                                     \
 }
 
@@ -314,7 +315,7 @@ struct hal_wspi_driver {
   osalDbgAssert(((cmdp)->cfg & WSPI_CFG_DATA_MODE_MASK) !=                  \
                 WSPI_CFG_DATA_MODE_NONE,                                    \
                 "data mode required");                                      \
-  (wspip)->state = WSPI_ACTIVE;                                             \
+  (wspip)->state = WSPI_RECEIVE;                                            \
   wspi_lld_receive(wspip, cmdp, n, rxbuf);                                  \
 }
 

os/hal/ports/STM32/LLD/QUADSPIv1/hal_wspi_lld.c

@@ -94,7 +94,14 @@ static void wspi_lld_serve_interrupt(WSPIDriver *wspip) {
      operation. Race condition hidden here.*/
   while (dmaStreamGetTransactionSize(wspip->dma) > 0U)
     ;
-  dmaStreamDisable(wspip->dma);
+
+  /* Handling of errata: Extra data written in the FIFO at the end of a
+     read transfer.*/
+  if (wspip->state == WSPI_RECEIVE) {
+    while ((wspip->qspi->SR & QUADSPI_SR_BUSY) != 0U) {
+      (void) wspip->qspi->DR;
+    }
+  }
 }
 
 /*===========================================================================*/

readme.txt

@@ -100,6 +100,8 @@
        MEMS Accelerometers.
 - NEW: Safer messages mechanism for sandboxes (to be backported to 20.3.1).
 - NEW: Added latency measurement test application.
+- FIX: Fixed STM32 QSPI errata workaround (bug #1116)
+       (backported to 20.3.2).
 - FIX: Fixed wrong condition in STM32 BDMAv1 driver (bug #1115)
        (backported to 20.3.2).
 - FIX: Fixed HSI48 not getting enabled on STM32H7 (bug #1114)

testhal/STM32/multi/WSPI-MFS/.cproject

@@ -179,4 +179,5 @@
 			<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile"/>
 		</scannerConfigBuildInfo>
 	</storageModule>
+	<storageModule moduleId="org.eclipse.cdt.make.core.buildtargets"/>
 </cproject>