Fixes STM32F107 DMA issue

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5182 42af7a65-404d-4744-a932-0658087f49c3

ChangeLog

@@ -3386,3 +3386,7 @@
 	  case now (either space or a fieldwidth must be provided).  But
 	  at least some of the bad logic that attempted to handle this
 	  case has been removed (noted by Kate).
+	* arch/arm/src/stm32/stm32_eth.c:  DMA buffer sizes must be an
+	  even multiple of 4, 8, or 16 bytes.
+	* arch/arm/src/stm32/stm32_idle.c:  Fixes STM32F107 DMA issues:
+	  We cannot go into sleep mode while Ethernet is actively DMAing.

arch/arm/src/stm32/chip/stm32_eth.h

@@ -711,7 +711,9 @@
 /* RDES0: Receive descriptor Word0 */
 
 #define ETH_RDES0_PCE                (1 << 0)  /* Bit 0:  Payload checksum error */
-#define ETH_RDES0_ESA                (1 << 0)  /* Bit 0:  Extended status available */
+#if defined(CONFIG_STM32_STM32F20XX) || defined(CONFIG_STM32_STM32F40XX)
+#  define ETH_RDES0_ESA              (1 << 0)  /* Bit 0:  Extended status available */
+#endif
 #define ETH_RDES0_CE                 (1 << 1)  /* Bit 1:  CRC error */
 #define ETH_RDES0_DBE                (1 << 2)  /* Bit 2:  Dribble bit error */
 #define ETH_RDES0_RE                 (1 << 3)  /* Bit 3:  Receive error */
@@ -737,6 +739,7 @@
 
 #define ETH_RDES1_RBS1_SHIFT         (0)       /* Bits 0-12: Receive buffer 1 size */
 #define ETH_RDES1_RBS1_MASK          (0x1fff << ETH_RDES1_RBS1_SHIFT)
+                                               /* Bit 13: Reserved */
 #define ETH_RDES1_RCH                (1 << 14) /* Bit 14: Second address chained */
 #define ETH_RDES1_RER                (1 << 15) /* Bit 15: Receive end of ring */
 #define ETH_RDES1_RBS2_SHIFT         (16)      /* Bits 16-28: Receive buffer 2 size */

arch/arm/src/stm32/stm32_eth.c

@@ -186,10 +186,12 @@
 #endif
 
 /* Add 4 to the configured buffer size to account for the 2 byte checksum
- * memory needed at the end of the maximum size packet.
+ * memory needed at the end of the maximum size packet.  Buffer sizes must
+ * be an even multiple of 4, 8, or 16 bytes (depending on buswidth).  We
+ * will use the 16-byte alignment in all cases.
  */
 
-#define OPTIMAL_ETH_BUFSIZE (CONFIG_NET_BUFSIZE+4)
+#define OPTIMAL_ETH_BUFSIZE ((CONFIG_NET_BUFSIZE + 4 + 15) & ~15)
 
 #ifndef CONFIG_STM32_ETH_BUFSIZE
 #  define CONFIG_STM32_ETH_BUFSIZE OPTIMAL_ETH_BUFSIZE
@@ -199,6 +201,10 @@
 #  error "CONFIG_STM32_ETH_BUFSIZE is too large"
 #endif
 
+#if (CONFIG_STM32_ETH_BUFSIZE & 15) != 0
+#  error "CONFIG_STM32_ETH_BUFSIZE must be aligned"
+#endif
+
 #if CONFIG_STM32_ETH_BUFSIZE != OPTIMAL_ETH_BUFSIZE
 #  warning "You using an incomplete/untested configuration"
 #endif
@@ -1470,9 +1476,6 @@ static int stm32_recvframe(FAR struct stm32_ethmac_s *priv)
         { 
           priv->segments++;
 
-          nllvdbg("rxhead: %p rxcurr: %p segments: %d\n",
-              priv->rxhead, priv->rxcurr, priv->segments);
-
           /* Check if the there is only one segment in the frame */
 
           if (priv->segments == 1)
@@ -1484,6 +1487,9 @@ static int stm32_recvframe(FAR struct stm32_ethmac_s *priv)
               rxcurr = priv->rxcurr;
             }
 
+          nllvdbg("rxhead: %p rxcurr: %p segments: %d\n",
+              priv->rxhead, priv->rxcurr, priv->segments);
+
           /* Check if any errors are reported in the frame */
 
           if ((rxdesc->rdes0 & ETH_RDES0_ES) == 0)

arch/arm/src/stm32/stm32_idle.c

@@ -45,6 +45,7 @@
 
 #include <arch/irq.h>
 
+#include "chip.h"
 #include "stm32_pm.h"
 #include "up_internal.h"
 
@@ -178,11 +179,31 @@ void up_idle(void)
 
   up_idlepm();
 
-  /* Sleep until an interrupt occurs to save power */
+  /* Sleep until an interrupt occurs to save power.
+   *
+   * NOTE:  There is an STM32F107 errata that is fixed by the following
+   * workaround:
+   *
+   * "2.17.11 Ethernet DMA not working after WFI/WFE instruction
+   *  Description
+   *  If a WFI/WFE instruction is executed to put the system in sleep mode
+   *    while the Ethernet MAC master clock on the AHB bus matrix is ON and all
+   *    remaining masters clocks are OFF, the Ethernet DMA will be not able to
+   *    perform any AHB master accesses during sleep mode."
+   *
+   *  Workaround
+   *    Enable DMA1 or DMA2 clocks in the RCC_AHBENR register before 
+   *    executing the WFI/WFE instruction."
+   *
+   * Here the workaround is just don't go into SLEEP mode for the connectivity
+   * line parts if Ethernet is enabled.
+   */
 
+#if !defined(CONFIG_STM32_CONNECTIVITYLINE) || !defined(CONFIG_STM32_ETHMAC)
   BEGIN_IDLE();
   asm("WFI");
   END_IDLE();
 #endif
+#endif
 }
 

configs/fire-stm32v2/nsh/defconfig

@@ -456,7 +456,7 @@ CONFIG_NET_BUFSIZE=562
 CONFIG_NET_TCP=y
 CONFIG_NET_TCP_CONNS=16
 CONFIG_NET_MAX_LISTENPORTS=16
-CONFIG_NET_TCP_READAHEAD_BUFSIZE=562
+# CONFIG_NET_TCP_READAHEAD_BUFSIZE=562
 CONFIG_NET_NTCP_READAHEAD_BUFFERS=8
 CONFIG_NET_TCP_RECVDELAY=0
 # CONFIG_NET_TCPBACKLOG is not set
@@ -469,7 +469,7 @@ CONFIG_NET_ICMP_PING=y
 # CONFIG_NET_PINGADDRCONF is not set
 # CONFIG_NET_IGMP is not set
 CONFIG_NET_STATISTICS=y
-CONFIG_NET_RECEIVE_WINDOW=562
+# CONFIG_NET_RECEIVE_WINDOW=562
 CONFIG_NET_ARPTAB_SIZE=16
 # CONFIG_NET_ARP_IPIN is not set
 

configs/shenzhou/nsh/defconfig

@@ -388,7 +388,7 @@ CONFIG_NET_BUFSIZE=562
 CONFIG_NET_TCP=y
 CONFIG_NET_TCP_CONNS=40
 CONFIG_NET_MAX_LISTENPORTS=40
-CONFIG_NET_TCP_READAHEAD_BUFSIZE=562
+# CONFIG_NET_TCP_READAHEAD_BUFSIZE=562
 CONFIG_NET_NTCP_READAHEAD_BUFFERS=16
 CONFIG_NET_TCP_RECVDELAY=0
 CONFIG_NET_TCPBACKLOG=y
@@ -401,7 +401,7 @@ CONFIG_NET_ICMP_PING=y
 # CONFIG_NET_PINGADDRCONF is not set
 # CONFIG_NET_IGMP is not set
 CONFIG_NET_STATISTICS=y
-CONFIG_NET_RECEIVE_WINDOW=562
+# CONFIG_NET_RECEIVE_WINDOW=562
 CONFIG_NET_ARPTAB_SIZE=16
 # CONFIG_NET_ARP_IPIN is not set
 

configs/stm3240g-eval/discover/defconfig

@@ -388,7 +388,7 @@ CONFIG_NET_BUFSIZE=650
 CONFIG_NET_TCP=y
 CONFIG_NET_TCP_CONNS=40
 CONFIG_NET_MAX_LISTENPORTS=40
-CONFIG_NET_TCP_READAHEAD_BUFSIZE=562
+# CONFIG_NET_TCP_READAHEAD_BUFSIZE=562
 CONFIG_NET_NTCP_READAHEAD_BUFFERS=16
 CONFIG_NET_TCP_RECVDELAY=0
 CONFIG_NET_TCPBACKLOG=y
@@ -401,7 +401,7 @@ CONFIG_NET_ICMP_PING=y
 # CONFIG_NET_PINGADDRCONF is not set
 # CONFIG_NET_IGMP is not set
 CONFIG_NET_STATISTICS=y
-CONFIG_NET_RECEIVE_WINDOW=562
+# CONFIG_NET_RECEIVE_WINDOW=562
 CONFIG_NET_ARPTAB_SIZE=16
 CONFIG_NET_ARP_IPIN=y
 

configs/stm3240g-eval/xmlrpc/defconfig

@@ -382,7 +382,7 @@ CONFIG_NET_BUFSIZE=650
 CONFIG_NET_TCP=y
 CONFIG_NET_TCP_CONNS=40
 CONFIG_NET_MAX_LISTENPORTS=40
-CONFIG_NET_TCP_READAHEAD_BUFSIZE=562
+# CONFIG_NET_TCP_READAHEAD_BUFSIZE=562
 CONFIG_NET_NTCP_READAHEAD_BUFFERS=16
 CONFIG_NET_TCP_RECVDELAY=0
 CONFIG_NET_TCPBACKLOG=y
@@ -395,7 +395,7 @@ CONFIG_NET_ICMP_PING=y
 # CONFIG_NET_PINGADDRCONF is not set
 # CONFIG_NET_IGMP is not set
 CONFIG_NET_STATISTICS=y
-CONFIG_NET_RECEIVE_WINDOW=562
+# CONFIG_NET_RECEIVE_WINDOW=562
 CONFIG_NET_ARPTAB_SIZE=16
 CONFIG_NET_ARP_IPIN=y