From 931d7909f570313916e12886fa6550ea38653cfd Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Fri, 7 Sep 2012 13:35:58 +0000
Subject: [PATCH] If serial DMA enabled, re-initialize serial console

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5106 42af7a65-404d-4744-a932-0658087f49c3
---
 arch/arm/src/stm32/stm32_serial.c |  9 ++++++++-
 arch/arm/src/stm32/stm32_uart.h   | 17 +++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/arch/arm/src/stm32/stm32_serial.c b/arch/arm/src/stm32/stm32_serial.c
index b90e4ee976..45d6858235 100644
--- a/arch/arm/src/stm32/stm32_serial.c
+++ b/arch/arm/src/stm32/stm32_serial.c
@@ -1835,7 +1835,14 @@ void up_serialinit(void)
 #if CONSOLE_UART > 0
   (void)uart_register("/dev/console", &uart_devs[CONSOLE_UART - 1]->dev);
   (void)uart_register("/dev/ttyS0",   &uart_devs[CONSOLE_UART - 1]->dev);
-#endif
+
+  /* If we need to re-initialise the console to enable DMA do that here. */
+
+# ifdef SERIAL_HAVE_CONSOLE_DMA
+  up_dma_setup(&uart_devs[CONSOLE_UART - 1]->dev);
+# endif
+
+#endif /* CONSOLE_UART > 0 */
 
   /* Register all remaining USARTs */
 
diff --git a/arch/arm/src/stm32/stm32_uart.h b/arch/arm/src/stm32/stm32_uart.h
index f51265b18f..7888d63163 100644
--- a/arch/arm/src/stm32/stm32_uart.h
+++ b/arch/arm/src/stm32/stm32_uart.h
@@ -189,6 +189,23 @@
 #  define SERIAL_HAVE_DMA 1
 #endif
 
+/* Is DMA used on the console UART? */
+
+#undef SERIAL_HAVE_CONSOLE_DMA
+#if defined(CONFIG_USART1_SERIAL_CONSOLE) && defined(CONFIG_USART1_RXDMA)
+#  define SERIAL_HAVE_CONSOLE_DMA 1
+#elif defined(CONFIG_USART2_SERIAL_CONSOLE) && defined(CONFIG_USART2_RXDMA)
+#  define SERIAL_HAVE_CONSOLE_DMA 1
+#elif defined(CONFIG_USART3_SERIAL_CONSOLE) && defined(CONFIG_USART3_RXDMA)
+#  define SERIAL_HAVE_CONSOLE_DMA 1
+#elif defined(CONFIG_UART4_SERIAL_CONSOLE) && !efined(CONFIG_UART4_RXDMA)
+#  define SERIAL_HAVE_CONSOLE_DMA 1
+#elif defined(CONFIG_UART5_SERIAL_CONSOLE) && defined(CONFIG_UART5_RXDMA)
+#  define SERIAL_HAVE_CONSOLE_DMA 1
+#elif defined(CONFIG_USART6_SERIAL_CONSOLE) && !efined(CONFIG_USART6_RXDMA)
+#  define SERIAL_HAVE_CONSOLE_DMA 1
+#endif
+
 /* Is DMA used on all (enabled) USARTs */
 
 #define SERIAL_HAVE_ONLY_DMA 1