Add SAM3U clock and systick init logic

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2511 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 208 insertions, 0 deletions

diff --git a/nuttx/arch/arm/src/sam3u/sam3u_lowputc.c b/nuttx/arch/arm/src/sam3u/sam3u_lowputc.c
new file mode 100755
index 000000000..399950a83
--- /dev/null
+++ b/nuttx/arch/arm/src/sam3u/sam3u_lowputc.c
@@ -0,0 +1,208 @@
+/**************************************************************************
+ * arch/arm/src/sam3u/sam3u_lowputc.c
+ *
+ *   Copyright (C) 2010 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ **************************************************************************/
+
+/**************************************************************************
+ * Included Files
+ **************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+
+#include <arch/irq.h>
+#include <arch/board/board.h>
+
+#include "up_internal.h"
+#include "up_arch.h"
+
+#include "sam3u_internal.h"
+#include "sam3u_pmc.h"
+
+/**************************************************************************
+ * Private Definitions
+ **************************************************************************/
+
+/* Configuration **********************************************************/
+
+#ifndef CONFIG_USART0_ISUART
+#  undef CONFIG_SAM3U_USART0
+#endif
+#ifndef CONFIG_USART1_ISUART
+#  undef CONFIG_SAM3U_USART1
+#endif
+#ifndef CONFIG_USART2_ISUART
+#  undef CONFIG_SAM3U_USART2
+#endif
+#ifndef CONFIG_USART3_ISUART
+#  undef CONFIG_SAM3U_USART3
+#endif
+
+/* Is there a serial console? It could be on the UART, or USARTn */
+
+#if defined(CONFIG_UART_SERIAL_CONSOLE) && defined(CONFIG_SAM3U_UART)
+#  undef CONFIG_USART0_SERIAL_CONSOLE
+#  undef CONFIG_USART1_SERIAL_CONSOLE
+#  undef CONFIG_USART2_SERIAL_CONSOLE
+#  undef CONFIG_USART3_SERIAL_CONSOLE
+#  define HAVE_CONSOLE 1
+#elif defined(CONFIG_USART0_SERIAL_CONSOLE) && defined(CONFIG_SAM3U_USART0)
+#  undef CONFIG_USART_SERIAL_CONSOLE
+#  undef CONFIG_USART1_SERIAL_CONSOLE
+#  undef CONFIG_USART2_SERIAL_CONSOLE
+#  undef CONFIG_USART3_SERIAL_CONSOLE
+#  define HAVE_CONSOLE 1
+#elif defined(CONFIG_USART1_SERIAL_CONSOLE) && defined(CONFIG_SAM3U_USART1)
+#  undef CONFIG_USART_SERIAL_CONSOLE
+#  undef CONFIG_USART0_SERIAL_CONSOLE
+#  undef CONFIG_USART2_SERIAL_CONSOLE
+#  undef CONFIG_USART3_SERIAL_CONSOLE
+#  define HAVE_CONSOLE 1
+#elif defined(CONFIG_USART2_SERIAL_CONSOLE) && defined(CONFIG_SAM3U_USART2)
+#  undef CONFIG_USART_SERIAL_CONSOLE
+#  undef CONFIG_USART0_SERIAL_CONSOLE
+#  undef CONFIG_USART1_SERIAL_CONSOLE
+#  undef CONFIG_USART3_SERIAL_CONSOLE
+#  define HAVE_CONSOLE 1
+#elif defined(CONFIG_USART3_SERIAL_CONSOLE) && defined(CONFIG_SAM3U_USART3)
+#  undef CONFIG_USART_SERIAL_CONSOLE
+#  undef CONFIG_USART0_SERIAL_CONSOLE
+#  undef CONFIG_USART1_SERIAL_CONSOLE
+#  undef CONFIG_USART2_SERIAL_CONSOLE
+#  define HAVE_CONSOLE 1
+#else
+#  undef CONFIG_USART_SERIAL_CONSOLE
+#  undef CONFIG_USART0_SERIAL_CONSOLE
+#  undef CONFIG_USART1_SERIAL_CONSOLE
+#  undef CONFIG_USART2_SERIAL_CONSOLE
+#  undef CONFIG_USART3_SERIAL_CONSOLE
+#  undef HAVE_CONSOLE
+#endif
+
+/* Select USART parameters for the selected console */
+
+#if defined(CONFIG_UART_SERIAL_CONSOLE)
+#  define SAM3U_CONSOLE_BASE     SAM3U_UART_BASE
+#  define SAM3U_CONSOLE_BAUD     CONFIG_USART_BAUD
+#  define SAM3U_CONSOLE_BITS     CONFIG_USART_BITS
+#  define SAM3U_CONSOLE_PARITY   CONFIG_USART_PARITY
+#  define SAM3U_CONSOLE_2STOP    CONFIG_USART_2STOP
+#elif defined(CONFIG_USART0_SERIAL_CONSOLE)
+#  define SAM3U_CONSOLE_BASE     SAM3U_USART0_BASE
+#  define SAM3U_CONSOLE_BAUD     CONFIG_USART0_BAUD
+#  define SAM3U_CONSOLE_BITS     CONFIG_USART0_BITS
+#  define SAM3U_CONSOLE_PARITY   CONFIG_USART0_PARITY
+#  define SAM3U_CONSOLE_2STOP    CONFIG_USART0_2STOP
+#elif defined(CONFIG_USART1_SERIAL_CONSOLE)
+#  define SAM3U_CONSOLE_BASE     SAM3U_USART1_BASE
+#  define SAM3U_CONSOLE_BAUD     CONFIG_USART1_BAUD
+#  define SAM3U_CONSOLE_BITS     CONFIG_USART1_BITS
+#  define SAM3U_CONSOLE_PARITY   CONFIG_USART1_PARITY
+#  define SAM3U_CONSOLE_2STOP    CONFIG_USART1_2STOP
+#elif defined(CONFIG_USART2_SERIAL_CONSOLE)
+#  define SAM3U_CONSOLE_BASE     SAM3U_USART2_BASE
+#  define SAM3U_CONSOLE_BAUD     CONFIG_USART2_BAUD
+#  define SAM3U_CONSOLE_BITS     CONFIG_USART2_BITS
+#  define SAM3U_CONSOLE_PARITY   CONFIG_USART2_PARITY
+#  define SAM3U_CONSOLE_2STOP    CONFIG_USART2_2STOP
+#elif defined(CONFIG_USART3_SERIAL_CONSOLE)
+#  define SAM3U_CONSOLE_BASE     SAM3U_USART3_BASE
+#  define SAM3U_CONSOLE_BAUD     CONFIG_USART3_BAUD
+#  define SAM3U_CONSOLE_BITS     CONFIG_USART3_BITS
+#  define SAM3U_CONSOLE_PARITY   CONFIG_USART3_PARITY
+#  define SAM3U_CONSOLE_2STOP    CONFIG_USART3_2STOP
+#else
+#  error "No CONFIG_U[S]ARTn_SERIAL_CONSOLE Setting"
+#endif
+
+/**************************************************************************
+ * Private Types
+ **************************************************************************/
+
+/**************************************************************************
+ * Private Function Prototypes
+ **************************************************************************/
+
+/**************************************************************************
+ * Global Variables
+ **************************************************************************/
+
+/**************************************************************************
+ * Private Variables
+ **************************************************************************/
+
+/**************************************************************************
+ * Private Functions
+ **************************************************************************/
+
+/**************************************************************************
+ * Public Functions
+ **************************************************************************/
+
+/**************************************************************************
+ * Name: up_lowputc
+ *
+ * Description:
+ *   Output one byte on the serial console
+ *
+ **************************************************************************/
+
+void up_lowputc(char ch)
+{
+#warning "To be provided"
+}
+
+/**************************************************************************
+ * Name: sam3u_lowsetup
+ *
+ * Description:
+ *   This performs basic initialization of the USART used for the serial
+ *   console.  Its purpose is to get the console output availabe as soon
+ *   as possible.
+ *
+ **************************************************************************/
+
+void sam3u_lowsetup(void)
+{
+  uint32_t regval;
+
+#warning "To be provided"
+  /* Enable clocking for the UART */
+
+  regval = getreg32(SAM3U_PMC_PCER);
+  regval |= (1 << SAM3U_PID_UART);
+  putreg32(regval, SAM3U_PMC_PCER);
+}
+
+