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SAMA5: Add logic to initialize SAMA5D3x-EK on-board SDRAM

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This commit is contained in:
Gregory Nutt
2013-08-01 16:58:55 -06:00
parent b308cb05f9
commit 22b491b8e4
4 changed files with 603 additions and 13 deletions
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configs/sama5d3x-ek/src/Makefile
+4
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@@ -46,6 +46,10 @@ ifeq ($(CONFIG_HAVE_CXX),y)
CSRCS += sam_cxxinitialize.c
endif
ifeq ($(CONFIG_SAMA5_DDRCS),y)
CSRCS += sam_sdram.c
endif
ifeq ($(CONFIG_SAMA5_BOOT_CS0FLASH),y)
CSRCS += sam_norflash.c
endif
configs/sama5d3x-ek/src/sam_norflash.c
+20 -13
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@@ -1,9 +1,16 @@
/************************************************************************************
/****************************************************************************
* configs/sama5d3x-ek/src/sam_norflash.c
*
* Copyright (C) 2013 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Most of this file derives from Atmel sample code for the SAMA5D3x-EK
* board. That sample code has licensing that is compatible with the NuttX
* modified BSD license:
*
* Copyright (c) 2012, Atmel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
@@ -14,8 +21,8 @@
* 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
* 3. Neither the name NuttX nor Atmel 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
@@ -31,11 +38,11 @@
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
****************************************************************************/
/************************************************************************************
/****************************************************************************
* Included Files
************************************************************************************/
****************************************************************************/
#include <nuttx/config.h>
@@ -49,17 +56,17 @@
#ifdef CONFIG_SAMA5_BOOT_CS0FLASH
/************************************************************************************
* Definitions
************************************************************************************/
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/************************************************************************************
/****************************************************************************
* Private Functions
************************************************************************************/
****************************************************************************/
/************************************************************************************
/****************************************************************************
* Public Functions
************************************************************************************/
****************************************************************************/
/****************************************************************************
* Name: board_norflash_config
configs/sama5d3x-ek/src/sam_sdram.c
+548
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configs/sama5d3x-ek/src/sama5d3x-ek.h
+31
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@@ -108,6 +108,37 @@
* Public Functions
************************************************************************************/
/************************************************************************************
* Name: board_sdram_config
*
* Description:
* Configures DDR2 (MT47H128M16RT 128MB/ MT47H64M16HR)
*
* MT47H64M16HR : 8 Meg x 16 x 8 banks
* Refresh count: 8K
* Row address: A[12:0] (8K)
* Column address A[9:0] (1K)
* Bank address BA[2:0] a(24,25) (8)
*
* This logic was taken from Atmel sample code for the SAMA5D3x-EK.
*
* Input Parameters:
* devtype - Either DDRAM_MT47H128M16RT or DDRAM_MT47H64M16HR
*
* Assumptions:
* The DDR memory regions is configured as strongly ordered memory. When we
* complete initialization of SDRAM and it is ready for use, we will make DRAM
* into normal memory.
*
************************************************************************************/
#if defined(CONFIG_SAMA5_DDRCS) && !defined(CONFIG_SAMA5_BOOT_SDRAM) && \
!defined(CONFIG_BOOT_RUNFROMSDRAM)
void board_sdram_config(uint8_t sdramtype);
#else
# define board_sdram_config(t)
#endif
/************************************************************************************
* Name: up_ledinit
************************************************************************************/