at91: Choose environment variables location within make config target

This patch adds the possiblity to choose the media where the environment will
be located. This allow to choose this fundamental configuration without editing
config files.

Documentation file added.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Stelian Pop <stelian@popies.net>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

Makefile

@@ -2582,17 +2582,63 @@ afeb9260_config:	unconfig
 at91cap9adk_config	:	unconfig
 	@$(MKCONFIG) $(@:_config=) arm arm926ejs at91cap9adk atmel at91
 
+at91sam9260ek_nandflash_config \
+at91sam9260ek_dataflash_cs0_config \
+at91sam9260ek_dataflash_cs1_config \
 at91sam9260ek_config	:	unconfig
-	@$(MKCONFIG) $(@:_config=) arm arm926ejs at91sam9260ek atmel at91
+	@if [ "$(findstring _nandflash,$@)" ] ; then \
+		echo "#define CONFIG_SYS_USE_NANDFLASH 1"	>>$(obj)include/config.h ; \
+		$(XECHO) "... with environment variable in NAND FLASH" ; \
+	elif [ "$(findstring dataflash_cs0,$@)" ] ; then \
+		echo "#define CONFIG_SYS_USE_DATAFLASH_CS0 1"	>>$(obj)include/config.h ; \
+		$(XECHO) "... with environment variable in SPI DATAFLASH CS0" ; \
+	else \
+		echo "#define CONFIG_SYS_USE_DATAFLASH_CS1 1"	>>$(obj)include/config.h ; \
+		$(XECHO) "... with environment variable in SPI DATAFLASH CS1" ; \
+	fi;
+	@$(MKCONFIG) -a at91sam9260ek arm arm926ejs at91sam9260ek atmel at91
 
+at91sam9261ek_nandflash_config \
+at91sam9261ek_dataflash_cs0_config \
+at91sam9261ek_dataflash_cs3_config \
 at91sam9261ek_config	:	unconfig
-	@$(MKCONFIG) $(@:_config=) arm arm926ejs at91sam9261ek atmel at91
+	@if [ "$(findstring _nandflash,$@)" ] ; then \
+		echo "#define CONFIG_SYS_USE_NANDFLASH 1"	>>$(obj)include/config.h ; \
+		$(XECHO) "... with environment variable in NAND FLASH" ; \
+	elif [ "$(findstring dataflash_cs3,$@)" ] ; then \
+		echo "#define CONFIG_SYS_USE_DATAFLASH_CS3 1"	>>$(obj)include/config.h ; \
+		$(XECHO) "... with environment variable in SPI DATAFLASH CS3" ; \
+	else \
+		echo "#define CONFIG_SYS_USE_DATAFLASH_CS0 1"	>>$(obj)include/config.h ; \
+		$(XECHO) "... with environment variable in SPI DATAFLASH CS0" ; \
+	fi;
+	@$(MKCONFIG) -a at91sam9261ek arm arm926ejs at91sam9261ek atmel at91
 
+at91sam9263ek_nandflash_config \
+at91sam9263ek_dataflash_config \
+at91sam9263ek_dataflash_cs0_config \
 at91sam9263ek_config	:	unconfig
-	@$(MKCONFIG) $(@:_config=) arm arm926ejs at91sam9263ek atmel at91
+	@if [ "$(findstring _nandflash,$@)" ] ; then \
+		echo "#define CONFIG_SYS_USE_NANDFLASH 1"	>>$(obj)include/config.h ; \
+		$(XECHO) "... with environment variable in NAND FLASH" ; \
+	else \
+		echo "#define CONFIG_SYS_USE_DATAFLASH 1"	>>$(obj)include/config.h ; \
+		$(XECHO) "... with environment variable in SPI DATAFLASH CS0" ; \
+	fi;
+	@$(MKCONFIG) -a at91sam9263ek arm arm926ejs at91sam9263ek atmel at91
 
+at91sam9rlek_nandflash_config \
+at91sam9rlek_dataflash_config \
+at91sam9rlek_dataflash_cs0_config \
 at91sam9rlek_config	:	unconfig
-	@$(MKCONFIG) $(@:_config=) arm arm926ejs at91sam9rlek atmel at91
+	@if [ "$(findstring _nandflash,$@)" ] ; then \
+		echo "#define CONFIG_SYS_USE_NANDFLASH 1"	>>$(obj)include/config.h ; \
+		$(XECHO) "... with environment variable in NAND FLASH" ; \
+	else \
+		echo "#define CONFIG_SYS_USE_DATAFLASH 1"	>>$(obj)include/config.h ; \
+		$(XECHO) "... with environment variable in SPI DATAFLASH CS0" ; \
+	fi;
+	@$(MKCONFIG) -a at91sam9rlek arm arm926ejs at91sam9rlek atmel at91
 
 ########################################################################
 ## ARM Integrator boards - see doc/README-integrator for more info.

doc/README.at91

@@ -0,0 +1,88 @@
+Atmel AT91 Evaluation kits
+
+http://atmel.com/dyn/products/tools.asp?family_id=605#1443
+
+------------------------------------------------------------------------------
+AT91SAM9260EK
+------------------------------------------------------------------------------
+
+Memory map
+	0x20000000 - 23FFFFFF	SDRAM (64 MB)
+	0xC0000000 - Cxxxxxxx	Atmel Dataflash card (J13)
+	0xD0000000 - Dxxxxxxx	Soldered Atmel Dataflash
+
+Environment variables
+
+	U-Boot environment variables can be stored at different places:
+		- Dataflash on SPI chip select 1 (default)
+		- Dataflash on SPI chip select 0 (dataflash card)
+		- Nand flash.
+
+	You can choose your storage location at config step (here for at91sam9260ek) :
+		make at91sam9260ek_config		- use data flash (spi cs1) (default)
+		make at91sam9260ek_nandflash_config	- use nand flash
+		make at91sam9260ek_dataflash_cs0_config	- use data flash (spi cs0)
+		make at91sam9260ek_dataflash_cs1_config	- use data flash (spi cs1)
+
+
+------------------------------------------------------------------------------
+AT91SAM9261EK
+------------------------------------------------------------------------------
+
+Memory map
+	0x20000000 - 23FFFFFF	SDRAM (64 MB)
+	0xC0000000 - Cxxxxxxx	Soldered Atmel Dataflash
+	0xD0000000 - Dxxxxxxx	Atmel Dataflash card (J22)
+
+Environment variables
+
+	U-Boot environment variables can be stored at different places:
+		- Dataflash on SPI chip select 0 (default)
+		- Dataflash on SPI chip select 3 (dataflash card)
+		- Nand flash.
+
+	You can choose your storage location at config step (here for at91sam9260ek) :
+		make at91sam9261ek_config		- use data flash (spi cs0) (default)
+		make at91sam9261ek_nandflash_config	- use nand flash
+		make at91sam9261ek_dataflash_cs0_config	- use data flash (spi cs0)
+		make at91sam9261ek_dataflash_cs3_config	- use data flash (spi cs3)
+
+
+------------------------------------------------------------------------------
+AT91SAM9263EK
+------------------------------------------------------------------------------
+
+Memory map
+	0x20000000 - 23FFFFFF	SDRAM (64 MB)
+	0xC0000000 - Cxxxxxxx	Atmel Dataflash card (J9)
+
+Environment variables
+
+	U-Boot environment variables can be stored at different places:
+		- Dataflash on SPI chip select 0 (dataflash card)
+		- Nand flash.
+
+	You can choose your storage location at config step (here for at91sam9260ek) :
+		make at91sam9263ek_config		- use data flash (spi cs0) (default)
+		make at91sam9263ek_nandflash_config	- use nand flash
+		make at91sam9263ek_dataflash_cs0_config	- use data flash (spi cs0)
+
+
+------------------------------------------------------------------------------
+AT91SAM9RLEK
+------------------------------------------------------------------------------
+
+Memory map
+	0x20000000 - 23FFFFFF	SDRAM (64 MB)
+	0xC0000000 - Cxxxxxxx	Soldered Atmel Dataflash
+
+Environment variables
+
+	U-Boot environment variables can be stored at different places:
+		- Dataflash on SPI chip select 0
+		- Nand flash.
+
+	You can choose your storage location at config step (here for at91sam9260ek) :
+		make at91sam9263ek_config		- use data flash (spi cs0) (default)
+		make at91sam9263ek_nandflash_config	- use nand flash
+		make at91sam9263ek_dataflash_cs0_config	- use data flash (spi cs0)

include/configs/at91sam9260ek.h

@@ -131,10 +131,6 @@
 #define CONFIG_SYS_MEMTEST_START		PHYS_SDRAM
 #define CONFIG_SYS_MEMTEST_END			0x23e00000
 
-#undef CONFIG_SYS_USE_DATAFLASH_CS0
-#define CONFIG_SYS_USE_DATAFLASH_CS1		1
-#undef CONFIG_SYS_USE_NANDFLASH
-
 #ifdef CONFIG_SYS_USE_DATAFLASH_CS0
 
 /* bootstrap + u-boot + env + linux in dataflash on CS0 */

include/configs/at91sam9261ek.h

@@ -144,15 +144,12 @@
 #define CONFIG_SYS_MEMTEST_START		PHYS_SDRAM
 #define CONFIG_SYS_MEMTEST_END			0x23e00000
 
-#define CONFIG_SYS_USE_DATAFLASH_CS0		1
-#undef CONFIG_SYS_USE_NANDFLASH
-
 #ifdef CONFIG_SYS_USE_DATAFLASH_CS0
 
 /* bootstrap + u-boot + env + linux in dataflash on CS0 */
 #define CONFIG_ENV_IS_IN_DATAFLASH	1
 #define CONFIG_SYS_MONITOR_BASE	(CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS0 + 0x8400)
-#define CONFIG_ENV_OFFSET		0x4200
+#define CONFIG_ENV_OFFSET	0x4200
 #define CONFIG_ENV_ADDR		(CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS0 + CONFIG_ENV_OFFSET)
 #define CONFIG_ENV_SIZE		0x4200
 #define CONFIG_BOOTCOMMAND	"cp.b 0xC0042000 0x22000000 0x210000; bootm"
@@ -161,6 +158,20 @@
 				"mtdparts=at91_nand:-(root) "		\
 				"rw rootfstype=jffs2"
 
+#elif CONFIG_SYS_USE_DATAFLASH_CS3
+
+/* bootstrap + u-boot + env + linux in dataflash on CS3 */
+#define CONFIG_ENV_IS_IN_DATAFLASH	1
+#define CONFIG_SYS_MONITOR_BASE	(CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS3 + 0x8400)
+#define CONFIG_ENV_OFFSET	0x4200
+#define CONFIG_ENV_ADDR		(CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS3 + CONFIG_ENV_OFFSET)
+#define CONFIG_ENV_SIZE		0x4200
+#define CONFIG_BOOTCOMMAND	"cp.b 0xD0042000 0x22000000 0x210000; bootm"
+#define CONFIG_BOOTARGS		"console=ttyS0,115200 "			\
+				"root=/dev/mtdblock0 "			\
+				"mtdparts=at91_nand:-(root) "		\
+				"rw rootfstype=jffs2"
+
 #else /* CONFIG_SYS_USE_NANDFLASH */
 
 /* bootstrap + u-boot + env + linux in nandflash */

include/configs/at91sam9263ek.h

@@ -151,9 +151,6 @@
 #define CONFIG_SYS_MEMTEST_START		PHYS_SDRAM
 #define CONFIG_SYS_MEMTEST_END			0x23e00000
 
-#define CONFIG_SYS_USE_DATAFLASH		1
-#undef CONFIG_SYS_USE_NANDFLASH
-
 #ifdef CONFIG_SYS_USE_DATAFLASH
 
 /* bootstrap + u-boot + env + linux in dataflash on CS0 */

include/configs/at91sam9rlek.h

@@ -118,9 +118,6 @@
 #define CONFIG_SYS_MEMTEST_START		PHYS_SDRAM
 #define CONFIG_SYS_MEMTEST_END			0x23e00000
 
-#define CONFIG_SYS_USE_DATAFLASH		1
-#undef CONFIG_SYS_USE_NANDFLASH
-
 #ifdef CONFIG_SYS_USE_DATAFLASH
 
 /* bootstrap + u-boot + env + linux in dataflash on CS0 */