[U-Boot] [PATCH v3 1/3] mx28evk: Fix warning when CONFIG_ENV_IS_IN_SPI_FLASH is selected

[U-Boot] [PATCH v3 1/3] mx28evk: Fix warning when CONFIG_ENV_IS_IN_SPI_FLASH is selected

[Fabio Estevam]

From: Fabio Estevam <fabio.estevam@freescale.com>

When building a target with CONFIG_ENV_IS_IN_SPI_FLASH the following 
warning is seen:

include/configs/mx28evk.h:73:0: warning: "CONFIG_ENV_SIZE" redefined [enabled by default]

Protect the definition of CONFIG_ENV_SIZE to avoid the warning.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
---
Change since v2:
- Avoid build breakage for mx28evk and mx28evk_nand targets

 include/configs/mx28evk.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/configs/mx28evk.h b/include/configs/mx28evk.h
index 9b9124a..9daa0bf 100644
--- a/include/configs/mx28evk.h
+++ b/include/configs/mx28evk.h
@@ -48,7 +48,11 @@
 #define CONFIG_SYS_SDRAM_BASE		PHYS_SDRAM_1
 
 /* Environment */
+#ifndef CONFIG_ENV_IS_IN_SPI_FLASH
 #define CONFIG_ENV_SIZE			(16 * 1024)
+#else
+#define CONFIG_ENV_SIZE			(4 * 1024)
+#endif
 #define CONFIG_ENV_OVERWRITE
 
 /* Environment is in MMC */
@@ -70,7 +74,6 @@
 /* Environemnt is in SPI flash */
 #if defined(CONFIG_CMD_SF) && defined(CONFIG_ENV_IS_IN_SPI_FLASH)
 #define CONFIG_SYS_REDUNDAND_ENVIRONMENT
-#define CONFIG_ENV_SIZE			0x1000		/* 4KB */
 #define CONFIG_ENV_OFFSET		0x40000		/* 256K */
 #define CONFIG_ENV_OFFSET_REDUND	(CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE)
 #define CONFIG_ENV_SECT_SIZE		0x1000
-- 
1.8.3.2

[U-Boot] [PATCH v3 2/3] mx28evk: Add a target for SPI NOR boot

[Fabio Estevam]

From: Fabio Estevam <fabio.estevam@freescale.com>

Introduce 'mx28evk_spi' target which will store the environment variables
into SPI NOR, which is useful when booting from SPI NOR.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
---
Changes since v2:
- None

 boards.cfg | 1 +
 1 file changed, 1 insertion(+)

diff --git a/boards.cfg b/boards.cfg
index fd4324d..dbee7f6 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -214,6 +214,7 @@ Active  arm         arm926ejs      mxs         freescale       mx23evk
 Active  arm         arm926ejs      mxs         freescale       mx28evk             mx28evk                               mx28evk:ENV_IS_IN_MMC                                                                                                             Fabio Estevam <fabio.estevam@freescale.com>
 Active  arm         arm926ejs      mxs         freescale       mx28evk             mx28evk_auart_console                 mx28evk:MXS_AUART,MXS_AUART_BASE=MXS_UARTAPP3_BASE,ENV_IS_IN_MMC                                                                  Fabio Estevam <fabio.estevam@freescale.com>
 Active  arm         arm926ejs      mxs         freescale       mx28evk             mx28evk_nand                          mx28evk:ENV_IS_IN_NAND                                                                                                            Fabio Estevam <fabio.estevam@freescale.com>
+Active  arm         arm926ejs      mxs         freescale       mx28evk             mx28evk_spi                          mx28evk:ENV_IS_IN_SPI_FLASH                                                                                                            Fabio Estevam <fabio.estevam@freescale.com>
 Active  arm         arm926ejs      mxs         olimex          mx23_olinuxino      mx23_olinuxino                        -                                                                                                                                 Marek Vasut <marek.vasut@gmail.com>
 Active  arm         arm926ejs      mxs         ppcag           bg0900              bg0900                                -                                                                                                                                 Marek Vasut <marex@denx.de>
 Active  arm         arm926ejs      mxs         sandisk         sansa_fuze_plus     sansa_fuze_plus                       -                                                                                                                                 Marek Vasut <marek.vasut@gmail.com>
-- 
1.8.3.2

[U-Boot] [PATCH v3 3/3] mx28evk: Add documentation on how to boot from SPI NOR

[Fabio Estevam]

From: Fabio Estevam <fabio.estevam@freescale.com>

Explain the necessary steps in order to boot from SPI NOR.

Based on a earlier submission from M?rten Wikman.

Signed-off-by: M?rten Wikman <marten.wikman@novia.fi>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
---
Changes since v2:
- None

 board/freescale/mx28evk/README | 22 +++++++++++++++++++---
 doc/README.mxs                 | 26 ++++++++++++++++++++++++++
 2 files changed, 45 insertions(+), 3 deletions(-)

diff --git a/board/freescale/mx28evk/README b/board/freescale/mx28evk/README
index 0389a1d..958ebc6 100644
--- a/board/freescale/mx28evk/README
+++ b/board/freescale/mx28evk/README
@@ -23,11 +23,19 @@ To boot MX28EVK from an SD card, set the boot mode DIP switches as:
    * VDD 5V: To the left (off)
    * Hold Button: Down (off)
 
+To boot MX28EVK from SPI NOR flash, set the boot mode DIP switches as:
+
+   * Boot Mode Select: 0 0 1 0 (Boot from SSP2)
+   * JTAG PSWITCH RESET: To the right (reset disabled)
+   * Battery Source: Down
+   * Wall 5V: Up
+   * VDD 5V: To the left (off)
+   * Hold Button: Down (off)
 
 Environment Storage
 -------------------
 
-There are two targets for mx28evk:
+There are three targets for mx28evk:
 
 "make mx28evk_config"		- store environment variables into MMC
 
@@ -35,12 +43,20 @@ or
 
 "make mx28evk_nand_config"	- store environment variables into NAND flash
 
+or
+
+"make mx28evk_spi_config"       - store enviroment variables into SPI NOR flash
+
 Choose the target accordingly.
 
 Note: The mx28evk board does not come with a NAND flash populated from the
 factory. It comes with an empty slot (U23), which allows the insertion of a
 48-pin TSOP flash device.
 
-Follow the instructions from doc/README.mxs to generate a bootable SD card.
+mx28evk does not come with SPI NOR flash populated from the factory either.
+It is possible to solder a SOIC memory on U49 or use a DIP8 on J89.
+To get SPI communication to work R320, R321,R322 and C178 need to be populated.
+Look in the schematics for the proper component values.
 
-Insert the SD card in slot 0, power up the board and U-boot will boot.
+Follow the instructions from doc/README.mxs to generate a bootable SD card or
+to generate a binary to be flashed into SPI NOR.
diff --git a/doc/README.mxs b/doc/README.mxs
index 0235a5a..ed2e568 100644
--- a/doc/README.mxs
+++ b/doc/README.mxs
@@ -23,6 +23,7 @@ Contents
 2) Compiling U-Boot for a MXS based board
 3) Installation of U-Boot for a MXS based board to SD card
 4) Installation of U-Boot into NAND flash on a MX28 based board
+5) Installation of U-boot into SPI NOR flash on a MX28 based board
 
 1) Prerequisites
 ----------------
@@ -262,3 +263,28 @@ There are two possibilities when preparing an image writable to NAND flash.
 	   In case the user needs to boot a firmware image bigger than 1Mb, the
 	   user has to adjust the "update_nand_firmware_maxsz" variable for the
 	   update scripts to work properly.
+
+5) Installation of U-Boot into SPI NOR flash on a MX28 based board
+------------------------------------------------------------------
+
+The u-boot.sb file can be directly written to SPI NOR from U-boot prompt.
+
+Load u-boot.sb into RAM, this can be done in several ways and one way is to use
+tftp:
+       => tftp u-boot.sb 0x42000000
+
+Probe the SPI NOR flash:
+       => sf probe
+
+(SPI NOR should be succesfully detected in this step)
+
+Erase the blocks where U-boot binary will be written to:
+       => sf erase 0x0 0x80000
+
+Write u-boot.sb to SPI NOR:
+       => sf write 0x42000000 0 0x80000
+
+Power off the board and set the boot mode DIP switches to boot from the SPI NOR
+according to MX28 manual section 12.2.1 (Table 12-2)
+
+Last step is to power up the board and U-boot should start from SPI NOR.
-- 
1.8.3.2

[U-Boot] [PATCH v3 1/3] mx28evk: Fix warning when CONFIG_ENV_IS_IN_SPI_FLASH is selected

[Stefano Babic]

Hi Fabio,

On 10/06/2014 05:03, Fabio Estevam wrote:
> From: Fabio Estevam <fabio.estevam@freescale.com>
> 
> When building a target with CONFIG_ENV_IS_IN_SPI_FLASH the following 
> warning is seen:
> 
> include/configs/mx28evk.h:73:0: warning: "CONFIG_ENV_SIZE" redefined [enabled by default]
> 
> Protect the definition of CONFIG_ENV_SIZE to avoid the warning.
> 
> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
> ---

Put in my queue to be merged.

Regards,
Stefano


-- 
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DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
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[U-Boot] [PATCH v3 1/3] mx28evk: Fix warning when CONFIG_ENV_IS_IN_SPI_FLASH is selected

[Stefano Babic]

On 10/06/2014 05:03, Fabio Estevam wrote:
> From: Fabio Estevam <fabio.estevam@freescale.com>
> 
> When building a target with CONFIG_ENV_IS_IN_SPI_FLASH the following 
> warning is seen:
> 
> include/configs/mx28evk.h:73:0: warning: "CONFIG_ENV_SIZE" redefined [enabled by default]
> 
> Protect the definition of CONFIG_ENV_SIZE to avoid the warning.
> 
> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
> ---

Applied to u-boot-imx, thanks !

Best regards,
Stefano Babic


-- 
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================