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i.MX: Add documentation on how to use SPI NOR on MX28evk

PATCH New Mårten Wikman 3 participants 5 messages Aug 11, 2013 – Aug 14, 2013 Arm i.MX and Layerscape

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Mårten Wikman

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#0 lore raw

PATCH 1/1 i.MX: Add documentation on how to use SPI NOR on MX28evk

This adds necessary information on how to use U-boot on SPI NOR on MX28evk

Signed-off-by Marten Wikman <[email protected]>
---
 board/freescale/mx28evk/README | 26 ++++++++++++++++++++++----
 boards.cfg                     |  1 +
 doc/README.mxs                 | 25 +++++++++++++++++++++++++
 3 files changed, 48 insertions(+), 4 deletions(-)
board/freescale/mx28evk/README +0 -0
index 524f3fc..37e5d55 100644
@@ -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 enviroment variables into MMC

@@ -35,12 +43,22 @@ or

"make mx28evk_nand_config" - store enviroment 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. +48-pin TSOP flash device. SPI NOR flash is neither populated from the factory. +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 has to be populated. +Look in the schematics for component values.

+Follow the instructions from doc/README.mxs to generate a bootable SD card.
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 SPI NOR +memory.
+Make sure boot mode switches are correct, press POWER and U-boot will boot. +

boards.cfg +0 -0
index 944ed4c..b9ee7bd 100644
@@ -203,6 +203,7 @@ mx23evk                      arm         arm926ejs
  mx23evk             freesca
 m28evk                       arm         arm926ejs   m28evk
   denx           mxs		m28evk
 mx28evk                      arm         arm926ejs   mx28evk
   freescale      mxs		mx28evk:ENV_IS_IN_MMC
 mx28evk_nand                 arm         arm926ejs   mx28evk

freescale mxs mx28evk:ENV_IS_IN_NAND
+mx28evk_spi arm arm926ejs mx28evk
freescale mxs mx28evk:ENV_IS_IN_SPI_FLASH
sc_sps_1 arm arm926ejs sc_sps_1
schulercontrol mxs
nhk8815 arm arm926ejs nhk8815
st nomadik
nhk8815_onenand arm arm926ejs nhk8815
st nomadik nhk8815:BOOT_ONENAND

doc/README.mxs +1 -0
index 5d9e72f..8f03711 100644
@@ -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
 ----------------

@@ -234,3 +235,27 @@ 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 to SPI NOR flash on a MX28 based board
+---------------------------------------------------------------
+
+To boot a MX28 based board from SPI NOR, set the boot mode DIP switches according
+to MX28 manual section 12.2.1 (Table 12-2), SSP2
+
+The file u-boot.sb can be directly written to SPI NOR from U-boot prompt. +
+Load u-boot to RAM, this can be done in several ways and one way is to use tftp:
+ => tftp u-boot.sb 0x42000000
+
+Activate correct SPI NOR flash with:
+ => sf probe 2:0
+
+First the blocks where U-boot should be written to needs to be erased:
+ => sf erase 0x0 0x80000
+
+Write u-boot.sb to SPI NOR with:
+ => sf write 0x42000000 0 0x80000
+
+Last step is to power up board and U-boot should start.

Signature · 1 line
1.8.3.2
#1 lore raw

PATCH 1/1 i.MX: Add documentation on how to use SPI NOR on MX28evk

Quoted 3 lines · M?rten Wikman

This adds necessary information on how to use U-boot on SPI NOR on MX28evk

Signed-off-by Marten Wikman <[email protected]>

Marten,

The patch looks right and complete; I'd just split it in two patches:

- add the new target
- add documentation

author
#2 lore raw

PATCH 1/1 i.MX: Add documentation on how to use SPI NOR on MX28evk

2013/8/11 Otavio Salvador <[email protected]>:

Quoted 12 lines · M?rten Wikman
Quoted 3 lines

This adds necessary information on how to use U-boot on SPI NOR on MX28evk

Signed-off-by Marten Wikman <[email protected]>

Marten,

The patch looks right and complete; I'd just split it in two patches:

- add the new target
- add documentation

Quoted 6 lines

From your commit log it is not clear you're adding the new target.

--
Otavio Salvador O.S. Systems
http://www.ossystems.com.br http://projetos.ossystems.com.br
Mobile: +55 (53) 9981-7854 Mobile: +1 (347) 903-9750

Should I split it into two and send is as PATCH v2 to the mailing list?

#3 lore raw

PATCH 1/1 i.MX: Add documentation on how to use SPI NOR on MX28evk

Quoted 8 lines · M?rten Wikman

2013/8/11 Otavio Salvador <[email protected]>:

Quoted 7 lines · M?rten Wikman
Quoted 3 lines

This adds necessary information on how to use U-boot on SPI NOR on MX28evk

Signed-off-by Marten Wikman <[email protected]>

Marten,

Quoted 8 lines
Quoted 6 lines

The patch looks right and complete; I'd just split it in two patches:

- add the new target
- add documentation

From your commit log it is not clear you're adding the new target.

Should I split it into two and send is as PATCH v2 to the mailing list?

I think so.

Signature · 3 lines
Otavio Salvador                             O.S. Systems
http://www.ossystems.com.br        http://projetos.ossystems.com.br
Mobile: +55 (53) 9981-7854            Mobile: +1 (347) 903-9750
#4 lore raw

PATCH 1/1 i.MX: Add documentation on how to use SPI NOR on MX28evk

In reply to Mårten Wikman

Hi M?rten,

Quoted 13 lines · M?rten Wikman

2013/8/11 Otavio Salvador <[email protected]>:

Quoted 12 lines · M?rten Wikman
Quoted 3 lines

This adds necessary information on how to use U-boot on SPI NOR on MX28evk

Signed-off-by Marten Wikman <[email protected]>

Marten,

The patch looks right and complete; I'd just split it in two patches:

- add the new target
- add documentation

Quoted 8 lines
Quoted 6 lines

From your commit log it is not clear you're adding the new target.

--
Otavio Salvador O.S. Systems
http://www.ossystems.com.br http://projetos.ossystems.com.br
Mobile: +55 (53) 9981-7854 Mobile: +1 (347) 903-9750

Should I split it into two and send is as PATCH v2 to the mailing list?

This is necessary - the two items documentation and new target are orthogonal. Please do it in this way.

Best regards,
Stefano Babic

Signature · 5 lines
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