On 09:52-20240112, Sjoerd Simons wrote:
Both AM62 SK and beagleplay support DFU boot in a similar way now; Document how to actually run DFU boot for both boards
Signed-off-by: Sjoerd Simons sjoerd@collabora.com
Changes in v4:
- New patch
doc/board/beagle/am62x_beagleplay.rst | 12 +++++++++ doc/board/ti/am62x_sk.rst | 37 +++++++++++++++++++++++++++ 2 files changed, 49 insertions(+)
diff --git a/doc/board/beagle/am62x_beagleplay.rst b/doc/board/beagle/am62x_beagleplay.rst index 7784e62b0b7..4c8b0845845 100644 --- a/doc/board/beagle/am62x_beagleplay.rst +++ b/doc/board/beagle/am62x_beagleplay.rst @@ -270,6 +270,18 @@ for details. To switch to SD card boot mode, hold the USR button while powering on with Type-C power supply, then release when power LED lights up.
+DFU based boot +--------------
+To boot the board over DFU, ensure there is no SD card inserted with a +bootloader. Hold the USR switch while plugging into the Type C to boot into DFU +mode. After power-on the build artifacts needs to be uploaded one by one with a +tool like dfu-util.
Don't we also need a wiped out emmc unfortunately?
+.. include:: ../ti/am62x_sk.rst
- :start-after: .. am62x_evm_rst_include_start_dfu_boot
- :end-before: .. am62x_evm_rst_include_end_dfu_boot
Debugging U-Boot
diff --git a/doc/board/ti/am62x_sk.rst b/doc/board/ti/am62x_sk.rst index b12dc85f06b..904a54cd5ff 100644 --- a/doc/board/ti/am62x_sk.rst +++ b/doc/board/ti/am62x_sk.rst @@ -105,6 +105,20 @@ Set the variables corresponding to this platform:
- 3.1 R5:
+.. include:: ../ti/k3.rst
- :start-after: .. k3_rst_include_start_build_steps_spl_r5
- :end-before: .. k3_rst_include_end_build_steps_spl_r5
+* 3.1.1 Alternatively build R5 for DFU boot:
+As the SPL size can get to big when building with support for booting both from +local storage *and* DFU an extra config fragment should be used to enable DFU +support (and disable storage support)
+.. prompt:: bash $
- export UBOOT_CFG_CORTEXR=${UBOOT_CFG_CORTEXR} am62x_r5_usbdfu.config
.. include:: ../ti/k3.rst :start-after: .. k3_rst_include_start_build_steps_spl_r5 :end-before: .. k3_rst_include_end_build_steps_spl_r5 @@ -251,6 +265,29 @@ https://www.ti.com/lit/pdf/spruiv7 under the `Boot Mode Pins` section.
For SW2 and SW1, the switch state in the "ON" position = 1.
+DFU based boot +--------------
+To boot the board over DFU, set the switches to DFU mode and connect to the +USB Type C DRD Port on the board. After power-on the build artifacts needs to be +uploaded one by one with a tool like dfu-util.
+.. am62x_evm_rst_include_start_dfu_boot
+The initial ROM will have a DFU alt named `bootloader` for the initial R5 spl +upload. The next stages as exposed by u-boot have target alts matching the name +of the artifacts, for these a USB reset has to be done after each upload.
+When using dfu-util the following commands can be used to boot to a u-boot shell:
+.. prompt:: bash $
- dfu-util -a bootloader -D tiboot3.bin
- dfu-util -R -a tispl -D tispl.bin
- dfu-util -R -a u-boot.img -D u-boot.img
+.. am62x_evm_rst_include_end_dfu_boot
Debugging U-Boot
-- 2.43.0