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2016-04-01kc1: Proper reboot mode and boot reason validationPaul Kocialkowski
With the previous implementation, rebooting without registering a recognized reboot mode would end up with U-Boot checking for a valid power-on reason, which might result in the device turning off (e.g. with no USB cable attached and no buttons pressed). Since this approach is not viable (breaks reboot in most cases), the validity of the reboot reason is checked (in turn, by checking that a warm reset happened, as there is no magic) to detect a reboot and the 'o' char is recognized to indicate that power-off is required. Still, that might be overridden by the detection of usual power-on reasons, on purpose. Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
2016-03-15kc1: Clear reboot mode garbage on cold resetPaul Kocialkowski
Reboot mode garbage is found on cold reset and might be seen as valid on the next warm reset, thus it has to be cleared on cold reset. Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
2016-03-15kc1: Power off when the power on reason is not a valid onePaul Kocialkowski
Some power on reasons are not desirable (e.g. too short press on the power button), battery plug. Thus, power off the device when one of those occurs. Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
2016-03-15kc1: Boot to bootloader (fastboot) on ID pin pull-upPaul Kocialkowski
USB ID pin pull-up indicates factory (fastboot) cable detection. Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
2016-03-15kc1: OMAP4 reboot mode supportPaul Kocialkowski
This adds support for the omap4 reboot mode mechanism and exports the reboot mode via an environment variable, that is used in the boot command to make it possible to boot from the recovery partition or fastboot. Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
2016-03-15kc1: MUSB USB controller and fastboot USB gadget supportPaul Kocialkowski
This adds support for the MUSB USB dual-role controller in peripheral mode, with configuration options for the fastboot USB gadget. At this point, flashing the internal eMMC is support. Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
2016-03-15Amazon Kindle Fire (first generation) codename kc1 supportPaul Kocialkowski
The Amazon Kindle Fire (first generation) codename kc1 is a tablet that was released by Amazon back in 2011. It is using an OMAP4430 SoC GP version, which allows running U-Boot and the U-Boot SPL from the ground up. Signed-off-by: Paul Kocialkowski <contact@paulk.fr>