forked from OERV-BSP/u-boot
c55cbaf133
The Galaxy R (GT-I9103) and Captivate Glide (SGH-i927) are both Tegra 2 based Samsung smartphones released in 2011. They both feature 1 GB of RAM and 8 GB of expandable flash memory. The key difference is that the Captivate Glide has an OLED panel (contrary to LCD in Galaxy R) and a QWERTY keyboard in form factor of a slider. Signed-off-by: Ion Agorria <ion@agorria.com> Reviewed-by: Svyatoslav Ryhel <clamor95@gmail.com> Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
52 lines
1.8 KiB
ReStructuredText
52 lines
1.8 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0+
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U-Boot for the Samsung N1 device family
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=======================================
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``DISCLAMER!`` Moving your Samsung Galaxy R (GT-I9103) or Samsung Captivate Glide
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(SGH-i927) to use U-Boot assumes replacement of the sboot. Vendor android firmwares
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will no longer be able to run on the device. This replacement IS reversible.
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Quick Start
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-----------
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- Build U-Boot
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- Boot
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Build U-Boot
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------------
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Device support is implemented by applying config fragment to a generic board
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defconfig. Generic board defconfig is suitable for Samsung Galaxy R (GT-I9103)
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while Samsung Captivate Glide (SGH-i927) support is provided by applying
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``bose.config`` fragment.
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.. code-block:: bash
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$ export CROSS_COMPILE=arm-none-eabi-
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$ make n1_defconfig bose.config # For Captivate Glide
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$ make
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After the build succeeds, you will obtain the final ``u-boot-dtb-tegra.bin``
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image, ready for further processing.
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Boot
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----
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Currently, U-Boot can be preloaded into RAM via the NvFlash. To enter
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RCM protocol use ``home`` and ``volume up`` for Galaxy R and ``volume down``
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and ``volume up`` Captivate Glide key combination plus plugging usb in.
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The host PC should recognize an APX device.
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Built U-Boot ``u-boot-dtb-tegra.bin`` can be loaded from fusee-tools
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directory with
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.. code-block:: bash
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$ ./utils/nvflash_t20 --setbct --bct ./bct/i927.bct --configfile ./utils/flash.cfg --bl u-boot-dtb-tegra.bin --sbk (in form of 0xABCDABCD 4 times) --sync # For Captivate Glide
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To boot Linux, U-Boot will look for an ``extlinux.conf`` on MicroSD and then on
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eMMC. Additionally, if the Volume Down button is pressed while loading, the
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device will enter bootmenu. Bootmenu contains entries to mount MicroSD and eMMC
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as mass storage, fastboot, reboot, reboot RCM and poweroff.
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