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diff --git a/i18n/fr_FR/docs/install/c201.md b/i18n/fr_FR/docs/install/c201.md new file mode 100644 index 00000000..94828cd8 --- /dev/null +++ b/i18n/fr_FR/docs/install/c201.md @@ -0,0 +1,220 @@ +--- +title: ASUS Chromebook C201 installation guide +x-toc-enable: true +... + +These instructions are for installing Libreboot to the ASUS Chromebook +C201 (more known under a name [*veyron speedy*](../misc/codenames.md)). +Since the device ships with Coreboot, the installation +instructions are the same before and after flashing Libreboot for the +first time. + +*If you are using libreboot\_src or git, then make sure that you built +the sources first (see [../git/\#build](../git/#build)).* + +Look at the [list of ROM images](#rom) to see which image is compatible +with your device. + +Libreboot can be installed internally from the device, with sufficient +privileges. The installation process requires using *Google's modified +version of flashrom*, that has support for reflashing the Chromebook's +SPI flash. Otherwise, flashing externally will work with the upstream +flashrom version. + +*Google's modified version of flashrom* is free software and its +source code is made available by Google: +[flashrom](https://chromium.googlesource.com/chromiumos/third_party/flashrom/).\ +It is not distributed along with Libreboot yet. However, it is +preinstalled on the device, with ChromeOS. + +Installing Libreboot internally requires sufficient privileges on the system +installed on the device. When the device has ChromeOS installed (as it does +initially), it is necessary to gain root privileges in ChromeOS, to be able to +access a root shell. + +Gaining root privileges on ChromeOS +-------------------------------- + +In order to gain root privileges on ChromeOS, developer mode has to be +enabled from the recovery mode screen and debugging features have to be +enabled in ChromeOS. + +Instructions to access the [recovery mode +screen](../depthcharge/#recovery_mode_screen) and [enabling developer +mode](../depthcharge/#enabling_developer_mode) are available on the page +dedicated to [depthcharge](../depthcharge/). + +Once developer mode is enabled, the device will boot to the [developer +mode screen](../depthcharge/#developer_mode_screen). ChromeOS can be +booted by waiting for 30 seconds (the delay is shortened in Libreboot) +or by pressing *Ctrl + D* + +After the system has booted, root access can be enabled by clicking on +the *Enable debugging features* link. A confirmation dialog will ask +whether to proceed.\ +After confirming by clicking *Proceed*, the device will reboot and ask +for the root password to set. Finally, the operation has to be confirmed +by clicking *Enable*. + +After setting the root password, it becomes possible to log-in as root. +A tty prompt can be obtained by pressing *Ctrl + Alt + Next*. The +*Next* key is the one on the top left of the keyboard. + +Preparing the device for the installation +Before installing Libreboot on the device, both its software and +hardware has to be prepared to allow the installation procedure and to +ensure that security features don't get in the way. + +Configuring verified boot parameters +------------------------------------ + +It is recommended to have access to the [developer mode +screen](../depthcharge/#developer_mode_screen) and to [configure the +following verified boot +parameters](../depthcharge/#configuring_verified_boot_parameters): + +- Kernels signature verification: *disabled* +- External media boot: *enabled* + +Those changes can be reverted later, when the device is known to be in a +working state. + +Removing the write protect screw +-------------------------------- + +Since part of the SPI flash is write-protected by a screw, it is +necessary to remove the screw to remove the write protection and allow +writing Libreboot to the *read-only* part of the flash. + +To access the screw, the device has to be opened. There are 8 screws to +remove from the bottom of the device, as shown on the picture below. Two +are hidden under the top pads. After removing the screws, the keyboard +plastic part can be carefully detached from the rest. *Beware: there +are cables attached to it!* It is advised to flip the keyboard plastic +part over, as shown on the picture below. The write protect screw is +located next to the SPI flash chip, circled in red in the picture below. +It has to be removed. + +[](images/c201/screws.jpg) [](images/c201/wp-screw.jpg) + +The write protect screw can be put back in place later, when the device +is known to be in a working state. + +Installing Libreboot to the SPI flash +===================================== + +The SPI flash (that holds Libreboot) is divided into various partitions +that are used to implement parts of the CrOS security system. Libreboot +is installed in the *read-only* coreboot partition, that becomes +writable after removing the write-protect screw. + +Installing Libreboot internally, from the device +------------------------------------------------ + +Before installing Libreboot to the SPI flash internally, the device has +to be reassembled. + +All the files from the `veyron_speedy` release (or build) have to be +transferred to the device. + +The following operations have to be executed with root privileges on the +device (e.g. using the `root` account). In addition, the +`cros-flash-replace` script has to be made executable: + + # chmod a+x cros-flash-replace + +The SPI flash has to be read first: + + # flashrom -p host -r flash.img + +*Note: it might be a good idea to copy the produced flash.img file at +this point and store it outside of the device for backup purposes.* + +Then, the `cros-flash-replace` script has to be executed as such: + + # sudo bash ./cros-flash-replace flash.img coreboot ro-frid + +If any error is shown, it is definitely a bad idea to go further than +this point. + +The resulting flash image can then be flashed back: + + # flashrom -p host -w flash.img + +You should also see within the output the following: + + Verifying flash... VERIFIED. + +Shut down. The device will now boot to Libreboot. + +Installing Libreboot externally, with a SPI flash programmer +------------------------------------------------------------ + +Before installing Libreboot to the SPI flash internally, the device has +to be opened. + +The SPI flash is located next to the write protect screw. Its layout is +indicated in the picture below. Note that it is not necessary to connect +`WP#` since after removing the screw it is pulled up weakly to 3v3. Before +writing to the chip externally, the battery has to be unplugged. +Battery connector is located under the heat spreader, that has to be +unscrewed from the rest of the case. It is located on +the right and has colorful cables, as shown on the picture below. + +[](images/c201/spi-flash-layout.jpg) +[](images/c201/battery-connector.jpg) + +All the files from the `veyron_speedy` release (or build) have to be +transferred to the host. + +The following operations have to be executed with root privileges on the +host (e.g. using the `root` account). In addition, the +`cros-flash-replace` script has to be made executable: + + # chmod a+x cros-flash-replace + +The SPI flash has to be read first (using the right spi programmer): + + # flashrom -p *programmer* -r flash.img + +*Note: it might be a good idea to copy the produced flash.img file at +this point and store it outside of the device for backup purposes.* + +Then, the `cros-flash-replace` script has to be executed as such: + + # ./cros-flash-replace flash.img coreboot ro-frid + +If any error is shown, it is definitely a bad idea to go further than +this point. + +The resulting flash image can then be flashed back (using the right spi +programmer): + + # flashrom -p *programmer* -w flash.img + +You should also see within the output the following: + + Verifying flash... VERIFIED. + +The device will now boot to Libreboot. + +Installing Debian +--------------------- +Debian is recommended for this device (which is on that list. + +See <https://wiki.debian.org/InstallingDebianOn/Asus/C201>. + +Also look at the HCL entry for operating systems (Debian, Devuan, Parabola): +<https://libreboot.org/docs/hardware/c201.md> + +Copyright © 2015 Paul Kocialkowski <contact@paulk.fr>\ +Copyright © 2017 Leah Rowe <info@minifree.org>\ + +Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License Version 1.3 or any later +version published by the Free Software Foundation +with no Invariant Sections, no Front Cover Texts, and no Back Cover Texts. +A copy of this license is found in [../fdl-1.3.md](../fdl-1.3.md) |