diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/boards/imx/Garz-Fricke-Vincell.rst | 2 | ||||
| -rw-r--r-- | Documentation/boards/imx/amazon-kindle-mx50.rst | 58 |
2 files changed, 59 insertions, 1 deletions
diff --git a/Documentation/boards/imx/Garz-Fricke-Vincell.rst b/Documentation/boards/imx/Garz-Fricke-Vincell.rst index 2eb5f65c64..58ab0ab42f 100644 --- a/Documentation/boards/imx/Garz-Fricke-Vincell.rst +++ b/Documentation/boards/imx/Garz-Fricke-Vincell.rst @@ -7,7 +7,7 @@ This CPU card is based on a Freescale i.MX53 CPU. The card is shipped with: * 512MiB synchronous dynamic RAM * microSD slot -see http://www.garz-fricke.com/vincell-lt-core_de.html for more information +see http://www.garz-fricke.com/en/products/embedded-systems/single-board-computer/ia-0086r/ for more information Bootstrapping barebox diff --git a/Documentation/boards/imx/amazon-kindle-mx50.rst b/Documentation/boards/imx/amazon-kindle-mx50.rst new file mode 100644 index 0000000000..1e71cd26ba --- /dev/null +++ b/Documentation/boards/imx/amazon-kindle-mx50.rst @@ -0,0 +1,58 @@ +Amazon Kindle 4/5 Model No. D01100, D01200 and EY21 +=================================================== + +The Kindle Model No. D01100 (Kindle Wi-Fi), D01200 (Kindle Touch) +and EY21 (Paperwhite) are refered as the Kindle 4th and 5th generation. +Those e-book readers share a common set of hardware: + +* a Freescale i.MX50 SOC +* 2 or 4GiB eMMC +* a MC13892 PMIC + +The older readers D01100 and D01200 use 256MiB of LPDDR1, +while the newer EY21 uses 256MiB of LPDDR2. + +The devices boot up in internal boot mode from an eMMC boot partition and +are shipped with a vendor modified u-boot imximage based on u-boot v2009.08. + +To upload and run a new bootloader the older devices can be put into +USB-downloader mode by the SOC microcode when a specific key is pressed during +startup: +* the fiveway down button on the model D01100 +* the home button on model D01200 +A new USB device "NS Blank CODEX" should appear, barebox may be uploaded using +$ scripts/imx/imx-usb-loader barebox-kindle-d01100.img +$ scripts/imx/imx-usb-loader barebox-kindle-d01200.img +Hint: keep the select button pressed down to get the barebox USB console. + +Barebox may be used as drop-in replacement for the shipped bootloader, when +the imximg fits into 258048 bytes. When installing the barebox imximg on +the eMMC take care not to overwrite the vendor supplied serial numbers stored +on the eMMC. +e.g. for the D01100 just write the imx-header and the application section: +loady -t usbserial +memcpy -b -s barebox-kindle-d01100.img -d /dev/disk0.boot0.imx_header 1024 0 2048 +memcpy -b -s barebox-kindle-d01100.img -d /dev/disk0.boot0.self 4096 0 253952 + +Note: a USB serial ACM console will be launched by a barebox init script +when +* the cursor select key is pressed during startup of model D01100 +* the home button is pressed within a second after startup of model D01200. + If you press the home button during startup, you will enter USB boot mode. +* the EY21 has no keys to press, a USB console will be launched for 10s. + +This device is battery-powered and there is no way to switch the device off. +When the device is inactive, the kindle software will first reduce the +power consumption to a few milliamps of battery power, after some minutes +the power consumption is further reduced to about 550 microamps. Switching +on iomux pullups may significantly reduce your standby-time. + +Hints to reduce the build image size. +Note that a drop-in replacement barebox imximage must not exceed 258048 bytes +since the space behind it is in use. Hence, don't build in drivers and FS +that are not required, e.g.: + NET, DISK_AHCI, DISK_INTF_PLATFORM_IDE, DISK_ATA, VIDEO, PWM, LED, + USB_STORAGE, USB_ULPI, NAND, MTD_UBI, FS_UBIFS, MFD_MC34704, MFD_MC9SDZ60, + MFD_STMPE, EEPROM_AT25, EEPROM_AT24, KEYBOARD_GPIO, PARTITION_DISK_EFI +Also unselect support for other boards to get rid of their dependencies. +Further select IMAGE_COMPRESSION_XZKERN |