X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=doc%2FREADME.android-fastboot;h=2c3ee7810a4fc8940e93e87e972f13fbac1a2423;hb=56d1dded62246c48f772ddbd7211156a8a612974;hp=167760968ff56e5ede39c7395cc4cffbc9f01d7e;hpb=2c3dc792b6df16970077c0d64085e29f1f85d4c8;p=u-boot diff --git a/doc/README.android-fastboot b/doc/README.android-fastboot index 167760968f..2c3ee7810a 100644 --- a/doc/README.android-fastboot +++ b/doc/README.android-fastboot @@ -6,9 +6,8 @@ Overview The protocol that is used over USB is described in README.android-fastboot-protocol in same directory. -The current implementation does not yet support the erase command or the -"oem format" command, and there is minimal support for the flash command; -it only supports eMMC devices. +The current implementation is a minimal support of the erase command,the +"oem format" command and flash command;it only supports eMMC devices. Client installation =================== @@ -34,22 +33,69 @@ Board specific The fastboot gadget relies on the USB download gadget, so the following options must be configured: -CONFIG_USBDOWNLOAD_GADGET -CONFIG_G_DNL_VENDOR_NUM -CONFIG_G_DNL_PRODUCT_NUM -CONFIG_G_DNL_MANUFACTURER +CONFIG_USB_GADGET_DOWNLOAD +CONFIG_USB_GADGET_VENDOR_NUM +CONFIG_USB_GADGET_PRODUCT_NUM +CONFIG_USB_GADGET_MANUFACTURER -NOTE: The CONFIG_G_DNL_VENDOR_NUM must be one of the numbers supported by +NOTE: The CONFIG_USB_GADGET_VENDOR_NUM must be one of the numbers supported by the fastboot client. The list of vendor IDs supported can be found in the fastboot client source code (fastboot.c) mentioned above. -The fastboot function is enabled by defining CONFIG_CMD_FASTBOOT and -CONFIG_ANDROID_BOOT_IMAGE. +The fastboot function is enabled by defining CONFIG_USB_FUNCTION_FASTBOOT, +CONFIG_CMD_FASTBOOT and CONFIG_ANDROID_BOOT_IMAGE. The fastboot protocol requires a large memory buffer for downloads. This buffer should be as large as possible for a platform. The location of the -buffer and size are set with CONFIG_USB_FASTBOOT_BUF_ADDR and -CONFIG_USB_FASTBOOT_BUF_SIZE. +buffer and size are set with CONFIG_FASTBOOT_BUF_ADDR and +CONFIG_FASTBOOT_BUF_SIZE. + +Fastboot partition aliases can also be defined for devices where GPT +limitations prevent user-friendly partition names such as "boot", "system" +and "cache". Or, where the actual partition name doesn't match a standard +partition name used commonly with fastboot. Current implentation checks +aliases when accessing partitions by name (flash_write and erase functions). +To define a partition alias add an environment variable similar to: +fastboot_partition_alias_= +Example: fastboot_partition_alias_boot=LNX + +Partition Names +=============== +The Fastboot implementation in U-boot allows to write images into disk +partitions (currently on eMMC). Target partitions are referred on the host +computer by their names. + +For GPT/EFI the respective partition name is used. + +For MBR the partitions are referred by generic names according to the +following schema: + + + +Example: hda3, sdb1, usbda1 + +The device type is as follows: + + * IDE, ATAPI and SATA disks: hd + * SCSI disks: sd + * USB media: usbd + * MMC and SD cards: mmcsd + * Disk on chip: docd + * other: xx + +The device index starts from 'a' and refers to the interface (e.g. USB +controller, SD/MMC controller) or disk index. The partition index starts +from 1 and describes the partition number on the particular device. + +Writing Partition Table +======================= +Fastboot also allows to write the partition table to the media. This can be +done by writing the respective partition table image to a special target +"gpt" or "mbr". These names can be customized by defining the following +configuration options: + +CONFIG_FASTBOOT_GPT_NAME +CONFIG_FASTBOOT_MBR_NAME In Action =========