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Diffstat (limited to 'doc/board/ti/am43xx_evm.rst')
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diff --git a/doc/board/ti/am43xx_evm.rst b/doc/board/ti/am43xx_evm.rst new file mode 100644 index 0000000000..543526cd28 --- /dev/null +++ b/doc/board/ti/am43xx_evm.rst @@ -0,0 +1,188 @@ +.. SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause +.. sectionauthor:: Neha Malcom Francis <n-francis@ti.com> + +AM43xx Generation +================= + +Secure Boot +----------- + +.. include:: am335x_evm.rst + :start-after: .. secure_boot_include_start_config_ti_secure_device + :end-before: .. secure_boot_include_end_config_ti_secure_device + +.. include:: am335x_evm.rst + :start-after: .. secure_boot_include_start_spl_boot + :end-before: .. secure_boot_include_end_spl_boot + +<IMAGE_FLAG> is a value that specifies the type of the image to +generate OR the action the image generation tool will take. Valid +values are: + +.. list-table:: + :widths: 25 25 + :header-rows: 0 + + * - SPI_X-LOADER + - Generates an image for SPI flash (byte swapped) + * - XIP_X-LOADER + - Generates a single stage u-boot for NOR/QSPI XiP + * - ISSW + - Generates an image for all other boot modes + +<INPUT_FILE> is the full path and filename of the public world boot +loaderbinary file (depending on the boot media, this is usually +either u-boot-spl.bin or u-boot.bin). + +<OUTPUT_FILE> is the full path and filename of the final secure +image. The output binary images should be used in place of the standard +non-secure binary images (see the platform-specific user's guides and +releases notes for how the non-secure images are typically used) + +.. list-table:: + :widths: 25 25 + :header-rows: 0 + + * - u-boot-spl_HS_SPI_X-LOADER + - byte swapped boot image for SPI flash + * - u-boot_HS_XIP_X-LOADER + - boot image for NOR or QSPI Xip flash + * - u-boot-spl_HS_ISSW + - boot image for all other boot media + + +<SPL_LOAD_ADDR> is the address at which SOC ROM should load the +<INPUT_FILE> + +.. include:: am335x_evm.rst + :start-after: .. secure_boot_include_start_primary_u_boot + :end-before: .. secure_boot_include_end_primary_u_boot + +.. qspi_boot_support_include_start + +QSPI U-Boot support +------------------- + +Host processor is connected to serial flash device via qpsi +interface. QSPI is a kind of spi module that allows single, +dual and quad read access to external spi devices. The module +has a memory mapped interface which provide direct interface +for accessing data form external spi devices. + +The one QSPI in the device is primarily intended for fast booting +from Quad SPI flash devices. + +Usecase +^^^^^^^ + +MLO/u-boot.img will be flashed from SD/MMC to the flash device +using serial flash erase and write commands. Then, switch settings +will be changed to qspi boot. Then, the ROM code will read MLO +from the predefined location in the flash, where it was flashed and +execute it after storing it in SDRAM. Then, the MLO will read +u-boot.img from flash and execute it from SDRAM. + +SPI mode +^^^^^^^^ + +SPI mode uses mtd spi framework for transfer and reception of data. +Can be used in: + + #. Normal mode: use single pin for transfers + #. Dual Mode: use two pins for transfers. + #. Quad mode: use four pin for transfer + +Memory mapped read mode +^^^^^^^^^^^^^^^^^^^^^^^ + +In this, SPI controller is configured using configuration port and then +controller is switched to memory mapped port for data read. + +Driver +^^^^^^ + +drivers/qspi/ti_qspi.c + - File which is responsible for configuring the + qspi controller and also for providing the low level api which + is responsible for transferring the datas from host controller + to flash device and vice versa. + +.. qspi_boot_support_include_end + +Testing +^^^^^^^ + +These are the testing details of qspi flash driver with Macronix M25L51235 +flash device. + +The test includes + - probing the flash device + - erasing the flash device + - Writing to flash + - Reading the contents of the flash. + +Test Log + +.. code-block:: bash + + Hit any key to stop autoboot: 0 + => sf probe 0 + SF: Detected MX25L51235F with page size 256 Bytes, erase size 64 KiB, total 64 MiB, mapped at 30000000 + => sf erase 0 0x80000 + SF: 524288 bytes @ 0x0 Erased: OK + => mw 81000000 0xdededede 0x40000 + => sf write 81000000 0 0x40000 + SF: 262144 bytes @ 0x0 Written: OK + => sf read 82000000 0 0x40000 + SF: 262144 bytes @ 0x0 Read: OK + => md 0x82000000 + 82000000: dededede dededede dededede dededede ................ + 82000010: dededede dededede dededede dededede ................ + 82000020: dededede dededede dededede dededede ................ + 82000030: dededede dededede dededede dededede ................ + 82000040: dededede dededede dededede dededede ................ + 82000050: dededede dededede dededede dededede ................ + 82000060: dededede dededede dededede dededede ................ + 82000070: dededede dededede dededede dededede ................ + 82000080: dededede dededede dededede dededede ................ + 82000090: dededede dededede dededede dededede ................ + 820000a0: dededede dededede dededede dededede ................ + 820000b0: dededede dededede dededede dededede ................ + 820000c0: dededede dededede dededede dededede ................ + 820000d0: dededede dededede dededede dededede ................ + 820000e0: dededede dededede dededede dededede ................ + 820000f0: dededede dededede dededede dededede ................ + => md 0x82010000 + 82010000: dededede dededede dededede dededede ................ + 82010010: dededede dededede dededede dededede ................ + 82010020: dededede dededede dededede dededede ................ + 82010030: dededede dededede dededede dededede ................ + 82010040: dededede dededede dededede dededede ................ + 82010050: dededede dededede dededede dededede ................ + 82010060: dededede dededede dededede dededede ................ + 82010070: dededede dededede dededede dededede ................ + 82010080: dededede dededede dededede dededede ................ + 82010090: dededede dededede dededede dededede ................ + 820100a0: dededede dededede dededede dededede ................ + 820100b0: dededede dededede dededede dededede ................ + 820100c0: dededede dededede dededede dededede ................ + 820100d0: dededede dededede dededede dededede ................ + 820100e0: dededede dededede dededede dededede ................ + 820100f0: dededede dededede dededede dededede ................ + => md 0x82030000 + 82030000: dededede dededede dededede dededede ................ + 82030010: dededede dededede dededede dededede ................ + 82030020: dededede dededede dededede dededede ................ + 82030030: dededede dededede dededede dededede ................ + 82030040: dededede dededede dededede dededede ................ + 82030050: dededede dededede dededede dededede ................ + 82030060: dededede dededede dededede dededede ................ + 82030070: dededede dededede dededede dededede ................ + 82030080: dededede dededede dededede dededede ................ + 82030090: dededede dededede dededede dededede ................ + 820300a0: dededede dededede dededede dededede ................ + 820300b0: dededede dededede dededede dededede ................ + 820300c0: dededede dededede dededede dededede ................ + 820300d0: dededede dededede dededede dededede ................ + 820300e0: dededede dededede dededede dededede ................ + 820300f0: dededede dededede dededede dededede ................ |