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.. SPDX-License-Identifier: GPL-2.0+
.. (C) Copyright 2013 Xilinx, Inc.
ZYNQ
====
About this
----------
This document describes the information about Xilinx Zynq U-Boot -
like supported boards, ML status and TODO list.
Zynq boards
-----------
Xilinx Zynq-7000 All Programmable SoCs enable extensive system level
differentiation, integration, and flexibility through hardware, software,
and I/O programmability.
* zc702 (single qspi, gem0, mmc) [1]
* zc706 (dual parallel qspi, gem0, mmc) [2]
* zed (single qspi, gem0, mmc) [3]
* microzed (single qspi, gem0, mmc) [4]
* zc770
- zc770-xm010 (single qspi, gem0, mmc)
- zc770-xm011 (8 or 16 bit nand)
- zc770-xm012 (nor)
- zc770-xm013 (dual parallel qspi, gem1)
Building
--------
configure and build for zc702 board::
$ export DEVICE_TREE=zynq-zc702
$ make xilinx_zynq_virt_defconfig
$ make
Bootmode
--------
Zynq has a facility to read the bootmode from the slcr bootmode register
once user is setting through jumpers on the board - see page no:1546 on [5]
All possible bootmode values are defined in Table 6-2:Boot_Mode MIO Pins
on [5].
board_late_init() will read the bootmode values using slcr bootmode register
at runtime and assign the modeboot variable to specific bootmode string which
is intern used in autoboot.
SLCR bootmode register Bit[3:0] values
.. code-block:: c
#define ZYNQ_BM_NOR 0x02
#define ZYNQ_BM_SD 0x05
#define ZYNQ_BM_JTAG 0x0
"modeboot" variable can assign any of "norboot", "sdboot" or "jtagboot"
bootmode strings at runtime.
Mainline status
---------------
- Added basic board configurations support.
- Added zynq u-boot bsp code - arch/arm/cpu/armv7/zynq
- Added zynq boards named - zc70x, zed, microzed, zc770_xm010/xm011/xm012/xm013
- Added zynq drivers:
:serial: drivers/serial/serial_zynq.c
:net: drivers/net/zynq_gem.c
:mmc: drivers/mmc/zynq_sdhci.c
:spi: drivers/spi/zynq_spi.c
:qspi: drivers/spi/zynq_qspi.c
:i2c: drivers/i2c/zynq_i2c.c
:nand: drivers/mtd/nand/raw/zynq_nand.c
- Done proper cleanups on board configurations
- Added basic FDT support for zynq boards
- d-cache support for zynq_gem.c
TODO
----
Add FDT support on individual drivers
* [1] http://www.xilinx.com/products/boards-and-kits/EK-Z7-ZC702-G.htm
* [2] http://www.xilinx.com/products/boards-and-kits/EK-Z7-ZC706-G.htm
* [3] http://zedboard.org/product/zedboard
* [4] http://zedboard.org/product/microzed
* [5] http://www.xilinx.com/support/documentation/user_guides/ug585-Zynq-7000-TRM.pdf
.. Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
.. Sun Dec 15 14:52:41 IST 2013
|
