From: Jagannadha Sutradharudu Teki jagannadha.sutradharudu-teki@xilinx.com
Information on zynq u-boot about - mainline status - TODO
Signed-off-by: Jagannadha Sutradharudu Teki jaganna@xilinx.com Signed-off-by: Michal Simek michal.simek@xilinx.com
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Changes in v1: - Update to the latest status
doc/README.zynq | 76 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 doc/README.zynq
diff --git a/doc/README.zynq b/doc/README.zynq new file mode 100644 index 0000000..c046df4 --- /dev/null +++ b/doc/README.zynq @@ -0,0 +1,76 @@ +# +# Xilinx ZYNQ U-Boot +# +# (C) Copyright 2013 Xilinx, Inc. +# +# SPDX-License-Identifier: GPL-2.0+ +# + +1. About this + +This document describes the information about Xilinx Zynq U-Boot - +like supported boards, ML status and TODO list. + +2. Zynq boards + +Xilinx Zynq-7000 All Programmable SoCs enable extensive system level +differentiation, integration, and flexibility through hardware, software, +and I/O programmability. + +3. Building + + # Configure for microzed board + $ make zynq_config + Configuring for zynq board... + + # Building with zynq generic DTS file + $ make + + # Building with different DTS file placed in board/xilinx/dts/ + $ make DEVICE_TREE=zynq-XXX + +4. 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 +#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. + +5. Mainline status + +- Added basic board configurations support. +- Added zynq u-boot bsp code - arch/arm/cpu/armv7/zynq +- Added zynq boards names - zynq, zynq_dcc +- 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 + i2c - drivers/i2c/zynq_i2c.c +- Done proper cleanups on board configurations +- Added FDT support +- d-cache support for zynq_gem.c + +6. TODO + +- Add zynq qspi controller driver +- Add zynq nand controller driver + +[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.... -- 1.8.2.3