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[kvmfornfv.git] / qemu / roms / u-boot / doc / README.zynq

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+#
+# 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.
+
+* zc70x
+  - 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)
+
+3. Building
+
+ # Configure for zc70x board
+   $ make zynq_zc70x_config
+     Configuring for zynq_zc70x board...
+
+ # Building default dts for zc702 board
+   $ make
+
+ # Building specified dts for zc706 board
+   $ make DEVICE_TREE=zynq-zc706
+
+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 named - zc70x, zed, microzed, zc770_xm010, zc770_xm012, zc770_xm013
+- Added zynq drivers:
+  serial - drivers/serial/serial_zynq.c
+  net - drivers/net/zynq_gem.c
+  mmc - drivers/mmc/zynq_sdhci.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 basic FDT support for zynq boards
+- d-cache support for zynq_gem.c
+
+6. TODO
+
+- Add zynq boards support - zc770_xm011
+- Add zynq qspi controller driver
+- Add zynq nand controller driver
+- 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