b3de92495f
Added support to find the bootmodes by reading slcr bootmode register. this can be helpful to autoboot the configurations w.r.t a specified bootmode. Added this functionality on board_late_init as it's not needed for normal initializtion part. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
82 lines
2.3 KiB
Plaintext
82 lines
2.3 KiB
Plaintext
#
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# Xilinx ZYNQ U-Boot
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#
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# (C) Copyright 2013 Xilinx, Inc.
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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1. About this
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This document describes the information about Xilinx Zynq U-Boot -
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like supported boards, ML status and TODO list.
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2. Zynq boards
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Xilinx Zynq-7000 All Programmable SoCs enable extensive system level
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differentiation, integration, and flexibility through hardware, software,
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and I/O programmability.
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* zc70x
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- zc702 (single qspi, gem0, mmc) [1]
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- zc706 (dual parallel qspi, gem0, mmc) [2]
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* zed (single qspi, gem0, mmc) [3]
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* microzed (single qspi, gem0, mmc) [4]
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* zc770
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- zc770-xm010 (single qspi, gem0, mmc)
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- zc770-xm011 (8 or 16 bit nand)
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- zc770-xm012 (nor)
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- zc770-xm013 (dual parallel qspi, gem1)
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3. Bootmode
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Zynq has a facility to read the bootmode from the slcr bootmode register
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once user is setting through jumpers on the board - see page no:1546 on [5]
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All possible bootmode values are defined in Table 6-2:Boot_Mode MIO Pins
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on [5].
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board_late_init() will read the bootmode values using slcr bootmode register
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at runtime and assign the modeboot variable to specific bootmode string which
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is intern used in autoboot.
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SLCR bootmode register Bit[3:0] values
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#define ZYNQ_BM_NOR 0x02
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#define ZYNQ_BM_SD 0x05
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#define ZYNQ_BM_JTAG 0x0
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"modeboot" variable can assign any of "norboot", "sdboot" or "jtagboot"
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bootmode strings at runtime.
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4. Mainline status
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- Added basic board configurations support.
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- Added zynq u-boot bsp code - arch/arm/cpu/armv7/zynq
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- Added zynq boards named - zynq, zynq_dcc
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- Added zynq drivers:
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serial - drivers/serial/serial_zynq.c
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net - drivers/net/zynq_gem.c
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mmc - drivers/mmc/zynq_sdhci.c
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mmc - drivers/mmc/zynq_sdhci.c
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spi- drivers/spi/zynq_spi.c
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i2c - drivers/i2c/zynq_i2c.c
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5. TODO
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- Add zynq boards support - zc70x, zed, microzed, zc770
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- Add zynq qspi controller driver
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- Add zynq nand controller driver
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- d-cache support for zynq_gem.c
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- FDT support for zynq boards
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- Need proper cleanups on board configurations
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[1] http://www.xilinx.com/products/boards-and-kits/EK-Z7-ZC702-G.htm
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[2] http://www.xilinx.com/products/boards-and-kits/EK-Z7-ZC706-G.htm
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[3] http://zedboard.org/product/zedboard
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[4] http://zedboard.org/product/microzed
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[5] http://www.xilinx.com/support/documentation/user_guides/ug585-Zynq-7000-TRM.pdf
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--
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Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
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Sun Dec 15 14:52:41 IST 2013
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