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https://github.com/brain-hackers/u-boot-brain
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![Matt Sealey](/assets/img/avatar_default.png)
PCBID pads seem to need time to settle due to external pulldowns, otherwise we are reading floating GPIO pins with implicit pad pullups and get the wrong data. However we can't "wait" at the time we need them before relocation, since timers are not available. The time taken to get from DCD to the code requiring the pads set seems to be more than long enough (even with caches enabled). We have space in the DCD due to the DDR settings changes to configure all the pad settings we need for this, plus the LED pad settings too which reduces the amount of code required later on. Signed-off-by: Matt Sealey <matt@genesi-usa.com> Acked-by: Stefano Babic <sbabic@denx.de>
127 lines
3.7 KiB
INI
127 lines
3.7 KiB
INI
#
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# Copyright (C) 2009 Pegatron Corporation
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# Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
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# Copyright (C) 2009-2012 Genesi USA, Inc.
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#
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# BASED ON: imx51evk
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#
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# (C) Copyright 2009
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# Stefano Babic DENX Software Engineering sbabic@denx.de.
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#
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# See file CREDITS for list of people who contributed to this
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# project.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 2 of
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# the License or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not write to the Free Software
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# Foundation Inc. 51 Franklin Street Fifth Floor Boston,
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# MA 02110-1301 USA
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#
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# Refer docs/README.imxmage for more details about how-to configure
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# and create imximage boot image
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#
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# The syntax is taken as close as possible with the kwbimage
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# Boot Device : one of
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# spi, sd (the board has no nand neither onenand)
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BOOT_FROM spi
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# Device Configuration Data (DCD)
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#
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# Each entry must have the format:
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# Addr-type Address Value
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#
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# where:
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# Addr-type register length (1,2 or 4 bytes)
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# Address absolute address of the register
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# value value to be stored in the register
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# Essential GPIO settings to be done as early as possible
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# PCBIDn pad settings are all the defaults except #2 which needs HVE off
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DATA 4 0x73fa8134 0x3 # PCBID0 ALT3 GPIO 3_16
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DATA 4 0x73fa8130 0x3 # PCBID1 ALT3 GPIO 3_17
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DATA 4 0x73fa8128 0x3 # PCBID2 ALT3 GPIO 3_11
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DATA 4 0x73fa8504 0xe4 # PCBID2 PAD ~HVE
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DATA 4 0x73fa8198 0x3 # LED0 ALT3 GPIO 3_13
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DATA 4 0x73fa81c4 0x3 # LED1 ALT3 GPIO 3_14
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DATA 4 0x73fa81c8 0x3 # LED2 ALT3 GPIO 3_15
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# DDR bus IOMUX PAD settings
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DATA 4 0x73fa850c 0x20c5 # SDODT1
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DATA 4 0x73fa8510 0x20c5 # SDODT0
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DATA 4 0x73fa84ac 0xc5 # SDWE
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DATA 4 0x73fa84b0 0xc5 # SDCKE0
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DATA 4 0x73fa84b4 0xc5 # SDCKE1
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DATA 4 0x73fa84cc 0xc5 # DRAM_CS0
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DATA 4 0x73fa84d0 0xc5 # DRAM_CS1
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DATA 4 0x73fa882c 0x2 # DRAM_B4
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DATA 4 0x73fa88a4 0x2 # DRAM_B0
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DATA 4 0x73fa88ac 0x2 # DRAM_B1
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DATA 4 0x73fa88b8 0x2 # DRAM_B2
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DATA 4 0x73fa84d4 0xc5 # DRAM_DQM0
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DATA 4 0x73fa84d8 0xc5 # DRAM_DQM1
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DATA 4 0x73fa84dc 0xc5 # DRAM_DQM2
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DATA 4 0x73fa84e0 0xc5 # DRAM_DQM3
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# Setting DDR for micron
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# 13 Rows, 10 Cols, 32 bit, SREF=4 Micron Model
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# CAS=3 BL=4
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# ESDCTL_ESDCTL0
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DATA 4 0x83fd9000 0x82a20000
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# ESDCTL_ESDCTL1
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DATA 4 0x83fd9008 0x82a20000
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# ESDCTL_ESDMISC
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DATA 4 0x83fd9010 0xcaaaf6d0
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# ESDCTL_ESDCFG0
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DATA 4 0x83fd9004 0x3f3574aa
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# ESDCTL_ESDCFG1
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DATA 4 0x83fd900c 0x3f3574aa
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# Init DRAM on CS0
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# ESDCTL_ESDSCR
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DATA 4 0x83fd9014 0x04008008
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DATA 4 0x83fd9014 0x0000801a
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DATA 4 0x83fd9014 0x0000801b
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DATA 4 0x83fd9014 0x00448019
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DATA 4 0x83fd9014 0x07328018
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DATA 4 0x83fd9014 0x04008008
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DATA 4 0x83fd9014 0x00008010
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DATA 4 0x83fd9014 0x00008010
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DATA 4 0x83fd9014 0x06328018
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DATA 4 0x83fd9014 0x03808019
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DATA 4 0x83fd9014 0x00408019
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DATA 4 0x83fd9014 0x00008000
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# Init DRAM on CS1
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DATA 4 0x83fd9014 0x0400800c
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DATA 4 0x83fd9014 0x0000801e
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DATA 4 0x83fd9014 0x0000801f
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DATA 4 0x83fd9014 0x0000801d
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DATA 4 0x83fd9014 0x0732801c
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DATA 4 0x83fd9014 0x0400800c
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DATA 4 0x83fd9014 0x00008014
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DATA 4 0x83fd9014 0x00008014
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DATA 4 0x83fd9014 0x0632801c
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DATA 4 0x83fd9014 0x0380801d
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DATA 4 0x83fd9014 0x0040801d
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DATA 4 0x83fd9014 0x00008004
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# Write to CTL0
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DATA 4 0x83fd9000 0xb2a20000
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# Write to CTL1
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DATA 4 0x83fd9008 0xb2a20000
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# ESDMISC
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DATA 4 0x83fd9010 0x000ad6d0
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#ESDCTL_ESDCDLYGD
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DATA 4 0x83fd9034 0x90000000
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DATA 4 0x83fd9014 0x00000000
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