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- # SPDX-License-Identifier: GPL-2.0-or-later
- source [find target/at91sam7a2.cfg]
- # delays needed to get stable reads of cpu state
- jtag_ntrst_delay 10
- adapter srst delay 200
- # board uses pullup and connects only srst
- reset_config srst_open_drain
- # srst is connected to NRESET of CPU and fully resets everything...
- reset_config srst_only srst_pulls_trst
- adapter speed 1
- $_TARGETNAME configure -event reset-start {
- adapter speed 1
- }
- $_TARGETNAME configure -event reset-init {
- # init script from http://www.mikrocontroller.net/topic/107462
- # AT91SAM7A2
- # AMC (advanced memory controller)
- echo "setting up AMC"
- # AMC_CS0 - FLASH 1MB (0x40000000-0x400FFFFF) + DM9000E (0x40100000)
- mww 0xFFE00000 0x40003EBD
- # AMC_CS1 - RAM low 2MB (0x40400000-0x405FFFFF)
- mww 0xFFE00004 0x404030A9
- # AMC_CS2 - RAM high 2MB (0x40800000-0x405FFFFF)
- #mww 0xFFE00008 0x404030A9
- # changed to 0x40_8_
- mww 0xFFE00008 0x408030A9
- # AMC_MCR
- mww 0xFFE00024 0x00000004
- # AMC_RCR force remap
- mww 0xFFE00020 0x00000001
- echo "set up AMC"
- sleep 100
- # the following base addresses from the original script did not correspond to those from datasheet
- # changed bases from 0xFF000000 to 0xFFF00000
- # disable watchdog, to prevent unwanted resets
- mww 0xFFFA0068 0x00000000
- echo "disabled watchdog"
- sleep 50
- # disable PLL
- mww 0xFFFEC004 0x18070004
- # PLL = 10 ==> Coreclock = 6Mhz*10/2 = 30 Mhz
- mww 0xFFFEC010 0x762D800A
- # enable PLL
- mww 0xFFFEC000 0x23050004
- echo "set up pll"
- sleep 100
- adapter speed 5000
- }
- $_TARGETNAME arm7_9 dcc_downloads enable
- $_TARGETNAME arm7_9 fast_memory_access enable
- # remap: ram at 0, flash at 0x40000000, like reset-init above does
- $_TARGETNAME configure -work-area-phys 0x00000000 -work-area-size 0x4000 -work-area-backup 1
- flash bank onboard.flash cfi 0x40000000 0x00100000 2 2 at91sam7a2.cpu
- # boot: ram at 0x300000, flash at 0x0, useful if board is in funny configuration
- #$_TARGETNAME configure -work-area-phys 0x00300000 -work-area-size 0x4000 -work-area-backup 1
- #flash bank onboard1.flash cfi 0x00000000 0x00100000 2 2 at91sam7a2.cpu
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