tcl/board/olimex_sam7_la2.cfg

   1 # SPDX-License-Identifier: GPL-2.0-or-later
   2
   3 source [find target/at91sam7a2.cfg]
   4
   5 # delays needed to get stable reads of cpu state
   6 jtag_ntrst_delay 10
   7 adapter srst delay 200
   8
   9 # board uses pullup and connects only srst
  10 reset_config srst_open_drain
  11
  12 # srst is connected to NRESET of CPU and fully resets everything...
  13 reset_config srst_only srst_pulls_trst
  14
  15 adapter speed 1
  16 $_TARGETNAME configure -event reset-start {
  17         adapter speed 1
  18 }
  19
  20 $_TARGETNAME configure -event reset-init {
  21         # init script from http://www.mikrocontroller.net/topic/107462
  22         # AT91SAM7A2
  23         # AMC (advanced memory controller)
  24
  25         echo "setting up AMC"
  26         # AMC_CS0 - FLASH 1MB (0x40000000-0x400FFFFF) + DM9000E (0x40100000)
  27         mww 0xFFE00000 0x40003EBD
  28
  29         # AMC_CS1 - RAM low 2MB (0x40400000-0x405FFFFF)
  30         mww 0xFFE00004 0x404030A9
  31
  32         # AMC_CS2 - RAM high 2MB (0x40800000-0x405FFFFF)
  33         #mww 0xFFE00008 0x404030A9
  34         # changed to  0x40_8_
  35         mww 0xFFE00008 0x408030A9
  36
  37         # AMC_MCR
  38         mww 0xFFE00024 0x00000004
  39
  40         # AMC_RCR force remap
  41         mww 0xFFE00020 0x00000001
  42
  43         echo "set up AMC"
  44         sleep 100
  45
  46         # the following base addresses from the original script did not correspond to those from datasheet
  47         # changed bases from 0xFF000000 to 0xFFF00000
  48
  49         # disable watchdog, to prevent unwanted resets
  50         mww 0xFFFA0068 0x00000000
  51         echo "disabled watchdog"
  52
  53         sleep 50
  54
  55         # disable PLL
  56         mww 0xFFFEC004 0x18070004
  57
  58         # PLL = 10 ==> Coreclock = 6Mhz*10/2 = 30 Mhz
  59         mww 0xFFFEC010 0x762D800A
  60
  61         # enable PLL
  62         mww 0xFFFEC000 0x23050004
  63         echo "set up pll"
  64
  65         sleep 100
  66         adapter speed 5000
  67 }
  68
  69 $_TARGETNAME arm7_9 dcc_downloads enable
  70 $_TARGETNAME arm7_9 fast_memory_access enable
  71
  72 # remap:  ram at 0, flash at 0x40000000, like reset-init above does
  73 $_TARGETNAME configure -work-area-phys 0x00000000 -work-area-size 0x4000 -work-area-backup 1
  74 flash bank onboard.flash cfi 0x40000000 0x00100000 2 2 at91sam7a2.cpu
  75
  76 # boot: ram at 0x300000, flash at 0x0, useful if board is in funny configuration
  77 #$_TARGETNAME configure -work-area-phys 0x00300000 -work-area-size 0x4000 -work-area-backup 1
  78 #flash bank onboard1.flash cfi 0x00000000 0x00100000 2 2 at91sam7a2.cpu