tcl/board/csb732.cfg

   1 # SPDX-License-Identifier: GPL-2.0-or-later
   2
   3 # The Cogent CSB732 board has a single i.MX35 chip
   4 source [find target/imx35.cfg]
   5
   6 # Determined by trial and error
   7 reset_config trst_and_srst combined
   8 adapter srst delay 200
   9 jtag_ntrst_delay 200
  10
  11 $_TARGETNAME configure -event gdb-attach { reset init }
  12 $_TARGETNAME configure -event reset-init { csb732_init }
  13
  14 # Bare-bones initialization of core clocks and SDRAM
  15 proc csb732_init { } {
  16
  17         # Disable fast writing only for init
  18         memwrite burst disable
  19
  20         # All delay loops are omitted.
  21         # We assume the interpreter latency is enough.
  22
  23         # Allow access to all coprocessors
  24         arm mcr 15 0 15 1 0 0x2001
  25
  26         # Disable MMU, caches, write buffer
  27         arm mcr 15 0 1 0 0 0x78
  28
  29         # Grant manager access to all domains
  30         arm mcr 15 0 3 0 0 0xFFFFFFFF
  31
  32         # Set ARM clock to 532 MHz, AHB to 133 MHz
  33         mww 0x53F80004 0x1000
  34
  35         # Set core clock to 2 * 24 MHz * (11 + 1/12) = 532 MHz
  36         mww 0x53F8001C 0xB2C01
  37
  38         set ESDMISC 0xB8001010
  39         set ESDCFG0 0xB8001004
  40         set ESDCTL0 0xB8001000
  41
  42         # Enable DDR
  43         mww $ESDMISC 0x4
  44
  45         # Timing
  46         mww $ESDCFG0 0x007fff3f
  47
  48         # CS0
  49         mww $ESDCTL0 0x92120080
  50
  51         # Precharge all dummy write
  52         mww 0x80000400 0
  53
  54         # Enable CS) auto-refresh
  55         mww $ESDCTL0 0xA2120080
  56
  57         # Refresh twice (dummy writes)
  58         mww 0x80000000 0
  59         mww 0x80000000 0
  60
  61         # Enable CS0 load mode register
  62         mww $ESDCTL0 0xB2120080
  63
  64         # Dummy writes
  65         mwb 0x80000033 0x01
  66         mwb 0x81000000 0x01
  67
  68         mww $ESDCTL0 0x82226080
  69         mww 0x80000000 0
  70
  71         # Re-enable fast writing
  72         memwrite burst enable
  73 }