tcl/target/icepick.cfg

   1 #
   2 # Copyright (C)   2011        by Karl Kurbjun
   3 # Copyright (C)   2009        by David Brownell
   4 #
   5
   6 # Utilities for TI ICEpick-C/D used in most TI SoCs
   7 # Details about the ICEPick are available in the the TRM for each SoC
   8 # and http://processors.wiki.ti.com/index.php/ICEPICK
   9
  10 # create "constants"
  11 proc CONST { key } {
  12
  13         array set constant {
  14                 # define ICEPick instructions
  15                 IR_BYPASS   0x00
  16                 IR_ROUTER   0x02
  17                 IR_CONNECT  0x07
  18                 IF_BYPASS   0x3F
  19         }
  20         return $constant($key)
  21 }
  22
  23 # Instruction to connect to the icepick module
  24 proc icepick_c_connect {jrc} {
  25
  26         # Send CONNECT instruction in IR state
  27         irscan $jrc [CONST IR_CONNECT] -endstate IRPAUSE
  28
  29         # Send write and connect key
  30         drscan $jrc 8 0x89 -endstate DRPAUSE
  31 }
  32
  33 # Instruction to disconnect to the icepick module
  34 proc icepick_c_disconnect {jrc} {
  35
  36         # Send CONNECT instruction in IR state
  37         irscan $jrc [CONST IR_CONNECT] -endstate IRPAUSE
  38
  39         # Send write and connect key
  40         drscan $jrc 8 0x86 -endstate DRPAUSE
  41 }
  42
  43 #
  44 # icepick_c_router:
  45 #  this function is for sending router commands
  46 # arguments are:
  47 #  jrc:        TAP name for the ICEpick
  48 #  rw:         read/write (0 for read, 1 for write)
  49 #  block:      icepick or DAP
  50 #  register:   which register to read/write
  51 #  payload:    value to read/write
  52 # this function is for sending router commands
  53 #
  54 proc icepick_c_router {jrc rw block register payload} {
  55
  56         set new_dr_value \
  57                 [expr ( ($rw & 0x1) << 31)        | ( ($block & 0x7) << 28) | \
  58                         ( ($register & 0xF) << 24)  | ( $payload & 0xFFFFFF ) ]
  59
  60 #       echo "\tNew router value:\t0x[format %x $new_dr_value]"
  61
  62         # select router
  63         irscan $jrc [CONST IR_ROUTER] -endstate IRPAUSE
  64
  65         # ROUTER instructions are 32 bits wide
  66         set old_dr_value 0x[drscan $jrc 32 $new_dr_value -endstate DRPAUSE]
  67 #       echo "\tOld router value:\t0x[format %x $old_dr_value]"
  68 }
  69
  70 # Configure the icepick control register
  71 proc icepick_c_setup {jrc} {
  72
  73         # send a router write, block is 0, register is 1, value is 0x2100
  74         icepick_c_router $jrc 1 0x0 0x1 0x001000
  75 }
  76
  77 # jrc   == TAP name for the ICEpick
  78 # port  == a port number, 0..15
  79 proc icepick_c_tapenable {jrc port} {
  80
  81         # First CONNECT to the ICEPick
  82 #       echo "Connecting to ICEPick"
  83         icepick_c_connect $jrc
  84
  85 #       echo "Configuring the ICEpick"
  86         icepick_c_setup $jrc
  87
  88         # NOTE: it's important not to enter RUN/IDLE state until
  89         # done sending these instructions and data to the ICEpick.
  90         # And never to enter RESET, which will disable the TAPs.
  91
  92         # first enable power and clock for TAP
  93         icepick_c_router $jrc 1 0x2 $port 0x100048
  94
  95         # TRM states that the register should be read back here, skipped for now
  96
  97         # enable debug "default" mode
  98         icepick_c_router $jrc 1 0x2 $port 0x102048
  99
 100         # TRM states that debug enable and debug mode should be read back and
 101         # confirmed - skipped for now
 102
 103         # Finally select the tap
 104         icepick_c_router $jrc 1 0x2 $port 0x102148
 105
 106         # Enter the bypass state
 107         irscan $jrc [CONST IR_BYPASS] -endstate RUN/IDLE
 108         runtest 10
 109 }
 110
 111 # jrc   == TAP name for the ICEpick
 112 # coreid== core id number 0..15 (not same as port number!)
 113 proc icepick_d_set_core_control {jrc coreid value } {
 114         icepick_c_router $jrc 1 0x6 $coreid $value
 115 }
 116
 117 # jrc   == TAP name for the ICEpick
 118 # port  == a port number, 0..15
 119 # Follow the sequence described in
 120 # http://processors.wiki.ti.com/images/f/f6/Router_Scan_Sequence-ICEpick-D.pdf
 121 proc icepick_d_tapenable {jrc port coreid { value 0x2008 } } {
 122         # First CONNECT to the ICEPick
 123         icepick_c_connect $jrc
 124         icepick_c_setup $jrc
 125
 126         # Select the port
 127         icepick_c_router $jrc 1 0x2 $port 0x2108
 128
 129         # Set icepick core control for $coreid
 130         icepick_d_set_core_control $jrc $coreid $value
 131
 132         # Enter the bypass state
 133         irscan $jrc [CONST IF_BYPASS] -endstate RUN/IDLE
 134         runtest 10
 135 }
 136
 137 # This function uses the ICEPick to send a warm system reset
 138 proc icepick_c_wreset {jrc} {
 139
 140         # send a router write, block is 0, register is 1, value is 0x2100
 141         icepick_c_router $jrc 1 0x0 0x1 0x002101
 142 }
 143