git.rot13.org Git - goodfet/blob - firmware/apps/jtag/ejtag.c

   1 /*! \file ejtag.c
   2   \author Travis Goodspeed <travis at radiantmachines.com>
   3   \brief MIPS EJTAG (32-bit)
   4 */
   5
   6 #include "platform.h"
   7 #include "command.h"
   8 #include "jtag.h"
   9 #include "ejtag.h"
  10
  11 //! Handles MIPS EJTAG commands.  Forwards others to JTAG.
  12 void ejtag_handle_fn( uint8_t const app,
  13                                           uint8_t const verb,
  14                                           uint32_t const len);
  15
  16 // define the ejtag app's app_t
  17 app_t const ejtag_app = {
  18
  19         /* app number */
  20         EJTAG,
  21
  22         /* handle fn */
  23         ejtag_handle_fn,
  24
  25         /* name */
  26         "EJTAG",
  27
  28         /* desc */
  29         "\tThe EJTAG app extends the basic JTAG app with support\n"
  30         "\tfor JTAG'ing MIPS based devices.\n"
  31 };
  32
  33 //! Handles MIPS EJTAG commands.  Forwards others to JTAG.
  34 void ejtag_handle_fn( uint8_t const app,
  35                                           uint8_t const verb,
  36                                           uint32_t const len)
  37 {
  38         switch(verb)
  39         {
  40         case START:
  41                 cmddata[0] = jtag_ir_shift_8(EJTAG_IR_BYPASS);
  42                 txdata(app, verb, 1);
  43                 break;
  44         case STOP:
  45                 txdata(app,verb,0);
  46                 break;
  47         case PEEK:
  48                 //WRITEME
  49         case POKE:
  50                 //WRITEME
  51         default:
  52                 (*(jtag_app.handle))(app, verb, len);
  53         }
  54 }