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  1. /***************************************************************************
  2. * Copyright (C) 2005 by Dominic Rath *
  3. * Dominic.Rath@gmx.de *
  4. * *
  5. * Copyright (C) 2007,2008 √ėyvind Harboe *
  6. * oyvind.harboe@zylin.com *
  7. * *
  8. * This program is free software; you can redistribute it and/or modify *
  9. * it under the terms of the GNU General Public License as published by *
  10. * the Free Software Foundation; either version 2 of the License, or *
  11. * (at your option) any later version. *
  12. * *
  13. * This program is distributed in the hope that it will be useful, *
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of *
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
  16. * GNU General Public License for more details. *
  17. * *
  18. * You should have received a copy of the GNU General Public License *
  19. * along with this program; if not, write to the *
  20. * Free Software Foundation, Inc., *
  21. * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
  22. ***************************************************************************/
  23. #ifdef HAVE_CONFIG_H
  24. #include "config.h"
  25. #endif
  26. #include "arm_jtag.h"
  27. #if 0
  28. #define _ARM_JTAG_SCAN_N_CHECK_
  29. #endif
  30. int arm_jtag_set_instr_inner(struct arm_jtag *jtag_info, uint32_t new_instr, void *no_verify_capture)
  31. {
  32. struct jtag_tap *tap;
  33. tap = jtag_info->tap;
  34. struct scan_field field;
  35. uint8_t t[4];
  36. field.tap = tap;
  37. field.num_bits = tap->ir_length;
  38. field.out_value = t;
  39. buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
  40. field.in_value = NULL;
  41. if (no_verify_capture == NULL)
  42. {
  43. jtag_add_ir_scan(1, &field, jtag_get_end_state());
  44. } else
  45. {
  46. /* FIX!!!! this is a kludge!!! arm926ejs.c should reimplement this arm_jtag_set_instr to
  47. * have special verification code.
  48. */
  49. jtag_add_ir_scan_noverify(1, &field, jtag_get_end_state());
  50. }
  51. return ERROR_OK;
  52. }
  53. int arm_jtag_scann_inner(struct arm_jtag *jtag_info, uint32_t new_scan_chain)
  54. {
  55. int retval = ERROR_OK;
  56. uint32_t values[1];
  57. int num_bits[1];
  58. values[0]=new_scan_chain;
  59. num_bits[0]=jtag_info->scann_size;
  60. if ((retval = arm_jtag_set_instr(jtag_info, jtag_info->scann_instr, NULL)) != ERROR_OK)
  61. {
  62. return retval;
  63. }
  64. jtag_add_dr_out(jtag_info->tap,
  65. 1,
  66. num_bits,
  67. values,
  68. jtag_get_end_state());
  69. jtag_info->cur_scan_chain = new_scan_chain;
  70. return retval;
  71. }
  72. int arm_jtag_reset_callback(enum jtag_event event, void *priv)
  73. {
  74. struct arm_jtag *jtag_info = priv;
  75. if (event == JTAG_TRST_ASSERTED)
  76. {
  77. jtag_info->cur_scan_chain = 0;
  78. }
  79. return ERROR_OK;
  80. }
  81. int arm_jtag_setup_connection(struct arm_jtag *jtag_info)
  82. {
  83. jtag_info->scann_instr = 0x2;
  84. jtag_info->cur_scan_chain = 0;
  85. jtag_info->intest_instr = 0xc;
  86. return jtag_register_event_callback(arm_jtag_reset_callback, jtag_info);
  87. }