src/target/avrt.c

   1 /***************************************************************************
   2  *   Copyright (C) 2009 by Simon Qian                                      *
   3  *   SimonQian@SimonQian.com                                               *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
  19  ***************************************************************************/
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include "config.h"
  23 #endif
  24
  25 #include "avrt.h"
  26 #include "target.h"
  27 #include "target_type.h"
  28
  29 #define AVR_JTAG_INS_LEN        4
  30
  31 /* forward declarations */
  32 static int avr_target_create(struct target *target, Jim_Interp *interp);
  33 static int avr_init_target(struct command_context *cmd_ctx, struct target *target);
  34
  35 static int avr_arch_state(struct target *target);
  36 static int avr_poll(struct target *target);
  37 static int avr_halt(struct target *target);
  38 static int avr_resume(struct target *target, int current, uint32_t address,
  39                 int handle_breakpoints, int debug_execution);
  40 static int avr_step(struct target *target, int current, uint32_t address,
  41                 int handle_breakpoints);
  42
  43 static int avr_assert_reset(struct target *target);
  44 static int avr_deassert_reset(struct target *target);
  45
  46 /* IR and DR functions */
  47 static int mcu_write_ir(struct jtag_tap *tap, uint8_t *ir_in, uint8_t *ir_out, int ir_len, int rti);
  48 static int mcu_write_dr(struct jtag_tap *tap, uint8_t *dr_in, uint8_t *dr_out, int dr_len, int rti);
  49 static int mcu_write_ir_u8(struct jtag_tap *tap, uint8_t *ir_in, uint8_t ir_out, int ir_len, int rti);
  50 static int mcu_write_dr_u32(struct jtag_tap *tap, uint32_t *ir_in, uint32_t ir_out, int dr_len, int rti);
  51
  52 struct target_type avr_target = {
  53         .name = "avr",
  54
  55         .poll = avr_poll,
  56         .arch_state = avr_arch_state,
  57
  58         .halt = avr_halt,
  59         .resume = avr_resume,
  60         .step = avr_step,
  61
  62         .assert_reset = avr_assert_reset,
  63         .deassert_reset = avr_deassert_reset,
  64 /*
  65         .get_gdb_reg_list = avr_get_gdb_reg_list,
  66
  67         .read_memory = avr_read_memory,
  68         .write_memory = avr_write_memory,
  69         .bulk_write_memory = avr_bulk_write_memory,
  70         .checksum_memory = avr_checksum_memory,
  71         .blank_check_memory = avr_blank_check_memory,
  72
  73         .run_algorithm = avr_run_algorithm,
  74
  75         .add_breakpoint = avr_add_breakpoint,
  76         .remove_breakpoint = avr_remove_breakpoint,
  77         .add_watchpoint = avr_add_watchpoint,
  78         .remove_watchpoint = avr_remove_watchpoint,
  79 */
  80         .target_create = avr_target_create,
  81         .init_target = avr_init_target,
  82 };
  83
  84 static int avr_target_create(struct target *target, Jim_Interp *interp)
  85 {
  86         struct avr_common *avr = calloc(1, sizeof(struct avr_common));
  87
  88         avr->jtag_info.tap = target->tap;
  89         target->arch_info = avr;
  90
  91         return ERROR_OK;
  92 }
  93
  94 static int avr_init_target(struct command_context *cmd_ctx, struct target *target)
  95 {
  96         LOG_DEBUG("%s", __func__);
  97         return ERROR_OK;
  98 }
  99
 100 static int avr_arch_state(struct target *target)
 101 {
 102         LOG_DEBUG("%s", __func__);
 103         return ERROR_OK;
 104 }
 105
 106 static int avr_poll(struct target *target)
 107 {
 108         if ((target->state == TARGET_RUNNING) || (target->state == TARGET_DEBUG_RUNNING))
 109                 target->state = TARGET_HALTED;
 110
 111         LOG_DEBUG("%s", __func__);
 112         return ERROR_OK;
 113 }
 114
 115 static int avr_halt(struct target *target)
 116 {
 117         LOG_DEBUG("%s", __func__);
 118         return ERROR_OK;
 119 }
 120
 121 static int avr_resume(struct target *target, int current, uint32_t address,
 122                 int handle_breakpoints, int debug_execution)
 123 {
 124         LOG_DEBUG("%s", __func__);
 125         return ERROR_OK;
 126 }
 127
 128 static int avr_step(struct target *target, int current, uint32_t address, int handle_breakpoints)
 129 {
 130         LOG_DEBUG("%s", __func__);
 131         return ERROR_OK;
 132 }
 133
 134 static int avr_assert_reset(struct target *target)
 135 {
 136         target->state = TARGET_RESET;
 137
 138         LOG_DEBUG("%s", __func__);
 139         return ERROR_OK;
 140 }
 141
 142 static int avr_deassert_reset(struct target *target)
 143 {
 144         target->state = TARGET_RUNNING;
 145
 146         LOG_DEBUG("%s", __func__);
 147         return ERROR_OK;
 148 }
 149
 150 int avr_jtag_senddat(struct jtag_tap *tap, uint32_t* dr_in, uint32_t dr_out,
 151                 int len)
 152 {
 153         return mcu_write_dr_u32(tap, dr_in, dr_out, len, 1);
 154 }
 155
 156 int avr_jtag_sendinstr(struct jtag_tap *tap, uint8_t *ir_in, uint8_t ir_out)
 157 {
 158         return mcu_write_ir_u8(tap, ir_in, ir_out, AVR_JTAG_INS_LEN, 1);
 159 }
 160
 161 /* IR and DR functions */
 162 static int mcu_write_ir(struct jtag_tap *tap, uint8_t *ir_in, uint8_t *ir_out,
 163                 int ir_len, int rti)
 164 {
 165         if (NULL == tap) {
 166                 LOG_ERROR("invalid tap");
 167                 return ERROR_FAIL;
 168         }
 169         if (ir_len != tap->ir_length) {
 170                 LOG_ERROR("invalid ir_len");
 171                 return ERROR_FAIL;
 172         }
 173
 174         {
 175                 jtag_add_plain_ir_scan(tap->ir_length, ir_out, ir_in, TAP_IDLE);
 176         }
 177
 178         return ERROR_OK;
 179 }
 180
 181 static int mcu_write_dr(struct jtag_tap *tap, uint8_t *dr_in, uint8_t *dr_out,
 182                 int dr_len, int rti)
 183 {
 184         if (NULL == tap) {
 185                 LOG_ERROR("invalid tap");
 186                 return ERROR_FAIL;
 187         }
 188
 189         {
 190                 jtag_add_plain_dr_scan(dr_len, dr_out, dr_in, TAP_IDLE);
 191         }
 192
 193         return ERROR_OK;
 194 }
 195
 196 static int mcu_write_ir_u8(struct jtag_tap *tap, uint8_t *ir_in,
 197                 uint8_t ir_out, int ir_len, int rti)
 198 {
 199         if (ir_len > 8) {
 200                 LOG_ERROR("ir_len overflow, maxium is 8");
 201                 return ERROR_FAIL;
 202         }
 203
 204         mcu_write_ir(tap, ir_in, &ir_out, ir_len, rti);
 205
 206         return ERROR_OK;
 207 }
 208
 209 static int mcu_write_dr_u32(struct jtag_tap *tap, uint32_t *dr_in,
 210                 uint32_t dr_out, int dr_len, int rti)
 211 {
 212         if (dr_len > 32) {
 213                 LOG_ERROR("dr_len overflow, maxium is 32");
 214                 return ERROR_FAIL;
 215         }
 216
 217         mcu_write_dr(tap, (uint8_t *)dr_in, (uint8_t *)&dr_out, dr_len, rti);
 218
 219         return ERROR_OK;
 220 }
 221
 222 int mcu_execute_queue(void)
 223 {
 224         return jtag_execute_queue();
 225 }