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  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, 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 static int avr_soft_reset_halt(struct target *target);
  46
  47 /* IR and DR functions */
  48 static int mcu_write_ir(struct jtag_tap *tap, uint8_t *ir_in, uint8_t *ir_out, int ir_len, int rti);
  49 static int mcu_write_dr(struct jtag_tap *tap, uint8_t *dr_in, uint8_t *dr_out, int dr_len, int rti);
  50 static int mcu_write_ir_u8(struct jtag_tap *tap, uint8_t *ir_in, uint8_t ir_out, int ir_len, int rti);
  51 static int mcu_write_dr_u32(struct jtag_tap *tap, uint32_t *ir_in, uint32_t ir_out, int dr_len, int rti);
  52
  53 struct target_type avr_target = {
  54         .name = "avr",
  55
  56         .poll = avr_poll,
  57         .arch_state = avr_arch_state,
  58
  59         .target_request_data = NULL,
  60
  61         .halt = avr_halt,
  62         .resume = avr_resume,
  63         .step = avr_step,
  64
  65         .assert_reset = avr_assert_reset,
  66         .deassert_reset = avr_deassert_reset,
  67         .soft_reset_halt = avr_soft_reset_halt,
  68 /*
  69         .get_gdb_reg_list = avr_get_gdb_reg_list,
  70
  71         .read_memory = avr_read_memory,
  72         .write_memory = avr_write_memory,
  73         .bulk_write_memory = avr_bulk_write_memory,
  74         .checksum_memory = avr_checksum_memory,
  75         .blank_check_memory = avr_blank_check_memory,
  76
  77         .run_algorithm = avr_run_algorithm,
  78
  79         .add_breakpoint = avr_add_breakpoint,
  80         .remove_breakpoint = avr_remove_breakpoint,
  81         .add_watchpoint = avr_add_watchpoint,
  82         .remove_watchpoint = avr_remove_watchpoint,
  83 */
  84         .target_create = avr_target_create,
  85         .init_target = avr_init_target,
  86 };
  87
  88 static int avr_target_create(struct target *target, Jim_Interp *interp)
  89 {
  90         struct avr_common *avr = calloc(1, sizeof(struct avr_common));
  91
  92         avr->jtag_info.tap = target->tap;
  93         target->arch_info = avr;
  94
  95         return ERROR_OK;
  96 }
  97
  98 static int avr_init_target(struct command_context *cmd_ctx, struct target *target)
  99 {
 100         LOG_DEBUG("%s", __func__);
 101         return ERROR_OK;
 102 }
 103
 104 static int avr_arch_state(struct target *target)
 105 {
 106         LOG_DEBUG("%s", __func__);
 107         return ERROR_OK;
 108 }
 109
 110 static int avr_poll(struct target *target)
 111 {
 112         if ((target->state == TARGET_RUNNING) || (target->state == TARGET_DEBUG_RUNNING))
 113                 target->state = TARGET_HALTED;
 114
 115         LOG_DEBUG("%s", __func__);
 116         return ERROR_OK;
 117 }
 118
 119 static int avr_halt(struct target *target)
 120 {
 121         LOG_DEBUG("%s", __func__);
 122         return ERROR_OK;
 123 }
 124
 125 static int avr_resume(struct target *target, int current, uint32_t address,
 126                 int handle_breakpoints, int debug_execution)
 127 {
 128         LOG_DEBUG("%s", __func__);
 129         return ERROR_OK;
 130 }
 131
 132 static int avr_step(struct target *target, int current, uint32_t address, int handle_breakpoints)
 133 {
 134         LOG_DEBUG("%s", __func__);
 135         return ERROR_OK;
 136 }
 137
 138 static int avr_assert_reset(struct target *target)
 139 {
 140         target->state = TARGET_RESET;
 141
 142         LOG_DEBUG("%s", __func__);
 143         return ERROR_OK;
 144 }
 145
 146 static int avr_deassert_reset(struct target *target)
 147 {
 148         target->state = TARGET_RUNNING;
 149
 150         LOG_DEBUG("%s", __func__);
 151         return ERROR_OK;
 152 }
 153
 154 static int avr_soft_reset_halt(struct target *target)
 155 {
 156         LOG_DEBUG("%s", __func__);
 157         return ERROR_OK;
 158 }
 159
 160 int avr_jtag_senddat(struct jtag_tap *tap, uint32_t* dr_in, uint32_t dr_out,
 161                 int len)
 162 {
 163         return mcu_write_dr_u32(tap, dr_in, dr_out, len, 1);
 164 }
 165
 166 int avr_jtag_sendinstr(struct jtag_tap *tap, uint8_t *ir_in, uint8_t ir_out)
 167 {
 168         return mcu_write_ir_u8(tap, ir_in, ir_out, AVR_JTAG_INS_LEN, 1);
 169 }
 170
 171 /* IR and DR functions */
 172 static int mcu_write_ir(struct jtag_tap *tap, uint8_t *ir_in, uint8_t *ir_out,
 173                 int ir_len, int rti)
 174 {
 175         if (NULL == tap) {
 176                 LOG_ERROR("invalid tap");
 177                 return ERROR_FAIL;
 178         }
 179         if (ir_len != tap->ir_length) {
 180                 LOG_ERROR("invalid ir_len");
 181                 return ERROR_FAIL;
 182         }
 183
 184         {
 185                 jtag_add_plain_ir_scan(tap->ir_length, ir_out, ir_in, TAP_IDLE);
 186         }
 187
 188         return ERROR_OK;
 189 }
 190
 191 static int mcu_write_dr(struct jtag_tap *tap, uint8_t *dr_in, uint8_t *dr_out,
 192                 int dr_len, int rti)
 193 {
 194         if (NULL == tap) {
 195                 LOG_ERROR("invalid tap");
 196                 return ERROR_FAIL;
 197         }
 198
 199         {
 200                 jtag_add_plain_dr_scan(dr_len, dr_out, dr_in, TAP_IDLE);
 201         }
 202
 203         return ERROR_OK;
 204 }
 205
 206 static int mcu_write_ir_u8(struct jtag_tap *tap, uint8_t *ir_in,
 207                 uint8_t ir_out, int ir_len, int rti)
 208 {
 209         if (ir_len > 8) {
 210                 LOG_ERROR("ir_len overflow, maxium is 8");
 211                 return ERROR_FAIL;
 212         }
 213
 214         mcu_write_ir(tap, ir_in, &ir_out, ir_len, rti);
 215
 216         return ERROR_OK;
 217 }
 218
 219 static int mcu_write_dr_u32(struct jtag_tap *tap, uint32_t *dr_in,
 220                 uint32_t dr_out, int dr_len, int rti)
 221 {
 222         if (dr_len > 32) {
 223                 LOG_ERROR("dr_len overflow, maxium is 32");
 224                 return ERROR_FAIL;
 225         }
 226
 227         mcu_write_dr(tap, (uint8_t *)dr_in, (uint8_t *)&dr_out, dr_len, rti);
 228
 229         return ERROR_OK;
 230 }
 231
 232 int mcu_execute_queue(void)
 233 {
 234         return jtag_execute_queue();
 235 }