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