src/target/avrt.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2
   3 /***************************************************************************
   4  *   Copyright (C) 2009 by Simon Qian                                      *
   5  *   SimonQian@SimonQian.com                                               *
   6  ***************************************************************************/
   7
   8 #ifdef HAVE_CONFIG_H
   9 #include "config.h"
  10 #endif
  11
  12 #include "avrt.h"
  13 #include "target.h"
  14 #include "target_type.h"
  15
  16 #define AVR_JTAG_INS_LEN        4
  17
  18 /* forward declarations */
  19 static int avr_target_create(struct target *target, Jim_Interp *interp);
  20 static int avr_init_target(struct command_context *cmd_ctx, struct target *target);
  21
  22 static int avr_arch_state(struct target *target);
  23 static int avr_poll(struct target *target);
  24 static int avr_halt(struct target *target);
  25 static int avr_resume(struct target *target, int current, target_addr_t address,
  26                 int handle_breakpoints, int debug_execution);
  27 static int avr_step(struct target *target, int current, target_addr_t address,
  28                 int handle_breakpoints);
  29
  30 static int avr_assert_reset(struct target *target);
  31 static int avr_deassert_reset(struct target *target);
  32
  33 /* IR and DR functions */
  34 static int mcu_write_ir(struct jtag_tap *tap, uint8_t *ir_in, uint8_t *ir_out, int ir_len, int rti);
  35 static int mcu_write_dr(struct jtag_tap *tap, uint8_t *dr_in, uint8_t *dr_out, int dr_len, int rti);
  36 static int mcu_write_ir_u8(struct jtag_tap *tap, uint8_t *ir_in, uint8_t ir_out, int ir_len, int rti);
  37 static int mcu_write_dr_u32(struct jtag_tap *tap, uint32_t *ir_in, uint32_t ir_out, int dr_len, int rti);
  38
  39 struct target_type avr_target = {
  40         .name = "avr",
  41
  42         .poll = avr_poll,
  43         .arch_state = avr_arch_state,
  44
  45         .halt = avr_halt,
  46         .resume = avr_resume,
  47         .step = avr_step,
  48
  49         .assert_reset = avr_assert_reset,
  50         .deassert_reset = avr_deassert_reset,
  51 /*
  52         .get_gdb_reg_list = avr_get_gdb_reg_list,
  53
  54         .read_memory = avr_read_memory,
  55         .write_memory = avr_write_memory,
  56         .bulk_write_memory = avr_bulk_write_memory,
  57         .checksum_memory = avr_checksum_memory,
  58         .blank_check_memory = avr_blank_check_memory,
  59
  60         .run_algorithm = avr_run_algorithm,
  61
  62         .add_breakpoint = avr_add_breakpoint,
  63         .remove_breakpoint = avr_remove_breakpoint,
  64         .add_watchpoint = avr_add_watchpoint,
  65         .remove_watchpoint = avr_remove_watchpoint,
  66 */
  67         .target_create = avr_target_create,
  68         .init_target = avr_init_target,
  69 };
  70
  71 static int avr_target_create(struct target *target, Jim_Interp *interp)
  72 {
  73         struct avr_common *avr = calloc(1, sizeof(struct avr_common));
  74
  75         avr->jtag_info.tap = target->tap;
  76         target->arch_info = avr;
  77
  78         return ERROR_OK;
  79 }
  80
  81 static int avr_init_target(struct command_context *cmd_ctx, struct target *target)
  82 {
  83         LOG_DEBUG("%s", __func__);
  84         return ERROR_OK;
  85 }
  86
  87 static int avr_arch_state(struct target *target)
  88 {
  89         LOG_DEBUG("%s", __func__);
  90         return ERROR_OK;
  91 }
  92
  93 static int avr_poll(struct target *target)
  94 {
  95         if ((target->state == TARGET_RUNNING) || (target->state == TARGET_DEBUG_RUNNING))
  96                 target->state = TARGET_HALTED;
  97
  98         LOG_DEBUG("%s", __func__);
  99         return ERROR_OK;
 100 }
 101
 102 static int avr_halt(struct target *target)
 103 {
 104         LOG_DEBUG("%s", __func__);
 105         return ERROR_OK;
 106 }
 107
 108 static int avr_resume(struct target *target, int current, target_addr_t address,
 109                 int handle_breakpoints, int debug_execution)
 110 {
 111         LOG_DEBUG("%s", __func__);
 112         return ERROR_OK;
 113 }
 114
 115 static int avr_step(struct target *target, int current, target_addr_t address, int handle_breakpoints)
 116 {
 117         LOG_DEBUG("%s", __func__);
 118         return ERROR_OK;
 119 }
 120
 121 static int avr_assert_reset(struct target *target)
 122 {
 123         target->state = TARGET_RESET;
 124
 125         LOG_DEBUG("%s", __func__);
 126         return ERROR_OK;
 127 }
 128
 129 static int avr_deassert_reset(struct target *target)
 130 {
 131         target->state = TARGET_RUNNING;
 132
 133         LOG_DEBUG("%s", __func__);
 134         return ERROR_OK;
 135 }
 136
 137 int avr_jtag_senddat(struct jtag_tap *tap, uint32_t *dr_in, uint32_t dr_out,
 138                 int len)
 139 {
 140         return mcu_write_dr_u32(tap, dr_in, dr_out, len, 1);
 141 }
 142
 143 int avr_jtag_sendinstr(struct jtag_tap *tap, uint8_t *ir_in, uint8_t ir_out)
 144 {
 145         return mcu_write_ir_u8(tap, ir_in, ir_out, AVR_JTAG_INS_LEN, 1);
 146 }
 147
 148 /* IR and DR functions */
 149 static int mcu_write_ir(struct jtag_tap *tap, uint8_t *ir_in, uint8_t *ir_out,
 150                 int ir_len, int rti)
 151 {
 152         if (!tap) {
 153                 LOG_ERROR("invalid tap");
 154                 return ERROR_FAIL;
 155         }
 156         if (ir_len != tap->ir_length) {
 157                 LOG_ERROR("invalid ir_len");
 158                 return ERROR_FAIL;
 159         }
 160
 161         {
 162                 jtag_add_plain_ir_scan(tap->ir_length, ir_out, ir_in, TAP_IDLE);
 163         }
 164
 165         return ERROR_OK;
 166 }
 167
 168 static int mcu_write_dr(struct jtag_tap *tap, uint8_t *dr_in, uint8_t *dr_out,
 169                 int dr_len, int rti)
 170 {
 171         if (!tap) {
 172                 LOG_ERROR("invalid tap");
 173                 return ERROR_FAIL;
 174         }
 175
 176         {
 177                 jtag_add_plain_dr_scan(dr_len, dr_out, dr_in, TAP_IDLE);
 178         }
 179
 180         return ERROR_OK;
 181 }
 182
 183 static int mcu_write_ir_u8(struct jtag_tap *tap, uint8_t *ir_in,
 184                 uint8_t ir_out, int ir_len, int rti)
 185 {
 186         if (ir_len > 8) {
 187                 LOG_ERROR("ir_len overflow, maximum is 8");
 188                 return ERROR_FAIL;
 189         }
 190
 191         mcu_write_ir(tap, ir_in, &ir_out, ir_len, rti);
 192
 193         return ERROR_OK;
 194 }
 195
 196 static int mcu_write_dr_u32(struct jtag_tap *tap, uint32_t *dr_in,
 197                 uint32_t dr_out, int dr_len, int rti)
 198 {
 199         if (dr_len > 32) {
 200                 LOG_ERROR("dr_len overflow, maximum is 32");
 201                 return ERROR_FAIL;
 202         }
 203
 204         mcu_write_dr(tap, (uint8_t *)dr_in, (uint8_t *)&dr_out, dr_len, rti);
 205
 206         return ERROR_OK;
 207 }
 208
 209 int mcu_execute_queue(void)
 210 {
 211         return jtag_execute_queue();
 212 }