src/target/dsp563xx_once.c

   1 /***************************************************************************
   2  *   Copyright (C) 2009 by Mathias Kuester                                 *
   3  *   mkdorg@users.sourceforge.net                                          *
   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 <jim.h>
  26
  27 #include "target.h"
  28 #include "target_type.h"
  29 #include "register.h"
  30 #include "dsp563xx.h"
  31 #include "dsp563xx_once.h"
  32
  33 #define JTAG_STATUS_STATIC_MASK         0x03
  34 #define JTAG_STATUS_STATIC_VALUE        0x01
  35
  36 #define JTAG_STATUS_NORMAL              0x01
  37 #define JTAG_STATUS_STOPWAIT            0x05
  38 #define JTAG_STATUS_BUSY                0x09
  39 #define JTAG_STATUS_DEBUG               0x0d
  40
  41 #define JTAG_INSTR_EXTEST               0x00
  42 #define JTAG_INSTR_SAMPLE_PRELOAD       0x01
  43 #define JTAG_INSTR_IDCODE               0x02
  44 #define JTAG_INSTR_HIZ                  0x04
  45 #define JTAG_INSTR_CLAMP                0x05
  46 #define JTAG_INSTR_ENABLE_ONCE          0x06
  47 #define JTAG_INSTR_DEBUG_REQUEST        0x07
  48 #define JTAG_INSTR_BYPASS               0x0F
  49
  50 /** */
  51 static inline int dsp563xx_write_dr(struct jtag_tap *tap, uint8_t * dr_in, uint8_t * dr_out, int dr_len, int rti)
  52 {
  53         jtag_add_plain_dr_scan(dr_len, dr_out, dr_in, TAP_IDLE);
  54
  55         return ERROR_OK;
  56 }
  57
  58 /** */
  59 static inline int dsp563xx_write_dr_u8(struct jtag_tap *tap, uint8_t * dr_in, uint8_t dr_out, int dr_len, int rti)
  60 {
  61         return dsp563xx_write_dr(tap, dr_in, &dr_out, dr_len, rti);
  62 }
  63
  64 /** */
  65 static inline int dsp563xx_write_dr_u32(struct jtag_tap *tap, uint32_t * dr_in, uint32_t dr_out, int dr_len, int rti)
  66 {
  67         return dsp563xx_write_dr(tap, (uint8_t *) dr_in, (uint8_t *) &dr_out, dr_len, rti);
  68 }
  69
  70 /** single word instruction */
  71 static inline int dsp563xx_once_ir_exec(struct jtag_tap *tap, int flush, uint8_t instr, uint8_t rw, uint8_t go, uint8_t ex)
  72 {
  73         int err;
  74
  75         err = dsp563xx_write_dr_u8(tap, 0, instr | (ex << 5) | (go << 6) | (rw << 7), 8, 0);
  76         if (err != ERROR_OK)
  77                 return err;
  78         if (flush)
  79                 err = jtag_execute_queue();
  80         return err;
  81 }
  82
  83 /* IR and DR functions */
  84 static inline int dsp563xx_write_ir(struct jtag_tap *tap, uint8_t * ir_in, uint8_t * ir_out, int ir_len, int rti)
  85 {
  86         jtag_add_plain_ir_scan(tap->ir_length, ir_out, ir_in, TAP_IDLE);
  87
  88         return ERROR_OK;
  89 }
  90
  91 static inline int dsp563xx_write_ir_u8(struct jtag_tap *tap, uint8_t * ir_in, uint8_t ir_out, int ir_len, int rti)
  92 {
  93         return dsp563xx_write_ir(tap, ir_in, &ir_out, ir_len, rti);
  94 }
  95
  96 static inline int dsp563xx_jtag_sendinstr(struct jtag_tap *tap, uint8_t * ir_in, uint8_t ir_out)
  97 {
  98         return dsp563xx_write_ir_u8(tap, ir_in, ir_out, tap->ir_length, 1);
  99 }
 100
 101 /** */
 102 int dsp563xx_once_target_status(struct jtag_tap *tap)
 103 {
 104         int err;
 105         uint8_t jtag_status;
 106
 107         err = dsp563xx_jtag_sendinstr(tap, &jtag_status, JTAG_INSTR_ENABLE_ONCE);
 108         if (err != ERROR_OK)
 109                 return TARGET_UNKNOWN;
 110         err = jtag_execute_queue();
 111         if (err != ERROR_OK)
 112                 return TARGET_UNKNOWN;
 113
 114         /* verify correct static status pattern */
 115         if ((jtag_status & JTAG_STATUS_STATIC_MASK) != JTAG_STATUS_STATIC_VALUE)
 116                 return TARGET_UNKNOWN;
 117
 118         if (jtag_status != JTAG_STATUS_DEBUG)
 119                 return TARGET_RUNNING;
 120
 121         return TARGET_HALTED;
 122 }
 123
 124 /** */
 125 int dsp563xx_once_request_debug(struct jtag_tap *tap, int reset_state)
 126 {
 127         int err;
 128         uint8_t ir_in = 0, pattern = 0;
 129         uint32_t retry = 0;
 130
 131         /* in reset state we only get a ACK
 132          * from the interface */
 133         if (reset_state)
 134                 pattern = 1;
 135         else
 136                 pattern = JTAG_STATUS_DEBUG;
 137
 138         /* wait until we get the ack */
 139         while (ir_in != pattern) {
 140                 err = dsp563xx_jtag_sendinstr(tap, &ir_in, JTAG_INSTR_DEBUG_REQUEST);
 141                 if (err != ERROR_OK)
 142                         return err;
 143                 err = jtag_execute_queue();
 144                 if (err != ERROR_OK)
 145                         return err;
 146
 147                 LOG_DEBUG("debug request: %02X", ir_in);
 148
 149                 if (retry++ == 100)
 150                         return ERROR_TARGET_FAILURE;
 151         }
 152
 153         /* we cant enable the once in reset state */
 154         if (pattern == 1)
 155                 return ERROR_OK;
 156
 157         /* try to enable once */
 158         retry = 0;
 159         ir_in = 0;
 160         while (ir_in != pattern) {
 161                 err = dsp563xx_jtag_sendinstr(tap, &ir_in, JTAG_INSTR_ENABLE_ONCE);
 162                 if (err != ERROR_OK)
 163                         return err;
 164                 err = jtag_execute_queue();
 165                 if (err != ERROR_OK)
 166                         return err;
 167
 168                 LOG_DEBUG("enable once: %02X", ir_in);
 169
 170                 if (retry++ == 100) {
 171                         LOG_DEBUG("error");
 172                         return ERROR_TARGET_FAILURE;
 173                 }
 174         }
 175
 176         if (ir_in != JTAG_STATUS_DEBUG)
 177                 return ERROR_TARGET_FAILURE;
 178
 179         return ERROR_OK;
 180 }
 181
 182 /** once read registers */
 183 int dsp563xx_once_read_register(struct jtag_tap *tap, int flush, struct once_reg *regs, int len)
 184 {
 185         int i;
 186         int err = ERROR_OK;
 187
 188         for (i = 0; i < len; i++) {
 189                 err = dsp563xx_once_reg_read_ex(tap, flush, regs[i].addr, regs[i].len, &regs[i].reg);
 190                 if (err != ERROR_OK)
 191                         return err;
 192         }
 193
 194         if (flush)
 195                 err = jtag_execute_queue();
 196         return err;
 197 }
 198
 199 /** once read register with register len */
 200 int dsp563xx_once_reg_read_ex(struct jtag_tap *tap, int flush, uint8_t reg, uint8_t len, uint32_t * data)
 201 {
 202         int err;
 203
 204         err = dsp563xx_once_ir_exec(tap, 1, reg, 1, 0, 0);
 205         if (err != ERROR_OK)
 206                 return err;
 207         err = dsp563xx_write_dr_u32(tap, data, 0x00, len, 0);
 208         if (err != ERROR_OK)
 209                 return err;
 210         if (flush)
 211                 err = jtag_execute_queue();
 212         return err;
 213 }
 214
 215 /** once read register */
 216 int dsp563xx_once_reg_read(struct jtag_tap *tap, int flush, uint8_t reg, uint32_t * data)
 217 {
 218         int err;
 219
 220         err = dsp563xx_once_ir_exec(tap, flush, reg, 1, 0, 0);
 221         if (err != ERROR_OK)
 222                 return err;
 223         err = dsp563xx_write_dr_u32(tap, data, 0x00, 24, 0);
 224         if (err != ERROR_OK)
 225                 return err;
 226         if (flush)
 227                 err = jtag_execute_queue();
 228         return err;
 229 }
 230
 231 /** once write register */
 232 int dsp563xx_once_reg_write(struct jtag_tap *tap, int flush, uint8_t reg, uint32_t data)
 233 {
 234         int err;
 235
 236         err = dsp563xx_once_ir_exec(tap, flush, reg, 0, 0, 0);
 237         if (err != ERROR_OK)
 238                 return err;
 239         err = dsp563xx_write_dr_u32(tap, 0x00, data, 24, 0);
 240         if (err != ERROR_OK)
 241                 return err;
 242         if (flush)
 243                 err = jtag_execute_queue();
 244         return err;
 245 }
 246
 247 /** single word instruction */
 248 int dsp563xx_once_execute_sw_ir(struct jtag_tap *tap, int flush, uint32_t opcode)
 249 {
 250         int err;
 251
 252         err = dsp563xx_once_ir_exec(tap, flush, DSP563XX_ONCE_OPDBR, 0, 1, 0);
 253         if (err != ERROR_OK)
 254                 return err;
 255         err = dsp563xx_write_dr_u32(tap, 0, opcode, 24, 0);
 256         if (err != ERROR_OK)
 257                 return err;
 258         if (flush)
 259                 err = jtag_execute_queue();
 260         return err;
 261 }
 262
 263 /** double word instruction */
 264 int dsp563xx_once_execute_dw_ir(struct jtag_tap *tap, int flush, uint32_t opcode, uint32_t operand)
 265 {
 266         int err;
 267
 268         err = dsp563xx_once_ir_exec(tap, flush, DSP563XX_ONCE_OPDBR, 0, 0, 0);
 269         if (err != ERROR_OK)
 270                 return err;
 271         err = dsp563xx_write_dr_u32(tap, 0, opcode, 24, 0);
 272         if (err != ERROR_OK)
 273                 return err;
 274         if (flush) {
 275                 err = jtag_execute_queue();
 276                 if (err != ERROR_OK)
 277                         return err;
 278         }
 279
 280         err = dsp563xx_once_ir_exec(tap, flush, DSP563XX_ONCE_OPDBR, 0, 1, 0);
 281         if (err != ERROR_OK)
 282                 return err;
 283         err = dsp563xx_write_dr_u32(tap, 0, operand, 24, 0);
 284         if (err != ERROR_OK)
 285                 return err;
 286         if (flush) {
 287                 err = jtag_execute_queue();
 288                 if (err != ERROR_OK)
 289                         return err;
 290         }
 291
 292         return ERROR_OK;
 293 }