src/flash/ocl.c

   1 /***************************************************************************
   2  *   Copyright (C) 2007 by Pavel Chromy                                    *
   3  *   chromy@asix.cz                                                        *
   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 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "ocl.h"
  25 #include "flash.h"
  26 #include "embeddedice.h"
  27
  28
  29 struct ocl_priv
  30 {
  31         struct arm_jtag *jtag_info;
  32         unsigned int buflen;
  33         unsigned int bufalign;
  34 };
  35
  36 static int ocl_erase_check(struct flash_bank *bank)
  37 {
  38         return ERROR_OK;
  39 }
  40
  41 static int ocl_protect_check(struct flash_bank *bank)
  42 {
  43         return ERROR_OK;
  44 }
  45
  46 /* flash_bank ocl 0 0 0 0 <target#> */
  47 FLASH_BANK_COMMAND_HANDLER(ocl_flash_bank_command)
  48 {
  49         struct arm7_9_common *arm7_9;
  50         struct ocl_priv *ocl;
  51
  52         if (argc < 6)
  53         {
  54                 LOG_WARNING("incomplete flash_bank ocl configuration");
  55                 return ERROR_FLASH_BANK_INVALID;
  56         }
  57
  58         arm7_9 = target_to_arm7_9(bank->target);
  59         if (!is_arm7_9(arm7_9))
  60                 return ERROR_TARGET_INVALID;
  61
  62         ocl = bank->driver_priv = malloc(sizeof(struct ocl_priv));
  63         ocl->jtag_info = &arm7_9->jtag_info;
  64         ocl->buflen = 0;
  65         ocl->bufalign = 1;
  66
  67         return ERROR_OK;
  68 }
  69
  70 static int ocl_erase(struct flash_bank *bank, int first, int last)
  71 {
  72         struct ocl_priv *ocl = bank->driver_priv;
  73         int retval;
  74         uint32_t dcc_buffer[3];
  75
  76         /* check preconditions */
  77         if (bank->num_sectors == 0)
  78                 return ERROR_FLASH_BANK_NOT_PROBED;
  79
  80         if (bank->target->state != TARGET_RUNNING)
  81         {
  82                 LOG_ERROR("target has to be running to communicate with the loader");
  83                 return ERROR_TARGET_NOT_RUNNING;
  84         }
  85
  86         if ((first == 0) && (last == bank->num_sectors - 1))
  87         {
  88                 dcc_buffer[0] = OCL_ERASE_ALL;
  89                 if ((retval = embeddedice_send(ocl->jtag_info, dcc_buffer, 1) != ERROR_OK))
  90                         return retval;
  91         }
  92         else
  93         {
  94                 dcc_buffer[0] = OCL_ERASE_BLOCK;
  95                 dcc_buffer[1] = first;
  96                 dcc_buffer[2] = last;
  97                 if ((retval = embeddedice_send(ocl->jtag_info, dcc_buffer, 3) != ERROR_OK))
  98                         return retval;
  99         }
 100
 101         /* wait for response, fixed timeout of 1 s */
 102         if ((retval = embeddedice_handshake(ocl->jtag_info, EICE_COMM_CTRL_WBIT, 1000) != ERROR_OK))
 103         {
 104                 if (retval == ERROR_TARGET_TIMEOUT)
 105                         LOG_ERROR("loader not responding");
 106                 return retval;
 107         }
 108
 109         /* receive response */
 110         if ((retval = embeddedice_receive(ocl->jtag_info, dcc_buffer + 1, 1) != ERROR_OK))
 111                 return retval;
 112
 113         if (dcc_buffer[1] != OCL_CMD_DONE)
 114         {
 115                 if (dcc_buffer[0] == OCL_ERASE_ALL)
 116                         LOG_ERROR("loader response to OCL_ERASE_ALL 0x%08" PRIx32 "", dcc_buffer[1]);
 117                 else
 118                         LOG_ERROR("loader response to OCL_ERASE_BLOCK 0x%08" PRIx32 "", dcc_buffer[1]);
 119                 return ERROR_FLASH_OPERATION_FAILED;
 120         }
 121
 122         return ERROR_OK;
 123 }
 124
 125 static int ocl_protect(struct flash_bank *bank, int set, int first, int last)
 126 {
 127         return ERROR_OK;
 128 }
 129
 130 static int ocl_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset, uint32_t count)
 131 {
 132         struct ocl_priv *ocl = bank->driver_priv;
 133         int retval;
 134         uint32_t *dcc_buffer;
 135         uint32_t *dcc_bufptr;
 136         int byteofs;
 137         int runlen;
 138         uint32_t chksum;
 139
 140         int i;
 141
 142         /* check preconditions */
 143         if (ocl->buflen == 0 || ocl->bufalign == 0)
 144                 return ERROR_FLASH_BANK_NOT_PROBED;
 145
 146         if (bank->target->state != TARGET_RUNNING)
 147         {
 148                 LOG_ERROR("target has to be running to communicate with the loader");
 149                 return ERROR_TARGET_NOT_RUNNING;
 150         }
 151
 152         /* allocate buffer for max. ocl buffer + overhead */
 153         dcc_buffer = malloc(sizeof(uint32_t)*(ocl->buflen/4 + 3));
 154
 155         while (count)
 156         {
 157                 if (count + (offset % ocl->bufalign) > ocl->buflen)
 158                         runlen = ocl->buflen - (offset % ocl->bufalign);
 159                 else
 160                         runlen = count;
 161
 162                 dcc_buffer[0] = OCL_FLASH_BLOCK | runlen;
 163                 dcc_buffer[1] = offset;
 164                 dcc_bufptr = &dcc_buffer[2];
 165
 166                 *dcc_bufptr = 0xffffffff;
 167                 byteofs = (offset % ocl->bufalign) % 4;
 168                 chksum = OCL_CHKS_INIT;
 169
 170                 /* copy data to DCC buffer in proper byte order and properly aligned */
 171                 for (i = 0; i < runlen; i++)
 172                 {
 173                         switch (byteofs++)
 174                         {
 175                                 case 0:
 176                                         *dcc_bufptr &= *(buffer++) | 0xffffff00;
 177                                         break;
 178                                 case 1:
 179                                         *dcc_bufptr &= ((*(buffer++)) << 8) | 0xffff00ff;
 180                                         break;
 181                                 case 2:
 182                                         *dcc_bufptr &= ((*(buffer++)) << 16) | 0xff00ffff;
 183                                         break;
 184                                 case 3:
 185                                         *dcc_bufptr &= ((*(buffer++)) << 24) | 0x00ffffff;
 186                                         chksum ^= *(dcc_bufptr++);
 187                                         *dcc_bufptr = 0xffffffff;
 188                                         byteofs = 0;
 189                                         break;
 190                         }
 191                 }
 192
 193                 /* add the remaining word to checksum */
 194                 if (byteofs)
 195                         chksum ^= *(dcc_bufptr++);
 196
 197                 *(dcc_bufptr++) = chksum;
 198
 199                 /* send the data */
 200                 if ((retval = embeddedice_send(ocl->jtag_info, dcc_buffer, dcc_bufptr-dcc_buffer)) != ERROR_OK)
 201                 {
 202                         free(dcc_buffer);
 203                   return retval;
 204                 }
 205
 206                 /* wait for response, fixed timeout of 1 s */
 207                 if ((retval = embeddedice_handshake(ocl->jtag_info, EICE_COMM_CTRL_WBIT, 1000) != ERROR_OK))
 208                 {
 209                         if (retval == ERROR_TARGET_TIMEOUT)
 210                                 LOG_ERROR("loader not responding");
 211                         free(dcc_buffer);
 212                         return retval;
 213                 }
 214
 215                 /* receive response */
 216                 if ((retval = embeddedice_receive(ocl->jtag_info, dcc_buffer, 1) != ERROR_OK))
 217                 {
 218                         free(dcc_buffer);
 219                         return retval;
 220                 }
 221
 222                 if (dcc_buffer[0] != OCL_CMD_DONE)
 223                 {
 224                         LOG_ERROR("loader response to OCL_FLASH_BLOCK 0x%08" PRIx32 "", dcc_buffer[0]);
 225                         free(dcc_buffer);
 226                         return ERROR_FLASH_OPERATION_FAILED;
 227                 }
 228
 229                 count -= runlen;
 230                 offset += runlen;
 231         }
 232
 233         free(dcc_buffer);
 234         return ERROR_OK;
 235 }
 236
 237 static int ocl_probe(struct flash_bank *bank)
 238 {
 239         struct ocl_priv *ocl = bank->driver_priv;
 240         int retval;
 241         uint32_t dcc_buffer[1];
 242         int sectsize;
 243         int i;
 244
 245         /* purge pending data in DCC */
 246         embeddedice_receive(ocl->jtag_info, dcc_buffer, 1);
 247
 248         dcc_buffer[0] = OCL_PROBE;
 249         if ((retval = embeddedice_send(ocl->jtag_info, dcc_buffer, 1) != ERROR_OK))
 250                 return retval;
 251
 252         /* wait for response, fixed timeout of 1 s */
 253         if ((retval = embeddedice_handshake(ocl->jtag_info, EICE_COMM_CTRL_WBIT, 1000) != ERROR_OK))
 254         {
 255                 if (retval == ERROR_TARGET_TIMEOUT)
 256                         LOG_ERROR("loader not responding");
 257                 return retval;
 258         }
 259
 260         /* receive response */
 261         if ((retval = embeddedice_receive(ocl->jtag_info, dcc_buffer, 1) != ERROR_OK))
 262                 return retval;
 263
 264         if (dcc_buffer[0] != OCL_CMD_DONE)
 265         {
 266                 LOG_ERROR("loader response to OCL_PROBE 0x%08" PRIx32 "", dcc_buffer[0]);
 267                 return ERROR_FLASH_OPERATION_FAILED;
 268         }
 269
 270         /* receive and fill in parameters, detection of loader is important, receive it one by one */
 271         if ((retval = embeddedice_handshake(ocl->jtag_info, EICE_COMM_CTRL_WBIT, 0) != ERROR_OK)
 272                 || (retval = embeddedice_receive(ocl->jtag_info, dcc_buffer, 1) != ERROR_OK))
 273                 return retval;
 274         bank->base = dcc_buffer[0];
 275
 276         if ((retval = embeddedice_handshake(ocl->jtag_info, EICE_COMM_CTRL_WBIT, 0) != ERROR_OK)
 277                 || (retval = embeddedice_receive(ocl->jtag_info, dcc_buffer, 1) != ERROR_OK))
 278                 return retval;
 279         bank->size = dcc_buffer[0];
 280
 281         if ((retval = embeddedice_handshake(ocl->jtag_info, EICE_COMM_CTRL_WBIT, 0) != ERROR_OK)
 282                 || (retval = embeddedice_receive(ocl->jtag_info, dcc_buffer, 1) != ERROR_OK))
 283                 return retval;
 284         bank->num_sectors = dcc_buffer[0];
 285
 286         if ((retval = embeddedice_handshake(ocl->jtag_info, EICE_COMM_CTRL_WBIT, 0) != ERROR_OK)
 287                 || (retval = embeddedice_receive(ocl->jtag_info, dcc_buffer, 1) != ERROR_OK))
 288                 return retval;
 289         ocl->buflen = dcc_buffer[0] & 0xffff;
 290         ocl->bufalign = dcc_buffer[0] >> 16;
 291
 292         bank->sectors = realloc(bank->sectors, sizeof(struct flash_sector)*bank->num_sectors);
 293         if (bank->num_sectors == 0)
 294         {
 295                 LOG_ERROR("number of sectors shall be non zero value");
 296                 return ERROR_FLASH_BANK_INVALID;
 297         }
 298         if (bank->size % bank->num_sectors) {
 299                 LOG_ERROR("bank size not divisible by number of sectors");
 300                 return ERROR_FLASH_BANK_INVALID;
 301         }
 302         sectsize = bank->size / bank->num_sectors;
 303         for (i = 0; i < bank->num_sectors; i++)
 304         {
 305                 bank->sectors[i].offset = i * sectsize;
 306                 bank->sectors[i].size = sectsize;
 307                 bank->sectors[i].is_erased = -1;
 308                 bank->sectors[i].is_protected = -1;
 309         }
 310
 311         if (ocl->bufalign == 0)
 312                 ocl->bufalign = 1;
 313
 314         if (ocl->buflen == 0)
 315         {
 316                 LOG_ERROR("buflen shall be non zero value");
 317                 return ERROR_FLASH_BANK_INVALID;
 318         }
 319
 320         if ((ocl->bufalign > ocl->buflen) || (ocl->buflen % ocl->bufalign))
 321         {
 322                 LOG_ERROR("buflen is not multiple of bufalign");
 323                 return ERROR_FLASH_BANK_INVALID;
 324         }
 325
 326         if (ocl->buflen % 4)
 327         {
 328                 LOG_ERROR("buflen shall be divisible by 4");
 329                 return ERROR_FLASH_BANK_INVALID;
 330         }
 331
 332         return ERROR_OK;
 333 }
 334
 335 static int ocl_info(struct flash_bank *bank, char *buf, int buf_size)
 336 {
 337         return ERROR_OK;
 338 }
 339
 340 static int ocl_auto_probe(struct flash_bank *bank)
 341 {
 342         struct ocl_priv *ocl = bank->driver_priv;
 343
 344         if (ocl->buflen == 0 || ocl->bufalign == 0)
 345                 return ERROR_FLASH_BANK_NOT_PROBED;
 346
 347         return ERROR_OK;
 348 }
 349
 350 struct flash_driver ocl_flash = {
 351                 .name = "ocl",
 352                 .flash_bank_command = &ocl_flash_bank_command,
 353                 .erase = &ocl_erase,
 354                 .protect = &ocl_protect,
 355                 .write = &ocl_write,
 356                 .probe = &ocl_probe,
 357                 .erase_check = &ocl_erase_check,
 358                 .protect_check = &ocl_protect_check,
 359                 .info = &ocl_info,
 360                 .auto_probe = &ocl_auto_probe,
 361         };