drivers/dataflash.c

   1 /* LowLevel function for ATMEL DataFlash support
   2  * Author : Hamid Ikdoumi (Atmel)
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation; either version 2 of
   7  * the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  17  * MA 02111-1307 USA
  18  *
  19  */
  20 #include <common.h>
  21 #include <config.h>
  22 #ifdef CONFIG_HAS_DATAFLASH
  23 #include <asm/hardware.h>
  24 #include <dataflash.h>
  25
  26 AT91S_DATAFLASH_INFO dataflash_info[CFG_MAX_DATAFLASH_BANKS];
  27 static AT91S_DataFlash DataFlashInst;
  28
  29 int cs[][CFG_MAX_DATAFLASH_BANKS] = {
  30         {CFG_DATAFLASH_LOGIC_ADDR_CS0, 0},      /* Logical adress, CS */
  31         {CFG_DATAFLASH_LOGIC_ADDR_CS3, 3}
  32 };
  33
  34 /*define the area offsets*/
  35 dataflash_protect_t area_list[NB_DATAFLASH_AREA] = {
  36         {0, 0x7fff, FLAG_PROTECT_SET},                  /* ROM code */
  37         {0x8000, 0x1ffff, FLAG_PROTECT_SET},            /* u-boot code */
  38         {0x20000, 0x27fff, FLAG_PROTECT_CLEAR},         /* u-boot environment */
  39         {0x28000, 0x1fffff, FLAG_PROTECT_CLEAR},        /* data area size to tune */
  40 };
  41
  42 extern void AT91F_SpiInit (void);
  43 extern int AT91F_DataflashProbe (int i, AT91PS_DataflashDesc pDesc);
  44 extern int AT91F_DataFlashRead (AT91PS_DataFlash pDataFlash,
  45                                 unsigned long addr,
  46                                 unsigned long size, char *buffer);
  47 extern int AT91F_DataFlashWrite( AT91PS_DataFlash pDataFlash,
  48                                     unsigned char *src,
  49                                     int dest,
  50                                     int size );
  51
  52 int AT91F_DataflashInit (void)
  53 {
  54         int i, j;
  55         int dfcode;
  56
  57         AT91F_SpiInit ();
  58
  59         for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++) {
  60                 dataflash_info[i].Desc.state = IDLE;
  61                 dataflash_info[i].id = 0;
  62                 dataflash_info[i].Device.pages_number = 0;
  63                 dfcode = AT91F_DataflashProbe (cs[i][1], &dataflash_info[i].Desc);
  64
  65                 switch (dfcode) {
  66                 case AT45DB161:
  67                         dataflash_info[i].Device.pages_number = 4096;
  68                         dataflash_info[i].Device.pages_size = 528;
  69                         dataflash_info[i].Device.page_offset = 10;
  70                         dataflash_info[i].Device.byte_mask = 0x300;
  71                         dataflash_info[i].Device.cs = cs[i][1];
  72                         dataflash_info[i].Desc.DataFlash_state = IDLE;
  73                         dataflash_info[i].logical_address = cs[i][0];
  74                         dataflash_info[i].id = dfcode;
  75                         break;
  76
  77                 case AT45DB321:
  78                         dataflash_info[i].Device.pages_number = 8192;
  79                         dataflash_info[i].Device.pages_size = 528;
  80                         dataflash_info[i].Device.page_offset = 10;
  81                         dataflash_info[i].Device.byte_mask = 0x300;
  82                         dataflash_info[i].Device.cs = cs[i][1];
  83                         dataflash_info[i].Desc.DataFlash_state = IDLE;
  84                         dataflash_info[i].logical_address = cs[i][0];
  85                         dataflash_info[i].id = dfcode;
  86                         break;
  87
  88                 case AT45DB642:
  89                         dataflash_info[i].Device.pages_number = 8192;
  90                         dataflash_info[i].Device.pages_size = 1056;
  91                         dataflash_info[i].Device.page_offset = 11;
  92                         dataflash_info[i].Device.byte_mask = 0x700;
  93                         dataflash_info[i].Device.cs = cs[i][1];
  94                         dataflash_info[i].Desc.DataFlash_state = IDLE;
  95                         dataflash_info[i].logical_address = cs[i][0];
  96                         dataflash_info[i].id = dfcode;
  97                         break;
  98                 case AT45DB128:
  99                         dataflash_info[i].Device.pages_number = 16384;
 100                         dataflash_info[i].Device.pages_size = 1056;
 101                         dataflash_info[i].Device.page_offset = 11;
 102                         dataflash_info[i].Device.byte_mask = 0x700;
 103                         dataflash_info[i].Device.cs = cs[i][1];
 104                         dataflash_info[i].Desc.DataFlash_state = IDLE;
 105                         dataflash_info[i].logical_address = cs[i][0];
 106                         dataflash_info[i].id = dfcode;
 107                         break;
 108
 109                 default:
 110                         break;
 111                 }
 112                 /* set the last area end to the dataflash size*/
 113                 area_list[NB_DATAFLASH_AREA -1].end =
 114                                 (dataflash_info[i].Device.pages_number *
 115                                 dataflash_info[i].Device.pages_size)-1;
 116
 117                 /* set the area addresses */
 118                 for(j = 0; j<NB_DATAFLASH_AREA; j++) {
 119                         dataflash_info[i].Device.area_list[j].start = area_list[j].start + dataflash_info[i].logical_address;
 120                         dataflash_info[i].Device.area_list[j].end = area_list[j].end + dataflash_info[i].logical_address;
 121                         dataflash_info[i].Device.area_list[j].protected = area_list[j].protected;
 122                 }
 123         }
 124         return (1);
 125 }
 126
 127
 128 void dataflash_print_info (void)
 129 {
 130         int i, j;
 131
 132         for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++) {
 133                 if (dataflash_info[i].id != 0) {
 134                         printf ("DataFlash:");
 135                         switch (dataflash_info[i].id) {
 136                         case AT45DB161:
 137                                 printf ("AT45DB161\n");
 138                                 break;
 139
 140                         case AT45DB321:
 141                                 printf ("AT45DB321\n");
 142                                 break;
 143
 144                         case AT45DB642:
 145                                 printf ("AT45DB642\n");
 146                                 break;
 147                         case AT45DB128:
 148                                 printf ("AT45DB128\n");
 149                                 break;
 150                         }
 151
 152                         printf ("Nb pages: %6d\n"
 153                                 "Page Size: %6d\n"
 154                                 "Size=%8d bytes\n"
 155                                 "Logical address: 0x%08X\n",
 156                                 (unsigned int) dataflash_info[i].Device.pages_number,
 157                                 (unsigned int) dataflash_info[i].Device.pages_size,
 158                                 (unsigned int) dataflash_info[i].Device.pages_number *
 159                                 dataflash_info[i].Device.pages_size,
 160                                 (unsigned int) dataflash_info[i].logical_address);
 161                         for (j=0; j< NB_DATAFLASH_AREA; j++) {
 162                                 printf ("Area %i:\t%08lX to %08lX %s\n", j,
 163                                         dataflash_info[i].Device.area_list[j].start,
 164                                         dataflash_info[i].Device.area_list[j].end,
 165                                         (dataflash_info[i].Device.area_list[j].protected ==
 166                                         FLAG_PROTECT_SET) ? "(RO)" : "");
 167                         }
 168                 }
 169         }
 170 }
 171
 172
 173 /*------------------------------------------------------------------------------*/
 174 /* Function Name       : AT91F_DataflashSelect                                  */
 175 /* Object              : Select the correct device                              */
 176 /*------------------------------------------------------------------------------*/
 177 AT91PS_DataFlash AT91F_DataflashSelect (AT91PS_DataFlash pFlash,
 178                                                                                 unsigned int *addr)
 179 {
 180         char addr_valid = 0;
 181         int i;
 182
 183         for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++)
 184                 if ((*addr & 0xFF000000) == dataflash_info[i].logical_address) {
 185                         addr_valid = 1;
 186                         break;
 187                 }
 188         if (!addr_valid) {
 189                 pFlash = (AT91PS_DataFlash) 0;
 190                 return pFlash;
 191         }
 192         pFlash->pDataFlashDesc = &(dataflash_info[i].Desc);
 193         pFlash->pDevice = &(dataflash_info[i].Device);
 194         *addr -= dataflash_info[i].logical_address;
 195         return (pFlash);
 196 }
 197
 198 /*------------------------------------------------------------------------------*/
 199 /* Function Name       : addr_dataflash                                         */
 200 /* Object              : Test if address is valid                               */
 201 /*------------------------------------------------------------------------------*/
 202 int addr_dataflash (unsigned long addr)
 203 {
 204         int addr_valid = 0;
 205         int i;
 206
 207         for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++) {
 208                 if ((((int) addr) & 0xFF000000) ==
 209                         dataflash_info[i].logical_address) {
 210                         addr_valid = 1;
 211                         break;
 212                 }
 213         }
 214
 215         return addr_valid;
 216 }
 217 /*-----------------------------------------------------------------------------*/
 218 /* Function Name       : size_dataflash                                         */
 219 /* Object              : Test if address is valid regarding the size            */
 220 /*-----------------------------------------------------------------------------*/
 221 int size_dataflash (AT91PS_DataFlash pdataFlash, unsigned long addr, unsigned long size)
 222 {
 223         /* is outside the dataflash */
 224         if (((int)addr & 0x0FFFFFFF) > (pdataFlash->pDevice->pages_size *
 225                 pdataFlash->pDevice->pages_number)) return 0;
 226         /* is too large for the dataflash */
 227         if (size > ((pdataFlash->pDevice->pages_size *
 228                 pdataFlash->pDevice->pages_number) - ((int)addr & 0x0FFFFFFF))) return 0;
 229
 230         return 1;
 231 }
 232 /*-----------------------------------------------------------------------------*/
 233 /* Function Name       : prot_dataflash                                         */
 234 /* Object              : Test if destination area is protected                  */
 235 /*-----------------------------------------------------------------------------*/
 236 int prot_dataflash (AT91PS_DataFlash pdataFlash, unsigned long addr)
 237 {
 238 int area;
 239         /* find area */
 240         for (area=0; area < NB_DATAFLASH_AREA; area++) {
 241                 if ((addr >= pdataFlash->pDevice->area_list[area].start) &&
 242                         (addr < pdataFlash->pDevice->area_list[area].end))
 243                         break;
 244         }
 245         if (area == NB_DATAFLASH_AREA) return -1;
 246         /*test protection value*/
 247         if (pdataFlash->pDevice->area_list[area].protected == FLAG_PROTECT_SET) return 0;
 248
 249         return 1;
 250 }
 251 /*-----------------------------------------------------------------------------*/
 252 /* Function Name       : dataflash_real_protect                         */
 253 /* Object              : protect/unprotect area                         */
 254 /*-----------------------------------------------------------------------------*/
 255 int dataflash_real_protect (int flag, unsigned long start_addr, unsigned long end_addr)
 256 {
 257 int i,j, area1, area2, addr_valid = 0;
 258         /* find dataflash */
 259         for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++) {
 260                 if ((((int) start_addr) & 0xF0000000) ==
 261                         dataflash_info[i].logical_address) {
 262                                 addr_valid = 1;
 263                                 break;
 264                 }
 265         }
 266         if (!addr_valid) {
 267                 return -1;
 268         }
 269         /* find start area */
 270         for (area1=0; area1 < NB_DATAFLASH_AREA; area1++) {
 271                 if (start_addr == dataflash_info[i].Device.area_list[area1].start) break;
 272         }
 273         if (area1 == NB_DATAFLASH_AREA) return -1;
 274         /* find end area */
 275         for (area2=0; area2 < NB_DATAFLASH_AREA; area2++) {
 276                 if (end_addr == dataflash_info[i].Device.area_list[area2].end) break;
 277         }
 278         if (area2 == NB_DATAFLASH_AREA) return -1;
 279
 280         /*set protection value*/
 281         for(j = area1; j < area2+1 ; j++)
 282                 if (flag == 0) dataflash_info[i].Device.area_list[j].protected = FLAG_PROTECT_CLEAR;
 283                 else dataflash_info[i].Device.area_list[j].protected = FLAG_PROTECT_SET;
 284
 285         return (area2-area1+1);
 286 }
 287
 288 /*------------------------------------------------------------------------------*/
 289 /* Function Name       : read_dataflash                                         */
 290 /* Object              : dataflash memory read                                  */
 291 /*------------------------------------------------------------------------------*/
 292 int read_dataflash (unsigned long addr, unsigned long size, char *result)
 293 {
 294         int AddrToRead = addr;
 295         AT91PS_DataFlash pFlash = &DataFlashInst;
 296
 297         pFlash = AT91F_DataflashSelect (pFlash, &AddrToRead);
 298
 299         if (pFlash == 0)
 300                 return ERR_UNKNOWN_FLASH_TYPE;
 301
 302         if (size_dataflash(pFlash,addr,size) == 0)
 303                 return ERR_INVAL;
 304
 305         return (AT91F_DataFlashRead (pFlash, AddrToRead, size, result));
 306 }
 307
 308
 309 /*-----------------------------------------------------------------------------*/
 310 /* Function Name       : write_dataflash                                       */
 311 /* Object              : write a block in dataflash                            */
 312 /*-----------------------------------------------------------------------------*/
 313 int write_dataflash (unsigned long addr_dest, unsigned long addr_src,
 314                      unsigned long size)
 315 {
 316         int AddrToWrite = addr_dest;
 317         AT91PS_DataFlash pFlash = &DataFlashInst;
 318
 319         pFlash = AT91F_DataflashSelect (pFlash, &AddrToWrite);
 320
 321         if (pFlash == 0)
 322                 return ERR_UNKNOWN_FLASH_TYPE;
 323
 324         if (size_dataflash(pFlash,addr_dest,size) == 0)
 325                 return ERR_INVAL;
 326
 327         if (prot_dataflash(pFlash,addr_dest) == 0)
 328                 return ERR_PROTECTED;
 329
 330         if (AddrToWrite == -1)
 331                 return -1;
 332
 333         return AT91F_DataFlashWrite (pFlash, (char *) addr_src, AddrToWrite, size);
 334 }
 335
 336
 337 void dataflash_perror (int err)
 338 {
 339         switch (err) {
 340         case ERR_OK:
 341                 break;
 342         case ERR_TIMOUT:
 343                 printf ("Timeout writing to DataFlash\n");
 344                 break;
 345         case ERR_PROTECTED:
 346                 printf ("Can't write to protected DataFlash sectors\n");
 347                 break;
 348         case ERR_INVAL:
 349                 printf ("Outside available DataFlash\n");
 350                 break;
 351         case ERR_UNKNOWN_FLASH_TYPE:
 352                 printf ("Unknown Type of DataFlash\n");
 353                 break;
 354         case ERR_PROG_ERROR:
 355                 printf ("General DataFlash Programming Error\n");
 356                 break;
 357         default:
 358                 printf ("%s[%d] FIXME: rc=%d\n", __FILE__, __LINE__, err);
 359                 break;
 360         }
 361 }
 362
 363 #endif