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, unsigned long *addr)
 178 {
 179         char addr_valid = 0;
 180         int i;
 181
 182         for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++)
 183                 if ((*addr & 0xFF000000) == dataflash_info[i].logical_address) {
 184                         addr_valid = 1;
 185                         break;
 186                 }
 187         if (!addr_valid) {
 188                 pFlash = (AT91PS_DataFlash) 0;
 189                 return pFlash;
 190         }
 191         pFlash->pDataFlashDesc = &(dataflash_info[i].Desc);
 192         pFlash->pDevice = &(dataflash_info[i].Device);
 193         *addr -= dataflash_info[i].logical_address;
 194         return (pFlash);
 195 }
 196
 197 /*------------------------------------------------------------------------------*/
 198 /* Function Name       : addr_dataflash                                         */
 199 /* Object              : Test if address is valid                               */
 200 /*------------------------------------------------------------------------------*/
 201 int addr_dataflash (unsigned long addr)
 202 {
 203         int addr_valid = 0;
 204         int i;
 205
 206         for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++) {
 207                 if ((((int) addr) & 0xFF000000) ==
 208                         dataflash_info[i].logical_address) {
 209                         addr_valid = 1;
 210                         break;
 211                 }
 212         }
 213
 214         return addr_valid;
 215 }
 216 /*-----------------------------------------------------------------------------*/
 217 /* Function Name       : size_dataflash                                         */
 218 /* Object              : Test if address is valid regarding the size            */
 219 /*-----------------------------------------------------------------------------*/
 220 int size_dataflash (AT91PS_DataFlash pdataFlash, unsigned long addr, unsigned long size)
 221 {
 222         /* is outside the dataflash */
 223         if (((int)addr & 0x0FFFFFFF) > (pdataFlash->pDevice->pages_size *
 224                 pdataFlash->pDevice->pages_number)) return 0;
 225         /* is too large for the dataflash */
 226         if (size > ((pdataFlash->pDevice->pages_size *
 227                 pdataFlash->pDevice->pages_number) - ((int)addr & 0x0FFFFFFF))) return 0;
 228
 229         return 1;
 230 }
 231 /*-----------------------------------------------------------------------------*/
 232 /* Function Name       : prot_dataflash                                         */
 233 /* Object              : Test if destination area is protected                  */
 234 /*-----------------------------------------------------------------------------*/
 235 int prot_dataflash (AT91PS_DataFlash pdataFlash, unsigned long addr)
 236 {
 237 int area;
 238         /* find area */
 239         for (area=0; area < NB_DATAFLASH_AREA; area++) {
 240                 if ((addr >= pdataFlash->pDevice->area_list[area].start) &&
 241                         (addr < pdataFlash->pDevice->area_list[area].end))
 242                         break;
 243         }
 244         if (area == NB_DATAFLASH_AREA) return -1;
 245         /*test protection value*/
 246         if (pdataFlash->pDevice->area_list[area].protected == FLAG_PROTECT_SET) return 0;
 247
 248         return 1;
 249 }
 250 /*-----------------------------------------------------------------------------*/
 251 /* Function Name       : dataflash_real_protect                         */
 252 /* Object              : protect/unprotect area                         */
 253 /*-----------------------------------------------------------------------------*/
 254 int dataflash_real_protect (int flag, unsigned long start_addr, unsigned long end_addr)
 255 {
 256 int i,j, area1, area2, addr_valid = 0;
 257         /* find dataflash */
 258         for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++) {
 259                 if ((((int) start_addr) & 0xF0000000) ==
 260                         dataflash_info[i].logical_address) {
 261                                 addr_valid = 1;
 262                                 break;
 263                 }
 264         }
 265         if (!addr_valid) {
 266                 return -1;
 267         }
 268         /* find start area */
 269         for (area1=0; area1 < NB_DATAFLASH_AREA; area1++) {
 270                 if (start_addr == dataflash_info[i].Device.area_list[area1].start) break;
 271         }
 272         if (area1 == NB_DATAFLASH_AREA) return -1;
 273         /* find end area */
 274         for (area2=0; area2 < NB_DATAFLASH_AREA; area2++) {
 275                 if (end_addr == dataflash_info[i].Device.area_list[area2].end) break;
 276         }
 277         if (area2 == NB_DATAFLASH_AREA) return -1;
 278
 279         /*set protection value*/
 280         for(j = area1; j < area2+1 ; j++)
 281                 if (flag == 0) dataflash_info[i].Device.area_list[j].protected = FLAG_PROTECT_CLEAR;
 282                 else dataflash_info[i].Device.area_list[j].protected = FLAG_PROTECT_SET;
 283
 284         return (area2-area1+1);
 285 }
 286
 287 /*------------------------------------------------------------------------------*/
 288 /* Function Name       : read_dataflash                                         */
 289 /* Object              : dataflash memory read                                  */
 290 /*------------------------------------------------------------------------------*/
 291 int read_dataflash (unsigned long addr, unsigned long size, char *result)
 292 {
 293         unsigned long AddrToRead = addr;
 294         AT91PS_DataFlash pFlash = &DataFlashInst;
 295
 296         pFlash = AT91F_DataflashSelect (pFlash, &AddrToRead);
 297
 298         if (pFlash == 0)
 299                 return ERR_UNKNOWN_FLASH_TYPE;
 300
 301         if (size_dataflash(pFlash,addr,size) == 0)
 302                 return ERR_INVAL;
 303
 304         return (AT91F_DataFlashRead (pFlash, AddrToRead, size, result));
 305 }
 306
 307
 308 /*-----------------------------------------------------------------------------*/
 309 /* Function Name       : write_dataflash                                       */
 310 /* Object              : write a block in dataflash                            */
 311 /*-----------------------------------------------------------------------------*/
 312 int write_dataflash (unsigned long addr_dest, unsigned long addr_src,
 313                      unsigned long size)
 314 {
 315         unsigned long AddrToWrite = addr_dest;
 316         AT91PS_DataFlash pFlash = &DataFlashInst;
 317
 318         pFlash = AT91F_DataflashSelect (pFlash, &AddrToWrite);
 319
 320         if (pFlash == 0)
 321                 return ERR_UNKNOWN_FLASH_TYPE;
 322
 323         if (size_dataflash(pFlash,addr_dest,size) == 0)
 324                 return ERR_INVAL;
 325
 326         if (prot_dataflash(pFlash,addr_dest) == 0)
 327                 return ERR_PROTECTED;
 328
 329         if (AddrToWrite == -1)
 330                 return -1;
 331
 332         return AT91F_DataFlashWrite (pFlash, (uchar *)addr_src, AddrToWrite, size);
 333 }
 334
 335
 336 void dataflash_perror (int err)
 337 {
 338         switch (err) {
 339         case ERR_OK:
 340                 break;
 341         case ERR_TIMOUT:
 342                 printf ("Timeout writing to DataFlash\n");
 343                 break;
 344         case ERR_PROTECTED:
 345                 printf ("Can't write to protected DataFlash sectors\n");
 346                 break;
 347         case ERR_INVAL:
 348                 printf ("Outside available DataFlash\n");
 349                 break;
 350         case ERR_UNKNOWN_FLASH_TYPE:
 351                 printf ("Unknown Type of DataFlash\n");
 352                 break;
 353         case ERR_PROG_ERROR:
 354                 printf ("General DataFlash Programming Error\n");
 355                 break;
 356         default:
 357                 printf ("%s[%d] FIXME: rc=%d\n", __FILE__, __LINE__, err);
 358                 break;
 359         }
 360 }
 361
 362 #endif