LXR uboot/board/ep8260/flash.c

   1/*
   2 * (C) Copyright 2001, 2002
   3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4 *
   5 * (C) Copyright 2002
   6 * Frank Panno <fpanno@delphintech.com>, Delphin Technology AG
   7 *
   8 * Flash Routines for AMD device AM29DL323DB on the EP8260 board.
   9 *
  10 * This file is based on board/tqm8260/flash.c.
  11 *--------------------------------------------------------------------
  12 * SPDX-License-Identifier:     GPL-2.0+
  13 */
  14
  15#include <common.h>
  16#include <mpc8xx.h>
  17
  18#define V_ULONG(a)      (*(volatile unsigned long *)( a ))
  19#define V_BYTE(a)       (*(volatile unsigned char *)( a ))
  20
  21
  22flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  23
  24
  25/*-----------------------------------------------------------------------
  26 */
  27void flash_reset(void)
  28{
  29        if( flash_info[0].flash_id != FLASH_UNKNOWN ) {
  30                V_ULONG( flash_info[0].start[0] ) = 0x00F000F0;
  31                V_ULONG( flash_info[0].start[0] + 4 ) = 0x00F000F0;
  32        }
  33}
  34
  35/*-----------------------------------------------------------------------
  36 */
  37ulong flash_get_size( ulong baseaddr, flash_info_t *info )
  38{
  39        short i;
  40        unsigned long flashtest_h, flashtest_l;
  41
  42        /* Write auto select command sequence and test FLASH answer */
  43        V_ULONG(baseaddr + ((ulong)0x0555 << 3)) = 0x00AA00AA;
  44        V_ULONG(baseaddr + ((ulong)0x02AA << 3)) = 0x00550055;
  45        V_ULONG(baseaddr + ((ulong)0x0555 << 3)) = 0x00900090;
  46        V_ULONG(baseaddr + 4 + ((ulong)0x0555 << 3)) = 0x00AA00AA;
  47        V_ULONG(baseaddr + 4 + ((ulong)0x02AA << 3)) = 0x00550055;
  48        V_ULONG(baseaddr + 4 + ((ulong)0x0555 << 3)) = 0x00900090;
  49
  50        flashtest_h = V_ULONG(baseaddr);                /* manufacturer ID         */
  51        flashtest_l = V_ULONG(baseaddr + 4);
  52
  53        if ((int)flashtest_h == AMD_MANUFACT) {
  54                info->flash_id = FLASH_MAN_AMD;
  55        } else {
  56                info->flash_id = FLASH_UNKNOWN;
  57                info->sector_count = 0;
  58                info->size = 0;
  59                return (0);                             /* no or unknown flash     */
  60        }
  61
  62        flashtest_h = V_ULONG(baseaddr + 8);            /* device ID               */
  63        flashtest_l = V_ULONG(baseaddr + 12);
  64        if (flashtest_h != flashtest_l) {
  65                info->flash_id = FLASH_UNKNOWN;
  66                return(0);
  67        }
  68
  69        switch((int)flashtest_h) {
  70        case AMD_ID_DL323B:
  71                info->flash_id += FLASH_AMDL323B;
  72                info->sector_count = 71;
  73                info->size = 0x01000000;         /* 4 * 4 MB = 16 MB    */
  74                break;
  75        case AMD_ID_LV640U:     /* AMDLV640 and AMDLV641 have same ID */
  76                info->flash_id += FLASH_AMLV640U;
  77                info->sector_count = 128;
  78                info->size = 0x02000000;        /* 4 * 8 MB = 32 MB     */
  79                break;
  80        default:
  81                info->flash_id = FLASH_UNKNOWN;
  82                return(0);                              /* no or unknown flash     */
  83        }
  84
  85        if(flashtest_h == AMD_ID_LV640U) {
  86                /* set up sector start adress table (uniform sector type) */
  87                for (i = 0; i < info->sector_count; i++)
  88                        info->start[i] = baseaddr + (i * 0x00040000);
  89        } else {
  90                /* set up sector start adress table (bottom sector type) */
  91                for (i = 0; i < 8; i++) {
  92                        info->start[i] = baseaddr + (i * 0x00008000);
  93                }
  94                for (i = 8; i < info->sector_count; i++) {
  95                        info->start[i] = baseaddr + (i * 0x00040000) - 0x001C0000;
  96                }
  97        }
  98        /* check for protected sectors */
  99        for (i = 0; i < info->sector_count; i++) {
 100                /* read sector protection at sector address, (A7 .. A0) = 0x02 */
 101                if ((V_ULONG( info->start[i] + 16 ) & 0x00010001) ||
 102                    (V_ULONG( info->start[i] + 20 ) & 0x00010001)) {
 103                        info->protect[i] = 1;           /* D0 = 1 if protected */
 104                } else {
 105                        info->protect[i] = 0;
 106                }
 107        }
 108
 109        flash_reset();
 110        return(info->size);
 111}
 112
 113/*-----------------------------------------------------------------------
 114 */
 115unsigned long flash_init (void)
 116{
 117        unsigned long size_b0 = 0;
 118        int i;
 119
 120        /* Init: no FLASHes known */
 121        for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
 122                flash_info[i].flash_id = FLASH_UNKNOWN;
 123        }
 124
 125        /* Static FLASH Bank configuration here (only one bank) */
 126
 127        size_b0 = flash_get_size(CONFIG_SYS_FLASH0_BASE, &flash_info[0]);
 128        if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {
 129                printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
 130                        size_b0, size_b0>>20);
 131        }
 132
 133        /*
 134         * protect monitor and environment sectors
 135         */
 136
 137#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH0_BASE
 138        flash_protect(FLAG_PROTECT_SET,
 139                      CONFIG_SYS_MONITOR_BASE,
 140                      CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
 141                      &flash_info[0]);
 142#endif
 143
 144#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
 145# ifndef  CONFIG_ENV_SIZE
 146#  define CONFIG_ENV_SIZE       CONFIG_ENV_SECT_SIZE
 147# endif
 148        flash_protect(FLAG_PROTECT_SET,
 149                      CONFIG_ENV_ADDR,
 150                      CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
 151                      &flash_info[0]);
 152#endif
 153
 154        return (size_b0);
 155}
 156
 157/*-----------------------------------------------------------------------
 158 */
 159void flash_print_info  (flash_info_t *info)
 160{
 161        int i;
 162
 163        if (info->flash_id == FLASH_UNKNOWN) {
 164                printf ("missing or unknown FLASH type\n");
 165                return;
 166        }
 167
 168        switch ((info->flash_id >> 16) & 0xff) {
 169        case FLASH_MAN_AMD:         printf ("AMD ");                break;
 170        default:                    printf ("Unknown Vendor ");     break;
 171        }
 172
 173        switch (info->flash_id & FLASH_TYPEMASK) {
 174        case FLASH_AMDL323B:    printf ("29DL323B (32 M, bottom sector)\n");
 175                                break;
 176        case FLASH_AMLV640U:    printf ("29LV640U (64 M, uniform sector)\n");
 177                                break;
 178        default:                printf ("Unknown Chip Type\n");
 179                                break;
 180        }
 181
 182        printf ("  Size: %ld MB in %d Sectors\n",
 183                info->size >> 20, info->sector_count);
 184
 185        printf ("  Sector Start Addresses:");
 186        for (i=0; i<info->sector_count; ++i) {
 187                if ((i % 5) == 0)
 188                        printf ("\n   ");
 189                printf (" %08lX%s",
 190                        info->start[i],
 191                        info->protect[i] ? " (RO)" : "     "
 192                        );
 193        }
 194        printf ("\n");
 195        return;
 196}
 197
 198/*-----------------------------------------------------------------------
 199 */
 200int flash_erase (flash_info_t *info, int s_first, int s_last)
 201{
 202        int flag, prot, sect, l_sect;
 203        ulong start, now, last;
 204
 205        if ((s_first < 0) || (s_first > s_last)) {
 206                if (info->flash_id == FLASH_UNKNOWN) {
 207                        printf ("- missing\n");
 208                } else {
 209                        printf ("- no sectors to erase\n");
 210                }
 211                return 1;
 212        }
 213
 214        prot = 0;
 215        for (sect = s_first; sect <= s_last; sect++) {
 216                if (info->protect[sect])
 217                        prot++;
 218        }
 219
 220        if (prot) {
 221                printf ("- Warning: %d protected sectors will not be erased!\n",
 222                        prot);
 223        } else {
 224                printf ("\n");
 225        }
 226
 227        l_sect = -1;
 228
 229        /* Disable interrupts which might cause a timeout here */
 230        flag = disable_interrupts();
 231
 232        V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
 233        V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
 234        V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00800080;
 235        V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
 236        V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
 237        V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
 238        V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
 239        V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00800080;
 240        V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
 241        V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
 242        udelay (1000);
 243
 244        /* Start erase on unprotected sectors */
 245        for (sect = s_first; sect<=s_last; sect++) {
 246                if (info->protect[sect] == 0) { /* not protected */
 247                        V_ULONG( info->start[sect] ) = 0x00300030;
 248                        V_ULONG( info->start[sect] + 4 ) = 0x00300030;
 249                        l_sect = sect;
 250                }
 251        }
 252
 253        /* re-enable interrupts if necessary */
 254        if (flag)
 255                enable_interrupts();
 256
 257        /* wait at least 80us - let's wait 1 ms */
 258        udelay (1000);
 259
 260        /*
 261         * We wait for the last triggered sector
 262         */
 263        if (l_sect < 0)
 264                goto DONE;
 265
 266        start = get_timer (0);
 267        last  = start;
 268        while ((V_ULONG( info->start[l_sect] ) & 0x00800080) != 0x00800080 ||
 269               (V_ULONG( info->start[l_sect] + 4 ) & 0x00800080) != 0x00800080)
 270        {
 271                if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 272                        printf ("Timeout\n");
 273                        return 1;
 274                }
 275                /* show that we're waiting */
 276                if ((now - last) > 1000) {      /* every second */
 277                        serial_putc ('.');
 278                        last = now;
 279                }
 280        }
 281
 282 DONE:
 283        /* reset to read mode */
 284        flash_reset ();
 285
 286        printf (" done\n");
 287        return 0;
 288}
 289
 290static int write_dword (flash_info_t *, ulong, unsigned char *);
 291
 292/*-----------------------------------------------------------------------
 293 * Copy memory to flash, returns:
 294 * 0 - OK
 295 * 1 - write timeout
 296 * 2 - Flash not erased
 297 */
 298
 299int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 300{
 301        ulong dp;
 302        static unsigned char bb[8];
 303        int i, l, rc, cc = cnt;
 304
 305        dp = (addr & ~7);       /* get lower dword aligned address */
 306
 307        /*
 308         * handle unaligned start bytes
 309         */
 310        if ((l = addr - dp) != 0) {
 311                for (i = 0; i < 8; i++)
 312                        bb[i] = (i < l || (i-l) >= cc) ? V_BYTE(dp+i) : *src++;
 313                if ((rc = write_dword(info, dp, bb)) != 0)
 314                {
 315                        return (rc);
 316                }
 317                dp += 8;
 318                cc -= 8 - l;
 319        }
 320
 321        /*
 322         * handle word aligned part
 323         */
 324        while (cc >= 8) {
 325                if ((rc = write_dword(info, dp, src)) != 0) {
 326                        return (rc);
 327                }
 328                dp  += 8;
 329                src += 8;
 330                cc -= 8;
 331        }
 332
 333        if (cc <= 0) {
 334                return (0);
 335        }
 336
 337        /*
 338         * handle unaligned tail bytes
 339         */
 340        for (i = 0; i < 8; i++) {
 341                bb[i] = (i < cc) ? *src++ : V_BYTE(dp+i);
 342        }
 343        return (write_dword(info, dp, bb));
 344}
 345
 346/*-----------------------------------------------------------------------
 347 * Write a dword to Flash, returns:
 348 * 0 - OK
 349 * 1 - write timeout
 350 * 2 - Flash not erased
 351 */
 352static int write_dword (flash_info_t *info, ulong dest, unsigned char * pdata)
 353{
 354        ulong start;
 355        ulong cl = 0, ch =0;
 356        int flag, i;
 357
 358        for (ch=0, i=0; i < 4; i++)
 359                ch = (ch << 8) + *pdata++;      /* high word    */
 360        for (cl=0, i=0; i < 4; i++)
 361                cl = (cl << 8) + *pdata++;      /* low word     */
 362
 363        /* Check if Flash is (sufficiently) erased */
 364        if ((*((vu_long *)dest) & ch)   != ch
 365            ||(*((vu_long *)(dest + 4)) & cl)   != cl)
 366        {
 367                return (2);
 368        }
 369
 370        /* Disable interrupts which might cause a timeout here */
 371        flag = disable_interrupts();
 372
 373        V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
 374        V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
 375        V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00A000A0;
 376        V_ULONG( dest ) = ch;
 377        V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
 378        V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
 379        V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00A000A0;
 380        V_ULONG( dest + 4 ) = cl;
 381
 382        /* re-enable interrupts if necessary */
 383        if (flag)
 384                enable_interrupts();
 385
 386        /* data polling for D7 */
 387        start = get_timer (0);
 388        while (((V_ULONG( dest ) & 0x00800080) != (ch & 0x00800080)) ||
 389               ((V_ULONG( dest + 4 ) & 0x00800080) != (cl & 0x00800080))) {
 390                if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 391                        return (1);
 392                }
 393        }
 394        return (0);
 395}
 396