LXR uboot/board/cobra5272/flash.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2000-2003
   4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   5 */
   6
   7#include <common.h>
   8#include <console.h>
   9
  10#define PHYS_FLASH_1 CONFIG_SYS_FLASH_BASE
  11#define FLASH_BANK_SIZE 0x200000
  12
  13flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  14
  15void flash_print_info (flash_info_t * info)
  16{
  17        int i;
  18
  19        switch (info->flash_id & FLASH_VENDMASK) {
  20        case (AMD_MANUFACT & FLASH_VENDMASK):
  21                printf ("AMD: ");
  22                break;
  23        default:
  24                printf ("Unknown Vendor ");
  25                break;
  26        }
  27
  28        switch (info->flash_id & FLASH_TYPEMASK) {
  29        case (AMD_ID_PL160CB & FLASH_TYPEMASK):
  30                printf ("AM29PL160CB (16Mbit)\n");
  31                break;
  32        default:
  33                printf ("Unknown Chip Type\n");
  34                goto Done;
  35                break;
  36        }
  37
  38        printf ("  Size: %ld MB in %d Sectors\n",
  39                info->size >> 20, info->sector_count);
  40
  41        printf ("  Sector Start Addresses:");
  42        for (i = 0; i < info->sector_count; i++) {
  43                if ((i % 5) == 0) {
  44                        printf ("\n   ");
  45                }
  46                printf (" %08lX%s", info->start[i],
  47                        info->protect[i] ? " (RO)" : "     ");
  48        }
  49        printf ("\n");
  50
  51Done:
  52        return;
  53}
  54
  55
  56unsigned long flash_init (void)
  57{
  58        int i, j;
  59        ulong size = 0;
  60
  61        for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
  62                ulong flashbase = 0;
  63
  64                flash_info[i].flash_id =
  65                        (AMD_MANUFACT & FLASH_VENDMASK) |
  66                        (AMD_ID_PL160CB & FLASH_TYPEMASK);
  67                flash_info[i].size = FLASH_BANK_SIZE;
  68                flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
  69                memset (flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
  70                if (i == 0)
  71                        flashbase = PHYS_FLASH_1;
  72                else
  73                        panic ("configured to many flash banks!\n");
  74
  75                for (j = 0; j < flash_info[i].sector_count; j++) {
  76                        if (j == 0) {
  77                                /* 1st is 16 KiB */
  78                                flash_info[i].start[j] = flashbase;
  79                        }
  80                        if ((j >= 1) && (j <= 2)) {
  81                                /* 2nd and 3rd are 8 KiB */
  82                                flash_info[i].start[j] =
  83                                        flashbase + 0x4000 + 0x2000 * (j - 1);
  84                        }
  85                        if (j == 3) {
  86                                /* 4th is 224 KiB */
  87                                flash_info[i].start[j] = flashbase + 0x8000;
  88                        }
  89                        if ((j >= 4) && (j <= 10)) {
  90                                /* rest is 256 KiB */
  91                                flash_info[i].start[j] =
  92                                        flashbase + 0x40000 + 0x40000 * (j -
  93                                                                         4);
  94                        }
  95                }
  96                size += flash_info[i].size;
  97        }
  98
  99        flash_protect (FLAG_PROTECT_SET,
 100                       CONFIG_SYS_FLASH_BASE,
 101                       CONFIG_SYS_FLASH_BASE + 0x3ffff, &flash_info[0]);
 102
 103        return size;
 104}
 105
 106
 107#define CMD_READ_ARRAY          0x00F0
 108#define CMD_UNLOCK1             0x00AA
 109#define CMD_UNLOCK2             0x0055
 110#define CMD_ERASE_SETUP         0x0080
 111#define CMD_ERASE_CONFIRM       0x0030
 112#define CMD_PROGRAM             0x00A0
 113#define CMD_UNLOCK_BYPASS       0x0020
 114
 115#define MEM_FLASH_ADDR1         (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x00000555<<1)))
 116#define MEM_FLASH_ADDR2         (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x000002AA<<1)))
 117
 118#define BIT_ERASE_DONE          0x0080
 119#define BIT_RDY_MASK            0x0080
 120#define BIT_PROGRAM_ERROR       0x0020
 121#define BIT_TIMEOUT             0x80000000      /* our flag */
 122
 123#define READY 1
 124#define ERR   2
 125#define TMO   4
 126
 127
 128int flash_erase (flash_info_t * info, int s_first, int s_last)
 129{
 130        ulong result;
 131        int iflag, cflag, prot, sect;
 132        int rc = ERR_OK;
 133        int chip1;
 134        ulong start;
 135
 136        /* first look for protection bits */
 137
 138        if (info->flash_id == FLASH_UNKNOWN)
 139                return ERR_UNKNOWN_FLASH_TYPE;
 140
 141        if ((s_first < 0) || (s_first > s_last)) {
 142                return ERR_INVAL;
 143        }
 144
 145        if ((info->flash_id & FLASH_VENDMASK) !=
 146            (AMD_MANUFACT & FLASH_VENDMASK)) {
 147                return ERR_UNKNOWN_FLASH_VENDOR;
 148        }
 149
 150        prot = 0;
 151        for (sect = s_first; sect <= s_last; ++sect) {
 152                if (info->protect[sect]) {
 153                        prot++;
 154                }
 155        }
 156        if (prot)
 157                return ERR_PROTECTED;
 158
 159        /*
 160         * Disable interrupts which might cause a timeout
 161         * here. Remember that our exception vectors are
 162         * at address 0 in the flash, and we don't want a
 163         * (ticker) exception to happen while the flash
 164         * chip is in programming mode.
 165         */
 166
 167        cflag = icache_status ();
 168        icache_disable ();
 169        iflag = disable_interrupts ();
 170
 171        printf ("\n");
 172
 173        /* Start erase on unprotected sectors */
 174        for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
 175                printf ("Erasing sector %2d ... ", sect);
 176
 177                /* arm simple, non interrupt dependent timer */
 178                start = get_timer(0);
 179
 180                if (info->protect[sect] == 0) { /* not protected */
 181                        volatile u16 *addr =
 182                                (volatile u16 *) (info->start[sect]);
 183
 184                        MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 185                        MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 186                        MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
 187
 188                        MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 189                        MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 190                        *addr = CMD_ERASE_CONFIRM;
 191
 192                        /* wait until flash is ready */
 193                        chip1 = 0;
 194
 195                        do {
 196                                result = *addr;
 197
 198                                /* check timeout */
 199                                if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 200                                        MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
 201                                        chip1 = TMO;
 202                                        break;
 203                                }
 204
 205                                if (!chip1
 206                                    && (result & 0xFFFF) & BIT_ERASE_DONE)
 207                                        chip1 = READY;
 208
 209                        } while (!chip1);
 210
 211                        MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
 212
 213                        if (chip1 == ERR) {
 214                                rc = ERR_PROG_ERROR;
 215                                goto outahere;
 216                        }
 217                        if (chip1 == TMO) {
 218                                rc = ERR_TIMEOUT;
 219                                goto outahere;
 220                        }
 221
 222                        printf ("ok.\n");
 223                } else {        /* it was protected */
 224
 225                        printf ("protected!\n");
 226                }
 227        }
 228
 229        if (ctrlc ())
 230                printf ("User Interrupt!\n");
 231
 232      outahere:
 233        /* allow flash to settle - wait 10 ms */
 234        udelay (10000);
 235
 236        if (iflag)
 237                enable_interrupts ();
 238
 239        if (cflag)
 240                icache_enable ();
 241
 242        return rc;
 243}
 244
 245static int write_word (flash_info_t * info, ulong dest, ulong data)
 246{
 247        volatile u16 *addr = (volatile u16 *) dest;
 248        ulong result;
 249        int rc = ERR_OK;
 250        int cflag, iflag;
 251        int chip1;
 252        ulong start;
 253
 254        /*
 255         * Check if Flash is (sufficiently) erased
 256         */
 257        result = *addr;
 258        if ((result & data) != data)
 259                return ERR_NOT_ERASED;
 260
 261
 262        /*
 263         * Disable interrupts which might cause a timeout
 264         * here. Remember that our exception vectors are
 265         * at address 0 in the flash, and we don't want a
 266         * (ticker) exception to happen while the flash
 267         * chip is in programming mode.
 268         */
 269
 270        cflag = icache_status ();
 271        icache_disable ();
 272        iflag = disable_interrupts ();
 273
 274        MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 275        MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 276        MEM_FLASH_ADDR1 = CMD_PROGRAM;
 277        *addr = data;
 278
 279        /* arm simple, non interrupt dependent timer */
 280        start = get_timer(0);
 281
 282        /* wait until flash is ready */
 283        chip1 = 0;
 284        do {
 285                result = *addr;
 286
 287                /* check timeout */
 288                if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 289                        chip1 = ERR | TMO;
 290                        break;
 291                }
 292                if (!chip1 && ((result & 0x80) == (data & 0x80)))
 293                        chip1 = READY;
 294
 295        } while (!chip1);
 296
 297        *addr = CMD_READ_ARRAY;
 298
 299        if (chip1 == ERR || *addr != data)
 300                rc = ERR_PROG_ERROR;
 301
 302        if (iflag)
 303                enable_interrupts ();
 304
 305        if (cflag)
 306                icache_enable ();
 307
 308        return rc;
 309}
 310
 311
 312int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 313{
 314        ulong wp, data;
 315        int rc;
 316
 317        if (addr & 1) {
 318                printf ("unaligned destination not supported\n");
 319                return ERR_ALIGN;
 320        }
 321
 322#if 0
 323        if (cnt & 1) {
 324                printf ("odd transfer sizes not supported\n");
 325                return ERR_ALIGN;
 326        }
 327#endif
 328
 329        wp = addr;
 330
 331        if (addr & 1) {
 332                data = (*((volatile u8 *) addr) << 8) | *((volatile u8 *)
 333                                                          src);
 334                if ((rc = write_word (info, wp - 1, data)) != 0) {
 335                        return (rc);
 336                }
 337                src += 1;
 338                wp += 1;
 339                cnt -= 1;
 340        }
 341
 342        while (cnt >= 2) {
 343                data = *((volatile u16 *) src);
 344                if ((rc = write_word (info, wp, data)) != 0) {
 345                        return (rc);
 346                }
 347                src += 2;
 348                wp += 2;
 349                cnt -= 2;
 350        }
 351
 352        if (cnt == 1) {
 353                data = (*((volatile u8 *) src) << 8) |
 354                        *((volatile u8 *) (wp + 1));
 355                if ((rc = write_word (info, wp, data)) != 0) {
 356                        return (rc);
 357                }
 358                src += 1;
 359                wp += 1;
 360                cnt -= 1;
 361        }
 362
 363        return ERR_OK;
 364}
 365