wdenk | affae2b | 2002-08-17 09:36:01 +0000 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2001 |
| 3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| 4 | * |
| 5 | * See file CREDITS for list of people who contributed to this |
| 6 | * project. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License as |
| 10 | * published by the Free Software Foundation; either version 2 of |
| 11 | * the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 21 | * MA 02111-1307 USA |
| 22 | */ |
| 23 | |
| 24 | #include <common.h> |
| 25 | #include <mpc824x.h> |
| 26 | |
| 27 | #if defined(CFG_ENV_IS_IN_FLASH) |
| 28 | # ifndef CFG_ENV_ADDR |
| 29 | # define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET) |
| 30 | # endif |
| 31 | # ifndef CFG_ENV_SIZE |
| 32 | # define CFG_ENV_SIZE CFG_ENV_SECT_SIZE |
| 33 | # endif |
| 34 | # ifndef CFG_ENV_SECT_SIZE |
| 35 | # define CFG_ENV_SECT_SIZE CFG_ENV_SIZE |
| 36 | # endif |
| 37 | #endif |
| 38 | |
| 39 | /*---------------------------------------------------------------------*/ |
| 40 | #undef DEBUG_FLASH |
| 41 | |
| 42 | #ifdef DEBUG_FLASH |
| 43 | #define DEBUGF(fmt,args...) printf(fmt ,##args) |
| 44 | #else |
| 45 | #define DEBUGF(fmt,args...) |
| 46 | #endif |
| 47 | /*---------------------------------------------------------------------*/ |
| 48 | |
| 49 | flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
| 50 | |
| 51 | /*----------------------------------------------------------------------- |
| 52 | * Functions |
| 53 | */ |
| 54 | static ulong flash_get_size (vu_char *addr, flash_info_t *info); |
| 55 | static int write_data (flash_info_t *info, uchar *dest, uchar data); |
| 56 | static void flash_get_offsets (ulong base, flash_info_t *info); |
| 57 | |
| 58 | |
wdenk | affae2b | 2002-08-17 09:36:01 +0000 | [diff] [blame] | 59 | /* |
| 60 | * don't ask. its stupid, but more than one soul has had to live with this mistake |
| 61 | * "swaptab[i]" is the value of "i" with the bits reversed. |
| 62 | */ |
| 63 | |
| 64 | #define MUSENKI_BROKEN_FLASH 1 |
| 65 | |
| 66 | #ifdef MUSENKI_BROKEN_FLASH |
| 67 | unsigned char swaptab[256] = { |
| 68 | 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, |
| 69 | 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0, |
| 70 | 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, |
| 71 | 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, |
| 72 | 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, |
| 73 | 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4, |
| 74 | 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, |
| 75 | 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, |
| 76 | 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, |
| 77 | 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, |
| 78 | 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, |
| 79 | 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, |
| 80 | 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, |
| 81 | 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6, |
| 82 | 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, |
| 83 | 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, |
| 84 | 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, |
| 85 | 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1, |
| 86 | 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, |
| 87 | 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, |
| 88 | 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, |
| 89 | 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, |
| 90 | 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, |
| 91 | 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd, |
| 92 | 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, |
| 93 | 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, |
| 94 | 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, |
| 95 | 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, |
| 96 | 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, |
| 97 | 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, |
| 98 | 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, |
| 99 | 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff, |
| 100 | }; |
| 101 | |
| 102 | #define BS(b) (swaptab[b]) |
| 103 | |
| 104 | #else |
| 105 | |
| 106 | #define BS(b) (b) |
| 107 | |
| 108 | #endif |
| 109 | |
| 110 | #define BYTEME(x) ((x) & 0xFF) |
| 111 | |
| 112 | /*----------------------------------------------------------------------- |
| 113 | */ |
| 114 | |
| 115 | unsigned long flash_init (void) |
| 116 | { |
| 117 | unsigned long size_b0, size_b1; |
| 118 | int i; |
| 119 | |
| 120 | /* Init: no FLASHes known */ |
| 121 | for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) { |
| 122 | flash_info[i].flash_id = FLASH_UNKNOWN; |
| 123 | } |
| 124 | |
| 125 | /* Static FLASH Bank configuration here - FIXME XXX */ |
| 126 | |
| 127 | DEBUGF("\n## Get flash bank 1 size @ 0x%08x\n",CFG_FLASH_BASE0_PRELIM); |
| 128 | |
| 129 | size_b0 = flash_get_size((vu_char *)CFG_FLASH_BASE0_PRELIM, &flash_info[0]); |
| 130 | |
| 131 | if (flash_info[0].flash_id == FLASH_UNKNOWN) { |
| 132 | printf ("## Unknown FLASH on Bank 0: " |
| 133 | "ID 0x%lx, Size = 0x%08lx = %ld MB\n", |
| 134 | flash_info[0].flash_id, |
| 135 | size_b0, size_b0<<20); |
| 136 | } |
| 137 | |
| 138 | DEBUGF("## Get flash bank 2 size @ 0x%08x\n",CFG_FLASH_BASE1_PRELIM); |
| 139 | size_b1 = flash_get_size((vu_char *)CFG_FLASH_BASE1_PRELIM, &flash_info[1]); |
| 140 | |
| 141 | DEBUGF("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1); |
| 142 | |
| 143 | flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]); |
| 144 | |
| 145 | flash_info[0].size = size_b0; |
| 146 | |
| 147 | #if CFG_MONITOR_BASE >= CFG_FLASH_BASE |
wdenk | b9a83a9 | 2003-05-30 12:48:29 +0000 | [diff] [blame] | 148 | DEBUGF("protect monitor %x @ %x\n", CFG_MONITOR_BASE, monitor_flash_len); |
wdenk | affae2b | 2002-08-17 09:36:01 +0000 | [diff] [blame] | 149 | /* monitor protection ON by default */ |
| 150 | flash_protect(FLAG_PROTECT_SET, |
| 151 | CFG_MONITOR_BASE, |
wdenk | b9a83a9 | 2003-05-30 12:48:29 +0000 | [diff] [blame] | 152 | CFG_MONITOR_BASE+monitor_flash_len-1, |
wdenk | affae2b | 2002-08-17 09:36:01 +0000 | [diff] [blame] | 153 | &flash_info[0]); |
| 154 | #endif |
| 155 | |
| 156 | #ifdef CFG_ENV_IS_IN_FLASH |
| 157 | /* ENV protection ON by default */ |
| 158 | DEBUGF("protect environtment %x @ %x\n", CFG_ENV_ADDR, CFG_ENV_SECT_SIZE); |
| 159 | flash_protect(FLAG_PROTECT_SET, |
| 160 | CFG_ENV_ADDR, |
| 161 | CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1, |
| 162 | &flash_info[0]); |
| 163 | #endif |
| 164 | |
| 165 | if (size_b1) { |
| 166 | flash_info[1].size = size_b1; |
| 167 | flash_get_offsets (CFG_FLASH_BASE + size_b0, &flash_info[1]); |
| 168 | |
| 169 | #if CFG_MONITOR_BASE >= CFG_FLASH_BASE |
| 170 | /* monitor protection ON by default */ |
| 171 | flash_protect(FLAG_PROTECT_SET, |
| 172 | CFG_MONITOR_BASE, |
wdenk | b9a83a9 | 2003-05-30 12:48:29 +0000 | [diff] [blame] | 173 | CFG_MONITOR_BASE+monitor_flash_len-1, |
wdenk | affae2b | 2002-08-17 09:36:01 +0000 | [diff] [blame] | 174 | &flash_info[1]); |
| 175 | #endif |
| 176 | |
| 177 | #ifdef CFG_ENV_IS_IN_FLASH |
| 178 | /* ENV protection ON by default */ |
| 179 | flash_protect(FLAG_PROTECT_SET, |
| 180 | CFG_ENV_ADDR, |
| 181 | CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1, |
| 182 | &flash_info[1]); |
| 183 | #endif |
| 184 | } else { |
| 185 | flash_info[1].flash_id = FLASH_UNKNOWN; |
| 186 | flash_info[1].sector_count = -1; |
| 187 | flash_info[1].size = 0; |
| 188 | } |
| 189 | |
| 190 | DEBUGF("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1); |
| 191 | |
| 192 | return (size_b0 + size_b1); |
| 193 | } |
| 194 | |
| 195 | /*----------------------------------------------------------------------- |
| 196 | */ |
| 197 | static void flash_get_offsets (ulong base, flash_info_t *info) |
| 198 | { |
| 199 | int i; |
| 200 | |
| 201 | if (info->flash_id == FLASH_UNKNOWN) { |
| 202 | return; |
| 203 | } |
| 204 | |
| 205 | switch (info->flash_id & FLASH_VENDMASK) { |
| 206 | case FLASH_MAN_INTEL: |
| 207 | for (i = 0; i < info->sector_count; i++) { |
| 208 | info->start[i] = base; |
| 209 | base += 0x00020000; /* 128k per bank */ |
| 210 | } |
| 211 | return; |
| 212 | |
| 213 | default: |
| 214 | printf ("Don't know sector ofsets for flash type 0x%lx\n", info->flash_id); |
| 215 | return; |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | /*----------------------------------------------------------------------- |
| 220 | */ |
| 221 | void flash_print_info (flash_info_t *info) |
| 222 | { |
| 223 | int i; |
| 224 | |
| 225 | if (info->flash_id == FLASH_UNKNOWN) { |
| 226 | printf ("missing or unknown FLASH type\n"); |
| 227 | return; |
| 228 | } |
| 229 | |
| 230 | switch (info->flash_id & FLASH_VENDMASK) { |
| 231 | case FLASH_MAN_AMD: printf ("AMD "); break; |
| 232 | case FLASH_MAN_FUJ: printf ("Fujitsu "); break; |
| 233 | case FLASH_MAN_SST: printf ("SST "); break; |
| 234 | case FLASH_MAN_STM: printf ("STM "); break; |
| 235 | case FLASH_MAN_INTEL: printf ("Intel "); break; |
| 236 | case FLASH_MAN_MT: printf ("MT "); break; |
| 237 | default: printf ("Unknown Vendor "); break; |
| 238 | } |
| 239 | |
| 240 | switch (info->flash_id & FLASH_TYPEMASK) { |
| 241 | case FLASH_28F320J3A: printf ("28F320J3A (32Mbit = 128K x 32)\n"); |
| 242 | break; |
| 243 | case FLASH_28F640J3A: printf ("28F640J3A (64Mbit = 128K x 64)\n"); |
| 244 | break; |
| 245 | case FLASH_28F128J3A: printf ("28F128J3A (128Mbit = 128K x 128)\n"); |
| 246 | break; |
| 247 | default: printf ("Unknown Chip Type\n"); |
| 248 | break; |
| 249 | } |
| 250 | |
| 251 | if (info->size >= (1 << 20)) { |
| 252 | i = 20; |
| 253 | } else { |
| 254 | i = 10; |
| 255 | } |
| 256 | printf (" Size: %ld %cB in %d Sectors\n", |
| 257 | info->size >> i, |
| 258 | (i == 20) ? 'M' : 'k', |
| 259 | info->sector_count); |
| 260 | |
| 261 | printf (" Sector Start Addresses:"); |
| 262 | for (i=0; i<info->sector_count; ++i) { |
| 263 | if ((i % 5) == 0) |
| 264 | printf ("\n "); |
| 265 | printf (" %08lX%s", |
| 266 | info->start[i], |
| 267 | info->protect[i] ? " (RO)" : " " |
| 268 | ); |
| 269 | } |
| 270 | printf ("\n"); |
| 271 | return; |
| 272 | } |
| 273 | |
| 274 | /*----------------------------------------------------------------------- |
| 275 | */ |
| 276 | |
| 277 | |
| 278 | /*----------------------------------------------------------------------- |
| 279 | */ |
| 280 | |
| 281 | /* |
| 282 | * The following code cannot be run from FLASH! |
| 283 | */ |
| 284 | static ulong flash_get_size (vu_char *addr, flash_info_t *info) |
| 285 | { |
| 286 | vu_char manuf, device; |
| 287 | |
| 288 | addr[0] = BS(0x90); |
| 289 | manuf = BS(addr[0]); |
| 290 | DEBUGF("Manuf. ID @ 0x%08lx: 0x%08x\n", (vu_char *)addr, manuf); |
| 291 | |
| 292 | switch (manuf) { |
| 293 | case BYTEME(AMD_MANUFACT): |
| 294 | info->flash_id = FLASH_MAN_AMD; |
| 295 | break; |
| 296 | case BYTEME(FUJ_MANUFACT): |
| 297 | info->flash_id = FLASH_MAN_FUJ; |
| 298 | break; |
| 299 | case BYTEME(SST_MANUFACT): |
| 300 | info->flash_id = FLASH_MAN_SST; |
| 301 | break; |
| 302 | case BYTEME(STM_MANUFACT): |
| 303 | info->flash_id = FLASH_MAN_STM; |
| 304 | break; |
| 305 | case BYTEME(INTEL_MANUFACT): |
| 306 | info->flash_id = FLASH_MAN_INTEL; |
| 307 | break; |
| 308 | default: |
| 309 | info->flash_id = FLASH_UNKNOWN; |
| 310 | info->sector_count = 0; |
| 311 | info->size = 0; |
| 312 | addr[0] = BS(0xFF); /* restore read mode, (yes, BS is a NOP) */ |
| 313 | return 0; /* no or unknown flash */ |
| 314 | } |
| 315 | |
| 316 | device = BS(addr[2]); /* device ID */ |
| 317 | |
| 318 | DEBUGF("Device ID @ 0x%08x: 0x%08x\n", (&addr[1]), device); |
| 319 | |
| 320 | switch (device) { |
| 321 | case BYTEME(INTEL_ID_28F320J3A): |
| 322 | info->flash_id += FLASH_28F320J3A; |
| 323 | info->sector_count = 32; |
| 324 | info->size = 0x00400000; |
| 325 | break; /* => 4 MB */ |
| 326 | |
| 327 | case BYTEME(INTEL_ID_28F640J3A): |
| 328 | info->flash_id += FLASH_28F640J3A; |
| 329 | info->sector_count = 64; |
| 330 | info->size = 0x00800000; |
| 331 | break; /* => 8 MB */ |
| 332 | |
| 333 | case BYTEME(INTEL_ID_28F128J3A): |
| 334 | info->flash_id += FLASH_28F128J3A; |
| 335 | info->sector_count = 128; |
| 336 | info->size = 0x01000000; |
| 337 | break; /* => 16 MB */ |
| 338 | |
| 339 | default: |
| 340 | info->flash_id = FLASH_UNKNOWN; |
| 341 | addr[0] = BS(0xFF); /* restore read mode (yes, a NOP) */ |
| 342 | return 0; /* => no or unknown flash */ |
| 343 | |
| 344 | } |
| 345 | |
| 346 | if (info->sector_count > CFG_MAX_FLASH_SECT) { |
| 347 | printf ("** ERROR: sector count %d > max (%d) **\n", |
| 348 | info->sector_count, CFG_MAX_FLASH_SECT); |
| 349 | info->sector_count = CFG_MAX_FLASH_SECT; |
| 350 | } |
| 351 | |
| 352 | addr[0] = BS(0xFF); /* restore read mode */ |
| 353 | |
| 354 | return (info->size); |
| 355 | } |
| 356 | |
| 357 | |
| 358 | /*----------------------------------------------------------------------- |
| 359 | */ |
| 360 | |
| 361 | int flash_erase (flash_info_t *info, int s_first, int s_last) |
| 362 | { |
| 363 | int flag, prot, sect; |
| 364 | ulong start, now, last; |
| 365 | |
| 366 | if ((s_first < 0) || (s_first > s_last)) { |
| 367 | if (info->flash_id == FLASH_UNKNOWN) { |
| 368 | printf ("- missing\n"); |
| 369 | } else { |
| 370 | printf ("- no sectors to erase\n"); |
| 371 | } |
| 372 | return 1; |
| 373 | } |
| 374 | |
| 375 | if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL) { |
| 376 | printf ("Can erase only Intel flash types - aborted\n"); |
| 377 | return 1; |
| 378 | } |
| 379 | |
| 380 | prot = 0; |
| 381 | for (sect=s_first; sect<=s_last; ++sect) { |
| 382 | if (info->protect[sect]) { |
| 383 | prot++; |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | if (prot) { |
| 388 | printf ("- Warning: %d protected sectors will not be erased!\n", prot); |
| 389 | } else { |
| 390 | printf ("\n"); |
| 391 | } |
| 392 | |
| 393 | start = get_timer (0); |
| 394 | last = start; |
| 395 | /* Start erase on unprotected sectors */ |
| 396 | for (sect = s_first; sect<=s_last; sect++) { |
| 397 | if (info->protect[sect] == 0) { /* not protected */ |
| 398 | vu_char *addr = (vu_char *)(info->start[sect]); |
| 399 | unsigned long status; |
| 400 | |
| 401 | /* Disable interrupts which might cause a timeout here */ |
| 402 | flag = disable_interrupts(); |
| 403 | |
| 404 | *addr = BS(0x50); /* clear status register */ |
| 405 | *addr = BS(0x20); /* erase setup */ |
| 406 | *addr = BS(0xD0); /* erase confirm */ |
| 407 | |
| 408 | /* re-enable interrupts if necessary */ |
| 409 | if (flag) { |
| 410 | enable_interrupts(); |
| 411 | } |
| 412 | |
| 413 | /* wait at least 80us - let's wait 1 ms */ |
| 414 | udelay (1000); |
| 415 | |
| 416 | while (((status = BS(*addr)) & BYTEME(0x00800080)) != BYTEME(0x00800080)) { |
| 417 | if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) { |
| 418 | printf ("Timeout\n"); |
| 419 | *addr = BS(0xB0); /* suspend erase */ |
| 420 | *addr = BS(0xFF); /* reset to read mode */ |
| 421 | return 1; |
| 422 | } |
| 423 | |
| 424 | /* show that we're waiting */ |
| 425 | if ((now - last) > 1000) { /* every second */ |
| 426 | putc ('.'); |
| 427 | last = now; |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | *addr = BS(0xFF); /* reset to read mode */ |
| 432 | } |
| 433 | } |
| 434 | printf (" done\n"); |
| 435 | return 0; |
| 436 | } |
| 437 | |
| 438 | /*----------------------------------------------------------------------- |
| 439 | * Copy memory to flash, returns: |
| 440 | * 0 - OK |
| 441 | * 1 - write timeout |
| 442 | * 2 - Flash not erased |
| 443 | * 4 - Flash not identified |
| 444 | */ |
| 445 | |
| 446 | #define FLASH_WIDTH 1 /* flash bus width in bytes */ |
| 447 | |
| 448 | int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) |
| 449 | { |
| 450 | uchar *wp = (uchar *)addr; |
| 451 | int rc; |
| 452 | |
| 453 | if (info->flash_id == FLASH_UNKNOWN) { |
| 454 | return 4; |
| 455 | } |
| 456 | |
| 457 | while (cnt > 0) { |
| 458 | if ((rc = write_data(info, wp, *src)) != 0) { |
| 459 | return rc; |
| 460 | } |
| 461 | wp++; |
| 462 | src++; |
| 463 | cnt--; |
| 464 | } |
| 465 | |
| 466 | return cnt; |
| 467 | } |
| 468 | |
| 469 | /*----------------------------------------------------------------------- |
| 470 | * Write a word to Flash, returns: |
| 471 | * 0 - OK |
| 472 | * 1 - write timeout |
| 473 | * 2 - Flash not erased |
| 474 | */ |
| 475 | static int write_data (flash_info_t *info, uchar *dest, uchar data) |
| 476 | { |
| 477 | vu_char *addr = (vu_char *)dest; |
| 478 | ulong status; |
| 479 | ulong start; |
| 480 | int flag; |
| 481 | |
| 482 | /* Check if Flash is (sufficiently) erased */ |
| 483 | if ((BS(*addr) & data) != data) { |
| 484 | return 2; |
| 485 | } |
| 486 | /* Disable interrupts which might cause a timeout here */ |
| 487 | flag = disable_interrupts(); |
| 488 | |
| 489 | *addr = BS(0x40); /* write setup */ |
| 490 | *addr = data; |
| 491 | |
| 492 | /* re-enable interrupts if necessary */ |
| 493 | if (flag) { |
| 494 | enable_interrupts(); |
| 495 | } |
| 496 | |
| 497 | start = get_timer (0); |
| 498 | |
| 499 | while (((status = BS(*addr)) & BYTEME(0x00800080)) != BYTEME(0x00800080)) { |
| 500 | if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { |
| 501 | *addr = BS(0xFF); /* restore read mode */ |
| 502 | return 1; |
| 503 | } |
| 504 | } |
| 505 | |
| 506 | *addr = BS(0xFF); /* restore read mode */ |
| 507 | |
| 508 | return 0; |
| 509 | } |
| 510 | |
| 511 | /*----------------------------------------------------------------------- |
| 512 | */ |