wdenk | 5da7f2f | 2004-01-03 00:43:19 +0000 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2001 |
| 3 | * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc. |
| 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 | /* |
| 25 | * flash.c - flash support for the 512k, 8bit boot flash |
Wolfgang Denk | a1be476 | 2008-05-20 16:00:29 +0200 | [diff] [blame] | 26 | and the 8MB 32bit extra flash on the DB64360 |
wdenk | 5da7f2f | 2004-01-03 00:43:19 +0000 | [diff] [blame] | 27 | * most of this file was based on the existing U-Boot |
| 28 | * flash drivers. |
| 29 | * |
| 30 | * written or collected and sometimes rewritten by |
| 31 | * Ingo Assmus <ingo.assmus@keymile.com> |
| 32 | * |
| 33 | */ |
| 34 | |
| 35 | #include <common.h> |
| 36 | #include <mpc8xx.h> |
| 37 | #include "../include/mv_gen_reg.h" |
| 38 | #include "../include/memory.h" |
| 39 | #include "intel_flash.h" |
| 40 | |
| 41 | #define FLASH_ROM 0xFFFD /* unknown flash type */ |
| 42 | #define FLASH_RAM 0xFFFE /* unknown flash type */ |
| 43 | #define FLASH_MAN_UNKNOWN 0xFFFF0000 |
| 44 | |
| 45 | /* #define DEBUG */ |
| 46 | |
| 47 | /* Intel flash commands */ |
| 48 | int flash_erase_intel (flash_info_t * info, int s_first, int s_last); |
| 49 | int write_word_intel (bank_addr_t addr, bank_word_t value); |
| 50 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 51 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
wdenk | 5da7f2f | 2004-01-03 00:43:19 +0000 | [diff] [blame] | 52 | |
| 53 | /*----------------------------------------------------------------------- |
| 54 | * Functions |
| 55 | */ |
| 56 | static ulong flash_get_size (int portwidth, vu_long * addr, |
| 57 | flash_info_t * info); |
| 58 | static int write_word (flash_info_t * info, ulong dest, ulong data); |
| 59 | static void flash_get_offsets (ulong base, flash_info_t * info); |
| 60 | |
| 61 | /*----------------------------------------------------------------------- |
| 62 | */ |
| 63 | |
| 64 | unsigned long flash_init (void) |
| 65 | { |
| 66 | unsigned int i; |
| 67 | unsigned long size_b0 = 0, size_b1 = 0; |
| 68 | unsigned long base, flash_size; |
| 69 | |
| 70 | /* Init: no FLASHes known */ |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 71 | for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) { |
wdenk | 5da7f2f | 2004-01-03 00:43:19 +0000 | [diff] [blame] | 72 | flash_info[i].flash_id = FLASH_UNKNOWN; |
| 73 | } |
| 74 | |
| 75 | /* the boot flash */ |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 76 | base = CONFIG_SYS_FLASH_BASE; |
wdenk | 5da7f2f | 2004-01-03 00:43:19 +0000 | [diff] [blame] | 77 | size_b0 = |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 78 | flash_get_size (CONFIG_SYS_BOOT_FLASH_WIDTH, (vu_long *) base, |
wdenk | 5da7f2f | 2004-01-03 00:43:19 +0000 | [diff] [blame] | 79 | &flash_info[0]); |
| 80 | |
| 81 | printf ("[%ldkB@%lx] ", size_b0 / 1024, base); |
| 82 | |
| 83 | if (flash_info[0].flash_id == FLASH_UNKNOWN) { |
| 84 | printf ("## Unknown FLASH at %08lx: Size = 0x%08lx = %ld MB\n", base, size_b0, size_b0 << 20); |
| 85 | } |
| 86 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 87 | base = memoryGetDeviceBaseAddress (CONFIG_SYS_EXTRA_FLASH_DEVICE); |
wdenk | 5da7f2f | 2004-01-03 00:43:19 +0000 | [diff] [blame] | 88 | /* base = memoryGetDeviceBaseAddress(DEV_CS3_BASE_ADDR);*/ |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 89 | for (i = 1; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) { |
wdenk | 5da7f2f | 2004-01-03 00:43:19 +0000 | [diff] [blame] | 90 | unsigned long size = |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 91 | flash_get_size (CONFIG_SYS_EXTRA_FLASH_WIDTH, |
wdenk | 5da7f2f | 2004-01-03 00:43:19 +0000 | [diff] [blame] | 92 | (vu_long *) base, &flash_info[i]); |
| 93 | |
| 94 | printf ("[%ldMB@%lx] ", size >> 20, base); |
| 95 | |
| 96 | if (flash_info[i].flash_id == FLASH_UNKNOWN) { |
| 97 | if (i == 1) { |
| 98 | printf ("## Unknown FLASH at %08lx: Size = 0x%08lx = %ld MB\n", base, size_b1, size_b1 << 20); |
| 99 | } |
| 100 | break; |
| 101 | } |
| 102 | size_b1 += size; |
| 103 | base += size; |
| 104 | } |
| 105 | |
| 106 | flash_size = size_b0 + size_b1; |
| 107 | return flash_size; |
| 108 | } |
| 109 | |
| 110 | /*----------------------------------------------------------------------- |
| 111 | */ |
| 112 | static void flash_get_offsets (ulong base, flash_info_t * info) |
| 113 | { |
| 114 | int i; |
| 115 | int sector_size; |
| 116 | |
| 117 | if (!info->sector_count) |
| 118 | return; |
| 119 | |
| 120 | /* set up sector start address table */ |
| 121 | switch (info->flash_id & FLASH_TYPEMASK) { |
| 122 | case FLASH_AM040: |
| 123 | case FLASH_28F128J3A: |
| 124 | case FLASH_28F640J3A: |
| 125 | case FLASH_RAM: |
| 126 | /* this chip has uniformly spaced sectors */ |
| 127 | sector_size = info->size / info->sector_count; |
| 128 | for (i = 0; i < info->sector_count; i++) |
| 129 | info->start[i] = base + (i * sector_size); |
| 130 | break; |
| 131 | default: |
| 132 | if (info->flash_id & FLASH_BTYPE) { |
| 133 | /* set sector offsets for bottom boot block type */ |
| 134 | info->start[0] = base + 0x00000000; |
| 135 | info->start[1] = base + 0x00008000; |
| 136 | info->start[2] = base + 0x0000C000; |
| 137 | info->start[3] = base + 0x00010000; |
| 138 | for (i = 4; i < info->sector_count; i++) { |
| 139 | info->start[i] = |
| 140 | base + (i * 0x00020000) - 0x00060000; |
| 141 | } |
| 142 | } else { |
| 143 | /* set sector offsets for top boot block type */ |
| 144 | i = info->sector_count - 1; |
| 145 | info->start[i--] = base + info->size - 0x00008000; |
| 146 | info->start[i--] = base + info->size - 0x0000C000; |
| 147 | info->start[i--] = base + info->size - 0x00010000; |
| 148 | for (; i >= 0; i--) { |
| 149 | info->start[i] = base + i * 0x00020000; |
| 150 | } |
| 151 | } |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | /*----------------------------------------------------------------------- |
| 156 | */ |
| 157 | void flash_print_info (flash_info_t * info) |
| 158 | { |
| 159 | int i; |
| 160 | |
| 161 | if (info->flash_id == FLASH_UNKNOWN) { |
| 162 | printf ("missing or unknown FLASH type\n"); |
| 163 | return; |
| 164 | } |
| 165 | |
| 166 | switch (info->flash_id & FLASH_VENDMASK) { |
| 167 | case FLASH_MAN_STM: |
| 168 | printf ("STM "); |
| 169 | break; |
| 170 | case FLASH_MAN_AMD: |
| 171 | printf ("AMD "); |
| 172 | break; |
| 173 | case FLASH_MAN_FUJ: |
| 174 | printf ("FUJITSU "); |
| 175 | break; |
| 176 | case FLASH_MAN_INTEL: |
| 177 | printf ("INTEL "); |
| 178 | break; |
| 179 | default: |
| 180 | printf ("Unknown Vendor "); |
| 181 | break; |
| 182 | } |
| 183 | |
| 184 | switch (info->flash_id & FLASH_TYPEMASK) { |
| 185 | case FLASH_AM040: |
| 186 | printf ("AM29LV040B (4 Mbit, bottom boot sect)\n"); |
| 187 | break; |
| 188 | case FLASH_AM400B: |
| 189 | printf ("AM29LV400B (4 Mbit, bottom boot sect)\n"); |
| 190 | break; |
| 191 | case FLASH_AM400T: |
| 192 | printf ("AM29LV400T (4 Mbit, top boot sector)\n"); |
| 193 | break; |
| 194 | case FLASH_AM800B: |
| 195 | printf ("AM29LV800B (8 Mbit, bottom boot sect)\n"); |
| 196 | break; |
| 197 | case FLASH_AM800T: |
| 198 | printf ("AM29LV800T (8 Mbit, top boot sector)\n"); |
| 199 | break; |
| 200 | case FLASH_AM160B: |
| 201 | printf ("AM29LV160B (16 Mbit, bottom boot sect)\n"); |
| 202 | break; |
| 203 | case FLASH_AM160T: |
| 204 | printf ("AM29LV160T (16 Mbit, top boot sector)\n"); |
| 205 | break; |
| 206 | case FLASH_AM320B: |
| 207 | printf ("AM29LV320B (32 Mbit, bottom boot sect)\n"); |
| 208 | break; |
| 209 | case FLASH_AM320T: |
| 210 | printf ("AM29LV320T (32 Mbit, top boot sector)\n"); |
| 211 | break; |
| 212 | case FLASH_28F640J3A: |
| 213 | printf ("28F640J3A (64 Mbit)\n"); |
| 214 | break; |
| 215 | case FLASH_28F128J3A: |
| 216 | printf ("28F128J3A (128 Mbit)\n"); |
| 217 | break; |
| 218 | case FLASH_ROM: |
| 219 | printf ("ROM\n"); |
| 220 | break; |
| 221 | case FLASH_RAM: |
| 222 | printf ("RAM\n"); |
| 223 | break; |
| 224 | default: |
| 225 | printf ("Unknown Chip Type\n"); |
| 226 | break; |
| 227 | } |
| 228 | |
| 229 | if ((info->size >> 20) > 0) { |
| 230 | printf (" Size: %ld MB in %d Sectors\n", |
| 231 | info->size >> 20, info->sector_count); |
| 232 | } else { |
| 233 | printf (" Size: %ld kB in %d Sectors\n", |
| 234 | info->size >> 10, info->sector_count); |
| 235 | } |
| 236 | |
| 237 | printf (" Sector Start Addresses:"); |
| 238 | for (i = 0; i < info->sector_count; ++i) { |
| 239 | if ((i % 5) == 0) |
| 240 | printf ("\n "); |
| 241 | printf (" %08lX%s", |
| 242 | info->start[i], info->protect[i] ? " (RO)" : " "); |
| 243 | } |
| 244 | printf ("\n"); |
| 245 | return; |
| 246 | } |
| 247 | |
| 248 | /*----------------------------------------------------------------------- |
| 249 | */ |
| 250 | |
| 251 | |
| 252 | /*----------------------------------------------------------------------- |
| 253 | */ |
| 254 | |
| 255 | /* |
| 256 | * The following code cannot be run from FLASH! |
| 257 | */ |
| 258 | |
| 259 | static inline void flash_cmd (int width, volatile unsigned char *addr, |
| 260 | int offset, unsigned char cmd) |
| 261 | { |
| 262 | /* supports 1x8, 1x16, and 2x16 */ |
| 263 | /* 2x8 and 4x8 are not supported */ |
| 264 | if (width == 4) { |
| 265 | /* assuming chips are in 16 bit mode */ |
| 266 | /* 2x16 */ |
| 267 | unsigned long cmd32 = (cmd << 16) | cmd; |
| 268 | |
| 269 | *(volatile unsigned long *) (addr + offset * 2) = cmd32; |
| 270 | } else { |
| 271 | /* 1x16 or 1x8 */ |
| 272 | *(volatile unsigned char *) (addr + offset) = cmd; |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | static ulong |
| 277 | flash_get_size (int portwidth, vu_long * addr, flash_info_t * info) |
| 278 | { |
| 279 | short i; |
| 280 | volatile unsigned char *caddr = (unsigned char *) addr; |
| 281 | volatile unsigned short *saddr = (unsigned short *) addr; |
| 282 | volatile unsigned long *laddr = (unsigned long *) addr; |
| 283 | char old[2], save; |
| 284 | ulong id = 0, manu = 0, base = (ulong) addr; |
| 285 | |
| 286 | #ifdef DEBUG |
| 287 | printf ("%s: enter\n", __FUNCTION__); |
| 288 | #endif |
| 289 | info->portwidth = portwidth; |
| 290 | |
| 291 | save = *caddr; |
| 292 | |
| 293 | flash_cmd (portwidth, caddr, 0, 0xf0); |
| 294 | flash_cmd (portwidth, caddr, 0, 0xf0); |
| 295 | |
| 296 | udelay (10); |
| 297 | |
| 298 | old[0] = caddr[0]; |
| 299 | old[1] = caddr[1]; |
| 300 | |
| 301 | |
| 302 | if (old[0] != 0xf0) { |
| 303 | flash_cmd (portwidth, caddr, 0, 0xf0); |
| 304 | flash_cmd (portwidth, caddr, 0, 0xf0); |
| 305 | |
| 306 | udelay (10); |
| 307 | |
| 308 | if (*caddr == 0xf0) { |
| 309 | /* this area is ROM */ |
| 310 | *caddr = save; |
| 311 | info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN; |
| 312 | info->sector_count = 8; |
| 313 | info->size = 0x80000; |
| 314 | flash_get_offsets (base, info); |
| 315 | return info->size; |
| 316 | } |
| 317 | } else { |
| 318 | *caddr = 0; |
| 319 | |
| 320 | udelay (10); |
| 321 | |
| 322 | if (*caddr == 0) { |
| 323 | /* this area is RAM */ |
| 324 | *caddr = save; |
| 325 | info->flash_id = FLASH_RAM + FLASH_MAN_UNKNOWN; |
| 326 | info->sector_count = 8; |
| 327 | info->size = 0x80000; |
| 328 | flash_get_offsets (base, info); |
| 329 | return info->size; |
| 330 | } |
| 331 | flash_cmd (portwidth, caddr, 0, 0xf0); |
| 332 | |
| 333 | udelay (10); |
| 334 | } |
| 335 | |
| 336 | /* Write auto select command: read Manufacturer ID */ |
| 337 | flash_cmd (portwidth, caddr, 0x555, 0xAA); |
| 338 | flash_cmd (portwidth, caddr, 0x2AA, 0x55); |
| 339 | flash_cmd (portwidth, caddr, 0x555, 0x90); |
| 340 | |
| 341 | udelay (10); |
| 342 | |
| 343 | if ((caddr[0] == old[0]) && (caddr[1] == old[1])) { |
| 344 | |
| 345 | /* this area is ROM */ |
| 346 | info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN; |
| 347 | info->sector_count = 8; |
| 348 | info->size = 0x80000; |
| 349 | flash_get_offsets (base, info); |
| 350 | return info->size; |
| 351 | #ifdef DEBUG |
| 352 | } else { |
| 353 | printf ("%px%d: %02x:%02x -> %02x:%02x\n", |
| 354 | caddr, portwidth, old[0], old[1], caddr[0], caddr[1]); |
| 355 | #endif |
| 356 | } |
| 357 | |
| 358 | switch (portwidth) { |
| 359 | case 1: |
| 360 | manu = caddr[0]; |
| 361 | manu |= manu << 16; |
| 362 | id = caddr[1]; |
| 363 | break; |
| 364 | case 2: |
| 365 | manu = saddr[0]; |
| 366 | manu |= manu << 16; |
| 367 | id = saddr[1]; |
| 368 | id |= id << 16; |
| 369 | break; |
| 370 | case 4: |
| 371 | manu = laddr[0]; |
| 372 | id = laddr[1]; |
| 373 | break; |
| 374 | } |
| 375 | |
| 376 | #ifdef DEBUG |
| 377 | flash_cmd (portwidth, caddr, 0, 0xf0); |
| 378 | |
| 379 | printf ("\n%08lx:%08lx:%08lx\n", base, manu, id); |
| 380 | printf ("%08lx %08lx %08lx %08lx\n", |
| 381 | laddr[0], laddr[1], laddr[2], laddr[3]); |
| 382 | #endif |
| 383 | |
| 384 | switch (manu) { |
| 385 | case STM_MANUFACT: |
| 386 | info->flash_id = FLASH_MAN_STM; |
| 387 | break; |
| 388 | case AMD_MANUFACT: |
| 389 | info->flash_id = FLASH_MAN_AMD; |
| 390 | break; |
| 391 | case FUJ_MANUFACT: |
| 392 | info->flash_id = FLASH_MAN_FUJ; |
| 393 | break; |
| 394 | case INTEL_MANUFACT: |
| 395 | info->flash_id = FLASH_MAN_INTEL; |
| 396 | break; |
| 397 | default: |
| 398 | flash_cmd (portwidth, caddr, 0, 0xf0); |
| 399 | |
| 400 | printf ("Unknown Mfr [%08lx]:%08lx\n", manu, id); |
| 401 | info->flash_id = FLASH_UNKNOWN; |
| 402 | info->sector_count = 0; |
| 403 | info->size = 0; |
| 404 | return (0); /* no or unknown flash */ |
| 405 | } |
| 406 | |
| 407 | switch (id) { |
| 408 | case AMD_ID_LV400T: |
| 409 | info->flash_id += FLASH_AM400T; |
| 410 | info->sector_count = 11; |
| 411 | info->size = 0x00100000; |
| 412 | info->chipwidth = 1; |
| 413 | break; /* => 1 MB */ |
| 414 | |
| 415 | case AMD_ID_LV400B: |
| 416 | info->flash_id += FLASH_AM400B; |
| 417 | info->sector_count = 11; |
| 418 | info->size = 0x00100000; |
| 419 | info->chipwidth = 1; |
| 420 | break; /* => 1 MB */ |
| 421 | |
| 422 | case AMD_ID_LV800T: |
| 423 | info->flash_id += FLASH_AM800T; |
| 424 | info->sector_count = 19; |
| 425 | info->size = 0x00200000; |
| 426 | info->chipwidth = 1; |
| 427 | break; /* => 2 MB */ |
| 428 | |
| 429 | case AMD_ID_LV800B: |
| 430 | info->flash_id += FLASH_AM800B; |
| 431 | info->sector_count = 19; |
| 432 | info->size = 0x00200000; |
| 433 | info->chipwidth = 1; |
| 434 | break; /* => 2 MB */ |
| 435 | |
| 436 | case AMD_ID_LV160T: |
| 437 | info->flash_id += FLASH_AM160T; |
| 438 | info->sector_count = 35; |
| 439 | info->size = 0x00400000; |
| 440 | info->chipwidth = 1; |
| 441 | break; /* => 4 MB */ |
| 442 | |
| 443 | case AMD_ID_LV160B: |
| 444 | info->flash_id += FLASH_AM160B; |
| 445 | info->sector_count = 35; |
| 446 | info->size = 0x00400000; |
| 447 | info->chipwidth = 1; |
| 448 | break; /* => 4 MB */ |
| 449 | #if 0 /* enable when device IDs are available */ |
| 450 | case AMD_ID_LV320T: |
| 451 | info->flash_id += FLASH_AM320T; |
| 452 | info->sector_count = 67; |
| 453 | info->size = 0x00800000; |
| 454 | break; /* => 8 MB */ |
| 455 | |
| 456 | case AMD_ID_LV320B: |
| 457 | info->flash_id += FLASH_AM320B; |
| 458 | info->sector_count = 67; |
| 459 | info->size = 0x00800000; |
| 460 | break; /* => 8 MB */ |
| 461 | #endif |
| 462 | case AMD_ID_LV040B: |
| 463 | info->flash_id += FLASH_AM040; |
| 464 | info->sector_count = 8; |
| 465 | info->size = 0x80000; |
| 466 | info->chipwidth = 1; |
| 467 | break; /* => 512 kB */ |
| 468 | |
| 469 | case INTEL_ID_28F640J3A: |
| 470 | info->flash_id += FLASH_28F640J3A; |
| 471 | info->sector_count = 64; |
| 472 | info->size = 128 * 1024 * 64; /* 128kbytes x 64 blocks */ |
| 473 | info->chipwidth = 2; |
| 474 | if (portwidth == 4) |
| 475 | info->size *= 2; /* 2x16 */ |
| 476 | break; |
| 477 | |
| 478 | case INTEL_ID_28F128J3A: |
| 479 | info->flash_id += FLASH_28F128J3A; |
| 480 | info->sector_count = 128; |
| 481 | info->size = 128 * 1024 * 128; /* 128kbytes x 128 blocks */ |
| 482 | info->chipwidth = 2; |
| 483 | if (portwidth == 4) |
| 484 | info->size *= 2; /* 2x16 */ |
| 485 | break; |
| 486 | |
| 487 | default: |
| 488 | flash_cmd (portwidth, caddr, 0, 0xf0); |
| 489 | |
| 490 | printf ("Unknown id %lx:[%lx]\n", manu, id); |
| 491 | info->flash_id = FLASH_UNKNOWN; |
| 492 | info->chipwidth = 1; |
| 493 | return (0); /* => no or unknown flash */ |
| 494 | |
| 495 | } |
| 496 | |
| 497 | flash_get_offsets (base, info); |
| 498 | |
| 499 | |
| 500 | /* check for protected sectors */ |
| 501 | for (i = 0; i < info->sector_count; i++) { |
| 502 | /* read sector protection at sector address, (A7 .. A0)=0x02 */ |
| 503 | /* D0 = 1 if protected */ |
| 504 | caddr = (volatile unsigned char *) (info->start[i]); |
| 505 | saddr = (volatile unsigned short *) (info->start[i]); |
| 506 | laddr = (volatile unsigned long *) (info->start[i]); |
| 507 | if (portwidth == 1) |
| 508 | info->protect[i] = caddr[2] & 1; |
| 509 | else if (portwidth == 2) |
| 510 | info->protect[i] = saddr[2] & 1; |
| 511 | else |
| 512 | info->protect[i] = laddr[2] & 1; |
| 513 | } |
| 514 | |
| 515 | /* |
| 516 | * Prevent writes to uninitialized FLASH. |
| 517 | */ |
| 518 | if (info->flash_id != FLASH_UNKNOWN) { |
| 519 | caddr = (volatile unsigned char *) info->start[0]; |
| 520 | |
| 521 | flash_cmd (portwidth, caddr, 0, 0xF0); /* reset bank */ |
| 522 | } |
| 523 | |
| 524 | return (info->size); |
| 525 | } |
| 526 | |
| 527 | int flash_erase (flash_info_t * info, int s_first, int s_last) |
| 528 | { |
Wolfgang Denk | 7fb5266 | 2005-10-13 16:45:02 +0200 | [diff] [blame] | 529 | volatile unsigned char *addr = (uchar *) (info->start[0]); |
wdenk | 5da7f2f | 2004-01-03 00:43:19 +0000 | [diff] [blame] | 530 | int flag, prot, sect, l_sect; |
| 531 | ulong start, now, last; |
| 532 | |
| 533 | /* modified to support 2x16 Intel flash */ |
| 534 | /* Note that the code will not exit on a flash erasure error or timeout */ |
| 535 | /* but will print and error message and continue processing sectors */ |
| 536 | /* until they are all erased. */ |
| 537 | /* 10-16-2002 P. Marchese */ |
| 538 | ulong mask; |
| 539 | int timeout; |
| 540 | |
| 541 | if (info->portwidth == 4) |
| 542 | /* { |
| 543 | printf ("- Warning: erasing of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n"); |
| 544 | return 1; |
| 545 | }*/ |
| 546 | { |
| 547 | /* make sure it's Intel flash */ |
| 548 | if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) { |
| 549 | /* yup! it's an Intel flash */ |
| 550 | /* is it 16-bits wide? */ |
| 551 | if (info->chipwidth == 2) { |
| 552 | /* yup! it's 16-bits wide */ |
| 553 | /* are there any sectors to process? */ |
| 554 | if ((s_first < 0) || (s_first > s_last)) { |
| 555 | printf ("Error: There are no sectors to erase\n"); |
| 556 | printf ("Either sector %d is less than zero\n", s_first); |
| 557 | printf ("or sector %d is greater than sector %d\n", s_first, s_last); |
| 558 | return 1; |
| 559 | } |
| 560 | /* check for protected sectors */ |
| 561 | prot = 0; |
| 562 | for (sect = s_first; sect <= s_last; ++sect) |
| 563 | if (info->protect[sect]) |
| 564 | prot++; |
| 565 | /* if variable "prot" is nonzero, there are protected sectors */ |
| 566 | if (prot) |
| 567 | printf ("- Warning: %d protected sectors will not be erased!\n", prot); |
| 568 | /* reset the flash */ |
| 569 | flash_cmd (info->portwidth, addr, 0, |
| 570 | CHIP_CMD_RST); |
| 571 | /* Disable interrupts which might cause a timeout here */ |
| 572 | flag = disable_interrupts (); |
| 573 | /* Clear the status register */ |
| 574 | flash_cmd (info->portwidth, addr, 0, |
| 575 | CHIP_CMD_CLR_STAT); |
| 576 | flash_cmd (info->portwidth, addr, 0, |
| 577 | CHIP_CMD_RST); |
| 578 | /* Start erase on unprotected sectors */ |
| 579 | for (sect = s_first; sect <= s_last; sect++) { |
| 580 | /* is the sector unprotected? */ |
| 581 | if (info->protect[sect] == 0) { /* not protected */ |
| 582 | /* issue the single block erase command, 0x20 */ |
| 583 | flash_cmd (info->portwidth, |
| 584 | (volatile unsigned |
| 585 | char *) info-> |
| 586 | start[sect], 0, |
| 587 | CHIP_CMD_ERASE1); |
| 588 | /* issue the erase confirm command, 0xD0 */ |
| 589 | flash_cmd (info->portwidth, |
| 590 | (volatile unsigned |
| 591 | char *) info-> |
| 592 | start[sect], 0, |
| 593 | CHIP_CMD_ERASE2); |
| 594 | l_sect = sect; |
| 595 | /* re-enable interrupts if necessary */ |
| 596 | if (flag) |
| 597 | enable_interrupts (); |
| 598 | /* poll for erasure completion */ |
| 599 | /* put flash into read status mode by writing 0x70 to it */ |
| 600 | flash_cmd (info->portwidth, |
| 601 | addr, 0, |
| 602 | CHIP_CMD_RD_STAT); |
| 603 | /* setup the status register mask */ |
| 604 | mask = CHIP_STAT_RDY | |
| 605 | (CHIP_STAT_RDY << 16); |
| 606 | /* init. the timeout counter */ |
| 607 | start = get_timer (0); |
| 608 | /* keep looping while the flash is not ready */ |
| 609 | /* exit the loop by timing out or the flash */ |
| 610 | /* becomes ready again */ |
| 611 | timeout = 0; |
| 612 | while ((* |
| 613 | (volatile unsigned |
| 614 | long *) info-> |
| 615 | start[sect] & mask) != |
| 616 | mask) { |
| 617 | /* has the timeout limit been reached? */ |
| 618 | if (get_timer (start) |
| 619 | > |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 620 | CONFIG_SYS_FLASH_ERASE_TOUT) |
wdenk | 5da7f2f | 2004-01-03 00:43:19 +0000 | [diff] [blame] | 621 | { |
| 622 | /* timeout limit reached */ |
| 623 | printf ("Time out limit reached erasing sector at address %08lx\n", info->start[sect]); |
| 624 | printf ("Continuing with next sector\n"); |
| 625 | timeout = 1; |
| 626 | goto timed_out_error; |
| 627 | } |
| 628 | /* put flash into read status mode by writing 0x70 to it */ |
| 629 | flash_cmd (info-> |
| 630 | portwidth, |
| 631 | addr, 0, |
| 632 | CHIP_CMD_RD_STAT); |
| 633 | } |
| 634 | /* did we timeout? */ |
| 635 | timed_out_error:if (timeout == 0) |
| 636 | { |
| 637 | /* didn't timeout, so check the status register */ |
| 638 | /* create the status mask to check for errors */ |
| 639 | mask = CHIP_STAT_ECLBS; |
| 640 | mask = mask | (mask << |
| 641 | 16); |
| 642 | /* put flash into read status mode by writing 0x70 to it */ |
| 643 | flash_cmd (info-> |
| 644 | portwidth, |
| 645 | addr, 0, |
| 646 | CHIP_CMD_RD_STAT); |
| 647 | /* are there any errors? */ |
| 648 | if ((* |
| 649 | (volatile |
| 650 | unsigned long *) |
| 651 | info-> |
| 652 | start[sect] & |
| 653 | mask) != 0) { |
| 654 | /* We got an erasure error */ |
| 655 | printf ("Flash erasure error at address 0x%08lx\n", info->start[sect]); |
| 656 | printf ("Continuing with next sector\n"); |
| 657 | /* reset the flash */ |
| 658 | flash_cmd |
| 659 | (info-> |
| 660 | portwidth, |
| 661 | addr, |
| 662 | 0, |
| 663 | CHIP_CMD_RST); |
| 664 | } |
| 665 | } |
| 666 | /* erasure completed without errors */ |
| 667 | /* reset the flash */ |
| 668 | flash_cmd (info->portwidth, |
| 669 | addr, 0, |
| 670 | CHIP_CMD_RST); |
| 671 | } /* end if not protected */ |
| 672 | } /* end for loop */ |
| 673 | printf ("Flash erasure done\n"); |
| 674 | return 0; |
| 675 | } else { |
| 676 | /* The Intel flash is not 16-bit wide */ |
| 677 | /* print and error message and return */ |
| 678 | /* NOTE: you can add routines here to handle other size flash */ |
| 679 | printf ("Error: Intel flash device is only %d-bits wide\n", info->chipwidth * 8); |
| 680 | printf ("The erasure code only handles Intel 16-bit wide flash memory\n"); |
| 681 | return 1; |
| 682 | } |
| 683 | } else { |
| 684 | /* Not Intel flash so return an error as a write timeout */ |
| 685 | /* NOTE: if it's another type flash, stick its routine here */ |
| 686 | printf ("Error: The flash device is not Intel type\n"); |
| 687 | printf ("The erasure code only supports Intel flash in a 32-bit port width\n"); |
| 688 | return 1; |
| 689 | } |
| 690 | } |
| 691 | |
| 692 | /* end 32-bit wide flash code */ |
| 693 | if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM) |
| 694 | return 1; /* Rom can not be erased */ |
| 695 | if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) { /* RAM just copy 0s to RAM */ |
| 696 | for (sect = s_first; sect <= s_last; sect++) { |
| 697 | int sector_size = info->size / info->sector_count; |
| 698 | |
Wolfgang Denk | 7fb5266 | 2005-10-13 16:45:02 +0200 | [diff] [blame] | 699 | addr = (uchar *) (info->start[sect]); |
wdenk | 5da7f2f | 2004-01-03 00:43:19 +0000 | [diff] [blame] | 700 | memset ((void *) addr, 0, sector_size); |
| 701 | } |
| 702 | return 0; |
| 703 | } |
| 704 | |
| 705 | if ((s_first < 0) || (s_first > s_last)) { |
| 706 | if (info->flash_id == FLASH_UNKNOWN) { |
| 707 | printf ("- missing\n"); |
| 708 | } else { |
| 709 | printf ("- no sectors to erase\n"); |
| 710 | } |
| 711 | return 1; |
| 712 | } |
| 713 | |
| 714 | if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) { /* Intel works spezial */ |
| 715 | return flash_erase_intel (info, |
| 716 | (unsigned short) s_first, |
| 717 | (unsigned short) s_last); |
| 718 | } |
| 719 | #if 0 |
| 720 | if ((info->flash_id == FLASH_UNKNOWN) || /* Flash is unknown to PPCBoot */ |
| 721 | (info->flash_id > FLASH_AMD_COMP)) { |
| 722 | printf ("Can't erase unknown flash type %08lx - aborted\n", |
| 723 | info->flash_id); |
| 724 | return 1; |
| 725 | } |
| 726 | #endif |
| 727 | |
| 728 | prot = 0; |
| 729 | for (sect = s_first; sect <= s_last; ++sect) { |
| 730 | if (info->protect[sect]) { |
| 731 | prot++; |
| 732 | } |
| 733 | } |
| 734 | |
| 735 | if (prot) { |
| 736 | printf ("- Warning: %d protected sectors will not be erased!\n", prot); |
| 737 | } else { |
| 738 | printf ("\n"); |
| 739 | } |
| 740 | |
| 741 | l_sect = -1; |
| 742 | |
| 743 | /* Disable interrupts which might cause a timeout here */ |
| 744 | flag = disable_interrupts (); |
| 745 | |
| 746 | flash_cmd (info->portwidth, addr, 0x555, 0xAA); /* start erase routine */ |
| 747 | flash_cmd (info->portwidth, addr, 0x2AA, 0x55); |
| 748 | flash_cmd (info->portwidth, addr, 0x555, 0x80); |
| 749 | flash_cmd (info->portwidth, addr, 0x555, 0xAA); |
| 750 | flash_cmd (info->portwidth, addr, 0x2AA, 0x55); |
| 751 | |
| 752 | /* Start erase on unprotected sectors */ |
| 753 | for (sect = s_first; sect <= s_last; sect++) { |
| 754 | if (info->protect[sect] == 0) { /* not protected */ |
Wolfgang Denk | 7fb5266 | 2005-10-13 16:45:02 +0200 | [diff] [blame] | 755 | addr = (uchar *) (info->start[sect]); |
wdenk | 5da7f2f | 2004-01-03 00:43:19 +0000 | [diff] [blame] | 756 | flash_cmd (info->portwidth, addr, 0, 0x30); |
| 757 | l_sect = sect; |
| 758 | } |
| 759 | } |
| 760 | |
| 761 | /* re-enable interrupts if necessary */ |
| 762 | if (flag) |
| 763 | enable_interrupts (); |
| 764 | |
| 765 | /* wait at least 80us - let's wait 1 ms */ |
| 766 | udelay (1000); |
| 767 | |
| 768 | /* |
| 769 | * We wait for the last triggered sector |
| 770 | */ |
| 771 | if (l_sect < 0) |
| 772 | goto DONE; |
| 773 | |
| 774 | start = get_timer (0); |
| 775 | last = start; |
| 776 | addr = (volatile unsigned char *) (info->start[l_sect]); |
| 777 | /* broken for 2x16: TODO */ |
| 778 | while ((addr[0] & 0x80) != 0x80) { |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 779 | if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) { |
wdenk | 5da7f2f | 2004-01-03 00:43:19 +0000 | [diff] [blame] | 780 | printf ("Timeout\n"); |
| 781 | return 1; |
| 782 | } |
| 783 | /* show that we're waiting */ |
| 784 | if ((now - last) > 1000) { /* every second */ |
| 785 | putc ('.'); |
| 786 | last = now; |
| 787 | } |
| 788 | } |
| 789 | |
| 790 | DONE: |
| 791 | /* reset to read mode */ |
| 792 | addr = (volatile unsigned char *) info->start[0]; |
| 793 | flash_cmd (info->portwidth, addr, 0, 0xf0); |
| 794 | flash_cmd (info->portwidth, addr, 0, 0xf0); |
| 795 | |
| 796 | printf (" done\n"); |
| 797 | return 0; |
| 798 | } |
| 799 | |
| 800 | /*----------------------------------------------------------------------- |
| 801 | * Copy memory to flash, returns: |
| 802 | * 0 - OK |
| 803 | * 1 - write timeout |
| 804 | * 2 - Flash not erased |
| 805 | */ |
| 806 | |
| 807 | /* broken for 2x16: TODO */ |
| 808 | int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) |
| 809 | { |
| 810 | ulong cp, wp, data; |
| 811 | int i, l, rc; |
| 812 | |
| 813 | /* Commented out since the below code should work for 32-bit(2x 16 flash) */ |
| 814 | /* 10-16-2002 P. Marchese */ |
| 815 | /* if(info->portwidth==4) return 1; */ |
| 816 | /* if(info->portwidth==4) { |
| 817 | printf ("- Warning: writting of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n"); |
| 818 | return 1; |
| 819 | }*/ |
| 820 | |
| 821 | if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM) |
| 822 | return 0; |
| 823 | if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) { |
| 824 | memcpy ((void *) addr, src, cnt); |
| 825 | return 0; |
| 826 | } |
| 827 | |
| 828 | wp = (addr & ~3); /* get lower word aligned address */ |
| 829 | |
| 830 | /* |
| 831 | * handle unaligned start bytes |
| 832 | */ |
| 833 | if ((l = addr - wp) != 0) { |
| 834 | data = 0; |
| 835 | for (i = 0, cp = wp; i < l; ++i, ++cp) { |
| 836 | data = (data << 8) | (*(uchar *) cp); |
| 837 | } |
| 838 | for (; i < 4 && cnt > 0; ++i) { |
| 839 | data = (data << 8) | *src++; |
| 840 | --cnt; |
| 841 | ++cp; |
| 842 | } |
| 843 | for (; cnt == 0 && i < 4; ++i, ++cp) { |
| 844 | data = (data << 8) | (*(uchar *) cp); |
| 845 | } |
| 846 | |
| 847 | if ((rc = write_word (info, wp, data)) != 0) { |
| 848 | return (rc); |
| 849 | } |
| 850 | wp += 4; |
| 851 | } |
| 852 | |
| 853 | /* |
| 854 | * handle word aligned part |
| 855 | */ |
| 856 | while (cnt >= 4) { |
| 857 | data = 0; |
| 858 | for (i = 0; i < 4; ++i) { |
| 859 | data = (data << 8) | *src++; |
| 860 | } |
| 861 | if ((rc = write_word (info, wp, data)) != 0) { |
| 862 | return (rc); |
| 863 | } |
| 864 | wp += 4; |
| 865 | cnt -= 4; |
| 866 | } |
| 867 | |
| 868 | if (cnt == 0) { |
| 869 | return (0); |
| 870 | } |
| 871 | |
| 872 | /* |
| 873 | * handle unaligned tail bytes |
| 874 | */ |
| 875 | data = 0; |
| 876 | for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) { |
| 877 | data = (data << 8) | *src++; |
| 878 | --cnt; |
| 879 | } |
| 880 | for (; i < 4; ++i, ++cp) { |
| 881 | data = (data << 8) | (*(uchar *) cp); |
| 882 | } |
| 883 | |
| 884 | return (write_word (info, wp, data)); |
| 885 | } |
| 886 | |
| 887 | /*----------------------------------------------------------------------- |
| 888 | * Write a word to Flash, returns: |
| 889 | * 0 - OK |
| 890 | * 1 - write timeout |
| 891 | * 2 - Flash not erased |
| 892 | */ |
| 893 | /* broken for 2x16: TODO */ |
| 894 | static int write_word (flash_info_t * info, ulong dest, ulong data) |
| 895 | { |
Wolfgang Denk | 7fb5266 | 2005-10-13 16:45:02 +0200 | [diff] [blame] | 896 | volatile unsigned char *addr = (uchar *) (info->start[0]); |
wdenk | 5da7f2f | 2004-01-03 00:43:19 +0000 | [diff] [blame] | 897 | ulong start; |
| 898 | int flag, i; |
| 899 | ulong mask; |
| 900 | |
| 901 | /* modified so that it handles 32-bit(2x16 Intel flash programming */ |
| 902 | /* 10-16-2002 P. Marchese */ |
| 903 | |
| 904 | if (info->portwidth == 4) |
| 905 | /* { |
| 906 | printf ("- Warning: writting of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n"); |
| 907 | return 1; |
| 908 | }*/ |
| 909 | { |
| 910 | /* make sure it's Intel flash */ |
| 911 | if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) { |
| 912 | /* yup! it's an Intel flash */ |
| 913 | /* is it 16-bits wide? */ |
| 914 | if (info->chipwidth == 2) { |
| 915 | /* yup! it's 16-bits wide */ |
| 916 | /* so we know how to program it */ |
| 917 | /* reset the flash */ |
| 918 | flash_cmd (info->portwidth, addr, 0, |
| 919 | CHIP_CMD_RST); |
| 920 | /* Disable interrupts which might cause a timeout here */ |
| 921 | flag = disable_interrupts (); |
| 922 | /* Clear the status register */ |
| 923 | flash_cmd (info->portwidth, addr, 0, |
| 924 | CHIP_CMD_CLR_STAT); |
| 925 | flash_cmd (info->portwidth, addr, 0, |
| 926 | CHIP_CMD_RST); |
| 927 | /* 1st cycle of word/byte program */ |
| 928 | /* write 0x40 to the location to program */ |
Wolfgang Denk | 7fb5266 | 2005-10-13 16:45:02 +0200 | [diff] [blame] | 929 | flash_cmd (info->portwidth, (uchar *) dest, 0, |
wdenk | 5da7f2f | 2004-01-03 00:43:19 +0000 | [diff] [blame] | 930 | CHIP_CMD_PROG); |
| 931 | /* 2nd cycle of word/byte program */ |
| 932 | /* write the data to the destination address */ |
| 933 | *(ulong *) dest = data; |
| 934 | /* re-enable interrupts if necessary */ |
| 935 | if (flag) |
| 936 | enable_interrupts (); |
| 937 | /* setup the status register mask */ |
| 938 | mask = CHIP_STAT_RDY | (CHIP_STAT_RDY << 16); |
| 939 | /* put flash into read status mode by writing 0x70 to it */ |
| 940 | flash_cmd (info->portwidth, addr, 0, |
| 941 | CHIP_CMD_RD_STAT); |
| 942 | /* init. the timeout counter */ |
| 943 | start = get_timer (0); |
| 944 | /* keep looping while the flash is not ready */ |
| 945 | /* exit the loop by timing out or the flash */ |
| 946 | /* becomes ready again */ |
| 947 | /* 11-13-2002 Paul Marchese */ |
| 948 | /* modified while loop conditional statement */ |
| 949 | /* because we were always timing out. */ |
| 950 | /* there is a type mismatch, "addr[0]" */ |
| 951 | /* returns a byte but "mask" is a 32-bit value */ |
| 952 | while ((*(volatile unsigned long *) info-> |
| 953 | start[0] & mask) != mask) |
| 954 | /* original code */ |
| 955 | /* while (addr[0] & mask) != mask) */ |
| 956 | { |
| 957 | /* has the timeout limit been reached? */ |
| 958 | if (get_timer (start) > |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 959 | CONFIG_SYS_FLASH_WRITE_TOUT) { |
wdenk | 5da7f2f | 2004-01-03 00:43:19 +0000 | [diff] [blame] | 960 | /* timeout limit reached */ |
| 961 | printf ("Time out limit reached programming address %08lx with data %08lx\n", dest, data); |
| 962 | /* reset the flash */ |
| 963 | flash_cmd (info->portwidth, |
| 964 | addr, 0, |
| 965 | CHIP_CMD_RST); |
| 966 | return (1); |
| 967 | } |
| 968 | /* put flash into read status mode by writing 0x70 to it */ |
| 969 | flash_cmd (info->portwidth, addr, 0, |
| 970 | CHIP_CMD_RD_STAT); |
| 971 | } |
| 972 | /* flash is ready, so check the status */ |
| 973 | /* create the status mask to check for errors */ |
| 974 | mask = CHIP_STAT_DPS | CHIP_STAT_VPPS | |
| 975 | CHIP_STAT_PSLBS; |
| 976 | mask = mask | (mask << 16); |
| 977 | /* put flash into read status mode by writing 0x70 to it */ |
| 978 | flash_cmd (info->portwidth, addr, 0, |
| 979 | CHIP_CMD_RD_STAT); |
| 980 | /* are there any errors? */ |
| 981 | if ((addr[0] & mask) != 0) { |
| 982 | /* We got a one of the following errors: */ |
| 983 | /* Voltage range, Device protect, or programming */ |
| 984 | /* return the error as a device timeout */ |
| 985 | /* put flash into read status mode by writing 0x70 to it */ |
| 986 | flash_cmd (info->portwidth, addr, 0, |
| 987 | CHIP_CMD_RD_STAT); |
| 988 | printf ("Flash programming error at address 0x%08lx\n", dest); |
| 989 | printf ("Flash status register contains 0x%08lx\n", (unsigned long) addr[0]); |
| 990 | /* reset the flash */ |
| 991 | flash_cmd (info->portwidth, addr, 0, |
| 992 | CHIP_CMD_RST); |
| 993 | return 1; |
| 994 | } |
| 995 | /* write completed without errors */ |
| 996 | /* reset the flash */ |
| 997 | flash_cmd (info->portwidth, addr, 0, |
| 998 | CHIP_CMD_RST); |
| 999 | return 0; |
| 1000 | } else { |
| 1001 | /* it's not 16-bits wide, so return an error as a write timeout */ |
| 1002 | /* NOTE: you can add routines here to handle other size flash */ |
| 1003 | printf ("Error: Intel flash device is only %d-bits wide\n", info->chipwidth * 8); |
| 1004 | printf ("The write code only handles Intel 16-bit wide flash memory\n"); |
| 1005 | return 1; |
| 1006 | } |
| 1007 | } else { |
| 1008 | /* not Intel flash so return an error as a write timeout */ |
| 1009 | /* NOTE: if it's another type flash, stick its routine here */ |
| 1010 | printf ("Error: The flash device is not Intel type\n"); |
| 1011 | printf ("The code only supports Intel flash in a 32-bit port width\n"); |
| 1012 | return 1; |
| 1013 | } |
| 1014 | } |
| 1015 | |
| 1016 | /* end of 32-bit flash code */ |
| 1017 | if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM) |
| 1018 | return 1; |
| 1019 | if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) { |
| 1020 | *(unsigned long *) dest = data; |
| 1021 | return 0; |
| 1022 | } |
| 1023 | if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) { |
| 1024 | unsigned short low = data & 0xffff; |
| 1025 | unsigned short hi = (data >> 16) & 0xffff; |
| 1026 | int ret = write_word_intel ((bank_addr_t) dest, hi); |
| 1027 | |
| 1028 | if (!ret) |
| 1029 | ret = write_word_intel ((bank_addr_t) (dest + 2), |
| 1030 | low); |
| 1031 | |
| 1032 | return ret; |
| 1033 | } |
| 1034 | |
| 1035 | /* Check if Flash is (sufficiently) erased */ |
| 1036 | if ((*((vu_long *) dest) & data) != data) { |
| 1037 | return (2); |
| 1038 | } |
| 1039 | /* Disable interrupts which might cause a timeout here */ |
| 1040 | flag = disable_interrupts (); |
| 1041 | |
| 1042 | /* first, perform an unlock bypass command to speed up flash writes */ |
| 1043 | addr[0x555] = 0xAA; |
| 1044 | addr[0x2AA] = 0x55; |
| 1045 | addr[0x555] = 0x20; |
| 1046 | |
| 1047 | /* write each byte out */ |
| 1048 | for (i = 0; i < 4; i++) { |
| 1049 | char *data_ch = (char *) &data; |
| 1050 | |
| 1051 | addr[0] = 0xA0; |
| 1052 | *(((char *) dest) + i) = data_ch[i]; |
| 1053 | udelay (10); /* XXX */ |
| 1054 | } |
| 1055 | |
| 1056 | /* we're done, now do an unlock bypass reset */ |
| 1057 | addr[0] = 0x90; |
| 1058 | addr[0] = 0x00; |
| 1059 | |
| 1060 | /* re-enable interrupts if necessary */ |
| 1061 | if (flag) |
| 1062 | enable_interrupts (); |
| 1063 | |
| 1064 | /* data polling for D7 */ |
| 1065 | start = get_timer (0); |
| 1066 | while ((*((vu_long *) dest) & 0x00800080) != (data & 0x00800080)) { |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 1067 | if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) { |
wdenk | 5da7f2f | 2004-01-03 00:43:19 +0000 | [diff] [blame] | 1068 | return (1); |
| 1069 | } |
| 1070 | } |
| 1071 | return (0); |
| 1072 | } |