Stefan Roese | 99200d2 | 2005-08-22 17:51:53 +0200 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2002 |
| 3 | * Brad Kemp, Seranoa Networks, Brad.Kemp@seranoa.com |
| 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 <asm/processor.h> |
| 26 | #include <asm/cache.h> |
| 27 | |
| 28 | #undef DEBUG_FLASH |
| 29 | /* |
| 30 | * This file implements a Common Flash Interface (CFI) driver for U-Boot. |
| 31 | * The width of the port and the width of the chips are determined at initialization. |
| 32 | * These widths are used to calculate the address for access CFI data structures. |
| 33 | * It has been tested on an Intel Strataflash implementation. |
| 34 | * |
| 35 | * References |
| 36 | * JEDEC Standard JESD68 - Common Flash Interface (CFI) |
| 37 | * JEDEC Standard JEP137-A Common Flash Interface (CFI) ID Codes |
| 38 | * Intel Application Note 646 Common Flash Interface (CFI) and Command Sets |
| 39 | * Intel 290667-008 3 Volt Intel StrataFlash Memory datasheet |
| 40 | * |
| 41 | * TODO |
| 42 | * Use Primary Extended Query table (PRI) and Alternate Algorithm Query Table (ALT) to determine if protection is available |
| 43 | * Add support for other command sets Use the PRI and ALT to determine command set |
| 44 | * Verify erase and program timeouts. |
| 45 | */ |
| 46 | |
| 47 | #define FLASH_CMD_CFI 0x98 |
| 48 | #define FLASH_CMD_READ_ID 0x90 |
| 49 | #define FLASH_CMD_RESET 0xff |
| 50 | #define FLASH_CMD_BLOCK_ERASE 0x20 |
| 51 | #define FLASH_CMD_ERASE_CONFIRM 0xD0 |
| 52 | #define FLASH_CMD_WRITE 0x40 |
| 53 | #define FLASH_CMD_PROTECT 0x60 |
| 54 | #define FLASH_CMD_PROTECT_SET 0x01 |
| 55 | #define FLASH_CMD_PROTECT_CLEAR 0xD0 |
| 56 | #define FLASH_CMD_CLEAR_STATUS 0x50 |
| 57 | #define FLASH_CMD_WRITE_TO_BUFFER 0xE8 |
| 58 | #define FLASH_CMD_WRITE_BUFFER_CONFIRM 0xD0 |
| 59 | |
| 60 | #define FLASH_STATUS_DONE 0x80 |
| 61 | #define FLASH_STATUS_ESS 0x40 |
| 62 | #define FLASH_STATUS_ECLBS 0x20 |
| 63 | #define FLASH_STATUS_PSLBS 0x10 |
| 64 | #define FLASH_STATUS_VPENS 0x08 |
| 65 | #define FLASH_STATUS_PSS 0x04 |
| 66 | #define FLASH_STATUS_DPS 0x02 |
| 67 | #define FLASH_STATUS_R 0x01 |
| 68 | #define FLASH_STATUS_PROTECT 0x01 |
| 69 | |
| 70 | #define FLASH_OFFSET_CFI 0x55 |
| 71 | #define FLASH_OFFSET_CFI_RESP 0x10 |
| 72 | #define FLASH_OFFSET_WTOUT 0x1F |
| 73 | #define FLASH_OFFSET_WBTOUT 0x20 |
| 74 | #define FLASH_OFFSET_ETOUT 0x21 |
| 75 | #define FLASH_OFFSET_CETOUT 0x22 |
| 76 | #define FLASH_OFFSET_WMAX_TOUT 0x23 |
| 77 | #define FLASH_OFFSET_WBMAX_TOUT 0x24 |
| 78 | #define FLASH_OFFSET_EMAX_TOUT 0x25 |
| 79 | #define FLASH_OFFSET_CEMAX_TOUT 0x26 |
| 80 | #define FLASH_OFFSET_SIZE 0x27 |
| 81 | #define FLASH_OFFSET_INTERFACE 0x28 |
| 82 | #define FLASH_OFFSET_BUFFER_SIZE 0x2A |
| 83 | #define FLASH_OFFSET_NUM_ERASE_REGIONS 0x2C |
| 84 | #define FLASH_OFFSET_ERASE_REGIONS 0x2D |
| 85 | #define FLASH_OFFSET_PROTECT 0x02 |
| 86 | #define FLASH_OFFSET_USER_PROTECTION 0x85 |
| 87 | #define FLASH_OFFSET_INTEL_PROTECTION 0x81 |
| 88 | |
| 89 | #define FLASH_MAN_CFI 0x01000000 |
| 90 | |
| 91 | typedef union { |
| 92 | unsigned char c; |
| 93 | unsigned short w; |
| 94 | unsigned long l; |
| 95 | } cfiword_t; |
| 96 | |
| 97 | typedef union { |
| 98 | unsigned char *cp; |
| 99 | unsigned short *wp; |
| 100 | unsigned long *lp; |
| 101 | } cfiptr_t; |
| 102 | |
| 103 | #define NUM_ERASE_REGIONS 4 |
| 104 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 105 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
Stefan Roese | 99200d2 | 2005-08-22 17:51:53 +0200 | [diff] [blame] | 106 | |
| 107 | /*----------------------------------------------------------------------- |
| 108 | * Functions |
| 109 | */ |
| 110 | |
| 111 | static void flash_add_byte(flash_info_t * info, cfiword_t * cword, uchar c); |
| 112 | static void flash_make_cmd(flash_info_t * info, uchar cmd, void *cmdbuf); |
| 113 | static void flash_write_cmd(flash_info_t * info, int sect, uchar offset, |
| 114 | uchar cmd); |
| 115 | static int flash_isequal(flash_info_t * info, int sect, uchar offset, |
| 116 | uchar cmd); |
| 117 | static int flash_isset(flash_info_t * info, int sect, uchar offset, uchar cmd); |
| 118 | static int flash_detect_cfi(flash_info_t * info); |
| 119 | static ulong flash_get_size(ulong base, int banknum); |
| 120 | static int flash_write_cfiword(flash_info_t * info, ulong dest, |
| 121 | cfiword_t cword); |
| 122 | static int flash_full_status_check(flash_info_t * info, ulong sector, |
| 123 | ulong tout, char *prompt); |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 124 | #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE |
Stefan Roese | 99200d2 | 2005-08-22 17:51:53 +0200 | [diff] [blame] | 125 | static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp, |
| 126 | int len); |
| 127 | #endif |
| 128 | /*----------------------------------------------------------------------- |
| 129 | * create an address based on the offset and the port width |
| 130 | */ |
| 131 | inline uchar *flash_make_addr(flash_info_t * info, int sect, int offset) |
| 132 | { |
| 133 | return ((uchar *) (info->start[sect] + (offset * info->portwidth))); |
| 134 | } |
| 135 | |
| 136 | /*----------------------------------------------------------------------- |
| 137 | * read a character at a port width address |
| 138 | */ |
| 139 | inline uchar flash_read_uchar(flash_info_t * info, uchar offset) |
| 140 | { |
| 141 | uchar *cp; |
| 142 | cp = flash_make_addr(info, 0, offset); |
| 143 | return (cp[info->portwidth - 1]); |
| 144 | } |
| 145 | |
| 146 | /*----------------------------------------------------------------------- |
| 147 | * read a short word by swapping for ppc format. |
| 148 | */ |
| 149 | ushort flash_read_ushort(flash_info_t * info, int sect, uchar offset) |
| 150 | { |
| 151 | uchar *addr; |
| 152 | |
| 153 | addr = flash_make_addr(info, sect, offset); |
| 154 | return ((addr[(2 * info->portwidth) - 1] << 8) | |
| 155 | addr[info->portwidth - 1]); |
| 156 | |
| 157 | } |
| 158 | |
| 159 | /*----------------------------------------------------------------------- |
| 160 | * read a long word by picking the least significant byte of each maiximum |
| 161 | * port size word. Swap for ppc format. |
| 162 | */ |
| 163 | ulong flash_read_long(flash_info_t * info, int sect, uchar offset) |
| 164 | { |
| 165 | uchar *addr; |
| 166 | |
| 167 | addr = flash_make_addr(info, sect, offset); |
| 168 | return ((addr[(2 * info->portwidth) - 1] << 24) | |
| 169 | (addr[(info->portwidth) - 1] << 16) | |
| 170 | (addr[(4 * info->portwidth) - 1] << 8) | |
| 171 | addr[(3 * info->portwidth) - 1]); |
| 172 | |
| 173 | } |
| 174 | |
| 175 | /*----------------------------------------------------------------------- |
| 176 | */ |
| 177 | unsigned long flash_init(void) |
| 178 | { |
| 179 | unsigned long size; |
| 180 | int i; |
| 181 | unsigned long address; |
| 182 | |
| 183 | /* The flash is positioned back to back, with the demultiplexing of the chip |
| 184 | * based on the A24 address line. |
| 185 | * |
| 186 | */ |
| 187 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 188 | address = CONFIG_SYS_FLASH_BASE; |
Stefan Roese | 99200d2 | 2005-08-22 17:51:53 +0200 | [diff] [blame] | 189 | size = 0; |
| 190 | |
| 191 | /* Init: no FLASHes known */ |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 192 | for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) { |
Stefan Roese | 99200d2 | 2005-08-22 17:51:53 +0200 | [diff] [blame] | 193 | flash_info[i].flash_id = FLASH_UNKNOWN; |
| 194 | size += flash_info[i].size = flash_get_size(address, i); |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 195 | address += CONFIG_SYS_FLASH_INCREMENT; |
Stefan Roese | 99200d2 | 2005-08-22 17:51:53 +0200 | [diff] [blame] | 196 | if (flash_info[i].flash_id == FLASH_UNKNOWN) { |
| 197 | printf |
| 198 | ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n", |
| 199 | i, flash_info[0].size, flash_info[i].size << 20); |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | #if 0 /* test-only */ |
| 204 | /* Monitor protection ON by default */ |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 205 | #if (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE) |
Stefan Roese | 99200d2 | 2005-08-22 17:51:53 +0200 | [diff] [blame] | 206 | for (i = 0; |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 207 | flash_info[0].start[i] < CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1; |
Stefan Roese | 99200d2 | 2005-08-22 17:51:53 +0200 | [diff] [blame] | 208 | i++) |
| 209 | (void)flash_real_protect(&flash_info[0], i, 1); |
| 210 | #endif |
| 211 | #endif |
| 212 | |
| 213 | return (size); |
| 214 | } |
| 215 | |
| 216 | /*----------------------------------------------------------------------- |
| 217 | */ |
| 218 | int flash_erase(flash_info_t * info, int s_first, int s_last) |
| 219 | { |
| 220 | int rcode = 0; |
| 221 | int prot; |
| 222 | int sect; |
| 223 | |
| 224 | if (info->flash_id != FLASH_MAN_CFI) { |
| 225 | printf("Can't erase unknown flash type - aborted\n"); |
| 226 | return 1; |
| 227 | } |
| 228 | if ((s_first < 0) || (s_first > s_last)) { |
| 229 | printf("- no sectors to erase\n"); |
| 230 | return 1; |
| 231 | } |
| 232 | |
| 233 | prot = 0; |
| 234 | for (sect = s_first; sect <= s_last; ++sect) { |
| 235 | if (info->protect[sect]) { |
| 236 | prot++; |
| 237 | } |
| 238 | } |
| 239 | if (prot) { |
| 240 | printf("- Warning: %d protected sectors will not be erased!\n", |
| 241 | prot); |
| 242 | } else { |
| 243 | printf("\n"); |
| 244 | } |
| 245 | |
| 246 | for (sect = s_first; sect <= s_last; sect++) { |
| 247 | if (info->protect[sect] == 0) { /* not protected */ |
| 248 | flash_write_cmd(info, sect, 0, FLASH_CMD_CLEAR_STATUS); |
| 249 | flash_write_cmd(info, sect, 0, FLASH_CMD_BLOCK_ERASE); |
| 250 | flash_write_cmd(info, sect, 0, FLASH_CMD_ERASE_CONFIRM); |
| 251 | |
| 252 | if (flash_full_status_check |
| 253 | (info, sect, info->erase_blk_tout, "erase")) { |
| 254 | rcode = 1; |
| 255 | } else |
| 256 | printf("."); |
| 257 | } |
| 258 | } |
| 259 | printf(" done\n"); |
| 260 | return rcode; |
| 261 | } |
| 262 | |
| 263 | /*----------------------------------------------------------------------- |
| 264 | */ |
| 265 | void flash_print_info(flash_info_t * info) |
| 266 | { |
| 267 | int i; |
| 268 | |
| 269 | if (info->flash_id != FLASH_MAN_CFI) { |
| 270 | printf("missing or unknown FLASH type\n"); |
| 271 | return; |
| 272 | } |
| 273 | |
| 274 | printf("CFI conformant FLASH (%d x %d)", |
| 275 | (info->portwidth << 3), (info->chipwidth << 3)); |
| 276 | printf(" Size: %ld MB in %d Sectors\n", |
| 277 | info->size >> 20, info->sector_count); |
| 278 | printf |
| 279 | (" Erase timeout %ld ms, write timeout %ld ms, buffer write timeout %ld ms, buffer size %d\n", |
| 280 | info->erase_blk_tout, info->write_tout, info->buffer_write_tout, |
| 281 | info->buffer_size); |
| 282 | |
| 283 | printf(" Sector Start Addresses:"); |
| 284 | for (i = 0; i < info->sector_count; ++i) { |
| 285 | if ((i % 5) == 0) |
| 286 | printf("\n"); |
| 287 | printf(" %08lX%5s", |
| 288 | info->start[i], info->protect[i] ? " (RO)" : " "); |
| 289 | } |
| 290 | printf("\n"); |
| 291 | return; |
| 292 | } |
| 293 | |
| 294 | /*----------------------------------------------------------------------- |
| 295 | * Copy memory to flash, returns: |
| 296 | * 0 - OK |
| 297 | * 1 - write timeout |
| 298 | * 2 - Flash not erased |
| 299 | */ |
| 300 | int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt) |
| 301 | { |
| 302 | ulong wp; |
| 303 | ulong cp; |
| 304 | int aln; |
| 305 | cfiword_t cword; |
| 306 | int i, rc; |
| 307 | |
| 308 | /* get lower aligned address */ |
| 309 | wp = (addr & ~(info->portwidth - 1)); |
| 310 | |
| 311 | /* handle unaligned start */ |
| 312 | if ((aln = addr - wp) != 0) { |
| 313 | cword.l = 0; |
| 314 | cp = wp; |
| 315 | for (i = 0; i < aln; ++i, ++cp) |
| 316 | flash_add_byte(info, &cword, (*(uchar *) cp)); |
| 317 | |
| 318 | for (; (i < info->portwidth) && (cnt > 0); i++) { |
| 319 | flash_add_byte(info, &cword, *src++); |
| 320 | cnt--; |
| 321 | cp++; |
| 322 | } |
| 323 | for (; (cnt == 0) && (i < info->portwidth); ++i, ++cp) |
| 324 | flash_add_byte(info, &cword, (*(uchar *) cp)); |
| 325 | if ((rc = flash_write_cfiword(info, wp, cword)) != 0) |
| 326 | return rc; |
| 327 | wp = cp; |
| 328 | } |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 329 | #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE |
Stefan Roese | 99200d2 | 2005-08-22 17:51:53 +0200 | [diff] [blame] | 330 | while (cnt >= info->portwidth) { |
| 331 | i = info->buffer_size > cnt ? cnt : info->buffer_size; |
| 332 | if ((rc = flash_write_cfibuffer(info, wp, src, i)) != ERR_OK) |
| 333 | return rc; |
| 334 | wp += i; |
| 335 | src += i; |
| 336 | cnt -= i; |
| 337 | } |
| 338 | #else |
| 339 | /* handle the aligned part */ |
| 340 | while (cnt >= info->portwidth) { |
| 341 | cword.l = 0; |
| 342 | for (i = 0; i < info->portwidth; i++) { |
| 343 | flash_add_byte(info, &cword, *src++); |
| 344 | } |
| 345 | if ((rc = flash_write_cfiword(info, wp, cword)) != 0) |
| 346 | return rc; |
| 347 | wp += info->portwidth; |
| 348 | cnt -= info->portwidth; |
| 349 | } |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 350 | #endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */ |
Stefan Roese | 99200d2 | 2005-08-22 17:51:53 +0200 | [diff] [blame] | 351 | if (cnt == 0) { |
| 352 | return (0); |
| 353 | } |
| 354 | |
| 355 | /* |
| 356 | * handle unaligned tail bytes |
| 357 | */ |
| 358 | cword.l = 0; |
| 359 | for (i = 0, cp = wp; (i < info->portwidth) && (cnt > 0); ++i, ++cp) { |
| 360 | flash_add_byte(info, &cword, *src++); |
| 361 | --cnt; |
| 362 | } |
| 363 | for (; i < info->portwidth; ++i, ++cp) { |
| 364 | flash_add_byte(info, &cword, (*(uchar *) cp)); |
| 365 | } |
| 366 | |
| 367 | return flash_write_cfiword(info, wp, cword); |
| 368 | } |
| 369 | |
| 370 | /*----------------------------------------------------------------------- |
| 371 | */ |
| 372 | int flash_real_protect(flash_info_t * info, long sector, int prot) |
| 373 | { |
| 374 | int retcode = 0; |
| 375 | |
| 376 | flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS); |
| 377 | flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT); |
| 378 | if (prot) |
| 379 | flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT_SET); |
| 380 | else |
| 381 | flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT_CLEAR); |
| 382 | |
| 383 | if ((retcode = |
| 384 | flash_full_status_check(info, sector, info->erase_blk_tout, |
| 385 | prot ? "protect" : "unprotect")) == 0) { |
| 386 | |
| 387 | info->protect[sector] = prot; |
| 388 | /* Intel's unprotect unprotects all locking */ |
| 389 | if (prot == 0) { |
| 390 | int i; |
| 391 | for (i = 0; i < info->sector_count; i++) { |
| 392 | if (info->protect[i]) |
| 393 | flash_real_protect(info, i, 1); |
| 394 | } |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | return retcode; |
| 399 | } |
| 400 | |
| 401 | /*----------------------------------------------------------------------- |
| 402 | * wait for XSR.7 to be set. Time out with an error if it does not. |
| 403 | * This routine does not set the flash to read-array mode. |
| 404 | */ |
| 405 | static int flash_status_check(flash_info_t * info, ulong sector, ulong tout, |
| 406 | char *prompt) |
| 407 | { |
| 408 | ulong start; |
| 409 | |
| 410 | /* Wait for command completion */ |
| 411 | start = get_timer(0); |
| 412 | while (!flash_isset(info, sector, 0, FLASH_STATUS_DONE)) { |
| 413 | if (get_timer(start) > info->erase_blk_tout) { |
| 414 | printf("Flash %s timeout at address %lx\n", prompt, |
| 415 | info->start[sector]); |
| 416 | flash_write_cmd(info, sector, 0, FLASH_CMD_RESET); |
| 417 | return ERR_TIMOUT; |
| 418 | } |
| 419 | } |
| 420 | return ERR_OK; |
| 421 | } |
| 422 | |
| 423 | /*----------------------------------------------------------------------- |
| 424 | * Wait for XSR.7 to be set, if it times out print an error, otherwise do a full status check. |
| 425 | * This routine sets the flash to read-array mode. |
| 426 | */ |
| 427 | static int flash_full_status_check(flash_info_t * info, ulong sector, |
| 428 | ulong tout, char *prompt) |
| 429 | { |
| 430 | int retcode; |
| 431 | retcode = flash_status_check(info, sector, tout, prompt); |
| 432 | if ((retcode == ERR_OK) |
| 433 | && !flash_isequal(info, sector, 0, FLASH_STATUS_DONE)) { |
| 434 | retcode = ERR_INVAL; |
| 435 | printf("Flash %s error at address %lx\n", prompt, |
| 436 | info->start[sector]); |
| 437 | if (flash_isset |
| 438 | (info, sector, 0, |
| 439 | FLASH_STATUS_ECLBS | FLASH_STATUS_PSLBS)) { |
| 440 | printf("Command Sequence Error.\n"); |
| 441 | } else if (flash_isset(info, sector, 0, FLASH_STATUS_ECLBS)) { |
| 442 | printf("Block Erase Error.\n"); |
| 443 | retcode = ERR_NOT_ERASED; |
| 444 | } else if (flash_isset(info, sector, 0, FLASH_STATUS_PSLBS)) { |
| 445 | printf("Locking Error\n"); |
| 446 | } |
| 447 | if (flash_isset(info, sector, 0, FLASH_STATUS_DPS)) { |
| 448 | printf("Block locked.\n"); |
| 449 | retcode = ERR_PROTECTED; |
| 450 | } |
| 451 | if (flash_isset(info, sector, 0, FLASH_STATUS_VPENS)) |
| 452 | printf("Vpp Low Error.\n"); |
| 453 | } |
| 454 | flash_write_cmd(info, sector, 0, FLASH_CMD_RESET); |
| 455 | return retcode; |
| 456 | } |
| 457 | |
| 458 | /*----------------------------------------------------------------------- |
| 459 | */ |
| 460 | static void flash_add_byte(flash_info_t * info, cfiword_t * cword, uchar c) |
| 461 | { |
| 462 | switch (info->portwidth) { |
| 463 | case FLASH_CFI_8BIT: |
| 464 | cword->c = c; |
| 465 | break; |
| 466 | case FLASH_CFI_16BIT: |
| 467 | cword->w = (cword->w << 8) | c; |
| 468 | break; |
| 469 | case FLASH_CFI_32BIT: |
| 470 | cword->l = (cword->l << 8) | c; |
| 471 | } |
| 472 | } |
| 473 | |
| 474 | /*----------------------------------------------------------------------- |
| 475 | * make a proper sized command based on the port and chip widths |
| 476 | */ |
| 477 | static void flash_make_cmd(flash_info_t * info, uchar cmd, void *cmdbuf) |
| 478 | { |
| 479 | int i; |
| 480 | uchar *cp = (uchar *) cmdbuf; |
| 481 | for (i = 0; i < info->portwidth; i++) |
| 482 | *cp++ = ((i + 1) % info->chipwidth) ? '\0' : cmd; |
| 483 | } |
| 484 | |
| 485 | /* |
| 486 | * Write a proper sized command to the correct address |
| 487 | */ |
| 488 | static void flash_write_cmd(flash_info_t * info, int sect, uchar offset, |
| 489 | uchar cmd) |
| 490 | { |
| 491 | |
| 492 | volatile cfiptr_t addr; |
| 493 | cfiword_t cword; |
| 494 | addr.cp = flash_make_addr(info, sect, offset); |
| 495 | flash_make_cmd(info, cmd, &cword); |
| 496 | switch (info->portwidth) { |
| 497 | case FLASH_CFI_8BIT: |
| 498 | *addr.cp = cword.c; |
| 499 | break; |
| 500 | case FLASH_CFI_16BIT: |
| 501 | *addr.wp = cword.w; |
| 502 | break; |
| 503 | case FLASH_CFI_32BIT: |
| 504 | *addr.lp = cword.l; |
| 505 | break; |
| 506 | } |
| 507 | } |
| 508 | |
| 509 | /*----------------------------------------------------------------------- |
| 510 | */ |
| 511 | static int flash_isequal(flash_info_t * info, int sect, uchar offset, uchar cmd) |
| 512 | { |
| 513 | cfiptr_t cptr; |
| 514 | cfiword_t cword; |
| 515 | int retval; |
| 516 | cptr.cp = flash_make_addr(info, sect, offset); |
| 517 | flash_make_cmd(info, cmd, &cword); |
| 518 | switch (info->portwidth) { |
| 519 | case FLASH_CFI_8BIT: |
| 520 | retval = (cptr.cp[0] == cword.c); |
| 521 | break; |
| 522 | case FLASH_CFI_16BIT: |
| 523 | retval = (cptr.wp[0] == cword.w); |
| 524 | break; |
| 525 | case FLASH_CFI_32BIT: |
| 526 | retval = (cptr.lp[0] == cword.l); |
| 527 | break; |
| 528 | default: |
| 529 | retval = 0; |
| 530 | break; |
| 531 | } |
| 532 | return retval; |
| 533 | } |
| 534 | |
| 535 | /*----------------------------------------------------------------------- |
| 536 | */ |
| 537 | static int flash_isset(flash_info_t * info, int sect, uchar offset, uchar cmd) |
| 538 | { |
| 539 | cfiptr_t cptr; |
| 540 | cfiword_t cword; |
| 541 | int retval; |
| 542 | cptr.cp = flash_make_addr(info, sect, offset); |
| 543 | flash_make_cmd(info, cmd, &cword); |
| 544 | switch (info->portwidth) { |
| 545 | case FLASH_CFI_8BIT: |
| 546 | retval = ((cptr.cp[0] & cword.c) == cword.c); |
| 547 | break; |
| 548 | case FLASH_CFI_16BIT: |
| 549 | retval = ((cptr.wp[0] & cword.w) == cword.w); |
| 550 | break; |
| 551 | case FLASH_CFI_32BIT: |
| 552 | retval = ((cptr.lp[0] & cword.l) == cword.l); |
| 553 | break; |
| 554 | default: |
| 555 | retval = 0; |
| 556 | break; |
| 557 | } |
| 558 | return retval; |
| 559 | } |
| 560 | |
| 561 | /*----------------------------------------------------------------------- |
| 562 | * detect if flash is compatible with the Common Flash Interface (CFI) |
| 563 | * http://www.jedec.org/download/search/jesd68.pdf |
| 564 | * |
| 565 | */ |
| 566 | static int flash_detect_cfi(flash_info_t * info) |
| 567 | { |
| 568 | |
| 569 | for (info->portwidth = FLASH_CFI_8BIT; |
| 570 | info->portwidth <= FLASH_CFI_32BIT; info->portwidth <<= 1) { |
| 571 | for (info->chipwidth = FLASH_CFI_BY8; |
| 572 | info->chipwidth <= info->portwidth; |
| 573 | info->chipwidth <<= 1) { |
| 574 | flash_write_cmd(info, 0, 0, FLASH_CMD_RESET); |
| 575 | flash_write_cmd(info, 0, FLASH_OFFSET_CFI, |
| 576 | FLASH_CMD_CFI); |
| 577 | if (flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP, 'Q') |
| 578 | && flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP + 1, |
| 579 | 'R') |
| 580 | && flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP + 2, |
| 581 | 'Y')) |
| 582 | return 1; |
| 583 | } |
| 584 | } |
| 585 | return 0; |
| 586 | } |
| 587 | |
| 588 | /* |
| 589 | * The following code cannot be run from FLASH! |
| 590 | * |
| 591 | */ |
| 592 | static ulong flash_get_size(ulong base, int banknum) |
| 593 | { |
| 594 | flash_info_t *info = &flash_info[banknum]; |
| 595 | int i, j; |
| 596 | int sect_cnt; |
| 597 | unsigned long sector; |
| 598 | unsigned long tmp; |
| 599 | int size_ratio = 0; |
| 600 | uchar num_erase_regions; |
| 601 | int erase_region_size; |
| 602 | int erase_region_count; |
| 603 | |
| 604 | info->start[0] = base; |
| 605 | #if 0 |
| 606 | invalidate_dcache_range(base, base + 0x400); |
| 607 | #endif |
| 608 | if (flash_detect_cfi(info)) { |
| 609 | |
| 610 | size_ratio = info->portwidth / info->chipwidth; |
| 611 | num_erase_regions = |
| 612 | flash_read_uchar(info, FLASH_OFFSET_NUM_ERASE_REGIONS); |
| 613 | |
| 614 | sect_cnt = 0; |
| 615 | sector = base; |
| 616 | for (i = 0; i < num_erase_regions; i++) { |
| 617 | if (i > NUM_ERASE_REGIONS) { |
| 618 | printf("%d erase regions found, only %d used\n", |
| 619 | num_erase_regions, NUM_ERASE_REGIONS); |
| 620 | break; |
| 621 | } |
| 622 | tmp = |
| 623 | flash_read_long(info, 0, |
| 624 | FLASH_OFFSET_ERASE_REGIONS); |
| 625 | erase_region_size = |
| 626 | (tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128; |
| 627 | tmp >>= 16; |
| 628 | erase_region_count = (tmp & 0xffff) + 1; |
| 629 | for (j = 0; j < erase_region_count; j++) { |
| 630 | info->start[sect_cnt] = sector; |
| 631 | sector += (erase_region_size * size_ratio); |
| 632 | info->protect[sect_cnt] = |
| 633 | flash_isset(info, sect_cnt, |
| 634 | FLASH_OFFSET_PROTECT, |
| 635 | FLASH_STATUS_PROTECT); |
| 636 | sect_cnt++; |
| 637 | } |
| 638 | } |
| 639 | |
| 640 | info->sector_count = sect_cnt; |
| 641 | /* multiply the size by the number of chips */ |
| 642 | info->size = |
| 643 | (1 << flash_read_uchar(info, FLASH_OFFSET_SIZE)) * |
| 644 | size_ratio; |
| 645 | info->buffer_size = |
| 646 | (1 << flash_read_ushort(info, 0, FLASH_OFFSET_BUFFER_SIZE)); |
| 647 | tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_ETOUT); |
| 648 | info->erase_blk_tout = |
| 649 | (tmp * |
| 650 | (1 << flash_read_uchar(info, FLASH_OFFSET_EMAX_TOUT))); |
| 651 | tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_WBTOUT); |
| 652 | info->buffer_write_tout = |
| 653 | (tmp * |
| 654 | (1 << flash_read_uchar(info, FLASH_OFFSET_WBMAX_TOUT))); |
| 655 | tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_WTOUT); |
| 656 | info->write_tout = |
| 657 | (tmp * |
| 658 | (1 << flash_read_uchar(info, FLASH_OFFSET_WMAX_TOUT))) / |
| 659 | 1000; |
| 660 | info->flash_id = FLASH_MAN_CFI; |
| 661 | } |
| 662 | |
| 663 | flash_write_cmd(info, 0, 0, FLASH_CMD_RESET); |
| 664 | #ifdef DEBUG_FLASH |
| 665 | printf("portwidth=%d chipwidth=%d\n", info->portwidth, info->chipwidth); /* test-only */ |
| 666 | #endif |
| 667 | #ifdef DEBUG_FLASH |
| 668 | printf("found %d erase regions\n", num_erase_regions); |
| 669 | #endif |
| 670 | #ifdef DEBUG_FLASH |
| 671 | printf("size=%08x sectors=%08x \n", info->size, info->sector_count); |
| 672 | #endif |
| 673 | return (info->size); |
| 674 | } |
| 675 | |
| 676 | /*----------------------------------------------------------------------- |
| 677 | */ |
| 678 | static int flash_write_cfiword(flash_info_t * info, ulong dest, cfiword_t cword) |
| 679 | { |
| 680 | |
| 681 | cfiptr_t ctladdr; |
| 682 | cfiptr_t cptr; |
| 683 | int flag; |
| 684 | |
| 685 | ctladdr.cp = flash_make_addr(info, 0, 0); |
| 686 | cptr.cp = (uchar *) dest; |
| 687 | |
| 688 | /* Check if Flash is (sufficiently) erased */ |
| 689 | switch (info->portwidth) { |
| 690 | case FLASH_CFI_8BIT: |
| 691 | flag = ((cptr.cp[0] & cword.c) == cword.c); |
| 692 | break; |
| 693 | case FLASH_CFI_16BIT: |
| 694 | flag = ((cptr.wp[0] & cword.w) == cword.w); |
| 695 | break; |
| 696 | case FLASH_CFI_32BIT: |
| 697 | flag = ((cptr.lp[0] & cword.l) == cword.l); |
| 698 | break; |
| 699 | default: |
| 700 | return 2; |
| 701 | } |
| 702 | if (!flag) |
| 703 | return 2; |
| 704 | |
| 705 | /* Disable interrupts which might cause a timeout here */ |
| 706 | flag = disable_interrupts(); |
| 707 | |
| 708 | flash_write_cmd(info, 0, 0, FLASH_CMD_CLEAR_STATUS); |
| 709 | flash_write_cmd(info, 0, 0, FLASH_CMD_WRITE); |
| 710 | |
| 711 | switch (info->portwidth) { |
| 712 | case FLASH_CFI_8BIT: |
| 713 | cptr.cp[0] = cword.c; |
| 714 | break; |
| 715 | case FLASH_CFI_16BIT: |
| 716 | cptr.wp[0] = cword.w; |
| 717 | break; |
| 718 | case FLASH_CFI_32BIT: |
| 719 | cptr.lp[0] = cword.l; |
| 720 | break; |
| 721 | } |
| 722 | |
| 723 | /* re-enable interrupts if necessary */ |
| 724 | if (flag) |
| 725 | enable_interrupts(); |
| 726 | |
| 727 | return flash_full_status_check(info, 0, info->write_tout, "write"); |
| 728 | } |
| 729 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 730 | #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE |
Stefan Roese | 99200d2 | 2005-08-22 17:51:53 +0200 | [diff] [blame] | 731 | |
| 732 | /* loop through the sectors from the highest address |
| 733 | * when the passed address is greater or equal to the sector address |
| 734 | * we have a match |
| 735 | */ |
| 736 | static int find_sector(flash_info_t * info, ulong addr) |
| 737 | { |
| 738 | int sector; |
| 739 | for (sector = info->sector_count - 1; sector >= 0; sector--) { |
| 740 | if (addr >= info->start[sector]) |
| 741 | break; |
| 742 | } |
| 743 | return sector; |
| 744 | } |
| 745 | |
| 746 | static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp, |
| 747 | int len) |
| 748 | { |
| 749 | |
| 750 | int sector; |
| 751 | int cnt; |
| 752 | int retcode; |
| 753 | volatile cfiptr_t src; |
| 754 | volatile cfiptr_t dst; |
| 755 | |
| 756 | src.cp = cp; |
| 757 | dst.cp = (uchar *) dest; |
| 758 | sector = find_sector(info, dest); |
| 759 | flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS); |
| 760 | flash_write_cmd(info, sector, 0, FLASH_CMD_WRITE_TO_BUFFER); |
| 761 | if ((retcode = flash_status_check(info, sector, info->buffer_write_tout, |
| 762 | "write to buffer")) == ERR_OK) { |
| 763 | switch (info->portwidth) { |
| 764 | case FLASH_CFI_8BIT: |
| 765 | cnt = len; |
| 766 | break; |
| 767 | case FLASH_CFI_16BIT: |
| 768 | cnt = len >> 1; |
| 769 | break; |
| 770 | case FLASH_CFI_32BIT: |
| 771 | cnt = len >> 2; |
| 772 | break; |
| 773 | default: |
| 774 | return ERR_INVAL; |
| 775 | break; |
| 776 | } |
| 777 | flash_write_cmd(info, sector, 0, (uchar) cnt - 1); |
| 778 | while (cnt-- > 0) { |
| 779 | switch (info->portwidth) { |
| 780 | case FLASH_CFI_8BIT: |
| 781 | *dst.cp++ = *src.cp++; |
| 782 | break; |
| 783 | case FLASH_CFI_16BIT: |
| 784 | *dst.wp++ = *src.wp++; |
| 785 | break; |
| 786 | case FLASH_CFI_32BIT: |
| 787 | *dst.lp++ = *src.lp++; |
| 788 | break; |
| 789 | default: |
| 790 | return ERR_INVAL; |
| 791 | break; |
| 792 | } |
| 793 | } |
| 794 | flash_write_cmd(info, sector, 0, |
| 795 | FLASH_CMD_WRITE_BUFFER_CONFIRM); |
| 796 | retcode = |
| 797 | flash_full_status_check(info, sector, |
| 798 | info->buffer_write_tout, |
| 799 | "buffer write"); |
| 800 | } |
| 801 | flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS); |
| 802 | return retcode; |
| 803 | } |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 804 | #endif /* CONFIG_SYS_USE_FLASH_BUFFER_WRITE */ |