1 /* 2 * Common Flash Interface support: 3 * Intel Extended Vendor Command Set (ID 0x0001) 4 * 5 * (C) 2000 Red Hat. GPL'd 6 * 7 * 8 * 10/10/2000 Nicolas Pitre <nico@fluxnic.net> 9 * - completely revamped method functions so they are aware and 10 * independent of the flash geometry (buswidth, interleave, etc.) 11 * - scalability vs code size is completely set at compile-time 12 * (see include/linux/mtd/cfi.h for selection) 13 * - optimized write buffer method 14 * 02/05/2002 Christopher Hoover <ch@hpl.hp.com>/<ch@murgatroid.com> 15 * - reworked lock/unlock/erase support for var size flash 16 * 21/03/2007 Rodolfo Giometti <giometti@linux.it> 17 * - auto unlock sectors on resume for auto locking flash on power up 18 */ 19 20 #include <linux/module.h> 21 #include <linux/types.h> 22 #include <linux/kernel.h> 23 #include <linux/sched.h> 24 #include <linux/init.h> 25 #include <asm/io.h> 26 #include <asm/byteorder.h> 27 28 #include <linux/errno.h> 29 #include <linux/slab.h> 30 #include <linux/delay.h> 31 #include <linux/interrupt.h> 32 #include <linux/reboot.h> 33 #include <linux/bitmap.h> 34 #include <linux/mtd/xip.h> 35 #include <linux/mtd/map.h> 36 #include <linux/mtd/mtd.h> 37 #include <linux/mtd/cfi.h> 38 39 /* #define CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE */ 40 /* #define CMDSET0001_DISABLE_WRITE_SUSPEND */ 41 42 // debugging, turns off buffer write mode if set to 1 43 #define FORCE_WORD_WRITE 0 44 45 /* Intel chips */ 46 #define I82802AB 0x00ad 47 #define I82802AC 0x00ac 48 #define PF38F4476 0x881c 49 /* STMicroelectronics chips */ 50 #define M50LPW080 0x002F 51 #define M50FLW080A 0x0080 52 #define M50FLW080B 0x0081 53 /* Atmel chips */ 54 #define AT49BV640D 0x02de 55 #define AT49BV640DT 0x02db 56 57 static int cfi_intelext_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); 58 static int cfi_intelext_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); 59 static int cfi_intelext_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); 60 static int cfi_intelext_writev(struct mtd_info *, const struct kvec *, unsigned long, loff_t, size_t *); 61 static int cfi_intelext_erase_varsize(struct mtd_info *, struct erase_info *); 62 static void cfi_intelext_sync (struct mtd_info *); 63 static int cfi_intelext_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len); 64 static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len); 65 static int cfi_intelext_is_locked(struct mtd_info *mtd, loff_t ofs, 66 uint64_t len); 67 #ifdef CONFIG_MTD_OTP 68 static int cfi_intelext_read_fact_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *); 69 static int cfi_intelext_read_user_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *); 70 static int cfi_intelext_write_user_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *); 71 static int cfi_intelext_lock_user_prot_reg (struct mtd_info *, loff_t, size_t); 72 static int cfi_intelext_get_fact_prot_info (struct mtd_info *, 73 struct otp_info *, size_t); 74 static int cfi_intelext_get_user_prot_info (struct mtd_info *, 75 struct otp_info *, size_t); 76 #endif 77 static int cfi_intelext_suspend (struct mtd_info *); 78 static void cfi_intelext_resume (struct mtd_info *); 79 static int cfi_intelext_reboot (struct notifier_block *, unsigned long, void *); 80 81 static void cfi_intelext_destroy(struct mtd_info *); 82 83 struct mtd_info *cfi_cmdset_0001(struct map_info *, int); 84 85 static struct mtd_info *cfi_intelext_setup (struct mtd_info *); 86 static int cfi_intelext_partition_fixup(struct mtd_info *, struct cfi_private **); 87 88 static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, 89 size_t *retlen, void **virt, resource_size_t *phys); 90 static void cfi_intelext_unpoint(struct mtd_info *mtd, loff_t from, size_t len); 91 92 static int chip_ready (struct map_info *map, struct flchip *chip, unsigned long adr, int mode); 93 static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode); 94 static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr); 95 #include "fwh_lock.h" 96 97 98 99 /* 100 * *********** SETUP AND PROBE BITS *********** 101 */ 102 103 static struct mtd_chip_driver cfi_intelext_chipdrv = { 104 .probe = NULL, /* Not usable directly */ 105 .destroy = cfi_intelext_destroy, 106 .name = "cfi_cmdset_0001", 107 .module = THIS_MODULE 108 }; 109 110 /* #define DEBUG_LOCK_BITS */ 111 /* #define DEBUG_CFI_FEATURES */ 112 113 #ifdef DEBUG_CFI_FEATURES 114 static void cfi_tell_features(struct cfi_pri_intelext *extp) 115 { 116 int i; 117 printk(" Extended Query version %c.%c\n", extp->MajorVersion, extp->MinorVersion); 118 printk(" Feature/Command Support: %4.4X\n", extp->FeatureSupport); 119 printk(" - Chip Erase: %s\n", extp->FeatureSupport&1?"supported":"unsupported"); 120 printk(" - Suspend Erase: %s\n", extp->FeatureSupport&2?"supported":"unsupported"); 121 printk(" - Suspend Program: %s\n", extp->FeatureSupport&4?"supported":"unsupported"); 122 printk(" - Legacy Lock/Unlock: %s\n", extp->FeatureSupport&8?"supported":"unsupported"); 123 printk(" - Queued Erase: %s\n", extp->FeatureSupport&16?"supported":"unsupported"); 124 printk(" - Instant block lock: %s\n", extp->FeatureSupport&32?"supported":"unsupported"); 125 printk(" - Protection Bits: %s\n", extp->FeatureSupport&64?"supported":"unsupported"); 126 printk(" - Page-mode read: %s\n", extp->FeatureSupport&128?"supported":"unsupported"); 127 printk(" - Synchronous read: %s\n", extp->FeatureSupport&256?"supported":"unsupported"); 128 printk(" - Simultaneous operations: %s\n", extp->FeatureSupport&512?"supported":"unsupported"); 129 printk(" - Extended Flash Array: %s\n", extp->FeatureSupport&1024?"supported":"unsupported"); 130 for (i=11; i<32; i++) { 131 if (extp->FeatureSupport & (1<<i)) 132 printk(" - Unknown Bit %X: supported\n", i); 133 } 134 135 printk(" Supported functions after Suspend: %2.2X\n", extp->SuspendCmdSupport); 136 printk(" - Program after Erase Suspend: %s\n", extp->SuspendCmdSupport&1?"supported":"unsupported"); 137 for (i=1; i<8; i++) { 138 if (extp->SuspendCmdSupport & (1<<i)) 139 printk(" - Unknown Bit %X: supported\n", i); 140 } 141 142 printk(" Block Status Register Mask: %4.4X\n", extp->BlkStatusRegMask); 143 printk(" - Lock Bit Active: %s\n", extp->BlkStatusRegMask&1?"yes":"no"); 144 printk(" - Lock-Down Bit Active: %s\n", extp->BlkStatusRegMask&2?"yes":"no"); 145 for (i=2; i<3; i++) { 146 if (extp->BlkStatusRegMask & (1<<i)) 147 printk(" - Unknown Bit %X Active: yes\n",i); 148 } 149 printk(" - EFA Lock Bit: %s\n", extp->BlkStatusRegMask&16?"yes":"no"); 150 printk(" - EFA Lock-Down Bit: %s\n", extp->BlkStatusRegMask&32?"yes":"no"); 151 for (i=6; i<16; i++) { 152 if (extp->BlkStatusRegMask & (1<<i)) 153 printk(" - Unknown Bit %X Active: yes\n",i); 154 } 155 156 printk(" Vcc Logic Supply Optimum Program/Erase Voltage: %d.%d V\n", 157 extp->VccOptimal >> 4, extp->VccOptimal & 0xf); 158 if (extp->VppOptimal) 159 printk(" Vpp Programming Supply Optimum Program/Erase Voltage: %d.%d V\n", 160 extp->VppOptimal >> 4, extp->VppOptimal & 0xf); 161 } 162 #endif 163 164 /* Atmel chips don't use the same PRI format as Intel chips */ 165 static void fixup_convert_atmel_pri(struct mtd_info *mtd) 166 { 167 struct map_info *map = mtd->priv; 168 struct cfi_private *cfi = map->fldrv_priv; 169 struct cfi_pri_intelext *extp = cfi->cmdset_priv; 170 struct cfi_pri_atmel atmel_pri; 171 uint32_t features = 0; 172 173 /* Reverse byteswapping */ 174 extp->FeatureSupport = cpu_to_le32(extp->FeatureSupport); 175 extp->BlkStatusRegMask = cpu_to_le16(extp->BlkStatusRegMask); 176 extp->ProtRegAddr = cpu_to_le16(extp->ProtRegAddr); 177 178 memcpy(&atmel_pri, extp, sizeof(atmel_pri)); 179 memset((char *)extp + 5, 0, sizeof(*extp) - 5); 180 181 printk(KERN_ERR "atmel Features: %02x\n", atmel_pri.Features); 182 183 if (atmel_pri.Features & 0x01) /* chip erase supported */ 184 features |= (1<<0); 185 if (atmel_pri.Features & 0x02) /* erase suspend supported */ 186 features |= (1<<1); 187 if (atmel_pri.Features & 0x04) /* program suspend supported */ 188 features |= (1<<2); 189 if (atmel_pri.Features & 0x08) /* simultaneous operations supported */ 190 features |= (1<<9); 191 if (atmel_pri.Features & 0x20) /* page mode read supported */ 192 features |= (1<<7); 193 if (atmel_pri.Features & 0x40) /* queued erase supported */ 194 features |= (1<<4); 195 if (atmel_pri.Features & 0x80) /* Protection bits supported */ 196 features |= (1<<6); 197 198 extp->FeatureSupport = features; 199 200 /* burst write mode not supported */ 201 cfi->cfiq->BufWriteTimeoutTyp = 0; 202 cfi->cfiq->BufWriteTimeoutMax = 0; 203 } 204 205 static void fixup_at49bv640dx_lock(struct mtd_info *mtd) 206 { 207 struct map_info *map = mtd->priv; 208 struct cfi_private *cfi = map->fldrv_priv; 209 struct cfi_pri_intelext *cfip = cfi->cmdset_priv; 210 211 cfip->FeatureSupport |= (1 << 5); 212 mtd->flags |= MTD_POWERUP_LOCK; 213 } 214 215 #ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE 216 /* Some Intel Strata Flash prior to FPO revision C has bugs in this area */ 217 static void fixup_intel_strataflash(struct mtd_info *mtd) 218 { 219 struct map_info *map = mtd->priv; 220 struct cfi_private *cfi = map->fldrv_priv; 221 struct cfi_pri_intelext *extp = cfi->cmdset_priv; 222 223 printk(KERN_WARNING "cfi_cmdset_0001: Suspend " 224 "erase on write disabled.\n"); 225 extp->SuspendCmdSupport &= ~1; 226 } 227 #endif 228 229 #ifdef CMDSET0001_DISABLE_WRITE_SUSPEND 230 static void fixup_no_write_suspend(struct mtd_info *mtd) 231 { 232 struct map_info *map = mtd->priv; 233 struct cfi_private *cfi = map->fldrv_priv; 234 struct cfi_pri_intelext *cfip = cfi->cmdset_priv; 235 236 if (cfip && (cfip->FeatureSupport&4)) { 237 cfip->FeatureSupport &= ~4; 238 printk(KERN_WARNING "cfi_cmdset_0001: write suspend disabled\n"); 239 } 240 } 241 #endif 242 243 static void fixup_st_m28w320ct(struct mtd_info *mtd) 244 { 245 struct map_info *map = mtd->priv; 246 struct cfi_private *cfi = map->fldrv_priv; 247 248 cfi->cfiq->BufWriteTimeoutTyp = 0; /* Not supported */ 249 cfi->cfiq->BufWriteTimeoutMax = 0; /* Not supported */ 250 } 251 252 static void fixup_st_m28w320cb(struct mtd_info *mtd) 253 { 254 struct map_info *map = mtd->priv; 255 struct cfi_private *cfi = map->fldrv_priv; 256 257 /* Note this is done after the region info is endian swapped */ 258 cfi->cfiq->EraseRegionInfo[1] = 259 (cfi->cfiq->EraseRegionInfo[1] & 0xffff0000) | 0x3e; 260 }; 261 262 static void fixup_use_point(struct mtd_info *mtd) 263 { 264 struct map_info *map = mtd->priv; 265 if (!mtd->point && map_is_linear(map)) { 266 mtd->point = cfi_intelext_point; 267 mtd->unpoint = cfi_intelext_unpoint; 268 } 269 } 270 271 static void fixup_use_write_buffers(struct mtd_info *mtd) 272 { 273 struct map_info *map = mtd->priv; 274 struct cfi_private *cfi = map->fldrv_priv; 275 if (cfi->cfiq->BufWriteTimeoutTyp) { 276 printk(KERN_INFO "Using buffer write method\n" ); 277 mtd->write = cfi_intelext_write_buffers; 278 mtd->writev = cfi_intelext_writev; 279 } 280 } 281 282 /* 283 * Some chips power-up with all sectors locked by default. 284 */ 285 static void fixup_unlock_powerup_lock(struct mtd_info *mtd) 286 { 287 struct map_info *map = mtd->priv; 288 struct cfi_private *cfi = map->fldrv_priv; 289 struct cfi_pri_intelext *cfip = cfi->cmdset_priv; 290 291 if (cfip->FeatureSupport&32) { 292 printk(KERN_INFO "Using auto-unlock on power-up/resume\n" ); 293 mtd->flags |= MTD_POWERUP_LOCK; 294 } 295 } 296 297 static struct cfi_fixup cfi_fixup_table[] = { 298 { CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri }, 299 { CFI_MFR_ATMEL, AT49BV640D, fixup_at49bv640dx_lock }, 300 { CFI_MFR_ATMEL, AT49BV640DT, fixup_at49bv640dx_lock }, 301 #ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE 302 { CFI_MFR_ANY, CFI_ID_ANY, fixup_intel_strataflash }, 303 #endif 304 #ifdef CMDSET0001_DISABLE_WRITE_SUSPEND 305 { CFI_MFR_ANY, CFI_ID_ANY, fixup_no_write_suspend }, 306 #endif 307 #if !FORCE_WORD_WRITE 308 { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers }, 309 #endif 310 { CFI_MFR_ST, 0x00ba, /* M28W320CT */ fixup_st_m28w320ct }, 311 { CFI_MFR_ST, 0x00bb, /* M28W320CB */ fixup_st_m28w320cb }, 312 { CFI_MFR_INTEL, CFI_ID_ANY, fixup_unlock_powerup_lock }, 313 { 0, 0, NULL } 314 }; 315 316 static struct cfi_fixup jedec_fixup_table[] = { 317 { CFI_MFR_INTEL, I82802AB, fixup_use_fwh_lock }, 318 { CFI_MFR_INTEL, I82802AC, fixup_use_fwh_lock }, 319 { CFI_MFR_ST, M50LPW080, fixup_use_fwh_lock }, 320 { CFI_MFR_ST, M50FLW080A, fixup_use_fwh_lock }, 321 { CFI_MFR_ST, M50FLW080B, fixup_use_fwh_lock }, 322 { 0, 0, NULL } 323 }; 324 static struct cfi_fixup fixup_table[] = { 325 /* The CFI vendor ids and the JEDEC vendor IDs appear 326 * to be common. It is like the devices id's are as 327 * well. This table is to pick all cases where 328 * we know that is the case. 329 */ 330 { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_point }, 331 { 0, 0, NULL } 332 }; 333 334 static void cfi_fixup_major_minor(struct cfi_private *cfi, 335 struct cfi_pri_intelext *extp) 336 { 337 if (cfi->mfr == CFI_MFR_INTEL && 338 cfi->id == PF38F4476 && extp->MinorVersion == '3') 339 extp->MinorVersion = '1'; 340 } 341 342 static inline struct cfi_pri_intelext * 343 read_pri_intelext(struct map_info *map, __u16 adr) 344 { 345 struct cfi_private *cfi = map->fldrv_priv; 346 struct cfi_pri_intelext *extp; 347 unsigned int extra_size = 0; 348 unsigned int extp_size = sizeof(*extp); 349 350 again: 351 extp = (struct cfi_pri_intelext *)cfi_read_pri(map, adr, extp_size, "Intel/Sharp"); 352 if (!extp) 353 return NULL; 354 355 cfi_fixup_major_minor(cfi, extp); 356 357 if (extp->MajorVersion != '1' || 358 (extp->MinorVersion < '0' || extp->MinorVersion > '5')) { 359 printk(KERN_ERR " Unknown Intel/Sharp Extended Query " 360 "version %c.%c.\n", extp->MajorVersion, 361 extp->MinorVersion); 362 kfree(extp); 363 return NULL; 364 } 365 366 /* Do some byteswapping if necessary */ 367 extp->FeatureSupport = le32_to_cpu(extp->FeatureSupport); 368 extp->BlkStatusRegMask = le16_to_cpu(extp->BlkStatusRegMask); 369 extp->ProtRegAddr = le16_to_cpu(extp->ProtRegAddr); 370 371 if (extp->MinorVersion >= '0') { 372 extra_size = 0; 373 374 /* Protection Register info */ 375 extra_size += (extp->NumProtectionFields - 1) * 376 sizeof(struct cfi_intelext_otpinfo); 377 } 378 379 if (extp->MinorVersion >= '1') { 380 /* Burst Read info */ 381 extra_size += 2; 382 if (extp_size < sizeof(*extp) + extra_size) 383 goto need_more; 384 extra_size += extp->extra[extra_size - 1]; 385 } 386 387 if (extp->MinorVersion >= '3') { 388 int nb_parts, i; 389 390 /* Number of hardware-partitions */ 391 extra_size += 1; 392 if (extp_size < sizeof(*extp) + extra_size) 393 goto need_more; 394 nb_parts = extp->extra[extra_size - 1]; 395 396 /* skip the sizeof(partregion) field in CFI 1.4 */ 397 if (extp->MinorVersion >= '4') 398 extra_size += 2; 399 400 for (i = 0; i < nb_parts; i++) { 401 struct cfi_intelext_regioninfo *rinfo; 402 rinfo = (struct cfi_intelext_regioninfo *)&extp->extra[extra_size]; 403 extra_size += sizeof(*rinfo); 404 if (extp_size < sizeof(*extp) + extra_size) 405 goto need_more; 406 rinfo->NumIdentPartitions=le16_to_cpu(rinfo->NumIdentPartitions); 407 extra_size += (rinfo->NumBlockTypes - 1) 408 * sizeof(struct cfi_intelext_blockinfo); 409 } 410 411 if (extp->MinorVersion >= '4') 412 extra_size += sizeof(struct cfi_intelext_programming_regioninfo); 413 414 if (extp_size < sizeof(*extp) + extra_size) { 415 need_more: 416 extp_size = sizeof(*extp) + extra_size; 417 kfree(extp); 418 if (extp_size > 4096) { 419 printk(KERN_ERR 420 "%s: cfi_pri_intelext is too fat\n", 421 __func__); 422 return NULL; 423 } 424 goto again; 425 } 426 } 427 428 return extp; 429 } 430 431 struct mtd_info *cfi_cmdset_0001(struct map_info *map, int primary) 432 { 433 struct cfi_private *cfi = map->fldrv_priv; 434 struct mtd_info *mtd; 435 int i; 436 437 mtd = kzalloc(sizeof(*mtd), GFP_KERNEL); 438 if (!mtd) { 439 printk(KERN_ERR "Failed to allocate memory for MTD device\n"); 440 return NULL; 441 } 442 mtd->priv = map; 443 mtd->type = MTD_NORFLASH; 444 445 /* Fill in the default mtd operations */ 446 mtd->erase = cfi_intelext_erase_varsize; 447 mtd->read = cfi_intelext_read; 448 mtd->write = cfi_intelext_write_words; 449 mtd->sync = cfi_intelext_sync; 450 mtd->lock = cfi_intelext_lock; 451 mtd->unlock = cfi_intelext_unlock; 452 mtd->is_locked = cfi_intelext_is_locked; 453 mtd->suspend = cfi_intelext_suspend; 454 mtd->resume = cfi_intelext_resume; 455 mtd->flags = MTD_CAP_NORFLASH; 456 mtd->name = map->name; 457 mtd->writesize = 1; 458 mtd->writebufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; 459 460 mtd->reboot_notifier.notifier_call = cfi_intelext_reboot; 461 462 if (cfi->cfi_mode == CFI_MODE_CFI) { 463 /* 464 * It's a real CFI chip, not one for which the probe 465 * routine faked a CFI structure. So we read the feature 466 * table from it. 467 */ 468 __u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR; 469 struct cfi_pri_intelext *extp; 470 471 extp = read_pri_intelext(map, adr); 472 if (!extp) { 473 kfree(mtd); 474 return NULL; 475 } 476 477 /* Install our own private info structure */ 478 cfi->cmdset_priv = extp; 479 480 cfi_fixup(mtd, cfi_fixup_table); 481 482 #ifdef DEBUG_CFI_FEATURES 483 /* Tell the user about it in lots of lovely detail */ 484 cfi_tell_features(extp); 485 #endif 486 487 if(extp->SuspendCmdSupport & 1) { 488 printk(KERN_NOTICE "cfi_cmdset_0001: Erase suspend on write enabled\n"); 489 } 490 } 491 else if (cfi->cfi_mode == CFI_MODE_JEDEC) { 492 /* Apply jedec specific fixups */ 493 cfi_fixup(mtd, jedec_fixup_table); 494 } 495 /* Apply generic fixups */ 496 cfi_fixup(mtd, fixup_table); 497 498 for (i=0; i< cfi->numchips; i++) { 499 if (cfi->cfiq->WordWriteTimeoutTyp) 500 cfi->chips[i].word_write_time = 501 1<<cfi->cfiq->WordWriteTimeoutTyp; 502 else 503 cfi->chips[i].word_write_time = 50000; 504 505 if (cfi->cfiq->BufWriteTimeoutTyp) 506 cfi->chips[i].buffer_write_time = 507 1<<cfi->cfiq->BufWriteTimeoutTyp; 508 /* No default; if it isn't specified, we won't use it */ 509 510 if (cfi->cfiq->BlockEraseTimeoutTyp) 511 cfi->chips[i].erase_time = 512 1000<<cfi->cfiq->BlockEraseTimeoutTyp; 513 else 514 cfi->chips[i].erase_time = 2000000; 515 516 if (cfi->cfiq->WordWriteTimeoutTyp && 517 cfi->cfiq->WordWriteTimeoutMax) 518 cfi->chips[i].word_write_time_max = 519 1<<(cfi->cfiq->WordWriteTimeoutTyp + 520 cfi->cfiq->WordWriteTimeoutMax); 521 else 522 cfi->chips[i].word_write_time_max = 50000 * 8; 523 524 if (cfi->cfiq->BufWriteTimeoutTyp && 525 cfi->cfiq->BufWriteTimeoutMax) 526 cfi->chips[i].buffer_write_time_max = 527 1<<(cfi->cfiq->BufWriteTimeoutTyp + 528 cfi->cfiq->BufWriteTimeoutMax); 529 530 if (cfi->cfiq->BlockEraseTimeoutTyp && 531 cfi->cfiq->BlockEraseTimeoutMax) 532 cfi->chips[i].erase_time_max = 533 1000<<(cfi->cfiq->BlockEraseTimeoutTyp + 534 cfi->cfiq->BlockEraseTimeoutMax); 535 else 536 cfi->chips[i].erase_time_max = 2000000 * 8; 537 538 cfi->chips[i].ref_point_counter = 0; 539 init_waitqueue_head(&(cfi->chips[i].wq)); 540 } 541 542 map->fldrv = &cfi_intelext_chipdrv; 543 544 return cfi_intelext_setup(mtd); 545 } 546 struct mtd_info *cfi_cmdset_0003(struct map_info *map, int primary) __attribute__((alias("cfi_cmdset_0001"))); 547 struct mtd_info *cfi_cmdset_0200(struct map_info *map, int primary) __attribute__((alias("cfi_cmdset_0001"))); 548 EXPORT_SYMBOL_GPL(cfi_cmdset_0001); 549 EXPORT_SYMBOL_GPL(cfi_cmdset_0003); 550 EXPORT_SYMBOL_GPL(cfi_cmdset_0200); 551 552 static struct mtd_info *cfi_intelext_setup(struct mtd_info *mtd) 553 { 554 struct map_info *map = mtd->priv; 555 struct cfi_private *cfi = map->fldrv_priv; 556 unsigned long offset = 0; 557 int i,j; 558 unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave; 559 560 //printk(KERN_DEBUG "number of CFI chips: %d\n", cfi->numchips); 561 562 mtd->size = devsize * cfi->numchips; 563 564 mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips; 565 mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) 566 * mtd->numeraseregions, GFP_KERNEL); 567 if (!mtd->eraseregions) { 568 printk(KERN_ERR "Failed to allocate memory for MTD erase region info\n"); 569 goto setup_err; 570 } 571 572 for (i=0; i<cfi->cfiq->NumEraseRegions; i++) { 573 unsigned long ernum, ersize; 574 ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave; 575 ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1; 576 577 if (mtd->erasesize < ersize) { 578 mtd->erasesize = ersize; 579 } 580 for (j=0; j<cfi->numchips; j++) { 581 mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset; 582 mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize; 583 mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum; 584 mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].lockmap = kmalloc(ernum / 8 + 1, GFP_KERNEL); 585 } 586 offset += (ersize * ernum); 587 } 588 589 if (offset != devsize) { 590 /* Argh */ 591 printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize); 592 goto setup_err; 593 } 594 595 for (i=0; i<mtd->numeraseregions;i++){ 596 printk(KERN_DEBUG "erase region %d: offset=0x%llx,size=0x%x,blocks=%d\n", 597 i,(unsigned long long)mtd->eraseregions[i].offset, 598 mtd->eraseregions[i].erasesize, 599 mtd->eraseregions[i].numblocks); 600 } 601 602 #ifdef CONFIG_MTD_OTP 603 mtd->read_fact_prot_reg = cfi_intelext_read_fact_prot_reg; 604 mtd->read_user_prot_reg = cfi_intelext_read_user_prot_reg; 605 mtd->write_user_prot_reg = cfi_intelext_write_user_prot_reg; 606 mtd->lock_user_prot_reg = cfi_intelext_lock_user_prot_reg; 607 mtd->get_fact_prot_info = cfi_intelext_get_fact_prot_info; 608 mtd->get_user_prot_info = cfi_intelext_get_user_prot_info; 609 #endif 610 611 /* This function has the potential to distort the reality 612 a bit and therefore should be called last. */ 613 if (cfi_intelext_partition_fixup(mtd, &cfi) != 0) 614 goto setup_err; 615 616 __module_get(THIS_MODULE); 617 register_reboot_notifier(&mtd->reboot_notifier); 618 return mtd; 619 620 setup_err: 621 kfree(mtd->eraseregions); 622 kfree(mtd); 623 kfree(cfi->cmdset_priv); 624 return NULL; 625 } 626 627 static int cfi_intelext_partition_fixup(struct mtd_info *mtd, 628 struct cfi_private **pcfi) 629 { 630 struct map_info *map = mtd->priv; 631 struct cfi_private *cfi = *pcfi; 632 struct cfi_pri_intelext *extp = cfi->cmdset_priv; 633 634 /* 635 * Probing of multi-partition flash chips. 636 * 637 * To support multiple partitions when available, we simply arrange 638 * for each of them to have their own flchip structure even if they 639 * are on the same physical chip. This means completely recreating 640 * a new cfi_private structure right here which is a blatent code 641 * layering violation, but this is still the least intrusive 642 * arrangement at this point. This can be rearranged in the future 643 * if someone feels motivated enough. --nico 644 */ 645 if (extp && extp->MajorVersion == '1' && extp->MinorVersion >= '3' 646 && extp->FeatureSupport & (1 << 9)) { 647 struct cfi_private *newcfi; 648 struct flchip *chip; 649 struct flchip_shared *shared; 650 int offs, numregions, numparts, partshift, numvirtchips, i, j; 651 652 /* Protection Register info */ 653 offs = (extp->NumProtectionFields - 1) * 654 sizeof(struct cfi_intelext_otpinfo); 655 656 /* Burst Read info */ 657 offs += extp->extra[offs+1]+2; 658 659 /* Number of partition regions */ 660 numregions = extp->extra[offs]; 661 offs += 1; 662 663 /* skip the sizeof(partregion) field in CFI 1.4 */ 664 if (extp->MinorVersion >= '4') 665 offs += 2; 666 667 /* Number of hardware partitions */ 668 numparts = 0; 669 for (i = 0; i < numregions; i++) { 670 struct cfi_intelext_regioninfo *rinfo; 671 rinfo = (struct cfi_intelext_regioninfo *)&extp->extra[offs]; 672 numparts += rinfo->NumIdentPartitions; 673 offs += sizeof(*rinfo) 674 + (rinfo->NumBlockTypes - 1) * 675 sizeof(struct cfi_intelext_blockinfo); 676 } 677 678 if (!numparts) 679 numparts = 1; 680 681 /* Programming Region info */ 682 if (extp->MinorVersion >= '4') { 683 struct cfi_intelext_programming_regioninfo *prinfo; 684 prinfo = (struct cfi_intelext_programming_regioninfo *)&extp->extra[offs]; 685 mtd->writesize = cfi->interleave << prinfo->ProgRegShift; 686 mtd->flags &= ~MTD_BIT_WRITEABLE; 687 printk(KERN_DEBUG "%s: program region size/ctrl_valid/ctrl_inval = %d/%d/%d\n", 688 map->name, mtd->writesize, 689 cfi->interleave * prinfo->ControlValid, 690 cfi->interleave * prinfo->ControlInvalid); 691 } 692 693 /* 694 * All functions below currently rely on all chips having 695 * the same geometry so we'll just assume that all hardware 696 * partitions are of the same size too. 697 */ 698 partshift = cfi->chipshift - __ffs(numparts); 699 700 if ((1 << partshift) < mtd->erasesize) { 701 printk( KERN_ERR 702 "%s: bad number of hw partitions (%d)\n", 703 __func__, numparts); 704 return -EINVAL; 705 } 706 707 numvirtchips = cfi->numchips * numparts; 708 newcfi = kmalloc(sizeof(struct cfi_private) + numvirtchips * sizeof(struct flchip), GFP_KERNEL); 709 if (!newcfi) 710 return -ENOMEM; 711 shared = kmalloc(sizeof(struct flchip_shared) * cfi->numchips, GFP_KERNEL); 712 if (!shared) { 713 kfree(newcfi); 714 return -ENOMEM; 715 } 716 memcpy(newcfi, cfi, sizeof(struct cfi_private)); 717 newcfi->numchips = numvirtchips; 718 newcfi->chipshift = partshift; 719 720 chip = &newcfi->chips[0]; 721 for (i = 0; i < cfi->numchips; i++) { 722 shared[i].writing = shared[i].erasing = NULL; 723 mutex_init(&shared[i].lock); 724 for (j = 0; j < numparts; j++) { 725 *chip = cfi->chips[i]; 726 chip->start += j << partshift; 727 chip->priv = &shared[i]; 728 /* those should be reset too since 729 they create memory references. */ 730 init_waitqueue_head(&chip->wq); 731 mutex_init(&chip->mutex); 732 chip++; 733 } 734 } 735 736 printk(KERN_DEBUG "%s: %d set(s) of %d interleaved chips " 737 "--> %d partitions of %d KiB\n", 738 map->name, cfi->numchips, cfi->interleave, 739 newcfi->numchips, 1<<(newcfi->chipshift-10)); 740 741 map->fldrv_priv = newcfi; 742 *pcfi = newcfi; 743 kfree(cfi); 744 } 745 746 return 0; 747 } 748 749 /* 750 * *********** CHIP ACCESS FUNCTIONS *********** 751 */ 752 static int chip_ready (struct map_info *map, struct flchip *chip, unsigned long adr, int mode) 753 { 754 DECLARE_WAITQUEUE(wait, current); 755 struct cfi_private *cfi = map->fldrv_priv; 756 map_word status, status_OK = CMD(0x80), status_PWS = CMD(0x01); 757 struct cfi_pri_intelext *cfip = cfi->cmdset_priv; 758 unsigned long timeo = jiffies + HZ; 759 760 /* Prevent setting state FL_SYNCING for chip in suspended state. */ 761 if (mode == FL_SYNCING && chip->oldstate != FL_READY) 762 goto sleep; 763 764 switch (chip->state) { 765 766 case FL_STATUS: 767 for (;;) { 768 status = map_read(map, adr); 769 if (map_word_andequal(map, status, status_OK, status_OK)) 770 break; 771 772 /* At this point we're fine with write operations 773 in other partitions as they don't conflict. */ 774 if (chip->priv && map_word_andequal(map, status, status_PWS, status_PWS)) 775 break; 776 777 mutex_unlock(&chip->mutex); 778 cfi_udelay(1); 779 mutex_lock(&chip->mutex); 780 /* Someone else might have been playing with it. */ 781 return -EAGAIN; 782 } 783 /* Fall through */ 784 case FL_READY: 785 case FL_CFI_QUERY: 786 case FL_JEDEC_QUERY: 787 return 0; 788 789 case FL_ERASING: 790 if (!cfip || 791 !(cfip->FeatureSupport & 2) || 792 !(mode == FL_READY || mode == FL_POINT || 793 (mode == FL_WRITING && (cfip->SuspendCmdSupport & 1)))) 794 goto sleep; 795 796 797 /* Erase suspend */ 798 map_write(map, CMD(0xB0), adr); 799 800 /* If the flash has finished erasing, then 'erase suspend' 801 * appears to make some (28F320) flash devices switch to 802 * 'read' mode. Make sure that we switch to 'read status' 803 * mode so we get the right data. --rmk 804 */ 805 map_write(map, CMD(0x70), adr); 806 chip->oldstate = FL_ERASING; 807 chip->state = FL_ERASE_SUSPENDING; 808 chip->erase_suspended = 1; 809 for (;;) { 810 status = map_read(map, adr); 811 if (map_word_andequal(map, status, status_OK, status_OK)) 812 break; 813 814 if (time_after(jiffies, timeo)) { 815 /* Urgh. Resume and pretend we weren't here. */ 816 map_write(map, CMD(0xd0), adr); 817 /* Make sure we're in 'read status' mode if it had finished */ 818 map_write(map, CMD(0x70), adr); 819 chip->state = FL_ERASING; 820 chip->oldstate = FL_READY; 821 printk(KERN_ERR "%s: Chip not ready after erase " 822 "suspended: status = 0x%lx\n", map->name, status.x[0]); 823 return -EIO; 824 } 825 826 mutex_unlock(&chip->mutex); 827 cfi_udelay(1); 828 mutex_lock(&chip->mutex); 829 /* Nobody will touch it while it's in state FL_ERASE_SUSPENDING. 830 So we can just loop here. */ 831 } 832 chip->state = FL_STATUS; 833 return 0; 834 835 case FL_XIP_WHILE_ERASING: 836 if (mode != FL_READY && mode != FL_POINT && 837 (mode != FL_WRITING || !cfip || !(cfip->SuspendCmdSupport&1))) 838 goto sleep; 839 chip->oldstate = chip->state; 840 chip->state = FL_READY; 841 return 0; 842 843 case FL_SHUTDOWN: 844 /* The machine is rebooting now,so no one can get chip anymore */ 845 return -EIO; 846 case FL_POINT: 847 /* Only if there's no operation suspended... */ 848 if (mode == FL_READY && chip->oldstate == FL_READY) 849 return 0; 850 /* Fall through */ 851 default: 852 sleep: 853 set_current_state(TASK_UNINTERRUPTIBLE); 854 add_wait_queue(&chip->wq, &wait); 855 mutex_unlock(&chip->mutex); 856 schedule(); 857 remove_wait_queue(&chip->wq, &wait); 858 mutex_lock(&chip->mutex); 859 return -EAGAIN; 860 } 861 } 862 863 static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode) 864 { 865 int ret; 866 DECLARE_WAITQUEUE(wait, current); 867 868 retry: 869 if (chip->priv && 870 (mode == FL_WRITING || mode == FL_ERASING || mode == FL_OTP_WRITE 871 || mode == FL_SHUTDOWN) && chip->state != FL_SYNCING) { 872 /* 873 * OK. We have possibility for contention on the write/erase 874 * operations which are global to the real chip and not per 875 * partition. So let's fight it over in the partition which 876 * currently has authority on the operation. 877 * 878 * The rules are as follows: 879 * 880 * - any write operation must own shared->writing. 881 * 882 * - any erase operation must own _both_ shared->writing and 883 * shared->erasing. 884 * 885 * - contention arbitration is handled in the owner's context. 886 * 887 * The 'shared' struct can be read and/or written only when 888 * its lock is taken. 889 */ 890 struct flchip_shared *shared = chip->priv; 891 struct flchip *contender; 892 mutex_lock(&shared->lock); 893 contender = shared->writing; 894 if (contender && contender != chip) { 895 /* 896 * The engine to perform desired operation on this 897 * partition is already in use by someone else. 898 * Let's fight over it in the context of the chip 899 * currently using it. If it is possible to suspend, 900 * that other partition will do just that, otherwise 901 * it'll happily send us to sleep. In any case, when 902 * get_chip returns success we're clear to go ahead. 903 */ 904 ret = mutex_trylock(&contender->mutex); 905 mutex_unlock(&shared->lock); 906 if (!ret) 907 goto retry; 908 mutex_unlock(&chip->mutex); 909 ret = chip_ready(map, contender, contender->start, mode); 910 mutex_lock(&chip->mutex); 911 912 if (ret == -EAGAIN) { 913 mutex_unlock(&contender->mutex); 914 goto retry; 915 } 916 if (ret) { 917 mutex_unlock(&contender->mutex); 918 return ret; 919 } 920 mutex_lock(&shared->lock); 921 922 /* We should not own chip if it is already 923 * in FL_SYNCING state. Put contender and retry. */ 924 if (chip->state == FL_SYNCING) { 925 put_chip(map, contender, contender->start); 926 mutex_unlock(&contender->mutex); 927 goto retry; 928 } 929 mutex_unlock(&contender->mutex); 930 } 931 932 /* Check if we already have suspended erase 933 * on this chip. Sleep. */ 934 if (mode == FL_ERASING && shared->erasing 935 && shared->erasing->oldstate == FL_ERASING) { 936 mutex_unlock(&shared->lock); 937 set_current_state(TASK_UNINTERRUPTIBLE); 938 add_wait_queue(&chip->wq, &wait); 939 mutex_unlock(&chip->mutex); 940 schedule(); 941 remove_wait_queue(&chip->wq, &wait); 942 mutex_lock(&chip->mutex); 943 goto retry; 944 } 945 946 /* We now own it */ 947 shared->writing = chip; 948 if (mode == FL_ERASING) 949 shared->erasing = chip; 950 mutex_unlock(&shared->lock); 951 } 952 ret = chip_ready(map, chip, adr, mode); 953 if (ret == -EAGAIN) 954 goto retry; 955 956 return ret; 957 } 958 959 static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr) 960 { 961 struct cfi_private *cfi = map->fldrv_priv; 962 963 if (chip->priv) { 964 struct flchip_shared *shared = chip->priv; 965 mutex_lock(&shared->lock); 966 if (shared->writing == chip && chip->oldstate == FL_READY) { 967 /* We own the ability to write, but we're done */ 968 shared->writing = shared->erasing; 969 if (shared->writing && shared->writing != chip) { 970 /* give back ownership to who we loaned it from */ 971 struct flchip *loaner = shared->writing; 972 mutex_lock(&loaner->mutex); 973 mutex_unlock(&shared->lock); 974 mutex_unlock(&chip->mutex); 975 put_chip(map, loaner, loaner->start); 976 mutex_lock(&chip->mutex); 977 mutex_unlock(&loaner->mutex); 978 wake_up(&chip->wq); 979 return; 980 } 981 shared->erasing = NULL; 982 shared->writing = NULL; 983 } else if (shared->erasing == chip && shared->writing != chip) { 984 /* 985 * We own the ability to erase without the ability 986 * to write, which means the erase was suspended 987 * and some other partition is currently writing. 988 * Don't let the switch below mess things up since 989 * we don't have ownership to resume anything. 990 */ 991 mutex_unlock(&shared->lock); 992 wake_up(&chip->wq); 993 return; 994 } 995 mutex_unlock(&shared->lock); 996 } 997 998 switch(chip->oldstate) { 999 case FL_ERASING: 1000 chip->state = chip->oldstate; 1001 /* What if one interleaved chip has finished and the 1002 other hasn't? The old code would leave the finished 1003 one in READY mode. That's bad, and caused -EROFS 1004 errors to be returned from do_erase_oneblock because 1005 that's the only bit it checked for at the time. 1006 As the state machine appears to explicitly allow 1007 sending the 0x70 (Read Status) command to an erasing 1008 chip and expecting it to be ignored, that's what we 1009 do. */ 1010 map_write(map, CMD(0xd0), adr); 1011 map_write(map, CMD(0x70), adr); 1012 chip->oldstate = FL_READY; 1013 chip->state = FL_ERASING; 1014 break; 1015 1016 case FL_XIP_WHILE_ERASING: 1017 chip->state = chip->oldstate; 1018 chip->oldstate = FL_READY; 1019 break; 1020 1021 case FL_READY: 1022 case FL_STATUS: 1023 case FL_JEDEC_QUERY: 1024 /* We should really make set_vpp() count, rather than doing this */ 1025 DISABLE_VPP(map); 1026 break; 1027 default: 1028 printk(KERN_ERR "%s: put_chip() called with oldstate %d!!\n", map->name, chip->oldstate); 1029 } 1030 wake_up(&chip->wq); 1031 } 1032 1033 #ifdef CONFIG_MTD_XIP 1034 1035 /* 1036 * No interrupt what so ever can be serviced while the flash isn't in array 1037 * mode. This is ensured by the xip_disable() and xip_enable() functions 1038 * enclosing any code path where the flash is known not to be in array mode. 1039 * And within a XIP disabled code path, only functions marked with __xipram 1040 * may be called and nothing else (it's a good thing to inspect generated 1041 * assembly to make sure inline functions were actually inlined and that gcc 1042 * didn't emit calls to its own support functions). Also configuring MTD CFI 1043 * support to a single buswidth and a single interleave is also recommended. 1044 */ 1045 1046 static void xip_disable(struct map_info *map, struct flchip *chip, 1047 unsigned long adr) 1048 { 1049 /* TODO: chips with no XIP use should ignore and return */ 1050 (void) map_read(map, adr); /* ensure mmu mapping is up to date */ 1051 local_irq_disable(); 1052 } 1053 1054 static void __xipram xip_enable(struct map_info *map, struct flchip *chip, 1055 unsigned long adr) 1056 { 1057 struct cfi_private *cfi = map->fldrv_priv; 1058 if (chip->state != FL_POINT && chip->state != FL_READY) { 1059 map_write(map, CMD(0xff), adr); 1060 chip->state = FL_READY; 1061 } 1062 (void) map_read(map, adr); 1063 xip_iprefetch(); 1064 local_irq_enable(); 1065 } 1066 1067 /* 1068 * When a delay is required for the flash operation to complete, the 1069 * xip_wait_for_operation() function is polling for both the given timeout 1070 * and pending (but still masked) hardware interrupts. Whenever there is an 1071 * interrupt pending then the flash erase or write operation is suspended, 1072 * array mode restored and interrupts unmasked. Task scheduling might also 1073 * happen at that point. The CPU eventually returns from the interrupt or 1074 * the call to schedule() and the suspended flash operation is resumed for 1075 * the remaining of the delay period. 1076 * 1077 * Warning: this function _will_ fool interrupt latency tracing tools. 1078 */ 1079 1080 static int __xipram xip_wait_for_operation( 1081 struct map_info *map, struct flchip *chip, 1082 unsigned long adr, unsigned int chip_op_time_max) 1083 { 1084 struct cfi_private *cfi = map->fldrv_priv; 1085 struct cfi_pri_intelext *cfip = cfi->cmdset_priv; 1086 map_word status, OK = CMD(0x80); 1087 unsigned long usec, suspended, start, done; 1088 flstate_t oldstate, newstate; 1089 1090 start = xip_currtime(); 1091 usec = chip_op_time_max; 1092 if (usec == 0) 1093 usec = 500000; 1094 done = 0; 1095 1096 do { 1097 cpu_relax(); 1098 if (xip_irqpending() && cfip && 1099 ((chip->state == FL_ERASING && (cfip->FeatureSupport&2)) || 1100 (chip->state == FL_WRITING && (cfip->FeatureSupport&4))) && 1101 (cfi_interleave_is_1(cfi) || chip->oldstate == FL_READY)) { 1102 /* 1103 * Let's suspend the erase or write operation when 1104 * supported. Note that we currently don't try to 1105 * suspend interleaved chips if there is already 1106 * another operation suspended (imagine what happens 1107 * when one chip was already done with the current 1108 * operation while another chip suspended it, then 1109 * we resume the whole thing at once). Yes, it 1110 * can happen! 1111 */ 1112 usec -= done; 1113 map_write(map, CMD(0xb0), adr); 1114 map_write(map, CMD(0x70), adr); 1115 suspended = xip_currtime(); 1116 do { 1117 if (xip_elapsed_since(suspended) > 100000) { 1118 /* 1119 * The chip doesn't want to suspend 1120 * after waiting for 100 msecs. 1121 * This is a critical error but there 1122 * is not much we can do here. 1123 */ 1124 return -EIO; 1125 } 1126 status = map_read(map, adr); 1127 } while (!map_word_andequal(map, status, OK, OK)); 1128 1129 /* Suspend succeeded */ 1130 oldstate = chip->state; 1131 if (oldstate == FL_ERASING) { 1132 if (!map_word_bitsset(map, status, CMD(0x40))) 1133 break; 1134 newstate = FL_XIP_WHILE_ERASING; 1135 chip->erase_suspended = 1; 1136 } else { 1137 if (!map_word_bitsset(map, status, CMD(0x04))) 1138 break; 1139 newstate = FL_XIP_WHILE_WRITING; 1140 chip->write_suspended = 1; 1141 } 1142 chip->state = newstate; 1143 map_write(map, CMD(0xff), adr); 1144 (void) map_read(map, adr); 1145 xip_iprefetch(); 1146 local_irq_enable(); 1147 mutex_unlock(&chip->mutex); 1148 xip_iprefetch(); 1149 cond_resched(); 1150 1151 /* 1152 * We're back. However someone else might have 1153 * decided to go write to the chip if we are in 1154 * a suspended erase state. If so let's wait 1155 * until it's done. 1156 */ 1157 mutex_lock(&chip->mutex); 1158 while (chip->state != newstate) { 1159 DECLARE_WAITQUEUE(wait, current); 1160 set_current_state(TASK_UNINTERRUPTIBLE); 1161 add_wait_queue(&chip->wq, &wait); 1162 mutex_unlock(&chip->mutex); 1163 schedule(); 1164 remove_wait_queue(&chip->wq, &wait); 1165 mutex_lock(&chip->mutex); 1166 } 1167 /* Disallow XIP again */ 1168 local_irq_disable(); 1169 1170 /* Resume the write or erase operation */ 1171 map_write(map, CMD(0xd0), adr); 1172 map_write(map, CMD(0x70), adr); 1173 chip->state = oldstate; 1174 start = xip_currtime(); 1175 } else if (usec >= 1000000/HZ) { 1176 /* 1177 * Try to save on CPU power when waiting delay 1178 * is at least a system timer tick period. 1179 * No need to be extremely accurate here. 1180 */ 1181 xip_cpu_idle(); 1182 } 1183 status = map_read(map, adr); 1184 done = xip_elapsed_since(start); 1185 } while (!map_word_andequal(map, status, OK, OK) 1186 && done < usec); 1187 1188 return (done >= usec) ? -ETIME : 0; 1189 } 1190 1191 /* 1192 * The INVALIDATE_CACHED_RANGE() macro is normally used in parallel while 1193 * the flash is actively programming or erasing since we have to poll for 1194 * the operation to complete anyway. We can't do that in a generic way with 1195 * a XIP setup so do it before the actual flash operation in this case 1196 * and stub it out from INVAL_CACHE_AND_WAIT. 1197 */ 1198 #define XIP_INVAL_CACHED_RANGE(map, from, size) \ 1199 INVALIDATE_CACHED_RANGE(map, from, size) 1200 1201 #define INVAL_CACHE_AND_WAIT(map, chip, cmd_adr, inval_adr, inval_len, usec, usec_max) \ 1202 xip_wait_for_operation(map, chip, cmd_adr, usec_max) 1203 1204 #else 1205 1206 #define xip_disable(map, chip, adr) 1207 #define xip_enable(map, chip, adr) 1208 #define XIP_INVAL_CACHED_RANGE(x...) 1209 #define INVAL_CACHE_AND_WAIT inval_cache_and_wait_for_operation 1210 1211 static int inval_cache_and_wait_for_operation( 1212 struct map_info *map, struct flchip *chip, 1213 unsigned long cmd_adr, unsigned long inval_adr, int inval_len, 1214 unsigned int chip_op_time, unsigned int chip_op_time_max) 1215 { 1216 struct cfi_private *cfi = map->fldrv_priv; 1217 map_word status, status_OK = CMD(0x80); 1218 int chip_state = chip->state; 1219 unsigned int timeo, sleep_time, reset_timeo; 1220 1221 mutex_unlock(&chip->mutex); 1222 if (inval_len) 1223 INVALIDATE_CACHED_RANGE(map, inval_adr, inval_len); 1224 mutex_lock(&chip->mutex); 1225 1226 timeo = chip_op_time_max; 1227 if (!timeo) 1228 timeo = 500000; 1229 reset_timeo = timeo; 1230 sleep_time = chip_op_time / 2; 1231 1232 for (;;) { 1233 if (chip->state != chip_state) { 1234 /* Someone's suspended the operation: sleep */ 1235 DECLARE_WAITQUEUE(wait, current); 1236 set_current_state(TASK_UNINTERRUPTIBLE); 1237 add_wait_queue(&chip->wq, &wait); 1238 mutex_unlock(&chip->mutex); 1239 schedule(); 1240 remove_wait_queue(&chip->wq, &wait); 1241 mutex_lock(&chip->mutex); 1242 continue; 1243 } 1244 1245 status = map_read(map, cmd_adr); 1246 if (map_word_andequal(map, status, status_OK, status_OK)) 1247 break; 1248 1249 if (chip->erase_suspended && chip_state == FL_ERASING) { 1250 /* Erase suspend occurred while sleep: reset timeout */ 1251 timeo = reset_timeo; 1252 chip->erase_suspended = 0; 1253 } 1254 if (chip->write_suspended && chip_state == FL_WRITING) { 1255 /* Write suspend occurred while sleep: reset timeout */ 1256 timeo = reset_timeo; 1257 chip->write_suspended = 0; 1258 } 1259 if (!timeo) { 1260 map_write(map, CMD(0x70), cmd_adr); 1261 chip->state = FL_STATUS; 1262 return -ETIME; 1263 } 1264 1265 /* OK Still waiting. Drop the lock, wait a while and retry. */ 1266 mutex_unlock(&chip->mutex); 1267 if (sleep_time >= 1000000/HZ) { 1268 /* 1269 * Half of the normal delay still remaining 1270 * can be performed with a sleeping delay instead 1271 * of busy waiting. 1272 */ 1273 msleep(sleep_time/1000); 1274 timeo -= sleep_time; 1275 sleep_time = 1000000/HZ; 1276 } else { 1277 udelay(1); 1278 cond_resched(); 1279 timeo--; 1280 } 1281 mutex_lock(&chip->mutex); 1282 } 1283 1284 /* Done and happy. */ 1285 chip->state = FL_STATUS; 1286 return 0; 1287 } 1288 1289 #endif 1290 1291 #define WAIT_TIMEOUT(map, chip, adr, udelay, udelay_max) \ 1292 INVAL_CACHE_AND_WAIT(map, chip, adr, 0, 0, udelay, udelay_max); 1293 1294 1295 static int do_point_onechip (struct map_info *map, struct flchip *chip, loff_t adr, size_t len) 1296 { 1297 unsigned long cmd_addr; 1298 struct cfi_private *cfi = map->fldrv_priv; 1299 int ret = 0; 1300 1301 adr += chip->start; 1302 1303 /* Ensure cmd read/writes are aligned. */ 1304 cmd_addr = adr & ~(map_bankwidth(map)-1); 1305 1306 mutex_lock(&chip->mutex); 1307 1308 ret = get_chip(map, chip, cmd_addr, FL_POINT); 1309 1310 if (!ret) { 1311 if (chip->state != FL_POINT && chip->state != FL_READY) 1312 map_write(map, CMD(0xff), cmd_addr); 1313 1314 chip->state = FL_POINT; 1315 chip->ref_point_counter++; 1316 } 1317 mutex_unlock(&chip->mutex); 1318 1319 return ret; 1320 } 1321 1322 static int cfi_intelext_point(struct mtd_info *mtd, loff_t from, size_t len, 1323 size_t *retlen, void **virt, resource_size_t *phys) 1324 { 1325 struct map_info *map = mtd->priv; 1326 struct cfi_private *cfi = map->fldrv_priv; 1327 unsigned long ofs, last_end = 0; 1328 int chipnum; 1329 int ret = 0; 1330 1331 if (!map->virt || (from + len > mtd->size)) 1332 return -EINVAL; 1333 1334 /* Now lock the chip(s) to POINT state */ 1335 1336 /* ofs: offset within the first chip that the first read should start */ 1337 chipnum = (from >> cfi->chipshift); 1338 ofs = from - (chipnum << cfi->chipshift); 1339 1340 *virt = map->virt + cfi->chips[chipnum].start + ofs; 1341 *retlen = 0; 1342 if (phys) 1343 *phys = map->phys + cfi->chips[chipnum].start + ofs; 1344 1345 while (len) { 1346 unsigned long thislen; 1347 1348 if (chipnum >= cfi->numchips) 1349 break; 1350 1351 /* We cannot point across chips that are virtually disjoint */ 1352 if (!last_end) 1353 last_end = cfi->chips[chipnum].start; 1354 else if (cfi->chips[chipnum].start != last_end) 1355 break; 1356 1357 if ((len + ofs -1) >> cfi->chipshift) 1358 thislen = (1<<cfi->chipshift) - ofs; 1359 else 1360 thislen = len; 1361 1362 ret = do_point_onechip(map, &cfi->chips[chipnum], ofs, thislen); 1363 if (ret) 1364 break; 1365 1366 *retlen += thislen; 1367 len -= thislen; 1368 1369 ofs = 0; 1370 last_end += 1 << cfi->chipshift; 1371 chipnum++; 1372 } 1373 return 0; 1374 } 1375 1376 static void cfi_intelext_unpoint(struct mtd_info *mtd, loff_t from, size_t len) 1377 { 1378 struct map_info *map = mtd->priv; 1379 struct cfi_private *cfi = map->fldrv_priv; 1380 unsigned long ofs; 1381 int chipnum; 1382 1383 /* Now unlock the chip(s) POINT state */ 1384 1385 /* ofs: offset within the first chip that the first read should start */ 1386 chipnum = (from >> cfi->chipshift); 1387 ofs = from - (chipnum << cfi->chipshift); 1388 1389 while (len) { 1390 unsigned long thislen; 1391 struct flchip *chip; 1392 1393 chip = &cfi->chips[chipnum]; 1394 if (chipnum >= cfi->numchips) 1395 break; 1396 1397 if ((len + ofs -1) >> cfi->chipshift) 1398 thislen = (1<<cfi->chipshift) - ofs; 1399 else 1400 thislen = len; 1401 1402 mutex_lock(&chip->mutex); 1403 if (chip->state == FL_POINT) { 1404 chip->ref_point_counter--; 1405 if(chip->ref_point_counter == 0) 1406 chip->state = FL_READY; 1407 } else 1408 printk(KERN_ERR "%s: Warning: unpoint called on non pointed region\n", map->name); /* Should this give an error? */ 1409 1410 put_chip(map, chip, chip->start); 1411 mutex_unlock(&chip->mutex); 1412 1413 len -= thislen; 1414 ofs = 0; 1415 chipnum++; 1416 } 1417 } 1418 1419 static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) 1420 { 1421 unsigned long cmd_addr; 1422 struct cfi_private *cfi = map->fldrv_priv; 1423 int ret; 1424 1425 adr += chip->start; 1426 1427 /* Ensure cmd read/writes are aligned. */ 1428 cmd_addr = adr & ~(map_bankwidth(map)-1); 1429 1430 mutex_lock(&chip->mutex); 1431 ret = get_chip(map, chip, cmd_addr, FL_READY); 1432 if (ret) { 1433 mutex_unlock(&chip->mutex); 1434 return ret; 1435 } 1436 1437 if (chip->state != FL_POINT && chip->state != FL_READY) { 1438 map_write(map, CMD(0xff), cmd_addr); 1439 1440 chip->state = FL_READY; 1441 } 1442 1443 map_copy_from(map, buf, adr, len); 1444 1445 put_chip(map, chip, cmd_addr); 1446 1447 mutex_unlock(&chip->mutex); 1448 return 0; 1449 } 1450 1451 static int cfi_intelext_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) 1452 { 1453 struct map_info *map = mtd->priv; 1454 struct cfi_private *cfi = map->fldrv_priv; 1455 unsigned long ofs; 1456 int chipnum; 1457 int ret = 0; 1458 1459 /* ofs: offset within the first chip that the first read should start */ 1460 chipnum = (from >> cfi->chipshift); 1461 ofs = from - (chipnum << cfi->chipshift); 1462 1463 *retlen = 0; 1464 1465 while (len) { 1466 unsigned long thislen; 1467 1468 if (chipnum >= cfi->numchips) 1469 break; 1470 1471 if ((len + ofs -1) >> cfi->chipshift) 1472 thislen = (1<<cfi->chipshift) - ofs; 1473 else 1474 thislen = len; 1475 1476 ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); 1477 if (ret) 1478 break; 1479 1480 *retlen += thislen; 1481 len -= thislen; 1482 buf += thislen; 1483 1484 ofs = 0; 1485 chipnum++; 1486 } 1487 return ret; 1488 } 1489 1490 static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, 1491 unsigned long adr, map_word datum, int mode) 1492 { 1493 struct cfi_private *cfi = map->fldrv_priv; 1494 map_word status, write_cmd; 1495 int ret=0; 1496 1497 adr += chip->start; 1498 1499 switch (mode) { 1500 case FL_WRITING: 1501 write_cmd = (cfi->cfiq->P_ID != P_ID_INTEL_PERFORMANCE) ? CMD(0x40) : CMD(0x41); 1502 break; 1503 case FL_OTP_WRITE: 1504 write_cmd = CMD(0xc0); 1505 break; 1506 default: 1507 return -EINVAL; 1508 } 1509 1510 mutex_lock(&chip->mutex); 1511 ret = get_chip(map, chip, adr, mode); 1512 if (ret) { 1513 mutex_unlock(&chip->mutex); 1514 return ret; 1515 } 1516 1517 XIP_INVAL_CACHED_RANGE(map, adr, map_bankwidth(map)); 1518 ENABLE_VPP(map); 1519 xip_disable(map, chip, adr); 1520 map_write(map, write_cmd, adr); 1521 map_write(map, datum, adr); 1522 chip->state = mode; 1523 1524 ret = INVAL_CACHE_AND_WAIT(map, chip, adr, 1525 adr, map_bankwidth(map), 1526 chip->word_write_time, 1527 chip->word_write_time_max); 1528 if (ret) { 1529 xip_enable(map, chip, adr); 1530 printk(KERN_ERR "%s: word write error (status timeout)\n", map->name); 1531 goto out; 1532 } 1533 1534 /* check for errors */ 1535 status = map_read(map, adr); 1536 if (map_word_bitsset(map, status, CMD(0x1a))) { 1537 unsigned long chipstatus = MERGESTATUS(status); 1538 1539 /* reset status */ 1540 map_write(map, CMD(0x50), adr); 1541 map_write(map, CMD(0x70), adr); 1542 xip_enable(map, chip, adr); 1543 1544 if (chipstatus & 0x02) { 1545 ret = -EROFS; 1546 } else if (chipstatus & 0x08) { 1547 printk(KERN_ERR "%s: word write error (bad VPP)\n", map->name); 1548 ret = -EIO; 1549 } else { 1550 printk(KERN_ERR "%s: word write error (status 0x%lx)\n", map->name, chipstatus); 1551 ret = -EINVAL; 1552 } 1553 1554 goto out; 1555 } 1556 1557 xip_enable(map, chip, adr); 1558 out: put_chip(map, chip, adr); 1559 mutex_unlock(&chip->mutex); 1560 return ret; 1561 } 1562 1563 1564 static int cfi_intelext_write_words (struct mtd_info *mtd, loff_t to , size_t len, size_t *retlen, const u_char *buf) 1565 { 1566 struct map_info *map = mtd->priv; 1567 struct cfi_private *cfi = map->fldrv_priv; 1568 int ret = 0; 1569 int chipnum; 1570 unsigned long ofs; 1571 1572 *retlen = 0; 1573 if (!len) 1574 return 0; 1575 1576 chipnum = to >> cfi->chipshift; 1577 ofs = to - (chipnum << cfi->chipshift); 1578 1579 /* If it's not bus-aligned, do the first byte write */ 1580 if (ofs & (map_bankwidth(map)-1)) { 1581 unsigned long bus_ofs = ofs & ~(map_bankwidth(map)-1); 1582 int gap = ofs - bus_ofs; 1583 int n; 1584 map_word datum; 1585 1586 n = min_t(int, len, map_bankwidth(map)-gap); 1587 datum = map_word_ff(map); 1588 datum = map_word_load_partial(map, datum, buf, gap, n); 1589 1590 ret = do_write_oneword(map, &cfi->chips[chipnum], 1591 bus_ofs, datum, FL_WRITING); 1592 if (ret) 1593 return ret; 1594 1595 len -= n; 1596 ofs += n; 1597 buf += n; 1598 (*retlen) += n; 1599 1600 if (ofs >> cfi->chipshift) { 1601 chipnum ++; 1602 ofs = 0; 1603 if (chipnum == cfi->numchips) 1604 return 0; 1605 } 1606 } 1607 1608 while(len >= map_bankwidth(map)) { 1609 map_word datum = map_word_load(map, buf); 1610 1611 ret = do_write_oneword(map, &cfi->chips[chipnum], 1612 ofs, datum, FL_WRITING); 1613 if (ret) 1614 return ret; 1615 1616 ofs += map_bankwidth(map); 1617 buf += map_bankwidth(map); 1618 (*retlen) += map_bankwidth(map); 1619 len -= map_bankwidth(map); 1620 1621 if (ofs >> cfi->chipshift) { 1622 chipnum ++; 1623 ofs = 0; 1624 if (chipnum == cfi->numchips) 1625 return 0; 1626 } 1627 } 1628 1629 if (len & (map_bankwidth(map)-1)) { 1630 map_word datum; 1631 1632 datum = map_word_ff(map); 1633 datum = map_word_load_partial(map, datum, buf, 0, len); 1634 1635 ret = do_write_oneword(map, &cfi->chips[chipnum], 1636 ofs, datum, FL_WRITING); 1637 if (ret) 1638 return ret; 1639 1640 (*retlen) += len; 1641 } 1642 1643 return 0; 1644 } 1645 1646 1647 static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, 1648 unsigned long adr, const struct kvec **pvec, 1649 unsigned long *pvec_seek, int len) 1650 { 1651 struct cfi_private *cfi = map->fldrv_priv; 1652 map_word status, write_cmd, datum; 1653 unsigned long cmd_adr; 1654 int ret, wbufsize, word_gap, words; 1655 const struct kvec *vec; 1656 unsigned long vec_seek; 1657 unsigned long initial_adr; 1658 int initial_len = len; 1659 1660 wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; 1661 adr += chip->start; 1662 initial_adr = adr; 1663 cmd_adr = adr & ~(wbufsize-1); 1664 1665 /* Let's determine this according to the interleave only once */ 1666 write_cmd = (cfi->cfiq->P_ID != P_ID_INTEL_PERFORMANCE) ? CMD(0xe8) : CMD(0xe9); 1667 1668 mutex_lock(&chip->mutex); 1669 ret = get_chip(map, chip, cmd_adr, FL_WRITING); 1670 if (ret) { 1671 mutex_unlock(&chip->mutex); 1672 return ret; 1673 } 1674 1675 XIP_INVAL_CACHED_RANGE(map, initial_adr, initial_len); 1676 ENABLE_VPP(map); 1677 xip_disable(map, chip, cmd_adr); 1678 1679 /* §4.8 of the 28FxxxJ3A datasheet says "Any time SR.4 and/or SR.5 is set 1680 [...], the device will not accept any more Write to Buffer commands". 1681 So we must check here and reset those bits if they're set. Otherwise 1682 we're just pissing in the wind */ 1683 if (chip->state != FL_STATUS) { 1684 map_write(map, CMD(0x70), cmd_adr); 1685 chip->state = FL_STATUS; 1686 } 1687 status = map_read(map, cmd_adr); 1688 if (map_word_bitsset(map, status, CMD(0x30))) { 1689 xip_enable(map, chip, cmd_adr); 1690 printk(KERN_WARNING "SR.4 or SR.5 bits set in buffer write (status %lx). Clearing.\n", status.x[0]); 1691 xip_disable(map, chip, cmd_adr); 1692 map_write(map, CMD(0x50), cmd_adr); 1693 map_write(map, CMD(0x70), cmd_adr); 1694 } 1695 1696 chip->state = FL_WRITING_TO_BUFFER; 1697 map_write(map, write_cmd, cmd_adr); 1698 ret = WAIT_TIMEOUT(map, chip, cmd_adr, 0, 0); 1699 if (ret) { 1700 /* Argh. Not ready for write to buffer */ 1701 map_word Xstatus = map_read(map, cmd_adr); 1702 map_write(map, CMD(0x70), cmd_adr); 1703 chip->state = FL_STATUS; 1704 status = map_read(map, cmd_adr); 1705 map_write(map, CMD(0x50), cmd_adr); 1706 map_write(map, CMD(0x70), cmd_adr); 1707 xip_enable(map, chip, cmd_adr); 1708 printk(KERN_ERR "%s: Chip not ready for buffer write. Xstatus = %lx, status = %lx\n", 1709 map->name, Xstatus.x[0], status.x[0]); 1710 goto out; 1711 } 1712 1713 /* Figure out the number of words to write */ 1714 word_gap = (-adr & (map_bankwidth(map)-1)); 1715 words = DIV_ROUND_UP(len - word_gap, map_bankwidth(map)); 1716 if (!word_gap) { 1717 words--; 1718 } else { 1719 word_gap = map_bankwidth(map) - word_gap; 1720 adr -= word_gap; 1721 datum = map_word_ff(map); 1722 } 1723 1724 /* Write length of data to come */ 1725 map_write(map, CMD(words), cmd_adr ); 1726 1727 /* Write data */ 1728 vec = *pvec; 1729 vec_seek = *pvec_seek; 1730 do { 1731 int n = map_bankwidth(map) - word_gap; 1732 if (n > vec->iov_len - vec_seek) 1733 n = vec->iov_len - vec_seek; 1734 if (n > len) 1735 n = len; 1736 1737 if (!word_gap && len < map_bankwidth(map)) 1738 datum = map_word_ff(map); 1739 1740 datum = map_word_load_partial(map, datum, 1741 vec->iov_base + vec_seek, 1742 word_gap, n); 1743 1744 len -= n; 1745 word_gap += n; 1746 if (!len || word_gap == map_bankwidth(map)) { 1747 map_write(map, datum, adr); 1748 adr += map_bankwidth(map); 1749 word_gap = 0; 1750 } 1751 1752 vec_seek += n; 1753 if (vec_seek == vec->iov_len) { 1754 vec++; 1755 vec_seek = 0; 1756 } 1757 } while (len); 1758 *pvec = vec; 1759 *pvec_seek = vec_seek; 1760 1761 /* GO GO GO */ 1762 map_write(map, CMD(0xd0), cmd_adr); 1763 chip->state = FL_WRITING; 1764 1765 ret = INVAL_CACHE_AND_WAIT(map, chip, cmd_adr, 1766 initial_adr, initial_len, 1767 chip->buffer_write_time, 1768 chip->buffer_write_time_max); 1769 if (ret) { 1770 map_write(map, CMD(0x70), cmd_adr); 1771 chip->state = FL_STATUS; 1772 xip_enable(map, chip, cmd_adr); 1773 printk(KERN_ERR "%s: buffer write error (status timeout)\n", map->name); 1774 goto out; 1775 } 1776 1777 /* check for errors */ 1778 status = map_read(map, cmd_adr); 1779 if (map_word_bitsset(map, status, CMD(0x1a))) { 1780 unsigned long chipstatus = MERGESTATUS(status); 1781 1782 /* reset status */ 1783 map_write(map, CMD(0x50), cmd_adr); 1784 map_write(map, CMD(0x70), cmd_adr); 1785 xip_enable(map, chip, cmd_adr); 1786 1787 if (chipstatus & 0x02) { 1788 ret = -EROFS; 1789 } else if (chipstatus & 0x08) { 1790 printk(KERN_ERR "%s: buffer write error (bad VPP)\n", map->name); 1791 ret = -EIO; 1792 } else { 1793 printk(KERN_ERR "%s: buffer write error (status 0x%lx)\n", map->name, chipstatus); 1794 ret = -EINVAL; 1795 } 1796 1797 goto out; 1798 } 1799 1800 xip_enable(map, chip, cmd_adr); 1801 out: put_chip(map, chip, cmd_adr); 1802 mutex_unlock(&chip->mutex); 1803 return ret; 1804 } 1805 1806 static int cfi_intelext_writev (struct mtd_info *mtd, const struct kvec *vecs, 1807 unsigned long count, loff_t to, size_t *retlen) 1808 { 1809 struct map_info *map = mtd->priv; 1810 struct cfi_private *cfi = map->fldrv_priv; 1811 int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; 1812 int ret = 0; 1813 int chipnum; 1814 unsigned long ofs, vec_seek, i; 1815 size_t len = 0; 1816 1817 for (i = 0; i < count; i++) 1818 len += vecs[i].iov_len; 1819 1820 *retlen = 0; 1821 if (!len) 1822 return 0; 1823 1824 chipnum = to >> cfi->chipshift; 1825 ofs = to - (chipnum << cfi->chipshift); 1826 vec_seek = 0; 1827 1828 do { 1829 /* We must not cross write block boundaries */ 1830 int size = wbufsize - (ofs & (wbufsize-1)); 1831 1832 if (size > len) 1833 size = len; 1834 ret = do_write_buffer(map, &cfi->chips[chipnum], 1835 ofs, &vecs, &vec_seek, size); 1836 if (ret) 1837 return ret; 1838 1839 ofs += size; 1840 (*retlen) += size; 1841 len -= size; 1842 1843 if (ofs >> cfi->chipshift) { 1844 chipnum ++; 1845 ofs = 0; 1846 if (chipnum == cfi->numchips) 1847 return 0; 1848 } 1849 1850 /* Be nice and reschedule with the chip in a usable state for other 1851 processes. */ 1852 cond_resched(); 1853 1854 } while (len); 1855 1856 return 0; 1857 } 1858 1859 static int cfi_intelext_write_buffers (struct mtd_info *mtd, loff_t to, 1860 size_t len, size_t *retlen, const u_char *buf) 1861 { 1862 struct kvec vec; 1863 1864 vec.iov_base = (void *) buf; 1865 vec.iov_len = len; 1866 1867 return cfi_intelext_writev(mtd, &vec, 1, to, retlen); 1868 } 1869 1870 static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, 1871 unsigned long adr, int len, void *thunk) 1872 { 1873 struct cfi_private *cfi = map->fldrv_priv; 1874 map_word status; 1875 int retries = 3; 1876 int ret; 1877 1878 adr += chip->start; 1879 1880 retry: 1881 mutex_lock(&chip->mutex); 1882 ret = get_chip(map, chip, adr, FL_ERASING); 1883 if (ret) { 1884 mutex_unlock(&chip->mutex); 1885 return ret; 1886 } 1887 1888 XIP_INVAL_CACHED_RANGE(map, adr, len); 1889 ENABLE_VPP(map); 1890 xip_disable(map, chip, adr); 1891 1892 /* Clear the status register first */ 1893 map_write(map, CMD(0x50), adr); 1894 1895 /* Now erase */ 1896 map_write(map, CMD(0x20), adr); 1897 map_write(map, CMD(0xD0), adr); 1898 chip->state = FL_ERASING; 1899 chip->erase_suspended = 0; 1900 1901 ret = INVAL_CACHE_AND_WAIT(map, chip, adr, 1902 adr, len, 1903 chip->erase_time, 1904 chip->erase_time_max); 1905 if (ret) { 1906 map_write(map, CMD(0x70), adr); 1907 chip->state = FL_STATUS; 1908 xip_enable(map, chip, adr); 1909 printk(KERN_ERR "%s: block erase error: (status timeout)\n", map->name); 1910 goto out; 1911 } 1912 1913 /* We've broken this before. It doesn't hurt to be safe */ 1914 map_write(map, CMD(0x70), adr); 1915 chip->state = FL_STATUS; 1916 status = map_read(map, adr); 1917 1918 /* check for errors */ 1919 if (map_word_bitsset(map, status, CMD(0x3a))) { 1920 unsigned long chipstatus = MERGESTATUS(status); 1921 1922 /* Reset the error bits */ 1923 map_write(map, CMD(0x50), adr); 1924 map_write(map, CMD(0x70), adr); 1925 xip_enable(map, chip, adr); 1926 1927 if ((chipstatus & 0x30) == 0x30) { 1928 printk(KERN_ERR "%s: block erase error: (bad command sequence, status 0x%lx)\n", map->name, chipstatus); 1929 ret = -EINVAL; 1930 } else if (chipstatus & 0x02) { 1931 /* Protection bit set */ 1932 ret = -EROFS; 1933 } else if (chipstatus & 0x8) { 1934 /* Voltage */ 1935 printk(KERN_ERR "%s: block erase error: (bad VPP)\n", map->name); 1936 ret = -EIO; 1937 } else if (chipstatus & 0x20 && retries--) { 1938 printk(KERN_DEBUG "block erase failed at 0x%08lx: status 0x%lx. Retrying...\n", adr, chipstatus); 1939 put_chip(map, chip, adr); 1940 mutex_unlock(&chip->mutex); 1941 goto retry; 1942 } else { 1943 printk(KERN_ERR "%s: block erase failed at 0x%08lx (status 0x%lx)\n", map->name, adr, chipstatus); 1944 ret = -EIO; 1945 } 1946 1947 goto out; 1948 } 1949 1950 xip_enable(map, chip, adr); 1951 out: put_chip(map, chip, adr); 1952 mutex_unlock(&chip->mutex); 1953 return ret; 1954 } 1955 1956 static int cfi_intelext_erase_varsize(struct mtd_info *mtd, struct erase_info *instr) 1957 { 1958 unsigned long ofs, len; 1959 int ret; 1960 1961 ofs = instr->addr; 1962 len = instr->len; 1963 1964 ret = cfi_varsize_frob(mtd, do_erase_oneblock, ofs, len, NULL); 1965 if (ret) 1966 return ret; 1967 1968 instr->state = MTD_ERASE_DONE; 1969 mtd_erase_callback(instr); 1970 1971 return 0; 1972 } 1973 1974 static void cfi_intelext_sync (struct mtd_info *mtd) 1975 { 1976 struct map_info *map = mtd->priv; 1977 struct cfi_private *cfi = map->fldrv_priv; 1978 int i; 1979 struct flchip *chip; 1980 int ret = 0; 1981 1982 for (i=0; !ret && i<cfi->numchips; i++) { 1983 chip = &cfi->chips[i]; 1984 1985 mutex_lock(&chip->mutex); 1986 ret = get_chip(map, chip, chip->start, FL_SYNCING); 1987 1988 if (!ret) { 1989 chip->oldstate = chip->state; 1990 chip->state = FL_SYNCING; 1991 /* No need to wake_up() on this state change - 1992 * as the whole point is that nobody can do anything 1993 * with the chip now anyway. 1994 */ 1995 } 1996 mutex_unlock(&chip->mutex); 1997 } 1998 1999 /* Unlock the chips again */ 2000 2001 for (i--; i >=0; i--) { 2002 chip = &cfi->chips[i]; 2003 2004 mutex_lock(&chip->mutex); 2005 2006 if (chip->state == FL_SYNCING) { 2007 chip->state = chip->oldstate; 2008 chip->oldstate = FL_READY; 2009 wake_up(&chip->wq); 2010 } 2011 mutex_unlock(&chip->mutex); 2012 } 2013 } 2014 2015 static int __xipram do_getlockstatus_oneblock(struct map_info *map, 2016 struct flchip *chip, 2017 unsigned long adr, 2018 int len, void *thunk) 2019 { 2020 struct cfi_private *cfi = map->fldrv_priv; 2021 int status, ofs_factor = cfi->interleave * cfi->device_type; 2022 2023 adr += chip->start; 2024 xip_disable(map, chip, adr+(2*ofs_factor)); 2025 map_write(map, CMD(0x90), adr+(2*ofs_factor)); 2026 chip->state = FL_JEDEC_QUERY; 2027 status = cfi_read_query(map, adr+(2*ofs_factor)); 2028 xip_enable(map, chip, 0); 2029 return status; 2030 } 2031 2032 #ifdef DEBUG_LOCK_BITS 2033 static int __xipram do_printlockstatus_oneblock(struct map_info *map, 2034 struct flchip *chip, 2035 unsigned long adr, 2036 int len, void *thunk) 2037 { 2038 printk(KERN_DEBUG "block status register for 0x%08lx is %x\n", 2039 adr, do_getlockstatus_oneblock(map, chip, adr, len, thunk)); 2040 return 0; 2041 } 2042 #endif 2043 2044 #define DO_XXLOCK_ONEBLOCK_LOCK ((void *) 1) 2045 #define DO_XXLOCK_ONEBLOCK_UNLOCK ((void *) 2) 2046 2047 static int __xipram do_xxlock_oneblock(struct map_info *map, struct flchip *chip, 2048 unsigned long adr, int len, void *thunk) 2049 { 2050 struct cfi_private *cfi = map->fldrv_priv; 2051 struct cfi_pri_intelext *extp = cfi->cmdset_priv; 2052 int udelay; 2053 int ret; 2054 2055 adr += chip->start; 2056 2057 mutex_lock(&chip->mutex); 2058 ret = get_chip(map, chip, adr, FL_LOCKING); 2059 if (ret) { 2060 mutex_unlock(&chip->mutex); 2061 return ret; 2062 } 2063 2064 ENABLE_VPP(map); 2065 xip_disable(map, chip, adr); 2066 2067 map_write(map, CMD(0x60), adr); 2068 if (thunk == DO_XXLOCK_ONEBLOCK_LOCK) { 2069 map_write(map, CMD(0x01), adr); 2070 chip->state = FL_LOCKING; 2071 } else if (thunk == DO_XXLOCK_ONEBLOCK_UNLOCK) { 2072 map_write(map, CMD(0xD0), adr); 2073 chip->state = FL_UNLOCKING; 2074 } else 2075 BUG(); 2076 2077 /* 2078 * If Instant Individual Block Locking supported then no need 2079 * to delay. 2080 */ 2081 udelay = (!extp || !(extp->FeatureSupport & (1 << 5))) ? 1000000/HZ : 0; 2082 2083 ret = WAIT_TIMEOUT(map, chip, adr, udelay, udelay * 100); 2084 if (ret) { 2085 map_write(map, CMD(0x70), adr); 2086 chip->state = FL_STATUS; 2087 xip_enable(map, chip, adr); 2088 printk(KERN_ERR "%s: block unlock error: (status timeout)\n", map->name); 2089 goto out; 2090 } 2091 2092 xip_enable(map, chip, adr); 2093 out: put_chip(map, chip, adr); 2094 mutex_unlock(&chip->mutex); 2095 return ret; 2096 } 2097 2098 static int cfi_intelext_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) 2099 { 2100 int ret; 2101 2102 #ifdef DEBUG_LOCK_BITS 2103 printk(KERN_DEBUG "%s: lock status before, ofs=0x%08llx, len=0x%08X\n", 2104 __func__, ofs, len); 2105 cfi_varsize_frob(mtd, do_printlockstatus_oneblock, 2106 ofs, len, NULL); 2107 #endif 2108 2109 ret = cfi_varsize_frob(mtd, do_xxlock_oneblock, 2110 ofs, len, DO_XXLOCK_ONEBLOCK_LOCK); 2111 2112 #ifdef DEBUG_LOCK_BITS 2113 printk(KERN_DEBUG "%s: lock status after, ret=%d\n", 2114 __func__, ret); 2115 cfi_varsize_frob(mtd, do_printlockstatus_oneblock, 2116 ofs, len, NULL); 2117 #endif 2118 2119 return ret; 2120 } 2121 2122 static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) 2123 { 2124 int ret; 2125 2126 #ifdef DEBUG_LOCK_BITS 2127 printk(KERN_DEBUG "%s: lock status before, ofs=0x%08llx, len=0x%08X\n", 2128 __func__, ofs, len); 2129 cfi_varsize_frob(mtd, do_printlockstatus_oneblock, 2130 ofs, len, NULL); 2131 #endif 2132 2133 ret = cfi_varsize_frob(mtd, do_xxlock_oneblock, 2134 ofs, len, DO_XXLOCK_ONEBLOCK_UNLOCK); 2135 2136 #ifdef DEBUG_LOCK_BITS 2137 printk(KERN_DEBUG "%s: lock status after, ret=%d\n", 2138 __func__, ret); 2139 cfi_varsize_frob(mtd, do_printlockstatus_oneblock, 2140 ofs, len, NULL); 2141 #endif 2142 2143 return ret; 2144 } 2145 2146 static int cfi_intelext_is_locked(struct mtd_info *mtd, loff_t ofs, 2147 uint64_t len) 2148 { 2149 return cfi_varsize_frob(mtd, do_getlockstatus_oneblock, 2150 ofs, len, NULL) ? 1 : 0; 2151 } 2152 2153 #ifdef CONFIG_MTD_OTP 2154 2155 typedef int (*otp_op_t)(struct map_info *map, struct flchip *chip, 2156 u_long data_offset, u_char *buf, u_int size, 2157 u_long prot_offset, u_int groupno, u_int groupsize); 2158 2159 static int __xipram 2160 do_otp_read(struct map_info *map, struct flchip *chip, u_long offset, 2161 u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz) 2162 { 2163 struct cfi_private *cfi = map->fldrv_priv; 2164 int ret; 2165 2166 mutex_lock(&chip->mutex); 2167 ret = get_chip(map, chip, chip->start, FL_JEDEC_QUERY); 2168 if (ret) { 2169 mutex_unlock(&chip->mutex); 2170 return ret; 2171 } 2172 2173 /* let's ensure we're not reading back cached data from array mode */ 2174 INVALIDATE_CACHED_RANGE(map, chip->start + offset, size); 2175 2176 xip_disable(map, chip, chip->start); 2177 if (chip->state != FL_JEDEC_QUERY) { 2178 map_write(map, CMD(0x90), chip->start); 2179 chip->state = FL_JEDEC_QUERY; 2180 } 2181 map_copy_from(map, buf, chip->start + offset, size); 2182 xip_enable(map, chip, chip->start); 2183 2184 /* then ensure we don't keep OTP data in the cache */ 2185 INVALIDATE_CACHED_RANGE(map, chip->start + offset, size); 2186 2187 put_chip(map, chip, chip->start); 2188 mutex_unlock(&chip->mutex); 2189 return 0; 2190 } 2191 2192 static int 2193 do_otp_write(struct map_info *map, struct flchip *chip, u_long offset, 2194 u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz) 2195 { 2196 int ret; 2197 2198 while (size) { 2199 unsigned long bus_ofs = offset & ~(map_bankwidth(map)-1); 2200 int gap = offset - bus_ofs; 2201 int n = min_t(int, size, map_bankwidth(map)-gap); 2202 map_word datum = map_word_ff(map); 2203 2204 datum = map_word_load_partial(map, datum, buf, gap, n); 2205 ret = do_write_oneword(map, chip, bus_ofs, datum, FL_OTP_WRITE); 2206 if (ret) 2207 return ret; 2208 2209 offset += n; 2210 buf += n; 2211 size -= n; 2212 } 2213 2214 return 0; 2215 } 2216 2217 static int 2218 do_otp_lock(struct map_info *map, struct flchip *chip, u_long offset, 2219 u_char *buf, u_int size, u_long prot, u_int grpno, u_int grpsz) 2220 { 2221 struct cfi_private *cfi = map->fldrv_priv; 2222 map_word datum; 2223 2224 /* make sure area matches group boundaries */ 2225 if (size != grpsz) 2226 return -EXDEV; 2227 2228 datum = map_word_ff(map); 2229 datum = map_word_clr(map, datum, CMD(1 << grpno)); 2230 return do_write_oneword(map, chip, prot, datum, FL_OTP_WRITE); 2231 } 2232 2233 static int cfi_intelext_otp_walk(struct mtd_info *mtd, loff_t from, size_t len, 2234 size_t *retlen, u_char *buf, 2235 otp_op_t action, int user_regs) 2236 { 2237 struct map_info *map = mtd->priv; 2238 struct cfi_private *cfi = map->fldrv_priv; 2239 struct cfi_pri_intelext *extp = cfi->cmdset_priv; 2240 struct flchip *chip; 2241 struct cfi_intelext_otpinfo *otp; 2242 u_long devsize, reg_prot_offset, data_offset; 2243 u_int chip_num, chip_step, field, reg_fact_size, reg_user_size; 2244 u_int groups, groupno, groupsize, reg_fact_groups, reg_user_groups; 2245 int ret; 2246 2247 *retlen = 0; 2248 2249 /* Check that we actually have some OTP registers */ 2250 if (!extp || !(extp->FeatureSupport & 64) || !extp->NumProtectionFields) 2251 return -ENODATA; 2252 2253 /* we need real chips here not virtual ones */ 2254 devsize = (1 << cfi->cfiq->DevSize) * cfi->interleave; 2255 chip_step = devsize >> cfi->chipshift; 2256 chip_num = 0; 2257 2258 /* Some chips have OTP located in the _top_ partition only. 2259 For example: Intel 28F256L18T (T means top-parameter device) */ 2260 if (cfi->mfr == CFI_MFR_INTEL) { 2261 switch (cfi->id) { 2262 case 0x880b: 2263 case 0x880c: 2264 case 0x880d: 2265 chip_num = chip_step - 1; 2266 } 2267 } 2268 2269 for ( ; chip_num < cfi->numchips; chip_num += chip_step) { 2270 chip = &cfi->chips[chip_num]; 2271 otp = (struct cfi_intelext_otpinfo *)&extp->extra[0]; 2272 2273 /* first OTP region */ 2274 field = 0; 2275 reg_prot_offset = extp->ProtRegAddr; 2276 reg_fact_groups = 1; 2277 reg_fact_size = 1 << extp->FactProtRegSize; 2278 reg_user_groups = 1; 2279 reg_user_size = 1 << extp->UserProtRegSize; 2280 2281 while (len > 0) { 2282 /* flash geometry fixup */ 2283 data_offset = reg_prot_offset + 1; 2284 data_offset *= cfi->interleave * cfi->device_type; 2285 reg_prot_offset *= cfi->interleave * cfi->device_type; 2286 reg_fact_size *= cfi->interleave; 2287 reg_user_size *= cfi->interleave; 2288 2289 if (user_regs) { 2290 groups = reg_user_groups; 2291 groupsize = reg_user_size; 2292 /* skip over factory reg area */ 2293 groupno = reg_fact_groups; 2294 data_offset += reg_fact_groups * reg_fact_size; 2295 } else { 2296 groups = reg_fact_groups; 2297 groupsize = reg_fact_size; 2298 groupno = 0; 2299 } 2300 2301 while (len > 0 && groups > 0) { 2302 if (!action) { 2303 /* 2304 * Special case: if action is NULL 2305 * we fill buf with otp_info records. 2306 */ 2307 struct otp_info *otpinfo; 2308 map_word lockword; 2309 len -= sizeof(struct otp_info); 2310 if (len <= 0) 2311 return -ENOSPC; 2312 ret = do_otp_read(map, chip, 2313 reg_prot_offset, 2314 (u_char *)&lockword, 2315 map_bankwidth(map), 2316 0, 0, 0); 2317 if (ret) 2318 return ret; 2319 otpinfo = (struct otp_info *)buf; 2320 otpinfo->start = from; 2321 otpinfo->length = groupsize; 2322 otpinfo->locked = 2323 !map_word_bitsset(map, lockword, 2324 CMD(1 << groupno)); 2325 from += groupsize; 2326 buf += sizeof(*otpinfo); 2327 *retlen += sizeof(*otpinfo); 2328 } else if (from >= groupsize) { 2329 from -= groupsize; 2330 data_offset += groupsize; 2331 } else { 2332 int size = groupsize; 2333 data_offset += from; 2334 size -= from; 2335 from = 0; 2336 if (size > len) 2337 size = len; 2338 ret = action(map, chip, data_offset, 2339 buf, size, reg_prot_offset, 2340 groupno, groupsize); 2341 if (ret < 0) 2342 return ret; 2343 buf += size; 2344 len -= size; 2345 *retlen += size; 2346 data_offset += size; 2347 } 2348 groupno++; 2349 groups--; 2350 } 2351 2352 /* next OTP region */ 2353 if (++field == extp->NumProtectionFields) 2354 break; 2355 reg_prot_offset = otp->ProtRegAddr; 2356 reg_fact_groups = otp->FactGroups; 2357 reg_fact_size = 1 << otp->FactProtRegSize; 2358 reg_user_groups = otp->UserGroups; 2359 reg_user_size = 1 << otp->UserProtRegSize; 2360 otp++; 2361 } 2362 } 2363 2364 return 0; 2365 } 2366 2367 static int cfi_intelext_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, 2368 size_t len, size_t *retlen, 2369 u_char *buf) 2370 { 2371 return cfi_intelext_otp_walk(mtd, from, len, retlen, 2372 buf, do_otp_read, 0); 2373 } 2374 2375 static int cfi_intelext_read_user_prot_reg(struct mtd_info *mtd, loff_t from, 2376 size_t len, size_t *retlen, 2377 u_char *buf) 2378 { 2379 return cfi_intelext_otp_walk(mtd, from, len, retlen, 2380 buf, do_otp_read, 1); 2381 } 2382 2383 static int cfi_intelext_write_user_prot_reg(struct mtd_info *mtd, loff_t from, 2384 size_t len, size_t *retlen, 2385 u_char *buf) 2386 { 2387 return cfi_intelext_otp_walk(mtd, from, len, retlen, 2388 buf, do_otp_write, 1); 2389 } 2390 2391 static int cfi_intelext_lock_user_prot_reg(struct mtd_info *mtd, 2392 loff_t from, size_t len) 2393 { 2394 size_t retlen; 2395 return cfi_intelext_otp_walk(mtd, from, len, &retlen, 2396 NULL, do_otp_lock, 1); 2397 } 2398 2399 static int cfi_intelext_get_fact_prot_info(struct mtd_info *mtd, 2400 struct otp_info *buf, size_t len) 2401 { 2402 size_t retlen; 2403 int ret; 2404 2405 ret = cfi_intelext_otp_walk(mtd, 0, len, &retlen, (u_char *)buf, NULL, 0); 2406 return ret ? : retlen; 2407 } 2408 2409 static int cfi_intelext_get_user_prot_info(struct mtd_info *mtd, 2410 struct otp_info *buf, size_t len) 2411 { 2412 size_t retlen; 2413 int ret; 2414 2415 ret = cfi_intelext_otp_walk(mtd, 0, len, &retlen, (u_char *)buf, NULL, 1); 2416 return ret ? : retlen; 2417 } 2418 2419 #endif 2420 2421 static void cfi_intelext_save_locks(struct mtd_info *mtd) 2422 { 2423 struct mtd_erase_region_info *region; 2424 int block, status, i; 2425 unsigned long adr; 2426 size_t len; 2427 2428 for (i = 0; i < mtd->numeraseregions; i++) { 2429 region = &mtd->eraseregions[i]; 2430 if (!region->lockmap) 2431 continue; 2432 2433 for (block = 0; block < region->numblocks; block++){ 2434 len = region->erasesize; 2435 adr = region->offset + block * len; 2436 2437 status = cfi_varsize_frob(mtd, 2438 do_getlockstatus_oneblock, adr, len, NULL); 2439 if (status) 2440 set_bit(block, region->lockmap); 2441 else 2442 clear_bit(block, region->lockmap); 2443 } 2444 } 2445 } 2446 2447 static int cfi_intelext_suspend(struct mtd_info *mtd) 2448 { 2449 struct map_info *map = mtd->priv; 2450 struct cfi_private *cfi = map->fldrv_priv; 2451 struct cfi_pri_intelext *extp = cfi->cmdset_priv; 2452 int i; 2453 struct flchip *chip; 2454 int ret = 0; 2455 2456 if ((mtd->flags & MTD_POWERUP_LOCK) 2457 && extp && (extp->FeatureSupport & (1 << 5))) 2458 cfi_intelext_save_locks(mtd); 2459 2460 for (i=0; !ret && i<cfi->numchips; i++) { 2461 chip = &cfi->chips[i]; 2462 2463 mutex_lock(&chip->mutex); 2464 2465 switch (chip->state) { 2466 case FL_READY: 2467 case FL_STATUS: 2468 case FL_CFI_QUERY: 2469 case FL_JEDEC_QUERY: 2470 if (chip->oldstate == FL_READY) { 2471 /* place the chip in a known state before suspend */ 2472 map_write(map, CMD(0xFF), cfi->chips[i].start); 2473 chip->oldstate = chip->state; 2474 chip->state = FL_PM_SUSPENDED; 2475 /* No need to wake_up() on this state change - 2476 * as the whole point is that nobody can do anything 2477 * with the chip now anyway. 2478 */ 2479 } else { 2480 /* There seems to be an operation pending. We must wait for it. */ 2481 printk(KERN_NOTICE "Flash device refused suspend due to pending operation (oldstate %d)\n", chip->oldstate); 2482 ret = -EAGAIN; 2483 } 2484 break; 2485 default: 2486 /* Should we actually wait? Once upon a time these routines weren't 2487 allowed to. Or should we return -EAGAIN, because the upper layers 2488 ought to have already shut down anything which was using the device 2489 anyway? The latter for now. */ 2490 printk(KERN_NOTICE "Flash device refused suspend due to active operation (state %d)\n", chip->oldstate); 2491 ret = -EAGAIN; 2492 case FL_PM_SUSPENDED: 2493 break; 2494 } 2495 mutex_unlock(&chip->mutex); 2496 } 2497 2498 /* Unlock the chips again */ 2499 2500 if (ret) { 2501 for (i--; i >=0; i--) { 2502 chip = &cfi->chips[i]; 2503 2504 mutex_lock(&chip->mutex); 2505 2506 if (chip->state == FL_PM_SUSPENDED) { 2507 /* No need to force it into a known state here, 2508 because we're returning failure, and it didn't 2509 get power cycled */ 2510 chip->state = chip->oldstate; 2511 chip->oldstate = FL_READY; 2512 wake_up(&chip->wq); 2513 } 2514 mutex_unlock(&chip->mutex); 2515 } 2516 } 2517 2518 return ret; 2519 } 2520 2521 static void cfi_intelext_restore_locks(struct mtd_info *mtd) 2522 { 2523 struct mtd_erase_region_info *region; 2524 int block, i; 2525 unsigned long adr; 2526 size_t len; 2527 2528 for (i = 0; i < mtd->numeraseregions; i++) { 2529 region = &mtd->eraseregions[i]; 2530 if (!region->lockmap) 2531 continue; 2532 2533 for (block = 0; block < region->numblocks; block++) { 2534 len = region->erasesize; 2535 adr = region->offset + block * len; 2536 2537 if (!test_bit(block, region->lockmap)) 2538 cfi_intelext_unlock(mtd, adr, len); 2539 } 2540 } 2541 } 2542 2543 static void cfi_intelext_resume(struct mtd_info *mtd) 2544 { 2545 struct map_info *map = mtd->priv; 2546 struct cfi_private *cfi = map->fldrv_priv; 2547 struct cfi_pri_intelext *extp = cfi->cmdset_priv; 2548 int i; 2549 struct flchip *chip; 2550 2551 for (i=0; i<cfi->numchips; i++) { 2552 2553 chip = &cfi->chips[i]; 2554 2555 mutex_lock(&chip->mutex); 2556 2557 /* Go to known state. Chip may have been power cycled */ 2558 if (chip->state == FL_PM_SUSPENDED) { 2559 map_write(map, CMD(0xFF), cfi->chips[i].start); 2560 chip->oldstate = chip->state = FL_READY; 2561 wake_up(&chip->wq); 2562 } 2563 2564 mutex_unlock(&chip->mutex); 2565 } 2566 2567 if ((mtd->flags & MTD_POWERUP_LOCK) 2568 && extp && (extp->FeatureSupport & (1 << 5))) 2569 cfi_intelext_restore_locks(mtd); 2570 } 2571 2572 static int cfi_intelext_reset(struct mtd_info *mtd) 2573 { 2574 struct map_info *map = mtd->priv; 2575 struct cfi_private *cfi = map->fldrv_priv; 2576 int i, ret; 2577 2578 for (i=0; i < cfi->numchips; i++) { 2579 struct flchip *chip = &cfi->chips[i]; 2580 2581 /* force the completion of any ongoing operation 2582 and switch to array mode so any bootloader in 2583 flash is accessible for soft reboot. */ 2584 mutex_lock(&chip->mutex); 2585 ret = get_chip(map, chip, chip->start, FL_SHUTDOWN); 2586 if (!ret) { 2587 map_write(map, CMD(0xff), chip->start); 2588 chip->state = FL_SHUTDOWN; 2589 put_chip(map, chip, chip->start); 2590 } 2591 mutex_unlock(&chip->mutex); 2592 } 2593 2594 return 0; 2595 } 2596 2597 static int cfi_intelext_reboot(struct notifier_block *nb, unsigned long val, 2598 void *v) 2599 { 2600 struct mtd_info *mtd; 2601 2602 mtd = container_of(nb, struct mtd_info, reboot_notifier); 2603 cfi_intelext_reset(mtd); 2604 return NOTIFY_DONE; 2605 } 2606 2607 static void cfi_intelext_destroy(struct mtd_info *mtd) 2608 { 2609 struct map_info *map = mtd->priv; 2610 struct cfi_private *cfi = map->fldrv_priv; 2611 struct mtd_erase_region_info *region; 2612 int i; 2613 cfi_intelext_reset(mtd); 2614 unregister_reboot_notifier(&mtd->reboot_notifier); 2615 kfree(cfi->cmdset_priv); 2616 kfree(cfi->cfiq); 2617 kfree(cfi->chips[0].priv); 2618 kfree(cfi); 2619 for (i = 0; i < mtd->numeraseregions; i++) { 2620 region = &mtd->eraseregions[i]; 2621 if (region->lockmap) 2622 kfree(region->lockmap); 2623 } 2624 kfree(mtd->eraseregions); 2625 } 2626 2627 MODULE_LICENSE("GPL"); 2628 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org> et al."); 2629 MODULE_DESCRIPTION("MTD chip driver for Intel/Sharp flash chips"); 2630 MODULE_ALIAS("cfi_cmdset_0003"); 2631 MODULE_ALIAS("cfi_cmdset_0200"); 2632