Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Common Flash Interface support: |
| 3 | * AMD & Fujitsu Standard Vendor Command Set (ID 0x0002) |
| 4 | * |
| 5 | * Copyright (C) 2000 Crossnet Co. <info@crossnet.co.jp> |
| 6 | * Copyright (C) 2004 Arcom Control Systems Ltd <linux@arcom.com> |
| 7 | * |
| 8 | * 2_by_8 routines added by Simon Munton |
| 9 | * |
| 10 | * 4_by_16 work by Carolyn J. Smith |
| 11 | * |
| 12 | * Occasionally maintained by Thayne Harbaugh tharbaugh at lnxi dot com |
| 13 | * |
| 14 | * This code is GPL |
| 15 | * |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame^] | 16 | * $Id: cfi_cmdset_0002.c,v 1.115 2005/05/20 03:28:23 eric Exp $ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | * |
| 18 | */ |
| 19 | |
| 20 | #include <linux/config.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/types.h> |
| 23 | #include <linux/kernel.h> |
| 24 | #include <linux/sched.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <asm/io.h> |
| 27 | #include <asm/byteorder.h> |
| 28 | |
| 29 | #include <linux/errno.h> |
| 30 | #include <linux/slab.h> |
| 31 | #include <linux/delay.h> |
| 32 | #include <linux/interrupt.h> |
| 33 | #include <linux/mtd/compatmac.h> |
| 34 | #include <linux/mtd/map.h> |
| 35 | #include <linux/mtd/mtd.h> |
| 36 | #include <linux/mtd/cfi.h> |
| 37 | |
| 38 | #define AMD_BOOTLOC_BUG |
| 39 | #define FORCE_WORD_WRITE 0 |
| 40 | |
| 41 | #define MAX_WORD_RETRIES 3 |
| 42 | |
| 43 | #define MANUFACTURER_AMD 0x0001 |
| 44 | #define MANUFACTURER_SST 0x00BF |
| 45 | #define SST49LF004B 0x0060 |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame^] | 46 | #define SST49LF008A 0x005a |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
| 48 | static int cfi_amdstd_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); |
| 49 | static int cfi_amdstd_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); |
| 50 | static int cfi_amdstd_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); |
| 51 | static int cfi_amdstd_erase_chip(struct mtd_info *, struct erase_info *); |
| 52 | static int cfi_amdstd_erase_varsize(struct mtd_info *, struct erase_info *); |
| 53 | static void cfi_amdstd_sync (struct mtd_info *); |
| 54 | static int cfi_amdstd_suspend (struct mtd_info *); |
| 55 | static void cfi_amdstd_resume (struct mtd_info *); |
| 56 | static int cfi_amdstd_secsi_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); |
| 57 | |
| 58 | static void cfi_amdstd_destroy(struct mtd_info *); |
| 59 | |
| 60 | struct mtd_info *cfi_cmdset_0002(struct map_info *, int); |
| 61 | static struct mtd_info *cfi_amdstd_setup (struct mtd_info *); |
| 62 | |
| 63 | static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode); |
| 64 | static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr); |
| 65 | #include "fwh_lock.h" |
| 66 | |
| 67 | static struct mtd_chip_driver cfi_amdstd_chipdrv = { |
| 68 | .probe = NULL, /* Not usable directly */ |
| 69 | .destroy = cfi_amdstd_destroy, |
| 70 | .name = "cfi_cmdset_0002", |
| 71 | .module = THIS_MODULE |
| 72 | }; |
| 73 | |
| 74 | |
| 75 | /* #define DEBUG_CFI_FEATURES */ |
| 76 | |
| 77 | |
| 78 | #ifdef DEBUG_CFI_FEATURES |
| 79 | static void cfi_tell_features(struct cfi_pri_amdstd *extp) |
| 80 | { |
| 81 | const char* erase_suspend[3] = { |
| 82 | "Not supported", "Read only", "Read/write" |
| 83 | }; |
| 84 | const char* top_bottom[6] = { |
| 85 | "No WP", "8x8KiB sectors at top & bottom, no WP", |
| 86 | "Bottom boot", "Top boot", |
| 87 | "Uniform, Bottom WP", "Uniform, Top WP" |
| 88 | }; |
| 89 | |
| 90 | printk(" Silicon revision: %d\n", extp->SiliconRevision >> 1); |
| 91 | printk(" Address sensitive unlock: %s\n", |
| 92 | (extp->SiliconRevision & 1) ? "Not required" : "Required"); |
| 93 | |
| 94 | if (extp->EraseSuspend < ARRAY_SIZE(erase_suspend)) |
| 95 | printk(" Erase Suspend: %s\n", erase_suspend[extp->EraseSuspend]); |
| 96 | else |
| 97 | printk(" Erase Suspend: Unknown value %d\n", extp->EraseSuspend); |
| 98 | |
| 99 | if (extp->BlkProt == 0) |
| 100 | printk(" Block protection: Not supported\n"); |
| 101 | else |
| 102 | printk(" Block protection: %d sectors per group\n", extp->BlkProt); |
| 103 | |
| 104 | |
| 105 | printk(" Temporary block unprotect: %s\n", |
| 106 | extp->TmpBlkUnprotect ? "Supported" : "Not supported"); |
| 107 | printk(" Block protect/unprotect scheme: %d\n", extp->BlkProtUnprot); |
| 108 | printk(" Number of simultaneous operations: %d\n", extp->SimultaneousOps); |
| 109 | printk(" Burst mode: %s\n", |
| 110 | extp->BurstMode ? "Supported" : "Not supported"); |
| 111 | if (extp->PageMode == 0) |
| 112 | printk(" Page mode: Not supported\n"); |
| 113 | else |
| 114 | printk(" Page mode: %d word page\n", extp->PageMode << 2); |
| 115 | |
| 116 | printk(" Vpp Supply Minimum Program/Erase Voltage: %d.%d V\n", |
| 117 | extp->VppMin >> 4, extp->VppMin & 0xf); |
| 118 | printk(" Vpp Supply Maximum Program/Erase Voltage: %d.%d V\n", |
| 119 | extp->VppMax >> 4, extp->VppMax & 0xf); |
| 120 | |
| 121 | if (extp->TopBottom < ARRAY_SIZE(top_bottom)) |
| 122 | printk(" Top/Bottom Boot Block: %s\n", top_bottom[extp->TopBottom]); |
| 123 | else |
| 124 | printk(" Top/Bottom Boot Block: Unknown value %d\n", extp->TopBottom); |
| 125 | } |
| 126 | #endif |
| 127 | |
| 128 | #ifdef AMD_BOOTLOC_BUG |
| 129 | /* Wheee. Bring me the head of someone at AMD. */ |
| 130 | static void fixup_amd_bootblock(struct mtd_info *mtd, void* param) |
| 131 | { |
| 132 | struct map_info *map = mtd->priv; |
| 133 | struct cfi_private *cfi = map->fldrv_priv; |
| 134 | struct cfi_pri_amdstd *extp = cfi->cmdset_priv; |
| 135 | __u8 major = extp->MajorVersion; |
| 136 | __u8 minor = extp->MinorVersion; |
| 137 | |
| 138 | if (((major << 8) | minor) < 0x3131) { |
| 139 | /* CFI version 1.0 => don't trust bootloc */ |
| 140 | if (cfi->id & 0x80) { |
| 141 | printk(KERN_WARNING "%s: JEDEC Device ID is 0x%02X. Assuming broken CFI table.\n", map->name, cfi->id); |
| 142 | extp->TopBottom = 3; /* top boot */ |
| 143 | } else { |
| 144 | extp->TopBottom = 2; /* bottom boot */ |
| 145 | } |
| 146 | } |
| 147 | } |
| 148 | #endif |
| 149 | |
| 150 | static void fixup_use_write_buffers(struct mtd_info *mtd, void *param) |
| 151 | { |
| 152 | struct map_info *map = mtd->priv; |
| 153 | struct cfi_private *cfi = map->fldrv_priv; |
| 154 | if (cfi->cfiq->BufWriteTimeoutTyp) { |
| 155 | DEBUG(MTD_DEBUG_LEVEL1, "Using buffer write method\n" ); |
| 156 | mtd->write = cfi_amdstd_write_buffers; |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | static void fixup_use_secsi(struct mtd_info *mtd, void *param) |
| 161 | { |
| 162 | /* Setup for chips with a secsi area */ |
| 163 | mtd->read_user_prot_reg = cfi_amdstd_secsi_read; |
| 164 | mtd->read_fact_prot_reg = cfi_amdstd_secsi_read; |
| 165 | } |
| 166 | |
| 167 | static void fixup_use_erase_chip(struct mtd_info *mtd, void *param) |
| 168 | { |
| 169 | struct map_info *map = mtd->priv; |
| 170 | struct cfi_private *cfi = map->fldrv_priv; |
| 171 | if ((cfi->cfiq->NumEraseRegions == 1) && |
| 172 | ((cfi->cfiq->EraseRegionInfo[0] & 0xffff) == 0)) { |
| 173 | mtd->erase = cfi_amdstd_erase_chip; |
| 174 | } |
| 175 | |
| 176 | } |
| 177 | |
| 178 | static struct cfi_fixup cfi_fixup_table[] = { |
| 179 | #ifdef AMD_BOOTLOC_BUG |
| 180 | { CFI_MFR_AMD, CFI_ID_ANY, fixup_amd_bootblock, NULL }, |
| 181 | #endif |
| 182 | { CFI_MFR_AMD, 0x0050, fixup_use_secsi, NULL, }, |
| 183 | { CFI_MFR_AMD, 0x0053, fixup_use_secsi, NULL, }, |
| 184 | { CFI_MFR_AMD, 0x0055, fixup_use_secsi, NULL, }, |
| 185 | { CFI_MFR_AMD, 0x0056, fixup_use_secsi, NULL, }, |
| 186 | { CFI_MFR_AMD, 0x005C, fixup_use_secsi, NULL, }, |
| 187 | { CFI_MFR_AMD, 0x005F, fixup_use_secsi, NULL, }, |
| 188 | #if !FORCE_WORD_WRITE |
| 189 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL, }, |
| 190 | #endif |
| 191 | { 0, 0, NULL, NULL } |
| 192 | }; |
| 193 | static struct cfi_fixup jedec_fixup_table[] = { |
| 194 | { MANUFACTURER_SST, SST49LF004B, fixup_use_fwh_lock, NULL, }, |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame^] | 195 | { MANUFACTURER_SST, SST49LF008A, fixup_use_fwh_lock, NULL, }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | { 0, 0, NULL, NULL } |
| 197 | }; |
| 198 | |
| 199 | static struct cfi_fixup fixup_table[] = { |
| 200 | /* The CFI vendor ids and the JEDEC vendor IDs appear |
| 201 | * to be common. It is like the devices id's are as |
| 202 | * well. This table is to pick all cases where |
| 203 | * we know that is the case. |
| 204 | */ |
| 205 | { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_erase_chip, NULL }, |
| 206 | { 0, 0, NULL, NULL } |
| 207 | }; |
| 208 | |
| 209 | |
| 210 | struct mtd_info *cfi_cmdset_0002(struct map_info *map, int primary) |
| 211 | { |
| 212 | struct cfi_private *cfi = map->fldrv_priv; |
| 213 | struct mtd_info *mtd; |
| 214 | int i; |
| 215 | |
| 216 | mtd = kmalloc(sizeof(*mtd), GFP_KERNEL); |
| 217 | if (!mtd) { |
| 218 | printk(KERN_WARNING "Failed to allocate memory for MTD device\n"); |
| 219 | return NULL; |
| 220 | } |
| 221 | memset(mtd, 0, sizeof(*mtd)); |
| 222 | mtd->priv = map; |
| 223 | mtd->type = MTD_NORFLASH; |
| 224 | |
| 225 | /* Fill in the default mtd operations */ |
| 226 | mtd->erase = cfi_amdstd_erase_varsize; |
| 227 | mtd->write = cfi_amdstd_write_words; |
| 228 | mtd->read = cfi_amdstd_read; |
| 229 | mtd->sync = cfi_amdstd_sync; |
| 230 | mtd->suspend = cfi_amdstd_suspend; |
| 231 | mtd->resume = cfi_amdstd_resume; |
| 232 | mtd->flags = MTD_CAP_NORFLASH; |
| 233 | mtd->name = map->name; |
| 234 | |
| 235 | if (cfi->cfi_mode==CFI_MODE_CFI){ |
| 236 | unsigned char bootloc; |
| 237 | /* |
| 238 | * It's a real CFI chip, not one for which the probe |
| 239 | * routine faked a CFI structure. So we read the feature |
| 240 | * table from it. |
| 241 | */ |
| 242 | __u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR; |
| 243 | struct cfi_pri_amdstd *extp; |
| 244 | |
| 245 | extp = (struct cfi_pri_amdstd*)cfi_read_pri(map, adr, sizeof(*extp), "Amd/Fujitsu"); |
| 246 | if (!extp) { |
| 247 | kfree(mtd); |
| 248 | return NULL; |
| 249 | } |
| 250 | |
| 251 | /* Install our own private info structure */ |
| 252 | cfi->cmdset_priv = extp; |
| 253 | |
| 254 | /* Apply cfi device specific fixups */ |
| 255 | cfi_fixup(mtd, cfi_fixup_table); |
| 256 | |
| 257 | #ifdef DEBUG_CFI_FEATURES |
| 258 | /* Tell the user about it in lots of lovely detail */ |
| 259 | cfi_tell_features(extp); |
| 260 | #endif |
| 261 | |
| 262 | bootloc = extp->TopBottom; |
| 263 | if ((bootloc != 2) && (bootloc != 3)) { |
| 264 | printk(KERN_WARNING "%s: CFI does not contain boot " |
| 265 | "bank location. Assuming top.\n", map->name); |
| 266 | bootloc = 2; |
| 267 | } |
| 268 | |
| 269 | if (bootloc == 3 && cfi->cfiq->NumEraseRegions > 1) { |
| 270 | printk(KERN_WARNING "%s: Swapping erase regions for broken CFI table.\n", map->name); |
| 271 | |
| 272 | for (i=0; i<cfi->cfiq->NumEraseRegions / 2; i++) { |
| 273 | int j = (cfi->cfiq->NumEraseRegions-1)-i; |
| 274 | __u32 swap; |
| 275 | |
| 276 | swap = cfi->cfiq->EraseRegionInfo[i]; |
| 277 | cfi->cfiq->EraseRegionInfo[i] = cfi->cfiq->EraseRegionInfo[j]; |
| 278 | cfi->cfiq->EraseRegionInfo[j] = swap; |
| 279 | } |
| 280 | } |
| 281 | /* Set the default CFI lock/unlock addresses */ |
| 282 | cfi->addr_unlock1 = 0x555; |
| 283 | cfi->addr_unlock2 = 0x2aa; |
| 284 | /* Modify the unlock address if we are in compatibility mode */ |
| 285 | if ( /* x16 in x8 mode */ |
| 286 | ((cfi->device_type == CFI_DEVICETYPE_X8) && |
| 287 | (cfi->cfiq->InterfaceDesc == 2)) || |
| 288 | /* x32 in x16 mode */ |
| 289 | ((cfi->device_type == CFI_DEVICETYPE_X16) && |
| 290 | (cfi->cfiq->InterfaceDesc == 4))) |
| 291 | { |
| 292 | cfi->addr_unlock1 = 0xaaa; |
| 293 | cfi->addr_unlock2 = 0x555; |
| 294 | } |
| 295 | |
| 296 | } /* CFI mode */ |
| 297 | else if (cfi->cfi_mode == CFI_MODE_JEDEC) { |
| 298 | /* Apply jedec specific fixups */ |
| 299 | cfi_fixup(mtd, jedec_fixup_table); |
| 300 | } |
| 301 | /* Apply generic fixups */ |
| 302 | cfi_fixup(mtd, fixup_table); |
| 303 | |
| 304 | for (i=0; i< cfi->numchips; i++) { |
| 305 | cfi->chips[i].word_write_time = 1<<cfi->cfiq->WordWriteTimeoutTyp; |
| 306 | cfi->chips[i].buffer_write_time = 1<<cfi->cfiq->BufWriteTimeoutTyp; |
| 307 | cfi->chips[i].erase_time = 1<<cfi->cfiq->BlockEraseTimeoutTyp; |
| 308 | } |
| 309 | |
| 310 | map->fldrv = &cfi_amdstd_chipdrv; |
| 311 | |
| 312 | return cfi_amdstd_setup(mtd); |
| 313 | } |
| 314 | |
| 315 | |
| 316 | static struct mtd_info *cfi_amdstd_setup(struct mtd_info *mtd) |
| 317 | { |
| 318 | struct map_info *map = mtd->priv; |
| 319 | struct cfi_private *cfi = map->fldrv_priv; |
| 320 | unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave; |
| 321 | unsigned long offset = 0; |
| 322 | int i,j; |
| 323 | |
| 324 | printk(KERN_NOTICE "number of %s chips: %d\n", |
| 325 | (cfi->cfi_mode == CFI_MODE_CFI)?"CFI":"JEDEC",cfi->numchips); |
| 326 | /* Select the correct geometry setup */ |
| 327 | mtd->size = devsize * cfi->numchips; |
| 328 | |
| 329 | mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips; |
| 330 | mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) |
| 331 | * mtd->numeraseregions, GFP_KERNEL); |
| 332 | if (!mtd->eraseregions) { |
| 333 | printk(KERN_WARNING "Failed to allocate memory for MTD erase region info\n"); |
| 334 | goto setup_err; |
| 335 | } |
| 336 | |
| 337 | for (i=0; i<cfi->cfiq->NumEraseRegions; i++) { |
| 338 | unsigned long ernum, ersize; |
| 339 | ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave; |
| 340 | ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1; |
| 341 | |
| 342 | if (mtd->erasesize < ersize) { |
| 343 | mtd->erasesize = ersize; |
| 344 | } |
| 345 | for (j=0; j<cfi->numchips; j++) { |
| 346 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset; |
| 347 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize; |
| 348 | mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum; |
| 349 | } |
| 350 | offset += (ersize * ernum); |
| 351 | } |
| 352 | if (offset != devsize) { |
| 353 | /* Argh */ |
| 354 | printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize); |
| 355 | goto setup_err; |
| 356 | } |
| 357 | #if 0 |
| 358 | // debug |
| 359 | for (i=0; i<mtd->numeraseregions;i++){ |
| 360 | printk("%d: offset=0x%x,size=0x%x,blocks=%d\n", |
| 361 | i,mtd->eraseregions[i].offset, |
| 362 | mtd->eraseregions[i].erasesize, |
| 363 | mtd->eraseregions[i].numblocks); |
| 364 | } |
| 365 | #endif |
| 366 | |
| 367 | /* FIXME: erase-suspend-program is broken. See |
| 368 | http://lists.infradead.org/pipermail/linux-mtd/2003-December/009001.html */ |
| 369 | printk(KERN_NOTICE "cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.\n"); |
| 370 | |
| 371 | __module_get(THIS_MODULE); |
| 372 | return mtd; |
| 373 | |
| 374 | setup_err: |
| 375 | if(mtd) { |
| 376 | if(mtd->eraseregions) |
| 377 | kfree(mtd->eraseregions); |
| 378 | kfree(mtd); |
| 379 | } |
| 380 | kfree(cfi->cmdset_priv); |
| 381 | kfree(cfi->cfiq); |
| 382 | return NULL; |
| 383 | } |
| 384 | |
| 385 | /* |
| 386 | * Return true if the chip is ready. |
| 387 | * |
| 388 | * Ready is one of: read mode, query mode, erase-suspend-read mode (in any |
| 389 | * non-suspended sector) and is indicated by no toggle bits toggling. |
| 390 | * |
| 391 | * Note that anything more complicated than checking if no bits are toggling |
| 392 | * (including checking DQ5 for an error status) is tricky to get working |
| 393 | * correctly and is therefore not done (particulary with interleaved chips |
| 394 | * as each chip must be checked independantly of the others). |
| 395 | */ |
| 396 | static int chip_ready(struct map_info *map, unsigned long addr) |
| 397 | { |
| 398 | map_word d, t; |
| 399 | |
| 400 | d = map_read(map, addr); |
| 401 | t = map_read(map, addr); |
| 402 | |
| 403 | return map_word_equal(map, d, t); |
| 404 | } |
| 405 | |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame^] | 406 | /* |
| 407 | * Return true if the chip is ready and has the correct value. |
| 408 | * |
| 409 | * Ready is one of: read mode, query mode, erase-suspend-read mode (in any |
| 410 | * non-suspended sector) and it is indicated by no bits toggling. |
| 411 | * |
| 412 | * Error are indicated by toggling bits or bits held with the wrong value, |
| 413 | * or with bits toggling. |
| 414 | * |
| 415 | * Note that anything more complicated than checking if no bits are toggling |
| 416 | * (including checking DQ5 for an error status) is tricky to get working |
| 417 | * correctly and is therefore not done (particulary with interleaved chips |
| 418 | * as each chip must be checked independantly of the others). |
| 419 | * |
| 420 | */ |
| 421 | static int chip_good(struct map_info *map, unsigned long addr, map_word expected) |
| 422 | { |
| 423 | map_word oldd, curd; |
| 424 | |
| 425 | oldd = map_read(map, addr); |
| 426 | curd = map_read(map, addr); |
| 427 | |
| 428 | return map_word_equal(map, oldd, curd) && |
| 429 | map_word_equal(map, curd, expected); |
| 430 | } |
| 431 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode) |
| 433 | { |
| 434 | DECLARE_WAITQUEUE(wait, current); |
| 435 | struct cfi_private *cfi = map->fldrv_priv; |
| 436 | unsigned long timeo; |
| 437 | struct cfi_pri_amdstd *cfip = (struct cfi_pri_amdstd *)cfi->cmdset_priv; |
| 438 | |
| 439 | resettime: |
| 440 | timeo = jiffies + HZ; |
| 441 | retry: |
| 442 | switch (chip->state) { |
| 443 | |
| 444 | case FL_STATUS: |
| 445 | for (;;) { |
| 446 | if (chip_ready(map, adr)) |
| 447 | break; |
| 448 | |
| 449 | if (time_after(jiffies, timeo)) { |
| 450 | printk(KERN_ERR "Waiting for chip to be ready timed out.\n"); |
| 451 | cfi_spin_unlock(chip->mutex); |
| 452 | return -EIO; |
| 453 | } |
| 454 | cfi_spin_unlock(chip->mutex); |
| 455 | cfi_udelay(1); |
| 456 | cfi_spin_lock(chip->mutex); |
| 457 | /* Someone else might have been playing with it. */ |
| 458 | goto retry; |
| 459 | } |
| 460 | |
| 461 | case FL_READY: |
| 462 | case FL_CFI_QUERY: |
| 463 | case FL_JEDEC_QUERY: |
| 464 | return 0; |
| 465 | |
| 466 | case FL_ERASING: |
| 467 | if (mode == FL_WRITING) /* FIXME: Erase-suspend-program appears broken. */ |
| 468 | goto sleep; |
| 469 | |
| 470 | if (!(mode == FL_READY || mode == FL_POINT |
| 471 | || !cfip |
| 472 | || (mode == FL_WRITING && (cfip->EraseSuspend & 0x2)) |
| 473 | || (mode == FL_WRITING && (cfip->EraseSuspend & 0x1)))) |
| 474 | goto sleep; |
| 475 | |
| 476 | /* We could check to see if we're trying to access the sector |
| 477 | * that is currently being erased. However, no user will try |
| 478 | * anything like that so we just wait for the timeout. */ |
| 479 | |
| 480 | /* Erase suspend */ |
| 481 | /* It's harmless to issue the Erase-Suspend and Erase-Resume |
| 482 | * commands when the erase algorithm isn't in progress. */ |
| 483 | map_write(map, CMD(0xB0), chip->in_progress_block_addr); |
| 484 | chip->oldstate = FL_ERASING; |
| 485 | chip->state = FL_ERASE_SUSPENDING; |
| 486 | chip->erase_suspended = 1; |
| 487 | for (;;) { |
| 488 | if (chip_ready(map, adr)) |
| 489 | break; |
| 490 | |
| 491 | if (time_after(jiffies, timeo)) { |
| 492 | /* Should have suspended the erase by now. |
| 493 | * Send an Erase-Resume command as either |
| 494 | * there was an error (so leave the erase |
| 495 | * routine to recover from it) or we trying to |
| 496 | * use the erase-in-progress sector. */ |
| 497 | map_write(map, CMD(0x30), chip->in_progress_block_addr); |
| 498 | chip->state = FL_ERASING; |
| 499 | chip->oldstate = FL_READY; |
| 500 | printk(KERN_ERR "MTD %s(): chip not ready after erase suspend\n", __func__); |
| 501 | return -EIO; |
| 502 | } |
| 503 | |
| 504 | cfi_spin_unlock(chip->mutex); |
| 505 | cfi_udelay(1); |
| 506 | cfi_spin_lock(chip->mutex); |
| 507 | /* Nobody will touch it while it's in state FL_ERASE_SUSPENDING. |
| 508 | So we can just loop here. */ |
| 509 | } |
| 510 | chip->state = FL_READY; |
| 511 | return 0; |
| 512 | |
| 513 | case FL_POINT: |
| 514 | /* Only if there's no operation suspended... */ |
| 515 | if (mode == FL_READY && chip->oldstate == FL_READY) |
| 516 | return 0; |
| 517 | |
| 518 | default: |
| 519 | sleep: |
| 520 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 521 | add_wait_queue(&chip->wq, &wait); |
| 522 | cfi_spin_unlock(chip->mutex); |
| 523 | schedule(); |
| 524 | remove_wait_queue(&chip->wq, &wait); |
| 525 | cfi_spin_lock(chip->mutex); |
| 526 | goto resettime; |
| 527 | } |
| 528 | } |
| 529 | |
| 530 | |
| 531 | static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr) |
| 532 | { |
| 533 | struct cfi_private *cfi = map->fldrv_priv; |
| 534 | |
| 535 | switch(chip->oldstate) { |
| 536 | case FL_ERASING: |
| 537 | chip->state = chip->oldstate; |
| 538 | map_write(map, CMD(0x30), chip->in_progress_block_addr); |
| 539 | chip->oldstate = FL_READY; |
| 540 | chip->state = FL_ERASING; |
| 541 | break; |
| 542 | |
| 543 | case FL_READY: |
| 544 | case FL_STATUS: |
| 545 | /* We should really make set_vpp() count, rather than doing this */ |
| 546 | DISABLE_VPP(map); |
| 547 | break; |
| 548 | default: |
| 549 | printk(KERN_ERR "MTD: put_chip() called with oldstate %d!!\n", chip->oldstate); |
| 550 | } |
| 551 | wake_up(&chip->wq); |
| 552 | } |
| 553 | |
| 554 | |
| 555 | static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) |
| 556 | { |
| 557 | unsigned long cmd_addr; |
| 558 | struct cfi_private *cfi = map->fldrv_priv; |
| 559 | int ret; |
| 560 | |
| 561 | adr += chip->start; |
| 562 | |
| 563 | /* Ensure cmd read/writes are aligned. */ |
| 564 | cmd_addr = adr & ~(map_bankwidth(map)-1); |
| 565 | |
| 566 | cfi_spin_lock(chip->mutex); |
| 567 | ret = get_chip(map, chip, cmd_addr, FL_READY); |
| 568 | if (ret) { |
| 569 | cfi_spin_unlock(chip->mutex); |
| 570 | return ret; |
| 571 | } |
| 572 | |
| 573 | if (chip->state != FL_POINT && chip->state != FL_READY) { |
| 574 | map_write(map, CMD(0xf0), cmd_addr); |
| 575 | chip->state = FL_READY; |
| 576 | } |
| 577 | |
| 578 | map_copy_from(map, buf, adr, len); |
| 579 | |
| 580 | put_chip(map, chip, cmd_addr); |
| 581 | |
| 582 | cfi_spin_unlock(chip->mutex); |
| 583 | return 0; |
| 584 | } |
| 585 | |
| 586 | |
| 587 | static int cfi_amdstd_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) |
| 588 | { |
| 589 | struct map_info *map = mtd->priv; |
| 590 | struct cfi_private *cfi = map->fldrv_priv; |
| 591 | unsigned long ofs; |
| 592 | int chipnum; |
| 593 | int ret = 0; |
| 594 | |
| 595 | /* ofs: offset within the first chip that the first read should start */ |
| 596 | |
| 597 | chipnum = (from >> cfi->chipshift); |
| 598 | ofs = from - (chipnum << cfi->chipshift); |
| 599 | |
| 600 | |
| 601 | *retlen = 0; |
| 602 | |
| 603 | while (len) { |
| 604 | unsigned long thislen; |
| 605 | |
| 606 | if (chipnum >= cfi->numchips) |
| 607 | break; |
| 608 | |
| 609 | if ((len + ofs -1) >> cfi->chipshift) |
| 610 | thislen = (1<<cfi->chipshift) - ofs; |
| 611 | else |
| 612 | thislen = len; |
| 613 | |
| 614 | ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); |
| 615 | if (ret) |
| 616 | break; |
| 617 | |
| 618 | *retlen += thislen; |
| 619 | len -= thislen; |
| 620 | buf += thislen; |
| 621 | |
| 622 | ofs = 0; |
| 623 | chipnum++; |
| 624 | } |
| 625 | return ret; |
| 626 | } |
| 627 | |
| 628 | |
| 629 | static inline int do_read_secsi_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf) |
| 630 | { |
| 631 | DECLARE_WAITQUEUE(wait, current); |
| 632 | unsigned long timeo = jiffies + HZ; |
| 633 | struct cfi_private *cfi = map->fldrv_priv; |
| 634 | |
| 635 | retry: |
| 636 | cfi_spin_lock(chip->mutex); |
| 637 | |
| 638 | if (chip->state != FL_READY){ |
| 639 | #if 0 |
| 640 | printk(KERN_DEBUG "Waiting for chip to read, status = %d\n", chip->state); |
| 641 | #endif |
| 642 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 643 | add_wait_queue(&chip->wq, &wait); |
| 644 | |
| 645 | cfi_spin_unlock(chip->mutex); |
| 646 | |
| 647 | schedule(); |
| 648 | remove_wait_queue(&chip->wq, &wait); |
| 649 | #if 0 |
| 650 | if(signal_pending(current)) |
| 651 | return -EINTR; |
| 652 | #endif |
| 653 | timeo = jiffies + HZ; |
| 654 | |
| 655 | goto retry; |
| 656 | } |
| 657 | |
| 658 | adr += chip->start; |
| 659 | |
| 660 | chip->state = FL_READY; |
| 661 | |
| 662 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 663 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); |
| 664 | cfi_send_gen_cmd(0x88, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 665 | |
| 666 | map_copy_from(map, buf, adr, len); |
| 667 | |
| 668 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 669 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); |
| 670 | cfi_send_gen_cmd(0x90, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 671 | cfi_send_gen_cmd(0x00, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 672 | |
| 673 | wake_up(&chip->wq); |
| 674 | cfi_spin_unlock(chip->mutex); |
| 675 | |
| 676 | return 0; |
| 677 | } |
| 678 | |
| 679 | static int cfi_amdstd_secsi_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) |
| 680 | { |
| 681 | struct map_info *map = mtd->priv; |
| 682 | struct cfi_private *cfi = map->fldrv_priv; |
| 683 | unsigned long ofs; |
| 684 | int chipnum; |
| 685 | int ret = 0; |
| 686 | |
| 687 | |
| 688 | /* ofs: offset within the first chip that the first read should start */ |
| 689 | |
| 690 | /* 8 secsi bytes per chip */ |
| 691 | chipnum=from>>3; |
| 692 | ofs=from & 7; |
| 693 | |
| 694 | |
| 695 | *retlen = 0; |
| 696 | |
| 697 | while (len) { |
| 698 | unsigned long thislen; |
| 699 | |
| 700 | if (chipnum >= cfi->numchips) |
| 701 | break; |
| 702 | |
| 703 | if ((len + ofs -1) >> 3) |
| 704 | thislen = (1<<3) - ofs; |
| 705 | else |
| 706 | thislen = len; |
| 707 | |
| 708 | ret = do_read_secsi_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf); |
| 709 | if (ret) |
| 710 | break; |
| 711 | |
| 712 | *retlen += thislen; |
| 713 | len -= thislen; |
| 714 | buf += thislen; |
| 715 | |
| 716 | ofs = 0; |
| 717 | chipnum++; |
| 718 | } |
| 719 | return ret; |
| 720 | } |
| 721 | |
| 722 | |
| 723 | static int do_write_oneword(struct map_info *map, struct flchip *chip, unsigned long adr, map_word datum) |
| 724 | { |
| 725 | struct cfi_private *cfi = map->fldrv_priv; |
| 726 | unsigned long timeo = jiffies + HZ; |
| 727 | /* |
| 728 | * We use a 1ms + 1 jiffies generic timeout for writes (most devices |
| 729 | * have a max write time of a few hundreds usec). However, we should |
| 730 | * use the maximum timeout value given by the chip at probe time |
| 731 | * instead. Unfortunately, struct flchip does have a field for |
| 732 | * maximum timeout, only for typical which can be far too short |
| 733 | * depending of the conditions. The ' + 1' is to avoid having a |
| 734 | * timeout of 0 jiffies if HZ is smaller than 1000. |
| 735 | */ |
| 736 | unsigned long uWriteTimeout = ( HZ / 1000 ) + 1; |
| 737 | int ret = 0; |
| 738 | map_word oldd; |
| 739 | int retry_cnt = 0; |
| 740 | |
| 741 | adr += chip->start; |
| 742 | |
| 743 | cfi_spin_lock(chip->mutex); |
| 744 | ret = get_chip(map, chip, adr, FL_WRITING); |
| 745 | if (ret) { |
| 746 | cfi_spin_unlock(chip->mutex); |
| 747 | return ret; |
| 748 | } |
| 749 | |
| 750 | DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n", |
| 751 | __func__, adr, datum.x[0] ); |
| 752 | |
| 753 | /* |
| 754 | * Check for a NOP for the case when the datum to write is already |
| 755 | * present - it saves time and works around buggy chips that corrupt |
| 756 | * data at other locations when 0xff is written to a location that |
| 757 | * already contains 0xff. |
| 758 | */ |
| 759 | oldd = map_read(map, adr); |
| 760 | if (map_word_equal(map, oldd, datum)) { |
| 761 | DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): NOP\n", |
| 762 | __func__); |
| 763 | goto op_done; |
| 764 | } |
| 765 | |
| 766 | ENABLE_VPP(map); |
| 767 | retry: |
| 768 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 769 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); |
| 770 | cfi_send_gen_cmd(0xA0, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 771 | map_write(map, datum, adr); |
| 772 | chip->state = FL_WRITING; |
| 773 | |
| 774 | cfi_spin_unlock(chip->mutex); |
| 775 | cfi_udelay(chip->word_write_time); |
| 776 | cfi_spin_lock(chip->mutex); |
| 777 | |
| 778 | /* See comment above for timeout value. */ |
| 779 | timeo = jiffies + uWriteTimeout; |
| 780 | for (;;) { |
| 781 | if (chip->state != FL_WRITING) { |
| 782 | /* Someone's suspended the write. Sleep */ |
| 783 | DECLARE_WAITQUEUE(wait, current); |
| 784 | |
| 785 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 786 | add_wait_queue(&chip->wq, &wait); |
| 787 | cfi_spin_unlock(chip->mutex); |
| 788 | schedule(); |
| 789 | remove_wait_queue(&chip->wq, &wait); |
| 790 | timeo = jiffies + (HZ / 2); /* FIXME */ |
| 791 | cfi_spin_lock(chip->mutex); |
| 792 | continue; |
| 793 | } |
| 794 | |
| 795 | if (chip_ready(map, adr)) |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame^] | 796 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame^] | 798 | if (time_after(jiffies, timeo)) { |
| 799 | printk(KERN_WARNING "MTD %s(): software timeout\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | break; |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame^] | 801 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | |
| 803 | /* Latency issues. Drop the lock, wait a while and retry */ |
| 804 | cfi_spin_unlock(chip->mutex); |
| 805 | cfi_udelay(1); |
| 806 | cfi_spin_lock(chip->mutex); |
| 807 | } |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame^] | 808 | /* Did we succeed? */ |
| 809 | if (!chip_good(map, adr, datum)) { |
| 810 | /* reset on all failures. */ |
| 811 | map_write( map, CMD(0xF0), chip->start ); |
| 812 | /* FIXME - should have reset delay before continuing */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame^] | 814 | if (++retry_cnt <= MAX_WORD_RETRIES) |
| 815 | goto retry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame^] | 817 | ret = -EIO; |
| 818 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | op_done: |
| 820 | chip->state = FL_READY; |
| 821 | put_chip(map, chip, adr); |
| 822 | cfi_spin_unlock(chip->mutex); |
| 823 | |
| 824 | return ret; |
| 825 | } |
| 826 | |
| 827 | |
| 828 | static int cfi_amdstd_write_words(struct mtd_info *mtd, loff_t to, size_t len, |
| 829 | size_t *retlen, const u_char *buf) |
| 830 | { |
| 831 | struct map_info *map = mtd->priv; |
| 832 | struct cfi_private *cfi = map->fldrv_priv; |
| 833 | int ret = 0; |
| 834 | int chipnum; |
| 835 | unsigned long ofs, chipstart; |
| 836 | DECLARE_WAITQUEUE(wait, current); |
| 837 | |
| 838 | *retlen = 0; |
| 839 | if (!len) |
| 840 | return 0; |
| 841 | |
| 842 | chipnum = to >> cfi->chipshift; |
| 843 | ofs = to - (chipnum << cfi->chipshift); |
| 844 | chipstart = cfi->chips[chipnum].start; |
| 845 | |
| 846 | /* If it's not bus-aligned, do the first byte write */ |
| 847 | if (ofs & (map_bankwidth(map)-1)) { |
| 848 | unsigned long bus_ofs = ofs & ~(map_bankwidth(map)-1); |
| 849 | int i = ofs - bus_ofs; |
| 850 | int n = 0; |
| 851 | map_word tmp_buf; |
| 852 | |
| 853 | retry: |
| 854 | cfi_spin_lock(cfi->chips[chipnum].mutex); |
| 855 | |
| 856 | if (cfi->chips[chipnum].state != FL_READY) { |
| 857 | #if 0 |
| 858 | printk(KERN_DEBUG "Waiting for chip to write, status = %d\n", cfi->chips[chipnum].state); |
| 859 | #endif |
| 860 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 861 | add_wait_queue(&cfi->chips[chipnum].wq, &wait); |
| 862 | |
| 863 | cfi_spin_unlock(cfi->chips[chipnum].mutex); |
| 864 | |
| 865 | schedule(); |
| 866 | remove_wait_queue(&cfi->chips[chipnum].wq, &wait); |
| 867 | #if 0 |
| 868 | if(signal_pending(current)) |
| 869 | return -EINTR; |
| 870 | #endif |
| 871 | goto retry; |
| 872 | } |
| 873 | |
| 874 | /* Load 'tmp_buf' with old contents of flash */ |
| 875 | tmp_buf = map_read(map, bus_ofs+chipstart); |
| 876 | |
| 877 | cfi_spin_unlock(cfi->chips[chipnum].mutex); |
| 878 | |
| 879 | /* Number of bytes to copy from buffer */ |
| 880 | n = min_t(int, len, map_bankwidth(map)-i); |
| 881 | |
| 882 | tmp_buf = map_word_load_partial(map, tmp_buf, buf, i, n); |
| 883 | |
| 884 | ret = do_write_oneword(map, &cfi->chips[chipnum], |
| 885 | bus_ofs, tmp_buf); |
| 886 | if (ret) |
| 887 | return ret; |
| 888 | |
| 889 | ofs += n; |
| 890 | buf += n; |
| 891 | (*retlen) += n; |
| 892 | len -= n; |
| 893 | |
| 894 | if (ofs >> cfi->chipshift) { |
| 895 | chipnum ++; |
| 896 | ofs = 0; |
| 897 | if (chipnum == cfi->numchips) |
| 898 | return 0; |
| 899 | } |
| 900 | } |
| 901 | |
| 902 | /* We are now aligned, write as much as possible */ |
| 903 | while(len >= map_bankwidth(map)) { |
| 904 | map_word datum; |
| 905 | |
| 906 | datum = map_word_load(map, buf); |
| 907 | |
| 908 | ret = do_write_oneword(map, &cfi->chips[chipnum], |
| 909 | ofs, datum); |
| 910 | if (ret) |
| 911 | return ret; |
| 912 | |
| 913 | ofs += map_bankwidth(map); |
| 914 | buf += map_bankwidth(map); |
| 915 | (*retlen) += map_bankwidth(map); |
| 916 | len -= map_bankwidth(map); |
| 917 | |
| 918 | if (ofs >> cfi->chipshift) { |
| 919 | chipnum ++; |
| 920 | ofs = 0; |
| 921 | if (chipnum == cfi->numchips) |
| 922 | return 0; |
| 923 | chipstart = cfi->chips[chipnum].start; |
| 924 | } |
| 925 | } |
| 926 | |
| 927 | /* Write the trailing bytes if any */ |
| 928 | if (len & (map_bankwidth(map)-1)) { |
| 929 | map_word tmp_buf; |
| 930 | |
| 931 | retry1: |
| 932 | cfi_spin_lock(cfi->chips[chipnum].mutex); |
| 933 | |
| 934 | if (cfi->chips[chipnum].state != FL_READY) { |
| 935 | #if 0 |
| 936 | printk(KERN_DEBUG "Waiting for chip to write, status = %d\n", cfi->chips[chipnum].state); |
| 937 | #endif |
| 938 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 939 | add_wait_queue(&cfi->chips[chipnum].wq, &wait); |
| 940 | |
| 941 | cfi_spin_unlock(cfi->chips[chipnum].mutex); |
| 942 | |
| 943 | schedule(); |
| 944 | remove_wait_queue(&cfi->chips[chipnum].wq, &wait); |
| 945 | #if 0 |
| 946 | if(signal_pending(current)) |
| 947 | return -EINTR; |
| 948 | #endif |
| 949 | goto retry1; |
| 950 | } |
| 951 | |
| 952 | tmp_buf = map_read(map, ofs + chipstart); |
| 953 | |
| 954 | cfi_spin_unlock(cfi->chips[chipnum].mutex); |
| 955 | |
| 956 | tmp_buf = map_word_load_partial(map, tmp_buf, buf, 0, len); |
| 957 | |
| 958 | ret = do_write_oneword(map, &cfi->chips[chipnum], |
| 959 | ofs, tmp_buf); |
| 960 | if (ret) |
| 961 | return ret; |
| 962 | |
| 963 | (*retlen) += len; |
| 964 | } |
| 965 | |
| 966 | return 0; |
| 967 | } |
| 968 | |
| 969 | |
| 970 | /* |
| 971 | * FIXME: interleaved mode not tested, and probably not supported! |
| 972 | */ |
| 973 | static inline int do_write_buffer(struct map_info *map, struct flchip *chip, |
| 974 | unsigned long adr, const u_char *buf, int len) |
| 975 | { |
| 976 | struct cfi_private *cfi = map->fldrv_priv; |
| 977 | unsigned long timeo = jiffies + HZ; |
| 978 | /* see comments in do_write_oneword() regarding uWriteTimeo. */ |
| 979 | unsigned long uWriteTimeout = ( HZ / 1000 ) + 1; |
| 980 | int ret = -EIO; |
| 981 | unsigned long cmd_adr; |
| 982 | int z, words; |
| 983 | map_word datum; |
| 984 | |
| 985 | adr += chip->start; |
| 986 | cmd_adr = adr; |
| 987 | |
| 988 | cfi_spin_lock(chip->mutex); |
| 989 | ret = get_chip(map, chip, adr, FL_WRITING); |
| 990 | if (ret) { |
| 991 | cfi_spin_unlock(chip->mutex); |
| 992 | return ret; |
| 993 | } |
| 994 | |
| 995 | datum = map_word_load(map, buf); |
| 996 | |
| 997 | DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n", |
| 998 | __func__, adr, datum.x[0] ); |
| 999 | |
| 1000 | ENABLE_VPP(map); |
| 1001 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1002 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); |
| 1003 | //cfi_send_gen_cmd(0xA0, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1004 | |
| 1005 | /* Write Buffer Load */ |
| 1006 | map_write(map, CMD(0x25), cmd_adr); |
| 1007 | |
| 1008 | chip->state = FL_WRITING_TO_BUFFER; |
| 1009 | |
| 1010 | /* Write length of data to come */ |
| 1011 | words = len / map_bankwidth(map); |
| 1012 | map_write(map, CMD(words - 1), cmd_adr); |
| 1013 | /* Write data */ |
| 1014 | z = 0; |
| 1015 | while(z < words * map_bankwidth(map)) { |
| 1016 | datum = map_word_load(map, buf); |
| 1017 | map_write(map, datum, adr + z); |
| 1018 | |
| 1019 | z += map_bankwidth(map); |
| 1020 | buf += map_bankwidth(map); |
| 1021 | } |
| 1022 | z -= map_bankwidth(map); |
| 1023 | |
| 1024 | adr += z; |
| 1025 | |
| 1026 | /* Write Buffer Program Confirm: GO GO GO */ |
| 1027 | map_write(map, CMD(0x29), cmd_adr); |
| 1028 | chip->state = FL_WRITING; |
| 1029 | |
| 1030 | cfi_spin_unlock(chip->mutex); |
| 1031 | cfi_udelay(chip->buffer_write_time); |
| 1032 | cfi_spin_lock(chip->mutex); |
| 1033 | |
| 1034 | timeo = jiffies + uWriteTimeout; |
| 1035 | |
| 1036 | for (;;) { |
| 1037 | if (chip->state != FL_WRITING) { |
| 1038 | /* Someone's suspended the write. Sleep */ |
| 1039 | DECLARE_WAITQUEUE(wait, current); |
| 1040 | |
| 1041 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 1042 | add_wait_queue(&chip->wq, &wait); |
| 1043 | cfi_spin_unlock(chip->mutex); |
| 1044 | schedule(); |
| 1045 | remove_wait_queue(&chip->wq, &wait); |
| 1046 | timeo = jiffies + (HZ / 2); /* FIXME */ |
| 1047 | cfi_spin_lock(chip->mutex); |
| 1048 | continue; |
| 1049 | } |
| 1050 | |
| 1051 | if (chip_ready(map, adr)) |
| 1052 | goto op_done; |
| 1053 | |
| 1054 | if( time_after(jiffies, timeo)) |
| 1055 | break; |
| 1056 | |
| 1057 | /* Latency issues. Drop the lock, wait a while and retry */ |
| 1058 | cfi_spin_unlock(chip->mutex); |
| 1059 | cfi_udelay(1); |
| 1060 | cfi_spin_lock(chip->mutex); |
| 1061 | } |
| 1062 | |
| 1063 | printk(KERN_WARNING "MTD %s(): software timeout\n", |
| 1064 | __func__ ); |
| 1065 | |
| 1066 | /* reset on all failures. */ |
| 1067 | map_write( map, CMD(0xF0), chip->start ); |
| 1068 | /* FIXME - should have reset delay before continuing */ |
| 1069 | |
| 1070 | ret = -EIO; |
| 1071 | op_done: |
| 1072 | chip->state = FL_READY; |
| 1073 | put_chip(map, chip, adr); |
| 1074 | cfi_spin_unlock(chip->mutex); |
| 1075 | |
| 1076 | return ret; |
| 1077 | } |
| 1078 | |
| 1079 | |
| 1080 | static int cfi_amdstd_write_buffers(struct mtd_info *mtd, loff_t to, size_t len, |
| 1081 | size_t *retlen, const u_char *buf) |
| 1082 | { |
| 1083 | struct map_info *map = mtd->priv; |
| 1084 | struct cfi_private *cfi = map->fldrv_priv; |
| 1085 | int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize; |
| 1086 | int ret = 0; |
| 1087 | int chipnum; |
| 1088 | unsigned long ofs; |
| 1089 | |
| 1090 | *retlen = 0; |
| 1091 | if (!len) |
| 1092 | return 0; |
| 1093 | |
| 1094 | chipnum = to >> cfi->chipshift; |
| 1095 | ofs = to - (chipnum << cfi->chipshift); |
| 1096 | |
| 1097 | /* If it's not bus-aligned, do the first word write */ |
| 1098 | if (ofs & (map_bankwidth(map)-1)) { |
| 1099 | size_t local_len = (-ofs)&(map_bankwidth(map)-1); |
| 1100 | if (local_len > len) |
| 1101 | local_len = len; |
| 1102 | ret = cfi_amdstd_write_words(mtd, ofs + (chipnum<<cfi->chipshift), |
| 1103 | local_len, retlen, buf); |
| 1104 | if (ret) |
| 1105 | return ret; |
| 1106 | ofs += local_len; |
| 1107 | buf += local_len; |
| 1108 | len -= local_len; |
| 1109 | |
| 1110 | if (ofs >> cfi->chipshift) { |
| 1111 | chipnum ++; |
| 1112 | ofs = 0; |
| 1113 | if (chipnum == cfi->numchips) |
| 1114 | return 0; |
| 1115 | } |
| 1116 | } |
| 1117 | |
| 1118 | /* Write buffer is worth it only if more than one word to write... */ |
| 1119 | while (len >= map_bankwidth(map) * 2) { |
| 1120 | /* We must not cross write block boundaries */ |
| 1121 | int size = wbufsize - (ofs & (wbufsize-1)); |
| 1122 | |
| 1123 | if (size > len) |
| 1124 | size = len; |
| 1125 | if (size % map_bankwidth(map)) |
| 1126 | size -= size % map_bankwidth(map); |
| 1127 | |
| 1128 | ret = do_write_buffer(map, &cfi->chips[chipnum], |
| 1129 | ofs, buf, size); |
| 1130 | if (ret) |
| 1131 | return ret; |
| 1132 | |
| 1133 | ofs += size; |
| 1134 | buf += size; |
| 1135 | (*retlen) += size; |
| 1136 | len -= size; |
| 1137 | |
| 1138 | if (ofs >> cfi->chipshift) { |
| 1139 | chipnum ++; |
| 1140 | ofs = 0; |
| 1141 | if (chipnum == cfi->numchips) |
| 1142 | return 0; |
| 1143 | } |
| 1144 | } |
| 1145 | |
| 1146 | if (len) { |
| 1147 | size_t retlen_dregs = 0; |
| 1148 | |
| 1149 | ret = cfi_amdstd_write_words(mtd, ofs + (chipnum<<cfi->chipshift), |
| 1150 | len, &retlen_dregs, buf); |
| 1151 | |
| 1152 | *retlen += retlen_dregs; |
| 1153 | return ret; |
| 1154 | } |
| 1155 | |
| 1156 | return 0; |
| 1157 | } |
| 1158 | |
| 1159 | |
| 1160 | /* |
| 1161 | * Handle devices with one erase region, that only implement |
| 1162 | * the chip erase command. |
| 1163 | */ |
| 1164 | static inline int do_erase_chip(struct map_info *map, struct flchip *chip) |
| 1165 | { |
| 1166 | struct cfi_private *cfi = map->fldrv_priv; |
| 1167 | unsigned long timeo = jiffies + HZ; |
| 1168 | unsigned long int adr; |
| 1169 | DECLARE_WAITQUEUE(wait, current); |
| 1170 | int ret = 0; |
| 1171 | |
| 1172 | adr = cfi->addr_unlock1; |
| 1173 | |
| 1174 | cfi_spin_lock(chip->mutex); |
| 1175 | ret = get_chip(map, chip, adr, FL_WRITING); |
| 1176 | if (ret) { |
| 1177 | cfi_spin_unlock(chip->mutex); |
| 1178 | return ret; |
| 1179 | } |
| 1180 | |
| 1181 | DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): ERASE 0x%.8lx\n", |
| 1182 | __func__, chip->start ); |
| 1183 | |
| 1184 | ENABLE_VPP(map); |
| 1185 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1186 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); |
| 1187 | cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1188 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1189 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); |
| 1190 | cfi_send_gen_cmd(0x10, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1191 | |
| 1192 | chip->state = FL_ERASING; |
| 1193 | chip->erase_suspended = 0; |
| 1194 | chip->in_progress_block_addr = adr; |
| 1195 | |
| 1196 | cfi_spin_unlock(chip->mutex); |
| 1197 | msleep(chip->erase_time/2); |
| 1198 | cfi_spin_lock(chip->mutex); |
| 1199 | |
| 1200 | timeo = jiffies + (HZ*20); |
| 1201 | |
| 1202 | for (;;) { |
| 1203 | if (chip->state != FL_ERASING) { |
| 1204 | /* Someone's suspended the erase. Sleep */ |
| 1205 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 1206 | add_wait_queue(&chip->wq, &wait); |
| 1207 | cfi_spin_unlock(chip->mutex); |
| 1208 | schedule(); |
| 1209 | remove_wait_queue(&chip->wq, &wait); |
| 1210 | cfi_spin_lock(chip->mutex); |
| 1211 | continue; |
| 1212 | } |
| 1213 | if (chip->erase_suspended) { |
| 1214 | /* This erase was suspended and resumed. |
| 1215 | Adjust the timeout */ |
| 1216 | timeo = jiffies + (HZ*20); /* FIXME */ |
| 1217 | chip->erase_suspended = 0; |
| 1218 | } |
| 1219 | |
| 1220 | if (chip_ready(map, adr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | break; |
| 1222 | |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame^] | 1223 | if (time_after(jiffies, timeo)) { |
| 1224 | printk(KERN_WARNING "MTD %s(): software timeout\n", |
| 1225 | __func__ ); |
| 1226 | break; |
| 1227 | } |
| 1228 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | /* Latency issues. Drop the lock, wait a while and retry */ |
| 1230 | cfi_spin_unlock(chip->mutex); |
| 1231 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 1232 | schedule_timeout(1); |
| 1233 | cfi_spin_lock(chip->mutex); |
| 1234 | } |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame^] | 1235 | /* Did we succeed? */ |
| 1236 | if (!chip_good(map, adr, map_word_ff(map))) { |
| 1237 | /* reset on all failures. */ |
| 1238 | map_write( map, CMD(0xF0), chip->start ); |
| 1239 | /* FIXME - should have reset delay before continuing */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame^] | 1241 | ret = -EIO; |
| 1242 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | chip->state = FL_READY; |
| 1245 | put_chip(map, chip, adr); |
| 1246 | cfi_spin_unlock(chip->mutex); |
| 1247 | |
| 1248 | return ret; |
| 1249 | } |
| 1250 | |
| 1251 | |
| 1252 | static inline int do_erase_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr, int len, void *thunk) |
| 1253 | { |
| 1254 | struct cfi_private *cfi = map->fldrv_priv; |
| 1255 | unsigned long timeo = jiffies + HZ; |
| 1256 | DECLARE_WAITQUEUE(wait, current); |
| 1257 | int ret = 0; |
| 1258 | |
| 1259 | adr += chip->start; |
| 1260 | |
| 1261 | cfi_spin_lock(chip->mutex); |
| 1262 | ret = get_chip(map, chip, adr, FL_ERASING); |
| 1263 | if (ret) { |
| 1264 | cfi_spin_unlock(chip->mutex); |
| 1265 | return ret; |
| 1266 | } |
| 1267 | |
| 1268 | DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): ERASE 0x%.8lx\n", |
| 1269 | __func__, adr ); |
| 1270 | |
| 1271 | ENABLE_VPP(map); |
| 1272 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1273 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); |
| 1274 | cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1275 | cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); |
| 1276 | cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL); |
| 1277 | map_write(map, CMD(0x30), adr); |
| 1278 | |
| 1279 | chip->state = FL_ERASING; |
| 1280 | chip->erase_suspended = 0; |
| 1281 | chip->in_progress_block_addr = adr; |
| 1282 | |
| 1283 | cfi_spin_unlock(chip->mutex); |
| 1284 | msleep(chip->erase_time/2); |
| 1285 | cfi_spin_lock(chip->mutex); |
| 1286 | |
| 1287 | timeo = jiffies + (HZ*20); |
| 1288 | |
| 1289 | for (;;) { |
| 1290 | if (chip->state != FL_ERASING) { |
| 1291 | /* Someone's suspended the erase. Sleep */ |
| 1292 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 1293 | add_wait_queue(&chip->wq, &wait); |
| 1294 | cfi_spin_unlock(chip->mutex); |
| 1295 | schedule(); |
| 1296 | remove_wait_queue(&chip->wq, &wait); |
| 1297 | cfi_spin_lock(chip->mutex); |
| 1298 | continue; |
| 1299 | } |
| 1300 | if (chip->erase_suspended) { |
| 1301 | /* This erase was suspended and resumed. |
| 1302 | Adjust the timeout */ |
| 1303 | timeo = jiffies + (HZ*20); /* FIXME */ |
| 1304 | chip->erase_suspended = 0; |
| 1305 | } |
| 1306 | |
| 1307 | if (chip_ready(map, adr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | break; |
| 1309 | |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame^] | 1310 | if (time_after(jiffies, timeo)) { |
| 1311 | printk(KERN_WARNING "MTD %s(): software timeout\n", |
| 1312 | __func__ ); |
| 1313 | break; |
| 1314 | } |
| 1315 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | /* Latency issues. Drop the lock, wait a while and retry */ |
| 1317 | cfi_spin_unlock(chip->mutex); |
| 1318 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 1319 | schedule_timeout(1); |
| 1320 | cfi_spin_lock(chip->mutex); |
| 1321 | } |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame^] | 1322 | /* Did we succeed? */ |
| 1323 | if (chip_good(map, adr, map_word_ff(map))) { |
| 1324 | /* reset on all failures. */ |
| 1325 | map_write( map, CMD(0xF0), chip->start ); |
| 1326 | /* FIXME - should have reset delay before continuing */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | |
Eric W. Biedermann | fb4a90b | 2005-05-20 04:28:26 +0100 | [diff] [blame^] | 1328 | ret = -EIO; |
| 1329 | } |
| 1330 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | chip->state = FL_READY; |
| 1332 | put_chip(map, chip, adr); |
| 1333 | cfi_spin_unlock(chip->mutex); |
| 1334 | return ret; |
| 1335 | } |
| 1336 | |
| 1337 | |
| 1338 | int cfi_amdstd_erase_varsize(struct mtd_info *mtd, struct erase_info *instr) |
| 1339 | { |
| 1340 | unsigned long ofs, len; |
| 1341 | int ret; |
| 1342 | |
| 1343 | ofs = instr->addr; |
| 1344 | len = instr->len; |
| 1345 | |
| 1346 | ret = cfi_varsize_frob(mtd, do_erase_oneblock, ofs, len, NULL); |
| 1347 | if (ret) |
| 1348 | return ret; |
| 1349 | |
| 1350 | instr->state = MTD_ERASE_DONE; |
| 1351 | mtd_erase_callback(instr); |
| 1352 | |
| 1353 | return 0; |
| 1354 | } |
| 1355 | |
| 1356 | |
| 1357 | static int cfi_amdstd_erase_chip(struct mtd_info *mtd, struct erase_info *instr) |
| 1358 | { |
| 1359 | struct map_info *map = mtd->priv; |
| 1360 | struct cfi_private *cfi = map->fldrv_priv; |
| 1361 | int ret = 0; |
| 1362 | |
| 1363 | if (instr->addr != 0) |
| 1364 | return -EINVAL; |
| 1365 | |
| 1366 | if (instr->len != mtd->size) |
| 1367 | return -EINVAL; |
| 1368 | |
| 1369 | ret = do_erase_chip(map, &cfi->chips[0]); |
| 1370 | if (ret) |
| 1371 | return ret; |
| 1372 | |
| 1373 | instr->state = MTD_ERASE_DONE; |
| 1374 | mtd_erase_callback(instr); |
| 1375 | |
| 1376 | return 0; |
| 1377 | } |
| 1378 | |
| 1379 | |
| 1380 | static void cfi_amdstd_sync (struct mtd_info *mtd) |
| 1381 | { |
| 1382 | struct map_info *map = mtd->priv; |
| 1383 | struct cfi_private *cfi = map->fldrv_priv; |
| 1384 | int i; |
| 1385 | struct flchip *chip; |
| 1386 | int ret = 0; |
| 1387 | DECLARE_WAITQUEUE(wait, current); |
| 1388 | |
| 1389 | for (i=0; !ret && i<cfi->numchips; i++) { |
| 1390 | chip = &cfi->chips[i]; |
| 1391 | |
| 1392 | retry: |
| 1393 | cfi_spin_lock(chip->mutex); |
| 1394 | |
| 1395 | switch(chip->state) { |
| 1396 | case FL_READY: |
| 1397 | case FL_STATUS: |
| 1398 | case FL_CFI_QUERY: |
| 1399 | case FL_JEDEC_QUERY: |
| 1400 | chip->oldstate = chip->state; |
| 1401 | chip->state = FL_SYNCING; |
| 1402 | /* No need to wake_up() on this state change - |
| 1403 | * as the whole point is that nobody can do anything |
| 1404 | * with the chip now anyway. |
| 1405 | */ |
| 1406 | case FL_SYNCING: |
| 1407 | cfi_spin_unlock(chip->mutex); |
| 1408 | break; |
| 1409 | |
| 1410 | default: |
| 1411 | /* Not an idle state */ |
| 1412 | add_wait_queue(&chip->wq, &wait); |
| 1413 | |
| 1414 | cfi_spin_unlock(chip->mutex); |
| 1415 | |
| 1416 | schedule(); |
| 1417 | |
| 1418 | remove_wait_queue(&chip->wq, &wait); |
| 1419 | |
| 1420 | goto retry; |
| 1421 | } |
| 1422 | } |
| 1423 | |
| 1424 | /* Unlock the chips again */ |
| 1425 | |
| 1426 | for (i--; i >=0; i--) { |
| 1427 | chip = &cfi->chips[i]; |
| 1428 | |
| 1429 | cfi_spin_lock(chip->mutex); |
| 1430 | |
| 1431 | if (chip->state == FL_SYNCING) { |
| 1432 | chip->state = chip->oldstate; |
| 1433 | wake_up(&chip->wq); |
| 1434 | } |
| 1435 | cfi_spin_unlock(chip->mutex); |
| 1436 | } |
| 1437 | } |
| 1438 | |
| 1439 | |
| 1440 | static int cfi_amdstd_suspend(struct mtd_info *mtd) |
| 1441 | { |
| 1442 | struct map_info *map = mtd->priv; |
| 1443 | struct cfi_private *cfi = map->fldrv_priv; |
| 1444 | int i; |
| 1445 | struct flchip *chip; |
| 1446 | int ret = 0; |
| 1447 | |
| 1448 | for (i=0; !ret && i<cfi->numchips; i++) { |
| 1449 | chip = &cfi->chips[i]; |
| 1450 | |
| 1451 | cfi_spin_lock(chip->mutex); |
| 1452 | |
| 1453 | switch(chip->state) { |
| 1454 | case FL_READY: |
| 1455 | case FL_STATUS: |
| 1456 | case FL_CFI_QUERY: |
| 1457 | case FL_JEDEC_QUERY: |
| 1458 | chip->oldstate = chip->state; |
| 1459 | chip->state = FL_PM_SUSPENDED; |
| 1460 | /* No need to wake_up() on this state change - |
| 1461 | * as the whole point is that nobody can do anything |
| 1462 | * with the chip now anyway. |
| 1463 | */ |
| 1464 | case FL_PM_SUSPENDED: |
| 1465 | break; |
| 1466 | |
| 1467 | default: |
| 1468 | ret = -EAGAIN; |
| 1469 | break; |
| 1470 | } |
| 1471 | cfi_spin_unlock(chip->mutex); |
| 1472 | } |
| 1473 | |
| 1474 | /* Unlock the chips again */ |
| 1475 | |
| 1476 | if (ret) { |
| 1477 | for (i--; i >=0; i--) { |
| 1478 | chip = &cfi->chips[i]; |
| 1479 | |
| 1480 | cfi_spin_lock(chip->mutex); |
| 1481 | |
| 1482 | if (chip->state == FL_PM_SUSPENDED) { |
| 1483 | chip->state = chip->oldstate; |
| 1484 | wake_up(&chip->wq); |
| 1485 | } |
| 1486 | cfi_spin_unlock(chip->mutex); |
| 1487 | } |
| 1488 | } |
| 1489 | |
| 1490 | return ret; |
| 1491 | } |
| 1492 | |
| 1493 | |
| 1494 | static void cfi_amdstd_resume(struct mtd_info *mtd) |
| 1495 | { |
| 1496 | struct map_info *map = mtd->priv; |
| 1497 | struct cfi_private *cfi = map->fldrv_priv; |
| 1498 | int i; |
| 1499 | struct flchip *chip; |
| 1500 | |
| 1501 | for (i=0; i<cfi->numchips; i++) { |
| 1502 | |
| 1503 | chip = &cfi->chips[i]; |
| 1504 | |
| 1505 | cfi_spin_lock(chip->mutex); |
| 1506 | |
| 1507 | if (chip->state == FL_PM_SUSPENDED) { |
| 1508 | chip->state = FL_READY; |
| 1509 | map_write(map, CMD(0xF0), chip->start); |
| 1510 | wake_up(&chip->wq); |
| 1511 | } |
| 1512 | else |
| 1513 | printk(KERN_ERR "Argh. Chip not in PM_SUSPENDED state upon resume()\n"); |
| 1514 | |
| 1515 | cfi_spin_unlock(chip->mutex); |
| 1516 | } |
| 1517 | } |
| 1518 | |
| 1519 | static void cfi_amdstd_destroy(struct mtd_info *mtd) |
| 1520 | { |
| 1521 | struct map_info *map = mtd->priv; |
| 1522 | struct cfi_private *cfi = map->fldrv_priv; |
| 1523 | kfree(cfi->cmdset_priv); |
| 1524 | kfree(cfi->cfiq); |
| 1525 | kfree(cfi); |
| 1526 | kfree(mtd->eraseregions); |
| 1527 | } |
| 1528 | |
| 1529 | static char im_name[]="cfi_cmdset_0002"; |
| 1530 | |
| 1531 | |
| 1532 | static int __init cfi_amdstd_init(void) |
| 1533 | { |
| 1534 | inter_module_register(im_name, THIS_MODULE, &cfi_cmdset_0002); |
| 1535 | return 0; |
| 1536 | } |
| 1537 | |
| 1538 | |
| 1539 | static void __exit cfi_amdstd_exit(void) |
| 1540 | { |
| 1541 | inter_module_unregister(im_name); |
| 1542 | } |
| 1543 | |
| 1544 | |
| 1545 | module_init(cfi_amdstd_init); |
| 1546 | module_exit(cfi_amdstd_exit); |
| 1547 | |
| 1548 | MODULE_LICENSE("GPL"); |
| 1549 | MODULE_AUTHOR("Crossnet Co. <info@crossnet.co.jp> et al."); |
| 1550 | MODULE_DESCRIPTION("MTD chip driver for AMD/Fujitsu flash chips"); |