Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Linux driver for Disk-On-Chip Millennium Plus |
| 3 | * |
| 4 | * (c) 2002-2003 Greg Ungerer <gerg@snapgear.com> |
| 5 | * (c) 2002-2003 SnapGear Inc |
| 6 | * (c) 1999 Machine Vision Holdings, Inc. |
| 7 | * (c) 1999, 2000 David Woodhouse <dwmw2@infradead.org> |
| 8 | * |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 9 | * $Id: doc2001plus.c,v 1.14 2005/11/07 11:14:24 gleixner Exp $ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | * |
| 11 | * Released under GPL |
| 12 | */ |
| 13 | |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/module.h> |
| 16 | #include <asm/errno.h> |
| 17 | #include <asm/io.h> |
| 18 | #include <asm/uaccess.h> |
| 19 | #include <linux/miscdevice.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/delay.h> |
| 21 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/init.h> |
| 23 | #include <linux/types.h> |
| 24 | #include <linux/bitops.h> |
| 25 | |
| 26 | #include <linux/mtd/mtd.h> |
| 27 | #include <linux/mtd/nand.h> |
| 28 | #include <linux/mtd/doc2000.h> |
| 29 | |
| 30 | /* #define ECC_DEBUG */ |
| 31 | |
| 32 | /* I have no idea why some DoC chips can not use memcop_form|to_io(). |
| 33 | * This may be due to the different revisions of the ASIC controller built-in or |
| 34 | * simplily a QA/Bug issue. Who knows ?? If you have trouble, please uncomment |
| 35 | * this:*/ |
| 36 | #undef USE_MEMCPY |
| 37 | |
| 38 | static int doc_read(struct mtd_info *mtd, loff_t from, size_t len, |
| 39 | size_t *retlen, u_char *buf); |
| 40 | static int doc_write(struct mtd_info *mtd, loff_t to, size_t len, |
| 41 | size_t *retlen, const u_char *buf); |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 42 | static int doc_read_oob(struct mtd_info *mtd, loff_t ofs, |
| 43 | struct mtd_oob_ops *ops); |
| 44 | static int doc_write_oob(struct mtd_info *mtd, loff_t ofs, |
| 45 | struct mtd_oob_ops *ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | static int doc_erase (struct mtd_info *mtd, struct erase_info *instr); |
| 47 | |
| 48 | static struct mtd_info *docmilpluslist = NULL; |
| 49 | |
| 50 | |
| 51 | /* Perform the required delay cycles by writing to the NOP register */ |
| 52 | static void DoC_Delay(void __iomem * docptr, int cycles) |
| 53 | { |
| 54 | int i; |
| 55 | |
| 56 | for (i = 0; (i < cycles); i++) |
| 57 | WriteDOC(0, docptr, Mplus_NOP); |
| 58 | } |
| 59 | |
| 60 | #define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1) |
| 61 | |
| 62 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ |
| 63 | static int _DoC_WaitReady(void __iomem * docptr) |
| 64 | { |
| 65 | unsigned int c = 0xffff; |
| 66 | |
| 67 | DEBUG(MTD_DEBUG_LEVEL3, |
| 68 | "_DoC_WaitReady called for out-of-line wait\n"); |
| 69 | |
| 70 | /* Out-of-line routine to wait for chip response */ |
| 71 | while (((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) && --c) |
| 72 | ; |
| 73 | |
| 74 | if (c == 0) |
| 75 | DEBUG(MTD_DEBUG_LEVEL2, "_DoC_WaitReady timed out.\n"); |
| 76 | |
| 77 | return (c == 0); |
| 78 | } |
| 79 | |
| 80 | static inline int DoC_WaitReady(void __iomem * docptr) |
| 81 | { |
| 82 | /* This is inline, to optimise the common case, where it's ready instantly */ |
| 83 | int ret = 0; |
| 84 | |
| 85 | /* read form NOP register should be issued prior to the read from CDSNControl |
| 86 | see Software Requirement 11.4 item 2. */ |
| 87 | DoC_Delay(docptr, 4); |
| 88 | |
| 89 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) |
| 90 | /* Call the out-of-line routine to wait */ |
| 91 | ret = _DoC_WaitReady(docptr); |
| 92 | |
| 93 | return ret; |
| 94 | } |
| 95 | |
| 96 | /* For some reason the Millennium Plus seems to occassionally put itself |
| 97 | * into reset mode. For me this happens randomly, with no pattern that I |
| 98 | * can detect. M-systems suggest always check this on any block level |
| 99 | * operation and setting to normal mode if in reset mode. |
| 100 | */ |
| 101 | static inline void DoC_CheckASIC(void __iomem * docptr) |
| 102 | { |
| 103 | /* Make sure the DoC is in normal mode */ |
| 104 | if ((ReadDOC(docptr, Mplus_DOCControl) & DOC_MODE_NORMAL) == 0) { |
| 105 | WriteDOC((DOC_MODE_NORMAL | DOC_MODE_MDWREN), docptr, Mplus_DOCControl); |
| 106 | WriteDOC(~(DOC_MODE_NORMAL | DOC_MODE_MDWREN), docptr, Mplus_CtrlConfirm); |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | /* DoC_Command: Send a flash command to the flash chip through the Flash |
| 111 | * command register. Need 2 Write Pipeline Terminates to complete send. |
| 112 | */ |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 113 | static void DoC_Command(void __iomem * docptr, unsigned char command, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | unsigned char xtraflags) |
| 115 | { |
| 116 | WriteDOC(command, docptr, Mplus_FlashCmd); |
| 117 | WriteDOC(command, docptr, Mplus_WritePipeTerm); |
| 118 | WriteDOC(command, docptr, Mplus_WritePipeTerm); |
| 119 | } |
| 120 | |
| 121 | /* DoC_Address: Set the current address for the flash chip through the Flash |
| 122 | * Address register. Need 2 Write Pipeline Terminates to complete send. |
| 123 | */ |
| 124 | static inline void DoC_Address(struct DiskOnChip *doc, int numbytes, |
| 125 | unsigned long ofs, unsigned char xtraflags1, |
| 126 | unsigned char xtraflags2) |
| 127 | { |
| 128 | void __iomem * docptr = doc->virtadr; |
| 129 | |
| 130 | /* Allow for possible Mill Plus internal flash interleaving */ |
| 131 | ofs >>= doc->interleave; |
| 132 | |
| 133 | switch (numbytes) { |
| 134 | case 1: |
| 135 | /* Send single byte, bits 0-7. */ |
| 136 | WriteDOC(ofs & 0xff, docptr, Mplus_FlashAddress); |
| 137 | break; |
| 138 | case 2: |
| 139 | /* Send bits 9-16 followed by 17-23 */ |
| 140 | WriteDOC((ofs >> 9) & 0xff, docptr, Mplus_FlashAddress); |
| 141 | WriteDOC((ofs >> 17) & 0xff, docptr, Mplus_FlashAddress); |
| 142 | break; |
| 143 | case 3: |
| 144 | /* Send 0-7, 9-16, then 17-23 */ |
| 145 | WriteDOC(ofs & 0xff, docptr, Mplus_FlashAddress); |
| 146 | WriteDOC((ofs >> 9) & 0xff, docptr, Mplus_FlashAddress); |
| 147 | WriteDOC((ofs >> 17) & 0xff, docptr, Mplus_FlashAddress); |
| 148 | break; |
| 149 | default: |
| 150 | return; |
| 151 | } |
| 152 | |
| 153 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); |
| 154 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); |
| 155 | } |
| 156 | |
| 157 | /* DoC_SelectChip: Select a given flash chip within the current floor */ |
| 158 | static int DoC_SelectChip(void __iomem * docptr, int chip) |
| 159 | { |
| 160 | /* No choice for flash chip on Millennium Plus */ |
| 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | /* DoC_SelectFloor: Select a given floor (bank of flash chips) */ |
| 165 | static int DoC_SelectFloor(void __iomem * docptr, int floor) |
| 166 | { |
| 167 | WriteDOC((floor & 0x3), docptr, Mplus_DeviceSelect); |
| 168 | return 0; |
| 169 | } |
| 170 | |
| 171 | /* |
| 172 | * Translate the given offset into the appropriate command and offset. |
| 173 | * This does the mapping using the 16bit interleave layout defined by |
| 174 | * M-Systems, and looks like this for a sector pair: |
| 175 | * +-----------+-------+-------+-------+--------------+---------+-----------+ |
| 176 | * | 0 --- 511 |512-517|518-519|520-521| 522 --- 1033 |1034-1039|1040 - 1055| |
| 177 | * +-----------+-------+-------+-------+--------------+---------+-----------+ |
| 178 | * | Data 0 | ECC 0 |Flags0 |Flags1 | Data 1 |ECC 1 | OOB 1 + 2 | |
| 179 | * +-----------+-------+-------+-------+--------------+---------+-----------+ |
| 180 | */ |
| 181 | /* FIXME: This lives in INFTL not here. Other users of flash devices |
| 182 | may not want it */ |
| 183 | static unsigned int DoC_GetDataOffset(struct mtd_info *mtd, loff_t *from) |
| 184 | { |
| 185 | struct DiskOnChip *this = mtd->priv; |
| 186 | |
| 187 | if (this->interleave) { |
| 188 | unsigned int ofs = *from & 0x3ff; |
| 189 | unsigned int cmd; |
| 190 | |
| 191 | if (ofs < 512) { |
| 192 | cmd = NAND_CMD_READ0; |
| 193 | ofs &= 0x1ff; |
| 194 | } else if (ofs < 1014) { |
| 195 | cmd = NAND_CMD_READ1; |
| 196 | ofs = (ofs & 0x1ff) + 10; |
| 197 | } else { |
| 198 | cmd = NAND_CMD_READOOB; |
| 199 | ofs = ofs - 1014; |
| 200 | } |
| 201 | |
| 202 | *from = (*from & ~0x3ff) | ofs; |
| 203 | return cmd; |
| 204 | } else { |
| 205 | /* No interleave */ |
| 206 | if ((*from) & 0x100) |
| 207 | return NAND_CMD_READ1; |
| 208 | return NAND_CMD_READ0; |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | static unsigned int DoC_GetECCOffset(struct mtd_info *mtd, loff_t *from) |
| 213 | { |
| 214 | unsigned int ofs, cmd; |
| 215 | |
| 216 | if (*from & 0x200) { |
| 217 | cmd = NAND_CMD_READOOB; |
| 218 | ofs = 10 + (*from & 0xf); |
| 219 | } else { |
| 220 | cmd = NAND_CMD_READ1; |
| 221 | ofs = (*from & 0xf); |
| 222 | } |
| 223 | |
| 224 | *from = (*from & ~0x3ff) | ofs; |
| 225 | return cmd; |
| 226 | } |
| 227 | |
| 228 | static unsigned int DoC_GetFlagsOffset(struct mtd_info *mtd, loff_t *from) |
| 229 | { |
| 230 | unsigned int ofs, cmd; |
| 231 | |
| 232 | cmd = NAND_CMD_READ1; |
| 233 | ofs = (*from & 0x200) ? 8 : 6; |
| 234 | *from = (*from & ~0x3ff) | ofs; |
| 235 | return cmd; |
| 236 | } |
| 237 | |
| 238 | static unsigned int DoC_GetHdrOffset(struct mtd_info *mtd, loff_t *from) |
| 239 | { |
| 240 | unsigned int ofs, cmd; |
| 241 | |
| 242 | cmd = NAND_CMD_READOOB; |
| 243 | ofs = (*from & 0x200) ? 24 : 16; |
| 244 | *from = (*from & ~0x3ff) | ofs; |
| 245 | return cmd; |
| 246 | } |
| 247 | |
| 248 | static inline void MemReadDOC(void __iomem * docptr, unsigned char *buf, int len) |
| 249 | { |
| 250 | #ifndef USE_MEMCPY |
| 251 | int i; |
| 252 | for (i = 0; i < len; i++) |
| 253 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO + i); |
| 254 | #else |
| 255 | memcpy_fromio(buf, docptr + DoC_Mil_CDSN_IO, len); |
| 256 | #endif |
| 257 | } |
| 258 | |
| 259 | static inline void MemWriteDOC(void __iomem * docptr, unsigned char *buf, int len) |
| 260 | { |
| 261 | #ifndef USE_MEMCPY |
| 262 | int i; |
| 263 | for (i = 0; i < len; i++) |
| 264 | WriteDOC(buf[i], docptr, Mil_CDSN_IO + i); |
| 265 | #else |
| 266 | memcpy_toio(docptr + DoC_Mil_CDSN_IO, buf, len); |
| 267 | #endif |
| 268 | } |
| 269 | |
| 270 | /* DoC_IdentChip: Identify a given NAND chip given {floor,chip} */ |
| 271 | static int DoC_IdentChip(struct DiskOnChip *doc, int floor, int chip) |
| 272 | { |
| 273 | int mfr, id, i, j; |
| 274 | volatile char dummy; |
| 275 | void __iomem * docptr = doc->virtadr; |
| 276 | |
| 277 | /* Page in the required floor/chip */ |
| 278 | DoC_SelectFloor(docptr, floor); |
| 279 | DoC_SelectChip(docptr, chip); |
| 280 | |
| 281 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ |
| 282 | WriteDOC((DOC_FLASH_CE | DOC_FLASH_WP), docptr, Mplus_FlashSelect); |
| 283 | |
| 284 | /* Reset the chip, see Software Requirement 11.4 item 1. */ |
| 285 | DoC_Command(docptr, NAND_CMD_RESET, 0); |
| 286 | DoC_WaitReady(docptr); |
| 287 | |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 288 | /* Read the NAND chip ID: 1. Send ReadID command */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | DoC_Command(docptr, NAND_CMD_READID, 0); |
| 290 | |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 291 | /* Read the NAND chip ID: 2. Send address byte zero */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | DoC_Address(doc, 1, 0x00, 0, 0x00); |
| 293 | |
| 294 | WriteDOC(0, docptr, Mplus_FlashControl); |
| 295 | DoC_WaitReady(docptr); |
| 296 | |
| 297 | /* Read the manufacturer and device id codes of the flash device through |
| 298 | CDSN IO register see Software Requirement 11.4 item 5.*/ |
| 299 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); |
| 300 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); |
| 301 | |
| 302 | mfr = ReadDOC(docptr, Mil_CDSN_IO); |
| 303 | if (doc->interleave) |
| 304 | dummy = ReadDOC(docptr, Mil_CDSN_IO); /* 2 way interleave */ |
| 305 | |
| 306 | id = ReadDOC(docptr, Mil_CDSN_IO); |
| 307 | if (doc->interleave) |
| 308 | dummy = ReadDOC(docptr, Mil_CDSN_IO); /* 2 way interleave */ |
| 309 | |
| 310 | dummy = ReadDOC(docptr, Mplus_LastDataRead); |
| 311 | dummy = ReadDOC(docptr, Mplus_LastDataRead); |
| 312 | |
| 313 | /* Disable flash internally */ |
| 314 | WriteDOC(0, docptr, Mplus_FlashSelect); |
| 315 | |
| 316 | /* No response - return failure */ |
| 317 | if (mfr == 0xff || mfr == 0) |
| 318 | return 0; |
| 319 | |
| 320 | for (i = 0; nand_flash_ids[i].name != NULL; i++) { |
| 321 | if (id == nand_flash_ids[i].id) { |
| 322 | /* Try to identify manufacturer */ |
| 323 | for (j = 0; nand_manuf_ids[j].id != 0x0; j++) { |
| 324 | if (nand_manuf_ids[j].id == mfr) |
| 325 | break; |
| 326 | } |
| 327 | printk(KERN_INFO "Flash chip found: Manufacturer ID: %2.2X, " |
| 328 | "Chip ID: %2.2X (%s:%s)\n", mfr, id, |
| 329 | nand_manuf_ids[j].name, nand_flash_ids[i].name); |
| 330 | doc->mfr = mfr; |
| 331 | doc->id = id; |
| 332 | doc->chipshift = ffs((nand_flash_ids[i].chipsize << 20)) - 1; |
| 333 | doc->erasesize = nand_flash_ids[i].erasesize << doc->interleave; |
| 334 | break; |
| 335 | } |
| 336 | } |
| 337 | |
| 338 | if (nand_flash_ids[i].name == NULL) |
| 339 | return 0; |
| 340 | return 1; |
| 341 | } |
| 342 | |
| 343 | /* DoC_ScanChips: Find all NAND chips present in a DiskOnChip, and identify them */ |
| 344 | static void DoC_ScanChips(struct DiskOnChip *this) |
| 345 | { |
| 346 | int floor, chip; |
| 347 | int numchips[MAX_FLOORS_MPLUS]; |
| 348 | int ret; |
| 349 | |
| 350 | this->numchips = 0; |
| 351 | this->mfr = 0; |
| 352 | this->id = 0; |
| 353 | |
| 354 | /* Work out the intended interleave setting */ |
| 355 | this->interleave = 0; |
| 356 | if (this->ChipID == DOC_ChipID_DocMilPlus32) |
| 357 | this->interleave = 1; |
| 358 | |
| 359 | /* Check the ASIC agrees */ |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 360 | if ( (this->interleave << 2) != |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | (ReadDOC(this->virtadr, Mplus_Configuration) & 4)) { |
| 362 | u_char conf = ReadDOC(this->virtadr, Mplus_Configuration); |
| 363 | printk(KERN_NOTICE "Setting DiskOnChip Millennium Plus interleave to %s\n", |
| 364 | this->interleave?"on (16-bit)":"off (8-bit)"); |
| 365 | conf ^= 4; |
| 366 | WriteDOC(conf, this->virtadr, Mplus_Configuration); |
| 367 | } |
| 368 | |
| 369 | /* For each floor, find the number of valid chips it contains */ |
| 370 | for (floor = 0,ret = 1; floor < MAX_FLOORS_MPLUS; floor++) { |
| 371 | numchips[floor] = 0; |
| 372 | for (chip = 0; chip < MAX_CHIPS_MPLUS && ret != 0; chip++) { |
| 373 | ret = DoC_IdentChip(this, floor, chip); |
| 374 | if (ret) { |
| 375 | numchips[floor]++; |
| 376 | this->numchips++; |
| 377 | } |
| 378 | } |
| 379 | } |
| 380 | /* If there are none at all that we recognise, bail */ |
| 381 | if (!this->numchips) { |
| 382 | printk("No flash chips recognised.\n"); |
| 383 | return; |
| 384 | } |
| 385 | |
| 386 | /* Allocate an array to hold the information for each chip */ |
| 387 | this->chips = kmalloc(sizeof(struct Nand) * this->numchips, GFP_KERNEL); |
| 388 | if (!this->chips){ |
| 389 | printk("MTD: No memory for allocating chip info structures\n"); |
| 390 | return; |
| 391 | } |
| 392 | |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 393 | /* Fill out the chip array with {floor, chipno} for each |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | * detected chip in the device. */ |
| 395 | for (floor = 0, ret = 0; floor < MAX_FLOORS_MPLUS; floor++) { |
| 396 | for (chip = 0 ; chip < numchips[floor] ; chip++) { |
| 397 | this->chips[ret].floor = floor; |
| 398 | this->chips[ret].chip = chip; |
| 399 | this->chips[ret].curadr = 0; |
| 400 | this->chips[ret].curmode = 0x50; |
| 401 | ret++; |
| 402 | } |
| 403 | } |
| 404 | |
| 405 | /* Calculate and print the total size of the device */ |
| 406 | this->totlen = this->numchips * (1 << this->chipshift); |
| 407 | printk(KERN_INFO "%d flash chips found. Total DiskOnChip size: %ld MiB\n", |
| 408 | this->numchips ,this->totlen >> 20); |
| 409 | } |
| 410 | |
| 411 | static int DoCMilPlus_is_alias(struct DiskOnChip *doc1, struct DiskOnChip *doc2) |
| 412 | { |
| 413 | int tmp1, tmp2, retval; |
| 414 | |
| 415 | if (doc1->physadr == doc2->physadr) |
| 416 | return 1; |
| 417 | |
| 418 | /* Use the alias resolution register which was set aside for this |
| 419 | * purpose. If it's value is the same on both chips, they might |
| 420 | * be the same chip, and we write to one and check for a change in |
| 421 | * the other. It's unclear if this register is usuable in the |
| 422 | * DoC 2000 (it's in the Millennium docs), but it seems to work. */ |
| 423 | tmp1 = ReadDOC(doc1->virtadr, Mplus_AliasResolution); |
| 424 | tmp2 = ReadDOC(doc2->virtadr, Mplus_AliasResolution); |
| 425 | if (tmp1 != tmp2) |
| 426 | return 0; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 427 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | WriteDOC((tmp1+1) % 0xff, doc1->virtadr, Mplus_AliasResolution); |
| 429 | tmp2 = ReadDOC(doc2->virtadr, Mplus_AliasResolution); |
| 430 | if (tmp2 == (tmp1+1) % 0xff) |
| 431 | retval = 1; |
| 432 | else |
| 433 | retval = 0; |
| 434 | |
| 435 | /* Restore register contents. May not be necessary, but do it just to |
| 436 | * be safe. */ |
| 437 | WriteDOC(tmp1, doc1->virtadr, Mplus_AliasResolution); |
| 438 | |
| 439 | return retval; |
| 440 | } |
| 441 | |
David Woodhouse | 5e53542 | 2006-05-08 14:05:05 +0100 | [diff] [blame] | 442 | /* This routine is found from the docprobe code by symbol_get(), |
| 443 | * which will bump the use count of this module. */ |
| 444 | void DoCMilPlus_init(struct mtd_info *mtd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | { |
| 446 | struct DiskOnChip *this = mtd->priv; |
| 447 | struct DiskOnChip *old = NULL; |
| 448 | |
| 449 | /* We must avoid being called twice for the same device. */ |
| 450 | if (docmilpluslist) |
| 451 | old = docmilpluslist->priv; |
| 452 | |
| 453 | while (old) { |
| 454 | if (DoCMilPlus_is_alias(this, old)) { |
| 455 | printk(KERN_NOTICE "Ignoring DiskOnChip Millennium " |
| 456 | "Plus at 0x%lX - already configured\n", |
| 457 | this->physadr); |
| 458 | iounmap(this->virtadr); |
| 459 | kfree(mtd); |
| 460 | return; |
| 461 | } |
| 462 | if (old->nextdoc) |
| 463 | old = old->nextdoc->priv; |
| 464 | else |
| 465 | old = NULL; |
| 466 | } |
| 467 | |
| 468 | mtd->name = "DiskOnChip Millennium Plus"; |
| 469 | printk(KERN_NOTICE "DiskOnChip Millennium Plus found at " |
| 470 | "address 0x%lX\n", this->physadr); |
| 471 | |
| 472 | mtd->type = MTD_NANDFLASH; |
| 473 | mtd->flags = MTD_CAP_NANDFLASH; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | mtd->size = 0; |
| 475 | |
| 476 | mtd->erasesize = 0; |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 477 | mtd->writesize = 512; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | mtd->oobsize = 16; |
| 479 | mtd->owner = THIS_MODULE; |
| 480 | mtd->erase = doc_erase; |
| 481 | mtd->point = NULL; |
| 482 | mtd->unpoint = NULL; |
| 483 | mtd->read = doc_read; |
| 484 | mtd->write = doc_write; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | mtd->read_oob = doc_read_oob; |
| 486 | mtd->write_oob = doc_write_oob; |
| 487 | mtd->sync = NULL; |
| 488 | |
| 489 | this->totlen = 0; |
| 490 | this->numchips = 0; |
| 491 | this->curfloor = -1; |
| 492 | this->curchip = -1; |
| 493 | |
| 494 | /* Ident all the chips present. */ |
| 495 | DoC_ScanChips(this); |
| 496 | |
| 497 | if (!this->totlen) { |
| 498 | kfree(mtd); |
| 499 | iounmap(this->virtadr); |
| 500 | } else { |
| 501 | this->nextdoc = docmilpluslist; |
| 502 | docmilpluslist = mtd; |
| 503 | mtd->size = this->totlen; |
| 504 | mtd->erasesize = this->erasesize; |
| 505 | add_mtd_device(mtd); |
| 506 | return; |
| 507 | } |
| 508 | } |
David Woodhouse | b04ecae | 2006-05-10 16:16:13 +0100 | [diff] [blame] | 509 | EXPORT_SYMBOL_GPL(DoCMilPlus_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | |
| 511 | #if 0 |
| 512 | static int doc_dumpblk(struct mtd_info *mtd, loff_t from) |
| 513 | { |
| 514 | int i; |
| 515 | loff_t fofs; |
| 516 | struct DiskOnChip *this = mtd->priv; |
| 517 | void __iomem * docptr = this->virtadr; |
| 518 | struct Nand *mychip = &this->chips[from >> (this->chipshift)]; |
| 519 | unsigned char *bp, buf[1056]; |
| 520 | char c[32]; |
| 521 | |
| 522 | from &= ~0x3ff; |
| 523 | |
| 524 | /* Don't allow read past end of device */ |
| 525 | if (from >= this->totlen) |
| 526 | return -EINVAL; |
| 527 | |
| 528 | DoC_CheckASIC(docptr); |
| 529 | |
| 530 | /* Find the chip which is to be used and select it */ |
| 531 | if (this->curfloor != mychip->floor) { |
| 532 | DoC_SelectFloor(docptr, mychip->floor); |
| 533 | DoC_SelectChip(docptr, mychip->chip); |
| 534 | } else if (this->curchip != mychip->chip) { |
| 535 | DoC_SelectChip(docptr, mychip->chip); |
| 536 | } |
| 537 | this->curfloor = mychip->floor; |
| 538 | this->curchip = mychip->chip; |
| 539 | |
| 540 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ |
| 541 | WriteDOC((DOC_FLASH_CE | DOC_FLASH_WP), docptr, Mplus_FlashSelect); |
| 542 | |
| 543 | /* Reset the chip, see Software Requirement 11.4 item 1. */ |
| 544 | DoC_Command(docptr, NAND_CMD_RESET, 0); |
| 545 | DoC_WaitReady(docptr); |
| 546 | |
| 547 | fofs = from; |
| 548 | DoC_Command(docptr, DoC_GetDataOffset(mtd, &fofs), 0); |
| 549 | DoC_Address(this, 3, fofs, 0, 0x00); |
| 550 | WriteDOC(0, docptr, Mplus_FlashControl); |
| 551 | DoC_WaitReady(docptr); |
| 552 | |
| 553 | /* disable the ECC engine */ |
| 554 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); |
| 555 | |
| 556 | ReadDOC(docptr, Mplus_ReadPipeInit); |
| 557 | ReadDOC(docptr, Mplus_ReadPipeInit); |
| 558 | |
| 559 | /* Read the data via the internal pipeline through CDSN IO |
| 560 | register, see Pipelined Read Operations 11.3 */ |
| 561 | MemReadDOC(docptr, buf, 1054); |
| 562 | buf[1054] = ReadDOC(docptr, Mplus_LastDataRead); |
| 563 | buf[1055] = ReadDOC(docptr, Mplus_LastDataRead); |
| 564 | |
| 565 | memset(&c[0], 0, sizeof(c)); |
| 566 | printk("DUMP OFFSET=%x:\n", (int)from); |
| 567 | |
| 568 | for (i = 0, bp = &buf[0]; (i < 1056); i++) { |
| 569 | if ((i % 16) == 0) |
| 570 | printk("%08x: ", i); |
| 571 | printk(" %02x", *bp); |
| 572 | c[(i & 0xf)] = ((*bp >= 0x20) && (*bp <= 0x7f)) ? *bp : '.'; |
| 573 | bp++; |
| 574 | if (((i + 1) % 16) == 0) |
| 575 | printk(" %s\n", c); |
| 576 | } |
| 577 | printk("\n"); |
| 578 | |
| 579 | /* Disable flash internally */ |
| 580 | WriteDOC(0, docptr, Mplus_FlashSelect); |
| 581 | |
| 582 | return 0; |
| 583 | } |
| 584 | #endif |
| 585 | |
| 586 | static int doc_read(struct mtd_info *mtd, loff_t from, size_t len, |
| 587 | size_t *retlen, u_char *buf) |
| 588 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | int ret, i; |
| 590 | volatile char dummy; |
| 591 | loff_t fofs; |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 592 | unsigned char syndrome[6], eccbuf[6]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | struct DiskOnChip *this = mtd->priv; |
| 594 | void __iomem * docptr = this->virtadr; |
| 595 | struct Nand *mychip = &this->chips[from >> (this->chipshift)]; |
| 596 | |
| 597 | /* Don't allow read past end of device */ |
| 598 | if (from >= this->totlen) |
| 599 | return -EINVAL; |
| 600 | |
| 601 | /* Don't allow a single read to cross a 512-byte block boundary */ |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 602 | if (from + len > ((from | 0x1ff) + 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | len = ((from | 0x1ff) + 1) - from; |
| 604 | |
| 605 | DoC_CheckASIC(docptr); |
| 606 | |
| 607 | /* Find the chip which is to be used and select it */ |
| 608 | if (this->curfloor != mychip->floor) { |
| 609 | DoC_SelectFloor(docptr, mychip->floor); |
| 610 | DoC_SelectChip(docptr, mychip->chip); |
| 611 | } else if (this->curchip != mychip->chip) { |
| 612 | DoC_SelectChip(docptr, mychip->chip); |
| 613 | } |
| 614 | this->curfloor = mychip->floor; |
| 615 | this->curchip = mychip->chip; |
| 616 | |
| 617 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ |
| 618 | WriteDOC((DOC_FLASH_CE | DOC_FLASH_WP), docptr, Mplus_FlashSelect); |
| 619 | |
| 620 | /* Reset the chip, see Software Requirement 11.4 item 1. */ |
| 621 | DoC_Command(docptr, NAND_CMD_RESET, 0); |
| 622 | DoC_WaitReady(docptr); |
| 623 | |
| 624 | fofs = from; |
| 625 | DoC_Command(docptr, DoC_GetDataOffset(mtd, &fofs), 0); |
| 626 | DoC_Address(this, 3, fofs, 0, 0x00); |
| 627 | WriteDOC(0, docptr, Mplus_FlashControl); |
| 628 | DoC_WaitReady(docptr); |
| 629 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 630 | /* init the ECC engine, see Reed-Solomon EDC/ECC 11.1 .*/ |
| 631 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); |
| 632 | WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | |
| 634 | /* Let the caller know we completed it */ |
| 635 | *retlen = len; |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 636 | ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | |
| 638 | ReadDOC(docptr, Mplus_ReadPipeInit); |
| 639 | ReadDOC(docptr, Mplus_ReadPipeInit); |
| 640 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 641 | /* Read the data via the internal pipeline through CDSN IO |
| 642 | register, see Pipelined Read Operations 11.3 */ |
| 643 | MemReadDOC(docptr, buf, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 645 | /* Read the ECC data following raw data */ |
| 646 | MemReadDOC(docptr, eccbuf, 4); |
| 647 | eccbuf[4] = ReadDOC(docptr, Mplus_LastDataRead); |
| 648 | eccbuf[5] = ReadDOC(docptr, Mplus_LastDataRead); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 650 | /* Flush the pipeline */ |
| 651 | dummy = ReadDOC(docptr, Mplus_ECCConf); |
| 652 | dummy = ReadDOC(docptr, Mplus_ECCConf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 654 | /* Check the ECC Status */ |
| 655 | if (ReadDOC(docptr, Mplus_ECCConf) & 0x80) { |
| 656 | int nb_errors; |
| 657 | /* There was an ECC error */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | #ifdef ECC_DEBUG |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 659 | printk("DiskOnChip ECC Error: Read at %lx\n", (long)from); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | #endif |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 661 | /* Read the ECC syndrom through the DiskOnChip ECC logic. |
| 662 | These syndrome will be all ZERO when there is no error */ |
| 663 | for (i = 0; i < 6; i++) |
| 664 | syndrome[i] = ReadDOC(docptr, Mplus_ECCSyndrome0 + i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 666 | nb_errors = doc_decode_ecc(buf, syndrome); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | #ifdef ECC_DEBUG |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 668 | printk("ECC Errors corrected: %x\n", nb_errors); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | #endif |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 670 | if (nb_errors < 0) { |
| 671 | /* We return error, but have actually done the |
| 672 | read. Not that this can be told to user-space, via |
| 673 | sys_read(), but at least MTD-aware stuff can know |
| 674 | about it by checking *retlen */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | #ifdef ECC_DEBUG |
| 676 | printk("%s(%d): Millennium Plus ECC error (from=0x%x:\n", |
| 677 | __FILE__, __LINE__, (int)from); |
| 678 | printk(" syndrome= %02x:%02x:%02x:%02x:%02x:" |
| 679 | "%02x\n", |
| 680 | syndrome[0], syndrome[1], syndrome[2], |
| 681 | syndrome[3], syndrome[4], syndrome[5]); |
| 682 | printk(" eccbuf= %02x:%02x:%02x:%02x:%02x:" |
| 683 | "%02x\n", |
| 684 | eccbuf[0], eccbuf[1], eccbuf[2], |
| 685 | eccbuf[3], eccbuf[4], eccbuf[5]); |
| 686 | #endif |
| 687 | ret = -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | } |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 689 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | |
| 691 | #ifdef PSYCHO_DEBUG |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 692 | printk("ECC DATA at %lx: %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", |
| 693 | (long)from, eccbuf[0], eccbuf[1], eccbuf[2], eccbuf[3], |
| 694 | eccbuf[4], eccbuf[5]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | #endif |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 696 | /* disable the ECC engine */ |
| 697 | WriteDOC(DOC_ECC_DIS, docptr , Mplus_ECCConf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | |
| 699 | /* Disable flash internally */ |
| 700 | WriteDOC(0, docptr, Mplus_FlashSelect); |
| 701 | |
| 702 | return ret; |
| 703 | } |
| 704 | |
| 705 | static int doc_write(struct mtd_info *mtd, loff_t to, size_t len, |
| 706 | size_t *retlen, const u_char *buf) |
| 707 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | int i, before, ret = 0; |
| 709 | loff_t fto; |
| 710 | volatile char dummy; |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 711 | char eccbuf[6]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | struct DiskOnChip *this = mtd->priv; |
| 713 | void __iomem * docptr = this->virtadr; |
| 714 | struct Nand *mychip = &this->chips[to >> (this->chipshift)]; |
| 715 | |
| 716 | /* Don't allow write past end of device */ |
| 717 | if (to >= this->totlen) |
| 718 | return -EINVAL; |
| 719 | |
| 720 | /* Don't allow writes which aren't exactly one block (512 bytes) */ |
| 721 | if ((to & 0x1ff) || (len != 0x200)) |
| 722 | return -EINVAL; |
| 723 | |
| 724 | /* Determine position of OOB flags, before or after data */ |
| 725 | before = (this->interleave && (to & 0x200)); |
| 726 | |
| 727 | DoC_CheckASIC(docptr); |
| 728 | |
| 729 | /* Find the chip which is to be used and select it */ |
| 730 | if (this->curfloor != mychip->floor) { |
| 731 | DoC_SelectFloor(docptr, mychip->floor); |
| 732 | DoC_SelectChip(docptr, mychip->chip); |
| 733 | } else if (this->curchip != mychip->chip) { |
| 734 | DoC_SelectChip(docptr, mychip->chip); |
| 735 | } |
| 736 | this->curfloor = mychip->floor; |
| 737 | this->curchip = mychip->chip; |
| 738 | |
| 739 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ |
| 740 | WriteDOC(DOC_FLASH_CE, docptr, Mplus_FlashSelect); |
| 741 | |
| 742 | /* Reset the chip, see Software Requirement 11.4 item 1. */ |
| 743 | DoC_Command(docptr, NAND_CMD_RESET, 0); |
| 744 | DoC_WaitReady(docptr); |
| 745 | |
| 746 | /* Set device to appropriate plane of flash */ |
| 747 | fto = to; |
| 748 | WriteDOC(DoC_GetDataOffset(mtd, &fto), docptr, Mplus_FlashCmd); |
| 749 | |
| 750 | /* On interleaved devices the flags for 2nd half 512 are before data */ |
| 751 | if (eccbuf && before) |
| 752 | fto -= 2; |
| 753 | |
| 754 | /* issue the Serial Data In command to initial the Page Program process */ |
| 755 | DoC_Command(docptr, NAND_CMD_SEQIN, 0x00); |
| 756 | DoC_Address(this, 3, fto, 0x00, 0x00); |
| 757 | |
| 758 | /* Disable the ECC engine */ |
| 759 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); |
| 760 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 761 | if (before) { |
| 762 | /* Write the block status BLOCK_USED (0x5555) */ |
| 763 | WriteDOC(0x55, docptr, Mil_CDSN_IO); |
| 764 | WriteDOC(0x55, docptr, Mil_CDSN_IO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | } |
| 766 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 767 | /* init the ECC engine, see Reed-Solomon EDC/ECC 11.1 .*/ |
| 768 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf); |
| 769 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | MemWriteDOC(docptr, (unsigned char *) buf, len); |
| 771 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 772 | /* Write ECC data to flash, the ECC info is generated by |
| 773 | the DiskOnChip ECC logic see Reed-Solomon EDC/ECC 11.1 */ |
| 774 | DoC_Delay(docptr, 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 776 | /* Read the ECC data through the DiskOnChip ECC logic */ |
| 777 | for (i = 0; i < 6; i++) |
| 778 | eccbuf[i] = ReadDOC(docptr, Mplus_ECCSyndrome0 + i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 780 | /* disable the ECC engine */ |
| 781 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 783 | /* Write the ECC data to flash */ |
| 784 | MemWriteDOC(docptr, eccbuf, 6); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 786 | if (!before) { |
| 787 | /* Write the block status BLOCK_USED (0x5555) */ |
| 788 | WriteDOC(0x55, docptr, Mil_CDSN_IO+6); |
| 789 | WriteDOC(0x55, docptr, Mil_CDSN_IO+7); |
| 790 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | |
| 792 | #ifdef PSYCHO_DEBUG |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 793 | printk("OOB data at %lx is %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", |
| 794 | (long) to, eccbuf[0], eccbuf[1], eccbuf[2], eccbuf[3], |
| 795 | eccbuf[4], eccbuf[5]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | |
| 798 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); |
| 799 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); |
| 800 | |
| 801 | /* Commit the Page Program command and wait for ready |
| 802 | see Software Requirement 11.4 item 1.*/ |
| 803 | DoC_Command(docptr, NAND_CMD_PAGEPROG, 0x00); |
| 804 | DoC_WaitReady(docptr); |
| 805 | |
| 806 | /* Read the status of the flash device through CDSN IO register |
| 807 | see Software Requirement 11.4 item 5.*/ |
| 808 | DoC_Command(docptr, NAND_CMD_STATUS, 0); |
| 809 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); |
| 810 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); |
| 811 | DoC_Delay(docptr, 2); |
| 812 | if ((dummy = ReadDOC(docptr, Mplus_LastDataRead)) & 1) { |
| 813 | printk("MTD: Error 0x%x programming at 0x%x\n", dummy, (int)to); |
| 814 | /* Error in programming |
| 815 | FIXME: implement Bad Block Replacement (in nftl.c ??) */ |
| 816 | *retlen = 0; |
| 817 | ret = -EIO; |
| 818 | } |
| 819 | dummy = ReadDOC(docptr, Mplus_LastDataRead); |
| 820 | |
| 821 | /* Disable flash internally */ |
| 822 | WriteDOC(0, docptr, Mplus_FlashSelect); |
| 823 | |
| 824 | /* Let the caller know we completed it */ |
| 825 | *retlen = len; |
| 826 | |
| 827 | return ret; |
| 828 | } |
| 829 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 830 | static int doc_read_oob(struct mtd_info *mtd, loff_t ofs, |
| 831 | struct mtd_oob_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | { |
| 833 | loff_t fofs, base; |
| 834 | struct DiskOnChip *this = mtd->priv; |
| 835 | void __iomem * docptr = this->virtadr; |
| 836 | struct Nand *mychip = &this->chips[ofs >> this->chipshift]; |
| 837 | size_t i, size, got, want; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 838 | uint8_t *buf = ops->oobbuf; |
| 839 | size_t len = ops->len; |
| 840 | |
| 841 | BUG_ON(ops->mode != MTD_OOB_PLACE); |
| 842 | |
| 843 | ofs += ops->ooboffs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | |
| 845 | DoC_CheckASIC(docptr); |
| 846 | |
| 847 | /* Find the chip which is to be used and select it */ |
| 848 | if (this->curfloor != mychip->floor) { |
| 849 | DoC_SelectFloor(docptr, mychip->floor); |
| 850 | DoC_SelectChip(docptr, mychip->chip); |
| 851 | } else if (this->curchip != mychip->chip) { |
| 852 | DoC_SelectChip(docptr, mychip->chip); |
| 853 | } |
| 854 | this->curfloor = mychip->floor; |
| 855 | this->curchip = mychip->chip; |
| 856 | |
| 857 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ |
| 858 | WriteDOC((DOC_FLASH_CE | DOC_FLASH_WP), docptr, Mplus_FlashSelect); |
| 859 | |
| 860 | /* disable the ECC engine */ |
| 861 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); |
| 862 | DoC_WaitReady(docptr); |
| 863 | |
| 864 | /* Maximum of 16 bytes in the OOB region, so limit read to that */ |
| 865 | if (len > 16) |
| 866 | len = 16; |
| 867 | got = 0; |
| 868 | want = len; |
| 869 | |
| 870 | for (i = 0; ((i < 3) && (want > 0)); i++) { |
| 871 | /* Figure out which region we are accessing... */ |
| 872 | fofs = ofs; |
| 873 | base = ofs & 0xf; |
| 874 | if (!this->interleave) { |
| 875 | DoC_Command(docptr, NAND_CMD_READOOB, 0); |
| 876 | size = 16 - base; |
| 877 | } else if (base < 6) { |
| 878 | DoC_Command(docptr, DoC_GetECCOffset(mtd, &fofs), 0); |
| 879 | size = 6 - base; |
| 880 | } else if (base < 8) { |
| 881 | DoC_Command(docptr, DoC_GetFlagsOffset(mtd, &fofs), 0); |
| 882 | size = 8 - base; |
| 883 | } else { |
| 884 | DoC_Command(docptr, DoC_GetHdrOffset(mtd, &fofs), 0); |
| 885 | size = 16 - base; |
| 886 | } |
| 887 | if (size > want) |
| 888 | size = want; |
| 889 | |
| 890 | /* Issue read command */ |
| 891 | DoC_Address(this, 3, fofs, 0, 0x00); |
| 892 | WriteDOC(0, docptr, Mplus_FlashControl); |
| 893 | DoC_WaitReady(docptr); |
| 894 | |
| 895 | ReadDOC(docptr, Mplus_ReadPipeInit); |
| 896 | ReadDOC(docptr, Mplus_ReadPipeInit); |
| 897 | MemReadDOC(docptr, &buf[got], size - 2); |
| 898 | buf[got + size - 2] = ReadDOC(docptr, Mplus_LastDataRead); |
| 899 | buf[got + size - 1] = ReadDOC(docptr, Mplus_LastDataRead); |
| 900 | |
| 901 | ofs += size; |
| 902 | got += size; |
| 903 | want -= size; |
| 904 | } |
| 905 | |
| 906 | /* Disable flash internally */ |
| 907 | WriteDOC(0, docptr, Mplus_FlashSelect); |
| 908 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 909 | ops->retlen = len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | return 0; |
| 911 | } |
| 912 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 913 | static int doc_write_oob(struct mtd_info *mtd, loff_t ofs, |
| 914 | struct mtd_oob_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | { |
| 916 | volatile char dummy; |
| 917 | loff_t fofs, base; |
| 918 | struct DiskOnChip *this = mtd->priv; |
| 919 | void __iomem * docptr = this->virtadr; |
| 920 | struct Nand *mychip = &this->chips[ofs >> this->chipshift]; |
| 921 | size_t i, size, got, want; |
| 922 | int ret = 0; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 923 | uint8_t *buf = ops->oobbuf; |
| 924 | size_t len = ops->len; |
| 925 | |
| 926 | BUG_ON(ops->mode != MTD_OOB_PLACE); |
| 927 | |
| 928 | ofs += ops->ooboffs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | |
| 930 | DoC_CheckASIC(docptr); |
| 931 | |
| 932 | /* Find the chip which is to be used and select it */ |
| 933 | if (this->curfloor != mychip->floor) { |
| 934 | DoC_SelectFloor(docptr, mychip->floor); |
| 935 | DoC_SelectChip(docptr, mychip->chip); |
| 936 | } else if (this->curchip != mychip->chip) { |
| 937 | DoC_SelectChip(docptr, mychip->chip); |
| 938 | } |
| 939 | this->curfloor = mychip->floor; |
| 940 | this->curchip = mychip->chip; |
| 941 | |
| 942 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ |
| 943 | WriteDOC(DOC_FLASH_CE, docptr, Mplus_FlashSelect); |
| 944 | |
| 945 | |
| 946 | /* Maximum of 16 bytes in the OOB region, so limit write to that */ |
| 947 | if (len > 16) |
| 948 | len = 16; |
| 949 | got = 0; |
| 950 | want = len; |
| 951 | |
| 952 | for (i = 0; ((i < 3) && (want > 0)); i++) { |
| 953 | /* Reset the chip, see Software Requirement 11.4 item 1. */ |
| 954 | DoC_Command(docptr, NAND_CMD_RESET, 0); |
| 955 | DoC_WaitReady(docptr); |
| 956 | |
| 957 | /* Figure out which region we are accessing... */ |
| 958 | fofs = ofs; |
| 959 | base = ofs & 0x0f; |
| 960 | if (!this->interleave) { |
| 961 | WriteDOC(NAND_CMD_READOOB, docptr, Mplus_FlashCmd); |
| 962 | size = 16 - base; |
| 963 | } else if (base < 6) { |
| 964 | WriteDOC(DoC_GetECCOffset(mtd, &fofs), docptr, Mplus_FlashCmd); |
| 965 | size = 6 - base; |
| 966 | } else if (base < 8) { |
| 967 | WriteDOC(DoC_GetFlagsOffset(mtd, &fofs), docptr, Mplus_FlashCmd); |
| 968 | size = 8 - base; |
| 969 | } else { |
| 970 | WriteDOC(DoC_GetHdrOffset(mtd, &fofs), docptr, Mplus_FlashCmd); |
| 971 | size = 16 - base; |
| 972 | } |
| 973 | if (size > want) |
| 974 | size = want; |
| 975 | |
| 976 | /* Issue the Serial Data In command to initial the Page Program process */ |
| 977 | DoC_Command(docptr, NAND_CMD_SEQIN, 0x00); |
| 978 | DoC_Address(this, 3, fofs, 0, 0x00); |
| 979 | |
| 980 | /* Disable the ECC engine */ |
| 981 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); |
| 982 | |
| 983 | /* Write the data via the internal pipeline through CDSN IO |
| 984 | register, see Pipelined Write Operations 11.2 */ |
| 985 | MemWriteDOC(docptr, (unsigned char *) &buf[got], size); |
| 986 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); |
| 987 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); |
| 988 | |
| 989 | /* Commit the Page Program command and wait for ready |
| 990 | see Software Requirement 11.4 item 1.*/ |
| 991 | DoC_Command(docptr, NAND_CMD_PAGEPROG, 0x00); |
| 992 | DoC_WaitReady(docptr); |
| 993 | |
| 994 | /* Read the status of the flash device through CDSN IO register |
| 995 | see Software Requirement 11.4 item 5.*/ |
| 996 | DoC_Command(docptr, NAND_CMD_STATUS, 0x00); |
| 997 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); |
| 998 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); |
| 999 | DoC_Delay(docptr, 2); |
| 1000 | if ((dummy = ReadDOC(docptr, Mplus_LastDataRead)) & 1) { |
| 1001 | printk("MTD: Error 0x%x programming oob at 0x%x\n", |
| 1002 | dummy, (int)ofs); |
| 1003 | /* FIXME: implement Bad Block Replacement */ |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 1004 | ops->retlen = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | ret = -EIO; |
| 1006 | } |
| 1007 | dummy = ReadDOC(docptr, Mplus_LastDataRead); |
| 1008 | |
| 1009 | ofs += size; |
| 1010 | got += size; |
| 1011 | want -= size; |
| 1012 | } |
| 1013 | |
| 1014 | /* Disable flash internally */ |
| 1015 | WriteDOC(0, docptr, Mplus_FlashSelect); |
| 1016 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 1017 | ops->retlen = len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | return ret; |
| 1019 | } |
| 1020 | |
| 1021 | int doc_erase(struct mtd_info *mtd, struct erase_info *instr) |
| 1022 | { |
| 1023 | volatile char dummy; |
| 1024 | struct DiskOnChip *this = mtd->priv; |
| 1025 | __u32 ofs = instr->addr; |
| 1026 | __u32 len = instr->len; |
| 1027 | void __iomem * docptr = this->virtadr; |
| 1028 | struct Nand *mychip = &this->chips[ofs >> this->chipshift]; |
| 1029 | |
| 1030 | DoC_CheckASIC(docptr); |
| 1031 | |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 1032 | if (len != mtd->erasesize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | printk(KERN_WARNING "MTD: Erase not right size (%x != %x)n", |
| 1034 | len, mtd->erasesize); |
| 1035 | |
| 1036 | /* Find the chip which is to be used and select it */ |
| 1037 | if (this->curfloor != mychip->floor) { |
| 1038 | DoC_SelectFloor(docptr, mychip->floor); |
| 1039 | DoC_SelectChip(docptr, mychip->chip); |
| 1040 | } else if (this->curchip != mychip->chip) { |
| 1041 | DoC_SelectChip(docptr, mychip->chip); |
| 1042 | } |
| 1043 | this->curfloor = mychip->floor; |
| 1044 | this->curchip = mychip->chip; |
| 1045 | |
| 1046 | instr->state = MTD_ERASE_PENDING; |
| 1047 | |
| 1048 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ |
| 1049 | WriteDOC(DOC_FLASH_CE, docptr, Mplus_FlashSelect); |
| 1050 | |
| 1051 | DoC_Command(docptr, NAND_CMD_RESET, 0x00); |
| 1052 | DoC_WaitReady(docptr); |
| 1053 | |
| 1054 | DoC_Command(docptr, NAND_CMD_ERASE1, 0); |
| 1055 | DoC_Address(this, 2, ofs, 0, 0x00); |
| 1056 | DoC_Command(docptr, NAND_CMD_ERASE2, 0); |
| 1057 | DoC_WaitReady(docptr); |
| 1058 | instr->state = MTD_ERASING; |
| 1059 | |
| 1060 | /* Read the status of the flash device through CDSN IO register |
| 1061 | see Software Requirement 11.4 item 5. */ |
| 1062 | DoC_Command(docptr, NAND_CMD_STATUS, 0); |
| 1063 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); |
| 1064 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); |
| 1065 | if ((dummy = ReadDOC(docptr, Mplus_LastDataRead)) & 1) { |
| 1066 | printk("MTD: Error 0x%x erasing at 0x%x\n", dummy, ofs); |
| 1067 | /* FIXME: implement Bad Block Replacement (in nftl.c ??) */ |
| 1068 | instr->state = MTD_ERASE_FAILED; |
| 1069 | } else { |
| 1070 | instr->state = MTD_ERASE_DONE; |
| 1071 | } |
| 1072 | dummy = ReadDOC(docptr, Mplus_LastDataRead); |
| 1073 | |
| 1074 | /* Disable flash internally */ |
| 1075 | WriteDOC(0, docptr, Mplus_FlashSelect); |
| 1076 | |
| 1077 | mtd_erase_callback(instr); |
| 1078 | |
| 1079 | return 0; |
| 1080 | } |
| 1081 | |
| 1082 | /**************************************************************************** |
| 1083 | * |
| 1084 | * Module stuff |
| 1085 | * |
| 1086 | ****************************************************************************/ |
| 1087 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | static void __exit cleanup_doc2001plus(void) |
| 1089 | { |
| 1090 | struct mtd_info *mtd; |
| 1091 | struct DiskOnChip *this; |
| 1092 | |
| 1093 | while ((mtd=docmilpluslist)) { |
| 1094 | this = mtd->priv; |
| 1095 | docmilpluslist = this->nextdoc; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 1096 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | del_mtd_device(mtd); |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 1098 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | iounmap(this->virtadr); |
| 1100 | kfree(this->chips); |
| 1101 | kfree(mtd); |
| 1102 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | } |
| 1104 | |
| 1105 | module_exit(cleanup_doc2001plus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | |
| 1107 | MODULE_LICENSE("GPL"); |
| 1108 | MODULE_AUTHOR("Greg Ungerer <gerg@snapgear.com> et al."); |
| 1109 | MODULE_DESCRIPTION("Driver for DiskOnChip Millennium Plus"); |