Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Linux driver for Disk-On-Chip 2000 and Millennium |
| 4 | * (c) 1999 Machine Vision Holdings, Inc. |
| 5 | * (c) 1999, 2000 David Woodhouse <dwmw2@infradead.org> |
| 6 | * |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 7 | * $Id: doc2000.c,v 1.67 2005/11/07 11:14:24 gleixner Exp $ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | */ |
| 9 | |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/module.h> |
| 12 | #include <asm/errno.h> |
| 13 | #include <asm/io.h> |
| 14 | #include <asm/uaccess.h> |
| 15 | #include <linux/miscdevice.h> |
| 16 | #include <linux/pci.h> |
| 17 | #include <linux/delay.h> |
| 18 | #include <linux/slab.h> |
| 19 | #include <linux/sched.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/types.h> |
| 22 | #include <linux/bitops.h> |
Ingo Molnar | 040d79f | 2006-03-31 02:29:40 -0800 | [diff] [blame] | 23 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | |
| 25 | #include <linux/mtd/mtd.h> |
| 26 | #include <linux/mtd/nand.h> |
| 27 | #include <linux/mtd/doc2000.h> |
| 28 | |
| 29 | #define DOC_SUPPORT_2000 |
| 30 | #define DOC_SUPPORT_2000TSOP |
| 31 | #define DOC_SUPPORT_MILLENNIUM |
| 32 | |
| 33 | #ifdef DOC_SUPPORT_2000 |
| 34 | #define DoC_is_2000(doc) (doc->ChipID == DOC_ChipID_Doc2k) |
| 35 | #else |
| 36 | #define DoC_is_2000(doc) (0) |
| 37 | #endif |
| 38 | |
| 39 | #if defined(DOC_SUPPORT_2000TSOP) || defined(DOC_SUPPORT_MILLENNIUM) |
| 40 | #define DoC_is_Millennium(doc) (doc->ChipID == DOC_ChipID_DocMil) |
| 41 | #else |
| 42 | #define DoC_is_Millennium(doc) (0) |
| 43 | #endif |
| 44 | |
| 45 | /* #define ECC_DEBUG */ |
| 46 | |
| 47 | /* I have no idea why some DoC chips can not use memcpy_from|to_io(). |
| 48 | * This may be due to the different revisions of the ASIC controller built-in or |
| 49 | * simplily a QA/Bug issue. Who knows ?? If you have trouble, please uncomment |
| 50 | * this: |
| 51 | #undef USE_MEMCPY |
| 52 | */ |
| 53 | |
| 54 | static int doc_read(struct mtd_info *mtd, loff_t from, size_t len, |
| 55 | size_t *retlen, u_char *buf); |
| 56 | static int doc_write(struct mtd_info *mtd, loff_t to, size_t len, |
| 57 | size_t *retlen, const u_char *buf); |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 58 | static int doc_read_oob(struct mtd_info *mtd, loff_t ofs, |
| 59 | struct mtd_oob_ops *ops); |
| 60 | static int doc_write_oob(struct mtd_info *mtd, loff_t ofs, |
| 61 | struct mtd_oob_ops *ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | static int doc_write_oob_nolock(struct mtd_info *mtd, loff_t ofs, size_t len, |
| 63 | size_t *retlen, const u_char *buf); |
| 64 | static int doc_erase (struct mtd_info *mtd, struct erase_info *instr); |
| 65 | |
| 66 | static struct mtd_info *doc2klist = NULL; |
| 67 | |
| 68 | /* Perform the required delay cycles by reading from the appropriate register */ |
| 69 | static void DoC_Delay(struct DiskOnChip *doc, unsigned short cycles) |
| 70 | { |
| 71 | volatile char dummy; |
| 72 | int i; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 73 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | for (i = 0; i < cycles; i++) { |
| 75 | if (DoC_is_Millennium(doc)) |
| 76 | dummy = ReadDOC(doc->virtadr, NOP); |
| 77 | else |
| 78 | dummy = ReadDOC(doc->virtadr, DOCStatus); |
| 79 | } |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 80 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | } |
| 82 | |
| 83 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ |
| 84 | static int _DoC_WaitReady(struct DiskOnChip *doc) |
| 85 | { |
| 86 | void __iomem *docptr = doc->virtadr; |
| 87 | unsigned long timeo = jiffies + (HZ * 10); |
| 88 | |
| 89 | DEBUG(MTD_DEBUG_LEVEL3, |
| 90 | "_DoC_WaitReady called for out-of-line wait\n"); |
| 91 | |
| 92 | /* Out-of-line routine to wait for chip response */ |
| 93 | while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { |
| 94 | /* issue 2 read from NOP register after reading from CDSNControl register |
| 95 | see Software Requirement 11.4 item 2. */ |
| 96 | DoC_Delay(doc, 2); |
| 97 | |
| 98 | if (time_after(jiffies, timeo)) { |
| 99 | DEBUG(MTD_DEBUG_LEVEL2, "_DoC_WaitReady timed out.\n"); |
| 100 | return -EIO; |
| 101 | } |
| 102 | udelay(1); |
| 103 | cond_resched(); |
| 104 | } |
| 105 | |
| 106 | return 0; |
| 107 | } |
| 108 | |
| 109 | static inline int DoC_WaitReady(struct DiskOnChip *doc) |
| 110 | { |
| 111 | void __iomem *docptr = doc->virtadr; |
| 112 | |
| 113 | /* This is inline, to optimise the common case, where it's ready instantly */ |
| 114 | int ret = 0; |
| 115 | |
| 116 | /* 4 read form NOP register should be issued in prior to the read from CDSNControl |
| 117 | see Software Requirement 11.4 item 2. */ |
| 118 | DoC_Delay(doc, 4); |
| 119 | |
| 120 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) |
| 121 | /* Call the out-of-line routine to wait */ |
| 122 | ret = _DoC_WaitReady(doc); |
| 123 | |
| 124 | /* issue 2 read from NOP register after reading from CDSNControl register |
| 125 | see Software Requirement 11.4 item 2. */ |
| 126 | DoC_Delay(doc, 2); |
| 127 | |
| 128 | return ret; |
| 129 | } |
| 130 | |
| 131 | /* DoC_Command: Send a flash command to the flash chip through the CDSN Slow IO register to |
| 132 | bypass the internal pipeline. Each of 4 delay cycles (read from the NOP register) is |
| 133 | required after writing to CDSN Control register, see Software Requirement 11.4 item 3. */ |
| 134 | |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 135 | static int DoC_Command(struct DiskOnChip *doc, unsigned char command, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | unsigned char xtraflags) |
| 137 | { |
| 138 | void __iomem *docptr = doc->virtadr; |
| 139 | |
| 140 | if (DoC_is_2000(doc)) |
| 141 | xtraflags |= CDSN_CTRL_FLASH_IO; |
| 142 | |
| 143 | /* Assert the CLE (Command Latch Enable) line to the flash chip */ |
| 144 | WriteDOC(xtraflags | CDSN_CTRL_CLE | CDSN_CTRL_CE, docptr, CDSNControl); |
| 145 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ |
| 146 | |
| 147 | if (DoC_is_Millennium(doc)) |
| 148 | WriteDOC(command, docptr, CDSNSlowIO); |
| 149 | |
| 150 | /* Send the command */ |
| 151 | WriteDOC_(command, docptr, doc->ioreg); |
| 152 | if (DoC_is_Millennium(doc)) |
| 153 | WriteDOC(command, docptr, WritePipeTerm); |
| 154 | |
| 155 | /* Lower the CLE line */ |
| 156 | WriteDOC(xtraflags | CDSN_CTRL_CE, docptr, CDSNControl); |
| 157 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ |
| 158 | |
| 159 | /* Wait for the chip to respond - Software requirement 11.4.1 (extended for any command) */ |
| 160 | return DoC_WaitReady(doc); |
| 161 | } |
| 162 | |
| 163 | /* DoC_Address: Set the current address for the flash chip through the CDSN Slow IO register to |
| 164 | bypass the internal pipeline. Each of 4 delay cycles (read from the NOP register) is |
| 165 | required after writing to CDSN Control register, see Software Requirement 11.4 item 3. */ |
| 166 | |
| 167 | static int DoC_Address(struct DiskOnChip *doc, int numbytes, unsigned long ofs, |
| 168 | unsigned char xtraflags1, unsigned char xtraflags2) |
| 169 | { |
| 170 | int i; |
| 171 | void __iomem *docptr = doc->virtadr; |
| 172 | |
| 173 | if (DoC_is_2000(doc)) |
| 174 | xtraflags1 |= CDSN_CTRL_FLASH_IO; |
| 175 | |
| 176 | /* Assert the ALE (Address Latch Enable) line to the flash chip */ |
| 177 | WriteDOC(xtraflags1 | CDSN_CTRL_ALE | CDSN_CTRL_CE, docptr, CDSNControl); |
| 178 | |
| 179 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ |
| 180 | |
| 181 | /* Send the address */ |
| 182 | /* Devices with 256-byte page are addressed as: |
| 183 | Column (bits 0-7), Page (bits 8-15, 16-23, 24-31) |
| 184 | * there is no device on the market with page256 |
| 185 | and more than 24 bits. |
| 186 | Devices with 512-byte page are addressed as: |
| 187 | Column (bits 0-7), Page (bits 9-16, 17-24, 25-31) |
| 188 | * 25-31 is sent only if the chip support it. |
| 189 | * bit 8 changes the read command to be sent |
| 190 | (NAND_CMD_READ0 or NAND_CMD_READ1). |
| 191 | */ |
| 192 | |
| 193 | if (numbytes == ADDR_COLUMN || numbytes == ADDR_COLUMN_PAGE) { |
| 194 | if (DoC_is_Millennium(doc)) |
| 195 | WriteDOC(ofs & 0xff, docptr, CDSNSlowIO); |
| 196 | WriteDOC_(ofs & 0xff, docptr, doc->ioreg); |
| 197 | } |
| 198 | |
| 199 | if (doc->page256) { |
| 200 | ofs = ofs >> 8; |
| 201 | } else { |
| 202 | ofs = ofs >> 9; |
| 203 | } |
| 204 | |
| 205 | if (numbytes == ADDR_PAGE || numbytes == ADDR_COLUMN_PAGE) { |
| 206 | for (i = 0; i < doc->pageadrlen; i++, ofs = ofs >> 8) { |
| 207 | if (DoC_is_Millennium(doc)) |
| 208 | WriteDOC(ofs & 0xff, docptr, CDSNSlowIO); |
| 209 | WriteDOC_(ofs & 0xff, docptr, doc->ioreg); |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | if (DoC_is_Millennium(doc)) |
| 214 | WriteDOC(ofs & 0xff, docptr, WritePipeTerm); |
| 215 | |
| 216 | DoC_Delay(doc, 2); /* Needed for some slow flash chips. mf. */ |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 217 | |
| 218 | /* FIXME: The SlowIO's for millennium could be replaced by |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | a single WritePipeTerm here. mf. */ |
| 220 | |
| 221 | /* Lower the ALE line */ |
| 222 | WriteDOC(xtraflags1 | xtraflags2 | CDSN_CTRL_CE, docptr, |
| 223 | CDSNControl); |
| 224 | |
| 225 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ |
| 226 | |
| 227 | /* Wait for the chip to respond - Software requirement 11.4.1 */ |
| 228 | return DoC_WaitReady(doc); |
| 229 | } |
| 230 | |
| 231 | /* Read a buffer from DoC, taking care of Millennium odditys */ |
| 232 | static void DoC_ReadBuf(struct DiskOnChip *doc, u_char * buf, int len) |
| 233 | { |
| 234 | volatile int dummy; |
| 235 | int modulus = 0xffff; |
| 236 | void __iomem *docptr = doc->virtadr; |
| 237 | int i; |
| 238 | |
| 239 | if (len <= 0) |
| 240 | return; |
| 241 | |
| 242 | if (DoC_is_Millennium(doc)) { |
| 243 | /* Read the data via the internal pipeline through CDSN IO register, |
| 244 | see Pipelined Read Operations 11.3 */ |
| 245 | dummy = ReadDOC(docptr, ReadPipeInit); |
| 246 | |
| 247 | /* Millennium should use the LastDataRead register - Pipeline Reads */ |
| 248 | len--; |
| 249 | |
| 250 | /* This is needed for correctly ECC calculation */ |
| 251 | modulus = 0xff; |
| 252 | } |
| 253 | |
| 254 | for (i = 0; i < len; i++) |
| 255 | buf[i] = ReadDOC_(docptr, doc->ioreg + (i & modulus)); |
| 256 | |
| 257 | if (DoC_is_Millennium(doc)) { |
| 258 | buf[i] = ReadDOC(docptr, LastDataRead); |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | /* Write a buffer to DoC, taking care of Millennium odditys */ |
| 263 | static void DoC_WriteBuf(struct DiskOnChip *doc, const u_char * buf, int len) |
| 264 | { |
| 265 | void __iomem *docptr = doc->virtadr; |
| 266 | int i; |
| 267 | |
| 268 | if (len <= 0) |
| 269 | return; |
| 270 | |
| 271 | for (i = 0; i < len; i++) |
| 272 | WriteDOC_(buf[i], docptr, doc->ioreg + i); |
| 273 | |
| 274 | if (DoC_is_Millennium(doc)) { |
| 275 | WriteDOC(0x00, docptr, WritePipeTerm); |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | |
| 280 | /* DoC_SelectChip: Select a given flash chip within the current floor */ |
| 281 | |
| 282 | static inline int DoC_SelectChip(struct DiskOnChip *doc, int chip) |
| 283 | { |
| 284 | void __iomem *docptr = doc->virtadr; |
| 285 | |
| 286 | /* Software requirement 11.4.4 before writing DeviceSelect */ |
| 287 | /* Deassert the CE line to eliminate glitches on the FCE# outputs */ |
| 288 | WriteDOC(CDSN_CTRL_WP, docptr, CDSNControl); |
| 289 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ |
| 290 | |
| 291 | /* Select the individual flash chip requested */ |
| 292 | WriteDOC(chip, docptr, CDSNDeviceSelect); |
| 293 | DoC_Delay(doc, 4); |
| 294 | |
| 295 | /* Reassert the CE line */ |
| 296 | WriteDOC(CDSN_CTRL_CE | CDSN_CTRL_FLASH_IO | CDSN_CTRL_WP, docptr, |
| 297 | CDSNControl); |
| 298 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ |
| 299 | |
| 300 | /* Wait for it to be ready */ |
| 301 | return DoC_WaitReady(doc); |
| 302 | } |
| 303 | |
| 304 | /* DoC_SelectFloor: Select a given floor (bank of flash chips) */ |
| 305 | |
| 306 | static inline int DoC_SelectFloor(struct DiskOnChip *doc, int floor) |
| 307 | { |
| 308 | void __iomem *docptr = doc->virtadr; |
| 309 | |
| 310 | /* Select the floor (bank) of chips required */ |
| 311 | WriteDOC(floor, docptr, FloorSelect); |
| 312 | |
| 313 | /* Wait for the chip to be ready */ |
| 314 | return DoC_WaitReady(doc); |
| 315 | } |
| 316 | |
| 317 | /* DoC_IdentChip: Identify a given NAND chip given {floor,chip} */ |
| 318 | |
| 319 | static int DoC_IdentChip(struct DiskOnChip *doc, int floor, int chip) |
| 320 | { |
| 321 | int mfr, id, i, j; |
| 322 | volatile char dummy; |
| 323 | |
| 324 | /* Page in the required floor/chip */ |
| 325 | DoC_SelectFloor(doc, floor); |
| 326 | DoC_SelectChip(doc, chip); |
| 327 | |
| 328 | /* Reset the chip */ |
| 329 | if (DoC_Command(doc, NAND_CMD_RESET, CDSN_CTRL_WP)) { |
| 330 | DEBUG(MTD_DEBUG_LEVEL2, |
| 331 | "DoC_Command (reset) for %d,%d returned true\n", |
| 332 | floor, chip); |
| 333 | return 0; |
| 334 | } |
| 335 | |
| 336 | |
| 337 | /* Read the NAND chip ID: 1. Send ReadID command */ |
| 338 | if (DoC_Command(doc, NAND_CMD_READID, CDSN_CTRL_WP)) { |
| 339 | DEBUG(MTD_DEBUG_LEVEL2, |
| 340 | "DoC_Command (ReadID) for %d,%d returned true\n", |
| 341 | floor, chip); |
| 342 | return 0; |
| 343 | } |
| 344 | |
| 345 | /* Read the NAND chip ID: 2. Send address byte zero */ |
| 346 | DoC_Address(doc, ADDR_COLUMN, 0, CDSN_CTRL_WP, 0); |
| 347 | |
| 348 | /* Read the manufacturer and device id codes from the device */ |
| 349 | |
| 350 | if (DoC_is_Millennium(doc)) { |
| 351 | DoC_Delay(doc, 2); |
| 352 | dummy = ReadDOC(doc->virtadr, ReadPipeInit); |
| 353 | mfr = ReadDOC(doc->virtadr, LastDataRead); |
| 354 | |
| 355 | DoC_Delay(doc, 2); |
| 356 | dummy = ReadDOC(doc->virtadr, ReadPipeInit); |
| 357 | id = ReadDOC(doc->virtadr, LastDataRead); |
| 358 | } else { |
| 359 | /* CDSN Slow IO register see Software Req 11.4 item 5. */ |
| 360 | dummy = ReadDOC(doc->virtadr, CDSNSlowIO); |
| 361 | DoC_Delay(doc, 2); |
| 362 | mfr = ReadDOC_(doc->virtadr, doc->ioreg); |
| 363 | |
| 364 | /* CDSN Slow IO register see Software Req 11.4 item 5. */ |
| 365 | dummy = ReadDOC(doc->virtadr, CDSNSlowIO); |
| 366 | DoC_Delay(doc, 2); |
| 367 | id = ReadDOC_(doc->virtadr, doc->ioreg); |
| 368 | } |
| 369 | |
| 370 | /* No response - return failure */ |
| 371 | if (mfr == 0xff || mfr == 0) |
| 372 | return 0; |
| 373 | |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 374 | /* Check it's the same as the first chip we identified. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | * M-Systems say that any given DiskOnChip device should only |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 376 | * contain _one_ type of flash part, although that's not a |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | * hardware restriction. */ |
| 378 | if (doc->mfr) { |
| 379 | if (doc->mfr == mfr && doc->id == id) |
| 380 | return 1; /* This is another the same the first */ |
| 381 | else |
| 382 | printk(KERN_WARNING |
| 383 | "Flash chip at floor %d, chip %d is different:\n", |
| 384 | floor, chip); |
| 385 | } |
| 386 | |
| 387 | /* Print and store the manufacturer and ID codes. */ |
| 388 | for (i = 0; nand_flash_ids[i].name != NULL; i++) { |
| 389 | if (id == nand_flash_ids[i].id) { |
| 390 | /* Try to identify manufacturer */ |
| 391 | for (j = 0; nand_manuf_ids[j].id != 0x0; j++) { |
| 392 | if (nand_manuf_ids[j].id == mfr) |
| 393 | break; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 394 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | printk(KERN_INFO |
| 396 | "Flash chip found: Manufacturer ID: %2.2X, " |
| 397 | "Chip ID: %2.2X (%s:%s)\n", mfr, id, |
| 398 | nand_manuf_ids[j].name, nand_flash_ids[i].name); |
| 399 | if (!doc->mfr) { |
| 400 | doc->mfr = mfr; |
| 401 | doc->id = id; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 402 | doc->chipshift = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | ffs((nand_flash_ids[i].chipsize << 20)) - 1; |
| 404 | doc->page256 = (nand_flash_ids[i].pagesize == 256) ? 1 : 0; |
| 405 | doc->pageadrlen = doc->chipshift > 25 ? 3 : 2; |
| 406 | doc->erasesize = |
| 407 | nand_flash_ids[i].erasesize; |
| 408 | return 1; |
| 409 | } |
| 410 | return 0; |
| 411 | } |
| 412 | } |
| 413 | |
| 414 | |
| 415 | /* We haven't fully identified the chip. Print as much as we know. */ |
| 416 | printk(KERN_WARNING "Unknown flash chip found: %2.2X %2.2X\n", |
| 417 | id, mfr); |
| 418 | |
| 419 | printk(KERN_WARNING "Please report to dwmw2@infradead.org\n"); |
| 420 | return 0; |
| 421 | } |
| 422 | |
| 423 | /* DoC_ScanChips: Find all NAND chips present in a DiskOnChip, and identify them */ |
| 424 | |
| 425 | static void DoC_ScanChips(struct DiskOnChip *this, int maxchips) |
| 426 | { |
| 427 | int floor, chip; |
| 428 | int numchips[MAX_FLOORS]; |
| 429 | int ret = 1; |
| 430 | |
| 431 | this->numchips = 0; |
| 432 | this->mfr = 0; |
| 433 | this->id = 0; |
| 434 | |
| 435 | /* For each floor, find the number of valid chips it contains */ |
| 436 | for (floor = 0; floor < MAX_FLOORS; floor++) { |
| 437 | ret = 1; |
| 438 | numchips[floor] = 0; |
| 439 | for (chip = 0; chip < maxchips && ret != 0; chip++) { |
| 440 | |
| 441 | ret = DoC_IdentChip(this, floor, chip); |
| 442 | if (ret) { |
| 443 | numchips[floor]++; |
| 444 | this->numchips++; |
| 445 | } |
| 446 | } |
| 447 | } |
| 448 | |
| 449 | /* If there are none at all that we recognise, bail */ |
| 450 | if (!this->numchips) { |
| 451 | printk(KERN_NOTICE "No flash chips recognised.\n"); |
| 452 | return; |
| 453 | } |
| 454 | |
| 455 | /* Allocate an array to hold the information for each chip */ |
| 456 | this->chips = kmalloc(sizeof(struct Nand) * this->numchips, GFP_KERNEL); |
| 457 | if (!this->chips) { |
| 458 | printk(KERN_NOTICE "No memory for allocating chip info structures\n"); |
| 459 | return; |
| 460 | } |
| 461 | |
| 462 | ret = 0; |
| 463 | |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 464 | /* Fill out the chip array with {floor, chipno} for each |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | * detected chip in the device. */ |
| 466 | for (floor = 0; floor < MAX_FLOORS; floor++) { |
| 467 | for (chip = 0; chip < numchips[floor]; chip++) { |
| 468 | this->chips[ret].floor = floor; |
| 469 | this->chips[ret].chip = chip; |
| 470 | this->chips[ret].curadr = 0; |
| 471 | this->chips[ret].curmode = 0x50; |
| 472 | ret++; |
| 473 | } |
| 474 | } |
| 475 | |
| 476 | /* Calculate and print the total size of the device */ |
| 477 | this->totlen = this->numchips * (1 << this->chipshift); |
| 478 | |
| 479 | printk(KERN_INFO "%d flash chips found. Total DiskOnChip size: %ld MiB\n", |
| 480 | this->numchips, this->totlen >> 20); |
| 481 | } |
| 482 | |
| 483 | static int DoC2k_is_alias(struct DiskOnChip *doc1, struct DiskOnChip *doc2) |
| 484 | { |
| 485 | int tmp1, tmp2, retval; |
| 486 | if (doc1->physadr == doc2->physadr) |
| 487 | return 1; |
| 488 | |
| 489 | /* Use the alias resolution register which was set aside for this |
| 490 | * purpose. If it's value is the same on both chips, they might |
| 491 | * be the same chip, and we write to one and check for a change in |
| 492 | * the other. It's unclear if this register is usuable in the |
| 493 | * DoC 2000 (it's in the Millennium docs), but it seems to work. */ |
| 494 | tmp1 = ReadDOC(doc1->virtadr, AliasResolution); |
| 495 | tmp2 = ReadDOC(doc2->virtadr, AliasResolution); |
| 496 | if (tmp1 != tmp2) |
| 497 | return 0; |
| 498 | |
| 499 | WriteDOC((tmp1 + 1) % 0xff, doc1->virtadr, AliasResolution); |
| 500 | tmp2 = ReadDOC(doc2->virtadr, AliasResolution); |
| 501 | if (tmp2 == (tmp1 + 1) % 0xff) |
| 502 | retval = 1; |
| 503 | else |
| 504 | retval = 0; |
| 505 | |
| 506 | /* Restore register contents. May not be necessary, but do it just to |
| 507 | * be safe. */ |
| 508 | WriteDOC(tmp1, doc1->virtadr, AliasResolution); |
| 509 | |
| 510 | return retval; |
| 511 | } |
| 512 | |
David Woodhouse | 5e53542 | 2006-05-08 14:05:05 +0100 | [diff] [blame] | 513 | /* This routine is found from the docprobe code by symbol_get(), |
| 514 | * which will bump the use count of this module. */ |
| 515 | void DoC2k_init(struct mtd_info *mtd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | { |
| 517 | struct DiskOnChip *this = mtd->priv; |
| 518 | struct DiskOnChip *old = NULL; |
| 519 | int maxchips; |
| 520 | |
| 521 | /* We must avoid being called twice for the same device. */ |
| 522 | |
| 523 | if (doc2klist) |
| 524 | old = doc2klist->priv; |
| 525 | |
| 526 | while (old) { |
| 527 | if (DoC2k_is_alias(old, this)) { |
| 528 | printk(KERN_NOTICE |
| 529 | "Ignoring DiskOnChip 2000 at 0x%lX - already configured\n", |
| 530 | this->physadr); |
| 531 | iounmap(this->virtadr); |
| 532 | kfree(mtd); |
| 533 | return; |
| 534 | } |
| 535 | if (old->nextdoc) |
| 536 | old = old->nextdoc->priv; |
| 537 | else |
| 538 | old = NULL; |
| 539 | } |
| 540 | |
| 541 | |
| 542 | switch (this->ChipID) { |
| 543 | case DOC_ChipID_Doc2kTSOP: |
| 544 | mtd->name = "DiskOnChip 2000 TSOP"; |
| 545 | this->ioreg = DoC_Mil_CDSN_IO; |
| 546 | /* Pretend it's a Millennium */ |
| 547 | this->ChipID = DOC_ChipID_DocMil; |
| 548 | maxchips = MAX_CHIPS; |
| 549 | break; |
| 550 | case DOC_ChipID_Doc2k: |
| 551 | mtd->name = "DiskOnChip 2000"; |
| 552 | this->ioreg = DoC_2k_CDSN_IO; |
| 553 | maxchips = MAX_CHIPS; |
| 554 | break; |
| 555 | case DOC_ChipID_DocMil: |
| 556 | mtd->name = "DiskOnChip Millennium"; |
| 557 | this->ioreg = DoC_Mil_CDSN_IO; |
| 558 | maxchips = MAX_CHIPS_MIL; |
| 559 | break; |
| 560 | default: |
| 561 | printk("Unknown ChipID 0x%02x\n", this->ChipID); |
| 562 | kfree(mtd); |
| 563 | iounmap(this->virtadr); |
| 564 | return; |
| 565 | } |
| 566 | |
| 567 | printk(KERN_NOTICE "%s found at address 0x%lX\n", mtd->name, |
| 568 | this->physadr); |
| 569 | |
| 570 | mtd->type = MTD_NANDFLASH; |
| 571 | mtd->flags = MTD_CAP_NANDFLASH; |
| 572 | mtd->ecctype = MTD_ECC_RS_DiskOnChip; |
| 573 | mtd->size = 0; |
| 574 | mtd->erasesize = 0; |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 575 | mtd->writesize = 512; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | mtd->oobsize = 16; |
| 577 | mtd->owner = THIS_MODULE; |
| 578 | mtd->erase = doc_erase; |
| 579 | mtd->point = NULL; |
| 580 | mtd->unpoint = NULL; |
| 581 | mtd->read = doc_read; |
| 582 | mtd->write = doc_write; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | mtd->read_oob = doc_read_oob; |
| 584 | mtd->write_oob = doc_write_oob; |
| 585 | mtd->sync = NULL; |
| 586 | |
| 587 | this->totlen = 0; |
| 588 | this->numchips = 0; |
| 589 | |
| 590 | this->curfloor = -1; |
| 591 | this->curchip = -1; |
Ingo Molnar | 48b1926 | 2006-03-31 02:29:41 -0800 | [diff] [blame] | 592 | mutex_init(&this->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | |
| 594 | /* Ident all the chips present. */ |
| 595 | DoC_ScanChips(this, maxchips); |
| 596 | |
| 597 | if (!this->totlen) { |
| 598 | kfree(mtd); |
| 599 | iounmap(this->virtadr); |
| 600 | } else { |
| 601 | this->nextdoc = doc2klist; |
| 602 | doc2klist = mtd; |
| 603 | mtd->size = this->totlen; |
| 604 | mtd->erasesize = this->erasesize; |
| 605 | add_mtd_device(mtd); |
| 606 | return; |
| 607 | } |
| 608 | } |
David Woodhouse | 5e53542 | 2006-05-08 14:05:05 +0100 | [diff] [blame] | 609 | EXPORT_SYMBOL_GPL(DoC2k_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | |
| 611 | static int doc_read(struct mtd_info *mtd, loff_t from, size_t len, |
| 612 | size_t * retlen, u_char * buf) |
| 613 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | struct DiskOnChip *this = mtd->priv; |
| 615 | void __iomem *docptr = this->virtadr; |
| 616 | struct Nand *mychip; |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 617 | unsigned char syndrome[6], eccbuf[6]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | volatile char dummy; |
| 619 | int i, len256 = 0, ret=0; |
| 620 | size_t left = len; |
| 621 | |
| 622 | /* Don't allow read past end of device */ |
| 623 | if (from >= this->totlen) |
| 624 | return -EINVAL; |
| 625 | |
Ingo Molnar | 48b1926 | 2006-03-31 02:29:41 -0800 | [diff] [blame] | 626 | mutex_lock(&this->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | |
| 628 | *retlen = 0; |
| 629 | while (left) { |
| 630 | len = left; |
| 631 | |
| 632 | /* Don't allow a single read to cross a 512-byte block boundary */ |
| 633 | if (from + len > ((from | 0x1ff) + 1)) |
| 634 | len = ((from | 0x1ff) + 1) - from; |
| 635 | |
| 636 | /* The ECC will not be calculated correctly if less than 512 is read */ |
| 637 | if (len != 0x200 && eccbuf) |
| 638 | printk(KERN_WARNING |
| 639 | "ECC needs a full sector read (adr: %lx size %lx)\n", |
| 640 | (long) from, (long) len); |
| 641 | |
| 642 | /* printk("DoC_Read (adr: %lx size %lx)\n", (long) from, (long) len); */ |
| 643 | |
| 644 | |
| 645 | /* Find the chip which is to be used and select it */ |
| 646 | mychip = &this->chips[from >> (this->chipshift)]; |
| 647 | |
| 648 | if (this->curfloor != mychip->floor) { |
| 649 | DoC_SelectFloor(this, mychip->floor); |
| 650 | DoC_SelectChip(this, mychip->chip); |
| 651 | } else if (this->curchip != mychip->chip) { |
| 652 | DoC_SelectChip(this, mychip->chip); |
| 653 | } |
| 654 | |
| 655 | this->curfloor = mychip->floor; |
| 656 | this->curchip = mychip->chip; |
| 657 | |
| 658 | DoC_Command(this, |
| 659 | (!this->page256 |
| 660 | && (from & 0x100)) ? NAND_CMD_READ1 : NAND_CMD_READ0, |
| 661 | CDSN_CTRL_WP); |
| 662 | DoC_Address(this, ADDR_COLUMN_PAGE, from, CDSN_CTRL_WP, |
| 663 | CDSN_CTRL_ECC_IO); |
| 664 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 665 | /* Prime the ECC engine */ |
| 666 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); |
| 667 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | |
| 669 | /* treat crossing 256-byte sector for 2M x 8bits devices */ |
| 670 | if (this->page256 && from + len > (from | 0xff) + 1) { |
| 671 | len256 = (from | 0xff) + 1 - from; |
| 672 | DoC_ReadBuf(this, buf, len256); |
| 673 | |
| 674 | DoC_Command(this, NAND_CMD_READ0, CDSN_CTRL_WP); |
| 675 | DoC_Address(this, ADDR_COLUMN_PAGE, from + len256, |
| 676 | CDSN_CTRL_WP, CDSN_CTRL_ECC_IO); |
| 677 | } |
| 678 | |
| 679 | DoC_ReadBuf(this, &buf[len256], len - len256); |
| 680 | |
| 681 | /* Let the caller know we completed it */ |
| 682 | *retlen += len; |
| 683 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 684 | /* Read the ECC data through the DiskOnChip ECC logic */ |
| 685 | /* Note: this will work even with 2M x 8bit devices as */ |
| 686 | /* they have 8 bytes of OOB per 256 page. mf. */ |
| 687 | DoC_ReadBuf(this, eccbuf, 6); |
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 | /* Flush the pipeline */ |
| 690 | if (DoC_is_Millennium(this)) { |
| 691 | dummy = ReadDOC(docptr, ECCConf); |
| 692 | dummy = ReadDOC(docptr, ECCConf); |
| 693 | i = ReadDOC(docptr, ECCConf); |
| 694 | } else { |
| 695 | dummy = ReadDOC(docptr, 2k_ECCStatus); |
| 696 | dummy = ReadDOC(docptr, 2k_ECCStatus); |
| 697 | i = ReadDOC(docptr, 2k_ECCStatus); |
| 698 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 700 | /* Check the ECC Status */ |
| 701 | if (i & 0x80) { |
| 702 | int nb_errors; |
| 703 | /* There was an ECC error */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | #ifdef ECC_DEBUG |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 705 | printk(KERN_ERR "DiskOnChip ECC Error: Read at %lx\n", (long)from); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | #endif |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 707 | /* Read the ECC syndrom through the DiskOnChip ECC |
| 708 | logic. These syndrome will be all ZERO when there |
| 709 | is no error */ |
| 710 | for (i = 0; i < 6; i++) { |
| 711 | syndrome[i] = |
| 712 | ReadDOC(docptr, ECCSyndrome0 + i); |
| 713 | } |
| 714 | nb_errors = doc_decode_ecc(buf, syndrome); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | |
| 716 | #ifdef ECC_DEBUG |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 717 | printk(KERN_ERR "Errors corrected: %x\n", nb_errors); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | #endif |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 719 | if (nb_errors < 0) { |
| 720 | /* We return error, but have actually done the |
| 721 | read. Not that this can be told to |
| 722 | user-space, via sys_read(), but at least |
| 723 | MTD-aware stuff can know about it by |
| 724 | checking *retlen */ |
| 725 | ret = -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | } |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 727 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | |
| 729 | #ifdef PSYCHO_DEBUG |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 730 | printk(KERN_DEBUG "ECC DATA at %lxB: %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", |
| 731 | (long)from, eccbuf[0], eccbuf[1], eccbuf[2], |
| 732 | eccbuf[3], eccbuf[4], eccbuf[5]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | #endif |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 734 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 735 | /* disable the ECC engine */ |
| 736 | WriteDOC(DOC_ECC_DIS, docptr , ECCConf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 738 | /* according to 11.4.1, we need to wait for the busy line |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | * drop if we read to the end of the page. */ |
| 740 | if(0 == ((from + len) & 0x1ff)) |
| 741 | { |
| 742 | DoC_WaitReady(this); |
| 743 | } |
| 744 | |
| 745 | from += len; |
| 746 | left -= len; |
| 747 | buf += len; |
| 748 | } |
| 749 | |
Ingo Molnar | 48b1926 | 2006-03-31 02:29:41 -0800 | [diff] [blame] | 750 | mutex_unlock(&this->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | |
| 752 | return ret; |
| 753 | } |
| 754 | |
| 755 | static int doc_write(struct mtd_info *mtd, loff_t to, size_t len, |
| 756 | size_t * retlen, const u_char * buf) |
| 757 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | struct DiskOnChip *this = mtd->priv; |
| 759 | int di; /* Yes, DI is a hangover from when I was disassembling the binary driver */ |
| 760 | void __iomem *docptr = this->virtadr; |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 761 | unsigned char eccbuf[6]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | volatile char dummy; |
| 763 | int len256 = 0; |
| 764 | struct Nand *mychip; |
| 765 | size_t left = len; |
| 766 | int status; |
| 767 | |
| 768 | /* Don't allow write past end of device */ |
| 769 | if (to >= this->totlen) |
| 770 | return -EINVAL; |
| 771 | |
Ingo Molnar | 48b1926 | 2006-03-31 02:29:41 -0800 | [diff] [blame] | 772 | mutex_lock(&this->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | |
| 774 | *retlen = 0; |
| 775 | while (left) { |
| 776 | len = left; |
| 777 | |
| 778 | /* Don't allow a single write to cross a 512-byte block boundary */ |
| 779 | if (to + len > ((to | 0x1ff) + 1)) |
| 780 | len = ((to | 0x1ff) + 1) - to; |
| 781 | |
| 782 | /* The ECC will not be calculated correctly if less than 512 is written */ |
| 783 | /* DBB- |
| 784 | if (len != 0x200 && eccbuf) |
| 785 | printk(KERN_WARNING |
| 786 | "ECC needs a full sector write (adr: %lx size %lx)\n", |
| 787 | (long) to, (long) len); |
| 788 | -DBB */ |
| 789 | |
| 790 | /* printk("DoC_Write (adr: %lx size %lx)\n", (long) to, (long) len); */ |
| 791 | |
| 792 | /* Find the chip which is to be used and select it */ |
| 793 | mychip = &this->chips[to >> (this->chipshift)]; |
| 794 | |
| 795 | if (this->curfloor != mychip->floor) { |
| 796 | DoC_SelectFloor(this, mychip->floor); |
| 797 | DoC_SelectChip(this, mychip->chip); |
| 798 | } else if (this->curchip != mychip->chip) { |
| 799 | DoC_SelectChip(this, mychip->chip); |
| 800 | } |
| 801 | |
| 802 | this->curfloor = mychip->floor; |
| 803 | this->curchip = mychip->chip; |
| 804 | |
| 805 | /* Set device to main plane of flash */ |
| 806 | DoC_Command(this, NAND_CMD_RESET, CDSN_CTRL_WP); |
| 807 | DoC_Command(this, |
| 808 | (!this->page256 |
| 809 | && (to & 0x100)) ? NAND_CMD_READ1 : NAND_CMD_READ0, |
| 810 | CDSN_CTRL_WP); |
| 811 | |
| 812 | DoC_Command(this, NAND_CMD_SEQIN, 0); |
| 813 | DoC_Address(this, ADDR_COLUMN_PAGE, to, 0, CDSN_CTRL_ECC_IO); |
| 814 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 815 | /* Prime the ECC engine */ |
| 816 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); |
| 817 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | |
| 819 | /* treat crossing 256-byte sector for 2M x 8bits devices */ |
| 820 | if (this->page256 && to + len > (to | 0xff) + 1) { |
| 821 | len256 = (to | 0xff) + 1 - to; |
| 822 | DoC_WriteBuf(this, buf, len256); |
| 823 | |
| 824 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); |
| 825 | |
| 826 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); |
| 827 | /* There's an implicit DoC_WaitReady() in DoC_Command */ |
| 828 | |
| 829 | dummy = ReadDOC(docptr, CDSNSlowIO); |
| 830 | DoC_Delay(this, 2); |
| 831 | |
| 832 | if (ReadDOC_(docptr, this->ioreg) & 1) { |
| 833 | printk(KERN_ERR "Error programming flash\n"); |
| 834 | /* Error in programming */ |
| 835 | *retlen = 0; |
Ingo Molnar | 48b1926 | 2006-03-31 02:29:41 -0800 | [diff] [blame] | 836 | mutex_unlock(&this->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | return -EIO; |
| 838 | } |
| 839 | |
| 840 | DoC_Command(this, NAND_CMD_SEQIN, 0); |
| 841 | DoC_Address(this, ADDR_COLUMN_PAGE, to + len256, 0, |
| 842 | CDSN_CTRL_ECC_IO); |
| 843 | } |
| 844 | |
| 845 | DoC_WriteBuf(this, &buf[len256], len - len256); |
| 846 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 847 | WriteDOC(CDSN_CTRL_ECC_IO | CDSN_CTRL_CE, docptr, CDSNControl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 849 | if (DoC_is_Millennium(this)) { |
| 850 | WriteDOC(0, docptr, NOP); |
| 851 | WriteDOC(0, docptr, NOP); |
| 852 | WriteDOC(0, docptr, NOP); |
| 853 | } else { |
| 854 | WriteDOC_(0, docptr, this->ioreg); |
| 855 | WriteDOC_(0, docptr, this->ioreg); |
| 856 | WriteDOC_(0, docptr, this->ioreg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | } |
| 858 | |
Thomas Gleixner | 7f8a894 | 2006-06-28 10:11:33 +0200 | [diff] [blame] | 859 | WriteDOC(CDSN_CTRL_ECC_IO | CDSN_CTRL_FLASH_IO | CDSN_CTRL_CE, docptr, |
| 860 | CDSNControl); |
| 861 | |
| 862 | /* Read the ECC data through the DiskOnChip ECC logic */ |
| 863 | for (di = 0; di < 6; di++) { |
| 864 | eccbuf[di] = ReadDOC(docptr, ECCSyndrome0 + di); |
| 865 | } |
| 866 | |
| 867 | /* Reset the ECC engine */ |
| 868 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); |
| 869 | |
| 870 | #ifdef PSYCHO_DEBUG |
| 871 | printk |
| 872 | ("OOB data at %lx is %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", |
| 873 | (long) to, eccbuf[0], eccbuf[1], eccbuf[2], eccbuf[3], |
| 874 | eccbuf[4], eccbuf[5]); |
| 875 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); |
| 877 | |
| 878 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); |
| 879 | /* There's an implicit DoC_WaitReady() in DoC_Command */ |
| 880 | |
| 881 | if (DoC_is_Millennium(this)) { |
| 882 | ReadDOC(docptr, ReadPipeInit); |
| 883 | status = ReadDOC(docptr, LastDataRead); |
| 884 | } else { |
| 885 | dummy = ReadDOC(docptr, CDSNSlowIO); |
| 886 | DoC_Delay(this, 2); |
| 887 | status = ReadDOC_(docptr, this->ioreg); |
| 888 | } |
| 889 | |
| 890 | if (status & 1) { |
| 891 | printk(KERN_ERR "Error programming flash\n"); |
| 892 | /* Error in programming */ |
| 893 | *retlen = 0; |
Ingo Molnar | 48b1926 | 2006-03-31 02:29:41 -0800 | [diff] [blame] | 894 | mutex_unlock(&this->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | return -EIO; |
| 896 | } |
| 897 | |
| 898 | /* Let the caller know we completed it */ |
| 899 | *retlen += len; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 900 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | if (eccbuf) { |
| 902 | unsigned char x[8]; |
| 903 | size_t dummy; |
| 904 | int ret; |
| 905 | |
| 906 | /* Write the ECC data to flash */ |
| 907 | for (di=0; di<6; di++) |
| 908 | x[di] = eccbuf[di]; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 909 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | x[6]=0x55; |
| 911 | x[7]=0x55; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 912 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | ret = doc_write_oob_nolock(mtd, to, 8, &dummy, x); |
| 914 | if (ret) { |
Ingo Molnar | 48b1926 | 2006-03-31 02:29:41 -0800 | [diff] [blame] | 915 | mutex_unlock(&this->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | return ret; |
| 917 | } |
| 918 | } |
| 919 | |
| 920 | to += len; |
| 921 | left -= len; |
| 922 | buf += len; |
| 923 | } |
| 924 | |
Ingo Molnar | 48b1926 | 2006-03-31 02:29:41 -0800 | [diff] [blame] | 925 | mutex_unlock(&this->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | return 0; |
| 927 | } |
| 928 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 929 | static int doc_read_oob(struct mtd_info *mtd, loff_t ofs, |
| 930 | struct mtd_oob_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | { |
| 932 | struct DiskOnChip *this = mtd->priv; |
| 933 | int len256 = 0, ret; |
| 934 | struct Nand *mychip; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 935 | uint8_t *buf = ops->oobbuf; |
| 936 | size_t len = ops->len; |
| 937 | |
| 938 | BUG_ON(ops->mode != MTD_OOB_PLACE); |
| 939 | |
| 940 | ofs += ops->ooboffs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | |
Ingo Molnar | 48b1926 | 2006-03-31 02:29:41 -0800 | [diff] [blame] | 942 | mutex_lock(&this->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | |
| 944 | mychip = &this->chips[ofs >> this->chipshift]; |
| 945 | |
| 946 | if (this->curfloor != mychip->floor) { |
| 947 | DoC_SelectFloor(this, mychip->floor); |
| 948 | DoC_SelectChip(this, mychip->chip); |
| 949 | } else if (this->curchip != mychip->chip) { |
| 950 | DoC_SelectChip(this, mychip->chip); |
| 951 | } |
| 952 | this->curfloor = mychip->floor; |
| 953 | this->curchip = mychip->chip; |
| 954 | |
| 955 | /* update address for 2M x 8bit devices. OOB starts on the second */ |
| 956 | /* page to maintain compatibility with doc_read_ecc. */ |
| 957 | if (this->page256) { |
| 958 | if (!(ofs & 0x8)) |
| 959 | ofs += 0x100; |
| 960 | else |
| 961 | ofs -= 0x8; |
| 962 | } |
| 963 | |
| 964 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); |
| 965 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs, CDSN_CTRL_WP, 0); |
| 966 | |
| 967 | /* treat crossing 8-byte OOB data for 2M x 8bit devices */ |
| 968 | /* Note: datasheet says it should automaticaly wrap to the */ |
| 969 | /* next OOB block, but it didn't work here. mf. */ |
| 970 | if (this->page256 && ofs + len > (ofs | 0x7) + 1) { |
| 971 | len256 = (ofs | 0x7) + 1 - ofs; |
| 972 | DoC_ReadBuf(this, buf, len256); |
| 973 | |
| 974 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); |
| 975 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs & (~0x1ff), |
| 976 | CDSN_CTRL_WP, 0); |
| 977 | } |
| 978 | |
| 979 | DoC_ReadBuf(this, &buf[len256], len - len256); |
| 980 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 981 | ops->retlen = len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | /* Reading the full OOB data drops us off of the end of the page, |
| 983 | * causing the flash device to go into busy mode, so we need |
| 984 | * to wait until ready 11.4.1 and Toshiba TC58256FT docs */ |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 985 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | ret = DoC_WaitReady(this); |
| 987 | |
Ingo Molnar | 48b1926 | 2006-03-31 02:29:41 -0800 | [diff] [blame] | 988 | mutex_unlock(&this->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | return ret; |
| 990 | |
| 991 | } |
| 992 | |
| 993 | static int doc_write_oob_nolock(struct mtd_info *mtd, loff_t ofs, size_t len, |
| 994 | size_t * retlen, const u_char * buf) |
| 995 | { |
| 996 | struct DiskOnChip *this = mtd->priv; |
| 997 | int len256 = 0; |
| 998 | void __iomem *docptr = this->virtadr; |
| 999 | struct Nand *mychip = &this->chips[ofs >> this->chipshift]; |
| 1000 | volatile int dummy; |
| 1001 | int status; |
| 1002 | |
| 1003 | // printk("doc_write_oob(%lx, %d): %2.2X %2.2X %2.2X %2.2X ... %2.2X %2.2X .. %2.2X %2.2X\n",(long)ofs, len, |
| 1004 | // buf[0], buf[1], buf[2], buf[3], buf[8], buf[9], buf[14],buf[15]); |
| 1005 | |
| 1006 | /* Find the chip which is to be used and select it */ |
| 1007 | if (this->curfloor != mychip->floor) { |
| 1008 | DoC_SelectFloor(this, mychip->floor); |
| 1009 | DoC_SelectChip(this, mychip->chip); |
| 1010 | } else if (this->curchip != mychip->chip) { |
| 1011 | DoC_SelectChip(this, mychip->chip); |
| 1012 | } |
| 1013 | this->curfloor = mychip->floor; |
| 1014 | this->curchip = mychip->chip; |
| 1015 | |
| 1016 | /* disable the ECC engine */ |
| 1017 | WriteDOC (DOC_ECC_RESET, docptr, ECCConf); |
| 1018 | WriteDOC (DOC_ECC_DIS, docptr, ECCConf); |
| 1019 | |
| 1020 | /* Reset the chip, see Software Requirement 11.4 item 1. */ |
| 1021 | DoC_Command(this, NAND_CMD_RESET, CDSN_CTRL_WP); |
| 1022 | |
| 1023 | /* issue the Read2 command to set the pointer to the Spare Data Area. */ |
| 1024 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); |
| 1025 | |
| 1026 | /* update address for 2M x 8bit devices. OOB starts on the second */ |
| 1027 | /* page to maintain compatibility with doc_read_ecc. */ |
| 1028 | if (this->page256) { |
| 1029 | if (!(ofs & 0x8)) |
| 1030 | ofs += 0x100; |
| 1031 | else |
| 1032 | ofs -= 0x8; |
| 1033 | } |
| 1034 | |
| 1035 | /* issue the Serial Data In command to initial the Page Program process */ |
| 1036 | DoC_Command(this, NAND_CMD_SEQIN, 0); |
| 1037 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs, 0, 0); |
| 1038 | |
| 1039 | /* treat crossing 8-byte OOB data for 2M x 8bit devices */ |
| 1040 | /* Note: datasheet says it should automaticaly wrap to the */ |
| 1041 | /* next OOB block, but it didn't work here. mf. */ |
| 1042 | if (this->page256 && ofs + len > (ofs | 0x7) + 1) { |
| 1043 | len256 = (ofs | 0x7) + 1 - ofs; |
| 1044 | DoC_WriteBuf(this, buf, len256); |
| 1045 | |
| 1046 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); |
| 1047 | DoC_Command(this, NAND_CMD_STATUS, 0); |
| 1048 | /* DoC_WaitReady() is implicit in DoC_Command */ |
| 1049 | |
| 1050 | if (DoC_is_Millennium(this)) { |
| 1051 | ReadDOC(docptr, ReadPipeInit); |
| 1052 | status = ReadDOC(docptr, LastDataRead); |
| 1053 | } else { |
| 1054 | dummy = ReadDOC(docptr, CDSNSlowIO); |
| 1055 | DoC_Delay(this, 2); |
| 1056 | status = ReadDOC_(docptr, this->ioreg); |
| 1057 | } |
| 1058 | |
| 1059 | if (status & 1) { |
| 1060 | printk(KERN_ERR "Error programming oob data\n"); |
| 1061 | /* There was an error */ |
| 1062 | *retlen = 0; |
| 1063 | return -EIO; |
| 1064 | } |
| 1065 | DoC_Command(this, NAND_CMD_SEQIN, 0); |
| 1066 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs & (~0x1ff), 0, 0); |
| 1067 | } |
| 1068 | |
| 1069 | DoC_WriteBuf(this, &buf[len256], len - len256); |
| 1070 | |
| 1071 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); |
| 1072 | DoC_Command(this, NAND_CMD_STATUS, 0); |
| 1073 | /* DoC_WaitReady() is implicit in DoC_Command */ |
| 1074 | |
| 1075 | if (DoC_is_Millennium(this)) { |
| 1076 | ReadDOC(docptr, ReadPipeInit); |
| 1077 | status = ReadDOC(docptr, LastDataRead); |
| 1078 | } else { |
| 1079 | dummy = ReadDOC(docptr, CDSNSlowIO); |
| 1080 | DoC_Delay(this, 2); |
| 1081 | status = ReadDOC_(docptr, this->ioreg); |
| 1082 | } |
| 1083 | |
| 1084 | if (status & 1) { |
| 1085 | printk(KERN_ERR "Error programming oob data\n"); |
| 1086 | /* There was an error */ |
| 1087 | *retlen = 0; |
| 1088 | return -EIO; |
| 1089 | } |
| 1090 | |
| 1091 | *retlen = len; |
| 1092 | return 0; |
| 1093 | |
| 1094 | } |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 1095 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 1096 | static int doc_write_oob(struct mtd_info *mtd, loff_t ofs, |
| 1097 | struct mtd_oob_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | { |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 1099 | struct DiskOnChip *this = mtd->priv; |
| 1100 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 1102 | BUG_ON(ops->mode != MTD_OOB_PLACE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 1104 | mutex_lock(&this->lock); |
| 1105 | ret = doc_write_oob_nolock(mtd, ofs + ops->ooboffs, ops->len, |
| 1106 | &ops->retlen, ops->oobbuf); |
| 1107 | |
| 1108 | mutex_unlock(&this->lock); |
| 1109 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | } |
| 1111 | |
| 1112 | static int doc_erase(struct mtd_info *mtd, struct erase_info *instr) |
| 1113 | { |
| 1114 | struct DiskOnChip *this = mtd->priv; |
| 1115 | __u32 ofs = instr->addr; |
| 1116 | __u32 len = instr->len; |
| 1117 | volatile int dummy; |
| 1118 | void __iomem *docptr = this->virtadr; |
| 1119 | struct Nand *mychip; |
| 1120 | int status; |
| 1121 | |
Ingo Molnar | 48b1926 | 2006-03-31 02:29:41 -0800 | [diff] [blame] | 1122 | mutex_lock(&this->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | |
| 1124 | if (ofs & (mtd->erasesize-1) || len & (mtd->erasesize-1)) { |
Ingo Molnar | 48b1926 | 2006-03-31 02:29:41 -0800 | [diff] [blame] | 1125 | mutex_unlock(&this->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | return -EINVAL; |
| 1127 | } |
| 1128 | |
| 1129 | instr->state = MTD_ERASING; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 1130 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | /* FIXME: Do this in the background. Use timers or schedule_task() */ |
| 1132 | while(len) { |
| 1133 | mychip = &this->chips[ofs >> this->chipshift]; |
| 1134 | |
| 1135 | if (this->curfloor != mychip->floor) { |
| 1136 | DoC_SelectFloor(this, mychip->floor); |
| 1137 | DoC_SelectChip(this, mychip->chip); |
| 1138 | } else if (this->curchip != mychip->chip) { |
| 1139 | DoC_SelectChip(this, mychip->chip); |
| 1140 | } |
| 1141 | this->curfloor = mychip->floor; |
| 1142 | this->curchip = mychip->chip; |
| 1143 | |
| 1144 | DoC_Command(this, NAND_CMD_ERASE1, 0); |
| 1145 | DoC_Address(this, ADDR_PAGE, ofs, 0, 0); |
| 1146 | DoC_Command(this, NAND_CMD_ERASE2, 0); |
| 1147 | |
| 1148 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); |
| 1149 | |
| 1150 | if (DoC_is_Millennium(this)) { |
| 1151 | ReadDOC(docptr, ReadPipeInit); |
| 1152 | status = ReadDOC(docptr, LastDataRead); |
| 1153 | } else { |
| 1154 | dummy = ReadDOC(docptr, CDSNSlowIO); |
| 1155 | DoC_Delay(this, 2); |
| 1156 | status = ReadDOC_(docptr, this->ioreg); |
| 1157 | } |
| 1158 | |
| 1159 | if (status & 1) { |
| 1160 | printk(KERN_ERR "Error erasing at 0x%x\n", ofs); |
| 1161 | /* There was an error */ |
| 1162 | instr->state = MTD_ERASE_FAILED; |
| 1163 | goto callback; |
| 1164 | } |
| 1165 | ofs += mtd->erasesize; |
| 1166 | len -= mtd->erasesize; |
| 1167 | } |
| 1168 | instr->state = MTD_ERASE_DONE; |
| 1169 | |
| 1170 | callback: |
| 1171 | mtd_erase_callback(instr); |
| 1172 | |
Ingo Molnar | 48b1926 | 2006-03-31 02:29:41 -0800 | [diff] [blame] | 1173 | mutex_unlock(&this->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | return 0; |
| 1175 | } |
| 1176 | |
| 1177 | |
| 1178 | /**************************************************************************** |
| 1179 | * |
| 1180 | * Module stuff |
| 1181 | * |
| 1182 | ****************************************************************************/ |
| 1183 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | static void __exit cleanup_doc2000(void) |
| 1185 | { |
| 1186 | struct mtd_info *mtd; |
| 1187 | struct DiskOnChip *this; |
| 1188 | |
| 1189 | while ((mtd = doc2klist)) { |
| 1190 | this = mtd->priv; |
| 1191 | doc2klist = this->nextdoc; |
| 1192 | |
| 1193 | del_mtd_device(mtd); |
| 1194 | |
| 1195 | iounmap(this->virtadr); |
| 1196 | kfree(this->chips); |
| 1197 | kfree(mtd); |
| 1198 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | } |
| 1200 | |
| 1201 | module_exit(cleanup_doc2000); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | |
| 1203 | MODULE_LICENSE("GPL"); |
| 1204 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org> et al."); |
| 1205 | MODULE_DESCRIPTION("MTD driver for DiskOnChip 2000 and Millennium"); |
| 1206 | |