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1da177e4 LT |
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 | * | |
e5580fbe | 7 | * $Id: doc2000.c,v 1.67 2005/11/07 11:14:24 gleixner Exp $ |
1da177e4 LT |
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> | |
040d79f9 | 23 | #include <linux/mutex.h> |
1da177e4 LT |
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); | |
58 | static int doc_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, | |
59 | size_t *retlen, u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel); | |
60 | static int doc_write_ecc(struct mtd_info *mtd, loff_t to, size_t len, | |
61 | size_t *retlen, const u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel); | |
8593fbc6 TG |
62 | static int doc_read_oob(struct mtd_info *mtd, loff_t ofs, |
63 | struct mtd_oob_ops *ops); | |
64 | static int doc_write_oob(struct mtd_info *mtd, loff_t ofs, | |
65 | struct mtd_oob_ops *ops); | |
1da177e4 LT |
66 | static int doc_write_oob_nolock(struct mtd_info *mtd, loff_t ofs, size_t len, |
67 | size_t *retlen, const u_char *buf); | |
68 | static int doc_erase (struct mtd_info *mtd, struct erase_info *instr); | |
69 | ||
70 | static struct mtd_info *doc2klist = NULL; | |
71 | ||
72 | /* Perform the required delay cycles by reading from the appropriate register */ | |
73 | static void DoC_Delay(struct DiskOnChip *doc, unsigned short cycles) | |
74 | { | |
75 | volatile char dummy; | |
76 | int i; | |
e5580fbe | 77 | |
1da177e4 LT |
78 | for (i = 0; i < cycles; i++) { |
79 | if (DoC_is_Millennium(doc)) | |
80 | dummy = ReadDOC(doc->virtadr, NOP); | |
81 | else | |
82 | dummy = ReadDOC(doc->virtadr, DOCStatus); | |
83 | } | |
e5580fbe | 84 | |
1da177e4 LT |
85 | } |
86 | ||
87 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
88 | static int _DoC_WaitReady(struct DiskOnChip *doc) | |
89 | { | |
90 | void __iomem *docptr = doc->virtadr; | |
91 | unsigned long timeo = jiffies + (HZ * 10); | |
92 | ||
93 | DEBUG(MTD_DEBUG_LEVEL3, | |
94 | "_DoC_WaitReady called for out-of-line wait\n"); | |
95 | ||
96 | /* Out-of-line routine to wait for chip response */ | |
97 | while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
98 | /* issue 2 read from NOP register after reading from CDSNControl register | |
99 | see Software Requirement 11.4 item 2. */ | |
100 | DoC_Delay(doc, 2); | |
101 | ||
102 | if (time_after(jiffies, timeo)) { | |
103 | DEBUG(MTD_DEBUG_LEVEL2, "_DoC_WaitReady timed out.\n"); | |
104 | return -EIO; | |
105 | } | |
106 | udelay(1); | |
107 | cond_resched(); | |
108 | } | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
113 | static inline int DoC_WaitReady(struct DiskOnChip *doc) | |
114 | { | |
115 | void __iomem *docptr = doc->virtadr; | |
116 | ||
117 | /* This is inline, to optimise the common case, where it's ready instantly */ | |
118 | int ret = 0; | |
119 | ||
120 | /* 4 read form NOP register should be issued in prior to the read from CDSNControl | |
121 | see Software Requirement 11.4 item 2. */ | |
122 | DoC_Delay(doc, 4); | |
123 | ||
124 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) | |
125 | /* Call the out-of-line routine to wait */ | |
126 | ret = _DoC_WaitReady(doc); | |
127 | ||
128 | /* issue 2 read from NOP register after reading from CDSNControl register | |
129 | see Software Requirement 11.4 item 2. */ | |
130 | DoC_Delay(doc, 2); | |
131 | ||
132 | return ret; | |
133 | } | |
134 | ||
135 | /* DoC_Command: Send a flash command to the flash chip through the CDSN Slow IO register to | |
136 | bypass the internal pipeline. Each of 4 delay cycles (read from the NOP register) is | |
137 | required after writing to CDSN Control register, see Software Requirement 11.4 item 3. */ | |
138 | ||
858119e1 | 139 | static int DoC_Command(struct DiskOnChip *doc, unsigned char command, |
1da177e4 LT |
140 | unsigned char xtraflags) |
141 | { | |
142 | void __iomem *docptr = doc->virtadr; | |
143 | ||
144 | if (DoC_is_2000(doc)) | |
145 | xtraflags |= CDSN_CTRL_FLASH_IO; | |
146 | ||
147 | /* Assert the CLE (Command Latch Enable) line to the flash chip */ | |
148 | WriteDOC(xtraflags | CDSN_CTRL_CLE | CDSN_CTRL_CE, docptr, CDSNControl); | |
149 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
150 | ||
151 | if (DoC_is_Millennium(doc)) | |
152 | WriteDOC(command, docptr, CDSNSlowIO); | |
153 | ||
154 | /* Send the command */ | |
155 | WriteDOC_(command, docptr, doc->ioreg); | |
156 | if (DoC_is_Millennium(doc)) | |
157 | WriteDOC(command, docptr, WritePipeTerm); | |
158 | ||
159 | /* Lower the CLE line */ | |
160 | WriteDOC(xtraflags | CDSN_CTRL_CE, docptr, CDSNControl); | |
161 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
162 | ||
163 | /* Wait for the chip to respond - Software requirement 11.4.1 (extended for any command) */ | |
164 | return DoC_WaitReady(doc); | |
165 | } | |
166 | ||
167 | /* DoC_Address: Set the current address for the flash chip through the CDSN Slow IO register to | |
168 | bypass the internal pipeline. Each of 4 delay cycles (read from the NOP register) is | |
169 | required after writing to CDSN Control register, see Software Requirement 11.4 item 3. */ | |
170 | ||
171 | static int DoC_Address(struct DiskOnChip *doc, int numbytes, unsigned long ofs, | |
172 | unsigned char xtraflags1, unsigned char xtraflags2) | |
173 | { | |
174 | int i; | |
175 | void __iomem *docptr = doc->virtadr; | |
176 | ||
177 | if (DoC_is_2000(doc)) | |
178 | xtraflags1 |= CDSN_CTRL_FLASH_IO; | |
179 | ||
180 | /* Assert the ALE (Address Latch Enable) line to the flash chip */ | |
181 | WriteDOC(xtraflags1 | CDSN_CTRL_ALE | CDSN_CTRL_CE, docptr, CDSNControl); | |
182 | ||
183 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
184 | ||
185 | /* Send the address */ | |
186 | /* Devices with 256-byte page are addressed as: | |
187 | Column (bits 0-7), Page (bits 8-15, 16-23, 24-31) | |
188 | * there is no device on the market with page256 | |
189 | and more than 24 bits. | |
190 | Devices with 512-byte page are addressed as: | |
191 | Column (bits 0-7), Page (bits 9-16, 17-24, 25-31) | |
192 | * 25-31 is sent only if the chip support it. | |
193 | * bit 8 changes the read command to be sent | |
194 | (NAND_CMD_READ0 or NAND_CMD_READ1). | |
195 | */ | |
196 | ||
197 | if (numbytes == ADDR_COLUMN || numbytes == ADDR_COLUMN_PAGE) { | |
198 | if (DoC_is_Millennium(doc)) | |
199 | WriteDOC(ofs & 0xff, docptr, CDSNSlowIO); | |
200 | WriteDOC_(ofs & 0xff, docptr, doc->ioreg); | |
201 | } | |
202 | ||
203 | if (doc->page256) { | |
204 | ofs = ofs >> 8; | |
205 | } else { | |
206 | ofs = ofs >> 9; | |
207 | } | |
208 | ||
209 | if (numbytes == ADDR_PAGE || numbytes == ADDR_COLUMN_PAGE) { | |
210 | for (i = 0; i < doc->pageadrlen; i++, ofs = ofs >> 8) { | |
211 | if (DoC_is_Millennium(doc)) | |
212 | WriteDOC(ofs & 0xff, docptr, CDSNSlowIO); | |
213 | WriteDOC_(ofs & 0xff, docptr, doc->ioreg); | |
214 | } | |
215 | } | |
216 | ||
217 | if (DoC_is_Millennium(doc)) | |
218 | WriteDOC(ofs & 0xff, docptr, WritePipeTerm); | |
219 | ||
220 | DoC_Delay(doc, 2); /* Needed for some slow flash chips. mf. */ | |
e5580fbe TG |
221 | |
222 | /* FIXME: The SlowIO's for millennium could be replaced by | |
1da177e4 LT |
223 | a single WritePipeTerm here. mf. */ |
224 | ||
225 | /* Lower the ALE line */ | |
226 | WriteDOC(xtraflags1 | xtraflags2 | CDSN_CTRL_CE, docptr, | |
227 | CDSNControl); | |
228 | ||
229 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
230 | ||
231 | /* Wait for the chip to respond - Software requirement 11.4.1 */ | |
232 | return DoC_WaitReady(doc); | |
233 | } | |
234 | ||
235 | /* Read a buffer from DoC, taking care of Millennium odditys */ | |
236 | static void DoC_ReadBuf(struct DiskOnChip *doc, u_char * buf, int len) | |
237 | { | |
238 | volatile int dummy; | |
239 | int modulus = 0xffff; | |
240 | void __iomem *docptr = doc->virtadr; | |
241 | int i; | |
242 | ||
243 | if (len <= 0) | |
244 | return; | |
245 | ||
246 | if (DoC_is_Millennium(doc)) { | |
247 | /* Read the data via the internal pipeline through CDSN IO register, | |
248 | see Pipelined Read Operations 11.3 */ | |
249 | dummy = ReadDOC(docptr, ReadPipeInit); | |
250 | ||
251 | /* Millennium should use the LastDataRead register - Pipeline Reads */ | |
252 | len--; | |
253 | ||
254 | /* This is needed for correctly ECC calculation */ | |
255 | modulus = 0xff; | |
256 | } | |
257 | ||
258 | for (i = 0; i < len; i++) | |
259 | buf[i] = ReadDOC_(docptr, doc->ioreg + (i & modulus)); | |
260 | ||
261 | if (DoC_is_Millennium(doc)) { | |
262 | buf[i] = ReadDOC(docptr, LastDataRead); | |
263 | } | |
264 | } | |
265 | ||
266 | /* Write a buffer to DoC, taking care of Millennium odditys */ | |
267 | static void DoC_WriteBuf(struct DiskOnChip *doc, const u_char * buf, int len) | |
268 | { | |
269 | void __iomem *docptr = doc->virtadr; | |
270 | int i; | |
271 | ||
272 | if (len <= 0) | |
273 | return; | |
274 | ||
275 | for (i = 0; i < len; i++) | |
276 | WriteDOC_(buf[i], docptr, doc->ioreg + i); | |
277 | ||
278 | if (DoC_is_Millennium(doc)) { | |
279 | WriteDOC(0x00, docptr, WritePipeTerm); | |
280 | } | |
281 | } | |
282 | ||
283 | ||
284 | /* DoC_SelectChip: Select a given flash chip within the current floor */ | |
285 | ||
286 | static inline int DoC_SelectChip(struct DiskOnChip *doc, int chip) | |
287 | { | |
288 | void __iomem *docptr = doc->virtadr; | |
289 | ||
290 | /* Software requirement 11.4.4 before writing DeviceSelect */ | |
291 | /* Deassert the CE line to eliminate glitches on the FCE# outputs */ | |
292 | WriteDOC(CDSN_CTRL_WP, docptr, CDSNControl); | |
293 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
294 | ||
295 | /* Select the individual flash chip requested */ | |
296 | WriteDOC(chip, docptr, CDSNDeviceSelect); | |
297 | DoC_Delay(doc, 4); | |
298 | ||
299 | /* Reassert the CE line */ | |
300 | WriteDOC(CDSN_CTRL_CE | CDSN_CTRL_FLASH_IO | CDSN_CTRL_WP, docptr, | |
301 | CDSNControl); | |
302 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
303 | ||
304 | /* Wait for it to be ready */ | |
305 | return DoC_WaitReady(doc); | |
306 | } | |
307 | ||
308 | /* DoC_SelectFloor: Select a given floor (bank of flash chips) */ | |
309 | ||
310 | static inline int DoC_SelectFloor(struct DiskOnChip *doc, int floor) | |
311 | { | |
312 | void __iomem *docptr = doc->virtadr; | |
313 | ||
314 | /* Select the floor (bank) of chips required */ | |
315 | WriteDOC(floor, docptr, FloorSelect); | |
316 | ||
317 | /* Wait for the chip to be ready */ | |
318 | return DoC_WaitReady(doc); | |
319 | } | |
320 | ||
321 | /* DoC_IdentChip: Identify a given NAND chip given {floor,chip} */ | |
322 | ||
323 | static int DoC_IdentChip(struct DiskOnChip *doc, int floor, int chip) | |
324 | { | |
325 | int mfr, id, i, j; | |
326 | volatile char dummy; | |
327 | ||
328 | /* Page in the required floor/chip */ | |
329 | DoC_SelectFloor(doc, floor); | |
330 | DoC_SelectChip(doc, chip); | |
331 | ||
332 | /* Reset the chip */ | |
333 | if (DoC_Command(doc, NAND_CMD_RESET, CDSN_CTRL_WP)) { | |
334 | DEBUG(MTD_DEBUG_LEVEL2, | |
335 | "DoC_Command (reset) for %d,%d returned true\n", | |
336 | floor, chip); | |
337 | return 0; | |
338 | } | |
339 | ||
340 | ||
341 | /* Read the NAND chip ID: 1. Send ReadID command */ | |
342 | if (DoC_Command(doc, NAND_CMD_READID, CDSN_CTRL_WP)) { | |
343 | DEBUG(MTD_DEBUG_LEVEL2, | |
344 | "DoC_Command (ReadID) for %d,%d returned true\n", | |
345 | floor, chip); | |
346 | return 0; | |
347 | } | |
348 | ||
349 | /* Read the NAND chip ID: 2. Send address byte zero */ | |
350 | DoC_Address(doc, ADDR_COLUMN, 0, CDSN_CTRL_WP, 0); | |
351 | ||
352 | /* Read the manufacturer and device id codes from the device */ | |
353 | ||
354 | if (DoC_is_Millennium(doc)) { | |
355 | DoC_Delay(doc, 2); | |
356 | dummy = ReadDOC(doc->virtadr, ReadPipeInit); | |
357 | mfr = ReadDOC(doc->virtadr, LastDataRead); | |
358 | ||
359 | DoC_Delay(doc, 2); | |
360 | dummy = ReadDOC(doc->virtadr, ReadPipeInit); | |
361 | id = ReadDOC(doc->virtadr, LastDataRead); | |
362 | } else { | |
363 | /* CDSN Slow IO register see Software Req 11.4 item 5. */ | |
364 | dummy = ReadDOC(doc->virtadr, CDSNSlowIO); | |
365 | DoC_Delay(doc, 2); | |
366 | mfr = ReadDOC_(doc->virtadr, doc->ioreg); | |
367 | ||
368 | /* CDSN Slow IO register see Software Req 11.4 item 5. */ | |
369 | dummy = ReadDOC(doc->virtadr, CDSNSlowIO); | |
370 | DoC_Delay(doc, 2); | |
371 | id = ReadDOC_(doc->virtadr, doc->ioreg); | |
372 | } | |
373 | ||
374 | /* No response - return failure */ | |
375 | if (mfr == 0xff || mfr == 0) | |
376 | return 0; | |
377 | ||
e5580fbe | 378 | /* Check it's the same as the first chip we identified. |
1da177e4 | 379 | * M-Systems say that any given DiskOnChip device should only |
e5580fbe | 380 | * contain _one_ type of flash part, although that's not a |
1da177e4 LT |
381 | * hardware restriction. */ |
382 | if (doc->mfr) { | |
383 | if (doc->mfr == mfr && doc->id == id) | |
384 | return 1; /* This is another the same the first */ | |
385 | else | |
386 | printk(KERN_WARNING | |
387 | "Flash chip at floor %d, chip %d is different:\n", | |
388 | floor, chip); | |
389 | } | |
390 | ||
391 | /* Print and store the manufacturer and ID codes. */ | |
392 | for (i = 0; nand_flash_ids[i].name != NULL; i++) { | |
393 | if (id == nand_flash_ids[i].id) { | |
394 | /* Try to identify manufacturer */ | |
395 | for (j = 0; nand_manuf_ids[j].id != 0x0; j++) { | |
396 | if (nand_manuf_ids[j].id == mfr) | |
397 | break; | |
e5580fbe | 398 | } |
1da177e4 LT |
399 | printk(KERN_INFO |
400 | "Flash chip found: Manufacturer ID: %2.2X, " | |
401 | "Chip ID: %2.2X (%s:%s)\n", mfr, id, | |
402 | nand_manuf_ids[j].name, nand_flash_ids[i].name); | |
403 | if (!doc->mfr) { | |
404 | doc->mfr = mfr; | |
405 | doc->id = id; | |
e5580fbe | 406 | doc->chipshift = |
1da177e4 LT |
407 | ffs((nand_flash_ids[i].chipsize << 20)) - 1; |
408 | doc->page256 = (nand_flash_ids[i].pagesize == 256) ? 1 : 0; | |
409 | doc->pageadrlen = doc->chipshift > 25 ? 3 : 2; | |
410 | doc->erasesize = | |
411 | nand_flash_ids[i].erasesize; | |
412 | return 1; | |
413 | } | |
414 | return 0; | |
415 | } | |
416 | } | |
417 | ||
418 | ||
419 | /* We haven't fully identified the chip. Print as much as we know. */ | |
420 | printk(KERN_WARNING "Unknown flash chip found: %2.2X %2.2X\n", | |
421 | id, mfr); | |
422 | ||
423 | printk(KERN_WARNING "Please report to dwmw2@infradead.org\n"); | |
424 | return 0; | |
425 | } | |
426 | ||
427 | /* DoC_ScanChips: Find all NAND chips present in a DiskOnChip, and identify them */ | |
428 | ||
429 | static void DoC_ScanChips(struct DiskOnChip *this, int maxchips) | |
430 | { | |
431 | int floor, chip; | |
432 | int numchips[MAX_FLOORS]; | |
433 | int ret = 1; | |
434 | ||
435 | this->numchips = 0; | |
436 | this->mfr = 0; | |
437 | this->id = 0; | |
438 | ||
439 | /* For each floor, find the number of valid chips it contains */ | |
440 | for (floor = 0; floor < MAX_FLOORS; floor++) { | |
441 | ret = 1; | |
442 | numchips[floor] = 0; | |
443 | for (chip = 0; chip < maxchips && ret != 0; chip++) { | |
444 | ||
445 | ret = DoC_IdentChip(this, floor, chip); | |
446 | if (ret) { | |
447 | numchips[floor]++; | |
448 | this->numchips++; | |
449 | } | |
450 | } | |
451 | } | |
452 | ||
453 | /* If there are none at all that we recognise, bail */ | |
454 | if (!this->numchips) { | |
455 | printk(KERN_NOTICE "No flash chips recognised.\n"); | |
456 | return; | |
457 | } | |
458 | ||
459 | /* Allocate an array to hold the information for each chip */ | |
460 | this->chips = kmalloc(sizeof(struct Nand) * this->numchips, GFP_KERNEL); | |
461 | if (!this->chips) { | |
462 | printk(KERN_NOTICE "No memory for allocating chip info structures\n"); | |
463 | return; | |
464 | } | |
465 | ||
466 | ret = 0; | |
467 | ||
e5580fbe | 468 | /* Fill out the chip array with {floor, chipno} for each |
1da177e4 LT |
469 | * detected chip in the device. */ |
470 | for (floor = 0; floor < MAX_FLOORS; floor++) { | |
471 | for (chip = 0; chip < numchips[floor]; chip++) { | |
472 | this->chips[ret].floor = floor; | |
473 | this->chips[ret].chip = chip; | |
474 | this->chips[ret].curadr = 0; | |
475 | this->chips[ret].curmode = 0x50; | |
476 | ret++; | |
477 | } | |
478 | } | |
479 | ||
480 | /* Calculate and print the total size of the device */ | |
481 | this->totlen = this->numchips * (1 << this->chipshift); | |
482 | ||
483 | printk(KERN_INFO "%d flash chips found. Total DiskOnChip size: %ld MiB\n", | |
484 | this->numchips, this->totlen >> 20); | |
485 | } | |
486 | ||
487 | static int DoC2k_is_alias(struct DiskOnChip *doc1, struct DiskOnChip *doc2) | |
488 | { | |
489 | int tmp1, tmp2, retval; | |
490 | if (doc1->physadr == doc2->physadr) | |
491 | return 1; | |
492 | ||
493 | /* Use the alias resolution register which was set aside for this | |
494 | * purpose. If it's value is the same on both chips, they might | |
495 | * be the same chip, and we write to one and check for a change in | |
496 | * the other. It's unclear if this register is usuable in the | |
497 | * DoC 2000 (it's in the Millennium docs), but it seems to work. */ | |
498 | tmp1 = ReadDOC(doc1->virtadr, AliasResolution); | |
499 | tmp2 = ReadDOC(doc2->virtadr, AliasResolution); | |
500 | if (tmp1 != tmp2) | |
501 | return 0; | |
502 | ||
503 | WriteDOC((tmp1 + 1) % 0xff, doc1->virtadr, AliasResolution); | |
504 | tmp2 = ReadDOC(doc2->virtadr, AliasResolution); | |
505 | if (tmp2 == (tmp1 + 1) % 0xff) | |
506 | retval = 1; | |
507 | else | |
508 | retval = 0; | |
509 | ||
510 | /* Restore register contents. May not be necessary, but do it just to | |
511 | * be safe. */ | |
512 | WriteDOC(tmp1, doc1->virtadr, AliasResolution); | |
513 | ||
514 | return retval; | |
515 | } | |
516 | ||
5e535429 DW |
517 | /* This routine is found from the docprobe code by symbol_get(), |
518 | * which will bump the use count of this module. */ | |
519 | void DoC2k_init(struct mtd_info *mtd) | |
1da177e4 LT |
520 | { |
521 | struct DiskOnChip *this = mtd->priv; | |
522 | struct DiskOnChip *old = NULL; | |
523 | int maxchips; | |
524 | ||
525 | /* We must avoid being called twice for the same device. */ | |
526 | ||
527 | if (doc2klist) | |
528 | old = doc2klist->priv; | |
529 | ||
530 | while (old) { | |
531 | if (DoC2k_is_alias(old, this)) { | |
532 | printk(KERN_NOTICE | |
533 | "Ignoring DiskOnChip 2000 at 0x%lX - already configured\n", | |
534 | this->physadr); | |
535 | iounmap(this->virtadr); | |
536 | kfree(mtd); | |
537 | return; | |
538 | } | |
539 | if (old->nextdoc) | |
540 | old = old->nextdoc->priv; | |
541 | else | |
542 | old = NULL; | |
543 | } | |
544 | ||
545 | ||
546 | switch (this->ChipID) { | |
547 | case DOC_ChipID_Doc2kTSOP: | |
548 | mtd->name = "DiskOnChip 2000 TSOP"; | |
549 | this->ioreg = DoC_Mil_CDSN_IO; | |
550 | /* Pretend it's a Millennium */ | |
551 | this->ChipID = DOC_ChipID_DocMil; | |
552 | maxchips = MAX_CHIPS; | |
553 | break; | |
554 | case DOC_ChipID_Doc2k: | |
555 | mtd->name = "DiskOnChip 2000"; | |
556 | this->ioreg = DoC_2k_CDSN_IO; | |
557 | maxchips = MAX_CHIPS; | |
558 | break; | |
559 | case DOC_ChipID_DocMil: | |
560 | mtd->name = "DiskOnChip Millennium"; | |
561 | this->ioreg = DoC_Mil_CDSN_IO; | |
562 | maxchips = MAX_CHIPS_MIL; | |
563 | break; | |
564 | default: | |
565 | printk("Unknown ChipID 0x%02x\n", this->ChipID); | |
566 | kfree(mtd); | |
567 | iounmap(this->virtadr); | |
568 | return; | |
569 | } | |
570 | ||
571 | printk(KERN_NOTICE "%s found at address 0x%lX\n", mtd->name, | |
572 | this->physadr); | |
573 | ||
574 | mtd->type = MTD_NANDFLASH; | |
575 | mtd->flags = MTD_CAP_NANDFLASH; | |
576 | mtd->ecctype = MTD_ECC_RS_DiskOnChip; | |
577 | mtd->size = 0; | |
578 | mtd->erasesize = 0; | |
28318776 | 579 | mtd->writesize = 512; |
1da177e4 LT |
580 | mtd->oobsize = 16; |
581 | mtd->owner = THIS_MODULE; | |
582 | mtd->erase = doc_erase; | |
583 | mtd->point = NULL; | |
584 | mtd->unpoint = NULL; | |
585 | mtd->read = doc_read; | |
586 | mtd->write = doc_write; | |
1da177e4 LT |
587 | mtd->read_oob = doc_read_oob; |
588 | mtd->write_oob = doc_write_oob; | |
589 | mtd->sync = NULL; | |
590 | ||
591 | this->totlen = 0; | |
592 | this->numchips = 0; | |
593 | ||
594 | this->curfloor = -1; | |
595 | this->curchip = -1; | |
48b19268 | 596 | mutex_init(&this->lock); |
1da177e4 LT |
597 | |
598 | /* Ident all the chips present. */ | |
599 | DoC_ScanChips(this, maxchips); | |
600 | ||
601 | if (!this->totlen) { | |
602 | kfree(mtd); | |
603 | iounmap(this->virtadr); | |
604 | } else { | |
605 | this->nextdoc = doc2klist; | |
606 | doc2klist = mtd; | |
607 | mtd->size = this->totlen; | |
608 | mtd->erasesize = this->erasesize; | |
609 | add_mtd_device(mtd); | |
610 | return; | |
611 | } | |
612 | } | |
5e535429 | 613 | EXPORT_SYMBOL_GPL(DoC2k_init); |
1da177e4 LT |
614 | |
615 | static int doc_read(struct mtd_info *mtd, loff_t from, size_t len, | |
616 | size_t * retlen, u_char * buf) | |
617 | { | |
618 | /* Just a special case of doc_read_ecc */ | |
619 | return doc_read_ecc(mtd, from, len, retlen, buf, NULL, NULL); | |
620 | } | |
621 | ||
622 | static int doc_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, | |
623 | size_t * retlen, u_char * buf, u_char * eccbuf, struct nand_oobinfo *oobsel) | |
624 | { | |
625 | struct DiskOnChip *this = mtd->priv; | |
626 | void __iomem *docptr = this->virtadr; | |
627 | struct Nand *mychip; | |
628 | unsigned char syndrome[6]; | |
629 | volatile char dummy; | |
630 | int i, len256 = 0, ret=0; | |
631 | size_t left = len; | |
632 | ||
633 | /* Don't allow read past end of device */ | |
634 | if (from >= this->totlen) | |
635 | return -EINVAL; | |
636 | ||
48b19268 | 637 | mutex_lock(&this->lock); |
1da177e4 LT |
638 | |
639 | *retlen = 0; | |
640 | while (left) { | |
641 | len = left; | |
642 | ||
643 | /* Don't allow a single read to cross a 512-byte block boundary */ | |
644 | if (from + len > ((from | 0x1ff) + 1)) | |
645 | len = ((from | 0x1ff) + 1) - from; | |
646 | ||
647 | /* The ECC will not be calculated correctly if less than 512 is read */ | |
648 | if (len != 0x200 && eccbuf) | |
649 | printk(KERN_WARNING | |
650 | "ECC needs a full sector read (adr: %lx size %lx)\n", | |
651 | (long) from, (long) len); | |
652 | ||
653 | /* printk("DoC_Read (adr: %lx size %lx)\n", (long) from, (long) len); */ | |
654 | ||
655 | ||
656 | /* Find the chip which is to be used and select it */ | |
657 | mychip = &this->chips[from >> (this->chipshift)]; | |
658 | ||
659 | if (this->curfloor != mychip->floor) { | |
660 | DoC_SelectFloor(this, mychip->floor); | |
661 | DoC_SelectChip(this, mychip->chip); | |
662 | } else if (this->curchip != mychip->chip) { | |
663 | DoC_SelectChip(this, mychip->chip); | |
664 | } | |
665 | ||
666 | this->curfloor = mychip->floor; | |
667 | this->curchip = mychip->chip; | |
668 | ||
669 | DoC_Command(this, | |
670 | (!this->page256 | |
671 | && (from & 0x100)) ? NAND_CMD_READ1 : NAND_CMD_READ0, | |
672 | CDSN_CTRL_WP); | |
673 | DoC_Address(this, ADDR_COLUMN_PAGE, from, CDSN_CTRL_WP, | |
674 | CDSN_CTRL_ECC_IO); | |
675 | ||
676 | if (eccbuf) { | |
677 | /* Prime the ECC engine */ | |
678 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
679 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); | |
680 | } else { | |
681 | /* disable the ECC engine */ | |
682 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
683 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
684 | } | |
685 | ||
686 | /* treat crossing 256-byte sector for 2M x 8bits devices */ | |
687 | if (this->page256 && from + len > (from | 0xff) + 1) { | |
688 | len256 = (from | 0xff) + 1 - from; | |
689 | DoC_ReadBuf(this, buf, len256); | |
690 | ||
691 | DoC_Command(this, NAND_CMD_READ0, CDSN_CTRL_WP); | |
692 | DoC_Address(this, ADDR_COLUMN_PAGE, from + len256, | |
693 | CDSN_CTRL_WP, CDSN_CTRL_ECC_IO); | |
694 | } | |
695 | ||
696 | DoC_ReadBuf(this, &buf[len256], len - len256); | |
697 | ||
698 | /* Let the caller know we completed it */ | |
699 | *retlen += len; | |
700 | ||
701 | if (eccbuf) { | |
702 | /* Read the ECC data through the DiskOnChip ECC logic */ | |
703 | /* Note: this will work even with 2M x 8bit devices as */ | |
704 | /* they have 8 bytes of OOB per 256 page. mf. */ | |
705 | DoC_ReadBuf(this, eccbuf, 6); | |
706 | ||
707 | /* Flush the pipeline */ | |
708 | if (DoC_is_Millennium(this)) { | |
709 | dummy = ReadDOC(docptr, ECCConf); | |
710 | dummy = ReadDOC(docptr, ECCConf); | |
711 | i = ReadDOC(docptr, ECCConf); | |
712 | } else { | |
713 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
714 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
715 | i = ReadDOC(docptr, 2k_ECCStatus); | |
716 | } | |
717 | ||
718 | /* Check the ECC Status */ | |
719 | if (i & 0x80) { | |
720 | int nb_errors; | |
721 | /* There was an ECC error */ | |
722 | #ifdef ECC_DEBUG | |
723 | printk(KERN_ERR "DiskOnChip ECC Error: Read at %lx\n", (long)from); | |
724 | #endif | |
725 | /* Read the ECC syndrom through the DiskOnChip ECC logic. | |
726 | These syndrome will be all ZERO when there is no error */ | |
727 | for (i = 0; i < 6; i++) { | |
728 | syndrome[i] = | |
729 | ReadDOC(docptr, ECCSyndrome0 + i); | |
730 | } | |
731 | nb_errors = doc_decode_ecc(buf, syndrome); | |
732 | ||
733 | #ifdef ECC_DEBUG | |
734 | printk(KERN_ERR "Errors corrected: %x\n", nb_errors); | |
735 | #endif | |
736 | if (nb_errors < 0) { | |
737 | /* We return error, but have actually done the read. Not that | |
738 | this can be told to user-space, via sys_read(), but at least | |
739 | MTD-aware stuff can know about it by checking *retlen */ | |
740 | ret = -EIO; | |
741 | } | |
742 | } | |
743 | ||
744 | #ifdef PSYCHO_DEBUG | |
745 | printk(KERN_DEBUG "ECC DATA at %lxB: %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", | |
746 | (long)from, eccbuf[0], eccbuf[1], eccbuf[2], | |
747 | eccbuf[3], eccbuf[4], eccbuf[5]); | |
748 | #endif | |
e5580fbe | 749 | |
1da177e4 LT |
750 | /* disable the ECC engine */ |
751 | WriteDOC(DOC_ECC_DIS, docptr , ECCConf); | |
752 | } | |
753 | ||
e5580fbe | 754 | /* according to 11.4.1, we need to wait for the busy line |
1da177e4 LT |
755 | * drop if we read to the end of the page. */ |
756 | if(0 == ((from + len) & 0x1ff)) | |
757 | { | |
758 | DoC_WaitReady(this); | |
759 | } | |
760 | ||
761 | from += len; | |
762 | left -= len; | |
763 | buf += len; | |
764 | } | |
765 | ||
48b19268 | 766 | mutex_unlock(&this->lock); |
1da177e4 LT |
767 | |
768 | return ret; | |
769 | } | |
770 | ||
771 | static int doc_write(struct mtd_info *mtd, loff_t to, size_t len, | |
772 | size_t * retlen, const u_char * buf) | |
773 | { | |
774 | char eccbuf[6]; | |
775 | return doc_write_ecc(mtd, to, len, retlen, buf, eccbuf, NULL); | |
776 | } | |
777 | ||
778 | static int doc_write_ecc(struct mtd_info *mtd, loff_t to, size_t len, | |
779 | size_t * retlen, const u_char * buf, | |
780 | u_char * eccbuf, struct nand_oobinfo *oobsel) | |
781 | { | |
782 | struct DiskOnChip *this = mtd->priv; | |
783 | int di; /* Yes, DI is a hangover from when I was disassembling the binary driver */ | |
784 | void __iomem *docptr = this->virtadr; | |
785 | volatile char dummy; | |
786 | int len256 = 0; | |
787 | struct Nand *mychip; | |
788 | size_t left = len; | |
789 | int status; | |
790 | ||
791 | /* Don't allow write past end of device */ | |
792 | if (to >= this->totlen) | |
793 | return -EINVAL; | |
794 | ||
48b19268 | 795 | mutex_lock(&this->lock); |
1da177e4 LT |
796 | |
797 | *retlen = 0; | |
798 | while (left) { | |
799 | len = left; | |
800 | ||
801 | /* Don't allow a single write to cross a 512-byte block boundary */ | |
802 | if (to + len > ((to | 0x1ff) + 1)) | |
803 | len = ((to | 0x1ff) + 1) - to; | |
804 | ||
805 | /* The ECC will not be calculated correctly if less than 512 is written */ | |
806 | /* DBB- | |
807 | if (len != 0x200 && eccbuf) | |
808 | printk(KERN_WARNING | |
809 | "ECC needs a full sector write (adr: %lx size %lx)\n", | |
810 | (long) to, (long) len); | |
811 | -DBB */ | |
812 | ||
813 | /* printk("DoC_Write (adr: %lx size %lx)\n", (long) to, (long) len); */ | |
814 | ||
815 | /* Find the chip which is to be used and select it */ | |
816 | mychip = &this->chips[to >> (this->chipshift)]; | |
817 | ||
818 | if (this->curfloor != mychip->floor) { | |
819 | DoC_SelectFloor(this, mychip->floor); | |
820 | DoC_SelectChip(this, mychip->chip); | |
821 | } else if (this->curchip != mychip->chip) { | |
822 | DoC_SelectChip(this, mychip->chip); | |
823 | } | |
824 | ||
825 | this->curfloor = mychip->floor; | |
826 | this->curchip = mychip->chip; | |
827 | ||
828 | /* Set device to main plane of flash */ | |
829 | DoC_Command(this, NAND_CMD_RESET, CDSN_CTRL_WP); | |
830 | DoC_Command(this, | |
831 | (!this->page256 | |
832 | && (to & 0x100)) ? NAND_CMD_READ1 : NAND_CMD_READ0, | |
833 | CDSN_CTRL_WP); | |
834 | ||
835 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
836 | DoC_Address(this, ADDR_COLUMN_PAGE, to, 0, CDSN_CTRL_ECC_IO); | |
837 | ||
838 | if (eccbuf) { | |
839 | /* Prime the ECC engine */ | |
840 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
841 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); | |
842 | } else { | |
843 | /* disable the ECC engine */ | |
844 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
845 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
846 | } | |
847 | ||
848 | /* treat crossing 256-byte sector for 2M x 8bits devices */ | |
849 | if (this->page256 && to + len > (to | 0xff) + 1) { | |
850 | len256 = (to | 0xff) + 1 - to; | |
851 | DoC_WriteBuf(this, buf, len256); | |
852 | ||
853 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
854 | ||
855 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
856 | /* There's an implicit DoC_WaitReady() in DoC_Command */ | |
857 | ||
858 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
859 | DoC_Delay(this, 2); | |
860 | ||
861 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
862 | printk(KERN_ERR "Error programming flash\n"); | |
863 | /* Error in programming */ | |
864 | *retlen = 0; | |
48b19268 | 865 | mutex_unlock(&this->lock); |
1da177e4 LT |
866 | return -EIO; |
867 | } | |
868 | ||
869 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
870 | DoC_Address(this, ADDR_COLUMN_PAGE, to + len256, 0, | |
871 | CDSN_CTRL_ECC_IO); | |
872 | } | |
873 | ||
874 | DoC_WriteBuf(this, &buf[len256], len - len256); | |
875 | ||
876 | if (eccbuf) { | |
877 | WriteDOC(CDSN_CTRL_ECC_IO | CDSN_CTRL_CE, docptr, | |
878 | CDSNControl); | |
879 | ||
880 | if (DoC_is_Millennium(this)) { | |
881 | WriteDOC(0, docptr, NOP); | |
882 | WriteDOC(0, docptr, NOP); | |
883 | WriteDOC(0, docptr, NOP); | |
884 | } else { | |
885 | WriteDOC_(0, docptr, this->ioreg); | |
886 | WriteDOC_(0, docptr, this->ioreg); | |
887 | WriteDOC_(0, docptr, this->ioreg); | |
888 | } | |
889 | ||
890 | WriteDOC(CDSN_CTRL_ECC_IO | CDSN_CTRL_FLASH_IO | CDSN_CTRL_CE, docptr, | |
891 | CDSNControl); | |
892 | ||
893 | /* Read the ECC data through the DiskOnChip ECC logic */ | |
894 | for (di = 0; di < 6; di++) { | |
895 | eccbuf[di] = ReadDOC(docptr, ECCSyndrome0 + di); | |
896 | } | |
897 | ||
898 | /* Reset the ECC engine */ | |
899 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
900 | ||
901 | #ifdef PSYCHO_DEBUG | |
902 | printk | |
903 | ("OOB data at %lx is %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", | |
904 | (long) to, eccbuf[0], eccbuf[1], eccbuf[2], eccbuf[3], | |
905 | eccbuf[4], eccbuf[5]); | |
906 | #endif | |
907 | } | |
908 | ||
909 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
910 | ||
911 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
912 | /* There's an implicit DoC_WaitReady() in DoC_Command */ | |
913 | ||
914 | if (DoC_is_Millennium(this)) { | |
915 | ReadDOC(docptr, ReadPipeInit); | |
916 | status = ReadDOC(docptr, LastDataRead); | |
917 | } else { | |
918 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
919 | DoC_Delay(this, 2); | |
920 | status = ReadDOC_(docptr, this->ioreg); | |
921 | } | |
922 | ||
923 | if (status & 1) { | |
924 | printk(KERN_ERR "Error programming flash\n"); | |
925 | /* Error in programming */ | |
926 | *retlen = 0; | |
48b19268 | 927 | mutex_unlock(&this->lock); |
1da177e4 LT |
928 | return -EIO; |
929 | } | |
930 | ||
931 | /* Let the caller know we completed it */ | |
932 | *retlen += len; | |
e5580fbe | 933 | |
1da177e4 LT |
934 | if (eccbuf) { |
935 | unsigned char x[8]; | |
936 | size_t dummy; | |
937 | int ret; | |
938 | ||
939 | /* Write the ECC data to flash */ | |
940 | for (di=0; di<6; di++) | |
941 | x[di] = eccbuf[di]; | |
e5580fbe | 942 | |
1da177e4 LT |
943 | x[6]=0x55; |
944 | x[7]=0x55; | |
e5580fbe | 945 | |
1da177e4 LT |
946 | ret = doc_write_oob_nolock(mtd, to, 8, &dummy, x); |
947 | if (ret) { | |
48b19268 | 948 | mutex_unlock(&this->lock); |
1da177e4 LT |
949 | return ret; |
950 | } | |
951 | } | |
952 | ||
953 | to += len; | |
954 | left -= len; | |
955 | buf += len; | |
956 | } | |
957 | ||
48b19268 | 958 | mutex_unlock(&this->lock); |
1da177e4 LT |
959 | return 0; |
960 | } | |
961 | ||
8593fbc6 TG |
962 | static int doc_read_oob(struct mtd_info *mtd, loff_t ofs, |
963 | struct mtd_oob_ops *ops) | |
1da177e4 LT |
964 | { |
965 | struct DiskOnChip *this = mtd->priv; | |
966 | int len256 = 0, ret; | |
967 | struct Nand *mychip; | |
8593fbc6 TG |
968 | uint8_t *buf = ops->oobbuf; |
969 | size_t len = ops->len; | |
970 | ||
971 | BUG_ON(ops->mode != MTD_OOB_PLACE); | |
972 | ||
973 | ofs += ops->ooboffs; | |
1da177e4 | 974 | |
48b19268 | 975 | mutex_lock(&this->lock); |
1da177e4 LT |
976 | |
977 | mychip = &this->chips[ofs >> this->chipshift]; | |
978 | ||
979 | if (this->curfloor != mychip->floor) { | |
980 | DoC_SelectFloor(this, mychip->floor); | |
981 | DoC_SelectChip(this, mychip->chip); | |
982 | } else if (this->curchip != mychip->chip) { | |
983 | DoC_SelectChip(this, mychip->chip); | |
984 | } | |
985 | this->curfloor = mychip->floor; | |
986 | this->curchip = mychip->chip; | |
987 | ||
988 | /* update address for 2M x 8bit devices. OOB starts on the second */ | |
989 | /* page to maintain compatibility with doc_read_ecc. */ | |
990 | if (this->page256) { | |
991 | if (!(ofs & 0x8)) | |
992 | ofs += 0x100; | |
993 | else | |
994 | ofs -= 0x8; | |
995 | } | |
996 | ||
997 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
998 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs, CDSN_CTRL_WP, 0); | |
999 | ||
1000 | /* treat crossing 8-byte OOB data for 2M x 8bit devices */ | |
1001 | /* Note: datasheet says it should automaticaly wrap to the */ | |
1002 | /* next OOB block, but it didn't work here. mf. */ | |
1003 | if (this->page256 && ofs + len > (ofs | 0x7) + 1) { | |
1004 | len256 = (ofs | 0x7) + 1 - ofs; | |
1005 | DoC_ReadBuf(this, buf, len256); | |
1006 | ||
1007 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
1008 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs & (~0x1ff), | |
1009 | CDSN_CTRL_WP, 0); | |
1010 | } | |
1011 | ||
1012 | DoC_ReadBuf(this, &buf[len256], len - len256); | |
1013 | ||
8593fbc6 | 1014 | ops->retlen = len; |
1da177e4 LT |
1015 | /* Reading the full OOB data drops us off of the end of the page, |
1016 | * causing the flash device to go into busy mode, so we need | |
1017 | * to wait until ready 11.4.1 and Toshiba TC58256FT docs */ | |
e5580fbe | 1018 | |
1da177e4 LT |
1019 | ret = DoC_WaitReady(this); |
1020 | ||
48b19268 | 1021 | mutex_unlock(&this->lock); |
1da177e4 LT |
1022 | return ret; |
1023 | ||
1024 | } | |
1025 | ||
1026 | static int doc_write_oob_nolock(struct mtd_info *mtd, loff_t ofs, size_t len, | |
1027 | size_t * retlen, const u_char * buf) | |
1028 | { | |
1029 | struct DiskOnChip *this = mtd->priv; | |
1030 | int len256 = 0; | |
1031 | void __iomem *docptr = this->virtadr; | |
1032 | struct Nand *mychip = &this->chips[ofs >> this->chipshift]; | |
1033 | volatile int dummy; | |
1034 | int status; | |
1035 | ||
1036 | // 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, | |
1037 | // buf[0], buf[1], buf[2], buf[3], buf[8], buf[9], buf[14],buf[15]); | |
1038 | ||
1039 | /* Find the chip which is to be used and select it */ | |
1040 | if (this->curfloor != mychip->floor) { | |
1041 | DoC_SelectFloor(this, mychip->floor); | |
1042 | DoC_SelectChip(this, mychip->chip); | |
1043 | } else if (this->curchip != mychip->chip) { | |
1044 | DoC_SelectChip(this, mychip->chip); | |
1045 | } | |
1046 | this->curfloor = mychip->floor; | |
1047 | this->curchip = mychip->chip; | |
1048 | ||
1049 | /* disable the ECC engine */ | |
1050 | WriteDOC (DOC_ECC_RESET, docptr, ECCConf); | |
1051 | WriteDOC (DOC_ECC_DIS, docptr, ECCConf); | |
1052 | ||
1053 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
1054 | DoC_Command(this, NAND_CMD_RESET, CDSN_CTRL_WP); | |
1055 | ||
1056 | /* issue the Read2 command to set the pointer to the Spare Data Area. */ | |
1057 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
1058 | ||
1059 | /* update address for 2M x 8bit devices. OOB starts on the second */ | |
1060 | /* page to maintain compatibility with doc_read_ecc. */ | |
1061 | if (this->page256) { | |
1062 | if (!(ofs & 0x8)) | |
1063 | ofs += 0x100; | |
1064 | else | |
1065 | ofs -= 0x8; | |
1066 | } | |
1067 | ||
1068 | /* issue the Serial Data In command to initial the Page Program process */ | |
1069 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1070 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs, 0, 0); | |
1071 | ||
1072 | /* treat crossing 8-byte OOB data for 2M x 8bit devices */ | |
1073 | /* Note: datasheet says it should automaticaly wrap to the */ | |
1074 | /* next OOB block, but it didn't work here. mf. */ | |
1075 | if (this->page256 && ofs + len > (ofs | 0x7) + 1) { | |
1076 | len256 = (ofs | 0x7) + 1 - ofs; | |
1077 | DoC_WriteBuf(this, buf, len256); | |
1078 | ||
1079 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1080 | DoC_Command(this, NAND_CMD_STATUS, 0); | |
1081 | /* DoC_WaitReady() is implicit in DoC_Command */ | |
1082 | ||
1083 | if (DoC_is_Millennium(this)) { | |
1084 | ReadDOC(docptr, ReadPipeInit); | |
1085 | status = ReadDOC(docptr, LastDataRead); | |
1086 | } else { | |
1087 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1088 | DoC_Delay(this, 2); | |
1089 | status = ReadDOC_(docptr, this->ioreg); | |
1090 | } | |
1091 | ||
1092 | if (status & 1) { | |
1093 | printk(KERN_ERR "Error programming oob data\n"); | |
1094 | /* There was an error */ | |
1095 | *retlen = 0; | |
1096 | return -EIO; | |
1097 | } | |
1098 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1099 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs & (~0x1ff), 0, 0); | |
1100 | } | |
1101 | ||
1102 | DoC_WriteBuf(this, &buf[len256], len - len256); | |
1103 | ||
1104 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1105 | DoC_Command(this, NAND_CMD_STATUS, 0); | |
1106 | /* DoC_WaitReady() is implicit in DoC_Command */ | |
1107 | ||
1108 | if (DoC_is_Millennium(this)) { | |
1109 | ReadDOC(docptr, ReadPipeInit); | |
1110 | status = ReadDOC(docptr, LastDataRead); | |
1111 | } else { | |
1112 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1113 | DoC_Delay(this, 2); | |
1114 | status = ReadDOC_(docptr, this->ioreg); | |
1115 | } | |
1116 | ||
1117 | if (status & 1) { | |
1118 | printk(KERN_ERR "Error programming oob data\n"); | |
1119 | /* There was an error */ | |
1120 | *retlen = 0; | |
1121 | return -EIO; | |
1122 | } | |
1123 | ||
1124 | *retlen = len; | |
1125 | return 0; | |
1126 | ||
1127 | } | |
e5580fbe | 1128 | |
8593fbc6 TG |
1129 | static int doc_write_oob(struct mtd_info *mtd, loff_t ofs, |
1130 | struct mtd_oob_ops *ops) | |
1da177e4 | 1131 | { |
8593fbc6 TG |
1132 | struct DiskOnChip *this = mtd->priv; |
1133 | int ret; | |
1da177e4 | 1134 | |
8593fbc6 | 1135 | BUG_ON(ops->mode != MTD_OOB_PLACE); |
1da177e4 | 1136 | |
8593fbc6 TG |
1137 | mutex_lock(&this->lock); |
1138 | ret = doc_write_oob_nolock(mtd, ofs + ops->ooboffs, ops->len, | |
1139 | &ops->retlen, ops->oobbuf); | |
1140 | ||
1141 | mutex_unlock(&this->lock); | |
1142 | return ret; | |
1da177e4 LT |
1143 | } |
1144 | ||
1145 | static int doc_erase(struct mtd_info *mtd, struct erase_info *instr) | |
1146 | { | |
1147 | struct DiskOnChip *this = mtd->priv; | |
1148 | __u32 ofs = instr->addr; | |
1149 | __u32 len = instr->len; | |
1150 | volatile int dummy; | |
1151 | void __iomem *docptr = this->virtadr; | |
1152 | struct Nand *mychip; | |
1153 | int status; | |
1154 | ||
48b19268 | 1155 | mutex_lock(&this->lock); |
1da177e4 LT |
1156 | |
1157 | if (ofs & (mtd->erasesize-1) || len & (mtd->erasesize-1)) { | |
48b19268 | 1158 | mutex_unlock(&this->lock); |
1da177e4 LT |
1159 | return -EINVAL; |
1160 | } | |
1161 | ||
1162 | instr->state = MTD_ERASING; | |
e5580fbe | 1163 | |
1da177e4 LT |
1164 | /* FIXME: Do this in the background. Use timers or schedule_task() */ |
1165 | while(len) { | |
1166 | mychip = &this->chips[ofs >> this->chipshift]; | |
1167 | ||
1168 | if (this->curfloor != mychip->floor) { | |
1169 | DoC_SelectFloor(this, mychip->floor); | |
1170 | DoC_SelectChip(this, mychip->chip); | |
1171 | } else if (this->curchip != mychip->chip) { | |
1172 | DoC_SelectChip(this, mychip->chip); | |
1173 | } | |
1174 | this->curfloor = mychip->floor; | |
1175 | this->curchip = mychip->chip; | |
1176 | ||
1177 | DoC_Command(this, NAND_CMD_ERASE1, 0); | |
1178 | DoC_Address(this, ADDR_PAGE, ofs, 0, 0); | |
1179 | DoC_Command(this, NAND_CMD_ERASE2, 0); | |
1180 | ||
1181 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
1182 | ||
1183 | if (DoC_is_Millennium(this)) { | |
1184 | ReadDOC(docptr, ReadPipeInit); | |
1185 | status = ReadDOC(docptr, LastDataRead); | |
1186 | } else { | |
1187 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1188 | DoC_Delay(this, 2); | |
1189 | status = ReadDOC_(docptr, this->ioreg); | |
1190 | } | |
1191 | ||
1192 | if (status & 1) { | |
1193 | printk(KERN_ERR "Error erasing at 0x%x\n", ofs); | |
1194 | /* There was an error */ | |
1195 | instr->state = MTD_ERASE_FAILED; | |
1196 | goto callback; | |
1197 | } | |
1198 | ofs += mtd->erasesize; | |
1199 | len -= mtd->erasesize; | |
1200 | } | |
1201 | instr->state = MTD_ERASE_DONE; | |
1202 | ||
1203 | callback: | |
1204 | mtd_erase_callback(instr); | |
1205 | ||
48b19268 | 1206 | mutex_unlock(&this->lock); |
1da177e4 LT |
1207 | return 0; |
1208 | } | |
1209 | ||
1210 | ||
1211 | /**************************************************************************** | |
1212 | * | |
1213 | * Module stuff | |
1214 | * | |
1215 | ****************************************************************************/ | |
1216 | ||
1da177e4 LT |
1217 | static void __exit cleanup_doc2000(void) |
1218 | { | |
1219 | struct mtd_info *mtd; | |
1220 | struct DiskOnChip *this; | |
1221 | ||
1222 | while ((mtd = doc2klist)) { | |
1223 | this = mtd->priv; | |
1224 | doc2klist = this->nextdoc; | |
1225 | ||
1226 | del_mtd_device(mtd); | |
1227 | ||
1228 | iounmap(this->virtadr); | |
1229 | kfree(this->chips); | |
1230 | kfree(mtd); | |
1231 | } | |
1da177e4 LT |
1232 | } |
1233 | ||
1234 | module_exit(cleanup_doc2000); | |
1da177e4 LT |
1235 | |
1236 | MODULE_LICENSE("GPL"); | |
1237 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org> et al."); | |
1238 | MODULE_DESCRIPTION("MTD driver for DiskOnChip 2000 and Millennium"); | |
1239 |