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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> | |
1da177e4 LT |
6 | */ |
7 | ||
8 | #include <linux/kernel.h> | |
9 | #include <linux/module.h> | |
10 | #include <asm/errno.h> | |
11 | #include <asm/io.h> | |
12 | #include <asm/uaccess.h> | |
1da177e4 LT |
13 | #include <linux/delay.h> |
14 | #include <linux/slab.h> | |
15 | #include <linux/sched.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/types.h> | |
18 | #include <linux/bitops.h> | |
040d79f9 | 19 | #include <linux/mutex.h> |
1da177e4 LT |
20 | |
21 | #include <linux/mtd/mtd.h> | |
22 | #include <linux/mtd/nand.h> | |
23 | #include <linux/mtd/doc2000.h> | |
24 | ||
25 | #define DOC_SUPPORT_2000 | |
26 | #define DOC_SUPPORT_2000TSOP | |
27 | #define DOC_SUPPORT_MILLENNIUM | |
28 | ||
29 | #ifdef DOC_SUPPORT_2000 | |
30 | #define DoC_is_2000(doc) (doc->ChipID == DOC_ChipID_Doc2k) | |
31 | #else | |
32 | #define DoC_is_2000(doc) (0) | |
33 | #endif | |
34 | ||
35 | #if defined(DOC_SUPPORT_2000TSOP) || defined(DOC_SUPPORT_MILLENNIUM) | |
36 | #define DoC_is_Millennium(doc) (doc->ChipID == DOC_ChipID_DocMil) | |
37 | #else | |
38 | #define DoC_is_Millennium(doc) (0) | |
39 | #endif | |
40 | ||
41 | /* #define ECC_DEBUG */ | |
42 | ||
43 | /* I have no idea why some DoC chips can not use memcpy_from|to_io(). | |
44 | * This may be due to the different revisions of the ASIC controller built-in or | |
45 | * simplily a QA/Bug issue. Who knows ?? If you have trouble, please uncomment | |
46 | * this: | |
47 | #undef USE_MEMCPY | |
48 | */ | |
49 | ||
50 | static int doc_read(struct mtd_info *mtd, loff_t from, size_t len, | |
51 | size_t *retlen, u_char *buf); | |
52 | static int doc_write(struct mtd_info *mtd, loff_t to, size_t len, | |
53 | size_t *retlen, const u_char *buf); | |
8593fbc6 TG |
54 | static int doc_read_oob(struct mtd_info *mtd, loff_t ofs, |
55 | struct mtd_oob_ops *ops); | |
56 | static int doc_write_oob(struct mtd_info *mtd, loff_t ofs, | |
57 | struct mtd_oob_ops *ops); | |
1da177e4 LT |
58 | static int doc_write_oob_nolock(struct mtd_info *mtd, loff_t ofs, size_t len, |
59 | size_t *retlen, const u_char *buf); | |
60 | static int doc_erase (struct mtd_info *mtd, struct erase_info *instr); | |
61 | ||
62 | static struct mtd_info *doc2klist = NULL; | |
63 | ||
64 | /* Perform the required delay cycles by reading from the appropriate register */ | |
65 | static void DoC_Delay(struct DiskOnChip *doc, unsigned short cycles) | |
66 | { | |
67 | volatile char dummy; | |
68 | int i; | |
e5580fbe | 69 | |
1da177e4 LT |
70 | for (i = 0; i < cycles; i++) { |
71 | if (DoC_is_Millennium(doc)) | |
72 | dummy = ReadDOC(doc->virtadr, NOP); | |
73 | else | |
74 | dummy = ReadDOC(doc->virtadr, DOCStatus); | |
75 | } | |
e5580fbe | 76 | |
1da177e4 LT |
77 | } |
78 | ||
79 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
80 | static int _DoC_WaitReady(struct DiskOnChip *doc) | |
81 | { | |
82 | void __iomem *docptr = doc->virtadr; | |
83 | unsigned long timeo = jiffies + (HZ * 10); | |
84 | ||
85 | DEBUG(MTD_DEBUG_LEVEL3, | |
86 | "_DoC_WaitReady called for out-of-line wait\n"); | |
87 | ||
88 | /* Out-of-line routine to wait for chip response */ | |
89 | while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
90 | /* issue 2 read from NOP register after reading from CDSNControl register | |
91 | see Software Requirement 11.4 item 2. */ | |
92 | DoC_Delay(doc, 2); | |
93 | ||
94 | if (time_after(jiffies, timeo)) { | |
95 | DEBUG(MTD_DEBUG_LEVEL2, "_DoC_WaitReady timed out.\n"); | |
96 | return -EIO; | |
97 | } | |
98 | udelay(1); | |
99 | cond_resched(); | |
100 | } | |
101 | ||
102 | return 0; | |
103 | } | |
104 | ||
105 | static inline int DoC_WaitReady(struct DiskOnChip *doc) | |
106 | { | |
107 | void __iomem *docptr = doc->virtadr; | |
108 | ||
109 | /* This is inline, to optimise the common case, where it's ready instantly */ | |
110 | int ret = 0; | |
111 | ||
112 | /* 4 read form NOP register should be issued in prior to the read from CDSNControl | |
113 | see Software Requirement 11.4 item 2. */ | |
114 | DoC_Delay(doc, 4); | |
115 | ||
116 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) | |
117 | /* Call the out-of-line routine to wait */ | |
118 | ret = _DoC_WaitReady(doc); | |
119 | ||
120 | /* issue 2 read from NOP register after reading from CDSNControl register | |
121 | see Software Requirement 11.4 item 2. */ | |
122 | DoC_Delay(doc, 2); | |
123 | ||
124 | return ret; | |
125 | } | |
126 | ||
127 | /* DoC_Command: Send a flash command to the flash chip through the CDSN Slow IO register to | |
128 | bypass the internal pipeline. Each of 4 delay cycles (read from the NOP register) is | |
129 | required after writing to CDSN Control register, see Software Requirement 11.4 item 3. */ | |
130 | ||
858119e1 | 131 | static int DoC_Command(struct DiskOnChip *doc, unsigned char command, |
1da177e4 LT |
132 | unsigned char xtraflags) |
133 | { | |
134 | void __iomem *docptr = doc->virtadr; | |
135 | ||
136 | if (DoC_is_2000(doc)) | |
137 | xtraflags |= CDSN_CTRL_FLASH_IO; | |
138 | ||
139 | /* Assert the CLE (Command Latch Enable) line to the flash chip */ | |
140 | WriteDOC(xtraflags | CDSN_CTRL_CLE | CDSN_CTRL_CE, docptr, CDSNControl); | |
141 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
142 | ||
143 | if (DoC_is_Millennium(doc)) | |
144 | WriteDOC(command, docptr, CDSNSlowIO); | |
145 | ||
146 | /* Send the command */ | |
147 | WriteDOC_(command, docptr, doc->ioreg); | |
148 | if (DoC_is_Millennium(doc)) | |
149 | WriteDOC(command, docptr, WritePipeTerm); | |
150 | ||
151 | /* Lower the CLE line */ | |
152 | WriteDOC(xtraflags | CDSN_CTRL_CE, docptr, CDSNControl); | |
153 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
154 | ||
155 | /* Wait for the chip to respond - Software requirement 11.4.1 (extended for any command) */ | |
156 | return DoC_WaitReady(doc); | |
157 | } | |
158 | ||
159 | /* DoC_Address: Set the current address for the flash chip through the CDSN Slow IO register to | |
160 | bypass the internal pipeline. Each of 4 delay cycles (read from the NOP register) is | |
161 | required after writing to CDSN Control register, see Software Requirement 11.4 item 3. */ | |
162 | ||
163 | static int DoC_Address(struct DiskOnChip *doc, int numbytes, unsigned long ofs, | |
164 | unsigned char xtraflags1, unsigned char xtraflags2) | |
165 | { | |
166 | int i; | |
167 | void __iomem *docptr = doc->virtadr; | |
168 | ||
169 | if (DoC_is_2000(doc)) | |
170 | xtraflags1 |= CDSN_CTRL_FLASH_IO; | |
171 | ||
172 | /* Assert the ALE (Address Latch Enable) line to the flash chip */ | |
173 | WriteDOC(xtraflags1 | CDSN_CTRL_ALE | CDSN_CTRL_CE, docptr, CDSNControl); | |
174 | ||
175 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
176 | ||
177 | /* Send the address */ | |
178 | /* Devices with 256-byte page are addressed as: | |
179 | Column (bits 0-7), Page (bits 8-15, 16-23, 24-31) | |
180 | * there is no device on the market with page256 | |
181 | and more than 24 bits. | |
182 | Devices with 512-byte page are addressed as: | |
183 | Column (bits 0-7), Page (bits 9-16, 17-24, 25-31) | |
184 | * 25-31 is sent only if the chip support it. | |
185 | * bit 8 changes the read command to be sent | |
186 | (NAND_CMD_READ0 or NAND_CMD_READ1). | |
187 | */ | |
188 | ||
189 | if (numbytes == ADDR_COLUMN || numbytes == ADDR_COLUMN_PAGE) { | |
190 | if (DoC_is_Millennium(doc)) | |
191 | WriteDOC(ofs & 0xff, docptr, CDSNSlowIO); | |
192 | WriteDOC_(ofs & 0xff, docptr, doc->ioreg); | |
193 | } | |
194 | ||
195 | if (doc->page256) { | |
196 | ofs = ofs >> 8; | |
197 | } else { | |
198 | ofs = ofs >> 9; | |
199 | } | |
200 | ||
201 | if (numbytes == ADDR_PAGE || numbytes == ADDR_COLUMN_PAGE) { | |
202 | for (i = 0; i < doc->pageadrlen; i++, ofs = ofs >> 8) { | |
203 | if (DoC_is_Millennium(doc)) | |
204 | WriteDOC(ofs & 0xff, docptr, CDSNSlowIO); | |
205 | WriteDOC_(ofs & 0xff, docptr, doc->ioreg); | |
206 | } | |
207 | } | |
208 | ||
209 | if (DoC_is_Millennium(doc)) | |
210 | WriteDOC(ofs & 0xff, docptr, WritePipeTerm); | |
211 | ||
212 | DoC_Delay(doc, 2); /* Needed for some slow flash chips. mf. */ | |
e5580fbe TG |
213 | |
214 | /* FIXME: The SlowIO's for millennium could be replaced by | |
1da177e4 LT |
215 | a single WritePipeTerm here. mf. */ |
216 | ||
217 | /* Lower the ALE line */ | |
218 | WriteDOC(xtraflags1 | xtraflags2 | CDSN_CTRL_CE, docptr, | |
219 | CDSNControl); | |
220 | ||
221 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
222 | ||
223 | /* Wait for the chip to respond - Software requirement 11.4.1 */ | |
224 | return DoC_WaitReady(doc); | |
225 | } | |
226 | ||
227 | /* Read a buffer from DoC, taking care of Millennium odditys */ | |
228 | static void DoC_ReadBuf(struct DiskOnChip *doc, u_char * buf, int len) | |
229 | { | |
230 | volatile int dummy; | |
231 | int modulus = 0xffff; | |
232 | void __iomem *docptr = doc->virtadr; | |
233 | int i; | |
234 | ||
235 | if (len <= 0) | |
236 | return; | |
237 | ||
238 | if (DoC_is_Millennium(doc)) { | |
239 | /* Read the data via the internal pipeline through CDSN IO register, | |
240 | see Pipelined Read Operations 11.3 */ | |
241 | dummy = ReadDOC(docptr, ReadPipeInit); | |
242 | ||
243 | /* Millennium should use the LastDataRead register - Pipeline Reads */ | |
244 | len--; | |
245 | ||
246 | /* This is needed for correctly ECC calculation */ | |
247 | modulus = 0xff; | |
248 | } | |
249 | ||
250 | for (i = 0; i < len; i++) | |
251 | buf[i] = ReadDOC_(docptr, doc->ioreg + (i & modulus)); | |
252 | ||
253 | if (DoC_is_Millennium(doc)) { | |
254 | buf[i] = ReadDOC(docptr, LastDataRead); | |
255 | } | |
256 | } | |
257 | ||
258 | /* Write a buffer to DoC, taking care of Millennium odditys */ | |
259 | static void DoC_WriteBuf(struct DiskOnChip *doc, const u_char * buf, int len) | |
260 | { | |
261 | void __iomem *docptr = doc->virtadr; | |
262 | int i; | |
263 | ||
264 | if (len <= 0) | |
265 | return; | |
266 | ||
267 | for (i = 0; i < len; i++) | |
268 | WriteDOC_(buf[i], docptr, doc->ioreg + i); | |
269 | ||
270 | if (DoC_is_Millennium(doc)) { | |
271 | WriteDOC(0x00, docptr, WritePipeTerm); | |
272 | } | |
273 | } | |
274 | ||
275 | ||
276 | /* DoC_SelectChip: Select a given flash chip within the current floor */ | |
277 | ||
278 | static inline int DoC_SelectChip(struct DiskOnChip *doc, int chip) | |
279 | { | |
280 | void __iomem *docptr = doc->virtadr; | |
281 | ||
282 | /* Software requirement 11.4.4 before writing DeviceSelect */ | |
283 | /* Deassert the CE line to eliminate glitches on the FCE# outputs */ | |
284 | WriteDOC(CDSN_CTRL_WP, docptr, CDSNControl); | |
285 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
286 | ||
287 | /* Select the individual flash chip requested */ | |
288 | WriteDOC(chip, docptr, CDSNDeviceSelect); | |
289 | DoC_Delay(doc, 4); | |
290 | ||
291 | /* Reassert the CE line */ | |
292 | WriteDOC(CDSN_CTRL_CE | CDSN_CTRL_FLASH_IO | CDSN_CTRL_WP, docptr, | |
293 | CDSNControl); | |
294 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
295 | ||
296 | /* Wait for it to be ready */ | |
297 | return DoC_WaitReady(doc); | |
298 | } | |
299 | ||
300 | /* DoC_SelectFloor: Select a given floor (bank of flash chips) */ | |
301 | ||
302 | static inline int DoC_SelectFloor(struct DiskOnChip *doc, int floor) | |
303 | { | |
304 | void __iomem *docptr = doc->virtadr; | |
305 | ||
306 | /* Select the floor (bank) of chips required */ | |
307 | WriteDOC(floor, docptr, FloorSelect); | |
308 | ||
309 | /* Wait for the chip to be ready */ | |
310 | return DoC_WaitReady(doc); | |
311 | } | |
312 | ||
313 | /* DoC_IdentChip: Identify a given NAND chip given {floor,chip} */ | |
314 | ||
315 | static int DoC_IdentChip(struct DiskOnChip *doc, int floor, int chip) | |
316 | { | |
317 | int mfr, id, i, j; | |
318 | volatile char dummy; | |
319 | ||
320 | /* Page in the required floor/chip */ | |
321 | DoC_SelectFloor(doc, floor); | |
322 | DoC_SelectChip(doc, chip); | |
323 | ||
324 | /* Reset the chip */ | |
325 | if (DoC_Command(doc, NAND_CMD_RESET, CDSN_CTRL_WP)) { | |
326 | DEBUG(MTD_DEBUG_LEVEL2, | |
327 | "DoC_Command (reset) for %d,%d returned true\n", | |
328 | floor, chip); | |
329 | return 0; | |
330 | } | |
331 | ||
332 | ||
333 | /* Read the NAND chip ID: 1. Send ReadID command */ | |
334 | if (DoC_Command(doc, NAND_CMD_READID, CDSN_CTRL_WP)) { | |
335 | DEBUG(MTD_DEBUG_LEVEL2, | |
336 | "DoC_Command (ReadID) for %d,%d returned true\n", | |
337 | floor, chip); | |
338 | return 0; | |
339 | } | |
340 | ||
341 | /* Read the NAND chip ID: 2. Send address byte zero */ | |
342 | DoC_Address(doc, ADDR_COLUMN, 0, CDSN_CTRL_WP, 0); | |
343 | ||
344 | /* Read the manufacturer and device id codes from the device */ | |
345 | ||
346 | if (DoC_is_Millennium(doc)) { | |
347 | DoC_Delay(doc, 2); | |
348 | dummy = ReadDOC(doc->virtadr, ReadPipeInit); | |
349 | mfr = ReadDOC(doc->virtadr, LastDataRead); | |
350 | ||
351 | DoC_Delay(doc, 2); | |
352 | dummy = ReadDOC(doc->virtadr, ReadPipeInit); | |
353 | id = ReadDOC(doc->virtadr, LastDataRead); | |
354 | } else { | |
355 | /* CDSN Slow IO register see Software Req 11.4 item 5. */ | |
356 | dummy = ReadDOC(doc->virtadr, CDSNSlowIO); | |
357 | DoC_Delay(doc, 2); | |
358 | mfr = ReadDOC_(doc->virtadr, doc->ioreg); | |
359 | ||
360 | /* CDSN Slow IO register see Software Req 11.4 item 5. */ | |
361 | dummy = ReadDOC(doc->virtadr, CDSNSlowIO); | |
362 | DoC_Delay(doc, 2); | |
363 | id = ReadDOC_(doc->virtadr, doc->ioreg); | |
364 | } | |
365 | ||
366 | /* No response - return failure */ | |
367 | if (mfr == 0xff || mfr == 0) | |
368 | return 0; | |
369 | ||
e5580fbe | 370 | /* Check it's the same as the first chip we identified. |
1da177e4 | 371 | * M-Systems say that any given DiskOnChip device should only |
e5580fbe | 372 | * contain _one_ type of flash part, although that's not a |
1da177e4 LT |
373 | * hardware restriction. */ |
374 | if (doc->mfr) { | |
375 | if (doc->mfr == mfr && doc->id == id) | |
a247b5d5 | 376 | return 1; /* This is the same as the first */ |
1da177e4 LT |
377 | else |
378 | printk(KERN_WARNING | |
379 | "Flash chip at floor %d, chip %d is different:\n", | |
380 | floor, chip); | |
381 | } | |
382 | ||
383 | /* Print and store the manufacturer and ID codes. */ | |
384 | for (i = 0; nand_flash_ids[i].name != NULL; i++) { | |
385 | if (id == nand_flash_ids[i].id) { | |
386 | /* Try to identify manufacturer */ | |
387 | for (j = 0; nand_manuf_ids[j].id != 0x0; j++) { | |
388 | if (nand_manuf_ids[j].id == mfr) | |
389 | break; | |
e5580fbe | 390 | } |
1da177e4 LT |
391 | printk(KERN_INFO |
392 | "Flash chip found: Manufacturer ID: %2.2X, " | |
393 | "Chip ID: %2.2X (%s:%s)\n", mfr, id, | |
394 | nand_manuf_ids[j].name, nand_flash_ids[i].name); | |
395 | if (!doc->mfr) { | |
396 | doc->mfr = mfr; | |
397 | doc->id = id; | |
e5580fbe | 398 | doc->chipshift = |
1da177e4 LT |
399 | ffs((nand_flash_ids[i].chipsize << 20)) - 1; |
400 | doc->page256 = (nand_flash_ids[i].pagesize == 256) ? 1 : 0; | |
401 | doc->pageadrlen = doc->chipshift > 25 ? 3 : 2; | |
402 | doc->erasesize = | |
403 | nand_flash_ids[i].erasesize; | |
404 | return 1; | |
405 | } | |
406 | return 0; | |
407 | } | |
408 | } | |
409 | ||
410 | ||
411 | /* We haven't fully identified the chip. Print as much as we know. */ | |
412 | printk(KERN_WARNING "Unknown flash chip found: %2.2X %2.2X\n", | |
413 | id, mfr); | |
414 | ||
415 | printk(KERN_WARNING "Please report to dwmw2@infradead.org\n"); | |
416 | return 0; | |
417 | } | |
418 | ||
419 | /* DoC_ScanChips: Find all NAND chips present in a DiskOnChip, and identify them */ | |
420 | ||
421 | static void DoC_ScanChips(struct DiskOnChip *this, int maxchips) | |
422 | { | |
423 | int floor, chip; | |
424 | int numchips[MAX_FLOORS]; | |
425 | int ret = 1; | |
426 | ||
427 | this->numchips = 0; | |
428 | this->mfr = 0; | |
429 | this->id = 0; | |
430 | ||
431 | /* For each floor, find the number of valid chips it contains */ | |
432 | for (floor = 0; floor < MAX_FLOORS; floor++) { | |
433 | ret = 1; | |
434 | numchips[floor] = 0; | |
435 | for (chip = 0; chip < maxchips && ret != 0; chip++) { | |
436 | ||
437 | ret = DoC_IdentChip(this, floor, chip); | |
438 | if (ret) { | |
439 | numchips[floor]++; | |
440 | this->numchips++; | |
441 | } | |
442 | } | |
443 | } | |
444 | ||
445 | /* If there are none at all that we recognise, bail */ | |
446 | if (!this->numchips) { | |
447 | printk(KERN_NOTICE "No flash chips recognised.\n"); | |
448 | return; | |
449 | } | |
450 | ||
451 | /* Allocate an array to hold the information for each chip */ | |
452 | this->chips = kmalloc(sizeof(struct Nand) * this->numchips, GFP_KERNEL); | |
453 | if (!this->chips) { | |
454 | printk(KERN_NOTICE "No memory for allocating chip info structures\n"); | |
455 | return; | |
456 | } | |
457 | ||
458 | ret = 0; | |
459 | ||
e5580fbe | 460 | /* Fill out the chip array with {floor, chipno} for each |
1da177e4 LT |
461 | * detected chip in the device. */ |
462 | for (floor = 0; floor < MAX_FLOORS; floor++) { | |
463 | for (chip = 0; chip < numchips[floor]; chip++) { | |
464 | this->chips[ret].floor = floor; | |
465 | this->chips[ret].chip = chip; | |
466 | this->chips[ret].curadr = 0; | |
467 | this->chips[ret].curmode = 0x50; | |
468 | ret++; | |
469 | } | |
470 | } | |
471 | ||
472 | /* Calculate and print the total size of the device */ | |
473 | this->totlen = this->numchips * (1 << this->chipshift); | |
474 | ||
475 | printk(KERN_INFO "%d flash chips found. Total DiskOnChip size: %ld MiB\n", | |
476 | this->numchips, this->totlen >> 20); | |
477 | } | |
478 | ||
479 | static int DoC2k_is_alias(struct DiskOnChip *doc1, struct DiskOnChip *doc2) | |
480 | { | |
481 | int tmp1, tmp2, retval; | |
482 | if (doc1->physadr == doc2->physadr) | |
483 | return 1; | |
484 | ||
485 | /* Use the alias resolution register which was set aside for this | |
486 | * purpose. If it's value is the same on both chips, they might | |
487 | * be the same chip, and we write to one and check for a change in | |
488 | * the other. It's unclear if this register is usuable in the | |
489 | * DoC 2000 (it's in the Millennium docs), but it seems to work. */ | |
490 | tmp1 = ReadDOC(doc1->virtadr, AliasResolution); | |
491 | tmp2 = ReadDOC(doc2->virtadr, AliasResolution); | |
492 | if (tmp1 != tmp2) | |
493 | return 0; | |
494 | ||
495 | WriteDOC((tmp1 + 1) % 0xff, doc1->virtadr, AliasResolution); | |
496 | tmp2 = ReadDOC(doc2->virtadr, AliasResolution); | |
497 | if (tmp2 == (tmp1 + 1) % 0xff) | |
498 | retval = 1; | |
499 | else | |
500 | retval = 0; | |
501 | ||
502 | /* Restore register contents. May not be necessary, but do it just to | |
503 | * be safe. */ | |
504 | WriteDOC(tmp1, doc1->virtadr, AliasResolution); | |
505 | ||
506 | return retval; | |
507 | } | |
508 | ||
5e535429 DW |
509 | /* This routine is found from the docprobe code by symbol_get(), |
510 | * which will bump the use count of this module. */ | |
511 | void DoC2k_init(struct mtd_info *mtd) | |
1da177e4 LT |
512 | { |
513 | struct DiskOnChip *this = mtd->priv; | |
514 | struct DiskOnChip *old = NULL; | |
515 | int maxchips; | |
516 | ||
517 | /* We must avoid being called twice for the same device. */ | |
518 | ||
519 | if (doc2klist) | |
520 | old = doc2klist->priv; | |
521 | ||
522 | while (old) { | |
523 | if (DoC2k_is_alias(old, this)) { | |
524 | printk(KERN_NOTICE | |
525 | "Ignoring DiskOnChip 2000 at 0x%lX - already configured\n", | |
526 | this->physadr); | |
527 | iounmap(this->virtadr); | |
528 | kfree(mtd); | |
529 | return; | |
530 | } | |
531 | if (old->nextdoc) | |
532 | old = old->nextdoc->priv; | |
533 | else | |
534 | old = NULL; | |
535 | } | |
536 | ||
537 | ||
538 | switch (this->ChipID) { | |
539 | case DOC_ChipID_Doc2kTSOP: | |
540 | mtd->name = "DiskOnChip 2000 TSOP"; | |
541 | this->ioreg = DoC_Mil_CDSN_IO; | |
542 | /* Pretend it's a Millennium */ | |
543 | this->ChipID = DOC_ChipID_DocMil; | |
544 | maxchips = MAX_CHIPS; | |
545 | break; | |
546 | case DOC_ChipID_Doc2k: | |
547 | mtd->name = "DiskOnChip 2000"; | |
548 | this->ioreg = DoC_2k_CDSN_IO; | |
549 | maxchips = MAX_CHIPS; | |
550 | break; | |
551 | case DOC_ChipID_DocMil: | |
552 | mtd->name = "DiskOnChip Millennium"; | |
553 | this->ioreg = DoC_Mil_CDSN_IO; | |
554 | maxchips = MAX_CHIPS_MIL; | |
555 | break; | |
556 | default: | |
557 | printk("Unknown ChipID 0x%02x\n", this->ChipID); | |
558 | kfree(mtd); | |
559 | iounmap(this->virtadr); | |
560 | return; | |
561 | } | |
562 | ||
563 | printk(KERN_NOTICE "%s found at address 0x%lX\n", mtd->name, | |
564 | this->physadr); | |
565 | ||
566 | mtd->type = MTD_NANDFLASH; | |
567 | mtd->flags = MTD_CAP_NANDFLASH; | |
1da177e4 LT |
568 | mtd->size = 0; |
569 | mtd->erasesize = 0; | |
28318776 | 570 | mtd->writesize = 512; |
1da177e4 LT |
571 | mtd->oobsize = 16; |
572 | mtd->owner = THIS_MODULE; | |
573 | mtd->erase = doc_erase; | |
574 | mtd->point = NULL; | |
575 | mtd->unpoint = NULL; | |
576 | mtd->read = doc_read; | |
577 | mtd->write = doc_write; | |
1da177e4 LT |
578 | mtd->read_oob = doc_read_oob; |
579 | mtd->write_oob = doc_write_oob; | |
580 | mtd->sync = NULL; | |
581 | ||
582 | this->totlen = 0; | |
583 | this->numchips = 0; | |
584 | ||
585 | this->curfloor = -1; | |
586 | this->curchip = -1; | |
48b19268 | 587 | mutex_init(&this->lock); |
1da177e4 LT |
588 | |
589 | /* Ident all the chips present. */ | |
590 | DoC_ScanChips(this, maxchips); | |
591 | ||
592 | if (!this->totlen) { | |
593 | kfree(mtd); | |
594 | iounmap(this->virtadr); | |
595 | } else { | |
596 | this->nextdoc = doc2klist; | |
597 | doc2klist = mtd; | |
598 | mtd->size = this->totlen; | |
599 | mtd->erasesize = this->erasesize; | |
600 | add_mtd_device(mtd); | |
601 | return; | |
602 | } | |
603 | } | |
5e535429 | 604 | EXPORT_SYMBOL_GPL(DoC2k_init); |
1da177e4 LT |
605 | |
606 | static int doc_read(struct mtd_info *mtd, loff_t from, size_t len, | |
607 | size_t * retlen, u_char * buf) | |
1da177e4 LT |
608 | { |
609 | struct DiskOnChip *this = mtd->priv; | |
610 | void __iomem *docptr = this->virtadr; | |
611 | struct Nand *mychip; | |
7f8a8940 | 612 | unsigned char syndrome[6], eccbuf[6]; |
1da177e4 LT |
613 | volatile char dummy; |
614 | int i, len256 = 0, ret=0; | |
615 | size_t left = len; | |
616 | ||
617 | /* Don't allow read past end of device */ | |
618 | if (from >= this->totlen) | |
619 | return -EINVAL; | |
620 | ||
48b19268 | 621 | mutex_lock(&this->lock); |
1da177e4 LT |
622 | |
623 | *retlen = 0; | |
624 | while (left) { | |
625 | len = left; | |
626 | ||
627 | /* Don't allow a single read to cross a 512-byte block boundary */ | |
628 | if (from + len > ((from | 0x1ff) + 1)) | |
629 | len = ((from | 0x1ff) + 1) - from; | |
630 | ||
631 | /* The ECC will not be calculated correctly if less than 512 is read */ | |
53fb84a0 | 632 | if (len != 0x200) |
1da177e4 LT |
633 | printk(KERN_WARNING |
634 | "ECC needs a full sector read (adr: %lx size %lx)\n", | |
635 | (long) from, (long) len); | |
636 | ||
637 | /* printk("DoC_Read (adr: %lx size %lx)\n", (long) from, (long) len); */ | |
638 | ||
639 | ||
640 | /* Find the chip which is to be used and select it */ | |
641 | mychip = &this->chips[from >> (this->chipshift)]; | |
642 | ||
643 | if (this->curfloor != mychip->floor) { | |
644 | DoC_SelectFloor(this, mychip->floor); | |
645 | DoC_SelectChip(this, mychip->chip); | |
646 | } else if (this->curchip != mychip->chip) { | |
647 | DoC_SelectChip(this, mychip->chip); | |
648 | } | |
649 | ||
650 | this->curfloor = mychip->floor; | |
651 | this->curchip = mychip->chip; | |
652 | ||
653 | DoC_Command(this, | |
654 | (!this->page256 | |
655 | && (from & 0x100)) ? NAND_CMD_READ1 : NAND_CMD_READ0, | |
656 | CDSN_CTRL_WP); | |
657 | DoC_Address(this, ADDR_COLUMN_PAGE, from, CDSN_CTRL_WP, | |
658 | CDSN_CTRL_ECC_IO); | |
659 | ||
7f8a8940 TG |
660 | /* Prime the ECC engine */ |
661 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
662 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); | |
1da177e4 LT |
663 | |
664 | /* treat crossing 256-byte sector for 2M x 8bits devices */ | |
665 | if (this->page256 && from + len > (from | 0xff) + 1) { | |
666 | len256 = (from | 0xff) + 1 - from; | |
667 | DoC_ReadBuf(this, buf, len256); | |
668 | ||
669 | DoC_Command(this, NAND_CMD_READ0, CDSN_CTRL_WP); | |
670 | DoC_Address(this, ADDR_COLUMN_PAGE, from + len256, | |
671 | CDSN_CTRL_WP, CDSN_CTRL_ECC_IO); | |
672 | } | |
673 | ||
674 | DoC_ReadBuf(this, &buf[len256], len - len256); | |
675 | ||
676 | /* Let the caller know we completed it */ | |
677 | *retlen += len; | |
678 | ||
7f8a8940 TG |
679 | /* Read the ECC data through the DiskOnChip ECC logic */ |
680 | /* Note: this will work even with 2M x 8bit devices as */ | |
681 | /* they have 8 bytes of OOB per 256 page. mf. */ | |
682 | DoC_ReadBuf(this, eccbuf, 6); | |
683 | ||
684 | /* Flush the pipeline */ | |
685 | if (DoC_is_Millennium(this)) { | |
686 | dummy = ReadDOC(docptr, ECCConf); | |
687 | dummy = ReadDOC(docptr, ECCConf); | |
688 | i = ReadDOC(docptr, ECCConf); | |
689 | } else { | |
690 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
691 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
692 | i = ReadDOC(docptr, 2k_ECCStatus); | |
693 | } | |
1da177e4 | 694 | |
7f8a8940 TG |
695 | /* Check the ECC Status */ |
696 | if (i & 0x80) { | |
697 | int nb_errors; | |
698 | /* There was an ECC error */ | |
1da177e4 | 699 | #ifdef ECC_DEBUG |
7f8a8940 | 700 | printk(KERN_ERR "DiskOnChip ECC Error: Read at %lx\n", (long)from); |
1da177e4 | 701 | #endif |
7f8a8940 TG |
702 | /* Read the ECC syndrom through the DiskOnChip ECC |
703 | logic. These syndrome will be all ZERO when there | |
704 | is no error */ | |
705 | for (i = 0; i < 6; i++) { | |
706 | syndrome[i] = | |
707 | ReadDOC(docptr, ECCSyndrome0 + i); | |
708 | } | |
709 | nb_errors = doc_decode_ecc(buf, syndrome); | |
1da177e4 LT |
710 | |
711 | #ifdef ECC_DEBUG | |
7f8a8940 | 712 | printk(KERN_ERR "Errors corrected: %x\n", nb_errors); |
1da177e4 | 713 | #endif |
7f8a8940 TG |
714 | if (nb_errors < 0) { |
715 | /* We return error, but have actually done the | |
716 | read. Not that this can be told to | |
717 | user-space, via sys_read(), but at least | |
718 | MTD-aware stuff can know about it by | |
719 | checking *retlen */ | |
720 | ret = -EIO; | |
1da177e4 | 721 | } |
7f8a8940 | 722 | } |
1da177e4 LT |
723 | |
724 | #ifdef PSYCHO_DEBUG | |
7f8a8940 TG |
725 | printk(KERN_DEBUG "ECC DATA at %lxB: %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", |
726 | (long)from, eccbuf[0], eccbuf[1], eccbuf[2], | |
727 | eccbuf[3], eccbuf[4], eccbuf[5]); | |
1da177e4 | 728 | #endif |
e5580fbe | 729 | |
7f8a8940 TG |
730 | /* disable the ECC engine */ |
731 | WriteDOC(DOC_ECC_DIS, docptr , ECCConf); | |
1da177e4 | 732 | |
e5580fbe | 733 | /* according to 11.4.1, we need to wait for the busy line |
1da177e4 LT |
734 | * drop if we read to the end of the page. */ |
735 | if(0 == ((from + len) & 0x1ff)) | |
736 | { | |
737 | DoC_WaitReady(this); | |
738 | } | |
739 | ||
740 | from += len; | |
741 | left -= len; | |
742 | buf += len; | |
743 | } | |
744 | ||
48b19268 | 745 | mutex_unlock(&this->lock); |
1da177e4 LT |
746 | |
747 | return ret; | |
748 | } | |
749 | ||
750 | static int doc_write(struct mtd_info *mtd, loff_t to, size_t len, | |
751 | size_t * retlen, const u_char * buf) | |
1da177e4 LT |
752 | { |
753 | struct DiskOnChip *this = mtd->priv; | |
754 | int di; /* Yes, DI is a hangover from when I was disassembling the binary driver */ | |
755 | void __iomem *docptr = this->virtadr; | |
7f8a8940 | 756 | unsigned char eccbuf[6]; |
1da177e4 LT |
757 | volatile char dummy; |
758 | int len256 = 0; | |
759 | struct Nand *mychip; | |
760 | size_t left = len; | |
761 | int status; | |
762 | ||
763 | /* Don't allow write past end of device */ | |
764 | if (to >= this->totlen) | |
765 | return -EINVAL; | |
766 | ||
48b19268 | 767 | mutex_lock(&this->lock); |
1da177e4 LT |
768 | |
769 | *retlen = 0; | |
770 | while (left) { | |
771 | len = left; | |
772 | ||
773 | /* Don't allow a single write to cross a 512-byte block boundary */ | |
774 | if (to + len > ((to | 0x1ff) + 1)) | |
775 | len = ((to | 0x1ff) + 1) - to; | |
776 | ||
777 | /* The ECC will not be calculated correctly if less than 512 is written */ | |
778 | /* DBB- | |
779 | if (len != 0x200 && eccbuf) | |
780 | printk(KERN_WARNING | |
781 | "ECC needs a full sector write (adr: %lx size %lx)\n", | |
782 | (long) to, (long) len); | |
783 | -DBB */ | |
784 | ||
785 | /* printk("DoC_Write (adr: %lx size %lx)\n", (long) to, (long) len); */ | |
786 | ||
787 | /* Find the chip which is to be used and select it */ | |
788 | mychip = &this->chips[to >> (this->chipshift)]; | |
789 | ||
790 | if (this->curfloor != mychip->floor) { | |
791 | DoC_SelectFloor(this, mychip->floor); | |
792 | DoC_SelectChip(this, mychip->chip); | |
793 | } else if (this->curchip != mychip->chip) { | |
794 | DoC_SelectChip(this, mychip->chip); | |
795 | } | |
796 | ||
797 | this->curfloor = mychip->floor; | |
798 | this->curchip = mychip->chip; | |
799 | ||
800 | /* Set device to main plane of flash */ | |
801 | DoC_Command(this, NAND_CMD_RESET, CDSN_CTRL_WP); | |
802 | DoC_Command(this, | |
803 | (!this->page256 | |
804 | && (to & 0x100)) ? NAND_CMD_READ1 : NAND_CMD_READ0, | |
805 | CDSN_CTRL_WP); | |
806 | ||
807 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
808 | DoC_Address(this, ADDR_COLUMN_PAGE, to, 0, CDSN_CTRL_ECC_IO); | |
809 | ||
7f8a8940 TG |
810 | /* Prime the ECC engine */ |
811 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
812 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); | |
1da177e4 LT |
813 | |
814 | /* treat crossing 256-byte sector for 2M x 8bits devices */ | |
815 | if (this->page256 && to + len > (to | 0xff) + 1) { | |
816 | len256 = (to | 0xff) + 1 - to; | |
817 | DoC_WriteBuf(this, buf, len256); | |
818 | ||
819 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
820 | ||
821 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
822 | /* There's an implicit DoC_WaitReady() in DoC_Command */ | |
823 | ||
824 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
825 | DoC_Delay(this, 2); | |
826 | ||
827 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
828 | printk(KERN_ERR "Error programming flash\n"); | |
829 | /* Error in programming */ | |
830 | *retlen = 0; | |
48b19268 | 831 | mutex_unlock(&this->lock); |
1da177e4 LT |
832 | return -EIO; |
833 | } | |
834 | ||
835 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
836 | DoC_Address(this, ADDR_COLUMN_PAGE, to + len256, 0, | |
837 | CDSN_CTRL_ECC_IO); | |
838 | } | |
839 | ||
840 | DoC_WriteBuf(this, &buf[len256], len - len256); | |
841 | ||
7f8a8940 | 842 | WriteDOC(CDSN_CTRL_ECC_IO | CDSN_CTRL_CE, docptr, CDSNControl); |
1da177e4 | 843 | |
7f8a8940 TG |
844 | if (DoC_is_Millennium(this)) { |
845 | WriteDOC(0, docptr, NOP); | |
846 | WriteDOC(0, docptr, NOP); | |
847 | WriteDOC(0, docptr, NOP); | |
848 | } else { | |
849 | WriteDOC_(0, docptr, this->ioreg); | |
850 | WriteDOC_(0, docptr, this->ioreg); | |
851 | WriteDOC_(0, docptr, this->ioreg); | |
852 | } | |
1da177e4 | 853 | |
7f8a8940 TG |
854 | WriteDOC(CDSN_CTRL_ECC_IO | CDSN_CTRL_FLASH_IO | CDSN_CTRL_CE, docptr, |
855 | CDSNControl); | |
856 | ||
857 | /* Read the ECC data through the DiskOnChip ECC logic */ | |
858 | for (di = 0; di < 6; di++) { | |
859 | eccbuf[di] = ReadDOC(docptr, ECCSyndrome0 + di); | |
860 | } | |
1da177e4 | 861 | |
7f8a8940 TG |
862 | /* Reset the ECC engine */ |
863 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
1da177e4 LT |
864 | |
865 | #ifdef PSYCHO_DEBUG | |
7f8a8940 TG |
866 | printk |
867 | ("OOB data at %lx is %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", | |
868 | (long) to, eccbuf[0], eccbuf[1], eccbuf[2], eccbuf[3], | |
869 | eccbuf[4], eccbuf[5]); | |
1da177e4 | 870 | #endif |
1da177e4 LT |
871 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); |
872 | ||
873 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
874 | /* There's an implicit DoC_WaitReady() in DoC_Command */ | |
875 | ||
876 | if (DoC_is_Millennium(this)) { | |
877 | ReadDOC(docptr, ReadPipeInit); | |
878 | status = ReadDOC(docptr, LastDataRead); | |
879 | } else { | |
880 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
881 | DoC_Delay(this, 2); | |
882 | status = ReadDOC_(docptr, this->ioreg); | |
883 | } | |
884 | ||
885 | if (status & 1) { | |
886 | printk(KERN_ERR "Error programming flash\n"); | |
887 | /* Error in programming */ | |
888 | *retlen = 0; | |
48b19268 | 889 | mutex_unlock(&this->lock); |
1da177e4 LT |
890 | return -EIO; |
891 | } | |
892 | ||
893 | /* Let the caller know we completed it */ | |
894 | *retlen += len; | |
e5580fbe | 895 | |
53fb84a0 | 896 | { |
1da177e4 LT |
897 | unsigned char x[8]; |
898 | size_t dummy; | |
899 | int ret; | |
900 | ||
901 | /* Write the ECC data to flash */ | |
902 | for (di=0; di<6; di++) | |
903 | x[di] = eccbuf[di]; | |
e5580fbe | 904 | |
1da177e4 LT |
905 | x[6]=0x55; |
906 | x[7]=0x55; | |
e5580fbe | 907 | |
1da177e4 LT |
908 | ret = doc_write_oob_nolock(mtd, to, 8, &dummy, x); |
909 | if (ret) { | |
48b19268 | 910 | mutex_unlock(&this->lock); |
1da177e4 LT |
911 | return ret; |
912 | } | |
913 | } | |
914 | ||
915 | to += len; | |
916 | left -= len; | |
917 | buf += len; | |
918 | } | |
919 | ||
48b19268 | 920 | mutex_unlock(&this->lock); |
1da177e4 LT |
921 | return 0; |
922 | } | |
923 | ||
8593fbc6 TG |
924 | static int doc_read_oob(struct mtd_info *mtd, loff_t ofs, |
925 | struct mtd_oob_ops *ops) | |
1da177e4 LT |
926 | { |
927 | struct DiskOnChip *this = mtd->priv; | |
928 | int len256 = 0, ret; | |
929 | struct Nand *mychip; | |
8593fbc6 TG |
930 | uint8_t *buf = ops->oobbuf; |
931 | size_t len = ops->len; | |
932 | ||
933 | BUG_ON(ops->mode != MTD_OOB_PLACE); | |
934 | ||
935 | ofs += ops->ooboffs; | |
1da177e4 | 936 | |
48b19268 | 937 | mutex_lock(&this->lock); |
1da177e4 LT |
938 | |
939 | mychip = &this->chips[ofs >> this->chipshift]; | |
940 | ||
941 | if (this->curfloor != mychip->floor) { | |
942 | DoC_SelectFloor(this, mychip->floor); | |
943 | DoC_SelectChip(this, mychip->chip); | |
944 | } else if (this->curchip != mychip->chip) { | |
945 | DoC_SelectChip(this, mychip->chip); | |
946 | } | |
947 | this->curfloor = mychip->floor; | |
948 | this->curchip = mychip->chip; | |
949 | ||
950 | /* update address for 2M x 8bit devices. OOB starts on the second */ | |
951 | /* page to maintain compatibility with doc_read_ecc. */ | |
952 | if (this->page256) { | |
953 | if (!(ofs & 0x8)) | |
954 | ofs += 0x100; | |
955 | else | |
956 | ofs -= 0x8; | |
957 | } | |
958 | ||
959 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
960 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs, CDSN_CTRL_WP, 0); | |
961 | ||
962 | /* treat crossing 8-byte OOB data for 2M x 8bit devices */ | |
963 | /* Note: datasheet says it should automaticaly wrap to the */ | |
964 | /* next OOB block, but it didn't work here. mf. */ | |
965 | if (this->page256 && ofs + len > (ofs | 0x7) + 1) { | |
966 | len256 = (ofs | 0x7) + 1 - ofs; | |
967 | DoC_ReadBuf(this, buf, len256); | |
968 | ||
969 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
970 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs & (~0x1ff), | |
971 | CDSN_CTRL_WP, 0); | |
972 | } | |
973 | ||
974 | DoC_ReadBuf(this, &buf[len256], len - len256); | |
975 | ||
8593fbc6 | 976 | ops->retlen = len; |
1da177e4 LT |
977 | /* Reading the full OOB data drops us off of the end of the page, |
978 | * causing the flash device to go into busy mode, so we need | |
979 | * to wait until ready 11.4.1 and Toshiba TC58256FT docs */ | |
e5580fbe | 980 | |
1da177e4 LT |
981 | ret = DoC_WaitReady(this); |
982 | ||
48b19268 | 983 | mutex_unlock(&this->lock); |
1da177e4 LT |
984 | return ret; |
985 | ||
986 | } | |
987 | ||
988 | static int doc_write_oob_nolock(struct mtd_info *mtd, loff_t ofs, size_t len, | |
989 | size_t * retlen, const u_char * buf) | |
990 | { | |
991 | struct DiskOnChip *this = mtd->priv; | |
992 | int len256 = 0; | |
993 | void __iomem *docptr = this->virtadr; | |
994 | struct Nand *mychip = &this->chips[ofs >> this->chipshift]; | |
995 | volatile int dummy; | |
996 | int status; | |
997 | ||
998 | // 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, | |
999 | // buf[0], buf[1], buf[2], buf[3], buf[8], buf[9], buf[14],buf[15]); | |
1000 | ||
1001 | /* Find the chip which is to be used and select it */ | |
1002 | if (this->curfloor != mychip->floor) { | |
1003 | DoC_SelectFloor(this, mychip->floor); | |
1004 | DoC_SelectChip(this, mychip->chip); | |
1005 | } else if (this->curchip != mychip->chip) { | |
1006 | DoC_SelectChip(this, mychip->chip); | |
1007 | } | |
1008 | this->curfloor = mychip->floor; | |
1009 | this->curchip = mychip->chip; | |
1010 | ||
1011 | /* disable the ECC engine */ | |
1012 | WriteDOC (DOC_ECC_RESET, docptr, ECCConf); | |
1013 | WriteDOC (DOC_ECC_DIS, docptr, ECCConf); | |
1014 | ||
1015 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
1016 | DoC_Command(this, NAND_CMD_RESET, CDSN_CTRL_WP); | |
1017 | ||
1018 | /* issue the Read2 command to set the pointer to the Spare Data Area. */ | |
1019 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
1020 | ||
1021 | /* update address for 2M x 8bit devices. OOB starts on the second */ | |
1022 | /* page to maintain compatibility with doc_read_ecc. */ | |
1023 | if (this->page256) { | |
1024 | if (!(ofs & 0x8)) | |
1025 | ofs += 0x100; | |
1026 | else | |
1027 | ofs -= 0x8; | |
1028 | } | |
1029 | ||
1030 | /* issue the Serial Data In command to initial the Page Program process */ | |
1031 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1032 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs, 0, 0); | |
1033 | ||
1034 | /* treat crossing 8-byte OOB data for 2M x 8bit devices */ | |
1035 | /* Note: datasheet says it should automaticaly wrap to the */ | |
1036 | /* next OOB block, but it didn't work here. mf. */ | |
1037 | if (this->page256 && ofs + len > (ofs | 0x7) + 1) { | |
1038 | len256 = (ofs | 0x7) + 1 - ofs; | |
1039 | DoC_WriteBuf(this, buf, len256); | |
1040 | ||
1041 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1042 | DoC_Command(this, NAND_CMD_STATUS, 0); | |
1043 | /* DoC_WaitReady() is implicit in DoC_Command */ | |
1044 | ||
1045 | if (DoC_is_Millennium(this)) { | |
1046 | ReadDOC(docptr, ReadPipeInit); | |
1047 | status = ReadDOC(docptr, LastDataRead); | |
1048 | } else { | |
1049 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1050 | DoC_Delay(this, 2); | |
1051 | status = ReadDOC_(docptr, this->ioreg); | |
1052 | } | |
1053 | ||
1054 | if (status & 1) { | |
1055 | printk(KERN_ERR "Error programming oob data\n"); | |
1056 | /* There was an error */ | |
1057 | *retlen = 0; | |
1058 | return -EIO; | |
1059 | } | |
1060 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1061 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs & (~0x1ff), 0, 0); | |
1062 | } | |
1063 | ||
1064 | DoC_WriteBuf(this, &buf[len256], len - len256); | |
1065 | ||
1066 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1067 | DoC_Command(this, NAND_CMD_STATUS, 0); | |
1068 | /* DoC_WaitReady() is implicit in DoC_Command */ | |
1069 | ||
1070 | if (DoC_is_Millennium(this)) { | |
1071 | ReadDOC(docptr, ReadPipeInit); | |
1072 | status = ReadDOC(docptr, LastDataRead); | |
1073 | } else { | |
1074 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1075 | DoC_Delay(this, 2); | |
1076 | status = ReadDOC_(docptr, this->ioreg); | |
1077 | } | |
1078 | ||
1079 | if (status & 1) { | |
1080 | printk(KERN_ERR "Error programming oob data\n"); | |
1081 | /* There was an error */ | |
1082 | *retlen = 0; | |
1083 | return -EIO; | |
1084 | } | |
1085 | ||
1086 | *retlen = len; | |
1087 | return 0; | |
1088 | ||
1089 | } | |
e5580fbe | 1090 | |
8593fbc6 TG |
1091 | static int doc_write_oob(struct mtd_info *mtd, loff_t ofs, |
1092 | struct mtd_oob_ops *ops) | |
1da177e4 | 1093 | { |
8593fbc6 TG |
1094 | struct DiskOnChip *this = mtd->priv; |
1095 | int ret; | |
1da177e4 | 1096 | |
8593fbc6 | 1097 | BUG_ON(ops->mode != MTD_OOB_PLACE); |
1da177e4 | 1098 | |
8593fbc6 TG |
1099 | mutex_lock(&this->lock); |
1100 | ret = doc_write_oob_nolock(mtd, ofs + ops->ooboffs, ops->len, | |
1101 | &ops->retlen, ops->oobbuf); | |
1102 | ||
1103 | mutex_unlock(&this->lock); | |
1104 | return ret; | |
1da177e4 LT |
1105 | } |
1106 | ||
1107 | static int doc_erase(struct mtd_info *mtd, struct erase_info *instr) | |
1108 | { | |
1109 | struct DiskOnChip *this = mtd->priv; | |
1110 | __u32 ofs = instr->addr; | |
1111 | __u32 len = instr->len; | |
1112 | volatile int dummy; | |
1113 | void __iomem *docptr = this->virtadr; | |
1114 | struct Nand *mychip; | |
1115 | int status; | |
1116 | ||
48b19268 | 1117 | mutex_lock(&this->lock); |
1da177e4 LT |
1118 | |
1119 | if (ofs & (mtd->erasesize-1) || len & (mtd->erasesize-1)) { | |
48b19268 | 1120 | mutex_unlock(&this->lock); |
1da177e4 LT |
1121 | return -EINVAL; |
1122 | } | |
1123 | ||
1124 | instr->state = MTD_ERASING; | |
e5580fbe | 1125 | |
1da177e4 LT |
1126 | /* FIXME: Do this in the background. Use timers or schedule_task() */ |
1127 | while(len) { | |
1128 | mychip = &this->chips[ofs >> this->chipshift]; | |
1129 | ||
1130 | if (this->curfloor != mychip->floor) { | |
1131 | DoC_SelectFloor(this, mychip->floor); | |
1132 | DoC_SelectChip(this, mychip->chip); | |
1133 | } else if (this->curchip != mychip->chip) { | |
1134 | DoC_SelectChip(this, mychip->chip); | |
1135 | } | |
1136 | this->curfloor = mychip->floor; | |
1137 | this->curchip = mychip->chip; | |
1138 | ||
1139 | DoC_Command(this, NAND_CMD_ERASE1, 0); | |
1140 | DoC_Address(this, ADDR_PAGE, ofs, 0, 0); | |
1141 | DoC_Command(this, NAND_CMD_ERASE2, 0); | |
1142 | ||
1143 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
1144 | ||
1145 | if (DoC_is_Millennium(this)) { | |
1146 | ReadDOC(docptr, ReadPipeInit); | |
1147 | status = ReadDOC(docptr, LastDataRead); | |
1148 | } else { | |
1149 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1150 | DoC_Delay(this, 2); | |
1151 | status = ReadDOC_(docptr, this->ioreg); | |
1152 | } | |
1153 | ||
1154 | if (status & 1) { | |
1155 | printk(KERN_ERR "Error erasing at 0x%x\n", ofs); | |
1156 | /* There was an error */ | |
1157 | instr->state = MTD_ERASE_FAILED; | |
1158 | goto callback; | |
1159 | } | |
1160 | ofs += mtd->erasesize; | |
1161 | len -= mtd->erasesize; | |
1162 | } | |
1163 | instr->state = MTD_ERASE_DONE; | |
1164 | ||
1165 | callback: | |
1166 | mtd_erase_callback(instr); | |
1167 | ||
48b19268 | 1168 | mutex_unlock(&this->lock); |
1da177e4 LT |
1169 | return 0; |
1170 | } | |
1171 | ||
1172 | ||
1173 | /**************************************************************************** | |
1174 | * | |
1175 | * Module stuff | |
1176 | * | |
1177 | ****************************************************************************/ | |
1178 | ||
1da177e4 LT |
1179 | static void __exit cleanup_doc2000(void) |
1180 | { | |
1181 | struct mtd_info *mtd; | |
1182 | struct DiskOnChip *this; | |
1183 | ||
1184 | while ((mtd = doc2klist)) { | |
1185 | this = mtd->priv; | |
1186 | doc2klist = this->nextdoc; | |
1187 | ||
1188 | del_mtd_device(mtd); | |
1189 | ||
1190 | iounmap(this->virtadr); | |
1191 | kfree(this->chips); | |
1192 | kfree(mtd); | |
1193 | } | |
1da177e4 LT |
1194 | } |
1195 | ||
1196 | module_exit(cleanup_doc2000); | |
1da177e4 LT |
1197 | |
1198 | MODULE_LICENSE("GPL"); | |
1199 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org> et al."); | |
1200 | MODULE_DESCRIPTION("MTD driver for DiskOnChip 2000 and Millennium"); | |
1201 |