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1da177e4 LT |
1 | /* |
2 | * Linux driver for Disk-On-Chip Millennium Plus | |
3 | * | |
4 | * (c) 2002-2003 Greg Ungerer <gerg@snapgear.com> | |
5 | * (c) 2002-2003 SnapGear Inc | |
6 | * (c) 1999 Machine Vision Holdings, Inc. | |
7 | * (c) 1999, 2000 David Woodhouse <dwmw2@infradead.org> | |
8 | * | |
1da177e4 LT |
9 | * Released under GPL |
10 | */ | |
11 | ||
12 | #include <linux/kernel.h> | |
13 | #include <linux/module.h> | |
14 | #include <asm/errno.h> | |
15 | #include <asm/io.h> | |
16 | #include <asm/uaccess.h> | |
1da177e4 LT |
17 | #include <linux/delay.h> |
18 | #include <linux/slab.h> | |
1da177e4 LT |
19 | #include <linux/init.h> |
20 | #include <linux/types.h> | |
21 | #include <linux/bitops.h> | |
22 | ||
23 | #include <linux/mtd/mtd.h> | |
24 | #include <linux/mtd/nand.h> | |
25 | #include <linux/mtd/doc2000.h> | |
26 | ||
27 | /* #define ECC_DEBUG */ | |
28 | ||
29 | /* I have no idea why some DoC chips can not use memcop_form|to_io(). | |
30 | * This may be due to the different revisions of the ASIC controller built-in or | |
31 | * simplily a QA/Bug issue. Who knows ?? If you have trouble, please uncomment | |
32 | * this:*/ | |
33 | #undef USE_MEMCPY | |
34 | ||
35 | static int doc_read(struct mtd_info *mtd, loff_t from, size_t len, | |
36 | size_t *retlen, u_char *buf); | |
37 | static int doc_write(struct mtd_info *mtd, loff_t to, size_t len, | |
38 | size_t *retlen, const u_char *buf); | |
8593fbc6 TG |
39 | static int doc_read_oob(struct mtd_info *mtd, loff_t ofs, |
40 | struct mtd_oob_ops *ops); | |
41 | static int doc_write_oob(struct mtd_info *mtd, loff_t ofs, | |
42 | struct mtd_oob_ops *ops); | |
1da177e4 LT |
43 | static int doc_erase (struct mtd_info *mtd, struct erase_info *instr); |
44 | ||
45 | static struct mtd_info *docmilpluslist = NULL; | |
46 | ||
47 | ||
48 | /* Perform the required delay cycles by writing to the NOP register */ | |
49 | static void DoC_Delay(void __iomem * docptr, int cycles) | |
50 | { | |
51 | int i; | |
52 | ||
53 | for (i = 0; (i < cycles); i++) | |
54 | WriteDOC(0, docptr, Mplus_NOP); | |
55 | } | |
56 | ||
57 | #define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1) | |
58 | ||
59 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
60 | static int _DoC_WaitReady(void __iomem * docptr) | |
61 | { | |
62 | unsigned int c = 0xffff; | |
63 | ||
289c0522 | 64 | pr_debug("_DoC_WaitReady called for out-of-line wait\n"); |
1da177e4 LT |
65 | |
66 | /* Out-of-line routine to wait for chip response */ | |
67 | while (((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) && --c) | |
68 | ; | |
69 | ||
70 | if (c == 0) | |
289c0522 | 71 | pr_debug("_DoC_WaitReady timed out.\n"); |
1da177e4 LT |
72 | |
73 | return (c == 0); | |
74 | } | |
75 | ||
76 | static inline int DoC_WaitReady(void __iomem * docptr) | |
77 | { | |
78 | /* This is inline, to optimise the common case, where it's ready instantly */ | |
79 | int ret = 0; | |
80 | ||
81 | /* read form NOP register should be issued prior to the read from CDSNControl | |
82 | see Software Requirement 11.4 item 2. */ | |
83 | DoC_Delay(docptr, 4); | |
84 | ||
85 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) | |
86 | /* Call the out-of-line routine to wait */ | |
87 | ret = _DoC_WaitReady(docptr); | |
88 | ||
89 | return ret; | |
90 | } | |
91 | ||
25985edc | 92 | /* For some reason the Millennium Plus seems to occasionally put itself |
1da177e4 LT |
93 | * into reset mode. For me this happens randomly, with no pattern that I |
94 | * can detect. M-systems suggest always check this on any block level | |
95 | * operation and setting to normal mode if in reset mode. | |
96 | */ | |
97 | static inline void DoC_CheckASIC(void __iomem * docptr) | |
98 | { | |
99 | /* Make sure the DoC is in normal mode */ | |
100 | if ((ReadDOC(docptr, Mplus_DOCControl) & DOC_MODE_NORMAL) == 0) { | |
101 | WriteDOC((DOC_MODE_NORMAL | DOC_MODE_MDWREN), docptr, Mplus_DOCControl); | |
102 | WriteDOC(~(DOC_MODE_NORMAL | DOC_MODE_MDWREN), docptr, Mplus_CtrlConfirm); | |
103 | } | |
104 | } | |
105 | ||
106 | /* DoC_Command: Send a flash command to the flash chip through the Flash | |
107 | * command register. Need 2 Write Pipeline Terminates to complete send. | |
108 | */ | |
858119e1 | 109 | static void DoC_Command(void __iomem * docptr, unsigned char command, |
1da177e4 LT |
110 | unsigned char xtraflags) |
111 | { | |
112 | WriteDOC(command, docptr, Mplus_FlashCmd); | |
113 | WriteDOC(command, docptr, Mplus_WritePipeTerm); | |
114 | WriteDOC(command, docptr, Mplus_WritePipeTerm); | |
115 | } | |
116 | ||
117 | /* DoC_Address: Set the current address for the flash chip through the Flash | |
118 | * Address register. Need 2 Write Pipeline Terminates to complete send. | |
119 | */ | |
120 | static inline void DoC_Address(struct DiskOnChip *doc, int numbytes, | |
121 | unsigned long ofs, unsigned char xtraflags1, | |
122 | unsigned char xtraflags2) | |
123 | { | |
124 | void __iomem * docptr = doc->virtadr; | |
125 | ||
126 | /* Allow for possible Mill Plus internal flash interleaving */ | |
127 | ofs >>= doc->interleave; | |
128 | ||
129 | switch (numbytes) { | |
130 | case 1: | |
131 | /* Send single byte, bits 0-7. */ | |
132 | WriteDOC(ofs & 0xff, docptr, Mplus_FlashAddress); | |
133 | break; | |
134 | case 2: | |
135 | /* Send bits 9-16 followed by 17-23 */ | |
136 | WriteDOC((ofs >> 9) & 0xff, docptr, Mplus_FlashAddress); | |
137 | WriteDOC((ofs >> 17) & 0xff, docptr, Mplus_FlashAddress); | |
138 | break; | |
139 | case 3: | |
140 | /* Send 0-7, 9-16, then 17-23 */ | |
141 | WriteDOC(ofs & 0xff, docptr, Mplus_FlashAddress); | |
142 | WriteDOC((ofs >> 9) & 0xff, docptr, Mplus_FlashAddress); | |
143 | WriteDOC((ofs >> 17) & 0xff, docptr, Mplus_FlashAddress); | |
144 | break; | |
145 | default: | |
146 | return; | |
147 | } | |
148 | ||
149 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
150 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
151 | } | |
152 | ||
153 | /* DoC_SelectChip: Select a given flash chip within the current floor */ | |
154 | static int DoC_SelectChip(void __iomem * docptr, int chip) | |
155 | { | |
156 | /* No choice for flash chip on Millennium Plus */ | |
157 | return 0; | |
158 | } | |
159 | ||
160 | /* DoC_SelectFloor: Select a given floor (bank of flash chips) */ | |
161 | static int DoC_SelectFloor(void __iomem * docptr, int floor) | |
162 | { | |
163 | WriteDOC((floor & 0x3), docptr, Mplus_DeviceSelect); | |
164 | return 0; | |
165 | } | |
166 | ||
167 | /* | |
168 | * Translate the given offset into the appropriate command and offset. | |
169 | * This does the mapping using the 16bit interleave layout defined by | |
170 | * M-Systems, and looks like this for a sector pair: | |
171 | * +-----------+-------+-------+-------+--------------+---------+-----------+ | |
172 | * | 0 --- 511 |512-517|518-519|520-521| 522 --- 1033 |1034-1039|1040 - 1055| | |
173 | * +-----------+-------+-------+-------+--------------+---------+-----------+ | |
174 | * | Data 0 | ECC 0 |Flags0 |Flags1 | Data 1 |ECC 1 | OOB 1 + 2 | | |
175 | * +-----------+-------+-------+-------+--------------+---------+-----------+ | |
176 | */ | |
177 | /* FIXME: This lives in INFTL not here. Other users of flash devices | |
178 | may not want it */ | |
179 | static unsigned int DoC_GetDataOffset(struct mtd_info *mtd, loff_t *from) | |
180 | { | |
181 | struct DiskOnChip *this = mtd->priv; | |
182 | ||
183 | if (this->interleave) { | |
184 | unsigned int ofs = *from & 0x3ff; | |
185 | unsigned int cmd; | |
186 | ||
187 | if (ofs < 512) { | |
188 | cmd = NAND_CMD_READ0; | |
189 | ofs &= 0x1ff; | |
190 | } else if (ofs < 1014) { | |
191 | cmd = NAND_CMD_READ1; | |
192 | ofs = (ofs & 0x1ff) + 10; | |
193 | } else { | |
194 | cmd = NAND_CMD_READOOB; | |
195 | ofs = ofs - 1014; | |
196 | } | |
197 | ||
198 | *from = (*from & ~0x3ff) | ofs; | |
199 | return cmd; | |
200 | } else { | |
201 | /* No interleave */ | |
202 | if ((*from) & 0x100) | |
203 | return NAND_CMD_READ1; | |
204 | return NAND_CMD_READ0; | |
205 | } | |
206 | } | |
207 | ||
208 | static unsigned int DoC_GetECCOffset(struct mtd_info *mtd, loff_t *from) | |
209 | { | |
210 | unsigned int ofs, cmd; | |
211 | ||
212 | if (*from & 0x200) { | |
213 | cmd = NAND_CMD_READOOB; | |
214 | ofs = 10 + (*from & 0xf); | |
215 | } else { | |
216 | cmd = NAND_CMD_READ1; | |
217 | ofs = (*from & 0xf); | |
218 | } | |
219 | ||
220 | *from = (*from & ~0x3ff) | ofs; | |
221 | return cmd; | |
222 | } | |
223 | ||
224 | static unsigned int DoC_GetFlagsOffset(struct mtd_info *mtd, loff_t *from) | |
225 | { | |
226 | unsigned int ofs, cmd; | |
227 | ||
228 | cmd = NAND_CMD_READ1; | |
229 | ofs = (*from & 0x200) ? 8 : 6; | |
230 | *from = (*from & ~0x3ff) | ofs; | |
231 | return cmd; | |
232 | } | |
233 | ||
234 | static unsigned int DoC_GetHdrOffset(struct mtd_info *mtd, loff_t *from) | |
235 | { | |
236 | unsigned int ofs, cmd; | |
237 | ||
238 | cmd = NAND_CMD_READOOB; | |
239 | ofs = (*from & 0x200) ? 24 : 16; | |
240 | *from = (*from & ~0x3ff) | ofs; | |
241 | return cmd; | |
242 | } | |
243 | ||
244 | static inline void MemReadDOC(void __iomem * docptr, unsigned char *buf, int len) | |
245 | { | |
246 | #ifndef USE_MEMCPY | |
247 | int i; | |
248 | for (i = 0; i < len; i++) | |
249 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO + i); | |
250 | #else | |
251 | memcpy_fromio(buf, docptr + DoC_Mil_CDSN_IO, len); | |
252 | #endif | |
253 | } | |
254 | ||
255 | static inline void MemWriteDOC(void __iomem * docptr, unsigned char *buf, int len) | |
256 | { | |
257 | #ifndef USE_MEMCPY | |
258 | int i; | |
259 | for (i = 0; i < len; i++) | |
260 | WriteDOC(buf[i], docptr, Mil_CDSN_IO + i); | |
261 | #else | |
262 | memcpy_toio(docptr + DoC_Mil_CDSN_IO, buf, len); | |
263 | #endif | |
264 | } | |
265 | ||
266 | /* DoC_IdentChip: Identify a given NAND chip given {floor,chip} */ | |
267 | static int DoC_IdentChip(struct DiskOnChip *doc, int floor, int chip) | |
268 | { | |
269 | int mfr, id, i, j; | |
270 | volatile char dummy; | |
271 | void __iomem * docptr = doc->virtadr; | |
272 | ||
273 | /* Page in the required floor/chip */ | |
274 | DoC_SelectFloor(docptr, floor); | |
275 | DoC_SelectChip(docptr, chip); | |
276 | ||
277 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
278 | WriteDOC((DOC_FLASH_CE | DOC_FLASH_WP), docptr, Mplus_FlashSelect); | |
279 | ||
280 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
281 | DoC_Command(docptr, NAND_CMD_RESET, 0); | |
282 | DoC_WaitReady(docptr); | |
283 | ||
e5580fbe | 284 | /* Read the NAND chip ID: 1. Send ReadID command */ |
1da177e4 LT |
285 | DoC_Command(docptr, NAND_CMD_READID, 0); |
286 | ||
e5580fbe | 287 | /* Read the NAND chip ID: 2. Send address byte zero */ |
1da177e4 LT |
288 | DoC_Address(doc, 1, 0x00, 0, 0x00); |
289 | ||
290 | WriteDOC(0, docptr, Mplus_FlashControl); | |
291 | DoC_WaitReady(docptr); | |
292 | ||
293 | /* Read the manufacturer and device id codes of the flash device through | |
294 | CDSN IO register see Software Requirement 11.4 item 5.*/ | |
295 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
296 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
297 | ||
298 | mfr = ReadDOC(docptr, Mil_CDSN_IO); | |
299 | if (doc->interleave) | |
300 | dummy = ReadDOC(docptr, Mil_CDSN_IO); /* 2 way interleave */ | |
301 | ||
302 | id = ReadDOC(docptr, Mil_CDSN_IO); | |
303 | if (doc->interleave) | |
304 | dummy = ReadDOC(docptr, Mil_CDSN_IO); /* 2 way interleave */ | |
305 | ||
306 | dummy = ReadDOC(docptr, Mplus_LastDataRead); | |
307 | dummy = ReadDOC(docptr, Mplus_LastDataRead); | |
308 | ||
309 | /* Disable flash internally */ | |
310 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
311 | ||
312 | /* No response - return failure */ | |
313 | if (mfr == 0xff || mfr == 0) | |
314 | return 0; | |
315 | ||
316 | for (i = 0; nand_flash_ids[i].name != NULL; i++) { | |
317 | if (id == nand_flash_ids[i].id) { | |
318 | /* Try to identify manufacturer */ | |
319 | for (j = 0; nand_manuf_ids[j].id != 0x0; j++) { | |
320 | if (nand_manuf_ids[j].id == mfr) | |
321 | break; | |
322 | } | |
323 | printk(KERN_INFO "Flash chip found: Manufacturer ID: %2.2X, " | |
324 | "Chip ID: %2.2X (%s:%s)\n", mfr, id, | |
325 | nand_manuf_ids[j].name, nand_flash_ids[i].name); | |
326 | doc->mfr = mfr; | |
327 | doc->id = id; | |
328 | doc->chipshift = ffs((nand_flash_ids[i].chipsize << 20)) - 1; | |
329 | doc->erasesize = nand_flash_ids[i].erasesize << doc->interleave; | |
330 | break; | |
331 | } | |
332 | } | |
333 | ||
334 | if (nand_flash_ids[i].name == NULL) | |
335 | return 0; | |
336 | return 1; | |
337 | } | |
338 | ||
339 | /* DoC_ScanChips: Find all NAND chips present in a DiskOnChip, and identify them */ | |
340 | static void DoC_ScanChips(struct DiskOnChip *this) | |
341 | { | |
342 | int floor, chip; | |
343 | int numchips[MAX_FLOORS_MPLUS]; | |
344 | int ret; | |
345 | ||
346 | this->numchips = 0; | |
347 | this->mfr = 0; | |
348 | this->id = 0; | |
349 | ||
350 | /* Work out the intended interleave setting */ | |
351 | this->interleave = 0; | |
352 | if (this->ChipID == DOC_ChipID_DocMilPlus32) | |
353 | this->interleave = 1; | |
354 | ||
355 | /* Check the ASIC agrees */ | |
e5580fbe | 356 | if ( (this->interleave << 2) != |
1da177e4 LT |
357 | (ReadDOC(this->virtadr, Mplus_Configuration) & 4)) { |
358 | u_char conf = ReadDOC(this->virtadr, Mplus_Configuration); | |
359 | printk(KERN_NOTICE "Setting DiskOnChip Millennium Plus interleave to %s\n", | |
360 | this->interleave?"on (16-bit)":"off (8-bit)"); | |
361 | conf ^= 4; | |
362 | WriteDOC(conf, this->virtadr, Mplus_Configuration); | |
363 | } | |
364 | ||
365 | /* For each floor, find the number of valid chips it contains */ | |
366 | for (floor = 0,ret = 1; floor < MAX_FLOORS_MPLUS; floor++) { | |
367 | numchips[floor] = 0; | |
368 | for (chip = 0; chip < MAX_CHIPS_MPLUS && ret != 0; chip++) { | |
369 | ret = DoC_IdentChip(this, floor, chip); | |
370 | if (ret) { | |
371 | numchips[floor]++; | |
372 | this->numchips++; | |
373 | } | |
374 | } | |
375 | } | |
376 | /* If there are none at all that we recognise, bail */ | |
377 | if (!this->numchips) { | |
378 | printk("No flash chips recognised.\n"); | |
379 | return; | |
380 | } | |
381 | ||
382 | /* Allocate an array to hold the information for each chip */ | |
383 | this->chips = kmalloc(sizeof(struct Nand) * this->numchips, GFP_KERNEL); | |
384 | if (!this->chips){ | |
385 | printk("MTD: No memory for allocating chip info structures\n"); | |
386 | return; | |
387 | } | |
388 | ||
e5580fbe | 389 | /* Fill out the chip array with {floor, chipno} for each |
1da177e4 LT |
390 | * detected chip in the device. */ |
391 | for (floor = 0, ret = 0; floor < MAX_FLOORS_MPLUS; floor++) { | |
392 | for (chip = 0 ; chip < numchips[floor] ; chip++) { | |
393 | this->chips[ret].floor = floor; | |
394 | this->chips[ret].chip = chip; | |
395 | this->chips[ret].curadr = 0; | |
396 | this->chips[ret].curmode = 0x50; | |
397 | ret++; | |
398 | } | |
399 | } | |
400 | ||
401 | /* Calculate and print the total size of the device */ | |
402 | this->totlen = this->numchips * (1 << this->chipshift); | |
403 | printk(KERN_INFO "%d flash chips found. Total DiskOnChip size: %ld MiB\n", | |
404 | this->numchips ,this->totlen >> 20); | |
405 | } | |
406 | ||
407 | static int DoCMilPlus_is_alias(struct DiskOnChip *doc1, struct DiskOnChip *doc2) | |
408 | { | |
409 | int tmp1, tmp2, retval; | |
410 | ||
411 | if (doc1->physadr == doc2->physadr) | |
412 | return 1; | |
413 | ||
414 | /* Use the alias resolution register which was set aside for this | |
415 | * purpose. If it's value is the same on both chips, they might | |
416 | * be the same chip, and we write to one and check for a change in | |
417 | * the other. It's unclear if this register is usuable in the | |
418 | * DoC 2000 (it's in the Millennium docs), but it seems to work. */ | |
419 | tmp1 = ReadDOC(doc1->virtadr, Mplus_AliasResolution); | |
420 | tmp2 = ReadDOC(doc2->virtadr, Mplus_AliasResolution); | |
421 | if (tmp1 != tmp2) | |
422 | return 0; | |
e5580fbe | 423 | |
1da177e4 LT |
424 | WriteDOC((tmp1+1) % 0xff, doc1->virtadr, Mplus_AliasResolution); |
425 | tmp2 = ReadDOC(doc2->virtadr, Mplus_AliasResolution); | |
426 | if (tmp2 == (tmp1+1) % 0xff) | |
427 | retval = 1; | |
428 | else | |
429 | retval = 0; | |
430 | ||
431 | /* Restore register contents. May not be necessary, but do it just to | |
432 | * be safe. */ | |
433 | WriteDOC(tmp1, doc1->virtadr, Mplus_AliasResolution); | |
434 | ||
435 | return retval; | |
436 | } | |
437 | ||
5e535429 DW |
438 | /* This routine is found from the docprobe code by symbol_get(), |
439 | * which will bump the use count of this module. */ | |
440 | void DoCMilPlus_init(struct mtd_info *mtd) | |
1da177e4 LT |
441 | { |
442 | struct DiskOnChip *this = mtd->priv; | |
443 | struct DiskOnChip *old = NULL; | |
444 | ||
445 | /* We must avoid being called twice for the same device. */ | |
446 | if (docmilpluslist) | |
447 | old = docmilpluslist->priv; | |
448 | ||
449 | while (old) { | |
450 | if (DoCMilPlus_is_alias(this, old)) { | |
451 | printk(KERN_NOTICE "Ignoring DiskOnChip Millennium " | |
452 | "Plus at 0x%lX - already configured\n", | |
453 | this->physadr); | |
454 | iounmap(this->virtadr); | |
455 | kfree(mtd); | |
456 | return; | |
457 | } | |
458 | if (old->nextdoc) | |
459 | old = old->nextdoc->priv; | |
460 | else | |
461 | old = NULL; | |
462 | } | |
463 | ||
464 | mtd->name = "DiskOnChip Millennium Plus"; | |
465 | printk(KERN_NOTICE "DiskOnChip Millennium Plus found at " | |
466 | "address 0x%lX\n", this->physadr); | |
467 | ||
468 | mtd->type = MTD_NANDFLASH; | |
469 | mtd->flags = MTD_CAP_NANDFLASH; | |
71f60fbe | 470 | mtd->writebufsize = mtd->writesize = 512; |
1da177e4 | 471 | mtd->oobsize = 16; |
6a918bad | 472 | mtd->ecc_strength = 2; |
1da177e4 | 473 | mtd->owner = THIS_MODULE; |
3c3c10bb AB |
474 | mtd->_erase = doc_erase; |
475 | mtd->_read = doc_read; | |
476 | mtd->_write = doc_write; | |
477 | mtd->_read_oob = doc_read_oob; | |
478 | mtd->_write_oob = doc_write_oob; | |
1da177e4 LT |
479 | this->curfloor = -1; |
480 | this->curchip = -1; | |
481 | ||
482 | /* Ident all the chips present. */ | |
483 | DoC_ScanChips(this); | |
484 | ||
485 | if (!this->totlen) { | |
486 | kfree(mtd); | |
487 | iounmap(this->virtadr); | |
488 | } else { | |
489 | this->nextdoc = docmilpluslist; | |
490 | docmilpluslist = mtd; | |
491 | mtd->size = this->totlen; | |
492 | mtd->erasesize = this->erasesize; | |
ee0e87b1 | 493 | mtd_device_register(mtd, NULL, 0); |
1da177e4 LT |
494 | return; |
495 | } | |
496 | } | |
b04ecae3 | 497 | EXPORT_SYMBOL_GPL(DoCMilPlus_init); |
1da177e4 LT |
498 | |
499 | #if 0 | |
500 | static int doc_dumpblk(struct mtd_info *mtd, loff_t from) | |
501 | { | |
502 | int i; | |
503 | loff_t fofs; | |
504 | struct DiskOnChip *this = mtd->priv; | |
505 | void __iomem * docptr = this->virtadr; | |
506 | struct Nand *mychip = &this->chips[from >> (this->chipshift)]; | |
507 | unsigned char *bp, buf[1056]; | |
508 | char c[32]; | |
509 | ||
510 | from &= ~0x3ff; | |
511 | ||
512 | /* Don't allow read past end of device */ | |
513 | if (from >= this->totlen) | |
514 | return -EINVAL; | |
515 | ||
516 | DoC_CheckASIC(docptr); | |
517 | ||
518 | /* Find the chip which is to be used and select it */ | |
519 | if (this->curfloor != mychip->floor) { | |
520 | DoC_SelectFloor(docptr, mychip->floor); | |
521 | DoC_SelectChip(docptr, mychip->chip); | |
522 | } else if (this->curchip != mychip->chip) { | |
523 | DoC_SelectChip(docptr, mychip->chip); | |
524 | } | |
525 | this->curfloor = mychip->floor; | |
526 | this->curchip = mychip->chip; | |
527 | ||
528 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
529 | WriteDOC((DOC_FLASH_CE | DOC_FLASH_WP), docptr, Mplus_FlashSelect); | |
530 | ||
531 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
532 | DoC_Command(docptr, NAND_CMD_RESET, 0); | |
533 | DoC_WaitReady(docptr); | |
534 | ||
535 | fofs = from; | |
536 | DoC_Command(docptr, DoC_GetDataOffset(mtd, &fofs), 0); | |
537 | DoC_Address(this, 3, fofs, 0, 0x00); | |
538 | WriteDOC(0, docptr, Mplus_FlashControl); | |
539 | DoC_WaitReady(docptr); | |
540 | ||
541 | /* disable the ECC engine */ | |
542 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
543 | ||
544 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
545 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
546 | ||
547 | /* Read the data via the internal pipeline through CDSN IO | |
548 | register, see Pipelined Read Operations 11.3 */ | |
549 | MemReadDOC(docptr, buf, 1054); | |
550 | buf[1054] = ReadDOC(docptr, Mplus_LastDataRead); | |
551 | buf[1055] = ReadDOC(docptr, Mplus_LastDataRead); | |
552 | ||
553 | memset(&c[0], 0, sizeof(c)); | |
554 | printk("DUMP OFFSET=%x:\n", (int)from); | |
555 | ||
556 | for (i = 0, bp = &buf[0]; (i < 1056); i++) { | |
557 | if ((i % 16) == 0) | |
558 | printk("%08x: ", i); | |
559 | printk(" %02x", *bp); | |
560 | c[(i & 0xf)] = ((*bp >= 0x20) && (*bp <= 0x7f)) ? *bp : '.'; | |
561 | bp++; | |
562 | if (((i + 1) % 16) == 0) | |
563 | printk(" %s\n", c); | |
564 | } | |
565 | printk("\n"); | |
566 | ||
567 | /* Disable flash internally */ | |
568 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
569 | ||
570 | return 0; | |
571 | } | |
572 | #endif | |
573 | ||
574 | static int doc_read(struct mtd_info *mtd, loff_t from, size_t len, | |
575 | size_t *retlen, u_char *buf) | |
1da177e4 LT |
576 | { |
577 | int ret, i; | |
578 | volatile char dummy; | |
579 | loff_t fofs; | |
7f8a8940 | 580 | unsigned char syndrome[6], eccbuf[6]; |
1da177e4 LT |
581 | struct DiskOnChip *this = mtd->priv; |
582 | void __iomem * docptr = this->virtadr; | |
583 | struct Nand *mychip = &this->chips[from >> (this->chipshift)]; | |
584 | ||
1da177e4 | 585 | /* Don't allow a single read to cross a 512-byte block boundary */ |
e5580fbe | 586 | if (from + len > ((from | 0x1ff) + 1)) |
1da177e4 LT |
587 | len = ((from | 0x1ff) + 1) - from; |
588 | ||
589 | DoC_CheckASIC(docptr); | |
590 | ||
591 | /* Find the chip which is to be used and select it */ | |
592 | if (this->curfloor != mychip->floor) { | |
593 | DoC_SelectFloor(docptr, mychip->floor); | |
594 | DoC_SelectChip(docptr, mychip->chip); | |
595 | } else if (this->curchip != mychip->chip) { | |
596 | DoC_SelectChip(docptr, mychip->chip); | |
597 | } | |
598 | this->curfloor = mychip->floor; | |
599 | this->curchip = mychip->chip; | |
600 | ||
601 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
602 | WriteDOC((DOC_FLASH_CE | DOC_FLASH_WP), docptr, Mplus_FlashSelect); | |
603 | ||
604 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
605 | DoC_Command(docptr, NAND_CMD_RESET, 0); | |
606 | DoC_WaitReady(docptr); | |
607 | ||
608 | fofs = from; | |
609 | DoC_Command(docptr, DoC_GetDataOffset(mtd, &fofs), 0); | |
610 | DoC_Address(this, 3, fofs, 0, 0x00); | |
611 | WriteDOC(0, docptr, Mplus_FlashControl); | |
612 | DoC_WaitReady(docptr); | |
613 | ||
7f8a8940 TG |
614 | /* init the ECC engine, see Reed-Solomon EDC/ECC 11.1 .*/ |
615 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
616 | WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf); | |
1da177e4 LT |
617 | |
618 | /* Let the caller know we completed it */ | |
619 | *retlen = len; | |
7f8a8940 | 620 | ret = 0; |
1da177e4 LT |
621 | |
622 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
623 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
624 | ||
7f8a8940 TG |
625 | /* Read the data via the internal pipeline through CDSN IO |
626 | register, see Pipelined Read Operations 11.3 */ | |
627 | MemReadDOC(docptr, buf, len); | |
1da177e4 | 628 | |
7f8a8940 TG |
629 | /* Read the ECC data following raw data */ |
630 | MemReadDOC(docptr, eccbuf, 4); | |
631 | eccbuf[4] = ReadDOC(docptr, Mplus_LastDataRead); | |
632 | eccbuf[5] = ReadDOC(docptr, Mplus_LastDataRead); | |
1da177e4 | 633 | |
7f8a8940 TG |
634 | /* Flush the pipeline */ |
635 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
636 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
1da177e4 | 637 | |
7f8a8940 TG |
638 | /* Check the ECC Status */ |
639 | if (ReadDOC(docptr, Mplus_ECCConf) & 0x80) { | |
640 | int nb_errors; | |
641 | /* There was an ECC error */ | |
1da177e4 | 642 | #ifdef ECC_DEBUG |
7f8a8940 | 643 | printk("DiskOnChip ECC Error: Read at %lx\n", (long)from); |
1da177e4 | 644 | #endif |
7854d3f7 | 645 | /* Read the ECC syndrome through the DiskOnChip ECC logic. |
7f8a8940 TG |
646 | These syndrome will be all ZERO when there is no error */ |
647 | for (i = 0; i < 6; i++) | |
648 | syndrome[i] = ReadDOC(docptr, Mplus_ECCSyndrome0 + i); | |
1da177e4 | 649 | |
7f8a8940 | 650 | nb_errors = doc_decode_ecc(buf, syndrome); |
1da177e4 | 651 | #ifdef ECC_DEBUG |
7f8a8940 | 652 | printk("ECC Errors corrected: %x\n", nb_errors); |
1da177e4 | 653 | #endif |
7f8a8940 TG |
654 | if (nb_errors < 0) { |
655 | /* We return error, but have actually done the | |
656 | read. Not that this can be told to user-space, via | |
657 | sys_read(), but at least MTD-aware stuff can know | |
658 | about it by checking *retlen */ | |
1da177e4 LT |
659 | #ifdef ECC_DEBUG |
660 | printk("%s(%d): Millennium Plus ECC error (from=0x%x:\n", | |
661 | __FILE__, __LINE__, (int)from); | |
13e85974 AS |
662 | printk(" syndrome= %*phC\n", 6, syndrome); |
663 | printk(" eccbuf= %*phC\n", 6, eccbuf); | |
1da177e4 LT |
664 | #endif |
665 | ret = -EIO; | |
1da177e4 | 666 | } |
7f8a8940 | 667 | } |
1da177e4 LT |
668 | |
669 | #ifdef PSYCHO_DEBUG | |
13e85974 | 670 | printk("ECC DATA at %lx: %*ph\n", (long)from, 6, eccbuf); |
1da177e4 | 671 | #endif |
7f8a8940 TG |
672 | /* disable the ECC engine */ |
673 | WriteDOC(DOC_ECC_DIS, docptr , Mplus_ECCConf); | |
1da177e4 LT |
674 | |
675 | /* Disable flash internally */ | |
676 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
677 | ||
678 | return ret; | |
679 | } | |
680 | ||
681 | static int doc_write(struct mtd_info *mtd, loff_t to, size_t len, | |
682 | size_t *retlen, const u_char *buf) | |
1da177e4 LT |
683 | { |
684 | int i, before, ret = 0; | |
685 | loff_t fto; | |
686 | volatile char dummy; | |
7f8a8940 | 687 | char eccbuf[6]; |
1da177e4 LT |
688 | struct DiskOnChip *this = mtd->priv; |
689 | void __iomem * docptr = this->virtadr; | |
690 | struct Nand *mychip = &this->chips[to >> (this->chipshift)]; | |
691 | ||
1da177e4 LT |
692 | /* Don't allow writes which aren't exactly one block (512 bytes) */ |
693 | if ((to & 0x1ff) || (len != 0x200)) | |
694 | return -EINVAL; | |
695 | ||
696 | /* Determine position of OOB flags, before or after data */ | |
697 | before = (this->interleave && (to & 0x200)); | |
698 | ||
699 | DoC_CheckASIC(docptr); | |
700 | ||
701 | /* Find the chip which is to be used and select it */ | |
702 | if (this->curfloor != mychip->floor) { | |
703 | DoC_SelectFloor(docptr, mychip->floor); | |
704 | DoC_SelectChip(docptr, mychip->chip); | |
705 | } else if (this->curchip != mychip->chip) { | |
706 | DoC_SelectChip(docptr, mychip->chip); | |
707 | } | |
708 | this->curfloor = mychip->floor; | |
709 | this->curchip = mychip->chip; | |
710 | ||
711 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
712 | WriteDOC(DOC_FLASH_CE, docptr, Mplus_FlashSelect); | |
713 | ||
714 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
715 | DoC_Command(docptr, NAND_CMD_RESET, 0); | |
716 | DoC_WaitReady(docptr); | |
717 | ||
718 | /* Set device to appropriate plane of flash */ | |
719 | fto = to; | |
720 | WriteDOC(DoC_GetDataOffset(mtd, &fto), docptr, Mplus_FlashCmd); | |
721 | ||
722 | /* On interleaved devices the flags for 2nd half 512 are before data */ | |
53fb84a0 | 723 | if (before) |
1da177e4 LT |
724 | fto -= 2; |
725 | ||
726 | /* issue the Serial Data In command to initial the Page Program process */ | |
727 | DoC_Command(docptr, NAND_CMD_SEQIN, 0x00); | |
728 | DoC_Address(this, 3, fto, 0x00, 0x00); | |
729 | ||
730 | /* Disable the ECC engine */ | |
731 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
732 | ||
7f8a8940 TG |
733 | if (before) { |
734 | /* Write the block status BLOCK_USED (0x5555) */ | |
735 | WriteDOC(0x55, docptr, Mil_CDSN_IO); | |
736 | WriteDOC(0x55, docptr, Mil_CDSN_IO); | |
1da177e4 LT |
737 | } |
738 | ||
7f8a8940 TG |
739 | /* init the ECC engine, see Reed-Solomon EDC/ECC 11.1 .*/ |
740 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf); | |
741 | ||
1da177e4 LT |
742 | MemWriteDOC(docptr, (unsigned char *) buf, len); |
743 | ||
7f8a8940 TG |
744 | /* Write ECC data to flash, the ECC info is generated by |
745 | the DiskOnChip ECC logic see Reed-Solomon EDC/ECC 11.1 */ | |
746 | DoC_Delay(docptr, 3); | |
1da177e4 | 747 | |
7f8a8940 TG |
748 | /* Read the ECC data through the DiskOnChip ECC logic */ |
749 | for (i = 0; i < 6; i++) | |
750 | eccbuf[i] = ReadDOC(docptr, Mplus_ECCSyndrome0 + i); | |
1da177e4 | 751 | |
7f8a8940 TG |
752 | /* disable the ECC engine */ |
753 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
1da177e4 | 754 | |
7f8a8940 TG |
755 | /* Write the ECC data to flash */ |
756 | MemWriteDOC(docptr, eccbuf, 6); | |
1da177e4 | 757 | |
7f8a8940 TG |
758 | if (!before) { |
759 | /* Write the block status BLOCK_USED (0x5555) */ | |
760 | WriteDOC(0x55, docptr, Mil_CDSN_IO+6); | |
761 | WriteDOC(0x55, docptr, Mil_CDSN_IO+7); | |
762 | } | |
1da177e4 LT |
763 | |
764 | #ifdef PSYCHO_DEBUG | |
7f8a8940 TG |
765 | printk("OOB data at %lx is %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", |
766 | (long) to, eccbuf[0], eccbuf[1], eccbuf[2], eccbuf[3], | |
767 | eccbuf[4], eccbuf[5]); | |
1da177e4 | 768 | #endif |
1da177e4 LT |
769 | |
770 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
771 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
772 | ||
773 | /* Commit the Page Program command and wait for ready | |
774 | see Software Requirement 11.4 item 1.*/ | |
775 | DoC_Command(docptr, NAND_CMD_PAGEPROG, 0x00); | |
776 | DoC_WaitReady(docptr); | |
777 | ||
778 | /* Read the status of the flash device through CDSN IO register | |
779 | see Software Requirement 11.4 item 5.*/ | |
780 | DoC_Command(docptr, NAND_CMD_STATUS, 0); | |
781 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
782 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
783 | DoC_Delay(docptr, 2); | |
784 | if ((dummy = ReadDOC(docptr, Mplus_LastDataRead)) & 1) { | |
785 | printk("MTD: Error 0x%x programming at 0x%x\n", dummy, (int)to); | |
786 | /* Error in programming | |
787 | FIXME: implement Bad Block Replacement (in nftl.c ??) */ | |
1da177e4 LT |
788 | ret = -EIO; |
789 | } | |
790 | dummy = ReadDOC(docptr, Mplus_LastDataRead); | |
791 | ||
792 | /* Disable flash internally */ | |
793 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
794 | ||
795 | /* Let the caller know we completed it */ | |
796 | *retlen = len; | |
797 | ||
798 | return ret; | |
799 | } | |
800 | ||
8593fbc6 TG |
801 | static int doc_read_oob(struct mtd_info *mtd, loff_t ofs, |
802 | struct mtd_oob_ops *ops) | |
1da177e4 LT |
803 | { |
804 | loff_t fofs, base; | |
805 | struct DiskOnChip *this = mtd->priv; | |
806 | void __iomem * docptr = this->virtadr; | |
807 | struct Nand *mychip = &this->chips[ofs >> this->chipshift]; | |
808 | size_t i, size, got, want; | |
8593fbc6 TG |
809 | uint8_t *buf = ops->oobbuf; |
810 | size_t len = ops->len; | |
811 | ||
0612b9dd | 812 | BUG_ON(ops->mode != MTD_OPS_PLACE_OOB); |
8593fbc6 TG |
813 | |
814 | ofs += ops->ooboffs; | |
1da177e4 LT |
815 | |
816 | DoC_CheckASIC(docptr); | |
817 | ||
818 | /* Find the chip which is to be used and select it */ | |
819 | if (this->curfloor != mychip->floor) { | |
820 | DoC_SelectFloor(docptr, mychip->floor); | |
821 | DoC_SelectChip(docptr, mychip->chip); | |
822 | } else if (this->curchip != mychip->chip) { | |
823 | DoC_SelectChip(docptr, mychip->chip); | |
824 | } | |
825 | this->curfloor = mychip->floor; | |
826 | this->curchip = mychip->chip; | |
827 | ||
828 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
829 | WriteDOC((DOC_FLASH_CE | DOC_FLASH_WP), docptr, Mplus_FlashSelect); | |
830 | ||
831 | /* disable the ECC engine */ | |
832 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
833 | DoC_WaitReady(docptr); | |
834 | ||
835 | /* Maximum of 16 bytes in the OOB region, so limit read to that */ | |
836 | if (len > 16) | |
837 | len = 16; | |
838 | got = 0; | |
839 | want = len; | |
840 | ||
841 | for (i = 0; ((i < 3) && (want > 0)); i++) { | |
842 | /* Figure out which region we are accessing... */ | |
843 | fofs = ofs; | |
844 | base = ofs & 0xf; | |
845 | if (!this->interleave) { | |
846 | DoC_Command(docptr, NAND_CMD_READOOB, 0); | |
847 | size = 16 - base; | |
848 | } else if (base < 6) { | |
849 | DoC_Command(docptr, DoC_GetECCOffset(mtd, &fofs), 0); | |
850 | size = 6 - base; | |
851 | } else if (base < 8) { | |
852 | DoC_Command(docptr, DoC_GetFlagsOffset(mtd, &fofs), 0); | |
853 | size = 8 - base; | |
854 | } else { | |
855 | DoC_Command(docptr, DoC_GetHdrOffset(mtd, &fofs), 0); | |
856 | size = 16 - base; | |
857 | } | |
858 | if (size > want) | |
859 | size = want; | |
860 | ||
861 | /* Issue read command */ | |
862 | DoC_Address(this, 3, fofs, 0, 0x00); | |
863 | WriteDOC(0, docptr, Mplus_FlashControl); | |
864 | DoC_WaitReady(docptr); | |
865 | ||
866 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
867 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
868 | MemReadDOC(docptr, &buf[got], size - 2); | |
869 | buf[got + size - 2] = ReadDOC(docptr, Mplus_LastDataRead); | |
870 | buf[got + size - 1] = ReadDOC(docptr, Mplus_LastDataRead); | |
871 | ||
872 | ofs += size; | |
873 | got += size; | |
874 | want -= size; | |
875 | } | |
876 | ||
877 | /* Disable flash internally */ | |
878 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
879 | ||
8593fbc6 | 880 | ops->retlen = len; |
1da177e4 LT |
881 | return 0; |
882 | } | |
883 | ||
8593fbc6 TG |
884 | static int doc_write_oob(struct mtd_info *mtd, loff_t ofs, |
885 | struct mtd_oob_ops *ops) | |
1da177e4 LT |
886 | { |
887 | volatile char dummy; | |
888 | loff_t fofs, base; | |
889 | struct DiskOnChip *this = mtd->priv; | |
890 | void __iomem * docptr = this->virtadr; | |
891 | struct Nand *mychip = &this->chips[ofs >> this->chipshift]; | |
892 | size_t i, size, got, want; | |
893 | int ret = 0; | |
8593fbc6 TG |
894 | uint8_t *buf = ops->oobbuf; |
895 | size_t len = ops->len; | |
896 | ||
0612b9dd | 897 | BUG_ON(ops->mode != MTD_OPS_PLACE_OOB); |
8593fbc6 TG |
898 | |
899 | ofs += ops->ooboffs; | |
1da177e4 LT |
900 | |
901 | DoC_CheckASIC(docptr); | |
902 | ||
903 | /* Find the chip which is to be used and select it */ | |
904 | if (this->curfloor != mychip->floor) { | |
905 | DoC_SelectFloor(docptr, mychip->floor); | |
906 | DoC_SelectChip(docptr, mychip->chip); | |
907 | } else if (this->curchip != mychip->chip) { | |
908 | DoC_SelectChip(docptr, mychip->chip); | |
909 | } | |
910 | this->curfloor = mychip->floor; | |
911 | this->curchip = mychip->chip; | |
912 | ||
913 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
914 | WriteDOC(DOC_FLASH_CE, docptr, Mplus_FlashSelect); | |
915 | ||
916 | ||
917 | /* Maximum of 16 bytes in the OOB region, so limit write to that */ | |
918 | if (len > 16) | |
919 | len = 16; | |
920 | got = 0; | |
921 | want = len; | |
922 | ||
923 | for (i = 0; ((i < 3) && (want > 0)); i++) { | |
924 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
925 | DoC_Command(docptr, NAND_CMD_RESET, 0); | |
926 | DoC_WaitReady(docptr); | |
927 | ||
928 | /* Figure out which region we are accessing... */ | |
929 | fofs = ofs; | |
930 | base = ofs & 0x0f; | |
931 | if (!this->interleave) { | |
932 | WriteDOC(NAND_CMD_READOOB, docptr, Mplus_FlashCmd); | |
933 | size = 16 - base; | |
934 | } else if (base < 6) { | |
935 | WriteDOC(DoC_GetECCOffset(mtd, &fofs), docptr, Mplus_FlashCmd); | |
936 | size = 6 - base; | |
937 | } else if (base < 8) { | |
938 | WriteDOC(DoC_GetFlagsOffset(mtd, &fofs), docptr, Mplus_FlashCmd); | |
939 | size = 8 - base; | |
940 | } else { | |
941 | WriteDOC(DoC_GetHdrOffset(mtd, &fofs), docptr, Mplus_FlashCmd); | |
942 | size = 16 - base; | |
943 | } | |
944 | if (size > want) | |
945 | size = want; | |
946 | ||
947 | /* Issue the Serial Data In command to initial the Page Program process */ | |
948 | DoC_Command(docptr, NAND_CMD_SEQIN, 0x00); | |
949 | DoC_Address(this, 3, fofs, 0, 0x00); | |
950 | ||
951 | /* Disable the ECC engine */ | |
952 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
953 | ||
954 | /* Write the data via the internal pipeline through CDSN IO | |
955 | register, see Pipelined Write Operations 11.2 */ | |
956 | MemWriteDOC(docptr, (unsigned char *) &buf[got], size); | |
957 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
958 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
959 | ||
960 | /* Commit the Page Program command and wait for ready | |
961 | see Software Requirement 11.4 item 1.*/ | |
962 | DoC_Command(docptr, NAND_CMD_PAGEPROG, 0x00); | |
963 | DoC_WaitReady(docptr); | |
964 | ||
965 | /* Read the status of the flash device through CDSN IO register | |
966 | see Software Requirement 11.4 item 5.*/ | |
967 | DoC_Command(docptr, NAND_CMD_STATUS, 0x00); | |
968 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
969 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
970 | DoC_Delay(docptr, 2); | |
971 | if ((dummy = ReadDOC(docptr, Mplus_LastDataRead)) & 1) { | |
972 | printk("MTD: Error 0x%x programming oob at 0x%x\n", | |
973 | dummy, (int)ofs); | |
974 | /* FIXME: implement Bad Block Replacement */ | |
8593fbc6 | 975 | ops->retlen = 0; |
1da177e4 LT |
976 | ret = -EIO; |
977 | } | |
978 | dummy = ReadDOC(docptr, Mplus_LastDataRead); | |
979 | ||
980 | ofs += size; | |
981 | got += size; | |
982 | want -= size; | |
983 | } | |
984 | ||
985 | /* Disable flash internally */ | |
986 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
987 | ||
8593fbc6 | 988 | ops->retlen = len; |
1da177e4 LT |
989 | return ret; |
990 | } | |
991 | ||
992 | int doc_erase(struct mtd_info *mtd, struct erase_info *instr) | |
993 | { | |
994 | volatile char dummy; | |
995 | struct DiskOnChip *this = mtd->priv; | |
996 | __u32 ofs = instr->addr; | |
997 | __u32 len = instr->len; | |
998 | void __iomem * docptr = this->virtadr; | |
999 | struct Nand *mychip = &this->chips[ofs >> this->chipshift]; | |
1000 | ||
1001 | DoC_CheckASIC(docptr); | |
1002 | ||
e5580fbe | 1003 | if (len != mtd->erasesize) |
1da177e4 LT |
1004 | printk(KERN_WARNING "MTD: Erase not right size (%x != %x)n", |
1005 | len, mtd->erasesize); | |
1006 | ||
1007 | /* Find the chip which is to be used and select it */ | |
1008 | if (this->curfloor != mychip->floor) { | |
1009 | DoC_SelectFloor(docptr, mychip->floor); | |
1010 | DoC_SelectChip(docptr, mychip->chip); | |
1011 | } else if (this->curchip != mychip->chip) { | |
1012 | DoC_SelectChip(docptr, mychip->chip); | |
1013 | } | |
1014 | this->curfloor = mychip->floor; | |
1015 | this->curchip = mychip->chip; | |
1016 | ||
1017 | instr->state = MTD_ERASE_PENDING; | |
1018 | ||
1019 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
1020 | WriteDOC(DOC_FLASH_CE, docptr, Mplus_FlashSelect); | |
1021 | ||
1022 | DoC_Command(docptr, NAND_CMD_RESET, 0x00); | |
1023 | DoC_WaitReady(docptr); | |
1024 | ||
1025 | DoC_Command(docptr, NAND_CMD_ERASE1, 0); | |
1026 | DoC_Address(this, 2, ofs, 0, 0x00); | |
1027 | DoC_Command(docptr, NAND_CMD_ERASE2, 0); | |
1028 | DoC_WaitReady(docptr); | |
1029 | instr->state = MTD_ERASING; | |
1030 | ||
1031 | /* Read the status of the flash device through CDSN IO register | |
1032 | see Software Requirement 11.4 item 5. */ | |
1033 | DoC_Command(docptr, NAND_CMD_STATUS, 0); | |
1034 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
1035 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
1036 | if ((dummy = ReadDOC(docptr, Mplus_LastDataRead)) & 1) { | |
1037 | printk("MTD: Error 0x%x erasing at 0x%x\n", dummy, ofs); | |
1038 | /* FIXME: implement Bad Block Replacement (in nftl.c ??) */ | |
1039 | instr->state = MTD_ERASE_FAILED; | |
1040 | } else { | |
1041 | instr->state = MTD_ERASE_DONE; | |
1042 | } | |
1043 | dummy = ReadDOC(docptr, Mplus_LastDataRead); | |
1044 | ||
1045 | /* Disable flash internally */ | |
1046 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
1047 | ||
1048 | mtd_erase_callback(instr); | |
1049 | ||
1050 | return 0; | |
1051 | } | |
1052 | ||
1053 | /**************************************************************************** | |
1054 | * | |
1055 | * Module stuff | |
1056 | * | |
1057 | ****************************************************************************/ | |
1058 | ||
1da177e4 LT |
1059 | static void __exit cleanup_doc2001plus(void) |
1060 | { | |
1061 | struct mtd_info *mtd; | |
1062 | struct DiskOnChip *this; | |
1063 | ||
1064 | while ((mtd=docmilpluslist)) { | |
1065 | this = mtd->priv; | |
1066 | docmilpluslist = this->nextdoc; | |
e5580fbe | 1067 | |
ee0e87b1 | 1068 | mtd_device_unregister(mtd); |
e5580fbe | 1069 | |
1da177e4 LT |
1070 | iounmap(this->virtadr); |
1071 | kfree(this->chips); | |
1072 | kfree(mtd); | |
1073 | } | |
1da177e4 LT |
1074 | } |
1075 | ||
1076 | module_exit(cleanup_doc2001plus); | |
1da177e4 LT |
1077 | |
1078 | MODULE_LICENSE("GPL"); | |
1079 | MODULE_AUTHOR("Greg Ungerer <gerg@snapgear.com> et al."); | |
1080 | MODULE_DESCRIPTION("Driver for DiskOnChip Millennium Plus"); |