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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 | ||
64 | DEBUG(MTD_DEBUG_LEVEL3, | |
65 | "_DoC_WaitReady called for out-of-line wait\n"); | |
66 | ||
67 | /* Out-of-line routine to wait for chip response */ | |
68 | while (((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) && --c) | |
69 | ; | |
70 | ||
71 | if (c == 0) | |
72 | DEBUG(MTD_DEBUG_LEVEL2, "_DoC_WaitReady timed out.\n"); | |
73 | ||
74 | return (c == 0); | |
75 | } | |
76 | ||
77 | static inline int DoC_WaitReady(void __iomem * docptr) | |
78 | { | |
79 | /* This is inline, to optimise the common case, where it's ready instantly */ | |
80 | int ret = 0; | |
81 | ||
82 | /* read form NOP register should be issued prior to the read from CDSNControl | |
83 | see Software Requirement 11.4 item 2. */ | |
84 | DoC_Delay(docptr, 4); | |
85 | ||
86 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) | |
87 | /* Call the out-of-line routine to wait */ | |
88 | ret = _DoC_WaitReady(docptr); | |
89 | ||
90 | return ret; | |
91 | } | |
92 | ||
25985edc | 93 | /* For some reason the Millennium Plus seems to occasionally put itself |
1da177e4 LT |
94 | * into reset mode. For me this happens randomly, with no pattern that I |
95 | * can detect. M-systems suggest always check this on any block level | |
96 | * operation and setting to normal mode if in reset mode. | |
97 | */ | |
98 | static inline void DoC_CheckASIC(void __iomem * docptr) | |
99 | { | |
100 | /* Make sure the DoC is in normal mode */ | |
101 | if ((ReadDOC(docptr, Mplus_DOCControl) & DOC_MODE_NORMAL) == 0) { | |
102 | WriteDOC((DOC_MODE_NORMAL | DOC_MODE_MDWREN), docptr, Mplus_DOCControl); | |
103 | WriteDOC(~(DOC_MODE_NORMAL | DOC_MODE_MDWREN), docptr, Mplus_CtrlConfirm); | |
104 | } | |
105 | } | |
106 | ||
107 | /* DoC_Command: Send a flash command to the flash chip through the Flash | |
108 | * command register. Need 2 Write Pipeline Terminates to complete send. | |
109 | */ | |
858119e1 | 110 | static void DoC_Command(void __iomem * docptr, unsigned char command, |
1da177e4 LT |
111 | unsigned char xtraflags) |
112 | { | |
113 | WriteDOC(command, docptr, Mplus_FlashCmd); | |
114 | WriteDOC(command, docptr, Mplus_WritePipeTerm); | |
115 | WriteDOC(command, docptr, Mplus_WritePipeTerm); | |
116 | } | |
117 | ||
118 | /* DoC_Address: Set the current address for the flash chip through the Flash | |
119 | * Address register. Need 2 Write Pipeline Terminates to complete send. | |
120 | */ | |
121 | static inline void DoC_Address(struct DiskOnChip *doc, int numbytes, | |
122 | unsigned long ofs, unsigned char xtraflags1, | |
123 | unsigned char xtraflags2) | |
124 | { | |
125 | void __iomem * docptr = doc->virtadr; | |
126 | ||
127 | /* Allow for possible Mill Plus internal flash interleaving */ | |
128 | ofs >>= doc->interleave; | |
129 | ||
130 | switch (numbytes) { | |
131 | case 1: | |
132 | /* Send single byte, bits 0-7. */ | |
133 | WriteDOC(ofs & 0xff, docptr, Mplus_FlashAddress); | |
134 | break; | |
135 | case 2: | |
136 | /* Send bits 9-16 followed by 17-23 */ | |
137 | WriteDOC((ofs >> 9) & 0xff, docptr, Mplus_FlashAddress); | |
138 | WriteDOC((ofs >> 17) & 0xff, docptr, Mplus_FlashAddress); | |
139 | break; | |
140 | case 3: | |
141 | /* Send 0-7, 9-16, then 17-23 */ | |
142 | WriteDOC(ofs & 0xff, docptr, Mplus_FlashAddress); | |
143 | WriteDOC((ofs >> 9) & 0xff, docptr, Mplus_FlashAddress); | |
144 | WriteDOC((ofs >> 17) & 0xff, docptr, Mplus_FlashAddress); | |
145 | break; | |
146 | default: | |
147 | return; | |
148 | } | |
149 | ||
150 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
151 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
152 | } | |
153 | ||
154 | /* DoC_SelectChip: Select a given flash chip within the current floor */ | |
155 | static int DoC_SelectChip(void __iomem * docptr, int chip) | |
156 | { | |
157 | /* No choice for flash chip on Millennium Plus */ | |
158 | return 0; | |
159 | } | |
160 | ||
161 | /* DoC_SelectFloor: Select a given floor (bank of flash chips) */ | |
162 | static int DoC_SelectFloor(void __iomem * docptr, int floor) | |
163 | { | |
164 | WriteDOC((floor & 0x3), docptr, Mplus_DeviceSelect); | |
165 | return 0; | |
166 | } | |
167 | ||
168 | /* | |
169 | * Translate the given offset into the appropriate command and offset. | |
170 | * This does the mapping using the 16bit interleave layout defined by | |
171 | * M-Systems, and looks like this for a sector pair: | |
172 | * +-----------+-------+-------+-------+--------------+---------+-----------+ | |
173 | * | 0 --- 511 |512-517|518-519|520-521| 522 --- 1033 |1034-1039|1040 - 1055| | |
174 | * +-----------+-------+-------+-------+--------------+---------+-----------+ | |
175 | * | Data 0 | ECC 0 |Flags0 |Flags1 | Data 1 |ECC 1 | OOB 1 + 2 | | |
176 | * +-----------+-------+-------+-------+--------------+---------+-----------+ | |
177 | */ | |
178 | /* FIXME: This lives in INFTL not here. Other users of flash devices | |
179 | may not want it */ | |
180 | static unsigned int DoC_GetDataOffset(struct mtd_info *mtd, loff_t *from) | |
181 | { | |
182 | struct DiskOnChip *this = mtd->priv; | |
183 | ||
184 | if (this->interleave) { | |
185 | unsigned int ofs = *from & 0x3ff; | |
186 | unsigned int cmd; | |
187 | ||
188 | if (ofs < 512) { | |
189 | cmd = NAND_CMD_READ0; | |
190 | ofs &= 0x1ff; | |
191 | } else if (ofs < 1014) { | |
192 | cmd = NAND_CMD_READ1; | |
193 | ofs = (ofs & 0x1ff) + 10; | |
194 | } else { | |
195 | cmd = NAND_CMD_READOOB; | |
196 | ofs = ofs - 1014; | |
197 | } | |
198 | ||
199 | *from = (*from & ~0x3ff) | ofs; | |
200 | return cmd; | |
201 | } else { | |
202 | /* No interleave */ | |
203 | if ((*from) & 0x100) | |
204 | return NAND_CMD_READ1; | |
205 | return NAND_CMD_READ0; | |
206 | } | |
207 | } | |
208 | ||
209 | static unsigned int DoC_GetECCOffset(struct mtd_info *mtd, loff_t *from) | |
210 | { | |
211 | unsigned int ofs, cmd; | |
212 | ||
213 | if (*from & 0x200) { | |
214 | cmd = NAND_CMD_READOOB; | |
215 | ofs = 10 + (*from & 0xf); | |
216 | } else { | |
217 | cmd = NAND_CMD_READ1; | |
218 | ofs = (*from & 0xf); | |
219 | } | |
220 | ||
221 | *from = (*from & ~0x3ff) | ofs; | |
222 | return cmd; | |
223 | } | |
224 | ||
225 | static unsigned int DoC_GetFlagsOffset(struct mtd_info *mtd, loff_t *from) | |
226 | { | |
227 | unsigned int ofs, cmd; | |
228 | ||
229 | cmd = NAND_CMD_READ1; | |
230 | ofs = (*from & 0x200) ? 8 : 6; | |
231 | *from = (*from & ~0x3ff) | ofs; | |
232 | return cmd; | |
233 | } | |
234 | ||
235 | static unsigned int DoC_GetHdrOffset(struct mtd_info *mtd, loff_t *from) | |
236 | { | |
237 | unsigned int ofs, cmd; | |
238 | ||
239 | cmd = NAND_CMD_READOOB; | |
240 | ofs = (*from & 0x200) ? 24 : 16; | |
241 | *from = (*from & ~0x3ff) | ofs; | |
242 | return cmd; | |
243 | } | |
244 | ||
245 | static inline void MemReadDOC(void __iomem * docptr, unsigned char *buf, int len) | |
246 | { | |
247 | #ifndef USE_MEMCPY | |
248 | int i; | |
249 | for (i = 0; i < len; i++) | |
250 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO + i); | |
251 | #else | |
252 | memcpy_fromio(buf, docptr + DoC_Mil_CDSN_IO, len); | |
253 | #endif | |
254 | } | |
255 | ||
256 | static inline void MemWriteDOC(void __iomem * docptr, unsigned char *buf, int len) | |
257 | { | |
258 | #ifndef USE_MEMCPY | |
259 | int i; | |
260 | for (i = 0; i < len; i++) | |
261 | WriteDOC(buf[i], docptr, Mil_CDSN_IO + i); | |
262 | #else | |
263 | memcpy_toio(docptr + DoC_Mil_CDSN_IO, buf, len); | |
264 | #endif | |
265 | } | |
266 | ||
267 | /* DoC_IdentChip: Identify a given NAND chip given {floor,chip} */ | |
268 | static int DoC_IdentChip(struct DiskOnChip *doc, int floor, int chip) | |
269 | { | |
270 | int mfr, id, i, j; | |
271 | volatile char dummy; | |
272 | void __iomem * docptr = doc->virtadr; | |
273 | ||
274 | /* Page in the required floor/chip */ | |
275 | DoC_SelectFloor(docptr, floor); | |
276 | DoC_SelectChip(docptr, chip); | |
277 | ||
278 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
279 | WriteDOC((DOC_FLASH_CE | DOC_FLASH_WP), docptr, Mplus_FlashSelect); | |
280 | ||
281 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
282 | DoC_Command(docptr, NAND_CMD_RESET, 0); | |
283 | DoC_WaitReady(docptr); | |
284 | ||
e5580fbe | 285 | /* Read the NAND chip ID: 1. Send ReadID command */ |
1da177e4 LT |
286 | DoC_Command(docptr, NAND_CMD_READID, 0); |
287 | ||
e5580fbe | 288 | /* Read the NAND chip ID: 2. Send address byte zero */ |
1da177e4 LT |
289 | DoC_Address(doc, 1, 0x00, 0, 0x00); |
290 | ||
291 | WriteDOC(0, docptr, Mplus_FlashControl); | |
292 | DoC_WaitReady(docptr); | |
293 | ||
294 | /* Read the manufacturer and device id codes of the flash device through | |
295 | CDSN IO register see Software Requirement 11.4 item 5.*/ | |
296 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
297 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
298 | ||
299 | mfr = ReadDOC(docptr, Mil_CDSN_IO); | |
300 | if (doc->interleave) | |
301 | dummy = ReadDOC(docptr, Mil_CDSN_IO); /* 2 way interleave */ | |
302 | ||
303 | id = ReadDOC(docptr, Mil_CDSN_IO); | |
304 | if (doc->interleave) | |
305 | dummy = ReadDOC(docptr, Mil_CDSN_IO); /* 2 way interleave */ | |
306 | ||
307 | dummy = ReadDOC(docptr, Mplus_LastDataRead); | |
308 | dummy = ReadDOC(docptr, Mplus_LastDataRead); | |
309 | ||
310 | /* Disable flash internally */ | |
311 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
312 | ||
313 | /* No response - return failure */ | |
314 | if (mfr == 0xff || mfr == 0) | |
315 | return 0; | |
316 | ||
317 | for (i = 0; nand_flash_ids[i].name != NULL; i++) { | |
318 | if (id == nand_flash_ids[i].id) { | |
319 | /* Try to identify manufacturer */ | |
320 | for (j = 0; nand_manuf_ids[j].id != 0x0; j++) { | |
321 | if (nand_manuf_ids[j].id == mfr) | |
322 | break; | |
323 | } | |
324 | printk(KERN_INFO "Flash chip found: Manufacturer ID: %2.2X, " | |
325 | "Chip ID: %2.2X (%s:%s)\n", mfr, id, | |
326 | nand_manuf_ids[j].name, nand_flash_ids[i].name); | |
327 | doc->mfr = mfr; | |
328 | doc->id = id; | |
329 | doc->chipshift = ffs((nand_flash_ids[i].chipsize << 20)) - 1; | |
330 | doc->erasesize = nand_flash_ids[i].erasesize << doc->interleave; | |
331 | break; | |
332 | } | |
333 | } | |
334 | ||
335 | if (nand_flash_ids[i].name == NULL) | |
336 | return 0; | |
337 | return 1; | |
338 | } | |
339 | ||
340 | /* DoC_ScanChips: Find all NAND chips present in a DiskOnChip, and identify them */ | |
341 | static void DoC_ScanChips(struct DiskOnChip *this) | |
342 | { | |
343 | int floor, chip; | |
344 | int numchips[MAX_FLOORS_MPLUS]; | |
345 | int ret; | |
346 | ||
347 | this->numchips = 0; | |
348 | this->mfr = 0; | |
349 | this->id = 0; | |
350 | ||
351 | /* Work out the intended interleave setting */ | |
352 | this->interleave = 0; | |
353 | if (this->ChipID == DOC_ChipID_DocMilPlus32) | |
354 | this->interleave = 1; | |
355 | ||
356 | /* Check the ASIC agrees */ | |
e5580fbe | 357 | if ( (this->interleave << 2) != |
1da177e4 LT |
358 | (ReadDOC(this->virtadr, Mplus_Configuration) & 4)) { |
359 | u_char conf = ReadDOC(this->virtadr, Mplus_Configuration); | |
360 | printk(KERN_NOTICE "Setting DiskOnChip Millennium Plus interleave to %s\n", | |
361 | this->interleave?"on (16-bit)":"off (8-bit)"); | |
362 | conf ^= 4; | |
363 | WriteDOC(conf, this->virtadr, Mplus_Configuration); | |
364 | } | |
365 | ||
366 | /* For each floor, find the number of valid chips it contains */ | |
367 | for (floor = 0,ret = 1; floor < MAX_FLOORS_MPLUS; floor++) { | |
368 | numchips[floor] = 0; | |
369 | for (chip = 0; chip < MAX_CHIPS_MPLUS && ret != 0; chip++) { | |
370 | ret = DoC_IdentChip(this, floor, chip); | |
371 | if (ret) { | |
372 | numchips[floor]++; | |
373 | this->numchips++; | |
374 | } | |
375 | } | |
376 | } | |
377 | /* If there are none at all that we recognise, bail */ | |
378 | if (!this->numchips) { | |
379 | printk("No flash chips recognised.\n"); | |
380 | return; | |
381 | } | |
382 | ||
383 | /* Allocate an array to hold the information for each chip */ | |
384 | this->chips = kmalloc(sizeof(struct Nand) * this->numchips, GFP_KERNEL); | |
385 | if (!this->chips){ | |
386 | printk("MTD: No memory for allocating chip info structures\n"); | |
387 | return; | |
388 | } | |
389 | ||
e5580fbe | 390 | /* Fill out the chip array with {floor, chipno} for each |
1da177e4 LT |
391 | * detected chip in the device. */ |
392 | for (floor = 0, ret = 0; floor < MAX_FLOORS_MPLUS; floor++) { | |
393 | for (chip = 0 ; chip < numchips[floor] ; chip++) { | |
394 | this->chips[ret].floor = floor; | |
395 | this->chips[ret].chip = chip; | |
396 | this->chips[ret].curadr = 0; | |
397 | this->chips[ret].curmode = 0x50; | |
398 | ret++; | |
399 | } | |
400 | } | |
401 | ||
402 | /* Calculate and print the total size of the device */ | |
403 | this->totlen = this->numchips * (1 << this->chipshift); | |
404 | printk(KERN_INFO "%d flash chips found. Total DiskOnChip size: %ld MiB\n", | |
405 | this->numchips ,this->totlen >> 20); | |
406 | } | |
407 | ||
408 | static int DoCMilPlus_is_alias(struct DiskOnChip *doc1, struct DiskOnChip *doc2) | |
409 | { | |
410 | int tmp1, tmp2, retval; | |
411 | ||
412 | if (doc1->physadr == doc2->physadr) | |
413 | return 1; | |
414 | ||
415 | /* Use the alias resolution register which was set aside for this | |
416 | * purpose. If it's value is the same on both chips, they might | |
417 | * be the same chip, and we write to one and check for a change in | |
418 | * the other. It's unclear if this register is usuable in the | |
419 | * DoC 2000 (it's in the Millennium docs), but it seems to work. */ | |
420 | tmp1 = ReadDOC(doc1->virtadr, Mplus_AliasResolution); | |
421 | tmp2 = ReadDOC(doc2->virtadr, Mplus_AliasResolution); | |
422 | if (tmp1 != tmp2) | |
423 | return 0; | |
e5580fbe | 424 | |
1da177e4 LT |
425 | WriteDOC((tmp1+1) % 0xff, doc1->virtadr, Mplus_AliasResolution); |
426 | tmp2 = ReadDOC(doc2->virtadr, Mplus_AliasResolution); | |
427 | if (tmp2 == (tmp1+1) % 0xff) | |
428 | retval = 1; | |
429 | else | |
430 | retval = 0; | |
431 | ||
432 | /* Restore register contents. May not be necessary, but do it just to | |
433 | * be safe. */ | |
434 | WriteDOC(tmp1, doc1->virtadr, Mplus_AliasResolution); | |
435 | ||
436 | return retval; | |
437 | } | |
438 | ||
5e535429 DW |
439 | /* This routine is found from the docprobe code by symbol_get(), |
440 | * which will bump the use count of this module. */ | |
441 | void DoCMilPlus_init(struct mtd_info *mtd) | |
1da177e4 LT |
442 | { |
443 | struct DiskOnChip *this = mtd->priv; | |
444 | struct DiskOnChip *old = NULL; | |
445 | ||
446 | /* We must avoid being called twice for the same device. */ | |
447 | if (docmilpluslist) | |
448 | old = docmilpluslist->priv; | |
449 | ||
450 | while (old) { | |
451 | if (DoCMilPlus_is_alias(this, old)) { | |
452 | printk(KERN_NOTICE "Ignoring DiskOnChip Millennium " | |
453 | "Plus at 0x%lX - already configured\n", | |
454 | this->physadr); | |
455 | iounmap(this->virtadr); | |
456 | kfree(mtd); | |
457 | return; | |
458 | } | |
459 | if (old->nextdoc) | |
460 | old = old->nextdoc->priv; | |
461 | else | |
462 | old = NULL; | |
463 | } | |
464 | ||
465 | mtd->name = "DiskOnChip Millennium Plus"; | |
466 | printk(KERN_NOTICE "DiskOnChip Millennium Plus found at " | |
467 | "address 0x%lX\n", this->physadr); | |
468 | ||
469 | mtd->type = MTD_NANDFLASH; | |
470 | mtd->flags = MTD_CAP_NANDFLASH; | |
1da177e4 LT |
471 | mtd->size = 0; |
472 | ||
473 | mtd->erasesize = 0; | |
28318776 | 474 | mtd->writesize = 512; |
1da177e4 LT |
475 | mtd->oobsize = 16; |
476 | mtd->owner = THIS_MODULE; | |
477 | mtd->erase = doc_erase; | |
478 | mtd->point = NULL; | |
479 | mtd->unpoint = NULL; | |
480 | mtd->read = doc_read; | |
481 | mtd->write = doc_write; | |
1da177e4 LT |
482 | mtd->read_oob = doc_read_oob; |
483 | mtd->write_oob = doc_write_oob; | |
484 | mtd->sync = NULL; | |
485 | ||
486 | this->totlen = 0; | |
487 | this->numchips = 0; | |
488 | this->curfloor = -1; | |
489 | this->curchip = -1; | |
490 | ||
491 | /* Ident all the chips present. */ | |
492 | DoC_ScanChips(this); | |
493 | ||
494 | if (!this->totlen) { | |
495 | kfree(mtd); | |
496 | iounmap(this->virtadr); | |
497 | } else { | |
498 | this->nextdoc = docmilpluslist; | |
499 | docmilpluslist = mtd; | |
500 | mtd->size = this->totlen; | |
501 | mtd->erasesize = this->erasesize; | |
502 | add_mtd_device(mtd); | |
503 | return; | |
504 | } | |
505 | } | |
b04ecae3 | 506 | EXPORT_SYMBOL_GPL(DoCMilPlus_init); |
1da177e4 LT |
507 | |
508 | #if 0 | |
509 | static int doc_dumpblk(struct mtd_info *mtd, loff_t from) | |
510 | { | |
511 | int i; | |
512 | loff_t fofs; | |
513 | struct DiskOnChip *this = mtd->priv; | |
514 | void __iomem * docptr = this->virtadr; | |
515 | struct Nand *mychip = &this->chips[from >> (this->chipshift)]; | |
516 | unsigned char *bp, buf[1056]; | |
517 | char c[32]; | |
518 | ||
519 | from &= ~0x3ff; | |
520 | ||
521 | /* Don't allow read past end of device */ | |
522 | if (from >= this->totlen) | |
523 | return -EINVAL; | |
524 | ||
525 | DoC_CheckASIC(docptr); | |
526 | ||
527 | /* Find the chip which is to be used and select it */ | |
528 | if (this->curfloor != mychip->floor) { | |
529 | DoC_SelectFloor(docptr, mychip->floor); | |
530 | DoC_SelectChip(docptr, mychip->chip); | |
531 | } else if (this->curchip != mychip->chip) { | |
532 | DoC_SelectChip(docptr, mychip->chip); | |
533 | } | |
534 | this->curfloor = mychip->floor; | |
535 | this->curchip = mychip->chip; | |
536 | ||
537 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
538 | WriteDOC((DOC_FLASH_CE | DOC_FLASH_WP), docptr, Mplus_FlashSelect); | |
539 | ||
540 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
541 | DoC_Command(docptr, NAND_CMD_RESET, 0); | |
542 | DoC_WaitReady(docptr); | |
543 | ||
544 | fofs = from; | |
545 | DoC_Command(docptr, DoC_GetDataOffset(mtd, &fofs), 0); | |
546 | DoC_Address(this, 3, fofs, 0, 0x00); | |
547 | WriteDOC(0, docptr, Mplus_FlashControl); | |
548 | DoC_WaitReady(docptr); | |
549 | ||
550 | /* disable the ECC engine */ | |
551 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
552 | ||
553 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
554 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
555 | ||
556 | /* Read the data via the internal pipeline through CDSN IO | |
557 | register, see Pipelined Read Operations 11.3 */ | |
558 | MemReadDOC(docptr, buf, 1054); | |
559 | buf[1054] = ReadDOC(docptr, Mplus_LastDataRead); | |
560 | buf[1055] = ReadDOC(docptr, Mplus_LastDataRead); | |
561 | ||
562 | memset(&c[0], 0, sizeof(c)); | |
563 | printk("DUMP OFFSET=%x:\n", (int)from); | |
564 | ||
565 | for (i = 0, bp = &buf[0]; (i < 1056); i++) { | |
566 | if ((i % 16) == 0) | |
567 | printk("%08x: ", i); | |
568 | printk(" %02x", *bp); | |
569 | c[(i & 0xf)] = ((*bp >= 0x20) && (*bp <= 0x7f)) ? *bp : '.'; | |
570 | bp++; | |
571 | if (((i + 1) % 16) == 0) | |
572 | printk(" %s\n", c); | |
573 | } | |
574 | printk("\n"); | |
575 | ||
576 | /* Disable flash internally */ | |
577 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
578 | ||
579 | return 0; | |
580 | } | |
581 | #endif | |
582 | ||
583 | static int doc_read(struct mtd_info *mtd, loff_t from, size_t len, | |
584 | size_t *retlen, u_char *buf) | |
1da177e4 LT |
585 | { |
586 | int ret, i; | |
587 | volatile char dummy; | |
588 | loff_t fofs; | |
7f8a8940 | 589 | unsigned char syndrome[6], eccbuf[6]; |
1da177e4 LT |
590 | struct DiskOnChip *this = mtd->priv; |
591 | void __iomem * docptr = this->virtadr; | |
592 | struct Nand *mychip = &this->chips[from >> (this->chipshift)]; | |
593 | ||
594 | /* Don't allow read past end of device */ | |
595 | if (from >= this->totlen) | |
596 | return -EINVAL; | |
597 | ||
598 | /* Don't allow a single read to cross a 512-byte block boundary */ | |
e5580fbe | 599 | if (from + len > ((from | 0x1ff) + 1)) |
1da177e4 LT |
600 | len = ((from | 0x1ff) + 1) - from; |
601 | ||
602 | DoC_CheckASIC(docptr); | |
603 | ||
604 | /* Find the chip which is to be used and select it */ | |
605 | if (this->curfloor != mychip->floor) { | |
606 | DoC_SelectFloor(docptr, mychip->floor); | |
607 | DoC_SelectChip(docptr, mychip->chip); | |
608 | } else if (this->curchip != mychip->chip) { | |
609 | DoC_SelectChip(docptr, mychip->chip); | |
610 | } | |
611 | this->curfloor = mychip->floor; | |
612 | this->curchip = mychip->chip; | |
613 | ||
614 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
615 | WriteDOC((DOC_FLASH_CE | DOC_FLASH_WP), docptr, Mplus_FlashSelect); | |
616 | ||
617 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
618 | DoC_Command(docptr, NAND_CMD_RESET, 0); | |
619 | DoC_WaitReady(docptr); | |
620 | ||
621 | fofs = from; | |
622 | DoC_Command(docptr, DoC_GetDataOffset(mtd, &fofs), 0); | |
623 | DoC_Address(this, 3, fofs, 0, 0x00); | |
624 | WriteDOC(0, docptr, Mplus_FlashControl); | |
625 | DoC_WaitReady(docptr); | |
626 | ||
7f8a8940 TG |
627 | /* init the ECC engine, see Reed-Solomon EDC/ECC 11.1 .*/ |
628 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
629 | WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf); | |
1da177e4 LT |
630 | |
631 | /* Let the caller know we completed it */ | |
632 | *retlen = len; | |
7f8a8940 | 633 | ret = 0; |
1da177e4 LT |
634 | |
635 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
636 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
637 | ||
7f8a8940 TG |
638 | /* Read the data via the internal pipeline through CDSN IO |
639 | register, see Pipelined Read Operations 11.3 */ | |
640 | MemReadDOC(docptr, buf, len); | |
1da177e4 | 641 | |
7f8a8940 TG |
642 | /* Read the ECC data following raw data */ |
643 | MemReadDOC(docptr, eccbuf, 4); | |
644 | eccbuf[4] = ReadDOC(docptr, Mplus_LastDataRead); | |
645 | eccbuf[5] = ReadDOC(docptr, Mplus_LastDataRead); | |
1da177e4 | 646 | |
7f8a8940 TG |
647 | /* Flush the pipeline */ |
648 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
649 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
1da177e4 | 650 | |
7f8a8940 TG |
651 | /* Check the ECC Status */ |
652 | if (ReadDOC(docptr, Mplus_ECCConf) & 0x80) { | |
653 | int nb_errors; | |
654 | /* There was an ECC error */ | |
1da177e4 | 655 | #ifdef ECC_DEBUG |
7f8a8940 | 656 | printk("DiskOnChip ECC Error: Read at %lx\n", (long)from); |
1da177e4 | 657 | #endif |
7f8a8940 TG |
658 | /* Read the ECC syndrom through the DiskOnChip ECC logic. |
659 | These syndrome will be all ZERO when there is no error */ | |
660 | for (i = 0; i < 6; i++) | |
661 | syndrome[i] = ReadDOC(docptr, Mplus_ECCSyndrome0 + i); | |
1da177e4 | 662 | |
7f8a8940 | 663 | nb_errors = doc_decode_ecc(buf, syndrome); |
1da177e4 | 664 | #ifdef ECC_DEBUG |
7f8a8940 | 665 | printk("ECC Errors corrected: %x\n", nb_errors); |
1da177e4 | 666 | #endif |
7f8a8940 TG |
667 | if (nb_errors < 0) { |
668 | /* We return error, but have actually done the | |
669 | read. Not that this can be told to user-space, via | |
670 | sys_read(), but at least MTD-aware stuff can know | |
671 | about it by checking *retlen */ | |
1da177e4 LT |
672 | #ifdef ECC_DEBUG |
673 | printk("%s(%d): Millennium Plus ECC error (from=0x%x:\n", | |
674 | __FILE__, __LINE__, (int)from); | |
675 | printk(" syndrome= %02x:%02x:%02x:%02x:%02x:" | |
676 | "%02x\n", | |
677 | syndrome[0], syndrome[1], syndrome[2], | |
678 | syndrome[3], syndrome[4], syndrome[5]); | |
679 | printk(" eccbuf= %02x:%02x:%02x:%02x:%02x:" | |
680 | "%02x\n", | |
681 | eccbuf[0], eccbuf[1], eccbuf[2], | |
682 | eccbuf[3], eccbuf[4], eccbuf[5]); | |
683 | #endif | |
684 | ret = -EIO; | |
1da177e4 | 685 | } |
7f8a8940 | 686 | } |
1da177e4 LT |
687 | |
688 | #ifdef PSYCHO_DEBUG | |
7f8a8940 TG |
689 | printk("ECC DATA at %lx: %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", |
690 | (long)from, eccbuf[0], eccbuf[1], eccbuf[2], eccbuf[3], | |
691 | eccbuf[4], eccbuf[5]); | |
1da177e4 | 692 | #endif |
7f8a8940 TG |
693 | /* disable the ECC engine */ |
694 | WriteDOC(DOC_ECC_DIS, docptr , Mplus_ECCConf); | |
1da177e4 LT |
695 | |
696 | /* Disable flash internally */ | |
697 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
698 | ||
699 | return ret; | |
700 | } | |
701 | ||
702 | static int doc_write(struct mtd_info *mtd, loff_t to, size_t len, | |
703 | size_t *retlen, const u_char *buf) | |
1da177e4 LT |
704 | { |
705 | int i, before, ret = 0; | |
706 | loff_t fto; | |
707 | volatile char dummy; | |
7f8a8940 | 708 | char eccbuf[6]; |
1da177e4 LT |
709 | struct DiskOnChip *this = mtd->priv; |
710 | void __iomem * docptr = this->virtadr; | |
711 | struct Nand *mychip = &this->chips[to >> (this->chipshift)]; | |
712 | ||
713 | /* Don't allow write past end of device */ | |
714 | if (to >= this->totlen) | |
715 | return -EINVAL; | |
716 | ||
717 | /* Don't allow writes which aren't exactly one block (512 bytes) */ | |
718 | if ((to & 0x1ff) || (len != 0x200)) | |
719 | return -EINVAL; | |
720 | ||
721 | /* Determine position of OOB flags, before or after data */ | |
722 | before = (this->interleave && (to & 0x200)); | |
723 | ||
724 | DoC_CheckASIC(docptr); | |
725 | ||
726 | /* Find the chip which is to be used and select it */ | |
727 | if (this->curfloor != mychip->floor) { | |
728 | DoC_SelectFloor(docptr, mychip->floor); | |
729 | DoC_SelectChip(docptr, mychip->chip); | |
730 | } else if (this->curchip != mychip->chip) { | |
731 | DoC_SelectChip(docptr, mychip->chip); | |
732 | } | |
733 | this->curfloor = mychip->floor; | |
734 | this->curchip = mychip->chip; | |
735 | ||
736 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
737 | WriteDOC(DOC_FLASH_CE, docptr, Mplus_FlashSelect); | |
738 | ||
739 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
740 | DoC_Command(docptr, NAND_CMD_RESET, 0); | |
741 | DoC_WaitReady(docptr); | |
742 | ||
743 | /* Set device to appropriate plane of flash */ | |
744 | fto = to; | |
745 | WriteDOC(DoC_GetDataOffset(mtd, &fto), docptr, Mplus_FlashCmd); | |
746 | ||
747 | /* On interleaved devices the flags for 2nd half 512 are before data */ | |
53fb84a0 | 748 | if (before) |
1da177e4 LT |
749 | fto -= 2; |
750 | ||
751 | /* issue the Serial Data In command to initial the Page Program process */ | |
752 | DoC_Command(docptr, NAND_CMD_SEQIN, 0x00); | |
753 | DoC_Address(this, 3, fto, 0x00, 0x00); | |
754 | ||
755 | /* Disable the ECC engine */ | |
756 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
757 | ||
7f8a8940 TG |
758 | if (before) { |
759 | /* Write the block status BLOCK_USED (0x5555) */ | |
760 | WriteDOC(0x55, docptr, Mil_CDSN_IO); | |
761 | WriteDOC(0x55, docptr, Mil_CDSN_IO); | |
1da177e4 LT |
762 | } |
763 | ||
7f8a8940 TG |
764 | /* init the ECC engine, see Reed-Solomon EDC/ECC 11.1 .*/ |
765 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf); | |
766 | ||
1da177e4 LT |
767 | MemWriteDOC(docptr, (unsigned char *) buf, len); |
768 | ||
7f8a8940 TG |
769 | /* Write ECC data to flash, the ECC info is generated by |
770 | the DiskOnChip ECC logic see Reed-Solomon EDC/ECC 11.1 */ | |
771 | DoC_Delay(docptr, 3); | |
1da177e4 | 772 | |
7f8a8940 TG |
773 | /* Read the ECC data through the DiskOnChip ECC logic */ |
774 | for (i = 0; i < 6; i++) | |
775 | eccbuf[i] = ReadDOC(docptr, Mplus_ECCSyndrome0 + i); | |
1da177e4 | 776 | |
7f8a8940 TG |
777 | /* disable the ECC engine */ |
778 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
1da177e4 | 779 | |
7f8a8940 TG |
780 | /* Write the ECC data to flash */ |
781 | MemWriteDOC(docptr, eccbuf, 6); | |
1da177e4 | 782 | |
7f8a8940 TG |
783 | if (!before) { |
784 | /* Write the block status BLOCK_USED (0x5555) */ | |
785 | WriteDOC(0x55, docptr, Mil_CDSN_IO+6); | |
786 | WriteDOC(0x55, docptr, Mil_CDSN_IO+7); | |
787 | } | |
1da177e4 LT |
788 | |
789 | #ifdef PSYCHO_DEBUG | |
7f8a8940 TG |
790 | printk("OOB data at %lx is %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", |
791 | (long) to, eccbuf[0], eccbuf[1], eccbuf[2], eccbuf[3], | |
792 | eccbuf[4], eccbuf[5]); | |
1da177e4 | 793 | #endif |
1da177e4 LT |
794 | |
795 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
796 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
797 | ||
798 | /* Commit the Page Program command and wait for ready | |
799 | see Software Requirement 11.4 item 1.*/ | |
800 | DoC_Command(docptr, NAND_CMD_PAGEPROG, 0x00); | |
801 | DoC_WaitReady(docptr); | |
802 | ||
803 | /* Read the status of the flash device through CDSN IO register | |
804 | see Software Requirement 11.4 item 5.*/ | |
805 | DoC_Command(docptr, NAND_CMD_STATUS, 0); | |
806 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
807 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
808 | DoC_Delay(docptr, 2); | |
809 | if ((dummy = ReadDOC(docptr, Mplus_LastDataRead)) & 1) { | |
810 | printk("MTD: Error 0x%x programming at 0x%x\n", dummy, (int)to); | |
811 | /* Error in programming | |
812 | FIXME: implement Bad Block Replacement (in nftl.c ??) */ | |
813 | *retlen = 0; | |
814 | ret = -EIO; | |
815 | } | |
816 | dummy = ReadDOC(docptr, Mplus_LastDataRead); | |
817 | ||
818 | /* Disable flash internally */ | |
819 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
820 | ||
821 | /* Let the caller know we completed it */ | |
822 | *retlen = len; | |
823 | ||
824 | return ret; | |
825 | } | |
826 | ||
8593fbc6 TG |
827 | static int doc_read_oob(struct mtd_info *mtd, loff_t ofs, |
828 | struct mtd_oob_ops *ops) | |
1da177e4 LT |
829 | { |
830 | loff_t fofs, base; | |
831 | struct DiskOnChip *this = mtd->priv; | |
832 | void __iomem * docptr = this->virtadr; | |
833 | struct Nand *mychip = &this->chips[ofs >> this->chipshift]; | |
834 | size_t i, size, got, want; | |
8593fbc6 TG |
835 | uint8_t *buf = ops->oobbuf; |
836 | size_t len = ops->len; | |
837 | ||
838 | BUG_ON(ops->mode != MTD_OOB_PLACE); | |
839 | ||
840 | ofs += ops->ooboffs; | |
1da177e4 LT |
841 | |
842 | DoC_CheckASIC(docptr); | |
843 | ||
844 | /* Find the chip which is to be used and select it */ | |
845 | if (this->curfloor != mychip->floor) { | |
846 | DoC_SelectFloor(docptr, mychip->floor); | |
847 | DoC_SelectChip(docptr, mychip->chip); | |
848 | } else if (this->curchip != mychip->chip) { | |
849 | DoC_SelectChip(docptr, mychip->chip); | |
850 | } | |
851 | this->curfloor = mychip->floor; | |
852 | this->curchip = mychip->chip; | |
853 | ||
854 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
855 | WriteDOC((DOC_FLASH_CE | DOC_FLASH_WP), docptr, Mplus_FlashSelect); | |
856 | ||
857 | /* disable the ECC engine */ | |
858 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
859 | DoC_WaitReady(docptr); | |
860 | ||
861 | /* Maximum of 16 bytes in the OOB region, so limit read to that */ | |
862 | if (len > 16) | |
863 | len = 16; | |
864 | got = 0; | |
865 | want = len; | |
866 | ||
867 | for (i = 0; ((i < 3) && (want > 0)); i++) { | |
868 | /* Figure out which region we are accessing... */ | |
869 | fofs = ofs; | |
870 | base = ofs & 0xf; | |
871 | if (!this->interleave) { | |
872 | DoC_Command(docptr, NAND_CMD_READOOB, 0); | |
873 | size = 16 - base; | |
874 | } else if (base < 6) { | |
875 | DoC_Command(docptr, DoC_GetECCOffset(mtd, &fofs), 0); | |
876 | size = 6 - base; | |
877 | } else if (base < 8) { | |
878 | DoC_Command(docptr, DoC_GetFlagsOffset(mtd, &fofs), 0); | |
879 | size = 8 - base; | |
880 | } else { | |
881 | DoC_Command(docptr, DoC_GetHdrOffset(mtd, &fofs), 0); | |
882 | size = 16 - base; | |
883 | } | |
884 | if (size > want) | |
885 | size = want; | |
886 | ||
887 | /* Issue read command */ | |
888 | DoC_Address(this, 3, fofs, 0, 0x00); | |
889 | WriteDOC(0, docptr, Mplus_FlashControl); | |
890 | DoC_WaitReady(docptr); | |
891 | ||
892 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
893 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
894 | MemReadDOC(docptr, &buf[got], size - 2); | |
895 | buf[got + size - 2] = ReadDOC(docptr, Mplus_LastDataRead); | |
896 | buf[got + size - 1] = ReadDOC(docptr, Mplus_LastDataRead); | |
897 | ||
898 | ofs += size; | |
899 | got += size; | |
900 | want -= size; | |
901 | } | |
902 | ||
903 | /* Disable flash internally */ | |
904 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
905 | ||
8593fbc6 | 906 | ops->retlen = len; |
1da177e4 LT |
907 | return 0; |
908 | } | |
909 | ||
8593fbc6 TG |
910 | static int doc_write_oob(struct mtd_info *mtd, loff_t ofs, |
911 | struct mtd_oob_ops *ops) | |
1da177e4 LT |
912 | { |
913 | volatile char dummy; | |
914 | loff_t fofs, base; | |
915 | struct DiskOnChip *this = mtd->priv; | |
916 | void __iomem * docptr = this->virtadr; | |
917 | struct Nand *mychip = &this->chips[ofs >> this->chipshift]; | |
918 | size_t i, size, got, want; | |
919 | int ret = 0; | |
8593fbc6 TG |
920 | uint8_t *buf = ops->oobbuf; |
921 | size_t len = ops->len; | |
922 | ||
923 | BUG_ON(ops->mode != MTD_OOB_PLACE); | |
924 | ||
925 | ofs += ops->ooboffs; | |
1da177e4 LT |
926 | |
927 | DoC_CheckASIC(docptr); | |
928 | ||
929 | /* Find the chip which is to be used and select it */ | |
930 | if (this->curfloor != mychip->floor) { | |
931 | DoC_SelectFloor(docptr, mychip->floor); | |
932 | DoC_SelectChip(docptr, mychip->chip); | |
933 | } else if (this->curchip != mychip->chip) { | |
934 | DoC_SelectChip(docptr, mychip->chip); | |
935 | } | |
936 | this->curfloor = mychip->floor; | |
937 | this->curchip = mychip->chip; | |
938 | ||
939 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
940 | WriteDOC(DOC_FLASH_CE, docptr, Mplus_FlashSelect); | |
941 | ||
942 | ||
943 | /* Maximum of 16 bytes in the OOB region, so limit write to that */ | |
944 | if (len > 16) | |
945 | len = 16; | |
946 | got = 0; | |
947 | want = len; | |
948 | ||
949 | for (i = 0; ((i < 3) && (want > 0)); i++) { | |
950 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
951 | DoC_Command(docptr, NAND_CMD_RESET, 0); | |
952 | DoC_WaitReady(docptr); | |
953 | ||
954 | /* Figure out which region we are accessing... */ | |
955 | fofs = ofs; | |
956 | base = ofs & 0x0f; | |
957 | if (!this->interleave) { | |
958 | WriteDOC(NAND_CMD_READOOB, docptr, Mplus_FlashCmd); | |
959 | size = 16 - base; | |
960 | } else if (base < 6) { | |
961 | WriteDOC(DoC_GetECCOffset(mtd, &fofs), docptr, Mplus_FlashCmd); | |
962 | size = 6 - base; | |
963 | } else if (base < 8) { | |
964 | WriteDOC(DoC_GetFlagsOffset(mtd, &fofs), docptr, Mplus_FlashCmd); | |
965 | size = 8 - base; | |
966 | } else { | |
967 | WriteDOC(DoC_GetHdrOffset(mtd, &fofs), docptr, Mplus_FlashCmd); | |
968 | size = 16 - base; | |
969 | } | |
970 | if (size > want) | |
971 | size = want; | |
972 | ||
973 | /* Issue the Serial Data In command to initial the Page Program process */ | |
974 | DoC_Command(docptr, NAND_CMD_SEQIN, 0x00); | |
975 | DoC_Address(this, 3, fofs, 0, 0x00); | |
976 | ||
977 | /* Disable the ECC engine */ | |
978 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
979 | ||
980 | /* Write the data via the internal pipeline through CDSN IO | |
981 | register, see Pipelined Write Operations 11.2 */ | |
982 | MemWriteDOC(docptr, (unsigned char *) &buf[got], size); | |
983 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
984 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
985 | ||
986 | /* Commit the Page Program command and wait for ready | |
987 | see Software Requirement 11.4 item 1.*/ | |
988 | DoC_Command(docptr, NAND_CMD_PAGEPROG, 0x00); | |
989 | DoC_WaitReady(docptr); | |
990 | ||
991 | /* Read the status of the flash device through CDSN IO register | |
992 | see Software Requirement 11.4 item 5.*/ | |
993 | DoC_Command(docptr, NAND_CMD_STATUS, 0x00); | |
994 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
995 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
996 | DoC_Delay(docptr, 2); | |
997 | if ((dummy = ReadDOC(docptr, Mplus_LastDataRead)) & 1) { | |
998 | printk("MTD: Error 0x%x programming oob at 0x%x\n", | |
999 | dummy, (int)ofs); | |
1000 | /* FIXME: implement Bad Block Replacement */ | |
8593fbc6 | 1001 | ops->retlen = 0; |
1da177e4 LT |
1002 | ret = -EIO; |
1003 | } | |
1004 | dummy = ReadDOC(docptr, Mplus_LastDataRead); | |
1005 | ||
1006 | ofs += size; | |
1007 | got += size; | |
1008 | want -= size; | |
1009 | } | |
1010 | ||
1011 | /* Disable flash internally */ | |
1012 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
1013 | ||
8593fbc6 | 1014 | ops->retlen = len; |
1da177e4 LT |
1015 | return ret; |
1016 | } | |
1017 | ||
1018 | int doc_erase(struct mtd_info *mtd, struct erase_info *instr) | |
1019 | { | |
1020 | volatile char dummy; | |
1021 | struct DiskOnChip *this = mtd->priv; | |
1022 | __u32 ofs = instr->addr; | |
1023 | __u32 len = instr->len; | |
1024 | void __iomem * docptr = this->virtadr; | |
1025 | struct Nand *mychip = &this->chips[ofs >> this->chipshift]; | |
1026 | ||
1027 | DoC_CheckASIC(docptr); | |
1028 | ||
e5580fbe | 1029 | if (len != mtd->erasesize) |
1da177e4 LT |
1030 | printk(KERN_WARNING "MTD: Erase not right size (%x != %x)n", |
1031 | len, mtd->erasesize); | |
1032 | ||
1033 | /* Find the chip which is to be used and select it */ | |
1034 | if (this->curfloor != mychip->floor) { | |
1035 | DoC_SelectFloor(docptr, mychip->floor); | |
1036 | DoC_SelectChip(docptr, mychip->chip); | |
1037 | } else if (this->curchip != mychip->chip) { | |
1038 | DoC_SelectChip(docptr, mychip->chip); | |
1039 | } | |
1040 | this->curfloor = mychip->floor; | |
1041 | this->curchip = mychip->chip; | |
1042 | ||
1043 | instr->state = MTD_ERASE_PENDING; | |
1044 | ||
1045 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
1046 | WriteDOC(DOC_FLASH_CE, docptr, Mplus_FlashSelect); | |
1047 | ||
1048 | DoC_Command(docptr, NAND_CMD_RESET, 0x00); | |
1049 | DoC_WaitReady(docptr); | |
1050 | ||
1051 | DoC_Command(docptr, NAND_CMD_ERASE1, 0); | |
1052 | DoC_Address(this, 2, ofs, 0, 0x00); | |
1053 | DoC_Command(docptr, NAND_CMD_ERASE2, 0); | |
1054 | DoC_WaitReady(docptr); | |
1055 | instr->state = MTD_ERASING; | |
1056 | ||
1057 | /* Read the status of the flash device through CDSN IO register | |
1058 | see Software Requirement 11.4 item 5. */ | |
1059 | DoC_Command(docptr, NAND_CMD_STATUS, 0); | |
1060 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
1061 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
1062 | if ((dummy = ReadDOC(docptr, Mplus_LastDataRead)) & 1) { | |
1063 | printk("MTD: Error 0x%x erasing at 0x%x\n", dummy, ofs); | |
1064 | /* FIXME: implement Bad Block Replacement (in nftl.c ??) */ | |
1065 | instr->state = MTD_ERASE_FAILED; | |
1066 | } else { | |
1067 | instr->state = MTD_ERASE_DONE; | |
1068 | } | |
1069 | dummy = ReadDOC(docptr, Mplus_LastDataRead); | |
1070 | ||
1071 | /* Disable flash internally */ | |
1072 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
1073 | ||
1074 | mtd_erase_callback(instr); | |
1075 | ||
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | /**************************************************************************** | |
1080 | * | |
1081 | * Module stuff | |
1082 | * | |
1083 | ****************************************************************************/ | |
1084 | ||
1da177e4 LT |
1085 | static void __exit cleanup_doc2001plus(void) |
1086 | { | |
1087 | struct mtd_info *mtd; | |
1088 | struct DiskOnChip *this; | |
1089 | ||
1090 | while ((mtd=docmilpluslist)) { | |
1091 | this = mtd->priv; | |
1092 | docmilpluslist = this->nextdoc; | |
e5580fbe | 1093 | |
1da177e4 | 1094 | del_mtd_device(mtd); |
e5580fbe | 1095 | |
1da177e4 LT |
1096 | iounmap(this->virtadr); |
1097 | kfree(this->chips); | |
1098 | kfree(mtd); | |
1099 | } | |
1da177e4 LT |
1100 | } |
1101 | ||
1102 | module_exit(cleanup_doc2001plus); | |
1da177e4 LT |
1103 | |
1104 | MODULE_LICENSE("GPL"); | |
1105 | MODULE_AUTHOR("Greg Ungerer <gerg@snapgear.com> et al."); | |
1106 | MODULE_DESCRIPTION("Driver for DiskOnChip Millennium Plus"); |