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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 | * | |
e5580fbe | 9 | * $Id: doc2001plus.c,v 1.14 2005/11/07 11:14:24 gleixner Exp $ |
1da177e4 LT |
10 | * |
11 | * Released under GPL | |
12 | */ | |
13 | ||
14 | #include <linux/kernel.h> | |
15 | #include <linux/module.h> | |
16 | #include <asm/errno.h> | |
17 | #include <asm/io.h> | |
18 | #include <asm/uaccess.h> | |
19 | #include <linux/miscdevice.h> | |
1da177e4 LT |
20 | #include <linux/delay.h> |
21 | #include <linux/slab.h> | |
1da177e4 LT |
22 | #include <linux/init.h> |
23 | #include <linux/types.h> | |
24 | #include <linux/bitops.h> | |
25 | ||
26 | #include <linux/mtd/mtd.h> | |
27 | #include <linux/mtd/nand.h> | |
28 | #include <linux/mtd/doc2000.h> | |
29 | ||
30 | /* #define ECC_DEBUG */ | |
31 | ||
32 | /* I have no idea why some DoC chips can not use memcop_form|to_io(). | |
33 | * This may be due to the different revisions of the ASIC controller built-in or | |
34 | * simplily a QA/Bug issue. Who knows ?? If you have trouble, please uncomment | |
35 | * this:*/ | |
36 | #undef USE_MEMCPY | |
37 | ||
38 | static int doc_read(struct mtd_info *mtd, loff_t from, size_t len, | |
39 | size_t *retlen, u_char *buf); | |
40 | static int doc_write(struct mtd_info *mtd, loff_t to, size_t len, | |
41 | size_t *retlen, const u_char *buf); | |
8593fbc6 TG |
42 | static int doc_read_oob(struct mtd_info *mtd, loff_t ofs, |
43 | struct mtd_oob_ops *ops); | |
44 | static int doc_write_oob(struct mtd_info *mtd, loff_t ofs, | |
45 | struct mtd_oob_ops *ops); | |
1da177e4 LT |
46 | static int doc_erase (struct mtd_info *mtd, struct erase_info *instr); |
47 | ||
48 | static struct mtd_info *docmilpluslist = NULL; | |
49 | ||
50 | ||
51 | /* Perform the required delay cycles by writing to the NOP register */ | |
52 | static void DoC_Delay(void __iomem * docptr, int cycles) | |
53 | { | |
54 | int i; | |
55 | ||
56 | for (i = 0; (i < cycles); i++) | |
57 | WriteDOC(0, docptr, Mplus_NOP); | |
58 | } | |
59 | ||
60 | #define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1) | |
61 | ||
62 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
63 | static int _DoC_WaitReady(void __iomem * docptr) | |
64 | { | |
65 | unsigned int c = 0xffff; | |
66 | ||
67 | DEBUG(MTD_DEBUG_LEVEL3, | |
68 | "_DoC_WaitReady called for out-of-line wait\n"); | |
69 | ||
70 | /* Out-of-line routine to wait for chip response */ | |
71 | while (((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) && --c) | |
72 | ; | |
73 | ||
74 | if (c == 0) | |
75 | DEBUG(MTD_DEBUG_LEVEL2, "_DoC_WaitReady timed out.\n"); | |
76 | ||
77 | return (c == 0); | |
78 | } | |
79 | ||
80 | static inline int DoC_WaitReady(void __iomem * docptr) | |
81 | { | |
82 | /* This is inline, to optimise the common case, where it's ready instantly */ | |
83 | int ret = 0; | |
84 | ||
85 | /* read form NOP register should be issued prior to the read from CDSNControl | |
86 | see Software Requirement 11.4 item 2. */ | |
87 | DoC_Delay(docptr, 4); | |
88 | ||
89 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) | |
90 | /* Call the out-of-line routine to wait */ | |
91 | ret = _DoC_WaitReady(docptr); | |
92 | ||
93 | return ret; | |
94 | } | |
95 | ||
96 | /* For some reason the Millennium Plus seems to occassionally put itself | |
97 | * into reset mode. For me this happens randomly, with no pattern that I | |
98 | * can detect. M-systems suggest always check this on any block level | |
99 | * operation and setting to normal mode if in reset mode. | |
100 | */ | |
101 | static inline void DoC_CheckASIC(void __iomem * docptr) | |
102 | { | |
103 | /* Make sure the DoC is in normal mode */ | |
104 | if ((ReadDOC(docptr, Mplus_DOCControl) & DOC_MODE_NORMAL) == 0) { | |
105 | WriteDOC((DOC_MODE_NORMAL | DOC_MODE_MDWREN), docptr, Mplus_DOCControl); | |
106 | WriteDOC(~(DOC_MODE_NORMAL | DOC_MODE_MDWREN), docptr, Mplus_CtrlConfirm); | |
107 | } | |
108 | } | |
109 | ||
110 | /* DoC_Command: Send a flash command to the flash chip through the Flash | |
111 | * command register. Need 2 Write Pipeline Terminates to complete send. | |
112 | */ | |
858119e1 | 113 | static void DoC_Command(void __iomem * docptr, unsigned char command, |
1da177e4 LT |
114 | unsigned char xtraflags) |
115 | { | |
116 | WriteDOC(command, docptr, Mplus_FlashCmd); | |
117 | WriteDOC(command, docptr, Mplus_WritePipeTerm); | |
118 | WriteDOC(command, docptr, Mplus_WritePipeTerm); | |
119 | } | |
120 | ||
121 | /* DoC_Address: Set the current address for the flash chip through the Flash | |
122 | * Address register. Need 2 Write Pipeline Terminates to complete send. | |
123 | */ | |
124 | static inline void DoC_Address(struct DiskOnChip *doc, int numbytes, | |
125 | unsigned long ofs, unsigned char xtraflags1, | |
126 | unsigned char xtraflags2) | |
127 | { | |
128 | void __iomem * docptr = doc->virtadr; | |
129 | ||
130 | /* Allow for possible Mill Plus internal flash interleaving */ | |
131 | ofs >>= doc->interleave; | |
132 | ||
133 | switch (numbytes) { | |
134 | case 1: | |
135 | /* Send single byte, bits 0-7. */ | |
136 | WriteDOC(ofs & 0xff, docptr, Mplus_FlashAddress); | |
137 | break; | |
138 | case 2: | |
139 | /* Send bits 9-16 followed by 17-23 */ | |
140 | WriteDOC((ofs >> 9) & 0xff, docptr, Mplus_FlashAddress); | |
141 | WriteDOC((ofs >> 17) & 0xff, docptr, Mplus_FlashAddress); | |
142 | break; | |
143 | case 3: | |
144 | /* Send 0-7, 9-16, then 17-23 */ | |
145 | WriteDOC(ofs & 0xff, docptr, Mplus_FlashAddress); | |
146 | WriteDOC((ofs >> 9) & 0xff, docptr, Mplus_FlashAddress); | |
147 | WriteDOC((ofs >> 17) & 0xff, docptr, Mplus_FlashAddress); | |
148 | break; | |
149 | default: | |
150 | return; | |
151 | } | |
152 | ||
153 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
154 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
155 | } | |
156 | ||
157 | /* DoC_SelectChip: Select a given flash chip within the current floor */ | |
158 | static int DoC_SelectChip(void __iomem * docptr, int chip) | |
159 | { | |
160 | /* No choice for flash chip on Millennium Plus */ | |
161 | return 0; | |
162 | } | |
163 | ||
164 | /* DoC_SelectFloor: Select a given floor (bank of flash chips) */ | |
165 | static int DoC_SelectFloor(void __iomem * docptr, int floor) | |
166 | { | |
167 | WriteDOC((floor & 0x3), docptr, Mplus_DeviceSelect); | |
168 | return 0; | |
169 | } | |
170 | ||
171 | /* | |
172 | * Translate the given offset into the appropriate command and offset. | |
173 | * This does the mapping using the 16bit interleave layout defined by | |
174 | * M-Systems, and looks like this for a sector pair: | |
175 | * +-----------+-------+-------+-------+--------------+---------+-----------+ | |
176 | * | 0 --- 511 |512-517|518-519|520-521| 522 --- 1033 |1034-1039|1040 - 1055| | |
177 | * +-----------+-------+-------+-------+--------------+---------+-----------+ | |
178 | * | Data 0 | ECC 0 |Flags0 |Flags1 | Data 1 |ECC 1 | OOB 1 + 2 | | |
179 | * +-----------+-------+-------+-------+--------------+---------+-----------+ | |
180 | */ | |
181 | /* FIXME: This lives in INFTL not here. Other users of flash devices | |
182 | may not want it */ | |
183 | static unsigned int DoC_GetDataOffset(struct mtd_info *mtd, loff_t *from) | |
184 | { | |
185 | struct DiskOnChip *this = mtd->priv; | |
186 | ||
187 | if (this->interleave) { | |
188 | unsigned int ofs = *from & 0x3ff; | |
189 | unsigned int cmd; | |
190 | ||
191 | if (ofs < 512) { | |
192 | cmd = NAND_CMD_READ0; | |
193 | ofs &= 0x1ff; | |
194 | } else if (ofs < 1014) { | |
195 | cmd = NAND_CMD_READ1; | |
196 | ofs = (ofs & 0x1ff) + 10; | |
197 | } else { | |
198 | cmd = NAND_CMD_READOOB; | |
199 | ofs = ofs - 1014; | |
200 | } | |
201 | ||
202 | *from = (*from & ~0x3ff) | ofs; | |
203 | return cmd; | |
204 | } else { | |
205 | /* No interleave */ | |
206 | if ((*from) & 0x100) | |
207 | return NAND_CMD_READ1; | |
208 | return NAND_CMD_READ0; | |
209 | } | |
210 | } | |
211 | ||
212 | static unsigned int DoC_GetECCOffset(struct mtd_info *mtd, loff_t *from) | |
213 | { | |
214 | unsigned int ofs, cmd; | |
215 | ||
216 | if (*from & 0x200) { | |
217 | cmd = NAND_CMD_READOOB; | |
218 | ofs = 10 + (*from & 0xf); | |
219 | } else { | |
220 | cmd = NAND_CMD_READ1; | |
221 | ofs = (*from & 0xf); | |
222 | } | |
223 | ||
224 | *from = (*from & ~0x3ff) | ofs; | |
225 | return cmd; | |
226 | } | |
227 | ||
228 | static unsigned int DoC_GetFlagsOffset(struct mtd_info *mtd, loff_t *from) | |
229 | { | |
230 | unsigned int ofs, cmd; | |
231 | ||
232 | cmd = NAND_CMD_READ1; | |
233 | ofs = (*from & 0x200) ? 8 : 6; | |
234 | *from = (*from & ~0x3ff) | ofs; | |
235 | return cmd; | |
236 | } | |
237 | ||
238 | static unsigned int DoC_GetHdrOffset(struct mtd_info *mtd, loff_t *from) | |
239 | { | |
240 | unsigned int ofs, cmd; | |
241 | ||
242 | cmd = NAND_CMD_READOOB; | |
243 | ofs = (*from & 0x200) ? 24 : 16; | |
244 | *from = (*from & ~0x3ff) | ofs; | |
245 | return cmd; | |
246 | } | |
247 | ||
248 | static inline void MemReadDOC(void __iomem * docptr, unsigned char *buf, int len) | |
249 | { | |
250 | #ifndef USE_MEMCPY | |
251 | int i; | |
252 | for (i = 0; i < len; i++) | |
253 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO + i); | |
254 | #else | |
255 | memcpy_fromio(buf, docptr + DoC_Mil_CDSN_IO, len); | |
256 | #endif | |
257 | } | |
258 | ||
259 | static inline void MemWriteDOC(void __iomem * docptr, unsigned char *buf, int len) | |
260 | { | |
261 | #ifndef USE_MEMCPY | |
262 | int i; | |
263 | for (i = 0; i < len; i++) | |
264 | WriteDOC(buf[i], docptr, Mil_CDSN_IO + i); | |
265 | #else | |
266 | memcpy_toio(docptr + DoC_Mil_CDSN_IO, buf, len); | |
267 | #endif | |
268 | } | |
269 | ||
270 | /* DoC_IdentChip: Identify a given NAND chip given {floor,chip} */ | |
271 | static int DoC_IdentChip(struct DiskOnChip *doc, int floor, int chip) | |
272 | { | |
273 | int mfr, id, i, j; | |
274 | volatile char dummy; | |
275 | void __iomem * docptr = doc->virtadr; | |
276 | ||
277 | /* Page in the required floor/chip */ | |
278 | DoC_SelectFloor(docptr, floor); | |
279 | DoC_SelectChip(docptr, chip); | |
280 | ||
281 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
282 | WriteDOC((DOC_FLASH_CE | DOC_FLASH_WP), docptr, Mplus_FlashSelect); | |
283 | ||
284 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
285 | DoC_Command(docptr, NAND_CMD_RESET, 0); | |
286 | DoC_WaitReady(docptr); | |
287 | ||
e5580fbe | 288 | /* Read the NAND chip ID: 1. Send ReadID command */ |
1da177e4 LT |
289 | DoC_Command(docptr, NAND_CMD_READID, 0); |
290 | ||
e5580fbe | 291 | /* Read the NAND chip ID: 2. Send address byte zero */ |
1da177e4 LT |
292 | DoC_Address(doc, 1, 0x00, 0, 0x00); |
293 | ||
294 | WriteDOC(0, docptr, Mplus_FlashControl); | |
295 | DoC_WaitReady(docptr); | |
296 | ||
297 | /* Read the manufacturer and device id codes of the flash device through | |
298 | CDSN IO register see Software Requirement 11.4 item 5.*/ | |
299 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
300 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
301 | ||
302 | mfr = ReadDOC(docptr, Mil_CDSN_IO); | |
303 | if (doc->interleave) | |
304 | dummy = ReadDOC(docptr, Mil_CDSN_IO); /* 2 way interleave */ | |
305 | ||
306 | id = ReadDOC(docptr, Mil_CDSN_IO); | |
307 | if (doc->interleave) | |
308 | dummy = ReadDOC(docptr, Mil_CDSN_IO); /* 2 way interleave */ | |
309 | ||
310 | dummy = ReadDOC(docptr, Mplus_LastDataRead); | |
311 | dummy = ReadDOC(docptr, Mplus_LastDataRead); | |
312 | ||
313 | /* Disable flash internally */ | |
314 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
315 | ||
316 | /* No response - return failure */ | |
317 | if (mfr == 0xff || mfr == 0) | |
318 | return 0; | |
319 | ||
320 | for (i = 0; nand_flash_ids[i].name != NULL; i++) { | |
321 | if (id == nand_flash_ids[i].id) { | |
322 | /* Try to identify manufacturer */ | |
323 | for (j = 0; nand_manuf_ids[j].id != 0x0; j++) { | |
324 | if (nand_manuf_ids[j].id == mfr) | |
325 | break; | |
326 | } | |
327 | printk(KERN_INFO "Flash chip found: Manufacturer ID: %2.2X, " | |
328 | "Chip ID: %2.2X (%s:%s)\n", mfr, id, | |
329 | nand_manuf_ids[j].name, nand_flash_ids[i].name); | |
330 | doc->mfr = mfr; | |
331 | doc->id = id; | |
332 | doc->chipshift = ffs((nand_flash_ids[i].chipsize << 20)) - 1; | |
333 | doc->erasesize = nand_flash_ids[i].erasesize << doc->interleave; | |
334 | break; | |
335 | } | |
336 | } | |
337 | ||
338 | if (nand_flash_ids[i].name == NULL) | |
339 | return 0; | |
340 | return 1; | |
341 | } | |
342 | ||
343 | /* DoC_ScanChips: Find all NAND chips present in a DiskOnChip, and identify them */ | |
344 | static void DoC_ScanChips(struct DiskOnChip *this) | |
345 | { | |
346 | int floor, chip; | |
347 | int numchips[MAX_FLOORS_MPLUS]; | |
348 | int ret; | |
349 | ||
350 | this->numchips = 0; | |
351 | this->mfr = 0; | |
352 | this->id = 0; | |
353 | ||
354 | /* Work out the intended interleave setting */ | |
355 | this->interleave = 0; | |
356 | if (this->ChipID == DOC_ChipID_DocMilPlus32) | |
357 | this->interleave = 1; | |
358 | ||
359 | /* Check the ASIC agrees */ | |
e5580fbe | 360 | if ( (this->interleave << 2) != |
1da177e4 LT |
361 | (ReadDOC(this->virtadr, Mplus_Configuration) & 4)) { |
362 | u_char conf = ReadDOC(this->virtadr, Mplus_Configuration); | |
363 | printk(KERN_NOTICE "Setting DiskOnChip Millennium Plus interleave to %s\n", | |
364 | this->interleave?"on (16-bit)":"off (8-bit)"); | |
365 | conf ^= 4; | |
366 | WriteDOC(conf, this->virtadr, Mplus_Configuration); | |
367 | } | |
368 | ||
369 | /* For each floor, find the number of valid chips it contains */ | |
370 | for (floor = 0,ret = 1; floor < MAX_FLOORS_MPLUS; floor++) { | |
371 | numchips[floor] = 0; | |
372 | for (chip = 0; chip < MAX_CHIPS_MPLUS && ret != 0; chip++) { | |
373 | ret = DoC_IdentChip(this, floor, chip); | |
374 | if (ret) { | |
375 | numchips[floor]++; | |
376 | this->numchips++; | |
377 | } | |
378 | } | |
379 | } | |
380 | /* If there are none at all that we recognise, bail */ | |
381 | if (!this->numchips) { | |
382 | printk("No flash chips recognised.\n"); | |
383 | return; | |
384 | } | |
385 | ||
386 | /* Allocate an array to hold the information for each chip */ | |
387 | this->chips = kmalloc(sizeof(struct Nand) * this->numchips, GFP_KERNEL); | |
388 | if (!this->chips){ | |
389 | printk("MTD: No memory for allocating chip info structures\n"); | |
390 | return; | |
391 | } | |
392 | ||
e5580fbe | 393 | /* Fill out the chip array with {floor, chipno} for each |
1da177e4 LT |
394 | * detected chip in the device. */ |
395 | for (floor = 0, ret = 0; floor < MAX_FLOORS_MPLUS; floor++) { | |
396 | for (chip = 0 ; chip < numchips[floor] ; chip++) { | |
397 | this->chips[ret].floor = floor; | |
398 | this->chips[ret].chip = chip; | |
399 | this->chips[ret].curadr = 0; | |
400 | this->chips[ret].curmode = 0x50; | |
401 | ret++; | |
402 | } | |
403 | } | |
404 | ||
405 | /* Calculate and print the total size of the device */ | |
406 | this->totlen = this->numchips * (1 << this->chipshift); | |
407 | printk(KERN_INFO "%d flash chips found. Total DiskOnChip size: %ld MiB\n", | |
408 | this->numchips ,this->totlen >> 20); | |
409 | } | |
410 | ||
411 | static int DoCMilPlus_is_alias(struct DiskOnChip *doc1, struct DiskOnChip *doc2) | |
412 | { | |
413 | int tmp1, tmp2, retval; | |
414 | ||
415 | if (doc1->physadr == doc2->physadr) | |
416 | return 1; | |
417 | ||
418 | /* Use the alias resolution register which was set aside for this | |
419 | * purpose. If it's value is the same on both chips, they might | |
420 | * be the same chip, and we write to one and check for a change in | |
421 | * the other. It's unclear if this register is usuable in the | |
422 | * DoC 2000 (it's in the Millennium docs), but it seems to work. */ | |
423 | tmp1 = ReadDOC(doc1->virtadr, Mplus_AliasResolution); | |
424 | tmp2 = ReadDOC(doc2->virtadr, Mplus_AliasResolution); | |
425 | if (tmp1 != tmp2) | |
426 | return 0; | |
e5580fbe | 427 | |
1da177e4 LT |
428 | WriteDOC((tmp1+1) % 0xff, doc1->virtadr, Mplus_AliasResolution); |
429 | tmp2 = ReadDOC(doc2->virtadr, Mplus_AliasResolution); | |
430 | if (tmp2 == (tmp1+1) % 0xff) | |
431 | retval = 1; | |
432 | else | |
433 | retval = 0; | |
434 | ||
435 | /* Restore register contents. May not be necessary, but do it just to | |
436 | * be safe. */ | |
437 | WriteDOC(tmp1, doc1->virtadr, Mplus_AliasResolution); | |
438 | ||
439 | return retval; | |
440 | } | |
441 | ||
5e535429 DW |
442 | /* This routine is found from the docprobe code by symbol_get(), |
443 | * which will bump the use count of this module. */ | |
444 | void DoCMilPlus_init(struct mtd_info *mtd) | |
1da177e4 LT |
445 | { |
446 | struct DiskOnChip *this = mtd->priv; | |
447 | struct DiskOnChip *old = NULL; | |
448 | ||
449 | /* We must avoid being called twice for the same device. */ | |
450 | if (docmilpluslist) | |
451 | old = docmilpluslist->priv; | |
452 | ||
453 | while (old) { | |
454 | if (DoCMilPlus_is_alias(this, old)) { | |
455 | printk(KERN_NOTICE "Ignoring DiskOnChip Millennium " | |
456 | "Plus at 0x%lX - already configured\n", | |
457 | this->physadr); | |
458 | iounmap(this->virtadr); | |
459 | kfree(mtd); | |
460 | return; | |
461 | } | |
462 | if (old->nextdoc) | |
463 | old = old->nextdoc->priv; | |
464 | else | |
465 | old = NULL; | |
466 | } | |
467 | ||
468 | mtd->name = "DiskOnChip Millennium Plus"; | |
469 | printk(KERN_NOTICE "DiskOnChip Millennium Plus found at " | |
470 | "address 0x%lX\n", this->physadr); | |
471 | ||
472 | mtd->type = MTD_NANDFLASH; | |
473 | mtd->flags = MTD_CAP_NANDFLASH; | |
1da177e4 LT |
474 | mtd->size = 0; |
475 | ||
476 | mtd->erasesize = 0; | |
28318776 | 477 | mtd->writesize = 512; |
1da177e4 LT |
478 | mtd->oobsize = 16; |
479 | mtd->owner = THIS_MODULE; | |
480 | mtd->erase = doc_erase; | |
481 | mtd->point = NULL; | |
482 | mtd->unpoint = NULL; | |
483 | mtd->read = doc_read; | |
484 | mtd->write = doc_write; | |
1da177e4 LT |
485 | mtd->read_oob = doc_read_oob; |
486 | mtd->write_oob = doc_write_oob; | |
487 | mtd->sync = NULL; | |
488 | ||
489 | this->totlen = 0; | |
490 | this->numchips = 0; | |
491 | this->curfloor = -1; | |
492 | this->curchip = -1; | |
493 | ||
494 | /* Ident all the chips present. */ | |
495 | DoC_ScanChips(this); | |
496 | ||
497 | if (!this->totlen) { | |
498 | kfree(mtd); | |
499 | iounmap(this->virtadr); | |
500 | } else { | |
501 | this->nextdoc = docmilpluslist; | |
502 | docmilpluslist = mtd; | |
503 | mtd->size = this->totlen; | |
504 | mtd->erasesize = this->erasesize; | |
505 | add_mtd_device(mtd); | |
506 | return; | |
507 | } | |
508 | } | |
b04ecae3 | 509 | EXPORT_SYMBOL_GPL(DoCMilPlus_init); |
1da177e4 LT |
510 | |
511 | #if 0 | |
512 | static int doc_dumpblk(struct mtd_info *mtd, loff_t from) | |
513 | { | |
514 | int i; | |
515 | loff_t fofs; | |
516 | struct DiskOnChip *this = mtd->priv; | |
517 | void __iomem * docptr = this->virtadr; | |
518 | struct Nand *mychip = &this->chips[from >> (this->chipshift)]; | |
519 | unsigned char *bp, buf[1056]; | |
520 | char c[32]; | |
521 | ||
522 | from &= ~0x3ff; | |
523 | ||
524 | /* Don't allow read past end of device */ | |
525 | if (from >= this->totlen) | |
526 | return -EINVAL; | |
527 | ||
528 | DoC_CheckASIC(docptr); | |
529 | ||
530 | /* Find the chip which is to be used and select it */ | |
531 | if (this->curfloor != mychip->floor) { | |
532 | DoC_SelectFloor(docptr, mychip->floor); | |
533 | DoC_SelectChip(docptr, mychip->chip); | |
534 | } else if (this->curchip != mychip->chip) { | |
535 | DoC_SelectChip(docptr, mychip->chip); | |
536 | } | |
537 | this->curfloor = mychip->floor; | |
538 | this->curchip = mychip->chip; | |
539 | ||
540 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
541 | WriteDOC((DOC_FLASH_CE | DOC_FLASH_WP), docptr, Mplus_FlashSelect); | |
542 | ||
543 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
544 | DoC_Command(docptr, NAND_CMD_RESET, 0); | |
545 | DoC_WaitReady(docptr); | |
546 | ||
547 | fofs = from; | |
548 | DoC_Command(docptr, DoC_GetDataOffset(mtd, &fofs), 0); | |
549 | DoC_Address(this, 3, fofs, 0, 0x00); | |
550 | WriteDOC(0, docptr, Mplus_FlashControl); | |
551 | DoC_WaitReady(docptr); | |
552 | ||
553 | /* disable the ECC engine */ | |
554 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
555 | ||
556 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
557 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
558 | ||
559 | /* Read the data via the internal pipeline through CDSN IO | |
560 | register, see Pipelined Read Operations 11.3 */ | |
561 | MemReadDOC(docptr, buf, 1054); | |
562 | buf[1054] = ReadDOC(docptr, Mplus_LastDataRead); | |
563 | buf[1055] = ReadDOC(docptr, Mplus_LastDataRead); | |
564 | ||
565 | memset(&c[0], 0, sizeof(c)); | |
566 | printk("DUMP OFFSET=%x:\n", (int)from); | |
567 | ||
568 | for (i = 0, bp = &buf[0]; (i < 1056); i++) { | |
569 | if ((i % 16) == 0) | |
570 | printk("%08x: ", i); | |
571 | printk(" %02x", *bp); | |
572 | c[(i & 0xf)] = ((*bp >= 0x20) && (*bp <= 0x7f)) ? *bp : '.'; | |
573 | bp++; | |
574 | if (((i + 1) % 16) == 0) | |
575 | printk(" %s\n", c); | |
576 | } | |
577 | printk("\n"); | |
578 | ||
579 | /* Disable flash internally */ | |
580 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
581 | ||
582 | return 0; | |
583 | } | |
584 | #endif | |
585 | ||
586 | static int doc_read(struct mtd_info *mtd, loff_t from, size_t len, | |
587 | size_t *retlen, u_char *buf) | |
1da177e4 LT |
588 | { |
589 | int ret, i; | |
590 | volatile char dummy; | |
591 | loff_t fofs; | |
7f8a8940 | 592 | unsigned char syndrome[6], eccbuf[6]; |
1da177e4 LT |
593 | struct DiskOnChip *this = mtd->priv; |
594 | void __iomem * docptr = this->virtadr; | |
595 | struct Nand *mychip = &this->chips[from >> (this->chipshift)]; | |
596 | ||
597 | /* Don't allow read past end of device */ | |
598 | if (from >= this->totlen) | |
599 | return -EINVAL; | |
600 | ||
601 | /* Don't allow a single read to cross a 512-byte block boundary */ | |
e5580fbe | 602 | if (from + len > ((from | 0x1ff) + 1)) |
1da177e4 LT |
603 | len = ((from | 0x1ff) + 1) - from; |
604 | ||
605 | DoC_CheckASIC(docptr); | |
606 | ||
607 | /* Find the chip which is to be used and select it */ | |
608 | if (this->curfloor != mychip->floor) { | |
609 | DoC_SelectFloor(docptr, mychip->floor); | |
610 | DoC_SelectChip(docptr, mychip->chip); | |
611 | } else if (this->curchip != mychip->chip) { | |
612 | DoC_SelectChip(docptr, mychip->chip); | |
613 | } | |
614 | this->curfloor = mychip->floor; | |
615 | this->curchip = mychip->chip; | |
616 | ||
617 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
618 | WriteDOC((DOC_FLASH_CE | DOC_FLASH_WP), docptr, Mplus_FlashSelect); | |
619 | ||
620 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
621 | DoC_Command(docptr, NAND_CMD_RESET, 0); | |
622 | DoC_WaitReady(docptr); | |
623 | ||
624 | fofs = from; | |
625 | DoC_Command(docptr, DoC_GetDataOffset(mtd, &fofs), 0); | |
626 | DoC_Address(this, 3, fofs, 0, 0x00); | |
627 | WriteDOC(0, docptr, Mplus_FlashControl); | |
628 | DoC_WaitReady(docptr); | |
629 | ||
7f8a8940 TG |
630 | /* init the ECC engine, see Reed-Solomon EDC/ECC 11.1 .*/ |
631 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
632 | WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf); | |
1da177e4 LT |
633 | |
634 | /* Let the caller know we completed it */ | |
635 | *retlen = len; | |
7f8a8940 | 636 | ret = 0; |
1da177e4 LT |
637 | |
638 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
639 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
640 | ||
7f8a8940 TG |
641 | /* Read the data via the internal pipeline through CDSN IO |
642 | register, see Pipelined Read Operations 11.3 */ | |
643 | MemReadDOC(docptr, buf, len); | |
1da177e4 | 644 | |
7f8a8940 TG |
645 | /* Read the ECC data following raw data */ |
646 | MemReadDOC(docptr, eccbuf, 4); | |
647 | eccbuf[4] = ReadDOC(docptr, Mplus_LastDataRead); | |
648 | eccbuf[5] = ReadDOC(docptr, Mplus_LastDataRead); | |
1da177e4 | 649 | |
7f8a8940 TG |
650 | /* Flush the pipeline */ |
651 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
652 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
1da177e4 | 653 | |
7f8a8940 TG |
654 | /* Check the ECC Status */ |
655 | if (ReadDOC(docptr, Mplus_ECCConf) & 0x80) { | |
656 | int nb_errors; | |
657 | /* There was an ECC error */ | |
1da177e4 | 658 | #ifdef ECC_DEBUG |
7f8a8940 | 659 | printk("DiskOnChip ECC Error: Read at %lx\n", (long)from); |
1da177e4 | 660 | #endif |
7f8a8940 TG |
661 | /* Read the ECC syndrom through the DiskOnChip ECC logic. |
662 | These syndrome will be all ZERO when there is no error */ | |
663 | for (i = 0; i < 6; i++) | |
664 | syndrome[i] = ReadDOC(docptr, Mplus_ECCSyndrome0 + i); | |
1da177e4 | 665 | |
7f8a8940 | 666 | nb_errors = doc_decode_ecc(buf, syndrome); |
1da177e4 | 667 | #ifdef ECC_DEBUG |
7f8a8940 | 668 | printk("ECC Errors corrected: %x\n", nb_errors); |
1da177e4 | 669 | #endif |
7f8a8940 TG |
670 | if (nb_errors < 0) { |
671 | /* We return error, but have actually done the | |
672 | read. Not that this can be told to user-space, via | |
673 | sys_read(), but at least MTD-aware stuff can know | |
674 | about it by checking *retlen */ | |
1da177e4 LT |
675 | #ifdef ECC_DEBUG |
676 | printk("%s(%d): Millennium Plus ECC error (from=0x%x:\n", | |
677 | __FILE__, __LINE__, (int)from); | |
678 | printk(" syndrome= %02x:%02x:%02x:%02x:%02x:" | |
679 | "%02x\n", | |
680 | syndrome[0], syndrome[1], syndrome[2], | |
681 | syndrome[3], syndrome[4], syndrome[5]); | |
682 | printk(" eccbuf= %02x:%02x:%02x:%02x:%02x:" | |
683 | "%02x\n", | |
684 | eccbuf[0], eccbuf[1], eccbuf[2], | |
685 | eccbuf[3], eccbuf[4], eccbuf[5]); | |
686 | #endif | |
687 | ret = -EIO; | |
1da177e4 | 688 | } |
7f8a8940 | 689 | } |
1da177e4 LT |
690 | |
691 | #ifdef PSYCHO_DEBUG | |
7f8a8940 TG |
692 | printk("ECC DATA at %lx: %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", |
693 | (long)from, eccbuf[0], eccbuf[1], eccbuf[2], eccbuf[3], | |
694 | eccbuf[4], eccbuf[5]); | |
1da177e4 | 695 | #endif |
7f8a8940 TG |
696 | /* disable the ECC engine */ |
697 | WriteDOC(DOC_ECC_DIS, docptr , Mplus_ECCConf); | |
1da177e4 LT |
698 | |
699 | /* Disable flash internally */ | |
700 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
701 | ||
702 | return ret; | |
703 | } | |
704 | ||
705 | static int doc_write(struct mtd_info *mtd, loff_t to, size_t len, | |
706 | size_t *retlen, const u_char *buf) | |
1da177e4 LT |
707 | { |
708 | int i, before, ret = 0; | |
709 | loff_t fto; | |
710 | volatile char dummy; | |
7f8a8940 | 711 | char eccbuf[6]; |
1da177e4 LT |
712 | struct DiskOnChip *this = mtd->priv; |
713 | void __iomem * docptr = this->virtadr; | |
714 | struct Nand *mychip = &this->chips[to >> (this->chipshift)]; | |
715 | ||
716 | /* Don't allow write past end of device */ | |
717 | if (to >= this->totlen) | |
718 | return -EINVAL; | |
719 | ||
720 | /* Don't allow writes which aren't exactly one block (512 bytes) */ | |
721 | if ((to & 0x1ff) || (len != 0x200)) | |
722 | return -EINVAL; | |
723 | ||
724 | /* Determine position of OOB flags, before or after data */ | |
725 | before = (this->interleave && (to & 0x200)); | |
726 | ||
727 | DoC_CheckASIC(docptr); | |
728 | ||
729 | /* Find the chip which is to be used and select it */ | |
730 | if (this->curfloor != mychip->floor) { | |
731 | DoC_SelectFloor(docptr, mychip->floor); | |
732 | DoC_SelectChip(docptr, mychip->chip); | |
733 | } else if (this->curchip != mychip->chip) { | |
734 | DoC_SelectChip(docptr, mychip->chip); | |
735 | } | |
736 | this->curfloor = mychip->floor; | |
737 | this->curchip = mychip->chip; | |
738 | ||
739 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
740 | WriteDOC(DOC_FLASH_CE, docptr, Mplus_FlashSelect); | |
741 | ||
742 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
743 | DoC_Command(docptr, NAND_CMD_RESET, 0); | |
744 | DoC_WaitReady(docptr); | |
745 | ||
746 | /* Set device to appropriate plane of flash */ | |
747 | fto = to; | |
748 | WriteDOC(DoC_GetDataOffset(mtd, &fto), docptr, Mplus_FlashCmd); | |
749 | ||
750 | /* On interleaved devices the flags for 2nd half 512 are before data */ | |
751 | if (eccbuf && before) | |
752 | fto -= 2; | |
753 | ||
754 | /* issue the Serial Data In command to initial the Page Program process */ | |
755 | DoC_Command(docptr, NAND_CMD_SEQIN, 0x00); | |
756 | DoC_Address(this, 3, fto, 0x00, 0x00); | |
757 | ||
758 | /* Disable the ECC engine */ | |
759 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
760 | ||
7f8a8940 TG |
761 | if (before) { |
762 | /* Write the block status BLOCK_USED (0x5555) */ | |
763 | WriteDOC(0x55, docptr, Mil_CDSN_IO); | |
764 | WriteDOC(0x55, docptr, Mil_CDSN_IO); | |
1da177e4 LT |
765 | } |
766 | ||
7f8a8940 TG |
767 | /* init the ECC engine, see Reed-Solomon EDC/ECC 11.1 .*/ |
768 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf); | |
769 | ||
1da177e4 LT |
770 | MemWriteDOC(docptr, (unsigned char *) buf, len); |
771 | ||
7f8a8940 TG |
772 | /* Write ECC data to flash, the ECC info is generated by |
773 | the DiskOnChip ECC logic see Reed-Solomon EDC/ECC 11.1 */ | |
774 | DoC_Delay(docptr, 3); | |
1da177e4 | 775 | |
7f8a8940 TG |
776 | /* Read the ECC data through the DiskOnChip ECC logic */ |
777 | for (i = 0; i < 6; i++) | |
778 | eccbuf[i] = ReadDOC(docptr, Mplus_ECCSyndrome0 + i); | |
1da177e4 | 779 | |
7f8a8940 TG |
780 | /* disable the ECC engine */ |
781 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
1da177e4 | 782 | |
7f8a8940 TG |
783 | /* Write the ECC data to flash */ |
784 | MemWriteDOC(docptr, eccbuf, 6); | |
1da177e4 | 785 | |
7f8a8940 TG |
786 | if (!before) { |
787 | /* Write the block status BLOCK_USED (0x5555) */ | |
788 | WriteDOC(0x55, docptr, Mil_CDSN_IO+6); | |
789 | WriteDOC(0x55, docptr, Mil_CDSN_IO+7); | |
790 | } | |
1da177e4 LT |
791 | |
792 | #ifdef PSYCHO_DEBUG | |
7f8a8940 TG |
793 | printk("OOB data at %lx is %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", |
794 | (long) to, eccbuf[0], eccbuf[1], eccbuf[2], eccbuf[3], | |
795 | eccbuf[4], eccbuf[5]); | |
1da177e4 | 796 | #endif |
1da177e4 LT |
797 | |
798 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
799 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
800 | ||
801 | /* Commit the Page Program command and wait for ready | |
802 | see Software Requirement 11.4 item 1.*/ | |
803 | DoC_Command(docptr, NAND_CMD_PAGEPROG, 0x00); | |
804 | DoC_WaitReady(docptr); | |
805 | ||
806 | /* Read the status of the flash device through CDSN IO register | |
807 | see Software Requirement 11.4 item 5.*/ | |
808 | DoC_Command(docptr, NAND_CMD_STATUS, 0); | |
809 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
810 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
811 | DoC_Delay(docptr, 2); | |
812 | if ((dummy = ReadDOC(docptr, Mplus_LastDataRead)) & 1) { | |
813 | printk("MTD: Error 0x%x programming at 0x%x\n", dummy, (int)to); | |
814 | /* Error in programming | |
815 | FIXME: implement Bad Block Replacement (in nftl.c ??) */ | |
816 | *retlen = 0; | |
817 | ret = -EIO; | |
818 | } | |
819 | dummy = ReadDOC(docptr, Mplus_LastDataRead); | |
820 | ||
821 | /* Disable flash internally */ | |
822 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
823 | ||
824 | /* Let the caller know we completed it */ | |
825 | *retlen = len; | |
826 | ||
827 | return ret; | |
828 | } | |
829 | ||
8593fbc6 TG |
830 | static int doc_read_oob(struct mtd_info *mtd, loff_t ofs, |
831 | struct mtd_oob_ops *ops) | |
1da177e4 LT |
832 | { |
833 | loff_t fofs, base; | |
834 | struct DiskOnChip *this = mtd->priv; | |
835 | void __iomem * docptr = this->virtadr; | |
836 | struct Nand *mychip = &this->chips[ofs >> this->chipshift]; | |
837 | size_t i, size, got, want; | |
8593fbc6 TG |
838 | uint8_t *buf = ops->oobbuf; |
839 | size_t len = ops->len; | |
840 | ||
841 | BUG_ON(ops->mode != MTD_OOB_PLACE); | |
842 | ||
843 | ofs += ops->ooboffs; | |
1da177e4 LT |
844 | |
845 | DoC_CheckASIC(docptr); | |
846 | ||
847 | /* Find the chip which is to be used and select it */ | |
848 | if (this->curfloor != mychip->floor) { | |
849 | DoC_SelectFloor(docptr, mychip->floor); | |
850 | DoC_SelectChip(docptr, mychip->chip); | |
851 | } else if (this->curchip != mychip->chip) { | |
852 | DoC_SelectChip(docptr, mychip->chip); | |
853 | } | |
854 | this->curfloor = mychip->floor; | |
855 | this->curchip = mychip->chip; | |
856 | ||
857 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
858 | WriteDOC((DOC_FLASH_CE | DOC_FLASH_WP), docptr, Mplus_FlashSelect); | |
859 | ||
860 | /* disable the ECC engine */ | |
861 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
862 | DoC_WaitReady(docptr); | |
863 | ||
864 | /* Maximum of 16 bytes in the OOB region, so limit read to that */ | |
865 | if (len > 16) | |
866 | len = 16; | |
867 | got = 0; | |
868 | want = len; | |
869 | ||
870 | for (i = 0; ((i < 3) && (want > 0)); i++) { | |
871 | /* Figure out which region we are accessing... */ | |
872 | fofs = ofs; | |
873 | base = ofs & 0xf; | |
874 | if (!this->interleave) { | |
875 | DoC_Command(docptr, NAND_CMD_READOOB, 0); | |
876 | size = 16 - base; | |
877 | } else if (base < 6) { | |
878 | DoC_Command(docptr, DoC_GetECCOffset(mtd, &fofs), 0); | |
879 | size = 6 - base; | |
880 | } else if (base < 8) { | |
881 | DoC_Command(docptr, DoC_GetFlagsOffset(mtd, &fofs), 0); | |
882 | size = 8 - base; | |
883 | } else { | |
884 | DoC_Command(docptr, DoC_GetHdrOffset(mtd, &fofs), 0); | |
885 | size = 16 - base; | |
886 | } | |
887 | if (size > want) | |
888 | size = want; | |
889 | ||
890 | /* Issue read command */ | |
891 | DoC_Address(this, 3, fofs, 0, 0x00); | |
892 | WriteDOC(0, docptr, Mplus_FlashControl); | |
893 | DoC_WaitReady(docptr); | |
894 | ||
895 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
896 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
897 | MemReadDOC(docptr, &buf[got], size - 2); | |
898 | buf[got + size - 2] = ReadDOC(docptr, Mplus_LastDataRead); | |
899 | buf[got + size - 1] = ReadDOC(docptr, Mplus_LastDataRead); | |
900 | ||
901 | ofs += size; | |
902 | got += size; | |
903 | want -= size; | |
904 | } | |
905 | ||
906 | /* Disable flash internally */ | |
907 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
908 | ||
8593fbc6 | 909 | ops->retlen = len; |
1da177e4 LT |
910 | return 0; |
911 | } | |
912 | ||
8593fbc6 TG |
913 | static int doc_write_oob(struct mtd_info *mtd, loff_t ofs, |
914 | struct mtd_oob_ops *ops) | |
1da177e4 LT |
915 | { |
916 | volatile char dummy; | |
917 | loff_t fofs, base; | |
918 | struct DiskOnChip *this = mtd->priv; | |
919 | void __iomem * docptr = this->virtadr; | |
920 | struct Nand *mychip = &this->chips[ofs >> this->chipshift]; | |
921 | size_t i, size, got, want; | |
922 | int ret = 0; | |
8593fbc6 TG |
923 | uint8_t *buf = ops->oobbuf; |
924 | size_t len = ops->len; | |
925 | ||
926 | BUG_ON(ops->mode != MTD_OOB_PLACE); | |
927 | ||
928 | ofs += ops->ooboffs; | |
1da177e4 LT |
929 | |
930 | DoC_CheckASIC(docptr); | |
931 | ||
932 | /* Find the chip which is to be used and select it */ | |
933 | if (this->curfloor != mychip->floor) { | |
934 | DoC_SelectFloor(docptr, mychip->floor); | |
935 | DoC_SelectChip(docptr, mychip->chip); | |
936 | } else if (this->curchip != mychip->chip) { | |
937 | DoC_SelectChip(docptr, mychip->chip); | |
938 | } | |
939 | this->curfloor = mychip->floor; | |
940 | this->curchip = mychip->chip; | |
941 | ||
942 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
943 | WriteDOC(DOC_FLASH_CE, docptr, Mplus_FlashSelect); | |
944 | ||
945 | ||
946 | /* Maximum of 16 bytes in the OOB region, so limit write to that */ | |
947 | if (len > 16) | |
948 | len = 16; | |
949 | got = 0; | |
950 | want = len; | |
951 | ||
952 | for (i = 0; ((i < 3) && (want > 0)); i++) { | |
953 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
954 | DoC_Command(docptr, NAND_CMD_RESET, 0); | |
955 | DoC_WaitReady(docptr); | |
956 | ||
957 | /* Figure out which region we are accessing... */ | |
958 | fofs = ofs; | |
959 | base = ofs & 0x0f; | |
960 | if (!this->interleave) { | |
961 | WriteDOC(NAND_CMD_READOOB, docptr, Mplus_FlashCmd); | |
962 | size = 16 - base; | |
963 | } else if (base < 6) { | |
964 | WriteDOC(DoC_GetECCOffset(mtd, &fofs), docptr, Mplus_FlashCmd); | |
965 | size = 6 - base; | |
966 | } else if (base < 8) { | |
967 | WriteDOC(DoC_GetFlagsOffset(mtd, &fofs), docptr, Mplus_FlashCmd); | |
968 | size = 8 - base; | |
969 | } else { | |
970 | WriteDOC(DoC_GetHdrOffset(mtd, &fofs), docptr, Mplus_FlashCmd); | |
971 | size = 16 - base; | |
972 | } | |
973 | if (size > want) | |
974 | size = want; | |
975 | ||
976 | /* Issue the Serial Data In command to initial the Page Program process */ | |
977 | DoC_Command(docptr, NAND_CMD_SEQIN, 0x00); | |
978 | DoC_Address(this, 3, fofs, 0, 0x00); | |
979 | ||
980 | /* Disable the ECC engine */ | |
981 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
982 | ||
983 | /* Write the data via the internal pipeline through CDSN IO | |
984 | register, see Pipelined Write Operations 11.2 */ | |
985 | MemWriteDOC(docptr, (unsigned char *) &buf[got], size); | |
986 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
987 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
988 | ||
989 | /* Commit the Page Program command and wait for ready | |
990 | see Software Requirement 11.4 item 1.*/ | |
991 | DoC_Command(docptr, NAND_CMD_PAGEPROG, 0x00); | |
992 | DoC_WaitReady(docptr); | |
993 | ||
994 | /* Read the status of the flash device through CDSN IO register | |
995 | see Software Requirement 11.4 item 5.*/ | |
996 | DoC_Command(docptr, NAND_CMD_STATUS, 0x00); | |
997 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
998 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
999 | DoC_Delay(docptr, 2); | |
1000 | if ((dummy = ReadDOC(docptr, Mplus_LastDataRead)) & 1) { | |
1001 | printk("MTD: Error 0x%x programming oob at 0x%x\n", | |
1002 | dummy, (int)ofs); | |
1003 | /* FIXME: implement Bad Block Replacement */ | |
8593fbc6 | 1004 | ops->retlen = 0; |
1da177e4 LT |
1005 | ret = -EIO; |
1006 | } | |
1007 | dummy = ReadDOC(docptr, Mplus_LastDataRead); | |
1008 | ||
1009 | ofs += size; | |
1010 | got += size; | |
1011 | want -= size; | |
1012 | } | |
1013 | ||
1014 | /* Disable flash internally */ | |
1015 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
1016 | ||
8593fbc6 | 1017 | ops->retlen = len; |
1da177e4 LT |
1018 | return ret; |
1019 | } | |
1020 | ||
1021 | int doc_erase(struct mtd_info *mtd, struct erase_info *instr) | |
1022 | { | |
1023 | volatile char dummy; | |
1024 | struct DiskOnChip *this = mtd->priv; | |
1025 | __u32 ofs = instr->addr; | |
1026 | __u32 len = instr->len; | |
1027 | void __iomem * docptr = this->virtadr; | |
1028 | struct Nand *mychip = &this->chips[ofs >> this->chipshift]; | |
1029 | ||
1030 | DoC_CheckASIC(docptr); | |
1031 | ||
e5580fbe | 1032 | if (len != mtd->erasesize) |
1da177e4 LT |
1033 | printk(KERN_WARNING "MTD: Erase not right size (%x != %x)n", |
1034 | len, mtd->erasesize); | |
1035 | ||
1036 | /* Find the chip which is to be used and select it */ | |
1037 | if (this->curfloor != mychip->floor) { | |
1038 | DoC_SelectFloor(docptr, mychip->floor); | |
1039 | DoC_SelectChip(docptr, mychip->chip); | |
1040 | } else if (this->curchip != mychip->chip) { | |
1041 | DoC_SelectChip(docptr, mychip->chip); | |
1042 | } | |
1043 | this->curfloor = mychip->floor; | |
1044 | this->curchip = mychip->chip; | |
1045 | ||
1046 | instr->state = MTD_ERASE_PENDING; | |
1047 | ||
1048 | /* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */ | |
1049 | WriteDOC(DOC_FLASH_CE, docptr, Mplus_FlashSelect); | |
1050 | ||
1051 | DoC_Command(docptr, NAND_CMD_RESET, 0x00); | |
1052 | DoC_WaitReady(docptr); | |
1053 | ||
1054 | DoC_Command(docptr, NAND_CMD_ERASE1, 0); | |
1055 | DoC_Address(this, 2, ofs, 0, 0x00); | |
1056 | DoC_Command(docptr, NAND_CMD_ERASE2, 0); | |
1057 | DoC_WaitReady(docptr); | |
1058 | instr->state = MTD_ERASING; | |
1059 | ||
1060 | /* Read the status of the flash device through CDSN IO register | |
1061 | see Software Requirement 11.4 item 5. */ | |
1062 | DoC_Command(docptr, NAND_CMD_STATUS, 0); | |
1063 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
1064 | dummy = ReadDOC(docptr, Mplus_ReadPipeInit); | |
1065 | if ((dummy = ReadDOC(docptr, Mplus_LastDataRead)) & 1) { | |
1066 | printk("MTD: Error 0x%x erasing at 0x%x\n", dummy, ofs); | |
1067 | /* FIXME: implement Bad Block Replacement (in nftl.c ??) */ | |
1068 | instr->state = MTD_ERASE_FAILED; | |
1069 | } else { | |
1070 | instr->state = MTD_ERASE_DONE; | |
1071 | } | |
1072 | dummy = ReadDOC(docptr, Mplus_LastDataRead); | |
1073 | ||
1074 | /* Disable flash internally */ | |
1075 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
1076 | ||
1077 | mtd_erase_callback(instr); | |
1078 | ||
1079 | return 0; | |
1080 | } | |
1081 | ||
1082 | /**************************************************************************** | |
1083 | * | |
1084 | * Module stuff | |
1085 | * | |
1086 | ****************************************************************************/ | |
1087 | ||
1da177e4 LT |
1088 | static void __exit cleanup_doc2001plus(void) |
1089 | { | |
1090 | struct mtd_info *mtd; | |
1091 | struct DiskOnChip *this; | |
1092 | ||
1093 | while ((mtd=docmilpluslist)) { | |
1094 | this = mtd->priv; | |
1095 | docmilpluslist = this->nextdoc; | |
e5580fbe | 1096 | |
1da177e4 | 1097 | del_mtd_device(mtd); |
e5580fbe | 1098 | |
1da177e4 LT |
1099 | iounmap(this->virtadr); |
1100 | kfree(this->chips); | |
1101 | kfree(mtd); | |
1102 | } | |
1da177e4 LT |
1103 | } |
1104 | ||
1105 | module_exit(cleanup_doc2001plus); | |
1da177e4 LT |
1106 | |
1107 | MODULE_LICENSE("GPL"); | |
1108 | MODULE_AUTHOR("Greg Ungerer <gerg@snapgear.com> et al."); | |
1109 | MODULE_DESCRIPTION("Driver for DiskOnChip Millennium Plus"); |