Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | |
2 | /* | |
3 | * Linux driver for Disk-On-Chip 2000 and Millennium | |
4 | * (c) 1999 Machine Vision Holdings, Inc. | |
5 | * (c) 1999, 2000 David Woodhouse <dwmw2@infradead.org> | |
1da177e4 LT |
6 | */ |
7 | ||
8 | #include <linux/kernel.h> | |
9 | #include <linux/module.h> | |
10 | #include <asm/errno.h> | |
11 | #include <asm/io.h> | |
12 | #include <asm/uaccess.h> | |
1da177e4 LT |
13 | #include <linux/delay.h> |
14 | #include <linux/slab.h> | |
15 | #include <linux/sched.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/types.h> | |
18 | #include <linux/bitops.h> | |
040d79f9 | 19 | #include <linux/mutex.h> |
1da177e4 LT |
20 | |
21 | #include <linux/mtd/mtd.h> | |
22 | #include <linux/mtd/nand.h> | |
23 | #include <linux/mtd/doc2000.h> | |
24 | ||
25 | #define DOC_SUPPORT_2000 | |
26 | #define DOC_SUPPORT_2000TSOP | |
27 | #define DOC_SUPPORT_MILLENNIUM | |
28 | ||
29 | #ifdef DOC_SUPPORT_2000 | |
30 | #define DoC_is_2000(doc) (doc->ChipID == DOC_ChipID_Doc2k) | |
31 | #else | |
32 | #define DoC_is_2000(doc) (0) | |
33 | #endif | |
34 | ||
35 | #if defined(DOC_SUPPORT_2000TSOP) || defined(DOC_SUPPORT_MILLENNIUM) | |
36 | #define DoC_is_Millennium(doc) (doc->ChipID == DOC_ChipID_DocMil) | |
37 | #else | |
38 | #define DoC_is_Millennium(doc) (0) | |
39 | #endif | |
40 | ||
41 | /* #define ECC_DEBUG */ | |
42 | ||
43 | /* I have no idea why some DoC chips can not use memcpy_from|to_io(). | |
44 | * This may be due to the different revisions of the ASIC controller built-in or | |
45 | * simplily a QA/Bug issue. Who knows ?? If you have trouble, please uncomment | |
46 | * this: | |
47 | #undef USE_MEMCPY | |
48 | */ | |
49 | ||
50 | static int doc_read(struct mtd_info *mtd, loff_t from, size_t len, | |
51 | size_t *retlen, u_char *buf); | |
52 | static int doc_write(struct mtd_info *mtd, loff_t to, size_t len, | |
53 | size_t *retlen, const u_char *buf); | |
8593fbc6 TG |
54 | static int doc_read_oob(struct mtd_info *mtd, loff_t ofs, |
55 | struct mtd_oob_ops *ops); | |
56 | static int doc_write_oob(struct mtd_info *mtd, loff_t ofs, | |
57 | struct mtd_oob_ops *ops); | |
1da177e4 LT |
58 | static int doc_write_oob_nolock(struct mtd_info *mtd, loff_t ofs, size_t len, |
59 | size_t *retlen, const u_char *buf); | |
60 | static int doc_erase (struct mtd_info *mtd, struct erase_info *instr); | |
61 | ||
62 | static struct mtd_info *doc2klist = NULL; | |
63 | ||
64 | /* Perform the required delay cycles by reading from the appropriate register */ | |
65 | static void DoC_Delay(struct DiskOnChip *doc, unsigned short cycles) | |
66 | { | |
67 | volatile char dummy; | |
68 | int i; | |
e5580fbe | 69 | |
1da177e4 LT |
70 | for (i = 0; i < cycles; i++) { |
71 | if (DoC_is_Millennium(doc)) | |
72 | dummy = ReadDOC(doc->virtadr, NOP); | |
73 | else | |
74 | dummy = ReadDOC(doc->virtadr, DOCStatus); | |
75 | } | |
e5580fbe | 76 | |
1da177e4 LT |
77 | } |
78 | ||
79 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
80 | static int _DoC_WaitReady(struct DiskOnChip *doc) | |
81 | { | |
82 | void __iomem *docptr = doc->virtadr; | |
83 | unsigned long timeo = jiffies + (HZ * 10); | |
84 | ||
289c0522 | 85 | pr_debug("_DoC_WaitReady called for out-of-line wait\n"); |
1da177e4 LT |
86 | |
87 | /* Out-of-line routine to wait for chip response */ | |
88 | while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
89 | /* issue 2 read from NOP register after reading from CDSNControl register | |
90 | see Software Requirement 11.4 item 2. */ | |
91 | DoC_Delay(doc, 2); | |
92 | ||
93 | if (time_after(jiffies, timeo)) { | |
289c0522 | 94 | pr_debug("_DoC_WaitReady timed out.\n"); |
1da177e4 LT |
95 | return -EIO; |
96 | } | |
97 | udelay(1); | |
98 | cond_resched(); | |
99 | } | |
100 | ||
101 | return 0; | |
102 | } | |
103 | ||
104 | static inline int DoC_WaitReady(struct DiskOnChip *doc) | |
105 | { | |
106 | void __iomem *docptr = doc->virtadr; | |
107 | ||
108 | /* This is inline, to optimise the common case, where it's ready instantly */ | |
109 | int ret = 0; | |
110 | ||
111 | /* 4 read form NOP register should be issued in prior to the read from CDSNControl | |
112 | see Software Requirement 11.4 item 2. */ | |
113 | DoC_Delay(doc, 4); | |
114 | ||
115 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) | |
116 | /* Call the out-of-line routine to wait */ | |
117 | ret = _DoC_WaitReady(doc); | |
118 | ||
119 | /* issue 2 read from NOP register after reading from CDSNControl register | |
120 | see Software Requirement 11.4 item 2. */ | |
121 | DoC_Delay(doc, 2); | |
122 | ||
123 | return ret; | |
124 | } | |
125 | ||
126 | /* DoC_Command: Send a flash command to the flash chip through the CDSN Slow IO register to | |
127 | bypass the internal pipeline. Each of 4 delay cycles (read from the NOP register) is | |
128 | required after writing to CDSN Control register, see Software Requirement 11.4 item 3. */ | |
129 | ||
858119e1 | 130 | static int DoC_Command(struct DiskOnChip *doc, unsigned char command, |
1da177e4 LT |
131 | unsigned char xtraflags) |
132 | { | |
133 | void __iomem *docptr = doc->virtadr; | |
134 | ||
135 | if (DoC_is_2000(doc)) | |
136 | xtraflags |= CDSN_CTRL_FLASH_IO; | |
137 | ||
138 | /* Assert the CLE (Command Latch Enable) line to the flash chip */ | |
139 | WriteDOC(xtraflags | CDSN_CTRL_CLE | CDSN_CTRL_CE, docptr, CDSNControl); | |
140 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
141 | ||
142 | if (DoC_is_Millennium(doc)) | |
143 | WriteDOC(command, docptr, CDSNSlowIO); | |
144 | ||
145 | /* Send the command */ | |
146 | WriteDOC_(command, docptr, doc->ioreg); | |
147 | if (DoC_is_Millennium(doc)) | |
148 | WriteDOC(command, docptr, WritePipeTerm); | |
149 | ||
150 | /* Lower the CLE line */ | |
151 | WriteDOC(xtraflags | CDSN_CTRL_CE, docptr, CDSNControl); | |
152 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
153 | ||
154 | /* Wait for the chip to respond - Software requirement 11.4.1 (extended for any command) */ | |
155 | return DoC_WaitReady(doc); | |
156 | } | |
157 | ||
158 | /* DoC_Address: Set the current address for the flash chip through the CDSN Slow IO register to | |
159 | bypass the internal pipeline. Each of 4 delay cycles (read from the NOP register) is | |
160 | required after writing to CDSN Control register, see Software Requirement 11.4 item 3. */ | |
161 | ||
162 | static int DoC_Address(struct DiskOnChip *doc, int numbytes, unsigned long ofs, | |
163 | unsigned char xtraflags1, unsigned char xtraflags2) | |
164 | { | |
165 | int i; | |
166 | void __iomem *docptr = doc->virtadr; | |
167 | ||
168 | if (DoC_is_2000(doc)) | |
169 | xtraflags1 |= CDSN_CTRL_FLASH_IO; | |
170 | ||
171 | /* Assert the ALE (Address Latch Enable) line to the flash chip */ | |
172 | WriteDOC(xtraflags1 | CDSN_CTRL_ALE | CDSN_CTRL_CE, docptr, CDSNControl); | |
173 | ||
174 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
175 | ||
176 | /* Send the address */ | |
177 | /* Devices with 256-byte page are addressed as: | |
178 | Column (bits 0-7), Page (bits 8-15, 16-23, 24-31) | |
179 | * there is no device on the market with page256 | |
180 | and more than 24 bits. | |
181 | Devices with 512-byte page are addressed as: | |
182 | Column (bits 0-7), Page (bits 9-16, 17-24, 25-31) | |
183 | * 25-31 is sent only if the chip support it. | |
184 | * bit 8 changes the read command to be sent | |
185 | (NAND_CMD_READ0 or NAND_CMD_READ1). | |
186 | */ | |
187 | ||
188 | if (numbytes == ADDR_COLUMN || numbytes == ADDR_COLUMN_PAGE) { | |
189 | if (DoC_is_Millennium(doc)) | |
190 | WriteDOC(ofs & 0xff, docptr, CDSNSlowIO); | |
191 | WriteDOC_(ofs & 0xff, docptr, doc->ioreg); | |
192 | } | |
193 | ||
194 | if (doc->page256) { | |
195 | ofs = ofs >> 8; | |
196 | } else { | |
197 | ofs = ofs >> 9; | |
198 | } | |
199 | ||
200 | if (numbytes == ADDR_PAGE || numbytes == ADDR_COLUMN_PAGE) { | |
201 | for (i = 0; i < doc->pageadrlen; i++, ofs = ofs >> 8) { | |
202 | if (DoC_is_Millennium(doc)) | |
203 | WriteDOC(ofs & 0xff, docptr, CDSNSlowIO); | |
204 | WriteDOC_(ofs & 0xff, docptr, doc->ioreg); | |
205 | } | |
206 | } | |
207 | ||
208 | if (DoC_is_Millennium(doc)) | |
209 | WriteDOC(ofs & 0xff, docptr, WritePipeTerm); | |
210 | ||
211 | DoC_Delay(doc, 2); /* Needed for some slow flash chips. mf. */ | |
e5580fbe TG |
212 | |
213 | /* FIXME: The SlowIO's for millennium could be replaced by | |
1da177e4 LT |
214 | a single WritePipeTerm here. mf. */ |
215 | ||
216 | /* Lower the ALE line */ | |
217 | WriteDOC(xtraflags1 | xtraflags2 | CDSN_CTRL_CE, docptr, | |
218 | CDSNControl); | |
219 | ||
220 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
221 | ||
222 | /* Wait for the chip to respond - Software requirement 11.4.1 */ | |
223 | return DoC_WaitReady(doc); | |
224 | } | |
225 | ||
226 | /* Read a buffer from DoC, taking care of Millennium odditys */ | |
227 | static void DoC_ReadBuf(struct DiskOnChip *doc, u_char * buf, int len) | |
228 | { | |
229 | volatile int dummy; | |
230 | int modulus = 0xffff; | |
231 | void __iomem *docptr = doc->virtadr; | |
232 | int i; | |
233 | ||
234 | if (len <= 0) | |
235 | return; | |
236 | ||
237 | if (DoC_is_Millennium(doc)) { | |
238 | /* Read the data via the internal pipeline through CDSN IO register, | |
239 | see Pipelined Read Operations 11.3 */ | |
240 | dummy = ReadDOC(docptr, ReadPipeInit); | |
241 | ||
242 | /* Millennium should use the LastDataRead register - Pipeline Reads */ | |
243 | len--; | |
244 | ||
245 | /* This is needed for correctly ECC calculation */ | |
246 | modulus = 0xff; | |
247 | } | |
248 | ||
249 | for (i = 0; i < len; i++) | |
250 | buf[i] = ReadDOC_(docptr, doc->ioreg + (i & modulus)); | |
251 | ||
252 | if (DoC_is_Millennium(doc)) { | |
253 | buf[i] = ReadDOC(docptr, LastDataRead); | |
254 | } | |
255 | } | |
256 | ||
257 | /* Write a buffer to DoC, taking care of Millennium odditys */ | |
258 | static void DoC_WriteBuf(struct DiskOnChip *doc, const u_char * buf, int len) | |
259 | { | |
260 | void __iomem *docptr = doc->virtadr; | |
261 | int i; | |
262 | ||
263 | if (len <= 0) | |
264 | return; | |
265 | ||
266 | for (i = 0; i < len; i++) | |
267 | WriteDOC_(buf[i], docptr, doc->ioreg + i); | |
268 | ||
269 | if (DoC_is_Millennium(doc)) { | |
270 | WriteDOC(0x00, docptr, WritePipeTerm); | |
271 | } | |
272 | } | |
273 | ||
274 | ||
275 | /* DoC_SelectChip: Select a given flash chip within the current floor */ | |
276 | ||
277 | static inline int DoC_SelectChip(struct DiskOnChip *doc, int chip) | |
278 | { | |
279 | void __iomem *docptr = doc->virtadr; | |
280 | ||
281 | /* Software requirement 11.4.4 before writing DeviceSelect */ | |
282 | /* Deassert the CE line to eliminate glitches on the FCE# outputs */ | |
283 | WriteDOC(CDSN_CTRL_WP, docptr, CDSNControl); | |
284 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
285 | ||
286 | /* Select the individual flash chip requested */ | |
287 | WriteDOC(chip, docptr, CDSNDeviceSelect); | |
288 | DoC_Delay(doc, 4); | |
289 | ||
290 | /* Reassert the CE line */ | |
291 | WriteDOC(CDSN_CTRL_CE | CDSN_CTRL_FLASH_IO | CDSN_CTRL_WP, docptr, | |
292 | CDSNControl); | |
293 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
294 | ||
295 | /* Wait for it to be ready */ | |
296 | return DoC_WaitReady(doc); | |
297 | } | |
298 | ||
299 | /* DoC_SelectFloor: Select a given floor (bank of flash chips) */ | |
300 | ||
301 | static inline int DoC_SelectFloor(struct DiskOnChip *doc, int floor) | |
302 | { | |
303 | void __iomem *docptr = doc->virtadr; | |
304 | ||
305 | /* Select the floor (bank) of chips required */ | |
306 | WriteDOC(floor, docptr, FloorSelect); | |
307 | ||
308 | /* Wait for the chip to be ready */ | |
309 | return DoC_WaitReady(doc); | |
310 | } | |
311 | ||
312 | /* DoC_IdentChip: Identify a given NAND chip given {floor,chip} */ | |
313 | ||
314 | static int DoC_IdentChip(struct DiskOnChip *doc, int floor, int chip) | |
315 | { | |
316 | int mfr, id, i, j; | |
317 | volatile char dummy; | |
318 | ||
319 | /* Page in the required floor/chip */ | |
320 | DoC_SelectFloor(doc, floor); | |
321 | DoC_SelectChip(doc, chip); | |
322 | ||
323 | /* Reset the chip */ | |
324 | if (DoC_Command(doc, NAND_CMD_RESET, CDSN_CTRL_WP)) { | |
289c0522 | 325 | pr_debug("DoC_Command (reset) for %d,%d returned true\n", |
1da177e4 LT |
326 | floor, chip); |
327 | return 0; | |
328 | } | |
329 | ||
330 | ||
331 | /* Read the NAND chip ID: 1. Send ReadID command */ | |
332 | if (DoC_Command(doc, NAND_CMD_READID, CDSN_CTRL_WP)) { | |
289c0522 | 333 | pr_debug("DoC_Command (ReadID) for %d,%d returned true\n", |
1da177e4 LT |
334 | floor, chip); |
335 | return 0; | |
336 | } | |
337 | ||
338 | /* Read the NAND chip ID: 2. Send address byte zero */ | |
339 | DoC_Address(doc, ADDR_COLUMN, 0, CDSN_CTRL_WP, 0); | |
340 | ||
341 | /* Read the manufacturer and device id codes from the device */ | |
342 | ||
343 | if (DoC_is_Millennium(doc)) { | |
344 | DoC_Delay(doc, 2); | |
345 | dummy = ReadDOC(doc->virtadr, ReadPipeInit); | |
346 | mfr = ReadDOC(doc->virtadr, LastDataRead); | |
347 | ||
348 | DoC_Delay(doc, 2); | |
349 | dummy = ReadDOC(doc->virtadr, ReadPipeInit); | |
350 | id = ReadDOC(doc->virtadr, LastDataRead); | |
351 | } else { | |
352 | /* CDSN Slow IO register see Software Req 11.4 item 5. */ | |
353 | dummy = ReadDOC(doc->virtadr, CDSNSlowIO); | |
354 | DoC_Delay(doc, 2); | |
355 | mfr = ReadDOC_(doc->virtadr, doc->ioreg); | |
356 | ||
357 | /* CDSN Slow IO register see Software Req 11.4 item 5. */ | |
358 | dummy = ReadDOC(doc->virtadr, CDSNSlowIO); | |
359 | DoC_Delay(doc, 2); | |
360 | id = ReadDOC_(doc->virtadr, doc->ioreg); | |
361 | } | |
362 | ||
363 | /* No response - return failure */ | |
364 | if (mfr == 0xff || mfr == 0) | |
365 | return 0; | |
366 | ||
e5580fbe | 367 | /* Check it's the same as the first chip we identified. |
1da177e4 | 368 | * M-Systems say that any given DiskOnChip device should only |
e5580fbe | 369 | * contain _one_ type of flash part, although that's not a |
1da177e4 LT |
370 | * hardware restriction. */ |
371 | if (doc->mfr) { | |
372 | if (doc->mfr == mfr && doc->id == id) | |
a247b5d5 | 373 | return 1; /* This is the same as the first */ |
1da177e4 LT |
374 | else |
375 | printk(KERN_WARNING | |
376 | "Flash chip at floor %d, chip %d is different:\n", | |
377 | floor, chip); | |
378 | } | |
379 | ||
380 | /* Print and store the manufacturer and ID codes. */ | |
381 | for (i = 0; nand_flash_ids[i].name != NULL; i++) { | |
382 | if (id == nand_flash_ids[i].id) { | |
383 | /* Try to identify manufacturer */ | |
384 | for (j = 0; nand_manuf_ids[j].id != 0x0; j++) { | |
385 | if (nand_manuf_ids[j].id == mfr) | |
386 | break; | |
e5580fbe | 387 | } |
1da177e4 LT |
388 | printk(KERN_INFO |
389 | "Flash chip found: Manufacturer ID: %2.2X, " | |
390 | "Chip ID: %2.2X (%s:%s)\n", mfr, id, | |
391 | nand_manuf_ids[j].name, nand_flash_ids[i].name); | |
392 | if (!doc->mfr) { | |
393 | doc->mfr = mfr; | |
394 | doc->id = id; | |
e5580fbe | 395 | doc->chipshift = |
1da177e4 LT |
396 | ffs((nand_flash_ids[i].chipsize << 20)) - 1; |
397 | doc->page256 = (nand_flash_ids[i].pagesize == 256) ? 1 : 0; | |
398 | doc->pageadrlen = doc->chipshift > 25 ? 3 : 2; | |
399 | doc->erasesize = | |
400 | nand_flash_ids[i].erasesize; | |
401 | return 1; | |
402 | } | |
403 | return 0; | |
404 | } | |
405 | } | |
406 | ||
407 | ||
408 | /* We haven't fully identified the chip. Print as much as we know. */ | |
409 | printk(KERN_WARNING "Unknown flash chip found: %2.2X %2.2X\n", | |
410 | id, mfr); | |
411 | ||
412 | printk(KERN_WARNING "Please report to dwmw2@infradead.org\n"); | |
413 | return 0; | |
414 | } | |
415 | ||
416 | /* DoC_ScanChips: Find all NAND chips present in a DiskOnChip, and identify them */ | |
417 | ||
418 | static void DoC_ScanChips(struct DiskOnChip *this, int maxchips) | |
419 | { | |
420 | int floor, chip; | |
421 | int numchips[MAX_FLOORS]; | |
422 | int ret = 1; | |
423 | ||
424 | this->numchips = 0; | |
425 | this->mfr = 0; | |
426 | this->id = 0; | |
427 | ||
428 | /* For each floor, find the number of valid chips it contains */ | |
429 | for (floor = 0; floor < MAX_FLOORS; floor++) { | |
430 | ret = 1; | |
431 | numchips[floor] = 0; | |
432 | for (chip = 0; chip < maxchips && ret != 0; chip++) { | |
433 | ||
434 | ret = DoC_IdentChip(this, floor, chip); | |
435 | if (ret) { | |
436 | numchips[floor]++; | |
437 | this->numchips++; | |
438 | } | |
439 | } | |
440 | } | |
441 | ||
442 | /* If there are none at all that we recognise, bail */ | |
443 | if (!this->numchips) { | |
444 | printk(KERN_NOTICE "No flash chips recognised.\n"); | |
445 | return; | |
446 | } | |
447 | ||
448 | /* Allocate an array to hold the information for each chip */ | |
449 | this->chips = kmalloc(sizeof(struct Nand) * this->numchips, GFP_KERNEL); | |
450 | if (!this->chips) { | |
451 | printk(KERN_NOTICE "No memory for allocating chip info structures\n"); | |
452 | return; | |
453 | } | |
454 | ||
455 | ret = 0; | |
456 | ||
e5580fbe | 457 | /* Fill out the chip array with {floor, chipno} for each |
1da177e4 LT |
458 | * detected chip in the device. */ |
459 | for (floor = 0; floor < MAX_FLOORS; floor++) { | |
460 | for (chip = 0; chip < numchips[floor]; chip++) { | |
461 | this->chips[ret].floor = floor; | |
462 | this->chips[ret].chip = chip; | |
463 | this->chips[ret].curadr = 0; | |
464 | this->chips[ret].curmode = 0x50; | |
465 | ret++; | |
466 | } | |
467 | } | |
468 | ||
469 | /* Calculate and print the total size of the device */ | |
470 | this->totlen = this->numchips * (1 << this->chipshift); | |
471 | ||
472 | printk(KERN_INFO "%d flash chips found. Total DiskOnChip size: %ld MiB\n", | |
473 | this->numchips, this->totlen >> 20); | |
474 | } | |
475 | ||
476 | static int DoC2k_is_alias(struct DiskOnChip *doc1, struct DiskOnChip *doc2) | |
477 | { | |
478 | int tmp1, tmp2, retval; | |
479 | if (doc1->physadr == doc2->physadr) | |
480 | return 1; | |
481 | ||
482 | /* Use the alias resolution register which was set aside for this | |
483 | * purpose. If it's value is the same on both chips, they might | |
484 | * be the same chip, and we write to one and check for a change in | |
485 | * the other. It's unclear if this register is usuable in the | |
486 | * DoC 2000 (it's in the Millennium docs), but it seems to work. */ | |
487 | tmp1 = ReadDOC(doc1->virtadr, AliasResolution); | |
488 | tmp2 = ReadDOC(doc2->virtadr, AliasResolution); | |
489 | if (tmp1 != tmp2) | |
490 | return 0; | |
491 | ||
492 | WriteDOC((tmp1 + 1) % 0xff, doc1->virtadr, AliasResolution); | |
493 | tmp2 = ReadDOC(doc2->virtadr, AliasResolution); | |
494 | if (tmp2 == (tmp1 + 1) % 0xff) | |
495 | retval = 1; | |
496 | else | |
497 | retval = 0; | |
498 | ||
499 | /* Restore register contents. May not be necessary, but do it just to | |
500 | * be safe. */ | |
501 | WriteDOC(tmp1, doc1->virtadr, AliasResolution); | |
502 | ||
503 | return retval; | |
504 | } | |
505 | ||
5e535429 DW |
506 | /* This routine is found from the docprobe code by symbol_get(), |
507 | * which will bump the use count of this module. */ | |
508 | void DoC2k_init(struct mtd_info *mtd) | |
1da177e4 LT |
509 | { |
510 | struct DiskOnChip *this = mtd->priv; | |
511 | struct DiskOnChip *old = NULL; | |
512 | int maxchips; | |
513 | ||
514 | /* We must avoid being called twice for the same device. */ | |
515 | ||
516 | if (doc2klist) | |
517 | old = doc2klist->priv; | |
518 | ||
519 | while (old) { | |
520 | if (DoC2k_is_alias(old, this)) { | |
521 | printk(KERN_NOTICE | |
522 | "Ignoring DiskOnChip 2000 at 0x%lX - already configured\n", | |
523 | this->physadr); | |
524 | iounmap(this->virtadr); | |
525 | kfree(mtd); | |
526 | return; | |
527 | } | |
528 | if (old->nextdoc) | |
529 | old = old->nextdoc->priv; | |
530 | else | |
531 | old = NULL; | |
532 | } | |
533 | ||
534 | ||
535 | switch (this->ChipID) { | |
536 | case DOC_ChipID_Doc2kTSOP: | |
537 | mtd->name = "DiskOnChip 2000 TSOP"; | |
538 | this->ioreg = DoC_Mil_CDSN_IO; | |
539 | /* Pretend it's a Millennium */ | |
540 | this->ChipID = DOC_ChipID_DocMil; | |
541 | maxchips = MAX_CHIPS; | |
542 | break; | |
543 | case DOC_ChipID_Doc2k: | |
544 | mtd->name = "DiskOnChip 2000"; | |
545 | this->ioreg = DoC_2k_CDSN_IO; | |
546 | maxchips = MAX_CHIPS; | |
547 | break; | |
548 | case DOC_ChipID_DocMil: | |
549 | mtd->name = "DiskOnChip Millennium"; | |
550 | this->ioreg = DoC_Mil_CDSN_IO; | |
551 | maxchips = MAX_CHIPS_MIL; | |
552 | break; | |
553 | default: | |
554 | printk("Unknown ChipID 0x%02x\n", this->ChipID); | |
555 | kfree(mtd); | |
556 | iounmap(this->virtadr); | |
557 | return; | |
558 | } | |
559 | ||
560 | printk(KERN_NOTICE "%s found at address 0x%lX\n", mtd->name, | |
561 | this->physadr); | |
562 | ||
563 | mtd->type = MTD_NANDFLASH; | |
564 | mtd->flags = MTD_CAP_NANDFLASH; | |
cd1986a3 | 565 | mtd->writebufsize = mtd->writesize = 512; |
1da177e4 | 566 | mtd->oobsize = 16; |
6a918bad | 567 | mtd->ecc_strength = 2; |
1da177e4 | 568 | mtd->owner = THIS_MODULE; |
3c3c10bb AB |
569 | mtd->_erase = doc_erase; |
570 | mtd->_read = doc_read; | |
571 | mtd->_write = doc_write; | |
572 | mtd->_read_oob = doc_read_oob; | |
573 | mtd->_write_oob = doc_write_oob; | |
1da177e4 LT |
574 | this->curfloor = -1; |
575 | this->curchip = -1; | |
48b19268 | 576 | mutex_init(&this->lock); |
1da177e4 LT |
577 | |
578 | /* Ident all the chips present. */ | |
579 | DoC_ScanChips(this, maxchips); | |
580 | ||
581 | if (!this->totlen) { | |
582 | kfree(mtd); | |
583 | iounmap(this->virtadr); | |
584 | } else { | |
585 | this->nextdoc = doc2klist; | |
586 | doc2klist = mtd; | |
587 | mtd->size = this->totlen; | |
588 | mtd->erasesize = this->erasesize; | |
ee0e87b1 | 589 | mtd_device_register(mtd, NULL, 0); |
1da177e4 LT |
590 | return; |
591 | } | |
592 | } | |
5e535429 | 593 | EXPORT_SYMBOL_GPL(DoC2k_init); |
1da177e4 LT |
594 | |
595 | static int doc_read(struct mtd_info *mtd, loff_t from, size_t len, | |
596 | size_t * retlen, u_char * buf) | |
1da177e4 LT |
597 | { |
598 | struct DiskOnChip *this = mtd->priv; | |
599 | void __iomem *docptr = this->virtadr; | |
600 | struct Nand *mychip; | |
7f8a8940 | 601 | unsigned char syndrome[6], eccbuf[6]; |
1da177e4 LT |
602 | volatile char dummy; |
603 | int i, len256 = 0, ret=0; | |
604 | size_t left = len; | |
605 | ||
48b19268 | 606 | mutex_lock(&this->lock); |
1da177e4 LT |
607 | while (left) { |
608 | len = left; | |
609 | ||
610 | /* Don't allow a single read to cross a 512-byte block boundary */ | |
611 | if (from + len > ((from | 0x1ff) + 1)) | |
612 | len = ((from | 0x1ff) + 1) - from; | |
613 | ||
614 | /* The ECC will not be calculated correctly if less than 512 is read */ | |
53fb84a0 | 615 | if (len != 0x200) |
1da177e4 LT |
616 | printk(KERN_WARNING |
617 | "ECC needs a full sector read (adr: %lx size %lx)\n", | |
618 | (long) from, (long) len); | |
619 | ||
620 | /* printk("DoC_Read (adr: %lx size %lx)\n", (long) from, (long) len); */ | |
621 | ||
622 | ||
623 | /* Find the chip which is to be used and select it */ | |
624 | mychip = &this->chips[from >> (this->chipshift)]; | |
625 | ||
626 | if (this->curfloor != mychip->floor) { | |
627 | DoC_SelectFloor(this, mychip->floor); | |
628 | DoC_SelectChip(this, mychip->chip); | |
629 | } else if (this->curchip != mychip->chip) { | |
630 | DoC_SelectChip(this, mychip->chip); | |
631 | } | |
632 | ||
633 | this->curfloor = mychip->floor; | |
634 | this->curchip = mychip->chip; | |
635 | ||
636 | DoC_Command(this, | |
637 | (!this->page256 | |
638 | && (from & 0x100)) ? NAND_CMD_READ1 : NAND_CMD_READ0, | |
639 | CDSN_CTRL_WP); | |
640 | DoC_Address(this, ADDR_COLUMN_PAGE, from, CDSN_CTRL_WP, | |
641 | CDSN_CTRL_ECC_IO); | |
642 | ||
7f8a8940 TG |
643 | /* Prime the ECC engine */ |
644 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
645 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); | |
1da177e4 LT |
646 | |
647 | /* treat crossing 256-byte sector for 2M x 8bits devices */ | |
648 | if (this->page256 && from + len > (from | 0xff) + 1) { | |
649 | len256 = (from | 0xff) + 1 - from; | |
650 | DoC_ReadBuf(this, buf, len256); | |
651 | ||
652 | DoC_Command(this, NAND_CMD_READ0, CDSN_CTRL_WP); | |
653 | DoC_Address(this, ADDR_COLUMN_PAGE, from + len256, | |
654 | CDSN_CTRL_WP, CDSN_CTRL_ECC_IO); | |
655 | } | |
656 | ||
657 | DoC_ReadBuf(this, &buf[len256], len - len256); | |
658 | ||
659 | /* Let the caller know we completed it */ | |
660 | *retlen += len; | |
661 | ||
7f8a8940 TG |
662 | /* Read the ECC data through the DiskOnChip ECC logic */ |
663 | /* Note: this will work even with 2M x 8bit devices as */ | |
664 | /* they have 8 bytes of OOB per 256 page. mf. */ | |
665 | DoC_ReadBuf(this, eccbuf, 6); | |
666 | ||
667 | /* Flush the pipeline */ | |
668 | if (DoC_is_Millennium(this)) { | |
669 | dummy = ReadDOC(docptr, ECCConf); | |
670 | dummy = ReadDOC(docptr, ECCConf); | |
671 | i = ReadDOC(docptr, ECCConf); | |
672 | } else { | |
673 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
674 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
675 | i = ReadDOC(docptr, 2k_ECCStatus); | |
676 | } | |
1da177e4 | 677 | |
7f8a8940 TG |
678 | /* Check the ECC Status */ |
679 | if (i & 0x80) { | |
680 | int nb_errors; | |
681 | /* There was an ECC error */ | |
1da177e4 | 682 | #ifdef ECC_DEBUG |
7f8a8940 | 683 | printk(KERN_ERR "DiskOnChip ECC Error: Read at %lx\n", (long)from); |
1da177e4 | 684 | #endif |
7854d3f7 | 685 | /* Read the ECC syndrome through the DiskOnChip ECC |
7f8a8940 TG |
686 | logic. These syndrome will be all ZERO when there |
687 | is no error */ | |
688 | for (i = 0; i < 6; i++) { | |
689 | syndrome[i] = | |
690 | ReadDOC(docptr, ECCSyndrome0 + i); | |
691 | } | |
692 | nb_errors = doc_decode_ecc(buf, syndrome); | |
1da177e4 LT |
693 | |
694 | #ifdef ECC_DEBUG | |
7f8a8940 | 695 | printk(KERN_ERR "Errors corrected: %x\n", nb_errors); |
1da177e4 | 696 | #endif |
7f8a8940 TG |
697 | if (nb_errors < 0) { |
698 | /* We return error, but have actually done the | |
699 | read. Not that this can be told to | |
700 | user-space, via sys_read(), but at least | |
701 | MTD-aware stuff can know about it by | |
702 | checking *retlen */ | |
703 | ret = -EIO; | |
1da177e4 | 704 | } |
7f8a8940 | 705 | } |
1da177e4 LT |
706 | |
707 | #ifdef PSYCHO_DEBUG | |
7f8a8940 TG |
708 | printk(KERN_DEBUG "ECC DATA at %lxB: %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", |
709 | (long)from, eccbuf[0], eccbuf[1], eccbuf[2], | |
710 | eccbuf[3], eccbuf[4], eccbuf[5]); | |
1da177e4 | 711 | #endif |
e5580fbe | 712 | |
7f8a8940 TG |
713 | /* disable the ECC engine */ |
714 | WriteDOC(DOC_ECC_DIS, docptr , ECCConf); | |
1da177e4 | 715 | |
e5580fbe | 716 | /* according to 11.4.1, we need to wait for the busy line |
1da177e4 LT |
717 | * drop if we read to the end of the page. */ |
718 | if(0 == ((from + len) & 0x1ff)) | |
719 | { | |
720 | DoC_WaitReady(this); | |
721 | } | |
722 | ||
723 | from += len; | |
724 | left -= len; | |
725 | buf += len; | |
726 | } | |
727 | ||
48b19268 | 728 | mutex_unlock(&this->lock); |
1da177e4 LT |
729 | |
730 | return ret; | |
731 | } | |
732 | ||
733 | static int doc_write(struct mtd_info *mtd, loff_t to, size_t len, | |
734 | size_t * retlen, const u_char * buf) | |
1da177e4 LT |
735 | { |
736 | struct DiskOnChip *this = mtd->priv; | |
737 | int di; /* Yes, DI is a hangover from when I was disassembling the binary driver */ | |
738 | void __iomem *docptr = this->virtadr; | |
7f8a8940 | 739 | unsigned char eccbuf[6]; |
1da177e4 LT |
740 | volatile char dummy; |
741 | int len256 = 0; | |
742 | struct Nand *mychip; | |
743 | size_t left = len; | |
744 | int status; | |
745 | ||
48b19268 | 746 | mutex_lock(&this->lock); |
1da177e4 LT |
747 | while (left) { |
748 | len = left; | |
749 | ||
750 | /* Don't allow a single write to cross a 512-byte block boundary */ | |
751 | if (to + len > ((to | 0x1ff) + 1)) | |
752 | len = ((to | 0x1ff) + 1) - to; | |
753 | ||
754 | /* The ECC will not be calculated correctly if less than 512 is written */ | |
755 | /* DBB- | |
756 | if (len != 0x200 && eccbuf) | |
757 | printk(KERN_WARNING | |
758 | "ECC needs a full sector write (adr: %lx size %lx)\n", | |
759 | (long) to, (long) len); | |
760 | -DBB */ | |
761 | ||
762 | /* printk("DoC_Write (adr: %lx size %lx)\n", (long) to, (long) len); */ | |
763 | ||
764 | /* Find the chip which is to be used and select it */ | |
765 | mychip = &this->chips[to >> (this->chipshift)]; | |
766 | ||
767 | if (this->curfloor != mychip->floor) { | |
768 | DoC_SelectFloor(this, mychip->floor); | |
769 | DoC_SelectChip(this, mychip->chip); | |
770 | } else if (this->curchip != mychip->chip) { | |
771 | DoC_SelectChip(this, mychip->chip); | |
772 | } | |
773 | ||
774 | this->curfloor = mychip->floor; | |
775 | this->curchip = mychip->chip; | |
776 | ||
777 | /* Set device to main plane of flash */ | |
778 | DoC_Command(this, NAND_CMD_RESET, CDSN_CTRL_WP); | |
779 | DoC_Command(this, | |
780 | (!this->page256 | |
781 | && (to & 0x100)) ? NAND_CMD_READ1 : NAND_CMD_READ0, | |
782 | CDSN_CTRL_WP); | |
783 | ||
784 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
785 | DoC_Address(this, ADDR_COLUMN_PAGE, to, 0, CDSN_CTRL_ECC_IO); | |
786 | ||
7f8a8940 TG |
787 | /* Prime the ECC engine */ |
788 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
789 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); | |
1da177e4 LT |
790 | |
791 | /* treat crossing 256-byte sector for 2M x 8bits devices */ | |
792 | if (this->page256 && to + len > (to | 0xff) + 1) { | |
793 | len256 = (to | 0xff) + 1 - to; | |
794 | DoC_WriteBuf(this, buf, len256); | |
795 | ||
796 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
797 | ||
798 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
799 | /* There's an implicit DoC_WaitReady() in DoC_Command */ | |
800 | ||
801 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
802 | DoC_Delay(this, 2); | |
803 | ||
804 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
805 | printk(KERN_ERR "Error programming flash\n"); | |
806 | /* Error in programming */ | |
807 | *retlen = 0; | |
48b19268 | 808 | mutex_unlock(&this->lock); |
1da177e4 LT |
809 | return -EIO; |
810 | } | |
811 | ||
812 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
813 | DoC_Address(this, ADDR_COLUMN_PAGE, to + len256, 0, | |
814 | CDSN_CTRL_ECC_IO); | |
815 | } | |
816 | ||
817 | DoC_WriteBuf(this, &buf[len256], len - len256); | |
818 | ||
7f8a8940 | 819 | WriteDOC(CDSN_CTRL_ECC_IO | CDSN_CTRL_CE, docptr, CDSNControl); |
1da177e4 | 820 | |
7f8a8940 TG |
821 | if (DoC_is_Millennium(this)) { |
822 | WriteDOC(0, docptr, NOP); | |
823 | WriteDOC(0, docptr, NOP); | |
824 | WriteDOC(0, docptr, NOP); | |
825 | } else { | |
826 | WriteDOC_(0, docptr, this->ioreg); | |
827 | WriteDOC_(0, docptr, this->ioreg); | |
828 | WriteDOC_(0, docptr, this->ioreg); | |
829 | } | |
1da177e4 | 830 | |
7f8a8940 TG |
831 | WriteDOC(CDSN_CTRL_ECC_IO | CDSN_CTRL_FLASH_IO | CDSN_CTRL_CE, docptr, |
832 | CDSNControl); | |
833 | ||
834 | /* Read the ECC data through the DiskOnChip ECC logic */ | |
835 | for (di = 0; di < 6; di++) { | |
836 | eccbuf[di] = ReadDOC(docptr, ECCSyndrome0 + di); | |
837 | } | |
1da177e4 | 838 | |
7f8a8940 TG |
839 | /* Reset the ECC engine */ |
840 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
1da177e4 LT |
841 | |
842 | #ifdef PSYCHO_DEBUG | |
7f8a8940 TG |
843 | printk |
844 | ("OOB data at %lx is %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", | |
845 | (long) to, eccbuf[0], eccbuf[1], eccbuf[2], eccbuf[3], | |
846 | eccbuf[4], eccbuf[5]); | |
1da177e4 | 847 | #endif |
1da177e4 LT |
848 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); |
849 | ||
850 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
851 | /* There's an implicit DoC_WaitReady() in DoC_Command */ | |
852 | ||
853 | if (DoC_is_Millennium(this)) { | |
854 | ReadDOC(docptr, ReadPipeInit); | |
855 | status = ReadDOC(docptr, LastDataRead); | |
856 | } else { | |
857 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
858 | DoC_Delay(this, 2); | |
859 | status = ReadDOC_(docptr, this->ioreg); | |
860 | } | |
861 | ||
862 | if (status & 1) { | |
863 | printk(KERN_ERR "Error programming flash\n"); | |
864 | /* Error in programming */ | |
865 | *retlen = 0; | |
48b19268 | 866 | mutex_unlock(&this->lock); |
1da177e4 LT |
867 | return -EIO; |
868 | } | |
869 | ||
870 | /* Let the caller know we completed it */ | |
871 | *retlen += len; | |
e5580fbe | 872 | |
53fb84a0 | 873 | { |
1da177e4 LT |
874 | unsigned char x[8]; |
875 | size_t dummy; | |
876 | int ret; | |
877 | ||
878 | /* Write the ECC data to flash */ | |
879 | for (di=0; di<6; di++) | |
880 | x[di] = eccbuf[di]; | |
e5580fbe | 881 | |
1da177e4 LT |
882 | x[6]=0x55; |
883 | x[7]=0x55; | |
e5580fbe | 884 | |
1da177e4 LT |
885 | ret = doc_write_oob_nolock(mtd, to, 8, &dummy, x); |
886 | if (ret) { | |
48b19268 | 887 | mutex_unlock(&this->lock); |
1da177e4 LT |
888 | return ret; |
889 | } | |
890 | } | |
891 | ||
892 | to += len; | |
893 | left -= len; | |
894 | buf += len; | |
895 | } | |
896 | ||
48b19268 | 897 | mutex_unlock(&this->lock); |
1da177e4 LT |
898 | return 0; |
899 | } | |
900 | ||
8593fbc6 TG |
901 | static int doc_read_oob(struct mtd_info *mtd, loff_t ofs, |
902 | struct mtd_oob_ops *ops) | |
1da177e4 LT |
903 | { |
904 | struct DiskOnChip *this = mtd->priv; | |
905 | int len256 = 0, ret; | |
906 | struct Nand *mychip; | |
8593fbc6 TG |
907 | uint8_t *buf = ops->oobbuf; |
908 | size_t len = ops->len; | |
909 | ||
0612b9dd | 910 | BUG_ON(ops->mode != MTD_OPS_PLACE_OOB); |
8593fbc6 TG |
911 | |
912 | ofs += ops->ooboffs; | |
1da177e4 | 913 | |
48b19268 | 914 | mutex_lock(&this->lock); |
1da177e4 LT |
915 | |
916 | mychip = &this->chips[ofs >> this->chipshift]; | |
917 | ||
918 | if (this->curfloor != mychip->floor) { | |
919 | DoC_SelectFloor(this, mychip->floor); | |
920 | DoC_SelectChip(this, mychip->chip); | |
921 | } else if (this->curchip != mychip->chip) { | |
922 | DoC_SelectChip(this, mychip->chip); | |
923 | } | |
924 | this->curfloor = mychip->floor; | |
925 | this->curchip = mychip->chip; | |
926 | ||
927 | /* update address for 2M x 8bit devices. OOB starts on the second */ | |
928 | /* page to maintain compatibility with doc_read_ecc. */ | |
929 | if (this->page256) { | |
930 | if (!(ofs & 0x8)) | |
931 | ofs += 0x100; | |
932 | else | |
933 | ofs -= 0x8; | |
934 | } | |
935 | ||
936 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
937 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs, CDSN_CTRL_WP, 0); | |
938 | ||
939 | /* treat crossing 8-byte OOB data for 2M x 8bit devices */ | |
940 | /* Note: datasheet says it should automaticaly wrap to the */ | |
941 | /* next OOB block, but it didn't work here. mf. */ | |
942 | if (this->page256 && ofs + len > (ofs | 0x7) + 1) { | |
943 | len256 = (ofs | 0x7) + 1 - ofs; | |
944 | DoC_ReadBuf(this, buf, len256); | |
945 | ||
946 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
947 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs & (~0x1ff), | |
948 | CDSN_CTRL_WP, 0); | |
949 | } | |
950 | ||
951 | DoC_ReadBuf(this, &buf[len256], len - len256); | |
952 | ||
8593fbc6 | 953 | ops->retlen = len; |
1da177e4 LT |
954 | /* Reading the full OOB data drops us off of the end of the page, |
955 | * causing the flash device to go into busy mode, so we need | |
956 | * to wait until ready 11.4.1 and Toshiba TC58256FT docs */ | |
e5580fbe | 957 | |
1da177e4 LT |
958 | ret = DoC_WaitReady(this); |
959 | ||
48b19268 | 960 | mutex_unlock(&this->lock); |
1da177e4 LT |
961 | return ret; |
962 | ||
963 | } | |
964 | ||
965 | static int doc_write_oob_nolock(struct mtd_info *mtd, loff_t ofs, size_t len, | |
966 | size_t * retlen, const u_char * buf) | |
967 | { | |
968 | struct DiskOnChip *this = mtd->priv; | |
969 | int len256 = 0; | |
970 | void __iomem *docptr = this->virtadr; | |
971 | struct Nand *mychip = &this->chips[ofs >> this->chipshift]; | |
972 | volatile int dummy; | |
973 | int status; | |
974 | ||
975 | // printk("doc_write_oob(%lx, %d): %2.2X %2.2X %2.2X %2.2X ... %2.2X %2.2X .. %2.2X %2.2X\n",(long)ofs, len, | |
976 | // buf[0], buf[1], buf[2], buf[3], buf[8], buf[9], buf[14],buf[15]); | |
977 | ||
978 | /* Find the chip which is to be used and select it */ | |
979 | if (this->curfloor != mychip->floor) { | |
980 | DoC_SelectFloor(this, mychip->floor); | |
981 | DoC_SelectChip(this, mychip->chip); | |
982 | } else if (this->curchip != mychip->chip) { | |
983 | DoC_SelectChip(this, mychip->chip); | |
984 | } | |
985 | this->curfloor = mychip->floor; | |
986 | this->curchip = mychip->chip; | |
987 | ||
988 | /* disable the ECC engine */ | |
989 | WriteDOC (DOC_ECC_RESET, docptr, ECCConf); | |
990 | WriteDOC (DOC_ECC_DIS, docptr, ECCConf); | |
991 | ||
992 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
993 | DoC_Command(this, NAND_CMD_RESET, CDSN_CTRL_WP); | |
994 | ||
995 | /* issue the Read2 command to set the pointer to the Spare Data Area. */ | |
996 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
997 | ||
998 | /* update address for 2M x 8bit devices. OOB starts on the second */ | |
999 | /* page to maintain compatibility with doc_read_ecc. */ | |
1000 | if (this->page256) { | |
1001 | if (!(ofs & 0x8)) | |
1002 | ofs += 0x100; | |
1003 | else | |
1004 | ofs -= 0x8; | |
1005 | } | |
1006 | ||
1007 | /* issue the Serial Data In command to initial the Page Program process */ | |
1008 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1009 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs, 0, 0); | |
1010 | ||
1011 | /* treat crossing 8-byte OOB data for 2M x 8bit devices */ | |
1012 | /* Note: datasheet says it should automaticaly wrap to the */ | |
1013 | /* next OOB block, but it didn't work here. mf. */ | |
1014 | if (this->page256 && ofs + len > (ofs | 0x7) + 1) { | |
1015 | len256 = (ofs | 0x7) + 1 - ofs; | |
1016 | DoC_WriteBuf(this, buf, len256); | |
1017 | ||
1018 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1019 | DoC_Command(this, NAND_CMD_STATUS, 0); | |
1020 | /* DoC_WaitReady() is implicit in DoC_Command */ | |
1021 | ||
1022 | if (DoC_is_Millennium(this)) { | |
1023 | ReadDOC(docptr, ReadPipeInit); | |
1024 | status = ReadDOC(docptr, LastDataRead); | |
1025 | } else { | |
1026 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1027 | DoC_Delay(this, 2); | |
1028 | status = ReadDOC_(docptr, this->ioreg); | |
1029 | } | |
1030 | ||
1031 | if (status & 1) { | |
1032 | printk(KERN_ERR "Error programming oob data\n"); | |
1033 | /* There was an error */ | |
1034 | *retlen = 0; | |
1035 | return -EIO; | |
1036 | } | |
1037 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1038 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs & (~0x1ff), 0, 0); | |
1039 | } | |
1040 | ||
1041 | DoC_WriteBuf(this, &buf[len256], len - len256); | |
1042 | ||
1043 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1044 | DoC_Command(this, NAND_CMD_STATUS, 0); | |
1045 | /* DoC_WaitReady() is implicit in DoC_Command */ | |
1046 | ||
1047 | if (DoC_is_Millennium(this)) { | |
1048 | ReadDOC(docptr, ReadPipeInit); | |
1049 | status = ReadDOC(docptr, LastDataRead); | |
1050 | } else { | |
1051 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1052 | DoC_Delay(this, 2); | |
1053 | status = ReadDOC_(docptr, this->ioreg); | |
1054 | } | |
1055 | ||
1056 | if (status & 1) { | |
1057 | printk(KERN_ERR "Error programming oob data\n"); | |
1058 | /* There was an error */ | |
1059 | *retlen = 0; | |
1060 | return -EIO; | |
1061 | } | |
1062 | ||
1063 | *retlen = len; | |
1064 | return 0; | |
1065 | ||
1066 | } | |
e5580fbe | 1067 | |
8593fbc6 TG |
1068 | static int doc_write_oob(struct mtd_info *mtd, loff_t ofs, |
1069 | struct mtd_oob_ops *ops) | |
1da177e4 | 1070 | { |
8593fbc6 TG |
1071 | struct DiskOnChip *this = mtd->priv; |
1072 | int ret; | |
1da177e4 | 1073 | |
0612b9dd | 1074 | BUG_ON(ops->mode != MTD_OPS_PLACE_OOB); |
1da177e4 | 1075 | |
8593fbc6 TG |
1076 | mutex_lock(&this->lock); |
1077 | ret = doc_write_oob_nolock(mtd, ofs + ops->ooboffs, ops->len, | |
1078 | &ops->retlen, ops->oobbuf); | |
1079 | ||
1080 | mutex_unlock(&this->lock); | |
1081 | return ret; | |
1da177e4 LT |
1082 | } |
1083 | ||
1084 | static int doc_erase(struct mtd_info *mtd, struct erase_info *instr) | |
1085 | { | |
1086 | struct DiskOnChip *this = mtd->priv; | |
1087 | __u32 ofs = instr->addr; | |
1088 | __u32 len = instr->len; | |
1089 | volatile int dummy; | |
1090 | void __iomem *docptr = this->virtadr; | |
1091 | struct Nand *mychip; | |
1092 | int status; | |
1093 | ||
48b19268 | 1094 | mutex_lock(&this->lock); |
1da177e4 LT |
1095 | |
1096 | if (ofs & (mtd->erasesize-1) || len & (mtd->erasesize-1)) { | |
48b19268 | 1097 | mutex_unlock(&this->lock); |
1da177e4 LT |
1098 | return -EINVAL; |
1099 | } | |
1100 | ||
1101 | instr->state = MTD_ERASING; | |
e5580fbe | 1102 | |
1da177e4 LT |
1103 | /* FIXME: Do this in the background. Use timers or schedule_task() */ |
1104 | while(len) { | |
1105 | mychip = &this->chips[ofs >> this->chipshift]; | |
1106 | ||
1107 | if (this->curfloor != mychip->floor) { | |
1108 | DoC_SelectFloor(this, mychip->floor); | |
1109 | DoC_SelectChip(this, mychip->chip); | |
1110 | } else if (this->curchip != mychip->chip) { | |
1111 | DoC_SelectChip(this, mychip->chip); | |
1112 | } | |
1113 | this->curfloor = mychip->floor; | |
1114 | this->curchip = mychip->chip; | |
1115 | ||
1116 | DoC_Command(this, NAND_CMD_ERASE1, 0); | |
1117 | DoC_Address(this, ADDR_PAGE, ofs, 0, 0); | |
1118 | DoC_Command(this, NAND_CMD_ERASE2, 0); | |
1119 | ||
1120 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
1121 | ||
1122 | if (DoC_is_Millennium(this)) { | |
1123 | ReadDOC(docptr, ReadPipeInit); | |
1124 | status = ReadDOC(docptr, LastDataRead); | |
1125 | } else { | |
1126 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1127 | DoC_Delay(this, 2); | |
1128 | status = ReadDOC_(docptr, this->ioreg); | |
1129 | } | |
1130 | ||
1131 | if (status & 1) { | |
1132 | printk(KERN_ERR "Error erasing at 0x%x\n", ofs); | |
1133 | /* There was an error */ | |
1134 | instr->state = MTD_ERASE_FAILED; | |
1135 | goto callback; | |
1136 | } | |
1137 | ofs += mtd->erasesize; | |
1138 | len -= mtd->erasesize; | |
1139 | } | |
1140 | instr->state = MTD_ERASE_DONE; | |
1141 | ||
1142 | callback: | |
1143 | mtd_erase_callback(instr); | |
1144 | ||
48b19268 | 1145 | mutex_unlock(&this->lock); |
1da177e4 LT |
1146 | return 0; |
1147 | } | |
1148 | ||
1149 | ||
1150 | /**************************************************************************** | |
1151 | * | |
1152 | * Module stuff | |
1153 | * | |
1154 | ****************************************************************************/ | |
1155 | ||
1da177e4 LT |
1156 | static void __exit cleanup_doc2000(void) |
1157 | { | |
1158 | struct mtd_info *mtd; | |
1159 | struct DiskOnChip *this; | |
1160 | ||
1161 | while ((mtd = doc2klist)) { | |
1162 | this = mtd->priv; | |
1163 | doc2klist = this->nextdoc; | |
1164 | ||
ee0e87b1 | 1165 | mtd_device_unregister(mtd); |
1da177e4 LT |
1166 | |
1167 | iounmap(this->virtadr); | |
1168 | kfree(this->chips); | |
1169 | kfree(mtd); | |
1170 | } | |
1da177e4 LT |
1171 | } |
1172 | ||
1173 | module_exit(cleanup_doc2000); | |
1da177e4 LT |
1174 | |
1175 | MODULE_LICENSE("GPL"); | |
1176 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org> et al."); | |
1177 | MODULE_DESCRIPTION("MTD driver for DiskOnChip 2000 and Millennium"); | |
1178 |