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1 | /* | |
2 | * linux/drivers/mtd/onenand/onenand_base.c | |
3 | * | |
4 | * Copyright (C) 2005-2006 Samsung Electronics | |
5 | * Kyungmin Park <kyungmin.park@samsung.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
12 | #include <linux/kernel.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/sched.h> | |
16 | #include <linux/interrupt.h> | |
17 | #include <linux/jiffies.h> | |
18 | #include <linux/mtd/mtd.h> | |
19 | #include <linux/mtd/onenand.h> | |
20 | #include <linux/mtd/partitions.h> | |
21 | ||
22 | #include <asm/io.h> | |
23 | ||
24 | /** | |
25 | * onenand_oob_64 - oob info for large (2KB) page | |
26 | */ | |
27 | static struct nand_ecclayout onenand_oob_64 = { | |
28 | .eccbytes = 20, | |
29 | .eccpos = { | |
30 | 8, 9, 10, 11, 12, | |
31 | 24, 25, 26, 27, 28, | |
32 | 40, 41, 42, 43, 44, | |
33 | 56, 57, 58, 59, 60, | |
34 | }, | |
35 | .oobfree = { | |
36 | {2, 3}, {14, 2}, {18, 3}, {30, 2}, | |
37 | {34, 3}, {46, 2}, {50, 3}, {62, 2} | |
38 | } | |
39 | }; | |
40 | ||
41 | /** | |
42 | * onenand_oob_32 - oob info for middle (1KB) page | |
43 | */ | |
44 | static struct nand_ecclayout onenand_oob_32 = { | |
45 | .eccbytes = 10, | |
46 | .eccpos = { | |
47 | 8, 9, 10, 11, 12, | |
48 | 24, 25, 26, 27, 28, | |
49 | }, | |
50 | .oobfree = { {2, 3}, {14, 2}, {18, 3}, {30, 2} } | |
51 | }; | |
52 | ||
53 | static const unsigned char ffchars[] = { | |
54 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
55 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 16 */ | |
56 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
57 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 32 */ | |
58 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
59 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 48 */ | |
60 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
61 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 64 */ | |
62 | }; | |
63 | ||
64 | /** | |
65 | * onenand_readw - [OneNAND Interface] Read OneNAND register | |
66 | * @param addr address to read | |
67 | * | |
68 | * Read OneNAND register | |
69 | */ | |
70 | static unsigned short onenand_readw(void __iomem *addr) | |
71 | { | |
72 | return readw(addr); | |
73 | } | |
74 | ||
75 | /** | |
76 | * onenand_writew - [OneNAND Interface] Write OneNAND register with value | |
77 | * @param value value to write | |
78 | * @param addr address to write | |
79 | * | |
80 | * Write OneNAND register with value | |
81 | */ | |
82 | static void onenand_writew(unsigned short value, void __iomem *addr) | |
83 | { | |
84 | writew(value, addr); | |
85 | } | |
86 | ||
87 | /** | |
88 | * onenand_block_address - [DEFAULT] Get block address | |
89 | * @param this onenand chip data structure | |
90 | * @param block the block | |
91 | * @return translated block address if DDP, otherwise same | |
92 | * | |
93 | * Setup Start Address 1 Register (F100h) | |
94 | */ | |
95 | static int onenand_block_address(struct onenand_chip *this, int block) | |
96 | { | |
97 | if (this->device_id & ONENAND_DEVICE_IS_DDP) { | |
98 | /* Device Flash Core select, NAND Flash Block Address */ | |
99 | int dfs = 0; | |
100 | ||
101 | if (block & this->density_mask) | |
102 | dfs = 1; | |
103 | ||
104 | return (dfs << ONENAND_DDP_SHIFT) | | |
105 | (block & (this->density_mask - 1)); | |
106 | } | |
107 | ||
108 | return block; | |
109 | } | |
110 | ||
111 | /** | |
112 | * onenand_bufferram_address - [DEFAULT] Get bufferram address | |
113 | * @param this onenand chip data structure | |
114 | * @param block the block | |
115 | * @return set DBS value if DDP, otherwise 0 | |
116 | * | |
117 | * Setup Start Address 2 Register (F101h) for DDP | |
118 | */ | |
119 | static int onenand_bufferram_address(struct onenand_chip *this, int block) | |
120 | { | |
121 | if (this->device_id & ONENAND_DEVICE_IS_DDP) { | |
122 | /* Device BufferRAM Select */ | |
123 | int dbs = 0; | |
124 | ||
125 | if (block & this->density_mask) | |
126 | dbs = 1; | |
127 | ||
128 | return (dbs << ONENAND_DDP_SHIFT); | |
129 | } | |
130 | ||
131 | return 0; | |
132 | } | |
133 | ||
134 | /** | |
135 | * onenand_page_address - [DEFAULT] Get page address | |
136 | * @param page the page address | |
137 | * @param sector the sector address | |
138 | * @return combined page and sector address | |
139 | * | |
140 | * Setup Start Address 8 Register (F107h) | |
141 | */ | |
142 | static int onenand_page_address(int page, int sector) | |
143 | { | |
144 | /* Flash Page Address, Flash Sector Address */ | |
145 | int fpa, fsa; | |
146 | ||
147 | fpa = page & ONENAND_FPA_MASK; | |
148 | fsa = sector & ONENAND_FSA_MASK; | |
149 | ||
150 | return ((fpa << ONENAND_FPA_SHIFT) | fsa); | |
151 | } | |
152 | ||
153 | /** | |
154 | * onenand_buffer_address - [DEFAULT] Get buffer address | |
155 | * @param dataram1 DataRAM index | |
156 | * @param sectors the sector address | |
157 | * @param count the number of sectors | |
158 | * @return the start buffer value | |
159 | * | |
160 | * Setup Start Buffer Register (F200h) | |
161 | */ | |
162 | static int onenand_buffer_address(int dataram1, int sectors, int count) | |
163 | { | |
164 | int bsa, bsc; | |
165 | ||
166 | /* BufferRAM Sector Address */ | |
167 | bsa = sectors & ONENAND_BSA_MASK; | |
168 | ||
169 | if (dataram1) | |
170 | bsa |= ONENAND_BSA_DATARAM1; /* DataRAM1 */ | |
171 | else | |
172 | bsa |= ONENAND_BSA_DATARAM0; /* DataRAM0 */ | |
173 | ||
174 | /* BufferRAM Sector Count */ | |
175 | bsc = count & ONENAND_BSC_MASK; | |
176 | ||
177 | return ((bsa << ONENAND_BSA_SHIFT) | bsc); | |
178 | } | |
179 | ||
180 | /** | |
181 | * onenand_command - [DEFAULT] Send command to OneNAND device | |
182 | * @param mtd MTD device structure | |
183 | * @param cmd the command to be sent | |
184 | * @param addr offset to read from or write to | |
185 | * @param len number of bytes to read or write | |
186 | * | |
187 | * Send command to OneNAND device. This function is used for middle/large page | |
188 | * devices (1KB/2KB Bytes per page) | |
189 | */ | |
190 | static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t len) | |
191 | { | |
192 | struct onenand_chip *this = mtd->priv; | |
193 | int value, readcmd = 0, block_cmd = 0; | |
194 | int block, page; | |
195 | /* Now we use page size operation */ | |
196 | int sectors = 4, count = 4; | |
197 | ||
198 | /* Address translation */ | |
199 | switch (cmd) { | |
200 | case ONENAND_CMD_UNLOCK: | |
201 | case ONENAND_CMD_LOCK: | |
202 | case ONENAND_CMD_LOCK_TIGHT: | |
203 | case ONENAND_CMD_UNLOCK_ALL: | |
204 | block = -1; | |
205 | page = -1; | |
206 | break; | |
207 | ||
208 | case ONENAND_CMD_ERASE: | |
209 | case ONENAND_CMD_BUFFERRAM: | |
210 | case ONENAND_CMD_OTP_ACCESS: | |
211 | block_cmd = 1; | |
212 | block = (int) (addr >> this->erase_shift); | |
213 | page = -1; | |
214 | break; | |
215 | ||
216 | default: | |
217 | block = (int) (addr >> this->erase_shift); | |
218 | page = (int) (addr >> this->page_shift); | |
219 | page &= this->page_mask; | |
220 | break; | |
221 | } | |
222 | ||
223 | /* NOTE: The setting order of the registers is very important! */ | |
224 | if (cmd == ONENAND_CMD_BUFFERRAM) { | |
225 | /* Select DataRAM for DDP */ | |
226 | value = onenand_bufferram_address(this, block); | |
227 | this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2); | |
228 | ||
229 | /* Switch to the next data buffer */ | |
230 | ONENAND_SET_NEXT_BUFFERRAM(this); | |
231 | ||
232 | return 0; | |
233 | } | |
234 | ||
235 | if (block != -1) { | |
236 | /* Write 'DFS, FBA' of Flash */ | |
237 | value = onenand_block_address(this, block); | |
238 | this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1); | |
239 | ||
240 | if (block_cmd) { | |
241 | /* Select DataRAM for DDP */ | |
242 | value = onenand_bufferram_address(this, block); | |
243 | this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2); | |
244 | } | |
245 | } | |
246 | ||
247 | if (page != -1) { | |
248 | int dataram; | |
249 | ||
250 | switch (cmd) { | |
251 | case ONENAND_CMD_READ: | |
252 | case ONENAND_CMD_READOOB: | |
253 | dataram = ONENAND_SET_NEXT_BUFFERRAM(this); | |
254 | readcmd = 1; | |
255 | break; | |
256 | ||
257 | default: | |
258 | dataram = ONENAND_CURRENT_BUFFERRAM(this); | |
259 | break; | |
260 | } | |
261 | ||
262 | /* Write 'FPA, FSA' of Flash */ | |
263 | value = onenand_page_address(page, sectors); | |
264 | this->write_word(value, this->base + ONENAND_REG_START_ADDRESS8); | |
265 | ||
266 | /* Write 'BSA, BSC' of DataRAM */ | |
267 | value = onenand_buffer_address(dataram, sectors, count); | |
268 | this->write_word(value, this->base + ONENAND_REG_START_BUFFER); | |
269 | ||
270 | if (readcmd) { | |
271 | /* Select DataRAM for DDP */ | |
272 | value = onenand_bufferram_address(this, block); | |
273 | this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2); | |
274 | } | |
275 | } | |
276 | ||
277 | /* Interrupt clear */ | |
278 | this->write_word(ONENAND_INT_CLEAR, this->base + ONENAND_REG_INTERRUPT); | |
279 | ||
280 | /* Write command */ | |
281 | this->write_word(cmd, this->base + ONENAND_REG_COMMAND); | |
282 | ||
283 | return 0; | |
284 | } | |
285 | ||
286 | /** | |
287 | * onenand_wait - [DEFAULT] wait until the command is done | |
288 | * @param mtd MTD device structure | |
289 | * @param state state to select the max. timeout value | |
290 | * | |
291 | * Wait for command done. This applies to all OneNAND command | |
292 | * Read can take up to 30us, erase up to 2ms and program up to 350us | |
293 | * according to general OneNAND specs | |
294 | */ | |
295 | static int onenand_wait(struct mtd_info *mtd, int state) | |
296 | { | |
297 | struct onenand_chip * this = mtd->priv; | |
298 | unsigned long timeout; | |
299 | unsigned int flags = ONENAND_INT_MASTER; | |
300 | unsigned int interrupt = 0; | |
301 | unsigned int ctrl, ecc; | |
302 | ||
303 | /* The 20 msec is enough */ | |
304 | timeout = jiffies + msecs_to_jiffies(20); | |
305 | while (time_before(jiffies, timeout)) { | |
306 | interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT); | |
307 | ||
308 | if (interrupt & flags) | |
309 | break; | |
310 | ||
311 | if (state != FL_READING) | |
312 | cond_resched(); | |
313 | touch_softlockup_watchdog(); | |
314 | } | |
315 | /* To get correct interrupt status in timeout case */ | |
316 | interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT); | |
317 | ||
318 | ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS); | |
319 | ||
320 | if (ctrl & ONENAND_CTRL_ERROR) { | |
321 | /* It maybe occur at initial bad block */ | |
322 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: controller error = 0x%04x\n", ctrl); | |
323 | /* Clear other interrupt bits for preventing ECC error */ | |
324 | interrupt &= ONENAND_INT_MASTER; | |
325 | } | |
326 | ||
327 | if (ctrl & ONENAND_CTRL_LOCK) { | |
328 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: it's locked error = 0x%04x\n", ctrl); | |
329 | return -EACCES; | |
330 | } | |
331 | ||
332 | if (interrupt & ONENAND_INT_READ) { | |
333 | ecc = this->read_word(this->base + ONENAND_REG_ECC_STATUS); | |
334 | if (ecc) { | |
335 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: ECC error = 0x%04x\n", ecc); | |
336 | if (ecc & ONENAND_ECC_2BIT_ALL) | |
337 | mtd->ecc_stats.failed++; | |
338 | else if (ecc & ONENAND_ECC_1BIT_ALL) | |
339 | mtd->ecc_stats.corrected++; | |
340 | } | |
341 | } | |
342 | ||
343 | return 0; | |
344 | } | |
345 | ||
346 | /* | |
347 | * onenand_interrupt - [DEFAULT] onenand interrupt handler | |
348 | * @param irq onenand interrupt number | |
349 | * @param dev_id interrupt data | |
350 | * | |
351 | * complete the work | |
352 | */ | |
353 | static irqreturn_t onenand_interrupt(int irq, void *data) | |
354 | { | |
355 | struct onenand_chip *this = (struct onenand_chip *) data; | |
356 | ||
357 | /* To handle shared interrupt */ | |
358 | if (!this->complete.done) | |
359 | complete(&this->complete); | |
360 | ||
361 | return IRQ_HANDLED; | |
362 | } | |
363 | ||
364 | /* | |
365 | * onenand_interrupt_wait - [DEFAULT] wait until the command is done | |
366 | * @param mtd MTD device structure | |
367 | * @param state state to select the max. timeout value | |
368 | * | |
369 | * Wait for command done. | |
370 | */ | |
371 | static int onenand_interrupt_wait(struct mtd_info *mtd, int state) | |
372 | { | |
373 | struct onenand_chip *this = mtd->priv; | |
374 | ||
375 | /* To prevent soft lockup */ | |
376 | touch_softlockup_watchdog(); | |
377 | ||
378 | wait_for_completion(&this->complete); | |
379 | ||
380 | return onenand_wait(mtd, state); | |
381 | } | |
382 | ||
383 | /* | |
384 | * onenand_try_interrupt_wait - [DEFAULT] try interrupt wait | |
385 | * @param mtd MTD device structure | |
386 | * @param state state to select the max. timeout value | |
387 | * | |
388 | * Try interrupt based wait (It is used one-time) | |
389 | */ | |
390 | static int onenand_try_interrupt_wait(struct mtd_info *mtd, int state) | |
391 | { | |
392 | struct onenand_chip *this = mtd->priv; | |
393 | unsigned long remain, timeout; | |
394 | ||
395 | /* We use interrupt wait first */ | |
396 | this->wait = onenand_interrupt_wait; | |
397 | ||
398 | /* To prevent soft lockup */ | |
399 | touch_softlockup_watchdog(); | |
400 | ||
401 | timeout = msecs_to_jiffies(100); | |
402 | remain = wait_for_completion_timeout(&this->complete, timeout); | |
403 | if (!remain) { | |
404 | printk(KERN_INFO "OneNAND: There's no interrupt. " | |
405 | "We use the normal wait\n"); | |
406 | ||
407 | /* Release the irq */ | |
408 | free_irq(this->irq, this); | |
409 | ||
410 | this->wait = onenand_wait; | |
411 | } | |
412 | ||
413 | return onenand_wait(mtd, state); | |
414 | } | |
415 | ||
416 | /* | |
417 | * onenand_setup_wait - [OneNAND Interface] setup onenand wait method | |
418 | * @param mtd MTD device structure | |
419 | * | |
420 | * There's two method to wait onenand work | |
421 | * 1. polling - read interrupt status register | |
422 | * 2. interrupt - use the kernel interrupt method | |
423 | */ | |
424 | static void onenand_setup_wait(struct mtd_info *mtd) | |
425 | { | |
426 | struct onenand_chip *this = mtd->priv; | |
427 | int syscfg; | |
428 | ||
429 | init_completion(&this->complete); | |
430 | ||
431 | if (this->irq <= 0) { | |
432 | this->wait = onenand_wait; | |
433 | return; | |
434 | } | |
435 | ||
436 | if (request_irq(this->irq, &onenand_interrupt, | |
437 | IRQF_SHARED, "onenand", this)) { | |
438 | /* If we can't get irq, use the normal wait */ | |
439 | this->wait = onenand_wait; | |
440 | return; | |
441 | } | |
442 | ||
443 | /* Enable interrupt */ | |
444 | syscfg = this->read_word(this->base + ONENAND_REG_SYS_CFG1); | |
445 | syscfg |= ONENAND_SYS_CFG1_IOBE; | |
446 | this->write_word(syscfg, this->base + ONENAND_REG_SYS_CFG1); | |
447 | ||
448 | this->wait = onenand_try_interrupt_wait; | |
449 | } | |
450 | ||
451 | /** | |
452 | * onenand_bufferram_offset - [DEFAULT] BufferRAM offset | |
453 | * @param mtd MTD data structure | |
454 | * @param area BufferRAM area | |
455 | * @return offset given area | |
456 | * | |
457 | * Return BufferRAM offset given area | |
458 | */ | |
459 | static inline int onenand_bufferram_offset(struct mtd_info *mtd, int area) | |
460 | { | |
461 | struct onenand_chip *this = mtd->priv; | |
462 | ||
463 | if (ONENAND_CURRENT_BUFFERRAM(this)) { | |
464 | if (area == ONENAND_DATARAM) | |
465 | return mtd->writesize; | |
466 | if (area == ONENAND_SPARERAM) | |
467 | return mtd->oobsize; | |
468 | } | |
469 | ||
470 | return 0; | |
471 | } | |
472 | ||
473 | /** | |
474 | * onenand_read_bufferram - [OneNAND Interface] Read the bufferram area | |
475 | * @param mtd MTD data structure | |
476 | * @param area BufferRAM area | |
477 | * @param buffer the databuffer to put/get data | |
478 | * @param offset offset to read from or write to | |
479 | * @param count number of bytes to read/write | |
480 | * | |
481 | * Read the BufferRAM area | |
482 | */ | |
483 | static int onenand_read_bufferram(struct mtd_info *mtd, int area, | |
484 | unsigned char *buffer, int offset, size_t count) | |
485 | { | |
486 | struct onenand_chip *this = mtd->priv; | |
487 | void __iomem *bufferram; | |
488 | ||
489 | bufferram = this->base + area; | |
490 | ||
491 | bufferram += onenand_bufferram_offset(mtd, area); | |
492 | ||
493 | if (ONENAND_CHECK_BYTE_ACCESS(count)) { | |
494 | unsigned short word; | |
495 | ||
496 | /* Align with word(16-bit) size */ | |
497 | count--; | |
498 | ||
499 | /* Read word and save byte */ | |
500 | word = this->read_word(bufferram + offset + count); | |
501 | buffer[count] = (word & 0xff); | |
502 | } | |
503 | ||
504 | memcpy(buffer, bufferram + offset, count); | |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
509 | /** | |
510 | * onenand_sync_read_bufferram - [OneNAND Interface] Read the bufferram area with Sync. Burst mode | |
511 | * @param mtd MTD data structure | |
512 | * @param area BufferRAM area | |
513 | * @param buffer the databuffer to put/get data | |
514 | * @param offset offset to read from or write to | |
515 | * @param count number of bytes to read/write | |
516 | * | |
517 | * Read the BufferRAM area with Sync. Burst Mode | |
518 | */ | |
519 | static int onenand_sync_read_bufferram(struct mtd_info *mtd, int area, | |
520 | unsigned char *buffer, int offset, size_t count) | |
521 | { | |
522 | struct onenand_chip *this = mtd->priv; | |
523 | void __iomem *bufferram; | |
524 | ||
525 | bufferram = this->base + area; | |
526 | ||
527 | bufferram += onenand_bufferram_offset(mtd, area); | |
528 | ||
529 | this->mmcontrol(mtd, ONENAND_SYS_CFG1_SYNC_READ); | |
530 | ||
531 | if (ONENAND_CHECK_BYTE_ACCESS(count)) { | |
532 | unsigned short word; | |
533 | ||
534 | /* Align with word(16-bit) size */ | |
535 | count--; | |
536 | ||
537 | /* Read word and save byte */ | |
538 | word = this->read_word(bufferram + offset + count); | |
539 | buffer[count] = (word & 0xff); | |
540 | } | |
541 | ||
542 | memcpy(buffer, bufferram + offset, count); | |
543 | ||
544 | this->mmcontrol(mtd, 0); | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
549 | /** | |
550 | * onenand_write_bufferram - [OneNAND Interface] Write the bufferram area | |
551 | * @param mtd MTD data structure | |
552 | * @param area BufferRAM area | |
553 | * @param buffer the databuffer to put/get data | |
554 | * @param offset offset to read from or write to | |
555 | * @param count number of bytes to read/write | |
556 | * | |
557 | * Write the BufferRAM area | |
558 | */ | |
559 | static int onenand_write_bufferram(struct mtd_info *mtd, int area, | |
560 | const unsigned char *buffer, int offset, size_t count) | |
561 | { | |
562 | struct onenand_chip *this = mtd->priv; | |
563 | void __iomem *bufferram; | |
564 | ||
565 | bufferram = this->base + area; | |
566 | ||
567 | bufferram += onenand_bufferram_offset(mtd, area); | |
568 | ||
569 | if (ONENAND_CHECK_BYTE_ACCESS(count)) { | |
570 | unsigned short word; | |
571 | int byte_offset; | |
572 | ||
573 | /* Align with word(16-bit) size */ | |
574 | count--; | |
575 | ||
576 | /* Calculate byte access offset */ | |
577 | byte_offset = offset + count; | |
578 | ||
579 | /* Read word and save byte */ | |
580 | word = this->read_word(bufferram + byte_offset); | |
581 | word = (word & ~0xff) | buffer[count]; | |
582 | this->write_word(word, bufferram + byte_offset); | |
583 | } | |
584 | ||
585 | memcpy(bufferram + offset, buffer, count); | |
586 | ||
587 | return 0; | |
588 | } | |
589 | ||
590 | /** | |
591 | * onenand_check_bufferram - [GENERIC] Check BufferRAM information | |
592 | * @param mtd MTD data structure | |
593 | * @param addr address to check | |
594 | * @return 1 if there are valid data, otherwise 0 | |
595 | * | |
596 | * Check bufferram if there is data we required | |
597 | */ | |
598 | static int onenand_check_bufferram(struct mtd_info *mtd, loff_t addr) | |
599 | { | |
600 | struct onenand_chip *this = mtd->priv; | |
601 | int block, page; | |
602 | int i; | |
603 | ||
604 | block = (int) (addr >> this->erase_shift); | |
605 | page = (int) (addr >> this->page_shift); | |
606 | page &= this->page_mask; | |
607 | ||
608 | i = ONENAND_CURRENT_BUFFERRAM(this); | |
609 | ||
610 | /* Is there valid data? */ | |
611 | if (this->bufferram[i].block == block && | |
612 | this->bufferram[i].page == page && | |
613 | this->bufferram[i].valid) | |
614 | return 1; | |
615 | ||
616 | return 0; | |
617 | } | |
618 | ||
619 | /** | |
620 | * onenand_update_bufferram - [GENERIC] Update BufferRAM information | |
621 | * @param mtd MTD data structure | |
622 | * @param addr address to update | |
623 | * @param valid valid flag | |
624 | * | |
625 | * Update BufferRAM information | |
626 | */ | |
627 | static int onenand_update_bufferram(struct mtd_info *mtd, loff_t addr, | |
628 | int valid) | |
629 | { | |
630 | struct onenand_chip *this = mtd->priv; | |
631 | int block, page; | |
632 | int i; | |
633 | ||
634 | block = (int) (addr >> this->erase_shift); | |
635 | page = (int) (addr >> this->page_shift); | |
636 | page &= this->page_mask; | |
637 | ||
638 | /* Invalidate BufferRAM */ | |
639 | for (i = 0; i < MAX_BUFFERRAM; i++) { | |
640 | if (this->bufferram[i].block == block && | |
641 | this->bufferram[i].page == page) | |
642 | this->bufferram[i].valid = 0; | |
643 | } | |
644 | ||
645 | /* Update BufferRAM */ | |
646 | i = ONENAND_CURRENT_BUFFERRAM(this); | |
647 | this->bufferram[i].block = block; | |
648 | this->bufferram[i].page = page; | |
649 | this->bufferram[i].valid = valid; | |
650 | ||
651 | return 0; | |
652 | } | |
653 | ||
654 | /** | |
655 | * onenand_get_device - [GENERIC] Get chip for selected access | |
656 | * @param mtd MTD device structure | |
657 | * @param new_state the state which is requested | |
658 | * | |
659 | * Get the device and lock it for exclusive access | |
660 | */ | |
661 | static int onenand_get_device(struct mtd_info *mtd, int new_state) | |
662 | { | |
663 | struct onenand_chip *this = mtd->priv; | |
664 | DECLARE_WAITQUEUE(wait, current); | |
665 | ||
666 | /* | |
667 | * Grab the lock and see if the device is available | |
668 | */ | |
669 | while (1) { | |
670 | spin_lock(&this->chip_lock); | |
671 | if (this->state == FL_READY) { | |
672 | this->state = new_state; | |
673 | spin_unlock(&this->chip_lock); | |
674 | break; | |
675 | } | |
676 | if (new_state == FL_PM_SUSPENDED) { | |
677 | spin_unlock(&this->chip_lock); | |
678 | return (this->state == FL_PM_SUSPENDED) ? 0 : -EAGAIN; | |
679 | } | |
680 | set_current_state(TASK_UNINTERRUPTIBLE); | |
681 | add_wait_queue(&this->wq, &wait); | |
682 | spin_unlock(&this->chip_lock); | |
683 | schedule(); | |
684 | remove_wait_queue(&this->wq, &wait); | |
685 | } | |
686 | ||
687 | return 0; | |
688 | } | |
689 | ||
690 | /** | |
691 | * onenand_release_device - [GENERIC] release chip | |
692 | * @param mtd MTD device structure | |
693 | * | |
694 | * Deselect, release chip lock and wake up anyone waiting on the device | |
695 | */ | |
696 | static void onenand_release_device(struct mtd_info *mtd) | |
697 | { | |
698 | struct onenand_chip *this = mtd->priv; | |
699 | ||
700 | /* Release the chip */ | |
701 | spin_lock(&this->chip_lock); | |
702 | this->state = FL_READY; | |
703 | wake_up(&this->wq); | |
704 | spin_unlock(&this->chip_lock); | |
705 | } | |
706 | ||
707 | /** | |
708 | * onenand_read - [MTD Interface] Read data from flash | |
709 | * @param mtd MTD device structure | |
710 | * @param from offset to read from | |
711 | * @param len number of bytes to read | |
712 | * @param retlen pointer to variable to store the number of read bytes | |
713 | * @param buf the databuffer to put data | |
714 | * | |
715 | * Read with ecc | |
716 | */ | |
717 | static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len, | |
718 | size_t *retlen, u_char *buf) | |
719 | { | |
720 | struct onenand_chip *this = mtd->priv; | |
721 | struct mtd_ecc_stats stats; | |
722 | int read = 0, column; | |
723 | int thislen; | |
724 | int ret = 0; | |
725 | ||
726 | DEBUG(MTD_DEBUG_LEVEL3, "onenand_read: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len); | |
727 | ||
728 | /* Do not allow reads past end of device */ | |
729 | if ((from + len) > mtd->size) { | |
730 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_read: Attempt read beyond end of device\n"); | |
731 | *retlen = 0; | |
732 | return -EINVAL; | |
733 | } | |
734 | ||
735 | /* Grab the lock and see if the device is available */ | |
736 | onenand_get_device(mtd, FL_READING); | |
737 | ||
738 | /* TODO handling oob */ | |
739 | ||
740 | stats = mtd->ecc_stats; | |
741 | while (read < len) { | |
742 | thislen = min_t(int, mtd->writesize, len - read); | |
743 | ||
744 | column = from & (mtd->writesize - 1); | |
745 | if (column + thislen > mtd->writesize) | |
746 | thislen = mtd->writesize - column; | |
747 | ||
748 | if (!onenand_check_bufferram(mtd, from)) { | |
749 | this->command(mtd, ONENAND_CMD_READ, from, mtd->writesize); | |
750 | ||
751 | ret = this->wait(mtd, FL_READING); | |
752 | /* First copy data and check return value for ECC handling */ | |
753 | onenand_update_bufferram(mtd, from, 1); | |
754 | } | |
755 | ||
756 | this->read_bufferram(mtd, ONENAND_DATARAM, buf, column, thislen); | |
757 | ||
758 | read += thislen; | |
759 | ||
760 | if (read == len) | |
761 | break; | |
762 | ||
763 | if (ret) { | |
764 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_read: read failed = %d\n", ret); | |
765 | goto out; | |
766 | } | |
767 | ||
768 | from += thislen; | |
769 | buf += thislen; | |
770 | } | |
771 | ||
772 | out: | |
773 | /* Deselect and wake up anyone waiting on the device */ | |
774 | onenand_release_device(mtd); | |
775 | ||
776 | /* | |
777 | * Return success, if no ECC failures, else -EBADMSG | |
778 | * fs driver will take care of that, because | |
779 | * retlen == desired len and result == -EBADMSG | |
780 | */ | |
781 | *retlen = read; | |
782 | ||
783 | if (mtd->ecc_stats.failed - stats.failed) | |
784 | return -EBADMSG; | |
785 | ||
786 | return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0; | |
787 | } | |
788 | ||
789 | /** | |
790 | * onenand_do_read_oob - [MTD Interface] OneNAND read out-of-band | |
791 | * @param mtd MTD device structure | |
792 | * @param from offset to read from | |
793 | * @param len number of bytes to read | |
794 | * @param retlen pointer to variable to store the number of read bytes | |
795 | * @param buf the databuffer to put data | |
796 | * | |
797 | * OneNAND read out-of-band data from the spare area | |
798 | */ | |
799 | int onenand_do_read_oob(struct mtd_info *mtd, loff_t from, size_t len, | |
800 | size_t *retlen, u_char *buf) | |
801 | { | |
802 | struct onenand_chip *this = mtd->priv; | |
803 | int read = 0, thislen, column; | |
804 | int ret = 0; | |
805 | ||
806 | DEBUG(MTD_DEBUG_LEVEL3, "onenand_read_oob: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len); | |
807 | ||
808 | /* Initialize return length value */ | |
809 | *retlen = 0; | |
810 | ||
811 | /* Do not allow reads past end of device */ | |
812 | if (unlikely((from + len) > mtd->size)) { | |
813 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_read_oob: Attempt read beyond end of device\n"); | |
814 | return -EINVAL; | |
815 | } | |
816 | ||
817 | /* Grab the lock and see if the device is available */ | |
818 | onenand_get_device(mtd, FL_READING); | |
819 | ||
820 | column = from & (mtd->oobsize - 1); | |
821 | ||
822 | while (read < len) { | |
823 | thislen = mtd->oobsize - column; | |
824 | thislen = min_t(int, thislen, len); | |
825 | ||
826 | this->command(mtd, ONENAND_CMD_READOOB, from, mtd->oobsize); | |
827 | ||
828 | onenand_update_bufferram(mtd, from, 0); | |
829 | ||
830 | ret = this->wait(mtd, FL_READING); | |
831 | /* First copy data and check return value for ECC handling */ | |
832 | ||
833 | this->read_bufferram(mtd, ONENAND_SPARERAM, buf, column, thislen); | |
834 | ||
835 | read += thislen; | |
836 | ||
837 | if (read == len) | |
838 | break; | |
839 | ||
840 | if (ret) { | |
841 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_read_oob: read failed = %d\n", ret); | |
842 | goto out; | |
843 | } | |
844 | ||
845 | buf += thislen; | |
846 | ||
847 | /* Read more? */ | |
848 | if (read < len) { | |
849 | /* Page size */ | |
850 | from += mtd->writesize; | |
851 | column = 0; | |
852 | } | |
853 | } | |
854 | ||
855 | out: | |
856 | /* Deselect and wake up anyone waiting on the device */ | |
857 | onenand_release_device(mtd); | |
858 | ||
859 | *retlen = read; | |
860 | return ret; | |
861 | } | |
862 | ||
863 | /** | |
864 | * onenand_read_oob - [MTD Interface] NAND write data and/or out-of-band | |
865 | * @mtd: MTD device structure | |
866 | * @from: offset to read from | |
867 | * @ops: oob operation description structure | |
868 | */ | |
869 | static int onenand_read_oob(struct mtd_info *mtd, loff_t from, | |
870 | struct mtd_oob_ops *ops) | |
871 | { | |
872 | BUG_ON(ops->mode != MTD_OOB_PLACE); | |
873 | ||
874 | return onenand_do_read_oob(mtd, from + ops->ooboffs, ops->len, | |
875 | &ops->retlen, ops->oobbuf); | |
876 | } | |
877 | ||
878 | #ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE | |
879 | /** | |
880 | * onenand_verify_oob - [GENERIC] verify the oob contents after a write | |
881 | * @param mtd MTD device structure | |
882 | * @param buf the databuffer to verify | |
883 | * @param to offset to read from | |
884 | * @param len number of bytes to read and compare | |
885 | * | |
886 | */ | |
887 | static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to, int len) | |
888 | { | |
889 | struct onenand_chip *this = mtd->priv; | |
890 | char *readp = this->page_buf; | |
891 | int column = to & (mtd->oobsize - 1); | |
892 | int status, i; | |
893 | ||
894 | this->command(mtd, ONENAND_CMD_READOOB, to, mtd->oobsize); | |
895 | onenand_update_bufferram(mtd, to, 0); | |
896 | status = this->wait(mtd, FL_READING); | |
897 | if (status) | |
898 | return status; | |
899 | ||
900 | this->read_bufferram(mtd, ONENAND_SPARERAM, readp, column, len); | |
901 | ||
902 | for(i = 0; i < len; i++) | |
903 | if (buf[i] != 0xFF && buf[i] != readp[i]) | |
904 | return -EBADMSG; | |
905 | ||
906 | return 0; | |
907 | } | |
908 | ||
909 | /** | |
910 | * onenand_verify_page - [GENERIC] verify the chip contents after a write | |
911 | * @param mtd MTD device structure | |
912 | * @param buf the databuffer to verify | |
913 | * | |
914 | * Check DataRAM area directly | |
915 | */ | |
916 | static int onenand_verify_page(struct mtd_info *mtd, u_char *buf, loff_t addr) | |
917 | { | |
918 | struct onenand_chip *this = mtd->priv; | |
919 | void __iomem *dataram0, *dataram1; | |
920 | int ret = 0; | |
921 | ||
922 | this->command(mtd, ONENAND_CMD_READ, addr, mtd->writesize); | |
923 | ||
924 | ret = this->wait(mtd, FL_READING); | |
925 | if (ret) | |
926 | return ret; | |
927 | ||
928 | onenand_update_bufferram(mtd, addr, 1); | |
929 | ||
930 | /* Check, if the two dataram areas are same */ | |
931 | dataram0 = this->base + ONENAND_DATARAM; | |
932 | dataram1 = dataram0 + mtd->writesize; | |
933 | ||
934 | if (memcmp(dataram0, dataram1, mtd->writesize)) | |
935 | return -EBADMSG; | |
936 | ||
937 | return 0; | |
938 | } | |
939 | #else | |
940 | #define onenand_verify_page(...) (0) | |
941 | #define onenand_verify_oob(...) (0) | |
942 | #endif | |
943 | ||
944 | #define NOTALIGNED(x) ((x & (mtd->writesize - 1)) != 0) | |
945 | ||
946 | /** | |
947 | * onenand_write - [MTD Interface] write buffer to FLASH | |
948 | * @param mtd MTD device structure | |
949 | * @param to offset to write to | |
950 | * @param len number of bytes to write | |
951 | * @param retlen pointer to variable to store the number of written bytes | |
952 | * @param buf the data to write | |
953 | * | |
954 | * Write with ECC | |
955 | */ | |
956 | static int onenand_write(struct mtd_info *mtd, loff_t to, size_t len, | |
957 | size_t *retlen, const u_char *buf) | |
958 | { | |
959 | struct onenand_chip *this = mtd->priv; | |
960 | int written = 0; | |
961 | int ret = 0; | |
962 | ||
963 | DEBUG(MTD_DEBUG_LEVEL3, "onenand_write: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len); | |
964 | ||
965 | /* Initialize retlen, in case of early exit */ | |
966 | *retlen = 0; | |
967 | ||
968 | /* Do not allow writes past end of device */ | |
969 | if (unlikely((to + len) > mtd->size)) { | |
970 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_write: Attempt write to past end of device\n"); | |
971 | return -EINVAL; | |
972 | } | |
973 | ||
974 | /* Reject writes, which are not page aligned */ | |
975 | if (unlikely(NOTALIGNED(to)) || unlikely(NOTALIGNED(len))) { | |
976 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_write: Attempt to write not page aligned data\n"); | |
977 | return -EINVAL; | |
978 | } | |
979 | ||
980 | /* Grab the lock and see if the device is available */ | |
981 | onenand_get_device(mtd, FL_WRITING); | |
982 | ||
983 | /* Loop until all data write */ | |
984 | while (written < len) { | |
985 | int thislen = min_t(int, mtd->writesize, len - written); | |
986 | ||
987 | this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->writesize); | |
988 | ||
989 | this->write_bufferram(mtd, ONENAND_DATARAM, buf, 0, thislen); | |
990 | this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 0, mtd->oobsize); | |
991 | ||
992 | this->command(mtd, ONENAND_CMD_PROG, to, mtd->writesize); | |
993 | ||
994 | onenand_update_bufferram(mtd, to, 1); | |
995 | ||
996 | ret = this->wait(mtd, FL_WRITING); | |
997 | if (ret) { | |
998 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_write: write filaed %d\n", ret); | |
999 | goto out; | |
1000 | } | |
1001 | ||
1002 | written += thislen; | |
1003 | ||
1004 | /* Only check verify write turn on */ | |
1005 | ret = onenand_verify_page(mtd, (u_char *) buf, to); | |
1006 | if (ret) { | |
1007 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_write: verify failed %d\n", ret); | |
1008 | goto out; | |
1009 | } | |
1010 | ||
1011 | if (written == len) | |
1012 | break; | |
1013 | ||
1014 | to += thislen; | |
1015 | buf += thislen; | |
1016 | } | |
1017 | ||
1018 | out: | |
1019 | /* Deselect and wake up anyone waiting on the device */ | |
1020 | onenand_release_device(mtd); | |
1021 | ||
1022 | *retlen = written; | |
1023 | ||
1024 | return ret; | |
1025 | } | |
1026 | ||
1027 | /** | |
1028 | * onenand_do_write_oob - [Internal] OneNAND write out-of-band | |
1029 | * @param mtd MTD device structure | |
1030 | * @param to offset to write to | |
1031 | * @param len number of bytes to write | |
1032 | * @param retlen pointer to variable to store the number of written bytes | |
1033 | * @param buf the data to write | |
1034 | * | |
1035 | * OneNAND write out-of-band | |
1036 | */ | |
1037 | static int onenand_do_write_oob(struct mtd_info *mtd, loff_t to, size_t len, | |
1038 | size_t *retlen, const u_char *buf) | |
1039 | { | |
1040 | struct onenand_chip *this = mtd->priv; | |
1041 | int column, ret = 0; | |
1042 | int written = 0; | |
1043 | ||
1044 | DEBUG(MTD_DEBUG_LEVEL3, "onenand_write_oob: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len); | |
1045 | ||
1046 | /* Initialize retlen, in case of early exit */ | |
1047 | *retlen = 0; | |
1048 | ||
1049 | /* Do not allow writes past end of device */ | |
1050 | if (unlikely((to + len) > mtd->size)) { | |
1051 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: Attempt write to past end of device\n"); | |
1052 | return -EINVAL; | |
1053 | } | |
1054 | ||
1055 | /* Grab the lock and see if the device is available */ | |
1056 | onenand_get_device(mtd, FL_WRITING); | |
1057 | ||
1058 | /* Loop until all data write */ | |
1059 | while (written < len) { | |
1060 | int thislen = min_t(int, mtd->oobsize, len - written); | |
1061 | ||
1062 | column = to & (mtd->oobsize - 1); | |
1063 | ||
1064 | this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->oobsize); | |
1065 | ||
1066 | /* We send data to spare ram with oobsize | |
1067 | * to prevent byte access */ | |
1068 | memset(this->page_buf, 0xff, mtd->oobsize); | |
1069 | memcpy(this->page_buf + column, buf, thislen); | |
1070 | this->write_bufferram(mtd, ONENAND_SPARERAM, this->page_buf, 0, mtd->oobsize); | |
1071 | ||
1072 | this->command(mtd, ONENAND_CMD_PROGOOB, to, mtd->oobsize); | |
1073 | ||
1074 | onenand_update_bufferram(mtd, to, 0); | |
1075 | ||
1076 | ret = this->wait(mtd, FL_WRITING); | |
1077 | if (ret) { | |
1078 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: write filaed %d\n", ret); | |
1079 | goto out; | |
1080 | } | |
1081 | ||
1082 | ret = onenand_verify_oob(mtd, buf, to, thislen); | |
1083 | if (ret) { | |
1084 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: verify failed %d\n", ret); | |
1085 | goto out; | |
1086 | } | |
1087 | ||
1088 | written += thislen; | |
1089 | ||
1090 | if (written == len) | |
1091 | break; | |
1092 | ||
1093 | to += thislen; | |
1094 | buf += thislen; | |
1095 | } | |
1096 | ||
1097 | out: | |
1098 | /* Deselect and wake up anyone waiting on the device */ | |
1099 | onenand_release_device(mtd); | |
1100 | ||
1101 | *retlen = written; | |
1102 | ||
1103 | return ret; | |
1104 | } | |
1105 | ||
1106 | /** | |
1107 | * onenand_write_oob - [MTD Interface] NAND write data and/or out-of-band | |
1108 | * @mtd: MTD device structure | |
1109 | * @from: offset to read from | |
1110 | * @ops: oob operation description structure | |
1111 | */ | |
1112 | static int onenand_write_oob(struct mtd_info *mtd, loff_t to, | |
1113 | struct mtd_oob_ops *ops) | |
1114 | { | |
1115 | BUG_ON(ops->mode != MTD_OOB_PLACE); | |
1116 | ||
1117 | return onenand_do_write_oob(mtd, to + ops->ooboffs, ops->len, | |
1118 | &ops->retlen, ops->oobbuf); | |
1119 | } | |
1120 | ||
1121 | /** | |
1122 | * onenand_block_checkbad - [GENERIC] Check if a block is marked bad | |
1123 | * @param mtd MTD device structure | |
1124 | * @param ofs offset from device start | |
1125 | * @param getchip 0, if the chip is already selected | |
1126 | * @param allowbbt 1, if its allowed to access the bbt area | |
1127 | * | |
1128 | * Check, if the block is bad. Either by reading the bad block table or | |
1129 | * calling of the scan function. | |
1130 | */ | |
1131 | static int onenand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, int allowbbt) | |
1132 | { | |
1133 | struct onenand_chip *this = mtd->priv; | |
1134 | struct bbm_info *bbm = this->bbm; | |
1135 | ||
1136 | /* Return info from the table */ | |
1137 | return bbm->isbad_bbt(mtd, ofs, allowbbt); | |
1138 | } | |
1139 | ||
1140 | /** | |
1141 | * onenand_erase - [MTD Interface] erase block(s) | |
1142 | * @param mtd MTD device structure | |
1143 | * @param instr erase instruction | |
1144 | * | |
1145 | * Erase one ore more blocks | |
1146 | */ | |
1147 | static int onenand_erase(struct mtd_info *mtd, struct erase_info *instr) | |
1148 | { | |
1149 | struct onenand_chip *this = mtd->priv; | |
1150 | unsigned int block_size; | |
1151 | loff_t addr; | |
1152 | int len; | |
1153 | int ret = 0; | |
1154 | ||
1155 | DEBUG(MTD_DEBUG_LEVEL3, "onenand_erase: start = 0x%08x, len = %i\n", (unsigned int) instr->addr, (unsigned int) instr->len); | |
1156 | ||
1157 | block_size = (1 << this->erase_shift); | |
1158 | ||
1159 | /* Start address must align on block boundary */ | |
1160 | if (unlikely(instr->addr & (block_size - 1))) { | |
1161 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Unaligned address\n"); | |
1162 | return -EINVAL; | |
1163 | } | |
1164 | ||
1165 | /* Length must align on block boundary */ | |
1166 | if (unlikely(instr->len & (block_size - 1))) { | |
1167 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Length not block aligned\n"); | |
1168 | return -EINVAL; | |
1169 | } | |
1170 | ||
1171 | /* Do not allow erase past end of device */ | |
1172 | if (unlikely((instr->len + instr->addr) > mtd->size)) { | |
1173 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Erase past end of device\n"); | |
1174 | return -EINVAL; | |
1175 | } | |
1176 | ||
1177 | instr->fail_addr = 0xffffffff; | |
1178 | ||
1179 | /* Grab the lock and see if the device is available */ | |
1180 | onenand_get_device(mtd, FL_ERASING); | |
1181 | ||
1182 | /* Loop throught the pages */ | |
1183 | len = instr->len; | |
1184 | addr = instr->addr; | |
1185 | ||
1186 | instr->state = MTD_ERASING; | |
1187 | ||
1188 | while (len) { | |
1189 | ||
1190 | /* Check if we have a bad block, we do not erase bad blocks */ | |
1191 | if (onenand_block_checkbad(mtd, addr, 0, 0)) { | |
1192 | printk (KERN_WARNING "onenand_erase: attempt to erase a bad block at addr 0x%08x\n", (unsigned int) addr); | |
1193 | instr->state = MTD_ERASE_FAILED; | |
1194 | goto erase_exit; | |
1195 | } | |
1196 | ||
1197 | this->command(mtd, ONENAND_CMD_ERASE, addr, block_size); | |
1198 | ||
1199 | ret = this->wait(mtd, FL_ERASING); | |
1200 | /* Check, if it is write protected */ | |
1201 | if (ret) { | |
1202 | if (ret == -EPERM) | |
1203 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Device is write protected!!!\n"); | |
1204 | else | |
1205 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Failed erase, block %d\n", (unsigned) (addr >> this->erase_shift)); | |
1206 | instr->state = MTD_ERASE_FAILED; | |
1207 | instr->fail_addr = addr; | |
1208 | goto erase_exit; | |
1209 | } | |
1210 | ||
1211 | len -= block_size; | |
1212 | addr += block_size; | |
1213 | } | |
1214 | ||
1215 | instr->state = MTD_ERASE_DONE; | |
1216 | ||
1217 | erase_exit: | |
1218 | ||
1219 | ret = instr->state == MTD_ERASE_DONE ? 0 : -EIO; | |
1220 | /* Do call back function */ | |
1221 | if (!ret) | |
1222 | mtd_erase_callback(instr); | |
1223 | ||
1224 | /* Deselect and wake up anyone waiting on the device */ | |
1225 | onenand_release_device(mtd); | |
1226 | ||
1227 | return ret; | |
1228 | } | |
1229 | ||
1230 | /** | |
1231 | * onenand_sync - [MTD Interface] sync | |
1232 | * @param mtd MTD device structure | |
1233 | * | |
1234 | * Sync is actually a wait for chip ready function | |
1235 | */ | |
1236 | static void onenand_sync(struct mtd_info *mtd) | |
1237 | { | |
1238 | DEBUG(MTD_DEBUG_LEVEL3, "onenand_sync: called\n"); | |
1239 | ||
1240 | /* Grab the lock and see if the device is available */ | |
1241 | onenand_get_device(mtd, FL_SYNCING); | |
1242 | ||
1243 | /* Release it and go back */ | |
1244 | onenand_release_device(mtd); | |
1245 | } | |
1246 | ||
1247 | /** | |
1248 | * onenand_block_isbad - [MTD Interface] Check whether the block at the given offset is bad | |
1249 | * @param mtd MTD device structure | |
1250 | * @param ofs offset relative to mtd start | |
1251 | * | |
1252 | * Check whether the block is bad | |
1253 | */ | |
1254 | static int onenand_block_isbad(struct mtd_info *mtd, loff_t ofs) | |
1255 | { | |
1256 | /* Check for invalid offset */ | |
1257 | if (ofs > mtd->size) | |
1258 | return -EINVAL; | |
1259 | ||
1260 | return onenand_block_checkbad(mtd, ofs, 1, 0); | |
1261 | } | |
1262 | ||
1263 | /** | |
1264 | * onenand_default_block_markbad - [DEFAULT] mark a block bad | |
1265 | * @param mtd MTD device structure | |
1266 | * @param ofs offset from device start | |
1267 | * | |
1268 | * This is the default implementation, which can be overridden by | |
1269 | * a hardware specific driver. | |
1270 | */ | |
1271 | static int onenand_default_block_markbad(struct mtd_info *mtd, loff_t ofs) | |
1272 | { | |
1273 | struct onenand_chip *this = mtd->priv; | |
1274 | struct bbm_info *bbm = this->bbm; | |
1275 | u_char buf[2] = {0, 0}; | |
1276 | size_t retlen; | |
1277 | int block; | |
1278 | ||
1279 | /* Get block number */ | |
1280 | block = ((int) ofs) >> bbm->bbt_erase_shift; | |
1281 | if (bbm->bbt) | |
1282 | bbm->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1); | |
1283 | ||
1284 | /* We write two bytes, so we dont have to mess with 16 bit access */ | |
1285 | ofs += mtd->oobsize + (bbm->badblockpos & ~0x01); | |
1286 | return onenand_do_write_oob(mtd, ofs , 2, &retlen, buf); | |
1287 | } | |
1288 | ||
1289 | /** | |
1290 | * onenand_block_markbad - [MTD Interface] Mark the block at the given offset as bad | |
1291 | * @param mtd MTD device structure | |
1292 | * @param ofs offset relative to mtd start | |
1293 | * | |
1294 | * Mark the block as bad | |
1295 | */ | |
1296 | static int onenand_block_markbad(struct mtd_info *mtd, loff_t ofs) | |
1297 | { | |
1298 | struct onenand_chip *this = mtd->priv; | |
1299 | int ret; | |
1300 | ||
1301 | ret = onenand_block_isbad(mtd, ofs); | |
1302 | if (ret) { | |
1303 | /* If it was bad already, return success and do nothing */ | |
1304 | if (ret > 0) | |
1305 | return 0; | |
1306 | return ret; | |
1307 | } | |
1308 | ||
1309 | return this->block_markbad(mtd, ofs); | |
1310 | } | |
1311 | ||
1312 | /** | |
1313 | * onenand_do_lock_cmd - [OneNAND Interface] Lock or unlock block(s) | |
1314 | * @param mtd MTD device structure | |
1315 | * @param ofs offset relative to mtd start | |
1316 | * @param len number of bytes to lock or unlock | |
1317 | * | |
1318 | * Lock or unlock one or more blocks | |
1319 | */ | |
1320 | static int onenand_do_lock_cmd(struct mtd_info *mtd, loff_t ofs, size_t len, int cmd) | |
1321 | { | |
1322 | struct onenand_chip *this = mtd->priv; | |
1323 | int start, end, block, value, status; | |
1324 | int wp_status_mask; | |
1325 | ||
1326 | start = ofs >> this->erase_shift; | |
1327 | end = len >> this->erase_shift; | |
1328 | ||
1329 | if (cmd == ONENAND_CMD_LOCK) | |
1330 | wp_status_mask = ONENAND_WP_LS; | |
1331 | else | |
1332 | wp_status_mask = ONENAND_WP_US; | |
1333 | ||
1334 | /* Continuous lock scheme */ | |
1335 | if (this->options & ONENAND_HAS_CONT_LOCK) { | |
1336 | /* Set start block address */ | |
1337 | this->write_word(start, this->base + ONENAND_REG_START_BLOCK_ADDRESS); | |
1338 | /* Set end block address */ | |
1339 | this->write_word(start + end - 1, this->base + ONENAND_REG_END_BLOCK_ADDRESS); | |
1340 | /* Write lock command */ | |
1341 | this->command(mtd, cmd, 0, 0); | |
1342 | ||
1343 | /* There's no return value */ | |
1344 | this->wait(mtd, FL_LOCKING); | |
1345 | ||
1346 | /* Sanity check */ | |
1347 | while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS) | |
1348 | & ONENAND_CTRL_ONGO) | |
1349 | continue; | |
1350 | ||
1351 | /* Check lock status */ | |
1352 | status = this->read_word(this->base + ONENAND_REG_WP_STATUS); | |
1353 | if (!(status & wp_status_mask)) | |
1354 | printk(KERN_ERR "wp status = 0x%x\n", status); | |
1355 | ||
1356 | return 0; | |
1357 | } | |
1358 | ||
1359 | /* Block lock scheme */ | |
1360 | for (block = start; block < start + end; block++) { | |
1361 | /* Set block address */ | |
1362 | value = onenand_block_address(this, block); | |
1363 | this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1); | |
1364 | /* Select DataRAM for DDP */ | |
1365 | value = onenand_bufferram_address(this, block); | |
1366 | this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2); | |
1367 | /* Set start block address */ | |
1368 | this->write_word(block, this->base + ONENAND_REG_START_BLOCK_ADDRESS); | |
1369 | /* Write lock command */ | |
1370 | this->command(mtd, cmd, 0, 0); | |
1371 | ||
1372 | /* There's no return value */ | |
1373 | this->wait(mtd, FL_LOCKING); | |
1374 | ||
1375 | /* Sanity check */ | |
1376 | while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS) | |
1377 | & ONENAND_CTRL_ONGO) | |
1378 | continue; | |
1379 | ||
1380 | /* Check lock status */ | |
1381 | status = this->read_word(this->base + ONENAND_REG_WP_STATUS); | |
1382 | if (!(status & wp_status_mask)) | |
1383 | printk(KERN_ERR "block = %d, wp status = 0x%x\n", block, status); | |
1384 | } | |
1385 | ||
1386 | return 0; | |
1387 | } | |
1388 | ||
1389 | /** | |
1390 | * onenand_lock - [MTD Interface] Lock block(s) | |
1391 | * @param mtd MTD device structure | |
1392 | * @param ofs offset relative to mtd start | |
1393 | * @param len number of bytes to unlock | |
1394 | * | |
1395 | * Lock one or more blocks | |
1396 | */ | |
1397 | static int onenand_lock(struct mtd_info *mtd, loff_t ofs, size_t len) | |
1398 | { | |
1399 | return onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_LOCK); | |
1400 | } | |
1401 | ||
1402 | /** | |
1403 | * onenand_unlock - [MTD Interface] Unlock block(s) | |
1404 | * @param mtd MTD device structure | |
1405 | * @param ofs offset relative to mtd start | |
1406 | * @param len number of bytes to unlock | |
1407 | * | |
1408 | * Unlock one or more blocks | |
1409 | */ | |
1410 | static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len) | |
1411 | { | |
1412 | return onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK); | |
1413 | } | |
1414 | ||
1415 | /** | |
1416 | * onenand_check_lock_status - [OneNAND Interface] Check lock status | |
1417 | * @param this onenand chip data structure | |
1418 | * | |
1419 | * Check lock status | |
1420 | */ | |
1421 | static void onenand_check_lock_status(struct onenand_chip *this) | |
1422 | { | |
1423 | unsigned int value, block, status; | |
1424 | unsigned int end; | |
1425 | ||
1426 | end = this->chipsize >> this->erase_shift; | |
1427 | for (block = 0; block < end; block++) { | |
1428 | /* Set block address */ | |
1429 | value = onenand_block_address(this, block); | |
1430 | this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1); | |
1431 | /* Select DataRAM for DDP */ | |
1432 | value = onenand_bufferram_address(this, block); | |
1433 | this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2); | |
1434 | /* Set start block address */ | |
1435 | this->write_word(block, this->base + ONENAND_REG_START_BLOCK_ADDRESS); | |
1436 | ||
1437 | /* Check lock status */ | |
1438 | status = this->read_word(this->base + ONENAND_REG_WP_STATUS); | |
1439 | if (!(status & ONENAND_WP_US)) | |
1440 | printk(KERN_ERR "block = %d, wp status = 0x%x\n", block, status); | |
1441 | } | |
1442 | } | |
1443 | ||
1444 | /** | |
1445 | * onenand_unlock_all - [OneNAND Interface] unlock all blocks | |
1446 | * @param mtd MTD device structure | |
1447 | * | |
1448 | * Unlock all blocks | |
1449 | */ | |
1450 | static int onenand_unlock_all(struct mtd_info *mtd) | |
1451 | { | |
1452 | struct onenand_chip *this = mtd->priv; | |
1453 | ||
1454 | if (this->options & ONENAND_HAS_UNLOCK_ALL) { | |
1455 | /* Write unlock command */ | |
1456 | this->command(mtd, ONENAND_CMD_UNLOCK_ALL, 0, 0); | |
1457 | ||
1458 | /* There's no return value */ | |
1459 | this->wait(mtd, FL_LOCKING); | |
1460 | ||
1461 | /* Sanity check */ | |
1462 | while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS) | |
1463 | & ONENAND_CTRL_ONGO) | |
1464 | continue; | |
1465 | ||
1466 | /* Workaround for all block unlock in DDP */ | |
1467 | if (this->device_id & ONENAND_DEVICE_IS_DDP) { | |
1468 | loff_t ofs; | |
1469 | size_t len; | |
1470 | ||
1471 | /* 1st block on another chip */ | |
1472 | ofs = this->chipsize >> 1; | |
1473 | len = 1 << this->erase_shift; | |
1474 | ||
1475 | onenand_unlock(mtd, ofs, len); | |
1476 | } | |
1477 | ||
1478 | onenand_check_lock_status(this); | |
1479 | ||
1480 | return 0; | |
1481 | } | |
1482 | ||
1483 | onenand_unlock(mtd, 0x0, this->chipsize); | |
1484 | ||
1485 | return 0; | |
1486 | } | |
1487 | ||
1488 | #ifdef CONFIG_MTD_ONENAND_OTP | |
1489 | ||
1490 | /* Interal OTP operation */ | |
1491 | typedef int (*otp_op_t)(struct mtd_info *mtd, loff_t form, size_t len, | |
1492 | size_t *retlen, u_char *buf); | |
1493 | ||
1494 | /** | |
1495 | * do_otp_read - [DEFAULT] Read OTP block area | |
1496 | * @param mtd MTD device structure | |
1497 | * @param from The offset to read | |
1498 | * @param len number of bytes to read | |
1499 | * @param retlen pointer to variable to store the number of readbytes | |
1500 | * @param buf the databuffer to put/get data | |
1501 | * | |
1502 | * Read OTP block area. | |
1503 | */ | |
1504 | static int do_otp_read(struct mtd_info *mtd, loff_t from, size_t len, | |
1505 | size_t *retlen, u_char *buf) | |
1506 | { | |
1507 | struct onenand_chip *this = mtd->priv; | |
1508 | int ret; | |
1509 | ||
1510 | /* Enter OTP access mode */ | |
1511 | this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0); | |
1512 | this->wait(mtd, FL_OTPING); | |
1513 | ||
1514 | ret = mtd->read(mtd, from, len, retlen, buf); | |
1515 | ||
1516 | /* Exit OTP access mode */ | |
1517 | this->command(mtd, ONENAND_CMD_RESET, 0, 0); | |
1518 | this->wait(mtd, FL_RESETING); | |
1519 | ||
1520 | return ret; | |
1521 | } | |
1522 | ||
1523 | /** | |
1524 | * do_otp_write - [DEFAULT] Write OTP block area | |
1525 | * @param mtd MTD device structure | |
1526 | * @param from The offset to write | |
1527 | * @param len number of bytes to write | |
1528 | * @param retlen pointer to variable to store the number of write bytes | |
1529 | * @param buf the databuffer to put/get data | |
1530 | * | |
1531 | * Write OTP block area. | |
1532 | */ | |
1533 | static int do_otp_write(struct mtd_info *mtd, loff_t from, size_t len, | |
1534 | size_t *retlen, u_char *buf) | |
1535 | { | |
1536 | struct onenand_chip *this = mtd->priv; | |
1537 | unsigned char *pbuf = buf; | |
1538 | int ret; | |
1539 | ||
1540 | /* Force buffer page aligned */ | |
1541 | if (len < mtd->writesize) { | |
1542 | memcpy(this->page_buf, buf, len); | |
1543 | memset(this->page_buf + len, 0xff, mtd->writesize - len); | |
1544 | pbuf = this->page_buf; | |
1545 | len = mtd->writesize; | |
1546 | } | |
1547 | ||
1548 | /* Enter OTP access mode */ | |
1549 | this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0); | |
1550 | this->wait(mtd, FL_OTPING); | |
1551 | ||
1552 | ret = mtd->write(mtd, from, len, retlen, pbuf); | |
1553 | ||
1554 | /* Exit OTP access mode */ | |
1555 | this->command(mtd, ONENAND_CMD_RESET, 0, 0); | |
1556 | this->wait(mtd, FL_RESETING); | |
1557 | ||
1558 | return ret; | |
1559 | } | |
1560 | ||
1561 | /** | |
1562 | * do_otp_lock - [DEFAULT] Lock OTP block area | |
1563 | * @param mtd MTD device structure | |
1564 | * @param from The offset to lock | |
1565 | * @param len number of bytes to lock | |
1566 | * @param retlen pointer to variable to store the number of lock bytes | |
1567 | * @param buf the databuffer to put/get data | |
1568 | * | |
1569 | * Lock OTP block area. | |
1570 | */ | |
1571 | static int do_otp_lock(struct mtd_info *mtd, loff_t from, size_t len, | |
1572 | size_t *retlen, u_char *buf) | |
1573 | { | |
1574 | struct onenand_chip *this = mtd->priv; | |
1575 | int ret; | |
1576 | ||
1577 | /* Enter OTP access mode */ | |
1578 | this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0); | |
1579 | this->wait(mtd, FL_OTPING); | |
1580 | ||
1581 | ret = onenand_do_write_oob(mtd, from, len, retlen, buf); | |
1582 | ||
1583 | /* Exit OTP access mode */ | |
1584 | this->command(mtd, ONENAND_CMD_RESET, 0, 0); | |
1585 | this->wait(mtd, FL_RESETING); | |
1586 | ||
1587 | return ret; | |
1588 | } | |
1589 | ||
1590 | /** | |
1591 | * onenand_otp_walk - [DEFAULT] Handle OTP operation | |
1592 | * @param mtd MTD device structure | |
1593 | * @param from The offset to read/write | |
1594 | * @param len number of bytes to read/write | |
1595 | * @param retlen pointer to variable to store the number of read bytes | |
1596 | * @param buf the databuffer to put/get data | |
1597 | * @param action do given action | |
1598 | * @param mode specify user and factory | |
1599 | * | |
1600 | * Handle OTP operation. | |
1601 | */ | |
1602 | static int onenand_otp_walk(struct mtd_info *mtd, loff_t from, size_t len, | |
1603 | size_t *retlen, u_char *buf, | |
1604 | otp_op_t action, int mode) | |
1605 | { | |
1606 | struct onenand_chip *this = mtd->priv; | |
1607 | int otp_pages; | |
1608 | int density; | |
1609 | int ret = 0; | |
1610 | ||
1611 | *retlen = 0; | |
1612 | ||
1613 | density = this->device_id >> ONENAND_DEVICE_DENSITY_SHIFT; | |
1614 | if (density < ONENAND_DEVICE_DENSITY_512Mb) | |
1615 | otp_pages = 20; | |
1616 | else | |
1617 | otp_pages = 10; | |
1618 | ||
1619 | if (mode == MTD_OTP_FACTORY) { | |
1620 | from += mtd->writesize * otp_pages; | |
1621 | otp_pages = 64 - otp_pages; | |
1622 | } | |
1623 | ||
1624 | /* Check User/Factory boundary */ | |
1625 | if (((mtd->writesize * otp_pages) - (from + len)) < 0) | |
1626 | return 0; | |
1627 | ||
1628 | while (len > 0 && otp_pages > 0) { | |
1629 | if (!action) { /* OTP Info functions */ | |
1630 | struct otp_info *otpinfo; | |
1631 | ||
1632 | len -= sizeof(struct otp_info); | |
1633 | if (len <= 0) | |
1634 | return -ENOSPC; | |
1635 | ||
1636 | otpinfo = (struct otp_info *) buf; | |
1637 | otpinfo->start = from; | |
1638 | otpinfo->length = mtd->writesize; | |
1639 | otpinfo->locked = 0; | |
1640 | ||
1641 | from += mtd->writesize; | |
1642 | buf += sizeof(struct otp_info); | |
1643 | *retlen += sizeof(struct otp_info); | |
1644 | } else { | |
1645 | size_t tmp_retlen; | |
1646 | int size = len; | |
1647 | ||
1648 | ret = action(mtd, from, len, &tmp_retlen, buf); | |
1649 | ||
1650 | buf += size; | |
1651 | len -= size; | |
1652 | *retlen += size; | |
1653 | ||
1654 | if (ret < 0) | |
1655 | return ret; | |
1656 | } | |
1657 | otp_pages--; | |
1658 | } | |
1659 | ||
1660 | return 0; | |
1661 | } | |
1662 | ||
1663 | /** | |
1664 | * onenand_get_fact_prot_info - [MTD Interface] Read factory OTP info | |
1665 | * @param mtd MTD device structure | |
1666 | * @param buf the databuffer to put/get data | |
1667 | * @param len number of bytes to read | |
1668 | * | |
1669 | * Read factory OTP info. | |
1670 | */ | |
1671 | static int onenand_get_fact_prot_info(struct mtd_info *mtd, | |
1672 | struct otp_info *buf, size_t len) | |
1673 | { | |
1674 | size_t retlen; | |
1675 | int ret; | |
1676 | ||
1677 | ret = onenand_otp_walk(mtd, 0, len, &retlen, (u_char *) buf, NULL, MTD_OTP_FACTORY); | |
1678 | ||
1679 | return ret ? : retlen; | |
1680 | } | |
1681 | ||
1682 | /** | |
1683 | * onenand_read_fact_prot_reg - [MTD Interface] Read factory OTP area | |
1684 | * @param mtd MTD device structure | |
1685 | * @param from The offset to read | |
1686 | * @param len number of bytes to read | |
1687 | * @param retlen pointer to variable to store the number of read bytes | |
1688 | * @param buf the databuffer to put/get data | |
1689 | * | |
1690 | * Read factory OTP area. | |
1691 | */ | |
1692 | static int onenand_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, | |
1693 | size_t len, size_t *retlen, u_char *buf) | |
1694 | { | |
1695 | return onenand_otp_walk(mtd, from, len, retlen, buf, do_otp_read, MTD_OTP_FACTORY); | |
1696 | } | |
1697 | ||
1698 | /** | |
1699 | * onenand_get_user_prot_info - [MTD Interface] Read user OTP info | |
1700 | * @param mtd MTD device structure | |
1701 | * @param buf the databuffer to put/get data | |
1702 | * @param len number of bytes to read | |
1703 | * | |
1704 | * Read user OTP info. | |
1705 | */ | |
1706 | static int onenand_get_user_prot_info(struct mtd_info *mtd, | |
1707 | struct otp_info *buf, size_t len) | |
1708 | { | |
1709 | size_t retlen; | |
1710 | int ret; | |
1711 | ||
1712 | ret = onenand_otp_walk(mtd, 0, len, &retlen, (u_char *) buf, NULL, MTD_OTP_USER); | |
1713 | ||
1714 | return ret ? : retlen; | |
1715 | } | |
1716 | ||
1717 | /** | |
1718 | * onenand_read_user_prot_reg - [MTD Interface] Read user OTP area | |
1719 | * @param mtd MTD device structure | |
1720 | * @param from The offset to read | |
1721 | * @param len number of bytes to read | |
1722 | * @param retlen pointer to variable to store the number of read bytes | |
1723 | * @param buf the databuffer to put/get data | |
1724 | * | |
1725 | * Read user OTP area. | |
1726 | */ | |
1727 | static int onenand_read_user_prot_reg(struct mtd_info *mtd, loff_t from, | |
1728 | size_t len, size_t *retlen, u_char *buf) | |
1729 | { | |
1730 | return onenand_otp_walk(mtd, from, len, retlen, buf, do_otp_read, MTD_OTP_USER); | |
1731 | } | |
1732 | ||
1733 | /** | |
1734 | * onenand_write_user_prot_reg - [MTD Interface] Write user OTP area | |
1735 | * @param mtd MTD device structure | |
1736 | * @param from The offset to write | |
1737 | * @param len number of bytes to write | |
1738 | * @param retlen pointer to variable to store the number of write bytes | |
1739 | * @param buf the databuffer to put/get data | |
1740 | * | |
1741 | * Write user OTP area. | |
1742 | */ | |
1743 | static int onenand_write_user_prot_reg(struct mtd_info *mtd, loff_t from, | |
1744 | size_t len, size_t *retlen, u_char *buf) | |
1745 | { | |
1746 | return onenand_otp_walk(mtd, from, len, retlen, buf, do_otp_write, MTD_OTP_USER); | |
1747 | } | |
1748 | ||
1749 | /** | |
1750 | * onenand_lock_user_prot_reg - [MTD Interface] Lock user OTP area | |
1751 | * @param mtd MTD device structure | |
1752 | * @param from The offset to lock | |
1753 | * @param len number of bytes to unlock | |
1754 | * | |
1755 | * Write lock mark on spare area in page 0 in OTP block | |
1756 | */ | |
1757 | static int onenand_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, | |
1758 | size_t len) | |
1759 | { | |
1760 | unsigned char oob_buf[64]; | |
1761 | size_t retlen; | |
1762 | int ret; | |
1763 | ||
1764 | memset(oob_buf, 0xff, mtd->oobsize); | |
1765 | /* | |
1766 | * Note: OTP lock operation | |
1767 | * OTP block : 0xXXFC | |
1768 | * 1st block : 0xXXF3 (If chip support) | |
1769 | * Both : 0xXXF0 (If chip support) | |
1770 | */ | |
1771 | oob_buf[ONENAND_OTP_LOCK_OFFSET] = 0xFC; | |
1772 | ||
1773 | /* | |
1774 | * Write lock mark to 8th word of sector0 of page0 of the spare0. | |
1775 | * We write 16 bytes spare area instead of 2 bytes. | |
1776 | */ | |
1777 | from = 0; | |
1778 | len = 16; | |
1779 | ||
1780 | ret = onenand_otp_walk(mtd, from, len, &retlen, oob_buf, do_otp_lock, MTD_OTP_USER); | |
1781 | ||
1782 | return ret ? : retlen; | |
1783 | } | |
1784 | #endif /* CONFIG_MTD_ONENAND_OTP */ | |
1785 | ||
1786 | /** | |
1787 | * onenand_lock_scheme - Check and set OneNAND lock scheme | |
1788 | * @param mtd MTD data structure | |
1789 | * | |
1790 | * Check and set OneNAND lock scheme | |
1791 | */ | |
1792 | static void onenand_lock_scheme(struct mtd_info *mtd) | |
1793 | { | |
1794 | struct onenand_chip *this = mtd->priv; | |
1795 | unsigned int density, process; | |
1796 | ||
1797 | /* Lock scheme depends on density and process */ | |
1798 | density = this->device_id >> ONENAND_DEVICE_DENSITY_SHIFT; | |
1799 | process = this->version_id >> ONENAND_VERSION_PROCESS_SHIFT; | |
1800 | ||
1801 | /* Lock scheme */ | |
1802 | if (density >= ONENAND_DEVICE_DENSITY_1Gb) { | |
1803 | /* A-Die has all block unlock */ | |
1804 | if (process) { | |
1805 | printk(KERN_DEBUG "Chip support all block unlock\n"); | |
1806 | this->options |= ONENAND_HAS_UNLOCK_ALL; | |
1807 | } | |
1808 | } else { | |
1809 | /* Some OneNAND has continues lock scheme */ | |
1810 | if (!process) { | |
1811 | printk(KERN_DEBUG "Lock scheme is Continues Lock\n"); | |
1812 | this->options |= ONENAND_HAS_CONT_LOCK; | |
1813 | } | |
1814 | } | |
1815 | } | |
1816 | ||
1817 | /** | |
1818 | * onenand_print_device_info - Print device ID | |
1819 | * @param device device ID | |
1820 | * | |
1821 | * Print device ID | |
1822 | */ | |
1823 | static void onenand_print_device_info(int device, int version) | |
1824 | { | |
1825 | int vcc, demuxed, ddp, density; | |
1826 | ||
1827 | vcc = device & ONENAND_DEVICE_VCC_MASK; | |
1828 | demuxed = device & ONENAND_DEVICE_IS_DEMUX; | |
1829 | ddp = device & ONENAND_DEVICE_IS_DDP; | |
1830 | density = device >> ONENAND_DEVICE_DENSITY_SHIFT; | |
1831 | printk(KERN_INFO "%sOneNAND%s %dMB %sV 16-bit (0x%02x)\n", | |
1832 | demuxed ? "" : "Muxed ", | |
1833 | ddp ? "(DDP)" : "", | |
1834 | (16 << density), | |
1835 | vcc ? "2.65/3.3" : "1.8", | |
1836 | device); | |
1837 | printk(KERN_DEBUG "OneNAND version = 0x%04x\n", version); | |
1838 | } | |
1839 | ||
1840 | static const struct onenand_manufacturers onenand_manuf_ids[] = { | |
1841 | {ONENAND_MFR_SAMSUNG, "Samsung"}, | |
1842 | }; | |
1843 | ||
1844 | /** | |
1845 | * onenand_check_maf - Check manufacturer ID | |
1846 | * @param manuf manufacturer ID | |
1847 | * | |
1848 | * Check manufacturer ID | |
1849 | */ | |
1850 | static int onenand_check_maf(int manuf) | |
1851 | { | |
1852 | int size = ARRAY_SIZE(onenand_manuf_ids); | |
1853 | char *name; | |
1854 | int i; | |
1855 | ||
1856 | for (i = 0; i < size; i++) | |
1857 | if (manuf == onenand_manuf_ids[i].id) | |
1858 | break; | |
1859 | ||
1860 | if (i < size) | |
1861 | name = onenand_manuf_ids[i].name; | |
1862 | else | |
1863 | name = "Unknown"; | |
1864 | ||
1865 | printk(KERN_DEBUG "OneNAND Manufacturer: %s (0x%0x)\n", name, manuf); | |
1866 | ||
1867 | return (i == size); | |
1868 | } | |
1869 | ||
1870 | /** | |
1871 | * onenand_probe - [OneNAND Interface] Probe the OneNAND device | |
1872 | * @param mtd MTD device structure | |
1873 | * | |
1874 | * OneNAND detection method: | |
1875 | * Compare the the values from command with ones from register | |
1876 | */ | |
1877 | static int onenand_probe(struct mtd_info *mtd) | |
1878 | { | |
1879 | struct onenand_chip *this = mtd->priv; | |
1880 | int bram_maf_id, bram_dev_id, maf_id, dev_id, ver_id; | |
1881 | int density; | |
1882 | int syscfg; | |
1883 | ||
1884 | /* Save system configuration 1 */ | |
1885 | syscfg = this->read_word(this->base + ONENAND_REG_SYS_CFG1); | |
1886 | /* Clear Sync. Burst Read mode to read BootRAM */ | |
1887 | this->write_word((syscfg & ~ONENAND_SYS_CFG1_SYNC_READ), this->base + ONENAND_REG_SYS_CFG1); | |
1888 | ||
1889 | /* Send the command for reading device ID from BootRAM */ | |
1890 | this->write_word(ONENAND_CMD_READID, this->base + ONENAND_BOOTRAM); | |
1891 | ||
1892 | /* Read manufacturer and device IDs from BootRAM */ | |
1893 | bram_maf_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x0); | |
1894 | bram_dev_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x2); | |
1895 | ||
1896 | /* Reset OneNAND to read default register values */ | |
1897 | this->write_word(ONENAND_CMD_RESET, this->base + ONENAND_BOOTRAM); | |
1898 | /* Wait reset */ | |
1899 | this->wait(mtd, FL_RESETING); | |
1900 | ||
1901 | /* Restore system configuration 1 */ | |
1902 | this->write_word(syscfg, this->base + ONENAND_REG_SYS_CFG1); | |
1903 | ||
1904 | /* Check manufacturer ID */ | |
1905 | if (onenand_check_maf(bram_maf_id)) | |
1906 | return -ENXIO; | |
1907 | ||
1908 | /* Read manufacturer and device IDs from Register */ | |
1909 | maf_id = this->read_word(this->base + ONENAND_REG_MANUFACTURER_ID); | |
1910 | dev_id = this->read_word(this->base + ONENAND_REG_DEVICE_ID); | |
1911 | ver_id = this->read_word(this->base + ONENAND_REG_VERSION_ID); | |
1912 | ||
1913 | /* Check OneNAND device */ | |
1914 | if (maf_id != bram_maf_id || dev_id != bram_dev_id) | |
1915 | return -ENXIO; | |
1916 | ||
1917 | /* Flash device information */ | |
1918 | onenand_print_device_info(dev_id, ver_id); | |
1919 | this->device_id = dev_id; | |
1920 | this->version_id = ver_id; | |
1921 | ||
1922 | density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT; | |
1923 | this->chipsize = (16 << density) << 20; | |
1924 | /* Set density mask. it is used for DDP */ | |
1925 | this->density_mask = (1 << (density + 6)); | |
1926 | ||
1927 | /* OneNAND page size & block size */ | |
1928 | /* The data buffer size is equal to page size */ | |
1929 | mtd->writesize = this->read_word(this->base + ONENAND_REG_DATA_BUFFER_SIZE); | |
1930 | mtd->oobsize = mtd->writesize >> 5; | |
1931 | /* Pagers per block is always 64 in OneNAND */ | |
1932 | mtd->erasesize = mtd->writesize << 6; | |
1933 | ||
1934 | this->erase_shift = ffs(mtd->erasesize) - 1; | |
1935 | this->page_shift = ffs(mtd->writesize) - 1; | |
1936 | this->ppb_shift = (this->erase_shift - this->page_shift); | |
1937 | this->page_mask = (mtd->erasesize / mtd->writesize) - 1; | |
1938 | ||
1939 | /* REVIST: Multichip handling */ | |
1940 | ||
1941 | mtd->size = this->chipsize; | |
1942 | ||
1943 | /* Check OneNAND lock scheme */ | |
1944 | onenand_lock_scheme(mtd); | |
1945 | ||
1946 | return 0; | |
1947 | } | |
1948 | ||
1949 | /** | |
1950 | * onenand_suspend - [MTD Interface] Suspend the OneNAND flash | |
1951 | * @param mtd MTD device structure | |
1952 | */ | |
1953 | static int onenand_suspend(struct mtd_info *mtd) | |
1954 | { | |
1955 | return onenand_get_device(mtd, FL_PM_SUSPENDED); | |
1956 | } | |
1957 | ||
1958 | /** | |
1959 | * onenand_resume - [MTD Interface] Resume the OneNAND flash | |
1960 | * @param mtd MTD device structure | |
1961 | */ | |
1962 | static void onenand_resume(struct mtd_info *mtd) | |
1963 | { | |
1964 | struct onenand_chip *this = mtd->priv; | |
1965 | ||
1966 | if (this->state == FL_PM_SUSPENDED) | |
1967 | onenand_release_device(mtd); | |
1968 | else | |
1969 | printk(KERN_ERR "resume() called for the chip which is not" | |
1970 | "in suspended state\n"); | |
1971 | } | |
1972 | ||
1973 | /** | |
1974 | * onenand_scan - [OneNAND Interface] Scan for the OneNAND device | |
1975 | * @param mtd MTD device structure | |
1976 | * @param maxchips Number of chips to scan for | |
1977 | * | |
1978 | * This fills out all the not initialized function pointers | |
1979 | * with the defaults. | |
1980 | * The flash ID is read and the mtd/chip structures are | |
1981 | * filled with the appropriate values. | |
1982 | */ | |
1983 | int onenand_scan(struct mtd_info *mtd, int maxchips) | |
1984 | { | |
1985 | struct onenand_chip *this = mtd->priv; | |
1986 | ||
1987 | if (!this->read_word) | |
1988 | this->read_word = onenand_readw; | |
1989 | if (!this->write_word) | |
1990 | this->write_word = onenand_writew; | |
1991 | ||
1992 | if (!this->command) | |
1993 | this->command = onenand_command; | |
1994 | if (!this->wait) | |
1995 | onenand_setup_wait(mtd); | |
1996 | ||
1997 | if (!this->read_bufferram) | |
1998 | this->read_bufferram = onenand_read_bufferram; | |
1999 | if (!this->write_bufferram) | |
2000 | this->write_bufferram = onenand_write_bufferram; | |
2001 | ||
2002 | if (!this->block_markbad) | |
2003 | this->block_markbad = onenand_default_block_markbad; | |
2004 | if (!this->scan_bbt) | |
2005 | this->scan_bbt = onenand_default_bbt; | |
2006 | ||
2007 | if (onenand_probe(mtd)) | |
2008 | return -ENXIO; | |
2009 | ||
2010 | /* Set Sync. Burst Read after probing */ | |
2011 | if (this->mmcontrol) { | |
2012 | printk(KERN_INFO "OneNAND Sync. Burst Read support\n"); | |
2013 | this->read_bufferram = onenand_sync_read_bufferram; | |
2014 | } | |
2015 | ||
2016 | /* Allocate buffers, if necessary */ | |
2017 | if (!this->page_buf) { | |
2018 | size_t len; | |
2019 | len = mtd->writesize + mtd->oobsize; | |
2020 | this->page_buf = kmalloc(len, GFP_KERNEL); | |
2021 | if (!this->page_buf) { | |
2022 | printk(KERN_ERR "onenand_scan(): Can't allocate page_buf\n"); | |
2023 | return -ENOMEM; | |
2024 | } | |
2025 | this->options |= ONENAND_PAGEBUF_ALLOC; | |
2026 | } | |
2027 | ||
2028 | this->state = FL_READY; | |
2029 | init_waitqueue_head(&this->wq); | |
2030 | spin_lock_init(&this->chip_lock); | |
2031 | ||
2032 | switch (mtd->oobsize) { | |
2033 | case 64: | |
2034 | this->ecclayout = &onenand_oob_64; | |
2035 | break; | |
2036 | ||
2037 | case 32: | |
2038 | this->ecclayout = &onenand_oob_32; | |
2039 | break; | |
2040 | ||
2041 | default: | |
2042 | printk(KERN_WARNING "No OOB scheme defined for oobsize %d\n", | |
2043 | mtd->oobsize); | |
2044 | /* To prevent kernel oops */ | |
2045 | this->ecclayout = &onenand_oob_32; | |
2046 | break; | |
2047 | } | |
2048 | ||
2049 | mtd->ecclayout = this->ecclayout; | |
2050 | ||
2051 | /* Fill in remaining MTD driver data */ | |
2052 | mtd->type = MTD_NANDFLASH; | |
2053 | mtd->flags = MTD_CAP_NANDFLASH; | |
2054 | mtd->ecctype = MTD_ECC_SW; | |
2055 | mtd->erase = onenand_erase; | |
2056 | mtd->point = NULL; | |
2057 | mtd->unpoint = NULL; | |
2058 | mtd->read = onenand_read; | |
2059 | mtd->write = onenand_write; | |
2060 | mtd->read_oob = onenand_read_oob; | |
2061 | mtd->write_oob = onenand_write_oob; | |
2062 | #ifdef CONFIG_MTD_ONENAND_OTP | |
2063 | mtd->get_fact_prot_info = onenand_get_fact_prot_info; | |
2064 | mtd->read_fact_prot_reg = onenand_read_fact_prot_reg; | |
2065 | mtd->get_user_prot_info = onenand_get_user_prot_info; | |
2066 | mtd->read_user_prot_reg = onenand_read_user_prot_reg; | |
2067 | mtd->write_user_prot_reg = onenand_write_user_prot_reg; | |
2068 | mtd->lock_user_prot_reg = onenand_lock_user_prot_reg; | |
2069 | #endif | |
2070 | mtd->sync = onenand_sync; | |
2071 | mtd->lock = onenand_lock; | |
2072 | mtd->unlock = onenand_unlock; | |
2073 | mtd->suspend = onenand_suspend; | |
2074 | mtd->resume = onenand_resume; | |
2075 | mtd->block_isbad = onenand_block_isbad; | |
2076 | mtd->block_markbad = onenand_block_markbad; | |
2077 | mtd->owner = THIS_MODULE; | |
2078 | ||
2079 | /* Unlock whole block */ | |
2080 | onenand_unlock_all(mtd); | |
2081 | ||
2082 | return this->scan_bbt(mtd); | |
2083 | } | |
2084 | ||
2085 | /** | |
2086 | * onenand_release - [OneNAND Interface] Free resources held by the OneNAND device | |
2087 | * @param mtd MTD device structure | |
2088 | */ | |
2089 | void onenand_release(struct mtd_info *mtd) | |
2090 | { | |
2091 | struct onenand_chip *this = mtd->priv; | |
2092 | ||
2093 | #ifdef CONFIG_MTD_PARTITIONS | |
2094 | /* Deregister partitions */ | |
2095 | del_mtd_partitions (mtd); | |
2096 | #endif | |
2097 | /* Deregister the device */ | |
2098 | del_mtd_device (mtd); | |
2099 | ||
2100 | /* Free bad block table memory, if allocated */ | |
2101 | if (this->bbm) | |
2102 | kfree(this->bbm); | |
2103 | /* Buffer allocated by onenand_scan */ | |
2104 | if (this->options & ONENAND_PAGEBUF_ALLOC) | |
2105 | kfree(this->page_buf); | |
2106 | } | |
2107 | ||
2108 | EXPORT_SYMBOL_GPL(onenand_scan); | |
2109 | EXPORT_SYMBOL_GPL(onenand_release); | |
2110 | ||
2111 | MODULE_LICENSE("GPL"); | |
2112 | MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>"); | |
2113 | MODULE_DESCRIPTION("Generic OneNAND flash driver code"); |