2 * linux/drivers/mtd/onenand/onenand_base.c
4 * Copyright © 2005-2009 Samsung Electronics
5 * Copyright © 2007 Nokia Corporation
7 * Kyungmin Park <kyungmin.park@samsung.com>
10 * Adrian Hunter <ext-adrian.hunter@nokia.com>:
11 * auto-placement support, read-while load support, various fixes
13 * Vishak G <vishak.g at samsung.com>, Rohit Hagargundgi <h.rohit at samsung.com>
14 * Flex-OneNAND support
15 * Amul Kumar Saha <amul.saha at samsung.com>
18 * This program is free software; you can redistribute it and/or modify
19 * it under the terms of the GNU General Public License version 2 as
20 * published by the Free Software Foundation.
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/slab.h>
27 #include <linux/init.h>
28 #include <linux/sched.h>
29 #include <linux/delay.h>
30 #include <linux/interrupt.h>
31 #include <linux/jiffies.h>
32 #include <linux/mtd/mtd.h>
33 #include <linux/mtd/onenand.h>
34 #include <linux/mtd/partitions.h>
39 * Multiblock erase if number of blocks to erase is 2 or more.
40 * Maximum number of blocks for simultaneous erase is 64.
42 #define MB_ERASE_MIN_BLK_COUNT 2
43 #define MB_ERASE_MAX_BLK_COUNT 64
45 /* Default Flex-OneNAND boundary and lock respectively */
46 static int flex_bdry[MAX_DIES * 2] = { -1, 0, -1, 0 };
48 module_param_array(flex_bdry, int, NULL, 0400);
49 MODULE_PARM_DESC(flex_bdry, "SLC Boundary information for Flex-OneNAND"
50 "Syntax:flex_bdry=DIE_BDRY,LOCK,..."
51 "DIE_BDRY: SLC boundary of the die"
52 "LOCK: Locking information for SLC boundary"
53 " : 0->Set boundary in unlocked status"
54 " : 1->Set boundary in locked status");
56 /* Default OneNAND/Flex-OneNAND OTP options*/
59 module_param(otp, int, 0400);
60 MODULE_PARM_DESC(otp, "Corresponding behaviour of OneNAND in OTP"
61 "Syntax : otp=LOCK_TYPE"
62 "LOCK_TYPE : Keys issued, for specific OTP Lock type"
63 " : 0 -> Default (No Blocks Locked)"
64 " : 1 -> OTP Block lock"
65 " : 2 -> 1st Block lock"
66 " : 3 -> BOTH OTP Block and 1st Block lock");
69 * onenand_oob_128 - oob info for Flex-Onenand with 4KB page
70 * For now, we expose only 64 out of 80 ecc bytes
72 static struct nand_ecclayout onenand_oob_128 = {
75 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
76 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
77 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
78 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
79 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
80 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
84 {2, 4}, {18, 4}, {34, 4}, {50, 4},
85 {66, 4}, {82, 4}, {98, 4}, {114, 4}
90 * onenand_oob_64 - oob info for large (2KB) page
92 static struct nand_ecclayout onenand_oob_64 = {
101 {2, 3}, {14, 2}, {18, 3}, {30, 2},
102 {34, 3}, {46, 2}, {50, 3}, {62, 2}
107 * onenand_oob_32 - oob info for middle (1KB) page
109 static struct nand_ecclayout onenand_oob_32 = {
115 .oobfree = { {2, 3}, {14, 2}, {18, 3}, {30, 2} }
118 static const unsigned char ffchars[] = {
119 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
120 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 16 */
121 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
122 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 32 */
123 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
124 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 48 */
125 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
126 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 64 */
127 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
128 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 80 */
129 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
130 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 96 */
131 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
132 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 112 */
133 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
134 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 128 */
138 * onenand_readw - [OneNAND Interface] Read OneNAND register
139 * @param addr address to read
141 * Read OneNAND register
143 static unsigned short onenand_readw(void __iomem *addr)
149 * onenand_writew - [OneNAND Interface] Write OneNAND register with value
150 * @param value value to write
151 * @param addr address to write
153 * Write OneNAND register with value
155 static void onenand_writew(unsigned short value, void __iomem *addr)
161 * onenand_block_address - [DEFAULT] Get block address
162 * @param this onenand chip data structure
163 * @param block the block
164 * @return translated block address if DDP, otherwise same
166 * Setup Start Address 1 Register (F100h)
168 static int onenand_block_address(struct onenand_chip *this, int block)
170 /* Device Flash Core select, NAND Flash Block Address */
171 if (block & this->density_mask)
172 return ONENAND_DDP_CHIP1 | (block ^ this->density_mask);
178 * onenand_bufferram_address - [DEFAULT] Get bufferram address
179 * @param this onenand chip data structure
180 * @param block the block
181 * @return set DBS value if DDP, otherwise 0
183 * Setup Start Address 2 Register (F101h) for DDP
185 static int onenand_bufferram_address(struct onenand_chip *this, int block)
187 /* Device BufferRAM Select */
188 if (block & this->density_mask)
189 return ONENAND_DDP_CHIP1;
191 return ONENAND_DDP_CHIP0;
195 * onenand_page_address - [DEFAULT] Get page address
196 * @param page the page address
197 * @param sector the sector address
198 * @return combined page and sector address
200 * Setup Start Address 8 Register (F107h)
202 static int onenand_page_address(int page, int sector)
204 /* Flash Page Address, Flash Sector Address */
207 fpa = page & ONENAND_FPA_MASK;
208 fsa = sector & ONENAND_FSA_MASK;
210 return ((fpa << ONENAND_FPA_SHIFT) | fsa);
214 * onenand_buffer_address - [DEFAULT] Get buffer address
215 * @param dataram1 DataRAM index
216 * @param sectors the sector address
217 * @param count the number of sectors
218 * @return the start buffer value
220 * Setup Start Buffer Register (F200h)
222 static int onenand_buffer_address(int dataram1, int sectors, int count)
226 /* BufferRAM Sector Address */
227 bsa = sectors & ONENAND_BSA_MASK;
230 bsa |= ONENAND_BSA_DATARAM1; /* DataRAM1 */
232 bsa |= ONENAND_BSA_DATARAM0; /* DataRAM0 */
234 /* BufferRAM Sector Count */
235 bsc = count & ONENAND_BSC_MASK;
237 return ((bsa << ONENAND_BSA_SHIFT) | bsc);
241 * flexonenand_block- For given address return block number
242 * @param this - OneNAND device structure
243 * @param addr - Address for which block number is needed
245 static unsigned flexonenand_block(struct onenand_chip *this, loff_t addr)
247 unsigned boundary, blk, die = 0;
249 if (ONENAND_IS_DDP(this) && addr >= this->diesize[0]) {
251 addr -= this->diesize[0];
254 boundary = this->boundary[die];
256 blk = addr >> (this->erase_shift - 1);
258 blk = (blk + boundary + 1) >> 1;
260 blk += die ? this->density_mask : 0;
264 inline unsigned onenand_block(struct onenand_chip *this, loff_t addr)
266 if (!FLEXONENAND(this))
267 return addr >> this->erase_shift;
268 return flexonenand_block(this, addr);
272 * flexonenand_addr - Return address of the block
273 * @this: OneNAND device structure
274 * @block: Block number on Flex-OneNAND
276 * Return address of the block
278 static loff_t flexonenand_addr(struct onenand_chip *this, int block)
281 int die = 0, boundary;
283 if (ONENAND_IS_DDP(this) && block >= this->density_mask) {
284 block -= this->density_mask;
286 ofs = this->diesize[0];
289 boundary = this->boundary[die];
290 ofs += (loff_t)block << (this->erase_shift - 1);
291 if (block > (boundary + 1))
292 ofs += (loff_t)(block - boundary - 1) << (this->erase_shift - 1);
296 loff_t onenand_addr(struct onenand_chip *this, int block)
298 if (!FLEXONENAND(this))
299 return (loff_t)block << this->erase_shift;
300 return flexonenand_addr(this, block);
302 EXPORT_SYMBOL(onenand_addr);
305 * onenand_get_density - [DEFAULT] Get OneNAND density
306 * @param dev_id OneNAND device ID
308 * Get OneNAND density from device ID
310 static inline int onenand_get_density(int dev_id)
312 int density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT;
313 return (density & ONENAND_DEVICE_DENSITY_MASK);
317 * flexonenand_region - [Flex-OneNAND] Return erase region of addr
318 * @param mtd MTD device structure
319 * @param addr address whose erase region needs to be identified
321 int flexonenand_region(struct mtd_info *mtd, loff_t addr)
325 for (i = 0; i < mtd->numeraseregions; i++)
326 if (addr < mtd->eraseregions[i].offset)
330 EXPORT_SYMBOL(flexonenand_region);
333 * onenand_command - [DEFAULT] Send command to OneNAND device
334 * @param mtd MTD device structure
335 * @param cmd the command to be sent
336 * @param addr offset to read from or write to
337 * @param len number of bytes to read or write
339 * Send command to OneNAND device. This function is used for middle/large page
340 * devices (1KB/2KB Bytes per page)
342 static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t len)
344 struct onenand_chip *this = mtd->priv;
345 int value, block, page;
347 /* Address translation */
349 case ONENAND_CMD_UNLOCK:
350 case ONENAND_CMD_LOCK:
351 case ONENAND_CMD_LOCK_TIGHT:
352 case ONENAND_CMD_UNLOCK_ALL:
357 case FLEXONENAND_CMD_PI_ACCESS:
358 /* addr contains die index */
359 block = addr * this->density_mask;
363 case ONENAND_CMD_ERASE:
364 case ONENAND_CMD_MULTIBLOCK_ERASE:
365 case ONENAND_CMD_ERASE_VERIFY:
366 case ONENAND_CMD_BUFFERRAM:
367 case ONENAND_CMD_OTP_ACCESS:
368 block = onenand_block(this, addr);
372 case FLEXONENAND_CMD_READ_PI:
373 cmd = ONENAND_CMD_READ;
374 block = addr * this->density_mask;
379 block = onenand_block(this, addr);
380 if (FLEXONENAND(this))
381 page = (int) (addr - onenand_addr(this, block))>>\
384 page = (int) (addr >> this->page_shift);
385 if (ONENAND_IS_2PLANE(this)) {
386 /* Make the even block number */
388 /* Is it the odd plane? */
389 if (addr & this->writesize)
393 page &= this->page_mask;
397 /* NOTE: The setting order of the registers is very important! */
398 if (cmd == ONENAND_CMD_BUFFERRAM) {
399 /* Select DataRAM for DDP */
400 value = onenand_bufferram_address(this, block);
401 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
403 if (ONENAND_IS_MLC(this) || ONENAND_IS_2PLANE(this) ||
404 ONENAND_IS_4KB_PAGE(this))
405 /* It is always BufferRAM0 */
406 ONENAND_SET_BUFFERRAM0(this);
408 /* Switch to the next data buffer */
409 ONENAND_SET_NEXT_BUFFERRAM(this);
415 /* Write 'DFS, FBA' of Flash */
416 value = onenand_block_address(this, block);
417 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
419 /* Select DataRAM for DDP */
420 value = onenand_bufferram_address(this, block);
421 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
425 /* Now we use page size operation */
426 int sectors = 0, count = 0;
430 case FLEXONENAND_CMD_RECOVER_LSB:
431 case ONENAND_CMD_READ:
432 case ONENAND_CMD_READOOB:
433 if (ONENAND_IS_MLC(this) || ONENAND_IS_4KB_PAGE(this))
434 /* It is always BufferRAM0 */
435 dataram = ONENAND_SET_BUFFERRAM0(this);
437 dataram = ONENAND_SET_NEXT_BUFFERRAM(this);
441 if (ONENAND_IS_2PLANE(this) && cmd == ONENAND_CMD_PROG)
442 cmd = ONENAND_CMD_2X_PROG;
443 dataram = ONENAND_CURRENT_BUFFERRAM(this);
447 /* Write 'FPA, FSA' of Flash */
448 value = onenand_page_address(page, sectors);
449 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS8);
451 /* Write 'BSA, BSC' of DataRAM */
452 value = onenand_buffer_address(dataram, sectors, count);
453 this->write_word(value, this->base + ONENAND_REG_START_BUFFER);
456 /* Interrupt clear */
457 this->write_word(ONENAND_INT_CLEAR, this->base + ONENAND_REG_INTERRUPT);
460 this->write_word(cmd, this->base + ONENAND_REG_COMMAND);
466 * onenand_read_ecc - return ecc status
467 * @param this onenand chip structure
469 static inline int onenand_read_ecc(struct onenand_chip *this)
471 int ecc, i, result = 0;
473 if (!FLEXONENAND(this) && !ONENAND_IS_4KB_PAGE(this))
474 return this->read_word(this->base + ONENAND_REG_ECC_STATUS);
476 for (i = 0; i < 4; i++) {
477 ecc = this->read_word(this->base + ONENAND_REG_ECC_STATUS + i*2);
480 if (ecc & FLEXONENAND_UNCORRECTABLE_ERROR)
481 return ONENAND_ECC_2BIT_ALL;
483 result = ONENAND_ECC_1BIT_ALL;
490 * onenand_wait - [DEFAULT] wait until the command is done
491 * @param mtd MTD device structure
492 * @param state state to select the max. timeout value
494 * Wait for command done. This applies to all OneNAND command
495 * Read can take up to 30us, erase up to 2ms and program up to 350us
496 * according to general OneNAND specs
498 static int onenand_wait(struct mtd_info *mtd, int state)
500 struct onenand_chip * this = mtd->priv;
501 unsigned long timeout;
502 unsigned int flags = ONENAND_INT_MASTER;
503 unsigned int interrupt = 0;
506 /* The 20 msec is enough */
507 timeout = jiffies + msecs_to_jiffies(20);
508 while (time_before(jiffies, timeout)) {
509 interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
511 if (interrupt & flags)
514 if (state != FL_READING && state != FL_PREPARING_ERASE)
517 /* To get correct interrupt status in timeout case */
518 interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
520 ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS);
523 * In the Spec. it checks the controller status first
524 * However if you get the correct information in case of
525 * power off recovery (POR) test, it should read ECC status first
527 if (interrupt & ONENAND_INT_READ) {
528 int ecc = onenand_read_ecc(this);
530 if (ecc & ONENAND_ECC_2BIT_ALL) {
531 printk(KERN_ERR "%s: ECC error = 0x%04x\n",
533 mtd->ecc_stats.failed++;
535 } else if (ecc & ONENAND_ECC_1BIT_ALL) {
536 printk(KERN_DEBUG "%s: correctable ECC error = 0x%04x\n",
538 mtd->ecc_stats.corrected++;
541 } else if (state == FL_READING) {
542 printk(KERN_ERR "%s: read timeout! ctrl=0x%04x intr=0x%04x\n",
543 __func__, ctrl, interrupt);
547 if (state == FL_PREPARING_ERASE && !(interrupt & ONENAND_INT_ERASE)) {
548 printk(KERN_ERR "%s: mb erase timeout! ctrl=0x%04x intr=0x%04x\n",
549 __func__, ctrl, interrupt);
553 if (!(interrupt & ONENAND_INT_MASTER)) {
554 printk(KERN_ERR "%s: timeout! ctrl=0x%04x intr=0x%04x\n",
555 __func__, ctrl, interrupt);
559 /* If there's controller error, it's a real error */
560 if (ctrl & ONENAND_CTRL_ERROR) {
561 printk(KERN_ERR "%s: controller error = 0x%04x\n",
563 if (ctrl & ONENAND_CTRL_LOCK)
564 printk(KERN_ERR "%s: it's locked error.\n", __func__);
572 * onenand_interrupt - [DEFAULT] onenand interrupt handler
573 * @param irq onenand interrupt number
574 * @param dev_id interrupt data
578 static irqreturn_t onenand_interrupt(int irq, void *data)
580 struct onenand_chip *this = data;
582 /* To handle shared interrupt */
583 if (!this->complete.done)
584 complete(&this->complete);
590 * onenand_interrupt_wait - [DEFAULT] wait until the command is done
591 * @param mtd MTD device structure
592 * @param state state to select the max. timeout value
594 * Wait for command done.
596 static int onenand_interrupt_wait(struct mtd_info *mtd, int state)
598 struct onenand_chip *this = mtd->priv;
600 wait_for_completion(&this->complete);
602 return onenand_wait(mtd, state);
606 * onenand_try_interrupt_wait - [DEFAULT] try interrupt wait
607 * @param mtd MTD device structure
608 * @param state state to select the max. timeout value
610 * Try interrupt based wait (It is used one-time)
612 static int onenand_try_interrupt_wait(struct mtd_info *mtd, int state)
614 struct onenand_chip *this = mtd->priv;
615 unsigned long remain, timeout;
617 /* We use interrupt wait first */
618 this->wait = onenand_interrupt_wait;
620 timeout = msecs_to_jiffies(100);
621 remain = wait_for_completion_timeout(&this->complete, timeout);
623 printk(KERN_INFO "OneNAND: There's no interrupt. "
624 "We use the normal wait\n");
626 /* Release the irq */
627 free_irq(this->irq, this);
629 this->wait = onenand_wait;
632 return onenand_wait(mtd, state);
636 * onenand_setup_wait - [OneNAND Interface] setup onenand wait method
637 * @param mtd MTD device structure
639 * There's two method to wait onenand work
640 * 1. polling - read interrupt status register
641 * 2. interrupt - use the kernel interrupt method
643 static void onenand_setup_wait(struct mtd_info *mtd)
645 struct onenand_chip *this = mtd->priv;
648 init_completion(&this->complete);
650 if (this->irq <= 0) {
651 this->wait = onenand_wait;
655 if (request_irq(this->irq, &onenand_interrupt,
656 IRQF_SHARED, "onenand", this)) {
657 /* If we can't get irq, use the normal wait */
658 this->wait = onenand_wait;
662 /* Enable interrupt */
663 syscfg = this->read_word(this->base + ONENAND_REG_SYS_CFG1);
664 syscfg |= ONENAND_SYS_CFG1_IOBE;
665 this->write_word(syscfg, this->base + ONENAND_REG_SYS_CFG1);
667 this->wait = onenand_try_interrupt_wait;
671 * onenand_bufferram_offset - [DEFAULT] BufferRAM offset
672 * @param mtd MTD data structure
673 * @param area BufferRAM area
674 * @return offset given area
676 * Return BufferRAM offset given area
678 static inline int onenand_bufferram_offset(struct mtd_info *mtd, int area)
680 struct onenand_chip *this = mtd->priv;
682 if (ONENAND_CURRENT_BUFFERRAM(this)) {
683 /* Note: the 'this->writesize' is a real page size */
684 if (area == ONENAND_DATARAM)
685 return this->writesize;
686 if (area == ONENAND_SPARERAM)
694 * onenand_read_bufferram - [OneNAND Interface] Read the bufferram area
695 * @param mtd MTD data structure
696 * @param area BufferRAM area
697 * @param buffer the databuffer to put/get data
698 * @param offset offset to read from or write to
699 * @param count number of bytes to read/write
701 * Read the BufferRAM area
703 static int onenand_read_bufferram(struct mtd_info *mtd, int area,
704 unsigned char *buffer, int offset, size_t count)
706 struct onenand_chip *this = mtd->priv;
707 void __iomem *bufferram;
709 bufferram = this->base + area;
711 bufferram += onenand_bufferram_offset(mtd, area);
713 if (ONENAND_CHECK_BYTE_ACCESS(count)) {
716 /* Align with word(16-bit) size */
719 /* Read word and save byte */
720 word = this->read_word(bufferram + offset + count);
721 buffer[count] = (word & 0xff);
724 memcpy(buffer, bufferram + offset, count);
730 * onenand_sync_read_bufferram - [OneNAND Interface] Read the bufferram area with Sync. Burst mode
731 * @param mtd MTD data structure
732 * @param area BufferRAM area
733 * @param buffer the databuffer to put/get data
734 * @param offset offset to read from or write to
735 * @param count number of bytes to read/write
737 * Read the BufferRAM area with Sync. Burst Mode
739 static int onenand_sync_read_bufferram(struct mtd_info *mtd, int area,
740 unsigned char *buffer, int offset, size_t count)
742 struct onenand_chip *this = mtd->priv;
743 void __iomem *bufferram;
745 bufferram = this->base + area;
747 bufferram += onenand_bufferram_offset(mtd, area);
749 this->mmcontrol(mtd, ONENAND_SYS_CFG1_SYNC_READ);
751 if (ONENAND_CHECK_BYTE_ACCESS(count)) {
754 /* Align with word(16-bit) size */
757 /* Read word and save byte */
758 word = this->read_word(bufferram + offset + count);
759 buffer[count] = (word & 0xff);
762 memcpy(buffer, bufferram + offset, count);
764 this->mmcontrol(mtd, 0);
770 * onenand_write_bufferram - [OneNAND Interface] Write the bufferram area
771 * @param mtd MTD data structure
772 * @param area BufferRAM area
773 * @param buffer the databuffer to put/get data
774 * @param offset offset to read from or write to
775 * @param count number of bytes to read/write
777 * Write the BufferRAM area
779 static int onenand_write_bufferram(struct mtd_info *mtd, int area,
780 const unsigned char *buffer, int offset, size_t count)
782 struct onenand_chip *this = mtd->priv;
783 void __iomem *bufferram;
785 bufferram = this->base + area;
787 bufferram += onenand_bufferram_offset(mtd, area);
789 if (ONENAND_CHECK_BYTE_ACCESS(count)) {
793 /* Align with word(16-bit) size */
796 /* Calculate byte access offset */
797 byte_offset = offset + count;
799 /* Read word and save byte */
800 word = this->read_word(bufferram + byte_offset);
801 word = (word & ~0xff) | buffer[count];
802 this->write_word(word, bufferram + byte_offset);
805 memcpy(bufferram + offset, buffer, count);
811 * onenand_get_2x_blockpage - [GENERIC] Get blockpage at 2x program mode
812 * @param mtd MTD data structure
813 * @param addr address to check
814 * @return blockpage address
816 * Get blockpage address at 2x program mode
818 static int onenand_get_2x_blockpage(struct mtd_info *mtd, loff_t addr)
820 struct onenand_chip *this = mtd->priv;
821 int blockpage, block, page;
823 /* Calculate the even block number */
824 block = (int) (addr >> this->erase_shift) & ~1;
825 /* Is it the odd plane? */
826 if (addr & this->writesize)
828 page = (int) (addr >> (this->page_shift + 1)) & this->page_mask;
829 blockpage = (block << 7) | page;
835 * onenand_check_bufferram - [GENERIC] Check BufferRAM information
836 * @param mtd MTD data structure
837 * @param addr address to check
838 * @return 1 if there are valid data, otherwise 0
840 * Check bufferram if there is data we required
842 static int onenand_check_bufferram(struct mtd_info *mtd, loff_t addr)
844 struct onenand_chip *this = mtd->priv;
845 int blockpage, found = 0;
848 if (ONENAND_IS_2PLANE(this))
849 blockpage = onenand_get_2x_blockpage(mtd, addr);
851 blockpage = (int) (addr >> this->page_shift);
853 /* Is there valid data? */
854 i = ONENAND_CURRENT_BUFFERRAM(this);
855 if (this->bufferram[i].blockpage == blockpage)
858 /* Check another BufferRAM */
859 i = ONENAND_NEXT_BUFFERRAM(this);
860 if (this->bufferram[i].blockpage == blockpage) {
861 ONENAND_SET_NEXT_BUFFERRAM(this);
866 if (found && ONENAND_IS_DDP(this)) {
867 /* Select DataRAM for DDP */
868 int block = onenand_block(this, addr);
869 int value = onenand_bufferram_address(this, block);
870 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
877 * onenand_update_bufferram - [GENERIC] Update BufferRAM information
878 * @param mtd MTD data structure
879 * @param addr address to update
880 * @param valid valid flag
882 * Update BufferRAM information
884 static void onenand_update_bufferram(struct mtd_info *mtd, loff_t addr,
887 struct onenand_chip *this = mtd->priv;
891 if (ONENAND_IS_2PLANE(this))
892 blockpage = onenand_get_2x_blockpage(mtd, addr);
894 blockpage = (int) (addr >> this->page_shift);
896 /* Invalidate another BufferRAM */
897 i = ONENAND_NEXT_BUFFERRAM(this);
898 if (this->bufferram[i].blockpage == blockpage)
899 this->bufferram[i].blockpage = -1;
901 /* Update BufferRAM */
902 i = ONENAND_CURRENT_BUFFERRAM(this);
904 this->bufferram[i].blockpage = blockpage;
906 this->bufferram[i].blockpage = -1;
910 * onenand_invalidate_bufferram - [GENERIC] Invalidate BufferRAM information
911 * @param mtd MTD data structure
912 * @param addr start address to invalidate
913 * @param len length to invalidate
915 * Invalidate BufferRAM information
917 static void onenand_invalidate_bufferram(struct mtd_info *mtd, loff_t addr,
920 struct onenand_chip *this = mtd->priv;
922 loff_t end_addr = addr + len;
924 /* Invalidate BufferRAM */
925 for (i = 0; i < MAX_BUFFERRAM; i++) {
926 loff_t buf_addr = this->bufferram[i].blockpage << this->page_shift;
927 if (buf_addr >= addr && buf_addr < end_addr)
928 this->bufferram[i].blockpage = -1;
933 * onenand_get_device - [GENERIC] Get chip for selected access
934 * @param mtd MTD device structure
935 * @param new_state the state which is requested
937 * Get the device and lock it for exclusive access
939 static int onenand_get_device(struct mtd_info *mtd, int new_state)
941 struct onenand_chip *this = mtd->priv;
942 DECLARE_WAITQUEUE(wait, current);
945 * Grab the lock and see if the device is available
948 spin_lock(&this->chip_lock);
949 if (this->state == FL_READY) {
950 this->state = new_state;
951 spin_unlock(&this->chip_lock);
954 if (new_state == FL_PM_SUSPENDED) {
955 spin_unlock(&this->chip_lock);
956 return (this->state == FL_PM_SUSPENDED) ? 0 : -EAGAIN;
958 set_current_state(TASK_UNINTERRUPTIBLE);
959 add_wait_queue(&this->wq, &wait);
960 spin_unlock(&this->chip_lock);
962 remove_wait_queue(&this->wq, &wait);
966 clk_enable(this->clk);
972 * onenand_release_device - [GENERIC] release chip
973 * @param mtd MTD device structure
975 * Deselect, release chip lock and wake up anyone waiting on the device
977 static void onenand_release_device(struct mtd_info *mtd)
979 struct onenand_chip *this = mtd->priv;
981 /* Release the chip */
982 spin_lock(&this->chip_lock);
983 this->state = FL_READY;
985 spin_unlock(&this->chip_lock);
988 clk_disable(this->clk);
992 * onenand_transfer_auto_oob - [Internal] oob auto-placement transfer
993 * @param mtd MTD device structure
994 * @param buf destination address
995 * @param column oob offset to read from
996 * @param thislen oob length to read
998 static int onenand_transfer_auto_oob(struct mtd_info *mtd, uint8_t *buf, int column,
1001 struct onenand_chip *this = mtd->priv;
1002 struct nand_oobfree *free;
1003 int readcol = column;
1004 int readend = column + thislen;
1007 uint8_t *oob_buf = this->oob_buf;
1009 free = this->ecclayout->oobfree;
1010 for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
1011 if (readcol >= lastgap)
1012 readcol += free->offset - lastgap;
1013 if (readend >= lastgap)
1014 readend += free->offset - lastgap;
1015 lastgap = free->offset + free->length;
1017 this->read_bufferram(mtd, ONENAND_SPARERAM, oob_buf, 0, mtd->oobsize);
1018 free = this->ecclayout->oobfree;
1019 for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
1020 int free_end = free->offset + free->length;
1021 if (free->offset < readend && free_end > readcol) {
1022 int st = max_t(int,free->offset,readcol);
1023 int ed = min_t(int,free_end,readend);
1025 memcpy(buf, oob_buf + st, n);
1027 } else if (column == 0)
1034 * onenand_recover_lsb - [Flex-OneNAND] Recover LSB page data
1035 * @param mtd MTD device structure
1036 * @param addr address to recover
1037 * @param status return value from onenand_wait / onenand_bbt_wait
1039 * MLC NAND Flash cell has paired pages - LSB page and MSB page. LSB page has
1040 * lower page address and MSB page has higher page address in paired pages.
1041 * If power off occurs during MSB page program, the paired LSB page data can
1042 * become corrupt. LSB page recovery read is a way to read LSB page though page
1043 * data are corrupted. When uncorrectable error occurs as a result of LSB page
1044 * read after power up, issue LSB page recovery read.
1046 static int onenand_recover_lsb(struct mtd_info *mtd, loff_t addr, int status)
1048 struct onenand_chip *this = mtd->priv;
1051 /* Recovery is only for Flex-OneNAND */
1052 if (!FLEXONENAND(this))
1055 /* check if we failed due to uncorrectable error */
1056 if (status != -EBADMSG && status != ONENAND_BBT_READ_ECC_ERROR)
1059 /* check if address lies in MLC region */
1060 i = flexonenand_region(mtd, addr);
1061 if (mtd->eraseregions[i].erasesize < (1 << this->erase_shift))
1064 /* We are attempting to reread, so decrement stats.failed
1065 * which was incremented by onenand_wait due to read failure
1067 printk(KERN_INFO "%s: Attempting to recover from uncorrectable read\n",
1069 mtd->ecc_stats.failed--;
1071 /* Issue the LSB page recovery command */
1072 this->command(mtd, FLEXONENAND_CMD_RECOVER_LSB, addr, this->writesize);
1073 return this->wait(mtd, FL_READING);
1077 * onenand_mlc_read_ops_nolock - MLC OneNAND read main and/or out-of-band
1078 * @param mtd MTD device structure
1079 * @param from offset to read from
1080 * @param ops: oob operation description structure
1082 * MLC OneNAND / Flex-OneNAND has 4KB page size and 4KB dataram.
1083 * So, read-while-load is not present.
1085 static int onenand_mlc_read_ops_nolock(struct mtd_info *mtd, loff_t from,
1086 struct mtd_oob_ops *ops)
1088 struct onenand_chip *this = mtd->priv;
1089 struct mtd_ecc_stats stats;
1090 size_t len = ops->len;
1091 size_t ooblen = ops->ooblen;
1092 u_char *buf = ops->datbuf;
1093 u_char *oobbuf = ops->oobbuf;
1094 int read = 0, column, thislen;
1095 int oobread = 0, oobcolumn, thisooblen, oobsize;
1097 int writesize = this->writesize;
1099 DEBUG(MTD_DEBUG_LEVEL3, "%s: from = 0x%08x, len = %i\n",
1100 __func__, (unsigned int) from, (int) len);
1102 if (ops->mode == MTD_OOB_AUTO)
1103 oobsize = this->ecclayout->oobavail;
1105 oobsize = mtd->oobsize;
1107 oobcolumn = from & (mtd->oobsize - 1);
1109 /* Do not allow reads past end of device */
1110 if (from + len > mtd->size) {
1111 printk(KERN_ERR "%s: Attempt read beyond end of device\n",
1118 stats = mtd->ecc_stats;
1120 while (read < len) {
1123 thislen = min_t(int, writesize, len - read);
1125 column = from & (writesize - 1);
1126 if (column + thislen > writesize)
1127 thislen = writesize - column;
1129 if (!onenand_check_bufferram(mtd, from)) {
1130 this->command(mtd, ONENAND_CMD_READ, from, writesize);
1132 ret = this->wait(mtd, FL_READING);
1134 ret = onenand_recover_lsb(mtd, from, ret);
1135 onenand_update_bufferram(mtd, from, !ret);
1136 if (ret == -EBADMSG)
1140 this->read_bufferram(mtd, ONENAND_DATARAM, buf, column, thislen);
1142 thisooblen = oobsize - oobcolumn;
1143 thisooblen = min_t(int, thisooblen, ooblen - oobread);
1145 if (ops->mode == MTD_OOB_AUTO)
1146 onenand_transfer_auto_oob(mtd, oobbuf, oobcolumn, thisooblen);
1148 this->read_bufferram(mtd, ONENAND_SPARERAM, oobbuf, oobcolumn, thisooblen);
1149 oobread += thisooblen;
1150 oobbuf += thisooblen;
1163 * Return success, if no ECC failures, else -EBADMSG
1164 * fs driver will take care of that, because
1165 * retlen == desired len and result == -EBADMSG
1168 ops->oobretlen = oobread;
1173 if (mtd->ecc_stats.failed - stats.failed)
1176 return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0;
1180 * onenand_read_ops_nolock - [OneNAND Interface] OneNAND read main and/or out-of-band
1181 * @param mtd MTD device structure
1182 * @param from offset to read from
1183 * @param ops: oob operation description structure
1185 * OneNAND read main and/or out-of-band data
1187 static int onenand_read_ops_nolock(struct mtd_info *mtd, loff_t from,
1188 struct mtd_oob_ops *ops)
1190 struct onenand_chip *this = mtd->priv;
1191 struct mtd_ecc_stats stats;
1192 size_t len = ops->len;
1193 size_t ooblen = ops->ooblen;
1194 u_char *buf = ops->datbuf;
1195 u_char *oobbuf = ops->oobbuf;
1196 int read = 0, column, thislen;
1197 int oobread = 0, oobcolumn, thisooblen, oobsize;
1198 int ret = 0, boundary = 0;
1199 int writesize = this->writesize;
1201 DEBUG(MTD_DEBUG_LEVEL3, "%s: from = 0x%08x, len = %i\n",
1202 __func__, (unsigned int) from, (int) len);
1204 if (ops->mode == MTD_OOB_AUTO)
1205 oobsize = this->ecclayout->oobavail;
1207 oobsize = mtd->oobsize;
1209 oobcolumn = from & (mtd->oobsize - 1);
1211 /* Do not allow reads past end of device */
1212 if ((from + len) > mtd->size) {
1213 printk(KERN_ERR "%s: Attempt read beyond end of device\n",
1220 stats = mtd->ecc_stats;
1222 /* Read-while-load method */
1224 /* Do first load to bufferRAM */
1226 if (!onenand_check_bufferram(mtd, from)) {
1227 this->command(mtd, ONENAND_CMD_READ, from, writesize);
1228 ret = this->wait(mtd, FL_READING);
1229 onenand_update_bufferram(mtd, from, !ret);
1230 if (ret == -EBADMSG)
1235 thislen = min_t(int, writesize, len - read);
1236 column = from & (writesize - 1);
1237 if (column + thislen > writesize)
1238 thislen = writesize - column;
1241 /* If there is more to load then start next load */
1243 if (read + thislen < len) {
1244 this->command(mtd, ONENAND_CMD_READ, from, writesize);
1246 * Chip boundary handling in DDP
1247 * Now we issued chip 1 read and pointed chip 1
1248 * bufferram so we have to point chip 0 bufferram.
1250 if (ONENAND_IS_DDP(this) &&
1251 unlikely(from == (this->chipsize >> 1))) {
1252 this->write_word(ONENAND_DDP_CHIP0, this->base + ONENAND_REG_START_ADDRESS2);
1256 ONENAND_SET_PREV_BUFFERRAM(this);
1258 /* While load is going, read from last bufferRAM */
1259 this->read_bufferram(mtd, ONENAND_DATARAM, buf, column, thislen);
1261 /* Read oob area if needed */
1263 thisooblen = oobsize - oobcolumn;
1264 thisooblen = min_t(int, thisooblen, ooblen - oobread);
1266 if (ops->mode == MTD_OOB_AUTO)
1267 onenand_transfer_auto_oob(mtd, oobbuf, oobcolumn, thisooblen);
1269 this->read_bufferram(mtd, ONENAND_SPARERAM, oobbuf, oobcolumn, thisooblen);
1270 oobread += thisooblen;
1271 oobbuf += thisooblen;
1275 /* See if we are done */
1279 /* Set up for next read from bufferRAM */
1280 if (unlikely(boundary))
1281 this->write_word(ONENAND_DDP_CHIP1, this->base + ONENAND_REG_START_ADDRESS2);
1282 ONENAND_SET_NEXT_BUFFERRAM(this);
1284 thislen = min_t(int, writesize, len - read);
1287 /* Now wait for load */
1288 ret = this->wait(mtd, FL_READING);
1289 onenand_update_bufferram(mtd, from, !ret);
1290 if (ret == -EBADMSG)
1295 * Return success, if no ECC failures, else -EBADMSG
1296 * fs driver will take care of that, because
1297 * retlen == desired len and result == -EBADMSG
1300 ops->oobretlen = oobread;
1305 if (mtd->ecc_stats.failed - stats.failed)
1308 return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0;
1312 * onenand_read_oob_nolock - [MTD Interface] OneNAND read out-of-band
1313 * @param mtd MTD device structure
1314 * @param from offset to read from
1315 * @param ops: oob operation description structure
1317 * OneNAND read out-of-band data from the spare area
1319 static int onenand_read_oob_nolock(struct mtd_info *mtd, loff_t from,
1320 struct mtd_oob_ops *ops)
1322 struct onenand_chip *this = mtd->priv;
1323 struct mtd_ecc_stats stats;
1324 int read = 0, thislen, column, oobsize;
1325 size_t len = ops->ooblen;
1326 mtd_oob_mode_t mode = ops->mode;
1327 u_char *buf = ops->oobbuf;
1328 int ret = 0, readcmd;
1330 from += ops->ooboffs;
1332 DEBUG(MTD_DEBUG_LEVEL3, "%s: from = 0x%08x, len = %i\n",
1333 __func__, (unsigned int) from, (int) len);
1335 /* Initialize return length value */
1338 if (mode == MTD_OOB_AUTO)
1339 oobsize = this->ecclayout->oobavail;
1341 oobsize = mtd->oobsize;
1343 column = from & (mtd->oobsize - 1);
1345 if (unlikely(column >= oobsize)) {
1346 printk(KERN_ERR "%s: Attempted to start read outside oob\n",
1351 /* Do not allow reads past end of device */
1352 if (unlikely(from >= mtd->size ||
1353 column + len > ((mtd->size >> this->page_shift) -
1354 (from >> this->page_shift)) * oobsize)) {
1355 printk(KERN_ERR "%s: Attempted to read beyond end of device\n",
1360 stats = mtd->ecc_stats;
1362 readcmd = ONENAND_IS_MLC(this) ? ONENAND_CMD_READ : ONENAND_CMD_READOOB;
1364 while (read < len) {
1367 thislen = oobsize - column;
1368 thislen = min_t(int, thislen, len);
1370 this->command(mtd, readcmd, from, mtd->oobsize);
1372 onenand_update_bufferram(mtd, from, 0);
1374 ret = this->wait(mtd, FL_READING);
1376 ret = onenand_recover_lsb(mtd, from, ret);
1378 if (ret && ret != -EBADMSG) {
1379 printk(KERN_ERR "%s: read failed = 0x%x\n",
1384 if (mode == MTD_OOB_AUTO)
1385 onenand_transfer_auto_oob(mtd, buf, column, thislen);
1387 this->read_bufferram(mtd, ONENAND_SPARERAM, buf, column, thislen);
1399 from += mtd->writesize;
1404 ops->oobretlen = read;
1409 if (mtd->ecc_stats.failed - stats.failed)
1416 * onenand_read - [MTD Interface] Read data from flash
1417 * @param mtd MTD device structure
1418 * @param from offset to read from
1419 * @param len number of bytes to read
1420 * @param retlen pointer to variable to store the number of read bytes
1421 * @param buf the databuffer to put data
1425 static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
1426 size_t *retlen, u_char *buf)
1428 struct onenand_chip *this = mtd->priv;
1429 struct mtd_oob_ops ops = {
1437 onenand_get_device(mtd, FL_READING);
1438 ret = ONENAND_IS_MLC(this) || ONENAND_IS_4KB_PAGE(this) ?
1439 onenand_mlc_read_ops_nolock(mtd, from, &ops) :
1440 onenand_read_ops_nolock(mtd, from, &ops);
1441 onenand_release_device(mtd);
1443 *retlen = ops.retlen;
1448 * onenand_read_oob - [MTD Interface] Read main and/or out-of-band
1449 * @param mtd: MTD device structure
1450 * @param from: offset to read from
1451 * @param ops: oob operation description structure
1453 * Read main and/or out-of-band
1455 static int onenand_read_oob(struct mtd_info *mtd, loff_t from,
1456 struct mtd_oob_ops *ops)
1458 struct onenand_chip *this = mtd->priv;
1461 switch (ops->mode) {
1466 /* Not implemented yet */
1471 onenand_get_device(mtd, FL_READING);
1473 ret = ONENAND_IS_MLC(this) || ONENAND_IS_4KB_PAGE(this) ?
1474 onenand_mlc_read_ops_nolock(mtd, from, ops) :
1475 onenand_read_ops_nolock(mtd, from, ops);
1477 ret = onenand_read_oob_nolock(mtd, from, ops);
1478 onenand_release_device(mtd);
1484 * onenand_bbt_wait - [DEFAULT] wait until the command is done
1485 * @param mtd MTD device structure
1486 * @param state state to select the max. timeout value
1488 * Wait for command done.
1490 static int onenand_bbt_wait(struct mtd_info *mtd, int state)
1492 struct onenand_chip *this = mtd->priv;
1493 unsigned long timeout;
1494 unsigned int interrupt;
1497 /* The 20 msec is enough */
1498 timeout = jiffies + msecs_to_jiffies(20);
1499 while (time_before(jiffies, timeout)) {
1500 interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
1501 if (interrupt & ONENAND_INT_MASTER)
1504 /* To get correct interrupt status in timeout case */
1505 interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
1506 ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS);
1508 if (interrupt & ONENAND_INT_READ) {
1509 int ecc = onenand_read_ecc(this);
1510 if (ecc & ONENAND_ECC_2BIT_ALL) {
1511 printk(KERN_WARNING "%s: ecc error = 0x%04x, "
1512 "controller error 0x%04x\n",
1513 __func__, ecc, ctrl);
1514 return ONENAND_BBT_READ_ECC_ERROR;
1517 printk(KERN_ERR "%s: read timeout! ctrl=0x%04x intr=0x%04x\n",
1518 __func__, ctrl, interrupt);
1519 return ONENAND_BBT_READ_FATAL_ERROR;
1522 /* Initial bad block case: 0x2400 or 0x0400 */
1523 if (ctrl & ONENAND_CTRL_ERROR) {
1524 printk(KERN_DEBUG "%s: controller error = 0x%04x\n",
1526 return ONENAND_BBT_READ_ERROR;
1533 * onenand_bbt_read_oob - [MTD Interface] OneNAND read out-of-band for bbt scan
1534 * @param mtd MTD device structure
1535 * @param from offset to read from
1536 * @param ops oob operation description structure
1538 * OneNAND read out-of-band data from the spare area for bbt scan
1540 int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
1541 struct mtd_oob_ops *ops)
1543 struct onenand_chip *this = mtd->priv;
1544 int read = 0, thislen, column;
1545 int ret = 0, readcmd, update;
1546 size_t len = ops->ooblen;
1547 u_char *buf = ops->oobbuf;
1549 DEBUG(MTD_DEBUG_LEVEL3, "%s: from = 0x%08x, len = %zi\n",
1550 __func__, (unsigned int) from, len);
1552 /* Initialize return value */
1555 /* Do not allow reads past end of device */
1556 if (unlikely((from + len) > mtd->size)) {
1557 printk(KERN_ERR "%s: Attempt read beyond end of device\n",
1559 return ONENAND_BBT_READ_FATAL_ERROR;
1562 column = from & (mtd->oobsize - 1);
1564 readcmd = ONENAND_IS_MLC(this) ? ONENAND_CMD_READ : ONENAND_CMD_READOOB;
1567 if (this->options & ONENAND_RUNTIME_BADBLOCK_CHECK) {
1568 readcmd = ONENAND_CMD_READ;
1572 while (read < len) {
1575 thislen = mtd->oobsize - column;
1576 thislen = min_t(int, thislen, len);
1578 this->command(mtd, readcmd, from, mtd->oobsize);
1580 onenand_update_bufferram(mtd, from, update);
1582 ret = this->bbt_wait(mtd, FL_READING);
1584 ret = onenand_recover_lsb(mtd, from, ret);
1589 this->read_bufferram(mtd, ONENAND_SPARERAM, buf, column, thislen);
1598 /* Update Page size */
1599 from += this->writesize;
1604 ops->oobretlen = read;
1608 #ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE
1610 * onenand_verify_oob - [GENERIC] verify the oob contents after a write
1611 * @param mtd MTD device structure
1612 * @param buf the databuffer to verify
1613 * @param to offset to read from
1615 static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to)
1617 struct onenand_chip *this = mtd->priv;
1618 u_char *oob_buf = this->oob_buf;
1619 int status, i, readcmd;
1621 readcmd = ONENAND_IS_MLC(this) ? ONENAND_CMD_READ : ONENAND_CMD_READOOB;
1623 this->command(mtd, readcmd, to, mtd->oobsize);
1624 onenand_update_bufferram(mtd, to, 0);
1625 status = this->wait(mtd, FL_READING);
1629 this->read_bufferram(mtd, ONENAND_SPARERAM, oob_buf, 0, mtd->oobsize);
1630 for (i = 0; i < mtd->oobsize; i++)
1631 if (buf[i] != 0xFF && buf[i] != oob_buf[i])
1638 * onenand_verify - [GENERIC] verify the chip contents after a write
1639 * @param mtd MTD device structure
1640 * @param buf the databuffer to verify
1641 * @param addr offset to read from
1642 * @param len number of bytes to read and compare
1644 static int onenand_verify(struct mtd_info *mtd, const u_char *buf, loff_t addr, size_t len)
1646 struct onenand_chip *this = mtd->priv;
1648 int thislen, column;
1651 thislen = min_t(int, this->writesize, len);
1652 column = addr & (this->writesize - 1);
1653 if (column + thislen > this->writesize)
1654 thislen = this->writesize - column;
1656 this->command(mtd, ONENAND_CMD_READ, addr, this->writesize);
1658 onenand_update_bufferram(mtd, addr, 0);
1660 ret = this->wait(mtd, FL_READING);
1664 onenand_update_bufferram(mtd, addr, 1);
1666 this->read_bufferram(mtd, ONENAND_DATARAM, this->verify_buf, 0, mtd->writesize);
1668 if (memcmp(buf, this->verify_buf, thislen))
1679 #define onenand_verify(...) (0)
1680 #define onenand_verify_oob(...) (0)
1683 #define NOTALIGNED(x) ((x & (this->subpagesize - 1)) != 0)
1685 static void onenand_panic_wait(struct mtd_info *mtd)
1687 struct onenand_chip *this = mtd->priv;
1688 unsigned int interrupt;
1691 for (i = 0; i < 2000; i++) {
1692 interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
1693 if (interrupt & ONENAND_INT_MASTER)
1700 * onenand_panic_write - [MTD Interface] write buffer to FLASH in a panic context
1701 * @param mtd MTD device structure
1702 * @param to offset to write to
1703 * @param len number of bytes to write
1704 * @param retlen pointer to variable to store the number of written bytes
1705 * @param buf the data to write
1709 static int onenand_panic_write(struct mtd_info *mtd, loff_t to, size_t len,
1710 size_t *retlen, const u_char *buf)
1712 struct onenand_chip *this = mtd->priv;
1713 int column, subpage;
1717 if (this->state == FL_PM_SUSPENDED)
1720 /* Wait for any existing operation to clear */
1721 onenand_panic_wait(mtd);
1723 DEBUG(MTD_DEBUG_LEVEL3, "%s: to = 0x%08x, len = %i\n",
1724 __func__, (unsigned int) to, (int) len);
1726 /* Initialize retlen, in case of early exit */
1729 /* Do not allow writes past end of device */
1730 if (unlikely((to + len) > mtd->size)) {
1731 printk(KERN_ERR "%s: Attempt write to past end of device\n",
1736 /* Reject writes, which are not page aligned */
1737 if (unlikely(NOTALIGNED(to) || NOTALIGNED(len))) {
1738 printk(KERN_ERR "%s: Attempt to write not page aligned data\n",
1743 column = to & (mtd->writesize - 1);
1745 /* Loop until all data write */
1746 while (written < len) {
1747 int thislen = min_t(int, mtd->writesize - column, len - written);
1748 u_char *wbuf = (u_char *) buf;
1750 this->command(mtd, ONENAND_CMD_BUFFERRAM, to, thislen);
1752 /* Partial page write */
1753 subpage = thislen < mtd->writesize;
1755 memset(this->page_buf, 0xff, mtd->writesize);
1756 memcpy(this->page_buf + column, buf, thislen);
1757 wbuf = this->page_buf;
1760 this->write_bufferram(mtd, ONENAND_DATARAM, wbuf, 0, mtd->writesize);
1761 this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 0, mtd->oobsize);
1763 this->command(mtd, ONENAND_CMD_PROG, to, mtd->writesize);
1765 onenand_panic_wait(mtd);
1767 /* In partial page write we don't update bufferram */
1768 onenand_update_bufferram(mtd, to, !ret && !subpage);
1769 if (ONENAND_IS_2PLANE(this)) {
1770 ONENAND_SET_BUFFERRAM1(this);
1771 onenand_update_bufferram(mtd, to + this->writesize, !ret && !subpage);
1775 printk(KERN_ERR "%s: write failed %d\n", __func__, ret);
1794 * onenand_fill_auto_oob - [Internal] oob auto-placement transfer
1795 * @param mtd MTD device structure
1796 * @param oob_buf oob buffer
1797 * @param buf source address
1798 * @param column oob offset to write to
1799 * @param thislen oob length to write
1801 static int onenand_fill_auto_oob(struct mtd_info *mtd, u_char *oob_buf,
1802 const u_char *buf, int column, int thislen)
1804 struct onenand_chip *this = mtd->priv;
1805 struct nand_oobfree *free;
1806 int writecol = column;
1807 int writeend = column + thislen;
1811 free = this->ecclayout->oobfree;
1812 for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
1813 if (writecol >= lastgap)
1814 writecol += free->offset - lastgap;
1815 if (writeend >= lastgap)
1816 writeend += free->offset - lastgap;
1817 lastgap = free->offset + free->length;
1819 free = this->ecclayout->oobfree;
1820 for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
1821 int free_end = free->offset + free->length;
1822 if (free->offset < writeend && free_end > writecol) {
1823 int st = max_t(int,free->offset,writecol);
1824 int ed = min_t(int,free_end,writeend);
1826 memcpy(oob_buf + st, buf, n);
1828 } else if (column == 0)
1835 * onenand_write_ops_nolock - [OneNAND Interface] write main and/or out-of-band
1836 * @param mtd MTD device structure
1837 * @param to offset to write to
1838 * @param ops oob operation description structure
1840 * Write main and/or oob with ECC
1842 static int onenand_write_ops_nolock(struct mtd_info *mtd, loff_t to,
1843 struct mtd_oob_ops *ops)
1845 struct onenand_chip *this = mtd->priv;
1846 int written = 0, column, thislen = 0, subpage = 0;
1847 int prev = 0, prevlen = 0, prev_subpage = 0, first = 1;
1848 int oobwritten = 0, oobcolumn, thisooblen, oobsize;
1849 size_t len = ops->len;
1850 size_t ooblen = ops->ooblen;
1851 const u_char *buf = ops->datbuf;
1852 const u_char *oob = ops->oobbuf;
1856 DEBUG(MTD_DEBUG_LEVEL3, "%s: to = 0x%08x, len = %i\n",
1857 __func__, (unsigned int) to, (int) len);
1859 /* Initialize retlen, in case of early exit */
1863 /* Do not allow writes past end of device */
1864 if (unlikely((to + len) > mtd->size)) {
1865 printk(KERN_ERR "%s: Attempt write to past end of device\n",
1870 /* Reject writes, which are not page aligned */
1871 if (unlikely(NOTALIGNED(to) || NOTALIGNED(len))) {
1872 printk(KERN_ERR "%s: Attempt to write not page aligned data\n",
1877 /* Check zero length */
1881 if (ops->mode == MTD_OOB_AUTO)
1882 oobsize = this->ecclayout->oobavail;
1884 oobsize = mtd->oobsize;
1886 oobcolumn = to & (mtd->oobsize - 1);
1888 column = to & (mtd->writesize - 1);
1890 /* Loop until all data write */
1892 if (written < len) {
1893 u_char *wbuf = (u_char *) buf;
1895 thislen = min_t(int, mtd->writesize - column, len - written);
1896 thisooblen = min_t(int, oobsize - oobcolumn, ooblen - oobwritten);
1900 this->command(mtd, ONENAND_CMD_BUFFERRAM, to, thislen);
1902 /* Partial page write */
1903 subpage = thislen < mtd->writesize;
1905 memset(this->page_buf, 0xff, mtd->writesize);
1906 memcpy(this->page_buf + column, buf, thislen);
1907 wbuf = this->page_buf;
1910 this->write_bufferram(mtd, ONENAND_DATARAM, wbuf, 0, mtd->writesize);
1913 oobbuf = this->oob_buf;
1915 /* We send data to spare ram with oobsize
1916 * to prevent byte access */
1917 memset(oobbuf, 0xff, mtd->oobsize);
1918 if (ops->mode == MTD_OOB_AUTO)
1919 onenand_fill_auto_oob(mtd, oobbuf, oob, oobcolumn, thisooblen);
1921 memcpy(oobbuf + oobcolumn, oob, thisooblen);
1923 oobwritten += thisooblen;
1927 oobbuf = (u_char *) ffchars;
1929 this->write_bufferram(mtd, ONENAND_SPARERAM, oobbuf, 0, mtd->oobsize);
1931 ONENAND_SET_NEXT_BUFFERRAM(this);
1934 * 2 PLANE, MLC, and Flex-OneNAND do not support
1935 * write-while-program feature.
1937 if (!ONENAND_IS_2PLANE(this) && !ONENAND_IS_4KB_PAGE(this) && !first) {
1938 ONENAND_SET_PREV_BUFFERRAM(this);
1940 ret = this->wait(mtd, FL_WRITING);
1942 /* In partial page write we don't update bufferram */
1943 onenand_update_bufferram(mtd, prev, !ret && !prev_subpage);
1946 printk(KERN_ERR "%s: write failed %d\n",
1951 if (written == len) {
1952 /* Only check verify write turn on */
1953 ret = onenand_verify(mtd, buf - len, to - len, len);
1955 printk(KERN_ERR "%s: verify failed %d\n",
1960 ONENAND_SET_NEXT_BUFFERRAM(this);
1963 this->command(mtd, ONENAND_CMD_PROG, to, mtd->writesize);
1966 * 2 PLANE, MLC, and Flex-OneNAND wait here
1968 if (ONENAND_IS_2PLANE(this) || ONENAND_IS_4KB_PAGE(this)) {
1969 ret = this->wait(mtd, FL_WRITING);
1971 /* In partial page write we don't update bufferram */
1972 onenand_update_bufferram(mtd, to, !ret && !subpage);
1974 printk(KERN_ERR "%s: write failed %d\n",
1979 /* Only check verify write turn on */
1980 ret = onenand_verify(mtd, buf, to, thislen);
1982 printk(KERN_ERR "%s: verify failed %d\n",
1996 prev_subpage = subpage;
2004 /* In error case, clear all bufferrams */
2006 onenand_invalidate_bufferram(mtd, 0, -1);
2008 ops->retlen = written;
2009 ops->oobretlen = oobwritten;
2016 * onenand_write_oob_nolock - [Internal] OneNAND write out-of-band
2017 * @param mtd MTD device structure
2018 * @param to offset to write to
2019 * @param len number of bytes to write
2020 * @param retlen pointer to variable to store the number of written bytes
2021 * @param buf the data to write
2022 * @param mode operation mode
2024 * OneNAND write out-of-band
2026 static int onenand_write_oob_nolock(struct mtd_info *mtd, loff_t to,
2027 struct mtd_oob_ops *ops)
2029 struct onenand_chip *this = mtd->priv;
2030 int column, ret = 0, oobsize;
2031 int written = 0, oobcmd;
2033 size_t len = ops->ooblen;
2034 const u_char *buf = ops->oobbuf;
2035 mtd_oob_mode_t mode = ops->mode;
2039 DEBUG(MTD_DEBUG_LEVEL3, "%s: to = 0x%08x, len = %i\n",
2040 __func__, (unsigned int) to, (int) len);
2042 /* Initialize retlen, in case of early exit */
2045 if (mode == MTD_OOB_AUTO)
2046 oobsize = this->ecclayout->oobavail;
2048 oobsize = mtd->oobsize;
2050 column = to & (mtd->oobsize - 1);
2052 if (unlikely(column >= oobsize)) {
2053 printk(KERN_ERR "%s: Attempted to start write outside oob\n",
2058 /* For compatibility with NAND: Do not allow write past end of page */
2059 if (unlikely(column + len > oobsize)) {
2060 printk(KERN_ERR "%s: Attempt to write past end of page\n",
2065 /* Do not allow reads past end of device */
2066 if (unlikely(to >= mtd->size ||
2067 column + len > ((mtd->size >> this->page_shift) -
2068 (to >> this->page_shift)) * oobsize)) {
2069 printk(KERN_ERR "%s: Attempted to write past end of device\n",
2074 oobbuf = this->oob_buf;
2076 oobcmd = ONENAND_IS_MLC(this) ? ONENAND_CMD_PROG : ONENAND_CMD_PROGOOB;
2078 /* Loop until all data write */
2079 while (written < len) {
2080 int thislen = min_t(int, oobsize, len - written);
2084 this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->oobsize);
2086 /* We send data to spare ram with oobsize
2087 * to prevent byte access */
2088 memset(oobbuf, 0xff, mtd->oobsize);
2089 if (mode == MTD_OOB_AUTO)
2090 onenand_fill_auto_oob(mtd, oobbuf, buf, column, thislen);
2092 memcpy(oobbuf + column, buf, thislen);
2093 this->write_bufferram(mtd, ONENAND_SPARERAM, oobbuf, 0, mtd->oobsize);
2095 if (ONENAND_IS_MLC(this) || ONENAND_IS_4KB_PAGE(this)) {
2096 /* Set main area of DataRAM to 0xff*/
2097 memset(this->page_buf, 0xff, mtd->writesize);
2098 this->write_bufferram(mtd, ONENAND_DATARAM,
2099 this->page_buf, 0, mtd->writesize);
2102 this->command(mtd, oobcmd, to, mtd->oobsize);
2104 onenand_update_bufferram(mtd, to, 0);
2105 if (ONENAND_IS_2PLANE(this)) {
2106 ONENAND_SET_BUFFERRAM1(this);
2107 onenand_update_bufferram(mtd, to + this->writesize, 0);
2110 ret = this->wait(mtd, FL_WRITING);
2112 printk(KERN_ERR "%s: write failed %d\n", __func__, ret);
2116 ret = onenand_verify_oob(mtd, oobbuf, to);
2118 printk(KERN_ERR "%s: verify failed %d\n",
2127 to += mtd->writesize;
2132 ops->oobretlen = written;
2138 * onenand_write - [MTD Interface] write buffer to FLASH
2139 * @param mtd MTD device structure
2140 * @param to offset to write to
2141 * @param len number of bytes to write
2142 * @param retlen pointer to variable to store the number of written bytes
2143 * @param buf the data to write
2147 static int onenand_write(struct mtd_info *mtd, loff_t to, size_t len,
2148 size_t *retlen, const u_char *buf)
2150 struct mtd_oob_ops ops = {
2153 .datbuf = (u_char *) buf,
2158 onenand_get_device(mtd, FL_WRITING);
2159 ret = onenand_write_ops_nolock(mtd, to, &ops);
2160 onenand_release_device(mtd);
2162 *retlen = ops.retlen;
2167 * onenand_write_oob - [MTD Interface] NAND write data and/or out-of-band
2168 * @param mtd: MTD device structure
2169 * @param to: offset to write
2170 * @param ops: oob operation description structure
2172 static int onenand_write_oob(struct mtd_info *mtd, loff_t to,
2173 struct mtd_oob_ops *ops)
2177 switch (ops->mode) {
2182 /* Not implemented yet */
2187 onenand_get_device(mtd, FL_WRITING);
2189 ret = onenand_write_ops_nolock(mtd, to, ops);
2191 ret = onenand_write_oob_nolock(mtd, to, ops);
2192 onenand_release_device(mtd);
2198 * onenand_block_isbad_nolock - [GENERIC] Check if a block is marked bad
2199 * @param mtd MTD device structure
2200 * @param ofs offset from device start
2201 * @param allowbbt 1, if its allowed to access the bbt area
2203 * Check, if the block is bad. Either by reading the bad block table or
2204 * calling of the scan function.
2206 static int onenand_block_isbad_nolock(struct mtd_info *mtd, loff_t ofs, int allowbbt)
2208 struct onenand_chip *this = mtd->priv;
2209 struct bbm_info *bbm = this->bbm;
2211 /* Return info from the table */
2212 return bbm->isbad_bbt(mtd, ofs, allowbbt);
2216 static int onenand_multiblock_erase_verify(struct mtd_info *mtd,
2217 struct erase_info *instr)
2219 struct onenand_chip *this = mtd->priv;
2220 loff_t addr = instr->addr;
2221 int len = instr->len;
2222 unsigned int block_size = (1 << this->erase_shift);
2226 this->command(mtd, ONENAND_CMD_ERASE_VERIFY, addr, block_size);
2227 ret = this->wait(mtd, FL_VERIFYING_ERASE);
2229 printk(KERN_ERR "%s: Failed verify, block %d\n",
2230 __func__, onenand_block(this, addr));
2231 instr->state = MTD_ERASE_FAILED;
2232 instr->fail_addr = addr;
2242 * onenand_multiblock_erase - [Internal] erase block(s) using multiblock erase
2243 * @param mtd MTD device structure
2244 * @param instr erase instruction
2245 * @param region erase region
2247 * Erase one or more blocks up to 64 block at a time
2249 static int onenand_multiblock_erase(struct mtd_info *mtd,
2250 struct erase_info *instr,
2251 unsigned int block_size)
2253 struct onenand_chip *this = mtd->priv;
2254 loff_t addr = instr->addr;
2255 int len = instr->len;
2260 instr->state = MTD_ERASING;
2262 if (ONENAND_IS_DDP(this)) {
2263 loff_t bdry_addr = this->chipsize >> 1;
2264 if (addr < bdry_addr && (addr + len) > bdry_addr)
2265 bdry_block = bdry_addr >> this->erase_shift;
2270 /* Check if we have a bad block, we do not erase bad blocks */
2271 if (onenand_block_isbad_nolock(mtd, addr, 0)) {
2272 printk(KERN_WARNING "%s: attempt to erase a bad block "
2273 "at addr 0x%012llx\n",
2274 __func__, (unsigned long long) addr);
2275 instr->state = MTD_ERASE_FAILED;
2285 /* loop over 64 eb batches */
2287 struct erase_info verify_instr = *instr;
2288 int max_eb_count = MB_ERASE_MAX_BLK_COUNT;
2290 verify_instr.addr = addr;
2291 verify_instr.len = 0;
2293 /* do not cross chip boundary */
2295 int this_block = (addr >> this->erase_shift);
2297 if (this_block < bdry_block) {
2298 max_eb_count = min(max_eb_count,
2299 (bdry_block - this_block));
2305 while (len > block_size && eb_count < (max_eb_count - 1)) {
2306 this->command(mtd, ONENAND_CMD_MULTIBLOCK_ERASE,
2308 onenand_invalidate_bufferram(mtd, addr, block_size);
2310 ret = this->wait(mtd, FL_PREPARING_ERASE);
2312 printk(KERN_ERR "%s: Failed multiblock erase, "
2313 "block %d\n", __func__,
2314 onenand_block(this, addr));
2315 instr->state = MTD_ERASE_FAILED;
2316 instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
2325 /* last block of 64-eb series */
2327 this->command(mtd, ONENAND_CMD_ERASE, addr, block_size);
2328 onenand_invalidate_bufferram(mtd, addr, block_size);
2330 ret = this->wait(mtd, FL_ERASING);
2331 /* Check if it is write protected */
2333 printk(KERN_ERR "%s: Failed erase, block %d\n",
2334 __func__, onenand_block(this, addr));
2335 instr->state = MTD_ERASE_FAILED;
2336 instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
2345 verify_instr.len = eb_count * block_size;
2346 if (onenand_multiblock_erase_verify(mtd, &verify_instr)) {
2347 instr->state = verify_instr.state;
2348 instr->fail_addr = verify_instr.fail_addr;
2358 * onenand_block_by_block_erase - [Internal] erase block(s) using regular erase
2359 * @param mtd MTD device structure
2360 * @param instr erase instruction
2361 * @param region erase region
2362 * @param block_size erase block size
2364 * Erase one or more blocks one block at a time
2366 static int onenand_block_by_block_erase(struct mtd_info *mtd,
2367 struct erase_info *instr,
2368 struct mtd_erase_region_info *region,
2369 unsigned int block_size)
2371 struct onenand_chip *this = mtd->priv;
2372 loff_t addr = instr->addr;
2373 int len = instr->len;
2374 loff_t region_end = 0;
2378 /* region is set for Flex-OneNAND */
2379 region_end = region->offset + region->erasesize * region->numblocks;
2382 instr->state = MTD_ERASING;
2384 /* Loop through the blocks */
2388 /* Check if we have a bad block, we do not erase bad blocks */
2389 if (onenand_block_isbad_nolock(mtd, addr, 0)) {
2390 printk(KERN_WARNING "%s: attempt to erase a bad block "
2391 "at addr 0x%012llx\n",
2392 __func__, (unsigned long long) addr);
2393 instr->state = MTD_ERASE_FAILED;
2397 this->command(mtd, ONENAND_CMD_ERASE, addr, block_size);
2399 onenand_invalidate_bufferram(mtd, addr, block_size);
2401 ret = this->wait(mtd, FL_ERASING);
2402 /* Check, if it is write protected */
2404 printk(KERN_ERR "%s: Failed erase, block %d\n",
2405 __func__, onenand_block(this, addr));
2406 instr->state = MTD_ERASE_FAILED;
2407 instr->fail_addr = addr;
2414 if (addr == region_end) {
2419 block_size = region->erasesize;
2420 region_end = region->offset + region->erasesize * region->numblocks;
2422 if (len & (block_size - 1)) {
2423 /* FIXME: This should be handled at MTD partitioning level. */
2424 printk(KERN_ERR "%s: Unaligned address\n",
2434 * onenand_erase - [MTD Interface] erase block(s)
2435 * @param mtd MTD device structure
2436 * @param instr erase instruction
2438 * Erase one or more blocks
2440 static int onenand_erase(struct mtd_info *mtd, struct erase_info *instr)
2442 struct onenand_chip *this = mtd->priv;
2443 unsigned int block_size;
2444 loff_t addr = instr->addr;
2445 loff_t len = instr->len;
2447 struct mtd_erase_region_info *region = NULL;
2448 loff_t region_offset = 0;
2450 DEBUG(MTD_DEBUG_LEVEL3, "%s: start=0x%012llx, len=%llu\n", __func__,
2451 (unsigned long long) instr->addr, (unsigned long long) instr->len);
2453 /* Do not allow erase past end of device */
2454 if (unlikely((len + addr) > mtd->size)) {
2455 printk(KERN_ERR "%s: Erase past end of device\n", __func__);
2459 if (FLEXONENAND(this)) {
2460 /* Find the eraseregion of this address */
2461 int i = flexonenand_region(mtd, addr);
2463 region = &mtd->eraseregions[i];
2464 block_size = region->erasesize;
2466 /* Start address within region must align on block boundary.
2467 * Erase region's start offset is always block start address.
2469 region_offset = region->offset;
2471 block_size = 1 << this->erase_shift;
2473 /* Start address must align on block boundary */
2474 if (unlikely((addr - region_offset) & (block_size - 1))) {
2475 printk(KERN_ERR "%s: Unaligned address\n", __func__);
2479 /* Length must align on block boundary */
2480 if (unlikely(len & (block_size - 1))) {
2481 printk(KERN_ERR "%s: Length not block aligned\n", __func__);
2485 instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
2487 /* Grab the lock and see if the device is available */
2488 onenand_get_device(mtd, FL_ERASING);
2490 if (region || instr->len < MB_ERASE_MIN_BLK_COUNT * block_size) {
2491 /* region is set for Flex-OneNAND (no mb erase) */
2492 ret = onenand_block_by_block_erase(mtd, instr,
2493 region, block_size);
2495 ret = onenand_multiblock_erase(mtd, instr, block_size);
2498 /* Deselect and wake up anyone waiting on the device */
2499 onenand_release_device(mtd);
2501 /* Do call back function */
2503 instr->state = MTD_ERASE_DONE;
2504 mtd_erase_callback(instr);
2511 * onenand_sync - [MTD Interface] sync
2512 * @param mtd MTD device structure
2514 * Sync is actually a wait for chip ready function
2516 static void onenand_sync(struct mtd_info *mtd)
2518 DEBUG(MTD_DEBUG_LEVEL3, "%s: called\n", __func__);
2520 /* Grab the lock and see if the device is available */
2521 onenand_get_device(mtd, FL_SYNCING);
2523 /* Release it and go back */
2524 onenand_release_device(mtd);
2528 * onenand_block_isbad - [MTD Interface] Check whether the block at the given offset is bad
2529 * @param mtd MTD device structure
2530 * @param ofs offset relative to mtd start
2532 * Check whether the block is bad
2534 static int onenand_block_isbad(struct mtd_info *mtd, loff_t ofs)
2538 /* Check for invalid offset */
2539 if (ofs > mtd->size)
2542 onenand_get_device(mtd, FL_READING);
2543 ret = onenand_block_isbad_nolock(mtd, ofs, 0);
2544 onenand_release_device(mtd);
2549 * onenand_default_block_markbad - [DEFAULT] mark a block bad
2550 * @param mtd MTD device structure
2551 * @param ofs offset from device start
2553 * This is the default implementation, which can be overridden by
2554 * a hardware specific driver.
2556 static int onenand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
2558 struct onenand_chip *this = mtd->priv;
2559 struct bbm_info *bbm = this->bbm;
2560 u_char buf[2] = {0, 0};
2561 struct mtd_oob_ops ops = {
2562 .mode = MTD_OOB_PLACE,
2569 /* Get block number */
2570 block = onenand_block(this, ofs);
2572 bbm->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1);
2574 /* We write two bytes, so we don't have to mess with 16-bit access */
2575 ofs += mtd->oobsize + (bbm->badblockpos & ~0x01);
2576 /* FIXME : What to do when marking SLC block in partition
2577 * with MLC erasesize? For now, it is not advisable to
2578 * create partitions containing both SLC and MLC regions.
2580 return onenand_write_oob_nolock(mtd, ofs, &ops);
2584 * onenand_block_markbad - [MTD Interface] Mark the block at the given offset as bad
2585 * @param mtd MTD device structure
2586 * @param ofs offset relative to mtd start
2588 * Mark the block as bad
2590 static int onenand_block_markbad(struct mtd_info *mtd, loff_t ofs)
2592 struct onenand_chip *this = mtd->priv;
2595 ret = onenand_block_isbad(mtd, ofs);
2597 /* If it was bad already, return success and do nothing */
2603 onenand_get_device(mtd, FL_WRITING);
2604 ret = this->block_markbad(mtd, ofs);
2605 onenand_release_device(mtd);
2610 * onenand_do_lock_cmd - [OneNAND Interface] Lock or unlock block(s)
2611 * @param mtd MTD device structure
2612 * @param ofs offset relative to mtd start
2613 * @param len number of bytes to lock or unlock
2614 * @param cmd lock or unlock command
2616 * Lock or unlock one or more blocks
2618 static int onenand_do_lock_cmd(struct mtd_info *mtd, loff_t ofs, size_t len, int cmd)
2620 struct onenand_chip *this = mtd->priv;
2621 int start, end, block, value, status;
2624 start = onenand_block(this, ofs);
2625 end = onenand_block(this, ofs + len) - 1;
2627 if (cmd == ONENAND_CMD_LOCK)
2628 wp_status_mask = ONENAND_WP_LS;
2630 wp_status_mask = ONENAND_WP_US;
2632 /* Continuous lock scheme */
2633 if (this->options & ONENAND_HAS_CONT_LOCK) {
2634 /* Set start block address */
2635 this->write_word(start, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
2636 /* Set end block address */
2637 this->write_word(end, this->base + ONENAND_REG_END_BLOCK_ADDRESS);
2638 /* Write lock command */
2639 this->command(mtd, cmd, 0, 0);
2641 /* There's no return value */
2642 this->wait(mtd, FL_LOCKING);
2645 while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
2646 & ONENAND_CTRL_ONGO)
2649 /* Check lock status */
2650 status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
2651 if (!(status & wp_status_mask))
2652 printk(KERN_ERR "%s: wp status = 0x%x\n",
2658 /* Block lock scheme */
2659 for (block = start; block < end + 1; block++) {
2660 /* Set block address */
2661 value = onenand_block_address(this, block);
2662 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
2663 /* Select DataRAM for DDP */
2664 value = onenand_bufferram_address(this, block);
2665 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
2666 /* Set start block address */
2667 this->write_word(block, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
2668 /* Write lock command */
2669 this->command(mtd, cmd, 0, 0);
2671 /* There's no return value */
2672 this->wait(mtd, FL_LOCKING);
2675 while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
2676 & ONENAND_CTRL_ONGO)
2679 /* Check lock status */
2680 status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
2681 if (!(status & wp_status_mask))
2682 printk(KERN_ERR "%s: block = %d, wp status = 0x%x\n",
2683 __func__, block, status);
2690 * onenand_lock - [MTD Interface] Lock block(s)
2691 * @param mtd MTD device structure
2692 * @param ofs offset relative to mtd start
2693 * @param len number of bytes to unlock
2695 * Lock one or more blocks
2697 static int onenand_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
2701 onenand_get_device(mtd, FL_LOCKING);
2702 ret = onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_LOCK);
2703 onenand_release_device(mtd);
2708 * onenand_unlock - [MTD Interface] Unlock block(s)
2709 * @param mtd MTD device structure
2710 * @param ofs offset relative to mtd start
2711 * @param len number of bytes to unlock
2713 * Unlock one or more blocks
2715 static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
2719 onenand_get_device(mtd, FL_LOCKING);
2720 ret = onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK);
2721 onenand_release_device(mtd);
2726 * onenand_check_lock_status - [OneNAND Interface] Check lock status
2727 * @param this onenand chip data structure
2731 static int onenand_check_lock_status(struct onenand_chip *this)
2733 unsigned int value, block, status;
2736 end = this->chipsize >> this->erase_shift;
2737 for (block = 0; block < end; block++) {
2738 /* Set block address */
2739 value = onenand_block_address(this, block);
2740 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
2741 /* Select DataRAM for DDP */
2742 value = onenand_bufferram_address(this, block);
2743 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
2744 /* Set start block address */
2745 this->write_word(block, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
2747 /* Check lock status */
2748 status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
2749 if (!(status & ONENAND_WP_US)) {
2750 printk(KERN_ERR "%s: block = %d, wp status = 0x%x\n",
2751 __func__, block, status);
2760 * onenand_unlock_all - [OneNAND Interface] unlock all blocks
2761 * @param mtd MTD device structure
2765 static void onenand_unlock_all(struct mtd_info *mtd)
2767 struct onenand_chip *this = mtd->priv;
2769 loff_t len = mtd->size;
2771 if (this->options & ONENAND_HAS_UNLOCK_ALL) {
2772 /* Set start block address */
2773 this->write_word(0, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
2774 /* Write unlock command */
2775 this->command(mtd, ONENAND_CMD_UNLOCK_ALL, 0, 0);
2777 /* There's no return value */
2778 this->wait(mtd, FL_LOCKING);
2781 while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
2782 & ONENAND_CTRL_ONGO)
2785 /* Don't check lock status */
2786 if (this->options & ONENAND_SKIP_UNLOCK_CHECK)
2789 /* Check lock status */
2790 if (onenand_check_lock_status(this))
2793 /* Workaround for all block unlock in DDP */
2794 if (ONENAND_IS_DDP(this) && !FLEXONENAND(this)) {
2795 /* All blocks on another chip */
2796 ofs = this->chipsize >> 1;
2797 len = this->chipsize >> 1;
2801 onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK);
2804 #ifdef CONFIG_MTD_ONENAND_OTP
2807 * onenand_otp_command - Send OTP specific command to OneNAND device
2808 * @param mtd MTD device structure
2809 * @param cmd the command to be sent
2810 * @param addr offset to read from or write to
2811 * @param len number of bytes to read or write
2813 static int onenand_otp_command(struct mtd_info *mtd, int cmd, loff_t addr,
2816 struct onenand_chip *this = mtd->priv;
2817 int value, block, page;
2819 /* Address translation */
2821 case ONENAND_CMD_OTP_ACCESS:
2822 block = (int) (addr >> this->erase_shift);
2827 block = (int) (addr >> this->erase_shift);
2828 page = (int) (addr >> this->page_shift);
2830 if (ONENAND_IS_2PLANE(this)) {
2831 /* Make the even block number */
2833 /* Is it the odd plane? */
2834 if (addr & this->writesize)
2838 page &= this->page_mask;
2843 /* Write 'DFS, FBA' of Flash */
2844 value = onenand_block_address(this, block);
2845 this->write_word(value, this->base +
2846 ONENAND_REG_START_ADDRESS1);
2850 /* Now we use page size operation */
2851 int sectors = 4, count = 4;
2856 if (ONENAND_IS_2PLANE(this) && cmd == ONENAND_CMD_PROG)
2857 cmd = ONENAND_CMD_2X_PROG;
2858 dataram = ONENAND_CURRENT_BUFFERRAM(this);
2862 /* Write 'FPA, FSA' of Flash */
2863 value = onenand_page_address(page, sectors);
2864 this->write_word(value, this->base +
2865 ONENAND_REG_START_ADDRESS8);
2867 /* Write 'BSA, BSC' of DataRAM */
2868 value = onenand_buffer_address(dataram, sectors, count);
2869 this->write_word(value, this->base + ONENAND_REG_START_BUFFER);
2872 /* Interrupt clear */
2873 this->write_word(ONENAND_INT_CLEAR, this->base + ONENAND_REG_INTERRUPT);
2876 this->write_word(cmd, this->base + ONENAND_REG_COMMAND);
2882 * onenand_otp_write_oob_nolock - [Internal] OneNAND write out-of-band, specific to OTP
2883 * @param mtd MTD device structure
2884 * @param to offset to write to
2885 * @param len number of bytes to write
2886 * @param retlen pointer to variable to store the number of written bytes
2887 * @param buf the data to write
2889 * OneNAND write out-of-band only for OTP
2891 static int onenand_otp_write_oob_nolock(struct mtd_info *mtd, loff_t to,
2892 struct mtd_oob_ops *ops)
2894 struct onenand_chip *this = mtd->priv;
2895 int column, ret = 0, oobsize;
2898 size_t len = ops->ooblen;
2899 const u_char *buf = ops->oobbuf;
2900 int block, value, status;
2904 /* Initialize retlen, in case of early exit */
2907 oobsize = mtd->oobsize;
2909 column = to & (mtd->oobsize - 1);
2911 oobbuf = this->oob_buf;
2913 /* Loop until all data write */
2914 while (written < len) {
2915 int thislen = min_t(int, oobsize, len - written);
2919 block = (int) (to >> this->erase_shift);
2921 * Write 'DFS, FBA' of Flash
2922 * Add: F100h DQ=DFS, FBA
2925 value = onenand_block_address(this, block);
2926 this->write_word(value, this->base +
2927 ONENAND_REG_START_ADDRESS1);
2930 * Select DataRAM for DDP
2934 value = onenand_bufferram_address(this, block);
2935 this->write_word(value, this->base +
2936 ONENAND_REG_START_ADDRESS2);
2937 ONENAND_SET_NEXT_BUFFERRAM(this);
2940 * Enter OTP access mode
2942 this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0);
2943 this->wait(mtd, FL_OTPING);
2945 /* We send data to spare ram with oobsize
2946 * to prevent byte access */
2947 memcpy(oobbuf + column, buf, thislen);
2950 * Write Data into DataRAM
2952 * in sector0/spare/page0
2955 this->write_bufferram(mtd, ONENAND_SPARERAM,
2956 oobbuf, 0, mtd->oobsize);
2958 onenand_otp_command(mtd, ONENAND_CMD_PROGOOB, to, mtd->oobsize);
2959 onenand_update_bufferram(mtd, to, 0);
2960 if (ONENAND_IS_2PLANE(this)) {
2961 ONENAND_SET_BUFFERRAM1(this);
2962 onenand_update_bufferram(mtd, to + this->writesize, 0);
2965 ret = this->wait(mtd, FL_WRITING);
2967 printk(KERN_ERR "%s: write failed %d\n", __func__, ret);
2971 /* Exit OTP access mode */
2972 this->command(mtd, ONENAND_CMD_RESET, 0, 0);
2973 this->wait(mtd, FL_RESETING);
2975 status = this->read_word(this->base + ONENAND_REG_CTRL_STATUS);
2978 if (status == 0x60) {
2979 printk(KERN_DEBUG "\nBLOCK\tSTATUS\n");
2980 printk(KERN_DEBUG "1st Block\tLOCKED\n");
2981 printk(KERN_DEBUG "OTP Block\tLOCKED\n");
2982 } else if (status == 0x20) {
2983 printk(KERN_DEBUG "\nBLOCK\tSTATUS\n");
2984 printk(KERN_DEBUG "1st Block\tLOCKED\n");
2985 printk(KERN_DEBUG "OTP Block\tUN-LOCKED\n");
2986 } else if (status == 0x40) {
2987 printk(KERN_DEBUG "\nBLOCK\tSTATUS\n");
2988 printk(KERN_DEBUG "1st Block\tUN-LOCKED\n");
2989 printk(KERN_DEBUG "OTP Block\tLOCKED\n");
2991 printk(KERN_DEBUG "Reboot to check\n");
2998 to += mtd->writesize;
3003 ops->oobretlen = written;
3008 /* Internal OTP operation */
3009 typedef int (*otp_op_t)(struct mtd_info *mtd, loff_t form, size_t len,
3010 size_t *retlen, u_char *buf);
3013 * do_otp_read - [DEFAULT] Read OTP block area
3014 * @param mtd MTD device structure
3015 * @param from The offset to read
3016 * @param len number of bytes to read
3017 * @param retlen pointer to variable to store the number of readbytes
3018 * @param buf the databuffer to put/get data
3020 * Read OTP block area.
3022 static int do_otp_read(struct mtd_info *mtd, loff_t from, size_t len,
3023 size_t *retlen, u_char *buf)
3025 struct onenand_chip *this = mtd->priv;
3026 struct mtd_oob_ops ops = {
3034 /* Enter OTP access mode */
3035 this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0);
3036 this->wait(mtd, FL_OTPING);
3038 ret = ONENAND_IS_MLC(this) || ONENAND_IS_4KB_PAGE(this) ?
3039 onenand_mlc_read_ops_nolock(mtd, from, &ops) :
3040 onenand_read_ops_nolock(mtd, from, &ops);
3042 /* Exit OTP access mode */
3043 this->command(mtd, ONENAND_CMD_RESET, 0, 0);
3044 this->wait(mtd, FL_RESETING);
3050 * do_otp_write - [DEFAULT] Write OTP block area
3051 * @param mtd MTD device structure
3052 * @param to The offset to write
3053 * @param len number of bytes to write
3054 * @param retlen pointer to variable to store the number of write bytes
3055 * @param buf the databuffer to put/get data
3057 * Write OTP block area.
3059 static int do_otp_write(struct mtd_info *mtd, loff_t to, size_t len,
3060 size_t *retlen, u_char *buf)
3062 struct onenand_chip *this = mtd->priv;
3063 unsigned char *pbuf = buf;
3065 struct mtd_oob_ops ops;
3067 /* Force buffer page aligned */
3068 if (len < mtd->writesize) {
3069 memcpy(this->page_buf, buf, len);
3070 memset(this->page_buf + len, 0xff, mtd->writesize - len);
3071 pbuf = this->page_buf;
3072 len = mtd->writesize;
3075 /* Enter OTP access mode */
3076 this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0);
3077 this->wait(mtd, FL_OTPING);
3083 ret = onenand_write_ops_nolock(mtd, to, &ops);
3084 *retlen = ops.retlen;
3086 /* Exit OTP access mode */
3087 this->command(mtd, ONENAND_CMD_RESET, 0, 0);
3088 this->wait(mtd, FL_RESETING);
3094 * do_otp_lock - [DEFAULT] Lock OTP block area
3095 * @param mtd MTD device structure
3096 * @param from The offset to lock
3097 * @param len number of bytes to lock
3098 * @param retlen pointer to variable to store the number of lock bytes
3099 * @param buf the databuffer to put/get data
3101 * Lock OTP block area.
3103 static int do_otp_lock(struct mtd_info *mtd, loff_t from, size_t len,
3104 size_t *retlen, u_char *buf)
3106 struct onenand_chip *this = mtd->priv;
3107 struct mtd_oob_ops ops;
3110 if (FLEXONENAND(this)) {
3112 /* Enter OTP access mode */
3113 this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0);
3114 this->wait(mtd, FL_OTPING);
3116 * For Flex-OneNAND, we write lock mark to 1st word of sector 4 of
3117 * main area of page 49.
3119 ops.len = mtd->writesize;
3123 ret = onenand_write_ops_nolock(mtd, mtd->writesize * 49, &ops);
3124 *retlen = ops.retlen;
3126 /* Exit OTP access mode */
3127 this->command(mtd, ONENAND_CMD_RESET, 0, 0);
3128 this->wait(mtd, FL_RESETING);
3130 ops.mode = MTD_OOB_PLACE;
3134 ret = onenand_otp_write_oob_nolock(mtd, from, &ops);
3135 *retlen = ops.oobretlen;
3142 * onenand_otp_walk - [DEFAULT] Handle OTP operation
3143 * @param mtd MTD device structure
3144 * @param from The offset to read/write
3145 * @param len number of bytes to read/write
3146 * @param retlen pointer to variable to store the number of read bytes
3147 * @param buf the databuffer to put/get data
3148 * @param action do given action
3149 * @param mode specify user and factory
3151 * Handle OTP operation.
3153 static int onenand_otp_walk(struct mtd_info *mtd, loff_t from, size_t len,
3154 size_t *retlen, u_char *buf,
3155 otp_op_t action, int mode)
3157 struct onenand_chip *this = mtd->priv;
3164 density = onenand_get_density(this->device_id);
3165 if (density < ONENAND_DEVICE_DENSITY_512Mb)
3170 if (mode == MTD_OTP_FACTORY) {
3171 from += mtd->writesize * otp_pages;
3172 otp_pages = ONENAND_PAGES_PER_BLOCK - otp_pages;
3175 /* Check User/Factory boundary */
3176 if (mode == MTD_OTP_USER) {
3177 if (mtd->writesize * otp_pages < from + len)
3180 if (mtd->writesize * otp_pages < len)
3184 onenand_get_device(mtd, FL_OTPING);
3185 while (len > 0 && otp_pages > 0) {
3186 if (!action) { /* OTP Info functions */
3187 struct otp_info *otpinfo;
3189 len -= sizeof(struct otp_info);
3195 otpinfo = (struct otp_info *) buf;
3196 otpinfo->start = from;
3197 otpinfo->length = mtd->writesize;
3198 otpinfo->locked = 0;
3200 from += mtd->writesize;
3201 buf += sizeof(struct otp_info);
3202 *retlen += sizeof(struct otp_info);
3206 ret = action(mtd, from, len, &tmp_retlen, buf);
3210 *retlen += tmp_retlen;
3217 onenand_release_device(mtd);
3223 * onenand_get_fact_prot_info - [MTD Interface] Read factory OTP info
3224 * @param mtd MTD device structure
3225 * @param buf the databuffer to put/get data
3226 * @param len number of bytes to read
3228 * Read factory OTP info.
3230 static int onenand_get_fact_prot_info(struct mtd_info *mtd,
3231 struct otp_info *buf, size_t len)
3236 ret = onenand_otp_walk(mtd, 0, len, &retlen, (u_char *) buf, NULL, MTD_OTP_FACTORY);
3238 return ret ? : retlen;
3242 * onenand_read_fact_prot_reg - [MTD Interface] Read factory OTP area
3243 * @param mtd MTD device structure
3244 * @param from The offset to read
3245 * @param len number of bytes to read
3246 * @param retlen pointer to variable to store the number of read bytes
3247 * @param buf the databuffer to put/get data
3249 * Read factory OTP area.
3251 static int onenand_read_fact_prot_reg(struct mtd_info *mtd, loff_t from,
3252 size_t len, size_t *retlen, u_char *buf)
3254 return onenand_otp_walk(mtd, from, len, retlen, buf, do_otp_read, MTD_OTP_FACTORY);
3258 * onenand_get_user_prot_info - [MTD Interface] Read user OTP info
3259 * @param mtd MTD device structure
3260 * @param buf the databuffer to put/get data
3261 * @param len number of bytes to read
3263 * Read user OTP info.
3265 static int onenand_get_user_prot_info(struct mtd_info *mtd,
3266 struct otp_info *buf, size_t len)
3271 ret = onenand_otp_walk(mtd, 0, len, &retlen, (u_char *) buf, NULL, MTD_OTP_USER);
3273 return ret ? : retlen;
3277 * onenand_read_user_prot_reg - [MTD Interface] Read user OTP area
3278 * @param mtd MTD device structure
3279 * @param from The offset to read
3280 * @param len number of bytes to read
3281 * @param retlen pointer to variable to store the number of read bytes
3282 * @param buf the databuffer to put/get data
3284 * Read user OTP area.
3286 static int onenand_read_user_prot_reg(struct mtd_info *mtd, loff_t from,
3287 size_t len, size_t *retlen, u_char *buf)
3289 return onenand_otp_walk(mtd, from, len, retlen, buf, do_otp_read, MTD_OTP_USER);
3293 * onenand_write_user_prot_reg - [MTD Interface] Write user OTP area
3294 * @param mtd MTD device structure
3295 * @param from The offset to write
3296 * @param len number of bytes to write
3297 * @param retlen pointer to variable to store the number of write bytes
3298 * @param buf the databuffer to put/get data
3300 * Write user OTP area.
3302 static int onenand_write_user_prot_reg(struct mtd_info *mtd, loff_t from,
3303 size_t len, size_t *retlen, u_char *buf)
3305 return onenand_otp_walk(mtd, from, len, retlen, buf, do_otp_write, MTD_OTP_USER);
3309 * onenand_lock_user_prot_reg - [MTD Interface] Lock user OTP area
3310 * @param mtd MTD device structure
3311 * @param from The offset to lock
3312 * @param len number of bytes to unlock
3314 * Write lock mark on spare area in page 0 in OTP block
3316 static int onenand_lock_user_prot_reg(struct mtd_info *mtd, loff_t from,
3319 struct onenand_chip *this = mtd->priv;
3320 u_char *buf = FLEXONENAND(this) ? this->page_buf : this->oob_buf;
3323 unsigned int otp_lock_offset = ONENAND_OTP_LOCK_OFFSET;
3325 memset(buf, 0xff, FLEXONENAND(this) ? this->writesize
3328 * Write lock mark to 8th word of sector0 of page0 of the spare0.
3329 * We write 16 bytes spare area instead of 2 bytes.
3330 * For Flex-OneNAND, we write lock mark to 1st word of sector 4 of
3331 * main area of page 49.
3335 len = FLEXONENAND(this) ? mtd->writesize : 16;
3338 * Note: OTP lock operation
3339 * OTP block : 0xXXFC XX 1111 1100
3340 * 1st block : 0xXXF3 (If chip support) XX 1111 0011
3341 * Both : 0xXXF0 (If chip support) XX 1111 0000
3343 if (FLEXONENAND(this))
3344 otp_lock_offset = FLEXONENAND_OTP_LOCK_OFFSET;
3346 /* ONENAND_OTP_AREA | ONENAND_OTP_BLOCK0 | ONENAND_OTP_AREA_BLOCK0 */
3348 buf[otp_lock_offset] = 0xFC;
3350 buf[otp_lock_offset] = 0xF3;
3352 buf[otp_lock_offset] = 0xF0;
3354 printk(KERN_DEBUG "[OneNAND] Invalid option selected for OTP\n");
3356 ret = onenand_otp_walk(mtd, from, len, &retlen, buf, do_otp_lock, MTD_OTP_USER);
3358 return ret ? : retlen;
3361 #endif /* CONFIG_MTD_ONENAND_OTP */
3364 * onenand_check_features - Check and set OneNAND features
3365 * @param mtd MTD data structure
3367 * Check and set OneNAND features
3371 static void onenand_check_features(struct mtd_info *mtd)
3373 struct onenand_chip *this = mtd->priv;
3374 unsigned int density, process;
3376 /* Lock scheme depends on density and process */
3377 density = onenand_get_density(this->device_id);
3378 process = this->version_id >> ONENAND_VERSION_PROCESS_SHIFT;
3382 case ONENAND_DEVICE_DENSITY_4Gb:
3383 if (ONENAND_IS_DDP(this))
3384 this->options |= ONENAND_HAS_2PLANE;
3386 this->options |= ONENAND_HAS_4KB_PAGE;
3388 case ONENAND_DEVICE_DENSITY_2Gb:
3389 /* 2Gb DDP does not have 2 plane */
3390 if (!ONENAND_IS_DDP(this))
3391 this->options |= ONENAND_HAS_2PLANE;
3392 this->options |= ONENAND_HAS_UNLOCK_ALL;
3394 case ONENAND_DEVICE_DENSITY_1Gb:
3395 /* A-Die has all block unlock */
3397 this->options |= ONENAND_HAS_UNLOCK_ALL;
3401 /* Some OneNAND has continuous lock scheme */
3403 this->options |= ONENAND_HAS_CONT_LOCK;
3407 if (ONENAND_IS_MLC(this) || ONENAND_IS_4KB_PAGE(this))
3408 this->options &= ~ONENAND_HAS_2PLANE;
3410 if (FLEXONENAND(this)) {
3411 this->options &= ~ONENAND_HAS_CONT_LOCK;
3412 this->options |= ONENAND_HAS_UNLOCK_ALL;
3415 if (this->options & ONENAND_HAS_CONT_LOCK)
3416 printk(KERN_DEBUG "Lock scheme is Continuous Lock\n");
3417 if (this->options & ONENAND_HAS_UNLOCK_ALL)
3418 printk(KERN_DEBUG "Chip support all block unlock\n");
3419 if (this->options & ONENAND_HAS_2PLANE)
3420 printk(KERN_DEBUG "Chip has 2 plane\n");
3421 if (this->options & ONENAND_HAS_4KB_PAGE)
3422 printk(KERN_DEBUG "Chip has 4KiB pagesize\n");
3426 * onenand_print_device_info - Print device & version ID
3427 * @param device device ID
3428 * @param version version ID
3430 * Print device & version ID
3432 static void onenand_print_device_info(int device, int version)
3434 int vcc, demuxed, ddp, density, flexonenand;
3436 vcc = device & ONENAND_DEVICE_VCC_MASK;
3437 demuxed = device & ONENAND_DEVICE_IS_DEMUX;
3438 ddp = device & ONENAND_DEVICE_IS_DDP;
3439 density = onenand_get_density(device);
3440 flexonenand = device & DEVICE_IS_FLEXONENAND;
3441 printk(KERN_INFO "%s%sOneNAND%s %dMB %sV 16-bit (0x%02x)\n",
3442 demuxed ? "" : "Muxed ",
3443 flexonenand ? "Flex-" : "",
3446 vcc ? "2.65/3.3" : "1.8",
3448 printk(KERN_INFO "OneNAND version = 0x%04x\n", version);
3451 static const struct onenand_manufacturers onenand_manuf_ids[] = {
3452 {ONENAND_MFR_SAMSUNG, "Samsung"},
3453 {ONENAND_MFR_NUMONYX, "Numonyx"},
3457 * onenand_check_maf - Check manufacturer ID
3458 * @param manuf manufacturer ID
3460 * Check manufacturer ID
3462 static int onenand_check_maf(int manuf)
3464 int size = ARRAY_SIZE(onenand_manuf_ids);
3468 for (i = 0; i < size; i++)
3469 if (manuf == onenand_manuf_ids[i].id)
3473 name = onenand_manuf_ids[i].name;
3477 printk(KERN_DEBUG "OneNAND Manufacturer: %s (0x%0x)\n", name, manuf);
3483 * flexonenand_get_boundary - Reads the SLC boundary
3484 * @param onenand_info - onenand info structure
3486 static int flexonenand_get_boundary(struct mtd_info *mtd)
3488 struct onenand_chip *this = mtd->priv;
3490 int ret, syscfg, locked;
3493 syscfg = this->read_word(this->base + ONENAND_REG_SYS_CFG1);
3494 this->write_word((syscfg | 0x0100), this->base + ONENAND_REG_SYS_CFG1);
3496 for (die = 0; die < this->dies; die++) {
3497 this->command(mtd, FLEXONENAND_CMD_PI_ACCESS, die, 0);
3498 this->wait(mtd, FL_SYNCING);
3500 this->command(mtd, FLEXONENAND_CMD_READ_PI, die, 0);
3501 ret = this->wait(mtd, FL_READING);
3503 bdry = this->read_word(this->base + ONENAND_DATARAM);
3504 if ((bdry >> FLEXONENAND_PI_UNLOCK_SHIFT) == 3)
3508 this->boundary[die] = bdry & FLEXONENAND_PI_MASK;
3510 this->command(mtd, ONENAND_CMD_RESET, 0, 0);
3511 ret = this->wait(mtd, FL_RESETING);
3513 printk(KERN_INFO "Die %d boundary: %d%s\n", die,
3514 this->boundary[die], locked ? "(Locked)" : "(Unlocked)");
3518 this->write_word(syscfg, this->base + ONENAND_REG_SYS_CFG1);
3523 * flexonenand_get_size - Fill up fields in onenand_chip and mtd_info
3524 * boundary[], diesize[], mtd->size, mtd->erasesize
3525 * @param mtd - MTD device structure
3527 static void flexonenand_get_size(struct mtd_info *mtd)
3529 struct onenand_chip *this = mtd->priv;
3530 int die, i, eraseshift, density;
3531 int blksperdie, maxbdry;
3534 density = onenand_get_density(this->device_id);
3535 blksperdie = ((loff_t)(16 << density) << 20) >> (this->erase_shift);
3536 blksperdie >>= ONENAND_IS_DDP(this) ? 1 : 0;
3537 maxbdry = blksperdie - 1;
3538 eraseshift = this->erase_shift - 1;
3540 mtd->numeraseregions = this->dies << 1;
3542 /* This fills up the device boundary */
3543 flexonenand_get_boundary(mtd);
3546 for (; die < this->dies; die++) {
3547 if (!die || this->boundary[die-1] != maxbdry) {
3549 mtd->eraseregions[i].offset = ofs;
3550 mtd->eraseregions[i].erasesize = 1 << eraseshift;
3551 mtd->eraseregions[i].numblocks =
3552 this->boundary[die] + 1;
3553 ofs += mtd->eraseregions[i].numblocks << eraseshift;
3556 mtd->numeraseregions -= 1;
3557 mtd->eraseregions[i].numblocks +=
3558 this->boundary[die] + 1;
3559 ofs += (this->boundary[die] + 1) << (eraseshift - 1);
3561 if (this->boundary[die] != maxbdry) {
3563 mtd->eraseregions[i].offset = ofs;
3564 mtd->eraseregions[i].erasesize = 1 << eraseshift;
3565 mtd->eraseregions[i].numblocks = maxbdry ^
3566 this->boundary[die];
3567 ofs += mtd->eraseregions[i].numblocks << eraseshift;
3570 mtd->numeraseregions -= 1;
3573 /* Expose MLC erase size except when all blocks are SLC */
3574 mtd->erasesize = 1 << this->erase_shift;
3575 if (mtd->numeraseregions == 1)
3576 mtd->erasesize >>= 1;
3578 printk(KERN_INFO "Device has %d eraseregions\n", mtd->numeraseregions);
3579 for (i = 0; i < mtd->numeraseregions; i++)
3580 printk(KERN_INFO "[offset: 0x%08x, erasesize: 0x%05x,"
3581 " numblocks: %04u]\n",
3582 (unsigned int) mtd->eraseregions[i].offset,
3583 mtd->eraseregions[i].erasesize,
3584 mtd->eraseregions[i].numblocks);
3586 for (die = 0, mtd->size = 0; die < this->dies; die++) {
3587 this->diesize[die] = (loff_t)blksperdie << this->erase_shift;
3588 this->diesize[die] -= (loff_t)(this->boundary[die] + 1)
3589 << (this->erase_shift - 1);
3590 mtd->size += this->diesize[die];
3595 * flexonenand_check_blocks_erased - Check if blocks are erased
3596 * @param mtd_info - mtd info structure
3597 * @param start - first erase block to check
3598 * @param end - last erase block to check
3600 * Converting an unerased block from MLC to SLC
3601 * causes byte values to change. Since both data and its ECC
3602 * have changed, reads on the block give uncorrectable error.
3603 * This might lead to the block being detected as bad.
3605 * Avoid this by ensuring that the block to be converted is
3608 static int flexonenand_check_blocks_erased(struct mtd_info *mtd, int start, int end)
3610 struct onenand_chip *this = mtd->priv;
3613 struct mtd_oob_ops ops = {
3614 .mode = MTD_OOB_PLACE,
3616 .ooblen = mtd->oobsize,
3618 .oobbuf = this->oob_buf,
3622 printk(KERN_DEBUG "Check blocks from %d to %d\n", start, end);
3624 for (block = start; block <= end; block++) {
3625 addr = flexonenand_addr(this, block);
3626 if (onenand_block_isbad_nolock(mtd, addr, 0))
3630 * Since main area write results in ECC write to spare,
3631 * it is sufficient to check only ECC bytes for change.
3633 ret = onenand_read_oob_nolock(mtd, addr, &ops);
3637 for (i = 0; i < mtd->oobsize; i++)
3638 if (this->oob_buf[i] != 0xff)
3641 if (i != mtd->oobsize) {
3642 printk(KERN_WARNING "%s: Block %d not erased.\n",
3652 * flexonenand_set_boundary - Writes the SLC boundary
3653 * @param mtd - mtd info structure
3655 int flexonenand_set_boundary(struct mtd_info *mtd, int die,
3656 int boundary, int lock)
3658 struct onenand_chip *this = mtd->priv;
3659 int ret, density, blksperdie, old, new, thisboundary;
3662 /* Change only once for SDP Flex-OneNAND */
3663 if (die && (!ONENAND_IS_DDP(this)))
3666 /* boundary value of -1 indicates no required change */
3667 if (boundary < 0 || boundary == this->boundary[die])
3670 density = onenand_get_density(this->device_id);
3671 blksperdie = ((16 << density) << 20) >> this->erase_shift;
3672 blksperdie >>= ONENAND_IS_DDP(this) ? 1 : 0;
3674 if (boundary >= blksperdie) {
3675 printk(KERN_ERR "%s: Invalid boundary value. "
3676 "Boundary not changed.\n", __func__);
3680 /* Check if converting blocks are erased */
3681 old = this->boundary[die] + (die * this->density_mask);
3682 new = boundary + (die * this->density_mask);
3683 ret = flexonenand_check_blocks_erased(mtd, min(old, new) + 1, max(old, new));
3685 printk(KERN_ERR "%s: Please erase blocks "
3686 "before boundary change\n", __func__);
3690 this->command(mtd, FLEXONENAND_CMD_PI_ACCESS, die, 0);
3691 this->wait(mtd, FL_SYNCING);
3693 /* Check is boundary is locked */
3694 this->command(mtd, FLEXONENAND_CMD_READ_PI, die, 0);
3695 ret = this->wait(mtd, FL_READING);
3697 thisboundary = this->read_word(this->base + ONENAND_DATARAM);
3698 if ((thisboundary >> FLEXONENAND_PI_UNLOCK_SHIFT) != 3) {
3699 printk(KERN_ERR "%s: boundary locked\n", __func__);
3704 printk(KERN_INFO "Changing die %d boundary: %d%s\n",
3705 die, boundary, lock ? "(Locked)" : "(Unlocked)");
3707 addr = die ? this->diesize[0] : 0;
3709 boundary &= FLEXONENAND_PI_MASK;
3710 boundary |= lock ? 0 : (3 << FLEXONENAND_PI_UNLOCK_SHIFT);
3712 this->command(mtd, ONENAND_CMD_ERASE, addr, 0);
3713 ret = this->wait(mtd, FL_ERASING);
3715 printk(KERN_ERR "%s: Failed PI erase for Die %d\n",
3720 this->write_word(boundary, this->base + ONENAND_DATARAM);
3721 this->command(mtd, ONENAND_CMD_PROG, addr, 0);
3722 ret = this->wait(mtd, FL_WRITING);
3724 printk(KERN_ERR "%s: Failed PI write for Die %d\n",
3729 this->command(mtd, FLEXONENAND_CMD_PI_UPDATE, die, 0);
3730 ret = this->wait(mtd, FL_WRITING);
3732 this->write_word(ONENAND_CMD_RESET, this->base + ONENAND_REG_COMMAND);
3733 this->wait(mtd, FL_RESETING);
3735 /* Recalculate device size on boundary change*/
3736 flexonenand_get_size(mtd);
3742 * onenand_chip_probe - [OneNAND Interface] The generic chip probe
3743 * @param mtd MTD device structure
3745 * OneNAND detection method:
3746 * Compare the values from command with ones from register
3748 static int onenand_chip_probe(struct mtd_info *mtd)
3750 struct onenand_chip *this = mtd->priv;
3751 int bram_maf_id, bram_dev_id, maf_id, dev_id;
3754 /* Save system configuration 1 */
3755 syscfg = this->read_word(this->base + ONENAND_REG_SYS_CFG1);
3756 /* Clear Sync. Burst Read mode to read BootRAM */
3757 this->write_word((syscfg & ~ONENAND_SYS_CFG1_SYNC_READ & ~ONENAND_SYS_CFG1_SYNC_WRITE), this->base + ONENAND_REG_SYS_CFG1);
3759 /* Send the command for reading device ID from BootRAM */
3760 this->write_word(ONENAND_CMD_READID, this->base + ONENAND_BOOTRAM);
3762 /* Read manufacturer and device IDs from BootRAM */
3763 bram_maf_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x0);
3764 bram_dev_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x2);
3766 /* Reset OneNAND to read default register values */
3767 this->write_word(ONENAND_CMD_RESET, this->base + ONENAND_BOOTRAM);
3769 this->wait(mtd, FL_RESETING);
3771 /* Restore system configuration 1 */
3772 this->write_word(syscfg, this->base + ONENAND_REG_SYS_CFG1);
3774 /* Check manufacturer ID */
3775 if (onenand_check_maf(bram_maf_id))
3778 /* Read manufacturer and device IDs from Register */
3779 maf_id = this->read_word(this->base + ONENAND_REG_MANUFACTURER_ID);
3780 dev_id = this->read_word(this->base + ONENAND_REG_DEVICE_ID);
3782 /* Check OneNAND device */
3783 if (maf_id != bram_maf_id || dev_id != bram_dev_id)
3790 * onenand_probe - [OneNAND Interface] Probe the OneNAND device
3791 * @param mtd MTD device structure
3793 static int onenand_probe(struct mtd_info *mtd)
3795 struct onenand_chip *this = mtd->priv;
3796 int maf_id, dev_id, ver_id;
3800 ret = this->chip_probe(mtd);
3804 /* Read manufacturer and device IDs from Register */
3805 maf_id = this->read_word(this->base + ONENAND_REG_MANUFACTURER_ID);
3806 dev_id = this->read_word(this->base + ONENAND_REG_DEVICE_ID);
3807 ver_id = this->read_word(this->base + ONENAND_REG_VERSION_ID);
3808 this->technology = this->read_word(this->base + ONENAND_REG_TECHNOLOGY);
3810 /* Flash device information */
3811 onenand_print_device_info(dev_id, ver_id);
3812 this->device_id = dev_id;
3813 this->version_id = ver_id;
3815 /* Check OneNAND features */
3816 onenand_check_features(mtd);
3818 density = onenand_get_density(dev_id);
3819 if (FLEXONENAND(this)) {
3820 this->dies = ONENAND_IS_DDP(this) ? 2 : 1;
3821 /* Maximum possible erase regions */
3822 mtd->numeraseregions = this->dies << 1;
3823 mtd->eraseregions = kzalloc(sizeof(struct mtd_erase_region_info)
3824 * (this->dies << 1), GFP_KERNEL);
3825 if (!mtd->eraseregions)
3830 * For Flex-OneNAND, chipsize represents maximum possible device size.
3831 * mtd->size represents the actual device size.
3833 this->chipsize = (16 << density) << 20;
3835 /* OneNAND page size & block size */
3836 /* The data buffer size is equal to page size */
3837 mtd->writesize = this->read_word(this->base + ONENAND_REG_DATA_BUFFER_SIZE);
3838 /* We use the full BufferRAM */
3839 if (ONENAND_IS_MLC(this) || ONENAND_IS_4KB_PAGE(this))
3840 mtd->writesize <<= 1;
3842 mtd->oobsize = mtd->writesize >> 5;
3843 /* Pages per a block are always 64 in OneNAND */
3844 mtd->erasesize = mtd->writesize << 6;
3846 * Flex-OneNAND SLC area has 64 pages per block.
3847 * Flex-OneNAND MLC area has 128 pages per block.
3848 * Expose MLC erase size to find erase_shift and page_mask.
3850 if (FLEXONENAND(this))
3851 mtd->erasesize <<= 1;
3853 this->erase_shift = ffs(mtd->erasesize) - 1;
3854 this->page_shift = ffs(mtd->writesize) - 1;
3855 this->page_mask = (1 << (this->erase_shift - this->page_shift)) - 1;
3856 /* Set density mask. it is used for DDP */
3857 if (ONENAND_IS_DDP(this))
3858 this->density_mask = this->chipsize >> (this->erase_shift + 1);
3859 /* It's real page size */
3860 this->writesize = mtd->writesize;
3862 /* REVISIT: Multichip handling */
3864 if (FLEXONENAND(this))
3865 flexonenand_get_size(mtd);
3867 mtd->size = this->chipsize;
3870 * We emulate the 4KiB page and 256KiB erase block size
3871 * But oobsize is still 64 bytes.
3872 * It is only valid if you turn on 2X program support,
3873 * Otherwise it will be ignored by compiler.
3875 if (ONENAND_IS_2PLANE(this)) {
3876 mtd->writesize <<= 1;
3877 mtd->erasesize <<= 1;
3884 * onenand_suspend - [MTD Interface] Suspend the OneNAND flash
3885 * @param mtd MTD device structure
3887 static int onenand_suspend(struct mtd_info *mtd)
3889 return onenand_get_device(mtd, FL_PM_SUSPENDED);
3893 * onenand_resume - [MTD Interface] Resume the OneNAND flash
3894 * @param mtd MTD device structure
3896 static void onenand_resume(struct mtd_info *mtd)
3898 struct onenand_chip *this = mtd->priv;
3900 if (this->state == FL_PM_SUSPENDED)
3901 onenand_release_device(mtd);
3905 * onenand_scan - [OneNAND Interface] Scan for the OneNAND device
3906 * @param mtd MTD device structure
3907 * @param maxchips Number of chips to scan for
3909 * This fills out all the not initialized function pointers
3910 * with the defaults.
3911 * The flash ID is read and the mtd/chip structures are
3912 * filled with the appropriate values.
3914 int onenand_scan(struct mtd_info *mtd, int maxchips)
3917 struct onenand_chip *this = mtd->priv;
3919 if (!this->read_word)
3920 this->read_word = onenand_readw;
3921 if (!this->write_word)
3922 this->write_word = onenand_writew;
3925 this->command = onenand_command;
3927 onenand_setup_wait(mtd);
3928 if (!this->bbt_wait)
3929 this->bbt_wait = onenand_bbt_wait;
3930 if (!this->unlock_all)
3931 this->unlock_all = onenand_unlock_all;
3933 if (!this->chip_probe)
3934 this->chip_probe = onenand_chip_probe;
3936 if (!this->read_bufferram)
3937 this->read_bufferram = onenand_read_bufferram;
3938 if (!this->write_bufferram)
3939 this->write_bufferram = onenand_write_bufferram;
3941 if (!this->block_markbad)
3942 this->block_markbad = onenand_default_block_markbad;
3943 if (!this->scan_bbt)
3944 this->scan_bbt = onenand_default_bbt;
3946 if (onenand_probe(mtd))
3949 /* Set Sync. Burst Read after probing */
3950 if (this->mmcontrol) {
3951 printk(KERN_INFO "OneNAND Sync. Burst Read support\n");
3952 this->read_bufferram = onenand_sync_read_bufferram;
3955 /* Allocate buffers, if necessary */
3956 if (!this->page_buf) {
3957 this->page_buf = kzalloc(mtd->writesize, GFP_KERNEL);
3958 if (!this->page_buf) {
3959 printk(KERN_ERR "%s: Can't allocate page_buf\n",
3963 #ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE
3964 this->verify_buf = kzalloc(mtd->writesize, GFP_KERNEL);
3965 if (!this->verify_buf) {
3966 kfree(this->page_buf);
3970 this->options |= ONENAND_PAGEBUF_ALLOC;
3972 if (!this->oob_buf) {
3973 this->oob_buf = kzalloc(mtd->oobsize, GFP_KERNEL);
3974 if (!this->oob_buf) {
3975 printk(KERN_ERR "%s: Can't allocate oob_buf\n",
3977 if (this->options & ONENAND_PAGEBUF_ALLOC) {
3978 this->options &= ~ONENAND_PAGEBUF_ALLOC;
3979 kfree(this->page_buf);
3983 this->options |= ONENAND_OOBBUF_ALLOC;
3986 this->state = FL_READY;
3987 init_waitqueue_head(&this->wq);
3988 spin_lock_init(&this->chip_lock);
3991 * Allow subpage writes up to oobsize.
3993 switch (mtd->oobsize) {
3995 this->ecclayout = &onenand_oob_128;
3996 mtd->subpage_sft = 0;
3999 this->ecclayout = &onenand_oob_64;
4000 mtd->subpage_sft = 2;
4004 this->ecclayout = &onenand_oob_32;
4005 mtd->subpage_sft = 1;
4009 printk(KERN_WARNING "%s: No OOB scheme defined for oobsize %d\n",
4010 __func__, mtd->oobsize);
4011 mtd->subpage_sft = 0;
4012 /* To prevent kernel oops */
4013 this->ecclayout = &onenand_oob_32;
4017 this->subpagesize = mtd->writesize >> mtd->subpage_sft;
4020 * The number of bytes available for a client to place data into
4021 * the out of band area
4023 this->ecclayout->oobavail = 0;
4024 for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES &&
4025 this->ecclayout->oobfree[i].length; i++)
4026 this->ecclayout->oobavail +=
4027 this->ecclayout->oobfree[i].length;
4028 mtd->oobavail = this->ecclayout->oobavail;
4030 mtd->ecclayout = this->ecclayout;
4032 /* Fill in remaining MTD driver data */
4033 mtd->type = MTD_NANDFLASH;
4034 mtd->flags = MTD_CAP_NANDFLASH;
4035 mtd->erase = onenand_erase;
4037 mtd->unpoint = NULL;
4038 mtd->read = onenand_read;
4039 mtd->write = onenand_write;
4040 mtd->read_oob = onenand_read_oob;
4041 mtd->write_oob = onenand_write_oob;
4042 mtd->panic_write = onenand_panic_write;
4043 #ifdef CONFIG_MTD_ONENAND_OTP
4044 mtd->get_fact_prot_info = onenand_get_fact_prot_info;
4045 mtd->read_fact_prot_reg = onenand_read_fact_prot_reg;
4046 mtd->get_user_prot_info = onenand_get_user_prot_info;
4047 mtd->read_user_prot_reg = onenand_read_user_prot_reg;
4048 mtd->write_user_prot_reg = onenand_write_user_prot_reg;
4049 mtd->lock_user_prot_reg = onenand_lock_user_prot_reg;
4051 mtd->sync = onenand_sync;
4052 mtd->lock = onenand_lock;
4053 mtd->unlock = onenand_unlock;
4054 mtd->suspend = onenand_suspend;
4055 mtd->resume = onenand_resume;
4056 mtd->block_isbad = onenand_block_isbad;
4057 mtd->block_markbad = onenand_block_markbad;
4058 mtd->owner = THIS_MODULE;
4060 /* Unlock whole block */
4061 this->unlock_all(mtd);
4063 ret = this->scan_bbt(mtd);
4064 if ((!FLEXONENAND(this)) || ret)
4067 /* Change Flex-OneNAND boundaries if required */
4068 for (i = 0; i < MAX_DIES; i++)
4069 flexonenand_set_boundary(mtd, i, flex_bdry[2 * i],
4070 flex_bdry[(2 * i) + 1]);
4076 * onenand_release - [OneNAND Interface] Free resources held by the OneNAND device
4077 * @param mtd MTD device structure
4079 void onenand_release(struct mtd_info *mtd)
4081 struct onenand_chip *this = mtd->priv;
4083 #ifdef CONFIG_MTD_PARTITIONS
4084 /* Deregister partitions */
4085 del_mtd_partitions (mtd);
4087 /* Deregister the device */
4088 del_mtd_device (mtd);
4090 /* Free bad block table memory, if allocated */
4092 struct bbm_info *bbm = this->bbm;
4096 /* Buffers allocated by onenand_scan */
4097 if (this->options & ONENAND_PAGEBUF_ALLOC) {
4098 kfree(this->page_buf);
4099 #ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE
4100 kfree(this->verify_buf);
4103 if (this->options & ONENAND_OOBBUF_ALLOC)
4104 kfree(this->oob_buf);
4105 kfree(mtd->eraseregions);
4108 EXPORT_SYMBOL_GPL(onenand_scan);
4109 EXPORT_SYMBOL_GPL(onenand_release);
4111 MODULE_LICENSE("GPL");
4112 MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
4113 MODULE_DESCRIPTION("Generic OneNAND flash driver code");