2 * linux/drivers/mtd/onenand/onenand_base.c
4 * Copyright (C) 2005-2007 Samsung Electronics
5 * Kyungmin Park <kyungmin.park@samsung.com>
8 * Adrian Hunter <ext-adrian.hunter@nokia.com>:
9 * auto-placement support, read-while load support, various fixes
10 * Copyright (C) Nokia Corporation, 2007
12 * Rohit Hagargundgi <h.rohit at samsung.com>,
13 * Amul Kumar Saha <amul.saha@samsung.com>:
14 * Flex-OneNAND support
15 * Copyright (C) Samsung Electronics, 2009
17 * This program is free software; you can redistribute it and/or modify
18 * it under the terms of the GNU General Public License version 2 as
19 * published by the Free Software Foundation.
23 #include <linux/compat.h>
24 #include <linux/mtd/mtd.h>
25 #include <linux/mtd/onenand.h>
28 #include <asm/errno.h>
31 /* It should access 16-bit instead of 8-bit */
32 static void *memcpy_16(void *dst, const void *src, unsigned int len)
45 * onenand_oob_128 - oob info for Flex-Onenand with 4KB page
46 * For now, we expose only 64 out of 80 ecc bytes
48 static struct nand_ecclayout onenand_oob_128 = {
51 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
52 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
53 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
54 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
55 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
56 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
60 {2, 4}, {18, 4}, {34, 4}, {50, 4},
61 {66, 4}, {82, 4}, {98, 4}, {114, 4}
66 * onenand_oob_64 - oob info for large (2KB) page
68 static struct nand_ecclayout onenand_oob_64 = {
77 {2, 3}, {14, 2}, {18, 3}, {30, 2},
78 {34, 3}, {46, 2}, {50, 3}, {62, 2}
83 * onenand_oob_32 - oob info for middle (1KB) page
85 static struct nand_ecclayout onenand_oob_32 = {
91 .oobfree = { {2, 3}, {14, 2}, {18, 3}, {30, 2} }
94 static const unsigned char ffchars[] = {
95 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
96 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 16 */
97 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
98 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 32 */
99 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
100 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 48 */
101 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
102 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 64 */
103 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
104 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 80 */
105 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
106 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 96 */
107 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
108 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 112 */
109 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
110 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 128 */
114 * onenand_readw - [OneNAND Interface] Read OneNAND register
115 * @param addr address to read
117 * Read OneNAND register
119 static unsigned short onenand_readw(void __iomem * addr)
125 * onenand_writew - [OneNAND Interface] Write OneNAND register with value
126 * @param value value to write
127 * @param addr address to write
129 * Write OneNAND register with value
131 static void onenand_writew(unsigned short value, void __iomem * addr)
137 * onenand_block_address - [DEFAULT] Get block address
138 * @param device the device id
139 * @param block the block
140 * @return translated block address if DDP, otherwise same
142 * Setup Start Address 1 Register (F100h)
144 static int onenand_block_address(struct onenand_chip *this, int block)
146 /* Device Flash Core select, NAND Flash Block Address */
147 if (block & this->density_mask)
148 return ONENAND_DDP_CHIP1 | (block ^ this->density_mask);
154 * onenand_bufferram_address - [DEFAULT] Get bufferram address
155 * @param device the device id
156 * @param block the block
157 * @return set DBS value if DDP, otherwise 0
159 * Setup Start Address 2 Register (F101h) for DDP
161 static int onenand_bufferram_address(struct onenand_chip *this, int block)
163 /* Device BufferRAM Select */
164 if (block & this->density_mask)
165 return ONENAND_DDP_CHIP1;
167 return ONENAND_DDP_CHIP0;
171 * onenand_page_address - [DEFAULT] Get page address
172 * @param page the page address
173 * @param sector the sector address
174 * @return combined page and sector address
176 * Setup Start Address 8 Register (F107h)
178 static int onenand_page_address(int page, int sector)
180 /* Flash Page Address, Flash Sector Address */
183 fpa = page & ONENAND_FPA_MASK;
184 fsa = sector & ONENAND_FSA_MASK;
186 return ((fpa << ONENAND_FPA_SHIFT) | fsa);
190 * onenand_buffer_address - [DEFAULT] Get buffer address
191 * @param dataram1 DataRAM index
192 * @param sectors the sector address
193 * @param count the number of sectors
194 * @return the start buffer value
196 * Setup Start Buffer Register (F200h)
198 static int onenand_buffer_address(int dataram1, int sectors, int count)
202 /* BufferRAM Sector Address */
203 bsa = sectors & ONENAND_BSA_MASK;
206 bsa |= ONENAND_BSA_DATARAM1; /* DataRAM1 */
208 bsa |= ONENAND_BSA_DATARAM0; /* DataRAM0 */
210 /* BufferRAM Sector Count */
211 bsc = count & ONENAND_BSC_MASK;
213 return ((bsa << ONENAND_BSA_SHIFT) | bsc);
217 * flexonenand_block - Return block number for flash address
218 * @param this - OneNAND device structure
219 * @param addr - Address for which block number is needed
221 static unsigned int flexonenand_block(struct onenand_chip *this, loff_t addr)
223 unsigned int boundary, blk, die = 0;
225 if (ONENAND_IS_DDP(this) && addr >= this->diesize[0]) {
227 addr -= this->diesize[0];
230 boundary = this->boundary[die];
232 blk = addr >> (this->erase_shift - 1);
234 blk = (blk + boundary + 1) >> 1;
236 blk += die ? this->density_mask : 0;
240 unsigned int onenand_block(struct onenand_chip *this, loff_t addr)
242 if (!FLEXONENAND(this))
243 return addr >> this->erase_shift;
244 return flexonenand_block(this, addr);
248 * flexonenand_addr - Return address of the block
249 * @this: OneNAND device structure
250 * @block: Block number on Flex-OneNAND
252 * Return address of the block
254 static loff_t flexonenand_addr(struct onenand_chip *this, int block)
257 int die = 0, boundary;
259 if (ONENAND_IS_DDP(this) && block >= this->density_mask) {
260 block -= this->density_mask;
262 ofs = this->diesize[0];
265 boundary = this->boundary[die];
266 ofs += (loff_t) block << (this->erase_shift - 1);
267 if (block > (boundary + 1))
268 ofs += (loff_t) (block - boundary - 1)
269 << (this->erase_shift - 1);
273 loff_t onenand_addr(struct onenand_chip *this, int block)
275 if (!FLEXONENAND(this))
276 return (loff_t) block << this->erase_shift;
277 return flexonenand_addr(this, block);
281 * flexonenand_region - [Flex-OneNAND] Return erase region of addr
282 * @param mtd MTD device structure
283 * @param addr address whose erase region needs to be identified
285 int flexonenand_region(struct mtd_info *mtd, loff_t addr)
289 for (i = 0; i < mtd->numeraseregions; i++)
290 if (addr < mtd->eraseregions[i].offset)
296 * onenand_get_density - [DEFAULT] Get OneNAND density
297 * @param dev_id OneNAND device ID
299 * Get OneNAND density from device ID
301 static inline int onenand_get_density(int dev_id)
303 int density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT;
304 return (density & ONENAND_DEVICE_DENSITY_MASK);
308 * onenand_command - [DEFAULT] Send command to OneNAND device
309 * @param mtd MTD device structure
310 * @param cmd the command to be sent
311 * @param addr offset to read from or write to
312 * @param len number of bytes to read or write
314 * Send command to OneNAND device. This function is used for middle/large page
315 * devices (1KB/2KB Bytes per page)
317 static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr,
320 struct onenand_chip *this = mtd->priv;
324 /* Now we use page size operation */
325 int sectors = 0, count = 0;
327 /* Address translation */
329 case ONENAND_CMD_UNLOCK:
330 case ONENAND_CMD_LOCK:
331 case ONENAND_CMD_LOCK_TIGHT:
332 case ONENAND_CMD_UNLOCK_ALL:
337 case FLEXONENAND_CMD_PI_ACCESS:
338 /* addr contains die index */
339 block = addr * this->density_mask;
343 case ONENAND_CMD_ERASE:
344 case ONENAND_CMD_BUFFERRAM:
345 block = onenand_block(this, addr);
349 case FLEXONENAND_CMD_READ_PI:
350 cmd = ONENAND_CMD_READ;
351 block = addr * this->density_mask;
356 block = onenand_block(this, addr);
358 - onenand_addr(this, block)) >> this->page_shift;
359 page &= this->page_mask;
363 /* NOTE: The setting order of the registers is very important! */
364 if (cmd == ONENAND_CMD_BUFFERRAM) {
365 /* Select DataRAM for DDP */
366 value = onenand_bufferram_address(this, block);
367 this->write_word(value,
368 this->base + ONENAND_REG_START_ADDRESS2);
370 if (ONENAND_IS_4KB_PAGE(this))
371 ONENAND_SET_BUFFERRAM0(this);
373 /* Switch to the next data buffer */
374 ONENAND_SET_NEXT_BUFFERRAM(this);
380 /* Write 'DFS, FBA' of Flash */
381 value = onenand_block_address(this, block);
382 this->write_word(value,
383 this->base + ONENAND_REG_START_ADDRESS1);
385 /* Select DataRAM for DDP */
386 value = onenand_bufferram_address(this, block);
387 this->write_word(value,
388 this->base + ONENAND_REG_START_ADDRESS2);
395 case FLEXONENAND_CMD_RECOVER_LSB:
396 case ONENAND_CMD_READ:
397 case ONENAND_CMD_READOOB:
398 if (ONENAND_IS_4KB_PAGE(this))
399 dataram = ONENAND_SET_BUFFERRAM0(this);
401 dataram = ONENAND_SET_NEXT_BUFFERRAM(this);
406 dataram = ONENAND_CURRENT_BUFFERRAM(this);
410 /* Write 'FPA, FSA' of Flash */
411 value = onenand_page_address(page, sectors);
412 this->write_word(value,
413 this->base + ONENAND_REG_START_ADDRESS8);
415 /* Write 'BSA, BSC' of DataRAM */
416 value = onenand_buffer_address(dataram, sectors, count);
417 this->write_word(value, this->base + ONENAND_REG_START_BUFFER);
420 /* Interrupt clear */
421 this->write_word(ONENAND_INT_CLEAR, this->base + ONENAND_REG_INTERRUPT);
423 this->write_word(cmd, this->base + ONENAND_REG_COMMAND);
429 * onenand_read_ecc - return ecc status
430 * @param this onenand chip structure
432 static int onenand_read_ecc(struct onenand_chip *this)
436 if (!FLEXONENAND(this))
437 return this->read_word(this->base + ONENAND_REG_ECC_STATUS);
439 for (i = 0; i < 4; i++) {
440 ecc = this->read_word(this->base
441 + ((ONENAND_REG_ECC_STATUS + i) << 1));
444 if (ecc & FLEXONENAND_UNCORRECTABLE_ERROR)
445 return ONENAND_ECC_2BIT_ALL;
452 * onenand_wait - [DEFAULT] wait until the command is done
453 * @param mtd MTD device structure
454 * @param state state to select the max. timeout value
456 * Wait for command done. This applies to all OneNAND command
457 * Read can take up to 30us, erase up to 2ms and program up to 350us
458 * according to general OneNAND specs
460 static int onenand_wait(struct mtd_info *mtd, int state)
462 struct onenand_chip *this = mtd->priv;
463 unsigned int flags = ONENAND_INT_MASTER;
464 unsigned int interrupt = 0;
468 interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
469 if (interrupt & flags)
473 ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS);
475 if (interrupt & ONENAND_INT_READ) {
476 int ecc = onenand_read_ecc(this);
477 if (ecc & ONENAND_ECC_2BIT_ALL) {
478 printk("onenand_wait: ECC error = 0x%04x\n", ecc);
483 if (ctrl & ONENAND_CTRL_ERROR) {
484 printk("onenand_wait: controller error = 0x%04x\n", ctrl);
485 if (ctrl & ONENAND_CTRL_LOCK)
486 printk("onenand_wait: it's locked error = 0x%04x\n",
497 * onenand_bufferram_offset - [DEFAULT] BufferRAM offset
498 * @param mtd MTD data structure
499 * @param area BufferRAM area
500 * @return offset given area
502 * Return BufferRAM offset given area
504 static inline int onenand_bufferram_offset(struct mtd_info *mtd, int area)
506 struct onenand_chip *this = mtd->priv;
508 if (ONENAND_CURRENT_BUFFERRAM(this)) {
509 if (area == ONENAND_DATARAM)
510 return mtd->writesize;
511 if (area == ONENAND_SPARERAM)
519 * onenand_read_bufferram - [OneNAND Interface] Read the bufferram area
520 * @param mtd MTD data structure
521 * @param area BufferRAM area
522 * @param buffer the databuffer to put/get data
523 * @param offset offset to read from or write to
524 * @param count number of bytes to read/write
526 * Read the BufferRAM area
528 static int onenand_read_bufferram(struct mtd_info *mtd, loff_t addr, int area,
529 unsigned char *buffer, int offset,
532 struct onenand_chip *this = mtd->priv;
533 void __iomem *bufferram;
535 bufferram = this->base + area;
536 bufferram += onenand_bufferram_offset(mtd, area);
538 memcpy_16(buffer, bufferram + offset, count);
544 * onenand_sync_read_bufferram - [OneNAND Interface] Read the bufferram area with Sync. Burst mode
545 * @param mtd MTD data structure
546 * @param area BufferRAM area
547 * @param buffer the databuffer to put/get data
548 * @param offset offset to read from or write to
549 * @param count number of bytes to read/write
551 * Read the BufferRAM area with Sync. Burst Mode
553 static int onenand_sync_read_bufferram(struct mtd_info *mtd, loff_t addr, int area,
554 unsigned char *buffer, int offset,
557 struct onenand_chip *this = mtd->priv;
558 void __iomem *bufferram;
560 bufferram = this->base + area;
561 bufferram += onenand_bufferram_offset(mtd, area);
563 this->mmcontrol(mtd, ONENAND_SYS_CFG1_SYNC_READ);
565 memcpy_16(buffer, bufferram + offset, count);
567 this->mmcontrol(mtd, 0);
573 * onenand_write_bufferram - [OneNAND Interface] Write the bufferram area
574 * @param mtd MTD data structure
575 * @param area BufferRAM area
576 * @param buffer the databuffer to put/get data
577 * @param offset offset to read from or write to
578 * @param count number of bytes to read/write
580 * Write the BufferRAM area
582 static int onenand_write_bufferram(struct mtd_info *mtd, loff_t addr, int area,
583 const unsigned char *buffer, int offset,
586 struct onenand_chip *this = mtd->priv;
587 void __iomem *bufferram;
589 bufferram = this->base + area;
590 bufferram += onenand_bufferram_offset(mtd, area);
592 memcpy_16(bufferram + offset, buffer, count);
598 * onenand_get_2x_blockpage - [GENERIC] Get blockpage at 2x program mode
599 * @param mtd MTD data structure
600 * @param addr address to check
601 * @return blockpage address
603 * Get blockpage address at 2x program mode
605 static int onenand_get_2x_blockpage(struct mtd_info *mtd, loff_t addr)
607 struct onenand_chip *this = mtd->priv;
608 int blockpage, block, page;
610 /* Calculate the even block number */
611 block = (int) (addr >> this->erase_shift) & ~1;
612 /* Is it the odd plane? */
613 if (addr & this->writesize)
615 page = (int) (addr >> (this->page_shift + 1)) & this->page_mask;
616 blockpage = (block << 7) | page;
622 * onenand_check_bufferram - [GENERIC] Check BufferRAM information
623 * @param mtd MTD data structure
624 * @param addr address to check
625 * @return 1 if there are valid data, otherwise 0
627 * Check bufferram if there is data we required
629 static int onenand_check_bufferram(struct mtd_info *mtd, loff_t addr)
631 struct onenand_chip *this = mtd->priv;
632 int blockpage, found = 0;
635 if (ONENAND_IS_2PLANE(this))
636 blockpage = onenand_get_2x_blockpage(mtd, addr);
638 blockpage = (int) (addr >> this->page_shift);
640 /* Is there valid data? */
641 i = ONENAND_CURRENT_BUFFERRAM(this);
642 if (this->bufferram[i].blockpage == blockpage)
645 /* Check another BufferRAM */
646 i = ONENAND_NEXT_BUFFERRAM(this);
647 if (this->bufferram[i].blockpage == blockpage) {
648 ONENAND_SET_NEXT_BUFFERRAM(this);
653 if (found && ONENAND_IS_DDP(this)) {
654 /* Select DataRAM for DDP */
655 int block = onenand_block(this, addr);
656 int value = onenand_bufferram_address(this, block);
657 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
664 * onenand_update_bufferram - [GENERIC] Update BufferRAM information
665 * @param mtd MTD data structure
666 * @param addr address to update
667 * @param valid valid flag
669 * Update BufferRAM information
671 static int onenand_update_bufferram(struct mtd_info *mtd, loff_t addr,
674 struct onenand_chip *this = mtd->priv;
678 if (ONENAND_IS_2PLANE(this))
679 blockpage = onenand_get_2x_blockpage(mtd, addr);
681 blockpage = (int)(addr >> this->page_shift);
683 /* Invalidate another BufferRAM */
684 i = ONENAND_NEXT_BUFFERRAM(this);
685 if (this->bufferram[i].blockpage == blockpage)
686 this->bufferram[i].blockpage = -1;
688 /* Update BufferRAM */
689 i = ONENAND_CURRENT_BUFFERRAM(this);
691 this->bufferram[i].blockpage = blockpage;
693 this->bufferram[i].blockpage = -1;
699 * onenand_invalidate_bufferram - [GENERIC] Invalidate BufferRAM information
700 * @param mtd MTD data structure
701 * @param addr start address to invalidate
702 * @param len length to invalidate
704 * Invalidate BufferRAM information
706 static void onenand_invalidate_bufferram(struct mtd_info *mtd, loff_t addr,
709 struct onenand_chip *this = mtd->priv;
711 loff_t end_addr = addr + len;
713 /* Invalidate BufferRAM */
714 for (i = 0; i < MAX_BUFFERRAM; i++) {
715 loff_t buf_addr = this->bufferram[i].blockpage << this->page_shift;
717 if (buf_addr >= addr && buf_addr < end_addr)
718 this->bufferram[i].blockpage = -1;
723 * onenand_get_device - [GENERIC] Get chip for selected access
724 * @param mtd MTD device structure
725 * @param new_state the state which is requested
727 * Get the device and lock it for exclusive access
729 static void onenand_get_device(struct mtd_info *mtd, int new_state)
735 * onenand_release_device - [GENERIC] release chip
736 * @param mtd MTD device structure
738 * Deselect, release chip lock and wake up anyone waiting on the device
740 static void onenand_release_device(struct mtd_info *mtd)
746 * onenand_transfer_auto_oob - [INTERN] oob auto-placement transfer
747 * @param mtd MTD device structure
748 * @param buf destination address
749 * @param column oob offset to read from
750 * @param thislen oob length to read
752 static int onenand_transfer_auto_oob(struct mtd_info *mtd, uint8_t *buf,
753 int column, int thislen)
755 struct onenand_chip *this = mtd->priv;
756 struct nand_oobfree *free;
757 int readcol = column;
758 int readend = column + thislen;
761 uint8_t *oob_buf = this->oob_buf;
763 free = this->ecclayout->oobfree;
764 for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
765 if (readcol >= lastgap)
766 readcol += free->offset - lastgap;
767 if (readend >= lastgap)
768 readend += free->offset - lastgap;
769 lastgap = free->offset + free->length;
771 this->read_bufferram(mtd, 0, ONENAND_SPARERAM, oob_buf, 0, mtd->oobsize);
772 free = this->ecclayout->oobfree;
773 for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
774 int free_end = free->offset + free->length;
775 if (free->offset < readend && free_end > readcol) {
776 int st = max_t(int,free->offset,readcol);
777 int ed = min_t(int,free_end,readend);
779 memcpy(buf, oob_buf + st, n);
781 } else if (column == 0)
788 * onenand_recover_lsb - [Flex-OneNAND] Recover LSB page data
789 * @param mtd MTD device structure
790 * @param addr address to recover
791 * @param status return value from onenand_wait
793 * MLC NAND Flash cell has paired pages - LSB page and MSB page. LSB page has
794 * lower page address and MSB page has higher page address in paired pages.
795 * If power off occurs during MSB page program, the paired LSB page data can
796 * become corrupt. LSB page recovery read is a way to read LSB page though page
797 * data are corrupted. When uncorrectable error occurs as a result of LSB page
798 * read after power up, issue LSB page recovery read.
800 static int onenand_recover_lsb(struct mtd_info *mtd, loff_t addr, int status)
802 struct onenand_chip *this = mtd->priv;
805 /* Recovery is only for Flex-OneNAND */
806 if (!FLEXONENAND(this))
809 /* check if we failed due to uncorrectable error */
810 if (!mtd_is_eccerr(status) && status != ONENAND_BBT_READ_ECC_ERROR)
813 /* check if address lies in MLC region */
814 i = flexonenand_region(mtd, addr);
815 if (mtd->eraseregions[i].erasesize < (1 << this->erase_shift))
818 printk("onenand_recover_lsb:"
819 "Attempting to recover from uncorrectable read\n");
821 /* Issue the LSB page recovery command */
822 this->command(mtd, FLEXONENAND_CMD_RECOVER_LSB, addr, this->writesize);
823 return this->wait(mtd, FL_READING);
827 * onenand_read_ops_nolock - [OneNAND Interface] OneNAND read main and/or out-of-band
828 * @param mtd MTD device structure
829 * @param from offset to read from
830 * @param ops oob operation description structure
832 * OneNAND read main and/or out-of-band data
834 static int onenand_read_ops_nolock(struct mtd_info *mtd, loff_t from,
835 struct mtd_oob_ops *ops)
837 struct onenand_chip *this = mtd->priv;
838 struct mtd_ecc_stats stats;
839 size_t len = ops->len;
840 size_t ooblen = ops->ooblen;
841 u_char *buf = ops->datbuf;
842 u_char *oobbuf = ops->oobbuf;
843 int read = 0, column, thislen;
844 int oobread = 0, oobcolumn, thisooblen, oobsize;
845 int ret = 0, boundary = 0;
846 int writesize = this->writesize;
848 MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_read_ops_nolock: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
850 if (ops->mode == MTD_OPS_AUTO_OOB)
851 oobsize = this->ecclayout->oobavail;
853 oobsize = mtd->oobsize;
855 oobcolumn = from & (mtd->oobsize - 1);
857 /* Do not allow reads past end of device */
858 if ((from + len) > mtd->size) {
859 printk(KERN_ERR "onenand_read_ops_nolock: Attempt read beyond end of device\n");
865 stats = mtd->ecc_stats;
867 /* Read-while-load method */
868 /* Note: We can't use this feature in MLC */
870 /* Do first load to bufferRAM */
872 if (!onenand_check_bufferram(mtd, from)) {
873 this->main_buf = buf;
874 this->command(mtd, ONENAND_CMD_READ, from, writesize);
875 ret = this->wait(mtd, FL_READING);
877 ret = onenand_recover_lsb(mtd, from, ret);
878 onenand_update_bufferram(mtd, from, !ret);
884 thislen = min_t(int, writesize, len - read);
885 column = from & (writesize - 1);
886 if (column + thislen > writesize)
887 thislen = writesize - column;
890 /* If there is more to load then start next load */
892 if (!ONENAND_IS_4KB_PAGE(this) && read + thislen < len) {
893 this->main_buf = buf + thislen;
894 this->command(mtd, ONENAND_CMD_READ, from, writesize);
896 * Chip boundary handling in DDP
897 * Now we issued chip 1 read and pointed chip 1
898 * bufferam so we have to point chip 0 bufferam.
900 if (ONENAND_IS_DDP(this) &&
901 unlikely(from == (this->chipsize >> 1))) {
902 this->write_word(ONENAND_DDP_CHIP0, this->base + ONENAND_REG_START_ADDRESS2);
906 ONENAND_SET_PREV_BUFFERRAM(this);
909 /* While load is going, read from last bufferRAM */
910 this->read_bufferram(mtd, from - thislen, ONENAND_DATARAM, buf, column, thislen);
912 /* Read oob area if needed */
914 thisooblen = oobsize - oobcolumn;
915 thisooblen = min_t(int, thisooblen, ooblen - oobread);
917 if (ops->mode == MTD_OPS_AUTO_OOB)
918 onenand_transfer_auto_oob(mtd, oobbuf, oobcolumn, thisooblen);
920 this->read_bufferram(mtd, 0, ONENAND_SPARERAM, oobbuf, oobcolumn, thisooblen);
921 oobread += thisooblen;
922 oobbuf += thisooblen;
926 if (ONENAND_IS_4KB_PAGE(this) && (read + thislen < len)) {
927 this->command(mtd, ONENAND_CMD_READ, from, writesize);
928 ret = this->wait(mtd, FL_READING);
930 ret = onenand_recover_lsb(mtd, from, ret);
931 onenand_update_bufferram(mtd, from, !ret);
932 if (mtd_is_eccerr(ret))
936 /* See if we are done */
940 /* Set up for next read from bufferRAM */
941 if (unlikely(boundary))
942 this->write_word(ONENAND_DDP_CHIP1, this->base + ONENAND_REG_START_ADDRESS2);
943 if (!ONENAND_IS_4KB_PAGE(this))
944 ONENAND_SET_NEXT_BUFFERRAM(this);
946 thislen = min_t(int, writesize, len - read);
949 if (!ONENAND_IS_4KB_PAGE(this)) {
950 /* Now wait for load */
951 ret = this->wait(mtd, FL_READING);
952 onenand_update_bufferram(mtd, from, !ret);
953 if (mtd_is_eccerr(ret))
959 * Return success, if no ECC failures, else -EBADMSG
960 * fs driver will take care of that, because
961 * retlen == desired len and result == -EBADMSG
964 ops->oobretlen = oobread;
969 if (mtd->ecc_stats.failed - stats.failed)
972 /* return max bitflips per ecc step; ONENANDs correct 1 bit only */
973 return mtd->ecc_stats.corrected != stats.corrected ? 1 : 0;
977 * onenand_read_oob_nolock - [MTD Interface] OneNAND read out-of-band
978 * @param mtd MTD device structure
979 * @param from offset to read from
980 * @param ops oob operation description structure
982 * OneNAND read out-of-band data from the spare area
984 static int onenand_read_oob_nolock(struct mtd_info *mtd, loff_t from,
985 struct mtd_oob_ops *ops)
987 struct onenand_chip *this = mtd->priv;
988 struct mtd_ecc_stats stats;
989 int read = 0, thislen, column, oobsize;
990 size_t len = ops->ooblen;
991 unsigned int mode = ops->mode;
992 u_char *buf = ops->oobbuf;
993 int ret = 0, readcmd;
995 from += ops->ooboffs;
997 MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_read_oob_nolock: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
999 /* Initialize return length value */
1002 if (mode == MTD_OPS_AUTO_OOB)
1003 oobsize = this->ecclayout->oobavail;
1005 oobsize = mtd->oobsize;
1007 column = from & (mtd->oobsize - 1);
1009 if (unlikely(column >= oobsize)) {
1010 printk(KERN_ERR "onenand_read_oob_nolock: Attempted to start read outside oob\n");
1014 /* Do not allow reads past end of device */
1015 if (unlikely(from >= mtd->size ||
1016 column + len > ((mtd->size >> this->page_shift) -
1017 (from >> this->page_shift)) * oobsize)) {
1018 printk(KERN_ERR "onenand_read_oob_nolock: Attempted to read beyond end of device\n");
1022 stats = mtd->ecc_stats;
1024 readcmd = ONENAND_IS_4KB_PAGE(this) ?
1025 ONENAND_CMD_READ : ONENAND_CMD_READOOB;
1027 while (read < len) {
1028 thislen = oobsize - column;
1029 thislen = min_t(int, thislen, len);
1031 this->spare_buf = buf;
1032 this->command(mtd, readcmd, from, mtd->oobsize);
1034 onenand_update_bufferram(mtd, from, 0);
1036 ret = this->wait(mtd, FL_READING);
1038 ret = onenand_recover_lsb(mtd, from, ret);
1040 if (ret && ret != -EBADMSG) {
1041 printk(KERN_ERR "onenand_read_oob_nolock: read failed = 0x%x\n", ret);
1045 if (mode == MTD_OPS_AUTO_OOB)
1046 onenand_transfer_auto_oob(mtd, buf, column, thislen);
1048 this->read_bufferram(mtd, 0, ONENAND_SPARERAM, buf, column, thislen);
1060 from += mtd->writesize;
1065 ops->oobretlen = read;
1070 if (mtd->ecc_stats.failed - stats.failed)
1077 * onenand_read - [MTD Interface] MTD compability function for onenand_read_ecc
1078 * @param mtd MTD device structure
1079 * @param from offset to read from
1080 * @param len number of bytes to read
1081 * @param retlen pointer to variable to store the number of read bytes
1082 * @param buf the databuffer to put data
1084 * This function simply calls onenand_read_ecc with oob buffer and oobsel = NULL
1086 int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
1087 size_t * retlen, u_char * buf)
1089 struct mtd_oob_ops ops = {
1097 onenand_get_device(mtd, FL_READING);
1098 ret = onenand_read_ops_nolock(mtd, from, &ops);
1099 onenand_release_device(mtd);
1101 *retlen = ops.retlen;
1106 * onenand_read_oob - [MTD Interface] OneNAND read out-of-band
1107 * @param mtd MTD device structure
1108 * @param from offset to read from
1109 * @param ops oob operations description structure
1111 * OneNAND main and/or out-of-band
1113 int onenand_read_oob(struct mtd_info *mtd, loff_t from,
1114 struct mtd_oob_ops *ops)
1118 switch (ops->mode) {
1119 case MTD_OPS_PLACE_OOB:
1120 case MTD_OPS_AUTO_OOB:
1123 /* Not implemented yet */
1128 onenand_get_device(mtd, FL_READING);
1130 ret = onenand_read_ops_nolock(mtd, from, ops);
1132 ret = onenand_read_oob_nolock(mtd, from, ops);
1133 onenand_release_device(mtd);
1139 * onenand_bbt_wait - [DEFAULT] wait until the command is done
1140 * @param mtd MTD device structure
1141 * @param state state to select the max. timeout value
1143 * Wait for command done.
1145 static int onenand_bbt_wait(struct mtd_info *mtd, int state)
1147 struct onenand_chip *this = mtd->priv;
1148 unsigned int flags = ONENAND_INT_MASTER;
1149 unsigned int interrupt;
1153 interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
1154 if (interrupt & flags)
1158 /* To get correct interrupt status in timeout case */
1159 interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
1160 ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS);
1162 if (interrupt & ONENAND_INT_READ) {
1163 int ecc = onenand_read_ecc(this);
1164 if (ecc & ONENAND_ECC_2BIT_ALL) {
1165 printk(KERN_INFO "onenand_bbt_wait: ecc error = 0x%04x"
1166 ", controller = 0x%04x\n", ecc, ctrl);
1167 return ONENAND_BBT_READ_ERROR;
1170 printk(KERN_ERR "onenand_bbt_wait: read timeout!"
1171 "ctrl=0x%04x intr=0x%04x\n", ctrl, interrupt);
1172 return ONENAND_BBT_READ_FATAL_ERROR;
1175 /* Initial bad block case: 0x2400 or 0x0400 */
1176 if (ctrl & ONENAND_CTRL_ERROR) {
1177 printk(KERN_DEBUG "onenand_bbt_wait: controller error = 0x%04x\n", ctrl);
1178 return ONENAND_BBT_READ_ERROR;
1185 * onenand_bbt_read_oob - [MTD Interface] OneNAND read out-of-band for bbt scan
1186 * @param mtd MTD device structure
1187 * @param from offset to read from
1188 * @param ops oob operation description structure
1190 * OneNAND read out-of-band data from the spare area for bbt scan
1192 int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
1193 struct mtd_oob_ops *ops)
1195 struct onenand_chip *this = mtd->priv;
1196 int read = 0, thislen, column;
1197 int ret = 0, readcmd;
1198 size_t len = ops->ooblen;
1199 u_char *buf = ops->oobbuf;
1201 MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_bbt_read_oob: from = 0x%08x, len = %zi\n", (unsigned int) from, len);
1203 readcmd = ONENAND_IS_4KB_PAGE(this) ?
1204 ONENAND_CMD_READ : ONENAND_CMD_READOOB;
1206 /* Initialize return value */
1209 /* Do not allow reads past end of device */
1210 if (unlikely((from + len) > mtd->size)) {
1211 printk(KERN_ERR "onenand_bbt_read_oob: Attempt read beyond end of device\n");
1212 return ONENAND_BBT_READ_FATAL_ERROR;
1215 /* Grab the lock and see if the device is available */
1216 onenand_get_device(mtd, FL_READING);
1218 column = from & (mtd->oobsize - 1);
1220 while (read < len) {
1222 thislen = mtd->oobsize - column;
1223 thislen = min_t(int, thislen, len);
1225 this->spare_buf = buf;
1226 this->command(mtd, readcmd, from, mtd->oobsize);
1228 onenand_update_bufferram(mtd, from, 0);
1230 ret = this->bbt_wait(mtd, FL_READING);
1232 ret = onenand_recover_lsb(mtd, from, ret);
1237 this->read_bufferram(mtd, 0, ONENAND_SPARERAM, buf, column, thislen);
1246 /* Update Page size */
1247 from += this->writesize;
1252 /* Deselect and wake up anyone waiting on the device */
1253 onenand_release_device(mtd);
1255 ops->oobretlen = read;
1260 #ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE
1262 * onenand_verify_oob - [GENERIC] verify the oob contents after a write
1263 * @param mtd MTD device structure
1264 * @param buf the databuffer to verify
1265 * @param to offset to read from
1267 static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to)
1269 struct onenand_chip *this = mtd->priv;
1270 u_char *oob_buf = this->oob_buf;
1271 int status, i, readcmd;
1273 readcmd = ONENAND_IS_4KB_PAGE(this) ?
1274 ONENAND_CMD_READ : ONENAND_CMD_READOOB;
1276 this->command(mtd, readcmd, to, mtd->oobsize);
1277 onenand_update_bufferram(mtd, to, 0);
1278 status = this->wait(mtd, FL_READING);
1282 this->read_bufferram(mtd, 0, ONENAND_SPARERAM, oob_buf, 0, mtd->oobsize);
1283 for (i = 0; i < mtd->oobsize; i++)
1284 if (buf[i] != 0xFF && buf[i] != oob_buf[i])
1291 * onenand_verify - [GENERIC] verify the chip contents after a write
1292 * @param mtd MTD device structure
1293 * @param buf the databuffer to verify
1294 * @param addr offset to read from
1295 * @param len number of bytes to read and compare
1297 static int onenand_verify(struct mtd_info *mtd, const u_char *buf, loff_t addr, size_t len)
1299 struct onenand_chip *this = mtd->priv;
1300 void __iomem *dataram;
1302 int thislen, column;
1305 thislen = min_t(int, this->writesize, len);
1306 column = addr & (this->writesize - 1);
1307 if (column + thislen > this->writesize)
1308 thislen = this->writesize - column;
1310 this->command(mtd, ONENAND_CMD_READ, addr, this->writesize);
1312 onenand_update_bufferram(mtd, addr, 0);
1314 ret = this->wait(mtd, FL_READING);
1318 onenand_update_bufferram(mtd, addr, 1);
1320 dataram = this->base + ONENAND_DATARAM;
1321 dataram += onenand_bufferram_offset(mtd, ONENAND_DATARAM);
1323 if (memcmp(buf, dataram + column, thislen))
1334 #define onenand_verify(...) (0)
1335 #define onenand_verify_oob(...) (0)
1338 #define NOTALIGNED(x) ((x & (this->subpagesize - 1)) != 0)
1341 * onenand_fill_auto_oob - [INTERN] oob auto-placement transfer
1342 * @param mtd MTD device structure
1343 * @param oob_buf oob buffer
1344 * @param buf source address
1345 * @param column oob offset to write to
1346 * @param thislen oob length to write
1348 static int onenand_fill_auto_oob(struct mtd_info *mtd, u_char *oob_buf,
1349 const u_char *buf, int column, int thislen)
1351 struct onenand_chip *this = mtd->priv;
1352 struct nand_oobfree *free;
1353 int writecol = column;
1354 int writeend = column + thislen;
1358 free = this->ecclayout->oobfree;
1359 for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
1360 if (writecol >= lastgap)
1361 writecol += free->offset - lastgap;
1362 if (writeend >= lastgap)
1363 writeend += free->offset - lastgap;
1364 lastgap = free->offset + free->length;
1366 free = this->ecclayout->oobfree;
1367 for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
1368 int free_end = free->offset + free->length;
1369 if (free->offset < writeend && free_end > writecol) {
1370 int st = max_t(int,free->offset,writecol);
1371 int ed = min_t(int,free_end,writeend);
1373 memcpy(oob_buf + st, buf, n);
1375 } else if (column == 0)
1382 * onenand_write_ops_nolock - [OneNAND Interface] write main and/or out-of-band
1383 * @param mtd MTD device structure
1384 * @param to offset to write to
1385 * @param ops oob operation description structure
1387 * Write main and/or oob with ECC
1389 static int onenand_write_ops_nolock(struct mtd_info *mtd, loff_t to,
1390 struct mtd_oob_ops *ops)
1392 struct onenand_chip *this = mtd->priv;
1393 int written = 0, column, thislen, subpage;
1394 int oobwritten = 0, oobcolumn, thisooblen, oobsize;
1395 size_t len = ops->len;
1396 size_t ooblen = ops->ooblen;
1397 const u_char *buf = ops->datbuf;
1398 const u_char *oob = ops->oobbuf;
1402 MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_write_ops_nolock: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
1404 /* Initialize retlen, in case of early exit */
1408 /* Reject writes, which are not page aligned */
1409 if (unlikely(NOTALIGNED(to) || NOTALIGNED(len))) {
1410 printk(KERN_ERR "onenand_write_ops_nolock: Attempt to write not page aligned data\n");
1414 if (ops->mode == MTD_OPS_AUTO_OOB)
1415 oobsize = this->ecclayout->oobavail;
1417 oobsize = mtd->oobsize;
1419 oobcolumn = to & (mtd->oobsize - 1);
1421 column = to & (mtd->writesize - 1);
1423 /* Loop until all data write */
1424 while (written < len) {
1425 u_char *wbuf = (u_char *) buf;
1427 thislen = min_t(int, mtd->writesize - column, len - written);
1428 thisooblen = min_t(int, oobsize - oobcolumn, ooblen - oobwritten);
1430 this->command(mtd, ONENAND_CMD_BUFFERRAM, to, thislen);
1432 /* Partial page write */
1433 subpage = thislen < mtd->writesize;
1435 memset(this->page_buf, 0xff, mtd->writesize);
1436 memcpy(this->page_buf + column, buf, thislen);
1437 wbuf = this->page_buf;
1440 this->write_bufferram(mtd, to, ONENAND_DATARAM, wbuf, 0, mtd->writesize);
1443 oobbuf = this->oob_buf;
1445 /* We send data to spare ram with oobsize
1446 * * to prevent byte access */
1447 memset(oobbuf, 0xff, mtd->oobsize);
1448 if (ops->mode == MTD_OPS_AUTO_OOB)
1449 onenand_fill_auto_oob(mtd, oobbuf, oob, oobcolumn, thisooblen);
1451 memcpy(oobbuf + oobcolumn, oob, thisooblen);
1453 oobwritten += thisooblen;
1457 oobbuf = (u_char *) ffchars;
1459 this->write_bufferram(mtd, 0, ONENAND_SPARERAM, oobbuf, 0, mtd->oobsize);
1461 this->command(mtd, ONENAND_CMD_PROG, to, mtd->writesize);
1463 ret = this->wait(mtd, FL_WRITING);
1465 /* In partial page write we don't update bufferram */
1466 onenand_update_bufferram(mtd, to, !ret && !subpage);
1467 if (ONENAND_IS_2PLANE(this)) {
1468 ONENAND_SET_BUFFERRAM1(this);
1469 onenand_update_bufferram(mtd, to + this->writesize, !ret && !subpage);
1473 printk(KERN_ERR "onenand_write_ops_nolock: write filaed %d\n", ret);
1477 /* Only check verify write turn on */
1478 ret = onenand_verify(mtd, buf, to, thislen);
1480 printk(KERN_ERR "onenand_write_ops_nolock: verify failed %d\n", ret);
1494 ops->retlen = written;
1500 * onenand_write_oob_nolock - [INTERN] OneNAND write out-of-band
1501 * @param mtd MTD device structure
1502 * @param to offset to write to
1503 * @param len number of bytes to write
1504 * @param retlen pointer to variable to store the number of written bytes
1505 * @param buf the data to write
1506 * @param mode operation mode
1508 * OneNAND write out-of-band
1510 static int onenand_write_oob_nolock(struct mtd_info *mtd, loff_t to,
1511 struct mtd_oob_ops *ops)
1513 struct onenand_chip *this = mtd->priv;
1514 int column, ret = 0, oobsize;
1515 int written = 0, oobcmd;
1517 size_t len = ops->ooblen;
1518 const u_char *buf = ops->oobbuf;
1519 unsigned int mode = ops->mode;
1523 MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_write_oob_nolock: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
1525 /* Initialize retlen, in case of early exit */
1528 if (mode == MTD_OPS_AUTO_OOB)
1529 oobsize = this->ecclayout->oobavail;
1531 oobsize = mtd->oobsize;
1533 column = to & (mtd->oobsize - 1);
1535 if (unlikely(column >= oobsize)) {
1536 printk(KERN_ERR "onenand_write_oob_nolock: Attempted to start write outside oob\n");
1540 /* For compatibility with NAND: Do not allow write past end of page */
1541 if (unlikely(column + len > oobsize)) {
1542 printk(KERN_ERR "onenand_write_oob_nolock: "
1543 "Attempt to write past end of page\n");
1547 /* Do not allow reads past end of device */
1548 if (unlikely(to >= mtd->size ||
1549 column + len > ((mtd->size >> this->page_shift) -
1550 (to >> this->page_shift)) * oobsize)) {
1551 printk(KERN_ERR "onenand_write_oob_nolock: Attempted to write past end of device\n");
1555 oobbuf = this->oob_buf;
1557 oobcmd = ONENAND_IS_4KB_PAGE(this) ?
1558 ONENAND_CMD_PROG : ONENAND_CMD_PROGOOB;
1560 /* Loop until all data write */
1561 while (written < len) {
1562 int thislen = min_t(int, oobsize, len - written);
1564 this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->oobsize);
1566 /* We send data to spare ram with oobsize
1567 * to prevent byte access */
1568 memset(oobbuf, 0xff, mtd->oobsize);
1569 if (mode == MTD_OPS_AUTO_OOB)
1570 onenand_fill_auto_oob(mtd, oobbuf, buf, column, thislen);
1572 memcpy(oobbuf + column, buf, thislen);
1573 this->write_bufferram(mtd, 0, ONENAND_SPARERAM, oobbuf, 0, mtd->oobsize);
1575 if (ONENAND_IS_4KB_PAGE(this)) {
1576 /* Set main area of DataRAM to 0xff*/
1577 memset(this->page_buf, 0xff, mtd->writesize);
1578 this->write_bufferram(mtd, 0, ONENAND_DATARAM,
1579 this->page_buf, 0, mtd->writesize);
1582 this->command(mtd, oobcmd, to, mtd->oobsize);
1584 onenand_update_bufferram(mtd, to, 0);
1585 if (ONENAND_IS_2PLANE(this)) {
1586 ONENAND_SET_BUFFERRAM1(this);
1587 onenand_update_bufferram(mtd, to + this->writesize, 0);
1590 ret = this->wait(mtd, FL_WRITING);
1592 printk(KERN_ERR "onenand_write_oob_nolock: write failed %d\n", ret);
1596 ret = onenand_verify_oob(mtd, oobbuf, to);
1598 printk(KERN_ERR "onenand_write_oob_nolock: verify failed %d\n", ret);
1606 to += mtd->writesize;
1611 ops->oobretlen = written;
1617 * onenand_write - [MTD Interface] compability function for onenand_write_ecc
1618 * @param mtd MTD device structure
1619 * @param to offset to write to
1620 * @param len number of bytes to write
1621 * @param retlen pointer to variable to store the number of written bytes
1622 * @param buf the data to write
1626 int onenand_write(struct mtd_info *mtd, loff_t to, size_t len,
1627 size_t * retlen, const u_char * buf)
1629 struct mtd_oob_ops ops = {
1632 .datbuf = (u_char *) buf,
1637 onenand_get_device(mtd, FL_WRITING);
1638 ret = onenand_write_ops_nolock(mtd, to, &ops);
1639 onenand_release_device(mtd);
1641 *retlen = ops.retlen;
1646 * onenand_write_oob - [MTD Interface] OneNAND write out-of-band
1647 * @param mtd MTD device structure
1648 * @param to offset to write to
1649 * @param ops oob operation description structure
1651 * OneNAND write main and/or out-of-band
1653 int onenand_write_oob(struct mtd_info *mtd, loff_t to,
1654 struct mtd_oob_ops *ops)
1658 switch (ops->mode) {
1659 case MTD_OPS_PLACE_OOB:
1660 case MTD_OPS_AUTO_OOB:
1663 /* Not implemented yet */
1668 onenand_get_device(mtd, FL_WRITING);
1670 ret = onenand_write_ops_nolock(mtd, to, ops);
1672 ret = onenand_write_oob_nolock(mtd, to, ops);
1673 onenand_release_device(mtd);
1680 * onenand_block_isbad_nolock - [GENERIC] Check if a block is marked bad
1681 * @param mtd MTD device structure
1682 * @param ofs offset from device start
1683 * @param allowbbt 1, if its allowed to access the bbt area
1685 * Check, if the block is bad, Either by reading the bad block table or
1686 * calling of the scan function.
1688 static int onenand_block_isbad_nolock(struct mtd_info *mtd, loff_t ofs, int allowbbt)
1690 struct onenand_chip *this = mtd->priv;
1691 struct bbm_info *bbm = this->bbm;
1693 /* Return info from the table */
1694 return bbm->isbad_bbt(mtd, ofs, allowbbt);
1699 * onenand_erase - [MTD Interface] erase block(s)
1700 * @param mtd MTD device structure
1701 * @param instr erase instruction
1703 * Erase one ore more blocks
1705 int onenand_erase(struct mtd_info *mtd, struct erase_info *instr)
1707 struct onenand_chip *this = mtd->priv;
1708 unsigned int block_size;
1709 loff_t addr = instr->addr;
1710 unsigned int len = instr->len;
1712 struct mtd_erase_region_info *region = NULL;
1713 unsigned int region_end = 0;
1715 MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_erase: start = 0x%08x, len = %i\n",
1716 (unsigned int) addr, len);
1718 if (FLEXONENAND(this)) {
1719 /* Find the eraseregion of this address */
1720 i = flexonenand_region(mtd, addr);
1721 region = &mtd->eraseregions[i];
1723 block_size = region->erasesize;
1724 region_end = region->offset
1725 + region->erasesize * region->numblocks;
1727 /* Start address within region must align on block boundary.
1728 * Erase region's start offset is always block start address.
1730 if (unlikely((addr - region->offset) & (block_size - 1))) {
1731 MTDDEBUG(MTD_DEBUG_LEVEL0, "onenand_erase:"
1732 " Unaligned address\n");
1736 block_size = 1 << this->erase_shift;
1738 /* Start address must align on block boundary */
1739 if (unlikely(addr & (block_size - 1))) {
1740 MTDDEBUG(MTD_DEBUG_LEVEL0, "onenand_erase:"
1741 "Unaligned address\n");
1746 /* Length must align on block boundary */
1747 if (unlikely(len & (block_size - 1))) {
1748 MTDDEBUG (MTD_DEBUG_LEVEL0,
1749 "onenand_erase: Length not block aligned\n");
1753 /* Grab the lock and see if the device is available */
1754 onenand_get_device(mtd, FL_ERASING);
1756 /* Loop throught the pages */
1757 instr->state = MTD_ERASING;
1761 /* Check if we have a bad block, we do not erase bad blocks */
1762 if (instr->priv == 0 && onenand_block_isbad_nolock(mtd, addr, 0)) {
1763 printk(KERN_WARNING "onenand_erase: attempt to erase"
1764 " a bad block at addr 0x%08x\n",
1765 (unsigned int) addr);
1766 instr->state = MTD_ERASE_FAILED;
1770 this->command(mtd, ONENAND_CMD_ERASE, addr, block_size);
1772 onenand_invalidate_bufferram(mtd, addr, block_size);
1774 ret = this->wait(mtd, FL_ERASING);
1775 /* Check, if it is write protected */
1778 MTDDEBUG (MTD_DEBUG_LEVEL0, "onenand_erase: "
1779 "Device is write protected!!!\n");
1781 MTDDEBUG (MTD_DEBUG_LEVEL0, "onenand_erase: "
1782 "Failed erase, block %d\n",
1783 onenand_block(this, addr));
1784 instr->state = MTD_ERASE_FAILED;
1785 instr->fail_addr = addr;
1793 if (addr == region_end) {
1798 block_size = region->erasesize;
1799 region_end = region->offset
1800 + region->erasesize * region->numblocks;
1802 if (len & (block_size - 1)) {
1803 /* This has been checked at MTD
1804 * partitioning level. */
1805 printk("onenand_erase: Unaligned address\n");
1811 instr->state = MTD_ERASE_DONE;
1815 ret = instr->state == MTD_ERASE_DONE ? 0 : -EIO;
1816 /* Do call back function */
1818 mtd_erase_callback(instr);
1820 /* Deselect and wake up anyone waiting on the device */
1821 onenand_release_device(mtd);
1827 * onenand_sync - [MTD Interface] sync
1828 * @param mtd MTD device structure
1830 * Sync is actually a wait for chip ready function
1832 void onenand_sync(struct mtd_info *mtd)
1834 MTDDEBUG (MTD_DEBUG_LEVEL3, "onenand_sync: called\n");
1836 /* Grab the lock and see if the device is available */
1837 onenand_get_device(mtd, FL_SYNCING);
1839 /* Release it and go back */
1840 onenand_release_device(mtd);
1844 * onenand_block_isbad - [MTD Interface] Check whether the block at the given offset is bad
1845 * @param mtd MTD device structure
1846 * @param ofs offset relative to mtd start
1848 * Check whether the block is bad
1850 int onenand_block_isbad(struct mtd_info *mtd, loff_t ofs)
1854 /* Check for invalid offset */
1855 if (ofs > mtd->size)
1858 onenand_get_device(mtd, FL_READING);
1859 ret = onenand_block_isbad_nolock(mtd,ofs, 0);
1860 onenand_release_device(mtd);
1865 * onenand_default_block_markbad - [DEFAULT] mark a block bad
1866 * @param mtd MTD device structure
1867 * @param ofs offset from device start
1869 * This is the default implementation, which can be overridden by
1870 * a hardware specific driver.
1872 static int onenand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
1874 struct onenand_chip *this = mtd->priv;
1875 struct bbm_info *bbm = this->bbm;
1876 u_char buf[2] = {0, 0};
1877 struct mtd_oob_ops ops = {
1878 .mode = MTD_OPS_PLACE_OOB,
1885 /* Get block number */
1886 block = onenand_block(this, ofs);
1888 bbm->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1);
1890 /* We write two bytes, so we dont have to mess with 16 bit access */
1891 ofs += mtd->oobsize + (bbm->badblockpos & ~0x01);
1892 return onenand_write_oob_nolock(mtd, ofs, &ops);
1896 * onenand_block_markbad - [MTD Interface] Mark the block at the given offset as bad
1897 * @param mtd MTD device structure
1898 * @param ofs offset relative to mtd start
1900 * Mark the block as bad
1902 int onenand_block_markbad(struct mtd_info *mtd, loff_t ofs)
1906 ret = onenand_block_isbad(mtd, ofs);
1908 /* If it was bad already, return success and do nothing */
1914 ret = mtd_block_markbad(mtd, ofs);
1919 * onenand_do_lock_cmd - [OneNAND Interface] Lock or unlock block(s)
1920 * @param mtd MTD device structure
1921 * @param ofs offset relative to mtd start
1922 * @param len number of bytes to lock or unlock
1923 * @param cmd lock or unlock command
1925 * Lock or unlock one or more blocks
1927 static int onenand_do_lock_cmd(struct mtd_info *mtd, loff_t ofs, size_t len, int cmd)
1929 struct onenand_chip *this = mtd->priv;
1930 int start, end, block, value, status;
1932 start = onenand_block(this, ofs);
1933 end = onenand_block(this, ofs + len);
1935 /* Continuous lock scheme */
1936 if (this->options & ONENAND_HAS_CONT_LOCK) {
1937 /* Set start block address */
1938 this->write_word(start,
1939 this->base + ONENAND_REG_START_BLOCK_ADDRESS);
1940 /* Set end block address */
1941 this->write_word(end - 1,
1942 this->base + ONENAND_REG_END_BLOCK_ADDRESS);
1943 /* Write unlock command */
1944 this->command(mtd, cmd, 0, 0);
1946 /* There's no return value */
1947 this->wait(mtd, FL_UNLOCKING);
1950 while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
1951 & ONENAND_CTRL_ONGO)
1954 /* Check lock status */
1955 status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
1956 if (!(status & ONENAND_WP_US))
1957 printk(KERN_ERR "wp status = 0x%x\n", status);
1962 /* Block lock scheme */
1963 for (block = start; block < end; block++) {
1964 /* Set block address */
1965 value = onenand_block_address(this, block);
1966 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
1967 /* Select DataRAM for DDP */
1968 value = onenand_bufferram_address(this, block);
1969 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
1971 /* Set start block address */
1972 this->write_word(block,
1973 this->base + ONENAND_REG_START_BLOCK_ADDRESS);
1974 /* Write unlock command */
1975 this->command(mtd, ONENAND_CMD_UNLOCK, 0, 0);
1977 /* There's no return value */
1978 this->wait(mtd, FL_UNLOCKING);
1981 while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
1982 & ONENAND_CTRL_ONGO)
1985 /* Check lock status */
1986 status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
1987 if (!(status & ONENAND_WP_US))
1988 printk(KERN_ERR "block = %d, wp status = 0x%x\n",
1995 #ifdef ONENAND_LINUX
1997 * onenand_lock - [MTD Interface] Lock block(s)
1998 * @param mtd MTD device structure
1999 * @param ofs offset relative to mtd start
2000 * @param len number of bytes to unlock
2002 * Lock one or more blocks
2004 static int onenand_lock(struct mtd_info *mtd, loff_t ofs, size_t len)
2008 onenand_get_device(mtd, FL_LOCKING);
2009 ret = onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_LOCK);
2010 onenand_release_device(mtd);
2015 * onenand_unlock - [MTD Interface] Unlock block(s)
2016 * @param mtd MTD device structure
2017 * @param ofs offset relative to mtd start
2018 * @param len number of bytes to unlock
2020 * Unlock one or more blocks
2022 static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
2026 onenand_get_device(mtd, FL_LOCKING);
2027 ret = onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK);
2028 onenand_release_device(mtd);
2034 * onenand_check_lock_status - [OneNAND Interface] Check lock status
2035 * @param this onenand chip data structure
2039 static int onenand_check_lock_status(struct onenand_chip *this)
2041 unsigned int value, block, status;
2044 end = this->chipsize >> this->erase_shift;
2045 for (block = 0; block < end; block++) {
2046 /* Set block address */
2047 value = onenand_block_address(this, block);
2048 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
2049 /* Select DataRAM for DDP */
2050 value = onenand_bufferram_address(this, block);
2051 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
2052 /* Set start block address */
2053 this->write_word(block, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
2055 /* Check lock status */
2056 status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
2057 if (!(status & ONENAND_WP_US)) {
2058 printk(KERN_ERR "block = %d, wp status = 0x%x\n", block, status);
2067 * onenand_unlock_all - [OneNAND Interface] unlock all blocks
2068 * @param mtd MTD device structure
2072 static void onenand_unlock_all(struct mtd_info *mtd)
2074 struct onenand_chip *this = mtd->priv;
2076 size_t len = mtd->size;
2078 if (this->options & ONENAND_HAS_UNLOCK_ALL) {
2079 /* Set start block address */
2080 this->write_word(0, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
2081 /* Write unlock command */
2082 this->command(mtd, ONENAND_CMD_UNLOCK_ALL, 0, 0);
2084 /* There's no return value */
2085 this->wait(mtd, FL_LOCKING);
2088 while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
2089 & ONENAND_CTRL_ONGO)
2092 /* Check lock status */
2093 if (onenand_check_lock_status(this))
2096 /* Workaround for all block unlock in DDP */
2097 if (ONENAND_IS_DDP(this) && !FLEXONENAND(this)) {
2098 /* All blocks on another chip */
2099 ofs = this->chipsize >> 1;
2100 len = this->chipsize >> 1;
2104 onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK);
2109 * onenand_check_features - Check and set OneNAND features
2110 * @param mtd MTD data structure
2112 * Check and set OneNAND features
2116 static void onenand_check_features(struct mtd_info *mtd)
2118 struct onenand_chip *this = mtd->priv;
2119 unsigned int density, process;
2121 /* Lock scheme depends on density and process */
2122 density = onenand_get_density(this->device_id);
2123 process = this->version_id >> ONENAND_VERSION_PROCESS_SHIFT;
2127 case ONENAND_DEVICE_DENSITY_4Gb:
2128 if (ONENAND_IS_DDP(this))
2129 this->options |= ONENAND_HAS_2PLANE;
2131 this->options |= ONENAND_HAS_4KB_PAGE;
2133 case ONENAND_DEVICE_DENSITY_2Gb:
2134 /* 2Gb DDP don't have 2 plane */
2135 if (!ONENAND_IS_DDP(this))
2136 this->options |= ONENAND_HAS_2PLANE;
2137 this->options |= ONENAND_HAS_UNLOCK_ALL;
2139 case ONENAND_DEVICE_DENSITY_1Gb:
2140 /* A-Die has all block unlock */
2142 this->options |= ONENAND_HAS_UNLOCK_ALL;
2146 /* Some OneNAND has continuous lock scheme */
2148 this->options |= ONENAND_HAS_CONT_LOCK;
2152 if (ONENAND_IS_MLC(this))
2153 this->options |= ONENAND_HAS_4KB_PAGE;
2155 if (ONENAND_IS_4KB_PAGE(this))
2156 this->options &= ~ONENAND_HAS_2PLANE;
2158 if (FLEXONENAND(this)) {
2159 this->options &= ~ONENAND_HAS_CONT_LOCK;
2160 this->options |= ONENAND_HAS_UNLOCK_ALL;
2163 if (this->options & ONENAND_HAS_CONT_LOCK)
2164 printk(KERN_DEBUG "Lock scheme is Continuous Lock\n");
2165 if (this->options & ONENAND_HAS_UNLOCK_ALL)
2166 printk(KERN_DEBUG "Chip support all block unlock\n");
2167 if (this->options & ONENAND_HAS_2PLANE)
2168 printk(KERN_DEBUG "Chip has 2 plane\n");
2169 if (this->options & ONENAND_HAS_4KB_PAGE)
2170 printk(KERN_DEBUG "Chip has 4KiB pagesize\n");
2175 * onenand_print_device_info - Print device ID
2176 * @param device device ID
2180 char *onenand_print_device_info(int device, int version)
2182 int vcc, demuxed, ddp, density, flexonenand;
2183 char *dev_info = malloc(80);
2186 vcc = device & ONENAND_DEVICE_VCC_MASK;
2187 demuxed = device & ONENAND_DEVICE_IS_DEMUX;
2188 ddp = device & ONENAND_DEVICE_IS_DDP;
2189 density = onenand_get_density(device);
2190 flexonenand = device & DEVICE_IS_FLEXONENAND;
2191 p += sprintf(dev_info, "%s%sOneNAND%s %dMB %sV 16-bit (0x%02x)",
2192 demuxed ? "" : "Muxed ",
2193 flexonenand ? "Flex-" : "",
2195 (16 << density), vcc ? "2.65/3.3" : "1.8", device);
2197 sprintf(p, "\nOneNAND version = 0x%04x", version);
2198 printk("%s\n", dev_info);
2203 static const struct onenand_manufacturers onenand_manuf_ids[] = {
2204 {ONENAND_MFR_NUMONYX, "Numonyx"},
2205 {ONENAND_MFR_SAMSUNG, "Samsung"},
2209 * onenand_check_maf - Check manufacturer ID
2210 * @param manuf manufacturer ID
2212 * Check manufacturer ID
2214 static int onenand_check_maf(int manuf)
2216 int size = ARRAY_SIZE(onenand_manuf_ids);
2218 #ifdef ONENAND_DEBUG
2222 for (i = 0; i < size; i++)
2223 if (manuf == onenand_manuf_ids[i].id)
2226 #ifdef ONENAND_DEBUG
2228 name = onenand_manuf_ids[i].name;
2232 printk(KERN_DEBUG "OneNAND Manufacturer: %s (0x%0x)\n", name, manuf);
2239 * flexonenand_get_boundary - Reads the SLC boundary
2240 * @param onenand_info - onenand info structure
2242 * Fill up boundary[] field in onenand_chip
2244 static int flexonenand_get_boundary(struct mtd_info *mtd)
2246 struct onenand_chip *this = mtd->priv;
2247 unsigned int die, bdry;
2251 syscfg = this->read_word(this->base + ONENAND_REG_SYS_CFG1);
2252 this->write_word((syscfg | 0x0100), this->base + ONENAND_REG_SYS_CFG1);
2254 for (die = 0; die < this->dies; die++) {
2255 this->command(mtd, FLEXONENAND_CMD_PI_ACCESS, die, 0);
2256 this->wait(mtd, FL_SYNCING);
2258 this->command(mtd, FLEXONENAND_CMD_READ_PI, die, 0);
2259 this->wait(mtd, FL_READING);
2261 bdry = this->read_word(this->base + ONENAND_DATARAM);
2262 if ((bdry >> FLEXONENAND_PI_UNLOCK_SHIFT) == 3)
2266 this->boundary[die] = bdry & FLEXONENAND_PI_MASK;
2268 this->command(mtd, ONENAND_CMD_RESET, 0, 0);
2269 this->wait(mtd, FL_RESETING);
2271 printk(KERN_INFO "Die %d boundary: %d%s\n", die,
2272 this->boundary[die], locked ? "(Locked)" : "(Unlocked)");
2276 this->write_word(syscfg, this->base + ONENAND_REG_SYS_CFG1);
2281 * flexonenand_get_size - Fill up fields in onenand_chip and mtd_info
2282 * boundary[], diesize[], mtd->size, mtd->erasesize,
2284 * @param mtd - MTD device structure
2286 static void flexonenand_get_size(struct mtd_info *mtd)
2288 struct onenand_chip *this = mtd->priv;
2289 int die, i, eraseshift, density;
2290 int blksperdie, maxbdry;
2293 density = onenand_get_density(this->device_id);
2294 blksperdie = ((loff_t)(16 << density) << 20) >> (this->erase_shift);
2295 blksperdie >>= ONENAND_IS_DDP(this) ? 1 : 0;
2296 maxbdry = blksperdie - 1;
2297 eraseshift = this->erase_shift - 1;
2299 mtd->numeraseregions = this->dies << 1;
2301 /* This fills up the device boundary */
2302 flexonenand_get_boundary(mtd);
2306 for (; die < this->dies; die++) {
2307 if (!die || this->boundary[die-1] != maxbdry) {
2309 mtd->eraseregions[i].offset = ofs;
2310 mtd->eraseregions[i].erasesize = 1 << eraseshift;
2311 mtd->eraseregions[i].numblocks =
2312 this->boundary[die] + 1;
2313 ofs += mtd->eraseregions[i].numblocks << eraseshift;
2316 mtd->numeraseregions -= 1;
2317 mtd->eraseregions[i].numblocks +=
2318 this->boundary[die] + 1;
2319 ofs += (this->boundary[die] + 1) << (eraseshift - 1);
2321 if (this->boundary[die] != maxbdry) {
2323 mtd->eraseregions[i].offset = ofs;
2324 mtd->eraseregions[i].erasesize = 1 << eraseshift;
2325 mtd->eraseregions[i].numblocks = maxbdry ^
2326 this->boundary[die];
2327 ofs += mtd->eraseregions[i].numblocks << eraseshift;
2330 mtd->numeraseregions -= 1;
2333 /* Expose MLC erase size except when all blocks are SLC */
2334 mtd->erasesize = 1 << this->erase_shift;
2335 if (mtd->numeraseregions == 1)
2336 mtd->erasesize >>= 1;
2338 printk(KERN_INFO "Device has %d eraseregions\n", mtd->numeraseregions);
2339 for (i = 0; i < mtd->numeraseregions; i++)
2340 printk(KERN_INFO "[offset: 0x%08llx, erasesize: 0x%05x,"
2341 " numblocks: %04u]\n", mtd->eraseregions[i].offset,
2342 mtd->eraseregions[i].erasesize,
2343 mtd->eraseregions[i].numblocks);
2345 for (die = 0, mtd->size = 0; die < this->dies; die++) {
2346 this->diesize[die] = (loff_t) (blksperdie << this->erase_shift);
2347 this->diesize[die] -= (loff_t) (this->boundary[die] + 1)
2348 << (this->erase_shift - 1);
2349 mtd->size += this->diesize[die];
2354 * flexonenand_check_blocks_erased - Check if blocks are erased
2355 * @param mtd_info - mtd info structure
2356 * @param start - first erase block to check
2357 * @param end - last erase block to check
2359 * Converting an unerased block from MLC to SLC
2360 * causes byte values to change. Since both data and its ECC
2361 * have changed, reads on the block give uncorrectable error.
2362 * This might lead to the block being detected as bad.
2364 * Avoid this by ensuring that the block to be converted is
2367 static int flexonenand_check_blocks_erased(struct mtd_info *mtd,
2370 struct onenand_chip *this = mtd->priv;
2373 struct mtd_oob_ops ops = {
2374 .mode = MTD_OPS_PLACE_OOB,
2376 .ooblen = mtd->oobsize,
2378 .oobbuf = this->oob_buf,
2382 printk(KERN_DEBUG "Check blocks from %d to %d\n", start, end);
2384 for (block = start; block <= end; block++) {
2385 addr = flexonenand_addr(this, block);
2386 if (onenand_block_isbad_nolock(mtd, addr, 0))
2390 * Since main area write results in ECC write to spare,
2391 * it is sufficient to check only ECC bytes for change.
2393 ret = onenand_read_oob_nolock(mtd, addr, &ops);
2397 for (i = 0; i < mtd->oobsize; i++)
2398 if (this->oob_buf[i] != 0xff)
2401 if (i != mtd->oobsize) {
2402 printk(KERN_WARNING "Block %d not erased.\n", block);
2411 * flexonenand_set_boundary - Writes the SLC boundary
2412 * @param mtd - mtd info structure
2414 int flexonenand_set_boundary(struct mtd_info *mtd, int die,
2415 int boundary, int lock)
2417 struct onenand_chip *this = mtd->priv;
2418 int ret, density, blksperdie, old, new, thisboundary;
2421 if (die >= this->dies)
2424 if (boundary == this->boundary[die])
2427 density = onenand_get_density(this->device_id);
2428 blksperdie = ((16 << density) << 20) >> this->erase_shift;
2429 blksperdie >>= ONENAND_IS_DDP(this) ? 1 : 0;
2431 if (boundary >= blksperdie) {
2432 printk("flexonenand_set_boundary:"
2433 "Invalid boundary value. "
2434 "Boundary not changed.\n");
2438 /* Check if converting blocks are erased */
2439 old = this->boundary[die] + (die * this->density_mask);
2440 new = boundary + (die * this->density_mask);
2441 ret = flexonenand_check_blocks_erased(mtd, min(old, new)
2442 + 1, max(old, new));
2444 printk(KERN_ERR "flexonenand_set_boundary: Please erase blocks before boundary change\n");
2448 this->command(mtd, FLEXONENAND_CMD_PI_ACCESS, die, 0);
2449 this->wait(mtd, FL_SYNCING);
2451 /* Check is boundary is locked */
2452 this->command(mtd, FLEXONENAND_CMD_READ_PI, die, 0);
2453 ret = this->wait(mtd, FL_READING);
2455 thisboundary = this->read_word(this->base + ONENAND_DATARAM);
2456 if ((thisboundary >> FLEXONENAND_PI_UNLOCK_SHIFT) != 3) {
2457 printk(KERN_ERR "flexonenand_set_boundary: boundary locked\n");
2461 printk(KERN_INFO "flexonenand_set_boundary: Changing die %d boundary: %d%s\n",
2462 die, boundary, lock ? "(Locked)" : "(Unlocked)");
2464 boundary &= FLEXONENAND_PI_MASK;
2465 boundary |= lock ? 0 : (3 << FLEXONENAND_PI_UNLOCK_SHIFT);
2467 addr = die ? this->diesize[0] : 0;
2468 this->command(mtd, ONENAND_CMD_ERASE, addr, 0);
2469 ret = this->wait(mtd, FL_ERASING);
2471 printk("flexonenand_set_boundary:"
2472 "Failed PI erase for Die %d\n", die);
2476 this->write_word(boundary, this->base + ONENAND_DATARAM);
2477 this->command(mtd, ONENAND_CMD_PROG, addr, 0);
2478 ret = this->wait(mtd, FL_WRITING);
2480 printk("flexonenand_set_boundary:"
2481 "Failed PI write for Die %d\n", die);
2485 this->command(mtd, FLEXONENAND_CMD_PI_UPDATE, die, 0);
2486 ret = this->wait(mtd, FL_WRITING);
2488 this->write_word(ONENAND_CMD_RESET, this->base + ONENAND_REG_COMMAND);
2489 this->wait(mtd, FL_RESETING);
2491 /* Recalculate device size on boundary change*/
2492 flexonenand_get_size(mtd);
2498 * onenand_chip_probe - [OneNAND Interface] Probe the OneNAND chip
2499 * @param mtd MTD device structure
2501 * OneNAND detection method:
2502 * Compare the the values from command with ones from register
2504 static int onenand_chip_probe(struct mtd_info *mtd)
2506 struct onenand_chip *this = mtd->priv;
2507 int bram_maf_id, bram_dev_id, maf_id, dev_id;
2510 /* Save system configuration 1 */
2511 syscfg = this->read_word(this->base + ONENAND_REG_SYS_CFG1);
2513 /* Clear Sync. Burst Read mode to read BootRAM */
2514 this->write_word((syscfg & ~ONENAND_SYS_CFG1_SYNC_READ),
2515 this->base + ONENAND_REG_SYS_CFG1);
2517 /* Send the command for reading device ID from BootRAM */
2518 this->write_word(ONENAND_CMD_READID, this->base + ONENAND_BOOTRAM);
2520 /* Read manufacturer and device IDs from BootRAM */
2521 bram_maf_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x0);
2522 bram_dev_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x2);
2524 /* Reset OneNAND to read default register values */
2525 this->write_word(ONENAND_CMD_RESET, this->base + ONENAND_BOOTRAM);
2528 this->wait(mtd, FL_RESETING);
2530 /* Restore system configuration 1 */
2531 this->write_word(syscfg, this->base + ONENAND_REG_SYS_CFG1);
2533 /* Check manufacturer ID */
2534 if (onenand_check_maf(bram_maf_id))
2537 /* Read manufacturer and device IDs from Register */
2538 maf_id = this->read_word(this->base + ONENAND_REG_MANUFACTURER_ID);
2539 dev_id = this->read_word(this->base + ONENAND_REG_DEVICE_ID);
2541 /* Check OneNAND device */
2542 if (maf_id != bram_maf_id || dev_id != bram_dev_id)
2549 * onenand_probe - [OneNAND Interface] Probe the OneNAND device
2550 * @param mtd MTD device structure
2552 * OneNAND detection method:
2553 * Compare the the values from command with ones from register
2555 int onenand_probe(struct mtd_info *mtd)
2557 struct onenand_chip *this = mtd->priv;
2562 ret = this->chip_probe(mtd);
2566 /* Read device IDs from Register */
2567 dev_id = this->read_word(this->base + ONENAND_REG_DEVICE_ID);
2568 ver_id = this->read_word(this->base + ONENAND_REG_VERSION_ID);
2569 this->technology = this->read_word(this->base + ONENAND_REG_TECHNOLOGY);
2571 /* Flash device information */
2572 mtd->name = onenand_print_device_info(dev_id, ver_id);
2573 this->device_id = dev_id;
2574 this->version_id = ver_id;
2576 /* Check OneNAND features */
2577 onenand_check_features(mtd);
2579 density = onenand_get_density(dev_id);
2580 if (FLEXONENAND(this)) {
2581 this->dies = ONENAND_IS_DDP(this) ? 2 : 1;
2582 /* Maximum possible erase regions */
2583 mtd->numeraseregions = this->dies << 1;
2584 mtd->eraseregions = malloc(sizeof(struct mtd_erase_region_info)
2585 * (this->dies << 1));
2586 if (!mtd->eraseregions)
2591 * For Flex-OneNAND, chipsize represents maximum possible device size.
2592 * mtd->size represents the actual device size.
2594 this->chipsize = (16 << density) << 20;
2596 /* OneNAND page size & block size */
2597 /* The data buffer size is equal to page size */
2599 this->read_word(this->base + ONENAND_REG_DATA_BUFFER_SIZE);
2600 /* We use the full BufferRAM */
2601 if (ONENAND_IS_4KB_PAGE(this))
2602 mtd->writesize <<= 1;
2604 mtd->oobsize = mtd->writesize >> 5;
2605 /* Pagers per block is always 64 in OneNAND */
2606 mtd->erasesize = mtd->writesize << 6;
2608 * Flex-OneNAND SLC area has 64 pages per block.
2609 * Flex-OneNAND MLC area has 128 pages per block.
2610 * Expose MLC erase size to find erase_shift and page_mask.
2612 if (FLEXONENAND(this))
2613 mtd->erasesize <<= 1;
2615 this->erase_shift = ffs(mtd->erasesize) - 1;
2616 this->page_shift = ffs(mtd->writesize) - 1;
2617 this->ppb_shift = (this->erase_shift - this->page_shift);
2618 this->page_mask = (mtd->erasesize / mtd->writesize) - 1;
2619 /* Set density mask. it is used for DDP */
2620 if (ONENAND_IS_DDP(this))
2621 this->density_mask = this->chipsize >> (this->erase_shift + 1);
2622 /* It's real page size */
2623 this->writesize = mtd->writesize;
2625 /* REVIST: Multichip handling */
2627 if (FLEXONENAND(this))
2628 flexonenand_get_size(mtd);
2630 mtd->size = this->chipsize;
2632 mtd->flags = MTD_CAP_NANDFLASH;
2633 mtd->_erase = onenand_erase;
2634 mtd->_read = onenand_read;
2635 mtd->_write = onenand_write;
2636 mtd->_read_oob = onenand_read_oob;
2637 mtd->_write_oob = onenand_write_oob;
2638 mtd->_sync = onenand_sync;
2639 mtd->_block_isbad = onenand_block_isbad;
2640 mtd->_block_markbad = onenand_block_markbad;
2646 * onenand_scan - [OneNAND Interface] Scan for the OneNAND device
2647 * @param mtd MTD device structure
2648 * @param maxchips Number of chips to scan for
2650 * This fills out all the not initialized function pointers
2651 * with the defaults.
2652 * The flash ID is read and the mtd/chip structures are
2653 * filled with the appropriate values.
2655 int onenand_scan(struct mtd_info *mtd, int maxchips)
2658 struct onenand_chip *this = mtd->priv;
2660 if (!this->read_word)
2661 this->read_word = onenand_readw;
2662 if (!this->write_word)
2663 this->write_word = onenand_writew;
2666 this->command = onenand_command;
2668 this->wait = onenand_wait;
2669 if (!this->bbt_wait)
2670 this->bbt_wait = onenand_bbt_wait;
2672 if (!this->read_bufferram)
2673 this->read_bufferram = onenand_read_bufferram;
2674 if (!this->write_bufferram)
2675 this->write_bufferram = onenand_write_bufferram;
2677 if (!this->chip_probe)
2678 this->chip_probe = onenand_chip_probe;
2680 if (!this->block_markbad)
2681 this->block_markbad = onenand_default_block_markbad;
2682 if (!this->scan_bbt)
2683 this->scan_bbt = onenand_default_bbt;
2685 if (onenand_probe(mtd))
2688 /* Set Sync. Burst Read after probing */
2689 if (this->mmcontrol) {
2690 printk(KERN_INFO "OneNAND Sync. Burst Read support\n");
2691 this->read_bufferram = onenand_sync_read_bufferram;
2694 /* Allocate buffers, if necessary */
2695 if (!this->page_buf) {
2696 this->page_buf = kzalloc(mtd->writesize, GFP_KERNEL);
2697 if (!this->page_buf) {
2698 printk(KERN_ERR "onenand_scan(): Can't allocate page_buf\n");
2701 this->options |= ONENAND_PAGEBUF_ALLOC;
2703 if (!this->oob_buf) {
2704 this->oob_buf = kzalloc(mtd->oobsize, GFP_KERNEL);
2705 if (!this->oob_buf) {
2706 printk(KERN_ERR "onenand_scan: Can't allocate oob_buf\n");
2707 if (this->options & ONENAND_PAGEBUF_ALLOC) {
2708 this->options &= ~ONENAND_PAGEBUF_ALLOC;
2709 kfree(this->page_buf);
2713 this->options |= ONENAND_OOBBUF_ALLOC;
2716 this->state = FL_READY;
2719 * Allow subpage writes up to oobsize.
2721 switch (mtd->oobsize) {
2723 this->ecclayout = &onenand_oob_128;
2724 mtd->subpage_sft = 0;
2728 this->ecclayout = &onenand_oob_64;
2729 mtd->subpage_sft = 2;
2733 this->ecclayout = &onenand_oob_32;
2734 mtd->subpage_sft = 1;
2738 printk(KERN_WARNING "No OOB scheme defined for oobsize %d\n",
2740 mtd->subpage_sft = 0;
2741 /* To prevent kernel oops */
2742 this->ecclayout = &onenand_oob_32;
2746 this->subpagesize = mtd->writesize >> mtd->subpage_sft;
2749 * The number of bytes available for a client to place data into
2750 * the out of band area
2752 this->ecclayout->oobavail = 0;
2753 for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES &&
2754 this->ecclayout->oobfree[i].length; i++)
2755 this->ecclayout->oobavail +=
2756 this->ecclayout->oobfree[i].length;
2757 mtd->oobavail = this->ecclayout->oobavail;
2759 mtd->ecclayout = this->ecclayout;
2761 /* Unlock whole block */
2762 onenand_unlock_all(mtd);
2764 return this->scan_bbt(mtd);
2768 * onenand_release - [OneNAND Interface] Free resources held by the OneNAND device
2769 * @param mtd MTD device structure
2771 void onenand_release(struct mtd_info *mtd)