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 #ifdef CONFIG_S3C64XX
639 if (ONENAND_IS_2PLANE(this))
640 blockpage = onenand_get_2x_blockpage(mtd, addr);
642 blockpage = (int) (addr >> this->page_shift);
644 /* Is there valid data? */
645 i = ONENAND_CURRENT_BUFFERRAM(this);
646 if (this->bufferram[i].blockpage == blockpage)
649 /* Check another BufferRAM */
650 i = ONENAND_NEXT_BUFFERRAM(this);
651 if (this->bufferram[i].blockpage == blockpage) {
652 ONENAND_SET_NEXT_BUFFERRAM(this);
657 if (found && ONENAND_IS_DDP(this)) {
658 /* Select DataRAM for DDP */
659 int block = onenand_block(this, addr);
660 int value = onenand_bufferram_address(this, block);
661 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
668 * onenand_update_bufferram - [GENERIC] Update BufferRAM information
669 * @param mtd MTD data structure
670 * @param addr address to update
671 * @param valid valid flag
673 * Update BufferRAM information
675 static int onenand_update_bufferram(struct mtd_info *mtd, loff_t addr,
678 struct onenand_chip *this = mtd->priv;
682 if (ONENAND_IS_2PLANE(this))
683 blockpage = onenand_get_2x_blockpage(mtd, addr);
685 blockpage = (int)(addr >> this->page_shift);
687 /* Invalidate another BufferRAM */
688 i = ONENAND_NEXT_BUFFERRAM(this);
689 if (this->bufferram[i].blockpage == blockpage)
690 this->bufferram[i].blockpage = -1;
692 /* Update BufferRAM */
693 i = ONENAND_CURRENT_BUFFERRAM(this);
695 this->bufferram[i].blockpage = blockpage;
697 this->bufferram[i].blockpage = -1;
703 * onenand_invalidate_bufferram - [GENERIC] Invalidate BufferRAM information
704 * @param mtd MTD data structure
705 * @param addr start address to invalidate
706 * @param len length to invalidate
708 * Invalidate BufferRAM information
710 static void onenand_invalidate_bufferram(struct mtd_info *mtd, loff_t addr,
713 struct onenand_chip *this = mtd->priv;
715 loff_t end_addr = addr + len;
717 /* Invalidate BufferRAM */
718 for (i = 0; i < MAX_BUFFERRAM; i++) {
719 loff_t buf_addr = this->bufferram[i].blockpage << this->page_shift;
721 if (buf_addr >= addr && buf_addr < end_addr)
722 this->bufferram[i].blockpage = -1;
727 * onenand_get_device - [GENERIC] Get chip for selected access
728 * @param mtd MTD device structure
729 * @param new_state the state which is requested
731 * Get the device and lock it for exclusive access
733 static void onenand_get_device(struct mtd_info *mtd, int new_state)
739 * onenand_release_device - [GENERIC] release chip
740 * @param mtd MTD device structure
742 * Deselect, release chip lock and wake up anyone waiting on the device
744 static void onenand_release_device(struct mtd_info *mtd)
750 * onenand_transfer_auto_oob - [Internal] oob auto-placement transfer
751 * @param mtd MTD device structure
752 * @param buf destination address
753 * @param column oob offset to read from
754 * @param thislen oob length to read
756 static int onenand_transfer_auto_oob(struct mtd_info *mtd, uint8_t *buf,
757 int column, int thislen)
759 struct onenand_chip *this = mtd->priv;
760 struct nand_oobfree *free;
761 int readcol = column;
762 int readend = column + thislen;
765 uint8_t *oob_buf = this->oob_buf;
767 free = this->ecclayout->oobfree;
768 for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
769 if (readcol >= lastgap)
770 readcol += free->offset - lastgap;
771 if (readend >= lastgap)
772 readend += free->offset - lastgap;
773 lastgap = free->offset + free->length;
775 this->read_bufferram(mtd, 0, ONENAND_SPARERAM, oob_buf, 0, mtd->oobsize);
776 free = this->ecclayout->oobfree;
777 for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
778 int free_end = free->offset + free->length;
779 if (free->offset < readend && free_end > readcol) {
780 int st = max_t(int,free->offset,readcol);
781 int ed = min_t(int,free_end,readend);
783 memcpy(buf, oob_buf + st, n);
785 } else if (column == 0)
792 * onenand_recover_lsb - [Flex-OneNAND] Recover LSB page data
793 * @param mtd MTD device structure
794 * @param addr address to recover
795 * @param status return value from onenand_wait
797 * MLC NAND Flash cell has paired pages - LSB page and MSB page. LSB page has
798 * lower page address and MSB page has higher page address in paired pages.
799 * If power off occurs during MSB page program, the paired LSB page data can
800 * become corrupt. LSB page recovery read is a way to read LSB page though page
801 * data are corrupted. When uncorrectable error occurs as a result of LSB page
802 * read after power up, issue LSB page recovery read.
804 static int onenand_recover_lsb(struct mtd_info *mtd, loff_t addr, int status)
806 struct onenand_chip *this = mtd->priv;
809 /* Recovery is only for Flex-OneNAND */
810 if (!FLEXONENAND(this))
813 /* check if we failed due to uncorrectable error */
814 if (status != -EBADMSG && status != ONENAND_BBT_READ_ECC_ERROR)
817 /* check if address lies in MLC region */
818 i = flexonenand_region(mtd, addr);
819 if (mtd->eraseregions[i].erasesize < (1 << this->erase_shift))
822 printk("onenand_recover_lsb:"
823 "Attempting to recover from uncorrectable read\n");
825 /* Issue the LSB page recovery command */
826 this->command(mtd, FLEXONENAND_CMD_RECOVER_LSB, addr, this->writesize);
827 return this->wait(mtd, FL_READING);
831 * onenand_read_ops_nolock - [OneNAND Interface] OneNAND read main and/or out-of-band
832 * @param mtd MTD device structure
833 * @param from offset to read from
834 * @param ops oob operation description structure
836 * OneNAND read main and/or out-of-band data
838 static int onenand_read_ops_nolock(struct mtd_info *mtd, loff_t from,
839 struct mtd_oob_ops *ops)
841 struct onenand_chip *this = mtd->priv;
842 struct mtd_ecc_stats stats;
843 size_t len = ops->len;
844 size_t ooblen = ops->ooblen;
845 u_char *buf = ops->datbuf;
846 u_char *oobbuf = ops->oobbuf;
847 int read = 0, column, thislen;
848 int oobread = 0, oobcolumn, thisooblen, oobsize;
849 int ret = 0, boundary = 0;
850 int writesize = this->writesize;
852 MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_read_ops_nolock: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
854 if (ops->mode == MTD_OOB_AUTO)
855 oobsize = this->ecclayout->oobavail;
857 oobsize = mtd->oobsize;
859 oobcolumn = from & (mtd->oobsize - 1);
861 /* Do not allow reads past end of device */
862 if ((from + len) > mtd->size) {
863 printk(KERN_ERR "onenand_read_ops_nolock: Attempt read beyond end of device\n");
869 stats = mtd->ecc_stats;
871 /* Read-while-load method */
872 /* Note: We can't use this feature in MLC */
874 /* Do first load to bufferRAM */
876 if (!onenand_check_bufferram(mtd, from)) {
877 this->main_buf = buf;
878 this->command(mtd, ONENAND_CMD_READ, from, writesize);
879 ret = this->wait(mtd, FL_READING);
881 ret = onenand_recover_lsb(mtd, from, ret);
882 onenand_update_bufferram(mtd, from, !ret);
888 thislen = min_t(int, writesize, len - read);
889 column = from & (writesize - 1);
890 if (column + thislen > writesize)
891 thislen = writesize - column;
894 /* If there is more to load then start next load */
896 if (!ONENAND_IS_4KB_PAGE(this) && read + thislen < len) {
897 this->main_buf = buf + thislen;
898 this->command(mtd, ONENAND_CMD_READ, from, writesize);
900 * Chip boundary handling in DDP
901 * Now we issued chip 1 read and pointed chip 1
902 * bufferam so we have to point chip 0 bufferam.
904 if (ONENAND_IS_DDP(this) &&
905 unlikely(from == (this->chipsize >> 1))) {
906 this->write_word(ONENAND_DDP_CHIP0, this->base + ONENAND_REG_START_ADDRESS2);
910 ONENAND_SET_PREV_BUFFERRAM(this);
913 /* While load is going, read from last bufferRAM */
914 this->read_bufferram(mtd, from - thislen, ONENAND_DATARAM, buf, column, thislen);
916 /* Read oob area if needed */
918 thisooblen = oobsize - oobcolumn;
919 thisooblen = min_t(int, thisooblen, ooblen - oobread);
921 if (ops->mode == MTD_OOB_AUTO)
922 onenand_transfer_auto_oob(mtd, oobbuf, oobcolumn, thisooblen);
924 this->read_bufferram(mtd, 0, ONENAND_SPARERAM, oobbuf, oobcolumn, thisooblen);
925 oobread += thisooblen;
926 oobbuf += thisooblen;
930 if (ONENAND_IS_4KB_PAGE(this) && (read + thislen < len)) {
931 this->command(mtd, ONENAND_CMD_READ, from, writesize);
932 ret = this->wait(mtd, FL_READING);
934 ret = onenand_recover_lsb(mtd, from, ret);
935 onenand_update_bufferram(mtd, from, !ret);
940 /* See if we are done */
944 /* Set up for next read from bufferRAM */
945 if (unlikely(boundary))
946 this->write_word(ONENAND_DDP_CHIP1, this->base + ONENAND_REG_START_ADDRESS2);
947 if (!ONENAND_IS_4KB_PAGE(this))
948 ONENAND_SET_NEXT_BUFFERRAM(this);
950 thislen = min_t(int, writesize, len - read);
953 if (!ONENAND_IS_4KB_PAGE(this)) {
954 /* Now wait for load */
955 ret = this->wait(mtd, FL_READING);
956 onenand_update_bufferram(mtd, from, !ret);
963 * Return success, if no ECC failures, else -EBADMSG
964 * fs driver will take care of that, because
965 * retlen == desired len and result == -EBADMSG
968 ops->oobretlen = oobread;
973 if (mtd->ecc_stats.failed - stats.failed)
976 return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0;
980 * onenand_read_oob_nolock - [MTD Interface] OneNAND read out-of-band
981 * @param mtd MTD device structure
982 * @param from offset to read from
983 * @param ops oob operation description structure
985 * OneNAND read out-of-band data from the spare area
987 static int onenand_read_oob_nolock(struct mtd_info *mtd, loff_t from,
988 struct mtd_oob_ops *ops)
990 struct onenand_chip *this = mtd->priv;
991 struct mtd_ecc_stats stats;
992 int read = 0, thislen, column, oobsize;
993 size_t len = ops->ooblen;
994 mtd_oob_mode_t mode = ops->mode;
995 u_char *buf = ops->oobbuf;
996 int ret = 0, readcmd;
998 from += ops->ooboffs;
1000 MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_read_oob_nolock: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
1002 /* Initialize return length value */
1005 if (mode == MTD_OOB_AUTO)
1006 oobsize = this->ecclayout->oobavail;
1008 oobsize = mtd->oobsize;
1010 column = from & (mtd->oobsize - 1);
1012 if (unlikely(column >= oobsize)) {
1013 printk(KERN_ERR "onenand_read_oob_nolock: Attempted to start read outside oob\n");
1017 /* Do not allow reads past end of device */
1018 if (unlikely(from >= mtd->size ||
1019 column + len > ((mtd->size >> this->page_shift) -
1020 (from >> this->page_shift)) * oobsize)) {
1021 printk(KERN_ERR "onenand_read_oob_nolock: Attempted to read beyond end of device\n");
1025 stats = mtd->ecc_stats;
1027 readcmd = ONENAND_IS_4KB_PAGE(this) ?
1028 ONENAND_CMD_READ : ONENAND_CMD_READOOB;
1030 while (read < len) {
1031 thislen = oobsize - column;
1032 thislen = min_t(int, thislen, len);
1034 this->spare_buf = buf;
1035 this->command(mtd, readcmd, from, mtd->oobsize);
1037 onenand_update_bufferram(mtd, from, 0);
1039 ret = this->wait(mtd, FL_READING);
1041 ret = onenand_recover_lsb(mtd, from, ret);
1043 if (ret && ret != -EBADMSG) {
1044 printk(KERN_ERR "onenand_read_oob_nolock: read failed = 0x%x\n", ret);
1048 if (mode == MTD_OOB_AUTO)
1049 onenand_transfer_auto_oob(mtd, buf, column, thislen);
1051 this->read_bufferram(mtd, 0, ONENAND_SPARERAM, buf, column, thislen);
1063 from += mtd->writesize;
1068 ops->oobretlen = read;
1073 if (mtd->ecc_stats.failed - stats.failed)
1080 * onenand_read - [MTD Interface] MTD compability function for onenand_read_ecc
1081 * @param mtd MTD device structure
1082 * @param from offset to read from
1083 * @param len number of bytes to read
1084 * @param retlen pointer to variable to store the number of read bytes
1085 * @param buf the databuffer to put data
1087 * This function simply calls onenand_read_ecc with oob buffer and oobsel = NULL
1089 int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
1090 size_t * retlen, u_char * buf)
1092 struct mtd_oob_ops ops = {
1100 onenand_get_device(mtd, FL_READING);
1101 ret = onenand_read_ops_nolock(mtd, from, &ops);
1102 onenand_release_device(mtd);
1104 *retlen = ops.retlen;
1109 * onenand_read_oob - [MTD Interface] OneNAND read out-of-band
1110 * @param mtd MTD device structure
1111 * @param from offset to read from
1112 * @param ops oob operations description structure
1114 * OneNAND main and/or out-of-band
1116 int onenand_read_oob(struct mtd_info *mtd, loff_t from,
1117 struct mtd_oob_ops *ops)
1121 switch (ops->mode) {
1126 /* Not implemented yet */
1131 onenand_get_device(mtd, FL_READING);
1133 ret = onenand_read_ops_nolock(mtd, from, ops);
1135 ret = onenand_read_oob_nolock(mtd, from, ops);
1136 onenand_release_device(mtd);
1142 * onenand_bbt_wait - [DEFAULT] wait until the command is done
1143 * @param mtd MTD device structure
1144 * @param state state to select the max. timeout value
1146 * Wait for command done.
1148 static int onenand_bbt_wait(struct mtd_info *mtd, int state)
1150 struct onenand_chip *this = mtd->priv;
1151 unsigned int flags = ONENAND_INT_MASTER;
1152 unsigned int interrupt;
1156 interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
1157 if (interrupt & flags)
1161 /* To get correct interrupt status in timeout case */
1162 interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
1163 ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS);
1165 if (interrupt & ONENAND_INT_READ) {
1166 int ecc = onenand_read_ecc(this);
1167 if (ecc & ONENAND_ECC_2BIT_ALL) {
1168 printk(KERN_INFO "onenand_bbt_wait: ecc error = 0x%04x"
1169 ", controller = 0x%04x\n", ecc, ctrl);
1170 return ONENAND_BBT_READ_ERROR;
1173 printk(KERN_ERR "onenand_bbt_wait: read timeout!"
1174 "ctrl=0x%04x intr=0x%04x\n", ctrl, interrupt);
1175 return ONENAND_BBT_READ_FATAL_ERROR;
1178 /* Initial bad block case: 0x2400 or 0x0400 */
1179 if (ctrl & ONENAND_CTRL_ERROR) {
1180 printk(KERN_DEBUG "onenand_bbt_wait: controller error = 0x%04x\n", ctrl);
1181 return ONENAND_BBT_READ_ERROR;
1188 * onenand_bbt_read_oob - [MTD Interface] OneNAND read out-of-band for bbt scan
1189 * @param mtd MTD device structure
1190 * @param from offset to read from
1191 * @param ops oob operation description structure
1193 * OneNAND read out-of-band data from the spare area for bbt scan
1195 int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
1196 struct mtd_oob_ops *ops)
1198 struct onenand_chip *this = mtd->priv;
1199 int read = 0, thislen, column;
1200 int ret = 0, readcmd;
1201 size_t len = ops->ooblen;
1202 u_char *buf = ops->oobbuf;
1204 MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_bbt_read_oob: from = 0x%08x, len = %zi\n", (unsigned int) from, len);
1206 readcmd = ONENAND_IS_4KB_PAGE(this) ?
1207 ONENAND_CMD_READ : ONENAND_CMD_READOOB;
1209 /* Initialize return value */
1212 /* Do not allow reads past end of device */
1213 if (unlikely((from + len) > mtd->size)) {
1214 printk(KERN_ERR "onenand_bbt_read_oob: Attempt read beyond end of device\n");
1215 return ONENAND_BBT_READ_FATAL_ERROR;
1218 /* Grab the lock and see if the device is available */
1219 onenand_get_device(mtd, FL_READING);
1221 column = from & (mtd->oobsize - 1);
1223 while (read < len) {
1225 thislen = mtd->oobsize - column;
1226 thislen = min_t(int, thislen, len);
1228 this->spare_buf = buf;
1229 this->command(mtd, readcmd, from, mtd->oobsize);
1231 onenand_update_bufferram(mtd, from, 0);
1233 ret = this->bbt_wait(mtd, FL_READING);
1235 ret = onenand_recover_lsb(mtd, from, ret);
1240 this->read_bufferram(mtd, 0, ONENAND_SPARERAM, buf, column, thislen);
1249 /* Update Page size */
1250 from += this->writesize;
1255 /* Deselect and wake up anyone waiting on the device */
1256 onenand_release_device(mtd);
1258 ops->oobretlen = read;
1263 #ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE
1265 * onenand_verify_oob - [GENERIC] verify the oob contents after a write
1266 * @param mtd MTD device structure
1267 * @param buf the databuffer to verify
1268 * @param to offset to read from
1270 static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to)
1272 struct onenand_chip *this = mtd->priv;
1273 u_char *oob_buf = this->oob_buf;
1274 int status, i, readcmd;
1276 readcmd = ONENAND_IS_4KB_PAGE(this) ?
1277 ONENAND_CMD_READ : ONENAND_CMD_READOOB;
1279 this->command(mtd, readcmd, to, mtd->oobsize);
1280 onenand_update_bufferram(mtd, to, 0);
1281 status = this->wait(mtd, FL_READING);
1285 this->read_bufferram(mtd, 0, ONENAND_SPARERAM, oob_buf, 0, mtd->oobsize);
1286 for (i = 0; i < mtd->oobsize; i++)
1287 if (buf[i] != 0xFF && buf[i] != oob_buf[i])
1294 * onenand_verify - [GENERIC] verify the chip contents after a write
1295 * @param mtd MTD device structure
1296 * @param buf the databuffer to verify
1297 * @param addr offset to read from
1298 * @param len number of bytes to read and compare
1300 static int onenand_verify(struct mtd_info *mtd, const u_char *buf, loff_t addr, size_t len)
1302 struct onenand_chip *this = mtd->priv;
1303 void __iomem *dataram;
1305 int thislen, column;
1308 thislen = min_t(int, this->writesize, len);
1309 column = addr & (this->writesize - 1);
1310 if (column + thislen > this->writesize)
1311 thislen = this->writesize - column;
1313 this->command(mtd, ONENAND_CMD_READ, addr, this->writesize);
1315 onenand_update_bufferram(mtd, addr, 0);
1317 ret = this->wait(mtd, FL_READING);
1321 onenand_update_bufferram(mtd, addr, 1);
1323 dataram = this->base + ONENAND_DATARAM;
1324 dataram += onenand_bufferram_offset(mtd, ONENAND_DATARAM);
1326 if (memcmp(buf, dataram + column, thislen))
1337 #define onenand_verify(...) (0)
1338 #define onenand_verify_oob(...) (0)
1341 #define NOTALIGNED(x) ((x & (this->subpagesize - 1)) != 0)
1344 * onenand_fill_auto_oob - [Internal] oob auto-placement transfer
1345 * @param mtd MTD device structure
1346 * @param oob_buf oob buffer
1347 * @param buf source address
1348 * @param column oob offset to write to
1349 * @param thislen oob length to write
1351 static int onenand_fill_auto_oob(struct mtd_info *mtd, u_char *oob_buf,
1352 const u_char *buf, int column, int thislen)
1354 struct onenand_chip *this = mtd->priv;
1355 struct nand_oobfree *free;
1356 int writecol = column;
1357 int writeend = column + thislen;
1361 free = this->ecclayout->oobfree;
1362 for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
1363 if (writecol >= lastgap)
1364 writecol += free->offset - lastgap;
1365 if (writeend >= lastgap)
1366 writeend += free->offset - lastgap;
1367 lastgap = free->offset + free->length;
1369 free = this->ecclayout->oobfree;
1370 for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free->length; i++, free++) {
1371 int free_end = free->offset + free->length;
1372 if (free->offset < writeend && free_end > writecol) {
1373 int st = max_t(int,free->offset,writecol);
1374 int ed = min_t(int,free_end,writeend);
1376 memcpy(oob_buf + st, buf, n);
1378 } else if (column == 0)
1385 * onenand_write_ops_nolock - [OneNAND Interface] write main and/or out-of-band
1386 * @param mtd MTD device structure
1387 * @param to offset to write to
1388 * @param ops oob operation description structure
1390 * Write main and/or oob with ECC
1392 static int onenand_write_ops_nolock(struct mtd_info *mtd, loff_t to,
1393 struct mtd_oob_ops *ops)
1395 struct onenand_chip *this = mtd->priv;
1396 int written = 0, column, thislen, subpage;
1397 int oobwritten = 0, oobcolumn, thisooblen, oobsize;
1398 size_t len = ops->len;
1399 size_t ooblen = ops->ooblen;
1400 const u_char *buf = ops->datbuf;
1401 const u_char *oob = ops->oobbuf;
1405 MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_write_ops_nolock: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
1407 /* Initialize retlen, in case of early exit */
1411 /* Do not allow writes past end of device */
1412 if (unlikely((to + len) > mtd->size)) {
1413 printk(KERN_ERR "onenand_write_ops_nolock: Attempt write to past end of device\n");
1417 /* Reject writes, which are not page aligned */
1418 if (unlikely(NOTALIGNED(to) || NOTALIGNED(len))) {
1419 printk(KERN_ERR "onenand_write_ops_nolock: Attempt to write not page aligned data\n");
1423 if (ops->mode == MTD_OOB_AUTO)
1424 oobsize = this->ecclayout->oobavail;
1426 oobsize = mtd->oobsize;
1428 oobcolumn = to & (mtd->oobsize - 1);
1430 column = to & (mtd->writesize - 1);
1432 /* Loop until all data write */
1433 while (written < len) {
1434 u_char *wbuf = (u_char *) buf;
1436 thislen = min_t(int, mtd->writesize - column, len - written);
1437 thisooblen = min_t(int, oobsize - oobcolumn, ooblen - oobwritten);
1439 this->command(mtd, ONENAND_CMD_BUFFERRAM, to, thislen);
1441 /* Partial page write */
1442 subpage = thislen < mtd->writesize;
1444 memset(this->page_buf, 0xff, mtd->writesize);
1445 memcpy(this->page_buf + column, buf, thislen);
1446 wbuf = this->page_buf;
1449 this->write_bufferram(mtd, to, ONENAND_DATARAM, wbuf, 0, mtd->writesize);
1452 oobbuf = this->oob_buf;
1454 /* We send data to spare ram with oobsize
1455 * * to prevent byte access */
1456 memset(oobbuf, 0xff, mtd->oobsize);
1457 if (ops->mode == MTD_OOB_AUTO)
1458 onenand_fill_auto_oob(mtd, oobbuf, oob, oobcolumn, thisooblen);
1460 memcpy(oobbuf + oobcolumn, oob, thisooblen);
1462 oobwritten += thisooblen;
1466 oobbuf = (u_char *) ffchars;
1468 this->write_bufferram(mtd, 0, ONENAND_SPARERAM, oobbuf, 0, mtd->oobsize);
1470 this->command(mtd, ONENAND_CMD_PROG, to, mtd->writesize);
1472 ret = this->wait(mtd, FL_WRITING);
1474 /* In partial page write we don't update bufferram */
1475 onenand_update_bufferram(mtd, to, !ret && !subpage);
1476 if (ONENAND_IS_2PLANE(this)) {
1477 ONENAND_SET_BUFFERRAM1(this);
1478 onenand_update_bufferram(mtd, to + this->writesize, !ret && !subpage);
1482 printk(KERN_ERR "onenand_write_ops_nolock: write filaed %d\n", ret);
1486 /* Only check verify write turn on */
1487 ret = onenand_verify(mtd, buf, to, thislen);
1489 printk(KERN_ERR "onenand_write_ops_nolock: verify failed %d\n", ret);
1503 ops->retlen = written;
1509 * onenand_write_oob_nolock - [Internal] OneNAND write out-of-band
1510 * @param mtd MTD device structure
1511 * @param to offset to write to
1512 * @param len number of bytes to write
1513 * @param retlen pointer to variable to store the number of written bytes
1514 * @param buf the data to write
1515 * @param mode operation mode
1517 * OneNAND write out-of-band
1519 static int onenand_write_oob_nolock(struct mtd_info *mtd, loff_t to,
1520 struct mtd_oob_ops *ops)
1522 struct onenand_chip *this = mtd->priv;
1523 int column, ret = 0, oobsize;
1524 int written = 0, oobcmd;
1526 size_t len = ops->ooblen;
1527 const u_char *buf = ops->oobbuf;
1528 mtd_oob_mode_t mode = ops->mode;
1532 MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_write_oob_nolock: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
1534 /* Initialize retlen, in case of early exit */
1537 if (mode == MTD_OOB_AUTO)
1538 oobsize = this->ecclayout->oobavail;
1540 oobsize = mtd->oobsize;
1542 column = to & (mtd->oobsize - 1);
1544 if (unlikely(column >= oobsize)) {
1545 printk(KERN_ERR "onenand_write_oob_nolock: Attempted to start write outside oob\n");
1549 /* For compatibility with NAND: Do not allow write past end of page */
1550 if (unlikely(column + len > oobsize)) {
1551 printk(KERN_ERR "onenand_write_oob_nolock: "
1552 "Attempt to write past end of page\n");
1556 /* Do not allow reads past end of device */
1557 if (unlikely(to >= mtd->size ||
1558 column + len > ((mtd->size >> this->page_shift) -
1559 (to >> this->page_shift)) * oobsize)) {
1560 printk(KERN_ERR "onenand_write_oob_nolock: Attempted to write past end of device\n");
1564 oobbuf = this->oob_buf;
1566 oobcmd = ONENAND_IS_4KB_PAGE(this) ?
1567 ONENAND_CMD_PROG : ONENAND_CMD_PROGOOB;
1569 /* Loop until all data write */
1570 while (written < len) {
1571 int thislen = min_t(int, oobsize, len - written);
1573 this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->oobsize);
1575 /* We send data to spare ram with oobsize
1576 * to prevent byte access */
1577 memset(oobbuf, 0xff, mtd->oobsize);
1578 if (mode == MTD_OOB_AUTO)
1579 onenand_fill_auto_oob(mtd, oobbuf, buf, column, thislen);
1581 memcpy(oobbuf + column, buf, thislen);
1582 this->write_bufferram(mtd, 0, ONENAND_SPARERAM, oobbuf, 0, mtd->oobsize);
1584 if (ONENAND_IS_4KB_PAGE(this)) {
1585 /* Set main area of DataRAM to 0xff*/
1586 memset(this->page_buf, 0xff, mtd->writesize);
1587 this->write_bufferram(mtd, 0, ONENAND_DATARAM,
1588 this->page_buf, 0, mtd->writesize);
1591 this->command(mtd, oobcmd, to, mtd->oobsize);
1593 onenand_update_bufferram(mtd, to, 0);
1594 if (ONENAND_IS_2PLANE(this)) {
1595 ONENAND_SET_BUFFERRAM1(this);
1596 onenand_update_bufferram(mtd, to + this->writesize, 0);
1599 ret = this->wait(mtd, FL_WRITING);
1601 printk(KERN_ERR "onenand_write_oob_nolock: write failed %d\n", ret);
1605 ret = onenand_verify_oob(mtd, oobbuf, to);
1607 printk(KERN_ERR "onenand_write_oob_nolock: verify failed %d\n", ret);
1615 to += mtd->writesize;
1620 ops->oobretlen = written;
1626 * onenand_write - [MTD Interface] compability function for onenand_write_ecc
1627 * @param mtd MTD device structure
1628 * @param to offset to write to
1629 * @param len number of bytes to write
1630 * @param retlen pointer to variable to store the number of written bytes
1631 * @param buf the data to write
1635 int onenand_write(struct mtd_info *mtd, loff_t to, size_t len,
1636 size_t * retlen, const u_char * buf)
1638 struct mtd_oob_ops ops = {
1641 .datbuf = (u_char *) buf,
1646 onenand_get_device(mtd, FL_WRITING);
1647 ret = onenand_write_ops_nolock(mtd, to, &ops);
1648 onenand_release_device(mtd);
1650 *retlen = ops.retlen;
1655 * onenand_write_oob - [MTD Interface] OneNAND write out-of-band
1656 * @param mtd MTD device structure
1657 * @param to offset to write to
1658 * @param ops oob operation description structure
1660 * OneNAND write main and/or out-of-band
1662 int onenand_write_oob(struct mtd_info *mtd, loff_t to,
1663 struct mtd_oob_ops *ops)
1667 switch (ops->mode) {
1672 /* Not implemented yet */
1677 onenand_get_device(mtd, FL_WRITING);
1679 ret = onenand_write_ops_nolock(mtd, to, ops);
1681 ret = onenand_write_oob_nolock(mtd, to, ops);
1682 onenand_release_device(mtd);
1689 * onenand_block_isbad_nolock - [GENERIC] Check if a block is marked bad
1690 * @param mtd MTD device structure
1691 * @param ofs offset from device start
1692 * @param allowbbt 1, if its allowed to access the bbt area
1694 * Check, if the block is bad, Either by reading the bad block table or
1695 * calling of the scan function.
1697 static int onenand_block_isbad_nolock(struct mtd_info *mtd, loff_t ofs, int allowbbt)
1699 struct onenand_chip *this = mtd->priv;
1700 struct bbm_info *bbm = this->bbm;
1702 /* Return info from the table */
1703 return bbm->isbad_bbt(mtd, ofs, allowbbt);
1708 * onenand_erase - [MTD Interface] erase block(s)
1709 * @param mtd MTD device structure
1710 * @param instr erase instruction
1712 * Erase one ore more blocks
1714 int onenand_erase(struct mtd_info *mtd, struct erase_info *instr)
1716 struct onenand_chip *this = mtd->priv;
1717 unsigned int block_size;
1718 loff_t addr = instr->addr;
1719 unsigned int len = instr->len;
1721 struct mtd_erase_region_info *region = NULL;
1722 unsigned int region_end = 0;
1724 MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_erase: start = 0x%08x, len = %i\n",
1725 (unsigned int) addr, len);
1727 /* Do not allow erase past end of device */
1728 if (unlikely((len + addr) > mtd->size)) {
1729 MTDDEBUG(MTD_DEBUG_LEVEL0, "onenand_erase:"
1730 "Erase past end of device\n");
1734 if (FLEXONENAND(this)) {
1735 /* Find the eraseregion of this address */
1736 i = flexonenand_region(mtd, addr);
1737 region = &mtd->eraseregions[i];
1739 block_size = region->erasesize;
1740 region_end = region->offset
1741 + region->erasesize * region->numblocks;
1743 /* Start address within region must align on block boundary.
1744 * Erase region's start offset is always block start address.
1746 if (unlikely((addr - region->offset) & (block_size - 1))) {
1747 MTDDEBUG(MTD_DEBUG_LEVEL0, "onenand_erase:"
1748 " Unaligned address\n");
1752 block_size = 1 << this->erase_shift;
1754 /* Start address must align on block boundary */
1755 if (unlikely(addr & (block_size - 1))) {
1756 MTDDEBUG(MTD_DEBUG_LEVEL0, "onenand_erase:"
1757 "Unaligned address\n");
1762 /* Length must align on block boundary */
1763 if (unlikely(len & (block_size - 1))) {
1764 MTDDEBUG (MTD_DEBUG_LEVEL0,
1765 "onenand_erase: Length not block aligned\n");
1769 instr->fail_addr = 0xffffffff;
1771 /* Grab the lock and see if the device is available */
1772 onenand_get_device(mtd, FL_ERASING);
1774 /* Loop throught the pages */
1775 instr->state = MTD_ERASING;
1779 /* Check if we have a bad block, we do not erase bad blocks */
1780 if (instr->priv == 0 && onenand_block_isbad_nolock(mtd, addr, 0)) {
1781 printk(KERN_WARNING "onenand_erase: attempt to erase"
1782 " a bad block at addr 0x%08x\n",
1783 (unsigned int) addr);
1784 instr->state = MTD_ERASE_FAILED;
1788 this->command(mtd, ONENAND_CMD_ERASE, addr, block_size);
1790 onenand_invalidate_bufferram(mtd, addr, block_size);
1792 ret = this->wait(mtd, FL_ERASING);
1793 /* Check, if it is write protected */
1796 MTDDEBUG (MTD_DEBUG_LEVEL0, "onenand_erase: "
1797 "Device is write protected!!!\n");
1799 MTDDEBUG (MTD_DEBUG_LEVEL0, "onenand_erase: "
1800 "Failed erase, block %d\n",
1801 onenand_block(this, addr));
1802 instr->state = MTD_ERASE_FAILED;
1803 instr->fail_addr = addr;
1811 if (addr == region_end) {
1816 block_size = region->erasesize;
1817 region_end = region->offset
1818 + region->erasesize * region->numblocks;
1820 if (len & (block_size - 1)) {
1821 /* This has been checked at MTD
1822 * partitioning level. */
1823 printk("onenand_erase: Unaligned address\n");
1829 instr->state = MTD_ERASE_DONE;
1833 ret = instr->state == MTD_ERASE_DONE ? 0 : -EIO;
1834 /* Do call back function */
1836 mtd_erase_callback(instr);
1838 /* Deselect and wake up anyone waiting on the device */
1839 onenand_release_device(mtd);
1845 * onenand_sync - [MTD Interface] sync
1846 * @param mtd MTD device structure
1848 * Sync is actually a wait for chip ready function
1850 void onenand_sync(struct mtd_info *mtd)
1852 MTDDEBUG (MTD_DEBUG_LEVEL3, "onenand_sync: called\n");
1854 /* Grab the lock and see if the device is available */
1855 onenand_get_device(mtd, FL_SYNCING);
1857 /* Release it and go back */
1858 onenand_release_device(mtd);
1862 * onenand_block_isbad - [MTD Interface] Check whether the block at the given offset is bad
1863 * @param mtd MTD device structure
1864 * @param ofs offset relative to mtd start
1866 * Check whether the block is bad
1868 int onenand_block_isbad(struct mtd_info *mtd, loff_t ofs)
1872 /* Check for invalid offset */
1873 if (ofs > mtd->size)
1876 onenand_get_device(mtd, FL_READING);
1877 ret = onenand_block_isbad_nolock(mtd,ofs, 0);
1878 onenand_release_device(mtd);
1883 * onenand_default_block_markbad - [DEFAULT] mark a block bad
1884 * @param mtd MTD device structure
1885 * @param ofs offset from device start
1887 * This is the default implementation, which can be overridden by
1888 * a hardware specific driver.
1890 static int onenand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
1892 struct onenand_chip *this = mtd->priv;
1893 struct bbm_info *bbm = this->bbm;
1894 u_char buf[2] = {0, 0};
1895 struct mtd_oob_ops ops = {
1896 .mode = MTD_OOB_PLACE,
1903 /* Get block number */
1904 block = onenand_block(this, ofs);
1906 bbm->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1);
1908 /* We write two bytes, so we dont have to mess with 16 bit access */
1909 ofs += mtd->oobsize + (bbm->badblockpos & ~0x01);
1910 return onenand_write_oob_nolock(mtd, ofs, &ops);
1914 * onenand_block_markbad - [MTD Interface] Mark the block at the given offset as bad
1915 * @param mtd MTD device structure
1916 * @param ofs offset relative to mtd start
1918 * Mark the block as bad
1920 int onenand_block_markbad(struct mtd_info *mtd, loff_t ofs)
1922 struct onenand_chip *this = mtd->priv;
1925 ret = onenand_block_isbad(mtd, ofs);
1927 /* If it was bad already, return success and do nothing */
1933 ret = this->block_markbad(mtd, ofs);
1938 * onenand_do_lock_cmd - [OneNAND Interface] Lock or unlock block(s)
1939 * @param mtd MTD device structure
1940 * @param ofs offset relative to mtd start
1941 * @param len number of bytes to lock or unlock
1942 * @param cmd lock or unlock command
1944 * Lock or unlock one or more blocks
1946 static int onenand_do_lock_cmd(struct mtd_info *mtd, loff_t ofs, size_t len, int cmd)
1948 struct onenand_chip *this = mtd->priv;
1949 int start, end, block, value, status;
1951 start = onenand_block(this, ofs);
1952 end = onenand_block(this, ofs + len);
1954 /* Continuous lock scheme */
1955 if (this->options & ONENAND_HAS_CONT_LOCK) {
1956 /* Set start block address */
1957 this->write_word(start,
1958 this->base + ONENAND_REG_START_BLOCK_ADDRESS);
1959 /* Set end block address */
1960 this->write_word(end - 1,
1961 this->base + ONENAND_REG_END_BLOCK_ADDRESS);
1962 /* Write unlock command */
1963 this->command(mtd, cmd, 0, 0);
1965 /* There's no return value */
1966 this->wait(mtd, FL_UNLOCKING);
1969 while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
1970 & ONENAND_CTRL_ONGO)
1973 /* Check lock status */
1974 status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
1975 if (!(status & ONENAND_WP_US))
1976 printk(KERN_ERR "wp status = 0x%x\n", status);
1981 /* Block lock scheme */
1982 for (block = start; block < end; block++) {
1983 /* Set block address */
1984 value = onenand_block_address(this, block);
1985 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
1986 /* Select DataRAM for DDP */
1987 value = onenand_bufferram_address(this, block);
1988 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
1990 /* Set start block address */
1991 this->write_word(block,
1992 this->base + ONENAND_REG_START_BLOCK_ADDRESS);
1993 /* Write unlock command */
1994 this->command(mtd, ONENAND_CMD_UNLOCK, 0, 0);
1996 /* There's no return value */
1997 this->wait(mtd, FL_UNLOCKING);
2000 while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
2001 & ONENAND_CTRL_ONGO)
2004 /* Check lock status */
2005 status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
2006 if (!(status & ONENAND_WP_US))
2007 printk(KERN_ERR "block = %d, wp status = 0x%x\n",
2014 #ifdef ONENAND_LINUX
2016 * onenand_lock - [MTD Interface] Lock block(s)
2017 * @param mtd MTD device structure
2018 * @param ofs offset relative to mtd start
2019 * @param len number of bytes to unlock
2021 * Lock one or more blocks
2023 static int onenand_lock(struct mtd_info *mtd, loff_t ofs, size_t len)
2027 onenand_get_device(mtd, FL_LOCKING);
2028 ret = onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_LOCK);
2029 onenand_release_device(mtd);
2034 * onenand_unlock - [MTD Interface] Unlock block(s)
2035 * @param mtd MTD device structure
2036 * @param ofs offset relative to mtd start
2037 * @param len number of bytes to unlock
2039 * Unlock one or more blocks
2041 static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
2045 onenand_get_device(mtd, FL_LOCKING);
2046 ret = onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK);
2047 onenand_release_device(mtd);
2053 * onenand_check_lock_status - [OneNAND Interface] Check lock status
2054 * @param this onenand chip data structure
2058 static int onenand_check_lock_status(struct onenand_chip *this)
2060 unsigned int value, block, status;
2063 end = this->chipsize >> this->erase_shift;
2064 for (block = 0; block < end; block++) {
2065 /* Set block address */
2066 value = onenand_block_address(this, block);
2067 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
2068 /* Select DataRAM for DDP */
2069 value = onenand_bufferram_address(this, block);
2070 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
2071 /* Set start block address */
2072 this->write_word(block, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
2074 /* Check lock status */
2075 status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
2076 if (!(status & ONENAND_WP_US)) {
2077 printk(KERN_ERR "block = %d, wp status = 0x%x\n", block, status);
2086 * onenand_unlock_all - [OneNAND Interface] unlock all blocks
2087 * @param mtd MTD device structure
2091 static void onenand_unlock_all(struct mtd_info *mtd)
2093 struct onenand_chip *this = mtd->priv;
2095 size_t len = mtd->size;
2097 if (this->options & ONENAND_HAS_UNLOCK_ALL) {
2098 /* Set start block address */
2099 this->write_word(0, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
2100 /* Write unlock command */
2101 this->command(mtd, ONENAND_CMD_UNLOCK_ALL, 0, 0);
2103 /* There's no return value */
2104 this->wait(mtd, FL_LOCKING);
2107 while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
2108 & ONENAND_CTRL_ONGO)
2111 /* Check lock status */
2112 if (onenand_check_lock_status(this))
2115 /* Workaround for all block unlock in DDP */
2116 if (ONENAND_IS_DDP(this) && !FLEXONENAND(this)) {
2117 /* All blocks on another chip */
2118 ofs = this->chipsize >> 1;
2119 len = this->chipsize >> 1;
2123 onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK);
2128 * onenand_check_features - Check and set OneNAND features
2129 * @param mtd MTD data structure
2131 * Check and set OneNAND features
2135 static void onenand_check_features(struct mtd_info *mtd)
2137 struct onenand_chip *this = mtd->priv;
2138 unsigned int density, process;
2140 /* Lock scheme depends on density and process */
2141 density = onenand_get_density(this->device_id);
2142 process = this->version_id >> ONENAND_VERSION_PROCESS_SHIFT;
2146 case ONENAND_DEVICE_DENSITY_4Gb:
2147 if (ONENAND_IS_DDP(this))
2148 this->options |= ONENAND_HAS_2PLANE;
2150 this->options |= ONENAND_HAS_4KB_PAGE;
2152 case ONENAND_DEVICE_DENSITY_2Gb:
2153 /* 2Gb DDP don't have 2 plane */
2154 if (!ONENAND_IS_DDP(this))
2155 this->options |= ONENAND_HAS_2PLANE;
2156 this->options |= ONENAND_HAS_UNLOCK_ALL;
2158 case ONENAND_DEVICE_DENSITY_1Gb:
2159 /* A-Die has all block unlock */
2161 this->options |= ONENAND_HAS_UNLOCK_ALL;
2165 /* Some OneNAND has continuous lock scheme */
2167 this->options |= ONENAND_HAS_CONT_LOCK;
2171 if (ONENAND_IS_MLC(this))
2172 this->options |= ONENAND_HAS_4KB_PAGE;
2174 if (ONENAND_IS_4KB_PAGE(this))
2175 this->options &= ~ONENAND_HAS_2PLANE;
2177 if (FLEXONENAND(this)) {
2178 this->options &= ~ONENAND_HAS_CONT_LOCK;
2179 this->options |= ONENAND_HAS_UNLOCK_ALL;
2182 if (this->options & ONENAND_HAS_CONT_LOCK)
2183 printk(KERN_DEBUG "Lock scheme is Continuous Lock\n");
2184 if (this->options & ONENAND_HAS_UNLOCK_ALL)
2185 printk(KERN_DEBUG "Chip support all block unlock\n");
2186 if (this->options & ONENAND_HAS_2PLANE)
2187 printk(KERN_DEBUG "Chip has 2 plane\n");
2188 if (this->options & ONENAND_HAS_4KB_PAGE)
2189 printk(KERN_DEBUG "Chip has 4KiB pagesize\n");
2194 * onenand_print_device_info - Print device ID
2195 * @param device device ID
2199 char *onenand_print_device_info(int device, int version)
2201 int vcc, demuxed, ddp, density, flexonenand;
2202 char *dev_info = malloc(80);
2205 vcc = device & ONENAND_DEVICE_VCC_MASK;
2206 demuxed = device & ONENAND_DEVICE_IS_DEMUX;
2207 ddp = device & ONENAND_DEVICE_IS_DDP;
2208 density = onenand_get_density(device);
2209 flexonenand = device & DEVICE_IS_FLEXONENAND;
2210 p += sprintf(dev_info, "%s%sOneNAND%s %dMB %sV 16-bit (0x%02x)",
2211 demuxed ? "" : "Muxed ",
2212 flexonenand ? "Flex-" : "",
2214 (16 << density), vcc ? "2.65/3.3" : "1.8", device);
2216 sprintf(p, "\nOneNAND version = 0x%04x", version);
2217 printk("%s\n", dev_info);
2222 static const struct onenand_manufacturers onenand_manuf_ids[] = {
2223 {ONENAND_MFR_NUMONYX, "Numonyx"},
2224 {ONENAND_MFR_SAMSUNG, "Samsung"},
2228 * onenand_check_maf - Check manufacturer ID
2229 * @param manuf manufacturer ID
2231 * Check manufacturer ID
2233 static int onenand_check_maf(int manuf)
2235 int size = ARRAY_SIZE(onenand_manuf_ids);
2237 #ifdef ONENAND_DEBUG
2241 for (i = 0; i < size; i++)
2242 if (manuf == onenand_manuf_ids[i].id)
2245 #ifdef ONENAND_DEBUG
2247 name = onenand_manuf_ids[i].name;
2251 printk(KERN_DEBUG "OneNAND Manufacturer: %s (0x%0x)\n", name, manuf);
2258 * flexonenand_get_boundary - Reads the SLC boundary
2259 * @param onenand_info - onenand info structure
2261 * Fill up boundary[] field in onenand_chip
2263 static int flexonenand_get_boundary(struct mtd_info *mtd)
2265 struct onenand_chip *this = mtd->priv;
2266 unsigned int die, bdry;
2270 syscfg = this->read_word(this->base + ONENAND_REG_SYS_CFG1);
2271 this->write_word((syscfg | 0x0100), this->base + ONENAND_REG_SYS_CFG1);
2273 for (die = 0; die < this->dies; die++) {
2274 this->command(mtd, FLEXONENAND_CMD_PI_ACCESS, die, 0);
2275 this->wait(mtd, FL_SYNCING);
2277 this->command(mtd, FLEXONENAND_CMD_READ_PI, die, 0);
2278 this->wait(mtd, FL_READING);
2280 bdry = this->read_word(this->base + ONENAND_DATARAM);
2281 if ((bdry >> FLEXONENAND_PI_UNLOCK_SHIFT) == 3)
2285 this->boundary[die] = bdry & FLEXONENAND_PI_MASK;
2287 this->command(mtd, ONENAND_CMD_RESET, 0, 0);
2288 this->wait(mtd, FL_RESETING);
2290 printk(KERN_INFO "Die %d boundary: %d%s\n", die,
2291 this->boundary[die], locked ? "(Locked)" : "(Unlocked)");
2295 this->write_word(syscfg, this->base + ONENAND_REG_SYS_CFG1);
2300 * flexonenand_get_size - Fill up fields in onenand_chip and mtd_info
2301 * boundary[], diesize[], mtd->size, mtd->erasesize,
2303 * @param mtd - MTD device structure
2305 static void flexonenand_get_size(struct mtd_info *mtd)
2307 struct onenand_chip *this = mtd->priv;
2308 int die, i, eraseshift, density;
2309 int blksperdie, maxbdry;
2312 density = onenand_get_density(this->device_id);
2313 blksperdie = ((loff_t)(16 << density) << 20) >> (this->erase_shift);
2314 blksperdie >>= ONENAND_IS_DDP(this) ? 1 : 0;
2315 maxbdry = blksperdie - 1;
2316 eraseshift = this->erase_shift - 1;
2318 mtd->numeraseregions = this->dies << 1;
2320 /* This fills up the device boundary */
2321 flexonenand_get_boundary(mtd);
2325 for (; die < this->dies; die++) {
2326 if (!die || this->boundary[die-1] != maxbdry) {
2328 mtd->eraseregions[i].offset = ofs;
2329 mtd->eraseregions[i].erasesize = 1 << eraseshift;
2330 mtd->eraseregions[i].numblocks =
2331 this->boundary[die] + 1;
2332 ofs += mtd->eraseregions[i].numblocks << eraseshift;
2335 mtd->numeraseregions -= 1;
2336 mtd->eraseregions[i].numblocks +=
2337 this->boundary[die] + 1;
2338 ofs += (this->boundary[die] + 1) << (eraseshift - 1);
2340 if (this->boundary[die] != maxbdry) {
2342 mtd->eraseregions[i].offset = ofs;
2343 mtd->eraseregions[i].erasesize = 1 << eraseshift;
2344 mtd->eraseregions[i].numblocks = maxbdry ^
2345 this->boundary[die];
2346 ofs += mtd->eraseregions[i].numblocks << eraseshift;
2349 mtd->numeraseregions -= 1;
2352 /* Expose MLC erase size except when all blocks are SLC */
2353 mtd->erasesize = 1 << this->erase_shift;
2354 if (mtd->numeraseregions == 1)
2355 mtd->erasesize >>= 1;
2357 printk(KERN_INFO "Device has %d eraseregions\n", mtd->numeraseregions);
2358 for (i = 0; i < mtd->numeraseregions; i++)
2359 printk(KERN_INFO "[offset: 0x%08llx, erasesize: 0x%05x,"
2360 " numblocks: %04u]\n", mtd->eraseregions[i].offset,
2361 mtd->eraseregions[i].erasesize,
2362 mtd->eraseregions[i].numblocks);
2364 for (die = 0, mtd->size = 0; die < this->dies; die++) {
2365 this->diesize[die] = (loff_t) (blksperdie << this->erase_shift);
2366 this->diesize[die] -= (loff_t) (this->boundary[die] + 1)
2367 << (this->erase_shift - 1);
2368 mtd->size += this->diesize[die];
2373 * flexonenand_check_blocks_erased - Check if blocks are erased
2374 * @param mtd_info - mtd info structure
2375 * @param start - first erase block to check
2376 * @param end - last erase block to check
2378 * Converting an unerased block from MLC to SLC
2379 * causes byte values to change. Since both data and its ECC
2380 * have changed, reads on the block give uncorrectable error.
2381 * This might lead to the block being detected as bad.
2383 * Avoid this by ensuring that the block to be converted is
2386 static int flexonenand_check_blocks_erased(struct mtd_info *mtd,
2389 struct onenand_chip *this = mtd->priv;
2392 struct mtd_oob_ops ops = {
2393 .mode = MTD_OOB_PLACE,
2395 .ooblen = mtd->oobsize,
2397 .oobbuf = this->oob_buf,
2401 printk(KERN_DEBUG "Check blocks from %d to %d\n", start, end);
2403 for (block = start; block <= end; block++) {
2404 addr = flexonenand_addr(this, block);
2405 if (onenand_block_isbad_nolock(mtd, addr, 0))
2409 * Since main area write results in ECC write to spare,
2410 * it is sufficient to check only ECC bytes for change.
2412 ret = onenand_read_oob_nolock(mtd, addr, &ops);
2416 for (i = 0; i < mtd->oobsize; i++)
2417 if (this->oob_buf[i] != 0xff)
2420 if (i != mtd->oobsize) {
2421 printk(KERN_WARNING "Block %d not erased.\n", block);
2430 * flexonenand_set_boundary - Writes the SLC boundary
2431 * @param mtd - mtd info structure
2433 int flexonenand_set_boundary(struct mtd_info *mtd, int die,
2434 int boundary, int lock)
2436 struct onenand_chip *this = mtd->priv;
2437 int ret, density, blksperdie, old, new, thisboundary;
2440 if (die >= this->dies)
2443 if (boundary == this->boundary[die])
2446 density = onenand_get_density(this->device_id);
2447 blksperdie = ((16 << density) << 20) >> this->erase_shift;
2448 blksperdie >>= ONENAND_IS_DDP(this) ? 1 : 0;
2450 if (boundary >= blksperdie) {
2451 printk("flexonenand_set_boundary:"
2452 "Invalid boundary value. "
2453 "Boundary not changed.\n");
2457 /* Check if converting blocks are erased */
2458 old = this->boundary[die] + (die * this->density_mask);
2459 new = boundary + (die * this->density_mask);
2460 ret = flexonenand_check_blocks_erased(mtd, min(old, new)
2461 + 1, max(old, new));
2463 printk(KERN_ERR "flexonenand_set_boundary: Please erase blocks before boundary change\n");
2467 this->command(mtd, FLEXONENAND_CMD_PI_ACCESS, die, 0);
2468 this->wait(mtd, FL_SYNCING);
2470 /* Check is boundary is locked */
2471 this->command(mtd, FLEXONENAND_CMD_READ_PI, die, 0);
2472 ret = this->wait(mtd, FL_READING);
2474 thisboundary = this->read_word(this->base + ONENAND_DATARAM);
2475 if ((thisboundary >> FLEXONENAND_PI_UNLOCK_SHIFT) != 3) {
2476 printk(KERN_ERR "flexonenand_set_boundary: boundary locked\n");
2480 printk(KERN_INFO "flexonenand_set_boundary: Changing die %d boundary: %d%s\n",
2481 die, boundary, lock ? "(Locked)" : "(Unlocked)");
2483 boundary &= FLEXONENAND_PI_MASK;
2484 boundary |= lock ? 0 : (3 << FLEXONENAND_PI_UNLOCK_SHIFT);
2486 addr = die ? this->diesize[0] : 0;
2487 this->command(mtd, ONENAND_CMD_ERASE, addr, 0);
2488 ret = this->wait(mtd, FL_ERASING);
2490 printk("flexonenand_set_boundary:"
2491 "Failed PI erase for Die %d\n", die);
2495 this->write_word(boundary, this->base + ONENAND_DATARAM);
2496 this->command(mtd, ONENAND_CMD_PROG, addr, 0);
2497 ret = this->wait(mtd, FL_WRITING);
2499 printk("flexonenand_set_boundary:"
2500 "Failed PI write for Die %d\n", die);
2504 this->command(mtd, FLEXONENAND_CMD_PI_UPDATE, die, 0);
2505 ret = this->wait(mtd, FL_WRITING);
2507 this->write_word(ONENAND_CMD_RESET, this->base + ONENAND_REG_COMMAND);
2508 this->wait(mtd, FL_RESETING);
2510 /* Recalculate device size on boundary change*/
2511 flexonenand_get_size(mtd);
2517 * onenand_chip_probe - [OneNAND Interface] Probe the OneNAND chip
2518 * @param mtd MTD device structure
2520 * OneNAND detection method:
2521 * Compare the the values from command with ones from register
2523 static int onenand_chip_probe(struct mtd_info *mtd)
2525 struct onenand_chip *this = mtd->priv;
2526 int bram_maf_id, bram_dev_id, maf_id, dev_id;
2529 /* Save system configuration 1 */
2530 syscfg = this->read_word(this->base + ONENAND_REG_SYS_CFG1);
2532 /* Clear Sync. Burst Read mode to read BootRAM */
2533 this->write_word((syscfg & ~ONENAND_SYS_CFG1_SYNC_READ),
2534 this->base + ONENAND_REG_SYS_CFG1);
2536 /* Send the command for reading device ID from BootRAM */
2537 this->write_word(ONENAND_CMD_READID, this->base + ONENAND_BOOTRAM);
2539 /* Read manufacturer and device IDs from BootRAM */
2540 bram_maf_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x0);
2541 bram_dev_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x2);
2543 /* Reset OneNAND to read default register values */
2544 this->write_word(ONENAND_CMD_RESET, this->base + ONENAND_BOOTRAM);
2547 this->wait(mtd, FL_RESETING);
2549 /* Restore system configuration 1 */
2550 this->write_word(syscfg, this->base + ONENAND_REG_SYS_CFG1);
2552 /* Check manufacturer ID */
2553 if (onenand_check_maf(bram_maf_id))
2556 /* Read manufacturer and device IDs from Register */
2557 maf_id = this->read_word(this->base + ONENAND_REG_MANUFACTURER_ID);
2558 dev_id = this->read_word(this->base + ONENAND_REG_DEVICE_ID);
2560 /* Check OneNAND device */
2561 if (maf_id != bram_maf_id || dev_id != bram_dev_id)
2568 * onenand_probe - [OneNAND Interface] Probe the OneNAND device
2569 * @param mtd MTD device structure
2571 * OneNAND detection method:
2572 * Compare the the values from command with ones from register
2574 int onenand_probe(struct mtd_info *mtd)
2576 struct onenand_chip *this = mtd->priv;
2581 ret = this->chip_probe(mtd);
2585 /* Read device IDs from Register */
2586 dev_id = this->read_word(this->base + ONENAND_REG_DEVICE_ID);
2587 ver_id = this->read_word(this->base + ONENAND_REG_VERSION_ID);
2588 this->technology = this->read_word(this->base + ONENAND_REG_TECHNOLOGY);
2590 /* Flash device information */
2591 mtd->name = onenand_print_device_info(dev_id, ver_id);
2592 this->device_id = dev_id;
2593 this->version_id = ver_id;
2595 /* Check OneNAND features */
2596 onenand_check_features(mtd);
2598 density = onenand_get_density(dev_id);
2599 if (FLEXONENAND(this)) {
2600 this->dies = ONENAND_IS_DDP(this) ? 2 : 1;
2601 /* Maximum possible erase regions */
2602 mtd->numeraseregions = this->dies << 1;
2603 mtd->eraseregions = malloc(sizeof(struct mtd_erase_region_info)
2604 * (this->dies << 1));
2605 if (!mtd->eraseregions)
2610 * For Flex-OneNAND, chipsize represents maximum possible device size.
2611 * mtd->size represents the actual device size.
2613 this->chipsize = (16 << density) << 20;
2615 /* OneNAND page size & block size */
2616 /* The data buffer size is equal to page size */
2618 this->read_word(this->base + ONENAND_REG_DATA_BUFFER_SIZE);
2619 /* We use the full BufferRAM */
2620 if (ONENAND_IS_4KB_PAGE(this))
2621 mtd->writesize <<= 1;
2623 mtd->oobsize = mtd->writesize >> 5;
2624 /* Pagers per block is always 64 in OneNAND */
2625 mtd->erasesize = mtd->writesize << 6;
2627 * Flex-OneNAND SLC area has 64 pages per block.
2628 * Flex-OneNAND MLC area has 128 pages per block.
2629 * Expose MLC erase size to find erase_shift and page_mask.
2631 if (FLEXONENAND(this))
2632 mtd->erasesize <<= 1;
2634 this->erase_shift = ffs(mtd->erasesize) - 1;
2635 this->page_shift = ffs(mtd->writesize) - 1;
2636 this->ppb_shift = (this->erase_shift - this->page_shift);
2637 this->page_mask = (mtd->erasesize / mtd->writesize) - 1;
2638 /* Set density mask. it is used for DDP */
2639 if (ONENAND_IS_DDP(this))
2640 this->density_mask = this->chipsize >> (this->erase_shift + 1);
2641 /* It's real page size */
2642 this->writesize = mtd->writesize;
2644 /* REVIST: Multichip handling */
2646 if (FLEXONENAND(this))
2647 flexonenand_get_size(mtd);
2649 mtd->size = this->chipsize;
2651 mtd->flags = MTD_CAP_NANDFLASH;
2652 mtd->erase = onenand_erase;
2653 mtd->read = onenand_read;
2654 mtd->write = onenand_write;
2655 mtd->read_oob = onenand_read_oob;
2656 mtd->write_oob = onenand_write_oob;
2657 mtd->sync = onenand_sync;
2658 mtd->block_isbad = onenand_block_isbad;
2659 mtd->block_markbad = onenand_block_markbad;
2665 * onenand_scan - [OneNAND Interface] Scan for the OneNAND device
2666 * @param mtd MTD device structure
2667 * @param maxchips Number of chips to scan for
2669 * This fills out all the not initialized function pointers
2670 * with the defaults.
2671 * The flash ID is read and the mtd/chip structures are
2672 * filled with the appropriate values.
2674 int onenand_scan(struct mtd_info *mtd, int maxchips)
2677 struct onenand_chip *this = mtd->priv;
2679 if (!this->read_word)
2680 this->read_word = onenand_readw;
2681 if (!this->write_word)
2682 this->write_word = onenand_writew;
2685 this->command = onenand_command;
2687 this->wait = onenand_wait;
2688 if (!this->bbt_wait)
2689 this->bbt_wait = onenand_bbt_wait;
2691 if (!this->read_bufferram)
2692 this->read_bufferram = onenand_read_bufferram;
2693 if (!this->write_bufferram)
2694 this->write_bufferram = onenand_write_bufferram;
2696 if (!this->chip_probe)
2697 this->chip_probe = onenand_chip_probe;
2699 if (!this->block_markbad)
2700 this->block_markbad = onenand_default_block_markbad;
2701 if (!this->scan_bbt)
2702 this->scan_bbt = onenand_default_bbt;
2704 if (onenand_probe(mtd))
2707 /* Set Sync. Burst Read after probing */
2708 if (this->mmcontrol) {
2709 printk(KERN_INFO "OneNAND Sync. Burst Read support\n");
2710 this->read_bufferram = onenand_sync_read_bufferram;
2713 /* Allocate buffers, if necessary */
2714 if (!this->page_buf) {
2715 this->page_buf = kzalloc(mtd->writesize, GFP_KERNEL);
2716 if (!this->page_buf) {
2717 printk(KERN_ERR "onenand_scan(): Can't allocate page_buf\n");
2720 this->options |= ONENAND_PAGEBUF_ALLOC;
2722 if (!this->oob_buf) {
2723 this->oob_buf = kzalloc(mtd->oobsize, GFP_KERNEL);
2724 if (!this->oob_buf) {
2725 printk(KERN_ERR "onenand_scan: Can't allocate oob_buf\n");
2726 if (this->options & ONENAND_PAGEBUF_ALLOC) {
2727 this->options &= ~ONENAND_PAGEBUF_ALLOC;
2728 kfree(this->page_buf);
2732 this->options |= ONENAND_OOBBUF_ALLOC;
2735 this->state = FL_READY;
2738 * Allow subpage writes up to oobsize.
2740 switch (mtd->oobsize) {
2742 this->ecclayout = &onenand_oob_128;
2743 mtd->subpage_sft = 0;
2747 this->ecclayout = &onenand_oob_64;
2748 mtd->subpage_sft = 2;
2752 this->ecclayout = &onenand_oob_32;
2753 mtd->subpage_sft = 1;
2757 printk(KERN_WARNING "No OOB scheme defined for oobsize %d\n",
2759 mtd->subpage_sft = 0;
2760 /* To prevent kernel oops */
2761 this->ecclayout = &onenand_oob_32;
2765 this->subpagesize = mtd->writesize >> mtd->subpage_sft;
2768 * The number of bytes available for a client to place data into
2769 * the out of band area
2771 this->ecclayout->oobavail = 0;
2772 for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES &&
2773 this->ecclayout->oobfree[i].length; i++)
2774 this->ecclayout->oobavail +=
2775 this->ecclayout->oobfree[i].length;
2776 mtd->oobavail = this->ecclayout->oobavail;
2778 mtd->ecclayout = this->ecclayout;
2780 /* Unlock whole block */
2781 onenand_unlock_all(mtd);
2783 return this->scan_bbt(mtd);
2787 * onenand_release - [OneNAND Interface] Free resources held by the OneNAND device
2788 * @param mtd MTD device structure
2790 void onenand_release(struct mtd_info *mtd)