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.
24 #include <linux/compat.h>
25 #include <linux/mtd/mtd.h>
26 #include "linux/mtd/flashchip.h"
27 #include <linux/mtd/onenand.h>
30 #include <asm/errno.h>
33 /* It should access 16-bit instead of 8-bit */
34 static void *memcpy_16(void *dst, const void *src, unsigned int len)
47 * onenand_oob_128 - oob info for Flex-Onenand with 4KB page
48 * For now, we expose only 64 out of 80 ecc bytes
50 static struct nand_ecclayout onenand_oob_128 = {
53 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
54 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
55 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
56 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
57 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
58 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
62 {2, 4}, {18, 4}, {34, 4}, {50, 4},
63 {66, 4}, {82, 4}, {98, 4}, {114, 4}
68 * onenand_oob_64 - oob info for large (2KB) page
70 static struct nand_ecclayout onenand_oob_64 = {
79 {2, 3}, {14, 2}, {18, 3}, {30, 2},
80 {34, 3}, {46, 2}, {50, 3}, {62, 2}
85 * onenand_oob_32 - oob info for middle (1KB) page
87 static struct nand_ecclayout onenand_oob_32 = {
93 .oobfree = { {2, 3}, {14, 2}, {18, 3}, {30, 2} }
97 * Warning! This array is used with the memcpy_16() function, thus
98 * it must be aligned to 2 bytes. GCC can make this array unaligned
99 * as the array is made of unsigned char, which memcpy16() doesn't
100 * like and will cause unaligned access.
102 static const unsigned char __aligned(2) ffchars[] = {
103 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
104 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 16 */
105 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
106 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 32 */
107 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
108 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 48 */
109 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
110 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 64 */
111 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
112 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 80 */
113 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
114 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 96 */
115 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
116 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 112 */
117 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
118 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 128 */
122 * onenand_readw - [OneNAND Interface] Read OneNAND register
123 * @param addr address to read
125 * Read OneNAND register
127 static unsigned short onenand_readw(void __iomem * addr)
133 * onenand_writew - [OneNAND Interface] Write OneNAND register with value
134 * @param value value to write
135 * @param addr address to write
137 * Write OneNAND register with value
139 static void onenand_writew(unsigned short value, void __iomem * addr)
145 * onenand_block_address - [DEFAULT] Get block address
146 * @param device the device id
147 * @param block the block
148 * @return translated block address if DDP, otherwise same
150 * Setup Start Address 1 Register (F100h)
152 static int onenand_block_address(struct onenand_chip *this, int block)
154 /* Device Flash Core select, NAND Flash Block Address */
155 if (block & this->density_mask)
156 return ONENAND_DDP_CHIP1 | (block ^ this->density_mask);
162 * onenand_bufferram_address - [DEFAULT] Get bufferram address
163 * @param device the device id
164 * @param block the block
165 * @return set DBS value if DDP, otherwise 0
167 * Setup Start Address 2 Register (F101h) for DDP
169 static int onenand_bufferram_address(struct onenand_chip *this, int block)
171 /* Device BufferRAM Select */
172 if (block & this->density_mask)
173 return ONENAND_DDP_CHIP1;
175 return ONENAND_DDP_CHIP0;
179 * onenand_page_address - [DEFAULT] Get page address
180 * @param page the page address
181 * @param sector the sector address
182 * @return combined page and sector address
184 * Setup Start Address 8 Register (F107h)
186 static int onenand_page_address(int page, int sector)
188 /* Flash Page Address, Flash Sector Address */
191 fpa = page & ONENAND_FPA_MASK;
192 fsa = sector & ONENAND_FSA_MASK;
194 return ((fpa << ONENAND_FPA_SHIFT) | fsa);
198 * onenand_buffer_address - [DEFAULT] Get buffer address
199 * @param dataram1 DataRAM index
200 * @param sectors the sector address
201 * @param count the number of sectors
202 * @return the start buffer value
204 * Setup Start Buffer Register (F200h)
206 static int onenand_buffer_address(int dataram1, int sectors, int count)
210 /* BufferRAM Sector Address */
211 bsa = sectors & ONENAND_BSA_MASK;
214 bsa |= ONENAND_BSA_DATARAM1; /* DataRAM1 */
216 bsa |= ONENAND_BSA_DATARAM0; /* DataRAM0 */
218 /* BufferRAM Sector Count */
219 bsc = count & ONENAND_BSC_MASK;
221 return ((bsa << ONENAND_BSA_SHIFT) | bsc);
225 * flexonenand_block - Return block number for flash address
226 * @param this - OneNAND device structure
227 * @param addr - Address for which block number is needed
229 static unsigned int flexonenand_block(struct onenand_chip *this, loff_t addr)
231 unsigned int boundary, blk, die = 0;
233 if (ONENAND_IS_DDP(this) && addr >= this->diesize[0]) {
235 addr -= this->diesize[0];
238 boundary = this->boundary[die];
240 blk = addr >> (this->erase_shift - 1);
242 blk = (blk + boundary + 1) >> 1;
244 blk += die ? this->density_mask : 0;
248 unsigned int onenand_block(struct onenand_chip *this, loff_t addr)
250 if (!FLEXONENAND(this))
251 return addr >> this->erase_shift;
252 return flexonenand_block(this, addr);
256 * flexonenand_addr - Return address of the block
257 * @this: OneNAND device structure
258 * @block: Block number on Flex-OneNAND
260 * Return address of the block
262 static loff_t flexonenand_addr(struct onenand_chip *this, int block)
265 int die = 0, boundary;
267 if (ONENAND_IS_DDP(this) && block >= this->density_mask) {
268 block -= this->density_mask;
270 ofs = this->diesize[0];
273 boundary = this->boundary[die];
274 ofs += (loff_t) block << (this->erase_shift - 1);
275 if (block > (boundary + 1))
276 ofs += (loff_t) (block - boundary - 1)
277 << (this->erase_shift - 1);
281 loff_t onenand_addr(struct onenand_chip *this, int block)
283 if (!FLEXONENAND(this))
284 return (loff_t) block << this->erase_shift;
285 return flexonenand_addr(this, block);
289 * flexonenand_region - [Flex-OneNAND] Return erase region of addr
290 * @param mtd MTD device structure
291 * @param addr address whose erase region needs to be identified
293 int flexonenand_region(struct mtd_info *mtd, loff_t addr)
297 for (i = 0; i < mtd->numeraseregions; i++)
298 if (addr < mtd->eraseregions[i].offset)
304 * onenand_get_density - [DEFAULT] Get OneNAND density
305 * @param dev_id OneNAND device ID
307 * Get OneNAND density from device ID
309 static inline int onenand_get_density(int dev_id)
311 int density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT;
312 return (density & ONENAND_DEVICE_DENSITY_MASK);
316 * onenand_command - [DEFAULT] Send command to OneNAND device
317 * @param mtd MTD device structure
318 * @param cmd the command to be sent
319 * @param addr offset to read from or write to
320 * @param len number of bytes to read or write
322 * Send command to OneNAND device. This function is used for middle/large page
323 * devices (1KB/2KB Bytes per page)
325 static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr,
328 struct onenand_chip *this = mtd->priv;
332 /* Now we use page size operation */
333 int sectors = 0, count = 0;
335 /* Address translation */
337 case ONENAND_CMD_UNLOCK:
338 case ONENAND_CMD_LOCK:
339 case ONENAND_CMD_LOCK_TIGHT:
340 case ONENAND_CMD_UNLOCK_ALL:
345 case FLEXONENAND_CMD_PI_ACCESS:
346 /* addr contains die index */
347 block = addr * this->density_mask;
351 case ONENAND_CMD_ERASE:
352 case ONENAND_CMD_BUFFERRAM:
353 block = onenand_block(this, addr);
357 case FLEXONENAND_CMD_READ_PI:
358 cmd = ONENAND_CMD_READ;
359 block = addr * this->density_mask;
364 block = onenand_block(this, addr);
366 - onenand_addr(this, block)) >> this->page_shift;
367 page &= this->page_mask;
371 /* NOTE: The setting order of the registers is very important! */
372 if (cmd == ONENAND_CMD_BUFFERRAM) {
373 /* Select DataRAM for DDP */
374 value = onenand_bufferram_address(this, block);
375 this->write_word(value,
376 this->base + ONENAND_REG_START_ADDRESS2);
378 if (ONENAND_IS_4KB_PAGE(this))
379 ONENAND_SET_BUFFERRAM0(this);
381 /* Switch to the next data buffer */
382 ONENAND_SET_NEXT_BUFFERRAM(this);
388 /* Write 'DFS, FBA' of Flash */
389 value = onenand_block_address(this, block);
390 this->write_word(value,
391 this->base + ONENAND_REG_START_ADDRESS1);
393 /* Select DataRAM for DDP */
394 value = onenand_bufferram_address(this, block);
395 this->write_word(value,
396 this->base + ONENAND_REG_START_ADDRESS2);
403 case FLEXONENAND_CMD_RECOVER_LSB:
404 case ONENAND_CMD_READ:
405 case ONENAND_CMD_READOOB:
406 if (ONENAND_IS_4KB_PAGE(this))
407 dataram = ONENAND_SET_BUFFERRAM0(this);
409 dataram = ONENAND_SET_NEXT_BUFFERRAM(this);
414 dataram = ONENAND_CURRENT_BUFFERRAM(this);
418 /* Write 'FPA, FSA' of Flash */
419 value = onenand_page_address(page, sectors);
420 this->write_word(value,
421 this->base + ONENAND_REG_START_ADDRESS8);
423 /* Write 'BSA, BSC' of DataRAM */
424 value = onenand_buffer_address(dataram, sectors, count);
425 this->write_word(value, this->base + ONENAND_REG_START_BUFFER);
428 /* Interrupt clear */
429 this->write_word(ONENAND_INT_CLEAR, this->base + ONENAND_REG_INTERRUPT);
431 this->write_word(cmd, this->base + ONENAND_REG_COMMAND);
437 * onenand_read_ecc - return ecc status
438 * @param this onenand chip structure
440 static int onenand_read_ecc(struct onenand_chip *this)
444 if (!FLEXONENAND(this))
445 return this->read_word(this->base + ONENAND_REG_ECC_STATUS);
447 for (i = 0; i < 4; i++) {
448 ecc = this->read_word(this->base
449 + ((ONENAND_REG_ECC_STATUS + i) << 1));
452 if (ecc & FLEXONENAND_UNCORRECTABLE_ERROR)
453 return ONENAND_ECC_2BIT_ALL;
460 * onenand_wait - [DEFAULT] wait until the command is done
461 * @param mtd MTD device structure
462 * @param state state to select the max. timeout value
464 * Wait for command done. This applies to all OneNAND command
465 * Read can take up to 30us, erase up to 2ms and program up to 350us
466 * according to general OneNAND specs
468 static int onenand_wait(struct mtd_info *mtd, int state)
470 struct onenand_chip *this = mtd->priv;
471 unsigned int interrupt = 0;
474 /* Wait at most 20ms ... */
475 u32 timeo = (CONFIG_SYS_HZ * 20) / 1000;
476 u32 time_start = get_timer(0);
479 if (get_timer(time_start) > timeo)
481 interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
482 } while ((interrupt & ONENAND_INT_MASTER) == 0);
484 ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS);
486 if (interrupt & ONENAND_INT_READ) {
487 int ecc = onenand_read_ecc(this);
488 if (ecc & ONENAND_ECC_2BIT_ALL) {
489 printk("onenand_wait: ECC error = 0x%04x\n", ecc);
494 if (ctrl & ONENAND_CTRL_ERROR) {
495 printk("onenand_wait: controller error = 0x%04x\n", ctrl);
496 if (ctrl & ONENAND_CTRL_LOCK)
497 printk("onenand_wait: it's locked error = 0x%04x\n",
508 * onenand_bufferram_offset - [DEFAULT] BufferRAM offset
509 * @param mtd MTD data structure
510 * @param area BufferRAM area
511 * @return offset given area
513 * Return BufferRAM offset given area
515 static inline int onenand_bufferram_offset(struct mtd_info *mtd, int area)
517 struct onenand_chip *this = mtd->priv;
519 if (ONENAND_CURRENT_BUFFERRAM(this)) {
520 if (area == ONENAND_DATARAM)
521 return mtd->writesize;
522 if (area == ONENAND_SPARERAM)
530 * onenand_read_bufferram - [OneNAND Interface] Read the bufferram area
531 * @param mtd MTD data structure
532 * @param area BufferRAM area
533 * @param buffer the databuffer to put/get data
534 * @param offset offset to read from or write to
535 * @param count number of bytes to read/write
537 * Read the BufferRAM area
539 static int onenand_read_bufferram(struct mtd_info *mtd, loff_t addr, int area,
540 unsigned char *buffer, int offset,
543 struct onenand_chip *this = mtd->priv;
544 void __iomem *bufferram;
546 bufferram = this->base + area;
547 bufferram += onenand_bufferram_offset(mtd, area);
549 memcpy_16(buffer, bufferram + offset, count);
555 * onenand_sync_read_bufferram - [OneNAND Interface] Read the bufferram area with Sync. Burst mode
556 * @param mtd MTD data structure
557 * @param area BufferRAM area
558 * @param buffer the databuffer to put/get data
559 * @param offset offset to read from or write to
560 * @param count number of bytes to read/write
562 * Read the BufferRAM area with Sync. Burst Mode
564 static int onenand_sync_read_bufferram(struct mtd_info *mtd, loff_t addr, int area,
565 unsigned char *buffer, int offset,
568 struct onenand_chip *this = mtd->priv;
569 void __iomem *bufferram;
571 bufferram = this->base + area;
572 bufferram += onenand_bufferram_offset(mtd, area);
574 this->mmcontrol(mtd, ONENAND_SYS_CFG1_SYNC_READ);
576 memcpy_16(buffer, bufferram + offset, count);
578 this->mmcontrol(mtd, 0);
584 * onenand_write_bufferram - [OneNAND Interface] Write the bufferram area
585 * @param mtd MTD data structure
586 * @param area BufferRAM area
587 * @param buffer the databuffer to put/get data
588 * @param offset offset to read from or write to
589 * @param count number of bytes to read/write
591 * Write the BufferRAM area
593 static int onenand_write_bufferram(struct mtd_info *mtd, loff_t addr, int area,
594 const unsigned char *buffer, int offset,
597 struct onenand_chip *this = mtd->priv;
598 void __iomem *bufferram;
600 bufferram = this->base + area;
601 bufferram += onenand_bufferram_offset(mtd, area);
603 memcpy_16(bufferram + offset, buffer, count);
609 * onenand_get_2x_blockpage - [GENERIC] Get blockpage at 2x program mode
610 * @param mtd MTD data structure
611 * @param addr address to check
612 * @return blockpage address
614 * Get blockpage address at 2x program mode
616 static int onenand_get_2x_blockpage(struct mtd_info *mtd, loff_t addr)
618 struct onenand_chip *this = mtd->priv;
619 int blockpage, block, page;
621 /* Calculate the even block number */
622 block = (int) (addr >> this->erase_shift) & ~1;
623 /* Is it the odd plane? */
624 if (addr & this->writesize)
626 page = (int) (addr >> (this->page_shift + 1)) & this->page_mask;
627 blockpage = (block << 7) | page;
633 * onenand_check_bufferram - [GENERIC] Check BufferRAM information
634 * @param mtd MTD data structure
635 * @param addr address to check
636 * @return 1 if there are valid data, otherwise 0
638 * Check bufferram if there is data we required
640 static int onenand_check_bufferram(struct mtd_info *mtd, loff_t addr)
642 struct onenand_chip *this = mtd->priv;
643 int blockpage, found = 0;
646 if (ONENAND_IS_2PLANE(this))
647 blockpage = onenand_get_2x_blockpage(mtd, addr);
649 blockpage = (int) (addr >> this->page_shift);
651 /* Is there valid data? */
652 i = ONENAND_CURRENT_BUFFERRAM(this);
653 if (this->bufferram[i].blockpage == blockpage)
656 /* Check another BufferRAM */
657 i = ONENAND_NEXT_BUFFERRAM(this);
658 if (this->bufferram[i].blockpage == blockpage) {
659 ONENAND_SET_NEXT_BUFFERRAM(this);
664 if (found && ONENAND_IS_DDP(this)) {
665 /* Select DataRAM for DDP */
666 int block = onenand_block(this, addr);
667 int value = onenand_bufferram_address(this, block);
668 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
675 * onenand_update_bufferram - [GENERIC] Update BufferRAM information
676 * @param mtd MTD data structure
677 * @param addr address to update
678 * @param valid valid flag
680 * Update BufferRAM information
682 static int onenand_update_bufferram(struct mtd_info *mtd, loff_t addr,
685 struct onenand_chip *this = mtd->priv;
689 if (ONENAND_IS_2PLANE(this))
690 blockpage = onenand_get_2x_blockpage(mtd, addr);
692 blockpage = (int)(addr >> this->page_shift);
694 /* Invalidate another BufferRAM */
695 i = ONENAND_NEXT_BUFFERRAM(this);
696 if (this->bufferram[i].blockpage == blockpage)
697 this->bufferram[i].blockpage = -1;
699 /* Update BufferRAM */
700 i = ONENAND_CURRENT_BUFFERRAM(this);
702 this->bufferram[i].blockpage = blockpage;
704 this->bufferram[i].blockpage = -1;
710 * onenand_invalidate_bufferram - [GENERIC] Invalidate BufferRAM information
711 * @param mtd MTD data structure
712 * @param addr start address to invalidate
713 * @param len length to invalidate
715 * Invalidate BufferRAM information
717 static void onenand_invalidate_bufferram(struct mtd_info *mtd, loff_t addr,
720 struct onenand_chip *this = mtd->priv;
722 loff_t end_addr = addr + len;
724 /* Invalidate BufferRAM */
725 for (i = 0; i < MAX_BUFFERRAM; i++) {
726 loff_t buf_addr = this->bufferram[i].blockpage << this->page_shift;
728 if (buf_addr >= addr && buf_addr < end_addr)
729 this->bufferram[i].blockpage = -1;
734 * onenand_get_device - [GENERIC] Get chip for selected access
735 * @param mtd MTD device structure
736 * @param new_state the state which is requested
738 * Get the device and lock it for exclusive access
740 static void onenand_get_device(struct mtd_info *mtd, int new_state)
746 * onenand_release_device - [GENERIC] release chip
747 * @param mtd MTD device structure
749 * Deselect, release chip lock and wake up anyone waiting on the device
751 static void onenand_release_device(struct mtd_info *mtd)
757 * onenand_transfer_auto_oob - [INTERN] oob auto-placement transfer
758 * @param mtd MTD device structure
759 * @param buf destination address
760 * @param column oob offset to read from
761 * @param thislen oob length to read
763 static int onenand_transfer_auto_oob(struct mtd_info *mtd, uint8_t *buf,
764 int column, int thislen)
766 struct onenand_chip *this = mtd->priv;
767 struct nand_oobfree *free;
768 int readcol = column;
769 int readend = column + thislen;
772 uint8_t *oob_buf = this->oob_buf;
774 free = this->ecclayout->oobfree;
775 for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES_LARGE && free->length;
777 if (readcol >= lastgap)
778 readcol += free->offset - lastgap;
779 if (readend >= lastgap)
780 readend += free->offset - lastgap;
781 lastgap = free->offset + free->length;
783 this->read_bufferram(mtd, 0, ONENAND_SPARERAM, oob_buf, 0, mtd->oobsize);
784 free = this->ecclayout->oobfree;
785 for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES_LARGE && free->length;
787 int free_end = free->offset + free->length;
788 if (free->offset < readend && free_end > readcol) {
789 int st = max_t(int,free->offset,readcol);
790 int ed = min_t(int,free_end,readend);
792 memcpy(buf, oob_buf + st, n);
794 } else if (column == 0)
801 * onenand_recover_lsb - [Flex-OneNAND] Recover LSB page data
802 * @param mtd MTD device structure
803 * @param addr address to recover
804 * @param status return value from onenand_wait
806 * MLC NAND Flash cell has paired pages - LSB page and MSB page. LSB page has
807 * lower page address and MSB page has higher page address in paired pages.
808 * If power off occurs during MSB page program, the paired LSB page data can
809 * become corrupt. LSB page recovery read is a way to read LSB page though page
810 * data are corrupted. When uncorrectable error occurs as a result of LSB page
811 * read after power up, issue LSB page recovery read.
813 static int onenand_recover_lsb(struct mtd_info *mtd, loff_t addr, int status)
815 struct onenand_chip *this = mtd->priv;
818 /* Recovery is only for Flex-OneNAND */
819 if (!FLEXONENAND(this))
822 /* check if we failed due to uncorrectable error */
823 if (!mtd_is_eccerr(status) && status != ONENAND_BBT_READ_ECC_ERROR)
826 /* check if address lies in MLC region */
827 i = flexonenand_region(mtd, addr);
828 if (mtd->eraseregions[i].erasesize < (1 << this->erase_shift))
831 printk("onenand_recover_lsb:"
832 "Attempting to recover from uncorrectable read\n");
834 /* Issue the LSB page recovery command */
835 this->command(mtd, FLEXONENAND_CMD_RECOVER_LSB, addr, this->writesize);
836 return this->wait(mtd, FL_READING);
840 * onenand_read_ops_nolock - [OneNAND Interface] OneNAND read main and/or out-of-band
841 * @param mtd MTD device structure
842 * @param from offset to read from
843 * @param ops oob operation description structure
845 * OneNAND read main and/or out-of-band data
847 static int onenand_read_ops_nolock(struct mtd_info *mtd, loff_t from,
848 struct mtd_oob_ops *ops)
850 struct onenand_chip *this = mtd->priv;
851 struct mtd_ecc_stats stats;
852 size_t len = ops->len;
853 size_t ooblen = ops->ooblen;
854 u_char *buf = ops->datbuf;
855 u_char *oobbuf = ops->oobbuf;
856 int read = 0, column, thislen;
857 int oobread = 0, oobcolumn, thisooblen, oobsize;
858 int ret = 0, boundary = 0;
859 int writesize = this->writesize;
861 MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_read_ops_nolock: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
863 if (ops->mode == MTD_OPS_AUTO_OOB)
864 oobsize = this->ecclayout->oobavail;
866 oobsize = mtd->oobsize;
868 oobcolumn = from & (mtd->oobsize - 1);
870 /* Do not allow reads past end of device */
871 if ((from + len) > mtd->size) {
872 printk(KERN_ERR "onenand_read_ops_nolock: Attempt read beyond end of device\n");
878 stats = mtd->ecc_stats;
880 /* Read-while-load method */
881 /* Note: We can't use this feature in MLC */
883 /* Do first load to bufferRAM */
885 if (!onenand_check_bufferram(mtd, from)) {
886 this->main_buf = buf;
887 this->command(mtd, ONENAND_CMD_READ, from, writesize);
888 ret = this->wait(mtd, FL_READING);
890 ret = onenand_recover_lsb(mtd, from, ret);
891 onenand_update_bufferram(mtd, from, !ret);
897 thislen = min_t(int, writesize, len - read);
898 column = from & (writesize - 1);
899 if (column + thislen > writesize)
900 thislen = writesize - column;
903 /* If there is more to load then start next load */
905 if (!ONENAND_IS_4KB_PAGE(this) && read + thislen < len) {
906 this->main_buf = buf + thislen;
907 this->command(mtd, ONENAND_CMD_READ, from, writesize);
909 * Chip boundary handling in DDP
910 * Now we issued chip 1 read and pointed chip 1
911 * bufferam so we have to point chip 0 bufferam.
913 if (ONENAND_IS_DDP(this) &&
914 unlikely(from == (this->chipsize >> 1))) {
915 this->write_word(ONENAND_DDP_CHIP0, this->base + ONENAND_REG_START_ADDRESS2);
919 ONENAND_SET_PREV_BUFFERRAM(this);
922 /* While load is going, read from last bufferRAM */
923 this->read_bufferram(mtd, from - thislen, ONENAND_DATARAM, buf, column, thislen);
925 /* Read oob area if needed */
927 thisooblen = oobsize - oobcolumn;
928 thisooblen = min_t(int, thisooblen, ooblen - oobread);
930 if (ops->mode == MTD_OPS_AUTO_OOB)
931 onenand_transfer_auto_oob(mtd, oobbuf, oobcolumn, thisooblen);
933 this->read_bufferram(mtd, 0, ONENAND_SPARERAM, oobbuf, oobcolumn, thisooblen);
934 oobread += thisooblen;
935 oobbuf += thisooblen;
939 if (ONENAND_IS_4KB_PAGE(this) && (read + thislen < len)) {
940 this->command(mtd, ONENAND_CMD_READ, from, writesize);
941 ret = this->wait(mtd, FL_READING);
943 ret = onenand_recover_lsb(mtd, from, ret);
944 onenand_update_bufferram(mtd, from, !ret);
945 if (mtd_is_eccerr(ret))
949 /* See if we are done */
953 /* Set up for next read from bufferRAM */
954 if (unlikely(boundary))
955 this->write_word(ONENAND_DDP_CHIP1, this->base + ONENAND_REG_START_ADDRESS2);
956 if (!ONENAND_IS_4KB_PAGE(this))
957 ONENAND_SET_NEXT_BUFFERRAM(this);
959 thislen = min_t(int, writesize, len - read);
962 if (!ONENAND_IS_4KB_PAGE(this)) {
963 /* Now wait for load */
964 ret = this->wait(mtd, FL_READING);
965 onenand_update_bufferram(mtd, from, !ret);
966 if (mtd_is_eccerr(ret))
972 * Return success, if no ECC failures, else -EBADMSG
973 * fs driver will take care of that, because
974 * retlen == desired len and result == -EBADMSG
977 ops->oobretlen = oobread;
982 if (mtd->ecc_stats.failed - stats.failed)
985 /* return max bitflips per ecc step; ONENANDs correct 1 bit only */
986 return mtd->ecc_stats.corrected != stats.corrected ? 1 : 0;
990 * onenand_read_oob_nolock - [MTD Interface] OneNAND read out-of-band
991 * @param mtd MTD device structure
992 * @param from offset to read from
993 * @param ops oob operation description structure
995 * OneNAND read out-of-band data from the spare area
997 static int onenand_read_oob_nolock(struct mtd_info *mtd, loff_t from,
998 struct mtd_oob_ops *ops)
1000 struct onenand_chip *this = mtd->priv;
1001 struct mtd_ecc_stats stats;
1002 int read = 0, thislen, column, oobsize;
1003 size_t len = ops->ooblen;
1004 unsigned int mode = ops->mode;
1005 u_char *buf = ops->oobbuf;
1006 int ret = 0, readcmd;
1008 from += ops->ooboffs;
1010 MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_read_oob_nolock: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
1012 /* Initialize return length value */
1015 if (mode == MTD_OPS_AUTO_OOB)
1016 oobsize = this->ecclayout->oobavail;
1018 oobsize = mtd->oobsize;
1020 column = from & (mtd->oobsize - 1);
1022 if (unlikely(column >= oobsize)) {
1023 printk(KERN_ERR "onenand_read_oob_nolock: Attempted to start read outside oob\n");
1027 /* Do not allow reads past end of device */
1028 if (unlikely(from >= mtd->size ||
1029 column + len > ((mtd->size >> this->page_shift) -
1030 (from >> this->page_shift)) * oobsize)) {
1031 printk(KERN_ERR "onenand_read_oob_nolock: Attempted to read beyond end of device\n");
1035 stats = mtd->ecc_stats;
1037 readcmd = ONENAND_IS_4KB_PAGE(this) ?
1038 ONENAND_CMD_READ : ONENAND_CMD_READOOB;
1040 while (read < len) {
1041 thislen = oobsize - column;
1042 thislen = min_t(int, thislen, len);
1044 this->spare_buf = buf;
1045 this->command(mtd, readcmd, from, mtd->oobsize);
1047 onenand_update_bufferram(mtd, from, 0);
1049 ret = this->wait(mtd, FL_READING);
1051 ret = onenand_recover_lsb(mtd, from, ret);
1053 if (ret && ret != -EBADMSG) {
1054 printk(KERN_ERR "onenand_read_oob_nolock: read failed = 0x%x\n", ret);
1058 if (mode == MTD_OPS_AUTO_OOB)
1059 onenand_transfer_auto_oob(mtd, buf, column, thislen);
1061 this->read_bufferram(mtd, 0, ONENAND_SPARERAM, buf, column, thislen);
1073 from += mtd->writesize;
1078 ops->oobretlen = read;
1083 if (mtd->ecc_stats.failed - stats.failed)
1090 * onenand_read - [MTD Interface] MTD compability function for onenand_read_ecc
1091 * @param mtd MTD device structure
1092 * @param from offset to read from
1093 * @param len number of bytes to read
1094 * @param retlen pointer to variable to store the number of read bytes
1095 * @param buf the databuffer to put data
1097 * This function simply calls onenand_read_ecc with oob buffer and oobsel = NULL
1099 int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
1100 size_t * retlen, u_char * buf)
1102 struct mtd_oob_ops ops = {
1110 onenand_get_device(mtd, FL_READING);
1111 ret = onenand_read_ops_nolock(mtd, from, &ops);
1112 onenand_release_device(mtd);
1114 *retlen = ops.retlen;
1119 * onenand_read_oob - [MTD Interface] OneNAND read out-of-band
1120 * @param mtd MTD device structure
1121 * @param from offset to read from
1122 * @param ops oob operations description structure
1124 * OneNAND main and/or out-of-band
1126 int onenand_read_oob(struct mtd_info *mtd, loff_t from,
1127 struct mtd_oob_ops *ops)
1131 switch (ops->mode) {
1132 case MTD_OPS_PLACE_OOB:
1133 case MTD_OPS_AUTO_OOB:
1136 /* Not implemented yet */
1141 onenand_get_device(mtd, FL_READING);
1143 ret = onenand_read_ops_nolock(mtd, from, ops);
1145 ret = onenand_read_oob_nolock(mtd, from, ops);
1146 onenand_release_device(mtd);
1152 * onenand_bbt_wait - [DEFAULT] wait until the command is done
1153 * @param mtd MTD device structure
1154 * @param state state to select the max. timeout value
1156 * Wait for command done.
1158 static int onenand_bbt_wait(struct mtd_info *mtd, int state)
1160 struct onenand_chip *this = mtd->priv;
1161 unsigned int interrupt;
1164 /* Wait at most 20ms ... */
1165 u32 timeo = (CONFIG_SYS_HZ * 20) / 1000;
1166 u32 time_start = get_timer(0);
1169 if (get_timer(time_start) > timeo)
1170 return ONENAND_BBT_READ_FATAL_ERROR;
1171 interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
1172 } while ((interrupt & ONENAND_INT_MASTER) == 0);
1174 /* To get correct interrupt status in timeout case */
1175 interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
1176 ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS);
1178 if (interrupt & ONENAND_INT_READ) {
1179 int ecc = onenand_read_ecc(this);
1180 if (ecc & ONENAND_ECC_2BIT_ALL) {
1181 printk(KERN_INFO "onenand_bbt_wait: ecc error = 0x%04x"
1182 ", controller = 0x%04x\n", ecc, ctrl);
1183 return ONENAND_BBT_READ_ERROR;
1186 printk(KERN_ERR "onenand_bbt_wait: read timeout!"
1187 "ctrl=0x%04x intr=0x%04x\n", ctrl, interrupt);
1188 return ONENAND_BBT_READ_FATAL_ERROR;
1191 /* Initial bad block case: 0x2400 or 0x0400 */
1192 if (ctrl & ONENAND_CTRL_ERROR) {
1193 printk(KERN_DEBUG "onenand_bbt_wait: controller error = 0x%04x\n", ctrl);
1194 return ONENAND_BBT_READ_ERROR;
1201 * onenand_bbt_read_oob - [MTD Interface] OneNAND read out-of-band for bbt scan
1202 * @param mtd MTD device structure
1203 * @param from offset to read from
1204 * @param ops oob operation description structure
1206 * OneNAND read out-of-band data from the spare area for bbt scan
1208 int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
1209 struct mtd_oob_ops *ops)
1211 struct onenand_chip *this = mtd->priv;
1212 int read = 0, thislen, column;
1213 int ret = 0, readcmd;
1214 size_t len = ops->ooblen;
1215 u_char *buf = ops->oobbuf;
1217 MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_bbt_read_oob: from = 0x%08x, len = %zi\n", (unsigned int) from, len);
1219 readcmd = ONENAND_IS_4KB_PAGE(this) ?
1220 ONENAND_CMD_READ : ONENAND_CMD_READOOB;
1222 /* Initialize return value */
1225 /* Do not allow reads past end of device */
1226 if (unlikely((from + len) > mtd->size)) {
1227 printk(KERN_ERR "onenand_bbt_read_oob: Attempt read beyond end of device\n");
1228 return ONENAND_BBT_READ_FATAL_ERROR;
1231 /* Grab the lock and see if the device is available */
1232 onenand_get_device(mtd, FL_READING);
1234 column = from & (mtd->oobsize - 1);
1236 while (read < len) {
1238 thislen = mtd->oobsize - column;
1239 thislen = min_t(int, thislen, len);
1241 this->spare_buf = buf;
1242 this->command(mtd, readcmd, from, mtd->oobsize);
1244 onenand_update_bufferram(mtd, from, 0);
1246 ret = this->bbt_wait(mtd, FL_READING);
1248 ret = onenand_recover_lsb(mtd, from, ret);
1253 this->read_bufferram(mtd, 0, ONENAND_SPARERAM, buf, column, thislen);
1262 /* Update Page size */
1263 from += this->writesize;
1268 /* Deselect and wake up anyone waiting on the device */
1269 onenand_release_device(mtd);
1271 ops->oobretlen = read;
1276 #ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE
1278 * onenand_verify_oob - [GENERIC] verify the oob contents after a write
1279 * @param mtd MTD device structure
1280 * @param buf the databuffer to verify
1281 * @param to offset to read from
1283 static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to)
1285 struct onenand_chip *this = mtd->priv;
1286 u_char *oob_buf = this->oob_buf;
1287 int status, i, readcmd;
1289 readcmd = ONENAND_IS_4KB_PAGE(this) ?
1290 ONENAND_CMD_READ : ONENAND_CMD_READOOB;
1292 this->command(mtd, readcmd, to, mtd->oobsize);
1293 onenand_update_bufferram(mtd, to, 0);
1294 status = this->wait(mtd, FL_READING);
1298 this->read_bufferram(mtd, 0, ONENAND_SPARERAM, oob_buf, 0, mtd->oobsize);
1299 for (i = 0; i < mtd->oobsize; i++)
1300 if (buf[i] != 0xFF && buf[i] != oob_buf[i])
1307 * onenand_verify - [GENERIC] verify the chip contents after a write
1308 * @param mtd MTD device structure
1309 * @param buf the databuffer to verify
1310 * @param addr offset to read from
1311 * @param len number of bytes to read and compare
1313 static int onenand_verify(struct mtd_info *mtd, const u_char *buf, loff_t addr, size_t len)
1315 struct onenand_chip *this = mtd->priv;
1316 void __iomem *dataram;
1318 int thislen, column;
1321 thislen = min_t(int, this->writesize, len);
1322 column = addr & (this->writesize - 1);
1323 if (column + thislen > this->writesize)
1324 thislen = this->writesize - column;
1326 this->command(mtd, ONENAND_CMD_READ, addr, this->writesize);
1328 onenand_update_bufferram(mtd, addr, 0);
1330 ret = this->wait(mtd, FL_READING);
1334 onenand_update_bufferram(mtd, addr, 1);
1336 dataram = this->base + ONENAND_DATARAM;
1337 dataram += onenand_bufferram_offset(mtd, ONENAND_DATARAM);
1339 if (memcmp(buf, dataram + column, thislen))
1350 #define onenand_verify(...) (0)
1351 #define onenand_verify_oob(...) (0)
1354 #define NOTALIGNED(x) ((x & (this->subpagesize - 1)) != 0)
1357 * onenand_fill_auto_oob - [INTERN] oob auto-placement transfer
1358 * @param mtd MTD device structure
1359 * @param oob_buf oob buffer
1360 * @param buf source address
1361 * @param column oob offset to write to
1362 * @param thislen oob length to write
1364 static int onenand_fill_auto_oob(struct mtd_info *mtd, u_char *oob_buf,
1365 const u_char *buf, int column, int thislen)
1367 struct onenand_chip *this = mtd->priv;
1368 struct nand_oobfree *free;
1369 int writecol = column;
1370 int writeend = column + thislen;
1374 free = this->ecclayout->oobfree;
1375 for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES_LARGE && free->length;
1377 if (writecol >= lastgap)
1378 writecol += free->offset - lastgap;
1379 if (writeend >= lastgap)
1380 writeend += free->offset - lastgap;
1381 lastgap = free->offset + free->length;
1383 free = this->ecclayout->oobfree;
1384 for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES_LARGE && free->length;
1386 int free_end = free->offset + free->length;
1387 if (free->offset < writeend && free_end > writecol) {
1388 int st = max_t(int,free->offset,writecol);
1389 int ed = min_t(int,free_end,writeend);
1391 memcpy(oob_buf + st, buf, n);
1393 } else if (column == 0)
1400 * onenand_write_ops_nolock - [OneNAND Interface] write main and/or out-of-band
1401 * @param mtd MTD device structure
1402 * @param to offset to write to
1403 * @param ops oob operation description structure
1405 * Write main and/or oob with ECC
1407 static int onenand_write_ops_nolock(struct mtd_info *mtd, loff_t to,
1408 struct mtd_oob_ops *ops)
1410 struct onenand_chip *this = mtd->priv;
1411 int written = 0, column, thislen, subpage;
1412 int oobwritten = 0, oobcolumn, thisooblen, oobsize;
1413 size_t len = ops->len;
1414 size_t ooblen = ops->ooblen;
1415 const u_char *buf = ops->datbuf;
1416 const u_char *oob = ops->oobbuf;
1420 MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_write_ops_nolock: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
1422 /* Initialize retlen, in case of early exit */
1426 /* Reject writes, which are not page aligned */
1427 if (unlikely(NOTALIGNED(to) || NOTALIGNED(len))) {
1428 printk(KERN_ERR "onenand_write_ops_nolock: Attempt to write not page aligned data\n");
1432 if (ops->mode == MTD_OPS_AUTO_OOB)
1433 oobsize = this->ecclayout->oobavail;
1435 oobsize = mtd->oobsize;
1437 oobcolumn = to & (mtd->oobsize - 1);
1439 column = to & (mtd->writesize - 1);
1441 /* Loop until all data write */
1442 while (written < len) {
1443 u_char *wbuf = (u_char *) buf;
1445 thislen = min_t(int, mtd->writesize - column, len - written);
1446 thisooblen = min_t(int, oobsize - oobcolumn, ooblen - oobwritten);
1448 this->command(mtd, ONENAND_CMD_BUFFERRAM, to, thislen);
1450 /* Partial page write */
1451 subpage = thislen < mtd->writesize;
1453 memset(this->page_buf, 0xff, mtd->writesize);
1454 memcpy(this->page_buf + column, buf, thislen);
1455 wbuf = this->page_buf;
1458 this->write_bufferram(mtd, to, ONENAND_DATARAM, wbuf, 0, mtd->writesize);
1461 oobbuf = this->oob_buf;
1463 /* We send data to spare ram with oobsize
1464 * * to prevent byte access */
1465 memset(oobbuf, 0xff, mtd->oobsize);
1466 if (ops->mode == MTD_OPS_AUTO_OOB)
1467 onenand_fill_auto_oob(mtd, oobbuf, oob, oobcolumn, thisooblen);
1469 memcpy(oobbuf + oobcolumn, oob, thisooblen);
1471 oobwritten += thisooblen;
1475 oobbuf = (u_char *) ffchars;
1477 this->write_bufferram(mtd, 0, ONENAND_SPARERAM, oobbuf, 0, mtd->oobsize);
1479 this->command(mtd, ONENAND_CMD_PROG, to, mtd->writesize);
1481 ret = this->wait(mtd, FL_WRITING);
1483 /* In partial page write we don't update bufferram */
1484 onenand_update_bufferram(mtd, to, !ret && !subpage);
1485 if (ONENAND_IS_2PLANE(this)) {
1486 ONENAND_SET_BUFFERRAM1(this);
1487 onenand_update_bufferram(mtd, to + this->writesize, !ret && !subpage);
1491 printk(KERN_ERR "onenand_write_ops_nolock: write filaed %d\n", ret);
1495 /* Only check verify write turn on */
1496 ret = onenand_verify(mtd, buf, to, thislen);
1498 printk(KERN_ERR "onenand_write_ops_nolock: verify failed %d\n", ret);
1512 ops->retlen = written;
1518 * onenand_write_oob_nolock - [INTERN] OneNAND write out-of-band
1519 * @param mtd MTD device structure
1520 * @param to offset to write to
1521 * @param len number of bytes to write
1522 * @param retlen pointer to variable to store the number of written bytes
1523 * @param buf the data to write
1524 * @param mode operation mode
1526 * OneNAND write out-of-band
1528 static int onenand_write_oob_nolock(struct mtd_info *mtd, loff_t to,
1529 struct mtd_oob_ops *ops)
1531 struct onenand_chip *this = mtd->priv;
1532 int column, ret = 0, oobsize;
1533 int written = 0, oobcmd;
1535 size_t len = ops->ooblen;
1536 const u_char *buf = ops->oobbuf;
1537 unsigned int mode = ops->mode;
1541 MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_write_oob_nolock: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
1543 /* Initialize retlen, in case of early exit */
1546 if (mode == MTD_OPS_AUTO_OOB)
1547 oobsize = this->ecclayout->oobavail;
1549 oobsize = mtd->oobsize;
1551 column = to & (mtd->oobsize - 1);
1553 if (unlikely(column >= oobsize)) {
1554 printk(KERN_ERR "onenand_write_oob_nolock: Attempted to start write outside oob\n");
1558 /* For compatibility with NAND: Do not allow write past end of page */
1559 if (unlikely(column + len > oobsize)) {
1560 printk(KERN_ERR "onenand_write_oob_nolock: "
1561 "Attempt to write past end of page\n");
1565 /* Do not allow reads past end of device */
1566 if (unlikely(to >= mtd->size ||
1567 column + len > ((mtd->size >> this->page_shift) -
1568 (to >> this->page_shift)) * oobsize)) {
1569 printk(KERN_ERR "onenand_write_oob_nolock: Attempted to write past end of device\n");
1573 oobbuf = this->oob_buf;
1575 oobcmd = ONENAND_IS_4KB_PAGE(this) ?
1576 ONENAND_CMD_PROG : ONENAND_CMD_PROGOOB;
1578 /* Loop until all data write */
1579 while (written < len) {
1580 int thislen = min_t(int, oobsize, len - written);
1582 this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->oobsize);
1584 /* We send data to spare ram with oobsize
1585 * to prevent byte access */
1586 memset(oobbuf, 0xff, mtd->oobsize);
1587 if (mode == MTD_OPS_AUTO_OOB)
1588 onenand_fill_auto_oob(mtd, oobbuf, buf, column, thislen);
1590 memcpy(oobbuf + column, buf, thislen);
1591 this->write_bufferram(mtd, 0, ONENAND_SPARERAM, oobbuf, 0, mtd->oobsize);
1593 if (ONENAND_IS_4KB_PAGE(this)) {
1594 /* Set main area of DataRAM to 0xff*/
1595 memset(this->page_buf, 0xff, mtd->writesize);
1596 this->write_bufferram(mtd, 0, ONENAND_DATARAM,
1597 this->page_buf, 0, mtd->writesize);
1600 this->command(mtd, oobcmd, to, mtd->oobsize);
1602 onenand_update_bufferram(mtd, to, 0);
1603 if (ONENAND_IS_2PLANE(this)) {
1604 ONENAND_SET_BUFFERRAM1(this);
1605 onenand_update_bufferram(mtd, to + this->writesize, 0);
1608 ret = this->wait(mtd, FL_WRITING);
1610 printk(KERN_ERR "onenand_write_oob_nolock: write failed %d\n", ret);
1614 ret = onenand_verify_oob(mtd, oobbuf, to);
1616 printk(KERN_ERR "onenand_write_oob_nolock: verify failed %d\n", ret);
1624 to += mtd->writesize;
1629 ops->oobretlen = written;
1635 * onenand_write - [MTD Interface] compability function for onenand_write_ecc
1636 * @param mtd MTD device structure
1637 * @param to offset to write to
1638 * @param len number of bytes to write
1639 * @param retlen pointer to variable to store the number of written bytes
1640 * @param buf the data to write
1644 int onenand_write(struct mtd_info *mtd, loff_t to, size_t len,
1645 size_t * retlen, const u_char * buf)
1647 struct mtd_oob_ops ops = {
1650 .datbuf = (u_char *) buf,
1655 onenand_get_device(mtd, FL_WRITING);
1656 ret = onenand_write_ops_nolock(mtd, to, &ops);
1657 onenand_release_device(mtd);
1659 *retlen = ops.retlen;
1664 * onenand_write_oob - [MTD Interface] OneNAND write out-of-band
1665 * @param mtd MTD device structure
1666 * @param to offset to write to
1667 * @param ops oob operation description structure
1669 * OneNAND write main and/or out-of-band
1671 int onenand_write_oob(struct mtd_info *mtd, loff_t to,
1672 struct mtd_oob_ops *ops)
1676 switch (ops->mode) {
1677 case MTD_OPS_PLACE_OOB:
1678 case MTD_OPS_AUTO_OOB:
1681 /* Not implemented yet */
1686 onenand_get_device(mtd, FL_WRITING);
1688 ret = onenand_write_ops_nolock(mtd, to, ops);
1690 ret = onenand_write_oob_nolock(mtd, to, ops);
1691 onenand_release_device(mtd);
1698 * onenand_block_isbad_nolock - [GENERIC] Check if a block is marked bad
1699 * @param mtd MTD device structure
1700 * @param ofs offset from device start
1701 * @param allowbbt 1, if its allowed to access the bbt area
1703 * Check, if the block is bad, Either by reading the bad block table or
1704 * calling of the scan function.
1706 static int onenand_block_isbad_nolock(struct mtd_info *mtd, loff_t ofs, int allowbbt)
1708 struct onenand_chip *this = mtd->priv;
1709 struct bbm_info *bbm = this->bbm;
1711 /* Return info from the table */
1712 return bbm->isbad_bbt(mtd, ofs, allowbbt);
1717 * onenand_erase - [MTD Interface] erase block(s)
1718 * @param mtd MTD device structure
1719 * @param instr erase instruction
1721 * Erase one ore more blocks
1723 int onenand_erase(struct mtd_info *mtd, struct erase_info *instr)
1725 struct onenand_chip *this = mtd->priv;
1726 unsigned int block_size;
1727 loff_t addr = instr->addr;
1728 unsigned int len = instr->len;
1730 struct mtd_erase_region_info *region = NULL;
1731 unsigned int region_end = 0;
1733 MTDDEBUG(MTD_DEBUG_LEVEL3, "onenand_erase: start = 0x%08x, len = %i\n",
1734 (unsigned int) addr, len);
1736 if (FLEXONENAND(this)) {
1737 /* Find the eraseregion of this address */
1738 i = flexonenand_region(mtd, addr);
1739 region = &mtd->eraseregions[i];
1741 block_size = region->erasesize;
1742 region_end = region->offset
1743 + region->erasesize * region->numblocks;
1745 /* Start address within region must align on block boundary.
1746 * Erase region's start offset is always block start address.
1748 if (unlikely((addr - region->offset) & (block_size - 1))) {
1749 MTDDEBUG(MTD_DEBUG_LEVEL0, "onenand_erase:"
1750 " Unaligned address\n");
1754 block_size = 1 << this->erase_shift;
1756 /* Start address must align on block boundary */
1757 if (unlikely(addr & (block_size - 1))) {
1758 MTDDEBUG(MTD_DEBUG_LEVEL0, "onenand_erase:"
1759 "Unaligned address\n");
1764 /* Length must align on block boundary */
1765 if (unlikely(len & (block_size - 1))) {
1766 MTDDEBUG (MTD_DEBUG_LEVEL0,
1767 "onenand_erase: Length not block aligned\n");
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_OPS_PLACE_OOB,
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)
1924 ret = onenand_block_isbad(mtd, ofs);
1926 /* If it was bad already, return success and do nothing */
1932 ret = mtd_block_markbad(mtd, ofs);
1937 * onenand_do_lock_cmd - [OneNAND Interface] Lock or unlock block(s)
1938 * @param mtd MTD device structure
1939 * @param ofs offset relative to mtd start
1940 * @param len number of bytes to lock or unlock
1941 * @param cmd lock or unlock command
1943 * Lock or unlock one or more blocks
1945 static int onenand_do_lock_cmd(struct mtd_info *mtd, loff_t ofs, size_t len, int cmd)
1947 struct onenand_chip *this = mtd->priv;
1948 int start, end, block, value, status;
1950 start = onenand_block(this, ofs);
1951 end = onenand_block(this, ofs + len);
1953 /* Continuous lock scheme */
1954 if (this->options & ONENAND_HAS_CONT_LOCK) {
1955 /* Set start block address */
1956 this->write_word(start,
1957 this->base + ONENAND_REG_START_BLOCK_ADDRESS);
1958 /* Set end block address */
1959 this->write_word(end - 1,
1960 this->base + ONENAND_REG_END_BLOCK_ADDRESS);
1961 /* Write unlock command */
1962 this->command(mtd, cmd, 0, 0);
1964 /* There's no return value */
1965 this->wait(mtd, FL_UNLOCKING);
1968 while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
1969 & ONENAND_CTRL_ONGO)
1972 /* Check lock status */
1973 status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
1974 if (!(status & ONENAND_WP_US))
1975 printk(KERN_ERR "wp status = 0x%x\n", status);
1980 /* Block lock scheme */
1981 for (block = start; block < end; block++) {
1982 /* Set block address */
1983 value = onenand_block_address(this, block);
1984 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
1985 /* Select DataRAM for DDP */
1986 value = onenand_bufferram_address(this, block);
1987 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
1989 /* Set start block address */
1990 this->write_word(block,
1991 this->base + ONENAND_REG_START_BLOCK_ADDRESS);
1992 /* Write unlock command */
1993 this->command(mtd, ONENAND_CMD_UNLOCK, 0, 0);
1995 /* There's no return value */
1996 this->wait(mtd, FL_UNLOCKING);
1999 while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
2000 & ONENAND_CTRL_ONGO)
2003 /* Check lock status */
2004 status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
2005 if (!(status & ONENAND_WP_US))
2006 printk(KERN_ERR "block = %d, wp status = 0x%x\n",
2013 #ifdef ONENAND_LINUX
2015 * onenand_lock - [MTD Interface] Lock 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 * Lock one or more blocks
2022 static int onenand_lock(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_LOCK);
2028 onenand_release_device(mtd);
2033 * onenand_unlock - [MTD Interface] Unlock block(s)
2034 * @param mtd MTD device structure
2035 * @param ofs offset relative to mtd start
2036 * @param len number of bytes to unlock
2038 * Unlock one or more blocks
2040 static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
2044 onenand_get_device(mtd, FL_LOCKING);
2045 ret = onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK);
2046 onenand_release_device(mtd);
2052 * onenand_check_lock_status - [OneNAND Interface] Check lock status
2053 * @param this onenand chip data structure
2057 static int onenand_check_lock_status(struct onenand_chip *this)
2059 unsigned int value, block, status;
2062 end = this->chipsize >> this->erase_shift;
2063 for (block = 0; block < end; block++) {
2064 /* Set block address */
2065 value = onenand_block_address(this, block);
2066 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
2067 /* Select DataRAM for DDP */
2068 value = onenand_bufferram_address(this, block);
2069 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
2070 /* Set start block address */
2071 this->write_word(block, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
2073 /* Check lock status */
2074 status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
2075 if (!(status & ONENAND_WP_US)) {
2076 printk(KERN_ERR "block = %d, wp status = 0x%x\n", block, status);
2085 * onenand_unlock_all - [OneNAND Interface] unlock all blocks
2086 * @param mtd MTD device structure
2090 static void onenand_unlock_all(struct mtd_info *mtd)
2092 struct onenand_chip *this = mtd->priv;
2094 size_t len = mtd->size;
2096 if (this->options & ONENAND_HAS_UNLOCK_ALL) {
2097 /* Set start block address */
2098 this->write_word(0, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
2099 /* Write unlock command */
2100 this->command(mtd, ONENAND_CMD_UNLOCK_ALL, 0, 0);
2102 /* There's no return value */
2103 this->wait(mtd, FL_LOCKING);
2106 while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
2107 & ONENAND_CTRL_ONGO)
2110 /* Check lock status */
2111 if (onenand_check_lock_status(this))
2114 /* Workaround for all block unlock in DDP */
2115 if (ONENAND_IS_DDP(this) && !FLEXONENAND(this)) {
2116 /* All blocks on another chip */
2117 ofs = this->chipsize >> 1;
2118 len = this->chipsize >> 1;
2122 onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK);
2127 * onenand_check_features - Check and set OneNAND features
2128 * @param mtd MTD data structure
2130 * Check and set OneNAND features
2134 static void onenand_check_features(struct mtd_info *mtd)
2136 struct onenand_chip *this = mtd->priv;
2137 unsigned int density, process;
2139 /* Lock scheme depends on density and process */
2140 density = onenand_get_density(this->device_id);
2141 process = this->version_id >> ONENAND_VERSION_PROCESS_SHIFT;
2145 case ONENAND_DEVICE_DENSITY_4Gb:
2146 if (ONENAND_IS_DDP(this))
2147 this->options |= ONENAND_HAS_2PLANE;
2149 this->options |= ONENAND_HAS_4KB_PAGE;
2151 case ONENAND_DEVICE_DENSITY_2Gb:
2152 /* 2Gb DDP don't have 2 plane */
2153 if (!ONENAND_IS_DDP(this))
2154 this->options |= ONENAND_HAS_2PLANE;
2155 this->options |= ONENAND_HAS_UNLOCK_ALL;
2157 case ONENAND_DEVICE_DENSITY_1Gb:
2158 /* A-Die has all block unlock */
2160 this->options |= ONENAND_HAS_UNLOCK_ALL;
2164 /* Some OneNAND has continuous lock scheme */
2166 this->options |= ONENAND_HAS_CONT_LOCK;
2170 if (ONENAND_IS_MLC(this))
2171 this->options |= ONENAND_HAS_4KB_PAGE;
2173 if (ONENAND_IS_4KB_PAGE(this))
2174 this->options &= ~ONENAND_HAS_2PLANE;
2176 if (FLEXONENAND(this)) {
2177 this->options &= ~ONENAND_HAS_CONT_LOCK;
2178 this->options |= ONENAND_HAS_UNLOCK_ALL;
2181 if (this->options & ONENAND_HAS_CONT_LOCK)
2182 printk(KERN_DEBUG "Lock scheme is Continuous Lock\n");
2183 if (this->options & ONENAND_HAS_UNLOCK_ALL)
2184 printk(KERN_DEBUG "Chip support all block unlock\n");
2185 if (this->options & ONENAND_HAS_2PLANE)
2186 printk(KERN_DEBUG "Chip has 2 plane\n");
2187 if (this->options & ONENAND_HAS_4KB_PAGE)
2188 printk(KERN_DEBUG "Chip has 4KiB pagesize\n");
2193 * onenand_print_device_info - Print device ID
2194 * @param device device ID
2198 char *onenand_print_device_info(int device, int version)
2200 int vcc, demuxed, ddp, density, flexonenand;
2201 char *dev_info = malloc(80);
2204 vcc = device & ONENAND_DEVICE_VCC_MASK;
2205 demuxed = device & ONENAND_DEVICE_IS_DEMUX;
2206 ddp = device & ONENAND_DEVICE_IS_DDP;
2207 density = onenand_get_density(device);
2208 flexonenand = device & DEVICE_IS_FLEXONENAND;
2209 p += sprintf(dev_info, "%s%sOneNAND%s %dMB %sV 16-bit (0x%02x)",
2210 demuxed ? "" : "Muxed ",
2211 flexonenand ? "Flex-" : "",
2213 (16 << density), vcc ? "2.65/3.3" : "1.8", device);
2215 sprintf(p, "\nOneNAND version = 0x%04x", version);
2216 printk("%s\n", dev_info);
2221 static const struct onenand_manufacturers onenand_manuf_ids[] = {
2222 {ONENAND_MFR_NUMONYX, "Numonyx"},
2223 {ONENAND_MFR_SAMSUNG, "Samsung"},
2227 * onenand_check_maf - Check manufacturer ID
2228 * @param manuf manufacturer ID
2230 * Check manufacturer ID
2232 static int onenand_check_maf(int manuf)
2234 int size = ARRAY_SIZE(onenand_manuf_ids);
2236 #ifdef ONENAND_DEBUG
2240 for (i = 0; i < size; i++)
2241 if (manuf == onenand_manuf_ids[i].id)
2244 #ifdef ONENAND_DEBUG
2246 name = onenand_manuf_ids[i].name;
2250 printk(KERN_DEBUG "OneNAND Manufacturer: %s (0x%0x)\n", name, manuf);
2257 * flexonenand_get_boundary - Reads the SLC boundary
2258 * @param onenand_info - onenand info structure
2260 * Fill up boundary[] field in onenand_chip
2262 static int flexonenand_get_boundary(struct mtd_info *mtd)
2264 struct onenand_chip *this = mtd->priv;
2265 unsigned int die, bdry;
2269 syscfg = this->read_word(this->base + ONENAND_REG_SYS_CFG1);
2270 this->write_word((syscfg | 0x0100), this->base + ONENAND_REG_SYS_CFG1);
2272 for (die = 0; die < this->dies; die++) {
2273 this->command(mtd, FLEXONENAND_CMD_PI_ACCESS, die, 0);
2274 this->wait(mtd, FL_SYNCING);
2276 this->command(mtd, FLEXONENAND_CMD_READ_PI, die, 0);
2277 this->wait(mtd, FL_READING);
2279 bdry = this->read_word(this->base + ONENAND_DATARAM);
2280 if ((bdry >> FLEXONENAND_PI_UNLOCK_SHIFT) == 3)
2284 this->boundary[die] = bdry & FLEXONENAND_PI_MASK;
2286 this->command(mtd, ONENAND_CMD_RESET, 0, 0);
2287 this->wait(mtd, FL_RESETING);
2289 printk(KERN_INFO "Die %d boundary: %d%s\n", die,
2290 this->boundary[die], locked ? "(Locked)" : "(Unlocked)");
2294 this->write_word(syscfg, this->base + ONENAND_REG_SYS_CFG1);
2299 * flexonenand_get_size - Fill up fields in onenand_chip and mtd_info
2300 * boundary[], diesize[], mtd->size, mtd->erasesize,
2302 * @param mtd - MTD device structure
2304 static void flexonenand_get_size(struct mtd_info *mtd)
2306 struct onenand_chip *this = mtd->priv;
2307 int die, i, eraseshift, density;
2308 int blksperdie, maxbdry;
2311 density = onenand_get_density(this->device_id);
2312 blksperdie = ((loff_t)(16 << density) << 20) >> (this->erase_shift);
2313 blksperdie >>= ONENAND_IS_DDP(this) ? 1 : 0;
2314 maxbdry = blksperdie - 1;
2315 eraseshift = this->erase_shift - 1;
2317 mtd->numeraseregions = this->dies << 1;
2319 /* This fills up the device boundary */
2320 flexonenand_get_boundary(mtd);
2324 for (; die < this->dies; die++) {
2325 if (!die || this->boundary[die-1] != maxbdry) {
2327 mtd->eraseregions[i].offset = ofs;
2328 mtd->eraseregions[i].erasesize = 1 << eraseshift;
2329 mtd->eraseregions[i].numblocks =
2330 this->boundary[die] + 1;
2331 ofs += mtd->eraseregions[i].numblocks << eraseshift;
2334 mtd->numeraseregions -= 1;
2335 mtd->eraseregions[i].numblocks +=
2336 this->boundary[die] + 1;
2337 ofs += (this->boundary[die] + 1) << (eraseshift - 1);
2339 if (this->boundary[die] != maxbdry) {
2341 mtd->eraseregions[i].offset = ofs;
2342 mtd->eraseregions[i].erasesize = 1 << eraseshift;
2343 mtd->eraseregions[i].numblocks = maxbdry ^
2344 this->boundary[die];
2345 ofs += mtd->eraseregions[i].numblocks << eraseshift;
2348 mtd->numeraseregions -= 1;
2351 /* Expose MLC erase size except when all blocks are SLC */
2352 mtd->erasesize = 1 << this->erase_shift;
2353 if (mtd->numeraseregions == 1)
2354 mtd->erasesize >>= 1;
2356 printk(KERN_INFO "Device has %d eraseregions\n", mtd->numeraseregions);
2357 for (i = 0; i < mtd->numeraseregions; i++)
2358 printk(KERN_INFO "[offset: 0x%08llx, erasesize: 0x%05x,"
2359 " numblocks: %04u]\n", mtd->eraseregions[i].offset,
2360 mtd->eraseregions[i].erasesize,
2361 mtd->eraseregions[i].numblocks);
2363 for (die = 0, mtd->size = 0; die < this->dies; die++) {
2364 this->diesize[die] = (loff_t) (blksperdie << this->erase_shift);
2365 this->diesize[die] -= (loff_t) (this->boundary[die] + 1)
2366 << (this->erase_shift - 1);
2367 mtd->size += this->diesize[die];
2372 * flexonenand_check_blocks_erased - Check if blocks are erased
2373 * @param mtd_info - mtd info structure
2374 * @param start - first erase block to check
2375 * @param end - last erase block to check
2377 * Converting an unerased block from MLC to SLC
2378 * causes byte values to change. Since both data and its ECC
2379 * have changed, reads on the block give uncorrectable error.
2380 * This might lead to the block being detected as bad.
2382 * Avoid this by ensuring that the block to be converted is
2385 static int flexonenand_check_blocks_erased(struct mtd_info *mtd,
2388 struct onenand_chip *this = mtd->priv;
2391 struct mtd_oob_ops ops = {
2392 .mode = MTD_OPS_PLACE_OOB,
2394 .ooblen = mtd->oobsize,
2396 .oobbuf = this->oob_buf,
2400 printk(KERN_DEBUG "Check blocks from %d to %d\n", start, end);
2402 for (block = start; block <= end; block++) {
2403 addr = flexonenand_addr(this, block);
2404 if (onenand_block_isbad_nolock(mtd, addr, 0))
2408 * Since main area write results in ECC write to spare,
2409 * it is sufficient to check only ECC bytes for change.
2411 ret = onenand_read_oob_nolock(mtd, addr, &ops);
2415 for (i = 0; i < mtd->oobsize; i++)
2416 if (this->oob_buf[i] != 0xff)
2419 if (i != mtd->oobsize) {
2420 printk(KERN_WARNING "Block %d not erased.\n", block);
2429 * flexonenand_set_boundary - Writes the SLC boundary
2430 * @param mtd - mtd info structure
2432 int flexonenand_set_boundary(struct mtd_info *mtd, int die,
2433 int boundary, int lock)
2435 struct onenand_chip *this = mtd->priv;
2436 int ret, density, blksperdie, old, new, thisboundary;
2439 if (die >= this->dies)
2442 if (boundary == this->boundary[die])
2445 density = onenand_get_density(this->device_id);
2446 blksperdie = ((16 << density) << 20) >> this->erase_shift;
2447 blksperdie >>= ONENAND_IS_DDP(this) ? 1 : 0;
2449 if (boundary >= blksperdie) {
2450 printk("flexonenand_set_boundary:"
2451 "Invalid boundary value. "
2452 "Boundary not changed.\n");
2456 /* Check if converting blocks are erased */
2457 old = this->boundary[die] + (die * this->density_mask);
2458 new = boundary + (die * this->density_mask);
2459 ret = flexonenand_check_blocks_erased(mtd, min(old, new)
2460 + 1, max(old, new));
2462 printk(KERN_ERR "flexonenand_set_boundary: Please erase blocks before boundary change\n");
2466 this->command(mtd, FLEXONENAND_CMD_PI_ACCESS, die, 0);
2467 this->wait(mtd, FL_SYNCING);
2469 /* Check is boundary is locked */
2470 this->command(mtd, FLEXONENAND_CMD_READ_PI, die, 0);
2471 ret = this->wait(mtd, FL_READING);
2473 thisboundary = this->read_word(this->base + ONENAND_DATARAM);
2474 if ((thisboundary >> FLEXONENAND_PI_UNLOCK_SHIFT) != 3) {
2475 printk(KERN_ERR "flexonenand_set_boundary: boundary locked\n");
2479 printk(KERN_INFO "flexonenand_set_boundary: Changing die %d boundary: %d%s\n",
2480 die, boundary, lock ? "(Locked)" : "(Unlocked)");
2482 boundary &= FLEXONENAND_PI_MASK;
2483 boundary |= lock ? 0 : (3 << FLEXONENAND_PI_UNLOCK_SHIFT);
2485 addr = die ? this->diesize[0] : 0;
2486 this->command(mtd, ONENAND_CMD_ERASE, addr, 0);
2487 ret = this->wait(mtd, FL_ERASING);
2489 printk("flexonenand_set_boundary:"
2490 "Failed PI erase for Die %d\n", die);
2494 this->write_word(boundary, this->base + ONENAND_DATARAM);
2495 this->command(mtd, ONENAND_CMD_PROG, addr, 0);
2496 ret = this->wait(mtd, FL_WRITING);
2498 printk("flexonenand_set_boundary:"
2499 "Failed PI write for Die %d\n", die);
2503 this->command(mtd, FLEXONENAND_CMD_PI_UPDATE, die, 0);
2504 ret = this->wait(mtd, FL_WRITING);
2506 this->write_word(ONENAND_CMD_RESET, this->base + ONENAND_REG_COMMAND);
2507 this->wait(mtd, FL_RESETING);
2509 /* Recalculate device size on boundary change*/
2510 flexonenand_get_size(mtd);
2516 * onenand_chip_probe - [OneNAND Interface] Probe the OneNAND chip
2517 * @param mtd MTD device structure
2519 * OneNAND detection method:
2520 * Compare the the values from command with ones from register
2522 static int onenand_chip_probe(struct mtd_info *mtd)
2524 struct onenand_chip *this = mtd->priv;
2525 int bram_maf_id, bram_dev_id, maf_id, dev_id;
2528 /* Save system configuration 1 */
2529 syscfg = this->read_word(this->base + ONENAND_REG_SYS_CFG1);
2531 /* Clear Sync. Burst Read mode to read BootRAM */
2532 this->write_word((syscfg & ~ONENAND_SYS_CFG1_SYNC_READ),
2533 this->base + ONENAND_REG_SYS_CFG1);
2535 /* Send the command for reading device ID from BootRAM */
2536 this->write_word(ONENAND_CMD_READID, this->base + ONENAND_BOOTRAM);
2538 /* Read manufacturer and device IDs from BootRAM */
2539 bram_maf_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x0);
2540 bram_dev_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x2);
2542 /* Reset OneNAND to read default register values */
2543 this->write_word(ONENAND_CMD_RESET, this->base + ONENAND_BOOTRAM);
2546 if (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;
2660 mtd->writebufsize = mtd->writesize;
2666 * onenand_scan - [OneNAND Interface] Scan for the OneNAND device
2667 * @param mtd MTD device structure
2668 * @param maxchips Number of chips to scan for
2670 * This fills out all the not initialized function pointers
2671 * with the defaults.
2672 * The flash ID is read and the mtd/chip structures are
2673 * filled with the appropriate values.
2675 int onenand_scan(struct mtd_info *mtd, int maxchips)
2678 struct onenand_chip *this = mtd->priv;
2680 if (!this->read_word)
2681 this->read_word = onenand_readw;
2682 if (!this->write_word)
2683 this->write_word = onenand_writew;
2686 this->command = onenand_command;
2688 this->wait = onenand_wait;
2689 if (!this->bbt_wait)
2690 this->bbt_wait = onenand_bbt_wait;
2692 if (!this->read_bufferram)
2693 this->read_bufferram = onenand_read_bufferram;
2694 if (!this->write_bufferram)
2695 this->write_bufferram = onenand_write_bufferram;
2697 if (!this->chip_probe)
2698 this->chip_probe = onenand_chip_probe;
2700 if (!this->block_markbad)
2701 this->block_markbad = onenand_default_block_markbad;
2702 if (!this->scan_bbt)
2703 this->scan_bbt = onenand_default_bbt;
2705 if (onenand_probe(mtd))
2708 /* Set Sync. Burst Read after probing */
2709 if (this->mmcontrol) {
2710 printk(KERN_INFO "OneNAND Sync. Burst Read support\n");
2711 this->read_bufferram = onenand_sync_read_bufferram;
2714 /* Allocate buffers, if necessary */
2715 if (!this->page_buf) {
2716 this->page_buf = kzalloc(mtd->writesize, GFP_KERNEL);
2717 if (!this->page_buf) {
2718 printk(KERN_ERR "onenand_scan(): Can't allocate page_buf\n");
2721 this->options |= ONENAND_PAGEBUF_ALLOC;
2723 if (!this->oob_buf) {
2724 this->oob_buf = kzalloc(mtd->oobsize, GFP_KERNEL);
2725 if (!this->oob_buf) {
2726 printk(KERN_ERR "onenand_scan: Can't allocate oob_buf\n");
2727 if (this->options & ONENAND_PAGEBUF_ALLOC) {
2728 this->options &= ~ONENAND_PAGEBUF_ALLOC;
2729 kfree(this->page_buf);
2733 this->options |= ONENAND_OOBBUF_ALLOC;
2736 this->state = FL_READY;
2739 * Allow subpage writes up to oobsize.
2741 switch (mtd->oobsize) {
2743 this->ecclayout = &onenand_oob_128;
2744 mtd->subpage_sft = 0;
2748 this->ecclayout = &onenand_oob_64;
2749 mtd->subpage_sft = 2;
2753 this->ecclayout = &onenand_oob_32;
2754 mtd->subpage_sft = 1;
2758 printk(KERN_WARNING "No OOB scheme defined for oobsize %d\n",
2760 mtd->subpage_sft = 0;
2761 /* To prevent kernel oops */
2762 this->ecclayout = &onenand_oob_32;
2766 this->subpagesize = mtd->writesize >> mtd->subpage_sft;
2769 * The number of bytes available for a client to place data into
2770 * the out of band area
2772 this->ecclayout->oobavail = 0;
2774 for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES_LARGE &&
2775 this->ecclayout->oobfree[i].length; i++)
2776 this->ecclayout->oobavail +=
2777 this->ecclayout->oobfree[i].length;
2778 mtd->oobavail = this->ecclayout->oobavail;
2780 mtd->ecclayout = this->ecclayout;
2782 /* Unlock whole block */
2783 onenand_unlock_all(mtd);
2785 return this->scan_bbt(mtd);
2789 * onenand_release - [OneNAND Interface] Free resources held by the OneNAND device
2790 * @param mtd MTD device structure
2792 void onenand_release(struct mtd_info *mtd)