2 * linux/drivers/mtd/onenand/onenand_base.c
4 * Copyright (C) 2005-2007 Samsung Electronics
5 * Kyungmin Park <kyungmin.park@samsung.com>
8 * Adrian Hunter <ext-adrian.hunter@nokia.com>:
9 * auto-placement support, read-while load support, various fixes
10 * Copyright (C) Nokia Corporation, 2007
12 * Rohit Hagargundgi <h.rohit at samsung.com>,
13 * Amul Kumar Saha <amul.saha@samsung.com>:
14 * Flex-OneNAND support
15 * Copyright (C) Samsung Electronics, 2009
17 * This program is free software; you can redistribute it and/or modify
18 * it under the terms of the GNU General Public License version 2 as
19 * published by the Free Software Foundation.
23 #include <linux/compat.h>
24 #include <linux/mtd/mtd.h>
25 #include <linux/mtd/onenand.h>
28 #include <asm/errno.h>
31 /* It should access 16-bit instead of 8-bit */
32 static void *memcpy_16(void *dst
, const void *src
, unsigned int len
)
45 * onenand_oob_128 - oob info for Flex-Onenand with 4KB page
46 * For now, we expose only 64 out of 80 ecc bytes
48 static struct nand_ecclayout onenand_oob_128
= {
51 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
52 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
53 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
54 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
55 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
56 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
60 {2, 4}, {18, 4}, {34, 4}, {50, 4},
61 {66, 4}, {82, 4}, {98, 4}, {114, 4}
66 * onenand_oob_64 - oob info for large (2KB) page
68 static struct nand_ecclayout onenand_oob_64
= {
77 {2, 3}, {14, 2}, {18, 3}, {30, 2},
78 {34, 3}, {46, 2}, {50, 3}, {62, 2}
83 * onenand_oob_32 - oob info for middle (1KB) page
85 static struct nand_ecclayout onenand_oob_32
= {
91 .oobfree
= { {2, 3}, {14, 2}, {18, 3}, {30, 2} }
94 static const unsigned char ffchars
[] = {
95 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
96 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 16 */
97 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
98 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 32 */
99 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
100 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 48 */
101 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
102 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 64 */
103 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
104 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 80 */
105 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
106 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 96 */
107 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
108 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 112 */
109 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
110 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 128 */
114 * onenand_readw - [OneNAND Interface] Read OneNAND register
115 * @param addr address to read
117 * Read OneNAND register
119 static unsigned short onenand_readw(void __iomem
* addr
)
125 * onenand_writew - [OneNAND Interface] Write OneNAND register with value
126 * @param value value to write
127 * @param addr address to write
129 * Write OneNAND register with value
131 static void onenand_writew(unsigned short value
, void __iomem
* addr
)
137 * onenand_block_address - [DEFAULT] Get block address
138 * @param device the device id
139 * @param block the block
140 * @return translated block address if DDP, otherwise same
142 * Setup Start Address 1 Register (F100h)
144 static int onenand_block_address(struct onenand_chip
*this, int block
)
146 /* Device Flash Core select, NAND Flash Block Address */
147 if (block
& this->density_mask
)
148 return ONENAND_DDP_CHIP1
| (block
^ this->density_mask
);
154 * onenand_bufferram_address - [DEFAULT] Get bufferram address
155 * @param device the device id
156 * @param block the block
157 * @return set DBS value if DDP, otherwise 0
159 * Setup Start Address 2 Register (F101h) for DDP
161 static int onenand_bufferram_address(struct onenand_chip
*this, int block
)
163 /* Device BufferRAM Select */
164 if (block
& this->density_mask
)
165 return ONENAND_DDP_CHIP1
;
167 return ONENAND_DDP_CHIP0
;
171 * onenand_page_address - [DEFAULT] Get page address
172 * @param page the page address
173 * @param sector the sector address
174 * @return combined page and sector address
176 * Setup Start Address 8 Register (F107h)
178 static int onenand_page_address(int page
, int sector
)
180 /* Flash Page Address, Flash Sector Address */
183 fpa
= page
& ONENAND_FPA_MASK
;
184 fsa
= sector
& ONENAND_FSA_MASK
;
186 return ((fpa
<< ONENAND_FPA_SHIFT
) | fsa
);
190 * onenand_buffer_address - [DEFAULT] Get buffer address
191 * @param dataram1 DataRAM index
192 * @param sectors the sector address
193 * @param count the number of sectors
194 * @return the start buffer value
196 * Setup Start Buffer Register (F200h)
198 static int onenand_buffer_address(int dataram1
, int sectors
, int count
)
202 /* BufferRAM Sector Address */
203 bsa
= sectors
& ONENAND_BSA_MASK
;
206 bsa
|= ONENAND_BSA_DATARAM1
; /* DataRAM1 */
208 bsa
|= ONENAND_BSA_DATARAM0
; /* DataRAM0 */
210 /* BufferRAM Sector Count */
211 bsc
= count
& ONENAND_BSC_MASK
;
213 return ((bsa
<< ONENAND_BSA_SHIFT
) | bsc
);
217 * flexonenand_block - Return block number for flash address
218 * @param this - OneNAND device structure
219 * @param addr - Address for which block number is needed
221 static unsigned int flexonenand_block(struct onenand_chip
*this, loff_t addr
)
223 unsigned int boundary
, blk
, die
= 0;
225 if (ONENAND_IS_DDP(this) && addr
>= this->diesize
[0]) {
227 addr
-= this->diesize
[0];
230 boundary
= this->boundary
[die
];
232 blk
= addr
>> (this->erase_shift
- 1);
234 blk
= (blk
+ boundary
+ 1) >> 1;
236 blk
+= die
? this->density_mask
: 0;
240 unsigned int onenand_block(struct onenand_chip
*this, loff_t addr
)
242 if (!FLEXONENAND(this))
243 return addr
>> this->erase_shift
;
244 return flexonenand_block(this, addr
);
248 * flexonenand_addr - Return address of the block
249 * @this: OneNAND device structure
250 * @block: Block number on Flex-OneNAND
252 * Return address of the block
254 static loff_t
flexonenand_addr(struct onenand_chip
*this, int block
)
257 int die
= 0, boundary
;
259 if (ONENAND_IS_DDP(this) && block
>= this->density_mask
) {
260 block
-= this->density_mask
;
262 ofs
= this->diesize
[0];
265 boundary
= this->boundary
[die
];
266 ofs
+= (loff_t
) block
<< (this->erase_shift
- 1);
267 if (block
> (boundary
+ 1))
268 ofs
+= (loff_t
) (block
- boundary
- 1)
269 << (this->erase_shift
- 1);
273 loff_t
onenand_addr(struct onenand_chip
*this, int block
)
275 if (!FLEXONENAND(this))
276 return (loff_t
) block
<< this->erase_shift
;
277 return flexonenand_addr(this, block
);
281 * flexonenand_region - [Flex-OneNAND] Return erase region of addr
282 * @param mtd MTD device structure
283 * @param addr address whose erase region needs to be identified
285 int flexonenand_region(struct mtd_info
*mtd
, loff_t addr
)
289 for (i
= 0; i
< mtd
->numeraseregions
; i
++)
290 if (addr
< mtd
->eraseregions
[i
].offset
)
296 * onenand_get_density - [DEFAULT] Get OneNAND density
297 * @param dev_id OneNAND device ID
299 * Get OneNAND density from device ID
301 static inline int onenand_get_density(int dev_id
)
303 int density
= dev_id
>> ONENAND_DEVICE_DENSITY_SHIFT
;
304 return (density
& ONENAND_DEVICE_DENSITY_MASK
);
308 * onenand_command - [DEFAULT] Send command to OneNAND device
309 * @param mtd MTD device structure
310 * @param cmd the command to be sent
311 * @param addr offset to read from or write to
312 * @param len number of bytes to read or write
314 * Send command to OneNAND device. This function is used for middle/large page
315 * devices (1KB/2KB Bytes per page)
317 static int onenand_command(struct mtd_info
*mtd
, int cmd
, loff_t addr
,
320 struct onenand_chip
*this = mtd
->priv
;
324 /* Now we use page size operation */
325 int sectors
= 0, count
= 0;
327 /* Address translation */
329 case ONENAND_CMD_UNLOCK
:
330 case ONENAND_CMD_LOCK
:
331 case ONENAND_CMD_LOCK_TIGHT
:
332 case ONENAND_CMD_UNLOCK_ALL
:
337 case FLEXONENAND_CMD_PI_ACCESS
:
338 /* addr contains die index */
339 block
= addr
* this->density_mask
;
343 case ONENAND_CMD_ERASE
:
344 case ONENAND_CMD_BUFFERRAM
:
345 block
= onenand_block(this, addr
);
349 case FLEXONENAND_CMD_READ_PI
:
350 cmd
= ONENAND_CMD_READ
;
351 block
= addr
* this->density_mask
;
356 block
= onenand_block(this, addr
);
358 - onenand_addr(this, block
)) >> this->page_shift
;
359 page
&= this->page_mask
;
363 /* NOTE: The setting order of the registers is very important! */
364 if (cmd
== ONENAND_CMD_BUFFERRAM
) {
365 /* Select DataRAM for DDP */
366 value
= onenand_bufferram_address(this, block
);
367 this->write_word(value
,
368 this->base
+ ONENAND_REG_START_ADDRESS2
);
370 if (ONENAND_IS_4KB_PAGE(this))
371 ONENAND_SET_BUFFERRAM0(this);
373 /* Switch to the next data buffer */
374 ONENAND_SET_NEXT_BUFFERRAM(this);
380 /* Write 'DFS, FBA' of Flash */
381 value
= onenand_block_address(this, block
);
382 this->write_word(value
,
383 this->base
+ ONENAND_REG_START_ADDRESS1
);
385 /* Select DataRAM for DDP */
386 value
= onenand_bufferram_address(this, block
);
387 this->write_word(value
,
388 this->base
+ ONENAND_REG_START_ADDRESS2
);
395 case FLEXONENAND_CMD_RECOVER_LSB
:
396 case ONENAND_CMD_READ
:
397 case ONENAND_CMD_READOOB
:
398 if (ONENAND_IS_4KB_PAGE(this))
399 dataram
= ONENAND_SET_BUFFERRAM0(this);
401 dataram
= ONENAND_SET_NEXT_BUFFERRAM(this);
406 dataram
= ONENAND_CURRENT_BUFFERRAM(this);
410 /* Write 'FPA, FSA' of Flash */
411 value
= onenand_page_address(page
, sectors
);
412 this->write_word(value
,
413 this->base
+ ONENAND_REG_START_ADDRESS8
);
415 /* Write 'BSA, BSC' of DataRAM */
416 value
= onenand_buffer_address(dataram
, sectors
, count
);
417 this->write_word(value
, this->base
+ ONENAND_REG_START_BUFFER
);
420 /* Interrupt clear */
421 this->write_word(ONENAND_INT_CLEAR
, this->base
+ ONENAND_REG_INTERRUPT
);
423 this->write_word(cmd
, this->base
+ ONENAND_REG_COMMAND
);
429 * onenand_read_ecc - return ecc status
430 * @param this onenand chip structure
432 static int onenand_read_ecc(struct onenand_chip
*this)
436 if (!FLEXONENAND(this))
437 return this->read_word(this->base
+ ONENAND_REG_ECC_STATUS
);
439 for (i
= 0; i
< 4; i
++) {
440 ecc
= this->read_word(this->base
441 + ((ONENAND_REG_ECC_STATUS
+ i
) << 1));
444 if (ecc
& FLEXONENAND_UNCORRECTABLE_ERROR
)
445 return ONENAND_ECC_2BIT_ALL
;
452 * onenand_wait - [DEFAULT] wait until the command is done
453 * @param mtd MTD device structure
454 * @param state state to select the max. timeout value
456 * Wait for command done. This applies to all OneNAND command
457 * Read can take up to 30us, erase up to 2ms and program up to 350us
458 * according to general OneNAND specs
460 static int onenand_wait(struct mtd_info
*mtd
, int state
)
462 struct onenand_chip
*this = mtd
->priv
;
463 unsigned int flags
= ONENAND_INT_MASTER
;
464 unsigned int interrupt
= 0;
468 interrupt
= this->read_word(this->base
+ ONENAND_REG_INTERRUPT
);
469 if (interrupt
& flags
)
473 ctrl
= this->read_word(this->base
+ ONENAND_REG_CTRL_STATUS
);
475 if (interrupt
& ONENAND_INT_READ
) {
476 int ecc
= onenand_read_ecc(this);
477 if (ecc
& ONENAND_ECC_2BIT_ALL
) {
478 printk("onenand_wait: ECC error = 0x%04x\n", ecc
);
483 if (ctrl
& ONENAND_CTRL_ERROR
) {
484 printk("onenand_wait: controller error = 0x%04x\n", ctrl
);
485 if (ctrl
& ONENAND_CTRL_LOCK
)
486 printk("onenand_wait: it's locked error = 0x%04x\n",
497 * onenand_bufferram_offset - [DEFAULT] BufferRAM offset
498 * @param mtd MTD data structure
499 * @param area BufferRAM area
500 * @return offset given area
502 * Return BufferRAM offset given area
504 static inline int onenand_bufferram_offset(struct mtd_info
*mtd
, int area
)
506 struct onenand_chip
*this = mtd
->priv
;
508 if (ONENAND_CURRENT_BUFFERRAM(this)) {
509 if (area
== ONENAND_DATARAM
)
510 return mtd
->writesize
;
511 if (area
== ONENAND_SPARERAM
)
519 * onenand_read_bufferram - [OneNAND Interface] Read the bufferram area
520 * @param mtd MTD data structure
521 * @param area BufferRAM area
522 * @param buffer the databuffer to put/get data
523 * @param offset offset to read from or write to
524 * @param count number of bytes to read/write
526 * Read the BufferRAM area
528 static int onenand_read_bufferram(struct mtd_info
*mtd
, loff_t addr
, int area
,
529 unsigned char *buffer
, int offset
,
532 struct onenand_chip
*this = mtd
->priv
;
533 void __iomem
*bufferram
;
535 bufferram
= this->base
+ area
;
536 bufferram
+= onenand_bufferram_offset(mtd
, area
);
538 memcpy_16(buffer
, bufferram
+ offset
, count
);
544 * onenand_sync_read_bufferram - [OneNAND Interface] Read the bufferram area with Sync. Burst mode
545 * @param mtd MTD data structure
546 * @param area BufferRAM area
547 * @param buffer the databuffer to put/get data
548 * @param offset offset to read from or write to
549 * @param count number of bytes to read/write
551 * Read the BufferRAM area with Sync. Burst Mode
553 static int onenand_sync_read_bufferram(struct mtd_info
*mtd
, loff_t addr
, int area
,
554 unsigned char *buffer
, int offset
,
557 struct onenand_chip
*this = mtd
->priv
;
558 void __iomem
*bufferram
;
560 bufferram
= this->base
+ area
;
561 bufferram
+= onenand_bufferram_offset(mtd
, area
);
563 this->mmcontrol(mtd
, ONENAND_SYS_CFG1_SYNC_READ
);
565 memcpy_16(buffer
, bufferram
+ offset
, count
);
567 this->mmcontrol(mtd
, 0);
573 * onenand_write_bufferram - [OneNAND Interface] Write the bufferram area
574 * @param mtd MTD data structure
575 * @param area BufferRAM area
576 * @param buffer the databuffer to put/get data
577 * @param offset offset to read from or write to
578 * @param count number of bytes to read/write
580 * Write the BufferRAM area
582 static int onenand_write_bufferram(struct mtd_info
*mtd
, loff_t addr
, int area
,
583 const unsigned char *buffer
, int offset
,
586 struct onenand_chip
*this = mtd
->priv
;
587 void __iomem
*bufferram
;
589 bufferram
= this->base
+ area
;
590 bufferram
+= onenand_bufferram_offset(mtd
, area
);
592 memcpy_16(bufferram
+ offset
, buffer
, count
);
598 * onenand_get_2x_blockpage - [GENERIC] Get blockpage at 2x program mode
599 * @param mtd MTD data structure
600 * @param addr address to check
601 * @return blockpage address
603 * Get blockpage address at 2x program mode
605 static int onenand_get_2x_blockpage(struct mtd_info
*mtd
, loff_t addr
)
607 struct onenand_chip
*this = mtd
->priv
;
608 int blockpage
, block
, page
;
610 /* Calculate the even block number */
611 block
= (int) (addr
>> this->erase_shift
) & ~1;
612 /* Is it the odd plane? */
613 if (addr
& this->writesize
)
615 page
= (int) (addr
>> (this->page_shift
+ 1)) & this->page_mask
;
616 blockpage
= (block
<< 7) | page
;
622 * onenand_check_bufferram - [GENERIC] Check BufferRAM information
623 * @param mtd MTD data structure
624 * @param addr address to check
625 * @return 1 if there are valid data, otherwise 0
627 * Check bufferram if there is data we required
629 static int onenand_check_bufferram(struct mtd_info
*mtd
, loff_t addr
)
631 struct onenand_chip
*this = mtd
->priv
;
632 int blockpage
, found
= 0;
635 if (ONENAND_IS_2PLANE(this))
636 blockpage
= onenand_get_2x_blockpage(mtd
, addr
);
638 blockpage
= (int) (addr
>> this->page_shift
);
640 /* Is there valid data? */
641 i
= ONENAND_CURRENT_BUFFERRAM(this);
642 if (this->bufferram
[i
].blockpage
== blockpage
)
645 /* Check another BufferRAM */
646 i
= ONENAND_NEXT_BUFFERRAM(this);
647 if (this->bufferram
[i
].blockpage
== blockpage
) {
648 ONENAND_SET_NEXT_BUFFERRAM(this);
653 if (found
&& ONENAND_IS_DDP(this)) {
654 /* Select DataRAM for DDP */
655 int block
= onenand_block(this, addr
);
656 int value
= onenand_bufferram_address(this, block
);
657 this->write_word(value
, this->base
+ ONENAND_REG_START_ADDRESS2
);
664 * onenand_update_bufferram - [GENERIC] Update BufferRAM information
665 * @param mtd MTD data structure
666 * @param addr address to update
667 * @param valid valid flag
669 * Update BufferRAM information
671 static int onenand_update_bufferram(struct mtd_info
*mtd
, loff_t addr
,
674 struct onenand_chip
*this = mtd
->priv
;
678 if (ONENAND_IS_2PLANE(this))
679 blockpage
= onenand_get_2x_blockpage(mtd
, addr
);
681 blockpage
= (int)(addr
>> this->page_shift
);
683 /* Invalidate another BufferRAM */
684 i
= ONENAND_NEXT_BUFFERRAM(this);
685 if (this->bufferram
[i
].blockpage
== blockpage
)
686 this->bufferram
[i
].blockpage
= -1;
688 /* Update BufferRAM */
689 i
= ONENAND_CURRENT_BUFFERRAM(this);
691 this->bufferram
[i
].blockpage
= blockpage
;
693 this->bufferram
[i
].blockpage
= -1;
699 * onenand_invalidate_bufferram - [GENERIC] Invalidate BufferRAM information
700 * @param mtd MTD data structure
701 * @param addr start address to invalidate
702 * @param len length to invalidate
704 * Invalidate BufferRAM information
706 static void onenand_invalidate_bufferram(struct mtd_info
*mtd
, loff_t addr
,
709 struct onenand_chip
*this = mtd
->priv
;
711 loff_t end_addr
= addr
+ len
;
713 /* Invalidate BufferRAM */
714 for (i
= 0; i
< MAX_BUFFERRAM
; i
++) {
715 loff_t buf_addr
= this->bufferram
[i
].blockpage
<< this->page_shift
;
717 if (buf_addr
>= addr
&& buf_addr
< end_addr
)
718 this->bufferram
[i
].blockpage
= -1;
723 * onenand_get_device - [GENERIC] Get chip for selected access
724 * @param mtd MTD device structure
725 * @param new_state the state which is requested
727 * Get the device and lock it for exclusive access
729 static void onenand_get_device(struct mtd_info
*mtd
, int new_state
)
735 * onenand_release_device - [GENERIC] release chip
736 * @param mtd MTD device structure
738 * Deselect, release chip lock and wake up anyone waiting on the device
740 static void onenand_release_device(struct mtd_info
*mtd
)
746 * onenand_transfer_auto_oob - [INTERN] oob auto-placement transfer
747 * @param mtd MTD device structure
748 * @param buf destination address
749 * @param column oob offset to read from
750 * @param thislen oob length to read
752 static int onenand_transfer_auto_oob(struct mtd_info
*mtd
, uint8_t *buf
,
753 int column
, int thislen
)
755 struct onenand_chip
*this = mtd
->priv
;
756 struct nand_oobfree
*free
;
757 int readcol
= column
;
758 int readend
= column
+ thislen
;
761 uint8_t *oob_buf
= this->oob_buf
;
763 free
= this->ecclayout
->oobfree
;
764 for (i
= 0; i
< MTD_MAX_OOBFREE_ENTRIES
&& free
->length
; i
++, free
++) {
765 if (readcol
>= lastgap
)
766 readcol
+= free
->offset
- lastgap
;
767 if (readend
>= lastgap
)
768 readend
+= free
->offset
- lastgap
;
769 lastgap
= free
->offset
+ free
->length
;
771 this->read_bufferram(mtd
, 0, ONENAND_SPARERAM
, oob_buf
, 0, mtd
->oobsize
);
772 free
= this->ecclayout
->oobfree
;
773 for (i
= 0; i
< MTD_MAX_OOBFREE_ENTRIES
&& free
->length
; i
++, free
++) {
774 int free_end
= free
->offset
+ free
->length
;
775 if (free
->offset
< readend
&& free_end
> readcol
) {
776 int st
= max_t(int,free
->offset
,readcol
);
777 int ed
= min_t(int,free_end
,readend
);
779 memcpy(buf
, oob_buf
+ st
, n
);
781 } else if (column
== 0)
788 * onenand_recover_lsb - [Flex-OneNAND] Recover LSB page data
789 * @param mtd MTD device structure
790 * @param addr address to recover
791 * @param status return value from onenand_wait
793 * MLC NAND Flash cell has paired pages - LSB page and MSB page. LSB page has
794 * lower page address and MSB page has higher page address in paired pages.
795 * If power off occurs during MSB page program, the paired LSB page data can
796 * become corrupt. LSB page recovery read is a way to read LSB page though page
797 * data are corrupted. When uncorrectable error occurs as a result of LSB page
798 * read after power up, issue LSB page recovery read.
800 static int onenand_recover_lsb(struct mtd_info
*mtd
, loff_t addr
, int status
)
802 struct onenand_chip
*this = mtd
->priv
;
805 /* Recovery is only for Flex-OneNAND */
806 if (!FLEXONENAND(this))
809 /* check if we failed due to uncorrectable error */
810 if (!mtd_is_eccerr(status
) && status
!= ONENAND_BBT_READ_ECC_ERROR
)
813 /* check if address lies in MLC region */
814 i
= flexonenand_region(mtd
, addr
);
815 if (mtd
->eraseregions
[i
].erasesize
< (1 << this->erase_shift
))
818 printk("onenand_recover_lsb:"
819 "Attempting to recover from uncorrectable read\n");
821 /* Issue the LSB page recovery command */
822 this->command(mtd
, FLEXONENAND_CMD_RECOVER_LSB
, addr
, this->writesize
);
823 return this->wait(mtd
, FL_READING
);
827 * onenand_read_ops_nolock - [OneNAND Interface] OneNAND read main and/or out-of-band
828 * @param mtd MTD device structure
829 * @param from offset to read from
830 * @param ops oob operation description structure
832 * OneNAND read main and/or out-of-band data
834 static int onenand_read_ops_nolock(struct mtd_info
*mtd
, loff_t from
,
835 struct mtd_oob_ops
*ops
)
837 struct onenand_chip
*this = mtd
->priv
;
838 struct mtd_ecc_stats stats
;
839 size_t len
= ops
->len
;
840 size_t ooblen
= ops
->ooblen
;
841 u_char
*buf
= ops
->datbuf
;
842 u_char
*oobbuf
= ops
->oobbuf
;
843 int read
= 0, column
, thislen
;
844 int oobread
= 0, oobcolumn
, thisooblen
, oobsize
;
845 int ret
= 0, boundary
= 0;
846 int writesize
= this->writesize
;
848 MTDDEBUG(MTD_DEBUG_LEVEL3
, "onenand_read_ops_nolock: from = 0x%08x, len = %i\n", (unsigned int) from
, (int) len
);
850 if (ops
->mode
== MTD_OPS_AUTO_OOB
)
851 oobsize
= this->ecclayout
->oobavail
;
853 oobsize
= mtd
->oobsize
;
855 oobcolumn
= from
& (mtd
->oobsize
- 1);
857 /* Do not allow reads past end of device */
858 if ((from
+ len
) > mtd
->size
) {
859 printk(KERN_ERR
"onenand_read_ops_nolock: Attempt read beyond end of device\n");
865 stats
= mtd
->ecc_stats
;
867 /* Read-while-load method */
868 /* Note: We can't use this feature in MLC */
870 /* Do first load to bufferRAM */
872 if (!onenand_check_bufferram(mtd
, from
)) {
873 this->main_buf
= buf
;
874 this->command(mtd
, ONENAND_CMD_READ
, from
, writesize
);
875 ret
= this->wait(mtd
, FL_READING
);
877 ret
= onenand_recover_lsb(mtd
, from
, ret
);
878 onenand_update_bufferram(mtd
, from
, !ret
);
884 thislen
= min_t(int, writesize
, len
- read
);
885 column
= from
& (writesize
- 1);
886 if (column
+ thislen
> writesize
)
887 thislen
= writesize
- column
;
890 /* If there is more to load then start next load */
892 if (!ONENAND_IS_4KB_PAGE(this) && read
+ thislen
< len
) {
893 this->main_buf
= buf
+ thislen
;
894 this->command(mtd
, ONENAND_CMD_READ
, from
, writesize
);
896 * Chip boundary handling in DDP
897 * Now we issued chip 1 read and pointed chip 1
898 * bufferam so we have to point chip 0 bufferam.
900 if (ONENAND_IS_DDP(this) &&
901 unlikely(from
== (this->chipsize
>> 1))) {
902 this->write_word(ONENAND_DDP_CHIP0
, this->base
+ ONENAND_REG_START_ADDRESS2
);
906 ONENAND_SET_PREV_BUFFERRAM(this);
909 /* While load is going, read from last bufferRAM */
910 this->read_bufferram(mtd
, from
- thislen
, ONENAND_DATARAM
, buf
, column
, thislen
);
912 /* Read oob area if needed */
914 thisooblen
= oobsize
- oobcolumn
;
915 thisooblen
= min_t(int, thisooblen
, ooblen
- oobread
);
917 if (ops
->mode
== MTD_OPS_AUTO_OOB
)
918 onenand_transfer_auto_oob(mtd
, oobbuf
, oobcolumn
, thisooblen
);
920 this->read_bufferram(mtd
, 0, ONENAND_SPARERAM
, oobbuf
, oobcolumn
, thisooblen
);
921 oobread
+= thisooblen
;
922 oobbuf
+= thisooblen
;
926 if (ONENAND_IS_4KB_PAGE(this) && (read
+ thislen
< len
)) {
927 this->command(mtd
, ONENAND_CMD_READ
, from
, writesize
);
928 ret
= this->wait(mtd
, FL_READING
);
930 ret
= onenand_recover_lsb(mtd
, from
, ret
);
931 onenand_update_bufferram(mtd
, from
, !ret
);
932 if (mtd_is_eccerr(ret
))
936 /* See if we are done */
940 /* Set up for next read from bufferRAM */
941 if (unlikely(boundary
))
942 this->write_word(ONENAND_DDP_CHIP1
, this->base
+ ONENAND_REG_START_ADDRESS2
);
943 if (!ONENAND_IS_4KB_PAGE(this))
944 ONENAND_SET_NEXT_BUFFERRAM(this);
946 thislen
= min_t(int, writesize
, len
- read
);
949 if (!ONENAND_IS_4KB_PAGE(this)) {
950 /* Now wait for load */
951 ret
= this->wait(mtd
, FL_READING
);
952 onenand_update_bufferram(mtd
, from
, !ret
);
953 if (mtd_is_eccerr(ret
))
959 * Return success, if no ECC failures, else -EBADMSG
960 * fs driver will take care of that, because
961 * retlen == desired len and result == -EBADMSG
964 ops
->oobretlen
= oobread
;
969 if (mtd
->ecc_stats
.failed
- stats
.failed
)
972 return mtd
->ecc_stats
.corrected
- stats
.corrected
? -EUCLEAN
: 0;
976 * onenand_read_oob_nolock - [MTD Interface] OneNAND read out-of-band
977 * @param mtd MTD device structure
978 * @param from offset to read from
979 * @param ops oob operation description structure
981 * OneNAND read out-of-band data from the spare area
983 static int onenand_read_oob_nolock(struct mtd_info
*mtd
, loff_t from
,
984 struct mtd_oob_ops
*ops
)
986 struct onenand_chip
*this = mtd
->priv
;
987 struct mtd_ecc_stats stats
;
988 int read
= 0, thislen
, column
, oobsize
;
989 size_t len
= ops
->ooblen
;
990 unsigned int mode
= ops
->mode
;
991 u_char
*buf
= ops
->oobbuf
;
992 int ret
= 0, readcmd
;
994 from
+= ops
->ooboffs
;
996 MTDDEBUG(MTD_DEBUG_LEVEL3
, "onenand_read_oob_nolock: from = 0x%08x, len = %i\n", (unsigned int) from
, (int) len
);
998 /* Initialize return length value */
1001 if (mode
== MTD_OPS_AUTO_OOB
)
1002 oobsize
= this->ecclayout
->oobavail
;
1004 oobsize
= mtd
->oobsize
;
1006 column
= from
& (mtd
->oobsize
- 1);
1008 if (unlikely(column
>= oobsize
)) {
1009 printk(KERN_ERR
"onenand_read_oob_nolock: Attempted to start read outside oob\n");
1013 /* Do not allow reads past end of device */
1014 if (unlikely(from
>= mtd
->size
||
1015 column
+ len
> ((mtd
->size
>> this->page_shift
) -
1016 (from
>> this->page_shift
)) * oobsize
)) {
1017 printk(KERN_ERR
"onenand_read_oob_nolock: Attempted to read beyond end of device\n");
1021 stats
= mtd
->ecc_stats
;
1023 readcmd
= ONENAND_IS_4KB_PAGE(this) ?
1024 ONENAND_CMD_READ
: ONENAND_CMD_READOOB
;
1026 while (read
< len
) {
1027 thislen
= oobsize
- column
;
1028 thislen
= min_t(int, thislen
, len
);
1030 this->spare_buf
= buf
;
1031 this->command(mtd
, readcmd
, from
, mtd
->oobsize
);
1033 onenand_update_bufferram(mtd
, from
, 0);
1035 ret
= this->wait(mtd
, FL_READING
);
1037 ret
= onenand_recover_lsb(mtd
, from
, ret
);
1039 if (ret
&& ret
!= -EBADMSG
) {
1040 printk(KERN_ERR
"onenand_read_oob_nolock: read failed = 0x%x\n", ret
);
1044 if (mode
== MTD_OPS_AUTO_OOB
)
1045 onenand_transfer_auto_oob(mtd
, buf
, column
, thislen
);
1047 this->read_bufferram(mtd
, 0, ONENAND_SPARERAM
, buf
, column
, thislen
);
1059 from
+= mtd
->writesize
;
1064 ops
->oobretlen
= read
;
1069 if (mtd
->ecc_stats
.failed
- stats
.failed
)
1076 * onenand_read - [MTD Interface] MTD compability function for onenand_read_ecc
1077 * @param mtd MTD device structure
1078 * @param from offset to read from
1079 * @param len number of bytes to read
1080 * @param retlen pointer to variable to store the number of read bytes
1081 * @param buf the databuffer to put data
1083 * This function simply calls onenand_read_ecc with oob buffer and oobsel = NULL
1085 int onenand_read(struct mtd_info
*mtd
, loff_t from
, size_t len
,
1086 size_t * retlen
, u_char
* buf
)
1088 struct mtd_oob_ops ops
= {
1096 onenand_get_device(mtd
, FL_READING
);
1097 ret
= onenand_read_ops_nolock(mtd
, from
, &ops
);
1098 onenand_release_device(mtd
);
1100 *retlen
= ops
.retlen
;
1105 * onenand_read_oob - [MTD Interface] OneNAND read out-of-band
1106 * @param mtd MTD device structure
1107 * @param from offset to read from
1108 * @param ops oob operations description structure
1110 * OneNAND main and/or out-of-band
1112 int onenand_read_oob(struct mtd_info
*mtd
, loff_t from
,
1113 struct mtd_oob_ops
*ops
)
1117 switch (ops
->mode
) {
1118 case MTD_OPS_PLACE_OOB
:
1119 case MTD_OPS_AUTO_OOB
:
1122 /* Not implemented yet */
1127 onenand_get_device(mtd
, FL_READING
);
1129 ret
= onenand_read_ops_nolock(mtd
, from
, ops
);
1131 ret
= onenand_read_oob_nolock(mtd
, from
, ops
);
1132 onenand_release_device(mtd
);
1138 * onenand_bbt_wait - [DEFAULT] wait until the command is done
1139 * @param mtd MTD device structure
1140 * @param state state to select the max. timeout value
1142 * Wait for command done.
1144 static int onenand_bbt_wait(struct mtd_info
*mtd
, int state
)
1146 struct onenand_chip
*this = mtd
->priv
;
1147 unsigned int flags
= ONENAND_INT_MASTER
;
1148 unsigned int interrupt
;
1152 interrupt
= this->read_word(this->base
+ ONENAND_REG_INTERRUPT
);
1153 if (interrupt
& flags
)
1157 /* To get correct interrupt status in timeout case */
1158 interrupt
= this->read_word(this->base
+ ONENAND_REG_INTERRUPT
);
1159 ctrl
= this->read_word(this->base
+ ONENAND_REG_CTRL_STATUS
);
1161 if (interrupt
& ONENAND_INT_READ
) {
1162 int ecc
= onenand_read_ecc(this);
1163 if (ecc
& ONENAND_ECC_2BIT_ALL
) {
1164 printk(KERN_INFO
"onenand_bbt_wait: ecc error = 0x%04x"
1165 ", controller = 0x%04x\n", ecc
, ctrl
);
1166 return ONENAND_BBT_READ_ERROR
;
1169 printk(KERN_ERR
"onenand_bbt_wait: read timeout!"
1170 "ctrl=0x%04x intr=0x%04x\n", ctrl
, interrupt
);
1171 return ONENAND_BBT_READ_FATAL_ERROR
;
1174 /* Initial bad block case: 0x2400 or 0x0400 */
1175 if (ctrl
& ONENAND_CTRL_ERROR
) {
1176 printk(KERN_DEBUG
"onenand_bbt_wait: controller error = 0x%04x\n", ctrl
);
1177 return ONENAND_BBT_READ_ERROR
;
1184 * onenand_bbt_read_oob - [MTD Interface] OneNAND read out-of-band for bbt scan
1185 * @param mtd MTD device structure
1186 * @param from offset to read from
1187 * @param ops oob operation description structure
1189 * OneNAND read out-of-band data from the spare area for bbt scan
1191 int onenand_bbt_read_oob(struct mtd_info
*mtd
, loff_t from
,
1192 struct mtd_oob_ops
*ops
)
1194 struct onenand_chip
*this = mtd
->priv
;
1195 int read
= 0, thislen
, column
;
1196 int ret
= 0, readcmd
;
1197 size_t len
= ops
->ooblen
;
1198 u_char
*buf
= ops
->oobbuf
;
1200 MTDDEBUG(MTD_DEBUG_LEVEL3
, "onenand_bbt_read_oob: from = 0x%08x, len = %zi\n", (unsigned int) from
, len
);
1202 readcmd
= ONENAND_IS_4KB_PAGE(this) ?
1203 ONENAND_CMD_READ
: ONENAND_CMD_READOOB
;
1205 /* Initialize return value */
1208 /* Do not allow reads past end of device */
1209 if (unlikely((from
+ len
) > mtd
->size
)) {
1210 printk(KERN_ERR
"onenand_bbt_read_oob: Attempt read beyond end of device\n");
1211 return ONENAND_BBT_READ_FATAL_ERROR
;
1214 /* Grab the lock and see if the device is available */
1215 onenand_get_device(mtd
, FL_READING
);
1217 column
= from
& (mtd
->oobsize
- 1);
1219 while (read
< len
) {
1221 thislen
= mtd
->oobsize
- column
;
1222 thislen
= min_t(int, thislen
, len
);
1224 this->spare_buf
= buf
;
1225 this->command(mtd
, readcmd
, from
, mtd
->oobsize
);
1227 onenand_update_bufferram(mtd
, from
, 0);
1229 ret
= this->bbt_wait(mtd
, FL_READING
);
1231 ret
= onenand_recover_lsb(mtd
, from
, ret
);
1236 this->read_bufferram(mtd
, 0, ONENAND_SPARERAM
, buf
, column
, thislen
);
1245 /* Update Page size */
1246 from
+= this->writesize
;
1251 /* Deselect and wake up anyone waiting on the device */
1252 onenand_release_device(mtd
);
1254 ops
->oobretlen
= read
;
1259 #ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE
1261 * onenand_verify_oob - [GENERIC] verify the oob contents after a write
1262 * @param mtd MTD device structure
1263 * @param buf the databuffer to verify
1264 * @param to offset to read from
1266 static int onenand_verify_oob(struct mtd_info
*mtd
, const u_char
*buf
, loff_t to
)
1268 struct onenand_chip
*this = mtd
->priv
;
1269 u_char
*oob_buf
= this->oob_buf
;
1270 int status
, i
, readcmd
;
1272 readcmd
= ONENAND_IS_4KB_PAGE(this) ?
1273 ONENAND_CMD_READ
: ONENAND_CMD_READOOB
;
1275 this->command(mtd
, readcmd
, to
, mtd
->oobsize
);
1276 onenand_update_bufferram(mtd
, to
, 0);
1277 status
= this->wait(mtd
, FL_READING
);
1281 this->read_bufferram(mtd
, 0, ONENAND_SPARERAM
, oob_buf
, 0, mtd
->oobsize
);
1282 for (i
= 0; i
< mtd
->oobsize
; i
++)
1283 if (buf
[i
] != 0xFF && buf
[i
] != oob_buf
[i
])
1290 * onenand_verify - [GENERIC] verify the chip contents after a write
1291 * @param mtd MTD device structure
1292 * @param buf the databuffer to verify
1293 * @param addr offset to read from
1294 * @param len number of bytes to read and compare
1296 static int onenand_verify(struct mtd_info
*mtd
, const u_char
*buf
, loff_t addr
, size_t len
)
1298 struct onenand_chip
*this = mtd
->priv
;
1299 void __iomem
*dataram
;
1301 int thislen
, column
;
1304 thislen
= min_t(int, this->writesize
, len
);
1305 column
= addr
& (this->writesize
- 1);
1306 if (column
+ thislen
> this->writesize
)
1307 thislen
= this->writesize
- column
;
1309 this->command(mtd
, ONENAND_CMD_READ
, addr
, this->writesize
);
1311 onenand_update_bufferram(mtd
, addr
, 0);
1313 ret
= this->wait(mtd
, FL_READING
);
1317 onenand_update_bufferram(mtd
, addr
, 1);
1319 dataram
= this->base
+ ONENAND_DATARAM
;
1320 dataram
+= onenand_bufferram_offset(mtd
, ONENAND_DATARAM
);
1322 if (memcmp(buf
, dataram
+ column
, thislen
))
1333 #define onenand_verify(...) (0)
1334 #define onenand_verify_oob(...) (0)
1337 #define NOTALIGNED(x) ((x & (this->subpagesize - 1)) != 0)
1340 * onenand_fill_auto_oob - [INTERN] oob auto-placement transfer
1341 * @param mtd MTD device structure
1342 * @param oob_buf oob buffer
1343 * @param buf source address
1344 * @param column oob offset to write to
1345 * @param thislen oob length to write
1347 static int onenand_fill_auto_oob(struct mtd_info
*mtd
, u_char
*oob_buf
,
1348 const u_char
*buf
, int column
, int thislen
)
1350 struct onenand_chip
*this = mtd
->priv
;
1351 struct nand_oobfree
*free
;
1352 int writecol
= column
;
1353 int writeend
= column
+ thislen
;
1357 free
= this->ecclayout
->oobfree
;
1358 for (i
= 0; i
< MTD_MAX_OOBFREE_ENTRIES
&& free
->length
; i
++, free
++) {
1359 if (writecol
>= lastgap
)
1360 writecol
+= free
->offset
- lastgap
;
1361 if (writeend
>= lastgap
)
1362 writeend
+= free
->offset
- lastgap
;
1363 lastgap
= free
->offset
+ free
->length
;
1365 free
= this->ecclayout
->oobfree
;
1366 for (i
= 0; i
< MTD_MAX_OOBFREE_ENTRIES
&& free
->length
; i
++, free
++) {
1367 int free_end
= free
->offset
+ free
->length
;
1368 if (free
->offset
< writeend
&& free_end
> writecol
) {
1369 int st
= max_t(int,free
->offset
,writecol
);
1370 int ed
= min_t(int,free_end
,writeend
);
1372 memcpy(oob_buf
+ st
, buf
, n
);
1374 } else if (column
== 0)
1381 * onenand_write_ops_nolock - [OneNAND Interface] write main and/or out-of-band
1382 * @param mtd MTD device structure
1383 * @param to offset to write to
1384 * @param ops oob operation description structure
1386 * Write main and/or oob with ECC
1388 static int onenand_write_ops_nolock(struct mtd_info
*mtd
, loff_t to
,
1389 struct mtd_oob_ops
*ops
)
1391 struct onenand_chip
*this = mtd
->priv
;
1392 int written
= 0, column
, thislen
, subpage
;
1393 int oobwritten
= 0, oobcolumn
, thisooblen
, oobsize
;
1394 size_t len
= ops
->len
;
1395 size_t ooblen
= ops
->ooblen
;
1396 const u_char
*buf
= ops
->datbuf
;
1397 const u_char
*oob
= ops
->oobbuf
;
1401 MTDDEBUG(MTD_DEBUG_LEVEL3
, "onenand_write_ops_nolock: to = 0x%08x, len = %i\n", (unsigned int) to
, (int) len
);
1403 /* Initialize retlen, in case of early exit */
1407 /* Reject writes, which are not page aligned */
1408 if (unlikely(NOTALIGNED(to
) || NOTALIGNED(len
))) {
1409 printk(KERN_ERR
"onenand_write_ops_nolock: Attempt to write not page aligned data\n");
1413 if (ops
->mode
== MTD_OPS_AUTO_OOB
)
1414 oobsize
= this->ecclayout
->oobavail
;
1416 oobsize
= mtd
->oobsize
;
1418 oobcolumn
= to
& (mtd
->oobsize
- 1);
1420 column
= to
& (mtd
->writesize
- 1);
1422 /* Loop until all data write */
1423 while (written
< len
) {
1424 u_char
*wbuf
= (u_char
*) buf
;
1426 thislen
= min_t(int, mtd
->writesize
- column
, len
- written
);
1427 thisooblen
= min_t(int, oobsize
- oobcolumn
, ooblen
- oobwritten
);
1429 this->command(mtd
, ONENAND_CMD_BUFFERRAM
, to
, thislen
);
1431 /* Partial page write */
1432 subpage
= thislen
< mtd
->writesize
;
1434 memset(this->page_buf
, 0xff, mtd
->writesize
);
1435 memcpy(this->page_buf
+ column
, buf
, thislen
);
1436 wbuf
= this->page_buf
;
1439 this->write_bufferram(mtd
, to
, ONENAND_DATARAM
, wbuf
, 0, mtd
->writesize
);
1442 oobbuf
= this->oob_buf
;
1444 /* We send data to spare ram with oobsize
1445 * * to prevent byte access */
1446 memset(oobbuf
, 0xff, mtd
->oobsize
);
1447 if (ops
->mode
== MTD_OPS_AUTO_OOB
)
1448 onenand_fill_auto_oob(mtd
, oobbuf
, oob
, oobcolumn
, thisooblen
);
1450 memcpy(oobbuf
+ oobcolumn
, oob
, thisooblen
);
1452 oobwritten
+= thisooblen
;
1456 oobbuf
= (u_char
*) ffchars
;
1458 this->write_bufferram(mtd
, 0, ONENAND_SPARERAM
, oobbuf
, 0, mtd
->oobsize
);
1460 this->command(mtd
, ONENAND_CMD_PROG
, to
, mtd
->writesize
);
1462 ret
= this->wait(mtd
, FL_WRITING
);
1464 /* In partial page write we don't update bufferram */
1465 onenand_update_bufferram(mtd
, to
, !ret
&& !subpage
);
1466 if (ONENAND_IS_2PLANE(this)) {
1467 ONENAND_SET_BUFFERRAM1(this);
1468 onenand_update_bufferram(mtd
, to
+ this->writesize
, !ret
&& !subpage
);
1472 printk(KERN_ERR
"onenand_write_ops_nolock: write filaed %d\n", ret
);
1476 /* Only check verify write turn on */
1477 ret
= onenand_verify(mtd
, buf
, to
, thislen
);
1479 printk(KERN_ERR
"onenand_write_ops_nolock: verify failed %d\n", ret
);
1493 ops
->retlen
= written
;
1499 * onenand_write_oob_nolock - [INTERN] OneNAND write out-of-band
1500 * @param mtd MTD device structure
1501 * @param to offset to write to
1502 * @param len number of bytes to write
1503 * @param retlen pointer to variable to store the number of written bytes
1504 * @param buf the data to write
1505 * @param mode operation mode
1507 * OneNAND write out-of-band
1509 static int onenand_write_oob_nolock(struct mtd_info
*mtd
, loff_t to
,
1510 struct mtd_oob_ops
*ops
)
1512 struct onenand_chip
*this = mtd
->priv
;
1513 int column
, ret
= 0, oobsize
;
1514 int written
= 0, oobcmd
;
1516 size_t len
= ops
->ooblen
;
1517 const u_char
*buf
= ops
->oobbuf
;
1518 unsigned int mode
= ops
->mode
;
1522 MTDDEBUG(MTD_DEBUG_LEVEL3
, "onenand_write_oob_nolock: to = 0x%08x, len = %i\n", (unsigned int) to
, (int) len
);
1524 /* Initialize retlen, in case of early exit */
1527 if (mode
== MTD_OPS_AUTO_OOB
)
1528 oobsize
= this->ecclayout
->oobavail
;
1530 oobsize
= mtd
->oobsize
;
1532 column
= to
& (mtd
->oobsize
- 1);
1534 if (unlikely(column
>= oobsize
)) {
1535 printk(KERN_ERR
"onenand_write_oob_nolock: Attempted to start write outside oob\n");
1539 /* For compatibility with NAND: Do not allow write past end of page */
1540 if (unlikely(column
+ len
> oobsize
)) {
1541 printk(KERN_ERR
"onenand_write_oob_nolock: "
1542 "Attempt to write past end of page\n");
1546 /* Do not allow reads past end of device */
1547 if (unlikely(to
>= mtd
->size
||
1548 column
+ len
> ((mtd
->size
>> this->page_shift
) -
1549 (to
>> this->page_shift
)) * oobsize
)) {
1550 printk(KERN_ERR
"onenand_write_oob_nolock: Attempted to write past end of device\n");
1554 oobbuf
= this->oob_buf
;
1556 oobcmd
= ONENAND_IS_4KB_PAGE(this) ?
1557 ONENAND_CMD_PROG
: ONENAND_CMD_PROGOOB
;
1559 /* Loop until all data write */
1560 while (written
< len
) {
1561 int thislen
= min_t(int, oobsize
, len
- written
);
1563 this->command(mtd
, ONENAND_CMD_BUFFERRAM
, to
, mtd
->oobsize
);
1565 /* We send data to spare ram with oobsize
1566 * to prevent byte access */
1567 memset(oobbuf
, 0xff, mtd
->oobsize
);
1568 if (mode
== MTD_OPS_AUTO_OOB
)
1569 onenand_fill_auto_oob(mtd
, oobbuf
, buf
, column
, thislen
);
1571 memcpy(oobbuf
+ column
, buf
, thislen
);
1572 this->write_bufferram(mtd
, 0, ONENAND_SPARERAM
, oobbuf
, 0, mtd
->oobsize
);
1574 if (ONENAND_IS_4KB_PAGE(this)) {
1575 /* Set main area of DataRAM to 0xff*/
1576 memset(this->page_buf
, 0xff, mtd
->writesize
);
1577 this->write_bufferram(mtd
, 0, ONENAND_DATARAM
,
1578 this->page_buf
, 0, mtd
->writesize
);
1581 this->command(mtd
, oobcmd
, to
, mtd
->oobsize
);
1583 onenand_update_bufferram(mtd
, to
, 0);
1584 if (ONENAND_IS_2PLANE(this)) {
1585 ONENAND_SET_BUFFERRAM1(this);
1586 onenand_update_bufferram(mtd
, to
+ this->writesize
, 0);
1589 ret
= this->wait(mtd
, FL_WRITING
);
1591 printk(KERN_ERR
"onenand_write_oob_nolock: write failed %d\n", ret
);
1595 ret
= onenand_verify_oob(mtd
, oobbuf
, to
);
1597 printk(KERN_ERR
"onenand_write_oob_nolock: verify failed %d\n", ret
);
1605 to
+= mtd
->writesize
;
1610 ops
->oobretlen
= written
;
1616 * onenand_write - [MTD Interface] compability function for onenand_write_ecc
1617 * @param mtd MTD device structure
1618 * @param to offset to write to
1619 * @param len number of bytes to write
1620 * @param retlen pointer to variable to store the number of written bytes
1621 * @param buf the data to write
1625 int onenand_write(struct mtd_info
*mtd
, loff_t to
, size_t len
,
1626 size_t * retlen
, const u_char
* buf
)
1628 struct mtd_oob_ops ops
= {
1631 .datbuf
= (u_char
*) buf
,
1636 onenand_get_device(mtd
, FL_WRITING
);
1637 ret
= onenand_write_ops_nolock(mtd
, to
, &ops
);
1638 onenand_release_device(mtd
);
1640 *retlen
= ops
.retlen
;
1645 * onenand_write_oob - [MTD Interface] OneNAND write out-of-band
1646 * @param mtd MTD device structure
1647 * @param to offset to write to
1648 * @param ops oob operation description structure
1650 * OneNAND write main and/or out-of-band
1652 int onenand_write_oob(struct mtd_info
*mtd
, loff_t to
,
1653 struct mtd_oob_ops
*ops
)
1657 switch (ops
->mode
) {
1658 case MTD_OPS_PLACE_OOB
:
1659 case MTD_OPS_AUTO_OOB
:
1662 /* Not implemented yet */
1667 onenand_get_device(mtd
, FL_WRITING
);
1669 ret
= onenand_write_ops_nolock(mtd
, to
, ops
);
1671 ret
= onenand_write_oob_nolock(mtd
, to
, ops
);
1672 onenand_release_device(mtd
);
1679 * onenand_block_isbad_nolock - [GENERIC] Check if a block is marked bad
1680 * @param mtd MTD device structure
1681 * @param ofs offset from device start
1682 * @param allowbbt 1, if its allowed to access the bbt area
1684 * Check, if the block is bad, Either by reading the bad block table or
1685 * calling of the scan function.
1687 static int onenand_block_isbad_nolock(struct mtd_info
*mtd
, loff_t ofs
, int allowbbt
)
1689 struct onenand_chip
*this = mtd
->priv
;
1690 struct bbm_info
*bbm
= this->bbm
;
1692 /* Return info from the table */
1693 return bbm
->isbad_bbt(mtd
, ofs
, allowbbt
);
1698 * onenand_erase - [MTD Interface] erase block(s)
1699 * @param mtd MTD device structure
1700 * @param instr erase instruction
1702 * Erase one ore more blocks
1704 int onenand_erase(struct mtd_info
*mtd
, struct erase_info
*instr
)
1706 struct onenand_chip
*this = mtd
->priv
;
1707 unsigned int block_size
;
1708 loff_t addr
= instr
->addr
;
1709 unsigned int len
= instr
->len
;
1711 struct mtd_erase_region_info
*region
= NULL
;
1712 unsigned int region_end
= 0;
1714 MTDDEBUG(MTD_DEBUG_LEVEL3
, "onenand_erase: start = 0x%08x, len = %i\n",
1715 (unsigned int) addr
, len
);
1717 if (FLEXONENAND(this)) {
1718 /* Find the eraseregion of this address */
1719 i
= flexonenand_region(mtd
, addr
);
1720 region
= &mtd
->eraseregions
[i
];
1722 block_size
= region
->erasesize
;
1723 region_end
= region
->offset
1724 + region
->erasesize
* region
->numblocks
;
1726 /* Start address within region must align on block boundary.
1727 * Erase region's start offset is always block start address.
1729 if (unlikely((addr
- region
->offset
) & (block_size
- 1))) {
1730 MTDDEBUG(MTD_DEBUG_LEVEL0
, "onenand_erase:"
1731 " Unaligned address\n");
1735 block_size
= 1 << this->erase_shift
;
1737 /* Start address must align on block boundary */
1738 if (unlikely(addr
& (block_size
- 1))) {
1739 MTDDEBUG(MTD_DEBUG_LEVEL0
, "onenand_erase:"
1740 "Unaligned address\n");
1745 /* Length must align on block boundary */
1746 if (unlikely(len
& (block_size
- 1))) {
1747 MTDDEBUG (MTD_DEBUG_LEVEL0
,
1748 "onenand_erase: Length not block aligned\n");
1752 /* Grab the lock and see if the device is available */
1753 onenand_get_device(mtd
, FL_ERASING
);
1755 /* Loop throught the pages */
1756 instr
->state
= MTD_ERASING
;
1760 /* Check if we have a bad block, we do not erase bad blocks */
1761 if (instr
->priv
== 0 && onenand_block_isbad_nolock(mtd
, addr
, 0)) {
1762 printk(KERN_WARNING
"onenand_erase: attempt to erase"
1763 " a bad block at addr 0x%08x\n",
1764 (unsigned int) addr
);
1765 instr
->state
= MTD_ERASE_FAILED
;
1769 this->command(mtd
, ONENAND_CMD_ERASE
, addr
, block_size
);
1771 onenand_invalidate_bufferram(mtd
, addr
, block_size
);
1773 ret
= this->wait(mtd
, FL_ERASING
);
1774 /* Check, if it is write protected */
1777 MTDDEBUG (MTD_DEBUG_LEVEL0
, "onenand_erase: "
1778 "Device is write protected!!!\n");
1780 MTDDEBUG (MTD_DEBUG_LEVEL0
, "onenand_erase: "
1781 "Failed erase, block %d\n",
1782 onenand_block(this, addr
));
1783 instr
->state
= MTD_ERASE_FAILED
;
1784 instr
->fail_addr
= addr
;
1792 if (addr
== region_end
) {
1797 block_size
= region
->erasesize
;
1798 region_end
= region
->offset
1799 + region
->erasesize
* region
->numblocks
;
1801 if (len
& (block_size
- 1)) {
1802 /* This has been checked at MTD
1803 * partitioning level. */
1804 printk("onenand_erase: Unaligned address\n");
1810 instr
->state
= MTD_ERASE_DONE
;
1814 ret
= instr
->state
== MTD_ERASE_DONE
? 0 : -EIO
;
1815 /* Do call back function */
1817 mtd_erase_callback(instr
);
1819 /* Deselect and wake up anyone waiting on the device */
1820 onenand_release_device(mtd
);
1826 * onenand_sync - [MTD Interface] sync
1827 * @param mtd MTD device structure
1829 * Sync is actually a wait for chip ready function
1831 void onenand_sync(struct mtd_info
*mtd
)
1833 MTDDEBUG (MTD_DEBUG_LEVEL3
, "onenand_sync: called\n");
1835 /* Grab the lock and see if the device is available */
1836 onenand_get_device(mtd
, FL_SYNCING
);
1838 /* Release it and go back */
1839 onenand_release_device(mtd
);
1843 * onenand_block_isbad - [MTD Interface] Check whether the block at the given offset is bad
1844 * @param mtd MTD device structure
1845 * @param ofs offset relative to mtd start
1847 * Check whether the block is bad
1849 int onenand_block_isbad(struct mtd_info
*mtd
, loff_t ofs
)
1853 /* Check for invalid offset */
1854 if (ofs
> mtd
->size
)
1857 onenand_get_device(mtd
, FL_READING
);
1858 ret
= onenand_block_isbad_nolock(mtd
,ofs
, 0);
1859 onenand_release_device(mtd
);
1864 * onenand_default_block_markbad - [DEFAULT] mark a block bad
1865 * @param mtd MTD device structure
1866 * @param ofs offset from device start
1868 * This is the default implementation, which can be overridden by
1869 * a hardware specific driver.
1871 static int onenand_default_block_markbad(struct mtd_info
*mtd
, loff_t ofs
)
1873 struct onenand_chip
*this = mtd
->priv
;
1874 struct bbm_info
*bbm
= this->bbm
;
1875 u_char buf
[2] = {0, 0};
1876 struct mtd_oob_ops ops
= {
1877 .mode
= MTD_OPS_PLACE_OOB
,
1884 /* Get block number */
1885 block
= onenand_block(this, ofs
);
1887 bbm
->bbt
[block
>> 2] |= 0x01 << ((block
& 0x03) << 1);
1889 /* We write two bytes, so we dont have to mess with 16 bit access */
1890 ofs
+= mtd
->oobsize
+ (bbm
->badblockpos
& ~0x01);
1891 return onenand_write_oob_nolock(mtd
, ofs
, &ops
);
1895 * onenand_block_markbad - [MTD Interface] Mark the block at the given offset as bad
1896 * @param mtd MTD device structure
1897 * @param ofs offset relative to mtd start
1899 * Mark the block as bad
1901 int onenand_block_markbad(struct mtd_info
*mtd
, loff_t ofs
)
1905 ret
= onenand_block_isbad(mtd
, ofs
);
1907 /* If it was bad already, return success and do nothing */
1913 ret
= mtd_block_markbad(mtd
, ofs
);
1918 * onenand_do_lock_cmd - [OneNAND Interface] Lock or unlock block(s)
1919 * @param mtd MTD device structure
1920 * @param ofs offset relative to mtd start
1921 * @param len number of bytes to lock or unlock
1922 * @param cmd lock or unlock command
1924 * Lock or unlock one or more blocks
1926 static int onenand_do_lock_cmd(struct mtd_info
*mtd
, loff_t ofs
, size_t len
, int cmd
)
1928 struct onenand_chip
*this = mtd
->priv
;
1929 int start
, end
, block
, value
, status
;
1931 start
= onenand_block(this, ofs
);
1932 end
= onenand_block(this, ofs
+ len
);
1934 /* Continuous lock scheme */
1935 if (this->options
& ONENAND_HAS_CONT_LOCK
) {
1936 /* Set start block address */
1937 this->write_word(start
,
1938 this->base
+ ONENAND_REG_START_BLOCK_ADDRESS
);
1939 /* Set end block address */
1940 this->write_word(end
- 1,
1941 this->base
+ ONENAND_REG_END_BLOCK_ADDRESS
);
1942 /* Write unlock command */
1943 this->command(mtd
, cmd
, 0, 0);
1945 /* There's no return value */
1946 this->wait(mtd
, FL_UNLOCKING
);
1949 while (this->read_word(this->base
+ ONENAND_REG_CTRL_STATUS
)
1950 & ONENAND_CTRL_ONGO
)
1953 /* Check lock status */
1954 status
= this->read_word(this->base
+ ONENAND_REG_WP_STATUS
);
1955 if (!(status
& ONENAND_WP_US
))
1956 printk(KERN_ERR
"wp status = 0x%x\n", status
);
1961 /* Block lock scheme */
1962 for (block
= start
; block
< end
; block
++) {
1963 /* Set block address */
1964 value
= onenand_block_address(this, block
);
1965 this->write_word(value
, this->base
+ ONENAND_REG_START_ADDRESS1
);
1966 /* Select DataRAM for DDP */
1967 value
= onenand_bufferram_address(this, block
);
1968 this->write_word(value
, this->base
+ ONENAND_REG_START_ADDRESS2
);
1970 /* Set start block address */
1971 this->write_word(block
,
1972 this->base
+ ONENAND_REG_START_BLOCK_ADDRESS
);
1973 /* Write unlock command */
1974 this->command(mtd
, ONENAND_CMD_UNLOCK
, 0, 0);
1976 /* There's no return value */
1977 this->wait(mtd
, FL_UNLOCKING
);
1980 while (this->read_word(this->base
+ ONENAND_REG_CTRL_STATUS
)
1981 & ONENAND_CTRL_ONGO
)
1984 /* Check lock status */
1985 status
= this->read_word(this->base
+ ONENAND_REG_WP_STATUS
);
1986 if (!(status
& ONENAND_WP_US
))
1987 printk(KERN_ERR
"block = %d, wp status = 0x%x\n",
1994 #ifdef ONENAND_LINUX
1996 * onenand_lock - [MTD Interface] Lock block(s)
1997 * @param mtd MTD device structure
1998 * @param ofs offset relative to mtd start
1999 * @param len number of bytes to unlock
2001 * Lock one or more blocks
2003 static int onenand_lock(struct mtd_info
*mtd
, loff_t ofs
, size_t len
)
2007 onenand_get_device(mtd
, FL_LOCKING
);
2008 ret
= onenand_do_lock_cmd(mtd
, ofs
, len
, ONENAND_CMD_LOCK
);
2009 onenand_release_device(mtd
);
2014 * onenand_unlock - [MTD Interface] Unlock block(s)
2015 * @param mtd MTD device structure
2016 * @param ofs offset relative to mtd start
2017 * @param len number of bytes to unlock
2019 * Unlock one or more blocks
2021 static int onenand_unlock(struct mtd_info
*mtd
, loff_t ofs
, size_t len
)
2025 onenand_get_device(mtd
, FL_LOCKING
);
2026 ret
= onenand_do_lock_cmd(mtd
, ofs
, len
, ONENAND_CMD_UNLOCK
);
2027 onenand_release_device(mtd
);
2033 * onenand_check_lock_status - [OneNAND Interface] Check lock status
2034 * @param this onenand chip data structure
2038 static int onenand_check_lock_status(struct onenand_chip
*this)
2040 unsigned int value
, block
, status
;
2043 end
= this->chipsize
>> this->erase_shift
;
2044 for (block
= 0; block
< end
; block
++) {
2045 /* Set block address */
2046 value
= onenand_block_address(this, block
);
2047 this->write_word(value
, this->base
+ ONENAND_REG_START_ADDRESS1
);
2048 /* Select DataRAM for DDP */
2049 value
= onenand_bufferram_address(this, block
);
2050 this->write_word(value
, this->base
+ ONENAND_REG_START_ADDRESS2
);
2051 /* Set start block address */
2052 this->write_word(block
, this->base
+ ONENAND_REG_START_BLOCK_ADDRESS
);
2054 /* Check lock status */
2055 status
= this->read_word(this->base
+ ONENAND_REG_WP_STATUS
);
2056 if (!(status
& ONENAND_WP_US
)) {
2057 printk(KERN_ERR
"block = %d, wp status = 0x%x\n", block
, status
);
2066 * onenand_unlock_all - [OneNAND Interface] unlock all blocks
2067 * @param mtd MTD device structure
2071 static void onenand_unlock_all(struct mtd_info
*mtd
)
2073 struct onenand_chip
*this = mtd
->priv
;
2075 size_t len
= mtd
->size
;
2077 if (this->options
& ONENAND_HAS_UNLOCK_ALL
) {
2078 /* Set start block address */
2079 this->write_word(0, this->base
+ ONENAND_REG_START_BLOCK_ADDRESS
);
2080 /* Write unlock command */
2081 this->command(mtd
, ONENAND_CMD_UNLOCK_ALL
, 0, 0);
2083 /* There's no return value */
2084 this->wait(mtd
, FL_LOCKING
);
2087 while (this->read_word(this->base
+ ONENAND_REG_CTRL_STATUS
)
2088 & ONENAND_CTRL_ONGO
)
2091 /* Check lock status */
2092 if (onenand_check_lock_status(this))
2095 /* Workaround for all block unlock in DDP */
2096 if (ONENAND_IS_DDP(this) && !FLEXONENAND(this)) {
2097 /* All blocks on another chip */
2098 ofs
= this->chipsize
>> 1;
2099 len
= this->chipsize
>> 1;
2103 onenand_do_lock_cmd(mtd
, ofs
, len
, ONENAND_CMD_UNLOCK
);
2108 * onenand_check_features - Check and set OneNAND features
2109 * @param mtd MTD data structure
2111 * Check and set OneNAND features
2115 static void onenand_check_features(struct mtd_info
*mtd
)
2117 struct onenand_chip
*this = mtd
->priv
;
2118 unsigned int density
, process
;
2120 /* Lock scheme depends on density and process */
2121 density
= onenand_get_density(this->device_id
);
2122 process
= this->version_id
>> ONENAND_VERSION_PROCESS_SHIFT
;
2126 case ONENAND_DEVICE_DENSITY_4Gb
:
2127 if (ONENAND_IS_DDP(this))
2128 this->options
|= ONENAND_HAS_2PLANE
;
2130 this->options
|= ONENAND_HAS_4KB_PAGE
;
2132 case ONENAND_DEVICE_DENSITY_2Gb
:
2133 /* 2Gb DDP don't have 2 plane */
2134 if (!ONENAND_IS_DDP(this))
2135 this->options
|= ONENAND_HAS_2PLANE
;
2136 this->options
|= ONENAND_HAS_UNLOCK_ALL
;
2138 case ONENAND_DEVICE_DENSITY_1Gb
:
2139 /* A-Die has all block unlock */
2141 this->options
|= ONENAND_HAS_UNLOCK_ALL
;
2145 /* Some OneNAND has continuous lock scheme */
2147 this->options
|= ONENAND_HAS_CONT_LOCK
;
2151 if (ONENAND_IS_MLC(this))
2152 this->options
|= ONENAND_HAS_4KB_PAGE
;
2154 if (ONENAND_IS_4KB_PAGE(this))
2155 this->options
&= ~ONENAND_HAS_2PLANE
;
2157 if (FLEXONENAND(this)) {
2158 this->options
&= ~ONENAND_HAS_CONT_LOCK
;
2159 this->options
|= ONENAND_HAS_UNLOCK_ALL
;
2162 if (this->options
& ONENAND_HAS_CONT_LOCK
)
2163 printk(KERN_DEBUG
"Lock scheme is Continuous Lock\n");
2164 if (this->options
& ONENAND_HAS_UNLOCK_ALL
)
2165 printk(KERN_DEBUG
"Chip support all block unlock\n");
2166 if (this->options
& ONENAND_HAS_2PLANE
)
2167 printk(KERN_DEBUG
"Chip has 2 plane\n");
2168 if (this->options
& ONENAND_HAS_4KB_PAGE
)
2169 printk(KERN_DEBUG
"Chip has 4KiB pagesize\n");
2174 * onenand_print_device_info - Print device ID
2175 * @param device device ID
2179 char *onenand_print_device_info(int device
, int version
)
2181 int vcc
, demuxed
, ddp
, density
, flexonenand
;
2182 char *dev_info
= malloc(80);
2185 vcc
= device
& ONENAND_DEVICE_VCC_MASK
;
2186 demuxed
= device
& ONENAND_DEVICE_IS_DEMUX
;
2187 ddp
= device
& ONENAND_DEVICE_IS_DDP
;
2188 density
= onenand_get_density(device
);
2189 flexonenand
= device
& DEVICE_IS_FLEXONENAND
;
2190 p
+= sprintf(dev_info
, "%s%sOneNAND%s %dMB %sV 16-bit (0x%02x)",
2191 demuxed
? "" : "Muxed ",
2192 flexonenand
? "Flex-" : "",
2194 (16 << density
), vcc
? "2.65/3.3" : "1.8", device
);
2196 sprintf(p
, "\nOneNAND version = 0x%04x", version
);
2197 printk("%s\n", dev_info
);
2202 static const struct onenand_manufacturers onenand_manuf_ids
[] = {
2203 {ONENAND_MFR_NUMONYX
, "Numonyx"},
2204 {ONENAND_MFR_SAMSUNG
, "Samsung"},
2208 * onenand_check_maf - Check manufacturer ID
2209 * @param manuf manufacturer ID
2211 * Check manufacturer ID
2213 static int onenand_check_maf(int manuf
)
2215 int size
= ARRAY_SIZE(onenand_manuf_ids
);
2217 #ifdef ONENAND_DEBUG
2221 for (i
= 0; i
< size
; i
++)
2222 if (manuf
== onenand_manuf_ids
[i
].id
)
2225 #ifdef ONENAND_DEBUG
2227 name
= onenand_manuf_ids
[i
].name
;
2231 printk(KERN_DEBUG
"OneNAND Manufacturer: %s (0x%0x)\n", name
, manuf
);
2238 * flexonenand_get_boundary - Reads the SLC boundary
2239 * @param onenand_info - onenand info structure
2241 * Fill up boundary[] field in onenand_chip
2243 static int flexonenand_get_boundary(struct mtd_info
*mtd
)
2245 struct onenand_chip
*this = mtd
->priv
;
2246 unsigned int die
, bdry
;
2250 syscfg
= this->read_word(this->base
+ ONENAND_REG_SYS_CFG1
);
2251 this->write_word((syscfg
| 0x0100), this->base
+ ONENAND_REG_SYS_CFG1
);
2253 for (die
= 0; die
< this->dies
; die
++) {
2254 this->command(mtd
, FLEXONENAND_CMD_PI_ACCESS
, die
, 0);
2255 this->wait(mtd
, FL_SYNCING
);
2257 this->command(mtd
, FLEXONENAND_CMD_READ_PI
, die
, 0);
2258 this->wait(mtd
, FL_READING
);
2260 bdry
= this->read_word(this->base
+ ONENAND_DATARAM
);
2261 if ((bdry
>> FLEXONENAND_PI_UNLOCK_SHIFT
) == 3)
2265 this->boundary
[die
] = bdry
& FLEXONENAND_PI_MASK
;
2267 this->command(mtd
, ONENAND_CMD_RESET
, 0, 0);
2268 this->wait(mtd
, FL_RESETING
);
2270 printk(KERN_INFO
"Die %d boundary: %d%s\n", die
,
2271 this->boundary
[die
], locked
? "(Locked)" : "(Unlocked)");
2275 this->write_word(syscfg
, this->base
+ ONENAND_REG_SYS_CFG1
);
2280 * flexonenand_get_size - Fill up fields in onenand_chip and mtd_info
2281 * boundary[], diesize[], mtd->size, mtd->erasesize,
2283 * @param mtd - MTD device structure
2285 static void flexonenand_get_size(struct mtd_info
*mtd
)
2287 struct onenand_chip
*this = mtd
->priv
;
2288 int die
, i
, eraseshift
, density
;
2289 int blksperdie
, maxbdry
;
2292 density
= onenand_get_density(this->device_id
);
2293 blksperdie
= ((loff_t
)(16 << density
) << 20) >> (this->erase_shift
);
2294 blksperdie
>>= ONENAND_IS_DDP(this) ? 1 : 0;
2295 maxbdry
= blksperdie
- 1;
2296 eraseshift
= this->erase_shift
- 1;
2298 mtd
->numeraseregions
= this->dies
<< 1;
2300 /* This fills up the device boundary */
2301 flexonenand_get_boundary(mtd
);
2305 for (; die
< this->dies
; die
++) {
2306 if (!die
|| this->boundary
[die
-1] != maxbdry
) {
2308 mtd
->eraseregions
[i
].offset
= ofs
;
2309 mtd
->eraseregions
[i
].erasesize
= 1 << eraseshift
;
2310 mtd
->eraseregions
[i
].numblocks
=
2311 this->boundary
[die
] + 1;
2312 ofs
+= mtd
->eraseregions
[i
].numblocks
<< eraseshift
;
2315 mtd
->numeraseregions
-= 1;
2316 mtd
->eraseregions
[i
].numblocks
+=
2317 this->boundary
[die
] + 1;
2318 ofs
+= (this->boundary
[die
] + 1) << (eraseshift
- 1);
2320 if (this->boundary
[die
] != maxbdry
) {
2322 mtd
->eraseregions
[i
].offset
= ofs
;
2323 mtd
->eraseregions
[i
].erasesize
= 1 << eraseshift
;
2324 mtd
->eraseregions
[i
].numblocks
= maxbdry
^
2325 this->boundary
[die
];
2326 ofs
+= mtd
->eraseregions
[i
].numblocks
<< eraseshift
;
2329 mtd
->numeraseregions
-= 1;
2332 /* Expose MLC erase size except when all blocks are SLC */
2333 mtd
->erasesize
= 1 << this->erase_shift
;
2334 if (mtd
->numeraseregions
== 1)
2335 mtd
->erasesize
>>= 1;
2337 printk(KERN_INFO
"Device has %d eraseregions\n", mtd
->numeraseregions
);
2338 for (i
= 0; i
< mtd
->numeraseregions
; i
++)
2339 printk(KERN_INFO
"[offset: 0x%08llx, erasesize: 0x%05x,"
2340 " numblocks: %04u]\n", mtd
->eraseregions
[i
].offset
,
2341 mtd
->eraseregions
[i
].erasesize
,
2342 mtd
->eraseregions
[i
].numblocks
);
2344 for (die
= 0, mtd
->size
= 0; die
< this->dies
; die
++) {
2345 this->diesize
[die
] = (loff_t
) (blksperdie
<< this->erase_shift
);
2346 this->diesize
[die
] -= (loff_t
) (this->boundary
[die
] + 1)
2347 << (this->erase_shift
- 1);
2348 mtd
->size
+= this->diesize
[die
];
2353 * flexonenand_check_blocks_erased - Check if blocks are erased
2354 * @param mtd_info - mtd info structure
2355 * @param start - first erase block to check
2356 * @param end - last erase block to check
2358 * Converting an unerased block from MLC to SLC
2359 * causes byte values to change. Since both data and its ECC
2360 * have changed, reads on the block give uncorrectable error.
2361 * This might lead to the block being detected as bad.
2363 * Avoid this by ensuring that the block to be converted is
2366 static int flexonenand_check_blocks_erased(struct mtd_info
*mtd
,
2369 struct onenand_chip
*this = mtd
->priv
;
2372 struct mtd_oob_ops ops
= {
2373 .mode
= MTD_OPS_PLACE_OOB
,
2375 .ooblen
= mtd
->oobsize
,
2377 .oobbuf
= this->oob_buf
,
2381 printk(KERN_DEBUG
"Check blocks from %d to %d\n", start
, end
);
2383 for (block
= start
; block
<= end
; block
++) {
2384 addr
= flexonenand_addr(this, block
);
2385 if (onenand_block_isbad_nolock(mtd
, addr
, 0))
2389 * Since main area write results in ECC write to spare,
2390 * it is sufficient to check only ECC bytes for change.
2392 ret
= onenand_read_oob_nolock(mtd
, addr
, &ops
);
2396 for (i
= 0; i
< mtd
->oobsize
; i
++)
2397 if (this->oob_buf
[i
] != 0xff)
2400 if (i
!= mtd
->oobsize
) {
2401 printk(KERN_WARNING
"Block %d not erased.\n", block
);
2410 * flexonenand_set_boundary - Writes the SLC boundary
2411 * @param mtd - mtd info structure
2413 int flexonenand_set_boundary(struct mtd_info
*mtd
, int die
,
2414 int boundary
, int lock
)
2416 struct onenand_chip
*this = mtd
->priv
;
2417 int ret
, density
, blksperdie
, old
, new, thisboundary
;
2420 if (die
>= this->dies
)
2423 if (boundary
== this->boundary
[die
])
2426 density
= onenand_get_density(this->device_id
);
2427 blksperdie
= ((16 << density
) << 20) >> this->erase_shift
;
2428 blksperdie
>>= ONENAND_IS_DDP(this) ? 1 : 0;
2430 if (boundary
>= blksperdie
) {
2431 printk("flexonenand_set_boundary:"
2432 "Invalid boundary value. "
2433 "Boundary not changed.\n");
2437 /* Check if converting blocks are erased */
2438 old
= this->boundary
[die
] + (die
* this->density_mask
);
2439 new = boundary
+ (die
* this->density_mask
);
2440 ret
= flexonenand_check_blocks_erased(mtd
, min(old
, new)
2441 + 1, max(old
, new));
2443 printk(KERN_ERR
"flexonenand_set_boundary: Please erase blocks before boundary change\n");
2447 this->command(mtd
, FLEXONENAND_CMD_PI_ACCESS
, die
, 0);
2448 this->wait(mtd
, FL_SYNCING
);
2450 /* Check is boundary is locked */
2451 this->command(mtd
, FLEXONENAND_CMD_READ_PI
, die
, 0);
2452 ret
= this->wait(mtd
, FL_READING
);
2454 thisboundary
= this->read_word(this->base
+ ONENAND_DATARAM
);
2455 if ((thisboundary
>> FLEXONENAND_PI_UNLOCK_SHIFT
) != 3) {
2456 printk(KERN_ERR
"flexonenand_set_boundary: boundary locked\n");
2460 printk(KERN_INFO
"flexonenand_set_boundary: Changing die %d boundary: %d%s\n",
2461 die
, boundary
, lock
? "(Locked)" : "(Unlocked)");
2463 boundary
&= FLEXONENAND_PI_MASK
;
2464 boundary
|= lock
? 0 : (3 << FLEXONENAND_PI_UNLOCK_SHIFT
);
2466 addr
= die
? this->diesize
[0] : 0;
2467 this->command(mtd
, ONENAND_CMD_ERASE
, addr
, 0);
2468 ret
= this->wait(mtd
, FL_ERASING
);
2470 printk("flexonenand_set_boundary:"
2471 "Failed PI erase for Die %d\n", die
);
2475 this->write_word(boundary
, this->base
+ ONENAND_DATARAM
);
2476 this->command(mtd
, ONENAND_CMD_PROG
, addr
, 0);
2477 ret
= this->wait(mtd
, FL_WRITING
);
2479 printk("flexonenand_set_boundary:"
2480 "Failed PI write for Die %d\n", die
);
2484 this->command(mtd
, FLEXONENAND_CMD_PI_UPDATE
, die
, 0);
2485 ret
= this->wait(mtd
, FL_WRITING
);
2487 this->write_word(ONENAND_CMD_RESET
, this->base
+ ONENAND_REG_COMMAND
);
2488 this->wait(mtd
, FL_RESETING
);
2490 /* Recalculate device size on boundary change*/
2491 flexonenand_get_size(mtd
);
2497 * onenand_chip_probe - [OneNAND Interface] Probe the OneNAND chip
2498 * @param mtd MTD device structure
2500 * OneNAND detection method:
2501 * Compare the the values from command with ones from register
2503 static int onenand_chip_probe(struct mtd_info
*mtd
)
2505 struct onenand_chip
*this = mtd
->priv
;
2506 int bram_maf_id
, bram_dev_id
, maf_id
, dev_id
;
2509 /* Save system configuration 1 */
2510 syscfg
= this->read_word(this->base
+ ONENAND_REG_SYS_CFG1
);
2512 /* Clear Sync. Burst Read mode to read BootRAM */
2513 this->write_word((syscfg
& ~ONENAND_SYS_CFG1_SYNC_READ
),
2514 this->base
+ ONENAND_REG_SYS_CFG1
);
2516 /* Send the command for reading device ID from BootRAM */
2517 this->write_word(ONENAND_CMD_READID
, this->base
+ ONENAND_BOOTRAM
);
2519 /* Read manufacturer and device IDs from BootRAM */
2520 bram_maf_id
= this->read_word(this->base
+ ONENAND_BOOTRAM
+ 0x0);
2521 bram_dev_id
= this->read_word(this->base
+ ONENAND_BOOTRAM
+ 0x2);
2523 /* Reset OneNAND to read default register values */
2524 this->write_word(ONENAND_CMD_RESET
, this->base
+ ONENAND_BOOTRAM
);
2527 this->wait(mtd
, FL_RESETING
);
2529 /* Restore system configuration 1 */
2530 this->write_word(syscfg
, this->base
+ ONENAND_REG_SYS_CFG1
);
2532 /* Check manufacturer ID */
2533 if (onenand_check_maf(bram_maf_id
))
2536 /* Read manufacturer and device IDs from Register */
2537 maf_id
= this->read_word(this->base
+ ONENAND_REG_MANUFACTURER_ID
);
2538 dev_id
= this->read_word(this->base
+ ONENAND_REG_DEVICE_ID
);
2540 /* Check OneNAND device */
2541 if (maf_id
!= bram_maf_id
|| dev_id
!= bram_dev_id
)
2548 * onenand_probe - [OneNAND Interface] Probe the OneNAND device
2549 * @param mtd MTD device structure
2551 * OneNAND detection method:
2552 * Compare the the values from command with ones from register
2554 int onenand_probe(struct mtd_info
*mtd
)
2556 struct onenand_chip
*this = mtd
->priv
;
2561 ret
= this->chip_probe(mtd
);
2565 /* Read device IDs from Register */
2566 dev_id
= this->read_word(this->base
+ ONENAND_REG_DEVICE_ID
);
2567 ver_id
= this->read_word(this->base
+ ONENAND_REG_VERSION_ID
);
2568 this->technology
= this->read_word(this->base
+ ONENAND_REG_TECHNOLOGY
);
2570 /* Flash device information */
2571 mtd
->name
= onenand_print_device_info(dev_id
, ver_id
);
2572 this->device_id
= dev_id
;
2573 this->version_id
= ver_id
;
2575 /* Check OneNAND features */
2576 onenand_check_features(mtd
);
2578 density
= onenand_get_density(dev_id
);
2579 if (FLEXONENAND(this)) {
2580 this->dies
= ONENAND_IS_DDP(this) ? 2 : 1;
2581 /* Maximum possible erase regions */
2582 mtd
->numeraseregions
= this->dies
<< 1;
2583 mtd
->eraseregions
= malloc(sizeof(struct mtd_erase_region_info
)
2584 * (this->dies
<< 1));
2585 if (!mtd
->eraseregions
)
2590 * For Flex-OneNAND, chipsize represents maximum possible device size.
2591 * mtd->size represents the actual device size.
2593 this->chipsize
= (16 << density
) << 20;
2595 /* OneNAND page size & block size */
2596 /* The data buffer size is equal to page size */
2598 this->read_word(this->base
+ ONENAND_REG_DATA_BUFFER_SIZE
);
2599 /* We use the full BufferRAM */
2600 if (ONENAND_IS_4KB_PAGE(this))
2601 mtd
->writesize
<<= 1;
2603 mtd
->oobsize
= mtd
->writesize
>> 5;
2604 /* Pagers per block is always 64 in OneNAND */
2605 mtd
->erasesize
= mtd
->writesize
<< 6;
2607 * Flex-OneNAND SLC area has 64 pages per block.
2608 * Flex-OneNAND MLC area has 128 pages per block.
2609 * Expose MLC erase size to find erase_shift and page_mask.
2611 if (FLEXONENAND(this))
2612 mtd
->erasesize
<<= 1;
2614 this->erase_shift
= ffs(mtd
->erasesize
) - 1;
2615 this->page_shift
= ffs(mtd
->writesize
) - 1;
2616 this->ppb_shift
= (this->erase_shift
- this->page_shift
);
2617 this->page_mask
= (mtd
->erasesize
/ mtd
->writesize
) - 1;
2618 /* Set density mask. it is used for DDP */
2619 if (ONENAND_IS_DDP(this))
2620 this->density_mask
= this->chipsize
>> (this->erase_shift
+ 1);
2621 /* It's real page size */
2622 this->writesize
= mtd
->writesize
;
2624 /* REVIST: Multichip handling */
2626 if (FLEXONENAND(this))
2627 flexonenand_get_size(mtd
);
2629 mtd
->size
= this->chipsize
;
2631 mtd
->flags
= MTD_CAP_NANDFLASH
;
2632 mtd
->_erase
= onenand_erase
;
2633 mtd
->_read
= onenand_read
;
2634 mtd
->_write
= onenand_write
;
2635 mtd
->_read_oob
= onenand_read_oob
;
2636 mtd
->_write_oob
= onenand_write_oob
;
2637 mtd
->_sync
= onenand_sync
;
2638 mtd
->_block_isbad
= onenand_block_isbad
;
2639 mtd
->_block_markbad
= onenand_block_markbad
;
2645 * onenand_scan - [OneNAND Interface] Scan for the OneNAND device
2646 * @param mtd MTD device structure
2647 * @param maxchips Number of chips to scan for
2649 * This fills out all the not initialized function pointers
2650 * with the defaults.
2651 * The flash ID is read and the mtd/chip structures are
2652 * filled with the appropriate values.
2654 int onenand_scan(struct mtd_info
*mtd
, int maxchips
)
2657 struct onenand_chip
*this = mtd
->priv
;
2659 if (!this->read_word
)
2660 this->read_word
= onenand_readw
;
2661 if (!this->write_word
)
2662 this->write_word
= onenand_writew
;
2665 this->command
= onenand_command
;
2667 this->wait
= onenand_wait
;
2668 if (!this->bbt_wait
)
2669 this->bbt_wait
= onenand_bbt_wait
;
2671 if (!this->read_bufferram
)
2672 this->read_bufferram
= onenand_read_bufferram
;
2673 if (!this->write_bufferram
)
2674 this->write_bufferram
= onenand_write_bufferram
;
2676 if (!this->chip_probe
)
2677 this->chip_probe
= onenand_chip_probe
;
2679 if (!this->block_markbad
)
2680 this->block_markbad
= onenand_default_block_markbad
;
2681 if (!this->scan_bbt
)
2682 this->scan_bbt
= onenand_default_bbt
;
2684 if (onenand_probe(mtd
))
2687 /* Set Sync. Burst Read after probing */
2688 if (this->mmcontrol
) {
2689 printk(KERN_INFO
"OneNAND Sync. Burst Read support\n");
2690 this->read_bufferram
= onenand_sync_read_bufferram
;
2693 /* Allocate buffers, if necessary */
2694 if (!this->page_buf
) {
2695 this->page_buf
= kzalloc(mtd
->writesize
, GFP_KERNEL
);
2696 if (!this->page_buf
) {
2697 printk(KERN_ERR
"onenand_scan(): Can't allocate page_buf\n");
2700 this->options
|= ONENAND_PAGEBUF_ALLOC
;
2702 if (!this->oob_buf
) {
2703 this->oob_buf
= kzalloc(mtd
->oobsize
, GFP_KERNEL
);
2704 if (!this->oob_buf
) {
2705 printk(KERN_ERR
"onenand_scan: Can't allocate oob_buf\n");
2706 if (this->options
& ONENAND_PAGEBUF_ALLOC
) {
2707 this->options
&= ~ONENAND_PAGEBUF_ALLOC
;
2708 kfree(this->page_buf
);
2712 this->options
|= ONENAND_OOBBUF_ALLOC
;
2715 this->state
= FL_READY
;
2718 * Allow subpage writes up to oobsize.
2720 switch (mtd
->oobsize
) {
2722 this->ecclayout
= &onenand_oob_128
;
2723 mtd
->subpage_sft
= 0;
2727 this->ecclayout
= &onenand_oob_64
;
2728 mtd
->subpage_sft
= 2;
2732 this->ecclayout
= &onenand_oob_32
;
2733 mtd
->subpage_sft
= 1;
2737 printk(KERN_WARNING
"No OOB scheme defined for oobsize %d\n",
2739 mtd
->subpage_sft
= 0;
2740 /* To prevent kernel oops */
2741 this->ecclayout
= &onenand_oob_32
;
2745 this->subpagesize
= mtd
->writesize
>> mtd
->subpage_sft
;
2748 * The number of bytes available for a client to place data into
2749 * the out of band area
2751 this->ecclayout
->oobavail
= 0;
2752 for (i
= 0; i
< MTD_MAX_OOBFREE_ENTRIES
&&
2753 this->ecclayout
->oobfree
[i
].length
; i
++)
2754 this->ecclayout
->oobavail
+=
2755 this->ecclayout
->oobfree
[i
].length
;
2756 mtd
->oobavail
= this->ecclayout
->oobavail
;
2758 mtd
->ecclayout
= this->ecclayout
;
2760 /* Unlock whole block */
2761 onenand_unlock_all(mtd
);
2763 return this->scan_bbt(mtd
);
2767 * onenand_release - [OneNAND Interface] Free resources held by the OneNAND device
2768 * @param mtd MTD device structure
2770 void onenand_release(struct mtd_info
*mtd
)