2 * linux/drivers/mtd/onenand/onenand_base.c
4 * Copyright (C) 2005 Samsung Electronics
5 * Kyungmin Park <kyungmin.park@samsung.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/sched.h>
16 #include <linux/jiffies.h>
17 #include <linux/mtd/mtd.h>
18 #include <linux/mtd/onenand.h>
19 #include <linux/mtd/partitions.h>
24 * onenand_oob_64 - oob info for large (2KB) page
26 static struct nand_ecclayout onenand_oob_64
= {
35 {2, 3}, {14, 2}, {18, 3}, {30, 2},
36 {34, 3}, {46, 2}, {50, 3}, {62, 2}
41 * onenand_oob_32 - oob info for middle (1KB) page
43 static struct nand_ecclayout onenand_oob_32
= {
49 .oobfree
= { {2, 3}, {14, 2}, {18, 3}, {30, 2} }
52 static const unsigned char ffchars
[] = {
53 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
54 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 16 */
55 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
56 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 32 */
57 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
58 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 48 */
59 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
60 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 64 */
64 * onenand_readw - [OneNAND Interface] Read OneNAND register
65 * @param addr address to read
67 * Read OneNAND register
69 static unsigned short onenand_readw(void __iomem
*addr
)
75 * onenand_writew - [OneNAND Interface] Write OneNAND register with value
76 * @param value value to write
77 * @param addr address to write
79 * Write OneNAND register with value
81 static void onenand_writew(unsigned short value
, void __iomem
*addr
)
87 * onenand_block_address - [DEFAULT] Get block address
88 * @param this onenand chip data structure
89 * @param block the block
90 * @return translated block address if DDP, otherwise same
92 * Setup Start Address 1 Register (F100h)
94 static int onenand_block_address(struct onenand_chip
*this, int block
)
96 if (this->device_id
& ONENAND_DEVICE_IS_DDP
) {
97 /* Device Flash Core select, NAND Flash Block Address */
100 if (block
& this->density_mask
)
103 return (dfs
<< ONENAND_DDP_SHIFT
) |
104 (block
& (this->density_mask
- 1));
111 * onenand_bufferram_address - [DEFAULT] Get bufferram address
112 * @param this onenand chip data structure
113 * @param block the block
114 * @return set DBS value if DDP, otherwise 0
116 * Setup Start Address 2 Register (F101h) for DDP
118 static int onenand_bufferram_address(struct onenand_chip
*this, int block
)
120 if (this->device_id
& ONENAND_DEVICE_IS_DDP
) {
121 /* Device BufferRAM Select */
124 if (block
& this->density_mask
)
127 return (dbs
<< ONENAND_DDP_SHIFT
);
134 * onenand_page_address - [DEFAULT] Get page address
135 * @param page the page address
136 * @param sector the sector address
137 * @return combined page and sector address
139 * Setup Start Address 8 Register (F107h)
141 static int onenand_page_address(int page
, int sector
)
143 /* Flash Page Address, Flash Sector Address */
146 fpa
= page
& ONENAND_FPA_MASK
;
147 fsa
= sector
& ONENAND_FSA_MASK
;
149 return ((fpa
<< ONENAND_FPA_SHIFT
) | fsa
);
153 * onenand_buffer_address - [DEFAULT] Get buffer address
154 * @param dataram1 DataRAM index
155 * @param sectors the sector address
156 * @param count the number of sectors
157 * @return the start buffer value
159 * Setup Start Buffer Register (F200h)
161 static int onenand_buffer_address(int dataram1
, int sectors
, int count
)
165 /* BufferRAM Sector Address */
166 bsa
= sectors
& ONENAND_BSA_MASK
;
169 bsa
|= ONENAND_BSA_DATARAM1
; /* DataRAM1 */
171 bsa
|= ONENAND_BSA_DATARAM0
; /* DataRAM0 */
173 /* BufferRAM Sector Count */
174 bsc
= count
& ONENAND_BSC_MASK
;
176 return ((bsa
<< ONENAND_BSA_SHIFT
) | bsc
);
180 * onenand_command - [DEFAULT] Send command to OneNAND device
181 * @param mtd MTD device structure
182 * @param cmd the command to be sent
183 * @param addr offset to read from or write to
184 * @param len number of bytes to read or write
186 * Send command to OneNAND device. This function is used for middle/large page
187 * devices (1KB/2KB Bytes per page)
189 static int onenand_command(struct mtd_info
*mtd
, int cmd
, loff_t addr
, size_t len
)
191 struct onenand_chip
*this = mtd
->priv
;
192 int value
, readcmd
= 0, block_cmd
= 0;
194 /* Now we use page size operation */
195 int sectors
= 4, count
= 4;
197 /* Address translation */
199 case ONENAND_CMD_UNLOCK
:
200 case ONENAND_CMD_LOCK
:
201 case ONENAND_CMD_LOCK_TIGHT
:
206 case ONENAND_CMD_ERASE
:
207 case ONENAND_CMD_BUFFERRAM
:
208 case ONENAND_CMD_OTP_ACCESS
:
210 block
= (int) (addr
>> this->erase_shift
);
215 block
= (int) (addr
>> this->erase_shift
);
216 page
= (int) (addr
>> this->page_shift
);
217 page
&= this->page_mask
;
221 /* NOTE: The setting order of the registers is very important! */
222 if (cmd
== ONENAND_CMD_BUFFERRAM
) {
223 /* Select DataRAM for DDP */
224 value
= onenand_bufferram_address(this, block
);
225 this->write_word(value
, this->base
+ ONENAND_REG_START_ADDRESS2
);
227 /* Switch to the next data buffer */
228 ONENAND_SET_NEXT_BUFFERRAM(this);
234 /* Write 'DFS, FBA' of Flash */
235 value
= onenand_block_address(this, block
);
236 this->write_word(value
, this->base
+ ONENAND_REG_START_ADDRESS1
);
239 /* Select DataRAM for DDP */
240 value
= onenand_bufferram_address(this, block
);
241 this->write_word(value
, this->base
+ ONENAND_REG_START_ADDRESS2
);
249 case ONENAND_CMD_READ
:
250 case ONENAND_CMD_READOOB
:
251 dataram
= ONENAND_SET_NEXT_BUFFERRAM(this);
256 dataram
= ONENAND_CURRENT_BUFFERRAM(this);
260 /* Write 'FPA, FSA' of Flash */
261 value
= onenand_page_address(page
, sectors
);
262 this->write_word(value
, this->base
+ ONENAND_REG_START_ADDRESS8
);
264 /* Write 'BSA, BSC' of DataRAM */
265 value
= onenand_buffer_address(dataram
, sectors
, count
);
266 this->write_word(value
, this->base
+ ONENAND_REG_START_BUFFER
);
269 /* Select DataRAM for DDP */
270 value
= onenand_bufferram_address(this, block
);
271 this->write_word(value
, this->base
+ ONENAND_REG_START_ADDRESS2
);
275 /* Interrupt clear */
276 this->write_word(ONENAND_INT_CLEAR
, this->base
+ ONENAND_REG_INTERRUPT
);
279 this->write_word(cmd
, this->base
+ ONENAND_REG_COMMAND
);
285 * onenand_wait - [DEFAULT] wait until the command is done
286 * @param mtd MTD device structure
287 * @param state state to select the max. timeout value
289 * Wait for command done. This applies to all OneNAND command
290 * Read can take up to 30us, erase up to 2ms and program up to 350us
291 * according to general OneNAND specs
293 static int onenand_wait(struct mtd_info
*mtd
, int state
)
295 struct onenand_chip
* this = mtd
->priv
;
296 unsigned long timeout
;
297 unsigned int flags
= ONENAND_INT_MASTER
;
298 unsigned int interrupt
= 0;
299 unsigned int ctrl
, ecc
;
301 /* The 20 msec is enough */
302 timeout
= jiffies
+ msecs_to_jiffies(20);
303 while (time_before(jiffies
, timeout
)) {
304 interrupt
= this->read_word(this->base
+ ONENAND_REG_INTERRUPT
);
306 if (interrupt
& flags
)
309 if (state
!= FL_READING
)
311 touch_softlockup_watchdog();
313 /* To get correct interrupt status in timeout case */
314 interrupt
= this->read_word(this->base
+ ONENAND_REG_INTERRUPT
);
316 ctrl
= this->read_word(this->base
+ ONENAND_REG_CTRL_STATUS
);
318 if (ctrl
& ONENAND_CTRL_ERROR
) {
319 /* It maybe occur at initial bad block */
320 DEBUG(MTD_DEBUG_LEVEL0
, "onenand_wait: controller error = 0x%04x\n", ctrl
);
321 /* Clear other interrupt bits for preventing ECC error */
322 interrupt
&= ONENAND_INT_MASTER
;
325 if (ctrl
& ONENAND_CTRL_LOCK
) {
326 DEBUG(MTD_DEBUG_LEVEL0
, "onenand_wait: it's locked error = 0x%04x\n", ctrl
);
330 if (interrupt
& ONENAND_INT_READ
) {
331 ecc
= this->read_word(this->base
+ ONENAND_REG_ECC_STATUS
);
332 if (ecc
& ONENAND_ECC_2BIT_ALL
) {
333 DEBUG(MTD_DEBUG_LEVEL0
, "onenand_wait: ECC error = 0x%04x\n", ecc
);
342 * onenand_bufferram_offset - [DEFAULT] BufferRAM offset
343 * @param mtd MTD data structure
344 * @param area BufferRAM area
345 * @return offset given area
347 * Return BufferRAM offset given area
349 static inline int onenand_bufferram_offset(struct mtd_info
*mtd
, int area
)
351 struct onenand_chip
*this = mtd
->priv
;
353 if (ONENAND_CURRENT_BUFFERRAM(this)) {
354 if (area
== ONENAND_DATARAM
)
355 return mtd
->writesize
;
356 if (area
== ONENAND_SPARERAM
)
364 * onenand_read_bufferram - [OneNAND Interface] Read the bufferram area
365 * @param mtd MTD data structure
366 * @param area BufferRAM area
367 * @param buffer the databuffer to put/get data
368 * @param offset offset to read from or write to
369 * @param count number of bytes to read/write
371 * Read the BufferRAM area
373 static int onenand_read_bufferram(struct mtd_info
*mtd
, int area
,
374 unsigned char *buffer
, int offset
, size_t count
)
376 struct onenand_chip
*this = mtd
->priv
;
377 void __iomem
*bufferram
;
379 bufferram
= this->base
+ area
;
381 bufferram
+= onenand_bufferram_offset(mtd
, area
);
383 if (ONENAND_CHECK_BYTE_ACCESS(count
)) {
386 /* Align with word(16-bit) size */
389 /* Read word and save byte */
390 word
= this->read_word(bufferram
+ offset
+ count
);
391 buffer
[count
] = (word
& 0xff);
394 memcpy(buffer
, bufferram
+ offset
, count
);
400 * onenand_sync_read_bufferram - [OneNAND Interface] Read the bufferram area with Sync. Burst mode
401 * @param mtd MTD data structure
402 * @param area BufferRAM area
403 * @param buffer the databuffer to put/get data
404 * @param offset offset to read from or write to
405 * @param count number of bytes to read/write
407 * Read the BufferRAM area with Sync. Burst Mode
409 static int onenand_sync_read_bufferram(struct mtd_info
*mtd
, int area
,
410 unsigned char *buffer
, int offset
, size_t count
)
412 struct onenand_chip
*this = mtd
->priv
;
413 void __iomem
*bufferram
;
415 bufferram
= this->base
+ area
;
417 bufferram
+= onenand_bufferram_offset(mtd
, area
);
419 this->mmcontrol(mtd
, ONENAND_SYS_CFG1_SYNC_READ
);
421 if (ONENAND_CHECK_BYTE_ACCESS(count
)) {
424 /* Align with word(16-bit) size */
427 /* Read word and save byte */
428 word
= this->read_word(bufferram
+ offset
+ count
);
429 buffer
[count
] = (word
& 0xff);
432 memcpy(buffer
, bufferram
+ offset
, count
);
434 this->mmcontrol(mtd
, 0);
440 * onenand_write_bufferram - [OneNAND Interface] Write the bufferram area
441 * @param mtd MTD data structure
442 * @param area BufferRAM area
443 * @param buffer the databuffer to put/get data
444 * @param offset offset to read from or write to
445 * @param count number of bytes to read/write
447 * Write the BufferRAM area
449 static int onenand_write_bufferram(struct mtd_info
*mtd
, int area
,
450 const unsigned char *buffer
, int offset
, size_t count
)
452 struct onenand_chip
*this = mtd
->priv
;
453 void __iomem
*bufferram
;
455 bufferram
= this->base
+ area
;
457 bufferram
+= onenand_bufferram_offset(mtd
, area
);
459 if (ONENAND_CHECK_BYTE_ACCESS(count
)) {
463 /* Align with word(16-bit) size */
466 /* Calculate byte access offset */
467 byte_offset
= offset
+ count
;
469 /* Read word and save byte */
470 word
= this->read_word(bufferram
+ byte_offset
);
471 word
= (word
& ~0xff) | buffer
[count
];
472 this->write_word(word
, bufferram
+ byte_offset
);
475 memcpy(bufferram
+ offset
, buffer
, count
);
481 * onenand_check_bufferram - [GENERIC] Check BufferRAM information
482 * @param mtd MTD data structure
483 * @param addr address to check
484 * @return 1 if there are valid data, otherwise 0
486 * Check bufferram if there is data we required
488 static int onenand_check_bufferram(struct mtd_info
*mtd
, loff_t addr
)
490 struct onenand_chip
*this = mtd
->priv
;
494 block
= (int) (addr
>> this->erase_shift
);
495 page
= (int) (addr
>> this->page_shift
);
496 page
&= this->page_mask
;
498 i
= ONENAND_CURRENT_BUFFERRAM(this);
500 /* Is there valid data? */
501 if (this->bufferram
[i
].block
== block
&&
502 this->bufferram
[i
].page
== page
&&
503 this->bufferram
[i
].valid
)
510 * onenand_update_bufferram - [GENERIC] Update BufferRAM information
511 * @param mtd MTD data structure
512 * @param addr address to update
513 * @param valid valid flag
515 * Update BufferRAM information
517 static int onenand_update_bufferram(struct mtd_info
*mtd
, loff_t addr
,
520 struct onenand_chip
*this = mtd
->priv
;
524 block
= (int) (addr
>> this->erase_shift
);
525 page
= (int) (addr
>> this->page_shift
);
526 page
&= this->page_mask
;
528 /* Invalidate BufferRAM */
529 for (i
= 0; i
< MAX_BUFFERRAM
; i
++) {
530 if (this->bufferram
[i
].block
== block
&&
531 this->bufferram
[i
].page
== page
)
532 this->bufferram
[i
].valid
= 0;
535 /* Update BufferRAM */
536 i
= ONENAND_CURRENT_BUFFERRAM(this);
537 this->bufferram
[i
].block
= block
;
538 this->bufferram
[i
].page
= page
;
539 this->bufferram
[i
].valid
= valid
;
545 * onenand_get_device - [GENERIC] Get chip for selected access
546 * @param mtd MTD device structure
547 * @param new_state the state which is requested
549 * Get the device and lock it for exclusive access
551 static int onenand_get_device(struct mtd_info
*mtd
, int new_state
)
553 struct onenand_chip
*this = mtd
->priv
;
554 DECLARE_WAITQUEUE(wait
, current
);
557 * Grab the lock and see if the device is available
560 spin_lock(&this->chip_lock
);
561 if (this->state
== FL_READY
) {
562 this->state
= new_state
;
563 spin_unlock(&this->chip_lock
);
566 if (new_state
== FL_PM_SUSPENDED
) {
567 spin_unlock(&this->chip_lock
);
568 return (this->state
== FL_PM_SUSPENDED
) ? 0 : -EAGAIN
;
570 set_current_state(TASK_UNINTERRUPTIBLE
);
571 add_wait_queue(&this->wq
, &wait
);
572 spin_unlock(&this->chip_lock
);
574 remove_wait_queue(&this->wq
, &wait
);
581 * onenand_release_device - [GENERIC] release chip
582 * @param mtd MTD device structure
584 * Deselect, release chip lock and wake up anyone waiting on the device
586 static void onenand_release_device(struct mtd_info
*mtd
)
588 struct onenand_chip
*this = mtd
->priv
;
590 /* Release the chip */
591 spin_lock(&this->chip_lock
);
592 this->state
= FL_READY
;
594 spin_unlock(&this->chip_lock
);
598 * onenand_read - [MTD Interface] Read data from flash
599 * @param mtd MTD device structure
600 * @param from offset to read from
601 * @param len number of bytes to read
602 * @param retlen pointer to variable to store the number of read bytes
603 * @param buf the databuffer to put data
607 static int onenand_read(struct mtd_info
*mtd
, loff_t from
, size_t len
,
608 size_t *retlen
, u_char
*buf
)
610 struct onenand_chip
*this = mtd
->priv
;
611 int read
= 0, column
;
615 DEBUG(MTD_DEBUG_LEVEL3
, "onenand_read: from = 0x%08x, len = %i\n", (unsigned int) from
, (int) len
);
617 /* Do not allow reads past end of device */
618 if ((from
+ len
) > mtd
->size
) {
619 DEBUG(MTD_DEBUG_LEVEL0
, "onenand_read: Attempt read beyond end of device\n");
624 /* Grab the lock and see if the device is available */
625 onenand_get_device(mtd
, FL_READING
);
627 /* TODO handling oob */
630 thislen
= min_t(int, mtd
->writesize
, len
- read
);
632 column
= from
& (mtd
->writesize
- 1);
633 if (column
+ thislen
> mtd
->writesize
)
634 thislen
= mtd
->writesize
- column
;
636 if (!onenand_check_bufferram(mtd
, from
)) {
637 this->command(mtd
, ONENAND_CMD_READ
, from
, mtd
->writesize
);
639 ret
= this->wait(mtd
, FL_READING
);
640 /* First copy data and check return value for ECC handling */
641 onenand_update_bufferram(mtd
, from
, 1);
644 this->read_bufferram(mtd
, ONENAND_DATARAM
, buf
, column
, thislen
);
652 DEBUG(MTD_DEBUG_LEVEL0
, "onenand_read: read failed = %d\n", ret
);
661 /* Deselect and wake up anyone waiting on the device */
662 onenand_release_device(mtd
);
665 * Return success, if no ECC failures, else -EBADMSG
666 * fs driver will take care of that, because
667 * retlen == desired len and result == -EBADMSG
674 * onenand_do_read_oob - [MTD Interface] OneNAND read out-of-band
675 * @param mtd MTD device structure
676 * @param from offset to read from
677 * @param len number of bytes to read
678 * @param retlen pointer to variable to store the number of read bytes
679 * @param buf the databuffer to put data
681 * OneNAND read out-of-band data from the spare area
683 int onenand_do_read_oob(struct mtd_info
*mtd
, loff_t from
, size_t len
,
684 size_t *retlen
, u_char
*buf
)
686 struct onenand_chip
*this = mtd
->priv
;
687 int read
= 0, thislen
, column
;
690 DEBUG(MTD_DEBUG_LEVEL3
, "onenand_read_oob: from = 0x%08x, len = %i\n", (unsigned int) from
, (int) len
);
692 /* Initialize return length value */
695 /* Do not allow reads past end of device */
696 if (unlikely((from
+ len
) > mtd
->size
)) {
697 DEBUG(MTD_DEBUG_LEVEL0
, "onenand_read_oob: Attempt read beyond end of device\n");
701 /* Grab the lock and see if the device is available */
702 onenand_get_device(mtd
, FL_READING
);
704 column
= from
& (mtd
->oobsize
- 1);
707 thislen
= mtd
->oobsize
- column
;
708 thislen
= min_t(int, thislen
, len
);
710 this->command(mtd
, ONENAND_CMD_READOOB
, from
, mtd
->oobsize
);
712 onenand_update_bufferram(mtd
, from
, 0);
714 ret
= this->wait(mtd
, FL_READING
);
715 /* First copy data and check return value for ECC handling */
717 this->read_bufferram(mtd
, ONENAND_SPARERAM
, buf
, column
, thislen
);
725 DEBUG(MTD_DEBUG_LEVEL0
, "onenand_read_oob: read failed = %d\n", ret
);
734 from
+= mtd
->writesize
;
740 /* Deselect and wake up anyone waiting on the device */
741 onenand_release_device(mtd
);
748 * onenand_read_oob - [MTD Interface] NAND write data and/or out-of-band
749 * @mtd: MTD device structure
750 * @from: offset to read from
751 * @ops: oob operation description structure
753 static int onenand_read_oob(struct mtd_info
*mtd
, loff_t from
,
754 struct mtd_oob_ops
*ops
)
756 BUG_ON(ops
->mode
!= MTD_OOB_PLACE
);
758 return onenand_do_read_oob(mtd
, from
+ ops
->ooboffs
, ops
->len
,
759 &ops
->retlen
, ops
->oobbuf
);
762 #ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE
764 * onenand_verify_oob - [GENERIC] verify the oob contents after a write
765 * @param mtd MTD device structure
766 * @param buf the databuffer to verify
767 * @param to offset to read from
768 * @param len number of bytes to read and compare
771 static int onenand_verify_oob(struct mtd_info
*mtd
, const u_char
*buf
, loff_t to
, int len
)
773 struct onenand_chip
*this = mtd
->priv
;
774 char *readp
= this->page_buf
;
775 int column
= to
& (mtd
->oobsize
- 1);
778 this->command(mtd
, ONENAND_CMD_READOOB
, to
, mtd
->oobsize
);
779 onenand_update_bufferram(mtd
, to
, 0);
780 status
= this->wait(mtd
, FL_READING
);
784 this->read_bufferram(mtd
, ONENAND_SPARERAM
, readp
, column
, len
);
786 for(i
= 0; i
< len
; i
++)
787 if (buf
[i
] != 0xFF && buf
[i
] != readp
[i
])
794 * onenand_verify_page - [GENERIC] verify the chip contents after a write
795 * @param mtd MTD device structure
796 * @param buf the databuffer to verify
798 * Check DataRAM area directly
800 static int onenand_verify_page(struct mtd_info
*mtd
, u_char
*buf
, loff_t addr
)
802 struct onenand_chip
*this = mtd
->priv
;
803 void __iomem
*dataram0
, *dataram1
;
806 this->command(mtd
, ONENAND_CMD_READ
, addr
, mtd
->writesize
);
808 ret
= this->wait(mtd
, FL_READING
);
812 onenand_update_bufferram(mtd
, addr
, 1);
814 /* Check, if the two dataram areas are same */
815 dataram0
= this->base
+ ONENAND_DATARAM
;
816 dataram1
= dataram0
+ mtd
->writesize
;
818 if (memcmp(dataram0
, dataram1
, mtd
->writesize
))
824 #define onenand_verify_page(...) (0)
825 #define onenand_verify_oob(...) (0)
828 #define NOTALIGNED(x) ((x & (mtd->writesize - 1)) != 0)
831 * onenand_write - [MTD Interface] write buffer to FLASH
832 * @param mtd MTD device structure
833 * @param to offset to write to
834 * @param len number of bytes to write
835 * @param retlen pointer to variable to store the number of written bytes
836 * @param buf the data to write
840 static int onenand_write(struct mtd_info
*mtd
, loff_t to
, size_t len
,
841 size_t *retlen
, const u_char
*buf
)
843 struct onenand_chip
*this = mtd
->priv
;
847 DEBUG(MTD_DEBUG_LEVEL3
, "onenand_write: to = 0x%08x, len = %i\n", (unsigned int) to
, (int) len
);
849 /* Initialize retlen, in case of early exit */
852 /* Do not allow writes past end of device */
853 if (unlikely((to
+ len
) > mtd
->size
)) {
854 DEBUG(MTD_DEBUG_LEVEL0
, "onenand_write: Attempt write to past end of device\n");
858 /* Reject writes, which are not page aligned */
859 if (unlikely(NOTALIGNED(to
)) || unlikely(NOTALIGNED(len
))) {
860 DEBUG(MTD_DEBUG_LEVEL0
, "onenand_write: Attempt to write not page aligned data\n");
864 /* Grab the lock and see if the device is available */
865 onenand_get_device(mtd
, FL_WRITING
);
867 /* Loop until all data write */
868 while (written
< len
) {
869 int thislen
= min_t(int, mtd
->writesize
, len
- written
);
871 this->command(mtd
, ONENAND_CMD_BUFFERRAM
, to
, mtd
->writesize
);
873 this->write_bufferram(mtd
, ONENAND_DATARAM
, buf
, 0, thislen
);
874 this->write_bufferram(mtd
, ONENAND_SPARERAM
, ffchars
, 0, mtd
->oobsize
);
876 this->command(mtd
, ONENAND_CMD_PROG
, to
, mtd
->writesize
);
878 onenand_update_bufferram(mtd
, to
, 1);
880 ret
= this->wait(mtd
, FL_WRITING
);
882 DEBUG(MTD_DEBUG_LEVEL0
, "onenand_write: write filaed %d\n", ret
);
888 /* Only check verify write turn on */
889 ret
= onenand_verify_page(mtd
, (u_char
*) buf
, to
);
891 DEBUG(MTD_DEBUG_LEVEL0
, "onenand_write: verify failed %d\n", ret
);
903 /* Deselect and wake up anyone waiting on the device */
904 onenand_release_device(mtd
);
912 * onenand_do_write_oob - [Internal] OneNAND write out-of-band
913 * @param mtd MTD device structure
914 * @param to offset to write to
915 * @param len number of bytes to write
916 * @param retlen pointer to variable to store the number of written bytes
917 * @param buf the data to write
919 * OneNAND write out-of-band
921 static int onenand_do_write_oob(struct mtd_info
*mtd
, loff_t to
, size_t len
,
922 size_t *retlen
, const u_char
*buf
)
924 struct onenand_chip
*this = mtd
->priv
;
928 DEBUG(MTD_DEBUG_LEVEL3
, "onenand_write_oob: to = 0x%08x, len = %i\n", (unsigned int) to
, (int) len
);
930 /* Initialize retlen, in case of early exit */
933 /* Do not allow writes past end of device */
934 if (unlikely((to
+ len
) > mtd
->size
)) {
935 DEBUG(MTD_DEBUG_LEVEL0
, "onenand_write_oob: Attempt write to past end of device\n");
939 /* Grab the lock and see if the device is available */
940 onenand_get_device(mtd
, FL_WRITING
);
942 /* Loop until all data write */
943 while (written
< len
) {
944 int thislen
= min_t(int, mtd
->oobsize
, len
- written
);
946 column
= to
& (mtd
->oobsize
- 1);
948 this->command(mtd
, ONENAND_CMD_BUFFERRAM
, to
, mtd
->oobsize
);
950 /* We send data to spare ram with oobsize
951 * to prevent byte access */
952 memset(this->page_buf
, 0xff, mtd
->oobsize
);
953 memcpy(this->page_buf
+ column
, buf
, thislen
);
954 this->write_bufferram(mtd
, ONENAND_SPARERAM
, this->page_buf
, 0, mtd
->oobsize
);
956 this->command(mtd
, ONENAND_CMD_PROGOOB
, to
, mtd
->oobsize
);
958 onenand_update_bufferram(mtd
, to
, 0);
960 ret
= this->wait(mtd
, FL_WRITING
);
962 DEBUG(MTD_DEBUG_LEVEL0
, "onenand_write_oob: write filaed %d\n", ret
);
966 ret
= onenand_verify_oob(mtd
, buf
, to
, thislen
);
968 DEBUG(MTD_DEBUG_LEVEL0
, "onenand_write_oob: verify failed %d\n", ret
);
982 /* Deselect and wake up anyone waiting on the device */
983 onenand_release_device(mtd
);
991 * onenand_write_oob - [MTD Interface] NAND write data and/or out-of-band
992 * @mtd: MTD device structure
993 * @from: offset to read from
994 * @ops: oob operation description structure
996 static int onenand_write_oob(struct mtd_info
*mtd
, loff_t to
,
997 struct mtd_oob_ops
*ops
)
999 BUG_ON(ops
->mode
!= MTD_OOB_PLACE
);
1001 return onenand_do_write_oob(mtd
, to
+ ops
->ooboffs
, ops
->len
,
1002 &ops
->retlen
, ops
->oobbuf
);
1006 * onenand_block_checkbad - [GENERIC] Check if a block is marked bad
1007 * @param mtd MTD device structure
1008 * @param ofs offset from device start
1009 * @param getchip 0, if the chip is already selected
1010 * @param allowbbt 1, if its allowed to access the bbt area
1012 * Check, if the block is bad. Either by reading the bad block table or
1013 * calling of the scan function.
1015 static int onenand_block_checkbad(struct mtd_info
*mtd
, loff_t ofs
, int getchip
, int allowbbt
)
1017 struct onenand_chip
*this = mtd
->priv
;
1018 struct bbm_info
*bbm
= this->bbm
;
1020 /* Return info from the table */
1021 return bbm
->isbad_bbt(mtd
, ofs
, allowbbt
);
1025 * onenand_erase - [MTD Interface] erase block(s)
1026 * @param mtd MTD device structure
1027 * @param instr erase instruction
1029 * Erase one ore more blocks
1031 static int onenand_erase(struct mtd_info
*mtd
, struct erase_info
*instr
)
1033 struct onenand_chip
*this = mtd
->priv
;
1034 unsigned int block_size
;
1039 DEBUG(MTD_DEBUG_LEVEL3
, "onenand_erase: start = 0x%08x, len = %i\n", (unsigned int) instr
->addr
, (unsigned int) instr
->len
);
1041 block_size
= (1 << this->erase_shift
);
1043 /* Start address must align on block boundary */
1044 if (unlikely(instr
->addr
& (block_size
- 1))) {
1045 DEBUG(MTD_DEBUG_LEVEL0
, "onenand_erase: Unaligned address\n");
1049 /* Length must align on block boundary */
1050 if (unlikely(instr
->len
& (block_size
- 1))) {
1051 DEBUG(MTD_DEBUG_LEVEL0
, "onenand_erase: Length not block aligned\n");
1055 /* Do not allow erase past end of device */
1056 if (unlikely((instr
->len
+ instr
->addr
) > mtd
->size
)) {
1057 DEBUG(MTD_DEBUG_LEVEL0
, "onenand_erase: Erase past end of device\n");
1061 instr
->fail_addr
= 0xffffffff;
1063 /* Grab the lock and see if the device is available */
1064 onenand_get_device(mtd
, FL_ERASING
);
1066 /* Loop throught the pages */
1070 instr
->state
= MTD_ERASING
;
1074 /* Check if we have a bad block, we do not erase bad blocks */
1075 if (onenand_block_checkbad(mtd
, addr
, 0, 0)) {
1076 printk (KERN_WARNING
"onenand_erase: attempt to erase a bad block at addr 0x%08x\n", (unsigned int) addr
);
1077 instr
->state
= MTD_ERASE_FAILED
;
1081 this->command(mtd
, ONENAND_CMD_ERASE
, addr
, block_size
);
1083 ret
= this->wait(mtd
, FL_ERASING
);
1084 /* Check, if it is write protected */
1087 DEBUG(MTD_DEBUG_LEVEL0
, "onenand_erase: Device is write protected!!!\n");
1089 DEBUG(MTD_DEBUG_LEVEL0
, "onenand_erase: Failed erase, block %d\n", (unsigned) (addr
>> this->erase_shift
));
1090 instr
->state
= MTD_ERASE_FAILED
;
1091 instr
->fail_addr
= addr
;
1099 instr
->state
= MTD_ERASE_DONE
;
1103 ret
= instr
->state
== MTD_ERASE_DONE
? 0 : -EIO
;
1104 /* Do call back function */
1106 mtd_erase_callback(instr
);
1108 /* Deselect and wake up anyone waiting on the device */
1109 onenand_release_device(mtd
);
1115 * onenand_sync - [MTD Interface] sync
1116 * @param mtd MTD device structure
1118 * Sync is actually a wait for chip ready function
1120 static void onenand_sync(struct mtd_info
*mtd
)
1122 DEBUG(MTD_DEBUG_LEVEL3
, "onenand_sync: called\n");
1124 /* Grab the lock and see if the device is available */
1125 onenand_get_device(mtd
, FL_SYNCING
);
1127 /* Release it and go back */
1128 onenand_release_device(mtd
);
1133 * onenand_block_isbad - [MTD Interface] Check whether the block at the given offset is bad
1134 * @param mtd MTD device structure
1135 * @param ofs offset relative to mtd start
1137 * Check whether the block is bad
1139 static int onenand_block_isbad(struct mtd_info
*mtd
, loff_t ofs
)
1141 /* Check for invalid offset */
1142 if (ofs
> mtd
->size
)
1145 return onenand_block_checkbad(mtd
, ofs
, 1, 0);
1149 * onenand_default_block_markbad - [DEFAULT] mark a block bad
1150 * @param mtd MTD device structure
1151 * @param ofs offset from device start
1153 * This is the default implementation, which can be overridden by
1154 * a hardware specific driver.
1156 static int onenand_default_block_markbad(struct mtd_info
*mtd
, loff_t ofs
)
1158 struct onenand_chip
*this = mtd
->priv
;
1159 struct bbm_info
*bbm
= this->bbm
;
1160 u_char buf
[2] = {0, 0};
1164 /* Get block number */
1165 block
= ((int) ofs
) >> bbm
->bbt_erase_shift
;
1167 bbm
->bbt
[block
>> 2] |= 0x01 << ((block
& 0x03) << 1);
1169 /* We write two bytes, so we dont have to mess with 16 bit access */
1170 ofs
+= mtd
->oobsize
+ (bbm
->badblockpos
& ~0x01);
1171 return onenand_do_write_oob(mtd
, ofs
, 2, &retlen
, buf
);
1175 * onenand_block_markbad - [MTD Interface] Mark the block at the given offset as bad
1176 * @param mtd MTD device structure
1177 * @param ofs offset relative to mtd start
1179 * Mark the block as bad
1181 static int onenand_block_markbad(struct mtd_info
*mtd
, loff_t ofs
)
1183 struct onenand_chip
*this = mtd
->priv
;
1186 ret
= onenand_block_isbad(mtd
, ofs
);
1188 /* If it was bad already, return success and do nothing */
1194 return this->block_markbad(mtd
, ofs
);
1198 * onenand_unlock - [MTD Interface] Unlock block(s)
1199 * @param mtd MTD device structure
1200 * @param ofs offset relative to mtd start
1201 * @param len number of bytes to unlock
1203 * Unlock one or more blocks
1205 static int onenand_unlock(struct mtd_info
*mtd
, loff_t ofs
, size_t len
)
1207 struct onenand_chip
*this = mtd
->priv
;
1208 int start
, end
, block
, value
, status
;
1210 start
= ofs
>> this->erase_shift
;
1211 end
= len
>> this->erase_shift
;
1213 /* Continuous lock scheme */
1214 if (this->options
& ONENAND_CONT_LOCK
) {
1215 /* Set start block address */
1216 this->write_word(start
, this->base
+ ONENAND_REG_START_BLOCK_ADDRESS
);
1217 /* Set end block address */
1218 this->write_word(end
- 1, this->base
+ ONENAND_REG_END_BLOCK_ADDRESS
);
1219 /* Write unlock command */
1220 this->command(mtd
, ONENAND_CMD_UNLOCK
, 0, 0);
1222 /* There's no return value */
1223 this->wait(mtd
, FL_UNLOCKING
);
1226 while (this->read_word(this->base
+ ONENAND_REG_CTRL_STATUS
)
1227 & ONENAND_CTRL_ONGO
)
1230 /* Check lock status */
1231 status
= this->read_word(this->base
+ ONENAND_REG_WP_STATUS
);
1232 if (!(status
& ONENAND_WP_US
))
1233 printk(KERN_ERR
"wp status = 0x%x\n", status
);
1238 /* Block lock scheme */
1239 for (block
= start
; block
< end
; block
++) {
1240 /* Set block address */
1241 value
= onenand_block_address(this, block
);
1242 this->write_word(value
, this->base
+ ONENAND_REG_START_ADDRESS1
);
1243 /* Select DataRAM for DDP */
1244 value
= onenand_bufferram_address(this, block
);
1245 this->write_word(value
, this->base
+ ONENAND_REG_START_ADDRESS2
);
1246 /* Set start block address */
1247 this->write_word(block
, this->base
+ ONENAND_REG_START_BLOCK_ADDRESS
);
1248 /* Write unlock command */
1249 this->command(mtd
, ONENAND_CMD_UNLOCK
, 0, 0);
1251 /* There's no return value */
1252 this->wait(mtd
, FL_UNLOCKING
);
1255 while (this->read_word(this->base
+ ONENAND_REG_CTRL_STATUS
)
1256 & ONENAND_CTRL_ONGO
)
1259 /* Check lock status */
1260 status
= this->read_word(this->base
+ ONENAND_REG_WP_STATUS
);
1261 if (!(status
& ONENAND_WP_US
))
1262 printk(KERN_ERR
"block = %d, wp status = 0x%x\n", block
, status
);
1268 #ifdef CONFIG_MTD_ONENAND_OTP
1270 /* Interal OTP operation */
1271 typedef int (*otp_op_t
)(struct mtd_info
*mtd
, loff_t form
, size_t len
,
1272 size_t *retlen
, u_char
*buf
);
1275 * do_otp_read - [DEFAULT] Read OTP block area
1276 * @param mtd MTD device structure
1277 * @param from The offset to read
1278 * @param len number of bytes to read
1279 * @param retlen pointer to variable to store the number of readbytes
1280 * @param buf the databuffer to put/get data
1282 * Read OTP block area.
1284 static int do_otp_read(struct mtd_info
*mtd
, loff_t from
, size_t len
,
1285 size_t *retlen
, u_char
*buf
)
1287 struct onenand_chip
*this = mtd
->priv
;
1290 /* Enter OTP access mode */
1291 this->command(mtd
, ONENAND_CMD_OTP_ACCESS
, 0, 0);
1292 this->wait(mtd
, FL_OTPING
);
1294 ret
= mtd
->read(mtd
, from
, len
, retlen
, buf
);
1296 /* Exit OTP access mode */
1297 this->command(mtd
, ONENAND_CMD_RESET
, 0, 0);
1298 this->wait(mtd
, FL_RESETING
);
1304 * do_otp_write - [DEFAULT] Write OTP block area
1305 * @param mtd MTD device structure
1306 * @param from The offset to write
1307 * @param len number of bytes to write
1308 * @param retlen pointer to variable to store the number of write bytes
1309 * @param buf the databuffer to put/get data
1311 * Write OTP block area.
1313 static int do_otp_write(struct mtd_info
*mtd
, loff_t from
, size_t len
,
1314 size_t *retlen
, u_char
*buf
)
1316 struct onenand_chip
*this = mtd
->priv
;
1317 unsigned char *pbuf
= buf
;
1320 /* Force buffer page aligned */
1321 if (len
< mtd
->writesize
) {
1322 memcpy(this->page_buf
, buf
, len
);
1323 memset(this->page_buf
+ len
, 0xff, mtd
->writesize
- len
);
1324 pbuf
= this->page_buf
;
1325 len
= mtd
->writesize
;
1328 /* Enter OTP access mode */
1329 this->command(mtd
, ONENAND_CMD_OTP_ACCESS
, 0, 0);
1330 this->wait(mtd
, FL_OTPING
);
1332 ret
= mtd
->write(mtd
, from
, len
, retlen
, pbuf
);
1334 /* Exit OTP access mode */
1335 this->command(mtd
, ONENAND_CMD_RESET
, 0, 0);
1336 this->wait(mtd
, FL_RESETING
);
1342 * do_otp_lock - [DEFAULT] Lock OTP block area
1343 * @param mtd MTD device structure
1344 * @param from The offset to lock
1345 * @param len number of bytes to lock
1346 * @param retlen pointer to variable to store the number of lock bytes
1347 * @param buf the databuffer to put/get data
1349 * Lock OTP block area.
1351 static int do_otp_lock(struct mtd_info
*mtd
, loff_t from
, size_t len
,
1352 size_t *retlen
, u_char
*buf
)
1354 struct onenand_chip
*this = mtd
->priv
;
1357 /* Enter OTP access mode */
1358 this->command(mtd
, ONENAND_CMD_OTP_ACCESS
, 0, 0);
1359 this->wait(mtd
, FL_OTPING
);
1361 ret
= onenand_do_write_oob(mtd
, from
, len
, retlen
, buf
);
1363 /* Exit OTP access mode */
1364 this->command(mtd
, ONENAND_CMD_RESET
, 0, 0);
1365 this->wait(mtd
, FL_RESETING
);
1371 * onenand_otp_walk - [DEFAULT] Handle OTP operation
1372 * @param mtd MTD device structure
1373 * @param from The offset to read/write
1374 * @param len number of bytes to read/write
1375 * @param retlen pointer to variable to store the number of read bytes
1376 * @param buf the databuffer to put/get data
1377 * @param action do given action
1378 * @param mode specify user and factory
1380 * Handle OTP operation.
1382 static int onenand_otp_walk(struct mtd_info
*mtd
, loff_t from
, size_t len
,
1383 size_t *retlen
, u_char
*buf
,
1384 otp_op_t action
, int mode
)
1386 struct onenand_chip
*this = mtd
->priv
;
1393 density
= this->device_id
>> ONENAND_DEVICE_DENSITY_SHIFT
;
1394 if (density
< ONENAND_DEVICE_DENSITY_512Mb
)
1399 if (mode
== MTD_OTP_FACTORY
) {
1400 from
+= mtd
->writesize
* otp_pages
;
1401 otp_pages
= 64 - otp_pages
;
1404 /* Check User/Factory boundary */
1405 if (((mtd
->writesize
* otp_pages
) - (from
+ len
)) < 0)
1408 while (len
> 0 && otp_pages
> 0) {
1409 if (!action
) { /* OTP Info functions */
1410 struct otp_info
*otpinfo
;
1412 len
-= sizeof(struct otp_info
);
1416 otpinfo
= (struct otp_info
*) buf
;
1417 otpinfo
->start
= from
;
1418 otpinfo
->length
= mtd
->writesize
;
1419 otpinfo
->locked
= 0;
1421 from
+= mtd
->writesize
;
1422 buf
+= sizeof(struct otp_info
);
1423 *retlen
+= sizeof(struct otp_info
);
1428 ret
= action(mtd
, from
, len
, &tmp_retlen
, buf
);
1444 * onenand_get_fact_prot_info - [MTD Interface] Read factory OTP info
1445 * @param mtd MTD device structure
1446 * @param buf the databuffer to put/get data
1447 * @param len number of bytes to read
1449 * Read factory OTP info.
1451 static int onenand_get_fact_prot_info(struct mtd_info
*mtd
,
1452 struct otp_info
*buf
, size_t len
)
1457 ret
= onenand_otp_walk(mtd
, 0, len
, &retlen
, (u_char
*) buf
, NULL
, MTD_OTP_FACTORY
);
1459 return ret
? : retlen
;
1463 * onenand_read_fact_prot_reg - [MTD Interface] Read factory OTP area
1464 * @param mtd MTD device structure
1465 * @param from The offset to read
1466 * @param len number of bytes to read
1467 * @param retlen pointer to variable to store the number of read bytes
1468 * @param buf the databuffer to put/get data
1470 * Read factory OTP area.
1472 static int onenand_read_fact_prot_reg(struct mtd_info
*mtd
, loff_t from
,
1473 size_t len
, size_t *retlen
, u_char
*buf
)
1475 return onenand_otp_walk(mtd
, from
, len
, retlen
, buf
, do_otp_read
, MTD_OTP_FACTORY
);
1479 * onenand_get_user_prot_info - [MTD Interface] Read user OTP info
1480 * @param mtd MTD device structure
1481 * @param buf the databuffer to put/get data
1482 * @param len number of bytes to read
1484 * Read user OTP info.
1486 static int onenand_get_user_prot_info(struct mtd_info
*mtd
,
1487 struct otp_info
*buf
, size_t len
)
1492 ret
= onenand_otp_walk(mtd
, 0, len
, &retlen
, (u_char
*) buf
, NULL
, MTD_OTP_USER
);
1494 return ret
? : retlen
;
1498 * onenand_read_user_prot_reg - [MTD Interface] Read user OTP area
1499 * @param mtd MTD device structure
1500 * @param from The offset to read
1501 * @param len number of bytes to read
1502 * @param retlen pointer to variable to store the number of read bytes
1503 * @param buf the databuffer to put/get data
1505 * Read user OTP area.
1507 static int onenand_read_user_prot_reg(struct mtd_info
*mtd
, loff_t from
,
1508 size_t len
, size_t *retlen
, u_char
*buf
)
1510 return onenand_otp_walk(mtd
, from
, len
, retlen
, buf
, do_otp_read
, MTD_OTP_USER
);
1514 * onenand_write_user_prot_reg - [MTD Interface] Write user OTP area
1515 * @param mtd MTD device structure
1516 * @param from The offset to write
1517 * @param len number of bytes to write
1518 * @param retlen pointer to variable to store the number of write bytes
1519 * @param buf the databuffer to put/get data
1521 * Write user OTP area.
1523 static int onenand_write_user_prot_reg(struct mtd_info
*mtd
, loff_t from
,
1524 size_t len
, size_t *retlen
, u_char
*buf
)
1526 return onenand_otp_walk(mtd
, from
, len
, retlen
, buf
, do_otp_write
, MTD_OTP_USER
);
1530 * onenand_lock_user_prot_reg - [MTD Interface] Lock user OTP area
1531 * @param mtd MTD device structure
1532 * @param from The offset to lock
1533 * @param len number of bytes to unlock
1535 * Write lock mark on spare area in page 0 in OTP block
1537 static int onenand_lock_user_prot_reg(struct mtd_info
*mtd
, loff_t from
,
1540 unsigned char oob_buf
[64];
1544 memset(oob_buf
, 0xff, mtd
->oobsize
);
1546 * Note: OTP lock operation
1547 * OTP block : 0xXXFC
1548 * 1st block : 0xXXF3 (If chip support)
1549 * Both : 0xXXF0 (If chip support)
1551 oob_buf
[ONENAND_OTP_LOCK_OFFSET
] = 0xFC;
1554 * Write lock mark to 8th word of sector0 of page0 of the spare0.
1555 * We write 16 bytes spare area instead of 2 bytes.
1560 ret
= onenand_otp_walk(mtd
, from
, len
, &retlen
, oob_buf
, do_otp_lock
, MTD_OTP_USER
);
1562 return ret
? : retlen
;
1564 #endif /* CONFIG_MTD_ONENAND_OTP */
1567 * onenand_print_device_info - Print device ID
1568 * @param device device ID
1572 static void onenand_print_device_info(int device
)
1574 int vcc
, demuxed
, ddp
, density
;
1576 vcc
= device
& ONENAND_DEVICE_VCC_MASK
;
1577 demuxed
= device
& ONENAND_DEVICE_IS_DEMUX
;
1578 ddp
= device
& ONENAND_DEVICE_IS_DDP
;
1579 density
= device
>> ONENAND_DEVICE_DENSITY_SHIFT
;
1580 printk(KERN_INFO
"%sOneNAND%s %dMB %sV 16-bit (0x%02x)\n",
1581 demuxed
? "" : "Muxed ",
1584 vcc
? "2.65/3.3" : "1.8",
1588 static const struct onenand_manufacturers onenand_manuf_ids
[] = {
1589 {ONENAND_MFR_SAMSUNG
, "Samsung"},
1593 * onenand_check_maf - Check manufacturer ID
1594 * @param manuf manufacturer ID
1596 * Check manufacturer ID
1598 static int onenand_check_maf(int manuf
)
1600 int size
= ARRAY_SIZE(onenand_manuf_ids
);
1604 for (i
= 0; i
< size
; i
++)
1605 if (manuf
== onenand_manuf_ids
[i
].id
)
1609 name
= onenand_manuf_ids
[i
].name
;
1613 printk(KERN_DEBUG
"OneNAND Manufacturer: %s (0x%0x)\n", name
, manuf
);
1619 * onenand_probe - [OneNAND Interface] Probe the OneNAND device
1620 * @param mtd MTD device structure
1622 * OneNAND detection method:
1623 * Compare the the values from command with ones from register
1625 static int onenand_probe(struct mtd_info
*mtd
)
1627 struct onenand_chip
*this = mtd
->priv
;
1628 int bram_maf_id
, bram_dev_id
, maf_id
, dev_id
;
1632 /* Send the command for reading device ID from BootRAM */
1633 this->write_word(ONENAND_CMD_READID
, this->base
+ ONENAND_BOOTRAM
);
1635 /* Read manufacturer and device IDs from BootRAM */
1636 bram_maf_id
= this->read_word(this->base
+ ONENAND_BOOTRAM
+ 0x0);
1637 bram_dev_id
= this->read_word(this->base
+ ONENAND_BOOTRAM
+ 0x2);
1639 /* Check manufacturer ID */
1640 if (onenand_check_maf(bram_maf_id
))
1643 /* Reset OneNAND to read default register values */
1644 this->write_word(ONENAND_CMD_RESET
, this->base
+ ONENAND_BOOTRAM
);
1646 /* Read manufacturer and device IDs from Register */
1647 maf_id
= this->read_word(this->base
+ ONENAND_REG_MANUFACTURER_ID
);
1648 dev_id
= this->read_word(this->base
+ ONENAND_REG_DEVICE_ID
);
1650 /* Check OneNAND device */
1651 if (maf_id
!= bram_maf_id
|| dev_id
!= bram_dev_id
)
1654 /* Flash device information */
1655 onenand_print_device_info(dev_id
);
1656 this->device_id
= dev_id
;
1658 density
= dev_id
>> ONENAND_DEVICE_DENSITY_SHIFT
;
1659 this->chipsize
= (16 << density
) << 20;
1660 /* Set density mask. it is used for DDP */
1661 this->density_mask
= (1 << (density
+ 6));
1663 /* OneNAND page size & block size */
1664 /* The data buffer size is equal to page size */
1665 mtd
->writesize
= this->read_word(this->base
+ ONENAND_REG_DATA_BUFFER_SIZE
);
1666 mtd
->oobsize
= mtd
->writesize
>> 5;
1667 /* Pagers per block is always 64 in OneNAND */
1668 mtd
->erasesize
= mtd
->writesize
<< 6;
1670 this->erase_shift
= ffs(mtd
->erasesize
) - 1;
1671 this->page_shift
= ffs(mtd
->writesize
) - 1;
1672 this->ppb_shift
= (this->erase_shift
- this->page_shift
);
1673 this->page_mask
= (mtd
->erasesize
/ mtd
->writesize
) - 1;
1675 /* REVIST: Multichip handling */
1677 mtd
->size
= this->chipsize
;
1680 version_id
= this->read_word(this->base
+ ONENAND_REG_VERSION_ID
);
1681 printk(KERN_DEBUG
"OneNAND version = 0x%04x\n", version_id
);
1684 if (density
<= ONENAND_DEVICE_DENSITY_512Mb
&&
1685 !(version_id
>> ONENAND_VERSION_PROCESS_SHIFT
)) {
1686 printk(KERN_INFO
"Lock scheme is Continues Lock\n");
1687 this->options
|= ONENAND_CONT_LOCK
;
1694 * onenand_suspend - [MTD Interface] Suspend the OneNAND flash
1695 * @param mtd MTD device structure
1697 static int onenand_suspend(struct mtd_info
*mtd
)
1699 return onenand_get_device(mtd
, FL_PM_SUSPENDED
);
1703 * onenand_resume - [MTD Interface] Resume the OneNAND flash
1704 * @param mtd MTD device structure
1706 static void onenand_resume(struct mtd_info
*mtd
)
1708 struct onenand_chip
*this = mtd
->priv
;
1710 if (this->state
== FL_PM_SUSPENDED
)
1711 onenand_release_device(mtd
);
1713 printk(KERN_ERR
"resume() called for the chip which is not"
1714 "in suspended state\n");
1718 * onenand_scan - [OneNAND Interface] Scan for the OneNAND device
1719 * @param mtd MTD device structure
1720 * @param maxchips Number of chips to scan for
1722 * This fills out all the not initialized function pointers
1723 * with the defaults.
1724 * The flash ID is read and the mtd/chip structures are
1725 * filled with the appropriate values.
1727 int onenand_scan(struct mtd_info
*mtd
, int maxchips
)
1729 struct onenand_chip
*this = mtd
->priv
;
1731 if (!this->read_word
)
1732 this->read_word
= onenand_readw
;
1733 if (!this->write_word
)
1734 this->write_word
= onenand_writew
;
1737 this->command
= onenand_command
;
1739 this->wait
= onenand_wait
;
1741 if (!this->read_bufferram
)
1742 this->read_bufferram
= onenand_read_bufferram
;
1743 if (!this->write_bufferram
)
1744 this->write_bufferram
= onenand_write_bufferram
;
1746 if (!this->block_markbad
)
1747 this->block_markbad
= onenand_default_block_markbad
;
1748 if (!this->scan_bbt
)
1749 this->scan_bbt
= onenand_default_bbt
;
1751 if (onenand_probe(mtd
))
1754 /* Set Sync. Burst Read after probing */
1755 if (this->mmcontrol
) {
1756 printk(KERN_INFO
"OneNAND Sync. Burst Read support\n");
1757 this->read_bufferram
= onenand_sync_read_bufferram
;
1760 /* Allocate buffers, if necessary */
1761 if (!this->page_buf
) {
1763 len
= mtd
->writesize
+ mtd
->oobsize
;
1764 this->page_buf
= kmalloc(len
, GFP_KERNEL
);
1765 if (!this->page_buf
) {
1766 printk(KERN_ERR
"onenand_scan(): Can't allocate page_buf\n");
1769 this->options
|= ONENAND_PAGEBUF_ALLOC
;
1772 this->state
= FL_READY
;
1773 init_waitqueue_head(&this->wq
);
1774 spin_lock_init(&this->chip_lock
);
1776 switch (mtd
->oobsize
) {
1778 this->ecclayout
= &onenand_oob_64
;
1782 this->ecclayout
= &onenand_oob_32
;
1786 printk(KERN_WARNING
"No OOB scheme defined for oobsize %d\n",
1788 /* To prevent kernel oops */
1789 this->ecclayout
= &onenand_oob_32
;
1793 mtd
->ecclayout
= this->ecclayout
;
1795 /* Fill in remaining MTD driver data */
1796 mtd
->type
= MTD_NANDFLASH
;
1797 mtd
->flags
= MTD_CAP_NANDFLASH
;
1798 mtd
->ecctype
= MTD_ECC_SW
;
1799 mtd
->erase
= onenand_erase
;
1801 mtd
->unpoint
= NULL
;
1802 mtd
->read
= onenand_read
;
1803 mtd
->write
= onenand_write
;
1804 mtd
->read_oob
= onenand_read_oob
;
1805 mtd
->write_oob
= onenand_write_oob
;
1806 #ifdef CONFIG_MTD_ONENAND_OTP
1807 mtd
->get_fact_prot_info
= onenand_get_fact_prot_info
;
1808 mtd
->read_fact_prot_reg
= onenand_read_fact_prot_reg
;
1809 mtd
->get_user_prot_info
= onenand_get_user_prot_info
;
1810 mtd
->read_user_prot_reg
= onenand_read_user_prot_reg
;
1811 mtd
->write_user_prot_reg
= onenand_write_user_prot_reg
;
1812 mtd
->lock_user_prot_reg
= onenand_lock_user_prot_reg
;
1814 mtd
->sync
= onenand_sync
;
1816 mtd
->unlock
= onenand_unlock
;
1817 mtd
->suspend
= onenand_suspend
;
1818 mtd
->resume
= onenand_resume
;
1819 mtd
->block_isbad
= onenand_block_isbad
;
1820 mtd
->block_markbad
= onenand_block_markbad
;
1821 mtd
->owner
= THIS_MODULE
;
1823 /* Unlock whole block */
1824 mtd
->unlock(mtd
, 0x0, this->chipsize
);
1826 return this->scan_bbt(mtd
);
1830 * onenand_release - [OneNAND Interface] Free resources held by the OneNAND device
1831 * @param mtd MTD device structure
1833 void onenand_release(struct mtd_info
*mtd
)
1835 struct onenand_chip
*this = mtd
->priv
;
1837 #ifdef CONFIG_MTD_PARTITIONS
1838 /* Deregister partitions */
1839 del_mtd_partitions (mtd
);
1841 /* Deregister the device */
1842 del_mtd_device (mtd
);
1844 /* Free bad block table memory, if allocated */
1847 /* Buffer allocated by onenand_scan */
1848 if (this->options
& ONENAND_PAGEBUF_ALLOC
)
1849 kfree(this->page_buf
);
1852 EXPORT_SYMBOL_GPL(onenand_scan
);
1853 EXPORT_SYMBOL_GPL(onenand_release
);
1855 MODULE_LICENSE("GPL");
1856 MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
1857 MODULE_DESCRIPTION("Generic OneNAND flash driver code");