2 * drivers/mtd/nand/diskonchip.c
4 * (C) 2003 Red Hat, Inc.
5 * (C) 2004 Dan Brown <dan_brown@ieee.org>
6 * (C) 2004 Kalev Lember <kalev@smartlink.ee>
8 * Author: David Woodhouse <dwmw2@infradead.org>
9 * Additional Diskonchip 2000 and Millennium support by Dan Brown <dan_brown@ieee.org>
10 * Diskonchip Millennium Plus support by Kalev Lember <kalev@smartlink.ee>
12 * Error correction code lifted from the old docecc code
13 * Author: Fabrice Bellard (fabrice.bellard@netgem.com)
14 * Copyright (C) 2000 Netgem S.A.
15 * converted to the generic Reed-Solomon library by Thomas Gleixner <tglx@linutronix.de>
17 * Interface to generic NAND code for M-Systems DiskOnChip devices
22 #include <linux/kernel.h>
23 #include <linux/init.h>
24 #include <linux/sched.h>
25 #include <linux/delay.h>
26 #include <linux/rslib.h>
27 #include <linux/moduleparam.h>
30 #include <linux/mtd/mtd.h>
31 #include <linux/mtd/nand.h>
32 #include <linux/mtd/doc2000.h>
33 #include <linux/mtd/compatmac.h>
34 #include <linux/mtd/partitions.h>
35 #include <linux/mtd/inftl.h>
37 /* Where to look for the devices? */
38 #ifndef CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS
39 #define CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS 0
42 static unsigned long __initdata doc_locations
[] = {
43 #if defined (__alpha__) || defined(__i386__) || defined(__x86_64__)
44 #ifdef CONFIG_MTD_NAND_DISKONCHIP_PROBE_HIGH
45 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000,
46 0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000,
47 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000,
48 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000,
49 0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000,
50 #else /* CONFIG_MTD_DOCPROBE_HIGH */
51 0xc8000, 0xca000, 0xcc000, 0xce000,
52 0xd0000, 0xd2000, 0xd4000, 0xd6000,
53 0xd8000, 0xda000, 0xdc000, 0xde000,
54 0xe0000, 0xe2000, 0xe4000, 0xe6000,
55 0xe8000, 0xea000, 0xec000, 0xee000,
56 #endif /* CONFIG_MTD_DOCPROBE_HIGH */
58 #warning Unknown architecture for DiskOnChip. No default probe locations defined
62 static struct mtd_info
*doclist
= NULL
;
65 void __iomem
*virtadr
;
66 unsigned long physadr
;
69 int chips_per_floor
; /* The number of chips detected on each floor */
74 struct mtd_info
*nextdoc
;
77 /* This is the syndrome computed by the HW ecc generator upon reading an empty
78 page, one with all 0xff for data and stored ecc code. */
79 static u_char empty_read_syndrome
[6] = { 0x26, 0xff, 0x6d, 0x47, 0x73, 0x7a };
81 /* This is the ecc value computed by the HW ecc generator upon writing an empty
82 page, one with all 0xff for data. */
83 static u_char empty_write_ecc
[6] = { 0x4b, 0x00, 0xe2, 0x0e, 0x93, 0xf7 };
85 #define INFTL_BBT_RESERVED_BLOCKS 4
87 #define DoC_is_MillenniumPlus(doc) ((doc)->ChipID == DOC_ChipID_DocMilPlus16 || (doc)->ChipID == DOC_ChipID_DocMilPlus32)
88 #define DoC_is_Millennium(doc) ((doc)->ChipID == DOC_ChipID_DocMil)
89 #define DoC_is_2000(doc) ((doc)->ChipID == DOC_ChipID_Doc2k)
91 static void doc200x_hwcontrol(struct mtd_info
*mtd
, int cmd
,
92 unsigned int bitmask
);
93 static void doc200x_select_chip(struct mtd_info
*mtd
, int chip
);
96 module_param(debug
, int, 0);
98 static int try_dword
= 1;
99 module_param(try_dword
, int, 0);
101 static int no_ecc_failures
= 0;
102 module_param(no_ecc_failures
, int, 0);
104 static int no_autopart
= 0;
105 module_param(no_autopart
, int, 0);
107 static int show_firmware_partition
= 0;
108 module_param(show_firmware_partition
, int, 0);
110 #ifdef CONFIG_MTD_NAND_DISKONCHIP_BBTWRITE
111 static int inftl_bbt_write
= 1;
113 static int inftl_bbt_write
= 0;
115 module_param(inftl_bbt_write
, int, 0);
117 static unsigned long doc_config_location
= CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS
;
118 module_param(doc_config_location
, ulong
, 0);
119 MODULE_PARM_DESC(doc_config_location
, "Physical memory address at which to probe for DiskOnChip");
121 /* Sector size for HW ECC */
122 #define SECTOR_SIZE 512
123 /* The sector bytes are packed into NB_DATA 10 bit words */
124 #define NB_DATA (((SECTOR_SIZE + 1) * 8 + 6) / 10)
125 /* Number of roots */
127 /* First consective root */
129 /* Number of symbols */
132 /* the Reed Solomon control structure */
133 static struct rs_control
*rs_decoder
;
136 * The HW decoder in the DoC ASIC's provides us a error syndrome,
137 * which we must convert to a standard syndrome usable by the generic
138 * Reed-Solomon library code.
140 * Fabrice Bellard figured this out in the old docecc code. I added
141 * some comments, improved a minor bit and converted it to make use
142 * of the generic Reed-Solomon libary. tglx
144 static int doc_ecc_decode(struct rs_control
*rs
, uint8_t *data
, uint8_t *ecc
)
146 int i
, j
, nerr
, errpos
[8];
148 uint16_t ds
[4], s
[5], tmp
, errval
[8], syn
[4];
150 /* Convert the ecc bytes into words */
151 ds
[0] = ((ecc
[4] & 0xff) >> 0) | ((ecc
[5] & 0x03) << 8);
152 ds
[1] = ((ecc
[5] & 0xfc) >> 2) | ((ecc
[2] & 0x0f) << 6);
153 ds
[2] = ((ecc
[2] & 0xf0) >> 4) | ((ecc
[3] & 0x3f) << 4);
154 ds
[3] = ((ecc
[3] & 0xc0) >> 6) | ((ecc
[0] & 0xff) << 2);
157 /* Initialize the syndrome buffer */
158 for (i
= 0; i
< NROOTS
; i
++)
162 * s[i] = ds[3]x^3 + ds[2]x^2 + ds[1]x^1 + ds[0]
163 * where x = alpha^(FCR + i)
165 for (j
= 1; j
< NROOTS
; j
++) {
168 tmp
= rs
->index_of
[ds
[j
]];
169 for (i
= 0; i
< NROOTS
; i
++)
170 s
[i
] ^= rs
->alpha_to
[rs_modnn(rs
, tmp
+ (FCR
+ i
) * j
)];
173 /* Calc s[i] = s[i] / alpha^(v + i) */
174 for (i
= 0; i
< NROOTS
; i
++) {
176 syn
[i
] = rs_modnn(rs
, rs
->index_of
[s
[i
]] + (NN
- FCR
- i
));
178 /* Call the decoder library */
179 nerr
= decode_rs16(rs
, NULL
, NULL
, 1019, syn
, 0, errpos
, 0, errval
);
181 /* Incorrectable errors ? */
186 * Correct the errors. The bitpositions are a bit of magic,
187 * but they are given by the design of the de/encoder circuit
190 for (i
= 0; i
< nerr
; i
++) {
191 int index
, bitpos
, pos
= 1015 - errpos
[i
];
193 if (pos
>= NB_DATA
&& pos
< 1019)
196 /* extract bit position (MSB first) */
197 pos
= 10 * (NB_DATA
- 1 - pos
) - 6;
198 /* now correct the following 10 bits. At most two bytes
199 can be modified since pos is even */
200 index
= (pos
>> 3) ^ 1;
202 if ((index
>= 0 && index
< SECTOR_SIZE
) || index
== (SECTOR_SIZE
+ 1)) {
203 val
= (uint8_t) (errval
[i
] >> (2 + bitpos
));
205 if (index
< SECTOR_SIZE
)
208 index
= ((pos
>> 3) + 1) ^ 1;
209 bitpos
= (bitpos
+ 10) & 7;
212 if ((index
>= 0 && index
< SECTOR_SIZE
) || index
== (SECTOR_SIZE
+ 1)) {
213 val
= (uint8_t) (errval
[i
] << (8 - bitpos
));
215 if (index
< SECTOR_SIZE
)
220 /* If the parity is wrong, no rescue possible */
221 return parity
? -EBADMSG
: nerr
;
224 static void DoC_Delay(struct doc_priv
*doc
, unsigned short cycles
)
229 for (i
= 0; i
< cycles
; i
++) {
230 if (DoC_is_Millennium(doc
))
231 dummy
= ReadDOC(doc
->virtadr
, NOP
);
232 else if (DoC_is_MillenniumPlus(doc
))
233 dummy
= ReadDOC(doc
->virtadr
, Mplus_NOP
);
235 dummy
= ReadDOC(doc
->virtadr
, DOCStatus
);
240 #define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1)
242 /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */
243 static int _DoC_WaitReady(struct doc_priv
*doc
)
245 void __iomem
*docptr
= doc
->virtadr
;
246 unsigned long timeo
= jiffies
+ (HZ
* 10);
249 printk("_DoC_WaitReady...\n");
250 /* Out-of-line routine to wait for chip response */
251 if (DoC_is_MillenniumPlus(doc
)) {
252 while ((ReadDOC(docptr
, Mplus_FlashControl
) & CDSN_CTRL_FR_B_MASK
) != CDSN_CTRL_FR_B_MASK
) {
253 if (time_after(jiffies
, timeo
)) {
254 printk("_DoC_WaitReady timed out.\n");
261 while (!(ReadDOC(docptr
, CDSNControl
) & CDSN_CTRL_FR_B
)) {
262 if (time_after(jiffies
, timeo
)) {
263 printk("_DoC_WaitReady timed out.\n");
274 static inline int DoC_WaitReady(struct doc_priv
*doc
)
276 void __iomem
*docptr
= doc
->virtadr
;
279 if (DoC_is_MillenniumPlus(doc
)) {
282 if ((ReadDOC(docptr
, Mplus_FlashControl
) & CDSN_CTRL_FR_B_MASK
) != CDSN_CTRL_FR_B_MASK
)
283 /* Call the out-of-line routine to wait */
284 ret
= _DoC_WaitReady(doc
);
288 if (!(ReadDOC(docptr
, CDSNControl
) & CDSN_CTRL_FR_B
))
289 /* Call the out-of-line routine to wait */
290 ret
= _DoC_WaitReady(doc
);
295 printk("DoC_WaitReady OK\n");
299 static void doc2000_write_byte(struct mtd_info
*mtd
, u_char datum
)
301 struct nand_chip
*this = mtd
->priv
;
302 struct doc_priv
*doc
= this->priv
;
303 void __iomem
*docptr
= doc
->virtadr
;
306 printk("write_byte %02x\n", datum
);
307 WriteDOC(datum
, docptr
, CDSNSlowIO
);
308 WriteDOC(datum
, docptr
, 2k_CDSN_IO
);
311 static u_char
doc2000_read_byte(struct mtd_info
*mtd
)
313 struct nand_chip
*this = mtd
->priv
;
314 struct doc_priv
*doc
= this->priv
;
315 void __iomem
*docptr
= doc
->virtadr
;
318 ReadDOC(docptr
, CDSNSlowIO
);
320 ret
= ReadDOC(docptr
, 2k_CDSN_IO
);
322 printk("read_byte returns %02x\n", ret
);
326 static void doc2000_writebuf(struct mtd_info
*mtd
, const u_char
*buf
, int len
)
328 struct nand_chip
*this = mtd
->priv
;
329 struct doc_priv
*doc
= this->priv
;
330 void __iomem
*docptr
= doc
->virtadr
;
333 printk("writebuf of %d bytes: ", len
);
334 for (i
= 0; i
< len
; i
++) {
335 WriteDOC_(buf
[i
], docptr
, DoC_2k_CDSN_IO
+ i
);
337 printk("%02x ", buf
[i
]);
343 static void doc2000_readbuf(struct mtd_info
*mtd
, u_char
*buf
, int len
)
345 struct nand_chip
*this = mtd
->priv
;
346 struct doc_priv
*doc
= this->priv
;
347 void __iomem
*docptr
= doc
->virtadr
;
351 printk("readbuf of %d bytes: ", len
);
353 for (i
= 0; i
< len
; i
++) {
354 buf
[i
] = ReadDOC(docptr
, 2k_CDSN_IO
+ i
);
358 static void doc2000_readbuf_dword(struct mtd_info
*mtd
,
359 u_char
*buf
, int len
)
361 struct nand_chip
*this = mtd
->priv
;
362 struct doc_priv
*doc
= this->priv
;
363 void __iomem
*docptr
= doc
->virtadr
;
367 printk("readbuf_dword of %d bytes: ", len
);
369 if (unlikely((((unsigned long)buf
) | len
) & 3)) {
370 for (i
= 0; i
< len
; i
++) {
371 *(uint8_t *) (&buf
[i
]) = ReadDOC(docptr
, 2k_CDSN_IO
+ i
);
374 for (i
= 0; i
< len
; i
+= 4) {
375 *(uint32_t*) (&buf
[i
]) = readl(docptr
+ DoC_2k_CDSN_IO
+ i
);
380 static int doc2000_verifybuf(struct mtd_info
*mtd
, const u_char
*buf
, int len
)
382 struct nand_chip
*this = mtd
->priv
;
383 struct doc_priv
*doc
= this->priv
;
384 void __iomem
*docptr
= doc
->virtadr
;
387 for (i
= 0; i
< len
; i
++)
388 if (buf
[i
] != ReadDOC(docptr
, 2k_CDSN_IO
))
393 static uint16_t __init
doc200x_ident_chip(struct mtd_info
*mtd
, int nr
)
395 struct nand_chip
*this = mtd
->priv
;
396 struct doc_priv
*doc
= this->priv
;
399 doc200x_select_chip(mtd
, nr
);
400 doc200x_hwcontrol(mtd
, NAND_CMD_READID
,
401 NAND_CTRL_CLE
| NAND_CTRL_CHANGE
);
402 doc200x_hwcontrol(mtd
, 0, NAND_CTRL_ALE
| NAND_CTRL_CHANGE
);
403 doc200x_hwcontrol(mtd
, NAND_CMD_NONE
, NAND_NCE
| NAND_CTRL_CHANGE
);
405 /* We cant' use dev_ready here, but at least we wait for the
406 * command to complete
410 ret
= this->read_byte(mtd
) << 8;
411 ret
|= this->read_byte(mtd
);
413 if (doc
->ChipID
== DOC_ChipID_Doc2k
&& try_dword
&& !nr
) {
414 /* First chip probe. See if we get same results by 32-bit access */
419 void __iomem
*docptr
= doc
->virtadr
;
421 doc200x_hwcontrol(mtd
, NAND_CMD_READID
,
422 NAND_CTRL_CLE
| NAND_CTRL_CHANGE
);
423 doc200x_hwcontrol(mtd
, 0, NAND_CTRL_ALE
| NAND_CTRL_CHANGE
);
424 doc200x_hwcontrol(mtd
, NAND_CMD_NONE
,
425 NAND_NCE
| NAND_CTRL_CHANGE
);
429 ident
.dword
= readl(docptr
+ DoC_2k_CDSN_IO
);
430 if (((ident
.byte
[0] << 8) | ident
.byte
[1]) == ret
) {
431 printk(KERN_INFO
"DiskOnChip 2000 responds to DWORD access\n");
432 this->read_buf
= &doc2000_readbuf_dword
;
439 static void __init
doc2000_count_chips(struct mtd_info
*mtd
)
441 struct nand_chip
*this = mtd
->priv
;
442 struct doc_priv
*doc
= this->priv
;
446 /* Max 4 chips per floor on DiskOnChip 2000 */
447 doc
->chips_per_floor
= 4;
449 /* Find out what the first chip is */
450 mfrid
= doc200x_ident_chip(mtd
, 0);
452 /* Find how many chips in each floor. */
453 for (i
= 1; i
< 4; i
++) {
454 if (doc200x_ident_chip(mtd
, i
) != mfrid
)
457 doc
->chips_per_floor
= i
;
458 printk(KERN_DEBUG
"Detected %d chips per floor.\n", i
);
461 static int doc200x_wait(struct mtd_info
*mtd
, struct nand_chip
*this)
463 struct doc_priv
*doc
= this->priv
;
468 this->cmdfunc(mtd
, NAND_CMD_STATUS
, -1, -1);
470 status
= (int)this->read_byte(mtd
);
475 static void doc2001_write_byte(struct mtd_info
*mtd
, u_char datum
)
477 struct nand_chip
*this = mtd
->priv
;
478 struct doc_priv
*doc
= this->priv
;
479 void __iomem
*docptr
= doc
->virtadr
;
481 WriteDOC(datum
, docptr
, CDSNSlowIO
);
482 WriteDOC(datum
, docptr
, Mil_CDSN_IO
);
483 WriteDOC(datum
, docptr
, WritePipeTerm
);
486 static u_char
doc2001_read_byte(struct mtd_info
*mtd
)
488 struct nand_chip
*this = mtd
->priv
;
489 struct doc_priv
*doc
= this->priv
;
490 void __iomem
*docptr
= doc
->virtadr
;
492 /*ReadDOC(docptr, CDSNSlowIO); */
493 /* 11.4.5 -- delay twice to allow extended length cycle */
495 ReadDOC(docptr
, ReadPipeInit
);
496 /*return ReadDOC(docptr, Mil_CDSN_IO); */
497 return ReadDOC(docptr
, LastDataRead
);
500 static void doc2001_writebuf(struct mtd_info
*mtd
, const u_char
*buf
, int len
)
502 struct nand_chip
*this = mtd
->priv
;
503 struct doc_priv
*doc
= this->priv
;
504 void __iomem
*docptr
= doc
->virtadr
;
507 for (i
= 0; i
< len
; i
++)
508 WriteDOC_(buf
[i
], docptr
, DoC_Mil_CDSN_IO
+ i
);
509 /* Terminate write pipeline */
510 WriteDOC(0x00, docptr
, WritePipeTerm
);
513 static void doc2001_readbuf(struct mtd_info
*mtd
, u_char
*buf
, int len
)
515 struct nand_chip
*this = mtd
->priv
;
516 struct doc_priv
*doc
= this->priv
;
517 void __iomem
*docptr
= doc
->virtadr
;
520 /* Start read pipeline */
521 ReadDOC(docptr
, ReadPipeInit
);
523 for (i
= 0; i
< len
- 1; i
++)
524 buf
[i
] = ReadDOC(docptr
, Mil_CDSN_IO
+ (i
& 0xff));
526 /* Terminate read pipeline */
527 buf
[i
] = ReadDOC(docptr
, LastDataRead
);
530 static int doc2001_verifybuf(struct mtd_info
*mtd
, const u_char
*buf
, int len
)
532 struct nand_chip
*this = mtd
->priv
;
533 struct doc_priv
*doc
= this->priv
;
534 void __iomem
*docptr
= doc
->virtadr
;
537 /* Start read pipeline */
538 ReadDOC(docptr
, ReadPipeInit
);
540 for (i
= 0; i
< len
- 1; i
++)
541 if (buf
[i
] != ReadDOC(docptr
, Mil_CDSN_IO
)) {
542 ReadDOC(docptr
, LastDataRead
);
545 if (buf
[i
] != ReadDOC(docptr
, LastDataRead
))
550 static u_char
doc2001plus_read_byte(struct mtd_info
*mtd
)
552 struct nand_chip
*this = mtd
->priv
;
553 struct doc_priv
*doc
= this->priv
;
554 void __iomem
*docptr
= doc
->virtadr
;
557 ReadDOC(docptr
, Mplus_ReadPipeInit
);
558 ReadDOC(docptr
, Mplus_ReadPipeInit
);
559 ret
= ReadDOC(docptr
, Mplus_LastDataRead
);
561 printk("read_byte returns %02x\n", ret
);
565 static void doc2001plus_writebuf(struct mtd_info
*mtd
, const u_char
*buf
, int len
)
567 struct nand_chip
*this = mtd
->priv
;
568 struct doc_priv
*doc
= this->priv
;
569 void __iomem
*docptr
= doc
->virtadr
;
573 printk("writebuf of %d bytes: ", len
);
574 for (i
= 0; i
< len
; i
++) {
575 WriteDOC_(buf
[i
], docptr
, DoC_Mil_CDSN_IO
+ i
);
577 printk("%02x ", buf
[i
]);
583 static void doc2001plus_readbuf(struct mtd_info
*mtd
, u_char
*buf
, int len
)
585 struct nand_chip
*this = mtd
->priv
;
586 struct doc_priv
*doc
= this->priv
;
587 void __iomem
*docptr
= doc
->virtadr
;
591 printk("readbuf of %d bytes: ", len
);
593 /* Start read pipeline */
594 ReadDOC(docptr
, Mplus_ReadPipeInit
);
595 ReadDOC(docptr
, Mplus_ReadPipeInit
);
597 for (i
= 0; i
< len
- 2; i
++) {
598 buf
[i
] = ReadDOC(docptr
, Mil_CDSN_IO
);
600 printk("%02x ", buf
[i
]);
603 /* Terminate read pipeline */
604 buf
[len
- 2] = ReadDOC(docptr
, Mplus_LastDataRead
);
606 printk("%02x ", buf
[len
- 2]);
607 buf
[len
- 1] = ReadDOC(docptr
, Mplus_LastDataRead
);
609 printk("%02x ", buf
[len
- 1]);
614 static int doc2001plus_verifybuf(struct mtd_info
*mtd
, const u_char
*buf
, int len
)
616 struct nand_chip
*this = mtd
->priv
;
617 struct doc_priv
*doc
= this->priv
;
618 void __iomem
*docptr
= doc
->virtadr
;
622 printk("verifybuf of %d bytes: ", len
);
624 /* Start read pipeline */
625 ReadDOC(docptr
, Mplus_ReadPipeInit
);
626 ReadDOC(docptr
, Mplus_ReadPipeInit
);
628 for (i
= 0; i
< len
- 2; i
++)
629 if (buf
[i
] != ReadDOC(docptr
, Mil_CDSN_IO
)) {
630 ReadDOC(docptr
, Mplus_LastDataRead
);
631 ReadDOC(docptr
, Mplus_LastDataRead
);
634 if (buf
[len
- 2] != ReadDOC(docptr
, Mplus_LastDataRead
))
636 if (buf
[len
- 1] != ReadDOC(docptr
, Mplus_LastDataRead
))
641 static void doc2001plus_select_chip(struct mtd_info
*mtd
, int chip
)
643 struct nand_chip
*this = mtd
->priv
;
644 struct doc_priv
*doc
= this->priv
;
645 void __iomem
*docptr
= doc
->virtadr
;
649 printk("select chip (%d)\n", chip
);
652 /* Disable flash internally */
653 WriteDOC(0, docptr
, Mplus_FlashSelect
);
657 floor
= chip
/ doc
->chips_per_floor
;
658 chip
-= (floor
* doc
->chips_per_floor
);
660 /* Assert ChipEnable and deassert WriteProtect */
661 WriteDOC((DOC_FLASH_CE
), docptr
, Mplus_FlashSelect
);
662 this->cmdfunc(mtd
, NAND_CMD_RESET
, -1, -1);
665 doc
->curfloor
= floor
;
668 static void doc200x_select_chip(struct mtd_info
*mtd
, int chip
)
670 struct nand_chip
*this = mtd
->priv
;
671 struct doc_priv
*doc
= this->priv
;
672 void __iomem
*docptr
= doc
->virtadr
;
676 printk("select chip (%d)\n", chip
);
681 floor
= chip
/ doc
->chips_per_floor
;
682 chip
-= (floor
* doc
->chips_per_floor
);
684 /* 11.4.4 -- deassert CE before changing chip */
685 doc200x_hwcontrol(mtd
, NAND_CMD_NONE
, 0 | NAND_CTRL_CHANGE
);
687 WriteDOC(floor
, docptr
, FloorSelect
);
688 WriteDOC(chip
, docptr
, CDSNDeviceSelect
);
690 doc200x_hwcontrol(mtd
, NAND_CMD_NONE
, NAND_NCE
| NAND_CTRL_CHANGE
);
693 doc
->curfloor
= floor
;
696 #define CDSN_CTRL_MSK (CDSN_CTRL_CE | CDSN_CTRL_CLE | CDSN_CTRL_ALE)
698 static void doc200x_hwcontrol(struct mtd_info
*mtd
, int cmd
,
701 struct nand_chip
*this = mtd
->priv
;
702 struct doc_priv
*doc
= this->priv
;
703 void __iomem
*docptr
= doc
->virtadr
;
705 if (ctrl
& NAND_CTRL_CHANGE
) {
706 doc
->CDSNControl
&= ~CDSN_CTRL_MSK
;
707 doc
->CDSNControl
|= ctrl
& CDSN_CTRL_MSK
;
709 printk("hwcontrol(%d): %02x\n", cmd
, doc
->CDSNControl
);
710 WriteDOC(doc
->CDSNControl
, docptr
, CDSNControl
);
711 /* 11.4.3 -- 4 NOPs after CSDNControl write */
714 if (cmd
!= NAND_CMD_NONE
) {
715 if (DoC_is_2000(doc
))
716 doc2000_write_byte(mtd
, cmd
);
718 doc2001_write_byte(mtd
, cmd
);
722 static void doc2001plus_command(struct mtd_info
*mtd
, unsigned command
, int column
, int page_addr
)
724 struct nand_chip
*this = mtd
->priv
;
725 struct doc_priv
*doc
= this->priv
;
726 void __iomem
*docptr
= doc
->virtadr
;
729 * Must terminate write pipeline before sending any commands
732 if (command
== NAND_CMD_PAGEPROG
) {
733 WriteDOC(0x00, docptr
, Mplus_WritePipeTerm
);
734 WriteDOC(0x00, docptr
, Mplus_WritePipeTerm
);
738 * Write out the command to the device.
740 if (command
== NAND_CMD_SEQIN
) {
743 if (column
>= mtd
->writesize
) {
745 column
-= mtd
->writesize
;
746 readcmd
= NAND_CMD_READOOB
;
747 } else if (column
< 256) {
748 /* First 256 bytes --> READ0 */
749 readcmd
= NAND_CMD_READ0
;
752 readcmd
= NAND_CMD_READ1
;
754 WriteDOC(readcmd
, docptr
, Mplus_FlashCmd
);
756 WriteDOC(command
, docptr
, Mplus_FlashCmd
);
757 WriteDOC(0, docptr
, Mplus_WritePipeTerm
);
758 WriteDOC(0, docptr
, Mplus_WritePipeTerm
);
760 if (column
!= -1 || page_addr
!= -1) {
761 /* Serially input address */
763 /* Adjust columns for 16 bit buswidth */
764 if (this->options
& NAND_BUSWIDTH_16
)
766 WriteDOC(column
, docptr
, Mplus_FlashAddress
);
768 if (page_addr
!= -1) {
769 WriteDOC((unsigned char)(page_addr
& 0xff), docptr
, Mplus_FlashAddress
);
770 WriteDOC((unsigned char)((page_addr
>> 8) & 0xff), docptr
, Mplus_FlashAddress
);
771 /* One more address cycle for higher density devices */
772 if (this->chipsize
& 0x0c000000) {
773 WriteDOC((unsigned char)((page_addr
>> 16) & 0x0f), docptr
, Mplus_FlashAddress
);
774 printk("high density\n");
777 WriteDOC(0, docptr
, Mplus_WritePipeTerm
);
778 WriteDOC(0, docptr
, Mplus_WritePipeTerm
);
780 if (command
== NAND_CMD_READ0
|| command
== NAND_CMD_READ1
||
781 command
== NAND_CMD_READOOB
|| command
== NAND_CMD_READID
)
782 WriteDOC(0, docptr
, Mplus_FlashControl
);
786 * program and erase have their own busy handlers
787 * status and sequential in needs no delay
791 case NAND_CMD_PAGEPROG
:
792 case NAND_CMD_ERASE1
:
793 case NAND_CMD_ERASE2
:
795 case NAND_CMD_STATUS
:
801 udelay(this->chip_delay
);
802 WriteDOC(NAND_CMD_STATUS
, docptr
, Mplus_FlashCmd
);
803 WriteDOC(0, docptr
, Mplus_WritePipeTerm
);
804 WriteDOC(0, docptr
, Mplus_WritePipeTerm
);
805 while (!(this->read_byte(mtd
) & 0x40)) ;
808 /* This applies to read commands */
811 * If we don't have access to the busy pin, we apply the given
814 if (!this->dev_ready
) {
815 udelay(this->chip_delay
);
820 /* Apply this short delay always to ensure that we do wait tWB in
821 * any case on any machine. */
823 /* wait until command is processed */
824 while (!this->dev_ready(mtd
)) ;
827 static int doc200x_dev_ready(struct mtd_info
*mtd
)
829 struct nand_chip
*this = mtd
->priv
;
830 struct doc_priv
*doc
= this->priv
;
831 void __iomem
*docptr
= doc
->virtadr
;
833 if (DoC_is_MillenniumPlus(doc
)) {
834 /* 11.4.2 -- must NOP four times before checking FR/B# */
836 if ((ReadDOC(docptr
, Mplus_FlashControl
) & CDSN_CTRL_FR_B_MASK
) != CDSN_CTRL_FR_B_MASK
) {
838 printk("not ready\n");
842 printk("was ready\n");
845 /* 11.4.2 -- must NOP four times before checking FR/B# */
847 if (!(ReadDOC(docptr
, CDSNControl
) & CDSN_CTRL_FR_B
)) {
849 printk("not ready\n");
852 /* 11.4.2 -- Must NOP twice if it's ready */
855 printk("was ready\n");
860 static int doc200x_block_bad(struct mtd_info
*mtd
, loff_t ofs
, int getchip
)
862 /* This is our last resort if we couldn't find or create a BBT. Just
863 pretend all blocks are good. */
867 static void doc200x_enable_hwecc(struct mtd_info
*mtd
, int mode
)
869 struct nand_chip
*this = mtd
->priv
;
870 struct doc_priv
*doc
= this->priv
;
871 void __iomem
*docptr
= doc
->virtadr
;
873 /* Prime the ECC engine */
876 WriteDOC(DOC_ECC_RESET
, docptr
, ECCConf
);
877 WriteDOC(DOC_ECC_EN
, docptr
, ECCConf
);
880 WriteDOC(DOC_ECC_RESET
, docptr
, ECCConf
);
881 WriteDOC(DOC_ECC_EN
| DOC_ECC_RW
, docptr
, ECCConf
);
886 static void doc2001plus_enable_hwecc(struct mtd_info
*mtd
, int mode
)
888 struct nand_chip
*this = mtd
->priv
;
889 struct doc_priv
*doc
= this->priv
;
890 void __iomem
*docptr
= doc
->virtadr
;
892 /* Prime the ECC engine */
895 WriteDOC(DOC_ECC_RESET
, docptr
, Mplus_ECCConf
);
896 WriteDOC(DOC_ECC_EN
, docptr
, Mplus_ECCConf
);
899 WriteDOC(DOC_ECC_RESET
, docptr
, Mplus_ECCConf
);
900 WriteDOC(DOC_ECC_EN
| DOC_ECC_RW
, docptr
, Mplus_ECCConf
);
905 /* This code is only called on write */
906 static int doc200x_calculate_ecc(struct mtd_info
*mtd
, const u_char
*dat
, unsigned char *ecc_code
)
908 struct nand_chip
*this = mtd
->priv
;
909 struct doc_priv
*doc
= this->priv
;
910 void __iomem
*docptr
= doc
->virtadr
;
914 /* flush the pipeline */
915 if (DoC_is_2000(doc
)) {
916 WriteDOC(doc
->CDSNControl
& ~CDSN_CTRL_FLASH_IO
, docptr
, CDSNControl
);
917 WriteDOC(0, docptr
, 2k_CDSN_IO
);
918 WriteDOC(0, docptr
, 2k_CDSN_IO
);
919 WriteDOC(0, docptr
, 2k_CDSN_IO
);
920 WriteDOC(doc
->CDSNControl
, docptr
, CDSNControl
);
921 } else if (DoC_is_MillenniumPlus(doc
)) {
922 WriteDOC(0, docptr
, Mplus_NOP
);
923 WriteDOC(0, docptr
, Mplus_NOP
);
924 WriteDOC(0, docptr
, Mplus_NOP
);
926 WriteDOC(0, docptr
, NOP
);
927 WriteDOC(0, docptr
, NOP
);
928 WriteDOC(0, docptr
, NOP
);
931 for (i
= 0; i
< 6; i
++) {
932 if (DoC_is_MillenniumPlus(doc
))
933 ecc_code
[i
] = ReadDOC_(docptr
, DoC_Mplus_ECCSyndrome0
+ i
);
935 ecc_code
[i
] = ReadDOC_(docptr
, DoC_ECCSyndrome0
+ i
);
936 if (ecc_code
[i
] != empty_write_ecc
[i
])
939 if (DoC_is_MillenniumPlus(doc
))
940 WriteDOC(DOC_ECC_DIS
, docptr
, Mplus_ECCConf
);
942 WriteDOC(DOC_ECC_DIS
, docptr
, ECCConf
);
944 /* If emptymatch=1, we might have an all-0xff data buffer. Check. */
946 /* Note: this somewhat expensive test should not be triggered
947 often. It could be optimized away by examining the data in
948 the writebuf routine, and remembering the result. */
949 for (i
= 0; i
< 512; i
++) {
956 /* If emptymatch still =1, we do have an all-0xff data buffer.
957 Return all-0xff ecc value instead of the computed one, so
958 it'll look just like a freshly-erased page. */
960 memset(ecc_code
, 0xff, 6);
965 static int doc200x_correct_data(struct mtd_info
*mtd
, u_char
*dat
,
966 u_char
*read_ecc
, u_char
*isnull
)
969 struct nand_chip
*this = mtd
->priv
;
970 struct doc_priv
*doc
= this->priv
;
971 void __iomem
*docptr
= doc
->virtadr
;
973 volatile u_char dummy
;
976 /* flush the pipeline */
977 if (DoC_is_2000(doc
)) {
978 dummy
= ReadDOC(docptr
, 2k_ECCStatus
);
979 dummy
= ReadDOC(docptr
, 2k_ECCStatus
);
980 dummy
= ReadDOC(docptr
, 2k_ECCStatus
);
981 } else if (DoC_is_MillenniumPlus(doc
)) {
982 dummy
= ReadDOC(docptr
, Mplus_ECCConf
);
983 dummy
= ReadDOC(docptr
, Mplus_ECCConf
);
984 dummy
= ReadDOC(docptr
, Mplus_ECCConf
);
986 dummy
= ReadDOC(docptr
, ECCConf
);
987 dummy
= ReadDOC(docptr
, ECCConf
);
988 dummy
= ReadDOC(docptr
, ECCConf
);
991 /* Error occured ? */
993 for (i
= 0; i
< 6; i
++) {
994 if (DoC_is_MillenniumPlus(doc
))
995 calc_ecc
[i
] = ReadDOC_(docptr
, DoC_Mplus_ECCSyndrome0
+ i
);
997 calc_ecc
[i
] = ReadDOC_(docptr
, DoC_ECCSyndrome0
+ i
);
998 if (calc_ecc
[i
] != empty_read_syndrome
[i
])
1001 /* If emptymatch=1, the read syndrome is consistent with an
1002 all-0xff data and stored ecc block. Check the stored ecc. */
1004 for (i
= 0; i
< 6; i
++) {
1005 if (read_ecc
[i
] == 0xff)
1011 /* If emptymatch still =1, check the data block. */
1013 /* Note: this somewhat expensive test should not be triggered
1014 often. It could be optimized away by examining the data in
1015 the readbuf routine, and remembering the result. */
1016 for (i
= 0; i
< 512; i
++) {
1023 /* If emptymatch still =1, this is almost certainly a freshly-
1024 erased block, in which case the ECC will not come out right.
1025 We'll suppress the error and tell the caller everything's
1026 OK. Because it is. */
1028 ret
= doc_ecc_decode(rs_decoder
, dat
, calc_ecc
);
1030 printk(KERN_ERR
"doc200x_correct_data corrected %d errors\n", ret
);
1032 if (DoC_is_MillenniumPlus(doc
))
1033 WriteDOC(DOC_ECC_DIS
, docptr
, Mplus_ECCConf
);
1035 WriteDOC(DOC_ECC_DIS
, docptr
, ECCConf
);
1036 if (no_ecc_failures
&& mtd_is_eccerr(ret
)) {
1037 printk(KERN_ERR
"suppressing ECC failure\n");
1043 /*u_char mydatabuf[528]; */
1045 /* The strange out-of-order .oobfree list below is a (possibly unneeded)
1046 * attempt to retain compatibility. It used to read:
1047 * .oobfree = { {8, 8} }
1048 * Since that leaves two bytes unusable, it was changed. But the following
1049 * scheme might affect existing jffs2 installs by moving the cleanmarker:
1050 * .oobfree = { {6, 10} }
1051 * jffs2 seems to handle the above gracefully, but the current scheme seems
1052 * safer. The only problem with it is that any code that parses oobfree must
1053 * be able to handle out-of-order segments.
1055 static struct nand_ecclayout doc200x_oobinfo
= {
1057 .eccpos
= {0, 1, 2, 3, 4, 5},
1058 .oobfree
= {{8, 8}, {6, 2}}
1061 /* Find the (I)NFTL Media Header, and optionally also the mirror media header.
1062 On sucessful return, buf will contain a copy of the media header for
1063 further processing. id is the string to scan for, and will presumably be
1064 either "ANAND" or "BNAND". If findmirror=1, also look for the mirror media
1065 header. The page #s of the found media headers are placed in mh0_page and
1066 mh1_page in the DOC private structure. */
1067 static int __init
find_media_headers(struct mtd_info
*mtd
, u_char
*buf
, const char *id
, int findmirror
)
1069 struct nand_chip
*this = mtd
->priv
;
1070 struct doc_priv
*doc
= this->priv
;
1075 for (offs
= 0; offs
< mtd
->size
; offs
+= mtd
->erasesize
) {
1076 ret
= mtd_read(mtd
, offs
, mtd
->writesize
, &retlen
, buf
);
1077 if (retlen
!= mtd
->writesize
)
1080 printk(KERN_WARNING
"ECC error scanning DOC at 0x%x\n", offs
);
1082 if (memcmp(buf
, id
, 6))
1084 printk(KERN_INFO
"Found DiskOnChip %s Media Header at 0x%x\n", id
, offs
);
1085 if (doc
->mh0_page
== -1) {
1086 doc
->mh0_page
= offs
>> this->page_shift
;
1091 doc
->mh1_page
= offs
>> this->page_shift
;
1094 if (doc
->mh0_page
== -1) {
1095 printk(KERN_WARNING
"DiskOnChip %s Media Header not found.\n", id
);
1098 /* Only one mediaheader was found. We want buf to contain a
1099 mediaheader on return, so we'll have to re-read the one we found. */
1100 offs
= doc
->mh0_page
<< this->page_shift
;
1101 ret
= mtd_read(mtd
, offs
, mtd
->writesize
, &retlen
, buf
);
1102 if (retlen
!= mtd
->writesize
) {
1103 /* Insanity. Give up. */
1104 printk(KERN_ERR
"Read DiskOnChip Media Header once, but can't reread it???\n");
1110 static inline int __init
nftl_partscan(struct mtd_info
*mtd
, struct mtd_partition
*parts
)
1112 struct nand_chip
*this = mtd
->priv
;
1113 struct doc_priv
*doc
= this->priv
;
1116 struct NFTLMediaHeader
*mh
;
1117 const unsigned psize
= 1 << this->page_shift
;
1119 unsigned blocks
, maxblocks
;
1120 int offs
, numheaders
;
1122 buf
= kmalloc(mtd
->writesize
, GFP_KERNEL
);
1124 printk(KERN_ERR
"DiskOnChip mediaheader kmalloc failed!\n");
1127 if (!(numheaders
= find_media_headers(mtd
, buf
, "ANAND", 1)))
1129 mh
= (struct NFTLMediaHeader
*)buf
;
1131 le16_to_cpus(&mh
->NumEraseUnits
);
1132 le16_to_cpus(&mh
->FirstPhysicalEUN
);
1133 le32_to_cpus(&mh
->FormattedSize
);
1135 printk(KERN_INFO
" DataOrgID = %s\n"
1136 " NumEraseUnits = %d\n"
1137 " FirstPhysicalEUN = %d\n"
1138 " FormattedSize = %d\n"
1139 " UnitSizeFactor = %d\n",
1140 mh
->DataOrgID
, mh
->NumEraseUnits
,
1141 mh
->FirstPhysicalEUN
, mh
->FormattedSize
,
1142 mh
->UnitSizeFactor
);
1144 blocks
= mtd
->size
>> this->phys_erase_shift
;
1145 maxblocks
= min(32768U, mtd
->erasesize
- psize
);
1147 if (mh
->UnitSizeFactor
== 0x00) {
1148 /* Auto-determine UnitSizeFactor. The constraints are:
1149 - There can be at most 32768 virtual blocks.
1150 - There can be at most (virtual block size - page size)
1151 virtual blocks (because MediaHeader+BBT must fit in 1).
1153 mh
->UnitSizeFactor
= 0xff;
1154 while (blocks
> maxblocks
) {
1156 maxblocks
= min(32768U, (maxblocks
<< 1) + psize
);
1157 mh
->UnitSizeFactor
--;
1159 printk(KERN_WARNING
"UnitSizeFactor=0x00 detected. Correct value is assumed to be 0x%02x.\n", mh
->UnitSizeFactor
);
1162 /* NOTE: The lines below modify internal variables of the NAND and MTD
1163 layers; variables with have already been configured by nand_scan.
1164 Unfortunately, we didn't know before this point what these values
1165 should be. Thus, this code is somewhat dependant on the exact
1166 implementation of the NAND layer. */
1167 if (mh
->UnitSizeFactor
!= 0xff) {
1168 this->bbt_erase_shift
+= (0xff - mh
->UnitSizeFactor
);
1169 mtd
->erasesize
<<= (0xff - mh
->UnitSizeFactor
);
1170 printk(KERN_INFO
"Setting virtual erase size to %d\n", mtd
->erasesize
);
1171 blocks
= mtd
->size
>> this->bbt_erase_shift
;
1172 maxblocks
= min(32768U, mtd
->erasesize
- psize
);
1175 if (blocks
> maxblocks
) {
1176 printk(KERN_ERR
"UnitSizeFactor of 0x%02x is inconsistent with device size. Aborting.\n", mh
->UnitSizeFactor
);
1180 /* Skip past the media headers. */
1181 offs
= max(doc
->mh0_page
, doc
->mh1_page
);
1182 offs
<<= this->page_shift
;
1183 offs
+= mtd
->erasesize
;
1185 if (show_firmware_partition
== 1) {
1186 parts
[0].name
= " DiskOnChip Firmware / Media Header partition";
1187 parts
[0].offset
= 0;
1188 parts
[0].size
= offs
;
1192 parts
[numparts
].name
= " DiskOnChip BDTL partition";
1193 parts
[numparts
].offset
= offs
;
1194 parts
[numparts
].size
= (mh
->NumEraseUnits
- numheaders
) << this->bbt_erase_shift
;
1196 offs
+= parts
[numparts
].size
;
1199 if (offs
< mtd
->size
) {
1200 parts
[numparts
].name
= " DiskOnChip Remainder partition";
1201 parts
[numparts
].offset
= offs
;
1202 parts
[numparts
].size
= mtd
->size
- offs
;
1212 /* This is a stripped-down copy of the code in inftlmount.c */
1213 static inline int __init
inftl_partscan(struct mtd_info
*mtd
, struct mtd_partition
*parts
)
1215 struct nand_chip
*this = mtd
->priv
;
1216 struct doc_priv
*doc
= this->priv
;
1219 struct INFTLMediaHeader
*mh
;
1220 struct INFTLPartition
*ip
;
1223 int vshift
, lastvunit
= 0;
1225 int end
= mtd
->size
;
1227 if (inftl_bbt_write
)
1228 end
-= (INFTL_BBT_RESERVED_BLOCKS
<< this->phys_erase_shift
);
1230 buf
= kmalloc(mtd
->writesize
, GFP_KERNEL
);
1232 printk(KERN_ERR
"DiskOnChip mediaheader kmalloc failed!\n");
1236 if (!find_media_headers(mtd
, buf
, "BNAND", 0))
1238 doc
->mh1_page
= doc
->mh0_page
+ (4096 >> this->page_shift
);
1239 mh
= (struct INFTLMediaHeader
*)buf
;
1241 le32_to_cpus(&mh
->NoOfBootImageBlocks
);
1242 le32_to_cpus(&mh
->NoOfBinaryPartitions
);
1243 le32_to_cpus(&mh
->NoOfBDTLPartitions
);
1244 le32_to_cpus(&mh
->BlockMultiplierBits
);
1245 le32_to_cpus(&mh
->FormatFlags
);
1246 le32_to_cpus(&mh
->PercentUsed
);
1248 printk(KERN_INFO
" bootRecordID = %s\n"
1249 " NoOfBootImageBlocks = %d\n"
1250 " NoOfBinaryPartitions = %d\n"
1251 " NoOfBDTLPartitions = %d\n"
1252 " BlockMultiplerBits = %d\n"
1253 " FormatFlgs = %d\n"
1254 " OsakVersion = %d.%d.%d.%d\n"
1255 " PercentUsed = %d\n",
1256 mh
->bootRecordID
, mh
->NoOfBootImageBlocks
,
1257 mh
->NoOfBinaryPartitions
,
1258 mh
->NoOfBDTLPartitions
,
1259 mh
->BlockMultiplierBits
, mh
->FormatFlags
,
1260 ((unsigned char *) &mh
->OsakVersion
)[0] & 0xf,
1261 ((unsigned char *) &mh
->OsakVersion
)[1] & 0xf,
1262 ((unsigned char *) &mh
->OsakVersion
)[2] & 0xf,
1263 ((unsigned char *) &mh
->OsakVersion
)[3] & 0xf,
1266 vshift
= this->phys_erase_shift
+ mh
->BlockMultiplierBits
;
1268 blocks
= mtd
->size
>> vshift
;
1269 if (blocks
> 32768) {
1270 printk(KERN_ERR
"BlockMultiplierBits=%d is inconsistent with device size. Aborting.\n", mh
->BlockMultiplierBits
);
1274 blocks
= doc
->chips_per_floor
<< (this->chip_shift
- this->phys_erase_shift
);
1275 if (inftl_bbt_write
&& (blocks
> mtd
->erasesize
)) {
1276 printk(KERN_ERR
"Writeable BBTs spanning more than one erase block are not yet supported. FIX ME!\n");
1280 /* Scan the partitions */
1281 for (i
= 0; (i
< 4); i
++) {
1282 ip
= &(mh
->Partitions
[i
]);
1283 le32_to_cpus(&ip
->virtualUnits
);
1284 le32_to_cpus(&ip
->firstUnit
);
1285 le32_to_cpus(&ip
->lastUnit
);
1286 le32_to_cpus(&ip
->flags
);
1287 le32_to_cpus(&ip
->spareUnits
);
1288 le32_to_cpus(&ip
->Reserved0
);
1290 printk(KERN_INFO
" PARTITION[%d] ->\n"
1291 " virtualUnits = %d\n"
1295 " spareUnits = %d\n",
1296 i
, ip
->virtualUnits
, ip
->firstUnit
,
1297 ip
->lastUnit
, ip
->flags
,
1300 if ((show_firmware_partition
== 1) &&
1301 (i
== 0) && (ip
->firstUnit
> 0)) {
1302 parts
[0].name
= " DiskOnChip IPL / Media Header partition";
1303 parts
[0].offset
= 0;
1304 parts
[0].size
= mtd
->erasesize
* ip
->firstUnit
;
1308 if (ip
->flags
& INFTL_BINARY
)
1309 parts
[numparts
].name
= " DiskOnChip BDK partition";
1311 parts
[numparts
].name
= " DiskOnChip BDTL partition";
1312 parts
[numparts
].offset
= ip
->firstUnit
<< vshift
;
1313 parts
[numparts
].size
= (1 + ip
->lastUnit
- ip
->firstUnit
) << vshift
;
1315 if (ip
->lastUnit
> lastvunit
)
1316 lastvunit
= ip
->lastUnit
;
1317 if (ip
->flags
& INFTL_LAST
)
1321 if ((lastvunit
<< vshift
) < end
) {
1322 parts
[numparts
].name
= " DiskOnChip Remainder partition";
1323 parts
[numparts
].offset
= lastvunit
<< vshift
;
1324 parts
[numparts
].size
= end
- parts
[numparts
].offset
;
1333 static int __init
nftl_scan_bbt(struct mtd_info
*mtd
)
1336 struct nand_chip
*this = mtd
->priv
;
1337 struct doc_priv
*doc
= this->priv
;
1338 struct mtd_partition parts
[2];
1340 memset((char *)parts
, 0, sizeof(parts
));
1341 /* On NFTL, we have to find the media headers before we can read the
1342 BBTs, since they're stored in the media header eraseblocks. */
1343 numparts
= nftl_partscan(mtd
, parts
);
1346 this->bbt_td
->options
= NAND_BBT_ABSPAGE
| NAND_BBT_8BIT
|
1347 NAND_BBT_SAVECONTENT
| NAND_BBT_WRITE
|
1349 this->bbt_td
->veroffs
= 7;
1350 this->bbt_td
->pages
[0] = doc
->mh0_page
+ 1;
1351 if (doc
->mh1_page
!= -1) {
1352 this->bbt_md
->options
= NAND_BBT_ABSPAGE
| NAND_BBT_8BIT
|
1353 NAND_BBT_SAVECONTENT
| NAND_BBT_WRITE
|
1355 this->bbt_md
->veroffs
= 7;
1356 this->bbt_md
->pages
[0] = doc
->mh1_page
+ 1;
1358 this->bbt_md
= NULL
;
1361 /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set.
1362 At least as nand_bbt.c is currently written. */
1363 if ((ret
= nand_scan_bbt(mtd
, NULL
)))
1365 add_mtd_device(mtd
);
1366 #ifdef CONFIG_MTD_PARTITIONS
1368 add_mtd_partitions(mtd
, parts
, numparts
);
1373 static int __init
inftl_scan_bbt(struct mtd_info
*mtd
)
1376 struct nand_chip
*this = mtd
->priv
;
1377 struct doc_priv
*doc
= this->priv
;
1378 struct mtd_partition parts
[5];
1380 if (this->numchips
> doc
->chips_per_floor
) {
1381 printk(KERN_ERR
"Multi-floor INFTL devices not yet supported.\n");
1385 if (DoC_is_MillenniumPlus(doc
)) {
1386 this->bbt_td
->options
= NAND_BBT_2BIT
| NAND_BBT_ABSPAGE
;
1387 if (inftl_bbt_write
)
1388 this->bbt_td
->options
|= NAND_BBT_WRITE
;
1389 this->bbt_td
->pages
[0] = 2;
1390 this->bbt_md
= NULL
;
1392 this->bbt_td
->options
= NAND_BBT_LASTBLOCK
| NAND_BBT_8BIT
| NAND_BBT_VERSION
;
1393 if (inftl_bbt_write
)
1394 this->bbt_td
->options
|= NAND_BBT_WRITE
;
1395 this->bbt_td
->offs
= 8;
1396 this->bbt_td
->len
= 8;
1397 this->bbt_td
->veroffs
= 7;
1398 this->bbt_td
->maxblocks
= INFTL_BBT_RESERVED_BLOCKS
;
1399 this->bbt_td
->reserved_block_code
= 0x01;
1400 this->bbt_td
->pattern
= "MSYS_BBT";
1402 this->bbt_md
->options
= NAND_BBT_LASTBLOCK
| NAND_BBT_8BIT
| NAND_BBT_VERSION
;
1403 if (inftl_bbt_write
)
1404 this->bbt_md
->options
|= NAND_BBT_WRITE
;
1405 this->bbt_md
->offs
= 8;
1406 this->bbt_md
->len
= 8;
1407 this->bbt_md
->veroffs
= 7;
1408 this->bbt_md
->maxblocks
= INFTL_BBT_RESERVED_BLOCKS
;
1409 this->bbt_md
->reserved_block_code
= 0x01;
1410 this->bbt_md
->pattern
= "TBB_SYSM";
1413 /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set.
1414 At least as nand_bbt.c is currently written. */
1415 if ((ret
= nand_scan_bbt(mtd
, NULL
)))
1417 memset((char *)parts
, 0, sizeof(parts
));
1418 numparts
= inftl_partscan(mtd
, parts
);
1419 /* At least for now, require the INFTL Media Header. We could probably
1420 do without it for non-INFTL use, since all it gives us is
1421 autopartitioning, but I want to give it more thought. */
1424 add_mtd_device(mtd
);
1425 #ifdef CONFIG_MTD_PARTITIONS
1427 add_mtd_partitions(mtd
, parts
, numparts
);
1432 static inline int __init
doc2000_init(struct mtd_info
*mtd
)
1434 struct nand_chip
*this = mtd
->priv
;
1435 struct doc_priv
*doc
= this->priv
;
1437 this->read_byte
= doc2000_read_byte
;
1438 this->write_buf
= doc2000_writebuf
;
1439 this->read_buf
= doc2000_readbuf
;
1440 this->verify_buf
= doc2000_verifybuf
;
1441 this->scan_bbt
= nftl_scan_bbt
;
1443 doc
->CDSNControl
= CDSN_CTRL_FLASH_IO
| CDSN_CTRL_ECC_IO
;
1444 doc2000_count_chips(mtd
);
1445 mtd
->name
= "DiskOnChip 2000 (NFTL Model)";
1446 return (4 * doc
->chips_per_floor
);
1449 static inline int __init
doc2001_init(struct mtd_info
*mtd
)
1451 struct nand_chip
*this = mtd
->priv
;
1452 struct doc_priv
*doc
= this->priv
;
1454 this->read_byte
= doc2001_read_byte
;
1455 this->write_buf
= doc2001_writebuf
;
1456 this->read_buf
= doc2001_readbuf
;
1457 this->verify_buf
= doc2001_verifybuf
;
1459 ReadDOC(doc
->virtadr
, ChipID
);
1460 ReadDOC(doc
->virtadr
, ChipID
);
1461 ReadDOC(doc
->virtadr
, ChipID
);
1462 if (ReadDOC(doc
->virtadr
, ChipID
) != DOC_ChipID_DocMil
) {
1463 /* It's not a Millennium; it's one of the newer
1464 DiskOnChip 2000 units with a similar ASIC.
1465 Treat it like a Millennium, except that it
1466 can have multiple chips. */
1467 doc2000_count_chips(mtd
);
1468 mtd
->name
= "DiskOnChip 2000 (INFTL Model)";
1469 this->scan_bbt
= inftl_scan_bbt
;
1470 return (4 * doc
->chips_per_floor
);
1472 /* Bog-standard Millennium */
1473 doc
->chips_per_floor
= 1;
1474 mtd
->name
= "DiskOnChip Millennium";
1475 this->scan_bbt
= nftl_scan_bbt
;
1480 static inline int __init
doc2001plus_init(struct mtd_info
*mtd
)
1482 struct nand_chip
*this = mtd
->priv
;
1483 struct doc_priv
*doc
= this->priv
;
1485 this->read_byte
= doc2001plus_read_byte
;
1486 this->write_buf
= doc2001plus_writebuf
;
1487 this->read_buf
= doc2001plus_readbuf
;
1488 this->verify_buf
= doc2001plus_verifybuf
;
1489 this->scan_bbt
= inftl_scan_bbt
;
1490 this->cmd_ctrl
= NULL
;
1491 this->select_chip
= doc2001plus_select_chip
;
1492 this->cmdfunc
= doc2001plus_command
;
1493 this->ecc
.hwctl
= doc2001plus_enable_hwecc
;
1495 doc
->chips_per_floor
= 1;
1496 mtd
->name
= "DiskOnChip Millennium Plus";
1501 static int __init
doc_probe(unsigned long physadr
)
1503 unsigned char ChipID
;
1504 struct mtd_info
*mtd
;
1505 struct nand_chip
*nand
;
1506 struct doc_priv
*doc
;
1507 void __iomem
*virtadr
;
1508 unsigned char save_control
;
1509 unsigned char tmp
, tmpb
, tmpc
;
1510 int reg
, len
, numchips
;
1513 virtadr
= ioremap(physadr
, DOC_IOREMAP_LEN
);
1515 printk(KERN_ERR
"Diskonchip ioremap failed: 0x%x bytes at 0x%lx\n", DOC_IOREMAP_LEN
, physadr
);
1519 /* It's not possible to cleanly detect the DiskOnChip - the
1520 * bootup procedure will put the device into reset mode, and
1521 * it's not possible to talk to it without actually writing
1522 * to the DOCControl register. So we store the current contents
1523 * of the DOCControl register's location, in case we later decide
1524 * that it's not a DiskOnChip, and want to put it back how we
1527 save_control
= ReadDOC(virtadr
, DOCControl
);
1529 /* Reset the DiskOnChip ASIC */
1530 WriteDOC(DOC_MODE_CLR_ERR
| DOC_MODE_MDWREN
| DOC_MODE_RESET
, virtadr
, DOCControl
);
1531 WriteDOC(DOC_MODE_CLR_ERR
| DOC_MODE_MDWREN
| DOC_MODE_RESET
, virtadr
, DOCControl
);
1533 /* Enable the DiskOnChip ASIC */
1534 WriteDOC(DOC_MODE_CLR_ERR
| DOC_MODE_MDWREN
| DOC_MODE_NORMAL
, virtadr
, DOCControl
);
1535 WriteDOC(DOC_MODE_CLR_ERR
| DOC_MODE_MDWREN
| DOC_MODE_NORMAL
, virtadr
, DOCControl
);
1537 ChipID
= ReadDOC(virtadr
, ChipID
);
1540 case DOC_ChipID_Doc2k
:
1541 reg
= DoC_2k_ECCStatus
;
1543 case DOC_ChipID_DocMil
:
1546 case DOC_ChipID_DocMilPlus16
:
1547 case DOC_ChipID_DocMilPlus32
:
1549 /* Possible Millennium Plus, need to do more checks */
1550 /* Possibly release from power down mode */
1551 for (tmp
= 0; (tmp
< 4); tmp
++)
1552 ReadDOC(virtadr
, Mplus_Power
);
1554 /* Reset the Millennium Plus ASIC */
1555 tmp
= DOC_MODE_RESET
| DOC_MODE_MDWREN
| DOC_MODE_RST_LAT
| DOC_MODE_BDECT
;
1556 WriteDOC(tmp
, virtadr
, Mplus_DOCControl
);
1557 WriteDOC(~tmp
, virtadr
, Mplus_CtrlConfirm
);
1560 /* Enable the Millennium Plus ASIC */
1561 tmp
= DOC_MODE_NORMAL
| DOC_MODE_MDWREN
| DOC_MODE_RST_LAT
| DOC_MODE_BDECT
;
1562 WriteDOC(tmp
, virtadr
, Mplus_DOCControl
);
1563 WriteDOC(~tmp
, virtadr
, Mplus_CtrlConfirm
);
1566 ChipID
= ReadDOC(virtadr
, ChipID
);
1569 case DOC_ChipID_DocMilPlus16
:
1570 reg
= DoC_Mplus_Toggle
;
1572 case DOC_ChipID_DocMilPlus32
:
1573 printk(KERN_ERR
"DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n");
1584 /* Check the TOGGLE bit in the ECC register */
1585 tmp
= ReadDOC_(virtadr
, reg
) & DOC_TOGGLE_BIT
;
1586 tmpb
= ReadDOC_(virtadr
, reg
) & DOC_TOGGLE_BIT
;
1587 tmpc
= ReadDOC_(virtadr
, reg
) & DOC_TOGGLE_BIT
;
1588 if ((tmp
== tmpb
) || (tmp
!= tmpc
)) {
1589 printk(KERN_WARNING
"Possible DiskOnChip at 0x%lx failed TOGGLE test, dropping.\n", physadr
);
1594 for (mtd
= doclist
; mtd
; mtd
= doc
->nextdoc
) {
1595 unsigned char oldval
;
1596 unsigned char newval
;
1599 /* Use the alias resolution register to determine if this is
1600 in fact the same DOC aliased to a new address. If writes
1601 to one chip's alias resolution register change the value on
1602 the other chip, they're the same chip. */
1603 if (ChipID
== DOC_ChipID_DocMilPlus16
) {
1604 oldval
= ReadDOC(doc
->virtadr
, Mplus_AliasResolution
);
1605 newval
= ReadDOC(virtadr
, Mplus_AliasResolution
);
1607 oldval
= ReadDOC(doc
->virtadr
, AliasResolution
);
1608 newval
= ReadDOC(virtadr
, AliasResolution
);
1610 if (oldval
!= newval
)
1612 if (ChipID
== DOC_ChipID_DocMilPlus16
) {
1613 WriteDOC(~newval
, virtadr
, Mplus_AliasResolution
);
1614 oldval
= ReadDOC(doc
->virtadr
, Mplus_AliasResolution
);
1615 WriteDOC(newval
, virtadr
, Mplus_AliasResolution
); /* restore it */
1617 WriteDOC(~newval
, virtadr
, AliasResolution
);
1618 oldval
= ReadDOC(doc
->virtadr
, AliasResolution
);
1619 WriteDOC(newval
, virtadr
, AliasResolution
); /* restore it */
1622 if (oldval
== newval
) {
1623 printk(KERN_DEBUG
"Found alias of DOC at 0x%lx to 0x%lx\n", doc
->physadr
, physadr
);
1628 printk(KERN_NOTICE
"DiskOnChip found at 0x%lx\n", physadr
);
1630 len
= sizeof(struct mtd_info
) +
1631 sizeof(struct nand_chip
) + sizeof(struct doc_priv
) + (2 * sizeof(struct nand_bbt_descr
));
1632 mtd
= kzalloc(len
, GFP_KERNEL
);
1634 printk(KERN_ERR
"DiskOnChip kmalloc (%d bytes) failed!\n", len
);
1639 nand
= (struct nand_chip
*) (mtd
+ 1);
1640 doc
= (struct doc_priv
*) (nand
+ 1);
1641 nand
->bbt_td
= (struct nand_bbt_descr
*) (doc
+ 1);
1642 nand
->bbt_md
= nand
->bbt_td
+ 1;
1645 mtd
->owner
= THIS_MODULE
;
1648 nand
->select_chip
= doc200x_select_chip
;
1649 nand
->cmd_ctrl
= doc200x_hwcontrol
;
1650 nand
->dev_ready
= doc200x_dev_ready
;
1651 nand
->waitfunc
= doc200x_wait
;
1652 nand
->block_bad
= doc200x_block_bad
;
1653 nand
->ecc
.hwctl
= doc200x_enable_hwecc
;
1654 nand
->ecc
.calculate
= doc200x_calculate_ecc
;
1655 nand
->ecc
.correct
= doc200x_correct_data
;
1657 nand
->ecc
.layout
= &doc200x_oobinfo
;
1658 nand
->ecc
.mode
= NAND_ECC_HW_SYNDROME
;
1659 nand
->ecc
.size
= 512;
1660 nand
->ecc
.bytes
= 6;
1661 nand
->ecc
.strength
= 2;
1662 nand
->bbt_options
= NAND_BBT_USE_FLASH
;
1664 doc
->physadr
= physadr
;
1665 doc
->virtadr
= virtadr
;
1666 doc
->ChipID
= ChipID
;
1671 doc
->nextdoc
= doclist
;
1673 if (ChipID
== DOC_ChipID_Doc2k
)
1674 numchips
= doc2000_init(mtd
);
1675 else if (ChipID
== DOC_ChipID_DocMilPlus16
)
1676 numchips
= doc2001plus_init(mtd
);
1678 numchips
= doc2001_init(mtd
);
1680 if ((ret
= nand_scan(mtd
, numchips
))) {
1681 /* DBB note: i believe nand_release is necessary here, as
1682 buffers may have been allocated in nand_base. Check with
1684 /* nand_release will call del_mtd_device, but we haven't yet
1685 added it. This is handled without incident by
1686 del_mtd_device, as far as I can tell. */
1697 /* Put back the contents of the DOCControl register, in case it's not
1698 actually a DiskOnChip. */
1699 WriteDOC(save_control
, virtadr
, DOCControl
);
1705 static void release_nanddoc(void)
1707 struct mtd_info
*mtd
, *nextmtd
;
1708 struct nand_chip
*nand
;
1709 struct doc_priv
*doc
;
1711 for (mtd
= doclist
; mtd
; mtd
= nextmtd
) {
1715 nextmtd
= doc
->nextdoc
;
1717 iounmap(doc
->virtadr
);
1722 static int __init
init_nanddoc(void)
1726 /* We could create the decoder on demand, if memory is a concern.
1727 * This way we have it handy, if an error happens
1729 * Symbolsize is 10 (bits)
1730 * Primitve polynomial is x^10+x^3+1
1731 * first consecutive root is 510
1732 * primitve element to generate roots = 1
1733 * generator polinomial degree = 4
1735 rs_decoder
= init_rs(10, 0x409, FCR
, 1, NROOTS
);
1737 printk(KERN_ERR
"DiskOnChip: Could not create a RS decoder\n");
1741 if (doc_config_location
) {
1742 printk(KERN_INFO
"Using configured DiskOnChip probe address 0x%lx\n", doc_config_location
);
1743 ret
= doc_probe(doc_config_location
);
1747 for (i
= 0; (doc_locations
[i
] != 0xffffffff); i
++) {
1748 doc_probe(doc_locations
[i
]);
1751 /* No banner message any more. Print a message if no DiskOnChip
1752 found, so the user knows we at least tried. */
1754 printk(KERN_INFO
"No valid DiskOnChip devices found\n");
1760 free_rs(rs_decoder
);
1764 static void __exit
cleanup_nanddoc(void)
1766 /* Cleanup the nand/DoC resources */
1769 /* Free the reed solomon resources */
1771 free_rs(rs_decoder
);
1775 module_init(init_nanddoc
);
1776 module_exit(cleanup_nanddoc
);
1778 MODULE_LICENSE("GPL");
1779 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
1780 MODULE_DESCRIPTION("M-Systems DiskOnChip 2000, Millennium and Millennium Plus device driver\n");