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
19 * $Id: diskonchip.c,v 1.45 2005/01/05 18:05:14 dwmw2 Exp $
24 #if !defined(CFG_NAND_LEGACY)
26 #include <linux/kernel.h>
27 #include <linux/init.h>
28 #include <linux/sched.h>
29 #include <linux/delay.h>
30 #include <linux/rslib.h>
31 #include <linux/moduleparam.h>
34 #include <linux/mtd/mtd.h>
35 #include <linux/mtd/nand.h>
36 #include <linux/mtd/doc2000.h>
37 #include <linux/mtd/compatmac.h>
38 #include <linux/mtd/partitions.h>
39 #include <linux/mtd/inftl.h>
41 /* Where to look for the devices? */
42 #ifndef CONFIG_MTD_DISKONCHIP_PROBE_ADDRESS
43 #define CONFIG_MTD_DISKONCHIP_PROBE_ADDRESS 0
46 static unsigned long __initdata doc_locations
[] = {
47 #if defined (__alpha__) || defined(__i386__) || defined(__x86_64__)
48 #ifdef CONFIG_MTD_DISKONCHIP_PROBE_HIGH
49 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000,
50 0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000,
51 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000,
52 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000,
53 0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000,
54 #else /* CONFIG_MTD_DOCPROBE_HIGH */
55 0xc8000, 0xca000, 0xcc000, 0xce000,
56 0xd0000, 0xd2000, 0xd4000, 0xd6000,
57 0xd8000, 0xda000, 0xdc000, 0xde000,
58 0xe0000, 0xe2000, 0xe4000, 0xe6000,
59 0xe8000, 0xea000, 0xec000, 0xee000,
60 #endif /* CONFIG_MTD_DOCPROBE_HIGH */
61 #elif defined(__PPC__)
63 #elif defined(CONFIG_MOMENCO_OCELOT)
66 #elif defined(CONFIG_MOMENCO_OCELOT_G) || defined (CONFIG_MOMENCO_OCELOT_C)
69 #warning Unknown architecture for DiskOnChip. No default probe locations defined
73 static struct mtd_info
*doclist
= NULL
;
76 void __iomem
*virtadr
;
77 unsigned long physadr
;
80 int chips_per_floor
; /* The number of chips detected on each floor */
85 struct mtd_info
*nextdoc
;
88 /* Max number of eraseblocks to scan (from start of device) for the (I)NFTL
89 MediaHeader. The spec says to just keep going, I think, but that's just
91 #define MAX_MEDIAHEADER_SCAN 8
93 /* This is the syndrome computed by the HW ecc generator upon reading an empty
94 page, one with all 0xff for data and stored ecc code. */
95 static u_char empty_read_syndrome
[6] = { 0x26, 0xff, 0x6d, 0x47, 0x73, 0x7a };
96 /* This is the ecc value computed by the HW ecc generator upon writing an empty
97 page, one with all 0xff for data. */
98 static u_char empty_write_ecc
[6] = { 0x4b, 0x00, 0xe2, 0x0e, 0x93, 0xf7 };
100 #define INFTL_BBT_RESERVED_BLOCKS 4
102 #define DoC_is_MillenniumPlus(doc) ((doc)->ChipID == DOC_ChipID_DocMilPlus16 || (doc)->ChipID == DOC_ChipID_DocMilPlus32)
103 #define DoC_is_Millennium(doc) ((doc)->ChipID == DOC_ChipID_DocMil)
104 #define DoC_is_2000(doc) ((doc)->ChipID == DOC_ChipID_Doc2k)
106 static void doc200x_hwcontrol(struct mtd_info
*mtd
, int cmd
);
107 static void doc200x_select_chip(struct mtd_info
*mtd
, int chip
);
110 module_param(debug
, int, 0);
112 static int try_dword
=1;
113 module_param(try_dword
, int, 0);
115 static int no_ecc_failures
=0;
116 module_param(no_ecc_failures
, int, 0);
118 #ifdef CONFIG_MTD_PARTITIONS
119 static int no_autopart
=0;
120 module_param(no_autopart
, int, 0);
123 #ifdef CONFIG_MTD_NAND_DISKONCHIP_BBTWRITE
124 static int inftl_bbt_write
=1;
126 static int inftl_bbt_write
=0;
128 module_param(inftl_bbt_write
, int, 0);
130 static unsigned long doc_config_location
= CONFIG_MTD_DISKONCHIP_PROBE_ADDRESS
;
131 module_param(doc_config_location
, ulong
, 0);
132 MODULE_PARM_DESC(doc_config_location
, "Physical memory address at which to probe for DiskOnChip");
135 /* Sector size for HW ECC */
136 #define SECTOR_SIZE 512
137 /* The sector bytes are packed into NB_DATA 10 bit words */
138 #define NB_DATA (((SECTOR_SIZE + 1) * 8 + 6) / 10)
139 /* Number of roots */
141 /* First consective root */
143 /* Number of symbols */
146 /* the Reed Solomon control structure */
147 static struct rs_control
*rs_decoder
;
150 * The HW decoder in the DoC ASIC's provides us a error syndrome,
151 * which we must convert to a standard syndrom usable by the generic
152 * Reed-Solomon library code.
154 * Fabrice Bellard figured this out in the old docecc code. I added
155 * some comments, improved a minor bit and converted it to make use
156 * of the generic Reed-Solomon libary. tglx
158 static int doc_ecc_decode (struct rs_control
*rs
, uint8_t *data
, uint8_t *ecc
)
160 int i
, j
, nerr
, errpos
[8];
162 uint16_t ds
[4], s
[5], tmp
, errval
[8], syn
[4];
164 /* Convert the ecc bytes into words */
165 ds
[0] = ((ecc
[4] & 0xff) >> 0) | ((ecc
[5] & 0x03) << 8);
166 ds
[1] = ((ecc
[5] & 0xfc) >> 2) | ((ecc
[2] & 0x0f) << 6);
167 ds
[2] = ((ecc
[2] & 0xf0) >> 4) | ((ecc
[3] & 0x3f) << 4);
168 ds
[3] = ((ecc
[3] & 0xc0) >> 6) | ((ecc
[0] & 0xff) << 2);
171 /* Initialize the syndrom buffer */
172 for (i
= 0; i
< NROOTS
; i
++)
176 * s[i] = ds[3]x^3 + ds[2]x^2 + ds[1]x^1 + ds[0]
177 * where x = alpha^(FCR + i)
179 for(j
= 1; j
< NROOTS
; j
++) {
182 tmp
= rs
->index_of
[ds
[j
]];
183 for(i
= 0; i
< NROOTS
; i
++)
184 s
[i
] ^= rs
->alpha_to
[rs_modnn(rs
, tmp
+ (FCR
+ i
) * j
)];
187 /* Calc s[i] = s[i] / alpha^(v + i) */
188 for (i
= 0; i
< NROOTS
; i
++) {
190 syn
[i
] = rs_modnn(rs
, rs
->index_of
[s
[i
]] + (NN
- FCR
- i
));
192 /* Call the decoder library */
193 nerr
= decode_rs16(rs
, NULL
, NULL
, 1019, syn
, 0, errpos
, 0, errval
);
195 /* Incorrectable errors ? */
200 * Correct the errors. The bitpositions are a bit of magic,
201 * but they are given by the design of the de/encoder circuit
204 for(i
= 0;i
< nerr
; i
++) {
205 int index
, bitpos
, pos
= 1015 - errpos
[i
];
207 if (pos
>= NB_DATA
&& pos
< 1019)
210 /* extract bit position (MSB first) */
211 pos
= 10 * (NB_DATA
- 1 - pos
) - 6;
212 /* now correct the following 10 bits. At most two bytes
213 can be modified since pos is even */
214 index
= (pos
>> 3) ^ 1;
216 if ((index
>= 0 && index
< SECTOR_SIZE
) ||
217 index
== (SECTOR_SIZE
+ 1)) {
218 val
= (uint8_t) (errval
[i
] >> (2 + bitpos
));
220 if (index
< SECTOR_SIZE
)
223 index
= ((pos
>> 3) + 1) ^ 1;
224 bitpos
= (bitpos
+ 10) & 7;
227 if ((index
>= 0 && index
< SECTOR_SIZE
) ||
228 index
== (SECTOR_SIZE
+ 1)) {
229 val
= (uint8_t)(errval
[i
] << (8 - bitpos
));
231 if (index
< SECTOR_SIZE
)
236 /* If the parity is wrong, no rescue possible */
237 return parity
? -1 : nerr
;
240 static void DoC_Delay(struct doc_priv
*doc
, unsigned short cycles
)
245 for (i
= 0; i
< cycles
; i
++) {
246 if (DoC_is_Millennium(doc
))
247 dummy
= ReadDOC(doc
->virtadr
, NOP
);
248 else if (DoC_is_MillenniumPlus(doc
))
249 dummy
= ReadDOC(doc
->virtadr
, Mplus_NOP
);
251 dummy
= ReadDOC(doc
->virtadr
, DOCStatus
);
256 #define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1)
258 /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */
259 static int _DoC_WaitReady(struct doc_priv
*doc
)
261 void __iomem
*docptr
= doc
->virtadr
;
262 unsigned long timeo
= jiffies
+ (HZ
* 10);
264 if(debug
) printk("_DoC_WaitReady...\n");
265 /* Out-of-line routine to wait for chip response */
266 if (DoC_is_MillenniumPlus(doc
)) {
267 while ((ReadDOC(docptr
, Mplus_FlashControl
) & CDSN_CTRL_FR_B_MASK
) != CDSN_CTRL_FR_B_MASK
) {
268 if (time_after(jiffies
, timeo
)) {
269 printk("_DoC_WaitReady timed out.\n");
276 while (!(ReadDOC(docptr
, CDSNControl
) & CDSN_CTRL_FR_B
)) {
277 if (time_after(jiffies
, timeo
)) {
278 printk("_DoC_WaitReady timed out.\n");
289 static inline int DoC_WaitReady(struct doc_priv
*doc
)
291 void __iomem
*docptr
= doc
->virtadr
;
294 if (DoC_is_MillenniumPlus(doc
)) {
297 if ((ReadDOC(docptr
, Mplus_FlashControl
) & CDSN_CTRL_FR_B_MASK
) != CDSN_CTRL_FR_B_MASK
)
298 /* Call the out-of-line routine to wait */
299 ret
= _DoC_WaitReady(doc
);
303 if (!(ReadDOC(docptr
, CDSNControl
) & CDSN_CTRL_FR_B
))
304 /* Call the out-of-line routine to wait */
305 ret
= _DoC_WaitReady(doc
);
309 if(debug
) printk("DoC_WaitReady OK\n");
313 static void doc2000_write_byte(struct mtd_info
*mtd
, u_char datum
)
315 struct nand_chip
*this = mtd
->priv
;
316 struct doc_priv
*doc
= this->priv
;
317 void __iomem
*docptr
= doc
->virtadr
;
319 if(debug
)printk("write_byte %02x\n", datum
);
320 WriteDOC(datum
, docptr
, CDSNSlowIO
);
321 WriteDOC(datum
, docptr
, 2k_CDSN_IO
);
324 static u_char
doc2000_read_byte(struct mtd_info
*mtd
)
326 struct nand_chip
*this = mtd
->priv
;
327 struct doc_priv
*doc
= this->priv
;
328 void __iomem
*docptr
= doc
->virtadr
;
331 ReadDOC(docptr
, CDSNSlowIO
);
333 ret
= ReadDOC(docptr
, 2k_CDSN_IO
);
334 if (debug
) printk("read_byte returns %02x\n", ret
);
338 static void doc2000_writebuf(struct mtd_info
*mtd
,
339 const u_char
*buf
, int len
)
341 struct nand_chip
*this = mtd
->priv
;
342 struct doc_priv
*doc
= this->priv
;
343 void __iomem
*docptr
= doc
->virtadr
;
345 if (debug
)printk("writebuf of %d bytes: ", len
);
346 for (i
=0; i
< len
; i
++) {
347 WriteDOC_(buf
[i
], docptr
, DoC_2k_CDSN_IO
+ i
);
349 printk("%02x ", buf
[i
]);
351 if (debug
) printk("\n");
354 static void doc2000_readbuf(struct mtd_info
*mtd
,
355 u_char
*buf
, int len
)
357 struct nand_chip
*this = mtd
->priv
;
358 struct doc_priv
*doc
= this->priv
;
359 void __iomem
*docptr
= doc
->virtadr
;
362 if (debug
)printk("readbuf of %d bytes: ", len
);
364 for (i
=0; i
< len
; i
++) {
365 buf
[i
] = ReadDOC(docptr
, 2k_CDSN_IO
+ i
);
369 static void doc2000_readbuf_dword(struct mtd_info
*mtd
,
370 u_char
*buf
, int len
)
372 struct nand_chip
*this = mtd
->priv
;
373 struct doc_priv
*doc
= this->priv
;
374 void __iomem
*docptr
= doc
->virtadr
;
377 if (debug
) printk("readbuf_dword of %d bytes: ", len
);
379 if (unlikely((((unsigned long)buf
)|len
) & 3)) {
380 for (i
=0; i
< len
; i
++) {
381 *(uint8_t *)(&buf
[i
]) = ReadDOC(docptr
, 2k_CDSN_IO
+ i
);
384 for (i
=0; i
< len
; i
+=4) {
385 *(uint32_t*)(&buf
[i
]) = readl(docptr
+ DoC_2k_CDSN_IO
+ i
);
390 static int doc2000_verifybuf(struct mtd_info
*mtd
,
391 const u_char
*buf
, int len
)
393 struct nand_chip
*this = mtd
->priv
;
394 struct doc_priv
*doc
= this->priv
;
395 void __iomem
*docptr
= doc
->virtadr
;
398 for (i
=0; i
< len
; i
++)
399 if (buf
[i
] != ReadDOC(docptr
, 2k_CDSN_IO
))
404 static uint16_t __init
doc200x_ident_chip(struct mtd_info
*mtd
, int nr
)
406 struct nand_chip
*this = mtd
->priv
;
407 struct doc_priv
*doc
= this->priv
;
410 doc200x_select_chip(mtd
, nr
);
411 doc200x_hwcontrol(mtd
, NAND_CTL_SETCLE
);
412 this->write_byte(mtd
, NAND_CMD_READID
);
413 doc200x_hwcontrol(mtd
, NAND_CTL_CLRCLE
);
414 doc200x_hwcontrol(mtd
, NAND_CTL_SETALE
);
415 this->write_byte(mtd
, 0);
416 doc200x_hwcontrol(mtd
, NAND_CTL_CLRALE
);
418 ret
= this->read_byte(mtd
) << 8;
419 ret
|= this->read_byte(mtd
);
421 if (doc
->ChipID
== DOC_ChipID_Doc2k
&& try_dword
&& !nr
) {
422 /* First chip probe. See if we get same results by 32-bit access */
427 void __iomem
*docptr
= doc
->virtadr
;
429 doc200x_hwcontrol(mtd
, NAND_CTL_SETCLE
);
430 doc2000_write_byte(mtd
, NAND_CMD_READID
);
431 doc200x_hwcontrol(mtd
, NAND_CTL_CLRCLE
);
432 doc200x_hwcontrol(mtd
, NAND_CTL_SETALE
);
433 doc2000_write_byte(mtd
, 0);
434 doc200x_hwcontrol(mtd
, NAND_CTL_CLRALE
);
436 ident
.dword
= readl(docptr
+ DoC_2k_CDSN_IO
);
437 if (((ident
.byte
[0] << 8) | ident
.byte
[1]) == ret
) {
438 printk(KERN_INFO
"DiskOnChip 2000 responds to DWORD access\n");
439 this->read_buf
= &doc2000_readbuf_dword
;
446 static void __init
doc2000_count_chips(struct mtd_info
*mtd
)
448 struct nand_chip
*this = mtd
->priv
;
449 struct doc_priv
*doc
= this->priv
;
453 /* Max 4 chips per floor on DiskOnChip 2000 */
454 doc
->chips_per_floor
= 4;
456 /* Find out what the first chip is */
457 mfrid
= doc200x_ident_chip(mtd
, 0);
459 /* Find how many chips in each floor. */
460 for (i
= 1; i
< 4; i
++) {
461 if (doc200x_ident_chip(mtd
, i
) != mfrid
)
464 doc
->chips_per_floor
= i
;
465 printk(KERN_DEBUG
"Detected %d chips per floor.\n", i
);
468 static int doc200x_wait(struct mtd_info
*mtd
, struct nand_chip
*this, int state
)
470 struct doc_priv
*doc
= this->priv
;
475 this->cmdfunc(mtd
, NAND_CMD_STATUS
, -1, -1);
477 status
= (int)this->read_byte(mtd
);
482 static void doc2001_write_byte(struct mtd_info
*mtd
, u_char datum
)
484 struct nand_chip
*this = mtd
->priv
;
485 struct doc_priv
*doc
= this->priv
;
486 void __iomem
*docptr
= doc
->virtadr
;
488 WriteDOC(datum
, docptr
, CDSNSlowIO
);
489 WriteDOC(datum
, docptr
, Mil_CDSN_IO
);
490 WriteDOC(datum
, docptr
, WritePipeTerm
);
493 static u_char
doc2001_read_byte(struct mtd_info
*mtd
)
495 struct nand_chip
*this = mtd
->priv
;
496 struct doc_priv
*doc
= this->priv
;
497 void __iomem
*docptr
= doc
->virtadr
;
499 /*ReadDOC(docptr, CDSNSlowIO); */
500 /* 11.4.5 -- delay twice to allow extended length cycle */
502 ReadDOC(docptr
, ReadPipeInit
);
503 /*return ReadDOC(docptr, Mil_CDSN_IO); */
504 return ReadDOC(docptr
, LastDataRead
);
507 static void doc2001_writebuf(struct mtd_info
*mtd
,
508 const u_char
*buf
, int len
)
510 struct nand_chip
*this = mtd
->priv
;
511 struct doc_priv
*doc
= this->priv
;
512 void __iomem
*docptr
= doc
->virtadr
;
515 for (i
=0; i
< len
; i
++)
516 WriteDOC_(buf
[i
], docptr
, DoC_Mil_CDSN_IO
+ i
);
517 /* Terminate write pipeline */
518 WriteDOC(0x00, docptr
, WritePipeTerm
);
521 static void doc2001_readbuf(struct mtd_info
*mtd
,
522 u_char
*buf
, int len
)
524 struct nand_chip
*this = mtd
->priv
;
525 struct doc_priv
*doc
= this->priv
;
526 void __iomem
*docptr
= doc
->virtadr
;
529 /* Start read pipeline */
530 ReadDOC(docptr
, ReadPipeInit
);
532 for (i
=0; i
< len
-1; i
++)
533 buf
[i
] = ReadDOC(docptr
, Mil_CDSN_IO
+ (i
& 0xff));
535 /* Terminate read pipeline */
536 buf
[i
] = ReadDOC(docptr
, LastDataRead
);
539 static int doc2001_verifybuf(struct mtd_info
*mtd
,
540 const u_char
*buf
, int len
)
542 struct nand_chip
*this = mtd
->priv
;
543 struct doc_priv
*doc
= this->priv
;
544 void __iomem
*docptr
= doc
->virtadr
;
547 /* Start read pipeline */
548 ReadDOC(docptr
, ReadPipeInit
);
550 for (i
=0; i
< len
-1; i
++)
551 if (buf
[i
] != ReadDOC(docptr
, Mil_CDSN_IO
)) {
552 ReadDOC(docptr
, LastDataRead
);
555 if (buf
[i
] != ReadDOC(docptr
, LastDataRead
))
560 static u_char
doc2001plus_read_byte(struct mtd_info
*mtd
)
562 struct nand_chip
*this = mtd
->priv
;
563 struct doc_priv
*doc
= this->priv
;
564 void __iomem
*docptr
= doc
->virtadr
;
567 ReadDOC(docptr
, Mplus_ReadPipeInit
);
568 ReadDOC(docptr
, Mplus_ReadPipeInit
);
569 ret
= ReadDOC(docptr
, Mplus_LastDataRead
);
570 if (debug
) printk("read_byte returns %02x\n", ret
);
574 static void doc2001plus_writebuf(struct mtd_info
*mtd
,
575 const u_char
*buf
, int len
)
577 struct nand_chip
*this = mtd
->priv
;
578 struct doc_priv
*doc
= this->priv
;
579 void __iomem
*docptr
= doc
->virtadr
;
582 if (debug
)printk("writebuf of %d bytes: ", len
);
583 for (i
=0; i
< len
; i
++) {
584 WriteDOC_(buf
[i
], docptr
, DoC_Mil_CDSN_IO
+ i
);
586 printk("%02x ", buf
[i
]);
588 if (debug
) printk("\n");
591 static void doc2001plus_readbuf(struct mtd_info
*mtd
,
592 u_char
*buf
, int len
)
594 struct nand_chip
*this = mtd
->priv
;
595 struct doc_priv
*doc
= this->priv
;
596 void __iomem
*docptr
= doc
->virtadr
;
599 if (debug
)printk("readbuf of %d bytes: ", len
);
601 /* Start read pipeline */
602 ReadDOC(docptr
, Mplus_ReadPipeInit
);
603 ReadDOC(docptr
, Mplus_ReadPipeInit
);
605 for (i
=0; i
< len
-2; i
++) {
606 buf
[i
] = ReadDOC(docptr
, Mil_CDSN_IO
);
608 printk("%02x ", buf
[i
]);
611 /* Terminate read pipeline */
612 buf
[len
-2] = ReadDOC(docptr
, Mplus_LastDataRead
);
614 printk("%02x ", buf
[len
-2]);
615 buf
[len
-1] = ReadDOC(docptr
, Mplus_LastDataRead
);
617 printk("%02x ", buf
[len
-1]);
618 if (debug
) printk("\n");
621 static int doc2001plus_verifybuf(struct mtd_info
*mtd
,
622 const u_char
*buf
, int len
)
624 struct nand_chip
*this = mtd
->priv
;
625 struct doc_priv
*doc
= this->priv
;
626 void __iomem
*docptr
= doc
->virtadr
;
629 if (debug
)printk("verifybuf of %d bytes: ", len
);
631 /* Start read pipeline */
632 ReadDOC(docptr
, Mplus_ReadPipeInit
);
633 ReadDOC(docptr
, Mplus_ReadPipeInit
);
635 for (i
=0; i
< len
-2; i
++)
636 if (buf
[i
] != ReadDOC(docptr
, Mil_CDSN_IO
)) {
637 ReadDOC(docptr
, Mplus_LastDataRead
);
638 ReadDOC(docptr
, Mplus_LastDataRead
);
641 if (buf
[len
-2] != ReadDOC(docptr
, Mplus_LastDataRead
))
643 if (buf
[len
-1] != ReadDOC(docptr
, Mplus_LastDataRead
))
648 static void doc2001plus_select_chip(struct mtd_info
*mtd
, int chip
)
650 struct nand_chip
*this = mtd
->priv
;
651 struct doc_priv
*doc
= this->priv
;
652 void __iomem
*docptr
= doc
->virtadr
;
655 if(debug
)printk("select chip (%d)\n", chip
);
658 /* Disable flash internally */
659 WriteDOC(0, docptr
, Mplus_FlashSelect
);
663 floor
= chip
/ doc
->chips_per_floor
;
664 chip
-= (floor
* doc
->chips_per_floor
);
666 /* Assert ChipEnable and deassert WriteProtect */
667 WriteDOC((DOC_FLASH_CE
), docptr
, Mplus_FlashSelect
);
668 this->cmdfunc(mtd
, NAND_CMD_RESET
, -1, -1);
671 doc
->curfloor
= floor
;
674 static void doc200x_select_chip(struct mtd_info
*mtd
, int chip
)
676 struct nand_chip
*this = mtd
->priv
;
677 struct doc_priv
*doc
= this->priv
;
678 void __iomem
*docptr
= doc
->virtadr
;
681 if(debug
)printk("select chip (%d)\n", chip
);
686 floor
= chip
/ doc
->chips_per_floor
;
687 chip
-= (floor
* doc
->chips_per_floor
);
689 /* 11.4.4 -- deassert CE before changing chip */
690 doc200x_hwcontrol(mtd
, NAND_CTL_CLRNCE
);
692 WriteDOC(floor
, docptr
, FloorSelect
);
693 WriteDOC(chip
, docptr
, CDSNDeviceSelect
);
695 doc200x_hwcontrol(mtd
, NAND_CTL_SETNCE
);
698 doc
->curfloor
= floor
;
701 static void doc200x_hwcontrol(struct mtd_info
*mtd
, int cmd
)
703 struct nand_chip
*this = mtd
->priv
;
704 struct doc_priv
*doc
= this->priv
;
705 void __iomem
*docptr
= doc
->virtadr
;
708 case NAND_CTL_SETNCE
:
709 doc
->CDSNControl
|= CDSN_CTRL_CE
;
711 case NAND_CTL_CLRNCE
:
712 doc
->CDSNControl
&= ~CDSN_CTRL_CE
;
714 case NAND_CTL_SETCLE
:
715 doc
->CDSNControl
|= CDSN_CTRL_CLE
;
717 case NAND_CTL_CLRCLE
:
718 doc
->CDSNControl
&= ~CDSN_CTRL_CLE
;
720 case NAND_CTL_SETALE
:
721 doc
->CDSNControl
|= CDSN_CTRL_ALE
;
723 case NAND_CTL_CLRALE
:
724 doc
->CDSNControl
&= ~CDSN_CTRL_ALE
;
727 doc
->CDSNControl
|= CDSN_CTRL_WP
;
730 doc
->CDSNControl
&= ~CDSN_CTRL_WP
;
733 if (debug
)printk("hwcontrol(%d): %02x\n", cmd
, doc
->CDSNControl
);
734 WriteDOC(doc
->CDSNControl
, docptr
, CDSNControl
);
735 /* 11.4.3 -- 4 NOPs after CSDNControl write */
739 static void doc2001plus_command (struct mtd_info
*mtd
, unsigned command
, int column
, int page_addr
)
741 struct nand_chip
*this = mtd
->priv
;
742 struct doc_priv
*doc
= this->priv
;
743 void __iomem
*docptr
= doc
->virtadr
;
746 * Must terminate write pipeline before sending any commands
749 if (command
== NAND_CMD_PAGEPROG
) {
750 WriteDOC(0x00, docptr
, Mplus_WritePipeTerm
);
751 WriteDOC(0x00, docptr
, Mplus_WritePipeTerm
);
755 * Write out the command to the device.
757 if (command
== NAND_CMD_SEQIN
) {
760 if (column
>= mtd
->oobblock
) {
762 column
-= mtd
->oobblock
;
763 readcmd
= NAND_CMD_READOOB
;
764 } else if (column
< 256) {
765 /* First 256 bytes --> READ0 */
766 readcmd
= NAND_CMD_READ0
;
769 readcmd
= NAND_CMD_READ1
;
771 WriteDOC(readcmd
, docptr
, Mplus_FlashCmd
);
773 WriteDOC(command
, docptr
, Mplus_FlashCmd
);
774 WriteDOC(0, docptr
, Mplus_WritePipeTerm
);
775 WriteDOC(0, docptr
, Mplus_WritePipeTerm
);
777 if (column
!= -1 || page_addr
!= -1) {
778 /* Serially input address */
780 /* Adjust columns for 16 bit buswidth */
781 if (this->options
& NAND_BUSWIDTH_16
)
783 WriteDOC(column
, docptr
, Mplus_FlashAddress
);
785 if (page_addr
!= -1) {
786 WriteDOC((unsigned char) (page_addr
& 0xff), docptr
, Mplus_FlashAddress
);
787 WriteDOC((unsigned char) ((page_addr
>> 8) & 0xff), docptr
, Mplus_FlashAddress
);
788 /* One more address cycle for higher density devices */
789 if (this->chipsize
& 0x0c000000) {
790 WriteDOC((unsigned char) ((page_addr
>> 16) & 0x0f), docptr
, Mplus_FlashAddress
);
791 printk("high density\n");
794 WriteDOC(0, docptr
, Mplus_WritePipeTerm
);
795 WriteDOC(0, docptr
, Mplus_WritePipeTerm
);
797 if (command
== NAND_CMD_READ0
|| command
== NAND_CMD_READ1
|| command
== NAND_CMD_READOOB
|| command
== NAND_CMD_READID
)
798 WriteDOC(0, docptr
, Mplus_FlashControl
);
802 * program and erase have their own busy handlers
803 * status and sequential in needs no delay
807 case NAND_CMD_PAGEPROG
:
808 case NAND_CMD_ERASE1
:
809 case NAND_CMD_ERASE2
:
811 case NAND_CMD_STATUS
:
817 udelay(this->chip_delay
);
818 WriteDOC(NAND_CMD_STATUS
, docptr
, Mplus_FlashCmd
);
819 WriteDOC(0, docptr
, Mplus_WritePipeTerm
);
820 WriteDOC(0, docptr
, Mplus_WritePipeTerm
);
821 while ( !(this->read_byte(mtd
) & 0x40));
824 /* This applies to read commands */
827 * If we don't have access to the busy pin, we apply the given
830 if (!this->dev_ready
) {
831 udelay (this->chip_delay
);
836 /* Apply this short delay always to ensure that we do wait tWB in
837 * any case on any machine. */
839 /* wait until command is processed */
840 while (!this->dev_ready(mtd
));
843 static int doc200x_dev_ready(struct mtd_info
*mtd
)
845 struct nand_chip
*this = mtd
->priv
;
846 struct doc_priv
*doc
= this->priv
;
847 void __iomem
*docptr
= doc
->virtadr
;
849 if (DoC_is_MillenniumPlus(doc
)) {
850 /* 11.4.2 -- must NOP four times before checking FR/B# */
852 if ((ReadDOC(docptr
, Mplus_FlashControl
) & CDSN_CTRL_FR_B_MASK
) != CDSN_CTRL_FR_B_MASK
) {
854 printk("not ready\n");
857 if (debug
)printk("was ready\n");
860 /* 11.4.2 -- must NOP four times before checking FR/B# */
862 if (!(ReadDOC(docptr
, CDSNControl
) & CDSN_CTRL_FR_B
)) {
864 printk("not ready\n");
867 /* 11.4.2 -- Must NOP twice if it's ready */
869 if (debug
)printk("was ready\n");
874 static int doc200x_block_bad(struct mtd_info
*mtd
, loff_t ofs
, int getchip
)
876 /* This is our last resort if we couldn't find or create a BBT. Just
877 pretend all blocks are good. */
881 static void doc200x_enable_hwecc(struct mtd_info
*mtd
, int mode
)
883 struct nand_chip
*this = mtd
->priv
;
884 struct doc_priv
*doc
= this->priv
;
885 void __iomem
*docptr
= doc
->virtadr
;
887 /* Prime the ECC engine */
890 WriteDOC(DOC_ECC_RESET
, docptr
, ECCConf
);
891 WriteDOC(DOC_ECC_EN
, docptr
, ECCConf
);
894 WriteDOC(DOC_ECC_RESET
, docptr
, ECCConf
);
895 WriteDOC(DOC_ECC_EN
| DOC_ECC_RW
, docptr
, ECCConf
);
900 static void doc2001plus_enable_hwecc(struct mtd_info
*mtd
, int mode
)
902 struct nand_chip
*this = mtd
->priv
;
903 struct doc_priv
*doc
= this->priv
;
904 void __iomem
*docptr
= doc
->virtadr
;
906 /* Prime the ECC engine */
909 WriteDOC(DOC_ECC_RESET
, docptr
, Mplus_ECCConf
);
910 WriteDOC(DOC_ECC_EN
, docptr
, Mplus_ECCConf
);
913 WriteDOC(DOC_ECC_RESET
, docptr
, Mplus_ECCConf
);
914 WriteDOC(DOC_ECC_EN
| DOC_ECC_RW
, docptr
, Mplus_ECCConf
);
919 /* This code is only called on write */
920 static int doc200x_calculate_ecc(struct mtd_info
*mtd
, const u_char
*dat
,
921 unsigned char *ecc_code
)
923 struct nand_chip
*this = mtd
->priv
;
924 struct doc_priv
*doc
= this->priv
;
925 void __iomem
*docptr
= doc
->virtadr
;
929 /* flush the pipeline */
930 if (DoC_is_2000(doc
)) {
931 WriteDOC(doc
->CDSNControl
& ~CDSN_CTRL_FLASH_IO
, docptr
, CDSNControl
);
932 WriteDOC(0, docptr
, 2k_CDSN_IO
);
933 WriteDOC(0, docptr
, 2k_CDSN_IO
);
934 WriteDOC(0, docptr
, 2k_CDSN_IO
);
935 WriteDOC(doc
->CDSNControl
, docptr
, CDSNControl
);
936 } else if (DoC_is_MillenniumPlus(doc
)) {
937 WriteDOC(0, docptr
, Mplus_NOP
);
938 WriteDOC(0, docptr
, Mplus_NOP
);
939 WriteDOC(0, docptr
, Mplus_NOP
);
941 WriteDOC(0, docptr
, NOP
);
942 WriteDOC(0, docptr
, NOP
);
943 WriteDOC(0, docptr
, NOP
);
946 for (i
= 0; i
< 6; i
++) {
947 if (DoC_is_MillenniumPlus(doc
))
948 ecc_code
[i
] = ReadDOC_(docptr
, DoC_Mplus_ECCSyndrome0
+ i
);
950 ecc_code
[i
] = ReadDOC_(docptr
, DoC_ECCSyndrome0
+ i
);
951 if (ecc_code
[i
] != empty_write_ecc
[i
])
954 if (DoC_is_MillenniumPlus(doc
))
955 WriteDOC(DOC_ECC_DIS
, docptr
, Mplus_ECCConf
);
957 WriteDOC(DOC_ECC_DIS
, docptr
, ECCConf
);
959 /* If emptymatch=1, we might have an all-0xff data buffer. Check. */
961 /* Note: this somewhat expensive test should not be triggered
962 often. It could be optimized away by examining the data in
963 the writebuf routine, and remembering the result. */
964 for (i
= 0; i
< 512; i
++) {
965 if (dat
[i
] == 0xff) continue;
970 /* If emptymatch still =1, we do have an all-0xff data buffer.
971 Return all-0xff ecc value instead of the computed one, so
972 it'll look just like a freshly-erased page. */
973 if (emptymatch
) memset(ecc_code
, 0xff, 6);
978 static int doc200x_correct_data(struct mtd_info
*mtd
, u_char
*dat
, u_char
*read_ecc
, u_char
*calc_ecc
)
981 struct nand_chip
*this = mtd
->priv
;
982 struct doc_priv
*doc
= this->priv
;
983 void __iomem
*docptr
= doc
->virtadr
;
984 volatile u_char dummy
;
987 /* flush the pipeline */
988 if (DoC_is_2000(doc
)) {
989 dummy
= ReadDOC(docptr
, 2k_ECCStatus
);
990 dummy
= ReadDOC(docptr
, 2k_ECCStatus
);
991 dummy
= ReadDOC(docptr
, 2k_ECCStatus
);
992 } else if (DoC_is_MillenniumPlus(doc
)) {
993 dummy
= ReadDOC(docptr
, Mplus_ECCConf
);
994 dummy
= ReadDOC(docptr
, Mplus_ECCConf
);
995 dummy
= ReadDOC(docptr
, Mplus_ECCConf
);
997 dummy
= ReadDOC(docptr
, ECCConf
);
998 dummy
= ReadDOC(docptr
, ECCConf
);
999 dummy
= ReadDOC(docptr
, ECCConf
);
1002 /* Error occured ? */
1004 for (i
= 0; i
< 6; i
++) {
1005 if (DoC_is_MillenniumPlus(doc
))
1006 calc_ecc
[i
] = ReadDOC_(docptr
, DoC_Mplus_ECCSyndrome0
+ i
);
1008 calc_ecc
[i
] = ReadDOC_(docptr
, DoC_ECCSyndrome0
+ i
);
1009 if (calc_ecc
[i
] != empty_read_syndrome
[i
])
1012 /* If emptymatch=1, the read syndrome is consistent with an
1013 all-0xff data and stored ecc block. Check the stored ecc. */
1015 for (i
= 0; i
< 6; i
++) {
1016 if (read_ecc
[i
] == 0xff) continue;
1021 /* If emptymatch still =1, check the data block. */
1023 /* Note: this somewhat expensive test should not be triggered
1024 often. It could be optimized away by examining the data in
1025 the readbuf routine, and remembering the result. */
1026 for (i
= 0; i
< 512; i
++) {
1027 if (dat
[i
] == 0xff) continue;
1032 /* If emptymatch still =1, this is almost certainly a freshly-
1033 erased block, in which case the ECC will not come out right.
1034 We'll suppress the error and tell the caller everything's
1035 OK. Because it is. */
1036 if (!emptymatch
) ret
= doc_ecc_decode (rs_decoder
, dat
, calc_ecc
);
1038 printk(KERN_ERR
"doc200x_correct_data corrected %d errors\n", ret
);
1040 if (DoC_is_MillenniumPlus(doc
))
1041 WriteDOC(DOC_ECC_DIS
, docptr
, Mplus_ECCConf
);
1043 WriteDOC(DOC_ECC_DIS
, docptr
, ECCConf
);
1044 if (no_ecc_failures
&& (ret
== -1)) {
1045 printk(KERN_ERR
"suppressing ECC failure\n");
1051 /*u_char mydatabuf[528]; */
1053 static struct nand_oobinfo doc200x_oobinfo
= {
1054 .useecc
= MTD_NANDECC_AUTOPLACE
,
1056 .eccpos
= {0, 1, 2, 3, 4, 5},
1057 .oobfree
= { {8, 8} }
1060 /* Find the (I)NFTL Media Header, and optionally also the mirror media header.
1061 On sucessful return, buf will contain a copy of the media header for
1062 further processing. id is the string to scan for, and will presumably be
1063 either "ANAND" or "BNAND". If findmirror=1, also look for the mirror media
1064 header. The page #s of the found media headers are placed in mh0_page and
1065 mh1_page in the DOC private structure. */
1066 static int __init
find_media_headers(struct mtd_info
*mtd
, u_char
*buf
,
1067 const char *id
, int findmirror
)
1069 struct nand_chip
*this = mtd
->priv
;
1070 struct doc_priv
*doc
= this->priv
;
1071 unsigned offs
, end
= (MAX_MEDIAHEADER_SCAN
<< this->phys_erase_shift
);
1075 end
= min(end
, mtd
->size
); /* paranoia */
1076 for (offs
= 0; offs
< end
; offs
+= mtd
->erasesize
) {
1077 ret
= mtd
->read(mtd
, offs
, mtd
->oobblock
, &retlen
, buf
);
1078 if (retlen
!= mtd
->oobblock
) continue;
1080 printk(KERN_WARNING
"ECC error scanning DOC at 0x%x\n",
1083 if (memcmp(buf
, id
, 6)) continue;
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
;
1087 if (!findmirror
) return 1;
1090 doc
->mh1_page
= offs
>> this->page_shift
;
1093 if (doc
->mh0_page
== -1) {
1094 printk(KERN_WARNING
"DiskOnChip %s Media Header not found.\n", id
);
1097 /* Only one mediaheader was found. We want buf to contain a
1098 mediaheader on return, so we'll have to re-read the one we found. */
1099 offs
= doc
->mh0_page
<< this->page_shift
;
1100 ret
= mtd
->read(mtd
, offs
, mtd
->oobblock
, &retlen
, buf
);
1101 if (retlen
!= mtd
->oobblock
) {
1102 /* Insanity. Give up. */
1103 printk(KERN_ERR
"Read DiskOnChip Media Header once, but can't reread it???\n");
1109 static inline int __init
nftl_partscan(struct mtd_info
*mtd
,
1110 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
;
1118 unsigned blocks
, maxblocks
;
1119 int offs
, numheaders
;
1121 buf
= kmalloc(mtd
->oobblock
, GFP_KERNEL
);
1123 printk(KERN_ERR
"DiskOnChip mediaheader kmalloc failed!\n");
1126 if (!(numheaders
=find_media_headers(mtd
, buf
, "ANAND", 1))) goto out
;
1127 mh
= (struct NFTLMediaHeader
*) buf
;
1129 /*#ifdef CONFIG_MTD_DEBUG_VERBOSE */
1130 /* if (CONFIG_MTD_DEBUG_VERBOSE >= 2) */
1131 printk(KERN_INFO
" DataOrgID = %s\n"
1132 " NumEraseUnits = %d\n"
1133 " FirstPhysicalEUN = %d\n"
1134 " FormattedSize = %d\n"
1135 " UnitSizeFactor = %d\n",
1136 mh
->DataOrgID
, mh
->NumEraseUnits
,
1137 mh
->FirstPhysicalEUN
, mh
->FormattedSize
,
1138 mh
->UnitSizeFactor
);
1141 blocks
= mtd
->size
>> this->phys_erase_shift
;
1142 maxblocks
= min(32768U, mtd
->erasesize
- psize
);
1144 if (mh
->UnitSizeFactor
== 0x00) {
1145 /* Auto-determine UnitSizeFactor. The constraints are:
1146 - There can be at most 32768 virtual blocks.
1147 - There can be at most (virtual block size - page size)
1148 virtual blocks (because MediaHeader+BBT must fit in 1).
1150 mh
->UnitSizeFactor
= 0xff;
1151 while (blocks
> maxblocks
) {
1153 maxblocks
= min(32768U, (maxblocks
<< 1) + psize
);
1154 mh
->UnitSizeFactor
--;
1156 printk(KERN_WARNING
"UnitSizeFactor=0x00 detected. Correct value is assumed to be 0x%02x.\n", mh
->UnitSizeFactor
);
1159 /* NOTE: The lines below modify internal variables of the NAND and MTD
1160 layers; variables with have already been configured by nand_scan.
1161 Unfortunately, we didn't know before this point what these values
1162 should be. Thus, this code is somewhat dependant on the exact
1163 implementation of the NAND layer. */
1164 if (mh
->UnitSizeFactor
!= 0xff) {
1165 this->bbt_erase_shift
+= (0xff - mh
->UnitSizeFactor
);
1166 mtd
->erasesize
<<= (0xff - mh
->UnitSizeFactor
);
1167 printk(KERN_INFO
"Setting virtual erase size to %d\n", mtd
->erasesize
);
1168 blocks
= mtd
->size
>> this->bbt_erase_shift
;
1169 maxblocks
= min(32768U, mtd
->erasesize
- psize
);
1172 if (blocks
> maxblocks
) {
1173 printk(KERN_ERR
"UnitSizeFactor of 0x%02x is inconsistent with device size. Aborting.\n", mh
->UnitSizeFactor
);
1177 /* Skip past the media headers. */
1178 offs
= max(doc
->mh0_page
, doc
->mh1_page
);
1179 offs
<<= this->page_shift
;
1180 offs
+= mtd
->erasesize
;
1182 /*parts[0].name = " DiskOnChip Boot / Media Header partition"; */
1183 /*parts[0].offset = 0; */
1184 /*parts[0].size = offs; */
1186 parts
[0].name
= " DiskOnChip BDTL partition";
1187 parts
[0].offset
= offs
;
1188 parts
[0].size
= (mh
->NumEraseUnits
- numheaders
) << this->bbt_erase_shift
;
1190 offs
+= parts
[0].size
;
1191 if (offs
< mtd
->size
) {
1192 parts
[1].name
= " DiskOnChip Remainder partition";
1193 parts
[1].offset
= offs
;
1194 parts
[1].size
= mtd
->size
- offs
;
1204 /* This is a stripped-down copy of the code in inftlmount.c */
1205 static inline int __init
inftl_partscan(struct mtd_info
*mtd
,
1206 struct mtd_partition
*parts
)
1208 struct nand_chip
*this = mtd
->priv
;
1209 struct doc_priv
*doc
= this->priv
;
1212 struct INFTLMediaHeader
*mh
;
1213 struct INFTLPartition
*ip
;
1216 int vshift
, lastvunit
= 0;
1218 int end
= mtd
->size
;
1220 if (inftl_bbt_write
)
1221 end
-= (INFTL_BBT_RESERVED_BLOCKS
<< this->phys_erase_shift
);
1223 buf
= kmalloc(mtd
->oobblock
, GFP_KERNEL
);
1225 printk(KERN_ERR
"DiskOnChip mediaheader kmalloc failed!\n");
1229 if (!find_media_headers(mtd
, buf
, "BNAND", 0)) goto out
;
1230 doc
->mh1_page
= doc
->mh0_page
+ (4096 >> this->page_shift
);
1231 mh
= (struct INFTLMediaHeader
*) buf
;
1233 mh
->NoOfBootImageBlocks
= le32_to_cpu(mh
->NoOfBootImageBlocks
);
1234 mh
->NoOfBinaryPartitions
= le32_to_cpu(mh
->NoOfBinaryPartitions
);
1235 mh
->NoOfBDTLPartitions
= le32_to_cpu(mh
->NoOfBDTLPartitions
);
1236 mh
->BlockMultiplierBits
= le32_to_cpu(mh
->BlockMultiplierBits
);
1237 mh
->FormatFlags
= le32_to_cpu(mh
->FormatFlags
);
1238 mh
->PercentUsed
= le32_to_cpu(mh
->PercentUsed
);
1240 /*#ifdef CONFIG_MTD_DEBUG_VERBOSE */
1241 /* if (CONFIG_MTD_DEBUG_VERBOSE >= 2) */
1242 printk(KERN_INFO
" bootRecordID = %s\n"
1243 " NoOfBootImageBlocks = %d\n"
1244 " NoOfBinaryPartitions = %d\n"
1245 " NoOfBDTLPartitions = %d\n"
1246 " BlockMultiplerBits = %d\n"
1247 " FormatFlgs = %d\n"
1248 " OsakVersion = %d.%d.%d.%d\n"
1249 " PercentUsed = %d\n",
1250 mh
->bootRecordID
, mh
->NoOfBootImageBlocks
,
1251 mh
->NoOfBinaryPartitions
,
1252 mh
->NoOfBDTLPartitions
,
1253 mh
->BlockMultiplierBits
, mh
->FormatFlags
,
1254 ((unsigned char *) &mh
->OsakVersion
)[0] & 0xf,
1255 ((unsigned char *) &mh
->OsakVersion
)[1] & 0xf,
1256 ((unsigned char *) &mh
->OsakVersion
)[2] & 0xf,
1257 ((unsigned char *) &mh
->OsakVersion
)[3] & 0xf,
1261 vshift
= this->phys_erase_shift
+ mh
->BlockMultiplierBits
;
1263 blocks
= mtd
->size
>> vshift
;
1264 if (blocks
> 32768) {
1265 printk(KERN_ERR
"BlockMultiplierBits=%d is inconsistent with device size. Aborting.\n", mh
->BlockMultiplierBits
);
1269 blocks
= doc
->chips_per_floor
<< (this->chip_shift
- this->phys_erase_shift
);
1270 if (inftl_bbt_write
&& (blocks
> mtd
->erasesize
)) {
1271 printk(KERN_ERR
"Writeable BBTs spanning more than one erase block are not yet supported. FIX ME!\n");
1275 /* Scan the partitions */
1276 for (i
= 0; (i
< 4); i
++) {
1277 ip
= &(mh
->Partitions
[i
]);
1278 ip
->virtualUnits
= le32_to_cpu(ip
->virtualUnits
);
1279 ip
->firstUnit
= le32_to_cpu(ip
->firstUnit
);
1280 ip
->lastUnit
= le32_to_cpu(ip
->lastUnit
);
1281 ip
->flags
= le32_to_cpu(ip
->flags
);
1282 ip
->spareUnits
= le32_to_cpu(ip
->spareUnits
);
1283 ip
->Reserved0
= le32_to_cpu(ip
->Reserved0
);
1285 /*#ifdef CONFIG_MTD_DEBUG_VERBOSE */
1286 /* if (CONFIG_MTD_DEBUG_VERBOSE >= 2) */
1287 printk(KERN_INFO
" PARTITION[%d] ->\n"
1288 " virtualUnits = %d\n"
1292 " spareUnits = %d\n",
1293 i
, ip
->virtualUnits
, ip
->firstUnit
,
1294 ip
->lastUnit
, ip
->flags
,
1299 if ((i == 0) && (ip->firstUnit > 0)) {
1300 parts[0].name = " DiskOnChip IPL / Media Header partition";
1301 parts[0].offset = 0;
1302 parts[0].size = mtd->erasesize * ip->firstUnit;
1307 if (ip
->flags
& INFTL_BINARY
)
1308 parts
[numparts
].name
= " DiskOnChip BDK partition";
1310 parts
[numparts
].name
= " DiskOnChip BDTL partition";
1311 parts
[numparts
].offset
= ip
->firstUnit
<< vshift
;
1312 parts
[numparts
].size
= (1 + ip
->lastUnit
- ip
->firstUnit
) << vshift
;
1314 if (ip
->lastUnit
> lastvunit
) lastvunit
= ip
->lastUnit
;
1315 if (ip
->flags
& INFTL_LAST
) break;
1318 if ((lastvunit
<< vshift
) < end
) {
1319 parts
[numparts
].name
= " DiskOnChip Remainder partition";
1320 parts
[numparts
].offset
= lastvunit
<< vshift
;
1321 parts
[numparts
].size
= end
- parts
[numparts
].offset
;
1330 static int __init
nftl_scan_bbt(struct mtd_info
*mtd
)
1333 struct nand_chip
*this = mtd
->priv
;
1334 struct doc_priv
*doc
= this->priv
;
1335 struct mtd_partition parts
[2];
1337 memset((char *) parts
, 0, sizeof(parts
));
1338 /* On NFTL, we have to find the media headers before we can read the
1339 BBTs, since they're stored in the media header eraseblocks. */
1340 numparts
= nftl_partscan(mtd
, parts
);
1341 if (!numparts
) return -EIO
;
1342 this->bbt_td
->options
= NAND_BBT_ABSPAGE
| NAND_BBT_8BIT
|
1343 NAND_BBT_SAVECONTENT
| NAND_BBT_WRITE
|
1345 this->bbt_td
->veroffs
= 7;
1346 this->bbt_td
->pages
[0] = doc
->mh0_page
+ 1;
1347 if (doc
->mh1_page
!= -1) {
1348 this->bbt_md
->options
= NAND_BBT_ABSPAGE
| NAND_BBT_8BIT
|
1349 NAND_BBT_SAVECONTENT
| NAND_BBT_WRITE
|
1351 this->bbt_md
->veroffs
= 7;
1352 this->bbt_md
->pages
[0] = doc
->mh1_page
+ 1;
1354 this->bbt_md
= NULL
;
1357 /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set.
1358 At least as nand_bbt.c is currently written. */
1359 if ((ret
= nand_scan_bbt(mtd
, NULL
)))
1361 add_mtd_device(mtd
);
1362 #ifdef CONFIG_MTD_PARTITIONS
1364 add_mtd_partitions(mtd
, parts
, numparts
);
1369 static int __init
inftl_scan_bbt(struct mtd_info
*mtd
)
1372 struct nand_chip
*this = mtd
->priv
;
1373 struct doc_priv
*doc
= this->priv
;
1374 struct mtd_partition parts
[5];
1376 if (this->numchips
> doc
->chips_per_floor
) {
1377 printk(KERN_ERR
"Multi-floor INFTL devices not yet supported.\n");
1381 if (DoC_is_MillenniumPlus(doc
)) {
1382 this->bbt_td
->options
= NAND_BBT_2BIT
| NAND_BBT_ABSPAGE
;
1383 if (inftl_bbt_write
)
1384 this->bbt_td
->options
|= NAND_BBT_WRITE
;
1385 this->bbt_td
->pages
[0] = 2;
1386 this->bbt_md
= NULL
;
1388 this->bbt_td
->options
= NAND_BBT_LASTBLOCK
| NAND_BBT_8BIT
|
1390 if (inftl_bbt_write
)
1391 this->bbt_td
->options
|= NAND_BBT_WRITE
;
1392 this->bbt_td
->offs
= 8;
1393 this->bbt_td
->len
= 8;
1394 this->bbt_td
->veroffs
= 7;
1395 this->bbt_td
->maxblocks
= INFTL_BBT_RESERVED_BLOCKS
;
1396 this->bbt_td
->reserved_block_code
= 0x01;
1397 this->bbt_td
->pattern
= "MSYS_BBT";
1399 this->bbt_md
->options
= NAND_BBT_LASTBLOCK
| NAND_BBT_8BIT
|
1401 if (inftl_bbt_write
)
1402 this->bbt_md
->options
|= NAND_BBT_WRITE
;
1403 this->bbt_md
->offs
= 8;
1404 this->bbt_md
->len
= 8;
1405 this->bbt_md
->veroffs
= 7;
1406 this->bbt_md
->maxblocks
= INFTL_BBT_RESERVED_BLOCKS
;
1407 this->bbt_md
->reserved_block_code
= 0x01;
1408 this->bbt_md
->pattern
= "TBB_SYSM";
1411 /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set.
1412 At least as nand_bbt.c is currently written. */
1413 if ((ret
= nand_scan_bbt(mtd
, NULL
)))
1415 memset((char *) parts
, 0, sizeof(parts
));
1416 numparts
= inftl_partscan(mtd
, parts
);
1417 /* At least for now, require the INFTL Media Header. We could probably
1418 do without it for non-INFTL use, since all it gives us is
1419 autopartitioning, but I want to give it more thought. */
1420 if (!numparts
) return -EIO
;
1421 add_mtd_device(mtd
);
1422 #ifdef CONFIG_MTD_PARTITIONS
1424 add_mtd_partitions(mtd
, parts
, numparts
);
1429 static inline int __init
doc2000_init(struct mtd_info
*mtd
)
1431 struct nand_chip
*this = mtd
->priv
;
1432 struct doc_priv
*doc
= this->priv
;
1434 this->write_byte
= doc2000_write_byte
;
1435 this->read_byte
= doc2000_read_byte
;
1436 this->write_buf
= doc2000_writebuf
;
1437 this->read_buf
= doc2000_readbuf
;
1438 this->verify_buf
= doc2000_verifybuf
;
1439 this->scan_bbt
= nftl_scan_bbt
;
1441 doc
->CDSNControl
= CDSN_CTRL_FLASH_IO
| CDSN_CTRL_ECC_IO
;
1442 doc2000_count_chips(mtd
);
1443 mtd
->name
= "DiskOnChip 2000 (NFTL Model)";
1444 return (4 * doc
->chips_per_floor
);
1447 static inline int __init
doc2001_init(struct mtd_info
*mtd
)
1449 struct nand_chip
*this = mtd
->priv
;
1450 struct doc_priv
*doc
= this->priv
;
1452 this->write_byte
= doc2001_write_byte
;
1453 this->read_byte
= doc2001_read_byte
;
1454 this->write_buf
= doc2001_writebuf
;
1455 this->read_buf
= doc2001_readbuf
;
1456 this->verify_buf
= doc2001_verifybuf
;
1458 ReadDOC(doc
->virtadr
, ChipID
);
1459 ReadDOC(doc
->virtadr
, ChipID
);
1460 ReadDOC(doc
->virtadr
, ChipID
);
1461 if (ReadDOC(doc
->virtadr
, ChipID
) != DOC_ChipID_DocMil
) {
1462 /* It's not a Millennium; it's one of the newer
1463 DiskOnChip 2000 units with a similar ASIC.
1464 Treat it like a Millennium, except that it
1465 can have multiple chips. */
1466 doc2000_count_chips(mtd
);
1467 mtd
->name
= "DiskOnChip 2000 (INFTL Model)";
1468 this->scan_bbt
= inftl_scan_bbt
;
1469 return (4 * doc
->chips_per_floor
);
1471 /* Bog-standard Millennium */
1472 doc
->chips_per_floor
= 1;
1473 mtd
->name
= "DiskOnChip Millennium";
1474 this->scan_bbt
= nftl_scan_bbt
;
1479 static inline int __init
doc2001plus_init(struct mtd_info
*mtd
)
1481 struct nand_chip
*this = mtd
->priv
;
1482 struct doc_priv
*doc
= this->priv
;
1484 this->write_byte
= NULL
;
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->hwcontrol
= NULL
;
1491 this->select_chip
= doc2001plus_select_chip
;
1492 this->cmdfunc
= doc2001plus_command
;
1493 this->enable_hwecc
= doc2001plus_enable_hwecc
;
1495 doc
->chips_per_floor
= 1;
1496 mtd
->name
= "DiskOnChip Millennium Plus";
1501 static inline 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
,
1531 virtadr
, DOCControl
);
1532 WriteDOC(DOC_MODE_CLR_ERR
| DOC_MODE_MDWREN
| DOC_MODE_RESET
,
1533 virtadr
, DOCControl
);
1535 /* Enable the DiskOnChip ASIC */
1536 WriteDOC(DOC_MODE_CLR_ERR
| DOC_MODE_MDWREN
| DOC_MODE_NORMAL
,
1537 virtadr
, DOCControl
);
1538 WriteDOC(DOC_MODE_CLR_ERR
| DOC_MODE_MDWREN
| DOC_MODE_NORMAL
,
1539 virtadr
, DOCControl
);
1541 ChipID
= ReadDOC(virtadr
, ChipID
);
1544 case DOC_ChipID_Doc2k
:
1545 reg
= DoC_2k_ECCStatus
;
1547 case DOC_ChipID_DocMil
:
1550 case DOC_ChipID_DocMilPlus16
:
1551 case DOC_ChipID_DocMilPlus32
:
1553 /* Possible Millennium Plus, need to do more checks */
1554 /* Possibly release from power down mode */
1555 for (tmp
= 0; (tmp
< 4); tmp
++)
1556 ReadDOC(virtadr
, Mplus_Power
);
1558 /* Reset the Millennium Plus ASIC */
1559 tmp
= DOC_MODE_RESET
| DOC_MODE_MDWREN
| DOC_MODE_RST_LAT
|
1561 WriteDOC(tmp
, virtadr
, Mplus_DOCControl
);
1562 WriteDOC(~tmp
, virtadr
, Mplus_CtrlConfirm
);
1565 /* Enable the Millennium Plus ASIC */
1566 tmp
= DOC_MODE_NORMAL
| DOC_MODE_MDWREN
| DOC_MODE_RST_LAT
|
1568 WriteDOC(tmp
, virtadr
, Mplus_DOCControl
);
1569 WriteDOC(~tmp
, virtadr
, Mplus_CtrlConfirm
);
1572 ChipID
= ReadDOC(virtadr
, ChipID
);
1575 case DOC_ChipID_DocMilPlus16
:
1576 reg
= DoC_Mplus_Toggle
;
1578 case DOC_ChipID_DocMilPlus32
:
1579 printk(KERN_ERR
"DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n");
1590 /* Check the TOGGLE bit in the ECC register */
1591 tmp
= ReadDOC_(virtadr
, reg
) & DOC_TOGGLE_BIT
;
1592 tmpb
= ReadDOC_(virtadr
, reg
) & DOC_TOGGLE_BIT
;
1593 tmpc
= ReadDOC_(virtadr
, reg
) & DOC_TOGGLE_BIT
;
1594 if ((tmp
== tmpb
) || (tmp
!= tmpc
)) {
1595 printk(KERN_WARNING
"Possible DiskOnChip at 0x%lx failed TOGGLE test, dropping.\n", physadr
);
1600 for (mtd
= doclist
; mtd
; mtd
= doc
->nextdoc
) {
1601 unsigned char oldval
;
1602 unsigned char newval
;
1605 /* Use the alias resolution register to determine if this is
1606 in fact the same DOC aliased to a new address. If writes
1607 to one chip's alias resolution register change the value on
1608 the other chip, they're the same chip. */
1609 if (ChipID
== DOC_ChipID_DocMilPlus16
) {
1610 oldval
= ReadDOC(doc
->virtadr
, Mplus_AliasResolution
);
1611 newval
= ReadDOC(virtadr
, Mplus_AliasResolution
);
1613 oldval
= ReadDOC(doc
->virtadr
, AliasResolution
);
1614 newval
= ReadDOC(virtadr
, AliasResolution
);
1616 if (oldval
!= newval
)
1618 if (ChipID
== DOC_ChipID_DocMilPlus16
) {
1619 WriteDOC(~newval
, virtadr
, Mplus_AliasResolution
);
1620 oldval
= ReadDOC(doc
->virtadr
, Mplus_AliasResolution
);
1621 WriteDOC(newval
, virtadr
, Mplus_AliasResolution
); /* restore it */
1623 WriteDOC(~newval
, virtadr
, AliasResolution
);
1624 oldval
= ReadDOC(doc
->virtadr
, AliasResolution
);
1625 WriteDOC(newval
, virtadr
, AliasResolution
); /* restore it */
1628 if (oldval
== newval
) {
1629 printk(KERN_DEBUG
"Found alias of DOC at 0x%lx to 0x%lx\n", doc
->physadr
, physadr
);
1634 printk(KERN_NOTICE
"DiskOnChip found at 0x%lx\n", physadr
);
1636 len
= sizeof(struct mtd_info
) +
1637 sizeof(struct nand_chip
) +
1638 sizeof(struct doc_priv
) +
1639 (2 * sizeof(struct nand_bbt_descr
));
1640 mtd
= kmalloc(len
, GFP_KERNEL
);
1642 printk(KERN_ERR
"DiskOnChip kmalloc (%d bytes) failed!\n", len
);
1646 memset(mtd
, 0, len
);
1648 nand
= (struct nand_chip
*) (mtd
+ 1);
1649 doc
= (struct doc_priv
*) (nand
+ 1);
1650 nand
->bbt_td
= (struct nand_bbt_descr
*) (doc
+ 1);
1651 nand
->bbt_md
= nand
->bbt_td
+ 1;
1654 mtd
->owner
= THIS_MODULE
;
1657 nand
->select_chip
= doc200x_select_chip
;
1658 nand
->hwcontrol
= doc200x_hwcontrol
;
1659 nand
->dev_ready
= doc200x_dev_ready
;
1660 nand
->waitfunc
= doc200x_wait
;
1661 nand
->block_bad
= doc200x_block_bad
;
1662 nand
->enable_hwecc
= doc200x_enable_hwecc
;
1663 nand
->calculate_ecc
= doc200x_calculate_ecc
;
1664 nand
->correct_data
= doc200x_correct_data
;
1666 nand
->autooob
= &doc200x_oobinfo
;
1667 nand
->eccmode
= NAND_ECC_HW6_512
;
1668 nand
->options
= NAND_USE_FLASH_BBT
| NAND_HWECC_SYNDROME
;
1670 doc
->physadr
= physadr
;
1671 doc
->virtadr
= virtadr
;
1672 doc
->ChipID
= ChipID
;
1677 doc
->nextdoc
= doclist
;
1679 if (ChipID
== DOC_ChipID_Doc2k
)
1680 numchips
= doc2000_init(mtd
);
1681 else if (ChipID
== DOC_ChipID_DocMilPlus16
)
1682 numchips
= doc2001plus_init(mtd
);
1684 numchips
= doc2001_init(mtd
);
1686 if ((ret
= nand_scan(mtd
, numchips
))) {
1687 /* DBB note: i believe nand_release is necessary here, as
1688 buffers may have been allocated in nand_base. Check with
1690 /* nand_release will call del_mtd_device, but we haven't yet
1691 added it. This is handled without incident by
1692 del_mtd_device, as far as I can tell. */
1703 /* Put back the contents of the DOCControl register, in case it's not
1704 actually a DiskOnChip. */
1705 WriteDOC(save_control
, virtadr
, DOCControl
);
1711 static void release_nanddoc(void)
1713 struct mtd_info
*mtd
, *nextmtd
;
1714 struct nand_chip
*nand
;
1715 struct doc_priv
*doc
;
1717 for (mtd
= doclist
; mtd
; mtd
= nextmtd
) {
1721 nextmtd
= doc
->nextdoc
;
1723 iounmap(doc
->virtadr
);
1728 static int __init
init_nanddoc(void)
1732 /* We could create the decoder on demand, if memory is a concern.
1733 * This way we have it handy, if an error happens
1735 * Symbolsize is 10 (bits)
1736 * Primitve polynomial is x^10+x^3+1
1737 * first consecutive root is 510
1738 * primitve element to generate roots = 1
1739 * generator polinomial degree = 4
1741 rs_decoder
= init_rs(10, 0x409, FCR
, 1, NROOTS
);
1743 printk (KERN_ERR
"DiskOnChip: Could not create a RS decoder\n");
1747 if (doc_config_location
) {
1748 printk(KERN_INFO
"Using configured DiskOnChip probe address 0x%lx\n", doc_config_location
);
1749 ret
= doc_probe(doc_config_location
);
1753 for (i
=0; (doc_locations
[i
] != 0xffffffff); i
++) {
1754 doc_probe(doc_locations
[i
]);
1757 /* No banner message any more. Print a message if no DiskOnChip
1758 found, so the user knows we at least tried. */
1760 printk(KERN_INFO
"No valid DiskOnChip devices found\n");
1766 free_rs(rs_decoder
);
1770 static void __exit
cleanup_nanddoc(void)
1772 /* Cleanup the nand/DoC resources */
1775 /* Free the reed solomon resources */
1777 free_rs(rs_decoder
);
1781 module_init(init_nanddoc
);
1782 module_exit(cleanup_nanddoc
);
1784 MODULE_LICENSE("GPL");
1785 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
1786 MODULE_DESCRIPTION("M-Systems DiskOnChip 2000, Millennium and Millennium Plus device driver\n");