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
20 #include <linux/kernel.h>
21 #include <linux/init.h>
22 #include <linux/sched.h>
23 #include <linux/delay.h>
24 #include <linux/rslib.h>
25 #include <linux/moduleparam.h>
26 #include <linux/slab.h>
29 #include <linux/mtd/mtd.h>
30 #include <linux/mtd/nand.h>
31 #include <linux/mtd/doc2000.h>
32 #include <linux/mtd/partitions.h>
33 #include <linux/mtd/inftl.h>
35 /* Where to look for the devices? */
36 #ifndef CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS
37 #define CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS 0
40 static unsigned long __initdata doc_locations
[] = {
41 #if defined(__alpha__) || defined(__i386__) || defined(__x86_64__)
42 #ifdef CONFIG_MTD_NAND_DISKONCHIP_PROBE_HIGH
43 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000,
44 0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000,
45 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000,
46 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000,
47 0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000,
48 #else /* CONFIG_MTD_DOCPROBE_HIGH */
49 0xc8000, 0xca000, 0xcc000, 0xce000,
50 0xd0000, 0xd2000, 0xd4000, 0xd6000,
51 0xd8000, 0xda000, 0xdc000, 0xde000,
52 0xe0000, 0xe2000, 0xe4000, 0xe6000,
53 0xe8000, 0xea000, 0xec000, 0xee000,
54 #endif /* CONFIG_MTD_DOCPROBE_HIGH */
56 #warning Unknown architecture for DiskOnChip. No default probe locations defined
60 static struct mtd_info
*doclist
= NULL
;
63 void __iomem
*virtadr
;
64 unsigned long physadr
;
67 int chips_per_floor
; /* The number of chips detected on each floor */
72 struct mtd_info
*nextdoc
;
75 /* This is the syndrome computed by the HW ecc generator upon reading an empty
76 page, one with all 0xff for data and stored ecc code. */
77 static u_char empty_read_syndrome
[6] = { 0x26, 0xff, 0x6d, 0x47, 0x73, 0x7a };
79 /* This is the ecc value computed by the HW ecc generator upon writing an empty
80 page, one with all 0xff for data. */
81 static u_char empty_write_ecc
[6] = { 0x4b, 0x00, 0xe2, 0x0e, 0x93, 0xf7 };
83 #define INFTL_BBT_RESERVED_BLOCKS 4
85 #define DoC_is_MillenniumPlus(doc) ((doc)->ChipID == DOC_ChipID_DocMilPlus16 || (doc)->ChipID == DOC_ChipID_DocMilPlus32)
86 #define DoC_is_Millennium(doc) ((doc)->ChipID == DOC_ChipID_DocMil)
87 #define DoC_is_2000(doc) ((doc)->ChipID == DOC_ChipID_Doc2k)
89 static void doc200x_hwcontrol(struct mtd_info
*mtd
, int cmd
,
90 unsigned int bitmask
);
91 static void doc200x_select_chip(struct mtd_info
*mtd
, int chip
);
94 module_param(debug
, int, 0);
96 static int try_dword
= 1;
97 module_param(try_dword
, int, 0);
99 static int no_ecc_failures
= 0;
100 module_param(no_ecc_failures
, int, 0);
102 static int no_autopart
= 0;
103 module_param(no_autopart
, int, 0);
105 static int show_firmware_partition
= 0;
106 module_param(show_firmware_partition
, int, 0);
108 #ifdef CONFIG_MTD_NAND_DISKONCHIP_BBTWRITE
109 static int inftl_bbt_write
= 1;
111 static int inftl_bbt_write
= 0;
113 module_param(inftl_bbt_write
, int, 0);
115 static unsigned long doc_config_location
= CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS
;
116 module_param(doc_config_location
, ulong
, 0);
117 MODULE_PARM_DESC(doc_config_location
, "Physical memory address at which to probe for DiskOnChip");
119 /* Sector size for HW ECC */
120 #define SECTOR_SIZE 512
121 /* The sector bytes are packed into NB_DATA 10 bit words */
122 #define NB_DATA (((SECTOR_SIZE + 1) * 8 + 6) / 10)
123 /* Number of roots */
125 /* First consective root */
127 /* Number of symbols */
130 /* the Reed Solomon control structure */
131 static struct rs_control
*rs_decoder
;
134 * The HW decoder in the DoC ASIC's provides us a error syndrome,
135 * which we must convert to a standard syndrom usable by the generic
136 * Reed-Solomon library code.
138 * Fabrice Bellard figured this out in the old docecc code. I added
139 * some comments, improved a minor bit and converted it to make use
140 * of the generic Reed-Solomon libary. tglx
142 static int doc_ecc_decode(struct rs_control
*rs
, uint8_t *data
, uint8_t *ecc
)
144 int i
, j
, nerr
, errpos
[8];
146 uint16_t ds
[4], s
[5], tmp
, errval
[8], syn
[4];
148 memset(syn
, 0, sizeof(syn
));
149 /* Convert the ecc bytes into words */
150 ds
[0] = ((ecc
[4] & 0xff) >> 0) | ((ecc
[5] & 0x03) << 8);
151 ds
[1] = ((ecc
[5] & 0xfc) >> 2) | ((ecc
[2] & 0x0f) << 6);
152 ds
[2] = ((ecc
[2] & 0xf0) >> 4) | ((ecc
[3] & 0x3f) << 4);
153 ds
[3] = ((ecc
[3] & 0xc0) >> 6) | ((ecc
[0] & 0xff) << 2);
156 /* Initialize the syndrom buffer */
157 for (i
= 0; i
< NROOTS
; i
++)
161 * s[i] = ds[3]x^3 + ds[2]x^2 + ds[1]x^1 + ds[0]
162 * where x = alpha^(FCR + i)
164 for (j
= 1; j
< NROOTS
; j
++) {
167 tmp
= rs
->index_of
[ds
[j
]];
168 for (i
= 0; i
< NROOTS
; i
++)
169 s
[i
] ^= rs
->alpha_to
[rs_modnn(rs
, tmp
+ (FCR
+ i
) * j
)];
172 /* Calc syn[i] = s[i] / alpha^(v + i) */
173 for (i
= 0; i
< NROOTS
; i
++) {
175 syn
[i
] = rs_modnn(rs
, rs
->index_of
[s
[i
]] + (NN
- FCR
- i
));
177 /* Call the decoder library */
178 nerr
= decode_rs16(rs
, NULL
, NULL
, 1019, syn
, 0, errpos
, 0, errval
);
180 /* Incorrectable errors ? */
185 * Correct the errors. The bitpositions are a bit of magic,
186 * but they are given by the design of the de/encoder circuit
189 for (i
= 0; i
< nerr
; i
++) {
190 int index
, bitpos
, pos
= 1015 - errpos
[i
];
192 if (pos
>= NB_DATA
&& pos
< 1019)
195 /* extract bit position (MSB first) */
196 pos
= 10 * (NB_DATA
- 1 - pos
) - 6;
197 /* now correct the following 10 bits. At most two bytes
198 can be modified since pos is even */
199 index
= (pos
>> 3) ^ 1;
201 if ((index
>= 0 && index
< SECTOR_SIZE
) || index
== (SECTOR_SIZE
+ 1)) {
202 val
= (uint8_t) (errval
[i
] >> (2 + bitpos
));
204 if (index
< SECTOR_SIZE
)
207 index
= ((pos
>> 3) + 1) ^ 1;
208 bitpos
= (bitpos
+ 10) & 7;
211 if ((index
>= 0 && index
< SECTOR_SIZE
) || index
== (SECTOR_SIZE
+ 1)) {
212 val
= (uint8_t) (errval
[i
] << (8 - bitpos
));
214 if (index
< SECTOR_SIZE
)
219 /* If the parity is wrong, no rescue possible */
220 return parity
? -EBADMSG
: nerr
;
223 static void DoC_Delay(struct doc_priv
*doc
, unsigned short cycles
)
228 for (i
= 0; i
< cycles
; i
++) {
229 if (DoC_is_Millennium(doc
))
230 dummy
= ReadDOC(doc
->virtadr
, NOP
);
231 else if (DoC_is_MillenniumPlus(doc
))
232 dummy
= ReadDOC(doc
->virtadr
, Mplus_NOP
);
234 dummy
= ReadDOC(doc
->virtadr
, DOCStatus
);
239 #define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1)
241 /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */
242 static int _DoC_WaitReady(struct doc_priv
*doc
)
244 void __iomem
*docptr
= doc
->virtadr
;
245 unsigned long timeo
= jiffies
+ (HZ
* 10);
248 printk("_DoC_WaitReady...\n");
249 /* Out-of-line routine to wait for chip response */
250 if (DoC_is_MillenniumPlus(doc
)) {
251 while ((ReadDOC(docptr
, Mplus_FlashControl
) & CDSN_CTRL_FR_B_MASK
) != CDSN_CTRL_FR_B_MASK
) {
252 if (time_after(jiffies
, timeo
)) {
253 printk("_DoC_WaitReady timed out.\n");
260 while (!(ReadDOC(docptr
, CDSNControl
) & CDSN_CTRL_FR_B
)) {
261 if (time_after(jiffies
, timeo
)) {
262 printk("_DoC_WaitReady timed out.\n");
273 static inline int DoC_WaitReady(struct doc_priv
*doc
)
275 void __iomem
*docptr
= doc
->virtadr
;
278 if (DoC_is_MillenniumPlus(doc
)) {
281 if ((ReadDOC(docptr
, Mplus_FlashControl
) & CDSN_CTRL_FR_B_MASK
) != CDSN_CTRL_FR_B_MASK
)
282 /* Call the out-of-line routine to wait */
283 ret
= _DoC_WaitReady(doc
);
287 if (!(ReadDOC(docptr
, CDSNControl
) & CDSN_CTRL_FR_B
))
288 /* Call the out-of-line routine to wait */
289 ret
= _DoC_WaitReady(doc
);
294 printk("DoC_WaitReady OK\n");
298 static void doc2000_write_byte(struct mtd_info
*mtd
, u_char datum
)
300 struct nand_chip
*this = mtd
->priv
;
301 struct doc_priv
*doc
= this->priv
;
302 void __iomem
*docptr
= doc
->virtadr
;
305 printk("write_byte %02x\n", datum
);
306 WriteDOC(datum
, docptr
, CDSNSlowIO
);
307 WriteDOC(datum
, docptr
, 2k_CDSN_IO
);
310 static u_char
doc2000_read_byte(struct mtd_info
*mtd
)
312 struct nand_chip
*this = mtd
->priv
;
313 struct doc_priv
*doc
= this->priv
;
314 void __iomem
*docptr
= doc
->virtadr
;
317 ReadDOC(docptr
, CDSNSlowIO
);
319 ret
= ReadDOC(docptr
, 2k_CDSN_IO
);
321 printk("read_byte returns %02x\n", ret
);
325 static void doc2000_writebuf(struct mtd_info
*mtd
, const u_char
*buf
, int len
)
327 struct nand_chip
*this = mtd
->priv
;
328 struct doc_priv
*doc
= this->priv
;
329 void __iomem
*docptr
= doc
->virtadr
;
332 printk("writebuf of %d bytes: ", len
);
333 for (i
= 0; i
< len
; i
++) {
334 WriteDOC_(buf
[i
], docptr
, DoC_2k_CDSN_IO
+ i
);
336 printk("%02x ", buf
[i
]);
342 static void doc2000_readbuf(struct mtd_info
*mtd
, u_char
*buf
, int len
)
344 struct nand_chip
*this = mtd
->priv
;
345 struct doc_priv
*doc
= this->priv
;
346 void __iomem
*docptr
= doc
->virtadr
;
350 printk("readbuf of %d bytes: ", len
);
352 for (i
= 0; i
< len
; i
++) {
353 buf
[i
] = ReadDOC(docptr
, 2k_CDSN_IO
+ i
);
357 static void doc2000_readbuf_dword(struct mtd_info
*mtd
, u_char
*buf
, int len
)
359 struct nand_chip
*this = mtd
->priv
;
360 struct doc_priv
*doc
= this->priv
;
361 void __iomem
*docptr
= doc
->virtadr
;
365 printk("readbuf_dword of %d bytes: ", len
);
367 if (unlikely((((unsigned long)buf
) | len
) & 3)) {
368 for (i
= 0; i
< len
; i
++) {
369 *(uint8_t *) (&buf
[i
]) = ReadDOC(docptr
, 2k_CDSN_IO
+ i
);
372 for (i
= 0; i
< len
; i
+= 4) {
373 *(uint32_t *) (&buf
[i
]) = readl(docptr
+ DoC_2k_CDSN_IO
+ i
);
378 static int doc2000_verifybuf(struct mtd_info
*mtd
, const u_char
*buf
, int len
)
380 struct nand_chip
*this = mtd
->priv
;
381 struct doc_priv
*doc
= this->priv
;
382 void __iomem
*docptr
= doc
->virtadr
;
385 for (i
= 0; i
< len
; i
++)
386 if (buf
[i
] != ReadDOC(docptr
, 2k_CDSN_IO
))
391 static uint16_t __init
doc200x_ident_chip(struct mtd_info
*mtd
, int nr
)
393 struct nand_chip
*this = mtd
->priv
;
394 struct doc_priv
*doc
= this->priv
;
397 doc200x_select_chip(mtd
, nr
);
398 doc200x_hwcontrol(mtd
, NAND_CMD_READID
,
399 NAND_CTRL_CLE
| NAND_CTRL_CHANGE
);
400 doc200x_hwcontrol(mtd
, 0, NAND_CTRL_ALE
| NAND_CTRL_CHANGE
);
401 doc200x_hwcontrol(mtd
, NAND_CMD_NONE
, NAND_NCE
| NAND_CTRL_CHANGE
);
403 /* We cant' use dev_ready here, but at least we wait for the
404 * command to complete
408 ret
= this->read_byte(mtd
) << 8;
409 ret
|= this->read_byte(mtd
);
411 if (doc
->ChipID
== DOC_ChipID_Doc2k
&& try_dword
&& !nr
) {
412 /* First chip probe. See if we get same results by 32-bit access */
417 void __iomem
*docptr
= doc
->virtadr
;
419 doc200x_hwcontrol(mtd
, NAND_CMD_READID
,
420 NAND_CTRL_CLE
| NAND_CTRL_CHANGE
);
421 doc200x_hwcontrol(mtd
, 0, NAND_CTRL_ALE
| NAND_CTRL_CHANGE
);
422 doc200x_hwcontrol(mtd
, NAND_CMD_NONE
,
423 NAND_NCE
| NAND_CTRL_CHANGE
);
427 ident
.dword
= readl(docptr
+ DoC_2k_CDSN_IO
);
428 if (((ident
.byte
[0] << 8) | ident
.byte
[1]) == ret
) {
429 printk(KERN_INFO
"DiskOnChip 2000 responds to DWORD access\n");
430 this->read_buf
= &doc2000_readbuf_dword
;
437 static void __init
doc2000_count_chips(struct mtd_info
*mtd
)
439 struct nand_chip
*this = mtd
->priv
;
440 struct doc_priv
*doc
= this->priv
;
444 /* Max 4 chips per floor on DiskOnChip 2000 */
445 doc
->chips_per_floor
= 4;
447 /* Find out what the first chip is */
448 mfrid
= doc200x_ident_chip(mtd
, 0);
450 /* Find how many chips in each floor. */
451 for (i
= 1; i
< 4; i
++) {
452 if (doc200x_ident_chip(mtd
, i
) != mfrid
)
455 doc
->chips_per_floor
= i
;
456 printk(KERN_DEBUG
"Detected %d chips per floor.\n", i
);
459 static int doc200x_wait(struct mtd_info
*mtd
, struct nand_chip
*this)
461 struct doc_priv
*doc
= this->priv
;
466 this->cmdfunc(mtd
, NAND_CMD_STATUS
, -1, -1);
468 status
= (int)this->read_byte(mtd
);
473 static void doc2001_write_byte(struct mtd_info
*mtd
, u_char datum
)
475 struct nand_chip
*this = mtd
->priv
;
476 struct doc_priv
*doc
= this->priv
;
477 void __iomem
*docptr
= doc
->virtadr
;
479 WriteDOC(datum
, docptr
, CDSNSlowIO
);
480 WriteDOC(datum
, docptr
, Mil_CDSN_IO
);
481 WriteDOC(datum
, docptr
, WritePipeTerm
);
484 static u_char
doc2001_read_byte(struct mtd_info
*mtd
)
486 struct nand_chip
*this = mtd
->priv
;
487 struct doc_priv
*doc
= this->priv
;
488 void __iomem
*docptr
= doc
->virtadr
;
490 //ReadDOC(docptr, CDSNSlowIO);
491 /* 11.4.5 -- delay twice to allow extended length cycle */
493 ReadDOC(docptr
, ReadPipeInit
);
494 //return ReadDOC(docptr, Mil_CDSN_IO);
495 return ReadDOC(docptr
, LastDataRead
);
498 static void doc2001_writebuf(struct mtd_info
*mtd
, const u_char
*buf
, int len
)
500 struct nand_chip
*this = mtd
->priv
;
501 struct doc_priv
*doc
= this->priv
;
502 void __iomem
*docptr
= doc
->virtadr
;
505 for (i
= 0; i
< len
; i
++)
506 WriteDOC_(buf
[i
], docptr
, DoC_Mil_CDSN_IO
+ i
);
507 /* Terminate write pipeline */
508 WriteDOC(0x00, docptr
, WritePipeTerm
);
511 static void doc2001_readbuf(struct mtd_info
*mtd
, u_char
*buf
, int len
)
513 struct nand_chip
*this = mtd
->priv
;
514 struct doc_priv
*doc
= this->priv
;
515 void __iomem
*docptr
= doc
->virtadr
;
518 /* Start read pipeline */
519 ReadDOC(docptr
, ReadPipeInit
);
521 for (i
= 0; i
< len
- 1; i
++)
522 buf
[i
] = ReadDOC(docptr
, Mil_CDSN_IO
+ (i
& 0xff));
524 /* Terminate read pipeline */
525 buf
[i
] = ReadDOC(docptr
, LastDataRead
);
528 static int doc2001_verifybuf(struct mtd_info
*mtd
, const u_char
*buf
, int len
)
530 struct nand_chip
*this = mtd
->priv
;
531 struct doc_priv
*doc
= this->priv
;
532 void __iomem
*docptr
= doc
->virtadr
;
535 /* Start read pipeline */
536 ReadDOC(docptr
, ReadPipeInit
);
538 for (i
= 0; i
< len
- 1; i
++)
539 if (buf
[i
] != ReadDOC(docptr
, Mil_CDSN_IO
)) {
540 ReadDOC(docptr
, LastDataRead
);
543 if (buf
[i
] != ReadDOC(docptr
, LastDataRead
))
548 static u_char
doc2001plus_read_byte(struct mtd_info
*mtd
)
550 struct nand_chip
*this = mtd
->priv
;
551 struct doc_priv
*doc
= this->priv
;
552 void __iomem
*docptr
= doc
->virtadr
;
555 ReadDOC(docptr
, Mplus_ReadPipeInit
);
556 ReadDOC(docptr
, Mplus_ReadPipeInit
);
557 ret
= ReadDOC(docptr
, Mplus_LastDataRead
);
559 printk("read_byte returns %02x\n", ret
);
563 static void doc2001plus_writebuf(struct mtd_info
*mtd
, const u_char
*buf
, int len
)
565 struct nand_chip
*this = mtd
->priv
;
566 struct doc_priv
*doc
= this->priv
;
567 void __iomem
*docptr
= doc
->virtadr
;
571 printk("writebuf of %d bytes: ", len
);
572 for (i
= 0; i
< len
; i
++) {
573 WriteDOC_(buf
[i
], docptr
, DoC_Mil_CDSN_IO
+ i
);
575 printk("%02x ", buf
[i
]);
581 static void doc2001plus_readbuf(struct mtd_info
*mtd
, u_char
*buf
, int len
)
583 struct nand_chip
*this = mtd
->priv
;
584 struct doc_priv
*doc
= this->priv
;
585 void __iomem
*docptr
= doc
->virtadr
;
589 printk("readbuf of %d bytes: ", len
);
591 /* Start read pipeline */
592 ReadDOC(docptr
, Mplus_ReadPipeInit
);
593 ReadDOC(docptr
, Mplus_ReadPipeInit
);
595 for (i
= 0; i
< len
- 2; i
++) {
596 buf
[i
] = ReadDOC(docptr
, Mil_CDSN_IO
);
598 printk("%02x ", buf
[i
]);
601 /* Terminate read pipeline */
602 buf
[len
- 2] = ReadDOC(docptr
, Mplus_LastDataRead
);
604 printk("%02x ", buf
[len
- 2]);
605 buf
[len
- 1] = ReadDOC(docptr
, Mplus_LastDataRead
);
607 printk("%02x ", buf
[len
- 1]);
612 static int doc2001plus_verifybuf(struct mtd_info
*mtd
, const u_char
*buf
, int len
)
614 struct nand_chip
*this = mtd
->priv
;
615 struct doc_priv
*doc
= this->priv
;
616 void __iomem
*docptr
= doc
->virtadr
;
620 printk("verifybuf of %d bytes: ", len
);
622 /* Start read pipeline */
623 ReadDOC(docptr
, Mplus_ReadPipeInit
);
624 ReadDOC(docptr
, Mplus_ReadPipeInit
);
626 for (i
= 0; i
< len
- 2; i
++)
627 if (buf
[i
] != ReadDOC(docptr
, Mil_CDSN_IO
)) {
628 ReadDOC(docptr
, Mplus_LastDataRead
);
629 ReadDOC(docptr
, Mplus_LastDataRead
);
632 if (buf
[len
- 2] != ReadDOC(docptr
, Mplus_LastDataRead
))
634 if (buf
[len
- 1] != ReadDOC(docptr
, Mplus_LastDataRead
))
639 static void doc2001plus_select_chip(struct mtd_info
*mtd
, int chip
)
641 struct nand_chip
*this = mtd
->priv
;
642 struct doc_priv
*doc
= this->priv
;
643 void __iomem
*docptr
= doc
->virtadr
;
647 printk("select chip (%d)\n", chip
);
650 /* Disable flash internally */
651 WriteDOC(0, docptr
, Mplus_FlashSelect
);
655 floor
= chip
/ doc
->chips_per_floor
;
656 chip
-= (floor
* doc
->chips_per_floor
);
658 /* Assert ChipEnable and deassert WriteProtect */
659 WriteDOC((DOC_FLASH_CE
), docptr
, Mplus_FlashSelect
);
660 this->cmdfunc(mtd
, NAND_CMD_RESET
, -1, -1);
663 doc
->curfloor
= floor
;
666 static void doc200x_select_chip(struct mtd_info
*mtd
, int chip
)
668 struct nand_chip
*this = mtd
->priv
;
669 struct doc_priv
*doc
= this->priv
;
670 void __iomem
*docptr
= doc
->virtadr
;
674 printk("select chip (%d)\n", chip
);
679 floor
= chip
/ doc
->chips_per_floor
;
680 chip
-= (floor
* doc
->chips_per_floor
);
682 /* 11.4.4 -- deassert CE before changing chip */
683 doc200x_hwcontrol(mtd
, NAND_CMD_NONE
, 0 | NAND_CTRL_CHANGE
);
685 WriteDOC(floor
, docptr
, FloorSelect
);
686 WriteDOC(chip
, docptr
, CDSNDeviceSelect
);
688 doc200x_hwcontrol(mtd
, NAND_CMD_NONE
, NAND_NCE
| NAND_CTRL_CHANGE
);
691 doc
->curfloor
= floor
;
694 #define CDSN_CTRL_MSK (CDSN_CTRL_CE | CDSN_CTRL_CLE | CDSN_CTRL_ALE)
696 static void doc200x_hwcontrol(struct mtd_info
*mtd
, int cmd
,
699 struct nand_chip
*this = mtd
->priv
;
700 struct doc_priv
*doc
= this->priv
;
701 void __iomem
*docptr
= doc
->virtadr
;
703 if (ctrl
& NAND_CTRL_CHANGE
) {
704 doc
->CDSNControl
&= ~CDSN_CTRL_MSK
;
705 doc
->CDSNControl
|= ctrl
& CDSN_CTRL_MSK
;
707 printk("hwcontrol(%d): %02x\n", cmd
, doc
->CDSNControl
);
708 WriteDOC(doc
->CDSNControl
, docptr
, CDSNControl
);
709 /* 11.4.3 -- 4 NOPs after CSDNControl write */
712 if (cmd
!= NAND_CMD_NONE
) {
713 if (DoC_is_2000(doc
))
714 doc2000_write_byte(mtd
, cmd
);
716 doc2001_write_byte(mtd
, cmd
);
720 static void doc2001plus_command(struct mtd_info
*mtd
, unsigned command
, int column
, int page_addr
)
722 struct nand_chip
*this = mtd
->priv
;
723 struct doc_priv
*doc
= this->priv
;
724 void __iomem
*docptr
= doc
->virtadr
;
727 * Must terminate write pipeline before sending any commands
730 if (command
== NAND_CMD_PAGEPROG
) {
731 WriteDOC(0x00, docptr
, Mplus_WritePipeTerm
);
732 WriteDOC(0x00, docptr
, Mplus_WritePipeTerm
);
736 * Write out the command to the device.
738 if (command
== NAND_CMD_SEQIN
) {
741 if (column
>= mtd
->writesize
) {
743 column
-= mtd
->writesize
;
744 readcmd
= NAND_CMD_READOOB
;
745 } else if (column
< 256) {
746 /* First 256 bytes --> READ0 */
747 readcmd
= NAND_CMD_READ0
;
750 readcmd
= NAND_CMD_READ1
;
752 WriteDOC(readcmd
, docptr
, Mplus_FlashCmd
);
754 WriteDOC(command
, docptr
, Mplus_FlashCmd
);
755 WriteDOC(0, docptr
, Mplus_WritePipeTerm
);
756 WriteDOC(0, docptr
, Mplus_WritePipeTerm
);
758 if (column
!= -1 || page_addr
!= -1) {
759 /* Serially input address */
761 /* Adjust columns for 16 bit buswidth */
762 if (this->options
& NAND_BUSWIDTH_16
)
764 WriteDOC(column
, docptr
, Mplus_FlashAddress
);
766 if (page_addr
!= -1) {
767 WriteDOC((unsigned char)(page_addr
& 0xff), docptr
, Mplus_FlashAddress
);
768 WriteDOC((unsigned char)((page_addr
>> 8) & 0xff), docptr
, Mplus_FlashAddress
);
769 /* One more address cycle for higher density devices */
770 if (this->chipsize
& 0x0c000000) {
771 WriteDOC((unsigned char)((page_addr
>> 16) & 0x0f), docptr
, Mplus_FlashAddress
);
772 printk("high density\n");
775 WriteDOC(0, docptr
, Mplus_WritePipeTerm
);
776 WriteDOC(0, docptr
, Mplus_WritePipeTerm
);
778 if (command
== NAND_CMD_READ0
|| command
== NAND_CMD_READ1
||
779 command
== NAND_CMD_READOOB
|| command
== NAND_CMD_READID
)
780 WriteDOC(0, docptr
, Mplus_FlashControl
);
784 * program and erase have their own busy handlers
785 * status and sequential in needs no delay
789 case NAND_CMD_PAGEPROG
:
790 case NAND_CMD_ERASE1
:
791 case NAND_CMD_ERASE2
:
793 case NAND_CMD_STATUS
:
799 udelay(this->chip_delay
);
800 WriteDOC(NAND_CMD_STATUS
, docptr
, Mplus_FlashCmd
);
801 WriteDOC(0, docptr
, Mplus_WritePipeTerm
);
802 WriteDOC(0, docptr
, Mplus_WritePipeTerm
);
803 while (!(this->read_byte(mtd
) & 0x40)) ;
806 /* This applies to read commands */
809 * If we don't have access to the busy pin, we apply the given
812 if (!this->dev_ready
) {
813 udelay(this->chip_delay
);
818 /* Apply this short delay always to ensure that we do wait tWB in
819 * any case on any machine. */
821 /* wait until command is processed */
822 while (!this->dev_ready(mtd
)) ;
825 static int doc200x_dev_ready(struct mtd_info
*mtd
)
827 struct nand_chip
*this = mtd
->priv
;
828 struct doc_priv
*doc
= this->priv
;
829 void __iomem
*docptr
= doc
->virtadr
;
831 if (DoC_is_MillenniumPlus(doc
)) {
832 /* 11.4.2 -- must NOP four times before checking FR/B# */
834 if ((ReadDOC(docptr
, Mplus_FlashControl
) & CDSN_CTRL_FR_B_MASK
) != CDSN_CTRL_FR_B_MASK
) {
836 printk("not ready\n");
840 printk("was ready\n");
843 /* 11.4.2 -- must NOP four times before checking FR/B# */
845 if (!(ReadDOC(docptr
, CDSNControl
) & CDSN_CTRL_FR_B
)) {
847 printk("not ready\n");
850 /* 11.4.2 -- Must NOP twice if it's ready */
853 printk("was ready\n");
858 static int doc200x_block_bad(struct mtd_info
*mtd
, loff_t ofs
, int getchip
)
860 /* This is our last resort if we couldn't find or create a BBT. Just
861 pretend all blocks are good. */
865 static void doc200x_enable_hwecc(struct mtd_info
*mtd
, int mode
)
867 struct nand_chip
*this = mtd
->priv
;
868 struct doc_priv
*doc
= this->priv
;
869 void __iomem
*docptr
= doc
->virtadr
;
871 /* Prime the ECC engine */
874 WriteDOC(DOC_ECC_RESET
, docptr
, ECCConf
);
875 WriteDOC(DOC_ECC_EN
, docptr
, ECCConf
);
878 WriteDOC(DOC_ECC_RESET
, docptr
, ECCConf
);
879 WriteDOC(DOC_ECC_EN
| DOC_ECC_RW
, docptr
, ECCConf
);
884 static void doc2001plus_enable_hwecc(struct mtd_info
*mtd
, int mode
)
886 struct nand_chip
*this = mtd
->priv
;
887 struct doc_priv
*doc
= this->priv
;
888 void __iomem
*docptr
= doc
->virtadr
;
890 /* Prime the ECC engine */
893 WriteDOC(DOC_ECC_RESET
, docptr
, Mplus_ECCConf
);
894 WriteDOC(DOC_ECC_EN
, docptr
, Mplus_ECCConf
);
897 WriteDOC(DOC_ECC_RESET
, docptr
, Mplus_ECCConf
);
898 WriteDOC(DOC_ECC_EN
| DOC_ECC_RW
, docptr
, Mplus_ECCConf
);
903 /* This code is only called on write */
904 static int doc200x_calculate_ecc(struct mtd_info
*mtd
, const u_char
*dat
, unsigned char *ecc_code
)
906 struct nand_chip
*this = mtd
->priv
;
907 struct doc_priv
*doc
= this->priv
;
908 void __iomem
*docptr
= doc
->virtadr
;
912 /* flush the pipeline */
913 if (DoC_is_2000(doc
)) {
914 WriteDOC(doc
->CDSNControl
& ~CDSN_CTRL_FLASH_IO
, docptr
, CDSNControl
);
915 WriteDOC(0, docptr
, 2k_CDSN_IO
);
916 WriteDOC(0, docptr
, 2k_CDSN_IO
);
917 WriteDOC(0, docptr
, 2k_CDSN_IO
);
918 WriteDOC(doc
->CDSNControl
, docptr
, CDSNControl
);
919 } else if (DoC_is_MillenniumPlus(doc
)) {
920 WriteDOC(0, docptr
, Mplus_NOP
);
921 WriteDOC(0, docptr
, Mplus_NOP
);
922 WriteDOC(0, docptr
, Mplus_NOP
);
924 WriteDOC(0, docptr
, NOP
);
925 WriteDOC(0, docptr
, NOP
);
926 WriteDOC(0, docptr
, NOP
);
929 for (i
= 0; i
< 6; i
++) {
930 if (DoC_is_MillenniumPlus(doc
))
931 ecc_code
[i
] = ReadDOC_(docptr
, DoC_Mplus_ECCSyndrome0
+ i
);
933 ecc_code
[i
] = ReadDOC_(docptr
, DoC_ECCSyndrome0
+ i
);
934 if (ecc_code
[i
] != empty_write_ecc
[i
])
937 if (DoC_is_MillenniumPlus(doc
))
938 WriteDOC(DOC_ECC_DIS
, docptr
, Mplus_ECCConf
);
940 WriteDOC(DOC_ECC_DIS
, docptr
, ECCConf
);
944 static int doc200x_correct_data(struct mtd_info
*mtd
, u_char
*dat
,
945 u_char
*read_ecc
, u_char
*isnull
)
948 struct nand_chip
*this = mtd
->priv
;
949 struct doc_priv
*doc
= this->priv
;
950 void __iomem
*docptr
= doc
->virtadr
;
952 volatile u_char dummy
;
955 /* flush the pipeline */
956 if (DoC_is_2000(doc
)) {
957 dummy
= ReadDOC(docptr
, 2k_ECCStatus
);
958 dummy
= ReadDOC(docptr
, 2k_ECCStatus
);
959 dummy
= ReadDOC(docptr
, 2k_ECCStatus
);
960 } else if (DoC_is_MillenniumPlus(doc
)) {
961 dummy
= ReadDOC(docptr
, Mplus_ECCConf
);
962 dummy
= ReadDOC(docptr
, Mplus_ECCConf
);
963 dummy
= ReadDOC(docptr
, Mplus_ECCConf
);
965 dummy
= ReadDOC(docptr
, ECCConf
);
966 dummy
= ReadDOC(docptr
, ECCConf
);
967 dummy
= ReadDOC(docptr
, ECCConf
);
970 /* Error occured ? */
972 for (i
= 0; i
< 6; i
++) {
973 if (DoC_is_MillenniumPlus(doc
))
974 calc_ecc
[i
] = ReadDOC_(docptr
, DoC_Mplus_ECCSyndrome0
+ i
);
976 calc_ecc
[i
] = ReadDOC_(docptr
, DoC_ECCSyndrome0
+ i
);
977 if (calc_ecc
[i
] != empty_read_syndrome
[i
])
980 /* If emptymatch=1, the read syndrome is consistent with an
981 all-0xff data and stored ecc block. Check the stored ecc. */
983 for (i
= 0; i
< 6; i
++) {
984 if (read_ecc
[i
] == 0xff)
990 /* If emptymatch still =1, check the data block. */
992 /* Note: this somewhat expensive test should not be triggered
993 often. It could be optimized away by examining the data in
994 the readbuf routine, and remembering the result. */
995 for (i
= 0; i
< 512; i
++) {
1002 /* If emptymatch still =1, this is almost certainly a freshly-
1003 erased block, in which case the ECC will not come out right.
1004 We'll suppress the error and tell the caller everything's
1005 OK. Because it is. */
1007 ret
= doc_ecc_decode(rs_decoder
, dat
, calc_ecc
);
1009 printk(KERN_ERR
"doc200x_correct_data corrected %d errors\n", ret
);
1011 if (DoC_is_MillenniumPlus(doc
))
1012 WriteDOC(DOC_ECC_DIS
, docptr
, Mplus_ECCConf
);
1014 WriteDOC(DOC_ECC_DIS
, docptr
, ECCConf
);
1015 if (no_ecc_failures
&& (ret
== -EBADMSG
)) {
1016 printk(KERN_ERR
"suppressing ECC failure\n");
1022 //u_char mydatabuf[528];
1024 /* The strange out-of-order .oobfree list below is a (possibly unneeded)
1025 * attempt to retain compatibility. It used to read:
1026 * .oobfree = { {8, 8} }
1027 * Since that leaves two bytes unusable, it was changed. But the following
1028 * scheme might affect existing jffs2 installs by moving the cleanmarker:
1029 * .oobfree = { {6, 10} }
1030 * jffs2 seems to handle the above gracefully, but the current scheme seems
1031 * safer. The only problem with it is that any code that parses oobfree must
1032 * be able to handle out-of-order segments.
1034 static struct nand_ecclayout doc200x_oobinfo
= {
1036 .eccpos
= {0, 1, 2, 3, 4, 5},
1037 .oobfree
= {{8, 8}, {6, 2}}
1040 /* Find the (I)NFTL Media Header, and optionally also the mirror media header.
1041 On successful return, buf will contain a copy of the media header for
1042 further processing. id is the string to scan for, and will presumably be
1043 either "ANAND" or "BNAND". If findmirror=1, also look for the mirror media
1044 header. The page #s of the found media headers are placed in mh0_page and
1045 mh1_page in the DOC private structure. */
1046 static int __init
find_media_headers(struct mtd_info
*mtd
, u_char
*buf
, const char *id
, int findmirror
)
1048 struct nand_chip
*this = mtd
->priv
;
1049 struct doc_priv
*doc
= this->priv
;
1054 for (offs
= 0; offs
< mtd
->size
; offs
+= mtd
->erasesize
) {
1055 ret
= mtd
->read(mtd
, offs
, mtd
->writesize
, &retlen
, buf
);
1056 if (retlen
!= mtd
->writesize
)
1059 printk(KERN_WARNING
"ECC error scanning DOC at 0x%x\n", offs
);
1061 if (memcmp(buf
, id
, 6))
1063 printk(KERN_INFO
"Found DiskOnChip %s Media Header at 0x%x\n", id
, offs
);
1064 if (doc
->mh0_page
== -1) {
1065 doc
->mh0_page
= offs
>> this->page_shift
;
1070 doc
->mh1_page
= offs
>> this->page_shift
;
1073 if (doc
->mh0_page
== -1) {
1074 printk(KERN_WARNING
"DiskOnChip %s Media Header not found.\n", id
);
1077 /* Only one mediaheader was found. We want buf to contain a
1078 mediaheader on return, so we'll have to re-read the one we found. */
1079 offs
= doc
->mh0_page
<< this->page_shift
;
1080 ret
= mtd
->read(mtd
, offs
, mtd
->writesize
, &retlen
, buf
);
1081 if (retlen
!= mtd
->writesize
) {
1082 /* Insanity. Give up. */
1083 printk(KERN_ERR
"Read DiskOnChip Media Header once, but can't reread it???\n");
1089 static inline int __init
nftl_partscan(struct mtd_info
*mtd
, struct mtd_partition
*parts
)
1091 struct nand_chip
*this = mtd
->priv
;
1092 struct doc_priv
*doc
= this->priv
;
1095 struct NFTLMediaHeader
*mh
;
1096 const unsigned psize
= 1 << this->page_shift
;
1098 unsigned blocks
, maxblocks
;
1099 int offs
, numheaders
;
1101 buf
= kmalloc(mtd
->writesize
, GFP_KERNEL
);
1103 printk(KERN_ERR
"DiskOnChip mediaheader kmalloc failed!\n");
1106 if (!(numheaders
= find_media_headers(mtd
, buf
, "ANAND", 1)))
1108 mh
= (struct NFTLMediaHeader
*)buf
;
1110 le16_to_cpus(&mh
->NumEraseUnits
);
1111 le16_to_cpus(&mh
->FirstPhysicalEUN
);
1112 le32_to_cpus(&mh
->FormattedSize
);
1114 printk(KERN_INFO
" DataOrgID = %s\n"
1115 " NumEraseUnits = %d\n"
1116 " FirstPhysicalEUN = %d\n"
1117 " FormattedSize = %d\n"
1118 " UnitSizeFactor = %d\n",
1119 mh
->DataOrgID
, mh
->NumEraseUnits
,
1120 mh
->FirstPhysicalEUN
, mh
->FormattedSize
,
1121 mh
->UnitSizeFactor
);
1123 blocks
= mtd
->size
>> this->phys_erase_shift
;
1124 maxblocks
= min(32768U, mtd
->erasesize
- psize
);
1126 if (mh
->UnitSizeFactor
== 0x00) {
1127 /* Auto-determine UnitSizeFactor. The constraints are:
1128 - There can be at most 32768 virtual blocks.
1129 - There can be at most (virtual block size - page size)
1130 virtual blocks (because MediaHeader+BBT must fit in 1).
1132 mh
->UnitSizeFactor
= 0xff;
1133 while (blocks
> maxblocks
) {
1135 maxblocks
= min(32768U, (maxblocks
<< 1) + psize
);
1136 mh
->UnitSizeFactor
--;
1138 printk(KERN_WARNING
"UnitSizeFactor=0x00 detected. Correct value is assumed to be 0x%02x.\n", mh
->UnitSizeFactor
);
1141 /* NOTE: The lines below modify internal variables of the NAND and MTD
1142 layers; variables with have already been configured by nand_scan.
1143 Unfortunately, we didn't know before this point what these values
1144 should be. Thus, this code is somewhat dependant on the exact
1145 implementation of the NAND layer. */
1146 if (mh
->UnitSizeFactor
!= 0xff) {
1147 this->bbt_erase_shift
+= (0xff - mh
->UnitSizeFactor
);
1148 mtd
->erasesize
<<= (0xff - mh
->UnitSizeFactor
);
1149 printk(KERN_INFO
"Setting virtual erase size to %d\n", mtd
->erasesize
);
1150 blocks
= mtd
->size
>> this->bbt_erase_shift
;
1151 maxblocks
= min(32768U, mtd
->erasesize
- psize
);
1154 if (blocks
> maxblocks
) {
1155 printk(KERN_ERR
"UnitSizeFactor of 0x%02x is inconsistent with device size. Aborting.\n", mh
->UnitSizeFactor
);
1159 /* Skip past the media headers. */
1160 offs
= max(doc
->mh0_page
, doc
->mh1_page
);
1161 offs
<<= this->page_shift
;
1162 offs
+= mtd
->erasesize
;
1164 if (show_firmware_partition
== 1) {
1165 parts
[0].name
= " DiskOnChip Firmware / Media Header partition";
1166 parts
[0].offset
= 0;
1167 parts
[0].size
= offs
;
1171 parts
[numparts
].name
= " DiskOnChip BDTL partition";
1172 parts
[numparts
].offset
= offs
;
1173 parts
[numparts
].size
= (mh
->NumEraseUnits
- numheaders
) << this->bbt_erase_shift
;
1175 offs
+= parts
[numparts
].size
;
1178 if (offs
< mtd
->size
) {
1179 parts
[numparts
].name
= " DiskOnChip Remainder partition";
1180 parts
[numparts
].offset
= offs
;
1181 parts
[numparts
].size
= mtd
->size
- offs
;
1191 /* This is a stripped-down copy of the code in inftlmount.c */
1192 static inline int __init
inftl_partscan(struct mtd_info
*mtd
, struct mtd_partition
*parts
)
1194 struct nand_chip
*this = mtd
->priv
;
1195 struct doc_priv
*doc
= this->priv
;
1198 struct INFTLMediaHeader
*mh
;
1199 struct INFTLPartition
*ip
;
1202 int vshift
, lastvunit
= 0;
1204 int end
= mtd
->size
;
1206 if (inftl_bbt_write
)
1207 end
-= (INFTL_BBT_RESERVED_BLOCKS
<< this->phys_erase_shift
);
1209 buf
= kmalloc(mtd
->writesize
, GFP_KERNEL
);
1211 printk(KERN_ERR
"DiskOnChip mediaheader kmalloc failed!\n");
1215 if (!find_media_headers(mtd
, buf
, "BNAND", 0))
1217 doc
->mh1_page
= doc
->mh0_page
+ (4096 >> this->page_shift
);
1218 mh
= (struct INFTLMediaHeader
*)buf
;
1220 le32_to_cpus(&mh
->NoOfBootImageBlocks
);
1221 le32_to_cpus(&mh
->NoOfBinaryPartitions
);
1222 le32_to_cpus(&mh
->NoOfBDTLPartitions
);
1223 le32_to_cpus(&mh
->BlockMultiplierBits
);
1224 le32_to_cpus(&mh
->FormatFlags
);
1225 le32_to_cpus(&mh
->PercentUsed
);
1227 printk(KERN_INFO
" bootRecordID = %s\n"
1228 " NoOfBootImageBlocks = %d\n"
1229 " NoOfBinaryPartitions = %d\n"
1230 " NoOfBDTLPartitions = %d\n"
1231 " BlockMultiplerBits = %d\n"
1232 " FormatFlgs = %d\n"
1233 " OsakVersion = %d.%d.%d.%d\n"
1234 " PercentUsed = %d\n",
1235 mh
->bootRecordID
, mh
->NoOfBootImageBlocks
,
1236 mh
->NoOfBinaryPartitions
,
1237 mh
->NoOfBDTLPartitions
,
1238 mh
->BlockMultiplierBits
, mh
->FormatFlags
,
1239 ((unsigned char *) &mh
->OsakVersion
)[0] & 0xf,
1240 ((unsigned char *) &mh
->OsakVersion
)[1] & 0xf,
1241 ((unsigned char *) &mh
->OsakVersion
)[2] & 0xf,
1242 ((unsigned char *) &mh
->OsakVersion
)[3] & 0xf,
1245 vshift
= this->phys_erase_shift
+ mh
->BlockMultiplierBits
;
1247 blocks
= mtd
->size
>> vshift
;
1248 if (blocks
> 32768) {
1249 printk(KERN_ERR
"BlockMultiplierBits=%d is inconsistent with device size. Aborting.\n", mh
->BlockMultiplierBits
);
1253 blocks
= doc
->chips_per_floor
<< (this->chip_shift
- this->phys_erase_shift
);
1254 if (inftl_bbt_write
&& (blocks
> mtd
->erasesize
)) {
1255 printk(KERN_ERR
"Writeable BBTs spanning more than one erase block are not yet supported. FIX ME!\n");
1259 /* Scan the partitions */
1260 for (i
= 0; (i
< 4); i
++) {
1261 ip
= &(mh
->Partitions
[i
]);
1262 le32_to_cpus(&ip
->virtualUnits
);
1263 le32_to_cpus(&ip
->firstUnit
);
1264 le32_to_cpus(&ip
->lastUnit
);
1265 le32_to_cpus(&ip
->flags
);
1266 le32_to_cpus(&ip
->spareUnits
);
1267 le32_to_cpus(&ip
->Reserved0
);
1269 printk(KERN_INFO
" PARTITION[%d] ->\n"
1270 " virtualUnits = %d\n"
1274 " spareUnits = %d\n",
1275 i
, ip
->virtualUnits
, ip
->firstUnit
,
1276 ip
->lastUnit
, ip
->flags
,
1279 if ((show_firmware_partition
== 1) &&
1280 (i
== 0) && (ip
->firstUnit
> 0)) {
1281 parts
[0].name
= " DiskOnChip IPL / Media Header partition";
1282 parts
[0].offset
= 0;
1283 parts
[0].size
= mtd
->erasesize
* ip
->firstUnit
;
1287 if (ip
->flags
& INFTL_BINARY
)
1288 parts
[numparts
].name
= " DiskOnChip BDK partition";
1290 parts
[numparts
].name
= " DiskOnChip BDTL partition";
1291 parts
[numparts
].offset
= ip
->firstUnit
<< vshift
;
1292 parts
[numparts
].size
= (1 + ip
->lastUnit
- ip
->firstUnit
) << vshift
;
1294 if (ip
->lastUnit
> lastvunit
)
1295 lastvunit
= ip
->lastUnit
;
1296 if (ip
->flags
& INFTL_LAST
)
1300 if ((lastvunit
<< vshift
) < end
) {
1301 parts
[numparts
].name
= " DiskOnChip Remainder partition";
1302 parts
[numparts
].offset
= lastvunit
<< vshift
;
1303 parts
[numparts
].size
= end
- parts
[numparts
].offset
;
1312 static int __init
nftl_scan_bbt(struct mtd_info
*mtd
)
1315 struct nand_chip
*this = mtd
->priv
;
1316 struct doc_priv
*doc
= this->priv
;
1317 struct mtd_partition parts
[2];
1319 memset((char *)parts
, 0, sizeof(parts
));
1320 /* On NFTL, we have to find the media headers before we can read the
1321 BBTs, since they're stored in the media header eraseblocks. */
1322 numparts
= nftl_partscan(mtd
, parts
);
1325 this->bbt_td
->options
= NAND_BBT_ABSPAGE
| NAND_BBT_8BIT
|
1326 NAND_BBT_SAVECONTENT
| NAND_BBT_WRITE
|
1328 this->bbt_td
->veroffs
= 7;
1329 this->bbt_td
->pages
[0] = doc
->mh0_page
+ 1;
1330 if (doc
->mh1_page
!= -1) {
1331 this->bbt_md
->options
= NAND_BBT_ABSPAGE
| NAND_BBT_8BIT
|
1332 NAND_BBT_SAVECONTENT
| NAND_BBT_WRITE
|
1334 this->bbt_md
->veroffs
= 7;
1335 this->bbt_md
->pages
[0] = doc
->mh1_page
+ 1;
1337 this->bbt_md
= NULL
;
1340 /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set.
1341 At least as nand_bbt.c is currently written. */
1342 if ((ret
= nand_scan_bbt(mtd
, NULL
)))
1344 add_mtd_device(mtd
);
1345 #ifdef CONFIG_MTD_PARTITIONS
1347 add_mtd_partitions(mtd
, parts
, numparts
);
1352 static int __init
inftl_scan_bbt(struct mtd_info
*mtd
)
1355 struct nand_chip
*this = mtd
->priv
;
1356 struct doc_priv
*doc
= this->priv
;
1357 struct mtd_partition parts
[5];
1359 if (this->numchips
> doc
->chips_per_floor
) {
1360 printk(KERN_ERR
"Multi-floor INFTL devices not yet supported.\n");
1364 if (DoC_is_MillenniumPlus(doc
)) {
1365 this->bbt_td
->options
= NAND_BBT_2BIT
| NAND_BBT_ABSPAGE
;
1366 if (inftl_bbt_write
)
1367 this->bbt_td
->options
|= NAND_BBT_WRITE
;
1368 this->bbt_td
->pages
[0] = 2;
1369 this->bbt_md
= NULL
;
1371 this->bbt_td
->options
= NAND_BBT_LASTBLOCK
| NAND_BBT_8BIT
| NAND_BBT_VERSION
;
1372 if (inftl_bbt_write
)
1373 this->bbt_td
->options
|= NAND_BBT_WRITE
;
1374 this->bbt_td
->offs
= 8;
1375 this->bbt_td
->len
= 8;
1376 this->bbt_td
->veroffs
= 7;
1377 this->bbt_td
->maxblocks
= INFTL_BBT_RESERVED_BLOCKS
;
1378 this->bbt_td
->reserved_block_code
= 0x01;
1379 this->bbt_td
->pattern
= "MSYS_BBT";
1381 this->bbt_md
->options
= NAND_BBT_LASTBLOCK
| NAND_BBT_8BIT
| NAND_BBT_VERSION
;
1382 if (inftl_bbt_write
)
1383 this->bbt_md
->options
|= NAND_BBT_WRITE
;
1384 this->bbt_md
->offs
= 8;
1385 this->bbt_md
->len
= 8;
1386 this->bbt_md
->veroffs
= 7;
1387 this->bbt_md
->maxblocks
= INFTL_BBT_RESERVED_BLOCKS
;
1388 this->bbt_md
->reserved_block_code
= 0x01;
1389 this->bbt_md
->pattern
= "TBB_SYSM";
1392 /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set.
1393 At least as nand_bbt.c is currently written. */
1394 if ((ret
= nand_scan_bbt(mtd
, NULL
)))
1396 memset((char *)parts
, 0, sizeof(parts
));
1397 numparts
= inftl_partscan(mtd
, parts
);
1398 /* At least for now, require the INFTL Media Header. We could probably
1399 do without it for non-INFTL use, since all it gives us is
1400 autopartitioning, but I want to give it more thought. */
1403 add_mtd_device(mtd
);
1404 #ifdef CONFIG_MTD_PARTITIONS
1406 add_mtd_partitions(mtd
, parts
, numparts
);
1411 static inline int __init
doc2000_init(struct mtd_info
*mtd
)
1413 struct nand_chip
*this = mtd
->priv
;
1414 struct doc_priv
*doc
= this->priv
;
1416 this->read_byte
= doc2000_read_byte
;
1417 this->write_buf
= doc2000_writebuf
;
1418 this->read_buf
= doc2000_readbuf
;
1419 this->verify_buf
= doc2000_verifybuf
;
1420 this->scan_bbt
= nftl_scan_bbt
;
1422 doc
->CDSNControl
= CDSN_CTRL_FLASH_IO
| CDSN_CTRL_ECC_IO
;
1423 doc2000_count_chips(mtd
);
1424 mtd
->name
= "DiskOnChip 2000 (NFTL Model)";
1425 return (4 * doc
->chips_per_floor
);
1428 static inline int __init
doc2001_init(struct mtd_info
*mtd
)
1430 struct nand_chip
*this = mtd
->priv
;
1431 struct doc_priv
*doc
= this->priv
;
1433 this->read_byte
= doc2001_read_byte
;
1434 this->write_buf
= doc2001_writebuf
;
1435 this->read_buf
= doc2001_readbuf
;
1436 this->verify_buf
= doc2001_verifybuf
;
1438 ReadDOC(doc
->virtadr
, ChipID
);
1439 ReadDOC(doc
->virtadr
, ChipID
);
1440 ReadDOC(doc
->virtadr
, ChipID
);
1441 if (ReadDOC(doc
->virtadr
, ChipID
) != DOC_ChipID_DocMil
) {
1442 /* It's not a Millennium; it's one of the newer
1443 DiskOnChip 2000 units with a similar ASIC.
1444 Treat it like a Millennium, except that it
1445 can have multiple chips. */
1446 doc2000_count_chips(mtd
);
1447 mtd
->name
= "DiskOnChip 2000 (INFTL Model)";
1448 this->scan_bbt
= inftl_scan_bbt
;
1449 return (4 * doc
->chips_per_floor
);
1451 /* Bog-standard Millennium */
1452 doc
->chips_per_floor
= 1;
1453 mtd
->name
= "DiskOnChip Millennium";
1454 this->scan_bbt
= nftl_scan_bbt
;
1459 static inline int __init
doc2001plus_init(struct mtd_info
*mtd
)
1461 struct nand_chip
*this = mtd
->priv
;
1462 struct doc_priv
*doc
= this->priv
;
1464 this->read_byte
= doc2001plus_read_byte
;
1465 this->write_buf
= doc2001plus_writebuf
;
1466 this->read_buf
= doc2001plus_readbuf
;
1467 this->verify_buf
= doc2001plus_verifybuf
;
1468 this->scan_bbt
= inftl_scan_bbt
;
1469 this->cmd_ctrl
= NULL
;
1470 this->select_chip
= doc2001plus_select_chip
;
1471 this->cmdfunc
= doc2001plus_command
;
1472 this->ecc
.hwctl
= doc2001plus_enable_hwecc
;
1474 doc
->chips_per_floor
= 1;
1475 mtd
->name
= "DiskOnChip Millennium Plus";
1480 static int __init
doc_probe(unsigned long physadr
)
1482 unsigned char ChipID
;
1483 struct mtd_info
*mtd
;
1484 struct nand_chip
*nand
;
1485 struct doc_priv
*doc
;
1486 void __iomem
*virtadr
;
1487 unsigned char save_control
;
1488 unsigned char tmp
, tmpb
, tmpc
;
1489 int reg
, len
, numchips
;
1492 virtadr
= ioremap(physadr
, DOC_IOREMAP_LEN
);
1494 printk(KERN_ERR
"Diskonchip ioremap failed: 0x%x bytes at 0x%lx\n", DOC_IOREMAP_LEN
, physadr
);
1498 /* It's not possible to cleanly detect the DiskOnChip - the
1499 * bootup procedure will put the device into reset mode, and
1500 * it's not possible to talk to it without actually writing
1501 * to the DOCControl register. So we store the current contents
1502 * of the DOCControl register's location, in case we later decide
1503 * that it's not a DiskOnChip, and want to put it back how we
1506 save_control
= ReadDOC(virtadr
, DOCControl
);
1508 /* Reset the DiskOnChip ASIC */
1509 WriteDOC(DOC_MODE_CLR_ERR
| DOC_MODE_MDWREN
| DOC_MODE_RESET
, virtadr
, DOCControl
);
1510 WriteDOC(DOC_MODE_CLR_ERR
| DOC_MODE_MDWREN
| DOC_MODE_RESET
, virtadr
, DOCControl
);
1512 /* Enable the DiskOnChip ASIC */
1513 WriteDOC(DOC_MODE_CLR_ERR
| DOC_MODE_MDWREN
| DOC_MODE_NORMAL
, virtadr
, DOCControl
);
1514 WriteDOC(DOC_MODE_CLR_ERR
| DOC_MODE_MDWREN
| DOC_MODE_NORMAL
, virtadr
, DOCControl
);
1516 ChipID
= ReadDOC(virtadr
, ChipID
);
1519 case DOC_ChipID_Doc2k
:
1520 reg
= DoC_2k_ECCStatus
;
1522 case DOC_ChipID_DocMil
:
1525 case DOC_ChipID_DocMilPlus16
:
1526 case DOC_ChipID_DocMilPlus32
:
1528 /* Possible Millennium Plus, need to do more checks */
1529 /* Possibly release from power down mode */
1530 for (tmp
= 0; (tmp
< 4); tmp
++)
1531 ReadDOC(virtadr
, Mplus_Power
);
1533 /* Reset the Millennium Plus ASIC */
1534 tmp
= DOC_MODE_RESET
| DOC_MODE_MDWREN
| DOC_MODE_RST_LAT
| DOC_MODE_BDECT
;
1535 WriteDOC(tmp
, virtadr
, Mplus_DOCControl
);
1536 WriteDOC(~tmp
, virtadr
, Mplus_CtrlConfirm
);
1539 /* Enable the Millennium Plus ASIC */
1540 tmp
= DOC_MODE_NORMAL
| DOC_MODE_MDWREN
| DOC_MODE_RST_LAT
| DOC_MODE_BDECT
;
1541 WriteDOC(tmp
, virtadr
, Mplus_DOCControl
);
1542 WriteDOC(~tmp
, virtadr
, Mplus_CtrlConfirm
);
1545 ChipID
= ReadDOC(virtadr
, ChipID
);
1548 case DOC_ChipID_DocMilPlus16
:
1549 reg
= DoC_Mplus_Toggle
;
1551 case DOC_ChipID_DocMilPlus32
:
1552 printk(KERN_ERR
"DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n");
1563 /* Check the TOGGLE bit in the ECC register */
1564 tmp
= ReadDOC_(virtadr
, reg
) & DOC_TOGGLE_BIT
;
1565 tmpb
= ReadDOC_(virtadr
, reg
) & DOC_TOGGLE_BIT
;
1566 tmpc
= ReadDOC_(virtadr
, reg
) & DOC_TOGGLE_BIT
;
1567 if ((tmp
== tmpb
) || (tmp
!= tmpc
)) {
1568 printk(KERN_WARNING
"Possible DiskOnChip at 0x%lx failed TOGGLE test, dropping.\n", physadr
);
1573 for (mtd
= doclist
; mtd
; mtd
= doc
->nextdoc
) {
1574 unsigned char oldval
;
1575 unsigned char newval
;
1578 /* Use the alias resolution register to determine if this is
1579 in fact the same DOC aliased to a new address. If writes
1580 to one chip's alias resolution register change the value on
1581 the other chip, they're the same chip. */
1582 if (ChipID
== DOC_ChipID_DocMilPlus16
) {
1583 oldval
= ReadDOC(doc
->virtadr
, Mplus_AliasResolution
);
1584 newval
= ReadDOC(virtadr
, Mplus_AliasResolution
);
1586 oldval
= ReadDOC(doc
->virtadr
, AliasResolution
);
1587 newval
= ReadDOC(virtadr
, AliasResolution
);
1589 if (oldval
!= newval
)
1591 if (ChipID
== DOC_ChipID_DocMilPlus16
) {
1592 WriteDOC(~newval
, virtadr
, Mplus_AliasResolution
);
1593 oldval
= ReadDOC(doc
->virtadr
, Mplus_AliasResolution
);
1594 WriteDOC(newval
, virtadr
, Mplus_AliasResolution
); // restore it
1596 WriteDOC(~newval
, virtadr
, AliasResolution
);
1597 oldval
= ReadDOC(doc
->virtadr
, AliasResolution
);
1598 WriteDOC(newval
, virtadr
, AliasResolution
); // restore it
1601 if (oldval
== newval
) {
1602 printk(KERN_DEBUG
"Found alias of DOC at 0x%lx to 0x%lx\n", doc
->physadr
, physadr
);
1607 printk(KERN_NOTICE
"DiskOnChip found at 0x%lx\n", physadr
);
1609 len
= sizeof(struct mtd_info
) +
1610 sizeof(struct nand_chip
) + sizeof(struct doc_priv
) + (2 * sizeof(struct nand_bbt_descr
));
1611 mtd
= kzalloc(len
, GFP_KERNEL
);
1613 printk(KERN_ERR
"DiskOnChip kmalloc (%d bytes) failed!\n", len
);
1618 nand
= (struct nand_chip
*) (mtd
+ 1);
1619 doc
= (struct doc_priv
*) (nand
+ 1);
1620 nand
->bbt_td
= (struct nand_bbt_descr
*) (doc
+ 1);
1621 nand
->bbt_md
= nand
->bbt_td
+ 1;
1624 mtd
->owner
= THIS_MODULE
;
1627 nand
->select_chip
= doc200x_select_chip
;
1628 nand
->cmd_ctrl
= doc200x_hwcontrol
;
1629 nand
->dev_ready
= doc200x_dev_ready
;
1630 nand
->waitfunc
= doc200x_wait
;
1631 nand
->block_bad
= doc200x_block_bad
;
1632 nand
->ecc
.hwctl
= doc200x_enable_hwecc
;
1633 nand
->ecc
.calculate
= doc200x_calculate_ecc
;
1634 nand
->ecc
.correct
= doc200x_correct_data
;
1636 nand
->ecc
.layout
= &doc200x_oobinfo
;
1637 nand
->ecc
.mode
= NAND_ECC_HW_SYNDROME
;
1638 nand
->ecc
.size
= 512;
1639 nand
->ecc
.bytes
= 6;
1640 nand
->options
= NAND_USE_FLASH_BBT
;
1642 doc
->physadr
= physadr
;
1643 doc
->virtadr
= virtadr
;
1644 doc
->ChipID
= ChipID
;
1649 doc
->nextdoc
= doclist
;
1651 if (ChipID
== DOC_ChipID_Doc2k
)
1652 numchips
= doc2000_init(mtd
);
1653 else if (ChipID
== DOC_ChipID_DocMilPlus16
)
1654 numchips
= doc2001plus_init(mtd
);
1656 numchips
= doc2001_init(mtd
);
1658 if ((ret
= nand_scan(mtd
, numchips
))) {
1659 /* DBB note: i believe nand_release is necessary here, as
1660 buffers may have been allocated in nand_base. Check with
1662 /* nand_release will call del_mtd_device, but we haven't yet
1663 added it. This is handled without incident by
1664 del_mtd_device, as far as I can tell. */
1675 /* Put back the contents of the DOCControl register, in case it's not
1676 actually a DiskOnChip. */
1677 WriteDOC(save_control
, virtadr
, DOCControl
);
1683 static void release_nanddoc(void)
1685 struct mtd_info
*mtd
, *nextmtd
;
1686 struct nand_chip
*nand
;
1687 struct doc_priv
*doc
;
1689 for (mtd
= doclist
; mtd
; mtd
= nextmtd
) {
1693 nextmtd
= doc
->nextdoc
;
1695 iounmap(doc
->virtadr
);
1700 static int __init
init_nanddoc(void)
1704 /* We could create the decoder on demand, if memory is a concern.
1705 * This way we have it handy, if an error happens
1707 * Symbolsize is 10 (bits)
1708 * Primitve polynomial is x^10+x^3+1
1709 * first consecutive root is 510
1710 * primitve element to generate roots = 1
1711 * generator polinomial degree = 4
1713 rs_decoder
= init_rs(10, 0x409, FCR
, 1, NROOTS
);
1715 printk(KERN_ERR
"DiskOnChip: Could not create a RS decoder\n");
1719 if (doc_config_location
) {
1720 printk(KERN_INFO
"Using configured DiskOnChip probe address 0x%lx\n", doc_config_location
);
1721 ret
= doc_probe(doc_config_location
);
1725 for (i
= 0; (doc_locations
[i
] != 0xffffffff); i
++) {
1726 doc_probe(doc_locations
[i
]);
1729 /* No banner message any more. Print a message if no DiskOnChip
1730 found, so the user knows we at least tried. */
1732 printk(KERN_INFO
"No valid DiskOnChip devices found\n");
1738 free_rs(rs_decoder
);
1742 static void __exit
cleanup_nanddoc(void)
1744 /* Cleanup the nand/DoC resources */
1747 /* Free the reed solomon resources */
1749 free_rs(rs_decoder
);
1753 module_init(init_nanddoc
);
1754 module_exit(cleanup_nanddoc
);
1756 MODULE_LICENSE("GPL");
1757 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
1758 MODULE_DESCRIPTION("M-Systems DiskOnChip 2000, Millennium and Millennium Plus device driver");