3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #include <asm/processor.h>
27 #include <asm/pci_io.h>
29 #define ROM_CS0_START 0xFF800000
30 #define ROM_CS1_START 0xFF000000
32 flash_info_t flash_info
[CFG_MAX_FLASH_BANKS
]; /* info for FLASH chips */
34 #if defined(CFG_ENV_IS_IN_FLASH)
36 # define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
39 # define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
41 # ifndef CFG_ENV_SECT_SIZE
42 # define CFG_ENV_SECT_SIZE CFG_ENV_SIZE
46 /*-----------------------------------------------------------------------
49 static int write_word (flash_info_t
* info
, ulong dest
, ulong data
);
52 static void flash_get_offsets (ulong base
, flash_info_t
* info
);
55 /*flash command address offsets*/
67 #define FLASH_WORD_SIZE unsigned char
69 /*-----------------------------------------------------------------------
73 static int byte_parity_odd (unsigned char x
) __attribute__ ((const));
75 static unsigned long flash_id (unsigned char mfct
, unsigned char chip
)
76 __attribute__ ((const));
79 FLASH_WORD_SIZE extval
;
80 unsigned short intval
;
84 static int byte_parity_odd (unsigned char x
)
89 return (x
& 0x1) != 0;
94 static unsigned long flash_id (unsigned char mfct
, unsigned char chip
)
96 static const map_entry mfct_map
[] = {
97 {(FLASH_WORD_SIZE
) AMD_MANUFACT
,
98 (unsigned short) ((unsigned long) FLASH_MAN_AMD
>> 16)},
99 {(FLASH_WORD_SIZE
) FUJ_MANUFACT
,
100 (unsigned short) ((unsigned long) FLASH_MAN_FUJ
>> 16)},
101 {(FLASH_WORD_SIZE
) STM_MANUFACT
,
102 (unsigned short) ((unsigned long) FLASH_MAN_STM
>> 16)},
103 {(FLASH_WORD_SIZE
) MT_MANUFACT
,
104 (unsigned short) ((unsigned long) FLASH_MAN_MT
>> 16)},
105 {(FLASH_WORD_SIZE
) INTEL_MANUFACT
,
106 (unsigned short) ((unsigned long) FLASH_MAN_INTEL
>> 16)},
107 {(FLASH_WORD_SIZE
) INTEL_ALT_MANU
,
108 (unsigned short) ((unsigned long) FLASH_MAN_INTEL
>> 16)}
111 static const map_entry chip_map
[] = {
112 {AMD_ID_F040B
, FLASH_AM040
},
113 {(FLASH_WORD_SIZE
) STM_ID_x800AB
, FLASH_STM800AB
}
117 unsigned long result
= FLASH_UNKNOWN
;
120 for (p
= &chip_map
[0];
121 p
< &chip_map
[sizeof chip_map
/ sizeof chip_map
[0]]; p
++)
122 if (p
->extval
== chip
) {
123 result
= FLASH_VENDMASK
| p
->intval
;
128 for (p
= &mfct_map
[0];
129 p
< &mfct_map
[sizeof mfct_map
/ sizeof mfct_map
[0]]; p
++)
130 if (p
->extval
== mfct
) {
131 result
&= ~FLASH_VENDMASK
;
132 result
|= (unsigned long) p
->intval
<< 16;
140 unsigned long flash_init (void)
144 static const ulong flash_banks
[] = CFG_FLASH_BANKS
;
146 /* Init: no FLASHes known */
147 for (i
= 0; i
< CFG_MAX_FLASH_BANKS
; i
++) {
148 flash_info_t
*const pflinfo
= &flash_info
[i
];
150 pflinfo
->flash_id
= FLASH_UNKNOWN
;
152 pflinfo
->sector_count
= 0;
155 for (i
= 0; i
< sizeof flash_banks
/ sizeof flash_banks
[0]; i
++) {
156 flash_info_t
*const pflinfo
= &flash_info
[i
];
157 const unsigned long base_address
= flash_banks
[i
];
158 volatile FLASH_WORD_SIZE
*const flash
=
159 (FLASH_WORD_SIZE
*) base_address
;
161 volatile FLASH_WORD_SIZE
*addr2
;
164 /* write autoselect sequence */
165 flash
[0x5555] = 0xaa;
166 flash
[0x2aaa] = 0x55;
167 flash
[0x5555] = 0x90;
169 flash
[0xAAA << (3 * i
)] = 0xaa;
170 flash
[0x555 << (3 * i
)] = 0x55;
171 flash
[0xAAA << (3 * i
)] = 0x90;
173 __asm__
__volatile__ ("sync");
176 pflinfo
->flash_id
= flash_id (flash
[0x0], flash
[0x1]);
179 flash_id (flash
[0x0], flash
[0x2 + 14 * i
]);
182 switch (pflinfo
->flash_id
& FLASH_TYPEMASK
) {
184 pflinfo
->size
= 0x00080000;
185 pflinfo
->sector_count
= 8;
186 for (j
= 0; j
< 8; j
++) {
188 base_address
+ 0x00010000 * j
;
189 pflinfo
->protect
[j
] = flash
[(j
<< 16) | 0x2];
193 pflinfo
->size
= 0x00100000;
194 pflinfo
->sector_count
= 19;
195 pflinfo
->start
[0] = base_address
;
196 pflinfo
->start
[1] = base_address
+ 0x4000;
197 pflinfo
->start
[2] = base_address
+ 0x6000;
198 pflinfo
->start
[3] = base_address
+ 0x8000;
199 for (j
= 1; j
< 16; j
++) {
200 pflinfo
->start
[j
+ 3] =
201 base_address
+ 0x00010000 * j
;
204 /* check for protected sectors */
205 for (j
= 0; j
< pflinfo
->sector_count
; j
++) {
206 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
207 /* D0 = 1 if protected */
208 addr2
= (volatile FLASH_WORD_SIZE
209 *) (pflinfo
->start
[j
]);
210 if (pflinfo
->flash_id
& FLASH_MAN_SST
)
211 pflinfo
->protect
[j
] = 0;
213 pflinfo
->protect
[j
] = addr2
[2] & 1;
218 /* Protect monitor and environment sectors
220 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
221 flash_protect (FLAG_PROTECT_SET
,
223 CFG_MONITOR_BASE
+ monitor_flash_len
- 1,
227 #if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
228 flash_protect (FLAG_PROTECT_SET
,
230 CFG_ENV_ADDR
+ CFG_ENV_SIZE
- 1,
234 /* reset device to read mode */
235 flash
[0x0000] = 0xf0;
236 __asm__
__volatile__ ("sync");
239 return flash_info
[0].size
+ flash_info
[1].size
;
243 static void flash_get_offsets (ulong base
, flash_info_t
* info
)
247 /* set up sector start address table */
248 if (info
->flash_id
& FLASH_MAN_SST
) {
249 for (i
= 0; i
< info
->sector_count
; i
++)
250 info
->start
[i
] = base
+ (i
* 0x00010000);
251 } else if (info
->flash_id
& FLASH_BTYPE
) {
252 /* set sector offsets for bottom boot block type */
253 info
->start
[0] = base
+ 0x00000000;
254 info
->start
[1] = base
+ 0x00004000;
255 info
->start
[2] = base
+ 0x00006000;
256 info
->start
[3] = base
+ 0x00008000;
257 for (i
= 4; i
< info
->sector_count
; i
++) {
258 info
->start
[i
] = base
+ (i
* 0x00010000) - 0x00030000;
261 /* set sector offsets for top boot block type */
262 i
= info
->sector_count
- 1;
263 info
->start
[i
--] = base
+ info
->size
- 0x00004000;
264 info
->start
[i
--] = base
+ info
->size
- 0x00006000;
265 info
->start
[i
--] = base
+ info
->size
- 0x00008000;
266 for (; i
>= 0; i
--) {
267 info
->start
[i
] = base
+ i
* 0x00010000;
274 /*-----------------------------------------------------------------------
276 void flash_print_info (flash_info_t
* info
)
278 static const char unk
[] = "Unknown";
279 const char *mfct
= unk
, *type
= unk
;
282 if (info
->flash_id
!= FLASH_UNKNOWN
) {
283 switch (info
->flash_id
& FLASH_VENDMASK
) {
297 mfct
= "Bright Microelectonics";
299 case FLASH_MAN_INTEL
:
304 switch (info
->flash_id
& FLASH_TYPEMASK
) {
306 type
= "AM29F040B (512K * 8, uniform sector size)";
309 type
= "AM29LV400B (4 Mbit, bottom boot sect)";
312 type
= "AM29LV400T (4 Mbit, top boot sector)";
315 type
= "AM29LV800B (8 Mbit, bottom boot sect)";
318 type
= "AM29LV800T (8 Mbit, top boot sector)";
321 type
= "AM29LV160T (16 Mbit, top boot sector)";
324 type
= "AM29LV320B (32 Mbit, bottom boot sect)";
327 type
= "AM29LV320T (32 Mbit, top boot sector)";
330 type
= "M29W800AB (8 Mbit, bottom boot sect)";
333 type
= "SST39LF/VF800 (8 Mbit, uniform sector size)";
336 type
= "SST39LF/VF160 (16 Mbit, uniform sector size)";
341 printf ("\n Brand: %s Type: %s\n"
342 " Size: %lu KB in %d Sectors\n",
343 mfct
, type
, info
->size
>> 10, info
->sector_count
);
345 printf (" Sector Start Addresses:");
347 for (i
= 0; i
< info
->sector_count
; i
++) {
350 unsigned long *flash
= (unsigned long *) info
->start
[i
];
353 * Check if whole sector is erased
355 size
= (i
!= (info
->sector_count
- 1)) ?
356 (info
->start
[i
+ 1] - info
->start
[i
]) >> 2 :
357 (info
->start
[0] + info
->size
- info
->start
[i
]) >> 2;
359 for (flash
= (unsigned long *) info
->start
[i
], erased
= 1;
360 (flash
!= (unsigned long *) info
->start
[i
] + size
)
362 erased
= *flash
== ~0x0UL
;
364 printf ("%s %08lX %s %s",
365 (i
% 5) ? "" : "\n ",
367 erased
? "E" : " ", info
->protect
[i
] ? "RO" : " ");
377 * The following code cannot be run from FLASH!
379 ulong
flash_get_size (vu_long
* addr
, flash_info_t
* info
)
382 FLASH_WORD_SIZE value
;
383 ulong base
= (ulong
) addr
;
384 volatile FLASH_WORD_SIZE
*addr2
= (FLASH_WORD_SIZE
*) addr
;
386 printf ("flash_get_size: \n");
387 /* Write auto select command: read Manufacturer ID */
389 addr2
[ADDR0
] = (FLASH_WORD_SIZE
) 0xAA;
390 addr2
[ADDR1
] = (FLASH_WORD_SIZE
) 0x55;
391 addr2
[ADDR0
] = (FLASH_WORD_SIZE
) 0x90;
395 case (FLASH_WORD_SIZE
) AMD_MANUFACT
:
396 info
->flash_id
= FLASH_MAN_AMD
;
398 case (FLASH_WORD_SIZE
) FUJ_MANUFACT
:
399 info
->flash_id
= FLASH_MAN_FUJ
;
401 case (FLASH_WORD_SIZE
) SST_MANUFACT
:
402 info
->flash_id
= FLASH_MAN_SST
;
405 info
->flash_id
= FLASH_UNKNOWN
;
406 info
->sector_count
= 0;
408 return (0); /* no or unknown flash */
410 printf ("recognised manufacturer");
412 value
= addr2
[ADDR3
]; /* device ID */
413 debug ("\ndev_code=%x\n", value
);
416 case (FLASH_WORD_SIZE
) AMD_ID_LV400T
:
417 info
->flash_id
+= FLASH_AM400T
;
418 info
->sector_count
= 11;
419 info
->size
= 0x00080000;
420 break; /* => 0.5 MB */
422 case (FLASH_WORD_SIZE
) AMD_ID_LV400B
:
423 info
->flash_id
+= FLASH_AM400B
;
424 info
->sector_count
= 11;
425 info
->size
= 0x00080000;
426 break; /* => 0.5 MB */
428 case (FLASH_WORD_SIZE
) AMD_ID_LV800T
:
429 info
->flash_id
+= FLASH_AM800T
;
430 info
->sector_count
= 19;
431 info
->size
= 0x00100000;
434 case (FLASH_WORD_SIZE
) AMD_ID_LV800B
:
435 info
->flash_id
+= FLASH_AM800B
;
436 info
->sector_count
= 19;
437 info
->size
= 0x00100000;
440 case (FLASH_WORD_SIZE
) AMD_ID_LV160T
:
441 info
->flash_id
+= FLASH_AM160T
;
442 info
->sector_count
= 35;
443 info
->size
= 0x00200000;
446 case (FLASH_WORD_SIZE
) AMD_ID_LV160B
:
447 info
->flash_id
+= FLASH_AM160B
;
448 info
->sector_count
= 35;
449 info
->size
= 0x00200000;
452 case (FLASH_WORD_SIZE
) SST_ID_xF800A
:
453 info
->flash_id
+= FLASH_SST800A
;
454 info
->sector_count
= 16;
455 info
->size
= 0x00100000;
458 case (FLASH_WORD_SIZE
) SST_ID_xF160A
:
459 info
->flash_id
+= FLASH_SST160A
;
460 info
->sector_count
= 32;
461 info
->size
= 0x00200000;
464 case (FLASH_WORD_SIZE
) AMD_ID_F040B
:
465 info
->flash_id
+= FLASH_AM040
;
466 info
->sector_count
= 8;
467 info
->size
= 0x00080000;
468 break; /* => 0.5 MB */
471 info
->flash_id
= FLASH_UNKNOWN
;
472 return (0); /* => no or unknown flash */
476 printf ("flash id %lx; sector count %x, size %lx\n", info
->flash_id
,
477 info
->sector_count
, info
->size
);
478 /* set up sector start address table */
479 if (info
->flash_id
& FLASH_MAN_SST
) {
480 for (i
= 0; i
< info
->sector_count
; i
++)
481 info
->start
[i
] = base
+ (i
* 0x00010000);
482 } else if (info
->flash_id
& FLASH_BTYPE
) {
483 /* set sector offsets for bottom boot block type */
484 info
->start
[0] = base
+ 0x00000000;
485 info
->start
[1] = base
+ 0x00004000;
486 info
->start
[2] = base
+ 0x00006000;
487 info
->start
[3] = base
+ 0x00008000;
488 for (i
= 4; i
< info
->sector_count
; i
++) {
489 info
->start
[i
] = base
+ (i
* 0x00010000) - 0x00030000;
492 /* set sector offsets for top boot block type */
493 i
= info
->sector_count
- 1;
494 info
->start
[i
--] = base
+ info
->size
- 0x00004000;
495 info
->start
[i
--] = base
+ info
->size
- 0x00006000;
496 info
->start
[i
--] = base
+ info
->size
- 0x00008000;
497 for (; i
>= 0; i
--) {
498 info
->start
[i
] = base
+ i
* 0x00010000;
502 /* check for protected sectors */
503 for (i
= 0; i
< info
->sector_count
; i
++) {
504 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
505 /* D0 = 1 if protected */
506 addr2
= (volatile FLASH_WORD_SIZE
*) (info
->start
[i
]);
507 if (info
->flash_id
& FLASH_MAN_SST
)
508 info
->protect
[i
] = 0;
510 info
->protect
[i
] = addr2
[2] & 1;
514 * Prevent writes to uninitialized FLASH.
516 if (info
->flash_id
!= FLASH_UNKNOWN
) {
517 addr2
= (FLASH_WORD_SIZE
*) info
->start
[0];
518 *addr2
= (FLASH_WORD_SIZE
) 0x00F000F0; /* reset bank */
527 int flash_erase (flash_info_t
* info
, int s_first
, int s_last
)
529 volatile FLASH_WORD_SIZE
*addr
= (FLASH_WORD_SIZE
*) (info
->start
[0]);
530 int flag
, prot
, sect
, l_sect
;
531 ulong start
, now
, last
;
534 if ((s_first
< 0) || (s_first
> s_last
)) {
535 if (info
->flash_id
== FLASH_UNKNOWN
) {
536 printf ("- missing\n");
538 printf ("- no sectors to erase\n");
543 if ((info
->flash_id
== FLASH_UNKNOWN
) ||
544 (info
->flash_id
> (FLASH_MAN_STM
| FLASH_AMD_COMP
))) {
545 printf ("Can't erase unknown flash type - aborted\n");
550 for (sect
= s_first
; sect
<= s_last
; ++sect
) {
551 if (info
->protect
[sect
]) {
557 printf ("- Warning: %d protected sectors will not be erased!\n", prot
);
564 /* Check the ROM CS */
565 if ((info
->start
[0] >= ROM_CS1_START
)
566 && (info
->start
[0] < ROM_CS0_START
))
571 /* Disable interrupts which might cause a timeout here */
572 flag
= disable_interrupts ();
574 addr
[ADDR0
<< sh8b
] = (FLASH_WORD_SIZE
) 0x00AA00AA;
575 addr
[ADDR1
<< sh8b
] = (FLASH_WORD_SIZE
) 0x00550055;
576 addr
[ADDR0
<< sh8b
] = (FLASH_WORD_SIZE
) 0x00800080;
577 addr
[ADDR0
<< sh8b
] = (FLASH_WORD_SIZE
) 0x00AA00AA;
578 addr
[ADDR1
<< sh8b
] = (FLASH_WORD_SIZE
) 0x00550055;
580 /* Start erase on unprotected sectors */
581 for (sect
= s_first
; sect
<= s_last
; sect
++) {
582 if (info
->protect
[sect
] == 0) { /* not protected */
583 addr
= (FLASH_WORD_SIZE
*) (info
->start
[0] + ((info
->
591 if (info
->flash_id
& FLASH_MAN_SST
) {
592 addr
[ADDR0
<< sh8b
] =
593 (FLASH_WORD_SIZE
) 0x00AA00AA;
594 addr
[ADDR1
<< sh8b
] =
595 (FLASH_WORD_SIZE
) 0x00550055;
596 addr
[ADDR0
<< sh8b
] =
597 (FLASH_WORD_SIZE
) 0x00800080;
598 addr
[ADDR0
<< sh8b
] =
599 (FLASH_WORD_SIZE
) 0x00AA00AA;
600 addr
[ADDR1
<< sh8b
] =
601 (FLASH_WORD_SIZE
) 0x00550055;
602 addr
[0] = (FLASH_WORD_SIZE
) 0x00500050; /* block erase */
603 udelay (30000); /* wait 30 ms */
605 addr
[0] = (FLASH_WORD_SIZE
) 0x00300030; /* sector erase */
610 /* re-enable interrupts if necessary */
612 enable_interrupts ();
614 /* wait at least 80us - let's wait 1 ms */
618 * We wait for the last triggered sector
623 start
= get_timer (0);
625 addr
= (FLASH_WORD_SIZE
*) (info
->start
[0] + ((info
->start
[l_sect
] -
628 while ((addr
[0] & (FLASH_WORD_SIZE
) 0x00800080) !=
629 (FLASH_WORD_SIZE
) 0x00800080) {
630 if ((now
= get_timer (start
)) > CFG_FLASH_ERASE_TOUT
) {
631 printf ("Timeout\n");
634 /* show that we're waiting */
635 if ((now
- last
) > 1000) { /* every second */
642 /* reset to read mode */
643 addr
= (FLASH_WORD_SIZE
*) info
->start
[0];
644 addr
[0] = (FLASH_WORD_SIZE
) 0x00F000F0; /* reset bank */
650 /*-----------------------------------------------------------------------
651 * Copy memory to flash, returns:
654 * 2 - Flash not erased
657 int write_buff (flash_info_t
* info
, uchar
* src
, ulong addr
, ulong cnt
)
662 wp
= (addr
& ~3); /* get lower word aligned address */
665 * handle unaligned start bytes
667 if ((l
= addr
- wp
) != 0) {
669 for (i
= 0, cp
= wp
; i
< l
; ++i
, ++cp
) {
670 data
= (data
<< 8) | (*(uchar
*) cp
);
672 for (; i
< 4 && cnt
> 0; ++i
) {
673 data
= (data
<< 8) | *src
++;
677 for (; cnt
== 0 && i
< 4; ++i
, ++cp
) {
678 data
= (data
<< 8) | (*(uchar
*) cp
);
681 if ((rc
= write_word (info
, wp
, data
)) != 0) {
688 * handle word aligned part
692 for (i
= 0; i
< 4; ++i
) {
693 data
= (data
<< 8) | *src
++;
695 if ((rc
= write_word (info
, wp
, data
)) != 0) {
707 * handle unaligned tail bytes
710 for (i
= 0, cp
= wp
; i
< 4 && cnt
> 0; ++i
, ++cp
) {
711 data
= (data
<< 8) | *src
++;
714 for (; i
< 4; ++i
, ++cp
) {
715 data
= (data
<< 8) | (*(uchar
*) cp
);
718 return (write_word (info
, wp
, data
));
721 /*-----------------------------------------------------------------------
722 * Write a word to Flash, returns:
725 * 2 - Flash not erased
727 static int write_word (flash_info_t
* info
, ulong dest
, ulong data
)
729 volatile FLASH_WORD_SIZE
*addr2
= (FLASH_WORD_SIZE
*) info
->start
[0];
730 volatile FLASH_WORD_SIZE
*dest2
;
731 volatile FLASH_WORD_SIZE
*data2
= (FLASH_WORD_SIZE
*) & data
;
737 /* Check the ROM CS */
738 if ((info
->start
[0] >= ROM_CS1_START
)
739 && (info
->start
[0] < ROM_CS0_START
))
744 dest2
= (FLASH_WORD_SIZE
*) (((dest
- info
->start
[0]) << sh8b
) +
747 /* Check if Flash is (sufficiently) erased */
748 if ((*dest2
& (FLASH_WORD_SIZE
) data
) != (FLASH_WORD_SIZE
) data
) {
751 /* Disable interrupts which might cause a timeout here */
752 flag
= disable_interrupts ();
754 for (i
= 0; i
< 4 / sizeof (FLASH_WORD_SIZE
); i
++) {
755 addr2
[ADDR0
<< sh8b
] = (FLASH_WORD_SIZE
) 0x00AA00AA;
756 addr2
[ADDR1
<< sh8b
] = (FLASH_WORD_SIZE
) 0x00550055;
757 addr2
[ADDR0
<< sh8b
] = (FLASH_WORD_SIZE
) 0x00A000A0;
759 dest2
[i
<< sh8b
] = data2
[i
];
761 /* re-enable interrupts if necessary */
763 enable_interrupts ();
765 /* data polling for D7 */
766 start
= get_timer (0);
767 while ((dest2
[i
<< sh8b
] & (FLASH_WORD_SIZE
) 0x00800080) !=
768 (data2
[i
] & (FLASH_WORD_SIZE
) 0x00800080)) {
769 if (get_timer (start
) > CFG_FLASH_WRITE_TOUT
) {
778 /*-----------------------------------------------------------------------