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git.ipfire.org Git - people/ms/u-boot.git/blob - board/trab/flash.c
3 * Gary Jennejohn, DENX Software Engineering, <gj@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,
27 #include <environment.h>
29 static ulong
flash_get_size (vu_long
*addr
, flash_info_t
*info
);
31 flash_info_t flash_info
[CFG_MAX_FLASH_BANKS
];
34 #define CMD_READ_ARRAY 0x00F000F0
35 #define CMD_UNLOCK1 0x00AA00AA
36 #define CMD_UNLOCK2 0x00550055
37 #define CMD_ERASE_SETUP 0x00800080
38 #define CMD_ERASE_CONFIRM 0x00300030
39 #define CMD_PROGRAM 0x00A000A0
40 #define CMD_UNLOCK_BYPASS 0x00200020
41 #define CMD_READ_MANF_ID 0x00900090
42 #define CMD_UNLOCK_BYPASS_RES1 0x00900090
43 #define CMD_UNLOCK_BYPASS_RES2 0x00000000
45 #define MEM_FLASH_ADDR (*(volatile u32 *)CFG_FLASH_BASE)
46 #define MEM_FLASH_ADDR1 (*(volatile u32 *)(CFG_FLASH_BASE + (0x00000555 << 2)))
47 #define MEM_FLASH_ADDR2 (*(volatile u32 *)(CFG_FLASH_BASE + (0x000002AA << 2)))
49 #define BIT_ERASE_DONE 0x00800080
50 #define BIT_RDY_MASK 0x00800080
51 #define BIT_PROGRAM_ERROR 0x00200020
52 #define BIT_TIMEOUT 0x80000000 /* our flag */
58 /*-----------------------------------------------------------------------
61 ulong
flash_init (void)
66 for (i
=0; i
<CFG_MAX_FLASH_BANKS
; ++i
) {
68 flash_info_t
*info
= &flash_info
[i
];
70 /* Init: no FLASHes known */
71 info
->flash_id
= FLASH_UNKNOWN
;
73 size
+= flash_get_size (CFG_FLASH_BASE
, info
);
76 flashbase
= CFG_FLASH_BASE
;
78 panic ("configured too many flash banks!\n");
79 for (j
= 0; j
< info
->sector_count
; j
++) {
82 info
->start
[j
] = flashbase
;
84 switch (info
->flash_id
& FLASH_TYPEMASK
) {
85 case (FLASH_AM320B
& FLASH_TYPEMASK
):
86 case (FLASH_MXLV320B
& FLASH_TYPEMASK
):
87 /* Boot sector type: 8 x 8 + N x 128 kB */
88 flashbase
+= (j
< 8) ? 0x4000 : 0x20000;
90 case (FLASH_AM640U
& FLASH_TYPEMASK
):
91 /* Uniform sector type: 128 kB */
95 printf ("## Bad flash chip type 0x%04lX\n",
96 info
->flash_id
& FLASH_TYPEMASK
);
102 * Protect monitor and environment sectors
104 flash_protect ( FLAG_PROTECT_SET
,
106 CFG_FLASH_BASE
+ monitor_flash_len
- 1,
109 flash_protect ( FLAG_PROTECT_SET
,
111 CFG_ENV_ADDR
+ CFG_ENV_SIZE
- 1, &flash_info
[0]);
113 #ifdef CFG_ENV_ADDR_REDUND
114 flash_protect ( FLAG_PROTECT_SET
,
116 CFG_ENV_ADDR_REDUND
+ CFG_ENV_SIZE_REDUND
- 1,
123 /*-----------------------------------------------------------------------
125 void flash_print_info (flash_info_t
* info
)
129 switch (info
->flash_id
& FLASH_VENDMASK
) {
130 case (FLASH_MAN_AMD
& FLASH_VENDMASK
):
131 printf ("AMD "); break;
132 case (FLASH_MAN_FUJ
& FLASH_VENDMASK
):
133 printf ("FUJITSU "); break;
134 case (FLASH_MAN_MX
& FLASH_VENDMASK
):
135 printf ("MACRONIX "); break;
136 default: printf ("Unknown Vendor "); break;
139 switch (info
->flash_id
& FLASH_TYPEMASK
) {
140 case (FLASH_AM320B
& FLASH_TYPEMASK
):
141 printf ("2x Am29LV320DB (32Mbit)\n");
143 case (FLASH_MXLV320B
& FLASH_TYPEMASK
):
144 printf ("2x MX29LV320DB (32Mbit)\n");
146 case (FLASH_AM640U
& FLASH_TYPEMASK
):
147 printf ("2x Am29LV640D (64Mbit)\n");
150 printf ("Unknown Chip Type\n");
155 printf (" Size: %ld MB in %d Sectors\n",
156 info
->size
>> 20, info
->sector_count
);
158 printf (" Sector Start Addresses:");
159 for (i
= 0; i
< info
->sector_count
; i
++) {
165 info
->protect
[i
] ? " (RO)" : " ");
172 /*-----------------------------------------------------------------------
175 int flash_erase (flash_info_t
* info
, int s_first
, int s_last
)
182 int iflag
, prot
, sect
;
186 debug ("flash_erase: s_first %d s_last %d\n", s_first
, s_last
);
188 /* first look for protection bits */
190 if (info
->flash_id
== FLASH_UNKNOWN
)
191 return ERR_UNKNOWN_FLASH_TYPE
;
193 if ((s_first
< 0) || (s_first
> s_last
)) {
197 switch (info
->flash_id
& FLASH_VENDMASK
) {
198 case (FLASH_MAN_AMD
& FLASH_VENDMASK
): break; /* OK */
199 case (FLASH_MAN_FUJ
& FLASH_VENDMASK
): break; /* OK */
200 case (FLASH_MAN_MX
& FLASH_VENDMASK
): break; /* OK */
202 debug ("## flash_erase: unknown manufacturer\n");
203 return (ERR_UNKNOWN_FLASH_VENDOR
);
207 for (sect
= s_first
; sect
<= s_last
; ++sect
) {
208 if (info
->protect
[sect
]) {
214 printf ("- Warning: %d protected sectors will not be erased!\n",
221 * Disable interrupts which might cause a timeout
222 * here. Remember that our exception vectors are
223 * at address 0 in the flash, and we don't want a
224 * (ticker) exception to happen while the flash
225 * chip is in programming mode.
228 cflag
= icache_status ();
231 iflag
= disable_interrupts ();
233 /* Start erase on unprotected sectors */
234 for (sect
= s_first
; sect
<= s_last
&& !ctrlc (); sect
++) {
236 debug ("Erasing sector %2d @ %08lX... ",
237 sect
, info
->start
[sect
]);
239 /* arm simple, non interrupt dependent timer */
240 reset_timer_masked ();
242 if (info
->protect
[sect
] == 0) { /* not protected */
243 vu_long
*addr
= (vu_long
*) (info
->start
[sect
]);
245 MEM_FLASH_ADDR1
= CMD_UNLOCK1
;
246 MEM_FLASH_ADDR2
= CMD_UNLOCK2
;
247 MEM_FLASH_ADDR1
= CMD_ERASE_SETUP
;
249 MEM_FLASH_ADDR1
= CMD_UNLOCK1
;
250 MEM_FLASH_ADDR2
= CMD_UNLOCK2
;
251 *addr
= CMD_ERASE_CONFIRM
;
253 /* wait until flash is ready */
260 if (get_timer_masked () > CFG_FLASH_ERASE_TOUT
) {
261 MEM_FLASH_ADDR1
= CMD_READ_ARRAY
;
266 if (!chip1
&& (result
& 0xFFFF) & BIT_ERASE_DONE
)
269 if (!chip1
&& (result
& 0xFFFF) & BIT_PROGRAM_ERROR
)
272 if (!chip2
&& (result
>> 16) & BIT_ERASE_DONE
)
275 if (!chip2
&& (result
>> 16) & BIT_PROGRAM_ERROR
)
278 } while (!chip1
|| !chip2
);
280 MEM_FLASH_ADDR1
= CMD_READ_ARRAY
;
282 if (chip1
== ERR
|| chip2
== ERR
) {
284 printf ("Flash erase error\n");
289 printf ("Flash erase timeout error\n");
296 /* allow flash to settle - wait 10 ms */
297 udelay_masked (10000);
300 enable_interrupts ();
309 /*-----------------------------------------------------------------------
310 * Copy memory to flash
313 static int write_word (flash_info_t
* info
, ulong dest
, ulong data
)
315 vu_long
*addr
= (vu_long
*) dest
;
326 * Check if Flash is (sufficiently) erased
329 if ((result
& data
) != data
)
330 return ERR_NOT_ERASED
;
333 * Disable interrupts which might cause a timeout
334 * here. Remember that our exception vectors are
335 * at address 0 in the flash, and we don't want a
336 * (ticker) exception to happen while the flash
337 * chip is in programming mode.
340 cflag
= icache_status ();
343 iflag
= disable_interrupts ();
345 MEM_FLASH_ADDR1
= CMD_UNLOCK1
;
346 MEM_FLASH_ADDR2
= CMD_UNLOCK2
;
347 MEM_FLASH_ADDR1
= CMD_PROGRAM
;
350 /* arm simple, non interrupt dependent timer */
351 reset_timer_masked ();
353 /* wait until flash is ready */
359 if (get_timer_masked () > CFG_FLASH_WRITE_TOUT
) {
363 if (!chip1
&& ((result
& 0x80) == (data
& 0x80)))
366 if (!chip1
&& ((result
& 0xFFFF) & BIT_PROGRAM_ERROR
)) {
369 if ((result
& 0x80) == (data
& 0x80))
375 if (!chip2
&& ((result
& (0x80 << 16)) == (data
& (0x80 << 16))))
378 if (!chip2
&& ((result
>> 16) & BIT_PROGRAM_ERROR
)) {
381 if ((result
& (0x80 << 16)) == (data
& (0x80 << 16)))
387 } while (!chip1
|| !chip2
);
389 *addr
= CMD_READ_ARRAY
;
391 if (chip1
== ERR
|| chip2
== ERR
|| *addr
!= data
) {
393 printf ("Flash program error\n");
394 debug ("chip1: %#x, chip2: %#x, addr: %#lx *addr: %#lx, "
396 chip1
, chip2
, addr
, *addr
, data
);
400 enable_interrupts ();
410 /*-----------------------------------------------------------------------
411 * Copy memory to flash.
414 int write_buff (flash_info_t
* info
, uchar
* src
, ulong addr
, ulong cnt
)
420 wp
= (addr
& ~3); /* get lower word aligned address */
423 * handle unaligned start bytes
425 if ((l
= addr
- wp
) != 0) {
427 for (i
= 0, cp
= wp
; i
< l
; ++i
, ++cp
) {
428 data
= (data
>> 8) | (*(uchar
*) cp
<< 24);
430 for (; i
< 4 && cnt
> 0; ++i
) {
431 data
= (data
>> 8) | (*src
++ << 24);
435 for (; cnt
== 0 && i
< 4; ++i
, ++cp
) {
436 data
= (data
>> 8) | (*(uchar
*) cp
<< 24);
439 if ((rc
= write_word (info
, wp
, data
)) != 0) {
446 * handle word aligned part
449 if (((ulong
)src
) & 0x3) {
450 for (i
= 0; i
< 4; i
++) {
451 ((char *)&data
)[i
] = ((vu_char
*)src
)[i
];
455 data
= *((vu_long
*) src
);
458 if ((rc
= write_word (info
, wp
, data
)) != 0) {
472 * handle unaligned tail bytes
475 for (i
= 0, cp
= wp
; i
< 4 && cnt
> 0; ++i
, ++cp
) {
476 data
= (data
>> 8) | (*src
++ << 24);
479 for (; i
< 4; ++i
, ++cp
) {
480 data
= (data
>> 8) | (*(uchar
*) cp
<< 24);
483 rc
= write_word (info
, wp
, data
);
490 /*-----------------------------------------------------------------------
493 static ulong
flash_get_size (vu_long
*addr
, flash_info_t
*info
)
497 /* Write auto select command sequence and read Manufacturer ID */
498 addr
[0x0555] = CMD_UNLOCK1
;
499 addr
[0x02AA] = CMD_UNLOCK2
;
500 addr
[0x0555] = CMD_READ_MANF_ID
;
504 debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong
)addr
, value
);
508 info
->flash_id
= FLASH_MAN_AMD
;
511 info
->flash_id
= FLASH_MAN_FUJ
;
514 info
->flash_id
= FLASH_MAN_MX
;
517 info
->flash_id
= FLASH_UNKNOWN
;
518 info
->sector_count
= 0;
520 addr
[0] = CMD_READ_ARRAY
; /* restore read mode */
521 debug ("## flash_init: unknown manufacturer\n");
522 return (0); /* no or unknown flash */
525 value
= addr
[1]; /* device ID */
527 debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong
)(&addr
[1]), value
);
531 info
->flash_id
+= FLASH_AM320B
;
532 info
->sector_count
= 71;
533 info
->size
= 0x00800000;
535 addr
[0] = CMD_READ_ARRAY
; /* restore read mode */
539 info
->flash_id
+= FLASH_AM640U
;
540 info
->sector_count
= 128;
541 info
->size
= 0x01000000;
543 addr
[0] = CMD_READ_ARRAY
; /* restore read mode */
544 break; /* => 16 MB */
547 info
->flash_id
+= FLASH_MXLV320B
;
548 info
->sector_count
= 71;
549 info
->size
= 0x00800000;
551 addr
[0] = CMD_READ_ARRAY
; /* restore read mode */
555 debug ("## flash_init: unknown flash chip\n");
556 info
->flash_id
= FLASH_UNKNOWN
;
557 addr
[0] = CMD_READ_ARRAY
; /* restore read mode */
558 return (0); /* => no or unknown flash */
562 if (info
->sector_count
> CFG_MAX_FLASH_SECT
) {
563 printf ("** ERROR: sector count %d > max (%d) **\n",
564 info
->sector_count
, CFG_MAX_FLASH_SECT
);
565 info
->sector_count
= CFG_MAX_FLASH_SECT
;