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git.ipfire.org Git - people/ms/u-boot.git/blob - board/siemens/CCM/flash.c
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,
27 flash_info_t flash_info
[CFG_MAX_FLASH_BANKS
]; /* info for FLASH chips */
29 /*-----------------------------------------------------------------------
32 static ulong
flash_get_size (vu_long
*addr
, flash_info_t
*info
);
33 static int write_word (flash_info_t
*info
, ulong dest
, ulong data
);
34 static void flash_get_offsets (ulong base
, flash_info_t
*info
);
36 /*-----------------------------------------------------------------------
39 unsigned long flash_init (void)
41 volatile immap_t
*immap
= (immap_t
*)CFG_IMMR
;
42 volatile memctl8xx_t
*memctl
= &immap
->im_memctl
;
43 unsigned long size_b0
, size_b1
;
46 /* Init: no FLASHes known */
47 for (i
=0; i
<CFG_MAX_FLASH_BANKS
; ++i
) {
48 flash_info
[i
].flash_id
= FLASH_UNKNOWN
;
51 /* Static FLASH Bank configuration here - FIXME XXX */
53 size_b0
= flash_get_size((vu_long
*)FLASH_BASE0_PRELIM
, &flash_info
[0]);
55 if (flash_info
[0].flash_id
== FLASH_UNKNOWN
) {
56 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
57 size_b0
, size_b0
<<20);
60 size_b1
= flash_get_size((vu_long
*)FLASH_BASE1_PRELIM
, &flash_info
[1]);
62 if (size_b1
> size_b0
) {
64 "Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
68 flash_info
[0].flash_id
= FLASH_UNKNOWN
;
69 flash_info
[1].flash_id
= FLASH_UNKNOWN
;
70 flash_info
[0].sector_count
= -1;
71 flash_info
[1].sector_count
= -1;
72 flash_info
[0].size
= 0;
73 flash_info
[1].size
= 0;
77 /* Remap FLASH according to real size */
78 memctl
->memc_or0
= CFG_OR_TIMING_FLASH
| (-size_b0
& 0xFFFF8000);
79 memctl
->memc_br0
= (CFG_FLASH_BASE
& BR_BA_MSK
) | BR_MS_GPCM
| BR_V
;
81 /* Re-do sizing to get full correct info */
82 size_b0
= flash_get_size((vu_long
*)CFG_FLASH_BASE
, &flash_info
[0]);
84 flash_get_offsets (CFG_FLASH_BASE
, &flash_info
[0]);
86 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
87 /* monitor protection ON by default */
88 flash_protect(FLAG_PROTECT_SET
,
90 CFG_MONITOR_BASE
+CFG_MONITOR_LEN
-1,
95 memctl
->memc_or1
= CFG_OR_TIMING_FLASH
| (-size_b1
& 0xFFFF8000);
96 memctl
->memc_br1
= ((CFG_FLASH_BASE
+ size_b0
) & BR_BA_MSK
) |
99 /* Re-do sizing to get full correct info */
100 size_b1
= flash_get_size((vu_long
*)(CFG_FLASH_BASE
+ size_b0
),
103 flash_get_offsets (CFG_FLASH_BASE
+ size_b0
, &flash_info
[1]);
105 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
106 /* monitor protection ON by default */
107 flash_protect(FLAG_PROTECT_SET
,
109 CFG_MONITOR_BASE
+CFG_MONITOR_LEN
-1,
113 memctl
->memc_br1
= 0; /* invalidate bank */
115 flash_info
[1].flash_id
= FLASH_UNKNOWN
;
116 flash_info
[1].sector_count
= -1;
119 flash_info
[0].size
= size_b0
;
120 flash_info
[1].size
= size_b1
;
122 return (size_b0
+ size_b1
);
125 /*-----------------------------------------------------------------------
127 static void flash_get_offsets (ulong base
, flash_info_t
*info
)
131 /* set up sector start address table */
132 if (info
->flash_id
& FLASH_BTYPE
) {
133 /* set sector offsets for bottom boot block type */
134 info
->start
[0] = base
+ 0x00000000;
135 info
->start
[1] = base
+ 0x00008000;
136 info
->start
[2] = base
+ 0x0000C000;
137 info
->start
[3] = base
+ 0x00010000;
138 for (i
= 4; i
< info
->sector_count
; i
++) {
139 info
->start
[i
] = base
+ (i
* 0x00020000) - 0x00060000;
142 /* set sector offsets for top boot block type */
143 i
= info
->sector_count
- 1;
144 info
->start
[i
--] = base
+ info
->size
- 0x00008000;
145 info
->start
[i
--] = base
+ info
->size
- 0x0000C000;
146 info
->start
[i
--] = base
+ info
->size
- 0x00010000;
147 for (; i
>= 0; i
--) {
148 info
->start
[i
] = base
+ i
* 0x00020000;
154 /*-----------------------------------------------------------------------
156 void flash_print_info (flash_info_t
*info
)
160 if (info
->flash_id
== FLASH_UNKNOWN
) {
161 printf ("missing or unknown FLASH type\n");
165 switch (info
->flash_id
& FLASH_VENDMASK
) {
166 case FLASH_MAN_AMD
: printf ("AMD "); break;
167 case FLASH_MAN_FUJ
: printf ("FUJITSU "); break;
168 default: printf ("Unknown Vendor "); break;
171 switch (info
->flash_id
& FLASH_TYPEMASK
) {
172 case FLASH_AM400B
: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
174 case FLASH_AM400T
: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
176 case FLASH_AM800B
: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
178 case FLASH_AM800T
: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
180 case FLASH_AM160B
: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
182 case FLASH_AM160T
: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
184 case FLASH_AM320B
: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
186 case FLASH_AM320T
: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
188 default: printf ("Unknown Chip Type\n");
192 printf (" Size: %ld MB in %d Sectors\n",
193 info
->size
>> 20, info
->sector_count
);
195 printf (" Sector Start Addresses:");
196 for (i
=0; i
<info
->sector_count
; ++i
) {
201 info
->protect
[i
] ? " (RO)" : " "
208 /*-----------------------------------------------------------------------
212 /*-----------------------------------------------------------------------
216 * The following code cannot be run from FLASH!
219 static ulong
flash_get_size (vu_long
*addr
, flash_info_t
*info
)
223 ulong base
= (ulong
)addr
;
226 /* Write auto select command: read Manufacturer ID */
227 addr
[0x0555] = 0x00AA00AA;
228 addr
[0x02AA] = 0x00550055;
229 addr
[0x0555] = 0x00900090;
235 info
->flash_id
= FLASH_MAN_AMD
;
238 info
->flash_id
= FLASH_MAN_FUJ
;
241 info
->flash_id
= FLASH_UNKNOWN
;
242 info
->sector_count
= 0;
244 return (0); /* no or unknown flash */
247 value
= addr
[1]; /* device ID */
251 info
->flash_id
+= FLASH_AM400T
;
252 info
->sector_count
= 11;
253 info
->size
= 0x00100000;
257 info
->flash_id
+= FLASH_AM400B
;
258 info
->sector_count
= 11;
259 info
->size
= 0x00100000;
263 info
->flash_id
+= FLASH_AM800T
;
264 info
->sector_count
= 19;
265 info
->size
= 0x00200000;
269 info
->flash_id
+= FLASH_AM800B
;
270 info
->sector_count
= 19;
271 info
->size
= 0x00200000;
275 info
->flash_id
+= FLASH_AM160T
;
276 info
->sector_count
= 35;
277 info
->size
= 0x00400000;
281 info
->flash_id
+= FLASH_AM160B
;
282 info
->sector_count
= 35;
283 info
->size
= 0x00400000;
285 #if 0 /* enable when device IDs are available */
287 info
->flash_id
+= FLASH_AM320T
;
288 info
->sector_count
= 67;
289 info
->size
= 0x00800000;
293 info
->flash_id
+= FLASH_AM320B
;
294 info
->sector_count
= 67;
295 info
->size
= 0x00800000;
299 info
->flash_id
= FLASH_UNKNOWN
;
300 return (0); /* => no or unknown flash */
304 /* set up sector start address table */
305 if (info
->flash_id
& FLASH_BTYPE
) {
306 /* set sector offsets for bottom boot block type */
307 info
->start
[0] = base
+ 0x00000000;
308 info
->start
[1] = base
+ 0x00008000;
309 info
->start
[2] = base
+ 0x0000C000;
310 info
->start
[3] = base
+ 0x00010000;
311 for (i
= 4; i
< info
->sector_count
; i
++) {
312 info
->start
[i
] = base
+ (i
* 0x00020000) - 0x00060000;
315 /* set sector offsets for top boot block type */
316 i
= info
->sector_count
- 1;
317 info
->start
[i
--] = base
+ info
->size
- 0x00008000;
318 info
->start
[i
--] = base
+ info
->size
- 0x0000C000;
319 info
->start
[i
--] = base
+ info
->size
- 0x00010000;
320 for (; i
>= 0; i
--) {
321 info
->start
[i
] = base
+ i
* 0x00020000;
325 /* check for protected sectors */
326 for (i
= 0; i
< info
->sector_count
; i
++) {
327 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
328 /* D0 = 1 if protected */
329 addr
= (volatile unsigned long *)(info
->start
[i
]);
330 info
->protect
[i
] = addr
[2] & 1;
334 * Prevent writes to uninitialized FLASH.
336 if (info
->flash_id
!= FLASH_UNKNOWN
) {
337 addr
= (volatile unsigned long *)info
->start
[0];
339 *addr
= 0x00F000F0; /* reset bank */
346 /*-----------------------------------------------------------------------
349 int flash_erase (flash_info_t
*info
, int s_first
, int s_last
)
351 vu_long
*addr
= (vu_long
*)(info
->start
[0]);
352 int flag
, prot
, sect
, l_sect
;
353 ulong start
, now
, last
;
355 if ((s_first
< 0) || (s_first
> s_last
)) {
356 if (info
->flash_id
== FLASH_UNKNOWN
) {
357 printf ("- missing\n");
359 printf ("- no sectors to erase\n");
364 if ((info
->flash_id
== FLASH_UNKNOWN
) ||
365 (info
->flash_id
> FLASH_AMD_COMP
)) {
366 printf ("Can't erase unknown flash type %08lx - aborted\n",
372 for (sect
=s_first
; sect
<=s_last
; ++sect
) {
373 if (info
->protect
[sect
]) {
379 printf ("- Warning: %d protected sectors will not be erased!\n",
387 /* Disable interrupts which might cause a timeout here */
388 flag
= disable_interrupts();
390 addr
[0x0555] = 0x00AA00AA;
391 addr
[0x02AA] = 0x00550055;
392 addr
[0x0555] = 0x00800080;
393 addr
[0x0555] = 0x00AA00AA;
394 addr
[0x02AA] = 0x00550055;
396 /* Start erase on unprotected sectors */
397 for (sect
= s_first
; sect
<=s_last
; sect
++) {
398 if (info
->protect
[sect
] == 0) { /* not protected */
399 addr
= (vu_long
*)(info
->start
[sect
]);
400 addr
[0] = 0x00300030;
405 /* re-enable interrupts if necessary */
409 /* wait at least 80us - let's wait 1 ms */
413 * We wait for the last triggered sector
418 start
= get_timer (0);
420 addr
= (vu_long
*)(info
->start
[l_sect
]);
421 while ((addr
[0] & 0x00800080) != 0x00800080) {
422 if ((now
= get_timer(start
)) > CFG_FLASH_ERASE_TOUT
) {
423 printf ("Timeout\n");
426 /* show that we're waiting */
427 if ((now
- last
) > 1000) { /* every second */
434 /* reset to read mode */
435 addr
= (volatile unsigned long *)info
->start
[0];
436 addr
[0] = 0x00F000F0; /* reset bank */
442 /*-----------------------------------------------------------------------
443 * Copy memory to flash, returns:
446 * 2 - Flash not erased
449 int write_buff (flash_info_t
*info
, uchar
*src
, ulong addr
, ulong cnt
)
454 wp
= (addr
& ~3); /* get lower word aligned address */
457 * handle unaligned start bytes
459 if ((l
= addr
- wp
) != 0) {
461 for (i
=0, cp
=wp
; i
<l
; ++i
, ++cp
) {
462 data
= (data
<< 8) | (*(uchar
*)cp
);
464 for (; i
<4 && cnt
>0; ++i
) {
465 data
= (data
<< 8) | *src
++;
469 for (; cnt
==0 && i
<4; ++i
, ++cp
) {
470 data
= (data
<< 8) | (*(uchar
*)cp
);
473 if ((rc
= write_word(info
, wp
, data
)) != 0) {
480 * handle word aligned part
484 for (i
=0; i
<4; ++i
) {
485 data
= (data
<< 8) | *src
++;
487 if ((rc
= write_word(info
, wp
, data
)) != 0) {
499 * handle unaligned tail bytes
502 for (i
=0, cp
=wp
; i
<4 && cnt
>0; ++i
, ++cp
) {
503 data
= (data
<< 8) | *src
++;
506 for (; i
<4; ++i
, ++cp
) {
507 data
= (data
<< 8) | (*(uchar
*)cp
);
510 return (write_word(info
, wp
, data
));
513 /*-----------------------------------------------------------------------
514 * Write a word to Flash, returns:
517 * 2 - Flash not erased
519 static int write_word (flash_info_t
*info
, ulong dest
, ulong data
)
521 vu_long
*addr
= (vu_long
*)(info
->start
[0]);
525 /* Check if Flash is (sufficiently) erased */
526 if ((*((vu_long
*)dest
) & data
) != data
) {
529 /* Disable interrupts which might cause a timeout here */
530 flag
= disable_interrupts();
532 addr
[0x0555] = 0x00AA00AA;
533 addr
[0x02AA] = 0x00550055;
534 addr
[0x0555] = 0x00A000A0;
536 *((vu_long
*)dest
) = data
;
538 /* re-enable interrupts if necessary */
542 /* data polling for D7 */
543 start
= get_timer (0);
544 while ((*((vu_long
*)dest
) & 0x00800080) != (data
& 0x00800080)) {
545 if (get_timer(start
) > CFG_FLASH_WRITE_TOUT
) {
552 /*-----------------------------------------------------------------------