]>
git.ipfire.org Git - people/ms/u-boot.git/blob - board/pcippc2/flash.c
3 * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
32 /*---------------------------------------------------------------------*/
36 #define DEBUGF(fmt,args...) printf(fmt ,##args)
38 #define DEBUGF(fmt,args...)
40 /*---------------------------------------------------------------------*/
42 flash_info_t flash_info
[CFG_MAX_FLASH_BANKS
];
44 static ulong
flash_get_size (ulong addr
, flash_info_t
*info
);
45 static int flash_get_offsets (ulong base
, flash_info_t
*info
);
46 static int write_word (flash_info_t
*info
, ulong dest
, ulong data
);
47 static void flash_reset (ulong addr
);
49 unsigned long flash_init (void)
52 unsigned long flash_size
= 0;
54 /* Init: no FLASHes known */
55 for (i
=0; i
<CFG_MAX_FLASH_BANKS
; ++i
) {
56 flash_info
[i
].flash_id
= FLASH_UNKNOWN
;
57 flash_info
[i
].sector_count
= 0;
58 flash_info
[i
].size
= 0;
61 DEBUGF("\n## Get flash size @ 0x%08x\n", CFG_FLASH_BASE
);
63 flash_size
= flash_get_size (CFG_FLASH_BASE
, flash_info
);
65 DEBUGF("## Flash bank size: %08lx\n", flash_size
);
68 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE && \
69 CFG_MONITOR_BASE < CFG_FLASH_BASE + CFG_FLASH_MAX_SIZE
70 /* monitor protection ON by default */
71 flash_protect(FLAG_PROTECT_SET
,
73 CFG_MONITOR_BASE
+ monitor_flash_len
- 1,
77 #ifdef CONFIG_ENV_IS_IN_FLASH
78 /* ENV protection ON by default */
79 flash_protect(FLAG_PROTECT_SET
,
81 CFG_ENV_ADDR
+ CFG_ENV_SECT_SIZE
- 1,
86 puts ("Warning: the BOOT Flash is not initialised !");
93 * The following code cannot be run from FLASH!
95 static ulong
flash_get_size (ulong addr
, flash_info_t
*info
)
100 /* Write auto select command: read Manufacturer ID */
101 out8(addr
+ 0x0555, 0xAA);
103 out8(addr
+ 0x02AA, 0x55);
105 out8(addr
+ 0x0555, 0x90);
111 DEBUGF("Manuf. ID @ 0x%08lx: 0x%08x\n", (ulong
)addr
, value
);
113 switch (value
| (value
<< 16)) {
115 info
->flash_id
= FLASH_MAN_AMD
;
119 info
->flash_id
= FLASH_MAN_FUJ
;
123 info
->flash_id
= FLASH_MAN_STM
;
127 info
->flash_id
= FLASH_UNKNOWN
;
128 info
->sector_count
= 0;
134 value
= in8(addr
+ 1); /* device ID */
137 DEBUGF("Device ID @ 0x%08lx: 0x%08x\n", addr
+1, value
);
139 switch ((ulong
)value
) {
141 DEBUGF("Am29F040B\n");
142 info
->flash_id
+= FLASH_AM040
;
143 info
->sector_count
= 8;
144 info
->size
= 0x00080000;
145 break; /* => 512 kB */
148 DEBUGF("Am29LV040B\n");
149 info
->flash_id
+= FLASH_AM040
;
150 info
->sector_count
= 8;
151 info
->size
= 0x00080000;
152 break; /* => 512 kB */
155 DEBUGF("Am29LV400T\n");
156 info
->flash_id
+= FLASH_AM400T
;
157 info
->sector_count
= 11;
158 info
->size
= 0x00100000;
162 DEBUGF("Am29LV400B\n");
163 info
->flash_id
+= FLASH_AM400B
;
164 info
->sector_count
= 11;
165 info
->size
= 0x00100000;
169 DEBUGF("Am29LV800T\n");
170 info
->flash_id
+= FLASH_AM800T
;
171 info
->sector_count
= 19;
172 info
->size
= 0x00200000;
176 DEBUGF("Am29LV400B\n");
177 info
->flash_id
+= FLASH_AM800B
;
178 info
->sector_count
= 19;
179 info
->size
= 0x00200000;
183 DEBUGF("Am29LV160T\n");
184 info
->flash_id
+= FLASH_AM160T
;
185 info
->sector_count
= 35;
186 info
->size
= 0x00400000;
190 DEBUGF("Am29LV160B\n");
191 info
->flash_id
+= FLASH_AM160B
;
192 info
->sector_count
= 35;
193 info
->size
= 0x00400000;
197 DEBUGF("Am29LV320T\n");
198 info
->flash_id
+= FLASH_AM320T
;
199 info
->sector_count
= 67;
200 info
->size
= 0x00800000;
204 /* Has the same ID as AMD_ID_LV320T, to be fixed */
206 DEBUGF("Am29LV320B\n");
207 info
->flash_id
+= FLASH_AM320B
;
208 info
->sector_count
= 67;
209 info
->size
= 0x00800000;
214 DEBUGF("Am29LV033C\n");
215 info
->flash_id
+= FLASH_AM033C
;
216 info
->sector_count
= 64;
217 info
->size
= 0x01000000;
221 DEBUGF("M29F040B\n");
222 info
->flash_id
+= FLASH_AM040
;
223 info
->sector_count
= 8;
224 info
->size
= 0x00080000;
225 break; /* => 512 kB */
228 info
->flash_id
= FLASH_UNKNOWN
;
230 return (0); /* => no or unknown flash */
234 if (info
->sector_count
> CFG_MAX_FLASH_SECT
) {
235 printf ("** ERROR: sector count %d > max (%d) **\n",
236 info
->sector_count
, CFG_MAX_FLASH_SECT
);
237 info
->sector_count
= CFG_MAX_FLASH_SECT
;
240 if (! flash_get_offsets (addr
, info
)) {
245 /* check for protected sectors */
246 for (i
= 0; i
< info
->sector_count
; i
++) {
247 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
248 /* D0 = 1 if protected */
249 value
= in8(info
->start
[i
] + 2);
251 info
->protect
[i
] = (value
& 1) != 0;
255 * Reset bank to read mode
262 static int flash_get_offsets (ulong base
, flash_info_t
*info
)
266 switch (info
->flash_id
& FLASH_TYPEMASK
) {
268 /* set sector offsets for uniform sector type */
269 for (i
= 0; i
< info
->sector_count
; i
++) {
270 info
->start
[i
] = base
+ i
* info
->size
/
281 int flash_erase (flash_info_t
*info
, int s_first
, int s_last
)
283 volatile ulong addr
= info
->start
[0];
284 int flag
, prot
, sect
, l_sect
;
285 ulong start
, now
, last
;
287 if (s_first
< 0 || s_first
> s_last
) {
288 if (info
->flash_id
== FLASH_UNKNOWN
) {
289 printf ("- missing\n");
291 printf ("- no sectors to erase\n");
296 if (info
->flash_id
== FLASH_UNKNOWN
) {
297 printf ("Can't erase unknown flash type %08lx - aborted\n",
303 for (sect
=s_first
; sect
<=s_last
; ++sect
) {
304 if (info
->protect
[sect
]) {
310 printf ("- Warning: %d protected sectors will not be erased!\n",
318 /* Disable interrupts which might cause a timeout here */
319 flag
= disable_interrupts();
321 out8(addr
+ 0x555, 0xAA);
323 out8(addr
+ 0x2AA, 0x55);
325 out8(addr
+ 0x555, 0x80);
327 out8(addr
+ 0x555, 0xAA);
329 out8(addr
+ 0x2AA, 0x55);
332 /* Start erase on unprotected sectors */
333 for (sect
= s_first
; sect
<=s_last
; sect
++) {
334 if (info
->protect
[sect
] == 0) { /* not protected */
335 addr
= info
->start
[sect
];
342 /* re-enable interrupts if necessary */
346 /* wait at least 80us - let's wait 1 ms */
350 * We wait for the last triggered sector
355 start
= get_timer (0);
357 addr
= info
->start
[l_sect
];
359 DEBUGF ("Start erase timeout: %d\n", CFG_FLASH_ERASE_TOUT
);
361 while ((in8(addr
) & 0x80) != 0x80) {
362 if ((now
= get_timer(start
)) > CFG_FLASH_ERASE_TOUT
) {
363 printf ("Timeout\n");
364 flash_reset (info
->start
[0]);
367 /* show that we're waiting */
368 if ((now
- last
) > 1000) { /* every second */
376 /* reset to read mode */
377 flash_reset (info
->start
[0]);
384 * Copy memory to flash, returns:
387 * 2 - Flash not erased
389 int write_buff (flash_info_t
*info
, uchar
*src
, ulong addr
, ulong cnt
)
394 wp
= (addr
& ~3); /* get lower word aligned address */
397 * handle unaligned start bytes
399 if ((l
= addr
- wp
) != 0) {
401 for (i
=0, cp
=wp
; i
<l
; ++i
, ++cp
) {
402 data
= (data
<< 8) | (*(uchar
*)cp
);
404 for (; i
<4 && cnt
>0; ++i
) {
405 data
= (data
<< 8) | *src
++;
409 for (; cnt
==0 && i
<4; ++i
, ++cp
) {
410 data
= (data
<< 8) | (*(uchar
*)cp
);
413 if ((rc
= write_word(info
, wp
, data
)) != 0) {
420 * handle word aligned part
424 for (i
=0; i
<4; ++i
) {
425 data
= (data
<< 8) | *src
++;
427 if ((rc
= write_word(info
, wp
, data
)) != 0) {
439 * handle unaligned tail bytes
442 for (i
=0, cp
=wp
; i
<4 && cnt
>0; ++i
, ++cp
) {
443 data
= (data
<< 8) | *src
++;
446 for (; i
<4; ++i
, ++cp
) {
447 data
= (data
<< 8) | (*(uchar
*)cp
);
450 return (write_word(info
, wp
, data
));
454 * Write a word to Flash, returns:
457 * 2 - Flash not erased
459 static int write_word (flash_info_t
*info
, ulong dest
, ulong data
)
461 volatile ulong addr
= info
->start
[0];
465 /* Check if Flash is (sufficiently) erased */
466 if ((in32(dest
) & data
) != data
) {
470 /* write each byte out */
471 for (i
= 0; i
< 4; i
++) {
472 char *data_ch
= (char *)&data
;
473 int flag
= disable_interrupts();
475 out8(addr
+ 0x555, 0xAA);
477 out8(addr
+ 0x2AA, 0x55);
479 out8(addr
+ 0x555, 0xA0);
481 out8(dest
+i
, data_ch
[i
]);
484 /* re-enable interrupts if necessary */
488 /* data polling for D7 */
489 start
= get_timer (0);
490 while ((in8(dest
+i
) & 0x80) != (data_ch
[i
] & 0x80)) {
491 if (get_timer(start
) > CFG_FLASH_WRITE_TOUT
) {
504 * Reset bank to read mode
506 static void flash_reset (ulong addr
)
508 out8(addr
, 0xF0); /* reset bank */
512 void flash_print_info (flash_info_t
*info
)
516 if (info
->flash_id
== FLASH_UNKNOWN
) {
517 printf ("missing or unknown FLASH type\n");
521 switch (info
->flash_id
& FLASH_VENDMASK
) {
522 case FLASH_MAN_AMD
: printf ("AMD "); break;
523 case FLASH_MAN_FUJ
: printf ("FUJITSU "); break;
524 case FLASH_MAN_BM
: printf ("BRIGHT MICRO "); break;
525 case FLASH_MAN_STM
: printf ("SGS THOMSON "); break;
526 default: printf ("Unknown Vendor "); break;
529 switch (info
->flash_id
& FLASH_TYPEMASK
) {
530 case FLASH_AM040
: printf ("29F040 or 29LV040 (4 Mbit, uniform sectors)\n");
532 case FLASH_AM400B
: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
534 case FLASH_AM400T
: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
536 case FLASH_AM800B
: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
538 case FLASH_AM800T
: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
540 case FLASH_AM160B
: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
542 case FLASH_AM160T
: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
544 case FLASH_AM320B
: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
546 case FLASH_AM320T
: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
548 default: printf ("Unknown Chip Type\n");
552 if (info
->size
% 0x100000 == 0) {
553 printf (" Size: %ld MB in %d Sectors\n",
554 info
->size
/ 0x100000, info
->sector_count
);
555 } else if (info
->size
% 0x400 == 0) {
556 printf (" Size: %ld KB in %d Sectors\n",
557 info
->size
/ 0x400, info
->sector_count
);
559 printf (" Size: %ld B in %d Sectors\n",
560 info
->size
, info
->sector_count
);
563 printf (" Sector Start Addresses:");
564 for (i
=0; i
<info
->sector_count
; ++i
) {
569 info
->protect
[i
] ? " (RO)" : " "