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git.ipfire.org Git - people/ms/u-boot.git/blob - board/cmc_pu2/flash.c
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2 * (C) Copyright 2003-2004
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 * Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de
8 * Modified for the CMC PU2 by (C) Copyright 2004 Gary Jennejohn
11 * See file CREDITS for list of people who contributed to this
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
33 #define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
36 flash_info_t flash_info
[CFG_MAX_FLASH_BANKS
]; /* info for FLASH chips */
38 #define FLASH_CYCLE1 0x0555
39 #define FLASH_CYCLE2 0x02AA
41 /*-----------------------------------------------------------------------
44 static ulong
flash_get_size(vu_short
*addr
, flash_info_t
*info
);
45 static void flash_reset(flash_info_t
*info
);
46 static int write_word_amd(flash_info_t
*info
, vu_short
*dest
, ushort data
);
47 static flash_info_t
*flash_get_info(ulong base
);
49 /*-----------------------------------------------------------------------
52 * sets up flash_info and returns size of FLASH (bytes)
54 unsigned long flash_init (void)
56 unsigned long size
= 0;
57 ulong flashbase
= CFG_FLASH_BASE
;
59 /* Init: no FLASHes known */
60 memset(&flash_info
[0], 0, sizeof(flash_info_t
));
62 flash_info
[0].size
= flash_get_size((vu_short
*)flashbase
, &flash_info
[0]);
64 size
= flash_info
[0].size
;
66 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
67 /* monitor protection ON by default */
68 flash_protect(FLAG_PROTECT_SET
,
70 CFG_MONITOR_BASE
+monitor_flash_len
-1,
71 flash_get_info(CFG_MONITOR_BASE
));
74 #ifdef CONFIG_ENV_IS_IN_FLASH
75 /* ENV protection ON by default */
76 flash_protect(FLAG_PROTECT_SET
,
78 CFG_ENV_ADDR
+CFG_ENV_SIZE
-1,
79 flash_get_info(CFG_ENV_ADDR
));
82 return size
? size
: 1;
85 /*-----------------------------------------------------------------------
87 static void flash_reset(flash_info_t
*info
)
89 vu_short
*base
= (vu_short
*)(info
->start
[0]);
91 /* Put FLASH back in read mode */
92 if ((info
->flash_id
& FLASH_VENDMASK
) == FLASH_MAN_INTEL
)
93 *base
= 0x00FF; /* Intel Read Mode */
94 else if ((info
->flash_id
& FLASH_VENDMASK
) == FLASH_MAN_AMD
)
95 *base
= 0x00F0; /* AMD Read Mode */
98 /*-----------------------------------------------------------------------
101 static flash_info_t
*flash_get_info(ulong base
)
107 for (i
= 0; i
< CFG_MAX_FLASH_BANKS
; i
++) {
108 info
= & flash_info
[i
];
109 if (info
->size
&& info
->start
[0] <= base
&&
110 base
<= info
->start
[0] + info
->size
- 1)
114 return i
== CFG_MAX_FLASH_BANKS
? 0 : info
;
117 /*-----------------------------------------------------------------------
120 void flash_print_info (flash_info_t
*info
)
124 if (info
->flash_id
== FLASH_UNKNOWN
) {
125 printf ("missing or unknown FLASH type\n");
129 switch (info
->flash_id
& FLASH_VENDMASK
) {
130 case FLASH_MAN_AMD
: printf ("AMD "); break;
131 case FLASH_MAN_BM
: printf ("BRIGHT MICRO "); break;
132 case FLASH_MAN_FUJ
: printf ("FUJITSU "); break;
133 case FLASH_MAN_SST
: printf ("SST "); break;
134 case FLASH_MAN_STM
: printf ("STM "); break;
135 case FLASH_MAN_INTEL
: printf ("INTEL "); break;
136 default: printf ("Unknown Vendor "); break;
139 switch (info
->flash_id
& FLASH_TYPEMASK
) {
140 case FLASH_S29GL064M
:
141 printf ("S29GL064M-R6 (64Mbit, uniform sector size)\n");
144 printf ("Unknown Chip Type\n");
148 printf (" Size: %ld MB in %d Sectors\n",
152 printf (" Sector Start Addresses:");
154 for (i
=0; i
<info
->sector_count
; ++i
) {
160 info
->protect
[i
] ? " (RO)" : " ");
166 /*-----------------------------------------------------------------------
170 * The following code cannot be run from FLASH!
173 ulong
flash_get_size (vu_short
*addr
, flash_info_t
*info
)
177 ulong base
= (ulong
)addr
;
179 /* Write auto select command sequence */
180 addr
[FLASH_CYCLE1
] = 0x00AA; /* for AMD, Intel ignores this */
181 addr
[FLASH_CYCLE2
] = 0x0055; /* for AMD, Intel ignores this */
182 addr
[FLASH_CYCLE1
] = 0x0090; /* selects Intel or AMD */
184 /* read Manufacturer ID */
187 debug ("Manufacturer ID: %04X\n", value
);
191 case (AMD_MANUFACT
& 0xFFFF):
192 debug ("Manufacturer: AMD (Spansion)\n");
193 info
->flash_id
= FLASH_MAN_AMD
;
196 case (INTEL_MANUFACT
& 0xFFFF):
197 debug ("Manufacturer: Intel (not supported yet)\n");
198 info
->flash_id
= FLASH_MAN_INTEL
;
202 printf ("Unknown Manufacturer ID: %04X\n", value
);
203 info
->flash_id
= FLASH_UNKNOWN
;
204 info
->sector_count
= 0;
210 debug ("Device ID: %04X\n", value
);
214 case (AMD_ID_MIRROR
& 0xFFFF):
215 debug ("Mirror Bit flash: addr[14] = %08X addr[15] = %08X\n",
219 case (AMD_ID_GL064M_2
& 0xFFFF):
220 if (addr
[15] != (AMD_ID_GL064M_3
& 0xffff)) {
221 printf ("Chip: S29GLxxxM -> unknown\n");
222 info
->flash_id
= FLASH_UNKNOWN
;
223 info
->sector_count
= 0;
226 debug ("Chip: S29GL064M-R6\n");
227 info
->flash_id
+= FLASH_S29GL064M
;
228 info
->sector_count
= 128;
229 info
->size
= 0x00800000;
230 for (i
= 0; i
< info
->sector_count
; i
++) {
231 info
->start
[i
] = base
;
235 break; /* => 16 MB */
237 printf ("Chip: *** unknown ***\n");
238 info
->flash_id
= FLASH_UNKNOWN
;
239 info
->sector_count
= 0;
246 printf ("Unknown Device ID: %04X\n", value
);
247 info
->flash_id
= FLASH_UNKNOWN
;
248 info
->sector_count
= 0;
254 /* Put FLASH back in read mode */
260 /*-----------------------------------------------------------------------
263 int flash_erase (flash_info_t
*info
, int s_first
, int s_last
)
265 vu_short
*addr
= (vu_short
*)(info
->start
[0]);
266 int flag
, prot
, sect
, ssect
, l_sect
;
269 debug ("flash_erase: first: %d last: %d\n", s_first
, s_last
);
271 if ((s_first
< 0) || (s_first
> s_last
)) {
272 if (info
->flash_id
== FLASH_UNKNOWN
) {
273 printf ("- missing\n");
275 printf ("- no sectors to erase\n");
280 if ((info
->flash_id
== FLASH_UNKNOWN
) ||
281 (info
->flash_id
> FLASH_AMD_COMP
)) {
282 printf ("Can't erase unknown flash type %08lx - aborted\n",
288 for (sect
=s_first
; sect
<=s_last
; ++sect
) {
289 if (info
->protect
[sect
]) {
295 printf ("- Warning: %d protected sectors will not be erased!\n",
301 /* Disable interrupts which might cause a timeout here */
302 flag
= disable_interrupts();
305 * Start erase on unprotected sectors.
306 * Since the flash can erase multiple sectors with one command
307 * we take advantage of that by doing the erase in chunks of
310 for (sect
= s_first
; sect
<= s_last
; ) {
313 addr
[FLASH_CYCLE1
] = 0x00AA;
314 addr
[FLASH_CYCLE2
] = 0x0055;
315 addr
[FLASH_CYCLE1
] = 0x0080;
316 addr
[FLASH_CYCLE1
] = 0x00AA;
317 addr
[FLASH_CYCLE2
] = 0x0055;
319 /* do the erase in chunks of at most 3 sectors */
320 for (ssect
= 0; ssect
< 3; ssect
++) {
321 if ((sect
+ ssect
) > s_last
)
323 if (info
->protect
[sect
+ ssect
] == 0) { /* not protected */
324 addr
= (vu_short
*)(info
->start
[sect
+ ssect
]);
326 l_sect
= sect
+ ssect
;
329 /* wait at least 80us - let's wait 1 ms */
333 * We wait for the last triggered sector
338 reset_timer_masked ();
340 addr
= (vu_short
*)(info
->start
[l_sect
]);
341 while ((addr
[0] & 0x0080) != 0x0080) {
342 if ((now
= get_timer_masked ()) > CFG_FLASH_ERASE_TOUT
) {
343 printf ("Timeout\n");
346 /* show that we're waiting */
347 if ((now
- last
) > 1000) { /* every second */
352 addr
= (vu_short
*)info
->start
[0];
353 addr
[0] = 0x00F0; /* reset bank */
357 /* re-enable interrupts if necessary */
362 /* reset to read mode */
363 addr
= (vu_short
*)info
->start
[0];
364 addr
[0] = 0x00F0; /* reset bank */
370 /*-----------------------------------------------------------------------
371 * Copy memory to flash, returns:
374 * 2 - Flash not erased
377 int write_buff (flash_info_t
*info
, uchar
*src
, ulong addr
, ulong cnt
)
383 printf ("unaligned destination not supported\n");
388 printf ("unaligned source not supported\n");
395 data
= *((vu_short
*)src
);
396 if ((rc
= write_word_amd(info
, (vu_short
*)wp
, data
)) != 0) {
397 printf ("write_buff 1: write_word_amd() rc=%d\n", rc
);
410 data
= (*((volatile u8
*) src
)) | (*((volatile u8
*) (wp
+ 1)) << 8);
411 if ((rc
= write_word_amd(info
, (vu_short
*)wp
, data
)) != 0) {
412 printf ("write_buff 1: write_word_amd() rc=%d\n", rc
);
423 /*-----------------------------------------------------------------------
424 * Write a word to Flash for AMD FLASH
425 * A word is 16 or 32 bits, whichever the bus width of the flash bank
426 * (not an individual chip) is.
431 * 2 - Flash not erased
433 static int write_word_amd (flash_info_t
*info
, vu_short
*dest
, ushort data
)
436 vu_short
*base
; /* first address in flash bank */
438 /* Check if Flash is (sufficiently) erased */
439 if ((*dest
& data
) != data
) {
443 base
= (vu_short
*)(info
->start
[0]);
445 /* Disable interrupts which might cause a timeout here */
446 flag
= disable_interrupts();
448 base
[FLASH_CYCLE1
] = 0x00AA; /* unlock */
449 base
[FLASH_CYCLE2
] = 0x0055; /* unlock */
450 base
[FLASH_CYCLE1
] = 0x00A0; /* selects program mode */
452 *dest
= data
; /* start programming the data */
454 /* re-enable interrupts if necessary */
458 reset_timer_masked ();
460 /* data polling for D7 */
461 while ((*dest
& 0x0080) != (data
& 0x0080)) {
462 if (get_timer_masked () > CFG_FLASH_WRITE_TOUT
) {
463 *dest
= 0x00F0; /* reset bank */