]>
git.ipfire.org Git - u-boot.git/blob - board/rpxsuper/flash.c
3 * Marius Groeger <mgroeger@sysgo.de>
4 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
7 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
9 * Flash Routines for AMD 29F080B devices
10 * Added support for 64bit and AMD 29DL323B
12 *--------------------------------------------------------------------
13 * See file CREDITS for list of people who contributed to this
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License as
18 * published by the Free Software Foundation; either version 2 of
19 * the License, or (at your option) any later version.
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
36 flash_info_t flash_info
[CFG_MAX_FLASH_BANKS
];
38 #define RD_SWP32(x) in_le32((volatile u32*)x)
40 /*-----------------------------------------------------------------------
44 static ulong
flash_get_size (vu_long
*addr
, flash_info_t
*info
);
45 static int write_word (flash_info_t
*info
, ulong dest
, ulong data
);
47 /*-----------------------------------------------------------------------
50 unsigned long flash_init (void)
55 /* Init: no FLASHes known */
56 for (i
=0; i
<CFG_MAX_FLASH_BANKS
; ++i
) {
57 flash_info
[i
].flash_id
= FLASH_UNKNOWN
;
60 /* for now, only support the 4 MB Flash SIMM */
61 size
= flash_get_size((vu_long
*)CFG_FLASH0_BASE
, &flash_info
[0]);
64 * protect monitor and environment sectors
67 #if CFG_MONITOR_BASE >= CFG_FLASH0_BASE
68 flash_protect(FLAG_PROTECT_SET
,
70 CFG_MONITOR_BASE
+monitor_flash_len
-1,
74 #if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
76 # define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
78 flash_protect(FLAG_PROTECT_SET
,
80 CFG_ENV_ADDR
+ CFG_ENV_SIZE
- 1,
84 return /*size*/ (CFG_FLASH0_SIZE
* 1024 * 1024);
87 /*-----------------------------------------------------------------------
89 void flash_print_info (flash_info_t
*info
)
93 if (info
->flash_id
== FLASH_UNKNOWN
) {
94 printf ("missing or unknown FLASH type\n");
98 switch (info
->flash_id
& FLASH_VENDMASK
) {
99 case (AMD_MANUFACT
& FLASH_VENDMASK
):
102 case (FUJ_MANUFACT
& FLASH_VENDMASK
):
105 case (SST_MANUFACT
& FLASH_VENDMASK
):
109 printf ("Unknown Vendor ");
113 switch (info
->flash_id
& FLASH_TYPEMASK
) {
114 case (AMD_ID_DL323B
& FLASH_TYPEMASK
):
115 printf("AM29DL323B (32 MBit)\n");
118 printf ("Unknown Chip Type\n");
122 printf (" Size: %ld MB in %d Sectors\n",
123 info
->size
>> 20, info
->sector_count
);
125 printf (" Sector Start Addresses:");
126 for (i
= 0; i
< info
->sector_count
; ++i
) {
127 if ((i
% 5) == 0) printf ("\n ");
130 info
->protect
[i
] ? " (RO)" : " "
138 * The following code cannot be run from FLASH!
141 static ulong
flash_get_size (vu_long
*addr
, flash_info_t
*info
)
144 vu_long vendor
[2], devid
[2];
145 ulong base
= (ulong
)addr
;
147 /* Reset and Write auto select command: read Manufacturer ID */
148 addr
[0] = 0xf0f0f0f0;
149 addr
[2 * 0x0555] = 0xAAAAAAAA;
150 addr
[2 * 0x02AA] = 0x55555555;
151 addr
[2 * 0x0555] = 0x90909090;
152 addr
[1] = 0xf0f0f0f0;
153 addr
[2 * 0x0555 + 1] = 0xAAAAAAAA;
154 addr
[2 * 0x02AA + 1] = 0x55555555;
155 addr
[2 * 0x0555 + 1] = 0x90909090;
158 vendor
[0] = RD_SWP32(&addr
[0]);
159 vendor
[1] = RD_SWP32(&addr
[1]);
160 if (vendor
[0] != vendor
[1] || vendor
[0] != AMD_MANUFACT
) {
165 devid
[0] = RD_SWP32(&addr
[2]);
166 devid
[1] = RD_SWP32(&addr
[3]);
168 if (devid
[0] == AMD_ID_DL323B
) {
171 * Bank 1 (23 Sectors): 0-7=8kbyte, 8-22=64kbyte
172 * Bank 2 (48 Sectors): 23-70=64kbyte
174 info
->flash_id
= (AMD_MANUFACT
& FLASH_VENDMASK
) |
175 (AMD_ID_DL323B
& FLASH_TYPEMASK
);
176 info
->sector_count
= 71;
177 info
->size
= 4 * (8 * 8 + 63 * 64) * 1024;
184 /* set up sector start address table */
185 for (i
= 0; i
< 8; i
++) {
186 info
->start
[i
] = base
+ (i
* 0x8000);
188 for (i
= 8; i
< info
->sector_count
; i
++) {
189 info
->start
[i
] = base
+ (i
* 0x40000) + 8 * 0x8000 - 8 * 0x40000;
192 /* check for protected sectors */
193 for (i
= 0; i
< info
->sector_count
; i
++) {
194 /* read sector protection at sector address */
195 addr
= (volatile unsigned long *)(info
->start
[i
]);
196 addr
[2 * 0x0555] = 0xAAAAAAAA;
197 addr
[2 * 0x02AA] = 0x55555555;
198 addr
[2 * 0x0555] = 0x90909090;
199 addr
[2 * 0x0555 + 1] = 0xAAAAAAAA;
200 addr
[2 * 0x02AA + 1] = 0x55555555;
201 addr
[2 * 0x0555 + 1] = 0x90909090;
203 base
= RD_SWP32(&addr
[4]);
204 base
|= RD_SWP32(&addr
[5]);
205 info
->protect
[i
] = base
& 0x00010001 ? 1 : 0;
207 addr
= (vu_long
*)info
->start
[0];
211 addr
[0] = 0xf0f0f0f0;
212 addr
[1] = 0xf0f0f0f0;
218 /*-----------------------------------------------------------------------
221 int flash_erase (flash_info_t
*info
, int s_first
, int s_last
)
223 vu_long
*addr
= (vu_long
*)(info
->start
[0]);
224 int flag
, prot
, sect
, l_sect
;
225 ulong start
, now
, last
;
227 if ((s_first
< 0) || (s_first
> s_last
)) {
228 if (info
->flash_id
== FLASH_UNKNOWN
) {
229 printf ("- missing\n");
231 printf ("- no sectors to erase\n");
237 for (sect
= s_first
; sect
<= s_last
; sect
++) {
238 if (info
->protect
[sect
]) {
244 printf ("- Warning: %d protected sectors will not be erased!\n",
252 /* Disable interrupts which might cause a timeout here */
253 flag
= disable_interrupts();
255 addr
[2 * 0x0555] = 0xAAAAAAAA;
256 addr
[2 * 0x02AA] = 0x55555555;
257 addr
[2 * 0x0555] = 0x80808080;
258 addr
[2 * 0x0555] = 0xAAAAAAAA;
259 addr
[2 * 0x02AA] = 0x55555555;
260 addr
[2 * 0x0555 + 1] = 0xAAAAAAAA;
261 addr
[2 * 0x02AA + 1] = 0x55555555;
262 addr
[2 * 0x0555 + 1] = 0x80808080;
263 addr
[2 * 0x0555 + 1] = 0xAAAAAAAA;
264 addr
[2 * 0x02AA + 1] = 0x55555555;
267 /* Start erase on unprotected sectors */
268 for (sect
= s_first
; sect
<=s_last
; sect
++) {
269 if (info
->protect
[sect
] == 0) { /* not protected */
270 addr
= (vu_long
*)(info
->start
[sect
]);
271 addr
[0] = 0x30303030;
272 addr
[1] = 0x30303030;
277 /* re-enable interrupts if necessary */
281 /* wait at least 80us - let's wait 1 ms */
285 * We wait for the last triggered sector
290 start
= get_timer (0);
292 addr
= (vu_long
*)(info
->start
[l_sect
]);
293 while ( (addr
[0] & 0x80808080) != 0x80808080 ||
294 (addr
[1] & 0x80808080) != 0x80808080) {
295 if ((now
= get_timer(start
)) > CFG_FLASH_ERASE_TOUT
) {
296 printf ("Timeout\n");
299 /* show that we're waiting */
300 if ((now
- last
) > 1000) { /* every second */
307 /* reset to read mode */
308 addr
= (volatile unsigned long *)info
->start
[0];
309 addr
[0] = 0xF0F0F0F0; /* reset bank */
310 addr
[1] = 0xF0F0F0F0; /* reset bank */
316 /*-----------------------------------------------------------------------
317 * Copy memory to flash, returns:
320 * 2 - Flash not erased
323 int write_buff (flash_info_t
*info
, uchar
*src
, ulong addr
, ulong cnt
)
328 wp
= (addr
& ~3); /* get lower word aligned address */
331 * handle unaligned start bytes
333 if ((l
= addr
- wp
) != 0) {
335 for (i
=0, cp
=wp
; i
<l
; ++i
, ++cp
) {
336 data
= (data
<< 8) | (*(uchar
*)cp
);
338 for (; i
<4 && cnt
>0; ++i
) {
339 data
= (data
<< 8) | *src
++;
343 for (; cnt
==0 && i
<4; ++i
, ++cp
) {
344 data
= (data
<< 8) | (*(uchar
*)cp
);
347 if ((rc
= write_word(info
, wp
, data
)) != 0) {
354 * handle word aligned part
358 for (i
=0; i
<4; ++i
) {
359 data
= (data
<< 8) | *src
++;
361 if ((rc
= write_word(info
, wp
, data
)) != 0) {
373 * handle unaligned tail bytes
376 for (i
=0, cp
=wp
; i
<4 && cnt
>0; ++i
, ++cp
) {
377 data
= (data
<< 8) | *src
++;
380 for (; i
<4; ++i
, ++cp
) {
381 data
= (data
<< 8) | (*(uchar
*)cp
);
384 return (write_word(info
, wp
, data
));
387 /*-----------------------------------------------------------------------
388 * Write a word to Flash, returns:
391 * 2 - Flash not erased
393 static int write_word (flash_info_t
*info
, ulong dest
, ulong data
)
395 vu_long
*addr
= (vu_long
*)(info
->start
[0]);
399 /* Check if Flash is (sufficiently) erased */
400 if ((*((vu_long
*)dest
) & data
) != data
) {
403 /* Disable interrupts which might cause a timeout here */
404 flag
= disable_interrupts();
406 if ((dest
& 0x00000004) == 0) {
407 addr
[2 * 0x0555] = 0xAAAAAAAA;
408 addr
[2 * 0x02AA] = 0x55555555;
409 addr
[2 * 0x0555] = 0xA0A0A0A0;
412 addr
[2 * 0x0555 + 1] = 0xAAAAAAAA;
413 addr
[2 * 0x02AA + 1] = 0x55555555;
414 addr
[2 * 0x0555 + 1] = 0xA0A0A0A0;
417 *((vu_long
*)dest
) = data
;
419 /* re-enable interrupts if necessary */
423 /* data polling for D7 */
424 start
= get_timer (0);
425 while ((*((vu_long
*)dest
) & 0x80808080) != (data
& 0x80808080)) {
426 if (get_timer(start
) > CFG_FLASH_WRITE_TOUT
) {
433 /*-----------------------------------------------------------------------