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git.ipfire.org Git - people/ms/u-boot.git/blob - board/ep8260/flash.c
2 * (C) Copyright 2001, 2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 * Frank Panno <fpanno@delphintech.com>, Delphin Technology AG
8 * Flash Routines for AMD device AM29DL323DB on the EP8260 board.
10 * This file is based on board/tqm8260/flash.c.
11 *--------------------------------------------------------------------
12 * See file CREDITS for list of people who contributed to this
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License as
17 * published by the Free Software Foundation; either version 2 of
18 * the License, or (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
34 #define V_ULONG(a) (*(volatile unsigned long *)( a ))
35 #define V_BYTE(a) (*(volatile unsigned char *)( a ))
38 flash_info_t flash_info
[CFG_MAX_FLASH_BANKS
];
41 /*-----------------------------------------------------------------------
43 void flash_reset(void)
45 if( flash_info
[0].flash_id
!= FLASH_UNKNOWN
) {
46 V_ULONG( flash_info
[0].start
[0] ) = 0x00F000F0;
47 V_ULONG( flash_info
[0].start
[0] + 4 ) = 0x00F000F0;
51 /*-----------------------------------------------------------------------
53 ulong
flash_get_size( ulong baseaddr
, flash_info_t
*info
)
56 unsigned long flashtest_h
, flashtest_l
;
58 /* Write auto select command sequence and test FLASH answer */
59 V_ULONG(baseaddr
+ ((ulong
)0x0555 << 3)) = 0x00AA00AA;
60 V_ULONG(baseaddr
+ ((ulong
)0x02AA << 3)) = 0x00550055;
61 V_ULONG(baseaddr
+ ((ulong
)0x0555 << 3)) = 0x00900090;
62 V_ULONG(baseaddr
+ 4 + ((ulong
)0x0555 << 3)) = 0x00AA00AA;
63 V_ULONG(baseaddr
+ 4 + ((ulong
)0x02AA << 3)) = 0x00550055;
64 V_ULONG(baseaddr
+ 4 + ((ulong
)0x0555 << 3)) = 0x00900090;
66 flashtest_h
= V_ULONG(baseaddr
); /* manufacturer ID */
67 flashtest_l
= V_ULONG(baseaddr
+ 4);
69 if ((int)flashtest_h
== AMD_MANUFACT
) {
70 info
->flash_id
= FLASH_MAN_AMD
;
72 info
->flash_id
= FLASH_UNKNOWN
;
73 info
->sector_count
= 0;
75 return (0); /* no or unknown flash */
78 flashtest_h
= V_ULONG(baseaddr
+ 8); /* device ID */
79 flashtest_l
= V_ULONG(baseaddr
+ 12);
80 if (flashtest_h
!= flashtest_l
) {
81 info
->flash_id
= FLASH_UNKNOWN
;
84 if (flashtest_h
== AMD_ID_DL323B
) {
85 info
->flash_id
+= FLASH_AMDL323B
;
86 info
->sector_count
= 71;
87 info
->size
= 0x01000000; /* 4 * 4 MB = 16 MB */
89 info
->flash_id
= FLASH_UNKNOWN
;
90 return(0); /* no or unknown flash */
93 /* set up sector start adress table (bottom sector type) */
94 for (i
= 0; i
< 8; i
++) {
95 info
->start
[i
] = baseaddr
+ (i
* 0x00008000);
97 for (i
= 8; i
< info
->sector_count
; i
++) {
98 info
->start
[i
] = baseaddr
+ (i
* 0x00040000) - 0x001C0000;
101 /* check for protected sectors */
102 for (i
= 0; i
< info
->sector_count
; i
++) {
103 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
104 if ((V_ULONG( info
->start
[i
] + 16 ) & 0x00010001) ||
105 (V_ULONG( info
->start
[i
] + 20 ) & 0x00010001)) {
106 info
->protect
[i
] = 1; /* D0 = 1 if protected */
108 info
->protect
[i
] = 0;
116 /*-----------------------------------------------------------------------
118 unsigned long flash_init (void)
120 unsigned long size_b0
= 0;
123 /* Init: no FLASHes known */
124 for (i
=0; i
<CFG_MAX_FLASH_BANKS
; ++i
) {
125 flash_info
[i
].flash_id
= FLASH_UNKNOWN
;
128 /* Static FLASH Bank configuration here (only one bank) */
130 size_b0
= flash_get_size(CFG_FLASH0_BASE
, &flash_info
[0]);
131 if (flash_info
[0].flash_id
== FLASH_UNKNOWN
|| size_b0
== 0) {
132 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
133 size_b0
, size_b0
>>20);
137 * protect monitor and environment sectors
140 #if CFG_MONITOR_BASE >= CFG_FLASH0_BASE
141 flash_protect(FLAG_PROTECT_SET
,
143 CFG_MONITOR_BASE
+monitor_flash_len
-1,
147 #if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
148 # ifndef CFG_ENV_SIZE
149 # define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
151 flash_protect(FLAG_PROTECT_SET
,
153 CFG_ENV_ADDR
+ CFG_ENV_SIZE
- 1,
160 /*-----------------------------------------------------------------------
162 void flash_print_info (flash_info_t
*info
)
166 if (info
->flash_id
== FLASH_UNKNOWN
) {
167 printf ("missing or unknown FLASH type\n");
171 switch ((info
->flash_id
>> 16) & 0xff) {
172 case FLASH_MAN_AMD
: printf ("AMD "); break;
173 default: printf ("Unknown Vendor "); break;
176 switch (info
->flash_id
& FLASH_TYPEMASK
) {
177 case FLASH_AMDL323B
: printf ("29DL323B (32 M, bottom sector)\n");
179 default: printf ("Unknown Chip Type\n");
183 printf (" Size: %ld MB in %d Sectors\n",
184 info
->size
>> 20, info
->sector_count
);
186 printf (" Sector Start Addresses:");
187 for (i
=0; i
<info
->sector_count
; ++i
) {
192 info
->protect
[i
] ? " (RO)" : " "
199 /*-----------------------------------------------------------------------
201 int flash_erase (flash_info_t
*info
, int s_first
, int s_last
)
203 int flag
, prot
, sect
, l_sect
;
204 ulong start
, now
, last
;
206 if ((s_first
< 0) || (s_first
> s_last
)) {
207 if (info
->flash_id
== FLASH_UNKNOWN
) {
208 printf ("- missing\n");
210 printf ("- no sectors to erase\n");
216 for (sect
= s_first
; sect
<= s_last
; sect
++) {
217 if (info
->protect
[sect
])
222 printf ("- Warning: %d protected sectors will not be erased!\n",
230 /* Disable interrupts which might cause a timeout here */
231 flag
= disable_interrupts();
233 V_ULONG( info
->start
[0] + (0x0555 << 3) ) = 0x00AA00AA;
234 V_ULONG( info
->start
[0] + (0x02AA << 3) ) = 0x00550055;
235 V_ULONG( info
->start
[0] + (0x0555 << 3) ) = 0x00800080;
236 V_ULONG( info
->start
[0] + (0x0555 << 3) ) = 0x00AA00AA;
237 V_ULONG( info
->start
[0] + (0x02AA << 3) ) = 0x00550055;
238 V_ULONG( info
->start
[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
239 V_ULONG( info
->start
[0] + 4 + (0x02AA << 3) ) = 0x00550055;
240 V_ULONG( info
->start
[0] + 4 + (0x0555 << 3) ) = 0x00800080;
241 V_ULONG( info
->start
[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
242 V_ULONG( info
->start
[0] + 4 + (0x02AA << 3) ) = 0x00550055;
245 /* Start erase on unprotected sectors */
246 for (sect
= s_first
; sect
<=s_last
; sect
++) {
247 if (info
->protect
[sect
] == 0) { /* not protected */
248 V_ULONG( info
->start
[sect
] ) = 0x00300030;
249 V_ULONG( info
->start
[sect
] + 4 ) = 0x00300030;
254 /* re-enable interrupts if necessary */
258 /* wait at least 80us - let's wait 1 ms */
262 * We wait for the last triggered sector
267 start
= get_timer (0);
269 while ((V_ULONG( info
->start
[l_sect
] ) & 0x00800080) != 0x00800080 ||
270 (V_ULONG( info
->start
[l_sect
] + 4 ) & 0x00800080) != 0x00800080)
272 if ((now
= get_timer(start
)) > CFG_FLASH_ERASE_TOUT
) {
273 printf ("Timeout\n");
276 /* show that we're waiting */
277 if ((now
- last
) > 1000) { /* every second */
284 /* reset to read mode */
291 static int write_dword (flash_info_t
*, ulong
, unsigned char *);
293 /*-----------------------------------------------------------------------
294 * Copy memory to flash, returns:
297 * 2 - Flash not erased
300 int write_buff (flash_info_t
*info
, uchar
*src
, ulong addr
, ulong cnt
)
303 static unsigned char bb
[8];
304 int i
, l
, rc
, cc
= cnt
;
306 dp
= (addr
& ~7); /* get lower dword aligned address */
309 * handle unaligned start bytes
311 if ((l
= addr
- dp
) != 0) {
312 for (i
= 0; i
< 8; i
++)
313 bb
[i
] = (i
< l
|| (i
-l
) >= cc
) ? V_BYTE(dp
+i
) : *src
++;
314 if ((rc
= write_dword(info
, dp
, bb
)) != 0)
323 * handle word aligned part
326 if ((rc
= write_dword(info
, dp
, src
)) != 0) {
339 * handle unaligned tail bytes
341 for (i
= 0; i
< 8; i
++) {
342 bb
[i
] = (i
< cc
) ? *src
++ : V_BYTE(dp
+i
);
344 return (write_dword(info
, dp
, bb
));
347 /*-----------------------------------------------------------------------
348 * Write a dword to Flash, returns:
351 * 2 - Flash not erased
353 static int write_dword (flash_info_t
*info
, ulong dest
, unsigned char * pdata
)
359 for (ch
=0, i
=0; i
< 4; i
++)
360 ch
= (ch
<< 8) + *pdata
++; /* high word */
361 for (cl
=0, i
=0; i
< 4; i
++)
362 cl
= (cl
<< 8) + *pdata
++; /* low word */
364 /* Check if Flash is (sufficiently) erased */
365 if ((*((vu_long
*)dest
) & ch
) != ch
366 ||(*((vu_long
*)(dest
+ 4)) & cl
) != cl
)
371 /* Disable interrupts which might cause a timeout here */
372 flag
= disable_interrupts();
374 V_ULONG( info
->start
[0] + (0x0555 << 3) ) = 0x00AA00AA;
375 V_ULONG( info
->start
[0] + (0x02AA << 3) ) = 0x00550055;
376 V_ULONG( info
->start
[0] + (0x0555 << 3) ) = 0x00A000A0;
377 V_ULONG( dest
) = ch
;
378 V_ULONG( info
->start
[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
379 V_ULONG( info
->start
[0] + 4 + (0x02AA << 3) ) = 0x00550055;
380 V_ULONG( info
->start
[0] + 4 + (0x0555 << 3) ) = 0x00A000A0;
381 V_ULONG( dest
+ 4 ) = cl
;
383 /* re-enable interrupts if necessary */
387 /* data polling for D7 */
388 start
= get_timer (0);
389 while (((V_ULONG( dest
) & 0x00800080) != (ch
& 0x00800080)) ||
390 ((V_ULONG( dest
+ 4 ) & 0x00800080) != (cl
& 0x00800080))) {
391 if (get_timer(start
) > CFG_FLASH_WRITE_TOUT
) {