3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
4 * Alex Zuepke <azu@sysgo.de>
6 * See file CREDITS for list of people who contributed to this
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 #define FLASH_BANK_SIZE PHYS_FLASH_SIZE
30 #define MAIN_SECT_SIZE 0x10000 /* 64 KB */
32 flash_info_t flash_info
[CONFIG_SYS_MAX_FLASH_BANKS
];
34 #define CMD_READ_ARRAY 0x000000F0
35 #define CMD_UNLOCK1 0x000000AA
36 #define CMD_UNLOCK2 0x00000055
37 #define CMD_ERASE_SETUP 0x00000080
38 #define CMD_ERASE_CONFIRM 0x00000030
39 #define CMD_PROGRAM 0x000000A0
40 #define CMD_UNLOCK_BYPASS 0x00000020
42 #define MEM_FLASH_ADDR1 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x00000555 << 1)))
43 #define MEM_FLASH_ADDR2 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x000002AA << 1)))
45 #define BIT_ERASE_DONE 0x00000080
46 #define BIT_RDY_MASK 0x00000080
47 #define BIT_PROGRAM_ERROR 0x00000020
48 #define BIT_TIMEOUT 0x80000000 /* our flag */
54 /*-----------------------------------------------------------------------
57 ulong
flash_init (void)
62 for (i
= 0; i
< CONFIG_SYS_MAX_FLASH_BANKS
; i
++) {
65 flash_info
[i
].flash_id
=
66 #if defined(CONFIG_AMD_LV400)
67 (AMD_MANUFACT
& FLASH_VENDMASK
) |
68 (AMD_ID_LV400B
& FLASH_TYPEMASK
);
69 #elif defined(CONFIG_AMD_LV800)
70 (AMD_MANUFACT
& FLASH_VENDMASK
) |
71 (AMD_ID_LV800B
& FLASH_TYPEMASK
);
73 #error "Unknown flash configured"
75 flash_info
[i
].size
= FLASH_BANK_SIZE
;
76 flash_info
[i
].sector_count
= CONFIG_SYS_MAX_FLASH_SECT
;
77 memset (flash_info
[i
].protect
, 0, CONFIG_SYS_MAX_FLASH_SECT
);
79 flashbase
= PHYS_FLASH_1
;
81 panic ("configured too many flash banks!\n");
82 for (j
= 0; j
< flash_info
[i
].sector_count
; j
++) {
84 /* 1st one is 16 KB */
86 flash_info
[i
].start
[j
] =
90 /* 2nd and 3rd are both 8 KB */
91 if ((j
== 1) || (j
== 2)) {
92 flash_info
[i
].start
[j
] =
93 flashbase
+ 0x4000 + (j
-
100 flash_info
[i
].start
[j
] =
104 flash_info
[i
].start
[j
] =
105 flashbase
+ (j
- 3) * MAIN_SECT_SIZE
;
108 size
+= flash_info
[i
].size
;
111 flash_protect (FLAG_PROTECT_SET
,
112 CONFIG_SYS_FLASH_BASE
,
113 CONFIG_SYS_FLASH_BASE
+ monitor_flash_len
- 1,
116 flash_protect (FLAG_PROTECT_SET
,
118 CONFIG_ENV_ADDR
+ CONFIG_ENV_SIZE
- 1, &flash_info
[0]);
123 /*-----------------------------------------------------------------------
125 void flash_print_info (flash_info_t
* info
)
129 switch (info
->flash_id
& FLASH_VENDMASK
) {
130 case (AMD_MANUFACT
& FLASH_VENDMASK
):
134 printf ("Unknown Vendor ");
138 switch (info
->flash_id
& FLASH_TYPEMASK
) {
139 case (AMD_ID_LV400B
& FLASH_TYPEMASK
):
140 printf ("1x Amd29LV400BB (4Mbit)\n");
142 case (AMD_ID_LV800B
& FLASH_TYPEMASK
):
143 printf ("1x Amd29LV800BB (8Mbit)\n");
146 printf ("Unknown Chip Type\n");
151 printf (" Size: %ld MB in %d Sectors\n",
152 info
->size
>> 20, info
->sector_count
);
154 printf (" Sector Start Addresses:");
155 for (i
= 0; i
< info
->sector_count
; i
++) {
159 printf (" %08lX%s", info
->start
[i
],
160 info
->protect
[i
] ? " (RO)" : " ");
167 /*-----------------------------------------------------------------------
170 int flash_erase (flash_info_t
* info
, int s_first
, int s_last
)
173 int iflag
, cflag
, prot
, sect
;
177 /* first look for protection bits */
179 if (info
->flash_id
== FLASH_UNKNOWN
)
180 return ERR_UNKNOWN_FLASH_TYPE
;
182 if ((s_first
< 0) || (s_first
> s_last
)) {
186 if ((info
->flash_id
& FLASH_VENDMASK
) !=
187 (AMD_MANUFACT
& FLASH_VENDMASK
)) {
188 return ERR_UNKNOWN_FLASH_VENDOR
;
192 for (sect
= s_first
; sect
<= s_last
; ++sect
) {
193 if (info
->protect
[sect
]) {
198 return ERR_PROTECTED
;
201 * Disable interrupts which might cause a timeout
202 * here. Remember that our exception vectors are
203 * at address 0 in the flash, and we don't want a
204 * (ticker) exception to happen while the flash
205 * chip is in programming mode.
207 cflag
= icache_status ();
209 iflag
= disable_interrupts ();
211 /* Start erase on unprotected sectors */
212 for (sect
= s_first
; sect
<= s_last
&& !ctrlc (); sect
++) {
213 printf ("Erasing sector %2d ... ", sect
);
215 /* arm simple, non interrupt dependent timer */
216 reset_timer_masked ();
218 if (info
->protect
[sect
] == 0) { /* not protected */
219 vu_short
*addr
= (vu_short
*) (info
->start
[sect
]);
221 MEM_FLASH_ADDR1
= CMD_UNLOCK1
;
222 MEM_FLASH_ADDR2
= CMD_UNLOCK2
;
223 MEM_FLASH_ADDR1
= CMD_ERASE_SETUP
;
225 MEM_FLASH_ADDR1
= CMD_UNLOCK1
;
226 MEM_FLASH_ADDR2
= CMD_UNLOCK2
;
227 *addr
= CMD_ERASE_CONFIRM
;
229 /* wait until flash is ready */
236 if (get_timer_masked () >
237 CONFIG_SYS_FLASH_ERASE_TOUT
) {
238 MEM_FLASH_ADDR1
= CMD_READ_ARRAY
;
244 && (result
& 0xFFFF) & BIT_ERASE_DONE
)
248 && (result
& 0xFFFF) & BIT_PROGRAM_ERROR
)
253 MEM_FLASH_ADDR1
= CMD_READ_ARRAY
;
265 } else { /* it was protected */
267 printf ("protected!\n");
272 printf ("User Interrupt!\n");
275 /* allow flash to settle - wait 10 ms */
276 udelay_masked (10000);
279 enable_interrupts ();
287 /*-----------------------------------------------------------------------
288 * Copy memory to flash
291 static int write_hword (flash_info_t
* info
, ulong dest
, ushort data
)
293 vu_short
*addr
= (vu_short
*) dest
;
300 * Check if Flash is (sufficiently) erased
303 if ((result
& data
) != data
)
304 return ERR_NOT_ERASED
;
308 * Disable interrupts which might cause a timeout
309 * here. Remember that our exception vectors are
310 * at address 0 in the flash, and we don't want a
311 * (ticker) exception to happen while the flash
312 * chip is in programming mode.
314 cflag
= icache_status ();
316 iflag
= disable_interrupts ();
318 MEM_FLASH_ADDR1
= CMD_UNLOCK1
;
319 MEM_FLASH_ADDR2
= CMD_UNLOCK2
;
320 MEM_FLASH_ADDR1
= CMD_UNLOCK_BYPASS
;
324 /* arm simple, non interrupt dependent timer */
325 reset_timer_masked ();
327 /* wait until flash is ready */
333 if (get_timer_masked () > CONFIG_SYS_FLASH_ERASE_TOUT
) {
337 if (!chip
&& ((result
& 0x80) == (data
& 0x80)))
340 if (!chip
&& ((result
& 0xFFFF) & BIT_PROGRAM_ERROR
)) {
343 if ((result
& 0x80) == (data
& 0x80))
351 *addr
= CMD_READ_ARRAY
;
353 if (chip
== ERR
|| *addr
!= data
)
357 enable_interrupts ();
365 /*-----------------------------------------------------------------------
366 * Copy memory to flash.
369 int write_buff (flash_info_t
* info
, uchar
* src
, ulong addr
, ulong cnt
)
376 wp
= (addr
& ~1); /* get lower word aligned address */
379 * handle unaligned start bytes
381 if ((l
= addr
- wp
) != 0) {
383 for (i
= 0, cp
= wp
; i
< l
; ++i
, ++cp
) {
384 data
= (data
>> 8) | (*(uchar
*) cp
<< 8);
386 for (; i
< 2 && cnt
> 0; ++i
) {
387 data
= (data
>> 8) | (*src
++ << 8);
391 for (; cnt
== 0 && i
< 2; ++i
, ++cp
) {
392 data
= (data
>> 8) | (*(uchar
*) cp
<< 8);
395 if ((rc
= write_hword (info
, wp
, data
)) != 0) {
402 * handle word aligned part
405 data
= *((vu_short
*) src
);
406 if ((rc
= write_hword (info
, wp
, data
)) != 0) {
419 * handle unaligned tail bytes
422 for (i
= 0, cp
= wp
; i
< 2 && cnt
> 0; ++i
, ++cp
) {
423 data
= (data
>> 8) | (*src
++ << 8);
426 for (; i
< 2; ++i
, ++cp
) {
427 data
= (data
>> 8) | (*(uchar
*) cp
<< 8);
430 return write_hword (info
, wp
, data
);