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git.ipfire.org Git - people/ms/u-boot.git/blob - board/cobra5272/flash.c
2 * (C) Copyright 2000-2003
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #define PHYS_FLASH_1 CFG_FLASH_BASE
27 #define FLASH_BANK_SIZE 0x200000
29 flash_info_t flash_info
[CFG_MAX_FLASH_BANKS
];
31 void flash_print_info (flash_info_t
* info
)
35 switch (info
->flash_id
& FLASH_VENDMASK
) {
36 case (AMD_MANUFACT
& FLASH_VENDMASK
):
40 printf ("Unknown Vendor ");
44 switch (info
->flash_id
& FLASH_TYPEMASK
) {
45 case (AMD_ID_PL160CB
& FLASH_TYPEMASK
):
46 printf ("AM29PL160CB (16Mbit)\n");
49 printf ("Unknown Chip Type\n");
54 printf (" Size: %ld MB in %d Sectors\n",
55 info
->size
>> 20, info
->sector_count
);
57 printf (" Sector Start Addresses:");
58 for (i
= 0; i
< info
->sector_count
; i
++) {
62 printf (" %08lX%s", info
->start
[i
],
63 info
->protect
[i
] ? " (RO)" : " ");
71 unsigned long flash_init (void)
76 for (i
= 0; i
< CFG_MAX_FLASH_BANKS
; i
++) {
79 flash_info
[i
].flash_id
=
80 (AMD_MANUFACT
& FLASH_VENDMASK
) |
81 (AMD_ID_PL160CB
& FLASH_TYPEMASK
);
82 flash_info
[i
].size
= FLASH_BANK_SIZE
;
83 flash_info
[i
].sector_count
= CFG_MAX_FLASH_SECT
;
84 memset (flash_info
[i
].protect
, 0, CFG_MAX_FLASH_SECT
);
86 flashbase
= PHYS_FLASH_1
;
88 panic ("configured to many flash banks!\n");
90 for (j
= 0; j
< flash_info
[i
].sector_count
; j
++) {
93 flash_info
[i
].start
[j
] = flashbase
;
95 if ((j
>= 1) && (j
<= 2)) {
96 /* 2nd and 3rd are 8 KiB */
97 flash_info
[i
].start
[j
] =
98 flashbase
+ 0x4000 + 0x2000 * (j
- 1);
102 flash_info
[i
].start
[j
] = flashbase
+ 0x8000;
104 if ((j
>= 4) && (j
<= 10)) {
105 /* rest is 256 KiB */
106 flash_info
[i
].start
[j
] =
107 flashbase
+ 0x40000 + 0x40000 * (j
-
111 size
+= flash_info
[i
].size
;
114 flash_protect (FLAG_PROTECT_SET
,
116 CFG_FLASH_BASE
+ 0x3ffff, &flash_info
[0]);
122 #define CMD_READ_ARRAY 0x00F0
123 #define CMD_UNLOCK1 0x00AA
124 #define CMD_UNLOCK2 0x0055
125 #define CMD_ERASE_SETUP 0x0080
126 #define CMD_ERASE_CONFIRM 0x0030
127 #define CMD_PROGRAM 0x00A0
128 #define CMD_UNLOCK_BYPASS 0x0020
130 #define MEM_FLASH_ADDR1 (*(volatile u16 *)(CFG_FLASH_BASE + (0x00000555<<1)))
131 #define MEM_FLASH_ADDR2 (*(volatile u16 *)(CFG_FLASH_BASE + (0x000002AA<<1)))
133 #define BIT_ERASE_DONE 0x0080
134 #define BIT_RDY_MASK 0x0080
135 #define BIT_PROGRAM_ERROR 0x0020
136 #define BIT_TIMEOUT 0x80000000 /* our flag */
143 int flash_erase (flash_info_t
* info
, int s_first
, int s_last
)
146 int iflag
, cflag
, prot
, sect
;
150 /* first look for protection bits */
152 if (info
->flash_id
== FLASH_UNKNOWN
)
153 return ERR_UNKNOWN_FLASH_TYPE
;
155 if ((s_first
< 0) || (s_first
> s_last
)) {
159 if ((info
->flash_id
& FLASH_VENDMASK
) !=
160 (AMD_MANUFACT
& FLASH_VENDMASK
)) {
161 return ERR_UNKNOWN_FLASH_VENDOR
;
165 for (sect
= s_first
; sect
<= s_last
; ++sect
) {
166 if (info
->protect
[sect
]) {
171 return ERR_PROTECTED
;
174 * Disable interrupts which might cause a timeout
175 * here. Remember that our exception vectors are
176 * at address 0 in the flash, and we don't want a
177 * (ticker) exception to happen while the flash
178 * chip is in programming mode.
181 cflag
= icache_status ();
183 iflag
= disable_interrupts ();
187 /* Start erase on unprotected sectors */
188 for (sect
= s_first
; sect
<= s_last
&& !ctrlc (); sect
++) {
189 printf ("Erasing sector %2d ... ", sect
);
191 /* arm simple, non interrupt dependent timer */
194 if (info
->protect
[sect
] == 0) { /* not protected */
196 (volatile u16
*) (info
->start
[sect
]);
198 MEM_FLASH_ADDR1
= CMD_UNLOCK1
;
199 MEM_FLASH_ADDR2
= CMD_UNLOCK2
;
200 MEM_FLASH_ADDR1
= CMD_ERASE_SETUP
;
202 MEM_FLASH_ADDR1
= CMD_UNLOCK1
;
203 MEM_FLASH_ADDR2
= CMD_UNLOCK2
;
204 *addr
= CMD_ERASE_CONFIRM
;
206 /* wait until flash is ready */
213 if (get_timer (0) > CFG_FLASH_ERASE_TOUT
) {
214 MEM_FLASH_ADDR1
= CMD_READ_ARRAY
;
220 && (result
& 0xFFFF) & BIT_ERASE_DONE
)
225 MEM_FLASH_ADDR1
= CMD_READ_ARRAY
;
237 } else { /* it was protected */
239 printf ("protected!\n");
244 printf ("User Interrupt!\n");
247 /* allow flash to settle - wait 10 ms */
251 enable_interrupts ();
260 volatile static int write_word (flash_info_t
* info
, ulong dest
, ulong data
)
262 volatile u16
*addr
= (volatile u16
*) dest
;
269 * Check if Flash is (sufficiently) erased
272 if ((result
& data
) != data
)
273 return ERR_NOT_ERASED
;
277 * Disable interrupts which might cause a timeout
278 * here. Remember that our exception vectors are
279 * at address 0 in the flash, and we don't want a
280 * (ticker) exception to happen while the flash
281 * chip is in programming mode.
284 cflag
= icache_status ();
286 iflag
= disable_interrupts ();
288 MEM_FLASH_ADDR1
= CMD_UNLOCK1
;
289 MEM_FLASH_ADDR2
= CMD_UNLOCK2
;
290 MEM_FLASH_ADDR1
= CMD_PROGRAM
;
293 /* arm simple, non interrupt dependent timer */
296 /* wait until flash is ready */
302 if (get_timer (0) > CFG_FLASH_ERASE_TOUT
) {
306 if (!chip1
&& ((result
& 0x80) == (data
& 0x80)))
311 *addr
= CMD_READ_ARRAY
;
313 if (chip1
== ERR
|| *addr
!= data
)
317 enable_interrupts ();
326 int write_buff (flash_info_t
* info
, uchar
* src
, ulong addr
, ulong cnt
)
332 printf ("unaligned destination not supported\n");
338 printf ("odd transfer sizes not supported\n");
346 data
= (*((volatile u8
*) addr
) << 8) | *((volatile u8
*)
348 if ((rc
= write_word (info
, wp
- 1, data
)) != 0) {
357 data
= *((volatile u16
*) src
);
358 if ((rc
= write_word (info
, wp
, data
)) != 0) {
367 data
= (*((volatile u8
*) src
) << 8) |
368 *((volatile u8
*) (wp
+ 1));
369 if ((rc
= write_word (info
, wp
, data
)) != 0) {