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git.ipfire.org Git - people/ms/u-boot.git/blob - board/atmel/atstk1000/flash.c
2 * Copyright (C) 2005-2006 Atmel Corporation
4 * See file CREDITS for list of people who contributed to this
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 #ifdef CONFIG_ATSTK1000_EXT_FLASH
25 #include <asm/cacheflush.h>
27 #include <asm/sections.h>
29 DECLARE_GLOBAL_DATA_PTR
;
31 flash_info_t flash_info
[1];
33 static void __flashprog
flash_identify(uint16_t *flash
, flash_info_t
*info
)
37 flags
= disable_interrupts();
39 dcache_flush_unlocked();
41 writew(0xaa, flash
+ 0x555);
42 writew(0x55, flash
+ 0xaaa);
43 writew(0x90, flash
+ 0x555);
44 info
->flash_id
= readl(flash
);
53 unsigned long flash_init(void)
58 gd
->bd
->bi_flashstart
= CFG_FLASH_BASE
;
59 gd
->bd
->bi_flashsize
= CFG_FLASH_SIZE
;
60 gd
->bd
->bi_flashoffset
= __edata_lma
- _text
;
62 flash_info
[0].size
= CFG_FLASH_SIZE
;
63 flash_info
[0].sector_count
= 135;
65 flash_identify(uncached((void *)CFG_FLASH_BASE
), &flash_info
[0]);
67 for (i
= 0, addr
= 0; i
< 8; i
++, addr
+= 0x2000)
68 flash_info
[0].start
[i
] = addr
;
69 for (; i
< flash_info
[0].sector_count
; i
++, addr
+= 0x10000)
70 flash_info
[0].start
[i
] = addr
;
72 return CFG_FLASH_SIZE
;
75 void flash_print_info(flash_info_t
*info
)
77 printf("Flash: Vendor ID: 0x%02x, Product ID: 0x%02x\n",
78 info
->flash_id
>> 16, info
->flash_id
& 0xffff);
79 printf("Size: %ld MB in %d sectors\n",
80 info
->size
>> 10, info
->sector_count
);
83 int __flashprog
flash_erase(flash_info_t
*info
, int s_first
, int s_last
)
86 unsigned long start_time
;
92 if ((s_first
< 0) || (s_first
> s_last
)
93 || (s_last
>= info
->sector_count
)) {
94 puts("Error: first and/or last sector out of range\n");
98 for (i
= s_first
; i
< s_last
; i
++)
99 if (info
->protect
[i
]) {
100 printf("Error: sector %d is protected\n", i
);
101 return ERR_PROTECTED
;
104 fb
= (uint16_t *)uncached(info
->start
[0]);
106 dcache_flush_unlocked();
108 for (i
= s_first
; (i
<= s_last
) && !ctrlc(); i
++) {
109 printf("Erasing sector %3d...", i
);
111 sb
= (uint16_t *)uncached(info
->start
[i
]);
113 flags
= disable_interrupts();
115 start_time
= get_timer(0);
118 writew(0xaa, fb
+ 0x555);
122 writew(0xaa, fb
+ 0x555);
123 writew(0x55, fb
+ 0xaaa);
124 writew(0x80, fb
+ 0x555);
125 writew(0xaa, fb
+ 0x555);
126 writew(0x55, fb
+ 0xaaa);
129 /* Wait for completion */
134 } while ((status
!= 0xffff) && !(status
& 0x28));
139 * Make sure the command actually makes it to the bus
140 * before we re-enable interrupts.
147 if (status
!= 0xffff) {
148 printf("Flash erase error at address 0x%p: 0x%02x\n",
150 ret
= ERR_PROG_ERROR
;
156 printf("User interrupt!\n");
161 int __flashprog
write_buff(flash_info_t
*info
, uchar
*src
,
162 ulong addr
, ulong count
)
165 uint16_t *base
, *p
, *s
, *end
;
166 uint16_t word
, status
;
169 if (addr
< info
->start
[0]
170 || (addr
+ count
) > (info
->start
[0] + info
->size
)
171 || (addr
+ count
) < addr
) {
172 puts("Error: invalid address range\n");
176 if (addr
& 1 || count
& 1 || (unsigned int)src
& 1) {
177 puts("Error: misaligned source, destination or count\n");
181 base
= (uint16_t *)uncached(info
->start
[0]);
182 end
= (uint16_t *)uncached(addr
+ count
);
184 flags
= disable_interrupts();
186 dcache_flush_unlocked();
189 for (p
= (uint16_t *)uncached(addr
), s
= (uint16_t *)src
;
190 p
< end
&& !ctrlc(); p
++, s
++) {
193 writew(0xaa, base
+ 0x555);
194 writew(0x55, base
+ 0xaaa);
195 writew(0xa0, base
+ 0x555);
200 /* Wait for completion */
204 } while ((status
!= word
) && !(status
& 0x28));
209 if (status
!= word
) {
210 printf("Flash write error at address 0x%p: 0x%02x\n",
212 ret
= ERR_PROG_ERROR
;
223 #endif /* CONFIG_ATSTK1000_EXT_FLASH */