]>
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 flash_info
[0].size
= CFG_FLASH_SIZE
;
59 flash_info
[0].sector_count
= 135;
61 flash_identify(uncached((void *)CFG_FLASH_BASE
), &flash_info
[0]);
63 for (i
= 0, addr
= 0; i
< 8; i
++, addr
+= 0x2000)
64 flash_info
[0].start
[i
] = addr
;
65 for (; i
< flash_info
[0].sector_count
; i
++, addr
+= 0x10000)
66 flash_info
[0].start
[i
] = addr
;
68 return CFG_FLASH_SIZE
;
71 void flash_print_info(flash_info_t
*info
)
73 printf("Flash: Vendor ID: 0x%02x, Product ID: 0x%02x\n",
74 info
->flash_id
>> 16, info
->flash_id
& 0xffff);
75 printf("Size: %ld MB in %d sectors\n",
76 info
->size
>> 10, info
->sector_count
);
79 int __flashprog
flash_erase(flash_info_t
*info
, int s_first
, int s_last
)
82 unsigned long start_time
;
88 if ((s_first
< 0) || (s_first
> s_last
)
89 || (s_last
>= info
->sector_count
)) {
90 puts("Error: first and/or last sector out of range\n");
94 for (i
= s_first
; i
< s_last
; i
++)
95 if (info
->protect
[i
]) {
96 printf("Error: sector %d is protected\n", i
);
100 fb
= (uint16_t *)uncached(info
->start
[0]);
102 dcache_flush_unlocked();
104 for (i
= s_first
; (i
<= s_last
) && !ctrlc(); i
++) {
105 printf("Erasing sector %3d...", i
);
107 sb
= (uint16_t *)uncached(info
->start
[i
]);
109 flags
= disable_interrupts();
111 start_time
= get_timer(0);
114 writew(0xaa, fb
+ 0x555);
118 writew(0xaa, fb
+ 0x555);
119 writew(0x55, fb
+ 0xaaa);
120 writew(0x80, fb
+ 0x555);
121 writew(0xaa, fb
+ 0x555);
122 writew(0x55, fb
+ 0xaaa);
125 /* Wait for completion */
130 } while ((status
!= 0xffff) && !(status
& 0x28));
135 * Make sure the command actually makes it to the bus
136 * before we re-enable interrupts.
143 if (status
!= 0xffff) {
144 printf("Flash erase error at address 0x%p: 0x%02x\n",
146 ret
= ERR_PROG_ERROR
;
152 printf("User interrupt!\n");
157 int __flashprog
write_buff(flash_info_t
*info
, uchar
*src
,
158 ulong addr
, ulong count
)
161 uint16_t *base
, *p
, *s
, *end
;
162 uint16_t word
, status
, status1
;
165 if (addr
< info
->start
[0]
166 || (addr
+ count
) > (info
->start
[0] + info
->size
)
167 || (addr
+ count
) < addr
) {
168 puts("Error: invalid address range\n");
172 if (addr
& 1 || count
& 1 || (unsigned int)src
& 1) {
173 puts("Error: misaligned source, destination or count\n");
177 base
= (uint16_t *)uncached(info
->start
[0]);
178 end
= (uint16_t *)uncached(addr
+ count
);
180 flags
= disable_interrupts();
182 dcache_flush_unlocked();
185 for (p
= (uint16_t *)uncached(addr
), s
= (uint16_t *)src
;
186 p
< end
&& !ctrlc(); p
++, s
++) {
189 writew(0xaa, base
+ 0x555);
190 writew(0x55, base
+ 0xaaa);
191 writew(0xa0, base
+ 0x555);
196 /* Wait for completion */
202 } while (((status
^ status1
) & 0x40) /* toggled */
203 && !(status1
& 0x28)); /* error bits */
206 * We'll need to check once again for toggle bit
207 * because the toggle bit may stop toggling as I/O5
208 * changes to "1" (ref at49bv642.pdf p9)
212 if ((status
^ status1
) & 0x40) {
213 printf("Flash write error at address 0x%p: "
214 "0x%02x != 0x%02x\n",
216 ret
= ERR_PROG_ERROR
;
232 #endif /* CONFIG_ATSTK1000_EXT_FLASH */