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git.ipfire.org Git - people/ms/u-boot.git/blob - common/flash.c
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,
27 #if !defined(CFG_NO_FLASH)
29 extern flash_info_t flash_info
[CFG_MAX_FLASH_BANKS
]; /* info for FLASH chips */
31 /*-----------------------------------------------------------------------
35 /*-----------------------------------------------------------------------
36 * Set protection status for monitor sectors
38 * The monitor is always located in the _first_ Flash bank.
39 * If necessary you have to map the second bank at lower addresses.
42 flash_protect (int flag
, ulong from
, ulong to
, flash_info_t
*info
)
44 ulong b_end
= info
->start
[0] + info
->size
- 1; /* bank end address */
45 short s_end
= info
->sector_count
- 1; /* index of last sector */
48 /* Do nothing if input data is bad. */
49 if (info
->sector_count
== 0 || info
->size
== 0 || to
< from
) {
53 /* There is nothing to do if we have no data about the flash
54 * or the protect range and flash range don't overlap.
56 if (info
->flash_id
== FLASH_UNKNOWN
||
57 to
< info
->start
[0] || from
> b_end
) {
61 for (i
=0; i
<info
->sector_count
; ++i
) {
62 ulong end
; /* last address in current sect */
64 end
= (i
== s_end
) ? b_end
: info
->start
[i
+ 1] - 1;
66 /* Update protection if any part of the sector
67 * is in the specified range.
69 if (from
<= end
&& to
>= info
->start
[i
]) {
70 if (flag
& FLAG_PROTECT_CLEAR
) {
71 #if defined(CFG_FLASH_PROTECTION)
72 flash_real_protect(info
, i
, 0);
75 #endif /* CFG_FLASH_PROTECTION */
77 else if (flag
& FLAG_PROTECT_SET
) {
78 #if defined(CFG_FLASH_PROTECTION)
79 flash_real_protect(info
, i
, 1);
82 #endif /* CFG_FLASH_PROTECTION */
88 /*-----------------------------------------------------------------------
92 addr2info (ulong addr
)
94 #ifndef CONFIG_SPD823TS
98 for (i
=0, info
=&flash_info
[0]; i
<CFG_MAX_FLASH_BANKS
; ++i
, ++info
) {
99 if (info
->flash_id
!= FLASH_UNKNOWN
&&
100 addr
>= info
->start
[0] &&
101 /* WARNING - The '- 1' is needed if the flash
102 * is at the end of the address space, since
103 * info->start[0] + info->size wraps back to 0.
104 * Please don't change this unless you understand this.
106 addr
<= info
->start
[0] + info
->size
- 1) {
110 #endif /* CONFIG_SPD823TS */
115 /*-----------------------------------------------------------------------
116 * Copy memory to flash.
117 * Make sure all target addresses are within Flash bounds,
118 * and no protected sectors are hit.
121 * ERR_TIMOUT 1 - write timeout
122 * ERR_NOT_ERASED 2 - Flash not erased
123 * ERR_PROTECTED 4 - target range includes protected sectors
124 * ERR_INVAL 8 - target address not in Flash memory
125 * ERR_ALIGN 16 - target address not aligned on boundary
126 * (only some targets require alignment)
129 flash_write (uchar
*src
, ulong addr
, ulong cnt
)
131 #ifdef CONFIG_SPD823TS
132 return (ERR_TIMOUT
); /* any other error codes are possible as well */
135 ulong end
= addr
+ cnt
- 1;
136 flash_info_t
*info_first
= addr2info (addr
);
137 flash_info_t
*info_last
= addr2info (end
);
144 if (!info_first
|| !info_last
) {
148 for (info
= info_first
; info
<= info_last
; ++info
) {
149 ulong b_end
= info
->start
[0] + info
->size
; /* bank end addr */
150 short s_end
= info
->sector_count
- 1;
151 for (i
=0; i
<info
->sector_count
; ++i
) {
152 ulong e_addr
= (i
== s_end
) ? b_end
: info
->start
[i
+ 1];
154 if ((end
>= info
->start
[i
]) && (addr
< e_addr
) &&
155 (info
->protect
[i
] != 0) ) {
156 return (ERR_PROTECTED
);
161 /* finally write data to flash */
162 for (info
= info_first
; info
<= info_last
&& cnt
>0; ++info
) {
165 len
= info
->start
[0] + info
->size
- addr
;
168 if ((i
= write_buff(info
, src
, addr
, len
)) != 0) {
176 #endif /* CONFIG_SPD823TS */
179 /*-----------------------------------------------------------------------
182 void flash_perror (int err
)
188 puts ("Timeout writing to Flash\n");
191 puts ("Flash not Erased\n");
194 puts ("Can't write to protected Flash sectors\n");
197 puts ("Outside available Flash\n");
200 puts ("Start and/or end address not on sector boundary\n");
202 case ERR_UNKNOWN_FLASH_VENDOR
:
203 puts ("Unknown Vendor of Flash\n");
205 case ERR_UNKNOWN_FLASH_TYPE
:
206 puts ("Unknown Type of Flash\n");
209 puts ("General Flash Programming Error\n");
212 printf ("%s[%d] FIXME: rc=%d\n", __FILE__
, __LINE__
, err
);
217 /*-----------------------------------------------------------------------
219 #endif /* !CFG_NO_FLASH */