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Merge branch 'master' of git://git.denx.de/u-boot-mmc
[people/ms/u-boot.git] / common / flash.c
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1/*
2 * (C) Copyright 2000
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
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.
12 *
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.
17 *
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,
21 * MA 02111-1307 USA
22 */
23
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24/* #define DEBUG */
25
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26#include <common.h>
27#include <flash.h>
28
6d0f6bcf 29#if !defined(CONFIG_SYS_NO_FLASH)
ca5def3f 30#include <mtd/cfi_flash.h>
affae2bf 31
e6f2e902 32extern flash_info_t flash_info[]; /* info for FLASH chips */
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33
34/*-----------------------------------------------------------------------
35 * Functions
36 */
37
38/*-----------------------------------------------------------------------
39 * Set protection status for monitor sectors
40 *
41 * The monitor is always located in the _first_ Flash bank.
42 * If necessary you have to map the second bank at lower addresses.
43 */
44void
45flash_protect (int flag, ulong from, ulong to, flash_info_t *info)
46{
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47 ulong b_end;
48 short s_end;
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49 int i;
50
51 /* Do nothing if input data is bad. */
a4e8d9f5 52 if (!info || info->sector_count == 0 || info->size == 0 || to < from) {
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53 return;
54 }
55
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56 s_end = info->sector_count - 1; /* index of last sector */
57 b_end = info->start[0] + info->size - 1; /* bank end address */
58
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59 debug ("flash_protect %s: from 0x%08lX to 0x%08lX\n",
60 (flag & FLAG_PROTECT_SET) ? "ON" :
61 (flag & FLAG_PROTECT_CLEAR) ? "OFF" : "???",
62 from, to);
63
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64 /* There is nothing to do if we have no data about the flash
65 * or the protect range and flash range don't overlap.
66 */
67 if (info->flash_id == FLASH_UNKNOWN ||
68 to < info->start[0] || from > b_end) {
69 return;
70 }
71
72 for (i=0; i<info->sector_count; ++i) {
73 ulong end; /* last address in current sect */
74
75 end = (i == s_end) ? b_end : info->start[i + 1] - 1;
76
77 /* Update protection if any part of the sector
78 * is in the specified range.
79 */
80 if (from <= end && to >= info->start[i]) {
81 if (flag & FLAG_PROTECT_CLEAR) {
6d0f6bcf 82#if defined(CONFIG_SYS_FLASH_PROTECTION)
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83 flash_real_protect(info, i, 0);
84#else
85 info->protect[i] = 0;
6d0f6bcf 86#endif /* CONFIG_SYS_FLASH_PROTECTION */
7e780369 87 debug ("protect off %d\n", i);
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88 }
89 else if (flag & FLAG_PROTECT_SET) {
6d0f6bcf 90#if defined(CONFIG_SYS_FLASH_PROTECTION)
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91 flash_real_protect(info, i, 1);
92#else
93 info->protect[i] = 1;
6d0f6bcf 94#endif /* CONFIG_SYS_FLASH_PROTECTION */
7e780369 95 debug ("protect on %d\n", i);
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96 }
97 }
98 }
99}
100
101/*-----------------------------------------------------------------------
102 */
103
104flash_info_t *
105addr2info (ulong addr)
106{
107#ifndef CONFIG_SPD823TS
108 flash_info_t *info;
109 int i;
110
6d0f6bcf 111 for (i=0, info = &flash_info[0]; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i, ++info) {
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112 if (info->flash_id != FLASH_UNKNOWN &&
113 addr >= info->start[0] &&
114 /* WARNING - The '- 1' is needed if the flash
115 * is at the end of the address space, since
116 * info->start[0] + info->size wraps back to 0.
117 * Please don't change this unless you understand this.
118 */
119 addr <= info->start[0] + info->size - 1) {
120 return (info);
121 }
122 }
123#endif /* CONFIG_SPD823TS */
124
125 return (NULL);
126}
127
128/*-----------------------------------------------------------------------
129 * Copy memory to flash.
130 * Make sure all target addresses are within Flash bounds,
131 * and no protected sectors are hit.
132 * Returns:
133 * ERR_OK 0 - OK
134 * ERR_TIMOUT 1 - write timeout
135 * ERR_NOT_ERASED 2 - Flash not erased
136 * ERR_PROTECTED 4 - target range includes protected sectors
137 * ERR_INVAL 8 - target address not in Flash memory
138 * ERR_ALIGN 16 - target address not aligned on boundary
139 * (only some targets require alignment)
140 */
141int
77ddac94 142flash_write (char *src, ulong addr, ulong cnt)
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143{
144#ifdef CONFIG_SPD823TS
145 return (ERR_TIMOUT); /* any other error codes are possible as well */
146#else
147 int i;
148 ulong end = addr + cnt - 1;
149 flash_info_t *info_first = addr2info (addr);
150 flash_info_t *info_last = addr2info (end );
151 flash_info_t *info;
152
153 if (cnt == 0) {
154 return (ERR_OK);
155 }
156
157 if (!info_first || !info_last) {
158 return (ERR_INVAL);
159 }
160
161 for (info = info_first; info <= info_last; ++info) {
162 ulong b_end = info->start[0] + info->size; /* bank end addr */
163 short s_end = info->sector_count - 1;
164 for (i=0; i<info->sector_count; ++i) {
165 ulong e_addr = (i == s_end) ? b_end : info->start[i + 1];
166
167 if ((end >= info->start[i]) && (addr < e_addr) &&
168 (info->protect[i] != 0) ) {
169 return (ERR_PROTECTED);
170 }
171 }
172 }
173
174 /* finally write data to flash */
175 for (info = info_first; info <= info_last && cnt>0; ++info) {
176 ulong len;
177
178 len = info->start[0] + info->size - addr;
179 if (len > cnt)
180 len = cnt;
77ddac94 181 if ((i = write_buff(info, (uchar *)src, addr, len)) != 0) {
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182 return (i);
183 }
184 cnt -= len;
185 addr += len;
186 src += len;
187 }
188 return (ERR_OK);
189#endif /* CONFIG_SPD823TS */
190}
191
192/*-----------------------------------------------------------------------
193 */
194
195void flash_perror (int err)
196{
197 switch (err) {
198 case ERR_OK:
199 break;
200 case ERR_TIMOUT:
201 puts ("Timeout writing to Flash\n");
202 break;
203 case ERR_NOT_ERASED:
204 puts ("Flash not Erased\n");
205 break;
206 case ERR_PROTECTED:
207 puts ("Can't write to protected Flash sectors\n");
208 break;
209 case ERR_INVAL:
210 puts ("Outside available Flash\n");
211 break;
212 case ERR_ALIGN:
213 puts ("Start and/or end address not on sector boundary\n");
214 break;
215 case ERR_UNKNOWN_FLASH_VENDOR:
216 puts ("Unknown Vendor of Flash\n");
217 break;
218 case ERR_UNKNOWN_FLASH_TYPE:
219 puts ("Unknown Type of Flash\n");
220 break;
221 case ERR_PROG_ERROR:
222 puts ("General Flash Programming Error\n");
223 break;
224 default:
225 printf ("%s[%d] FIXME: rc=%d\n", __FILE__, __LINE__, err);
226 break;
227 }
228}
229
230/*-----------------------------------------------------------------------
231 */
6d0f6bcf 232#endif /* !CONFIG_SYS_NO_FLASH */