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