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 #include <mtd/cfi_flash.h> 31 32 extern flash_info_t flash_info[]; /* info for FLASH chips */ 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 */ 44 void 45 flash_protect (int flag, ulong from, ulong to, flash_info_t *info) 46 { 47 ulong b_end; 48 short s_end; 49 int i; 50 51 /* Do nothing if input data is bad. */ 52 if (!info || info->sector_count == 0 || info->size == 0 || to < from) { 53 return; 54 } 55 56 s_end = info->sector_count - 1; /* index of last sector */ 57 b_end = info->start[0] + info->size - 1; /* bank end address */ 58 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 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) { 82 #if defined(CONFIG_SYS_FLASH_PROTECTION) 83 flash_real_protect(info, i, 0); 84 #else 85 info->protect[i] = 0; 86 #endif /* CONFIG_SYS_FLASH_PROTECTION */ 87 debug ("protect off %d\n", i); 88 } 89 else if (flag & FLAG_PROTECT_SET) { 90 #if defined(CONFIG_SYS_FLASH_PROTECTION) 91 flash_real_protect(info, i, 1); 92 #else 93 info->protect[i] = 1; 94 #endif /* CONFIG_SYS_FLASH_PROTECTION */ 95 debug ("protect on %d\n", i); 96 } 97 } 98 } 99 } 100 101 /*----------------------------------------------------------------------- 102 */ 103 104 flash_info_t * 105 addr2info (ulong addr) 106 { 107 #ifndef CONFIG_SPD823TS 108 flash_info_t *info; 109 int i; 110 111 for (i=0, info = &flash_info[0]; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i, ++info) { 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 */ 141 int 142 flash_write (char *src, ulong addr, ulong cnt) 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; 181 if ((i = write_buff(info, (uchar *)src, addr, len)) != 0) { 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 */ 194 195 void 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 case ERR_ABORTED: 225 puts("Flash Programming Aborted\n"); 226 break; 227 default: 228 printf ("%s[%d] FIXME: rc=%d\n", __FILE__, __LINE__, err); 229 break; 230 } 231 } 232 233 /*----------------------------------------------------------------------- 234 */ 235 #endif /* !CONFIG_SYS_NO_FLASH */ 236