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