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(CFG_NO_FLASH) 30 31 extern flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* 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 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 debug ("flash_protect %s: from 0x%08lX to 0x%08lX\n", 51 (flag & FLAG_PROTECT_SET) ? "ON" : 52 (flag & FLAG_PROTECT_CLEAR) ? "OFF" : "???", 53 from, to); 54 55 /* Do nothing if input data is bad. */ 56 if (info->sector_count == 0 || info->size == 0 || to < from) { 57 return; 58 } 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(CFG_FLASH_PROTECTION) 79 flash_real_protect(info, i, 0); 80 #else 81 info->protect[i] = 0; 82 #endif /* CFG_FLASH_PROTECTION */ 83 debug ("protect off %d\n", i); 84 } 85 else if (flag & FLAG_PROTECT_SET) { 86 #if defined(CFG_FLASH_PROTECTION) 87 flash_real_protect(info, i, 1); 88 #else 89 info->protect[i] = 1; 90 #endif /* CFG_FLASH_PROTECTION */ 91 debug ("protect on %d\n", i); 92 } 93 } 94 } 95 } 96 97 /*----------------------------------------------------------------------- 98 */ 99 100 flash_info_t * 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<CFG_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 138 flash_write (uchar *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, 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 */ 190 191 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 /* !CFG_NO_FLASH */ 229