1 /* 2 * (C) Copyright 2000-2003 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 26 #define PHYS_FLASH_1 CONFIG_SYS_FLASH_BASE 27 #define FLASH_BANK_SIZE 0x200000 28 29 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; 30 31 void flash_print_info (flash_info_t * info) 32 { 33 int i; 34 35 switch (info->flash_id & FLASH_VENDMASK) { 36 case (AMD_MANUFACT & FLASH_VENDMASK): 37 printf ("AMD: "); 38 break; 39 default: 40 printf ("Unknown Vendor "); 41 break; 42 } 43 44 switch (info->flash_id & FLASH_TYPEMASK) { 45 case (AMD_ID_PL160CB & FLASH_TYPEMASK): 46 printf ("AM29PL160CB (16Mbit)\n"); 47 break; 48 default: 49 printf ("Unknown Chip Type\n"); 50 goto Done; 51 break; 52 } 53 54 printf (" Size: %ld MB in %d Sectors\n", 55 info->size >> 20, info->sector_count); 56 57 printf (" Sector Start Addresses:"); 58 for (i = 0; i < info->sector_count; i++) { 59 if ((i % 5) == 0) { 60 printf ("\n "); 61 } 62 printf (" %08lX%s", info->start[i], 63 info->protect[i] ? " (RO)" : " "); 64 } 65 printf ("\n"); 66 67 Done: 68 return; 69 } 70 71 72 unsigned long flash_init (void) 73 { 74 int i, j; 75 ulong size = 0; 76 77 for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) { 78 ulong flashbase = 0; 79 80 flash_info[i].flash_id = 81 (AMD_MANUFACT & FLASH_VENDMASK) | 82 (AMD_ID_PL160CB & FLASH_TYPEMASK); 83 flash_info[i].size = FLASH_BANK_SIZE; 84 flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT; 85 memset (flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT); 86 if (i == 0) 87 flashbase = PHYS_FLASH_1; 88 else 89 panic ("configured to many flash banks!\n"); 90 91 for (j = 0; j < flash_info[i].sector_count; j++) { 92 if (j == 0) { 93 /* 1st is 16 KiB */ 94 flash_info[i].start[j] = flashbase; 95 } 96 if ((j >= 1) && (j <= 2)) { 97 /* 2nd and 3rd are 8 KiB */ 98 flash_info[i].start[j] = 99 flashbase + 0x4000 + 0x2000 * (j - 1); 100 } 101 if (j == 3) { 102 /* 4th is 224 KiB */ 103 flash_info[i].start[j] = flashbase + 0x8000; 104 } 105 if ((j >= 4) && (j <= 10)) { 106 /* rest is 256 KiB */ 107 flash_info[i].start[j] = 108 flashbase + 0x40000 + 0x40000 * (j - 109 4); 110 } 111 } 112 size += flash_info[i].size; 113 } 114 115 flash_protect (FLAG_PROTECT_SET, 116 CONFIG_SYS_FLASH_BASE, 117 CONFIG_SYS_FLASH_BASE + 0x3ffff, &flash_info[0]); 118 119 return size; 120 } 121 122 123 #define CMD_READ_ARRAY 0x00F0 124 #define CMD_UNLOCK1 0x00AA 125 #define CMD_UNLOCK2 0x0055 126 #define CMD_ERASE_SETUP 0x0080 127 #define CMD_ERASE_CONFIRM 0x0030 128 #define CMD_PROGRAM 0x00A0 129 #define CMD_UNLOCK_BYPASS 0x0020 130 131 #define MEM_FLASH_ADDR1 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x00000555<<1))) 132 #define MEM_FLASH_ADDR2 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x000002AA<<1))) 133 134 #define BIT_ERASE_DONE 0x0080 135 #define BIT_RDY_MASK 0x0080 136 #define BIT_PROGRAM_ERROR 0x0020 137 #define BIT_TIMEOUT 0x80000000 /* our flag */ 138 139 #define READY 1 140 #define ERR 2 141 #define TMO 4 142 143 144 int flash_erase (flash_info_t * info, int s_first, int s_last) 145 { 146 ulong result; 147 int iflag, cflag, prot, sect; 148 int rc = ERR_OK; 149 int chip1; 150 ulong start; 151 152 /* first look for protection bits */ 153 154 if (info->flash_id == FLASH_UNKNOWN) 155 return ERR_UNKNOWN_FLASH_TYPE; 156 157 if ((s_first < 0) || (s_first > s_last)) { 158 return ERR_INVAL; 159 } 160 161 if ((info->flash_id & FLASH_VENDMASK) != 162 (AMD_MANUFACT & FLASH_VENDMASK)) { 163 return ERR_UNKNOWN_FLASH_VENDOR; 164 } 165 166 prot = 0; 167 for (sect = s_first; sect <= s_last; ++sect) { 168 if (info->protect[sect]) { 169 prot++; 170 } 171 } 172 if (prot) 173 return ERR_PROTECTED; 174 175 /* 176 * Disable interrupts which might cause a timeout 177 * here. Remember that our exception vectors are 178 * at address 0 in the flash, and we don't want a 179 * (ticker) exception to happen while the flash 180 * chip is in programming mode. 181 */ 182 183 cflag = icache_status (); 184 icache_disable (); 185 iflag = disable_interrupts (); 186 187 printf ("\n"); 188 189 /* Start erase on unprotected sectors */ 190 for (sect = s_first; sect <= s_last && !ctrlc (); sect++) { 191 printf ("Erasing sector %2d ... ", sect); 192 193 /* arm simple, non interrupt dependent timer */ 194 start = get_timer(0); 195 196 if (info->protect[sect] == 0) { /* not protected */ 197 volatile u16 *addr = 198 (volatile u16 *) (info->start[sect]); 199 200 MEM_FLASH_ADDR1 = CMD_UNLOCK1; 201 MEM_FLASH_ADDR2 = CMD_UNLOCK2; 202 MEM_FLASH_ADDR1 = CMD_ERASE_SETUP; 203 204 MEM_FLASH_ADDR1 = CMD_UNLOCK1; 205 MEM_FLASH_ADDR2 = CMD_UNLOCK2; 206 *addr = CMD_ERASE_CONFIRM; 207 208 /* wait until flash is ready */ 209 chip1 = 0; 210 211 do { 212 result = *addr; 213 214 /* check timeout */ 215 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) { 216 MEM_FLASH_ADDR1 = CMD_READ_ARRAY; 217 chip1 = TMO; 218 break; 219 } 220 221 if (!chip1 222 && (result & 0xFFFF) & BIT_ERASE_DONE) 223 chip1 = READY; 224 225 } while (!chip1); 226 227 MEM_FLASH_ADDR1 = CMD_READ_ARRAY; 228 229 if (chip1 == ERR) { 230 rc = ERR_PROG_ERROR; 231 goto outahere; 232 } 233 if (chip1 == TMO) { 234 rc = ERR_TIMOUT; 235 goto outahere; 236 } 237 238 printf ("ok.\n"); 239 } else { /* it was protected */ 240 241 printf ("protected!\n"); 242 } 243 } 244 245 if (ctrlc ()) 246 printf ("User Interrupt!\n"); 247 248 outahere: 249 /* allow flash to settle - wait 10 ms */ 250 udelay (10000); 251 252 if (iflag) 253 enable_interrupts (); 254 255 if (cflag) 256 icache_enable (); 257 258 return rc; 259 } 260 261 static int write_word (flash_info_t * info, ulong dest, ulong data) 262 { 263 volatile u16 *addr = (volatile u16 *) dest; 264 ulong result; 265 int rc = ERR_OK; 266 int cflag, iflag; 267 int chip1; 268 ulong start; 269 270 /* 271 * Check if Flash is (sufficiently) erased 272 */ 273 result = *addr; 274 if ((result & data) != data) 275 return ERR_NOT_ERASED; 276 277 278 /* 279 * Disable interrupts which might cause a timeout 280 * here. Remember that our exception vectors are 281 * at address 0 in the flash, and we don't want a 282 * (ticker) exception to happen while the flash 283 * chip is in programming mode. 284 */ 285 286 cflag = icache_status (); 287 icache_disable (); 288 iflag = disable_interrupts (); 289 290 MEM_FLASH_ADDR1 = CMD_UNLOCK1; 291 MEM_FLASH_ADDR2 = CMD_UNLOCK2; 292 MEM_FLASH_ADDR1 = CMD_PROGRAM; 293 *addr = data; 294 295 /* arm simple, non interrupt dependent timer */ 296 start = get_timer(0); 297 298 /* wait until flash is ready */ 299 chip1 = 0; 300 do { 301 result = *addr; 302 303 /* check timeout */ 304 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) { 305 chip1 = ERR | TMO; 306 break; 307 } 308 if (!chip1 && ((result & 0x80) == (data & 0x80))) 309 chip1 = READY; 310 311 } while (!chip1); 312 313 *addr = CMD_READ_ARRAY; 314 315 if (chip1 == ERR || *addr != data) 316 rc = ERR_PROG_ERROR; 317 318 if (iflag) 319 enable_interrupts (); 320 321 if (cflag) 322 icache_enable (); 323 324 return rc; 325 } 326 327 328 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) 329 { 330 ulong wp, data; 331 int rc; 332 333 if (addr & 1) { 334 printf ("unaligned destination not supported\n"); 335 return ERR_ALIGN; 336 } 337 338 #if 0 339 if (cnt & 1) { 340 printf ("odd transfer sizes not supported\n"); 341 return ERR_ALIGN; 342 } 343 #endif 344 345 wp = addr; 346 347 if (addr & 1) { 348 data = (*((volatile u8 *) addr) << 8) | *((volatile u8 *) 349 src); 350 if ((rc = write_word (info, wp - 1, data)) != 0) { 351 return (rc); 352 } 353 src += 1; 354 wp += 1; 355 cnt -= 1; 356 } 357 358 while (cnt >= 2) { 359 data = *((volatile u16 *) src); 360 if ((rc = write_word (info, wp, data)) != 0) { 361 return (rc); 362 } 363 src += 2; 364 wp += 2; 365 cnt -= 2; 366 } 367 368 if (cnt == 1) { 369 data = (*((volatile u8 *) src) << 8) | 370 *((volatile u8 *) (wp + 1)); 371 if ((rc = write_word (info, wp, data)) != 0) { 372 return (rc); 373 } 374 src += 1; 375 wp += 1; 376 cnt -= 1; 377 } 378 379 return ERR_OK; 380 } 381