1 /* 2 * (C) Copyright 2008 3 * Heiko Schocher, DENX Software Engineering, hs@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 #if defined(CONFIG_MGCOGE) 26 #include <mpc8260.h> 27 #endif 28 #include <ioports.h> 29 #include <malloc.h> 30 #include <hush.h> 31 #include <net.h> 32 #include <asm/io.h> 33 34 #if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT) 35 #include <libfdt.h> 36 #endif 37 38 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C) 39 #include <i2c.h> 40 41 extern int i2c_soft_read_pin (void); 42 43 int ivm_calc_crc (unsigned char *buf, int len) 44 { 45 const unsigned short crc_tab[16] = { 46 0x0000, 0xCC01, 0xD801, 0x1400, 47 0xF001, 0x3C00, 0x2800, 0xE401, 48 0xA001, 0x6C00, 0x7800, 0xB401, 49 0x5000, 0x9C01, 0x8801, 0x4400}; 50 51 unsigned short crc = 0; /* final result */ 52 unsigned short r1 = 0; /* temp */ 53 unsigned char byte = 0; /* input buffer */ 54 int i; 55 56 /* calculate CRC from array data */ 57 for (i = 0; i < len; i++) { 58 byte = buf[i]; 59 60 /* lower 4 bits */ 61 r1 = crc_tab[crc & 0xF]; 62 crc = ((crc) >> 4) & 0x0FFF; 63 crc = crc ^ r1 ^ crc_tab[byte & 0xF]; 64 65 /* upper 4 bits */ 66 r1 = crc_tab[crc & 0xF]; 67 crc = (crc >> 4) & 0x0FFF; 68 crc = crc ^ r1 ^ crc_tab[(byte >> 4) & 0xF]; 69 } 70 return crc; 71 } 72 73 static int ivm_set_value (char *name, char *value) 74 { 75 char tempbuf[256]; 76 77 if (value != NULL) { 78 sprintf (tempbuf, "%s=%s", name, value); 79 return set_local_var (tempbuf, 0); 80 } else { 81 unset_local_var (name); 82 } 83 return 0; 84 } 85 86 static int ivm_get_value (unsigned char *buf, int len, char *name, int off, 87 int check) 88 { 89 unsigned short val; 90 unsigned char valbuf[30]; 91 92 if ((buf[off + 0] != buf[off + 2]) && 93 (buf[off + 2] != buf[off + 4])) { 94 printf ("%s Error corrupted %s\n", __FUNCTION__, name); 95 val = -1; 96 } else { 97 val = buf[off + 0] + (buf[off + 1] << 8); 98 if ((val == 0) && (check == 1)) 99 val = -1; 100 } 101 sprintf ((char *)valbuf, "%x", val); 102 ivm_set_value (name, (char *)valbuf); 103 return val; 104 } 105 106 #define INVENTORYBLOCKSIZE 0x100 107 #define INVENTORYDATAADDRESS 0x21 108 #define INVENTORYDATASIZE (INVENTORYBLOCKSIZE - INVENTORYDATAADDRESS - 3) 109 110 #define IVM_POS_SHORT_TEXT 0 111 #define IVM_POS_MANU_ID 1 112 #define IVM_POS_MANU_SERIAL 2 113 #define IVM_POS_PART_NUMBER 3 114 #define IVM_POS_BUILD_STATE 4 115 #define IVM_POS_SUPPLIER_PART_NUMBER 5 116 #define IVM_POS_DELIVERY_DATE 6 117 #define IVM_POS_SUPPLIER_BUILD_STATE 7 118 #define IVM_POS_CUSTOMER_ID 8 119 #define IVM_POS_CUSTOMER_PROD_ID 9 120 #define IVM_POS_HISTORY 10 121 #define IVM_POS_SYMBOL_ONLY 11 122 123 static char convert_char (char c) 124 { 125 return (c < ' ' || c > '~') ? '.' : c; 126 } 127 128 static int ivm_findinventorystring (int type, 129 unsigned char* const string, 130 unsigned long maxlen, 131 unsigned char *buf) 132 { 133 int xcode = 0; 134 unsigned long cr = 0; 135 unsigned long addr = INVENTORYDATAADDRESS; 136 unsigned long size = 0; 137 unsigned long nr = type; 138 int stop = 0; /* stop on semicolon */ 139 140 memset(string, '\0', maxlen); 141 switch (type) { 142 case IVM_POS_SYMBOL_ONLY: 143 nr = 0; 144 stop= 1; 145 break; 146 default: 147 nr = type; 148 stop = 0; 149 } 150 151 /* Look for the requested number of CR. */ 152 while ((cr != nr) && (addr < INVENTORYDATASIZE)) { 153 if ((buf[addr] == '\r')) { 154 cr++; 155 } 156 addr++; 157 } 158 159 /* the expected number of CR was found until the end of the IVM 160 * content --> fill string */ 161 if (addr < INVENTORYDATASIZE) { 162 /* Copy the IVM string in the corresponding string */ 163 for (; (buf[addr] != '\r') && 164 ((buf[addr] != ';') || (!stop)) && 165 (size < (maxlen - 1) && 166 (addr < INVENTORYDATASIZE)); addr++) 167 { 168 size += sprintf((char *)string + size, "%c", 169 convert_char (buf[addr])); 170 } 171 172 /* copy phase is done: check if everything is ok. If not, 173 * the inventory data is most probably corrupted: tell 174 * the world there is a problem! */ 175 if (addr == INVENTORYDATASIZE) { 176 xcode = -1; 177 printf ("Error end of string not found\n"); 178 } else if ((size >= (maxlen - 1)) && 179 (buf[addr] != '\r')) { 180 xcode = -1; 181 printf ("string too long till next CR\n"); 182 } 183 } else { 184 /* some CR are missing... 185 * the inventory data is most probably corrupted */ 186 xcode = -1; 187 printf ("not enough cr found\n"); 188 } 189 return xcode; 190 } 191 192 #define GET_STRING(name, which, len) \ 193 if (ivm_findinventorystring (which, valbuf, len, buf) == 0) { \ 194 ivm_set_value (name, (char *)valbuf); \ 195 } 196 197 static int ivm_check_crc (unsigned char *buf, int block) 198 { 199 unsigned long crc; 200 unsigned long crceeprom; 201 202 crc = ivm_calc_crc (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2); 203 crceeprom = (buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 1] + \ 204 buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2] * 256); 205 if (crc != crceeprom) { 206 printf ("Error CRC Block: %d EEprom: calculated: %lx EEprom: %lx\n", 207 block, crc, crceeprom); 208 return -1; 209 } 210 return 0; 211 } 212 213 static int ivm_analyze_block2 (unsigned char *buf, int len) 214 { 215 unsigned char valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN]; 216 unsigned long count; 217 218 /* IVM_MacAddress */ 219 sprintf ((char *)valbuf, "%02X:%02X:%02X:%02X:%02X:%02X", 220 buf[1], 221 buf[2], 222 buf[3], 223 buf[4], 224 buf[5], 225 buf[6]); 226 ivm_set_value ("IVM_MacAddress", (char *)valbuf); 227 if (getenv ("ethaddr") == NULL) 228 setenv ((char *)"ethaddr", (char *)valbuf); 229 /* IVM_MacCount */ 230 count = (buf[10] << 24) + 231 (buf[11] << 16) + 232 (buf[12] << 8) + 233 buf[13]; 234 if (count == 0xffffffff) 235 count = 1; 236 sprintf ((char *)valbuf, "%lx", count); 237 ivm_set_value ("IVM_MacCount", (char *)valbuf); 238 return 0; 239 } 240 241 int ivm_analyze_eeprom (unsigned char *buf, int len) 242 { 243 unsigned short val; 244 unsigned char valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN]; 245 unsigned char *tmp; 246 247 if (ivm_check_crc (buf, 0) != 0) 248 return -1; 249 250 ivm_get_value (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, "IVM_BoardId", 0, 1); 251 val = ivm_get_value (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, "IVM_HWKey", 6, 1); 252 if (val != 0xffff) { 253 sprintf ((char *)valbuf, "%x", ((val /100) % 10)); 254 ivm_set_value ("IVM_HWVariant", (char *)valbuf); 255 sprintf ((char *)valbuf, "%x", (val % 100)); 256 ivm_set_value ("IVM_HWVersion", (char *)valbuf); 257 } 258 ivm_get_value (buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN, "IVM_Functions", 12, 0); 259 260 GET_STRING("IVM_Symbol", IVM_POS_SYMBOL_ONLY, 8) 261 GET_STRING("IVM_DeviceName", IVM_POS_SHORT_TEXT, 64) 262 tmp = (unsigned char *) getenv("IVM_DeviceName"); 263 if (tmp) { 264 int len = strlen ((char *)tmp); 265 int i = 0; 266 267 while (i < len) { 268 if (tmp[i] == ';') { 269 ivm_set_value ("IVM_ShortText", (char *)&tmp[i + 1]); 270 break; 271 } 272 i++; 273 } 274 if (i >= len) 275 ivm_set_value ("IVM_ShortText", NULL); 276 } else { 277 ivm_set_value ("IVM_ShortText", NULL); 278 } 279 GET_STRING("IVM_ManufacturerID", IVM_POS_MANU_ID, 32) 280 GET_STRING("IVM_ManufacturerSerialNumber", IVM_POS_MANU_SERIAL, 20) 281 GET_STRING("IVM_ManufacturerPartNumber", IVM_POS_PART_NUMBER, 32) 282 GET_STRING("IVM_ManufacturerBuildState", IVM_POS_BUILD_STATE, 32) 283 GET_STRING("IVM_SupplierPartNumber", IVM_POS_SUPPLIER_PART_NUMBER, 32) 284 GET_STRING("IVM_DelieveryDate", IVM_POS_DELIVERY_DATE, 32) 285 GET_STRING("IVM_SupplierBuildState", IVM_POS_SUPPLIER_BUILD_STATE, 32) 286 GET_STRING("IVM_CustomerID", IVM_POS_CUSTOMER_ID, 32) 287 GET_STRING("IVM_CustomerProductID", IVM_POS_CUSTOMER_PROD_ID, 32) 288 289 if (ivm_check_crc (&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], 2) != 0) 290 return -2; 291 ivm_analyze_block2 (&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], CONFIG_SYS_IVM_EEPROM_PAGE_LEN); 292 293 return 0; 294 } 295 296 int ivm_read_eeprom (void) 297 { 298 #if defined(CONFIG_I2C_MUX) 299 I2C_MUX_DEVICE *dev = NULL; 300 #endif 301 uchar i2c_buffer[CONFIG_SYS_IVM_EEPROM_MAX_LEN]; 302 uchar *buf; 303 unsigned dev_addr = CONFIG_SYS_IVM_EEPROM_ADR; 304 305 #if defined(CONFIG_I2C_MUX) 306 /* First init the Bus, select the Bus */ 307 #if defined(CONFIG_SYS_I2C_IVM_BUS) 308 dev = i2c_mux_ident_muxstring ((uchar *)CONFIG_SYS_I2C_IVM_BUS); 309 #else 310 buf = (unsigned char *) getenv ("EEprom_ivm"); 311 if (buf != NULL) 312 dev = i2c_mux_ident_muxstring (buf); 313 #endif 314 if (dev == NULL) { 315 printf ("Error couldnt add Bus for IVM\n"); 316 return -1; 317 } 318 i2c_set_bus_num (dev->busid); 319 #endif 320 321 buf = (unsigned char *) getenv ("EEprom_ivm_addr"); 322 if (buf != NULL) 323 dev_addr = simple_strtoul ((char *)buf, NULL, 16); 324 325 if (i2c_read(dev_addr, 0, 1, i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN) != 0) { 326 printf ("Error reading EEprom\n"); 327 return -2; 328 } 329 330 return ivm_analyze_eeprom (i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN); 331 } 332 333 #if defined(CONFIG_SYS_I2C_INIT_BOARD) 334 #define DELAY_ABORT_SEQ 62 335 #define DELAY_HALF_PERIOD (500 / (CONFIG_SYS_I2C_SPEED / 1000)) 336 337 #if defined(CONFIG_MGCOGE) 338 #define SDA_MASK 0x00010000 339 #define SCL_MASK 0x00020000 340 static void set_pin (int state, unsigned long mask) 341 { 342 volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3); 343 344 if (state) 345 iop->pdat |= (mask); 346 else 347 iop->pdat &= ~(mask); 348 349 iop->pdir |= (mask); 350 } 351 352 static int get_pin (unsigned long mask) 353 { 354 volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3); 355 356 iop->pdir &= ~(mask); 357 return (0 != (iop->pdat & (mask))); 358 } 359 360 static void set_sda (int state) 361 { 362 set_pin (state, SDA_MASK); 363 } 364 365 static void set_scl (int state) 366 { 367 set_pin (state, SCL_MASK); 368 } 369 370 static int get_sda (void) 371 { 372 return get_pin (SDA_MASK); 373 } 374 375 static int get_scl (void) 376 { 377 return get_pin (SCL_MASK); 378 } 379 380 #if defined(CONFIG_HARD_I2C) 381 static void setports (int gpio) 382 { 383 volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3); 384 385 if (gpio) { 386 iop->ppar &= ~(SDA_MASK | SCL_MASK); 387 iop->podr &= ~(SDA_MASK | SCL_MASK); 388 } else { 389 iop->ppar |= (SDA_MASK | SCL_MASK); 390 iop->pdir &= ~(SDA_MASK | SCL_MASK); 391 iop->podr |= (SDA_MASK | SCL_MASK); 392 } 393 } 394 #endif 395 #endif 396 397 #if defined(CONFIG_KM8XX) 398 static void set_sda (int state) 399 { 400 I2C_SDA(state); 401 } 402 403 static void set_scl (int state) 404 { 405 I2C_SCL(state); 406 } 407 408 static int get_sda (void) 409 { 410 return I2C_READ; 411 } 412 413 static int get_scl (void) 414 { 415 int val; 416 417 *(unsigned short *)(I2C_BASE_DIR) &= ~SCL_CONF; 418 udelay (1); 419 val = *(unsigned char *)(I2C_BASE_PORT); 420 421 return ((val & SCL_BIT) == SCL_BIT); 422 } 423 424 #endif 425 426 static void writeStartSeq (void) 427 { 428 set_sda (1); 429 udelay (DELAY_HALF_PERIOD); 430 set_scl (1); 431 udelay (DELAY_HALF_PERIOD); 432 set_sda (0); 433 udelay (DELAY_HALF_PERIOD); 434 set_scl (0); 435 udelay (DELAY_HALF_PERIOD); 436 } 437 438 /* I2C is a synchronous protocol and resets of the processor in the middle 439 of an access can block the I2C Bus until a powerdown of the full unit is 440 done. This function toggles the SCL until the SCL and SCA line are 441 released, but max. 16 times, after this a I2C start-sequence is sent. 442 This I2C Deblocking mechanism was developed by Keymile in association 443 with Anatech and Atmel in 1998. 444 */ 445 static int i2c_make_abort (void) 446 { 447 int scl_state = 0; 448 int sda_state = 0; 449 int i = 0; 450 int ret = 0; 451 452 if (!get_sda ()) { 453 ret = -1; 454 while (i < 16) { 455 i++; 456 set_scl (0); 457 udelay (DELAY_ABORT_SEQ); 458 set_scl (1); 459 udelay (DELAY_ABORT_SEQ); 460 scl_state = get_scl (); 461 sda_state = get_sda (); 462 if (scl_state && sda_state) { 463 ret = 0; 464 break; 465 } 466 } 467 } 468 if (ret == 0) { 469 for (i =0; i < 5; i++) { 470 writeStartSeq (); 471 } 472 } 473 get_sda (); 474 return ret; 475 } 476 477 /** 478 * i2c_init_board - reset i2c bus. When the board is powercycled during a 479 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions. 480 */ 481 void i2c_init_board(void) 482 { 483 #if defined(CONFIG_HARD_I2C) 484 volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ; 485 volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c; 486 487 /* disable I2C controller first, otherwhise it thinks we want to */ 488 /* talk to the slave port... */ 489 i2c->i2c_i2mod &= ~0x01; 490 491 /* Set the PortPins to GPIO */ 492 setports (1); 493 #endif 494 495 /* Now run the AbortSequence() */ 496 i2c_make_abort (); 497 498 #if defined(CONFIG_HARD_I2C) 499 /* Set the PortPins back to use for I2C */ 500 setports (0); 501 #endif 502 } 503 #endif 504 #endif 505 506 #if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT) 507 int fdt_set_node_and_value (void *blob, 508 char *nodename, 509 char *regname, 510 void *var, 511 int size) 512 { 513 int ret = 0; 514 int nodeoffset = 0; 515 516 nodeoffset = fdt_path_offset (blob, nodename); 517 if (nodeoffset >= 0) { 518 ret = fdt_setprop (blob, nodeoffset, regname, var, 519 size); 520 if (ret < 0) 521 printf("ft_blob_update(): cannot set %s/%s " 522 "property err:%s\n", nodename, regname, 523 fdt_strerror (ret)); 524 } else { 525 printf("ft_blob_update(): cannot find %s node " 526 "err:%s\n", nodename, fdt_strerror (nodeoffset)); 527 } 528 return ret; 529 } 530 #endif 531 532 int ethernet_present (void) 533 { 534 return (in_8((u8 *)CONFIG_SYS_PIGGY_BASE + CONFIG_SYS_SLOT_ID_OFF) & 0x80); 535 } 536 537 int board_eth_init (bd_t *bis) 538 { 539 #ifdef CONFIG_KEYMILE_HDLC_ENET 540 (void)keymile_hdlc_enet_initialize (bis); 541 #endif 542 if (ethernet_present ()) { 543 return -1; 544 } 545 return 0; 546 } 547