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 I2C_MUX_DEVICE *dev = NULL; 299 uchar i2c_buffer[CONFIG_SYS_IVM_EEPROM_MAX_LEN]; 300 uchar *buf; 301 unsigned dev_addr = CONFIG_SYS_IVM_EEPROM_ADR; 302 303 /* First init the Bus, select the Bus */ 304 #if defined(CONFIG_SYS_I2C_IVM_BUS) 305 dev = i2c_mux_ident_muxstring ((uchar *)CONFIG_SYS_I2C_IVM_BUS); 306 #else 307 buf = (unsigned char *) getenv ("EEprom_ivm"); 308 if (buf != NULL) 309 dev = i2c_mux_ident_muxstring (buf); 310 #endif 311 if (dev == NULL) { 312 printf ("Error couldnt add Bus for IVM\n"); 313 return -1; 314 } 315 i2c_set_bus_num (dev->busid); 316 317 buf = (unsigned char *) getenv ("EEprom_ivm_addr"); 318 if (buf != NULL) 319 dev_addr = simple_strtoul ((char *)buf, NULL, 16); 320 321 if (eeprom_read (dev_addr, 0, i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN) != 0) { 322 printf ("Error reading EEprom\n"); 323 return -2; 324 } 325 326 return ivm_analyze_eeprom (i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN); 327 } 328 329 #if defined(CONFIG_SYS_I2C_INIT_BOARD) 330 #define DELAY_ABORT_SEQ 62 331 #define DELAY_HALF_PERIOD (500 / (CONFIG_SYS_I2C_SPEED / 1000)) 332 333 #if defined(CONFIG_MGCOGE) 334 #define SDA_MASK 0x00010000 335 #define SCL_MASK 0x00020000 336 static void set_pin (int state, unsigned long mask) 337 { 338 volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3); 339 340 if (state) 341 iop->pdat |= (mask); 342 else 343 iop->pdat &= ~(mask); 344 345 iop->pdir |= (mask); 346 } 347 348 static int get_pin (unsigned long mask) 349 { 350 volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3); 351 352 iop->pdir &= ~(mask); 353 return (0 != (iop->pdat & (mask))); 354 } 355 356 static void set_sda (int state) 357 { 358 set_pin (state, SDA_MASK); 359 } 360 361 static void set_scl (int state) 362 { 363 set_pin (state, SCL_MASK); 364 } 365 366 static int get_sda (void) 367 { 368 return get_pin (SDA_MASK); 369 } 370 371 static int get_scl (void) 372 { 373 return get_pin (SCL_MASK); 374 } 375 376 #if defined(CONFIG_HARD_I2C) 377 static void setports (int gpio) 378 { 379 volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3); 380 381 if (gpio) { 382 iop->ppar &= ~(SDA_MASK | SCL_MASK); 383 iop->podr &= ~(SDA_MASK | SCL_MASK); 384 } else { 385 iop->ppar |= (SDA_MASK | SCL_MASK); 386 iop->pdir &= ~(SDA_MASK | SCL_MASK); 387 iop->podr |= (SDA_MASK | SCL_MASK); 388 } 389 } 390 #endif 391 #endif 392 393 #if defined(CONFIG_MGSUVD) 394 static void set_sda (int state) 395 { 396 I2C_SDA(state); 397 } 398 399 static void set_scl (int state) 400 { 401 I2C_SCL(state); 402 } 403 404 static int get_sda (void) 405 { 406 return I2C_READ; 407 } 408 409 static int get_scl (void) 410 { 411 int val; 412 413 *(unsigned short *)(I2C_BASE_DIR) &= ~SCL_CONF; 414 udelay (1); 415 val = *(unsigned char *)(I2C_BASE_PORT); 416 417 return ((val & SCL_BIT) == SCL_BIT); 418 } 419 420 #endif 421 422 static void writeStartSeq (void) 423 { 424 set_sda (1); 425 udelay (DELAY_HALF_PERIOD); 426 set_scl (1); 427 udelay (DELAY_HALF_PERIOD); 428 set_sda (0); 429 udelay (DELAY_HALF_PERIOD); 430 set_scl (0); 431 udelay (DELAY_HALF_PERIOD); 432 } 433 434 /* I2C is a synchronous protocol and resets of the processor in the middle 435 of an access can block the I2C Bus until a powerdown of the full unit is 436 done. This function toggles the SCL until the SCL and SCA line are 437 released, but max. 16 times, after this a I2C start-sequence is sent. 438 This I2C Deblocking mechanism was developed by Keymile in association 439 with Anatech and Atmel in 1998. 440 */ 441 static int i2c_make_abort (void) 442 { 443 int scl_state = 0; 444 int sda_state = 0; 445 int i = 0; 446 int ret = 0; 447 448 if (!get_sda ()) { 449 ret = -1; 450 while (i < 16) { 451 i++; 452 set_scl (0); 453 udelay (DELAY_ABORT_SEQ); 454 set_scl (1); 455 udelay (DELAY_ABORT_SEQ); 456 scl_state = get_scl (); 457 sda_state = get_sda (); 458 if (scl_state && sda_state) { 459 ret = 0; 460 break; 461 } 462 } 463 } 464 if (ret == 0) { 465 for (i =0; i < 5; i++) { 466 writeStartSeq (); 467 } 468 } 469 get_sda (); 470 return ret; 471 } 472 473 /** 474 * i2c_init_board - reset i2c bus. When the board is powercycled during a 475 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions. 476 */ 477 void i2c_init_board(void) 478 { 479 #if defined(CONFIG_HARD_I2C) 480 volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ; 481 volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c; 482 483 /* disable I2C controller first, otherwhise it thinks we want to */ 484 /* talk to the slave port... */ 485 i2c->i2c_i2mod &= ~0x01; 486 487 /* Set the PortPins to GPIO */ 488 setports (1); 489 #endif 490 491 /* Now run the AbortSequence() */ 492 i2c_make_abort (); 493 494 #if defined(CONFIG_HARD_I2C) 495 /* Set the PortPins back to use for I2C */ 496 setports (0); 497 #endif 498 } 499 #endif 500 #endif 501 502 #if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT) 503 int fdt_set_node_and_value (void *blob, 504 char *nodename, 505 char *regname, 506 void *var, 507 int size) 508 { 509 int ret = 0; 510 int nodeoffset = 0; 511 512 nodeoffset = fdt_path_offset (blob, nodename); 513 if (nodeoffset >= 0) { 514 ret = fdt_setprop (blob, nodeoffset, regname, var, 515 size); 516 if (ret < 0) 517 printf("ft_blob_update(): cannot set %s/%s " 518 "property err:%s\n", nodename, regname, 519 fdt_strerror (ret)); 520 } else { 521 printf("ft_blob_update(): cannot find %s node " 522 "err:%s\n", nodename, fdt_strerror (nodeoffset)); 523 } 524 return ret; 525 } 526 #endif 527 528 int ethernet_present (void) 529 { 530 return (in_8((u8 *)CONFIG_SYS_PIGGY_BASE + CONFIG_SYS_SLOT_ID_OFF) & 0x80); 531 } 532 533 int board_eth_init (bd_t *bis) 534 { 535 #ifdef CONFIG_KEYMILE_HDLC_ENET 536 (void)keymile_hdlc_enet_initialize (bis); 537 #endif 538 if (ethernet_present ()) { 539 return -1; 540 } 541 return 0; 542 } 543