1 /* 2 * (C) Copyright 2008 3 * Heiko Schocher, DENX Software Engineering, hs@denx.de. 4 * 5 * (C) Copyright 2011 6 * Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.com 7 * 8 * See file CREDITS for list of people who contributed to this 9 * project. 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License as 13 * published by the Free Software Foundation; either version 2 of 14 * the License, or (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 24 * MA 02111-1307 USA 25 */ 26 27 #include <common.h> 28 #if defined(CONFIG_KM82XX) 29 #include <mpc8260.h> 30 #endif 31 #include <ioports.h> 32 #include <command.h> 33 #include <malloc.h> 34 #include <hush.h> 35 #include <net.h> 36 #include <netdev.h> 37 #include <asm/io.h> 38 #include <linux/ctype.h> 39 40 #if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT) 41 #include <libfdt.h> 42 #endif 43 44 #include "common.h" 45 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C) 46 #include <i2c.h> 47 48 static void i2c_write_start_seq(void); 49 DECLARE_GLOBAL_DATA_PTR; 50 51 /* 52 * Set Keymile specific environment variables 53 * Currently only some memory layout variables are calculated here 54 * ... ------------------------------------------------ 55 * ... |@rootfsaddr |@pnvramaddr |@varaddr |@reserved |@END_OF_RAM 56 * ... |<------------------- pram ------------------->| 57 * ... ------------------------------------------------ 58 * @END_OF_RAM: denotes the RAM size 59 * @pnvramaddr: Startadress of pseudo non volatile RAM in hex 60 * @pram : preserved ram size in k 61 * @varaddr : startadress for /var mounted into RAM 62 */ 63 int set_km_env(void) 64 { 65 uchar buf[32]; 66 unsigned int pnvramaddr; 67 unsigned int pram; 68 unsigned int varaddr; 69 70 pnvramaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM 71 - CONFIG_KM_PNVRAM; 72 sprintf((char *)buf, "0x%x", pnvramaddr); 73 setenv("pnvramaddr", (char *)buf); 74 75 pram = (CONFIG_KM_RESERVED_PRAM + CONFIG_KM_PHRAM + CONFIG_KM_PNVRAM) / 76 0x400; 77 sprintf((char *)buf, "0x%x", pram); 78 setenv("pram", (char *)buf); 79 80 varaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM; 81 sprintf((char *)buf, "0x%x", varaddr); 82 setenv("varaddr", (char *)buf); 83 return 0; 84 } 85 86 #if defined(CONFIG_SYS_I2C_INIT_BOARD) 87 #define DELAY_ABORT_SEQ 62 /* @200kHz 9 clocks = 44us, 62us is ok */ 88 #define DELAY_HALF_PERIOD (500 / (CONFIG_SYS_I2C_SPEED / 1000)) 89 90 #if defined(CONFIG_KM_82XX) 91 #define SDA_MASK 0x00010000 92 #define SCL_MASK 0x00020000 93 void set_pin(int state, unsigned long mask) 94 { 95 ioport_t *iop = ioport_addr((immap_t *)CONFIG_SYS_IMMR, 3); 96 97 if (state) 98 setbits_be32(&iop->pdat, mask); 99 else 100 clrbits_be32(&iop->pdat, mask); 101 102 setbits_be32(&iop->pdir, mask); 103 } 104 105 static int get_pin(unsigned long mask) 106 { 107 ioport_t *iop = ioport_addr((immap_t *)CONFIG_SYS_IMMR, 3); 108 109 clrbits_be32(&iop->pdir, mask); 110 return 0 != (in_be32(&iop->pdat) & mask); 111 } 112 113 static void set_sda(int state) 114 { 115 set_pin(state, SDA_MASK); 116 } 117 118 static void set_scl(int state) 119 { 120 set_pin(state, SCL_MASK); 121 } 122 123 static int get_sda(void) 124 { 125 return get_pin(SDA_MASK); 126 } 127 128 static int get_scl(void) 129 { 130 return get_pin(SCL_MASK); 131 } 132 133 #if defined(CONFIG_HARD_I2C) 134 static void setports(int gpio) 135 { 136 ioport_t *iop = ioport_addr((immap_t *)CONFIG_SYS_IMMR, 3); 137 138 if (gpio) { 139 clrbits_be32(&iop->ppar, (SDA_MASK | SCL_MASK)); 140 clrbits_be32(&iop->podr, (SDA_MASK | SCL_MASK)); 141 } else { 142 setbits_be32(&iop->ppar, (SDA_MASK | SCL_MASK)); 143 clrbits_be32(&iop->pdir, (SDA_MASK | SCL_MASK)); 144 setbits_be32(&iop->podr, (SDA_MASK | SCL_MASK)); 145 } 146 } 147 #endif 148 #endif 149 150 #if !defined(CONFIG_MPC83xx) 151 static void i2c_write_start_seq(void) 152 { 153 set_sda(1); 154 udelay(DELAY_HALF_PERIOD); 155 set_scl(1); 156 udelay(DELAY_HALF_PERIOD); 157 set_sda(0); 158 udelay(DELAY_HALF_PERIOD); 159 set_scl(0); 160 udelay(DELAY_HALF_PERIOD); 161 } 162 163 /* 164 * I2C is a synchronous protocol and resets of the processor in the middle 165 * of an access can block the I2C Bus until a powerdown of the full unit is 166 * done. This function toggles the SCL until the SCL and SCA line are 167 * released, but max. 16 times, after this a I2C start-sequence is sent. 168 * This I2C Deblocking mechanism was developed by Keymile in association 169 * with Anatech and Atmel in 1998. 170 */ 171 int i2c_make_abort(void) 172 { 173 174 #if defined(CONFIG_HARD_I2C) && !defined(MACH_TYPE_KM_KIRKWOOD) 175 immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ; 176 i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c; 177 178 /* 179 * disable I2C controller first, otherwhise it thinks we want to 180 * talk to the slave port... 181 */ 182 clrbits_8(&i2c->i2c_i2mod, 0x01); 183 184 /* Set the PortPins to GPIO */ 185 setports(1); 186 #endif 187 188 int scl_state = 0; 189 int sda_state = 0; 190 int i = 0; 191 int ret = 0; 192 193 if (!get_sda()) { 194 ret = -1; 195 while (i < 16) { 196 i++; 197 set_scl(0); 198 udelay(DELAY_ABORT_SEQ); 199 set_scl(1); 200 udelay(DELAY_ABORT_SEQ); 201 scl_state = get_scl(); 202 sda_state = get_sda(); 203 if (scl_state && sda_state) { 204 ret = 0; 205 break; 206 } 207 } 208 } 209 if (ret == 0) 210 for (i = 0; i < 5; i++) 211 i2c_write_start_seq(); 212 213 /* respect stop setup time */ 214 udelay(DELAY_ABORT_SEQ); 215 set_scl(1); 216 udelay(DELAY_ABORT_SEQ); 217 set_sda(1); 218 get_sda(); 219 220 #if defined(CONFIG_HARD_I2C) 221 /* Set the PortPins back to use for I2C */ 222 setports(0); 223 #endif 224 return ret; 225 } 226 #endif 227 228 #if defined(CONFIG_MPC83xx) 229 static void i2c_write_start_seq(void) 230 { 231 struct fsl_i2c *dev; 232 dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET); 233 udelay(DELAY_ABORT_SEQ); 234 out_8(&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA)); 235 udelay(DELAY_ABORT_SEQ); 236 out_8(&dev->cr, (I2C_CR_MEN)); 237 } 238 239 int i2c_make_abort(void) 240 { 241 struct fsl_i2c *dev; 242 dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET); 243 uchar dummy; 244 uchar last; 245 int nbr_read = 0; 246 int i = 0; 247 int ret = 0; 248 249 /* wait after each operation to finsh with a delay */ 250 out_8(&dev->cr, (I2C_CR_MSTA)); 251 udelay(DELAY_ABORT_SEQ); 252 out_8(&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA)); 253 udelay(DELAY_ABORT_SEQ); 254 dummy = in_8(&dev->dr); 255 udelay(DELAY_ABORT_SEQ); 256 last = in_8(&dev->dr); 257 nbr_read++; 258 259 /* 260 * do read until the last bit is 1, but stop if the full eeprom is 261 * read. 262 */ 263 while (((last & 0x01) != 0x01) && 264 (nbr_read < CONFIG_SYS_IVM_EEPROM_MAX_LEN)) { 265 udelay(DELAY_ABORT_SEQ); 266 last = in_8(&dev->dr); 267 nbr_read++; 268 } 269 if ((last & 0x01) != 0x01) 270 ret = -2; 271 if ((last != 0xff) || (nbr_read > 1)) 272 printf("[INFO] i2c abort after %d bytes (0x%02x)\n", 273 nbr_read, last); 274 udelay(DELAY_ABORT_SEQ); 275 out_8(&dev->cr, (I2C_CR_MEN)); 276 udelay(DELAY_ABORT_SEQ); 277 /* clear status reg */ 278 out_8(&dev->sr, 0); 279 280 for (i = 0; i < 5; i++) 281 i2c_write_start_seq(); 282 if (ret != 0) 283 printf("[ERROR] i2c abort failed after %d bytes (0x%02x)\n", 284 nbr_read, last); 285 286 return ret; 287 } 288 #endif 289 290 /** 291 * i2c_init_board - reset i2c bus. When the board is powercycled during a 292 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions. 293 */ 294 void i2c_init_board(void) 295 { 296 /* Now run the AbortSequence() */ 297 i2c_make_abort(); 298 } 299 #endif 300 #endif 301 302 #if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT) 303 int fdt_set_node_and_value(void *blob, 304 char *nodename, 305 char *regname, 306 void *var, 307 int size) 308 { 309 int ret = 0; 310 int nodeoffset = 0; 311 312 nodeoffset = fdt_path_offset(blob, nodename); 313 if (nodeoffset >= 0) { 314 ret = fdt_setprop(blob, nodeoffset, regname, var, 315 size); 316 if (ret < 0) 317 printf("ft_blob_update(): cannot set %s/%s " 318 "property err:%s\n", nodename, regname, 319 fdt_strerror(ret)); 320 } else { 321 printf("ft_blob_update(): cannot find %s node " 322 "err:%s\n", nodename, fdt_strerror(nodeoffset)); 323 } 324 return ret; 325 } 326 327 int fdt_get_node_and_value(void *blob, 328 char *nodename, 329 char *propname, 330 void **var) 331 { 332 int len; 333 int nodeoffset = 0; 334 335 nodeoffset = fdt_path_offset(blob, nodename); 336 if (nodeoffset >= 0) { 337 *var = (void *)fdt_getprop(blob, nodeoffset, propname, &len); 338 if (len == 0) { 339 /* no value */ 340 printf("%s no value\n", __func__); 341 return -1; 342 } else if (len > 0) { 343 return len; 344 } else { 345 printf("libfdt fdt_getprop(): %s\n", 346 fdt_strerror(len)); 347 return -2; 348 } 349 } else { 350 printf("%s: cannot find %s node err:%s\n", __func__, 351 nodename, fdt_strerror(nodeoffset)); 352 return -3; 353 } 354 } 355 #endif 356 357 #if !defined(MACH_TYPE_KM_KIRKWOOD) 358 int ethernet_present(void) 359 { 360 struct km_bec_fpga *base = 361 (struct km_bec_fpga *)CONFIG_SYS_KMBEC_FPGA_BASE; 362 363 return in_8(&base->bprth) & PIGGY_PRESENT; 364 } 365 #endif 366 367 int board_eth_init(bd_t *bis) 368 { 369 if (ethernet_present()) 370 return cpu_eth_init(bis); 371 372 return -1; 373 } 374 375 /* 376 * do_setboardid command 377 * read out the board id and the hw key from the intventory EEPROM and set 378 * this values as environment variables. 379 */ 380 static int do_setboardid(cmd_tbl_t *cmdtp, int flag, int argc, 381 char *const argv[]) 382 { 383 unsigned char buf[32]; 384 char *p; 385 386 p = get_local_var("IVM_BoardId"); 387 if (p == NULL) { 388 printf("can't get the IVM_Boardid\n"); 389 return 1; 390 } 391 sprintf((char *)buf, "%s", p); 392 setenv("boardid", (char *)buf); 393 394 p = get_local_var("IVM_HWKey"); 395 if (p == NULL) { 396 printf("can't get the IVM_HWKey\n"); 397 return 1; 398 } 399 sprintf((char *)buf, "%s", p); 400 setenv("hwkey", (char *)buf); 401 402 return 0; 403 } 404 405 U_BOOT_CMD(km_setboardid, 1, 0, do_setboardid, "setboardid", "read out bid and " 406 "hwkey from IVM and set in environment"); 407 408 /* 409 * command km_checkbidhwk 410 * if "boardid" and "hwkey" are not already set in the environment, do: 411 * if a "boardIdListHex" exists in the environment: 412 * - read ivm data for boardid and hwkey 413 * - compare each entry of the boardIdListHex with the 414 * IVM data: 415 * if match: 416 * set environment variables boardid, boardId, 417 * hwkey, hwKey to the found values 418 * both (boardid and boardId) are set because 419 * they might be used differently in the 420 * application and in the init scripts (?) 421 * return 0 in case of match, 1 if not match or error 422 */ 423 int do_checkboardidhwk(cmd_tbl_t *cmdtp, int flag, int argc, 424 char *const argv[]) 425 { 426 unsigned long ivmbid = 0, ivmhwkey = 0; 427 unsigned long envbid = 0, envhwkey = 0; 428 char *p; 429 int verbose = argc > 1 && *argv[1] == 'v'; 430 int rc = 0; 431 432 /* 433 * first read out the real inventory values, these values are 434 * already stored in the local hush variables 435 */ 436 p = get_local_var("IVM_BoardId"); 437 if (p == NULL) { 438 printf("can't get the IVM_Boardid\n"); 439 return 1; 440 } 441 rc = strict_strtoul(p, 16, &ivmbid); 442 443 p = get_local_var("IVM_HWKey"); 444 if (p == NULL) { 445 printf("can't get the IVM_HWKey\n"); 446 return 1; 447 } 448 rc = strict_strtoul(p, 16, &ivmhwkey); 449 450 if (!ivmbid || !ivmhwkey) { 451 printf("Error: IVM_BoardId and/or IVM_HWKey not set!\n"); 452 return rc; 453 } 454 455 /* now try to read values from environment if available */ 456 p = getenv("boardid"); 457 if (p != NULL) 458 rc = strict_strtoul(p, 16, &envbid); 459 p = getenv("hwkey"); 460 if (p != NULL) 461 rc = strict_strtoul(p, 16, &envhwkey); 462 463 if (rc != 0) { 464 printf("strict_strtoul returns error: %d", rc); 465 return rc; 466 } 467 468 if (!envbid || !envhwkey) { 469 /* 470 * BoardId/HWkey not available in the environment, so try the 471 * environment variable for BoardId/HWkey list 472 */ 473 char *bidhwklist = getenv("boardIdListHex"); 474 475 if (bidhwklist) { 476 int found = 0; 477 char *rest = bidhwklist; 478 char *endp; 479 480 if (verbose) { 481 printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n", 482 ivmbid, ivmhwkey); 483 printf("boardIdHwKeyList: %s\n", 484 bidhwklist); 485 } 486 while (!found) { 487 /* loop over each bid/hwkey pair in the list */ 488 unsigned long bid = 0; 489 unsigned long hwkey = 0; 490 491 while (*rest && !isxdigit(*rest)) 492 rest++; 493 /* 494 * use simple_strtoul because we need &end and 495 * we know we got non numeric char at the end 496 */ 497 bid = simple_strtoul(rest, &endp, 16); 498 /* BoardId and HWkey are separated with a "_" */ 499 if (*endp == '_') { 500 rest = endp + 1; 501 /* 502 * use simple_strtoul because we need 503 * &end 504 */ 505 hwkey = simple_strtoul(rest, &endp, 16); 506 rest = endp; 507 while (*rest && !isxdigit(*rest)) 508 rest++; 509 } 510 if ((!bid) || (!hwkey)) { 511 /* end of list */ 512 break; 513 } 514 if (verbose) { 515 printf("trying bid=0x%lX, hwkey=%ld\n", 516 bid, hwkey); 517 } 518 /* 519 * Compare the values of the found entry in the 520 * list with the valid values which are stored 521 * in the inventory eeprom. If they are equal 522 * set the values in environment variables. 523 */ 524 if ((bid == ivmbid) && (hwkey == ivmhwkey)) { 525 char buf[10]; 526 527 found = 1; 528 envbid = bid; 529 envhwkey = hwkey; 530 sprintf(buf, "%lx", bid); 531 setenv("boardid", buf); 532 sprintf(buf, "%lx", hwkey); 533 setenv("hwkey", buf); 534 } 535 } /* end while( ! found ) */ 536 } 537 } 538 539 /* compare now the values */ 540 if ((ivmbid == envbid) && (ivmhwkey == envhwkey)) { 541 printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey); 542 rc = 0; /* match */ 543 } else { 544 printf("Error: env bId=0x%3lX, hwKey=%ld\n", envbid, envhwkey); 545 printf(" IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey); 546 rc = 1; /* don't match */ 547 } 548 return rc; 549 } 550 551 U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk, 552 "check boardid and hwkey", 553 "[v]\n - check environment parameter "\ 554 "\"boardIdListHex\" against stored boardid and hwkey "\ 555 "from the IVM\n v: verbose output" 556 ); 557