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 #include <ioports.h> 29 #include <command.h> 30 #include <malloc.h> 31 #include <hush.h> 32 #include <net.h> 33 #include <netdev.h> 34 #include <asm/io.h> 35 #include <linux/ctype.h> 36 37 #if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT) 38 #include <libfdt.h> 39 #endif 40 41 #include "common.h" 42 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C) 43 #include <i2c.h> 44 #endif 45 46 static void i2c_write_start_seq(void); 47 DECLARE_GLOBAL_DATA_PTR; 48 49 /* 50 * Set Keymile specific environment variables 51 * Currently only some memory layout variables are calculated here 52 * ... ------------------------------------------------ 53 * ... |@rootfsaddr |@pnvramaddr |@varaddr |@reserved |@END_OF_RAM 54 * ... |<------------------- pram ------------------->| 55 * ... ------------------------------------------------ 56 * @END_OF_RAM: denotes the RAM size 57 * @pnvramaddr: Startadress of pseudo non volatile RAM in hex 58 * @pram : preserved ram size in k 59 * @varaddr : startadress for /var mounted into RAM 60 */ 61 int set_km_env(void) 62 { 63 uchar buf[32]; 64 unsigned int pnvramaddr; 65 unsigned int pram; 66 unsigned int varaddr; 67 unsigned int kernelmem; 68 char *p; 69 unsigned long rootfssize = 0; 70 71 pnvramaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM 72 - CONFIG_KM_PNVRAM; 73 sprintf((char *)buf, "0x%x", pnvramaddr); 74 setenv("pnvramaddr", (char *)buf); 75 76 /* try to read rootfssize (ram image) from envrionment */ 77 p = getenv("rootfssize"); 78 if (p != NULL) 79 strict_strtoul(p, 16, &rootfssize); 80 pram = (rootfssize + CONFIG_KM_RESERVED_PRAM + CONFIG_KM_PHRAM + 81 CONFIG_KM_PNVRAM) / 0x400; 82 sprintf((char *)buf, "0x%x", pram); 83 setenv("pram", (char *)buf); 84 85 varaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM; 86 sprintf((char *)buf, "0x%x", varaddr); 87 setenv("varaddr", (char *)buf); 88 89 kernelmem = gd->ram_size - 0x400 * pram; 90 sprintf((char *)buf, "0x%x", kernelmem); 91 setenv("kernelmem", (char *)buf); 92 93 return 0; 94 } 95 96 #define DELAY_ABORT_SEQ 62 /* @200kHz 9 clocks = 44us, 62us is ok */ 97 #define DELAY_HALF_PERIOD (500 / (CONFIG_SYS_I2C_SPEED / 1000)) 98 99 #if !defined(CONFIG_MPC83xx) 100 static void i2c_write_start_seq(void) 101 { 102 set_sda(1); 103 udelay(DELAY_HALF_PERIOD); 104 set_scl(1); 105 udelay(DELAY_HALF_PERIOD); 106 set_sda(0); 107 udelay(DELAY_HALF_PERIOD); 108 set_scl(0); 109 udelay(DELAY_HALF_PERIOD); 110 } 111 112 /* 113 * I2C is a synchronous protocol and resets of the processor in the middle 114 * of an access can block the I2C Bus until a powerdown of the full unit is 115 * done. This function toggles the SCL until the SCL and SCA line are 116 * released, but max. 16 times, after this a I2C start-sequence is sent. 117 * This I2C Deblocking mechanism was developed by Keymile in association 118 * with Anatech and Atmel in 1998. 119 */ 120 int i2c_make_abort(void) 121 { 122 123 #if defined(CONFIG_HARD_I2C) && !defined(MACH_TYPE_KM_KIRKWOOD) 124 immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ; 125 i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c; 126 127 /* 128 * disable I2C controller first, otherwhise it thinks we want to 129 * talk to the slave port... 130 */ 131 clrbits_8(&i2c->i2c_i2mod, 0x01); 132 133 /* Set the PortPins to GPIO */ 134 setports(1); 135 #endif 136 137 int scl_state = 0; 138 int sda_state = 0; 139 int i = 0; 140 int ret = 0; 141 142 if (!get_sda()) { 143 ret = -1; 144 while (i < 16) { 145 i++; 146 set_scl(0); 147 udelay(DELAY_ABORT_SEQ); 148 set_scl(1); 149 udelay(DELAY_ABORT_SEQ); 150 scl_state = get_scl(); 151 sda_state = get_sda(); 152 if (scl_state && sda_state) { 153 ret = 0; 154 printf("[INFO] i2c abort after %d clocks\n", i); 155 break; 156 } 157 } 158 } 159 if (ret == 0) 160 for (i = 0; i < 5; i++) 161 i2c_write_start_seq(); 162 else 163 printf("[ERROR] i2c abort failed\n"); 164 165 /* respect stop setup time */ 166 udelay(DELAY_ABORT_SEQ); 167 set_scl(1); 168 udelay(DELAY_ABORT_SEQ); 169 set_sda(1); 170 get_sda(); 171 172 #if defined(CONFIG_HARD_I2C) 173 /* Set the PortPins back to use for I2C */ 174 setports(0); 175 #endif 176 return ret; 177 } 178 #endif /* !MPC83xx */ 179 180 #if defined(CONFIG_MPC83xx) 181 static void i2c_write_start_seq(void) 182 { 183 struct fsl_i2c *dev; 184 dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET); 185 udelay(DELAY_ABORT_SEQ); 186 out_8(&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA)); 187 udelay(DELAY_ABORT_SEQ); 188 out_8(&dev->cr, (I2C_CR_MEN)); 189 } 190 191 int i2c_make_abort(void) 192 { 193 struct fsl_i2c *dev; 194 dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET); 195 uchar dummy; 196 uchar last; 197 int nbr_read = 0; 198 int i = 0; 199 int ret = 0; 200 201 /* wait after each operation to finsh with a delay */ 202 out_8(&dev->cr, (I2C_CR_MSTA)); 203 udelay(DELAY_ABORT_SEQ); 204 out_8(&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA)); 205 udelay(DELAY_ABORT_SEQ); 206 dummy = in_8(&dev->dr); 207 udelay(DELAY_ABORT_SEQ); 208 last = in_8(&dev->dr); 209 nbr_read++; 210 211 /* 212 * do read until the last bit is 1, but stop if the full eeprom is 213 * read. 214 */ 215 while (((last & 0x01) != 0x01) && 216 (nbr_read < CONFIG_SYS_IVM_EEPROM_MAX_LEN)) { 217 udelay(DELAY_ABORT_SEQ); 218 last = in_8(&dev->dr); 219 nbr_read++; 220 } 221 if ((last & 0x01) != 0x01) 222 ret = -2; 223 if ((last != 0xff) || (nbr_read > 1)) 224 printf("[INFO] i2c abort after %d bytes (0x%02x)\n", 225 nbr_read, last); 226 udelay(DELAY_ABORT_SEQ); 227 out_8(&dev->cr, (I2C_CR_MEN)); 228 udelay(DELAY_ABORT_SEQ); 229 /* clear status reg */ 230 out_8(&dev->sr, 0); 231 232 for (i = 0; i < 5; i++) 233 i2c_write_start_seq(); 234 if (ret != 0) 235 printf("[ERROR] i2c abort failed after %d bytes (0x%02x)\n", 236 nbr_read, last); 237 238 return ret; 239 } 240 #endif 241 242 /** 243 * i2c_init_board - reset i2c bus. When the board is powercycled during a 244 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions. 245 */ 246 void i2c_init_board(void) 247 { 248 /* Now run the AbortSequence() */ 249 i2c_make_abort(); 250 } 251 252 #if !defined(MACH_TYPE_KM_KIRKWOOD) 253 int ethernet_present(void) 254 { 255 struct km_bec_fpga *base = 256 (struct km_bec_fpga *)CONFIG_SYS_KMBEC_FPGA_BASE; 257 258 return in_8(&base->bprth) & PIGGY_PRESENT; 259 } 260 #endif 261 262 int board_eth_init(bd_t *bis) 263 { 264 if (ethernet_present()) 265 return cpu_eth_init(bis); 266 267 return -1; 268 } 269 270 /* 271 * do_setboardid command 272 * read out the board id and the hw key from the intventory EEPROM and set 273 * this values as environment variables. 274 */ 275 static int do_setboardid(cmd_tbl_t *cmdtp, int flag, int argc, 276 char *const argv[]) 277 { 278 unsigned char buf[32]; 279 char *p; 280 281 p = get_local_var("IVM_BoardId"); 282 if (p == NULL) { 283 printf("can't get the IVM_Boardid\n"); 284 return 1; 285 } 286 sprintf((char *)buf, "%s", p); 287 setenv("boardid", (char *)buf); 288 printf("set boardid=%s\n", buf); 289 290 p = get_local_var("IVM_HWKey"); 291 if (p == NULL) { 292 printf("can't get the IVM_HWKey\n"); 293 return 1; 294 } 295 sprintf((char *)buf, "%s", p); 296 setenv("hwkey", (char *)buf); 297 printf("set hwkey=%s\n", buf); 298 printf("Execute manually saveenv for persistent storage.\n"); 299 300 return 0; 301 } 302 303 U_BOOT_CMD(km_setboardid, 1, 0, do_setboardid, "setboardid", "read out bid and " 304 "hwkey from IVM and set in environment"); 305 306 /* 307 * command km_checkbidhwk 308 * if "boardid" and "hwkey" are not already set in the environment, do: 309 * if a "boardIdListHex" exists in the environment: 310 * - read ivm data for boardid and hwkey 311 * - compare each entry of the boardIdListHex with the 312 * IVM data: 313 * if match: 314 * set environment variables boardid, boardId, 315 * hwkey, hwKey to the found values 316 * both (boardid and boardId) are set because 317 * they might be used differently in the 318 * application and in the init scripts (?) 319 * return 0 in case of match, 1 if not match or error 320 */ 321 int do_checkboardidhwk(cmd_tbl_t *cmdtp, int flag, int argc, 322 char *const argv[]) 323 { 324 unsigned long ivmbid = 0, ivmhwkey = 0; 325 unsigned long envbid = 0, envhwkey = 0; 326 char *p; 327 int verbose = argc > 1 && *argv[1] == 'v'; 328 int rc = 0; 329 330 /* 331 * first read out the real inventory values, these values are 332 * already stored in the local hush variables 333 */ 334 p = get_local_var("IVM_BoardId"); 335 if (p == NULL) { 336 printf("can't get the IVM_Boardid\n"); 337 return 1; 338 } 339 rc = strict_strtoul(p, 16, &ivmbid); 340 341 p = get_local_var("IVM_HWKey"); 342 if (p == NULL) { 343 printf("can't get the IVM_HWKey\n"); 344 return 1; 345 } 346 rc = strict_strtoul(p, 16, &ivmhwkey); 347 348 if (!ivmbid || !ivmhwkey) { 349 printf("Error: IVM_BoardId and/or IVM_HWKey not set!\n"); 350 return rc; 351 } 352 353 /* now try to read values from environment if available */ 354 p = getenv("boardid"); 355 if (p != NULL) 356 rc = strict_strtoul(p, 16, &envbid); 357 p = getenv("hwkey"); 358 if (p != NULL) 359 rc = strict_strtoul(p, 16, &envhwkey); 360 361 if (rc != 0) { 362 printf("strict_strtoul returns error: %d", rc); 363 return rc; 364 } 365 366 if (!envbid || !envhwkey) { 367 /* 368 * BoardId/HWkey not available in the environment, so try the 369 * environment variable for BoardId/HWkey list 370 */ 371 char *bidhwklist = getenv("boardIdListHex"); 372 373 if (bidhwklist) { 374 int found = 0; 375 char *rest = bidhwklist; 376 char *endp; 377 378 if (verbose) { 379 printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n", 380 ivmbid, ivmhwkey); 381 printf("boardIdHwKeyList: %s\n", 382 bidhwklist); 383 } 384 while (!found) { 385 /* loop over each bid/hwkey pair in the list */ 386 unsigned long bid = 0; 387 unsigned long hwkey = 0; 388 389 while (*rest && !isxdigit(*rest)) 390 rest++; 391 /* 392 * use simple_strtoul because we need &end and 393 * we know we got non numeric char at the end 394 */ 395 bid = simple_strtoul(rest, &endp, 16); 396 /* BoardId and HWkey are separated with a "_" */ 397 if (*endp == '_') { 398 rest = endp + 1; 399 /* 400 * use simple_strtoul because we need 401 * &end 402 */ 403 hwkey = simple_strtoul(rest, &endp, 16); 404 rest = endp; 405 while (*rest && !isxdigit(*rest)) 406 rest++; 407 } 408 if ((!bid) || (!hwkey)) { 409 /* end of list */ 410 break; 411 } 412 if (verbose) { 413 printf("trying bid=0x%lX, hwkey=%ld\n", 414 bid, hwkey); 415 } 416 /* 417 * Compare the values of the found entry in the 418 * list with the valid values which are stored 419 * in the inventory eeprom. If they are equal 420 * set the values in environment variables. 421 */ 422 if ((bid == ivmbid) && (hwkey == ivmhwkey)) { 423 char buf[10]; 424 425 found = 1; 426 envbid = bid; 427 envhwkey = hwkey; 428 sprintf(buf, "%lx", bid); 429 setenv("boardid", buf); 430 sprintf(buf, "%lx", hwkey); 431 setenv("hwkey", buf); 432 } 433 } /* end while( ! found ) */ 434 } 435 } 436 437 /* compare now the values */ 438 if ((ivmbid == envbid) && (ivmhwkey == envhwkey)) { 439 printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey); 440 rc = 0; /* match */ 441 } else { 442 printf("Error: env boardid=0x%3lX, hwkey=%ld\n", envbid, 443 envhwkey); 444 printf(" IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey); 445 rc = 1; /* don't match */ 446 } 447 return rc; 448 } 449 450 U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk, 451 "check boardid and hwkey", 452 "[v]\n - check environment parameter "\ 453 "\"boardIdListHex\" against stored boardid and hwkey "\ 454 "from the IVM\n v: verbose output" 455 ); 456