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_POST) 38 #include "post.h" 39 #endif 40 #include "common.h" 41 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C) 42 #include <i2c.h> 43 #endif 44 45 #if !defined(CONFIG_MPC83xx) 46 static void i2c_write_start_seq(void); 47 #endif 48 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 unsigned int kernelmem; 70 char *p; 71 unsigned long rootfssize = 0; 72 73 pnvramaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM 74 - CONFIG_KM_PNVRAM; 75 sprintf((char *)buf, "0x%x", pnvramaddr); 76 setenv("pnvramaddr", (char *)buf); 77 78 /* try to read rootfssize (ram image) from envrionment */ 79 p = getenv("rootfssize"); 80 if (p != NULL) 81 strict_strtoul(p, 16, &rootfssize); 82 pram = (rootfssize + CONFIG_KM_RESERVED_PRAM + CONFIG_KM_PHRAM + 83 CONFIG_KM_PNVRAM) / 0x400; 84 sprintf((char *)buf, "0x%x", pram); 85 setenv("pram", (char *)buf); 86 87 varaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM; 88 sprintf((char *)buf, "0x%x", varaddr); 89 setenv("varaddr", (char *)buf); 90 91 kernelmem = gd->ram_size - 0x400 * pram; 92 sprintf((char *)buf, "0x%x", kernelmem); 93 setenv("kernelmem", (char *)buf); 94 95 return 0; 96 } 97 98 #if defined(CONFIG_SYS_I2C_INIT_BOARD) 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 179 180 /** 181 * i2c_init_board - reset i2c bus. When the board is powercycled during a 182 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions. 183 */ 184 void i2c_init_board(void) 185 { 186 /* Now run the AbortSequence() */ 187 i2c_make_abort(); 188 } 189 #endif 190 191 192 #if !defined(MACH_TYPE_KM_KIRKWOOD) 193 int ethernet_present(void) 194 { 195 struct km_bec_fpga *base = 196 (struct km_bec_fpga *)CONFIG_SYS_KMBEC_FPGA_BASE; 197 198 return in_8(&base->bprth) & PIGGY_PRESENT; 199 } 200 #endif 201 202 int board_eth_init(bd_t *bis) 203 { 204 if (ethernet_present()) 205 return cpu_eth_init(bis); 206 207 return -1; 208 } 209 210 /* 211 * do_setboardid command 212 * read out the board id and the hw key from the intventory EEPROM and set 213 * this values as environment variables. 214 */ 215 static int do_setboardid(cmd_tbl_t *cmdtp, int flag, int argc, 216 char *const argv[]) 217 { 218 unsigned char buf[32]; 219 char *p; 220 221 p = get_local_var("IVM_BoardId"); 222 if (p == NULL) { 223 printf("can't get the IVM_Boardid\n"); 224 return 1; 225 } 226 sprintf((char *)buf, "%s", p); 227 setenv("boardid", (char *)buf); 228 printf("set boardid=%s\n", buf); 229 230 p = get_local_var("IVM_HWKey"); 231 if (p == NULL) { 232 printf("can't get the IVM_HWKey\n"); 233 return 1; 234 } 235 sprintf((char *)buf, "%s", p); 236 setenv("hwkey", (char *)buf); 237 printf("set hwkey=%s\n", buf); 238 printf("Execute manually saveenv for persistent storage.\n"); 239 240 return 0; 241 } 242 243 U_BOOT_CMD(km_setboardid, 1, 0, do_setboardid, "setboardid", "read out bid and " 244 "hwkey from IVM and set in environment"); 245 246 /* 247 * command km_checkbidhwk 248 * if "boardid" and "hwkey" are not already set in the environment, do: 249 * if a "boardIdListHex" exists in the environment: 250 * - read ivm data for boardid and hwkey 251 * - compare each entry of the boardIdListHex with the 252 * IVM data: 253 * if match: 254 * set environment variables boardid, boardId, 255 * hwkey, hwKey to the found values 256 * both (boardid and boardId) are set because 257 * they might be used differently in the 258 * application and in the init scripts (?) 259 * return 0 in case of match, 1 if not match or error 260 */ 261 int do_checkboardidhwk(cmd_tbl_t *cmdtp, int flag, int argc, 262 char *const argv[]) 263 { 264 unsigned long ivmbid = 0, ivmhwkey = 0; 265 unsigned long envbid = 0, envhwkey = 0; 266 char *p; 267 int verbose = argc > 1 && *argv[1] == 'v'; 268 int rc = 0; 269 270 /* 271 * first read out the real inventory values, these values are 272 * already stored in the local hush variables 273 */ 274 p = get_local_var("IVM_BoardId"); 275 if (p == NULL) { 276 printf("can't get the IVM_Boardid\n"); 277 return 1; 278 } 279 rc = strict_strtoul(p, 16, &ivmbid); 280 281 p = get_local_var("IVM_HWKey"); 282 if (p == NULL) { 283 printf("can't get the IVM_HWKey\n"); 284 return 1; 285 } 286 rc = strict_strtoul(p, 16, &ivmhwkey); 287 288 if (!ivmbid || !ivmhwkey) { 289 printf("Error: IVM_BoardId and/or IVM_HWKey not set!\n"); 290 return rc; 291 } 292 293 /* now try to read values from environment if available */ 294 p = getenv("boardid"); 295 if (p != NULL) 296 rc = strict_strtoul(p, 16, &envbid); 297 p = getenv("hwkey"); 298 if (p != NULL) 299 rc = strict_strtoul(p, 16, &envhwkey); 300 301 if (rc != 0) { 302 printf("strict_strtoul returns error: %d", rc); 303 return rc; 304 } 305 306 if (!envbid || !envhwkey) { 307 /* 308 * BoardId/HWkey not available in the environment, so try the 309 * environment variable for BoardId/HWkey list 310 */ 311 char *bidhwklist = getenv("boardIdListHex"); 312 313 if (bidhwklist) { 314 int found = 0; 315 char *rest = bidhwklist; 316 char *endp; 317 318 if (verbose) { 319 printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n", 320 ivmbid, ivmhwkey); 321 printf("boardIdHwKeyList: %s\n", 322 bidhwklist); 323 } 324 while (!found) { 325 /* loop over each bid/hwkey pair in the list */ 326 unsigned long bid = 0; 327 unsigned long hwkey = 0; 328 329 while (*rest && !isxdigit(*rest)) 330 rest++; 331 /* 332 * use simple_strtoul because we need &end and 333 * we know we got non numeric char at the end 334 */ 335 bid = simple_strtoul(rest, &endp, 16); 336 /* BoardId and HWkey are separated with a "_" */ 337 if (*endp == '_') { 338 rest = endp + 1; 339 /* 340 * use simple_strtoul because we need 341 * &end 342 */ 343 hwkey = simple_strtoul(rest, &endp, 16); 344 rest = endp; 345 while (*rest && !isxdigit(*rest)) 346 rest++; 347 } 348 if ((!bid) || (!hwkey)) { 349 /* end of list */ 350 break; 351 } 352 if (verbose) { 353 printf("trying bid=0x%lX, hwkey=%ld\n", 354 bid, hwkey); 355 } 356 /* 357 * Compare the values of the found entry in the 358 * list with the valid values which are stored 359 * in the inventory eeprom. If they are equal 360 * set the values in environment variables. 361 */ 362 if ((bid == ivmbid) && (hwkey == ivmhwkey)) { 363 char buf[10]; 364 365 found = 1; 366 envbid = bid; 367 envhwkey = hwkey; 368 sprintf(buf, "%lx", bid); 369 setenv("boardid", buf); 370 sprintf(buf, "%lx", hwkey); 371 setenv("hwkey", buf); 372 } 373 } /* end while( ! found ) */ 374 } 375 } 376 377 /* compare now the values */ 378 if ((ivmbid == envbid) && (ivmhwkey == envhwkey)) { 379 printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey); 380 rc = 0; /* match */ 381 } else { 382 printf("Error: env boardid=0x%3lX, hwkey=%ld\n", envbid, 383 envhwkey); 384 printf(" IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey); 385 rc = 1; /* don't match */ 386 } 387 return rc; 388 } 389 390 U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk, 391 "check boardid and hwkey", 392 "[v]\n - check environment parameter "\ 393 "\"boardIdListHex\" against stored boardid and hwkey "\ 394 "from the IVM\n v: verbose output" 395 ); 396 397 /* 398 * command km_checktestboot 399 * if the testpin of the board is asserted, return 1 400 * * else return 0 401 */ 402 int do_checktestboot(cmd_tbl_t *cmdtp, int flag, int argc, 403 char *const argv[]) 404 { 405 int testpin = 0; 406 char *s = NULL; 407 int testboot = 0; 408 int verbose = argc > 1 && *argv[1] == 'v'; 409 410 #if defined(CONFIG_POST) 411 testpin = post_hotkeys_pressed(); 412 s = getenv("test_bank"); 413 #endif 414 /* when test_bank is not set, act as if testpin is not asserted */ 415 testboot = (testpin != 0) && (s); 416 if (verbose) { 417 printf("testpin = %d\n", testpin); 418 printf("test_bank = %s\n", s ? s : "not set"); 419 printf("boot test app : %s\n", (testboot) ? "yes" : "no"); 420 } 421 /* return 0 means: testboot, therefore we need the inversion */ 422 return !testboot; 423 } 424 425 U_BOOT_CMD(km_checktestboot, 2, 0, do_checktestboot, 426 "check if testpin is asserted", 427 "[v]\n v - verbose output" 428 ); 429