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 #include <i2c.h> 42 43 #if !defined(CONFIG_MPC83xx) 44 static void i2c_write_start_seq(void); 45 #endif 46 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 #if defined(CONFIG_SYS_I2C_INIT_BOARD) 97 #if !defined(CONFIG_MPC83xx) 98 static void i2c_write_start_seq(void) 99 { 100 set_sda(1); 101 udelay(DELAY_HALF_PERIOD); 102 set_scl(1); 103 udelay(DELAY_HALF_PERIOD); 104 set_sda(0); 105 udelay(DELAY_HALF_PERIOD); 106 set_scl(0); 107 udelay(DELAY_HALF_PERIOD); 108 } 109 110 /* 111 * I2C is a synchronous protocol and resets of the processor in the middle 112 * of an access can block the I2C Bus until a powerdown of the full unit is 113 * done. This function toggles the SCL until the SCL and SCA line are 114 * released, but max. 16 times, after this a I2C start-sequence is sent. 115 * This I2C Deblocking mechanism was developed by Keymile in association 116 * with Anatech and Atmel in 1998. 117 */ 118 int i2c_make_abort(void) 119 { 120 121 #if defined(CONFIG_HARD_I2C) && !defined(MACH_TYPE_KM_KIRKWOOD) 122 immap_t *immap = (immap_t *)CONFIG_SYS_IMMR; 123 i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c; 124 125 /* 126 * disable I2C controller first, otherwhise it thinks we want to 127 * talk to the slave port... 128 */ 129 clrbits_8(&i2c->i2c_i2mod, 0x01); 130 131 /* Set the PortPins to GPIO */ 132 setports(1); 133 #endif 134 135 int scl_state = 0; 136 int sda_state = 0; 137 int i = 0; 138 int ret = 0; 139 140 if (!get_sda()) { 141 ret = -1; 142 while (i < 16) { 143 i++; 144 set_scl(0); 145 udelay(DELAY_ABORT_SEQ); 146 set_scl(1); 147 udelay(DELAY_ABORT_SEQ); 148 scl_state = get_scl(); 149 sda_state = get_sda(); 150 if (scl_state && sda_state) { 151 ret = 0; 152 break; 153 } 154 } 155 } 156 if (ret == 0) 157 for (i = 0; i < 5; i++) 158 i2c_write_start_seq(); 159 160 /* respect stop setup time */ 161 udelay(DELAY_ABORT_SEQ); 162 set_scl(1); 163 udelay(DELAY_ABORT_SEQ); 164 set_sda(1); 165 get_sda(); 166 167 #if defined(CONFIG_HARD_I2C) 168 /* Set the PortPins back to use for I2C */ 169 setports(0); 170 #endif 171 return ret; 172 } 173 #endif 174 175 /** 176 * i2c_init_board - reset i2c bus. When the board is powercycled during a 177 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions. 178 */ 179 void i2c_init_board(void) 180 { 181 /* Now run the AbortSequence() */ 182 i2c_make_abort(); 183 } 184 #endif 185 186 187 #if !defined(MACH_TYPE_KM_KIRKWOOD) 188 int ethernet_present(void) 189 { 190 struct km_bec_fpga *base = 191 (struct km_bec_fpga *)CONFIG_SYS_KMBEC_FPGA_BASE; 192 193 return in_8(&base->bprth) & PIGGY_PRESENT; 194 } 195 #endif 196 197 int board_eth_init(bd_t *bis) 198 { 199 if (ethernet_present()) 200 return cpu_eth_init(bis); 201 202 return -1; 203 } 204 205 /* 206 * do_setboardid command 207 * read out the board id and the hw key from the intventory EEPROM and set 208 * this values as environment variables. 209 */ 210 static int do_setboardid(cmd_tbl_t *cmdtp, int flag, int argc, 211 char *const argv[]) 212 { 213 unsigned char buf[32]; 214 char *p; 215 216 p = get_local_var("IVM_BoardId"); 217 if (p == NULL) { 218 printf("can't get the IVM_Boardid\n"); 219 return 1; 220 } 221 sprintf((char *)buf, "%s", p); 222 setenv("boardid", (char *)buf); 223 printf("set boardid=%s\n", buf); 224 225 p = get_local_var("IVM_HWKey"); 226 if (p == NULL) { 227 printf("can't get the IVM_HWKey\n"); 228 return 1; 229 } 230 sprintf((char *)buf, "%s", p); 231 setenv("hwkey", (char *)buf); 232 printf("set hwkey=%s\n", buf); 233 printf("Execute manually saveenv for persistent storage.\n"); 234 235 return 0; 236 } 237 238 U_BOOT_CMD(km_setboardid, 1, 0, do_setboardid, "setboardid", "read out bid and " 239 "hwkey from IVM and set in environment"); 240 241 /* 242 * command km_checkbidhwk 243 * if "boardid" and "hwkey" are not already set in the environment, do: 244 * if a "boardIdListHex" exists in the environment: 245 * - read ivm data for boardid and hwkey 246 * - compare each entry of the boardIdListHex with the 247 * IVM data: 248 * if match: 249 * set environment variables boardid, boardId, 250 * hwkey, hwKey to the found values 251 * both (boardid and boardId) are set because 252 * they might be used differently in the 253 * application and in the init scripts (?) 254 * return 0 in case of match, 1 if not match or error 255 */ 256 int do_checkboardidhwk(cmd_tbl_t *cmdtp, int flag, int argc, 257 char *const argv[]) 258 { 259 unsigned long ivmbid = 0, ivmhwkey = 0; 260 unsigned long envbid = 0, envhwkey = 0; 261 char *p; 262 int verbose = argc > 1 && *argv[1] == 'v'; 263 int rc = 0; 264 265 /* 266 * first read out the real inventory values, these values are 267 * already stored in the local hush variables 268 */ 269 p = get_local_var("IVM_BoardId"); 270 if (p == NULL) { 271 printf("can't get the IVM_Boardid\n"); 272 return 1; 273 } 274 rc = strict_strtoul(p, 16, &ivmbid); 275 276 p = get_local_var("IVM_HWKey"); 277 if (p == NULL) { 278 printf("can't get the IVM_HWKey\n"); 279 return 1; 280 } 281 rc = strict_strtoul(p, 16, &ivmhwkey); 282 283 if (!ivmbid || !ivmhwkey) { 284 printf("Error: IVM_BoardId and/or IVM_HWKey not set!\n"); 285 return rc; 286 } 287 288 /* now try to read values from environment if available */ 289 p = getenv("boardid"); 290 if (p != NULL) 291 rc = strict_strtoul(p, 16, &envbid); 292 p = getenv("hwkey"); 293 if (p != NULL) 294 rc = strict_strtoul(p, 16, &envhwkey); 295 296 if (rc != 0) { 297 printf("strict_strtoul returns error: %d", rc); 298 return rc; 299 } 300 301 if (!envbid || !envhwkey) { 302 /* 303 * BoardId/HWkey not available in the environment, so try the 304 * environment variable for BoardId/HWkey list 305 */ 306 char *bidhwklist = getenv("boardIdListHex"); 307 308 if (bidhwklist) { 309 int found = 0; 310 char *rest = bidhwklist; 311 char *endp; 312 313 if (verbose) { 314 printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n", 315 ivmbid, ivmhwkey); 316 printf("boardIdHwKeyList: %s\n", 317 bidhwklist); 318 } 319 while (!found) { 320 /* loop over each bid/hwkey pair in the list */ 321 unsigned long bid = 0; 322 unsigned long hwkey = 0; 323 324 while (*rest && !isxdigit(*rest)) 325 rest++; 326 /* 327 * use simple_strtoul because we need &end and 328 * we know we got non numeric char at the end 329 */ 330 bid = simple_strtoul(rest, &endp, 16); 331 /* BoardId and HWkey are separated with a "_" */ 332 if (*endp == '_') { 333 rest = endp + 1; 334 /* 335 * use simple_strtoul because we need 336 * &end 337 */ 338 hwkey = simple_strtoul(rest, &endp, 16); 339 rest = endp; 340 while (*rest && !isxdigit(*rest)) 341 rest++; 342 } 343 if ((!bid) || (!hwkey)) { 344 /* end of list */ 345 break; 346 } 347 if (verbose) { 348 printf("trying bid=0x%lX, hwkey=%ld\n", 349 bid, hwkey); 350 } 351 /* 352 * Compare the values of the found entry in the 353 * list with the valid values which are stored 354 * in the inventory eeprom. If they are equal 355 * set the values in environment variables. 356 */ 357 if ((bid == ivmbid) && (hwkey == ivmhwkey)) { 358 char buf[10]; 359 360 found = 1; 361 envbid = bid; 362 envhwkey = hwkey; 363 sprintf(buf, "%lx", bid); 364 setenv("boardid", buf); 365 sprintf(buf, "%lx", hwkey); 366 setenv("hwkey", buf); 367 } 368 } /* end while( ! found ) */ 369 } 370 } 371 372 /* compare now the values */ 373 if ((ivmbid == envbid) && (ivmhwkey == envhwkey)) { 374 printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey); 375 rc = 0; /* match */ 376 } else { 377 printf("Error: env boardid=0x%3lX, hwkey=%ld\n", envbid, 378 envhwkey); 379 printf(" IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey); 380 rc = 1; /* don't match */ 381 } 382 return rc; 383 } 384 385 U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk, 386 "check boardid and hwkey", 387 "[v]\n - check environment parameter "\ 388 "\"boardIdListHex\" against stored boardid and hwkey "\ 389 "from the IVM\n v: verbose output" 390 ); 391 392 /* 393 * command km_checktestboot 394 * if the testpin of the board is asserted, return 1 395 * * else return 0 396 */ 397 int do_checktestboot(cmd_tbl_t *cmdtp, int flag, int argc, 398 char *const argv[]) 399 { 400 int testpin = 0; 401 char *s = NULL; 402 int testboot = 0; 403 int verbose = argc > 1 && *argv[1] == 'v'; 404 405 #if defined(CONFIG_POST) 406 testpin = post_hotkeys_pressed(); 407 s = getenv("test_bank"); 408 #endif 409 /* when test_bank is not set, act as if testpin is not asserted */ 410 testboot = (testpin != 0) && (s); 411 if (verbose) { 412 printf("testpin = %d\n", testpin); 413 printf("test_bank = %s\n", s ? s : "not set"); 414 printf("boot test app : %s\n", (testboot) ? "yes" : "no"); 415 } 416 /* return 0 means: testboot, therefore we need the inversion */ 417 return !testboot; 418 } 419 420 U_BOOT_CMD(km_checktestboot, 2, 0, do_checktestboot, 421 "check if testpin is asserted", 422 "[v]\n v - verbose output" 423 ); 424