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