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