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 break; 143 } 144 } 145 } 146 if (ret == 0) 147 for (i = 0; i < 5; i++) 148 i2c_write_start_seq(); 149 150 /* respect stop setup time */ 151 udelay(DELAY_ABORT_SEQ); 152 set_scl(1); 153 udelay(DELAY_ABORT_SEQ); 154 set_sda(1); 155 get_sda(); 156 157 #if defined(CONFIG_HARD_I2C) 158 /* Set the PortPins back to use for I2C */ 159 setports(0); 160 #endif 161 return ret; 162 } 163 #endif /* !MPC83xx */ 164 165 #if defined(CONFIG_MPC83xx) 166 static void i2c_write_start_seq(void) 167 { 168 struct fsl_i2c *dev; 169 dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET); 170 udelay(DELAY_ABORT_SEQ); 171 out_8(&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA)); 172 udelay(DELAY_ABORT_SEQ); 173 out_8(&dev->cr, (I2C_CR_MEN)); 174 } 175 176 int i2c_make_abort(void) 177 { 178 struct fsl_i2c *dev; 179 dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET); 180 uchar dummy; 181 uchar last; 182 int nbr_read = 0; 183 int i = 0; 184 int ret = 0; 185 186 /* wait after each operation to finsh with a delay */ 187 out_8(&dev->cr, (I2C_CR_MSTA)); 188 udelay(DELAY_ABORT_SEQ); 189 out_8(&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA)); 190 udelay(DELAY_ABORT_SEQ); 191 dummy = in_8(&dev->dr); 192 udelay(DELAY_ABORT_SEQ); 193 last = in_8(&dev->dr); 194 nbr_read++; 195 196 /* 197 * do read until the last bit is 1, but stop if the full eeprom is 198 * read. 199 */ 200 while (((last & 0x01) != 0x01) && 201 (nbr_read < CONFIG_SYS_IVM_EEPROM_MAX_LEN)) { 202 udelay(DELAY_ABORT_SEQ); 203 last = in_8(&dev->dr); 204 nbr_read++; 205 } 206 if ((last & 0x01) != 0x01) 207 ret = -2; 208 if ((last != 0xff) || (nbr_read > 1)) 209 printf("[INFO] i2c abort after %d bytes (0x%02x)\n", 210 nbr_read, last); 211 udelay(DELAY_ABORT_SEQ); 212 out_8(&dev->cr, (I2C_CR_MEN)); 213 udelay(DELAY_ABORT_SEQ); 214 /* clear status reg */ 215 out_8(&dev->sr, 0); 216 217 for (i = 0; i < 5; i++) 218 i2c_write_start_seq(); 219 if (ret != 0) 220 printf("[ERROR] i2c abort failed after %d bytes (0x%02x)\n", 221 nbr_read, last); 222 223 return ret; 224 } 225 #endif 226 227 /** 228 * i2c_init_board - reset i2c bus. When the board is powercycled during a 229 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions. 230 */ 231 void i2c_init_board(void) 232 { 233 /* Now run the AbortSequence() */ 234 i2c_make_abort(); 235 } 236 237 #if !defined(MACH_TYPE_KM_KIRKWOOD) 238 int ethernet_present(void) 239 { 240 struct km_bec_fpga *base = 241 (struct km_bec_fpga *)CONFIG_SYS_KMBEC_FPGA_BASE; 242 243 return in_8(&base->bprth) & PIGGY_PRESENT; 244 } 245 #endif 246 247 int board_eth_init(bd_t *bis) 248 { 249 if (ethernet_present()) 250 return cpu_eth_init(bis); 251 252 return -1; 253 } 254 255 /* 256 * do_setboardid command 257 * read out the board id and the hw key from the intventory EEPROM and set 258 * this values as environment variables. 259 */ 260 static int do_setboardid(cmd_tbl_t *cmdtp, int flag, int argc, 261 char *const argv[]) 262 { 263 unsigned char buf[32]; 264 char *p; 265 266 p = get_local_var("IVM_BoardId"); 267 if (p == NULL) { 268 printf("can't get the IVM_Boardid\n"); 269 return 1; 270 } 271 sprintf((char *)buf, "%s", p); 272 setenv("boardid", (char *)buf); 273 printf("set boardid=%s\n", buf); 274 275 p = get_local_var("IVM_HWKey"); 276 if (p == NULL) { 277 printf("can't get the IVM_HWKey\n"); 278 return 1; 279 } 280 sprintf((char *)buf, "%s", p); 281 setenv("hwkey", (char *)buf); 282 printf("set hwkey=%s\n", buf); 283 printf("Execute manually saveenv for persistent storage.\n"); 284 285 return 0; 286 } 287 288 U_BOOT_CMD(km_setboardid, 1, 0, do_setboardid, "setboardid", "read out bid and " 289 "hwkey from IVM and set in environment"); 290 291 /* 292 * command km_checkbidhwk 293 * if "boardid" and "hwkey" are not already set in the environment, do: 294 * if a "boardIdListHex" exists in the environment: 295 * - read ivm data for boardid and hwkey 296 * - compare each entry of the boardIdListHex with the 297 * IVM data: 298 * if match: 299 * set environment variables boardid, boardId, 300 * hwkey, hwKey to the found values 301 * both (boardid and boardId) are set because 302 * they might be used differently in the 303 * application and in the init scripts (?) 304 * return 0 in case of match, 1 if not match or error 305 */ 306 int do_checkboardidhwk(cmd_tbl_t *cmdtp, int flag, int argc, 307 char *const argv[]) 308 { 309 unsigned long ivmbid = 0, ivmhwkey = 0; 310 unsigned long envbid = 0, envhwkey = 0; 311 char *p; 312 int verbose = argc > 1 && *argv[1] == 'v'; 313 int rc = 0; 314 315 /* 316 * first read out the real inventory values, these values are 317 * already stored in the local hush variables 318 */ 319 p = get_local_var("IVM_BoardId"); 320 if (p == NULL) { 321 printf("can't get the IVM_Boardid\n"); 322 return 1; 323 } 324 rc = strict_strtoul(p, 16, &ivmbid); 325 326 p = get_local_var("IVM_HWKey"); 327 if (p == NULL) { 328 printf("can't get the IVM_HWKey\n"); 329 return 1; 330 } 331 rc = strict_strtoul(p, 16, &ivmhwkey); 332 333 if (!ivmbid || !ivmhwkey) { 334 printf("Error: IVM_BoardId and/or IVM_HWKey not set!\n"); 335 return rc; 336 } 337 338 /* now try to read values from environment if available */ 339 p = getenv("boardid"); 340 if (p != NULL) 341 rc = strict_strtoul(p, 16, &envbid); 342 p = getenv("hwkey"); 343 if (p != NULL) 344 rc = strict_strtoul(p, 16, &envhwkey); 345 346 if (rc != 0) { 347 printf("strict_strtoul returns error: %d", rc); 348 return rc; 349 } 350 351 if (!envbid || !envhwkey) { 352 /* 353 * BoardId/HWkey not available in the environment, so try the 354 * environment variable for BoardId/HWkey list 355 */ 356 char *bidhwklist = getenv("boardIdListHex"); 357 358 if (bidhwklist) { 359 int found = 0; 360 char *rest = bidhwklist; 361 char *endp; 362 363 if (verbose) { 364 printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n", 365 ivmbid, ivmhwkey); 366 printf("boardIdHwKeyList: %s\n", 367 bidhwklist); 368 } 369 while (!found) { 370 /* loop over each bid/hwkey pair in the list */ 371 unsigned long bid = 0; 372 unsigned long hwkey = 0; 373 374 while (*rest && !isxdigit(*rest)) 375 rest++; 376 /* 377 * use simple_strtoul because we need &end and 378 * we know we got non numeric char at the end 379 */ 380 bid = simple_strtoul(rest, &endp, 16); 381 /* BoardId and HWkey are separated with a "_" */ 382 if (*endp == '_') { 383 rest = endp + 1; 384 /* 385 * use simple_strtoul because we need 386 * &end 387 */ 388 hwkey = simple_strtoul(rest, &endp, 16); 389 rest = endp; 390 while (*rest && !isxdigit(*rest)) 391 rest++; 392 } 393 if ((!bid) || (!hwkey)) { 394 /* end of list */ 395 break; 396 } 397 if (verbose) { 398 printf("trying bid=0x%lX, hwkey=%ld\n", 399 bid, hwkey); 400 } 401 /* 402 * Compare the values of the found entry in the 403 * list with the valid values which are stored 404 * in the inventory eeprom. If they are equal 405 * set the values in environment variables. 406 */ 407 if ((bid == ivmbid) && (hwkey == ivmhwkey)) { 408 char buf[10]; 409 410 found = 1; 411 envbid = bid; 412 envhwkey = hwkey; 413 sprintf(buf, "%lx", bid); 414 setenv("boardid", buf); 415 sprintf(buf, "%lx", hwkey); 416 setenv("hwkey", buf); 417 } 418 } /* end while( ! found ) */ 419 } 420 } 421 422 /* compare now the values */ 423 if ((ivmbid == envbid) && (ivmhwkey == envhwkey)) { 424 printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey); 425 rc = 0; /* match */ 426 } else { 427 printf("Error: env boardid=0x%3lX, hwkey=%ld\n", envbid, 428 envhwkey); 429 printf(" IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey); 430 rc = 1; /* don't match */ 431 } 432 return rc; 433 } 434 435 U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk, 436 "check boardid and hwkey", 437 "[v]\n - check environment parameter "\ 438 "\"boardIdListHex\" against stored boardid and hwkey "\ 439 "from the IVM\n v: verbose output" 440 ); 441