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 #if !defined(CONFIG_MPC83xx) 43 static void i2c_write_start_seq(void); 44 #endif 45 46 DECLARE_GLOBAL_DATA_PTR; 47 48 /* 49 * Set Keymile specific environment variables 50 * Currently only some memory layout variables are calculated here 51 * ... ------------------------------------------------ 52 * ... |@rootfsaddr |@pnvramaddr |@varaddr |@reserved |@END_OF_RAM 53 * ... |<------------------- pram ------------------->| 54 * ... ------------------------------------------------ 55 * @END_OF_RAM: denotes the RAM size 56 * @pnvramaddr: Startadress of pseudo non volatile RAM in hex 57 * @pram : preserved ram size in k 58 * @varaddr : startadress for /var mounted into RAM 59 */ 60 int set_km_env(void) 61 { 62 uchar buf[32]; 63 unsigned int pnvramaddr; 64 unsigned int pram; 65 unsigned int varaddr; 66 unsigned int kernelmem; 67 char *p; 68 unsigned long rootfssize = 0; 69 70 pnvramaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM 71 - CONFIG_KM_PNVRAM; 72 sprintf((char *)buf, "0x%x", pnvramaddr); 73 setenv("pnvramaddr", (char *)buf); 74 75 /* try to read rootfssize (ram image) from envrionment */ 76 p = getenv("rootfssize"); 77 if (p != NULL) 78 strict_strtoul(p, 16, &rootfssize); 79 pram = (rootfssize + CONFIG_KM_RESERVED_PRAM + CONFIG_KM_PHRAM + 80 CONFIG_KM_PNVRAM) / 0x400; 81 sprintf((char *)buf, "0x%x", pram); 82 setenv("pram", (char *)buf); 83 84 varaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM; 85 sprintf((char *)buf, "0x%x", varaddr); 86 setenv("varaddr", (char *)buf); 87 88 kernelmem = gd->ram_size - 0x400 * pram; 89 sprintf((char *)buf, "0x%x", kernelmem); 90 setenv("kernelmem", (char *)buf); 91 92 return 0; 93 } 94 95 #if defined(CONFIG_SYS_I2C_INIT_BOARD) 96 #if !defined(CONFIG_MPC83xx) 97 static void i2c_write_start_seq(void) 98 { 99 set_sda(1); 100 udelay(DELAY_HALF_PERIOD); 101 set_scl(1); 102 udelay(DELAY_HALF_PERIOD); 103 set_sda(0); 104 udelay(DELAY_HALF_PERIOD); 105 set_scl(0); 106 udelay(DELAY_HALF_PERIOD); 107 } 108 109 /* 110 * I2C is a synchronous protocol and resets of the processor in the middle 111 * of an access can block the I2C Bus until a powerdown of the full unit is 112 * done. This function toggles the SCL until the SCL and SCA line are 113 * released, but max. 16 times, after this a I2C start-sequence is sent. 114 * This I2C Deblocking mechanism was developed by Keymile in association 115 * with Anatech and Atmel in 1998. 116 */ 117 int i2c_make_abort(void) 118 { 119 120 #if defined(CONFIG_HARD_I2C) && !defined(MACH_TYPE_KM_KIRKWOOD) 121 immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ; 122 i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c; 123 124 /* 125 * disable I2C controller first, otherwhise it thinks we want to 126 * talk to the slave port... 127 */ 128 clrbits_8(&i2c->i2c_i2mod, 0x01); 129 130 /* Set the PortPins to GPIO */ 131 setports(1); 132 #endif 133 134 int scl_state = 0; 135 int sda_state = 0; 136 int i = 0; 137 int ret = 0; 138 139 if (!get_sda()) { 140 ret = -1; 141 while (i < 16) { 142 i++; 143 set_scl(0); 144 udelay(DELAY_ABORT_SEQ); 145 set_scl(1); 146 udelay(DELAY_ABORT_SEQ); 147 scl_state = get_scl(); 148 sda_state = get_sda(); 149 if (scl_state && sda_state) { 150 ret = 0; 151 printf("[INFO] i2c abort after %d clocks\n", i); 152 break; 153 } 154 } 155 } 156 if (ret == 0) 157 for (i = 0; i < 5; i++) 158 i2c_write_start_seq(); 159 else 160 printf("[ERROR] i2c abort failed\n"); 161 162 /* respect stop setup time */ 163 udelay(DELAY_ABORT_SEQ); 164 set_scl(1); 165 udelay(DELAY_ABORT_SEQ); 166 set_sda(1); 167 get_sda(); 168 169 #if defined(CONFIG_HARD_I2C) 170 /* Set the PortPins back to use for I2C */ 171 setports(0); 172 #endif 173 return ret; 174 } 175 #endif 176 177 /** 178 * i2c_init_board - reset i2c bus. When the board is powercycled during a 179 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions. 180 */ 181 void i2c_init_board(void) 182 { 183 /* Now run the AbortSequence() */ 184 i2c_make_abort(); 185 } 186 #endif 187 188 189 #if !defined(MACH_TYPE_KM_KIRKWOOD) 190 int ethernet_present(void) 191 { 192 struct km_bec_fpga *base = 193 (struct km_bec_fpga *)CONFIG_SYS_KMBEC_FPGA_BASE; 194 195 return in_8(&base->bprth) & PIGGY_PRESENT; 196 } 197 #endif 198 199 int board_eth_init(bd_t *bis) 200 { 201 if (ethernet_present()) 202 return cpu_eth_init(bis); 203 204 return -1; 205 } 206 207 /* 208 * do_setboardid command 209 * read out the board id and the hw key from the intventory EEPROM and set 210 * this values as environment variables. 211 */ 212 static int do_setboardid(cmd_tbl_t *cmdtp, int flag, int argc, 213 char *const argv[]) 214 { 215 unsigned char buf[32]; 216 char *p; 217 218 p = get_local_var("IVM_BoardId"); 219 if (p == NULL) { 220 printf("can't get the IVM_Boardid\n"); 221 return 1; 222 } 223 sprintf((char *)buf, "%s", p); 224 setenv("boardid", (char *)buf); 225 printf("set boardid=%s\n", buf); 226 227 p = get_local_var("IVM_HWKey"); 228 if (p == NULL) { 229 printf("can't get the IVM_HWKey\n"); 230 return 1; 231 } 232 sprintf((char *)buf, "%s", p); 233 setenv("hwkey", (char *)buf); 234 printf("set hwkey=%s\n", buf); 235 printf("Execute manually saveenv for persistent storage.\n"); 236 237 return 0; 238 } 239 240 U_BOOT_CMD(km_setboardid, 1, 0, do_setboardid, "setboardid", "read out bid and " 241 "hwkey from IVM and set in environment"); 242 243 /* 244 * command km_checkbidhwk 245 * if "boardid" and "hwkey" are not already set in the environment, do: 246 * if a "boardIdListHex" exists in the environment: 247 * - read ivm data for boardid and hwkey 248 * - compare each entry of the boardIdListHex with the 249 * IVM data: 250 * if match: 251 * set environment variables boardid, boardId, 252 * hwkey, hwKey to the found values 253 * both (boardid and boardId) are set because 254 * they might be used differently in the 255 * application and in the init scripts (?) 256 * return 0 in case of match, 1 if not match or error 257 */ 258 int do_checkboardidhwk(cmd_tbl_t *cmdtp, int flag, int argc, 259 char *const argv[]) 260 { 261 unsigned long ivmbid = 0, ivmhwkey = 0; 262 unsigned long envbid = 0, envhwkey = 0; 263 char *p; 264 int verbose = argc > 1 && *argv[1] == 'v'; 265 int rc = 0; 266 267 /* 268 * first read out the real inventory values, these values are 269 * already stored in the local hush variables 270 */ 271 p = get_local_var("IVM_BoardId"); 272 if (p == NULL) { 273 printf("can't get the IVM_Boardid\n"); 274 return 1; 275 } 276 rc = strict_strtoul(p, 16, &ivmbid); 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 rc = strict_strtoul(p, 16, &ivmhwkey); 284 285 if (!ivmbid || !ivmhwkey) { 286 printf("Error: IVM_BoardId and/or IVM_HWKey not set!\n"); 287 return rc; 288 } 289 290 /* now try to read values from environment if available */ 291 p = getenv("boardid"); 292 if (p != NULL) 293 rc = strict_strtoul(p, 16, &envbid); 294 p = getenv("hwkey"); 295 if (p != NULL) 296 rc = strict_strtoul(p, 16, &envhwkey); 297 298 if (rc != 0) { 299 printf("strict_strtoul returns error: %d", rc); 300 return rc; 301 } 302 303 if (!envbid || !envhwkey) { 304 /* 305 * BoardId/HWkey not available in the environment, so try the 306 * environment variable for BoardId/HWkey list 307 */ 308 char *bidhwklist = getenv("boardIdListHex"); 309 310 if (bidhwklist) { 311 int found = 0; 312 char *rest = bidhwklist; 313 char *endp; 314 315 if (verbose) { 316 printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n", 317 ivmbid, ivmhwkey); 318 printf("boardIdHwKeyList: %s\n", 319 bidhwklist); 320 } 321 while (!found) { 322 /* loop over each bid/hwkey pair in the list */ 323 unsigned long bid = 0; 324 unsigned long hwkey = 0; 325 326 while (*rest && !isxdigit(*rest)) 327 rest++; 328 /* 329 * use simple_strtoul because we need &end and 330 * we know we got non numeric char at the end 331 */ 332 bid = simple_strtoul(rest, &endp, 16); 333 /* BoardId and HWkey are separated with a "_" */ 334 if (*endp == '_') { 335 rest = endp + 1; 336 /* 337 * use simple_strtoul because we need 338 * &end 339 */ 340 hwkey = simple_strtoul(rest, &endp, 16); 341 rest = endp; 342 while (*rest && !isxdigit(*rest)) 343 rest++; 344 } 345 if ((!bid) || (!hwkey)) { 346 /* end of list */ 347 break; 348 } 349 if (verbose) { 350 printf("trying bid=0x%lX, hwkey=%ld\n", 351 bid, hwkey); 352 } 353 /* 354 * Compare the values of the found entry in the 355 * list with the valid values which are stored 356 * in the inventory eeprom. If they are equal 357 * set the values in environment variables. 358 */ 359 if ((bid == ivmbid) && (hwkey == ivmhwkey)) { 360 char buf[10]; 361 362 found = 1; 363 envbid = bid; 364 envhwkey = hwkey; 365 sprintf(buf, "%lx", bid); 366 setenv("boardid", buf); 367 sprintf(buf, "%lx", hwkey); 368 setenv("hwkey", buf); 369 } 370 } /* end while( ! found ) */ 371 } 372 } 373 374 /* compare now the values */ 375 if ((ivmbid == envbid) && (ivmhwkey == envhwkey)) { 376 printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey); 377 rc = 0; /* match */ 378 } else { 379 printf("Error: env boardid=0x%3lX, hwkey=%ld\n", envbid, 380 envhwkey); 381 printf(" IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey); 382 rc = 1; /* don't match */ 383 } 384 return rc; 385 } 386 387 U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk, 388 "check boardid and hwkey", 389 "[v]\n - check environment parameter "\ 390 "\"boardIdListHex\" against stored boardid and hwkey "\ 391 "from the IVM\n v: verbose output" 392 ); 393