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 * SPDX-License-Identifier: GPL-2.0+ 9 */ 10 11 #include <common.h> 12 #include <ioports.h> 13 #include <command.h> 14 #include <malloc.h> 15 #include <hush.h> 16 #include <net.h> 17 #include <netdev.h> 18 #include <asm/io.h> 19 #include <linux/ctype.h> 20 21 #if defined(CONFIG_POST) 22 #include "post.h" 23 #endif 24 #include "common.h" 25 #include <i2c.h> 26 27 DECLARE_GLOBAL_DATA_PTR; 28 29 /* 30 * Set Keymile specific environment variables 31 * Currently only some memory layout variables are calculated here 32 * ... ------------------------------------------------ 33 * ... |@rootfsaddr |@pnvramaddr |@varaddr |@reserved |@END_OF_RAM 34 * ... |<------------------- pram ------------------->| 35 * ... ------------------------------------------------ 36 * @END_OF_RAM: denotes the RAM size 37 * @pnvramaddr: Startadress of pseudo non volatile RAM in hex 38 * @pram : preserved ram size in k 39 * @varaddr : startadress for /var mounted into RAM 40 */ 41 int set_km_env(void) 42 { 43 uchar buf[32]; 44 unsigned int pnvramaddr; 45 unsigned int pram; 46 unsigned int varaddr; 47 unsigned int kernelmem; 48 char *p; 49 unsigned long rootfssize = 0; 50 51 pnvramaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM 52 - CONFIG_KM_PNVRAM; 53 sprintf((char *)buf, "0x%x", pnvramaddr); 54 setenv("pnvramaddr", (char *)buf); 55 56 /* try to read rootfssize (ram image) from envrionment */ 57 p = getenv("rootfssize"); 58 if (p != NULL) 59 strict_strtoul(p, 16, &rootfssize); 60 pram = (rootfssize + CONFIG_KM_RESERVED_PRAM + CONFIG_KM_PHRAM + 61 CONFIG_KM_PNVRAM) / 0x400; 62 sprintf((char *)buf, "0x%x", pram); 63 setenv("pram", (char *)buf); 64 65 varaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM; 66 sprintf((char *)buf, "0x%x", varaddr); 67 setenv("varaddr", (char *)buf); 68 69 kernelmem = gd->ram_size - 0x400 * pram; 70 sprintf((char *)buf, "0x%x", kernelmem); 71 setenv("kernelmem", (char *)buf); 72 73 return 0; 74 } 75 76 #if defined(CONFIG_SYS_I2C_INIT_BOARD) 77 static void i2c_write_start_seq(void) 78 { 79 set_sda(1); 80 udelay(DELAY_HALF_PERIOD); 81 set_scl(1); 82 udelay(DELAY_HALF_PERIOD); 83 set_sda(0); 84 udelay(DELAY_HALF_PERIOD); 85 set_scl(0); 86 udelay(DELAY_HALF_PERIOD); 87 } 88 89 /* 90 * I2C is a synchronous protocol and resets of the processor in the middle 91 * of an access can block the I2C Bus until a powerdown of the full unit is 92 * done. This function toggles the SCL until the SCL and SCA line are 93 * released, but max. 16 times, after this a I2C start-sequence is sent. 94 * This I2C Deblocking mechanism was developed by Keymile in association 95 * with Anatech and Atmel in 1998. 96 */ 97 int i2c_make_abort(void) 98 { 99 int scl_state = 0; 100 int sda_state = 0; 101 int i = 0; 102 int ret = 0; 103 104 if (!get_sda()) { 105 ret = -1; 106 while (i < 16) { 107 i++; 108 set_scl(0); 109 udelay(DELAY_ABORT_SEQ); 110 set_scl(1); 111 udelay(DELAY_ABORT_SEQ); 112 scl_state = get_scl(); 113 sda_state = get_sda(); 114 if (scl_state && sda_state) { 115 ret = 0; 116 break; 117 } 118 } 119 } 120 if (ret == 0) 121 for (i = 0; i < 5; i++) 122 i2c_write_start_seq(); 123 124 /* respect stop setup time */ 125 udelay(DELAY_ABORT_SEQ); 126 set_scl(1); 127 udelay(DELAY_ABORT_SEQ); 128 set_sda(1); 129 get_sda(); 130 131 return ret; 132 } 133 134 /** 135 * i2c_init_board - reset i2c bus. When the board is powercycled during a 136 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions. 137 */ 138 void i2c_init_board(void) 139 { 140 /* Now run the AbortSequence() */ 141 i2c_make_abort(); 142 } 143 #endif 144 145 int board_eth_init(bd_t *bis) 146 { 147 if (ethernet_present()) 148 return cpu_eth_init(bis); 149 150 return -1; 151 } 152 153 /* 154 * do_setboardid command 155 * read out the board id and the hw key from the intventory EEPROM and set 156 * this values as environment variables. 157 */ 158 static int do_setboardid(cmd_tbl_t *cmdtp, int flag, int argc, 159 char *const argv[]) 160 { 161 unsigned char buf[32]; 162 char *p; 163 164 p = get_local_var("IVM_BoardId"); 165 if (p == NULL) { 166 printf("can't get the IVM_Boardid\n"); 167 return 1; 168 } 169 sprintf((char *)buf, "%s", p); 170 setenv("boardid", (char *)buf); 171 printf("set boardid=%s\n", buf); 172 173 p = get_local_var("IVM_HWKey"); 174 if (p == NULL) { 175 printf("can't get the IVM_HWKey\n"); 176 return 1; 177 } 178 sprintf((char *)buf, "%s", p); 179 setenv("hwkey", (char *)buf); 180 printf("set hwkey=%s\n", buf); 181 printf("Execute manually saveenv for persistent storage.\n"); 182 183 return 0; 184 } 185 186 U_BOOT_CMD(km_setboardid, 1, 0, do_setboardid, "setboardid", "read out bid and " 187 "hwkey from IVM and set in environment"); 188 189 /* 190 * command km_checkbidhwk 191 * if "boardid" and "hwkey" are not already set in the environment, do: 192 * if a "boardIdListHex" exists in the environment: 193 * - read ivm data for boardid and hwkey 194 * - compare each entry of the boardIdListHex with the 195 * IVM data: 196 * if match: 197 * set environment variables boardid, boardId, 198 * hwkey, hwKey to the found values 199 * both (boardid and boardId) are set because 200 * they might be used differently in the 201 * application and in the init scripts (?) 202 * return 0 in case of match, 1 if not match or error 203 */ 204 static int do_checkboardidhwk(cmd_tbl_t *cmdtp, int flag, int argc, 205 char *const argv[]) 206 { 207 unsigned long ivmbid = 0, ivmhwkey = 0; 208 unsigned long envbid = 0, envhwkey = 0; 209 char *p; 210 int verbose = argc > 1 && *argv[1] == 'v'; 211 int rc = 0; 212 213 /* 214 * first read out the real inventory values, these values are 215 * already stored in the local hush variables 216 */ 217 p = get_local_var("IVM_BoardId"); 218 if (p == NULL) { 219 printf("can't get the IVM_Boardid\n"); 220 return 1; 221 } 222 rc = strict_strtoul(p, 16, &ivmbid); 223 224 p = get_local_var("IVM_HWKey"); 225 if (p == NULL) { 226 printf("can't get the IVM_HWKey\n"); 227 return 1; 228 } 229 rc = strict_strtoul(p, 16, &ivmhwkey); 230 231 if (!ivmbid || !ivmhwkey) { 232 printf("Error: IVM_BoardId and/or IVM_HWKey not set!\n"); 233 return rc; 234 } 235 236 /* now try to read values from environment if available */ 237 p = getenv("boardid"); 238 if (p != NULL) 239 rc = strict_strtoul(p, 16, &envbid); 240 p = getenv("hwkey"); 241 if (p != NULL) 242 rc = strict_strtoul(p, 16, &envhwkey); 243 244 if (rc != 0) { 245 printf("strict_strtoul returns error: %d", rc); 246 return rc; 247 } 248 249 if (!envbid || !envhwkey) { 250 /* 251 * BoardId/HWkey not available in the environment, so try the 252 * environment variable for BoardId/HWkey list 253 */ 254 char *bidhwklist = getenv("boardIdListHex"); 255 256 if (bidhwklist) { 257 int found = 0; 258 char *rest = bidhwklist; 259 char *endp; 260 261 if (verbose) { 262 printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n", 263 ivmbid, ivmhwkey); 264 printf("boardIdHwKeyList: %s\n", 265 bidhwklist); 266 } 267 while (!found) { 268 /* loop over each bid/hwkey pair in the list */ 269 unsigned long bid = 0; 270 unsigned long hwkey = 0; 271 272 while (*rest && !isxdigit(*rest)) 273 rest++; 274 /* 275 * use simple_strtoul because we need &end and 276 * we know we got non numeric char at the end 277 */ 278 bid = simple_strtoul(rest, &endp, 16); 279 /* BoardId and HWkey are separated with a "_" */ 280 if (*endp == '_') { 281 rest = endp + 1; 282 /* 283 * use simple_strtoul because we need 284 * &end 285 */ 286 hwkey = simple_strtoul(rest, &endp, 16); 287 rest = endp; 288 while (*rest && !isxdigit(*rest)) 289 rest++; 290 } 291 if ((!bid) || (!hwkey)) { 292 /* end of list */ 293 break; 294 } 295 if (verbose) { 296 printf("trying bid=0x%lX, hwkey=%ld\n", 297 bid, hwkey); 298 } 299 /* 300 * Compare the values of the found entry in the 301 * list with the valid values which are stored 302 * in the inventory eeprom. If they are equal 303 * set the values in environment variables. 304 */ 305 if ((bid == ivmbid) && (hwkey == ivmhwkey)) { 306 char buf[10]; 307 308 found = 1; 309 envbid = bid; 310 envhwkey = hwkey; 311 sprintf(buf, "%lx", bid); 312 setenv("boardid", buf); 313 sprintf(buf, "%lx", hwkey); 314 setenv("hwkey", buf); 315 } 316 } /* end while( ! found ) */ 317 } 318 } 319 320 /* compare now the values */ 321 if ((ivmbid == envbid) && (ivmhwkey == envhwkey)) { 322 printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey); 323 rc = 0; /* match */ 324 } else { 325 printf("Error: env boardid=0x%3lX, hwkey=%ld\n", envbid, 326 envhwkey); 327 printf(" IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey); 328 rc = 1; /* don't match */ 329 } 330 return rc; 331 } 332 333 U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk, 334 "check boardid and hwkey", 335 "[v]\n - check environment parameter "\ 336 "\"boardIdListHex\" against stored boardid and hwkey "\ 337 "from the IVM\n v: verbose output" 338 ); 339 340 /* 341 * command km_checktestboot 342 * if the testpin of the board is asserted, return 1 343 * * else return 0 344 */ 345 static int do_checktestboot(cmd_tbl_t *cmdtp, int flag, int argc, 346 char *const argv[]) 347 { 348 int testpin = 0; 349 char *s = NULL; 350 int testboot = 0; 351 int verbose = argc > 1 && *argv[1] == 'v'; 352 353 #if defined(CONFIG_POST) 354 testpin = post_hotkeys_pressed(); 355 s = getenv("test_bank"); 356 #endif 357 /* when test_bank is not set, act as if testpin is not asserted */ 358 testboot = (testpin != 0) && (s); 359 if (verbose) { 360 printf("testpin = %d\n", testpin); 361 printf("test_bank = %s\n", s ? s : "not set"); 362 printf("boot test app : %s\n", (testboot) ? "yes" : "no"); 363 } 364 /* return 0 means: testboot, therefore we need the inversion */ 365 return !testboot; 366 } 367 368 U_BOOT_CMD(km_checktestboot, 2, 0, do_checktestboot, 369 "check if testpin is asserted", 370 "[v]\n v - verbose output" 371 ); 372