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 <cli_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 #if defined(CONFIG_KM_COMMON_ETH_INIT) 146 int board_eth_init(bd_t *bis) 147 { 148 if (ethernet_present()) 149 return cpu_eth_init(bis); 150 151 return -1; 152 } 153 #endif 154 155 /* 156 * do_setboardid command 157 * read out the board id and the hw key from the intventory EEPROM and set 158 * this values as environment variables. 159 */ 160 static int do_setboardid(cmd_tbl_t *cmdtp, int flag, int argc, 161 char *const argv[]) 162 { 163 unsigned char buf[32]; 164 char *p; 165 166 p = get_local_var("IVM_BoardId"); 167 if (p == NULL) { 168 printf("can't get the IVM_Boardid\n"); 169 return 1; 170 } 171 sprintf((char *)buf, "%s", p); 172 setenv("boardid", (char *)buf); 173 printf("set boardid=%s\n", buf); 174 175 p = get_local_var("IVM_HWKey"); 176 if (p == NULL) { 177 printf("can't get the IVM_HWKey\n"); 178 return 1; 179 } 180 sprintf((char *)buf, "%s", p); 181 setenv("hwkey", (char *)buf); 182 printf("set hwkey=%s\n", buf); 183 printf("Execute manually saveenv for persistent storage.\n"); 184 185 return 0; 186 } 187 188 U_BOOT_CMD(km_setboardid, 1, 0, do_setboardid, "setboardid", "read out bid and " 189 "hwkey from IVM and set in environment"); 190 191 /* 192 * command km_checkbidhwk 193 * if "boardid" and "hwkey" are not already set in the environment, do: 194 * if a "boardIdListHex" exists in the environment: 195 * - read ivm data for boardid and hwkey 196 * - compare each entry of the boardIdListHex with the 197 * IVM data: 198 * if match: 199 * set environment variables boardid, boardId, 200 * hwkey, hwKey to the found values 201 * both (boardid and boardId) are set because 202 * they might be used differently in the 203 * application and in the init scripts (?) 204 * return 0 in case of match, 1 if not match or error 205 */ 206 static int do_checkboardidhwk(cmd_tbl_t *cmdtp, int flag, int argc, 207 char *const argv[]) 208 { 209 unsigned long ivmbid = 0, ivmhwkey = 0; 210 unsigned long envbid = 0, envhwkey = 0; 211 char *p; 212 int verbose = argc > 1 && *argv[1] == 'v'; 213 int rc = 0; 214 215 /* 216 * first read out the real inventory values, these values are 217 * already stored in the local hush variables 218 */ 219 p = get_local_var("IVM_BoardId"); 220 if (p == NULL) { 221 printf("can't get the IVM_Boardid\n"); 222 return 1; 223 } 224 rc = strict_strtoul(p, 16, &ivmbid); 225 226 p = get_local_var("IVM_HWKey"); 227 if (p == NULL) { 228 printf("can't get the IVM_HWKey\n"); 229 return 1; 230 } 231 rc = strict_strtoul(p, 16, &ivmhwkey); 232 233 if (!ivmbid || !ivmhwkey) { 234 printf("Error: IVM_BoardId and/or IVM_HWKey not set!\n"); 235 return rc; 236 } 237 238 /* now try to read values from environment if available */ 239 p = getenv("boardid"); 240 if (p != NULL) 241 rc = strict_strtoul(p, 16, &envbid); 242 p = getenv("hwkey"); 243 if (p != NULL) 244 rc = strict_strtoul(p, 16, &envhwkey); 245 246 if (rc != 0) { 247 printf("strict_strtoul returns error: %d", rc); 248 return rc; 249 } 250 251 if (!envbid || !envhwkey) { 252 /* 253 * BoardId/HWkey not available in the environment, so try the 254 * environment variable for BoardId/HWkey list 255 */ 256 char *bidhwklist = getenv("boardIdListHex"); 257 258 if (bidhwklist) { 259 int found = 0; 260 char *rest = bidhwklist; 261 char *endp; 262 263 if (verbose) { 264 printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n", 265 ivmbid, ivmhwkey); 266 printf("boardIdHwKeyList: %s\n", 267 bidhwklist); 268 } 269 while (!found) { 270 /* loop over each bid/hwkey pair in the list */ 271 unsigned long bid = 0; 272 unsigned long hwkey = 0; 273 274 while (*rest && !isxdigit(*rest)) 275 rest++; 276 /* 277 * use simple_strtoul because we need &end and 278 * we know we got non numeric char at the end 279 */ 280 bid = simple_strtoul(rest, &endp, 16); 281 /* BoardId and HWkey are separated with a "_" */ 282 if (*endp == '_') { 283 rest = endp + 1; 284 /* 285 * use simple_strtoul because we need 286 * &end 287 */ 288 hwkey = simple_strtoul(rest, &endp, 16); 289 rest = endp; 290 while (*rest && !isxdigit(*rest)) 291 rest++; 292 } 293 if ((!bid) || (!hwkey)) { 294 /* end of list */ 295 break; 296 } 297 if (verbose) { 298 printf("trying bid=0x%lX, hwkey=%ld\n", 299 bid, hwkey); 300 } 301 /* 302 * Compare the values of the found entry in the 303 * list with the valid values which are stored 304 * in the inventory eeprom. If they are equal 305 * set the values in environment variables. 306 */ 307 if ((bid == ivmbid) && (hwkey == ivmhwkey)) { 308 char buf[10]; 309 310 found = 1; 311 envbid = bid; 312 envhwkey = hwkey; 313 sprintf(buf, "%lx", bid); 314 setenv("boardid", buf); 315 sprintf(buf, "%lx", hwkey); 316 setenv("hwkey", buf); 317 } 318 } /* end while( ! found ) */ 319 } 320 } 321 322 /* compare now the values */ 323 if ((ivmbid == envbid) && (ivmhwkey == envhwkey)) { 324 printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey); 325 rc = 0; /* match */ 326 } else { 327 printf("Error: env boardid=0x%3lX, hwkey=%ld\n", envbid, 328 envhwkey); 329 printf(" IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey); 330 rc = 1; /* don't match */ 331 } 332 return rc; 333 } 334 335 U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk, 336 "check boardid and hwkey", 337 "[v]\n - check environment parameter "\ 338 "\"boardIdListHex\" against stored boardid and hwkey "\ 339 "from the IVM\n v: verbose output" 340 ); 341 342 /* 343 * command km_checktestboot 344 * if the testpin of the board is asserted, return 1 345 * * else return 0 346 */ 347 static int do_checktestboot(cmd_tbl_t *cmdtp, int flag, int argc, 348 char *const argv[]) 349 { 350 int testpin = 0; 351 char *s = NULL; 352 int testboot = 0; 353 int verbose = argc > 1 && *argv[1] == 'v'; 354 355 #if defined(CONFIG_POST) 356 testpin = post_hotkeys_pressed(); 357 s = getenv("test_bank"); 358 #endif 359 /* when test_bank is not set, act as if testpin is not asserted */ 360 testboot = (testpin != 0) && (s); 361 if (verbose) { 362 printf("testpin = %d\n", testpin); 363 /* cppcheck-suppress nullPointer */ 364 printf("test_bank = %s\n", s ? s : "not set"); 365 printf("boot test app : %s\n", (testboot) ? "yes" : "no"); 366 } 367 /* return 0 means: testboot, therefore we need the inversion */ 368 return !testboot; 369 } 370 371 U_BOOT_CMD(km_checktestboot, 2, 0, do_checktestboot, 372 "check if testpin is asserted", 373 "[v]\n v - verbose output" 374 ); 375