1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2008 4 * Heiko Schocher, DENX Software Engineering, hs@denx.de. 5 * 6 * (C) Copyright 2011 7 * Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.com 8 */ 9 10 #include <common.h> 11 #include <ioports.h> 12 #include <command.h> 13 #include <malloc.h> 14 #include <cli_hush.h> 15 #include <net.h> 16 #include <netdev.h> 17 #include <asm/io.h> 18 #include <linux/ctype.h> 19 20 #if defined(CONFIG_POST) 21 #include "post.h" 22 #endif 23 #include "common.h" 24 #include <i2c.h> 25 26 DECLARE_GLOBAL_DATA_PTR; 27 28 /* 29 * Set Keymile specific environment variables 30 * Currently only some memory layout variables are calculated here 31 * ... ------------------------------------------------ 32 * ... |@rootfsaddr |@pnvramaddr |@varaddr |@reserved |@END_OF_RAM 33 * ... |<------------------- pram ------------------->| 34 * ... ------------------------------------------------ 35 * @END_OF_RAM: denotes the RAM size 36 * @pnvramaddr: Startadress of pseudo non volatile RAM in hex 37 * @pram : preserved ram size in k 38 * @varaddr : startadress for /var mounted into RAM 39 */ 40 int set_km_env(void) 41 { 42 uchar buf[32]; 43 unsigned int pnvramaddr; 44 unsigned int pram; 45 unsigned int varaddr; 46 unsigned int kernelmem; 47 char *p; 48 unsigned long rootfssize = 0; 49 50 pnvramaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM 51 - CONFIG_KM_PNVRAM; 52 sprintf((char *)buf, "0x%x", pnvramaddr); 53 env_set("pnvramaddr", (char *)buf); 54 55 /* try to read rootfssize (ram image) from environment */ 56 p = env_get("rootfssize"); 57 if (p != NULL) 58 strict_strtoul(p, 16, &rootfssize); 59 pram = (rootfssize + CONFIG_KM_RESERVED_PRAM + CONFIG_KM_PHRAM + 60 CONFIG_KM_PNVRAM) / 0x400; 61 sprintf((char *)buf, "0x%x", pram); 62 env_set("pram", (char *)buf); 63 64 varaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM; 65 sprintf((char *)buf, "0x%x", varaddr); 66 env_set("varaddr", (char *)buf); 67 68 kernelmem = gd->ram_size - 0x400 * pram; 69 sprintf((char *)buf, "0x%x", kernelmem); 70 env_set("kernelmem", (char *)buf); 71 72 return 0; 73 } 74 75 #if defined(CONFIG_SYS_I2C_INIT_BOARD) 76 static void i2c_write_start_seq(void) 77 { 78 set_sda(1); 79 udelay(DELAY_HALF_PERIOD); 80 set_scl(1); 81 udelay(DELAY_HALF_PERIOD); 82 set_sda(0); 83 udelay(DELAY_HALF_PERIOD); 84 set_scl(0); 85 udelay(DELAY_HALF_PERIOD); 86 } 87 88 /* 89 * I2C is a synchronous protocol and resets of the processor in the middle 90 * of an access can block the I2C Bus until a powerdown of the full unit is 91 * done. This function toggles the SCL until the SCL and SCA line are 92 * released, but max. 16 times, after this a I2C start-sequence is sent. 93 * This I2C Deblocking mechanism was developed by Keymile in association 94 * with Anatech and Atmel in 1998. 95 */ 96 int i2c_make_abort(void) 97 { 98 int scl_state = 0; 99 int sda_state = 0; 100 int i = 0; 101 int ret = 0; 102 103 if (!get_sda()) { 104 ret = -1; 105 while (i < 16) { 106 i++; 107 set_scl(0); 108 udelay(DELAY_ABORT_SEQ); 109 set_scl(1); 110 udelay(DELAY_ABORT_SEQ); 111 scl_state = get_scl(); 112 sda_state = get_sda(); 113 if (scl_state && sda_state) { 114 ret = 0; 115 break; 116 } 117 } 118 } 119 if (ret == 0) 120 for (i = 0; i < 5; i++) 121 i2c_write_start_seq(); 122 123 /* respect stop setup time */ 124 udelay(DELAY_ABORT_SEQ); 125 set_scl(1); 126 udelay(DELAY_ABORT_SEQ); 127 set_sda(1); 128 get_sda(); 129 130 return ret; 131 } 132 133 /** 134 * i2c_init_board - reset i2c bus. When the board is powercycled during a 135 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions. 136 */ 137 void i2c_init_board(void) 138 { 139 /* Now run the AbortSequence() */ 140 i2c_make_abort(); 141 } 142 #endif 143 144 #if defined(CONFIG_KM_COMMON_ETH_INIT) 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 #endif 153 154 /* 155 * do_setboardid command 156 * read out the board id and the hw key from the intventory EEPROM and set 157 * this values as environment variables. 158 */ 159 static int do_setboardid(cmd_tbl_t *cmdtp, int flag, int argc, 160 char *const argv[]) 161 { 162 unsigned char buf[32]; 163 char *p; 164 165 p = get_local_var("IVM_BoardId"); 166 if (p == NULL) { 167 printf("can't get the IVM_Boardid\n"); 168 return 1; 169 } 170 strcpy((char *)buf, p); 171 env_set("boardid", (char *)buf); 172 printf("set boardid=%s\n", buf); 173 174 p = get_local_var("IVM_HWKey"); 175 if (p == NULL) { 176 printf("can't get the IVM_HWKey\n"); 177 return 1; 178 } 179 strcpy((char *)buf, p); 180 env_set("hwkey", (char *)buf); 181 printf("set hwkey=%s\n", buf); 182 printf("Execute manually saveenv for persistent storage.\n"); 183 184 return 0; 185 } 186 187 U_BOOT_CMD(km_setboardid, 1, 0, do_setboardid, "setboardid", "read out bid and " 188 "hwkey from IVM and set in environment"); 189 190 /* 191 * command km_checkbidhwk 192 * if "boardid" and "hwkey" are not already set in the environment, do: 193 * if a "boardIdListHex" exists in the environment: 194 * - read ivm data for boardid and hwkey 195 * - compare each entry of the boardIdListHex with the 196 * IVM data: 197 * if match: 198 * set environment variables boardid, boardId, 199 * hwkey, hwKey to the found values 200 * both (boardid and boardId) are set because 201 * they might be used differently in the 202 * application and in the init scripts (?) 203 * return 0 in case of match, 1 if not match or error 204 */ 205 static int do_checkboardidhwk(cmd_tbl_t *cmdtp, int flag, int argc, 206 char *const argv[]) 207 { 208 unsigned long ivmbid = 0, ivmhwkey = 0; 209 unsigned long envbid = 0, envhwkey = 0; 210 char *p; 211 int verbose = argc > 1 && *argv[1] == 'v'; 212 int rc = 0; 213 214 /* 215 * first read out the real inventory values, these values are 216 * already stored in the local hush variables 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 rc = strict_strtoul(p, 16, &ivmbid); 224 225 p = get_local_var("IVM_HWKey"); 226 if (p == NULL) { 227 printf("can't get the IVM_HWKey\n"); 228 return 1; 229 } 230 rc = strict_strtoul(p, 16, &ivmhwkey); 231 232 if (!ivmbid || !ivmhwkey) { 233 printf("Error: IVM_BoardId and/or IVM_HWKey not set!\n"); 234 return rc; 235 } 236 237 /* now try to read values from environment if available */ 238 p = env_get("boardid"); 239 if (p != NULL) 240 rc = strict_strtoul(p, 16, &envbid); 241 p = env_get("hwkey"); 242 if (p != NULL) 243 rc = strict_strtoul(p, 16, &envhwkey); 244 245 if (rc != 0) { 246 printf("strict_strtoul returns error: %d", rc); 247 return rc; 248 } 249 250 if (!envbid || !envhwkey) { 251 /* 252 * BoardId/HWkey not available in the environment, so try the 253 * environment variable for BoardId/HWkey list 254 */ 255 char *bidhwklist = env_get("boardIdListHex"); 256 257 if (bidhwklist) { 258 int found = 0; 259 char *rest = bidhwklist; 260 char *endp; 261 262 if (verbose) { 263 printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n", 264 ivmbid, ivmhwkey); 265 printf("boardIdHwKeyList: %s\n", 266 bidhwklist); 267 } 268 while (!found) { 269 /* loop over each bid/hwkey pair in the list */ 270 unsigned long bid = 0; 271 unsigned long hwkey = 0; 272 273 while (*rest && !isxdigit(*rest)) 274 rest++; 275 /* 276 * use simple_strtoul because we need &end and 277 * we know we got non numeric char at the end 278 */ 279 bid = simple_strtoul(rest, &endp, 16); 280 /* BoardId and HWkey are separated with a "_" */ 281 if (*endp == '_') { 282 rest = endp + 1; 283 /* 284 * use simple_strtoul because we need 285 * &end 286 */ 287 hwkey = simple_strtoul(rest, &endp, 16); 288 rest = endp; 289 while (*rest && !isxdigit(*rest)) 290 rest++; 291 } 292 if ((!bid) || (!hwkey)) { 293 /* end of list */ 294 break; 295 } 296 if (verbose) { 297 printf("trying bid=0x%lX, hwkey=%ld\n", 298 bid, hwkey); 299 } 300 /* 301 * Compare the values of the found entry in the 302 * list with the valid values which are stored 303 * in the inventory eeprom. If they are equal 304 * set the values in environment variables. 305 */ 306 if ((bid == ivmbid) && (hwkey == ivmhwkey)) { 307 char buf[10]; 308 309 found = 1; 310 envbid = bid; 311 envhwkey = hwkey; 312 sprintf(buf, "%lx", bid); 313 env_set("boardid", buf); 314 sprintf(buf, "%lx", hwkey); 315 env_set("hwkey", buf); 316 } 317 } /* end while( ! found ) */ 318 } 319 } 320 321 /* compare now the values */ 322 if ((ivmbid == envbid) && (ivmhwkey == envhwkey)) { 323 printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey); 324 rc = 0; /* match */ 325 } else { 326 printf("Error: env boardid=0x%3lX, hwkey=%ld\n", envbid, 327 envhwkey); 328 printf(" IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey); 329 rc = 1; /* don't match */ 330 } 331 return rc; 332 } 333 334 U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk, 335 "check boardid and hwkey", 336 "[v]\n - check environment parameter "\ 337 "\"boardIdListHex\" against stored boardid and hwkey "\ 338 "from the IVM\n v: verbose output" 339 ); 340 341 /* 342 * command km_checktestboot 343 * if the testpin of the board is asserted, return 1 344 * * else return 0 345 */ 346 static int do_checktestboot(cmd_tbl_t *cmdtp, int flag, int argc, 347 char *const argv[]) 348 { 349 int testpin = 0; 350 char *s = NULL; 351 int testboot = 0; 352 int verbose = argc > 1 && *argv[1] == 'v'; 353 354 #if defined(CONFIG_POST) 355 testpin = post_hotkeys_pressed(); 356 #endif 357 s = env_get("test_bank"); 358 /* when test_bank is not set, act as if testpin is not asserted */ 359 testboot = (testpin != 0) && (s); 360 if (verbose) { 361 printf("testpin = %d\n", testpin); 362 /* cppcheck-suppress nullPointer */ 363 printf("test_bank = %s\n", s ? s : "not set"); 364 printf("boot test app : %s\n", (testboot) ? "yes" : "no"); 365 } 366 /* return 0 means: testboot, therefore we need the inversion */ 367 return !testboot; 368 } 369 370 U_BOOT_CMD(km_checktestboot, 2, 0, do_checktestboot, 371 "check if testpin is asserted", 372 "[v]\n v - verbose output" 373 ); 374