board/keymile/common/common.c

   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 #if !defined(CONFIG_MPC83xx)
  28 static void i2c_write_start_seq(void);
  29 #endif
  30
  31 DECLARE_GLOBAL_DATA_PTR;
  32
  33 /*
  34  * Set Keymile specific environment variables
  35  * Currently only some memory layout variables are calculated here
  36  * ... ------------------------------------------------
  37  * ... |@rootfsaddr |@pnvramaddr |@varaddr |@reserved |@END_OF_RAM
  38  * ... |<------------------- pram ------------------->|
  39  * ... ------------------------------------------------
  40  * @END_OF_RAM: denotes the RAM size
  41  * @pnvramaddr: Startadress of pseudo non volatile RAM in hex
  42  * @pram      : preserved ram size in k
  43  * @varaddr   : startadress for /var mounted into RAM
  44  */
  45 int set_km_env(void)
  46 {
  47         uchar buf[32];
  48         unsigned int pnvramaddr;
  49         unsigned int pram;
  50         unsigned int varaddr;
  51         unsigned int kernelmem;
  52         char *p;
  53         unsigned long rootfssize = 0;
  54
  55         pnvramaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM
  56                         - CONFIG_KM_PNVRAM;
  57         sprintf((char *)buf, "0x%x", pnvramaddr);
  58         setenv("pnvramaddr", (char *)buf);
  59
  60         /* try to read rootfssize (ram image) from envrionment */
  61         p = getenv("rootfssize");
  62         if (p != NULL)
  63                 strict_strtoul(p, 16, &rootfssize);
  64         pram = (rootfssize + CONFIG_KM_RESERVED_PRAM + CONFIG_KM_PHRAM +
  65                 CONFIG_KM_PNVRAM) / 0x400;
  66         sprintf((char *)buf, "0x%x", pram);
  67         setenv("pram", (char *)buf);
  68
  69         varaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM;
  70         sprintf((char *)buf, "0x%x", varaddr);
  71         setenv("varaddr", (char *)buf);
  72
  73         kernelmem = gd->ram_size - 0x400 * pram;
  74         sprintf((char *)buf, "0x%x", kernelmem);
  75         setenv("kernelmem", (char *)buf);
  76
  77         return 0;
  78 }
  79
  80 #if defined(CONFIG_SYS_I2C_INIT_BOARD)
  81 #if !defined(CONFIG_MPC83xx)
  82 static void i2c_write_start_seq(void)
  83 {
  84         set_sda(1);
  85         udelay(DELAY_HALF_PERIOD);
  86         set_scl(1);
  87         udelay(DELAY_HALF_PERIOD);
  88         set_sda(0);
  89         udelay(DELAY_HALF_PERIOD);
  90         set_scl(0);
  91         udelay(DELAY_HALF_PERIOD);
  92 }
  93
  94 /*
  95  * I2C is a synchronous protocol and resets of the processor in the middle
  96  * of an access can block the I2C Bus until a powerdown of the full unit is
  97  * done. This function toggles the SCL until the SCL and SCA line are
  98  * released, but max. 16 times, after this a I2C start-sequence is sent.
  99  * This I2C Deblocking mechanism was developed by Keymile in association
 100  * with Anatech and Atmel in 1998.
 101  */
 102 int i2c_make_abort(void)
 103 {
 104
 105 #if defined(CONFIG_HARD_I2C) && !defined(MACH_TYPE_KM_KIRKWOOD)
 106         immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
 107         i2c8260_t *i2c  = (i2c8260_t *)&immap->im_i2c;
 108
 109         /*
 110          * disable I2C controller first, otherwhise it thinks we want to
 111          * talk to the slave port...
 112          */
 113         clrbits_8(&i2c->i2c_i2mod, 0x01);
 114
 115         /* Set the PortPins to GPIO */
 116         setports(1);
 117 #endif
 118
 119         int     scl_state = 0;
 120         int     sda_state = 0;
 121         int     i = 0;
 122         int     ret = 0;
 123
 124         if (!get_sda()) {
 125                 ret = -1;
 126                 while (i < 16) {
 127                         i++;
 128                         set_scl(0);
 129                         udelay(DELAY_ABORT_SEQ);
 130                         set_scl(1);
 131                         udelay(DELAY_ABORT_SEQ);
 132                         scl_state = get_scl();
 133                         sda_state = get_sda();
 134                         if (scl_state && sda_state) {
 135                                 ret = 0;
 136                                 break;
 137                         }
 138                 }
 139         }
 140         if (ret == 0)
 141                 for (i = 0; i < 5; i++)
 142                         i2c_write_start_seq();
 143
 144         /* respect stop setup time */
 145         udelay(DELAY_ABORT_SEQ);
 146         set_scl(1);
 147         udelay(DELAY_ABORT_SEQ);
 148         set_sda(1);
 149         get_sda();
 150
 151 #if defined(CONFIG_HARD_I2C)
 152         /* Set the PortPins back to use for I2C */
 153         setports(0);
 154 #endif
 155         return ret;
 156 }
 157 #endif
 158
 159 /**
 160  * i2c_init_board - reset i2c bus. When the board is powercycled during a
 161  * bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
 162  */
 163 void i2c_init_board(void)
 164 {
 165         /* Now run the AbortSequence() */
 166         i2c_make_abort();
 167 }
 168 #endif
 169
 170 int board_eth_init(bd_t *bis)
 171 {
 172         if (ethernet_present())
 173                 return cpu_eth_init(bis);
 174
 175         return -1;
 176 }
 177
 178 /*
 179  * do_setboardid command
 180  * read out the board id and the hw key from the intventory EEPROM and set
 181  * this values as environment variables.
 182  */
 183 static int do_setboardid(cmd_tbl_t *cmdtp, int flag, int argc,
 184                                 char *const argv[])
 185 {
 186         unsigned char buf[32];
 187         char *p;
 188
 189         p = get_local_var("IVM_BoardId");
 190         if (p == NULL) {
 191                 printf("can't get the IVM_Boardid\n");
 192                 return 1;
 193         }
 194         sprintf((char *)buf, "%s", p);
 195         setenv("boardid", (char *)buf);
 196         printf("set boardid=%s\n", buf);
 197
 198         p = get_local_var("IVM_HWKey");
 199         if (p == NULL) {
 200                 printf("can't get the IVM_HWKey\n");
 201                 return 1;
 202         }
 203         sprintf((char *)buf, "%s", p);
 204         setenv("hwkey", (char *)buf);
 205         printf("set hwkey=%s\n", buf);
 206         printf("Execute manually saveenv for persistent storage.\n");
 207
 208         return 0;
 209 }
 210
 211 U_BOOT_CMD(km_setboardid, 1, 0, do_setboardid, "setboardid", "read out bid and "
 212                                  "hwkey from IVM and set in environment");
 213
 214 /*
 215  * command km_checkbidhwk
 216  *      if "boardid" and "hwkey" are not already set in the environment, do:
 217  *              if a "boardIdListHex" exists in the environment:
 218  *                      - read ivm data for boardid and hwkey
 219  *                      - compare each entry of the boardIdListHex with the
 220  *                              IVM data:
 221  *                      if match:
 222  *                              set environment variables boardid, boardId,
 223  *                              hwkey, hwKey to the found values
 224  *                              both (boardid and boardId) are set because
 225  *                              they might be used differently in the
 226  *                              application and in the init scripts (?)
 227  *      return 0 in case of match, 1 if not match or error
 228  */
 229 int do_checkboardidhwk(cmd_tbl_t *cmdtp, int flag, int argc,
 230                         char *const argv[])
 231 {
 232         unsigned long ivmbid = 0, ivmhwkey = 0;
 233         unsigned long envbid = 0, envhwkey = 0;
 234         char *p;
 235         int verbose = argc > 1 && *argv[1] == 'v';
 236         int rc = 0;
 237
 238         /*
 239          * first read out the real inventory values, these values are
 240          * already stored in the local hush variables
 241          */
 242         p = get_local_var("IVM_BoardId");
 243         if (p == NULL) {
 244                 printf("can't get the IVM_Boardid\n");
 245                 return 1;
 246         }
 247         rc = strict_strtoul(p, 16, &ivmbid);
 248
 249         p = get_local_var("IVM_HWKey");
 250         if (p == NULL) {
 251                 printf("can't get the IVM_HWKey\n");
 252                 return 1;
 253         }
 254         rc = strict_strtoul(p, 16, &ivmhwkey);
 255
 256         if (!ivmbid || !ivmhwkey) {
 257                 printf("Error: IVM_BoardId and/or IVM_HWKey not set!\n");
 258                 return rc;
 259         }
 260
 261         /* now try to read values from environment if available */
 262         p = getenv("boardid");
 263         if (p != NULL)
 264                 rc = strict_strtoul(p, 16, &envbid);
 265         p = getenv("hwkey");
 266         if (p != NULL)
 267                 rc = strict_strtoul(p, 16, &envhwkey);
 268
 269         if (rc != 0) {
 270                 printf("strict_strtoul returns error: %d", rc);
 271                 return rc;
 272         }
 273
 274         if (!envbid || !envhwkey) {
 275                 /*
 276                  * BoardId/HWkey not available in the environment, so try the
 277                  * environment variable for BoardId/HWkey list
 278                  */
 279                 char *bidhwklist = getenv("boardIdListHex");
 280
 281                 if (bidhwklist) {
 282                         int found = 0;
 283                         char *rest = bidhwklist;
 284                         char *endp;
 285
 286                         if (verbose) {
 287                                 printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n",
 288                                         ivmbid, ivmhwkey);
 289                                 printf("boardIdHwKeyList: %s\n",
 290                                         bidhwklist);
 291                         }
 292                         while (!found) {
 293                                 /* loop over each bid/hwkey pair in the list */
 294                                 unsigned long bid   = 0;
 295                                 unsigned long hwkey = 0;
 296
 297                                 while (*rest && !isxdigit(*rest))
 298                                         rest++;
 299                                 /*
 300                                  * use simple_strtoul because we need &end and
 301                                  * we know we got non numeric char at the end
 302                                  */
 303                                 bid = simple_strtoul(rest, &endp, 16);
 304                                 /* BoardId and HWkey are separated with a "_" */
 305                                 if (*endp == '_') {
 306                                         rest  = endp + 1;
 307                                         /*
 308                                          * use simple_strtoul because we need
 309                                          * &end
 310                                          */
 311                                         hwkey = simple_strtoul(rest, &endp, 16);
 312                                         rest  = endp;
 313                                         while (*rest && !isxdigit(*rest))
 314                                                 rest++;
 315                                 }
 316                                 if ((!bid) || (!hwkey)) {
 317                                         /* end of list */
 318                                         break;
 319                                 }
 320                                 if (verbose) {
 321                                         printf("trying bid=0x%lX, hwkey=%ld\n",
 322                                                 bid, hwkey);
 323                                 }
 324                                 /*
 325                                  * Compare the values of the found entry in the
 326                                  * list with the valid values which are stored
 327                                  * in the inventory eeprom. If they are equal
 328                                  * set the values in environment variables.
 329                                  */
 330                                 if ((bid == ivmbid) && (hwkey == ivmhwkey)) {
 331                                         char buf[10];
 332
 333                                         found = 1;
 334                                         envbid   = bid;
 335                                         envhwkey = hwkey;
 336                                         sprintf(buf, "%lx", bid);
 337                                         setenv("boardid", buf);
 338                                         sprintf(buf, "%lx", hwkey);
 339                                         setenv("hwkey", buf);
 340                                 }
 341                         } /* end while( ! found ) */
 342                 }
 343         }
 344
 345         /* compare now the values */
 346         if ((ivmbid == envbid) && (ivmhwkey == envhwkey)) {
 347                 printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey);
 348                 rc = 0; /* match */
 349         } else {
 350                 printf("Error: env boardid=0x%3lX, hwkey=%ld\n", envbid,
 351                         envhwkey);
 352                 printf("       IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey);
 353                 rc = 1; /* don't match */
 354         }
 355         return rc;
 356 }
 357
 358 U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk,
 359                 "check boardid and hwkey",
 360                 "[v]\n  - check environment parameter "\
 361                 "\"boardIdListHex\" against stored boardid and hwkey "\
 362                 "from the IVM\n    v: verbose output"
 363 );
 364
 365 /*
 366  * command km_checktestboot
 367  *  if the testpin of the board is asserted, return 1
 368  *  *   else return 0
 369  */
 370 int do_checktestboot(cmd_tbl_t *cmdtp, int flag, int argc,
 371                         char *const argv[])
 372 {
 373         int testpin = 0;
 374         char *s = NULL;
 375         int testboot = 0;
 376         int verbose = argc > 1 && *argv[1] == 'v';
 377
 378 #if defined(CONFIG_POST)
 379         testpin = post_hotkeys_pressed();
 380         s = getenv("test_bank");
 381 #endif
 382         /* when test_bank is not set, act as if testpin is not asserted */
 383         testboot = (testpin != 0) && (s);
 384         if (verbose) {
 385                 printf("testpin   = %d\n", testpin);
 386                 printf("test_bank = %s\n", s ? s : "not set");
 387                 printf("boot test app : %s\n", (testboot) ? "yes" : "no");
 388         }
 389         /* return 0 means: testboot, therefore we need the inversion */
 390         return !testboot;
 391 }
 392
 393 U_BOOT_CMD(km_checktestboot, 2, 0, do_checktestboot,
 394                 "check if testpin is asserted",
 395                 "[v]\n  v - verbose output"
 396 );