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  * 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 );