board/cm5200/cm5200.c

   1 /*
   2  * (C) Copyright 2003-2007
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * (C) Copyright 2004
   6  * Mark Jonas, Freescale Semiconductor, mark.jonas@motorola.com.
   7  *
   8  * (C) Copyright 2004-2005
   9  * Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de
  10  *
  11  * Adapted to U-Boot 1.2 by:
  12  *   Bartlomiej Sieka <tur@semihalf.com>:
  13  *      - HW ID readout from EEPROM
  14  *      - module detection
  15  *   Grzegorz Bernacki <gjb@semihalf.com>:
  16  *      - run-time SDRAM controller configuration
  17  *      - LIBFDT support
  18  *
  19  * See file CREDITS for list of people who contributed to this
  20  * project.
  21  *
  22  * This program is free software; you can redistribute it and/or
  23  * modify it under the terms of the GNU General Public License as
  24  * published by the Free Software Foundation; either version 2 of
  25  * the License, or (at your option) any later version.
  26  *
  27  * This program is distributed in the hope that it will be useful,
  28  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  29  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  30  * GNU General Public License for more details.
  31  *
  32  * You should have received a copy of the GNU General Public License
  33  * along with this program; if not, write to the Free Software
  34  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  35  * MA 02111-1307 USA
  36  */
  37
  38 #include <common.h>
  39 #include <mpc5xxx.h>
  40 #include <pci.h>
  41 #include <asm/processor.h>
  42 #include <i2c.h>
  43 #include <linux/ctype.h>
  44
  45 #ifdef CONFIG_OF_LIBFDT
  46 #include <libfdt.h>
  47 #include <libfdt_env.h>
  48 #include <fdt_support.h>
  49 #endif /* CONFIG_OF_LIBFDT */
  50
  51
  52 #include "cm5200.h"
  53 #include "fwupdate.h"
  54
  55 DECLARE_GLOBAL_DATA_PTR;
  56
  57 static hw_id_t hw_id;
  58
  59
  60 #ifndef CONFIG_SYS_RAMBOOT
  61 /*
  62  * Helper function to initialize SDRAM controller.
  63  */
  64 static void sdram_start(int hi_addr, mem_conf_t *mem_conf)
  65 {
  66         long hi_addr_bit = hi_addr ? 0x01000000 : 0;
  67
  68         /* unlock mode register */
  69         *(vu_long *)MPC5XXX_SDRAM_CTRL = mem_conf->control | 0x80000000 |
  70                                                 hi_addr_bit;
  71
  72         /* precharge all banks */
  73         *(vu_long *)MPC5XXX_SDRAM_CTRL = mem_conf->control | 0x80000002 |
  74                                                 hi_addr_bit;
  75
  76         /* auto refresh */
  77         *(vu_long *)MPC5XXX_SDRAM_CTRL = mem_conf->control | 0x80000004 |
  78                                                 hi_addr_bit;
  79
  80         /* auto refresh, second time */
  81         *(vu_long *)MPC5XXX_SDRAM_CTRL = mem_conf->control | 0x80000004 |
  82                                                 hi_addr_bit;
  83
  84         /* set mode register */
  85         *(vu_long *)MPC5XXX_SDRAM_MODE = mem_conf->mode;
  86
  87         /* normal operation */
  88         *(vu_long *)MPC5XXX_SDRAM_CTRL = mem_conf->control | hi_addr_bit;
  89 }
  90 #endif /* CONFIG_SYS_RAMBOOT */
  91
  92
  93 /*
  94  * Retrieve memory configuration for a given module. board_type is the index
  95  * in hw_id_list[] corresponding to the module we are executing on; we return
  96  * SDRAM controller settings approprate for this module.
  97  */
  98 static mem_conf_t* get_mem_config(int board_type)
  99 {
 100         switch(board_type){
 101                 case CM1_QA:
 102                         return memory_config[0];
 103                 case CM11_QA:
 104                 case CMU1_QA:
 105                         return memory_config[1];
 106                 default:
 107                         printf("ERROR: Unknown module, using a default SDRAM "
 108                                 "configuration - things may not work!!!.\n");
 109                         return memory_config[0];
 110         }
 111 }
 112
 113
 114 /*
 115  * Initalize SDRAM - configure SDRAM controller, detect memory size.
 116  */
 117 phys_size_t initdram(int board_type)
 118 {
 119         ulong dramsize = 0;
 120 #ifndef CONFIG_SYS_RAMBOOT
 121         ulong test1, test2;
 122         mem_conf_t *mem_conf;
 123
 124         mem_conf = get_mem_config(board_type);
 125
 126         /* configure SDRAM start/end for detection */
 127         *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x0000001e; /* 2G at 0x0 */
 128
 129         /* setup config registers */
 130         *(vu_long *)MPC5XXX_SDRAM_CONFIG1 = mem_conf->config1;
 131         *(vu_long *)MPC5XXX_SDRAM_CONFIG2 = mem_conf->config2;
 132
 133         sdram_start(0, mem_conf);
 134         test1 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x80000000);
 135         sdram_start(1, mem_conf);
 136         test2 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x80000000);
 137         if (test1 > test2) {
 138                 sdram_start(0, mem_conf);
 139                 dramsize = test1;
 140         } else
 141                 dramsize = test2;
 142
 143         /* memory smaller than 1MB is impossible */
 144         if (dramsize < (1 << 20))
 145                 dramsize = 0;
 146
 147         /* set SDRAM CS0 size according to the amount of RAM found */
 148         if (dramsize > 0) {
 149                 *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x13 +
 150                         __builtin_ffs(dramsize >> 20) - 1;
 151         } else
 152                 *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0; /* disabled */
 153 #else /* CONFIG_SYS_RAMBOOT */
 154         /* retrieve size of memory connected to SDRAM CS0 */
 155         dramsize = *(vu_long *)MPC5XXX_SDRAM_CS0CFG & 0xFF;
 156         if (dramsize >= 0x13)
 157                 dramsize = (1 << (dramsize - 0x13)) << 20;
 158         else
 159                 dramsize = 0;
 160 #endif /* !CONFIG_SYS_RAMBOOT */
 161
 162         /*
 163          * On MPC5200B we need to set the special configuration delay in the
 164          * DDR controller.  Refer to chapter 8.7.5 SDelay--MBAR + 0x0190 of
 165          * the MPC5200B User's Manual.
 166          */
 167         *(vu_long *)MPC5XXX_SDRAM_SDELAY = 0x04;
 168         __asm__ volatile ("sync");
 169
 170         return dramsize;
 171 }
 172
 173
 174 /*
 175  * Read module hardware identification data from the I2C EEPROM.
 176  */
 177 static void read_hw_id(hw_id_t hw_id)
 178 {
 179         int i;
 180         for (i = 0; i < HW_ID_ELEM_COUNT; ++i)
 181                 if (i2c_read(CONFIG_SYS_I2C_EEPROM,
 182                                 hw_id_format[i].offset,
 183                                 2,
 184                                 (uchar *)&hw_id[i][0],
 185                                 hw_id_format[i].length) != 0)
 186                         printf("ERROR: can't read HW ID from EEPROM\n");
 187 }
 188
 189
 190 /*
 191  * Identify module we are running on, set gd->board_type to the index in
 192  * hw_id_list[] corresponding to the module identifed, or to
 193  * CM5200_UNKNOWN_MODULE if we can't identify the module.
 194  */
 195 static void identify_module(hw_id_t hw_id)
 196 {
 197         int i, j, element;
 198         char match;
 199         gd->board_type = CM5200_UNKNOWN_MODULE;
 200         for (i = 0; i < sizeof (hw_id_list) / sizeof (char **); ++i) {
 201                 match = 1;
 202                 for (j = 0; j < sizeof (hw_id_identify) / sizeof (int); ++j) {
 203                         element = hw_id_identify[j];
 204                         if (strncmp(hw_id_list[i][element],
 205                                         &hw_id[element][0],
 206                                         hw_id_format[element].length) != 0) {
 207                                 match = 0;
 208                                 break;
 209                         }
 210                 }
 211                 if (match) {
 212                         gd->board_type = i;
 213                         break;
 214                 }
 215         }
 216 }
 217
 218
 219 /*
 220  * Compose string with module name.
 221  * buf is assumed to have enough space, and be null-terminated.
 222  */
 223 static void compose_module_name(hw_id_t hw_id, char *buf)
 224 {
 225         char tmp[MODULE_NAME_MAXLEN];
 226         strncat(buf, &hw_id[PCB_NAME][0], hw_id_format[PCB_NAME].length);
 227         strncat(buf, ".", 1);
 228         strncat(buf, &hw_id[FORM][0], hw_id_format[FORM].length);
 229         strncat(buf, &hw_id[VERSION][0], hw_id_format[VERSION].length);
 230         strncat(buf, " (", 2);
 231         strncat(buf, &hw_id[IDENTIFICATION_NUMBER][0],
 232                 hw_id_format[IDENTIFICATION_NUMBER].length);
 233         sprintf(tmp, " / %u.%u)",
 234                 hw_id[MAJOR_SW_VERSION][0],
 235                 hw_id[MINOR_SW_VERSION][0]);
 236         strcat(buf, tmp);
 237 }
 238
 239
 240 /*
 241  * Compose string with hostname.
 242  * buf is assumed to have enough space, and be null-terminated.
 243  */
 244 static void compose_hostname(hw_id_t hw_id, char *buf)
 245 {
 246         char *p;
 247         strncat(buf, &hw_id[PCB_NAME][0], hw_id_format[PCB_NAME].length);
 248         strncat(buf, "_", 1);
 249         strncat(buf, &hw_id[FORM][0], hw_id_format[FORM].length);
 250         strncat(buf, &hw_id[VERSION][0], hw_id_format[VERSION].length);
 251         for (p = buf; *p; ++p)
 252                 *p = tolower(*p);
 253
 254 }
 255
 256
 257 #if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
 258 /*
 259  * Update 'model' and 'memory' properties in the blob according to the module
 260  * that we are running on.
 261  */
 262 static void ft_blob_update(void *blob, bd_t *bd)
 263 {
 264         int len, ret, nodeoffset = 0;
 265         char module_name[MODULE_NAME_MAXLEN] = {0};
 266
 267         compose_module_name(hw_id, module_name);
 268         len = strlen(module_name) + 1;
 269
 270         ret = fdt_setprop(blob, nodeoffset, "model", module_name, len);
 271         if (ret < 0)
 272         printf("ft_blob_update(): cannot set /model property err:%s\n",
 273                 fdt_strerror(ret));
 274 }
 275 #endif /* defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT) */
 276
 277
 278 /*
 279  * Read HW ID from I2C EEPROM and detect the modue we are running on. Note
 280  * that we need to use local variable for readout, because global data is not
 281  * writable yet (and we'll have to redo the readout later on).
 282  */
 283 int checkboard(void)
 284 {
 285         hw_id_t hw_id_tmp;
 286         char module_name_tmp[MODULE_NAME_MAXLEN] = "";
 287
 288         /*
 289          * We need I2C to access HW ID data from EEPROM, so we call i2c_init()
 290          * here despite the fact that it will be called again later on. We
 291          * also use a little trick to silence I2C-related output.
 292          */
 293         gd->flags |= GD_FLG_SILENT;
 294         i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 295         gd->flags &= ~GD_FLG_SILENT;
 296
 297         read_hw_id(hw_id_tmp);
 298         identify_module(hw_id_tmp);     /* this sets gd->board_type */
 299         compose_module_name(hw_id_tmp, module_name_tmp);
 300
 301         if (gd->board_type != CM5200_UNKNOWN_MODULE)
 302                 printf("Board: %s\n", module_name_tmp);
 303         else
 304                 printf("Board: unrecognized cm5200 module (%s)\n",
 305                         module_name_tmp);
 306
 307         return 0;
 308 }
 309
 310
 311 int board_early_init_r(void)
 312 {
 313         /*
 314          * Now, when we are in RAM, enable flash write access for detection
 315          * process. Note that CS_BOOT cannot be cleared when executing in
 316          * flash.
 317          */
 318         *(vu_long *)MPC5XXX_BOOTCS_CFG &= ~0x1; /* clear RO */
 319
 320         /* Now that we can write to global data, read HW ID again. */
 321         read_hw_id(hw_id);
 322         return 0;
 323 }
 324
 325
 326 #if defined(CONFIG_POST) || defined(CONFIG_LOGBUFFER)
 327 void post_word_store(ulong a)
 328 {
 329         vu_long *save_addr = (vu_long *)(MPC5XXX_SRAM + MPC5XXX_SRAM_POST_SIZE);
 330         *save_addr = a;
 331 }
 332
 333
 334 ulong post_word_load(void)
 335 {
 336         vu_long *save_addr = (vu_long *)(MPC5XXX_SRAM + MPC5XXX_SRAM_POST_SIZE);
 337         return *save_addr;
 338 }
 339 #endif /* CONFIG_POST || CONFIG_LOGBUFFER */
 340
 341
 342 #ifdef CONFIG_MISC_INIT_R
 343 int misc_init_r(void)
 344 {
 345 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
 346         uchar buf[6];
 347         char str[18];
 348         char hostname[MODULE_NAME_MAXLEN];
 349
 350         /* Read ethaddr from EEPROM */
 351         if (i2c_read(CONFIG_SYS_I2C_EEPROM, CONFIG_MAC_OFFSET, 2, buf, 6) == 0) {
 352                 sprintf(str, "%02X:%02X:%02X:%02X:%02X:%02X",
 353                         buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
 354                 /* Check if MAC addr is owned by Schindler */
 355                 if (strstr(str, "00:06:C3") != str)
 356                         printf(LOG_PREFIX "Warning - Illegal MAC address (%s)"
 357                                 " in EEPROM.\n", str);
 358                 else {
 359                         printf(LOG_PREFIX "Using MAC (%s) from I2C EEPROM\n",
 360                                 str);
 361                         setenv("ethaddr", str);
 362                 }
 363         } else {
 364                 printf(LOG_PREFIX "Warning - Unable to read MAC from I2C"
 365                         " device at address %02X:%04X\n", CONFIG_SYS_I2C_EEPROM,
 366                         CONFIG_MAC_OFFSET);
 367         }
 368 #endif /* defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C) */
 369         if (!getenv("ethaddr"))
 370                 printf(LOG_PREFIX "MAC address not set, networking is not "
 371                                         "operational\n");
 372
 373         /* set the hostname appropriate to the module we're running on */
 374         hostname[0] = 0x00;
 375         compose_hostname(hw_id, hostname);
 376         setenv("hostname", hostname);
 377
 378         return 0;
 379 }
 380 #endif /* CONFIG_MISC_INIT_R */
 381
 382
 383 #ifdef CONFIG_LAST_STAGE_INIT
 384 int last_stage_init(void)
 385 {
 386 #ifdef CONFIG_USB_STORAGE
 387         cm5200_fwupdate();
 388 #endif /* CONFIG_USB_STORAGE */
 389         return 0;
 390 }
 391 #endif /* CONFIG_LAST_STAGE_INIT */
 392
 393
 394 #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
 395 void ft_board_setup(void *blob, bd_t *bd)
 396 {
 397         ft_cpu_setup(blob, bd);
 398         ft_blob_update(blob, bd);
 399 }
 400 #endif /* defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP) */