lib_blackfin/board.c

   1 /*
   2  * U-boot - board.c First C file to be called contains init routines
   3  *
   4  * Copyright (c) 2005 blackfin.uclinux.org
   5  *
   6  * (C) Copyright 2000-2004
   7  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   8  *
   9  * See file CREDITS for list of people who contributed to this
  10  * project.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  */
  27
  28 #include <common.h>
  29 #include <command.h>
  30 #include <malloc.h>
  31 #include <devices.h>
  32 #include <version.h>
  33 #include <net.h>
  34 #include <environment.h>
  35 #include "blackfin_board.h"
  36 #include "../drivers/smc91111.h"
  37
  38 DECLARE_GLOBAL_DATA_PTR;
  39
  40 extern flash_info_t flash_info[];
  41
  42
  43 static void mem_malloc_init(void)
  44 {
  45         mem_malloc_start = CFG_MALLOC_BASE;
  46         mem_malloc_end = (CFG_MALLOC_BASE + CFG_MALLOC_LEN);
  47         mem_malloc_brk = mem_malloc_start;
  48         memset((void *) mem_malloc_start, 0,
  49         mem_malloc_end - mem_malloc_start);
  50 }
  51
  52 void *sbrk(ptrdiff_t increment)
  53 {
  54         ulong old = mem_malloc_brk;
  55         ulong new = old + increment;
  56
  57         if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
  58                 return (NULL);
  59         }
  60         mem_malloc_brk = new;
  61
  62         return ((void *) old);
  63 }
  64
  65 static int display_banner(void)
  66 {
  67         sprintf(version_string, VERSION_STRING_FORMAT, VERSION_STRING);
  68         printf("%s\n", version_string);
  69         return (0);
  70 }
  71
  72 static void display_flash_config(ulong size)
  73 {
  74         puts("FLASH:  ");
  75         print_size(size, "\n");
  76         return;
  77 }
  78
  79 static int init_baudrate(void)
  80 {
  81         uchar tmp[64];
  82         int i = getenv_r("baudrate", tmp, sizeof(tmp));
  83         gd->bd->bi_baudrate = gd->baudrate = (i > 0)
  84                 ? (int) simple_strtoul(tmp, NULL, 10)
  85                 : CONFIG_BAUDRATE;
  86         return (0);
  87 }
  88
  89 #ifdef DEBUG
  90 static void display_global_data(void)
  91 {
  92         bd_t *bd;
  93         bd = gd->bd;
  94         printf("--flags:%x\n", gd->flags);
  95         printf("--board_type:%x\n", gd->board_type);
  96         printf("--baudrate:%x\n", gd->baudrate);
  97         printf("--have_console:%x\n", gd->have_console);
  98         printf("--ram_size:%x\n", gd->ram_size);
  99         printf("--reloc_off:%x\n", gd->reloc_off);
 100         printf("--env_addr:%x\n", gd->env_addr);
 101         printf("--env_valid:%x\n", gd->env_valid);
 102         printf("--bd:%x %x\n", gd->bd, bd);
 103         printf("---bi_baudrate:%x\n", bd->bi_baudrate);
 104         printf("---bi_ip_addr:%x\n", bd->bi_ip_addr);
 105         printf("---bi_enetaddr:%x %x %x %x %x %x\n",
 106                                 bd->bi_enetaddr[0],
 107                                 bd->bi_enetaddr[1],
 108                                 bd->bi_enetaddr[2],
 109                                 bd->bi_enetaddr[3],
 110                                 bd->bi_enetaddr[4],
 111                                 bd->bi_enetaddr[5]);
 112         printf("---bi_arch_number:%x\n", bd->bi_arch_number);
 113         printf("---bi_boot_params:%x\n", bd->bi_boot_params);
 114         printf("---bi_memstart:%x\n", bd->bi_memstart);
 115         printf("---bi_memsize:%x\n", bd->bi_memsize);
 116         printf("---bi_flashstart:%x\n", bd->bi_flashstart);
 117         printf("---bi_flashsize:%x\n", bd->bi_flashsize);
 118         printf("---bi_flashoffset:%x\n", bd->bi_flashoffset);
 119         printf("--jt:%x *:%x\n", gd->jt, *(gd->jt));
 120 }
 121 #endif
 122
 123 /*
 124  * All attempts to come up with a "common" initialization sequence
 125  * that works for all boards and architectures failed: some of the
 126  * requirements are just _too_ different. To get rid of the resulting
 127  * mess of board dependend #ifdef'ed code we now make the whole
 128  * initialization sequence configurable to the user.
 129  *
 130  * The requirements for any new initalization function is simple: it
 131  * receives a pointer to the "global data" structure as it's only
 132  * argument, and returns an integer return code, where 0 means
 133  * "continue" and != 0 means "fatal error, hang the system".
 134  */
 135
 136 void board_init_f(ulong bootflag)
 137 {
 138         ulong addr;
 139         bd_t *bd;
 140
 141         gd = (gd_t *) (CFG_GBL_DATA_ADDR);
 142         memset((void *) gd, 0, sizeof(gd_t));
 143
 144         /* Board data initialization */
 145         addr = (CFG_GBL_DATA_ADDR + sizeof(gd_t));
 146
 147         /* Align to 4 byte boundary */
 148         addr &= ~(4 - 1);
 149         bd = (bd_t*)addr;
 150         gd->bd = bd;
 151         memset((void *) bd, 0, sizeof(bd_t));
 152
 153         /* Initialize */
 154         init_IRQ();
 155         env_init();             /* initialize environment */
 156         init_baudrate();        /* initialze baudrate settings */
 157         serial_init();          /* serial communications setup */
 158         console_init_f();
 159         display_banner();       /* say that we are here */
 160         checkboard();
 161 #if defined(CONFIG_RTC_BF533) && (CONFIG_COMMANDS & CFG_CMD_DATE)
 162         rtc_init();
 163 #endif
 164         timer_init();
 165         printf("Clock: VCO: %lu MHz, Core: %lu MHz, System: %lu MHz\n", \
 166         CONFIG_VCO_HZ/1000000, CONFIG_CCLK_HZ/1000000, CONFIG_SCLK_HZ/1000000);
 167         printf("SDRAM: ");
 168         print_size(initdram(0), "\n");
 169         board_init_r((gd_t *) gd, 0x20000010);
 170 }
 171
 172 void board_init_r(gd_t * id, ulong dest_addr)
 173 {
 174         ulong size;
 175         extern void malloc_bin_reloc(void);
 176         char *s, *e;
 177         bd_t *bd;
 178         int i;
 179         gd = id;
 180         gd->flags |= GD_FLG_RELOC;      /* tell others: relocation done */
 181         bd = gd->bd;
 182
 183 #if     CONFIG_STAMP
 184         /* There are some other pointer constants we must deal with */
 185         /* configure available FLASH banks */
 186         size = flash_init();
 187         display_flash_config(size);
 188         flash_protect(FLAG_PROTECT_SET, CFG_FLASH_BASE, CFG_FLASH_BASE + 0x1ffff, &flash_info[0]);
 189         bd->bi_flashstart = CFG_FLASH_BASE;
 190         bd->bi_flashsize = size;
 191         bd->bi_flashoffset = 0;
 192 #else
 193         bd->bi_flashstart = 0;
 194         bd->bi_flashsize = 0;
 195         bd->bi_flashoffset = 0;
 196 #endif
 197         /* initialize malloc() area */
 198         mem_malloc_init();
 199         malloc_bin_reloc();
 200
 201         /* relocate environment function pointers etc. */
 202         env_relocate();
 203
 204         /* board MAC address */
 205         s = getenv("ethaddr");
 206         for (i = 0; i < 6; ++i) {
 207                 bd->bi_enetaddr[i] = s ? simple_strtoul(s, &e, 16) : 0;
 208                 if (s)
 209                         s = (*e) ? e + 1 : e;
 210         }
 211
 212         /* IP Address */
 213         bd->bi_ip_addr = getenv_IPaddr("ipaddr");
 214
 215         /* Initialize devices */
 216         devices_init();
 217         jumptable_init();
 218
 219         /* Initialize the console (after the relocation and devices init) */
 220         console_init_r();
 221
 222         /* Initialize from environment */
 223         if ((s = getenv("loadaddr")) != NULL) {
 224                 load_addr = simple_strtoul(s, NULL, 16);
 225         }
 226 #if (CONFIG_COMMANDS & CFG_CMD_NET)
 227         if ((s = getenv("bootfile")) != NULL) {
 228                 copy_filename(BootFile, s, sizeof(BootFile));
 229         }
 230 #endif
 231 #if defined(CONFIG_MISC_INIT_R)
 232         /* miscellaneous platform dependent initialisations */
 233         misc_init_r();
 234 #endif
 235
 236 #ifdef CONFIG_DRIVER_SMC91111
 237 #ifdef SHARED_RESOURCES
 238         /* Switch to Ethernet */
 239         swap_to(ETHERNET);
 240 #endif
 241         if  ( (SMC_inw(BANK_SELECT) & UPPER_BYTE_MASK) != SMC_IDENT ) {
 242                 printf("ERROR: Can't find SMC91111 at address %x\n", SMC_BASE_ADDRESS);
 243         } else {
 244                 printf("Net:   SMC91111 at 0x%08X\n", SMC_BASE_ADDRESS);
 245         }
 246
 247 #ifdef SHARED_RESOURCES
 248         swap_to(FLASH);
 249 #endif
 250 #endif
 251 #ifdef CONFIG_SOFT_I2C
 252         init_func_i2c();
 253 #endif
 254
 255 #ifdef DEBUG
 256         display_global_data(void);
 257 #endif
 258
 259         /* main_loop() can return to retry autoboot, if so just run it again. */
 260         for (;;) {
 261                 main_loop();
 262         }
 263 }
 264
 265 #ifdef CONFIG_SOFT_I2C
 266 static int init_func_i2c (void)
 267 {
 268         puts ("I2C:   ");
 269         i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
 270         puts ("ready\n");
 271         return (0);
 272 }
 273 #endif
 274
 275 void hang(void)
 276 {
 277         puts("### ERROR ### Please RESET the board ###\n");
 278         for (;;);
 279 }