board/hmi1001/hmi1001.c

   1 /*
   2  * (C) Copyright 2003-2004
   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
   9  * Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de
  10  *
  11  * See file CREDITS for list of people who contributed to this
  12  * project.
  13  *
  14  * This program is free software; you can redistribute it and/or
  15  * modify it under the terms of the GNU General Public License as
  16  * published by the Free Software Foundation; either version 2 of
  17  * the License, or (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  27  * MA 02111-1307 USA
  28  */
  29
  30 #include <common.h>
  31 #include <mpc5xxx.h>
  32 #include <pci.h>
  33 #include <malloc.h>
  34
  35 #ifndef CFG_RAMBOOT
  36 static void sdram_start (int hi_addr)
  37 {
  38         long hi_addr_bit = hi_addr ? 0x01000000 : 0;
  39
  40         /* unlock mode register */
  41         *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000000 | hi_addr_bit;
  42         __asm__ volatile ("sync");
  43
  44         /* precharge all banks */
  45         *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000002 | hi_addr_bit;
  46         __asm__ volatile ("sync");
  47
  48 #if SDRAM_DDR
  49         /* set mode register: extended mode */
  50         *(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_EMODE;
  51         __asm__ volatile ("sync");
  52
  53         /* set mode register: reset DLL */
  54         *(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_MODE | 0x04000000;
  55         __asm__ volatile ("sync");
  56 #endif
  57
  58         /* precharge all banks */
  59         *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000002 | hi_addr_bit;
  60         __asm__ volatile ("sync");
  61
  62         /* auto refresh */
  63         *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000004 | hi_addr_bit;
  64         __asm__ volatile ("sync");
  65
  66         /* set mode register */
  67         *(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_MODE;
  68         __asm__ volatile ("sync");
  69
  70         /* normal operation */
  71         *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | hi_addr_bit;
  72         __asm__ volatile ("sync");
  73 }
  74 #endif
  75
  76 /*
  77  * ATTENTION: Although partially referenced initdram does NOT make real use
  78  *            use of CFG_SDRAM_BASE. The code does not work if CFG_SDRAM_BASE
  79  *            is something else than 0x00000000.
  80  */
  81
  82 long int initdram (int board_type)
  83 {
  84         ulong dramsize = 0;
  85 #ifndef CFG_RAMBOOT
  86         ulong test1, test2;
  87
  88         /* setup SDRAM chip selects */
  89         *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x0000001c; /* 512MB at 0x0 */
  90         *(vu_long *)MPC5XXX_SDRAM_CS1CFG = 0x40000000; /* disabled */
  91         __asm__ volatile ("sync");
  92
  93         /* setup config registers */
  94         *(vu_long *)MPC5XXX_SDRAM_CONFIG1 = SDRAM_CONFIG1;
  95         *(vu_long *)MPC5XXX_SDRAM_CONFIG2 = SDRAM_CONFIG2;
  96         __asm__ volatile ("sync");
  97
  98 #if SDRAM_DDR
  99         /* set tap delay */
 100         *(vu_long *)MPC5XXX_CDM_PORCFG = SDRAM_TAPDELAY;
 101         __asm__ volatile ("sync");
 102 #endif
 103
 104         /* find RAM size using SDRAM CS0 only */
 105         sdram_start(0);
 106         test1 = get_ram_size((ulong *)CFG_SDRAM_BASE, 0x20000000);
 107         sdram_start(1);
 108         test2 = get_ram_size((ulong *)CFG_SDRAM_BASE, 0x20000000);
 109         if (test1 > test2) {
 110                 sdram_start(0);
 111                 dramsize = test1;
 112         } else {
 113                 dramsize = test2;
 114         }
 115
 116         /* memory smaller than 1MB is impossible */
 117         if (dramsize < (1 << 20)) {
 118                 dramsize = 0;
 119         }
 120
 121         /* set SDRAM CS0 size according to the amount of RAM found */
 122         if (dramsize > 0) {
 123                 *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x13 +
 124                         __builtin_ffs(dramsize >> 20) - 1;
 125         } else {
 126                 *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0; /* disabled */
 127         }
 128
 129         *(vu_long *)MPC5XXX_SDRAM_CS1CFG = dramsize; /* disabled */
 130 #else /* CFG_RAMBOOT */
 131
 132         /* retrieve size of memory connected to SDRAM CS0 */
 133         dramsize = *(vu_long *)MPC5XXX_SDRAM_CS0CFG & 0xFF;
 134         if (dramsize >= 0x13) {
 135                 dramsize = (1 << (dramsize - 0x13)) << 20;
 136         } else {
 137                 dramsize = 0;
 138         }
 139
 140         /* retrieve size of memory connected to SDRAM CS1 */
 141         dramsize2 = *(vu_long *)MPC5XXX_SDRAM_CS1CFG & 0xFF;
 142         if (dramsize2 >= 0x13) {
 143                 dramsize2 = (1 << (dramsize2 - 0x13)) << 20;
 144         } else {
 145                 dramsize2 = 0;
 146         }
 147
 148 #endif /* CFG_RAMBOOT */
 149
 150 /*      return dramsize + dramsize2; */
 151         return dramsize;
 152 }
 153
 154 int checkboard (void)
 155 {
 156         puts ("Board: HMI1001\n");
 157         return 0;
 158 }
 159
 160 #ifdef CONFIG_PREBOOT
 161
 162 static uchar kbd_magic_prefix[]         = "key_magic";
 163 static uchar kbd_command_prefix[]       = "key_cmd";
 164
 165 #define S1_ROT  0xf0
 166 #define S2_Q    0x40
 167 #define S2_M    0x20
 168
 169 struct kbd_data_t {
 170         char s1;
 171         char s2;
 172 };
 173
 174 struct kbd_data_t* get_keys (struct kbd_data_t *kbd_data)
 175 {
 176         kbd_data->s1 = *((volatile uchar*)(CFG_STATUS1_BASE));
 177         kbd_data->s2 = *((volatile uchar*)(CFG_STATUS2_BASE));
 178
 179         return kbd_data;
 180 }
 181
 182 static int compare_magic (const struct kbd_data_t *kbd_data, uchar *str)
 183 {
 184         char s1 = str[0];
 185         char s2;
 186
 187         if (s1 >= '0' && s1 <= '9')
 188                 s1 -= '0';
 189         else if (s1 >= 'a' && s1 <= 'f')
 190                 s1 = s1 - 'a' + 10;
 191         else if (s1 >= 'A' && s1 <= 'F')
 192                 s1 = s1 - 'A' + 10;
 193         else
 194                 return -1;
 195
 196         if (((S1_ROT & kbd_data->s1) >> 4) != s1)
 197                 return -1;
 198
 199         s2 = (S2_Q | S2_M) & kbd_data->s2;
 200
 201         switch (str[1]) {
 202         case 'q':
 203         case 'Q':
 204                 if (s2 == S2_Q)
 205                         return -1;
 206                 break;
 207         case 'm':
 208         case 'M':
 209                 if (s2 == S2_M)
 210                         return -1;
 211                 break;
 212         case '\0':
 213                 if (s2 == (S2_Q | S2_M))
 214                         return 0;
 215         default:
 216                 return -1;
 217         }
 218
 219         if (str[2])
 220                 return -1;
 221
 222         return 0;
 223 }
 224
 225 static uchar *key_match (const struct kbd_data_t *kbd_data)
 226 {
 227         uchar magic[sizeof (kbd_magic_prefix) + 1];
 228         uchar *suffix;
 229         uchar *kbd_magic_keys;
 230
 231         /*
 232          * The following string defines the characters that can be appended
 233          * to "key_magic" to form the names of environment variables that
 234          * hold "magic" key codes, i. e. such key codes that can cause
 235          * pre-boot actions. If the string is empty (""), then only
 236          * "key_magic" is checked (old behaviour); the string "125" causes
 237          * checks for "key_magic1", "key_magic2" and "key_magic5", etc.
 238          */
 239         if ((kbd_magic_keys = getenv ("magic_keys")) == NULL)
 240                 kbd_magic_keys = "";
 241
 242         /* loop over all magic keys;
 243          * use '\0' suffix in case of empty string
 244          */
 245         for (suffix = kbd_magic_keys; *suffix ||
 246                      suffix == kbd_magic_keys; ++suffix) {
 247                 sprintf (magic, "%s%c", kbd_magic_prefix, *suffix);
 248
 249                 if (compare_magic(kbd_data, getenv(magic)) == 0) {
 250                         uchar cmd_name[sizeof (kbd_command_prefix) + 1];
 251                         char *cmd;
 252
 253                         sprintf (cmd_name, "%s%c", kbd_command_prefix, *suffix);
 254                         cmd = getenv (cmd_name);
 255
 256                         return (cmd);
 257                 }
 258         }
 259
 260         return (NULL);
 261 }
 262
 263 #endif /* CONFIG_PREBOOT */
 264
 265 int misc_init_r (void)
 266 {
 267 #ifdef CONFIG_PREBOOT
 268         struct kbd_data_t kbd_data;
 269         /* Decode keys */
 270         uchar *str = strdup (key_match (get_keys (&kbd_data)));
 271         /* Set or delete definition */
 272         setenv ("preboot", str);
 273         free (str);
 274 #endif /* CONFIG_PREBOOT */
 275
 276         return 0;
 277 }
 278
 279 int board_early_init_r (void)
 280 {
 281         *(vu_long *)MPC5XXX_BOOTCS_CFG &= ~0x1; /* clear RO */
 282         *(vu_long *)MPC5XXX_BOOTCS_START =
 283         *(vu_long *)MPC5XXX_CS0_START = START_REG(CFG_FLASH_BASE);
 284         *(vu_long *)MPC5XXX_BOOTCS_STOP =
 285         *(vu_long *)MPC5XXX_CS0_STOP = STOP_REG(CFG_FLASH_BASE, CFG_FLASH_SIZE);
 286         return 0;
 287 }
 288 #ifdef  CONFIG_PCI
 289 static struct pci_controller hose;
 290
 291 extern void pci_mpc5xxx_init(struct pci_controller *);
 292
 293 void pci_init_board(void)
 294 {
 295         pci_mpc5xxx_init(&hose);
 296 }
 297 #endif