board/motionpro/motionpro.c

   1 /*
   2  * (C) Copyright 2003-2007
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * modified for Promess PRO - by Andy Joseph, andy@promessdev.com
   6  * modified for Promess PRO-Motion - by Robert McCullough, rob@promessdev.com
   7  * modified by Chris M. Tumas 6/20/06 Change CAS latency to 2 from 3
   8  * Also changed the refresh for 100Mhz operation
   9  *
  10  * See file CREDITS for list of people who contributed to this
  11  * project.
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License as
  15  * published by the Free Software Foundation; either version 2 of
  16  * the License, or (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  26  * MA 02111-1307 USA
  27  */
  28
  29 #include <common.h>
  30 #include <mpc5xxx.h>
  31
  32
  33 /* Kollmorgen DPR initialization data */
  34 struct init_elem {
  35         unsigned long addr;
  36         unsigned len;
  37         char *data;
  38         } init_seq[] = {
  39                 {0x500003F2, 2, "\x86\x00"},            /* HW parameter */
  40                 {0x500003F0, 2, "\x00\x00"},
  41                 {0x500003EC, 4, "\x00\x80\xc1\x52"},    /* Magic word */
  42         };
  43
  44 /*
  45  * Initialize Kollmorgen DPR
  46  */
  47 static void kollmorgen_init(void)
  48 {
  49         unsigned i, j;
  50         vu_char *p;
  51
  52         for (i = 0; i < sizeof(init_seq) / sizeof(struct init_elem); ++i) {
  53                 p = (vu_char *)init_seq[i].addr;
  54                 for (j = 0; j < init_seq[i].len; ++j)
  55                         *(p + j) = *(init_seq[i].data + j);
  56         }
  57
  58         printf("DPR:   Kollmorgen DPR initialized\n");
  59 }
  60
  61
  62 /*
  63  * Early board initalization.
  64  */
  65 int board_early_init_r(void)
  66 {
  67         /* Now, when we are in RAM, disable Boot Chipselect and enable CS0 */
  68         *(vu_long *)MPC5XXX_ADDECR &= ~(1 << 25);
  69         *(vu_long *)MPC5XXX_ADDECR |= (1 << 16);
  70
  71         /* Initialize Kollmorgen DPR */
  72         kollmorgen_init();
  73
  74         return 0;
  75 }
  76
  77
  78 #ifndef CFG_RAMBOOT
  79 /*
  80  * Helper function to initialize SDRAM controller.
  81  */
  82 static void sdram_start (int hi_addr)
  83 {
  84         long hi_addr_bit = hi_addr ? 0x01000000 : 0;
  85
  86         /* unlock mode register */
  87         *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000000 |
  88                                                 hi_addr_bit;
  89
  90         /* precharge all banks */
  91         *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000002 |
  92                                                 hi_addr_bit;
  93
  94         /* auto refresh */
  95         *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000004 |
  96                                                 hi_addr_bit;
  97
  98         /* auto refresh, second time */
  99         *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000004 |
 100                                                 hi_addr_bit;
 101
 102         /* set mode register */
 103         *(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_MODE;
 104
 105         /* normal operation */
 106         *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | hi_addr_bit;
 107 }
 108 #endif /* !CFG_RAMBOOT */
 109
 110
 111 /*
 112  * Initalize SDRAM - configure SDRAM controller, detect memory size.
 113  */
 114 long int initdram (int board_type)
 115 {
 116         ulong dramsize = 0;
 117 #ifndef CFG_RAMBOOT
 118         ulong test1, test2;
 119
 120         /* configure SDRAM start/end for detection */
 121         *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x0000001e; /* 2G at 0x0 */
 122         *(vu_long *)MPC5XXX_SDRAM_CS1CFG = 0x80000000; /* disabled */
 123
 124         /* setup config registers */
 125         *(vu_long *)MPC5XXX_SDRAM_CONFIG1 = SDRAM_CONFIG1;
 126         *(vu_long *)MPC5XXX_SDRAM_CONFIG2 = SDRAM_CONFIG2;
 127
 128         sdram_start(0);
 129         test1 = get_ram_size((long *)CFG_SDRAM_BASE, 0x80000000);
 130         sdram_start(1);
 131         test2 = get_ram_size((long *)CFG_SDRAM_BASE, 0x80000000);
 132         if (test1 > test2) {
 133                 sdram_start(0);
 134                 dramsize = test1;
 135         } else {
 136                 dramsize = test2;
 137         }
 138
 139         /* memory smaller than 1MB is impossible */
 140         if (dramsize < (1 << 20))
 141                 dramsize = 0;
 142
 143         /* set SDRAM CS0 size according to the amount of RAM found */
 144         if (dramsize > 0)
 145                 *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x13 +
 146                         __builtin_ffs(dramsize >> 20) - 1;
 147         else
 148                 *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0; /* disabled */
 149
 150         /* let SDRAM CS1 start right after CS0 and disable it */
 151         *(vu_long *) MPC5XXX_SDRAM_CS1CFG = dramsize;
 152
 153 #else /* !CFG_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 /* CFG_RAMBOOT */
 161
 162         /* return total ram size */
 163         return dramsize;
 164 }
 165
 166
 167 int checkboard (void)
 168 {
 169         puts("Board: Promess Motion-PRO board\n");
 170         return 0;
 171 }