board/eltec/elppc/elppc.c

   1 /*
   2  * (C) Copyright 2002 ELTEC Elektronik AG
   3  * Frank Gottschling <fgottschling@eltec.de>
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <command.h>
  26 #include <mpc106.h>
  27 #include <video_fb.h>
  28
  29 DECLARE_GLOBAL_DATA_PTR;
  30
  31 /* ------------------------------------------------------------------------- */
  32
  33 int checkboard (void)
  34 {
  35         puts ("Board: ELTEC PowerPC\n");
  36         return (0);
  37 }
  38
  39 /* ------------------------------------------------------------------------- */
  40
  41 int checkflash (void)
  42 {
  43         /* TODO */
  44         printf ("Test not implemented !\n");
  45         return (0);
  46 }
  47
  48 /* ------------------------------------------------------------------------- */
  49
  50 static unsigned int mpc106_read_cfg_dword (unsigned int reg)
  51 {
  52         unsigned int reg_addr = MPC106_REG | (reg & 0xFFFFFFFC);
  53
  54         out32r (MPC106_REG_ADDR, reg_addr);
  55
  56         return (in32r (MPC106_REG_DATA | (reg & 0x3)));
  57 }
  58
  59 /* ------------------------------------------------------------------------- */
  60
  61 long int dram_size (int board_type)
  62 {
  63         /*
  64          * No actual initialisation to do - done when setting up
  65          * PICRs MCCRs ME/SARs etc in asm_init.S.
  66          */
  67
  68         register unsigned long i, msar1, mear1, memSize;
  69
  70 #if defined(CFG_MEMTEST)
  71         register unsigned long reg;
  72
  73         printf ("Testing DRAM\n");
  74
  75         /* write each mem addr with it's address */
  76         for (reg = CFG_MEMTEST_START; reg < CFG_MEMTEST_END; reg += 4)
  77                 *reg = reg;
  78
  79         for (reg = CFG_MEMTEST_START; reg < CFG_MEMTEST_END; reg += 4) {
  80                 if (*reg != reg)
  81                         return -1;
  82         }
  83 #endif
  84
  85         /*
  86          * Since MPC107 memory controller chip has already been set to
  87          * control all memory, just read and interpret its memory boundery register.
  88          */
  89         memSize = 0;
  90         msar1 = mpc106_read_cfg_dword (MPC106_MSAR1);
  91         mear1 = mpc106_read_cfg_dword (MPC106_MEAR1);
  92         i = mpc106_read_cfg_dword (MPC106_MBER) & 0xf;
  93
  94         do {
  95                 if (i & 0x01)                   /* is bank enabled ? */
  96                         memSize += (mear1 & 0xff) - (msar1 & 0xff) + 1;
  97                 msar1 >>= 8;
  98                 mear1 >>= 8;
  99                 i >>= 1;
 100         } while (i);
 101
 102         return (memSize * 0x100000);
 103 }
 104
 105 /* ------------------------------------------------------------------------- */
 106
 107 phys_size_t initdram (int board_type)
 108 {
 109         return dram_size (board_type);
 110 }
 111
 112 /* ------------------------------------------------------------------------- */
 113
 114 /*
 115  * The BAB 911 can be reset by writing bit 0 of the Processor Initialization
 116  * Register PI in the MPC 107 (at offset 0x41090 of the Embedded Utilities
 117  * Memory Block).
 118  */
 119 int do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 120 {
 121         out8 (MPC107_EUMB_PI, 1);
 122         return (0);
 123 }
 124
 125 /* ------------------------------------------------------------------------- */
 126
 127 #if defined(CONFIG_WATCHDOG)
 128
 129 /*
 130  * Since the 7xx CPUs don't have an internal watchdog, this function is
 131  * board specific.
 132  */
 133 void watchdog_reset (void)
 134 {
 135 }
 136 #endif                                                  /* CONFIG_WATCHDOG */
 137
 138 /* ------------------------------------------------------------------------- */
 139
 140 void after_reloc (ulong dest_addr)
 141 {
 142         /*
 143          * Jump to the main U-Boot board init code
 144          */
 145         board_init_r ((gd_t *)gd, dest_addr);
 146 }
 147
 148 /* ------------------------------------------------------------------------- */
 149
 150 #ifdef CONFIG_CONSOLE_EXTRA_INFO
 151 extern GraphicDevice smi;
 152
 153 void video_get_info_str (int line_number, char *info)
 154 {
 155         /* init video info strings for graphic console */
 156         switch (line_number) {
 157         case 1:
 158                 sprintf (info, " MPC7xx V%d.%d at %d / %d MHz",
 159                                  (get_pvr () >> 8) & 0xFF, get_pvr () & 0xFF, 400, 100);
 160                 return;
 161         case 2:
 162                 sprintf (info, " ELTEC ELPPC with %ld MB DRAM and %ld MB FLASH",
 163                                  dram_size (0) / 0x100000, flash_init () / 0x100000);
 164                 return;
 165         case 3:
 166                 sprintf (info, " %s", smi.modeIdent);
 167                 return;
 168         }
 169
 170         /* no more info lines */
 171         *info = 0;
 172         return;
 173 }
 174 #endif