board/a3000/a3000.c

   1 /*
   2  * (C) Copyright 2001
   3  * Rob Taylor, Flying Pig Systems. robt@flyingpig.com.
   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 <mpc824x.h>
  26 #include <pci.h>
  27
  28 int checkboard (void)
  29 {
  30         ulong busfreq  = get_bus_freq(0);
  31         char  buf[32];
  32
  33         printf("Board: A3000 Local Bus at %s MHz\n", strmhz(buf, busfreq));
  34         return 0;
  35
  36 }
  37
  38 long int initdram (int board_type)
  39 {
  40         int              i, cnt;
  41         volatile uchar * base= CFG_SDRAM_BASE;
  42         volatile ulong * addr;
  43         ulong            save[32];
  44         ulong            val, ret  = 0;
  45
  46         for (i=0, cnt=(CFG_MAX_RAM_SIZE / sizeof(long)) >> 1; cnt > 0; cnt >>= 1) {
  47                 addr = (volatile ulong *)base + cnt;
  48                 save[i++] = *addr;
  49                 *addr = ~cnt;
  50         }
  51
  52         addr = (volatile ulong *)base;
  53         save[i] = *addr;
  54         *addr = 0;
  55
  56         if (*addr != 0) {
  57                 *addr = save[i];
  58                 goto Done;
  59         }
  60
  61         for (cnt = 1; cnt <= CFG_MAX_RAM_SIZE / sizeof(long); cnt <<= 1) {
  62                 addr = (volatile ulong *)base + cnt;
  63                 val = *addr;
  64                 *addr = save[--i];
  65                 if (val != ~cnt) {
  66                         ulong new_bank0_end = cnt * sizeof(long) - 1;
  67                         ulong mear1  = mpc824x_mpc107_getreg(MEAR1);
  68                         ulong emear1 = mpc824x_mpc107_getreg(EMEAR1);
  69                         mear1 =  (mear1  & 0xFFFFFF00) |
  70                           ((new_bank0_end & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT);
  71                         emear1 = (emear1 & 0xFFFFFF00) |
  72                           ((new_bank0_end & MICR_ADDR_MASK) >> MICR_EADDR_SHIFT);
  73                         mpc824x_mpc107_setreg(MEAR1,  mear1);
  74                         mpc824x_mpc107_setreg(EMEAR1, emear1);
  75
  76                         ret = cnt * sizeof(long);
  77                         goto Done;
  78                 }
  79         }
  80
  81         ret = CFG_MAX_RAM_SIZE;
  82 Done:
  83         return ret;
  84 }
  85
  86 /*
  87  * Initialize PCI Devices
  88  */
  89 #if 1
  90 #ifndef CONFIG_PCI_PNP
  91 static struct pci_config_table pci_a3000_config_table[] = {
  92         { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
  93           0x0, 0x0, 0x0, /* unknown eth0 divice */
  94           pci_cfgfunc_config_device, { PCI_ENET0_IOADDR,
  95                                        PCI_ENET0_MEMADDR,
  96                                        PCI_COMMAND_IO |
  97                                        PCI_COMMAND_MEMORY |
  98                                        PCI_COMMAND_MASTER }},
  99         { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
 100           0x0, 0x0, 0x0, /* unknown eth1 device */
 101           pci_cfgfunc_config_device, { PCI_ENET1_IOADDR,
 102                                        PCI_ENET1_MEMADDR,
 103                                        PCI_COMMAND_IO |
 104                                        PCI_COMMAND_MEMORY |
 105                                        PCI_COMMAND_MASTER }},
 106         { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
 107           0x0, 0x0, 0x0, /* unknown eth1 device */
 108           pci_cfgfunc_config_device, { PCI_ENET2_IOADDR,
 109                                        PCI_ENET2_MEMADDR,
 110                                        PCI_COMMAND_IO |
 111                                        PCI_COMMAND_MEMORY |
 112                                        PCI_COMMAND_MASTER }},
 113         { }
 114 };
 115 #endif
 116
 117 #else
 118
 119 #ifndef CONFIG_PCI_PNP
 120 static struct pci_config_table pci_a3000_config_table[] = {
 121         { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, 0x0f, PCI_ANY_ID,
 122           pci_cfgfunc_config_device, { PCI_ENET0_IOADDR,
 123                                        PCI_ENET0_MEMADDR,
 124                                        PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER }},
 125         { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, 0x10, PCI_ANY_ID,
 126           pci_cfgfunc_config_device, { PCI_ENET1_IOADDR,
 127                                        PCI_ENET1_MEMADDR,
 128                                        PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER }},
 129         { }
 130 };
 131 #endif
 132
 133 #endif
 134
 135 struct pci_controller hose = {
 136 #ifndef CONFIG_PCI_PNP
 137         config_table: pci_a3000_config_table,
 138 #endif
 139 };
 140
 141 void pci_init_board(void)
 142 {
 143         pci_mpc824x_init(&hose);
 144 }