board/incaip/incaip.c

   1 /*
   2  * (C) Copyright 2003
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.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 <netdev.h>
  27 #include <asm/addrspace.h>
  28 #include <asm/inca-ip.h>
  29 #include <asm/io.h>
  30 #include <asm/reboot.h>
  31
  32 extern uint incaip_get_cpuclk(void);
  33
  34 void _machine_restart(void)
  35 {
  36         *INCA_IP_WDT_RST_REQ = 0x3f;
  37 }
  38
  39 static ulong max_sdram_size(void)
  40 {
  41         /* The only supported SDRAM data width is 16bit.
  42          */
  43 #define CONFIG_SYS_DW   2
  44
  45         /* The only supported number of SDRAM banks is 4.
  46          */
  47 #define CONFIG_SYS_NB   4
  48
  49         ulong cfgpb0 = *INCA_IP_SDRAM_MC_CFGPB0;
  50         int   cols   = cfgpb0 & 0xF;
  51         int   rows   = (cfgpb0 & 0xF0) >> 4;
  52         ulong size   = (1 << (rows + cols)) * CONFIG_SYS_DW * CONFIG_SYS_NB;
  53
  54         return size;
  55 }
  56
  57 phys_size_t initdram(int board_type)
  58 {
  59         int   rows, cols, best_val = *INCA_IP_SDRAM_MC_CFGPB0;
  60         ulong size, max_size       = 0;
  61         ulong our_address;
  62
  63         asm volatile ("move %0, $25" : "=r" (our_address) :);
  64
  65                 /* Can't probe for RAM size unless we are running from Flash.
  66                  */
  67         if (CPHYSADDR(our_address) < CPHYSADDR(PHYS_FLASH_1))
  68         {
  69                 return max_sdram_size();
  70         }
  71
  72         for (cols = 0x8; cols <= 0xC; cols++)
  73         {
  74                 for (rows = 0xB; rows <= 0xD; rows++)
  75                 {
  76                         *INCA_IP_SDRAM_MC_CFGPB0 = (0x14 << 8) |
  77                                                    (rows << 4) | cols;
  78                         size = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE,
  79                                                              max_sdram_size());
  80
  81                         if (size > max_size)
  82                         {
  83                                 best_val = *INCA_IP_SDRAM_MC_CFGPB0;
  84                                 max_size = size;
  85                         }
  86                 }
  87         }
  88
  89         *INCA_IP_SDRAM_MC_CFGPB0 = best_val;
  90         return max_size;
  91 }
  92
  93 int checkboard (void)
  94 {
  95         unsigned long chipid = *INCA_IP_WDT_CHIPID;
  96         int part_num;
  97
  98         puts ("Board: INCA-IP ");
  99         part_num = (chipid >> 12) & 0xffff;
 100         switch (part_num) {
 101         case 0xc0:
 102                 printf ("Standard Version, ");
 103                 break;
 104         case 0xc1:
 105                 printf ("Basic Version, ");
 106                 break;
 107         default:
 108                 printf ("Unknown Part Number 0x%x ", part_num);
 109                 break;
 110         }
 111
 112         printf ("Chip V1.%ld, ", (chipid >> 28));
 113
 114         printf("CPU Speed %d MHz\n", incaip_get_cpuclk()/1000000);
 115
 116         set_io_port_base(0);
 117
 118         return 0;
 119 }
 120
 121 #if defined(CONFIG_INCA_IP_SWITCH)
 122 int board_eth_init(bd_t *bis)
 123 {
 124         return inca_switch_initialize(bis);
 125 }
 126 #endif