cpu/mpc5xxx/cpu.c

   1 /*
   2  * (C) Copyright 2000-2003
   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 /*
  25  * CPU specific code for the MPC5xxx CPUs
  26  */
  27
  28 #include <common.h>
  29 #include <watchdog.h>
  30 #include <command.h>
  31 #include <net.h>
  32 #include <mpc5xxx.h>
  33 #include <netdev.h>
  34 #include <asm/io.h>
  35 #include <asm/processor.h>
  36
  37 #if defined(CONFIG_OF_LIBFDT)
  38 #include <libfdt.h>
  39 #include <libfdt_env.h>
  40 #include <fdt_support.h>
  41 #endif
  42
  43 #if defined(CONFIG_OF_IDE_FIXUP)
  44 #include <ide.h>
  45 #endif
  46
  47 DECLARE_GLOBAL_DATA_PTR;
  48
  49 int checkcpu (void)
  50 {
  51         ulong clock = gd->cpu_clk;
  52         char buf[32];
  53 #ifndef CONFIG_MGT5100
  54         uint svr, pvr;
  55 #endif
  56
  57         puts ("CPU:   ");
  58
  59 #ifdef CONFIG_MGT5100
  60         puts   (CPU_ID_STR);
  61         printf (" (JTAG ID %08lx)", *(vu_long *)MPC5XXX_CDM_JTAGID);
  62 #else
  63         svr = get_svr();
  64         pvr = get_pvr();
  65
  66         switch (pvr) {
  67         case PVR_5200:
  68                 printf("MPC5200");
  69                 break;
  70         case PVR_5200B:
  71                 printf("MPC5200B");
  72                 break;
  73         default:
  74                 printf("Unknown MPC5xxx");
  75                 break;
  76         }
  77
  78         printf (" v%d.%d, Core v%d.%d", SVR_MJREV (svr), SVR_MNREV (svr),
  79                 PVR_MAJ(pvr), PVR_MIN(pvr));
  80 #endif
  81         printf (" at %s MHz\n", strmhz (buf, clock));
  82         return 0;
  83 }
  84
  85 /* ------------------------------------------------------------------------- */
  86
  87 int
  88 do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
  89 {
  90         ulong msr;
  91         /* Interrupts and MMU off */
  92         __asm__ __volatile__ ("mfmsr    %0":"=r" (msr):);
  93
  94         msr &= ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR);
  95         __asm__ __volatile__ ("mtmsr    %0"::"r" (msr));
  96
  97         /* Charge the watchdog timer */
  98         *(vu_long *)(MPC5XXX_GPT0_COUNTER) = 0x0001000f;
  99         *(vu_long *)(MPC5XXX_GPT0_ENABLE) = 0x9004; /* wden|ce|timer_ms */
 100         while(1);
 101
 102         return 1;
 103
 104 }
 105
 106 /* ------------------------------------------------------------------------- */
 107
 108 /*
 109  * Get timebase clock frequency (like cpu_clk in Hz)
 110  *
 111  */
 112 unsigned long get_tbclk (void)
 113 {
 114         ulong tbclk;
 115
 116         tbclk = (gd->bus_clk + 3L) / 4L;
 117
 118         return (tbclk);
 119 }
 120
 121 /* ------------------------------------------------------------------------- */
 122
 123 #if defined(CONFIG_OF_LIBFDT) && defined (CONFIG_OF_BOARD_SETUP)
 124 void ft_cpu_setup(void *blob, bd_t *bd)
 125 {
 126         int div = in_8((void*)CONFIG_SYS_MBAR + 0x204) & 0x0020 ? 8 : 4;
 127         char * cpu_path = "/cpus/" OF_CPU;
 128 #ifdef CONFIG_MPC5xxx_FEC
 129         uchar enetaddr[6];
 130         char * eth_path = "/" OF_SOC "/ethernet@3000";
 131 #endif
 132
 133         do_fixup_by_path_u32(blob, cpu_path, "timebase-frequency", OF_TBCLK, 1);
 134         do_fixup_by_path_u32(blob, cpu_path, "bus-frequency", bd->bi_busfreq, 1);
 135         do_fixup_by_path_u32(blob, cpu_path, "clock-frequency", bd->bi_intfreq, 1);
 136         do_fixup_by_path_u32(blob, "/" OF_SOC, "bus-frequency", bd->bi_ipbfreq, 1);
 137         do_fixup_by_path_u32(blob, "/" OF_SOC, "system-frequency",
 138                                 bd->bi_busfreq*div, 1);
 139 #ifdef CONFIG_MPC5xxx_FEC
 140         eth_getenv_enetaddr("ethaddr", enetaddr);
 141         do_fixup_by_path(blob, eth_path, "mac-address", enetaddr, 6, 0);
 142         do_fixup_by_path(blob, eth_path, "local-mac-address", enetaddr, 6, 0);
 143 #endif
 144 #if defined(CONFIG_OF_IDE_FIXUP)
 145         if (!ide_device_present(0)) {
 146                 /* NO CF card detected -> delete ata node in DTS */
 147                 int nodeoffset = 0;
 148                 char nodename[] = "/soc5200@f0000000/ata@3a00";
 149
 150                 nodeoffset = fdt_path_offset(blob, nodename);
 151                 if (nodeoffset >= 0) {
 152                         fdt_del_node(blob, nodeoffset);
 153                 } else {
 154                         printf("%s: cannot find %s node err:%s\n",
 155                                 __func__, nodename, fdt_strerror(nodeoffset));
 156                 }
 157         }
 158
 159 #endif
 160 }
 161 #endif
 162
 163 #ifdef CONFIG_BOOTCOUNT_LIMIT
 164
 165 void bootcount_store (ulong a)
 166 {
 167         volatile ulong *save_addr = (volatile ulong *) (MPC5XXX_CDM_BRDCRMB);
 168
 169         *save_addr = (BOOTCOUNT_MAGIC & 0xffff0000) | a;
 170 }
 171
 172 ulong bootcount_load (void)
 173 {
 174         volatile ulong *save_addr = (volatile ulong *) (MPC5XXX_CDM_BRDCRMB);
 175
 176         if ((*save_addr & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
 177                 return 0;
 178         else
 179                 return (*save_addr & 0x0000ffff);
 180 }
 181 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 182
 183 #ifdef CONFIG_MPC5xxx_FEC
 184 /* Default initializations for FEC controllers.  To override,
 185  * create a board-specific function called:
 186  *      int board_eth_init(bd_t *bis)
 187  */
 188
 189 int cpu_eth_init(bd_t *bis)
 190 {
 191         return mpc5xxx_fec_initialize(bis);
 192 }
 193 #endif