arch/powerpc/cpu/mpc5xxx/cpu.c

   1 /*
   2  * (C) Copyright 2000-2010
   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         uint svr, pvr;
  54
  55         puts ("CPU:   ");
  56
  57         svr = get_svr();
  58         pvr = get_pvr();
  59
  60         switch (pvr) {
  61         case PVR_5200:
  62                 printf("MPC5200");
  63                 break;
  64         case PVR_5200B:
  65                 printf("MPC5200B");
  66                 break;
  67         default:
  68                 printf("Unknown MPC5xxx");
  69                 break;
  70         }
  71
  72         printf (" v%d.%d, Core v%d.%d", SVR_MJREV (svr), SVR_MNREV (svr),
  73                 PVR_MAJ(pvr), PVR_MIN(pvr));
  74         printf (" at %s MHz\n", strmhz (buf, clock));
  75         return 0;
  76 }
  77
  78 /* ------------------------------------------------------------------------- */
  79
  80 int
  81 do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
  82 {
  83         ulong msr;
  84         /* Interrupts and MMU off */
  85         __asm__ __volatile__ ("mfmsr    %0":"=r" (msr):);
  86
  87         msr &= ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR);
  88         __asm__ __volatile__ ("mtmsr    %0"::"r" (msr));
  89
  90         /* Charge the watchdog timer */
  91         *(vu_long *)(MPC5XXX_GPT0_COUNTER) = 0x0001000f;
  92         *(vu_long *)(MPC5XXX_GPT0_ENABLE) = 0x9004; /* wden|ce|timer_ms */
  93         while(1);
  94
  95         return 1;
  96
  97 }
  98
  99 /* ------------------------------------------------------------------------- */
 100
 101 /*
 102  * Get timebase clock frequency (like cpu_clk in Hz)
 103  *
 104  */
 105 unsigned long get_tbclk (void)
 106 {
 107         ulong tbclk;
 108
 109         tbclk = (gd->bus_clk + 3L) / 4L;
 110
 111         return (tbclk);
 112 }
 113
 114 /* ------------------------------------------------------------------------- */
 115
 116 #if defined(CONFIG_OF_LIBFDT) && defined (CONFIG_OF_BOARD_SETUP)
 117 void ft_cpu_setup(void *blob, bd_t *bd)
 118 {
 119         int div = in_8((void*)CONFIG_SYS_MBAR + 0x204) & 0x0020 ? 8 : 4;
 120         char * cpu_path = "/cpus/" OF_CPU;
 121 #ifdef CONFIG_MPC5xxx_FEC
 122         uchar enetaddr[6];
 123         char * eth_path = "/" OF_SOC "/ethernet@3000";
 124 #endif
 125
 126         do_fixup_by_path_u32(blob, cpu_path, "timebase-frequency", OF_TBCLK, 1);
 127         do_fixup_by_path_u32(blob, cpu_path, "bus-frequency", bd->bi_busfreq, 1);
 128         do_fixup_by_path_u32(blob, cpu_path, "clock-frequency", bd->bi_intfreq, 1);
 129         do_fixup_by_path_u32(blob, "/" OF_SOC, "bus-frequency", bd->bi_ipbfreq, 1);
 130         do_fixup_by_path_u32(blob, "/" OF_SOC, "system-frequency",
 131                                 bd->bi_busfreq*div, 1);
 132 #ifdef CONFIG_MPC5xxx_FEC
 133         eth_getenv_enetaddr("ethaddr", enetaddr);
 134         do_fixup_by_path(blob, eth_path, "mac-address", enetaddr, 6, 0);
 135         do_fixup_by_path(blob, eth_path, "local-mac-address", enetaddr, 6, 0);
 136 #endif
 137 #if defined(CONFIG_OF_IDE_FIXUP)
 138         if (!ide_device_present(0)) {
 139                 /* NO CF card detected -> delete ata node in DTS */
 140                 int nodeoffset = 0;
 141                 char nodename[] = "/soc5200@f0000000/ata@3a00";
 142
 143                 nodeoffset = fdt_path_offset(blob, nodename);
 144                 if (nodeoffset >= 0) {
 145                         fdt_del_node(blob, nodeoffset);
 146                 } else {
 147                         printf("%s: cannot find %s node err:%s\n",
 148                                 __func__, nodename, fdt_strerror(nodeoffset));
 149                 }
 150         }
 151
 152 #endif
 153         fdt_fixup_memory(blob, (u64)bd->bi_memstart, (u64)bd->bi_memsize);
 154 }
 155 #endif
 156
 157 #ifdef CONFIG_BOOTCOUNT_LIMIT
 158
 159 void bootcount_store (ulong a)
 160 {
 161         volatile ulong *save_addr = (volatile ulong *) (MPC5XXX_CDM_BRDCRMB);
 162
 163         *save_addr = (BOOTCOUNT_MAGIC & 0xffff0000) | a;
 164 }
 165
 166 ulong bootcount_load (void)
 167 {
 168         volatile ulong *save_addr = (volatile ulong *) (MPC5XXX_CDM_BRDCRMB);
 169
 170         if ((*save_addr & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
 171                 return 0;
 172         else
 173                 return (*save_addr & 0x0000ffff);
 174 }
 175 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 176
 177 #ifdef CONFIG_MPC5xxx_FEC
 178 /* Default initializations for FEC controllers.  To override,
 179  * create a board-specific function called:
 180  *      int board_eth_init(bd_t *bis)
 181  */
 182
 183 int cpu_eth_init(bd_t *bis)
 184 {
 185         return mpc5xxx_fec_initialize(bis);
 186 }
 187 #endif
 188
 189 #if defined(CONFIG_WATCHDOG)
 190 void watchdog_reset(void)
 191 {
 192         int re_enable = disable_interrupts();
 193         reset_5xxx_watchdog();
 194         if (re_enable) enable_interrupts();
 195 }
 196
 197 void reset_5xxx_watchdog(void)
 198 {
 199         volatile struct mpc5xxx_gpt *gpt0 =
 200                 (struct mpc5xxx_gpt *) MPC5XXX_GPT;
 201
 202         /* Trigger TIMER_0 by writing A5 to OCPW */
 203         clrsetbits_be32(&gpt0->emsr, 0xff000000, 0xa5000000);
 204 }
 205 #endif  /* CONFIG_WATCHDOG */