/*
 * (C) Copyright 2007-2010 DENX Software Engineering
 * Copyright (C) 2004-2006 Freescale Semiconductor, Inc.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

/*
 * CPU specific code for the MPC512x family.
 *
 * Derived from the MPC83xx code.
 */

#include <common.h>
#include <command.h>
#include <net.h>
#include <netdev.h>
#include <asm/processor.h>
#include <asm/io.h>

#if defined(CONFIG_OF_LIBFDT)
#include <fdt_support.h>
#endif

DECLARE_GLOBAL_DATA_PTR;

int checkcpu (void)
{
        volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
        ulong clock = gd->cpu_clk;
        u32 pvr = get_pvr ();
        u32 spridr = in_be32(&immr->sysconf.spridr);
        char buf1[32], buf2[32];

        puts ("CPU:   ");

        switch (spridr & 0xffff0000) {
        case SPR_5121E:
                puts ("MPC5121e ");
                break;
        default:
                printf ("Unknown part ID %08x ", spridr & 0xffff0000);
        }
        printf ("rev. %d.%d, Core ", SVR_MJREV (spridr), SVR_MNREV (spridr));

        switch (pvr & 0xffff0000) {
        case PVR_E300C4:
                puts ("e300c4 ");
                break;
        default:
                puts ("unknown ");
        }
        printf ("at %s MHz, CSB at %s MHz (RSR=0x%04lx)\n",
                strmhz(buf1, clock),
                strmhz(buf2, gd->arch.csb_clk),
                gd->arch.reset_status & 0xffff);
        return 0;
}


int
do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
        ulong msr;
        volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;

        /* Interrupts and MMU off */
        __asm__ __volatile__ ("mfmsr    %0":"=r" (msr):);

        msr &= ~( MSR_EE | MSR_IR | MSR_DR);
        __asm__ __volatile__ ("mtmsr    %0"::"r" (msr));

        /*
         * Enable Reset Control Reg - "RSTE" is the magic word that let us go
         */
        out_be32(&immap->reset.rpr, 0x52535445);

        /* Verify Reset Control Reg is enabled */
        while (!(in_be32(&immap->reset.rcer) & RCER_CRE))
                ;

        printf ("Resetting the board.\n");
        udelay(200);

        /* Perform reset */
        out_be32(&immap->reset.rcr, RCR_SWHR);

        /* Unreached... */
        return 1;
}


/*
 * Get timebase clock frequency (like cpu_clk in Hz)
 */
unsigned long get_tbclk (void)
{
        ulong tbclk;

        tbclk = (gd->bus_clk + 3L) / 4L;

        return tbclk;
}


#if defined(CONFIG_WATCHDOG)
void watchdog_reset (void)
{
        int re_enable = disable_interrupts ();

        /* Reset watchdog */
        volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
        out_be32(&immr->wdt.swsrr, 0x556c);
        out_be32(&immr->wdt.swsrr, 0xaa39);

        if (re_enable)
                enable_interrupts ();
}
#endif

#ifdef CONFIG_OF_LIBFDT

#ifdef CONFIG_OF_SUPPORT_OLD_DEVICE_TREES
/*
 * fdt setup for old device trees
 * fix up
 *      cpu clocks
 *      soc clocks
 *      ethernet addresses
 */
static void old_ft_cpu_setup(void *blob, bd_t *bd)
{
        /*
         * avoid fixing up by path because that
         * produces scary error messages
         */
        uchar enetaddr[6];

        /*
         * old device trees have ethernet nodes with
         * device_type = "network"
         */
        eth_getenv_enetaddr("ethaddr", enetaddr);
        do_fixup_by_prop(blob, "device_type", "network", 8,
                "local-mac-address", enetaddr, 6, 0);
        do_fixup_by_prop(blob, "device_type", "network", 8,
                "address", enetaddr, 6, 0);
        /*
         * old device trees have soc nodes with
         * device_type = "soc"
         */
        do_fixup_by_prop_u32(blob, "device_type", "soc", 4,
                "bus-frequency", bd->bi_ipsfreq, 0);
}
#endif

static void ft_clock_setup(void *blob, bd_t *bd)
{
        char *cpu_path = "/cpus/" OF_CPU;

        /*
         * fixup cpu clocks using path
         */
        do_fixup_by_path_u32(blob, cpu_path,
                "timebase-frequency", OF_TBCLK, 1);
        do_fixup_by_path_u32(blob, cpu_path,
                "bus-frequency", bd->bi_busfreq, 1);
        do_fixup_by_path_u32(blob, cpu_path,
                "clock-frequency", bd->bi_intfreq, 1);
        /*
         * fixup soc clocks using compatible
         */
        do_fixup_by_compat_u32(blob, OF_SOC_COMPAT,
                "bus-frequency", bd->bi_ipsfreq, 1);
}

void ft_cpu_setup(void *blob, bd_t *bd)
{
#ifdef CONFIG_OF_SUPPORT_OLD_DEVICE_TREES
        old_ft_cpu_setup(blob, bd);
#endif
        ft_clock_setup(blob, bd);
#ifdef CONFIG_HAS_ETH0
        fdt_fixup_ethernet(blob);
#endif
        fdt_fixup_memory(blob, (u64)bd->bi_memstart, (u64)bd->bi_memsize);
}
#endif

#ifdef CONFIG_MPC512x_FEC
/* Default initializations for FEC controllers.  To override,
 * create a board-specific function called:
 *      int board_eth_init(bd_t *bis)
 */

int cpu_eth_init(bd_t *bis)
{
        return mpc512x_fec_initialize(bis);
}
#endif