cuboot-hotfoot.c

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/*
 * Old U-boot compatibility for Esteem 195E Hotfoot CPU Board
 *
 * Author: Solomon Peachy <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 */

#include "ops.h"
#include "stdio.h"
#include "reg.h"
#include "dcr.h"
#include "4xx.h"
#include "cuboot.h"

#define TARGET_4xx
#define TARGET_HOTFOOT

#include "ppcboot-hotfoot.h"

static bd_t bd;

#define NUM_REGS 3

static void hotfoot_fixups(void)
{
    u32 uart = mfdcr(DCRN_CPC0_UCR) & 0x7f;

    dt_fixup_memory(bd.bi_memstart, bd.bi_memsize); 

    dt_fixup_cpu_clocks(bd.bi_procfreq, bd.bi_procfreq, 0);
    dt_fixup_clock("/plb", bd.bi_plb_busfreq);
    dt_fixup_clock("/plb/opb", bd.bi_opbfreq);
    dt_fixup_clock("/plb/ebc", bd.bi_pci_busfreq);
    dt_fixup_clock("/plb/opb/serial@ef600300", bd.bi_procfreq / uart); 
    dt_fixup_clock("/plb/opb/serial@ef600400", bd.bi_procfreq / uart); 
    
    dt_fixup_mac_address_by_alias("ethernet0", bd.bi_enetaddr);
    dt_fixup_mac_address_by_alias("ethernet1", bd.bi_enet1addr);

    /* Is this a single eth/serial board? */
    if ((bd.bi_enet1addr[0] == 0) && 
        (bd.bi_enet1addr[1] == 0) &&
        (bd.bi_enet1addr[2] == 0) &&
        (bd.bi_enet1addr[3] == 0) &&
        (bd.bi_enet1addr[4] == 0) &&
        (bd.bi_enet1addr[5] == 0)) {
        void *devp;

        printf("Trimming devtree for single serial/eth board\n");

        devp = finddevice("/plb/opb/serial@ef600300");
        if (!devp)
            fatal("Can't find node for /plb/opb/serial@ef600300");
        del_node(devp);

        devp = finddevice("/plb/opb/ethernet@ef600900");
        if (!devp)
            fatal("Can't find node for /plb/opb/ethernet@ef600900");
        del_node(devp);
    }

    ibm4xx_quiesce_eth((u32 *)0xef600800, (u32 *)0xef600900);

    /* Fix up flash size in fdt for 4M boards. */
    if (bd.bi_flashsize < 0x800000) {
        u32 regs[NUM_REGS];
        void *devp = finddevice("/plb/ebc/nor_flash@0");
        if (!devp)
            fatal("Can't find FDT node for nor_flash!??");

        printf("Fixing devtree for 4M Flash\n");
        
        /* First fix up the base addresse */
        getprop(devp, "reg", regs, sizeof(regs));
        regs[0] = 0;
        regs[1] = 0xffc00000;
        regs[2] = 0x00400000;
        setprop(devp, "reg", regs, sizeof(regs));
        
        /* Then the offsets */
        devp = finddevice("/plb/ebc/nor_flash@0/partition@0");
        if (!devp)
            fatal("Can't find FDT node for partition@0");
        getprop(devp, "reg", regs, 2*sizeof(u32));
        regs[0] -= 0x400000;
        setprop(devp, "reg", regs,  2*sizeof(u32));

        devp = finddevice("/plb/ebc/nor_flash@0/partition@1");
        if (!devp)
            fatal("Can't find FDT node for partition@1");
        getprop(devp, "reg", regs, 2*sizeof(u32));
        regs[0] -= 0x400000;
        setprop(devp, "reg", regs,  2*sizeof(u32));

        devp = finddevice("/plb/ebc/nor_flash@0/partition@2");
        if (!devp)
            fatal("Can't find FDT node for partition@2");
        getprop(devp, "reg", regs, 2*sizeof(u32));
        regs[0] -= 0x400000;
        setprop(devp, "reg", regs,  2*sizeof(u32));

        devp = finddevice("/plb/ebc/nor_flash@0/partition@3");
        if (!devp)
            fatal("Can't find FDT node for partition@3");
        getprop(devp, "reg", regs, 2*sizeof(u32));
        regs[0] -= 0x400000;
        setprop(devp, "reg", regs,  2*sizeof(u32));

        devp = finddevice("/plb/ebc/nor_flash@0/partition@4");
        if (!devp)
            fatal("Can't find FDT node for partition@4");
        getprop(devp, "reg", regs, 2*sizeof(u32));
        regs[0] -= 0x400000;
        setprop(devp, "reg", regs,  2*sizeof(u32));

        devp = finddevice("/plb/ebc/nor_flash@0/partition@6");
        if (!devp)
            fatal("Can't find FDT node for partition@6");
        getprop(devp, "reg", regs, 2*sizeof(u32));
        regs[0] -= 0x400000;
        setprop(devp, "reg", regs,  2*sizeof(u32));

        /* Delete the FeatFS node */
        devp = finddevice("/plb/ebc/nor_flash@0/partition@5");
        if (!devp)
            fatal("Can't find FDT node for partition@5");
        del_node(devp);
    }
}

void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
           unsigned long r6, unsigned long r7)
{
    CUBOOT_INIT();
    platform_ops.fixups = hotfoot_fixups;
        platform_ops.exit = ibm40x_dbcr_reset;
    fdt_init(_dtb_start);
    serial_console_init();
}