89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright 2007 David Gibson, IBM Corporation.
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*
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* Based on earlier code:
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* Copyright (C) Paul Mackerras 1997.
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*
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* Matt Porter <mporter@kernel.crashing.org>
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* Copyright 2002-2005 MontaVista Software Inc.
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*
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* Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
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* Copyright (c) 2003, 2004 Zultys Technologies
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*/
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#include <stdarg.h>
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#include <stddef.h>
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#include "types.h"
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#include "elf.h"
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#include "string.h"
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#include "stdio.h"
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#include "page.h"
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#include "ops.h"
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#include "reg.h"
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#include "io.h"
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#include "dcr.h"
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#include "4xx.h"
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#include "44x.h"
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static u8 *ebony_mac0, *ebony_mac1;
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#define EBONY_FPGA_PATH "/plb/opb/ebc/fpga"
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#define EBONY_FPGA_FLASH_SEL 0x01
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#define EBONY_SMALL_FLASH_PATH "/plb/opb/ebc/small-flash"
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static void ebony_flashsel_fixup(void)
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{
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void *devp;
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u32 reg[3] = {0x0, 0x0, 0x80000};
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u8 *fpga;
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u8 fpga_reg0 = 0x0;
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devp = finddevice(EBONY_FPGA_PATH);
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if (!devp)
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fatal("Couldn't locate FPGA node %s\n\r", EBONY_FPGA_PATH);
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if (getprop(devp, "virtual-reg", &fpga, sizeof(fpga)) != sizeof(fpga))
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fatal("%s has missing or invalid virtual-reg property\n\r",
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EBONY_FPGA_PATH);
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fpga_reg0 = in_8(fpga);
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devp = finddevice(EBONY_SMALL_FLASH_PATH);
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if (!devp)
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fatal("Couldn't locate small flash node %s\n\r",
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EBONY_SMALL_FLASH_PATH);
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if (getprop(devp, "reg", reg, sizeof(reg)) != sizeof(reg))
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fatal("%s has reg property of unexpected size\n\r",
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EBONY_SMALL_FLASH_PATH);
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/* Invert address bit 14 (IBM-endian) if FLASH_SEL fpga bit is set */
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if (fpga_reg0 & EBONY_FPGA_FLASH_SEL)
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reg[1] ^= 0x80000;
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setprop(devp, "reg", reg, sizeof(reg));
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}
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static void ebony_fixups(void)
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{
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// FIXME: sysclk should be derived by reading the FPGA registers
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unsigned long sysclk = 33000000;
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ibm440gp_fixup_clocks(sysclk, 6 * 1843200);
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ibm4xx_sdram_fixup_memsize();
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dt_fixup_mac_address_by_alias("ethernet0", ebony_mac0);
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dt_fixup_mac_address_by_alias("ethernet1", ebony_mac1);
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ibm4xx_fixup_ebc_ranges("/plb/opb/ebc");
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ebony_flashsel_fixup();
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}
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void ebony_init(void *mac0, void *mac1)
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{
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platform_ops.fixups = ebony_fixups;
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platform_ops.exit = ibm44x_dbcr_reset;
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ebony_mac0 = mac0;
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ebony_mac1 = mac1;
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fdt_init(_dtb_start);
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serial_console_init();
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}
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