[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / powerpc / boot / ebony.c

/*
 * Copyright 2007 David Gibson, IBM Corporation.
 *
 * Based on earlier code:
 *   Copyright (C) Paul Mackerras 1997.
 *
 *   Matt Porter <mporter@kernel.crashing.org>
 *   Copyright 2002-2005 MontaVista Software Inc.
 *
 *   Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
 *   Copyright (c) 2003, 2004 Zultys Technologies
 *
 * 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.
 */
#include <stdarg.h>
#include <stddef.h>
#include "types.h"
#include "elf.h"
#include "string.h"
#include "stdio.h"
#include "page.h"
#include "ops.h"
#include "reg.h"
#include "io.h"
#include "dcr.h"
#include "4xx.h"
#include "44x.h"

static u8 *ebony_mac0, *ebony_mac1;

#define EBONY_FPGA_PATH		"/plb/opb/ebc/fpga"
#define	EBONY_FPGA_FLASH_SEL	0x01
#define EBONY_SMALL_FLASH_PATH	"/plb/opb/ebc/small-flash"

static void ebony_flashsel_fixup(void)
{
	void *devp;
	u32 reg[3] = {0x0, 0x0, 0x80000};
	u8 *fpga;
	u8 fpga_reg0 = 0x0;

	devp = finddevice(EBONY_FPGA_PATH);
	if (!devp)
		fatal("Couldn't locate FPGA node %s\n\r", EBONY_FPGA_PATH);

	if (getprop(devp, "virtual-reg", &fpga, sizeof(fpga)) != sizeof(fpga))
		fatal("%s has missing or invalid virtual-reg property\n\r",
		      EBONY_FPGA_PATH);

	fpga_reg0 = in_8(fpga);

	devp = finddevice(EBONY_SMALL_FLASH_PATH);
	if (!devp)
		fatal("Couldn't locate small flash node %s\n\r",
		      EBONY_SMALL_FLASH_PATH);

	if (getprop(devp, "reg", reg, sizeof(reg)) != sizeof(reg))
		fatal("%s has reg property of unexpected size\n\r",
		      EBONY_SMALL_FLASH_PATH);

	/* Invert address bit 14 (IBM-endian) if FLASH_SEL fpga bit is set */
	if (fpga_reg0 & EBONY_FPGA_FLASH_SEL)
		reg[1] ^= 0x80000;

	setprop(devp, "reg", reg, sizeof(reg));
}

static void ebony_fixups(void)
{
	// FIXME: sysclk should be derived by reading the FPGA registers
	unsigned long sysclk = 33000000;

	ibm440gp_fixup_clocks(sysclk, 6 * 1843200);
	ibm4xx_sdram_fixup_memsize();
	dt_fixup_mac_address_by_alias("ethernet0", ebony_mac0);
	dt_fixup_mac_address_by_alias("ethernet1", ebony_mac1);
	ibm4xx_fixup_ebc_ranges("/plb/opb/ebc");
	ebony_flashsel_fixup();
}

void ebony_init(void *mac0, void *mac1)
{
	platform_ops.fixups = ebony_fixups;
	platform_ops.exit = ibm44x_dbcr_reset;
	ebony_mac0 = mac0;
	ebony_mac1 = mac1;
	fdt_init(_dtb_start);
	serial_console_init();
}
Commit	Line	Data
f6dfc805 DG	1	/*
	2	* Copyright 2007 David Gibson, IBM Corporation.
	3	*
	4	* Based on earlier code:
	5	* Copyright (C) Paul Mackerras 1997.
	6	*
	7	* Matt Porter <mporter@kernel.crashing.org>
	8	* Copyright 2002-2005 MontaVista Software Inc.
	9	*
	10	* Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
	11	* Copyright (c) 2003, 2004 Zultys Technologies
	12	*
	13	* This program is free software; you can redistribute it and/or
	14	* modify it under the terms of the GNU General Public License
	15	* as published by the Free Software Foundation; either version
	16	* 2 of the License, or (at your option) any later version.
	17	*/
	18	#include <stdarg.h>
	19	#include <stddef.h>
	20	#include "types.h"
	21	#include "elf.h"
	22	#include "string.h"
	23	#include "stdio.h"
	24	#include "page.h"
	25	#include "ops.h"
	26	#include "reg.h"
0d279d47	27	#include "io.h"
f6dfc805	28	#include "dcr.h"
e90f3b74	29	#include "4xx.h"
f6dfc805 DG	30	#include "44x.h"
f6dfc805 DG	31
f6dfc805 DG	32	static u8 ebony_mac0, ebony_mac1;
f6dfc805 DG	33
0d279d47 DG	34	#define EBONY_FPGA_PATH "/plb/opb/ebc/fpga"
	35	#define EBONY_FPGA_FLASH_SEL 0x01
	36	#define EBONY_SMALL_FLASH_PATH "/plb/opb/ebc/small-flash"
	37
	38	static void ebony_flashsel_fixup(void)
	39	{
	40	void *devp;
	41	u32 reg[3] = {0x0, 0x0, 0x80000};
	42	u8 *fpga;
	43	u8 fpga_reg0 = 0x0;
	44
	45	devp = finddevice(EBONY_FPGA_PATH);
	46	if (!devp)
	47	fatal("Couldn't locate FPGA node %s\n\r", EBONY_FPGA_PATH);
	48
	49	if (getprop(devp, "virtual-reg", &fpga, sizeof(fpga)) != sizeof(fpga))
	50	fatal("%s has missing or invalid virtual-reg property\n\r",
	51	EBONY_FPGA_PATH);
	52
	53	fpga_reg0 = in_8(fpga);
	54
	55	devp = finddevice(EBONY_SMALL_FLASH_PATH);
	56	if (!devp)
	57	fatal("Couldn't locate small flash node %s\n\r",
	58	EBONY_SMALL_FLASH_PATH);
	59
	60	if (getprop(devp, "reg", reg, sizeof(reg)) != sizeof(reg))
	61	fatal("%s has reg property of unexpected size\n\r",
	62	EBONY_SMALL_FLASH_PATH);
	63
	64	/* Invert address bit 14 (IBM-endian) if FLASH_SEL fpga bit is set */
	65	if (fpga_reg0 & EBONY_FPGA_FLASH_SEL)
	66	reg[1] ^= 0x80000;
	67
	68	setprop(devp, "reg", reg, sizeof(reg));
	69	}
	70
f6dfc805 DG	71	static void ebony_fixups(void)
	72	{
	73	// FIXME: sysclk should be derived by reading the FPGA registers
	74	unsigned long sysclk = 33000000;
	75
	76	ibm440gp_fixup_clocks(sysclk, 6 * 1843200);
d23f5099	77	ibm4xx_sdram_fixup_memsize();
ecc6cd73 DG	78	dt_fixup_mac_address_by_alias("ethernet0", ebony_mac0);
ecc6cd73 DG	79	dt_fixup_mac_address_by_alias("ethernet1", ebony_mac1);
b2ba34f3	80	ibm4xx_fixup_ebc_ranges("/plb/opb/ebc");
0d279d47	81	ebony_flashsel_fixup();
f6dfc805 DG	82	}
f6dfc805 DG	83
f6dfc805 DG	84	void ebony_init(void mac0, void mac1)
	85	{
	86	platform_ops.fixups = ebony_fixups;
11123346	87	platform_ops.exit = ibm44x_dbcr_reset;
f6dfc805 DG	88	ebony_mac0 = mac0;
f6dfc805 DG	89	ebony_mac1 = mac1;
2f0dfeaa	90	fdt_init(_dtb_start);
f6dfc805 DG	91	serial_console_init();
f6dfc805 DG	92	}