socrates.c

/*
 * Copyright (c) 2008 Emcraft Systems
 * Sergei Poselenov <sposelenov@emcraft.com>
 *
 * Based on MPC8560 ADS and arch/ppc tqm85xx ports
 *
 * Maintained by Kumar Gala (see MAINTAINERS for contact information)
 *
 * Copyright 2008 Freescale Semiconductor Inc.
 *
 * Copyright (c) 2005-2006 DENX Software Engineering
 * Stefan Roese <sr@denx.de>
 *
 * Based on original work by
 * 	Kumar Gala <kumar.gala@freescale.com>
 *      Copyright 2004 Freescale Semiconductor Inc.
 *
 * 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 <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/of_platform.h>

#include <asm/system.h>
#include <asm/time.h>
#include <asm/machdep.h>
#include <asm/pci-bridge.h>
#include <asm/mpic.h>
#include <asm/prom.h>
#include <mm/mmu_decl.h>
#include <asm/udbg.h>

#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>

#include "socrates_fpga_pic.h"

static void __init socrates_pic_init(void)
{
	struct mpic *mpic;
	struct resource r;
	struct device_node *np;

	np = of_find_node_by_type(NULL, "open-pic");
	if (!np) {
		printk(KERN_ERR "Could not find open-pic node\n");
		return;
	}

	if (of_address_to_resource(np, 0, &r)) {
		printk(KERN_ERR "Could not map mpic register space\n");
		of_node_put(np);
		return;
	}

	mpic = mpic_alloc(np, r.start,
			MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
			0, 256, " OpenPIC  ");
	BUG_ON(mpic == NULL);
	of_node_put(np);

	mpic_init(mpic);

	np = of_find_compatible_node(NULL, NULL, "abb,socrates-fpga-pic");
	if (!np) {
		printk(KERN_ERR "Could not find socrates-fpga-pic node\n");
		return;
	}
	socrates_fpga_pic_init(np);
	of_node_put(np);
}

/*
 * Setup the architecture
 */
static void __init socrates_setup_arch(void)
{
#ifdef CONFIG_PCI
	struct device_node *np;
#endif

	if (ppc_md.progress)
		ppc_md.progress("socrates_setup_arch()", 0);

#ifdef CONFIG_PCI
	for_each_compatible_node(np, "pci", "fsl,mpc8540-pci")
		fsl_add_bridge(np, 1);
#endif
}

static struct of_device_id __initdata socrates_of_bus_ids[] = {
	{ .compatible = "simple-bus", },
	{ .compatible = "gianfar", },
	{},
};

static int __init socrates_publish_devices(void)
{
	return of_platform_bus_probe(NULL, socrates_of_bus_ids, NULL);
}
machine_device_initcall(socrates, socrates_publish_devices);

/*
 * Called very early, device-tree isn't unflattened
 */
static int __init socrates_probe(void)
{
	unsigned long root = of_get_flat_dt_root();

	if (of_flat_dt_is_compatible(root, "abb,socrates"))
		return 1;

	return 0;
}

define_machine(socrates) {
	.name			= "Socrates",
	.probe			= socrates_probe,
	.setup_arch		= socrates_setup_arch,
	.init_IRQ		= socrates_pic_init,
	.get_irq		= mpic_get_irq,
	.restart		= fsl_rstcr_restart,
	.calibrate_decr		= generic_calibrate_decr,
	.progress		= udbg_progress,
};