xref: /kernel/linux/linux-6.6/arch/powerpc/platforms/embedded6xx/storcenter.c

/*
 * Board setup routines for the storcenter
 *
 * Copyright 2007 (C) Oyvind Repvik (nail@nslu2-linux.org)
 * Copyright 2007 Andy Wilcox, Jon Loeliger
 *
 * Based on linkstation.c by G. Liakhovetski
 *
 * This file is licensed under the terms of the GNU General Public License
 * version 2.  This program is licensed "as is" without any warranty of
 * any kind, whether express or implied.
 */

#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/initrd.h>
#include <linux/of_platform.h>

#include <asm/time.h>
#include <asm/mpic.h>
#include <asm/pci-bridge.h>

#include "mpc10x.h"


static const struct of_device_id storcenter_of_bus[] __initconst = {
	{ .name = "soc", },
	{},
};

static int __init storcenter_device_probe(void)
{
	of_platform_bus_probe(NULL, storcenter_of_bus, NULL);
	return 0;
}
machine_device_initcall(storcenter, storcenter_device_probe);


static int __init storcenter_add_bridge(struct device_node *dev)
{
#ifdef CONFIG_PCI
	int len;
	struct pci_controller *hose;
	const int *bus_range;

	printk("Adding PCI host bridge %pOF\n", dev);

	hose = pcibios_alloc_controller(dev);
	if (hose == NULL)
		return -ENOMEM;

	bus_range = of_get_property(dev, "bus-range", &len);
	hose->first_busno = bus_range ? bus_range[0] : 0;
	hose->last_busno = bus_range ? bus_range[1] : 0xff;

	setup_indirect_pci(hose, MPC10X_MAPB_CNFG_ADDR, MPC10X_MAPB_CNFG_DATA, 0);

	/* Interpret the "ranges" property */
	/* This also maps the I/O region and sets isa_io/mem_base */
	pci_process_bridge_OF_ranges(hose, dev, 1);
#endif

	return 0;
}

static void __init storcenter_setup_arch(void)
{
	printk(KERN_INFO "IOMEGA StorCenter\n");
}

static void __init storcenter_setup_pci(void)
{
	struct device_node *np;

	/* Lookup PCI host bridges */
	for_each_compatible_node(np, "pci", "mpc10x-pci")
		storcenter_add_bridge(np);
}

/*
 * Interrupt setup and service.  Interrupts on the turbostation come
 * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
 */
static void __init storcenter_init_IRQ(void)
{
	struct mpic *mpic;

	mpic = mpic_alloc(NULL, 0, 0, 16, 0, " OpenPIC  ");
	BUG_ON(mpic == NULL);

	/*
	 * 16 Serial Interrupts followed by 16 Internal Interrupts.
	 * I2C is the second internal, so it is at 17, 0x11020.
	 */
	mpic_assign_isu(mpic, 0, mpic->paddr + 0x10200);
	mpic_assign_isu(mpic, 1, mpic->paddr + 0x11000);

	mpic_init(mpic);
}

static void __noreturn storcenter_restart(char *cmd)
{
	local_irq_disable();

	/* Set exception prefix high - to the firmware */
	mtmsr(mfmsr() | MSR_IP);
	isync();

	/* Wait for reset to happen */
	for (;;) ;
}

define_machine(storcenter){
	.name 			= "IOMEGA StorCenter",
	.compatible		= "iomega,storcenter",
	.setup_arch 		= storcenter_setup_arch,
	.discover_phbs 		= storcenter_setup_pci,
	.init_IRQ 		= storcenter_init_IRQ,
	.get_irq 		= mpic_get_irq,
	.restart 		= storcenter_restart,
};