storcenter.c

  1/*
  2 * Board setup routines for the storcenter
  3 *
  4 * Copyright 2007 (C) Oyvind Repvik (nail@nslu2-linux.org)
  5 * Copyright 2007 Andy Wilcox, Jon Loeliger
  6 *
  7 * Based on linkstation.c by G. Liakhovetski
  8 *
  9 * This file is licensed under the terms of the GNU General Public License
 10 * version 2.  This program is licensed "as is" without any warranty of
 11 * any kind, whether express or implied.
 12 */
 13
 14#include <linux/kernel.h>
 15#include <linux/pci.h>
 16#include <linux/initrd.h>
 17#include <linux/of_platform.h>
 18
 19#include <asm/time.h>
 20#include <asm/mpic.h>
 21#include <asm/pci-bridge.h>
 22
 23#include "mpc10x.h"
 24
 25
 26static const struct of_device_id storcenter_of_bus[] __initconst = {
 27	{ .name = "soc", },
 28	{},
 29};
 30
 31static int __init storcenter_device_probe(void)
 32{
 33	of_platform_bus_probe(NULL, storcenter_of_bus, NULL);
 34	return 0;
 35}
 36machine_device_initcall(storcenter, storcenter_device_probe);
 37
 38
 39static int __init storcenter_add_bridge(struct device_node *dev)
 40{
 41#ifdef CONFIG_PCI
 42	int len;
 43	struct pci_controller *hose;
 44	const int *bus_range;
 45
 46	printk("Adding PCI host bridge %pOF\n", dev);
 47
 48	hose = pcibios_alloc_controller(dev);
 49	if (hose == NULL)
 50		return -ENOMEM;
 51
 52	bus_range = of_get_property(dev, "bus-range", &len);
 53	hose->first_busno = bus_range ? bus_range[0] : 0;
 54	hose->last_busno = bus_range ? bus_range[1] : 0xff;
 55
 56	setup_indirect_pci(hose, MPC10X_MAPB_CNFG_ADDR, MPC10X_MAPB_CNFG_DATA, 0);
 57
 58	/* Interpret the "ranges" property */
 59	/* This also maps the I/O region and sets isa_io/mem_base */
 60	pci_process_bridge_OF_ranges(hose, dev, 1);
 61#endif
 62
 63	return 0;
 64}
 65
 66static void __init storcenter_setup_arch(void)
 67{
 68	printk(KERN_INFO "IOMEGA StorCenter\n");
 69}
 70
 71static void __init storcenter_setup_pci(void)
 72{
 73	struct device_node *np;
 74
 75	/* Lookup PCI host bridges */
 76	for_each_compatible_node(np, "pci", "mpc10x-pci")
 77		storcenter_add_bridge(np);
 78}
 79
 80/*
 81 * Interrupt setup and service.  Interrupts on the turbostation come
 82 * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
 83 */
 84static void __init storcenter_init_IRQ(void)
 85{
 86	struct mpic *mpic;
 87
 88	mpic = mpic_alloc(NULL, 0, 0, 16, 0, " OpenPIC  ");
 89	BUG_ON(mpic == NULL);
 90
 91	/*
 92	 * 16 Serial Interrupts followed by 16 Internal Interrupts.
 93	 * I2C is the second internal, so it is at 17, 0x11020.
 94	 */
 95	mpic_assign_isu(mpic, 0, mpic->paddr + 0x10200);
 96	mpic_assign_isu(mpic, 1, mpic->paddr + 0x11000);
 97
 98	mpic_init(mpic);
 99}
100
101static void __noreturn storcenter_restart(char *cmd)
102{
103	local_irq_disable();
104
105	/* Set exception prefix high - to the firmware */
106	mtmsr(mfmsr() | MSR_IP);
107	isync();
108
109	/* Wait for reset to happen */
110	for (;;) ;
111}
112
113define_machine(storcenter){
114	.name 			= "IOMEGA StorCenter",
115	.compatible		= "iomega,storcenter",
116	.setup_arch 		= storcenter_setup_arch,
117	.discover_phbs 		= storcenter_setup_pci,
118	.init_IRQ 		= storcenter_init_IRQ,
119	.get_irq 		= mpic_get_irq,
120	.restart 		= storcenter_restart,
121};