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};
122