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/prom.h>
21#include <asm/mpic.h>
22#include <asm/pci-bridge.h>
23
24#include "mpc10x.h"
25
26
27static const struct of_device_id storcenter_of_bus[] __initconst = {
28	{ .name = "soc", },
29	{},
30};
31
32static int __init storcenter_device_probe(void)
33{
34	of_platform_bus_probe(NULL, storcenter_of_bus, NULL);
35	return 0;
36}
37machine_device_initcall(storcenter, storcenter_device_probe);
38
39
40static int __init storcenter_add_bridge(struct device_node *dev)
41{
42#ifdef CONFIG_PCI
43	int len;
44	struct pci_controller *hose;
45	const int *bus_range;
46
47	printk("Adding PCI host bridge %s\n", dev->full_name);
48
49	hose = pcibios_alloc_controller(dev);
50	if (hose == NULL)
51		return -ENOMEM;
52
53	bus_range = of_get_property(dev, "bus-range", &len);
54	hose->first_busno = bus_range ? bus_range[0] : 0;
55	hose->last_busno = bus_range ? bus_range[1] : 0xff;
56
57	setup_indirect_pci(hose, MPC10X_MAPB_CNFG_ADDR, MPC10X_MAPB_CNFG_DATA, 0);
58
59	/* Interpret the "ranges" property */
60	/* This also maps the I/O region and sets isa_io/mem_base */
61	pci_process_bridge_OF_ranges(hose, dev, 1);
62#endif
63
64	return 0;
65}
66
67static void __init storcenter_setup_arch(void)
68{
69	struct device_node *np;
70
71	/* Lookup PCI host bridges */
72	for_each_compatible_node(np, "pci", "mpc10x-pci")
73		storcenter_add_bridge(np);
74
75	printk(KERN_INFO "IOMEGA StorCenter\n");
76}
77
78/*
79 * Interrupt setup and service.  Interrupts on the turbostation come
80 * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
81 */
82static void __init storcenter_init_IRQ(void)
83{
84	struct mpic *mpic;
85
86	mpic = mpic_alloc(NULL, 0, 0, 16, 0, " OpenPIC  ");
87	BUG_ON(mpic == NULL);
88
89	/*
90	 * 16 Serial Interrupts followed by 16 Internal Interrupts.
91	 * I2C is the second internal, so it is at 17, 0x11020.
92	 */
93	mpic_assign_isu(mpic, 0, mpic->paddr + 0x10200);
94	mpic_assign_isu(mpic, 1, mpic->paddr + 0x11000);
95
96	mpic_init(mpic);
97}
98
99static void storcenter_restart(char *cmd)
100{
101	local_irq_disable();
102
103	/* Set exception prefix high - to the firmware */
104	_nmask_and_or_msr(0, MSR_IP);
105
106	/* Wait for reset to happen */
107	for (;;) ;
108}
109
110static int __init storcenter_probe(void)
111{
112	unsigned long root = of_get_flat_dt_root();
113
114	return of_flat_dt_is_compatible(root, "iomega,storcenter");
115}
116
117define_machine(storcenter){
118	.name 			= "IOMEGA StorCenter",
119	.probe 			= storcenter_probe,
120	.setup_arch 		= storcenter_setup_arch,
121	.init_IRQ 		= storcenter_init_IRQ,
122	.get_irq 		= mpic_get_irq,
123	.restart 		= storcenter_restart,
124	.calibrate_decr 	= generic_calibrate_decr,
125};
126