summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/platforms/embedded6xx/storcenter.c
blob: f1eebcae9bf0b7e353b1a3cbabc091b386553960 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
/*
 * 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/system.h>
#include <asm/time.h>
#include <asm/prom.h>
#include <asm/mpic.h>
#include <asm/pci-bridge.h>

#include "mpc10x.h"


static __initdata struct of_device_id storcenter_of_bus[] = {
	{ .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 %s\n", dev->full_name);

	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)
{
	struct device_node *np;

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

	printk(KERN_INFO "IOMEGA StorCenter\n");
}

/*
 * 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;
	struct device_node *dnp;
	const void *prop;
	int size;
	phys_addr_t paddr;

	dnp = of_find_node_by_type(NULL, "open-pic");
	if (dnp == NULL)
		return;

	prop = of_get_property(dnp, "reg", &size);
	if (prop == NULL) {
		of_node_put(dnp);
		return;
	}

	paddr = (phys_addr_t)of_translate_address(dnp, prop);
	mpic = mpic_alloc(dnp, paddr, MPIC_PRIMARY | MPIC_WANTS_RESET,
			16, 32, " OpenPIC  ");

	of_node_put(dnp);

	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, paddr + 0x10200);
	mpic_assign_isu(mpic, 1, paddr + 0x11000);

	mpic_init(mpic);
}

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

	/* Set exception prefix high - to the firmware */
	_nmask_and_or_msr(0, MSR_IP);

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

static int __init storcenter_probe(void)
{
	unsigned long root = of_get_flat_dt_root();

	return of_flat_dt_is_compatible(root, "iomega,storcenter");
}

define_machine(storcenter){
	.name 			= "IOMEGA StorCenter",
	.probe 			= storcenter_probe,
	.setup_arch 		= storcenter_setup_arch,
	.init_IRQ 		= storcenter_init_IRQ,
	.get_irq 		= mpic_get_irq,
	.restart 		= storcenter_restart,
	.calibrate_decr 	= generic_calibrate_decr,
};