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 
26 static const struct of_device_id storcenter_of_bus[] __initconst = {
27 	{ .name = "soc", },
28 	{},
29 };
30 
31 static int __init storcenter_device_probe(void)
32 {
33 	of_platform_bus_probe(NULL, storcenter_of_bus, NULL);
34 	return 0;
35 }
36 machine_device_initcall(storcenter, storcenter_device_probe);
37 
38 
39 static 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 
66 static void __init storcenter_setup_arch(void)
67 {
68 	printk(KERN_INFO "IOMEGA StorCenter\n");
69 }
70 
71 static 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  */
84 static 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 
101 static 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 
113 static int __init storcenter_probe(void)
114 {
115 	return of_machine_is_compatible("iomega,storcenter");
116 }
117 
118 define_machine(storcenter){
119 	.name 			= "IOMEGA StorCenter",
120 	.probe 			= storcenter_probe,
121 	.setup_arch 		= storcenter_setup_arch,
122 	.discover_phbs 		= storcenter_setup_pci,
123 	.init_IRQ 		= storcenter_init_IRQ,
124 	.get_irq 		= mpic_get_irq,
125 	.restart 		= storcenter_restart,
126 	.calibrate_decr 	= generic_calibrate_decr,
127 };
128