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/mtd/physmap.h>
18 #include <linux/of_platform.h>
19 
20 #include <asm/system.h>
21 #include <asm/time.h>
22 #include <asm/prom.h>
23 #include <asm/mpic.h>
24 #include <asm/pci-bridge.h>
25 
26 #include "mpc10x.h"
27 
28 
29 #ifdef CONFIG_MTD_PHYSMAP
30 static struct mtd_partition storcenter_physmap_partitions[] = {
31 	{
32 		.name   = "kernel",
33 		.offset = 0x000000,
34 		.size   = 0x170000,
35 	},
36 	{
37 		.name   = "rootfs",
38 		.offset = 0x170000,
39 		.size   = 0x590000,
40 	},
41 	{
42 		.name   = "uboot",
43 		.offset = 0x700000,
44 		.size   = 0x040000,
45 	},
46 	{
47 		.name   = "config",
48 		.offset = 0x740000,
49 		.size   = 0x0c0000,
50 	},
51 };
52 #endif
53 
54 
55 static __initdata struct of_device_id storcenter_of_bus[] = {
56 	{ .name = "soc", },
57 	{},
58 };
59 
60 static int __init storcenter_device_probe(void)
61 {
62 	of_platform_bus_probe(NULL, storcenter_of_bus, NULL);
63 	return 0;
64 }
65 machine_device_initcall(storcenter, storcenter_device_probe);
66 
67 
68 static int __init storcenter_add_bridge(struct device_node *dev)
69 {
70 #ifdef CONFIG_PCI
71 	int len;
72 	struct pci_controller *hose;
73 	const int *bus_range;
74 
75 	printk("Adding PCI host bridge %s\n", dev->full_name);
76 
77 	hose = pcibios_alloc_controller(dev);
78 	if (hose == NULL)
79 		return -ENOMEM;
80 
81 	bus_range = of_get_property(dev, "bus-range", &len);
82 	hose->first_busno = bus_range ? bus_range[0] : 0;
83 	hose->last_busno = bus_range ? bus_range[1] : 0xff;
84 
85 	setup_indirect_pci(hose, MPC10X_MAPB_CNFG_ADDR, MPC10X_MAPB_CNFG_DATA, 0);
86 
87 	/* Interpret the "ranges" property */
88 	/* This also maps the I/O region and sets isa_io/mem_base */
89 	pci_process_bridge_OF_ranges(hose, dev, 1);
90 #endif
91 
92 	return 0;
93 }
94 
95 static void __init storcenter_setup_arch(void)
96 {
97 	struct device_node *np;
98 
99 #ifdef CONFIG_MTD_PHYSMAP
100 	physmap_set_partitions(storcenter_physmap_partitions,
101 			       ARRAY_SIZE(storcenter_physmap_partitions));
102 #endif
103 
104 	/* Lookup PCI host bridges */
105 	for_each_compatible_node(np, "pci", "mpc10x-pci")
106 		storcenter_add_bridge(np);
107 
108 	printk(KERN_INFO "IOMEGA StorCenter\n");
109 }
110 
111 /*
112  * Interrupt setup and service.  Interrrupts on the turbostation come
113  * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
114  */
115 static void __init storcenter_init_IRQ(void)
116 {
117 	struct mpic *mpic;
118 	struct device_node *dnp;
119 	const void *prop;
120 	int size;
121 	phys_addr_t paddr;
122 
123 	dnp = of_find_node_by_type(NULL, "open-pic");
124 	if (dnp == NULL)
125 		return;
126 
127 	prop = of_get_property(dnp, "reg", &size);
128 	if (prop == NULL) {
129 		of_node_put(dnp);
130 		return;
131 	}
132 
133 	paddr = (phys_addr_t)of_translate_address(dnp, prop);
134 	mpic = mpic_alloc(dnp, paddr, MPIC_PRIMARY | MPIC_WANTS_RESET,
135 			16, 32, " OpenPIC  ");
136 
137 	of_node_put(dnp);
138 
139 	BUG_ON(mpic == NULL);
140 
141 	/*
142 	 * 16 Serial Interrupts followed by 16 Internal Interrupts.
143 	 * I2C is the second internal, so it is at 17, 0x11020.
144 	 */
145 	mpic_assign_isu(mpic, 0, paddr + 0x10200);
146 	mpic_assign_isu(mpic, 1, paddr + 0x11000);
147 
148 	mpic_init(mpic);
149 }
150 
151 static void storcenter_restart(char *cmd)
152 {
153 	local_irq_disable();
154 
155 	/* Set exception prefix high - to the firmware */
156 	_nmask_and_or_msr(0, MSR_IP);
157 
158 	/* Wait for reset to happen */
159 	for (;;) ;
160 }
161 
162 static int __init storcenter_probe(void)
163 {
164 	unsigned long root = of_get_flat_dt_root();
165 
166 	return of_flat_dt_is_compatible(root, "iomega,storcenter");
167 }
168 
169 define_machine(storcenter){
170 	.name 			= "IOMEGA StorCenter",
171 	.probe 			= storcenter_probe,
172 	.setup_arch 		= storcenter_setup_arch,
173 	.init_IRQ 		= storcenter_init_IRQ,
174 	.get_irq 		= mpic_get_irq,
175 	.restart 		= storcenter_restart,
176 	.calibrate_decr 	= generic_calibrate_decr,
177 };
178