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 define_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
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