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
27 static __initdata struct of_device_id storcenter_of_bus[] = {
28 { .name = "soc", },
29 {},
30 };
31
storcenter_device_probe(void)32 static int __init storcenter_device_probe(void)
33 {
34 of_platform_bus_probe(NULL, storcenter_of_bus, NULL);
35 return 0;
36 }
37 machine_device_initcall(storcenter, storcenter_device_probe);
38
39
storcenter_add_bridge(struct device_node * dev)40 static 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
storcenter_setup_arch(void)67 static 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 */
storcenter_init_IRQ(void)82 static 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
storcenter_restart(char * cmd)99 static 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
storcenter_probe(void)110 static 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
define_machine(storcenter)117 define_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