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 const struct of_device_id storcenter_of_bus[] __initconst = {
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 %pOF\n", dev);
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 printk(KERN_INFO "IOMEGA StorCenter\n");
70 }
71
storcenter_setup_pci(void)72 static void __init storcenter_setup_pci(void)
73 {
74 struct device_node *np;
75
76 /* Lookup PCI host bridges */
77 for_each_compatible_node(np, "pci", "mpc10x-pci")
78 storcenter_add_bridge(np);
79 }
80
81 /*
82 * Interrupt setup and service. Interrupts on the turbostation come
83 * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
84 */
storcenter_init_IRQ(void)85 static void __init storcenter_init_IRQ(void)
86 {
87 struct mpic *mpic;
88
89 mpic = mpic_alloc(NULL, 0, 0, 16, 0, " OpenPIC ");
90 BUG_ON(mpic == NULL);
91
92 /*
93 * 16 Serial Interrupts followed by 16 Internal Interrupts.
94 * I2C is the second internal, so it is at 17, 0x11020.
95 */
96 mpic_assign_isu(mpic, 0, mpic->paddr + 0x10200);
97 mpic_assign_isu(mpic, 1, mpic->paddr + 0x11000);
98
99 mpic_init(mpic);
100 }
101
storcenter_restart(char * cmd)102 static void __noreturn storcenter_restart(char *cmd)
103 {
104 local_irq_disable();
105
106 /* Set exception prefix high - to the firmware */
107 mtmsr(mfmsr() | MSR_IP);
108 isync();
109
110 /* Wait for reset to happen */
111 for (;;) ;
112 }
113
storcenter_probe(void)114 static int __init storcenter_probe(void)
115 {
116 return of_machine_is_compatible("iomega,storcenter");
117 }
118
define_machine(storcenter)119 define_machine(storcenter){
120 .name = "IOMEGA StorCenter",
121 .probe = storcenter_probe,
122 .setup_arch = storcenter_setup_arch,
123 .discover_phbs = storcenter_setup_pci,
124 .init_IRQ = storcenter_init_IRQ,
125 .get_irq = mpic_get_irq,
126 .restart = storcenter_restart,
127 .calibrate_decr = generic_calibrate_decr,
128 };
129