8864e488498012700e8a0608429cbd8a67195a61
[linux-2.6.git] / arch / powerpc / platforms / embedded6xx / storcenter.c
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 };